/*
* =============================================================================
*
* Copyright (c) 2011-2016, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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.thymeleaf.engine;
import org.thymeleaf.context.IEngineContext;
/*
*
* @author Daniel Fernandez
* @since 3.0.0
*
*/
final class StandaloneElementTagModelProcessable implements IEngineProcessable {
private final StandaloneElementTag standaloneElementTag;
private final ProcessorExecutionVars vars;
private final IEngineContext context;
private final TemplateFlowController flowController;
private final TemplateModelController modelController;
private final ProcessorTemplateHandler processorTemplateHandler;
private final ITemplateHandler nextTemplateHandler;
private boolean beforeProcessed;
private boolean delegationProcessed;
private boolean afterProcessed;
private int offset;
StandaloneElementTagModelProcessable(
final StandaloneElementTag standaloneElementTag, final ProcessorExecutionVars vars, final IEngineContext context,
final TemplateModelController modelController, final TemplateFlowController flowController,
final ProcessorTemplateHandler processorTemplateHandler, final ITemplateHandler nextTemplateHandler) {
super();
this.standaloneElementTag = standaloneElementTag;
this.vars = vars;
this.context = context;
this.flowController = flowController;
this.modelController = modelController;
this.processorTemplateHandler = processorTemplateHandler;
this.nextTemplateHandler = nextTemplateHandler;
this.beforeProcessed = false;
this.delegationProcessed = false;
this.afterProcessed = false;
this.offset = 0;
}
public boolean process() {
/*
* First, check the stopProcess flag
*/
if (this.flowController.stopProcessing) {
return false;
}
if (!this.beforeProcessed) {
/*
* PROCESS THE QUEUE BEFORE DELEGATING, if specified to do so
*/
if (this.vars.modelBefore != null) {
this.offset += this.vars.modelBefore.process(this.nextTemplateHandler, this.offset, this.flowController); // This is never processable
if (this.offset < this.vars.modelBefore.queueSize || this.flowController.stopProcessing) {
return false;
}
}
this.beforeProcessed = true;
this.offset = 0;
}
if (!this.delegationProcessed) {
/*
* PROCESS THE REST OF THE HANDLER CHAIN and INCREASE THE MODEL LEVEL RIGHT AFTERWARDS
*/
if (!this.vars.discardEvent) {
this.nextTemplateHandler.handleStandaloneElement(this.standaloneElementTag);
}
this.delegationProcessed = true;
this.offset = 0;
}
if (this.flowController.stopProcessing) {
return false;
}
if (!this.afterProcessed) {
/*
* PROCESS THE QUEUE, launching all the queued events. Note executing the queue after increasing the model
* level makes sense even if what the queue contains is a replacement for the complete element (including open
* and close tags), because that way whatever comes in the queue will be encapsulated in a different model level
* and its internal open/close tags should not affect the correct delimitation of this block.
*/
if (this.vars.modelAfter != null) {
final ITemplateHandler modelHandler = this.vars.modelAfterProcessable ? this.processorTemplateHandler : this.nextTemplateHandler;
this.offset += this.vars.modelAfter.process(modelHandler, this.offset, this.flowController);
if (this.offset < this.vars.modelAfter.queueSize || this.flowController.stopProcessing) {
return false;
}
}
this.afterProcessed = true;
}
/*
* DECREASE THE CONTEXT LEVEL once we have executed all the processors (and maybe a body if we added
* one to the tag converting it into an open tag)
*/
if (this.context != null) {
this.context.decreaseLevel();
}
return true;
}
}