| /* |
| * 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.CssJavaExpressionNode; |
| import com.google.gwt.thirdparty.common.css.SourceCodeLocation; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.CssValueNode; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.ErrorManager; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.GssFunction; |
| import com.google.gwt.thirdparty.common.css.compiler.ast.GssFunctionException; |
| import com.google.gwt.thirdparty.guava.common.collect.ImmutableList; |
| |
| import java.util.List; |
| |
| /** |
| * GSS function that creates a {@link com.google.gwt.resources.gss.ast.CssJavaExpressionNode} |
| * in order to evaluate a Java expression at runtime. |
| */ |
| public class EvalFunction implements GssFunction { |
| |
| public static String getName() { |
| return "eval"; |
| } |
| |
| @Override |
| public List<CssValueNode> getCallResultNodes(List<CssValueNode> args, ErrorManager errorManager) |
| throws GssFunctionException { |
| CssValueNode functionToEval = args.get(0); |
| |
| SourceCodeLocation sourceCodeLocation = extractSourceCodeLocation(functionToEval); |
| |
| CssJavaExpressionNode result = new CssJavaExpressionNode(functionToEval.getValue(), |
| sourceCodeLocation); |
| |
| return ImmutableList.of((CssValueNode) result); |
| } |
| |
| @Override |
| public String getCallResultString(List<String> args) throws GssFunctionException { |
| return args.get(0); |
| } |
| |
| @Override |
| public Integer getNumExpectedArguments() { |
| return 1; |
| } |
| |
| private SourceCodeLocation extractSourceCodeLocation(CssValueNode functionToEval) { |
| return functionToEval.getParent().getParent().getSourceCodeLocation(); |
| } |
| } |