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         SIGNAL_POPUP_MENU,
  68         N_SIGNALS,
  69 };
  70
  71 enum {
  72         TARGET_STRING,
  73         TARGET_TEXT,
  74         TARGET_COMPOUND_TEXT,
  75         TARGET_UTF8_STRING,
  76         TARGET_TEXT_BUFFER_CONTENTS
  77 };
  78
  79 static const GtkTargetEntry targets[] = {
  80         { "STRING", 0, TARGET_STRING },
  81         { "TEXT",   0, TARGET_TEXT },
  82         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  83         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  84 };
  85
  86 static guint signals[N_SIGNALS];
  87
  88 typedef enum {
  89         EV_VIEW_FIND_NEXT,
  90         EV_VIEW_FIND_PREV
  91 } EvViewFindDirection;
  92
  93 #define ZOOM_IN_FACTOR  1.2
  94 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  95
  96 #define MIN_SCALE 0.05409
  97 #define MAX_SCALE 4.0
  98
  99 #define SCROLL_TIME 150
 100
 101 /*** Scrolling ***/
 102 static void       scroll_to_current_page                     (EvView *view,
 103                                                               GtkOrientation orientation);
 104 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 105                                                               GtkAdjustment      *hadjustment,
 106                                                               GtkAdjustment      *vadjustment);
 107 static void       view_update_range_and_current_page         (EvView             *view);
 108 static void       set_scroll_adjustment                      (EvView             *view,
 109                                                               GtkOrientation      orientation,
 110                                                               GtkAdjustment      *adjustment);
 111 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 112                                                               GtkAdjustment      *hadjustment,
 113                                                               GtkAdjustment      *vadjustment);
 114 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 115                                                               guint               keyval,
 116                                                               GtkScrollType       scroll,
 117                                                               gboolean            horizontal);
 118 static void       ev_view_binding_activated                  (EvView             *view,
 119                                                               GtkScrollType       scroll,
 120                                                               gboolean            horizontal);
 121 static void       ensure_rectangle_is_visible                (EvView             *view,
 122                                                               GdkRectangle       *rect);
 123
 124 /*** Geometry computations ***/
 125 static void       compute_border                             (EvView             *view,
 126                                                               int                 width,
 127                                                               int                 height,
 128                                                               GtkBorder          *border);
 129 static void       get_page_y_offset                          (EvView *view,
 130                                                               int page,
 131                                                               double zoom,
 132                                                               int *y_offset);
 133 static gboolean   get_page_extents                           (EvView             *view,
 134                                                               gint                page,
 135                                                               GdkRectangle       *page_area,
 136                                                               GtkBorder          *border);
 137 static void       view_rect_to_doc_rect                      (EvView             *view,
 138                                                               GdkRectangle       *view_rect,
 139                                                               GdkRectangle       *page_area,
 140                                                               EvRectangle        *doc_rect);
 141 static void       doc_rect_to_view_rect                      (EvView             *view,
 142                                                               int                 page,
 143                                                               EvRectangle        *doc_rect,
 144                                                               GdkRectangle       *view_rect);
 145 static void       find_page_at_location                      (EvView             *view,
 146                                                               gdouble             x,
 147                                                               gdouble             y,
 148                                                               gint               *page,
 149                                                               gint               *x_offset,
 150                                                               gint               *y_offset);
 151 static gboolean  doc_point_to_view_point                     (EvView       *view,
 152                                                               int           page,
 153                                                               EvPoint      *doc_point,
 154                                                               GdkPoint     *view_point);
 155 /*** Hyperrefs ***/
 156 static EvLink *   ev_view_get_link_at_location               (EvView  *view,
 157                                                               gdouble  x,
 158                                                               gdouble  y);
 159 static char*      tip_from_link                              (EvView             *view,
 160                                                               EvLink             *link);
 161 static void       handle_link_over_xy                        (EvView *view,
 162                                                               gint x,
 163                                                               gint y);
 164 /*** GtkWidget implementation ***/
 165 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 166                                                               GtkRequisition     *requisition);
 167 static void       ev_view_size_request_continuous            (EvView             *view,
 168                                                               GtkRequisition     *requisition);
 169 static void       ev_view_size_request_dual_page             (EvView             *view,
 170                                                               GtkRequisition     *requisition);
 171 static void       ev_view_size_request_single_page           (EvView             *view,
 172                                                               GtkRequisition     *requisition);
 173 static void       ev_view_size_request                       (GtkWidget          *widget,
 174                                                               GtkRequisition     *requisition);
 175 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 176                                                               GtkAllocation      *allocation);
 177 static void       ev_view_realize                            (GtkWidget          *widget);
 178 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 179                                                               GdkEventScroll     *event);
 180 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 181                                                               GdkEventExpose     *event);
 182 static gboolean   ev_view_popup_menu                         (GtkWidget          *widget);
 183 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 184                                                               GdkEventButton     *event);
 185 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 186                                                               GdkEventMotion     *event);
 187 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 188                                                               GdkEventButton     *event);
 189 static gboolean   ev_view_enter_notify_event                 (GtkWidget          *widget,
 190                                                               GdkEventCrossing   *event);
 191 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 192                                                               GdkEventCrossing   *event);
 193 static void       ev_view_style_set                          (GtkWidget          *widget,
 194                                                               GtkStyle           *old_style);
 195
 196 static AtkObject *ev_view_get_accessible                     (GtkWidget *widget);
 197
 198 /*** Drawing ***/
 199 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 200 static void       draw_rubberband                            (GtkWidget          *widget,
 201                                                               GdkWindow          *window,
 202                                                               const GdkRectangle *rect,
 203                                                               guchar              alpha);
 204 static void       highlight_find_results                     (EvView             *view,
 205                                                               int                 page);
 206 static void       draw_one_page                              (EvView             *view,
 207                                                               gint                page,
 208                                                               GdkRectangle       *page_area,
 209                                                               GtkBorder          *border,
 210                                                               GdkRectangle       *expose_area);
 211
 212 /*** Callbacks ***/
 213 static void       find_changed_cb                            (EvDocument         *document,
 214                                                               int                 page,
 215                                                               EvView             *view);
 216 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 217                                                               EvView             *view);
 218 static void       page_changed_cb                            (EvPageCache        *page_cache,
 219                                                               int                 new_page,
 220                                                               EvView             *view);
 221 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 222                                                               EvView             *view);
 223
 224 /*** GObject ***/
 225 static void       ev_view_finalize                           (GObject            *object);
 226 static void       ev_view_destroy                            (GtkObject          *object);
 227 static void       ev_view_set_property                       (GObject            *object,
 228                                                               guint               prop_id,
 229                                                               const GValue       *value,
 230                                                               GParamSpec         *pspec);
 231 static void       ev_view_get_property                       (GObject            *object,
 232                                                               guint               prop_id,
 233                                                               GValue             *value,
 234                                                               GParamSpec         *pspec);
 235 static void       ev_view_class_init                         (EvViewClass        *class);
 236 static void       ev_view_init                               (EvView             *view);
 237
 238 /*** Zoom and sizing ***/
 239 static double   zoom_for_size_fit_width                      (int doc_width,
 240                                                               int doc_height,
 241                                                               int target_width,
 242                                                               int target_height,
 243                                                               int vsb_width);
 244 static double   zoom_for_size_fit_height                     (int doc_width,
 245                                                               int doc_height,
 246                                                               int target_width,
 247                                                               int target_height,
 248                                                               int vsb_height);
 249 static double   zoom_for_size_best_fit                       (int doc_width,
 250                                                               int doc_height,
 251                                                               int target_width,
 252                                                               int target_height,
 253                                                               int vsb_width,
 254                                                               int hsb_width);
 255 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 256                                                               int     width,
 257                                                               int     height);
 258 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 259                                                                 int     width,
 260                                                                 int     height,
 261                                                                 int     vsb_width,
 262                                                                 int     hsb_height);
 263 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 264                                                                 int     width,
 265                                                                 int     height,
 266                                                                 int     vsb_width,
 267                                                                 int     hsb_height);
 268 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 269                                                                 int     width,
 270                                                                 int     height,
 271                                                                 int     vsb_width,
 272                                                                 int     hsb_height);
 273 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 274                                                                 int     width,
 275                                                                 int     height,
 276                                                                 int     vsb_width,
 277                                                                 int     hsb_height);
 278 /*** Cursors ***/
 279 static GdkCursor* ev_view_create_invisible_cursor            (void);
 280 static void       ev_view_set_cursor                         (EvView             *view,
 281                                                               EvViewCursor        new_cursor);
 282
 283 /*** Status messages ***/
 284 static void       ev_view_set_status                         (EvView             *view,
 285                                                               const char         *message);
 286 static void       update_find_status_message                 (EvView             *view);
 287 static void       ev_view_set_find_status                    (EvView             *view,
 288                                                               const char         *message);
 289 /*** Find ***/
 290 static void       jump_to_find_result                        (EvView             *view);
 291 static void       jump_to_find_page                          (EvView             *view,
 292                                                               EvViewFindDirection direction);
 293
 294 /*** Selection ***/
 295 static void       compute_selections                         (EvView             *view,
 296                                                               GdkPoint           *start,
 297                                                               GdkPoint           *stop);
 298 static void       clear_selection                            (EvView             *view);
 299 static void       selection_free                             (EvViewSelection    *selection);
 300 static char*      get_selected_text                          (EvView             *ev_view);
 301 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 302                                                               GtkSelectionData   *selection_data,
 303                                                               guint               info,
 304                                                               gpointer            data);
 305 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 306                                                               gpointer            data);
 307 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 308
 309
 310 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 311
 312 static void
 313 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 314 {
 315         GdkPoint view_point;
 316
 317         if (view->document == NULL) {
 318                 return;
 319         }
 320
 321         doc_point_to_view_point (view, view->current_page, &view->pending_point, &view_point);
 322
 323         if (orientation == GTK_ORIENTATION_VERTICAL) {
 324                 view->pending_point.y = 0;
 325         } else {
 326                 view->pending_point.x = 0;
 327         }
 328
 329         if (orientation == GTK_ORIENTATION_VERTICAL) {
 330                 if (view->continuous) {
 331                         gtk_adjustment_clamp_page (view->vadjustment,
 332                                                    view_point.y - view->spacing / 2,
 333                                                    view_point.y + view->vadjustment->page_size);
 334                 } else {
 335                         gtk_adjustment_set_value (view->vadjustment,
 336                                                   CLAMP (view_point.y,
 337                                                   view->vadjustment->lower,
 338                                                   view->vadjustment->upper -
 339                                                   view->vadjustment->page_size));
 340                 }
 341         } else {
 342                 if (view->dual_page) {
 343                         gtk_adjustment_clamp_page (view->hadjustment,
 344                                                    view_point.x,
 345                                                    view_point.x + view->hadjustment->page_size);
 346                 } else {
 347                         gtk_adjustment_set_value (view->hadjustment,
 348                                                   CLAMP (view_point.x,
 349                                                   view->hadjustment->lower,
 350                                                   view->hadjustment->upper -
 351                                                   view->hadjustment->page_size));
 352                 }
 353         }
 354 }
 355
 356 static void
 357 view_set_adjustment_values (EvView         *view,
 358                             GtkOrientation  orientation)
 359 {
 360         GtkWidget *widget = GTK_WIDGET (view);
 361         GtkAdjustment *adjustment;
 362         int requisition;
 363         int allocation;
 364
 365         double factor;
 366         gint new_value;
 367
 368         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 369                 requisition = widget->requisition.width;
 370                 allocation = widget->allocation.width;
 371                 adjustment = view->hadjustment;
 372         } else {
 373                 requisition = widget->requisition.height;
 374                 allocation = widget->allocation.height;
 375                 adjustment = view->vadjustment;
 376         }
 377
 378         if (!adjustment)
 379                 return;
 380
 381         factor = 1.0;
 382         switch (view->pending_scroll) {
 383                 case SCROLL_TO_KEEP_POSITION:
 384                         factor = (adjustment->value) / adjustment->upper;
 385                         break;
 386                 case SCROLL_TO_PAGE_POSITION:
 387                         break;
 388                 case SCROLL_TO_CENTER:
 389                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 390                         break;
 391         }
 392
 393         adjustment->page_size = allocation;
 394         adjustment->step_increment = allocation * 0.1;
 395         adjustment->page_increment = allocation * 0.9;
 396         adjustment->lower = 0;
 397         adjustment->upper = MAX (allocation, requisition);
 398
 399         /*
 400          * We add 0.5 to the values before to average out our rounding errors.
 401          */
 402         switch (view->pending_scroll) {
 403                 case SCROLL_TO_KEEP_POSITION:
 404                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 405                         gtk_adjustment_set_value (adjustment, (int)new_value);
 406                         break;
 407                 case SCROLL_TO_PAGE_POSITION:
 408                         scroll_to_current_page (view, orientation);
 409                         break;
 410                 case SCROLL_TO_CENTER:
 411                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 412                                            0, adjustment->upper - adjustment->page_size);
 413                         gtk_adjustment_set_value (adjustment, (int)new_value);
 414                         break;
 415         }
 416
 417         gtk_adjustment_changed (adjustment);
 418 }
 419
 420 static void
 421 view_update_range_and_current_page (EvView *view)
 422 {
 423         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 424                 return;
 425
 426         /* Presentation trumps all other modes */
 427         if (view->presentation) {
 428                 view->start_page = view->current_page;
 429                 view->end_page = view->current_page;
 430         } else if (view->continuous) {
 431                 GdkRectangle current_area, unused, page_area;
 432                 GtkBorder border;
 433                 gint current_page;
 434                 gboolean found = FALSE;
 435                 int i;
 436
 437                 if (!(view->vadjustment && view->hadjustment))
 438                         return;
 439
 440                 current_area.x = view->hadjustment->value;
 441                 current_area.width = view->hadjustment->upper;
 442                 current_area.y = view->vadjustment->value;
 443                 current_area.height = view->vadjustment->page_size;
 444
 445                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 446
 447                         get_page_extents (view, i, &page_area, &border);
 448
 449                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 450                                 if (! found) {
 451                                         view->start_page = i;
 452                                         found = TRUE;
 453
 454                                 }
 455                                 view->end_page = i;
 456                         } else if (found) {
 457                                 break;
 458                         }
 459                 }
 460
 461                 current_page = ev_page_cache_get_current_page (view->page_cache);
 462
 463                 if (current_page < view->start_page || current_page > view->end_page) {
 464                         view->current_page = view->start_page;
 465                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 466                 }
 467         } else {
 468                 if (view->dual_page) {
 469                         if (view->current_page % 2 == 0) {
 470                                 view->start_page = view->current_page;
 471                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 472                                         view->end_page = view->start_page + 1;
 473                                 else
 474                                         view->end_page = view->start_page;
 475                         } else {
 476                                 view->start_page = view->current_page - 1;
 477                                 view->end_page = view->current_page;
 478                         }
 479                 } else {
 480                         view->start_page = view->current_page;
 481                         view->end_page = view->current_page;
 482                 }
 483         }
 484
 485         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 486                                         view->start_page,
 487                                         view->end_page,
 488                                         view->rotation,
 489                                         view->scale,
 490                                         view->selection_info.selections);
 491 }
 492
 493 static void
 494 set_scroll_adjustment (EvView *view,
 495                        GtkOrientation  orientation,
 496                        GtkAdjustment  *adjustment)
 497 {
 498         GtkAdjustment **to_set;
 499
 500         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 501                 to_set = &view->hadjustment;
 502         else
 503                 to_set = &view->vadjustment;
 504
 505         if (*to_set != adjustment) {
 506                 if (*to_set) {
 507                         g_signal_handlers_disconnect_by_func (*to_set,
 508                                                               (gpointer) on_adjustment_value_changed,
 509                                                               view);
 510                         g_object_unref (*to_set);
 511                 }
 512
 513                 *to_set = adjustment;
 514                 view_set_adjustment_values (view, orientation);
 515
 516                 if (*to_set) {
 517                         g_object_ref (*to_set);
 518                         g_signal_connect (*to_set, "value_changed",
 519                                           G_CALLBACK (on_adjustment_value_changed), view);
 520                 }
 521         }
 522 }
 523
 524 static void
 525 ev_view_set_scroll_adjustments (EvView *view,
 526                                 GtkAdjustment  *hadjustment,
 527                                 GtkAdjustment  *vadjustment)
 528 {
 529         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 530         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 531
 532         on_adjustment_value_changed (NULL, view);
 533 }
 534
 535 static void
 536 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 537                            guint           keyval,
 538                            GtkScrollType   scroll,
 539                            gboolean        horizontal)
 540 {
 541   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 542
 543   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 544                                 "binding_activated", 2,
 545                                 GTK_TYPE_SCROLL_TYPE, scroll,
 546                                 G_TYPE_BOOLEAN, horizontal);
 547   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 548                                 "binding_activated", 2,
 549                                 GTK_TYPE_SCROLL_TYPE, scroll,
 550                                 G_TYPE_BOOLEAN, horizontal);
 551 }
 552
 553 void
 554 ev_view_scroll (EvView        *view,
 555                 EvScrollType   scroll)
 556 {
 557         GtkAdjustment *adjustment;
 558         double value, increment;
 559         gboolean first_page = FALSE;
 560         gboolean last_page = FALSE;
 561
 562         /* Assign values for increment and vertical adjustment */
 563         adjustment = view->vadjustment;
 564         increment = adjustment->page_size * 0.75;
 565         value = adjustment->value;
 566
 567         /* Assign boolean for first and last page */
 568         if (view->current_page == 0)
 569                 first_page = TRUE;
 570         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 571                 last_page = TRUE;
 572
 573         switch (scroll) {
 574                 case EV_SCROLL_PAGE_BACKWARD:
 575                         /* Do not jump backwards if at the first page */
 576                         if (value == (adjustment->lower) && first_page) {
 577                                 /* Do nothing */
 578                                 /* At the top of a page, assign the upper bound limit of previous page */
 579                         } else if (value == (adjustment->lower)) {
 580                                 value = adjustment->upper - adjustment->page_size;
 581                                 ev_view_previous_page (view);
 582                                 /* Jump to the top */
 583                         } else {
 584                                 value = MAX (value - increment, adjustment->lower);
 585                         }
 586                         break;
 587                 case EV_SCROLL_PAGE_FORWARD:
 588                         /* Do not jump forward if at the last page */
 589                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 590                                 /* Do nothing */
 591                         /* At the bottom of a page, assign the lower bound limit of next page */
 592                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 593                                 value = 0;
 594                                 ev_view_next_page (view);
 595                         /* Jump to the bottom */
 596                         } else {
 597                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 598                         }
 599                         break;
 600                 default:
 601                         break;
 602         }
 603
 604         gtk_adjustment_set_value (adjustment, value);
 605 }
 606
 607 static void
 608 ev_view_binding_activated (EvView *view,
 609                            GtkScrollType scroll,
 610                            gboolean horizontal)
 611 {
 612         GtkAdjustment *adjustment;
 613         double value;
 614
 615         if (view->presentation) {
 616                 switch (scroll) {
 617                         case GTK_SCROLL_STEP_BACKWARD:
 618                                 ev_view_previous_page (view);
 619                                 break;
 620                         case GTK_SCROLL_STEP_FORWARD:
 621                                 ev_view_next_page (view);
 622                                 break;
 623                         default:
 624                                 break;
 625                 }
 626                 return;
 627         }
 628
 629         if (horizontal) {
 630                 adjustment = view->hadjustment;
 631         } else {
 632                 adjustment = view->vadjustment;
 633         }
 634
 635         value = adjustment->value;
 636
 637         switch (scroll) {
 638                 case GTK_SCROLL_STEP_BACKWARD:
 639                         value -= adjustment->step_increment;
 640                         break;
 641                 case GTK_SCROLL_STEP_FORWARD:
 642                         value += adjustment->step_increment;
 643                         break;
 644                 default:
 645                         break;
 646         }
 647
 648         value = CLAMP (value, adjustment->lower,
 649                        adjustment->upper - adjustment->page_size);
 650
 651         gtk_adjustment_set_value (adjustment, value);
 652 }
 653
 654 #define MARGIN 5
 655
 656 static void
 657 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 658 {
 659         GtkWidget *widget = GTK_WIDGET (view);
 660         GtkAdjustment *adjustment;
 661         int value;
 662
 663         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 664
 665         adjustment = view->vadjustment;
 666
 667         if (rect->y < adjustment->value) {
 668                 value = MAX (adjustment->lower, rect->y - MARGIN);
 669                 gtk_adjustment_set_value (view->vadjustment, value);
 670         } else if (rect->y + rect->height >
 671                    adjustment->value + widget->allocation.height) {
 672                 value = MIN (adjustment->upper, rect->y + rect->height -
 673                              widget->allocation.height + MARGIN);
 674                 gtk_adjustment_set_value (view->vadjustment, value);
 675         }
 676
 677         adjustment = view->hadjustment;
 678
 679         if (rect->x < adjustment->value) {
 680                 value = MAX (adjustment->lower, rect->x - MARGIN);
 681                 gtk_adjustment_set_value (view->hadjustment, value);
 682         } else if (rect->x + rect->height >
 683                    adjustment->value + widget->allocation.width) {
 684                 value = MIN (adjustment->upper, rect->x + rect->width -
 685                              widget->allocation.width + MARGIN);
 686                 gtk_adjustment_set_value (view->hadjustment, value);
 687         }
 688 }
 689
 690 /*** Geometry computations ***/
 691
 692 static void
 693 compute_border (EvView *view, int width, int height, GtkBorder *border)
 694 {
 695         if (view->presentation) {
 696                 border->left = 0;
 697                 border->right = 0;
 698                 border->top = 0;
 699                 border->bottom = 0;
 700         } else {
 701                 ev_document_misc_get_page_border_size (width, height, border);
 702         }
 703 }
 704
 705 static void
 706 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 707 {
 708         int max_width, offset;
 709         GtkBorder border;
 710
 711         g_return_if_fail (y_offset != NULL);
 712
 713         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 714
 715         compute_border (view, max_width, max_width, &border);
 716
 717         if (view->dual_page) {
 718                 ev_page_cache_get_height_to_page (view->page_cache, page,
 719                                                   view->rotation, zoom, NULL, &offset);
 720                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 721         } else {
 722                 ev_page_cache_get_height_to_page (view->page_cache, page,
 723                                                   view->rotation, zoom, &offset, NULL);
 724                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 725         }
 726
 727         *y_offset = offset;
 728         return;
 729 }
 730
 731 static gboolean
 732 get_page_extents (EvView       *view,
 733                   gint          page,
 734                   GdkRectangle *page_area,
 735                   GtkBorder    *border)
 736 {
 737         GtkWidget *widget;
 738         int width, height;
 739
 740         widget = GTK_WIDGET (view);
 741
 742         /* Get the size of the page */
 743         ev_page_cache_get_size (view->page_cache, page,
 744                                 view->rotation,
 745                                 view->scale,
 746                                 &width, &height);
 747         compute_border (view, width, height, border);
 748         page_area->width = width + border->left + border->right;
 749         page_area->height = height + border->top + border->bottom;
 750
 751         if (view->presentation) {
 752                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 753                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 754         } else if (view->continuous) {
 755                 gint max_width;
 756                 gint x, y;
 757
 758                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 759                                              view->scale, &max_width);
 760                 max_width = max_width + border->left + border->right;
 761                 /* Get the location of the bounding box */
 762                 if (view->dual_page) {
 763                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 764                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 765                         if (page % 2 == 0)
 766                                 x = x + (max_width - width - border->left - border->right);
 767                 } else {
 768                         x = view->spacing;
 769                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 770                 }
 771
 772                 get_page_y_offset (view, page, view->scale, &y);
 773
 774                 page_area->x = x;
 775                 page_area->y = y;
 776         } else {
 777                 gint x, y;
 778                 if (view->dual_page) {
 779                         gint width_2, height_2;
 780                         gint max_width = width;
 781                         gint max_height = height;
 782                         GtkBorder overall_border;
 783                         gint other_page;
 784
 785                         other_page = page ^ 1;
 786
 787                         /* First, we get the bounding box of the two pages */
 788                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 789                                 ev_page_cache_get_size (view->page_cache,
 790                                                         other_page,
 791                                                         view->rotation,
 792                                                         view->scale,
 793                                                         &width_2, &height_2);
 794                                 if (width_2 > width)
 795                                         max_width = width_2;
 796                                 if (height_2 > height)
 797                                         max_height = height_2;
 798                         }
 799                         compute_border (view, max_width, max_height, &overall_border);
 800
 801                         /* Find the offsets */
 802                         x = view->spacing;
 803                         y = view->spacing;
 804
 805                         /* Adjust for being the left or right page */
 806                         if (page % 2 == 0)
 807                                 x = x + max_width - width;
 808                         else
 809                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 810
 811                         y = y + (max_height - height)/2;
 812
 813                         /* Adjust for extra allocation */
 814                         x = x + MAX (0, widget->allocation.width -
 815                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 816                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 817                 } else {
 818                         x = view->spacing;
 819                         y = view->spacing;
 820
 821                         /* Adjust for extra allocation */
 822                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 823                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 824                 }
 825
 826                 page_area->x = x;
 827                 page_area->y = y;
 828         }
 829
 830         return TRUE;
 831 }
 832
 833 static void
 834 view_point_to_doc_point (EvView *view,
 835                          GdkPoint *view_point,
 836                          GdkRectangle *page_area,
 837                          double  *doc_point_x,
 838                          double  *doc_point_y)
 839 {
 840         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 841         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 842 }
 843
 844 static void
 845 view_rect_to_doc_rect (EvView *view,
 846                        GdkRectangle *view_rect,
 847                        GdkRectangle *page_area,
 848                        EvRectangle  *doc_rect)
 849 {
 850         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 851         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 852         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 853         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 854 }
 855
 856 static gboolean
 857 doc_point_to_view_point (EvView       *view,
 858                          int           page,
 859                          EvPoint      *doc_point,
 860                          GdkPoint     *view_point)
 861 {
 862         GdkRectangle page_area;
 863         GtkBorder border;
 864         double x, y, view_x, view_y;
 865         int width, height;
 866
 867         ev_page_cache_get_size (view->page_cache, page,
 868                                 view->rotation,
 869                                 1.0,
 870                                 &width, &height);
 871
 872         if (view->rotation == 0) {
 873                 x = doc_point->x;
 874                 y = doc_point->y;
 875         } else if (view->rotation == 90) {
 876                 x = width - doc_point->y;
 877                 y = doc_point->x;
 878         } else if (view->rotation == 180) {
 879                 x = width - doc_point->x;
 880                 y = height - doc_point->y;
 881         } else if (view->rotation == 270) {
 882                 x = doc_point->y;
 883                 y = height - doc_point->x;
 884         } else {
 885                 g_assert_not_reached ();
 886         }
 887
 888         get_page_extents (view, page, &page_area, &border);
 889
 890         view_x = x * view->scale;
 891         view_y = y * view->scale;
 892         view_point->x = view_x + page_area.x;
 893         view_point->y = view_y + page_area.y;
 894
 895         return (view_x > 0 && view_x <= page_area.width &&
 896                 view_y > 0 && view_y <= page_area.height);
 897 }
 898
 899 static void
 900 doc_rect_to_view_rect (EvView       *view,
 901                        int           page,
 902                        EvRectangle  *doc_rect,
 903                        GdkRectangle *view_rect)
 904 {
 905         GdkRectangle page_area;
 906         GtkBorder border;
 907         double x, y, w, h;
 908         int width, height;
 909
 910         ev_page_cache_get_size (view->page_cache, page,
 911                                 view->rotation,
 912                                 1.0,
 913                                 &width, &height);
 914
 915         if (view->rotation == 0) {
 916                 x = doc_rect->x1;
 917                 y = doc_rect->y1;
 918                 w = doc_rect->x2 - doc_rect->x1;
 919                 h = doc_rect->y2 - doc_rect->y1;
 920         } else if (view->rotation == 90) {
 921                 x = width - doc_rect->y2;
 922                 y = doc_rect->x1;
 923                 w = doc_rect->y2 - doc_rect->y1;
 924                 h = doc_rect->x2 - doc_rect->x1;
 925         } else if (view->rotation == 180) {
 926                 x = width - doc_rect->x2;
 927                 y = height - doc_rect->y2;
 928                 w = doc_rect->x2 - doc_rect->x1;
 929                 h = doc_rect->y2 - doc_rect->y1;
 930         } else if (view->rotation == 270) {
 931                 x = doc_rect->y1;
 932                 y = height - doc_rect->x2;
 933                 w = doc_rect->y2 - doc_rect->y1;
 934                 h = doc_rect->x2 - doc_rect->x1;
 935         } else {
 936                 g_assert_not_reached ();
 937         }
 938
 939         get_page_extents (view, page, &page_area, &border);
 940
 941         view_rect->x = x * view->scale + page_area.x;
 942         view_rect->y = y * view->scale + page_area.y;
 943         view_rect->width = w * view->scale;
 944         view_rect->height = h * view->scale;
 945 }
 946
 947 static void
 948 find_page_at_location (EvView  *view,
 949                        gdouble  x,
 950                        gdouble  y,
 951                        gint    *page,
 952                        gint    *x_offset,
 953                        gint    *y_offset)
 954 {
 955         int i;
 956
 957         if (view->document == NULL)
 958                 return;
 959
 960         g_assert (page);
 961         g_assert (x_offset);
 962         g_assert (y_offset);
 963
 964         for (i = view->start_page; i <= view->end_page; i++) {
 965                 GdkRectangle page_area;
 966                 GtkBorder border;
 967
 968                 if (! get_page_extents (view, i, &page_area, &border))
 969                         continue;
 970
 971                 if ((x >= page_area.x + border.left) &&
 972                     (x < page_area.x + page_area.width - border.right) &&
 973                     (y >= page_area.y + border.top) &&
 974                     (y < page_area.y + page_area.height - border.bottom)) {
 975                         *page = i;
 976                         *x_offset = x - (page_area.x + border.left);
 977                         *y_offset = y - (page_area.y + border.top);
 978                         return;
 979                 }
 980         }
 981
 982         *page = -1;
 983 }
 984
 985 static gboolean
 986 location_in_text (EvView  *view,
 987                   gdouble  x,
 988                   gdouble  y)
 989 {
 990         GdkRegion *region;
 991         gint page = -1;
 992         gint x_offset = 0, y_offset = 0;
 993
 994         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 995
 996         if (page == -1)
 997                 return FALSE;
 998
 999         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1000
1001         if (region)
1002                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1003         else
1004                 return FALSE;
1005 }
1006
1007 static int
1008 ev_view_get_width (EvView *view)
1009 {
1010         return GTK_WIDGET (view)->allocation.width;
1011 }
1012
1013 static int
1014 ev_view_get_height (EvView *view)
1015 {
1016         return GTK_WIDGET (view)->allocation.height;
1017 }
1018
1019 static gboolean
1020 location_in_selected_text (EvView  *view,
1021                            gdouble  x,
1022                            gdouble  y)
1023 {
1024         gint page = -1;
1025         gint x_offset = 0, y_offset = 0;
1026         EvViewSelection *selection;
1027         GList *l = NULL;
1028
1029         for (l = view->selection_info.selections; l != NULL; l = l->next) {
1030                 selection = (EvViewSelection *)l->data;
1031
1032                 find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1033
1034                 if (page != selection->page)
1035                         continue;
1036
1037                 if (selection->covered_region &&
1038                     gdk_region_point_in (selection->covered_region, x_offset, y_offset))
1039                         return TRUE;
1040         }
1041
1042         return FALSE;
1043 }
1044
1045 /*** Hyperref ***/
1046 static EvLink *
1047 ev_view_get_link_at_location (EvView  *view,
1048                               gdouble  x,
1049                               gdouble  y)
1050 {
1051         gint page = -1;
1052         gint x_offset = 0, y_offset = 0;
1053         GList *link_mapping;
1054
1055         x += view->scroll_x;
1056         y += view->scroll_y;
1057
1058         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1059
1060         if (page == -1)
1061                 return NULL;
1062
1063         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1064
1065         if (link_mapping)
1066                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1067         else
1068                 return NULL;
1069 }
1070
1071 static void
1072 goto_fitr_link (EvView *view, EvLink *link)
1073 {
1074         EvPoint doc_point;
1075         int page;
1076         double zoom;
1077
1078         zoom = zoom_for_size_best_fit (ev_link_get_right (link) - ev_link_get_left (link),
1079                                        ev_link_get_top (link) - ev_link_get_bottom (link),
1080                                        ev_view_get_width (view),
1081                                        ev_view_get_height (view), 0, 0);
1082
1083         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1084         ev_view_set_zoom (view, zoom, FALSE);
1085
1086         page = ev_link_get_page (link);
1087         doc_point.x = ev_link_get_left (link);
1088         doc_point.y = ev_link_get_top (link);
1089
1090         view->current_page = page;
1091         view->pending_point = doc_point;
1092         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1093
1094         gtk_widget_queue_resize (GTK_WIDGET (view));
1095 }
1096
1097 static void
1098 goto_fitv_link (EvView *view, EvLink *link)
1099 {
1100         EvPoint doc_point;
1101         int doc_width, doc_height, page;
1102         double zoom;
1103
1104         page = ev_link_get_page (link);
1105         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1106
1107         doc_point.x = ev_link_get_left (link);
1108         doc_point.y = 0;
1109
1110         zoom = zoom_for_size_fit_height (doc_width - doc_point.x , doc_height,
1111                                          ev_view_get_width (view),
1112                                          ev_view_get_height (view), 0);
1113
1114         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1115         ev_view_set_zoom (view, zoom, FALSE);
1116
1117         view->current_page = page;
1118         view->pending_point = doc_point;
1119         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1120
1121         gtk_widget_queue_resize (GTK_WIDGET (view));
1122 }
1123
1124 static void
1125 goto_fith_link (EvView *view, EvLink *link)
1126 {
1127         EvPoint doc_point;
1128         int doc_width, doc_height, page;
1129         double zoom;
1130
1131         page = ev_link_get_page (link);
1132         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1133
1134         doc_point.x = 0;
1135         doc_point.y = doc_height - ev_link_get_top (link);
1136
1137         zoom = zoom_for_size_fit_width (doc_width, ev_link_get_top (link),
1138                                         ev_view_get_width (view),
1139                                         ev_view_get_height (view), 0);
1140
1141         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1142         ev_view_set_zoom (view, zoom, FALSE);
1143
1144         view->current_page = page;
1145         view->pending_point = doc_point;
1146         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1147
1148         gtk_widget_queue_resize (GTK_WIDGET (view));
1149 }
1150
1151 static void
1152 goto_fit_link (EvView *view, EvLink *link)
1153 {
1154         double zoom;
1155         int doc_width, doc_height;
1156         int page;
1157
1158         page = ev_link_get_page (link);
1159         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, &doc_width, &doc_height);
1160
1161         zoom = zoom_for_size_best_fit (doc_width, doc_height, ev_view_get_width (view),
1162                                        ev_view_get_height (view), 0, 0);
1163
1164         ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1165         ev_view_set_zoom (view, zoom, FALSE);
1166
1167         view->current_page = page;
1168         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1169
1170         gtk_widget_queue_resize (GTK_WIDGET (view));
1171 }
1172
1173 static void
1174 goto_xyz_link (EvView *view, EvLink *link)
1175 {
1176         EvPoint doc_point;
1177         int height, page;
1178         double zoom;
1179
1180         zoom = ev_link_get_zoom (link);
1181         page = ev_link_get_page (link);
1182         ev_page_cache_get_size (view->page_cache, page, 0, 1.0, NULL, &height);
1183
1184         if (zoom != 0) {
1185                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1186                 ev_view_set_zoom (view, zoom, FALSE);
1187         }
1188
1189         doc_point.x = ev_link_get_left (link);
1190         doc_point.y = height - ev_link_get_top (link);
1191
1192         view->current_page = page;
1193         view->pending_point = doc_point;
1194         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
1195
1196         gtk_widget_queue_resize (GTK_WIDGET (view));
1197 }
1198
1199 void
1200 ev_view_goto_link (EvView *view, EvLink *link)
1201 {
1202         EvLinkType type;
1203         int page;
1204
1205         type = ev_link_get_link_type (link);
1206
1207         switch (type) {
1208                 case EV_LINK_TYPE_TITLE:
1209                         break;
1210                 case EV_LINK_TYPE_PAGE:
1211                         page = ev_link_get_page (link);
1212                         ev_page_cache_set_current_page (view->page_cache, page);
1213                         break;
1214                 case EV_LINK_TYPE_PAGE_FIT:
1215                         goto_fit_link (view, link);
1216                         break;
1217                 case EV_LINK_TYPE_PAGE_FITH:
1218                         goto_fith_link (view, link);
1219                         break;
1220                 case EV_LINK_TYPE_PAGE_FITV:
1221                         goto_fitv_link (view, link);
1222                         break;
1223                 case EV_LINK_TYPE_PAGE_FITR:
1224                         goto_fitr_link (view, link);
1225                         break;
1226                 case EV_LINK_TYPE_PAGE_XYZ:
1227                         goto_xyz_link (view, link);
1228                         break;
1229                 case EV_LINK_TYPE_EXTERNAL_URI:
1230                 case EV_LINK_TYPE_LAUNCH:
1231                         g_signal_emit (view, signals[SIGNAL_EXTERNAL_LINK], 0, link);
1232                         break;
1233         }
1234 }
1235
1236 static char *
1237 tip_from_link (EvView *view, EvLink *link)
1238 {
1239         EvLinkType type;
1240         char *msg = NULL;
1241         char *page_label;
1242
1243         type = ev_link_get_link_type (link);
1244
1245         switch (type) {
1246                 case EV_LINK_TYPE_TITLE:
1247                         if (ev_link_get_title (link))
1248                                 msg = g_strdup (ev_link_get_title (link));
1249                         break;
1250                 case EV_LINK_TYPE_PAGE:
1251                 case EV_LINK_TYPE_PAGE_XYZ:
1252                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1253                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1254                         g_free (page_label);
1255                         break;
1256                 case EV_LINK_TYPE_EXTERNAL_URI:
1257                         msg = g_strdup (ev_link_get_uri (link));
1258                         break;
1259                 default:
1260                         break;
1261         }
1262
1263         return msg;
1264 }
1265
1266 static void
1267 handle_link_over_xy (EvView *view, gint x, gint y)
1268 {
1269         EvLink *link;
1270
1271         link = ev_view_get_link_at_location (view, x, y);
1272
1273         if (view->link_tooltip == NULL) {
1274                 view->link_tooltip = ev_tooltip_new (GTK_WIDGET (view));
1275         }
1276
1277         if (view->hovered_link != link) {
1278                 view->hovered_link = link;
1279                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1280         }
1281
1282         if (link) {
1283                 char *msg = tip_from_link (view, link);
1284
1285                 if (msg && g_utf8_validate (msg, -1, NULL)) {
1286                         EvTooltip *tooltip = EV_TOOLTIP (view->link_tooltip);
1287
1288                         ev_tooltip_set_position (tooltip, x, y);
1289                         ev_tooltip_set_text (tooltip, msg);
1290                         ev_tooltip_activate (tooltip);
1291                 }
1292                 g_free (msg);
1293
1294                 ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1295         } else if (location_in_text (view, x + view->scroll_x, y + view->scroll_y)) {
1296                 ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1297         } else {
1298                 ev_view_set_status (view, NULL);
1299                 if (view->cursor == EV_VIEW_CURSOR_LINK ||
1300                     view->cursor == EV_VIEW_CURSOR_IBEAM)
1301                         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1302         }
1303         return;
1304 }
1305
1306 /*** GtkWidget implementation ***/
1307
1308 static void
1309 ev_view_size_request_continuous_dual_page (EvView         *view,
1310                                            GtkRequisition *requisition)
1311 {
1312         int max_width;
1313         gint n_pages;
1314         GtkBorder border;
1315
1316         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1317                                      view->scale, &max_width);
1318         compute_border (view, max_width, max_width, &border);
1319
1320         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1321
1322         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1323         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1324
1325         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1326                 requisition->width = 1;
1327         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1328                 requisition->width = 1;
1329                 /* FIXME: This could actually be set on one page docs or docs
1330                  * with a strange aspect ratio. */
1331                 /* requisition->height = 1;*/
1332         }
1333 }
1334
1335 static void
1336 ev_view_size_request_continuous (EvView         *view,
1337                                  GtkRequisition *requisition)
1338 {
1339         int max_width;
1340         int n_pages;
1341         GtkBorder border;
1342
1343
1344         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1345                                      view->scale, &max_width);
1346         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1347         compute_border (view, max_width, max_width, &border);
1348
1349         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1350         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1351
1352         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1353                 requisition->width = 1;
1354         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1355                 requisition->width = 1;
1356                 /* FIXME: This could actually be set on one page docs or docs
1357                  * with a strange aspect ratio. */
1358                 /* requisition->height = 1;*/
1359         }
1360 }
1361
1362 static void
1363 ev_view_size_request_dual_page (EvView         *view,
1364                                 GtkRequisition *requisition)
1365 {
1366         GtkBorder border;
1367         gint width, height;
1368
1369         /* Find the largest of the two. */
1370         ev_page_cache_get_size (view->page_cache,
1371                                 view->current_page,
1372                                 view->rotation,
1373                                 view->scale,
1374                                 &width, &height);
1375         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1376                 gint width_2, height_2;
1377                 ev_page_cache_get_size (view->page_cache,
1378                                         view->current_page + 1,
1379                                         view->rotation,
1380                                         view->scale,
1381                                         &width_2, &height_2);
1382                 if (width_2 > width) {
1383                         width = width_2;
1384                         height = height_2;
1385                 }
1386         }
1387         compute_border (view, width, height, &border);
1388
1389         requisition->width = ((width + border.left + border.right) * 2) +
1390                 (view->spacing * 3);
1391         requisition->height = (height + border.top + border.bottom) +
1392                 (view->spacing * 2);
1393
1394         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1395                 requisition->width = 1;
1396         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1397                 requisition->width = 1;
1398                 requisition->height = 1;
1399         }
1400 }
1401
1402 static void
1403 ev_view_size_request_single_page (EvView         *view,
1404                                   GtkRequisition *requisition)
1405 {
1406         GtkBorder border;
1407         gint width, height;
1408
1409         ev_page_cache_get_size (view->page_cache,
1410                                 view->current_page,
1411                                 view->rotation,
1412                                 view->scale,
1413                                 &width, &height);
1414         compute_border (view, width, height, &border);
1415
1416         requisition->width = width + border.left + border.right + (2 * view->spacing);
1417         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1418
1419         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1420                 requisition->width = 1;
1421                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1422         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1423                 requisition->width = 1;
1424                 requisition->height = 1;
1425         }
1426 }
1427
1428 static void
1429 ev_view_size_request (GtkWidget      *widget,
1430                       GtkRequisition *requisition)
1431 {
1432         EvView *view = EV_VIEW (widget);
1433
1434         if (view->document == NULL) {
1435                 requisition->width = 1;
1436                 requisition->height = 1;
1437                 return;
1438         }
1439
1440         if (view->presentation) {
1441                 requisition->width = 1;
1442                 requisition->height = 1;
1443                 return;
1444         }
1445
1446         if (view->continuous && view->dual_page)
1447                 ev_view_size_request_continuous_dual_page (view, requisition);
1448         else if (view->continuous)
1449                 ev_view_size_request_continuous (view, requisition);
1450         else if (view->dual_page)
1451                 ev_view_size_request_dual_page (view, requisition);
1452         else
1453                 ev_view_size_request_single_page (view, requisition);
1454 }
1455
1456 static void
1457 ev_view_size_allocate (GtkWidget      *widget,
1458                        GtkAllocation  *allocation)
1459 {
1460         EvView *view = EV_VIEW (widget);
1461
1462         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1463             view->sizing_mode == EV_SIZING_BEST_FIT) {
1464
1465                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1466
1467                 ev_view_size_request (widget, &widget->requisition);
1468         }
1469
1470         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1471         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1472
1473         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1474         view->pending_resize = FALSE;
1475
1476         if (view->document)
1477                 view_update_range_and_current_page (view);
1478
1479         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1480 }
1481
1482 static void
1483 ev_view_realize (GtkWidget *widget)
1484 {
1485         EvView *view = EV_VIEW (widget);
1486         GdkWindowAttr attributes;
1487
1488         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1489
1490
1491         attributes.window_type = GDK_WINDOW_CHILD;
1492         attributes.wclass = GDK_INPUT_OUTPUT;
1493         attributes.visual = gtk_widget_get_visual (widget);
1494         attributes.colormap = gtk_widget_get_colormap (widget);
1495
1496         attributes.x = widget->allocation.x;
1497         attributes.y = widget->allocation.y;
1498         attributes.width = widget->allocation.width;
1499         attributes.height = widget->allocation.height;
1500         attributes.event_mask = GDK_EXPOSURE_MASK |
1501                                 GDK_BUTTON_PRESS_MASK |
1502                                 GDK_BUTTON_RELEASE_MASK |
1503                                 GDK_SCROLL_MASK |
1504                                 GDK_KEY_PRESS_MASK |
1505                                 GDK_POINTER_MOTION_MASK |
1506                                 GDK_POINTER_MOTION_HINT_MASK |
1507                                 GDK_ENTER_NOTIFY_MASK |
1508                                 GDK_LEAVE_NOTIFY_MASK;
1509
1510         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1511                                          &attributes,
1512                                          GDK_WA_X | GDK_WA_Y |
1513                                          GDK_WA_COLORMAP |
1514                                          GDK_WA_VISUAL);
1515         gdk_window_set_user_data (widget->window, widget);
1516         widget->style = gtk_style_attach (widget->style, widget->window);
1517
1518         if (view->presentation)
1519                 gdk_window_set_background (widget->window, &widget->style->black);
1520         else
1521                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1522 }
1523
1524 static gboolean
1525 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1526 {
1527         EvView *view = EV_VIEW (widget);
1528         guint state;
1529
1530         state = event->state & gtk_accelerator_get_default_mod_mask ();
1531
1532         if (state == GDK_CONTROL_MASK && view->presentation == FALSE) {
1533                 ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1534
1535                 if (event->direction == GDK_SCROLL_UP ||
1536                     event->direction == GDK_SCROLL_LEFT) {
1537                         if (ev_view_can_zoom_in (view)) {
1538                                 ev_view_zoom_in (view);
1539                         }
1540                 } else {
1541                         if (ev_view_can_zoom_out (view)) {
1542                                 ev_view_zoom_out (view);
1543                         }
1544                 }
1545
1546                 return TRUE;
1547         }
1548
1549         /* Shift+Wheel scrolls the in the perpendicular direction */
1550         if (state & GDK_SHIFT_MASK) {
1551                 if (event->direction == GDK_SCROLL_UP)
1552                         event->direction = GDK_SCROLL_LEFT;
1553                 if (event->direction == GDK_SCROLL_LEFT)
1554                         event->direction = GDK_SCROLL_UP;
1555                 if (event->direction == GDK_SCROLL_DOWN)
1556                         event->direction = GDK_SCROLL_RIGHT;
1557                 if (event->direction == GDK_SCROLL_RIGHT)
1558                         event->direction = GDK_SCROLL_DOWN;
1559
1560                 event->state &= ~GDK_SHIFT_MASK;
1561                 state &= ~GDK_SHIFT_MASK;
1562         }
1563
1564         if (state == 0 && view->presentation) {
1565                 switch (event->direction) {
1566                 case GDK_SCROLL_DOWN:
1567                 case GDK_SCROLL_RIGHT:
1568                         ev_view_next_page (view);
1569                         break;
1570                 case GDK_SCROLL_UP:
1571                 case GDK_SCROLL_LEFT:
1572                         ev_view_previous_page (view);
1573                         break;
1574                 }
1575
1576                 return TRUE;
1577         }
1578
1579         return FALSE;
1580 }
1581
1582 static EvViewSelection *
1583 find_selection_for_page (EvView *view,
1584                          gint    page)
1585 {
1586         GList *list;
1587
1588         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1589                 EvViewSelection *selection;
1590
1591                 selection = (EvViewSelection *) list->data;
1592
1593                 if (selection->page == page)
1594                         return selection;
1595         }
1596
1597         return NULL;
1598 }
1599
1600 static gboolean
1601 ev_view_expose_event (GtkWidget      *widget,
1602                       GdkEventExpose *event)
1603 {
1604         EvView *view = EV_VIEW (widget);
1605         int i;
1606
1607         if (view->document == NULL)
1608                 return FALSE;
1609
1610         for (i = view->start_page; i <= view->end_page; i++) {
1611                 GdkRectangle page_area;
1612                 GtkBorder border;
1613
1614                 if (!get_page_extents (view, i, &page_area, &border))
1615                         continue;
1616
1617                 page_area.x -= view->scroll_x;
1618                 page_area.y -= view->scroll_y;
1619
1620                 draw_one_page (view, i, &page_area, &border, &(event->area));
1621
1622                 if (EV_IS_DOCUMENT_FIND (view->document))
1623                         highlight_find_results (view, i);
1624         }
1625
1626         return FALSE;
1627 }
1628
1629 static gboolean
1630 ev_view_popup_menu (GtkWidget *widget)
1631 {
1632     gint x, y;
1633     EvLink *link;
1634     EvView *view = EV_VIEW (widget);
1635
1636     gtk_widget_get_pointer (widget, &x, &y);
1637     link = ev_view_get_link_at_location (view, x, y);
1638     g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1639     return TRUE;
1640 }
1641
1642 static gboolean
1643 ev_view_button_press_event (GtkWidget      *widget,
1644                             GdkEventButton *event)
1645 {
1646         EvView *view = EV_VIEW (widget);
1647         EvLink *link;
1648
1649         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1650                 gtk_widget_grab_focus (widget);
1651         }
1652
1653         view->pressed_button = event->button;
1654         view->selection_info.in_drag = FALSE;
1655
1656         switch (event->button) {
1657                 case 1:
1658                         if (view->selection_info.selections) {
1659                                 if (location_in_selected_text (view,
1660                                                                event->x + view->scroll_x,
1661                                                                event->y + view->scroll_y)) {
1662                                         view->selection_info.in_drag = TRUE;
1663                                 } else {
1664                                         clear_selection (view);
1665                                 }
1666
1667                                 gtk_widget_queue_draw (widget);
1668                         }
1669
1670                         view->selection_info.start.x = event->x + view->scroll_x;
1671                         view->selection_info.start.y = event->y + view->scroll_y;
1672
1673                         return TRUE;
1674                 case 2:
1675                         /* use root coordinates as reference point because
1676                          * scrolling changes window relative coordinates */
1677                         view->drag_info.start.x = event->x_root;
1678                         view->drag_info.start.y = event->y_root;
1679                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1680                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1681
1682                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1683
1684                         return TRUE;
1685                 case 3:
1686                         link = ev_view_get_link_at_location (view, event->x, event->y);
1687                         g_signal_emit (view, signals[SIGNAL_POPUP_MENU], 0, link);
1688                         return TRUE;
1689         }
1690
1691         return FALSE;
1692 }
1693
1694 static void
1695 ev_view_drag_data_get (GtkWidget        *widget,
1696                        GdkDragContext   *context,
1697                        GtkSelectionData *selection_data,
1698                        guint             info,
1699                        guint             time)
1700 {
1701         EvView *view = EV_VIEW (widget);
1702
1703         if (view->selection_info.selections &&
1704             ev_document_can_get_text (view->document)) {
1705                 gchar *text;
1706
1707                 text = get_selected_text (view);
1708
1709                 gtk_selection_data_set_text (selection_data, text, strlen (text));
1710
1711                 g_free (text);
1712         }
1713 }
1714
1715 static gboolean
1716 selection_update_idle_cb (EvView *view)
1717 {
1718         compute_selections (view, &view->selection_info.start, &view->motion);
1719         view->selection_update_id = 0;
1720         return FALSE;
1721 }
1722
1723 static gboolean
1724 selection_scroll_timeout_cb (EvView *view)
1725 {
1726         gint x, y, shift = 0;
1727         GtkWidget *widget = GTK_WIDGET (view);
1728
1729         gtk_widget_get_pointer (widget, &x, &y);
1730
1731         if (y > widget->allocation.height) {
1732                 shift = (y - widget->allocation.height) / 2;
1733         } else if (y < 0) {
1734                 shift = y / 2;
1735         }
1736
1737         if (shift)
1738                 gtk_adjustment_set_value (view->vadjustment,
1739                                           CLAMP (view->vadjustment->value + shift,
1740                                           view->vadjustment->lower,
1741                                           view->vadjustment->upper -
1742                                           view->vadjustment->page_size));
1743
1744         if (x > widget->allocation.width) {
1745                 shift = (x - widget->allocation.width) / 2;
1746         } else if (x < 0) {
1747                 shift = x / 2;
1748         }
1749
1750         if (shift)
1751                 gtk_adjustment_set_value (view->hadjustment,
1752                                           CLAMP (view->hadjustment->value + shift,
1753                                           view->hadjustment->lower,
1754                                           view->hadjustment->upper -
1755                                           view->hadjustment->page_size));
1756
1757         return TRUE;
1758 }
1759
1760 static gboolean
1761 ev_view_motion_notify_event (GtkWidget      *widget,
1762                              GdkEventMotion *event)
1763 {
1764         EvView *view = EV_VIEW (widget);
1765         gint x, y;
1766
1767         if (!view->document)
1768                 return FALSE;
1769
1770         if (event->is_hint || event->window != widget->window) {
1771             gtk_widget_get_pointer (widget, &x, &y);
1772         } else {
1773             x = event->x;
1774             y = event->y;
1775         }
1776
1777         if (view->selection_info.in_drag) {
1778                 if (gtk_drag_check_threshold (widget,
1779                                               view->selection_info.start.x,
1780                                               view->selection_info.start.y,
1781                                               x, y)) {
1782                         GdkDragContext *context;
1783                         GtkTargetList *target_list = gtk_target_list_new (NULL, 0);
1784
1785                         gtk_target_list_add_text_targets (target_list, 0);
1786
1787                         context = gtk_drag_begin (widget, target_list,
1788                                                   GDK_ACTION_COPY,
1789                                                   1, (GdkEvent *)event);
1790
1791                         view->selection_info.in_drag = FALSE;
1792
1793                         gtk_target_list_unref (target_list);
1794
1795                         return TRUE;
1796                 }
1797         }
1798
1799         /* For the Evince 0.4.x release, we limit selection to un-rotated
1800          * documents only.
1801          */
1802         if (view->pressed_button == 1 && view->rotation == 0) {
1803
1804                 /* Schedule timeout to scroll during selection and additionally
1805                  * scroll once to allow arbitrary speed. */
1806                 if (!view->selection_scroll_id)
1807                     view->selection_scroll_id = g_timeout_add (SCROLL_TIME, (GSourceFunc)selection_scroll_timeout_cb, view);
1808                 else
1809                     selection_scroll_timeout_cb (view);
1810
1811                 view->selection_info.in_selection = TRUE;
1812                 view->motion.x = x + view->scroll_x;
1813                 view->motion.y = y + view->scroll_y;
1814
1815                 /* Queue an idle to handle the motion.  We do this because
1816                  * handling any selection events in the motion could be slower
1817                  * than new motion events reach us.  We always put it in the
1818                  * idle to make sure we catch up and don't visibly lag the
1819                  * mouse. */
1820                 if (!view->selection_update_id)
1821                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1822
1823                 return TRUE;
1824         } else if (view->pressed_button == 2) {
1825                 if (!view->drag_info.in_drag) {
1826                         gboolean start;
1827
1828                         start = gtk_drag_check_threshold (widget,
1829                                                           view->drag_info.start.x,
1830                                                           view->drag_info.start.y,
1831                                                           event->x_root,
1832                                                           event->y_root);
1833                         view->drag_info.in_drag = start;
1834                 }
1835
1836                 if (view->drag_info.in_drag) {
1837                         int dx, dy;
1838                         gdouble dhadj_value, dvadj_value;
1839
1840                         dx = event->x_root - view->drag_info.start.x;
1841                         dy = event->y_root - view->drag_info.start.y;
1842
1843                         dhadj_value = view->hadjustment->page_size *
1844                                       (gdouble)dx / widget->allocation.width;
1845                         dvadj_value = view->vadjustment->page_size *
1846                                       (gdouble)dy / widget->allocation.height;
1847
1848                         /* clamp scrolling to visible area */
1849                         gtk_adjustment_set_value (view->hadjustment,
1850                                                   MIN(view->drag_info.hadj - dhadj_value,
1851                                                       view->hadjustment->upper -
1852                                                       view->hadjustment->page_size));
1853                         gtk_adjustment_set_value (view->vadjustment,
1854                                                   MIN(view->drag_info.vadj - dvadj_value,
1855                                                       view->vadjustment->upper -
1856                                                       view->vadjustment->page_size));
1857
1858                         return TRUE;
1859                 }
1860         /* For the Evince 0.4.x release, we limit links to un-rotated documents
1861          * only.
1862          */
1863         } else if (view->pressed_button <= 0 &&
1864                    view->rotation == 0) {
1865                 handle_link_over_xy (view, x, y);
1866                 return TRUE;
1867         }
1868
1869         return FALSE;
1870 }
1871
1872 static gboolean
1873 ev_view_button_release_event (GtkWidget      *widget,
1874                               GdkEventButton *event)
1875 {
1876         EvView *view = EV_VIEW (widget);
1877         EvLink *link;
1878
1879         if (view->pressed_button == 2) {
1880                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1881         }
1882
1883         if (view->document) {
1884                 link = ev_view_get_link_at_location (view, event->x, event->y);
1885         } else {
1886                 link = NULL;
1887         }
1888
1889         view->pressed_button = -1;
1890         view->drag_info.in_drag = FALSE;
1891
1892         if (view->selection_scroll_id) {
1893             g_source_remove (view->selection_scroll_id);
1894             view->selection_scroll_id = 0;
1895         }
1896         if (view->selection_update_id) {
1897             g_source_remove (view->selection_update_id);
1898             view->selection_update_id = 0;
1899         }
1900
1901         if (view->selection_info.selections) {
1902                 ev_view_update_primary_selection (view);
1903
1904                 if (view->selection_info.in_drag) {
1905                         clear_selection (view);
1906                         gtk_widget_queue_draw (widget);
1907                 }
1908
1909                 view->selection_info.in_drag = FALSE;
1910         } else if (link) {
1911                 ev_view_goto_link (view, link);
1912         } else if (view->presentation) {
1913                 switch (event->button) {
1914                 case 1:
1915                         ev_view_next_page (view);
1916                         return TRUE;
1917                 case 3:
1918                         ev_view_previous_page (view);
1919                         return TRUE;
1920                 }
1921         }
1922
1923         return FALSE;
1924 }
1925
1926 static gint
1927 ev_view_focus_in (GtkWidget     *widget,
1928                   GdkEventFocus *event)
1929 {
1930         if (EV_VIEW (widget)->pixbuf_cache)
1931                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1932         gtk_widget_queue_draw (widget);
1933
1934         return FALSE;
1935 }
1936
1937 static gint
1938 ev_view_focus_out (GtkWidget     *widget,
1939                      GdkEventFocus *event)
1940 {
1941         if (EV_VIEW (widget)->pixbuf_cache)
1942                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1943         gtk_widget_queue_draw (widget);
1944
1945         return FALSE;
1946 }
1947
1948 static gboolean
1949 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1950 {
1951         EvView *view = EV_VIEW (widget);
1952
1953         ev_view_set_status (view, NULL);
1954
1955         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1956             view->cursor == EV_VIEW_CURSOR_IBEAM)
1957                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1958
1959         if (view->link_tooltip) {
1960                 view->hovered_link = NULL;
1961                 ev_tooltip_deactivate (EV_TOOLTIP (view->link_tooltip));
1962         }
1963
1964         return FALSE;
1965 }
1966
1967 static gboolean
1968 ev_view_enter_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1969 {
1970         EvView *view = EV_VIEW (widget);
1971
1972         handle_link_over_xy (view, event->x, event->y);
1973
1974         return FALSE;
1975 }
1976
1977 static void
1978 ev_view_style_set (GtkWidget *widget,
1979                    GtkStyle  *old_style)
1980 {
1981         if (EV_VIEW (widget)->pixbuf_cache)
1982                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1983
1984         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
1985 }
1986
1987 /*** Drawing ***/
1988
1989 static guint32
1990 ev_gdk_color_to_rgb (const GdkColor *color)
1991 {
1992   guint32 result;
1993   result = (0xff0000 | (color->red & 0xff00));
1994   result <<= 8;
1995   result |= ((color->green & 0xff00) | (color->blue >> 8));
1996   return result;
1997 }
1998
1999 static void
2000 draw_rubberband (GtkWidget *widget, GdkWindow *window,
2001                  const GdkRectangle *rect, guchar alpha)
2002 {
2003         GdkGC *gc;
2004         GdkPixbuf *pixbuf;
2005         GdkColor *fill_color_gdk;
2006         guint fill_color;
2007
2008         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
2009         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
2010
2011         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
2012                                  rect->width, rect->height);
2013         gdk_pixbuf_fill (pixbuf, fill_color);
2014
2015         gdk_draw_pixbuf (window, NULL, pixbuf,
2016                          0, 0,
2017                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2018                          rect->width, rect->height,
2019                          GDK_RGB_DITHER_NONE,
2020                          0, 0);
2021
2022         g_object_unref (pixbuf);
2023
2024         gc = gdk_gc_new (window);
2025         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
2026         gdk_draw_rectangle (window, gc, FALSE,
2027                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
2028                             rect->width - 1,
2029                             rect->height - 1);
2030         g_object_unref (gc);
2031
2032         gdk_color_free (fill_color_gdk);
2033 }
2034
2035
2036 static void
2037 highlight_find_results (EvView *view, int page)
2038 {
2039         EvDocumentFind *find;
2040         int i, results = 0;
2041
2042         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
2043
2044         find = EV_DOCUMENT_FIND (view->document);
2045
2046         results = ev_document_find_get_n_results (find, page);
2047
2048         for (i = 0; i < results; i++) {
2049                 EvRectangle rectangle;
2050                 GdkRectangle view_rectangle;
2051                 guchar alpha;
2052
2053                 if (i == view->find_result && page == view->find_page) {
2054                         alpha = 0x90;
2055                 } else {
2056                         alpha = 0x20;
2057                 }
2058
2059                 ev_document_find_get_result (find, page, i, &rectangle);
2060                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
2061                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
2062                                  &view_rectangle, alpha);
2063         }
2064 }
2065
2066 static void
2067 draw_loading_text (EvView       *view,
2068                    GdkRectangle *page_area,
2069                    GdkRectangle *expose_area)
2070 {
2071         PangoLayout *layout;
2072         PangoFontDescription *font_desc;
2073         PangoRectangle logical_rect;
2074         double real_scale;
2075         int target_width;
2076
2077         const char *loading_text = _("Loading...");
2078
2079         layout = gtk_widget_create_pango_layout (GTK_WIDGET (view), loading_text);
2080
2081         font_desc = pango_font_description_new ();
2082
2083
2084         /* We set the font to be 10 points, get the size, and scale appropriately */
2085         pango_font_description_set_size (font_desc, 10 * PANGO_SCALE);
2086         pango_layout_set_font_description (layout, font_desc);
2087         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2088
2089         /* Make sure we fit the middle of the page */
2090         target_width = MAX (page_area->width / 2, 1);
2091         real_scale = ((double)target_width / (double) logical_rect.width) * (PANGO_SCALE * 10);
2092         pango_font_description_set_size (font_desc, (int)real_scale);
2093         pango_layout_set_font_description (layout, font_desc);
2094         pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
2095
2096         gtk_paint_layout (GTK_WIDGET (view)->style,
2097                           GTK_WIDGET (view)->window,
2098                           GTK_WIDGET_STATE (view),
2099                           FALSE,
2100                           page_area,
2101                           GTK_WIDGET (view),
2102                           NULL,
2103                           page_area->x + (target_width/2),
2104                           page_area->y + (page_area->height - logical_rect.height) / 2,
2105                           layout);
2106
2107         pango_font_description_free (font_desc);
2108         g_object_unref (layout);
2109 }
2110
2111 static void
2112 draw_one_page (EvView          *view,
2113                gint             page,
2114                GdkRectangle    *page_area,
2115                GtkBorder       *border,
2116                GdkRectangle    *expose_area)
2117 {
2118         gint width, height;
2119         GdkPixbuf *current_pixbuf;
2120         GdkRectangle overlap;
2121         GdkRectangle real_page_area;
2122         EvViewSelection *selection;
2123
2124         g_assert (view->document);
2125         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
2126                 return;
2127
2128         selection = find_selection_for_page (view, page);
2129         ev_page_cache_get_size (view->page_cache,
2130                                 page, view->rotation,
2131                                 view->scale,
2132                                 &width, &height);
2133         /* Render the document itself */
2134         real_page_area = *page_area;
2135
2136         real_page_area.x += border->left;
2137         real_page_area.y += border->top;
2138         real_page_area.width -= (border->left + border->right);
2139         real_page_area.height -= (border->top + border->bottom);
2140
2141         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
2142                                          GTK_WIDGET (view),
2143                                          page_area, border);
2144
2145         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
2146                 GdkPixbuf *selection_pixbuf = NULL;
2147                 GdkPixbuf *scaled_image;
2148                 GdkPixbuf *scaled_selection;
2149
2150                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
2151
2152                 /* Get the selection pixbuf iff we have something to draw */
2153                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
2154                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
2155                                                                                  page,
2156                                                                                  view->scale,
2157                                                                                  NULL);
2158
2159                 if (current_pixbuf == NULL)
2160                         scaled_image = NULL;
2161                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
2162                          height == gdk_pixbuf_get_height (current_pixbuf))
2163                         scaled_image = g_object_ref (current_pixbuf);
2164                 else
2165                         /* FIXME: We don't want to scale the whole area, just the right
2166                          * area of it */
2167                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
2168                                                                 width, height,
2169                                                                 GDK_INTERP_NEAREST);
2170
2171                 if (selection_pixbuf == NULL)
2172                         scaled_selection = NULL;
2173                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
2174                          height == gdk_pixbuf_get_height (selection_pixbuf))
2175                         scaled_selection = g_object_ref (selection_pixbuf);
2176                 else
2177                         /* FIXME: We don't want to scale the whole area, just the right
2178                          * area of it */
2179                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
2180                                                                     width, height,
2181                                                                     GDK_INTERP_NEAREST);
2182
2183                 if (scaled_image) {
2184                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2185                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2186                                          scaled_image,
2187                                          overlap.x - real_page_area.x,
2188                                          overlap.y - real_page_area.y,
2189                                          overlap.x, overlap.y,
2190                                          overlap.width, overlap.height,
2191                                          GDK_RGB_DITHER_NORMAL,
2192                                          0, 0);
2193                         g_object_unref (scaled_image);
2194                 } else {
2195                         draw_loading_text (view,
2196                                            &real_page_area,
2197                                            expose_area);
2198                 }
2199
2200                 if (scaled_selection) {
2201                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
2202                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
2203                                          scaled_selection,
2204                                          overlap.x - real_page_area.x,
2205                                          overlap.y - real_page_area.y,
2206                                          overlap.x, overlap.y,
2207                                          overlap.width, overlap.height,
2208                                          GDK_RGB_DITHER_NORMAL,
2209                                          0, 0);
2210                         g_object_unref (scaled_selection);
2211                 }
2212         }
2213 }
2214
2215 /*** GObject functions ***/
2216
2217 static void
2218 ev_view_finalize (GObject *object)
2219 {
2220         EvView *view = EV_VIEW (object);
2221
2222         LOG ("Finalize");
2223
2224         g_free (view->status);
2225         g_free (view->find_status);
2226
2227         clear_selection (view);
2228
2229         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
2230 }
2231
2232 static void
2233 ev_view_destroy (GtkObject *object)
2234 {
2235         EvView *view = EV_VIEW (object);
2236
2237         if (view->document) {
2238                 g_object_unref (view->document);
2239                 view->document = NULL;
2240         }
2241
2242         if (view->pixbuf_cache) {
2243                 g_object_unref (view->pixbuf_cache);
2244                 view->pixbuf_cache = NULL;
2245         }
2246
2247         if (view->link_tooltip) {
2248                 gtk_widget_destroy (view->link_tooltip);
2249         }
2250
2251         if (view->selection_scroll_id) {
2252             g_source_remove (view->selection_scroll_id);
2253             view->selection_scroll_id = 0;
2254         }
2255
2256         if (view->selection_update_id) {
2257             g_source_remove (view->selection_update_id);
2258             view->selection_update_id = 0;
2259         }
2260
2261         ev_view_set_scroll_adjustments (view, NULL, NULL);
2262
2263         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
2264 }
2265
2266 static void
2267 ev_view_set_property (GObject      *object,
2268                       guint         prop_id,
2269                       const GValue *value,
2270                       GParamSpec   *pspec)
2271 {
2272         EvView *view = EV_VIEW (object);
2273
2274         switch (prop_id)
2275         {
2276         case PROP_CONTINUOUS:
2277                 ev_view_set_continuous (view, g_value_get_boolean (value));
2278                 break;
2279         case PROP_DUAL_PAGE:
2280                 ev_view_set_dual_page (view, g_value_get_boolean (value));
2281                 break;
2282         case PROP_FULLSCREEN:
2283                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
2284                 break;
2285         case PROP_PRESENTATION:
2286                 ev_view_set_presentation (view, g_value_get_boolean (value));
2287                 break;
2288         case PROP_SIZING_MODE:
2289                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
2290                 break;
2291         case PROP_ZOOM:
2292                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
2293                 break;
2294         case PROP_ROTATION:
2295                 ev_view_set_rotation (view, g_value_get_int (value));
2296                 break;
2297         default:
2298                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2299         }
2300 }
2301
2302 static AtkObject *
2303 ev_view_get_accessible (GtkWidget *widget)
2304 {
2305         static gboolean first_time = TRUE;
2306
2307         if (first_time) {
2308                 AtkObjectFactory *factory;
2309                 AtkRegistry *registry;
2310                 GType derived_type;
2311                 GType derived_atk_type;
2312
2313                 /*
2314                  * Figure out whether accessibility is enabled by looking at the
2315                  * type of the accessible object which would be created for
2316                  * the parent type of EvView.
2317                  */
2318                 derived_type = g_type_parent (EV_TYPE_VIEW);
2319
2320                 registry = atk_get_default_registry ();
2321                 factory = atk_registry_get_factory (registry,
2322                                                     derived_type);
2323                 derived_atk_type = atk_object_factory_get_accessible_type (factory);
2324                 if (g_type_is_a (derived_atk_type, GTK_TYPE_ACCESSIBLE))
2325                         atk_registry_set_factory_type (registry,
2326                                                        EV_TYPE_VIEW,
2327                                                        ev_view_accessible_factory_get_type ());
2328                 first_time = FALSE;
2329         }
2330         return GTK_WIDGET_CLASS (ev_view_parent_class)->get_accessible (widget);
2331 }
2332
2333 static void
2334 ev_view_get_property (GObject *object,
2335                       guint prop_id,
2336                       GValue *value,
2337                       GParamSpec *pspec)
2338 {
2339         EvView *view = EV_VIEW (object);
2340
2341         switch (prop_id)
2342         {
2343         case PROP_STATUS:
2344                 g_value_set_string (value, view->status);
2345                 break;
2346         case PROP_FIND_STATUS:
2347                 g_value_set_string (value, view->status);
2348                 break;
2349         case PROP_CONTINUOUS:
2350                 g_value_set_boolean (value, view->continuous);
2351                 break;
2352         case PROP_DUAL_PAGE:
2353                 g_value_set_boolean (value, view->dual_page);
2354                 break;
2355         case PROP_FULLSCREEN:
2356                 g_value_set_boolean (value, view->fullscreen);
2357                 break;
2358         case PROP_PRESENTATION:
2359                 g_value_set_boolean (value, view->presentation);
2360                 break;
2361         case PROP_SIZING_MODE:
2362                 g_value_set_enum (value, view->sizing_mode);
2363                 break;
2364         case PROP_ZOOM:
2365                 g_value_set_double (value, view->scale);
2366                 break;
2367         case PROP_ROTATION:
2368                 g_value_set_int (value, view->rotation);
2369                 break;
2370         case PROP_HAS_SELECTION:
2371                 g_value_set_boolean (value,
2372                                      view->selection_info.selections != NULL);
2373                 break;
2374         default:
2375                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
2376         }
2377 }
2378
2379 static void
2380 ev_view_class_init (EvViewClass *class)
2381 {
2382         GObjectClass *object_class = G_OBJECT_CLASS (class);
2383         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
2384         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
2385         GtkBindingSet *binding_set;
2386
2387         object_class->finalize = ev_view_finalize;
2388         object_class->set_property = ev_view_set_property;
2389         object_class->get_property = ev_view_get_property;
2390
2391         widget_class->expose_event = ev_view_expose_event;
2392         widget_class->button_press_event = ev_view_button_press_event;
2393         widget_class->motion_notify_event = ev_view_motion_notify_event;
2394         widget_class->button_release_event = ev_view_button_release_event;
2395         widget_class->focus_in_event = ev_view_focus_in;
2396         widget_class->focus_out_event = ev_view_focus_out;
2397         widget_class->get_accessible = ev_view_get_accessible;
2398         widget_class->size_request = ev_view_size_request;
2399         widget_class->size_allocate = ev_view_size_allocate;
2400         widget_class->realize = ev_view_realize;
2401         widget_class->scroll_event = ev_view_scroll_event;
2402         widget_class->enter_notify_event = ev_view_enter_notify_event;
2403         widget_class->leave_notify_event = ev_view_leave_notify_event;
2404         widget_class->style_set = ev_view_style_set;
2405         widget_class->drag_data_get = ev_view_drag_data_get;
2406         widget_class->popup_menu = ev_view_popup_menu;
2407         gtk_object_class->destroy = ev_view_destroy;
2408
2409         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
2410         class->binding_activated = ev_view_binding_activated;
2411
2412         widget_class->set_scroll_adjustments_signal =
2413             g_signal_new ("set-scroll-adjustments",
2414                           G_OBJECT_CLASS_TYPE (object_class),
2415                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2416                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
2417                           NULL, NULL,
2418                           ev_marshal_VOID__OBJECT_OBJECT,
2419                           G_TYPE_NONE, 2,
2420                           GTK_TYPE_ADJUSTMENT,
2421                           GTK_TYPE_ADJUSTMENT);
2422
2423         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
2424                          G_TYPE_FROM_CLASS (object_class),
2425                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2426                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
2427                          NULL, NULL,
2428                          ev_marshal_VOID__ENUM_BOOLEAN,
2429                          G_TYPE_NONE, 2,
2430                          GTK_TYPE_SCROLL_TYPE,
2431                          G_TYPE_BOOLEAN);
2432
2433         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
2434                          G_TYPE_FROM_CLASS (object_class),
2435                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2436                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
2437                          NULL, NULL,
2438                          ev_marshal_VOID__VOID,
2439                          G_TYPE_NONE, 0, G_TYPE_NONE);
2440         signals[SIGNAL_EXTERNAL_LINK] = g_signal_new ("external-link",
2441                          G_TYPE_FROM_CLASS (object_class),
2442                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2443                          G_STRUCT_OFFSET (EvViewClass, external_link),
2444                          NULL, NULL,
2445                          g_cclosure_marshal_VOID__OBJECT,
2446                          G_TYPE_NONE, 1,
2447                          G_TYPE_OBJECT);
2448         signals[SIGNAL_POPUP_MENU] = g_signal_new ("popup",
2449                          G_TYPE_FROM_CLASS (object_class),
2450                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
2451                          G_STRUCT_OFFSET (EvViewClass, popup_menu),
2452                          NULL, NULL,
2453                          g_cclosure_marshal_VOID__OBJECT,
2454                          G_TYPE_NONE, 1,
2455                          G_TYPE_OBJECT);
2456
2457         g_object_class_install_property (object_class,
2458                                          PROP_STATUS,
2459                                          g_param_spec_string ("status",
2460                                                               "Status Message",
2461                                                               "The status message",
2462                                                               NULL,
2463                                                               G_PARAM_READABLE));
2464
2465         g_object_class_install_property (object_class,
2466                                          PROP_FIND_STATUS,
2467                                          g_param_spec_string ("find-status",
2468                                                               "Find Status Message",
2469                                                               "The find status message",
2470                                                               NULL,
2471                                                               G_PARAM_READABLE));
2472
2473         g_object_class_install_property (object_class,
2474                                          PROP_CONTINUOUS,
2475                                          g_param_spec_boolean ("continuous",
2476                                                                "Continuous",
2477                                                                "Continuous scrolling mode",
2478                                                                TRUE,
2479                                                                G_PARAM_READWRITE));
2480
2481         g_object_class_install_property (object_class,
2482                                          PROP_DUAL_PAGE,
2483                                          g_param_spec_boolean ("dual-page",
2484                                                                "Dual Page",
2485                                                                "Two pages visible at once",
2486                                                                FALSE,
2487                                                                G_PARAM_READWRITE));
2488         g_object_class_install_property (object_class,
2489                                          PROP_FULLSCREEN,
2490                                          g_param_spec_boolean ("fullscreen",
2491                                                                "Full Screen",
2492                                                                "Draw page in a fullscreen fashion",
2493                                                                FALSE,
2494                                                                G_PARAM_READWRITE));
2495         g_object_class_install_property (object_class,
2496                                          PROP_PRESENTATION,
2497                                          g_param_spec_boolean ("presentation",
2498                                                                "Presentation",
2499                                                                "Draw page in presentation mode",
2500                                                                TRUE,
2501                                                                G_PARAM_READWRITE));
2502
2503         g_object_class_install_property (object_class,
2504                                          PROP_SIZING_MODE,
2505                                          g_param_spec_enum ("sizing-mode",
2506                                                             "Sizing Mode",
2507                                                             "Sizing Mode",
2508                                                             EV_TYPE_SIZING_MODE,
2509                                                             EV_SIZING_FIT_WIDTH,
2510                                                             G_PARAM_READWRITE));
2511
2512         g_object_class_install_property (object_class,
2513                                          PROP_ZOOM,
2514                                          g_param_spec_double ("zoom",
2515                                                               "Zoom factor",
2516                                                                "Zoom factor",
2517                                                                MIN_SCALE,
2518                                                                MAX_SCALE,
2519                                                                1.0,
2520                                                                G_PARAM_READWRITE));
2521         g_object_class_install_property (object_class,
2522                                          PROP_ROTATION,
2523                                          g_param_spec_double ("rotation",
2524                                                               "Rotation",
2525                                                                "Rotation",
2526                                                                0,
2527                                                                360,
2528                                                                0,
2529                                                                G_PARAM_READWRITE));
2530         g_object_class_install_property (object_class,
2531                                          PROP_HAS_SELECTION,
2532                                          g_param_spec_boolean ("has-selection",
2533                                                                "Has selection",
2534                                                                "The view has selections",
2535                                                                FALSE,
2536                                                                G_PARAM_READABLE));
2537
2538         binding_set = gtk_binding_set_by_class (class);
2539
2540         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
2541         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
2542         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
2543         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
2544 }
2545
2546 static void
2547 ev_view_init (EvView *view)
2548 {
2549         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2550
2551         view->spacing = 5;
2552         view->scale = 1.0;
2553         view->current_page = 0;
2554         view->pressed_button = -1;
2555         view->cursor = EV_VIEW_CURSOR_NORMAL;
2556         view->drag_info.in_drag = FALSE;
2557         view->selection_info.selections = NULL;
2558         view->selection_info.in_selection = FALSE;
2559         view->selection_info.in_drag = FALSE;
2560         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2561         view->continuous = TRUE;
2562         view->dual_page = FALSE;
2563         view->presentation = FALSE;
2564         view->fullscreen = FALSE;
2565         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2566         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2567 }
2568
2569 /*** Callbacks ***/
2570
2571 static void
2572 find_changed_cb (EvDocument *document, int page, EvView *view)
2573 {
2574         jump_to_find_page (view, EV_VIEW_FIND_NEXT);
2575         jump_to_find_result (view);
2576         update_find_status_message (view);
2577
2578         if (view->current_page == page)
2579                 gtk_widget_queue_draw (GTK_WIDGET (view));
2580 }
2581
2582 static void
2583 job_finished_cb (EvPixbufCache *pixbuf_cache,
2584                  EvView        *view)
2585 {
2586         gtk_widget_queue_draw (GTK_WIDGET (view));
2587 }
2588
2589 static void
2590 page_changed_cb (EvPageCache *page_cache,
2591                  int          new_page,
2592                  EvView      *view)
2593 {
2594         if (view->current_page != new_page) {
2595
2596                 view->current_page = new_page;
2597                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2598                 gtk_widget_queue_resize (GTK_WIDGET (view));
2599
2600                 if (EV_IS_DOCUMENT_FIND (view->document)) {
2601                         view->find_page = new_page;
2602                         view->find_result = 0;
2603                         update_find_status_message (view);
2604                 }
2605         }
2606 }
2607
2608 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2609                                          EvView *view)
2610 {
2611         int dx = 0, dy = 0;
2612
2613         if (! GTK_WIDGET_REALIZED (view))
2614                 return;
2615
2616         if (view->hadjustment) {
2617                 dx = view->scroll_x - (int) view->hadjustment->value;
2618                 view->scroll_x = (int) view->hadjustment->value;
2619         } else {
2620                 view->scroll_x = 0;
2621         }
2622
2623         if (view->vadjustment) {
2624                 dy = view->scroll_y - (int) view->vadjustment->value;
2625                 view->scroll_y = (int) view->vadjustment->value;
2626         } else {
2627                 view->scroll_y = 0;
2628         }
2629
2630
2631         if (view->pending_resize)
2632                 gtk_widget_queue_draw (GTK_WIDGET (view));
2633         else
2634                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2635
2636
2637         if (view->document)
2638                 view_update_range_and_current_page (view);
2639 }
2640
2641 GtkWidget*
2642 ev_view_new (void)
2643 {
2644         GtkWidget *view;
2645
2646         view = g_object_new (EV_TYPE_VIEW, NULL);
2647
2648         return view;
2649 }
2650
2651 static void
2652 setup_caches (EvView *view)
2653 {
2654         view->page_cache = ev_page_cache_get (view->document);
2655         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2656         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2657         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2658 }
2659
2660 static void
2661 clear_caches (EvView *view)
2662 {
2663         if (view->pixbuf_cache) {
2664                 g_object_unref (view->pixbuf_cache);
2665                 view->pixbuf_cache = NULL;
2666         }
2667
2668         if (view->page_cache) {
2669                 view->page_cache = NULL;
2670         }
2671 }
2672
2673 void
2674 ev_view_set_document (EvView     *view,
2675                       EvDocument *document)
2676 {
2677         g_return_if_fail (EV_IS_VIEW (view));
2678
2679         if (document != view->document) {
2680                 clear_caches (view);
2681
2682                 if (view->document) {
2683                         g_signal_handlers_disconnect_by_func (view->document,
2684                                                               find_changed_cb,
2685                                                               view);
2686                         g_object_unref (view->document);
2687                         view->page_cache = NULL;
2688
2689                 }
2690
2691                 view->document = document;
2692                 view->find_page = 0;
2693                 view->find_result = 0;
2694
2695                 if (view->document) {
2696                         g_object_ref (view->document);
2697                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2698                                 g_signal_connect (view->document,
2699                                                   "find_changed",
2700                                                   G_CALLBACK (find_changed_cb),
2701                                                   view);
2702                         }
2703
2704                         setup_caches (view);
2705                 }
2706
2707                 gtk_widget_queue_resize (GTK_WIDGET (view));
2708         }
2709 }
2710
2711 /*** Zoom and sizing mode ***/
2712
2713 #define EPSILON 0.0000001
2714 void
2715 ev_view_set_zoom (EvView   *view,
2716                   double    factor,
2717                   gboolean  relative)
2718 {
2719         double scale;
2720
2721         if (relative)
2722                 scale = view->scale * factor;
2723         else
2724                 scale = factor;
2725
2726         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2727
2728         if (ABS (view->scale - scale) < EPSILON)
2729                 return;
2730
2731         view->scale = scale;
2732         view->pending_resize = TRUE;
2733
2734         gtk_widget_queue_resize (GTK_WIDGET (view));
2735
2736         g_object_notify (G_OBJECT (view), "zoom");
2737 }
2738
2739 double
2740 ev_view_get_zoom (EvView *view)
2741 {
2742         return view->scale;
2743 }
2744
2745 gboolean
2746 ev_view_get_continuous (EvView *view)
2747 {
2748         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2749
2750         return view->continuous;
2751 }
2752
2753 void
2754 ev_view_set_continuous (EvView   *view,
2755                         gboolean  continuous)
2756 {
2757         g_return_if_fail (EV_IS_VIEW (view));
2758
2759         continuous = continuous != FALSE;
2760
2761         if (view->continuous != continuous) {
2762                 view->continuous = continuous;
2763                 view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2764                 gtk_widget_queue_resize (GTK_WIDGET (view));
2765         }
2766
2767         g_object_notify (G_OBJECT (view), "continuous");
2768 }
2769
2770 gboolean
2771 ev_view_get_dual_page (EvView *view)
2772 {
2773         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2774
2775         return view->dual_page;
2776 }
2777
2778 void
2779 ev_view_set_dual_page (EvView   *view,
2780                        gboolean  dual_page)
2781 {
2782         g_return_if_fail (EV_IS_VIEW (view));
2783
2784         dual_page = dual_page != FALSE;
2785
2786         if (view->dual_page == dual_page)
2787                 return;
2788
2789         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2790         view->dual_page = dual_page;
2791         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2792          * preload_cache_size to be 2 if dual_page is set.
2793          */
2794         gtk_widget_queue_resize (GTK_WIDGET (view));
2795
2796         g_object_notify (G_OBJECT (view), "dual-page");
2797 }
2798
2799 void
2800 ev_view_set_fullscreen (EvView   *view,
2801                          gboolean  fullscreen)
2802 {
2803         g_return_if_fail (EV_IS_VIEW (view));
2804
2805         fullscreen = fullscreen != FALSE;
2806
2807         if (view->fullscreen == fullscreen)
2808                 return;
2809
2810         view->fullscreen = fullscreen;
2811         gtk_widget_queue_resize (GTK_WIDGET (view));
2812
2813         g_object_notify (G_OBJECT (view), "fullscreen");
2814 }
2815
2816 gboolean
2817 ev_view_get_fullscreen (EvView *view)
2818 {
2819         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2820
2821         return view->fullscreen;
2822 }
2823
2824 void
2825 ev_view_set_presentation (EvView   *view,
2826                           gboolean  presentation)
2827 {
2828         g_return_if_fail (EV_IS_VIEW (view));
2829
2830         presentation = presentation != FALSE;
2831
2832         if (view->presentation == presentation)
2833                 return;
2834
2835         view->presentation = presentation;
2836         view->pending_scroll = SCROLL_TO_PAGE_POSITION;
2837         gtk_widget_queue_resize (GTK_WIDGET (view));
2838
2839         if (GTK_WIDGET_REALIZED (view)) {
2840                 if (view->presentation)
2841                         gdk_window_set_background (GTK_WIDGET(view)->window,
2842                                                    &GTK_WIDGET (view)->style->black);
2843                 else
2844                         gdk_window_set_background (GTK_WIDGET(view)->window,
2845                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2846         }
2847
2848
2849         g_object_notify (G_OBJECT (view), "presentation");
2850 }
2851
2852 gboolean
2853 ev_view_get_presentation (EvView *view)
2854 {
2855         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2856
2857         return view->presentation;
2858 }
2859
2860 void
2861 ev_view_set_sizing_mode (EvView       *view,
2862                          EvSizingMode  sizing_mode)
2863 {
2864         g_return_if_fail (EV_IS_VIEW (view));
2865
2866         if (view->sizing_mode == sizing_mode)
2867                 return;
2868
2869         view->sizing_mode = sizing_mode;
2870         gtk_widget_queue_resize (GTK_WIDGET (view));
2871
2872         g_object_notify (G_OBJECT (view), "sizing-mode");
2873 }
2874
2875 EvSizingMode
2876 ev_view_get_sizing_mode (EvView *view)
2877 {
2878         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2879
2880         return view->sizing_mode;
2881 }
2882
2883 gboolean
2884 ev_view_can_zoom_in (EvView *view)
2885 {
2886         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2887 }
2888
2889 gboolean
2890 ev_view_can_zoom_out (EvView *view)
2891 {
2892         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2893 }
2894
2895 void
2896 ev_view_zoom_in (EvView *view)
2897 {
2898         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2899
2900         view->pending_scroll = SCROLL_TO_CENTER;
2901         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2902 }
2903
2904 void
2905 ev_view_zoom_out (EvView *view)
2906 {
2907         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2908
2909         view->pending_scroll = SCROLL_TO_CENTER;
2910         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2911 }
2912
2913 void
2914 ev_view_rotate_right (EvView *view)
2915 {
2916         int rotation = view->rotation + 90;
2917
2918         if (rotation >= 360) {
2919                 rotation -= 360;
2920         }
2921
2922         ev_view_set_rotation (view, rotation);
2923 }
2924
2925 void
2926 ev_view_rotate_left (EvView *view)
2927 {
2928         int rotation = view->rotation - 90;
2929
2930         if (rotation < 0) {
2931                 rotation += 360;
2932         }
2933
2934         ev_view_set_rotation (view, rotation);
2935 }
2936
2937 void
2938 ev_view_set_rotation (EvView *view, int rotation)
2939 {
2940         view->rotation = rotation;
2941
2942         if (view->pixbuf_cache) {
2943                 ev_pixbuf_cache_clear (view->pixbuf_cache);
2944                 gtk_widget_queue_resize (GTK_WIDGET (view));
2945         }
2946
2947         if (rotation != 0)
2948                 clear_selection (view);
2949
2950         g_object_notify (G_OBJECT (view), "rotation");
2951 }
2952
2953 int
2954 ev_view_get_rotation (EvView *view)
2955 {
2956         return view->rotation;
2957 }
2958
2959 static double
2960 zoom_for_size_fit_width (int doc_width,
2961                          int doc_height,
2962                          int target_width,
2963                          int target_height,
2964                          int vsb_width)
2965 {
2966         double scale;
2967
2968         scale = (double)target_width / doc_width;
2969
2970         if (doc_height * scale > target_height)
2971                 scale = (double) (target_width - vsb_width) / doc_width;
2972
2973         return scale;
2974 }
2975
2976 static double
2977 zoom_for_size_fit_height (int doc_width,
2978                           int doc_height,
2979                           int target_width,
2980                           int target_height,
2981                           int vsb_height)
2982 {
2983         double scale;
2984
2985         scale = (double)target_height / doc_height;
2986
2987         if (doc_width * scale > target_width)
2988                 scale = (double) (target_height - vsb_height) / doc_height;
2989
2990         return scale;
2991 }
2992
2993 static double
2994 zoom_for_size_best_fit (int doc_width,
2995                         int doc_height,
2996                         int target_width,
2997                         int target_height,
2998                         int vsb_width,
2999                         int hsb_width)
3000 {
3001         double w_scale;
3002         double h_scale;
3003
3004         w_scale = (double)target_width / doc_width;
3005         h_scale = (double)target_height / doc_height;
3006
3007         if (doc_height * w_scale > target_height)
3008                 w_scale = (double) (target_width - vsb_width) / doc_width;
3009         if (doc_width * h_scale > target_width)
3010                 h_scale = (double) (target_height - hsb_width) / doc_height;
3011
3012         return MIN (w_scale, h_scale);
3013 }
3014
3015
3016 static void
3017 ev_view_zoom_for_size_presentation (EvView *view,
3018                                     int     width,
3019                                     int     height)
3020 {
3021         int doc_width, doc_height;
3022         gdouble scale;
3023
3024         ev_page_cache_get_size (view->page_cache,
3025                                 view->current_page,
3026                                 view->rotation,
3027                                 1.0,
3028                                 &doc_width,
3029                                 &doc_height);
3030         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
3031         ev_view_set_zoom (view, scale, FALSE);
3032 }
3033
3034 static void
3035 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
3036                            int     width,
3037                            int     height,
3038                            int     vsb_width,
3039                            int     hsb_height)
3040 {
3041         int doc_width, doc_height;
3042         GtkBorder border;
3043         gdouble scale;
3044
3045         ev_page_cache_get_max_width (view->page_cache,
3046                                      view->rotation,
3047                                      1.0,
3048                                      &doc_width);
3049         ev_page_cache_get_max_height (view->page_cache,
3050                                       view->rotation,
3051                                       1.0,
3052                                       &doc_height);
3053         compute_border (view, doc_width, doc_height, &border);
3054
3055         doc_width = doc_width * 2;
3056         width -= (2 * (border.left + border.right) + 3 * view->spacing);
3057         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3058
3059         /* FIXME: We really need to calculate the overall height here, not the
3060          * page height.  We assume there's always a vertical scrollbar for
3061          * now.  We need to fix this. */
3062         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3063                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3064         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3065                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3066         else
3067                 g_assert_not_reached ();
3068
3069         ev_view_set_zoom (view, scale, FALSE);
3070 }
3071
3072 static void
3073 ev_view_zoom_for_size_continuous (EvView *view,
3074                                   int     width,
3075                                   int     height,
3076                                   int     vsb_width,
3077                                   int     hsb_height)
3078 {
3079         int doc_width, doc_height;
3080         GtkBorder border;
3081         gdouble scale;
3082
3083         ev_page_cache_get_max_width (view->page_cache,
3084                                      view->rotation,
3085                                      1.0,
3086                                      &doc_width);
3087         ev_page_cache_get_max_height (view->page_cache,
3088                                       view->rotation,
3089                                       1.0,
3090                                       &doc_height);
3091         compute_border (view, doc_width, doc_height, &border);
3092
3093         width -= (border.left + border.right + 2 * view->spacing);
3094         height -= (border.top + border.bottom + 2 * view->spacing - 1);
3095
3096         /* FIXME: We really need to calculate the overall height here, not the
3097          * page height.  We assume there's always a vertical scrollbar for
3098          * now.  We need to fix this. */
3099         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3100                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
3101         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3102                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
3103         else
3104                 g_assert_not_reached ();
3105
3106         ev_view_set_zoom (view, scale, FALSE);
3107 }
3108
3109 static void
3110 ev_view_zoom_for_size_dual_page (EvView *view,
3111                                  int     width,
3112                                  int     height,
3113                                  int     vsb_width,
3114                                  int     hsb_height)
3115 {
3116         GtkBorder border;
3117         gint doc_width, doc_height;
3118         gdouble scale;
3119         gint other_page;
3120
3121         other_page = view->current_page ^ 1;
3122
3123         /* Find the largest of the two. */
3124         ev_page_cache_get_size (view->page_cache,
3125                                 view->current_page,
3126                                 view->rotation,
3127                                 1.0,
3128                                 &doc_width, &doc_height);
3129
3130         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
3131                 gint width_2, height_2;
3132                 ev_page_cache_get_size (view->page_cache,
3133                                         other_page,
3134                                         view->rotation,
3135                                         1.0,
3136                                         &width_2, &height_2);
3137                 if (width_2 > doc_width)
3138                         doc_width = width_2;
3139                 if (height_2 > doc_height)
3140                         doc_height = height_2;
3141         }
3142         compute_border (view, doc_width, doc_height, &border);
3143
3144         doc_width = doc_width * 2;
3145         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
3146         height -= (border.top + border.bottom + 2 * view->spacing);
3147
3148         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3149                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3150         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3151                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3152         else
3153                 g_assert_not_reached ();
3154
3155         ev_view_set_zoom (view, scale, FALSE);
3156 }
3157
3158 static void
3159 ev_view_zoom_for_size_single_page (EvView *view,
3160                                    int     width,
3161                                    int     height,
3162                                    int     vsb_width,
3163                                    int     hsb_height)
3164 {
3165         int doc_width, doc_height;
3166         GtkBorder border;
3167         gdouble scale;
3168
3169         ev_page_cache_get_size (view->page_cache,
3170                                 view->current_page,
3171                                 view->rotation,
3172                                 1.0,
3173                                 &doc_width,
3174                                 &doc_height);
3175         /* Get an approximate border */
3176         compute_border (view, width, height, &border);
3177
3178         width -= (border.left + border.right + 2 * view->spacing);
3179         height -= (border.top + border.bottom + 2 * view->spacing);
3180
3181         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
3182                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
3183         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
3184                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
3185         else
3186                 g_assert_not_reached ();
3187
3188         ev_view_set_zoom (view, scale, FALSE);
3189 }
3190
3191 void
3192 ev_view_set_zoom_for_size (EvView *view,
3193                            int     width,
3194                            int     height,
3195                            int     vsb_width,
3196                            int     hsb_height)
3197 {
3198         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
3199                           view->sizing_mode == EV_SIZING_BEST_FIT);
3200         g_return_if_fail (width >= 0);
3201         g_return_if_fail (height >= 0);
3202
3203         if (view->document == NULL)
3204                 return;
3205
3206         if (view->presentation)
3207                 ev_view_zoom_for_size_presentation (view, width, height);
3208         else if (view->continuous && view->dual_page)
3209                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
3210         else if (view->continuous)
3211                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
3212         else if (view->dual_page)
3213                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
3214         else
3215                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
3216 }
3217
3218 /*** Status text messages ***/
3219
3220 const char *
3221 ev_view_get_status (EvView *view)
3222 {
3223         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3224
3225         return view->status;
3226 }
3227
3228 static void
3229 ev_view_set_status (EvView *view, const char *message)
3230 {
3231         g_return_if_fail (EV_IS_VIEW (view));
3232
3233         if (message != view->status) {
3234                 g_free (view->status);
3235                 view->status = g_strdup (message);
3236                 g_object_notify (G_OBJECT (view), "status");
3237         }
3238 }
3239
3240 static void
3241 update_find_status_message (EvView *view)
3242 {
3243         char *message;
3244
3245         if (view->current_page == view->find_page) {
3246                 int results;
3247
3248                 results = ev_document_find_get_n_results
3249                                 (EV_DOCUMENT_FIND (view->document),
3250                                  view->current_page);
3251                 /* TRANS: Sometimes this could be better translated as
3252                    "%d hit(s) on this page".  Therefore this string
3253                    contains plural cases. */
3254                 message = g_strdup_printf (ngettext ("%d found on this page",
3255                                                      "%d found on this page",
3256                                                      results),
3257                                            results);
3258         } else {
3259                 double percent;
3260
3261                 percent = ev_document_find_get_progress
3262                                 (EV_DOCUMENT_FIND (view->document));
3263                 if (percent >= (1.0 - 1e-10)) {
3264                         message = g_strdup (_("Not found"));
3265                 } else {
3266                         message = g_strdup_printf (_("%3d%% remaining to search"),
3267                                                    (int) ((1.0 - percent) * 100));
3268                 }
3269
3270         }
3271         ev_view_set_find_status (view, message);
3272         g_free (message);
3273 }
3274
3275 const char *
3276 ev_view_get_find_status (EvView *view)
3277 {
3278         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
3279
3280         return view->find_status;
3281 }
3282
3283 static void
3284 ev_view_set_find_status (EvView *view, const char *message)
3285 {
3286         g_return_if_fail (EV_IS_VIEW (view));
3287
3288         g_free (view->find_status);
3289         view->find_status = g_strdup (message);
3290         g_object_notify (G_OBJECT (view), "find-status");
3291 }
3292
3293 /*** Find ***/
3294
3295 static void
3296 jump_to_find_result (EvView *view)
3297 {
3298         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3299         EvRectangle rect;
3300         GdkRectangle view_rect;
3301         int n_results;
3302         int page = view->find_page;
3303
3304         n_results = ev_document_find_get_n_results (find, page);
3305
3306         if (n_results > 0  && view->find_result < n_results) {
3307                 ev_document_find_get_result
3308                         (find, page, view->find_result, &rect);
3309
3310                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
3311                 ensure_rectangle_is_visible (view, &view_rect);
3312         }
3313 }
3314
3315 static void
3316 jump_to_find_page (EvView *view, EvViewFindDirection direction)
3317 {
3318         int n_pages, i;
3319
3320         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3321
3322         for (i = 0; i < n_pages; i++) {
3323                 int has_results;
3324                 int page;
3325
3326                 if (direction == EV_VIEW_FIND_NEXT)
3327                         page = view->find_page + i;
3328                 else
3329                         page = view->find_page - i;
3330
3331
3332                 if (page >= n_pages) {
3333                         page = page - n_pages;
3334                 }
3335                 if (page < 0)
3336                         page = page + n_pages;
3337
3338                 has_results = ev_document_find_page_has_results
3339                                 (EV_DOCUMENT_FIND (view->document), page);
3340                 if (has_results == -1) {
3341                         view->find_page = page;
3342                         break;
3343                 } else if (has_results == 1) {
3344                         ev_page_cache_set_current_page (view->page_cache, page);
3345                         break;
3346                 }
3347         }
3348 }
3349
3350 gboolean
3351 ev_view_can_find_next (EvView *view)
3352 {
3353         if (EV_IS_DOCUMENT_FIND (view->document)) {
3354                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3355                 int i, n_pages;
3356
3357                 n_pages = ev_page_cache_get_n_pages (view->page_cache);
3358                 for (i = 0; i < n_pages; i++) {
3359                         if (ev_document_find_get_n_results (find, i) > 0) {
3360                                 return TRUE;
3361                         }
3362                 }
3363         }
3364
3365         return FALSE;
3366 }
3367
3368 void
3369 ev_view_find_next (EvView *view)
3370 {
3371         int n_results, n_pages;
3372         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3373
3374         n_results = ev_document_find_get_n_results (find, view->current_page);
3375
3376         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3377
3378         view->find_result++;
3379
3380         if (view->find_result >= n_results) {
3381
3382                 view->find_result = 0;
3383                 view->find_page++;
3384                 if (view->find_page >= n_pages) {
3385                         view->find_page = 0;
3386                 }
3387
3388                 jump_to_find_page (view, EV_VIEW_FIND_NEXT);
3389                 jump_to_find_result (view);
3390         } else {
3391                 jump_to_find_result (view);
3392                 gtk_widget_queue_draw (GTK_WIDGET (view));
3393         }
3394 }
3395
3396 void
3397 ev_view_find_previous (EvView *view)
3398 {
3399         int n_results, n_pages;
3400         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
3401         EvPageCache *page_cache;
3402
3403         page_cache = ev_page_cache_get (view->document);
3404
3405         n_results = ev_document_find_get_n_results (find, view->current_page);
3406
3407         n_pages = ev_page_cache_get_n_pages (page_cache);
3408
3409         view->find_result--;
3410
3411         if (view->find_result < 0) {
3412
3413                 view->find_page--;
3414                 if (view->find_page < 0) {
3415                         view->find_page = n_pages - 1;
3416                 }
3417
3418                 jump_to_find_page (view, EV_VIEW_FIND_PREV);
3419                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
3420                 jump_to_find_result (view);
3421         } else {
3422                 jump_to_find_result (view);
3423                 gtk_widget_queue_draw (GTK_WIDGET (view));
3424         }
3425 }
3426
3427 /*** Selections ***/
3428
3429 /* compute_new_selection_rect/text calculates the area currently selected by
3430  * view_rect.  each handles a different mode;
3431  */
3432 static GList *
3433 compute_new_selection_rect (EvView       *view,
3434                             GdkPoint     *start,
3435                             GdkPoint     *stop)
3436 {
3437         GdkRectangle view_rect;
3438         int n_pages, i;
3439         GList *list = NULL;
3440
3441         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
3442
3443         view_rect.x = MIN (start->x, stop->x);
3444         view_rect.y = MIN (start->y, stop->y);
3445         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
3446         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
3447
3448         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3449
3450         for (i = 0; i < n_pages; i++) {
3451                 GdkRectangle page_area;
3452                 GtkBorder border;
3453
3454                 if (get_page_extents (view, i, &page_area, &border)) {
3455                         GdkRectangle overlap;
3456
3457                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
3458                                 EvViewSelection *selection;
3459
3460                                 selection = g_new0 (EvViewSelection, 1);
3461                                 selection->page = i;
3462                                 view_rect_to_doc_rect (view, &overlap, &page_area,
3463                                                        &(selection->rect));
3464
3465                                 list = g_list_append (list, selection);
3466                         }
3467                 }
3468         }
3469
3470         return list;
3471 }
3472
3473 static gboolean
3474 gdk_rectangle_point_in (GdkRectangle *rectangle,
3475                         GdkPoint     *point)
3476 {
3477         return rectangle->x <= point->x &&
3478                 rectangle->y <= point->y &&
3479                 point->x < rectangle->x + rectangle->width &&
3480                 point->y < rectangle->y + rectangle->height;
3481 }
3482
3483 static GList *
3484 compute_new_selection_text (EvView   *view,
3485                             GdkPoint *start,
3486                             GdkPoint *stop)
3487 {
3488         int n_pages, i, first, last;
3489         GList *list = NULL;
3490         EvViewSelection *selection;
3491         gint width, height;
3492         int start_page, end_page;
3493
3494         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
3495
3496         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3497
3498         /* First figure out the range of pages the selection
3499          * affects. */
3500         first = n_pages;
3501         last = 0;
3502         if (view->continuous) {
3503                 start_page = 0;
3504                 end_page = n_pages;
3505         } else if (view->dual_page) {
3506                 start_page = view->start_page;
3507                 end_page = view->end_page + 1;
3508         } else {
3509                 start_page = view->current_page;
3510                 end_page = view->current_page + 1;
3511         }
3512
3513         for (i = start_page; i < end_page; i++) {
3514                 GdkRectangle page_area;
3515                 GtkBorder border;
3516
3517                 get_page_extents (view, i, &page_area, &border);
3518                 if (gdk_rectangle_point_in (&page_area, start) ||
3519                     gdk_rectangle_point_in (&page_area, stop)) {
3520                         if (first == n_pages)
3521                                 first = i;
3522                         last = i;
3523                 }
3524
3525         }
3526
3527
3528
3529         /* Now create a list of EvViewSelection's for the affected
3530          * pages.  This could be an empty list, a list of just one
3531          * page or a number of pages.*/
3532         for (i = first; i < last + 1; i++) {
3533                 GdkRectangle page_area;
3534                 GtkBorder border;
3535                 GdkPoint *point;
3536
3537                 ev_page_cache_get_size (view->page_cache, i,
3538                                         view->rotation,
3539                                         1.0, &width, &height);
3540
3541                 selection = g_new0 (EvViewSelection, 1);
3542                 selection->page = i;
3543                 selection->rect.x1 = selection->rect.y1 = 0;
3544                 selection->rect.x2 = width;
3545                 selection->rect.y2 = height;
3546
3547                 get_page_extents (view, i, &page_area, &border);
3548
3549                 if (gdk_rectangle_point_in (&page_area, start))
3550                         point = start;
3551                 else
3552                         point = stop;
3553
3554                 if (i == first)
3555                         view_point_to_doc_point (view, point, &page_area,
3556                                                  &selection->rect.x1,
3557                                                  &selection->rect.y1);
3558
3559                 /* If the selection is contained within just one page,
3560                  * make sure we don't write 'start' into both points
3561                  * in selection->rect. */
3562                 if (first == last)
3563                         point = stop;
3564
3565                 if (i == last)
3566                         view_point_to_doc_point (view, point, &page_area,
3567                                                  &selection->rect.x2,
3568                                                  &selection->rect.y2);
3569
3570                 list = g_list_append (list, selection);
3571         }
3572
3573         return list;
3574 }
3575
3576 /* This function takes the newly calculated list, and figures out which regions
3577  * have changed.  It then queues a redraw approporiately.
3578  */
3579 static void
3580 merge_selection_region (EvView *view,
3581                         GList  *new_list)
3582 {
3583         GList *old_list;
3584         GList *new_list_ptr, *old_list_ptr;
3585
3586         /* Update the selection */
3587         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3588         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3589         view->selection_info.selections = new_list;
3590         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3591         g_object_notify (G_OBJECT (view), "has-selection");
3592
3593         new_list_ptr = new_list;
3594         old_list_ptr = old_list;
3595
3596         while (new_list_ptr || old_list_ptr) {
3597                 EvViewSelection *old_sel, *new_sel;
3598                 int cur_page;
3599                 GdkRegion *region = NULL;
3600
3601                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3602                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3603
3604                 /* Assume that the lists are in order, and we run through them
3605                  * comparing them, one page at a time.  We come out with the
3606                  * first page we see. */
3607                 if (new_sel && old_sel) {
3608                         if (new_sel->page < old_sel->page) {
3609                                 new_list_ptr = new_list_ptr->next;
3610                                 old_sel = NULL;
3611                         } else if (new_sel->page > old_sel->page) {
3612                                 old_list_ptr = old_list_ptr->next;
3613                                 new_sel = NULL;
3614                         } else {
3615                                 new_list_ptr = new_list_ptr->next;
3616                                 old_list_ptr = old_list_ptr->next;
3617                         }
3618                 } else if (new_sel) {
3619                         new_list_ptr = new_list_ptr->next;
3620                 } else if (old_sel) {
3621                         old_list_ptr = old_list_ptr->next;
3622                 }
3623
3624                 g_assert (new_sel || old_sel);
3625
3626                 /* is the page we're looking at on the screen?*/
3627                 cur_page = new_sel ? new_sel->page : old_sel->page;
3628                 if (cur_page < view->start_page || cur_page > view->end_page)
3629                         continue;
3630
3631                 /* seed the cache with a new page.  We are going to need the new
3632                  * region too. */
3633                 if (new_sel) {
3634                         GdkRegion *tmp_region = NULL;
3635                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3636                                                               cur_page,
3637                                                               view->scale,
3638                                                               &tmp_region);
3639                         if (tmp_region) {
3640                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3641                         }
3642                 }
3643
3644                 /* Now we figure out what needs redrawing */
3645                 if (old_sel && new_sel) {
3646                         if (old_sel->covered_region &&
3647                             new_sel->covered_region) {
3648                                 /* We only want to redraw the areas that have
3649                                  * changed, so we xor the old and new regions
3650                                  * and redraw if it's different */
3651                                 region = gdk_region_copy (old_sel->covered_region);
3652                                 gdk_region_xor (region, new_sel->covered_region);
3653                                 if (gdk_region_empty (region)) {
3654                                         gdk_region_destroy (region);
3655                                         region = NULL;
3656                                 }
3657                         } else if (old_sel->covered_region) {
3658                                 region = gdk_region_copy (old_sel->covered_region);
3659                         } else if (new_sel->covered_region) {
3660                                 region = gdk_region_copy (new_sel->covered_region);
3661                         }
3662                 } else if (old_sel && !new_sel) {
3663                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3664                                 region = gdk_region_copy (old_sel->covered_region);
3665                         }
3666                 } else if (!old_sel && new_sel) {
3667                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3668                                 region = gdk_region_copy (new_sel->covered_region);
3669                         }
3670                 } else {
3671                         g_assert_not_reached ();
3672                 }
3673
3674                 /* Redraw the damaged region! */
3675                 if (region) {
3676                         GdkRectangle page_area;
3677                         GtkBorder border;
3678
3679                         get_page_extents (view, cur_page, &page_area, &border);
3680                         gdk_region_offset (region,
3681                                            page_area.x + border.left - view->scroll_x,
3682                                            page_area.y + border.top - view->scroll_y);
3683                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3684                         gdk_region_destroy (region);
3685                 }
3686         }
3687
3688         /* Free the old list, now that we're done with it. */
3689         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3690 }
3691
3692 static void
3693 compute_selections (EvView   *view,
3694                     GdkPoint *start,
3695                     GdkPoint *stop)
3696 {
3697         GList *list;
3698
3699         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3700                 list = compute_new_selection_rect (view, start, stop);
3701         else
3702                 list = compute_new_selection_text (view, start, stop);
3703         merge_selection_region (view, list);
3704 }
3705
3706 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3707  */
3708 static void
3709 selection_free (EvViewSelection *selection)
3710 {
3711         if (selection->covered_region)
3712                 gdk_region_destroy (selection->covered_region);
3713         g_free (selection);
3714 }
3715
3716 static void
3717 clear_selection (EvView *view)
3718 {
3719         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3720         view->selection_info.selections = NULL;
3721         view->selection_info.in_selection = FALSE;
3722         g_object_notify (G_OBJECT (view), "has-selection");
3723 }
3724
3725
3726 void
3727 ev_view_select_all (EvView *view)
3728 {
3729         int n_pages, i;
3730
3731         /* Disable selection on rotated pages for the 0.4.0 series */
3732         if (view->rotation != 0)
3733                 return;
3734
3735         clear_selection (view);
3736
3737         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3738         for (i = 0; i < n_pages; i++) {
3739                 int width, height;
3740                 EvViewSelection *selection;
3741
3742                 ev_page_cache_get_size (view->page_cache,
3743                                         i,
3744                                         view->rotation,
3745                                         1.0, &width, &height);
3746
3747                 selection = g_new0 (EvViewSelection, 1);
3748                 selection->page = i;
3749                 selection->rect.x1 = selection->rect.y1 = 0;
3750                 selection->rect.x2 = width;
3751                 selection->rect.y2 = height;
3752
3753                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3754         }
3755
3756         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3757         g_object_notify (G_OBJECT (view), "has-selection");
3758         gtk_widget_queue_draw (GTK_WIDGET (view));
3759 }
3760
3761 gboolean
3762 ev_view_get_has_selection (EvView *view)
3763 {
3764         return view->selection_info.selections != NULL;
3765 }
3766
3767 static char *
3768 get_selected_text (EvView *ev_view)
3769 {
3770         GString *text;
3771         GList *l;
3772
3773         text = g_string_new (NULL);
3774
3775         ev_document_doc_mutex_lock ();
3776
3777         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3778                 EvViewSelection *selection = (EvViewSelection *)l->data;
3779                 char *tmp;
3780
3781                 tmp = ev_document_get_text (ev_view->document,
3782                                             selection->page,
3783                                             &selection->rect);
3784                 g_string_append (text, tmp);
3785                 g_free (tmp);
3786         }
3787
3788         ev_document_doc_mutex_unlock ();
3789
3790         return g_string_free (text, FALSE);
3791 }
3792
3793 void
3794 ev_view_copy (EvView *ev_view)
3795 {
3796         GtkClipboard *clipboard;
3797         char *text;
3798
3799         if (!ev_document_can_get_text (ev_view->document)) {
3800                 return;
3801         }
3802
3803         text = get_selected_text (ev_view);
3804         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3805                                               GDK_SELECTION_CLIPBOARD);
3806         gtk_clipboard_set_text (clipboard, text, -1);
3807         g_free (text);
3808 }
3809
3810 static void
3811 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3812                         GtkSelectionData *selection_data,
3813                         guint             info,
3814                         gpointer          data)
3815 {
3816         EvView *ev_view = EV_VIEW (data);
3817         char *text;
3818
3819         if (!ev_document_can_get_text (ev_view->document)) {
3820                 return;
3821         }
3822
3823         text = get_selected_text (ev_view);
3824         gtk_selection_data_set_text (selection_data, text, -1);
3825         g_free (text);
3826 }
3827
3828 static void
3829 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3830                           gpointer      data)
3831 {
3832         EvView *view = EV_VIEW (data);
3833
3834         clear_selection (view);
3835 }
3836
3837 static void
3838 ev_view_update_primary_selection (EvView *ev_view)
3839 {
3840         GtkClipboard *clipboard;
3841
3842         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3843                                               GDK_SELECTION_PRIMARY);
3844
3845         if (ev_view->selection_info.selections) {
3846                 if (!gtk_clipboard_set_with_owner (clipboard,
3847                                                    targets,
3848                                                    G_N_ELEMENTS (targets),
3849                                                    ev_view_primary_get_cb,
3850                                                    ev_view_primary_clear_cb,
3851                                                    G_OBJECT (ev_view)))
3852                         ev_view_primary_clear_cb (clipboard, ev_view);
3853         } else {
3854                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3855                         gtk_clipboard_clear (clipboard);
3856         }
3857 }
3858
3859 /*** Cursor operations ***/
3860
3861 static GdkCursor *
3862 ev_view_create_invisible_cursor(void)
3863 {
3864        GdkBitmap *empty;
3865        GdkColor black = { 0, 0, 0, 0 };
3866        static char bits[] = { 0x00 };
3867
3868        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3869
3870        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3871 }
3872
3873 static void
3874 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3875 {
3876         GdkCursor *cursor = NULL;
3877         GdkDisplay *display;
3878         GtkWidget *widget;
3879
3880         if (view->cursor == new_cursor) {
3881                 return;
3882         }
3883
3884         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3885         display = gtk_widget_get_display (widget);
3886         view->cursor = new_cursor;
3887
3888         switch (new_cursor) {
3889                 case EV_VIEW_CURSOR_NORMAL:
3890                         gdk_window_set_cursor (widget->window, NULL);
3891                         break;
3892                 case EV_VIEW_CURSOR_IBEAM:
3893                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3894                         break;
3895                 case EV_VIEW_CURSOR_LINK:
3896                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3897                         break;
3898                 case EV_VIEW_CURSOR_WAIT:
3899                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3900                         break;
3901                 case EV_VIEW_CURSOR_HIDDEN:
3902                         cursor = ev_view_create_invisible_cursor ();
3903                         break;
3904                 case EV_VIEW_CURSOR_DRAG:
3905                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3906                         break;
3907         }
3908
3909         if (cursor) {
3910                 gdk_window_set_cursor (widget->window, cursor);
3911                 gdk_cursor_unref (cursor);
3912                 gdk_flush();
3913         }
3914 }
3915
3916 void
3917 ev_view_hide_cursor (EvView *view)
3918 {
3919        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3920 }
3921
3922 void
3923 ev_view_show_cursor (EvView *view)
3924 {
3925        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3926 }
3927
3928 gboolean
3929 ev_view_next_page (EvView *view)
3930 {
3931         int page;
3932
3933         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3934
3935         page = ev_page_cache_get_current_page (view->page_cache);
3936         page = ev_view_get_dual_page (view) ? page + 2 : page + 1;
3937
3938         if (page < ev_page_cache_get_n_pages (view->page_cache)) {
3939                 ev_page_cache_set_current_page (view->page_cache, page);
3940                 return TRUE;
3941         } else {
3942                 return FALSE;
3943         }
3944 }
3945
3946 gboolean
3947 ev_view_previous_page (EvView *view)
3948 {
3949         int page;
3950
3951         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3952
3953         page = ev_page_cache_get_current_page (view->page_cache);
3954         page = ev_view_get_dual_page (view) ? page - 2 : page - 1;
3955
3956         if (page >= 0) {
3957                 ev_page_cache_set_current_page (view->page_cache, page);
3958                 return TRUE;
3959         } else {
3960                 return FALSE;
3961         }
3962 }
3963
3964 gboolean
3965 ev_view_can_previous_page (EvView *view)
3966 {
3967         int page;
3968
3969         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3970
3971         page = ev_page_cache_get_current_page (view->page_cache);
3972         page = ev_view_get_dual_page (view) ? page - 2 : page - 1;
3973
3974         return (page >=0);
3975 }
3976
3977 gboolean ev_view_can_next_page (EvView *view)
3978 {
3979         int page;
3980
3981         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
3982
3983         page = ev_page_cache_get_current_page (view->page_cache);
3984         page = ev_view_get_dual_page (view) ? page + 2 : page + 1;
3985
3986         return (page < ev_page_cache_get_n_pages (view->page_cache));
3987 }
3988
3989 /*** Enum description for usage in signal ***/
3990
3991 GType
3992 ev_sizing_mode_get_type (void)
3993 {
3994   static GType etype = 0;
3995   if (etype == 0) {
3996     static const GEnumValue values[] = {
3997       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3998       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3999       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
4000       { 0, NULL, NULL }
4001     };
4002     etype = g_enum_register_static ("EvSizingMode", values);
4003   }
4004   return etype;
4005 }