/*
* 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.core.shared.impl.StringCase;
import com.google.gwt.uibinder.rebind.FieldWriter;
import com.google.gwt.uibinder.rebind.UiBinderWriter;
import com.google.gwt.uibinder.rebind.XMLElement;
import com.google.gwt.user.client.ui.HasHorizontalAlignment.HorizontalAlignmentConstant;
import com.google.gwt.user.client.ui.HasVerticalAlignment.VerticalAlignmentConstant;
/**
* 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";
/**
* 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
*/
protected static void parseCellAttributes(XMLElement cellElem, String fieldName,
FieldWriter childField, UiBinderWriter writer)
throws UnableToCompleteException {
JClassType hAlignConstantType = writer.getOracle().findType(
HorizontalAlignmentConstant.class.getCanonicalName());
JClassType vAlignConstantType = writer.getOracle().findType(
VerticalAlignmentConstant.class.getCanonicalName());
// Parse horizontal and vertical alignment attributes.
if (cellElem.hasAttribute(HALIGN_ATTR)) {
String value = cellElem.consumeAttribute(HALIGN_ATTR, hAlignConstantType);
writer.addStatement("%1$s.setCellHorizontalAlignment(%2$s, %3$s);",
fieldName, childField.getNextReference(), value);
}
if (cellElem.hasAttribute(VALIGN_ATTR)) {
String value = cellElem.consumeAttribute(VALIGN_ATTR, vAlignConstantType);
writer.addStatement("%1$s.setCellVerticalAlignment(%2$s, %3$s);",
fieldName, childField.getNextReference(), value);
}
// Parse width and height attributes.
if (cellElem.hasAttribute(WIDTH_ATTR)) {
String value = cellElem.consumeStringAttribute(WIDTH_ATTR);
writer.addStatement("%1$s.setCellWidth(%2$s, %3$s);", fieldName,
childField.getNextReference(), value);
}
if (cellElem.hasAttribute(HEIGHT_ATTR)) {
String value = cellElem.consumeStringAttribute(HEIGHT_ATTR);
writer.addStatement("%1$s.setCellHeight(%2$s, %3$s);", fieldName,
childField.getNextReference(), 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 != null && ns.equals(elem.getNamespaceUri())
&& localTagNameIsCell(tagName)) {
// It's a cell element, so parse its single child as a widget.
XMLElement widget = child.consumeSingleChildElement();
FieldWriter childField = writer.parseElementToField(widget);
writer.addStatement("%1$s.add(%2$s);", fieldName, childField.getNextReference());
// Parse the cell tag's alignment & size attributes.
parseCellAttributes(child, fieldName, childField, writer);
} else {
if (!writer.isWidgetElement(child)) {
writer.die(elem, "Expected a widget or <%s:%s>, found %s",
elem.getPrefix(), StringCase.toLower(CELL_TAG), child);
}
// It's just a normal child, so parse it as a widget.
FieldWriter childField = writer.parseElementToField(child);
writer.addStatement("%1$s.add(%2$s);", fieldName, childField.getNextReference());
}
}
}
private boolean localTagNameIsCell(String tagName) {
// Older templates had this as "Cell", but now we prefer "cell"
return tagName.equals(CELL_TAG) || tagName.equals(StringCase.toLower(CELL_TAG));
}
}