libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-document-transition.h"
  37 #include "ev-page-cache.h"
  38 #include "ev-pixbuf-cache.h"
  39 #include "ev-transition-animation.h"
  40 #include "ev-view-marshal.h"
  41 #include "ev-document-annotations.h"
  42 #include "ev-annotation-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         PROP_0,
  54         PROP_CONTINUOUS,
  55         PROP_DUAL_PAGE,
  56         PROP_FULLSCREEN,
  57         PROP_PRESENTATION,
  58         PROP_SIZING_MODE,
  59         PROP_ZOOM,
  60         PROP_ROTATION,
  61         PROP_HAS_SELECTION,
  62 };
  63
  64 enum {
  65         SIGNAL_BINDING_ACTIVATED,
  66         SIGNAL_ZOOM_INVALID,
  67         SIGNAL_HANDLE_LINK,
  68         SIGNAL_EXTERNAL_LINK,
  69         SIGNAL_POPUP_MENU,
  70         N_SIGNALS,
  71 };
  72
  73 enum {
  74         TARGET_DND_URI,
  75         TARGET_DND_TEXT,
  76         TARGET_DND_IMAGE
  77 };
  78
  79 static guint signals[N_SIGNALS];
  80
  81 typedef enum {
  82         EV_VIEW_FIND_NEXT,
  83         EV_VIEW_FIND_PREV
  84 } EvViewFindDirection;
  85
  86 #define ZOOM_IN_FACTOR  1.2
  87 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  88
  89 #define MIN_SCALE 0.05409
  90 #define MAX_SCALE 4.0
  91
  92 #define SCROLL_TIME 150
  93
  94 /*** Scrolling ***/
  95 static void       scroll_to_current_page                     (EvView *view,
  96                                                               GtkOrientation orientation);
  97 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  98                                                               GtkAdjustment      *hadjustment,
  99                                                               GtkAdjustment      *vadjustment);
 100 static void       view_update_range_and_current_page         (EvView             *view);
 101 static void       set_scroll_adjustment                      (EvView             *view,
 102                                                               GtkOrientation      orientation,
 103                                                               GtkAdjustment      *adjustment);
 104 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 105                                                               guint               keyval,
 106                                                               GdkModifierType modifiers,
 107                                                               GtkScrollType       scroll,
 108                                                               gboolean            horizontal);
 109 static void       ensure_rectangle_is_visible                (EvView             *view,
 110                                                               GdkRectangle       *rect);
 111
 112 /*** Geometry computations ***/
 113 static void       compute_border                             (EvView             *view,
 114                                                               int                 width,
 115                                                               int                 height,
 116                                                               GtkBorder          *border);
 117 static void       get_page_y_offset                          (EvView             *view,
 118                                                               int                 page,
 119                                                               int                *y_offset);
 120 static gboolean   get_page_extents                           (EvView             *view,
 121                                                               gint                page,
 122                                                               GdkRectangle       *page_area,
 123                                                               GtkBorder          *border);
 124 static void       view_rect_to_doc_rect                      (EvView             *view,
 125                                                               GdkRectangle       *view_rect,
 126                                                               GdkRectangle       *page_area,
 127                                                               EvRectangle        *doc_rect);
 128 static void       doc_rect_to_view_rect                      (EvView             *view,
 129                                                               int                 page,
 130                                                               EvRectangle        *doc_rect,
 131                                                               GdkRectangle       *view_rect);
 132 static gboolean   get_dual_even_left                         (EvView             *view);
 133 static void       find_page_at_location                      (EvView             *view,
 134                                                               gdouble             x,
 135                                                               gdouble             y,
 136                                                               gint               *page,
 137                                                               gint               *x_offset,
 138                                                               gint               *y_offset);
 139 static gboolean  doc_point_to_view_point                     (EvView             *view,
 140                                                               int                 page,
 141                                                               EvPoint            *doc_point,
 142                                                               GdkPoint           *view_point);
 143 /*** Hyperrefs ***/
 144 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 145                                                               gdouble             x,
 146                                                               gdouble             y);
 147 static char*      tip_from_link                              (EvView             *view,
 148                                                               EvLink             *link);
 149 /*** Forms ***/
 150 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 151                                                                gdouble            x,
 152                                                                gdouble            y);
 153
 154 /*** Annotations ***/
 155 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 156                                                               gdouble             x,
 157                                                               gdouble             y);
 158 static void          show_annotation_windows                 (EvView             *view,
 159                                                               gint                page);
 160 static void          hide_annotation_windows                 (EvView             *view,
 161                                                               gint                page);
 162 /*** GtkWidget implementation ***/
 163 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 164                                                               GtkRequisition     *requisition);
 165 static void       ev_view_size_request_continuous            (EvView             *view,
 166                                                               GtkRequisition     *requisition);
 167 static void       ev_view_size_request_dual_page             (EvView             *view,
 168                                                               GtkRequisition     *requisition);
 169 static void       ev_view_size_request_single_page           (EvView             *view,
 170                                                               GtkRequisition     *requisition);
 171 static void       ev_view_size_request                       (GtkWidget          *widget,
 172                                                               GtkRequisition     *requisition);
 173 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 174                                                               GtkAllocation      *allocation);
 175 static void       ev_view_realize                            (GtkWidget          *widget);
 176 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 177                                                               GdkEventScroll     *event);
 178 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 179                                                               GdkEventExpose     *event);
 180 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 181 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 182                                                               GdkEventButton     *event);
 183 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 184                                                               GdkEventMotion     *event);
 185 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 186                                                               GdkEventButton     *event);
 187 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 188                                                               GdkEventCrossing   *event);
 189 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 190                                                               GdkEventCrossing   *event);
 191 static void       ev_view_style_set                          (GtkWidget          *widget,
 192                                                               GtkStyle           *old_style);
 193 static void       ev_view_remove_all                         (EvView             *view);
 194
 195 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 196
 197 /*** Drawing ***/
 198 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 199 static void       draw_rubberband                            (GtkWidget          *widget,
 200                                                               GdkWindow          *window,
 201                                                               const GdkRectangle *rect,
 202                                                               guchar              alpha);
 203 static void       highlight_find_results                     (EvView             *view,
 204                                                               int                 page);
 205 static void       draw_one_page                              (EvView             *view,
 206                                                               gint                page,
 207                                                               cairo_t            *cr,
 208                                                               GdkRectangle       *page_area,
 209                                                               GtkBorder          *border,
 210                                                               GdkRectangle       *expose_area,
 211                                                               gboolean           *page_ready);
 212 static void       draw_loading_text                          (EvView             *view,
 213                                                               GdkRectangle       *page_area,
 214                                                               GdkRectangle       *expose_area);
 215 static void       ev_view_reload_page                        (EvView             *view,
 216                                                               gint                page,
 217                                                               GdkRegion          *region);
 218
 219 /*** Callbacks ***/
 220 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 221                                                               GdkRegion          *region,
 222                                                               EvView             *view);
 223 static void       page_changed_cb                            (EvPageCache        *page_cache,
 224                                                               int                 new_page,
 225                                                               EvView             *view);
 226 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 227                                                               EvView             *view);
 228
 229 /*** GObject ***/
 230 static void       ev_view_finalize                           (GObject            *object);
 231 static void       ev_view_destroy                            (GtkObject          *object);
 232 static void       ev_view_set_property                       (GObject            *object,
 233                                                               guint               prop_id,
 234                                                               const GValue       *value,
 235                                                               GParamSpec         *pspec);
 236 static void       ev_view_get_property                       (GObject            *object,
 237                                                               guint               prop_id,
 238                                                               GValue             *value,
 239                                                               GParamSpec         *pspec);
 240 static void       ev_view_class_init                         (EvViewClass        *class);
 241 static void       ev_view_init                               (EvView             *view);
 242
 243 /*** Zoom and sizing ***/
 244 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 245                                                               gdouble doc_height,
 246                                                               int     target_width,
 247                                                               int     target_height,
 248                                                               int     vsb_width);
 249 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 250                                                               gdouble doc_height,
 251                                                               int     target_width,
 252                                                               int     target_height,
 253                                                               int     vsb_height);
 254 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 255                                                               gdouble doc_height,
 256                                                               int     target_width,
 257                                                               int     target_height,
 258                                                               int     vsb_width,
 259                                                               int     hsb_width);
 260 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 261                                                               int     width,
 262                                                               int     height);
 263 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height,
 266                                                                 int     vsb_width,
 267                                                                 int     hsb_height);
 268 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height,
 271                                                                 int     vsb_width,
 272                                                                 int     hsb_height);
 273 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 274                                                                 int     width,
 275                                                                 int     height,
 276                                                                 int     vsb_width,
 277                                                                 int     hsb_height);
 278 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 279                                                                 int     width,
 280                                                                 int     height,
 281                                                                 int     vsb_width,
 282                                                                 int     hsb_height);
 283 /*** Cursors ***/
 284 static GdkCursor* ev_view_create_invisible_cursor            (void);
 285 static void       ev_view_set_cursor                         (EvView             *view,
 286                                                               EvViewCursor        new_cursor);
 287 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 288                                                               gint x,
 289                                                               gint y);
 290
 291 /*** Find ***/
 292 static gint         ev_view_find_get_n_results               (EvView             *view,
 293                                                               gint                page);
 294 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 295                                                               gint                page,
 296                                                               gint                result);
 297 static void       jump_to_find_result                        (EvView             *view);
 298 static void       jump_to_find_page                          (EvView             *view,
 299                                                               EvViewFindDirection direction,
 300                                                               gint                shift);
 301
 302 /*** Selection ***/
 303 static void       compute_selections                         (EvView             *view,
 304                                                               EvSelectionStyle    style,
 305                                                               GdkPoint           *start,
 306                                                               GdkPoint           *stop);
 307 static void       clear_selection                            (EvView             *view);
 308 static void       clear_link_selected                        (EvView             *view);
 309 static void       selection_free                             (EvViewSelection    *selection);
 310 static char*      get_selected_text                          (EvView             *ev_view);
 311 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 312                                                               GtkSelectionData   *selection_data,
 313                                                               guint               info,
 314                                                               gpointer            data);
 315 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 316                                                               gpointer            data);
 317 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 318
 319 /*** Presentation ***/
 320 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 321 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 322
 323
 324 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 325
 326 /* HeightToPage cache */
 327 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 328
 329 static void
 330 build_height_to_page (EvHeightToPageCache *cache,
 331                       EvDocument          *document,
 332                       gint                 rotation)
 333 {
 334         gboolean swap, uniform, dual_even_left;
 335         int i;
 336         double uniform_height, page_height, next_page_height;
 337         double saved_height;
 338         gdouble u_width, u_height;
 339         gint n_pages;
 340
 341         swap = (rotation == 90 || rotation == 270);
 342
 343         uniform = ev_document_is_page_size_uniform (document);
 344         n_pages = ev_document_get_n_pages (document);
 345         dual_even_left = (n_pages > 2);
 346
 347         g_free (cache->height_to_page);
 348         g_free (cache->dual_height_to_page);
 349
 350         cache->rotation = rotation;
 351         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 352         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 353
 354         if (uniform)
 355                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 356
 357         saved_height = 0;
 358         for (i = 0; i <= n_pages; i++) {
 359                 if (uniform) {
 360                         uniform_height = swap ? u_width : u_height;
 361                         cache->height_to_page[i] = i * uniform_height;
 362                 } else {
 363                         if (i < n_pages) {
 364                                 gdouble w, h;
 365
 366                                 ev_document_get_page_size (document, i, &w, &h);
 367                                 page_height = swap ? w : h;
 368                         } else {
 369                                 page_height = 0;
 370                         }
 371                         cache->height_to_page[i] = saved_height;
 372                         saved_height += page_height;
 373                 }
 374         }
 375
 376         if (dual_even_left && !uniform) {
 377                 gdouble w, h;
 378
 379                 ev_document_get_page_size (document, 0, &w, &h);
 380                 saved_height = swap ? w : h;
 381         } else {
 382                 saved_height = 0;
 383         }
 384
 385         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 386                 if (uniform) {
 387                         uniform_height = swap ? u_width : u_height;
 388                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 389                         if (i + 1 < n_pages + 2)
 390                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 391                 } else {
 392                         if (i + 1 < n_pages) {
 393                                 gdouble w, h;
 394
 395                                 ev_document_get_page_size (document, i + 1, &w, &h);
 396                                 next_page_height = swap ? w : h;
 397                         } else {
 398                                 next_page_height = 0;
 399                         }
 400
 401                         if (i < n_pages) {
 402                                 gdouble w, h;
 403
 404                                 ev_document_get_page_size (document, i, &w, &h);
 405                                 page_height = swap ? w : h;
 406                         } else {
 407                                 page_height = 0;
 408                         }
 409
 410                         if (i + 1 < n_pages + 2) {
 411                                 cache->dual_height_to_page[i] = saved_height;
 412                                 cache->dual_height_to_page[i + 1] = saved_height;
 413                                 saved_height += MAX(page_height, next_page_height);
 414                         } else {
 415                                 cache->dual_height_to_page[i] = saved_height;
 416                         }
 417                 }
 418         }
 419 }
 420
 421 static void
 422 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 423                                     EvDocument          *document,
 424                                     gint                 page,
 425                                     gint                 rotation,
 426                                     gdouble             *height,
 427                                     gdouble             *dual_height)
 428 {
 429         if (cache->rotation != rotation)
 430                 build_height_to_page (cache, document, rotation);
 431
 432         *height = cache->height_to_page[page];
 433         *dual_height = cache->dual_height_to_page[page];
 434 }
 435
 436 static void
 437 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 438 {
 439         if (cache->height_to_page) {
 440                 g_free (cache->height_to_page);
 441                 cache->height_to_page = NULL;
 442         }
 443
 444         if (cache->dual_height_to_page) {
 445                 g_free (cache->dual_height_to_page);
 446                 cache->dual_height_to_page = NULL;
 447         }
 448         g_free (cache);
 449 }
 450
 451 static EvHeightToPageCache *
 452 ev_view_get_height_to_page_cache (EvView *view)
 453 {
 454         EvHeightToPageCache *cache;
 455
 456         if (!view->document)
 457                 return NULL;
 458
 459         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 460         if (!cache) {
 461                 cache = g_new0 (EvHeightToPageCache, 1);
 462                 build_height_to_page (cache, view->document, view->rotation);
 463                 g_object_set_data_full (G_OBJECT (view->document),
 464                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 465                                         cache,
 466                                         (GDestroyNotify)ev_height_to_page_cache_free);
 467         }
 468
 469         return cache;
 470 }
 471
 472 static void
 473 ev_view_get_height_to_page (EvView *view,
 474                             gint    page,
 475                             gint   *height,
 476                             gint   *dual_height)
 477 {
 478         gdouble h, dh;
 479
 480         if (!view->height_to_page_cache)
 481                 return;
 482
 483         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 484                                             view->document,
 485                                             page,
 486                                             view->rotation,
 487                                             &h, &dh);
 488         if (height)
 489                 *height = (gint)(h * view->scale + 0.5);
 490
 491         if (dual_height)
 492                 *dual_height = (gint)(dh * view->scale + 0.5);
 493 }
 494
 495 static void
 496 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 497 {
 498         GdkPoint view_point;
 499
 500         if (view->document == NULL) {
 501                 return;
 502         }
 503
 504         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 505
 506         if (orientation == GTK_ORIENTATION_VERTICAL) {
 507                 view->pending_point.y = 0;
 508         } else {
 509                 view->pending_point.x = 0;
 510         }
 511
 512         if (orientation == GTK_ORIENTATION_VERTICAL) {
 513                 if (view->continuous) {
 514                         gtk_adjustment_clamp_page (view->vadjustment,
 515                                                    view_point.y - view->spacing / 2,
 516                                                    view_point.y + view->vadjustment->page_size);
 517                 } else {
 518                         gtk_adjustment_set_value (view->vadjustment,
 519                                                   CLAMP (view_point.y,
 520                                                   view->vadjustment->lower,
 521                                                   view->vadjustment->upper -
 522                                                   view->vadjustment->page_size));
 523                 }
 524         } else {
 525                 if (view->dual_page) {
 526                         gtk_adjustment_clamp_page (view->hadjustment,
 527                                                    view_point.x,
 528                                                    view_point.x + view->hadjustment->page_size);
 529                 } else {
 530                         gtk_adjustment_set_value (view->hadjustment,
 531                                                   CLAMP (view_point.x,
 532                                                   view->hadjustment->lower,
 533                                                   view->hadjustment->upper -
 534                                                   view->hadjustment->page_size));
 535                 }
 536         }
 537 }
 538
 539 static void
 540 view_set_adjustment_values (EvView         *view,
 541                             GtkOrientation  orientation)
 542 {
 543         GtkWidget *widget = GTK_WIDGET (view);
 544         GtkAdjustment *adjustment;
 545         int requisition;
 546         int allocation;
 547
 548         double factor;
 549         gint new_value;
 550
 551         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 552                 requisition = widget->requisition.width;
 553                 allocation = widget->allocation.width;
 554                 adjustment = view->hadjustment;
 555         } else {
 556                 requisition = widget->requisition.height;
 557                 allocation = widget->allocation.height;
 558                 adjustment = view->vadjustment;
 559         }
 560
 561         if (!adjustment)
 562                 return;
 563
 564         factor = 1.0;
 565         switch (view->pending_scroll) {
 566                 case SCROLL_TO_KEEP_POSITION:
 567                 case SCROLL_TO_FIND_LOCATION:
 568                         factor = (adjustment->value) / adjustment->upper;
 569                         break;
 570                 case SCROLL_TO_PAGE_POSITION:
 571                         break;
 572                 case SCROLL_TO_CENTER:
 573                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 574                         break;
 575         }
 576
 577         adjustment->page_size = allocation;
 578         adjustment->step_increment = allocation * 0.1;
 579         adjustment->page_increment = allocation * 0.9;
 580         adjustment->lower = 0;
 581         adjustment->upper = MAX (allocation, requisition);
 582
 583         /*
 584          * We add 0.5 to the values before to average out our rounding errors.
 585          */
 586         switch (view->pending_scroll) {
 587                 case SCROLL_TO_KEEP_POSITION:
 588                 case SCROLL_TO_FIND_LOCATION:
 589                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 590                         gtk_adjustment_set_value (adjustment, (int)new_value);
 591                         break;
 592                 case SCROLL_TO_PAGE_POSITION:
 593                         scroll_to_current_page (view, orientation);
 594                         break;
 595                 case SCROLL_TO_CENTER:
 596                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 597                                            0, adjustment->upper - adjustment->page_size);
 598                         gtk_adjustment_set_value (adjustment, (int)new_value);
 599                         break;
 600         }
 601
 602         gtk_adjustment_changed (adjustment);
 603 }
 604
 605 static void
 606 view_update_range_and_current_page (EvView *view)
 607 {
 608         gint current_page;
 609         gint best_current_page = -1;
 610         gint start = view->start_page;
 611         gint end = view->end_page;
 612
 613         /* Presentation trumps all other modes */
 614         if (view->presentation) {
 615                 view->start_page = view->current_page;
 616                 view->end_page = view->current_page;
 617         } else if (view->continuous) {
 618                 GdkRectangle current_area, unused, page_area;
 619                 GtkBorder border;
 620                 gboolean found = FALSE;
 621                 gint area_max = -1, area;
 622                 int i;
 623
 624                 if (!(view->vadjustment && view->hadjustment))
 625                         return;
 626
 627                 current_area.x = view->hadjustment->value;
 628                 current_area.width = view->hadjustment->upper;
 629                 current_area.y = view->vadjustment->value;
 630                 current_area.height = view->vadjustment->page_size;
 631
 632                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 633
 634                         get_page_extents (view, i, &page_area, &border);
 635
 636                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 637                                 area = unused.width * unused.height;
 638
 639                                 if (!found) {
 640                                         area_max = area;
 641                                         view->start_page = i;
 642                                         found = TRUE;
 643                                         best_current_page = i;
 644                                 }
 645                                 if (area > area_max) {
 646                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 647                                         area_max = area;
 648                                 }
 649
 650                                 view->end_page = i;
 651                         } else if (found && view->current_page <= view->end_page) {
 652                                 break;
 653                         }
 654                 }
 655
 656         } else if (view->dual_page) {
 657                 if (view->current_page % 2 == get_dual_even_left (view)) {
 658                         view->start_page = view->current_page;
 659                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 660                                 view->end_page = view->start_page + 1;
 661                         else
 662                                 view->end_page = view->start_page;
 663                 } else {
 664                         if (view->current_page < 1)
 665                                 view->start_page = view->current_page;
 666                         else
 667                                 view->start_page = view->current_page - 1;
 668                         view->end_page = view->current_page;
 669                 }
 670         } else {
 671                 view->start_page = view->current_page;
 672                 view->end_page = view->current_page;
 673         }
 674
 675         best_current_page = MAX (best_current_page, view->start_page);
 676         current_page = ev_page_cache_get_current_page (view->page_cache);
 677
 678         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 679                 view->current_page = best_current_page;
 680                 ev_page_cache_set_current_page (view->page_cache, best_current_page);
 681         }
 682
 683         if (start != view->start_page || end != view->end_page) {
 684                 gint i;
 685
 686                 for (i = start; i < view->start_page; i++) {
 687                         hide_annotation_windows (view, i);
 688                 }
 689
 690                 for (i = end; i > view->end_page; i--) {
 691                         hide_annotation_windows (view, i);
 692                 }
 693         }
 694
 695         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 696                                         view->start_page,
 697                                         view->end_page,
 698                                         view->rotation,
 699                                         view->scale,
 700                                         view->selection_info.selections);
 701 }
 702
 703 static void
 704 set_scroll_adjustment (EvView *view,
 705                        GtkOrientation  orientation,
 706                        GtkAdjustment  *adjustment)
 707 {
 708         GtkAdjustment **to_set;
 709
 710         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 711                 to_set = &view->hadjustment;
 712         else
 713                 to_set = &view->vadjustment;
 714
 715         if (*to_set != adjustment) {
 716                 if (*to_set) {
 717                         g_signal_handlers_disconnect_by_func (*to_set,
 718                                                               (gpointer) on_adjustment_value_changed,
 719                                                               view);
 720                         g_object_unref (*to_set);
 721                 }
 722
 723                 *to_set = adjustment;
 724                 view_set_adjustment_values (view, orientation);
 725
 726                 if (*to_set) {
 727                         g_object_ref (*to_set);
 728                         g_signal_connect (*to_set, "value_changed",
 729                                           G_CALLBACK (on_adjustment_value_changed), view);
 730                 }
 731         }
 732 }
 733
 734 static void
 735 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 736                                 GtkAdjustment  *hadjustment,
 737                                 GtkAdjustment  *vadjustment)
 738 {
 739         EvView *view = EV_VIEW (layout);
 740
 741         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 742         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 743
 744         on_adjustment_value_changed (NULL, view);
 745 }
 746
 747 static void
 748 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 749                            guint           keyval,
 750                            GdkModifierType modifiers,
 751                            GtkScrollType   scroll,
 752                            gboolean        horizontal)
 753 {
 754   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 755
 756   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 757                                 "binding_activated", 2,
 758                                 GTK_TYPE_SCROLL_TYPE, scroll,
 759                                 G_TYPE_BOOLEAN, horizontal);
 760   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 761                                 "binding_activated", 2,
 762                                 GTK_TYPE_SCROLL_TYPE, scroll,
 763                                 G_TYPE_BOOLEAN, horizontal);
 764 }
 765
 766 void
 767 ev_view_scroll (EvView        *view,
 768                 GtkScrollType  scroll,
 769                 gboolean       horizontal)
 770 {
 771         GtkAdjustment *adjustment;
 772         double value, increment;
 773         gboolean first_page = FALSE;
 774         gboolean last_page = FALSE;
 775
 776         view->jump_to_find_result = FALSE;
 777
 778         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 779                 switch (scroll) {
 780                         case GTK_SCROLL_PAGE_BACKWARD:
 781                         case GTK_SCROLL_STEP_BACKWARD:
 782                                 ev_view_previous_page (view);
 783                                 break;
 784                         case GTK_SCROLL_PAGE_FORWARD:
 785                         case GTK_SCROLL_STEP_FORWARD:
 786                                 ev_view_next_page (view);
 787                                 break;
 788                         default:
 789                                 break;
 790                 }
 791                 return;
 792         }
 793
 794         /* Assign values for increment and vertical adjustment */
 795         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 796         increment = adjustment->page_size * 0.75;
 797         value = adjustment->value;
 798
 799         /* Assign boolean for first and last page */
 800         if (view->current_page == 0)
 801                 first_page = TRUE;
 802         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 803                 last_page = TRUE;
 804
 805         switch (scroll) {
 806                 case GTK_SCROLL_PAGE_BACKWARD:
 807                         /* Do not jump backwards if at the first page */
 808                         if (value == (adjustment->lower) && first_page) {
 809                                 /* Do nothing */
 810                                 /* At the top of a page, assign the upper bound limit of previous page */
 811                         } else if (value == (adjustment->lower)) {
 812                                 value = adjustment->upper - adjustment->page_size;
 813                                 ev_view_previous_page (view);
 814                                 /* Jump to the top */
 815                         } else {
 816                                 value = MAX (value - increment, adjustment->lower);
 817                         }
 818                         break;
 819                 case GTK_SCROLL_PAGE_FORWARD:
 820                         /* Do not jump forward if at the last page */
 821                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 822                                 /* Do nothing */
 823                         /* At the bottom of a page, assign the lower bound limit of next page */
 824                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 825                                 value = 0;
 826                                 ev_view_next_page (view);
 827                         /* Jump to the bottom */
 828                         } else {
 829                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 830                         }
 831                         break;
 832                 case GTK_SCROLL_STEP_BACKWARD:
 833                         value -= adjustment->step_increment;
 834                         break;
 835                 case GTK_SCROLL_STEP_FORWARD:
 836                         value += adjustment->step_increment;
 837                         break;
 838                 case GTK_SCROLL_STEP_DOWN:
 839                         value -= adjustment->step_increment / 10;
 840                         break;
 841                 case GTK_SCROLL_STEP_UP:
 842                         value += adjustment->step_increment / 10;
 843                         break;
 844                 default:
 845                         break;
 846         }
 847
 848         value = CLAMP (value, adjustment->lower,
 849                        adjustment->upper - adjustment->page_size);
 850
 851         gtk_adjustment_set_value (adjustment, value);
 852 }
 853
 854 #define MARGIN 5
 855
 856 static void
 857 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 858 {
 859         GtkWidget *widget = GTK_WIDGET (view);
 860         GtkAdjustment *adjustment;
 861         int value;
 862
 863         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 864
 865         adjustment = view->vadjustment;
 866
 867         if (rect->y < adjustment->value) {
 868                 value = MAX (adjustment->lower, rect->y - MARGIN);
 869                 gtk_adjustment_set_value (view->vadjustment, value);
 870         } else if (rect->y + rect->height >
 871                    adjustment->value + widget->allocation.height) {
 872                 value = MIN (adjustment->upper, rect->y + rect->height -
 873                              widget->allocation.height + MARGIN);
 874                 gtk_adjustment_set_value (view->vadjustment, value);
 875         }
 876
 877         adjustment = view->hadjustment;
 878
 879         if (rect->x < adjustment->value) {
 880                 value = MAX (adjustment->lower, rect->x - MARGIN);
 881                 gtk_adjustment_set_value (view->hadjustment, value);
 882         } else if (rect->x + rect->height >
 883                    adjustment->value + widget->allocation.width) {
 884                 value = MIN (adjustment->upper, rect->x + rect->width -
 885                              widget->allocation.width + MARGIN);
 886                 gtk_adjustment_set_value (view->hadjustment, value);
 887         }
 888
 889         gtk_widget_queue_resize (GTK_WIDGET (view));
 890 }
 891
 892 /*** Geometry computations ***/
 893
 894 static void
 895 compute_border (EvView *view, int width, int height, GtkBorder *border)
 896 {
 897         if (view->presentation) {
 898                 border->left = 0;
 899                 border->right = 0;
 900                 border->top = 0;
 901                 border->bottom = 0;
 902         } else {
 903                 ev_document_misc_get_page_border_size (width, height, border);
 904         }
 905 }
 906
 907 static void
 908 ev_view_get_max_page_size (EvView *view,
 909                            gint   *max_width,
 910                            gint   *max_height)
 911 {
 912         double w, h;
 913         gint   width, height;
 914
 915         ev_document_get_max_page_size (view->document, &w, &h);
 916
 917         width = (gint)(w * view->scale + 0.5);
 918         height = (gint)(h * view->scale + 0.5);
 919
 920         if (max_width)
 921                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
 922         if (max_height)
 923                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
 924 }
 925
 926 static void
 927 get_page_y_offset (EvView *view, int page, int *y_offset)
 928 {
 929         int max_width, offset;
 930         GtkBorder border;
 931
 932         g_return_if_fail (y_offset != NULL);
 933
 934         ev_view_get_max_page_size (view, &max_width, NULL);
 935         compute_border (view, max_width, max_width, &border);
 936
 937         if (view->dual_page) {
 938                 ev_view_get_height_to_page (view, page, NULL, &offset);
 939                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
 940                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
 941         } else {
 942                 ev_view_get_height_to_page (view, page, &offset, NULL);
 943                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 944         }
 945
 946         *y_offset = offset;
 947         return;
 948 }
 949
 950 static gboolean
 951 get_page_extents (EvView       *view,
 952                   gint          page,
 953                   GdkRectangle *page_area,
 954                   GtkBorder    *border)
 955 {
 956         GtkWidget *widget;
 957         int width, height;
 958
 959         widget = GTK_WIDGET (view);
 960
 961         /* Get the size of the page */
 962         ev_page_cache_get_size (view->page_cache, page,
 963                                 view->rotation,
 964                                 view->scale,
 965                                 &width, &height);
 966         compute_border (view, width, height, border);
 967         page_area->width = width + border->left + border->right;
 968         page_area->height = height + border->top + border->bottom;
 969
 970         if (view->presentation) {
 971                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 972                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 973         } else if (view->continuous) {
 974                 gint max_width;
 975                 gint x, y;
 976
 977                 ev_view_get_max_page_size (view, &max_width, NULL);
 978                 max_width = max_width + border->left + border->right;
 979                 /* Get the location of the bounding box */
 980                 if (view->dual_page) {
 981                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
 982                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 983                         if (page % 2 == get_dual_even_left (view))
 984                                 x = x + (max_width - width - border->left - border->right);
 985                 } else {
 986                         x = view->spacing;
 987                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 988                 }
 989
 990                 get_page_y_offset (view, page, &y);
 991
 992                 page_area->x = x;
 993                 page_area->y = y;
 994         } else {
 995                 gint x, y;
 996                 if (view->dual_page) {
 997                         gint width_2, height_2;
 998                         gint max_width = width;
 999                         gint max_height = height;
1000                         GtkBorder overall_border;
1001                         gint other_page;
1002
1003                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1004
1005                         /* First, we get the bounding box of the two pages */
1006                         if (other_page < ev_document_get_n_pages (view->document)
1007                             && (0 <= other_page)) {
1008                                 ev_page_cache_get_size (view->page_cache,
1009                                                         other_page,
1010                                                         view->rotation,
1011                                                         view->scale,
1012                                                         &width_2, &height_2);
1013                                 if (width_2 > width)
1014                                         max_width = width_2;
1015                                 if (height_2 > height)
1016                                         max_height = height_2;
1017                         }
1018                         compute_border (view, max_width, max_height, &overall_border);
1019
1020                         /* Find the offsets */
1021                         x = view->spacing;
1022                         y = view->spacing;
1023
1024                         /* Adjust for being the left or right page */
1025                         if (page % 2 == get_dual_even_left (view))
1026                                 x = x + max_width - width;
1027                         else
1028                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1029
1030                         y = y + (max_height - height)/2;
1031
1032                         /* Adjust for extra allocation */
1033                         x = x + MAX (0, widget->allocation.width -
1034                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1035                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1036                 } else {
1037                         x = view->spacing;
1038                         y = view->spacing;
1039
1040                         /* Adjust for extra allocation */
1041                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1042                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1043                 }
1044
1045                 page_area->x = x;
1046                 page_area->y = y;
1047         }
1048
1049         return TRUE;
1050 }
1051
1052 static void
1053 get_doc_page_size (EvView  *view,
1054                    gint     page,
1055                    gdouble *width,
1056                    gdouble *height)
1057 {
1058         double w, h;
1059
1060         ev_document_get_page_size (view->document, page, &w, &h);
1061         if (view->rotation == 0 || view->rotation == 180) {
1062                 if (width) *width = w;
1063                 if (height) *height = h;
1064         } else {
1065                 if (width) *width = h;
1066                 if (height) *height = w;
1067         }
1068 }
1069
1070 static void
1071 view_point_to_doc_point (EvView *view,
1072                          GdkPoint *view_point,
1073                          GdkRectangle *page_area,
1074                          double  *doc_point_x,
1075                          double  *doc_point_y)
1076 {
1077         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1078         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1079 }
1080
1081 static void
1082 view_rect_to_doc_rect (EvView *view,
1083                        GdkRectangle *view_rect,
1084                        GdkRectangle *page_area,
1085                        EvRectangle  *doc_rect)
1086 {
1087         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1088         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1089         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1090         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1091 }
1092
1093 static gboolean
1094 doc_point_to_view_point (EvView       *view,
1095                          int           page,
1096                          EvPoint      *doc_point,
1097                          GdkPoint     *view_point)
1098 {
1099         GdkRectangle page_area;
1100         GtkBorder border;
1101         double x, y, view_x, view_y;
1102         gdouble width, height;
1103
1104         get_doc_page_size (view, page, &width, &height);
1105
1106         if (view->rotation == 0) {
1107                 x = doc_point->x;
1108                 y = doc_point->y;
1109         } else if (view->rotation == 90) {
1110                 x = width - doc_point->y;
1111                 y = doc_point->x;
1112         } else if (view->rotation == 180) {
1113                 x = width - doc_point->x;
1114                 y = height - doc_point->y;
1115         } else if (view->rotation == 270) {
1116                 x = doc_point->y;
1117                 y = height - doc_point->x;
1118         } else {
1119                 g_assert_not_reached ();
1120         }
1121
1122         get_page_extents (view, page, &page_area, &border);
1123
1124         view_x = x * view->scale;
1125         view_y = y * view->scale;
1126         view_point->x = view_x + page_area.x;
1127         view_point->y = view_y + page_area.y;
1128
1129         return (view_x > 0 && view_x <= page_area.width &&
1130                 view_y > 0 && view_y <= page_area.height);
1131 }
1132
1133 static void
1134 doc_rect_to_view_rect (EvView       *view,
1135                        int           page,
1136                        EvRectangle  *doc_rect,
1137                        GdkRectangle *view_rect)
1138 {
1139         GdkRectangle page_area;
1140         GtkBorder border;
1141         double x, y, w, h;
1142         gdouble width, height;
1143
1144         get_doc_page_size (view, page, &width, &height);
1145
1146         if (view->rotation == 0) {
1147                 x = doc_rect->x1;
1148                 y = doc_rect->y1;
1149                 w = doc_rect->x2 - doc_rect->x1;
1150                 h = doc_rect->y2 - doc_rect->y1;
1151         } else if (view->rotation == 90) {
1152                 x = width - doc_rect->y2;
1153                 y = doc_rect->x1;
1154                 w = doc_rect->y2 - doc_rect->y1;
1155                 h = doc_rect->x2 - doc_rect->x1;
1156         } else if (view->rotation == 180) {
1157                 x = width - doc_rect->x2;
1158                 y = height - doc_rect->y2;
1159                 w = doc_rect->x2 - doc_rect->x1;
1160                 h = doc_rect->y2 - doc_rect->y1;
1161         } else if (view->rotation == 270) {
1162                 x = doc_rect->y1;
1163                 y = height - doc_rect->x2;
1164                 w = doc_rect->y2 - doc_rect->y1;
1165                 h = doc_rect->x2 - doc_rect->x1;
1166         } else {
1167                 g_assert_not_reached ();
1168         }
1169
1170         get_page_extents (view, page, &page_area, &border);
1171
1172         view_rect->x = x * view->scale + page_area.x;
1173         view_rect->y = y * view->scale + page_area.y;
1174         view_rect->width = w * view->scale;
1175         view_rect->height = h * view->scale;
1176 }
1177
1178 static gboolean
1179 get_dual_even_left (EvView *view)
1180 {
1181         return (ev_document_get_n_pages (view->document) > 2);
1182 }
1183
1184 static void
1185 find_page_at_location (EvView  *view,
1186                        gdouble  x,
1187                        gdouble  y,
1188                        gint    *page,
1189                        gint    *x_offset,
1190                        gint    *y_offset)
1191 {
1192         int i;
1193
1194         if (view->document == NULL)
1195                 return;
1196
1197         g_assert (page);
1198         g_assert (x_offset);
1199         g_assert (y_offset);
1200
1201         for (i = view->start_page; i <= view->end_page; i++) {
1202                 GdkRectangle page_area;
1203                 GtkBorder border;
1204
1205                 if (! get_page_extents (view, i, &page_area, &border))
1206                         continue;
1207
1208                 if ((x >= page_area.x + border.left) &&
1209                     (x < page_area.x + page_area.width - border.right) &&
1210                     (y >= page_area.y + border.top) &&
1211                     (y < page_area.y + page_area.height - border.bottom)) {
1212                         *page = i;
1213                         *x_offset = x - (page_area.x + border.left);
1214                         *y_offset = y - (page_area.y + border.top);
1215                         return;
1216                 }
1217         }
1218
1219         *page = -1;
1220 }
1221
1222 static gboolean
1223 location_in_text (EvView  *view,
1224                   gdouble  x,
1225                   gdouble  y)
1226 {
1227         GdkRegion *region;
1228         gint page = -1;
1229         gint x_offset = 0, y_offset = 0;
1230
1231         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1232
1233         if (page == -1)
1234                 return FALSE;
1235
1236         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1237
1238         if (region)
1239                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1240         else
1241                 return FALSE;
1242 }
1243
1244 static int
1245 ev_view_get_width (EvView *view)
1246 {
1247         return GTK_WIDGET (view)->allocation.width;
1248 }
1249
1250 static int
1251 ev_view_get_height (EvView *view)
1252 {
1253         return GTK_WIDGET (view)->allocation.height;
1254 }
1255
1256 static gboolean
1257 location_in_selected_text (EvView  *view,
1258                            gdouble  x,
1259                            gdouble  y)
1260 {
1261         gint page = -1;
1262         gint x_offset = 0, y_offset = 0;
1263         EvViewSelection *selection;
1264         GList *l = NULL;
1265
1266         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1267                 selection = (EvViewSelection *)l->data;
1268
1269                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1270
1271                 if (page != selection->page)
1272                         continue;
1273
1274                 if (selection->covered_region &&
1275                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1276                         return TRUE;
1277         }
1278
1279         return FALSE;
1280 }
1281
1282 static gboolean
1283 get_doc_point_from_offset (EvView *view,
1284                            gint    page,
1285                            gint    x_offset,
1286                            gint    y_offset,
1287                            gint   *x_new,
1288                            gint   *y_new)
1289 {
1290         gdouble width, height;
1291         double x, y;
1292
1293         get_doc_page_size (view, page, &width, &height);
1294
1295         x_offset = x_offset / view->scale;
1296         y_offset = y_offset / view->scale;
1297
1298         if (view->rotation == 0) {
1299                 x = x_offset;
1300                 y = y_offset;
1301         } else if (view->rotation == 90) {
1302                 x = y_offset;
1303                 y = width - x_offset;
1304         } else if (view->rotation == 180) {
1305                 x = width - x_offset;
1306                 y = height - y_offset;
1307         } else if (view->rotation == 270) {
1308                 x = height - y_offset;
1309                 y = x_offset;
1310         } else {
1311                 g_assert_not_reached ();
1312         }
1313
1314         *x_new = x;
1315         *y_new = y;
1316
1317         return TRUE;
1318 }
1319
1320 static gboolean
1321 get_doc_point_from_location (EvView  *view,
1322                              gdouble  x,
1323                              gdouble  y,
1324                              gint    *page,
1325                              gint    *x_new,
1326                              gint    *y_new)
1327 {
1328         gint x_offset = 0, y_offset = 0;
1329
1330         x += view->scroll_x;
1331         y += view->scroll_y;
1332         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1333         if (*page == -1)
1334                 return FALSE;
1335
1336         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1337 }
1338
1339 static void
1340 ev_view_get_area_from_mapping (EvView       *view,
1341                                guint         page,
1342                                GList        *mapping_list,
1343                                gconstpointer data,
1344                                GdkRectangle *area)
1345 {
1346         EvMapping *mapping;
1347
1348         mapping = ev_mapping_list_find (mapping_list, data);
1349         doc_rect_to_view_rect (view, page, &mapping->area, area);
1350         area->x -= view->scroll_x;
1351         area->y -= view->scroll_y;
1352 }
1353
1354
1355 /*** Hyperref ***/
1356 static EvLink *
1357 ev_view_get_link_at_location (EvView  *view,
1358                               gdouble  x,
1359                               gdouble  y)
1360 {
1361         gint page = -1;
1362         gint x_new = 0, y_new = 0;
1363         GList *link_mapping;
1364
1365         if (!EV_IS_DOCUMENT_LINKS (view->document))
1366                 return NULL;
1367
1368         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1369                 return NULL;
1370
1371         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1372
1373         if (link_mapping)
1374                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1375         else
1376                 return NULL;
1377 }
1378
1379 static void
1380 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1381 {
1382         EvPoint doc_point;
1383         gdouble zoom, left, top;
1384         gboolean change_left, change_top;
1385
1386         left = ev_link_dest_get_left (dest, &change_left);
1387         top = ev_link_dest_get_top (dest, &change_top);
1388
1389         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1390                                        ev_link_dest_get_bottom (dest) - top,
1391                                        ev_view_get_width (view),
1392                                        ev_view_get_height (view), 0, 0);
1393
1394         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1395         ev_view_set_zoom (view, zoom, FALSE);
1396
1397         doc_point.x = change_left ? left : 0;
1398         doc_point.y = change_top ? top : 0;
1399
1400         view->current_page = ev_link_dest_get_page (dest);
1401         if (change_left || change_top)
1402                 view->pending_point = doc_point;
1403         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1404
1405         gtk_widget_queue_resize (GTK_WIDGET (view));
1406 }
1407
1408 static void
1409 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1410 {
1411         EvPoint doc_point;
1412         gdouble doc_width, doc_height;
1413         gint page;
1414         double zoom, left;
1415         gboolean change_left;
1416
1417         page = ev_link_dest_get_page (dest);
1418         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1419
1420         left = ev_link_dest_get_left (dest, &change_left);
1421         doc_point.x = change_left ? left : 0;
1422         doc_point.y = 0;
1423
1424         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1425                                          ev_view_get_width (view),
1426                                          ev_view_get_height (view), 0);
1427
1428         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1429         ev_view_set_zoom (view, zoom, FALSE);
1430
1431         view->current_page = page;
1432         if (change_left)
1433                 view->pending_point = doc_point;
1434         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1435
1436         gtk_widget_queue_resize (GTK_WIDGET (view));
1437 }
1438
1439 static void
1440 goto_fith_dest (EvView *view, EvLinkDest *dest)
1441 {
1442         EvPoint doc_point;
1443         gdouble doc_width, doc_height;
1444         gint page;
1445         gdouble zoom, top;
1446         gboolean change_top;
1447
1448         page = ev_link_dest_get_page (dest);
1449         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1450
1451         top = ev_link_dest_get_top (dest, &change_top);
1452
1453         doc_point.x = 0;
1454         doc_point.y = change_top ? top : 0;
1455
1456         zoom = zoom_for_size_fit_width (doc_width, top,
1457                                         ev_view_get_width (view),
1458                                         ev_view_get_height (view), 0);
1459
1460         ev_view_set_sizing_mode (view, EV_SIZING_FIT_WIDTH);
1461         ev_view_set_zoom (view, zoom, FALSE);
1462
1463         view->current_page = page;
1464         if (change_top)
1465                 view->pending_point = doc_point;
1466         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1467
1468         gtk_widget_queue_resize (GTK_WIDGET (view));
1469 }
1470
1471 static void
1472 goto_fit_dest (EvView *view, EvLinkDest *dest)
1473 {
1474         double zoom;
1475         gdouble doc_width, doc_height;
1476         int page;
1477
1478         page = ev_link_dest_get_page (dest);
1479         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1480
1481         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1482                                        ev_view_get_height (view), 0, 0);
1483
1484         ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
1485         ev_view_set_zoom (view, zoom, FALSE);
1486
1487         view->current_page = page;
1488         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1489
1490         gtk_widget_queue_resize (GTK_WIDGET (view));
1491 }
1492
1493 static void
1494 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1495 {
1496         EvPoint doc_point;
1497         gint page;
1498         gdouble zoom, left, top;
1499         gboolean change_zoom, change_left, change_top;
1500
1501         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1502         page = ev_link_dest_get_page (dest);
1503
1504         if (change_zoom && zoom > 1) {
1505                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1506                 ev_view_set_zoom (view, zoom, FALSE);
1507         }
1508
1509         left = ev_link_dest_get_left (dest, &change_left);
1510         top = ev_link_dest_get_top (dest, &change_top);
1511
1512         doc_point.x = change_left ? left : 0;
1513         doc_point.y = change_top ? top : 0;
1514
1515         view->current_page = page;
1516         if (change_left || change_top)
1517                 view->pending_point = doc_point;
1518         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1519
1520         gtk_widget_queue_resize (GTK_WIDGET (view));
1521 }
1522
1523 static void
1524 goto_dest (EvView *view, EvLinkDest *dest)
1525 {
1526         EvLinkDestType type;
1527         int page, n_pages, current_page;
1528
1529         page = ev_link_dest_get_page (dest);
1530         n_pages = ev_document_get_n_pages (view->document);
1531
1532         if (page < 0 || page >= n_pages)
1533                 return;
1534
1535         current_page = view->current_page;
1536
1537         type = ev_link_dest_get_dest_type (dest);
1538
1539         switch (type) {
1540                 case EV_LINK_DEST_TYPE_PAGE:
1541                         ev_page_cache_set_current_page (view->page_cache, page);
1542                         break;
1543                 case EV_LINK_DEST_TYPE_FIT:
1544                         goto_fit_dest (view, dest);
1545                         break;
1546                 case EV_LINK_DEST_TYPE_FITH:
1547                         goto_fith_dest (view, dest);
1548                         break;
1549                 case EV_LINK_DEST_TYPE_FITV:
1550                         goto_fitv_dest (view, dest);
1551                         break;
1552                 case EV_LINK_DEST_TYPE_FITR:
1553                         goto_fitr_dest (view, dest);
1554                         break;
1555                 case EV_LINK_DEST_TYPE_XYZ:
1556                         goto_xyz_dest (view, dest);
1557                         break;
1558                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1559                         ev_page_cache_set_page_label (view->page_cache, ev_link_dest_get_page_label (dest));
1560                         break;
1561                 default:
1562                         g_assert_not_reached ();
1563         }
1564
1565         if (current_page != view->current_page)
1566                 ev_page_cache_set_current_page (view->page_cache,
1567                                                 view->current_page);
1568 }
1569
1570 static void
1571 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1572 {
1573         EvLinkDestType type;
1574
1575         type = ev_link_dest_get_dest_type (dest);
1576
1577         if (type == EV_LINK_DEST_TYPE_NAMED) {
1578                 EvLinkDest  *dest2;
1579                 const gchar *named_dest;
1580
1581                 named_dest = ev_link_dest_get_named_dest (dest);
1582                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1583                                                           named_dest);
1584                 if (dest2) {
1585                         goto_dest (view, dest2);
1586                         g_object_unref (dest2);
1587                 }
1588
1589                 return;
1590         }
1591
1592         goto_dest (view, dest);
1593 }
1594
1595 void
1596 ev_view_handle_link (EvView *view, EvLink *link)
1597 {
1598         EvLinkAction    *action = NULL;
1599         EvLinkActionType type;
1600
1601         action = ev_link_get_action (link);
1602         if (!action)
1603                 return;
1604
1605         type = ev_link_action_get_action_type (action);
1606
1607         switch (type) {
1608                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1609                         EvLinkDest *dest;
1610
1611                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1612
1613                         dest = ev_link_action_get_dest (action);
1614                         ev_view_goto_dest (view, dest);
1615                 }
1616                         break;
1617                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1618                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1619                 case EV_LINK_ACTION_TYPE_LAUNCH:
1620                 case EV_LINK_ACTION_TYPE_NAMED:
1621                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1622                         break;
1623         }
1624 }
1625
1626 gchar *
1627 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1628 {
1629         EvLinkDestType type;
1630         gchar *msg = NULL;
1631
1632         type = ev_link_dest_get_dest_type (dest);
1633
1634         switch (type) {
1635                 case EV_LINK_DEST_TYPE_NAMED: {
1636                         EvLinkDest  *dest2;
1637                         const gchar *named_dest;
1638
1639                         named_dest = ev_link_dest_get_named_dest (dest);
1640                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1641                                                                   named_dest);
1642                         if (dest2) {
1643                                 msg = ev_document_get_page_label (view->document,
1644                                                                   ev_link_dest_get_page (dest2));
1645                                 g_object_unref (dest2);
1646                         }
1647                 }
1648
1649                         break;
1650                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1651                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1652                 }
1653                         break;
1654                 default:
1655                         msg = ev_document_get_page_label (view->document,
1656                                                           ev_link_dest_get_page (dest));
1657         }
1658
1659         return msg;
1660 }
1661
1662 static char *
1663 tip_from_action_named (EvLinkAction *action)
1664 {
1665         const gchar *name = ev_link_action_get_name (action);
1666
1667         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1668                 return g_strdup (_("Go to first page"));
1669         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1670                 return g_strdup (_("Go to previous page"));
1671         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1672                 return g_strdup (_("Go to next page"));
1673         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1674                 return g_strdup (_("Go to last page"));
1675         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1676                 return g_strdup (_("Go to page"));
1677         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1678                 return g_strdup (_("Find"));
1679         }
1680
1681         return NULL;
1682 }
1683
1684 static char *
1685 tip_from_link (EvView *view, EvLink *link)
1686 {
1687         EvLinkAction *action;
1688         EvLinkActionType type;
1689         char *msg = NULL;
1690         char *page_label;
1691         const char *title;
1692
1693         action = ev_link_get_action (link);
1694         title = ev_link_get_title (link);
1695
1696         if (!action)
1697                 return title ? g_strdup (title) : NULL;
1698
1699         type = ev_link_action_get_action_type (action);
1700
1701         switch (type) {
1702                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1703                         page_label = ev_view_page_label_from_dest (view,
1704                                                                    ev_link_action_get_dest (action));
1705                         if (page_label) {
1706                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1707                                 g_free (page_label);
1708                         }
1709                         break;
1710                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1711                         if (title) {
1712                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1713                                                        ev_link_action_get_filename (action));
1714                         } else {
1715                                 msg = g_strdup_printf (_("Go to file “%s”"),
1716                                                        ev_link_action_get_filename (action));
1717                         }
1718                         break;
1719                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1720                         msg = g_strdup (ev_link_action_get_uri (action));
1721                         break;
1722                 case EV_LINK_ACTION_TYPE_LAUNCH:
1723                         msg = g_strdup_printf (_("Launch %s"),
1724                                                ev_link_action_get_filename (action));
1725                         break;
1726                 case EV_LINK_ACTION_TYPE_NAMED:
1727                         msg = tip_from_action_named (action);
1728                         break;
1729                 default:
1730                         if (title)
1731                                 msg = g_strdup (title);
1732                         break;
1733         }
1734
1735         return msg;
1736 }
1737
1738 static void
1739 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1740 {
1741         EvLink       *link;
1742         EvFormField  *field;
1743         EvAnnotation *annot = NULL;
1744
1745         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1746                 return;
1747
1748         if (view->drag_info.in_drag) {
1749                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1750                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1751                 return;
1752         }
1753
1754         if (view->scroll_info.autoscrolling) {
1755                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1756                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1757                 return;
1758         }
1759
1760         link = ev_view_get_link_at_location (view, x, y);
1761         if (link) {
1762                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1763         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1764                 if (field->is_read_only) {
1765                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1766                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1767                             view->cursor == EV_VIEW_CURSOR_DRAG)
1768                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1769                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1770                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1771                 } else {
1772                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1773                 }
1774         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1775                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1776         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1777                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1778         } else {
1779                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1780                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1781                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1782                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1783                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1784         }
1785
1786         if (link || annot)
1787                 g_object_set (view, "has-tooltip", TRUE, NULL);
1788 }
1789
1790 /*** Images ***/
1791 static EvImage *
1792 ev_view_get_image_at_location (EvView  *view,
1793                                gdouble  x,
1794                                gdouble  y)
1795 {
1796         gint page = -1;
1797         gint x_new = 0, y_new = 0;
1798         GList *image_mapping;
1799
1800         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1801                 return NULL;
1802
1803         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1804                 return NULL;
1805
1806         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1807
1808         if (image_mapping)
1809                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1810         else
1811                 return NULL;
1812 }
1813
1814 /*** Forms ***/
1815 static EvFormField *
1816 ev_view_get_form_field_at_location (EvView  *view,
1817                                     gdouble  x,
1818                                     gdouble  y)
1819 {
1820         gint page = -1;
1821         gint x_new = 0, y_new = 0;
1822         GList *forms_mapping;
1823
1824         if (!EV_IS_DOCUMENT_FORMS (view->document))
1825                 return NULL;
1826
1827         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1828                 return NULL;
1829
1830         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1831
1832         if (forms_mapping)
1833                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1834         else
1835                 return NULL;
1836 }
1837
1838 static GdkRegion *
1839 ev_view_form_field_get_region (EvView      *view,
1840                                EvFormField *field)
1841 {
1842         GdkRectangle view_area;
1843         GList       *forms_mapping;
1844
1845         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1846                                                                 field->page->index);
1847         ev_view_get_area_from_mapping (view, field->page->index,
1848                                        forms_mapping,
1849                                        field, &view_area);
1850
1851         return gdk_region_rectangle (&view_area);
1852 }
1853
1854 static gboolean
1855 ev_view_forms_remove_widgets (EvView *view)
1856 {
1857         ev_view_remove_all (view);
1858
1859         return FALSE;
1860 }
1861
1862 static void
1863 ev_view_form_field_destroy (GtkWidget *widget,
1864                             EvView    *view)
1865 {
1866         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1867 }
1868
1869 static GtkWidget *
1870 ev_view_form_field_button_create_widget (EvView      *view,
1871                                          EvFormField *field)
1872 {
1873         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1874         GdkRegion         *field_region = NULL;
1875
1876         switch (field_button->type) {
1877                 case EV_FORM_FIELD_BUTTON_PUSH:
1878                         return NULL;
1879                 case EV_FORM_FIELD_BUTTON_CHECK:
1880                 case EV_FORM_FIELD_BUTTON_RADIO: {
1881                         gboolean  state;
1882                         GList    *forms_mapping, *l;
1883
1884                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1885                                                                                field);
1886
1887                         /* FIXME: it actually depends on NoToggleToOff flags */
1888                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1889                             state && field_button->state)
1890                                 return NULL;
1891
1892                         field_region = ev_view_form_field_get_region (view, field);
1893
1894                         /* For radio buttons and checkbox buttons that are in a set
1895                          * we need to update also the region for the current selected item
1896                          */
1897                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1898                                                                                 field->page->index);
1899                         for (l = forms_mapping; l; l = g_list_next (l)) {
1900                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1901                                 GdkRegion   *button_region;
1902
1903                                 if (button->id == field->id)
1904                                         continue;
1905
1906                                 /* FIXME: only buttons in the same group should be updated */
1907                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1908                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1909                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1910                                         continue;
1911
1912                                 button_region = ev_view_form_field_get_region (view, button);
1913                                 gdk_region_union (field_region, button_region);
1914                                 gdk_region_destroy (button_region);
1915                         }
1916
1917                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1918                                                                        field, !state);
1919                         field_button->state = !state;
1920                 }
1921                         break;
1922         }
1923
1924         ev_view_reload_page (view, field->page->index, field_region);
1925         gdk_region_destroy (field_region);
1926
1927         return NULL;
1928 }
1929
1930 static void
1931 ev_view_form_field_text_save (EvView    *view,
1932                               GtkWidget *widget)
1933 {
1934         EvFormField *field;
1935
1936         if (!view->document)
1937                 return;
1938
1939         field = g_object_get_data (G_OBJECT (widget), "form-field");
1940
1941         if (field->changed) {
1942                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1943                 GdkRegion       *field_region;
1944
1945                 field_region = ev_view_form_field_get_region (view, field);
1946
1947                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1948                                                             field, field_text->text);
1949                 field->changed = FALSE;
1950                 ev_view_reload_page (view, field->page->index, field_region);
1951                 gdk_region_destroy (field_region);
1952         }
1953 }
1954
1955 static void
1956 ev_view_form_field_text_changed (GtkWidget   *widget,
1957                                  EvFormField *field)
1958 {
1959         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1960         gchar           *text = NULL;
1961
1962         if (GTK_IS_ENTRY (widget)) {
1963                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1964         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1965                 GtkTextIter start, end;
1966
1967                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1968                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1969                                                  &start, &end, FALSE);
1970         }
1971
1972         if (!field_text->text ||
1973             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1974                 g_free (field_text->text);
1975                 field_text->text = text;
1976                 field->changed = TRUE;
1977         }
1978 }
1979
1980 static GtkWidget *
1981 ev_view_form_field_text_create_widget (EvView      *view,
1982                                        EvFormField *field)
1983 {
1984         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1985         GtkWidget       *text = NULL;
1986         gchar           *txt;
1987
1988         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
1989                                                           field);
1990
1991         switch (field_text->type) {
1992                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
1993                         /* TODO */
1994                 case EV_FORM_FIELD_TEXT_NORMAL:
1995                         text = gtk_entry_new ();
1996                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
1997                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
1998                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
1999
2000                         if (txt) {
2001                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2002                                 g_free (txt);
2003                         }
2004
2005                         g_signal_connect (text, "changed",
2006                                           G_CALLBACK (ev_view_form_field_text_changed),
2007                                           field);
2008                         g_signal_connect_after (text, "activate",
2009                                                 G_CALLBACK (ev_view_form_field_destroy),
2010                                                 view);
2011                         break;
2012                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2013                         GtkTextBuffer *buffer;
2014
2015                         text = gtk_text_view_new ();
2016                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2017
2018                         if (txt) {
2019                                 gtk_text_buffer_set_text (buffer, txt, -1);
2020                                 g_free (txt);
2021                         }
2022
2023                         g_signal_connect (buffer, "changed",
2024                                           G_CALLBACK (ev_view_form_field_text_changed),
2025                                           field);
2026                 }
2027                         break;
2028         }
2029
2030         g_object_weak_ref (G_OBJECT (text),
2031                            (GWeakNotify)ev_view_form_field_text_save,
2032                            view);
2033
2034         return text;
2035 }
2036
2037 static void
2038 ev_view_form_field_choice_save (EvView    *view,
2039                                 GtkWidget *widget)
2040 {
2041         EvFormField *field;
2042
2043         if (!view->document)
2044                 return;
2045
2046         field = g_object_get_data (G_OBJECT (widget), "form-field");
2047
2048         if (field->changed) {
2049                 GList             *l;
2050                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2051                 GdkRegion         *field_region;
2052
2053                 field_region = ev_view_form_field_get_region (view, field);
2054
2055                 if (field_choice->is_editable) {
2056                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2057                                                                       field, field_choice->text);
2058                 } else {
2059                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2060                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2061                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2062                                                                                  field,
2063                                                                                  GPOINTER_TO_INT (l->data));
2064                         }
2065                 }
2066                 field->changed = FALSE;
2067                 ev_view_reload_page (view, field->page->index, field_region);
2068                 gdk_region_destroy (field_region);
2069         }
2070 }
2071
2072 static void
2073 ev_view_form_field_choice_changed (GtkWidget   *widget,
2074                                    EvFormField *field)
2075 {
2076         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2077
2078         if (GTK_IS_COMBO_BOX (widget)) {
2079                 gint item;
2080
2081                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2082                 if (!field_choice->selected_items ||
2083                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2084                         g_list_free (field_choice->selected_items);
2085                         field_choice->selected_items = NULL;
2086                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2087                                                                        GINT_TO_POINTER (item));
2088                         field->changed = TRUE;
2089                 }
2090
2091                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2092                         gchar *text;
2093
2094                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2095                         if (!field_choice->text ||
2096                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2097                                 g_free (field_choice->text);
2098                                 field_choice->text = text;
2099                                 field->changed = TRUE;
2100                         }
2101                 }
2102         } else if (GTK_IS_TREE_SELECTION (widget)) {
2103                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2104                 GtkTreeModel     *model;
2105                 GList            *items, *l;
2106
2107                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2108                 g_list_free (field_choice->selected_items);
2109                 field_choice->selected_items = NULL;
2110
2111                 for (l = items; l && l->data; l = g_list_next (l)) {
2112                         GtkTreeIter  iter;
2113                         GtkTreePath *path = (GtkTreePath *)l->data;
2114                         gint         item;
2115
2116                         gtk_tree_model_get_iter (model, &iter, path);
2117                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2118
2119                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2120                                                                        GINT_TO_POINTER (item));
2121
2122                         gtk_tree_path_free (path);
2123                 }
2124
2125                 g_list_free (items);
2126
2127                 field->changed = TRUE;
2128         }
2129 }
2130
2131 static GtkWidget *
2132 ev_view_form_field_choice_create_widget (EvView      *view,
2133                                          EvFormField *field)
2134 {
2135         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2136         GtkWidget         *choice;
2137         GtkTreeModel      *model;
2138         gint               n_items, i;
2139         gint               selected_item = 0;
2140
2141         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2142                                                                    field);
2143         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2144         for (i = 0; i < n_items; i++) {
2145                 GtkTreeIter iter;
2146                 gchar      *item;
2147
2148                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2149                                                                      field, i);
2150                 if (ev_document_forms_form_field_choice_is_item_selected (
2151                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2152                         selected_item = i;
2153                         /* FIXME: we need a get_selected_items function in poppler */
2154                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2155                                                                        GINT_TO_POINTER (i));
2156                 }
2157
2158                 if (item) {
2159                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2160                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2161                                             0, item,
2162                                             1, i,
2163                                             -1);
2164                         g_free (item);
2165                 }
2166         }
2167
2168         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2169                 GtkCellRenderer  *renderer;
2170                 GtkWidget        *tree_view;
2171                 GtkTreeSelection *selection;
2172
2173                 tree_view = gtk_tree_view_new_with_model (model);
2174                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2175
2176                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2177                 if (field_choice->multi_select) {
2178                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2179                 }
2180
2181                 /* TODO: set selected items */
2182
2183                 renderer = gtk_cell_renderer_text_new ();
2184                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2185                                                              0,
2186                                                              "choix", renderer,
2187                                                              "text", 0,
2188                                                              NULL);
2189
2190                 choice = gtk_scrolled_window_new (NULL, NULL);
2191                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2192                                                 GTK_POLICY_AUTOMATIC,
2193                                                 GTK_POLICY_AUTOMATIC);
2194                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2195                 gtk_widget_show (tree_view);
2196
2197                 g_signal_connect (selection, "changed",
2198                                   G_CALLBACK (ev_view_form_field_choice_changed),
2199                                   field);
2200                 g_signal_connect_after (selection, "changed",
2201                                         G_CALLBACK (ev_view_form_field_destroy),
2202                                         view);
2203         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2204                 gchar *text;
2205
2206                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2207                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2208                 if (text) {
2209                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2210                         g_free (text);
2211                 }
2212
2213                 g_signal_connect (choice, "changed",
2214                                   G_CALLBACK (ev_view_form_field_choice_changed),
2215                                   field);
2216                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2217                                         G_CALLBACK (ev_view_form_field_destroy),
2218                                         view);
2219         } else { /* ComboBoxText */
2220                 GtkCellRenderer *renderer;
2221
2222                 choice = gtk_combo_box_new_with_model (model);
2223                 renderer = gtk_cell_renderer_text_new ();
2224                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2225                                             renderer, TRUE);
2226                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2227                                                 renderer,
2228                                                 "text", 0,
2229                                                 NULL);
2230                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2231                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2232
2233                 g_signal_connect (choice, "changed",
2234                                   G_CALLBACK (ev_view_form_field_choice_changed),
2235                                   field);
2236                 g_signal_connect_after (choice, "changed",
2237                                         G_CALLBACK (ev_view_form_field_destroy),
2238                                         view);
2239         }
2240
2241         g_object_unref (model);
2242
2243         g_object_weak_ref (G_OBJECT (choice),
2244                            (GWeakNotify)ev_view_form_field_choice_save,
2245                            view);
2246
2247         return choice;
2248 }
2249
2250 static void
2251 ev_view_handle_form_field (EvView      *view,
2252                            EvFormField *field,
2253                            gdouble      x,
2254                            gdouble      y)
2255 {
2256         GtkWidget   *field_widget = NULL;
2257         GList       *form_field_mapping;
2258         GdkRectangle view_area;
2259
2260         if (field->is_read_only)
2261                 return;
2262
2263         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2264                 field_widget = ev_view_form_field_button_create_widget (view, field);
2265         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2266                 field_widget = ev_view_form_field_text_create_widget (view, field);
2267         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2268                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2269         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2270                 /* TODO */
2271         }
2272
2273         /* Form field doesn't require a widget */
2274         if (!field_widget)
2275                 return;
2276
2277         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2278                                 g_object_ref (field),
2279                                 (GDestroyNotify)g_object_unref);
2280
2281         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2282         ev_view_get_area_from_mapping (view, field->page->index,
2283                                        form_field_mapping,
2284                                        field, &view_area);
2285
2286         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2287         gtk_widget_show (field_widget);
2288         gtk_widget_grab_focus (field_widget);
2289 }
2290
2291 /* Annotations */
2292 static EvViewWindowChild *
2293 ev_view_get_window_child (EvView    *view,
2294                           GtkWidget *window)
2295 {
2296         GList *children = view->window_children;
2297
2298         while (children) {
2299                 EvViewWindowChild *child;
2300
2301                 child = (EvViewWindowChild *)children->data;
2302                 children = children->next;
2303
2304                 if (child->window == window)
2305                         return child;
2306         }
2307
2308         return NULL;
2309 }
2310
2311 static void
2312 ev_view_window_child_move (EvView            *view,
2313                            EvViewWindowChild *child,
2314                            gint               x,
2315                            gint               y)
2316 {
2317         child->x = x;
2318         child->y = y;
2319         gtk_window_move (GTK_WINDOW (child->window),
2320                          MAX (child->parent_x, x),
2321                          MAX (child->parent_y, y));
2322 }
2323
2324 static void
2325 ev_view_window_child_move_with_parent (EvView    *view,
2326                                        GtkWidget *window)
2327 {
2328         EvViewWindowChild *child;
2329         gint               root_x, root_y;
2330
2331         child = ev_view_get_window_child (view, window);
2332         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2333                                &root_x, &root_y);
2334         if (root_x != child->parent_x || root_y != child->parent_y) {
2335                 gint dest_x, dest_y;
2336
2337                 dest_x = child->x + (root_x - child->parent_x);
2338                 dest_y = child->y + (root_y - child->parent_y);
2339                 child->parent_x = root_x;
2340                 child->parent_y = root_y;
2341                 ev_view_window_child_move (view, child, dest_x, dest_y);
2342         }
2343
2344         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2345                 gtk_widget_show (window);
2346 }
2347
2348 static void
2349 ev_view_window_child_put (EvView    *view,
2350                           GtkWidget *window,
2351                           guint      page,
2352                           gint       x,
2353                           gint       y,
2354                           gdouble    orig_x,
2355                           gdouble    orig_y)
2356 {
2357         EvViewWindowChild *child;
2358         gint               root_x, root_y;
2359
2360         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2361                                &root_x, &root_y);
2362
2363         child = g_new0 (EvViewWindowChild, 1);
2364         child->window = window;
2365         child->page = page;
2366         child->orig_x = orig_x;
2367         child->orig_y = orig_y;
2368         child->parent_x = root_x;
2369         child->parent_y = root_y;
2370         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2371         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2372
2373         if (child->visible)
2374                 gtk_widget_show (window);
2375         else
2376                 gtk_widget_hide (window);
2377
2378         view->window_children = g_list_append (view->window_children, child);
2379 }
2380
2381 static EvViewWindowChild *
2382 ev_view_find_window_child_for_annot (EvView       *view,
2383                                      guint         page,
2384                                      EvAnnotation *annot)
2385 {
2386         GList *children = view->window_children;
2387
2388         while (children) {
2389                 EvViewWindowChild *child;
2390                 EvAnnotation      *wannot;
2391
2392                 child = (EvViewWindowChild *)children->data;
2393                 children = children->next;
2394
2395                 if (child->page != page)
2396                         continue;
2397
2398                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2399                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2400                         return child;
2401         }
2402
2403         return NULL;
2404 }
2405
2406 static void
2407 ev_view_window_children_free (EvView *view)
2408 {
2409         GList *l;
2410
2411         if (!view->window_children)
2412                 return;
2413
2414         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2415                 EvViewWindowChild *child;
2416
2417                 child = (EvViewWindowChild *)l->data;
2418                 gtk_widget_destroy (GTK_WIDGET (child->window));
2419                 g_free (child);
2420         }
2421         g_list_free (view->window_children);
2422         view->window_children = NULL;
2423         view->window_child_focus = NULL;
2424 }
2425
2426 static void
2427 annotation_window_grab_focus (GtkWidget *widget,
2428                               EvView    *view)
2429 {
2430         if (view->window_child_focus)
2431                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2432         view->window_child_focus = ev_view_get_window_child (view, widget);
2433 }
2434
2435 static void
2436 annotation_window_closed (EvAnnotationWindow *window,
2437                           EvView             *view)
2438 {
2439         EvViewWindowChild *child;
2440
2441         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2442         child->visible = FALSE;
2443 }
2444
2445 static void
2446 annotation_window_moved (EvAnnotationWindow *window,
2447                          gint                x,
2448                          gint                y,
2449                          EvView             *view)
2450 {
2451         EvViewWindowChild *child;
2452         GdkRectangle       page_area;
2453         GtkBorder          border;
2454         GdkRectangle       view_rect;
2455         EvRectangle        doc_rect;
2456         gint               width, height;
2457
2458         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2459         if (child->x == x && child->y == y)
2460                 return;
2461
2462         child->moved = TRUE;
2463         child->x = x;
2464         child->y = y;
2465
2466         /* Window has been moved by the user,
2467          * we have to set a new origin in doc coords
2468          */
2469         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2470         view_rect.x = (x - child->parent_x) + view->scroll_x;
2471         view_rect.y = (y - child->parent_y) + view->scroll_y;
2472         view_rect.width = width;
2473         view_rect.height = height;
2474
2475         get_page_extents (view, child->page, &page_area, &border);
2476         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2477         child->orig_x = doc_rect.x1;
2478         child->orig_y = doc_rect.y1;
2479 }
2480
2481 static void
2482 ev_view_annotation_save (EvView       *view,
2483                          EvAnnotation *annot)
2484 {
2485         if (!view->document)
2486                 return;
2487
2488         if (!annot->changed)
2489                 return;
2490
2491         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2492                                                          annot, annot->contents);
2493         annot->changed = FALSE;
2494 }
2495
2496 static void
2497 show_annotation_windows (EvView *view,
2498                          gint    page)
2499 {
2500         GList     *annots, *l;
2501         GtkWindow *parent;
2502
2503         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2504
2505         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2506
2507         for (l = annots; l && l->data; l = g_list_next (l)) {
2508                 EvAnnotation      *annot;
2509                 EvViewWindowChild *child;
2510                 GtkWidget         *window;
2511                 EvRectangle       *doc_rect;
2512                 GdkRectangle       view_rect;
2513
2514                 annot = ((EvMapping *)(l->data))->data;
2515
2516                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2517                         continue;
2518
2519                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2520                         continue;
2521
2522                 window = g_object_get_data (G_OBJECT (annot), "popup");
2523                 if (window) {
2524                         ev_view_window_child_move_with_parent (view, window);
2525                         continue;
2526                 }
2527
2528                 /* Look if we already have a popup for this annot */
2529                 child = ev_view_find_window_child_for_annot (view, page, annot);
2530                 window = child ? child->window : NULL;
2531                 if (window) {
2532                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2533                         g_object_set_data (G_OBJECT (annot), "popup", window);
2534                         ev_view_window_child_move_with_parent (view, window);
2535                 } else {
2536                         window = ev_annotation_window_new (annot, parent);
2537                         g_signal_connect (window, "grab_focus",
2538                                           G_CALLBACK (annotation_window_grab_focus),
2539                                           view);
2540                         g_signal_connect (window, "closed",
2541                                           G_CALLBACK (annotation_window_closed),
2542                                           view);
2543                         g_signal_connect (window, "moved",
2544                                           G_CALLBACK (annotation_window_moved),
2545                                           view);
2546                         g_object_set_data (G_OBJECT (annot), "popup", window);
2547
2548                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2549                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2550                         view_rect.x -= view->scroll_x;
2551                         view_rect.y -= view->scroll_y;
2552
2553                         ev_view_window_child_put (view, window, page,
2554                                                   view_rect.x, view_rect.y,
2555                                                   doc_rect->x1, doc_rect->y1);
2556
2557                         g_object_weak_ref (G_OBJECT (annot),
2558                                            (GWeakNotify)ev_view_annotation_save,
2559                                            view);
2560                 }
2561         }
2562 }
2563
2564 static void
2565 hide_annotation_windows (EvView *view,
2566                          gint    page)
2567 {
2568         GList *annots, *l;
2569
2570         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2571
2572         for (l = annots; l && l->data; l = g_list_next (l)) {
2573                 EvAnnotation *annot;
2574                 GtkWidget    *window;
2575
2576                 annot = ((EvMapping *)(l->data))->data;
2577
2578                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2579                         continue;
2580
2581                 window = g_object_get_data (G_OBJECT (annot), "popup");
2582                 if (window)
2583                         gtk_widget_hide (window);
2584         }
2585 }
2586
2587 static EvAnnotation *
2588 ev_view_get_annotation_at_location (EvView  *view,
2589                                     gdouble  x,
2590                                     gdouble  y)
2591 {
2592         gint page = -1;
2593         gint x_new = 0, y_new = 0;
2594         GList *annotations_mapping;
2595
2596         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2597                 return NULL;
2598
2599         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2600                 return NULL;
2601
2602         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2603
2604         if (annotations_mapping)
2605                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2606         else
2607                 return NULL;
2608 }
2609
2610 static void
2611 ev_view_handle_annotation (EvView       *view,
2612                            EvAnnotation *annot,
2613                            gdouble       x,
2614                            gdouble       y)
2615 {
2616         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2617                 GtkWidget *window;
2618
2619                 window = g_object_get_data (G_OBJECT (annot), "popup");
2620                 if (window) {
2621                         EvViewWindowChild *child;
2622
2623                         child = ev_view_get_window_child (view, window);
2624                         if (!child->visible) {
2625                                 child->visible = TRUE;
2626                                 ev_view_window_child_move (view, child, child->x, child->y);
2627                                 gtk_widget_show (window);
2628                         }
2629                 }
2630         }
2631 }
2632
2633 /*** GtkWidget implementation ***/
2634
2635 static void
2636 ev_view_size_request_continuous_dual_page (EvView         *view,
2637                                            GtkRequisition *requisition)
2638 {
2639         int max_width;
2640         gint n_pages;
2641         GtkBorder border;
2642
2643         ev_view_get_max_page_size (view, &max_width, NULL);
2644         compute_border (view, max_width, max_width, &border);
2645
2646         n_pages = ev_document_get_n_pages (view->document) + 1;
2647
2648         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2649         get_page_y_offset (view, n_pages, &requisition->height);
2650
2651         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2652                 requisition->width = 1;
2653         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2654                 requisition->width = 1;
2655                 /* FIXME: This could actually be set on one page docs or docs
2656                  * with a strange aspect ratio. */
2657                 /* requisition->height = 1;*/
2658         }
2659 }
2660
2661 static void
2662 ev_view_size_request_continuous (EvView         *view,
2663                                  GtkRequisition *requisition)
2664 {
2665         int max_width;
2666         int n_pages;
2667         GtkBorder border;
2668
2669         ev_view_get_max_page_size (view, &max_width, NULL);
2670         n_pages = ev_document_get_n_pages (view->document);
2671         compute_border (view, max_width, max_width, &border);
2672
2673         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2674         get_page_y_offset (view, n_pages, &requisition->height);
2675
2676         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2677                 requisition->width = 1;
2678         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2679                 requisition->width = 1;
2680                 /* FIXME: This could actually be set on one page docs or docs
2681                  * with a strange aspect ratio. */
2682                 /* requisition->height = 1;*/
2683         }
2684 }
2685
2686 static void
2687 ev_view_size_request_dual_page (EvView         *view,
2688                                 GtkRequisition *requisition)
2689 {
2690         GtkBorder border;
2691         gint width, height;
2692
2693         /* Find the largest of the two. */
2694         ev_page_cache_get_size (view->page_cache,
2695                                 view->current_page,
2696                                 view->rotation,
2697                                 view->scale,
2698                                 &width, &height);
2699         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2700                 gint width_2, height_2;
2701                 ev_page_cache_get_size (view->page_cache,
2702                                         view->current_page + 1,
2703                                         view->rotation,
2704                                         view->scale,
2705                                         &width_2, &height_2);
2706                 if (width_2 > width) {
2707                         width = width_2;
2708                         height = height_2;
2709                 }
2710         }
2711         compute_border (view, width, height, &border);
2712
2713         requisition->width = ((width + border.left + border.right) * 2) +
2714                 (view->spacing * 3);
2715         requisition->height = (height + border.top + border.bottom) +
2716                 (view->spacing * 2);
2717
2718         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2719                 requisition->width = 1;
2720         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2721                 requisition->width = 1;
2722                 requisition->height = 1;
2723         }
2724 }
2725
2726 static void
2727 ev_view_size_request_single_page (EvView         *view,
2728                                   GtkRequisition *requisition)
2729 {
2730         GtkBorder border;
2731         gint width, height;
2732
2733         ev_page_cache_get_size (view->page_cache,
2734                                 view->current_page,
2735                                 view->rotation,
2736                                 view->scale,
2737                                 &width, &height);
2738         compute_border (view, width, height, &border);
2739
2740         requisition->width = width + border.left + border.right + (2 * view->spacing);
2741         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2742
2743         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2744                 requisition->width = 1;
2745                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2746         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2747                 requisition->width = 1;
2748                 requisition->height = 1;
2749         }
2750 }
2751
2752 static void
2753 ev_view_size_request (GtkWidget      *widget,
2754                       GtkRequisition *requisition)
2755 {
2756         EvView *view = EV_VIEW (widget);
2757
2758         if (view->document == NULL) {
2759                 requisition->width = 1;
2760                 requisition->height = 1;
2761                 return;
2762         }
2763
2764         if (view->presentation) {
2765                 requisition->width = 1;
2766                 requisition->height = 1;
2767                 return;
2768         }
2769
2770         if (view->continuous && view->dual_page)
2771                 ev_view_size_request_continuous_dual_page (view, requisition);
2772         else if (view->continuous)
2773                 ev_view_size_request_continuous (view, requisition);
2774         else if (view->dual_page)
2775                 ev_view_size_request_dual_page (view, requisition);
2776         else
2777                 ev_view_size_request_single_page (view, requisition);
2778 }
2779
2780 static void
2781 ev_view_size_allocate (GtkWidget      *widget,
2782                        GtkAllocation  *allocation)
2783 {
2784         EvView *view = EV_VIEW (widget);
2785         GList  *children, *l;
2786         gint    root_x, root_y;
2787
2788         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2789
2790         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2791             view->sizing_mode == EV_SIZING_BEST_FIT) {
2792                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
2793                 ev_view_size_request (widget, &widget->requisition);
2794         }
2795
2796         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2797         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2798
2799         if (view->document)
2800                 view_update_range_and_current_page (view);
2801
2802         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2803         view->pending_resize = FALSE;
2804
2805         children = gtk_container_get_children (GTK_CONTAINER (widget));
2806         for (l = children; l && l->data; l = g_list_next (l)) {
2807                 EvFormField   *field;
2808                 GdkRectangle   view_area;
2809                 GList         *form_field_mapping;
2810                 GtkAllocation  child_allocation;
2811                 GtkRequisition child_requisition;
2812                 GtkWidget     *child = (GtkWidget *)l->data;
2813
2814                 field = g_object_get_data (G_OBJECT (child), "form-field");
2815                 if (!field)
2816                         continue;
2817
2818                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2819                                                                              field->page->index);
2820                 ev_view_get_area_from_mapping (view, field->page->index,
2821                                                form_field_mapping,
2822                                                field, &view_area);
2823
2824                 gtk_widget_size_request (child, &child_requisition);
2825                 if (child_requisition.width != view_area.width ||
2826                     child_requisition.height != view_area.height)
2827                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2828
2829                 gtk_container_child_get (GTK_CONTAINER (widget),
2830                                          child,
2831                                          "x", &child_allocation.x,
2832                                          "y", &child_allocation.y,
2833                                          NULL);
2834                 if (child_allocation.x != view_area.x ||
2835                     child_allocation.y != view_area.y) {
2836                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2837                 }
2838         }
2839         g_list_free (children);
2840
2841         if (view->window_children)
2842                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2843                                        &root_x, &root_y);
2844
2845         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2846                 EvViewWindowChild *child;
2847                 EvRectangle        doc_rect;
2848                 GdkRectangle       view_rect;
2849
2850                 child = (EvViewWindowChild *)l->data;
2851
2852                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2853                 if (child->moved) {
2854                         doc_rect.x1 = child->orig_x;
2855                         doc_rect.y1 = child->orig_y;
2856                 }
2857                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2858                 view_rect.x -= view->scroll_x;
2859                 view_rect.y -= view->scroll_y;
2860
2861                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2862                         child->parent_x = root_x;
2863                         child->parent_y = root_y;
2864                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2865                 }
2866         }
2867 }
2868
2869 static void
2870 ev_view_realize (GtkWidget *widget)
2871 {
2872         EvView *view = EV_VIEW (widget);
2873
2874         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2875                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2876
2877         gdk_window_set_events (view->layout.bin_window,
2878                                (gdk_window_get_events (view->layout.bin_window) |
2879                                 GDK_EXPOSURE_MASK |
2880                                 GDK_BUTTON_PRESS_MASK |
2881                                 GDK_BUTTON_RELEASE_MASK |
2882                                 GDK_SCROLL_MASK |
2883                                 GDK_KEY_PRESS_MASK |
2884                                 GDK_POINTER_MOTION_MASK |
2885                                 GDK_POINTER_MOTION_HINT_MASK |
2886                                 GDK_ENTER_NOTIFY_MASK |
2887                                 GDK_LEAVE_NOTIFY_MASK));
2888
2889         if (view->presentation)
2890                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2891         else
2892                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2893 }
2894
2895 static gboolean
2896 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2897 {
2898         EvView *view = EV_VIEW (widget);
2899         guint state;
2900
2901         state = event->state & gtk_accelerator_get_default_mod_mask ();
2902
2903         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2904                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2905
2906                 if (event->direction == GDK_SCROLL_UP ||
2907                     event->direction == GDK_SCROLL_LEFT) {
2908                         if (ev_view_can_zoom_in (view)) {
2909                                 ev_view_zoom_in (view);
2910                         }
2911                 } else {
2912                         if (ev_view_can_zoom_out (view)) {
2913                                 ev_view_zoom_out (view);
2914                         }
2915                 }
2916
2917                 return TRUE;
2918         }
2919
2920         view->jump_to_find_result = FALSE;
2921
2922         /* Shift+Wheel scrolls the in the perpendicular direction */
2923         if (state & GDK_SHIFT_MASK) {
2924                 if (event->direction == GDK_SCROLL_UP)
2925                         event->direction = GDK_SCROLL_LEFT;
2926                 else if (event->direction == GDK_SCROLL_LEFT)
2927                         event->direction = GDK_SCROLL_UP;
2928                 else if (event->direction == GDK_SCROLL_DOWN)
2929                         event->direction = GDK_SCROLL_RIGHT;
2930                 else if (event->direction == GDK_SCROLL_RIGHT)
2931                         event->direction = GDK_SCROLL_DOWN;
2932
2933                 event->state &= ~GDK_SHIFT_MASK;
2934                 state &= ~GDK_SHIFT_MASK;
2935         }
2936
2937         if (state == 0 &&
2938             (view->presentation ||
2939              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
2940                 switch (event->direction) {
2941                         case GDK_SCROLL_DOWN:
2942                         case GDK_SCROLL_RIGHT:
2943                                 ev_view_next_page (view);
2944                                 break;
2945                         case GDK_SCROLL_UP:
2946                         case GDK_SCROLL_LEFT:
2947                                 ev_view_previous_page (view);
2948                                 break;
2949                 }
2950
2951                 return TRUE;
2952         }
2953
2954         return FALSE;
2955 }
2956
2957 static EvViewSelection *
2958 find_selection_for_page (EvView *view,
2959                          gint    page)
2960 {
2961         GList *list;
2962
2963         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2964                 EvViewSelection *selection;
2965
2966                 selection = (EvViewSelection *) list->data;
2967
2968                 if (selection->page == page)
2969                         return selection;
2970         }
2971
2972         return NULL;
2973 }
2974
2975 static void
2976 draw_end_presentation_page (EvView       *view,
2977                             GdkRectangle *page_area)
2978 {
2979         PangoLayout *layout;
2980         PangoFontDescription *font_desc;
2981         gchar *markup;
2982         const gchar *text = _("End of presentation. Press Escape to exit.");
2983
2984         if (view->presentation_state != EV_PRESENTATION_END)
2985                 return;
2986
2987         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
2988         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
2989         pango_layout_set_markup (layout, markup, -1);
2990         g_free (markup);
2991
2992         font_desc = pango_font_description_new ();
2993         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
2994         pango_layout_set_font_description (layout, font_desc);
2995
2996         gtk_paint_layout (GTK_WIDGET (view)->style,
2997                           view->layout.bin_window,
2998                           GTK_WIDGET_STATE (view),
2999                           FALSE,
3000                           page_area,
3001                           GTK_WIDGET (view),
3002                           NULL,
3003                           page_area->x + 15,
3004                           page_area->y + 15,
3005                           layout);
3006
3007         pango_font_description_free (font_desc);
3008         g_object_unref (layout);
3009 }
3010
3011 static gboolean
3012 ev_view_expose_event (GtkWidget      *widget,
3013                       GdkEventExpose *event)
3014 {
3015         EvView  *view = EV_VIEW (widget);
3016         cairo_t *cr;
3017         gint     i;
3018
3019         if (view->animation) {
3020                 if (ev_transition_animation_ready (view->animation)) {
3021                         GdkRectangle page_area;
3022                         GtkBorder    border;
3023
3024                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3025                                 cr = gdk_cairo_create (view->layout.bin_window);
3026
3027                                 /* normalize to x=0, y=0 */
3028                                 cairo_translate (cr, page_area.x, page_area.y);
3029                                 page_area.x = page_area.y = 0;
3030
3031                                 ev_transition_animation_paint (view->animation, cr, page_area);
3032                                 cairo_destroy (cr);
3033                         }
3034                 }
3035
3036                 return TRUE;
3037         }
3038
3039         if (view->presentation) {
3040                 switch (view->presentation_state) {
3041                         case EV_PRESENTATION_END: {
3042                                 GdkRectangle area = {0};
3043
3044                                 area.width = widget->allocation.width;
3045                                 area.height = widget->allocation.height;
3046
3047                                 draw_end_presentation_page (view, &area);
3048                         }
3049                                 return FALSE;
3050                         case EV_PRESENTATION_BLACK:
3051                         case EV_PRESENTATION_WHITE:
3052                                 return FALSE;
3053                         case EV_PRESENTATION_NORMAL:
3054                         default:
3055                                 break;
3056                 }
3057         } else if (view->loading) {
3058                 GdkRectangle area = {0};
3059
3060                 area.width = widget->allocation.width;
3061                 area.height = widget->allocation.height;
3062
3063                 draw_loading_text (view,
3064                                    &area,
3065                                    &(event->area));
3066         }
3067
3068         if (view->document == NULL)
3069                 return FALSE;
3070
3071         cr = gdk_cairo_create (view->layout.bin_window);
3072
3073         for (i = view->start_page; i <= view->end_page; i++) {
3074                 GdkRectangle page_area;
3075                 GtkBorder border;
3076                 gboolean page_ready = TRUE;
3077
3078                 if (!get_page_extents (view, i, &page_area, &border))
3079                         continue;
3080
3081                 page_area.x -= view->scroll_x;
3082                 page_area.y -= view->scroll_y;
3083
3084                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3085
3086                 if (page_ready && view->find_pages && view->highlight_find_results)
3087                         highlight_find_results (view, i);
3088                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3089                         show_annotation_windows (view, i);
3090         }
3091
3092         cairo_destroy (cr);
3093
3094         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3095                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3096
3097         return FALSE;
3098 }
3099
3100 static gboolean
3101 ev_view_do_popup_menu (EvView *view,
3102                        gdouble x,
3103                        gdouble y)
3104 {
3105         EvLink  *link;
3106         EvImage *image;
3107
3108         image = ev_view_get_image_at_location (view, x, y);
3109         if (image) {
3110                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3111                 return TRUE;
3112         }
3113
3114         link = ev_view_get_link_at_location (view, x, y);
3115         if (link) {
3116                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3117                 return TRUE;
3118         }
3119
3120         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3121
3122         return TRUE;
3123 }
3124
3125 static gboolean
3126 ev_view_popup_menu (GtkWidget *widget)
3127 {
3128         gint x, y;
3129
3130         gtk_widget_get_pointer (widget, &x, &y);
3131         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3132 }
3133
3134 static void
3135 get_link_area (EvView       *view,
3136                gint          x,
3137                gint          y,
3138                EvLink       *link,
3139                GdkRectangle *area)
3140 {
3141         GList *link_mapping;
3142         gint   page;
3143         gint   x_offset = 0, y_offset = 0;
3144
3145         x += view->scroll_x;
3146         y += view->scroll_y;
3147
3148         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3149
3150         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3151         ev_view_get_area_from_mapping (view, page,
3152                                        link_mapping,
3153                                        link, area);
3154 }
3155
3156 static void
3157 get_annot_area (EvView       *view,
3158                gint          x,
3159                gint          y,
3160                EvAnnotation *annot,
3161                GdkRectangle *area)
3162 {
3163         GList *annots_mapping;
3164         gint   page;
3165         gint   x_offset = 0, y_offset = 0;
3166
3167         x += view->scroll_x;
3168         y += view->scroll_y;
3169
3170         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3171
3172         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3173         ev_view_get_area_from_mapping (view, page,
3174                                        annots_mapping,
3175                                        annot, area);
3176 }
3177
3178 static gboolean
3179 ev_view_query_tooltip (GtkWidget  *widget,
3180                        gint        x,
3181                        gint        y,
3182                        gboolean    keyboard_tip,
3183                        GtkTooltip *tooltip)
3184 {
3185         EvView       *view = EV_VIEW (widget);
3186         EvLink       *link;
3187         EvAnnotation *annot;
3188         gchar        *text;
3189
3190         annot = ev_view_get_annotation_at_location (view, x, y);
3191         if (annot && annot->contents) {
3192                 GdkRectangle annot_area;
3193
3194                 get_annot_area (view, x, y, annot, &annot_area);
3195                 gtk_tooltip_set_text (tooltip, annot->contents);
3196                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3197
3198                 return TRUE;
3199         }
3200
3201         link = ev_view_get_link_at_location (view, x, y);
3202         if (!link)
3203                 return FALSE;
3204
3205         text = tip_from_link (view, link);
3206         if (text && g_utf8_validate (text, -1, NULL)) {
3207                 GdkRectangle link_area;
3208
3209                 get_link_area (view, x, y, link, &link_area);
3210                 gtk_tooltip_set_text (tooltip, text);
3211                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3212         }
3213         g_free (text);
3214
3215         return TRUE;
3216 }
3217
3218 static void
3219 start_selection_for_event (EvView         *view,
3220                            GdkEventButton *event)
3221 {
3222         clear_selection (view);
3223
3224         view->selection_info.start.x = event->x + view->scroll_x;
3225         view->selection_info.start.y = event->y + view->scroll_y;
3226
3227         switch (event->type) {
3228                 case GDK_2BUTTON_PRESS:
3229                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3230                         break;
3231                 case GDK_3BUTTON_PRESS:
3232                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3233                         break;
3234                 default:
3235                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3236                         return;
3237         }
3238
3239         /* In case of WORD or LINE, compute selections now */
3240         compute_selections (view,
3241                             view->selection_info.style,
3242                             &(view->selection_info.start),
3243                             &(view->selection_info.start));
3244 }
3245
3246 static gboolean
3247 ev_view_button_press_event (GtkWidget      *widget,
3248                             GdkEventButton *event)
3249 {
3250         EvView *view = EV_VIEW (widget);
3251
3252         if (!view->document)
3253                 return FALSE;
3254
3255         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3256                 gtk_widget_grab_focus (widget);
3257         }
3258
3259         if (view->window_child_focus) {
3260                 EvAnnotationWindow *window;
3261                 EvAnnotation       *annot;
3262
3263                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3264                 annot = ev_annotation_window_get_annotation (window);
3265                 ev_annotation_window_ungrab_focus (window);
3266                 ev_view_annotation_save (view, annot);
3267                 view->window_child_focus = NULL;
3268         }
3269
3270         view->pressed_button = event->button;
3271         view->selection_info.in_drag = FALSE;
3272
3273         if (view->scroll_info.autoscrolling)
3274                 return TRUE;
3275
3276         switch (event->button) {
3277                 case 1: {
3278                         EvImage *image;
3279                         EvAnnotation *annot;
3280                         EvFormField *field;
3281
3282                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3283                                 if (event->type == GDK_3BUTTON_PRESS) {
3284                                         start_selection_for_event (view, event);
3285                                 } else if (location_in_selected_text (view,
3286                                                                event->x + view->scroll_x,
3287                                                                event->y + view->scroll_y)) {
3288                                         view->selection_info.in_drag = TRUE;
3289                                 } else {
3290                                         start_selection_for_event (view, event);
3291                                 }
3292
3293                                 gtk_widget_queue_draw (widget);
3294                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3295                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3296                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3297                                 ev_view_remove_all (view);
3298                                 ev_view_handle_form_field (view, field, event->x, event->y);
3299                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3300                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3301                                 if (view->image_dnd_info.image)
3302                                         g_object_unref (view->image_dnd_info.image);
3303                                 view->image_dnd_info.image = g_object_ref (image);
3304                                 view->image_dnd_info.in_drag = TRUE;
3305
3306                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3307                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3308                         } else {
3309                                 ev_view_remove_all (view);
3310
3311                                 if (EV_IS_SELECTION (view->document))
3312                                         start_selection_for_event (view, event);
3313                         }
3314                 }
3315                         return TRUE;
3316                 case 2:
3317                         /* use root coordinates as reference point because
3318                          * scrolling changes window relative coordinates */
3319                         view->drag_info.start.x = event->x_root;
3320                         view->drag_info.start.y = event->y_root;
3321                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3322                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3323
3324                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3325
3326                         return TRUE;
3327                 case 3:
3328                         view->scroll_info.start_y = event->y;
3329                         return ev_view_do_popup_menu (view, event->x, event->y);
3330         }
3331
3332         return FALSE;
3333 }
3334
3335 static void
3336 ev_view_remove_all (EvView *view)
3337 {
3338         GList *children, *child;
3339
3340         children = gtk_container_get_children (GTK_CONTAINER (view));
3341         for (child = children; child && child->data; child = g_list_next (child)) {
3342                 gtk_container_remove (GTK_CONTAINER (view),
3343                                       GTK_WIDGET (child->data));
3344         }
3345         g_list_free (children);
3346 }
3347
3348 /*** Drag and Drop ***/
3349 static void
3350 ev_view_drag_data_get (GtkWidget        *widget,
3351                        GdkDragContext   *context,
3352                        GtkSelectionData *selection_data,
3353                        guint             info,
3354                        guint             time)
3355 {
3356         EvView *view = EV_VIEW (widget);
3357
3358         switch (info) {
3359                 case TARGET_DND_TEXT:
3360                         if (EV_IS_SELECTION (view->document) &&
3361                             view->selection_info.selections) {
3362                                 gchar *text;
3363
3364                                 text = get_selected_text (view);
3365                                 gtk_selection_data_set_text (selection_data,
3366                                                              text,
3367                                                              strlen (text));
3368                                 g_free (text);
3369                         }
3370                         break;
3371                 case TARGET_DND_IMAGE:
3372                         if (view->image_dnd_info.image) {
3373                                 GdkPixbuf *pixbuf;
3374
3375                                 ev_document_doc_mutex_lock ();
3376                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3377                                                                        view->image_dnd_info.image);
3378                                 ev_document_doc_mutex_unlock ();
3379
3380                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3381                                 g_object_unref (pixbuf);
3382                         }
3383                         break;
3384                 case TARGET_DND_URI:
3385                         if (view->image_dnd_info.image) {
3386                                 GdkPixbuf   *pixbuf;
3387                                 const gchar *tmp_uri;
3388                                 gchar       *uris[2];
3389
3390                                 ev_document_doc_mutex_lock ();
3391                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3392                                                                        view->image_dnd_info.image);
3393                                 ev_document_doc_mutex_unlock ();
3394
3395                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3396                                 g_object_unref (pixbuf);
3397
3398                                 uris[0] = (gchar *)tmp_uri;
3399                                 uris[1] = NULL;
3400                                 gtk_selection_data_set_uris (selection_data, uris);
3401                         }
3402         }
3403 }
3404
3405 static gboolean
3406 ev_view_drag_motion (GtkWidget      *widget,
3407                      GdkDragContext *context,
3408                      gint            x,
3409                      gint            y,
3410                      guint           time)
3411 {
3412         if (gtk_drag_get_source_widget (context) == widget)
3413                 gdk_drag_status (context, 0, time);
3414         else
3415                 gdk_drag_status (context, context->suggested_action, time);
3416
3417         return TRUE;
3418 }
3419
3420 static gboolean
3421 selection_update_idle_cb (EvView *view)
3422 {
3423         compute_selections (view,
3424                             view->selection_info.style,
3425                             &view->selection_info.start,
3426                             &view->motion);
3427         view->selection_update_id = 0;
3428         return FALSE;
3429 }
3430
3431 static gboolean
3432 selection_scroll_timeout_cb (EvView *view)
3433 {
3434         gint x, y, shift = 0;
3435         GtkWidget *widget = GTK_WIDGET (view);
3436
3437         gtk_widget_get_pointer (widget, &x, &y);
3438
3439         if (y > widget->allocation.height) {
3440                 shift = (y - widget->allocation.height) / 2;
3441         } else if (y < 0) {
3442                 shift = y / 2;
3443         }
3444
3445         if (shift)
3446                 gtk_adjustment_set_value (view->vadjustment,
3447                                           CLAMP (view->vadjustment->value + shift,
3448                                           view->vadjustment->lower,
3449                                           view->vadjustment->upper -
3450                                           view->vadjustment->page_size));
3451
3452         if (x > widget->allocation.width) {
3453                 shift = (x - widget->allocation.width) / 2;
3454         } else if (x < 0) {
3455                 shift = x / 2;
3456         }
3457
3458         if (shift)
3459                 gtk_adjustment_set_value (view->hadjustment,
3460                                           CLAMP (view->hadjustment->value + shift,
3461                                           view->hadjustment->lower,
3462                                           view->hadjustment->upper -
3463                                           view->hadjustment->page_size));
3464
3465         return TRUE;
3466 }
3467
3468 static gboolean
3469 ev_view_drag_update_momentum (EvView *view)
3470 {
3471         int i;
3472         if (!view->drag_info.in_drag)
3473                 return FALSE;
3474
3475         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3476                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3477                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3478         }
3479
3480         /* Momentum is a moving average of 10ms granularity over
3481          * the last 100ms with each 10ms stored in buffer.
3482          */
3483
3484         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3485         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3486
3487         return TRUE;
3488 }
3489
3490 static gboolean
3491 ev_view_scroll_drag_release (EvView *view)
3492 {
3493         gdouble dhadj_value, dvadj_value;
3494         gdouble oldhadjustment, oldvadjustment;
3495
3496         view->drag_info.momentum.x /= 1.2;
3497         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3498
3499         dhadj_value = view->hadjustment->page_size *
3500                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3501         dvadj_value = view->vadjustment->page_size *
3502                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3503
3504         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3505         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3506
3507      /* When we reach the edges, we need either to absorb some momentum and bounce by
3508       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3509      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3510            ((oldhadjustment + dhadj_value) < 0))
3511                 view->drag_info.momentum.x = 0;
3512         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3513            ((oldvadjustment + dvadj_value) < 0))
3514                 view->drag_info.momentum.y = 0;
3515
3516         gtk_adjustment_set_value (view->hadjustment,
3517                                 MIN (oldhadjustment + dhadj_value,
3518                                 view->hadjustment->upper - view->hadjustment->page_size));
3519         gtk_adjustment_set_value (view->vadjustment,
3520                                 MIN (oldvadjustment + dvadj_value,
3521                                 view->vadjustment->upper - view->vadjustment->page_size));
3522
3523         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3524            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3525                 return FALSE;
3526         else
3527                 return TRUE;
3528 }
3529
3530 static gboolean
3531 ev_view_motion_notify_event (GtkWidget      *widget,
3532                              GdkEventMotion *event)
3533 {
3534         EvView *view = EV_VIEW (widget);
3535         gint x, y;
3536
3537         if (!view->document)
3538                 return FALSE;
3539
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         } else if (view->presentation) {
3755                 switch (event->button) {
3756                         case 1:
3757                                 ev_view_next_page (view);
3758                                 return TRUE;
3759                         case 3:
3760                                 ev_view_previous_page (view);
3761                                 return TRUE;
3762                 }
3763         }
3764
3765         return FALSE;
3766 }
3767
3768 /* Goto Window */
3769 /* Cut and paste from gtkwindow.c */
3770 static void
3771 send_focus_change (GtkWidget *widget,
3772                    gboolean   in)
3773 {
3774         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3775
3776         g_object_ref (widget);
3777
3778         if (in)
3779                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3780         else
3781                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3782
3783         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3784         fevent->focus_change.window = g_object_ref (widget->window);
3785         fevent->focus_change.in = in;
3786
3787         gtk_widget_event (widget, fevent);
3788
3789         g_object_notify (G_OBJECT (widget), "has-focus");
3790
3791         g_object_unref (widget);
3792         gdk_event_free (fevent);
3793 }
3794
3795 static void
3796 ev_view_goto_window_hide (EvView *view)
3797 {
3798         /* send focus-in event */
3799         send_focus_change (view->goto_entry, FALSE);
3800         gtk_widget_hide (view->goto_window);
3801         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3802 }
3803
3804 static gboolean
3805 ev_view_goto_window_delete_event (GtkWidget   *widget,
3806                                   GdkEventAny *event,
3807                                   EvView      *view)
3808 {
3809         ev_view_goto_window_hide (view);
3810
3811         return TRUE;
3812 }
3813
3814 static gboolean
3815 key_is_numeric (guint keyval)
3816 {
3817         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3818                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3819 }
3820
3821 static gboolean
3822 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3823                                      GdkEventKey *event,
3824                                      EvView      *view)
3825 {
3826         switch (event->keyval) {
3827                 case GDK_Escape:
3828                 case GDK_Tab:
3829                 case GDK_KP_Tab:
3830                 case GDK_ISO_Left_Tab:
3831                         ev_view_goto_window_hide (view);
3832                         return TRUE;
3833                 case GDK_Return:
3834                 case GDK_KP_Enter:
3835                 case GDK_ISO_Enter:
3836                 case GDK_BackSpace:
3837                 case GDK_Delete:
3838                         return FALSE;
3839                 default:
3840                         if (!key_is_numeric (event->keyval))
3841                                 return TRUE;
3842         }
3843
3844         return FALSE;
3845 }
3846
3847 static gboolean
3848 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3849                                         GdkEventButton *event,
3850                                         EvView         *view)
3851 {
3852         ev_view_goto_window_hide (view);
3853
3854         return TRUE;
3855 }
3856
3857 static void
3858 ev_view_goto_entry_activate (GtkEntry *entry,
3859                              EvView   *view)
3860 {
3861         const gchar *text;
3862         gint         page;
3863
3864         text = gtk_entry_get_text (entry);
3865         page = atoi (text) - 1;
3866
3867         ev_view_goto_window_hide (view);
3868
3869         if (page >= 0 && page < ev_document_get_n_pages (view->document))
3870                 ev_page_cache_set_current_page (view->page_cache, page);
3871 }
3872
3873 static void
3874 ev_view_goto_window_create (EvView *view)
3875 {
3876         GtkWidget *frame, *hbox, *toplevel, *label;
3877
3878         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3879
3880         if (view->goto_window) {
3881                 if (GTK_WINDOW (toplevel)->group)
3882                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3883                                                      GTK_WINDOW (view->goto_window));
3884                 else if (GTK_WINDOW (view->goto_window)->group)
3885                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3886                                                         GTK_WINDOW (view->goto_window));
3887                 return;
3888         }
3889
3890         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3891         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3892                                gtk_widget_get_screen (GTK_WIDGET (view)));
3893
3894         if (GTK_WINDOW (toplevel)->group)
3895                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3896                                              GTK_WINDOW (view->goto_window));
3897
3898         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3899
3900         g_signal_connect (view->goto_window, "delete_event",
3901                           G_CALLBACK (ev_view_goto_window_delete_event),
3902                           view);
3903         g_signal_connect (view->goto_window, "key_press_event",
3904                           G_CALLBACK (ev_view_goto_window_key_press_event),
3905                           view);
3906         g_signal_connect (view->goto_window, "button_press_event",
3907                           G_CALLBACK (ev_view_goto_window_button_press_event),
3908                           view);
3909
3910         frame = gtk_frame_new (NULL);
3911         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3912         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3913         gtk_widget_show (frame);
3914
3915         hbox = gtk_hbox_new (FALSE, 0);
3916         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3917         gtk_container_add (GTK_CONTAINER (frame), hbox);
3918         gtk_widget_show (hbox);
3919
3920         label = gtk_label_new(_("Jump to page:"));
3921         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3922         gtk_widget_show (label);
3923         gtk_widget_realize (label);
3924
3925         view->goto_entry = gtk_entry_new ();
3926         g_signal_connect (view->goto_entry, "activate",
3927                           G_CALLBACK (ev_view_goto_entry_activate),
3928                           view);
3929         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3930         gtk_widget_show (view->goto_entry);
3931         gtk_widget_realize (view->goto_entry);
3932 }
3933
3934 static void
3935 ev_view_goto_entry_grab_focus (EvView *view)
3936 {
3937         GtkWidgetClass *entry_parent_class;
3938
3939         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3940         (entry_parent_class->grab_focus) (view->goto_entry);
3941
3942         send_focus_change (view->goto_entry, TRUE);
3943 }
3944
3945 static void
3946 ev_view_goto_window_send_key_event (EvView   *view,
3947                                     GdkEvent *event)
3948 {
3949         GdkEventKey *new_event;
3950         GdkScreen   *screen;
3951
3952         /* Move goto window off screen */
3953         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3954         gtk_window_move (GTK_WINDOW (view->goto_window),
3955                          gdk_screen_get_width (screen) + 1,
3956                          gdk_screen_get_height (screen) + 1);
3957         gtk_widget_show (view->goto_window);
3958
3959         new_event = (GdkEventKey *) gdk_event_copy (event);
3960         g_object_unref (new_event->window);
3961         new_event->window = g_object_ref (view->goto_window->window);
3962         gtk_widget_realize (view->goto_window);
3963
3964         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3965         gdk_event_free ((GdkEvent *)new_event);
3966         gtk_widget_hide (view->goto_window);
3967 }
3968
3969 static gboolean
3970 ev_view_key_press_event (GtkWidget   *widget,
3971                          GdkEventKey *event)
3972 {
3973         EvView *view = EV_VIEW (widget);
3974         EvPresentationState current;
3975
3976         if (!view->document)
3977                 return FALSE;
3978
3979         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3980                 /* Forward key events to current focused window child */
3981                 if (view->window_child_focus) {
3982                         GdkEventKey *new_event;
3983                         gboolean     handled;
3984
3985                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3986                         g_object_unref (new_event->window);
3987                         new_event->window = g_object_ref (view->window_child_focus->window->window);
3988                         gtk_widget_realize (view->window_child_focus->window);
3989                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
3990                         gdk_event_free ((GdkEvent *)new_event);
3991
3992                         return handled;
3993                 }
3994
3995                 return FALSE;
3996         }
3997
3998         if (!view->presentation ||
3999             view->presentation_state == EV_PRESENTATION_END)
4000                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4001
4002
4003         current = view->presentation_state;
4004
4005         switch (event->keyval) {
4006                 case GDK_b:
4007                 case GDK_B:
4008                 case GDK_period:
4009                 case GDK_KP_Decimal:
4010                         view->presentation_state =
4011                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4012                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4013                         break;
4014                 case GDK_w:
4015                 case GDK_W:
4016                         view->presentation_state =
4017                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4018                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4019                         break;
4020                 default:
4021                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4022                             view->presentation_state == EV_PRESENTATION_WHITE) {
4023                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4024                         }
4025         }
4026
4027         if (current == view->presentation_state) {
4028                 if (ev_document_get_n_pages (view->document) > 1 &&
4029                     key_is_numeric (event->keyval)) {
4030                         gint x, y;
4031
4032                         ev_view_goto_window_create (view);
4033                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4034                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4035                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4036                         gtk_widget_show (view->goto_window);
4037                         ev_view_goto_entry_grab_focus (view);
4038
4039                         return TRUE;
4040                 }
4041
4042                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4043         }
4044
4045         switch (view->presentation_state) {
4046                 case EV_PRESENTATION_NORMAL:
4047                 case EV_PRESENTATION_BLACK:
4048                         gdk_window_set_background (view->layout.bin_window,
4049                                                    &widget->style->black);
4050                         break;
4051                 case EV_PRESENTATION_WHITE:
4052                         gdk_window_set_background (view->layout.bin_window,
4053                                                    &widget->style->white);
4054                         break;
4055                 default:
4056                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4057         }
4058
4059         gtk_widget_queue_draw (widget);
4060         return TRUE;
4061 }
4062
4063 static gint
4064 ev_view_focus_in (GtkWidget     *widget,
4065                   GdkEventFocus *event)
4066 {
4067         if (EV_VIEW (widget)->pixbuf_cache)
4068                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4069         gtk_widget_queue_draw (widget);
4070
4071         return FALSE;
4072 }
4073
4074 static gint
4075 ev_view_focus_out (GtkWidget     *widget,
4076                      GdkEventFocus *event)
4077 {
4078         if (EV_VIEW (widget)->goto_window)
4079                 ev_view_goto_window_hide (EV_VIEW (widget));
4080
4081         if (EV_VIEW (widget)->pixbuf_cache)
4082                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4083         gtk_widget_queue_draw (widget);
4084
4085         return FALSE;
4086 }
4087
4088 static gboolean
4089 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4090 {
4091         EvView *view = EV_VIEW (widget);
4092
4093         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4094                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4095
4096         return FALSE;
4097 }
4098
4099 static gboolean
4100 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4101 {
4102         EvView *view = EV_VIEW (widget);
4103
4104         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4105
4106         return FALSE;
4107 }
4108
4109 static void
4110 ev_view_style_set (GtkWidget *widget,
4111                    GtkStyle  *old_style)
4112 {
4113         if (EV_VIEW (widget)->pixbuf_cache)
4114                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4115
4116         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4117 }
4118
4119 /*** Drawing ***/
4120
4121 static guint32
4122 ev_gdk_color_to_rgb (const GdkColor *color)
4123 {
4124   guint32 result;
4125   result = (0xff0000 | (color->red & 0xff00));
4126   result <<= 8;
4127   result |= ((color->green & 0xff00) | (color->blue >> 8));
4128   return result;
4129 }
4130
4131 static void
4132 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4133                  const GdkRectangle *rect, guchar alpha)
4134 {
4135         GdkGC *gc;
4136         GdkPixbuf *pixbuf;
4137         GdkColor *fill_color_gdk;
4138         guint fill_color;
4139
4140         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4141         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4142
4143         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4144                                  rect->width, rect->height);
4145         gdk_pixbuf_fill (pixbuf, fill_color);
4146
4147         gdk_draw_pixbuf (window, NULL, pixbuf,
4148                          0, 0,
4149                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4150                          rect->width, rect->height,
4151                          GDK_RGB_DITHER_NONE,
4152                          0, 0);
4153
4154         g_object_unref (pixbuf);
4155
4156         gc = gdk_gc_new (window);
4157         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4158         gdk_draw_rectangle (window, gc, FALSE,
4159                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4160                             rect->width - 1,
4161                             rect->height - 1);
4162         g_object_unref (gc);
4163
4164         gdk_color_free (fill_color_gdk);
4165 }
4166
4167
4168 static void
4169 highlight_find_results (EvView *view, int page)
4170 {
4171         gint i, n_results = 0;
4172
4173         n_results = ev_view_find_get_n_results (view, page);
4174
4175         for (i = 0; i < n_results; i++) {
4176                 EvRectangle *rectangle;
4177                 GdkRectangle view_rectangle;
4178                 guchar alpha;
4179
4180                 if (i == view->find_result && page == view->current_page) {
4181                         alpha = 0x90;
4182                 } else {
4183                         alpha = 0x20;
4184                 }
4185
4186                 rectangle = ev_view_find_get_result (view, page, i);
4187                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4188                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4189                                  &view_rectangle, alpha);
4190         }
4191 }
4192
4193 static void
4194 draw_loading_text (EvView       *view,
4195                    GdkRectangle *page_area,
4196                    GdkRectangle *expose_area)
4197 {
4198         cairo_t *cr;
4199         gint     width, height;
4200
4201         if (!view->loading_text) {
4202                 const gchar *loading_text = _("Loading...");
4203                 PangoLayout *layout;
4204                 PangoFontDescription *font_desc;
4205                 PangoRectangle logical_rect;
4206                 gint target_width;
4207                 gdouble real_scale;
4208
4209                 ev_document_fc_mutex_lock ();
4210
4211                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4212
4213                 font_desc = pango_font_description_new ();
4214
4215                 /* We set the font to be 10 points, get the size, and scale appropriately */
4216                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4217                 pango_layout_set_font_description (layout, font_desc);
4218                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4219
4220                 target_width = MAX (page_area->width / 2, 1);
4221                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4222                 pango_font_description_set_size (font_desc, (int)real_scale);
4223                 pango_layout_set_font_description (layout, font_desc);
4224                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4225
4226                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4227                                                                  logical_rect.width,
4228                                                                  logical_rect.height);
4229                 cr = cairo_create (view->loading_text);
4230                 cairo_set_source_rgb (cr,
4231                                       155 / (double)255,
4232                                       155 / (double)255,
4233                                       155 / (double)255);
4234                 pango_cairo_show_layout (cr, layout);
4235                 cairo_destroy (cr);
4236
4237                 pango_font_description_free (font_desc);
4238                 g_object_unref (layout);
4239
4240                 ev_document_fc_mutex_unlock ();
4241         }
4242
4243         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4244         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4245
4246         cr = gdk_cairo_create (view->layout.bin_window);
4247         cairo_translate (cr,
4248                          page_area->x + width,
4249                          page_area->y + height);
4250         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4251         cairo_paint (cr);
4252         cairo_destroy (cr);
4253 }
4254
4255 static void
4256 draw_one_page (EvView       *view,
4257                gint          page,
4258                cairo_t      *cr,
4259                GdkRectangle *page_area,
4260                GtkBorder    *border,
4261                GdkRectangle *expose_area,
4262                gboolean     *page_ready)
4263 {
4264         GdkRectangle overlap;
4265         GdkRectangle real_page_area;
4266
4267         g_assert (view->document);
4268
4269         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4270                 return;
4271
4272         /* Render the document itself */
4273         real_page_area = *page_area;
4274
4275         real_page_area.x += border->left;
4276         real_page_area.y += border->top;
4277         real_page_area.width -= (border->left + border->right);
4278         real_page_area.height -= (border->top + border->bottom);
4279         *page_ready = TRUE;
4280
4281         if (!view->presentation) {
4282                 gint current_page;
4283
4284                 current_page = ev_page_cache_get_current_page (view->page_cache);
4285                 ev_document_misc_paint_one_page (view->layout.bin_window,
4286                                                  GTK_WIDGET (view),
4287                                                  page_area, border,
4288                                                  page == current_page);
4289         }
4290
4291         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4292                 gint             width, height;
4293                 gint             page_width, page_height;
4294                 cairo_surface_t *page_surface = NULL;
4295                 gint             selection_width, selection_height;
4296                 cairo_surface_t *selection_surface = NULL;
4297
4298                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4299
4300                 if (!page_surface) {
4301                         if (!view->presentation) {
4302                                 draw_loading_text (view,
4303                                                    &real_page_area,
4304                                                    expose_area);
4305                         }
4306
4307                         *page_ready = FALSE;
4308
4309                         return;
4310                 }
4311
4312                 ev_page_cache_get_size (view->page_cache,
4313                                         page, view->rotation,
4314                                         view->scale,
4315                                         &width, &height);
4316
4317                 page_width = cairo_image_surface_get_width (page_surface);
4318                 page_height = cairo_image_surface_get_height (page_surface);
4319
4320                 cairo_save (cr);
4321                 cairo_translate (cr, overlap.x, overlap.y);
4322
4323                 if (width != page_width || height != page_height) {
4324                         cairo_pattern_set_filter (cairo_get_source (cr),
4325                                                   CAIRO_FILTER_FAST);
4326                         cairo_scale (cr,
4327                                      (gdouble)width / page_width,
4328                                      (gdouble)height / page_height);
4329                 }
4330
4331                 cairo_surface_set_device_offset (page_surface,
4332                                                  overlap.x - real_page_area.x,
4333                                                  overlap.y - real_page_area.y);
4334                 cairo_set_source_surface (cr, page_surface, 0, 0);
4335                 cairo_paint (cr);
4336                 cairo_restore (cr);
4337
4338                 /* Get the selection pixbuf iff we have something to draw */
4339                 if (find_selection_for_page (view, page) &&
4340                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4341                         selection_surface =
4342                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4343                                                                        page,
4344                                                                        view->scale,
4345                                                                        NULL);
4346                 }
4347
4348                 if (!selection_surface) {
4349                         return;
4350                 }
4351
4352                 selection_width = cairo_image_surface_get_width (selection_surface);
4353                 selection_height = cairo_image_surface_get_height (selection_surface);
4354
4355                 cairo_save (cr);
4356                 cairo_translate (cr, overlap.x, overlap.y);
4357
4358                 if (width != selection_width || height != selection_height) {
4359                         cairo_pattern_set_filter (cairo_get_source (cr),
4360                                                   CAIRO_FILTER_FAST);
4361                         cairo_scale (cr,
4362                                      (gdouble)width / selection_width,
4363                                      (gdouble)height / selection_height);
4364                 }
4365
4366                 cairo_surface_set_device_offset (selection_surface,
4367                                                  overlap.x - real_page_area.x,
4368                                                  overlap.y - real_page_area.y);
4369                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4370                 cairo_paint (cr);
4371                 cairo_restore (cr);
4372         }
4373 }
4374
4375 /*** GObject functions ***/
4376
4377 static void
4378 ev_view_finalize (GObject *object)
4379 {
4380         EvView *view = EV_VIEW (object);
4381
4382         clear_selection (view);
4383         clear_link_selected (view);
4384
4385         if (view->image_dnd_info.image)
4386                 g_object_unref (view->image_dnd_info.image);
4387         view->image_dnd_info.image = NULL;
4388
4389         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4390 }
4391
4392 static void
4393 ev_view_destroy (GtkObject *object)
4394 {
4395         EvView *view = EV_VIEW (object);
4396
4397         if (view->document) {
4398                 g_object_unref (view->document);
4399                 view->document = NULL;
4400         }
4401
4402         if (view->pixbuf_cache) {
4403                 g_object_unref (view->pixbuf_cache);
4404                 view->pixbuf_cache = NULL;
4405         }
4406
4407         if (view->goto_window) {
4408                 gtk_widget_destroy (view->goto_window);
4409                 view->goto_window = NULL;
4410                 view->goto_entry = NULL;
4411         }
4412
4413         ev_view_window_children_free (view);
4414
4415         if (view->selection_scroll_id) {
4416             g_source_remove (view->selection_scroll_id);
4417             view->selection_scroll_id = 0;
4418         }
4419
4420         if (view->selection_update_id) {
4421             g_source_remove (view->selection_update_id);
4422             view->selection_update_id = 0;
4423         }
4424
4425         if (view->loading_text) {
4426                 cairo_surface_destroy (view->loading_text);
4427                 view->loading_text = NULL;
4428         }
4429
4430         if (view->scroll_info.timeout_id) {
4431             g_source_remove (view->scroll_info.timeout_id);
4432             view->scroll_info.timeout_id = 0;
4433         }
4434
4435         if (view->drag_info.drag_timeout_id) {
4436                 g_source_remove (view->drag_info.drag_timeout_id);
4437                 view->drag_info.drag_timeout_id = 0;
4438         }
4439
4440         if (view->drag_info.release_timeout_id) {
4441                 g_source_remove (view->drag_info.release_timeout_id);
4442                 view->drag_info.release_timeout_id = 0;
4443         }
4444
4445         ev_view_presentation_transition_stop (view);
4446
4447         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4448
4449         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4450 }
4451
4452 static void
4453 ev_view_set_property (GObject      *object,
4454                       guint         prop_id,
4455                       const GValue *value,
4456                       GParamSpec   *pspec)
4457 {
4458         EvView *view = EV_VIEW (object);
4459
4460         switch (prop_id) {
4461                 case PROP_CONTINUOUS:
4462                         ev_view_set_continuous (view, g_value_get_boolean (value));
4463                         break;
4464                 case PROP_DUAL_PAGE:
4465                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4466                         break;
4467                 case PROP_FULLSCREEN:
4468                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4469                         break;
4470                 case PROP_PRESENTATION:
4471                         ev_view_set_presentation (view, g_value_get_boolean (value));
4472                         break;
4473                 case PROP_SIZING_MODE:
4474                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4475                         break;
4476                 case PROP_ZOOM:
4477                         ev_view_set_zoom (view, g_value_get_double (value), FALSE);
4478                         break;
4479                 case PROP_ROTATION:
4480                         ev_view_set_rotation (view, g_value_get_int (value));
4481                         break;
4482                 default:
4483                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4484         }
4485 }
4486
4487 static AtkObject *
4488 ev_view_get_accessible (GtkWidget *widget)
4489 {
4490         static gboolean first_time = TRUE;
4491
4492         if (first_time) {
4493                 AtkObjectFactory *factory;
4494                 AtkRegistry *registry;
4495                 GType derived_type;
4496                 GType derived_atk_type;
4497
4498                 /*
4499                  * Figure out whether accessibility is enabled by looking at the
4500                  * type of the accessible object which would be created for
4501                  * the parent type of EvView.
4502                  */
4503                 derived_type = g_type_parent (EV_TYPE_VIEW);
4504
4505                 registry = atk_get_default_registry ();
4506                 factory = atk_registry_get_factory (registry,
4507                                                     derived_type);
4508                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4509                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4510                         atk_registry_set_factory_type (registry,
4511                                                        EV_TYPE_VIEW,
4512                                                        ev_view_accessible_factory_get_type ());
4513                 first_time = FALSE;
4514         }
4515         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4516 }
4517
4518 static void
4519 ev_view_get_property (GObject *object,
4520                       guint prop_id,
4521                       GValue *value,
4522                       GParamSpec *pspec)
4523 {
4524         EvView *view = EV_VIEW (object);
4525
4526         switch (prop_id) {
4527                 case PROP_CONTINUOUS:
4528                         g_value_set_boolean (value, view->continuous);
4529                         break;
4530                 case PROP_DUAL_PAGE:
4531                         g_value_set_boolean (value, view->dual_page);
4532                         break;
4533                 case PROP_FULLSCREEN:
4534                         g_value_set_boolean (value, view->fullscreen);
4535                         break;
4536                 case PROP_PRESENTATION:
4537                         g_value_set_boolean (value, view->presentation);
4538                         break;
4539                 case PROP_SIZING_MODE:
4540                         g_value_set_enum (value, view->sizing_mode);
4541                         break;
4542                 case PROP_ZOOM:
4543                         g_value_set_double (value, view->scale);
4544                         break;
4545                 case PROP_ROTATION:
4546                         g_value_set_int (value, view->rotation);
4547                         break;
4548                 case PROP_HAS_SELECTION:
4549                         g_value_set_boolean (value,
4550                                              view->selection_info.selections != NULL);
4551                         break;
4552                 default:
4553                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4554         }
4555 }
4556
4557 static void
4558 ev_view_class_init (EvViewClass *class)
4559 {
4560         GObjectClass *object_class = G_OBJECT_CLASS (class);
4561         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4562         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4563         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4564         GtkBindingSet *binding_set;
4565
4566         object_class->finalize = ev_view_finalize;
4567         object_class->set_property = ev_view_set_property;
4568         object_class->get_property = ev_view_get_property;
4569
4570         widget_class->expose_event = ev_view_expose_event;
4571         widget_class->button_press_event = ev_view_button_press_event;
4572         widget_class->motion_notify_event = ev_view_motion_notify_event;
4573         widget_class->button_release_event = ev_view_button_release_event;
4574         widget_class->key_press_event = ev_view_key_press_event;
4575         widget_class->focus_in_event = ev_view_focus_in;
4576         widget_class->focus_out_event = ev_view_focus_out;
4577         widget_class->get_accessible = ev_view_get_accessible;
4578         widget_class->size_request = ev_view_size_request;
4579         widget_class->size_allocate = ev_view_size_allocate;
4580         widget_class->realize = ev_view_realize;
4581         widget_class->scroll_event = ev_view_scroll_event;
4582         widget_class->enter_notify_event = ev_view_enter_notify_event;
4583         widget_class->leave_notify_event = ev_view_leave_notify_event;
4584         widget_class->style_set = ev_view_style_set;
4585         widget_class->drag_data_get = ev_view_drag_data_get;
4586         widget_class->drag_motion = ev_view_drag_motion;
4587         widget_class->popup_menu = ev_view_popup_menu;
4588         widget_class->query_tooltip = ev_view_query_tooltip;
4589
4590         gtk_object_class->destroy = ev_view_destroy;
4591
4592         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4593
4594         class->binding_activated = ev_view_scroll;
4595
4596         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4597                          G_TYPE_FROM_CLASS (object_class),
4598                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4599                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4600                          NULL, NULL,
4601                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4602                          G_TYPE_NONE, 2,
4603                          GTK_TYPE_SCROLL_TYPE,
4604                          G_TYPE_BOOLEAN);
4605
4606         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
4607                          G_TYPE_FROM_CLASS (object_class),
4608                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4609                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
4610                          NULL, NULL,
4611                          g_cclosure_marshal_VOID__VOID,
4612                          G_TYPE_NONE, 0, G_TYPE_NONE);
4613         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4614                          G_TYPE_FROM_CLASS (object_class),
4615                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4616                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4617                          NULL, NULL,
4618                          g_cclosure_marshal_VOID__OBJECT,
4619                          G_TYPE_NONE, 1,
4620                          G_TYPE_OBJECT);
4621         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4622                          G_TYPE_FROM_CLASS (object_class),
4623                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4624                          G_STRUCT_OFFSET (EvViewClass, external_link),
4625                          NULL, NULL,
4626                          g_cclosure_marshal_VOID__OBJECT,
4627                          G_TYPE_NONE, 1,
4628                          G_TYPE_OBJECT);
4629         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4630                          G_TYPE_FROM_CLASS (object_class),
4631                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4632                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4633                          NULL, NULL,
4634                          g_cclosure_marshal_VOID__OBJECT,
4635                          G_TYPE_NONE, 1,
4636                          G_TYPE_OBJECT);
4637
4638
4639         g_object_class_install_property (object_class,
4640                                          PROP_CONTINUOUS,
4641                                          g_param_spec_boolean ("continuous",
4642                                                                "Continuous",
4643                                                                "Continuous scrolling mode",
4644                                                                TRUE,
4645                                                                G_PARAM_READWRITE));
4646
4647         g_object_class_install_property (object_class,
4648                                          PROP_DUAL_PAGE,
4649                                          g_param_spec_boolean ("dual-page",
4650                                                                "Dual Page",
4651                                                                "Two pages visible at once",
4652                                                                FALSE,
4653                                                                G_PARAM_READWRITE));
4654         g_object_class_install_property (object_class,
4655                                          PROP_FULLSCREEN,
4656                                          g_param_spec_boolean ("fullscreen",
4657                                                                "Full Screen",
4658                                                                "Draw page in a fullscreen fashion",
4659                                                                FALSE,
4660                                                                G_PARAM_READWRITE));
4661         g_object_class_install_property (object_class,
4662                                          PROP_PRESENTATION,
4663                                          g_param_spec_boolean ("presentation",
4664                                                                "Presentation",
4665                                                                "Draw page in presentation mode",
4666                                                                TRUE,
4667                                                                G_PARAM_READWRITE));
4668
4669         g_object_class_install_property (object_class,
4670                                          PROP_SIZING_MODE,
4671                                          g_param_spec_enum ("sizing-mode",
4672                                                             "Sizing Mode",
4673                                                             "Sizing Mode",
4674                                                             EV_TYPE_SIZING_MODE,
4675                                                             EV_SIZING_FIT_WIDTH,
4676                                                             G_PARAM_READWRITE));
4677
4678         g_object_class_install_property (object_class,
4679                                          PROP_ZOOM,
4680                                          g_param_spec_double ("zoom",
4681                                                               "Zoom factor",
4682                                                               "Zoom factor",
4683                                                               0,
4684                                                               G_MAXDOUBLE,
4685                                                               1.0,
4686                                                               G_PARAM_READWRITE));
4687         g_object_class_install_property (object_class,
4688                                          PROP_ROTATION,
4689                                          g_param_spec_double ("rotation",
4690                                                               "Rotation",
4691                                                               "Rotation",
4692                                                               0,
4693                                                               360,
4694                                                               0,
4695                                                               G_PARAM_READWRITE));
4696         g_object_class_install_property (object_class,
4697                                          PROP_HAS_SELECTION,
4698                                          g_param_spec_boolean ("has-selection",
4699                                                                "Has selection",
4700                                                                "The view has selections",
4701                                                                FALSE,
4702                                                                G_PARAM_READABLE));
4703
4704         binding_set = gtk_binding_set_by_class (class);
4705
4706         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4707         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4708         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4709         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4710         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4711         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4712         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4713         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4714         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4715                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4716         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4717                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4718         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4719                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4720         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4721                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4722
4723 }
4724
4725 static void
4726 ev_view_init (EvView *view)
4727 {
4728         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4729
4730         view->start_page = -1;
4731         view->end_page = -1;
4732         view->spacing = 5;
4733         view->scale = 1.0;
4734         view->current_page = 0;
4735         view->pressed_button = -1;
4736         view->cursor = EV_VIEW_CURSOR_NORMAL;
4737         view->drag_info.in_drag = FALSE;
4738         view->scroll_info.autoscrolling = FALSE;
4739         view->selection_info.selections = NULL;
4740         view->selection_info.in_selection = FALSE;
4741         view->selection_info.in_drag = FALSE;
4742         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4743         view->continuous = TRUE;
4744         view->dual_page = FALSE;
4745         view->presentation = FALSE;
4746         view->presentation_state = EV_PRESENTATION_NORMAL;
4747         view->fullscreen = FALSE;
4748         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4749         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4750         view->jump_to_find_result = TRUE;
4751         view->highlight_find_results = FALSE;
4752
4753         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4754         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4755 }
4756
4757 /*** Callbacks ***/
4758
4759 static void
4760 ev_view_change_page (EvView *view,
4761                      gint    new_page,
4762                      gboolean start_transition)
4763 {
4764         gint x, y;
4765
4766         view->current_page = new_page;
4767         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4768
4769         if (view->presentation && start_transition)
4770                 ev_view_presentation_transition_start (view);
4771
4772         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4773         ev_view_handle_cursor_over_xy (view, x, y);
4774
4775         gtk_widget_queue_resize (GTK_WIDGET (view));
4776 }
4777
4778 static void
4779 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4780                                      EvView                *view)
4781 {
4782         g_object_unref (view->animation);
4783         view->animation = NULL;
4784         ev_view_change_page (view, view->current_page, TRUE);
4785 }
4786
4787 /**
4788  * ev_view_transition_animation_cancel:
4789  * @animation: Animation to finish
4790  * @view: An EvView
4791  *
4792  * Does almost the same as cancel, but without scheduling the transition.
4793  */
4794
4795 static void
4796 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4797                                      EvView                *view)
4798 {
4799         g_object_unref (view->animation);
4800         view->animation = NULL;
4801         ev_view_change_page (view, view->current_page, FALSE);
4802 }
4803
4804 static void
4805 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4806                                     gdouble                progress,
4807                                     EvView                *view)
4808 {
4809         gtk_widget_queue_draw (GTK_WIDGET (view));
4810 }
4811
4812 static void
4813 ev_view_presentation_animation_start (EvView *view,
4814                                       int     new_page)
4815 {
4816         EvTransitionEffect *effect = NULL;
4817         cairo_surface_t *surface;
4818
4819         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4820                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4821                                                             view->current_page);
4822         if (!effect)
4823                 return;
4824
4825         view->animation = ev_transition_animation_new (effect);
4826
4827         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4828         ev_transition_animation_set_origin_surface (view->animation, surface);
4829         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4830         if (surface)
4831                 ev_transition_animation_set_dest_surface (view->animation, surface);
4832
4833         g_signal_connect (view->animation, "frame",
4834                           G_CALLBACK (ev_view_transition_animation_frame), view);
4835         g_signal_connect (view->animation, "finished",
4836                           G_CALLBACK (ev_view_transition_animation_finish), view);
4837 }
4838
4839 static void
4840 job_finished_cb (EvPixbufCache *pixbuf_cache,
4841                  GdkRegion     *region,
4842                  EvView        *view)
4843 {
4844         if (view->animation) {
4845                 cairo_surface_t *surface;
4846
4847                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4848                 ev_transition_animation_set_dest_surface (view->animation, surface);
4849         }
4850
4851         if (region) {
4852                 gdk_window_invalidate_region (view->layout.bin_window,
4853                                               region, TRUE);
4854         } else {
4855                 gtk_widget_queue_draw (GTK_WIDGET (view));
4856         }
4857 }
4858
4859 static void
4860 page_changed_cb (EvPageCache *page_cache,
4861                  int          new_page,
4862                  EvView      *view)
4863 {
4864         if (view->current_page != new_page) {
4865                 if (view->presentation)
4866                         ev_view_presentation_animation_start (view, new_page);
4867
4868                 ev_view_change_page (view, new_page, TRUE);
4869         } else {
4870                 gtk_widget_queue_draw (GTK_WIDGET (view));
4871         }
4872
4873         view->find_result = 0;
4874 }
4875
4876 static void
4877 on_adjustment_value_changed (GtkAdjustment *adjustment,
4878                              EvView        *view)
4879 {
4880         int dx = 0, dy = 0;
4881         gint x, y;
4882         GList *children, *l;
4883
4884         if (! GTK_WIDGET_REALIZED (view))
4885                 return;
4886
4887         if (view->hadjustment) {
4888                 dx = view->scroll_x - (int) view->hadjustment->value;
4889                 view->scroll_x = (int) view->hadjustment->value;
4890         } else {
4891                 view->scroll_x = 0;
4892         }
4893
4894         if (view->vadjustment) {
4895                 dy = view->scroll_y - (int) view->vadjustment->value;
4896                 view->scroll_y = (int) view->vadjustment->value;
4897         } else {
4898                 view->scroll_y = 0;
4899         }
4900
4901         children = gtk_container_get_children (GTK_CONTAINER (view));
4902         for (l = children; l && l->data; l = g_list_next (l)) {
4903                 gint       child_x, child_y;
4904                 GtkWidget *child = (GtkWidget *)l->data;
4905
4906                 gtk_container_child_get (GTK_CONTAINER (view),
4907                                          child,
4908                                          "x", &child_x,
4909                                          "y", &child_y,
4910                                          NULL);
4911                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4912         }
4913         g_list_free (children);
4914
4915         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4916                 EvViewWindowChild *child;
4917
4918                 child = (EvViewWindowChild *)l->data;
4919
4920                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4921         }
4922
4923         if (view->pending_resize)
4924                 gtk_widget_queue_draw (GTK_WIDGET (view));
4925         else
4926                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4927
4928         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4929         ev_view_handle_cursor_over_xy (view, x, y);
4930
4931         if (view->document)
4932                 view_update_range_and_current_page (view);
4933 }
4934
4935 GtkWidget*
4936 ev_view_new (void)
4937 {
4938         GtkWidget *view;
4939
4940         view = g_object_new (EV_TYPE_VIEW, NULL);
4941
4942         return view;
4943 }
4944
4945 static void
4946 setup_caches (EvView *view)
4947 {
4948         view->page_cache = ev_page_cache_get (view->document);
4949         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4950         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
4951         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4952         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4953         page_changed_cb (view->page_cache,
4954                          ev_page_cache_get_current_page (view->page_cache),
4955                          view);
4956 }
4957
4958 static void
4959 clear_caches (EvView *view)
4960 {
4961         if (view->pixbuf_cache) {
4962                 g_object_unref (view->pixbuf_cache);
4963                 view->pixbuf_cache = NULL;
4964         }
4965
4966         if (view->page_cache) {
4967                 view->page_cache = NULL;
4968         }
4969 }
4970
4971 void
4972 ev_view_set_loading (EvView       *view,
4973                      gboolean      loading)
4974 {
4975         view->loading = loading;
4976         gtk_widget_queue_draw (GTK_WIDGET (view));
4977 }
4978
4979 static gboolean
4980 ev_view_autoscroll_cb (EvView *view)
4981 {
4982         gdouble speed, value;
4983
4984         /* If the user stops autoscrolling, autoscrolling will be
4985          * set to false but the timeout will continue; stop the timeout: */
4986         if (!view->scroll_info.autoscrolling) {
4987                 view->scroll_info.timeout_id = 0;
4988                 return FALSE;
4989         }
4990
4991         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4992                 (view->scroll_info.last_y < view->scroll_info.start_y))
4993                 return TRUE;
4994
4995         /* Replace 100 with your speed of choice: The lower the faster.
4996          * Replace 3 with another speed of choice: The higher, the faster it accelerated
4997          *      based on the distance of the starting point from the mouse
4998          * (All also effected by the timeout interval of this callback) */
4999
5000         if (view->scroll_info.start_y > view->scroll_info.last_y)
5001                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5002         else
5003                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5004
5005         value = gtk_adjustment_get_value (view->vadjustment);
5006         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5007         gtk_adjustment_set_value (view->vadjustment, value);
5008
5009         return TRUE;
5010
5011 }
5012
5013 void
5014 ev_view_autoscroll_start (EvView *view)
5015 {
5016         gint x, y;
5017
5018         g_return_if_fail (EV_IS_VIEW (view));
5019
5020         if (view->scroll_info.autoscrolling)
5021                 return;
5022
5023         view->scroll_info.autoscrolling = TRUE;
5024         view->scroll_info.timeout_id =
5025                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5026                                view);
5027
5028         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5029         ev_view_handle_cursor_over_xy (view, x, y);
5030 }
5031
5032 void
5033 ev_view_autoscroll_stop (EvView *view)
5034 {
5035         gint x, y;
5036
5037         g_return_if_fail (EV_IS_VIEW (view));
5038
5039         if (!view->scroll_info.autoscrolling)
5040                 return;
5041
5042         view->scroll_info.autoscrolling = FALSE;
5043         if (view->scroll_info.timeout_id) {
5044                 g_source_remove (view->scroll_info.timeout_id);
5045                 view->scroll_info.timeout_id = 0;
5046         }
5047
5048         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5049         ev_view_handle_cursor_over_xy (view, x, y);
5050 }
5051
5052 void
5053 ev_view_set_document (EvView     *view,
5054                       EvDocument *document)
5055 {
5056         g_return_if_fail (EV_IS_VIEW (view));
5057
5058         view->loading = FALSE;
5059
5060         if (document != view->document) {
5061                 clear_caches (view);
5062
5063                 if (view->document) {
5064                         g_object_unref (view->document);
5065                         view->page_cache = NULL;
5066                 }
5067
5068                 view->document = document;
5069                 view->find_result = 0;
5070
5071                 if (view->document) {
5072                         g_object_ref (view->document);
5073                         setup_caches (view);
5074                 }
5075
5076                 view_update_range_and_current_page (view);
5077
5078                 gtk_widget_queue_resize (GTK_WIDGET (view));
5079         }
5080 }
5081
5082 static void
5083 ev_view_reload_page (EvView    *view,
5084                      gint       page,
5085                      GdkRegion *region)
5086 {
5087         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5088                                      region,
5089                                      page,
5090                                      view->rotation,
5091                                      view->scale);
5092 }
5093
5094 void
5095 ev_view_reload (EvView *view)
5096 {
5097         ev_pixbuf_cache_clear (view->pixbuf_cache);
5098         view_update_range_and_current_page (view);
5099 }
5100
5101 /*** Zoom and sizing mode ***/
5102
5103 #define EPSILON 0.0000001
5104 void
5105 ev_view_set_zoom (EvView   *view,
5106                   double    factor,
5107                   gboolean  relative)
5108 {
5109         double scale;
5110
5111         if (relative)
5112                 scale = view->scale * factor;
5113         else
5114                 scale = factor;
5115
5116         scale = CLAMP (scale,
5117                        view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0,
5118                        view->max_scale);
5119
5120         if (scale == view->scale)
5121                 return;
5122
5123         if (ABS (view->scale - scale) < EPSILON)
5124                 return;
5125
5126         if (view->loading_text) {
5127                 cairo_surface_destroy (view->loading_text);
5128                 view->loading_text = NULL;
5129         }
5130
5131         view->scale = scale;
5132         view->pending_resize = TRUE;
5133
5134         gtk_widget_queue_resize (GTK_WIDGET (view));
5135
5136         g_object_notify (G_OBJECT (view), "zoom");
5137 }
5138
5139 double
5140 ev_view_get_zoom (EvView *view)
5141 {
5142         return view->scale;
5143 }
5144
5145 void
5146 ev_view_set_screen_dpi (EvView  *view,
5147                         gdouble  dpi)
5148 {
5149         g_return_if_fail (EV_IS_VIEW (view));
5150         g_return_if_fail (dpi > 0);
5151
5152         view->dpi = dpi;
5153         view->min_scale = MIN_SCALE * dpi / 72.0;
5154         view->max_scale = MAX_SCALE * dpi / 72.0;
5155 }
5156
5157 gboolean
5158 ev_view_get_continuous (EvView *view)
5159 {
5160         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5161
5162         return view->continuous;
5163 }
5164
5165 void
5166 ev_view_set_continuous (EvView   *view,
5167                         gboolean  continuous)
5168 {
5169         g_return_if_fail (EV_IS_VIEW (view));
5170
5171         continuous = continuous != FALSE;
5172
5173         if (view->continuous != continuous) {
5174                 view->continuous = continuous;
5175                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5176                 gtk_widget_queue_resize (GTK_WIDGET (view));
5177         }
5178
5179         g_object_notify (G_OBJECT (view), "continuous");
5180 }
5181
5182 gboolean
5183 ev_view_get_dual_page (EvView *view)
5184 {
5185         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5186
5187         return view->dual_page;
5188 }
5189
5190 void
5191 ev_view_set_dual_page (EvView   *view,
5192                        gboolean  dual_page)
5193 {
5194         g_return_if_fail (EV_IS_VIEW (view));
5195
5196         dual_page = dual_page != FALSE;
5197
5198         if (view->dual_page == dual_page)
5199                 return;
5200
5201         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5202         view->dual_page = dual_page;
5203         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5204          * preload_cache_size to be 2 if dual_page is set.
5205          */
5206         gtk_widget_queue_resize (GTK_WIDGET (view));
5207
5208         g_object_notify (G_OBJECT (view), "dual-page");
5209 }
5210
5211 void
5212 ev_view_set_fullscreen (EvView   *view,
5213                          gboolean  fullscreen)
5214 {
5215         g_return_if_fail (EV_IS_VIEW (view));
5216
5217         fullscreen = fullscreen != FALSE;
5218
5219         if (view->fullscreen == fullscreen)
5220                 return;
5221
5222         view->fullscreen = fullscreen;
5223         gtk_widget_queue_resize (GTK_WIDGET (view));
5224
5225         g_object_notify (G_OBJECT (view), "fullscreen");
5226 }
5227
5228 gboolean
5229 ev_view_get_fullscreen (EvView *view)
5230 {
5231         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5232
5233         return view->fullscreen;
5234 }
5235
5236 void
5237 ev_view_set_presentation (EvView   *view,
5238                           gboolean  presentation)
5239 {
5240         g_return_if_fail (EV_IS_VIEW (view));
5241
5242         presentation = presentation != FALSE;
5243
5244         if (view->presentation == presentation)
5245                 return;
5246
5247         if (!presentation)
5248                 view->presentation_state = EV_PRESENTATION_NORMAL;
5249
5250         view->presentation = presentation;
5251         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5252
5253         if (presentation) {
5254                 view->sizing_mode_saved = view->sizing_mode;
5255                 view->scale_saved = view->scale;
5256                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5257         } else {
5258                 ev_view_set_sizing_mode (view, view->sizing_mode_saved);
5259                 ev_view_set_zoom (view, view->scale_saved, FALSE);
5260         }
5261
5262         gtk_widget_queue_resize (GTK_WIDGET (view));
5263
5264         if (presentation)
5265                 ev_view_presentation_transition_start (view);
5266         else {
5267                 ev_view_presentation_transition_stop (view);
5268
5269                 if (view->animation) {
5270                         /* stop any running animation */
5271                         ev_view_transition_animation_cancel (view->animation, view);
5272                 }
5273         }
5274
5275         if (GTK_WIDGET_REALIZED (view)) {
5276                 if (view->presentation)
5277                         gdk_window_set_background (view->layout.bin_window,
5278                                                    &GTK_WIDGET (view)->style->black);
5279                 else
5280                         gdk_window_set_background (view->layout.bin_window,
5281                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5282         }
5283
5284         g_object_notify (G_OBJECT (view), "presentation");
5285 }
5286
5287 gboolean
5288 ev_view_get_presentation (EvView *view)
5289 {
5290         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5291
5292         return view->presentation;
5293 }
5294
5295 static gboolean
5296 transition_next_page (EvView *view)
5297 {
5298         ev_view_next_page (view);
5299
5300         return FALSE;
5301 }
5302
5303 static void
5304 ev_view_presentation_transition_stop (EvView *view)
5305 {
5306         if (view->trans_timeout_id > 0)
5307                 g_source_remove (view->trans_timeout_id);
5308         view->trans_timeout_id = 0;
5309 }
5310
5311 static void
5312 ev_view_presentation_transition_start (EvView *view)
5313 {
5314         gdouble duration;
5315
5316         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5317                 return;
5318
5319         ev_view_presentation_transition_stop (view);
5320
5321         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5322                                                              view->current_page);
5323         if (duration > 0) {
5324                 view->trans_timeout_id =
5325                         g_timeout_add_seconds (duration,
5326                                                (GSourceFunc) transition_next_page,
5327                                                view);
5328         }
5329 }
5330
5331 void
5332 ev_view_set_sizing_mode (EvView       *view,
5333                          EvSizingMode  sizing_mode)
5334 {
5335         g_return_if_fail (EV_IS_VIEW (view));
5336
5337         if (view->sizing_mode == sizing_mode)
5338                 return;
5339
5340         view->sizing_mode = sizing_mode;
5341         gtk_widget_queue_resize (GTK_WIDGET (view));
5342
5343         g_object_notify (G_OBJECT (view), "sizing-mode");
5344 }
5345
5346 EvSizingMode
5347 ev_view_get_sizing_mode (EvView *view)
5348 {
5349         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5350
5351         return view->sizing_mode;
5352 }
5353
5354 gboolean
5355 ev_view_can_zoom_in (EvView *view)
5356 {
5357         return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
5358 }
5359
5360 gboolean
5361 ev_view_can_zoom_out (EvView *view)
5362 {
5363         return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
5364 }
5365
5366 void
5367 ev_view_zoom_in (EvView *view)
5368 {
5369         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5370
5371         if (view->presentation)
5372                 return;
5373
5374         view->pending_scroll = SCROLL_TO_CENTER;
5375         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
5376 }
5377
5378 void
5379 ev_view_zoom_out (EvView *view)
5380 {
5381         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5382
5383         if (view->presentation)
5384                 return;
5385
5386         view->pending_scroll = SCROLL_TO_CENTER;
5387         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
5388 }
5389
5390 void
5391 ev_view_rotate_right (EvView *view)
5392 {
5393         int rotation = view->rotation + 90;
5394
5395         if (rotation >= 360) {
5396                 rotation -= 360;
5397         }
5398
5399         ev_view_set_rotation (view, rotation);
5400 }
5401
5402 void
5403 ev_view_rotate_left (EvView *view)
5404 {
5405         int rotation = view->rotation - 90;
5406
5407         if (rotation < 0) {
5408                 rotation += 360;
5409         }
5410
5411         ev_view_set_rotation (view, rotation);
5412 }
5413
5414 void
5415 ev_view_set_rotation (EvView *view, int rotation)
5416 {
5417         view->rotation = rotation;
5418
5419         if (view->pixbuf_cache) {
5420                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5421                 gtk_widget_queue_resize (GTK_WIDGET (view));
5422         }
5423
5424         if (rotation != 0)
5425                 clear_selection (view);
5426
5427         g_object_notify (G_OBJECT (view), "rotation");
5428 }
5429
5430 int
5431 ev_view_get_rotation (EvView *view)
5432 {
5433         return view->rotation;
5434 }
5435
5436 static double
5437 zoom_for_size_fit_width (gdouble doc_width,
5438                          gdouble doc_height,
5439                          int     target_width,
5440                          int     target_height,
5441                          int     vsb_width)
5442 {
5443         double scale;
5444
5445         scale = (double)target_width / doc_width;
5446
5447         if (doc_height * scale > target_height)
5448                 scale = (double) (target_width - vsb_width) / doc_width;
5449
5450         return scale;
5451 }
5452
5453 static double
5454 zoom_for_size_fit_height (gdouble doc_width,
5455                           gdouble doc_height,
5456                           int     target_width,
5457                           int     target_height,
5458                           int     vsb_height)
5459 {
5460         double scale;
5461
5462         scale = (double)target_height / doc_height;
5463
5464         if (doc_width * scale > target_width)
5465                 scale = (double) (target_height - vsb_height) / doc_height;
5466
5467         return scale;
5468 }
5469
5470 static double
5471 zoom_for_size_best_fit (gdouble doc_width,
5472                         gdouble doc_height,
5473                         int     target_width,
5474                         int     target_height,
5475                         int     vsb_width,
5476                         int     hsb_width)
5477 {
5478         double w_scale;
5479         double h_scale;
5480
5481         w_scale = (double)target_width / doc_width;
5482         h_scale = (double)target_height / doc_height;
5483
5484         if (doc_height * w_scale > target_height)
5485                 w_scale = (double) (target_width - vsb_width) / doc_width;
5486         if (doc_width * h_scale > target_width)
5487                 h_scale = (double) (target_height - hsb_width) / doc_height;
5488
5489         return MIN (w_scale, h_scale);
5490 }
5491
5492
5493 static void
5494 ev_view_zoom_for_size_presentation (EvView *view,
5495                                     int     width,
5496                                     int     height)
5497 {
5498         gdouble doc_width, doc_height;
5499         gdouble scale;
5500
5501         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5502         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
5503         ev_view_set_zoom (view, scale, FALSE);
5504 }
5505
5506 static void
5507 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5508                            int     width,
5509                            int     height,
5510                            int     vsb_width,
5511                            int     hsb_height)
5512 {
5513         gdouble doc_width, doc_height;
5514         GtkBorder border;
5515         gdouble scale;
5516
5517         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5518         if (view->rotation == 90 || view->rotation == 270) {
5519                 gdouble tmp;
5520
5521                 tmp = doc_width;
5522                 doc_width = doc_height;
5523                 doc_height = tmp;
5524         }
5525
5526         compute_border (view, doc_width, doc_height, &border);
5527
5528         doc_width *= 2;
5529         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5530         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5531
5532         /* FIXME: We really need to calculate the overall height here, not the
5533          * page height.  We assume there's always a vertical scrollbar for
5534          * now.  We need to fix this. */
5535         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5536                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5537         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5538                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5539         else
5540                 g_assert_not_reached ();
5541
5542         ev_view_set_zoom (view, scale, FALSE);
5543 }
5544
5545 static void
5546 ev_view_zoom_for_size_continuous (EvView *view,
5547                                   int     width,
5548                                   int     height,
5549                                   int     vsb_width,
5550                                   int     hsb_height)
5551 {
5552         gdouble doc_width, doc_height;
5553         GtkBorder border;
5554         gdouble scale;
5555
5556         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5557         if (view->rotation == 90 || view->rotation == 270) {
5558                 gdouble tmp;
5559
5560                 tmp = doc_width;
5561                 doc_width = doc_height;
5562                 doc_height = tmp;
5563         }
5564
5565         compute_border (view, doc_width, doc_height, &border);
5566
5567         width -= (border.left + border.right + 2 * view->spacing);
5568         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5569
5570         /* FIXME: We really need to calculate the overall height here, not the
5571          * page height.  We assume there's always a vertical scrollbar for
5572          * now.  We need to fix this. */
5573         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5574                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
5575         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5576                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
5577         else
5578                 g_assert_not_reached ();
5579
5580         ev_view_set_zoom (view, scale, FALSE);
5581 }
5582
5583 static void
5584 ev_view_zoom_for_size_dual_page (EvView *view,
5585                                  int     width,
5586                                  int     height,
5587                                  int     vsb_width,
5588                                  int     hsb_height)
5589 {
5590         GtkBorder border;
5591         gdouble doc_width, doc_height;
5592         gdouble scale;
5593         gint other_page;
5594
5595         other_page = view->current_page ^ 1;
5596
5597         /* Find the largest of the two. */
5598         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5599         if (other_page < ev_document_get_n_pages (view->document)) {
5600                 gdouble width_2, height_2;
5601
5602                 get_doc_page_size (view, other_page, &width_2, &height_2);
5603                 if (width_2 > doc_width)
5604                         doc_width = width_2;
5605                 if (height_2 > doc_height)
5606                         doc_height = height_2;
5607         }
5608         compute_border (view, width, height, &border);
5609
5610         doc_width = doc_width * 2;
5611         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5612         height -= (border.top + border.bottom + 2 * view->spacing);
5613
5614         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5615                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5616         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5617                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5618         else
5619                 g_assert_not_reached ();
5620
5621         ev_view_set_zoom (view, scale, FALSE);
5622 }
5623
5624 static void
5625 ev_view_zoom_for_size_single_page (EvView *view,
5626                                    int     width,
5627                                    int     height,
5628                                    int     vsb_width,
5629                                    int     hsb_height)
5630 {
5631         gdouble doc_width, doc_height;
5632         GtkBorder border;
5633         gdouble scale;
5634
5635         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5636
5637         /* Get an approximate border */
5638         compute_border (view, width, height, &border);
5639
5640         width -= (border.left + border.right + 2 * view->spacing);
5641         height -= (border.top + border.bottom + 2 * view->spacing);
5642
5643         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5644                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
5645         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5646                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
5647         else
5648                 g_assert_not_reached ();
5649
5650         ev_view_set_zoom (view, scale, FALSE);
5651 }
5652
5653 void
5654 ev_view_set_zoom_for_size (EvView *view,
5655                            int     width,
5656                            int     height,
5657                            int     vsb_width,
5658                            int     hsb_height)
5659 {
5660         g_return_if_fail (EV_IS_VIEW (view));
5661         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5662                           view->sizing_mode == EV_SIZING_BEST_FIT);
5663         g_return_if_fail (width >= 0);
5664         g_return_if_fail (height >= 0);
5665
5666         if (view->document == NULL)
5667                 return;
5668
5669         if (view->presentation)
5670                 ev_view_zoom_for_size_presentation (view, width, height);
5671         else if (view->continuous && view->dual_page)
5672                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
5673         else if (view->continuous)
5674                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
5675         else if (view->dual_page)
5676                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
5677         else
5678                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
5679 }
5680
5681 /*** Find ***/
5682 static gint
5683 ev_view_find_get_n_results (EvView *view, gint page)
5684 {
5685         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5686 }
5687
5688 static EvRectangle *
5689 ev_view_find_get_result (EvView *view, gint page, gint result)
5690 {
5691         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5692 }
5693
5694 static void
5695 jump_to_find_result (EvView *view)
5696 {
5697         gint n_results;
5698         gint page = view->current_page;
5699
5700         n_results = ev_view_find_get_n_results (view, page);
5701
5702         if (n_results > 0 && view->find_result < n_results) {
5703                 EvRectangle *rect;
5704                 GdkRectangle view_rect;
5705
5706                 rect = ev_view_find_get_result (view, page, view->find_result);
5707                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5708                 ensure_rectangle_is_visible (view, &view_rect);
5709                 view->jump_to_find_result = FALSE;
5710         }
5711 }
5712
5713 /**
5714  * jump_to_find_page
5715  * @view: #EvView instance
5716  * @direction: Direction to look
5717  * @shift: Shift from current page
5718  *
5719  * Jumps to the first page that has occurences of searched word.
5720  * Uses a direction where to look and a shift from current page.
5721  *
5722  */
5723 static void
5724 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5725 {
5726         int n_pages, i;
5727
5728         n_pages = ev_document_get_n_pages (view->document);
5729
5730         for (i = 0; i < n_pages; i++) {
5731                 int page;
5732
5733                 if (direction == EV_VIEW_FIND_NEXT)
5734                         page = view->current_page + i;
5735                 else
5736                         page = view->current_page - i;
5737                 page += shift;
5738
5739                 if (page >= n_pages) {
5740                         page = page - n_pages;
5741                 } else if (page < 0)
5742                         page = page + n_pages;
5743
5744                 if (ev_view_find_get_n_results (view, page) > 0) {
5745                         ev_page_cache_set_current_page (view->page_cache, page);
5746                         break;
5747                 }
5748         }
5749 }
5750
5751 void
5752 ev_view_find_changed (EvView *view, GList **results, gint page)
5753 {
5754         view->find_pages = results;
5755
5756         if (view->jump_to_find_result == TRUE) {
5757                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5758                 jump_to_find_result (view);
5759         }
5760
5761         if (view->current_page == page)
5762                 gtk_widget_queue_draw (GTK_WIDGET (view));
5763 }
5764
5765 void
5766 ev_view_find_next (EvView *view)
5767 {
5768         gint n_results;
5769
5770         n_results = ev_view_find_get_n_results (view, view->current_page);
5771         view->find_result++;
5772
5773         if (view->find_result >= n_results) {
5774                 view->find_result = 0;
5775                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5776                 jump_to_find_result (view);
5777         } else {
5778                 jump_to_find_result (view);
5779                 gtk_widget_queue_draw (GTK_WIDGET (view));
5780         }
5781 }
5782
5783 void
5784 ev_view_find_previous (EvView *view)
5785 {
5786         view->find_result--;
5787
5788         if (view->find_result < 0) {
5789                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5790                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5791                 jump_to_find_result (view);
5792         } else {
5793                 jump_to_find_result (view);
5794                 gtk_widget_queue_draw (GTK_WIDGET (view));
5795         }
5796 }
5797
5798 void
5799 ev_view_find_search_changed (EvView *view)
5800 {
5801         /* search string has changed, focus on new search result */
5802         view->jump_to_find_result = TRUE;
5803         view->find_pages = NULL;
5804 }
5805
5806 void
5807 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5808 {
5809         view->highlight_find_results = value;
5810         gtk_widget_queue_draw (GTK_WIDGET (view));
5811 }
5812
5813 void
5814 ev_view_find_cancel (EvView *view)
5815 {
5816         view->find_pages = NULL;
5817 }
5818
5819 /*** Selections ***/
5820
5821 /* compute_new_selection_rect/text calculates the area currently selected by
5822  * view_rect.  each handles a different mode;
5823  */
5824 static GList *
5825 compute_new_selection_rect (EvView       *view,
5826                             GdkPoint     *start,
5827                             GdkPoint     *stop)
5828 {
5829         GdkRectangle view_rect;
5830         int n_pages, i;
5831         GList *list = NULL;
5832
5833         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5834
5835         view_rect.x = MIN (start->x, stop->x);
5836         view_rect.y = MIN (start->y, stop->y);
5837         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5838         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5839
5840         n_pages = ev_document_get_n_pages (view->document);
5841
5842         for (i = 0; i < n_pages; i++) {
5843                 GdkRectangle page_area;
5844                 GtkBorder border;
5845
5846                 if (get_page_extents (view, i, &page_area, &border)) {
5847                         GdkRectangle overlap;
5848
5849                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5850                                 EvViewSelection *selection;
5851
5852                                 selection = g_new0 (EvViewSelection, 1);
5853                                 selection->page = i;
5854                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5855                                                        &(selection->rect));
5856
5857                                 list = g_list_append (list, selection);
5858                         }
5859                 }
5860         }
5861
5862         return list;
5863 }
5864
5865 static gboolean
5866 gdk_rectangle_point_in (GdkRectangle *rectangle,
5867                         GdkPoint     *point)
5868 {
5869         return rectangle->x <= point->x &&
5870                 rectangle->y <= point->y &&
5871                 point->x < rectangle->x + rectangle->width &&
5872                 point->y < rectangle->y + rectangle->height;
5873 }
5874
5875 static GList *
5876 compute_new_selection_text (EvView          *view,
5877                             EvSelectionStyle style,
5878                             GdkPoint        *start,
5879                             GdkPoint        *stop)
5880 {
5881         int n_pages, i, first, last;
5882         GList *list = NULL;
5883         EvViewSelection *selection;
5884         gdouble width, height;
5885         int start_page, end_page;
5886
5887         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5888
5889         n_pages = ev_document_get_n_pages (view->document);
5890
5891         /* First figure out the range of pages the selection
5892          * affects. */
5893         first = n_pages;
5894         last = 0;
5895         if (view->continuous) {
5896                 start_page = 0;
5897                 end_page = n_pages;
5898         } else if (view->dual_page) {
5899                 start_page = view->start_page;
5900                 end_page = view->end_page + 1;
5901         } else {
5902                 start_page = view->current_page;
5903                 end_page = view->current_page + 1;
5904         }
5905
5906         for (i = start_page; i < end_page; i++) {
5907                 GdkRectangle page_area;
5908                 GtkBorder border;
5909
5910                 get_page_extents (view, i, &page_area, &border);
5911                 if (gdk_rectangle_point_in (&page_area, start) ||
5912                     gdk_rectangle_point_in (&page_area, stop)) {
5913                         if (first == n_pages)
5914                                 first = i;
5915                         last = i;
5916                 }
5917
5918         }
5919
5920         /* Now create a list of EvViewSelection's for the affected
5921          * pages.  This could be an empty list, a list of just one
5922          * page or a number of pages.*/
5923         for (i = first; i < last + 1; i++) {
5924                 GdkRectangle page_area;
5925                 GtkBorder border;
5926                 GdkPoint *point;
5927
5928                 get_doc_page_size (view, i, &width, &height);
5929
5930                 selection = g_new0 (EvViewSelection, 1);
5931                 selection->page = i;
5932                 selection->style = style;
5933                 selection->rect.x1 = selection->rect.y1 = 0;
5934                 selection->rect.x2 = width;
5935                 selection->rect.y2 = height;
5936
5937                 get_page_extents (view, i, &page_area, &border);
5938
5939                 if (gdk_rectangle_point_in (&page_area, start))
5940                         point = start;
5941                 else
5942                         point = stop;
5943
5944                 if (i == first)
5945                         view_point_to_doc_point (view, point, &page_area,
5946                                                  &selection->rect.x1,
5947                                                  &selection->rect.y1);
5948
5949                 /* If the selection is contained within just one page,
5950                  * make sure we don't write 'start' into both points
5951                  * in selection->rect. */
5952                 if (first == last)
5953                         point = stop;
5954
5955                 if (i == last)
5956                         view_point_to_doc_point (view, point, &page_area,
5957                                                  &selection->rect.x2,
5958                                                  &selection->rect.y2);
5959
5960                 list = g_list_append (list, selection);
5961         }
5962
5963         return list;
5964 }
5965
5966 /* This function takes the newly calculated list, and figures out which regions
5967  * have changed.  It then queues a redraw approporiately.
5968  */
5969 static void
5970 merge_selection_region (EvView *view,
5971                         GList  *new_list)
5972 {
5973         GList *old_list;
5974         GList *new_list_ptr, *old_list_ptr;
5975
5976         /* Update the selection */
5977         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
5978         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
5979         g_list_free (view->selection_info.selections);
5980         view->selection_info.selections = new_list;
5981         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
5982         g_object_notify (G_OBJECT (view), "has-selection");
5983
5984         new_list_ptr = new_list;
5985         old_list_ptr = old_list;
5986
5987         while (new_list_ptr || old_list_ptr) {
5988                 EvViewSelection *old_sel, *new_sel;
5989                 int cur_page;
5990                 GdkRegion *region = NULL;
5991
5992                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
5993                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
5994
5995                 /* Assume that the lists are in order, and we run through them
5996                  * comparing them, one page at a time.  We come out with the
5997                  * first page we see. */
5998                 if (new_sel && old_sel) {
5999                         if (new_sel->page < old_sel->page) {
6000                                 new_list_ptr = new_list_ptr->next;
6001                                 old_sel = NULL;
6002                         } else if (new_sel->page > old_sel->page) {
6003                                 old_list_ptr = old_list_ptr->next;
6004                                 new_sel = NULL;
6005                         } else {
6006                                 new_list_ptr = new_list_ptr->next;
6007                                 old_list_ptr = old_list_ptr->next;
6008                         }
6009                 } else if (new_sel) {
6010                         new_list_ptr = new_list_ptr->next;
6011                 } else if (old_sel) {
6012                         old_list_ptr = old_list_ptr->next;
6013                 }
6014
6015                 g_assert (new_sel || old_sel);
6016
6017                 /* is the page we're looking at on the screen?*/
6018                 cur_page = new_sel ? new_sel->page : old_sel->page;
6019                 if (cur_page < view->start_page || cur_page > view->end_page)
6020                         continue;
6021
6022                 /* seed the cache with a new page.  We are going to need the new
6023                  * region too. */
6024                 if (new_sel) {
6025                         GdkRegion *tmp_region = NULL;
6026
6027                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6028                                                                cur_page,
6029                                                                view->scale,
6030                                                                &tmp_region);
6031
6032                         if (tmp_region) {
6033                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6034                         }
6035                 }
6036
6037                 /* Now we figure out what needs redrawing */
6038                 if (old_sel && new_sel) {
6039                         if (old_sel->covered_region && new_sel->covered_region) {
6040                                 /* We only want to redraw the areas that have
6041                                  * changed, so we xor the old and new regions
6042                                  * and redraw if it's different */
6043                                 region = gdk_region_copy (old_sel->covered_region);
6044                                 gdk_region_xor (region, new_sel->covered_region);
6045                                 if (gdk_region_empty (region)) {
6046                                         gdk_region_destroy (region);
6047                                         region = NULL;
6048                                 }
6049                         } else if (old_sel->covered_region) {
6050                                 region = gdk_region_copy (old_sel->covered_region);
6051                         } else if (new_sel->covered_region) {
6052                                 region = gdk_region_copy (new_sel->covered_region);
6053                         }
6054                 } else if (old_sel && !new_sel) {
6055                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6056                                 region = gdk_region_copy (old_sel->covered_region);
6057                         }
6058                 } else if (!old_sel && new_sel) {
6059                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6060                                 region = gdk_region_copy (new_sel->covered_region);
6061                         }
6062                 } else {
6063                         g_assert_not_reached ();
6064                 }
6065
6066                 /* Redraw the damaged region! */
6067                 if (region) {
6068                         GdkRectangle page_area;
6069                         GtkBorder border;
6070
6071                         /* I don't know why but the region is smaller
6072                          * than expected. This hack fixes it, I guess
6073                          * 10 pixels more won't hurt
6074                          */
6075                         gdk_region_shrink (region, -5, -5);
6076
6077                         get_page_extents (view, cur_page, &page_area, &border);
6078                         gdk_region_offset (region,
6079                                            page_area.x + border.left - view->scroll_x,
6080                                            page_area.y + border.top - view->scroll_y);
6081                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6082                         gdk_region_destroy (region);
6083                 }
6084         }
6085
6086         /* Free the old list, now that we're done with it. */
6087         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6088         g_list_free (old_list);
6089 }
6090
6091 static void
6092 compute_selections (EvView          *view,
6093                     EvSelectionStyle style,
6094                     GdkPoint        *start,
6095                     GdkPoint        *stop)
6096 {
6097         GList *list;
6098
6099         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6100                 list = compute_new_selection_rect (view, start, stop);
6101         else
6102                 list = compute_new_selection_text (view, style, start, stop);
6103         merge_selection_region (view, list);
6104 }
6105
6106 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6107  */
6108 static void
6109 selection_free (EvViewSelection *selection)
6110 {
6111         if (selection->covered_region)
6112                 gdk_region_destroy (selection->covered_region);
6113         g_free (selection);
6114 }
6115
6116 static void
6117 clear_selection (EvView *view)
6118 {
6119         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6120         g_list_free (view->selection_info.selections);
6121         view->selection_info.selections = NULL;
6122         view->selection_info.in_selection = FALSE;
6123         if (view->pixbuf_cache)
6124                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6125         g_object_notify (G_OBJECT (view), "has-selection");
6126 }
6127
6128 void
6129 ev_view_select_all (EvView *view)
6130 {
6131         GList *selections = NULL;
6132         int n_pages, i;
6133
6134         /* Disable selection on rotated pages for the 0.4.0 series */
6135         if (view->rotation != 0)
6136                 return;
6137
6138         clear_selection (view);
6139
6140         n_pages = ev_document_get_n_pages (view->document);
6141         for (i = 0; i < n_pages; i++) {
6142                 gdouble width, height;
6143                 EvViewSelection *selection;
6144
6145                 get_doc_page_size (view, i, &width, &height);
6146
6147                 selection = g_new0 (EvViewSelection, 1);
6148                 selection->page = i;
6149                 selection->style = EV_SELECTION_STYLE_GLYPH;
6150                 selection->rect.x1 = selection->rect.y1 = 0;
6151                 selection->rect.x2 = width;
6152                 selection->rect.y2 = height;
6153
6154                 selections = g_list_append (selections, selection);
6155         }
6156
6157         merge_selection_region (view, selections);
6158         gtk_widget_queue_draw (GTK_WIDGET (view));
6159 }
6160
6161 gboolean
6162 ev_view_get_has_selection (EvView *view)
6163 {
6164         return view->selection_info.selections != NULL;
6165 }
6166
6167 static char *
6168 get_selected_text (EvView *view)
6169 {
6170         GString *text;
6171         GList *l;
6172         gchar *normalized_text;
6173         EvRenderContext *rc;
6174
6175         text = g_string_new (NULL);
6176         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6177
6178         ev_document_doc_mutex_lock ();
6179
6180         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6181                 EvViewSelection *selection = (EvViewSelection *)l->data;
6182                 EvPage *page;
6183                 gchar *tmp;
6184
6185                 page = ev_document_get_page (view->document, selection->page);
6186                 ev_render_context_set_page (rc, page);
6187                 g_object_unref (page);
6188
6189                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6190                                                       rc, selection->style,
6191                                                       &(selection->rect));
6192
6193                 g_string_append (text, tmp);
6194                 g_free (tmp);
6195         }
6196
6197         g_object_unref (rc);
6198
6199         ev_document_doc_mutex_unlock ();
6200
6201         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6202         g_string_free (text, TRUE);
6203         return normalized_text;
6204 }
6205
6206 static void
6207 ev_view_clipboard_copy (EvView      *view,
6208                         const gchar *text)
6209 {
6210         GtkClipboard *clipboard;
6211
6212         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6213                                               GDK_SELECTION_CLIPBOARD);
6214         gtk_clipboard_set_text (clipboard, text, -1);
6215 }
6216
6217 void
6218 ev_view_copy (EvView *ev_view)
6219 {
6220         char *text;
6221
6222         if (!EV_IS_SELECTION (ev_view->document))
6223                 return;
6224
6225         text = get_selected_text (ev_view);
6226         ev_view_clipboard_copy (ev_view, text);
6227         g_free (text);
6228 }
6229
6230 static void
6231 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6232                         GtkSelectionData *selection_data,
6233                         guint             info,
6234                         gpointer          data)
6235 {
6236         EvView *ev_view = EV_VIEW (data);
6237
6238         if (ev_view->link_selected) {
6239                 gtk_selection_data_set_text (selection_data,
6240                                              ev_link_action_get_uri (ev_view->link_selected),
6241                                              -1);
6242         } else if (EV_IS_SELECTION (ev_view->document) &&
6243                    ev_view->selection_info.selections) {
6244                 gchar *text;
6245
6246                 text = get_selected_text (ev_view);
6247                 if (text) {
6248                         gtk_selection_data_set_text (selection_data, text, -1);
6249                         g_free (text);
6250                 }
6251         }
6252 }
6253
6254 static void
6255 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6256                           gpointer      data)
6257 {
6258         EvView *view = EV_VIEW (data);
6259
6260         clear_selection (view);
6261         clear_link_selected (view);
6262 }
6263
6264 static void
6265 ev_view_update_primary_selection (EvView *ev_view)
6266 {
6267         GtkClipboard *clipboard;
6268
6269         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6270                                               GDK_SELECTION_PRIMARY);
6271
6272         if (ev_view->selection_info.selections || ev_view->link_selected) {
6273                 GtkTargetList *target_list;
6274                 GtkTargetEntry *targets;
6275                 int n_targets;
6276
6277                 target_list = gtk_target_list_new (NULL, 0);
6278                 gtk_target_list_add_text_targets (target_list, 0);
6279                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6280                 gtk_target_list_unref (target_list);
6281
6282                 if (!gtk_clipboard_set_with_owner (clipboard,
6283                                                    targets, n_targets,
6284                                                    ev_view_primary_get_cb,
6285                                                    ev_view_primary_clear_cb,
6286                                                    G_OBJECT (ev_view)))
6287                         ev_view_primary_clear_cb (clipboard, ev_view);
6288
6289                 gtk_target_table_free (targets, n_targets);
6290         } else {
6291                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6292                         gtk_clipboard_clear (clipboard);
6293         }
6294 }
6295
6296 static void
6297 clear_link_selected (EvView *view)
6298 {
6299         if (view->link_selected) {
6300                 g_object_unref (view->link_selected);
6301                 view->link_selected = NULL;
6302         }
6303 }
6304
6305 void
6306 ev_view_copy_link_address (EvView       *view,
6307                            EvLinkAction *action)
6308 {
6309         clear_link_selected (view);
6310
6311         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6312
6313         view->link_selected = g_object_ref (action);
6314         ev_view_update_primary_selection (view);
6315 }
6316
6317 /*** Cursor operations ***/
6318
6319 static GdkCursor *
6320 ev_view_create_invisible_cursor(void)
6321 {
6322        GdkBitmap *empty;
6323        GdkColor black = { 0, 0, 0, 0 };
6324        static char bits[] = { 0x00 };
6325
6326        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6327
6328        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6329 }
6330
6331 static void
6332 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6333 {
6334         GdkCursor *cursor = NULL;
6335         GdkDisplay *display;
6336         GtkWidget *widget;
6337
6338         if (view->cursor == new_cursor) {
6339                 return;
6340         }
6341
6342         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6343         display = gtk_widget_get_display (widget);
6344         view->cursor = new_cursor;
6345
6346         switch (new_cursor) {
6347                 case EV_VIEW_CURSOR_NORMAL:
6348                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6349                         break;
6350                 case EV_VIEW_CURSOR_IBEAM:
6351                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6352                         break;
6353                 case EV_VIEW_CURSOR_LINK:
6354                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6355                         break;
6356                 case EV_VIEW_CURSOR_WAIT:
6357                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6358                         break;
6359                 case EV_VIEW_CURSOR_HIDDEN:
6360                         cursor = ev_view_create_invisible_cursor ();
6361                         break;
6362                 case EV_VIEW_CURSOR_DRAG:
6363                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6364                         break;
6365                 case EV_VIEW_CURSOR_AUTOSCROLL:
6366                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6367                         break;
6368         }
6369
6370         if (cursor) {
6371                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6372                 gdk_cursor_unref (cursor);
6373                 gdk_flush();
6374         }
6375 }
6376
6377 void
6378 ev_view_hide_cursor (EvView *view)
6379 {
6380        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6381 }
6382
6383 void
6384 ev_view_show_cursor (EvView *view)
6385 {
6386        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6387 }
6388
6389 static void
6390 ev_view_reset_presentation_state (EvView *view)
6391 {
6392         if (!view->presentation ||
6393             view->presentation_state == EV_PRESENTATION_NORMAL)
6394                 return;
6395
6396         view->presentation_state = EV_PRESENTATION_NORMAL;
6397         gdk_window_set_background (view->layout.bin_window,
6398                                    &GTK_WIDGET (view)->style->black);
6399         gtk_widget_queue_draw (GTK_WIDGET (view));
6400 }
6401
6402 gboolean
6403 ev_view_next_page (EvView *view)
6404 {
6405         int page, n_pages;
6406
6407         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6408
6409         if (!view->page_cache)
6410                 return FALSE;
6411
6412         if (view->presentation &&
6413             (view->presentation_state == EV_PRESENTATION_BLACK ||
6414              view->presentation_state == EV_PRESENTATION_WHITE)) {
6415                 ev_view_reset_presentation_state (view);
6416                 return FALSE;
6417         }
6418
6419         if (view->animation) {
6420                 ev_view_transition_animation_cancel (view->animation, view);
6421         }
6422
6423         ev_view_presentation_transition_stop (view);
6424         ev_view_reset_presentation_state (view);
6425
6426         page = ev_page_cache_get_current_page (view->page_cache);
6427         n_pages = ev_document_get_n_pages (view->document);
6428
6429         if (view->dual_page && !view->presentation)
6430                 page = page + 2;
6431         else
6432                 page = page + 1;
6433
6434         if (page < n_pages) {
6435                 ev_page_cache_set_current_page (view->page_cache, page);
6436                 return TRUE;
6437         } else if (view->presentation && page == n_pages) {
6438                 view->presentation_state = EV_PRESENTATION_END;
6439                 gtk_widget_queue_draw (GTK_WIDGET (view));
6440                 return TRUE;
6441         } else if (view->dual_page && page == n_pages) {
6442                 ev_page_cache_set_current_page (view->page_cache, page - 1);
6443                 return TRUE;
6444         } else {
6445                 return FALSE;
6446         }
6447 }
6448
6449 gboolean
6450 ev_view_previous_page (EvView *view)
6451 {
6452         int page;
6453
6454         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6455
6456         if (!view->page_cache)
6457                 return FALSE;
6458
6459         if (view->presentation &&
6460             view->presentation_state == EV_PRESENTATION_END) {
6461                 ev_view_reset_presentation_state (view);
6462                 return TRUE;
6463         }
6464
6465         if (view->presentation &&
6466             (view->presentation_state == EV_PRESENTATION_BLACK ||
6467              view->presentation_state == EV_PRESENTATION_WHITE)) {
6468                 ev_view_reset_presentation_state (view);
6469                 return FALSE;
6470         }
6471
6472         if (view->animation) {
6473                 ev_view_transition_animation_cancel (view->animation, view);
6474         }
6475
6476         ev_view_reset_presentation_state (view);
6477
6478         page = ev_page_cache_get_current_page (view->page_cache);
6479
6480         if (view->dual_page && !view->presentation)
6481                 page = page - 2;
6482         else
6483                 page = page - 1;
6484
6485         if (page >= 0) {
6486                 ev_page_cache_set_current_page (view->page_cache, page);
6487                 return TRUE;
6488         } else if (ev_view_get_dual_page (view) && page == -1) {
6489                 ev_page_cache_set_current_page (view->page_cache, 0);
6490                 return TRUE;
6491         } else {
6492                 return FALSE;
6493         }
6494 }
6495