| /* |
| * Copyright 2014 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.resources.gss; |
| |
| import com.google.gwt.resources.gss.ast.CssRuntimeConditionalRuleNode; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.CssCompilerPass; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.CssConditionalBlockNode; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.CssConditionalRuleNode; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.DefaultTreeVisitor; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.VisitController; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Visitor that collects conditional blocks containing conditions that need to be evaluated at |
| * runtime. |
| */ |
| public class RuntimeConditionalBlockCollector extends DefaultTreeVisitor implements |
| CssCompilerPass { |
| |
| private final VisitController visitController; |
| |
| private Set<CssConditionalBlockNode> runtimeConditionalBlock; |
| |
| public RuntimeConditionalBlockCollector(VisitController visitController) { |
| this.visitController = visitController; |
| } |
| |
| @Override |
| public boolean enterConditionalBlock(CssConditionalBlockNode block) { |
| for (CssConditionalRuleNode currentConditional : block.childIterable()) { |
| if (currentConditional instanceof CssRuntimeConditionalRuleNode) { |
| runtimeConditionalBlock.add(block); |
| return true; |
| } |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public void runPass() { |
| runtimeConditionalBlock = new HashSet<CssConditionalBlockNode>(); |
| |
| visitController.startVisit(this); |
| } |
| |
| public Set<CssConditionalBlockNode> getRuntimeConditionalBlock() { |
| return runtimeConditionalBlock; |
| } |
| } |