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