AOO410/main/accessibility/bridge/org/openoffice/accessibility/KeyHandler.java

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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
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package org.openoffice.accessibility;

import com.sun.star.uno.UnoRuntime;
import com.sun.star.awt.XKeyHandler;
import org.openoffice.java.accessibility.AccessibleKeyBinding;
import org.openoffice.java.accessibility.Build;

import java.awt.*;
import java.awt.event.KeyEvent;
import javax.accessibility.*;

public class KeyHandler extends Component implements XKeyHandler, java.awt.KeyEventDispatcher {
    EventQueue eventQueue;
    
    public class VCLKeyEvent extends KeyEvent implements Runnable {
        boolean consumed = true;

        public VCLKeyEvent(Component c, int id, int modifiers, int keyCode, char keyChar) {
            super(c, id, System.currentTimeMillis(), modifiers, keyCode, keyChar);
        }

        public void run() {
            // This is a no-op ..
        }

        public void setConsumed(boolean b) {
            consumed = b;
        }

        public boolean isConsumed() {
            return consumed;
        }
    }
    
    public KeyHandler() {
        eventQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
        java.awt.KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(this);
    }
    
    /** This method is called by the current KeyboardFocusManager requesting that this KeyEventDispatcher 
    * dispatch the specified event on its behalf
    */
    public boolean dispatchKeyEvent(java.awt.event.KeyEvent e) {
        if (e instanceof VCLKeyEvent) {
            VCLKeyEvent event = (VCLKeyEvent) e;
            event.setConsumed(false);
            return true;
        } 
        return false;
    }
        
    /** Handler for KeyPressed events */
    public boolean keyPressed(com.sun.star.awt.KeyEvent event) {
//      try {
            VCLKeyEvent vke = new VCLKeyEvent(this, KeyEvent.KEY_PRESSED, 
                AccessibleKeyBinding.convertModifiers(event.Modifiers), 
                AccessibleKeyBinding.convertKeyCode(event.KeyCode),
                event.KeyChar != 0 ? event.KeyChar : KeyEvent.CHAR_UNDEFINED);
            
            eventQueue.postEvent(vke);
            
            // VCL events for TABs have empty KeyChar 
            if (event.KeyCode == com.sun.star.awt.Key.TAB ) {
			    event.KeyChar = '\t';
            }

            // Synthesize KEY_TYPED event to emulate Java behavior
            if (event.KeyChar != 0) {
                eventQueue.postEvent(new VCLKeyEvent(this, 
                    KeyEvent.KEY_TYPED, 
                    AccessibleKeyBinding.convertModifiers(event.Modifiers), 
                    KeyEvent.VK_UNDEFINED, 
                    event.KeyChar));
            }
            
            // Wait until the key event is processed
            return false;
//          eventQueue.invokeAndWait(vke);
//          return vke.isConsumed();
//      } catch(java.lang.InterruptedException e) {
//          return false;
//      } catch(java.lang.reflect.InvocationTargetException e) {
//          return false;
//      }
    }
    
    /** Handler for KeyReleased events */
    public boolean keyReleased(com.sun.star.awt.KeyEvent event) {
//      try {
            VCLKeyEvent vke = new VCLKeyEvent(this, KeyEvent.KEY_RELEASED, 
                AccessibleKeyBinding.convertModifiers(event.Modifiers),
                AccessibleKeyBinding.convertKeyCode(event.KeyCode), 
                event.KeyChar != 0 ? event.KeyChar : KeyEvent.CHAR_UNDEFINED);
            eventQueue.postEvent(vke);
            
            // Wait until the key event is processed
            return false;
//          eventQueue.invokeAndWait(vke);
//          return vke.isConsumed();
//      } catch(java.lang.InterruptedException e) {
//          return false;
//      } catch(java.lang.reflect.InvocationTargetException e) {
//          return false;
//      }
    }
    
    public void disposing(com.sun.star.lang.EventObject event) {
        java.awt.KeyboardFocusManager.getCurrentKeyboardFocusManager().removeKeyEventDispatcher(this);
    }
}