bug 26830

1 files changed, 112 insertions, 0 deletions

diff --git a/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/console/ConsoleLineNotifier.java b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/console/ConsoleLineNotifier.java
new file mode 100644
index 000000000..99a547c9d
--- /dev/null
+++ b/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/views/console/ConsoleLineNotifier.java
@@ -0,0 +1,112 @@
+package org.eclipse.debug.internal.ui.views.console;
+
+/**********************************************************************
+Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
+This file is made available under the terms of the Common Public License v1.0
+which accompanies this distribution, and is available at
+http://www.eclipse.org/legal/cpl-v10.html
+**********************************************************************/
+
+import org.eclipse.debug.internal.ui.DebugUIPlugin;
+import org.eclipse.debug.ui.console.IConsole;
+import org.eclipse.debug.ui.console.IConsoleLineTracker;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.DocumentEvent;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.util.ListenerList;
+
+/**
+ * Tracks text appended to the console and notifies listeners in terms of whole
+ * lines.
+ */
+public class ConsoleLineNotifier {
+	
+	/**
+	 * Number of lines processed in the console
+	 */
+	private int fLinesProcessed = 0;
+	
+	/**
+	 * Console listeners
+	 */
+	private ListenerList fListeners = new ListenerList(2);
+
+	/**
+	 * The console this notifier is tracking 
+	 */
+	private IConsole fConsole = null;
+	
+	/**
+	 * Connects this notifier to the given console.
+	 *  
+	 * @param console
+	 */
+	public void connect(IConsole console) {
+		fConsole = console;
+		Object[] listeners = fListeners.getListeners();
+		for (int i = 0; i < listeners.length; i++) {
+			IConsoleLineTracker listener = (IConsoleLineTracker)listeners[i];
+			listener.init(console);
+		}
+	}
+	
+	/**
+	 * Disposes this notifier 
+	 */
+	public void disconnect() {
+		Object[] listeners = fListeners.getListeners();
+		for (int i = 0; i < listeners.length; i++) {
+			IConsoleLineTracker listener = (IConsoleLineTracker)listeners[i];
+			listener.dispose();
+		}
+		fListeners = null;
+		fConsole = null;
+	}
+	
+	/**
+	 * Notification the console has changed based on the given event
+	 */
+	public void consoleChanged(DocumentEvent event) {
+		IDocument document = event.getDocument();
+		int lines = document.getNumberOfLines();
+		Object[] listeners = fListeners.getListeners();
+		for (int line = fLinesProcessed; line < lines; line++) {
+			String delimiter = null;
+			try {
+				delimiter = document.getLineDelimiter(line);
+			} catch (BadLocationException e) {
+				DebugUIPlugin.log(e);
+				return;
+			}
+			if (delimiter == null) {
+				// line not complete yet
+				return;
+			}
+			fLinesProcessed++;
+			IRegion lineRegion = null;
+			try {
+				lineRegion = document.getLineInformation(line);
+			} catch (BadLocationException e) {
+				DebugUIPlugin.log(e);
+				return;
+			}
+			for (int i = 0; i < listeners.length; i++) {
+				IConsoleLineTracker listener = (IConsoleLineTracker)listeners[i];
+				listener.lineAppended(lineRegion);
+			}
+		}
+		// TODO: what about the last line?
+	}
+	
+	/**
+	 * Adds the given listener to the list of listeners notified when a line of
+	 * text is appended to the console.
+	 * 
+	 * @param listener
+	 */
+	public void addConsoleListener(IConsoleLineTracker listener) {
+		fListeners.add(listener);
+	}
+
+}