/*******************************************************************************
* Copyright (c) 2004, 2010 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.text;
import java.util.Locale;
import org.eclipse.jface.text.IDocumentPartitioner;
import org.eclipse.wst.css.core.text.ICSSPartitions;
import org.eclipse.wst.html.core.internal.provisional.HTML40Namespace;
import org.eclipse.wst.html.core.text.IHTMLPartitions;
import org.eclipse.wst.sse.core.internal.parser.ForeignRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredTextPartitioner;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionList;
import org.eclipse.wst.sse.core.internal.text.IRegionComparible;
import org.eclipse.wst.sse.core.internal.text.rules.IStructuredTypedRegion;
import org.eclipse.wst.sse.core.internal.util.ScriptLanguageKeys;
import org.eclipse.wst.sse.core.utils.StringUtils;
import org.eclipse.wst.xml.core.internal.regions.DOMRegionContext;
import org.eclipse.wst.xml.core.internal.text.rules.StructuredTextPartitionerForXML;
/**
* Document partitioner for HTML. Client-side scripts of type JavaScript are
* reported as ST_SCRIPT, all others for <script language="foo" type="foo2">
* as SCRIPT.language:FOO and SCRIPT.type:FOO2.
*/
public class StructuredTextPartitionerForHTML extends StructuredTextPartitionerForXML implements IStructuredTextPartitioner {
private final static String[] configuredContentTypes = new String[]{IHTMLPartitions.HTML_DEFAULT, IHTMLPartitions.HTML_DECLARATION, IHTMLPartitions.HTML_COMMENT, IHTMLPartitions.SCRIPT, ICSSPartitions.STYLE,IHTMLPartitions.SCRIPT_EVENTHANDLER};
public static final String JAVASCRIPT = "javascript"; //$NON-NLS-1$
public static final String JAVASCRIPT_APPLICATION = "application/x-javascript"; //$NON-NLS-1$
private static final String[] EVENT_ATTRIBUTE_NAMES =
{HTML40Namespace.ATTR_NAME_ONCLICK,
HTML40Namespace.ATTR_NAME_ONDBLCLICK,
HTML40Namespace.ATTR_NAME_ONMOUSEDOWN,
HTML40Namespace.ATTR_NAME_ONMOUSEUP,
HTML40Namespace.ATTR_NAME_ONMOUSEOVER,
HTML40Namespace.ATTR_NAME_ONMOUSEMOVE,
HTML40Namespace.ATTR_NAME_ONMOUSEOUT,
HTML40Namespace.ATTR_NAME_ONKEYPRESS,
HTML40Namespace.ATTR_NAME_ONKEYDOWN,
HTML40Namespace.ATTR_NAME_ONKEYUP,
HTML40Namespace.ATTR_NAME_ONHELP,
HTML40Namespace.ATTR_NAME_ONBLUR,
HTML40Namespace.ATTR_NAME_ONFOCUS,
HTML40Namespace.ATTR_NAME_ONLOAD,
HTML40Namespace.ATTR_NAME_ONUNLOAD,
HTML40Namespace.ATTR_NAME_ONSUBMIT};
/** array of style attribute names */
private static final String[] STYLE_ATTRIBUTE_NAMES = {HTML40Namespace.ATTR_NAME_STYLE};
public StructuredTextPartitionerForHTML() {
super();
}
public IStructuredTypedRegion createPartition(int offset, int length, String type) {
if (type == IHTMLPartitions.SCRIPT) {
IStructuredDocumentRegion node = fStructuredDocument.getRegionAtCharacterOffset(offset);
if (node != null) {
String stype = getScriptingPartitionType(node);
return super.createPartition(offset, length, stype);
}
}
return super.createPartition(offset, length, type);
}
protected void setInternalPartition(int offset, int length, String type) {
String localType = type;
if (type == IHTMLPartitions.SCRIPT) {
IStructuredDocumentRegion node = fStructuredDocument.getRegionAtCharacterOffset(offset);
if (node != null) {
localType = getScriptingPartitionType(node);
}
}
super.setInternalPartition(offset, length, localType);
}
private String getScriptingPartitionType(IStructuredDocumentRegion coreNode) {
String language = null;
String type = null;
String result = IHTMLPartitions.SCRIPT;
IStructuredDocumentRegion node = coreNode;
ITextRegion attrNameRegion = null;
while (node != null && isValidScriptingRegionType(node.getType())) {
node = node.getPrevious();
}
ITextRegionList regions = node.getRegions();
if (regions.size() > 4 && regions.get(1).getType() == DOMRegionContext.XML_TAG_NAME) {
ITextRegion potentialLanguageRegion = regions.get(1);
String potentialLanguageString = node.getText(potentialLanguageRegion);
if (potentialLanguageString.equalsIgnoreCase(HTML40Namespace.ElementName.SCRIPT)) {
for (int i = 0; i < regions.size(); i++) {
ITextRegion region = regions.get(i);
String regionType = region.getType();
if (regionType == DOMRegionContext.XML_TAG_ATTRIBUTE_NAME)
attrNameRegion = region;
else if (regionType == DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE) {
String attrName = node.getText(attrNameRegion);
if (attrName.equalsIgnoreCase(HTML40Namespace.ATTR_NAME_LANGUAGE))
language = StringUtils.strip(node.getText(region));
else if (attrName.equalsIgnoreCase(HTML40Namespace.ATTR_NAME_TYPE)) {
type = StringUtils.strip(node.getText(region));
/*
* Avoid partition names built with MIME subtypes,
* e.g. type="text/javascript;e4x=1"
*/
if (type != null) {
int index = type.indexOf(';');
if (index > 1)
type = type.substring(0, index);
}
break;
}
attrNameRegion = null;
}
}
}
}
if (type != null)
result = lookupScriptType(type);
else if (language != null)
result = lookupScriptLanguage(language);
return result;
}
private boolean isValidScriptingRegionType(String type) {
return type == DOMRegionContext.BLOCK_TEXT || type == DOMRegionContext.XML_CDATA_OPEN || type == DOMRegionContext.XML_CDATA_TEXT || type == DOMRegionContext.XML_CDATA_CLOSE;
}
protected void initLegalContentTypes() {
fSupportedTypes = getConfiguredContentTypes();
}
private String lookupScriptType(String type) {
for (int i = 0; i < ScriptLanguageKeys.JAVASCRIPT_MIME_TYPE_KEYS.length; i++)
if (ScriptLanguageKeys.JAVASCRIPT_MIME_TYPE_KEYS[i].equalsIgnoreCase(type))
return IHTMLPartitions.SCRIPT;
return IHTMLPartitions.SCRIPT + ".type." + type.toUpperCase(Locale.ENGLISH); //$NON-NLS-1$
}
private String lookupScriptLanguage(String language) {
for (int i = 0; i < ScriptLanguageKeys.JAVASCRIPT_LANGUAGE_KEYS.length; i++)
if (ScriptLanguageKeys.JAVASCRIPT_LANGUAGE_KEYS[i].equalsIgnoreCase(language))
return IHTMLPartitions.SCRIPT;
return IHTMLPartitions.SCRIPT + ".language." + language.toUpperCase(Locale.ENGLISH); //$NON-NLS-1$
}
public String getPartitionType(ITextRegion region, int offset) {
String result = null;
if (region.getType() == DOMRegionContext.XML_COMMENT_TEXT || region.getType() == DOMRegionContext.XML_COMMENT_OPEN || region.getType() == DOMRegionContext.XML_COMMENT_CLOSE)
result = IHTMLPartitions.HTML_COMMENT;
else if (region.getType() == DOMRegionContext.XML_DOCTYPE_DECLARATION || region.getType() == DOMRegionContext.XML_DECLARATION_OPEN)
result = IHTMLPartitions.HTML_DECLARATION;
else if (region.getType() == DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE && isScriptAttributeValue(region, offset))
result = IHTMLPartitions.SCRIPT_EVENTHANDLER;
else if (isStyleAttributeValue(region, offset))
result = ICSSPartitions.STYLE;
else
result = super.getPartitionType(region, offset);
return result;
}
public String getPartitionTypeBetween(IStructuredDocumentRegion previousNode, IStructuredDocumentRegion nextNode) {
ITextRegion previousStartTagNameRegion = null;
ITextRegion nextEndTagNameRegion = null;
ITextRegion[] regions = previousNode.getRegions().toArray();
for (int i = 0; i < regions.length; i++) {
if(regions[i].getType() == DOMRegionContext.XML_TAG_NAME) {
previousStartTagNameRegion = regions[i];
break;
}
}
regions = nextNode.getRegions().toArray();
for (int i = 0; i < regions.length; i++) {
if(regions[i].getType() == DOMRegionContext.XML_TAG_NAME) {
nextEndTagNameRegion = regions[i];
break;
}
}
if(previousStartTagNameRegion == null || nextEndTagNameRegion == null)
return IHTMLPartitions.HTML_DEFAULT;
String name1 = previousNode.getText(previousStartTagNameRegion);
String name2 = nextNode.getText(nextEndTagNameRegion);
if (name1.equalsIgnoreCase(HTML40Namespace.ElementName.SCRIPT) && name2.equalsIgnoreCase(HTML40Namespace.ElementName.SCRIPT))
// return ST_SCRIPT;
return getScriptingPartitionType(fStructuredDocument.getRegionAtCharacterOffset(previousNode.getStartOffset(previousStartTagNameRegion)));
else if (name1.equalsIgnoreCase(HTML40Namespace.ElementName.STYLE) && name2.equalsIgnoreCase(HTML40Namespace.ElementName.STYLE))
return ICSSPartitions.STYLE;
return super.getPartitionTypeBetween(previousNode, nextNode);
}
protected String getPartitionType(ForeignRegion region, int offset) {
String tagname = region.getSurroundingTag();
String result = null;
// tagname should not be null,
// but see https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=4911
if (tagname == null) {
result = getUnknown();
}
else if (tagname.equalsIgnoreCase(HTML40Namespace.ElementName.SCRIPT))
result = IHTMLPartitions.SCRIPT;
else if (tagname.equalsIgnoreCase(HTML40Namespace.ElementName.STYLE) || isStyleAttributeValue(region,offset))
result = ICSSPartitions.STYLE;
else if (region.getType() == DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE && isScriptAttributeValue(region, offset))
result = IHTMLPartitions.SCRIPT_EVENTHANDLER;
else
result = super.getPartitionType(region, offset);
return result;
}
public String getDefaultPartitionType() {
return IHTMLPartitions.HTML_DEFAULT;
}
public IDocumentPartitioner newInstance() {
return new StructuredTextPartitionerForHTML();
}
/**
* @return
*/
public static String[] getConfiguredContentTypes() {
return configuredContentTypes;
}
private boolean isScriptAttributeValue(ITextRegion region, int offset) {
if (region.getType() != DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE)
return false;
return isAttributeNameForValueInArray(EVENT_ATTRIBUTE_NAMES, region, offset);
}
/**
* @param region {@link ITextRegion} containing <code>offset</code>
* @param offset offset in the given <code>region</code> to check if it is in
* the attribute value region of a style attribute
* @return <code>true</code> if the given offset in the given region is
* in the value region of a style attribute, <code>false</code> otherwise
*/
private boolean isStyleAttributeValue(ITextRegion region, int offset) {
boolean isStyleAttributeValue = false;
if (region.getType() == DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE) {
isStyleAttributeValue = isAttributeNameForValueInArray(STYLE_ATTRIBUTE_NAMES, region, offset);
}
return isStyleAttributeValue;
}
/**
* <p>determines if the attribute name associated with the given attribute region
* is in the given array of attribute names</p>
*
* @param attributeNames determine if the attribute name associated with the given offset
* is in this array of attribute names
* @param attrValueRegion {@link ITextRegion} of the attribute region containing the given offset
* @param offset offset in an attribute region to determine if it is in the list of given attribute names
* @return <code>true</code> if the attribute name associated with the given offset is in the given
* list of attribute names, <code>false</code> otherwise
*/
private boolean isAttributeNameForValueInArray(String[] attributeNames, ITextRegion attrValueRegion, int offset) {
IStructuredDocumentRegion node = fStructuredDocument.getRegionAtCharacterOffset(offset);
ITextRegionList regionList = node.getRegions();
int currentIndex = regionList.indexOf(attrValueRegion);
/*
* 4 is the minimum index allowing for the tag's open, name, attribute
* name and equals character to appear first
*/
if (currentIndex < 4)
return false;
ITextRegion tagAttrNameRegion = regionList.get(currentIndex - 2);
boolean foundAttributeName = false;
if (fStructuredDocument instanceof IRegionComparible) {
int start = node.getStartOffset(tagAttrNameRegion);
for (int i = 0; !foundAttributeName && i < attributeNames.length; i++) {
foundAttributeName = ((IRegionComparible) fStructuredDocument).regionMatchesIgnoreCase(start, tagAttrNameRegion.getTextLength(), attributeNames[i]);
}
}
else {
String tagAttrName = node.getText(tagAttrNameRegion);
foundAttributeName = StringUtils.contains(attributeNames, tagAttrName, false);
}
return foundAttributeName;
}
}