// Copyright (C) 2005 Google Inc.
//
// 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.google.caja.parser.js;
import com.google.caja.lexer.FilePosition;
import com.google.caja.lexer.TokenConsumer;
import com.google.caja.parser.ParseTreeNode;
import com.google.caja.reporting.RenderContext;
import java.util.List;
/**
* <code>for (key in container) body</code>
*
* @author mikesamuel@gmail.com
*/
public final class ForEachLoop extends LabeledStatement implements NestedScope {
private static final long serialVersionUID = 5611785542136135478L;
// Local member variables are only changed in childrenChanged(),
// so this class satisfies the immutability contract of the superclass.
private Statement keyReceiver;
private Expression container;
private Statement body;
@ReflectiveCtor
public ForEachLoop(
FilePosition pos, String value, List<? extends ParseTreeNode> children) {
super(pos, value, ParseTreeNode.class);
createMutation().appendChildren(children).execute();
}
public ForEachLoop(
FilePosition pos, String label, Declaration var, Expression container,
Statement body) {
super(pos, label, ParseTreeNode.class);
createMutation()
.appendChild(var)
.appendChild(container)
.appendChild(body)
.execute();
}
public ForEachLoop(
FilePosition pos, String label, Expression lvalue, Expression container,
Statement body) {
super(pos, label, ParseTreeNode.class);
ExpressionStmt varStmt = new ExpressionStmt(
lvalue.getFilePosition(), lvalue);
createMutation()
.appendChild(varStmt)
.appendChild(container)
.appendChild(body)
.execute();
}
public Statement getKeyReceiver() { return keyReceiver; }
public Expression getContainer() { return container; }
public Statement getBody() { return body; }
@Override
public boolean isTargetForContinue() { return true; }
@Override
protected void childrenChanged() {
super.childrenChanged();
List<? extends ParseTreeNode> children = children();
this.keyReceiver = (Statement) children.get(0);
if (keyReceiver instanceof ExpressionStmt) {
Expression e = ((ExpressionStmt) keyReceiver).getExpression();
if (!e.isLeftHandSide()) {
throw new IllegalArgumentException("Not an lvalue: " + e);
}
}
this.container = (Expression) children.get(1);
this.body = (Statement) children.get(2);
}
public void render(RenderContext rc) {
TokenConsumer out = rc.getOut();
out.mark(getFilePosition());
String label = getRenderedLabel();
if (null != label) {
out.consume(label);
out.consume(":");
}
out.consume("for");
out.consume("(");
keyReceiver.render(rc);
out.consume("in");
container.render(rc);
out.consume(")");
body.renderBlock(rc, false);
}
public boolean hasHangingConditional() {
return body.hasHangingConditional();
}
}