| /* |
| * Copyright 2010 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.uibinder.elementparsers; |
| |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.uibinder.rebind.MortalLogger; |
| import com.google.gwt.uibinder.rebind.UiBinderWriter; |
| import com.google.gwt.uibinder.rebind.XMLAttribute; |
| import com.google.gwt.uibinder.rebind.XMLElement; |
| |
| /** |
| * Interprets generic message tags like: |
| * <b><ui:text from="{myMsg.message}" /></b>. It's called in both text |
| * and HTML contexts. |
| */ |
| public class UiTextInterpreter implements XMLElement.Interpreter<String> { |
| /** |
| * Used in {@link #interpretElement} to invoke the {@link ComputedAttributeInterpreter}. |
| */ |
| protected class Delegate implements ComputedAttributeInterpreter.Delegate { |
| public String getAttributeToken(XMLAttribute attribute) throws UnableToCompleteException { |
| return writer.tokenForStringExpression(attribute.getElement(), attribute.consumeStringValue()); |
| } |
| } |
| |
| protected final UiBinderWriter writer; |
| protected final ComputedAttributeInterpreter computedAttributeInterpreter; |
| private final MortalLogger logger; |
| |
| public UiTextInterpreter(UiBinderWriter writer) { |
| this.writer = writer; |
| this.logger = writer.getLogger(); |
| this.computedAttributeInterpreter = createComputedAttributeInterpreter(); |
| } |
| |
| public String interpretElement(XMLElement elem) |
| throws UnableToCompleteException { |
| // Must be in the format: <ui:string from="{myMsg.message}" /> |
| if (writer.isBinderElement(elem) && getLocalName().equals(elem.getLocalName())) { |
| if (!elem.hasAttribute("from")) { |
| logger.die(elem, "Attribute 'from' not found."); |
| } |
| if (!elem.getAttribute("from").hasComputedValue()) { |
| logger.die(elem, "Attribute 'from' does not have a computed value"); |
| } |
| // Make sure all computed attributes are interpreted first |
| computedAttributeInterpreter.interpretElement(elem); |
| |
| String fieldRef = elem.consumeStringAttribute("from"); |
| // Make sure that "from" was the only attribute |
| elem.assertNoAttributes(); |
| return "\" + " + fieldRef + " + \""; |
| } |
| return null; |
| } |
| |
| protected ComputedAttributeInterpreter createComputedAttributeInterpreter() { |
| return new ComputedAttributeInterpreter(writer); |
| } |
| |
| protected String getLocalName() { |
| return "text"; |
| } |
| } |