// 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.render.JsMinimalPrinter;
import com.google.caja.reporting.RenderContext;
import java.util.List;
/**
*
* @author mikesamuel@gmail.com
*/
public final class ForLoop extends Loop implements NestedScope {
private static final long serialVersionUID = 295928890053083020L;
// Local member variables are only changed in childrenChanged(),
// so this class satisfies the immutability contract of the superclass.
private Statement initializer;
private Expression condition;
private Statement increment;
private Statement body;
@ReflectiveCtor
public ForLoop(
FilePosition pos, String value, List<? extends ParseTreeNode> children) {
this(pos, value,
(Statement) children.get(0),
(Expression) children.get(1),
(Statement) children.get(2),
(Statement) children.get(3));
}
public ForLoop(
FilePosition pos, String label, Statement initializer, Expression cond,
Statement increment, Statement body) {
super(pos, label, ParseTreeNode.class);
createMutation()
.appendChild(initializer)
.appendChild(cond)
.appendChild(increment)
.appendChild(body)
.execute();
}
@Override
protected void childrenChanged() {
super.childrenChanged();
List<? extends ParseTreeNode> children = children();
this.initializer = (Statement) children.get(0);
if (!(this.initializer instanceof Declaration
|| this.initializer instanceof ExpressionStmt
|| this.initializer instanceof MultiDeclaration
|| this.initializer instanceof Noop)) {
throw new IllegalArgumentException("" + this.initializer);
}
this.condition = (Expression) children.get(1);
this.increment = (Statement) children.get(2);
this.body = (Statement) children.get(3);
}
@Override
public Expression getCondition() { return condition; }
@Override
public Statement getBody() { return body; }
public Statement getInitializer() { return this.initializer; }
public Statement getIncrement() { return this.increment; }
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("(");
if (!(initializer instanceof Noop)) { initializer.render(rc); }
out.consume(JsMinimalPrinter.NOOP);
if (!(condition instanceof BooleanLiteral
&& ((BooleanLiteral) condition).getValue())) {
condition.render(rc);
}
out.consume(JsMinimalPrinter.NOOP);
if (!(increment instanceof Noop)) { increment.render(rc); }
out.consume(")");
getBody().renderBlock(rc, false);
}
public boolean hasHangingConditional() {
return body.hasHangingConditional();
}
}