/*
* Copyright 2013 Julien Dramaix.
*
* 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.common.collect.ImmutableList;
import com.google.common.css.compiler.ast.CssValueNode;
import com.google.common.css.compiler.ast.ErrorManager;
import com.google.common.css.compiler.ast.GssFunction;
import com.google.common.css.compiler.ast.GssFunctionException;
import com.google.gwt.resources.gss.ast.CssDotPathNode;
import java.util.List;
public class ValueFunction implements GssFunction {
public static String getName() {
return "value";
}
@Override
public List<CssValueNode> getCallResultNodes(List<CssValueNode> args, ErrorManager errorManager)
throws GssFunctionException {
if (args.size() == 0 || args.size() > 3) {
throw new GssFunctionException(getName() + " function take one, two or three arguments");
}
String functionPath = args.get(0).getValue();
String prefix = null;
String suffix = null;
if (args.size() > 1) {
suffix = args.get(1).getValue();
}
if (args.size() > 2) {
prefix = args.get(2).getValue();
}
CssDotPathNode cssDotPathNode = new CssDotPathNode(functionPath, prefix, suffix, args.get(0).getSourceCodeLocation());
// TODO add validation : maybe add a compilation pass that will validate the the method exist
// on the resource bundle
return ImmutableList.of((CssValueNode) cssDotPathNode);
}
@Override
public String getCallResultString(List<String> args) throws GssFunctionException {
String functionPath = args.get(0);
String prefix = null;
String suffix = null;
if (args.size() > 1) {
suffix = args.get(1);
}
if (args.size() > 2) {
prefix = args.get(2);
}
return CssDotPathNode.resolveExpression(null, functionPath, prefix, suffix);
}
@Override
public Integer getNumExpectedArguments() {
// number of arguments is variable
return null;
}
}