Package org.apache.fop.layoutmgr

Examples of org.apache.fop.layoutmgr.LayoutContext

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        // the area width has already been adjusted, and it must remain unchanged
        // so save its value before calling addAreas, and set it again afterwards
        int savedIPD = ((InlineArea)holder).getIPD();
        // set to zero the ipd adjustment ratio, to avoid spaces in the pattern
        // to be modified
        LayoutContext childContext = new LayoutContext(context);
        childContext.setIPDAdjust(0.0);
        childLM.addAreas(posIter, childContext);
        ((InlineArea)holder).setIPD(savedIPD);
    }
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        getParentArea(null);

        addId();

        LayoutManager childLM;
        LayoutContext lc = new LayoutContext(0);
        LayoutManager firstLM = null;
        LayoutManager lastLM = null;
        Position firstPos = null;
        Position lastPos = null;

        // "unwrap" the NonLeafPositions stored in parentIter
        // and put them in a new list;
        LinkedList positionList = new LinkedList();
        Position pos;
        while (parentIter.hasNext()) {
            pos = (Position)parentIter.next();
            if (pos == null) {
                continue;
            }
            if (pos.getIndex() >= 0) {
                if (firstPos == null) {
                    firstPos = pos;
                }
                lastPos = pos;
            }
            if (pos instanceof NonLeafPosition) {
                // pos was created by a child of this ListBlockLM
                positionList.add(pos.getPosition());
                lastLM = pos.getPosition().getLM();
                if (firstLM == null) {
                    firstLM = lastLM;
                }
            } else if (pos instanceof SpaceHandlingBreakPosition) {
                positionList.add(pos);
            } else {
                // pos was created by this ListBlockLM, so it must be ignored
            }
        }

        addMarkersToPage(true, isFirst(firstPos), isLast(lastPos));

        StackingIter childPosIter = new StackingIter(positionList.listIterator());
        while ((childLM = childPosIter.getNextChildLM()) != null) {
            // Add the block areas to Area
            lc.setFlags(LayoutContext.FIRST_AREA, childLM == firstLM);
            lc.setFlags(LayoutContext.LAST_AREA, childLM == lastLM);
            // set the space adjustment ratio
            lc.setSpaceAdjust(layoutContext.getSpaceAdjust());
            lc.setStackLimitBP(layoutContext.getStackLimitBP());
            childLM.addAreas(childPosIter, lc);
        }

        addMarkersToPage(false, isFirst(firstPos), isLast(lastPos));
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        getPSLM().addIDToPage(getListBlockFO().getId());

        // the list block contains areas stacked from each list item

        LayoutManager childLM = null;
        LayoutContext lc = new LayoutContext(0);
        LayoutManager firstLM = null;
        LayoutManager lastLM = null;
        Position firstPos = null;
        Position lastPos = null;

        // "unwrap" the NonLeafPositions stored in parentIter
        // and put them in a new list;
        LinkedList positionList = new LinkedList();
        Position pos;
        while (parentIter.hasNext()) {
            pos = (Position)parentIter.next();
            if (pos.getIndex() >= 0) {
                if (firstPos == null) {
                    firstPos = pos;
                }
                lastPos = pos;
            }
            if (pos instanceof NonLeafPosition
                    && (pos.getPosition() != null)
                    && ((NonLeafPosition) pos).getPosition().getLM() != this) {
                // pos was created by a child of this ListBlockLM
                positionList.add(((NonLeafPosition) pos).getPosition());
                lastLM = ((NonLeafPosition) pos).getPosition().getLM();
                if (firstLM == null) {
                    firstLM = lastLM;
                }
            }
        }

        if (markers != null) {
            getCurrentPV().addMarkers(markers, true, isFirst(firstPos), isLast(lastPos));
        }

        StackingIter childPosIter = new StackingIter(positionList.listIterator());
        while ((childLM = childPosIter.getNextChildLM()) != null) {
            // Add the block areas to Area
            // set the space adjustment ratio
            lc.setSpaceAdjust(layoutContext.getSpaceAdjust());
            lc.setFlags(LayoutContext.FIRST_AREA, childLM == firstLM);
            lc.setFlags(LayoutContext.LAST_AREA, childLM == lastLM);
            lc.setStackLimit(layoutContext.getStackLimit());
            childLM.addAreas(childPosIter, lc);
        }

        if (markers != null) {
            getCurrentPV().addMarkers(markers, false, isFirst(firstPos), isLast(lastPos));
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    }
   
    /** @see org.apache.fop.layoutmgr.LayoutManager */
    public LinkedList getNextKnuthElements(LayoutContext context, int alignment) {
        referenceIPD = context.getRefIPD();
        LayoutContext childLC;
       
        LinkedList returnList = new LinkedList();
       
        if (!breakBeforeServed) {
            try {
                if (addKnuthElementsForBreakBefore(returnList, context)) {
                    return returnList;
                }
            } finally {
                breakBeforeServed = true;
            }
        }

        addKnuthElementsForSpaceBefore(returnList, alignment);
       
        addKnuthElementsForBorderPaddingBefore(returnList, !firstVisibleMarkServed);
        firstVisibleMarkServed = true;

        //Spaces, border and padding to be repeated at each break
        addPendingMarks(context);

        // label
        childLC = new LayoutContext(0);
        childLC.setRefIPD(context.getRefIPD());
        label.initialize();
        labelList = label.getNextKnuthElements(childLC, alignment);
       
        //Space resolution as if the contents were placed in a new reference area
        //(see 6.8.3, XSL 1.0, section on Constraints, last paragraph)
        SpaceResolver.resolveElementList(labelList);
        ElementListObserver.observe(labelList, "list-item-label", label.getPartFO().getId());
       
        if (childLC.isKeepWithPreviousPending()) {
            context.setFlags(LayoutContext.KEEP_WITH_PREVIOUS_PENDING);
        }
        this.keepWithNextPendingOnLabel = childLC.isKeepWithNextPending();

        // body
        childLC = new LayoutContext(0);
        childLC.setRefIPD(context.getRefIPD());
        body.initialize();
        bodyList = body.getNextKnuthElements(childLC, alignment);

        //Space resolution as if the contents were placed in a new reference area
        //(see 6.8.3, XSL 1.0, section on Constraints, last paragraph)
        SpaceResolver.resolveElementList(bodyList);
        ElementListObserver.observe(bodyList, "list-item-body", body.getPartFO().getId());
       
        if (childLC.isKeepWithPreviousPending()) {
            context.setFlags(LayoutContext.KEEP_WITH_PREVIOUS_PENDING);
        }
        this.keepWithNextPendingOnBody = childLC.isKeepWithNextPending();

        // create a combined list
        LinkedList returnedList = getCombinedKnuthElementsForListItem(labelList, bodyList, context);

        // "wrap" the Position inside each element
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                         LayoutContext layoutContext) {
        getParentArea(null);

        getPSLM().addIDToPage(getListItemFO().getId());

        LayoutContext lc = new LayoutContext(0);
        Position firstPos = null;
        Position lastPos = null;

        // "unwrap" the NonLeafPositions stored in parentIter
        LinkedList positionList = new LinkedList();
        Position pos;
        while (parentIter.hasNext()) {
            pos = (Position) parentIter.next();
            if (pos.getIndex() >= 0) {
                if (firstPos == null) {
                    firstPos = pos;
                }
                lastPos = pos;
            }
            if (pos instanceof NonLeafPosition && pos.getPosition() != null) {
                // pos contains a ListItemPosition created by this ListBlockLM
                positionList.add(((NonLeafPosition) pos).getPosition());
            }
        }

        if (markers != null) {
            getCurrentPV().addMarkers(markers, true, isFirst(firstPos), isLast(lastPos));
        }

        // use the first and the last ListItemPosition to determine the
        // corresponding indexes in the original labelList and bodyList
        int labelFirstIndex = ((ListItemPosition) positionList.getFirst()).getLabelFirstIndex();
        int labelLastIndex = ((ListItemPosition) positionList.getLast()).getLabelLastIndex();
        int bodyFirstIndex = ((ListItemPosition) positionList.getFirst()).getBodyFirstIndex();
        int bodyLastIndex = ((ListItemPosition) positionList.getLast()).getBodyLastIndex();

        //Determine previous break if any
        int previousBreak = ElementListUtils.determinePreviousBreak(labelList, labelFirstIndex);
        SpaceResolver.performConditionalsNotification(labelList,
                labelFirstIndex, labelLastIndex, previousBreak);

        //Determine previous break if any
        previousBreak = ElementListUtils.determinePreviousBreak(labelList, labelFirstIndex);
        SpaceResolver.performConditionalsNotification(bodyList,
                bodyFirstIndex, bodyLastIndex, previousBreak);
       
        // add label areas
        if (labelFirstIndex <= labelLastIndex) {
            KnuthPossPosIter labelIter = new KnuthPossPosIter(labelList,
                    labelFirstIndex, labelLastIndex + 1);
            lc.setFlags(LayoutContext.FIRST_AREA, layoutContext.isFirstArea());
            lc.setFlags(LayoutContext.LAST_AREA, layoutContext.isLastArea());
            // set the space adjustment ratio
            lc.setSpaceAdjust(layoutContext.getSpaceAdjust());
            // TO DO: use the right stack limit for the label
            lc.setStackLimit(layoutContext.getStackLimit());
            label.addAreas(labelIter, lc);
        }

        // reset the area bpd after adding the label areas and before adding the body areas
        int savedBPD = 0;
        if (labelFirstIndex <= labelLastIndex
            && bodyFirstIndex <= bodyLastIndex) {
            savedBPD = curBlockArea.getBPD();
            curBlockArea.setBPD(0);
        }

        // add body areas
        if (bodyFirstIndex <= bodyLastIndex) {
            KnuthPossPosIter bodyIter = new KnuthPossPosIter(bodyList,
                    bodyFirstIndex, bodyLastIndex + 1);
            lc.setFlags(LayoutContext.FIRST_AREA, layoutContext.isFirstArea());
            lc.setFlags(LayoutContext.LAST_AREA, layoutContext.isLastArea());
            // set the space adjustment ratio
            lc.setSpaceAdjust(layoutContext.getSpaceAdjust());
            // TO DO: use the right stack limit for the body
            lc.setStackLimit(layoutContext.getStackLimit());
            body.addAreas(bodyIter, lc);
        }

        // after adding body areas, set the maximum area bpd
        if (curBlockArea.getBPD() < savedBPD) {
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        getParentArea(null);
       
        getPSLM().addIDToPage(getPartFO().getId());

        LayoutManager childLM = null;
        LayoutContext lc = new LayoutContext(0);
        LayoutManager firstLM = null;
        LayoutManager lastLM = null;
        Position firstPos = null;
        Position lastPos = null;

        // "unwrap" the NonLeafPositions stored in parentIter
        // and put them in a new list;
        LinkedList positionList = new LinkedList();
        Position pos;
        while (parentIter.hasNext()) {
            pos = (Position)parentIter.next();
            if (pos == null) {
                continue;
            }
            if (pos.getIndex() >= 0) {
                if (firstPos == null) {
                    firstPos = pos;
                }
                lastPos = pos;
            }
            if (pos instanceof NonLeafPosition) {
                // pos was created by a child of this ListBlockLM
                positionList.add(((NonLeafPosition) pos).getPosition());
                lastLM = ((NonLeafPosition) pos).getPosition().getLM();
                if (firstLM == null) {
                    firstLM = lastLM;
                }
            } else {
                // pos was created by this ListBlockLM, so it must be ignored
            }
        }

        if (markers != null) {
            getCurrentPV().addMarkers(markers, true, isFirst(firstPos), isLast(lastPos));
        }
       
        StackingIter childPosIter = new StackingIter(positionList.listIterator());
        while ((childLM = childPosIter.getNextChildLM()) != null) {
            // Add the block areas to Area
            lc.setFlags(LayoutContext.FIRST_AREA, childLM == firstLM);
            lc.setFlags(LayoutContext.LAST_AREA, childLM == lastLM);
            // set the space adjustment ratio
            lc.setSpaceAdjust(layoutContext.getSpaceAdjust());
            lc.setStackLimit(layoutContext.getStackLimit());
            childLM.addAreas(childPosIter, lc);
        }

        if (markers != null) {
            getCurrentPV().addMarkers(markers, false, isFirst(firstPos), isLast(lastPos));
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    public void fillArea(LayoutManager curLM) {

        int ipd = 1000000;

        LayoutContext childLC = new LayoutContext(LayoutContext.NEW_AREA);
        childLC.setLeadingSpace(new SpaceSpecifier(false));
        childLC.setTrailingSpace(new SpaceSpecifier(false));
        // set stackLimit for lines
        childLC.setStackLimit(new MinOptMax(ipd));
        childLC.setRefIPD(ipd);

        int lineHeight = 14000;
        int lead = 12000;
        int follow = 2000;

        int halfLeading = (lineHeight - lead - follow) / 2;
        // height before baseline
        int lineLead = lead + halfLeading;
        // maximum size of top and bottom alignment
        int maxtb = follow + halfLeading;
        // max size of middle alignment below baseline
        int middlefollow = maxtb;

        stackSize = 0;

        LinkedList contentList =
            getNextKnuthElements(childLC, Constants.EN_START);
        ListIterator contentIter = contentList.listIterator();
        while (contentIter.hasNext()) {
            KnuthElement element = (KnuthElement) contentIter.next();
            if (element instanceof KnuthInlineBox) {
                KnuthInlineBox box = (KnuthInlineBox) element;
                // TODO handle alignment here?
            }
        }

        if (maxtb - lineLead > middlefollow) {
            middlefollow = maxtb - lineLead;
        }

        LayoutContext lc = new LayoutContext(0);

        lc.setFlags(LayoutContext.RESOLVE_LEADING_SPACE, true);
        lc.setLeadingSpace(new SpaceSpecifier(false));
        lc.setTrailingSpace(new SpaceSpecifier(false));
        KnuthPossPosIter contentPosIter =
            new KnuthPossPosIter(contentList, 0, contentList.size());
        curLM.addAreas(contentPosIter, lc);
    }
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        // the area width has already been adjusted, and it must remain unchanged
        // so save its value before calling addAreas, and set it again afterwards
        int savedIPD = ((InlineArea)holder).getIPD();
        // set to zero the ipd adjustment ratio, to avoid spaces in the pattern
        // to be modified
        LayoutContext childContext = new LayoutContext(context);
        childContext.setIPDAdjust(0.0);
        childLM.addAreas(posIter, childContext);
        ((InlineArea)holder).setIPD(savedIPD);
    }
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                                    , baselineShift
                                    , dominantBaseline
                                    , context.getAlignmentContext());
        }
       
        childLC = new LayoutContext(context);
        childLC.setAlignmentContext(alignmentContext);

        if (context.startsNewArea()) {
            // First call to this LM in new parent "area", but this may
            // not be the first area created by this inline
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        Position lastPos = null;
       
        addId();

        setChildContext(new LayoutContext(context)); // Store current value

        // If this LM has fence, make a new leading space specifier.
        if (hasLeadingFence(areaCreated)) {
            getContext().setLeadingSpace(new SpaceSpecifier(false));
            getContext().setFlags(LayoutContext.RESOLVE_LEADING_SPACE, true);
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Related Classes of org.apache.fop.layoutmgr.LayoutContext

  • org.apache.fop.layoutmgr.inline.ContentLayoutManager
  • org.apache.fop.layoutmgr.inline.FootnoteLayoutManager
  • org.apache.fop.layoutmgr.inline.InlineLayoutManager
  • org.apache.fop.layoutmgr.inline.LeaderLayoutManager
  • org.apache.fop.layoutmgr.inline.LineLayoutManager
  • org.apache.fop.layoutmgr.list.ListBlockLayoutManager
  • org.apache.fop.layoutmgr.list.ListItemContentLayoutManager
  • org.apache.fop.layoutmgr.list.ListItemLayoutManager
  • org.apache.fop.layoutmgr.table.RowGroupLayoutManager
  • org.apache.fop.layoutmgr.table.TableCellLayoutManager
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