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/*******************************************************************************
* Copyright (c) 2001, 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
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
*******************************************************************************/
package org.eclipse.wst.xml.core.internal.document;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionList;
import org.eclipse.wst.xml.core.internal.regions.DOMRegionContext;
/**
* Provides convenient functions to handle IStructuredDocumentRegion and
* ITextRegion.
*/
class StructuredDocumentRegionUtil {
/**
* Extracts contents enclosed with quotes. Quotes may be double or single.
*/
static String getAttrValue(IStructuredDocumentRegion flatNode, ITextRegion region) {
if (region == null)
return null;
if (flatNode == null)
return null;
String value = flatNode.getText(region);
if (value == null)
return null;
int length = value.length();
if (length == 0)
return value;
char firstChar = value.charAt(0);
if (firstChar == '"' || firstChar == '\'') {
if (length == 1)
return null;
if (value.charAt(length - 1) == firstChar)
length--;
return value.substring(1, length);
}
return value;
}
/**
* Extracts the name without heading '&' and tailing ';'.
*/
static String getEntityRefName(IStructuredDocumentRegion flatNode, ITextRegion region) {
if (region == null)
return null;
String ref = flatNode.getText(region);
int length = ref.length();
if (length == 0)
return ref;
int offset = 0;
if (ref.charAt(0) == '&')
offset = 1;
if (ref.charAt(length - 1) == ';')
length--;
if (offset >= length)
return null;
return ref.substring(offset, length);
}
/**
* Returns the first region.
*/
static ITextRegion getFirstRegion(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return null;
ITextRegionList regions = flatNode.getRegions();
if (regions == null || regions.size() == 0)
return null;
return regions.get(0);
}
/**
* Returns the type of the first region.
*/
static String getFirstRegionType(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return DOMRegionContext.UNDEFINED;
ITextRegionList regions = flatNode.getRegions();
if (regions == null || regions.size() == 0)
return DOMRegionContext.UNDEFINED;
ITextRegion region = regions.get(0);
return region.getType();
}
/**
*/
static IStructuredDocumentRegion getFirstStructuredDocumentRegion(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return null;
if (flatNode instanceof StructuredDocumentRegionContainer) {
flatNode = ((StructuredDocumentRegionContainer) flatNode).getFirstStructuredDocumentRegion();
}
if (flatNode instanceof StructuredDocumentRegionProxy) {
flatNode = ((StructuredDocumentRegionProxy) flatNode).getStructuredDocumentRegion();
}
return flatNode;
}
/**
* Returns the last region.
*/
static ITextRegion getLastRegion(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return null;
ITextRegionList regions = flatNode.getRegions();
if (regions == null || regions.size() == 0)
return null;
return regions.get(regions.size() - 1);
}
/**
* Returns the type of the first region.
*/
static String getLastRegionType(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return DOMRegionContext.UNDEFINED;
ITextRegionList regions = flatNode.getRegions();
if (regions == null || regions.size() == 0)
return DOMRegionContext.UNDEFINED;
ITextRegion region = regions.get(regions.size() - 1);
return region.getType();
}
/**
*/
static IStructuredDocumentRegion getLastStructuredDocumentRegion(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return null;
if (flatNode instanceof StructuredDocumentRegionContainer) {
flatNode = ((StructuredDocumentRegionContainer) flatNode).getLastStructuredDocumentRegion();
}
if (flatNode instanceof StructuredDocumentRegionProxy) {
flatNode = ((StructuredDocumentRegionProxy) flatNode).getStructuredDocumentRegion();
}
return flatNode;
}
/**
*/
static IStructuredDocumentRegion getStructuredDocumentRegion(IStructuredDocumentRegion flatNode) {
if (flatNode == null)
return null;
if (flatNode instanceof StructuredDocumentRegionProxy) {
flatNode = ((StructuredDocumentRegionProxy) flatNode).getStructuredDocumentRegion();
}
return flatNode;
}
StructuredDocumentRegionUtil() {
super();
}
}
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