/*
* Copyright 2007 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.gwt.dev.js;
import com.google.gwt.dev.js.ast.JsName;
import com.google.gwt.dev.js.ast.JsProgram;
import com.google.gwt.dev.js.ast.JsRootScope;
import com.google.gwt.dev.js.ast.JsScope;
import java.util.Iterator;
import java.util.List;
/**
* A namer that uses long, fully qualified names for maximum unambiguous
* debuggability.
*/
public class JsVerboseNamer {
public static void exec(JsProgram program) {
new JsVerboseNamer(program).execImpl();
}
private final JsProgram program;
public JsVerboseNamer(JsProgram program) {
this.program = program;
}
private void execImpl() {
visit(program.getRootScope());
}
private boolean isLegal(String newIdent) {
// only keywords are forbidden
return !JsKeywords.isKeyword(newIdent);
}
private void visit(JsScope scope) {
// Visit children.
List<JsScope> children = scope.getChildren();
for (Iterator<JsScope> it = children.iterator(); it.hasNext();) {
visit(it.next());
}
JsRootScope rootScope = program.getRootScope();
if (scope == rootScope) {
return;
}
// Visit all my idents.
for (Iterator<JsName> it = scope.getAllNames(); it.hasNext();) {
JsName name = it.next();
if (!name.isObfuscatable()) {
// Unobfuscatable names become themselves.
name.setShortIdent(name.getIdent());
continue;
}
String fullIdent = name.getIdent();
if (!isLegal(fullIdent)) {
String checkIdent = fullIdent;
for (int i = 0; true; ++i) {
checkIdent = fullIdent + "_" + i;
if (isLegal(checkIdent)) {
break;
}
}
name.setShortIdent(checkIdent);
} else {
// set each name's short ident to its full ident
name.setShortIdent(fullIdent);
}
}
}
}