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nl.dedicon.pipeline.braille.step.DediconBrl Maven / Gradle / Ivy
package nl.dedicon.pipeline.braille.step;
import nl.dedicon.pipeline.braille.step.Utils;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;
import nl.dedicon.pipeline.braille.calabash.impl.SymbolsListStep;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Dedicon BRL
* Maps BRL characters to Unicode Braille characters
*
* Based on Wim Berden's dediconbrl.php
* Modifications:
* - added missing characters so that all uppercase/lowercase combinations are present
* - reordered so that an uppercase character always precedes the lowercase variant
* - changed Ú mapping from 0x2839 to 0x283E
*
* @author Paul Rambags
*/
public class DediconBrl {
private static final Map brlToUnicodeMap = new HashMap<>();
private static final Logger logger = LoggerFactory.getLogger(SymbolsListStep.class);
private static void map (char brlChar, int unicodeChar) {
brlToUnicodeMap.put(brlChar, (char)unicodeChar);
}
static {
map(' ', 0x2800);
map('1', 0x2801);
map('A', 0x2801);
map('a', 0x2801);
map(',', 0x2802);
map('2', 0x2803);
map('B', 0x2803);
map('b', 0x2803);
map('\'', 0x2804);
map('K', 0x2805);
map('k', 0x2805);
map(';', 0x2806);
map('L', 0x2807);
map('l', 0x2807);
map('&', 0x2808);
map('3', 0x2809);
map('C', 0x2809);
map('c', 0x2809);
map('9', 0x280A);
map('I', 0x280A);
map('i', 0x280A);
map('6', 0x280B);
map('F', 0x280B);
map('f', 0x280B);
map('/', 0x280C);
map('ì', 0x280C);
map('í', 0x280C);
map('M', 0x280D);
map('m', 0x280D);
map('S', 0x280E);
map('s', 0x280E);
map('P', 0x280F);
map('p', 0x280F);
map('|', 0x2810);
map('5', 0x2811);
map('E', 0x2811);
map('e', 0x2811);
map(':', 0x2812);
map('8', 0x2813);
map('H', 0x2813);
map('h', 0x2813);
map('*', 0x2814);
map('O', 0x2815);
map('o', 0x2815);
map('!', 0x2816);
map('+', 0x2816);
map('¡', 0x2816);
map('R', 0x2817);
map('r', 0x2817);
map(']', 0x2818);
map('4', 0x2819);
map('D', 0x2819);
map('d', 0x2819);
map('0', 0x281A);
map('J', 0x281A);
map('j', 0x281A);
map('7', 0x281B);
map('G', 0x281B);
map('g', 0x281B);
map('Ä', 0x281C);
map('ä', 0x281C);
map('Å', 0x281C);
map('å', 0x281C);
map('N', 0x281D);
map('n', 0x281D);
map('T', 0x281E);
map('t', 0x281E);
map('Q', 0x281F);
map('q', 0x281F);
map('@', 0x2820);
map('\\', 0x2821);
map('Â', 0x2821);
map('â', 0x2821);
map('?', 0x2822);
map('¿', 0x2822);
map('Ê', 0x2823);
map('ê', 0x2823);
map('-', 0x2824);
map('U', 0x2825);
map('u', 0x2825);
map('<', 0x2826);
map('}', 0x2826);
map('V', 0x2827);
map('v', 0x2827);
map('{', 0x2828);
map('Î', 0x2829);
map('î', 0x2829);
map('Ö', 0x282A);
map('ö', 0x282A);
map('Ë', 0x282B);
map('ë', 0x282B);
map('Ò', 0x282C);
map('ò', 0x282C);
map('Ó', 0x282C);
map('ó', 0x282C);
map('X', 0x282D);
map('x', 0x282D);
map('È', 0x282E);
map('è', 0x282E);
map('ß', 0x282E);
map('#', 0x282F);
map('Ç', 0x282F);
map('ç', 0x282F);
map('~', 0x2830);
map('Û', 0x2831);
map('û', 0x2831);
map('$', 0x2832);
map('.', 0x2832);
map('Ü', 0x2833);
map('ü', 0x2833);
map('"', 0x2834);
map('>', 0x2834);
map('Z', 0x2835);
map('z', 0x2835);
map('(', 0x2836);
map(')', 0x2836);
map('=', 0x2836);
map('À', 0x2837);
map('à', 0x2837);
map('Á', 0x2837);
map('á', 0x2837);
map('[', 0x2838);
map('Ô', 0x2839);
map('ô', 0x2839);
map('W', 0x283A);
map('w', 0x283A);
map('Ï', 0x283B);
map('ï', 0x283B);
map('Ñ', 0x283B);
map('ñ', 0x283B);
map('%', 0x283C);
map('Y', 0x283D);
map('y', 0x283D);
map('Ù', 0x283E);
map('ù', 0x283E);
map('Ú', 0x283E);
map('ú', 0x283E);
map('É', 0x283F);
map('é', 0x283F);
}
/**
* Convert BRL characters to unicode braille, if necessary.
*
* Sometimes a BRL character must be converted to a unicode braille character.
* For instance, the pipeline would convert BRL character ~ to (5 26) but it should be converted to (56) according to the table above.
* Case information gets lost when converting to unicode braille.
* Therefore, as much as possible we let the pipeline take care of the conversion to unicode braille.
*
* @param braille Symbol replacement
* @return certain BRL characters replaced by Unicode braille characters
*/
public static String convert(String braille) {
StringWriter result = new StringWriter();
for (int i = 0; i < braille.length(); i++) {
char brailleChar = braille.charAt(i);
if (Character.isLetterOrDigit(brailleChar)) {
// let the pipeline convert this BRL character to unicode braille
// and take care of capitalization
result.append(brailleChar);
} else {
Character unicodeChar = brlToUnicodeMap.get(brailleChar);
if (unicodeChar != null) {
result.append(unicodeChar);
} else {
result.append(brailleChar);
if (!Utils.isBraille(brailleChar)) {
logger.warn("Unknown BRL character: '{}'", brailleChar);
}
}
}
}
return result.toString();
}
}
