/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Rhino code, released
* May 6, 1999.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1997-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Yegge
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU General Public License Version 2 or later (the "GPL"), in which
* case the provisions of the GPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
* the GPL and not to allow others to use your version of this file under the
* MPL, indicate your decision by deleting the provisions above and replacing
* them with the notice and other provisions required by the GPL. If you do
* not delete the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* ***** END LICENSE BLOCK ***** */
package org.mozilla.javascript.ast;
import org.mozilla.javascript.Token;
/**
* If-else statement. Node type is {@link Token#IF}.<p>
*
* <pre><i>IfStatement</i> :
* <b>if</b> ( Expression ) Statement <b>else</b> Statement
* <b>if</b> ( Expression ) Statement</pre>
*/
public class IfStatement extends AstNode {
private AstNode condition;
private AstNode thenPart;
private int elsePosition = -1;
private AstNode elsePart;
private int lp = -1;
private int rp = -1;
{
type = Token.IF;
}
public IfStatement() {
}
public IfStatement(int pos) {
super(pos);
}
public IfStatement(int pos, int len) {
super(pos, len);
}
/**
* Returns if condition
*/
public AstNode getCondition() {
return condition;
}
/**
* Sets if condition.
* @throws IllegalArgumentException if {@code condition} is {@code null}.
*/
public void setCondition(AstNode condition) {
assertNotNull(condition);
this.condition = condition;
condition.setParent(this);
}
/**
* Returns statement to execute if condition is true
*/
public AstNode getThenPart() {
return thenPart;
}
/**
* Sets statement to execute if condition is true
* @throws IllegalArgumentException if thenPart is {@code null}
*/
public void setThenPart(AstNode thenPart) {
assertNotNull(thenPart);
this.thenPart = thenPart;
thenPart.setParent(this);
}
/**
* Returns statement to execute if condition is false
*/
public AstNode getElsePart() {
return elsePart;
}
/**
* Sets statement to execute if condition is false
* @param elsePart statement to execute if condition is false.
* Can be {@code null}.
*/
public void setElsePart(AstNode elsePart) {
this.elsePart = elsePart;
if (elsePart != null)
elsePart.setParent(this);
}
/**
* Returns position of "else" keyword, or -1
*/
public int getElsePosition() {
return elsePosition;
}
/**
* Sets position of "else" keyword, -1 if not present
*/
public void setElsePosition(int elsePosition) {
this.elsePosition = elsePosition;
}
/**
* Returns left paren offset
*/
public int getLp() {
return lp;
}
/**
* Sets left paren offset
*/
public void setLp(int lp) {
this.lp = lp;
}
/**
* Returns right paren position, -1 if missing
*/
public int getRp() {
return rp;
}
/**
* Sets right paren position, -1 if missing
*/
public void setRp(int rp) {
this.rp = rp;
}
/**
* Sets both paren positions
*/
public void setParens(int lp, int rp) {
this.lp = lp;
this.rp = rp;
}
@Override
public String toSource(int depth) {
String pad = makeIndent(depth);
StringBuilder sb = new StringBuilder(32);
sb.append(pad);
sb.append("if (");
sb.append(condition.toSource(0));
sb.append(") ");
if (!(thenPart instanceof Block)) {
sb.append("\n").append(makeIndent(depth));
}
sb.append(thenPart.toSource(depth).trim());
if (elsePart instanceof IfStatement) {
sb.append(" else ");
sb.append(elsePart.toSource(depth).trim());
} else if (elsePart != null) {
sb.append(" else ");
sb.append(elsePart.toSource(depth).trim());
}
sb.append("\n");
return sb.toString();
}
/**
* Visits this node, the condition, the then-part, and
* if supplied, the else-part.
*/
@Override
public void visit(NodeVisitor v) {
if (v.visit(this)) {
condition.visit(v);
thenPart.visit(v);
if (elsePart != null) {
elsePart.visit(v);
}
}
}
}