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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: MoveToResolveHandler.java 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.layouter.style.resolver.computed.content;
import org.jfree.layouting.LayoutProcess;
import org.jfree.layouting.input.style.StyleKey;
import org.jfree.layouting.input.style.keys.content.ContentStyleKeys;
import org.jfree.layouting.input.style.keys.content.MoveToValues;
import org.jfree.layouting.input.style.values.CSSStringType;
import org.jfree.layouting.input.style.values.CSSStringValue;
import org.jfree.layouting.input.style.values.CSSValue;
import org.jfree.layouting.layouter.content.ContentToken;
import org.jfree.layouting.layouter.content.computed.CounterToken;
import org.jfree.layouting.layouter.content.computed.CountersToken;
import org.jfree.layouting.layouter.content.resolved.ResolvedCounterToken;
import org.jfree.layouting.layouter.context.ContentSpecification;
import org.jfree.layouting.layouter.context.LayoutContext;
import org.jfree.layouting.layouter.model.LayoutElement;
import org.jfree.layouting.layouter.style.resolver.ResolveHandler;
public class MoveToResolveHandler implements ResolveHandler
{
public MoveToResolveHandler ()
{
}
/**
* This indirectly defines the resolve order. The higher the order, the more dependent
* is the resolver on other resolvers to be complete.
*
* @return the array of required style keys.
*/
public StyleKey[] getRequiredStyles ()
{
// no further dependecies. (We depend on the parent, not the current element)
return new StyleKey[0];
}
private boolean isCounterUsed (final LayoutElement element, final String counter)
{
final LayoutContext layoutContext = element.getLayoutContext();
final ContentSpecification contentSpecification =
layoutContext.getContentSpecification();
final ContentToken[] contents = contentSpecification.getContents();
for (int i = 0; i < contents.length; i++)
{
ContentToken content = contents[i];
if (content instanceof ResolvedCounterToken)
{
// this should not happen, as the resolving of content-tokens happens
// after the style resolving process ..
final ResolvedCounterToken computedToken = (ResolvedCounterToken) content;
content = computedToken.getParent();
}
if (content instanceof CounterToken)
{
final CounterToken counterToken = (CounterToken) content;
if (counterToken.getName().equals(counter))
{
return true;
}
}
else if (content instanceof CountersToken)
{
final CountersToken counterToken = (CountersToken) content;
if (counterToken.getName().equals(counter))
{
return true;
}
}
}
return false;
}
/**
* Resolves a single property.
*
* @param currentNode
* @param style
*/
public void resolve (final LayoutProcess process,
final LayoutElement currentNode,
final StyleKey key)
{
final LayoutContext layoutContext = currentNode.getLayoutContext();
final CSSValue value = layoutContext.getValue(ContentStyleKeys.MOVE_TO);
// Maybe this is a 'normal'.
if (MoveToValues.NORMAL.equals(value))
{
if ("alternate".equals(layoutContext.getPseudoElement()))
{
// For '::alternate' pseudo-elements, if the superior parent uses
// the 'footnote' counter in its 'content' property then the computed
// value of 'move-to' is 'footnotes'.
if (isCounterUsed(currentNode.getParent(), "footnote"))
{
layoutContext.setValue(ContentStyleKeys.MOVE_TO,
new CSSStringValue(CSSStringType.STRING, "footnotes"));
return;
}
// For '::alternate' pseudo-elements, if the superior parent uses
// the 'endnote' counter in its 'content' property then the computed
// value of 'move-to' is 'endnotes'.
if (isCounterUsed(currentNode.getParent(), "endnote"))
{
layoutContext.setValue(ContentStyleKeys.MOVE_TO,
new CSSStringValue(CSSStringType.STRING, "endnotes"));
return;
}
// For '::alternate' pseudo-elements, if the superior parent uses
// the 'section-note' counter in its 'content' property then the
// computed value of 'move-to' is 'section-notes'.
if (isCounterUsed(currentNode.getParent(), "section-note"))
{
layoutContext.setValue(ContentStyleKeys.MOVE_TO,
new CSSStringValue(CSSStringType.STRING, "section-notes"));
return;
}
}
layoutContext.setValue(ContentStyleKeys.MOVE_TO, MoveToValues.HERE);
}
}
}
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