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/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: ChainingLayoutProcess.java 6489 2008-11-28 14:53:40Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting;
import org.jfree.layouting.input.style.PseudoPage;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.layouter.context.DocumentContext;
import org.jfree.layouting.layouter.feed.InputFeed;
import org.jfree.layouting.layouter.style.resolver.StyleResolver;
import org.jfree.layouting.normalizer.content.NormalizationException;
import org.jfree.layouting.normalizer.content.Normalizer;
import org.jfree.layouting.output.ChainingOutputProcessor;
import org.jfree.layouting.output.OutputProcessor;
import org.jfree.layouting.output.OutputProcessorMetaData;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
/**
* Creation-Date: 16.06.2006, 14:42:57
*
* @author Thomas Morgner
*/
public class ChainingLayoutProcess implements LayoutProcess
{
private static class ChainingLayoutProcessState implements LayoutProcessState
{
private LayoutProcessState chainedLayoutProcess;
private State inputFeed;
private ChainingLayoutProcessState()
{
}
public LayoutProcessState getChainedLayoutProcess()
{
return chainedLayoutProcess;
}
public void setChainedLayoutProcess(final LayoutProcessState chainedLayoutProcess)
{
this.chainedLayoutProcess = chainedLayoutProcess;
}
public State getInputFeed()
{
return inputFeed;
}
public void setInputFeed(final State inputFeed)
{
this.inputFeed = inputFeed;
}
public LayoutProcess restore(final OutputProcessor outputProcessor)
throws StateException
{
// Log.error ("START ++++++++++++++++++++++++++++++++++++++++++++++++ ");
final LayoutProcess root = chainedLayoutProcess.restore(outputProcessor);
final ChainingLayoutProcess proc = new ChainingLayoutProcess(root);
proc.outputProcessor = new ChainingOutputProcessor(outputProcessor);
if (inputFeed != null)
{
proc.inputFeed = (InputFeed) inputFeed.restore(proc);
if (proc.inputFeed == null)
{
throw new StateException();
}
}
// Log.error ("DONE ++++++++++++++++++++++++++++++++++++++++++++++++ ");
return proc;
}
}
private LayoutProcess chainedLayoutProcess;
private ChainingOutputProcessor outputProcessor;
private InputFeed inputFeed;
public ChainingLayoutProcess(final LayoutProcess layoutProcess)
{
this.chainedLayoutProcess = layoutProcess;
this.outputProcessor = new ChainingOutputProcessor
(layoutProcess.getOutputProcessor());
}
public InputFeed getInputFeed()
{
if (inputFeed == null)
{
inputFeed = outputProcessor.createInputFeed(this);
}
return inputFeed;
}
public StyleResolver getStyleResolver()
{
return chainedLayoutProcess.getStyleResolver();
}
/**
* The document context holds global information, like the used stylesheets.
* It also holds the caches for loading external contents.
*
* @return the document context.
*/
public DocumentContext getDocumentContext()
{
return chainedLayoutProcess.getDocumentContext();
}
public OutputProcessorMetaData getOutputMetaData()
{
return chainedLayoutProcess.getOutputMetaData();
}
public OutputProcessor getOutputProcessor()
{
return outputProcessor;
}
public ResourceManager getResourceManager()
{
return chainedLayoutProcess.getResourceManager();
}
public void pageBreakEncountered(final CSSValue pageName,
final PseudoPage[] pseudoPages)
throws NormalizationException
{
getInputFeed().handlePageBreakEncountered(pageName, pseudoPages);
}
/**
* A flag that indicates, whether one or more pagebreak have been encountered
* during the last operation. The flag does not necessarily state that the
* pagebreak(s) have been triggered by the last operation, it can as well be a
* delayed pagebreak indication due to caching or layouting effects (as it
* happens with pending or moved content).
*
* @return true, if a pagebreak as been encountered somewhere in the past,
* false otherwise.
*/
public boolean isPagebreakEncountered()
{
return getInputFeed().isPagebreakEncountered();
}
public LayoutProcess getChainedLayoutProcess()
{
return chainedLayoutProcess;
}
public void setChainedLayoutProcess(final LayoutProcess chainedLayoutProcess)
{
this.chainedLayoutProcess = chainedLayoutProcess;
}
public LayoutProcessState saveState() throws StateException
{
// Log.error ("SAVING ++++++++++++++++++++++++++++++++++++++++++++++++ ");
final ChainingLayoutProcessState state = new ChainingLayoutProcessState();
state.setInputFeed(inputFeed.saveState());
state.setChainedLayoutProcess(chainedLayoutProcess.saveState());
// Log.error ("DONE SAVING +++++++++++++++++++++++++++++++++++++++++++ ");
return state;
}
public Normalizer getNormalizer()
{
if (inputFeed == null)
{
throw new IllegalStateException
("We cant have come that far without an input feed.");
}
return inputFeed.getCurrentNormalizer();
}
}
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