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