| // Copyright 2007, 2008 The Apache Software Foundation |
| // |
| // 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 org.apache.tapestry.internal.util; |
| |
| import org.apache.tapestry.*; |
| |
| import java.util.Map; |
| |
| public class SelectModelRenderer implements SelectModelVisitor |
| { |
| private final MarkupWriter writer; |
| |
| private final ValueEncoder encoder; |
| |
| public SelectModelRenderer(final MarkupWriter writer, ValueEncoder encoder) |
| { |
| this.writer = writer; |
| this.encoder = encoder; |
| } |
| |
| public void beginOptionGroup(OptionGroupModel groupModel) |
| { |
| writer.element("optgroup", "label", groupModel.getLabel()); |
| |
| writeDisabled(groupModel.isDisabled()); |
| writeAttributes(groupModel.getAttributes()); |
| } |
| |
| public void endOptionGroup(OptionGroupModel groupModel) |
| { |
| writer.end(); // select |
| } |
| |
| @SuppressWarnings("unchecked") |
| public void option(OptionModel optionModel) |
| { |
| Object optionValue = optionModel.getValue(); |
| |
| String clientValue = encoder.toClient(optionValue); |
| |
| writer.element("option", "value", clientValue); |
| |
| if (isOptionSelected(optionModel, clientValue)) writer.attributes("selected", "selected"); |
| |
| writeDisabled(optionModel.isDisabled()); |
| writeAttributes(optionModel.getAttributes()); |
| |
| writer.write(optionModel.getLabel()); |
| |
| writer.end(); |
| } |
| |
| private void writeDisabled(boolean disabled) |
| { |
| if (disabled) writer.attributes("disabled", "disabled"); |
| } |
| |
| private void writeAttributes(Map<String, String> attributes) |
| { |
| if (attributes == null) return; |
| |
| for (Map.Entry<String, String> e : attributes.entrySet()) |
| writer.attributes(e.getKey(), e.getValue()); |
| } |
| |
| /** |
| * If true, then the selected attribute will be written. This implementation always returns false. |
| */ |
| protected boolean isOptionSelected(OptionModel optionModel, String clientValue) |
| { |
| return false; |
| } |
| |
| } |