/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.css2;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.eclipse.jst.jsf.common.ui.internal.logging.Logger;
import org.eclipse.jst.jsf.common.ui.internal.utils.ResourceUtils;
import org.eclipse.jst.pagedesigner.IJMTConstants;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.jst.pagedesigner.css2.font.CSSFont;
import org.eclipse.jst.pagedesigner.css2.style.DefaultStyle;
import org.eclipse.swt.graphics.Color;
import org.eclipse.wst.css.core.internal.provisional.adapters.IStyleSheetListAdapter;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSModel;
import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode;
import org.eclipse.wst.css.core.internal.util.CSSClassTraverser;
import org.eclipse.wst.html.core.internal.htmlcss.CSSQueryTraverser;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.provisional.INodeNotifier;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.css.CSSStyleDeclaration;
import org.w3c.dom.stylesheets.StyleSheet;
import org.w3c.dom.stylesheets.StyleSheetList;
/**
* @author mengbo
*/
public class CSSUtil {
private static StyleSheet _userAgentDefault;
/**
* @param doc
* @return the css classes
*/
public static String[] getCSSClasses(Document doc) {
Collection c = Collections.EMPTY_SET;
if (doc instanceof INodeNotifier) {
IStyleSheetListAdapter adapter = (IStyleSheetListAdapter) ((INodeNotifier) doc)
.getAdapterFor(IStyleSheetListAdapter.class);
StyleSheetList ssl = (adapter == null ? null : adapter
.getStyleSheets());
CSSClassTraverser traverser = new CSSClassTraverser();
if (ssl != null) {
for (int i = 0, numStyles = ssl.getLength(); i < numStyles; i++) {
// loop for styles (<style> and <link>)
org.w3c.dom.stylesheets.StyleSheet ss = ssl.item(i);
try {
traverser.apply((ICSSNode) ss);
} catch (ClassCastException ex) {
Logger log = PDPlugin
.getLogger(CSSStyleDeclaration.class);
log.error("Error.CSSUtil.0", ex); //$NON-NLS-1$
// FIXME: should this continue to be processed?
}
}
c = traverser.getClassNames();
}
}
String[] result = new String[c.size()];
c.toArray(result);
return result;
}
/**
* Get the css style of a node.
*
* @param node
* @return the style
*/
public static ICSSStyle getCSSStyle(Element node) {
ICSSStyle style = null;
if (node instanceof IDOMElement) {
style = (ICSSStyle) ((IDOMElement) node)
.getAdapterFor(ICSSStyle.class);
}
if (style == null) {
return DefaultStyle.getInstance();
}
return style;
}
/**
* Resolve the css style string from css style elements.
*
* @param style
* @return the style string
*/
public static String resolveCSSStyle(ICSSStyle style) {
StringBuffer sb = new StringBuffer();
Object object1 = style.getColor();
if (object1 instanceof Color) {
sb.append("color:"); //$NON-NLS-1$
sb.append("#").append( //$NON-NLS-1$
Integer.toHexString(((Color) object1).getRed()));
sb.append("#").append( //$NON-NLS-1$
Integer.toHexString(((Color) object1).getGreen()));
sb.append("#").append( //$NON-NLS-1$
Integer.toHexString(((Color) object1).getBlue()));
sb.append(";"); //$NON-NLS-1$
}
Object object2 = style.getCSSFont();
if (object2 instanceof CSSFont) {
sb.append(((CSSFont) object2).getCSSString());
}
return sb.toString();
}
/**
* Many of this method implementation copied from HTMLDocumentAdapter,
* mainly add support for user agent default style sheet.
*
* @param element
* the element.
* @param pseudoName
* the pseudoname of the element
* @return the style declaration
*/
public static CSSStyleDeclaration getCSSDeclaration(Element element,
String pseudoName) {
// please reference comments in CSSTempUtil.
List styleSheets = CSSTempUtil.getStyleSheets(element);
// INodeNotifier docnotifier = (INodeNotifier)
// element.getOwnerDocument();
// IStyleSheetListAdapter adapter = (IStyleSheetListAdapter)
// docnotifier.getAdapterFor(IStyleSheetListAdapter.class);
//
// StyleSheetList ssl = (adapter == null ? null :
// adapter.getStyleSheets());
CSSQueryTraverser query = new CSSQueryTraverser();
query.setTraverseImported(true);
query.setTraverseImportFirst(true);
query.setElement(element, pseudoName);
// if (ssl != null)
// {
// for (int i = 0, numStyles = ssl.getLength(); i < numStyles; i++)
// {
// // loop for styles (<style> and <link>)
// org.w3c.dom.stylesheets.StyleSheet ss = ssl.item(i);
if (styleSheets != null) {
for (int i = 0, numStyles = styleSheets.size(); i < numStyles; i++) {
StyleSheet ss = (StyleSheet) styleSheets.get(i);
try {
query.apply((ICSSNode) ss);
} catch (ClassCastException ex) {
Logger log = PDPlugin.getLogger(CSSStyleDeclaration.class);
log.error("Error.CSSUtil.0", ex); //$NON-NLS-1$
// FIXME: should this continue to be processed?
}
}
}
CSSStyleDeclaration declare = query.getDeclaration();
// FIXME: when do we need to apply the user agent style sheet?
return declare;
}
/**
* Many of this method implementation copied from HTMLDocumentAdapter,
* mainly add support for user agent default style sheet.
*
* @param element
* the element.
* @param pseudoName
* the pseudoname of the element
* @return the style declaration
*/
public static CSSStyleDeclaration getDefaultCSSDeclaration(Element element,
String pseudoName) {
CSSQueryTraverser query = new CSSQueryTraverser();
query.setTraverseImported(true);
query.setTraverseImportFirst(true);
query.setElement(element, pseudoName);
// FIXME: when do we need to apply the user agent style sheet?
try {
getUserAgentDefaultStyleSheet(element);
} catch (UnsupportedEncodingException e) {
Logger log = PDPlugin.getLogger(CSSStyleDeclaration.class);
log.error("Error.CSSUtil.1", e); //$NON-NLS-1$
} catch (IOException e) {
Logger log = PDPlugin.getLogger(CSSStyleDeclaration.class);
log.error("Error.CSSUtil.2", e); //$NON-NLS-1$
}
if (_userAgentDefault != null) {
try {
query.apply((ICSSNode) _userAgentDefault);
} catch (ClassCastException ex) {
Logger log = PDPlugin.getLogger(CSSStyleDeclaration.class);
log.error("Error.CSSUtil.3", ex); //$NON-NLS-1$
}
}
CSSStyleDeclaration declare = query.getDeclaration();
return declare;
}
/**
* Get the user agent default style sheet.
*
* @param element
* @return
* @throws IOException
* @throws UnsupportedEncodingException
*/
// XXX: in the future, we may get user agent default style sheet based on
// device type.
private static StyleSheet getUserAgentDefaultStyleSheet(Element element)
throws UnsupportedEncodingException, IOException {
if (_userAgentDefault == null) {
InputStream input = null;
try
{
input = CSSUtil.class
.getResourceAsStream(IJMTConstants.USERAGENT);
IStructuredModel model = StructuredModelManager.getModelManager()
.getModelForEdit(IJMTConstants.USERAGENT, input, null);
ICSSModel cssmodel = (ICSSModel) model;
_userAgentDefault = (StyleSheet) cssmodel.getDocument();
}
finally
{
ResourceUtils.ensureClosed(input);
}
}
return _userAgentDefault;
}
}