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author | Carlos Tadeu Panato Junior <ctadeu@gmail.com> | 2018-06-14 19:27:21 +0200 |
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committer | GitHub <noreply@github.com> | 2018-06-14 19:27:21 +0200 |
commit | c8b99b97dffbc7c96b3911f6301f0ec69399cea2 (patch) | |
tree | ec8fd6b1b8b9dc09c516d17419bcb01287815dcd /vendor/github.com/mattn/go-runewidth/runewidth_posix.go | |
parent | 8883f487886f8ad6b1529372fa467aaa7aeed5ec (diff) | |
download | chat-c8b99b97dffbc7c96b3911f6301f0ec69399cea2.tar.gz chat-c8b99b97dffbc7c96b3911f6301f0ec69399cea2.tar.bz2 chat-c8b99b97dffbc7c96b3911f6301f0ec69399cea2.zip |
Update html2text lib to use the original repo (#8900)
Diffstat (limited to 'vendor/github.com/mattn/go-runewidth/runewidth_posix.go')
-rw-r--r-- | vendor/github.com/mattn/go-runewidth/runewidth_posix.go | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/vendor/github.com/mattn/go-runewidth/runewidth_posix.go b/vendor/github.com/mattn/go-runewidth/runewidth_posix.go new file mode 100644 index 000000000..c579e9a31 --- /dev/null +++ b/vendor/github.com/mattn/go-runewidth/runewidth_posix.go @@ -0,0 +1,77 @@ +// +build !windows,!js + +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_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) +} |