| /* |
| * 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.XMLAttribute; |
| import com.google.gwt.uibinder.rebind.XMLElement; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Assigns computed values to element attributes, e.g. |
| * styleName={resources.style.pretty}, which will become something like |
| * myWidget.setStyleName(resources.style().pretty()) in the generated code. |
| */ |
| class ComputedAttributeInterpreter implements XMLElement.Interpreter<String> { |
| |
| interface Delegate { |
| String getAttributeToken(XMLAttribute attribute) |
| throws UnableToCompleteException; |
| } |
| |
| class DefaultDelegate implements Delegate { |
| public String getAttributeToken(XMLAttribute attribute) |
| throws UnableToCompleteException { |
| return writer.tokenForStringExpression(attribute.getElement(), attribute.consumeStringValue()); |
| } |
| } |
| |
| private final UiBinderWriter writer; |
| private final Delegate delegate; |
| |
| public ComputedAttributeInterpreter(UiBinderWriter writer) { |
| this.writer = writer; |
| this.delegate = new DefaultDelegate(); |
| } |
| |
| public ComputedAttributeInterpreter(UiBinderWriter writer, Delegate delegate) { |
| this.delegate = delegate; |
| this.writer = writer; |
| } |
| |
| public String interpretElement(XMLElement elem) |
| throws UnableToCompleteException { |
| Map<String, String> attNameToToken = new HashMap<String, String>(); |
| |
| for (int i = elem.getAttributeCount() - 1; i >= 0; i--) { |
| XMLAttribute att = elem.getAttribute(i); |
| |
| if (att.hasComputedValue()) { |
| String attToken = delegate.getAttributeToken(att); |
| attNameToToken.put(att.getName(), attToken); |
| } else { |
| /* |
| * No computed value, but make sure that any {{ madness gets escaped. |
| * TODO(rjrjr) Move this to XMLElement RSN |
| */ |
| String n = att.getName(); |
| String v = att.consumeRawValue().replace("\\{", "{"); |
| elem.setAttribute(n, v); |
| } |
| } |
| |
| for (Map.Entry<String, String> attr : attNameToToken.entrySet()) { |
| elem.setAttribute(attr.getKey(), attr.getValue()); |
| } |
| |
| // Return null because we don't want to replace the dom element |
| return null; |
| } |
| } |