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         GArray *find_results;
  87         int results_on_this_page;
  88         int next_page_with_result;
  89         double find_percent_complete;
  90
  91         double scale;
  92 };
  93
  94 struct _EvViewClass {
  95         GtkWidgetClass parent_class;
  96
  97         void    (*set_scroll_adjustments) (EvView         *view,
  98                                            GtkAdjustment  *hadjustment,
  99                                            GtkAdjustment  *vadjustment);
 100         void    (*scroll_view)            (EvView         *view,
 101                                            GtkScrollType   scroll,
 102                                            gboolean        horizontal);
 103
 104         /* Should this be notify::page? */
 105         void    (*page_changed)           (EvView         *view);
 106 };
 107
 108 static guint page_changed_signal = 0;
 109
 110 static void ev_view_set_scroll_adjustments (EvView         *view,
 111                                             GtkAdjustment  *hadjustment,
 112                                             GtkAdjustment  *vadjustment);
 113
 114 G_DEFINE_TYPE (EvView, ev_view, GTK_TYPE_WIDGET)
 115
 116 /*** Helper functions ***/
 117
 118 static void
 119 view_update_adjustments (EvView *view)
 120 {
 121         int old_x = view->scroll_x;
 122         int old_y = view->scroll_y;
 123
 124         if (view->hadjustment)
 125                 view->scroll_x = view->hadjustment->value;
 126         else
 127                 view->scroll_x = 0;
 128
 129         if (view->vadjustment)
 130                 view->scroll_y = view->vadjustment->value;
 131         else
 132                 view->scroll_y = 0;
 133
 134         if (GTK_WIDGET_REALIZED (view) &&
 135             (view->scroll_x != old_x || view->scroll_y != old_y)) {
 136                 gdk_window_move (view->bin_window, - view->scroll_x, - view->scroll_y);
 137                 gdk_window_process_updates (view->bin_window, TRUE);
 138         }
 139 }
 140
 141 static void
 142 view_set_adjustment_values (EvView         *view,
 143                             GtkOrientation  orientation)
 144 {
 145         GtkWidget *widget = GTK_WIDGET (view);
 146         GtkAdjustment *adjustment;
 147         gboolean value_changed = FALSE;
 148         int requisition;
 149         int allocation;
 150
 151         if (orientation == GTK_ORIENTATION_HORIZONTAL)  {
 152                 requisition = widget->requisition.width;
 153                 allocation = widget->allocation.width;
 154                 adjustment = view->hadjustment;
 155         } else {
 156                 requisition = widget->requisition.height;
 157                 allocation = widget->allocation.height;
 158                 adjustment = view->vadjustment;
 159         }
 160
 161         if (!adjustment)
 162                 return;
 163
 164         adjustment->page_size = allocation;
 165         adjustment->step_increment = allocation * 0.1;
 166         adjustment->page_increment = allocation * 0.9;
 167         adjustment->lower = 0;
 168         adjustment->upper = MAX (allocation, requisition);
 169
 170         if (adjustment->value > adjustment->upper - adjustment->page_size) {
 171                 adjustment->value = adjustment->upper - adjustment->page_size;
 172                 value_changed = TRUE;
 173         }
 174
 175         gtk_adjustment_changed (adjustment);
 176         if (value_changed)
 177                 gtk_adjustment_value_changed (adjustment);
 178 }
 179
 180 /*** Virtual function implementations ***/
 181
 182 static void
 183 ev_view_finalize (GObject *object)
 184 {
 185         EvView *view = EV_VIEW (object);
 186
 187         if (view->document)
 188                 g_object_unref (view->document);
 189
 190         ev_view_set_scroll_adjustments (view, NULL, NULL);
 191
 192         g_array_free (view->find_results, TRUE);
 193         view->find_results = NULL;
 194
 195         G_OBJECT_CLASS (ev_view_parent_class)->finalize (object);
 196 }
 197
 198 static void
 199 ev_view_destroy (GtkObject *object)
 200 {
 201         EvView *view = EV_VIEW (object);
 202
 203         ev_view_set_scroll_adjustments (view, NULL, NULL);
 204
 205         GTK_OBJECT_CLASS (ev_view_parent_class)->destroy (object);
 206 }
 207
 208 static void
 209 ev_view_size_request (GtkWidget      *widget,
 210                       GtkRequisition *requisition)
 211 {
 212         EvView *view = EV_VIEW (widget);
 213
 214         if (GTK_WIDGET_REALIZED (widget)) {
 215                 if (view->document) {
 216                         ev_document_get_page_size (view->document,
 217                                                    &requisition->width,
 218                                                    &requisition->height);
 219                 } else {
 220                         requisition->width = 10;
 221                         requisition->height = 10;
 222                 }
 223
 224                 requisition->width += 2;
 225                 requisition->height += 2;
 226         }
 227
 228 }
 229
 230 static void
 231 ev_view_size_allocate (GtkWidget      *widget,
 232                        GtkAllocation  *allocation)
 233 {
 234         EvView *view = EV_VIEW (widget);
 235
 236         GTK_WIDGET_CLASS (ev_view_parent_class)->size_allocate (widget, allocation);
 237
 238         view_set_adjustment_values (view, GTK_ORIENTATION_HORIZONTAL);
 239         view_set_adjustment_values (view, GTK_ORIENTATION_VERTICAL);
 240
 241         if (GTK_WIDGET_REALIZED (widget)) {
 242                 gdk_window_resize (view->bin_window,
 243                                    MAX (widget->allocation.width, widget->requisition.width),
 244                                    MAX (widget->allocation.height, widget->requisition.height));
 245         }
 246 }
 247
 248 static void
 249 ev_view_realize (GtkWidget *widget)
 250 {
 251         EvView *view = EV_VIEW (widget);
 252         GdkWindowAttr attributes;
 253
 254         GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 255
 256         attributes.window_type = GDK_WINDOW_CHILD;
 257         attributes.wclass = GDK_INPUT_OUTPUT;
 258         attributes.visual = gtk_widget_get_visual (widget);
 259         attributes.colormap = gtk_widget_get_colormap (widget);
 260
 261         attributes.x = widget->allocation.x;
 262         attributes.y = widget->allocation.y;
 263         attributes.width = widget->allocation.width;
 264         attributes.height = widget->allocation.height;
 265         attributes.event_mask = 0;
 266
 267         widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 268                                          &attributes,
 269                                          GDK_WA_X | GDK_WA_Y |
 270                                          GDK_WA_COLORMAP |
 271                                          GDK_WA_VISUAL);
 272         gdk_window_set_user_data (widget->window, widget);
 273         widget->style = gtk_style_attach (widget->style, widget->window);
 274
 275         attributes.x = 0;
 276         attributes.y = 0;
 277         attributes.width = MAX (widget->allocation.width, widget->requisition.width);
 278         attributes.height = MAX (widget->allocation.height, widget->requisition.height);
 279         attributes.event_mask = GDK_EXPOSURE_MASK |
 280                                 GDK_BUTTON_PRESS_MASK |
 281                                 GDK_BUTTON_RELEASE_MASK |
 282                                 GDK_SCROLL_MASK |
 283                                 GDK_KEY_PRESS_MASK |
 284                                 GDK_POINTER_MOTION_MASK;
 285
 286         view->bin_window = gdk_window_new (widget->window,
 287                                            &attributes,
 288                                            GDK_WA_X | GDK_WA_Y |
 289                                            GDK_WA_COLORMAP |
 290                                            GDK_WA_VISUAL);
 291         gdk_window_set_user_data (view->bin_window, widget);
 292         gdk_window_show (view->bin_window);
 293
 294         widget->style = gtk_style_attach (widget->style, view->bin_window);
 295         gdk_window_set_background (view->bin_window, &widget->style->mid[widget->state]);
 296
 297         if (view->document) {
 298                 ev_document_set_target (view->document, view->bin_window);
 299
 300                 /* We can't get page size without a target, so we have to
 301                  * queue a size request at realization. Could be fixed
 302                  * with EvDocument changes to allow setting a GdkScreen
 303                  * without setting a target.
 304                  */
 305                 gtk_widget_queue_resize (widget);
 306         }
 307 }
 308
 309 static void
 310 ev_view_unrealize (GtkWidget *widget)
 311 {
 312         EvView *view = EV_VIEW (widget);
 313
 314         if (view->document)
 315                 ev_document_set_target (view->document, NULL);
 316
 317         gdk_window_set_user_data (view->bin_window, NULL);
 318         gdk_window_destroy (view->bin_window);
 319         view->bin_window = NULL;
 320
 321         GTK_WIDGET_CLASS (ev_view_parent_class)->unrealize (widget);
 322 }
 323
 324 static guint32
 325 ev_gdk_color_to_rgb (const GdkColor *color)
 326 {
 327   guint32 result;
 328   result = (0xff0000 | (color->red & 0xff00));
 329   result <<= 8;
 330   result |= ((color->green & 0xff00) | (color->blue >> 8));
 331   return result;
 332 }
 333
 334 static void
 335 draw_rubberband (GtkWidget *widget, GdkWindow *window, const GdkRectangle *rect)
 336 {
 337         GdkGC *gc;
 338         GdkPixbuf *pixbuf;
 339         GdkColor *fill_color_gdk;
 340         guint fill_color;
 341
 342         fill_color_gdk = gdk_color_copy (&GTK_WIDGET (widget)->style->base[GTK_STATE_SELECTED]);
 343         fill_color = ev_gdk_color_to_rgb (fill_color_gdk) << 8 | 0x40;
 344
 345         pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
 346                                  rect->width, rect->height);
 347         gdk_pixbuf_fill (pixbuf, fill_color);
 348
 349         gdk_draw_pixbuf (window, NULL, pixbuf,
 350                          0, 0,
 351                          rect->x,rect->y,
 352                          rect->width, rect->height,
 353                          GDK_RGB_DITHER_NONE,
 354                          0, 0);
 355
 356         g_object_unref (pixbuf);
 357
 358         gc = gdk_gc_new (window);
 359         gdk_gc_set_rgb_fg_color (gc, fill_color_gdk);
 360         gdk_draw_rectangle (window, gc, FALSE,
 361                             rect->x, rect->y,
 362                             rect->width - 1,
 363                             rect->height - 1);
 364         g_object_unref (gc);
 365
 366         gdk_color_free (fill_color_gdk);
 367 }
 368
 369 static void
 370 expose_bin_window (GtkWidget      *widget,
 371                    GdkEventExpose *event)
 372 {
 373         EvView *view = EV_VIEW (widget);
 374         int i, current_page;
 375         int x_offset, y_offset;
 376         const EvFindResult *results;
 377
 378         if (view->document == NULL)
 379                 return;
 380
 381         x_offset = MAX (0, (widget->allocation.width -
 382                             widget->requisition.width) / 2);
 383         y_offset = MAX (0, (widget->allocation.height -
 384                             widget->requisition.height) / 2);
 385         gdk_draw_rectangle (view->bin_window,
 386                             widget->style->black_gc,
 387                             FALSE,
 388                             x_offset,
 389                             y_offset,
 390                             widget->requisition.width - 1,
 391                             widget->requisition.height - 1);
 392
 393         ev_document_set_page_offset (view->document,
 394                                      x_offset + 1,
 395                                      y_offset + 1);
 396
 397         ev_document_render (view->document,
 398                             event->area.x, event->area.y,
 399                             event->area.width, event->area.height);
 400
 401         results = (EvFindResult*) view->find_results->data;
 402         current_page = ev_document_get_page (view->document);
 403         i = 0;
 404         while (i < view->find_results->len) {
 405 #if 0
 406                 g_printerr ("highlighting result %d page %d at %d,%d %dx%d\n",
 407                             i, results[i].page_num,
 408                             results[i].highlight_area.x,
 409                             results[i].highlight_area.y,
 410                             results[i].highlight_area.width,
 411                             results[i].highlight_area.height);
 412 #endif
 413                 if (results[i].page_num == current_page) {
 414                         GdkRectangle highlight_area_fixed;
 415                         highlight_area_fixed.x = results[i].highlight_area.x + x_offset + 1;
 416                         highlight_area_fixed.y = results[i].highlight_area.y + y_offset + 1;
 417                         highlight_area_fixed.width = results[i].highlight_area.width;
 418                         highlight_area_fixed.height = results[i].highlight_area.height;
 419
 420                         draw_rubberband (widget, view->bin_window,
 421                                          &highlight_area_fixed);
 422                 }
 423                 ++i;
 424         }
 425
 426         if (view->has_selection) {
 427                 draw_rubberband (widget, view->bin_window, &view->selection);
 428         }
 429 }
 430
 431 static gboolean
 432 ev_view_expose_event (GtkWidget      *widget,
 433                       GdkEventExpose *event)
 434 {
 435         EvView *view = EV_VIEW (widget);
 436
 437         if (event->window == view->bin_window)
 438                 expose_bin_window (widget, event);
 439         else
 440                 return GTK_WIDGET_CLASS (ev_view_parent_class)->expose_event (widget, event);
 441
 442         return FALSE;
 443 }
 444
 445 void
 446 ev_view_select_all (EvView *ev_view)
 447 {
 448         GtkWidget *widget = GTK_WIDGET (ev_view);
 449
 450         g_return_if_fail (EV_IS_VIEW (ev_view));
 451
 452         ev_view->has_selection = TRUE;
 453         ev_view->selection.x = ev_view->selection.y = 0;
 454         ev_view->selection.width = widget->requisition.width;
 455         ev_view->selection.height = widget->requisition.height;
 456
 457         gtk_widget_queue_draw (widget);
 458 }
 459
 460 void
 461 ev_view_copy (EvView *ev_view)
 462 {
 463         GtkClipboard *clipboard;
 464         char *text;
 465
 466         text = ev_document_get_text (ev_view->document, &ev_view->selection);
 467         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 468                                               GDK_SELECTION_CLIPBOARD);
 469         gtk_clipboard_set_text (clipboard, text, -1);
 470         g_free (text);
 471 }
 472
 473 static void
 474 ev_view_primary_get_cb (GtkClipboard     *clipboard,
 475                         GtkSelectionData *selection_data,
 476                         guint             info,
 477                         gpointer          data)
 478 {
 479         EvView *ev_view = EV_VIEW (data);
 480         char *text;
 481
 482         text = ev_document_get_text (ev_view->document, &ev_view->selection);
 483         gtk_selection_data_set_text (selection_data, text, -1);
 484 }
 485
 486 static void
 487 ev_view_primary_clear_cb (GtkClipboard *clipboard,
 488                           gpointer      data)
 489 {
 490         EvView *ev_view = EV_VIEW (data);
 491
 492         ev_view->has_selection = FALSE;
 493 }
 494
 495 static void
 496 ev_view_update_primary_selection (EvView *ev_view)
 497 {
 498         GtkClipboard *clipboard;
 499
 500         clipboard = gtk_widget_get_clipboard (GTK_WIDGET (ev_view),
 501                                               GDK_SELECTION_PRIMARY);
 502
 503         if (ev_view->has_selection) {
 504                 if (!gtk_clipboard_set_with_owner (clipboard,
 505                                                    targets,
 506                                                    G_N_ELEMENTS (targets),
 507                                                    ev_view_primary_get_cb,
 508                                                    ev_view_primary_clear_cb,
 509                                                    G_OBJECT (ev_view)))
 510                         ev_view_primary_clear_cb (clipboard, ev_view);
 511         } else {
 512                 if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (ev_view))
 513                         gtk_clipboard_clear (clipboard);
 514         }
 515 }
 516
 517 static gboolean
 518 ev_view_button_press_event (GtkWidget      *widget,
 519                             GdkEventButton *event)
 520 {
 521         EvView *view = EV_VIEW (widget);
 522
 523         if (!GTK_WIDGET_HAS_FOCUS (widget)) {
 524                 gtk_widget_grab_focus (widget);
 525         }
 526
 527         view->pressed_button = event->button;
 528
 529         switch (event->button) {
 530                 case 1:
 531                         if (view->has_selection) {
 532                                 view->has_selection = FALSE;
 533                                 gtk_widget_queue_draw (widget);
 534                         }
 535
 536                         view->selection_start.x = event->x;
 537                         view->selection_start.y = event->y;
 538                         break;
 539         }
 540
 541         return TRUE;
 542 }
 543
 544 static char *
 545 status_message_from_link (EvLink *link)
 546 {
 547         EvLinkType type;
 548         char *msg;
 549         int page;
 550
 551         type = ev_link_get_link_type (link);
 552
 553         switch (type) {
 554                 case EV_LINK_TYPE_TITLE:
 555                         msg = g_strdup (ev_link_get_title (link));
 556                         break;
 557                 case EV_LINK_TYPE_PAGE:
 558                         page = ev_link_get_page (link);
 559                         msg = g_strdup_printf (_("Go to page %d"), page);
 560                         break;
 561                 case EV_LINK_TYPE_EXTERNAL_URI:
 562                         msg = g_strdup (ev_link_get_uri (link));
 563                         break;
 564                 default:
 565                         msg = NULL;
 566         }
 567
 568         return msg;
 569 }
 570
 571 static void
 572 ev_view_set_status (EvView *view, const char *message)
 573 {
 574         g_return_if_fail (EV_IS_VIEW (view));
 575
 576         if (message != view->status) {
 577                 g_free (view->status);
 578                 view->status = g_strdup (message);
 579                 g_object_notify (G_OBJECT (view), "status");
 580         }
 581 }
 582
 583 static void
 584 ev_view_set_find_status (EvView *view, const char *message)
 585 {
 586         g_return_if_fail (EV_IS_VIEW (view));
 587
 588         g_free (view->find_status);
 589         view->find_status = g_strdup (message);
 590         g_object_notify (G_OBJECT (view), "find-status");
 591 }
 592
 593 static void
 594 ev_view_set_cursor (EvView *view, EvViewCursor new_cursor)
 595 {
 596         GdkCursor *cursor = NULL;
 597         GdkDisplay *display;
 598         GtkWidget *widget;
 599
 600         if (view->cursor == new_cursor) {
 601                 return;
 602         }
 603
 604         widget = gtk_widget_get_toplevel (GTK_WIDGET (view));
 605         display = gtk_widget_get_display (widget);
 606         view->cursor = new_cursor;
 607
 608         switch (new_cursor) {
 609                 case EV_VIEW_CURSOR_NORMAL:
 610                         gdk_window_set_cursor (widget->window, NULL);
 611                         break;
 612                 case EV_VIEW_CURSOR_LINK:
 613                         cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
 614                         break;
 615                 case EV_VIEW_CURSOR_WAIT:
 616                         cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
 617                         break;
 618         }
 619
 620         if (cursor) {
 621                 gdk_window_set_cursor (widget->window, cursor);
 622                 gdk_cursor_unref (cursor);
 623                 gdk_flush();
 624         }
 625 }
 626
 627 static gboolean
 628 ev_view_motion_notify_event (GtkWidget      *widget,
 629                              GdkEventMotion *event)
 630 {
 631         EvView *view = EV_VIEW (widget);
 632
 633         if (view->pressed_button > 0) {
 634                 view->has_selection = TRUE;
 635                 view->selection.x = MIN (view->selection_start.x, event->x);
 636                 view->selection.y = MIN (view->selection_start.y, event->y);
 637                 view->selection.width = ABS (view->selection_start.x - event->x) + 1;
 638                 view->selection.height = ABS (view->selection_start.y - event->y) + 1;
 639         } else if (view->document) {
 640                 EvLink *link;
 641
 642                 link = ev_document_get_link (view->document, event->x, event->y);
 643                 if (link) {
 644                         char *msg;
 645
 646                         msg = status_message_from_link (link);
 647                         ev_view_set_status (view, msg);
 648                         ev_view_set_cursor (view, EV_VIEW_CURSOR_LINK);
 649                         g_free (msg);
 650
 651                         g_object_unref (link);
 652                 } else {
 653                         ev_view_set_status (view, NULL);
 654                         if (view->cursor == EV_VIEW_CURSOR_LINK) {
 655                                 ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
 656                         }
 657                 }
 658         }
 659
 660         gtk_widget_queue_draw (widget);
 661
 662         return TRUE;
 663 }
 664
 665 static gboolean
 666 ev_view_button_release_event (GtkWidget      *widget,
 667                               GdkEventButton *event)
 668 {
 669         EvView *view = EV_VIEW (widget);
 670
 671         view->pressed_button = -1;
 672
 673         if (view->has_selection) {
 674                 ev_view_update_primary_selection (view);
 675         } else if (view->document) {
 676                 EvLink *link;
 677
 678                 link = ev_document_get_link (view->document,
 679                                              event->x,
 680                                              event->y);
 681                 if (link) {
 682                         ev_view_go_to_link (view, link);
 683                         g_object_unref (link);
 684                 }
 685         }
 686
 687         return FALSE;
 688 }
 689
 690 static void
 691 on_adjustment_value_changed (GtkAdjustment  *adjustment,
 692                              EvView *view)
 693 {
 694         view_update_adjustments (view);
 695 }
 696
 697 static void
 698 set_scroll_adjustment (EvView *view,
 699                        GtkOrientation  orientation,
 700                        GtkAdjustment  *adjustment)
 701 {
 702         GtkAdjustment **to_set;
 703
 704         if (orientation == GTK_ORIENTATION_HORIZONTAL)
 705                 to_set = &view->hadjustment;
 706         else
 707                 to_set = &view->vadjustment;
 708
 709         if (*to_set != adjustment) {
 710                 if (*to_set) {
 711                         g_signal_handlers_disconnect_by_func (*to_set,
 712                                                               (gpointer) on_adjustment_value_changed,
 713                                                               view);
 714                         g_object_unref (*to_set);
 715                 }
 716
 717                 *to_set = adjustment;
 718                 view_set_adjustment_values (view, orientation);
 719
 720                 if (*to_set) {
 721                         g_object_ref (*to_set);
 722                         g_signal_connect (*to_set, "value_changed",
 723                                           G_CALLBACK (on_adjustment_value_changed), view);
 724                 }
 725         }
 726 }
 727
 728 static void
 729 ev_view_set_scroll_adjustments (EvView *view,
 730                                 GtkAdjustment  *hadjustment,
 731                                 GtkAdjustment  *vadjustment)
 732 {
 733         set_scroll_adjustment (view, GTK_ORIENTATION_HORIZONTAL, hadjustment);
 734         set_scroll_adjustment (view, GTK_ORIENTATION_VERTICAL, vadjustment);
 735
 736         view_update_adjustments (view);
 737 }
 738
 739 static void
 740 add_scroll_binding (GtkBindingSet  *binding_set,
 741                     guint           keyval,
 742                     GtkScrollType   scroll,
 743                     gboolean        horizontal)
 744 {
 745   guint keypad_keyval = keyval - GDK_Left + GDK_KP_Left;
 746
 747   gtk_binding_entry_add_signal (binding_set, keyval, 0,
 748                                 "scroll_view", 2,
 749                                 GTK_TYPE_SCROLL_TYPE, scroll,
 750                                 G_TYPE_BOOLEAN, horizontal);
 751   gtk_binding_entry_add_signal (binding_set, keypad_keyval, 0,
 752                                 "scroll_view", 2,
 753                                 GTK_TYPE_SCROLL_TYPE, scroll,
 754                                 G_TYPE_BOOLEAN, horizontal);
 755 }
 756
 757 static void
 758 ev_view_scroll_view (EvView *view,
 759                      GtkScrollType scroll,
 760                      gboolean horizontal)
 761 {
 762         if (scroll == GTK_SCROLL_PAGE_BACKWARD) {
 763                 ev_view_set_page (view, ev_view_get_page (view) - 1);
 764         } else if (scroll == GTK_SCROLL_PAGE_FORWARD) {
 765                 ev_view_set_page (view, ev_view_get_page (view) + 1);
 766         } else {
 767                 GtkAdjustment *adjustment;
 768                 double value;
 769
 770                 if (horizontal) {
 771                         adjustment = view->hadjustment;
 772                 } else {
 773                         adjustment = view->vadjustment;
 774                 }
 775
 776                 value = adjustment->value;
 777
 778                 switch (scroll) {
 779                         case GTK_SCROLL_STEP_BACKWARD:
 780                                 value -= adjustment->step_increment;
 781                                 break;
 782                         case GTK_SCROLL_STEP_FORWARD:
 783                                 value += adjustment->step_increment;
 784                                 break;
 785                         default:
 786                                 break;
 787                 }
 788
 789                 value = CLAMP (value, adjustment->lower,
 790                                adjustment->upper - adjustment->page_size);
 791
 792                 gtk_adjustment_set_value (adjustment, value);
 793         }
 794 }
 795
 796 static void
 797 ev_view_set_property (GObject *object,
 798                       guint prop_id,
 799                       const GValue *value,
 800                       GParamSpec *pspec)
 801 {
 802         switch (prop_id)
 803         {
 804                 /* Read only */
 805                 case PROP_STATUS:
 806                 case PROP_FIND_STATUS:
 807                         break;
 808         }
 809 }
 810
 811 static void
 812 ev_view_get_property (GObject *object,
 813                       guint prop_id,
 814                       GValue *value,
 815                       GParamSpec *pspec)
 816 {
 817         EvView *view = EV_VIEW (object);
 818
 819         switch (prop_id)
 820         {
 821                 case PROP_STATUS:
 822                         g_value_set_string (value, view->status);
 823                         break;
 824                 case PROP_FIND_STATUS:
 825                         g_value_set_string (value, view->status);
 826                         break;
 827         }
 828 }
 829
 830 static void
 831 ev_view_class_init (EvViewClass *class)
 832 {
 833         GObjectClass *object_class = G_OBJECT_CLASS (class);
 834         GtkObjectClass *gtk_object_class = GTK_OBJECT_CLASS (class);
 835         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 836         GtkBindingSet *binding_set;
 837
 838         object_class->finalize = ev_view_finalize;
 839         object_class->set_property = ev_view_set_property;
 840         object_class->get_property = ev_view_get_property;
 841
 842         widget_class->expose_event = ev_view_expose_event;
 843         widget_class->button_press_event = ev_view_button_press_event;
 844         widget_class->motion_notify_event = ev_view_motion_notify_event;
 845         widget_class->button_release_event = ev_view_button_release_event;
 846         widget_class->size_request = ev_view_size_request;
 847         widget_class->size_allocate = ev_view_size_allocate;
 848         widget_class->realize = ev_view_realize;
 849         widget_class->unrealize = ev_view_unrealize;
 850         gtk_object_class->destroy = ev_view_destroy;
 851
 852         class->set_scroll_adjustments = ev_view_set_scroll_adjustments;
 853         class->scroll_view = ev_view_scroll_view;
 854
 855         widget_class->set_scroll_adjustments_signal =  g_signal_new ("set-scroll-adjustments",
 856                                                                      G_OBJECT_CLASS_TYPE (object_class),
 857                                                                      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 858                                                                      G_STRUCT_OFFSET (EvViewClass, set_scroll_adjustments),
 859                                                                      NULL, NULL,
 860                                                                      ev_marshal_VOID__OBJECT_OBJECT,
 861                                                                      G_TYPE_NONE, 2,
 862                                                                      GTK_TYPE_ADJUSTMENT,
 863                                                                      GTK_TYPE_ADJUSTMENT);
 864         page_changed_signal = g_signal_new ("page-changed",
 865                                             G_OBJECT_CLASS_TYPE (object_class),
 866                                             G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 867                                             G_STRUCT_OFFSET (EvViewClass, page_changed),
 868                                             NULL, NULL,
 869                                             ev_marshal_VOID__NONE,
 870                                             G_TYPE_NONE, 0);
 871
 872         g_signal_new ("scroll_view",
 873                       G_TYPE_FROM_CLASS (object_class),
 874                       G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 875                       G_STRUCT_OFFSET (EvViewClass, scroll_view),
 876                       NULL, NULL,
 877                       ev_marshal_VOID__ENUM_BOOLEAN,
 878                       G_TYPE_NONE, 2,
 879                       GTK_TYPE_SCROLL_TYPE,
 880                       G_TYPE_BOOLEAN);
 881
 882         g_object_class_install_property (object_class,
 883                                          PROP_STATUS,
 884                                          g_param_spec_string ("status",
 885                                                               "Status Message",
 886                                                               "The status message",
 887                                                               NULL,
 888                                                               G_PARAM_READABLE));
 889
 890         g_object_class_install_property (object_class,
 891                                          PROP_STATUS,
 892                                          g_param_spec_string ("find-status",
 893                                                               "Find Status Message",
 894                                                               "The find status message",
 895                                                               NULL,
 896                                                               G_PARAM_READABLE));
 897
 898         binding_set = gtk_binding_set_by_class (class);
 899
 900         add_scroll_binding (binding_set, GDK_Left,  GTK_SCROLL_STEP_BACKWARD, TRUE);
 901         add_scroll_binding (binding_set, GDK_Right, GTK_SCROLL_STEP_FORWARD,  TRUE);
 902         add_scroll_binding (binding_set, GDK_Up,    GTK_SCROLL_STEP_BACKWARD, FALSE);
 903         add_scroll_binding (binding_set, GDK_Down,  GTK_SCROLL_STEP_FORWARD,  FALSE);
 904
 905         add_scroll_binding (binding_set, GDK_Page_Up,   GTK_SCROLL_PAGE_BACKWARD, FALSE);
 906         add_scroll_binding (binding_set, GDK_Page_Down, GTK_SCROLL_PAGE_FORWARD,  FALSE);
 907 }
 908
 909 static void
 910 ev_view_init (EvView *view)
 911 {
 912         GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
 913
 914         view->scale = 1.0;
 915         view->pressed_button = -1;
 916         view->cursor = EV_VIEW_CURSOR_NORMAL;
 917
 918         view->find_results = g_array_new (FALSE,
 919                                           FALSE,
 920                                           sizeof (EvFindResult));
 921         view->results_on_this_page = 0;
 922         view->next_page_with_result = 0;
 923 }
 924
 925 static char *
 926 ev_view_get_find_status_message (EvView *view)
 927 {
 928         if (view->find_results->len == 0) {
 929                 if (view->find_percent_complete >= (1.0 - 1e-10)) {
 930                         return g_strdup (_("Not found"));
 931                 } else {
 932                         return g_strdup_printf (_("%3d%% remaining to search"),
 933                                                 (int) ((1.0 - view->find_percent_complete) * 100));
 934                 }
 935         } else if (view->results_on_this_page == 0) {
 936                 g_assert (view->next_page_with_result != 0);
 937                 return g_strdup_printf (_("Found on page %d"),
 938                                         view->next_page_with_result);
 939         } else {
 940                 return g_strdup_printf (_("%d found on this page"),
 941                                         view->results_on_this_page);
 942         }
 943 }
 944
 945 static void
 946 update_find_results (EvView *view)
 947 {
 948         const EvFindResult *results;
 949         int i;
 950         int on_this_page;
 951         int next_page_with_result;
 952         int earliest_page_with_result;
 953         int current_page;
 954         gboolean counts_changed;
 955
 956         results = (EvFindResult*) view->find_results->data;
 957         current_page = ev_document_get_page (view->document);
 958         next_page_with_result = 0;
 959         on_this_page = 0;
 960         earliest_page_with_result = 0;
 961
 962         i = 0;
 963         while (i < view->find_results->len) {
 964                 if (results[i].page_num == current_page) {
 965                         ++on_this_page;
 966                 } else {
 967                         int delta = results[i].page_num - current_page;
 968
 969                         if (delta > 0 && /* result on later page */
 970                             (next_page_with_result == 0 ||
 971                              results[i].page_num < next_page_with_result))
 972                                 next_page_with_result = results[i].page_num;
 973
 974                         if (delta < 0 && /* result on a previous page */
 975                             (earliest_page_with_result == 0 ||
 976                              results[i].page_num < earliest_page_with_result))
 977                                 earliest_page_with_result = results[i].page_num;
 978                 }
 979                 ++i;
 980         }
 981
 982         /* If earliest page is just the current page, there is no earliest page */
 983         if (earliest_page_with_result == current_page)
 984                 earliest_page_with_result = 0;
 985
 986         /* If no next page, then wrap and the wrapped page is the next page */
 987         if (next_page_with_result == 0)
 988                 next_page_with_result = earliest_page_with_result;
 989
 990         counts_changed = FALSE;
 991         if (on_this_page != view->results_on_this_page ||
 992             next_page_with_result != view->next_page_with_result) {
 993                 view->results_on_this_page = on_this_page;
 994                 view->next_page_with_result = next_page_with_result;
 995                 counts_changed = TRUE;
 996         }
 997
 998         if (counts_changed ||
 999             view->find_results->len == 0) {
1000                 char *message;
1001
1002                 message = ev_view_get_find_status_message (view);
1003                 ev_view_set_find_status (view, message);
1004                 g_free (message);
1005         }
1006 }
1007
1008 static void
1009 found_results_callback (EvDocument         *document,
1010                         const EvFindResult *results,
1011                         int                 n_results,
1012                         double              percent_complete,
1013                         void               *data)
1014 {
1015   EvView *view = EV_VIEW (data);
1016
1017   g_array_set_size (view->find_results, 0);
1018
1019   if (n_results > 0)
1020           g_array_append_vals (view->find_results,
1021                                results, n_results);
1022
1023 #if 0
1024   {
1025           int i;
1026
1027           g_printerr ("%d results %d%%: ", n_results,
1028                       (int) (percent_complete * 100));
1029           i = 0;
1030           while (i < n_results) {
1031                   g_printerr ("%d ", results[i].page_num);
1032                   ++i;
1033           }
1034           g_printerr ("\n");
1035   }
1036 #endif
1037
1038   view->find_percent_complete = percent_complete;
1039   update_find_results (view);
1040
1041   gtk_widget_queue_draw (GTK_WIDGET (view));
1042 }
1043
1044 static void
1045 document_changed_callback (EvDocument *document,
1046                            EvView     *view)
1047 {
1048         gtk_widget_queue_draw (GTK_WIDGET (view));
1049         ev_view_set_cursor (view, EV_VIEW_CURSOR_NORMAL);
1050 }
1051
1052 /*** Public API ***/
1053
1054 GtkWidget*
1055 ev_view_new (void)
1056 {
1057         return g_object_new (EV_TYPE_VIEW, NULL);
1058 }
1059
1060 void
1061 ev_view_set_document (EvView     *view,
1062                       EvDocument *document)
1063 {
1064         g_return_if_fail (EV_IS_VIEW (view));
1065
1066         if (document != view->document) {
1067                 if (view->document) {
1068                         g_signal_handlers_disconnect_by_func (view->document,
1069                                                               found_results_callback,
1070                                                               view);
1071                         g_array_set_size (view->find_results, 0);
1072                         view->results_on_this_page = 0;
1073                         view->next_page_with_result = 0;
1074
1075                         g_object_unref (view->document);
1076                 }
1077
1078                 view->document = document;
1079
1080                 if (view->document) {
1081                         g_object_ref (view->document);
1082                         if (EV_IS_DOCUMENT_FIND (view->document))
1083                                 g_signal_connect (view->document,
1084                                                   "found",
1085                                                   G_CALLBACK (found_results_callback),
1086                                                   view);
1087                         g_signal_connect (view->document,
1088                                           "changed",
1089                                           G_CALLBACK (document_changed_callback),
1090                                           view);
1091                 }
1092
1093                 if (GTK_WIDGET_REALIZED (view))
1094                         ev_document_set_target (view->document, view->bin_window);
1095
1096                 gtk_widget_queue_resize (GTK_WIDGET (view));
1097
1098                 g_signal_emit (view, page_changed_signal, 0);
1099         }
1100 }
1101
1102 static void
1103 set_document_page (EvView *view, int page)
1104 {
1105         if (view->document) {
1106                 int old_page = ev_document_get_page (view->document);
1107                 int old_width, old_height;
1108
1109                 ev_document_get_page_size (view->document,
1110                                            &old_width, &old_height);
1111
1112                 if (old_page != page) {
1113                         ev_view_set_cursor (view, EV_VIEW_CURSOR_WAIT);
1114                         ev_document_set_page (view->document, page);
1115                 }
1116
1117                 if (old_page != ev_document_get_page (view->document)) {
1118                         int width, height;
1119
1120                         g_signal_emit (view, page_changed_signal, 0);
1121
1122                         view->has_selection = FALSE;
1123                         ev_document_get_page_size (view->document,
1124                                                    &width, &height);
1125                         if (width != old_width || height != old_height)
1126                                 gtk_widget_queue_resize (GTK_WIDGET (view));
1127
1128                         view->find_percent_complete = 0.0;
1129                         update_find_results (view);
1130                 }
1131         }
1132 }
1133
1134 static void
1135 go_to_link (EvView *view, EvLink *link)
1136 {
1137         EvLinkType type;
1138         const char *uri;
1139         int page;
1140
1141         type = ev_link_get_link_type (link);
1142
1143         switch (type) {
1144                 case EV_LINK_TYPE_TITLE:
1145                         break;
1146                 case EV_LINK_TYPE_PAGE:
1147                         page = ev_link_get_page (link);
1148                         set_document_page (view, page);
1149                         break;
1150                 case EV_LINK_TYPE_EXTERNAL_URI:
1151                         uri = ev_link_get_uri (link);
1152                         gnome_vfs_url_show (uri);
1153                         break;
1154         }
1155 }
1156
1157 void
1158 ev_view_go_to_link (EvView *view, EvLink *link)
1159 {
1160         go_to_link (view, link);
1161 }
1162
1163 void
1164 ev_view_set_page (EvView *view,
1165                   int     page)
1166 {
1167         g_return_if_fail (EV_IS_VIEW (view));
1168
1169         set_document_page (view, page);
1170 }
1171
1172 int
1173 ev_view_get_page (EvView *view)
1174 {
1175         if (view->document)
1176                 return ev_document_get_page (view->document);
1177         else
1178                 return 1;
1179 }
1180
1181 #define ZOOM_IN_FACTOR  1.2
1182 #define ZOOM_OUT_FACTOR (1.0/ZOOM_IN_FACTOR)
1183
1184 #define MIN_SCALE 0.05409
1185 #define MAX_SCALE 18.4884
1186
1187 static void
1188 ev_view_zoom (EvView   *view,
1189               double    factor,
1190               gboolean  relative)
1191 {
1192         double scale;
1193
1194         if (relative)
1195                 scale = view->scale * factor;
1196         else
1197                 scale = factor;
1198
1199         view->scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
1200
1201         ev_document_set_scale (view->document, view->scale);
1202
1203         gtk_widget_queue_resize (GTK_WIDGET (view));
1204 }
1205
1206 void
1207 ev_view_zoom_in (EvView *view)
1208 {
1209         ev_view_zoom (view, ZOOM_IN_FACTOR, TRUE);
1210 }
1211
1212 void
1213 ev_view_zoom_out (EvView *view)
1214 {
1215         ev_view_zoom (view, ZOOM_OUT_FACTOR, TRUE);
1216 }
1217
1218 void
1219 ev_view_normal_size (EvView *view)
1220 {
1221         ev_view_zoom (view, 1.0, FALSE);
1222 }
1223
1224 void
1225 ev_view_best_fit (EvView *view)
1226 {
1227         double scale;
1228         int width, height;
1229
1230         width = height = 0;
1231         ev_document_get_page_size (view->document, &width, &height);
1232
1233         scale = 1.0;
1234         if (width != 0 && height != 0) {
1235                 double scale_w, scale_h;
1236
1237                 scale_w = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
1238                 scale_h = (double)GTK_WIDGET (view)->allocation.height * view->scale / height;
1239
1240                 scale = (scale_w < scale_h) ? scale_w : scale_h;
1241         }
1242
1243         ev_view_zoom (view, scale, FALSE);
1244 }
1245
1246 void
1247 ev_view_fit_width (EvView *view)
1248 {
1249         double scale = 1.0;
1250         int width;
1251
1252         width = 0;
1253         ev_document_get_page_size (view->document, &width, NULL);
1254
1255         scale = 1.0;
1256         if (width != 0)
1257                 scale = (double)GTK_WIDGET (view)->allocation.width * view->scale / width;
1258
1259         ev_view_zoom (view, scale, FALSE);
1260 }
1261
1262 const char *
1263 ev_view_get_status (EvView *view)
1264 {
1265         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1266
1267         return view->status;
1268 }
1269
1270 const char *
1271 ev_view_get_find_status (EvView *view)
1272 {
1273         g_return_val_if_fail (EV_IS_VIEW (view), NULL);
1274
1275         return view->find_status;
1276 }
1277
1278