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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;
-
- import java.awt.Dimension;
- import java.awt.Rectangle;
- import java.io.FileNotFoundException;
- import java.io.IOException;
- import java.net.URI;
- import java.net.URISyntaxException;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.image.loader.ImageException;
- import org.apache.xmlgraphics.image.loader.ImageInfo;
- import org.apache.xmlgraphics.image.loader.ImageManager;
- import org.apache.xmlgraphics.image.loader.util.ImageUtil;
-
- import org.apache.fop.ResourceEventProducer;
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.area.AreaTreeHandler;
- import org.apache.fop.area.Block;
- import org.apache.fop.area.BodyRegion;
- import org.apache.fop.area.CTM;
- import org.apache.fop.area.LineArea;
- import org.apache.fop.area.PageSequence;
- import org.apache.fop.area.PageViewport;
- import org.apache.fop.area.RegionViewport;
- import org.apache.fop.area.inline.Image;
- import org.apache.fop.area.inline.InlineViewport;
- import org.apache.fop.datatypes.FODimension;
- import org.apache.fop.datatypes.URISpecification;
- import org.apache.fop.fo.Constants;
- import org.apache.fop.fo.extensions.ExternalDocument;
- import org.apache.fop.layoutmgr.inline.ImageLayout;
- import org.apache.fop.traits.WritingMode;
-
- /**
- * LayoutManager for an external-document extension element. This class is instantiated by
- * area.AreaTreeHandler for each fo:external-document found in the
- * input document.
- */
- public class ExternalDocumentLayoutManager extends AbstractPageSequenceLayoutManager {
-
- private static Log log = LogFactory.getLog(ExternalDocumentLayoutManager.class);
-
- private ImageLayout imageLayout;
-
- /**
- * Constructor
- *
- * @param ath the area tree handler object
- * @param document fox:external-document to process
- */
- public ExternalDocumentLayoutManager(AreaTreeHandler ath, ExternalDocument document) {
- super(ath, document);
- }
-
- /**
- * @return the ExternalDocument being managed by this layout manager
- */
- protected ExternalDocument getExternalDocument() {
- return (ExternalDocument)pageSeq;
- }
-
- /** {@inheritDoc} */
- public PageSequenceLayoutManager getPSLM() {
- throw new IllegalStateException("getPSLM() is illegal for " + getClass().getName());
- }
-
- /** {@inheritDoc} */
- public void activateLayout() {
- initialize();
-
- FOUserAgent userAgent = pageSeq.getUserAgent();
- ImageManager imageManager = userAgent.getImageManager();
-
- String uri = URISpecification.getURL(getExternalDocument().getSrc());
- Integer firstPageIndex = ImageUtil.getPageIndexFromURI(uri);
- boolean hasPageIndex = (firstPageIndex != null);
-
- try {
- ImageInfo info = imageManager.getImageInfo(uri, userAgent.getImageSessionContext());
-
- Object moreImages = info.getCustomObjects().get(ImageInfo.HAS_MORE_IMAGES);
- boolean hasMoreImages = moreImages != null && !Boolean.FALSE.equals(moreImages);
-
- Dimension intrinsicSize = info.getSize().getDimensionMpt();
- ImageLayout layout = new ImageLayout(getExternalDocument(), this, intrinsicSize);
-
- PageSequence pageSequence = new PageSequence(null);
- transferExtensions(pageSequence);
- areaTreeHandler.getAreaTreeModel().startPageSequence(pageSequence);
- if (log.isDebugEnabled()) {
- log.debug("Starting layout");
- }
-
- makePageForImage(info, layout);
-
- if (!hasPageIndex && hasMoreImages) {
- if (log.isTraceEnabled()) {
- log.trace("Starting multi-page processing...");
- }
- URI originalURI;
- try {
- originalURI = new URI(URISpecification.escapeURI(uri));
- int pageIndex = 1;
- while (hasMoreImages) {
- URI tempURI = new URI(originalURI.getScheme(),
- originalURI.getSchemeSpecificPart(),
- "page=" + Integer.toString(pageIndex + 1));
- if (log.isTraceEnabled()) {
- log.trace("Subimage: " + tempURI.toASCIIString());
- }
- ImageInfo subinfo = imageManager.getImageInfo(
- tempURI.toASCIIString(), userAgent.getImageSessionContext());
-
- moreImages = subinfo.getCustomObjects().get(ImageInfo.HAS_MORE_IMAGES);
- hasMoreImages = moreImages != null && !Boolean.FALSE.equals(moreImages);
-
- intrinsicSize = subinfo.getSize().getDimensionMpt();
- layout = new ImageLayout(
- getExternalDocument(), this, intrinsicSize);
-
- makePageForImage(subinfo, layout);
-
- pageIndex++;
- }
- } catch (URISyntaxException e) {
- getResourceEventProducer().uriError(this, uri, e,
- getExternalDocument().getLocator());
- }
- }
- } catch (FileNotFoundException fnfe) {
- getResourceEventProducer().imageNotFound(this, uri, fnfe,
- getExternalDocument().getLocator());
- } catch (IOException ioe) {
- getResourceEventProducer().imageIOError(this, uri, ioe,
- getExternalDocument().getLocator());
- } catch (ImageException ie) {
- getResourceEventProducer().imageError(this, uri, ie,
- getExternalDocument().getLocator());
- }
- }
-
- private ResourceEventProducer getResourceEventProducer() {
- return ResourceEventProducer.Provider.get(
- getExternalDocument().getUserAgent().getEventBroadcaster());
- }
-
- private void makePageForImage(ImageInfo info, ImageLayout layout) {
- this.imageLayout = layout;
- curPage = makeNewPage(false);
- fillPage(info.getOriginalURI());
- finishPage();
- }
-
- private void fillPage(String uri) {
-
- Dimension imageSize = this.imageLayout.getViewportSize();
-
- Block blockArea = new Block();
- blockArea.setChangeBarList(getChangeBarList());
- blockArea.setIPD(imageSize.width);
- LineArea lineArea = new LineArea();
-
- Image imageArea = new Image(uri);
- TraitSetter.setProducerID(imageArea, fobj.getId());
- transferForeignAttributes(imageArea);
-
- InlineViewport vp = new InlineViewport(imageArea, fobj.getBidiLevel());
- TraitSetter.setProducerID(vp, fobj.getId());
- vp.setIPD(imageSize.width);
- vp.setBPD(imageSize.height);
- vp.setContentPosition(imageLayout.getPlacement());
- vp.setBlockProgressionOffset(0);
-
- //Link them all together...
- lineArea.addInlineArea(vp);
- lineArea.updateExtentsFromChildren();
- blockArea.addLineArea(lineArea);
- curPage.getPageViewport().getCurrentFlow().addBlock(blockArea);
- curPage.getPageViewport().getCurrentSpan().notifyFlowsFinished();
- }
-
- /** {@inheritDoc} */
- public void finishPageSequence() {
- if (pageSeq.hasId()) {
- idTracker.signalIDProcessed(pageSeq.getId());
- }
-
- pageSeq.getRoot().notifyPageSequenceFinished(currentPageNum,
- (currentPageNum - startPageNum) + 1);
- areaTreeHandler.notifyPageSequenceFinished(pageSeq,
- (currentPageNum - startPageNum) + 1);
-
- if (log.isDebugEnabled()) {
- log.debug("Ending layout");
- }
- }
-
- /** {@inheritDoc} */
- protected Page createPage(int pageNumber, boolean isBlank) {
- String pageNumberString = pageSeq.makeFormattedPageNumber(pageNumber);
-
- Dimension imageSize = this.imageLayout.getViewportSize();
-
- // Set up the CTM on the page reference area based on writing-mode
- // and reference-orientation
- Rectangle referenceRect;
- if (pageSeq.getReferenceOrientation() % 180 == 0) {
- referenceRect = new Rectangle(0, 0, imageSize.width, imageSize.height);
- } else {
- referenceRect = new Rectangle(0, 0, imageSize.height, imageSize.width);
- }
- FODimension reldims = new FODimension(0, 0);
- // [TBD] BIDI ALERT
- CTM pageCTM = CTM.getCTMandRelDims(pageSeq.getReferenceOrientation(),
- WritingMode.LR_TB, referenceRect, reldims);
-
- Page page = new Page(referenceRect, pageNumber, pageNumberString, isBlank);
-
- PageViewport pv = page.getPageViewport();
- org.apache.fop.area.Page pageArea = new org.apache.fop.area.Page();
- pv.setPage(pageArea);
-
- RegionViewport rv = new RegionViewport(referenceRect);
-
- if (pageSeq.getReferenceOrientation() % 180 == 0) {
- rv.setIPD(referenceRect.width);
- rv.setBPD(referenceRect.height);
- } else {
- rv.setIPD(referenceRect.height);
- rv.setBPD(referenceRect.width);
- }
- rv.setClip(true);
-
- BodyRegion body = new BodyRegion(Constants.FO_REGION_BODY,
- "fop-image-region", rv, 1, 0);
- body.setIPD(imageSize.width);
- body.setBPD(imageSize.height);
- body.setCTM(pageCTM);
- rv.setRegionReference(body);
- pageArea.setRegionViewport(
- Constants.FO_REGION_BODY, rv);
- //Set unique key obtained from the AreaTreeHandler
- pv.setKey(areaTreeHandler.generatePageViewportKey());
-
- //Also creates first normal flow region
- pv.createSpan(false);
-
- return page;
- }
-
- }
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