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