// 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;
/**
* A labeled statement implementation that can apply to any statement.
* Javascript allows labels on statements other than loops.
*
* @author mikesamuel@gmail.com
*/
public final class LabeledStmtWrapper extends LabeledStatement {
private static final long serialVersionUID = 3431046080336293584L;
// TODO(mikesamuel): Investigate whether use of continue to a non loop
// functions as goto, and whether that can introduces vulnerabilities.
// TODO(mikesamuel): Do we want to remove labelling of non-loop statements
// from Caja?
// TODO(mikesamuel): Erase the distinction between LabeledStmtWrapper and
// LabeledStatement.
@ReflectiveCtor
public LabeledStmtWrapper(
FilePosition pos, String value, List<? extends ParseTreeNode> children) {
this(pos, value, (Statement)children.get(0));
}
public LabeledStmtWrapper(FilePosition pos, String label, Statement body) {
super(pos, label, Statement.class);
appendChild(body);
}
public Statement getBody() { return (Statement) children().get(0); }
@Override
public boolean isTargetForContinue() { return false; }
public void render(RenderContext rc) {
TokenConsumer out = rc.getOut();
out.mark(getFilePosition());
String label = getRenderedLabel();
if (null != label) {
out.consume(label);
out.consume(":");
}
getBody().render(rc);
}
@Override
public boolean isTerminal() {
return getBody().isTerminal();
}
public boolean hasHangingConditional() {
return getBody().hasHangingConditional();
}
}