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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.layoutmgr.table;
-
- import org.apache.fop.area.Area;
- import org.apache.fop.area.Block;
- import org.apache.fop.fo.flow.table.TableAndCaption;
- import org.apache.fop.layoutmgr.BlockStackingLayoutManager;
- import org.apache.fop.layoutmgr.Keep;
- import org.apache.fop.layoutmgr.LayoutContext;
- import org.apache.fop.layoutmgr.PositionIterator;
-
- /**
- * LayoutManager for a table-and-caption FO.
- * A table and caption consists of a table and a caption.
- * The caption contains blocks that are positioned next to the
- * table on the caption side.
- * The caption blocks have an implicit keep with the table.
- * @todo Implement getNextKnuthElements()
- */
- public class TableAndCaptionLayoutManager extends BlockStackingLayoutManager {
-
- private Block curBlockArea;
-
- //private List childBreaks = new java.util.ArrayList();
-
- /**
- * Create a new table and caption layout manager.
- * @param node table-and-caption FO
- */
- public TableAndCaptionLayoutManager(TableAndCaption node) {
- super(node);
- }
-
- /**
- * Returns the table-and-caption formatting object.
- * @return the table-and-caption formatting object
- */
- public TableAndCaption getTableAndCaptionFO() {
- return (TableAndCaption)this.fobj;
- }
-
- /**
- * Get the next break possibility.
- *
- * @param context the layout context for getting breaks
- * @return the next break possibility
- */
- /*
- public BreakPoss getNextBreakPoss(LayoutContext context) {
- LayoutManager curLM; // currently active LM
-
- MinOptMax stackSize = new MinOptMax();
- // if starting add space before
- // stackSize.add(spaceBefore);
- BreakPoss lastPos = null;
-
- // if there is a caption then get the side and work out when
- // to handle it
-
- while ((curLM = getChildLM()) != null) {
- // Make break positions and return blocks!
- // Set up a LayoutContext
- int ipd = context.getRefIPD();
- BreakPoss bp;
-
- LayoutContext childLC = new LayoutContext(0);
- // if line layout manager then set stack limit to ipd
- // line LM actually generates a LineArea which is a block
- childLC.setStackLimit(
- MinOptMax.subtract(context.getStackLimit(),
- stackSize));
- childLC.setRefIPD(ipd);
-
- boolean over = false;
- while (!curLM.isFinished()) {
- if ((bp = curLM.getNextBreakPoss(childLC)) != null) {
- if (stackSize.opt + bp.getStackingSize().opt > context.getStackLimit().max) {
- // reset to last break
- if (lastPos != null) {
- LayoutManager lm = lastPos.getLayoutManager();
- lm.resetPosition(lastPos.getPosition());
- if (lm != curLM) {
- curLM.resetPosition(null);
- }
- } else {
- curLM.resetPosition(null);
- }
- over = true;
- break;
- }
- stackSize.add(bp.getStackingSize());
- lastPos = bp;
- childBreaks.add(bp);
-
- if (bp.nextBreakOverflows()) {
- over = true;
- break;
- }
-
- childLC.setStackLimit(MinOptMax.subtract(
- context.getStackLimit(), stackSize));
- }
- }
- BreakPoss breakPoss = new BreakPoss(
- new LeafPosition(this, childBreaks.size() - 1));
- if (over) {
- breakPoss.setFlag(BreakPoss.NEXT_OVERFLOWS, true);
- }
- breakPoss.setStackingSize(stackSize);
- return breakPoss;
- }
- setFinished(true);
- return null;
- }*/
-
- /**
- * Add the areas.
- *
- * @param parentIter the position iterator
- * @param layoutContext the layout context for adding areas
- */
- public void addAreas(PositionIterator parentIter,
- LayoutContext layoutContext) {
- getParentArea(null);
- addId();
-
- /* TODO: Reimplement using Knuth approach
- LayoutManager 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();
-
- //childBreaks.clear();
- curBlockArea = null;
- }
-
- /**
- * 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 to locate the parent
- * @return the area for this table and caption
- */
- public Area getParentArea(Area childArea) {
- if (curBlockArea == null) {
- curBlockArea = new Block();
- // Set up dimensions
- // Must get dimensions from parent area
- Area parentArea = parentLM.getParentArea(curBlockArea);
- int referenceIPD = parentArea.getIPD();
- curBlockArea.setIPD(referenceIPD);
- // Get reference IPD from parentArea
- setCurrentArea(curBlockArea); // ??? for generic operations
- }
- return curBlockArea;
- }
-
- /**
- * Add the child to the current area.
- *
- * @param childArea the area to add
- */
- public void addChildArea(Area childArea) {
- if (curBlockArea != null) {
- curBlockArea.addBlock((Block) childArea);
- }
- }
-
- /** {@inheritDoc} */
- public Keep getKeepWithNext() {
- return Keep.KEEP_AUTO;
- /* TODO Complete me!
- return KeepUtil.getCombinedBlockLevelKeepStrength(
- getTableAndCaptionFO().getKeepWithNext());
- */
- }
-
- /** {@inheritDoc} */
- public Keep getKeepWithPrevious() {
- return Keep.KEEP_AUTO;
- /* TODO Complete me!
- return KeepUtil.getCombinedBlockLevelKeepStrength(
- getTableAndCaptionFO().getKeepWithPrevious());
- */
- }
-
- }
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