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