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- /*
- * $Id$
- * Copyright (C) 2002 The Apache Software Foundation. All rights reserved.
- * For details on use and redistribution please refer to the
- * LICENSE file included with these sources.
- */
-
- package org.apache.fop.layoutmgr.table;
-
- import org.apache.fop.layoutmgr.BlockStackingLayoutManager;
- import org.apache.fop.layoutmgr.LeafPosition;
- import org.apache.fop.layoutmgr.BreakPoss;
- import org.apache.fop.layoutmgr.LayoutContext;
- import org.apache.fop.layoutmgr.PositionIterator;
- import org.apache.fop.layoutmgr.BreakPossPosIter;
- import org.apache.fop.layoutmgr.Position;
- import org.apache.fop.fo.FObj;
- import org.apache.fop.area.Area;
- import org.apache.fop.area.Block;
- import org.apache.fop.area.MinOptMax;
-
- import java.util.ArrayList;
- import java.util.List;
-
- /**
- * LayoutManager for a table-header, table-footer and table body FO.
- * These fo objects have either rows or cells underneath.
- * Cells are organised into rows.
- */
- public class Body extends BlockStackingLayoutManager {
-
- private boolean rows = true;
- private List columns;
-
- private int yoffset;
- private int bodyHeight;
-
- private Block curBlockArea;
-
- private ArrayList childBreaks = new ArrayList();
-
- /**
- * Create a new body layout manager.
- *
- * @param fobj the formatting object that created this manager
- */
- public Body(FObj fobj) {
- super(fobj);
- }
-
- /**
- * Set the columns from the table.
- *
- * @param cols the list of columns used for this body
- */
- public void setColumns(List cols) {
- columns = cols;
- }
-
- /**
- * Breaks for this layout manager are of the form of before
- * or after a row and inside a row.
- *
- * @param context the layout context for finding the breaks
- * @return the next break possibility
- */
- public BreakPoss getNextBreakPoss(LayoutContext context) {
- Row curLM; // currently active LM
-
- MinOptMax stackSize = new MinOptMax();
- BreakPoss lastPos = null;
-
- while ((curLM = (Row)getChildLM()) != null) {
- // Make break positions
- // Set up a LayoutContext
- int ipd = context.getRefIPD();
- BreakPoss bp;
-
- LayoutContext childLC = new LayoutContext(0);
- childLC.setStackLimit(
- MinOptMax.subtract(context.getStackLimit(),
- stackSize));
- childLC.setRefIPD(ipd);
-
- curLM.setColumns(columns);
-
- while (!curLM.isFinished()) {
- if ((bp = curLM.getNextBreakPoss(childLC)) != null) {
- stackSize.add(bp.getStackingSize());
- if (stackSize.opt > context.getStackLimit().max) {
- // reset to last break
- if (lastPos != null) {
- reset(lastPos.getPosition());
- } else {
- curLM.resetPosition(null);
- }
- break;
- }
- lastPos = bp;
- childBreaks.add(bp);
-
- childLC.setStackLimit(MinOptMax.subtract(
- context.getStackLimit(), stackSize));
- }
- }
- BreakPoss breakPoss = new BreakPoss(
- new LeafPosition(this, childBreaks.size() - 1));
- breakPoss.setStackingSize(stackSize);
- return breakPoss;
- }
-
- setFinished(true);
- return null;
- }
-
- /**
- * Set the y offset of this body within the table.
- * This is used to set the row offsets.
- *
- * @param off the y offset position
- */
- public void setYOffset(int off) {
- yoffset = off;
- }
-
- /**
- * Add the areas for the break points.
- * This sets the offset of each row as it is added.
- *
- * @param parentIter the position iterator
- * @param layoutContext the layout context for adding areas
- */
- public void addAreas(PositionIterator parentIter,
- LayoutContext layoutContext) {
- getParentArea(null);
- addID();
-
- Row childLM;
- int iStartPos = 0;
- LayoutContext lc = new LayoutContext(0);
- int rowoffset = 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;
- int lastheight = 0;
- while ((childLM = (Row)breakPosIter.getNextChildLM()) != null) {
- childLM.setYOffset(yoffset + rowoffset);
- childLM.addAreas(breakPosIter, lc);
- lastheight = childLM.getRowHeight();
- }
- rowoffset += lastheight;
- }
- bodyHeight = rowoffset;
-
- flush();
-
- childBreaks.clear();
- curBlockArea = null;
- }
-
- /**
- * Get the body height of the body after adjusting.
- * Should only be called after adding the body areas.
- *
- * @return the body height of this body
- */
- public int getBodyHeight() {
- return bodyHeight;
- }
-
- /**
- * Return an Area which can contain the passed childArea. The childArea
- * may not yet have any content, but it has essential traits set.
- * In general, if the LayoutManager already has an Area it simply returns
- * it. Otherwise, it makes a new Area of the appropriate class.
- * It gets a parent area for its area by calling its parent LM.
- * Finally, based on the dimensions of the parent area, it initializes
- * its own area. This includes setting the content IPD and the maximum
- * BPD.
- *
- * @param childArea the child area
- * @return the parent are of the child
- */
- public Area getParentArea(Area childArea) {
- return parentLM.getParentArea(childArea);
- }
-
- /**
- * Add the child area.
- * The table-header, table-footer and table-body areas return
- * the areas return by the children.
- *
- * @param childArea the child area to add
- * @return unused
- */
- public boolean addChild(Area childArea) {
- return parentLM.addChild(childArea);
- }
-
- /**
- * Reset the position of the layout manager.
- *
- * @param resetPos the position to reset to
- */
- public void resetPosition(Position resetPos) {
- if (resetPos == null) {
- reset(null);
- }
- }
- }
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