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nautilus-desktop-window.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */

/*
 * Nautilus
 *
 * Copyright (C) 2000 Eazel, Inc.
 *
 * Nautilus is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * Nautilus is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Authors: Darin Adler <darin@bentspoon.com>
 */

#include <config.h>
#include "nautilus-desktop-window.h"
#include "nautilus-window-private.h"
#include "nautilus-actions.h"

#include <X11/Xatom.h>
#include <gdk/gdkx.h>
#include <gtk/gtk.h>
#include <gio/gio.h>
#include <glib/gi18n.h>

#include <eel/eel-vfs-extensions.h>
#include <libnautilus-private/nautilus-file-utilities.h>
#include <libnautilus-private/nautilus-icon-names.h>
#include <libnautilus-private/nautilus-global-preferences.h>

00041 struct NautilusDesktopWindowDetails {
      gulong size_changed_id;

      gboolean loaded;
};

G_DEFINE_TYPE (NautilusDesktopWindow, nautilus_desktop_window, 
             NAUTILUS_TYPE_WINDOW);

static void
nautilus_desktop_window_dispose (GObject *obj)
{
      NautilusDesktopWindow *window = NAUTILUS_DESKTOP_WINDOW (obj);

      g_signal_handlers_disconnect_by_func (nautilus_preferences,
                                    nautilus_desktop_window_update_directory,
                                    window);

      G_OBJECT_CLASS (nautilus_desktop_window_parent_class)->dispose (obj);
}

static void
nautilus_desktop_window_constructed (GObject *obj)
{
      GtkAction *action;
      AtkObject *accessible;
      NautilusDesktopWindow *window = NAUTILUS_DESKTOP_WINDOW (obj);

      G_OBJECT_CLASS (nautilus_desktop_window_parent_class)->constructed (obj);
      
      gtk_widget_hide (NAUTILUS_WINDOW (window)->details->statusbar);
      gtk_widget_hide (NAUTILUS_WINDOW (window)->details->menubar);

      /* Don't allow close action on desktop */
      action = gtk_action_group_get_action (NAUTILUS_WINDOW (window)->details->main_action_group,
                                    NAUTILUS_ACTION_CLOSE);
      gtk_action_set_sensitive (action, FALSE);

      /* Set the accessible name so that it doesn't inherit the cryptic desktop URI. */
      accessible = gtk_widget_get_accessible (GTK_WIDGET (window));

      if (accessible) {
            atk_object_set_name (accessible, _("Desktop"));
      }

      /* Monitor the preference to have the desktop */
      /* point to the Unix home folder */
      g_signal_connect_swapped (nautilus_preferences, "changed::" NAUTILUS_PREFERENCES_DESKTOP_IS_HOME_DIR,
                          G_CALLBACK (nautilus_desktop_window_update_directory),
                          window);
}

static void
nautilus_desktop_window_init (NautilusDesktopWindow *window)
{
      window->details = G_TYPE_INSTANCE_GET_PRIVATE (window, NAUTILUS_TYPE_DESKTOP_WINDOW,
                                           NautilusDesktopWindowDetails);

      gtk_window_move (GTK_WINDOW (window), 0, 0);

      /* shouldn't really be needed given our semantic type
       * of _NET_WM_TYPE_DESKTOP, but why not
       */
      gtk_window_set_resizable (GTK_WINDOW (window),
                          FALSE);

      g_object_set_data (G_OBJECT (window), "is_desktop_window", 
                     GINT_TO_POINTER (1));
}

static gint
nautilus_desktop_window_delete_event (NautilusDesktopWindow *window)
{
      /* Returning true tells GTK+ not to delete the window. */
      return TRUE;
}

void
nautilus_desktop_window_update_directory (NautilusDesktopWindow *window)
{
      GFile *location;

      g_assert (NAUTILUS_IS_DESKTOP_WINDOW (window));

      window->details->loaded = FALSE;
      location = g_file_new_for_uri (EEL_DESKTOP_URI);
      nautilus_window_go_to (NAUTILUS_WINDOW (window), location);
      window->details->loaded = TRUE;

      g_object_unref (location);
}

static void
nautilus_desktop_window_screen_size_changed (GdkScreen             *screen,
                                   NautilusDesktopWindow *window)
{
      int width_request, height_request;

      width_request = gdk_screen_get_width (screen);
      height_request = gdk_screen_get_height (screen);
      
      g_object_set (window,
                  "width_request", width_request,
                  "height_request", height_request,
                  NULL);
}

NautilusDesktopWindow *
nautilus_desktop_window_new (GdkScreen *screen)
{
      NautilusDesktopWindow *window;
      int width_request, height_request;

      width_request = gdk_screen_get_width (screen);
      height_request = gdk_screen_get_height (screen);

      window = g_object_new (NAUTILUS_TYPE_DESKTOP_WINDOW,
                         "disable-chrome", TRUE,
                         "width_request", width_request,
                         "height_request", height_request,
                         "screen", screen,
                         NULL);

      /* Special sawmill setting*/
      gtk_window_set_wmclass (GTK_WINDOW (window), "desktop_window", "Nautilus");

      g_signal_connect (window, "delete_event", G_CALLBACK (nautilus_desktop_window_delete_event), NULL);

      /* Point window at the desktop folder.
       * Note that nautilus_desktop_window_init is too early to do this.
       */
      nautilus_desktop_window_update_directory (window);

      return window;
}

static void
map (GtkWidget *widget)
{
      /* Chain up to realize our children */
      GTK_WIDGET_CLASS (nautilus_desktop_window_parent_class)->map (widget);
      gdk_window_lower (gtk_widget_get_window (widget));
}

static void
unrealize (GtkWidget *widget)
{
      NautilusDesktopWindow *window;
      NautilusDesktopWindowDetails *details;
      GdkWindow *root_window;

      window = NAUTILUS_DESKTOP_WINDOW (widget);
      details = window->details;

      root_window = gdk_screen_get_root_window (
                        gtk_window_get_screen (GTK_WINDOW (window)));

      gdk_property_delete (root_window,
                       gdk_atom_intern ("NAUTILUS_DESKTOP_WINDOW_ID", TRUE));

      if (details->size_changed_id != 0) {
            g_signal_handler_disconnect (gtk_window_get_screen (GTK_WINDOW (window)),
                                   details->size_changed_id);
            details->size_changed_id = 0;
      }

      GTK_WIDGET_CLASS (nautilus_desktop_window_parent_class)->unrealize (widget);
}

static void
set_wmspec_desktop_hint (GdkWindow *window)
{
      GdkAtom atom;

      atom = gdk_atom_intern ("_NET_WM_WINDOW_TYPE_DESKTOP", FALSE);
        
      gdk_property_change (window,
                       gdk_atom_intern ("_NET_WM_WINDOW_TYPE", FALSE),
                       gdk_x11_xatom_to_atom (XA_ATOM), 32,
                       GDK_PROP_MODE_REPLACE, (guchar *) &atom, 1);
}

static void
set_desktop_window_id (NautilusDesktopWindow *window,
                   GdkWindow             *gdkwindow)
{
      /* Tuck the desktop windows xid in the root to indicate we own the desktop.
       */
      Window window_xid;
      GdkWindow *root_window;

      root_window = gdk_screen_get_root_window (
                        gtk_window_get_screen (GTK_WINDOW (window)));

      window_xid = GDK_WINDOW_XID (gdkwindow);

      gdk_property_change (root_window,
                       gdk_atom_intern ("NAUTILUS_DESKTOP_WINDOW_ID", FALSE),
                       gdk_x11_xatom_to_atom (XA_WINDOW), 32,
                       GDK_PROP_MODE_REPLACE, (guchar *) &window_xid, 1);
}

static void
realize (GtkWidget *widget)
{
      NautilusDesktopWindow *window;
      NautilusDesktopWindowDetails *details;

      window = NAUTILUS_DESKTOP_WINDOW (widget);
      details = window->details;

      /* Make sure we get keyboard events */
      gtk_widget_set_events (widget, gtk_widget_get_events (widget) 
                        | GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK);
                        
      /* Do the work of realizing. */
      GTK_WIDGET_CLASS (nautilus_desktop_window_parent_class)->realize (widget);

      /* This is the new way to set up the desktop window */
      set_wmspec_desktop_hint (gtk_widget_get_window (widget));

      set_desktop_window_id (window, gtk_widget_get_window (widget));

      details->size_changed_id =
            g_signal_connect (gtk_window_get_screen (GTK_WINDOW (window)), "size_changed",
                          G_CALLBACK (nautilus_desktop_window_screen_size_changed), window);
}

static NautilusIconInfo *
real_get_icon (NautilusWindow *window,
             NautilusWindowSlot *slot)
{
      return nautilus_icon_info_lookup_from_name (NAUTILUS_ICON_DESKTOP, 48);
}

static void
real_sync_title (NautilusWindow *window,
             NautilusWindowSlot *slot)
{
      /* hardcode "Desktop" */
      gtk_window_set_title (GTK_WINDOW (window), _("Desktop"));
}

static void
nautilus_desktop_window_class_init (NautilusDesktopWindowClass *klass)
{
      GtkWidgetClass *wclass = GTK_WIDGET_CLASS (klass);
      NautilusWindowClass *nclass = NAUTILUS_WINDOW_CLASS (klass);
      GObjectClass *oclass = G_OBJECT_CLASS (klass);

      oclass->constructed = nautilus_desktop_window_constructed;
      oclass->dispose = nautilus_desktop_window_dispose;

      wclass->realize = realize;
      wclass->unrealize = unrealize;
      wclass->map = map;

      nclass->window_type = NAUTILUS_WINDOW_DESKTOP;
      nclass->sync_title = real_sync_title;
      nclass->get_icon = real_get_icon;

      g_type_class_add_private (klass, sizeof (NautilusDesktopWindowDetails));
}

gboolean
nautilus_desktop_window_loaded (NautilusDesktopWindow *window)
{
      return window->details->loaded;
}

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