+++ /dev/null
-/*
- * Copyright (c) 2009, Takeyuki Nagao
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the
- * following conditions are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the
- * following disclaimer in the documentation and/or other
- * materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- * OF SUCH DAMAGE.
- */
-
-package jp.sourceforge.dvibrowser.dvicore.special;
-
-import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import jp.sourceforge.dvibrowser.dvicore.DviException;
-import jp.sourceforge.dvibrowser.dvicore.DviObject;
-import jp.sourceforge.dvibrowser.dvicore.DviResolution;
-import jp.sourceforge.dvibrowser.dvicore.DviSize;
-import jp.sourceforge.dvibrowser.dvicore.api.DviContextSupport;
-import jp.sourceforge.dvibrowser.dvicore.api.DviDocument;
-import jp.sourceforge.dvibrowser.dvicore.api.DviPage;
-import jp.sourceforge.dvibrowser.dvicore.api.HasURL;
-import jp.sourceforge.dvibrowser.dvicore.ctx.DviToolkit;
-import jp.sourceforge.dvibrowser.dvicore.gs.GhostscriptUtils;
-import jp.sourceforge.dvibrowser.dvicore.gui.swing.ViewSpec;
-import jp.sourceforge.dvibrowser.dvicore.image.split.ImageFileConfig;
-import jp.sourceforge.dvibrowser.dvicore.image.split.SplitImage;
-import jp.sourceforge.dvibrowser.dvicore.image.split.ZipSplitImageReader;
-import jp.sourceforge.dvibrowser.dvicore.image.split.ZipSplitImageWriter;
-import jp.sourceforge.dvibrowser.dvicore.util.DviUtils;
-import jp.sourceforge.dvibrowser.dvicore.util.ZipBuilder;
-import jp.sourceforge.dvibrowser.dvicore.util.concurrent.Computation;
-
-
-public class EPS2SplitImagePreparator
-extends DviObject
-implements Computation<String, SplitImage> {
- private static final Logger LOGGER = Logger
- .getLogger(EPS2SplitImagePreparator.class.getName());
-
- private final DviPage page;
- private final ViewSpec viewSpec;
- private final String postScriptData;
- private final String hash;
-
- public EPS2SplitImagePreparator(DviContextSupport dcs, DviPage page, ViewSpec viewSpec)
- throws DviException
- {
- super(dcs);
- this.page = page;
- this.viewSpec = viewSpec;
- DviToolkit utils = getDviContext().getDviToolkit();
- this.postScriptData = utils.getEmbeddedPostScript(page, viewSpec);
- this.hash = DviUtils.md5Hex(postScriptData);
- }
-
- public SplitImage call() throws Exception
- {
- if (postScriptData == null) return null;
-
- File dir = getDviContext().getTemporaryDirectory();
- String key = getCacheKey();
- String keyHash = DviUtils.md5Hex(key);
- String basename = String.format("gs--%s--%08d", keyHash, page.getPageNumber());
- String imgExt = ".zip";
- // TODO: outsource the resolution configuration.
- DviResolution res = new DviResolution(400, 4);
- DviSize unit = new DviSize(256, 256);
- File imgFile = new File(dir, basename + imgExt);
- imgFile.deleteOnExit();
- if (!imgFile.exists()) {
- LOGGER.fine("Now creating postscript image for page " + page);
- LOGGER.fine("Using key=" + key);
- LOGGER.fine("Using keyHash=" + keyHash);
- LOGGER.finer("PostScriptData= " + postScriptData);
- try {
- File tmpFile = File.createTempFile("gs-temp", null);
- tmpFile.deleteOnExit();
- try {
- final FileOutputStream fos = new FileOutputStream(tmpFile);
- final ZipBuilder zb = new ZipBuilder(fos);
- // TODO: outsource the encoding configuration.
- final InputStream is = new ByteArrayInputStream(postScriptData.getBytes("UTF-8"));
- try {
- final ZipSplitImageWriter imageWriter = new ZipSplitImageWriter
- (basename, ImageFileConfig.PNG, res, zb);
- // Remark that Ghostscript counts pages from 1 not 0.
- GhostscriptUtils.renderAndSplit(getDviContext(), is, unit, imageWriter, res, "pnmraw", 1, 0, null);
- } finally {
- DviUtils.silentClose(fos);
- DviUtils.silentClose(is);
- }
- // TODO: lock before renaming to avoid race condition against other thread.
- if (!tmpFile.renameTo(imgFile)) {
- throw new DviException("Failed to create cache file: " + imgFile);
- }
- } finally {
- tmpFile.delete();
- }
- } catch (FileNotFoundException e) {
- DviUtils.logStackTrace(LOGGER, Level.WARNING, e);
- throw new DviException(e);
- } catch (IOException e) {
- DviUtils.logStackTrace(LOGGER, Level.WARNING, e);
- throw new DviException(e);
- }
- }
- ZipSplitImageReader imageReader = new ZipSplitImageReader(imgFile);
- return imageReader.getSplitImage();
- }
-
- public String getCacheKey()
- {
- // TODO: use viewSpec.
- String pageKey = null;
- try {
- DviDocument doc = page.getDocument();
- if (doc instanceof HasURL) {
- URL url = ((HasURL) doc).getURL();
- pageKey = url.toExternalForm() + "#page" + page.getPageNumber();
- }
- } catch (DviException e) {
- LOGGER.warning(e.toString());
- pageKey = page.getCacheKey();
- }
- return getClass().getName() + "--" + hash + "-" + pageKey;
- }
-
- public ViewSpec getViewSpec()
- {
- return viewSpec;
- }
-
- public DviPage getPage()
- {
- return page;
- }
-}
OSDN Git Service
