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Comment.java
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/
Comment.java
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package org.jsoup.nodes;
import org.jsoup.parser.ParseSettings;
import org.jsoup.parser.Parser;
import org.jspecify.annotations.Nullable;
import java.io.IOException;
/**
A comment node.
@author Jonathan Hedley, jonathan@hedley.net */
public class Comment extends LeafNode {
/**
Create a new comment node.
@param data The contents of the comment
*/
public Comment(String data) {
value = data;
}
public String nodeName() {
return "#comment";
}
/**
Get the contents of the comment.
@return comment content
*/
public String getData() {
return coreValue();
}
public Comment setData(String data) {
coreValue(data);
return this;
}
@Override
void outerHtmlHead(Appendable accum, int depth, Document.OutputSettings out) throws IOException {
if (out.prettyPrint() && ((isEffectivelyFirst() && parentNode instanceof Element && ((Element) parentNode).tag().formatAsBlock()) || (out.outline() )))
indent(accum, depth, out);
accum
.append("<!--")
.append(getData())
.append("-->");
}
@Override
void outerHtmlTail(Appendable accum, int depth, Document.OutputSettings out) {}
@Override
public String toString() {
return outerHtml();
}
@Override
public Comment clone() {
return (Comment) super.clone();
}
/**
* Check if this comment looks like an XML Declaration.
* @return true if it looks like, maybe, it's an XML Declaration.
*/
public boolean isXmlDeclaration() {
String data = getData();
return isXmlDeclarationData(data);
}
private static boolean isXmlDeclarationData(String data) {
return (data.length() > 1 && (data.startsWith("!") || data.startsWith("?")));
}
/**
* Attempt to cast this comment to an XML Declaration node.
* @return an XML declaration if it could be parsed as one, null otherwise.
*/
public @Nullable XmlDeclaration asXmlDeclaration() {
String data = getData();
XmlDeclaration decl = null;
String declContent = data.substring(1, data.length() - 1);
// make sure this bogus comment is not immediately followed by another, treat as comment if so
if (isXmlDeclarationData(declContent))
return null;
String fragment = "<" + declContent + ">";
// use the HTML parser not XML, so we don't get into a recursive XML Declaration on contrived data
Document doc = Parser.htmlParser().settings(ParseSettings.preserveCase).parseInput(fragment, baseUri());
if (doc.body().childrenSize() > 0) {
Element el = doc.body().child(0);
decl = new XmlDeclaration(NodeUtils.parser(doc).settings().normalizeTag(el.tagName()), data.startsWith("!"));
decl.attributes().addAll(el.attributes());
}
return decl;
}
}