Revert "SwingConsolePane: first cut at batching the output"

This reverts commit 881065a.

Batching the output does not provide great performance gains, and it
causes problems with the reliability of output delivery. But we'll
leave the work in place in the history: a) so the history documents
why things are the way they are; and b) in case anyone wants to make
a more nuanced attempt at batching output in the future.

Author: ctrueden

src/main/java/org/scijava/ui/swing/console/SwingConsolePane.java

@@ -35,7 +35,6 @@
 import java.awt.Component;
 import java.awt.Dimension;
 import java.awt.Font;
-import java.util.concurrent.ConcurrentLinkedQueue;
 
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
@@ -82,13 +81,6 @@ public class SwingConsolePane extends AbstractConsolePane<JPanel> {
 	 */
 	private Component window;
 
-	/** Output queue, to avoid excessive queuing to the EDT. */
-	private ConcurrentLinkedQueue<OutputEvent> outputQueue =
-		new ConcurrentLinkedQueue<OutputEvent>();
-
-	/** Flag indicating that the EDT is currently flushing the output. */
-	private boolean outputFlushing;
-
 	public SwingConsolePane(final Context context) {
 		super(context);
 	}
@@ -115,29 +107,19 @@ public JScrollPane getScrollPane() {
 	@Override
 	public void append(final OutputEvent event) {
 		if (consolePanel == null) initConsolePanel();
-		outputQueue.add(event);
-		if (outputFlushing) return;
-		outputFlushing = true;
-
 		threadService.queue(new Runnable() {
 
 			@Override
 			public void run() {
-				while (true) {
-					outputFlushing = !outputQueue.isEmpty();
-					final OutputEvent item = outputQueue.poll();
-					if (item == null) break;
-
-					final boolean atBottom =
-						StaticSwingUtils.isScrolledToBottom(scrollPane);
-					try {
-						doc.insertString(doc.getLength(), item.getOutput(), getStyle(item));
-					}
-					catch (final BadLocationException exc) {
-						throw new RuntimeException(exc);
-					}
-					if (atBottom) StaticSwingUtils.scrollToBottom(scrollPane);
+				final boolean atBottom =
+					StaticSwingUtils.isScrolledToBottom(scrollPane);
+				try {
+					doc.insertString(doc.getLength(), event.getOutput(), getStyle(event));
+				}
+				catch (final BadLocationException exc) {
+					throw new RuntimeException(exc);
 				}
+				if (atBottom) StaticSwingUtils.scrollToBottom(scrollPane);
 			}
 		});
 	}