| // Copyright 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.ajax; |
| |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.ValidationTracker; |
| import org.apache.tapestry5.ValidationTrackerImpl; |
| import org.apache.tapestry5.corelib.components.Form; |
| import org.apache.tapestry5.corelib.internal.ComponentActionSink; |
| import org.apache.tapestry5.corelib.internal.HiddenFieldPositioner; |
| import org.apache.tapestry5.corelib.internal.InternalFormSupport; |
| import org.apache.tapestry5.internal.util.CaptureResultCallback; |
| import org.apache.tapestry5.ioc.ScopeConstants; |
| import org.apache.tapestry5.ioc.annotations.Scope; |
| import org.apache.tapestry5.ioc.util.IdAllocator; |
| import org.apache.tapestry5.runtime.Component; |
| import org.apache.tapestry5.services.ClientDataEncoder; |
| import org.apache.tapestry5.services.ComponentSource; |
| import org.apache.tapestry5.services.Environment; |
| import org.apache.tapestry5.services.FormSupport; |
| import org.apache.tapestry5.services.Heartbeat; |
| import org.apache.tapestry5.services.HiddenFieldLocationRules; |
| import org.slf4j.Logger; |
| |
| @Scope(ScopeConstants.PERTHREAD) |
| public class AjaxFormUpdateControllerImpl implements AjaxFormUpdateController |
| { |
| private final ComponentSource componentSource; |
| |
| private final HiddenFieldLocationRules rules; |
| |
| private final Environment environment; |
| |
| private final Heartbeat heartbeat; |
| |
| private final ClientDataEncoder clientDataEncoder; |
| |
| private final Logger logger; |
| |
| private String formComponentId; |
| |
| private String formClientId; |
| |
| private HiddenFieldPositioner hiddenFieldPositioner; |
| |
| private ComponentActionSink actionSink; |
| |
| private InternalFormSupport formSupport; |
| |
| public AjaxFormUpdateControllerImpl(ComponentSource componentSource, HiddenFieldLocationRules rules, |
| Environment environment, Heartbeat heartbeat, ClientDataEncoder clientDataEncoder, Logger logger) |
| { |
| this.componentSource = componentSource; |
| this.rules = rules; |
| this.environment = environment; |
| this.heartbeat = heartbeat; |
| this.clientDataEncoder = clientDataEncoder; |
| this.logger = logger; |
| } |
| |
| public void initializeForForm(String formComponentId, String formClientId) |
| { |
| this.formComponentId = formComponentId; |
| this.formClientId = formClientId; |
| } |
| |
| public void setupBeforePartialZoneRender(MarkupWriter writer) |
| { |
| if (formComponentId == null) |
| return; |
| |
| hiddenFieldPositioner = new HiddenFieldPositioner(writer, rules); |
| |
| actionSink = new ComponentActionSink(logger, clientDataEncoder); |
| |
| formSupport = createInternalFormSupport(formClientId, formComponentId, actionSink); |
| |
| environment.push(FormSupport.class, formSupport); |
| environment.push(ValidationTracker.class, new ValidationTrackerImpl()); |
| |
| heartbeat.begin(); |
| } |
| |
| public void cleanupAfterPartialZoneRender() |
| { |
| if (formComponentId == null) |
| return; |
| |
| heartbeat.end(); |
| |
| formSupport.executeDeferred(); |
| |
| environment.pop(ValidationTracker.class); |
| environment.pop(FormSupport.class); |
| |
| // If the Zone didn't actually contain any form control elements, then |
| // nothing will have been written to the action sink. In that case, |
| // get rid of the hidden field, if one was even added. |
| |
| if (actionSink.isEmpty()) |
| { |
| hiddenFieldPositioner.discard(); |
| |
| return; |
| } |
| |
| // We've collected some hidden data that needs to be placed inside the Zone. |
| // This will raise an exception if the content of the zone didn't provide such a position. |
| |
| hiddenFieldPositioner.getElement().attributes("type", "hidden", |
| |
| "name", Form.FORM_DATA, |
| |
| "value", actionSink.getClientData()); |
| } |
| |
| private InternalFormSupport createInternalFormSupport(String formClientId, String formComponentId, |
| ComponentActionSink actionSink) |
| { |
| // Kind of ugly, but the only way to ensure we don't have name collisions on the |
| // client side is to force a unique id into each name (as well as each id, but that's |
| // JavaScriptSupport's job). It would be nice if we could agree on the uid, but |
| // not essential. |
| |
| String uid = Long.toHexString(System.currentTimeMillis()); |
| |
| IdAllocator idAllocator = new IdAllocator("_" + uid); |
| |
| Component formComponent = componentSource.getComponent(formComponentId); |
| |
| CaptureResultCallback<InternalFormSupport> callback = CaptureResultCallback.create(); |
| |
| // This is a bit of a back-door to access a non-public method! |
| |
| formComponent.getComponentResources().triggerEvent("internalCreateRenderTimeFormSupport", new Object[] |
| { formClientId, actionSink, idAllocator }, callback); |
| |
| return callback.getResult(); |
| } |
| } |