com.googlecode.mgwt.theme.server.ClassesCollectorVisitor.java Source code

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Here is the source code for com.googlecode.mgwt.theme.server.ClassesCollectorVisitor.java

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/*
 * Copyright 2010 Daniel Kurka
 *
 * 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.googlecode.mgwt.theme.server;

import com.google.gwt.resources.css.ast.Context;
import com.google.gwt.resources.css.ast.CssSelector;
import com.google.gwt.resources.css.ast.CssVisitor;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

/**
 * A visitor that collects all classes of a style sheet.
 */
public class ClassesCollectorVisitor extends CssVisitor {

    private Set<String> allClasses = new HashSet<String>();

    public Set<String> getAllClasses() {
        return Collections.unmodifiableSet(allClasses);
    }

    @Override
    public boolean visit(CssSelector x, Context ctx) {
        allClasses.add(x.getSelector());
        return true;
    }
}