/*

 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing;

import java.awt.Component;

import java.awt.Container;

import java.awt.Rectangle;

import java.awt.event.PaintEvent;

import java.security.AccessController;

import sun.awt.AppContext;

import sun.awt.SunToolkit;

import sun.awt.event.IgnorePaintEvent;

import sun.security.action.GetBooleanAction;

import sun.security.action.GetPropertyAction;

/**

 * Swing's PaintEventDispatcher.  If the component specified by the PaintEvent

 * is a top level Swing component (JFrame, JWindow, JDialog, JApplet), this

 * will forward the request to the RepaintManager for eventual painting.

 *

 */

class SwingPaintEventDispatcher extends sun.awt.PaintEventDispatcher {

    private static final boolean SHOW_FROM_DOUBLE_BUFFER;

    private static final boolean ERASE_BACKGROUND;

    static {

        SHOW_FROM_DOUBLE_BUFFER = "true".equals(AccessController.doPrivileged(

              new GetPropertyAction("swing.showFromDoubleBuffer", "true")));

        ERASE_BACKGROUND = AccessController.doPrivileged(

                                 new GetBooleanAction("swing.nativeErase"));

    }

    public PaintEvent createPaintEvent(Component component, int x, int y,

                                         int w, int h) {

        if (component instanceof RootPaneContainer) {

            AppContext appContext = SunToolkit.targetToAppContext(component);

            RepaintManager rm = RepaintManager.currentManager(appContext);

            if (!SHOW_FROM_DOUBLE_BUFFER ||

                  !rm.show((Container)component, x, y, w, h)) {

                rm.nativeAddDirtyRegion(appContext, (Container)component,

                                        x, y, w, h);

            }

            // For backward compatibility generate an empty paint

            // event.  Not doing this broke parts of Netbeans.

            return new IgnorePaintEvent(component, PaintEvent.PAINT,

                                        new Rectangle(x, y, w, h));

        }

        else if (component instanceof SwingHeavyWeight) {

            AppContext appContext = SunToolkit.targetToAppContext(component);

            RepaintManager rm = RepaintManager.currentManager(appContext);

            rm.nativeAddDirtyRegion(appContext, (Container)component,

                                    x, y, w, h);

            return new IgnorePaintEvent(component, PaintEvent.PAINT,

                                        new Rectangle(x, y, w, h));

        }

        return super.createPaintEvent(component, x, y, w, h);

    }

    public boolean shouldDoNativeBackgroundErase(Component c) {

        return ERASE_BACKGROUND || !(c instanceof RootPaneContainer);

    }

    public boolean queueSurfaceDataReplacing(Component c, Runnable r) {

        if (c instanceof RootPaneContainer) {

            AppContext appContext = SunToolkit.targetToAppContext(c);

            RepaintManager.currentManager(appContext).

                    nativeQueueSurfaceDataRunnable(appContext, c, r);

            return true;

        }

        return super.queueSurfaceDataReplacing(c, r);

    }

}