| /******************************************************************************* |
| * 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 |
| *******************************************************************************/ |
| package org.eclipse.e4.ui.css.core.dom.properties.providers; |
| |
| import org.eclipse.e4.ui.css.core.dom.CSSStylableElement; |
| import org.eclipse.e4.ui.css.core.dom.properties.ICSSPropertyHandlerProvider; |
| import org.eclipse.e4.ui.css.core.engine.CSSEngine; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.css.CSSStyleDeclaration; |
| |
| /** |
| * Abstract CSS Property handler. |
| */ |
| public abstract class AbstractCSSPropertyHandlerProvider implements |
| ICSSPropertyHandlerProvider { |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.e4.ui.css.core.dom.properties.ICSSPropertyHandlerProvider#getDefaultCSSStyleDeclaration(org.eclipse.e4.ui.css.core.engine.CSSEngine, |
| * java.lang.Object, org.w3c.dom.css.CSSStyleDeclaration) |
| */ |
| public CSSStyleDeclaration getDefaultCSSStyleDeclaration(CSSEngine engine, |
| Object widget, CSSStyleDeclaration newStyle, String pseudoE) |
| throws Exception { |
| Element elt = engine.getElement(widget); |
| if (elt != null) { |
| if (elt instanceof CSSStylableElement) { |
| CSSStylableElement stylableElement = (CSSStylableElement) elt; |
| return getDefaultCSSStyleDeclaration(engine, stylableElement, |
| newStyle, pseudoE); |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Return the CSS property from the CSS <code>propertyName</code> of the |
| * <code>stylableElement</code>. |
| * |
| * @param engine |
| * @param stylableElement |
| * @param propertyName |
| * @return |
| */ |
| protected String getCSSPropertyStyle(CSSEngine engine, |
| CSSStylableElement stylableElement, String propertyName, |
| String pseudo) { |
| String propertyValue = engine.retrieveCSSProperty(stylableElement, |
| propertyName, pseudo); |
| StringBuffer style = null; |
| // if (propertyValue != null) { |
| if (style == null) |
| style = new StringBuffer(); |
| style.append(propertyName); |
| style.append(":"); |
| style.append(propertyValue); |
| style.append(";"); |
| // } |
| return (style == null ? null : style.toString()); |
| } |
| |
| /** |
| * Return the default CSS style declaration of the |
| * {@link CSSStylableElement} <code>stylableElement</code> before apply |
| * the <code>newStyle</code> {@link CSSStyleDeclaration}. |
| * |
| * @param engine |
| * @param stylableElement |
| * @param newStyle |
| * @return |
| * @throws Exception |
| */ |
| protected abstract CSSStyleDeclaration getDefaultCSSStyleDeclaration( |
| CSSEngine engine, CSSStylableElement stylableElement, |
| CSSStyleDeclaration newStyle, String pseudoE) throws Exception; |
| } |