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 <gtk/gtkalignment.h>
  22 #include <glib/gi18n.h>
  23 #include <gtk/gtkbindings.h>
  24 #include <gtk/gtkselection.h>
  25 #include <gtk/gtkclipboard.h>
  26 #include <gdk/gdkkeysyms.h>
  27 #include <libgnomevfs/gnome-vfs-utils.h>
  28
  29 #include "ev-marshal.h"
  30 #include "ev-view.h"
  31 #include "ev-document-find.h"
  32
  33 #define EV_VIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), EV_TYPE_VIEW, EvViewClass))
  34 #define EV_IS_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), EV_TYPE_VIEW))
  35 #define EV_VIEW_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), EV_TYPE_VIEW, EvViewClass))
  36
  37 enum {
  38         PROP_0,
  39         PROP_STATUS,
  40         PROP_FIND_STATUS
  41 };
  42
  43 enum {
  44   TARGET_STRING,
  45   TARGET_TEXT,
  46   TARGET_COMPOUND_TEXT,
  47   TARGET_UTF8_STRING,
  48   TARGET_TEXT_BUFFER_CONTENTS
  49 };
  50
  51 static const GtkTargetEntry targets[] = {
  52         { "STRING", 0, TARGET_STRING },
  53         { "TEXT",   0, TARGET_TEXT },
  54         { "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
  55         { "UTF8_STRING", 0, TARGET_UTF8_STRING },
  56 };
  57
  58 typedef enum {
  59         EV_VIEW_CURSOR_NORMAL,
  60         EV_VIEW_CURSOR_LINK,
  61         EV_VIEW_CURSOR_WAIT
  62 } EvViewCursor;
  63
  64 struct _EvView {
  65         GtkWidget parent_instance;
  66
  67         EvDocument *document;
  68
  69         GdkWindow *bin_window;
  70
  71         char *status;
  72         char *find_status;
  73
  74         int scroll_x;
  75         int scroll_y;
  76
  77         gboolean pressed_button;
  78         gboolean has_selection;
  79         GdkPoint selection_start;
  80         GdkRectangle selection;
  81         EvViewCursor cursor;
  82
  83         GtkAdjustment *hadjustment;
  84         GtkAdjustment *vadjustment;
  85
  86         int results_on_this_page;
  87         int next_page_with_result;
  88         double find_percent_complete;
  89
  90         double scale;
  91 };
  92
  93 struct _EvViewClass {
  94         GtkWidgetClass parent_class;
  95
  96         void    (*set_scroll_adjustments) (EvView         *view,
  97                                            GtkAdjustment  *hadjustment,
  98                                            GtkAdjustment  *vadjustment);
  99         void    (*scroll_view)            (EvView         *view,
 100                                            GtkScrollType   scroll,
 101                                            gboolean        horizontal);
 102
 103         /* Should this be notify::page? */
 104         void    (*page_changed)           (EvView         *view);
 105 };
 106
 107 static guint page_changed_signal = 0;
 108
 109 static void ev_view_set_scroll_adjustments (EvView         *view,
 110                                             GtkAdjustment  *hadjustment,
 111                                             GtkAdjustment  *vadjustment);
 112
 113 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 114
 115 /*** Helper functions ***/
 116
 117 static void
 118 view_update_adjustments (EvView *view)
 119 {
 120         int old_x = view->scroll_x;
 121         int old_y = view->scroll_y;
 122
 123         if (view->hadjustment)
 124                 view->scroll_x = view->hadjustment->value;
 125         else
 126                 view->scroll_x = 0;
 127
 128         if (view->vadjustment)
 129                 view->scroll_y = view->vadjustment->value;
 130         else
 131                 view->scroll_y = 0;
 132
 133         if (GTK_WIDGET_REALIZED (view) &&
 134             (view->scroll_x != old_x || view->scroll_y != old_y)) {
 135                 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
 136                 gdk_window_process_updates (view->bin_window, TRUE);
 137         }
 138 }
 139
 140 static void
 141 view_set_adjustment_values (EvView         *view,
 142                             GtkOrientation  orientation)
 143 {
 144         GtkWidget *widget = GTK_WIDGET (view);
 145         GtkAdjustment *adjustment;
 146         gboolean value_changed = FALSE;
 147         int requisition;
 148         int allocation;
 149
 150         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 151                 requisition = widget->requisition.width;
 152                 allocation = widget->allocation.width;
 153                 adjustment = view->hadjustment;
 154         } else {
 155                 requisition = widget->requisition.height;
 156                 allocation = widget->allocation.height;
 157                 adjustment = view->vadjustment;
 158         }
 159
 160         if (!adjustment)
 161                 return;
 162
 163         adjustment->page_size = allocation;
 164         adjustment->step_increment = allocation * 0.1;
 165         adjustment->page_increment = allocation * 0.9;
 166         adjustment->lower = 0;
 167         adjustment->upper = MAX (allocation, requisition);
 168
 169         if (adjustment->value > adjustment->upper - adjustment->page_size) {
 170                 adjustment->value = adjustment->upper - adjustment->page_size;
 171                 value_changed = TRUE;
 172         }
 173
 174         gtk_adjustment_changed (adjustment);
 175         if (value_changed)
 176                 gtk_adjustment_value_changed (adjustment);
 177 }
 178
 179 /*** Virtual function implementations ***/
 180
 181 static void
 182 ev_view_finalize (GObject *object)
 183 {
 184         EvView *view = EV_VIEW (object);
 185
 186         if (view->document)
 187                 g_object_unref (view->document);
 188
 189         ev_view_set_scroll_adjustments (view, NULL, NULL);
 190
 191         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 192 }
 193
 194 static void
 195 ev_view_destroy (GtkObject *object)
 196 {
 197         EvView *view = EV_VIEW (object);
 198
 199         ev_view_set_scroll_adjustments (view, NULL, NULL);
 200
 201         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
 202 }
 203
 204 static void
 205 ev_view_size_request (GtkWidget      *widget,
 206                       GtkRequisition *requisition)
 207 {
 208         EvView *view = EV_VIEW (widget);
 209
 210         if (GTK_WIDGET_REALIZED (widget)) {
 211                 if (view->document) {
 212                         ev_document_get_page_size (view->document,
 213                                                    &requisition->width,
 214                                                    &requisition->height);
 215                 } else {
 216                         requisition->width = 10;
 217                         requisition->height = 10;
 218                 }
 219
 220                 requisition->width += 2;
 221                 requisition->height += 2;
 222         }
 223
 224 }
 225
 226 static void
 227 ev_view_size_allocate (GtkWidget      *widget,
 228                        GtkAllocation  *allocation)
 229 {
 230         EvView *view = EV_VIEW (widget);
 231
 232         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
 233
 234         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
 235         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
 236
 237         if (GTK_WIDGET_REALIZED (widget)) {
 238                 gdk_window_resize (view->bin_window,
 239                                    MAX (widget->allocation.width, widget->requisition.width),
 240                                    MAX (widget->allocation.height, widget->requisition.height));
 241         }
 242 }
 243
 244 static void
 245 ev_view_realize (GtkWidget *widget)
 246 {
 247         EvView *view = EV_VIEW (widget);
 248         GdkWindowAttr attributes;
 249
 250         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 251
 252         attributes.window_type = GDK_WINDOW_CHILD;
 253         attributes.wclass = GDK_INPUT_OUTPUT;
 254         attributes.visual = gtk_widget_get_visual (widget);
 255         attributes.colormap = gtk_widget_get_colormap (widget);
 256
 257         attributes.x = widget->allocation.x;
 258         attributes.y = widget->allocation.y;
 259         attributes.width = widget->allocation.width;
 260         attributes.height = widget->allocation.height;
 261         attributes.event_mask = 0;
 262
 263         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 264                                          &attributes,
 265                                          GDK_WA_X | GDK_WA_Y |
 266                                          GDK_WA_COLORMAP |
 267                                          GDK_WA_VISUAL);
 268         gdk_window_set_user_data (widget->window, widget);
 269         widget->style = gtk_style_attach (widget->style, widget->window);
 270
 271         attributes.x = 0;
 272         attributes.y = 0;
 273         attributes.width = MAX (widget->allocation.width, widget->requisition.width);
 274         attributes.height = MAX (widget->allocation.height, widget->requisition.height);
 275         attributes.event_mask = GDK_EXPOSURE_MASK |
 276                                 GDK_BUTTON_PRESS_MASK |
 277                                 GDK_BUTTON_RELEASE_MASK |
 278                                 GDK_SCROLL_MASK |
 279                                 GDK_KEY_PRESS_MASK |
 280                                 GDK_POINTER_MOTION_MASK;
 281
 282         view->bin_window = gdk_window_new (widget->window,
 283                                            &attributes,
 284                                            GDK_WA_X | GDK_WA_Y |
 285                                            GDK_WA_COLORMAP |
 286                                            GDK_WA_VISUAL);
 287         gdk_window_set_user_data (view->bin_window, widget);
 288         gdk_window_show (view->bin_window);
 289
 290         widget->style = gtk_style_attach (widget->style, view->bin_window);
 291         gdk_window_set_background (view->bin_window, &widget->style->mid[widget->state]);
 292
 293         if (view->document) {
 294                 ev_document_set_target (view->document, view->bin_window);
 295
 296                 /* We can't get page size without a target, so we have to
 297                  * queue a size request at realization. Could be fixed
 298                  * with EvDocument changes to allow setting a GdkScreen
 299                  * without setting a target.
 300                  */
 301                 gtk_widget_queue_resize (widget);
 302         }
 303 }
 304
 305 static void
 306 ev_view_unrealize (GtkWidget *widget)
 307 {
 308         EvView *view = EV_VIEW (widget);
 309
 310         if (view->document)
 311                 ev_document_set_target (view->document, NULL);
 312
 313         gdk_window_set_user_data (view->bin_window, NULL);
 314         gdk_window_destroy (view->bin_window);
 315         view->bin_window = NULL;
 316
 317         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
 318 }
 319
 320 static guint32
 321 ev_gdk_color_to_rgb (const GdkColor *color)
 322 {
 323   guint32 result;
 324   result = (0xff0000 | (color->red & 0xff00));
 325   result <<= 8;
 326   result |= ((color->green & 0xff00) | (color->blue >> 8));
 327   return result;
 328 }
 329
 330 static void
 331 draw_rubberband (GtkWidget *widget, GdkWindow *window, const GdkRectangle *rect)
 332 {
 333         GdkGC *gc;
 334         GdkPixbuf *pixbuf;
 335         GdkColor *fill_color_gdk;
 336         guint fill_color;
 337
 338         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
 339         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | 0x40;
 340
 341         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 342                                  rect->width, rect->height);
 343         gdk_pixbuf_fill (pixbuf, fill_color);
 344
 345         gdk_draw_pixbuf (window, NULL, pixbuf,
 346                          0, 0,
 347                          rect->x,rect->y,
 348                          rect->width, rect->height,
 349                          GDK_RGB_DITHER_NONE,
 350                          0, 0);
 351
 352         g_object_unref (pixbuf);
 353
 354         gc = gdk_gc_new (window);
 355         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
 356         gdk_draw_rectangle (window, gc, FALSE,
 357                             rect->x, rect->y,
 358                             rect->width - 1,
 359                             rect->height - 1);
 360         g_object_unref (gc);
 361
 362         gdk_color_free (fill_color_gdk);
 363 }
 364
 365 static void
 366 highlight_find_results (EvView *view)
 367 {
 368         EvDocumentFind *find = EV_DOCUMENT_FIND (view->document);
 369         int i, results;
 370
 371         results = ev_document_find_get_n_results (find);
 372
 373         for (i = 0; i < results; i++) {
 374                 GdkRectangle rectangle;
 375
 376                 ev_document_find_get_result (find, i, &rectangle);
 377                 draw_rubberband (GTK_WIDGET (view),
 378                                  view->bin_window, &rectangle);
 379         }
 380 }
 381
 382 static void
 383 expose_bin_window (GtkWidget      *widget,
 384                    GdkEventExpose *event)
 385 {
 386         EvView *view = EV_VIEW (widget);
 387         int x_offset, y_offset;
 388
 389         if (view->document == NULL)
 390                 return;
 391
 392         x_offset = MAX (0, (widget->allocation.width -
 393                             widget->requisition.width) / 2);
 394         y_offset = MAX (0, (widget->allocation.height -
 395                             widget->requisition.height) / 2);
 396         gdk_draw_rectangle (view->bin_window,
 397                             widget->style->black_gc,
 398                             FALSE,
 399                             x_offset,
 400                             y_offset,
 401                             widget->requisition.width - 1,
 402                             widget->requisition.height - 1);
 403
 404         ev_document_set_page_offset (view->document,
 405                                      x_offset + 1,
 406                                      y_offset + 1);
 407
 408         ev_document_render (view->document,
 409                             event->area.x, event->area.y,
 410                             event->area.width, event->area.height);
 411
 412         highlight_find_results (view);
 413
 414         if (view->has_selection) {
 415                 draw_rubberband (widget, view->bin_window, &view->selection);
 416         }
 417 }
 418
 419 static gboolean
 420 ev_view_expose_event (GtkWidget      *widget,
 421                       GdkEventExpose *event)
 422 {
 423         EvView *view = EV_VIEW (widget);
 424
 425         if (event->window == view->bin_window)
 426                 expose_bin_window (widget, event);
 427         else
 428                 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 429
 430         return FALSE;
 431 }
 432
 433 void
 434 ev_view_select_all (EvView *ev_view)
 435 {
 436         GtkWidget *widget = GTK_WIDGET (ev_view);
 437
 438         g_return_if_fail (EV_IS_VIEW (ev_view));
 439
 440         ev_view->has_selection = TRUE;
 441         ev_view->selection.x = ev_view->selection.y = 0;
 442         ev_view->selection.width = widget->requisition.width;
 443         ev_view->selection.height = widget->requisition.height;
 444
 445         gtk_widget_queue_draw (widget);
 446 }
 447
 448 void
 449 ev_view_copy (EvView *ev_view)
 450 {
 451         GtkClipboard *clipboard;
 452         char *text;
 453
 454         text = ev_document_get_text (ev_view->document, &ev_view->selection);
 455         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 456                                               GDK_SELECTION_CLIPBOARD);
 457         gtk_clipboard_set_text (clipboard, text, -1);
 458         g_free (text);
 459 }
 460
 461 static void
 462 ev_view_primary_get_cb (GtkClipboard     *clipboard,
 463                         GtkSelectionData *selection_data,
 464                         guint             info,
 465                         gpointer          data)
 466 {
 467         EvView *ev_view = EV_VIEW (data);
 468         char *text;
 469
 470         text = ev_document_get_text (ev_view->document, &ev_view->selection);
 471         gtk_selection_data_set_text (selection_data, text, -1);
 472 }
 473
 474 static void
 475 ev_view_primary_clear_cb (GtkClipboard *clipboard,
 476                           gpointer      data)
 477 {
 478         EvView *ev_view = EV_VIEW (data);
 479
 480         ev_view->has_selection = FALSE;
 481 }
 482
 483 static void
 484 ev_view_update_primary_selection (EvView *ev_view)
 485 {
 486         GtkClipboard *clipboard;
 487
 488         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 489                                               GDK_SELECTION_PRIMARY);
 490
 491         if (ev_view->has_selection) {
 492                 if (!gtk_clipboard_set_with_owner (clipboard,
 493                                                    targets,
 494                                                    G_N_ELEMENTS (targets),
 495                                                    ev_view_primary_get_cb,
 496                                                    ev_view_primary_clear_cb,
 497                                                    G_OBJECT (ev_view)))
 498                         ev_view_primary_clear_cb (clipboard, ev_view);
 499         } else {
 500                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
 501                         gtk_clipboard_clear (clipboard);
 502         }
 503 }
 504
 505 static gboolean
 506 ev_view_button_press_event (GtkWidget      *widget,
 507                             GdkEventButton *event)
 508 {
 509         EvView *view = EV_VIEW (widget);
 510
 511         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
 512                 gtk_widget_grab_focus (widget);
 513         }
 514
 515         view->pressed_button = event->button;
 516
 517         switch (event->button) {
 518                 case 1:
 519                         if (view->has_selection) {
 520                                 view->has_selection = FALSE;
 521                                 gtk_widget_queue_draw (widget);
 522                         }
 523
 524                         view->selection_start.x = event->x;
 525                         view->selection_start.y = event->y;
 526                         break;
 527         }
 528
 529         return TRUE;
 530 }
 531
 532 static char *
 533 status_message_from_link (EvLink *link)
 534 {
 535         EvLinkType type;
 536         char *msg;
 537         int page;
 538
 539         type = ev_link_get_link_type (link);
 540
 541         switch (type) {
 542                 case EV_LINK_TYPE_TITLE:
 543                         msg = g_strdup (ev_link_get_title (link));
 544                         break;
 545                 case EV_LINK_TYPE_PAGE:
 546                         page = ev_link_get_page (link);
 547                         msg = g_strdup_printf (_("Go to page %d"), page);
 548                         break;
 549                 case EV_LINK_TYPE_EXTERNAL_URI:
 550                         msg = g_strdup (ev_link_get_uri (link));
 551                         break;
 552                 default:
 553                         msg = NULL;
 554         }
 555
 556         return msg;
 557 }
 558
 559 static void
 560 ev_view_set_status (EvView *view, const char *message)
 561 {
 562         g_return_if_fail (EV_IS_VIEW (view));
 563
 564         if (message != view->status) {
 565                 g_free (view->status);
 566                 view->status = g_strdup (message);
 567                 g_object_notify (G_OBJECT (view), "status");
 568         }
 569 }
 570
 571 static void
 572 ev_view_set_find_status (EvView *view, const char *message)
 573 {
 574         g_return_if_fail (EV_IS_VIEW (view));
 575
 576         g_free (view->find_status);
 577         view->find_status = g_strdup (message);
 578         g_object_notify (G_OBJECT (view), "find-status");
 579 }
 580
 581
 582 static void
 583 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
 584 {
 585         GdkCursor *cursor = NULL;
 586         GdkDisplay *display;
 587         GtkWidget *widget;
 588
 589         if (view->cursor == new_cursor) {
 590                 return;
 591         }
 592
 593         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
 594         display = gtk_widget_get_display (widget);
 595         view->cursor = new_cursor;
 596
 597         switch (new_cursor) {
 598                 case EV_VIEW_CURSOR_NORMAL:
 599                         gdk_window_set_cursor (widget->window, NULL);
 600                         break;
 601                 case EV_VIEW_CURSOR_LINK:
 602                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
 603                         break;
 604                 case EV_VIEW_CURSOR_WAIT:
 605                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
 606                         break;
 607         }
 608
 609         if (cursor) {
 610                 gdk_window_set_cursor (widget->window, cursor);
 611                 gdk_cursor_unref (cursor);
 612                 gdk_flush();
 613         }
 614 }
 615
 616 static gboolean
 617 ev_view_motion_notify_event (GtkWidget      *widget,
 618                              GdkEventMotion *event)
 619 {
 620         EvView *view = EV_VIEW (widget);
 621
 622         if (view->pressed_button > 0) {
 623                 view->has_selection = TRUE;
 624                 view->selection.x = MIN (view->selection_start.x, event->x);
 625                 view->selection.y = MIN (view->selection_start.y, event->y);
 626                 view->selection.width = ABS (view->selection_start.x - event->x) + 1;
 627                 view->selection.height = ABS (view->selection_start.y - event->y) + 1;
 628         } else if (view->document) {
 629                 EvLink *link;
 630
 631                 link = ev_document_get_link (view->document, event->x, event->y);
 632                 if (link) {
 633                         char *msg;
 634
 635                         msg = status_message_from_link (link);
 636                         ev_view_set_status (view, msg);
 637                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
 638                         g_free (msg);
 639
 640                         g_object_unref (link);
 641                 } else {
 642                         ev_view_set_status (view, NULL);
 643                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
 644                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
 645                         }
 646                 }
 647         }
 648
 649         gtk_widget_queue_draw (widget);
 650
 651         return TRUE;
 652 }
 653
 654 static gboolean
 655 ev_view_button_release_event (GtkWidget      *widget,
 656                               GdkEventButton *event)
 657 {
 658         EvView *view = EV_VIEW (widget);
 659
 660         view->pressed_button = -1;
 661
 662         if (view->has_selection) {
 663                 ev_view_update_primary_selection (view);
 664         } else if (view->document) {
 665                 EvLink *link;
 666
 667                 link = ev_document_get_link (view->document,
 668                                              event->x,
 669                                              event->y);
 670                 if (link) {
 671                         ev_view_go_to_link (view, link);
 672                         g_object_unref (link);
 673                 }
 674         }
 675
 676         return FALSE;
 677 }
 678
 679 static void
 680 on_adjustment_value_changed (GtkAdjustment  *adjustment,
 681                              EvView *view)
 682 {
 683         view_update_adjustments (view);
 684 }
 685
 686 static void
 687 set_scroll_adjustment (EvView *view,
 688                        GtkOrientation  orientation,
 689                        GtkAdjustment  *adjustment)
 690 {
 691         GtkAdjustment **to_set;
 692
 693         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 694                 to_set = &view->hadjustment;
 695         else
 696                 to_set = &view->vadjustment;
 697
 698         if (*to_set != adjustment) {
 699                 if (*to_set) {
 700                         g_signal_handlers_disconnect_by_func (*to_set,
 701                                                               (gpointer) on_adjustment_value_changed,
 702                                                               view);
 703                         g_object_unref (*to_set);
 704                 }
 705
 706                 *to_set = adjustment;
 707                 view_set_adjustment_values (view, orientation);
 708
 709                 if (*to_set) {
 710                         g_object_ref (*to_set);
 711                         g_signal_connect (*to_set, "value_changed",
 712                                           G_CALLBACK (on_adjustment_value_changed), view);
 713                 }
 714         }
 715 }
 716
 717 static void
 718 ev_view_set_scroll_adjustments (EvView *view,
 719                                 GtkAdjustment  *hadjustment,
 720                                 GtkAdjustment  *vadjustment)
 721 {
 722         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 723         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 724
 725         view_update_adjustments (view);
 726 }
 727
 728 static void
 729 add_scroll_binding (GtkBindingSet  *binding_set,
 730                     guint           keyval,
 731                     GtkScrollType   scroll,
 732                     gboolean        horizontal)
 733 {
 734   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 735
 736   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 737                                 "scroll_view", 2,
 738                                 GTK_TYPE_SCROLL_TYPE, scroll,
 739                                 G_TYPE_BOOLEAN, horizontal);
 740   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 741                                 "scroll_view", 2,
 742                                 GTK_TYPE_SCROLL_TYPE, scroll,
 743                                 G_TYPE_BOOLEAN, horizontal);
 744 }
 745
 746 static void
 747 ev_view_scroll_view (EvView *view,
 748                      GtkScrollType scroll,
 749                      gboolean horizontal)
 750 {
 751         if (scroll == GTK_SCROLL_PAGE_BACKWARD) {
 752                 ev_view_set_page (view, ev_view_get_page (view) - 1);
 753         } else if (scroll == GTK_SCROLL_PAGE_FORWARD) {
 754                 ev_view_set_page (view, ev_view_get_page (view) + 1);
 755         } else {
 756                 GtkAdjustment *adjustment;
 757                 double value;
 758
 759                 if (horizontal) {
 760                         adjustment = view->hadjustment;
 761                 } else {
 762                         adjustment = view->vadjustment;
 763                 }
 764
 765                 value = adjustment->value;
 766
 767                 switch (scroll) {
 768                         case GTK_SCROLL_STEP_BACKWARD:
 769                                 value -= adjustment->step_increment;
 770                                 break;
 771                         case GTK_SCROLL_STEP_FORWARD:
 772                                 value += adjustment->step_increment;
 773                                 break;
 774                         default:
 775                                 break;
 776                 }
 777
 778                 value = CLAMP (value, adjustment->lower,
 779                                adjustment->upper - adjustment->page_size);
 780
 781                 gtk_adjustment_set_value (adjustment, value);
 782         }
 783 }
 784
 785 static void
 786 ev_view_set_property (GObject *object,
 787                       guint prop_id,
 788                       const GValue *value,
 789                       GParamSpec *pspec)
 790 {
 791         switch (prop_id)
 792         {
 793                 /* Read only */
 794                 case PROP_STATUS:
 795                 case PROP_FIND_STATUS:
 796                         break;
 797         }
 798 }
 799
 800 static void
 801 ev_view_get_property (GObject *object,
 802                       guint prop_id,
 803                       GValue *value,
 804                       GParamSpec *pspec)
 805 {
 806         EvView *view = EV_VIEW (object);
 807
 808         switch (prop_id)
 809         {
 810                 case PROP_STATUS:
 811                         g_value_set_string (value, view->status);
 812                         break;
 813                 case PROP_FIND_STATUS:
 814                         g_value_set_string (value, view->status);
 815                         break;
 816         }
 817 }
 818
 819 static void
 820 ev_view_class_init (EvViewClass *class)
 821 {
 822         GObjectClass *object_class = G_OBJECT_CLASS (class);
 823         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
 824         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 825         GtkBindingSet *binding_set;
 826
 827         object_class->finalize = ev_view_finalize;
 828         object_class->set_property = ev_view_set_property;
 829         object_class->get_property = ev_view_get_property;
 830
 831         widget_class->expose_event = ev_view_expose_event;
 832         widget_class->button_press_event = ev_view_button_press_event;
 833         widget_class->motion_notify_event = ev_view_motion_notify_event;
 834         widget_class->button_release_event = ev_view_button_release_event;
 835         widget_class->size_request = ev_view_size_request;
 836         widget_class->size_allocate = ev_view_size_allocate;
 837         widget_class->realize = ev_view_realize;
 838         widget_class->unrealize = ev_view_unrealize;
 839         gtk_object_class->destroy = ev_view_destroy;
 840
 841         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
 842         class->scroll_view = ev_view_scroll_view;
 843
 844         widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
 845                                                                      G_OBJECT_CLASS_TYPE (object_class),
 846                                                                      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 847                                                                      G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
 848                                                                      NULL, NULL,
 849                                                                      ev_marshal_VOID__OBJECT_OBJECT,
 850                                                                      G_TYPE_NONE, 2,
 851                                                                      GTK_TYPE_ADJUSTMENT,
 852                                                                      GTK_TYPE_ADJUSTMENT);
 853         page_changed_signal = g_signal_new ("page-changed",
 854                                             G_OBJECT_CLASS_TYPE (object_class),
 855                                             G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 856                                             G_STRUCT_OFFSET (EvViewClass, page_changed),
 857                                             NULL, NULL,
 858                                             ev_marshal_VOID__NONE,
 859                                             G_TYPE_NONE, 0);
 860
 861         g_signal_new ("scroll_view",
 862                       G_TYPE_FROM_CLASS (object_class),
 863                       G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 864                       G_STRUCT_OFFSET (EvViewClass, scroll_view),
 865                       NULL, NULL,
 866                       ev_marshal_VOID__ENUM_BOOLEAN,
 867                       G_TYPE_NONE, 2,
 868                       GTK_TYPE_SCROLL_TYPE,
 869                       G_TYPE_BOOLEAN);
 870
 871         g_object_class_install_property (object_class,
 872                                          PROP_STATUS,
 873                                          g_param_spec_string ("status",
 874                                                               "Status Message",
 875                                                               "The status message",
 876                                                               NULL,
 877                                                               G_PARAM_READABLE));
 878
 879         g_object_class_install_property (object_class,
 880                                          PROP_STATUS,
 881                                          g_param_spec_string ("find-status",
 882                                                               "Find Status Message",
 883                                                               "The find status message",
 884                                                               NULL,
 885                                                               G_PARAM_READABLE));
 886
 887         binding_set = gtk_binding_set_by_class (class);
 888
 889         add_scroll_binding (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
 890         add_scroll_binding (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
 891         add_scroll_binding (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
 892         add_scroll_binding (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
 893
 894         add_scroll_binding (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
 895         add_scroll_binding (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);
 896 }
 897
 898 static void
 899 ev_view_init (EvView *view)
 900 {
 901         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
 902
 903         view->scale = 1.0;
 904         view->pressed_button = -1;
 905         view->cursor = EV_VIEW_CURSOR_NORMAL;
 906         view->results_on_this_page = 0;
 907         view->next_page_with_result = 0;
 908 }
 909
 910 static char *
 911 ev_view_get_find_status_message (EvView *view)
 912 {
 913 /*
 914         if (view->find_results->len == 0) {
 915                 if (view->find_percent_complete >= (1.0 - 1e-10)) {
 916                         return g_strdup (_("Not found"));
 917                 } else {
 918                         return g_strdup_printf (_("%3d%% remaining to search"),
 919                                                 (int) ((1.0 - view->find_percent_complete) * 100));
 920                 }
 921         } else if (view->results_on_this_page == 0) {
 922                 g_assert (view->next_page_with_result != 0);
 923                 return g_strdup_printf (_("Found on page %d"),
 924                                         view->next_page_with_result);
 925         } else {
 926                 return g_strdup_printf (_("%d found on this page"),
 927                                         view->results_on_this_page);
 928         }
 929 */
 930 }
 931
 932 static void
 933 find_changed_cb (EvDocument *document, EvView *view)
 934 {
 935         gtk_widget_queue_draw (GTK_WIDGET (view));
 936 }
 937
 938 static void
 939 document_changed_callback (EvDocument *document,
 940                            EvView     *view)
 941 {
 942         gtk_widget_queue_draw (GTK_WIDGET (view));
 943         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
 944 }
 945
 946 /*** Public API ***/
 947
 948 GtkWidget*
 949 ev_view_new (void)
 950 {
 951         return g_object_new (EV_TYPE_VIEW, NULL);
 952 }
 953
 954 void
 955 ev_view_set_document (EvView     *view,
 956                       EvDocument *document)
 957 {
 958         g_return_if_fail (EV_IS_VIEW (view));
 959
 960         if (document != view->document) {
 961                 if (view->document) {
 962                         g_signal_handlers_disconnect_by_func (view->document,
 963                                                               find_changed_cb,
 964                                                               view);
 965                         g_object_unref (view->document);
 966                 }
 967
 968                 view->document = document;
 969
 970                 if (view->document) {
 971                         g_object_ref (view->document);
 972                         if (EV_IS_DOCUMENT_FIND (view->document))
 973                                 g_signal_connect (view->document,
 974                                                   "find_changed",
 975                                                   G_CALLBACK (find_changed_cb),
 976                                                   view);
 977                         g_signal_connect (view->document,
 978                                           "changed",
 979                                           G_CALLBACK (document_changed_callback),
 980                                           view);
 981                 }
 982
 983                 if (GTK_WIDGET_REALIZED (view))
 984                         ev_document_set_target (view->document, view->bin_window);
 985
 986                 gtk_widget_queue_resize (GTK_WIDGET (view));
 987
 988                 g_signal_emit (view, page_changed_signal, 0);
 989         }
 990 }
 991
 992 static void
 993 set_document_page (EvView *view, int page)
 994 {
 995         if (view->document) {
 996                 int old_page = ev_document_get_page (view->document);
 997                 int old_width, old_height;
 998
 999                 ev_document_get_page_size (view->document,
1000                                            &old_width, &old_height);
1001
1002                 if (old_page != page) {
1003                         ev_view_set_cursor (view, EV_VIEW_CURSOR_WAIT);
1004                         ev_document_set_page (view->document, page);
1005                 }
1006
1007                 if (old_page != ev_document_get_page (view->document)) {
1008                         int width, height;
1009
1010                         g_signal_emit (view, page_changed_signal, 0);
1011
1012                         view->has_selection = FALSE;
1013                         ev_document_get_page_size (view->document,
1014                                                    &width, &height);
1015                         if (width != old_width || height != old_height)
1016                                 gtk_widget_queue_resize (GTK_WIDGET (view));
1017                 }
1018         }
1019 }
1020
1021 static void
1022 go_to_link (EvView *view, EvLink *link)
1023 {
1024         EvLinkType type;
1025         const char *uri;
1026         int page;
1027
1028         type = ev_link_get_link_type (link);
1029
1030         switch (type) {
1031                 case EV_LINK_TYPE_TITLE:
1032                         break;
1033                 case EV_LINK_TYPE_PAGE:
1034                         page = ev_link_get_page (link);
1035                         set_document_page (view, page);
1036                         break;
1037                 case EV_LINK_TYPE_EXTERNAL_URI:
1038                         uri = ev_link_get_uri (link);
1039                         gnome_vfs_url_show (uri);
1040                         break;
1041         }
1042 }
1043
1044 void
1045 ev_view_go_to_link (EvView *view, EvLink *link)
1046 {
1047         go_to_link (view, link);
1048 }
1049
1050 void
1051 ev_view_set_page (EvView *view,
1052                   int     page)
1053 {
1054         g_return_if_fail (EV_IS_VIEW (view));
1055
1056         set_document_page (view, page);
1057 }
1058
1059 int
1060 ev_view_get_page (EvView *view)
1061 {
1062         if (view->document)
1063                 return ev_document_get_page (view->document);
1064         else
1065                 return 1;
1066 }
1067
1068 #define ZOOM_IN_FACTOR  1.2
1069 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
1070
1071 #define MIN_SCALE 0.05409
1072 #define MAX_SCALE 18.4884
1073
1074 static void
1075 ev_view_zoom (EvView   *view,
1076               double    factor,
1077               gboolean  relative)
1078 {
1079         double scale;
1080
1081         if (relative)
1082                 scale = view->scale * factor;
1083         else
1084                 scale = factor;
1085
1086         view->scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1087
1088         ev_document_set_scale (view->document, view->scale);
1089
1090         gtk_widget_queue_resize (GTK_WIDGET (view));
1091 }
1092
1093 void
1094 ev_view_zoom_in (EvView *view)
1095 {
1096         ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
1097 }
1098
1099 void
1100 ev_view_zoom_out (EvView *view)
1101 {
1102         ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
1103 }
1104
1105 void
1106 ev_view_normal_size (EvView *view)
1107 {
1108         ev_view_zoom (view, 1.0, FALSE);
1109 }
1110
1111 void
1112 ev_view_best_fit (EvView *view)
1113 {
1114         double scale;
1115         int width, height;
1116
1117         width = height = 0;
1118         ev_document_get_page_size (view->document, &width, &height);
1119
1120         scale = 1.0;
1121         if (width != 0 && height != 0) {
1122                 double scale_w, scale_h;
1123
1124                 scale_w = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
1125                 scale_h = (double)GTK_WIDGET (view)->allocation.height * view->scale / height;
1126
1127                 scale = (scale_w < scale_h) ? scale_w : scale_h;
1128         }
1129
1130         ev_view_zoom (view, scale, FALSE);
1131 }
1132
1133 void
1134 ev_view_fit_width (EvView *view)
1135 {
1136         double scale = 1.0;
1137         int width;
1138
1139         width = 0;
1140         ev_document_get_page_size (view->document, &width, NULL);
1141
1142         scale = 1.0;
1143         if (width != 0)
1144                 scale = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
1145
1146         ev_view_zoom (view, scale, FALSE);
1147 }
1148
1149 const char *
1150 ev_view_get_status (EvView *view)
1151 {
1152         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1153
1154         return view->status;
1155 }
1156
1157 const char *
1158 ev_view_get_find_status (EvView *view)
1159 {
1160         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1161
1162         return view->find_status;
1163 }
1164
1165