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- /*
- * $Id: BlockContainerLayoutManager.java,v 1.13 2003/03/05 20:38:26 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 java.util.List;
- import java.awt.geom.Rectangle2D;
-
- import org.apache.fop.area.Area;
- import org.apache.fop.area.BlockViewport;
- import org.apache.fop.area.Block;
- import org.apache.fop.fo.PropertyManager;
- import org.apache.fop.fo.properties.CommonAbsolutePosition;
- import org.apache.fop.fo.properties.CommonBorderAndPadding;
- import org.apache.fop.fo.properties.CommonMarginBlock;
- import org.apache.fop.fo.PropertyList;
- import org.apache.fop.area.CTM;
- import org.apache.fop.datatypes.FODimension;
- import org.apache.fop.datatypes.Length;
- import org.apache.fop.datatypes.PercentBase;
- import org.apache.fop.traits.MinOptMax;
-
- /**
- * LayoutManager for a block FO.
- */
- public class BlockContainerLayoutManager extends BlockStackingLayoutManager {
-
- private BlockViewport viewportBlockArea;
- private Block curBlockArea;
-
- private List childBreaks = new java.util.ArrayList();
-
- private CommonAbsolutePosition abProps;
- private CommonBorderAndPadding borderProps;
- private CommonMarginBlock marginProps;
- private FODimension relDims;
- private CTM absoluteCTM;
- private boolean clip = false;
- private int overflow;
- private PropertyManager propManager;
- private Length width;
- private Length height;
-
- // When viewport should grow with the content.
- private boolean autoHeight = true;
-
- /**
- * Create a new block container layout manager.
- */
- public BlockContainerLayoutManager() {
- }
-
- public void setOverflow(int of) {
- overflow = of;
- }
-
- protected void initProperties(PropertyManager pm) {
- propManager = pm;
-
- abProps = pm.getAbsolutePositionProps();
- if (abProps.absolutePosition == AbsolutePosition.ABSOLUTE) {
- Rectangle2D rect = new Rectangle2D.Double(abProps.left,
- abProps.top, abProps.right - abProps.left,
- abProps.bottom - abProps.top);
- relDims = new FODimension(0, 0);
- absoluteCTM = CTM.getCTMandRelDims(pm.getAbsRefOrient(),
- pm.getWritingMode(), rect, relDims);
- }
- marginProps = pm.getMarginProps();
- borderProps = pm.getBorderAndPadding();
- height = pm.getPropertyList().get(PR_BLOCK_PROGRESSION_DIMENSION | CP_OPTIMUM).getLength();
- width = pm.getPropertyList().get(PR_INLINE_PROGRESSION_DIMENSION | CP_OPTIMUM).getLength();
- }
-
- protected int getRotatedIPD() {
- PropertyList props = propManager.getPropertyList();
- int height = props.get(PR_HEIGHT).getLength().getValue();
- height = props.get(PR_INLINE_PROGRESSION_DIMENSION | CP_OPTIMUM).getLength().getValue();
-
- return height;
- }
-
- public BreakPoss getNextBreakPoss(LayoutContext context) {
-
- if (abProps.absolutePosition == AbsolutePosition.ABSOLUTE) {
- return getAbsoluteBreakPoss(context);
- }
-
- int bIndents = borderProps.getBPPaddingAndBorder(false);
- int iIndents = marginProps.startIndent + marginProps.endIndent;
-
- int ipd = context.getRefIPD();
- int bpd = context.getStackLimit().opt;
- if (!width.isAuto()) {
- ipd = width.getValue() + iIndents;
- }
- if (!height.isAuto()) {
- bpd = height.getValue() + bIndents;
- }
- Rectangle2D rect = new Rectangle2D.Double(0, 0, ipd, bpd);
- relDims = new FODimension(0, 0);
- absoluteCTM = CTM.getCTMandRelDims(propManager.getAbsRefOrient(),
- propManager.getWritingMode(), rect, relDims);
- double[] vals = absoluteCTM.toArray();
-
- ipd -= iIndents;
-
- MinOptMax stackLimit;
- boolean rotated = vals[0] == 0.0;
- if (rotated) {
- // rotated 90 degrees
- if (relDims.ipd > context.getRefIPD()) {
- relDims.ipd = context.getRefIPD();
- }
- stackLimit = new MinOptMax(relDims.ipd);
- if (width.isAuto()) {
- relDims.bpd = context.getStackLimit().opt;
- }
- absoluteCTM = new CTM(vals[0], vals[1], vals[2], vals[3], 0, 0);
- } else {
- if (vals[0] == -1.0) {
- absoluteCTM = new CTM(vals[0], vals[1], vals[2], vals[3], 0, 0);
- }
- stackLimit = context.getStackLimit();
- }
-
- LayoutProcessor curLM ; // currently active LM
-
- MinOptMax stackSize = new MinOptMax();
- // if starting add space before
- // stackSize.add(spaceBefore);
- BreakPoss lastPos = null;
-
- fobj.setLayoutDimension(PercentBase.BLOCK_IPD, ipd);
- fobj.setLayoutDimension(PercentBase.BLOCK_BPD, bpd - bIndents);
- fobj.setLayoutDimension(PercentBase.REFERENCE_AREA_IPD, ipd);
- fobj.setLayoutDimension(PercentBase.REFERENCE_AREA_BPD, bpd - bIndents);
-
- while ((curLM = getChildLM()) != null) {
- // Make break positions and return blocks!
- // Set up a LayoutContext
- BreakPoss bp;
-
- LayoutContext childLC = new LayoutContext(0);
- childLC.setStackLimit(
- MinOptMax.subtract(stackLimit,
- stackSize));
- childLC.setRefIPD(ipd);
-
- boolean over = false;
- while (!curLM.isFinished()) {
- if ((bp = curLM.getNextBreakPoss(childLC)) != null) {
- stackSize.add(bp.getStackingSize());
- if (stackSize.opt > stackLimit.max) {
- // reset to last break
- if (lastPos != null) {
- reset(lastPos.getPosition());
- } else {
- curLM.resetPosition(null);
- }
- over = true;
- break;
- }
- lastPos = bp;
- childBreaks.add(bp);
-
- if (bp.nextBreakOverflows()) {
- over = true;
- break;
- }
-
- childLC.setStackLimit(MinOptMax.subtract(
- stackLimit, stackSize));
- }
- }
- if (!rotated) {
- BreakPoss breakPoss;
- breakPoss = new BreakPoss(new LeafPosition(this,
- childBreaks.size() - 1));
- breakPoss.setStackingSize(stackSize);
- if (over) {
- breakPoss.setFlag(BreakPoss.NEXT_OVERFLOWS, true);
- }
- return breakPoss;
- }
- }
- setFinished(true);
- if (rotated) {
- BreakPoss breakPoss;
- breakPoss = new BreakPoss(new LeafPosition(this,
- childBreaks.size() - 1));
- breakPoss.setStackingSize(new MinOptMax(ipd));
- return breakPoss;
- }
- return null;
- }
-
- public BreakPoss getAbsoluteBreakPoss(LayoutContext context) {
-
- LayoutProcessor curLM ; // currently active LM
-
- MinOptMax stackSize = new MinOptMax();
-
- int ipd = relDims.ipd;
-
- while ((curLM = getChildLM()) != null) {
- // Make break positions and return blocks!
- // Set up a LayoutContext
- BreakPoss bp;
-
- LayoutContext childLC = new LayoutContext(0);
- childLC.setStackLimit(new MinOptMax(1000000));
- childLC.setRefIPD(ipd);
-
- while (!curLM.isFinished()) {
- if ((bp = curLM.getNextBreakPoss(childLC)) != null) {
- stackSize.add(bp.getStackingSize());
- childBreaks.add(bp);
- }
- }
- }
- setFinished(true);
- BreakPoss breakPoss = new BreakPoss(
- new LeafPosition(this, childBreaks.size() - 1));
- // absolutely positioned areas do not contribute
- // to the normal stacking
- breakPoss.setStackingSize(new MinOptMax(0));
-
- if (stackSize.opt > relDims.bpd) {
- if (overflow == Overflow.HIDDEN) {
- clip = true;
- } else if (overflow == Overflow.ERROR_IF_OVERFLOW) {
- getLogger().error("contents overflows block-container viewport: clipping");
- clip = true;
- }
- }
-
- return breakPoss;
- }
-
- public void addAreas(PositionIterator parentIter,
- LayoutContext layoutContext) {
- getParentArea(null);
-
- addID();
- addMarkers(true, true);
-
- 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(childBreaks, iStartPos,
- lfp.getLeafPos() + 1);
- iStartPos = lfp.getLeafPos() + 1;
- while ((childLM = breakPosIter.getNextChildLM()) != null) {
- childLM.addAreas(breakPosIter, lc);
- }
- }
-
- flush();
- addMarkers(true, true);
-
- childBreaks.clear();
- viewportBlockArea = null;
- curBlockArea = null;
- }
-
- /**
- * Get the parent area for children of this block container.
- * This returns the current block container area
- * and creates it if required.
- *
- * @see org.apache.fop.layoutmgr.LayoutProcessor#getParentArea(Area)
- */
- public Area getParentArea(Area childArea) {
- if (curBlockArea == null) {
- viewportBlockArea = new BlockViewport();
- TraitSetter.addBorders(viewportBlockArea,
- propManager.getBorderAndPadding());
- TraitSetter.addBackground(viewportBlockArea,
- propManager.getBackgroundProps());
-
- if (abProps.absolutePosition == AbsolutePosition.ABSOLUTE) {
- viewportBlockArea.setXOffset(abProps.left);
- viewportBlockArea.setYOffset(abProps.top);
- viewportBlockArea.setWidth(abProps.right - abProps.left);
- viewportBlockArea.setHeight(abProps.bottom - abProps.top);
-
- viewportBlockArea.setCTM(absoluteCTM);
- viewportBlockArea.setClip(clip);
- autoHeight = false;
- } else {
- double[] vals = absoluteCTM.toArray();
- boolean rotated = vals[0] == 0.0;
- if (rotated) {
- viewportBlockArea.setWidth(relDims.ipd);
- viewportBlockArea.setHeight(relDims.bpd);
- viewportBlockArea.setCTM(absoluteCTM);
- viewportBlockArea.setClip(clip);
- autoHeight = false;
- } else if (vals[0] == -1.0) {
- // need to set bpd to actual size for rotation
- // and stacking
- viewportBlockArea.setWidth(relDims.ipd);
- if (!height.isAuto()) {
- viewportBlockArea.setHeight(relDims.bpd);
- autoHeight = false;
- }
- viewportBlockArea.setCTM(absoluteCTM);
- viewportBlockArea.setClip(clip);
- } else {
- viewportBlockArea.setWidth(relDims.ipd);
- if (!height.isAuto()) {
- viewportBlockArea.setHeight(relDims.bpd);
- autoHeight = false;
- }
- }
- }
-
- curBlockArea = new Block();
-
- if (abProps.absolutePosition == AbsolutePosition.ABSOLUTE) {
- viewportBlockArea.setPositioning(Block.ABSOLUTE);
- }
-
- // Set up dimensions
- // Must get dimensions from parent area
- Area parentArea = parentLM.getParentArea(curBlockArea);
- //int referenceIPD = parentArea.getIPD();
- curBlockArea.setIPD(relDims.ipd);
- // Get reference IPD from parentArea
- setCurrentArea(viewportBlockArea); // ??? for generic operations
- }
- return curBlockArea;
- }
-
- /**
- * Add the child to the block container.
- *
- * @see org.apache.fop.layoutmgr.LayoutProcessor#addChild(Area)
- */
- public void addChild(Area childArea) {
- if (curBlockArea != null) {
- curBlockArea.addBlock((Block) childArea);
- }
- }
-
- public void resetPosition(Position resetPos) {
- if (resetPos == null) {
- reset(null);
- }
- }
-
- /*
- * Force current area to be added to parent area.
- */
- protected void flush() {
- viewportBlockArea.addBlock(curBlockArea, autoHeight);
-
- // Fake a 0 height for absolute positioned blocks.
- int height = viewportBlockArea.getHeight();
- if (viewportBlockArea.getPositioning() == Block.ABSOLUTE) {
- viewportBlockArea.setHeight(0);
- }
- super.flush();
- // Restore the right height.
- if (viewportBlockArea.getPositioning() == Block.ABSOLUTE) {
- viewportBlockArea.setHeight(height);
- }
- }
-
- }
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