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 <gtk/gtkalignment.h>
  23 #include <glib/gi18n.h>
  24 #include <gtk/gtkbindings.h>
  25 #include <gtk/gtkselection.h>
  26 #include <gtk/gtkclipboard.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <libgnomevfs/gnome-vfs-utils.h>
  29
  30 #include "ev-marshal.h"
  31 #include "ev-view.h"
  32 #include "ev-utils.h"
  33 #include "ev-selection.h"
  34 #include "ev-document-find.h"
  35 #include "ev-document-misc.h"
  36 #include "ev-debug.h"
  37 #include "ev-job-queue.h"
  38 #include "ev-page-cache.h"
  39 #include "ev-pixbuf-cache.h"
  40
  41 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  42 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  43 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  44
  45
  46 enum {
  47         PROP_0,
  48         PROP_STATUS,
  49         PROP_FIND_STATUS,
  50         PROP_CONTINUOUS,
  51         PROP_DUAL_PAGE,
  52         PROP_FULLSCREEN,
  53         PROP_PRESENTATION,
  54         PROP_SIZING_MODE,
  55         PROP_ZOOM,
  56 };
  57
  58 enum {
  59         SIGNAL_BINDING_ACTIVATED,
  60         SIGNAL_ZOOM_INVALID,
  61         N_SIGNALS,
  62 };
  63
  64 enum {
  65         TARGET_STRING,
  66         TARGET_TEXT,
  67         TARGET_COMPOUND_TEXT,
  68         TARGET_UTF8_STRING,
  69         TARGET_TEXT_BUFFER_CONTENTS
  70 };
  71
  72 static const GtkTargetEntry targets[] = {
  73         { "STRING", 0, TARGET_STRING },
  74         { "TEXT",   0, TARGET_TEXT },
  75         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  76         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  77 };
  78
  79 static guint signals[N_SIGNALS];
  80
  81 typedef enum {
  82         EV_VIEW_CURSOR_NORMAL,
  83         EV_VIEW_CURSOR_IBEAM,
  84         EV_VIEW_CURSOR_LINK,
  85         EV_VIEW_CURSOR_WAIT,
  86         EV_VIEW_CURSOR_HIDDEN,
  87         EV_VIEW_CURSOR_DRAG
  88 } EvViewCursor;
  89
  90 typedef enum {
  91         EV_VIEW_FIND_NEXT,
  92         EV_VIEW_FIND_PREV
  93 } EvViewFindDirection;
  94
  95 #define ZOOM_IN_FACTOR  1.2
  96 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
  97
  98 #define MIN_SCALE 0.05409
  99 #define MAX_SCALE 4.0
 100
 101 /* Information for middle clicking and moving around the doc */
 102 typedef struct {
 103         gboolean in_drag;
 104         GdkPoint start;
 105         gdouble hadj;
 106         gdouble vadj;
 107 } DragInfo;
 108
 109 /* Information for handling selection */
 110 typedef struct {
 111         gboolean in_selection;
 112         GdkPoint start;
 113         GList *selections;
 114 } SelectionInfo;
 115
 116 typedef enum {
 117         SCROLL_TO_KEEP_POSITION,
 118         SCROLL_TO_CURRENT_PAGE,
 119         SCROLL_TO_CENTER
 120 } PendingScroll;
 121
 122 struct _EvView {
 123         GtkWidget parent_instance;
 124
 125         EvDocument *document;
 126
 127         char *status;
 128         char *find_status;
 129
 130         /* Scrolling */
 131         GtkAdjustment *hadjustment;
 132         GtkAdjustment *vadjustment;
 133
 134         gint scroll_x;
 135         gint scroll_y;
 136
 137         /* Information for middle clicking and dragging around. */
 138         DragInfo drag_info;
 139
 140         /* Selection */
 141         gint motion_x;
 142         gint motion_y;
 143         guint selection_update_id;
 144
 145         EvViewSelectionMode selection_mode;
 146         SelectionInfo selection_info;
 147
 148         int pressed_button;
 149         EvViewCursor cursor;
 150
 151         EvPageCache *page_cache;
 152         EvPixbufCache *pixbuf_cache;
 153
 154         gint start_page;
 155         gint end_page;
 156         gint current_page;
 157
 158         EvJobRender *current_job;
 159
 160         int find_page;
 161         int find_result;
 162         int spacing;
 163
 164         int rotation;
 165         double scale;
 166
 167         gboolean continuous;
 168         gboolean dual_page;
 169         gboolean fullscreen;
 170         gboolean presentation;
 171         EvSizingMode sizing_mode;
 172
 173         PendingScroll pending_scroll;
 174         gboolean pending_resize;
 175 };
 176
 177 struct _EvViewClass {
 178         GtkWidgetClass parent_class;
 179
 180         void    (*set_scroll_adjustments) (EvView         *view,
 181                                            GtkAdjustment  *hadjustment,
 182                                            GtkAdjustment  *vadjustment);
 183         void    (*binding_activated)      (EvView         *view,
 184                                            GtkScrollType   scroll,
 185                                            gboolean        horizontal);
 186         void    (*zoom_invalid)           (EvView         *view);
 187 };
 188
 189 /*** Scrolling ***/
 190 static void       scroll_to_current_page                     (EvView *view,
 191                                                               GtkOrientation orientation);
 192 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 193                                                               GtkAdjustment      *hadjustment,
 194                                                               GtkAdjustment      *vadjustment);
 195 static void       view_update_range_and_current_page         (EvView             *view);
 196 static void       set_scroll_adjustment                      (EvView             *view,
 197                                                               GtkOrientation      orientation,
 198                                                               GtkAdjustment      *adjustment);
 199 static void       ev_view_set_scroll_adjustments             (EvView             *view,
 200                                                               GtkAdjustment      *hadjustment,
 201                                                               GtkAdjustment      *vadjustment);
 202 static void       add_scroll_binding_keypad                  (GtkBindingSet      *binding_set,
 203                                                               guint               keyval,
 204                                                               GtkScrollType       scroll,
 205                                                               gboolean            horizontal);
 206 static void       ev_view_binding_activated                  (EvView             *view,
 207                                                               GtkScrollType       scroll,
 208                                                               gboolean            horizontal);
 209 static void       ensure_rectangle_is_visible                (EvView             *view,
 210                                                               GdkRectangle       *rect);
 211
 212 /*** Geometry computations ***/
 213 static void       compute_border                             (EvView             *view,
 214                                                               int                 width,
 215                                                               int                 height,
 216                                                               GtkBorder          *border);
 217 static void       get_page_y_offset                          (EvView *view,
 218                                                               int page,
 219                                                               double zoom,
 220                                                               int *y_offset);
 221 static gboolean   get_page_extents                           (EvView             *view,
 222                                                               gint                page,
 223                                                               GdkRectangle       *page_area,
 224                                                               GtkBorder          *border);
 225 static void       view_rect_to_doc_rect                      (EvView             *view,
 226                                                               GdkRectangle       *view_rect,
 227                                                               GdkRectangle       *page_area,
 228                                                               EvRectangle        *doc_rect);
 229 static void       doc_rect_to_view_rect                      (EvView             *view,
 230                                                               int                 page,
 231                                                               EvRectangle        *doc_rect,
 232                                                               GdkRectangle       *view_rect);
 233 static void       find_page_at_location                      (EvView             *view,
 234                                                               gdouble             x,
 235                                                               gdouble             y,
 236                                                               gint               *page,
 237                                                               gint               *x_offset,
 238                                                               gint               *y_offset);
 239 static void       ev_view_queue_draw_page                    (EvView             *view,
 240                                                               gint                page);
 241
 242 /*** Hyperrefs ***/
 243 static EvLink*    get_link_at_location                       (EvView             *view,
 244                                                               gdouble             x,
 245                                                               gdouble             y);
 246 static void       go_to_link                                 (EvView             *view,
 247                                                               EvLink             *link);
 248 static char*      status_message_from_link                   (EvView             *view,
 249                                                               EvLink             *link);
 250
 251 /*** GtkWidget implementation ***/
 252 static void       ev_view_size_request_continuous_dual_page  (EvView             *view,
 253                                                               GtkRequisition     *requisition);
 254 static void       ev_view_size_request_continuous            (EvView             *view,
 255                                                               GtkRequisition     *requisition);
 256 static void       ev_view_size_request_dual_page             (EvView             *view,
 257                                                               GtkRequisition     *requisition);
 258 static void       ev_view_size_request_single_page           (EvView             *view,
 259                                                               GtkRequisition     *requisition);
 260 static void       ev_view_size_request                       (GtkWidget          *widget,
 261                                                               GtkRequisition     *requisition);
 262 static void       ev_view_size_allocate                      (GtkWidget          *widget,
 263                                                               GtkAllocation      *allocation);
 264 static void       ev_view_realize                            (GtkWidget          *widget);
 265 static void       ev_view_unrealize                          (GtkWidget          *widget);
 266 static gboolean   ev_view_scroll_event                       (GtkWidget          *widget,
 267                                                               GdkEventScroll     *event);
 268 static gboolean   ev_view_expose_event                       (GtkWidget          *widget,
 269                                                               GdkEventExpose     *event);
 270 static gboolean   ev_view_button_press_event                 (GtkWidget          *widget,
 271                                                               GdkEventButton     *event);
 272 static gboolean   ev_view_motion_notify_event                (GtkWidget          *widget,
 273                                                               GdkEventMotion     *event);
 274 static gboolean   ev_view_button_release_event               (GtkWidget          *widget,
 275                                                               GdkEventButton     *event);
 276 static gboolean   ev_view_leave_notify_event                 (GtkWidget          *widget,
 277                                                               GdkEventCrossing   *event);
 278 static void       ev_view_style_set                          (GtkWidget          *widget,
 279                                                               GtkStyle           *old_style);
 280
 281 /*** Drawing ***/
 282 static guint32    ev_gdk_color_to_rgb                        (const GdkColor     *color);
 283 static void       draw_rubberband                            (GtkWidget          *widget,
 284                                                               GdkWindow          *window,
 285                                                               const GdkRectangle *rect,
 286                                                               guchar              alpha);
 287 static void       highlight_find_results                     (EvView             *view,
 288                                                               int                 page);
 289 static void       draw_one_page                              (EvView             *view,
 290                                                               gint                page,
 291                                                               GdkRectangle       *page_area,
 292                                                               GtkBorder          *border,
 293                                                               GdkRectangle       *expose_area);
 294
 295 /*** Callbacks ***/
 296 static void       find_changed_cb                            (EvDocument         *document,
 297                                                               int                 page,
 298                                                               EvView             *view);
 299 static void       job_finished_cb                            (EvPixbufCache      *pixbuf_cache,
 300                                                               EvView             *view);
 301 static void       page_changed_cb                            (EvPageCache        *page_cache,
 302                                                               int                 new_page,
 303                                                               EvView             *view);
 304 static void       on_adjustment_value_changed                (GtkAdjustment      *adjustment,
 305                                                               EvView             *view);
 306
 307 /*** GObject ***/
 308 static void       ev_view_finalize                           (GObject            *object);
 309 static void       ev_view_destroy                            (GtkObject          *object);
 310 static void       ev_view_set_property                       (GObject            *object,
 311                                                               guint               prop_id,
 312                                                               const GValue       *value,
 313                                                               GParamSpec         *pspec);
 314 static void       ev_view_get_property                       (GObject            *object,
 315                                                               guint               prop_id,
 316                                                               GValue             *value,
 317                                                               GParamSpec         *pspec);
 318 static void       ev_view_class_init                         (EvViewClass        *class);
 319 static void       ev_view_init                               (EvView             *view);
 320
 321 /*** Zoom and sizing ***/
 322 static double   zoom_for_size_fit_width                      (int doc_width,
 323                                                               int doc_height,
 324                                                               int target_width,
 325                                                               int target_height,
 326                                                               int vsb_width);
 327 static double   zoom_for_size_best_fit                       (int doc_width,
 328                                                               int doc_height,
 329                                                               int target_width,
 330                                                               int target_height,
 331                                                               int vsb_width,
 332                                                               int hsb_width);
 333 static void     ev_view_zoom_for_size_presentation           (EvView *view,
 334                                                               int     width,
 335                                                               int     height);
 336 static void     ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
 337                                                                 int     width,
 338                                                                 int     height,
 339                                                                 int     vsb_width,
 340                                                                 int     hsb_height);
 341 static void     ev_view_zoom_for_size_continuous               (EvView *view,
 342                                                                 int     width,
 343                                                                 int     height,
 344                                                                 int     vsb_width,
 345                                                                 int     hsb_height);
 346 static void     ev_view_zoom_for_size_dual_page                (EvView *view,
 347                                                                 int     width,
 348                                                                 int     height,
 349                                                                 int     vsb_width,
 350                                                                 int     hsb_height);
 351 static void     ev_view_zoom_for_size_single_page              (EvView *view,
 352                                                                 int     width,
 353                                                                 int     height,
 354                                                                 int     vsb_width,
 355                                                                 int     hsb_height);
 356 /*** Cursors ***/
 357 static GdkCursor* ev_view_create_invisible_cursor            (void);
 358 static void       ev_view_set_cursor                         (EvView             *view,
 359                                                               EvViewCursor        new_cursor);
 360
 361 /*** Status messages ***/
 362 static void       ev_view_set_status                         (EvView             *view,
 363                                                               const char         *message);
 364 static void       update_find_status_message                 (EvView             *view);
 365 static void       ev_view_set_find_status                    (EvView             *view,
 366                                                               const char         *message);
 367 /*** Find ***/
 368 static void       jump_to_find_result                        (EvView             *view);
 369 static void       jump_to_find_page                          (EvView             *view,
 370                                                               EvViewFindDirection direction);
 371
 372 /*** Selection ***/
 373 static void       compute_selections                         (EvView             *view,
 374                                                               GdkPoint           *start,
 375                                                               GdkPoint           *stop);
 376 static void       clear_selection                            (EvView             *view);
 377 static void       selection_free                             (EvViewSelection    *selection);
 378 static char*      get_selected_text                          (EvView             *ev_view);
 379 static void       ev_view_primary_get_cb                     (GtkClipboard       *clipboard,
 380                                                               GtkSelectionData   *selection_data,
 381                                                               guint               info,
 382                                                               gpointer            data);
 383 static void       ev_view_primary_clear_cb                   (GtkClipboard       *clipboard,
 384                                                               gpointer            data);
 385 static void       ev_view_update_primary_selection           (EvView             *ev_view);
 386
 387
 388 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 389
 390 static void
 391 scroll_to_current_page (EvView *view, GtkOrientation orientation)
 392 {
 393         GdkRectangle page_area;
 394         GtkBorder border;
 395
 396         if (view->document == NULL) {
 397                 return;
 398         }
 399
 400         get_page_extents (view, view->current_page, &page_area, &border);
 401
 402         if (orientation == GTK_ORIENTATION_VERTICAL) {
 403                 if (view->continuous) {
 404                         gtk_adjustment_clamp_page (view->vadjustment,
 405                                                    page_area.y - view->spacing,
 406                                                    page_area.y + view->vadjustment->page_size);
 407                 } else {
 408                         gtk_adjustment_set_value (view->vadjustment,
 409                                                   view->vadjustment->lower);
 410                 }
 411         } else {
 412                 if (view->dual_page) {
 413                         gtk_adjustment_clamp_page (view->hadjustment,
 414                                                    page_area.x,
 415                                                    page_area.x + view->hadjustment->page_size);
 416                 } else {
 417                         gtk_adjustment_set_value (view->hadjustment,
 418                                                   CLAMP (view->hadjustment->value,
 419                                                   view->hadjustment->lower,
 420                                                   view->hadjustment->upper -
 421                                                   view->hadjustment->page_size));
 422                 }
 423         }
 424 }
 425
 426 static void
 427 view_set_adjustment_values (EvView         *view,
 428                             GtkOrientation  orientation)
 429 {
 430         GtkWidget *widget = GTK_WIDGET (view);
 431         GtkAdjustment *adjustment;
 432         int requisition;
 433         int allocation;
 434
 435         double factor;
 436         gint new_value;
 437
 438         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 439                 requisition = widget->requisition.width;
 440                 allocation = widget->allocation.width;
 441                 adjustment = view->hadjustment;
 442         } else {
 443                 requisition = widget->requisition.height;
 444                 allocation = widget->allocation.height;
 445                 adjustment = view->vadjustment;
 446         }
 447
 448         if (!adjustment)
 449                 return;
 450
 451         factor = 1.0;
 452         switch (view->pending_scroll) {
 453                 case SCROLL_TO_KEEP_POSITION:
 454                         factor = (adjustment->value) / adjustment->upper;
 455                         break;
 456                 case SCROLL_TO_CURRENT_PAGE:
 457                         break;
 458                 case SCROLL_TO_CENTER:
 459                         factor = (adjustment->value + adjustment->page_size * 0.5) / adjustment->upper;
 460                         break;
 461         }
 462
 463         adjustment->page_size = allocation;
 464         adjustment->step_increment = allocation * 0.1;
 465         adjustment->page_increment = allocation * 0.9;
 466         adjustment->lower = 0;
 467         adjustment->upper = MAX (allocation, requisition);
 468
 469         /*
 470          * We add 0.5 to the values before to average out our rounding errors.
 471          */
 472         switch (view->pending_scroll) {
 473                 case SCROLL_TO_KEEP_POSITION:
 474                         new_value = CLAMP (adjustment->upper * factor + 0.5, 0, adjustment->upper - adjustment->page_size);
 475                         gtk_adjustment_set_value (adjustment, (int)new_value);
 476                         break;
 477                 case SCROLL_TO_CURRENT_PAGE:
 478                         scroll_to_current_page (view, orientation);
 479                         break;
 480                 case SCROLL_TO_CENTER:
 481                         new_value = CLAMP (adjustment->upper * factor - adjustment->page_size * 0.5 + 0.5,
 482                                            0, adjustment->upper - adjustment->page_size);
 483                         gtk_adjustment_set_value (adjustment, (int)new_value);
 484                         break;
 485         }
 486
 487         gtk_adjustment_changed (adjustment);
 488 }
 489
 490 static void
 491 view_update_range_and_current_page (EvView *view)
 492 {
 493         if (view->pending_scroll != SCROLL_TO_KEEP_POSITION)
 494                 return;
 495
 496         /* Presentation trumps all other modes */
 497         if (view->presentation) {
 498                 view->start_page = view->current_page;
 499                 view->end_page = view->current_page;
 500         } else if (view->continuous) {
 501                 GdkRectangle current_area, unused, page_area;
 502                 GtkBorder border;
 503                 gint current_page;
 504                 gboolean found = FALSE;
 505                 int i;
 506
 507                 if (!(view->vadjustment && view->hadjustment))
 508                         return;
 509
 510                 current_area.x = view->hadjustment->value;
 511                 current_area.width = view->hadjustment->upper;
 512                 current_area.y = view->vadjustment->value;
 513                 current_area.height = view->vadjustment->page_size;
 514
 515                 for (i = 0; i < ev_page_cache_get_n_pages (view->page_cache); i++) {
 516
 517                         get_page_extents (view, i, &page_area, &border);
 518
 519                         if (gdk_rectangle_intersect (&current_area, &page_area, &unused)) {
 520                                 if (! found) {
 521                                         view->start_page = i;
 522                                         found = TRUE;
 523
 524                                 }
 525                                 view->end_page = i;
 526                         } else if (found) {
 527                                 break;
 528                         }
 529                 }
 530
 531                 current_page = ev_page_cache_get_current_page (view->page_cache);
 532
 533                 if (current_page < view->start_page || current_page > view->end_page) {
 534                         view->current_page = view->start_page;
 535                         ev_page_cache_set_current_page (view->page_cache, view->start_page);
 536                 }
 537         } else {
 538                 if (view->dual_page) {
 539                         if (view->current_page % 2 == 0) {
 540                                 view->start_page = view->current_page;
 541                                 if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache))
 542                                         view->end_page = view->start_page + 1;
 543                         } else {
 544                                 view->start_page = view->current_page - 1;
 545                                 view->end_page = view->current_page;
 546                         }
 547                 } else {
 548                         view->start_page = view->current_page;
 549                         view->end_page = view->current_page;
 550                 }
 551         }
 552
 553         ev_pixbuf_cache_set_page_range (view->pixbuf_cache,
 554                                         view->start_page,
 555                                         view->end_page,
 556                                         view->rotation,
 557                                         view->scale,
 558                                         view->selection_info.selections);
 559 }
 560
 561 static void
 562 set_scroll_adjustment (EvView *view,
 563                        GtkOrientation  orientation,
 564                        GtkAdjustment  *adjustment)
 565 {
 566         GtkAdjustment **to_set;
 567
 568         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 569                 to_set = &view->hadjustment;
 570         else
 571                 to_set = &view->vadjustment;
 572
 573         if (*to_set != adjustment) {
 574                 if (*to_set) {
 575                         g_signal_handlers_disconnect_by_func (*to_set,
 576                                                               (gpointer) on_adjustment_value_changed,
 577                                                               view);
 578                         g_object_unref (*to_set);
 579                 }
 580
 581                 *to_set = adjustment;
 582                 view_set_adjustment_values (view, orientation);
 583
 584                 if (*to_set) {
 585                         g_object_ref (*to_set);
 586                         g_signal_connect (*to_set, "value_changed",
 587                                           G_CALLBACK (on_adjustment_value_changed), view);
 588                 }
 589         }
 590 }
 591
 592 static void
 593 ev_view_set_scroll_adjustments (EvView *view,
 594                                 GtkAdjustment  *hadjustment,
 595                                 GtkAdjustment  *vadjustment)
 596 {
 597         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 598         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 599
 600         on_adjustment_value_changed (NULL, view);
 601 }
 602
 603 static void
 604 add_scroll_binding_keypad (GtkBindingSet  *binding_set,
 605                            guint           keyval,
 606                            GtkScrollType   scroll,
 607                            gboolean        horizontal)
 608 {
 609   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 610
 611   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 612                                 "binding_activated", 2,
 613                                 GTK_TYPE_SCROLL_TYPE, scroll,
 614                                 G_TYPE_BOOLEAN, horizontal);
 615   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 616                                 "binding_activated", 2,
 617                                 GTK_TYPE_SCROLL_TYPE, scroll,
 618                                 G_TYPE_BOOLEAN, horizontal);
 619 }
 620
 621 void
 622 ev_view_scroll (EvView        *view,
 623                 EvScrollType   scroll)
 624 {
 625         GtkAdjustment *adjustment;
 626         double value, increment;
 627         gboolean first_page = FALSE;
 628         gboolean last_page = FALSE;
 629
 630         /* Assign values for increment and vertical adjustment */
 631         adjustment = view->vadjustment;
 632         increment = adjustment->page_size * 0.75;
 633         value = adjustment->value;
 634
 635         /* Assign boolean for first and last page */
 636         if (view->current_page == 0)
 637                 first_page = TRUE;
 638         if (view->current_page == ev_page_cache_get_n_pages (view->page_cache) - 1)
 639                 last_page = TRUE;
 640
 641         switch (scroll) {
 642                 case EV_SCROLL_PAGE_BACKWARD:
 643                         /* Do not jump backwards if at the first page */
 644                         if (value == (adjustment->lower) && first_page) {
 645                                 /* Do nothing */
 646                                 /* At the top of a page, assign the upper bound limit of previous page */
 647                         } else if (value == (adjustment->lower)) {
 648                                 value = adjustment->upper - adjustment->page_size;
 649                                 ev_page_cache_set_current_page (view->page_cache, view->current_page - 1);
 650                                 /* Jump to the top */
 651                         } else {
 652                                 value = MAX (value - increment, adjustment->lower);
 653                         }
 654                         break;
 655                 case EV_SCROLL_PAGE_FORWARD:
 656                         /* Do not jump forward if at the last page */
 657                         if (value == (adjustment->upper - adjustment->page_size) && last_page) {
 658                                 /* Do nothing */
 659                         /* At the bottom of a page, assign the lower bound limit of next page */
 660                         } else if (value == (adjustment->upper - adjustment->page_size)) {
 661                                 value = 0;
 662                                 ev_page_cache_set_current_page (view->page_cache, view->current_page + 1);
 663                         /* Jump to the bottom */
 664                         } else {
 665                                 value = MIN (value + increment, adjustment->upper - adjustment->page_size);
 666                         }
 667                         break;
 668                 default:
 669                         break;
 670         }
 671
 672         gtk_adjustment_set_value (adjustment, value);
 673 }
 674
 675 static void
 676 ev_view_binding_activated (EvView *view,
 677                            GtkScrollType scroll,
 678                            gboolean horizontal)
 679 {
 680         GtkAdjustment *adjustment;
 681         double value;
 682
 683         if (view->presentation) {
 684                 switch (scroll) {
 685                         case GTK_SCROLL_STEP_BACKWARD:
 686                                 ev_page_cache_prev_page (view->page_cache);
 687                                 break;
 688                         case GTK_SCROLL_STEP_FORWARD:
 689                                 ev_page_cache_next_page (view->page_cache);
 690                                 break;
 691                         default:
 692                                 break;
 693                 }
 694                 return;
 695         }
 696
 697         if (horizontal) {
 698                 adjustment = view->hadjustment;
 699         } else {
 700                 adjustment = view->vadjustment;
 701         }
 702
 703         value = adjustment->value;
 704
 705         switch (scroll) {
 706                 case GTK_SCROLL_STEP_BACKWARD:
 707                         value -= adjustment->step_increment;
 708                         break;
 709                 case GTK_SCROLL_STEP_FORWARD:
 710                         value += adjustment->step_increment;
 711                         break;
 712                 default:
 713                         break;
 714         }
 715
 716         value = CLAMP (value, adjustment->lower,
 717                        adjustment->upper - adjustment->page_size);
 718
 719         gtk_adjustment_set_value (adjustment, value);
 720 }
 721
 722 #define MARGIN 5
 723
 724 static void
 725 ensure_rectangle_is_visible (EvView *view, GdkRectangle *rect)
 726 {
 727         GtkWidget *widget = GTK_WIDGET (view);
 728         GtkAdjustment *adjustment;
 729         int value;
 730
 731         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
 732
 733         adjustment = view->vadjustment;
 734
 735         if (rect->y < adjustment->value) {
 736                 value = MAX (adjustment->lower, rect->y - MARGIN);
 737                 gtk_adjustment_set_value (view->vadjustment, value);
 738         } else if (rect->y + rect->height >
 739                    adjustment->value + widget->allocation.height) {
 740                 value = MIN (adjustment->upper, rect->y + rect->height -
 741                              widget->allocation.height + MARGIN);
 742                 gtk_adjustment_set_value (view->vadjustment, value);
 743         }
 744
 745         adjustment = view->hadjustment;
 746
 747         if (rect->x < adjustment->value) {
 748                 value = MAX (adjustment->lower, rect->x - MARGIN);
 749                 gtk_adjustment_set_value (view->hadjustment, value);
 750         } else if (rect->x + rect->height >
 751                    adjustment->value + widget->allocation.width) {
 752                 value = MIN (adjustment->upper, rect->x + rect->width -
 753                              widget->allocation.width + MARGIN);
 754                 gtk_adjustment_set_value (view->hadjustment, value);
 755         }
 756 }
 757
 758 /*** Geometry computations ***/
 759
 760 static void
 761 compute_border (EvView *view, int width, int height, GtkBorder *border)
 762 {
 763         if (view->presentation) {
 764                 border->left = 0;
 765                 border->right = 0;
 766                 border->top = 0;
 767                 border->bottom = 0;
 768         } else {
 769                 ev_document_misc_get_page_border_size (width, height, border);
 770         }
 771 }
 772
 773 static void
 774 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 775 {
 776         int max_width, offset;
 777         GtkBorder border;
 778
 779         g_return_if_fail (y_offset != NULL);
 780
 781         ev_page_cache_get_max_width (view->page_cache, view->rotation, zoom, &max_width);
 782
 783         compute_border (view, max_width, max_width, &border);
 784
 785         if (view->dual_page) {
 786                 ev_page_cache_get_height_to_page (view->page_cache, page,
 787                                                   view->rotation, zoom, NULL, &offset);
 788                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 789         } else {
 790                 ev_page_cache_get_height_to_page (view->page_cache, page,
 791                                                   view->rotation, zoom, &offset, NULL);
 792                 offset += (page + 1) * view->spacing + page * (border.top + border.bottom);
 793         }
 794
 795         *y_offset = offset;
 796         return;
 797 }
 798
 799 static gboolean
 800 get_page_extents (EvView       *view,
 801                   gint          page,
 802                   GdkRectangle *page_area,
 803                   GtkBorder    *border)
 804 {
 805         GtkWidget *widget;
 806         int width, height;
 807
 808         widget = GTK_WIDGET (view);
 809
 810         /* Get the size of the page */
 811         ev_page_cache_get_size (view->page_cache, page,
 812                                 view->rotation,
 813                                 view->scale,
 814                                 &width, &height);
 815         compute_border (view, width, height, border);
 816         page_area->width = width + border->left + border->right;
 817         page_area->height = height + border->top + border->bottom;
 818
 819         if (view->presentation) {
 820                 page_area->x = (MAX (0, widget->allocation.width - width))/2;
 821                 page_area->y = (MAX (0, widget->allocation.height - height))/2;
 822         } else if (view->continuous) {
 823                 gint max_width;
 824                 gint x, y;
 825
 826                 ev_page_cache_get_max_width (view->page_cache, view->rotation,
 827                                              view->scale, &max_width);
 828                 max_width = max_width + border->left + border->right;
 829                 /* Get the location of the bounding box */
 830                 if (view->dual_page) {
 831                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 832                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 833                         if (page % 2 == 0)
 834                                 x = x + (max_width - width - border->left - border->right);
 835                 } else {
 836                         x = view->spacing;
 837                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 838                 }
 839
 840                 get_page_y_offset (view, page, view->scale, &y);
 841
 842                 page_area->x = x;
 843                 page_area->y = y;
 844         } else {
 845                 gint x, y;
 846                 if (view->dual_page) {
 847                         gint width_2, height_2;
 848                         gint max_width = width;
 849                         gint max_height = height;
 850                         GtkBorder overall_border;
 851                         gint other_page;
 852
 853                         other_page = page ^ 1;
 854
 855                         /* First, we get the bounding box of the two pages */
 856                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 857                                 ev_page_cache_get_size (view->page_cache,
 858                                                         other_page,
 859                                                         view->rotation,
 860                                                         view->scale,
 861                                                         &width_2, &height_2);
 862                                 if (width_2 > width)
 863                                         max_width = width_2;
 864                                 if (height_2 > height)
 865                                         max_height = height_2;
 866                         }
 867                         compute_border (view, max_width, max_height, &overall_border);
 868
 869                         /* Find the offsets */
 870                         x = view->spacing;
 871                         y = view->spacing;
 872
 873                         /* Adjust for being the left or right page */
 874                         if (page % 2 == 0)
 875                                 x = x + max_width - width;
 876                         else
 877                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 878
 879                         y = y + (max_height - height)/2;
 880
 881                         /* Adjust for extra allocation */
 882                         x = x + MAX (0, widget->allocation.width -
 883                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 884                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 885                 } else {
 886                         x = view->spacing;
 887                         y = view->spacing;
 888
 889                         /* Adjust for extra allocation */
 890                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 891                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 892                 }
 893
 894                 page_area->x = x;
 895                 page_area->y = y;
 896         }
 897
 898         return TRUE;
 899 }
 900
 901 static void
 902 view_point_to_doc_point (EvView *view,
 903                          GdkPoint *view_point,
 904                          GdkRectangle *page_area,
 905                          double  *doc_point_x,
 906                          double  *doc_point_y)
 907 {
 908         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 909         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 910 }
 911
 912 static void
 913 view_rect_to_doc_rect (EvView *view,
 914                        GdkRectangle *view_rect,
 915                        GdkRectangle *page_area,
 916                        EvRectangle  *doc_rect)
 917 {
 918         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 919         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 920         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 921         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 922 }
 923
 924 static void
 925 doc_rect_to_view_rect (EvView       *view,
 926                        int           page,
 927                        EvRectangle  *doc_rect,
 928                        GdkRectangle *view_rect)
 929 {
 930         GdkRectangle page_area;
 931         GtkBorder border;
 932         double x, y, w, h;
 933         int width, height;
 934
 935         ev_page_cache_get_size (view->page_cache, page,
 936                                 view->rotation,
 937                                 1.0,
 938                                 &width, &height);
 939
 940         if (view->rotation == 0) {
 941                 x = doc_rect->x1;
 942                 y = doc_rect->y1;
 943                 w = doc_rect->x2 - doc_rect->x1;
 944                 h = doc_rect->y2 - doc_rect->y1;
 945         } else if (view->rotation == 90) {
 946                 x = width - doc_rect->y2;
 947                 y = doc_rect->x1;
 948                 w = doc_rect->y2 - doc_rect->y1;
 949                 h = doc_rect->x2 - doc_rect->x1;
 950         } else if (view->rotation == 180) {
 951                 x = width - doc_rect->x2;
 952                 y = height - doc_rect->y2;
 953                 w = doc_rect->x2 - doc_rect->x1;
 954                 h = doc_rect->y2 - doc_rect->y1;
 955         } else if (view->rotation == 270) {
 956                 x = doc_rect->y1;
 957                 y = height - doc_rect->x2;
 958                 w = doc_rect->y2 - doc_rect->y1;
 959                 h = doc_rect->x2 - doc_rect->x1;
 960         } else {
 961                 g_assert_not_reached ();
 962         }
 963
 964         get_page_extents (view, page, &page_area, &border);
 965
 966         view_rect->x = x * view->scale + page_area.x;
 967         view_rect->y = y * view->scale + page_area.y;
 968         view_rect->width = w * view->scale;
 969         view_rect->height = h * view->scale;
 970 }
 971
 972 static void
 973 find_page_at_location (EvView  *view,
 974                        gdouble  x,
 975                        gdouble  y,
 976                        gint    *page,
 977                        gint    *x_offset,
 978                        gint    *y_offset)
 979 {
 980         int i;
 981
 982         if (view->document == NULL)
 983                 return;
 984
 985         g_assert (page);
 986         g_assert (x_offset);
 987         g_assert (y_offset);
 988
 989         for (i = view->start_page; i <= view->end_page; i++) {
 990                 GdkRectangle page_area;
 991                 GtkBorder border;
 992
 993                 if (! get_page_extents (view, i, &page_area, &border))
 994                         continue;
 995
 996                 if ((x >= page_area.x + border.left) &&
 997                     (x < page_area.x + page_area.width - border.right) &&
 998                     (y >= page_area.y + border.top) &&
 999                     (y < page_area.y + page_area.height - border.bottom)) {
1000                         *page = i;
1001                         *x_offset = x - (page_area.x + border.left);
1002                         *y_offset = y - (page_area.y + border.top);
1003                         return;
1004                 }
1005         }
1006
1007         *page = -1;
1008 }
1009
1010 static void
1011 ev_view_queue_draw_page (EvView *view,
1012                          gint    page)
1013 {
1014         /* FIXME: write */
1015         gtk_widget_queue_draw (GTK_WIDGET (view));
1016 }
1017
1018 static gboolean
1019 location_in_text (EvView  *view,
1020                   gdouble  x,
1021                   gdouble  y)
1022 {
1023         GdkRegion *region;
1024         gint page = -1;
1025         gint x_offset = 0, y_offset = 0;
1026
1027         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1028
1029         if (page == -1)
1030                 return FALSE;
1031
1032         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
1033
1034         if (region)
1035                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
1036         else
1037                 return FALSE;
1038 }
1039
1040 /*** Hyperref ***/
1041 static EvLink *
1042 get_link_at_location (EvView  *view,
1043                       gdouble  x,
1044                       gdouble  y)
1045 {
1046         gint page = -1;
1047         gint x_offset = 0, y_offset = 0;
1048         GList *link_mapping;
1049
1050         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
1051
1052         if (page == -1)
1053                 return NULL;
1054
1055         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
1056
1057         if (link_mapping)
1058                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1059         else
1060                 return NULL;
1061 }
1062
1063 /* FIXME: standardize this sometime */
1064 static void
1065 go_to_link (EvView *view, EvLink *link)
1066 {
1067         EvLinkType type;
1068         const char *uri;
1069         int page;
1070
1071         type = ev_link_get_link_type (link);
1072
1073         switch (type) {
1074                 case EV_LINK_TYPE_TITLE:
1075                         break;
1076                 case EV_LINK_TYPE_PAGE:
1077                         page = ev_link_get_page (link);
1078                         ev_page_cache_set_current_page (view->page_cache, page);
1079                         break;
1080                 case EV_LINK_TYPE_EXTERNAL_URI:
1081                         uri = ev_link_get_uri (link);
1082                         gnome_vfs_url_show (uri);
1083                         break;
1084         }
1085 }
1086
1087 static char *
1088 status_message_from_link (EvView *view, EvLink *link)
1089 {
1090         EvLinkType type;
1091         char *msg = NULL;
1092         char *page_label;
1093
1094         type = ev_link_get_link_type (link);
1095
1096         switch (type) {
1097                 case EV_LINK_TYPE_TITLE:
1098                         if (ev_link_get_title (link))
1099                                 msg = g_strdup (ev_link_get_title (link));
1100                         break;
1101                 case EV_LINK_TYPE_PAGE:
1102                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1103                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1104                         g_free (page_label);
1105                         break;
1106                 case EV_LINK_TYPE_EXTERNAL_URI:
1107                         msg = g_strdup (ev_link_get_uri (link));
1108                         break;
1109                 default:
1110                         break;
1111         }
1112
1113         return msg;
1114 }
1115
1116
1117 /*** GtkWidget implementation ***/
1118
1119 static void
1120 ev_view_size_request_continuous_dual_page (EvView         *view,
1121                                            GtkRequisition *requisition)
1122 {
1123         int max_width;
1124         gint n_pages;
1125         GtkBorder border;
1126
1127         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1128                                      view->scale, &max_width);
1129         compute_border (view, max_width, max_width, &border);
1130
1131         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1132
1133         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1134         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1135
1136         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1137                 requisition->width = 1;
1138         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1139                 requisition->width = 1;
1140                 /* FIXME: This could actually be set on one page docs or docs
1141                  * with a strange aspect ratio. */
1142                 /* requisition->height = 1;*/
1143         }
1144 }
1145
1146 static void
1147 ev_view_size_request_continuous (EvView         *view,
1148                                  GtkRequisition *requisition)
1149 {
1150         int max_width;
1151         int n_pages;
1152         GtkBorder border;
1153
1154
1155         ev_page_cache_get_max_width (view->page_cache, view->rotation,
1156                                      view->scale, &max_width);
1157         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1158         compute_border (view, max_width, max_width, &border);
1159
1160         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1161         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1162
1163         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1164                 requisition->width = 1;
1165         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1166                 requisition->width = 1;
1167                 /* FIXME: This could actually be set on one page docs or docs
1168                  * with a strange aspect ratio. */
1169                 /* requisition->height = 1;*/
1170         }
1171 }
1172
1173 static void
1174 ev_view_size_request_dual_page (EvView         *view,
1175                                 GtkRequisition *requisition)
1176 {
1177         GtkBorder border;
1178         gint width, height;
1179
1180         /* Find the largest of the two. */
1181         ev_page_cache_get_size (view->page_cache,
1182                                 view->current_page,
1183                                 view->rotation,
1184                                 view->scale,
1185                                 &width, &height);
1186         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1187                 gint width_2, height_2;
1188                 ev_page_cache_get_size (view->page_cache,
1189                                         view->current_page + 1,
1190                                         view->rotation,
1191                                         view->scale,
1192                                         &width_2, &height_2);
1193                 if (width_2 > width) {
1194                         width = width_2;
1195                         height = height_2;
1196                 }
1197         }
1198         compute_border (view, width, height, &border);
1199
1200         requisition->width = ((width + border.left + border.right) * 2) +
1201                 (view->spacing * 3);
1202         requisition->height = (height + border.top + border.bottom) +
1203                 (view->spacing * 2);
1204
1205         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1206                 requisition->width = 1;
1207         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1208                 requisition->width = 1;
1209                 requisition->height = 1;
1210         }
1211 }
1212
1213 static void
1214 ev_view_size_request_single_page (EvView         *view,
1215                                   GtkRequisition *requisition)
1216 {
1217         GtkBorder border;
1218         gint width, height;
1219
1220         ev_page_cache_get_size (view->page_cache,
1221                                 view->current_page,
1222                                 view->rotation,
1223                                 view->scale,
1224                                 &width, &height);
1225         compute_border (view, width, height, &border);
1226
1227         requisition->width = width + border.left + border.right + (2 * view->spacing);
1228         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1229
1230         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1231                 requisition->width = 1;
1232                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1233         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1234                 requisition->width = 1;
1235                 requisition->height = 1;
1236         }
1237 }
1238
1239 static void
1240 ev_view_size_request (GtkWidget      *widget,
1241                       GtkRequisition *requisition)
1242 {
1243         EvView *view = EV_VIEW (widget);
1244
1245         if (view->document == NULL) {
1246                 requisition->width = 1;
1247                 requisition->height = 1;
1248                 return;
1249         }
1250
1251         if (view->presentation) {
1252                 requisition->width = 1;
1253                 requisition->height = 1;
1254                 return;
1255         }
1256
1257         if (view->continuous && view->dual_page)
1258                 ev_view_size_request_continuous_dual_page (view, requisition);
1259         else if (view->continuous)
1260                 ev_view_size_request_continuous (view, requisition);
1261         else if (view->dual_page)
1262                 ev_view_size_request_dual_page (view, requisition);
1263         else
1264                 ev_view_size_request_single_page (view, requisition);
1265 }
1266
1267 static void
1268 ev_view_size_allocate (GtkWidget      *widget,
1269                        GtkAllocation  *allocation)
1270 {
1271         EvView *view = EV_VIEW (widget);
1272
1273         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1274                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1275
1276                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1277
1278                 ev_view_size_request (widget, &widget->requisition);
1279         }
1280
1281         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1282         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1283
1284         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1285         view->pending_resize = FALSE;
1286
1287         if (view->document)
1288                 view_update_range_and_current_page (view);
1289
1290         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1291 }
1292
1293 static void
1294 ev_view_realize (GtkWidget *widget)
1295 {
1296         EvView *view = EV_VIEW (widget);
1297         GdkWindowAttr attributes;
1298
1299         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1300
1301
1302         attributes.window_type = GDK_WINDOW_CHILD;
1303         attributes.wclass = GDK_INPUT_OUTPUT;
1304         attributes.visual = gtk_widget_get_visual (widget);
1305         attributes.colormap = gtk_widget_get_colormap (widget);
1306
1307         attributes.x = widget->allocation.x;
1308         attributes.y = widget->allocation.y;
1309         attributes.width = widget->allocation.width;
1310         attributes.height = widget->allocation.height;
1311         attributes.event_mask = GDK_EXPOSURE_MASK |
1312                                 GDK_BUTTON_PRESS_MASK |
1313                                 GDK_BUTTON_RELEASE_MASK |
1314                                 GDK_SCROLL_MASK |
1315                                 GDK_KEY_PRESS_MASK |
1316                                 GDK_POINTER_MOTION_MASK |
1317                                 GDK_LEAVE_NOTIFY_MASK;
1318
1319         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1320                                          &attributes,
1321                                          GDK_WA_X | GDK_WA_Y |
1322                                          GDK_WA_COLORMAP |
1323                                          GDK_WA_VISUAL);
1324         gdk_window_set_user_data (widget->window, widget);
1325         widget->style = gtk_style_attach (widget->style, widget->window);
1326
1327         if (view->presentation)
1328                 gdk_window_set_background (widget->window, &widget->style->black);
1329         else
1330                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1331 }
1332
1333 static void
1334 ev_view_unrealize (GtkWidget *widget)
1335 {
1336         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1337 }
1338
1339 static gboolean
1340 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1341 {
1342         EvView *view = EV_VIEW (widget);
1343
1344         if ((event->state & GDK_CONTROL_MASK) != 0) {
1345
1346                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1347
1348                  if (event->direction == GDK_SCROLL_UP ||
1349                         event->direction == GDK_SCROLL_LEFT) {
1350                             if (ev_view_can_zoom_in (view)) {
1351                                     ev_view_zoom_in (view);
1352                             }
1353                  } else {
1354                             if (ev_view_can_zoom_out (view)) {
1355                                     ev_view_zoom_out (view);
1356                             }
1357                  }
1358                  return TRUE;
1359         }
1360
1361         if ((event->state & GDK_SHIFT_MASK) != 0) {
1362                 if (event->direction == GDK_SCROLL_UP)
1363                         event->direction = GDK_SCROLL_LEFT;
1364                 if (event->direction == GDK_SCROLL_DOWN)
1365                         event->direction = GDK_SCROLL_RIGHT;
1366         }
1367
1368         return FALSE;
1369 }
1370
1371 static EvViewSelection *
1372 find_selection_for_page (EvView *view,
1373                          gint    page)
1374 {
1375         GList *list;
1376
1377         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1378                 EvViewSelection *selection;
1379
1380                 selection = (EvViewSelection *) list->data;
1381
1382                 if (selection->page == page)
1383                         return selection;
1384         }
1385
1386         return NULL;
1387 }
1388
1389 static gboolean
1390 ev_view_expose_event (GtkWidget      *widget,
1391                       GdkEventExpose *event)
1392 {
1393         EvView *view = EV_VIEW (widget);
1394         int i;
1395
1396         if (view->document == NULL)
1397                 return FALSE;
1398
1399         for (i = view->start_page; i <= view->end_page; i++) {
1400                 GdkRectangle page_area;
1401                 GtkBorder border;
1402
1403                 if (!get_page_extents (view, i, &page_area, &border))
1404                         continue;
1405
1406                 page_area.x -= view->scroll_x;
1407                 page_area.y -= view->scroll_y;
1408
1409                 draw_one_page (view, i, &page_area, &border, &(event->area));
1410
1411                 if (EV_IS_DOCUMENT_FIND (view->document))
1412                         highlight_find_results (view, i);
1413         }
1414
1415         return FALSE;
1416 }
1417
1418 static gboolean
1419 ev_view_button_press_event (GtkWidget      *widget,
1420                             GdkEventButton *event)
1421 {
1422         EvView *view = EV_VIEW (widget);
1423
1424         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1425                 gtk_widget_grab_focus (widget);
1426         }
1427
1428         view->pressed_button = event->button;
1429
1430         switch (event->button) {
1431                 case 1:
1432                         if (view->selection_info.selections) {
1433                                 clear_selection (view);
1434                                 gtk_widget_queue_draw (widget);
1435                         }
1436
1437                         view->selection_info.start.x = event->x + view->scroll_x;
1438                         view->selection_info.start.y = event->y + view->scroll_y;
1439                         return TRUE;
1440                 case 2:
1441                         /* use root coordinates as reference point because
1442                          * scrolling changes window relative coordinates */
1443                         view->drag_info.start.x = event->x_root;
1444                         view->drag_info.start.y = event->y_root;
1445                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1446                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1447
1448                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1449
1450                         return TRUE;
1451         }
1452
1453         return FALSE;
1454 }
1455
1456
1457 static gboolean
1458 selection_update_idle_cb (EvView *view)
1459 {
1460         GdkPoint point;
1461         point.x = view->motion_x;
1462         point.y = view->motion_y;
1463         compute_selections (view, &view->selection_info.start, &point);
1464
1465         view->selection_update_id = 0;
1466         return FALSE;
1467 }
1468
1469 static gboolean
1470 ev_view_motion_notify_event (GtkWidget      *widget,
1471                              GdkEventMotion *event)
1472 {
1473         EvView *view = EV_VIEW (widget);
1474
1475         if (!view->document)
1476                 return FALSE;
1477
1478         if (view->pressed_button == 1) {
1479                 view->selection_info.in_selection = TRUE;
1480                 view->motion_x = event->x + view->scroll_x;
1481                 view->motion_y = event->y + view->scroll_y;
1482
1483                 /* Queue an idle to handle the motion.  We do this because
1484                  * handling any selection events in the motion is probably going
1485                  * to be slower than new motion events reach us.  This means that */
1486
1487                 if (! view->selection_update_id)
1488                         view->selection_update_id = g_idle_add ((GSourceFunc)selection_update_idle_cb, view);
1489
1490                 return TRUE;
1491         } else if (view->pressed_button == 2) {
1492                 if (!view->drag_info.in_drag) {
1493                         gboolean start;
1494
1495                         start = gtk_drag_check_threshold (widget,
1496                                                           view->drag_info.start.x,
1497                                                           view->drag_info.start.y,
1498                                                           event->x_root,
1499                                                           event->y_root);
1500                         view->drag_info.in_drag = start;
1501                 }
1502
1503                 if (view->drag_info.in_drag) {
1504                         int dx, dy;
1505                         gdouble dhadj_value, dvadj_value;
1506
1507                         dx = event->x_root - view->drag_info.start.x;
1508                         dy = event->y_root - view->drag_info.start.y;
1509
1510                         dhadj_value = view->hadjustment->page_size *
1511                                       (gdouble)dx / widget->allocation.width;
1512                         dvadj_value = view->vadjustment->page_size *
1513                                       (gdouble)dy / widget->allocation.height;
1514
1515                         /* clamp scrolling to visible area */
1516                         gtk_adjustment_set_value (view->hadjustment,
1517                                                   MIN(view->drag_info.hadj - dhadj_value,
1518                                                       view->hadjustment->upper -
1519                                                       view->hadjustment->page_size));
1520                         gtk_adjustment_set_value (view->vadjustment,
1521                                                   MIN(view->drag_info.vadj - dvadj_value,
1522                                                       view->vadjustment->upper -
1523                                                       view->vadjustment->page_size));
1524
1525                         return TRUE;
1526                 }
1527         } else if (view->pressed_button <= 0) {
1528                 EvLink *link;
1529
1530                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1531                 if (link) {
1532                         char *msg;
1533
1534                         msg = status_message_from_link (view, link);
1535                         ev_view_set_status (view, msg);
1536                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1537                         g_free (msg);
1538                 } else if (location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y)) {
1539                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1540                 } else {
1541                         ev_view_set_status (view, NULL);
1542                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1543                             view->cursor == EV_VIEW_CURSOR_IBEAM)
1544                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1545                 }
1546                 return TRUE;
1547         }
1548
1549         return FALSE;
1550 }
1551
1552 static gboolean
1553 ev_view_button_release_event (GtkWidget      *widget,
1554                               GdkEventButton *event)
1555 {
1556         EvView *view = EV_VIEW (widget);
1557
1558         if (view->pressed_button == 2) {
1559                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1560         }
1561
1562         view->pressed_button = -1;
1563         view->drag_info.in_drag = FALSE;
1564
1565         if (view->selection_info.selections) {
1566                 ev_view_update_primary_selection (view);
1567         } else if (view->document) {
1568                 EvLink *link;
1569
1570                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1571                 if (link) {
1572                         go_to_link (view, link);
1573                 }
1574         }
1575
1576         return FALSE;
1577 }
1578
1579 static gint
1580 ev_view_focus_in (GtkWidget     *widget,
1581                   GdkEventFocus *event)
1582 {
1583         if (EV_VIEW (widget)->pixbuf_cache)
1584                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1585         gtk_widget_queue_draw (widget);
1586
1587         return FALSE;
1588 }
1589
1590 static gint
1591 ev_view_focus_out (GtkWidget     *widget,
1592                      GdkEventFocus *event)
1593 {
1594         if (EV_VIEW (widget)->pixbuf_cache)
1595                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1596         gtk_widget_queue_draw (widget);
1597
1598         return FALSE;
1599 }
1600
1601 static gboolean
1602 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1603 {
1604         EvView *view = EV_VIEW (widget);
1605
1606         ev_view_set_status (view, NULL);
1607
1608         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1609             view->cursor == EV_VIEW_CURSOR_IBEAM)
1610                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1611
1612         return FALSE;
1613 }
1614
1615 static void
1616 ev_view_style_set (GtkWidget *widget,
1617                    GtkStyle  *old_style)
1618 {
1619         if (EV_VIEW (widget)->pixbuf_cache)
1620                 ev_pixbuf_cache_style_changed (EV_VIEW (widget)->pixbuf_cache);
1621
1622         GTK_WIDGET_CLASS (ev_view_parent_class)->style_set (widget, old_style);
1623 }
1624
1625
1626 /*** Drawing ***/
1627
1628 static guint32
1629 ev_gdk_color_to_rgb (const GdkColor *color)
1630 {
1631   guint32 result;
1632   result = (0xff0000 | (color->red & 0xff00));
1633   result <<= 8;
1634   result |= ((color->green & 0xff00) | (color->blue >> 8));
1635   return result;
1636 }
1637
1638 static void
1639 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1640                  const GdkRectangle *rect, guchar alpha)
1641 {
1642         GdkGC *gc;
1643         GdkPixbuf *pixbuf;
1644         GdkColor *fill_color_gdk;
1645         guint fill_color;
1646
1647         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1648         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1649
1650         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1651                                  rect->width, rect->height);
1652         gdk_pixbuf_fill (pixbuf, fill_color);
1653
1654         gdk_draw_pixbuf (window, NULL, pixbuf,
1655                          0, 0,
1656                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1657                          rect->width, rect->height,
1658                          GDK_RGB_DITHER_NONE,
1659                          0, 0);
1660
1661         g_object_unref (pixbuf);
1662
1663         gc = gdk_gc_new (window);
1664         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1665         gdk_draw_rectangle (window, gc, FALSE,
1666                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1667                             rect->width - 1,
1668                             rect->height - 1);
1669         g_object_unref (gc);
1670
1671         gdk_color_free (fill_color_gdk);
1672 }
1673
1674
1675 static void
1676 highlight_find_results (EvView *view, int page)
1677 {
1678         EvDocumentFind *find;
1679         int i, results = 0;
1680
1681         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1682
1683         find = EV_DOCUMENT_FIND (view->document);
1684
1685         results = ev_document_find_get_n_results (find, page);
1686
1687         for (i = 0; i < results; i++) {
1688                 EvRectangle rectangle;
1689                 GdkRectangle view_rectangle;
1690                 guchar alpha;
1691
1692                 if (i == view->find_result && page == view->find_page) {
1693                         alpha = 0x90;
1694                 } else {
1695                         alpha = 0x20;
1696                 }
1697
1698                 ev_document_find_get_result (find, page,
1699                                              i, &rectangle);
1700                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1701                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1702                                  &view_rectangle, alpha);
1703         }
1704 }
1705
1706 static void
1707 draw_one_page (EvView          *view,
1708                gint             page,
1709                GdkRectangle    *page_area,
1710                GtkBorder       *border,
1711                GdkRectangle    *expose_area)
1712 {
1713         gint width, height;
1714         GdkPixbuf *current_pixbuf;
1715         GdkRectangle overlap;
1716         GdkRectangle real_page_area;
1717         EvViewSelection *selection;
1718
1719         g_assert (view->document);
1720         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1721                 return;
1722
1723         selection = find_selection_for_page (view, page);
1724         ev_page_cache_get_size (view->page_cache,
1725                                 page, view->rotation,
1726                                 view->scale,
1727                                 &width, &height);
1728         /* Render the document itself */
1729         real_page_area = *page_area;
1730
1731         real_page_area.x += border->left;
1732         real_page_area.y += border->top;
1733         real_page_area.width -= (border->left + border->right);
1734         real_page_area.height -= (border->top + border->bottom);
1735
1736         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1737                                          GTK_WIDGET (view),
1738                                          page_area, border);
1739
1740         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1741                 GdkPixbuf *selection_pixbuf = NULL;
1742                 GdkPixbuf *scaled_image;
1743                 GdkPixbuf *scaled_selection;
1744
1745                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1746
1747                 /* Get the selection pixbuf iff we have something to draw */
1748                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
1749                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
1750                                                                                  page,
1751                                                                                  view->scale,
1752                                                                                  NULL);
1753
1754                 if (current_pixbuf == NULL)
1755                         scaled_image = NULL;
1756                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1757                          height == gdk_pixbuf_get_height (current_pixbuf))
1758                         scaled_image = g_object_ref (current_pixbuf);
1759                 else
1760                         /* FIXME: We don't want to scale the whole area, just the right
1761                          * area of it */
1762                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1763                                                                 width, height,
1764                                                                 GDK_INTERP_NEAREST);
1765
1766                 if (selection_pixbuf == NULL)
1767                         scaled_selection = NULL;
1768                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
1769                          height == gdk_pixbuf_get_height (selection_pixbuf))
1770                         scaled_selection = g_object_ref (selection_pixbuf);
1771                 else
1772                         /* FIXME: We don't want to scale the whole area, just the right
1773                          * area of it */
1774                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
1775                                                                     width, height,
1776                                                                     GDK_INTERP_NEAREST);
1777
1778                 if (scaled_image) {
1779                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1780                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1781                                          scaled_image,
1782                                          overlap.x - real_page_area.x,
1783                                          overlap.y - real_page_area.y,
1784                                          overlap.x, overlap.y,
1785                                          overlap.width, overlap.height,
1786                                          GDK_RGB_DITHER_NORMAL,
1787                                          0, 0);
1788                         g_object_unref (scaled_image);
1789                 }
1790
1791                 if (scaled_selection) {
1792                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1793                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1794                                          scaled_selection,
1795                                          overlap.x - real_page_area.x,
1796                                          overlap.y - real_page_area.y,
1797                                          overlap.x, overlap.y,
1798                                          overlap.width, overlap.height,
1799                                          GDK_RGB_DITHER_NORMAL,
1800                                          0, 0);
1801                         g_object_unref (scaled_selection);
1802                 }
1803         }
1804 }
1805
1806 /*** GObject functions ***/
1807
1808 static void
1809 ev_view_finalize (GObject *object)
1810 {
1811         EvView *view = EV_VIEW (object);
1812
1813         LOG ("Finalize");
1814
1815         g_free (view->status);
1816         g_free (view->find_status);
1817
1818         clear_selection (view);
1819
1820         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1821 }
1822
1823 static void
1824 ev_view_destroy (GtkObject *object)
1825 {
1826         EvView *view = EV_VIEW (object);
1827
1828         if (view->document) {
1829                 g_object_unref (view->document);
1830                 view->document = NULL;
1831         }
1832         if (view->pixbuf_cache) {
1833                 g_object_unref (view->pixbuf_cache);
1834                 view->pixbuf_cache = NULL;
1835         }
1836         ev_view_set_scroll_adjustments (view, NULL, NULL);
1837
1838         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1839 }
1840
1841 static void
1842 ev_view_set_property (GObject      *object,
1843                       guint         prop_id,
1844                       const GValue *value,
1845                       GParamSpec   *pspec)
1846 {
1847         EvView *view = EV_VIEW (object);
1848
1849         switch (prop_id)
1850         {
1851         case PROP_CONTINUOUS:
1852                 ev_view_set_continuous (view, g_value_get_boolean (value));
1853                 break;
1854         case PROP_DUAL_PAGE:
1855                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1856                 break;
1857         case PROP_FULLSCREEN:
1858                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1859                 break;
1860         case PROP_PRESENTATION:
1861                 ev_view_set_presentation (view, g_value_get_boolean (value));
1862                 break;
1863         case PROP_SIZING_MODE:
1864                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1865                 break;
1866         case PROP_ZOOM:
1867                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1868                 break;
1869         default:
1870                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1871         }
1872 }
1873
1874 static void
1875 ev_view_get_property (GObject *object,
1876                       guint prop_id,
1877                       GValue *value,
1878                       GParamSpec *pspec)
1879 {
1880         EvView *view = EV_VIEW (object);
1881
1882         switch (prop_id)
1883         {
1884         case PROP_STATUS:
1885                 g_value_set_string (value, view->status);
1886                 break;
1887         case PROP_FIND_STATUS:
1888                 g_value_set_string (value, view->status);
1889                 break;
1890         case PROP_CONTINUOUS:
1891                 g_value_set_boolean (value, view->continuous);
1892                 break;
1893         case PROP_DUAL_PAGE:
1894                 g_value_set_boolean (value, view->dual_page);
1895                 break;
1896         case PROP_FULLSCREEN:
1897                 g_value_set_boolean (value, view->fullscreen);
1898                 break;
1899         case PROP_PRESENTATION:
1900                 g_value_set_boolean (value, view->presentation);
1901                 break;
1902         case PROP_SIZING_MODE:
1903                 g_value_set_enum (value, view->sizing_mode);
1904                 break;
1905         case PROP_ZOOM:
1906                 g_value_set_double (value, view->scale);
1907                 break;
1908         default:
1909                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1910         }
1911 }
1912
1913 static void
1914 ev_view_class_init (EvViewClass *class)
1915 {
1916         GObjectClass *object_class = G_OBJECT_CLASS (class);
1917         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1918         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1919         GtkBindingSet *binding_set;
1920
1921         object_class->finalize = ev_view_finalize;
1922         object_class->set_property = ev_view_set_property;
1923         object_class->get_property = ev_view_get_property;
1924
1925         widget_class->expose_event = ev_view_expose_event;
1926         widget_class->button_press_event = ev_view_button_press_event;
1927         widget_class->motion_notify_event = ev_view_motion_notify_event;
1928         widget_class->button_release_event = ev_view_button_release_event;
1929         widget_class->focus_in_event = ev_view_focus_in;
1930         widget_class->focus_out_event = ev_view_focus_out;
1931         widget_class->size_request = ev_view_size_request;
1932         widget_class->size_allocate = ev_view_size_allocate;
1933         widget_class->realize = ev_view_realize;
1934         widget_class->unrealize = ev_view_unrealize;
1935         widget_class->scroll_event = ev_view_scroll_event;
1936         widget_class->leave_notify_event = ev_view_leave_notify_event;
1937         widget_class->style_set = ev_view_style_set;
1938         gtk_object_class->destroy = ev_view_destroy;
1939
1940         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1941         class->binding_activated = ev_view_binding_activated;
1942
1943         widget_class->set_scroll_adjustments_signal =
1944             g_signal_new ("set-scroll-adjustments",
1945                           G_OBJECT_CLASS_TYPE (object_class),
1946                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1947                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1948                           NULL, NULL,
1949                           ev_marshal_VOID__OBJECT_OBJECT,
1950                           G_TYPE_NONE, 2,
1951                           GTK_TYPE_ADJUSTMENT,
1952                           GTK_TYPE_ADJUSTMENT);
1953
1954         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
1955                          G_TYPE_FROM_CLASS (object_class),
1956                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1957                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
1958                          NULL, NULL,
1959                          ev_marshal_VOID__ENUM_BOOLEAN,
1960                          G_TYPE_NONE, 2,
1961                          GTK_TYPE_SCROLL_TYPE,
1962                          G_TYPE_BOOLEAN);
1963
1964         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1965                          G_TYPE_FROM_CLASS (object_class),
1966                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1967                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1968                          NULL, NULL,
1969                          ev_marshal_VOID__VOID,
1970                          G_TYPE_NONE, 0, G_TYPE_NONE);
1971
1972         g_object_class_install_property (object_class,
1973                                          PROP_STATUS,
1974                                          g_param_spec_string ("status",
1975                                                               "Status Message",
1976                                                               "The status message",
1977                                                               NULL,
1978                                                               G_PARAM_READABLE));
1979
1980         g_object_class_install_property (object_class,
1981                                          PROP_FIND_STATUS,
1982                                          g_param_spec_string ("find-status",
1983                                                               "Find Status Message",
1984                                                               "The find status message",
1985                                                               NULL,
1986                                                               G_PARAM_READABLE));
1987
1988         g_object_class_install_property (object_class,
1989                                          PROP_CONTINUOUS,
1990                                          g_param_spec_boolean ("continuous",
1991                                                                "Continuous",
1992                                                                "Continuous scrolling mode",
1993                                                                TRUE,
1994                                                                G_PARAM_READWRITE));
1995
1996         g_object_class_install_property (object_class,
1997                                          PROP_DUAL_PAGE,
1998                                          g_param_spec_boolean ("dual-page",
1999                                                                "Dual Page",
2000                                                                "Two pages visible at once",
2001                                                                FALSE,
2002                                                                G_PARAM_READWRITE));
2003         g_object_class_install_property (object_class,
2004                                          PROP_FULLSCREEN,
2005                                          g_param_spec_boolean ("fullscreen",
2006                                                                "Full Screen",
2007                                                                "Draw page in a fullscreen fashion",
2008                                                                FALSE,
2009                                                                G_PARAM_READWRITE));
2010         g_object_class_install_property (object_class,
2011                                          PROP_PRESENTATION,
2012                                          g_param_spec_boolean ("presentation",
2013                                                                "Presentation",
2014                                                                "Draw page in presentation mode",
2015                                                                TRUE,
2016                                                                G_PARAM_READWRITE));
2017
2018         g_object_class_install_property (object_class,
2019                                          PROP_SIZING_MODE,
2020                                          g_param_spec_enum ("sizing-mode",
2021                                                             "Sizing Mode",
2022                                                             "Sizing Mode",
2023                                                             EV_TYPE_SIZING_MODE,
2024                                                             EV_SIZING_FIT_WIDTH,
2025                                                             G_PARAM_READWRITE));
2026
2027         g_object_class_install_property (object_class,
2028                                          PROP_ZOOM,
2029                                          g_param_spec_double ("zoom",
2030                                                               "Zoom factor",
2031                                                                "Zoom factor",
2032                                                                MIN_SCALE,
2033                                                                MAX_SCALE,
2034                                                                1.0,
2035                                                                G_PARAM_READWRITE));
2036
2037         binding_set = gtk_binding_set_by_class (class);
2038
2039         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
2040         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
2041         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
2042         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
2043 }
2044
2045 static void
2046 ev_view_init (EvView *view)
2047 {
2048         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
2049
2050         view->spacing = 5;
2051         view->scale = 1.0;
2052         view->current_page = 0;
2053         view->pressed_button = -1;
2054         view->cursor = EV_VIEW_CURSOR_NORMAL;
2055         view->drag_info.in_drag = FALSE;
2056         view->selection_info.in_selection = FALSE;
2057
2058         view->selection_mode = EV_VIEW_SELECTION_TEXT;
2059         view->continuous = TRUE;
2060         view->dual_page = FALSE;
2061         view->presentation = FALSE;
2062         view->fullscreen = FALSE;
2063         view->sizing_mode = EV_SIZING_FIT_WIDTH;
2064         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
2065 }
2066
2067 /*** Callbacks ***/
2068
2069 static void
2070 find_changed_cb (EvDocument *document, int page, EvView *view)
2071 {
2072         jump_to_find_page (view, EV_VIEW_FIND_NEXT);
2073         jump_to_find_result (view);
2074         update_find_status_message (view);
2075
2076         if (view->current_page == page)
2077                 gtk_widget_queue_draw (GTK_WIDGET (view));
2078 }
2079
2080 static void
2081 job_finished_cb (EvPixbufCache *pixbuf_cache,
2082                  EvView        *view)
2083 {
2084         gtk_widget_queue_draw (GTK_WIDGET (view));
2085 }
2086
2087 static void
2088 page_changed_cb (EvPageCache *page_cache,
2089                  int          new_page,
2090                  EvView      *view)
2091 {
2092         if (view->current_page != new_page) {
2093
2094                 view->current_page = new_page;
2095                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2096                 gtk_widget_queue_resize (GTK_WIDGET (view));
2097
2098                 if (EV_IS_DOCUMENT_FIND (view->document)) {
2099                         view->find_page = new_page;
2100                         view->find_result = 0;
2101                         update_find_status_message (view);
2102                 }
2103         }
2104 }
2105
2106 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
2107                                          EvView *view)
2108 {
2109         int dx = 0, dy = 0;
2110
2111         if (! GTK_WIDGET_REALIZED (view))
2112                 return;
2113
2114         if (view->hadjustment) {
2115                 dx = view->scroll_x - (int) view->hadjustment->value;
2116                 view->scroll_x = (int) view->hadjustment->value;
2117         } else {
2118                 view->scroll_x = 0;
2119         }
2120
2121         if (view->vadjustment) {
2122                 dy = view->scroll_y - (int) view->vadjustment->value;
2123                 view->scroll_y = (int) view->vadjustment->value;
2124         } else {
2125                 view->scroll_y = 0;
2126         }
2127
2128
2129         if (view->pending_resize)
2130                 gtk_widget_queue_draw (GTK_WIDGET (view));
2131         else
2132                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2133
2134
2135         if (view->document)
2136                 view_update_range_and_current_page (view);
2137 }
2138
2139 GtkWidget*
2140 ev_view_new (void)
2141 {
2142         GtkWidget *view;
2143
2144         view = g_object_new (EV_TYPE_VIEW, NULL);
2145
2146         return view;
2147 }
2148
2149 static void
2150 setup_caches (EvView *view)
2151 {
2152         view->page_cache = ev_page_cache_get (view->document);
2153         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2154         view->pixbuf_cache = ev_pixbuf_cache_new (GTK_WIDGET (view), view->document);
2155         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2156 }
2157
2158 static void
2159 clear_caches (EvView *view)
2160 {
2161         if (view->pixbuf_cache) {
2162                 g_object_unref (view->pixbuf_cache);
2163                 view->pixbuf_cache = NULL;
2164         }
2165
2166         if (view->page_cache) {
2167                 g_object_unref (view->page_cache);
2168                 view->page_cache = NULL;
2169         }
2170 }
2171
2172 void
2173 ev_view_set_document (EvView     *view,
2174                       EvDocument *document)
2175 {
2176         g_return_if_fail (EV_IS_VIEW (view));
2177
2178         if (document != view->document) {
2179                 clear_caches (view);
2180
2181                 if (view->document) {
2182                         g_signal_handlers_disconnect_by_func (view->document,
2183                                                               find_changed_cb,
2184                                                               view);
2185                         g_object_unref (view->document);
2186                         view->page_cache = NULL;
2187
2188                 }
2189
2190                 view->document = document;
2191                 view->find_page = 0;
2192                 view->find_result = 0;
2193
2194                 if (view->document) {
2195                         g_object_ref (view->document);
2196                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2197                                 g_signal_connect (view->document,
2198                                                   "find_changed",
2199                                                   G_CALLBACK (find_changed_cb),
2200                                                   view);
2201                         }
2202
2203                         setup_caches (view);
2204                 }
2205
2206                 gtk_widget_queue_resize (GTK_WIDGET (view));
2207         }
2208 }
2209
2210 /*** Zoom and sizing mode ***/
2211
2212 #define EPSILON 0.0000001
2213 void
2214 ev_view_set_zoom (EvView   *view,
2215                   double    factor,
2216                   gboolean  relative)
2217 {
2218         double scale;
2219
2220         if (relative)
2221                 scale = view->scale * factor;
2222         else
2223                 scale = factor;
2224
2225         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2226
2227         if (ABS (view->scale - scale) < EPSILON)
2228                 return;
2229
2230         view->scale = scale;
2231         view->pending_resize = TRUE;
2232
2233         gtk_widget_queue_resize (GTK_WIDGET (view));
2234
2235         g_object_notify (G_OBJECT (view), "zoom");
2236 }
2237
2238 double
2239 ev_view_get_zoom (EvView *view)
2240 {
2241         return view->scale;
2242 }
2243
2244 gboolean
2245 ev_view_get_continuous (EvView *view)
2246 {
2247         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2248
2249         return view->continuous;
2250 }
2251
2252 void
2253 ev_view_set_continuous (EvView   *view,
2254                         gboolean  continuous)
2255 {
2256         g_return_if_fail (EV_IS_VIEW (view));
2257
2258         continuous = continuous != FALSE;
2259
2260         if (view->continuous != continuous) {
2261                 view->continuous = continuous;
2262                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2263                 gtk_widget_queue_resize (GTK_WIDGET (view));
2264         }
2265
2266         g_object_notify (G_OBJECT (view), "continuous");
2267 }
2268
2269 gboolean
2270 ev_view_get_dual_page (EvView *view)
2271 {
2272         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2273
2274         return view->dual_page;
2275 }
2276
2277 void
2278 ev_view_set_dual_page (EvView   *view,
2279                        gboolean  dual_page)
2280 {
2281         g_return_if_fail (EV_IS_VIEW (view));
2282
2283         dual_page = dual_page != FALSE;
2284
2285         if (view->dual_page == dual_page)
2286                 return;
2287
2288         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2289         view->dual_page = dual_page;
2290         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2291          * preload_cache_size to be 2 if dual_page is set.
2292          */
2293         gtk_widget_queue_resize (GTK_WIDGET (view));
2294
2295         g_object_notify (G_OBJECT (view), "dual-page");
2296 }
2297
2298 void
2299 ev_view_set_fullscreen (EvView   *view,
2300                          gboolean  fullscreen)
2301 {
2302         g_return_if_fail (EV_IS_VIEW (view));
2303
2304         fullscreen = fullscreen != FALSE;
2305
2306         if (view->fullscreen == fullscreen)
2307                 return;
2308
2309         view->fullscreen = fullscreen;
2310         gtk_widget_queue_resize (GTK_WIDGET (view));
2311
2312         g_object_notify (G_OBJECT (view), "fullscreen");
2313 }
2314
2315 gboolean
2316 ev_view_get_fullscreen (EvView *view)
2317 {
2318         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2319
2320         return view->fullscreen;
2321 }
2322
2323 void
2324 ev_view_set_presentation (EvView   *view,
2325                           gboolean  presentation)
2326 {
2327         g_return_if_fail (EV_IS_VIEW (view));
2328
2329         presentation = presentation != FALSE;
2330
2331         if (view->presentation == presentation)
2332                 return;
2333
2334         view->presentation = presentation;
2335         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2336         gtk_widget_queue_resize (GTK_WIDGET (view));
2337
2338         if (GTK_WIDGET_REALIZED (view)) {
2339                 if (view->presentation)
2340                         gdk_window_set_background (GTK_WIDGET(view)->window,
2341                                                    &GTK_WIDGET (view)->style->black);
2342                 else
2343                         gdk_window_set_background (GTK_WIDGET(view)->window,
2344                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2345         }
2346
2347
2348         g_object_notify (G_OBJECT (view), "presentation");
2349 }
2350
2351 gboolean
2352 ev_view_get_presentation (EvView *view)
2353 {
2354         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2355
2356         return view->presentation;
2357 }
2358
2359 void
2360 ev_view_set_sizing_mode (EvView       *view,
2361                          EvSizingMode  sizing_mode)
2362 {
2363         g_return_if_fail (EV_IS_VIEW (view));
2364
2365         if (view->sizing_mode == sizing_mode)
2366                 return;
2367
2368         view->sizing_mode = sizing_mode;
2369         gtk_widget_queue_resize (GTK_WIDGET (view));
2370
2371         g_object_notify (G_OBJECT (view), "sizing-mode");
2372 }
2373
2374 EvSizingMode
2375 ev_view_get_sizing_mode (EvView *view)
2376 {
2377         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2378
2379         return view->sizing_mode;
2380 }
2381
2382 gboolean
2383 ev_view_can_zoom_in (EvView *view)
2384 {
2385         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2386 }
2387
2388 gboolean
2389 ev_view_can_zoom_out (EvView *view)
2390 {
2391         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2392 }
2393
2394 void
2395 ev_view_zoom_in (EvView *view)
2396 {
2397         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2398
2399         view->pending_scroll = SCROLL_TO_CENTER;
2400         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2401 }
2402
2403 void
2404 ev_view_zoom_out (EvView *view)
2405 {
2406         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2407
2408         view->pending_scroll = SCROLL_TO_CENTER;
2409         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2410 }
2411
2412 static void
2413 ev_view_set_rotation (EvView *view, int rotation)
2414 {
2415         view->rotation = rotation;
2416
2417         ev_pixbuf_cache_clear (view->pixbuf_cache);
2418         gtk_widget_queue_resize (GTK_WIDGET (view));
2419 }
2420
2421 void
2422 ev_view_rotate_right (EvView *view)
2423 {
2424         int rotation = view->rotation + 90;
2425
2426         if (rotation >= 360) {
2427                 rotation -= 360;
2428         }
2429
2430         ev_view_set_rotation (view, rotation);
2431 }
2432
2433 void
2434 ev_view_rotate_left (EvView *view)
2435 {
2436         int rotation = view->rotation - 90;
2437
2438         if (rotation < 0) {
2439                 rotation += 360;
2440         }
2441
2442         ev_view_set_rotation (view, rotation);
2443 }
2444
2445 static double
2446 zoom_for_size_fit_width (int doc_width,
2447                          int doc_height,
2448                          int target_width,
2449                          int target_height,
2450                          int vsb_width)
2451 {
2452         double scale;
2453
2454         scale = (double)target_width / doc_width;
2455
2456         if (doc_height * scale > target_height)
2457                 scale = (double) (target_width - vsb_width) / doc_width;
2458
2459         return scale;
2460 }
2461
2462 static double
2463 zoom_for_size_best_fit (int doc_width,
2464                         int doc_height,
2465                         int target_width,
2466                         int target_height,
2467                         int vsb_width,
2468                         int hsb_width)
2469 {
2470         double w_scale;
2471         double h_scale;
2472
2473         w_scale = (double)target_width / doc_width;
2474         h_scale = (double)target_height / doc_height;
2475
2476         if (doc_height * w_scale > target_height)
2477                 w_scale = (double) (target_width - vsb_width) / doc_width;
2478         if (doc_width * h_scale > target_width)
2479                 h_scale = (double) (target_height - hsb_width) / doc_height;
2480
2481         return MIN (w_scale, h_scale);
2482 }
2483
2484
2485 static void
2486 ev_view_zoom_for_size_presentation (EvView *view,
2487                                     int     width,
2488                                     int     height)
2489 {
2490         int doc_width, doc_height;
2491         gdouble scale;
2492
2493         ev_page_cache_get_size (view->page_cache,
2494                                 view->current_page,
2495                                 view->rotation,
2496                                 1.0,
2497                                 &doc_width,
2498                                 &doc_height);
2499         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2500         ev_view_set_zoom (view, scale, FALSE);
2501 }
2502
2503 static void
2504 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2505                            int     width,
2506                            int     height,
2507                            int     vsb_width,
2508                            int     hsb_height)
2509 {
2510         int doc_width, doc_height;
2511         GtkBorder border;
2512         gdouble scale;
2513
2514         ev_page_cache_get_max_width (view->page_cache,
2515                                      view->rotation,
2516                                      1.0,
2517                                      &doc_width);
2518         ev_page_cache_get_max_height (view->page_cache,
2519                                       view->rotation,
2520                                       1.0,
2521                                       &doc_height);
2522         compute_border (view, doc_width, doc_height, &border);
2523
2524         doc_width = doc_width * 2;
2525         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2526         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2527
2528         /* FIXME: We really need to calculate the overall height here, not the
2529          * page height.  We assume there's always a vertical scrollbar for
2530          * now.  We need to fix this. */
2531         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2532                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2533         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2534                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2535         else
2536                 g_assert_not_reached ();
2537
2538         ev_view_set_zoom (view, scale, FALSE);
2539 }
2540
2541 static void
2542 ev_view_zoom_for_size_continuous (EvView *view,
2543                                   int     width,
2544                                   int     height,
2545                                   int     vsb_width,
2546                                   int     hsb_height)
2547 {
2548         int doc_width, doc_height;
2549         GtkBorder border;
2550         gdouble scale;
2551
2552         ev_page_cache_get_max_width (view->page_cache,
2553                                      view->rotation,
2554                                      1.0,
2555                                      &doc_width);
2556         ev_page_cache_get_max_height (view->page_cache,
2557                                       view->rotation,
2558                                       1.0,
2559                                       &doc_height);
2560         compute_border (view, doc_width, doc_height, &border);
2561
2562         width -= (border.left + border.right + 2 * view->spacing);
2563         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2564
2565         /* FIXME: We really need to calculate the overall height here, not the
2566          * page height.  We assume there's always a vertical scrollbar for
2567          * now.  We need to fix this. */
2568         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2569                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2570         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2571                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2572         else
2573                 g_assert_not_reached ();
2574
2575         ev_view_set_zoom (view, scale, FALSE);
2576 }
2577
2578 static void
2579 ev_view_zoom_for_size_dual_page (EvView *view,
2580                                  int     width,
2581                                  int     height,
2582                                  int     vsb_width,
2583                                  int     hsb_height)
2584 {
2585         GtkBorder border;
2586         gint doc_width, doc_height;
2587         gdouble scale;
2588         gint other_page;
2589
2590         other_page = view->current_page ^ 1;
2591
2592         /* Find the largest of the two. */
2593         ev_page_cache_get_size (view->page_cache,
2594                                 view->current_page,
2595                                 view->rotation,
2596                                 1.0,
2597                                 &doc_width, &doc_height);
2598
2599         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2600                 gint width_2, height_2;
2601                 ev_page_cache_get_size (view->page_cache,
2602                                         other_page,
2603                                         view->rotation,
2604                                         1.0,
2605                                         &width_2, &height_2);
2606                 if (width_2 > doc_width)
2607                         doc_width = width_2;
2608                 if (height_2 > doc_height)
2609                         doc_height = height_2;
2610         }
2611         compute_border (view, doc_width, doc_height, &border);
2612
2613         doc_width = doc_width * 2;
2614         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2615         height -= (border.top + border.bottom + 2 * view->spacing);
2616
2617         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2618                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2619         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2620                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2621         else
2622                 g_assert_not_reached ();
2623
2624         ev_view_set_zoom (view, scale, FALSE);
2625 }
2626
2627 static void
2628 ev_view_zoom_for_size_single_page (EvView *view,
2629                                    int     width,
2630                                    int     height,
2631                                    int     vsb_width,
2632                                    int     hsb_height)
2633 {
2634         int doc_width, doc_height;
2635         GtkBorder border;
2636         gdouble scale;
2637
2638         ev_page_cache_get_size (view->page_cache,
2639                                 view->current_page,
2640                                 view->rotation,
2641                                 1.0,
2642                                 &doc_width,
2643                                 &doc_height);
2644         /* Get an approximate border */
2645         compute_border (view, width, height, &border);
2646
2647         width -= (border.left + border.right + 2 * view->spacing);
2648         height -= (border.top + border.bottom + 2 * view->spacing);
2649
2650         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2651                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2652         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2653                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2654         else
2655                 g_assert_not_reached ();
2656
2657         ev_view_set_zoom (view, scale, FALSE);
2658 }
2659
2660 void
2661 ev_view_set_zoom_for_size (EvView *view,
2662                            int     width,
2663                            int     height,
2664                            int     vsb_width,
2665                            int     hsb_height)
2666 {
2667         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2668                           view->sizing_mode == EV_SIZING_BEST_FIT);
2669         g_return_if_fail (width >= 0);
2670         g_return_if_fail (height >= 0);
2671
2672         if (view->document == NULL)
2673                 return;
2674
2675         if (view->presentation)
2676                 ev_view_zoom_for_size_presentation (view, width, height);
2677         else if (view->continuous && view->dual_page)
2678                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2679         else if (view->continuous)
2680                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2681         else if (view->dual_page)
2682                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2683         else
2684                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2685 }
2686
2687 /*** Status text messages ***/
2688
2689 const char *
2690 ev_view_get_status (EvView *view)
2691 {
2692         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2693
2694         return view->status;
2695 }
2696
2697 static void
2698 ev_view_set_status (EvView *view, const char *message)
2699 {
2700         g_return_if_fail (EV_IS_VIEW (view));
2701
2702         if (message != view->status) {
2703                 g_free (view->status);
2704                 view->status = g_strdup (message);
2705                 g_object_notify (G_OBJECT (view), "status");
2706         }
2707 }
2708
2709 static void
2710 update_find_status_message (EvView *view)
2711 {
2712         char *message;
2713
2714         if (view->current_page == view->find_page) {
2715                 int results;
2716
2717                 results = ev_document_find_get_n_results
2718                                 (EV_DOCUMENT_FIND (view->document),
2719                                  view->current_page);
2720                 /* TRANS: Sometimes this could be better translated as
2721                    "%d hit(s) on this page".  Therefore this string
2722                    contains plural cases. */
2723                 message = g_strdup_printf (ngettext ("%d found on this page",
2724                                                      "%d found on this page",
2725                                                      results),
2726                                            results);
2727         } else {
2728                 double percent;
2729
2730                 percent = ev_document_find_get_progress
2731                                 (EV_DOCUMENT_FIND (view->document));
2732                 if (percent >= (1.0 - 1e-10)) {
2733                         message = g_strdup (_("Not found"));
2734                 } else {
2735                         message = g_strdup_printf (_("%3d%% remaining to search"),
2736                                                    (int) ((1.0 - percent) * 100));
2737                 }
2738
2739         }
2740         ev_view_set_find_status (view, message);
2741         g_free (message);
2742 }
2743
2744 const char *
2745 ev_view_get_find_status (EvView *view)
2746 {
2747         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2748
2749         return view->find_status;
2750 }
2751
2752 static void
2753 ev_view_set_find_status (EvView *view, const char *message)
2754 {
2755         g_return_if_fail (EV_IS_VIEW (view));
2756
2757         g_free (view->find_status);
2758         view->find_status = g_strdup (message);
2759         g_object_notify (G_OBJECT (view), "find-status");
2760 }
2761
2762 /*** Find ***/
2763
2764 static void
2765 jump_to_find_result (EvView *view)
2766 {
2767         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2768         EvRectangle rect;
2769         GdkRectangle view_rect;
2770         int n_results;
2771         int page = view->find_page;
2772
2773         n_results = ev_document_find_get_n_results (find, page);
2774
2775         if (n_results > 0  && view->find_result < n_results) {
2776                 ev_document_find_get_result
2777                         (find, page, view->find_result, &rect);
2778
2779                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2780                 ensure_rectangle_is_visible (view, &view_rect);
2781         }
2782 }
2783
2784 static void
2785 jump_to_find_page (EvView *view, EvViewFindDirection direction)
2786 {
2787         int n_pages, i;
2788
2789         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2790
2791         for (i = 0; i < n_pages; i++) {
2792                 int has_results;
2793                 int page;
2794
2795                 if (direction == EV_VIEW_FIND_NEXT)
2796                         page = view->find_page + i;
2797                 else
2798                         page = view->find_page - i;
2799
2800
2801                 if (page >= n_pages) {
2802                         page = page - n_pages;
2803                 }
2804                 if (page < 0)
2805                         page = page + n_pages;
2806
2807                 has_results = ev_document_find_page_has_results
2808                                 (EV_DOCUMENT_FIND (view->document), page);
2809                 if (has_results == -1) {
2810                         view->find_page = page;
2811                         break;
2812                 } else if (has_results == 1) {
2813                         ev_page_cache_set_current_page (view->page_cache, page);
2814                         break;
2815                 }
2816         }
2817 }
2818
2819 gboolean
2820 ev_view_can_find_next (EvView *view)
2821 {
2822         int n_results = 0;
2823
2824         if (EV_IS_DOCUMENT_FIND (view->document)) {
2825                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2826
2827                 n_results = ev_document_find_get_n_results (find, view->current_page);
2828         }
2829
2830         return n_results > 0;
2831 }
2832
2833 void
2834 ev_view_find_next (EvView *view)
2835 {
2836         int n_results, n_pages;
2837         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2838
2839         n_results = ev_document_find_get_n_results (find, view->current_page);
2840
2841         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2842
2843         view->find_result++;
2844
2845         if (view->find_result >= n_results) {
2846
2847                 view->find_result = 0;
2848                 view->find_page++;
2849                 if (view->find_page >= n_pages) {
2850                         view->find_page = 0;
2851                 }
2852
2853                 jump_to_find_page (view, EV_VIEW_FIND_NEXT);
2854                 jump_to_find_result (view);
2855         } else {
2856                 jump_to_find_result (view);
2857                 gtk_widget_queue_draw (GTK_WIDGET (view));
2858         }
2859 }
2860
2861 void
2862 ev_view_find_previous (EvView *view)
2863 {
2864         int n_results, n_pages;
2865         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2866         EvPageCache *page_cache;
2867
2868         page_cache = ev_page_cache_get (view->document);
2869
2870         n_results = ev_document_find_get_n_results (find, view->current_page);
2871
2872         n_pages = ev_page_cache_get_n_pages (page_cache);
2873
2874         view->find_result--;
2875
2876         if (view->find_result < 0) {
2877
2878                 view->find_page--;
2879                 if (view->find_page < 0) {
2880                         view->find_page = n_pages - 1;
2881                 }
2882
2883                 jump_to_find_page (view, EV_VIEW_FIND_PREV);
2884                 view->find_result = ev_document_find_get_n_results (find, view->current_page) - 1;
2885                 jump_to_find_result (view);
2886         } else {
2887                 jump_to_find_result (view);
2888                 gtk_widget_queue_draw (GTK_WIDGET (view));
2889         }
2890 }
2891
2892 /*** Selections ***/
2893
2894 /* compute_new_selection_rect/text calculates the area currently selected by
2895  * view_rect.  each handles a different mode;
2896  */
2897 static GList *
2898 compute_new_selection_rect (EvView       *view,
2899                             GdkPoint     *start,
2900                             GdkPoint     *stop)
2901 {
2902         GdkRectangle view_rect;
2903         int n_pages, i;
2904         GList *list = NULL;
2905
2906         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
2907
2908         view_rect.x = MIN (start->x, stop->x);
2909         view_rect.y = MIN (start->y, stop->y);
2910         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
2911         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
2912
2913         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2914
2915         for (i = 0; i < n_pages; i++) {
2916                 GdkRectangle page_area;
2917                 GtkBorder border;
2918
2919                 if (get_page_extents (view, i, &page_area, &border)) {
2920                         GdkRectangle overlap;
2921
2922                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
2923                                 EvViewSelection *selection;
2924
2925                                 selection = g_new0 (EvViewSelection, 1);
2926                                 selection->page = i;
2927                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2928                                                        &(selection->rect));
2929
2930                                 list = g_list_append (list, selection);
2931                         }
2932                 }
2933         }
2934
2935         return list;
2936 }
2937
2938 static gboolean
2939 gdk_rectangle_point_in (GdkRectangle *rectangle,
2940                         GdkPoint     *point)
2941 {
2942         return rectangle->x <= point->x &&
2943                 rectangle->y <= point->y &&
2944                 point->x < rectangle->x + rectangle->width &&
2945                 point->y < rectangle->y + rectangle->height;
2946 }
2947
2948 static GList *
2949 compute_new_selection_text (EvView   *view,
2950                             GdkPoint *start,
2951                             GdkPoint *stop)
2952 {
2953         int n_pages, i, first, last;
2954         GList *list = NULL;
2955         EvViewSelection *selection;
2956         gint width, height;
2957
2958         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
2959
2960         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2961
2962         /* First figure out the range of pages the selection
2963          * affects. */
2964         first = n_pages;
2965         last = 0;
2966         for (i = 0; i < n_pages; i++) {
2967                 GdkRectangle page_area;
2968                 GtkBorder border;
2969
2970                 get_page_extents (view, i, &page_area, &border);
2971                 if (gdk_rectangle_point_in (&page_area, start) ||
2972                     gdk_rectangle_point_in (&page_area, stop)) {
2973                         if (first == n_pages)
2974                                 first = i;
2975                         last = i;
2976                 }
2977
2978         }
2979
2980
2981
2982         /* Now create a list of EvViewSelection's for the affected
2983          * pages.  This could be an empty list, a list of just one
2984          * page or a number of pages.*/
2985         for (i = first; i < last + 1; i++) {
2986                 GdkRectangle page_area;
2987                 GtkBorder border;
2988                 GdkPoint *point;
2989
2990                 ev_page_cache_get_size (view->page_cache, i,
2991                                         view->rotation,
2992                                         1.0, &width, &height);
2993
2994                 selection = g_new0 (EvViewSelection, 1);
2995                 selection->page = i;
2996                 selection->rect.x1 = selection->rect.y1 = 0;
2997                 selection->rect.x2 = width;
2998                 selection->rect.y2 = height;
2999
3000                 get_page_extents (view, i, &page_area, &border);
3001
3002                 if (gdk_rectangle_point_in (&page_area, start))
3003                         point = start;
3004                 else
3005                         point = stop;
3006
3007                 if (i == first)
3008                         view_point_to_doc_point (view, point, &page_area,
3009                                                  &selection->rect.x1,
3010                                                  &selection->rect.y1);
3011
3012                 /* If the selection is contained within just one page,
3013                  * make sure we don't write 'start' into both points
3014                  * in selection->rect. */
3015                 if (first == last)
3016                         point = stop;
3017
3018                 if (i == last)
3019                         view_point_to_doc_point (view, point, &page_area,
3020                                                  &selection->rect.x2,
3021                                                  &selection->rect.y2);
3022
3023                 list = g_list_append (list, selection);
3024         }
3025
3026         return list;
3027 }
3028
3029 /* This function takes the newly calculated list, and figures out which regions
3030  * have changed.  It then queues a redraw approporiately.
3031  */
3032 static void
3033 merge_selection_region (EvView *view,
3034                         GList  *new_list)
3035 {
3036         GList *old_list;
3037         GList *new_list_ptr, *old_list_ptr;
3038
3039         /* Update the selection */
3040         old_list = ev_pixbuf_cache_get_selection_list (view->pixbuf_cache);
3041         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3042         view->selection_info.selections = new_list;
3043         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, new_list);
3044
3045         new_list_ptr = new_list;
3046         old_list_ptr = old_list;
3047
3048         while (new_list_ptr || old_list_ptr) {
3049                 EvViewSelection *old_sel, *new_sel;
3050                 int cur_page;
3051                 GdkRegion *region = NULL;
3052
3053                 new_sel = (new_list_ptr) ? (new_list_ptr->data) : NULL;
3054                 old_sel = (old_list_ptr) ? (old_list_ptr->data) : NULL;
3055
3056                 /* Assume that the lists are in order, and we run through them
3057                  * comparing them, one page at a time.  We come out with the
3058                  * first page we see. */
3059                 if (new_sel && old_sel) {
3060                         if (new_sel->page < old_sel->page) {
3061                                 new_list_ptr = new_list_ptr->next;
3062                                 old_sel = NULL;
3063                         } else if (new_sel->page > old_sel->page) {
3064                                 old_list_ptr = old_list_ptr->next;
3065                                 new_sel = NULL;
3066                         } else {
3067                                 new_list_ptr = new_list_ptr->next;
3068                                 old_list_ptr = old_list_ptr->next;
3069                         }
3070                 } else if (new_sel) {
3071                         new_list_ptr = new_list_ptr->next;
3072                 } else if (old_sel) {
3073                         old_list_ptr = old_list_ptr->next;
3074                 }
3075
3076                 g_assert (new_sel || old_sel);
3077
3078                 /* is the page we're looking at on the screen?*/
3079                 cur_page = new_sel ? new_sel->page : old_sel->page;
3080                 if (cur_page < view->start_page || cur_page > view->end_page)
3081                         continue;
3082
3083                 /* seed the cache with a new page.  We are going to need the new
3084                  * region too. */
3085                 if (new_sel) {
3086                         GdkRegion *tmp_region = NULL;
3087                         ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
3088                                                               cur_page,
3089                                                               view->scale,
3090                                                               &tmp_region);
3091                         if (tmp_region) {
3092                                 new_sel->covered_region = gdk_region_copy (tmp_region);
3093                         }
3094                 }
3095
3096                 /* Now we figure out what needs redrawing */
3097                 if (old_sel && new_sel) {
3098                         if (old_sel->covered_region &&
3099                             new_sel->covered_region) {
3100                                 /* We only want to redraw the areas that have
3101                                  * changed, so we xor the old and new regions
3102                                  * and redraw if it's different */
3103                                 region = gdk_region_copy (old_sel->covered_region);
3104                                 gdk_region_xor (region, new_sel->covered_region);
3105                                 if (gdk_region_empty (region)) {
3106                                         gdk_region_destroy (region);
3107                                         region = NULL;
3108                                 }
3109                         } else if (old_sel->covered_region) {
3110                                 region = gdk_region_copy (old_sel->covered_region);
3111                         } else if (new_sel->covered_region) {
3112                                 region = gdk_region_copy (new_sel->covered_region);
3113                         }
3114                 } else if (old_sel && !new_sel) {
3115                         if (old_sel->covered_region && !gdk_region_empty (old_sel->covered_region)) {
3116                                 region = gdk_region_copy (old_sel->covered_region);
3117                         }
3118                 } else if (!old_sel && new_sel) {
3119                         if (new_sel->covered_region && !gdk_region_empty (new_sel->covered_region)) {
3120                                 region = gdk_region_copy (new_sel->covered_region);
3121                         }
3122                 } else {
3123                         g_assert_not_reached ();
3124                 }
3125
3126                 /* Redraw the damaged region! */
3127                 if (region) {
3128                         GdkRectangle page_area;
3129                         GtkBorder border;
3130
3131                         get_page_extents (view, cur_page, &page_area, &border);
3132                         gdk_region_offset (region,
3133                                            page_area.x + border.left - view->scroll_x,
3134                                            page_area.y + border.top - view->scroll_y);
3135                         gdk_window_invalidate_region (GTK_WIDGET (view)->window, region, TRUE);
3136                         gdk_region_destroy (region);
3137                 }
3138         }
3139
3140         /* Free the old list, now that we're done with it. */
3141         g_list_foreach (old_list, (GFunc) selection_free, NULL);
3142 }
3143
3144 static void
3145 compute_selections (EvView   *view,
3146                     GdkPoint *start,
3147                     GdkPoint *stop)
3148 {
3149         GList *list;
3150
3151         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
3152                 list = compute_new_selection_rect (view, start, stop);
3153         else
3154                 list = compute_new_selection_text (view, start, stop);
3155         merge_selection_region (view, list);
3156 }
3157
3158 /* Free's the selection.  It's up to the caller to queue redraws if needed.
3159  */
3160 static void
3161 selection_free (EvViewSelection *selection)
3162 {
3163         if (selection->covered_region)
3164                 gdk_region_destroy (selection->covered_region);
3165         g_free (selection);
3166 }
3167
3168 static void
3169 clear_selection (EvView *view)
3170 {
3171         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
3172         view->selection_info.selections = NULL;
3173         view->selection_info.in_selection = FALSE;
3174 }
3175
3176
3177 void
3178 ev_view_select_all (EvView *view)
3179 {
3180         int n_pages, i;
3181
3182         clear_selection (view);
3183
3184         n_pages = ev_page_cache_get_n_pages (view->page_cache);
3185         for (i = 0; i < n_pages; i++) {
3186                 int width, height;
3187                 EvViewSelection *selection;
3188
3189                 ev_page_cache_get_size (view->page_cache,
3190                                         i,
3191                                         view->rotation,
3192                                         1.0, &width, &height);
3193
3194                 selection = g_new0 (EvViewSelection, 1);
3195                 selection->page = i;
3196                 selection->rect.x1 = selection->rect.y1 = 0;
3197                 selection->rect.x2 = width;
3198                 selection->rect.y2 = height;
3199
3200                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
3201         }
3202
3203         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
3204         gtk_widget_queue_draw (GTK_WIDGET (view));
3205 }
3206
3207 static char *
3208 get_selected_text (EvView *ev_view)
3209 {
3210         GString *text;
3211         GList *l;
3212
3213         text = g_string_new (NULL);
3214
3215         ev_document_doc_mutex_lock ();
3216
3217         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3218                 EvViewSelection *selection = (EvViewSelection *)l->data;
3219                 char *tmp;
3220
3221                 tmp = ev_document_get_text (ev_view->document,
3222                                             selection->page,
3223                                             &selection->rect);
3224                 g_string_append (text, tmp);
3225                 g_free (tmp);
3226         }
3227
3228         ev_document_doc_mutex_unlock ();
3229
3230         return g_string_free (text, FALSE);
3231 }
3232
3233 void
3234 ev_view_copy (EvView *ev_view)
3235 {
3236         GtkClipboard *clipboard;
3237         char *text;
3238
3239         if (!ev_document_can_get_text (ev_view->document)) {
3240                 return;
3241         }
3242
3243         text = get_selected_text (ev_view);
3244         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3245                                               GDK_SELECTION_CLIPBOARD);
3246         gtk_clipboard_set_text (clipboard, text, -1);
3247         g_free (text);
3248 }
3249
3250 static void
3251 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3252                         GtkSelectionData *selection_data,
3253                         guint             info,
3254                         gpointer          data)
3255 {
3256         EvView *ev_view = EV_VIEW (data);
3257         char *text;
3258
3259         if (!ev_document_can_get_text (ev_view->document)) {
3260                 return;
3261         }
3262
3263         text = get_selected_text (ev_view);
3264         gtk_selection_data_set_text (selection_data, text, -1);
3265         g_free (text);
3266 }
3267
3268 static void
3269 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3270                           gpointer      data)
3271 {
3272         EvView *view = EV_VIEW (data);
3273
3274         clear_selection (view);
3275 }
3276
3277 static void
3278 ev_view_update_primary_selection (EvView *ev_view)
3279 {
3280         GtkClipboard *clipboard;
3281
3282         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3283                                               GDK_SELECTION_PRIMARY);
3284
3285         if (ev_view->selection_info.selections) {
3286                 if (!gtk_clipboard_set_with_owner (clipboard,
3287                                                    targets,
3288                                                    G_N_ELEMENTS (targets),
3289                                                    ev_view_primary_get_cb,
3290                                                    ev_view_primary_clear_cb,
3291                                                    G_OBJECT (ev_view)))
3292                         ev_view_primary_clear_cb (clipboard, ev_view);
3293         } else {
3294                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3295                         gtk_clipboard_clear (clipboard);
3296         }
3297 }
3298
3299 /*** Cursor operations ***/
3300
3301 static GdkCursor *
3302 ev_view_create_invisible_cursor(void)
3303 {
3304        GdkBitmap *empty;
3305        GdkColor black = { 0, 0, 0, 0 };
3306        static char bits[] = { 0x00 };
3307
3308        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3309
3310        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3311 }
3312
3313 static void
3314 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3315 {
3316         GdkCursor *cursor = NULL;
3317         GdkDisplay *display;
3318         GtkWidget *widget;
3319
3320         if (view->cursor == new_cursor) {
3321                 return;
3322         }
3323
3324         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3325         display = gtk_widget_get_display (widget);
3326         view->cursor = new_cursor;
3327
3328         switch (new_cursor) {
3329                 case EV_VIEW_CURSOR_NORMAL:
3330                         gdk_window_set_cursor (widget->window, NULL);
3331                         break;
3332                 case EV_VIEW_CURSOR_IBEAM:
3333                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3334                         break;
3335                 case EV_VIEW_CURSOR_LINK:
3336                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3337                         break;
3338                 case EV_VIEW_CURSOR_WAIT:
3339                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3340                         break;
3341                 case EV_VIEW_CURSOR_HIDDEN:
3342                         cursor = ev_view_create_invisible_cursor ();
3343                         break;
3344                 case EV_VIEW_CURSOR_DRAG:
3345                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3346                         break;
3347         }
3348
3349         if (cursor) {
3350                 gdk_window_set_cursor (widget->window, cursor);
3351                 gdk_cursor_unref (cursor);
3352                 gdk_flush();
3353         }
3354 }
3355
3356 void
3357 ev_view_hide_cursor (EvView *view)
3358 {
3359        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3360 }
3361
3362 void
3363 ev_view_show_cursor (EvView *view)
3364 {
3365        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3366 }
3367
3368 /*** Enum description for usage in signal ***/
3369
3370 GType
3371 ev_sizing_mode_get_type (void)
3372 {
3373   static GType etype = 0;
3374   if (etype == 0) {
3375     static const GEnumValue values[] = {
3376       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3377       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3378       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3379       { 0, NULL, NULL }
3380     };
3381     etype = g_enum_register_static ("EvSizingMode", values);
3382   }
3383   return etype;
3384 }
3385