diff options
Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/github.com/mattn/go-runewidth@v0.0.12/runewidth_posix.go | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/github.com/mattn/go-runewidth@v0.0.12/runewidth_posix.go b/dependencies/pkg/mod/github.com/mattn/go-runewidth@v0.0.12/runewidth_posix.go new file mode 100644 index 0000000..480ad74 --- /dev/null +++ b/dependencies/pkg/mod/github.com/mattn/go-runewidth@v0.0.12/runewidth_posix.go @@ -0,0 +1,82 @@ +// +build !windows +// +build !js +// +build !appengine + +package runewidth + +import ( + "os" + "regexp" + "strings" +) + +var reLoc = regexp.MustCompile(`^[a-z][a-z][a-z]?(?:_[A-Z][A-Z])?\.(.+)`) + +var mblenTable = map[string]int{ + "utf-8": 6, + "utf8": 6, + "jis": 8, + "eucjp": 3, + "euckr": 2, + "euccn": 2, + "sjis": 2, + "cp932": 2, + "cp51932": 2, + "cp936": 2, + "cp949": 2, + "cp950": 2, + "big5": 2, + "gbk": 2, + "gb2312": 2, +} + +func isEastAsian(locale string) bool { + charset := strings.ToLower(locale) + r := reLoc.FindStringSubmatch(locale) + if len(r) == 2 { + charset = strings.ToLower(r[1]) + } + + if strings.HasSuffix(charset, "@cjk_narrow") { + return false + } + + for pos, b := range []byte(charset) { + if b == '@' { + charset = charset[:pos] + break + } + } + max := 1 + if m, ok := mblenTable[charset]; ok { + max = m + } + if max > 1 && (charset[0] != 'u' || + strings.HasPrefix(locale, "ja") || + strings.HasPrefix(locale, "ko") || + strings.HasPrefix(locale, "zh")) { + return true + } + return false +} + +// IsEastAsian return true if the current locale is CJK +func IsEastAsian() bool { + locale := os.Getenv("LC_ALL") + if locale == "" { + locale = os.Getenv("LC_CTYPE") + } + if locale == "" { + locale = os.Getenv("LANG") + } + + // ignore C locale + if locale == "POSIX" || locale == "C" { + return false + } + if len(locale) > 1 && locale[0] == 'C' && (locale[1] == '.' || locale[1] == '-') { + return false + } + + return isEastAsian(locale) +} |