| /******************************************************************************* |
| * Copyright (c) 2004 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.html.core.internal.htmlcss; |
| |
| |
| |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSSelector; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSSelectorList; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSStyleDeclaration; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSStyleRule; |
| import org.eclipse.wst.css.core.internal.util.AbstractCssTraverser; |
| import org.eclipse.wst.css.core.internal.util.CSSStyleDeclarationFactory; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.css.ElementCSSInlineStyle; |
| |
| /** |
| */ |
| public class CSSQueryTraverser extends AbstractCssTraverser { |
| |
| private Element element; |
| private String pseudoName; |
| private CSSQueryContext context = null; |
| ICSSStyleDeclaration decl = null; |
| |
| /** |
| */ |
| public ICSSStyleDeclaration getDeclaration() { |
| try { |
| ICSSStyleDeclaration inlineStyle = (ICSSStyleDeclaration) ((ElementCSSInlineStyle) element).getStyle(); |
| if (inlineStyle != null) { |
| if (context == null) { |
| context = new CSSQueryContext(); |
| } |
| context.overrideWithExpand(inlineStyle, 10000); |
| // style attribute's specificity is 100 (in CSS2 spec.) and |
| // our implement use 100 as base number (see CSSSelector.java) |
| } |
| } |
| catch (ClassCastException ex) { |
| // element is not ElementCSSInlineStyle ??? |
| } |
| if (context == null) |
| return null; |
| |
| if (decl == null) |
| decl = CSSStyleDeclarationFactory.getInstance().createStyleDeclaration(); |
| context.applyFull(decl); |
| return decl; |
| } |
| |
| /** |
| */ |
| private void overwriteDeclaration(ICSSStyleDeclaration d, int specificity) { |
| if (d == null) |
| return; |
| if (context == null) |
| context = new CSSQueryContext(); |
| context.overrideWithExpand(d, specificity); |
| } |
| |
| /** |
| */ |
| protected short postNode(ICSSNode node) { |
| return TRAV_CONT; |
| } |
| |
| /** |
| */ |
| protected short preNode(ICSSNode node) { |
| if (node instanceof ICSSStyleRule) { |
| // style rule |
| ICSSStyleRule style = (ICSSStyleRule) node; |
| ICSSSelectorList list = style.getSelectors(); |
| int nSelectors = list.getLength(); |
| int maxSpecificity = -1; |
| for (int iSelector = 0; iSelector < nSelectors; iSelector++) { |
| // Check each Selector Lists |
| ICSSSelector selector = list.getSelector(iSelector); |
| int specificity = selector.getSpecificity(); |
| if (maxSpecificity < specificity && selector.match(element, pseudoName)) { |
| maxSpecificity = specificity; |
| } |
| } |
| if (maxSpecificity >= 0) { |
| // apply this style to the element |
| overwriteDeclaration((ICSSStyleDeclaration) style.getStyle(), maxSpecificity); |
| } |
| return TRAV_PRUNE; |
| } |
| return TRAV_CONT; |
| } |
| |
| /** |
| */ |
| private void resetContext() { |
| context = null; |
| } |
| |
| /** |
| */ |
| public void setElement(Element element, String pseudoName) { |
| this.element = element; |
| this.pseudoName = pseudoName; |
| resetContext(); |
| } |
| } |