| // Copyright 2007, 2008, 2010 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.tapestry5.internal.services; |
| |
| import java.io.IOException; |
| |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.dom.Element; |
| import org.apache.tapestry5.internal.services.ajax.AjaxFormUpdateController; |
| import org.apache.tapestry5.json.JSONObject; |
| import org.apache.tapestry5.runtime.RenderCommand; |
| import org.apache.tapestry5.services.ComponentEventResultProcessor; |
| import org.apache.tapestry5.services.PartialMarkupRenderer; |
| import org.apache.tapestry5.services.PartialMarkupRendererFilter; |
| |
| /** |
| * Processor for objects that implement {@link RenderCommand} (such as |
| * {@link org.apache.tapestry5.internal.structure.BlockImpl}). |
| * |
| * @see AjaxPartialResponseRenderer#renderPartialPageMarkup() |
| */ |
| public class RenderCommandComponentEventResultProcessor implements ComponentEventResultProcessor<RenderCommand>, |
| PartialMarkupRendererFilter |
| { |
| private final PageRenderQueue pageRenderQueue; |
| |
| private final AjaxFormUpdateController ajaxFormUpdateController; |
| |
| public RenderCommandComponentEventResultProcessor(PageRenderQueue pageRenderQueue, |
| AjaxFormUpdateController ajaxFormUpdateController) |
| { |
| this.pageRenderQueue = pageRenderQueue; |
| this.ajaxFormUpdateController = ajaxFormUpdateController; |
| } |
| |
| public void processResultValue(final RenderCommand value) throws IOException |
| { |
| pageRenderQueue.addPartialMarkupRendererFilter(this); |
| pageRenderQueue.initializeForPartialPageRender(value); |
| } |
| |
| /** |
| * As a filter, this class does three things: |
| * <ul> |
| * <li>It creates an outer element to capture the partial page content that will be rendered</li> |
| * <li>It does setup and cleanup with the {@link AjaxFormUpdateController}</li> |
| * <li>It extracts the child markup and stuff it into the reply's "content" property.</li> |
| * </ul> |
| */ |
| public void renderMarkup(MarkupWriter writer, JSONObject reply, PartialMarkupRenderer renderer) |
| { |
| // The partial will quite often contain multiple elements (or just a block of plain text), |
| // so those must be enclosed in a root element. |
| |
| Element root = writer.element("ajax-partial"); |
| |
| ajaxFormUpdateController.setupBeforePartialZoneRender(writer); |
| |
| renderer.renderMarkup(writer, reply); |
| |
| ajaxFormUpdateController.cleanupAfterPartialZoneRender(); |
| |
| writer.end(); |
| |
| String content = root.getChildMarkup().trim(); |
| |
| reply.put("content", content); |
| } |
| } |