/*
* 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.Lists;
import com.google.common.css.compiler.ast.CssCompilerPass;
import com.google.common.css.compiler.ast.CssDeclarationBlockNode;
import com.google.common.css.compiler.ast.CssNode;
import com.google.common.css.compiler.ast.CssRulesetNode;
import com.google.common.css.compiler.ast.CssSelectorListNode;
import com.google.common.css.compiler.ast.CssSelectorNode;
import com.google.common.css.compiler.ast.MutatingVisitController;
import com.google.common.css.compiler.ast.SkippingTreeVisitor;
import java.util.List;
/**
* Compiler pass that splits ruleset nodes into multiple ruleset nodes by
* selector and declaration.
*
* @author oana@google.com (Oana Florescu)
*/
public class SplitRulesetNodes extends SkippingTreeVisitor
implements CssCompilerPass {
private final MutatingVisitController visitController;
public SplitRulesetNodes(MutatingVisitController visitController) {
this(visitController, false);
}
public SplitRulesetNodes(MutatingVisitController visitController,
boolean skipping) {
super(skipping);
this.visitController = visitController;
}
@Override
public boolean enterRuleset(CssRulesetNode node) {
boolean canModifyRuleset = canModifyRuleset(node);
if (canModifyRuleset) {
List<CssNode> replacementNodes = Lists.newArrayList();
CssSelectorListNode selectors = node.getSelectors();
CssDeclarationBlockNode declarations = node.getDeclarations();
for (CssSelectorNode sel : selectors.childIterable()) {
for (CssNode child : declarations.childIterable()) {
CssRulesetNode ruleset = new CssRulesetNode();
ruleset.setSourceCodeLocation(node.getSourceCodeLocation());
ruleset.addDeclaration(child.deepCopy());
ruleset.addSelector(sel.deepCopy());
replacementNodes.add(ruleset);
}
}
visitController.replaceCurrentBlockChildWith(
replacementNodes,
false);
}
return canModifyRuleset;
}
@Override
public void runPass() {
visitController.startVisit(this);
}
}