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