| /******************************************************************************* |
| * Copyright (c) 2008 Angelo Zerr and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation |
| * IBM Corporation |
| *******************************************************************************/ |
| package org.eclipse.e4.ui.css.swt.helpers; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| |
| import org.eclipse.e4.ui.css.core.dom.CSSStylableElement; |
| import org.eclipse.e4.ui.css.core.engine.CSSEngine; |
| import org.eclipse.e4.ui.css.swt.dom.SWTElement; |
| import org.eclipse.e4.ui.css.swt.dom.html.SWTHTMLElement; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Widget; |
| import org.w3c.dom.Element; |
| |
| /** |
| * SWT Helper to link w3c Element with SWT widget. |
| */ |
| public class SWTElementHelpers { |
| |
| public static final String SWT_ELEMENT_KEY = "org.eclipse.e4.ui.core.css.swt.dom.SWTElement.ELEMENT"; |
| public static final String SWT_NODELIST_KEY = "org.eclipse.e4.ui.core.css.swt.dom.SWTElement.NODELIST"; |
| |
| private static final Class[] ELEMENT_CONSTRUCTOR_PARAM = { Widget.class, |
| CSSEngine.class }; |
| |
| /** |
| * Return the w3c Element linked to the SWT widget. |
| * |
| * @param widget |
| * @return |
| */ |
| public static Element getElement(Widget widget, CSSEngine engine, |
| Class classElement) throws NoSuchMethodException, |
| InvocationTargetException, InstantiationException, |
| IllegalAccessException { |
| Constructor constructor = classElement |
| .getConstructor(ELEMENT_CONSTRUCTOR_PARAM); |
| Object[] o = { widget, engine }; |
| Element newElement = (Element) constructor.newInstance(o); |
| return newElement; |
| } |
| |
| /** |
| * Return the w3c Element linked to the SWT widget. |
| * |
| * @param widget |
| * @return |
| */ |
| public static Element getElement(Widget widget, CSSEngine engine) { |
| try { |
| return getElement(widget, engine, SWTElement.class); |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| |
| /** |
| * Return the w3c Element linked to the SWT widget. |
| * |
| * @param widget |
| * @return |
| */ |
| public static Element getHTMLElement(Widget widget, CSSEngine engine) { |
| try { |
| return getElement(widget, engine, SWTHTMLElement.class); |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| |
| /** |
| * Return the SWT Control which is wrapped to the object |
| * <code>element</code>. |
| * |
| * @param element |
| * @return |
| */ |
| public static Control getControl(Object element) { |
| if (element instanceof Control) { |
| return (Control) element; |
| } else { |
| if (element instanceof CSSStylableElement) { |
| CSSStylableElement elt = (CSSStylableElement) element; |
| Object widget = elt.getNativeWidget(); |
| if (widget instanceof Control) |
| return (Control) widget; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Return the SWT Widget which is wrapped to the object <code>element</code>. |
| * |
| * @param element |
| * @return |
| */ |
| public static Widget getWidget(Object element) { |
| if (element instanceof Widget) { |
| return (Widget) element; |
| } else { |
| if (element instanceof CSSStylableElement) { |
| CSSStylableElement elt = (CSSStylableElement) element; |
| Object widget = elt.getNativeWidget(); |
| if (widget instanceof Widget) |
| return (Widget) widget; |
| } |
| } |
| return null; |
| } |
| } |