shell/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 <math.h>
  22 #include <string.h>
  23 #include <gtk/gtkalignment.h>
  24 #include <glib/gi18n.h>
  25 #include <gtk/gtkbindings.h>
  26 #include <gtk/gtkselection.h>
  27 #include <gtk/gtkclipboard.h>
  28 #include <gdk/gdkkeysyms.h>
  29 #include <libgnomevfs/gnome-vfs-utils.h>
  30
  31 #include "ev-marshal.h"
  32 #include "ev-view.h"
  33 #include "ev-view-private.h"
  34 #include "ev-utils.h"
  35 #include "ev-selection.h"
  36 #include "ev-document-find.h"
  37 #include "ev-document-misc.h"
  38 #include "ev-debug.h"
  39 #include "ev-job-queue.h"
  40 #include "ev-page-cache.h"
  41 #include "ev-pixbuf-cache.h"
  42 #include "ev-tooltip.h"
  43
  44 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  45 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  46 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  47
  48
  49 enum {
  50         PROP_0,
  51         PROP_STATUS,
  52         PROP_FIND_STATUS,
  53         PROP_CONTINUOUS,
  54         PROP_DUAL_PAGE,
  55         PROP_FULLSCREEN,
  56         PROP_PRESENTATION,
  57         PROP_SIZING_MODE,
  58         PROP_ZOOM,
  59         PROP_ROTATION,
  60         PROP_HAS_SELECTION,
  61 };
  62
  63 enum {
  64         SIGNAL_BINDING_ACTIVATED,
  65         SIGNAL_ZOOM_INVALID,
  66         SIGNAL_EXTERNAL_LINK,
  67         N_SIGNALS,
  68 };
  69
  70 enum {
  71         TARGET_STRING,
  72         TARGET_TEXT,
  73         TARGET_COMPOUND_TEXT,
  74         TARGET_UTF8_STRING,
  75         TARGET_TEXT_BUFFER_CONTENTS
  76 };
  77
  78 static const GtkTargetEntry targets[] = {
  79         { "STRING", 0, TARGET_STRING },
  80         { "TEXT",   0, TARGET_TEXT },
  81         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  82         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  83 };
  84
  85 static guint signals[N_SIGNALS];
  86
  87 typedef enum {
  88         EV_VIEW_FIND_NEXT,
  89         EV_VIEW_FIND_PREV
  90 } EvViewFindDirection;
  91
  92 #define ZOOM_IN_FACTOR  1.2
  93 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  94
  95 #define MIN_SCALE 0.05409
  96 #define MAX_SCALE 4.0
  97
  98 /*** Scrolling ***/
  99 static void       scroll_to_current_page                     (EvView *view,
 100                                                               GtkOrientation orientation);
 101 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 102                                                               GtkAdjustment      *hadjustment,
 103                                                               GtkAdjustment      *vadjustment);
 104 static void       view_update_range_and_current_page         (EvView             *view);
 105 static void       set_scroll_adjustment                      (EvView             *view,
 106                                                               GtkOrientation      orientation,
 107                                                               GtkAdjustment      *adjustment);
 108 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 109                                                               GtkAdjustment      *hadjustment,
 110                                                               GtkAdjustment      *vadjustment);
 111 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 112                                                               guint               keyval,
 113                                                               GtkScrollType       scroll,
 114                                                               gboolean            horizontal);
 115 static void       ev_view_binding_activated                  (EvView             *view,
 116                                                               GtkScrollType       scroll,
 117                                                               gboolean            horizontal);
 118 static void       ensure_rectangle_is_visible                (EvView             *view,
 119                                                               GdkRectangle       *rect);
 120
 121 /*** Geometry computations ***/
 122 static void       compute_border                             (EvView             *view,
 123                                                               int                 width,
 124                                                               int                 height,
 125                                                               GtkBorder          *border);
 126 static void       get_page_y_offset                          (EvView *view,
 127                                                               int page,
 128                                                               double zoom,
 129                                                               int *y_offset);
 130 static gboolean   get_page_extents                           (EvView             *view,
 131                                                               gint                page,
 132                                                               GdkRectangle       *page_area,
 133                                                               GtkBorder          *border);
 134 static void       view_rect_to_doc_rect                      (EvView             *view,
 135                                                               GdkRectangle       *view_rect,
 136                                                               GdkRectangle       *page_area,
 137                                                               EvRectangle        *doc_rect);
 138 static void       doc_rect_to_view_rect                      (EvView             *view,
 139                                                               int                 page,
 140                                                               EvRectangle        *doc_rect,
 141                                                               GdkRectangle       *view_rect);
 142 static void       find_page_at_location                      (EvView             *view,
 143                                                               gdouble             x,
 144                                                               gdouble             y,
 145                                                               gint               *page,
 146                                                               gint               *x_offset,
 147                                                               gint               *y_offset);
 148
 149 /*** Hyperrefs ***/
 150 static EvLink*    get_link_at_location                       (EvView             *view,
 151                                                               gdouble             x,
 152                                                               gdouble             y);
 153 static char*      tip_from_link                              (EvView             *view,
 154                                                               EvLink             *link);
 155 static void       handle_link_over_xy                        (EvView *view,
 156                                                               gint x,
 157                                                               gint y);
 158 /*** GtkWidget implementation ***/
 159 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 160                                                               GtkRequisition     *requisition);
 161 static void       ev_view_size_request_continuous            (EvView             *view,
 162                                                               GtkRequisition     *requisition);
 163 static void       ev_view_size_request_dual_page             (EvView             *view,
 164                                                               GtkRequisition     *requisition);
 165 static void       ev_view_size_request_single_page           (EvView             *view,
 166                                                               GtkRequisition     *requisition);
 167 static void       ev_view_size_request                       (GtkWidget          *widget,
 168                                                               GtkRequisition     *requisition);
 169 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 170                                                               GtkAllocation      *allocation);
 171 static void       ev_view_realize                            (GtkWidget          *widget);
 172 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 173                                                               GdkEventScroll     *event);
 174 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 175                                                               GdkEventExpose     *event);
 176 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 177                                                               GdkEventButton     *event);
 178 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 179                                                               GdkEventMotion     *event);
 180 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 181                                                               GdkEventButton     *event);
 182 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 183                                                               GdkEventCrossing   *event);
 184 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 185                                                               GdkEventCrossing   *event);
 186 static void       ev_view_style_set                          (GtkWidget          *widget,
 187                                                               GtkStyle           *old_style);
 188
 189 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 190
 191 /*** Drawing ***/
 192 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 193 static void       draw_rubberband                            (GtkWidget          *widget,
 194                                                               GdkWindow          *window,
 195                                                               const GdkRectangle *rect,
 196                                                               guchar              alpha);
 197 static void       highlight_find_results                     (EvView             *view,
 198                                                               int                 page);
 199 static void       draw_one_page                              (EvView             *view,
 200                                                               gint                page,
 201                                                               GdkRectangle       *page_area,
 202                                                               GtkBorder          *border,
 203                                                               GdkRectangle       *expose_area);
 204
 205 /*** Callbacks ***/
 206 static void       find_changed_cb                            (EvDocument         *document,
 207                                                               int                 page,
 208                                                               EvView             *view);
 209 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 210                                                               EvView             *view);
 211 static void       page_changed_cb                            (EvPageCache        *page_cache,
 212                                                               int                 new_page,
 213                                                               EvView             *view);
 214 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 215                                                               EvView             *view);
 216
 217 /*** GObject ***/
 218 static void       ev_view_finalize                           (GObject            *object);
 219 static void       ev_view_destroy                            (GtkObject          *object);
 220 static void       ev_view_set_property                       (GObject            *object,
 221                                                               guint               prop_id,
 222                                                               const GValue       *value,
 223                                                               GParamSpec         *pspec);
 224 static void       ev_view_get_property                       (GObject            *object,
 225                                                               guint               prop_id,
 226                                                               GValue             *value,
 227                                                               GParamSpec         *pspec);
 228 static void       ev_view_class_init                         (EvViewClass        *class);
 229 static void       ev_view_init                               (EvView             *view);
 230
 231 /*** Zoom and sizing ***/
 232 static double   zoom_for_size_fit_width                      (int doc_width,
 233                                                               int doc_height,
 234                                                               int target_width,
 235                                                               int target_height,
 236                                                               int vsb_width);
 237 static double   zoom_for_size_fit_height                     (int doc_width,
 238                                                               int doc_height,
 239                                                               int target_width,
 240                                                               int target_height,
 241                                                               int vsb_height);
 242 static double   zoom_for_size_best_fit                       (int doc_width,
 243                                                               int doc_height,
 244                                                               int target_width,
 245                                                               int target_height,
 246                                                               int vsb_width,
 247                                                               int hsb_width);
 248 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 249                                                               int     width,
 250                                                               int     height);
 251 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 252                                                                 int     width,
 253                                                                 int     height,
 254                                                                 int     vsb_width,
 255                                                                 int     hsb_height);
 256 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 257                                                                 int     width,
 258                                                                 int     height,
 259                                                                 int     vsb_width,
 260                                                                 int     hsb_height);
 261 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 262                                                                 int     width,
 263                                                                 int     height,
 264                                                                 int     vsb_width,
 265                                                                 int     hsb_height);
 266 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 267                                                                 int     width,
 268                                                                 int     height,
 269                                                                 int     vsb_width,
 270                                                                 int     hsb_height);
 271 /*** Cursors ***/
 272 static GdkCursor* ev_view_create_invisible_cursor            (void);
 273 static void       ev_view_set_cursor                         (EvView             *view,
 274                                                               EvViewCursor        new_cursor);
 275
 276 /*** Status messages ***/
 277 static void       ev_view_set_status                         (EvView             *view,
 278                                                               const char         *message);
 279 static void       update_find_status_message                 (EvView             *view);
 280 static void       ev_view_set_find_status                    (EvView             *view,
 281                                                               const char         *message);
 282 /*** Find ***/
 283 static void       jump_to_find_result                        (EvView             *view);
 284 static void       jump_to_find_page                          (EvView             *view,
 285                                                               EvViewFindDirection direction);
 286
 287 /*** Selection ***/
 288 static void       compute_selections                         (EvView             *view,
 289                                                               GdkPoint           *start,
 290                                                               GdkPoint           *stop);
 291 static void       clear_selection                            (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
 303 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 304
 305 static void
 306 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 307 {
 308         GdkRectangle page_area;
 309         GtkBorder border;
 310
 311         if (view->document == NULL) {
 312                 return;
 313         }
 314
 315         get_page_extents (view, view->current_page, &page_area, &border);
 316
 317         if (orientation == GTK_ORIENTATION_VERTICAL) {
 318                 if (view->continuous) {
 319                         gtk_adjustment_clamp_page (view->vadjustment,
 320                                                    page_area.y - view->spacing,
 321                                                    page_area.y + view->vadjustment->page_size);
 322                 } else {
 323                         gtk_adjustment_set_value (view->vadjustment,
 324                                                   view->vadjustment->lower);
 325                 }
 326         } else {
 327                 if (view->dual_page) {
 328                         gtk_adjustment_clamp_page (view->hadjustment,
 329                                                    page_area.x,
 330                                                    page_area.x + view->hadjustment->page_size);
 331                 } else {
 332                         gtk_adjustment_set_value (view->hadjustment,
 333                                                   CLAMP (view->hadjustment->value,
 334                                                   view->hadjustment->lower,
 335                                                   view->hadjustment->upper -
 336                                                   view->hadjustment->page_size));
 337                 }
 338         }
 339 }
 340
 341 static void
 342 view_set_adjustment_values (EvView         *view,
 343                             GtkOrientation  orientation)
 344 {
 345         GtkWidget *widget = GTK_WIDGET (view);
 346         GtkAdjustment *adjustment;
 347         int requisition;
 348         int allocation;
 349
 350         double factor;
 351         gint new_value;
 352
 353         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 354                 requisition = widget->requisition.width;
 355                 allocation = widget->allocation.width;
 356                 adjustment = view->hadjustment;
 357         } else {
 358                 requisition = widget->requisition.height;
 359                 allocation = widget->allocation.height;
 360                 adjustment = view->vadjustment;
 361         }
 362
 363         if (!adjustment)
 364                 return;
 365
 366         factor = 1.0;
 367         switch (view->pending_scroll) {
 368                 case SCROLL_TO_KEEP_POSITION:
 369                         factor = (adjustment->value) / adjustment->upper;
 370                         break;
 371                 case SCROLL_TO_CURRENT_PAGE:
 372                         break;
 373                 case SCROLL_TO_CENTER:
 374                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 375                         break;
 376         }
 377
 378         adjustment->page_size = allocation;
 379         adjustment->step_increment = allocation * 0.1;
 380         adjustment->page_increment = allocation * 0.9;
 381         adjustment->lower = 0;
 382         adjustment->upper = MAX (allocation, requisition);
 383
 384         /*
 385          * We add 0.5 to the values before to average out our rounding errors.
 386          */
 387         switch (view->pending_scroll) {
 388                 case SCROLL_TO_KEEP_POSITION:
 389                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 390                         gtk_adjustment_set_value (adjustment, (int)new_value);
 391                         break;
 392                 case SCROLL_TO_CURRENT_PAGE:
 393                         scroll_to_current_page (view, orientation);
 394                         break;
 395                 case SCROLL_TO_CENTER:
 396                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 397                                            0, adjustment->upper - adjustment->page_size);
 398                         gtk_adjustment_set_value (adjustment, (int)new_value);
 399                         break;
 400         }
 401
 402         gtk_adjustment_changed (adjustment);
 403 }
 404
 405 static void
 406 view_update_range_and_current_page (EvView *view)
 407 {
 408         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 409                 return;
 410
 411         /* Presentation trumps all other modes */
 412         if (view->presentation) {
 413                 view->start_page = view->current_page;
 414                 view->end_page = view->current_page;
 415         } else if (view->continuous) {
 416                 GdkRectangle current_area, unused, page_area;
 417                 GtkBorder border;
 418                 gint current_page;
 419                 gboolean found = FALSE;
 420                 int i;
 421
 422                 if (!(view->vadjustment && view->hadjustment))
 423                         return;
 424
 425                 current_area.x = view->hadjustment->value;
 426                 current_area.width = view->hadjustment->upper;
 427                 current_area.y = view->vadjustment->value;
 428                 current_area.height = view->vadjustment->page_size;
 429
 430                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 431
 432                         get_page_extents (view, i, &page_area, &border);
 433
 434                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 435                                 if (! found) {
 436                                         view->start_page = i;
 437                                         found = TRUE;
 438
 439                                 }
 440                                 view->end_page = i;
 441                         } else if (found) {
 442                                 break;
 443                         }
 444                 }
 445
 446                 current_page = ev_page_cache_get_current_page (view->page_cache);
 447
 448                 if (current_page < view->start_page || current_page > view->end_page) {
 449                         view->current_page = view->start_page;
 450                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 451                 }
 452         } else {
 453                 if (view->dual_page) {
 454                         if (view->current_page % 2 == 0) {
 455                                 view->start_page = view->current_page;
 456                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 457                                         view->end_page = view->start_page + 1;
 458                                 else
 459                                         view->end_page = view->start_page;
 460                         } else {
 461                                 view->start_page = view->current_page - 1;
 462                                 view->end_page = view->current_page;
 463                         }
 464                 } else {
 465                         view->start_page = view->current_page;
 466                         view->end_page = view->current_page;
 467                 }
 468         }
 469
 470         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 471                                         view->start_page,
 472                                         view->end_page,
 473                                         view->rotation,
 474                                         view->scale,
 475                                         view->selection_info.selections);
 476 }
 477
 478 static void
 479 set_scroll_adjustment (EvView *view,
 480                        GtkOrientation  orientation,
 481                        GtkAdjustment  *adjustment)
 482 {
 483         GtkAdjustment **to_set;
 484
 485         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 486                 to_set = &view->hadjustment;
 487         else
 488                 to_set = &view->vadjustment;
 489
 490         if (*to_set != adjustment) {
 491                 if (*to_set) {
 492                         g_signal_handlers_disconnect_by_func (*to_set,
 493                                                               (gpointer) on_adjustment_value_changed,
 494                                                               view);
 495                         g_object_unref (*to_set);
 496                 }
 497
 498                 *to_set = adjustment;
 499                 view_set_adjustment_values (view, orientation);
 500
 501                 if (*to_set) {
 502                         g_object_ref (*to_set);
 503                         g_signal_connect (*to_set, "value_changed",
 504                                           G_CALLBACK (on_adjustment_value_changed), view);
 505                 }
 506         }
 507 }
 508
 509 static void
 510 ev_view_set_scroll_adjustments (EvView *view,
 511                                 GtkAdjustment  *hadjustment,
 512                                 GtkAdjustment  *vadjustment)
 513 {
 514         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 515         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 516
 517         on_adjustment_value_changed (NULL, view);
 518 }
 519
 520 static void
 521 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 522                            guint           keyval,
 523                            GtkScrollType   scroll,
 524                            gboolean        horizontal)
 525 {
 526   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 527
 528   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 529                                 "binding_activated", 2,
 530                                 GTK_TYPE_SCROLL_TYPE, scroll,
 531                                 G_TYPE_BOOLEAN, horizontal);
 532   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 533                                 "binding_activated", 2,
 534                                 GTK_TYPE_SCROLL_TYPE, scroll,
 535                                 G_TYPE_BOOLEAN, horizontal);
 536 }
 537
 538 void
 539 ev_view_scroll (EvView        *view,
 540                 EvScrollType   scroll)
 541 {
 542         GtkAdjustment *adjustment;
 543         double value, increment;
 544         gboolean first_page = FALSE;
 545         gboolean last_page = FALSE;
 546
 547         /* Assign values for increment and vertical adjustment */
 548         adjustment = view->vadjustment;
 549         increment = adjustment->page_size * 0.75;
 550         value = adjustment->value;
 551
 552         /* Assign boolean for first and last page */
 553         if (view->current_page == 0)
 554                 first_page = TRUE;
 555         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 556                 last_page = TRUE;
 557
 558         switch (scroll) {
 559                 case EV_SCROLL_PAGE_BACKWARD:
 560                         /* Do not jump backwards if at the first page */
 561                         if (value == (adjustment->lower) && first_page) {
 562                                 /* Do nothing */
 563                                 /* At the top of a page, assign the upper bound limit of previous page */
 564                         } else if (value == (adjustment->lower)) {
 565                                 value = adjustment->upper - adjustment->page_size;
 566                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 567                                 /* Jump to the top */
 568                         } else {
 569                                 value = MAX (value - increment, adjustment->lower);
 570                         }
 571                         break;
 572                 case EV_SCROLL_PAGE_FORWARD:
 573                         /* Do not jump forward if at the last page */
 574                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 575                                 /* Do nothing */
 576                         /* At the bottom of a page, assign the lower bound limit of next page */
 577                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 578                                 value = 0;
 579                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 580                         /* Jump to the bottom */
 581                         } else {
 582                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 583                         }
 584                         break;
 585                 default:
 586                         break;
 587         }
 588
 589         gtk_adjustment_set_value (adjustment, value);
 590 }
 591
 592 static void
 593 ev_view_binding_activated (EvView *view,
 594                            GtkScrollType scroll,
 595                            gboolean horizontal)
 596 {
 597         GtkAdjustment *adjustment;
 598         double value;
 599
 600         if (view->presentation) {
 601                 switch (scroll) {
 602                         case GTK_SCROLL_STEP_BACKWARD:
 603                                 ev_view_previous_page (view);
 604                                 break;
 605                         case GTK_SCROLL_STEP_FORWARD:
 606                                 ev_view_next_page (view);
 607                                 break;
 608                         default:
 609                                 break;
 610                 }
 611                 return;
 612         }
 613
 614         if (horizontal) {
 615                 adjustment = view->hadjustment;
 616         } else {
 617                 adjustment = view->vadjustment;
 618         }
 619
 620         value = adjustment->value;
 621
 622         switch (scroll) {
 623                 case GTK_SCROLL_STEP_BACKWARD:
 624                         value -= adjustment->step_increment;
 625                         break;
 626                 case GTK_SCROLL_STEP_FORWARD:
 627                         value += adjustment->step_increment;
 628                         break;
 629                 default:
 630                         break;
 631         }
 632
 633         value = CLAMP (value, adjustment->lower,
 634                        adjustment->upper - adjustment->page_size);
 635
 636         gtk_adjustment_set_value (adjustment, value);
 637 }
 638
 639 #define MARGIN 5
 640
 641 static void
 642 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 643 {
 644         GtkWidget *widget = GTK_WIDGET (view);
 645         GtkAdjustment *adjustment;
 646         int value;
 647
 648         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 649
 650         adjustment = view->vadjustment;
 651
 652         if (rect->y < adjustment->value) {
 653                 value = MAX (adjustment->lower, rect->y - MARGIN);
 654                 gtk_adjustment_set_value (view->vadjustment, value);
 655         } else if (rect->y + rect->height >
 656                    adjustment->value + widget->allocation.height) {
 657                 value = MIN (adjustment->upper, rect->y + rect->height -
 658                              widget->allocation.height + MARGIN);
 659                 gtk_adjustment_set_value (view->vadjustment, value);
 660         }
 661
 662         adjustment = view->hadjustment;
 663
 664         if (rect->x < adjustment->value) {
 665                 value = MAX (adjustment->lower, rect->x - MARGIN);
 666                 gtk_adjustment_set_value (view->hadjustment, value);
 667         } else if (rect->x + rect->height >
 668                    adjustment->value + widget->allocation.width) {
 669                 value = MIN (adjustment->upper, rect->x + rect->width -
 670                              widget->allocation.width + MARGIN);
 671                 gtk_adjustment_set_value (view->hadjustment, value);
 672         }
 673 }
 674
 675 /*** Geometry computations ***/
 676
 677 static void
 678 compute_border (EvView *view, int width, int height, GtkBorder *border)
 679 {
 680         if (view->presentation) {
 681                 border->left = 0;
 682                 border->right = 0;
 683                 border->top = 0;
 684                 border->bottom = 0;
 685         } else {
 686                 ev_document_misc_get_page_border_size (width, height, border);
 687         }
 688 }
 689
 690 static void
 691 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 692 {
 693         int max_width, offset;
 694         GtkBorder border;
 695
 696         g_return_if_fail (y_offset != NULL);
 697
 698         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 699
 700         compute_border (view, max_width, max_width, &border);
 701
 702         if (view->dual_page) {
 703                 ev_page_cache_get_height_to_page (view->page_cache, page,
 704                                                   view->rotation, zoom, NULL, &offset);
 705                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 706         } else {
 707                 ev_page_cache_get_height_to_page (view->page_cache, page,
 708                                                   view->rotation, zoom, &offset, NULL);
 709                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 710         }
 711
 712         *y_offset = offset;
 713         return;
 714 }
 715
 716 static gboolean
 717 get_page_extents (EvView       *view,
 718                   gint          page,
 719                   GdkRectangle *page_area,
 720                   GtkBorder    *border)
 721 {
 722         GtkWidget *widget;
 723         int width, height;
 724
 725         widget = GTK_WIDGET (view);
 726
 727         /* Get the size of the page */
 728         ev_page_cache_get_size (view->page_cache, page,
 729                                 view->rotation,
 730                                 view->scale,
 731                                 &width, &height);
 732         compute_border (view, width, height, border);
 733         page_area->width = width + border->left + border->right;
 734         page_area->height = height + border->top + border->bottom;
 735
 736         if (view->presentation) {
 737                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 738                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 739         } else if (view->continuous) {
 740                 gint max_width;
 741                 gint x, y;
 742
 743                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 744                                              view->scale, &max_width);
 745                 max_width = max_width + border->left + border->right;
 746                 /* Get the location of the bounding box */
 747                 if (view->dual_page) {
 748                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 749                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 750                         if (page % 2 == 0)
 751                                 x = x + (max_width - width - border->left - border->right);
 752                 } else {
 753                         x = view->spacing;
 754                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 755                 }
 756
 757                 get_page_y_offset (view, page, view->scale, &y);
 758
 759                 page_area->x = x;
 760                 page_area->y = y;
 761         } else {
 762                 gint x, y;
 763                 if (view->dual_page) {
 764                         gint width_2, height_2;
 765                         gint max_width = width;
 766                         gint max_height = height;
 767                         GtkBorder overall_border;
 768                         gint other_page;
 769
 770                         other_page = page ^ 1;
 771
 772                         /* First, we get the bounding box of the two pages */
 773                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 774                                 ev_page_cache_get_size (view->page_cache,
 775                                                         other_page,
 776                                                         view->rotation,
 777                                                         view->scale,
 778                                                         &width_2, &height_2);
 779                                 if (width_2 > width)
 780                                         max_width = width_2;
 781                                 if (height_2 > height)
 782                                         max_height = height_2;
 783                         }
 784                         compute_border (view, max_width, max_height, &overall_border);
 785
 786                         /* Find the offsets */
 787                         x = view->spacing;
 788                         y = view->spacing;
 789
 790                         /* Adjust for being the left or right page */
 791                         if (page % 2 == 0)
 792                                 x = x + max_width - width;
 793                         else
 794                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 795
 796                         y = y + (max_height - height)/2;
 797
 798                         /* Adjust for extra allocation */
 799                         x = x + MAX (0, widget->allocation.width -
 800                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 801                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 802                 } else {
 803                         x = view->spacing;
 804                         y = view->spacing;
 805
 806                         /* Adjust for extra allocation */
 807                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 808                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 809                 }
 810
 811                 page_area->x = x;
 812                 page_area->y = y;
 813         }
 814
 815         return TRUE;
 816 }
 817
 818 static void
 819 view_point_to_doc_point (EvView *view,
 820                          GdkPoint *view_point,
 821                          GdkRectangle *page_area,
 822                          double  *doc_point_x,
 823                          double  *doc_point_y)
 824 {
 825         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 826         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 827 }
 828
 829 static void
 830 view_rect_to_doc_rect (EvView *view,
 831                        GdkRectangle *view_rect,
 832                        GdkRectangle *page_area,
 833                        EvRectangle  *doc_rect)
 834 {
 835         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 836         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 837         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 838         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 839 }
 840
 841 static gboolean
 842 doc_point_to_view_point (EvView       *view,
 843                          int           page,
 844                          EvPoint      *doc_point,
 845                          GdkPoint     *view_point)
 846 {
 847         GdkRectangle page_area;
 848         GtkBorder border;
 849         double x, y, view_x, view_y;
 850         int width, height;
 851
 852         ev_page_cache_get_size (view->page_cache, page,
 853                                 view->rotation,
 854                                 1.0,
 855                                 &width, &height);
 856
 857         if (view->rotation == 0) {
 858                 x = doc_point->x;
 859                 y = doc_point->y;
 860         } else if (view->rotation == 90) {
 861                 x = width - doc_point->y;
 862                 y = doc_point->x;
 863         } else if (view->rotation == 180) {
 864                 x = width - doc_point->x;
 865                 y = height - doc_point->y;
 866         } else if (view->rotation == 270) {
 867                 x = doc_point->y;
 868                 y = height - doc_point->x;
 869         } else {
 870                 g_assert_not_reached ();
 871         }
 872
 873         get_page_extents (view, page, &page_area, &border);
 874
 875         view_x = x * view->scale;
 876         view_y = y * view->scale;
 877         view_point->x = view_x + page_area.x;
 878         view_point->y = view_y + page_area.y;
 879
 880         return (view_x > 0 && view_x <= page_area.width &&
 881                 view_y > 0 && view_y <= page_area.height);
 882 }
 883
 884 static void
 885 doc_rect_to_view_rect (EvView       *view,
 886                        int           page,
 887                        EvRectangle  *doc_rect,
 888                        GdkRectangle *view_rect)
 889 {
 890         GdkRectangle page_area;
 891         GtkBorder border;
 892         double x, y, w, h;
 893         int width, height;
 894
 895         ev_page_cache_get_size (view->page_cache, page,
 896                                 view->rotation,
 897                                 1.0,
 898                                 &width, &height);
 899
 900         if (view->rotation == 0) {
 901                 x = doc_rect->x1;
 902                 y = doc_rect->y1;
 903                 w = doc_rect->x2 - doc_rect->x1;
 904                 h = doc_rect->y2 - doc_rect->y1;
 905         } else if (view->rotation == 90) {
 906                 x = width - doc_rect->y2;
 907                 y = doc_rect->x1;
 908                 w = doc_rect->y2 - doc_rect->y1;
 909                 h = doc_rect->x2 - doc_rect->x1;
 910         } else if (view->rotation == 180) {
 911                 x = width - doc_rect->x2;
 912                 y = height - doc_rect->y2;
 913                 w = doc_rect->x2 - doc_rect->x1;
 914                 h = doc_rect->y2 - doc_rect->y1;
 915         } else if (view->rotation == 270) {
 916                 x = doc_rect->y1;
 917                 y = height - doc_rect->x2;
 918                 w = doc_rect->y2 - doc_rect->y1;
 919                 h = doc_rect->x2 - doc_rect->x1;
 920         } else {
 921                 g_assert_not_reached ();
 922         }
 923
 924         get_page_extents (view, page, &page_area, &border);
 925
 926         view_rect->x = x * view->scale + page_area.x;
 927         view_rect->y = y * view->scale + page_area.y;
 928         view_rect->width = w * view->scale;
 929         view_rect->height = h * view->scale;
 930 }
 931
 932 static void
 933 find_page_at_location (EvView  *view,
 934                        gdouble  x,
 935                        gdouble  y,
 936                        gint    *page,
 937                        gint    *x_offset,
 938                        gint    *y_offset)
 939 {
 940         int i;
 941
 942         if (view->document == NULL)
 943                 return;
 944
 945         g_assert (page);
 946         g_assert (x_offset);
 947         g_assert (y_offset);
 948
 949         for (i = view->start_page; i <= view->end_page; i++) {
 950                 GdkRectangle page_area;
 951                 GtkBorder border;
 952
 953                 if (! get_page_extents (view, i, &page_area, &border))
 954                         continue;
 955
 956                 if ((x >= page_area.x + border.left) &&
 957                     (x < page_area.x + page_area.width - border.right) &&
 958                     (y >= page_area.y + border.top) &&
 959                     (y < page_area.y + page_area.height - border.bottom)) {
 960                         *page = i;
 961                         *x_offset = x - (page_area.x + border.left);
 962                         *y_offset = y - (page_area.y + border.top);
 963                         return;
 964                 }
 965         }
 966
 967         *page = -1;
 968 }
 969
 970 static gboolean
 971 location_in_text (EvView  *view,
 972                   gdouble  x,
 973                   gdouble  y)
 974 {
 975         GdkRegion *region;
 976         gint page = -1;
 977         gint x_offset = 0, y_offset = 0;
 978
 979         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 980
 981         if (page == -1)
 982                 return FALSE;
 983
 984         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 985
 986         if (region)
 987                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
 988         else
 989                 return FALSE;
 990 }
 991
 992 static int
 993 ev_view_get_width (EvView *view)
 994 {
 995         return GTK_WIDGET (view)->allocation.width;
 996 }
 997
 998 static int
 999 ev_view_get_height (EvView *view)
1000 {
1001         return GTK_WIDGET (view)->allocation.height;
1002 }
1003
1004 static gboolean
1005 location_in_selected_text (EvView  *view,
1006                            gdouble  x,
1007                            gdouble  y)
1008 {
1009         gint page = -1;
1010         gint x_offset = 0, y_offset = 0;
1011         EvViewSelection *selection;
1012         GList *l = NULL;
1013
1014         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1015                 selection = (EvViewSelection *)l->data;
1016
1017                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1018
1019                 if (page != selection->page)
1020                         continue;
1021
1022                 if (selection->covered_region &&
1023                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1024                         return TRUE;
1025         }
1026
1027         return FALSE;
1028 }
1029
1030 /*** Hyperref ***/
1031 static EvLink *
1032 get_link_at_location (EvView  *view,
1033                       gdouble  x,
1034                       gdouble  y)
1035 {
1036         gint page = -1;
1037         gint x_offset = 0, y_offset = 0;
1038         GList *link_mapping;
1039
1040         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1041
1042         if (page == -1)
1043                 return NULL;
1044
1045         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1046
1047         if (link_mapping)
1048                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1049         else
1050                 return NULL;
1051 }
1052
1053 static void
1054 goto_fitr_link (EvView *view, EvLink *link)
1055 {
1056         GdkPoint view_point;
1057         EvPoint doc_point;
1058         int doc_width, doc_height, page;
1059         double zoom;
1060
1061         page = ev_link_get_page (link);
1062         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1063
1064         doc_point.x = ev_link_get_left (link);
1065         doc_point.y = ev_link_get_top (link);
1066
1067         zoom = zoom_for_size_best_fit (ev_link_get_right (link) - ev_link_get_left (link),
1068                                        ev_link_get_top (link) - ev_link_get_bottom (link),
1069                                        ev_view_get_width (view),
1070                                        ev_view_get_height (view), 0, 0);
1071
1072         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1073         ev_view_set_zoom (view, zoom, FALSE);
1074         ev_page_cache_set_current_page (view->page_cache, page);
1075
1076         if (doc_point_to_view_point (view, page, &doc_point, &view_point)) {
1077                 gtk_adjustment_set_value (view->hadjustment, view_point.x);
1078                 gtk_adjustment_set_value (view->vadjustment, view_point.y);
1079         }
1080 }
1081
1082 static void
1083 goto_fitv_link (EvView *view, EvLink *link)
1084 {
1085         GdkPoint view_point;
1086         EvPoint doc_point;
1087         int doc_width, doc_height, page;
1088         double zoom;
1089
1090         page = ev_link_get_page (link);
1091         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1092
1093         doc_point.x = ev_link_get_left (link);
1094         doc_point.y = 0;
1095
1096         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1097                                          ev_view_get_width (view),
1098                                          ev_view_get_height (view), 0);
1099
1100         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1101         ev_view_set_zoom (view, zoom, FALSE);
1102         ev_page_cache_set_current_page (view->page_cache, page);
1103
1104         if (doc_point_to_view_point (view, page, &doc_point, &view_point)) {
1105                 gtk_adjustment_set_value (view->hadjustment, view_point.x);
1106         }
1107 }
1108
1109 static void
1110 goto_fith_link (EvView *view, EvLink *link)
1111 {
1112         GdkPoint view_point;
1113         EvPoint doc_point;
1114         int doc_width, doc_height, page;
1115         double zoom;
1116
1117         page = ev_link_get_page (link);
1118         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1119
1120         doc_point.x = 0;
1121         doc_point.y = doc_height - ev_link_get_top (link);
1122
1123         zoom = zoom_for_size_fit_width (doc_width, ev_link_get_top (link),
1124                                         ev_view_get_width (view),
1125                                         ev_view_get_height (view), 0);
1126
1127         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1128         ev_view_set_zoom (view, zoom, FALSE);
1129
1130         if (doc_point_to_view_point (view, page, &doc_point, &view_point)) {
1131                 gtk_adjustment_set_value (view->vadjustment, view_point.y);
1132         } else {
1133                 ev_page_cache_set_current_page (view->page_cache, page);
1134         }
1135 }
1136
1137 static void
1138 goto_fit_link (EvView *view, EvLink *link)
1139 {
1140         double zoom;
1141         int doc_width, doc_height;
1142         int page;
1143
1144         page = ev_link_get_page (link);
1145         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1146
1147         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1148                                        ev_view_get_height (view), 0, 0);
1149
1150         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1151         ev_view_set_zoom (view, zoom, FALSE);
1152         ev_page_cache_set_current_page (view->page_cache, page);
1153 }
1154
1155 static void
1156 goto_xyz_link (EvView *view, EvLink *link)
1157 {
1158         GdkPoint view_point;
1159         EvPoint doc_point;
1160         int height, page;
1161         double zoom;
1162
1163         zoom = ev_link_get_zoom (link);
1164         page = ev_link_get_page (link);
1165         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, NULL, &height);
1166
1167         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1168         if (zoom != 0) {
1169                 ev_view_set_zoom (view, zoom, FALSE);
1170         }
1171
1172         doc_point.x = ev_link_get_left (link);
1173         doc_point.y = height - ev_link_get_top (link);
1174
1175         if (doc_point_to_view_point (view, page, &doc_point, &view_point)) {
1176                 gtk_adjustment_set_value (view->hadjustment, view_point.x);
1177                 gtk_adjustment_set_value (view->vadjustment, view_point.y);
1178         } else {
1179                 ev_page_cache_set_current_page (view->page_cache, page);
1180         }
1181 }
1182
1183 void
1184 ev_view_goto_link (EvView *view, EvLink *link)
1185 {
1186         EvLinkType type;
1187         int page;
1188
1189         type = ev_link_get_link_type (link);
1190
1191         switch (type) {
1192                 case EV_LINK_TYPE_TITLE:
1193                         break;
1194                 case EV_LINK_TYPE_PAGE:
1195                         page = ev_link_get_page (link);
1196                         ev_page_cache_set_current_page (view->page_cache, page);
1197                         break;
1198                 case EV_LINK_TYPE_PAGE_FIT:
1199                         goto_fit_link (view, link);
1200                         break;
1201                 case EV_LINK_TYPE_PAGE_FITH:
1202                         goto_fith_link (view, link);
1203                         break;
1204                 case EV_LINK_TYPE_PAGE_FITV:
1205                         goto_fitv_link (view, link);
1206                         break;
1207                 case EV_LINK_TYPE_PAGE_FITR:
1208                         goto_fitr_link (view, link);
1209                         break;
1210                 case EV_LINK_TYPE_PAGE_XYZ:
1211                         goto_xyz_link (view, link);
1212                         break;
1213                 case EV_LINK_TYPE_EXTERNAL_URI:
1214                 case EV_LINK_TYPE_LAUNCH:
1215                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, link);
1216                         break;
1217         }
1218 }
1219
1220 static char *
1221 tip_from_link (EvView *view, EvLink *link)
1222 {
1223         EvLinkType type;
1224         char *msg = NULL;
1225         char *page_label;
1226
1227         type = ev_link_get_link_type (link);
1228
1229         switch (type) {
1230                 case EV_LINK_TYPE_TITLE:
1231                         if (ev_link_get_title (link))
1232                                 msg = g_strdup (ev_link_get_title (link));
1233                         break;
1234                 case EV_LINK_TYPE_PAGE:
1235                 case EV_LINK_TYPE_PAGE_XYZ:
1236                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1237                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1238                         g_free (page_label);
1239                         break;
1240                 case EV_LINK_TYPE_EXTERNAL_URI:
1241                         msg = g_strdup (ev_link_get_uri (link));
1242                         break;
1243                 default:
1244                         break;
1245         }
1246
1247         return msg;
1248 }
1249
1250 static void
1251 handle_link_over_xy (EvView *view, gint x, gint y)
1252 {
1253         EvLink *link;
1254
1255         link = get_link_at_location (view, x + view->scroll_x, y + view->scroll_y);
1256
1257         if (view->link_tooltip == NULL) {
1258                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1259         }
1260
1261         if (view->hovered_link != link) {
1262                 view->hovered_link = link;
1263                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1264         }
1265
1266         if (link) {
1267                 char *msg = tip_from_link (view, link);
1268
1269                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1270                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1271
1272                         ev_tooltip_set_position (tooltip, x, y);
1273                         ev_tooltip_set_text (tooltip, msg);
1274                         ev_tooltip_activate (tooltip);
1275                 }
1276                 g_free (msg);
1277
1278                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1279         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1280                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1281         } else {
1282                 ev_view_set_status (view, NULL);
1283                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1284                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1285                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1286         }
1287         return;
1288 }
1289
1290 /*** GtkWidget implementation ***/
1291
1292 static void
1293 ev_view_size_request_continuous_dual_page (EvView         *view,
1294                                            GtkRequisition *requisition)
1295 {
1296         int max_width;
1297         gint n_pages;
1298         GtkBorder border;
1299
1300         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1301                                      view->scale, &max_width);
1302         compute_border (view, max_width, max_width, &border);
1303
1304         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1305
1306         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1307         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1308
1309         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1310                 requisition->width = 1;
1311         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1312                 requisition->width = 1;
1313                 /* FIXME: This could actually be set on one page docs or docs
1314                  * with a strange aspect ratio. */
1315                 /* requisition->height = 1;*/
1316         }
1317 }
1318
1319 static void
1320 ev_view_size_request_continuous (EvView         *view,
1321                                  GtkRequisition *requisition)
1322 {
1323         int max_width;
1324         int n_pages;
1325         GtkBorder border;
1326
1327
1328         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1329                                      view->scale, &max_width);
1330         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1331         compute_border (view, max_width, max_width, &border);
1332
1333         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1334         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1335
1336         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1337                 requisition->width = 1;
1338         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1339                 requisition->width = 1;
1340                 /* FIXME: This could actually be set on one page docs or docs
1341                  * with a strange aspect ratio. */
1342                 /* requisition->height = 1;*/
1343         }
1344 }
1345
1346 static void
1347 ev_view_size_request_dual_page (EvView         *view,
1348                                 GtkRequisition *requisition)
1349 {
1350         GtkBorder border;
1351         gint width, height;
1352
1353         /* Find the largest of the two. */
1354         ev_page_cache_get_size (view->page_cache,
1355                                 view->current_page,
1356                                 view->rotation,
1357                                 view->scale,
1358                                 &width, &height);
1359         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1360                 gint width_2, height_2;
1361                 ev_page_cache_get_size (view->page_cache,
1362                                         view->current_page + 1,
1363                                         view->rotation,
1364                                         view->scale,
1365                                         &width_2, &height_2);
1366                 if (width_2 > width) {
1367                         width = width_2;
1368                         height = height_2;
1369                 }
1370         }
1371         compute_border (view, width, height, &border);
1372
1373         requisition->width = ((width + border.left + border.right) * 2) +
1374                 (view->spacing * 3);
1375         requisition->height = (height + border.top + border.bottom) +
1376                 (view->spacing * 2);
1377
1378         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1379                 requisition->width = 1;
1380         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1381                 requisition->width = 1;
1382                 requisition->height = 1;
1383         }
1384 }
1385
1386 static void
1387 ev_view_size_request_single_page (EvView         *view,
1388                                   GtkRequisition *requisition)
1389 {
1390         GtkBorder border;
1391         gint width, height;
1392
1393         ev_page_cache_get_size (view->page_cache,
1394                                 view->current_page,
1395                                 view->rotation,
1396                                 view->scale,
1397                                 &width, &height);
1398         compute_border (view, width, height, &border);
1399
1400         requisition->width = width + border.left + border.right + (2 * view->spacing);
1401         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1402
1403         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1404                 requisition->width = 1;
1405                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1406         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1407                 requisition->width = 1;
1408                 requisition->height = 1;
1409         }
1410 }
1411
1412 static void
1413 ev_view_size_request (GtkWidget      *widget,
1414                       GtkRequisition *requisition)
1415 {
1416         EvView *view = EV_VIEW (widget);
1417
1418         if (view->document == NULL) {
1419                 requisition->width = 1;
1420                 requisition->height = 1;
1421                 return;
1422         }
1423
1424         if (view->presentation) {
1425                 requisition->width = 1;
1426                 requisition->height = 1;
1427                 return;
1428         }
1429
1430         if (view->continuous && view->dual_page)
1431                 ev_view_size_request_continuous_dual_page (view, requisition);
1432         else if (view->continuous)
1433                 ev_view_size_request_continuous (view, requisition);
1434         else if (view->dual_page)
1435                 ev_view_size_request_dual_page (view, requisition);
1436         else
1437                 ev_view_size_request_single_page (view, requisition);
1438 }
1439
1440 static void
1441 ev_view_size_allocate (GtkWidget      *widget,
1442                        GtkAllocation  *allocation)
1443 {
1444         EvView *view = EV_VIEW (widget);
1445
1446         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1447             view->sizing_mode == EV_SIZING_BEST_FIT) {
1448
1449                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1450
1451                 ev_view_size_request (widget, &widget->requisition);
1452         }
1453
1454         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1455         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1456
1457         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1458         view->pending_resize = FALSE;
1459
1460         if (view->document)
1461                 view_update_range_and_current_page (view);
1462
1463         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1464 }
1465
1466 static void
1467 ev_view_realize (GtkWidget *widget)
1468 {
1469         EvView *view = EV_VIEW (widget);
1470         GdkWindowAttr attributes;
1471
1472         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1473
1474
1475         attributes.window_type = GDK_WINDOW_CHILD;
1476         attributes.wclass = GDK_INPUT_OUTPUT;
1477         attributes.visual = gtk_widget_get_visual (widget);
1478         attributes.colormap = gtk_widget_get_colormap (widget);
1479
1480         attributes.x = widget->allocation.x;
1481         attributes.y = widget->allocation.y;
1482         attributes.width = widget->allocation.width;
1483         attributes.height = widget->allocation.height;
1484         attributes.event_mask = GDK_EXPOSURE_MASK |
1485                                 GDK_BUTTON_PRESS_MASK |
1486                                 GDK_BUTTON_RELEASE_MASK |
1487                                 GDK_SCROLL_MASK |
1488                                 GDK_KEY_PRESS_MASK |
1489                                 GDK_POINTER_MOTION_MASK |
1490                                 GDK_ENTER_NOTIFY_MASK |
1491                                 GDK_LEAVE_NOTIFY_MASK;
1492
1493         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1494                                          &attributes,
1495                                          GDK_WA_X | GDK_WA_Y |
1496                                          GDK_WA_COLORMAP |
1497                                          GDK_WA_VISUAL);
1498         gdk_window_set_user_data (widget->window, widget);
1499         widget->style = gtk_style_attach (widget->style, widget->window);
1500
1501         if (view->presentation)
1502                 gdk_window_set_background (widget->window, &widget->style->black);
1503         else
1504                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1505 }
1506
1507 static gboolean
1508 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1509 {
1510         EvView *view = EV_VIEW (widget);
1511         guint state;
1512
1513         state = event->state & gtk_accelerator_get_default_mod_mask ();
1514
1515         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1516                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1517
1518                 if (event->direction == GDK_SCROLL_UP ||
1519                     event->direction == GDK_SCROLL_LEFT) {
1520                         if (ev_view_can_zoom_in (view)) {
1521                                 ev_view_zoom_in (view);
1522                         }
1523                 } else {
1524                         if (ev_view_can_zoom_out (view)) {
1525                                 ev_view_zoom_out (view);
1526                         }
1527                 }
1528
1529                 return TRUE;
1530         }
1531
1532         /* Shift+Wheel scrolls the in the perpendicular direction */
1533         if (state & GDK_SHIFT_MASK) {
1534                 if (event->direction == GDK_SCROLL_UP)
1535                         event->direction = GDK_SCROLL_LEFT;
1536                 if (event->direction == GDK_SCROLL_LEFT)
1537                         event->direction = GDK_SCROLL_UP;
1538                 if (event->direction == GDK_SCROLL_DOWN)
1539                         event->direction = GDK_SCROLL_RIGHT;
1540                 if (event->direction == GDK_SCROLL_RIGHT)
1541                         event->direction = GDK_SCROLL_DOWN;
1542
1543                 event->state &= ~GDK_SHIFT_MASK;
1544                 state &= ~GDK_SHIFT_MASK;
1545         }
1546
1547         if (state == 0 && view->presentation) {
1548                 switch (event->direction) {
1549                 case GDK_SCROLL_DOWN:
1550                 case GDK_SCROLL_RIGHT:
1551                         ev_view_next_page (view);
1552                         break;
1553                 case GDK_SCROLL_UP:
1554                 case GDK_SCROLL_LEFT:
1555                         ev_view_previous_page (view);
1556                         break;
1557                 }
1558
1559                 return TRUE;
1560         }
1561
1562         return FALSE;
1563 }
1564
1565 static EvViewSelection *
1566 find_selection_for_page (EvView *view,
1567                          gint    page)
1568 {
1569         GList *list;
1570
1571         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1572                 EvViewSelection *selection;
1573
1574                 selection = (EvViewSelection *) list->data;
1575
1576                 if (selection->page == page)
1577                         return selection;
1578         }
1579
1580         return NULL;
1581 }
1582
1583 static gboolean
1584 ev_view_expose_event (GtkWidget      *widget,
1585                       GdkEventExpose *event)
1586 {
1587         EvView *view = EV_VIEW (widget);
1588         int i;
1589
1590         if (view->document == NULL)
1591                 return FALSE;
1592
1593         for (i = view->start_page; i <= view->end_page; i++) {
1594                 GdkRectangle page_area;
1595                 GtkBorder border;
1596
1597                 if (!get_page_extents (view, i, &page_area, &border))
1598                         continue;
1599
1600                 page_area.x -= view->scroll_x;
1601                 page_area.y -= view->scroll_y;
1602
1603                 draw_one_page (view, i, &page_area, &border, &(event->area));
1604
1605                 if (EV_IS_DOCUMENT_FIND (view->document))
1606                         highlight_find_results (view, i);
1607         }
1608
1609         return FALSE;
1610 }
1611
1612 static gboolean
1613 ev_view_button_press_event (GtkWidget      *widget,
1614                             GdkEventButton *event)
1615 {
1616         EvView *view = EV_VIEW (widget);
1617
1618         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1619                 gtk_widget_grab_focus (widget);
1620         }
1621
1622         view->pressed_button = event->button;
1623         view->selection_info.in_drag = FALSE;
1624
1625         switch (event->button) {
1626                 case 1:
1627                         if (view->selection_info.selections) {
1628                                 if (location_in_selected_text (view,
1629                                                                event->x + view->scroll_x,
1630                                                                event->y + view->scroll_y)) {
1631                                         view->selection_info.in_drag = TRUE;
1632                                 } else {
1633                                         clear_selection (view);
1634                                 }
1635
1636                                 gtk_widget_queue_draw (widget);
1637                         }
1638
1639                         view->selection_info.start.x = event->x + view->scroll_x;
1640                         view->selection_info.start.y = event->y + view->scroll_y;
1641
1642                         return TRUE;
1643                 case 2:
1644                         /* use root coordinates as reference point because
1645                          * scrolling changes window relative coordinates */
1646                         view->drag_info.start.x = event->x_root;
1647                         view->drag_info.start.y = event->y_root;
1648                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1649                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1650
1651                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1652
1653                         return TRUE;
1654         }
1655
1656         return FALSE;
1657 }
1658
1659 static void
1660 ev_view_drag_data_get (GtkWidget        *widget,
1661                        GdkDragContext   *context,
1662                        GtkSelectionData *selection_data,
1663                        guint             info,
1664                        guint             time)
1665 {
1666         EvView *view = EV_VIEW (widget);
1667
1668         if (view->selection_info.selections &&
1669             ev_document_can_get_text (view->document)) {
1670                 gchar *text;
1671
1672                 text = get_selected_text (view);
1673
1674                 gtk_selection_data_set_text (selection_data, text, strlen (text));
1675
1676                 g_free (text);
1677         }
1678 }
1679
1680 static gboolean
1681 selection_update_idle_cb (EvView *view)
1682 {
1683         GdkPoint point;
1684         point.x = view->motion_x;
1685         point.y = view->motion_y;
1686         compute_selections (view, &view->selection_info.start, &point);
1687
1688         view->selection_update_id = 0;
1689         return FALSE;
1690 }
1691
1692 static gboolean
1693 ev_view_motion_notify_event (GtkWidget      *widget,
1694                              GdkEventMotion *event)
1695 {
1696         EvView *view = EV_VIEW (widget);
1697
1698         if (!view->document)
1699                 return FALSE;
1700
1701         if (view->selection_info.in_drag) {
1702                 if (gtk_drag_check_threshold (widget,
1703                                               view->selection_info.start.x,
1704                                               view->selection_info.start.y,
1705                                               event->x, event->y)) {
1706                         GdkDragContext *context;
1707                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
1708
1709                         gtk_target_list_add_text_targets (target_list, 0);
1710
1711                         context = gtk_drag_begin (widget, target_list,
1712                                                   GDK_ACTION_COPY,
1713                                                   1, (GdkEvent *)event);
1714
1715                         view->selection_info.in_drag = FALSE;
1716
1717                         gtk_target_list_unref (target_list);
1718
1719                         return TRUE;
1720                 }
1721         }
1722
1723         /* For the Evince 0.4.x release, we limit selection to un-rotated
1724          * documents only.
1725          */
1726         if (view->pressed_button == 1 && view->rotation == 0) {
1727                 view->selection_info.in_selection = TRUE;
1728                 view->motion_x = event->x + view->scroll_x;
1729                 view->motion_y = event->y + view->scroll_y;
1730
1731                 /* Queue an idle to handle the motion.  We do this because
1732                  * handling any selection events in the motion could be slower
1733                  * than new motion events reach us.  We always put it in the
1734                  * idle to make sure we catch up and don't visibly lag the
1735                  * mouse. */
1736                 if (! view->selection_update_id)
1737                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1738
1739                 return TRUE;
1740         } else if (view->pressed_button == 2) {
1741                 if (!view->drag_info.in_drag) {
1742                         gboolean start;
1743
1744                         start = gtk_drag_check_threshold (widget,
1745                                                           view->drag_info.start.x,
1746                                                           view->drag_info.start.y,
1747                                                           event->x_root,
1748                                                           event->y_root);
1749                         view->drag_info.in_drag = start;
1750                 }
1751
1752                 if (view->drag_info.in_drag) {
1753                         int dx, dy;
1754                         gdouble dhadj_value, dvadj_value;
1755
1756                         dx = event->x_root - view->drag_info.start.x;
1757                         dy = event->y_root - view->drag_info.start.y;
1758
1759                         dhadj_value = view->hadjustment->page_size *
1760                                       (gdouble)dx / widget->allocation.width;
1761                         dvadj_value = view->vadjustment->page_size *
1762                                       (gdouble)dy / widget->allocation.height;
1763
1764                         /* clamp scrolling to visible area */
1765                         gtk_adjustment_set_value (view->hadjustment,
1766                                                   MIN(view->drag_info.hadj - dhadj_value,
1767                                                       view->hadjustment->upper -
1768                                                       view->hadjustment->page_size));
1769                         gtk_adjustment_set_value (view->vadjustment,
1770                                                   MIN(view->drag_info.vadj - dvadj_value,
1771                                                       view->vadjustment->upper -
1772                                                       view->vadjustment->page_size));
1773
1774                         return TRUE;
1775                 }
1776         /* For the Evince 0.4.x release, we limit links to un-rotated documents
1777          * only.
1778          */
1779         } else if (view->pressed_button <= 0 &&
1780                    view->rotation == 0) {
1781                 handle_link_over_xy (view, event->x, event->y);
1782                 return TRUE;
1783         }
1784
1785         return FALSE;
1786 }
1787
1788 static gboolean
1789 ev_view_button_release_event (GtkWidget      *widget,
1790                               GdkEventButton *event)
1791 {
1792         EvView *view = EV_VIEW (widget);
1793         EvLink *link;
1794
1795         if (view->pressed_button == 2) {
1796                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1797         }
1798
1799         if (view->document) {
1800                 link = get_link_at_location (view, event->x + view->scroll_x,
1801                                              event->y + view->scroll_y);
1802         } else {
1803                 link = NULL;
1804         }
1805
1806         view->pressed_button = -1;
1807         view->drag_info.in_drag = FALSE;
1808
1809         if (view->selection_info.selections) {
1810                 ev_view_update_primary_selection (view);
1811
1812                 if (view->selection_info.in_drag) {
1813                         clear_selection (view);
1814                         gtk_widget_queue_draw (widget);
1815                 }
1816
1817                 view->selection_info.in_drag = FALSE;
1818         } else if (link) {
1819                 ev_view_goto_link (view, link);
1820         } else if (view->presentation) {
1821                 switch (event->button) {
1822                 case 1:
1823                         ev_view_next_page (view);
1824                         return TRUE;
1825                 case 3:
1826                         ev_view_previous_page (view);
1827                         return TRUE;
1828                 }
1829         }
1830
1831         return FALSE;
1832 }
1833
1834 static gint
1835 ev_view_focus_in (GtkWidget     *widget,
1836                   GdkEventFocus *event)
1837 {
1838         if (EV_VIEW (widget)->pixbuf_cache)
1839                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1840         gtk_widget_queue_draw (widget);
1841
1842         return FALSE;
1843 }
1844
1845 static gint
1846 ev_view_focus_out (GtkWidget     *widget,
1847                      GdkEventFocus *event)
1848 {
1849         if (EV_VIEW (widget)->pixbuf_cache)
1850                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1851         gtk_widget_queue_draw (widget);
1852
1853         return FALSE;
1854 }
1855
1856 static gboolean
1857 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1858 {
1859         EvView *view = EV_VIEW (widget);
1860
1861         ev_view_set_status (view, NULL);
1862
1863         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1864             view->cursor == EV_VIEW_CURSOR_IBEAM)
1865                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1866
1867         if (view->link_tooltip) {
1868                 view->hovered_link = NULL;
1869                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1870         }
1871
1872         return FALSE;
1873 }
1874
1875 static gboolean
1876 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1877 {
1878         EvView *view = EV_VIEW (widget);
1879
1880         handle_link_over_xy (view, event->x, event->y);
1881
1882         return FALSE;
1883 }
1884
1885 static void
1886 ev_view_style_set (GtkWidget *widget,
1887                    GtkStyle  *old_style)
1888 {
1889         if (EV_VIEW (widget)->pixbuf_cache)
1890                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1891
1892         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
1893 }
1894
1895 /*** Drawing ***/
1896
1897 static guint32
1898 ev_gdk_color_to_rgb (const GdkColor *color)
1899 {
1900   guint32 result;
1901   result = (0xff0000 | (color->red & 0xff00));
1902   result <<= 8;
1903   result |= ((color->green & 0xff00) | (color->blue >> 8));
1904   return result;
1905 }
1906
1907 static void
1908 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1909                  const GdkRectangle *rect, guchar alpha)
1910 {
1911         GdkGC *gc;
1912         GdkPixbuf *pixbuf;
1913         GdkColor *fill_color_gdk;
1914         guint fill_color;
1915
1916         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1917         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1918
1919         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1920                                  rect->width, rect->height);
1921         gdk_pixbuf_fill (pixbuf, fill_color);
1922
1923         gdk_draw_pixbuf (window, NULL, pixbuf,
1924                          0, 0,
1925                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1926                          rect->width, rect->height,
1927                          GDK_RGB_DITHER_NONE,
1928                          0, 0);
1929
1930         g_object_unref (pixbuf);
1931
1932         gc = gdk_gc_new (window);
1933         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1934         gdk_draw_rectangle (window, gc, FALSE,
1935                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1936                             rect->width - 1,
1937                             rect->height - 1);
1938         g_object_unref (gc);
1939
1940         gdk_color_free (fill_color_gdk);
1941 }
1942
1943
1944 static void
1945 highlight_find_results (EvView *view, int page)
1946 {
1947         EvDocumentFind *find;
1948         int i, results = 0;
1949
1950         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1951
1952         find = EV_DOCUMENT_FIND (view->document);
1953
1954         results = ev_document_find_get_n_results (find, page);
1955
1956         for (i = 0; i < results; i++) {
1957                 EvRectangle rectangle;
1958                 GdkRectangle view_rectangle;
1959                 guchar alpha;
1960
1961                 if (i == view->find_result && page == view->find_page) {
1962                         alpha = 0x90;
1963                 } else {
1964                         alpha = 0x20;
1965                 }
1966
1967                 ev_document_find_get_result (find, page, i, &rectangle);
1968                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1969                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1970                                  &view_rectangle, alpha);
1971         }
1972 }
1973
1974 static void
1975 draw_loading_text (EvView       *view,
1976                    GdkRectangle *page_area,
1977                    GdkRectangle *expose_area)
1978 {
1979         PangoLayout *layout;
1980         PangoFontDescription *font_desc;
1981         PangoRectangle logical_rect;
1982         double real_scale;
1983         int target_width;
1984
1985         const char *loading_text = _("Loading...");
1986
1987         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
1988
1989         font_desc = pango_font_description_new ();
1990
1991
1992         /* We set the font to be 10 points, get the size, and scale appropriately */
1993         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
1994         pango_layout_set_font_description (layout, font_desc);
1995         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
1996
1997         /* Make sure we fit the middle of the page */
1998         target_width = MAX (page_area->width / 2, 1);
1999         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
2000         pango_font_description_set_size (font_desc, (int)real_scale);
2001         pango_layout_set_font_description (layout, font_desc);
2002         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2003
2004         gtk_paint_layout (GTK_WIDGET (view)->style,
2005                           GTK_WIDGET (view)->window,
2006                           GTK_WIDGET_STATE (view),
2007                           FALSE,
2008                           page_area,
2009                           GTK_WIDGET (view),
2010                           NULL,
2011                           page_area->x + (target_width/2),
2012                           page_area->y + (page_area->height - logical_rect.height) / 2,
2013                           layout);
2014
2015         pango_font_description_free (font_desc);
2016         g_object_unref (layout);
2017 }
2018
2019 static void
2020 draw_one_page (EvView          *view,
2021                gint             page,
2022                GdkRectangle    *page_area,
2023                GtkBorder       *border,
2024                GdkRectangle    *expose_area)
2025 {
2026         gint width, height;
2027         GdkPixbuf *current_pixbuf;
2028         GdkRectangle overlap;
2029         GdkRectangle real_page_area;
2030         EvViewSelection *selection;
2031
2032         g_assert (view->document);
2033         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2034                 return;
2035
2036         selection = find_selection_for_page (view, page);
2037         ev_page_cache_get_size (view->page_cache,
2038                                 page, view->rotation,
2039                                 view->scale,
2040                                 &width, &height);
2041         /* Render the document itself */
2042         real_page_area = *page_area;
2043
2044         real_page_area.x += border->left;
2045         real_page_area.y += border->top;
2046         real_page_area.width -= (border->left + border->right);
2047         real_page_area.height -= (border->top + border->bottom);
2048
2049         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2050                                          GTK_WIDGET (view),
2051                                          page_area, border);
2052
2053         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2054                 GdkPixbuf *selection_pixbuf = NULL;
2055                 GdkPixbuf *scaled_image;
2056                 GdkPixbuf *scaled_selection;
2057
2058                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2059
2060                 /* Get the selection pixbuf iff we have something to draw */
2061                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2062                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2063                                                                                  page,
2064                                                                                  view->scale,
2065                                                                                  NULL);
2066
2067                 if (current_pixbuf == NULL)
2068                         scaled_image = NULL;
2069                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2070                          height == gdk_pixbuf_get_height (current_pixbuf))
2071                         scaled_image = g_object_ref (current_pixbuf);
2072                 else
2073                         /* FIXME: We don't want to scale the whole area, just the right
2074                          * area of it */
2075                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2076                                                                 width, height,
2077                                                                 GDK_INTERP_NEAREST);
2078
2079                 if (selection_pixbuf == NULL)
2080                         scaled_selection = NULL;
2081                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2082                          height == gdk_pixbuf_get_height (selection_pixbuf))
2083                         scaled_selection = g_object_ref (selection_pixbuf);
2084                 else
2085                         /* FIXME: We don't want to scale the whole area, just the right
2086                          * area of it */
2087                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2088                                                                     width, height,
2089                                                                     GDK_INTERP_NEAREST);
2090
2091                 if (scaled_image) {
2092                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2093                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2094                                          scaled_image,
2095                                          overlap.x - real_page_area.x,
2096                                          overlap.y - real_page_area.y,
2097                                          overlap.x, overlap.y,
2098                                          overlap.width, overlap.height,
2099                                          GDK_RGB_DITHER_NORMAL,
2100                                          0, 0);
2101                         g_object_unref (scaled_image);
2102                 } else {
2103                         draw_loading_text (view,
2104                                            &real_page_area,
2105                                            expose_area);
2106                 }
2107
2108                 if (scaled_selection) {
2109                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2110                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2111                                          scaled_selection,
2112                                          overlap.x - real_page_area.x,
2113                                          overlap.y - real_page_area.y,
2114                                          overlap.x, overlap.y,
2115                                          overlap.width, overlap.height,
2116                                          GDK_RGB_DITHER_NORMAL,
2117                                          0, 0);
2118                         g_object_unref (scaled_selection);
2119                 }
2120         }
2121 }
2122
2123 /*** GObject functions ***/
2124
2125 static void
2126 ev_view_finalize (GObject *object)
2127 {
2128         EvView *view = EV_VIEW (object);
2129
2130         LOG ("Finalize");
2131
2132         g_free (view->status);
2133         g_free (view->find_status);
2134
2135         clear_selection (view);
2136
2137         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2138 }
2139
2140 static void
2141 ev_view_destroy (GtkObject *object)
2142 {
2143         EvView *view = EV_VIEW (object);
2144
2145         if (view->document) {
2146                 g_object_unref (view->document);
2147                 view->document = NULL;
2148         }
2149
2150         if (view->pixbuf_cache) {
2151                 g_object_unref (view->pixbuf_cache);
2152                 view->pixbuf_cache = NULL;
2153         }
2154
2155         if (view->link_tooltip) {
2156                 gtk_widget_destroy (view->link_tooltip);
2157         }
2158
2159         ev_view_set_scroll_adjustments (view, NULL, NULL);
2160
2161         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2162 }
2163
2164 static void
2165 ev_view_set_property (GObject      *object,
2166                       guint         prop_id,
2167                       const GValue *value,
2168                       GParamSpec   *pspec)
2169 {
2170         EvView *view = EV_VIEW (object);
2171
2172         switch (prop_id)
2173         {
2174         case PROP_CONTINUOUS:
2175                 ev_view_set_continuous (view, g_value_get_boolean (value));
2176                 break;
2177         case PROP_DUAL_PAGE:
2178                 ev_view_set_dual_page (view, g_value_get_boolean (value));
2179                 break;
2180         case PROP_FULLSCREEN:
2181                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
2182                 break;
2183         case PROP_PRESENTATION:
2184                 ev_view_set_presentation (view, g_value_get_boolean (value));
2185                 break;
2186         case PROP_SIZING_MODE:
2187                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
2188                 break;
2189         case PROP_ZOOM:
2190                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2191                 break;
2192         case PROP_ROTATION:
2193                 ev_view_set_rotation (view, g_value_get_int (value));
2194                 break;
2195         default:
2196                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2197         }
2198 }
2199
2200 static AtkObject *
2201 ev_view_get_accessible (GtkWidget *widget)
2202 {
2203         static gboolean first_time = TRUE;
2204
2205         if (first_time) {
2206                 AtkObjectFactory *factory;
2207                 AtkRegistry *registry;
2208                 GType derived_type;
2209                 GType derived_atk_type;
2210
2211                 /*
2212                  * Figure out whether accessibility is enabled by looking at the
2213                  * type of the accessible object which would be created for
2214                  * the parent type of EvView.
2215                  */
2216                 derived_type = g_type_parent (EV_TYPE_VIEW);
2217
2218                 registry = atk_get_default_registry ();
2219                 factory = atk_registry_get_factory (registry,
2220                                                     derived_type);
2221                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
2222                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
2223                         atk_registry_set_factory_type (registry,
2224                                                        EV_TYPE_VIEW,
2225                                                        ev_view_accessible_factory_get_type ());
2226                 first_time = FALSE;
2227         }
2228         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
2229 }
2230
2231 static void
2232 ev_view_get_property (GObject *object,
2233                       guint prop_id,
2234                       GValue *value,
2235                       GParamSpec *pspec)
2236 {
2237         EvView *view = EV_VIEW (object);
2238
2239         switch (prop_id)
2240         {
2241         case PROP_STATUS:
2242                 g_value_set_string (value, view->status);
2243                 break;
2244         case PROP_FIND_STATUS:
2245                 g_value_set_string (value, view->status);
2246                 break;
2247         case PROP_CONTINUOUS:
2248                 g_value_set_boolean (value, view->continuous);
2249                 break;
2250         case PROP_DUAL_PAGE:
2251                 g_value_set_boolean (value, view->dual_page);
2252                 break;
2253         case PROP_FULLSCREEN:
2254                 g_value_set_boolean (value, view->fullscreen);
2255                 break;
2256         case PROP_PRESENTATION:
2257                 g_value_set_boolean (value, view->presentation);
2258                 break;
2259         case PROP_SIZING_MODE:
2260                 g_value_set_enum (value, view->sizing_mode);
2261                 break;
2262         case PROP_ZOOM:
2263                 g_value_set_double (value, view->scale);
2264                 break;
2265         case PROP_ROTATION:
2266                 g_value_set_int (value, view->rotation);
2267                 break;
2268         case PROP_HAS_SELECTION:
2269                 g_value_set_boolean (value,
2270                                      view->selection_info.selections != NULL);
2271                 break;
2272         default:
2273                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2274         }
2275 }
2276
2277 static void
2278 ev_view_class_init (EvViewClass *class)
2279 {
2280         GObjectClass *object_class = G_OBJECT_CLASS (class);
2281         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2282         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2283         GtkBindingSet *binding_set;
2284
2285         object_class->finalize = ev_view_finalize;
2286         object_class->set_property = ev_view_set_property;
2287         object_class->get_property = ev_view_get_property;
2288
2289         widget_class->expose_event = ev_view_expose_event;
2290         widget_class->button_press_event = ev_view_button_press_event;
2291         widget_class->motion_notify_event = ev_view_motion_notify_event;
2292         widget_class->button_release_event = ev_view_button_release_event;
2293         widget_class->focus_in_event = ev_view_focus_in;
2294         widget_class->focus_out_event = ev_view_focus_out;
2295         widget_class->get_accessible = ev_view_get_accessible;
2296         widget_class->size_request = ev_view_size_request;
2297         widget_class->size_allocate = ev_view_size_allocate;
2298         widget_class->realize = ev_view_realize;
2299         widget_class->scroll_event = ev_view_scroll_event;
2300         widget_class->enter_notify_event = ev_view_enter_notify_event;
2301         widget_class->leave_notify_event = ev_view_leave_notify_event;
2302         widget_class->style_set = ev_view_style_set;
2303         widget_class->drag_data_get = ev_view_drag_data_get;
2304         gtk_object_class->destroy = ev_view_destroy;
2305
2306         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2307         class->binding_activated = ev_view_binding_activated;
2308
2309         widget_class->set_scroll_adjustments_signal =
2310             g_signal_new ("set-scroll-adjustments",
2311                           G_OBJECT_CLASS_TYPE (object_class),
2312                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2313                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2314                           NULL, NULL,
2315                           ev_marshal_VOID__OBJECT_OBJECT,
2316                           G_TYPE_NONE, 2,
2317                           GTK_TYPE_ADJUSTMENT,
2318                           GTK_TYPE_ADJUSTMENT);
2319
2320         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2321                          G_TYPE_FROM_CLASS (object_class),
2322                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2323                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2324                          NULL, NULL,
2325                          ev_marshal_VOID__ENUM_BOOLEAN,
2326                          G_TYPE_NONE, 2,
2327                          GTK_TYPE_SCROLL_TYPE,
2328                          G_TYPE_BOOLEAN);
2329
2330         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2331                          G_TYPE_FROM_CLASS (object_class),
2332                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2333                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2334                          NULL, NULL,
2335                          ev_marshal_VOID__VOID,
2336                          G_TYPE_NONE, 0, G_TYPE_NONE);
2337         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2338                          G_TYPE_FROM_CLASS (object_class),
2339                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2340                          G_STRUCT_OFFSET (EvViewClass, external_link),
2341                          NULL, NULL,
2342                          g_cclosure_marshal_VOID__OBJECT,
2343                          G_TYPE_NONE, 1,
2344                          G_TYPE_OBJECT);
2345
2346         g_object_class_install_property (object_class,
2347                                          PROP_STATUS,
2348                                          g_param_spec_string ("status",
2349                                                               "Status Message",
2350                                                               "The status message",
2351                                                               NULL,
2352                                                               G_PARAM_READABLE));
2353
2354         g_object_class_install_property (object_class,
2355                                          PROP_FIND_STATUS,
2356                                          g_param_spec_string ("find-status",
2357                                                               "Find Status Message",
2358                                                               "The find status message",
2359                                                               NULL,
2360                                                               G_PARAM_READABLE));
2361
2362         g_object_class_install_property (object_class,
2363                                          PROP_CONTINUOUS,
2364                                          g_param_spec_boolean ("continuous",
2365                                                                "Continuous",
2366                                                                "Continuous scrolling mode",
2367                                                                TRUE,
2368                                                                G_PARAM_READWRITE));
2369
2370         g_object_class_install_property (object_class,
2371                                          PROP_DUAL_PAGE,
2372                                          g_param_spec_boolean ("dual-page",
2373                                                                "Dual Page",
2374                                                                "Two pages visible at once",
2375                                                                FALSE,
2376                                                                G_PARAM_READWRITE));
2377         g_object_class_install_property (object_class,
2378                                          PROP_FULLSCREEN,
2379                                          g_param_spec_boolean ("fullscreen",
2380                                                                "Full Screen",
2381                                                                "Draw page in a fullscreen fashion",
2382                                                                FALSE,
2383                                                                G_PARAM_READWRITE));
2384         g_object_class_install_property (object_class,
2385                                          PROP_PRESENTATION,
2386                                          g_param_spec_boolean ("presentation",
2387                                                                "Presentation",
2388                                                                "Draw page in presentation mode",
2389                                                                TRUE,
2390                                                                G_PARAM_READWRITE));
2391
2392         g_object_class_install_property (object_class,
2393                                          PROP_SIZING_MODE,
2394                                          g_param_spec_enum ("sizing-mode",
2395                                                             "Sizing Mode",
2396                                                             "Sizing Mode",
2397                                                             EV_TYPE_SIZING_MODE,
2398                                                             EV_SIZING_FIT_WIDTH,
2399                                                             G_PARAM_READWRITE));
2400
2401         g_object_class_install_property (object_class,
2402                                          PROP_ZOOM,
2403                                          g_param_spec_double ("zoom",
2404                                                               "Zoom factor",
2405                                                                "Zoom factor",
2406                                                                MIN_SCALE,
2407                                                                MAX_SCALE,
2408                                                                1.0,
2409                                                                G_PARAM_READWRITE));
2410         g_object_class_install_property (object_class,
2411                                          PROP_ROTATION,
2412                                          g_param_spec_double ("rotation",
2413                                                               "Rotation",
2414                                                                "Rotation",
2415                                                                0,
2416                                                                360,
2417                                                                0,
2418                                                                G_PARAM_READWRITE));
2419         g_object_class_install_property (object_class,
2420                                          PROP_HAS_SELECTION,
2421                                          g_param_spec_boolean ("has-selection",
2422                                                                "Has selection",
2423                                                                "The view has selections",
2424                                                                FALSE,
2425                                                                G_PARAM_READABLE));
2426
2427         binding_set = gtk_binding_set_by_class (class);
2428
2429         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
2430         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
2431         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
2432         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
2433 }
2434
2435 static void
2436 ev_view_init (EvView *view)
2437 {
2438         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2439
2440         view->spacing = 5;
2441         view->scale = 1.0;
2442         view->current_page = 0;
2443         view->pressed_button = -1;
2444         view->cursor = EV_VIEW_CURSOR_NORMAL;
2445         view->drag_info.in_drag = FALSE;
2446         view->selection_info.selections = NULL;
2447         view->selection_info.in_selection = FALSE;
2448         view->selection_info.in_drag = FALSE;
2449         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2450         view->continuous = TRUE;
2451         view->dual_page = FALSE;
2452         view->presentation = FALSE;
2453         view->fullscreen = FALSE;
2454         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2455         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2456 }
2457
2458 /*** Callbacks ***/
2459
2460 static void
2461 find_changed_cb (EvDocument *document, int page, EvView *view)
2462 {
2463         jump_to_find_page (view, EV_VIEW_FIND_NEXT);
2464         jump_to_find_result (view);
2465         update_find_status_message (view);
2466
2467         if (view->current_page == page)
2468                 gtk_widget_queue_draw (GTK_WIDGET (view));
2469 }
2470
2471 static void
2472 job_finished_cb (EvPixbufCache *pixbuf_cache,
2473                  EvView        *view)
2474 {
2475         gtk_widget_queue_draw (GTK_WIDGET (view));
2476 }
2477
2478 static void
2479 page_changed_cb (EvPageCache *page_cache,
2480                  int          new_page,
2481                  EvView      *view)
2482 {
2483         if (view->current_page != new_page) {
2484
2485                 view->current_page = new_page;
2486                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2487                 gtk_widget_queue_resize (GTK_WIDGET (view));
2488
2489                 if (EV_IS_DOCUMENT_FIND (view->document)) {
2490                         view->find_page = new_page;
2491                         view->find_result = 0;
2492                         update_find_status_message (view);
2493                 }
2494         }
2495 }
2496
2497 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2498                                          EvView *view)
2499 {
2500         int dx = 0, dy = 0;
2501
2502         if (! GTK_WIDGET_REALIZED (view))
2503                 return;
2504
2505         if (view->hadjustment) {
2506                 dx = view->scroll_x - (int) view->hadjustment->value;
2507                 view->scroll_x = (int) view->hadjustment->value;
2508         } else {
2509                 view->scroll_x = 0;
2510         }
2511
2512         if (view->vadjustment) {
2513                 dy = view->scroll_y - (int) view->vadjustment->value;
2514                 view->scroll_y = (int) view->vadjustment->value;
2515         } else {
2516                 view->scroll_y = 0;
2517         }
2518
2519
2520         if (view->pending_resize)
2521                 gtk_widget_queue_draw (GTK_WIDGET (view));
2522         else
2523                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2524
2525
2526         if (view->document)
2527                 view_update_range_and_current_page (view);
2528 }
2529
2530 GtkWidget*
2531 ev_view_new (void)
2532 {
2533         GtkWidget *view;
2534
2535         view = g_object_new (EV_TYPE_VIEW, NULL);
2536
2537         return view;
2538 }
2539
2540 static void
2541 setup_caches (EvView *view)
2542 {
2543         view->page_cache = ev_page_cache_get (view->document);
2544         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2545         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2546         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2547 }
2548
2549 static void
2550 clear_caches (EvView *view)
2551 {
2552         if (view->pixbuf_cache) {
2553                 g_object_unref (view->pixbuf_cache);
2554                 view->pixbuf_cache = NULL;
2555         }
2556
2557         if (view->page_cache) {
2558                 view->page_cache = NULL;
2559         }
2560 }
2561
2562 void
2563 ev_view_set_document (EvView     *view,
2564                       EvDocument *document)
2565 {
2566         g_return_if_fail (EV_IS_VIEW (view));
2567
2568         if (document != view->document) {
2569                 clear_caches (view);
2570
2571                 if (view->document) {
2572                         g_signal_handlers_disconnect_by_func (view->document,
2573                                                               find_changed_cb,
2574                                                               view);
2575                         g_object_unref (view->document);
2576                         view->page_cache = NULL;
2577
2578                 }
2579
2580                 view->document = document;
2581                 view->find_page = 0;
2582                 view->find_result = 0;
2583
2584                 if (view->document) {
2585                         g_object_ref (view->document);
2586                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2587                                 g_signal_connect (view->document,
2588                                                   "find_changed",
2589                                                   G_CALLBACK (find_changed_cb),
2590                                                   view);
2591                         }
2592
2593                         setup_caches (view);
2594                 }
2595
2596                 gtk_widget_queue_resize (GTK_WIDGET (view));
2597         }
2598 }
2599
2600 /*** Zoom and sizing mode ***/
2601
2602 #define EPSILON 0.0000001
2603 void
2604 ev_view_set_zoom (EvView   *view,
2605                   double    factor,
2606                   gboolean  relative)
2607 {
2608         double scale;
2609
2610         if (relative)
2611                 scale = view->scale * factor;
2612         else
2613                 scale = factor;
2614
2615         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2616
2617         if (ABS (view->scale - scale) < EPSILON)
2618                 return;
2619
2620         view->scale = scale;
2621         view->pending_resize = TRUE;
2622
2623         gtk_widget_queue_resize (GTK_WIDGET (view));
2624
2625         g_object_notify (G_OBJECT (view), "zoom");
2626 }
2627
2628 double
2629 ev_view_get_zoom (EvView *view)
2630 {
2631         return view->scale;
2632 }
2633
2634 gboolean
2635 ev_view_get_continuous (EvView *view)
2636 {
2637         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2638
2639         return view->continuous;
2640 }
2641
2642 void
2643 ev_view_set_continuous (EvView   *view,
2644                         gboolean  continuous)
2645 {
2646         g_return_if_fail (EV_IS_VIEW (view));
2647
2648         continuous = continuous != FALSE;
2649
2650         if (view->continuous != continuous) {
2651                 view->continuous = continuous;
2652                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2653                 gtk_widget_queue_resize (GTK_WIDGET (view));
2654         }
2655
2656         g_object_notify (G_OBJECT (view), "continuous");
2657 }
2658
2659 gboolean
2660 ev_view_get_dual_page (EvView *view)
2661 {
2662         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2663
2664         return view->dual_page;
2665 }
2666
2667 void
2668 ev_view_set_dual_page (EvView   *view,
2669                        gboolean  dual_page)
2670 {
2671         g_return_if_fail (EV_IS_VIEW (view));
2672
2673         dual_page = dual_page != FALSE;
2674
2675         if (view->dual_page == dual_page)
2676                 return;
2677
2678         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2679         view->dual_page = dual_page;
2680         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2681          * preload_cache_size to be 2 if dual_page is set.
2682          */
2683         gtk_widget_queue_resize (GTK_WIDGET (view));
2684
2685         g_object_notify (G_OBJECT (view), "dual-page");
2686 }
2687
2688 void
2689 ev_view_set_fullscreen (EvView   *view,
2690                          gboolean  fullscreen)
2691 {
2692         g_return_if_fail (EV_IS_VIEW (view));
2693
2694         fullscreen = fullscreen != FALSE;
2695
2696         if (view->fullscreen == fullscreen)
2697                 return;
2698
2699         view->fullscreen = fullscreen;
2700         gtk_widget_queue_resize (GTK_WIDGET (view));
2701
2702         g_object_notify (G_OBJECT (view), "fullscreen");
2703 }
2704
2705 gboolean
2706 ev_view_get_fullscreen (EvView *view)
2707 {
2708         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2709
2710         return view->fullscreen;
2711 }
2712
2713 void
2714 ev_view_set_presentation (EvView   *view,
2715                           gboolean  presentation)
2716 {
2717         g_return_if_fail (EV_IS_VIEW (view));
2718
2719         presentation = presentation != FALSE;
2720
2721         if (view->presentation == presentation)
2722                 return;
2723
2724         view->presentation = presentation;
2725         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2726         gtk_widget_queue_resize (GTK_WIDGET (view));
2727
2728         if (GTK_WIDGET_REALIZED (view)) {
2729                 if (view->presentation)
2730                         gdk_window_set_background (GTK_WIDGET(view)->window,
2731                                                    &GTK_WIDGET (view)->style->black);
2732                 else
2733                         gdk_window_set_background (GTK_WIDGET(view)->window,
2734                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2735         }
2736
2737
2738         g_object_notify (G_OBJECT (view), "presentation");
2739 }
2740
2741 gboolean
2742 ev_view_get_presentation (EvView *view)
2743 {
2744         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2745
2746         return view->presentation;
2747 }
2748
2749 void
2750 ev_view_set_sizing_mode (EvView       *view,
2751                          EvSizingMode  sizing_mode)
2752 {
2753         g_return_if_fail (EV_IS_VIEW (view));
2754
2755         if (view->sizing_mode == sizing_mode)
2756                 return;
2757
2758         view->sizing_mode = sizing_mode;
2759         gtk_widget_queue_resize (GTK_WIDGET (view));
2760
2761         g_object_notify (G_OBJECT (view), "sizing-mode");
2762 }
2763
2764 EvSizingMode
2765 ev_view_get_sizing_mode (EvView *view)
2766 {
2767         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2768
2769         return view->sizing_mode;
2770 }
2771
2772 gboolean
2773 ev_view_can_zoom_in (EvView *view)
2774 {
2775         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2776 }
2777
2778 gboolean
2779 ev_view_can_zoom_out (EvView *view)
2780 {
2781         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2782 }
2783
2784 void
2785 ev_view_zoom_in (EvView *view)
2786 {
2787         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2788
2789         view->pending_scroll = SCROLL_TO_CENTER;
2790         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2791 }
2792
2793 void
2794 ev_view_zoom_out (EvView *view)
2795 {
2796         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2797
2798         view->pending_scroll = SCROLL_TO_CENTER;
2799         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2800 }
2801
2802 void
2803 ev_view_rotate_right (EvView *view)
2804 {
2805         int rotation = view->rotation + 90;
2806
2807         if (rotation >= 360) {
2808                 rotation -= 360;
2809         }
2810
2811         ev_view_set_rotation (view, rotation);
2812 }
2813
2814 void
2815 ev_view_rotate_left (EvView *view)
2816 {
2817         int rotation = view->rotation - 90;
2818
2819         if (rotation < 0) {
2820                 rotation += 360;
2821         }
2822
2823         ev_view_set_rotation (view, rotation);
2824 }
2825
2826 void
2827 ev_view_set_rotation (EvView *view, int rotation)
2828 {
2829         view->rotation = rotation;
2830
2831         if (view->pixbuf_cache) {
2832                 ev_pixbuf_cache_clear (view->pixbuf_cache);
2833                 gtk_widget_queue_resize (GTK_WIDGET (view));
2834         }
2835
2836         if (rotation != 0)
2837                 clear_selection (view);
2838
2839         g_object_notify (G_OBJECT (view), "rotation");
2840 }
2841
2842 int
2843 ev_view_get_rotation (EvView *view)
2844 {
2845         return view->rotation;
2846 }
2847
2848 static double
2849 zoom_for_size_fit_width (int doc_width,
2850                          int doc_height,
2851                          int target_width,
2852                          int target_height,
2853                          int vsb_width)
2854 {
2855         double scale;
2856
2857         scale = (double)target_width / doc_width;
2858
2859         if (doc_height * scale > target_height)
2860                 scale = (double) (target_width - vsb_width) / doc_width;
2861
2862         return scale;
2863 }
2864
2865 static double
2866 zoom_for_size_fit_height (int doc_width,
2867                           int doc_height,
2868                           int target_width,
2869                           int target_height,
2870                           int vsb_height)
2871 {
2872         double scale;
2873
2874         scale = (double)target_height / doc_height;
2875
2876         if (doc_width * scale > target_width)
2877                 scale = (double) (target_height - vsb_height) / doc_height;
2878
2879         return scale;
2880 }
2881
2882 static double
2883 zoom_for_size_best_fit (int doc_width,
2884                         int doc_height,
2885                         int target_width,
2886                         int target_height,
2887                         int vsb_width,
2888                         int hsb_width)
2889 {
2890         double w_scale;
2891         double h_scale;
2892
2893         w_scale = (double)target_width / doc_width;
2894         h_scale = (double)target_height / doc_height;
2895
2896         if (doc_height * w_scale > target_height)
2897                 w_scale = (double) (target_width - vsb_width) / doc_width;
2898         if (doc_width * h_scale > target_width)
2899                 h_scale = (double) (target_height - hsb_width) / doc_height;
2900
2901         return MIN (w_scale, h_scale);
2902 }
2903
2904
2905 static void
2906 ev_view_zoom_for_size_presentation (EvView *view,
2907                                     int     width,
2908                                     int     height)
2909 {
2910         int doc_width, doc_height;
2911         gdouble scale;
2912
2913         ev_page_cache_get_size (view->page_cache,
2914                                 view->current_page,
2915                                 view->rotation,
2916                                 1.0,
2917                                 &doc_width,
2918                                 &doc_height);
2919         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2920         ev_view_set_zoom (view, scale, FALSE);
2921 }
2922
2923 static void
2924 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2925                            int     width,
2926                            int     height,
2927                            int     vsb_width,
2928                            int     hsb_height)
2929 {
2930         int doc_width, doc_height;
2931         GtkBorder border;
2932         gdouble scale;
2933
2934         ev_page_cache_get_max_width (view->page_cache,
2935                                      view->rotation,
2936                                      1.0,
2937                                      &doc_width);
2938         ev_page_cache_get_max_height (view->page_cache,
2939                                       view->rotation,
2940                                       1.0,
2941                                       &doc_height);
2942         compute_border (view, doc_width, doc_height, &border);
2943
2944         doc_width = doc_width * 2;
2945         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2946         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2947
2948         /* FIXME: We really need to calculate the overall height here, not the
2949          * page height.  We assume there's always a vertical scrollbar for
2950          * now.  We need to fix this. */
2951         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2952                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2953         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2954                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2955         else
2956                 g_assert_not_reached ();
2957
2958         ev_view_set_zoom (view, scale, FALSE);
2959 }
2960
2961 static void
2962 ev_view_zoom_for_size_continuous (EvView *view,
2963                                   int     width,
2964                                   int     height,
2965                                   int     vsb_width,
2966                                   int     hsb_height)
2967 {
2968         int doc_width, doc_height;
2969         GtkBorder border;
2970         gdouble scale;
2971
2972         ev_page_cache_get_max_width (view->page_cache,
2973                                      view->rotation,
2974                                      1.0,
2975                                      &doc_width);
2976         ev_page_cache_get_max_height (view->page_cache,
2977                                       view->rotation,
2978                                       1.0,
2979                                       &doc_height);
2980         compute_border (view, doc_width, doc_height, &border);
2981
2982         width -= (border.left + border.right + 2 * view->spacing);
2983         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2984
2985         /* FIXME: We really need to calculate the overall height here, not the
2986          * page height.  We assume there's always a vertical scrollbar for
2987          * now.  We need to fix this. */
2988         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2989                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2990         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2991                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2992         else
2993                 g_assert_not_reached ();
2994
2995         ev_view_set_zoom (view, scale, FALSE);
2996 }
2997
2998 static void
2999 ev_view_zoom_for_size_dual_page (EvView *view,
3000                                  int     width,
3001                                  int     height,
3002                                  int     vsb_width,
3003                                  int     hsb_height)
3004 {
3005         GtkBorder border;
3006         gint doc_width, doc_height;
3007         gdouble scale;
3008         gint other_page;
3009
3010         other_page = view->current_page ^ 1;
3011
3012         /* Find the largest of the two. */
3013         ev_page_cache_get_size (view->page_cache,
3014                                 view->current_page,
3015                                 view->rotation,
3016                                 1.0,
3017                                 &doc_width, &doc_height);
3018
3019         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
3020                 gint width_2, height_2;
3021                 ev_page_cache_get_size (view->page_cache,
3022                                         other_page,
3023                                         view->rotation,
3024                                         1.0,
3025                                         &width_2, &height_2);
3026                 if (width_2 > doc_width)
3027                         doc_width = width_2;
3028                 if (height_2 > doc_height)
3029                         doc_height = height_2;
3030         }
3031         compute_border (view, doc_width, doc_height, &border);
3032
3033         doc_width = doc_width * 2;
3034         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
3035         height -= (border.top + border.bottom + 2 * view->spacing);
3036
3037         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3038                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3039         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3040                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3041         else
3042                 g_assert_not_reached ();
3043
3044         ev_view_set_zoom (view, scale, FALSE);
3045 }
3046
3047 static void
3048 ev_view_zoom_for_size_single_page (EvView *view,
3049                                    int     width,
3050                                    int     height,
3051                                    int     vsb_width,
3052                                    int     hsb_height)
3053 {
3054         int doc_width, doc_height;
3055         GtkBorder border;
3056         gdouble scale;
3057
3058         ev_page_cache_get_size (view->page_cache,
3059                                 view->current_page,
3060                                 view->rotation,
3061                                 1.0,
3062                                 &doc_width,
3063                                 &doc_height);
3064         /* Get an approximate border */
3065         compute_border (view, width, height, &border);
3066
3067         width -= (border.left + border.right + 2 * view->spacing);
3068         height -= (border.top + border.bottom + 2 * view->spacing);
3069
3070         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3071                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3072         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3073                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3074         else
3075                 g_assert_not_reached ();
3076
3077         ev_view_set_zoom (view, scale, FALSE);
3078 }
3079
3080 void
3081 ev_view_set_zoom_for_size (EvView *view,
3082                            int     width,
3083                            int     height,
3084                            int     vsb_width,
3085                            int     hsb_height)
3086 {
3087         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3088                           view->sizing_mode == EV_SIZING_BEST_FIT);
3089         g_return_if_fail (width >= 0);
3090         g_return_if_fail (height >= 0);
3091
3092         if (view->document == NULL)
3093                 return;
3094
3095         if (view->presentation)
3096                 ev_view_zoom_for_size_presentation (view, width, height);
3097         else if (view->continuous && view->dual_page)
3098                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3099         else if (view->continuous)
3100                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3101         else if (view->dual_page)
3102                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3103         else
3104                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3105 }
3106
3107 /*** Status text messages ***/
3108
3109 const char *
3110 ev_view_get_status (EvView *view)
3111 {
3112         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3113
3114         return view->status;
3115 }
3116
3117 static void
3118 ev_view_set_status (EvView *view, const char *message)
3119 {
3120         g_return_if_fail (EV_IS_VIEW (view));
3121
3122         if (message != view->status) {
3123                 g_free (view->status);
3124                 view->status = g_strdup (message);
3125                 g_object_notify (G_OBJECT (view), "status");
3126         }
3127 }
3128
3129 static void
3130 update_find_status_message (EvView *view)
3131 {
3132         char *message;
3133
3134         if (view->current_page == view->find_page) {
3135                 int results;
3136
3137                 results = ev_document_find_get_n_results
3138                                 (EV_DOCUMENT_FIND (view->document),
3139                                  view->current_page);
3140                 /* TRANS: Sometimes this could be better translated as
3141                    "%d hit(s) on this page".  Therefore this string
3142                    contains plural cases. */
3143                 message = g_strdup_printf (ngettext ("%d found on this page",
3144                                                      "%d found on this page",
3145                                                      results),
3146                                            results);
3147         } else {
3148                 double percent;
3149
3150                 percent = ev_document_find_get_progress
3151                                 (EV_DOCUMENT_FIND (view->document));
3152                 if (percent >= (1.0 - 1e-10)) {
3153                         message = g_strdup (_("Not found"));
3154                 } else {
3155                         message = g_strdup_printf (_("%3d%% remaining to search"),
3156                                                    (int) ((1.0 - percent) * 100));
3157                 }
3158
3159         }
3160         ev_view_set_find_status (view, message);
3161         g_free (message);
3162 }
3163
3164 const char *
3165 ev_view_get_find_status (EvView *view)
3166 {
3167         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3168
3169         return view->find_status;
3170 }
3171
3172 static void
3173 ev_view_set_find_status (EvView *view, const char *message)
3174 {
3175         g_return_if_fail (EV_IS_VIEW (view));
3176
3177         g_free (view->find_status);
3178         view->find_status = g_strdup (message);
3179         g_object_notify (G_OBJECT (view), "find-status");
3180 }
3181
3182 /*** Find ***/
3183
3184 static void
3185 jump_to_find_result (EvView *view)
3186 {
3187         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3188         EvRectangle rect;
3189         GdkRectangle view_rect;
3190         int n_results;
3191         int page = view->find_page;
3192
3193         n_results = ev_document_find_get_n_results (find, page);
3194
3195         if (n_results > 0  && view->find_result < n_results) {
3196                 ev_document_find_get_result
3197                         (find, page, view->find_result, &rect);
3198
3199                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3200                 ensure_rectangle_is_visible (view, &view_rect);
3201         }
3202 }
3203
3204 static void
3205 jump_to_find_page (EvView *view, EvViewFindDirection direction)
3206 {
3207         int n_pages, i;
3208
3209         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3210
3211         for (i = 0; i < n_pages; i++) {
3212                 int has_results;
3213                 int page;
3214
3215                 if (direction == EV_VIEW_FIND_NEXT)
3216                         page = view->find_page + i;
3217                 else
3218                         page = view->find_page - i;
3219
3220
3221                 if (page >= n_pages) {
3222                         page = page - n_pages;
3223                 }
3224                 if (page < 0)
3225                         page = page + n_pages;
3226
3227                 has_results = ev_document_find_page_has_results
3228                                 (EV_DOCUMENT_FIND (view->document), page);
3229                 if (has_results == -1) {
3230                         view->find_page = page;
3231                         break;
3232                 } else if (has_results == 1) {
3233                         ev_page_cache_set_current_page (view->page_cache, page);
3234                         break;
3235                 }
3236         }
3237 }
3238
3239 gboolean
3240 ev_view_can_find_next (EvView *view)
3241 {
3242         if (EV_IS_DOCUMENT_FIND (view->document)) {
3243                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3244                 int i, n_pages;
3245
3246                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3247                 for (i = 0; i < n_pages; i++) {
3248                         if (ev_document_find_get_n_results (find, i) > 0) {
3249                                 return TRUE;
3250                         }
3251                 }
3252         }
3253
3254         return FALSE;
3255 }
3256
3257 void
3258 ev_view_find_next (EvView *view)
3259 {
3260         int n_results, n_pages;
3261         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3262
3263         n_results = ev_document_find_get_n_results (find, view->current_page);
3264
3265         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3266
3267         view->find_result++;
3268
3269         if (view->find_result >= n_results) {
3270
3271                 view->find_result = 0;
3272                 view->find_page++;
3273                 if (view->find_page >= n_pages) {
3274                         view->find_page = 0;
3275                 }
3276
3277                 jump_to_find_page (view, EV_VIEW_FIND_NEXT);
3278                 jump_to_find_result (view);
3279         } else {
3280                 jump_to_find_result (view);
3281                 gtk_widget_queue_draw (GTK_WIDGET (view));
3282         }
3283 }
3284
3285 void
3286 ev_view_find_previous (EvView *view)
3287 {
3288         int n_results, n_pages;
3289         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3290         EvPageCache *page_cache;
3291
3292         page_cache = ev_page_cache_get (view->document);
3293
3294         n_results = ev_document_find_get_n_results (find, view->current_page);
3295
3296         n_pages = ev_page_cache_get_n_pages (page_cache);
3297
3298         view->find_result--;
3299
3300         if (view->find_result < 0) {
3301
3302                 view->find_page--;
3303                 if (view->find_page < 0) {
3304                         view->find_page = n_pages - 1;
3305                 }
3306
3307                 jump_to_find_page (view, EV_VIEW_FIND_PREV);
3308                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3309                 jump_to_find_result (view);
3310         } else {
3311                 jump_to_find_result (view);
3312                 gtk_widget_queue_draw (GTK_WIDGET (view));
3313         }
3314 }
3315
3316 /*** Selections ***/
3317
3318 /* compute_new_selection_rect/text calculates the area currently selected by
3319  * view_rect.  each handles a different mode;
3320  */
3321 static GList *
3322 compute_new_selection_rect (EvView       *view,
3323                             GdkPoint     *start,
3324                             GdkPoint     *stop)
3325 {
3326         GdkRectangle view_rect;
3327         int n_pages, i;
3328         GList *list = NULL;
3329
3330         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3331
3332         view_rect.x = MIN (start->x, stop->x);
3333         view_rect.y = MIN (start->y, stop->y);
3334         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3335         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3336
3337         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3338
3339         for (i = 0; i < n_pages; i++) {
3340                 GdkRectangle page_area;
3341                 GtkBorder border;
3342
3343                 if (get_page_extents (view, i, &page_area, &border)) {
3344                         GdkRectangle overlap;
3345
3346                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3347                                 EvViewSelection *selection;
3348
3349                                 selection = g_new0 (EvViewSelection, 1);
3350                                 selection->page = i;
3351                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3352                                                        &(selection->rect));
3353
3354                                 list = g_list_append (list, selection);
3355                         }
3356                 }
3357         }
3358
3359         return list;
3360 }
3361
3362 static gboolean
3363 gdk_rectangle_point_in (GdkRectangle *rectangle,
3364                         GdkPoint     *point)
3365 {
3366         return rectangle->x <= point->x &&
3367                 rectangle->y <= point->y &&
3368                 point->x < rectangle->x + rectangle->width &&
3369                 point->y < rectangle->y + rectangle->height;
3370 }
3371
3372 static GList *
3373 compute_new_selection_text (EvView   *view,
3374                             GdkPoint *start,
3375                             GdkPoint *stop)
3376 {
3377         int n_pages, i, first, last;
3378         GList *list = NULL;
3379         EvViewSelection *selection;
3380         gint width, height;
3381         int start_page, end_page;
3382
3383         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3384
3385         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3386
3387         /* First figure out the range of pages the selection
3388          * affects. */
3389         first = n_pages;
3390         last = 0;
3391         if (view->continuous) {
3392                 start_page = 0;
3393                 end_page = n_pages;
3394         } else if (view->dual_page) {
3395                 start_page = view->start_page;
3396                 end_page = view->end_page + 1;
3397         } else {
3398                 start_page = view->current_page;
3399                 end_page = view->current_page + 1;
3400         }
3401
3402         for (i = start_page; i < end_page; i++) {
3403                 GdkRectangle page_area;
3404                 GtkBorder border;
3405
3406                 get_page_extents (view, i, &page_area, &border);
3407                 if (gdk_rectangle_point_in (&page_area, start) ||
3408                     gdk_rectangle_point_in (&page_area, stop)) {
3409                         if (first == n_pages)
3410                                 first = i;
3411                         last = i;
3412                 }
3413
3414         }
3415
3416
3417
3418         /* Now create a list of EvViewSelection's for the affected
3419          * pages.  This could be an empty list, a list of just one
3420          * page or a number of pages.*/
3421         for (i = first; i < last + 1; i++) {
3422                 GdkRectangle page_area;
3423                 GtkBorder border;
3424                 GdkPoint *point;
3425
3426                 ev_page_cache_get_size (view->page_cache, i,
3427                                         view->rotation,
3428                                         1.0, &width, &height);
3429
3430                 selection = g_new0 (EvViewSelection, 1);
3431                 selection->page = i;
3432                 selection->rect.x1 = selection->rect.y1 = 0;
3433                 selection->rect.x2 = width;
3434                 selection->rect.y2 = height;
3435
3436                 get_page_extents (view, i, &page_area, &border);
3437
3438                 if (gdk_rectangle_point_in (&page_area, start))
3439                         point = start;
3440                 else
3441                         point = stop;
3442
3443                 if (i == first)
3444                         view_point_to_doc_point (view, point, &page_area,
3445                                                  &selection->rect.x1,
3446                                                  &selection->rect.y1);
3447
3448                 /* If the selection is contained within just one page,
3449                  * make sure we don't write 'start' into both points
3450                  * in selection->rect. */
3451                 if (first == last)
3452                         point = stop;
3453
3454                 if (i == last)
3455                         view_point_to_doc_point (view, point, &page_area,
3456                                                  &selection->rect.x2,
3457                                                  &selection->rect.y2);
3458
3459                 list = g_list_append (list, selection);
3460         }
3461
3462         return list;
3463 }
3464
3465 /* This function takes the newly calculated list, and figures out which regions
3466  * have changed.  It then queues a redraw approporiately.
3467  */
3468 static void
3469 merge_selection_region (EvView *view,
3470                         GList  *new_list)
3471 {
3472         GList *old_list;
3473         GList *new_list_ptr, *old_list_ptr;
3474
3475         /* Update the selection */
3476         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3477         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3478         view->selection_info.selections = new_list;
3479         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3480         g_object_notify (G_OBJECT (view), "has-selection");
3481
3482         new_list_ptr = new_list;
3483         old_list_ptr = old_list;
3484
3485         while (new_list_ptr || old_list_ptr) {
3486                 EvViewSelection *old_sel, *new_sel;
3487                 int cur_page;
3488                 GdkRegion *region = NULL;
3489
3490                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3491                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3492
3493                 /* Assume that the lists are in order, and we run through them
3494                  * comparing them, one page at a time.  We come out with the
3495                  * first page we see. */
3496                 if (new_sel && old_sel) {
3497                         if (new_sel->page < old_sel->page) {
3498                                 new_list_ptr = new_list_ptr->next;
3499                                 old_sel = NULL;
3500                         } else if (new_sel->page > old_sel->page) {
3501                                 old_list_ptr = old_list_ptr->next;
3502                                 new_sel = NULL;
3503                         } else {
3504                                 new_list_ptr = new_list_ptr->next;
3505                                 old_list_ptr = old_list_ptr->next;
3506                         }
3507                 } else if (new_sel) {
3508                         new_list_ptr = new_list_ptr->next;
3509                 } else if (old_sel) {
3510                         old_list_ptr = old_list_ptr->next;
3511                 }
3512
3513                 g_assert (new_sel || old_sel);
3514
3515                 /* is the page we're looking at on the screen?*/
3516                 cur_page = new_sel ? new_sel->page : old_sel->page;
3517                 if (cur_page < view->start_page || cur_page > view->end_page)
3518                         continue;
3519
3520                 /* seed the cache with a new page.  We are going to need the new
3521                  * region too. */
3522                 if (new_sel) {
3523                         GdkRegion *tmp_region = NULL;
3524                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3525                                                               cur_page,
3526                                                               view->scale,
3527                                                               &tmp_region);
3528                         if (tmp_region) {
3529                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3530                         }
3531                 }
3532
3533                 /* Now we figure out what needs redrawing */
3534                 if (old_sel && new_sel) {
3535                         if (old_sel->covered_region &&
3536                             new_sel->covered_region) {
3537                                 /* We only want to redraw the areas that have
3538                                  * changed, so we xor the old and new regions
3539                                  * and redraw if it's different */
3540                                 region = gdk_region_copy (old_sel->covered_region);
3541                                 gdk_region_xor (region, new_sel->covered_region);
3542                                 if (gdk_region_empty (region)) {
3543                                         gdk_region_destroy (region);
3544                                         region = NULL;
3545                                 }
3546                         } else if (old_sel->covered_region) {
3547                                 region = gdk_region_copy (old_sel->covered_region);
3548                         } else if (new_sel->covered_region) {
3549                                 region = gdk_region_copy (new_sel->covered_region);
3550                         }
3551                 } else if (old_sel && !new_sel) {
3552                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3553                                 region = gdk_region_copy (old_sel->covered_region);
3554                         }
3555                 } else if (!old_sel && new_sel) {
3556                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3557                                 region = gdk_region_copy (new_sel->covered_region);
3558                         }
3559                 } else {
3560                         g_assert_not_reached ();
3561                 }
3562
3563                 /* Redraw the damaged region! */
3564                 if (region) {
3565                         GdkRectangle page_area;
3566                         GtkBorder border;
3567
3568                         get_page_extents (view, cur_page, &page_area, &border);
3569                         gdk_region_offset (region,
3570                                            page_area.x + border.left - view->scroll_x,
3571                                            page_area.y + border.top - view->scroll_y);
3572                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3573                         gdk_region_destroy (region);
3574                 }
3575         }
3576
3577         /* Free the old list, now that we're done with it. */
3578         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3579 }
3580
3581 static void
3582 compute_selections (EvView   *view,
3583                     GdkPoint *start,
3584                     GdkPoint *stop)
3585 {
3586         GList *list;
3587
3588         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3589                 list = compute_new_selection_rect (view, start, stop);
3590         else
3591                 list = compute_new_selection_text (view, start, stop);
3592         merge_selection_region (view, list);
3593 }
3594
3595 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3596  */
3597 static void
3598 selection_free (EvViewSelection *selection)
3599 {
3600         if (selection->covered_region)
3601                 gdk_region_destroy (selection->covered_region);
3602         g_free (selection);
3603 }
3604
3605 static void
3606 clear_selection (EvView *view)
3607 {
3608         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3609         view->selection_info.selections = NULL;
3610         view->selection_info.in_selection = FALSE;
3611         g_object_notify (G_OBJECT (view), "has-selection");
3612 }
3613
3614
3615 void
3616 ev_view_select_all (EvView *view)
3617 {
3618         int n_pages, i;
3619
3620         /* Disable selection on rotated pages for the 0.4.0 series */
3621         if (view->rotation != 0)
3622                 return;
3623
3624         clear_selection (view);
3625
3626         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3627         for (i = 0; i < n_pages; i++) {
3628                 int width, height;
3629                 EvViewSelection *selection;
3630
3631                 ev_page_cache_get_size (view->page_cache,
3632                                         i,
3633                                         view->rotation,
3634                                         1.0, &width, &height);
3635
3636                 selection = g_new0 (EvViewSelection, 1);
3637                 selection->page = i;
3638                 selection->rect.x1 = selection->rect.y1 = 0;
3639                 selection->rect.x2 = width;
3640                 selection->rect.y2 = height;
3641
3642                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3643         }
3644
3645         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3646         g_object_notify (G_OBJECT (view), "has-selection");
3647         gtk_widget_queue_draw (GTK_WIDGET (view));
3648 }
3649
3650 gboolean
3651 ev_view_get_has_selection (EvView *view)
3652 {
3653         return view->selection_info.selections != NULL;
3654 }
3655
3656 static char *
3657 get_selected_text (EvView *ev_view)
3658 {
3659         GString *text;
3660         GList *l;
3661
3662         text = g_string_new (NULL);
3663
3664         ev_document_doc_mutex_lock ();
3665
3666         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3667                 EvViewSelection *selection = (EvViewSelection *)l->data;
3668                 char *tmp;
3669
3670                 tmp = ev_document_get_text (ev_view->document,
3671                                             selection->page,
3672                                             &selection->rect);
3673                 g_string_append (text, tmp);
3674                 g_free (tmp);
3675         }
3676
3677         ev_document_doc_mutex_unlock ();
3678
3679         return g_string_free (text, FALSE);
3680 }
3681
3682 void
3683 ev_view_copy (EvView *ev_view)
3684 {
3685         GtkClipboard *clipboard;
3686         char *text;
3687
3688         if (!ev_document_can_get_text (ev_view->document)) {
3689                 return;
3690         }
3691
3692         text = get_selected_text (ev_view);
3693         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3694                                               GDK_SELECTION_CLIPBOARD);
3695         gtk_clipboard_set_text (clipboard, text, -1);
3696         g_free (text);
3697 }
3698
3699 static void
3700 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3701                         GtkSelectionData *selection_data,
3702                         guint             info,
3703                         gpointer          data)
3704 {
3705         EvView *ev_view = EV_VIEW (data);
3706         char *text;
3707
3708         if (!ev_document_can_get_text (ev_view->document)) {
3709                 return;
3710         }
3711
3712         text = get_selected_text (ev_view);
3713         gtk_selection_data_set_text (selection_data, text, -1);
3714         g_free (text);
3715 }
3716
3717 static void
3718 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3719                           gpointer      data)
3720 {
3721         EvView *view = EV_VIEW (data);
3722
3723         clear_selection (view);
3724 }
3725
3726 static void
3727 ev_view_update_primary_selection (EvView *ev_view)
3728 {
3729         GtkClipboard *clipboard;
3730
3731         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3732                                               GDK_SELECTION_PRIMARY);
3733
3734         if (ev_view->selection_info.selections) {
3735                 if (!gtk_clipboard_set_with_owner (clipboard,
3736                                                    targets,
3737                                                    G_N_ELEMENTS (targets),
3738                                                    ev_view_primary_get_cb,
3739                                                    ev_view_primary_clear_cb,
3740                                                    G_OBJECT (ev_view)))
3741                         ev_view_primary_clear_cb (clipboard, ev_view);
3742         } else {
3743                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3744                         gtk_clipboard_clear (clipboard);
3745         }
3746 }
3747
3748 /*** Cursor operations ***/
3749
3750 static GdkCursor *
3751 ev_view_create_invisible_cursor(void)
3752 {
3753        GdkBitmap *empty;
3754        GdkColor black = { 0, 0, 0, 0 };
3755        static char bits[] = { 0x00 };
3756
3757        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3758
3759        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3760 }
3761
3762 static void
3763 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3764 {
3765         GdkCursor *cursor = NULL;
3766         GdkDisplay *display;
3767         GtkWidget *widget;
3768
3769         if (view->cursor == new_cursor) {
3770                 return;
3771         }
3772
3773         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3774         display = gtk_widget_get_display (widget);
3775         view->cursor = new_cursor;
3776
3777         switch (new_cursor) {
3778                 case EV_VIEW_CURSOR_NORMAL:
3779                         gdk_window_set_cursor (widget->window, NULL);
3780                         break;
3781                 case EV_VIEW_CURSOR_IBEAM:
3782                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3783                         break;
3784                 case EV_VIEW_CURSOR_LINK:
3785                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3786                         break;
3787                 case EV_VIEW_CURSOR_WAIT:
3788                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3789                         break;
3790                 case EV_VIEW_CURSOR_HIDDEN:
3791                         cursor = ev_view_create_invisible_cursor ();
3792                         break;
3793                 case EV_VIEW_CURSOR_DRAG:
3794                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3795                         break;
3796         }
3797
3798         if (cursor) {
3799                 gdk_window_set_cursor (widget->window, cursor);
3800                 gdk_cursor_unref (cursor);
3801                 gdk_flush();
3802         }
3803 }
3804
3805 void
3806 ev_view_hide_cursor (EvView *view)
3807 {
3808        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3809 }
3810
3811 void
3812 ev_view_show_cursor (EvView *view)
3813 {
3814        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3815 }
3816
3817 gboolean
3818 ev_view_next_page (EvView *view)
3819 {
3820         int page;
3821
3822         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3823
3824         page = ev_page_cache_get_current_page (view->page_cache);
3825         page = ev_view_get_dual_page (view) ? page + 2 : page + 1;
3826
3827         if (page < ev_page_cache_get_n_pages (view->page_cache)) {
3828                 ev_page_cache_set_current_page (view->page_cache, page);
3829                 return TRUE;
3830         } else {
3831                 return FALSE;
3832         }
3833 }
3834
3835 gboolean
3836 ev_view_previous_page (EvView *view)
3837 {
3838         int page;
3839
3840         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3841
3842         page = ev_page_cache_get_current_page (view->page_cache);
3843         page = ev_view_get_dual_page (view) ? page - 2 : page - 1;
3844
3845         if (page >= 0) {
3846                 ev_page_cache_set_current_page (view->page_cache, page);
3847                 return TRUE;
3848         } else {
3849                 return FALSE;
3850         }
3851 }
3852
3853 /*** Enum description for usage in signal ***/
3854
3855 GType
3856 ev_sizing_mode_get_type (void)
3857 {
3858   static GType etype = 0;
3859   if (etype == 0) {
3860     static const GEnumValue values[] = {
3861       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3862       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3863       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3864       { 0, NULL, NULL }
3865     };
3866     etype = g_enum_register_static ("EvSizingMode", values);
3867   }
3868   return etype;
3869 }