/*
* Copyright 2009 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.common.css.compiler.passes;
import com.google.common.collect.ImmutableList;
import com.google.common.css.SubstitutionMap;
import com.google.common.css.compiler.ast.CssClassSelectorNode;
import com.google.common.css.compiler.ast.CssCompilerPass;
import com.google.common.css.compiler.ast.CssIdSelectorNode;
import com.google.common.css.compiler.ast.DefaultTreeVisitor;
import com.google.common.css.compiler.ast.MutatingVisitController;
/**
* Compiler pass that does CSS class renaming given a renaming map.
*
* @author oana@google.com (Oana Florescu)
* @author fbenz@google.com (Florian Benz)
*/
public class CssClassRenaming extends DefaultTreeVisitor
implements CssCompilerPass {
private final MutatingVisitController visitController;
private final SubstitutionMap cssClassRenamingMap;
private final SubstitutionMap elementIdMap;
public CssClassRenaming(MutatingVisitController visitController,
SubstitutionMap cssClassRenamingMap, SubstitutionMap elementIdMap) {
this.visitController = visitController;
this.cssClassRenamingMap = cssClassRenamingMap;
this.elementIdMap = elementIdMap;
}
@Override
public boolean enterClassSelector(CssClassSelectorNode node) {
if (cssClassRenamingMap == null) {
return true;
}
String substitution = cssClassRenamingMap.get(node.getRefinerName());
if (substitution == null) {
return true;
}
CssClassSelectorNode classSelector =
new CssClassSelectorNode(substitution, node.getSourceCodeLocation());
visitController.replaceCurrentBlockChildWith(
ImmutableList.of(classSelector), false /* visitTheReplacementNodes */);
return true;
}
@Override
public boolean enterIdSelector(CssIdSelectorNode node) {
if (elementIdMap == null) {
return true;
}
String substitution = elementIdMap.get(node.getRefinerName());
if (substitution == null) {
return true;
}
CssIdSelectorNode idSelector =
new CssIdSelectorNode(substitution, node.getSourceCodeLocation());
visitController.replaceCurrentBlockChildWith(
ImmutableList.of(idSelector), false /* visitTheReplacementNodes */);
return true;
}
@Override
public void runPass() {
visitController.startVisit(this);
}
}