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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 org.daisy.dotify.api.table.BrailleConverter;
import org.daisy.dotify.api.table.Table;
import org.daisy.dotify.api.table.TableCatalogService;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Provides a handler for reading text and writing a PEF-file.
*
* @author Joel Håkansson
*/
public class TextHandler {
/**
* Defines a date format (yyyy-MM-dd).
*/
public static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
/**
* Key for parseTextFile setting,
* corresponding settings value should contain the title of the publication.
*/
public static final String KEY_TITLE = "title";
/**
* Key for parseTextFile setting,
* corresponding settings value should contain the author of the publication.
*/
public static final String KEY_AUTHOR = "author";
/**
* Key for parseTextFile setting,
* corresponding settings value should contain the identifier for the publication.
*/
public static final String KEY_IDENTIFIER = "identifier";
/**
* Key for parseTextFile setting,
* corresponding settings value should match the table to use.
*/
public static final String KEY_MODE = "mode";
/**
* Key for parseTextFile setting,
* corresponding settings value should contain the language of the publication.
*/
public static final String KEY_LANGUAGE = "language";
/**
* Key for parseTextFile setting,
* corresponding settings value should be "true" for duplex or "false" for simplex.
*/
public static final String KEY_DUPLEX = "duplex";
/**
* Key for parseTextFile setting,
* corresponding settings value should be a string containing a valid date on the form yyyy-MM-dd.
*/
public static final String KEY_DATE = "date";
private static final Logger LOGGER = Logger.getLogger(TextHandler.class.getCanonicalName());
private final File input;
private final File output;
private final TableCatalogService factory;
private final String title;
private final String author;
private final String language;
private final String identifier;
private final BrailleConverter converter;
private final boolean duplex;
private Date date;
private int maxRows;
private int maxCols;
/**
* Provides a Builder for TextHandler.
*/
public static class Builder {
// required params
private final File input;
private final File output;
private final TableCatalogService factory;
// optional params
private String title = "";
private String author = "";
private String language = "";
private String identifier = "";
private String converterId = null;
private boolean duplex = true;
private Date date = new Date();
/**
* Create a new TextParser builder.
*
* @param input the input
* @param output the output
* @param factory the table catalog
*/
public Builder(File input, File output, TableCatalogService factory) {
this.input = input;
this.output = output;
this.factory = factory;
String s = (new Long((Math.round(Math.random() * 1000000000)))).toString();
char[] chars = s.toCharArray();
char[] dest = new char[]{'0', '0', '0', '0', '0', '0', '0', '0', '0'};
System.arraycopy(chars, 0, dest, 9 - chars.length, chars.length);
this.identifier = "AUTO_ID_" + new String(dest);
}
/**
* Sets options from a map.
*
* @param settings the settings.
* @return returns this object
* @throws IllegalArgumentException if a key is unknown or if a value doesn't meet the requirements.
*/
public Builder options(Map settings) {
for (String key : settings.keySet()) {
String value = settings.get(key);
if (KEY_TITLE.equals(key)) {
title(value);
} else if (KEY_AUTHOR.equals(key)) {
author(value);
} else if (KEY_IDENTIFIER.equals(key)) {
identifier(value);
} else if (KEY_MODE.equals(key)) {
converterId(value);
} else if (KEY_LANGUAGE.equals(key)) {
language(value);
} else if (KEY_DUPLEX.equals(key)) {
duplex("true".equals(value.toLowerCase()));
} else if (KEY_DATE.equals(key)) {
try {
date(DATE_FORMAT.parse(value));
} catch (ParseException e) {
throw new IllegalArgumentException(e);
}
} else {
throw new IllegalArgumentException("Unknown option \"" + key + "\"");
}
}
return this;
}
//init optional params here
/**
* Sets the title for publications created using TextHandlers created with this builder.
*
* @param value the title
* @return returns this object
*/
public Builder title(String value) {
if (value == null) {
throw new IllegalArgumentException("Null value not accepted.");
}
title = value;
return this;
}
/**
* Sets the author for publications created using TextHandlers created with this builder.
*
* @param value the author
* @return returns this object
*/
public Builder author(String value) {
if (value == null) {
throw new IllegalArgumentException("Null value not accepted.");
}
author = value;
return this;
}
/**
* Sets the language for publications created using TextHandlers created with this builder.
*
* @param value the language
* @return returns this object
*/
public Builder language(String value) {
if (value == null) {
throw new IllegalArgumentException("Null value not accepted.");
}
language = value;
return this;
}
/**
* Sets the identifier for publications created using TextHandlers created with this builder.
*
* @param value the identifier
* @return returns this object
*/
public Builder identifier(String value) {
if (value == null) {
throw new IllegalArgumentException("Null value not accepted.");
}
identifier = value;
return this;
}
/**
* Sets the converter identifier to be used when creating a TextHandler. See TableCatalog
* for available values. If none is suppled, the builder will attempt to select one
* based on file input characteristics.
*
* @param value the identifier for the converter
* @return returns this object
*/
public Builder converterId(String value) {
converterId = value;
return this;
}
/**
* Sets the duplex property for publications created using TextHandlers created with this builder.
*
* @param value the duplex value
* @return returns this object
*/
public Builder duplex(boolean value) {
duplex = value;
return this;
}
/**
* Sets the date for publications created using TextHandlers created with this builder.
*
* @param value the date to use
* @return returns this object
*/
public Builder date(Date value) {
if (value == null) {
throw new IllegalArgumentException("Null value not accepted.");
}
date = value;
return this;
}
/**
* Builds a TextParser using the settings of this Builder.
*
* @return returns a new TextParser
* @throws IOException if an error occurs
* @throws InputDetectionException if an error occurs
* @throws UnsupportedEncodingException if an error occurs
*/
public TextHandler build() throws IOException, InputDetectionException {
return new TextHandler(this);
}
/**
* Parses the input file with the current settings.
*
* @throws InputDetectionException if an error occurs
* @throws IOException if an error occurs
*/
public void parse() throws InputDetectionException, IOException {
new TextHandler(this).parse();
}
}
private TextHandler(Builder builder) throws IOException, InputDetectionException {
input = builder.input;
output = builder.output;
factory = builder.factory;
title = builder.title;
author = builder.author;
language = builder.language;
identifier = builder.identifier;
if (builder.converterId == null) {
List
tableCandiates;
FileInputStream is = new FileInputStream(input);
TextInputDetector tid = new TextInputDetector(factory);
tableCandiates = tid.detect(is);
if (tableCandiates == null || tableCandiates.size() < 1) {
throw new InputDetectionException("Cannot detect table.");
}
if (tableCandiates.size() > 1) {
StringBuilder sb = new StringBuilder();
boolean first = true;
for (Table t : tableCandiates) {
if (!first) {
sb.append(", ");
} else {
first = false;
}
sb.append("'" + t.getDisplayName() + "'");
}
throw new InputDetectionException(
"Cannot choose a table automatically. Possible matches: " + sb.toString()
);
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Using " + tableCandiates.get(0).getDisplayName());
}
converter = tableCandiates.get(0).newBrailleConverter();
} else {
converter = factory.newTable(builder.converterId).newBrailleConverter();
}
duplex = builder.duplex;
date = builder.date;
}
/**
* Creates a new builder with the supplied parameters.
*
* @param input the input file
* @param output the output file
* @param factory the table catalog
* @return returns a new builder
*/
public static Builder with(File input, File output, TableCatalogService factory) {
return new TextHandler.Builder(input, output, factory);
}
/**
* Parse using current settings.
*
* @throws IOException if an I/O error occurs
*/
public void parse() throws IOException {
if (date == null) {
date = new Date();
}
FileInputStream is = new FileInputStream(input);
PrintWriter pw = new PrintWriter(output, "utf-8");
LineNumberReader lr = new LineNumberReader(new InputStreamReader(is, converter.getPreferredCharset()));
// determine max rows/page and chars/row
read(lr, null);
// reset input
is = new FileInputStream(input);
lr = new LineNumberReader(new InputStreamReader(is, converter.getPreferredCharset()));
pw.println("");
pw.println("");
pw.println(" ");
pw.println(" ");
if (!"".equals(title)) {
pw.println(" " + title + "");
}
if (!"".equals(author)) {
pw.println(" " + author + "");
}
if (!"".equals(language)) {
pw.println(" " + language + "");
}
pw.println(" " + DATE_FORMAT.format(date) + "");
pw.println(" application/x-pef+xml");
if (!"".equals(identifier)) {
pw.println(" " + identifier + "");
}
pw.println(" ");
pw.println(" ");
pw.println(" ");
pw.println(
" "
);
pw.println(" ");
read(lr, pw);
pw.println(" ");
pw.println(" ");
pw.println(" ");
pw.println("");
pw.flush();
pw.close();
}
private void read(LineNumberReader lr, PrintWriter pw) throws IOException {
maxRows = 0;
maxCols = 0;
int cRows = 0;
boolean pageClosed = true;
int eofIndex = -1;
cRows++;
String line = lr.readLine();
while (line != null) {
eofIndex = line.indexOf(0x1A);
if (eofIndex > -1) {
line = line.substring(0, eofIndex); //remove trailing characters beyond eof-mark (CTRL+Z)
}
if ("\f".equals(line)) {
// if line consists of a single form feed character. Just close the page (don't add rows yet).
// if page is already closed, this is an empty page
if (pageClosed) {
if (pw != null) {
pw.println(" ");
}
pageClosed = false;
}
if (pw != null) {
pw.println(" ");
}
pageClosed = true;
cRows--; // don't count this row
if (cRows > maxRows) {
maxRows = cRows;
}
cRows = 0;
} else {
String[] pieces = line.split("\\f", -1); //split on form feed
int i = 1;
for (String p : pieces) {
if (i > 1) { // there were form feeds
if (pw != null) {
pw.println(" ");
}
pageClosed = true;
cRows--; // don't count this row
if (cRows > maxRows) {
maxRows = cRows;
}
cRows = 0;
}
if (pageClosed) {
if (pw != null) {
pw.println(" ");
}
pageClosed = false;
}
if (p.length() > maxCols) {
maxCols = p.length();
}
// don't output if row contains form feeds and this segment equals ""
if (!(pieces.length > 1 && (i == pieces.length || i == 1) && "".equals(p)) && pw != null) {
pw.print(" ");
pw.print(converter.toBraille(p));
pw.println("");
}
i++;
}
}
if (eofIndex > -1) {
// End of file reached. Stop reading.
line = null;
} else {
line = lr.readLine();
cRows++;
}
}
lr.close();
if (!pageClosed) {
if (pw != null) {
pw.println(" ");
}
pageClosed = true;
cRows--; // don't count this row
if (cRows > maxRows) {
maxRows = cRows;
}
cRows = 0;
}
}
}
