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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.css.engine.enginecopy;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.e4.ui.css.core.dom.CSSStylableElement;
import org.eclipse.e4.ui.css.core.dom.ExtendedCSSRule;
import org.eclipse.e4.ui.css.core.impl.dom.ViewCSSImpl;
import org.eclipse.e4.ui.css.core.impl.sac.ExtendedSelector;
import org.eclipse.papyrus.infra.gmfdiag.css.engine.ExtendedCSSEngine;
import org.eclipse.papyrus.infra.gmfdiag.css.lists.ExtendedStyleSheetList;
import org.w3c.css.sac.Selector;
import org.w3c.css.sac.SelectorList;
import org.w3c.dom.Element;
import org.w3c.dom.css.CSSRule;
import org.w3c.dom.css.CSSRuleList;
import org.w3c.dom.css.CSSStyleDeclaration;
import org.w3c.dom.css.CSSStyleRule;
import org.w3c.dom.css.CSSStyleSheet;
import org.w3c.dom.css.ViewCSS;
import org.w3c.dom.stylesheets.StyleSheet;
import org.w3c.dom.views.DocumentView;
@SuppressWarnings("restriction")
public class ExtendedViewCSSImpl implements ViewCSS {
protected ExtendedCSSEngine engine;
public ExtendedViewCSSImpl(ExtendedCSSEngine extendedCSSEngine) {
this.engine = extendedCSSEngine;
}
/**
* {@inheritDoc}
*
* Implementation based on {@link ViewCSSImpl#getComputedStyle(Element, String)} The base implementations returns the first CSSStyleDeclaration.
*
* When a StyleDeclaration is found in a StyleSheet, it is added to a list of declarations.
* Then, these declarations are merged
*/
public CSSStyleDeclaration getComputedStyle(Element elt, String pseudo) {
ExtendedStyleSheetList styleSheetList = engine.getAllStylesheets();
List<StyleWrapper> declarations = new ArrayList<StyleWrapper>();
//Stylesheets
for(StyleSheet styleSheet : styleSheetList) {
List<StyleWrapper> styleWrappers = getStyleWrappers((CSSStyleSheet)styleSheet, elt, pseudo);
declarations.addAll(styleWrappers);
}
//Local styles
String localStyles = ((CSSStylableElement)elt).getCSSStyle();
if(localStyles != null) {
StyleWrapper wrapper = getStyleWrapper(localStyles);
if(wrapper != null) {
declarations.add(wrapper);
}
}
return new CSSComputedStyleImpl(declarations);
}
private StyleWrapper getStyleWrapper(String localStyles) {
CSSStyleDeclaration style;
try {
style = engine.parseStyleDeclaration(localStyles);
StyleWrapper wrapper = new StyleWrapper(style, Integer.MAX_VALUE, 0);
return wrapper;
} catch (IOException ex) {
engine.handleExceptions(ex);
}
return null;
}
/**
* Implementation based on {@link ViewCSSImpl#getComputedStyle(CSSStyleSheet, Element, String)}
*
* Returns the StyleWrappers instead of a StyleDeclaration
*/
private List<StyleWrapper> getStyleWrappers(CSSStyleSheet styleSheet, Element elt, String pseudoElt) {
List<StyleWrapper> styleDeclarations = new ArrayList<StyleWrapper>();
CSSRuleList ruleList = styleSheet.getCssRules();
int length = ruleList.getLength();
int position = 0;
for(int i = 0; i < length; i++) {
CSSRule rule = ruleList.item(i);
switch(rule.getType()) {
case CSSRule.STYLE_RULE:
{
CSSStyleRule styleRule = (CSSStyleRule)rule;
if(rule instanceof ExtendedCSSRule) {
ExtendedCSSRule r = (ExtendedCSSRule)rule;
SelectorList selectorList = r.getSelectorList();
// Loop for SelectorList
int l = selectorList.getLength();
for(int j = 0; j < l; j++) {
Selector selector = selectorList.item(j);
if(selector instanceof ExtendedSelector) {
ExtendedSelector extendedSelector = (ExtendedSelector)selector;
if(extendedSelector.match(elt, pseudoElt)) {
CSSStyleDeclaration style = styleRule.getStyle();
int specificity = extendedSelector.getSpecificity();
StyleWrapper wrapper = new StyleWrapper(style, specificity, position++);
styleDeclarations.add(wrapper);
}
} else {
// TODO : selector is not batik ExtendedSelector,
// Manage this case...
}
}
} else {
// TODO : CSS rule is not ExtendedCSSRule,
// Manage this case...
}
}
}
}
return styleDeclarations;
}
/**
* {@inheritDoc}
*
* Unsupported
* TODO : Do we need an implementation ?
*/
public DocumentView getDocument() {
return null;
}
}
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