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-page-cache.h"
  39 #include "ev-transition-animation.h"
  40 #include "ev-view-marshal.h"
  41 #include "ev-document-annotations.h"
  42 #include "ev-annotation-window.h"
  43 #include "ev-view.h"
  44 #include "ev-view-accessible.h"
  45 #include "ev-view-private.h"
  46 #include "ev-view-type-builtins.h"
  47
  48 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  49 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  50 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  51
  52 enum {
  53         PROP_0,
  54         PROP_PRESENTATION,
  55         PROP_HAS_SELECTION
  56 };
  57
  58 enum {
  59         SIGNAL_BINDING_ACTIVATED,
  60         SIGNAL_HANDLE_LINK,
  61         SIGNAL_EXTERNAL_LINK,
  62         SIGNAL_POPUP_MENU,
  63         N_SIGNALS,
  64 };
  65
  66 enum {
  67         TARGET_DND_URI,
  68         TARGET_DND_TEXT,
  69         TARGET_DND_IMAGE
  70 };
  71
  72 static guint signals[N_SIGNALS];
  73
  74 typedef enum {
  75         EV_VIEW_FIND_NEXT,
  76         EV_VIEW_FIND_PREV
  77 } EvViewFindDirection;
  78
  79 #define ZOOM_IN_FACTOR  1.2
  80 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  81
  82 #define SCROLL_TIME 150
  83
  84 /*** Scrolling ***/
  85 static void       ev_view_set_scroll_adjustments             (GtkLayout          *layout,
  86                                                               GtkAdjustment      *hadjustment,
  87                                                               GtkAdjustment      *vadjustment);
  88 static void       view_update_range_and_current_page         (EvView             *view);
  89 static void       set_scroll_adjustment                      (EvView             *view,
  90                                                               GtkOrientation      orientation,
  91                                                               GtkAdjustment      *adjustment);
  92 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
  93                                                               guint               keyval,
  94                                                               GdkModifierType modifiers,
  95                                                               GtkScrollType       scroll,
  96                                                               gboolean            horizontal);
  97 static void       ensure_rectangle_is_visible                (EvView             *view,
  98                                                               GdkRectangle       *rect);
  99
 100 /*** Geometry computations ***/
 101 static void       compute_border                             (EvView             *view,
 102                                                               int                 width,
 103                                                               int                 height,
 104                                                               GtkBorder          *border);
 105 static void       get_page_y_offset                          (EvView             *view,
 106                                                               int                 page,
 107                                                               int                *y_offset);
 108 static gboolean   get_page_extents                           (EvView             *view,
 109                                                               gint                page,
 110                                                               GdkRectangle       *page_area,
 111                                                               GtkBorder          *border);
 112 static void       view_rect_to_doc_rect                      (EvView             *view,
 113                                                               GdkRectangle       *view_rect,
 114                                                               GdkRectangle       *page_area,
 115                                                               EvRectangle        *doc_rect);
 116 static void       doc_rect_to_view_rect                      (EvView             *view,
 117                                                               int                 page,
 118                                                               EvRectangle        *doc_rect,
 119                                                               GdkRectangle       *view_rect);
 120 static gboolean   get_dual_even_left                         (EvView             *view);
 121 static void       find_page_at_location                      (EvView             *view,
 122                                                               gdouble             x,
 123                                                               gdouble             y,
 124                                                               gint               *page,
 125                                                               gint               *x_offset,
 126                                                               gint               *y_offset);
 127 static void       doc_point_to_view_point                    (EvView             *view,
 128                                                               int                 page,
 129                                                               EvPoint            *doc_point,
 130                                                               GdkPoint           *view_point);
 131 /*** Hyperrefs ***/
 132 static EvLink *   ev_view_get_link_at_location               (EvView             *view,
 133                                                               gdouble             x,
 134                                                               gdouble             y);
 135 static char*      tip_from_link                              (EvView             *view,
 136                                                               EvLink             *link);
 137 /*** Forms ***/
 138 static EvFormField *ev_view_get_form_field_at_location       (EvView             *view,
 139                                                                gdouble            x,
 140                                                                gdouble            y);
 141
 142 /*** Annotations ***/
 143 static EvAnnotation *ev_view_get_annotation_at_location      (EvView             *view,
 144                                                               gdouble             x,
 145                                                               gdouble             y);
 146 static void          show_annotation_windows                 (EvView             *view,
 147                                                               gint                page);
 148 static void          hide_annotation_windows                 (EvView             *view,
 149                                                               gint                page);
 150 /*** GtkWidget implementation ***/
 151 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 152                                                               GtkRequisition     *requisition);
 153 static void       ev_view_size_request_continuous            (EvView             *view,
 154                                                               GtkRequisition     *requisition);
 155 static void       ev_view_size_request_dual_page             (EvView             *view,
 156                                                               GtkRequisition     *requisition);
 157 static void       ev_view_size_request_single_page           (EvView             *view,
 158                                                               GtkRequisition     *requisition);
 159 static void       ev_view_size_request                       (GtkWidget          *widget,
 160                                                               GtkRequisition     *requisition);
 161 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 162                                                               GtkAllocation      *allocation);
 163 static void       ev_view_realize                            (GtkWidget          *widget);
 164 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 165                                                               GdkEventScroll     *event);
 166 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 167                                                               GdkEventExpose     *event);
 168 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 169 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 170                                                               GdkEventButton     *event);
 171 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 172                                                               GdkEventMotion     *event);
 173 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 174                                                               GdkEventButton     *event);
 175 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 176                                                               GdkEventCrossing   *event);
 177 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 178                                                               GdkEventCrossing   *event);
 179 static void       ev_view_style_set                          (GtkWidget          *widget,
 180                                                               GtkStyle           *old_style);
 181 static void       ev_view_remove_all                         (EvView             *view);
 182
 183 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 184
 185 /*** Drawing ***/
 186 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 187 static void       draw_rubberband                            (GtkWidget          *widget,
 188                                                               GdkWindow          *window,
 189                                                               const GdkRectangle *rect,
 190                                                               guchar              alpha);
 191 static void       highlight_find_results                     (EvView             *view,
 192                                                               int                 page);
 193 static void       draw_one_page                              (EvView             *view,
 194                                                               gint                page,
 195                                                               cairo_t            *cr,
 196                                                               GdkRectangle       *page_area,
 197                                                               GtkBorder          *border,
 198                                                               GdkRectangle       *expose_area,
 199                                                               gboolean           *page_ready);
 200 static void       draw_loading_text                          (EvView             *view,
 201                                                               GdkRectangle       *page_area,
 202                                                               GdkRectangle       *expose_area);
 203 static void       ev_view_reload_page                        (EvView             *view,
 204                                                               gint                page,
 205                                                               GdkRegion          *region);
 206
 207 /*** Callbacks ***/
 208 static void       ev_view_change_page                        (EvView             *view,
 209                                                               gint                new_page,
 210                                                               gboolean            start_transition);
 211 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 212                                                               GdkRegion          *region,
 213                                                               EvView             *view);
 214 static void       ev_view_page_changed_cb                    (EvDocumentModel    *model,
 215                                                               gint                old_page,
 216                                                               gint                new_page,
 217                                                               EvView             *view);
 218 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 219                                                               EvView             *view);
 220
 221 /*** GObject ***/
 222 static void       ev_view_finalize                           (GObject            *object);
 223 static void       ev_view_destroy                            (GtkObject          *object);
 224 static void       ev_view_set_property                       (GObject            *object,
 225                                                               guint               prop_id,
 226                                                               const GValue       *value,
 227                                                               GParamSpec         *pspec);
 228 static void       ev_view_get_property                       (GObject            *object,
 229                                                               guint               prop_id,
 230                                                               GValue             *value,
 231                                                               GParamSpec         *pspec);
 232 static void       ev_view_class_init                         (EvViewClass        *class);
 233 static void       ev_view_init                               (EvView             *view);
 234
 235 /*** Zoom and sizing ***/
 236 static double   zoom_for_size_fit_width                      (gdouble doc_width,
 237                                                               gdouble doc_height,
 238                                                               int     target_width,
 239                                                               int     target_height);
 240 static double   zoom_for_size_fit_height                     (gdouble doc_width,
 241                                                               gdouble doc_height,
 242                                                               int     target_width,
 243                                                               int     target_height);
 244 static double   zoom_for_size_best_fit                       (gdouble doc_width,
 245                                                               gdouble doc_height,
 246                                                               int     target_width,
 247                                                               int     target_height);
 248 static void     ev_view_zoom_for_size                        (EvView *view,
 249                                                               int     width,
 250                                                               int     height);
 251 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 252                                                               int     width,
 253                                                               int     height);
 254 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 255                                                                 int     width,
 256                                                                 int     height);
 257 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 258                                                                 int     width,
 259                                                                 int     height);
 260 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 261                                                                 int     width,
 262                                                                 int     height);
 263 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height);
 266 /*** Cursors ***/
 267 static GdkCursor* ev_view_create_invisible_cursor            (void);
 268 static void       ev_view_set_cursor                         (EvView             *view,
 269                                                               EvViewCursor        new_cursor);
 270 static void       ev_view_handle_cursor_over_xy              (EvView *view,
 271                                                               gint x,
 272                                                               gint y);
 273
 274 /*** Find ***/
 275 static gint         ev_view_find_get_n_results               (EvView             *view,
 276                                                               gint                page);
 277 static EvRectangle *ev_view_find_get_result                  (EvView             *view,
 278                                                               gint                page,
 279                                                               gint                result);
 280 static void       jump_to_find_result                        (EvView             *view);
 281 static void       jump_to_find_page                          (EvView             *view,
 282                                                               EvViewFindDirection direction,
 283                                                               gint                shift);
 284
 285 /*** Selection ***/
 286 static void       compute_selections                         (EvView             *view,
 287                                                               EvSelectionStyle    style,
 288                                                               GdkPoint           *start,
 289                                                               GdkPoint           *stop);
 290 static void       clear_selection                            (EvView             *view);
 291 static void       clear_link_selected                        (EvView             *view);
 292 static void       selection_free                             (EvViewSelection    *selection);
 293 static char*      get_selected_text                          (EvView             *ev_view);
 294 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 295                                                               GtkSelectionData   *selection_data,
 296                                                               guint               info,
 297                                                               gpointer            data);
 298 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 299                                                               gpointer            data);
 300 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 301
 302 /*** Presentation ***/
 303 static void       ev_view_presentation_transition_start      (EvView             *ev_view);
 304 static void       ev_view_presentation_transition_stop       (EvView             *ev_view);
 305
 306
 307 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_LAYOUT)
 308
 309 /* HeightToPage cache */
 310 #define EV_HEIGHT_TO_PAGE_CACHE_KEY "ev-height-to-page-cache"
 311
 312 static void
 313 build_height_to_page (EvHeightToPageCache *cache,
 314                       EvDocument          *document,
 315                       gint                 rotation)
 316 {
 317         gboolean swap, uniform, dual_even_left;
 318         int i;
 319         double uniform_height, page_height, next_page_height;
 320         double saved_height;
 321         gdouble u_width, u_height;
 322         gint n_pages;
 323
 324         swap = (rotation == 90 || rotation == 270);
 325
 326         uniform = ev_document_is_page_size_uniform (document);
 327         n_pages = ev_document_get_n_pages (document);
 328         dual_even_left = (n_pages > 2);
 329
 330         g_free (cache->height_to_page);
 331         g_free (cache->dual_height_to_page);
 332
 333         cache->rotation = rotation;
 334         cache->height_to_page = g_new0 (gdouble, n_pages + 1);
 335         cache->dual_height_to_page = g_new0 (gdouble, n_pages + 2);
 336
 337         if (uniform)
 338                 ev_document_get_page_size (document, 0, &u_width, &u_height);
 339
 340         saved_height = 0;
 341         for (i = 0; i <= n_pages; i++) {
 342                 if (uniform) {
 343                         uniform_height = swap ? u_width : u_height;
 344                         cache->height_to_page[i] = i * uniform_height;
 345                 } else {
 346                         if (i < n_pages) {
 347                                 gdouble w, h;
 348
 349                                 ev_document_get_page_size (document, i, &w, &h);
 350                                 page_height = swap ? w : h;
 351                         } else {
 352                                 page_height = 0;
 353                         }
 354                         cache->height_to_page[i] = saved_height;
 355                         saved_height += page_height;
 356                 }
 357         }
 358
 359         if (dual_even_left && !uniform) {
 360                 gdouble w, h;
 361
 362                 ev_document_get_page_size (document, 0, &w, &h);
 363                 saved_height = swap ? w : h;
 364         } else {
 365                 saved_height = 0;
 366         }
 367
 368         for (i = dual_even_left; i < n_pages + 2; i += 2) {
 369                 if (uniform) {
 370                         uniform_height = swap ? u_width : u_height;
 371                         cache->dual_height_to_page[i] = ((i + dual_even_left) / 2) * uniform_height;
 372                         if (i + 1 < n_pages + 2)
 373                                 cache->dual_height_to_page[i + 1] = ((i + dual_even_left) / 2) * uniform_height;
 374                 } else {
 375                         if (i + 1 < n_pages) {
 376                                 gdouble w, h;
 377
 378                                 ev_document_get_page_size (document, i + 1, &w, &h);
 379                                 next_page_height = swap ? w : h;
 380                         } else {
 381                                 next_page_height = 0;
 382                         }
 383
 384                         if (i < n_pages) {
 385                                 gdouble w, h;
 386
 387                                 ev_document_get_page_size (document, i, &w, &h);
 388                                 page_height = swap ? w : h;
 389                         } else {
 390                                 page_height = 0;
 391                         }
 392
 393                         if (i + 1 < n_pages + 2) {
 394                                 cache->dual_height_to_page[i] = saved_height;
 395                                 cache->dual_height_to_page[i + 1] = saved_height;
 396                                 saved_height += MAX(page_height, next_page_height);
 397                         } else {
 398                                 cache->dual_height_to_page[i] = saved_height;
 399                         }
 400                 }
 401         }
 402 }
 403
 404 static void
 405 ev_height_to_page_cache_get_height (EvHeightToPageCache *cache,
 406                                     EvDocument          *document,
 407                                     gint                 page,
 408                                     gint                 rotation,
 409                                     gdouble             *height,
 410                                     gdouble             *dual_height)
 411 {
 412         if (cache->rotation != rotation)
 413                 build_height_to_page (cache, document, rotation);
 414
 415         *height = cache->height_to_page[page];
 416         *dual_height = cache->dual_height_to_page[page];
 417 }
 418
 419 static void
 420 ev_height_to_page_cache_free (EvHeightToPageCache *cache)
 421 {
 422         if (cache->height_to_page) {
 423                 g_free (cache->height_to_page);
 424                 cache->height_to_page = NULL;
 425         }
 426
 427         if (cache->dual_height_to_page) {
 428                 g_free (cache->dual_height_to_page);
 429                 cache->dual_height_to_page = NULL;
 430         }
 431         g_free (cache);
 432 }
 433
 434 static EvHeightToPageCache *
 435 ev_view_get_height_to_page_cache (EvView *view)
 436 {
 437         EvHeightToPageCache *cache;
 438
 439         if (!view->document)
 440                 return NULL;
 441
 442         cache = g_object_get_data (G_OBJECT (view->document), EV_HEIGHT_TO_PAGE_CACHE_KEY);
 443         if (!cache) {
 444                 cache = g_new0 (EvHeightToPageCache, 1);
 445                 build_height_to_page (cache, view->document, view->rotation);
 446                 g_object_set_data_full (G_OBJECT (view->document),
 447                                         EV_HEIGHT_TO_PAGE_CACHE_KEY,
 448                                         cache,
 449                                         (GDestroyNotify)ev_height_to_page_cache_free);
 450         }
 451
 452         return cache;
 453 }
 454
 455 static void
 456 ev_view_get_height_to_page (EvView *view,
 457                             gint    page,
 458                             gint   *height,
 459                             gint   *dual_height)
 460 {
 461         gdouble h, dh;
 462
 463         if (!view->height_to_page_cache)
 464                 return;
 465
 466         ev_height_to_page_cache_get_height (view->height_to_page_cache,
 467                                             view->document,
 468                                             page,
 469                                             view->rotation,
 470                                             &h, &dh);
 471         if (height)
 472                 *height = (gint)(h * view->scale + 0.5);
 473
 474         if (dual_height)
 475                 *dual_height = (gint)(dh * view->scale + 0.5);
 476 }
 477
 478 static gint
 479 ev_view_get_scrollbar_size (EvView        *view,
 480                             GtkOrientation orientation)
 481 {
 482         GtkWidget *widget = GTK_WIDGET (view);
 483         GtkWidget *sb;
 484         GtkWidget *swindow = gtk_widget_get_parent (GTK_WIDGET (view));
 485         GtkRequisition req;
 486         gint spacing;
 487
 488         if (!GTK_IS_SCROLLED_WINDOW (swindow))
 489                 return 0;
 490
 491         if (orientation == GTK_ORIENTATION_VERTICAL) {
 492                 if (widget->allocation.height >= widget->requisition.height)
 493                         sb = gtk_scrolled_window_get_vscrollbar (GTK_SCROLLED_WINDOW (swindow));
 494                 else
 495                         return 0;
 496         } else {
 497                 if (widget->allocation.width >= widget->requisition.width)
 498                         sb = gtk_scrolled_window_get_hscrollbar (GTK_SCROLLED_WINDOW (swindow));
 499                 else
 500                         return 0;
 501         }
 502
 503         gtk_widget_style_get (swindow, "scrollbar_spacing", &spacing, NULL);
 504         gtk_widget_size_request (sb, &req);
 505
 506         return (orientation == GTK_ORIENTATION_VERTICAL ? req.width : req.height) + spacing;
 507 }
 508
 509 static void
 510 scroll_to_point (EvView        *view,
 511                  gdouble        x,
 512                  gdouble        y,
 513                  GtkOrientation orientation)
 514 {
 515         if (orientation == GTK_ORIENTATION_VERTICAL) {
 516                 if (view->continuous) {
 517                         gtk_adjustment_clamp_page (view->vadjustment,
 518                                                    y - view->spacing / 2,
 519                                                    y + view->vadjustment->page_size);
 520                 } else {
 521                         gtk_adjustment_set_value (view->vadjustment,
 522                                                   CLAMP (y,
 523                                                   view->vadjustment->lower,
 524                                                   view->vadjustment->upper -
 525                                                   view->vadjustment->page_size));
 526                 }
 527         } else {
 528                 if (view->dual_page) {
 529                         gtk_adjustment_clamp_page (view->hadjustment, x,
 530                                                    x + view->hadjustment->page_size);
 531                 } else {
 532                         gtk_adjustment_set_value (view->hadjustment,
 533                                                   CLAMP (x,
 534                                                   view->hadjustment->lower,
 535                                                   view->hadjustment->upper -
 536                                                   view->hadjustment->page_size));
 537                 }
 538         }
 539 }
 540
 541 static void
 542 ev_view_scroll_to_page_position (EvView *view, GtkOrientation orientation)
 543 {
 544         gdouble x, y;
 545
 546         if (!view->document)
 547                 return;
 548
 549         if ((orientation == GTK_ORIENTATION_VERTICAL && view->pending_point.y == 0) ||
 550             (orientation == GTK_ORIENTATION_HORIZONTAL && view->pending_point.x == 0)) {
 551                 GdkRectangle page_area;
 552                 GtkBorder    border;
 553
 554                 get_page_extents (view, view->current_page, &page_area, &border);
 555                 x = page_area.x;
 556                 y = page_area.y;
 557         } else {
 558                 GdkPoint view_point;
 559
 560                 doc_point_to_view_point (view, view->current_page,
 561                                          &view->pending_point, &view_point);
 562                 x = view_point.x;
 563                 y = view_point.y;
 564         }
 565
 566         scroll_to_point (view, x, y, orientation);
 567 }
 568
 569 static void
 570 view_set_adjustment_values (EvView         *view,
 571                             GtkOrientation  orientation)
 572 {
 573         GtkWidget *widget = GTK_WIDGET (view);
 574         GtkAdjustment *adjustment;
 575         int requisition;
 576         int allocation;
 577
 578         double factor;
 579         gint new_value;
 580
 581         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 582                 requisition = widget->requisition.width;
 583                 allocation = widget->allocation.width;
 584                 adjustment = view->hadjustment;
 585         } else {
 586                 requisition = widget->requisition.height;
 587                 allocation = widget->allocation.height;
 588                 adjustment = view->vadjustment;
 589         }
 590
 591         if (!adjustment)
 592                 return;
 593
 594         factor = 1.0;
 595         switch (view->pending_scroll) {
 596                 case SCROLL_TO_KEEP_POSITION:
 597                 case SCROLL_TO_FIND_LOCATION:
 598                         factor = (adjustment->value) / adjustment->upper;
 599                         break;
 600                 case SCROLL_TO_PAGE_POSITION:
 601                         break;
 602                 case SCROLL_TO_CENTER:
 603                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 604                         break;
 605         }
 606
 607         adjustment->page_size = allocation;
 608         adjustment->step_increment = allocation * 0.1;
 609         adjustment->page_increment = allocation * 0.9;
 610         adjustment->lower = 0;
 611         adjustment->upper = MAX (allocation, requisition);
 612
 613         /*
 614          * We add 0.5 to the values before to average out our rounding errors.
 615          */
 616         switch (view->pending_scroll) {
 617                 case SCROLL_TO_KEEP_POSITION:
 618                 case SCROLL_TO_FIND_LOCATION:
 619                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 620                         gtk_adjustment_set_value (adjustment, (int)new_value);
 621                         break;
 622                 case SCROLL_TO_PAGE_POSITION:
 623                         ev_view_scroll_to_page_position (view, orientation);
 624                         break;
 625                 case SCROLL_TO_CENTER:
 626                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 627                                            0, adjustment->upper - adjustment->page_size);
 628                         gtk_adjustment_set_value (adjustment, (int)new_value);
 629                         break;
 630         }
 631
 632         gtk_adjustment_changed (adjustment);
 633 }
 634
 635 static void
 636 view_update_range_and_current_page (EvView *view)
 637 {
 638         gint start = view->start_page;
 639         gint end = view->end_page;
 640
 641         if (ev_document_get_n_pages (view->document) <= 0 ||
 642             !ev_document_check_dimensions (view->document))
 643                 return;
 644
 645         /* Presentation trumps all other modes */
 646         if (view->presentation) {
 647                 view->start_page = view->current_page;
 648                 view->end_page = view->current_page;
 649         } else if (view->continuous) {
 650                 GdkRectangle current_area, unused, page_area;
 651                 GtkBorder border;
 652                 gboolean found = FALSE;
 653                 gint area_max = -1, area;
 654                 gint best_current_page = -1;
 655                 int i, j = 0;
 656
 657                 if (!(view->vadjustment && view->hadjustment))
 658                         return;
 659
 660                 current_area.x = view->hadjustment->value;
 661                 current_area.width = view->hadjustment->page_size;
 662                 current_area.y = view->vadjustment->value;
 663                 current_area.height = view->vadjustment->page_size;
 664
 665                 for (i = 0; i < ev_document_get_n_pages (view->document); i++) {
 666
 667                         get_page_extents (view, i, &page_area, &border);
 668
 669                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 670                                 area = unused.width * unused.height;
 671
 672                                 if (!found) {
 673                                         area_max = area;
 674                                         view->start_page = i;
 675                                         found = TRUE;
 676                                         best_current_page = i;
 677                                 }
 678                                 if (area > area_max) {
 679                                         best_current_page = (area == area_max) ? MIN (i, best_current_page) : i;
 680                                         area_max = area;
 681                                 }
 682
 683                                 view->end_page = i;
 684                                 j = 0;
 685                         } else if (found && view->current_page <= view->end_page) {
 686                                 if (view->dual_page && j < 1) {
 687                                         /* In dual mode  we stop searching
 688                                          * after two consecutive non-visible pages.
 689                                          */
 690                                         j++;
 691                                         continue;
 692                                 }
 693                                 break;
 694                         }
 695                 }
 696
 697                 if (view->pending_scroll == SCROLL_TO_KEEP_POSITION) {
 698                         best_current_page = MAX (best_current_page, view->start_page);
 699
 700                         if (view->current_page != best_current_page) {
 701                                 view->current_page = best_current_page;
 702                                 ev_document_model_set_page (view->model, best_current_page);
 703                         }
 704                 }
 705         } else if (view->dual_page) {
 706                 if (view->current_page % 2 == get_dual_even_left (view)) {
 707                         view->start_page = view->current_page;
 708                         if (view->current_page + 1 < ev_document_get_n_pages (view->document))
 709                                 view->end_page = view->start_page + 1;
 710                         else
 711                                 view->end_page = view->start_page;
 712                 } else {
 713                         if (view->current_page < 1)
 714                                 view->start_page = view->current_page;
 715                         else
 716                                 view->start_page = view->current_page - 1;
 717                         view->end_page = view->current_page;
 718                 }
 719         } else {
 720                 view->start_page = view->current_page;
 721                 view->end_page = view->current_page;
 722         }
 723
 724         if (start != view->start_page || end != view->end_page) {
 725                 gint i;
 726
 727                 for (i = start; i < view->start_page && start != -1; i++) {
 728                         hide_annotation_windows (view, i);
 729                 }
 730
 731                 for (i = end; i > view->end_page && end != -1; i--) {
 732                         hide_annotation_windows (view, i);
 733                 }
 734         }
 735
 736         ev_page_cache_set_page_range (view->page_cache,
 737                                       view->start_page,
 738                                       view->end_page);
 739         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 740                                         view->start_page,
 741                                         view->end_page,
 742                                         view->rotation,
 743                                         view->scale,
 744                                         view->selection_info.selections);
 745
 746         if (ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page))
 747             gtk_widget_queue_draw (GTK_WIDGET (view));
 748 }
 749
 750 static void
 751 set_scroll_adjustment (EvView *view,
 752                        GtkOrientation  orientation,
 753                        GtkAdjustment  *adjustment)
 754 {
 755         GtkAdjustment **to_set;
 756
 757         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 758                 to_set = &view->hadjustment;
 759         else
 760                 to_set = &view->vadjustment;
 761
 762         if (*to_set != adjustment) {
 763                 if (*to_set) {
 764                         g_signal_handlers_disconnect_by_func (*to_set,
 765                                                               (gpointer) on_adjustment_value_changed,
 766                                                               view);
 767                         g_object_unref (*to_set);
 768                 }
 769
 770                 *to_set = adjustment;
 771                 view_set_adjustment_values (view, orientation);
 772
 773                 if (*to_set) {
 774                         g_object_ref (*to_set);
 775                         g_signal_connect (*to_set, "value_changed",
 776                                           G_CALLBACK (on_adjustment_value_changed), view);
 777                 }
 778         }
 779 }
 780
 781 static void
 782 ev_view_set_scroll_adjustments (GtkLayout      *layout,
 783                                 GtkAdjustment  *hadjustment,
 784                                 GtkAdjustment  *vadjustment)
 785 {
 786         EvView *view = EV_VIEW (layout);
 787
 788         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 789         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 790
 791         on_adjustment_value_changed (NULL, view);
 792 }
 793
 794 static void
 795 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 796                            guint           keyval,
 797                            GdkModifierType modifiers,
 798                            GtkScrollType   scroll,
 799                            gboolean        horizontal)
 800 {
 801   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 802
 803   gtk_binding_entry_add_signal (binding_set, keyval, modifiers,
 804                                 "binding_activated", 2,
 805                                 GTK_TYPE_SCROLL_TYPE, scroll,
 806                                 G_TYPE_BOOLEAN, horizontal);
 807   gtk_binding_entry_add_signal (binding_set, keypad_keyval, modifiers,
 808                                 "binding_activated", 2,
 809                                 GTK_TYPE_SCROLL_TYPE, scroll,
 810                                 G_TYPE_BOOLEAN, horizontal);
 811 }
 812
 813 static gdouble
 814 compute_scroll_increment (EvView        *view,
 815                           GtkScrollType  scroll)
 816 {
 817         GtkWidget *widget = GTK_WIDGET (view);
 818         GtkAdjustment *adjustment = view->vadjustment;
 819         GdkRegion *text_region, *region;
 820         gint page;
 821         GdkRectangle rect;
 822         EvRectangle doc_rect;
 823         GdkRectangle page_area;
 824         GtkBorder border;
 825         GdkRectangle *recs;
 826         gint n_recs;
 827         gdouble fraction = 1.0;
 828
 829         if (scroll != GTK_SCROLL_PAGE_BACKWARD && scroll != GTK_SCROLL_PAGE_FORWARD)
 830                 return adjustment->page_size;
 831
 832         page = scroll == GTK_SCROLL_PAGE_BACKWARD ? view->start_page : view->end_page;
 833
 834         text_region = ev_page_cache_get_text_mapping (view->page_cache, page);
 835         if (!text_region || gdk_region_empty (text_region))
 836                 return adjustment->page_size;
 837
 838         get_page_extents (view, page, &page_area, &border);
 839         rect.x = page_area.x + view->scroll_x;
 840         rect.y = view->scroll_y + (scroll == GTK_SCROLL_PAGE_BACKWARD ? 5 : widget->allocation.height - 5);
 841         rect.width = page_area.width;
 842         rect.height = 1;
 843         view_rect_to_doc_rect (view, &rect, &page_area, &doc_rect);
 844
 845         /* Convert the doc rectangle into a GdkRectangle */
 846         rect.x = doc_rect.x1;
 847         rect.y = doc_rect.y1;
 848         rect.width = doc_rect.x2 - doc_rect.x1;
 849         rect.height = MAX (1, doc_rect.y2 - doc_rect.y1);
 850         region = gdk_region_rectangle (&rect);
 851
 852         gdk_region_intersect (region, text_region);
 853         gdk_region_get_rectangles (region, &recs, &n_recs);
 854         gdk_region_destroy (region);
 855         if (n_recs > 0) {
 856                 EvRenderContext *rc;
 857                 EvPage  *ev_page;
 858
 859                 ev_page = ev_document_get_page (view->document, page);
 860                 rc = ev_render_context_new (ev_page, view->rotation, view->scale);
 861                 g_object_unref (ev_page);
 862                 /* Get the selection region to know the height of the line */
 863                 doc_rect.x1 = doc_rect.x2 = recs[0].x + 0.5;
 864                 doc_rect.y1 = doc_rect.y2 = recs[0].y + 0.5;
 865
 866                 ev_document_doc_mutex_lock ();
 867                 region = ev_selection_get_selection_region (EV_SELECTION (view->document),
 868                                                             rc, EV_SELECTION_STYLE_LINE,
 869                                                             &doc_rect);
 870                 ev_document_doc_mutex_unlock ();
 871
 872                 g_object_unref (rc);
 873                 g_free (recs);
 874                 gdk_region_get_rectangles (region, &recs, &n_recs);
 875                 gdk_region_destroy (region);
 876                 if (n_recs > 0) {
 877                         fraction = 1 - (recs[0].height / adjustment->page_size);
 878                 }
 879                 g_free (recs);
 880         }
 881
 882         return adjustment->page_size * fraction;
 883
 884 }
 885
 886 void
 887 ev_view_scroll (EvView        *view,
 888                 GtkScrollType  scroll,
 889                 gboolean       horizontal)
 890 {
 891         GtkAdjustment *adjustment;
 892         double value, increment;
 893         gboolean first_page = FALSE;
 894         gboolean last_page = FALSE;
 895
 896         view->jump_to_find_result = FALSE;
 897
 898         if (view->presentation || view->sizing_mode == EV_SIZING_BEST_FIT) {
 899                 switch (scroll) {
 900                         case GTK_SCROLL_PAGE_BACKWARD:
 901                         case GTK_SCROLL_STEP_BACKWARD:
 902                                 ev_view_previous_page (view);
 903                                 break;
 904                         case GTK_SCROLL_PAGE_FORWARD:
 905                         case GTK_SCROLL_STEP_FORWARD:
 906                                 ev_view_next_page (view);
 907                                 break;
 908                         default:
 909                                 break;
 910                 }
 911                 return;
 912         }
 913
 914         /* Assign values for increment and vertical adjustment */
 915         adjustment = horizontal ? view->hadjustment : view->vadjustment;
 916         value = adjustment->value;
 917
 918         /* Assign boolean for first and last page */
 919         if (view->current_page == 0)
 920                 first_page = TRUE;
 921         if (view->current_page == ev_document_get_n_pages (view->document) - 1)
 922                 last_page = TRUE;
 923
 924         switch (scroll) {
 925                 case GTK_SCROLL_PAGE_BACKWARD:
 926                         /* Do not jump backwards if at the first page */
 927                         if (value == (adjustment->lower) && first_page) {
 928                                 /* Do nothing */
 929                                 /* At the top of a page, assign the upper bound limit of previous page */
 930                         } else if (value == (adjustment->lower)) {
 931                                 value = adjustment->upper - adjustment->page_size;
 932                                 ev_view_previous_page (view);
 933                                 /* Jump to the top */
 934                         } else {
 935                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_BACKWARD);
 936                                 value = MAX (value - increment, adjustment->lower);
 937                         }
 938                         break;
 939                 case GTK_SCROLL_PAGE_FORWARD:
 940                         /* Do not jump forward if at the last page */
 941                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 942                                 /* Do nothing */
 943                         /* At the bottom of a page, assign the lower bound limit of next page */
 944                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 945                                 value = 0;
 946                                 ev_view_next_page (view);
 947                         /* Jump to the bottom */
 948                         } else {
 949                                 increment = compute_scroll_increment (view, GTK_SCROLL_PAGE_FORWARD);
 950                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 951                         }
 952                         break;
 953                 case GTK_SCROLL_STEP_BACKWARD:
 954                         value -= adjustment->step_increment;
 955                         break;
 956                 case GTK_SCROLL_STEP_FORWARD:
 957                         value += adjustment->step_increment;
 958                         break;
 959                 case GTK_SCROLL_STEP_DOWN:
 960                         value -= adjustment->step_increment / 10;
 961                         break;
 962                 case GTK_SCROLL_STEP_UP:
 963                         value += adjustment->step_increment / 10;
 964                         break;
 965                 default:
 966                         break;
 967         }
 968
 969         value = CLAMP (value, adjustment->lower,
 970                        adjustment->upper - adjustment->page_size);
 971
 972         gtk_adjustment_set_value (adjustment, value);
 973 }
 974
 975 #define MARGIN 5
 976
 977 static void
 978 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 979 {
 980         GtkWidget *widget = GTK_WIDGET (view);
 981         GtkAdjustment *adjustment;
 982         int value;
 983
 984         view->pending_scroll = SCROLL_TO_FIND_LOCATION;
 985
 986         adjustment = view->vadjustment;
 987
 988         if (rect->y < adjustment->value) {
 989                 value = MAX (adjustment->lower, rect->y - MARGIN);
 990                 gtk_adjustment_set_value (view->vadjustment, value);
 991         } else if (rect->y + rect->height >
 992                    adjustment->value + widget->allocation.height) {
 993                 value = MIN (adjustment->upper, rect->y + rect->height -
 994                              widget->allocation.height + MARGIN);
 995                 gtk_adjustment_set_value (view->vadjustment, value);
 996         }
 997
 998         adjustment = view->hadjustment;
 999
1000         if (rect->x < adjustment->value) {
1001                 value = MAX (adjustment->lower, rect->x - MARGIN);
1002                 gtk_adjustment_set_value (view->hadjustment, value);
1003         } else if (rect->x + rect->height >
1004                    adjustment->value + widget->allocation.width) {
1005                 value = MIN (adjustment->upper, rect->x + rect->width -
1006                              widget->allocation.width + MARGIN);
1007                 gtk_adjustment_set_value (view->hadjustment, value);
1008         }
1009
1010         gtk_widget_queue_resize (GTK_WIDGET (view));
1011 }
1012
1013 /*** Geometry computations ***/
1014
1015 static void
1016 compute_border (EvView *view, int width, int height, GtkBorder *border)
1017 {
1018         if (view->presentation) {
1019                 border->left = 0;
1020                 border->right = 0;
1021                 border->top = 0;
1022                 border->bottom = 0;
1023         } else {
1024                 ev_document_misc_get_page_border_size (width, height, border);
1025         }
1026 }
1027
1028 void
1029 _get_page_size_for_scale_and_rotation (EvDocument *document,
1030                                        gint        page,
1031                                        gdouble     scale,
1032                                        gint        rotation,
1033                                        gint       *page_width,
1034                                        gint       *page_height)
1035 {
1036         gdouble w, h;
1037         gint    width, height;
1038
1039         ev_document_get_page_size (document, page, &w, &h);
1040
1041         width = (gint)(w * scale + 0.5);
1042         height = (gint)(h * scale + 0.5);
1043
1044         if (page_width)
1045                 *page_width = (rotation == 0 || rotation == 180) ? width : height;
1046         if (page_height)
1047                 *page_height = (rotation == 0 || rotation == 180) ? height : width;
1048 }
1049
1050 static void
1051 ev_view_get_page_size (EvView *view,
1052                        gint    page,
1053                        gint   *page_width,
1054                        gint   *page_height)
1055 {
1056         _get_page_size_for_scale_and_rotation (view->document,
1057                                                page,
1058                                                view->scale,
1059                                                view->rotation,
1060                                                page_width,
1061                                                page_height);
1062 }
1063
1064 static void
1065 ev_view_get_max_page_size (EvView *view,
1066                            gint   *max_width,
1067                            gint   *max_height)
1068 {
1069         double w, h;
1070         gint   width, height;
1071
1072         ev_document_get_max_page_size (view->document, &w, &h);
1073
1074         width = (gint)(w * view->scale + 0.5);
1075         height = (gint)(h * view->scale + 0.5);
1076
1077         if (max_width)
1078                 *max_width = (view->rotation == 0 || view->rotation == 180) ? width : height;
1079         if (max_height)
1080                 *max_height = (view->rotation == 0 || view->rotation == 180) ? height : width;
1081 }
1082
1083 static void
1084 get_page_y_offset (EvView *view, int page, int *y_offset)
1085 {
1086         int max_width, offset;
1087         GtkBorder border;
1088
1089         g_return_if_fail (y_offset != NULL);
1090
1091         ev_view_get_max_page_size (view, &max_width, NULL);
1092         compute_border (view, max_width, max_width, &border);
1093
1094         if (view->dual_page) {
1095                 ev_view_get_height_to_page (view, page, NULL, &offset);
1096                 offset += ((page + get_dual_even_left (view)) / 2 + 1) * view->spacing +
1097                         ((page + get_dual_even_left (view)) / 2 ) * (border.top + border.bottom);
1098         } else {
1099                 ev_view_get_height_to_page (view, page, &offset, NULL);
1100                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
1101         }
1102
1103         *y_offset = offset;
1104         return;
1105 }
1106
1107 static gboolean
1108 get_page_extents (EvView       *view,
1109                   gint          page,
1110                   GdkRectangle *page_area,
1111                   GtkBorder    *border)
1112 {
1113         GtkWidget *widget;
1114         int width, height;
1115
1116         widget = GTK_WIDGET (view);
1117
1118         /* Get the size of the page */
1119         ev_view_get_page_size (view, page, &width, &height);
1120         compute_border (view, width, height, border);
1121         page_area->width = width + border->left + border->right;
1122         page_area->height = height + border->top + border->bottom;
1123
1124         if (view->presentation) {
1125                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
1126                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
1127         } else if (view->continuous) {
1128                 gint max_width;
1129                 gint x, y;
1130
1131                 ev_view_get_max_page_size (view, &max_width, NULL);
1132                 max_width = max_width + border->left + border->right;
1133                 /* Get the location of the bounding box */
1134                 if (view->dual_page) {
1135                         x = view->spacing + ((page % 2 == get_dual_even_left (view)) ? 0 : 1) * (max_width + view->spacing);
1136                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
1137                         if (page % 2 == get_dual_even_left (view))
1138                                 x = x + (max_width - width - border->left - border->right);
1139                 } else {
1140                         x = view->spacing;
1141                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
1142                 }
1143
1144                 get_page_y_offset (view, page, &y);
1145
1146                 page_area->x = x;
1147                 page_area->y = y;
1148         } else {
1149                 gint x, y;
1150                 if (view->dual_page) {
1151                         gint width_2, height_2;
1152                         gint max_width = width;
1153                         gint max_height = height;
1154                         GtkBorder overall_border;
1155                         gint other_page;
1156
1157                         other_page = (page % 2 == get_dual_even_left (view)) ? page + 1: page - 1;
1158
1159                         /* First, we get the bounding box of the two pages */
1160                         if (other_page < ev_document_get_n_pages (view->document)
1161                             && (0 <= other_page)) {
1162                                 ev_view_get_page_size (view, other_page,
1163                                                        &width_2, &height_2);
1164                                 if (width_2 > width)
1165                                         max_width = width_2;
1166                                 if (height_2 > height)
1167                                         max_height = height_2;
1168                         }
1169                         compute_border (view, max_width, max_height, &overall_border);
1170
1171                         /* Find the offsets */
1172                         x = view->spacing;
1173                         y = view->spacing;
1174
1175                         /* Adjust for being the left or right page */
1176                         if (page % 2 == get_dual_even_left (view))
1177                                 x = x + max_width - width;
1178                         else
1179                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
1180
1181                         y = y + (max_height - height)/2;
1182
1183                         /* Adjust for extra allocation */
1184                         x = x + MAX (0, widget->allocation.width -
1185                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
1186                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
1187                 } else {
1188                         x = view->spacing;
1189                         y = view->spacing;
1190
1191                         /* Adjust for extra allocation */
1192                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
1193                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
1194                 }
1195
1196                 page_area->x = x;
1197                 page_area->y = y;
1198         }
1199
1200         return TRUE;
1201 }
1202
1203 static void
1204 get_doc_page_size (EvView  *view,
1205                    gint     page,
1206                    gdouble *width,
1207                    gdouble *height)
1208 {
1209         double w, h;
1210
1211         ev_document_get_page_size (view->document, page, &w, &h);
1212         if (view->rotation == 0 || view->rotation == 180) {
1213                 if (width) *width = w;
1214                 if (height) *height = h;
1215         } else {
1216                 if (width) *width = h;
1217                 if (height) *height = w;
1218         }
1219 }
1220
1221 static void
1222 view_point_to_doc_point (EvView *view,
1223                          GdkPoint *view_point,
1224                          GdkRectangle *page_area,
1225                          double  *doc_point_x,
1226                          double  *doc_point_y)
1227 {
1228         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
1229         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
1230 }
1231
1232 static void
1233 view_rect_to_doc_rect (EvView *view,
1234                        GdkRectangle *view_rect,
1235                        GdkRectangle *page_area,
1236                        EvRectangle  *doc_rect)
1237 {
1238         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
1239         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
1240         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
1241         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
1242 }
1243
1244 static void
1245 doc_point_to_view_point (EvView       *view,
1246                          int           page,
1247                          EvPoint      *doc_point,
1248                          GdkPoint     *view_point)
1249 {
1250         GdkRectangle page_area;
1251         GtkBorder border;
1252         double x, y, view_x, view_y;
1253         gdouble width, height;
1254
1255         get_doc_page_size (view, page, &width, &height);
1256
1257         if (view->rotation == 0) {
1258                 x = doc_point->x;
1259                 y = doc_point->y;
1260         } else if (view->rotation == 90) {
1261                 x = width - doc_point->y;
1262                 y = doc_point->x;
1263         } else if (view->rotation == 180) {
1264                 x = width - doc_point->x;
1265                 y = height - doc_point->y;
1266         } else if (view->rotation == 270) {
1267                 x = doc_point->y;
1268                 y = height - doc_point->x;
1269         } else {
1270                 g_assert_not_reached ();
1271         }
1272
1273         get_page_extents (view, page, &page_area, &border);
1274
1275         view_x = CLAMP (x * view->scale, 0, page_area.width);
1276         view_y = CLAMP (y * view->scale, 0, page_area.height);
1277         view_point->x = view_x + page_area.x;
1278         view_point->y = view_y + page_area.y;
1279 }
1280
1281 static void
1282 doc_rect_to_view_rect (EvView       *view,
1283                        int           page,
1284                        EvRectangle  *doc_rect,
1285                        GdkRectangle *view_rect)
1286 {
1287         GdkRectangle page_area;
1288         GtkBorder border;
1289         double x, y, w, h;
1290         gdouble width, height;
1291
1292         get_doc_page_size (view, page, &width, &height);
1293
1294         if (view->rotation == 0) {
1295                 x = doc_rect->x1;
1296                 y = doc_rect->y1;
1297                 w = doc_rect->x2 - doc_rect->x1;
1298                 h = doc_rect->y2 - doc_rect->y1;
1299         } else if (view->rotation == 90) {
1300                 x = width - doc_rect->y2;
1301                 y = doc_rect->x1;
1302                 w = doc_rect->y2 - doc_rect->y1;
1303                 h = doc_rect->x2 - doc_rect->x1;
1304         } else if (view->rotation == 180) {
1305                 x = width - doc_rect->x2;
1306                 y = height - doc_rect->y2;
1307                 w = doc_rect->x2 - doc_rect->x1;
1308                 h = doc_rect->y2 - doc_rect->y1;
1309         } else if (view->rotation == 270) {
1310                 x = doc_rect->y1;
1311                 y = height - doc_rect->x2;
1312                 w = doc_rect->y2 - doc_rect->y1;
1313                 h = doc_rect->x2 - doc_rect->x1;
1314         } else {
1315                 g_assert_not_reached ();
1316         }
1317
1318         get_page_extents (view, page, &page_area, &border);
1319
1320         view_rect->x = x * view->scale + page_area.x;
1321         view_rect->y = y * view->scale + page_area.y;
1322         view_rect->width = w * view->scale;
1323         view_rect->height = h * view->scale;
1324 }
1325
1326 static gboolean
1327 get_dual_even_left (EvView *view)
1328 {
1329         return (ev_document_get_n_pages (view->document) > 2);
1330 }
1331
1332 static void
1333 find_page_at_location (EvView  *view,
1334                        gdouble  x,
1335                        gdouble  y,
1336                        gint    *page,
1337                        gint    *x_offset,
1338                        gint    *y_offset)
1339 {
1340         int i;
1341
1342         if (view->document == NULL)
1343                 return;
1344
1345         g_assert (page);
1346         g_assert (x_offset);
1347         g_assert (y_offset);
1348
1349         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
1350                 GdkRectangle page_area;
1351                 GtkBorder border;
1352
1353                 if (! get_page_extents (view, i, &page_area, &border))
1354                         continue;
1355
1356                 if ((x >= page_area.x + border.left) &&
1357                     (x < page_area.x + page_area.width - border.right) &&
1358                     (y >= page_area.y + border.top) &&
1359                     (y < page_area.y + page_area.height - border.bottom)) {
1360                         *page = i;
1361                         *x_offset = x - (page_area.x + border.left);
1362                         *y_offset = y - (page_area.y + border.top);
1363                         return;
1364                 }
1365         }
1366
1367         *page = -1;
1368 }
1369
1370 static gboolean
1371 location_in_text (EvView  *view,
1372                   gdouble  x,
1373                   gdouble  y)
1374 {
1375         GdkRegion *region;
1376         gint page = -1;
1377         gint x_offset = 0, y_offset = 0;
1378
1379         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1380
1381         if (page == -1)
1382                 return FALSE;
1383
1384         region = ev_page_cache_get_text_mapping (view->page_cache, page);
1385
1386         if (region)
1387                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1388         else
1389                 return FALSE;
1390 }
1391
1392 static int
1393 ev_view_get_width (EvView *view)
1394 {
1395         return GTK_WIDGET (view)->allocation.width;
1396 }
1397
1398 static int
1399 ev_view_get_height (EvView *view)
1400 {
1401         return GTK_WIDGET (view)->allocation.height;
1402 }
1403
1404 static gboolean
1405 location_in_selected_text (EvView  *view,
1406                            gdouble  x,
1407                            gdouble  y)
1408 {
1409         gint page = -1;
1410         gint x_offset = 0, y_offset = 0;
1411         EvViewSelection *selection;
1412         GList *l = NULL;
1413
1414         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1415                 selection = (EvViewSelection *)l->data;
1416
1417                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1418
1419                 if (page != selection->page)
1420                         continue;
1421
1422                 if (selection->covered_region &&
1423                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1424                         return TRUE;
1425         }
1426
1427         return FALSE;
1428 }
1429
1430 static gboolean
1431 get_doc_point_from_offset (EvView *view,
1432                            gint    page,
1433                            gint    x_offset,
1434                            gint    y_offset,
1435                            gint   *x_new,
1436                            gint   *y_new)
1437 {
1438         gdouble width, height;
1439         double x, y;
1440
1441         get_doc_page_size (view, page, &width, &height);
1442
1443         x_offset = x_offset / view->scale;
1444         y_offset = y_offset / view->scale;
1445
1446         if (view->rotation == 0) {
1447                 x = x_offset;
1448                 y = y_offset;
1449         } else if (view->rotation == 90) {
1450                 x = y_offset;
1451                 y = width - x_offset;
1452         } else if (view->rotation == 180) {
1453                 x = width - x_offset;
1454                 y = height - y_offset;
1455         } else if (view->rotation == 270) {
1456                 x = height - y_offset;
1457                 y = x_offset;
1458         } else {
1459                 g_assert_not_reached ();
1460         }
1461
1462         *x_new = x;
1463         *y_new = y;
1464
1465         return TRUE;
1466 }
1467
1468 static gboolean
1469 get_doc_point_from_location (EvView  *view,
1470                              gdouble  x,
1471                              gdouble  y,
1472                              gint    *page,
1473                              gint    *x_new,
1474                              gint    *y_new)
1475 {
1476         gint x_offset = 0, y_offset = 0;
1477
1478         x += view->scroll_x;
1479         y += view->scroll_y;
1480         find_page_at_location (view, x, y, page, &x_offset, &y_offset);
1481         if (*page == -1)
1482                 return FALSE;
1483
1484         return get_doc_point_from_offset (view, *page, x_offset, y_offset, x_new, y_new);
1485 }
1486
1487 static void
1488 ev_view_get_area_from_mapping (EvView       *view,
1489                                guint         page,
1490                                GList        *mapping_list,
1491                                gconstpointer data,
1492                                GdkRectangle *area)
1493 {
1494         EvMapping *mapping;
1495
1496         mapping = ev_mapping_list_find (mapping_list, data);
1497         doc_rect_to_view_rect (view, page, &mapping->area, area);
1498         area->x -= view->scroll_x;
1499         area->y -= view->scroll_y;
1500 }
1501
1502
1503 /*** Hyperref ***/
1504 static EvLink *
1505 ev_view_get_link_at_location (EvView  *view,
1506                               gdouble  x,
1507                               gdouble  y)
1508 {
1509         gint page = -1;
1510         gint x_new = 0, y_new = 0;
1511         GList *link_mapping;
1512
1513         if (!EV_IS_DOCUMENT_LINKS (view->document))
1514                 return NULL;
1515
1516         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1517                 return NULL;
1518
1519         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
1520
1521         if (link_mapping)
1522                 return ev_mapping_list_get_data (link_mapping, x_new, y_new);
1523         else
1524                 return NULL;
1525 }
1526
1527 static void
1528 goto_fitr_dest (EvView *view, EvLinkDest *dest)
1529 {
1530         EvPoint doc_point;
1531         gdouble zoom, left, top;
1532         gboolean change_left, change_top;
1533
1534         left = ev_link_dest_get_left (dest, &change_left);
1535         top = ev_link_dest_get_top (dest, &change_top);
1536
1537         zoom = zoom_for_size_best_fit (ev_link_dest_get_right (dest) - left,
1538                                        ev_link_dest_get_bottom (dest) - top,
1539                                        ev_view_get_width (view),
1540                                        ev_view_get_height (view));
1541
1542         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1543         ev_document_model_set_scale (view->model, zoom);
1544
1545         doc_point.x = change_left ? left : 0;
1546         doc_point.y = change_top ? top : 0;
1547         view->pending_point = doc_point;
1548
1549         ev_view_change_page (view, ev_link_dest_get_page (dest), TRUE);
1550 }
1551
1552 static void
1553 goto_fitv_dest (EvView *view, EvLinkDest *dest)
1554 {
1555         EvPoint doc_point;
1556         gdouble doc_width, doc_height;
1557         gint page;
1558         double zoom, left;
1559         gboolean change_left;
1560
1561         page = ev_link_dest_get_page (dest);
1562         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1563
1564         left = ev_link_dest_get_left (dest, &change_left);
1565         doc_point.x = change_left ? left : 0;
1566         doc_point.y = 0;
1567
1568         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1569                                          ev_view_get_width (view),
1570                                          ev_view_get_height (view));
1571
1572         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1573         ev_document_model_set_scale (view->model, zoom);
1574
1575         view->pending_point = doc_point;
1576
1577         ev_view_change_page (view, page, TRUE);
1578 }
1579
1580 static void
1581 goto_fith_dest (EvView *view, EvLinkDest *dest)
1582 {
1583         EvPoint doc_point;
1584         gdouble doc_width, doc_height;
1585         gint page;
1586         gdouble zoom, top;
1587         gboolean change_top;
1588
1589         page = ev_link_dest_get_page (dest);
1590         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1591
1592         top = ev_link_dest_get_top (dest, &change_top);
1593
1594         doc_point.x = 0;
1595         doc_point.y = change_top ? top : 0;
1596
1597         zoom = zoom_for_size_fit_width (doc_width, top,
1598                                         ev_view_get_width (view),
1599                                         ev_view_get_height (view));
1600
1601         ev_document_model_set_sizing_mode (view->model, EV_SIZING_FIT_WIDTH);
1602         ev_document_model_set_scale (view->model, zoom);
1603
1604         view->pending_point = doc_point;
1605
1606         ev_view_change_page (view, page, TRUE);
1607 }
1608
1609 static void
1610 goto_fit_dest (EvView *view, EvLinkDest *dest)
1611 {
1612         double zoom;
1613         gdouble doc_width, doc_height;
1614         int page;
1615
1616         page = ev_link_dest_get_page (dest);
1617         ev_document_get_page_size (view->document, page, &doc_width, &doc_height);
1618
1619         zoom = zoom_for_size_best_fit (doc_width, doc_height,
1620                                        ev_view_get_width (view),
1621                                        ev_view_get_height (view));
1622
1623         ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
1624         ev_document_model_set_scale (view->model, zoom);
1625
1626         ev_view_change_page (view, page, TRUE);
1627 }
1628
1629 static void
1630 goto_xyz_dest (EvView *view, EvLinkDest *dest)
1631 {
1632         EvPoint doc_point;
1633         gint page;
1634         gdouble zoom, left, top;
1635         gboolean change_zoom, change_left, change_top;
1636
1637         zoom = ev_link_dest_get_zoom (dest, &change_zoom);
1638         page = ev_link_dest_get_page (dest);
1639
1640         if (change_zoom && zoom > 1) {
1641                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
1642                 ev_document_model_set_scale (view->model, zoom);
1643         }
1644
1645         left = ev_link_dest_get_left (dest, &change_left);
1646         top = ev_link_dest_get_top (dest, &change_top);
1647
1648         doc_point.x = change_left ? left : 0;
1649         doc_point.y = change_top ? top : 0;
1650         view->pending_point = doc_point;
1651
1652         ev_view_change_page (view, page, TRUE);
1653 }
1654
1655 static void
1656 goto_dest (EvView *view, EvLinkDest *dest)
1657 {
1658         EvLinkDestType type;
1659         int page, n_pages, current_page;
1660
1661         page = ev_link_dest_get_page (dest);
1662         n_pages = ev_document_get_n_pages (view->document);
1663
1664         if (page < 0 || page >= n_pages)
1665                 return;
1666
1667         current_page = view->current_page;
1668
1669         type = ev_link_dest_get_dest_type (dest);
1670
1671         switch (type) {
1672                 case EV_LINK_DEST_TYPE_PAGE:
1673                         ev_document_model_set_page (view->model, page);
1674                         break;
1675                 case EV_LINK_DEST_TYPE_FIT:
1676                         goto_fit_dest (view, dest);
1677                         break;
1678                 case EV_LINK_DEST_TYPE_FITH:
1679                         goto_fith_dest (view, dest);
1680                         break;
1681                 case EV_LINK_DEST_TYPE_FITV:
1682                         goto_fitv_dest (view, dest);
1683                         break;
1684                 case EV_LINK_DEST_TYPE_FITR:
1685                         goto_fitr_dest (view, dest);
1686                         break;
1687                 case EV_LINK_DEST_TYPE_XYZ:
1688                         goto_xyz_dest (view, dest);
1689                         break;
1690                 case EV_LINK_DEST_TYPE_PAGE_LABEL:
1691                         ev_document_model_set_page_by_label (view->model, ev_link_dest_get_page_label (dest));
1692                         break;
1693                 default:
1694                         g_assert_not_reached ();
1695         }
1696
1697         if (current_page != view->current_page)
1698                 ev_document_model_set_page (view->model, view->current_page);
1699 }
1700
1701 static void
1702 ev_view_goto_dest (EvView *view, EvLinkDest *dest)
1703 {
1704         EvLinkDestType type;
1705
1706         type = ev_link_dest_get_dest_type (dest);
1707
1708         if (type == EV_LINK_DEST_TYPE_NAMED) {
1709                 EvLinkDest  *dest2;
1710                 const gchar *named_dest;
1711
1712                 named_dest = ev_link_dest_get_named_dest (dest);
1713                 dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1714                                                           named_dest);
1715                 if (dest2) {
1716                         goto_dest (view, dest2);
1717                         g_object_unref (dest2);
1718                 }
1719
1720                 return;
1721         }
1722
1723         goto_dest (view, dest);
1724 }
1725
1726 void
1727 ev_view_handle_link (EvView *view, EvLink *link)
1728 {
1729         EvLinkAction    *action = NULL;
1730         EvLinkActionType type;
1731
1732         action = ev_link_get_action (link);
1733         if (!action)
1734                 return;
1735
1736         type = ev_link_action_get_action_type (action);
1737
1738         switch (type) {
1739                 case EV_LINK_ACTION_TYPE_GOTO_DEST: {
1740                         EvLinkDest *dest;
1741
1742                         g_signal_emit (view, signals[SIGNAL_HANDLE_LINK], 0, link);
1743
1744                         dest = ev_link_action_get_dest (action);
1745                         ev_view_goto_dest (view, dest);
1746                 }
1747                         break;
1748                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1749                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1750                 case EV_LINK_ACTION_TYPE_LAUNCH:
1751                 case EV_LINK_ACTION_TYPE_NAMED:
1752                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, action);
1753                         break;
1754         }
1755 }
1756
1757 gchar *
1758 ev_view_page_label_from_dest (EvView *view, EvLinkDest *dest)
1759 {
1760         EvLinkDestType type;
1761         gchar *msg = NULL;
1762
1763         type = ev_link_dest_get_dest_type (dest);
1764
1765         switch (type) {
1766                 case EV_LINK_DEST_TYPE_NAMED: {
1767                         EvLinkDest  *dest2;
1768                         const gchar *named_dest;
1769
1770                         named_dest = ev_link_dest_get_named_dest (dest);
1771                         dest2 = ev_document_links_find_link_dest (EV_DOCUMENT_LINKS (view->document),
1772                                                                   named_dest);
1773                         if (dest2) {
1774                                 msg = ev_document_get_page_label (view->document,
1775                                                                   ev_link_dest_get_page (dest2));
1776                                 g_object_unref (dest2);
1777                         }
1778                 }
1779
1780                         break;
1781                 case EV_LINK_DEST_TYPE_PAGE_LABEL: {
1782                         msg = g_strdup (ev_link_dest_get_page_label (dest));
1783                 }
1784                         break;
1785                 default:
1786                         msg = ev_document_get_page_label (view->document,
1787                                                           ev_link_dest_get_page (dest));
1788         }
1789
1790         return msg;
1791 }
1792
1793 static char *
1794 tip_from_action_named (EvLinkAction *action)
1795 {
1796         const gchar *name = ev_link_action_get_name (action);
1797
1798         if (g_ascii_strcasecmp (name, "FirstPage") == 0) {
1799                 return g_strdup (_("Go to first page"));
1800         } else if (g_ascii_strcasecmp (name, "PrevPage") == 0) {
1801                 return g_strdup (_("Go to previous page"));
1802         } else if (g_ascii_strcasecmp (name, "NextPage") == 0) {
1803                 return g_strdup (_("Go to next page"));
1804         } else if (g_ascii_strcasecmp (name, "LastPage") == 0) {
1805                 return g_strdup (_("Go to last page"));
1806         } else if (g_ascii_strcasecmp (name, "GoToPage") == 0) {
1807                 return g_strdup (_("Go to page"));
1808         } else if (g_ascii_strcasecmp (name, "Find") == 0) {
1809                 return g_strdup (_("Find"));
1810         }
1811
1812         return NULL;
1813 }
1814
1815 static char *
1816 tip_from_link (EvView *view, EvLink *link)
1817 {
1818         EvLinkAction *action;
1819         EvLinkActionType type;
1820         char *msg = NULL;
1821         char *page_label;
1822         const char *title;
1823
1824         action = ev_link_get_action (link);
1825         title = ev_link_get_title (link);
1826
1827         if (!action)
1828                 return title ? g_strdup (title) : NULL;
1829
1830         type = ev_link_action_get_action_type (action);
1831
1832         switch (type) {
1833                 case EV_LINK_ACTION_TYPE_GOTO_DEST:
1834                         page_label = ev_view_page_label_from_dest (view,
1835                                                                    ev_link_action_get_dest (action));
1836                         if (page_label) {
1837                                 msg = g_strdup_printf (_("Go to page %s"), page_label);
1838                                 g_free (page_label);
1839                         }
1840                         break;
1841                 case EV_LINK_ACTION_TYPE_GOTO_REMOTE:
1842                         if (title) {
1843                                 msg = g_strdup_printf (_("Go to %s on file “%s”"), title,
1844                                                        ev_link_action_get_filename (action));
1845                         } else {
1846                                 msg = g_strdup_printf (_("Go to file “%s”"),
1847                                                        ev_link_action_get_filename (action));
1848                         }
1849                         break;
1850                 case EV_LINK_ACTION_TYPE_EXTERNAL_URI:
1851                         msg = g_strdup (ev_link_action_get_uri (action));
1852                         break;
1853                 case EV_LINK_ACTION_TYPE_LAUNCH:
1854                         msg = g_strdup_printf (_("Launch %s"),
1855                                                ev_link_action_get_filename (action));
1856                         break;
1857                 case EV_LINK_ACTION_TYPE_NAMED:
1858                         msg = tip_from_action_named (action);
1859                         break;
1860                 default:
1861                         if (title)
1862                                 msg = g_strdup (title);
1863                         break;
1864         }
1865
1866         return msg;
1867 }
1868
1869 static void
1870 ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y)
1871 {
1872         EvLink       *link;
1873         EvFormField  *field;
1874         EvAnnotation *annot = NULL;
1875
1876         if (view->cursor == EV_VIEW_CURSOR_HIDDEN)
1877                 return;
1878
1879         if (view->drag_info.in_drag) {
1880                 if (view->cursor != EV_VIEW_CURSOR_DRAG)
1881                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1882                 return;
1883         }
1884
1885         if (view->scroll_info.autoscrolling) {
1886                 if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL)
1887                         ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL);
1888                 return;
1889         }
1890
1891         link = ev_view_get_link_at_location (view, x, y);
1892         if (link) {
1893                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1894         } else if ((field = ev_view_get_form_field_at_location (view, x, y)) && !view->presentation) {
1895                 if (field->is_read_only) {
1896                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1897                             view->cursor == EV_VIEW_CURSOR_IBEAM ||
1898                             view->cursor == EV_VIEW_CURSOR_DRAG)
1899                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1900                 } else if (EV_IS_FORM_FIELD_TEXT (field)) {
1901                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1902                 } else {
1903                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1904                 }
1905         } else if ((annot = ev_view_get_annotation_at_location (view, x, y)) && !view->presentation) {
1906                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1907         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y) && !view->presentation) {
1908                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1909         } else {
1910                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1911                     view->cursor == EV_VIEW_CURSOR_IBEAM ||
1912                     view->cursor == EV_VIEW_CURSOR_DRAG ||
1913                     view->cursor == EV_VIEW_CURSOR_AUTOSCROLL)
1914                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1915         }
1916
1917         if (link || annot)
1918                 g_object_set (view, "has-tooltip", TRUE, NULL);
1919 }
1920
1921 /*** Images ***/
1922 static EvImage *
1923 ev_view_get_image_at_location (EvView  *view,
1924                                gdouble  x,
1925                                gdouble  y)
1926 {
1927         gint page = -1;
1928         gint x_new = 0, y_new = 0;
1929         GList *image_mapping;
1930
1931         if (!EV_IS_DOCUMENT_IMAGES (view->document))
1932                 return NULL;
1933
1934         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1935                 return NULL;
1936
1937         image_mapping = ev_page_cache_get_image_mapping (view->page_cache, page);
1938
1939         if (image_mapping)
1940                 return ev_mapping_list_get_data (image_mapping, x_new, y_new);
1941         else
1942                 return NULL;
1943 }
1944
1945 /*** Forms ***/
1946 static EvFormField *
1947 ev_view_get_form_field_at_location (EvView  *view,
1948                                     gdouble  x,
1949                                     gdouble  y)
1950 {
1951         gint page = -1;
1952         gint x_new = 0, y_new = 0;
1953         GList *forms_mapping;
1954
1955         if (!EV_IS_DOCUMENT_FORMS (view->document))
1956                 return NULL;
1957
1958         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
1959                 return NULL;
1960
1961         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache, page);
1962
1963         if (forms_mapping)
1964                 return ev_mapping_list_get_data (forms_mapping, x_new, y_new);
1965         else
1966                 return NULL;
1967 }
1968
1969 static GdkRegion *
1970 ev_view_form_field_get_region (EvView      *view,
1971                                EvFormField *field)
1972 {
1973         GdkRectangle view_area;
1974         GList       *forms_mapping;
1975
1976         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
1977                                                               field->page->index);
1978         ev_view_get_area_from_mapping (view, field->page->index,
1979                                        forms_mapping,
1980                                        field, &view_area);
1981
1982         return gdk_region_rectangle (&view_area);
1983 }
1984
1985 static gboolean
1986 ev_view_forms_remove_widgets (EvView *view)
1987 {
1988         ev_view_remove_all (view);
1989
1990         return FALSE;
1991 }
1992
1993 static void
1994 ev_view_form_field_destroy (GtkWidget *widget,
1995                             EvView    *view)
1996 {
1997         g_idle_add ((GSourceFunc)ev_view_forms_remove_widgets, view);
1998 }
1999
2000 static GtkWidget *
2001 ev_view_form_field_button_create_widget (EvView      *view,
2002                                          EvFormField *field)
2003 {
2004         EvFormFieldButton *field_button = EV_FORM_FIELD_BUTTON (field);
2005         GdkRegion         *field_region = NULL;
2006
2007         switch (field_button->type) {
2008                 case EV_FORM_FIELD_BUTTON_PUSH:
2009                         return NULL;
2010                 case EV_FORM_FIELD_BUTTON_CHECK:
2011                 case EV_FORM_FIELD_BUTTON_RADIO: {
2012                         gboolean  state;
2013                         GList    *forms_mapping, *l;
2014
2015                         state = ev_document_forms_form_field_button_get_state (EV_DOCUMENT_FORMS (view->document),
2016                                                                                field);
2017
2018                         /* FIXME: it actually depends on NoToggleToOff flags */
2019                         if (field_button->type == EV_FORM_FIELD_BUTTON_RADIO &&
2020                             state && field_button->state)
2021                                 return NULL;
2022
2023                         field_region = ev_view_form_field_get_region (view, field);
2024
2025                         /* For radio buttons and checkbox buttons that are in a set
2026                          * we need to update also the region for the current selected item
2027                          */
2028                         forms_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2029                                                                               field->page->index);
2030                         for (l = forms_mapping; l; l = g_list_next (l)) {
2031                                 EvFormField *button = ((EvMapping *)(l->data))->data;
2032                                 GdkRegion   *button_region;
2033
2034                                 if (button->id == field->id)
2035                                         continue;
2036
2037                                 /* FIXME: only buttons in the same group should be updated */
2038                                 if (!EV_IS_FORM_FIELD_BUTTON (button) ||
2039                                     EV_FORM_FIELD_BUTTON (button)->type != field_button->type ||
2040                                     EV_FORM_FIELD_BUTTON (button)->state != TRUE)
2041                                         continue;
2042
2043                                 button_region = ev_view_form_field_get_region (view, button);
2044                                 gdk_region_union (field_region, button_region);
2045                                 gdk_region_destroy (button_region);
2046                         }
2047
2048                         ev_document_forms_form_field_button_set_state (EV_DOCUMENT_FORMS (view->document),
2049                                                                        field, !state);
2050                         field_button->state = !state;
2051                 }
2052                         break;
2053         }
2054
2055         ev_view_reload_page (view, field->page->index, field_region);
2056         gdk_region_destroy (field_region);
2057
2058         return NULL;
2059 }
2060
2061 static void
2062 ev_view_form_field_text_save (EvView    *view,
2063                               GtkWidget *widget)
2064 {
2065         EvFormField *field;
2066
2067         if (!view->document)
2068                 return;
2069
2070         field = g_object_get_data (G_OBJECT (widget), "form-field");
2071
2072         if (field->changed) {
2073                 EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2074                 GdkRegion       *field_region;
2075
2076                 field_region = ev_view_form_field_get_region (view, field);
2077
2078                 ev_document_forms_form_field_text_set_text (EV_DOCUMENT_FORMS (view->document),
2079                                                             field, field_text->text);
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_text_changed (GtkWidget   *widget,
2088                                  EvFormField *field)
2089 {
2090         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2091         gchar           *text = NULL;
2092
2093         if (GTK_IS_ENTRY (widget)) {
2094                 text = g_strdup (gtk_entry_get_text (GTK_ENTRY (widget)));
2095         } else if (GTK_IS_TEXT_BUFFER (widget)) {
2096                 GtkTextIter start, end;
2097
2098                 gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (widget), &start, &end);
2099                 text = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (widget),
2100                                                  &start, &end, FALSE);
2101         }
2102
2103         if (!field_text->text ||
2104             (field_text->text && g_ascii_strcasecmp (field_text->text, text) != 0)) {
2105                 g_free (field_text->text);
2106                 field_text->text = text;
2107                 field->changed = TRUE;
2108         }
2109 }
2110
2111 static GtkWidget *
2112 ev_view_form_field_text_create_widget (EvView      *view,
2113                                        EvFormField *field)
2114 {
2115         EvFormFieldText *field_text = EV_FORM_FIELD_TEXT (field);
2116         GtkWidget       *text = NULL;
2117         gchar           *txt;
2118
2119         txt = ev_document_forms_form_field_text_get_text (EV_DOCUMENT_FORMS (view->document),
2120                                                           field);
2121
2122         switch (field_text->type) {
2123                 case EV_FORM_FIELD_TEXT_FILE_SELECT:
2124                         /* TODO */
2125                 case EV_FORM_FIELD_TEXT_NORMAL:
2126                         text = gtk_entry_new ();
2127                         gtk_entry_set_has_frame (GTK_ENTRY (text), FALSE);
2128                         gtk_entry_set_max_length (GTK_ENTRY (text), field_text->max_len);
2129                         gtk_entry_set_visibility (GTK_ENTRY (text), !field_text->is_password);
2130
2131                         if (txt) {
2132                                 gtk_entry_set_text (GTK_ENTRY (text), txt);
2133                                 g_free (txt);
2134                         }
2135
2136                         g_signal_connect (text, "changed",
2137                                           G_CALLBACK (ev_view_form_field_text_changed),
2138                                           field);
2139                         g_signal_connect_after (text, "activate",
2140                                                 G_CALLBACK (ev_view_form_field_destroy),
2141                                                 view);
2142                         break;
2143                 case EV_FORM_FIELD_TEXT_MULTILINE: {
2144                         GtkTextBuffer *buffer;
2145
2146                         text = gtk_text_view_new ();
2147                         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
2148
2149                         if (txt) {
2150                                 gtk_text_buffer_set_text (buffer, txt, -1);
2151                                 g_free (txt);
2152                         }
2153
2154                         g_signal_connect (buffer, "changed",
2155                                           G_CALLBACK (ev_view_form_field_text_changed),
2156                                           field);
2157                 }
2158                         break;
2159         }
2160
2161         g_object_weak_ref (G_OBJECT (text),
2162                            (GWeakNotify)ev_view_form_field_text_save,
2163                            view);
2164
2165         return text;
2166 }
2167
2168 static void
2169 ev_view_form_field_choice_save (EvView    *view,
2170                                 GtkWidget *widget)
2171 {
2172         EvFormField *field;
2173
2174         if (!view->document)
2175                 return;
2176
2177         field = g_object_get_data (G_OBJECT (widget), "form-field");
2178
2179         if (field->changed) {
2180                 GList             *l;
2181                 EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2182                 GdkRegion         *field_region;
2183
2184                 field_region = ev_view_form_field_get_region (view, field);
2185
2186                 if (field_choice->is_editable) {
2187                         ev_document_forms_form_field_choice_set_text (EV_DOCUMENT_FORMS (view->document),
2188                                                                       field, field_choice->text);
2189                 } else {
2190                         ev_document_forms_form_field_choice_unselect_all (EV_DOCUMENT_FORMS (view->document), field);
2191                         for (l = field_choice->selected_items; l; l = g_list_next (l)) {
2192                                 ev_document_forms_form_field_choice_select_item (EV_DOCUMENT_FORMS (view->document),
2193                                                                                  field,
2194                                                                                  GPOINTER_TO_INT (l->data));
2195                         }
2196                 }
2197                 field->changed = FALSE;
2198                 ev_view_reload_page (view, field->page->index, field_region);
2199                 gdk_region_destroy (field_region);
2200         }
2201 }
2202
2203 static void
2204 ev_view_form_field_choice_changed (GtkWidget   *widget,
2205                                    EvFormField *field)
2206 {
2207         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2208
2209         if (GTK_IS_COMBO_BOX (widget)) {
2210                 gint item;
2211
2212                 item = gtk_combo_box_get_active (GTK_COMBO_BOX (widget));
2213                 if (!field_choice->selected_items ||
2214                     GPOINTER_TO_INT (field_choice->selected_items->data) != item) {
2215                         g_list_free (field_choice->selected_items);
2216                         field_choice->selected_items = NULL;
2217                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2218                                                                        GINT_TO_POINTER (item));
2219                         field->changed = TRUE;
2220                 }
2221
2222                 if (GTK_IS_COMBO_BOX_ENTRY (widget)) {
2223                         gchar *text;
2224
2225                         text = gtk_combo_box_get_active_text (GTK_COMBO_BOX (widget));
2226                         if (!field_choice->text ||
2227                             (field_choice->text && g_ascii_strcasecmp (field_choice->text, text) != 0)) {
2228                                 g_free (field_choice->text);
2229                                 field_choice->text = text;
2230                                 field->changed = TRUE;
2231                         }
2232                 }
2233         } else if (GTK_IS_TREE_SELECTION (widget)) {
2234                 GtkTreeSelection *selection = GTK_TREE_SELECTION (widget);
2235                 GtkTreeModel     *model;
2236                 GList            *items, *l;
2237
2238                 items = gtk_tree_selection_get_selected_rows (selection, &model);
2239                 g_list_free (field_choice->selected_items);
2240                 field_choice->selected_items = NULL;
2241
2242                 for (l = items; l && l->data; l = g_list_next (l)) {
2243                         GtkTreeIter  iter;
2244                         GtkTreePath *path = (GtkTreePath *)l->data;
2245                         gint         item;
2246
2247                         gtk_tree_model_get_iter (model, &iter, path);
2248                         gtk_tree_model_get (model, &iter, 1, &item, -1);
2249
2250                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2251                                                                        GINT_TO_POINTER (item));
2252
2253                         gtk_tree_path_free (path);
2254                 }
2255
2256                 g_list_free (items);
2257
2258                 field->changed = TRUE;
2259         }
2260 }
2261
2262 static GtkWidget *
2263 ev_view_form_field_choice_create_widget (EvView      *view,
2264                                          EvFormField *field)
2265 {
2266         EvFormFieldChoice *field_choice = EV_FORM_FIELD_CHOICE (field);
2267         GtkWidget         *choice;
2268         GtkTreeModel      *model;
2269         gint               n_items, i;
2270         gint               selected_item = 0;
2271
2272         n_items = ev_document_forms_form_field_choice_get_n_items (EV_DOCUMENT_FORMS (view->document),
2273                                                                    field);
2274         model = GTK_TREE_MODEL (gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_INT));
2275         for (i = 0; i < n_items; i++) {
2276                 GtkTreeIter iter;
2277                 gchar      *item;
2278
2279                 item = ev_document_forms_form_field_choice_get_item (EV_DOCUMENT_FORMS (view->document),
2280                                                                      field, i);
2281                 if (ev_document_forms_form_field_choice_is_item_selected (
2282                             EV_DOCUMENT_FORMS (view->document), field, i)) {
2283                         selected_item = i;
2284                         /* FIXME: we need a get_selected_items function in poppler */
2285                         field_choice->selected_items = g_list_prepend (field_choice->selected_items,
2286                                                                        GINT_TO_POINTER (i));
2287                 }
2288
2289                 if (item) {
2290                         gtk_list_store_append (GTK_LIST_STORE (model), &iter);
2291                         gtk_list_store_set (GTK_LIST_STORE (model), &iter,
2292                                             0, item,
2293                                             1, i,
2294                                             -1);
2295                         g_free (item);
2296                 }
2297         }
2298
2299         if (field_choice->type == EV_FORM_FIELD_CHOICE_LIST) {
2300                 GtkCellRenderer  *renderer;
2301                 GtkWidget        *tree_view;
2302                 GtkTreeSelection *selection;
2303
2304                 tree_view = gtk_tree_view_new_with_model (model);
2305                 gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree_view), FALSE);
2306
2307                 selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
2308                 if (field_choice->multi_select) {
2309                         gtk_tree_selection_set_mode (selection, GTK_SELECTION_MULTIPLE);
2310                 }
2311
2312                 /* TODO: set selected items */
2313
2314                 renderer = gtk_cell_renderer_text_new ();
2315                 gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (tree_view),
2316                                                              0,
2317                                                              "choix", renderer,
2318                                                              "text", 0,
2319                                                              NULL);
2320
2321                 choice = gtk_scrolled_window_new (NULL, NULL);
2322                 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (choice),
2323                                                 GTK_POLICY_AUTOMATIC,
2324                                                 GTK_POLICY_AUTOMATIC);
2325                 gtk_container_add (GTK_CONTAINER (choice), tree_view);
2326                 gtk_widget_show (tree_view);
2327
2328                 g_signal_connect (selection, "changed",
2329                                   G_CALLBACK (ev_view_form_field_choice_changed),
2330                                   field);
2331                 g_signal_connect_after (selection, "changed",
2332                                         G_CALLBACK (ev_view_form_field_destroy),
2333                                         view);
2334         } else if (field_choice->is_editable) { /* ComboBoxEntry */
2335                 gchar *text;
2336
2337                 choice = gtk_combo_box_entry_new_with_model (model, 0);
2338                 text = ev_document_forms_form_field_choice_get_text (EV_DOCUMENT_FORMS (view->document), field);
2339                 if (text) {
2340                         gtk_entry_set_text (GTK_ENTRY (gtk_bin_get_child (GTK_BIN (choice))), text);
2341                         g_free (text);
2342                 }
2343
2344                 g_signal_connect (choice, "changed",
2345                                   G_CALLBACK (ev_view_form_field_choice_changed),
2346                                   field);
2347                 g_signal_connect_after (GTK_BIN(choice)->child, "activate",
2348                                         G_CALLBACK (ev_view_form_field_destroy),
2349                                         view);
2350         } else { /* ComboBoxText */
2351                 GtkCellRenderer *renderer;
2352
2353                 choice = gtk_combo_box_new_with_model (model);
2354                 renderer = gtk_cell_renderer_text_new ();
2355                 gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (choice),
2356                                             renderer, TRUE);
2357                 gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (choice),
2358                                                 renderer,
2359                                                 "text", 0,
2360                                                 NULL);
2361                 gtk_combo_box_set_active (GTK_COMBO_BOX (choice), selected_item);
2362                 gtk_combo_box_popup (GTK_COMBO_BOX (choice));
2363
2364                 g_signal_connect (choice, "changed",
2365                                   G_CALLBACK (ev_view_form_field_choice_changed),
2366                                   field);
2367                 g_signal_connect_after (choice, "changed",
2368                                         G_CALLBACK (ev_view_form_field_destroy),
2369                                         view);
2370         }
2371
2372         g_object_unref (model);
2373
2374         g_object_weak_ref (G_OBJECT (choice),
2375                            (GWeakNotify)ev_view_form_field_choice_save,
2376                            view);
2377
2378         return choice;
2379 }
2380
2381 static void
2382 ev_view_handle_form_field (EvView      *view,
2383                            EvFormField *field,
2384                            gdouble      x,
2385                            gdouble      y)
2386 {
2387         GtkWidget   *field_widget = NULL;
2388         GList       *form_field_mapping;
2389         GdkRectangle view_area;
2390
2391         if (field->is_read_only)
2392                 return;
2393
2394         if (EV_IS_FORM_FIELD_BUTTON (field)) {
2395                 field_widget = ev_view_form_field_button_create_widget (view, field);
2396         } else if (EV_IS_FORM_FIELD_TEXT (field)) {
2397                 field_widget = ev_view_form_field_text_create_widget (view, field);
2398         } else if (EV_IS_FORM_FIELD_CHOICE (field)) {
2399                 field_widget = ev_view_form_field_choice_create_widget (view, field);
2400         } else if (EV_IS_FORM_FIELD_SIGNATURE (field)) {
2401                 /* TODO */
2402         }
2403
2404         /* Form field doesn't require a widget */
2405         if (!field_widget)
2406                 return;
2407
2408         g_object_set_data_full (G_OBJECT (field_widget), "form-field",
2409                                 g_object_ref (field),
2410                                 (GDestroyNotify)g_object_unref);
2411
2412         form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2413                                                                    field->page->index);
2414         ev_view_get_area_from_mapping (view, field->page->index,
2415                                        form_field_mapping,
2416                                        field, &view_area);
2417
2418         gtk_layout_put (GTK_LAYOUT (view), field_widget, view_area.x, view_area.y);
2419         gtk_widget_show (field_widget);
2420         gtk_widget_grab_focus (field_widget);
2421 }
2422
2423 /* Annotations */
2424 static EvViewWindowChild *
2425 ev_view_get_window_child (EvView    *view,
2426                           GtkWidget *window)
2427 {
2428         GList *children = view->window_children;
2429
2430         while (children) {
2431                 EvViewWindowChild *child;
2432
2433                 child = (EvViewWindowChild *)children->data;
2434                 children = children->next;
2435
2436                 if (child->window == window)
2437                         return child;
2438         }
2439
2440         return NULL;
2441 }
2442
2443 static void
2444 ev_view_window_child_move (EvView            *view,
2445                            EvViewWindowChild *child,
2446                            gint               x,
2447                            gint               y)
2448 {
2449         child->x = x;
2450         child->y = y;
2451         gtk_window_move (GTK_WINDOW (child->window),
2452                          MAX (child->parent_x, x),
2453                          MAX (child->parent_y, y));
2454 }
2455
2456 static void
2457 ev_view_window_child_move_with_parent (EvView    *view,
2458                                        GtkWidget *window)
2459 {
2460         EvViewWindowChild *child;
2461         gint               root_x, root_y;
2462
2463         child = ev_view_get_window_child (view, window);
2464         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2465                                &root_x, &root_y);
2466         if (root_x != child->parent_x || root_y != child->parent_y) {
2467                 gint dest_x, dest_y;
2468
2469                 dest_x = child->x + (root_x - child->parent_x);
2470                 dest_y = child->y + (root_y - child->parent_y);
2471                 child->parent_x = root_x;
2472                 child->parent_y = root_y;
2473                 ev_view_window_child_move (view, child, dest_x, dest_y);
2474         }
2475
2476         if (child->visible && !GTK_WIDGET_VISIBLE (window))
2477                 gtk_widget_show (window);
2478 }
2479
2480 static void
2481 ev_view_window_child_put (EvView    *view,
2482                           GtkWidget *window,
2483                           guint      page,
2484                           gint       x,
2485                           gint       y,
2486                           gdouble    orig_x,
2487                           gdouble    orig_y)
2488 {
2489         EvViewWindowChild *child;
2490         gint               root_x, root_y;
2491
2492         gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2493                                &root_x, &root_y);
2494
2495         child = g_new0 (EvViewWindowChild, 1);
2496         child->window = window;
2497         child->page = page;
2498         child->orig_x = orig_x;
2499         child->orig_y = orig_y;
2500         child->parent_x = root_x;
2501         child->parent_y = root_y;
2502         child->visible = ev_annotation_window_is_open (EV_ANNOTATION_WINDOW (window));
2503         ev_view_window_child_move (view, child, x + root_x, y + root_y);
2504
2505         if (child->visible)
2506                 gtk_widget_show (window);
2507         else
2508                 gtk_widget_hide (window);
2509
2510         view->window_children = g_list_append (view->window_children, child);
2511 }
2512
2513 static EvViewWindowChild *
2514 ev_view_find_window_child_for_annot (EvView       *view,
2515                                      guint         page,
2516                                      EvAnnotation *annot)
2517 {
2518         GList *children = view->window_children;
2519
2520         while (children) {
2521                 EvViewWindowChild *child;
2522                 EvAnnotation      *wannot;
2523
2524                 child = (EvViewWindowChild *)children->data;
2525                 children = children->next;
2526
2527                 if (child->page != page)
2528                         continue;
2529
2530                 wannot = ev_annotation_window_get_annotation (EV_ANNOTATION_WINDOW (child->window));
2531                 if (wannot == annot || strcmp (wannot->name, annot->name) == 0)
2532                         return child;
2533         }
2534
2535         return NULL;
2536 }
2537
2538 static void
2539 ev_view_window_children_free (EvView *view)
2540 {
2541         GList *l;
2542
2543         if (!view->window_children)
2544                 return;
2545
2546         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2547                 EvViewWindowChild *child;
2548
2549                 child = (EvViewWindowChild *)l->data;
2550                 gtk_widget_destroy (GTK_WIDGET (child->window));
2551                 g_free (child);
2552         }
2553         g_list_free (view->window_children);
2554         view->window_children = NULL;
2555         view->window_child_focus = NULL;
2556 }
2557
2558 static void
2559 annotation_window_grab_focus (GtkWidget *widget,
2560                               EvView    *view)
2561 {
2562         if (view->window_child_focus)
2563                 ev_annotation_window_ungrab_focus (EV_ANNOTATION_WINDOW (view->window_child_focus->window));
2564         view->window_child_focus = ev_view_get_window_child (view, widget);
2565 }
2566
2567 static void
2568 annotation_window_closed (EvAnnotationWindow *window,
2569                           EvView             *view)
2570 {
2571         EvViewWindowChild *child;
2572
2573         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2574         child->visible = FALSE;
2575 }
2576
2577 static void
2578 annotation_window_moved (EvAnnotationWindow *window,
2579                          gint                x,
2580                          gint                y,
2581                          EvView             *view)
2582 {
2583         EvViewWindowChild *child;
2584         GdkRectangle       page_area;
2585         GtkBorder          border;
2586         GdkRectangle       view_rect;
2587         EvRectangle        doc_rect;
2588         gint               width, height;
2589
2590         child = ev_view_get_window_child (view, GTK_WIDGET (window));
2591         if (child->x == x && child->y == y)
2592                 return;
2593
2594         child->moved = TRUE;
2595         child->x = x;
2596         child->y = y;
2597
2598         /* Window has been moved by the user,
2599          * we have to set a new origin in doc coords
2600          */
2601         gtk_window_get_size (GTK_WINDOW (window), &width, &height);
2602         view_rect.x = (x - child->parent_x) + view->scroll_x;
2603         view_rect.y = (y - child->parent_y) + view->scroll_y;
2604         view_rect.width = width;
2605         view_rect.height = height;
2606
2607         get_page_extents (view, child->page, &page_area, &border);
2608         view_rect_to_doc_rect (view, &view_rect, &page_area, &doc_rect);
2609         child->orig_x = doc_rect.x1;
2610         child->orig_y = doc_rect.y1;
2611 }
2612
2613 static void
2614 ev_view_annotation_save (EvView       *view,
2615                          EvAnnotation *annot)
2616 {
2617         if (!view->document)
2618                 return;
2619
2620         if (!annot->changed)
2621                 return;
2622
2623         ev_document_annotations_annotation_set_contents (EV_DOCUMENT_ANNOTATIONS (view->document),
2624                                                          annot, annot->contents);
2625         annot->changed = FALSE;
2626 }
2627
2628 static void
2629 show_annotation_windows (EvView *view,
2630                          gint    page)
2631 {
2632         GList     *annots, *l;
2633         GtkWindow *parent;
2634
2635         parent = GTK_WINDOW (gtk_widget_get_toplevel (GTK_WIDGET (view)));
2636
2637         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2638
2639         for (l = annots; l && l->data; l = g_list_next (l)) {
2640                 EvAnnotation      *annot;
2641                 EvViewWindowChild *child;
2642                 GtkWidget         *window;
2643                 EvRectangle       *doc_rect;
2644                 GdkRectangle       view_rect;
2645
2646                 annot = ((EvMapping *)(l->data))->data;
2647
2648                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2649                         continue;
2650
2651                 if (!ev_annotation_markup_has_popup (EV_ANNOTATION_MARKUP (annot)))
2652                         continue;
2653
2654                 window = g_object_get_data (G_OBJECT (annot), "popup");
2655                 if (window) {
2656                         ev_view_window_child_move_with_parent (view, window);
2657                         continue;
2658                 }
2659
2660                 /* Look if we already have a popup for this annot */
2661                 child = ev_view_find_window_child_for_annot (view, page, annot);
2662                 window = child ? child->window : NULL;
2663                 if (window) {
2664                         ev_annotation_window_set_annotation (EV_ANNOTATION_WINDOW (window), annot);
2665                         g_object_set_data (G_OBJECT (annot), "popup", window);
2666                         ev_view_window_child_move_with_parent (view, window);
2667                 } else {
2668                         window = ev_annotation_window_new (annot, parent);
2669                         g_signal_connect (window, "grab_focus",
2670                                           G_CALLBACK (annotation_window_grab_focus),
2671                                           view);
2672                         g_signal_connect (window, "closed",
2673                                           G_CALLBACK (annotation_window_closed),
2674                                           view);
2675                         g_signal_connect (window, "moved",
2676                                           G_CALLBACK (annotation_window_moved),
2677                                           view);
2678                         g_object_set_data (G_OBJECT (annot), "popup", window);
2679
2680                         doc_rect = (EvRectangle *)ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (window));
2681                         doc_rect_to_view_rect (view, page, doc_rect, &view_rect);
2682                         view_rect.x -= view->scroll_x;
2683                         view_rect.y -= view->scroll_y;
2684
2685                         ev_view_window_child_put (view, window, page,
2686                                                   view_rect.x, view_rect.y,
2687                                                   doc_rect->x1, doc_rect->y1);
2688
2689                         g_object_weak_ref (G_OBJECT (annot),
2690                                            (GWeakNotify)ev_view_annotation_save,
2691                                            view);
2692                 }
2693         }
2694 }
2695
2696 static void
2697 hide_annotation_windows (EvView *view,
2698                          gint    page)
2699 {
2700         GList *annots, *l;
2701
2702         annots = ev_page_cache_get_annot_mapping (view->page_cache, page);
2703
2704         for (l = annots; l && l->data; l = g_list_next (l)) {
2705                 EvAnnotation *annot;
2706                 GtkWidget    *window;
2707
2708                 annot = ((EvMapping *)(l->data))->data;
2709
2710                 if (!EV_IS_ANNOTATION_MARKUP (annot))
2711                         continue;
2712
2713                 window = g_object_get_data (G_OBJECT (annot), "popup");
2714                 if (window)
2715                         gtk_widget_hide (window);
2716         }
2717 }
2718
2719 static EvAnnotation *
2720 ev_view_get_annotation_at_location (EvView  *view,
2721                                     gdouble  x,
2722                                     gdouble  y)
2723 {
2724         gint page = -1;
2725         gint x_new = 0, y_new = 0;
2726         GList *annotations_mapping;
2727
2728         if (!EV_IS_DOCUMENT_ANNOTATIONS (view->document))
2729                 return NULL;
2730
2731         if (!get_doc_point_from_location (view, x, y, &page, &x_new, &y_new))
2732                 return NULL;
2733
2734         annotations_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
2735
2736         if (annotations_mapping)
2737                 return ev_mapping_list_get_data (annotations_mapping, x_new, y_new);
2738         else
2739                 return NULL;
2740 }
2741
2742 static void
2743 ev_view_handle_annotation (EvView       *view,
2744                            EvAnnotation *annot,
2745                            gdouble       x,
2746                            gdouble       y,
2747                            guint32       timestamp)
2748 {
2749         if (EV_IS_ANNOTATION_MARKUP (annot)) {
2750                 GtkWidget *window;
2751
2752                 window = g_object_get_data (G_OBJECT (annot), "popup");
2753                 if (window) {
2754                         EvViewWindowChild *child;
2755
2756                         child = ev_view_get_window_child (view, window);
2757                         if (!child->visible) {
2758                                 child->visible = TRUE;
2759                                 ev_view_window_child_move (view, child, child->x, child->y);
2760                                 gtk_widget_show (window);
2761                         }
2762                 }
2763         }
2764
2765         if (EV_IS_ANNOTATION_ATTACHMENT (annot)) {
2766                 EvAttachment *attachment = EV_ANNOTATION_ATTACHMENT (annot)->attachment;
2767
2768                 if (attachment) {
2769                         GError *error = NULL;
2770
2771                         ev_attachment_open (attachment,
2772                                             gtk_widget_get_screen (GTK_WIDGET (view)),
2773                                             timestamp,
2774                                             &error);
2775
2776                         if (error) {
2777                                 g_warning ("%s", error->message);
2778                                 g_error_free (error);
2779                         }
2780                 }
2781         }
2782 }
2783
2784 /*** GtkWidget implementation ***/
2785
2786 static void
2787 ev_view_size_request_continuous_dual_page (EvView         *view,
2788                                            GtkRequisition *requisition)
2789 {
2790         gint n_pages;
2791
2792         n_pages = ev_document_get_n_pages (view->document) + 1;
2793         get_page_y_offset (view, n_pages, &requisition->height);
2794
2795         switch (view->sizing_mode) {
2796                 case EV_SIZING_FIT_WIDTH:
2797                 case EV_SIZING_BEST_FIT:
2798                         requisition->width = 1;
2799
2800                         break;
2801                 case EV_SIZING_FREE: {
2802                         gint max_width;
2803                         GtkBorder border;
2804
2805                         ev_view_get_max_page_size (view, &max_width, NULL);
2806                         compute_border (view, max_width, max_width, &border);
2807                         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
2808                 }
2809                         break;
2810                 default:
2811                         g_assert_not_reached ();
2812         }
2813 }
2814
2815 static void
2816 ev_view_size_request_continuous (EvView         *view,
2817                                  GtkRequisition *requisition)
2818 {
2819         gint n_pages;
2820
2821         n_pages = ev_document_get_n_pages (view->document);
2822         get_page_y_offset (view, n_pages, &requisition->height);
2823
2824         switch (view->sizing_mode) {
2825                 case EV_SIZING_FIT_WIDTH:
2826                 case EV_SIZING_BEST_FIT:
2827                         requisition->width = 1;
2828
2829                         break;
2830                 case EV_SIZING_FREE: {
2831                         gint max_width;
2832                         GtkBorder border;
2833
2834                         ev_view_get_max_page_size (view, &max_width, NULL);
2835                         compute_border (view, max_width, max_width, &border);
2836                         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
2837                 }
2838                         break;
2839                 default:
2840                         g_assert_not_reached ();
2841         }
2842 }
2843
2844 static void
2845 ev_view_size_request_dual_page (EvView         *view,
2846                                 GtkRequisition *requisition)
2847 {
2848         GtkBorder border;
2849         gint width, height;
2850
2851         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2852                 requisition->width = 1;
2853                 requisition->height = 1;
2854
2855                 return;
2856         }
2857
2858         /* Find the largest of the two. */
2859         ev_view_get_page_size (view,
2860                                view->current_page,
2861                                &width, &height);
2862         if (view->current_page + 1 < ev_document_get_n_pages (view->document)) {
2863                 gint width_2, height_2;
2864                 ev_view_get_page_size (view,
2865                                        view->current_page + 1,
2866                                        &width_2, &height_2);
2867                 if (width_2 > width) {
2868                         width = width_2;
2869                         height = height_2;
2870                 }
2871         }
2872         compute_border (view, width, height, &border);
2873
2874         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2875                 ((width + border.left + border.right) * 2) + (view->spacing * 3);
2876         requisition->height = (height + border.top + border.bottom) + (view->spacing * 2);
2877 }
2878
2879 static void
2880 ev_view_size_request_single_page (EvView         *view,
2881                                   GtkRequisition *requisition)
2882 {
2883         GtkBorder border;
2884         gint width, height;
2885
2886         if (view->sizing_mode == EV_SIZING_BEST_FIT) {
2887                 requisition->width = 1;
2888                 requisition->height = 1;
2889
2890                 return;
2891         }
2892
2893         ev_view_get_page_size (view, view->current_page, &width, &height);
2894         compute_border (view, width, height, &border);
2895
2896         requisition->width = view->sizing_mode == EV_SIZING_FIT_WIDTH ? 1 :
2897                 width + border.left + border.right + (2 * view->spacing);
2898         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
2899 }
2900
2901 static void
2902 ev_view_size_request (GtkWidget      *widget,
2903                       GtkRequisition *requisition)
2904 {
2905         EvView *view = EV_VIEW (widget);
2906
2907         if (view->document == NULL) {
2908                 requisition->width = 1;
2909                 requisition->height = 1;
2910                 return;
2911         }
2912
2913         if (view->presentation) {
2914                 requisition->width = 1;
2915                 requisition->height = 1;
2916                 return;
2917         }
2918
2919         if (view->continuous && view->dual_page)
2920                 ev_view_size_request_continuous_dual_page (view, requisition);
2921         else if (view->continuous)
2922                 ev_view_size_request_continuous (view, requisition);
2923         else if (view->dual_page)
2924                 ev_view_size_request_dual_page (view, requisition);
2925         else
2926                 ev_view_size_request_single_page (view, requisition);
2927 }
2928
2929 static void
2930 ev_view_size_allocate (GtkWidget      *widget,
2931                        GtkAllocation  *allocation)
2932 {
2933         EvView *view = EV_VIEW (widget);
2934         GList  *children, *l;
2935         gint    root_x, root_y;
2936
2937         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
2938
2939         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2940             view->sizing_mode == EV_SIZING_BEST_FIT) {
2941                 ev_view_zoom_for_size (view,
2942                                        allocation->width,
2943                                        allocation->height);
2944                 ev_view_size_request (widget, &widget->requisition);
2945         }
2946
2947         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
2948         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
2949
2950         if (view->document)
2951                 view_update_range_and_current_page (view);
2952
2953         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2954         view->pending_resize = FALSE;
2955         view->pending_point.x = 0;
2956         view->pending_point.y = 0;
2957
2958         children = gtk_container_get_children (GTK_CONTAINER (widget));
2959         for (l = children; l && l->data; l = g_list_next (l)) {
2960                 EvFormField   *field;
2961                 GdkRectangle   view_area;
2962                 GList         *form_field_mapping;
2963                 GtkAllocation  child_allocation;
2964                 GtkRequisition child_requisition;
2965                 GtkWidget     *child = (GtkWidget *)l->data;
2966
2967                 field = g_object_get_data (G_OBJECT (child), "form-field");
2968                 if (!field)
2969                         continue;
2970
2971                 form_field_mapping = ev_page_cache_get_form_field_mapping (view->page_cache,
2972                                                                            field->page->index);
2973                 ev_view_get_area_from_mapping (view, field->page->index,
2974                                                form_field_mapping,
2975                                                field, &view_area);
2976
2977                 gtk_widget_size_request (child, &child_requisition);
2978                 if (child_requisition.width != view_area.width ||
2979                     child_requisition.height != view_area.height)
2980                         gtk_widget_set_size_request (child, view_area.width, view_area.height);
2981
2982                 gtk_container_child_get (GTK_CONTAINER (widget),
2983                                          child,
2984                                          "x", &child_allocation.x,
2985                                          "y", &child_allocation.y,
2986                                          NULL);
2987                 if (child_allocation.x != view_area.x ||
2988                     child_allocation.y != view_area.y) {
2989                         gtk_layout_move (GTK_LAYOUT (widget), child, view_area.x, view_area.y);
2990                 }
2991         }
2992         g_list_free (children);
2993
2994         if (view->window_children)
2995                 gdk_window_get_origin (gtk_widget_get_window (GTK_WIDGET (view)),
2996                                        &root_x, &root_y);
2997
2998         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
2999                 EvViewWindowChild *child;
3000                 EvRectangle        doc_rect;
3001                 GdkRectangle       view_rect;
3002
3003                 child = (EvViewWindowChild *)l->data;
3004
3005                 doc_rect = *ev_annotation_window_get_rectangle (EV_ANNOTATION_WINDOW (child->window));
3006                 if (child->moved) {
3007                         doc_rect.x1 = child->orig_x;
3008                         doc_rect.y1 = child->orig_y;
3009                 }
3010                 doc_rect_to_view_rect (view, child->page, &doc_rect, &view_rect);
3011                 view_rect.x -= view->scroll_x;
3012                 view_rect.y -= view->scroll_y;
3013
3014                 if (view_rect.x != child->orig_x || view_rect.y != child->orig_y) {
3015                         child->parent_x = root_x;
3016                         child->parent_y = root_y;
3017                         ev_view_window_child_move (view, child, view_rect.x + root_x, view_rect.y + root_y);
3018                 }
3019         }
3020 }
3021
3022 static void
3023 ev_view_realize (GtkWidget *widget)
3024 {
3025         EvView *view = EV_VIEW (widget);
3026
3027         if (GTK_WIDGET_CLASS (ev_view_parent_class)->realize)
3028                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->realize) (widget);
3029
3030         gdk_window_set_events (view->layout.bin_window,
3031                                (gdk_window_get_events (view->layout.bin_window) |
3032                                 GDK_EXPOSURE_MASK |
3033                                 GDK_BUTTON_PRESS_MASK |
3034                                 GDK_BUTTON_RELEASE_MASK |
3035                                 GDK_SCROLL_MASK |
3036                                 GDK_KEY_PRESS_MASK |
3037                                 GDK_POINTER_MOTION_MASK |
3038                                 GDK_POINTER_MOTION_HINT_MASK |
3039                                 GDK_ENTER_NOTIFY_MASK |
3040                                 GDK_LEAVE_NOTIFY_MASK));
3041
3042         if (view->presentation)
3043                 gdk_window_set_background (view->layout.bin_window, &widget->style->black);
3044         else
3045                 gdk_window_set_background (view->layout.bin_window, &widget->style->mid [GTK_STATE_NORMAL]);
3046
3047         on_adjustment_value_changed (NULL, view);
3048 }
3049
3050 static gboolean
3051 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
3052 {
3053         EvView *view = EV_VIEW (widget);
3054         guint state;
3055
3056         state = event->state & gtk_accelerator_get_default_mod_mask ();
3057
3058         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
3059                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_FREE);
3060                 if (event->direction == GDK_SCROLL_UP ||
3061                     event->direction == GDK_SCROLL_LEFT) {
3062                         if (ev_view_can_zoom_in (view)) {
3063                                 ev_view_zoom_in (view);
3064                         }
3065                 } else {
3066                         if (ev_view_can_zoom_out (view)) {
3067                                 ev_view_zoom_out (view);
3068                         }
3069                 }
3070
3071                 return TRUE;
3072         }
3073
3074         view->jump_to_find_result = FALSE;
3075
3076         /* Shift+Wheel scrolls the in the perpendicular direction */
3077         if (state & GDK_SHIFT_MASK) {
3078                 if (event->direction == GDK_SCROLL_UP)
3079                         event->direction = GDK_SCROLL_LEFT;
3080                 else if (event->direction == GDK_SCROLL_LEFT)
3081                         event->direction = GDK_SCROLL_UP;
3082                 else if (event->direction == GDK_SCROLL_DOWN)
3083                         event->direction = GDK_SCROLL_RIGHT;
3084                 else if (event->direction == GDK_SCROLL_RIGHT)
3085                         event->direction = GDK_SCROLL_DOWN;
3086
3087                 event->state &= ~GDK_SHIFT_MASK;
3088                 state &= ~GDK_SHIFT_MASK;
3089         }
3090
3091         if (state == 0 &&
3092             (view->presentation ||
3093              (view->sizing_mode == EV_SIZING_BEST_FIT && !view->continuous))) {
3094                 switch (event->direction) {
3095                         case GDK_SCROLL_DOWN:
3096                         case GDK_SCROLL_RIGHT:
3097                                 ev_view_next_page (view);
3098                                 break;
3099                         case GDK_SCROLL_UP:
3100                         case GDK_SCROLL_LEFT:
3101                                 ev_view_previous_page (view);
3102                                 break;
3103                 }
3104
3105                 return TRUE;
3106         }
3107
3108         return FALSE;
3109 }
3110
3111 static EvViewSelection *
3112 find_selection_for_page (EvView *view,
3113                          gint    page)
3114 {
3115         GList *list;
3116
3117         for (list = view->selection_info.selections; list != NULL; list = list->next) {
3118                 EvViewSelection *selection;
3119
3120                 selection = (EvViewSelection *) list->data;
3121
3122                 if (selection->page == page)
3123                         return selection;
3124         }
3125
3126         return NULL;
3127 }
3128
3129 static void
3130 draw_end_presentation_page (EvView       *view,
3131                             GdkRectangle *page_area)
3132 {
3133         PangoLayout *layout;
3134         PangoFontDescription *font_desc;
3135         gchar *markup;
3136         const gchar *text = _("End of presentation. Press Escape to exit.");
3137
3138         if (view->presentation_state != EV_PRESENTATION_END)
3139                 return;
3140
3141         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), NULL);
3142         markup = g_strdup_printf ("<span foreground=\"white\">%s</span>", text);
3143         pango_layout_set_markup (layout, markup, -1);
3144         g_free (markup);
3145
3146         font_desc = pango_font_description_new ();
3147         pango_font_description_set_size (font_desc, 16 * PANGO_SCALE);
3148         pango_layout_set_font_description (layout, font_desc);
3149
3150         gtk_paint_layout (GTK_WIDGET (view)->style,
3151                           view->layout.bin_window,
3152                           GTK_WIDGET_STATE (view),
3153                           FALSE,
3154                           page_area,
3155                           GTK_WIDGET (view),
3156                           NULL,
3157                           page_area->x + 15,
3158                           page_area->y + 15,
3159                           layout);
3160
3161         pango_font_description_free (font_desc);
3162         g_object_unref (layout);
3163 }
3164
3165 static gboolean
3166 ev_view_expose_event (GtkWidget      *widget,
3167                       GdkEventExpose *event)
3168 {
3169         EvView  *view = EV_VIEW (widget);
3170         cairo_t *cr;
3171         gint     i;
3172
3173         if (view->animation) {
3174                 if (ev_transition_animation_ready (view->animation)) {
3175                         GdkRectangle page_area;
3176                         GtkBorder    border;
3177
3178                         if (get_page_extents (view, view->current_page, &page_area, &border)) {
3179                                 cr = gdk_cairo_create (view->layout.bin_window);
3180
3181                                 /* normalize to x=0, y=0 */
3182                                 cairo_translate (cr, page_area.x, page_area.y);
3183                                 page_area.x = page_area.y = 0;
3184
3185                                 ev_transition_animation_paint (view->animation, cr, page_area);
3186                                 cairo_destroy (cr);
3187                         }
3188                 }
3189
3190                 return TRUE;
3191         }
3192
3193         if (view->presentation) {
3194                 switch (view->presentation_state) {
3195                         case EV_PRESENTATION_END: {
3196                                 GdkRectangle area = {0};
3197
3198                                 area.width = widget->allocation.width;
3199                                 area.height = widget->allocation.height;
3200
3201                                 draw_end_presentation_page (view, &area);
3202                         }
3203                                 return FALSE;
3204                         case EV_PRESENTATION_BLACK:
3205                         case EV_PRESENTATION_WHITE:
3206                                 return FALSE;
3207                         case EV_PRESENTATION_NORMAL:
3208                         default:
3209                                 break;
3210                 }
3211         } else if (view->loading) {
3212                 GdkRectangle area = {0};
3213
3214                 area.width = widget->allocation.width;
3215                 area.height = widget->allocation.height;
3216
3217                 draw_loading_text (view,
3218                                    &area,
3219                                    &(event->area));
3220         }
3221
3222         if (view->document == NULL)
3223                 return FALSE;
3224
3225         cr = gdk_cairo_create (view->layout.bin_window);
3226
3227         for (i = view->start_page; i >= 0 && i <= view->end_page; i++) {
3228                 GdkRectangle page_area;
3229                 GtkBorder border;
3230                 gboolean page_ready = TRUE;
3231
3232                 if (!get_page_extents (view, i, &page_area, &border))
3233                         continue;
3234
3235                 page_area.x -= view->scroll_x;
3236                 page_area.y -= view->scroll_y;
3237
3238                 draw_one_page (view, i, cr, &page_area, &border, &(event->area), &page_ready);
3239
3240                 if (page_ready && view->find_pages && view->highlight_find_results)
3241                         highlight_find_results (view, i);
3242                 if (page_ready && EV_IS_DOCUMENT_ANNOTATIONS (view->document))
3243                         show_annotation_windows (view, i);
3244         }
3245
3246         cairo_destroy (cr);
3247
3248         if (GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event)
3249                 (* GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event) (widget, event);
3250
3251         return FALSE;
3252 }
3253
3254 static gboolean
3255 ev_view_do_popup_menu (EvView *view,
3256                        gdouble x,
3257                        gdouble y)
3258 {
3259         EvLink       *link;
3260         EvImage      *image;
3261         EvAnnotation *annot;
3262
3263         image = ev_view_get_image_at_location (view, x, y);
3264         if (image) {
3265                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, image);
3266                 return TRUE;
3267         }
3268
3269         link = ev_view_get_link_at_location (view, x, y);
3270         if (link) {
3271                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
3272                 return TRUE;
3273         }
3274
3275         annot = ev_view_get_annotation_at_location (view, x, y);
3276         if (annot) {
3277                 g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, annot);
3278                 return TRUE;
3279         }
3280
3281         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, NULL);
3282
3283         return TRUE;
3284 }
3285
3286 static gboolean
3287 ev_view_popup_menu (GtkWidget *widget)
3288 {
3289         gint x, y;
3290
3291         gtk_widget_get_pointer (widget, &x, &y);
3292         return ev_view_do_popup_menu (EV_VIEW (widget), x, y);
3293 }
3294
3295 static void
3296 get_link_area (EvView       *view,
3297                gint          x,
3298                gint          y,
3299                EvLink       *link,
3300                GdkRectangle *area)
3301 {
3302         GList *link_mapping;
3303         gint   page;
3304         gint   x_offset = 0, y_offset = 0;
3305
3306         x += view->scroll_x;
3307         y += view->scroll_y;
3308
3309         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3310
3311         link_mapping = ev_page_cache_get_link_mapping (view->page_cache, page);
3312         ev_view_get_area_from_mapping (view, page,
3313                                        link_mapping,
3314                                        link, area);
3315 }
3316
3317 static void
3318 get_annot_area (EvView       *view,
3319                gint          x,
3320                gint          y,
3321                EvAnnotation *annot,
3322                GdkRectangle *area)
3323 {
3324         GList *annot_mapping;
3325         gint   page;
3326         gint   x_offset = 0, y_offset = 0;
3327
3328         x += view->scroll_x;
3329         y += view->scroll_y;
3330
3331         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
3332
3333         annot_mapping = ev_page_cache_get_annot_mapping (view->page_cache, page);
3334         ev_view_get_area_from_mapping (view, page,
3335                                        annot_mapping,
3336                                        annot, area);
3337 }
3338
3339 static gboolean
3340 ev_view_query_tooltip (GtkWidget  *widget,
3341                        gint        x,
3342                        gint        y,
3343                        gboolean    keyboard_tip,
3344                        GtkTooltip *tooltip)
3345 {
3346         EvView       *view = EV_VIEW (widget);
3347         EvLink       *link;
3348         EvAnnotation *annot;
3349         gchar        *text;
3350
3351         annot = ev_view_get_annotation_at_location (view, x, y);
3352         if (annot && annot->contents) {
3353                 GdkRectangle annot_area;
3354
3355                 get_annot_area (view, x, y, annot, &annot_area);
3356                 gtk_tooltip_set_text (tooltip, annot->contents);
3357                 gtk_tooltip_set_tip_area (tooltip, &annot_area);
3358
3359                 return TRUE;
3360         }
3361
3362         link = ev_view_get_link_at_location (view, x, y);
3363         if (!link)
3364                 return FALSE;
3365
3366         text = tip_from_link (view, link);
3367         if (text && g_utf8_validate (text, -1, NULL)) {
3368                 GdkRectangle link_area;
3369
3370                 get_link_area (view, x, y, link, &link_area);
3371                 gtk_tooltip_set_text (tooltip, text);
3372                 gtk_tooltip_set_tip_area (tooltip, &link_area);
3373         }
3374         g_free (text);
3375
3376         return TRUE;
3377 }
3378
3379 static void
3380 start_selection_for_event (EvView         *view,
3381                            GdkEventButton *event)
3382 {
3383         clear_selection (view);
3384
3385         view->selection_info.start.x = event->x + view->scroll_x;
3386         view->selection_info.start.y = event->y + view->scroll_y;
3387
3388         switch (event->type) {
3389                 case GDK_2BUTTON_PRESS:
3390                         view->selection_info.style = EV_SELECTION_STYLE_WORD;
3391                         break;
3392                 case GDK_3BUTTON_PRESS:
3393                         view->selection_info.style = EV_SELECTION_STYLE_LINE;
3394                         break;
3395                 default:
3396                         view->selection_info.style = EV_SELECTION_STYLE_GLYPH;
3397                         return;
3398         }
3399
3400         /* In case of WORD or LINE, compute selections now */
3401         compute_selections (view,
3402                             view->selection_info.style,
3403                             &(view->selection_info.start),
3404                             &(view->selection_info.start));
3405 }
3406
3407 static gboolean
3408 ev_view_button_press_event (GtkWidget      *widget,
3409                             GdkEventButton *event)
3410 {
3411         EvView *view = EV_VIEW (widget);
3412
3413         if (!view->document)
3414                 return FALSE;
3415
3416         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
3417                 gtk_widget_grab_focus (widget);
3418         }
3419
3420         if (view->window_child_focus) {
3421                 EvAnnotationWindow *window;
3422                 EvAnnotation       *annot;
3423
3424                 window = EV_ANNOTATION_WINDOW (view->window_child_focus->window);
3425                 annot = ev_annotation_window_get_annotation (window);
3426                 ev_annotation_window_ungrab_focus (window);
3427                 ev_view_annotation_save (view, annot);
3428                 view->window_child_focus = NULL;
3429         }
3430
3431         view->pressed_button = event->button;
3432         view->selection_info.in_drag = FALSE;
3433
3434         if (view->presentation)
3435                 return FALSE;
3436
3437         if (view->scroll_info.autoscrolling)
3438                 return TRUE;
3439
3440         switch (event->button) {
3441                 case 1: {
3442                         EvImage *image;
3443                         EvAnnotation *annot;
3444                         EvFormField *field;
3445
3446                         if (EV_IS_SELECTION (view->document) && view->selection_info.selections) {
3447                                 if (event->type == GDK_3BUTTON_PRESS) {
3448                                         start_selection_for_event (view, event);
3449                                 } else if (location_in_selected_text (view,
3450                                                                event->x + view->scroll_x,
3451                                                                event->y + view->scroll_y)) {
3452                                         view->selection_info.in_drag = TRUE;
3453                                 } else {
3454                                         start_selection_for_event (view, event);
3455                                 }
3456
3457                                 gtk_widget_queue_draw (widget);
3458                         } else if ((annot = ev_view_get_annotation_at_location (view, event->x, event->y))) {
3459                                 ev_view_handle_annotation (view, annot, event->x, event->y, event->time);
3460                         } else if ((field = ev_view_get_form_field_at_location (view, event->x, event->y))) {
3461                                 ev_view_remove_all (view);
3462                                 ev_view_handle_form_field (view, field, event->x, event->y);
3463                         } else if (!location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y) &&
3464                                    (image = ev_view_get_image_at_location (view, event->x, event->y))) {
3465                                 if (view->image_dnd_info.image)
3466                                         g_object_unref (view->image_dnd_info.image);
3467                                 view->image_dnd_info.image = g_object_ref (image);
3468                                 view->image_dnd_info.in_drag = TRUE;
3469
3470                                 view->image_dnd_info.start.x = event->x + view->scroll_x;
3471                                 view->image_dnd_info.start.y = event->y + view->scroll_y;
3472                         } else {
3473                                 ev_view_remove_all (view);
3474
3475                                 if (EV_IS_SELECTION (view->document))
3476                                         start_selection_for_event (view, event);
3477                         }
3478                 }
3479                         return TRUE;
3480                 case 2:
3481                         /* use root coordinates as reference point because
3482                          * scrolling changes window relative coordinates */
3483                         view->drag_info.start.x = event->x_root;
3484                         view->drag_info.start.y = event->y_root;
3485                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
3486                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
3487
3488                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
3489
3490                         return TRUE;
3491                 case 3:
3492                         view->scroll_info.start_y = event->y;
3493                         return ev_view_do_popup_menu (view, event->x, event->y);
3494         }
3495
3496         return FALSE;
3497 }
3498
3499 static void
3500 ev_view_remove_all (EvView *view)
3501 {
3502         GList *children, *child;
3503
3504         children = gtk_container_get_children (GTK_CONTAINER (view));
3505         for (child = children; child && child->data; child = g_list_next (child)) {
3506                 gtk_container_remove (GTK_CONTAINER (view),
3507                                       GTK_WIDGET (child->data));
3508         }
3509         g_list_free (children);
3510 }
3511
3512 /*** Drag and Drop ***/
3513 static void
3514 ev_view_drag_data_get (GtkWidget        *widget,
3515                        GdkDragContext   *context,
3516                        GtkSelectionData *selection_data,
3517                        guint             info,
3518                        guint             time)
3519 {
3520         EvView *view = EV_VIEW (widget);
3521
3522         switch (info) {
3523                 case TARGET_DND_TEXT:
3524                         if (EV_IS_SELECTION (view->document) &&
3525                             view->selection_info.selections) {
3526                                 gchar *text;
3527
3528                                 text = get_selected_text (view);
3529                                 gtk_selection_data_set_text (selection_data,
3530                                                              text,
3531                                                              strlen (text));
3532                                 g_free (text);
3533                         }
3534                         break;
3535                 case TARGET_DND_IMAGE:
3536                         if (view->image_dnd_info.image) {
3537                                 GdkPixbuf *pixbuf;
3538
3539                                 ev_document_doc_mutex_lock ();
3540                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3541                                                                        view->image_dnd_info.image);
3542                                 ev_document_doc_mutex_unlock ();
3543
3544                                 gtk_selection_data_set_pixbuf (selection_data, pixbuf);
3545                                 g_object_unref (pixbuf);
3546                         }
3547                         break;
3548                 case TARGET_DND_URI:
3549                         if (view->image_dnd_info.image) {
3550                                 GdkPixbuf   *pixbuf;
3551                                 const gchar *tmp_uri;
3552                                 gchar       *uris[2];
3553
3554                                 ev_document_doc_mutex_lock ();
3555                                 pixbuf = ev_document_images_get_image (EV_DOCUMENT_IMAGES (view->document),
3556                                                                        view->image_dnd_info.image);
3557                                 ev_document_doc_mutex_unlock ();
3558
3559                                 tmp_uri = ev_image_save_tmp (view->image_dnd_info.image, pixbuf);
3560                                 g_object_unref (pixbuf);
3561
3562                                 uris[0] = (gchar *)tmp_uri;
3563                                 uris[1] = NULL;
3564                                 gtk_selection_data_set_uris (selection_data, uris);
3565                         }
3566         }
3567 }
3568
3569 static gboolean
3570 ev_view_drag_motion (GtkWidget      *widget,
3571                      GdkDragContext *context,
3572                      gint            x,
3573                      gint            y,
3574                      guint           time)
3575 {
3576         if (gtk_drag_get_source_widget (context) == widget)
3577                 gdk_drag_status (context, 0, time);
3578         else
3579                 gdk_drag_status (context, context->suggested_action, time);
3580
3581         return TRUE;
3582 }
3583
3584 static gboolean
3585 selection_update_idle_cb (EvView *view)
3586 {
3587         compute_selections (view,
3588                             view->selection_info.style,
3589                             &view->selection_info.start,
3590                             &view->motion);
3591         view->selection_update_id = 0;
3592         return FALSE;
3593 }
3594
3595 static gboolean
3596 selection_scroll_timeout_cb (EvView *view)
3597 {
3598         gint x, y, shift = 0;
3599         GtkWidget *widget = GTK_WIDGET (view);
3600
3601         gtk_widget_get_pointer (widget, &x, &y);
3602
3603         if (y > widget->allocation.height) {
3604                 shift = (y - widget->allocation.height) / 2;
3605         } else if (y < 0) {
3606                 shift = y / 2;
3607         }
3608
3609         if (shift)
3610                 gtk_adjustment_set_value (view->vadjustment,
3611                                           CLAMP (view->vadjustment->value + shift,
3612                                           view->vadjustment->lower,
3613                                           view->vadjustment->upper -
3614                                           view->vadjustment->page_size));
3615
3616         if (x > widget->allocation.width) {
3617                 shift = (x - widget->allocation.width) / 2;
3618         } else if (x < 0) {
3619                 shift = x / 2;
3620         }
3621
3622         if (shift)
3623                 gtk_adjustment_set_value (view->hadjustment,
3624                                           CLAMP (view->hadjustment->value + shift,
3625                                           view->hadjustment->lower,
3626                                           view->hadjustment->upper -
3627                                           view->hadjustment->page_size));
3628
3629         return TRUE;
3630 }
3631
3632 static gboolean
3633 ev_view_drag_update_momentum (EvView *view)
3634 {
3635         int i;
3636         if (!view->drag_info.in_drag)
3637                 return FALSE;
3638
3639         for (i = DRAG_HISTORY - 1; i > 0; i--) {
3640                 view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x;
3641                 view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y;
3642         }
3643
3644         /* Momentum is a moving average of 10ms granularity over
3645          * the last 100ms with each 10ms stored in buffer.
3646          */
3647
3648         view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x);
3649         view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y);
3650
3651         return TRUE;
3652 }
3653
3654 static gboolean
3655 ev_view_scroll_drag_release (EvView *view)
3656 {
3657         gdouble dhadj_value, dvadj_value;
3658         gdouble oldhadjustment, oldvadjustment;
3659
3660         view->drag_info.momentum.x /= 1.2;
3661         view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */
3662
3663         dhadj_value = view->hadjustment->page_size *
3664                       (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width;
3665         dvadj_value = view->vadjustment->page_size *
3666                       (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height;
3667
3668         oldhadjustment = gtk_adjustment_get_value (view->hadjustment);
3669         oldvadjustment = gtk_adjustment_get_value (view->vadjustment);
3670
3671      /* When we reach the edges, we need either to absorb some momentum and bounce by
3672       * multiplying it on -0.5 or stop scrolling by setting momentum to 0. */
3673      if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) ||
3674            ((oldhadjustment + dhadj_value) < 0))
3675                 view->drag_info.momentum.x = 0;
3676         if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) ||
3677            ((oldvadjustment + dvadj_value) < 0))
3678                 view->drag_info.momentum.y = 0;
3679
3680         gtk_adjustment_set_value (view->hadjustment,
3681                                 MIN (oldhadjustment + dhadj_value,
3682                                 view->hadjustment->upper - view->hadjustment->page_size));
3683         gtk_adjustment_set_value (view->vadjustment,
3684                                 MIN (oldvadjustment + dvadj_value,
3685                                 view->vadjustment->upper - view->vadjustment->page_size));
3686
3687         if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) &&
3688            ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1)))
3689                 return FALSE;
3690         else
3691                 return TRUE;
3692 }
3693
3694 static gboolean
3695 ev_view_motion_notify_event (GtkWidget      *widget,
3696                              GdkEventMotion *event)
3697 {
3698         EvView *view = EV_VIEW (widget);
3699         gint x, y;
3700
3701         if (!view->document)
3702                 return FALSE;
3703
3704         if (event->is_hint || event->window != view->layout.bin_window) {
3705             gtk_widget_get_pointer (widget, &x, &y);
3706         } else {
3707             x = event->x;
3708             y = event->y;
3709         }
3710
3711         if (view->presentation) {
3712                 ev_view_handle_cursor_over_xy (view, x, y);
3713                 return FALSE;
3714         }
3715
3716         if (view->scroll_info.autoscrolling) {
3717                 view->scroll_info.last_y = y;
3718                 return TRUE;
3719         }
3720
3721         if (view->selection_info.in_drag) {
3722                 if (gtk_drag_check_threshold (widget,
3723                                               view->selection_info.start.x,
3724                                               view->selection_info.start.y,
3725                                               x, y)) {
3726                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3727
3728                         gtk_target_list_add_text_targets (target_list, TARGET_DND_TEXT);
3729
3730                         gtk_drag_begin (widget, target_list,
3731                                         GDK_ACTION_COPY,
3732                                         1, (GdkEvent *)event);
3733
3734                         view->selection_info.in_drag = FALSE;
3735
3736                         gtk_target_list_unref (target_list);
3737
3738                         return TRUE;
3739                 }
3740         } else if (view->image_dnd_info.in_drag) {
3741                 if (gtk_drag_check_threshold (widget,
3742                                               view->selection_info.start.x,
3743                                               view->selection_info.start.y,
3744                                               x, y)) {
3745                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
3746
3747                         gtk_target_list_add_uri_targets (target_list, TARGET_DND_URI);
3748                         gtk_target_list_add_image_targets (target_list, TARGET_DND_IMAGE, TRUE);
3749
3750                         gtk_drag_begin (widget, target_list,
3751                                         GDK_ACTION_COPY,
3752                                         1, (GdkEvent *)event);
3753
3754                         view->image_dnd_info.in_drag = FALSE;
3755
3756                         gtk_target_list_unref (target_list);
3757
3758                         return TRUE;
3759                 }
3760         }
3761
3762         switch (view->pressed_button) {
3763         case 1:
3764                 /* For the Evince 0.4.x release, we limit selection to un-rotated
3765                  * documents only.
3766                  */
3767                 if (view->rotation != 0)
3768                         return FALSE;
3769
3770                 /* Schedule timeout to scroll during selection and additionally
3771                  * scroll once to allow arbitrary speed. */
3772                 if (!view->selection_scroll_id)
3773                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME,
3774                                                                (GSourceFunc)selection_scroll_timeout_cb,
3775                                                                view);
3776                 else
3777                     selection_scroll_timeout_cb (view);
3778
3779                 view->selection_info.in_selection = TRUE;
3780                 view->motion.x = x + view->scroll_x;
3781                 view->motion.y = y + view->scroll_y;
3782
3783                 /* Queue an idle to handle the motion.  We do this because
3784                  * handling any selection events in the motion could be slower
3785                  * than new motion events reach us.  We always put it in the
3786                  * idle to make sure we catch up and don't visibly lag the
3787                  * mouse. */
3788                 if (!view->selection_update_id)
3789                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
3790
3791                 return TRUE;
3792         case 2:
3793                 if (!view->drag_info.in_drag) {
3794                         gboolean start;
3795                         int i;
3796
3797                         start = gtk_drag_check_threshold (widget,
3798                                                           view->drag_info.start.x,
3799                                                           view->drag_info.start.y,
3800                                                           event->x_root,
3801                                                           event->y_root);
3802                         view->drag_info.in_drag = start;
3803                         view->drag_info.drag_timeout_id = g_timeout_add (10,
3804                                 (GSourceFunc)ev_view_drag_update_momentum, view);
3805                         /* Set 100 to choose how long it takes to build up momentum */
3806                         /* Clear out previous momentum info: */
3807                         for (i = 0; i < DRAG_HISTORY; i++) {
3808                                 view->drag_info.buffer[i].x = event->x;
3809                                 view->drag_info.buffer[i].y = event->y;
3810                         }
3811                         view->drag_info.momentum.x = 0;
3812                         view->drag_info.momentum.y = 0;
3813                 }
3814
3815                 if (view->drag_info.in_drag) {
3816                         int dx, dy;
3817                         gdouble dhadj_value, dvadj_value;
3818
3819                         view->drag_info.buffer[0].x = event->x;
3820                         view->drag_info.buffer[0].y = event->y;
3821
3822                         dx = event->x_root - view->drag_info.start.x;
3823                         dy = event->y_root - view->drag_info.start.y;
3824
3825                         dhadj_value = view->hadjustment->page_size *
3826                                       (gdouble)dx / widget->allocation.width;
3827                         dvadj_value = view->vadjustment->page_size *
3828                                       (gdouble)dy / widget->allocation.height;
3829
3830                         /* clamp scrolling to visible area */
3831                         gtk_adjustment_set_value (view->hadjustment,
3832                                                   MIN(view->drag_info.hadj - dhadj_value,
3833                                                       view->hadjustment->upper -
3834                                                       view->hadjustment->page_size));
3835                         gtk_adjustment_set_value (view->vadjustment,
3836                                                   MIN(view->drag_info.vadj - dvadj_value,
3837                                                       view->vadjustment->upper -
3838                                                       view->vadjustment->page_size));
3839
3840                         return TRUE;
3841                 }
3842
3843                 break;
3844         default:
3845                 ev_view_handle_cursor_over_xy (view, x, y);
3846         }
3847
3848         return FALSE;
3849 }
3850
3851 static gboolean
3852 ev_view_button_release_event (GtkWidget      *widget,
3853                               GdkEventButton *event)
3854 {
3855         EvView *view = EV_VIEW (widget);
3856         EvLink *link = NULL;
3857
3858         view->image_dnd_info.in_drag = FALSE;
3859
3860         if (view->scroll_info.autoscrolling) {
3861                 ev_view_autoscroll_stop (view);
3862                 view->pressed_button = -1;
3863
3864                 return TRUE;
3865         }
3866
3867         if (view->drag_info.in_drag) {
3868                 view->drag_info.release_timeout_id =
3869                         g_timeout_add (20,
3870                                        (GSourceFunc)ev_view_scroll_drag_release, view);
3871         }
3872
3873         if (view->document && !view->drag_info.in_drag && view->pressed_button != 3) {
3874                 link = ev_view_get_link_at_location (view, event->x, event->y);
3875         }
3876
3877         view->drag_info.in_drag = FALSE;
3878
3879         if (view->presentation) {
3880                 view->pressed_button = -1;
3881
3882                 switch (event->button) {
3883                 case 1:
3884                         if (link)
3885                                 ev_view_handle_link (view, link);
3886                         else
3887                                 ev_view_next_page (view);
3888                         break;
3889                 case 3:
3890                         ev_view_previous_page (view);
3891                 }
3892
3893                 return FALSE;
3894         }
3895
3896         if (view->pressed_button == 2) {
3897                 ev_view_handle_cursor_over_xy (view, event->x, event->y);
3898         }
3899
3900         view->pressed_button = -1;
3901
3902         if (view->selection_scroll_id) {
3903             g_source_remove (view->selection_scroll_id);
3904             view->selection_scroll_id = 0;
3905         }
3906         if (view->selection_update_id) {
3907             g_source_remove (view->selection_update_id);
3908             view->selection_update_id = 0;
3909         }
3910
3911         if (view->selection_info.selections) {
3912                 clear_link_selected (view);
3913                 ev_view_update_primary_selection (view);
3914
3915                 if (view->selection_info.in_drag) {
3916                         clear_selection (view);
3917                         gtk_widget_queue_draw (widget);
3918                 }
3919
3920                 view->selection_info.in_drag = FALSE;
3921         } else if (link) {
3922                 if (event->button == 2) {
3923                         EvLinkAction    *action;
3924                         EvLinkActionType type;
3925
3926                         action = ev_link_get_action (link);
3927                         if (!action)
3928                                 return FALSE;
3929
3930                         type = ev_link_action_get_action_type (action);
3931                         if (type == EV_LINK_ACTION_TYPE_GOTO_DEST) {
3932                                 g_signal_emit (view,
3933                                                signals[SIGNAL_EXTERNAL_LINK],
3934                                                0, action);
3935                         }
3936                 } else {
3937                         ev_view_handle_link (view, link);
3938                 }
3939         } else if (view->presentation) {
3940                 switch (event->button) {
3941                         case 1:
3942                                 ev_view_next_page (view);
3943                                 return TRUE;
3944                         case 3:
3945                                 ev_view_previous_page (view);
3946                                 return TRUE;
3947                 }
3948         }
3949
3950         return FALSE;
3951 }
3952
3953 /* Goto Window */
3954 /* Cut and paste from gtkwindow.c */
3955 static void
3956 send_focus_change (GtkWidget *widget,
3957                    gboolean   in)
3958 {
3959         GdkEvent *fevent = gdk_event_new (GDK_FOCUS_CHANGE);
3960
3961         g_object_ref (widget);
3962
3963         if (in)
3964                 GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
3965         else
3966                 GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
3967
3968         fevent->focus_change.type = GDK_FOCUS_CHANGE;
3969         fevent->focus_change.window = g_object_ref (widget->window);
3970         fevent->focus_change.in = in;
3971
3972         gtk_widget_event (widget, fevent);
3973
3974         g_object_notify (G_OBJECT (widget), "has-focus");
3975
3976         g_object_unref (widget);
3977         gdk_event_free (fevent);
3978 }
3979
3980 static void
3981 ev_view_goto_window_hide (EvView *view)
3982 {
3983         /* send focus-in event */
3984         send_focus_change (view->goto_entry, FALSE);
3985         gtk_widget_hide (view->goto_window);
3986         gtk_entry_set_text (GTK_ENTRY (view->goto_entry), "");
3987 }
3988
3989 static gboolean
3990 ev_view_goto_window_delete_event (GtkWidget   *widget,
3991                                   GdkEventAny *event,
3992                                   EvView      *view)
3993 {
3994         ev_view_goto_window_hide (view);
3995
3996         return TRUE;
3997 }
3998
3999 static gboolean
4000 key_is_numeric (guint keyval)
4001 {
4002         return ((keyval >= GDK_0 && keyval <= GDK_9) ||
4003                 (keyval >= GDK_KP_0 && keyval <= GDK_KP_9));
4004 }
4005
4006 static gboolean
4007 ev_view_goto_window_key_press_event (GtkWidget   *widget,
4008                                      GdkEventKey *event,
4009                                      EvView      *view)
4010 {
4011         switch (event->keyval) {
4012                 case GDK_Escape:
4013                 case GDK_Tab:
4014                 case GDK_KP_Tab:
4015                 case GDK_ISO_Left_Tab:
4016                         ev_view_goto_window_hide (view);
4017                         return TRUE;
4018                 case GDK_Return:
4019                 case GDK_KP_Enter:
4020                 case GDK_ISO_Enter:
4021                 case GDK_BackSpace:
4022                 case GDK_Delete:
4023                         return FALSE;
4024                 default:
4025                         if (!key_is_numeric (event->keyval))
4026                                 return TRUE;
4027         }
4028
4029         return FALSE;
4030 }
4031
4032 static gboolean
4033 ev_view_goto_window_button_press_event (GtkWidget      *widget,
4034                                         GdkEventButton *event,
4035                                         EvView         *view)
4036 {
4037         ev_view_goto_window_hide (view);
4038
4039         return TRUE;
4040 }
4041
4042 static void
4043 ev_view_goto_entry_activate (GtkEntry *entry,
4044                              EvView   *view)
4045 {
4046         const gchar *text;
4047         gint         page;
4048
4049         text = gtk_entry_get_text (entry);
4050         page = atoi (text) - 1;
4051
4052         ev_view_goto_window_hide (view);
4053
4054         if (page >= 0 && page < ev_document_get_n_pages (view->document)) {
4055                 ev_document_model_set_page (view->model, page);
4056         }
4057 }
4058
4059 static void
4060 ev_view_goto_window_create (EvView *view)
4061 {
4062         GtkWidget *frame, *hbox, *toplevel, *label;
4063
4064         toplevel = gtk_widget_get_toplevel (GTK_WIDGET (view));
4065
4066         if (view->goto_window) {
4067                 if (GTK_WINDOW (toplevel)->group)
4068                         gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4069                                                      GTK_WINDOW (view->goto_window));
4070                 else if (GTK_WINDOW (view->goto_window)->group)
4071                         gtk_window_group_remove_window (GTK_WINDOW (view->goto_window)->group,
4072                                                         GTK_WINDOW (view->goto_window));
4073                 return;
4074         }
4075
4076         view->goto_window = gtk_window_new (GTK_WINDOW_POPUP);
4077         gtk_window_set_screen (GTK_WINDOW (view->goto_window),
4078                                gtk_widget_get_screen (GTK_WIDGET (view)));
4079
4080         if (GTK_WINDOW (toplevel)->group)
4081                 gtk_window_group_add_window (GTK_WINDOW (toplevel)->group,
4082                                              GTK_WINDOW (view->goto_window));
4083
4084         gtk_window_set_modal (GTK_WINDOW (view->goto_window), TRUE);
4085
4086         g_signal_connect (view->goto_window, "delete_event",
4087                           G_CALLBACK (ev_view_goto_window_delete_event),
4088                           view);
4089         g_signal_connect (view->goto_window, "key_press_event",
4090                           G_CALLBACK (ev_view_goto_window_key_press_event),
4091                           view);
4092         g_signal_connect (view->goto_window, "button_press_event",
4093                           G_CALLBACK (ev_view_goto_window_button_press_event),
4094                           view);
4095
4096         frame = gtk_frame_new (NULL);
4097         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
4098         gtk_container_add (GTK_CONTAINER (view->goto_window), frame);
4099         gtk_widget_show (frame);
4100
4101         hbox = gtk_hbox_new (FALSE, 0);
4102         gtk_container_set_border_width (GTK_CONTAINER (hbox), 3);
4103         gtk_container_add (GTK_CONTAINER (frame), hbox);
4104         gtk_widget_show (hbox);
4105
4106         label = gtk_label_new(_("Jump to page:"));
4107         gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 3);
4108         gtk_widget_show (label);
4109         gtk_widget_realize (label);
4110
4111         view->goto_entry = gtk_entry_new ();
4112         g_signal_connect (view->goto_entry, "activate",
4113                           G_CALLBACK (ev_view_goto_entry_activate),
4114                           view);
4115         gtk_box_pack_start (GTK_BOX (hbox), view->goto_entry, TRUE, TRUE, 0);
4116         gtk_widget_show (view->goto_entry);
4117         gtk_widget_realize (view->goto_entry);
4118 }
4119
4120 static void
4121 ev_view_goto_entry_grab_focus (EvView *view)
4122 {
4123         GtkWidgetClass *entry_parent_class;
4124
4125         entry_parent_class = g_type_class_peek_parent (GTK_ENTRY_GET_CLASS (view->goto_entry));
4126         (entry_parent_class->grab_focus) (view->goto_entry);
4127
4128         send_focus_change (view->goto_entry, TRUE);
4129 }
4130
4131 static void
4132 ev_view_goto_window_send_key_event (EvView   *view,
4133                                     GdkEvent *event)
4134 {
4135         GdkEventKey *new_event;
4136         GdkScreen   *screen;
4137
4138         /* Move goto window off screen */
4139         screen = gtk_widget_get_screen (GTK_WIDGET (view));
4140         gtk_window_move (GTK_WINDOW (view->goto_window),
4141                          gdk_screen_get_width (screen) + 1,
4142                          gdk_screen_get_height (screen) + 1);
4143         gtk_widget_show (view->goto_window);
4144
4145         new_event = (GdkEventKey *) gdk_event_copy (event);
4146         g_object_unref (new_event->window);
4147         new_event->window = g_object_ref (view->goto_window->window);
4148         gtk_widget_realize (view->goto_window);
4149
4150         gtk_widget_event (view->goto_window, (GdkEvent *)new_event);
4151         gdk_event_free ((GdkEvent *)new_event);
4152         gtk_widget_hide (view->goto_window);
4153 }
4154
4155 static gboolean
4156 ev_view_key_press_event (GtkWidget   *widget,
4157                          GdkEventKey *event)
4158 {
4159         EvView *view = EV_VIEW (widget);
4160         EvPresentationState current;
4161
4162         if (!view->document)
4163                 return FALSE;
4164
4165         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
4166                 /* Forward key events to current focused window child */
4167                 if (view->window_child_focus) {
4168                         GdkEventKey *new_event;
4169                         gboolean     handled;
4170
4171                         new_event = (GdkEventKey *) gdk_event_copy ((GdkEvent *)event);
4172                         g_object_unref (new_event->window);
4173                         new_event->window = g_object_ref (view->window_child_focus->window->window);
4174                         gtk_widget_realize (view->window_child_focus->window);
4175                         handled = gtk_widget_event (view->window_child_focus->window, (GdkEvent *)new_event);
4176                         gdk_event_free ((GdkEvent *)new_event);
4177
4178                         return handled;
4179                 }
4180
4181                 return FALSE;
4182         }
4183
4184         if (!view->presentation ||
4185             view->presentation_state == EV_PRESENTATION_END)
4186                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4187
4188
4189         current = view->presentation_state;
4190
4191         switch (event->keyval) {
4192                 case GDK_b:
4193                 case GDK_B:
4194                 case GDK_period:
4195                 case GDK_KP_Decimal:
4196                         view->presentation_state =
4197                                 (view->presentation_state == EV_PRESENTATION_BLACK) ?
4198                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_BLACK;
4199                         break;
4200                 case GDK_w:
4201                 case GDK_W:
4202                         view->presentation_state =
4203                                 (view->presentation_state == EV_PRESENTATION_WHITE) ?
4204                                 EV_PRESENTATION_NORMAL : EV_PRESENTATION_WHITE;
4205                         break;
4206                 default:
4207                         if (view->presentation_state == EV_PRESENTATION_BLACK ||
4208                             view->presentation_state == EV_PRESENTATION_WHITE) {
4209                                 view->presentation_state = EV_PRESENTATION_NORMAL;
4210                         }
4211         }
4212
4213         if (current == view->presentation_state) {
4214                 if (ev_document_get_n_pages (view->document) > 1 &&
4215                     key_is_numeric (event->keyval)) {
4216                         gint x, y;
4217
4218                         ev_view_goto_window_create (view);
4219                         ev_view_goto_window_send_key_event (view, (GdkEvent *)event);
4220                         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4221                         gtk_window_move (GTK_WINDOW (view->goto_window), x, y);
4222                         gtk_widget_show (view->goto_window);
4223                         ev_view_goto_entry_grab_focus (view);
4224
4225                         return TRUE;
4226                 }
4227
4228                 return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4229         }
4230
4231         switch (view->presentation_state) {
4232                 case EV_PRESENTATION_NORMAL:
4233                 case EV_PRESENTATION_BLACK:
4234                         gdk_window_set_background (view->layout.bin_window,
4235                                                    &widget->style->black);
4236                         break;
4237                 case EV_PRESENTATION_WHITE:
4238                         gdk_window_set_background (view->layout.bin_window,
4239                                                    &widget->style->white);
4240                         break;
4241                 default:
4242                         return gtk_bindings_activate_event (GTK_OBJECT (widget), event);
4243         }
4244
4245         gtk_widget_queue_draw (widget);
4246         return TRUE;
4247 }
4248
4249 static gint
4250 ev_view_focus_in (GtkWidget     *widget,
4251                   GdkEventFocus *event)
4252 {
4253         if (EV_VIEW (widget)->pixbuf_cache)
4254                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4255         gtk_widget_queue_draw (widget);
4256
4257         return FALSE;
4258 }
4259
4260 static gint
4261 ev_view_focus_out (GtkWidget     *widget,
4262                      GdkEventFocus *event)
4263 {
4264         if (EV_VIEW (widget)->goto_window)
4265                 ev_view_goto_window_hide (EV_VIEW (widget));
4266
4267         if (EV_VIEW (widget)->pixbuf_cache)
4268                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4269         gtk_widget_queue_draw (widget);
4270
4271         return FALSE;
4272 }
4273
4274 static gboolean
4275 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4276 {
4277         EvView *view = EV_VIEW (widget);
4278
4279         if (view->cursor != EV_VIEW_CURSOR_NORMAL)
4280                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
4281
4282         return FALSE;
4283 }
4284
4285 static gboolean
4286 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
4287 {
4288         EvView *view = EV_VIEW (widget);
4289
4290         ev_view_handle_cursor_over_xy (view, event->x, event->y);
4291
4292         return FALSE;
4293 }
4294
4295 static void
4296 ev_view_style_set (GtkWidget *widget,
4297                    GtkStyle  *old_style)
4298 {
4299         if (EV_VIEW (widget)->pixbuf_cache)
4300                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
4301
4302         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
4303 }
4304
4305 /*** Drawing ***/
4306
4307 static guint32
4308 ev_gdk_color_to_rgb (const GdkColor *color)
4309 {
4310   guint32 result;
4311   result = (0xff0000 | (color->red & 0xff00));
4312   result <<= 8;
4313   result |= ((color->green & 0xff00) | (color->blue >> 8));
4314   return result;
4315 }
4316
4317 static void
4318 draw_rubberband (GtkWidget *widget, GdkWindow *window,
4319                  const GdkRectangle *rect, guchar alpha)
4320 {
4321         GdkGC *gc;
4322         GdkPixbuf *pixbuf;
4323         GdkColor *fill_color_gdk;
4324         guint fill_color;
4325
4326         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
4327         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
4328
4329         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
4330                                  rect->width, rect->height);
4331         gdk_pixbuf_fill (pixbuf, fill_color);
4332
4333         gdk_draw_pixbuf (window, NULL, pixbuf,
4334                          0, 0,
4335                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4336                          rect->width, rect->height,
4337                          GDK_RGB_DITHER_NONE,
4338                          0, 0);
4339
4340         g_object_unref (pixbuf);
4341
4342         gc = gdk_gc_new (window);
4343         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
4344         gdk_draw_rectangle (window, gc, FALSE,
4345                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
4346                             rect->width - 1,
4347                             rect->height - 1);
4348         g_object_unref (gc);
4349
4350         gdk_color_free (fill_color_gdk);
4351 }
4352
4353
4354 static void
4355 highlight_find_results (EvView *view, int page)
4356 {
4357         gint i, n_results = 0;
4358
4359         n_results = ev_view_find_get_n_results (view, page);
4360
4361         for (i = 0; i < n_results; i++) {
4362                 EvRectangle *rectangle;
4363                 GdkRectangle view_rectangle;
4364                 guchar alpha;
4365
4366                 if (i == view->find_result && page == view->current_page) {
4367                         alpha = 0x90;
4368                 } else {
4369                         alpha = 0x20;
4370                 }
4371
4372                 rectangle = ev_view_find_get_result (view, page, i);
4373                 doc_rect_to_view_rect (view, page, rectangle, &view_rectangle);
4374                 draw_rubberband (GTK_WIDGET (view), view->layout.bin_window,
4375                                  &view_rectangle, alpha);
4376         }
4377 }
4378
4379 static void
4380 draw_loading_text (EvView       *view,
4381                    GdkRectangle *page_area,
4382                    GdkRectangle *expose_area)
4383 {
4384         cairo_t *cr;
4385         gint     width, height;
4386
4387         if (!view->loading_text) {
4388                 const gchar *loading_text = _("Loading...");
4389                 PangoLayout *layout;
4390                 PangoFontDescription *font_desc;
4391                 PangoRectangle logical_rect;
4392                 gint target_width;
4393                 gdouble real_scale;
4394
4395                 ev_document_fc_mutex_lock ();
4396
4397                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
4398
4399                 font_desc = pango_font_description_new ();
4400
4401                 /* We set the font to be 10 points, get the size, and scale appropriately */
4402                 pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
4403                 pango_layout_set_font_description (layout, font_desc);
4404                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4405
4406                 target_width = MAX (page_area->width / 2, 1);
4407                 real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
4408                 pango_font_description_set_size (font_desc, (int)real_scale);
4409                 pango_layout_set_font_description (layout, font_desc);
4410                 pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
4411
4412                 view->loading_text = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
4413                                                                  logical_rect.width,
4414                                                                  logical_rect.height);
4415                 cr = cairo_create (view->loading_text);
4416                 cairo_set_source_rgb (cr,
4417                                       155 / (double)255,
4418                                       155 / (double)255,
4419                                       155 / (double)255);
4420                 pango_cairo_show_layout (cr, layout);
4421                 cairo_destroy (cr);
4422
4423                 pango_font_description_free (font_desc);
4424                 g_object_unref (layout);
4425
4426                 ev_document_fc_mutex_unlock ();
4427         }
4428
4429         width = (page_area->width - cairo_image_surface_get_width (view->loading_text)) / 2;
4430         height = (page_area->height - cairo_image_surface_get_height (view->loading_text)) / 2;
4431
4432         cr = gdk_cairo_create (view->layout.bin_window);
4433         cairo_translate (cr,
4434                          page_area->x + width,
4435                          page_area->y + height);
4436         cairo_set_source_surface (cr, view->loading_text, 0, 0);
4437         cairo_paint (cr);
4438         cairo_destroy (cr);
4439 }
4440
4441 static void
4442 draw_one_page (EvView       *view,
4443                gint          page,
4444                cairo_t      *cr,
4445                GdkRectangle *page_area,
4446                GtkBorder    *border,
4447                GdkRectangle *expose_area,
4448                gboolean     *page_ready)
4449 {
4450         GdkRectangle overlap;
4451         GdkRectangle real_page_area;
4452
4453         g_assert (view->document);
4454
4455         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
4456                 return;
4457
4458         /* Render the document itself */
4459         real_page_area = *page_area;
4460
4461         real_page_area.x += border->left;
4462         real_page_area.y += border->top;
4463         real_page_area.width -= (border->left + border->right);
4464         real_page_area.height -= (border->top + border->bottom);
4465         *page_ready = TRUE;
4466
4467         if (!view->presentation) {
4468                 gint current_page;
4469
4470                 current_page = ev_document_model_get_page (view->model);
4471                 ev_document_misc_paint_one_page (view->layout.bin_window,
4472                                                  GTK_WIDGET (view),
4473                                                  page_area, border,
4474                                                  page == current_page);
4475         }
4476
4477         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
4478                 gint             width, height;
4479                 gint             page_width, page_height;
4480                 cairo_surface_t *page_surface = NULL;
4481                 gint             selection_width, selection_height;
4482                 cairo_surface_t *selection_surface = NULL;
4483
4484                 page_surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, page);
4485
4486                 if (!page_surface) {
4487                         if (!view->presentation) {
4488                                 draw_loading_text (view,
4489                                                    &real_page_area,
4490                                                    expose_area);
4491                         }
4492
4493                         *page_ready = FALSE;
4494
4495                         return;
4496                 }
4497
4498                 ev_view_get_page_size (view, page, &width, &height);
4499
4500                 page_width = cairo_image_surface_get_width (page_surface);
4501                 page_height = cairo_image_surface_get_height (page_surface);
4502
4503                 cairo_save (cr);
4504                 cairo_translate (cr, overlap.x, overlap.y);
4505
4506                 if (width != page_width || height != page_height) {
4507                         cairo_pattern_set_filter (cairo_get_source (cr),
4508                                                   CAIRO_FILTER_FAST);
4509                         cairo_scale (cr,
4510                                      (gdouble)width / page_width,
4511                                      (gdouble)height / page_height);
4512                 }
4513
4514                 cairo_surface_set_device_offset (page_surface,
4515                                                  overlap.x - real_page_area.x,
4516                                                  overlap.y - real_page_area.y);
4517                 cairo_set_source_surface (cr, page_surface, 0, 0);
4518                 cairo_paint (cr);
4519                 cairo_restore (cr);
4520
4521                 /* Get the selection pixbuf iff we have something to draw */
4522                 if (find_selection_for_page (view, page) &&
4523                     view->selection_mode == EV_VIEW_SELECTION_TEXT) {
4524                         selection_surface =
4525                                 ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
4526                                                                        page,
4527                                                                        view->scale,
4528                                                                        NULL);
4529                 }
4530
4531                 if (!selection_surface) {
4532                         return;
4533                 }
4534
4535                 selection_width = cairo_image_surface_get_width (selection_surface);
4536                 selection_height = cairo_image_surface_get_height (selection_surface);
4537
4538                 cairo_save (cr);
4539                 cairo_translate (cr, overlap.x, overlap.y);
4540
4541                 if (width != selection_width || height != selection_height) {
4542                         cairo_pattern_set_filter (cairo_get_source (cr),
4543                                                   CAIRO_FILTER_FAST);
4544                         cairo_scale (cr,
4545                                      (gdouble)width / selection_width,
4546                                      (gdouble)height / selection_height);
4547                 }
4548
4549                 cairo_surface_set_device_offset (selection_surface,
4550                                                  overlap.x - real_page_area.x,
4551                                                  overlap.y - real_page_area.y);
4552                 cairo_set_source_surface (cr, selection_surface, 0, 0);
4553                 cairo_paint (cr);
4554                 cairo_restore (cr);
4555         }
4556 }
4557
4558 /*** GObject functions ***/
4559
4560 static void
4561 ev_view_finalize (GObject *object)
4562 {
4563         EvView *view = EV_VIEW (object);
4564
4565         clear_selection (view);
4566         clear_link_selected (view);
4567
4568         if (view->image_dnd_info.image)
4569                 g_object_unref (view->image_dnd_info.image);
4570         view->image_dnd_info.image = NULL;
4571
4572         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
4573 }
4574
4575 static void
4576 ev_view_destroy (GtkObject *object)
4577 {
4578         EvView *view = EV_VIEW (object);
4579
4580         if (view->model) {
4581                 g_object_unref (view->model);
4582                 view->model = NULL;
4583         }
4584
4585         if (view->pixbuf_cache) {
4586                 g_object_unref (view->pixbuf_cache);
4587                 view->pixbuf_cache = NULL;
4588         }
4589
4590         if (view->document) {
4591                 g_object_unref (view->document);
4592                 view->document = NULL;
4593         }
4594
4595         if (view->page_cache) {
4596                 g_object_unref (view->page_cache);
4597                 view->page_cache = NULL;
4598         }
4599
4600         if (view->goto_window) {
4601                 gtk_widget_destroy (view->goto_window);
4602                 view->goto_window = NULL;
4603                 view->goto_entry = NULL;
4604         }
4605
4606         ev_view_window_children_free (view);
4607
4608         if (view->selection_scroll_id) {
4609             g_source_remove (view->selection_scroll_id);
4610             view->selection_scroll_id = 0;
4611         }
4612
4613         if (view->selection_update_id) {
4614             g_source_remove (view->selection_update_id);
4615             view->selection_update_id = 0;
4616         }
4617
4618         if (view->loading_text) {
4619                 cairo_surface_destroy (view->loading_text);
4620                 view->loading_text = NULL;
4621         }
4622
4623         if (view->scroll_info.timeout_id) {
4624             g_source_remove (view->scroll_info.timeout_id);
4625             view->scroll_info.timeout_id = 0;
4626         }
4627
4628         if (view->drag_info.drag_timeout_id) {
4629                 g_source_remove (view->drag_info.drag_timeout_id);
4630                 view->drag_info.drag_timeout_id = 0;
4631         }
4632
4633         if (view->drag_info.release_timeout_id) {
4634                 g_source_remove (view->drag_info.release_timeout_id);
4635                 view->drag_info.release_timeout_id = 0;
4636         }
4637
4638         ev_view_presentation_transition_stop (view);
4639
4640         ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL);
4641
4642         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
4643 }
4644
4645 static void
4646 ev_view_set_property (GObject      *object,
4647                       guint         prop_id,
4648                       const GValue *value,
4649                       GParamSpec   *pspec)
4650 {
4651         EvView *view = EV_VIEW (object);
4652
4653         switch (prop_id) {
4654                 case PROP_PRESENTATION:
4655                         ev_view_set_presentation (view, g_value_get_boolean (value));
4656                         break;
4657                 default:
4658                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4659         }
4660 }
4661
4662 static AtkObject *
4663 ev_view_get_accessible (GtkWidget *widget)
4664 {
4665         static gboolean first_time = TRUE;
4666
4667         if (first_time) {
4668                 AtkObjectFactory *factory;
4669                 AtkRegistry *registry;
4670                 GType derived_type;
4671                 GType derived_atk_type;
4672
4673                 /*
4674                  * Figure out whether accessibility is enabled by looking at the
4675                  * type of the accessible object which would be created for
4676                  * the parent type of EvView.
4677                  */
4678                 derived_type = g_type_parent (EV_TYPE_VIEW);
4679
4680                 registry = atk_get_default_registry ();
4681                 factory = atk_registry_get_factory (registry,
4682                                                     derived_type);
4683                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
4684                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
4685                         atk_registry_set_factory_type (registry,
4686                                                        EV_TYPE_VIEW,
4687                                                        ev_view_accessible_factory_get_type ());
4688                 first_time = FALSE;
4689         }
4690         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
4691 }
4692
4693 static void
4694 ev_view_get_property (GObject *object,
4695                       guint prop_id,
4696                       GValue *value,
4697                       GParamSpec *pspec)
4698 {
4699         EvView *view = EV_VIEW (object);
4700
4701         switch (prop_id) {
4702                 case PROP_PRESENTATION:
4703                         g_value_set_boolean (value, view->presentation);
4704                         break;
4705                 case PROP_HAS_SELECTION:
4706                         g_value_set_boolean (value,
4707                                              view->selection_info.selections != NULL);
4708                         break;
4709                 default:
4710                         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
4711         }
4712 }
4713
4714 static void
4715 ev_view_class_init (EvViewClass *class)
4716 {
4717         GObjectClass *object_class = G_OBJECT_CLASS (class);
4718         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
4719         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
4720         GtkLayoutClass *layout_class = GTK_LAYOUT_CLASS (class);
4721         GtkBindingSet *binding_set;
4722
4723         object_class->finalize = ev_view_finalize;
4724         object_class->set_property = ev_view_set_property;
4725         object_class->get_property = ev_view_get_property;
4726
4727         widget_class->expose_event = ev_view_expose_event;
4728         widget_class->button_press_event = ev_view_button_press_event;
4729         widget_class->motion_notify_event = ev_view_motion_notify_event;
4730         widget_class->button_release_event = ev_view_button_release_event;
4731         widget_class->key_press_event = ev_view_key_press_event;
4732         widget_class->focus_in_event = ev_view_focus_in;
4733         widget_class->focus_out_event = ev_view_focus_out;
4734         widget_class->get_accessible = ev_view_get_accessible;
4735         widget_class->size_request = ev_view_size_request;
4736         widget_class->size_allocate = ev_view_size_allocate;
4737         widget_class->realize = ev_view_realize;
4738         widget_class->scroll_event = ev_view_scroll_event;
4739         widget_class->enter_notify_event = ev_view_enter_notify_event;
4740         widget_class->leave_notify_event = ev_view_leave_notify_event;
4741         widget_class->style_set = ev_view_style_set;
4742         widget_class->drag_data_get = ev_view_drag_data_get;
4743         widget_class->drag_motion = ev_view_drag_motion;
4744         widget_class->popup_menu = ev_view_popup_menu;
4745         widget_class->query_tooltip = ev_view_query_tooltip;
4746
4747         gtk_object_class->destroy = ev_view_destroy;
4748
4749         layout_class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
4750
4751         class->binding_activated = ev_view_scroll;
4752
4753         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
4754                          G_TYPE_FROM_CLASS (object_class),
4755                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4756                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
4757                          NULL, NULL,
4758                          ev_view_marshal_VOID__ENUM_BOOLEAN,
4759                          G_TYPE_NONE, 2,
4760                          GTK_TYPE_SCROLL_TYPE,
4761                          G_TYPE_BOOLEAN);
4762         signals[SIGNAL_HANDLE_LINK] = g_signal_new ("handle-link",
4763                          G_TYPE_FROM_CLASS (object_class),
4764                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4765                          G_STRUCT_OFFSET (EvViewClass, handle_link),
4766                          NULL, NULL,
4767                          g_cclosure_marshal_VOID__OBJECT,
4768                          G_TYPE_NONE, 1,
4769                          G_TYPE_OBJECT);
4770         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
4771                          G_TYPE_FROM_CLASS (object_class),
4772                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4773                          G_STRUCT_OFFSET (EvViewClass, external_link),
4774                          NULL, NULL,
4775                          g_cclosure_marshal_VOID__OBJECT,
4776                          G_TYPE_NONE, 1,
4777                          G_TYPE_OBJECT);
4778         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
4779                          G_TYPE_FROM_CLASS (object_class),
4780                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
4781                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
4782                          NULL, NULL,
4783                          g_cclosure_marshal_VOID__OBJECT,
4784                          G_TYPE_NONE, 1,
4785                          G_TYPE_OBJECT);
4786
4787
4788         g_object_class_install_property (object_class,
4789                                          PROP_PRESENTATION,
4790                                          g_param_spec_boolean ("presentation",
4791                                                                "Presentation",
4792                                                                "Draw page in presentation mode",
4793                                                                TRUE,
4794                                                                G_PARAM_READWRITE));
4795         g_object_class_install_property (object_class,
4796                                          PROP_HAS_SELECTION,
4797                                          g_param_spec_boolean ("has-selection",
4798                                                                "Has selection",
4799                                                                "The view has selections",
4800                                                                FALSE,
4801                                                                G_PARAM_READABLE));
4802
4803         binding_set = gtk_binding_set_by_class (class);
4804
4805         add_scroll_binding_keypad (binding_set, GDK_Left,  0, GTK_SCROLL_STEP_BACKWARD, TRUE);
4806         add_scroll_binding_keypad (binding_set, GDK_Right, 0, GTK_SCROLL_STEP_FORWARD,  TRUE);
4807         add_scroll_binding_keypad (binding_set, GDK_Left,  GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, TRUE);
4808         add_scroll_binding_keypad (binding_set, GDK_Right, GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  TRUE);
4809         add_scroll_binding_keypad (binding_set, GDK_Up,    0, GTK_SCROLL_STEP_BACKWARD, FALSE);
4810         add_scroll_binding_keypad (binding_set, GDK_Down,  0, GTK_SCROLL_STEP_FORWARD,  FALSE);
4811         add_scroll_binding_keypad (binding_set, GDK_Up,    GDK_MOD1_MASK, GTK_SCROLL_STEP_DOWN, FALSE);
4812         add_scroll_binding_keypad (binding_set, GDK_Down,  GDK_MOD1_MASK, GTK_SCROLL_STEP_UP,  FALSE);
4813         gtk_binding_entry_add_signal (binding_set, GDK_H, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4814                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, TRUE);
4815         gtk_binding_entry_add_signal (binding_set, GDK_J, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4816                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, FALSE);
4817         gtk_binding_entry_add_signal (binding_set, GDK_K, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4818                                       GTK_SCROLL_STEP_BACKWARD, G_TYPE_BOOLEAN, FALSE);
4819         gtk_binding_entry_add_signal (binding_set, GDK_L, 0, "binding_activated", 2, GTK_TYPE_SCROLL_TYPE,
4820                                       GTK_SCROLL_STEP_FORWARD, G_TYPE_BOOLEAN, TRUE);
4821
4822 }
4823
4824 static void
4825 ev_view_init (EvView *view)
4826 {
4827         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
4828
4829         view->start_page = -1;
4830         view->end_page = -1;
4831         view->spacing = 5;
4832         view->scale = 1.0;
4833         view->current_page = 0;
4834         view->pressed_button = -1;
4835         view->cursor = EV_VIEW_CURSOR_NORMAL;
4836         view->drag_info.in_drag = FALSE;
4837         view->scroll_info.autoscrolling = FALSE;
4838         view->selection_info.selections = NULL;
4839         view->selection_info.in_selection = FALSE;
4840         view->selection_info.in_drag = FALSE;
4841         view->selection_mode = EV_VIEW_SELECTION_TEXT;
4842         view->continuous = TRUE;
4843         view->dual_page = FALSE;
4844         view->presentation = FALSE;
4845         view->presentation_state = EV_PRESENTATION_NORMAL;
4846         view->fullscreen = FALSE;
4847         view->sizing_mode = EV_SIZING_FIT_WIDTH;
4848         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
4849         view->jump_to_find_result = TRUE;
4850         view->highlight_find_results = FALSE;
4851
4852         gtk_layout_set_hadjustment (GTK_LAYOUT (view), NULL);
4853         gtk_layout_set_vadjustment (GTK_LAYOUT (view), NULL);
4854 }
4855
4856 /*** Callbacks ***/
4857
4858 static void
4859 ev_view_change_page (EvView *view,
4860                      gint    new_page,
4861                      gboolean start_transition)
4862 {
4863         gint x, y;
4864
4865         view->current_page = new_page;
4866         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
4867
4868         if (view->presentation && start_transition)
4869                 ev_view_presentation_transition_start (view);
4870
4871         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
4872         ev_view_handle_cursor_over_xy (view, x, y);
4873
4874         gtk_widget_queue_resize (GTK_WIDGET (view));
4875 }
4876
4877 static void
4878 ev_view_transition_animation_finish (EvTransitionAnimation *animation,
4879                                      EvView                *view)
4880 {
4881         g_object_unref (view->animation);
4882         view->animation = NULL;
4883         ev_view_change_page (view, view->current_page, TRUE);
4884 }
4885
4886 /**
4887  * ev_view_transition_animation_cancel:
4888  * @animation: Animation to finish
4889  * @view: An EvView
4890  *
4891  * Does almost the same as cancel, but without scheduling the transition.
4892  */
4893
4894 static void
4895 ev_view_transition_animation_cancel (EvTransitionAnimation *animation,
4896                                      EvView                *view)
4897 {
4898         g_object_unref (view->animation);
4899         view->animation = NULL;
4900         ev_view_change_page (view, view->current_page, FALSE);
4901 }
4902
4903 static void
4904 ev_view_transition_animation_frame (EvTransitionAnimation *animation,
4905                                     gdouble                progress,
4906                                     EvView                *view)
4907 {
4908         gtk_widget_queue_draw (GTK_WIDGET (view));
4909 }
4910
4911 static void
4912 ev_view_presentation_animation_start (EvView *view,
4913                                       int     new_page)
4914 {
4915         EvTransitionEffect *effect = NULL;
4916         cairo_surface_t *surface;
4917
4918         if (EV_IS_DOCUMENT_TRANSITION (view->document))
4919                 effect = ev_document_transition_get_effect (EV_DOCUMENT_TRANSITION (view->document),
4920                                                             view->current_page);
4921         if (!effect)
4922                 return;
4923
4924         view->animation = ev_transition_animation_new (effect);
4925
4926         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, view->current_page);
4927         ev_transition_animation_set_origin_surface (view->animation, surface);
4928         surface = ev_pixbuf_cache_get_surface (view->pixbuf_cache, new_page);
4929         if (surface)
4930                 ev_transition_animation_set_dest_surface (view->animation, surface);
4931
4932         g_signal_connect (view->animation, "frame",
4933                           G_CALLBACK (ev_view_transition_animation_frame), view);
4934         g_signal_connect (view->animation, "finished",
4935                           G_CALLBACK (ev_view_transition_animation_finish), view);
4936 }
4937
4938 static void
4939 job_finished_cb (EvPixbufCache *pixbuf_cache,
4940                  GdkRegion     *region,
4941                  EvView        *view)
4942 {
4943         if (view->animation) {
4944                 cairo_surface_t *surface;
4945
4946                 surface = ev_pixbuf_cache_get_surface (pixbuf_cache, view->current_page);
4947                 ev_transition_animation_set_dest_surface (view->animation, surface);
4948         }
4949
4950         if (region) {
4951                 gdk_window_invalidate_region (view->layout.bin_window,
4952                                               region, TRUE);
4953         } else {
4954                 gtk_widget_queue_draw (GTK_WIDGET (view));
4955         }
4956 }
4957
4958 static void
4959 ev_view_page_changed_cb (EvDocumentModel *model,
4960                          gint             old_page,
4961                          gint             new_page,
4962                          EvView          *view)
4963 {
4964         if (!view->document)
4965                 return;
4966
4967         if (view->current_page != new_page) {
4968                 if (view->presentation)
4969                         ev_view_presentation_animation_start (view, new_page);
4970
4971                 ev_view_change_page (view, new_page, TRUE);
4972         } else {
4973                 gtk_widget_queue_draw (GTK_WIDGET (view));
4974         }
4975
4976         view->find_result = 0;
4977 }
4978
4979 static void
4980 on_adjustment_value_changed (GtkAdjustment *adjustment,
4981                              EvView        *view)
4982 {
4983         int dx = 0, dy = 0;
4984         gint x, y;
4985         GList *children, *l;
4986
4987         if (! GTK_WIDGET_REALIZED (view))
4988                 return;
4989
4990         if (view->hadjustment) {
4991                 dx = view->scroll_x - (int) view->hadjustment->value;
4992                 view->scroll_x = (int) view->hadjustment->value;
4993         } else {
4994                 view->scroll_x = 0;
4995         }
4996
4997         if (view->vadjustment) {
4998                 dy = view->scroll_y - (int) view->vadjustment->value;
4999                 view->scroll_y = (int) view->vadjustment->value;
5000         } else {
5001                 view->scroll_y = 0;
5002         }
5003
5004         children = gtk_container_get_children (GTK_CONTAINER (view));
5005         for (l = children; l && l->data; l = g_list_next (l)) {
5006                 gint       child_x, child_y;
5007                 GtkWidget *child = (GtkWidget *)l->data;
5008
5009                 gtk_container_child_get (GTK_CONTAINER (view),
5010                                          child,
5011                                          "x", &child_x,
5012                                          "y", &child_y,
5013                                          NULL);
5014                 gtk_layout_move (GTK_LAYOUT (view), child, child_x + dx, child_y + dy);
5015         }
5016         g_list_free (children);
5017
5018         for (l = view->window_children; l && l->data; l = g_list_next (l)) {
5019                 EvViewWindowChild *child;
5020
5021                 child = (EvViewWindowChild *)l->data;
5022
5023                 ev_view_window_child_move (view, child, child->x + dx, child->y + dy);
5024         }
5025
5026         if (view->pending_resize)
5027                 gtk_widget_queue_draw (GTK_WIDGET (view));
5028         else
5029                 gdk_window_scroll (view->layout.bin_window, dx, dy);
5030
5031         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5032         ev_view_handle_cursor_over_xy (view, x, y);
5033
5034         if (view->document)
5035                 view_update_range_and_current_page (view);
5036 }
5037
5038 GtkWidget*
5039 ev_view_new (void)
5040 {
5041         GtkWidget *view;
5042
5043         view = g_object_new (EV_TYPE_VIEW, NULL);
5044
5045         return view;
5046 }
5047
5048 static void
5049 setup_caches (EvView *view)
5050 {
5051         gboolean inverted_colors;
5052
5053         view->height_to_page_cache = ev_view_get_height_to_page_cache (view);
5054         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
5055         view->page_cache = ev_page_cache_new (view->document);
5056         inverted_colors = ev_document_model_get_inverted_colors (view->model);
5057         ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5058         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
5059 }
5060
5061 static void
5062 clear_caches (EvView *view)
5063 {
5064         if (view->pixbuf_cache) {
5065                 g_object_unref (view->pixbuf_cache);
5066                 view->pixbuf_cache = NULL;
5067         }
5068
5069         if (view->page_cache) {
5070                 g_object_unref (view->page_cache);
5071                 view->page_cache = NULL;
5072         }
5073 }
5074
5075 void
5076 ev_view_set_loading (EvView       *view,
5077                      gboolean      loading)
5078 {
5079         view->loading = loading;
5080         gtk_widget_queue_draw (GTK_WIDGET (view));
5081 }
5082
5083 static gboolean
5084 ev_view_autoscroll_cb (EvView *view)
5085 {
5086         gdouble speed, value;
5087
5088         /* If the user stops autoscrolling, autoscrolling will be
5089          * set to false but the timeout will continue; stop the timeout: */
5090         if (!view->scroll_info.autoscrolling) {
5091                 view->scroll_info.timeout_id = 0;
5092                 return FALSE;
5093         }
5094
5095         if (view->scroll_info.last_y > view->scroll_info.start_y &&
5096                 (view->scroll_info.last_y < view->scroll_info.start_y))
5097                 return TRUE;
5098
5099         /* Replace 100 with your speed of choice: The lower the faster.
5100          * Replace 3 with another speed of choice: The higher, the faster it accelerated
5101          *      based on the distance of the starting point from the mouse
5102          * (All also effected by the timeout interval of this callback) */
5103
5104         if (view->scroll_info.start_y > view->scroll_info.last_y)
5105                 speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3);
5106         else
5107                 speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3);
5108
5109         value = gtk_adjustment_get_value (view->vadjustment);
5110         value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size);
5111         gtk_adjustment_set_value (view->vadjustment, value);
5112
5113         return TRUE;
5114
5115 }
5116
5117 void
5118 ev_view_autoscroll_start (EvView *view)
5119 {
5120         gint x, y;
5121
5122         g_return_if_fail (EV_IS_VIEW (view));
5123
5124         if (view->scroll_info.autoscrolling)
5125                 return;
5126
5127         view->scroll_info.autoscrolling = TRUE;
5128         view->scroll_info.timeout_id =
5129                 g_timeout_add (20, (GSourceFunc)ev_view_autoscroll_cb,
5130                                view);
5131
5132         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5133         ev_view_handle_cursor_over_xy (view, x, y);
5134 }
5135
5136 void
5137 ev_view_autoscroll_stop (EvView *view)
5138 {
5139         gint x, y;
5140
5141         g_return_if_fail (EV_IS_VIEW (view));
5142
5143         if (!view->scroll_info.autoscrolling)
5144                 return;
5145
5146         view->scroll_info.autoscrolling = FALSE;
5147         if (view->scroll_info.timeout_id) {
5148                 g_source_remove (view->scroll_info.timeout_id);
5149                 view->scroll_info.timeout_id = 0;
5150         }
5151
5152         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
5153         ev_view_handle_cursor_over_xy (view, x, y);
5154 }
5155
5156 static void
5157 ev_view_document_changed_cb (EvDocumentModel *model,
5158                              GParamSpec      *pspec,
5159                              EvView          *view)
5160 {
5161         EvDocument *document = ev_document_model_get_document (model);
5162
5163         view->loading = FALSE;
5164
5165         if (document != view->document) {
5166                 gint current_page;
5167
5168                 clear_caches (view);
5169
5170                 if (view->document) {
5171                         g_object_unref (view->document);
5172                 }
5173
5174                 view->document = document;
5175                 view->find_result = 0;
5176
5177                 if (view->document) {
5178                         g_object_ref (view->document);
5179                         setup_caches (view);
5180                 }
5181
5182                 current_page = ev_document_model_get_page (model);
5183                 if (view->current_page != current_page) {
5184                         ev_view_change_page (view, current_page, TRUE);
5185                 } else {
5186                         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
5187                         gtk_widget_queue_resize (GTK_WIDGET (view));
5188                 }
5189         }
5190 }
5191
5192 static void
5193 ev_view_rotation_changed_cb (EvDocumentModel *model,
5194                              GParamSpec      *pspec,
5195                              EvView          *view)
5196 {
5197         gint rotation = ev_document_model_get_rotation (model);
5198
5199         view->rotation = rotation;
5200
5201         if (view->pixbuf_cache) {
5202                 ev_pixbuf_cache_clear (view->pixbuf_cache);
5203                 if (!ev_document_is_page_size_uniform (view->document))
5204                         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5205                 gtk_widget_queue_resize (GTK_WIDGET (view));
5206         }
5207
5208         ev_view_remove_all (view);
5209
5210         if (rotation != 0)
5211                 clear_selection (view);
5212 }
5213
5214 static void
5215 ev_view_inverted_colors_changed_cb (EvDocumentModel *model,
5216                                     GParamSpec      *pspec,
5217                                     EvView          *view)
5218 {
5219         if (view->pixbuf_cache) {
5220                 gboolean inverted_colors;
5221
5222                 inverted_colors = ev_document_model_get_inverted_colors (model);
5223                 ev_pixbuf_cache_set_inverted_colors (view->pixbuf_cache, inverted_colors);
5224                 gtk_widget_queue_draw (GTK_WIDGET (view));
5225         }
5226 }
5227
5228 static void
5229 ev_view_sizing_mode_changed_cb (EvDocumentModel *model,
5230                                 GParamSpec      *pspec,
5231                                 EvView          *view)
5232 {
5233         EvSizingMode mode = ev_document_model_get_sizing_mode (model);
5234
5235         view->sizing_mode = mode;
5236         if (mode != EV_SIZING_FREE)
5237                 gtk_widget_queue_resize (GTK_WIDGET (view));
5238 }
5239
5240 #define EPSILON 0.0000001
5241 static void
5242 ev_view_scale_changed_cb (EvDocumentModel *model,
5243                           GParamSpec      *pspec,
5244                           EvView          *view)
5245 {
5246         gdouble scale = ev_document_model_get_scale (model);
5247
5248         if (ABS (view->scale - scale) < EPSILON)
5249                 return;
5250
5251         if (view->loading_text) {
5252                 cairo_surface_destroy (view->loading_text);
5253                 view->loading_text = NULL;
5254         }
5255
5256         view->scale = scale;
5257
5258         view->pending_resize = TRUE;
5259         if (view->sizing_mode == EV_SIZING_FREE)
5260                 gtk_widget_queue_resize (GTK_WIDGET (view));
5261 }
5262
5263 static void
5264 ev_view_continuous_changed_cb (EvDocumentModel *model,
5265                                GParamSpec      *pspec,
5266                                EvView          *view)
5267 {
5268         gboolean continuous = ev_document_model_get_continuous (model);
5269
5270         view->continuous = continuous;
5271         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5272         gtk_widget_queue_resize (GTK_WIDGET (view));
5273 }
5274
5275 static void
5276 ev_view_dual_page_changed_cb (EvDocumentModel *model,
5277                               GParamSpec      *pspec,
5278                               EvView          *view)
5279 {
5280         gboolean dual_page = ev_document_model_get_dual_page (model);
5281
5282         view->dual_page = dual_page;
5283         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5284         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
5285          * preload_cache_size to be 2 if dual_page is set.
5286          */
5287         gtk_widget_queue_resize (GTK_WIDGET (view));
5288 }
5289
5290 static void
5291 ev_view_fullscreen_changed_cb (EvDocumentModel *model,
5292                                GParamSpec      *pspec,
5293                                EvView          *view)
5294 {
5295         gboolean fullscreen = ev_document_model_get_fullscreen (model);
5296
5297         view->fullscreen = fullscreen;
5298         gtk_widget_queue_resize (GTK_WIDGET (view));
5299 }
5300
5301 void
5302 ev_view_set_model (EvView          *view,
5303                    EvDocumentModel *model)
5304 {
5305         g_return_if_fail (EV_IS_VIEW (view));
5306         g_return_if_fail (EV_IS_DOCUMENT_MODEL (model));
5307
5308         if (model == view->model)
5309                 return;
5310
5311         if (view->model) {
5312                 g_signal_handlers_disconnect_by_func (view->model,
5313                                                       ev_view_document_changed_cb,
5314                                                       view);
5315                 g_signal_handlers_disconnect_by_func (view->model,
5316                                                       ev_view_page_changed_cb,
5317                                                       view);
5318                 g_object_unref (view->model);
5319         }
5320         view->model = g_object_ref (model);
5321
5322         /* Initialize view from model */
5323         view->rotation = ev_document_model_get_rotation (view->model);
5324         view->sizing_mode = ev_document_model_get_sizing_mode (view->model);
5325         view->scale = ev_document_model_get_scale (view->model);
5326         view->continuous = ev_document_model_get_continuous (view->model);
5327         view->dual_page = ev_document_model_get_dual_page (view->model);
5328         view->fullscreen = ev_document_model_get_fullscreen (view->model);
5329         ev_view_document_changed_cb (view->model, NULL, view);
5330
5331         g_signal_connect (view->model, "notify::document",
5332                           G_CALLBACK (ev_view_document_changed_cb),
5333                           view);
5334         g_signal_connect (view->model, "notify::rotation",
5335                           G_CALLBACK (ev_view_rotation_changed_cb),
5336                           view);
5337         g_signal_connect (view->model, "notify::inverted-colors",
5338                           G_CALLBACK (ev_view_inverted_colors_changed_cb),
5339                           view);
5340         g_signal_connect (view->model, "notify::sizing-mode",
5341                           G_CALLBACK (ev_view_sizing_mode_changed_cb),
5342                           view);
5343         g_signal_connect (view->model, "notify::scale",
5344                           G_CALLBACK (ev_view_scale_changed_cb),
5345                           view);
5346         g_signal_connect (view->model, "notify::continuous",
5347                           G_CALLBACK (ev_view_continuous_changed_cb),
5348                           view);
5349         g_signal_connect (view->model, "notify::dual-page",
5350                           G_CALLBACK (ev_view_dual_page_changed_cb),
5351                           view);
5352         g_signal_connect (view->model, "notify::fullscreen",
5353                           G_CALLBACK (ev_view_fullscreen_changed_cb),
5354                           view);
5355         g_signal_connect (view->model, "page-changed",
5356                           G_CALLBACK (ev_view_page_changed_cb),
5357                           view);
5358 }
5359
5360 static void
5361 ev_view_reload_page (EvView    *view,
5362                      gint       page,
5363                      GdkRegion *region)
5364 {
5365         ev_pixbuf_cache_reload_page (view->pixbuf_cache,
5366                                      region,
5367                                      page,
5368                                      view->rotation,
5369                                      view->scale);
5370 }
5371
5372 void
5373 ev_view_reload (EvView *view)
5374 {
5375         ev_pixbuf_cache_clear (view->pixbuf_cache);
5376         view_update_range_and_current_page (view);
5377 }
5378
5379 void
5380 ev_view_set_presentation (EvView   *view,
5381                           gboolean  presentation)
5382 {
5383         g_return_if_fail (EV_IS_VIEW (view));
5384
5385         presentation = presentation != FALSE;
5386
5387         if (view->presentation == presentation)
5388                 return;
5389
5390         if (!presentation)
5391                 view->presentation_state = EV_PRESENTATION_NORMAL;
5392
5393         view->presentation = presentation;
5394         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
5395
5396         if (presentation) {
5397                 clear_selection (view);
5398                 /* FIXME: save selections */
5399                 view->sizing_mode_saved = view->sizing_mode;
5400                 view->scale_saved = view->scale;
5401                 ev_document_model_set_sizing_mode (view->model, EV_SIZING_BEST_FIT);
5402         } else {
5403                 ev_document_model_set_sizing_mode (view->model, view->sizing_mode_saved);
5404                 ev_document_model_set_scale (view->model, view->scale_saved);
5405         }
5406
5407         gtk_widget_queue_resize (GTK_WIDGET (view));
5408
5409         if (presentation)
5410                 ev_view_presentation_transition_start (view);
5411         else {
5412                 ev_view_presentation_transition_stop (view);
5413
5414                 if (view->animation) {
5415                         /* stop any running animation */
5416                         ev_view_transition_animation_cancel (view->animation, view);
5417                 }
5418         }
5419
5420         if (GTK_WIDGET_REALIZED (view)) {
5421                 if (view->presentation)
5422                         gdk_window_set_background (view->layout.bin_window,
5423                                                    &GTK_WIDGET (view)->style->black);
5424                 else
5425                         gdk_window_set_background (view->layout.bin_window,
5426                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
5427         }
5428
5429         g_object_notify (G_OBJECT (view), "presentation");
5430 }
5431
5432 gboolean
5433 ev_view_get_presentation (EvView *view)
5434 {
5435         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
5436
5437         return view->presentation;
5438 }
5439
5440 static gboolean
5441 transition_next_page (EvView *view)
5442 {
5443         ev_view_next_page (view);
5444
5445         return FALSE;
5446 }
5447
5448 static void
5449 ev_view_presentation_transition_stop (EvView *view)
5450 {
5451         if (view->trans_timeout_id > 0)
5452                 g_source_remove (view->trans_timeout_id);
5453         view->trans_timeout_id = 0;
5454 }
5455
5456 static void
5457 ev_view_presentation_transition_start (EvView *view)
5458 {
5459         gdouble duration;
5460
5461         if (!EV_IS_DOCUMENT_TRANSITION (view->document))
5462                 return;
5463
5464         ev_view_presentation_transition_stop (view);
5465
5466         duration = ev_document_transition_get_page_duration (EV_DOCUMENT_TRANSITION (view->document),
5467                                                              view->current_page);
5468         if (duration > 0) {
5469                 view->trans_timeout_id =
5470                         g_timeout_add_seconds (duration,
5471                                                (GSourceFunc) transition_next_page,
5472                                                view);
5473         }
5474 }
5475
5476 /*** Zoom and sizing mode ***/
5477
5478 gboolean
5479 ev_view_can_zoom_in (EvView *view)
5480 {
5481         return view->scale * ZOOM_IN_FACTOR <= ev_document_model_get_max_scale (view->model);
5482 }
5483
5484 gboolean
5485 ev_view_can_zoom_out (EvView *view)
5486 {
5487         return view->scale * ZOOM_OUT_FACTOR >= ev_document_model_get_min_scale (view->model);
5488 }
5489
5490 void
5491 ev_view_zoom_in (EvView *view)
5492 {
5493         gdouble scale;
5494
5495         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5496
5497         if (view->presentation)
5498                 return;
5499
5500         view->pending_scroll = SCROLL_TO_CENTER;
5501         scale = ev_document_model_get_scale (view->model) * ZOOM_IN_FACTOR;
5502         ev_document_model_set_scale (view->model, scale);
5503 }
5504
5505 void
5506 ev_view_zoom_out (EvView *view)
5507 {
5508         gdouble scale;
5509
5510         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
5511
5512         if (view->presentation)
5513                 return;
5514
5515         view->pending_scroll = SCROLL_TO_CENTER;
5516         scale = ev_document_model_get_scale (view->model) * ZOOM_OUT_FACTOR;
5517         ev_document_model_set_scale (view->model, scale);
5518 }
5519
5520 static double
5521 zoom_for_size_fit_width (gdouble doc_width,
5522                          gdouble doc_height,
5523                          int     target_width,
5524                          int     target_height)
5525 {
5526         return (double)target_width / doc_width;
5527 }
5528
5529 static double
5530 zoom_for_size_fit_height (gdouble doc_width,
5531                           gdouble doc_height,
5532                           int     target_width,
5533                           int     target_height)
5534 {
5535         return (double)target_height / doc_height;
5536 }
5537
5538 static double
5539 zoom_for_size_best_fit (gdouble doc_width,
5540                         gdouble doc_height,
5541                         int     target_width,
5542                         int     target_height)
5543 {
5544         double w_scale;
5545         double h_scale;
5546
5547         w_scale = (double)target_width / doc_width;
5548         h_scale = (double)target_height / doc_height;
5549
5550         return MIN (w_scale, h_scale);
5551 }
5552
5553
5554 static void
5555 ev_view_zoom_for_size_presentation (EvView *view,
5556                                     int     width,
5557                                     int     height)
5558 {
5559         gdouble doc_width, doc_height;
5560         gdouble scale;
5561
5562         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5563         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5564         ev_document_model_set_scale (view->model, scale);
5565 }
5566
5567 static void
5568 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
5569                                                 int     width,
5570                                                 int     height)
5571 {
5572         gdouble doc_width, doc_height;
5573         GtkBorder border;
5574         gdouble scale;
5575
5576         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5577         if (view->rotation == 90 || view->rotation == 270) {
5578                 gdouble tmp;
5579
5580                 tmp = doc_width;
5581                 doc_width = doc_height;
5582                 doc_height = tmp;
5583         }
5584
5585         compute_border (view, doc_width, doc_height, &border);
5586
5587         doc_width *= 2;
5588         width -= (2 * (border.left + border.right) + 3 * view->spacing);
5589         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5590
5591         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5592                 gint sb_size;
5593
5594                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5595                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5596         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5597                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5598         else
5599                 g_assert_not_reached ();
5600
5601         ev_document_model_set_scale (view->model, scale);
5602 }
5603
5604 static void
5605 ev_view_zoom_for_size_continuous (EvView *view,
5606                                   int     width,
5607                                   int     height)
5608 {
5609         gdouble doc_width, doc_height;
5610         GtkBorder border;
5611         gdouble scale;
5612
5613         ev_document_get_max_page_size (view->document, &doc_width, &doc_height);
5614         if (view->rotation == 90 || view->rotation == 270) {
5615                 gdouble tmp;
5616
5617                 tmp = doc_width;
5618                 doc_width = doc_height;
5619                 doc_height = tmp;
5620         }
5621
5622         compute_border (view, doc_width, doc_height, &border);
5623
5624         width -= (border.left + border.right + 2 * view->spacing);
5625         height -= (border.top + border.bottom + 2 * view->spacing - 1);
5626
5627         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5628                 gint sb_size;
5629
5630                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5631                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5632         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5633                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5634         else
5635                 g_assert_not_reached ();
5636
5637         ev_document_model_set_scale (view->model, scale);
5638 }
5639
5640 static void
5641 ev_view_zoom_for_size_dual_page (EvView *view,
5642                                  int     width,
5643                                  int     height)
5644 {
5645         GtkBorder border;
5646         gdouble doc_width, doc_height;
5647         gdouble scale;
5648         gint other_page;
5649
5650         other_page = view->current_page ^ 1;
5651
5652         /* Find the largest of the two. */
5653         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5654         if (other_page < ev_document_get_n_pages (view->document)) {
5655                 gdouble width_2, height_2;
5656
5657                 get_doc_page_size (view, other_page, &width_2, &height_2);
5658                 if (width_2 > doc_width)
5659                         doc_width = width_2;
5660                 if (height_2 > doc_height)
5661                         doc_height = height_2;
5662         }
5663         compute_border (view, width, height, &border);
5664
5665         doc_width = doc_width * 2;
5666         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
5667         height -= (border.top + border.bottom + 2 * view->spacing);
5668
5669         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5670                 gint sb_size;
5671
5672                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5673                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5674         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5675                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5676         else
5677                 g_assert_not_reached ();
5678
5679         ev_document_model_set_scale (view->model, scale);
5680 }
5681
5682 static void
5683 ev_view_zoom_for_size_single_page (EvView *view,
5684                                    int     width,
5685                                    int     height)
5686 {
5687         gdouble doc_width, doc_height;
5688         GtkBorder border;
5689         gdouble scale;
5690
5691         get_doc_page_size (view, view->current_page, &doc_width, &doc_height);
5692
5693         /* Get an approximate border */
5694         compute_border (view, width, height, &border);
5695
5696         width -= (border.left + border.right + 2 * view->spacing);
5697         height -= (border.top + border.bottom + 2 * view->spacing);
5698
5699         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
5700                 gint sb_size;
5701
5702                 sb_size = ev_view_get_scrollbar_size (view, GTK_ORIENTATION_VERTICAL);
5703                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - sb_size, height);
5704         } else if (view->sizing_mode == EV_SIZING_BEST_FIT)
5705                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height);
5706         else
5707                 g_assert_not_reached ();
5708
5709         ev_document_model_set_scale (view->model, scale);
5710 }
5711
5712 static void
5713 ev_view_zoom_for_size (EvView *view,
5714                        int     width,
5715                        int     height)
5716 {
5717         g_return_if_fail (EV_IS_VIEW (view));
5718         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
5719                           view->sizing_mode == EV_SIZING_BEST_FIT);
5720         g_return_if_fail (width >= 0);
5721         g_return_if_fail (height >= 0);
5722
5723         if (view->document == NULL)
5724                 return;
5725
5726         if (view->presentation)
5727                 ev_view_zoom_for_size_presentation (view, width, height);
5728         else if (view->continuous && view->dual_page)
5729                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height);
5730         else if (view->continuous)
5731                 ev_view_zoom_for_size_continuous (view, width, height);
5732         else if (view->dual_page)
5733                 ev_view_zoom_for_size_dual_page (view, width, height);
5734         else
5735                 ev_view_zoom_for_size_single_page (view, width, height);
5736 }
5737
5738 /*** Find ***/
5739 static gint
5740 ev_view_find_get_n_results (EvView *view, gint page)
5741 {
5742         return view->find_pages ? g_list_length (view->find_pages[page]) : 0;
5743 }
5744
5745 static EvRectangle *
5746 ev_view_find_get_result (EvView *view, gint page, gint result)
5747 {
5748         return view->find_pages ? (EvRectangle *) g_list_nth_data (view->find_pages[page], result) : NULL;
5749 }
5750
5751 static void
5752 jump_to_find_result (EvView *view)
5753 {
5754         gint n_results;
5755         gint page = view->current_page;
5756
5757         n_results = ev_view_find_get_n_results (view, page);
5758
5759         if (n_results > 0 && view->find_result < n_results) {
5760                 EvRectangle *rect;
5761                 GdkRectangle view_rect;
5762
5763                 rect = ev_view_find_get_result (view, page, view->find_result);
5764                 doc_rect_to_view_rect (view, page, rect, &view_rect);
5765                 ensure_rectangle_is_visible (view, &view_rect);
5766                 view->jump_to_find_result = FALSE;
5767         }
5768 }
5769
5770 /**
5771  * jump_to_find_page
5772  * @view: #EvView instance
5773  * @direction: Direction to look
5774  * @shift: Shift from current page
5775  *
5776  * Jumps to the first page that has occurences of searched word.
5777  * Uses a direction where to look and a shift from current page.
5778  *
5779  */
5780 static void
5781 jump_to_find_page (EvView *view, EvViewFindDirection direction, gint shift)
5782 {
5783         int n_pages, i;
5784
5785         n_pages = ev_document_get_n_pages (view->document);
5786
5787         for (i = 0; i < n_pages; i++) {
5788                 int page;
5789
5790                 if (direction == EV_VIEW_FIND_NEXT)
5791                         page = view->current_page + i;
5792                 else
5793                         page = view->current_page - i;
5794                 page += shift;
5795
5796                 if (page >= n_pages) {
5797                         page = page - n_pages;
5798                 } else if (page < 0)
5799                         page = page + n_pages;
5800
5801                 if (ev_view_find_get_n_results (view, page) > 0) {
5802                         ev_document_model_set_page (view->model, page);
5803                         break;
5804                 }
5805         }
5806 }
5807
5808 void
5809 ev_view_find_changed (EvView *view, GList **results, gint page)
5810 {
5811         view->find_pages = results;
5812
5813         if (view->jump_to_find_result == TRUE) {
5814                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 0);
5815                 jump_to_find_result (view);
5816         }
5817
5818         if (view->current_page == page)
5819                 gtk_widget_queue_draw (GTK_WIDGET (view));
5820 }
5821
5822 void
5823 ev_view_find_next (EvView *view)
5824 {
5825         gint n_results;
5826
5827         n_results = ev_view_find_get_n_results (view, view->current_page);
5828         view->find_result++;
5829
5830         if (view->find_result >= n_results) {
5831                 view->find_result = 0;
5832                 jump_to_find_page (view, EV_VIEW_FIND_NEXT, 1);
5833                 jump_to_find_result (view);
5834         } else {
5835                 jump_to_find_result (view);
5836                 gtk_widget_queue_draw (GTK_WIDGET (view));
5837         }
5838 }
5839
5840 void
5841 ev_view_find_previous (EvView *view)
5842 {
5843         view->find_result--;
5844
5845         if (view->find_result < 0) {
5846                 jump_to_find_page (view, EV_VIEW_FIND_PREV, -1);
5847                 view->find_result = MAX (0, ev_view_find_get_n_results (view, view->current_page) - 1);
5848                 jump_to_find_result (view);
5849         } else {
5850                 jump_to_find_result (view);
5851                 gtk_widget_queue_draw (GTK_WIDGET (view));
5852         }
5853 }
5854
5855 void
5856 ev_view_find_search_changed (EvView *view)
5857 {
5858         /* search string has changed, focus on new search result */
5859         view->jump_to_find_result = TRUE;
5860         view->find_pages = NULL;
5861 }
5862
5863 void
5864 ev_view_find_set_highlight_search (EvView *view, gboolean value)
5865 {
5866         view->highlight_find_results = value;
5867         gtk_widget_queue_draw (GTK_WIDGET (view));
5868 }
5869
5870 void
5871 ev_view_find_cancel (EvView *view)
5872 {
5873         view->find_pages = NULL;
5874 }
5875
5876 /*** Selections ***/
5877
5878 /* compute_new_selection_rect/text calculates the area currently selected by
5879  * view_rect.  each handles a different mode;
5880  */
5881 static GList *
5882 compute_new_selection_rect (EvView       *view,
5883                             GdkPoint     *start,
5884                             GdkPoint     *stop)
5885 {
5886         GdkRectangle view_rect;
5887         int n_pages, i;
5888         GList *list = NULL;
5889
5890         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
5891
5892         view_rect.x = MIN (start->x, stop->x);
5893         view_rect.y = MIN (start->y, stop->y);
5894         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
5895         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
5896
5897         n_pages = ev_document_get_n_pages (view->document);
5898
5899         for (i = 0; i < n_pages; i++) {
5900                 GdkRectangle page_area;
5901                 GtkBorder border;
5902
5903                 if (get_page_extents (view, i, &page_area, &border)) {
5904                         GdkRectangle overlap;
5905
5906                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
5907                                 EvViewSelection *selection;
5908
5909                                 selection = g_new0 (EvViewSelection, 1);
5910                                 selection->page = i;
5911                                 view_rect_to_doc_rect (view, &overlap, &page_area,
5912                                                        &(selection->rect));
5913
5914                                 list = g_list_append (list, selection);
5915                         }
5916                 }
5917         }
5918
5919         return list;
5920 }
5921
5922 static gboolean
5923 gdk_rectangle_point_in (GdkRectangle *rectangle,
5924                         GdkPoint     *point)
5925 {
5926         return rectangle->x <= point->x &&
5927                 rectangle->y <= point->y &&
5928                 point->x < rectangle->x + rectangle->width &&
5929                 point->y < rectangle->y + rectangle->height;
5930 }
5931
5932 static GList *
5933 compute_new_selection_text (EvView          *view,
5934                             EvSelectionStyle style,
5935                             GdkPoint        *start,
5936                             GdkPoint        *stop)
5937 {
5938         int n_pages, i, first, last;
5939         GList *list = NULL;
5940         EvViewSelection *selection;
5941         gdouble width, height;
5942         int start_page, end_page;
5943
5944         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
5945
5946         n_pages = ev_document_get_n_pages (view->document);
5947
5948         /* First figure out the range of pages the selection
5949          * affects. */
5950         first = n_pages;
5951         last = 0;
5952         if (view->continuous) {
5953                 start_page = 0;
5954                 end_page = n_pages;
5955         } else if (view->dual_page) {
5956                 start_page = view->start_page;
5957                 end_page = view->end_page + 1;
5958         } else {
5959                 start_page = view->current_page;
5960                 end_page = view->current_page + 1;
5961         }
5962
5963         for (i = start_page; i < end_page; i++) {
5964                 GdkRectangle page_area;
5965                 GtkBorder border;
5966
5967                 get_page_extents (view, i, &page_area, &border);
5968                 if (gdk_rectangle_point_in (&page_area, start) ||
5969                     gdk_rectangle_point_in (&page_area, stop)) {
5970                         if (first == n_pages)
5971                                 first = i;
5972                         last = i;
5973                 }
5974
5975         }
5976
5977         /* Now create a list of EvViewSelection's for the affected
5978          * pages.  This could be an empty list, a list of just one
5979          * page or a number of pages.*/
5980         for (i = first; i < last + 1; i++) {
5981                 GdkRectangle page_area;
5982                 GtkBorder border;
5983                 GdkPoint *point;
5984
5985                 get_doc_page_size (view, i, &width, &height);
5986
5987                 selection = g_new0 (EvViewSelection, 1);
5988                 selection->page = i;
5989                 selection->style = style;
5990                 selection->rect.x1 = selection->rect.y1 = 0;
5991                 selection->rect.x2 = width;
5992                 selection->rect.y2 = height;
5993
5994                 get_page_extents (view, i, &page_area, &border);
5995
5996                 if (gdk_rectangle_point_in (&page_area, start))
5997                         point = start;
5998                 else
5999                         point = stop;
6000
6001                 if (i == first)
6002                         view_point_to_doc_point (view, point, &page_area,
6003                                                  &selection->rect.x1,
6004                                                  &selection->rect.y1);
6005
6006                 /* If the selection is contained within just one page,
6007                  * make sure we don't write 'start' into both points
6008                  * in selection->rect. */
6009                 if (first == last)
6010                         point = stop;
6011
6012                 if (i == last)
6013                         view_point_to_doc_point (view, point, &page_area,
6014                                                  &selection->rect.x2,
6015                                                  &selection->rect.y2);
6016
6017                 list = g_list_append (list, selection);
6018         }
6019
6020         return list;
6021 }
6022
6023 /* This function takes the newly calculated list, and figures out which regions
6024  * have changed.  It then queues a redraw approporiately.
6025  */
6026 static void
6027 merge_selection_region (EvView *view,
6028                         GList  *new_list)
6029 {
6030         GList *old_list;
6031         GList *new_list_ptr, *old_list_ptr;
6032
6033         /* Update the selection */
6034         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
6035         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6036         g_list_free (view->selection_info.selections);
6037         view->selection_info.selections = new_list;
6038         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
6039         g_object_notify (G_OBJECT (view), "has-selection");
6040
6041         new_list_ptr = new_list;
6042         old_list_ptr = old_list;
6043
6044         while (new_list_ptr || old_list_ptr) {
6045                 EvViewSelection *old_sel, *new_sel;
6046                 int cur_page;
6047                 GdkRegion *region = NULL;
6048
6049                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
6050                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
6051
6052                 /* Assume that the lists are in order, and we run through them
6053                  * comparing them, one page at a time.  We come out with the
6054                  * first page we see. */
6055                 if (new_sel && old_sel) {
6056                         if (new_sel->page < old_sel->page) {
6057                                 new_list_ptr = new_list_ptr->next;
6058                                 old_sel = NULL;
6059                         } else if (new_sel->page > old_sel->page) {
6060                                 old_list_ptr = old_list_ptr->next;
6061                                 new_sel = NULL;
6062                         } else {
6063                                 new_list_ptr = new_list_ptr->next;
6064                                 old_list_ptr = old_list_ptr->next;
6065                         }
6066                 } else if (new_sel) {
6067                         new_list_ptr = new_list_ptr->next;
6068                 } else if (old_sel) {
6069                         old_list_ptr = old_list_ptr->next;
6070                 }
6071
6072                 g_assert (new_sel || old_sel);
6073
6074                 /* is the page we're looking at on the screen?*/
6075                 cur_page = new_sel ? new_sel->page : old_sel->page;
6076                 if (cur_page < view->start_page || cur_page > view->end_page)
6077                         continue;
6078
6079                 /* seed the cache with a new page.  We are going to need the new
6080                  * region too. */
6081                 if (new_sel) {
6082                         GdkRegion *tmp_region = NULL;
6083
6084                         ev_pixbuf_cache_get_selection_surface (view->pixbuf_cache,
6085                                                                cur_page,
6086                                                                view->scale,
6087                                                                &tmp_region);
6088
6089                         if (tmp_region) {
6090                                 new_sel->covered_region = gdk_region_copy (tmp_region);
6091                         }
6092                 }
6093
6094                 /* Now we figure out what needs redrawing */
6095                 if (old_sel && new_sel) {
6096                         if (old_sel->covered_region && new_sel->covered_region) {
6097                                 /* We only want to redraw the areas that have
6098                                  * changed, so we xor the old and new regions
6099                                  * and redraw if it's different */
6100                                 region = gdk_region_copy (old_sel->covered_region);
6101                                 gdk_region_xor (region, new_sel->covered_region);
6102                                 if (gdk_region_empty (region)) {
6103                                         gdk_region_destroy (region);
6104                                         region = NULL;
6105                                 }
6106                         } else if (old_sel->covered_region) {
6107                                 region = gdk_region_copy (old_sel->covered_region);
6108                         } else if (new_sel->covered_region) {
6109                                 region = gdk_region_copy (new_sel->covered_region);
6110                         }
6111                 } else if (old_sel && !new_sel) {
6112                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
6113                                 region = gdk_region_copy (old_sel->covered_region);
6114                         }
6115                 } else if (!old_sel && new_sel) {
6116                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
6117                                 region = gdk_region_copy (new_sel->covered_region);
6118                         }
6119                 } else {
6120                         g_assert_not_reached ();
6121                 }
6122
6123                 /* Redraw the damaged region! */
6124                 if (region) {
6125                         GdkRectangle page_area;
6126                         GtkBorder border;
6127
6128                         /* I don't know why but the region is smaller
6129                          * than expected. This hack fixes it, I guess
6130                          * 10 pixels more won't hurt
6131                          */
6132                         gdk_region_shrink (region, -5, -5);
6133
6134                         get_page_extents (view, cur_page, &page_area, &border);
6135                         gdk_region_offset (region,
6136                                            page_area.x + border.left - view->scroll_x,
6137                                            page_area.y + border.top - view->scroll_y);
6138                         gdk_window_invalidate_region (view->layout.bin_window, region, TRUE);
6139                         gdk_region_destroy (region);
6140                 }
6141         }
6142
6143         /* Free the old list, now that we're done with it. */
6144         g_list_foreach (old_list, (GFunc) selection_free, NULL);
6145         g_list_free (old_list);
6146 }
6147
6148 static void
6149 compute_selections (EvView          *view,
6150                     EvSelectionStyle style,
6151                     GdkPoint        *start,
6152                     GdkPoint        *stop)
6153 {
6154         GList *list;
6155
6156         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
6157                 list = compute_new_selection_rect (view, start, stop);
6158         else
6159                 list = compute_new_selection_text (view, style, start, stop);
6160         merge_selection_region (view, list);
6161 }
6162
6163 /* Free's the selection.  It's up to the caller to queue redraws if needed.
6164  */
6165 static void
6166 selection_free (EvViewSelection *selection)
6167 {
6168         if (selection->covered_region)
6169                 gdk_region_destroy (selection->covered_region);
6170         g_free (selection);
6171 }
6172
6173 static void
6174 clear_selection (EvView *view)
6175 {
6176         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
6177         g_list_free (view->selection_info.selections);
6178         view->selection_info.selections = NULL;
6179         view->selection_info.in_selection = FALSE;
6180         if (view->pixbuf_cache)
6181                 ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, NULL);
6182         g_object_notify (G_OBJECT (view), "has-selection");
6183 }
6184
6185 void
6186 ev_view_select_all (EvView *view)
6187 {
6188         GList *selections = NULL;
6189         int n_pages, i;
6190
6191         /* Disable selection on rotated pages for the 0.4.0 series */
6192         if (view->rotation != 0)
6193                 return;
6194
6195         clear_selection (view);
6196
6197         n_pages = ev_document_get_n_pages (view->document);
6198         for (i = 0; i < n_pages; i++) {
6199                 gdouble width, height;
6200                 EvViewSelection *selection;
6201
6202                 get_doc_page_size (view, i, &width, &height);
6203
6204                 selection = g_new0 (EvViewSelection, 1);
6205                 selection->page = i;
6206                 selection->style = EV_SELECTION_STYLE_GLYPH;
6207                 selection->rect.x1 = selection->rect.y1 = 0;
6208                 selection->rect.x2 = width;
6209                 selection->rect.y2 = height;
6210
6211                 selections = g_list_append (selections, selection);
6212         }
6213
6214         merge_selection_region (view, selections);
6215         gtk_widget_queue_draw (GTK_WIDGET (view));
6216 }
6217
6218 gboolean
6219 ev_view_get_has_selection (EvView *view)
6220 {
6221         return view->selection_info.selections != NULL;
6222 }
6223
6224 static char *
6225 get_selected_text (EvView *view)
6226 {
6227         GString *text;
6228         GList *l;
6229         gchar *normalized_text;
6230         EvRenderContext *rc;
6231
6232         text = g_string_new (NULL);
6233         rc = ev_render_context_new (NULL, view->rotation, view->scale);
6234
6235         ev_document_doc_mutex_lock ();
6236
6237         for (l = view->selection_info.selections; l != NULL; l = l->next) {
6238                 EvViewSelection *selection = (EvViewSelection *)l->data;
6239                 EvPage *page;
6240                 gchar *tmp;
6241
6242                 page = ev_document_get_page (view->document, selection->page);
6243                 ev_render_context_set_page (rc, page);
6244                 g_object_unref (page);
6245
6246                 tmp = ev_selection_get_selected_text (EV_SELECTION (view->document),
6247                                                       rc, selection->style,
6248                                                       &(selection->rect));
6249
6250                 g_string_append (text, tmp);
6251                 g_free (tmp);
6252         }
6253
6254         g_object_unref (rc);
6255
6256         ev_document_doc_mutex_unlock ();
6257
6258         normalized_text = g_utf8_normalize (text->str, text->len, G_NORMALIZE_NFKC);
6259         g_string_free (text, TRUE);
6260         return normalized_text;
6261 }
6262
6263 static void
6264 ev_view_clipboard_copy (EvView      *view,
6265                         const gchar *text)
6266 {
6267         GtkClipboard *clipboard;
6268
6269         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (view),
6270                                               GDK_SELECTION_CLIPBOARD);
6271         gtk_clipboard_set_text (clipboard, text, -1);
6272 }
6273
6274 void
6275 ev_view_copy (EvView *ev_view)
6276 {
6277         char *text;
6278
6279         if (!EV_IS_SELECTION (ev_view->document))
6280                 return;
6281
6282         text = get_selected_text (ev_view);
6283         ev_view_clipboard_copy (ev_view, text);
6284         g_free (text);
6285 }
6286
6287 static void
6288 ev_view_primary_get_cb (GtkClipboard     *clipboard,
6289                         GtkSelectionData *selection_data,
6290                         guint             info,
6291                         gpointer          data)
6292 {
6293         EvView *ev_view = EV_VIEW (data);
6294
6295         if (ev_view->link_selected) {
6296                 gtk_selection_data_set_text (selection_data,
6297                                              ev_link_action_get_uri (ev_view->link_selected),
6298                                              -1);
6299         } else if (EV_IS_SELECTION (ev_view->document) &&
6300                    ev_view->selection_info.selections) {
6301                 gchar *text;
6302
6303                 text = get_selected_text (ev_view);
6304                 if (text) {
6305                         gtk_selection_data_set_text (selection_data, text, -1);
6306                         g_free (text);
6307                 }
6308         }
6309 }
6310
6311 static void
6312 ev_view_primary_clear_cb (GtkClipboard *clipboard,
6313                           gpointer      data)
6314 {
6315         EvView *view = EV_VIEW (data);
6316
6317         clear_selection (view);
6318         clear_link_selected (view);
6319 }
6320
6321 static void
6322 ev_view_update_primary_selection (EvView *ev_view)
6323 {
6324         GtkClipboard *clipboard;
6325
6326         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
6327                                               GDK_SELECTION_PRIMARY);
6328
6329         if (ev_view->selection_info.selections || ev_view->link_selected) {
6330                 GtkTargetList *target_list;
6331                 GtkTargetEntry *targets;
6332                 int n_targets;
6333
6334                 target_list = gtk_target_list_new (NULL, 0);
6335                 gtk_target_list_add_text_targets (target_list, 0);
6336                 targets = gtk_target_table_new_from_list (target_list, &n_targets);
6337                 gtk_target_list_unref (target_list);
6338
6339                 if (!gtk_clipboard_set_with_owner (clipboard,
6340                                                    targets, n_targets,
6341                                                    ev_view_primary_get_cb,
6342                                                    ev_view_primary_clear_cb,
6343                                                    G_OBJECT (ev_view)))
6344                         ev_view_primary_clear_cb (clipboard, ev_view);
6345
6346                 gtk_target_table_free (targets, n_targets);
6347         } else {
6348                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
6349                         gtk_clipboard_clear (clipboard);
6350         }
6351 }
6352
6353 static void
6354 clear_link_selected (EvView *view)
6355 {
6356         if (view->link_selected) {
6357                 g_object_unref (view->link_selected);
6358                 view->link_selected = NULL;
6359         }
6360 }
6361
6362 void
6363 ev_view_copy_link_address (EvView       *view,
6364                            EvLinkAction *action)
6365 {
6366         clear_link_selected (view);
6367
6368         ev_view_clipboard_copy (view, ev_link_action_get_uri (action));
6369
6370         view->link_selected = g_object_ref (action);
6371         ev_view_update_primary_selection (view);
6372 }
6373
6374 /*** Cursor operations ***/
6375
6376 static GdkCursor *
6377 ev_view_create_invisible_cursor(void)
6378 {
6379        GdkBitmap *empty;
6380        GdkColor black = { 0, 0, 0, 0 };
6381        static char bits[] = { 0x00 };
6382
6383        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
6384
6385        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
6386 }
6387
6388 static void
6389 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
6390 {
6391         GdkCursor *cursor = NULL;
6392         GdkDisplay *display;
6393         GtkWidget *widget;
6394
6395         if (view->cursor == new_cursor) {
6396                 return;
6397         }
6398
6399         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
6400         display = gtk_widget_get_display (widget);
6401         view->cursor = new_cursor;
6402
6403         switch (new_cursor) {
6404                 case EV_VIEW_CURSOR_NORMAL:
6405                         gdk_window_set_cursor (view->layout.bin_window, NULL);
6406                         break;
6407                 case EV_VIEW_CURSOR_IBEAM:
6408                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
6409                         break;
6410                 case EV_VIEW_CURSOR_LINK:
6411                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
6412                         break;
6413                 case EV_VIEW_CURSOR_WAIT:
6414                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
6415                         break;
6416                 case EV_VIEW_CURSOR_HIDDEN:
6417                         cursor = ev_view_create_invisible_cursor ();
6418                         break;
6419                 case EV_VIEW_CURSOR_DRAG:
6420                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
6421                         break;
6422                 case EV_VIEW_CURSOR_AUTOSCROLL:
6423                         cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW);
6424                         break;
6425         }
6426
6427         if (cursor) {
6428                 gdk_window_set_cursor (view->layout.bin_window, cursor);
6429                 gdk_cursor_unref (cursor);
6430                 gdk_flush();
6431         }
6432 }
6433
6434 void
6435 ev_view_hide_cursor (EvView *view)
6436 {
6437        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
6438 }
6439
6440 void
6441 ev_view_show_cursor (EvView *view)
6442 {
6443        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
6444 }
6445
6446 static void
6447 ev_view_reset_presentation_state (EvView *view)
6448 {
6449         if (!view->presentation ||
6450             view->presentation_state == EV_PRESENTATION_NORMAL)
6451                 return;
6452
6453         view->presentation_state = EV_PRESENTATION_NORMAL;
6454         gdk_window_set_background (view->layout.bin_window,
6455                                    &GTK_WIDGET (view)->style->black);
6456         gtk_widget_queue_draw (GTK_WIDGET (view));
6457 }
6458
6459 gboolean
6460 ev_view_next_page (EvView *view)
6461 {
6462         int page, n_pages;
6463
6464         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6465
6466         if (!view->document)
6467                 return FALSE;
6468
6469         if (view->presentation &&
6470             (view->presentation_state == EV_PRESENTATION_BLACK ||
6471              view->presentation_state == EV_PRESENTATION_WHITE)) {
6472                 ev_view_reset_presentation_state (view);
6473                 return FALSE;
6474         }
6475
6476         if (view->animation) {
6477                 ev_view_transition_animation_cancel (view->animation, view);
6478         }
6479
6480         ev_view_presentation_transition_stop (view);
6481         ev_view_reset_presentation_state (view);
6482
6483         page = ev_document_model_get_page (view->model);
6484         n_pages = ev_document_get_n_pages (view->document);
6485
6486         if (view->dual_page && !view->presentation)
6487                 page = page + 2;
6488         else
6489                 page = page + 1;
6490
6491         if (page < n_pages) {
6492                 ev_document_model_set_page (view->model, page);
6493                 return TRUE;
6494         } else if (view->presentation && page == n_pages) {
6495                 view->presentation_state = EV_PRESENTATION_END;
6496                 gtk_widget_queue_draw (GTK_WIDGET (view));
6497                 return TRUE;
6498         } else if (view->dual_page && page == n_pages) {
6499                 ev_document_model_set_page (view->model, page - 1);
6500                 return TRUE;
6501         } else {
6502                 return FALSE;
6503         }
6504 }
6505
6506 gboolean
6507 ev_view_previous_page (EvView *view)
6508 {
6509         int page;
6510
6511         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
6512
6513         if (!view->document)
6514                 return FALSE;
6515
6516         if (view->presentation &&
6517             view->presentation_state == EV_PRESENTATION_END) {
6518                 ev_view_reset_presentation_state (view);
6519                 return TRUE;
6520         }
6521
6522         if (view->presentation &&
6523             (view->presentation_state == EV_PRESENTATION_BLACK ||
6524              view->presentation_state == EV_PRESENTATION_WHITE)) {
6525                 ev_view_reset_presentation_state (view);
6526                 return FALSE;
6527         }
6528
6529         if (view->animation) {
6530                 ev_view_transition_animation_cancel (view->animation, view);
6531         }
6532
6533         ev_view_reset_presentation_state (view);
6534
6535         page = ev_document_model_get_page (view->model);
6536
6537         if (view->dual_page && !view->presentation)
6538                 page = page - 2;
6539         else
6540                 page = page - 1;
6541
6542         if (page >= 0) {
6543                 ev_document_model_set_page (view->model, page);
6544                 return TRUE;
6545         } else if (view->dual_page && page == -1) {
6546                 ev_document_model_set_page (view->model, 0);
6547                 return TRUE;
6548         } else {
6549                 return FALSE;
6550         }
6551 }
6552