Bug 54094 Assertion failed in auto indent strategy
(in HEAD) The snippet editor subclasses the JavaSourceViewerConfiguration, and inherits its autoindent strategy. This is causing the following exception, when I attempt to enter a carriage return at the end of a snippet editor. For example, my editor cantained the following text. Placing the cursor at the end and pressing 'Enter' results in the stack trace. Should we not use the indent strategy? or can JUI allow us to continue using it? java.util.Vector v = null; v.add("Sam"); for (int i = 0; i < 100; i++) { } v.toString() org.eclipse.jface.text.Assert$AssertionFailedException: Assertion failed: at org.eclipse.jface.text.Assert.isTrue(Assert.java:175) at org.eclipse.jface.text.Assert.isTrue(Assert.java:160) at org.eclipse.jdt.internal.ui.text.JavaHeuristicScanner.scanForward (JavaHeuristicScanner.java:638) at org.eclipse.jdt.internal.ui.text.JavaHeuristicScanner.findNonWhitespaceForwardI nAnyPartition(JavaHeuristicScanner.java:607) at org.eclipse.jdt.internal.ui.text.JavaIndenter.skipToPreviousListItemOrListStart (JavaIndenter.java:759) at org.eclipse.jdt.internal.ui.text.JavaIndenter.findReferencePosition (JavaIndenter.java:559) at org.eclipse.jdt.internal.ui.text.JavaIndenter.findReferencePosition (JavaIndenter.java:405) at org.eclipse.jdt.internal.ui.text.JavaIndenter.getReferenceIndentation (JavaIndenter.java:105) at org.eclipse.jdt.internal.ui.text.JavaIndenter.computeIndentation (JavaIndenter.java:138) at org.eclipse.jdt.internal.ui.text.JavaIndenter.computeIndentation (JavaIndenter.java:124) at org.eclipse.jdt.internal.ui.text.java.JavaAutoIndentStrategy.smartIndentAfterNe wLine(JavaAutoIndentStrategy.java:261) at org.eclipse.jdt.internal.ui.text.java.JavaAutoIndentStrategy.customizeDocumentC ommand(JavaAutoIndentStrategy.java:996) at org.eclipse.jface.text.TextViewer.customizeDocumentCommand (TextViewer.java:3132) at org.eclipse.jface.text.TextViewer.handleVerifyEvent (TextViewer.java:3160) at org.eclipse.jface.text.TextViewer$TextVerifyListener.verifyText (TextViewer.java:322) at org.eclipse.swt.widgets.TypedListener.handleEvent (TypedListener.java:193) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:833) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:857) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:842) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:650) at org.eclipse.swt.custom.StyledText.modifyContent (StyledText.java:5951) at org.eclipse.swt.custom.StyledText.sendKeyEvent(StyledText.java:6935) at org.eclipse.swt.custom.StyledText.doContent(StyledText.java:2557) at org.eclipse.swt.custom.StyledText.handleKey(StyledText.java:5304) at org.eclipse.swt.custom.StyledText.handleKeyDown (StyledText.java:5327) at org.eclipse.swt.custom.StyledText$7.handleEvent (StyledText.java:5070) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:833) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:857) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:842) at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1716) at org.eclipse.swt.widgets.Control.sendKeyEvent(Control.java:1712) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:3037) at org.eclipse.swt.widgets.Control.windowProc(Control.java:2940) at org.eclipse.swt.widgets.Display.windowProc(Display.java:2880) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1376) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2031) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1509) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1480) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench (Workbench.java:257) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:139) at org.eclipse.ui.internal.ide.IDEApplication.run (IDEApplication.java:48) at org.eclipse.core.internal.runtime.PlatformActivator$1.run (PlatformActivator.java:260) at org.eclipse.core.runtime.adaptor.EclipseStarter.run (EclipseStarter.java:173) at org.eclipse.core.runtime.adaptor.EclipseStarter.run (EclipseStarter.java:106) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.eclipse.core.launcher.Main.basicRun(Main.java:305) at org.eclipse.core.launcher.Main.run(Main.java:745) at org.eclipse.core.launcher.Main.main(Main.java:713)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaIndenter.java
if (fIndent < 0)
			unindent(indent);
		
		return indent;
	}
	/**
	 * Returns the indentation of the line at <code>offset</code> as a
	 * <code>StringBuffer</code>. If the offset is not valid, the empty string
	 * is returned.
	 * 
	 * @param offset the offset in the document
	 * @return the indentation (leading whitespace) of the line in which
	 * 		   <code>offset</code> is located
	 */
	private StringBuffer getLeadingWhitespace(int offset) {
		StringBuffer indent= new StringBuffer();
		try {
			IRegion line= fDocument.getLineInformationOfOffset(offset);
			int lineOffset= line.getOffset();
			int nonWS= fScanner.findNonWhitespaceForwardInAnyPartition(lineOffset, lineOffset + line.getLength());
			indent.append(fDocument.get(lineOffset, nonWS - lineOffset));
			return indent;
		} catch (BadLocationException e) {
			return indent;
		}
	}
	/**
	 * Reduces indentation in <code>indent</code> by one indentation unit.
	 * 
	 * @param indent the indentation to be modified