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
 753 get_page_y_offset (EvView *view, int page, double zoom, int *y_offset)
 754 {
 755         int max_width, offset;
 756         GtkBorder border;
 757
 758         g_return_if_fail (y_offset != NULL);
 759
 760         ev_page_cache_get_max_width (view->page_cache, view->orientation, zoom, &max_width);
 761
 762         compute_border (view, max_width, max_width, &border);
 763
 764         if (view->dual_page) {
 765                 ev_page_cache_get_height_to_page (view->page_cache, page,
 766                                                   view->orientation, zoom, NULL, &offset);
 767                 offset += (page / 2 + 1) * view->spacing + (page / 2) * (border.top + border.bottom);
 768         } else {
 769                 ev_page_cache_get_height_to_page (view->page_cache, page,
 770                                                   view->orientation, 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,
 806                                              view->orientation, &max_width);
 807                 max_width = max_width + border->left + border->right;
 808                 /* Get the location of the bounding box */
 809                 if (view->dual_page) {
 810                         x = view->spacing + (page % 2) * (max_width + view->spacing);
 811                         x = x + MAX (0, widget->allocation.width - (max_width * 2 + view->spacing * 3)) / 2;
 812                         if (page % 2 == 0)
 813                                 x = x + (max_width - width - border->left - border->right);
 814                 } else {
 815                         x = view->spacing;
 816                         x = x + MAX (0, widget->allocation.width - (width + view->spacing * 2)) / 2;
 817                 }
 818
 819                 get_page_y_offset (view, page, view->scale, &y);
 820
 821                 page_area->x = x;
 822                 page_area->y = y;
 823         } else {
 824                 gint x, y;
 825                 if (view->dual_page) {
 826                         gint width_2, height_2;
 827                         gint max_width = width;
 828                         gint max_height = height;
 829                         GtkBorder overall_border;
 830                         gint other_page;
 831
 832                         other_page = page ^ 1;
 833
 834                         /* First, we get the bounding box of the two pages */
 835                         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
 836                                 ev_page_cache_get_size (view->page_cache,
 837                                                         other_page,
 838                                                         view->orientation,
 839                                                         view->scale,
 840                                                         &width_2, &height_2);
 841                                 if (width_2 > width)
 842                                         max_width = width_2;
 843                                 if (height_2 > height)
 844                                         max_height = height_2;
 845                         }
 846                         compute_border (view, max_width, max_height, &overall_border);
 847
 848                         /* Find the offsets */
 849                         x = view->spacing;
 850                         y = view->spacing;
 851
 852                         /* Adjust for being the left or right page */
 853                         if (page % 2 == 0)
 854                                 x = x + max_width - width;
 855                         else
 856                                 x = x + (max_width + overall_border.left + overall_border.right) + view->spacing;
 857
 858                         y = y + (max_height - height)/2;
 859
 860                         /* Adjust for extra allocation */
 861                         x = x + MAX (0, widget->allocation.width -
 862                                      ((max_width + overall_border.left + overall_border.right) * 2 + view->spacing * 3))/2;
 863                         y = y + MAX (0, widget->allocation.height - (height + view->spacing * 2))/2;
 864                 } else {
 865                         x = view->spacing;
 866                         y = view->spacing;
 867
 868                         /* Adjust for extra allocation */
 869                         x = x + MAX (0, widget->allocation.width - (width + border->left + border->right + view->spacing * 2))/2;
 870                         y = y + MAX (0, widget->allocation.height - (height + border->top + border->bottom +  view->spacing * 2))/2;
 871                 }
 872
 873                 page_area->x = x;
 874                 page_area->y = y;
 875         }
 876
 877         return TRUE;
 878 }
 879
 880 static void
 881 view_point_to_doc_point (EvView *view,
 882                          GdkPoint *view_point,
 883                          GdkRectangle *page_area,
 884                          double  *doc_point_x,
 885                          double  *doc_point_y)
 886 {
 887         *doc_point_x = (double) (view_point->x - page_area->x) / view->scale;
 888         *doc_point_y = (double) (view_point->y - page_area->y) / view->scale;
 889 }
 890
 891 static void
 892 view_rect_to_doc_rect (EvView *view,
 893                        GdkRectangle *view_rect,
 894                        GdkRectangle *page_area,
 895                        EvRectangle  *doc_rect)
 896 {
 897         doc_rect->x1 = (double) (view_rect->x - page_area->x) / view->scale;
 898         doc_rect->y1 = (double) (view_rect->y - page_area->y) / view->scale;
 899         doc_rect->x2 = doc_rect->x1 + (double) view_rect->width / view->scale;
 900         doc_rect->y2 = doc_rect->y1 + (double) view_rect->height / view->scale;
 901 }
 902
 903 static void
 904 doc_rect_to_view_rect (EvView       *view,
 905                        int           page,
 906                        EvRectangle  *doc_rect,
 907                        GdkRectangle *view_rect)
 908 {
 909         GdkRectangle page_area;
 910         GtkBorder border;
 911         int width, height;
 912
 913         get_page_extents (view, page, &page_area, &border);
 914
 915         width = doc_rect->x2 - doc_rect->x1;
 916         height = doc_rect->y2 - doc_rect->y1;
 917         view_rect->x = floor (doc_rect->x1 * view->scale) + page_area.x;
 918         view_rect->y = floor (doc_rect->y1 * view->scale) + page_area.y;
 919         view_rect->width = ceil (width * view->scale);
 920         view_rect->height = ceil (height * view->scale);
 921 }
 922
 923 static void
 924 find_page_at_location (EvView  *view,
 925                        gdouble  x,
 926                        gdouble  y,
 927                        gint    *page,
 928                        gint    *x_offset,
 929                        gint    *y_offset)
 930 {
 931         int i;
 932
 933         if (view->document == NULL)
 934                 return;
 935
 936         g_assert (page);
 937         g_assert (x_offset);
 938         g_assert (y_offset);
 939
 940         for (i = view->start_page; i <= view->end_page; i++) {
 941                 GdkRectangle page_area;
 942                 GtkBorder border;
 943
 944                 if (! get_page_extents (view, i, &page_area, &border))
 945                         continue;
 946
 947                 if ((x >= page_area.x + border.left) &&
 948                     (x < page_area.x + page_area.width - border.right) &&
 949                     (y >= page_area.y + border.top) &&
 950                     (y < page_area.y + page_area.height - border.bottom)) {
 951                         *page = i;
 952                         *x_offset = x - (page_area.x + border.left);
 953                         *y_offset = y - (page_area.y + border.top);
 954                         return;
 955                 }
 956         }
 957
 958         *page = -1;
 959 }
 960
 961 static gboolean
 962 location_in_text (EvView  *view,
 963                   gdouble  x,
 964                   gdouble  y)
 965 {
 966         GdkRegion *region;
 967         gint page = -1;
 968         gint x_offset = 0, y_offset = 0;
 969
 970         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 971
 972         if (page == -1)
 973                 return FALSE;
 974
 975         region = ev_pixbuf_cache_get_text_mapping (view->pixbuf_cache, page);
 976
 977         if (region)
 978                 return gdk_region_point_in (region, x_offset / view->scale, y_offset / view->scale);
 979         else
 980                 return FALSE;
 981 }
 982
 983 /*** Hyperref ***/
 984 static EvLink *
 985 get_link_at_location (EvView  *view,
 986                       gdouble  x,
 987                       gdouble  y)
 988 {
 989         gint page = -1;
 990         gint x_offset = 0, y_offset = 0;
 991         GList *link_mapping;
 992
 993         find_page_at_location (view, x, y, &page, &x_offset, &y_offset);
 994
 995         if (page == -1)
 996                 return NULL;
 997
 998         link_mapping = ev_pixbuf_cache_get_link_mapping (view->pixbuf_cache, page);
 999
1000         if (link_mapping)
1001                 return ev_link_mapping_find (link_mapping, x_offset / view->scale, y_offset / view->scale);
1002         else
1003                 return NULL;
1004 }
1005
1006 /* FIXME: standardize this sometime */
1007 static void
1008 go_to_link (EvView *view, EvLink *link)
1009 {
1010         EvLinkType type;
1011         const char *uri;
1012         int page;
1013
1014         type = ev_link_get_link_type (link);
1015
1016         switch (type) {
1017                 case EV_LINK_TYPE_TITLE:
1018                         break;
1019                 case EV_LINK_TYPE_PAGE:
1020                         page = ev_link_get_page (link);
1021                         ev_page_cache_set_current_page (view->page_cache, page);
1022                         break;
1023                 case EV_LINK_TYPE_EXTERNAL_URI:
1024                         uri = ev_link_get_uri (link);
1025                         gnome_vfs_url_show (uri);
1026                         break;
1027         }
1028 }
1029
1030 static char *
1031 status_message_from_link (EvView *view, EvLink *link)
1032 {
1033         EvLinkType type;
1034         char *msg = NULL;
1035         char *page_label;
1036
1037         type = ev_link_get_link_type (link);
1038
1039         switch (type) {
1040                 case EV_LINK_TYPE_TITLE:
1041                         if (ev_link_get_title (link))
1042                                 msg = g_strdup (ev_link_get_title (link));
1043                         break;
1044                 case EV_LINK_TYPE_PAGE:
1045                         page_label = ev_page_cache_get_page_label (view->page_cache, ev_link_get_page (link));
1046                         msg = g_strdup_printf (_("Go to page %s"), page_label);
1047                         g_free (page_label);
1048                         break;
1049                 case EV_LINK_TYPE_EXTERNAL_URI:
1050                         msg = g_strdup (ev_link_get_uri (link));
1051                         break;
1052                 default:
1053                         break;
1054         }
1055
1056         return msg;
1057 }
1058
1059
1060 /*** GtkWidget implementation ***/
1061
1062 static void
1063 ev_view_size_request_continuous_dual_page (EvView         *view,
1064                                            GtkRequisition *requisition)
1065 {
1066         int max_width;
1067         gint n_pages;
1068         GtkBorder border;
1069
1070         ev_page_cache_get_max_width (view->page_cache, view->orientation,
1071                                      view->scale, &max_width);
1072         compute_border (view, max_width, max_width, &border);
1073
1074         n_pages = ev_page_cache_get_n_pages (view->page_cache) + 1;
1075
1076         requisition->width = (max_width + border.left + border.right) * 2 + (view->spacing * 3);
1077         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1078
1079         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1080                 requisition->width = 1;
1081         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1082                 requisition->width = 1;
1083                 /* FIXME: This could actually be set on one page docs or docs
1084                  * with a strange aspect ratio. */
1085                 /* requisition->height = 1;*/
1086         }
1087 }
1088
1089 static void
1090 ev_view_size_request_continuous (EvView         *view,
1091                                  GtkRequisition *requisition)
1092 {
1093         int max_width;
1094         int n_pages;
1095         GtkBorder border;
1096
1097
1098         ev_page_cache_get_max_width (view->page_cache, view->orientation,
1099                                      view->scale, &max_width);
1100         n_pages = ev_page_cache_get_n_pages (view->page_cache);
1101         compute_border (view, max_width, max_width, &border);
1102
1103         requisition->width = max_width + (view->spacing * 2) + border.left + border.right;
1104         get_page_y_offset (view, n_pages, view->scale, &requisition->height);
1105
1106         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1107                 requisition->width = 1;
1108         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1109                 requisition->width = 1;
1110                 /* FIXME: This could actually be set on one page docs or docs
1111                  * with a strange aspect ratio. */
1112                 /* requisition->height = 1;*/
1113         }
1114 }
1115
1116 static void
1117 ev_view_size_request_dual_page (EvView         *view,
1118                                 GtkRequisition *requisition)
1119 {
1120         GtkBorder border;
1121         gint width, height;
1122
1123         /* Find the largest of the two. */
1124         ev_page_cache_get_size (view->page_cache,
1125                                 view->current_page,
1126                                 view->orientation,
1127                                 view->scale,
1128                                 &width, &height);
1129         if (view->current_page + 1 < ev_page_cache_get_n_pages (view->page_cache)) {
1130                 gint width_2, height_2;
1131                 ev_page_cache_get_size (view->page_cache,
1132                                         view->current_page + 1,
1133                                         view->orientation,
1134                                         view->scale,
1135                                         &width_2, &height_2);
1136                 if (width_2 > width) {
1137                         width = width_2;
1138                         height = height_2;
1139                 }
1140         }
1141         compute_border (view, width, height, &border);
1142
1143         requisition->width = ((width + border.left + border.right) * 2) +
1144                 (view->spacing * 3);
1145         requisition->height = (height + border.top + border.bottom) +
1146                 (view->spacing * 2);
1147
1148         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1149                 requisition->width = 1;
1150         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1151                 requisition->width = 1;
1152                 requisition->height = 1;
1153         }
1154 }
1155
1156 static void
1157 ev_view_size_request_single_page (EvView         *view,
1158                                   GtkRequisition *requisition)
1159 {
1160         GtkBorder border;
1161         gint width, height;
1162
1163         ev_page_cache_get_size (view->page_cache,
1164                                 view->current_page,
1165                                 view->orientation,
1166                                 view->scale,
1167                                 &width, &height);
1168         compute_border (view, width, height, &border);
1169
1170         requisition->width = width + border.left + border.right + (2 * view->spacing);
1171         requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1172
1173         if (view->sizing_mode == EV_SIZING_FIT_WIDTH) {
1174                 requisition->width = 1;
1175                 requisition->height = height + border.top + border.bottom + (2 * view->spacing);
1176         } else if (view->sizing_mode == EV_SIZING_BEST_FIT) {
1177                 requisition->width = 1;
1178                 requisition->height = 1;
1179         }
1180 }
1181
1182 static void
1183 ev_view_size_request (GtkWidget      *widget,
1184                       GtkRequisition *requisition)
1185 {
1186         EvView *view = EV_VIEW (widget);
1187
1188         if (view->document == NULL) {
1189                 requisition->width = 1;
1190                 requisition->height = 1;
1191                 return;
1192         }
1193
1194         if (view->presentation) {
1195                 requisition->width = 1;
1196                 requisition->height = 1;
1197                 return;
1198         }
1199
1200         if (view->continuous && view->dual_page)
1201                 ev_view_size_request_continuous_dual_page (view, requisition);
1202         else if (view->continuous)
1203                 ev_view_size_request_continuous (view, requisition);
1204         else if (view->dual_page)
1205                 ev_view_size_request_dual_page (view, requisition);
1206         else
1207                 ev_view_size_request_single_page (view, requisition);
1208 }
1209
1210 static void
1211 ev_view_size_allocate (GtkWidget      *widget,
1212                        GtkAllocation  *allocation)
1213 {
1214         EvView *view = EV_VIEW (widget);
1215
1216         if (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
1217                   view->sizing_mode == EV_SIZING_BEST_FIT) {
1218
1219                 g_signal_emit (view, signals[SIGNAL_ZOOM_INVALID], 0);
1220
1221                 ev_view_size_request (widget, &widget->requisition);
1222         }
1223
1224         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
1225         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
1226
1227         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1228         view->pending_resize = FALSE;
1229
1230         if (view->document)
1231                 view_update_range_and_current_page (view);
1232
1233         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
1234 }
1235
1236 static void
1237 ev_view_realize (GtkWidget *widget)
1238 {
1239         EvView *view = EV_VIEW (widget);
1240         GdkWindowAttr attributes;
1241
1242         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
1243
1244
1245         attributes.window_type = GDK_WINDOW_CHILD;
1246         attributes.wclass = GDK_INPUT_OUTPUT;
1247         attributes.visual = gtk_widget_get_visual (widget);
1248         attributes.colormap = gtk_widget_get_colormap (widget);
1249
1250         attributes.x = widget->allocation.x;
1251         attributes.y = widget->allocation.y;
1252         attributes.width = widget->allocation.width;
1253         attributes.height = widget->allocation.height;
1254         attributes.event_mask = GDK_EXPOSURE_MASK |
1255                                 GDK_BUTTON_PRESS_MASK |
1256                                 GDK_BUTTON_RELEASE_MASK |
1257                                 GDK_SCROLL_MASK |
1258                                 GDK_KEY_PRESS_MASK |
1259                                 GDK_POINTER_MOTION_MASK |
1260                                 GDK_LEAVE_NOTIFY_MASK;
1261
1262         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
1263                                          &attributes,
1264                                          GDK_WA_X | GDK_WA_Y |
1265                                          GDK_WA_COLORMAP |
1266                                          GDK_WA_VISUAL);
1267         gdk_window_set_user_data (widget->window, widget);
1268         widget->style = gtk_style_attach (widget->style, widget->window);
1269
1270         if (view->presentation)
1271                 gdk_window_set_background (widget->window, &widget->style->black);
1272         else
1273                 gdk_window_set_background (widget->window, &widget->style->mid [GTK_STATE_NORMAL]);
1274 }
1275
1276 static void
1277 ev_view_unrealize (GtkWidget *widget)
1278 {
1279         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
1280 }
1281
1282 static gboolean
1283 ev_view_scroll_event (GtkWidget *widget, GdkEventScroll *event)
1284 {
1285         EvView *view = EV_VIEW (widget);
1286
1287         if ((event->state & GDK_CONTROL_MASK) != 0) {
1288
1289                  ev_view_set_sizing_mode (view, EV_SIZING_FREE);
1290
1291                  if (event->direction == GDK_SCROLL_UP ||
1292                         event->direction == GDK_SCROLL_LEFT) {
1293                             if (ev_view_can_zoom_in (view)) {
1294                                     ev_view_zoom_in (view);
1295                             }
1296                  } else {
1297                             if (ev_view_can_zoom_out (view)) {
1298                                     ev_view_zoom_out (view);
1299                             }
1300                  }
1301                  return TRUE;
1302         }
1303
1304         if ((event->state & GDK_SHIFT_MASK) != 0) {
1305                 if (event->direction == GDK_SCROLL_UP)
1306                         event->direction = GDK_SCROLL_LEFT;
1307                 if (event->direction == GDK_SCROLL_DOWN)
1308                         event->direction = GDK_SCROLL_RIGHT;
1309         }
1310
1311         return FALSE;
1312 }
1313
1314 static EvViewSelection *
1315 find_selection_for_page (EvView *view,
1316                          gint    page)
1317 {
1318         GList *list;
1319
1320         for (list = view->selection_info.selections; list != NULL; list = list->next) {
1321                 EvViewSelection *selection;
1322
1323                 selection = (EvViewSelection *) list->data;
1324
1325                 if (selection->page == page)
1326                         return selection;
1327         }
1328
1329         return NULL;
1330 }
1331
1332 static gboolean
1333 ev_view_expose_event (GtkWidget      *widget,
1334                       GdkEventExpose *event)
1335 {
1336         EvView *view = EV_VIEW (widget);
1337         int i;
1338
1339         if (view->document == NULL)
1340                 return FALSE;
1341
1342         for (i = view->start_page; i <= view->end_page; i++) {
1343                 GdkRectangle page_area;
1344                 GtkBorder border;
1345
1346                 if (!get_page_extents (view, i, &page_area, &border))
1347                         continue;
1348
1349                 page_area.x -= view->scroll_x;
1350                 page_area.y -= view->scroll_y;
1351
1352                 draw_one_page (view, i, &page_area, &border, &(event->area));
1353
1354                 if (EV_IS_DOCUMENT_FIND (view->document))
1355                         highlight_find_results (view, i);
1356         }
1357
1358         return FALSE;
1359 }
1360
1361 static gboolean
1362 ev_view_button_press_event (GtkWidget      *widget,
1363                             GdkEventButton *event)
1364 {
1365         EvView *view = EV_VIEW (widget);
1366
1367         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
1368                 gtk_widget_grab_focus (widget);
1369         }
1370
1371         view->pressed_button = event->button;
1372
1373         switch (event->button) {
1374                 case 1:
1375                         if (view->selection_info.selections) {
1376                                 clear_selection (view);
1377                                 gtk_widget_queue_draw (widget);
1378                         }
1379
1380                         view->selection_info.start.x = event->x + view->scroll_x;
1381                         view->selection_info.start.y = event->y + view->scroll_y;
1382                         return TRUE;
1383                 case 2:
1384                         /* use root coordinates as reference point because
1385                          * scrolling changes window relative coordinates */
1386                         view->drag_info.start.x = event->x_root;
1387                         view->drag_info.start.y = event->y_root;
1388                         view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment);
1389                         view->drag_info.vadj = gtk_adjustment_get_value (view->vadjustment);
1390
1391                         ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG);
1392
1393                         return TRUE;
1394         }
1395
1396         return FALSE;
1397 }
1398
1399 static gboolean
1400 ev_view_motion_notify_event (GtkWidget      *widget,
1401                              GdkEventMotion *event)
1402 {
1403         EvView *view = EV_VIEW (widget);
1404
1405         if (!view->document)
1406                 return FALSE;
1407
1408         if (view->pressed_button == 1) {
1409                 GdkPoint point;
1410
1411                 view->selection_info.in_selection = TRUE;
1412                 point.x = event->x + view->scroll_x;
1413                 point.y = event->y + view->scroll_y;
1414                 compute_selections (view, &view->selection_info.start, &point);
1415
1416                 return TRUE;
1417         } else if (view->pressed_button == 2) {
1418                 if (!view->drag_info.in_drag) {
1419                         gboolean start;
1420
1421                         start = gtk_drag_check_threshold (widget,
1422                                                           view->drag_info.start.x,
1423                                                           view->drag_info.start.y,
1424                                                           event->x_root,
1425                                                           event->y_root);
1426                         view->drag_info.in_drag = start;
1427                 }
1428
1429                 if (view->drag_info.in_drag) {
1430                         int dx, dy;
1431                         gdouble dhadj_value, dvadj_value;
1432
1433                         dx = event->x_root - view->drag_info.start.x;
1434                         dy = event->y_root - view->drag_info.start.y;
1435
1436                         dhadj_value = view->hadjustment->page_size *
1437                                       (gdouble)dx / widget->allocation.width;
1438                         dvadj_value = view->vadjustment->page_size *
1439                                       (gdouble)dy / widget->allocation.height;
1440
1441                         /* clamp scrolling to visible area */
1442                         gtk_adjustment_set_value (view->hadjustment,
1443                                                   MIN(view->drag_info.hadj - dhadj_value,
1444                                                       view->hadjustment->upper -
1445                                                       view->hadjustment->page_size));
1446                         gtk_adjustment_set_value (view->vadjustment,
1447                                                   MIN(view->drag_info.vadj - dvadj_value,
1448                                                       view->vadjustment->upper -
1449                                                       view->vadjustment->page_size));
1450
1451                         return TRUE;
1452                 }
1453         } else if (view->pressed_button <= 0) {
1454                 EvLink *link;
1455
1456                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1457                 if (link) {
1458                         char *msg;
1459
1460                         msg = status_message_from_link (view, link);
1461                         ev_view_set_status (view, msg);
1462                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
1463                         g_free (msg);
1464                 } else if (location_in_text (view, event->x + view->scroll_x, event->y + view->scroll_y)) {
1465                         ev_view_set_cursor (view, EV_VIEW_CURSOR_IBEAM);
1466                 } else {
1467                         ev_view_set_status (view, NULL);
1468                         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1469                             view->cursor == EV_VIEW_CURSOR_IBEAM)
1470                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1471                 }
1472                 return TRUE;
1473         }
1474
1475         return FALSE;
1476 }
1477
1478 static gboolean
1479 ev_view_button_release_event (GtkWidget      *widget,
1480                               GdkEventButton *event)
1481 {
1482         EvView *view = EV_VIEW (widget);
1483
1484         if (view->pressed_button == 2) {
1485                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1486         }
1487
1488         view->pressed_button = -1;
1489         view->drag_info.in_drag = FALSE;
1490
1491         if (view->selection_info.selections) {
1492                 ev_view_update_primary_selection (view);
1493         } else if (view->document) {
1494                 EvLink *link;
1495
1496                 link = get_link_at_location (view, event->x + view->scroll_x, event->y + view->scroll_y);
1497                 if (link) {
1498                         go_to_link (view, link);
1499                 }
1500         }
1501
1502         return FALSE;
1503 }
1504
1505 static gboolean
1506 ev_view_leave_notify_event (GtkWidget *widget, GdkEventCrossing   *event)
1507 {
1508         EvView *view = EV_VIEW (widget);
1509
1510         ev_view_set_status (view, NULL);
1511
1512         if (view->cursor == EV_VIEW_CURSOR_LINK ||
1513             view->cursor == EV_VIEW_CURSOR_IBEAM)
1514                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1515
1516         return FALSE;
1517 }
1518
1519 /*** Drawing ***/
1520
1521 static guint32
1522 ev_gdk_color_to_rgb (const GdkColor *color)
1523 {
1524   guint32 result;
1525   result = (0xff0000 | (color->red & 0xff00));
1526   result <<= 8;
1527   result |= ((color->green & 0xff00) | (color->blue >> 8));
1528   return result;
1529 }
1530
1531 static void
1532 draw_rubberband (GtkWidget *widget, GdkWindow *window,
1533                  const GdkRectangle *rect, guchar alpha)
1534 {
1535         GdkGC *gc;
1536         GdkPixbuf *pixbuf;
1537         GdkColor *fill_color_gdk;
1538         guint fill_color;
1539
1540         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
1541         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | alpha;
1542
1543         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
1544                                  rect->width, rect->height);
1545         gdk_pixbuf_fill (pixbuf, fill_color);
1546
1547         gdk_draw_pixbuf (window, NULL, pixbuf,
1548                          0, 0,
1549                          rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1550                          rect->width, rect->height,
1551                          GDK_RGB_DITHER_NONE,
1552                          0, 0);
1553
1554         g_object_unref (pixbuf);
1555
1556         gc = gdk_gc_new (window);
1557         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
1558         gdk_draw_rectangle (window, gc, FALSE,
1559                             rect->x - EV_VIEW (widget)->scroll_x, rect->y - EV_VIEW (widget)->scroll_y,
1560                             rect->width - 1,
1561                             rect->height - 1);
1562         g_object_unref (gc);
1563
1564         gdk_color_free (fill_color_gdk);
1565 }
1566
1567
1568 static void
1569 highlight_find_results (EvView *view, int page)
1570 {
1571         EvDocumentFind *find;
1572         int i, results = 0;
1573
1574         g_return_if_fail (EV_IS_DOCUMENT_FIND (view->document));
1575
1576         find = EV_DOCUMENT_FIND (view->document);
1577
1578         results = ev_document_find_get_n_results (find, page);
1579
1580         for (i = 0; i < results; i++) {
1581                 EvRectangle rectangle;
1582                 GdkRectangle view_rectangle;
1583                 guchar alpha;
1584
1585                 if (i == view->find_result && page == view->find_page) {
1586                         alpha = 0x90;
1587                 } else {
1588                         alpha = 0x20;
1589                 }
1590
1591                 ev_document_find_get_result (find, page,
1592                                              i, &rectangle);
1593                 doc_rect_to_view_rect (view, page, &rectangle, &view_rectangle);
1594                 draw_rubberband (GTK_WIDGET (view), GTK_WIDGET(view)->window,
1595                                  &view_rectangle, alpha);
1596         }
1597 }
1598
1599 static void
1600 draw_one_page (EvView          *view,
1601                gint             page,
1602                GdkRectangle    *page_area,
1603                GtkBorder       *border,
1604                GdkRectangle    *expose_area)
1605 {
1606         gint width, height;
1607         GdkPixbuf *current_pixbuf;
1608         GdkRectangle overlap;
1609         GdkRectangle real_page_area;
1610         EvViewSelection *selection;
1611
1612         g_assert (view->document);
1613         if (! gdk_rectangle_intersect (page_area, expose_area, &overlap))
1614                 return;
1615
1616         selection = find_selection_for_page (view, page);
1617         ev_page_cache_get_size (view->page_cache,
1618                                 page, view->orientation,
1619                                 view->scale,
1620                                 &width, &height);
1621         /* Render the document itself */
1622         real_page_area = *page_area;
1623
1624         real_page_area.x += border->left;
1625         real_page_area.y += border->top;
1626         real_page_area.width -= (border->left + border->right);
1627         real_page_area.height -= (border->top + border->bottom);
1628
1629         ev_document_misc_paint_one_page (GTK_WIDGET(view)->window,
1630                                          GTK_WIDGET (view),
1631                                          page_area, border);
1632
1633         if (gdk_rectangle_intersect (&real_page_area, expose_area, &overlap)) {
1634                 GdkPixbuf *selection_pixbuf = NULL;
1635                 GdkPixbuf *scaled_image;
1636                 GdkPixbuf *scaled_selection;
1637
1638                 current_pixbuf = ev_pixbuf_cache_get_pixbuf (view->pixbuf_cache, page);
1639
1640                 /* Get the selection pixbuf iff we have something to draw */
1641                 if (current_pixbuf && view->selection_mode == EV_VIEW_SELECTION_TEXT && selection)
1642                         selection_pixbuf = ev_pixbuf_cache_get_selection_pixbuf (view->pixbuf_cache,
1643                                                                                  page,
1644                                                                                  view->scale);
1645
1646                 if (current_pixbuf == NULL)
1647                         scaled_image = NULL;
1648                 else if (width == gdk_pixbuf_get_width (current_pixbuf) &&
1649                          height == gdk_pixbuf_get_height (current_pixbuf))
1650                         scaled_image = g_object_ref (current_pixbuf);
1651                 else
1652                         /* FIXME: We don't want to scale the whole area, just the right
1653                          * area of it */
1654                         scaled_image = gdk_pixbuf_scale_simple (current_pixbuf,
1655                                                                 width, height,
1656                                                                 GDK_INTERP_NEAREST);
1657
1658                 if (selection_pixbuf == NULL)
1659                         scaled_selection = NULL;
1660                 else if (width == gdk_pixbuf_get_width (selection_pixbuf) &&
1661                          height == gdk_pixbuf_get_height (selection_pixbuf))
1662                         scaled_selection = g_object_ref (selection_pixbuf);
1663                 else
1664                         /* FIXME: We don't want to scale the whole area, just the right
1665                          * area of it */
1666                         scaled_selection = gdk_pixbuf_scale_simple (selection_pixbuf,
1667                                                                     width, height,
1668                                                                     GDK_INTERP_NEAREST);
1669
1670                 if (scaled_image) {
1671                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1672                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1673                                          scaled_image,
1674                                          overlap.x - real_page_area.x,
1675                                          overlap.y - real_page_area.y,
1676                                          overlap.x, overlap.y,
1677                                          overlap.width, overlap.height,
1678                                          GDK_RGB_DITHER_NORMAL,
1679                                          0, 0);
1680                         g_object_unref (scaled_image);
1681                 }
1682
1683                 if (scaled_selection) {
1684                         gdk_draw_pixbuf (GTK_WIDGET(view)->window,
1685                                          GTK_WIDGET (view)->style->fg_gc[GTK_STATE_NORMAL],
1686                                          scaled_selection,
1687                                          overlap.x - real_page_area.x,
1688                                          overlap.y - real_page_area.y,
1689                                          overlap.x, overlap.y,
1690                                          overlap.width, overlap.height,
1691                                          GDK_RGB_DITHER_NORMAL,
1692                                          0, 0);
1693                         g_object_unref (scaled_selection);
1694                 }
1695         }
1696 }
1697
1698 /*** GObject functions ***/
1699
1700 static void
1701 ev_view_finalize (GObject *object)
1702 {
1703         EvView *view = EV_VIEW (object);
1704
1705         LOG ("Finalize");
1706
1707         g_free (view->status);
1708         g_free (view->find_status);
1709
1710         clear_selection (view);
1711
1712         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
1713 }
1714
1715 static void
1716 ev_view_destroy (GtkObject *object)
1717 {
1718         EvView *view = EV_VIEW (object);
1719
1720         if (view->document) {
1721                 g_object_unref (view->document);
1722                 view->document = NULL;
1723         }
1724         if (view->pixbuf_cache) {
1725                 g_object_unref (view->pixbuf_cache);
1726                 view->pixbuf_cache = NULL;
1727         }
1728         ev_view_set_scroll_adjustments (view, NULL, NULL);
1729
1730         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
1731 }
1732
1733 static void
1734 ev_view_set_property (GObject      *object,
1735                       guint         prop_id,
1736                       const GValue *value,
1737                       GParamSpec   *pspec)
1738 {
1739         EvView *view = EV_VIEW (object);
1740
1741         switch (prop_id)
1742         {
1743         case PROP_CONTINUOUS:
1744                 ev_view_set_continuous (view, g_value_get_boolean (value));
1745                 break;
1746         case PROP_DUAL_PAGE:
1747                 ev_view_set_dual_page (view, g_value_get_boolean (value));
1748                 break;
1749         case PROP_FULLSCREEN:
1750                 ev_view_set_fullscreen (view, g_value_get_boolean (value));
1751                 break;
1752         case PROP_PRESENTATION:
1753                 ev_view_set_presentation (view, g_value_get_boolean (value));
1754                 break;
1755         case PROP_SIZING_MODE:
1756                 ev_view_set_sizing_mode (view, g_value_get_enum (value));
1757                 break;
1758         case PROP_ZOOM:
1759                 ev_view_set_zoom (view, g_value_get_double (value), FALSE);
1760                 break;
1761         default:
1762                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1763         }
1764 }
1765
1766 static void
1767 ev_view_get_property (GObject *object,
1768                       guint prop_id,
1769                       GValue *value,
1770                       GParamSpec *pspec)
1771 {
1772         EvView *view = EV_VIEW (object);
1773
1774         switch (prop_id)
1775         {
1776         case PROP_STATUS:
1777                 g_value_set_string (value, view->status);
1778                 break;
1779         case PROP_FIND_STATUS:
1780                 g_value_set_string (value, view->status);
1781                 break;
1782         case PROP_CONTINUOUS:
1783                 g_value_set_boolean (value, view->continuous);
1784                 break;
1785         case PROP_DUAL_PAGE:
1786                 g_value_set_boolean (value, view->dual_page);
1787                 break;
1788         case PROP_FULLSCREEN:
1789                 g_value_set_boolean (value, view->fullscreen);
1790                 break;
1791         case PROP_PRESENTATION:
1792                 g_value_set_boolean (value, view->presentation);
1793                 break;
1794         case PROP_SIZING_MODE:
1795                 g_value_set_enum (value, view->sizing_mode);
1796                 break;
1797         case PROP_ZOOM:
1798                 g_value_set_double (value, view->scale);
1799                 break;
1800         default:
1801                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1802         }
1803 }
1804
1805 static void
1806 ev_view_class_init (EvViewClass *class)
1807 {
1808         GObjectClass *object_class = G_OBJECT_CLASS (class);
1809         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
1810         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
1811         GtkBindingSet *binding_set;
1812
1813         object_class->finalize = ev_view_finalize;
1814         object_class->set_property = ev_view_set_property;
1815         object_class->get_property = ev_view_get_property;
1816
1817         widget_class->expose_event = ev_view_expose_event;
1818         widget_class->button_press_event = ev_view_button_press_event;
1819         widget_class->motion_notify_event = ev_view_motion_notify_event;
1820         widget_class->button_release_event = ev_view_button_release_event;
1821         widget_class->size_request = ev_view_size_request;
1822         widget_class->size_allocate = ev_view_size_allocate;
1823         widget_class->realize = ev_view_realize;
1824         widget_class->unrealize = ev_view_unrealize;
1825         widget_class->scroll_event = ev_view_scroll_event;
1826         widget_class->leave_notify_event = ev_view_leave_notify_event;
1827         gtk_object_class->destroy = ev_view_destroy;
1828
1829         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
1830         class->binding_activated = ev_view_binding_activated;
1831
1832         widget_class->set_scroll_adjustments_signal =
1833             g_signal_new ("set-scroll-adjustments",
1834                           G_OBJECT_CLASS_TYPE (object_class),
1835                           G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1836                           G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
1837                           NULL, NULL,
1838                           ev_marshal_VOID__OBJECT_OBJECT,
1839                           G_TYPE_NONE, 2,
1840                           GTK_TYPE_ADJUSTMENT,
1841                           GTK_TYPE_ADJUSTMENT);
1842
1843         signals[SIGNAL_BINDING_ACTIVATED] = g_signal_new ("binding_activated",
1844                          G_TYPE_FROM_CLASS (object_class),
1845                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1846                          G_STRUCT_OFFSET (EvViewClass, binding_activated),
1847                          NULL, NULL,
1848                          ev_marshal_VOID__ENUM_BOOLEAN,
1849                          G_TYPE_NONE, 2,
1850                          GTK_TYPE_SCROLL_TYPE,
1851                          G_TYPE_BOOLEAN);
1852
1853         signals[SIGNAL_ZOOM_INVALID] = g_signal_new ("zoom-invalid",
1854                          G_TYPE_FROM_CLASS (object_class),
1855                          G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
1856                          G_STRUCT_OFFSET (EvViewClass, zoom_invalid),
1857                          NULL, NULL,
1858                          ev_marshal_VOID__VOID,
1859                          G_TYPE_NONE, 0, G_TYPE_NONE);
1860
1861         g_object_class_install_property (object_class,
1862                                          PROP_STATUS,
1863                                          g_param_spec_string ("status",
1864                                                               "Status Message",
1865                                                               "The status message",
1866                                                               NULL,
1867                                                               G_PARAM_READABLE));
1868
1869         g_object_class_install_property (object_class,
1870                                          PROP_FIND_STATUS,
1871                                          g_param_spec_string ("find-status",
1872                                                               "Find Status Message",
1873                                                               "The find status message",
1874                                                               NULL,
1875                                                               G_PARAM_READABLE));
1876
1877         g_object_class_install_property (object_class,
1878                                          PROP_CONTINUOUS,
1879                                          g_param_spec_boolean ("continuous",
1880                                                                "Continuous",
1881                                                                "Continuous scrolling mode",
1882                                                                TRUE,
1883                                                                G_PARAM_READWRITE));
1884
1885         g_object_class_install_property (object_class,
1886                                          PROP_DUAL_PAGE,
1887                                          g_param_spec_boolean ("dual-page",
1888                                                                "Dual Page",
1889                                                                "Two pages visible at once",
1890                                                                FALSE,
1891                                                                G_PARAM_READWRITE));
1892         g_object_class_install_property (object_class,
1893                                          PROP_FULLSCREEN,
1894                                          g_param_spec_boolean ("fullscreen",
1895                                                                "Full Screen",
1896                                                                "Draw page in a fullscreen fashion",
1897                                                                FALSE,
1898                                                                G_PARAM_READWRITE));
1899         g_object_class_install_property (object_class,
1900                                          PROP_PRESENTATION,
1901                                          g_param_spec_boolean ("presentation",
1902                                                                "Presentation",
1903                                                                "Draw page in presentation mode",
1904                                                                TRUE,
1905                                                                G_PARAM_READWRITE));
1906
1907         g_object_class_install_property (object_class,
1908                                          PROP_SIZING_MODE,
1909                                          g_param_spec_enum ("sizing-mode",
1910                                                             "Sizing Mode",
1911                                                             "Sizing Mode",
1912                                                             EV_TYPE_SIZING_MODE,
1913                                                             EV_SIZING_FIT_WIDTH,
1914                                                             G_PARAM_READWRITE));
1915
1916         g_object_class_install_property (object_class,
1917                                          PROP_ZOOM,
1918                                          g_param_spec_double ("zoom",
1919                                                               "Zoom factor",
1920                                                                "Zoom factor",
1921                                                                MIN_SCALE,
1922                                                                MAX_SCALE,
1923                                                                1.0,
1924                                                                G_PARAM_READWRITE));
1925
1926         binding_set = gtk_binding_set_by_class (class);
1927
1928         add_scroll_binding_keypad (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
1929         add_scroll_binding_keypad (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
1930         add_scroll_binding_keypad (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
1931         add_scroll_binding_keypad (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
1932 }
1933
1934 static void
1935 ev_view_init (EvView *view)
1936 {
1937         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
1938
1939         view->spacing = 5;
1940         view->scale = 1.0;
1941         view->current_page = 0;
1942         view->pressed_button = -1;
1943         view->cursor = EV_VIEW_CURSOR_NORMAL;
1944         view->drag_info.in_drag = FALSE;
1945         view->selection_info.in_selection = FALSE;
1946
1947         view->selection_mode = EV_VIEW_SELECTION_TEXT;
1948         view->continuous = TRUE;
1949         view->dual_page = FALSE;
1950         view->presentation = FALSE;
1951         view->fullscreen = FALSE;
1952         view->sizing_mode = EV_SIZING_FIT_WIDTH;
1953         view->pending_scroll = SCROLL_TO_KEEP_POSITION;
1954 }
1955
1956 /*** Callbacks ***/
1957
1958 static void
1959 find_changed_cb (EvDocument *document, int page, EvView *view)
1960 {
1961         jump_to_find_page (view);
1962         jump_to_find_result (view);
1963         update_find_status_message (view);
1964
1965         if (view->current_page == page)
1966                 gtk_widget_queue_draw (GTK_WIDGET (view));
1967 }
1968
1969 static void
1970 job_finished_cb (EvPixbufCache *pixbuf_cache,
1971                  EvView        *view)
1972 {
1973         gtk_widget_queue_draw (GTK_WIDGET (view));
1974 }
1975
1976 static void
1977 page_changed_cb (EvPageCache *page_cache,
1978                  int          new_page,
1979                  EvView      *view)
1980 {
1981         if (view->current_page != new_page) {
1982
1983                 view->current_page = new_page;
1984                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
1985                 gtk_widget_queue_resize (GTK_WIDGET (view));
1986
1987                 if (EV_IS_DOCUMENT_FIND (view->document)) {
1988                         view->find_page = new_page;
1989                         view->find_result = 0;
1990                         update_find_status_message (view);
1991                 }
1992         }
1993 }
1994
1995 static void on_adjustment_value_changed (GtkAdjustment  *adjustment,
1996                                          EvView *view)
1997 {
1998         int dx = 0, dy = 0;
1999
2000         if (! GTK_WIDGET_REALIZED (view))
2001                 return;
2002
2003         if (view->hadjustment) {
2004                 dx = view->scroll_x - (int) view->hadjustment->value;
2005                 view->scroll_x = (int) view->hadjustment->value;
2006         } else {
2007                 view->scroll_x = 0;
2008         }
2009
2010         if (view->vadjustment) {
2011                 dy = view->scroll_y - (int) view->vadjustment->value;
2012                 view->scroll_y = (int) view->vadjustment->value;
2013         } else {
2014                 view->scroll_y = 0;
2015         }
2016
2017
2018         if (view->pending_resize)
2019                 gtk_widget_queue_draw (GTK_WIDGET (view));
2020         else
2021                 gdk_window_scroll (GTK_WIDGET (view)->window, dx, dy);
2022
2023
2024         if (view->document)
2025                 view_update_range_and_current_page (view);
2026 }
2027
2028 GtkWidget*
2029 ev_view_new (void)
2030 {
2031         GtkWidget *view;
2032
2033         view = g_object_new (EV_TYPE_VIEW, NULL);
2034
2035         return view;
2036 }
2037
2038 static void
2039 setup_caches (EvView *view)
2040 {
2041         view->page_cache = ev_page_cache_get (view->document);
2042         g_signal_connect (view->page_cache, "page-changed", G_CALLBACK (page_changed_cb), view);
2043         view->pixbuf_cache = ev_pixbuf_cache_new (view->document);
2044         g_signal_connect (view->pixbuf_cache, "job-finished", G_CALLBACK (job_finished_cb), view);
2045 }
2046
2047 static void
2048 clear_caches (EvView *view)
2049 {
2050         if (view->pixbuf_cache) {
2051                 g_object_unref (view->pixbuf_cache);
2052                 view->pixbuf_cache = NULL;
2053         }
2054
2055         if (view->page_cache) {
2056                 g_object_unref (view->page_cache);
2057                 view->page_cache = NULL;
2058         }
2059 }
2060
2061 void
2062 ev_view_set_document (EvView     *view,
2063                       EvDocument *document)
2064 {
2065         g_return_if_fail (EV_IS_VIEW (view));
2066
2067         if (document != view->document) {
2068                 clear_caches (view);
2069
2070                 if (view->document) {
2071                         g_signal_handlers_disconnect_by_func (view->document,
2072                                                               find_changed_cb,
2073                                                               view);
2074                         g_object_unref (view->document);
2075                         view->page_cache = NULL;
2076
2077                 }
2078
2079                 view->document = document;
2080                 view->find_page = 0;
2081                 view->find_result = 0;
2082
2083                 if (view->document) {
2084                         g_object_ref (view->document);
2085                         if (EV_IS_DOCUMENT_FIND (view->document)) {
2086                                 g_signal_connect (view->document,
2087                                                   "find_changed",
2088                                                   G_CALLBACK (find_changed_cb),
2089                                                   view);
2090                         }
2091
2092                         setup_caches (view);
2093                 }
2094
2095                 gtk_widget_queue_resize (GTK_WIDGET (view));
2096         }
2097 }
2098
2099 /*** Zoom and sizing mode ***/
2100
2101 #define EPSILON 0.0000001
2102 void
2103 ev_view_set_zoom (EvView   *view,
2104                   double    factor,
2105                   gboolean  relative)
2106 {
2107         double scale;
2108
2109         if (relative)
2110                 scale = view->scale * factor;
2111         else
2112                 scale = factor;
2113
2114         scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
2115
2116         if (ABS (view->scale - scale) < EPSILON)
2117                 return;
2118
2119         view->scale = scale;
2120         view->pending_resize = TRUE;
2121
2122         gtk_widget_queue_resize (GTK_WIDGET (view));
2123
2124         g_object_notify (G_OBJECT (view), "zoom");
2125 }
2126
2127 double
2128 ev_view_get_zoom (EvView *view)
2129 {
2130         return view->scale;
2131 }
2132
2133 gboolean
2134 ev_view_get_continuous (EvView *view)
2135 {
2136         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2137
2138         return view->continuous;
2139 }
2140
2141 void
2142 ev_view_set_continuous (EvView   *view,
2143                         gboolean  continuous)
2144 {
2145         g_return_if_fail (EV_IS_VIEW (view));
2146
2147         continuous = continuous != FALSE;
2148
2149         if (view->continuous != continuous) {
2150                 view->continuous = continuous;
2151                 view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2152                 gtk_widget_queue_resize (GTK_WIDGET (view));
2153         }
2154
2155         g_object_notify (G_OBJECT (view), "continuous");
2156 }
2157
2158 gboolean
2159 ev_view_get_dual_page (EvView *view)
2160 {
2161         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2162
2163         return view->dual_page;
2164 }
2165
2166 void
2167 ev_view_set_dual_page (EvView   *view,
2168                        gboolean  dual_page)
2169 {
2170         g_return_if_fail (EV_IS_VIEW (view));
2171
2172         dual_page = dual_page != FALSE;
2173
2174         if (view->dual_page == dual_page)
2175                 return;
2176
2177         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2178         view->dual_page = dual_page;
2179         /* FIXME: if we're keeping the pixbuf cache around, we should extend the
2180          * preload_cache_size to be 2 if dual_page is set.
2181          */
2182         gtk_widget_queue_resize (GTK_WIDGET (view));
2183
2184         g_object_notify (G_OBJECT (view), "dual-page");
2185 }
2186
2187 void
2188 ev_view_set_fullscreen (EvView   *view,
2189                          gboolean  fullscreen)
2190 {
2191         g_return_if_fail (EV_IS_VIEW (view));
2192
2193         fullscreen = fullscreen != FALSE;
2194
2195         if (view->fullscreen == fullscreen)
2196                 return;
2197
2198         view->fullscreen = fullscreen;
2199         gtk_widget_queue_resize (GTK_WIDGET (view));
2200
2201         g_object_notify (G_OBJECT (view), "fullscreen");
2202 }
2203
2204 gboolean
2205 ev_view_get_fullscreen (EvView *view)
2206 {
2207         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2208
2209         return view->fullscreen;
2210 }
2211
2212 void
2213 ev_view_set_presentation (EvView   *view,
2214                           gboolean  presentation)
2215 {
2216         g_return_if_fail (EV_IS_VIEW (view));
2217
2218         presentation = presentation != FALSE;
2219
2220         if (view->presentation == presentation)
2221                 return;
2222
2223         view->presentation = presentation;
2224         view->pending_scroll = SCROLL_TO_CURRENT_PAGE;
2225         gtk_widget_queue_resize (GTK_WIDGET (view));
2226
2227         if (GTK_WIDGET_REALIZED (view)) {
2228                 if (view->presentation)
2229                         gdk_window_set_background (GTK_WIDGET(view)->window,
2230                                                    &GTK_WIDGET (view)->style->black);
2231                 else
2232                         gdk_window_set_background (GTK_WIDGET(view)->window,
2233                                                    &GTK_WIDGET (view)->style->mid [GTK_STATE_NORMAL]);
2234         }
2235
2236
2237         g_object_notify (G_OBJECT (view), "presentation");
2238 }
2239
2240 gboolean
2241 ev_view_get_presentation (EvView *view)
2242 {
2243         g_return_val_if_fail (EV_IS_VIEW (view), FALSE);
2244
2245         return view->presentation;
2246 }
2247
2248 void
2249 ev_view_set_sizing_mode (EvView       *view,
2250                          EvSizingMode  sizing_mode)
2251 {
2252         g_return_if_fail (EV_IS_VIEW (view));
2253
2254         if (view->sizing_mode == sizing_mode)
2255                 return;
2256
2257         view->sizing_mode = sizing_mode;
2258         gtk_widget_queue_resize (GTK_WIDGET (view));
2259
2260         g_object_notify (G_OBJECT (view), "sizing-mode");
2261 }
2262
2263 EvSizingMode
2264 ev_view_get_sizing_mode (EvView *view)
2265 {
2266         g_return_val_if_fail (EV_IS_VIEW (view), EV_SIZING_FREE);
2267
2268         return view->sizing_mode;
2269 }
2270
2271 gboolean
2272 ev_view_can_zoom_in (EvView *view)
2273 {
2274         return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
2275 }
2276
2277 gboolean
2278 ev_view_can_zoom_out (EvView *view)
2279 {
2280         return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
2281 }
2282
2283 void
2284 ev_view_zoom_in (EvView *view)
2285 {
2286         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2287
2288         view->pending_scroll = SCROLL_TO_CENTER;
2289         ev_view_set_zoom (view, ZOOM_IN_FACTOR, TRUE);
2290 }
2291
2292 void
2293 ev_view_zoom_out (EvView *view)
2294 {
2295         g_return_if_fail (view->sizing_mode == EV_SIZING_FREE);
2296
2297         view->pending_scroll = SCROLL_TO_CENTER;
2298         ev_view_set_zoom (view, ZOOM_OUT_FACTOR, TRUE);
2299 }
2300
2301 static void
2302 ev_view_set_orientation (EvView         *view,
2303                          EvOrientation   orientation)
2304 {
2305         view->orientation = orientation;
2306
2307         gtk_widget_queue_resize (GTK_WIDGET (view));
2308 }
2309
2310 void
2311 ev_view_rotate_right (EvView *view)
2312 {
2313         EvOrientation orientation;
2314
2315         if (view->orientation == EV_ORIENTATION_PORTRAIT) {
2316                 orientation = EV_ORIENTATION_LANDSCAPE;
2317         } else if (view->orientation == EV_ORIENTATION_LANDSCAPE) {
2318                 orientation = EV_ORIENTATION_UPSIDEDOWN;
2319         } else if (view->orientation == EV_ORIENTATION_UPSIDEDOWN) {
2320                 orientation = EV_ORIENTATION_SEASCAPE;
2321         } else {
2322                 orientation = EV_ORIENTATION_PORTRAIT;
2323         }
2324
2325         ev_view_set_orientation (view, orientation);
2326 }
2327
2328 void
2329 ev_view_rotate_left (EvView *view)
2330 {
2331         EvOrientation orientation;
2332
2333         if (view->orientation == EV_ORIENTATION_PORTRAIT) {
2334                 orientation = EV_ORIENTATION_SEASCAPE;
2335         } else if (view->orientation == EV_ORIENTATION_SEASCAPE) {
2336                 orientation = EV_ORIENTATION_UPSIDEDOWN;
2337         } else if (view->orientation == EV_ORIENTATION_UPSIDEDOWN) {
2338                 orientation = EV_ORIENTATION_LANDSCAPE;
2339         } else {
2340                 orientation = EV_ORIENTATION_PORTRAIT;
2341         }
2342
2343         ev_view_set_orientation (view, orientation);
2344 }
2345
2346 static double
2347 zoom_for_size_fit_width (int doc_width,
2348                          int doc_height,
2349                          int target_width,
2350                          int target_height,
2351                          int vsb_width)
2352 {
2353         double scale;
2354
2355         scale = (double)target_width / doc_width;
2356
2357         if (doc_height * scale > target_height)
2358                 scale = (double) (target_width - vsb_width) / doc_width;
2359
2360         return scale;
2361 }
2362
2363 static double
2364 zoom_for_size_best_fit (int doc_width,
2365                         int doc_height,
2366                         int target_width,
2367                         int target_height,
2368                         int vsb_width,
2369                         int hsb_width)
2370 {
2371         double w_scale;
2372         double h_scale;
2373
2374         w_scale = (double)target_width / doc_width;
2375         h_scale = (double)target_height / doc_height;
2376
2377         if (doc_height * w_scale > target_height)
2378                 w_scale = (double) (target_width - vsb_width) / doc_width;
2379         if (doc_width * h_scale > target_width)
2380                 h_scale = (double) (target_height - hsb_width) / doc_height;
2381
2382         return MIN (w_scale, h_scale);
2383 }
2384
2385
2386 static void
2387 ev_view_zoom_for_size_presentation (EvView *view,
2388                                     int     width,
2389                                     int     height)
2390 {
2391         int doc_width, doc_height;
2392         gdouble scale;
2393
2394         ev_page_cache_get_size (view->page_cache,
2395                                 view->current_page,
2396                                 view->orientation,
2397                                 1.0,
2398                                 &doc_width,
2399                                 &doc_height);
2400         scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, 0, 0);
2401         ev_view_set_zoom (view, scale, FALSE);
2402 }
2403
2404 static void
2405 ev_view_zoom_for_size_continuous_and_dual_page (EvView *view,
2406                            int     width,
2407                            int     height,
2408                            int     vsb_width,
2409                            int     hsb_height)
2410 {
2411         int doc_width, doc_height;
2412         GtkBorder border;
2413         gdouble scale;
2414
2415         ev_page_cache_get_max_width (view->page_cache,
2416                                      view->orientation,
2417                                      1.0,
2418                                      &doc_width);
2419         ev_page_cache_get_max_height (view->page_cache,
2420                                       view->orientation,
2421                                       1.0,
2422                                       &doc_height);
2423         compute_border (view, doc_width, doc_height, &border);
2424
2425         doc_width = doc_width * 2;
2426         width -= (2 * (border.left + border.right) + 3 * view->spacing);
2427         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2428
2429         /* FIXME: We really need to calculate the overall height here, not the
2430          * page height.  We assume there's always a vertical scrollbar for
2431          * now.  We need to fix this. */
2432         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2433                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2434         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2435                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2436         else
2437                 g_assert_not_reached ();
2438
2439         ev_view_set_zoom (view, scale, FALSE);
2440 }
2441
2442 static void
2443 ev_view_zoom_for_size_continuous (EvView *view,
2444                                   int     width,
2445                                   int     height,
2446                                   int     vsb_width,
2447                                   int     hsb_height)
2448 {
2449         int doc_width, doc_height;
2450         GtkBorder border;
2451         gdouble scale;
2452
2453         ev_page_cache_get_max_width (view->page_cache,
2454                                      view->orientation,
2455                                      1.0,
2456                                      &doc_width);
2457         ev_page_cache_get_max_height (view->page_cache,
2458                                       view->orientation,
2459                                       1.0,
2460                                       &doc_height);
2461         compute_border (view, doc_width, doc_height, &border);
2462
2463         width -= (border.left + border.right + 2 * view->spacing);
2464         height -= (border.top + border.bottom + 2 * view->spacing - 1);
2465
2466         /* FIXME: We really need to calculate the overall height here, not the
2467          * page height.  We assume there's always a vertical scrollbar for
2468          * now.  We need to fix this. */
2469         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2470                 scale = zoom_for_size_fit_width (doc_width, doc_height, width - vsb_width, height, 0);
2471         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2472                 scale = zoom_for_size_best_fit (doc_width, doc_height, width - vsb_width, height, 0, hsb_height);
2473         else
2474                 g_assert_not_reached ();
2475
2476         ev_view_set_zoom (view, scale, FALSE);
2477 }
2478
2479 static void
2480 ev_view_zoom_for_size_dual_page (EvView *view,
2481                                  int     width,
2482                                  int     height,
2483                                  int     vsb_width,
2484                                  int     hsb_height)
2485 {
2486         GtkBorder border;
2487         gint doc_width, doc_height;
2488         gdouble scale;
2489         gint other_page;
2490
2491         other_page = view->current_page ^ 1;
2492
2493         /* Find the largest of the two. */
2494         ev_page_cache_get_size (view->page_cache,
2495                                 view->current_page,
2496                                 view->orientation,
2497                                 1.0,
2498                                 &doc_width, &doc_height);
2499
2500         if (other_page < ev_page_cache_get_n_pages (view->page_cache)) {
2501                 gint width_2, height_2;
2502                 ev_page_cache_get_size (view->page_cache,
2503                                         other_page,
2504                                         view->orientation,
2505                                         1.0,
2506                                         &width_2, &height_2);
2507                 if (width_2 > doc_width)
2508                         doc_width = width_2;
2509                 if (height_2 > doc_height)
2510                         doc_height = height_2;
2511         }
2512         compute_border (view, doc_width, doc_height, &border);
2513
2514         doc_width = doc_width * 2;
2515         width -= ((border.left + border.right)* 2 + 3 * view->spacing);
2516         height -= (border.top + border.bottom + 2 * view->spacing);
2517
2518         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2519                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2520         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2521                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2522         else
2523                 g_assert_not_reached ();
2524
2525         ev_view_set_zoom (view, scale, FALSE);
2526 }
2527
2528 static void
2529 ev_view_zoom_for_size_single_page (EvView *view,
2530                                    int     width,
2531                                    int     height,
2532                                    int     vsb_width,
2533                                    int     hsb_height)
2534 {
2535         int doc_width, doc_height;
2536         GtkBorder border;
2537         gdouble scale;
2538
2539         ev_page_cache_get_size (view->page_cache,
2540                                 view->current_page,
2541                                 view->orientation,
2542                                 1.0,
2543                                 &doc_width,
2544                                 &doc_height);
2545         /* Get an approximate border */
2546         compute_border (view, width, height, &border);
2547
2548         width -= (border.left + border.right + 2 * view->spacing);
2549         height -= (border.top + border.bottom + 2 * view->spacing);
2550
2551         if (view->sizing_mode == EV_SIZING_FIT_WIDTH)
2552                 scale = zoom_for_size_fit_width (doc_width, doc_height, width, height, vsb_width);
2553         else if (view->sizing_mode == EV_SIZING_BEST_FIT)
2554                 scale = zoom_for_size_best_fit (doc_width, doc_height, width, height, vsb_width, hsb_height);
2555         else
2556                 g_assert_not_reached ();
2557
2558         ev_view_set_zoom (view, scale, FALSE);
2559 }
2560
2561 void
2562 ev_view_set_zoom_for_size (EvView *view,
2563                            int     width,
2564                            int     height,
2565                            int     vsb_width,
2566                            int     hsb_height)
2567 {
2568         g_return_if_fail (view->sizing_mode == EV_SIZING_FIT_WIDTH ||
2569                           view->sizing_mode == EV_SIZING_BEST_FIT);
2570         g_return_if_fail (width >= 0);
2571         g_return_if_fail (height >= 0);
2572
2573         if (view->document == NULL)
2574                 return;
2575
2576         if (view->presentation)
2577                 ev_view_zoom_for_size_presentation (view, width, height);
2578         else if (view->continuous && view->dual_page)
2579                 ev_view_zoom_for_size_continuous_and_dual_page (view, width, height, vsb_width, hsb_height);
2580         else if (view->continuous)
2581                 ev_view_zoom_for_size_continuous (view, width, height, vsb_width, hsb_height);
2582         else if (view->dual_page)
2583                 ev_view_zoom_for_size_dual_page (view, width, height, vsb_width, hsb_height);
2584         else
2585                 ev_view_zoom_for_size_single_page (view, width, height, vsb_width, hsb_height);
2586 }
2587
2588 /*** Status text messages ***/
2589
2590 const char *
2591 ev_view_get_status (EvView *view)
2592 {
2593         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2594
2595         return view->status;
2596 }
2597
2598 static void
2599 ev_view_set_status (EvView *view, const char *message)
2600 {
2601         g_return_if_fail (EV_IS_VIEW (view));
2602
2603         if (message != view->status) {
2604                 g_free (view->status);
2605                 view->status = g_strdup (message);
2606                 g_object_notify (G_OBJECT (view), "status");
2607         }
2608 }
2609
2610 static void
2611 update_find_status_message (EvView *view)
2612 {
2613         char *message;
2614
2615         if (view->current_page == view->find_page) {
2616                 int results;
2617
2618                 results = ev_document_find_get_n_results
2619                                 (EV_DOCUMENT_FIND (view->document),
2620                                  view->current_page);
2621                 /* TRANS: Sometimes this could be better translated as
2622                    "%d hit(s) on this page".  Therefore this string
2623                    contains plural cases. */
2624                 message = g_strdup_printf (ngettext ("%d found on this page",
2625                                                      "%d found on this page",
2626                                                      results),
2627                                            results);
2628         } else {
2629                 double percent;
2630
2631                 percent = ev_document_find_get_progress
2632                                 (EV_DOCUMENT_FIND (view->document));
2633                 if (percent >= (1.0 - 1e-10)) {
2634                         message = g_strdup (_("Not found"));
2635                 } else {
2636                         message = g_strdup_printf (_("%3d%% remaining to search"),
2637                                                    (int) ((1.0 - percent) * 100));
2638                 }
2639
2640         }
2641         ev_view_set_find_status (view, message);
2642         g_free (message);
2643 }
2644
2645 const char *
2646 ev_view_get_find_status (EvView *view)
2647 {
2648         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
2649
2650         return view->find_status;
2651 }
2652
2653 static void
2654 ev_view_set_find_status (EvView *view, const char *message)
2655 {
2656         g_return_if_fail (EV_IS_VIEW (view));
2657
2658         g_free (view->find_status);
2659         view->find_status = g_strdup (message);
2660         g_object_notify (G_OBJECT (view), "find-status");
2661 }
2662
2663 /*** Find ***/
2664
2665 static void
2666 jump_to_find_result (EvView *view)
2667 {
2668         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2669         EvRectangle rect;
2670         GdkRectangle view_rect;
2671         int n_results;
2672         int page = view->find_page;
2673
2674         n_results = ev_document_find_get_n_results (find, page);
2675
2676         if (n_results > view->find_result) {
2677                 ev_document_find_get_result
2678                         (find, page, view->find_result, &rect);
2679
2680                 doc_rect_to_view_rect (view, page, &rect, &view_rect);
2681                 ensure_rectangle_is_visible (view, &view_rect);
2682         }
2683 }
2684
2685 static void
2686 jump_to_find_page (EvView *view)
2687 {
2688         int n_pages, i;
2689
2690         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2691
2692         for (i = 0; i < n_pages; i++) {
2693                 int has_results;
2694                 int page;
2695
2696                 page = i + view->find_page;
2697                 if (page >= n_pages) {
2698                         page = page - n_pages;
2699                 }
2700
2701                 has_results = ev_document_find_page_has_results
2702                                 (EV_DOCUMENT_FIND (view->document), page);
2703                 if (has_results == -1) {
2704                         view->find_page = page;
2705                         break;
2706                 } else if (has_results == 1) {
2707                         ev_page_cache_set_current_page (view->page_cache, page);
2708                         jump_to_find_result (view);
2709                         break;
2710                 }
2711         }
2712 }
2713
2714 gboolean
2715 ev_view_can_find_next (EvView *view)
2716 {
2717         int n_results = 0;
2718
2719         if (EV_IS_DOCUMENT_FIND (view->document)) {
2720                 EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2721
2722                 n_results = ev_document_find_get_n_results (find, view->current_page);
2723         }
2724
2725         return n_results > 0;
2726 }
2727
2728 void
2729 ev_view_find_next (EvView *view)
2730 {
2731         EvPageCache *page_cache;
2732         int n_results, n_pages;
2733         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2734
2735         page_cache = ev_page_cache_get (view->document);
2736         n_results = ev_document_find_get_n_results (find, view->current_page);
2737
2738         n_pages = ev_page_cache_get_n_pages (page_cache);
2739
2740         view->find_result++;
2741
2742         if (view->find_result >= n_results) {
2743                 view->find_result = 0;
2744                 view->find_page++;
2745
2746                 if (view->find_page >= n_pages) {
2747                         view->find_page = 0;
2748                 }
2749
2750                 jump_to_find_page (view);
2751         } else {
2752                 jump_to_find_result (view);
2753                 gtk_widget_queue_draw (GTK_WIDGET (view));
2754         }
2755 }
2756
2757 void
2758 ev_view_find_previous (EvView *view)
2759 {
2760         int n_results, n_pages;
2761         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
2762         EvPageCache *page_cache;
2763
2764         page_cache = ev_page_cache_get (view->document);
2765
2766         n_results = ev_document_find_get_n_results (find, view->current_page);
2767
2768         n_pages = ev_page_cache_get_n_pages (page_cache);
2769
2770         view->find_result--;
2771
2772         if (view->find_result < 0) {
2773                 view->find_result = 0;
2774                 view->find_page--;
2775
2776                 if (view->find_page < 0) {
2777                         view->find_page = n_pages - 1;
2778                 }
2779
2780                 jump_to_find_page (view);
2781         } else {
2782                 jump_to_find_result (view);
2783                 gtk_widget_queue_draw (GTK_WIDGET (view));
2784         }
2785 }
2786
2787 /*** Selections ***/
2788
2789 /* compute_new_selection_rect/text calculates the area currently selected by
2790  * view_rect.  each handles a different mode;
2791  */
2792 static GList *
2793 compute_new_selection_rect (EvView       *view,
2794                             GdkPoint     *start,
2795                             GdkPoint     *stop)
2796 {
2797         GdkRectangle view_rect;
2798         int n_pages, i;
2799         GList *list = NULL;
2800
2801         g_assert (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE);
2802
2803         view_rect.x = MIN (start->x, stop->x);
2804         view_rect.y = MIN (start->y, stop->y);
2805         view_rect.width = MAX (start->x, stop->x) - view_rect.x;
2806         view_rect.width = MAX (start->y, stop->y) - view_rect.y;
2807
2808         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2809
2810         for (i = 0; i < n_pages; i++) {
2811                 GdkRectangle page_area;
2812                 GtkBorder border;
2813
2814                 if (get_page_extents (view, i, &page_area, &border)) {
2815                         GdkRectangle overlap;
2816
2817                         if (gdk_rectangle_intersect (&page_area, &view_rect, &overlap)) {
2818                                 EvViewSelection *selection;
2819
2820                                 selection = g_new0 (EvViewSelection, 1);
2821                                 selection->page = i;
2822                                 view_rect_to_doc_rect (view, &overlap, &page_area,
2823                                                        &(selection->rect));
2824
2825                                 list = g_list_append (list, selection);
2826                         }
2827                 }
2828         }
2829
2830         return list;
2831 }
2832
2833 static gboolean
2834 gdk_rectangle_point_in (GdkRectangle *rectangle,
2835                         GdkPoint     *point)
2836 {
2837         return rectangle->x <= point->x &&
2838                 rectangle->y <= point->y &&
2839                 point->x < rectangle->x + rectangle->width &&
2840                 point->y < rectangle->y + rectangle->height;
2841 }
2842
2843 static GList *
2844 compute_new_selection_text (EvView   *view,
2845                             GdkPoint *start,
2846                             GdkPoint *stop)
2847 {
2848         int n_pages, i, first, last;
2849         GList *list = NULL;
2850         EvViewSelection *selection;
2851         gint width, height;
2852
2853         g_assert (view->selection_mode == EV_VIEW_SELECTION_TEXT);
2854
2855         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2856
2857         /* First figure out the range of pages the selection
2858          * affects. */
2859         first = n_pages;
2860         last = 0;
2861         for (i = 0; i < n_pages; i++) {
2862                 GdkRectangle page_area;
2863                 GtkBorder border;
2864
2865                 get_page_extents (view, i, &page_area, &border);
2866                 if (gdk_rectangle_point_in (&page_area, start) ||
2867                     gdk_rectangle_point_in (&page_area, stop)) {
2868                         if (first == n_pages)
2869                                 first = i;
2870                         last = i;
2871                 }
2872
2873         }
2874
2875
2876
2877         /* Now create a list of EvViewSelection's for the affected
2878          * pages.  This could be an empty list, a list of just one
2879          * page or a number of pages.*/
2880         for (i = first; i < last + 1; i++) {
2881                 GdkRectangle page_area;
2882                 GtkBorder border;
2883                 GdkPoint *point;
2884
2885                 ev_page_cache_get_size (view->page_cache, i,
2886                                         view->orientation,
2887                                         1.0, &width, &height);
2888
2889                 selection = g_new0 (EvViewSelection, 1);
2890                 selection->page = i;
2891                 selection->rect.x1 = selection->rect.y1 = 0;
2892                 selection->rect.x2 = width;
2893                 selection->rect.y2 = height;
2894
2895                 get_page_extents (view, i, &page_area, &border);
2896
2897                 if (gdk_rectangle_point_in (&page_area, start))
2898                         point = start;
2899                 else
2900                         point = stop;
2901
2902                 if (i == first)
2903                         view_point_to_doc_point (view, point, &page_area,
2904                                                  &selection->rect.x1,
2905                                                  &selection->rect.y1);
2906
2907                 /* If the selection is contained within just one page,
2908                  * make sure we don't write 'start' into both points
2909                  * in selection->rect. */
2910                 if (first == last)
2911                         point = stop;
2912
2913                 if (i == last)
2914                         view_point_to_doc_point (view, point, &page_area,
2915                                                  &selection->rect.x2,
2916                                                  &selection->rect.y2);
2917
2918                 list = g_list_append (list, selection);
2919         }
2920
2921         return list;
2922 }
2923
2924 /* This function takes the newly calculated list, and figures out which regions
2925  * have changed.  It then queues a redraw approporiately.
2926  */
2927 static void
2928 merge_selection_region (EvView *view,
2929                         GList  *list)
2930 {
2931
2932         /* FIXME: actually write... */
2933         clear_selection (view);
2934         gtk_widget_queue_draw (GTK_WIDGET (view));
2935
2936         view->selection_info.selections = list;
2937         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, list);
2938 }
2939
2940 static void
2941 compute_selections (EvView   *view,
2942                     GdkPoint *start,
2943                     GdkPoint *stop)
2944 {
2945         GList *list;
2946
2947         if (view->selection_mode == EV_VIEW_SELECTION_RECTANGLE)
2948                 list = compute_new_selection_rect (view, start, stop);
2949         else
2950                 list = compute_new_selection_text (view, start, stop);
2951         merge_selection_region (view, list);
2952 }
2953
2954 /* Free's the selection.  It's up to the caller to queue redraws if needed.
2955  */
2956 static void
2957 selection_free (EvViewSelection *selection)
2958 {
2959         g_free (selection);
2960 }
2961
2962 static void
2963 clear_selection (EvView *view)
2964 {
2965         g_list_foreach (view->selection_info.selections, (GFunc)selection_free, NULL);
2966         view->selection_info.selections = NULL;
2967         view->selection_info.in_selection = FALSE;
2968 }
2969
2970
2971 void
2972 ev_view_select_all (EvView *view)
2973 {
2974         int n_pages, i;
2975
2976         clear_selection (view);
2977
2978         n_pages = ev_page_cache_get_n_pages (view->page_cache);
2979         for (i = 0; i < n_pages; i++) {
2980                 int width, height;
2981                 EvViewSelection *selection;
2982
2983                 ev_page_cache_get_size (view->page_cache,
2984                                         view->orientation,
2985                                         i, 1.0, &width, &height);
2986
2987                 selection = g_new0 (EvViewSelection, 1);
2988                 selection->page = i;
2989                 selection->rect.x1 = selection->rect.y1 = 0;
2990                 selection->rect.x2 = width;
2991                 selection->rect.y2 = height;
2992
2993                 view->selection_info.selections = g_list_append (view->selection_info.selections, selection);
2994         }
2995
2996         ev_pixbuf_cache_set_selection_list (view->pixbuf_cache, view->selection_info.selections);
2997         gtk_widget_queue_draw (GTK_WIDGET (view));
2998 }
2999
3000 static char *
3001 get_selected_text (EvView *ev_view)
3002 {
3003         GString *text;
3004         GList *l;
3005
3006         text = g_string_new (NULL);
3007
3008         ev_document_doc_mutex_lock ();
3009
3010         for (l = ev_view->selection_info.selections; l != NULL; l = l->next) {
3011                 EvViewSelection *selection = (EvViewSelection *)l->data;
3012                 char *tmp;
3013
3014                 tmp = ev_document_get_text (ev_view->document,
3015                                             selection->page,
3016                                             &selection->rect);
3017                 g_string_append (text, tmp);
3018                 g_free (tmp);
3019         }
3020
3021         ev_document_doc_mutex_unlock ();
3022
3023         return g_string_free (text, FALSE);
3024 }
3025
3026 void
3027 ev_view_copy (EvView *ev_view)
3028 {
3029         GtkClipboard *clipboard;
3030         char *text;
3031
3032         if (!ev_document_can_get_text (ev_view->document)) {
3033                 return;
3034         }
3035
3036         text = get_selected_text (ev_view);
3037         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3038                                               GDK_SELECTION_CLIPBOARD);
3039         gtk_clipboard_set_text (clipboard, text, -1);
3040         g_free (text);
3041 }
3042
3043 static void
3044 ev_view_primary_get_cb (GtkClipboard     *clipboard,
3045                         GtkSelectionData *selection_data,
3046                         guint             info,
3047                         gpointer          data)
3048 {
3049         EvView *ev_view = EV_VIEW (data);
3050         char *text;
3051
3052         if (!ev_document_can_get_text (ev_view->document)) {
3053                 return;
3054         }
3055
3056         text = get_selected_text (ev_view);
3057         gtk_selection_data_set_text (selection_data, text, -1);
3058         g_free (text);
3059 }
3060
3061 static void
3062 ev_view_primary_clear_cb (GtkClipboard *clipboard,
3063                           gpointer      data)
3064 {
3065         EvView *view = EV_VIEW (data);
3066
3067         clear_selection (view);
3068 }
3069
3070 static void
3071 ev_view_update_primary_selection (EvView *ev_view)
3072 {
3073         GtkClipboard *clipboard;
3074
3075         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
3076                                               GDK_SELECTION_PRIMARY);
3077
3078         if (ev_view->selection_info.selections) {
3079                 if (!gtk_clipboard_set_with_owner (clipboard,
3080                                                    targets,
3081                                                    G_N_ELEMENTS (targets),
3082                                                    ev_view_primary_get_cb,
3083                                                    ev_view_primary_clear_cb,
3084                                                    G_OBJECT (ev_view)))
3085                         ev_view_primary_clear_cb (clipboard, ev_view);
3086         } else {
3087                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
3088                         gtk_clipboard_clear (clipboard);
3089         }
3090 }
3091
3092 /*** Cursor operations ***/
3093
3094 static GdkCursor *
3095 ev_view_create_invisible_cursor(void)
3096 {
3097        GdkBitmap *empty;
3098        GdkColor black = { 0, 0, 0, 0 };
3099        static char bits[] = { 0x00 };
3100
3101        empty = gdk_bitmap_create_from_data (NULL, bits, 1, 1);
3102
3103        return gdk_cursor_new_from_pixmap (empty, empty, &black, &black, 0, 0);
3104 }
3105
3106 static void
3107 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
3108 {
3109         GdkCursor *cursor = NULL;
3110         GdkDisplay *display;
3111         GtkWidget *widget;
3112
3113         if (view->cursor == new_cursor) {
3114                 return;
3115         }
3116
3117         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
3118         display = gtk_widget_get_display (widget);
3119         view->cursor = new_cursor;
3120
3121         switch (new_cursor) {
3122                 case EV_VIEW_CURSOR_NORMAL:
3123                         gdk_window_set_cursor (widget->window, NULL);
3124                         break;
3125                 case EV_VIEW_CURSOR_IBEAM:
3126                         cursor = gdk_cursor_new_for_display (display, GDK_XTERM);
3127                         break;
3128                 case EV_VIEW_CURSOR_LINK:
3129                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
3130                         break;
3131                 case EV_VIEW_CURSOR_WAIT:
3132                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
3133                         break;
3134                 case EV_VIEW_CURSOR_HIDDEN:
3135                         cursor = ev_view_create_invisible_cursor ();
3136                         break;
3137                 case EV_VIEW_CURSOR_DRAG:
3138                         cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
3139                         break;
3140         }
3141
3142         if (cursor) {
3143                 gdk_window_set_cursor (widget->window, cursor);
3144                 gdk_cursor_unref (cursor);
3145                 gdk_flush();
3146         }
3147 }
3148
3149 void
3150 ev_view_hide_cursor (EvView *view)
3151 {
3152        ev_view_set_cursor (view, EV_VIEW_CURSOR_HIDDEN);
3153 }
3154
3155 void
3156 ev_view_show_cursor (EvView *view)
3157 {
3158        ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
3159 }
3160
3161 /*** Enum description for usage in signal ***/
3162
3163 GType
3164 ev_sizing_mode_get_type (void)
3165 {
3166   static GType etype = 0;
3167   if (etype == 0) {
3168     static const GEnumValue values[] = {
3169       { EV_SIZING_FIT_WIDTH, "EV_SIZING_FIT_WIDTH", "fit-width" },
3170       { EV_SIZING_BEST_FIT, "EV_SIZING_BEST_FIT", "best-fit" },
3171       { EV_SIZING_FREE, "EV_SIZING_FREE", "free" },
3172       { 0, NULL, NULL }
3173     };
3174     etype = g_enum_register_static ("EvSizingMode", values);
3175   }
3176   return etype;
3177 }
3178