Bug 132798 [Field Assist] - Pressing Backspace at offset 0 should not reload field assist popup
N20060322-0010. After migrating the Find/Replace dialog to the new field assist support I found the following blooper: pressing the Backspace key at offset 0 reloads the field assist popup. Test Case: 1. in a text editor press Ctrl+F 2. enable regex search 3. in the Find filed press Ctrl+Space 4. continuously press Backspace ==> each time the proposal list is reloaded.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
proposalTable.addListener(SWT.FocusOut, this);
				ScrollBar scrollbar = proposalTable.getVerticalBar();
				if (scrollbar != null) {
					scrollbar.addListener(SWT.Selection, this);
				}
				
				getShell().addListener(SWT.Deactivate, this);
				getShell().addListener(SWT.Close, this);
				
				control.addListener(SWT.MouseDoubleClick, this);
				control.addListener(SWT.MouseDown, this);
				control.addListener(SWT.Dispose, this);
				control.addListener(SWT.FocusOut, this);
				
				Shell controlShell = control.getShell();
				controlShell.addListener(SWT.Move, this);
				controlShell.addListener(SWT.Resize, this);
			}
			
			void removeListeners() {
				if (isValid()) {
					proposalTable.removeListener(SWT.FocusOut, this);
					ScrollBar scrollbar = proposalTable.getVerticalBar();
					if (scrollbar != null) {
						scrollbar.removeListener(SWT.Selection, this);
					}
					getShell().removeListener(SWT.Deactivate, this);
					getShell().removeListener(SWT.Close, this);
				}