Bug 318944 CSSSWTEngineImpl leaks memory
CSSSWTEngineImpl stores too many element contexts. In a memory snapshot, the HashMap size was 15559. This is most probably a leak.
bundles/org.eclipse.e4.ui.css.swt/src/org/eclipse/e4/ui/css/swt/engine/CSSSWTEngineImpl.java
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyMaximizeVisibleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyMaximizedSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyMinimizeVisibleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyMinimizedSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyMruVisibleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyOuterKeylineSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyShadowVisibleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyShowCloseHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertySimpleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertySingleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyTabHeightHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyTabMarginOffsetHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyTabRendererSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyUnselectedCloseVisibleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyUnselectedImageVisibleSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyUnselectedTabsSWTHandler;
import org.eclipse.e4.ui.css.swt.properties.custom.CSSPropertyWebbyStyleHandler;
import org.eclipse.e4.ui.css.xml.properties.css2.CSSPropertyBackgroundXMLHandler;
import org.eclipse.e4.ui.css.xml.properties.css2.CSSPropertyFontXMLHandler;
import org.eclipse.e4.ui.css.xml.properties.css2.CSSPropertyTextXMLHandler;
import org.eclipse.swt.widgets.Display;
/**
 * CSS SWT Engine implementation which configure CSSEngineImpl to apply styles
 * to SWT widgets with static handler strategy.
 */
public class CSSSWTEngineImpl extends AbstractCSSSWTEngineImpl {
	public CSSSWTEngineImpl(Display display) {
		super(display);
	}
	public CSSSWTEngineImpl(Display display, boolean lazyApplyingStyles) {