Bug 66923 [typing]Can delete word (Ctrl-Backspace) on read only file
When you open read-only java file, all editing functions are disabled except deleting with Ctrl-Backspace and Ctrl-Del, then it is imposible to save this file. On simple text file it works ok - it blocks all edditing functions (including Ctrl-Backspace). I am using build 200406111814
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
try {
			
			AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();
			if (asv != null) {
					
				String p= event.getProperty();		
				
				if (CLOSE_BRACKETS.equals(p)) {
					fBracketInserter.setCloseBracketsEnabled(getPreferenceStore().getBoolean(p));
					return;	
				}
				if (CLOSE_STRINGS.equals(p)) {
					fBracketInserter.setCloseStringsEnabled(getPreferenceStore().getBoolean(p));
					return;
				}
								
				if (SPACES_FOR_TABS.equals(p)) {
					if (isTabConversionEnabled())
						startTabConversion();
					else
						stopTabConversion();
					return;
				}
				
				if (PreferenceConstants.EDITOR_SMART_TAB.equals(p)) {
					if (getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_SMART_TAB)) {
						setActionActivationCode("IndentOnTab", '\t', -1, SWT.NONE); 
					} else {
						removeActionActivationCode("IndentOnTab");