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- /*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed 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;
-
- import org.apache.fop.fo.FObj;
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.fo.flow.Marker;
- import org.apache.fop.area.Area;
- import org.apache.fop.area.Resolveable;
- import org.apache.fop.area.PageViewport;
-
- import org.apache.avalon.framework.logger.Logger;
-
- import java.util.List;
- import java.util.Map;
- import java.util.ArrayList;
- import org.apache.fop.traits.MinOptMax;
-
- /**
- * Content Layout Manager.
- * For use with objects that contain inline areas such as
- * leader use-content and title.
- */
- public class ContentLayoutManager implements LayoutProcessor {
- private FOUserAgent userAgent;
- private Area holder;
- private int stackSize;
- private LayoutProcessor parentLM;
-
- /**
- * Constructs a new ContentLayoutManager
- *
- * @param area The parent area
- */
- public ContentLayoutManager(Area area) {
- holder = area;
- }
-
- /**
- * Set the FO object for this layout manager
- *
- * @param fo the fo for this layout manager
- */
- public void setFObj(FObj fo) {
- }
-
- public void fillArea(LayoutProcessor curLM) {
-
- List childBreaks = new ArrayList();
- MinOptMax stack = new MinOptMax();
- int ipd = 1000000;
- BreakPoss bp;
-
- 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;
-
- while (!curLM.isFinished()) {
- MinOptMax lastSize = null;
- if ((bp = curLM.getNextBreakPoss(childLC)) != null) {
- lastSize = bp.getStackingSize();
- childBreaks.add(bp);
-
- if (bp.getLead() > lineLead) {
- lineLead = bp.getLead();
- }
- if (bp.getTotal() > maxtb) {
- maxtb = bp.getTotal();
- }
- if (bp.getMiddle() > middlefollow) {
- middlefollow = bp.getMiddle();
- }
- }
- if (lastSize != null) {
- stack.add(lastSize);
- }
- }
-
- if (maxtb - lineLead > middlefollow) {
- middlefollow = maxtb - lineLead;
- }
-
- //if(holder instanceof InlineParent) {
- // ((InlineParent)holder).setHeight(lineHeight);
- //}
-
- LayoutContext lc = new LayoutContext(0);
- lc.setBaseline(lineLead);
- lc.setLineHeight(lineHeight);
-
- lc.setFlags(LayoutContext.RESOLVE_LEADING_SPACE, true);
- lc.setLeadingSpace(new SpaceSpecifier(false));
- lc.setTrailingSpace(new SpaceSpecifier(false));
- PositionIterator breakPosIter =
- new BreakPossPosIter(childBreaks, 0, childBreaks.size());
- curLM.addAreas(breakPosIter, lc);
- stackSize = stack.opt;
- }
-
- public int getStackingSize() {
- return stackSize;
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public boolean generatesInlineAreas() {
- return true;
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public Area getParentArea(Area childArea) {
- return holder;
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void addChild(Area childArea) {
- holder.addChild(childArea);
- }
-
- /**
- * Set the user agent.
- *
- * @param ua the user agent
- */
- public void setUserAgent(FOUserAgent ua) {
- userAgent = ua;
- }
-
- /**
- * @see org.apache.fop.layoutmgr.LayoutManager#getUserAgent()
- */
- public FOUserAgent getUserAgent() {
- return userAgent;
- }
-
- /**
- * Returns the logger
- * @return the logger
- */
- protected Logger getLogger() {
- return userAgent.getLogger();
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void setParent(LayoutProcessor lm) {
- parentLM = lm;
- }
-
- public LayoutProcessor getParent() {
- return this.parentLM;
- }
-
- public LayoutManagerLS getLayoutManagerLS() {
- return getParent().getLayoutManagerLS();
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public boolean canBreakBefore(LayoutContext lc) {
- return false;
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public BreakPoss getNextBreakPoss(LayoutContext context) {
- return null;
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public boolean isFinished() {
- return false;
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void setFinished(boolean isFinished) {
- //to be done
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void addAreas(PositionIterator posIter, LayoutContext context) { }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void init() {
- //to be done
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void resetPosition(Position position) {
- //to be done
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void getWordChars(StringBuffer sbChars, Position bp1,
- Position bp2) { }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public String getCurrentPageNumber() {
- return parentLM.getCurrentPageNumber();
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public PageViewport resolveRefID(String ref) {
- return parentLM.resolveRefID(ref);
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void addIDToPage(String id) {
- parentLM.addIDToPage(id);
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void addUnresolvedArea(String id, Resolveable res) {
- parentLM.addUnresolvedArea(id, res);
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public void addMarkerMap(Map marks, boolean start, boolean isfirst) {
- parentLM.addMarkerMap(marks, start, isfirst);
- }
-
- /** @see org.apache.fop.layoutmgr.LayoutManager */
- public Marker retrieveMarker(String name, int pos, int boundary) {
- return parentLM.retrieveMarker(name, pos, boundary);
- }
- }
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