### Eclipse Workspace Patch 1.0
#P org.eclipse.jface.text
Index: src/org/eclipse/jface/text/WhitespaceCharacterPainter.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jface.text/src/org/eclipse/jface/text/WhitespaceCharacterPainter.java,v
retrieving revision 1.8
diff -u -r1.8 WhitespaceCharacterPainter.java
--- src/org/eclipse/jface/text/WhitespaceCharacterPainter.java	11 Sep 2007 09:00:31 -0000	1.8
+++ src/org/eclipse/jface/text/WhitespaceCharacterPainter.java	24 Oct 2007 12:36:05 -0000
@@ -162,6 +162,7 @@
 	 * @param w  the width of the drawing range
 	 */
 	private void drawLineRange(GC gc, int startLine, int endLine, int x, int w) {
+		final int viewPortWidth= fTextWidget.getClientArea().width;
 		for (int line= startLine; line <= endLine; line++) {
 			int lineOffset= fTextWidget.getOffsetAtLine(line);
 			// line end offset including line delimiter
@@ -182,7 +183,7 @@
 			}
 			// compute coordinates of last character on line
 			Point endOfLine= fTextWidget.getLocationAtOffset(lineOffset + lineLength);
-			if (x > endOfLine.x) {
+			if (x - endOfLine.x > viewPortWidth) {
 				// line is not visible
 				continue;
 			}
@@ -191,7 +192,10 @@
 			// compute first visible char offset
 			int startOffset;
 			try {
-				startOffset= fTextWidget.getOffsetAtLocation(new Point(x, y));
+				startOffset= fTextWidget.getOffsetAtLocation(new Point(x, y)) - 1;
+				if (startOffset - 2 <= lineOffset) {
+					startOffset= lineOffset;
+				}
 			} catch (IllegalArgumentException iae) {
 				startOffset= lineOffset;
 			}