/*
* Copyright 2008 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.parsers;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.uibinder.rebind.UiBinderWriter;
import com.google.gwt.uibinder.rebind.XMLElement;
import com.google.gwt.uibinder.rebind.messages.AttributeMessage;
import com.google.gwt.uibinder.rebind.messages.MessagesWriter;
/**
* Examines each element for child <ui:attr/> elements, and replaces the
* corresponding attributes of the examinee with references to the translatable
* messages created.
* <p>
* That is, when examining element foo in
* <pre>
* <foo bar="baz">
* <ui:attr name="baz">
* </foo></pre>
* cosume the ui:attr element, and declare a method on the Messages interface
* with {@literal @}Default("baz")
*/
class AttributeMessageInterpreter implements XMLElement.Interpreter<String> {
private final UiBinderWriter writer;
public AttributeMessageInterpreter(UiBinderWriter writer) {
this.writer = writer;
}
public String interpretElement(XMLElement elem)
throws UnableToCompleteException {
MessagesWriter messages = writer.getMessages();
for (AttributeMessage am : messages.consumeAttributeMessages(elem)) {
elem.setAttribute(am.getAttribute(),
writer.tokenForExpression(am.getMessageAsHtmlAttribute()));
}
/*
* Return null because we don't want to replace the dom element with any
* particular string (though we may have consumed its id or ui:field)
*/
return null;
}
}