1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
|
package whatlanggo
import "unicode"
type scriptCounter struct {
checkFunc func(r rune) bool
script *unicode.RangeTable
count int
}
// Scripts is the set of Unicode script tables.
var Scripts = map[*unicode.RangeTable]string{
unicode.Arabic: "Arabic",
unicode.Bengali: "Bengali",
unicode.Cyrillic: "Cyrillic",
unicode.Ethiopic: "Ethiopic",
unicode.Devanagari: "Devanagari",
unicode.Han: "Han",
unicode.Georgian: "Georgian",
unicode.Greek: "Greek",
unicode.Gujarati: "Gujarati",
unicode.Gurmukhi: "Gurmukhi",
unicode.Hangul: "Hangul",
unicode.Hebrew: "Hebrew",
unicode.Hiragana: "Hiragana",
unicode.Kannada: "Kannada",
unicode.Katakana: "Katakana",
unicode.Khmer: "Khmer",
unicode.Latin: "Latin",
unicode.Malayalam: "Malayalam",
unicode.Myanmar: "Myanmar",
unicode.Oriya: "Oriya",
unicode.Sinhala: "Sinhala",
unicode.Tamil: "Tamil",
unicode.Telugu: "Telugu",
unicode.Thai: "Thai",
}
// DetectScript returns only the script of the given text.
func DetectScript(text string) *unicode.RangeTable {
halfLen := len(text) / 2
scriptCounter := []scriptCounter{
{isLatin, unicode.Latin, 0},
{isCyrillic, unicode.Cyrillic, 0},
{isArabic, unicode.Arabic, 0},
{isDevanagari, unicode.Devanagari, 0},
{isHiraganaKatakana, _HiraganaKatakana, 0},
{isEthiopic, unicode.Ethiopic, 0},
{isHebrew, unicode.Hebrew, 0},
{isBengali, unicode.Bengali, 0},
{isGeorgian, unicode.Georgian, 0},
{isHan, unicode.Han, 0},
{isHangul, unicode.Hangul, 0},
{isGreek, unicode.Greek, 0},
{isKannada, unicode.Kannada, 0},
{isTamil, unicode.Tamil, 0},
{isThai, unicode.Thai, 0},
{isGujarati, unicode.Gujarati, 0},
{isGurmukhi, unicode.Gurmukhi, 0},
{isTelugu, unicode.Telugu, 0},
{isMalayalam, unicode.Malayalam, 0},
{isOriya, unicode.Oriya, 0},
{isMyanmar, unicode.Myanmar, 0},
{isSinhala, unicode.Sinhala, 0},
{isKhmer, unicode.Khmer, 0},
}
for _, ch := range text {
if isStopChar(ch) {
continue
}
for i, sc := range scriptCounter {
if sc.checkFunc(ch) {
scriptCounter[i].count++
if scriptCounter[i].count > halfLen {
return sc.script
}
//if script is found, move it closer to the front so that it be checked first.
if i > 0 {
scriptCounter[i], scriptCounter[i-1] = scriptCounter[i-1], scriptCounter[i]
}
}
}
}
//find the script that occurs the most in the text and return it.
jpCount := 0
max := 0
maxScript := &unicode.RangeTable{}
for _, script := range scriptCounter {
if script.count > max {
max = script.count
maxScript = script.script
if script.script == _HiraganaKatakana {
jpCount = max
}
}
}
switch {
case max == 0:
//if no valid script is detected, return nil.
return nil
case max != 0 && (maxScript == unicode.Han && jpCount > 0):
// If Hiragana or Katakana is included, even if judged as Mandarin,
// it is regarded as Japanese. Japanese uses Kanji (unicode.Han)
// in addition to Hiragana and Katakana.
return _HiraganaKatakana
default:
return maxScript
}
}
var isCyrillic = func(r rune) bool {
return unicode.Is(unicode.Cyrillic, r)
}
var isLatin = func(r rune) bool {
return unicode.Is(unicode.Latin, r)
}
var isArabic = func(r rune) bool {
return unicode.Is(unicode.Arabic, r)
}
var isDevanagari = func(r rune) bool {
return unicode.Is(unicode.Devanagari, r)
}
var isEthiopic = func(r rune) bool {
return unicode.Is(unicode.Ethiopic, r)
}
var isHebrew = func(r rune) bool {
return unicode.Is(unicode.Hebrew, r)
}
var isHan = func(r rune) bool {
return unicode.Is(unicode.Han, r)
}
var isBengali = func(r rune) bool {
return unicode.Is(unicode.Bengali, r)
}
var isHiraganaKatakana = func(r rune) bool {
return unicode.Is(_HiraganaKatakana, r)
}
var isHangul = func(r rune) bool {
return unicode.Is(unicode.Hangul, r)
}
var isGreek = func(r rune) bool {
return unicode.Is(unicode.Greek, r)
}
var isKannada = func(r rune) bool {
return unicode.Is(unicode.Kannada, r)
}
var isTamil = func(r rune) bool {
return unicode.Is(unicode.Tamil, r)
}
var isThai = func(r rune) bool {
return unicode.Is(unicode.Thai, r)
}
var isGujarati = func(r rune) bool {
return unicode.Is(unicode.Gujarati, r)
}
var isGurmukhi = func(r rune) bool {
return unicode.Is(unicode.Gurmukhi, r)
}
var isTelugu = func(r rune) bool {
return unicode.Is(unicode.Telugu, r)
}
var isMalayalam = func(r rune) bool {
return unicode.Is(unicode.Malayalam, r)
}
var isOriya = func(r rune) bool {
return unicode.Is(unicode.Oriya, r)
}
var isMyanmar = func(r rune) bool {
return unicode.Is(unicode.Myanmar, r)
}
var isSinhala = func(r rune) bool {
return unicode.Is(unicode.Sinhala, r)
}
var isKhmer = func(r rune) bool {
return unicode.Is(unicode.Khmer, r)
}
var isGeorgian = func(r rune) bool {
return unicode.Is(unicode.Georgian, r)
}
|