/*
* @(#)ScriptSystem.java
*
* Copyright (c) 2005-2010 Werner Randelshofer, Immensee, Switzerland.
* All rights reserved.
*
* You may not use, copy or modify this file, except in compliance with the
* license agreement you entered into with Werner Randelshofer.
* For details see accompanying license terms.
*/
package ch.randelshofer.quaqua.util;
import java.awt.*;
/**
* Constants for the script systems supported by Unicode.
*
* @author Werner Randelshofer
* @version $Id: ScriptSystem.java 363 2010-11-21 17:41:04Z wrandelshofer $
*/
public class ScriptSystem {
/**
* Script system specification.
*/
private static class Spec {
/**
*
* @param baseline java.awt.Font.ROMAN_BASELINE, CENTER_BASELINE or
* HANGING_BASELINE.
*/
public Spec(int system, int[] ranges, int measurementChar, int baseline) {
this.system = system;
this.ranges = ranges;
this.measurementChar = (char) measurementChar;
this.baseline = baseline;
}
int[] ranges;
int system;
char measurementChar;
int baseline;
}
/**
* Script systems. The ID of the script system is the lowest
* Unicode character code of the script system.
*/
public final static int
// EUROPEAN ALPHABETS
ARMENIAN = 0x530,
COPTIC = 0x2c80,
CYRILLIC = 0x400,
GEORGIAN = 0x10a0,
GREEK = 0x370,
LATIN = 0x0,
// AFRICAN SCRIPTS
ETHIOPIC = 0x1200,
// NKO = { 0X, 0X, 0X , Font.ROMAN_BASELINE), //
TIFINAGH = 0x2d30,
// MIDDLE EASTERN SCRIPTS
ARABIC = 0x600,
HEBREW = 0x590,
SYRIAC = 0x700,
THAANA = 0x780,
// AMERICAN SCRIPTS
CANADIAN_SYLLABICS = 0x1400,
CHEROKEE = 0x13a0,
DESERET = 0x10400,
// OTHER SCRIPTS
SHAVIAN = 0x10450,
OSMANYA = 0x10480,
// GLAGOLITIC =
// INDIC SCRIPTS
BENGALI = 0x980,
DEVANAGARI = 0x900,
GUJARATI = 0xa80,
GURMUKHI = 0xa00,
KANNADA = 0xc80,
LIMBU = 0x1900,
MALAYALAM = 0xd00,
ORIYA = 0xb00,
SINHALA = 0xd80,
//SYLOTI_NAGRI =
TAMIL = 0xb80,
TELUGU = 0xc00,
// PHILIPPINE SCRIPTS
//BUHID =
// HANUNOO =
//TAGALOG =
//TAGBANWA =
// SOUTH EAST ASIAN SCRIPTS
//BUGINESE =
// BALINESE =
KHMER = 0x1780,
LAO = 0xe80,
MYANMAR = 0x1000,
//NEW_TAI_LUE =
TAI_LE = 0x1950,
THAI = 0xe00,
// EAST ASIAN SCRIPTS
HAN = 0x2e80,
BOPOMOFO = 0x3100,
HIRAGANA = 0x3040,
KATAKANA = 0x30a0,
HANGUL = 0x1100,
YI = 0xa000,
// CENTRAL ASIAN
// KHAROSHTHI =
MONGOLIAN = 0x1800,
//PHAG_SPA =
TIBETAN = 0xf00,
// ANCIENT SCRIPTS
//ANCIENT_GREEK =
//CUNEIFORM =
//OLD_PERSIAN =
//UGARITIC =
//LINEARB =
//AEGEANNUMBERS =
//COUNTING_ROD_NUMBERS =
//CYPRIOT_SYLLABARY =
//GOTHIC =
//OLDITALIC =
//OGHAM =
RUNIC = 0x16a0;
//PHOENICIAN = 0;
/**
* Lookup table for determining the script system of a
* given character.
*
* The first item in the subarray is the id of the scripts system.
* Each array consists of unicode code intervals (from, to) that
* contains characters of the script system. The intervals start from
* the first item until the second last item fo the subarray.
* The last item of the subarray specifies the most useful character in
* the script system to determine perceived ascent and perceived descent
* of a font using this script system.
*/
private final static Spec[] systems = {
// European Alphabets
new Spec(ARMENIAN, new int[] {ARMENIAN, 0x058f}, 0x552, Font.ROMAN_BASELINE), // ARMENIAN CAPITAL LETTER YIWN
new Spec(COPTIC, new int[] {COPTIC, 0x2cff}, 0x2ca0, Font.ROMAN_BASELINE), // COPTIC CAPITAL LETTER PI
new Spec(CYRILLIC, new int[] {CYRILLIC, 0x52f}, 0x41d, Font.ROMAN_BASELINE), // CYRILLIC CAPITAL LETTER EN
new Spec(GEORGIAN, new int[] {GEORGIAN, 0x10ff}, 0x10a4 , Font.ROMAN_BASELINE), // GEORGIAN CAPITAL LETTER EN
new Spec(GREEK, new int[] {GREEK, 0x3f0, 0x1f00, 0x1fff}, 0x39e , Font.ROMAN_BASELINE), // GREEK CAPITAL LETTER XI
new Spec(LATIN, new int[] {LATIN, 0x2af, 0x1d00, 0x1d7f, 0x1e00, 0x1eff, 0xfb00, 0xfb4f}, 0x49 , Font.ROMAN_BASELINE), // LATIN CAPITAL LETTER I
// African Scripts
new Spec(ETHIOPIC, new int[] {ETHIOPIC, 0x139f, 0x2d80, 0x2ddf}, 0x1260 , Font.ROMAN_BASELINE), // ETHIOPIC SYLLABLE BA
// NKo = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
new Spec(TIFINAGH, new int[] {TIFINAGH, 0x2d7f}, 0x2d4a , Font.ROMAN_BASELINE), // TIFINAGH LETTER YAZH
// Middle Eastern Scripts
new Spec(ARABIC, new int[] {ARABIC, 0x6ff, 0xfb50, 0xfdff, 0xfe70, 0xfeff}, 0x6a1 , Font.ROMAN_BASELINE), // ARABIC LETTER DOTLESS FEH
new Spec(HEBREW, new int[] {HEBREW, 0x5ff}, 0x5d3 , Font.ROMAN_BASELINE), // HEBREW LETTER DALET
new Spec(SYRIAC, new int[] {SYRIAC, 0x74f}, 0x716 , Font.ROMAN_BASELINE), // SYRIAC LETTER DOTLESS DALATH RISH
new Spec(THAANA, new int[] {THAANA, 0x7bf}, 0x782 , Font.ROMAN_BASELINE), // THAANA LETTER NOONU
// American Scripts
/*
CanadianSyllabics = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Cherokee = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Deseret = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// Other Scripts
Shavian = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Osmanya = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Glagolitic = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// Indic Scripts
Bengali = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
*/
new Spec(DEVANAGARI, new int[] {DEVANAGARI, 0x97f}, 0x917 , Font.ROMAN_BASELINE), // DEVANAGARI LETTER GA
new Spec(GUJARATI, new int[] {GUJARATI, 0xaff}, 0xabe , Font.ROMAN_BASELINE), // GUJARATI VOWEL SIGN AA
new Spec(GURMUKHI, new int[] {GURMUKHI, 0xa7f}, 0xa38 , Font.ROMAN_BASELINE), // GURMUKHI LETTER SA
//Kannada = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Limbu = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Malayalam = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Oriya = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Sinhala = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//SylotiNagri = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
new Spec(TAMIL, new int[] {TAMIL, 0xb8f}, 0xbaa , Font.ROMAN_BASELINE), // TAMIL LETTER PA
//Telugu = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// Philippine Scripts
//Buhid = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// Hanunoo = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// Tagalog = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// Tagbanwa = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// South East Asian Scripts
//Buginese = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Balinese = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Khmer = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Lao = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//Myanmar = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
//NewTaiLue = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
// TaiLe = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
new Spec(THAI, new int[] {THAI, 0xe70}, 0xe1a , Font.ROMAN_BASELINE), // THAI CHARACTER BO BAIMAI
// East Asian Scripts
new Spec(HAN, new int[] {HAN,0xfff, 0x3190,0x319f, 0x4e00,0x9fff, 0xf900,0xfaff, 0x3400,0x4dbf, 0x20000,0x2a6df, 0x2f800,0x2fa10}, 0x2f01 , Font.ROMAN_BASELINE), // KANGXI RADICAL LINE
new Spec(BOPOMOFO, new int[] {BOPOMOFO,0x312f, 0x31a0,0x31bf}, 0x3107 , Font.ROMAN_BASELINE), // BOPOMOFO LETTER M
new Spec(HIRAGANA, new int[] {HIRAGANA,0x309f}, 0x305b , Font.ROMAN_BASELINE), // HRAGANA LETTER SE
new Spec(KATAKANA, new int[] {KATAKANA,0x30ff, 0xff00,0xffe0, 0x31f0,0x31ff}, 0x30f1 , Font.ROMAN_BASELINE), // KATAKANA LETTER WE
new Spec(HANGUL, new int[] {HANGUL, 0x11f0}, 0x1100 , Font.ROMAN_BASELINE), // HANGUL CHOSEON KIYEOK
new Spec(YI, new int[] {YI, 0xA4cf}, 0xa490 , Font.ROMAN_BASELINE), // YI RADICAL QOT
// Central Asian
//Kharoshthi = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
new Spec(MONGOLIAN, new int[] {MONGOLIAN, 0x18a0}, 0x1882 , Font.ROMAN_BASELINE), // MONGOLIAN LETTER ALI GALI DAMARU
//PhagsPa = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
new Spec(TIBETAN, new int[] {TIBETAN, 0xfff}, 0xf46 , Font.ROMAN_BASELINE), // TIBETAN LETTER CHA
// Ancient Scripts
/*
AncientGreek = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Cuneiform = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
OldPersian = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Ugaritic = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
LinearB = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
AegeanNumbers = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
CountingRodNumbers = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
CypriotSyllabary = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Gothic = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
OldItalic = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
Ogham = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //*/
new Spec(RUNIC, new int[] { RUNIC, 0x16ff}, 0x16c1, Font.ROMAN_BASELINE), // RUNIC LETTER ISAZ IS ISS I
//Phoenician = { 0x, 0x, 0x , Font.ROMAN_BASELINE), //
}
;
/**
* Prevent instance creation
*/
private ScriptSystem() {
}
/**
* Returns the script system of the specified char.
* If the script system can not be determined, LATIN is
* returned.
*/
public static int getScriptSystemOf(char ch) {
// FIXME This takes linear time. Instead of this
// algorithm, we could take advantage of the fact
// that all Unicode script systems start at a 16 bit
// interval (ch modulo 16).
for (int i=0, n = systems.length; i < n; i++) {
for (int j=0, m = systems[i].ranges.length; j < m; j+=2) {
if (ch >= systems[i].ranges[j] && ch <= systems[i].ranges[j + 1]) {
return systems[i].system;
}
}
}
return LATIN;
}
/**
* Returns the best character of the specified script system
* for measuring perceived ascent and perceived descent of the
* script.
*/
public static char getMeasurementChar(int system) {
// FIXME This takes linear time. Instead of this
// algorithm, we should use a HashMap.
for (int i=0, n = systems.length; i < n; i++) {
if (systems[i].system == system) {
return (char) systems[i].measurementChar;
}
}
return 'X';
}
/**
* Returns the baseline of the specified script system.
* java.awt.Font.ROMAN_BASELINE, CENTER_BASELINE or HANGING_BASELINE
*/
public static int getBaseline(int system) {
// FIXME This takes linear time. Instead of this
// algorithm, we should use a HashMap.
for (int i=0, n = systems.length; i < n; i++) {
if (systems[i].system == system) {
return systems[i].baseline;
}
}
return Font.ROMAN_BASELINE;
}
}