126 lines
3.6 KiB
Java
126 lines
3.6 KiB
Java
import drafts.com.sun.star.accessibility.*;
|
|
import com.sun.star.lang.EventObject;
|
|
|
|
import java.util.LinkedList;
|
|
|
|
/** The event queue singleton dispatches events received from OpenOffice.org
|
|
applications in a thread separate from the AWB main thread.
|
|
|
|
The queue of event objects, LinkedList<Runnable> The queue object will
|
|
also serve as lock for the consumer/producer type syncronization.
|
|
*/
|
|
class EventQueue
|
|
implements Runnable
|
|
{
|
|
public boolean mbVerbose = false;
|
|
public boolean mbHandleDisposingEventsSynchronous = true;
|
|
|
|
public synchronized static EventQueue Instance ()
|
|
{
|
|
if (maInstance == null)
|
|
maInstance = new EventQueue ();
|
|
return maInstance;
|
|
}
|
|
|
|
public void addEvent (Runnable aEvent)
|
|
{
|
|
synchronized (maMonitor)
|
|
{
|
|
if (mbVerbose)
|
|
System.out.println ("queing regular event " + aEvent);
|
|
maRegularQueue.addLast (aEvent);
|
|
maMonitor.notify ();
|
|
}
|
|
}
|
|
|
|
|
|
public void addDisposingEvent (Runnable aEvent)
|
|
{
|
|
if (mbHandleDisposingEventsSynchronous)
|
|
aEvent.run ();
|
|
else
|
|
synchronized (maMonitor)
|
|
{
|
|
if (mbVerbose)
|
|
System.out.println ("queing disposing event " + aEvent);
|
|
maDisposingQueue.addLast (aEvent);
|
|
maMonitor.notify ();
|
|
}
|
|
}
|
|
|
|
|
|
private EventQueue ()
|
|
{
|
|
maMonitor = new Boolean (true);
|
|
maRegularQueue = new LinkedList();
|
|
maDisposingQueue = new LinkedList();
|
|
new Thread(this, "AWB.EventQueue").start();
|
|
}
|
|
|
|
|
|
/// This thread's main method: deliver all events
|
|
public void run()
|
|
{
|
|
// in an infinite loop, check for events to deliver, then
|
|
// wait on lock (which will be notified when new events arrive)
|
|
while( true )
|
|
{
|
|
Runnable aEvent = null;
|
|
do
|
|
{
|
|
synchronized (maMonitor)
|
|
{
|
|
if (maDisposingQueue.size() > 0)
|
|
{
|
|
aEvent = (Runnable)maDisposingQueue.removeFirst();
|
|
if (mbVerbose)
|
|
System.out.println ("delivering disposing event " + aEvent);
|
|
}
|
|
else if (maRegularQueue.size() > 0)
|
|
{
|
|
aEvent = (Runnable)maRegularQueue.removeFirst();
|
|
if (mbVerbose)
|
|
System.out.println ("delivering regular event " + aEvent);
|
|
}
|
|
else
|
|
aEvent = null;
|
|
}
|
|
if (aEvent != null)
|
|
{
|
|
try
|
|
{
|
|
aEvent.run();
|
|
}
|
|
catch( Throwable e )
|
|
{
|
|
System.out.println(
|
|
"caught exception during event delivery: " + e );
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
while( aEvent != null );
|
|
|
|
try
|
|
{
|
|
synchronized (maMonitor)
|
|
{
|
|
maMonitor.wait();
|
|
}
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
// can't wait? odd!
|
|
System.err.println("Can't wait!");
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
|
|
private static EventQueue maInstance = null;
|
|
private Object maMonitor;
|
|
private LinkedList maRegularQueue;
|
|
private LinkedList maDisposingQueue;
|
|
}
|
|
|
|
|