/*
* 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.parsers;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.uibinder.rebind.UiBinderWriter;
import com.google.gwt.uibinder.rebind.XMLElement;
/**
* Parses {@link com.google.gwt.user.client.ui.CellPanel} widgets.
*/
public class CellPanelParser implements ElementParser {
private static final String HALIGN_ATTR = "horizontalAlignment";
private static final String VALIGN_ATTR = "verticalAlignment";
private static final String WIDTH_ATTR = "width";
private static final String HEIGHT_ATTR = "height";
private static final String CELL_TAG = "Cell";
private static HorizontalAlignmentConstantParser halignParser =
new HorizontalAlignmentConstantParser();
private static VerticalAlignmentConstantParser valignParser =
new VerticalAlignmentConstantParser();
private static StringAttributeParser stringParser =
new StringAttributeParser();
/**
* Parses the alignment and size attributes common to all CellPanels.
*
* This is exposed publicly because there is a DockPanelParser that overrides
* the default behavior, but still needs to parse these attributes.
*
* @throws UnableToCompleteException
*/
public static void parseCellAttributes(XMLElement cellElem, String fieldName,
String childFieldName, UiBinderWriter writer) throws UnableToCompleteException {
// Parse horizontal and vertical alignment attributes.
if (cellElem.hasAttribute(HALIGN_ATTR)) {
String value =
halignParser.parse(cellElem.consumeAttribute(HALIGN_ATTR), writer);
writer.addStatement("%1$s.setCellHorizontalAlignment(%2$s, %3$s);", fieldName,
childFieldName, value);
}
if (cellElem.hasAttribute(VALIGN_ATTR)) {
String value =
valignParser.parse(cellElem.consumeAttribute(VALIGN_ATTR), writer);
writer.addStatement("%1$s.setCellVerticalAlignment(%2$s, %3$s);", fieldName,
childFieldName, value);
}
// Parse width and height attributes.
if (cellElem.hasAttribute(WIDTH_ATTR)) {
String value =
stringParser.parse(cellElem.consumeAttribute(WIDTH_ATTR), writer);
writer.addStatement("%1$s.setCellWidth(%2$s, %3$s);", fieldName, childFieldName,
value);
}
if (cellElem.hasAttribute(HEIGHT_ATTR)) {
String value =
stringParser.parse(cellElem.consumeAttribute(HEIGHT_ATTR), writer);
writer.addStatement("%1$s.setCellHeight(%2$s, %3$s);", fieldName, childFieldName,
value);
}
}
public void parse(XMLElement elem, String fieldName, JClassType type,
UiBinderWriter writer) throws UnableToCompleteException {
for (XMLElement child : elem.consumeChildElements()) {
String ns = child.getNamespaceUri();
String tagName = child.getLocalName();
if (ns.equals(elem.getNamespaceUri()) && tagName.equals(CELL_TAG)) {
// It's a cell element, so parse its single child as a widget.
XMLElement widget = child.consumeSingleChildElement();
if (widget == null) {
writer.die("Cell must contain a single child widget");
}
String childFieldName = writer.parseElementToField(widget);
writer.addStatement("%1$s.add(%2$s);", fieldName, childFieldName);
// Parse the cell tag's alignment & size attributes.
parseCellAttributes(child, fieldName, childFieldName, writer);
} else {
// It's just a normal child, so parse it as a widget.
String childFieldName = writer.parseElementToField(child);
writer.addStatement("%1$s.add(%2$s);", fieldName, childFieldName);
}
}
}
}