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/*
* $Id: StaticContentLayoutManager.java,v 1.13 2003/03/07 07:58:51 jeremias Exp $
* ============================================================================
* The Apache Software License, Version 1.1
* ============================================================================
*
* Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by the Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "FOP" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache", nor may
* "Apache" appear in their name, without prior written permission of the
* Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ============================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Apache Software Foundation and was originally created by
* James Tauber <jtauber@jtauber.com>. For more information on the Apache
* Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.layoutmgr;
import org.apache.fop.area.RegionReference;
import org.apache.fop.area.Area;
import org.apache.fop.area.Block;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* LayoutManager for an fo:flow object.
* Its parent LM is the PageLayoutManager.
* This LM is responsible for getting columns of the appropriate size
* and filling them with block-level areas generated by its children.
*/
public class StaticContentLayoutManager extends BlockStackingLayoutManager {
private RegionReference region;
private List blockBreaks = new ArrayList();
/**
* Sets the region reference
* @param region region reference
*/
public void setRegionReference(RegionReference region) {
this.region = region;
}
/**
* @see org.apache.fop.layoutmgr.LayoutProcessor#getNextBreakPoss(LayoutContext)
*/
public BreakPoss getNextBreakPoss(LayoutContext context) {
// currently active LM
LayoutProcessor curLM;
while ((curLM = getChildLM()) != null) {
// Make break positions and return page break
// Set up a LayoutContext
BreakPoss bp;
LayoutContext childLC = context;
if (!curLM.isFinished()) {
if ((bp = curLM.getNextBreakPoss(childLC)) != null) {
blockBreaks.add(bp);
if (bp.isForcedBreak()) {
getLogger().error("Forced breaks are not allowed in "
+ "static content - ignoring");
return null;
}
}
}
}
setFinished(true);
if (blockBreaks.size() > 0) {
return new BreakPoss(
new LeafPosition(this, blockBreaks.size() - 1));
}
return null;
}
/**
* @see org.apache.fop.layoutmgr.LayoutProcessor#addAreas(PositionIterator, LayoutContext)
*/
public void addAreas(PositionIterator parentIter, LayoutContext layoutContext) {
LayoutProcessor childLM;
int iStartPos = 0;
LayoutContext lc = new LayoutContext(0);
while (parentIter.hasNext()) {
LeafPosition lfp = (LeafPosition) parentIter.next();
// Add the block areas to Area
PositionIterator breakPosIter =
new BreakPossPosIter(blockBreaks, iStartPos,
lfp.getLeafPos() + 1);
iStartPos = lfp.getLeafPos() + 1;
while ((childLM = breakPosIter.getNextChildLM()) != null) {
childLM.addAreas(breakPosIter, lc);
}
}
blockBreaks.clear();
flush();
region = null;
}
/**
* Add child area to a the correct container, depending on its
* area class. A Flow can fill at most one area container of any class
* at any one time. The actual work is done by BlockStackingLM.
* @param childArea child area to add
*/
public void addChild(Area childArea) {
region.addBlock((Block)childArea);
}
/**
* @see org.apache.fop.layoutmgr.LayoutProcessor#getParentArea(Area)
*/
public Area getParentArea(Area childArea) {
return region;
}
/**
* Markers are not allowed in static areas so this reports an
* error and does nothing.
*
* @see org.apache.fop.layoutmgr.LayoutManager
*/
public void addMarker(Map marks, boolean start, boolean isfirst) {
// error markers not allowed in static
getLogger().error("Cannot add marker to static areas");
}
}
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