| /* |
| * Copyright 2007 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.core.ext.typeinfo.JClassType; |
| import com.google.gwt.uibinder.rebind.FieldWriter; |
| import com.google.gwt.uibinder.rebind.UiBinderWriter; |
| import com.google.gwt.uibinder.rebind.XMLElement; |
| |
| /** |
| * Parses {@link com.google.gwt.user.client.ui.TabPanel} widgets. |
| */ |
| public class TabPanelParser implements ElementParser { |
| |
| private static final String TAG_TAB = "Tab"; |
| private static final String TAG_TABHTML = "TabHTML"; |
| |
| public void parse(XMLElement panelElem, String fieldName, JClassType type, |
| UiBinderWriter writer) throws UnableToCompleteException { |
| // Parse children. |
| for (XMLElement tabElem : panelElem.consumeChildElements()) { |
| // TabPanel can only contain Tab elements. |
| if (!isElementType(panelElem, tabElem, TAG_TAB)) { |
| writer.die(tabElem, "Only <%s:%s> children are allowed.", |
| panelElem.getPrefix(), TAG_TAB); |
| } |
| |
| // Get the caption, or null if there is none |
| String tabCaption = tabElem.consumeStringAttribute("text"); |
| |
| // Get the single required child widget. |
| String tabHTML = null; |
| FieldWriter childField = null; |
| for (XMLElement tabChild : tabElem.consumeChildElements()) { |
| if (tabChild.getLocalName().equals(TAG_TABHTML)) { |
| if (tabCaption != null || tabHTML != null) { |
| writer.die(tabElem, |
| "May have only one \"text\" attribute or <%1$s:%2$s>", |
| tabElem.getPrefix(), TAG_TABHTML); |
| } |
| HtmlInterpreter interpreter = HtmlInterpreter.newInterpreterForUiObject( |
| writer, fieldName); |
| tabHTML = tabChild.consumeInnerHtml(interpreter); |
| } else { |
| if (childField != null) { |
| writer.die(tabChild, "May only have a single child widget"); |
| } |
| if (!writer.isWidgetElement(tabChild)) { |
| writer.die(tabChild, "Must be a widget"); |
| } |
| childField = writer.parseElementToField(tabChild); |
| } |
| } |
| |
| if (childField == null) { |
| writer.die(tabElem, "Must have a child widget"); |
| } |
| if (tabHTML != null) { |
| writer.addStatement("%1$s.add(%2$s, %3$s, true);", fieldName, |
| childField.getNextReference(), |
| writer.declareTemplateCall(tabHTML, fieldName)); |
| } else if (tabCaption != null) { |
| writer.addStatement("%1$s.add(%2$s, %3$s);", fieldName, |
| childField.getNextReference(), tabCaption); |
| } else { |
| writer.die(tabElem, |
| "Requires either a \"text\" attribute or <%1$s:%2$s>", |
| tabElem.getPrefix(), TAG_TABHTML); |
| } |
| } |
| } |
| |
| private boolean isElementType(XMLElement parent, XMLElement child, String type) { |
| return parent.getNamespaceUri().equals(child.getNamespaceUri()) |
| && type.equals(child.getLocalName()); |
| } |
| } |