libview/ev-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *  Copyright (C) 2004 Red Hat, Inc
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <math.h>
  25 #include <string.h>
  26
  27 #include <glib/gi18n-lib.h>
  28 #include <gtk/gtk.h>
  29 #include <gdk/gdkkeysyms.h>
  30
  31 #include "ev-mapping.h"
  32 #include "ev-document-forms.h"
  33 #include "ev-document-images.h"
  34 #include "ev-document-links.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-document-transition.h"
  37 #include "ev-pixbuf-cache.h"
  38 #include "ev-transition-animation.h"
  39 #include "ev-view-marshal.h"
  40 #include "ev-document-annotations.h"
  41 #include "ev-annotation-window.h"
  42 #include "ev-view.h"
  43 #include "ev-view-accessible.h"
  44 #include "ev-view-private.h"
  45 #include "ev-view-type-builtins.h"
  46
  47 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  48 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  49 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  50
  51 enum {
  52         PROP_0,
  53         PROP_CONTINUOUS,
  54         PROP_DUAL_PAGE,
  55         PROP_FULLSCREEN,
  56         PROP_PRESENTATION,
  57         PROP_SIZING_MODE,
  58         PROP_ZOOM,
  59         PROP_ROTATION,
  60         PROP_HAS_SELECTION,
  61 };
  62
  63 enum {
  64         SIGNAL_BINDING_ACTIVATED,
  65         SIGNAL_HANDLE_LINK,
  66         SIGNAL_EXTERNAL_LINK,
  67         SIGNAL_POPUP_MENU,
  68         N_SIGNALS,
  69 };
  70
  71 enum {
  72         TARGET_DND_URI,
  73         TARGET_DND_TEXT,
  74         TARGET_DND_IMAGE
  75 };
  76
  77 static guint signals[N_SIGNALS];
  78
  79 typedef enum {
  80         EV_VIEW_FIND_NEXT,
  81         EV_VIEW_FIND_PREV
  82 } EvViewFindDirection;
  83
  84 #define ZOOM_IN_FACTOR  1.2
  85 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  86
  87 #define SCROLL_TIME 150
  88
  89 /*** Scrolling ***/
  90 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  91                                                               GtkAdjustment      *hadjustment,
  92                                                               GtkAdjustment      *vadjustment);
  93 static void       view_update_range_and_current_page         (EvView             *view);
  94 static void       set_scroll_adjustment                      (EvView             *view,
  95                                                               GtkOrientation      orientation,
  96                                                               GtkAdjustment      *adjustment);
  97 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  98                                                               guint               keyval,
  99                                                               GdkModifierType modifiers,
 100                                                               GtkScrollType       scroll,
 101                                                               gboolean            horizontal);
 102 static void       ensure_rectangle_is_visible                (EvView             *view,
 103                                                               GdkRectangle       *rect);
 104
 105 /*** Geometry computations ***/
 106 static void       compute_border                             (EvView             *view,
 107                                                               int                 width,
 108                                                               int                 height,
 109                                                               GtkBorder          *border);
 110 static void       get_page_y_offset                          (EvView             *view,
 111                                                               int                 page,
 112                                                               int                *y_offset);
 113 static gboolean   get_page_extents                           (EvView             *view,
 114                                                               gint                page,
 115                                                               GdkRectangle       *page_area,
 116                                                               GtkBorder          *border);
 117 static void       view_rect_to_doc_rect                      (EvView             *view,
 118                                                               GdkRectangle       *view_rect,
 119                                                               GdkRectangle       *page_area,
 120                                                               EvRectangle        *doc_rect);
 121 static void       doc_rect_to_view_rect                      (EvView             *view,
 122                                                               int                 page,
 123                                                               EvRectangle        *doc_rect,
 124                                                               GdkRectangle       *view_rect);
 125 static gboolean   get_dual_even_left                         (EvView             *view);
 126 static void       find_page_at_location                      (EvView             *view,
 127                                                               gdouble             x,
 128                                                               gdouble             y,
 129                                                               gint               *page,
 130                                                               gint               *x_offset,
 131                                                               gint               *y_offset);
 132 static void       doc_point_to_view_point                    (EvView             *view,
 133                                                               int                 page,
 134                                                               EvPoint            *doc_point,
 135                                                               GdkPoint           *view_point);
 136 /*** Hyperrefs ***/
 137 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 138                                                               gdouble             x,
 139                                                               gdouble             y);
 140 static char*      tip_from_link                              (EvView             *view,
 141                                                               EvLink             *link);
 142 /*** Forms ***/
 143 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 144                                                                gdouble            x,
 145                                                                gdouble            y);
 146
 147 /*** Annotations ***/
 148 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 149                                                               gdouble             x,
 150                                                               gdouble             y);
 151 static void          show_annotation_windows                 (EvView             *view,
 152                                                               gint                page);
 153 static void          hide_annotation_windows                 (EvView             *view,
 154                                                               gint                page);
 155 /*** GtkWidget implementation ***/
 156 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 157                                                               GtkRequisition     *requisition);
 158 static void       ev_view_size_request_continuous            (EvView             *view,
 159                                                               GtkRequisition     *requisition);
 160 static void       ev_view_size_request_dual_page             (EvView             *view,
 161                                                               GtkRequisition     *requisition);
 162 static void       ev_view_size_request_single_page           (EvView             *view,
 163                                                               GtkRequisition     *requisition);
 164 static void       ev_view_size_request                       (GtkWidget          *widget,
 165                                                               GtkRequisition     *requisition);
 166 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 167                                                               GtkAllocation      *allocation);
 168 static void       ev_view_realize                            (GtkWidget          *widget);
 169 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 170                                                               GdkEventScroll     *event);
 171 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 172                                                               GdkEventExpose     *event);
 173 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 174 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 175                                                               GdkEventButton     *event);
 176 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 177                                                               GdkEventMotion     *event);
 178 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 179                                                               GdkEventButton     *event);
 180 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 181                                                               GdkEventCrossing   *event);
 182 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 183                                                               GdkEventCrossing   *event);
 184 static void       ev_view_style_set                          (GtkWidget          *widget,
 185                                                               GtkStyle           *old_style);
 186 static void       ev_view_remove_all                         (EvView             *view);
 187
 188 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 189
 190 /*** Drawing ***/
 191 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 192 static void       draw_rubberband                            (GtkWidget          *widget,
 193                                                               GdkWindow          *window,
 194                                                               const GdkRectangle *rect,
 195                                                               guchar              alpha);
 196 static void       highlight_find_results                     (EvView             *view,
 197                                                               int                 page);
 198 static void       draw_one_page                              (EvView             *view,
 199                                                               gint                page,
 200                                                               cairo_t            *cr,
 201                                                               GdkRectangle       *page_area,
 202                                                               GtkBorder          *border,
 203                                                               GdkRectangle       *expose_area,
 204                                                               gboolean           *page_ready);
 205 static void       draw_loading_text                          (EvView             *view,
 206                                                               GdkRectangle       *page_area,
 207                                                               GdkRectangle       *expose_area);
 208 static void       ev_view_reload_page                        (EvView             *view,
 209                                                               gint                page,
 210                                                               GdkRegion          *region);
 211
 212 /*** Callbacks ***/
 213 static void       ev_view_change_page                        (EvView             *view,
 214                                                               gint                new_page,
 215                                                               gboolean            start_transition);
 216 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 217                                                               GdkRegion          *region,
 218                                                               EvView             *view);
 219 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 220                                                               gint                old_page,
 221                                                               gint                new_page,
 222                                                               EvView             *view);
 223 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 224                                                               EvView             *view);
 225
 226 /*** GObject ***/
 227 static void       ev_view_finalize                           (GObject            *object);
 228 static void       ev_view_destroy                            (GtkObject          *object);
 229 static void       ev_view_set_property                       (GObject            *object,
 230                                                               guint               prop_id,
 231                                                               const GValue       *value,
 232                                                               GParamSpec         *pspec);
 233 static void       ev_view_get_property                       (GObject            *object,
 234                                                               guint               prop_id,
 235                                                               GValue             *value,
 236                                                               GParamSpec         *pspec);
 237 static void       ev_view_class_init                         (EvViewClass        *class);
 238 static void       ev_view_init                               (EvView             *view);
 239
 240 /*** Zoom and sizing ***/
 241 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 242                                                               gdouble doc_height,
 243                                                               int     target_width,
 244                                                               int     target_height);
 245 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 246                                                               gdouble doc_height,
 247                                                               int     target_width,
 248                                                               int     target_height);
 249 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 250                                                               gdouble doc_height,
 251                                                               int     target_width,
 252                                                               int     target_height);
 253 static void     ev_view_zoom_for_size                        (EvView *view,
 254                                                               int     width,
 255                                                               int     height);
 256 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 257                                                               int     width,
 258                                                               int     height);
 259 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 260                                                                 int     width,
 261                                                                 int     height);
 262 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 263                                                                 int     width,
 264                                                                 int     height);
 265 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 266                                                                 int     width,
 267                                                                 int     height);
 268 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height);
 271 /*** Cursors ***/
 272 static GdkCursor* ev_view_create_invisible_cursor            (void);
 273 static void       ev_view_set_cursor                         (EvView             *view,
 274                                                               EvViewCursor        new_cursor);
 275 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 276                                                               gint x,
 277                                                               gint y);
 278
 279 /*** Find ***/
 280 static gint         ev_view_find_get_n_results               (EvView             *view,
 281                                                               gint                page);
 282 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 283                                                               gint                page,
 284                                                               gint                result);
 285 static void       jump_to_find_result                        (EvView             *view);
 286 static void       jump_to_find_page                          (EvView             *view,
 287                                                               EvViewFindDirection direction,
 288                                                               gint                shift);
 289
 290 /*** Selection ***/
 291 static void       compute_selections                         (EvView             *view,
 292                                                               EvSelectionStyle    style,
 293                                                               GdkPoint           *start,
 294                                                               GdkPoint           *stop);
 295 static void       clear_selection                            (EvView             *view);
 296 static void       clear_link_selected                        (EvView             *view);
 297 static void       selection_free                             (EvViewSelection    *selection);
 298 static char*      get_selected_text                          (EvView             *ev_view);
 299 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 300                                                               GtkSelectionData   *selection_data,
 301                                                               guint               info,
 302                                                               gpointer            data);
 303 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 304                                                               gpointer            data);
 305 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 306
 307 /*** Presentation ***/
 308 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 309 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 310
 311
 312 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 313
 314 /* HeightToPage cache */
 315 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 316
 317 static void
 318 build_height_to_page (EvHeightToPageCache *cache,
 319                       EvDocument          *document,
 320                       gint                 rotation)
 321 {
 322         gboolean swap, uniform, dual_even_left;
 323         int i;
 324         double uniform_height, page_height, next_page_height;
 325         double saved_height;
 326         gdouble u_width, u_height;
 327         gint n_pages;
 328
 329         swap = (rotation == 90 || rotation == 270);
 330
 331         uniform = ev_document_is_page_size_uniform (document);
 332         n_pages = ev_document_get_n_pages (document);
 333         dual_even_left = (n_pages > 2);
 334
 335         g_free (cache->height_to_page);
 336         g_free (cache->dual_height_to_page);
 337
 338         cache->rotation = rotation;
 339         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 340         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 341
 342         if (uniform)
 343                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 344
 345         saved_height = 0;
 346         for (i = 0; i <= n_pages; i++) {
 347                 if (uniform) {
 348                         uniform_height = swap ? u_width : u_height;
 349                         cache->height_to_page[i] = i * uniform_height;
 350                 } else {
 351                         if (i < n_pages) {
 352                                 gdouble w, h;
 353
 354                                 ev_document_get_page_size (document, i, &w, &h);
 355                                 page_height = swap ? w : h;
 356                         } else {
 357                                 page_height = 0;
 358                         }
 359                         cache->height_to_page[i] = saved_height;
 360                         saved_height += page_height;
 361                 }
 362         }
 363
 364         if (dual_even_left && !uniform) {
 365                 gdouble w, h;
 366
 367                 ev_document_get_page_size (document, 0, &w, &h);
 368                 saved_height = swap ? w : h;
 369         } else {
 370                 saved_height = 0;
 371         }
 372
 373         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 374                 if (uniform) {
 375                         uniform_height = swap ? u_width : u_height;
 376                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 377                         if (i + 1 < n_pages + 2)
 378                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 379                 } else {
 380                         if (i + 1 < n_pages) {
 381                                 gdouble w, h;
 382
 383                                 ev_document_get_page_size (document, i + 1, &w, &h);
 384                                 next_page_height = swap ? w : h;
 385                         } else {
 386                                 next_page_height = 0;
 387                         }
 388
 389                         if (i < n_pages) {
 390                                 gdouble w, h;
 391
 392                                 ev_document_get_page_size (document, i, &w, &h);
 393                                 page_height = swap ? w : h;
 394                         } else {
 395                                 page_height = 0;
 396                         }
 397
 398                         if (i + 1 < n_pages + 2) {
 399                                 cache->dual_height_to_page[i] = saved_height;
 400                                 cache->dual_height_to_page[i + 1] = saved_height;
 401                                 saved_height += MAX(page_height, next_page_height);
 402                         } else {
 403                                 cache->dual_height_to_page[i] = saved_height;
 404                         }
 405                 }
 406         }
 407 }
 408
 409 static void
 410 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 411                                     EvDocument          *document,
 412                                     gint                 page,
 413                                     gint                 rotation,
 414                                     gdouble             *height,
 415                                     gdouble             *dual_height)
 416 {
 417         if (cache->rotation != rotation)
 418                 build_height_to_page (cache, document, rotation);
 419
 420         *height = cache->height_to_page[page];
 421         *dual_height = cache->dual_height_to_page[page];
 422 }
 423
 424 static void
 425 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 426 {
 427         if (cache->height_to_page) {
 428                 g_free (cache->height_to_page);
 429                 cache->height_to_page = NULL;
 430         }
 431
 432         if (cache->dual_height_to_page) {
 433                 g_free (cache->dual_height_to_page);
 434                 cache->dual_height_to_page = NULL;
 435         }
 436         g_free (cache);
 437 }
 438
 439 static EvHeightToPageCache *
 440 ev_view_get_height_to_page_cache (EvView *view)
 441 {
 442         EvHeightToPageCache *cache;
 443
 444         if (!view->document)
 445                 return NULL;
 446
 447         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 448         if (!cache) {
 449                 cache = g_new0 (EvHeightToPageCache, 1);
 450                 build_height_to_page (cache, view->document, view->rotation);
 451                 g_object_set_data_full (G_OBJECT (view->document),
 452                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 453                                         cache,
 454                                         (GDestroyNotify)ev_height_to_page_cache_free);
 455         }
 456
 457         return cache;
 458 }
 459
 460 static void
 461 ev_view_get_height_to_page (EvView *view,
 462                             gint    page,
 463                             gint   *height,
 464                             gint   *dual_height)
 465 {
 466         gdouble h, dh;
 467
 468         if (!view->height_to_page_cache)
 469                 return;
 470
 471         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 472                                             view->document,
 473                                             page,
 474                                             view->rotation,
 475                                             &h, &dh);
 476         if (height)
 477                 *height = (gint)(h * view->scale + 0.5);
 478
 479         if (dual_height)
 480                 *dual_height = (gint)(dh * view->scale + 0.5);
 481 }
 482
 483 static void
 484 scroll_to_point (EvView        *view,
 485                  gdouble        x,
 486                  gdouble        y,
 487                  GtkOrientation orientation)
 488 {
 489         if (orientation == GTK_ORIENTATION_VERTICAL) {
 490                 if (view->continuous) {
 491                         gtk_adjustment_clamp_page (view->vadjustment,
 492                                                    y - view->spacing / 2,
 493                                                    y + view->vadjustment->page_size);
 494                 } else {
 495                         gtk_adjustment_set_value (view->vadjustment,
 496                                                   CLAMP (y,
 497                                                   view->vadjustment->lower,
 498                                                   view->vadjustment->upper -
 499                                                   view->vadjustment->page_size));
 500                 }
 501         } else {
 502                 if (view->dual_page) {
 503                         gtk_adjustment_clamp_page (view->hadjustment, x,
 504                                                    x + view->hadjustment->page_size);
 505                 } else {
 506                         gtk_adjustment_set_value (view->hadjustment,
 507                                                   CLAMP (x,
 508                                                   view->hadjustment->lower,
 509                                                   view->hadjustment->upper -
 510                                                   view->hadjustment->page_size));
 511                 }
 512         }
 513 }
 514
 515 static void
 516 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 517 {
 518         gdouble x, y;
 519
 520         if (!view->document)
 521                 return;
 522
 523         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 524             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 525                 GdkRectangle page_area;
 526                 GtkBorder    border;
 527
 528                 get_page_extents (view, view->current_page, &page_area, &border);
 529                 x = page_area.x;
 530                 y = page_area.y;
 531         } else {
 532                 GdkPoint view_point;
 533
 534                 doc_point_to_view_point (view, view->current_page,
 535                                          &view->pending_point, &view_point);
 536                 x = view_point.x;
 537                 y = view_point.y;
 538         }
 539
 540         scroll_to_point (view, x, y, orientation);
 541 }
 542
 543 static void
 544 view_set_adjustment_values (EvView         *view,
 545                             GtkOrientation  orientation)
 546 {
 547         GtkWidget *widget = GTK_WIDGET (view);
 548         GtkAdjustment *adjustment;
 549         int requisition;
 550         int allocation;
 551
 552         double factor;
 553         gint new_value;
 554
 555         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 556                 requisition = widget->requisition.width;
 557                 allocation = widget->allocation.width;
 558                 adjustment = view->hadjustment;
 559         } else {
 560                 requisition = widget->requisition.height;
 561                 allocation = widget->allocation.height;
 562                 adjustment = view->vadjustment;
 563         }
 564
 565         if (!adjustment)
 566                 return;
 567
 568         factor = 1.0;
 569         switch (view->pending_scroll) {
 570                 case SCROLL_TO_KEEP_POSITION:
 571                 case SCROLL_TO_FIND_LOCATION:
 572                         factor = (adjustment->value) / adjustment->upper;
 573                         break;
 574                 case SCROLL_TO_PAGE_POSITION:
 575                         break;
 576                 case SCROLL_TO_CENTER:
 577                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 578                         break;
 579         }
 580
 581         adjustment->page_size = allocation;
 582         adjustment->step_increment = allocation * 0.1;
 583         adjustment->page_increment = allocation * 0.9;
 584         adjustment->lower = 0;
 585         adjustment->upper = MAX (allocation, requisition);
 586
 587         /*
 588          * We add 0.5 to the values before to average out our rounding errors.
 589          */
 590         switch (view->pending_scroll) {
 591                 case SCROLL_TO_KEEP_POSITION:
 592                 case SCROLL_TO_FIND_LOCATION:
 593                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 594                         gtk_adjustment_set_value (adjustment, (int)new_value);
 595                         break;
 596                 case SCROLL_TO_PAGE_POSITION:
 597                         ev_view_scroll_to_page_position (view, orientation);
 598                         break;
 599                 case SCROLL_TO_CENTER:
 600                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 601                                            0, adjustment->upper - adjustment->page_size);
 602                         gtk_adjustment_set_value (adjustment, (int)new_value);
 603                         break;
 604         }
 605
 606         gtk_adjustment_changed (adjustment);
 607 }
 608
 609 static void
 610 view_update_range_and_current_page (EvView *view)
 611 {
 612         gint current_page;
 613         gint best_current_page = -1;
 614         gint start = view->start_page;
 615         gint end = view->end_page;
 616
 617         /* Presentation trumps all other modes */
 618         if (view->presentation) {
 619                 view->start_page = view->current_page;
 620                 view->end_page = view->current_page;
 621         } else if (view->continuous) {
 622                 GdkRectangle current_area, unused, page_area;
 623                 GtkBorder border;
 624                 gboolean found = FALSE;
 625                 gint area_max = -1, area;
 626                 int i;
 627
 628                 if (!(view->vadjustment && view->hadjustment))
 629                         return;
 630
 631                 current_area.x = view->hadjustment->value;
 632                 current_area.width = view->hadjustment->upper;
 633                 current_area.y = view->vadjustment->value;
 634                 current_area.height = view->vadjustment->page_size;
 635
 636                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 637
 638                         get_page_extents (view, i, &page_area, &border);
 639
 640                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 641                                 area = unused.width * unused.height;
 642
 643                                 if (!found) {
 644                                         area_max = area;
 645                                         view->start_page = i;
 646                                         found = TRUE;
 647                                         best_current_page = i;
 648                                 }
 649                                 if (area > area_max) {
 650                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 651                                         area_max = area;
 652                                 }
 653
 654                                 view->end_page = i;
 655                         } else if (found && view->current_page <= view->end_page) {
 656                                 break;
 657                         }
 658                 }
 659
 660         } else if (view->dual_page) {
 661                 if (view->current_page % 2 == get_dual_even_left (view)) {
 662                         view->start_page = view->current_page;
 663                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 664                                 view->end_page = view->start_page + 1;
 665                         else
 666                                 view->end_page = view->start_page;
 667                 } else {
 668                         if (view->current_page < 1)
 669                                 view->start_page = view->current_page;
 670                         else
 671                                 view->start_page = view->current_page - 1;
 672                         view->end_page = view->current_page;
 673                 }
 674         } else {
 675                 view->start_page = view->current_page;
 676                 view->end_page = view->current_page;
 677         }
 678
 679         best_current_page = MAX (best_current_page, view->start_page);
 680         current_page = ev_document_model_get_page (view->model);
 681
 682         if ((current_page != best_current_page) && (view->pending_scroll == SCROLL_TO_KEEP_POSITION)) {
 683                 view->current_page = best_current_page;
 684                 ev_document_model_set_page (view->model, best_current_page);
 685         }
 686
 687         if (start != view->start_page || end != view->end_page) {
 688                 gint i;
 689
 690                 for (i = start; i < view->start_page; i++) {
 691                         hide_annotation_windows (view, i);
 692                 }
 693
 694                 for (i = end; i > view->end_page; i--) {
 695                         hide_annotation_windows (view, i);
 696                 }
 697         }
 698
 699         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 700                                         view->start_page,
 701                                         view->end_page,
 702                                         view->rotation,
 703                                         view->scale,
 704                                         view->selection_info.selections);
 705 }
 706
 707 static void
 708 set_scroll_adjustment (EvView *view,
 709                        GtkOrientation  orientation,
 710                        GtkAdjustment  *adjustment)
 711 {
 712         GtkAdjustment **to_set;
 713
 714         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 715                 to_set = &view->hadjustment;
 716         else
 717                 to_set = &view->vadjustment;
 718
 719         if (*to_set != adjustment) {
 720                 if (*to_set) {
 721                         g_signal_handlers_disconnect_by_func (*to_set,
 722                                                               (gpointer) on_adjustment_value_changed,
 723                                                               view);
 724                         g_object_unref (*to_set);
 725                 }
 726
 727                 *to_set = adjustment;
 728                 view_set_adjustment_values (view, orientation);
 729
 730                 if (*to_set) {
 731                         g_object_ref (*to_set);
 732                         g_signal_connect (*to_set, "value_changed",
 733                                           G_CALLBACK (on_adjustment_value_changed), view);
 734                 }
 735         }
 736 }
 737
 738 static void
 739 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 740                                 GtkAdjustment  *hadjustment,
 741                                 GtkAdjustment  *vadjustment)
 742 {
 743         EvView *view = EV_VIEW (layout);
 744
 745         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 746         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 747
 748         on_adjustment_value_changed (NULL, view);
 749 }
 750
 751 static void
 752 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 753                            guint           keyval,
 754                            GdkModifierType modifiers,
 755                            GtkScrollType   scroll,
 756                            gboolean        horizontal)
 757 {
 758   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 759
 760   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 761                                 "binding_activated", 2,
 762                                 GTK_TYPE_SCROLL_TYPE, scroll,
 763                                 G_TYPE_BOOLEAN, horizontal);
 764   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 765                                 "binding_activated", 2,
 766                                 GTK_TYPE_SCROLL_TYPE, scroll,
 767                                 G_TYPE_BOOLEAN, horizontal);
 768 }
 769
 770 void
 771 ev_view_scroll (EvView        *view,
 772                 GtkScrollType  scroll,
 773                 gboolean       horizontal)
 774 {
 775         GtkAdjustment *adjustment;
 776         double value, increment;
 777         gboolean first_page = FALSE;
 778         gboolean last_page = FALSE;
 779
 780         view->jump_to_find_result = FALSE;
 781
 782         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 783                 switch (scroll) {
 784                         case GTK_SCROLL_PAGE_BACKWARD:
 785                         case GTK_SCROLL_STEP_BACKWARD:
 786                                 ev_view_previous_page (view);
 787                                 break;
 788                         case GTK_SCROLL_PAGE_FORWARD:
 789                         case GTK_SCROLL_STEP_FORWARD:
 790                                 ev_view_next_page (view);
 791                                 break;
 792                         default:
 793                                 break;
 794                 }
 795                 return;
 796         }
 797
 798         /* Assign values for increment and vertical adjustment */
 799         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 800         increment = adjustment->page_size * 0.75;
 801         value = adjustment->value;
 802
 803         /* Assign boolean for first and last page */
 804         if (view->current_page == 0)
 805                 first_page = TRUE;
 806         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 807                 last_page = TRUE;
 808
 809         switch (scroll) {
 810                 case GTK_SCROLL_PAGE_BACKWARD:
 811                         /* Do not jump backwards if at the first page */
 812                         if (value == (adjustment->lower) && first_page) {
 813                                 /* Do nothing */
 814                                 /* At the top of a page, assign the upper bound limit of previous page */
 815                         } else if (value == (adjustment->lower)) {
 816                                 value = adjustment->upper - adjustment->page_size;
 817                                 ev_view_previous_page (view);
 818                                 /* Jump to the top */
 819                         } else {
 820                                 value = MAX (value - increment, adjustment->lower);
 821                         }
 822                         break;
 823                 case GTK_SCROLL_PAGE_FORWARD:
 824                         /* Do not jump forward if at the last page */
 825                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 826                                 /* Do nothing */
 827                         /* At the bottom of a page, assign the lower bound limit of next page */
 828                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 829                                 value = 0;
 830                                 ev_view_next_page (view);
 831                         /* Jump to the bottom */
 832                         } else {
 833                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 834                         }
 835                         break;
 836                 case GTK_SCROLL_STEP_BACKWARD:
 837                         value -= adjustment->step_increment;
 838                         break;
 839                 case GTK_SCROLL_STEP_FORWARD:
 840                         value += adjustment->step_increment;
 841                         break;
 842                 case GTK_SCROLL_STEP_DOWN:
 843                         value -= adjustment->step_increment / 10;
 844                         break;
 845                 case GTK_SCROLL_STEP_UP:
 846                         value += adjustment->step_increment / 10;
 847                         break;
 848                 default:
 849                         break;
 850         }
 851
 852         value = CLAMP (value, adjustment->lower,
 853                        adjustment->upper - adjustment->page_size);
 854
 855         gtk_adjustment_set_value (adjustment, value);
 856 }
 857
 858 #define MARGIN 5
 859
 860 static void
 861 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 862 {
 863         GtkWidget *widget = GTK_WIDGET (view);
 864         GtkAdjustment *adjustment;
 865         int value;
 866
 867         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 868
 869         adjustment = view->vadjustment;
 870
 871         if (rect->y < adjustment->value) {
 872                 value = MAX (adjustment->lower, rect->y - MARGIN);
 873                 gtk_adjustment_set_value (view->vadjustment, value);
 874         } else if (rect->y + rect->height >
 875                    adjustment->value + widget->allocation.height) {
 876                 value = MIN (adjustment->upper, rect->y + rect->height -
 877                              widget->allocation.height + MARGIN);
 878                 gtk_adjustment_set_value (view->vadjustment, value);
 879         }
 880
 881         adjustment = view->hadjustment;
 882
 883         if (rect->x < adjustment->value) {
 884                 value = MAX (adjustment->lower, rect->x - MARGIN);
 885                 gtk_adjustment_set_value (view->hadjustment, value);
 886         } else if (rect->x + rect->height >
 887                    adjustment->value + widget->allocation.width) {
 888                 value = MIN (adjustment->upper, rect->x + rect->width -
 889                              widget->allocation.width + MARGIN);
 890                 gtk_adjustment_set_value (view->hadjustment, value);
 891         }
 892
 893         gtk_widget_queue_resize (GTK_WIDGET (view));
 894 }
 895
 896 /*** Geometry computations ***/
 897
 898 static void
 899 compute_border (EvView *view, int width, int height, GtkBorder *border)
 900 {
 901         if (view->presentation) {
 902                 border->left = 0;
 903                 border->right = 0;
 904                 border->top = 0;
 905                 border->bottom = 0;
 906         } else {
 907                 ev_document_misc_get_page_border_size (width, height, border);
 908         }
 909 }
 910
 911 void
 912 _get_page_size_for_scale_and_rotation (EvDocument *document,
 913                                        gint        page,
 914                                        gdouble     scale,
 915                                        gint        rotation,
 916                                        gint       *page_width,
 917                                        gint       *page_height)
 918 {
 919         gdouble w, h;
 920         gint    width, height;
 921
 922         ev_document_get_page_size (document, page, &w, &h);
 923
 924         width = (gint)(w * scale + 0.5);
 925         height = (gint)(h * scale + 0.5);
 926
 927         if (page_width)
 928                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
 929         if (page_height)
 930                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
 931 }
 932
 933 static void
 934 ev_view_get_page_size (EvView *view,
 935                        gint    page,
 936                        gint   *page_width,
 937                        gint   *page_height)
 938 {
 939         _get_page_size_for_scale_and_rotation (view->document,
 940                                                page,
 941                                                view->scale,
 942                                                view->rotation,
 943                                                page_width,
 944                                                page_height);
 945 }
 946
 947 static void
 948 ev_view_get_max_page_size (EvView *view,
 949                            gint   *max_width,
 950                            gint   *max_height)
 951 {
 952         double w, h;
 953         gint   width, height;
 954
 955         ev_document_get_max_page_size (view->document, &w, &h);
 956
 957         width = (gint)(w * view->scale + 0.5);
 958         height = (gint)(h * view->scale + 0.5);
 959
 960         if (max_width)
 961                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
 962         if (max_height)
 963                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
 964 }
 965
 966 static void
 967 get_page_y_offset (EvView *view, int page, int *y_offset)
 968 {
 969         int max_width, offset;
 970         GtkBorder border;
 971
 972         g_return_if_fail (y_offset != NULL);
 973
 974         ev_view_get_max_page_size (view, &max_width, NULL);
 975         compute_border (view, max_width, max_width, &border);
 976
 977         if (view->dual_page) {
 978                 ev_view_get_height_to_page (view, page, NULL, &offset);
 979                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
 980                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
 981         } else {
 982                 ev_view_get_height_to_page (view, page, &offset, NULL);
 983                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 984         }
 985
 986         *y_offset = offset;
 987         return;
 988 }
 989
 990 static gboolean
 991 get_page_extents (EvView       *view,
 992                   gint          page,
 993                   GdkRectangle *page_area,
 994                   GtkBorder    *border)
 995 {
 996         GtkWidget *widget;
 997         int width, height;
 998
 999         widget = GTK_WIDGET (view);
1000
1001         /* Get the size of the page */
1002         ev_view_get_page_size (view, page, &width, &height);
1003         compute_border (view, width, height, border);
1004         page_area->width = width + border->left + border->right;
1005         page_area->height = height + border->top + border->bottom;
1006
1007         if (view->presentation) {
1008                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
1009                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
1010         } else if (view->continuous) {
1011                 gint max_width;
1012                 gint x, y;
1013
1014                 ev_view_get_max_page_size (view, &max_width, NULL);
1015                 max_width = max_width + border->left + border->right;
1016                 /* Get the location of the bounding box */
1017                 if (view->dual_page) {
1018                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1019                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1020                         if (page % 2 == get_dual_even_left (view))
1021                                 x = x + (max_width - width - border->left - border->right);
1022                 } else {
1023                         x = view->spacing;
1024                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1025                 }
1026
1027                 get_page_y_offset (view, page, &y);
1028
1029                 page_area->x = x;
1030                 page_area->y = y;
1031         } else {
1032                 gint x, y;
1033                 if (view->dual_page) {
1034                         gint width_2, height_2;
1035                         gint max_width = width;
1036                         gint max_height = height;
1037                         GtkBorder overall_border;
1038                         gint other_page;
1039
1040                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1041
1042                         /* First, we get the bounding box of the two pages */
1043                         if (other_page < ev_document_get_n_pages (view->document)
1044                             && (0 <= other_page)) {
1045                                 ev_view_get_page_size (view, other_page,
1046                                                        &width_2, &height_2);
1047                                 if (width_2 > width)
1048                                         max_width = width_2;
1049                                 if (height_2 > height)
1050                                         max_height = height_2;
1051                         }
1052                         compute_border (view, max_width, max_height, &overall_border);
1053
1054                         /* Find the offsets */
1055                         x = view->spacing;
1056                         y = view->spacing;
1057
1058                         /* Adjust for being the left or right page */
1059                         if (page % 2 == get_dual_even_left (view))
1060                                 x = x + max_width - width;
1061                         else
1062                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1063
1064                         y = y + (max_height - height)/2;
1065
1066                         /* Adjust for extra allocation */
1067                         x = x + MAX (0, widget->allocation.width -
1068                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1069                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1070                 } else {
1071                         x = view->spacing;
1072                         y = view->spacing;
1073
1074                         /* Adjust for extra allocation */
1075                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1076                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1077                 }
1078
1079                 page_area->x = x;
1080                 page_area->y = y;
1081         }
1082
1083         return TRUE;
1084 }
1085
1086 static void
1087 get_doc_page_size (EvView  *view,
1088                    gint     page,
1089                    gdouble *width,
1090                    gdouble *height)
1091 {
1092         double w, h;
1093
1094         ev_document_get_page_size (view->document, page, &w, &h);
1095         if (view->rotation == 0 || view->rotation == 180) {
1096                 if (width) *width = w;
1097                 if (height) *height = h;
1098         } else {
1099                 if (width) *width = h;
1100                 if (height) *height = w;
1101         }
1102 }
1103
1104 static void
1105 view_point_to_doc_point (EvView *view,
1106                          GdkPoint *view_point,
1107                          GdkRectangle *page_area,
1108                          double  *doc_point_x,
1109                          double  *doc_point_y)
1110 {
1111         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1112         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1113 }
1114
1115 static void
1116 view_rect_to_doc_rect (EvView *view,
1117                        GdkRectangle *view_rect,
1118                        GdkRectangle *page_area,
1119                        EvRectangle  *doc_rect)
1120 {
1121         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1122         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1123         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1124         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1125 }
1126
1127 static void
1128 doc_point_to_view_point (EvView       *view,
1129                          int           page,
1130                          EvPoint      *doc_point,
1131                          GdkPoint     *view_point)
1132 {
1133         GdkRectangle page_area;
1134         GtkBorder border;
1135         double x, y, view_x, view_y;
1136         gdouble width, height;
1137
1138         get_doc_page_size (view, page, &width, &height);
1139
1140         if (view->rotation == 0) {
1141                 x = doc_point->x;
1142                 y = doc_point->y;
1143         } else if (view->rotation == 90) {
1144                 x = width - doc_point->y;
1145                 y = doc_point->x;
1146         } else if (view->rotation == 180) {
1147                 x = width - doc_point->x;
1148                 y = height - doc_point->y;
1149         } else if (view->rotation == 270) {
1150                 x = doc_point->y;
1151                 y = height - doc_point->x;
1152         } else {
1153                 g_assert_not_reached ();
1154         }
1155
1156         get_page_extents (view, page, &page_area, &border);
1157
1158         view_x = CLAMP (x * view->scale, 0, page_area.width);
1159         view_y = CLAMP (y * view->scale, 0, page_area.height);
1160         view_point->x = view_x + page_area.x;
1161         view_point->y = view_y + page_area.y;
1162 }
1163
1164 static void
1165 doc_rect_to_view_rect (EvView       *view,
1166                        int           page,
1167                        EvRectangle  *doc_rect,
1168                        GdkRectangle *view_rect)
1169 {
1170         GdkRectangle page_area;
1171         GtkBorder border;
1172         double x, y, w, h;
1173         gdouble width, height;
1174
1175         get_doc_page_size (view, page, &width, &height);
1176
1177         if (view->rotation == 0) {
1178                 x = doc_rect->x1;
1179                 y = doc_rect->y1;
1180                 w = doc_rect->x2 - doc_rect->x1;
1181                 h = doc_rect->y2 - doc_rect->y1;
1182         } else if (view->rotation == 90) {
1183                 x = width - doc_rect->y2;
1184                 y = doc_rect->x1;
1185                 w = doc_rect->y2 - doc_rect->y1;
1186                 h = doc_rect->x2 - doc_rect->x1;
1187         } else if (view->rotation == 180) {
1188                 x = width - doc_rect->x2;
1189                 y = height - doc_rect->y2;
1190                 w = doc_rect->x2 - doc_rect->x1;
1191                 h = doc_rect->y2 - doc_rect->y1;
1192         } else if (view->rotation == 270) {
1193                 x = doc_rect->y1;
1194                 y = height - doc_rect->x2;
1195                 w = doc_rect->y2 - doc_rect->y1;
1196                 h = doc_rect->x2 - doc_rect->x1;
1197         } else {
1198                 g_assert_not_reached ();
1199         }
1200
1201         get_page_extents (view, page, &page_area, &border);
1202
1203         view_rect->x = x * view->scale + page_area.x;
1204         view_rect->y = y * view->scale + page_area.y;
1205         view_rect->width = w * view->scale;
1206         view_rect->height = h * view->scale;
1207 }
1208
1209 static gboolean
1210 get_dual_even_left (EvView *view)
1211 {
1212         return (ev_document_get_n_pages (view->document) > 2);
1213 }
1214
1215 static void
1216 find_page_at_location (EvView  *view,
1217                        gdouble  x,
1218                        gdouble  y,
1219                        gint    *page,
1220                        gint    *x_offset,
1221                        gint    *y_offset)
1222 {
1223         int i;
1224
1225         if (view->document == NULL)
1226                 return;
1227
1228         g_assert (page);
1229         g_assert (x_offset);
1230         g_assert (y_offset);
1231
1232         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1233                 GdkRectangle page_area;
1234                 GtkBorder border;
1235
1236                 if (! get_page_extents (view, i, &page_area, &border))
1237                         continue;
1238
1239                 if ((x >= page_area.x + border.left) &&
1240                     (x < page_area.x + page_area.width - border.right) &&
1241                     (y >= page_area.y + border.top) &&
1242                     (y < page_area.y + page_area.height - border.bottom)) {
1243                         *page = i;
1244                         *x_offset = x - (page_area.x + border.left);
1245                         *y_offset = y - (page_area.y + border.top);
1246                         return;
1247                 }
1248         }
1249
1250         *page = -1;
1251 }
1252
1253 static gboolean
1254 location_in_text (EvView  *view,
1255                   gdouble  x,
1256                   gdouble  y)
1257 {
1258         GdkRegion *region;
1259         gint page = -1;
1260         gint x_offset = 0, y_offset = 0;
1261
1262         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1263
1264         if (page == -1)
1265                 return FALSE;
1266
1267         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1268
1269         if (region)
1270                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1271         else
1272                 return FALSE;
1273 }
1274
1275 static int
1276 ev_view_get_width (EvView *view)
1277 {
1278         return GTK_WIDGET (view)->allocation.width;
1279 }
1280
1281 static int
1282 ev_view_get_height (EvView *view)
1283 {
1284         return GTK_WIDGET (view)->allocation.height;
1285 }
1286
1287 static gboolean
1288 location_in_selected_text (EvView  *view,
1289                            gdouble  x,
1290                            gdouble  y)
1291 {
1292         gint page = -1;
1293         gint x_offset = 0, y_offset = 0;
1294         EvViewSelection *selection;
1295         GList *l = NULL;
1296
1297         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1298                 selection = (EvViewSelection *)l->data;
1299
1300                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1301
1302                 if (page != selection->page)
1303                         continue;
1304
1305                 if (selection->covered_region &&
1306                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1307                         return TRUE;
1308         }
1309
1310         return FALSE;
1311 }
1312
1313 static gboolean
1314 get_doc_point_from_offset (EvView *view,
1315                            gint    page,
1316                            gint    x_offset,
1317                            gint    y_offset,
1318                            gint   *x_new,
1319                            gint   *y_new)
1320 {
1321         gdouble width, height;
1322         double x, y;
1323
1324         get_doc_page_size (view, page, &width, &height);
1325
1326         x_offset = x_offset / view->scale;
1327         y_offset = y_offset / view->scale;
1328
1329         if (view->rotation == 0) {
1330                 x = x_offset;
1331                 y = y_offset;
1332         } else if (view->rotation == 90) {
1333                 x = y_offset;
1334                 y = width - x_offset;
1335         } else if (view->rotation == 180) {
1336                 x = width - x_offset;
1337                 y = height - y_offset;
1338         } else if (view->rotation == 270) {
1339                 x = height - y_offset;
1340                 y = x_offset;
1341         } else {
1342                 g_assert_not_reached ();
1343         }
1344
1345         *x_new = x;
1346         *y_new = y;
1347
1348         return TRUE;
1349 }
1350
1351 static gboolean
1352 get_doc_point_from_location (EvView  *view,
1353                              gdouble  x,
1354                              gdouble  y,
1355                              gint    *page,
1356                              gint    *x_new,
1357                              gint    *y_new)
1358 {
1359         gint x_offset = 0, y_offset = 0;
1360
1361         x += view->scroll_x;
1362         y += view->scroll_y;
1363         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1364         if (*page == -1)
1365                 return FALSE;
1366
1367         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1368 }
1369
1370 static void
1371 ev_view_get_area_from_mapping (EvView       *view,
1372                                guint         page,
1373                                GList        *mapping_list,
1374                                gconstpointer data,
1375                                GdkRectangle *area)
1376 {
1377         EvMapping *mapping;
1378
1379         mapping = ev_mapping_list_find (mapping_list, data);
1380         doc_rect_to_view_rect (view, page, &mapping->area, area);
1381         area->x -= view->scroll_x;
1382         area->y -= view->scroll_y;
1383 }
1384
1385
1386 /*** Hyperref ***/
1387 static EvLink *
1388 ev_view_get_link_at_location (EvView  *view,
1389                               gdouble  x,
1390                               gdouble  y)
1391 {
1392         gint page = -1;
1393         gint x_new = 0, y_new = 0;
1394         GList *link_mapping;
1395
1396         if (!EV_IS_DOCUMENT_LINKS (view->document))
1397                 return NULL;
1398
1399         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1400                 return NULL;
1401
1402         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1403
1404         if (link_mapping)
1405                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1406         else
1407                 return NULL;
1408 }
1409
1410 static void
1411 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1412 {
1413         EvPoint doc_point;
1414         gdouble zoom, left, top;
1415         gboolean change_left, change_top;
1416
1417         left = ev_link_dest_get_left (dest, &change_left);
1418         top = ev_link_dest_get_top (dest, &change_top);
1419
1420         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1421                                        ev_link_dest_get_bottom (dest) - top,
1422                                        ev_view_get_width (view),
1423                                        ev_view_get_height (view));
1424
1425         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1426         ev_document_model_set_scale (view->model, zoom);
1427
1428         doc_point.x = change_left ? left : 0;
1429         doc_point.y = change_top ? top : 0;
1430         view->pending_point = doc_point;
1431
1432         ev_view_change_page (view, ev_link_dest_get_page (dest), TRUE);
1433 }
1434
1435 static void
1436 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1437 {
1438         EvPoint doc_point;
1439         gdouble doc_width, doc_height;
1440         gint page;
1441         double zoom, left;
1442         gboolean change_left;
1443
1444         page = ev_link_dest_get_page (dest);
1445         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1446
1447         left = ev_link_dest_get_left (dest, &change_left);
1448         doc_point.x = change_left ? left : 0;
1449         doc_point.y = 0;
1450
1451         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1452                                          ev_view_get_width (view),
1453                                          ev_view_get_height (view));
1454
1455         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1456         ev_document_model_set_scale (view->model, zoom);
1457
1458         view->pending_point = doc_point;
1459
1460         ev_view_change_page (view, page, TRUE);
1461 }
1462
1463 static void
1464 goto_fith_dest (EvView *view, EvLinkDest *dest)
1465 {
1466         EvPoint doc_point;
1467         gdouble doc_width, doc_height;
1468         gint page;
1469         gdouble zoom, top;
1470         gboolean change_top;
1471
1472         page = ev_link_dest_get_page (dest);
1473         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1474
1475         top = ev_link_dest_get_top (dest, &change_top);
1476
1477         doc_point.x = 0;
1478         doc_point.y = change_top ? top : 0;
1479
1480         zoom = zoom_for_size_fit_width (doc_width, top,
1481                                         ev_view_get_width (view),
1482                                         ev_view_get_height (view));
1483
1484         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1485         ev_document_model_set_scale (view->model, zoom);
1486
1487         view->pending_point = doc_point;
1488
1489         ev_view_change_page (view, page, TRUE);
1490 }
1491
1492 static void
1493 goto_fit_dest (EvView *view, EvLinkDest *dest)
1494 {
1495         double zoom;
1496         gdouble doc_width, doc_height;
1497         int page;
1498
1499         page = ev_link_dest_get_page (dest);
1500         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1501
1502         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1503                                        ev_view_get_width (view),
1504                                        ev_view_get_height (view));
1505
1506         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1507         ev_document_model_set_scale (view->model, zoom);
1508
1509         ev_view_change_page (view, page, TRUE);
1510 }
1511
1512 static void
1513 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1514 {
1515         EvPoint doc_point;
1516         gint page;
1517         gdouble zoom, left, top;
1518         gboolean change_zoom, change_left, change_top;
1519
1520         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1521         page = ev_link_dest_get_page (dest);
1522
1523         if (change_zoom && zoom > 1) {
1524                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1525                 ev_document_model_set_scale (view->model, zoom);
1526         }
1527
1528         left = ev_link_dest_get_left (dest, &change_left);
1529         top = ev_link_dest_get_top (dest, &change_top);
1530
1531         doc_point.x = change_left ? left : 0;
1532         doc_point.y = change_top ? top : 0;
1533         view->pending_point = doc_point;
1534
1535         ev_view_change_page (view, page, TRUE);
1536 }
1537
1538 static void
1539 goto_dest (EvView *view, EvLinkDest *dest)
1540 {
1541         EvLinkDestType type;
1542         int page, n_pages, current_page;
1543
1544         page = ev_link_dest_get_page (dest);
1545         n_pages = ev_document_get_n_pages (view->document);
1546
1547         if (page < 0 || page >= n_pages)
1548                 return;
1549
1550         current_page = view->current_page;
1551
1552         type = ev_link_dest_get_dest_type (dest);
1553
1554         switch (type) {
1555                 case EV_LINK_DEST_TYPE_PAGE:
1556                         ev_document_model_set_page (view->model, page);
1557                         break;
1558                 case EV_LINK_DEST_TYPE_FIT:
1559                         goto_fit_dest (view, dest);
1560                         break;
1561                 case EV_LINK_DEST_TYPE_FITH:
1562                         goto_fith_dest (view, dest);
1563                         break;
1564                 case EV_LINK_DEST_TYPE_FITV:
1565                         goto_fitv_dest (view, dest);
1566                         break;
1567                 case EV_LINK_DEST_TYPE_FITR:
1568                         goto_fitr_dest (view, dest);
1569                         break;
1570                 case EV_LINK_DEST_TYPE_XYZ:
1571                         goto_xyz_dest (view, dest);
1572                         break;
1573                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1574                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1575                         break;
1576                 default:
1577                         g_assert_not_reached ();
1578         }
1579
1580         if (current_page != view->current_page)
1581                 ev_document_model_set_page (view->model, view->current_page);
1582 }
1583
1584 static void
1585 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1586 {
1587         EvLinkDestType type;
1588
1589         type = ev_link_dest_get_dest_type (dest);
1590
1591         if (type == EV_LINK_DEST_TYPE_NAMED) {
1592                 EvLinkDest  *dest2;
1593                 const gchar *named_dest;
1594
1595                 named_dest = ev_link_dest_get_named_dest (dest);
1596                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1597                                                           named_dest);
1598                 if (dest2) {
1599                         goto_dest (view, dest2);
1600                         g_object_unref (dest2);
1601                 }
1602
1603                 return;
1604         }
1605
1606         goto_dest (view, dest);
1607 }
1608
1609 void
1610 ev_view_handle_link (EvView *view, EvLink *link)
1611 {
1612         EvLinkAction    *action = NULL;
1613         EvLinkActionType type;
1614
1615         action = ev_link_get_action (link);
1616         if (!action)
1617                 return;
1618
1619         type = ev_link_action_get_action_type (action);
1620
1621         switch (type) {
1622                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1623                         EvLinkDest *dest;
1624
1625                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1626
1627                         dest = ev_link_action_get_dest (action);
1628                         ev_view_goto_dest (view, dest);
1629                 }
1630                         break;
1631                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1632                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1633                 case EV_LINK_ACTION_TYPE_LAUNCH:
1634                 case EV_LINK_ACTION_TYPE_NAMED:
1635                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1636                         break;
1637         }
1638 }
1639
1640 gchar *
1641 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1642 {
1643         EvLinkDestType type;
1644         gchar *msg = NULL;
1645
1646         type = ev_link_dest_get_dest_type (dest);
1647
1648         switch (type) {
1649                 case EV_LINK_DEST_TYPE_NAMED: {
1650                         EvLinkDest  *dest2;
1651                         const gchar *named_dest;
1652
1653                         named_dest = ev_link_dest_get_named_dest (dest);
1654                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1655                                                                   named_dest);
1656                         if (dest2) {
1657                                 msg = ev_document_get_page_label (view->document,
1658                                                                   ev_link_dest_get_page (dest2));
1659                                 g_object_unref (dest2);
1660                         }
1661                 }
1662
1663                         break;
1664                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1665                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1666                 }
1667                         break;
1668                 default:
1669                         msg = ev_document_get_page_label (view->document,
1670                                                           ev_link_dest_get_page (dest));
1671         }
1672
1673         return msg;
1674 }
1675
1676 static char *
1677 tip_from_action_named (EvLinkAction *action)
1678 {
1679         const gchar *name = ev_link_action_get_name (action);
1680
1681         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1682                 return g_strdup (_("Go to first page"));
1683         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1684                 return g_strdup (_("Go to previous page"));
1685         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1686                 return g_strdup (_("Go to next page"));
1687         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1688                 return g_strdup (_("Go to last page"));
1689         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1690                 return g_strdup (_("Go to page"));
1691         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1692                 return g_strdup (_("Find"));
1693         }
1694
1695         return NULL;
1696 }
1697
1698 static char *
1699 tip_from_link (EvView *view, EvLink *link)
1700 {
1701         EvLinkAction *action;
1702         EvLinkActionType type;
1703         char *msg = NULL;
1704         char *page_label;
1705         const char *title;
1706
1707         action = ev_link_get_action (link);
1708         title = ev_link_get_title (link);
1709
1710         if (!action)
1711                 return title ? g_strdup (title) : NULL;
1712
1713         type = ev_link_action_get_action_type (action);
1714
1715         switch (type) {
1716                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1717                         page_label = ev_view_page_label_from_dest (view,
1718                                                                    ev_link_action_get_dest (action));
1719                         if (page_label) {
1720                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1721                                 g_free (page_label);
1722                         }
1723                         break;
1724                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1725                         if (title) {
1726                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1727                                                        ev_link_action_get_filename (action));
1728                         } else {
1729                                 msg = g_strdup_printf (_("Go to file “%s”"),
1730                                                        ev_link_action_get_filename (action));
1731                         }
1732                         break;
1733                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1734                         msg = g_strdup (ev_link_action_get_uri (action));
1735                         break;
1736                 case EV_LINK_ACTION_TYPE_LAUNCH:
1737                         msg = g_strdup_printf (_("Launch %s"),
1738                                                ev_link_action_get_filename (action));
1739                         break;
1740                 case EV_LINK_ACTION_TYPE_NAMED:
1741                         msg = tip_from_action_named (action);
1742                         break;
1743                 default:
1744                         if (title)
1745                                 msg = g_strdup (title);
1746                         break;
1747         }
1748
1749         return msg;
1750 }
1751
1752 static void
1753 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1754 {
1755         EvLink       *link;
1756         EvFormField  *field;
1757         EvAnnotation *annot = NULL;
1758
1759         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1760                 return;
1761
1762         if (view->drag_info.in_drag) {
1763                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1764                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1765                 return;
1766         }
1767
1768         if (view->scroll_info.autoscrolling) {
1769                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1770                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1771                 return;
1772         }
1773
1774         link = ev_view_get_link_at_location (view, x, y);
1775         if (link) {
1776                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1777         } else if ((field = ev_view_get_form_field_at_location (view, x, y))) {
1778                 if (field->is_read_only) {
1779                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1780                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1781                             view->cursor == EV_VIEW_CURSOR_DRAG)
1782                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1783                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1784                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1785                 } else {
1786                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1787                 }
1788         } else if ((annot = ev_view_get_annotation_at_location (view, x, y))) {
1789                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1790         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1791                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1792         } else {
1793                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1794                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1795                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1796                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1797                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1798         }
1799
1800         if (link || annot)
1801                 g_object_set (view, "has-tooltip", TRUE, NULL);
1802 }
1803
1804 /*** Images ***/
1805 static EvImage *
1806 ev_view_get_image_at_location (EvView  *view,
1807                                gdouble  x,
1808                                gdouble  y)
1809 {
1810         gint page = -1;
1811         gint x_new = 0, y_new = 0;
1812         GList *image_mapping;
1813
1814         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1815                 return NULL;
1816
1817         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1818                 return NULL;
1819
1820         image_mapping = ev_pixbuf_cache_get_image_mapping (view->pixbuf_cache, page);
1821
1822         if (image_mapping)
1823                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1824         else
1825                 return NULL;
1826 }
1827
1828 /*** Forms ***/
1829 static EvFormField *
1830 ev_view_get_form_field_at_location (EvView  *view,
1831                                     gdouble  x,
1832                                     gdouble  y)
1833 {
1834         gint page = -1;
1835         gint x_new = 0, y_new = 0;
1836         GList *forms_mapping;
1837
1838         if (!EV_IS_DOCUMENT_FORMS (view->document))
1839                 return NULL;
1840
1841         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1842                 return NULL;
1843
1844         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, page);
1845
1846         if (forms_mapping)
1847                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1848         else
1849                 return NULL;
1850 }
1851
1852 static GdkRegion *
1853 ev_view_form_field_get_region (EvView      *view,
1854                                EvFormField *field)
1855 {
1856         GdkRectangle view_area;
1857         GList       *forms_mapping;
1858
1859         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1860                                                                 field->page->index);
1861         ev_view_get_area_from_mapping (view, field->page->index,
1862                                        forms_mapping,
1863                                        field, &view_area);
1864
1865         return gdk_region_rectangle (&view_area);
1866 }
1867
1868 static gboolean
1869 ev_view_forms_remove_widgets (EvView *view)
1870 {
1871         ev_view_remove_all (view);
1872
1873         return FALSE;
1874 }
1875
1876 static void
1877 ev_view_form_field_destroy (GtkWidget *widget,
1878                             EvView    *view)
1879 {
1880         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1881 }
1882
1883 static GtkWidget *
1884 ev_view_form_field_button_create_widget (EvView      *view,
1885                                          EvFormField *field)
1886 {
1887         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
1888         GdkRegion         *field_region = NULL;
1889
1890         switch (field_button->type) {
1891                 case EV_FORM_FIELD_BUTTON_PUSH:
1892                         return NULL;
1893                 case EV_FORM_FIELD_BUTTON_CHECK:
1894                 case EV_FORM_FIELD_BUTTON_RADIO: {
1895                         gboolean  state;
1896                         GList    *forms_mapping, *l;
1897
1898                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
1899                                                                                field);
1900
1901                         /* FIXME: it actually depends on NoToggleToOff flags */
1902                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
1903                             state && field_button->state)
1904                                 return NULL;
1905
1906                         field_region = ev_view_form_field_get_region (view, field);
1907
1908                         /* For radio buttons and checkbox buttons that are in a set
1909                          * we need to update also the region for the current selected item
1910                          */
1911                         forms_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
1912                                                                                 field->page->index);
1913                         for (l = forms_mapping; l; l = g_list_next (l)) {
1914                                 EvFormField *button = ((EvMapping *)(l->data))->data;
1915                                 GdkRegion   *button_region;
1916
1917                                 if (button->id == field->id)
1918                                         continue;
1919
1920                                 /* FIXME: only buttons in the same group should be updated */
1921                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
1922                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
1923                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
1924                                         continue;
1925
1926                                 button_region = ev_view_form_field_get_region (view, button);
1927                                 gdk_region_union (field_region, button_region);
1928                                 gdk_region_destroy (button_region);
1929                         }
1930
1931                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
1932                                                                        field, !state);
1933                         field_button->state = !state;
1934                 }
1935                         break;
1936         }
1937
1938         ev_view_reload_page (view, field->page->index, field_region);
1939         gdk_region_destroy (field_region);
1940
1941         return NULL;
1942 }
1943
1944 static void
1945 ev_view_form_field_text_save (EvView    *view,
1946                               GtkWidget *widget)
1947 {
1948         EvFormField *field;
1949
1950         if (!view->document)
1951                 return;
1952
1953         field = g_object_get_data (G_OBJECT (widget), "form-field");
1954
1955         if (field->changed) {
1956                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1957                 GdkRegion       *field_region;
1958
1959                 field_region = ev_view_form_field_get_region (view, field);
1960
1961                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
1962                                                             field, field_text->text);
1963                 field->changed = FALSE;
1964                 ev_view_reload_page (view, field->page->index, field_region);
1965                 gdk_region_destroy (field_region);
1966         }
1967 }
1968
1969 static void
1970 ev_view_form_field_text_changed (GtkWidget   *widget,
1971                                  EvFormField *field)
1972 {
1973         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1974         gchar           *text = NULL;
1975
1976         if (GTK_IS_ENTRY (widget)) {
1977                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
1978         } else if (GTK_IS_TEXT_BUFFER (widget)) {
1979                 GtkTextIter start, end;
1980
1981                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
1982                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
1983                                                  &start, &end, FALSE);
1984         }
1985
1986         if (!field_text->text ||
1987             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
1988                 g_free (field_text->text);
1989                 field_text->text = text;
1990                 field->changed = TRUE;
1991         }
1992 }
1993
1994 static GtkWidget *
1995 ev_view_form_field_text_create_widget (EvView      *view,
1996                                        EvFormField *field)
1997 {
1998         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
1999         GtkWidget       *text = NULL;
2000         gchar           *txt;
2001
2002         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2003                                                           field);
2004
2005         switch (field_text->type) {
2006                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2007                         /* TODO */
2008                 case EV_FORM_FIELD_TEXT_NORMAL:
2009                         text = gtk_entry_new ();
2010                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2011                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2012                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2013
2014                         if (txt) {
2015                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2016                                 g_free (txt);
2017                         }
2018
2019                         g_signal_connect (text, "changed",
2020                                           G_CALLBACK (ev_view_form_field_text_changed),
2021                                           field);
2022                         g_signal_connect_after (text, "activate",
2023                                                 G_CALLBACK (ev_view_form_field_destroy),
2024                                                 view);
2025                         break;
2026                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2027                         GtkTextBuffer *buffer;
2028
2029                         text = gtk_text_view_new ();
2030                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2031
2032                         if (txt) {
2033                                 gtk_text_buffer_set_text (buffer, txt, -1);
2034                                 g_free (txt);
2035                         }
2036
2037                         g_signal_connect (buffer, "changed",
2038                                           G_CALLBACK (ev_view_form_field_text_changed),
2039                                           field);
2040                 }
2041                         break;
2042         }
2043
2044         g_object_weak_ref (G_OBJECT (text),
2045                            (GWeakNotify)ev_view_form_field_text_save,
2046                            view);
2047
2048         return text;
2049 }
2050
2051 static void
2052 ev_view_form_field_choice_save (EvView    *view,
2053                                 GtkWidget *widget)
2054 {
2055         EvFormField *field;
2056
2057         if (!view->document)
2058                 return;
2059
2060         field = g_object_get_data (G_OBJECT (widget), "form-field");
2061
2062         if (field->changed) {
2063                 GList             *l;
2064                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2065                 GdkRegion         *field_region;
2066
2067                 field_region = ev_view_form_field_get_region (view, field);
2068
2069                 if (field_choice->is_editable) {
2070                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2071                                                                       field, field_choice->text);
2072                 } else {
2073                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2074                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2075                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2076                                                                                  field,
2077                                                                                  GPOINTER_TO_INT (l->data));
2078                         }
2079                 }
2080                 field->changed = FALSE;
2081                 ev_view_reload_page (view, field->page->index, field_region);
2082                 gdk_region_destroy (field_region);
2083         }
2084 }
2085
2086 static void
2087 ev_view_form_field_choice_changed (GtkWidget   *widget,
2088                                    EvFormField *field)
2089 {
2090         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2091
2092         if (GTK_IS_COMBO_BOX (widget)) {
2093                 gint item;
2094
2095                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2096                 if (!field_choice->selected_items ||
2097                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2098                         g_list_free (field_choice->selected_items);
2099                         field_choice->selected_items = NULL;
2100                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2101                                                                        GINT_TO_POINTER (item));
2102                         field->changed = TRUE;
2103                 }
2104
2105                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2106                         gchar *text;
2107
2108                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2109                         if (!field_choice->text ||
2110                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2111                                 g_free (field_choice->text);
2112                                 field_choice->text = text;
2113                                 field->changed = TRUE;
2114                         }
2115                 }
2116         } else if (GTK_IS_TREE_SELECTION (widget)) {
2117                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2118                 GtkTreeModel     *model;
2119                 GList            *items, *l;
2120
2121                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2122                 g_list_free (field_choice->selected_items);
2123                 field_choice->selected_items = NULL;
2124
2125                 for (l = items; l && l->data; l = g_list_next (l)) {
2126                         GtkTreeIter  iter;
2127                         GtkTreePath *path = (GtkTreePath *)l->data;
2128                         gint         item;
2129
2130                         gtk_tree_model_get_iter (model, &iter, path);
2131                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2132
2133                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2134                                                                        GINT_TO_POINTER (item));
2135
2136                         gtk_tree_path_free (path);
2137                 }
2138
2139                 g_list_free (items);
2140
2141                 field->changed = TRUE;
2142         }
2143 }
2144
2145 static GtkWidget *
2146 ev_view_form_field_choice_create_widget (EvView      *view,
2147                                          EvFormField *field)
2148 {
2149         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2150         GtkWidget         *choice;
2151         GtkTreeModel      *model;
2152         gint               n_items, i;
2153         gint               selected_item = 0;
2154
2155         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2156                                                                    field);
2157         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2158         for (i = 0; i < n_items; i++) {
2159                 GtkTreeIter iter;
2160                 gchar      *item;
2161
2162                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2163                                                                      field, i);
2164                 if (ev_document_forms_form_field_choice_is_item_selected (
2165                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2166                         selected_item = i;
2167                         /* FIXME: we need a get_selected_items function in poppler */
2168                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2169                                                                        GINT_TO_POINTER (i));
2170                 }
2171
2172                 if (item) {
2173                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2174                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2175                                             0, item,
2176                                             1, i,
2177                                             -1);
2178                         g_free (item);
2179                 }
2180         }
2181
2182         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2183                 GtkCellRenderer  *renderer;
2184                 GtkWidget        *tree_view;
2185                 GtkTreeSelection *selection;
2186
2187                 tree_view = gtk_tree_view_new_with_model (model);
2188                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2189
2190                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2191                 if (field_choice->multi_select) {
2192                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2193                 }
2194
2195                 /* TODO: set selected items */
2196
2197                 renderer = gtk_cell_renderer_text_new ();
2198                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2199                                                              0,
2200                                                              "choix", renderer,
2201                                                              "text", 0,
2202                                                              NULL);
2203
2204                 choice = gtk_scrolled_window_new (NULL, NULL);
2205                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2206                                                 GTK_POLICY_AUTOMATIC,
2207                                                 GTK_POLICY_AUTOMATIC);
2208                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2209                 gtk_widget_show (tree_view);
2210
2211                 g_signal_connect (selection, "changed",
2212                                   G_CALLBACK (ev_view_form_field_choice_changed),
2213                                   field);
2214                 g_signal_connect_after (selection, "changed",
2215                                         G_CALLBACK (ev_view_form_field_destroy),
2216                                         view);
2217         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2218                 gchar *text;
2219
2220                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2221                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2222                 if (text) {
2223                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2224                         g_free (text);
2225                 }
2226
2227                 g_signal_connect (choice, "changed",
2228                                   G_CALLBACK (ev_view_form_field_choice_changed),
2229                                   field);
2230                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2231                                         G_CALLBACK (ev_view_form_field_destroy),
2232                                         view);
2233         } else { /* ComboBoxText */
2234                 GtkCellRenderer *renderer;
2235
2236                 choice = gtk_combo_box_new_with_model (model);
2237                 renderer = gtk_cell_renderer_text_new ();
2238                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2239                                             renderer, TRUE);
2240                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2241                                                 renderer,
2242                                                 "text", 0,
2243                                                 NULL);
2244                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2245                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2246
2247                 g_signal_connect (choice, "changed",
2248                                   G_CALLBACK (ev_view_form_field_choice_changed),
2249                                   field);
2250                 g_signal_connect_after (choice, "changed",
2251                                         G_CALLBACK (ev_view_form_field_destroy),
2252                                         view);
2253         }
2254
2255         g_object_unref (model);
2256
2257         g_object_weak_ref (G_OBJECT (choice),
2258                            (GWeakNotify)ev_view_form_field_choice_save,
2259                            view);
2260
2261         return choice;
2262 }
2263
2264 static void
2265 ev_view_handle_form_field (EvView      *view,
2266                            EvFormField *field,
2267                            gdouble      x,
2268                            gdouble      y)
2269 {
2270         GtkWidget   *field_widget = NULL;
2271         GList       *form_field_mapping;
2272         GdkRectangle view_area;
2273
2274         if (field->is_read_only)
2275                 return;
2276
2277         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2278                 field_widget = ev_view_form_field_button_create_widget (view, field);
2279         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2280                 field_widget = ev_view_form_field_text_create_widget (view, field);
2281         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2282                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2283         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2284                 /* TODO */
2285         }
2286
2287         /* Form field doesn't require a widget */
2288         if (!field_widget)
2289                 return;
2290
2291         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2292                                 g_object_ref (field),
2293                                 (GDestroyNotify)g_object_unref);
2294
2295         form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache, field->page->index);
2296         ev_view_get_area_from_mapping (view, field->page->index,
2297                                        form_field_mapping,
2298                                        field, &view_area);
2299
2300         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2301         gtk_widget_show (field_widget);
2302         gtk_widget_grab_focus (field_widget);
2303 }
2304
2305 /* Annotations */
2306 static EvViewWindowChild *
2307 ev_view_get_window_child (EvView    *view,
2308                           GtkWidget *window)
2309 {
2310         GList *children = view->window_children;
2311
2312         while (children) {
2313                 EvViewWindowChild *child;
2314
2315                 child = (EvViewWindowChild *)children->data;
2316                 children = children->next;
2317
2318                 if (child->window == window)
2319                         return child;
2320         }
2321
2322         return NULL;
2323 }
2324
2325 static void
2326 ev_view_window_child_move (EvView            *view,
2327                            EvViewWindowChild *child,
2328                            gint               x,
2329                            gint               y)
2330 {
2331         child->x = x;
2332         child->y = y;
2333         gtk_window_move (GTK_WINDOW (child->window),
2334                          MAX (child->parent_x, x),
2335                          MAX (child->parent_y, y));
2336 }
2337
2338 static void
2339 ev_view_window_child_move_with_parent (EvView    *view,
2340                                        GtkWidget *window)
2341 {
2342         EvViewWindowChild *child;
2343         gint               root_x, root_y;
2344
2345         child = ev_view_get_window_child (view, window);
2346         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2347                                &root_x, &root_y);
2348         if (root_x != child->parent_x || root_y != child->parent_y) {
2349                 gint dest_x, dest_y;
2350
2351                 dest_x = child->x + (root_x - child->parent_x);
2352                 dest_y = child->y + (root_y - child->parent_y);
2353                 child->parent_x = root_x;
2354                 child->parent_y = root_y;
2355                 ev_view_window_child_move (view, child, dest_x, dest_y);
2356         }
2357
2358         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2359                 gtk_widget_show (window);
2360 }
2361
2362 static void
2363 ev_view_window_child_put (EvView    *view,
2364                           GtkWidget *window,
2365                           guint      page,
2366                           gint       x,
2367                           gint       y,
2368                           gdouble    orig_x,
2369                           gdouble    orig_y)
2370 {
2371         EvViewWindowChild *child;
2372         gint               root_x, root_y;
2373
2374         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2375                                &root_x, &root_y);
2376
2377         child = g_new0 (EvViewWindowChild, 1);
2378         child->window = window;
2379         child->page = page;
2380         child->orig_x = orig_x;
2381         child->orig_y = orig_y;
2382         child->parent_x = root_x;
2383         child->parent_y = root_y;
2384         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2385         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2386
2387         if (child->visible)
2388                 gtk_widget_show (window);
2389         else
2390                 gtk_widget_hide (window);
2391
2392         view->window_children = g_list_append (view->window_children, child);
2393 }
2394
2395 static EvViewWindowChild *
2396 ev_view_find_window_child_for_annot (EvView       *view,
2397                                      guint         page,
2398                                      EvAnnotation *annot)
2399 {
2400         GList *children = view->window_children;
2401
2402         while (children) {
2403                 EvViewWindowChild *child;
2404                 EvAnnotation      *wannot;
2405
2406                 child = (EvViewWindowChild *)children->data;
2407                 children = children->next;
2408
2409                 if (child->page != page)
2410                         continue;
2411
2412                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2413                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2414                         return child;
2415         }
2416
2417         return NULL;
2418 }
2419
2420 static void
2421 ev_view_window_children_free (EvView *view)
2422 {
2423         GList *l;
2424
2425         if (!view->window_children)
2426                 return;
2427
2428         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2429                 EvViewWindowChild *child;
2430
2431                 child = (EvViewWindowChild *)l->data;
2432                 gtk_widget_destroy (GTK_WIDGET (child->window));
2433                 g_free (child);
2434         }
2435         g_list_free (view->window_children);
2436         view->window_children = NULL;
2437         view->window_child_focus = NULL;
2438 }
2439
2440 static void
2441 annotation_window_grab_focus (GtkWidget *widget,
2442                               EvView    *view)
2443 {
2444         if (view->window_child_focus)
2445                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2446         view->window_child_focus = ev_view_get_window_child (view, widget);
2447 }
2448
2449 static void
2450 annotation_window_closed (EvAnnotationWindow *window,
2451                           EvView             *view)
2452 {
2453         EvViewWindowChild *child;
2454
2455         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2456         child->visible = FALSE;
2457 }
2458
2459 static void
2460 annotation_window_moved (EvAnnotationWindow *window,
2461                          gint                x,
2462                          gint                y,
2463                          EvView             *view)
2464 {
2465         EvViewWindowChild *child;
2466         GdkRectangle       page_area;
2467         GtkBorder          border;
2468         GdkRectangle       view_rect;
2469         EvRectangle        doc_rect;
2470         gint               width, height;
2471
2472         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2473         if (child->x == x && child->y == y)
2474                 return;
2475
2476         child->moved = TRUE;
2477         child->x = x;
2478         child->y = y;
2479
2480         /* Window has been moved by the user,
2481          * we have to set a new origin in doc coords
2482          */
2483         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2484         view_rect.x = (x - child->parent_x) + view->scroll_x;
2485         view_rect.y = (y - child->parent_y) + view->scroll_y;
2486         view_rect.width = width;
2487         view_rect.height = height;
2488
2489         get_page_extents (view, child->page, &page_area, &border);
2490         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2491         child->orig_x = doc_rect.x1;
2492         child->orig_y = doc_rect.y1;
2493 }
2494
2495 static void
2496 ev_view_annotation_save (EvView       *view,
2497                          EvAnnotation *annot)
2498 {
2499         if (!view->document)
2500                 return;
2501
2502         if (!annot->changed)
2503                 return;
2504
2505         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2506                                                          annot, annot->contents);
2507         annot->changed = FALSE;
2508 }
2509
2510 static void
2511 show_annotation_windows (EvView *view,
2512                          gint    page)
2513 {
2514         GList     *annots, *l;
2515         GtkWindow *parent;
2516
2517         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2518
2519         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2520
2521         for (l = annots; l && l->data; l = g_list_next (l)) {
2522                 EvAnnotation      *annot;
2523                 EvViewWindowChild *child;
2524                 GtkWidget         *window;
2525                 EvRectangle       *doc_rect;
2526                 GdkRectangle       view_rect;
2527
2528                 annot = ((EvMapping *)(l->data))->data;
2529
2530                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2531                         continue;
2532
2533                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2534                         continue;
2535
2536                 window = g_object_get_data (G_OBJECT (annot), "popup");
2537                 if (window) {
2538                         ev_view_window_child_move_with_parent (view, window);
2539                         continue;
2540                 }
2541
2542                 /* Look if we already have a popup for this annot */
2543                 child = ev_view_find_window_child_for_annot (view, page, annot);
2544                 window = child ? child->window : NULL;
2545                 if (window) {
2546                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2547                         g_object_set_data (G_OBJECT (annot), "popup", window);
2548                         ev_view_window_child_move_with_parent (view, window);
2549                 } else {
2550                         window = ev_annotation_window_new (annot, parent);
2551                         g_signal_connect (window, "grab_focus",
2552                                           G_CALLBACK (annotation_window_grab_focus),
2553                                           view);
2554                         g_signal_connect (window, "closed",
2555                                           G_CALLBACK (annotation_window_closed),
2556                                           view);
2557                         g_signal_connect (window, "moved",
2558                                           G_CALLBACK (annotation_window_moved),
2559                                           view);
2560                         g_object_set_data (G_OBJECT (annot), "popup", window);
2561
2562                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2563                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2564                         view_rect.x -= view->scroll_x;
2565                         view_rect.y -= view->scroll_y;
2566
2567                         ev_view_window_child_put (view, window, page,
2568                                                   view_rect.x, view_rect.y,
2569                                                   doc_rect->x1, doc_rect->y1);
2570
2571                         g_object_weak_ref (G_OBJECT (annot),
2572                                            (GWeakNotify)ev_view_annotation_save,
2573                                            view);
2574                 }
2575         }
2576 }
2577
2578 static void
2579 hide_annotation_windows (EvView *view,
2580                          gint    page)
2581 {
2582         GList *annots, *l;
2583
2584         annots = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2585
2586         for (l = annots; l && l->data; l = g_list_next (l)) {
2587                 EvAnnotation *annot;
2588                 GtkWidget    *window;
2589
2590                 annot = ((EvMapping *)(l->data))->data;
2591
2592                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2593                         continue;
2594
2595                 window = g_object_get_data (G_OBJECT (annot), "popup");
2596                 if (window)
2597                         gtk_widget_hide (window);
2598         }
2599 }
2600
2601 static EvAnnotation *
2602 ev_view_get_annotation_at_location (EvView  *view,
2603                                     gdouble  x,
2604                                     gdouble  y)
2605 {
2606         gint page = -1;
2607         gint x_new = 0, y_new = 0;
2608         GList *annotations_mapping;
2609
2610         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2611                 return NULL;
2612
2613         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2614                 return NULL;
2615
2616         annotations_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
2617
2618         if (annotations_mapping)
2619                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2620         else
2621                 return NULL;
2622 }
2623
2624 static void
2625 ev_view_handle_annotation (EvView       *view,
2626                            EvAnnotation *annot,
2627                            gdouble       x,
2628                            gdouble       y)
2629 {
2630         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2631                 GtkWidget *window;
2632
2633                 window = g_object_get_data (G_OBJECT (annot), "popup");
2634                 if (window) {
2635                         EvViewWindowChild *child;
2636
2637                         child = ev_view_get_window_child (view, window);
2638                         if (!child->visible) {
2639                                 child->visible = TRUE;
2640                                 ev_view_window_child_move (view, child, child->x, child->y);
2641                                 gtk_widget_show (window);
2642                         }
2643                 }
2644         }
2645 }
2646
2647 /*** GtkWidget implementation ***/
2648
2649 static void
2650 ev_view_size_request_continuous_dual_page (EvView         *view,
2651                                            GtkRequisition *requisition)
2652 {
2653         int max_width;
2654         gint n_pages;
2655         GtkBorder border;
2656
2657         ev_view_get_max_page_size (view, &max_width, NULL);
2658         compute_border (view, max_width, max_width, &border);
2659
2660         n_pages = ev_document_get_n_pages (view->document) + 1;
2661
2662         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2663         get_page_y_offset (view, n_pages, &requisition->height);
2664
2665         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2666                 requisition->width = 1;
2667         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2668                 requisition->width = 1;
2669                 /* FIXME: This could actually be set on one page docs or docs
2670                  * with a strange aspect ratio. */
2671                 /* requisition->height = 1;*/
2672         }
2673 }
2674
2675 static void
2676 ev_view_size_request_continuous (EvView         *view,
2677                                  GtkRequisition *requisition)
2678 {
2679         int max_width;
2680         int n_pages;
2681         GtkBorder border;
2682
2683         ev_view_get_max_page_size (view, &max_width, NULL);
2684         n_pages = ev_document_get_n_pages (view->document);
2685         compute_border (view, max_width, max_width, &border);
2686
2687         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2688         get_page_y_offset (view, n_pages, &requisition->height);
2689
2690         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2691                 requisition->width = 1;
2692         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2693                 requisition->width = 1;
2694                 /* FIXME: This could actually be set on one page docs or docs
2695                  * with a strange aspect ratio. */
2696                 /* requisition->height = 1;*/
2697         }
2698 }
2699
2700 static void
2701 ev_view_size_request_dual_page (EvView         *view,
2702                                 GtkRequisition *requisition)
2703 {
2704         GtkBorder border;
2705         gint width, height;
2706
2707         /* Find the largest of the two. */
2708         ev_view_get_page_size (view,
2709                                view->current_page,
2710                                &width, &height);
2711         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2712                 gint width_2, height_2;
2713                 ev_view_get_page_size (view,
2714                                        view->current_page + 1,
2715                                        &width_2, &height_2);
2716                 if (width_2 > width) {
2717                         width = width_2;
2718                         height = height_2;
2719                 }
2720         }
2721         compute_border (view, width, height, &border);
2722
2723         requisition->width = ((width + border.left + border.right) * 2) +
2724                 (view->spacing * 3);
2725         requisition->height = (height + border.top + border.bottom) +
2726                 (view->spacing * 2);
2727
2728         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2729                 requisition->width = 1;
2730         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2731                 requisition->width = 1;
2732                 requisition->height = 1;
2733         }
2734 }
2735
2736 static void
2737 ev_view_size_request_single_page (EvView         *view,
2738                                   GtkRequisition *requisition)
2739 {
2740         GtkBorder border;
2741         gint width, height;
2742
2743         ev_view_get_page_size (view, view->current_page, &width, &height);
2744         compute_border (view, width, height, &border);
2745
2746         requisition->width = width + border.left + border.right + (2 * view->spacing);
2747         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2748
2749         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
2750                 requisition->width = 1;
2751                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2752         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2753                 requisition->width = 1;
2754                 requisition->height = 1;
2755         }
2756 }
2757
2758 static void
2759 ev_view_size_request (GtkWidget      *widget,
2760                       GtkRequisition *requisition)
2761 {
2762         EvView *view = EV_VIEW (widget);
2763
2764         if (view->document == NULL) {
2765                 requisition->width = 1;
2766                 requisition->height = 1;
2767                 return;
2768         }
2769
2770         if (view->presentation) {
2771                 requisition->width = 1;
2772                 requisition->height = 1;
2773                 return;
2774         }
2775
2776         if (view->continuous && view->dual_page)
2777                 ev_view_size_request_continuous_dual_page (view, requisition);
2778         else if (view->continuous)
2779                 ev_view_size_request_continuous (view, requisition);
2780         else if (view->dual_page)
2781                 ev_view_size_request_dual_page (view, requisition);
2782         else
2783                 ev_view_size_request_single_page (view, requisition);
2784 }
2785
2786 static void
2787 ev_view_size_allocate (GtkWidget      *widget,
2788                        GtkAllocation  *allocation)
2789 {
2790         EvView *view = EV_VIEW (widget);
2791         GList  *children, *l;
2792         gint    root_x, root_y;
2793
2794         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2795
2796         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2797             view->sizing_mode == EV_SIZING_BEST_FIT) {
2798                 ev_view_zoom_for_size (view,
2799                                        allocation->width,
2800                                        allocation->height);
2801                 ev_view_size_request (widget, &widget->requisition);
2802         }
2803
2804         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2805         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2806
2807         if (view->document)
2808                 view_update_range_and_current_page (view);
2809
2810         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2811         view->pending_resize = FALSE;
2812         view->pending_point.x = 0;
2813         view->pending_point.y = 0;
2814
2815         children = gtk_container_get_children (GTK_CONTAINER (widget));
2816         for (l = children; l && l->data; l = g_list_next (l)) {
2817                 EvFormField   *field;
2818                 GdkRectangle   view_area;
2819                 GList         *form_field_mapping;
2820                 GtkAllocation  child_allocation;
2821                 GtkRequisition child_requisition;
2822                 GtkWidget     *child = (GtkWidget *)l->data;
2823
2824                 field = g_object_get_data (G_OBJECT (child), "form-field");
2825                 if (!field)
2826                         continue;
2827
2828                 form_field_mapping = ev_pixbuf_cache_get_form_field_mapping (view->pixbuf_cache,
2829                                                                              field->page->index);
2830                 ev_view_get_area_from_mapping (view, field->page->index,
2831                                                form_field_mapping,
2832                                                field, &view_area);
2833
2834                 gtk_widget_size_request (child, &child_requisition);
2835                 if (child_requisition.width != view_area.width ||
2836                     child_requisition.height != view_area.height)
2837                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2838
2839                 gtk_container_child_get (GTK_CONTAINER (widget),
2840                                          child,
2841                                          "x", &child_allocation.x,
2842                                          "y", &child_allocation.y,
2843                                          NULL);
2844                 if (child_allocation.x != view_area.x ||
2845                     child_allocation.y != view_area.y) {
2846                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2847                 }
2848         }
2849         g_list_free (children);
2850
2851         if (view->window_children)
2852                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2853                                        &root_x, &root_y);
2854
2855         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2856                 EvViewWindowChild *child;
2857                 EvRectangle        doc_rect;
2858                 GdkRectangle       view_rect;
2859
2860                 child = (EvViewWindowChild *)l->data;
2861
2862                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
2863                 if (child->moved) {
2864                         doc_rect.x1 = child->orig_x;
2865                         doc_rect.y1 = child->orig_y;
2866                 }
2867                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
2868                 view_rect.x -= view->scroll_x;
2869                 view_rect.y -= view->scroll_y;
2870
2871                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
2872                         child->parent_x = root_x;
2873                         child->parent_y = root_y;
2874                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
2875                 }
2876         }
2877 }
2878
2879 static void
2880 ev_view_realize (GtkWidget *widget)
2881 {
2882         EvView *view = EV_VIEW (widget);
2883
2884         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
2885                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
2886
2887         gdk_window_set_events (view->layout.bin_window,
2888                                (gdk_window_get_events (view->layout.bin_window) |
2889                                 GDK_EXPOSURE_MASK |
2890                                 GDK_BUTTON_PRESS_MASK |
2891                                 GDK_BUTTON_RELEASE_MASK |
2892                                 GDK_SCROLL_MASK |
2893                                 GDK_KEY_PRESS_MASK |
2894                                 GDK_POINTER_MOTION_MASK |
2895                                 GDK_POINTER_MOTION_HINT_MASK |
2896                                 GDK_ENTER_NOTIFY_MASK |
2897                                 GDK_LEAVE_NOTIFY_MASK));
2898
2899         if (view->presentation)
2900                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
2901         else
2902                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
2903
2904         on_adjustment_value_changed (NULL, view);
2905 }
2906
2907 static gboolean
2908 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
2909 {
2910         EvView *view = EV_VIEW (widget);
2911         guint state;
2912
2913         state = event->state & gtk_accelerator_get_default_mod_mask ();
2914
2915         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
2916                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
2917
2918                 if (event->direction == GDK_SCROLL_UP ||
2919                     event->direction == GDK_SCROLL_LEFT) {
2920                         if (ev_view_can_zoom_in (view)) {
2921                                 ev_view_zoom_in (view);
2922                         }
2923                 } else {
2924                         if (ev_view_can_zoom_out (view)) {
2925                                 ev_view_zoom_out (view);
2926                         }
2927                 }
2928
2929                 return TRUE;
2930         }
2931
2932         view->jump_to_find_result = FALSE;
2933
2934         /* Shift+Wheel scrolls the in the perpendicular direction */
2935         if (state & GDK_SHIFT_MASK) {
2936                 if (event->direction == GDK_SCROLL_UP)
2937                         event->direction = GDK_SCROLL_LEFT;
2938                 else if (event->direction == GDK_SCROLL_LEFT)
2939                         event->direction = GDK_SCROLL_UP;
2940                 else if (event->direction == GDK_SCROLL_DOWN)
2941                         event->direction = GDK_SCROLL_RIGHT;
2942                 else if (event->direction == GDK_SCROLL_RIGHT)
2943                         event->direction = GDK_SCROLL_DOWN;
2944
2945                 event->state &= ~GDK_SHIFT_MASK;
2946                 state &= ~GDK_SHIFT_MASK;
2947         }
2948
2949         if (state == 0 &&
2950             (view->presentation ||
2951              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
2952                 switch (event->direction) {
2953                         case GDK_SCROLL_DOWN:
2954                         case GDK_SCROLL_RIGHT:
2955                                 ev_view_next_page (view);
2956                                 break;
2957                         case GDK_SCROLL_UP:
2958                         case GDK_SCROLL_LEFT:
2959                                 ev_view_previous_page (view);
2960                                 break;
2961                 }
2962
2963                 return TRUE;
2964         }
2965
2966         return FALSE;
2967 }
2968
2969 static EvViewSelection *
2970 find_selection_for_page (EvView *view,
2971                          gint    page)
2972 {
2973         GList *list;
2974
2975         for (list = view->selection_info.selections; list != NULL; list = list->next) {
2976                 EvViewSelection *selection;
2977
2978                 selection = (EvViewSelection *) list->data;
2979
2980                 if (selection->page == page)
2981                         return selection;
2982         }
2983
2984         return NULL;
2985 }
2986
2987 static void
2988 draw_end_presentation_page (EvView       *view,
2989                             GdkRectangle *page_area)
2990 {
2991         PangoLayout *layout;
2992         PangoFontDescription *font_desc;
2993         gchar *markup;
2994         const gchar *text = _("End of presentation. Press Escape to exit.");
2995
2996         if (view->presentation_state != EV_PRESENTATION_END)
2997                 return;
2998
2999         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
3000         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3001         pango_layout_set_markup (layout, markup, -1);
3002         g_free (markup);
3003
3004         font_desc = pango_font_description_new ();
3005         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3006         pango_layout_set_font_description (layout, font_desc);
3007
3008         gtk_paint_layout (GTK_WIDGET (view)->style,
3009                           view->layout.bin_window,
3010                           GTK_WIDGET_STATE (view),
3011                           FALSE,
3012                           page_area,
3013                           GTK_WIDGET (view),
3014                           NULL,
3015                           page_area->x + 15,
3016                           page_area->y + 15,
3017                           layout);
3018
3019         pango_font_description_free (font_desc);
3020         g_object_unref (layout);
3021 }
3022
3023 static gboolean
3024 ev_view_expose_event (GtkWidget      *widget,
3025                       GdkEventExpose *event)
3026 {
3027         EvView  *view = EV_VIEW (widget);
3028         cairo_t *cr;
3029         gint     i;
3030
3031         if (view->animation) {
3032                 if (ev_transition_animation_ready (view->animation)) {
3033                         GdkRectangle page_area;
3034                         GtkBorder    border;
3035
3036                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3037                                 cr = gdk_cairo_create (view->layout.bin_window);
3038
3039                                 /* normalize to x=0, y=0 */
3040                                 cairo_translate (cr, page_area.x, page_area.y);
3041                                 page_area.x = page_area.y = 0;
3042
3043                                 ev_transition_animation_paint (view->animation, cr, page_area);
3044                                 cairo_destroy (cr);
3045                         }
3046                 }
3047
3048                 return TRUE;
3049         }
3050
3051         if (view->presentation) {
3052                 switch (view->presentation_state) {
3053                         case EV_PRESENTATION_END: {
3054                                 GdkRectangle area = {0};
3055
3056                                 area.width = widget->allocation.width;
3057                                 area.height = widget->allocation.height;
3058
3059                                 draw_end_presentation_page (view, &area);
3060                         }
3061                                 return FALSE;
3062                         case EV_PRESENTATION_BLACK:
3063                         case EV_PRESENTATION_WHITE:
3064                                 return FALSE;
3065                         case EV_PRESENTATION_NORMAL:
3066                         default:
3067                                 break;
3068                 }
3069         } else if (view->loading) {
3070                 GdkRectangle area = {0};
3071
3072                 area.width = widget->allocation.width;
3073                 area.height = widget->allocation.height;
3074
3075                 draw_loading_text (view,
3076                                    &area,
3077                                    &(event->area));
3078         }
3079
3080         if (view->document == NULL)
3081                 return FALSE;
3082
3083         cr = gdk_cairo_create (view->layout.bin_window);
3084
3085         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3086                 GdkRectangle page_area;
3087                 GtkBorder border;
3088                 gboolean page_ready = TRUE;
3089
3090                 if (!get_page_extents (view, i, &page_area, &border))
3091                         continue;
3092
3093                 page_area.x -= view->scroll_x;
3094                 page_area.y -= view->scroll_y;
3095
3096                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3097
3098                 if (page_ready && view->find_pages && view->highlight_find_results)
3099                         highlight_find_results (view, i);
3100                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3101                         show_annotation_windows (view, i);
3102         }
3103
3104         cairo_destroy (cr);
3105
3106         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3107                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3108
3109         return FALSE;
3110 }
3111
3112 static gboolean
3113 ev_view_do_popup_menu (EvView *view,
3114                        gdouble x,
3115                        gdouble y)
3116 {
3117         EvLink  *link;
3118         EvImage *image;
3119
3120         image = ev_view_get_image_at_location (view, x, y);
3121         if (image) {
3122                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3123                 return TRUE;
3124         }
3125
3126         link = ev_view_get_link_at_location (view, x, y);
3127         if (link) {
3128                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3129                 return TRUE;
3130         }
3131
3132         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3133
3134         return TRUE;
3135 }
3136
3137 static gboolean
3138 ev_view_popup_menu (GtkWidget *widget)
3139 {
3140         gint x, y;
3141
3142         gtk_widget_get_pointer (widget, &x, &y);
3143         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3144 }
3145
3146 static void
3147 get_link_area (EvView       *view,
3148                gint          x,
3149                gint          y,
3150                EvLink       *link,
3151                GdkRectangle *area)
3152 {
3153         GList *link_mapping;
3154         gint   page;
3155         gint   x_offset = 0, y_offset = 0;
3156
3157         x += view->scroll_x;
3158         y += view->scroll_y;
3159
3160         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3161
3162         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
3163         ev_view_get_area_from_mapping (view, page,
3164                                        link_mapping,
3165                                        link, area);
3166 }
3167
3168 static void
3169 get_annot_area (EvView       *view,
3170                gint          x,
3171                gint          y,
3172                EvAnnotation *annot,
3173                GdkRectangle *area)
3174 {
3175         GList *annots_mapping;
3176         gint   page;
3177         gint   x_offset = 0, y_offset = 0;
3178
3179         x += view->scroll_x;
3180         y += view->scroll_y;
3181
3182         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3183
3184         annots_mapping = ev_pixbuf_cache_get_annots_mapping (view->pixbuf_cache, page);
3185         ev_view_get_area_from_mapping (view, page,
3186                                        annots_mapping,
3187                                        annot, area);
3188 }
3189
3190 static gboolean
3191 ev_view_query_tooltip (GtkWidget  *widget,
3192                        gint        x,
3193                        gint        y,
3194                        gboolean    keyboard_tip,
3195                        GtkTooltip *tooltip)
3196 {
3197         EvView       *view = EV_VIEW (widget);
3198         EvLink       *link;
3199         EvAnnotation *annot;
3200         gchar        *text;
3201
3202         annot = ev_view_get_annotation_at_location (view, x, y);
3203         if (annot && annot->contents) {
3204                 GdkRectangle annot_area;
3205
3206                 get_annot_area (view, x, y, annot, &annot_area);
3207                 gtk_tooltip_set_text (tooltip, annot->contents);
3208                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3209
3210                 return TRUE;
3211         }
3212
3213         link = ev_view_get_link_at_location (view, x, y);
3214         if (!link)
3215                 return FALSE;
3216
3217         text = tip_from_link (view, link);
3218         if (text && g_utf8_validate (text, -1, NULL)) {
3219                 GdkRectangle link_area;
3220
3221                 get_link_area (view, x, y, link, &link_area);
3222                 gtk_tooltip_set_text (tooltip, text);
3223                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3224         }
3225         g_free (text);
3226
3227         return TRUE;
3228 }
3229
3230 static void
3231 start_selection_for_event (EvView         *view,
3232                            GdkEventButton *event)
3233 {
3234         clear_selection (view);
3235
3236         view->selection_info.start.x = event->x + view->scroll_x;
3237         view->selection_info.start.y = event->y + view->scroll_y;
3238
3239         switch (event->type) {
3240                 case GDK_2BUTTON_PRESS:
3241                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3242                         break;
3243                 case GDK_3BUTTON_PRESS:
3244                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3245                         break;
3246                 default:
3247                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3248                         return;
3249         }
3250
3251         /* In case of WORD or LINE, compute selections now */
3252         compute_selections (view,
3253                             view->selection_info.style,
3254                             &(view->selection_info.start),
3255                             &(view->selection_info.start));
3256 }
3257
3258 static gboolean
3259 ev_view_button_press_event (GtkWidget      *widget,
3260                             GdkEventButton *event)
3261 {
3262         EvView *view = EV_VIEW (widget);
3263
3264         if (!view->document)
3265                 return FALSE;
3266
3267         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3268                 gtk_widget_grab_focus (widget);
3269         }
3270
3271         if (view->window_child_focus) {
3272                 EvAnnotationWindow *window;
3273                 EvAnnotation       *annot;
3274
3275                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3276                 annot = ev_annotation_window_get_annotation (window);
3277                 ev_annotation_window_ungrab_focus (window);
3278                 ev_view_annotation_save (view, annot);
3279                 view->window_child_focus = NULL;
3280         }
3281
3282         view->pressed_button = event->button;
3283         view->selection_info.in_drag = FALSE;
3284
3285         if (view->scroll_info.autoscrolling)
3286                 return TRUE;
3287
3288         switch (event->button) {
3289                 case 1: {
3290                         EvImage *image;
3291                         EvAnnotation *annot;
3292                         EvFormField *field;
3293
3294                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3295                                 if (event->type == GDK_3BUTTON_PRESS) {
3296                                         start_selection_for_event (view, event);
3297                                 } else if (location_in_selected_text (view,
3298                                                                event->x + view->scroll_x,
3299                                                                event->y + view->scroll_y)) {
3300                                         view->selection_info.in_drag = TRUE;
3301                                 } else {
3302                                         start_selection_for_event (view, event);
3303                                 }
3304
3305                                 gtk_widget_queue_draw (widget);
3306                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3307                                 ev_view_handle_annotation (view, annot, event->x, event->y);
3308                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3309                                 ev_view_remove_all (view);
3310                                 ev_view_handle_form_field (view, field, event->x, event->y);
3311                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3312                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3313                                 if (view->image_dnd_info.image)
3314                                         g_object_unref (view->image_dnd_info.image);
3315                                 view->image_dnd_info.image = g_object_ref (image);
3316                                 view->image_dnd_info.in_drag = TRUE;
3317
3318                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3319                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3320                         } else {
3321                                 ev_view_remove_all (view);
3322
3323                                 if (EV_IS_SELECTION (view->document))
3324                                         start_selection_for_event (view, event);
3325                         }
3326                 }
3327                         return TRUE;
3328                 case 2:
3329                         /* use root coordinates as reference point because
3330                          * scrolling changes window relative coordinates */
3331                         view->drag_info.start.x = event->x_root;
3332                         view->drag_info.start.y = event->y_root;
3333                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3334                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3335
3336                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3337
3338                         return TRUE;
3339                 case 3:
3340                         view->scroll_info.start_y = event->y;
3341                         return ev_view_do_popup_menu (view, event->x, event->y);
3342         }
3343
3344         return FALSE;
3345 }
3346
3347 static void
3348 ev_view_remove_all (EvView *view)
3349 {
3350         GList *children, *child;
3351
3352         children = gtk_container_get_children (GTK_CONTAINER (view));
3353         for (child = children; child && child->data; child = g_list_next (child)) {
3354                 gtk_container_remove (GTK_CONTAINER (view),
3355                                       GTK_WIDGET (child->data));
3356         }
3357         g_list_free (children);
3358 }
3359
3360 /*** Drag and Drop ***/
3361 static void
3362 ev_view_drag_data_get (GtkWidget        *widget,
3363                        GdkDragContext   *context,
3364                        GtkSelectionData *selection_data,
3365                        guint             info,
3366                        guint             time)
3367 {
3368         EvView *view = EV_VIEW (widget);
3369
3370         switch (info) {
3371                 case TARGET_DND_TEXT:
3372                         if (EV_IS_SELECTION (view->document) &&
3373                             view->selection_info.selections) {
3374                                 gchar *text;
3375
3376                                 text = get_selected_text (view);
3377                                 gtk_selection_data_set_text (selection_data,
3378                                                              text,
3379                                                              strlen (text));
3380                                 g_free (text);
3381                         }
3382                         break;
3383                 case TARGET_DND_IMAGE:
3384                         if (view->image_dnd_info.image) {
3385                                 GdkPixbuf *pixbuf;
3386
3387                                 ev_document_doc_mutex_lock ();
3388                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3389                                                                        view->image_dnd_info.image);
3390                                 ev_document_doc_mutex_unlock ();
3391
3392                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3393                                 g_object_unref (pixbuf);
3394                         }
3395                         break;
3396                 case TARGET_DND_URI:
3397                         if (view->image_dnd_info.image) {
3398                                 GdkPixbuf   *pixbuf;
3399                                 const gchar *tmp_uri;
3400                                 gchar       *uris[2];
3401
3402                                 ev_document_doc_mutex_lock ();
3403                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3404                                                                        view->image_dnd_info.image);
3405                                 ev_document_doc_mutex_unlock ();
3406
3407                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3408                                 g_object_unref (pixbuf);
3409
3410                                 uris[0] = (gchar *)tmp_uri;
3411                                 uris[1] = NULL;
3412                                 gtk_selection_data_set_uris (selection_data, uris);
3413                         }
3414         }
3415 }
3416
3417 static gboolean
3418 ev_view_drag_motion (GtkWidget      *widget,
3419                      GdkDragContext *context,
3420                      gint            x,
3421                      gint            y,
3422                      guint           time)
3423 {
3424         if (gtk_drag_get_source_widget (context) == widget)
3425                 gdk_drag_status (context, 0, time);
3426         else
3427                 gdk_drag_status (context, context->suggested_action, time);
3428
3429         return TRUE;
3430 }
3431
3432 static gboolean
3433 selection_update_idle_cb (EvView *view)
3434 {
3435         compute_selections (view,
3436                             view->selection_info.style,
3437                             &view->selection_info.start,
3438                             &view->motion);
3439         view->selection_update_id = 0;
3440         return FALSE;
3441 }
3442
3443 static gboolean
3444 selection_scroll_timeout_cb (EvView *view)
3445 {
3446         gint x, y, shift = 0;
3447         GtkWidget *widget = GTK_WIDGET (view);
3448
3449         gtk_widget_get_pointer (widget, &x, &y);
3450
3451         if (y > widget->allocation.height) {
3452                 shift = (y - widget->allocation.height) / 2;
3453         } else if (y < 0) {
3454                 shift = y / 2;
3455         }
3456
3457         if (shift)
3458                 gtk_adjustment_set_value (view->vadjustment,
3459                                           CLAMP (view->vadjustment->value + shift,
3460                                           view->vadjustment->lower,
3461                                           view->vadjustment->upper -
3462                                           view->vadjustment->page_size));
3463
3464         if (x > widget->allocation.width) {
3465                 shift = (x - widget->allocation.width) / 2;
3466         } else if (x < 0) {
3467                 shift = x / 2;
3468         }
3469
3470         if (shift)
3471                 gtk_adjustment_set_value (view->hadjustment,
3472                                           CLAMP (view->hadjustment->value + shift,
3473                                           view->hadjustment->lower,
3474                                           view->hadjustment->upper -
3475                                           view->hadjustment->page_size));
3476
3477         return TRUE;
3478 }
3479
3480 static gboolean
3481 ev_view_drag_update_momentum (EvView *view)
3482 {
3483         int i;
3484         if (!view->drag_info.in_drag)
3485                 return FALSE;
3486
3487         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3488                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3489                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3490         }
3491
3492         /* Momentum is a moving average of 10ms granularity over
3493          * the last 100ms with each 10ms stored in buffer.
3494          */
3495
3496         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3497         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3498
3499         return TRUE;
3500 }
3501
3502 static gboolean
3503 ev_view_scroll_drag_release (EvView *view)
3504 {
3505         gdouble dhadj_value, dvadj_value;
3506         gdouble oldhadjustment, oldvadjustment;
3507
3508         view->drag_info.momentum.x /= 1.2;
3509         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3510
3511         dhadj_value = view->hadjustment->page_size *
3512                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3513         dvadj_value = view->vadjustment->page_size *
3514                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3515
3516         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3517         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3518
3519      /* When we reach the edges, we need either to absorb some momentum and bounce by
3520       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3521      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3522            ((oldhadjustment + dhadj_value) < 0))
3523                 view->drag_info.momentum.x = 0;
3524         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3525            ((oldvadjustment + dvadj_value) < 0))
3526                 view->drag_info.momentum.y = 0;
3527
3528         gtk_adjustment_set_value (view->hadjustment,
3529                                 MIN (oldhadjustment + dhadj_value,
3530                                 view->hadjustment->upper - view->hadjustment->page_size));
3531         gtk_adjustment_set_value (view->vadjustment,
3532                                 MIN (oldvadjustment + dvadj_value,
3533                                 view->vadjustment->upper - view->vadjustment->page_size));
3534
3535         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3536            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3537                 return FALSE;
3538         else
3539                 return TRUE;
3540 }
3541
3542 static gboolean
3543 ev_view_motion_notify_event (GtkWidget      *widget,
3544                              GdkEventMotion *event)
3545 {
3546         EvView *view = EV_VIEW (widget);
3547         gint x, y;
3548
3549         if (!view->document)
3550                 return FALSE;
3551
3552
3553         if (event->is_hint || event->window != view->layout.bin_window) {
3554             gtk_widget_get_pointer (widget, &x, &y);
3555         } else {
3556             x = event->x;
3557             y = event->y;
3558         }
3559
3560         if (view->scroll_info.autoscrolling) {
3561                 view->scroll_info.last_y = y;
3562                 return TRUE;
3563         }
3564
3565         if (view->selection_info.in_drag) {
3566                 if (gtk_drag_check_threshold (widget,
3567                                               view->selection_info.start.x,
3568                                               view->selection_info.start.y,
3569                                               x, y)) {
3570                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3571
3572                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3573
3574                         gtk_drag_begin (widget, target_list,
3575                                         GDK_ACTION_COPY,
3576                                         1, (GdkEvent *)event);
3577
3578                         view->selection_info.in_drag = FALSE;
3579
3580                         gtk_target_list_unref (target_list);
3581
3582                         return TRUE;
3583                 }
3584         } else if (view->image_dnd_info.in_drag) {
3585                 if (gtk_drag_check_threshold (widget,
3586                                               view->selection_info.start.x,
3587                                               view->selection_info.start.y,
3588                                               x, y)) {
3589                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3590
3591                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3592                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3593
3594                         gtk_drag_begin (widget, target_list,
3595                                         GDK_ACTION_COPY,
3596                                         1, (GdkEvent *)event);
3597
3598                         view->image_dnd_info.in_drag = FALSE;
3599
3600                         gtk_target_list_unref (target_list);
3601
3602                         return TRUE;
3603                 }
3604         }
3605
3606         switch (view->pressed_button) {
3607         case 1:
3608                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3609                  * documents only.
3610                  */
3611                 if (view->rotation != 0)
3612                         return FALSE;
3613
3614                 /* Schedule timeout to scroll during selection and additionally
3615                  * scroll once to allow arbitrary speed. */
3616                 if (!view->selection_scroll_id)
3617                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3618                                                                (GSourceFunc)selection_scroll_timeout_cb,
3619                                                                view);
3620                 else
3621                     selection_scroll_timeout_cb (view);
3622
3623                 view->selection_info.in_selection = TRUE;
3624                 view->motion.x = x + view->scroll_x;
3625                 view->motion.y = y + view->scroll_y;
3626
3627                 /* Queue an idle to handle the motion.  We do this because
3628                  * handling any selection events in the motion could be slower
3629                  * than new motion events reach us.  We always put it in the
3630                  * idle to make sure we catch up and don't visibly lag the
3631                  * mouse. */
3632                 if (!view->selection_update_id)
3633                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3634
3635                 return TRUE;
3636         case 2:
3637                 if (!view->drag_info.in_drag) {
3638                         gboolean start;
3639                         int i;
3640
3641                         start = gtk_drag_check_threshold (widget,
3642                                                           view->drag_info.start.x,
3643                                                           view->drag_info.start.y,
3644                                                           event->x_root,
3645                                                           event->y_root);
3646                         view->drag_info.in_drag = start;
3647                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3648                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3649                         /* Set 100 to choose how long it takes to build up momentum */
3650                         /* Clear out previous momentum info: */
3651                         for (i = 0; i < DRAG_HISTORY; i++) {
3652                                 view->drag_info.buffer[i].x = event->x;
3653                                 view->drag_info.buffer[i].y = event->y;
3654                         }
3655                         view->drag_info.momentum.x = 0;
3656                         view->drag_info.momentum.y = 0;
3657                 }
3658
3659                 if (view->drag_info.in_drag) {
3660                         int dx, dy;
3661                         gdouble dhadj_value, dvadj_value;
3662
3663                         view->drag_info.buffer[0].x = event->x;
3664                         view->drag_info.buffer[0].y = event->y;
3665
3666                         dx = event->x_root - view->drag_info.start.x;
3667                         dy = event->y_root - view->drag_info.start.y;
3668
3669                         dhadj_value = view->hadjustment->page_size *
3670                                       (gdouble)dx / widget->allocation.width;
3671                         dvadj_value = view->vadjustment->page_size *
3672                                       (gdouble)dy / widget->allocation.height;
3673
3674                         /* clamp scrolling to visible area */
3675                         gtk_adjustment_set_value (view->hadjustment,
3676                                                   MIN(view->drag_info.hadj - dhadj_value,
3677                                                       view->hadjustment->upper -
3678                                                       view->hadjustment->page_size));
3679                         gtk_adjustment_set_value (view->vadjustment,
3680                                                   MIN(view->drag_info.vadj - dvadj_value,
3681                                                       view->vadjustment->upper -
3682                                                       view->vadjustment->page_size));
3683
3684                         return TRUE;
3685                 }
3686
3687                 break;
3688         default:
3689                 ev_view_handle_cursor_over_xy (view, x, y);
3690         }
3691
3692         return FALSE;
3693 }
3694
3695 static gboolean
3696 ev_view_button_release_event (GtkWidget      *widget,
3697                               GdkEventButton *event)
3698 {
3699         EvView *view = EV_VIEW (widget);
3700         EvLink *link = NULL;
3701
3702         view->image_dnd_info.in_drag = FALSE;
3703
3704         if (view->scroll_info.autoscrolling) {
3705                 ev_view_autoscroll_stop (view);
3706                 view->pressed_button = -1;
3707
3708                 return TRUE;
3709         }
3710
3711         if (view->drag_info.in_drag) {
3712                 view->drag_info.release_timeout_id =
3713                         g_timeout_add (20,
3714                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3715         }
3716
3717         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3718                 link = ev_view_get_link_at_location (view, event->x, event->y);
3719         }
3720
3721         view->drag_info.in_drag = FALSE;
3722
3723         if (view->pressed_button == 2) {
3724                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3725         }
3726
3727         view->pressed_button = -1;
3728
3729         if (view->selection_scroll_id) {
3730             g_source_remove (view->selection_scroll_id);
3731             view->selection_scroll_id = 0;
3732         }
3733         if (view->selection_update_id) {
3734             g_source_remove (view->selection_update_id);
3735             view->selection_update_id = 0;
3736         }
3737
3738         if (view->selection_info.selections) {
3739                 clear_link_selected (view);
3740                 ev_view_update_primary_selection (view);
3741
3742                 if (view->selection_info.in_drag) {
3743                         clear_selection (view);
3744                         gtk_widget_queue_draw (widget);
3745                 }
3746
3747                 view->selection_info.in_drag = FALSE;
3748         } else if (link) {
3749                 if (event->button == 2) {
3750                         EvLinkAction    *action;
3751                         EvLinkActionType type;
3752
3753                         action = ev_link_get_action (link);
3754                         if (!action)
3755                                 return FALSE;
3756
3757                         type = ev_link_action_get_action_type (action);
3758                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3759                                 g_signal_emit (view,
3760                                                signals[SIGNAL_EXTERNAL_LINK],
3761                                                0, action);
3762                         }
3763                 } else {
3764                         ev_view_handle_link (view, link);
3765                 }
3766         } else if (view->presentation) {
3767                 switch (event->button) {
3768                         case 1:
3769                                 ev_view_next_page (view);
3770                                 return TRUE;
3771                         case 3:
3772                                 ev_view_previous_page (view);
3773                                 return TRUE;
3774                 }
3775         }
3776
3777         return FALSE;
3778 }
3779
3780 /* Goto Window */
3781 /* Cut and paste from gtkwindow.c */
3782 static void
3783 send_focus_change (GtkWidget *widget,
3784                    gboolean   in)
3785 {
3786         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3787
3788         g_object_ref (widget);
3789
3790         if (in)
3791                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3792         else
3793                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3794
3795         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3796         fevent->focus_change.window = g_object_ref (widget->window);
3797         fevent->focus_change.in = in;
3798
3799         gtk_widget_event (widget, fevent);
3800
3801         g_object_notify (G_OBJECT (widget), "has-focus");
3802
3803         g_object_unref (widget);
3804         gdk_event_free (fevent);
3805 }
3806
3807 static void
3808 ev_view_goto_window_hide (EvView *view)
3809 {
3810         /* send focus-in event */
3811         send_focus_change (view->goto_entry, FALSE);
3812         gtk_widget_hide (view->goto_window);
3813         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3814 }
3815
3816 static gboolean
3817 ev_view_goto_window_delete_event (GtkWidget   *widget,
3818                                   GdkEventAny *event,
3819                                   EvView      *view)
3820 {
3821         ev_view_goto_window_hide (view);
3822
3823         return TRUE;
3824 }
3825
3826 static gboolean
3827 key_is_numeric (guint keyval)
3828 {
3829         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
3830                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
3831 }
3832
3833 static gboolean
3834 ev_view_goto_window_key_press_event (GtkWidget   *widget,
3835                                      GdkEventKey *event,
3836                                      EvView      *view)
3837 {
3838         switch (event->keyval) {
3839                 case GDK_Escape:
3840                 case GDK_Tab:
3841                 case GDK_KP_Tab:
3842                 case GDK_ISO_Left_Tab:
3843                         ev_view_goto_window_hide (view);
3844                         return TRUE;
3845                 case GDK_Return:
3846                 case GDK_KP_Enter:
3847                 case GDK_ISO_Enter:
3848                 case GDK_BackSpace:
3849                 case GDK_Delete:
3850                         return FALSE;
3851                 default:
3852                         if (!key_is_numeric (event->keyval))
3853                                 return TRUE;
3854         }
3855
3856         return FALSE;
3857 }
3858
3859 static gboolean
3860 ev_view_goto_window_button_press_event (GtkWidget      *widget,
3861                                         GdkEventButton *event,
3862                                         EvView         *view)
3863 {
3864         ev_view_goto_window_hide (view);
3865
3866         return TRUE;
3867 }
3868
3869 static void
3870 ev_view_goto_entry_activate (GtkEntry *entry,
3871                              EvView   *view)
3872 {
3873         const gchar *text;
3874         gint         page;
3875
3876         text = gtk_entry_get_text (entry);
3877         page = atoi (text) - 1;
3878
3879         ev_view_goto_window_hide (view);
3880
3881         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
3882                 ev_document_model_set_page (view->model, page);
3883         }
3884 }
3885
3886 static void
3887 ev_view_goto_window_create (EvView *view)
3888 {
3889         GtkWidget *frame, *hbox, *toplevel, *label;
3890
3891         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
3892
3893         if (view->goto_window) {
3894                 if (GTK_WINDOW (toplevel)->group)
3895                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3896                                                      GTK_WINDOW (view->goto_window));
3897                 else if (GTK_WINDOW (view->goto_window)->group)
3898                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
3899                                                         GTK_WINDOW (view->goto_window));
3900                 return;
3901         }
3902
3903         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
3904         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
3905                                gtk_widget_get_screen (GTK_WIDGET (view)));
3906
3907         if (GTK_WINDOW (toplevel)->group)
3908                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
3909                                              GTK_WINDOW (view->goto_window));
3910
3911         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
3912
3913         g_signal_connect (view->goto_window, "delete_event",
3914                           G_CALLBACK (ev_view_goto_window_delete_event),
3915                           view);
3916         g_signal_connect (view->goto_window, "key_press_event",
3917                           G_CALLBACK (ev_view_goto_window_key_press_event),
3918                           view);
3919         g_signal_connect (view->goto_window, "button_press_event",
3920                           G_CALLBACK (ev_view_goto_window_button_press_event),
3921                           view);
3922
3923         frame = gtk_frame_new (NULL);
3924         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
3925         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
3926         gtk_widget_show (frame);
3927
3928         hbox = gtk_hbox_new (FALSE, 0);
3929         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
3930         gtk_container_add (GTK_CONTAINER (frame), hbox);
3931         gtk_widget_show (hbox);
3932
3933         label = gtk_label_new(_("Jump to page:"));
3934         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
3935         gtk_widget_show (label);
3936         gtk_widget_realize (label);
3937
3938         view->goto_entry = gtk_entry_new ();
3939         g_signal_connect (view->goto_entry, "activate",
3940                           G_CALLBACK (ev_view_goto_entry_activate),
3941                           view);
3942         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
3943         gtk_widget_show (view->goto_entry);
3944         gtk_widget_realize (view->goto_entry);
3945 }
3946
3947 static void
3948 ev_view_goto_entry_grab_focus (EvView *view)
3949 {
3950         GtkWidgetClass *entry_parent_class;
3951
3952         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
3953         (entry_parent_class->grab_focus) (view->goto_entry);
3954
3955         send_focus_change (view->goto_entry, TRUE);
3956 }
3957
3958 static void
3959 ev_view_goto_window_send_key_event (EvView   *view,
3960                                     GdkEvent *event)
3961 {
3962         GdkEventKey *new_event;
3963         GdkScreen   *screen;
3964
3965         /* Move goto window off screen */
3966         screen = gtk_widget_get_screen (GTK_WIDGET (view));
3967         gtk_window_move (GTK_WINDOW (view->goto_window),
3968                          gdk_screen_get_width (screen) + 1,
3969                          gdk_screen_get_height (screen) + 1);
3970         gtk_widget_show (view->goto_window);
3971
3972         new_event = (GdkEventKey *) gdk_event_copy (event);
3973         g_object_unref (new_event->window);
3974         new_event->window = g_object_ref (view->goto_window->window);
3975         gtk_widget_realize (view->goto_window);
3976
3977         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
3978         gdk_event_free ((GdkEvent *)new_event);
3979         gtk_widget_hide (view->goto_window);
3980 }
3981
3982 static gboolean
3983 ev_view_key_press_event (GtkWidget   *widget,
3984                          GdkEventKey *event)
3985 {
3986         EvView *view = EV_VIEW (widget);
3987         EvPresentationState current;
3988
3989         if (!view->document)
3990                 return FALSE;
3991
3992         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3993                 /* Forward key events to current focused window child */
3994                 if (view->window_child_focus) {
3995                         GdkEventKey *new_event;
3996                         gboolean     handled;
3997
3998                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
3999                         g_object_unref (new_event->window);
4000                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4001                         gtk_widget_realize (view->window_child_focus->window);
4002                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4003                         gdk_event_free ((GdkEvent *)new_event);
4004
4005                         return handled;
4006                 }
4007
4008                 return FALSE;
4009         }
4010
4011         if (!view->presentation ||
4012             view->presentation_state == EV_PRESENTATION_END)
4013                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4014
4015
4016         current = view->presentation_state;
4017
4018         switch (event->keyval) {
4019                 case GDK_b:
4020                 case GDK_B:
4021                 case GDK_period:
4022                 case GDK_KP_Decimal:
4023                         view->presentation_state =
4024                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4025                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4026                         break;
4027                 case GDK_w:
4028                 case GDK_W:
4029                         view->presentation_state =
4030                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4031                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4032                         break;
4033                 default:
4034                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4035                             view->presentation_state == EV_PRESENTATION_WHITE) {
4036                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4037                         }
4038         }
4039
4040         if (current == view->presentation_state) {
4041                 if (ev_document_get_n_pages (view->document) > 1 &&
4042                     key_is_numeric (event->keyval)) {
4043                         gint x, y;
4044
4045                         ev_view_goto_window_create (view);
4046                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4047                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4048                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4049                         gtk_widget_show (view->goto_window);
4050                         ev_view_goto_entry_grab_focus (view);
4051
4052                         return TRUE;
4053                 }
4054
4055                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4056         }
4057
4058         switch (view->presentation_state) {
4059                 case EV_PRESENTATION_NORMAL:
4060                 case EV_PRESENTATION_BLACK:
4061                         gdk_window_set_background (view->layout.bin_window,
4062                                                    &widget->style->black);
4063                         break;
4064                 case EV_PRESENTATION_WHITE:
4065                         gdk_window_set_background (view->layout.bin_window,
4066                                                    &widget->style->white);
4067                         break;
4068                 default:
4069                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4070         }
4071
4072         gtk_widget_queue_draw (widget);
4073         return TRUE;
4074 }
4075
4076 static gint
4077 ev_view_focus_in (GtkWidget     *widget,
4078                   GdkEventFocus *event)
4079 {
4080         if (EV_VIEW (widget)->pixbuf_cache)
4081                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4082         gtk_widget_queue_draw (widget);
4083
4084         return FALSE;
4085 }
4086
4087 static gint
4088 ev_view_focus_out (GtkWidget     *widget,
4089                      GdkEventFocus *event)
4090 {
4091         if (EV_VIEW (widget)->goto_window)
4092                 ev_view_goto_window_hide (EV_VIEW (widget));
4093
4094         if (EV_VIEW (widget)->pixbuf_cache)
4095                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4096         gtk_widget_queue_draw (widget);
4097
4098         return FALSE;
4099 }
4100
4101 static gboolean
4102 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4103 {
4104         EvView *view = EV_VIEW (widget);
4105
4106         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4107                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4108
4109         return FALSE;
4110 }
4111
4112 static gboolean
4113 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4114 {
4115         EvView *view = EV_VIEW (widget);
4116
4117         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4118
4119         return FALSE;
4120 }
4121
4122 static void
4123 ev_view_style_set (GtkWidget *widget,
4124                    GtkStyle  *old_style)
4125 {
4126         if (EV_VIEW (widget)->pixbuf_cache)
4127                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4128
4129         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4130 }
4131
4132 /*** Drawing ***/
4133
4134 static guint32
4135 ev_gdk_color_to_rgb (const GdkColor *color)
4136 {
4137   guint32 result;
4138   result = (0xff0000 | (color->red & 0xff00));
4139   result <<= 8;
4140   result |= ((color->green & 0xff00) | (color->blue >> 8));
4141   return result;
4142 }
4143
4144 static void
4145 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4146                  const GdkRectangle *rect, guchar alpha)
4147 {
4148         GdkGC *gc;
4149         GdkPixbuf *pixbuf;
4150         GdkColor *fill_color_gdk;
4151         guint fill_color;
4152
4153         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4154         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4155
4156         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4157                                  rect->width, rect->height);
4158         gdk_pixbuf_fill (pixbuf, fill_color);
4159
4160         gdk_draw_pixbuf (window, NULL, pixbuf,
4161                          0, 0,
4162                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4163                          rect->width, rect->height,
4164                          GDK_RGB_DITHER_NONE,
4165                          0, 0);
4166
4167         g_object_unref (pixbuf);
4168
4169         gc = gdk_gc_new (window);
4170         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4171         gdk_draw_rectangle (window, gc, FALSE,
4172                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4173                             rect->width - 1,
4174                             rect->height - 1);
4175         g_object_unref (gc);
4176
4177         gdk_color_free (fill_color_gdk);
4178 }
4179
4180
4181 static void
4182 highlight_find_results (EvView *view, int page)
4183 {
4184         gint i, n_results = 0;
4185
4186         n_results = ev_view_find_get_n_results (view, page);
4187
4188         for (i = 0; i < n_results; i++) {
4189                 EvRectangle *rectangle;
4190                 GdkRectangle view_rectangle;
4191                 guchar alpha;
4192
4193                 if (i == view->find_result && page == view->current_page) {
4194                         alpha = 0x90;
4195                 } else {
4196                         alpha = 0x20;
4197                 }
4198
4199                 rectangle = ev_view_find_get_result (view, page, i);
4200                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4201                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4202                                  &view_rectangle, alpha);
4203         }
4204 }
4205
4206 static void
4207 draw_loading_text (EvView       *view,
4208                    GdkRectangle *page_area,
4209                    GdkRectangle *expose_area)
4210 {
4211         cairo_t *cr;
4212         gint     width, height;
4213
4214         if (!view->loading_text) {
4215                 const gchar *loading_text = _("Loading...");
4216                 PangoLayout *layout;
4217                 PangoFontDescription *font_desc;
4218                 PangoRectangle logical_rect;
4219                 gint target_width;
4220                 gdouble real_scale;
4221
4222                 ev_document_fc_mutex_lock ();
4223
4224                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4225
4226                 font_desc = pango_font_description_new ();
4227
4228                 /* We set the font to be 10 points, get the size, and scale appropriately */
4229                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4230                 pango_layout_set_font_description (layout, font_desc);
4231                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4232
4233                 target_width = MAX (page_area->width / 2, 1);
4234                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4235                 pango_font_description_set_size (font_desc, (int)real_scale);
4236                 pango_layout_set_font_description (layout, font_desc);
4237                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4238
4239                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4240                                                                  logical_rect.width,
4241                                                                  logical_rect.height);
4242                 cr = cairo_create (view->loading_text);
4243                 cairo_set_source_rgb (cr,
4244                                       155 / (double)255,
4245                                       155 / (double)255,
4246                                       155 / (double)255);
4247                 pango_cairo_show_layout (cr, layout);
4248                 cairo_destroy (cr);
4249
4250                 pango_font_description_free (font_desc);
4251                 g_object_unref (layout);
4252
4253                 ev_document_fc_mutex_unlock ();
4254         }
4255
4256         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4257         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4258
4259         cr = gdk_cairo_create (view->layout.bin_window);
4260         cairo_translate (cr,
4261                          page_area->x + width,
4262                          page_area->y + height);
4263         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4264         cairo_paint (cr);
4265         cairo_destroy (cr);
4266 }
4267
4268 static void
4269 draw_one_page (EvView       *view,
4270                gint          page,
4271                cairo_t      *cr,
4272                GdkRectangle *page_area,
4273                GtkBorder    *border,
4274                GdkRectangle *expose_area,
4275                gboolean     *page_ready)
4276 {
4277         GdkRectangle overlap;
4278         GdkRectangle real_page_area;
4279
4280         g_assert (view->document);
4281
4282         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4283                 return;
4284
4285         /* Render the document itself */
4286         real_page_area = *page_area;
4287
4288         real_page_area.x += border->left;
4289         real_page_area.y += border->top;
4290         real_page_area.width -= (border->left + border->right);
4291         real_page_area.height -= (border->top + border->bottom);
4292         *page_ready = TRUE;
4293
4294         if (!view->presentation) {
4295                 gint current_page;
4296
4297                 current_page = ev_document_model_get_page (view->model);
4298                 ev_document_misc_paint_one_page (view->layout.bin_window,
4299                                                  GTK_WIDGET (view),
4300                                                  page_area, border,
4301                                                  page == current_page);
4302         }
4303
4304         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4305                 gint             width, height;
4306                 gint             page_width, page_height;
4307                 cairo_surface_t *page_surface = NULL;
4308                 gint             selection_width, selection_height;
4309                 cairo_surface_t *selection_surface = NULL;
4310
4311                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4312
4313                 if (!page_surface) {
4314                         if (!view->presentation) {
4315                                 draw_loading_text (view,
4316                                                    &real_page_area,
4317                                                    expose_area);
4318                         }
4319
4320                         *page_ready = FALSE;
4321
4322                         return;
4323                 }
4324
4325                 ev_view_get_page_size (view, page, &width, &height);
4326
4327                 page_width = cairo_image_surface_get_width (page_surface);
4328                 page_height = cairo_image_surface_get_height (page_surface);
4329
4330                 cairo_save (cr);
4331                 cairo_translate (cr, overlap.x, overlap.y);
4332
4333                 if (width != page_width || height != page_height) {
4334                         cairo_pattern_set_filter (cairo_get_source (cr),
4335                                                   CAIRO_FILTER_FAST);
4336                         cairo_scale (cr,
4337                                      (gdouble)width / page_width,
4338                                      (gdouble)height / page_height);
4339                 }
4340
4341                 cairo_surface_set_device_offset (page_surface,
4342                                                  overlap.x - real_page_area.x,
4343                                                  overlap.y - real_page_area.y);
4344                 cairo_set_source_surface (cr, page_surface, 0, 0);
4345                 cairo_paint (cr);
4346                 cairo_restore (cr);
4347
4348                 /* Get the selection pixbuf iff we have something to draw */
4349                 if (find_selection_for_page (view, page) &&
4350                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4351                         selection_surface =
4352                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4353                                                                        page,
4354                                                                        view->scale,
4355                                                                        NULL);
4356                 }
4357
4358                 if (!selection_surface) {
4359                         return;
4360                 }
4361
4362                 selection_width = cairo_image_surface_get_width (selection_surface);
4363                 selection_height = cairo_image_surface_get_height (selection_surface);
4364
4365                 cairo_save (cr);
4366                 cairo_translate (cr, overlap.x, overlap.y);
4367
4368                 if (width != selection_width || height != selection_height) {
4369                         cairo_pattern_set_filter (cairo_get_source (cr),
4370                                                   CAIRO_FILTER_FAST);
4371                         cairo_scale (cr,
4372                                      (gdouble)width / selection_width,
4373                                      (gdouble)height / selection_height);
4374                 }
4375
4376                 cairo_surface_set_device_offset (selection_surface,
4377                                                  overlap.x - real_page_area.x,
4378                                                  overlap.y - real_page_area.y);
4379                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4380                 cairo_paint (cr);
4381                 cairo_restore (cr);
4382         }
4383 }
4384
4385 /*** GObject functions ***/
4386
4387 static void
4388 ev_view_finalize (GObject *object)
4389 {
4390         EvView *view = EV_VIEW (object);
4391
4392         clear_selection (view);
4393         clear_link_selected (view);
4394
4395         if (view->image_dnd_info.image)
4396                 g_object_unref (view->image_dnd_info.image);
4397         view->image_dnd_info.image = NULL;
4398
4399         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4400 }
4401
4402 static void
4403 ev_view_destroy (GtkObject *object)
4404 {
4405         EvView *view = EV_VIEW (object);
4406
4407         if (view->model) {
4408                 g_object_unref (view->model);
4409                 view->model = NULL;
4410         }
4411
4412         if (view->document) {
4413                 g_object_unref (view->document);
4414                 view->document = NULL;
4415         }
4416
4417         if (view->pixbuf_cache) {
4418                 g_object_unref (view->pixbuf_cache);
4419                 view->pixbuf_cache = NULL;
4420         }
4421
4422         if (view->goto_window) {
4423                 gtk_widget_destroy (view->goto_window);
4424                 view->goto_window = NULL;
4425                 view->goto_entry = NULL;
4426         }
4427
4428         ev_view_window_children_free (view);
4429
4430         if (view->selection_scroll_id) {
4431             g_source_remove (view->selection_scroll_id);
4432             view->selection_scroll_id = 0;
4433         }
4434
4435         if (view->selection_update_id) {
4436             g_source_remove (view->selection_update_id);
4437             view->selection_update_id = 0;
4438         }
4439
4440         if (view->loading_text) {
4441                 cairo_surface_destroy (view->loading_text);
4442                 view->loading_text = NULL;
4443         }
4444
4445         if (view->scroll_info.timeout_id) {
4446             g_source_remove (view->scroll_info.timeout_id);
4447             view->scroll_info.timeout_id = 0;
4448         }
4449
4450         if (view->drag_info.drag_timeout_id) {
4451                 g_source_remove (view->drag_info.drag_timeout_id);
4452                 view->drag_info.drag_timeout_id = 0;
4453         }
4454
4455         if (view->drag_info.release_timeout_id) {
4456                 g_source_remove (view->drag_info.release_timeout_id);
4457                 view->drag_info.release_timeout_id = 0;
4458         }
4459
4460         ev_view_presentation_transition_stop (view);
4461
4462         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4463
4464         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4465 }
4466
4467 static void
4468 ev_view_set_property (GObject      *object,
4469                       guint         prop_id,
4470                       const GValue *value,
4471                       GParamSpec   *pspec)
4472 {
4473         EvView *view = EV_VIEW (object);
4474
4475         switch (prop_id) {
4476                 case PROP_CONTINUOUS:
4477                         ev_view_set_continuous (view, g_value_get_boolean (value));
4478                         break;
4479                 case PROP_DUAL_PAGE:
4480                         ev_view_set_dual_page (view, g_value_get_boolean (value));
4481                         break;
4482                 case PROP_FULLSCREEN:
4483                         ev_view_set_fullscreen (view, g_value_get_boolean (value));
4484                         break;
4485                 case PROP_PRESENTATION:
4486                         ev_view_set_presentation (view, g_value_get_boolean (value));
4487                         break;
4488                 case PROP_SIZING_MODE:
4489                         ev_view_set_sizing_mode (view, g_value_get_enum (value));
4490                         break;
4491                 case PROP_ZOOM:
4492                         ev_view_set_zoom (view, g_value_get_double (value));
4493                         break;
4494                 case PROP_ROTATION:
4495                         ev_view_set_rotation (view, g_value_get_int (value));
4496                         break;
4497                 default:
4498                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4499         }
4500 }
4501
4502 static AtkObject *
4503 ev_view_get_accessible (GtkWidget *widget)
4504 {
4505         static gboolean first_time = TRUE;
4506
4507         if (first_time) {
4508                 AtkObjectFactory *factory;
4509                 AtkRegistry *registry;
4510                 GType derived_type;
4511                 GType derived_atk_type;
4512
4513                 /*
4514                  * Figure out whether accessibility is enabled by looking at the
4515                  * type of the accessible object which would be created for
4516                  * the parent type of EvView.
4517                  */
4518                 derived_type = g_type_parent (EV_TYPE_VIEW);
4519
4520                 registry = atk_get_default_registry ();
4521                 factory = atk_registry_get_factory (registry,
4522                                                     derived_type);
4523                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4524                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4525                         atk_registry_set_factory_type (registry,
4526                                                        EV_TYPE_VIEW,
4527                                                        ev_view_accessible_factory_get_type ());
4528                 first_time = FALSE;
4529         }
4530         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4531 }
4532
4533 static void
4534 ev_view_get_property (GObject *object,
4535                       guint prop_id,
4536                       GValue *value,
4537                       GParamSpec *pspec)
4538 {
4539         EvView *view = EV_VIEW (object);
4540
4541         switch (prop_id) {
4542                 case PROP_CONTINUOUS:
4543                         g_value_set_boolean (value, view->continuous);
4544                         break;
4545                 case PROP_DUAL_PAGE:
4546                         g_value_set_boolean (value, view->dual_page);
4547                         break;
4548                 case PROP_FULLSCREEN:
4549                         g_value_set_boolean (value, view->fullscreen);
4550                         break;
4551                 case PROP_PRESENTATION:
4552                         g_value_set_boolean (value, view->presentation);
4553                         break;
4554                 case PROP_SIZING_MODE:
4555                         g_value_set_enum (value, view->sizing_mode);
4556                         break;
4557                 case PROP_ZOOM:
4558                         g_value_set_double (value, view->scale);
4559                         break;
4560                 case PROP_ROTATION:
4561                         g_value_set_int (value, view->rotation);
4562                         break;
4563                 case PROP_HAS_SELECTION:
4564                         g_value_set_boolean (value,
4565                                              view->selection_info.selections != NULL);
4566                         break;
4567                 default:
4568                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4569         }
4570 }
4571
4572 static void
4573 ev_view_class_init (EvViewClass *class)
4574 {
4575         GObjectClass *object_class = G_OBJECT_CLASS (class);
4576         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4577         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4578         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4579         GtkBindingSet *binding_set;
4580
4581         object_class->finalize = ev_view_finalize;
4582         object_class->set_property = ev_view_set_property;
4583         object_class->get_property = ev_view_get_property;
4584
4585         widget_class->expose_event = ev_view_expose_event;
4586         widget_class->button_press_event = ev_view_button_press_event;
4587         widget_class->motion_notify_event = ev_view_motion_notify_event;
4588         widget_class->button_release_event = ev_view_button_release_event;
4589         widget_class->key_press_event = ev_view_key_press_event;
4590         widget_class->focus_in_event = ev_view_focus_in;
4591         widget_class->focus_out_event = ev_view_focus_out;
4592         widget_class->get_accessible = ev_view_get_accessible;
4593         widget_class->size_request = ev_view_size_request;
4594         widget_class->size_allocate = ev_view_size_allocate;
4595         widget_class->realize = ev_view_realize;
4596         widget_class->scroll_event = ev_view_scroll_event;
4597         widget_class->enter_notify_event = ev_view_enter_notify_event;
4598         widget_class->leave_notify_event = ev_view_leave_notify_event;
4599         widget_class->style_set = ev_view_style_set;
4600         widget_class->drag_data_get = ev_view_drag_data_get;
4601         widget_class->drag_motion = ev_view_drag_motion;
4602         widget_class->popup_menu = ev_view_popup_menu;
4603         widget_class->query_tooltip = ev_view_query_tooltip;
4604
4605         gtk_object_class->destroy = ev_view_destroy;
4606
4607         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4608
4609         class->binding_activated = ev_view_scroll;
4610
4611         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4612                          G_TYPE_FROM_CLASS (object_class),
4613                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4614                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4615                          NULL, NULL,
4616                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4617                          G_TYPE_NONE, 2,
4618                          GTK_TYPE_SCROLL_TYPE,
4619                          G_TYPE_BOOLEAN);
4620         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4621                          G_TYPE_FROM_CLASS (object_class),
4622                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4623                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4624                          NULL, NULL,
4625                          g_cclosure_marshal_VOID__OBJECT,
4626                          G_TYPE_NONE, 1,
4627                          G_TYPE_OBJECT);
4628         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4629                          G_TYPE_FROM_CLASS (object_class),
4630                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4631                          G_STRUCT_OFFSET (EvViewClass, external_link),
4632                          NULL, NULL,
4633                          g_cclosure_marshal_VOID__OBJECT,
4634                          G_TYPE_NONE, 1,
4635                          G_TYPE_OBJECT);
4636         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4637                          G_TYPE_FROM_CLASS (object_class),
4638                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4639                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4640                          NULL, NULL,
4641                          g_cclosure_marshal_VOID__OBJECT,
4642                          G_TYPE_NONE, 1,
4643                          G_TYPE_OBJECT);
4644
4645
4646         g_object_class_install_property (object_class,
4647                                          PROP_CONTINUOUS,
4648                                          g_param_spec_boolean ("continuous",
4649                                                                "Continuous",
4650                                                                "Continuous scrolling mode",
4651                                                                TRUE,
4652                                                                G_PARAM_READWRITE));
4653
4654         g_object_class_install_property (object_class,
4655                                          PROP_DUAL_PAGE,
4656                                          g_param_spec_boolean ("dual-page",
4657                                                                "Dual Page",
4658                                                                "Two pages visible at once",
4659                                                                FALSE,
4660                                                                G_PARAM_READWRITE));
4661         g_object_class_install_property (object_class,
4662                                          PROP_FULLSCREEN,
4663                                          g_param_spec_boolean ("fullscreen",
4664                                                                "Full Screen",
4665                                                                "Draw page in a fullscreen fashion",
4666                                                                FALSE,
4667                                                                G_PARAM_READWRITE));
4668         g_object_class_install_property (object_class,
4669                                          PROP_PRESENTATION,
4670                                          g_param_spec_boolean ("presentation",
4671                                                                "Presentation",
4672                                                                "Draw page in presentation mode",
4673                                                                TRUE,
4674                                                                G_PARAM_READWRITE));
4675
4676         g_object_class_install_property (object_class,
4677                                          PROP_SIZING_MODE,
4678                                          g_param_spec_enum ("sizing-mode",
4679                                                             "Sizing Mode",
4680                                                             "Sizing Mode",
4681                                                             EV_TYPE_SIZING_MODE,
4682                                                             EV_SIZING_FIT_WIDTH,
4683                                                             G_PARAM_READWRITE));
4684
4685         g_object_class_install_property (object_class,
4686                                          PROP_ZOOM,
4687                                          g_param_spec_double ("zoom",
4688                                                               "Zoom factor",
4689                                                               "Zoom factor",
4690                                                               0,
4691                                                               G_MAXDOUBLE,
4692                                                               1.0,
4693                                                               G_PARAM_READWRITE));
4694         g_object_class_install_property (object_class,
4695                                          PROP_ROTATION,
4696                                          g_param_spec_double ("rotation",
4697                                                               "Rotation",
4698                                                               "Rotation",
4699                                                               0,
4700                                                               360,
4701                                                               0,
4702                                                               G_PARAM_READWRITE));
4703
4704         g_object_class_install_property (object_class,
4705                                          PROP_HAS_SELECTION,
4706                                          g_param_spec_boolean ("has-selection",
4707                                                                "Has selection",
4708                                                                "The view has selections",
4709                                                                FALSE,
4710                                                                G_PARAM_READABLE));
4711
4712         binding_set = gtk_binding_set_by_class (class);
4713
4714         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4715         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4716         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4717         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4718         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4719         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4720         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4721         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4722         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4723                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4724         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4725                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4726         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4727                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4728         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4729                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4730
4731 }
4732
4733 static void
4734 ev_view_init (EvView *view)
4735 {
4736         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4737
4738         view->start_page = -1;
4739         view->end_page = -1;
4740         view->spacing = 5;
4741         view->scale = 1.0;
4742         view->current_page = 0;
4743         view->pressed_button = -1;
4744         view->cursor = EV_VIEW_CURSOR_NORMAL;
4745         view->drag_info.in_drag = FALSE;
4746         view->scroll_info.autoscrolling = FALSE;
4747         view->selection_info.selections = NULL;
4748         view->selection_info.in_selection = FALSE;
4749         view->selection_info.in_drag = FALSE;
4750         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4751         view->continuous = TRUE;
4752         view->dual_page = FALSE;
4753         view->presentation = FALSE;
4754         view->presentation_state = EV_PRESENTATION_NORMAL;
4755         view->fullscreen = FALSE;
4756         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4757         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4758         view->jump_to_find_result = TRUE;
4759         view->highlight_find_results = FALSE;
4760
4761         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4762         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4763 }
4764
4765 /*** Callbacks ***/
4766
4767 static void
4768 ev_view_change_page (EvView *view,
4769                      gint    new_page,
4770                      gboolean start_transition)
4771 {
4772         gint x, y;
4773
4774         view->current_page = new_page;
4775         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4776
4777         if (view->presentation && start_transition)
4778                 ev_view_presentation_transition_start (view);
4779
4780         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4781         ev_view_handle_cursor_over_xy (view, x, y);
4782
4783         gtk_widget_queue_resize (GTK_WIDGET (view));
4784 }
4785
4786 static void
4787 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4788                                      EvView                *view)
4789 {
4790         g_object_unref (view->animation);
4791         view->animation = NULL;
4792         ev_view_change_page (view, view->current_page, TRUE);
4793 }
4794
4795 /**
4796  * ev_view_transition_animation_cancel:
4797  * @animation: Animation to finish
4798  * @view: An EvView
4799  *
4800  * Does almost the same as cancel, but without scheduling the transition.
4801  */
4802
4803 static void
4804 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4805                                      EvView                *view)
4806 {
4807         g_object_unref (view->animation);
4808         view->animation = NULL;
4809         ev_view_change_page (view, view->current_page, FALSE);
4810 }
4811
4812 static void
4813 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4814                                     gdouble                progress,
4815                                     EvView                *view)
4816 {
4817         gtk_widget_queue_draw (GTK_WIDGET (view));
4818 }
4819
4820 static void
4821 ev_view_presentation_animation_start (EvView *view,
4822                                       int     new_page)
4823 {
4824         EvTransitionEffect *effect = NULL;
4825         cairo_surface_t *surface;
4826
4827         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4828                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4829                                                             view->current_page);
4830         if (!effect)
4831                 return;
4832
4833         view->animation = ev_transition_animation_new (effect);
4834
4835         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4836         ev_transition_animation_set_origin_surface (view->animation, surface);
4837         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4838         if (surface)
4839                 ev_transition_animation_set_dest_surface (view->animation, surface);
4840
4841         g_signal_connect (view->animation, "frame",
4842                           G_CALLBACK (ev_view_transition_animation_frame), view);
4843         g_signal_connect (view->animation, "finished",
4844                           G_CALLBACK (ev_view_transition_animation_finish), view);
4845 }
4846
4847 static void
4848 job_finished_cb (EvPixbufCache *pixbuf_cache,
4849                  GdkRegion     *region,
4850                  EvView        *view)
4851 {
4852         if (view->animation) {
4853                 cairo_surface_t *surface;
4854
4855                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4856                 ev_transition_animation_set_dest_surface (view->animation, surface);
4857         }
4858
4859         if (region) {
4860                 gdk_window_invalidate_region (view->layout.bin_window,
4861                                               region, TRUE);
4862         } else {
4863                 gtk_widget_queue_draw (GTK_WIDGET (view));
4864         }
4865 }
4866
4867 static void
4868 ev_view_page_changed_cb (EvDocumentModel *model,
4869                          gint             old_page,
4870                          gint             new_page,
4871                          EvView          *view)
4872 {
4873         if (!view->document)
4874                 return;
4875
4876         if (view->current_page != new_page) {
4877                 if (view->presentation)
4878                         ev_view_presentation_animation_start (view, new_page);
4879
4880                 ev_view_change_page (view, new_page, TRUE);
4881         } else {
4882                 gtk_widget_queue_draw (GTK_WIDGET (view));
4883         }
4884
4885         view->find_result = 0;
4886 }
4887
4888 static void
4889 on_adjustment_value_changed (GtkAdjustment *adjustment,
4890                              EvView        *view)
4891 {
4892         int dx = 0, dy = 0;
4893         gint x, y;
4894         GList *children, *l;
4895
4896         if (! GTK_WIDGET_REALIZED (view))
4897                 return;
4898
4899         if (view->hadjustment) {
4900                 dx = view->scroll_x - (int) view->hadjustment->value;
4901                 view->scroll_x = (int) view->hadjustment->value;
4902         } else {
4903                 view->scroll_x = 0;
4904         }
4905
4906         if (view->vadjustment) {
4907                 dy = view->scroll_y - (int) view->vadjustment->value;
4908                 view->scroll_y = (int) view->vadjustment->value;
4909         } else {
4910                 view->scroll_y = 0;
4911         }
4912
4913         children = gtk_container_get_children (GTK_CONTAINER (view));
4914         for (l = children; l && l->data; l = g_list_next (l)) {
4915                 gint       child_x, child_y;
4916                 GtkWidget *child = (GtkWidget *)l->data;
4917
4918                 gtk_container_child_get (GTK_CONTAINER (view),
4919                                          child,
4920                                          "x", &child_x,
4921                                          "y", &child_y,
4922                                          NULL);
4923                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
4924         }
4925         g_list_free (children);
4926
4927         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
4928                 EvViewWindowChild *child;
4929
4930                 child = (EvViewWindowChild *)l->data;
4931
4932                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
4933         }
4934
4935         if (view->pending_resize)
4936                 gtk_widget_queue_draw (GTK_WIDGET (view));
4937         else
4938                 gdk_window_scroll (view->layout.bin_window, dx, dy);
4939
4940         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4941         ev_view_handle_cursor_over_xy (view, x, y);
4942
4943         if (view->document)
4944                 view_update_range_and_current_page (view);
4945 }
4946
4947 GtkWidget*
4948 ev_view_new (void)
4949 {
4950         GtkWidget *view;
4951
4952         view = g_object_new (EV_TYPE_VIEW, NULL);
4953
4954         return view;
4955 }
4956
4957 static void
4958 setup_caches (EvView *view)
4959 {
4960         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
4961         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
4962         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
4963 }
4964
4965 static void
4966 clear_caches (EvView *view)
4967 {
4968         if (view->pixbuf_cache) {
4969                 g_object_unref (view->pixbuf_cache);
4970                 view->pixbuf_cache = NULL;
4971         }
4972 }
4973
4974 void
4975 ev_view_set_loading (EvView       *view,
4976                      gboolean      loading)
4977 {
4978         view->loading = loading;
4979         gtk_widget_queue_draw (GTK_WIDGET (view));
4980 }
4981
4982 static gboolean
4983 ev_view_autoscroll_cb (EvView *view)
4984 {
4985         gdouble speed, value;
4986
4987         /* If the user stops autoscrolling, autoscrolling will be
4988          * set to false but the timeout will continue; stop the timeout: */
4989         if (!view->scroll_info.autoscrolling) {
4990                 view->scroll_info.timeout_id = 0;
4991                 return FALSE;
4992         }
4993
4994         if (view->scroll_info.last_y > view->scroll_info.start_y &&
4995                 (view->scroll_info.last_y < view->scroll_info.start_y))
4996                 return TRUE;
4997
4998         /* Replace 100 with your speed of choice: The lower the faster.
4999          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5000          *      based on the distance of the starting point from the mouse
5001          * (All also effected by the timeout interval of this callback) */
5002
5003         if (view->scroll_info.start_y > view->scroll_info.last_y)
5004                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5005         else
5006                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5007
5008         value = gtk_adjustment_get_value (view->vadjustment);
5009         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5010         gtk_adjustment_set_value (view->vadjustment, value);
5011
5012         return TRUE;
5013
5014 }
5015
5016 void
5017 ev_view_autoscroll_start (EvView *view)
5018 {
5019         gint x, y;
5020
5021         g_return_if_fail (EV_IS_VIEW (view));
5022
5023         if (view->scroll_info.autoscrolling)
5024                 return;
5025
5026         view->scroll_info.autoscrolling = TRUE;
5027         view->scroll_info.timeout_id =
5028                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5029                                view);
5030
5031         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5032         ev_view_handle_cursor_over_xy (view, x, y);
5033 }
5034
5035 void
5036 ev_view_autoscroll_stop (EvView *view)
5037 {
5038         gint x, y;
5039
5040         g_return_if_fail (EV_IS_VIEW (view));
5041
5042         if (!view->scroll_info.autoscrolling)
5043                 return;
5044
5045         view->scroll_info.autoscrolling = FALSE;
5046         if (view->scroll_info.timeout_id) {
5047                 g_source_remove (view->scroll_info.timeout_id);
5048                 view->scroll_info.timeout_id = 0;
5049         }
5050
5051         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5052         ev_view_handle_cursor_over_xy (view, x, y);
5053 }
5054
5055 static void
5056 ev_view_document_changed_cb (EvDocumentModel *model,
5057                              GParamSpec      *pspec,
5058                              EvView          *view)
5059 {
5060         EvDocument *document = ev_document_model_get_document (model);
5061
5062         view->loading = FALSE;
5063
5064         if (document != view->document) {
5065                 clear_caches (view);
5066
5067                 if (view->document) {
5068                         g_object_unref (view->document);
5069                 }
5070
5071                 view->document = document;
5072                 view->find_result = 0;
5073
5074                 if (view->document) {
5075                         g_object_ref (view->document);
5076                         setup_caches (view);
5077                 }
5078
5079                 ev_view_change_page (view,
5080                                      ev_document_model_get_page (model),
5081                                      TRUE);
5082         }
5083 }
5084
5085 static void
5086 ev_view_rotation_changed_cb (EvDocumentModel *model,
5087                              GParamSpec      *pspec,
5088                              EvView          *view)
5089 {
5090         gint rotation = ev_document_model_get_rotation (model);
5091
5092         ev_view_set_rotation (view, rotation);
5093
5094         if (view->pixbuf_cache) {
5095                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5096                 if (!ev_document_is_page_size_uniform (view->document))
5097                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5098                 gtk_widget_queue_resize (GTK_WIDGET (view));
5099         }
5100
5101         ev_view_remove_all (view);
5102
5103         if (rotation != 0)
5104                 clear_selection (view);
5105 }
5106
5107 static void
5108 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5109                                 GParamSpec      *pspec,
5110                                 EvView          *view)
5111 {
5112         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5113
5114         ev_view_set_sizing_mode (view, mode);
5115
5116         if (mode != EV_SIZING_FREE)
5117                 gtk_widget_queue_resize (GTK_WIDGET (view));
5118 }
5119
5120 #define EPSILON 0.0000001
5121 static void
5122 ev_view_scale_changed_cb (EvDocumentModel *model,
5123                           GParamSpec      *pspec,
5124                           EvView          *view)
5125 {
5126         gdouble scale = ev_document_model_get_scale (model);
5127
5128         if (ABS (view->scale - scale) < EPSILON)
5129                 return;
5130
5131         if (view->loading_text) {
5132                 cairo_surface_destroy (view->loading_text);
5133                 view->loading_text = NULL;
5134         }
5135
5136         ev_view_set_zoom (view, scale);
5137
5138         view->pending_resize = TRUE;
5139         gtk_widget_queue_resize (GTK_WIDGET (view));
5140 }
5141
5142 static void
5143 ev_view_continuous_changed_cb (EvDocumentModel *model,
5144                                GParamSpec      *pspec,
5145                                EvView          *view)
5146 {
5147         gboolean continuous = ev_document_model_get_continuous (model);
5148
5149         ev_view_set_continuous (view, continuous);
5150         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5151         gtk_widget_queue_resize (GTK_WIDGET (view));
5152 }
5153
5154 static void
5155 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5156                               GParamSpec      *pspec,
5157                               EvView          *view)
5158 {
5159         gboolean dual_page = ev_document_model_get_dual_page (model);
5160
5161         ev_view_set_dual_page (view, dual_page);
5162         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5163         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5164          * preload_cache_size to be 2 if dual_page is set.
5165          */
5166         gtk_widget_queue_resize (GTK_WIDGET (view));
5167 }
5168
5169 static void
5170 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5171                                GParamSpec      *pspec,
5172                                EvView          *view)
5173 {
5174         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5175
5176         ev_view_set_fullscreen (view, fullscreen);
5177         gtk_widget_queue_resize (GTK_WIDGET (view));
5178 }
5179
5180 void
5181 ev_view_set_model (EvView          *view,
5182                    EvDocumentModel *model)
5183 {
5184         g_return_if_fail (EV_IS_VIEW (view));
5185         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5186
5187         if (model == view->model)
5188                 return;
5189
5190         if (view->model) {
5191                 g_signal_handlers_disconnect_by_func (view->model,
5192                                                       ev_view_document_changed_cb,
5193                                                       view);
5194                 g_signal_handlers_disconnect_by_func (view->model,
5195                                                       ev_view_page_changed_cb,
5196                                                       view);
5197                 g_object_unref (view->model);
5198         }
5199         view->model = g_object_ref (model);
5200         g_signal_connect (view->model, "notify::document",
5201                           G_CALLBACK (ev_view_document_changed_cb),
5202                           view);
5203         g_signal_connect (view->model, "notify::rotation",
5204                           G_CALLBACK (ev_view_rotation_changed_cb),
5205                           view);
5206         g_signal_connect (view->model, "notify::sizing-mode",
5207                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5208                           view);
5209         g_signal_connect (view->model, "notify::scale",
5210                           G_CALLBACK (ev_view_scale_changed_cb),
5211                           view);
5212         g_signal_connect (view->model, "notify::continuous",
5213                           G_CALLBACK (ev_view_continuous_changed_cb),
5214                           view);
5215         g_signal_connect (view->model, "notify::dual-page",
5216                           G_CALLBACK (ev_view_dual_page_changed_cb),
5217                           view);
5218         g_signal_connect (view->model, "notify::fullscreen",
5219                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5220                           view);
5221         g_signal_connect (view->model, "page-changed",
5222                           G_CALLBACK (ev_view_page_changed_cb),
5223                           view);
5224 }
5225
5226 static void
5227 ev_view_reload_page (EvView    *view,
5228                      gint       page,
5229                      GdkRegion *region)
5230 {
5231         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5232                                      region,
5233                                      page,
5234                                      view->rotation,
5235                                      view->scale);
5236 }
5237
5238 void
5239 ev_view_reload (EvView *view)
5240 {
5241         ev_pixbuf_cache_clear (view->pixbuf_cache);
5242         view_update_range_and_current_page (view);
5243 }
5244
5245 /*** Zoom and sizing mode ***/
5246
5247 void
5248 ev_view_set_zoom (EvView   *view,
5249                   double    scale)
5250 {
5251         view->scale = scale;
5252
5253         g_object_notify (G_OBJECT (view), "zoom");
5254 }
5255
5256 double
5257 ev_view_get_zoom (EvView *view)
5258 {
5259         return view->scale;
5260 }
5261
5262 gboolean
5263 ev_view_get_continuous (EvView *view)
5264 {
5265         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5266
5267         return view->continuous;
5268 }
5269
5270 void
5271 ev_view_set_continuous (EvView   *view,
5272                         gboolean  continuous)
5273 {
5274         g_return_if_fail (EV_IS_VIEW (view));
5275
5276         view->continuous = continuous;
5277
5278         g_object_notify (G_OBJECT (view), "continuous");
5279 }
5280
5281 gboolean
5282 ev_view_get_dual_page (EvView *view)
5283 {
5284         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5285
5286         return view->dual_page;
5287 }
5288
5289 void
5290 ev_view_set_dual_page (EvView   *view,
5291                        gboolean  dual_page)
5292 {
5293         g_return_if_fail (EV_IS_VIEW (view));
5294
5295         view->dual_page = dual_page;
5296
5297         g_object_notify (G_OBJECT (view), "dual-page");
5298 }
5299
5300 void
5301 ev_view_set_fullscreen (EvView   *view,
5302                          gboolean  fullscreen)
5303 {
5304         g_return_if_fail (EV_IS_VIEW (view));
5305
5306         view->fullscreen = fullscreen;
5307
5308         g_object_notify (G_OBJECT (view), "fullscreen");
5309 }
5310
5311 gboolean
5312 ev_view_get_fullscreen (EvView *view)
5313 {
5314         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5315
5316         return view->fullscreen;
5317 }
5318
5319 void
5320 ev_view_set_presentation (EvView   *view,
5321                           gboolean  presentation)
5322 {
5323         g_return_if_fail (EV_IS_VIEW (view));
5324
5325         presentation = presentation != FALSE;
5326
5327         if (view->presentation == presentation)
5328                 return;
5329
5330         if (!presentation)
5331                 view->presentation_state = EV_PRESENTATION_NORMAL;
5332
5333         view->presentation = presentation;
5334         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5335
5336         if (presentation) {
5337                 view->sizing_mode_saved = view->sizing_mode;
5338                 view->scale_saved = view->scale;
5339                 ev_view_set_sizing_mode (view, EV_SIZING_BEST_FIT);
5340         } else {
5341                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5342                 ev_document_model_set_scale (view->model, view->scale_saved);
5343         }
5344
5345         gtk_widget_queue_resize (GTK_WIDGET (view));
5346
5347         if (presentation)
5348                 ev_view_presentation_transition_start (view);
5349         else {
5350                 ev_view_presentation_transition_stop (view);
5351
5352                 if (view->animation) {
5353                         /* stop any running animation */
5354                         ev_view_transition_animation_cancel (view->animation, view);
5355                 }
5356         }
5357
5358         if (GTK_WIDGET_REALIZED (view)) {
5359                 if (view->presentation)
5360                         gdk_window_set_background (view->layout.bin_window,
5361                                                    &GTK_WIDGET (view)->style->black);
5362                 else
5363                         gdk_window_set_background (view->layout.bin_window,
5364                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5365         }
5366
5367         g_object_notify (G_OBJECT (view), "presentation");
5368 }
5369
5370 gboolean
5371 ev_view_get_presentation (EvView *view)
5372 {
5373         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5374
5375         return view->presentation;
5376 }
5377
5378 static gboolean
5379 transition_next_page (EvView *view)
5380 {
5381         ev_view_next_page (view);
5382
5383         return FALSE;
5384 }
5385
5386 static void
5387 ev_view_presentation_transition_stop (EvView *view)
5388 {
5389         if (view->trans_timeout_id > 0)
5390                 g_source_remove (view->trans_timeout_id);
5391         view->trans_timeout_id = 0;
5392 }
5393
5394 static void
5395 ev_view_presentation_transition_start (EvView *view)
5396 {
5397         gdouble duration;
5398
5399         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5400                 return;
5401
5402         ev_view_presentation_transition_stop (view);
5403
5404         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5405                                                              view->current_page);
5406         if (duration > 0) {
5407                 view->trans_timeout_id =
5408                         g_timeout_add_seconds (duration,
5409                                                (GSourceFunc) transition_next_page,
5410                                                view);
5411         }
5412 }
5413
5414 void
5415 ev_view_set_sizing_mode (EvView       *view,
5416                          EvSizingMode  sizing_mode)
5417 {
5418         view->sizing_mode = sizing_mode;
5419
5420         g_object_notify (G_OBJECT (view), "sizing-mode");
5421 }
5422
5423 EvSizingMode
5424 ev_view_get_sizing_mode (EvView *view)
5425 {
5426         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
5427
5428         return view->sizing_mode;
5429 }
5430
5431 gboolean
5432 ev_view_can_zoom_in (EvView *view)
5433 {
5434         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5435 }
5436
5437 gboolean
5438 ev_view_can_zoom_out (EvView *view)
5439 {
5440         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5441 }
5442
5443 void
5444 ev_view_zoom_in (EvView *view)
5445 {
5446         gdouble scale;
5447
5448         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5449
5450         if (view->presentation)
5451                 return;
5452
5453         view->pending_scroll = SCROLL_TO_CENTER;
5454         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5455         ev_document_model_set_scale (view->model, scale);
5456 }
5457
5458 void
5459 ev_view_zoom_out (EvView *view)
5460 {
5461         gdouble scale;
5462
5463         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5464
5465         if (view->presentation)
5466                 return;
5467
5468         view->pending_scroll = SCROLL_TO_CENTER;
5469         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5470         ev_document_model_set_scale (view->model, scale);
5471 }
5472
5473 void
5474 ev_view_set_rotation (EvView *view, int rotation)
5475 {
5476         view->rotation = rotation;
5477
5478         g_object_notify (G_OBJECT (view), "rotation");
5479 }
5480
5481 int
5482 ev_view_get_rotation (EvView *view)
5483 {
5484         return view->rotation;
5485 }
5486
5487 static double
5488 zoom_for_size_fit_width (gdouble doc_width,
5489                          gdouble doc_height,
5490                          int     target_width,
5491                          int     target_height)
5492 {
5493         double scale;
5494
5495         scale = (double)target_width / doc_width;
5496
5497         if (doc_height * scale > target_height)
5498                 scale = (double)target_width / doc_width;
5499
5500         return scale;
5501 }
5502
5503 static double
5504 zoom_for_size_fit_height (gdouble doc_width,
5505                           gdouble doc_height,
5506                           int     target_width,
5507                           int     target_height)
5508 {
5509         double scale;
5510
5511         scale = (double)target_height / doc_height;
5512
5513         if (doc_width * scale > target_width)
5514                 scale = (double)target_height / doc_height;
5515
5516         return scale;
5517 }
5518
5519 static double
5520 zoom_for_size_best_fit (gdouble doc_width,
5521                         gdouble doc_height,
5522                         int     target_width,
5523                         int     target_height)
5524 {
5525         double w_scale;
5526         double h_scale;
5527
5528         w_scale = (double)target_width / doc_width;
5529         h_scale = (double)target_height / doc_height;
5530
5531         if (doc_height * w_scale > target_height)
5532                 w_scale = (double)target_width / doc_width;
5533         if (doc_width * h_scale > target_width)
5534                 h_scale = (double)target_height / doc_height;
5535
5536         return MIN (w_scale, h_scale);
5537 }
5538
5539
5540 static void
5541 ev_view_zoom_for_size_presentation (EvView *view,
5542                                     int     width,
5543                                     int     height)
5544 {
5545         gdouble doc_width, doc_height;
5546         gdouble scale;
5547
5548         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5549         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5550         ev_document_model_set_scale (view->model, scale);
5551 }
5552
5553 static void
5554 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5555                                                 int     width,
5556                                                 int     height)
5557 {
5558         gdouble doc_width, doc_height;
5559         GtkBorder border;
5560         gdouble scale;
5561
5562         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5563         if (view->rotation == 90 || view->rotation == 270) {
5564                 gdouble tmp;
5565
5566                 tmp = doc_width;
5567                 doc_width = doc_height;
5568                 doc_height = tmp;
5569         }
5570
5571         compute_border (view, doc_width, doc_height, &border);
5572
5573         doc_width *= 2;
5574         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5575         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5576
5577         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5578                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5579         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5580                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5581         else
5582                 g_assert_not_reached ();
5583
5584         ev_document_model_set_scale (view->model, scale);
5585 }
5586
5587 static void
5588 ev_view_zoom_for_size_continuous (EvView *view,
5589                                   int     width,
5590                                   int     height)
5591 {
5592         gdouble doc_width, doc_height;
5593         GtkBorder border;
5594         gdouble scale;
5595
5596         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5597         if (view->rotation == 90 || view->rotation == 270) {
5598                 gdouble tmp;
5599
5600                 tmp = doc_width;
5601                 doc_width = doc_height;
5602                 doc_height = tmp;
5603         }
5604
5605         compute_border (view, doc_width, doc_height, &border);
5606
5607         width -= (border.left + border.right + 2 * view->spacing);
5608         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5609
5610         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5611                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5612         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5613                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5614         else
5615                 g_assert_not_reached ();
5616
5617         ev_document_model_set_scale (view->model, scale);
5618 }
5619
5620 static void
5621 ev_view_zoom_for_size_dual_page (EvView *view,
5622                                  int     width,
5623                                  int     height)
5624 {
5625         GtkBorder border;
5626         gdouble doc_width, doc_height;
5627         gdouble scale;
5628         gint other_page;
5629
5630         other_page = view->current_page ^ 1;
5631
5632         /* Find the largest of the two. */
5633         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5634         if (other_page < ev_document_get_n_pages (view->document)) {
5635                 gdouble width_2, height_2;
5636
5637                 get_doc_page_size (view, other_page, &width_2, &height_2);
5638                 if (width_2 > doc_width)
5639                         doc_width = width_2;
5640                 if (height_2 > doc_height)
5641                         doc_height = height_2;
5642         }
5643         compute_border (view, width, height, &border);
5644
5645         doc_width = doc_width * 2;
5646         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5647         height -= (border.top + border.bottom + 2 * view->spacing);
5648
5649         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5650                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5651         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5652                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5653         else
5654                 g_assert_not_reached ();
5655
5656         ev_document_model_set_scale (view->model, scale);
5657 }
5658
5659 static void
5660 ev_view_zoom_for_size_single_page (EvView *view,
5661                                    int     width,
5662                                    int     height)
5663 {
5664         gdouble doc_width, doc_height;
5665         GtkBorder border;
5666         gdouble scale;
5667
5668         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5669
5670         /* Get an approximate border */
5671         compute_border (view, width, height, &border);
5672
5673         width -= (border.left + border.right + 2 * view->spacing);
5674         height -= (border.top + border.bottom + 2 * view->spacing);
5675
5676         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
5677                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height);
5678         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5679                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5680         else
5681                 g_assert_not_reached ();
5682
5683         ev_document_model_set_scale (view->model, scale);
5684 }
5685
5686 static void
5687 ev_view_zoom_for_size (EvView *view,
5688                        int     width,
5689                        int     height)
5690 {
5691         g_return_if_fail (EV_IS_VIEW (view));
5692         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5693                           view->sizing_mode == EV_SIZING_BEST_FIT);
5694         g_return_if_fail (width >= 0);
5695         g_return_if_fail (height >= 0);
5696
5697         if (view->document == NULL)
5698                 return;
5699
5700         if (view->presentation)
5701                 ev_view_zoom_for_size_presentation (view, width, height);
5702         else if (view->continuous && view->dual_page)
5703                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5704         else if (view->continuous)
5705                 ev_view_zoom_for_size_continuous (view, width, height);
5706         else if (view->dual_page)
5707                 ev_view_zoom_for_size_dual_page (view, width, height);
5708         else
5709                 ev_view_zoom_for_size_single_page (view, width, height);
5710 }
5711
5712 /*** Find ***/
5713 static gint
5714 ev_view_find_get_n_results (EvView *view, gint page)
5715 {
5716         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5717 }
5718
5719 static EvRectangle *
5720 ev_view_find_get_result (EvView *view, gint page, gint result)
5721 {
5722         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5723 }
5724
5725 static void
5726 jump_to_find_result (EvView *view)
5727 {
5728         gint n_results;
5729         gint page = view->current_page;
5730
5731         n_results = ev_view_find_get_n_results (view, page);
5732
5733         if (n_results > 0 && view->find_result < n_results) {
5734                 EvRectangle *rect;
5735                 GdkRectangle view_rect;
5736
5737                 rect = ev_view_find_get_result (view, page, view->find_result);
5738                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5739                 ensure_rectangle_is_visible (view, &view_rect);
5740                 view->jump_to_find_result = FALSE;
5741         }
5742 }
5743
5744 /**
5745  * jump_to_find_page
5746  * @view: #EvView instance
5747  * @direction: Direction to look
5748  * @shift: Shift from current page
5749  *
5750  * Jumps to the first page that has occurences of searched word.
5751  * Uses a direction where to look and a shift from current page.
5752  *
5753  */
5754 static void
5755 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5756 {
5757         int n_pages, i;
5758
5759         n_pages = ev_document_get_n_pages (view->document);
5760
5761         for (i = 0; i < n_pages; i++) {
5762                 int page;
5763
5764                 if (direction == EV_VIEW_FIND_NEXT)
5765                         page = view->current_page + i;
5766                 else
5767                         page = view->current_page - i;
5768                 page += shift;
5769
5770                 if (page >= n_pages) {
5771                         page = page - n_pages;
5772                 } else if (page < 0)
5773                         page = page + n_pages;
5774
5775                 if (ev_view_find_get_n_results (view, page) > 0) {
5776                         ev_document_model_set_page (view->model, page);
5777                         break;
5778                 }
5779         }
5780 }
5781
5782 void
5783 ev_view_find_changed (EvView *view, GList **results, gint page)
5784 {
5785         view->find_pages = results;
5786
5787         if (view->jump_to_find_result == TRUE) {
5788                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5789                 jump_to_find_result (view);
5790         }
5791
5792         if (view->current_page == page)
5793                 gtk_widget_queue_draw (GTK_WIDGET (view));
5794 }
5795
5796 void
5797 ev_view_find_next (EvView *view)
5798 {
5799         gint n_results;
5800
5801         n_results = ev_view_find_get_n_results (view, view->current_page);
5802         view->find_result++;
5803
5804         if (view->find_result >= n_results) {
5805                 view->find_result = 0;
5806                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5807                 jump_to_find_result (view);
5808         } else {
5809                 jump_to_find_result (view);
5810                 gtk_widget_queue_draw (GTK_WIDGET (view));
5811         }
5812 }
5813
5814 void
5815 ev_view_find_previous (EvView *view)
5816 {
5817         view->find_result--;
5818
5819         if (view->find_result < 0) {
5820                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5821                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5822                 jump_to_find_result (view);
5823         } else {
5824                 jump_to_find_result (view);
5825                 gtk_widget_queue_draw (GTK_WIDGET (view));
5826         }
5827 }
5828
5829 void
5830 ev_view_find_search_changed (EvView *view)
5831 {
5832         /* search string has changed, focus on new search result */
5833         view->jump_to_find_result = TRUE;
5834         view->find_pages = NULL;
5835 }
5836
5837 void
5838 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5839 {
5840         view->highlight_find_results = value;
5841         gtk_widget_queue_draw (GTK_WIDGET (view));
5842 }
5843
5844 void
5845 ev_view_find_cancel (EvView *view)
5846 {
5847         view->find_pages = NULL;
5848 }
5849
5850 /*** Selections ***/
5851
5852 /* compute_new_selection_rect/text calculates the area currently selected by
5853  * view_rect.  each handles a different mode;
5854  */
5855 static GList *
5856 compute_new_selection_rect (EvView       *view,
5857                             GdkPoint     *start,
5858                             GdkPoint     *stop)
5859 {
5860         GdkRectangle view_rect;
5861         int n_pages, i;
5862         GList *list = NULL;
5863
5864         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5865
5866         view_rect.x = MIN (start->x, stop->x);
5867         view_rect.y = MIN (start->y, stop->y);
5868         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5869         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5870
5871         n_pages = ev_document_get_n_pages (view->document);
5872
5873         for (i = 0; i < n_pages; i++) {
5874                 GdkRectangle page_area;
5875                 GtkBorder border;
5876
5877                 if (get_page_extents (view, i, &page_area, &border)) {
5878                         GdkRectangle overlap;
5879
5880                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5881                                 EvViewSelection *selection;
5882
5883                                 selection = g_new0 (EvViewSelection, 1);
5884                                 selection->page = i;
5885                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5886                                                        &(selection->rect));
5887
5888                                 list = g_list_append (list, selection);
5889                         }
5890                 }
5891         }
5892
5893         return list;
5894 }
5895
5896 static gboolean
5897 gdk_rectangle_point_in (GdkRectangle *rectangle,
5898                         GdkPoint     *point)
5899 {
5900         return rectangle->x <= point->x &&
5901                 rectangle->y <= point->y &&
5902                 point->x < rectangle->x + rectangle->width &&
5903                 point->y < rectangle->y + rectangle->height;
5904 }
5905
5906 static GList *
5907 compute_new_selection_text (EvView          *view,
5908                             EvSelectionStyle style,
5909                             GdkPoint        *start,
5910                             GdkPoint        *stop)
5911 {
5912         int n_pages, i, first, last;
5913         GList *list = NULL;
5914         EvViewSelection *selection;
5915         gdouble width, height;
5916         int start_page, end_page;
5917
5918         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5919
5920         n_pages = ev_document_get_n_pages (view->document);
5921
5922         /* First figure out the range of pages the selection
5923          * affects. */
5924         first = n_pages;
5925         last = 0;
5926         if (view->continuous) {
5927                 start_page = 0;
5928                 end_page = n_pages;
5929         } else if (view->dual_page) {
5930                 start_page = view->start_page;
5931                 end_page = view->end_page + 1;
5932         } else {
5933                 start_page = view->current_page;
5934                 end_page = view->current_page + 1;
5935         }
5936
5937         for (i = start_page; i < end_page; i++) {
5938                 GdkRectangle page_area;
5939                 GtkBorder border;
5940
5941                 get_page_extents (view, i, &page_area, &border);
5942                 if (gdk_rectangle_point_in (&page_area, start) ||
5943                     gdk_rectangle_point_in (&page_area, stop)) {
5944                         if (first == n_pages)
5945                                 first = i;
5946                         last = i;
5947                 }
5948
5949         }
5950
5951         /* Now create a list of EvViewSelection's for the affected
5952          * pages.  This could be an empty list, a list of just one
5953          * page or a number of pages.*/
5954         for (i = first; i < last + 1; i++) {
5955                 GdkRectangle page_area;
5956                 GtkBorder border;
5957                 GdkPoint *point;
5958
5959                 get_doc_page_size (view, i, &width, &height);
5960
5961                 selection = g_new0 (EvViewSelection, 1);
5962                 selection->page = i;
5963                 selection->style = style;
5964                 selection->rect.x1 = selection->rect.y1 = 0;
5965                 selection->rect.x2 = width;
5966                 selection->rect.y2 = height;
5967
5968                 get_page_extents (view, i, &page_area, &border);
5969
5970                 if (gdk_rectangle_point_in (&page_area, start))
5971                         point = start;
5972                 else
5973                         point = stop;
5974
5975                 if (i == first)
5976                         view_point_to_doc_point (view, point, &page_area,
5977                                                  &selection->rect.x1,
5978                                                  &selection->rect.y1);
5979
5980                 /* If the selection is contained within just one page,
5981                  * make sure we don't write 'start' into both points
5982                  * in selection->rect. */
5983                 if (first == last)
5984                         point = stop;
5985
5986                 if (i == last)
5987                         view_point_to_doc_point (view, point, &page_area,
5988                                                  &selection->rect.x2,
5989                                                  &selection->rect.y2);
5990
5991                 list = g_list_append (list, selection);
5992         }
5993
5994         return list;
5995 }
5996
5997 /* This function takes the newly calculated list, and figures out which regions
5998  * have changed.  It then queues a redraw approporiately.
5999  */
6000 static void
6001 merge_selection_region (EvView *view,
6002                         GList  *new_list)
6003 {
6004         GList *old_list;
6005         GList *new_list_ptr, *old_list_ptr;
6006
6007         /* Update the selection */
6008         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
6009         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6010         g_list_free (view->selection_info.selections);
6011         view->selection_info.selections = new_list;
6012         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
6013         g_object_notify (G_OBJECT (view), "has-selection");
6014
6015         new_list_ptr = new_list;
6016         old_list_ptr = old_list;
6017
6018         while (new_list_ptr || old_list_ptr) {
6019                 EvViewSelection *old_sel, *new_sel;
6020                 int cur_page;
6021                 GdkRegion *region = NULL;
6022
6023                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6024                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6025
6026                 /* Assume that the lists are in order, and we run through them
6027                  * comparing them, one page at a time.  We come out with the
6028                  * first page we see. */
6029                 if (new_sel && old_sel) {
6030                         if (new_sel->page < old_sel->page) {
6031                                 new_list_ptr = new_list_ptr->next;
6032                                 old_sel = NULL;
6033                         } else if (new_sel->page > old_sel->page) {
6034                                 old_list_ptr = old_list_ptr->next;
6035                                 new_sel = NULL;
6036                         } else {
6037                                 new_list_ptr = new_list_ptr->next;
6038                                 old_list_ptr = old_list_ptr->next;
6039                         }
6040                 } else if (new_sel) {
6041                         new_list_ptr = new_list_ptr->next;
6042                 } else if (old_sel) {
6043                         old_list_ptr = old_list_ptr->next;
6044                 }
6045
6046                 g_assert (new_sel || old_sel);
6047
6048                 /* is the page we're looking at on the screen?*/
6049                 cur_page = new_sel ? new_sel->page : old_sel->page;
6050                 if (cur_page < view->start_page || cur_page > view->end_page)
6051                         continue;
6052
6053                 /* seed the cache with a new page.  We are going to need the new
6054                  * region too. */
6055                 if (new_sel) {
6056                         GdkRegion *tmp_region = NULL;
6057
6058                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6059                                                                cur_page,
6060                                                                view->scale,
6061                                                                &tmp_region);
6062
6063                         if (tmp_region) {
6064                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6065                         }
6066                 }
6067
6068                 /* Now we figure out what needs redrawing */
6069                 if (old_sel && new_sel) {
6070                         if (old_sel->covered_region && new_sel->covered_region) {
6071                                 /* We only want to redraw the areas that have
6072                                  * changed, so we xor the old and new regions
6073                                  * and redraw if it's different */
6074                                 region = gdk_region_copy (old_sel->covered_region);
6075                                 gdk_region_xor (region, new_sel->covered_region);
6076                                 if (gdk_region_empty (region)) {
6077                                         gdk_region_destroy (region);
6078                                         region = NULL;
6079                                 }
6080                         } else if (old_sel->covered_region) {
6081                                 region = gdk_region_copy (old_sel->covered_region);
6082                         } else if (new_sel->covered_region) {
6083                                 region = gdk_region_copy (new_sel->covered_region);
6084                         }
6085                 } else if (old_sel && !new_sel) {
6086                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6087                                 region = gdk_region_copy (old_sel->covered_region);
6088                         }
6089                 } else if (!old_sel && new_sel) {
6090                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6091                                 region = gdk_region_copy (new_sel->covered_region);
6092                         }
6093                 } else {
6094                         g_assert_not_reached ();
6095                 }
6096
6097                 /* Redraw the damaged region! */
6098                 if (region) {
6099                         GdkRectangle page_area;
6100                         GtkBorder border;
6101
6102                         /* I don't know why but the region is smaller
6103                          * than expected. This hack fixes it, I guess
6104                          * 10 pixels more won't hurt
6105                          */
6106                         gdk_region_shrink (region, -5, -5);
6107
6108                         get_page_extents (view, cur_page, &page_area, &border);
6109                         gdk_region_offset (region,
6110                                            page_area.x + border.left - view->scroll_x,
6111                                            page_area.y + border.top - view->scroll_y);
6112                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6113                         gdk_region_destroy (region);
6114                 }
6115         }
6116
6117         /* Free the old list, now that we're done with it. */
6118         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6119         g_list_free (old_list);
6120 }
6121
6122 static void
6123 compute_selections (EvView          *view,
6124                     EvSelectionStyle style,
6125                     GdkPoint        *start,
6126                     GdkPoint        *stop)
6127 {
6128         GList *list;
6129
6130         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6131                 list = compute_new_selection_rect (view, start, stop);
6132         else
6133                 list = compute_new_selection_text (view, style, start, stop);
6134         merge_selection_region (view, list);
6135 }
6136
6137 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6138  */
6139 static void
6140 selection_free (EvViewSelection *selection)
6141 {
6142         if (selection->covered_region)
6143                 gdk_region_destroy (selection->covered_region);
6144         g_free (selection);
6145 }
6146
6147 static void
6148 clear_selection (EvView *view)
6149 {
6150         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6151         g_list_free (view->selection_info.selections);
6152         view->selection_info.selections = NULL;
6153         view->selection_info.in_selection = FALSE;
6154         if (view->pixbuf_cache)
6155                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6156         g_object_notify (G_OBJECT (view), "has-selection");
6157 }
6158
6159 void
6160 ev_view_select_all (EvView *view)
6161 {
6162         GList *selections = NULL;
6163         int n_pages, i;
6164
6165         /* Disable selection on rotated pages for the 0.4.0 series */
6166         if (view->rotation != 0)
6167                 return;
6168
6169         clear_selection (view);
6170
6171         n_pages = ev_document_get_n_pages (view->document);
6172         for (i = 0; i < n_pages; i++) {
6173                 gdouble width, height;
6174                 EvViewSelection *selection;
6175
6176                 get_doc_page_size (view, i, &width, &height);
6177
6178                 selection = g_new0 (EvViewSelection, 1);
6179                 selection->page = i;
6180                 selection->style = EV_SELECTION_STYLE_GLYPH;
6181                 selection->rect.x1 = selection->rect.y1 = 0;
6182                 selection->rect.x2 = width;
6183                 selection->rect.y2 = height;
6184
6185                 selections = g_list_append (selections, selection);
6186         }
6187
6188         merge_selection_region (view, selections);
6189         gtk_widget_queue_draw (GTK_WIDGET (view));
6190 }
6191
6192 gboolean
6193 ev_view_get_has_selection (EvView *view)
6194 {
6195         return view->selection_info.selections != NULL;
6196 }
6197
6198 static char *
6199 get_selected_text (EvView *view)
6200 {
6201         GString *text;
6202         GList *l;
6203         gchar *normalized_text;
6204         EvRenderContext *rc;
6205
6206         text = g_string_new (NULL);
6207         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6208
6209         ev_document_doc_mutex_lock ();
6210
6211         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6212                 EvViewSelection *selection = (EvViewSelection *)l->data;
6213                 EvPage *page;
6214                 gchar *tmp;
6215
6216                 page = ev_document_get_page (view->document, selection->page);
6217                 ev_render_context_set_page (rc, page);
6218                 g_object_unref (page);
6219
6220                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6221                                                       rc, selection->style,
6222                                                       &(selection->rect));
6223
6224                 g_string_append (text, tmp);
6225                 g_free (tmp);
6226         }
6227
6228         g_object_unref (rc);
6229
6230         ev_document_doc_mutex_unlock ();
6231
6232         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6233         g_string_free (text, TRUE);
6234         return normalized_text;
6235 }
6236
6237 static void
6238 ev_view_clipboard_copy (EvView      *view,
6239                         const gchar *text)
6240 {
6241         GtkClipboard *clipboard;
6242
6243         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6244                                               GDK_SELECTION_CLIPBOARD);
6245         gtk_clipboard_set_text (clipboard, text, -1);
6246 }
6247
6248 void
6249 ev_view_copy (EvView *ev_view)
6250 {
6251         char *text;
6252
6253         if (!EV_IS_SELECTION (ev_view->document))
6254                 return;
6255
6256         text = get_selected_text (ev_view);
6257         ev_view_clipboard_copy (ev_view, text);
6258         g_free (text);
6259 }
6260
6261 static void
6262 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6263                         GtkSelectionData *selection_data,
6264                         guint             info,
6265                         gpointer          data)
6266 {
6267         EvView *ev_view = EV_VIEW (data);
6268
6269         if (ev_view->link_selected) {
6270                 gtk_selection_data_set_text (selection_data,
6271                                              ev_link_action_get_uri (ev_view->link_selected),
6272                                              -1);
6273         } else if (EV_IS_SELECTION (ev_view->document) &&
6274                    ev_view->selection_info.selections) {
6275                 gchar *text;
6276
6277                 text = get_selected_text (ev_view);
6278                 if (text) {
6279                         gtk_selection_data_set_text (selection_data, text, -1);
6280                         g_free (text);
6281                 }
6282         }
6283 }
6284
6285 static void
6286 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6287                           gpointer      data)
6288 {
6289         EvView *view = EV_VIEW (data);
6290
6291         clear_selection (view);
6292         clear_link_selected (view);
6293 }
6294
6295 static void
6296 ev_view_update_primary_selection (EvView *ev_view)
6297 {
6298         GtkClipboard *clipboard;
6299
6300         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6301                                               GDK_SELECTION_PRIMARY);
6302
6303         if (ev_view->selection_info.selections || ev_view->link_selected) {
6304                 GtkTargetList *target_list;
6305                 GtkTargetEntry *targets;
6306                 int n_targets;
6307
6308                 target_list = gtk_target_list_new (NULL, 0);
6309                 gtk_target_list_add_text_targets (target_list, 0);
6310                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6311                 gtk_target_list_unref (target_list);
6312
6313                 if (!gtk_clipboard_set_with_owner (clipboard,
6314                                                    targets, n_targets,
6315                                                    ev_view_primary_get_cb,
6316                                                    ev_view_primary_clear_cb,
6317                                                    G_OBJECT (ev_view)))
6318                         ev_view_primary_clear_cb (clipboard, ev_view);
6319
6320                 gtk_target_table_free (targets, n_targets);
6321         } else {
6322                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6323                         gtk_clipboard_clear (clipboard);
6324         }
6325 }
6326
6327 static void
6328 clear_link_selected (EvView *view)
6329 {
6330         if (view->link_selected) {
6331                 g_object_unref (view->link_selected);
6332                 view->link_selected = NULL;
6333         }
6334 }
6335
6336 void
6337 ev_view_copy_link_address (EvView       *view,
6338                            EvLinkAction *action)
6339 {
6340         clear_link_selected (view);
6341
6342         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6343
6344         view->link_selected = g_object_ref (action);
6345         ev_view_update_primary_selection (view);
6346 }
6347
6348 /*** Cursor operations ***/
6349
6350 static GdkCursor *
6351 ev_view_create_invisible_cursor(void)
6352 {
6353        GdkBitmap *empty;
6354        GdkColor black = { 0, 0, 0, 0 };
6355        static char bits[] = { 0x00 };
6356
6357        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6358
6359        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6360 }
6361
6362 static void
6363 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6364 {
6365         GdkCursor *cursor = NULL;
6366         GdkDisplay *display;
6367         GtkWidget *widget;
6368
6369         if (view->cursor == new_cursor) {
6370                 return;
6371         }
6372
6373         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6374         display = gtk_widget_get_display (widget);
6375         view->cursor = new_cursor;
6376
6377         switch (new_cursor) {
6378                 case EV_VIEW_CURSOR_NORMAL:
6379                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6380                         break;
6381                 case EV_VIEW_CURSOR_IBEAM:
6382                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6383                         break;
6384                 case EV_VIEW_CURSOR_LINK:
6385                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6386                         break;
6387                 case EV_VIEW_CURSOR_WAIT:
6388                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6389                         break;
6390                 case EV_VIEW_CURSOR_HIDDEN:
6391                         cursor = ev_view_create_invisible_cursor ();
6392                         break;
6393                 case EV_VIEW_CURSOR_DRAG:
6394                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6395                         break;
6396                 case EV_VIEW_CURSOR_AUTOSCROLL:
6397                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6398                         break;
6399         }
6400
6401         if (cursor) {
6402                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6403                 gdk_cursor_unref (cursor);
6404                 gdk_flush();
6405         }
6406 }
6407
6408 void
6409 ev_view_hide_cursor (EvView *view)
6410 {
6411        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6412 }
6413
6414 void
6415 ev_view_show_cursor (EvView *view)
6416 {
6417        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6418 }
6419
6420 static void
6421 ev_view_reset_presentation_state (EvView *view)
6422 {
6423         if (!view->presentation ||
6424             view->presentation_state == EV_PRESENTATION_NORMAL)
6425                 return;
6426
6427         view->presentation_state = EV_PRESENTATION_NORMAL;
6428         gdk_window_set_background (view->layout.bin_window,
6429                                    &GTK_WIDGET (view)->style->black);
6430         gtk_widget_queue_draw (GTK_WIDGET (view));
6431 }
6432
6433 gboolean
6434 ev_view_next_page (EvView *view)
6435 {
6436         int page, n_pages;
6437
6438         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6439
6440         if (!view->document)
6441                 return FALSE;
6442
6443         if (view->presentation &&
6444             (view->presentation_state == EV_PRESENTATION_BLACK ||
6445              view->presentation_state == EV_PRESENTATION_WHITE)) {
6446                 ev_view_reset_presentation_state (view);
6447                 return FALSE;
6448         }
6449
6450         if (view->animation) {
6451                 ev_view_transition_animation_cancel (view->animation, view);
6452         }
6453
6454         ev_view_presentation_transition_stop (view);
6455         ev_view_reset_presentation_state (view);
6456
6457         page = ev_document_model_get_page (view->model);
6458         n_pages = ev_document_get_n_pages (view->document);
6459
6460         if (view->dual_page && !view->presentation)
6461                 page = page + 2;
6462         else
6463                 page = page + 1;
6464
6465         if (page < n_pages) {
6466                 ev_document_model_set_page (view->model, page);
6467                 return TRUE;
6468         } else if (view->presentation && page == n_pages) {
6469                 view->presentation_state = EV_PRESENTATION_END;
6470                 gtk_widget_queue_draw (GTK_WIDGET (view));
6471                 return TRUE;
6472         } else if (view->dual_page && page == n_pages) {
6473                 ev_document_model_set_page (view->model, page - 1);
6474                 return TRUE;
6475         } else {
6476                 return FALSE;
6477         }
6478 }
6479
6480 gboolean
6481 ev_view_previous_page (EvView *view)
6482 {
6483         int page;
6484
6485         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6486
6487         if (!view->document)
6488                 return FALSE;
6489
6490         if (view->presentation &&
6491             view->presentation_state == EV_PRESENTATION_END) {
6492                 ev_view_reset_presentation_state (view);
6493                 return TRUE;
6494         }
6495
6496         if (view->presentation &&
6497             (view->presentation_state == EV_PRESENTATION_BLACK ||
6498              view->presentation_state == EV_PRESENTATION_WHITE)) {
6499                 ev_view_reset_presentation_state (view);
6500                 return FALSE;
6501         }
6502
6503         if (view->animation) {
6504                 ev_view_transition_animation_cancel (view->animation, view);
6505         }
6506
6507         ev_view_reset_presentation_state (view);
6508
6509         page = ev_document_model_get_page (view->model);
6510
6511         if (view->dual_page && !view->presentation)
6512                 page = page - 2;
6513         else
6514                 page = page - 1;
6515
6516         if (page >= 0) {
6517                 ev_document_model_set_page (view->model, page);
6518                 return TRUE;
6519         } else if (ev_view_get_dual_page (view) && page == -1) {
6520                 ev_document_model_set_page (view->model, 0);
6521                 return TRUE;
6522         } else {
6523                 return FALSE;
6524         }
6525 }
6526