/**
* ===========================================
* 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: UpdateTokensStep.java 6653 2008-12-02 14:53:40Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.renderer.process;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.State;
import org.jfree.layouting.StateException;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.layouter.content.computed.ComputedToken;
import org.jfree.layouting.layouter.content.computed.CounterToken;
import org.jfree.layouting.layouter.content.computed.VariableToken;
import org.jfree.layouting.layouter.content.resolved.ResolvedCounterToken;
import org.jfree.layouting.layouter.content.resolved.ResolvedStringToken;
import org.jfree.layouting.layouter.content.resolved.ResolvedToken;
import org.jfree.layouting.layouter.context.DocumentContext;
import org.jfree.layouting.layouter.context.LayoutContext;
import org.jfree.layouting.layouter.counters.CounterStyle;
import org.jfree.layouting.renderer.model.InlineRenderBox;
import org.jfree.layouting.renderer.model.RenderNode;
import org.jfree.layouting.renderer.model.RenderableTextBox;
import org.jfree.layouting.renderer.model.page.LogicalPageBox;
import org.jfree.layouting.renderer.page.RenderPageContext;
import org.jfree.layouting.renderer.text.RenderableTextFactory;
import org.pentaho.reporting.libraries.fonts.encoding.CodePointBuffer;
import org.pentaho.reporting.libraries.fonts.encoding.manual.Utf16LE;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
/**
* Creation-Date: 29.11.2006, 21:56:47
*
* @author Thomas Morgner
*/
public class UpdateTokensStep extends IterateStructuralProcessStep
{
private LayoutProcess layoutProcess;
private RenderPageContext pageContext;
private DocumentContext documentContext;
private CodePointBuffer buffer;
public UpdateTokensStep()
{
}
public void compute(final LogicalPageBox pageBox,
final LayoutProcess layoutProcess,
final RenderPageContext pageContext)
{
this.layoutProcess = layoutProcess;
this.pageContext = pageContext;
this.documentContext = this.layoutProcess.getDocumentContext();
startProcessing(pageBox);
this.documentContext = null;
this.pageContext = null;
}
protected boolean startInlineBox(final InlineRenderBox box)
{
if (box instanceof RenderableTextBox)
{
final RenderableTextBox textBox = (RenderableTextBox) box;
final ResolvedToken resolvedToken = textBox.getResolvedToken();
final String resolvedText = resolveToken(resolvedToken);
if (ObjectUtilities.equal(textBox.getResolvedText(), resolvedText))
{
return false;
}
textBox.clear();
final State textFactory = textBox.getTextFactory();
try
{
final RenderableTextFactory rtf =
(RenderableTextFactory) textFactory.restore(layoutProcess);
final RenderNode[] text =
createText(resolvedText, textBox.getLayoutContext(), rtf);
for (int i = 0; i < text.length; i++)
{
textBox.addGeneratedChild(text[i]);
}
final RenderNode[] renderNodes = rtf.finishText();
for (int i = 0; i < renderNodes.length; i++)
{
textBox.addGeneratedChild(renderNodes[i]);
}
}
catch (StateException e)
{
// this should never happen ..
throw new IllegalStateException ("Failed to resolve token ");
}
return false;
}
return true;
}
private RenderNode[] createText(final String str,
final LayoutContext context,
final RenderableTextFactory textFactory)
{
if (buffer != null)
{
buffer.setCursor(0);
}
buffer = Utf16LE.getInstance().decodeString(str, buffer);
final int[] data = buffer.getBuffer();
return textFactory.createText(data, 0, buffer.getLength(), context);
}
protected String resolveToken(final ResolvedToken resolvedToken)
{
if (resolvedToken instanceof ResolvedStringToken)
{
final ResolvedStringToken stringToken =
(ResolvedStringToken) resolvedToken;
final ComputedToken parent = stringToken.getParent();
if (parent instanceof VariableToken)
{
final VariableToken vt = (VariableToken) parent;
final String variable = vt.getVariable();
final CSSValue stringPolicy = documentContext.getStringPolicy(variable);
return pageContext.getString(variable, stringPolicy);
}
}
else if (resolvedToken instanceof ResolvedCounterToken)
{
final ResolvedCounterToken ct = (ResolvedCounterToken) resolvedToken;
final CounterToken parent = ct.getParent();
final String name = parent.getName();
final CounterStyle style = parent.getStyle();
final CSSValue counterPolicy = documentContext.getCounterPolicy(name);
final Integer counterValue = pageContext.getCounter(name, counterPolicy);
return style.getCounterValue(counterValue.intValue());
}
return resolvedToken.getText();
}
}