/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript.ast;
import org.mozilla.javascript.Token;
/**
* Node representing comments.
* Node type is {@link Token#COMMENT}.<p>
*
* <p>JavaScript effectively has five comment types:
* <ol>
* <li>// line comments</li>
* <li>/<span class="none">* block comments *\/</li>
* <li>/<span class="none">** jsdoc comments *\/</li>
* <li><!-- html-open line comments</li>
* <li>^\\s*--> html-close line comments</li>
* </ol>
*
* <p>The first three should be familiar to Java programmers. JsDoc comments
* are really just block comments with some conventions about the formatting
* within the comment delimiters. Line and block comments are described in the
* Ecma-262 specification. <p>
*
* <p>SpiderMonkey and Rhino also support HTML comment syntax, but somewhat
* counterintuitively, the syntax does not produce a block comment. Instead,
* everything from the string <!-- through the end of the line is considered
* a comment, and if the token --> is the first non-whitespace on the line,
* then the line is considered a line comment. This is to support parsing
* JavaScript in <script> HTML tags that has been "hidden" from very old
* browsers by surrounding it with HTML comment delimiters. <p>
*
* Note the node start position for Comment nodes is still relative to the
* parent, but Comments are always stored directly in the AstRoot node, so
* they are also effectively absolute offsets.
*/
public class Comment extends AstNode {
private String value;
private Token.CommentType commentType;
{
type = Token.COMMENT;
}
/**
* Constructs a new Comment
* @param pos the start position
* @param len the length including delimiter(s)
* @param type the comment type
* @param value the value of the comment, as a string
*/
public Comment(int pos, int len, Token.CommentType type, String value) {
super(pos, len);
commentType = type;
this.value = value;
}
/**
* Returns the comment style
*/
public Token.CommentType getCommentType() {
return commentType;
}
/**
* Sets the comment style
* @param type the comment style, a
* {@link org.mozilla.javascript.Token.CommentType}
*/
public void setCommentType(Token.CommentType type) {
this.commentType = type;
}
/**
* Returns a string of the comment value.
*/
public String getValue() {
return value;
}
@Override
public String toSource(int depth) {
StringBuilder sb = new StringBuilder(getLength() + 10);
sb.append(makeIndent(depth));
sb.append(value);
return sb.toString();
}
/**
* Comment nodes are not visited during normal visitor traversals,
* but comply with the {@link AstNode#visit} interface.
*/
@Override
public void visit(NodeVisitor v) {
v.visit(this);
}
}