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/*******************************************************************************
* Copyright (c) 2006, 2015 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.ui.internal.cheatsheets.composite.parser;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class MarkupParser {
public static String parseAndTrimTextMarkup(Node parentNode) {
return parseMarkup(parentNode).trim();
}
private static String parseMarkup(Node parentNode) {
NodeList children = parentNode.getChildNodes();
StringBuffer text = new StringBuffer();
for (int i = 0; i < children.getLength(); i++) {
Node childNode = children.item(i);
if (childNode.getNodeType() == Node.TEXT_NODE) {
text.append(escapeText(childNode.getNodeValue()));
} else if (childNode.getNodeType() == Node.ELEMENT_NODE) {
text.append('<');
text.append(childNode.getNodeName());
// Add the attributes
NamedNodeMap attributes = childNode.getAttributes();
if (attributes != null) {
for (int x = 0; x < attributes.getLength(); x++) {
Node attribute = attributes.item(x);
String attributeName = attribute.getNodeName();
if (attributeName == null)
continue;
text.append(' ');
text.append(attributeName);
text.append(" = \""); //$NON-NLS-1$
text.append(attribute.getNodeValue());
text.append('"');
}
}
text.append('>');
text.append(parseMarkup(childNode));
text.append("</"); //$NON-NLS-1$
text.append(childNode.getNodeName());
text.append('>');
}
}
return text.toString();
}
public static String escapeText(String input) {
StringBuffer result = new StringBuffer(input.length() + 10);
for (int i = 0; i < input.length(); ++i)
appendEscapedChar(result, input.charAt(i));
return result.toString();
}
private static void appendEscapedChar(StringBuffer buffer, char c) {
String replacement = getReplacement(c);
if (replacement != null) {
buffer.append(replacement);
} else {
buffer.append(c);
}
}
private static String getReplacement(char c) {
// Encode characters which need to be escaped for use in form text
// Replace tabs with spaces
switch (c) {
case '<' :
return "<"; //$NON-NLS-1$
case '>' :
return ">"; //$NON-NLS-1$
case '&' :
return "&"; //$NON-NLS-1$
case '\t' :
return " "; //$NON-NLS-1$
}
return null;
}
/*
* Add paragraph tags if not already present
*/
public static String createParagraph(String text, String imageTag) {
String result = ""; //$NON-NLS-1$
String trimmed = text.trim();
boolean addParagraphTags = trimmed.length() < 3 || trimmed.charAt(0)!='<' ||
(trimmed.charAt(1)!='p' && trimmed.charAt(1) != 'l');
if (addParagraphTags) {
result += "<p>"; //$NON-NLS-1$
}
if (imageTag != null) {
result += "<img href=\""; //$NON-NLS-1$
result += imageTag;
result += "\"/> "; //$NON-NLS-1$
}
result += trimmed;
if (addParagraphTags) {
result += "</p>"; //$NON-NLS-1$
}
return result;
}
}
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