| /* |
| * Copyright 2009 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.core.ext.typeinfo.JEnumType; |
| import com.google.gwt.dom.client.Style.Unit; |
| 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.TabLayoutPanel} widgets. |
| */ |
| public class TabLayoutPanelParser implements ElementParser { |
| |
| private static class Children { |
| XMLElement body; |
| XMLElement header; |
| XMLElement customHeader; |
| } |
| |
| private static final String CUSTOM = "customHeader"; |
| private static final String HEADER = "header"; |
| private static final String TAB = "tab"; |
| |
| public void parse(XMLElement panelElem, String fieldName, JClassType type, |
| UiBinderWriter writer) throws UnableToCompleteException { |
| // TabLayoutPanel requires tabBar size and unit ctor args. |
| |
| String size = panelElem.consumeRequiredDoubleAttribute("barHeight"); |
| |
| JEnumType unitEnumType = writer.getOracle().findType( |
| Unit.class.getCanonicalName()).isEnum(); |
| String unit = panelElem.consumeAttributeWithDefault("barUnit", |
| String.format("%s.%s", unitEnumType.getQualifiedSourceName(), "PX"), |
| unitEnumType); |
| |
| writer.setFieldInitializerAsConstructor(fieldName, size, unit); |
| |
| // Parse children. |
| for (XMLElement tabElem : panelElem.consumeChildElements()) { |
| // Get the tab element. |
| if (!isElementType(panelElem, tabElem, TAB)) { |
| writer.die(tabElem, "Only <%s:%s> children are allowed.", |
| panelElem.getPrefix(), TAB); |
| } |
| |
| // Find all the children of the <tab>. |
| Children children = findChildren(tabElem, writer); |
| |
| // Parse the child widget. |
| if (children.body == null) { |
| writer.die(tabElem, "Must have a child widget"); |
| } |
| if (!writer.isWidgetElement(children.body)) { |
| writer.die(children.body, "Must be a widget"); |
| } |
| FieldWriter childField = writer.parseElementToField(children.body); |
| |
| // Parse the header. |
| if (children.header != null) { |
| HtmlInterpreter htmlInt = HtmlInterpreter.newInterpreterForUiObject( |
| writer, fieldName); |
| String html = children.header.consumeInnerHtml(htmlInt); |
| writer.addStatement("%s.add(%s, %s, true);", fieldName, |
| childField.getNextReference(), |
| writer.declareTemplateCall(html, fieldName)); |
| } else if (children.customHeader != null) { |
| XMLElement headerElement = children.customHeader.consumeSingleChildElement(); |
| |
| if (!writer.isWidgetElement(headerElement)) { |
| writer.die(headerElement, "Is not a widget"); |
| } |
| |
| FieldWriter headerField = writer.parseElementToField(headerElement); |
| writer.addStatement("%s.add(%s, %s);", fieldName, |
| childField.getNextReference(), headerField.getNextReference()); |
| } else { |
| // Neither a header or customHeader. |
| writer.die(tabElem, "Requires either a <%1$s:%2$s> or <%1$s:%3$s>", |
| tabElem.getPrefix(), HEADER, CUSTOM); |
| } |
| } |
| } |
| |
| private Children findChildren(final XMLElement elem, |
| final UiBinderWriter writer) throws UnableToCompleteException { |
| final Children children = new Children(); |
| |
| elem.consumeChildElements(new XMLElement.Interpreter<Boolean>() { |
| public Boolean interpretElement(XMLElement child) |
| throws UnableToCompleteException { |
| |
| if (isElementType(elem, child, HEADER)) { |
| assertFirstHeader(); |
| children.header = child; |
| return true; |
| } |
| |
| if (isElementType(elem, child, CUSTOM)) { |
| assertFirstHeader(); |
| children.customHeader = child; |
| return true; |
| } |
| |
| // Must be the body, then |
| if (children.body != null) { |
| writer.die(children.body, "May have only one body element"); |
| } |
| |
| children.body = child; |
| return true; |
| } |
| |
| void assertFirstHeader() throws UnableToCompleteException { |
| if (children.header != null || children.customHeader != null) { |
| writer.die(elem, "May have only one <%1$s:header> " |
| + "or <%1$s:customHeader>", elem.getPrefix()); |
| } |
| } |
| }); |
| |
| return children; |
| } |
| |
| private boolean isElementType(XMLElement parent, XMLElement child, String type) { |
| return parent.getNamespaceUri().equals(child.getNamespaceUri()) |
| && type.equals(child.getLocalName()); |
| } |
| } |