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/JavaEditor.java
private IRegion fHoverRegion;
				private String fHoverInfo;
				private IInformationControlCreator fControlCreator;
				
				InformationProvider(IRegion hoverRegion, String hoverInfo, IInformationControlCreator controlCreator) {
					fHoverRegion= hoverRegion;
					fHoverInfo= hoverInfo;
					fControlCreator= controlCreator;
				}
				/*
				 * @see org.eclipse.jface.text.information.IInformationProvider#getSubject(org.eclipse.jface.text.ITextViewer, int)
				 */
				public IRegion getSubject(ITextViewer textViewer, int invocationOffset) {					
					return fHoverRegion;
				}
				/*
				 * @see org.eclipse.jface.text.information.IInformationProvider#getInformation(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
				 */
				public String getInformation(ITextViewer textViewer, IRegion subject) {
					return fHoverInfo;
				}
				/*
				 * @see org.eclipse.jface.text.information.IInformationProviderExtension2#getInformationPresenterControlCreator()
				 * @since 3.0