com.xceptance.common.xml.HtmlDomPrinter Maven / Gradle / Ivy
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XLT (Xceptance LoadTest) is an extensive load and performance test tool developed and maintained by Xceptance.
/*
* Copyright (c) 2005-2022 Xceptance Software Technologies GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.xceptance.common.xml;
import java.io.PrintWriter;
import java.io.Writer;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.text.StringEscapeUtils;
import org.w3c.dom.CDATASection;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
/**
* An {@link AbstractDomPrinter} implementation that generates HTML or XHTML output from a DOM. What format will be
* generated depends on the document type of the DOM. If no document type is associated with the DOM, the output will be
* HTML by default. The two output formats differ only in the way empty tags are closed. In HTML mode, empty tags are
* closed with ">", while in XHTML mode they are closed with " />". Tags which must have a closing tag according
* to the HTML specification will get a closing tag in both modes, even if they are empty, for example
* "<div></div>"
*
* @see XmlDomPrinter
* @author Jörg Werner (Xceptance Software Technologies GmbH)
*/
public class HtmlDomPrinter extends AbstractDomPrinter
{
/**
* The HTML tags which are empty. Not sure whether this list is complete/correct. All other tags will always get a
* closing tag.
*/
private static final String[] EMPTY_HTML_TAGS =
{
"base", "basefont", "br", "col", "frame", "hr", "img", "input", "isindex", "link", "meta", "param"
};
private static final String[] LITERAL_TEXT_ELEMENTS =
{
"style", "script", "xmp", "iframe", "noembed", "noframes", "noscript", "plaintext"
};
/**
* Whether or not the output will be XHTML. Determined from the document's document type.
*/
private boolean isXhtml;
/**
* Creates a new printer object with pretty-printing disabled.
*/
public HtmlDomPrinter()
{
this(-1);
}
/**
* Creates a new printer object. Whether pretty-printing is enabled depends on the value of the "spaces" parameter.
* If the value is negative, then pretty-printing is disabled. Otherwise the elements are indented with the number
* of spaces given.
*
* @param spaces
* the number of spaces of one indentation level
*/
public HtmlDomPrinter(final int spaces)
{
super(spaces);
}
/**
* {@inheritDoc}
*/
@Override
public void printNode(final Node node, final Writer out)
{
// determine the mode before we start
isXhtml = isXhtml(node);
super.printNode(node, out);
}
/**
* {@inheritDoc}
*/
@Override
protected void printEmptyElementClosing(final Element element, final PrintWriter printWriter)
{
final String tagName = element.getTagName();
if (ArrayUtils.contains(EMPTY_HTML_TAGS, tagName))
{
if (isXhtml)
{
printWriter.print(" />");
}
else
{
printWriter.print(">");
}
}
else
{
printWriter.print(">");
}
}
/**
* Determines whether or not the output format should be XHTML.
*
* @param node
* the root node to print
* @return true if the output format should be XHTML, false otherwise
*/
protected boolean isXhtml(final Node node)
{
// get the document
Document document;
if (node.getNodeType() == Node.DOCUMENT_NODE)
{
// the node is the document
document = (Document) node;
}
else
{
document = node.getOwnerDocument();
}
// determine mode
if (document != null)
{
// get the mode from the document type
final DocumentType documentType = document.getDoctype();
final String publicId = (documentType != null ? documentType.getPublicId() : null);
return publicId != null && publicId.toUpperCase().contains("XHTML");
}
else
{
// default mode
return true;
}
}
private boolean needEscapeText(final Node text)
{
Node node = text;
while ((node = node.getParentNode()) != null)
{
if (node.getNodeType() == Node.ELEMENT_NODE && ArrayUtils.contains(LITERAL_TEXT_ELEMENTS, ((Element) node).getTagName()))
{
return false;
}
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
protected void printText(Text text, String indentation, PrintWriter printWriter)
{
String s = text.getData();
if (needEscapeText(text))
{
s = StringEscapeUtils.escapeXml10(s);
}
if (prettyPrinting)
{
// print non-blank text only
s = s.trim();
if (s.length() > 0)
{
printWriter.println(indentation + s);
}
}
else
{
printWriter.print(s);
}
}
/**
* {@inheritDoc}
*/
@Override
protected void printCDataSection(CDATASection cdataSection, String indentation, PrintWriter printWriter)
{
String s = cdataSection.getData();
if (needEscapeText(cdataSection))
{
s = StringEscapeUtils.escapeXml10(s);
}
printWriter.print(indentation + "");
if (prettyPrinting)
{
printWriter.println();
}
}
}