/*
* 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.elementparsers;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.uibinder.rebind.UiBinderWriter;
import com.google.gwt.uibinder.rebind.XMLElement;
/**
* Generates fields to hold named dom elements (e.g. <div
* ui:field="importantDiv">)
*/
class FieldInterpreter implements XMLElement.Interpreter<String> {
private final String element;
private final UiBinderWriter writer;
public FieldInterpreter(UiBinderWriter writer, String ancestorExpression) {
this.writer = writer;
this.element = ancestorExpression;
}
public String interpretElement(XMLElement elem)
throws UnableToCompleteException {
String fieldName = writer.declareFieldIfNeeded(elem);
if (fieldName != null) {
String token = writer.declareDomField(elem, fieldName, element);
if (elem.hasAttribute("id")) {
writer.die(elem, String.format(
"Cannot declare id=\"%s\" and %s=\"%s\" on the same element",
elem.consumeRawAttribute("id"), writer.getUiFieldAttributeName(),
fieldName));
}
elem.setAttribute("id", token);
}
/*
* Return null because we don't want to replace the dom element with any
* particular string (though we may have consumed its id or gwt:field)
*/
return null;
}
}