| /* |
| * 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.gwt.resources.css; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.typeinfo.JClassType; |
| import com.google.gwt.core.ext.typeinfo.NotFoundException; |
| import com.google.gwt.resources.client.DataResource; |
| import com.google.gwt.resources.css.ast.Context; |
| import com.google.gwt.resources.css.ast.CssCompilerException; |
| import com.google.gwt.resources.css.ast.CssDef; |
| import com.google.gwt.resources.css.ast.CssProperty; |
| import com.google.gwt.resources.css.ast.CssUrl; |
| import com.google.gwt.resources.css.ast.CssVisitor; |
| import com.google.gwt.resources.css.ast.CssProperty.DotPathValue; |
| import com.google.gwt.resources.css.ast.CssProperty.ExpressionValue; |
| import com.google.gwt.resources.css.ast.CssProperty.IdentValue; |
| import com.google.gwt.resources.css.ast.CssProperty.ListValue; |
| import com.google.gwt.resources.css.ast.CssProperty.Value; |
| import com.google.gwt.resources.ext.ResourceContext; |
| import com.google.gwt.resources.ext.ResourceGeneratorUtil; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.Map; |
| |
| /** |
| * Substitute symbolic replacements into string values. |
| */ |
| public class SubstitutionReplacer extends CssVisitor { |
| private final ResourceContext context; |
| private final JClassType dataResourceType; |
| private final TreeLogger logger; |
| private final Map<String, CssDef> substitutions; |
| |
| public SubstitutionReplacer(TreeLogger logger, ResourceContext context, |
| Map<String, CssDef> substitutions) { |
| this.context = context; |
| this.dataResourceType = context.getGeneratorContext().getTypeOracle().findType( |
| DataResource.class.getCanonicalName()); |
| this.logger = logger; |
| this.substitutions = substitutions; |
| } |
| |
| @Override |
| public void endVisit(CssProperty x, Context ctx) { |
| if (x.getValues() == null) { |
| // Nothing to do |
| return; |
| } |
| |
| List<Value> values = new ArrayList<Value>(x.getValues().getValues()); |
| |
| for (ListIterator<Value> i = values.listIterator(); i.hasNext();) { |
| IdentValue v = i.next().isIdentValue(); |
| |
| if (v == null) { |
| // Don't try to substitute into anything other than idents |
| continue; |
| } |
| |
| String value = v.getIdent(); |
| CssDef def = substitutions.get(value); |
| |
| if (def == null) { |
| continue; |
| } else if (def instanceof CssUrl) { |
| assert def.getValues().size() == 1; |
| assert def.getValues().get(0).isDotPathValue() != null; |
| DotPathValue functionName = def.getValues().get(0).isDotPathValue(); |
| |
| try { |
| ResourceGeneratorUtil.getMethodByPath(context.getClientBundleType(), |
| functionName.getParts(), dataResourceType); |
| } catch (NotFoundException e) { |
| logger.log(TreeLogger.ERROR, e.getMessage()); |
| throw new CssCompilerException("Cannot find data method"); |
| } |
| |
| String instance = "((" + DataResource.class.getName() + ")(" |
| + context.getImplementationSimpleSourceName() + ".this." |
| + functionName.getExpression() + "))"; |
| |
| StringBuilder expression = new StringBuilder(); |
| expression.append("\"url('\" + "); |
| expression.append(instance).append(".getUrl()"); |
| expression.append(" + \"')\""); |
| i.set(new ExpressionValue(expression.toString())); |
| |
| } else { |
| i.remove(); |
| for (Value defValue : def.getValues()) { |
| i.add(defValue); |
| } |
| } |
| } |
| |
| x.setValue(new ListValue(values)); |
| } |
| } |