pluginappletwindow.java

gcj java applet的web browser 插件

/* PluginAppletWindow.java -- an embeddable applet window
   Copyright (C) 2003, 2004  Thomas Fitzsimmons <[e-mail]>

   This file is part of GCJ Applet Viewer.

   GCJ Applet Viewer 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.

   GCJ Applet Viewer 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 GCJ Applet Viewer; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

package gnu.gcjwebplugin;

import gnu.java.awt.EmbeddedWindow;
import java.applet.Applet;
import java.applet.AppletContext;
import java.awt.AWTEvent;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;


class PluginAppletWindow extends EmbeddedWindow
{
  private static HashMap contexts = new HashMap();
  private Applet applet;
  private AppletTag tag;
  private AppletWarning warning;
  private boolean isActive;

  PluginAppletWindow()
  {
    super();
  }

  void setTag(String tag, String documentbase, String encoding)
    throws MalformedURLException, IOException
  {
    StringReader reader = new StringReader(tag);
    URL documentbaseURL = AppletTag.locationToURL(documentbase);
    this.tag =
      AppletTag.parseNextTag(new StreamTokenizer(reader), documentbaseURL,
                             encoding);
  }

  ///////////////////////////////////
  ////// EmbeddedWindow Method //////
  ///////////////////////////////////

  /**
   * Set the native handle of the window system to embed the window in.
   *
   * @param handle the native handle.
   */
  public void setHandle(long handle)
  {
    super.setHandle(handle);
    addNotify();
    setLayout(new BorderLayout());

    applet = AppletViewer.createApplet(tag);

    if (contexts.get(tag.codebase) == null)
      contexts.put(tag.codebase, new PluginAppletContext());

    isActive = true;
    add(applet, BorderLayout.CENTER);

    AppletContext context = (AppletContext) contexts.get(tag.codebase);
    ((PluginAppletContext) context).addApplet(applet);

    applet.setStub(new CommonAppletStub(tag, context, applet));

    Dimension size = AppletTag.getSize (tag);
    setSize (size.width, size.height);
    applet.setSize (size);

    // Initialize the applet before showing this window so that
    // the applet doesn't receive events before it has been
    // initialized.
    applet.init ();
    setVisible (true);
    applet.validate();
    applet.start();
  }

  /////////////////////////////
  ////// Component Method /////
  /////////////////////////////

  /**
   * Prompts the layout manager to lay out this component. This is usually
   * called when the component (more specifically, container) is validated.
   *
   * (description copied from java.awt.Component.doLayout())
   */
  public void doLayout()
  {
    super.doLayout();

    // Assume the applet to be our only child and give it all the
    // space we have.
    Component c = this.getComponent(0);
    if (c != null)
      {
	Dimension cs = getSize();
	c.setBounds(0, 0, cs.width, cs.height);
      }
  }
}