Bug 144590 [Accessibility] BIRT custom controls should support active accessibility
Description: BIRT custom controls should support active accessibility. There are some custom controls in BIRT GUI. In Eclipse, when implementing a custom control you should also implement some or all of (as they apply to your control) org.eclipse.swt.accessibility.AccessibleListener, org.eclipse.swt.accessibility.AccessibleControlListener and org.eclipse.swt.accessibility.AccessibleTextListener. Also, the custom control can notify Active Accessibility of changes within the control using org.eclipse.swt.accessibility.Accessible methods such as setFocus(), selectionChanged(), textCaretMoved(), textChanged() and textSelectionChanged().
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
{
		private ISelection globalSelection;
		/**
		 * @param multiPageEditor
		 */
		public FormEditorSelectionProvider( FormEditor formEditor )
		{
			super( formEditor );
		}
		public ISelection getSelection( )
		{
			IEditorPart activeEditor = ( (FormEditor) getMultiPageEditor( ) )
					.getActivePageInstance( );
			
			if ( activeEditor != null )
			{
				ISelectionProvider selectionProvider = activeEditor.getSite( )
						.getSelectionProvider( );
				if ( selectionProvider != null )
					return selectionProvider.getSelection( );
			}
			return globalSelection;
		}
		/*
		 * (non-Javadoc) Method declared on <code> ISelectionProvider </code> .
		 */
		public void setSelection( ISelection selection )
		{
			IEditorPart activeEditor = ( (FormEditor) getMultiPageEditor( ) )
					.getActivePageInstance( );