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/*
* Braille Utils (C) 2010-2011 Daisy Consortium
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.daisy.braille.utils.pef;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.daisy.dotify.api.embosser.EightDotFallbackMethod;
import org.daisy.dotify.api.embosser.Embosser;
import org.daisy.dotify.api.embosser.EmbosserCatalogService;
import org.daisy.dotify.api.embosser.EmbosserFactoryException;
import org.daisy.dotify.api.embosser.EmbosserFeatures;
import org.daisy.dotify.api.embosser.EmbosserWriter;
import org.daisy.dotify.api.paper.PageFormat;
import org.daisy.braille.utils.pef.PEFHandler.Alignment;
import org.xml.sax.SAXException;
/**
* Provides a facade for both PEFHandler and TextHandler
* @author Joel Håkansson
*/
public class PEFConverterFacade {
/**
* Key for parsePefFile setting,
* corresponding settings value should match an embosser identifier
*/
public static final String KEY_EMBOSSER = "embosser";
/**
* Key for parsePefFile setting,
* corresponding settings value should match a table identifier
*/
public static final String KEY_TABLE = "table";
/**
* Key for parsePefFile setting,
* corresponding settings value should match a value in StandardLineBreaks.Type
*/
public static final String KEY_BREAKS = "breaks";
/**
* Key for parsePefFile setting,
* corresponding settings value should match a range
*/
public static final String KEY_RANGE = "range";
/**
* Key for parsePefFile setting,
* corresponding settings value should match a value in {@link EightDotFallbackMethod}
*/
public static final String KEY_FALLBACK = "fallback";
/**
* Key for parsePefFile setting,
* corresponding settings value should be a character in the range 0x2800-0x283F
*/
public static final String KEY_REPLACEMENT = "replacement";
/**
* Key for parsePefFile setting,
* corresponding settings value should match a padding style
*/
public static final String KEY_PADDING = "pad";
/**
* Key for parsePefFile setting,
* corresponding settings value should be the number of characters to offset alignment by
*/
public static final String KEY_ALIGNMENT_OFFSET = "alignmentOffset";
/**
* Key for parsePefFile setting,
* corresponding settings value should match a value in {@link Alignment}
*/
public static final String KEY_ALIGN = "align";
/**
* Key for parsePefFile setting,
* corresponding settings value should be a number, in millimeters
*/
public static final String KEY_CELL_WIDTH = "cellWidth";
/**
* Key for parsePefFile setting,
* corresponding settings value should be a number, in millimeters
*/
public static final String KEY_CELL_HEIGHT = "cellHeight";
private final EmbosserCatalogService ef;
/**
* Creates a new {@link PEFConverterFacade} with the specified embosser factory.
* @param embosserFactory the embosser factory
*/
public PEFConverterFacade(EmbosserCatalogService embosserFactory) {
this.ef = embosserFactory;
}
/**
* Parses the given PEF-file input using the supplied output stream and settings.
* @param input the input
* @param os the output stream
* @param pf the page format
* @param settings the settings
* @throws NumberFormatException if an exception occurs
* @throws ParserConfigurationException if an exception occurs
* @throws SAXException if an exception occurs
* @throws IOException if an exception occurs
* @throws EmbosserFactoryException if an exception occurs
* @throws UnsupportedWidthException if an exception occurs
*/
public void parsePefFile(File input, OutputStream os, PageFormat pf, Map settings) throws NumberFormatException, ParserConfigurationException, SAXException, IOException, EmbosserFactoryException, UnsupportedWidthException {
Range range = null;
Alignment align = Alignment.CENTER_OUTER;
int offset = 0;
Embosser emb = null;
emb = ef.newEmbosser(settings.remove(KEY_EMBOSSER));
if (emb==null) {
emb = ef.newEmbosser("org_daisy.GenericEmbosserProvider.EmbosserType.NONE");
}
if (pf!=null) {
emb.setFeature(EmbosserFeatures.PAGE_FORMAT, pf);
}
for (String key : settings.keySet()) {
String value = settings.get(key);
if (KEY_TABLE.equals(key)) {
emb.setFeature(EmbosserFeatures.TABLE, value);
} else if (KEY_BREAKS.equals(key)) {
emb.setFeature("breaks", value);
} else if (KEY_RANGE.equals(key)) {
range = Range.parseRange(value);
} else if (KEY_FALLBACK.equals(key)) {
emb.setFeature(EmbosserFeatures.UNSUPPORTED_CELL_FALLBACK_METHOD, value);
} else if (KEY_REPLACEMENT.equals(key)) {
emb.setFeature(EmbosserFeatures.UNSUPPORTED_CELL_REPLACEMENT, value);
} else if (KEY_PADDING.equals(key)) {
emb.setFeature("padNewline", value);
} else if (KEY_ALIGNMENT_OFFSET.equals(key)) {
offset = Integer.parseInt(value);
} else if (KEY_ALIGN.equals(key)) {
if (value.equalsIgnoreCase("center")) {
value = "CENTER_OUTER";
}
try {
align = Alignment.valueOf(value.toUpperCase());
} catch (IllegalArgumentException e) {
System.out.println("Unknown value: " + value);
}
} else if (KEY_CELL_WIDTH.equals(key)) {
emb.setFeature(EmbosserFeatures.CELL_WIDTH, value);
} else if (KEY_CELL_HEIGHT.equals(key)) {
emb.setFeature(EmbosserFeatures.CELL_HEIGHT, value);
} else {
throw new IllegalArgumentException("Unknown option \"" + key + "\"");
}
}
EmbosserWriter embosser = emb.newEmbosserWriter(os);
PEFHandler.Builder builder =
new PEFHandler.Builder(embosser).
range(range).
align(align).
offset(offset);
PEFHandler ph = builder.build();
parsePefFile(input, ph);
}
/**
* Parses the given input using the supplied PEFHandler.
* @param input the input PEF file
* @param ph the PEFHandler to use
* @throws ParserConfigurationException if an exception occurs
* @throws SAXException if an exception occurs
* @throws IOException if an exception occurs
* @throws UnsupportedWidthException if an exception occurs
*/
public void parsePefFile(File input, PEFHandler ph) throws ParserConfigurationException, SAXException, IOException, UnsupportedWidthException {
if (!input.exists()) {
throw new IllegalArgumentException("Input does not exist");
}
FileInputStream is = new FileInputStream(input);
parsePefFile(is, ph);
}
/**
* Parses the given input stream using the supplied PEFHandler.
* @param is the input stream
* @param ph the PEFHandler
* @throws ParserConfigurationException if an exception occurs
* @throws SAXException if an exception occurs
* @throws IOException if an exception occurs
* @throws UnsupportedWidthException if an exception occurs
*/
public void parsePefFile(InputStream is, PEFHandler ph) throws ParserConfigurationException, SAXException, IOException, UnsupportedWidthException {
SAXParserFactory spf = SAXParserFactory.newInstance();
spf.setNamespaceAware(true);
SAXParser sp = spf.newSAXParser();
try {
sp.parse(is, ph);
} catch (SAXException e) {
if (ph.hasWidthError()) {
throw new UnsupportedWidthException(e);
} else {
throw e;
}
}
}
}
