/*

 * Copyright 2003-2008 Sun Microsystems, Inc.  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.  Sun designates this

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

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.awt.X11;

import java.awt.*;

import java.util.HashMap;

import java.awt.event.KeyEvent;

import java.lang.reflect.*;

import sun.awt.SunToolkit;

public class XEmbeddingContainer extends XEmbedHelper implements XEventDispatcher {

    HashMap children = new HashMap();

    XEmbeddingContainer() {

    }

    XWindow embedder;

    void install(XWindow embedder) {

        this.embedder = embedder;

        XToolkit.addEventDispatcher(embedder.getWindow(), this);

    }

    void deinstall() {

        XToolkit.removeEventDispatcher(embedder.getWindow(), this);

    }

    void add(long child) {

        if (checkXEmbed(child)) {

            Component proxy = createChildProxy(child);

            ((Container)embedder.getTarget()).add("Center", proxy);

            if (proxy.getPeer() != null) {

                children.put(Long.valueOf(child), proxy.getPeer());

            }

        }

    }

    Component createChildProxy(long child) {

        return new XEmbedChildProxy(this, child);

    }

    void notifyChildEmbedded(long child) {

        sendMessage(child, XEMBED_EMBEDDED_NOTIFY, embedder.getWindow(), XEMBED_VERSION, 0);

    }

    void childResized(Component child) {

    }

    boolean checkXEmbed(long child) {

        long data = unsafe.allocateMemory(8);

        try {

            if (XEmbedInfo.getAtomData(child, data, 2)) {

                int protocol = unsafe.getInt(data);

                int flags = unsafe.getInt(data);

                return true;

            }

        } finally {

            unsafe.freeMemory(data);

        }

        return false;

    }

    void detachChild(long child) {

        // The embedder can unmap the client and reparent the client window

        // to the root window. If the client receives an ReparentNotify

        // event, it should check the parent field of the XReparentEvent

        // structure. If this is the root window of the window's screen, then

        // the protocol is finished and there is no further interaction. If

        // it is a window other than the root window, then the protocol

        // continues with the new parent acting as the embedder window.

        XToolkit.awtLock();

        try {

            XlibWrapper.XUnmapWindow(XToolkit.getDisplay(), child);

            XlibWrapper.XReparentWindow(XToolkit.getDisplay(), child, XToolkit.getDefaultRootWindow(), 0, 0);

        }

        finally {

            XToolkit.awtUnlock();

        }

    }

    void focusGained(long child) {

        sendMessage(child, XEMBED_FOCUS_IN, XEMBED_FOCUS_CURRENT, 0, 0);

    }

    void focusLost(long child) {

        sendMessage(child, XEMBED_FOCUS_OUT);

    }

    XEmbedChildProxyPeer getChild(long child) {

        return (XEmbedChildProxyPeer)children.get(Long.valueOf(child));

    }

    public void handleClientMessage(XEvent xev) {

        XClientMessageEvent msg = xev.get_xclient();

        if (msg.get_message_type() == XEmbed.getAtom()) {

            switch ((int)msg.get_data(1)) {

              case XEMBED_REQUEST_FOCUS:

                  long child = msg.get_data(2); // Unspecified

                  getChild(child).requestXEmbedFocus();

                  break;

            }

        }

    }

    public void dispatchEvent(XEvent xev) {

        switch(xev.get_type()) {

          case XConstants.ClientMessage:

              handleClientMessage(xev);

              break;

        }

    }

    static Field bdata;

    byte[] getBData(KeyEvent e) {

        try {

            if (bdata == null) {

                bdata = SunToolkit.getField(java.awt.AWTEvent.class, "bdata");

            }

            return (byte[])bdata.get(e);

        } catch (IllegalAccessException ex) {

            return null;

        }

    }

    void forwardKeyEvent(long child, KeyEvent e) {

        byte[] bdata = getBData(e);

        long data = Native.toData(bdata);

        if (data == 0) {

            return;

        }

        XKeyEvent ke = new XKeyEvent(data);

        ke.set_window(child);

        XToolkit.awtLock();

        try {

            XlibWrapper.XSendEvent(XToolkit.getDisplay(), child, false, XConstants.NoEventMask, data);

        }

        finally {

            XToolkit.awtUnlock();

        }

        XlibWrapper.unsafe.freeMemory(data);

    }

}