diff options
Diffstat (limited to 'Godeps/_workspace/src/github.com/mattn/go-runewidth/runewidth.go')
| -rw-r--r-- | Godeps/_workspace/src/github.com/mattn/go-runewidth/runewidth.go | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/mattn/go-runewidth/runewidth.go b/Godeps/_workspace/src/github.com/mattn/go-runewidth/runewidth.go new file mode 100644 index 000000000..0b417db15 --- /dev/null +++ b/Godeps/_workspace/src/github.com/mattn/go-runewidth/runewidth.go @@ -0,0 +1,404 @@ +package runewidth + +var EastAsianWidth = IsEastAsian() +var DefaultCondition = &Condition{EastAsianWidth} + +type interval struct { + first rune + last rune +} + +var combining = []interval{ + {0x0300, 0x036F}, {0x0483, 0x0486}, {0x0488, 0x0489}, + {0x0591, 0x05BD}, {0x05BF, 0x05BF}, {0x05C1, 0x05C2}, + {0x05C4, 0x05C5}, {0x05C7, 0x05C7}, {0x0600, 0x0603}, + {0x0610, 0x0615}, {0x064B, 0x065E}, {0x0670, 0x0670}, + {0x06D6, 0x06E4}, {0x06E7, 0x06E8}, {0x06EA, 0x06ED}, + {0x070F, 0x070F}, {0x0711, 0x0711}, {0x0730, 0x074A}, + {0x07A6, 0x07B0}, {0x07EB, 0x07F3}, {0x0901, 0x0902}, + {0x093C, 0x093C}, {0x0941, 0x0948}, {0x094D, 0x094D}, + {0x0951, 0x0954}, {0x0962, 0x0963}, {0x0981, 0x0981}, + {0x09BC, 0x09BC}, {0x09C1, 0x09C4}, {0x09CD, 0x09CD}, + {0x09E2, 0x09E3}, {0x0A01, 0x0A02}, {0x0A3C, 0x0A3C}, + {0x0A41, 0x0A42}, {0x0A47, 0x0A48}, {0x0A4B, 0x0A4D}, + {0x0A70, 0x0A71}, {0x0A81, 0x0A82}, {0x0ABC, 0x0ABC}, + {0x0AC1, 0x0AC5}, {0x0AC7, 0x0AC8}, {0x0ACD, 0x0ACD}, + {0x0AE2, 0x0AE3}, {0x0B01, 0x0B01}, {0x0B3C, 0x0B3C}, + {0x0B3F, 0x0B3F}, {0x0B41, 0x0B43}, {0x0B4D, 0x0B4D}, + {0x0B56, 0x0B56}, {0x0B82, 0x0B82}, {0x0BC0, 0x0BC0}, + {0x0BCD, 0x0BCD}, {0x0C3E, 0x0C40}, {0x0C46, 0x0C48}, + {0x0C4A, 0x0C4D}, {0x0C55, 0x0C56}, {0x0CBC, 0x0CBC}, + {0x0CBF, 0x0CBF}, {0x0CC6, 0x0CC6}, {0x0CCC, 0x0CCD}, + {0x0CE2, 0x0CE3}, {0x0D41, 0x0D43}, {0x0D4D, 0x0D4D}, + {0x0DCA, 0x0DCA}, {0x0DD2, 0x0DD4}, {0x0DD6, 0x0DD6}, + {0x0E31, 0x0E31}, {0x0E34, 0x0E3A}, {0x0E47, 0x0E4E}, + {0x0EB1, 0x0EB1}, {0x0EB4, 0x0EB9}, {0x0EBB, 0x0EBC}, + {0x0EC8, 0x0ECD}, {0x0F18, 0x0F19}, {0x0F35, 0x0F35}, + {0x0F37, 0x0F37}, {0x0F39, 0x0F39}, {0x0F71, 0x0F7E}, + {0x0F80, 0x0F84}, {0x0F86, 0x0F87}, {0x0F90, 0x0F97}, + {0x0F99, 0x0FBC}, {0x0FC6, 0x0FC6}, {0x102D, 0x1030}, + {0x1032, 0x1032}, {0x1036, 0x1037}, {0x1039, 0x1039}, + {0x1058, 0x1059}, {0x1160, 0x11FF}, {0x135F, 0x135F}, + {0x1712, 0x1714}, {0x1732, 0x1734}, {0x1752, 0x1753}, + {0x1772, 0x1773}, {0x17B4, 0x17B5}, {0x17B7, 0x17BD}, + {0x17C6, 0x17C6}, {0x17C9, 0x17D3}, {0x17DD, 0x17DD}, + {0x180B, 0x180D}, {0x18A9, 0x18A9}, {0x1920, 0x1922}, + {0x1927, 0x1928}, {0x1932, 0x1932}, {0x1939, 0x193B}, + {0x1A17, 0x1A18}, {0x1B00, 0x1B03}, {0x1B34, 0x1B34}, + {0x1B36, 0x1B3A}, {0x1B3C, 0x1B3C}, {0x1B42, 0x1B42}, + {0x1B6B, 0x1B73}, {0x1DC0, 0x1DCA}, {0x1DFE, 0x1DFF}, + {0x200B, 0x200F}, {0x202A, 0x202E}, {0x2060, 0x2063}, + {0x206A, 0x206F}, {0x20D0, 0x20EF}, {0x302A, 0x302F}, + {0x3099, 0x309A}, {0xA806, 0xA806}, {0xA80B, 0xA80B}, + {0xA825, 0xA826}, {0xFB1E, 0xFB1E}, {0xFE00, 0xFE0F}, + {0xFE20, 0xFE23}, {0xFEFF, 0xFEFF}, {0xFFF9, 0xFFFB}, + {0x10A01, 0x10A03}, {0x10A05, 0x10A06}, {0x10A0C, 0x10A0F}, + {0x10A38, 0x10A3A}, {0x10A3F, 0x10A3F}, {0x1D167, 0x1D169}, + {0x1D173, 0x1D182}, {0x1D185, 0x1D18B}, {0x1D1AA, 0x1D1AD}, + {0x1D242, 0x1D244}, {0xE0001, 0xE0001}, {0xE0020, 0xE007F}, + {0xE0100, 0xE01EF}, +} + +type ctype int + +const ( + narrow ctype = iota + ambiguous + wide + halfwidth + fullwidth + neutral +) + +type intervalType struct { + first rune + last rune + ctype ctype +} + +var ctypes = []intervalType{ + {0x0020, 0x007E, narrow}, + {0x00A1, 0x00A1, ambiguous}, + {0x00A2, 0x00A3, narrow}, + {0x00A4, 0x00A4, ambiguous}, + {0x00A5, 0x00A6, narrow}, + {0x00A7, 0x00A8, ambiguous}, + {0x00AA, 0x00AA, ambiguous}, + {0x00AC, 0x00AC, narrow}, + {0x00AD, 0x00AE, ambiguous}, + {0x00AF, 0x00AF, narrow}, + {0x00B0, 0x00B4, ambiguous}, + {0x00B6, 0x00BA, ambiguous}, + {0x00BC, 0x00BF, ambiguous}, + {0x00C6, 0x00C6, ambiguous}, + {0x00D0, 0x00D0, ambiguous}, + {0x00D7, 0x00D8, ambiguous}, + {0x00DE, 0x00E1, ambiguous}, + {0x00E6, 0x00E6, ambiguous}, + {0x00E8, 0x00EA, ambiguous}, + {0x00EC, 0x00ED, ambiguous}, + {0x00F0, 0x00F0, ambiguous}, + {0x00F2, 0x00F3, ambiguous}, + {0x00F7, 0x00FA, ambiguous}, + {0x00FC, 0x00FC, ambiguous}, + {0x00FE, 0x00FE, ambiguous}, + {0x0101, 0x0101, ambiguous}, + {0x0111, 0x0111, ambiguous}, + {0x0113, 0x0113, ambiguous}, + {0x011B, 0x011B, ambiguous}, + {0x0126, 0x0127, ambiguous}, + {0x012B, 0x012B, ambiguous}, + {0x0131, 0x0133, ambiguous}, + {0x0138, 0x0138, ambiguous}, + {0x013F, 0x0142, ambiguous}, + {0x0144, 0x0144, ambiguous}, + {0x0148, 0x014B, ambiguous}, + {0x014D, 0x014D, ambiguous}, + {0x0152, 0x0153, ambiguous}, + {0x0166, 0x0167, ambiguous}, + {0x016B, 0x016B, ambiguous}, + {0x01CE, 0x01CE, ambiguous}, + {0x01D0, 0x01D0, ambiguous}, + {0x01D2, 0x01D2, ambiguous}, + {0x01D4, 0x01D4, ambiguous}, + {0x01D6, 0x01D6, ambiguous}, + {0x01D8, 0x01D8, ambiguous}, + {0x01DA, 0x01DA, ambiguous}, + {0x01DC, 0x01DC, ambiguous}, + {0x0251, 0x0251, ambiguous}, + {0x0261, 0x0261, ambiguous}, + {0x02C4, 0x02C4, ambiguous}, + {0x02C7, 0x02C7, ambiguous}, + {0x02C9, 0x02CB, ambiguous}, + {0x02CD, 0x02CD, ambiguous}, + {0x02D0, 0x02D0, ambiguous}, + {0x02D8, 0x02DB, ambiguous}, + {0x02DD, 0x02DD, ambiguous}, + {0x02DF, 0x02DF, ambiguous}, + {0x0300, 0x036F, ambiguous}, + {0x0391, 0x03A2, ambiguous}, + {0x03A3, 0x03A9, ambiguous}, + {0x03B1, 0x03C1, ambiguous}, + {0x03C3, 0x03C9, ambiguous}, + {0x0401, 0x0401, ambiguous}, + {0x0410, 0x044F, ambiguous}, + {0x0451, 0x0451, ambiguous}, + {0x1100, 0x115F, wide}, + {0x2010, 0x2010, ambiguous}, + {0x2013, 0x2016, ambiguous}, + {0x2018, 0x2019, ambiguous}, + {0x201C, 0x201D, ambiguous}, + {0x2020, 0x2022, ambiguous}, + {0x2024, 0x2027, ambiguous}, + {0x2030, 0x2030, ambiguous}, + {0x2032, 0x2033, ambiguous}, + {0x2035, 0x2035, ambiguous}, + {0x203B, 0x203B, ambiguous}, + {0x203E, 0x203E, ambiguous}, + {0x2074, 0x2074, ambiguous}, + {0x207F, 0x207F, ambiguous}, + {0x2081, 0x2084, ambiguous}, + {0x20A9, 0x20A9, halfwidth}, + {0x20AC, 0x20AC, ambiguous}, + {0x2103, 0x2103, ambiguous}, + {0x2105, 0x2105, ambiguous}, + {0x2109, 0x2109, ambiguous}, + {0x2113, 0x2113, ambiguous}, + {0x2116, 0x2116, ambiguous}, + {0x2121, 0x2122, ambiguous}, + {0x2126, 0x2126, ambiguous}, + {0x212B, 0x212B, ambiguous}, + {0x2153, 0x2154, ambiguous}, + {0x215B, 0x215E, ambiguous}, + {0x2160, 0x216B, ambiguous}, + {0x2170, 0x2179, ambiguous}, + {0x2189, 0x218A, ambiguous}, + {0x2190, 0x2199, ambiguous}, + {0x21B8, 0x21B9, ambiguous}, + {0x21D2, 0x21D2, ambiguous}, + {0x21D4, 0x21D4, ambiguous}, + {0x21E7, 0x21E7, ambiguous}, + {0x2200, 0x2200, ambiguous}, + {0x2202, 0x2203, ambiguous}, + {0x2207, 0x2208, ambiguous}, + {0x220B, 0x220B, ambiguous}, + {0x220F, 0x220F, ambiguous}, + {0x2211, 0x2211, ambiguous}, + {0x2215, 0x2215, ambiguous}, + {0x221A, 0x221A, ambiguous}, + {0x221D, 0x2220, ambiguous}, + {0x2223, 0x2223, ambiguous}, + {0x2225, 0x2225, ambiguous}, + {0x2227, 0x222C, ambiguous}, + {0x222E, 0x222E, ambiguous}, + {0x2234, 0x2237, ambiguous}, + {0x223C, 0x223D, ambiguous}, + {0x2248, 0x2248, ambiguous}, + {0x224C, 0x224C, ambiguous}, + {0x2252, 0x2252, ambiguous}, + {0x2260, 0x2261, ambiguous}, + {0x2264, 0x2267, ambiguous}, + {0x226A, 0x226B, ambiguous}, + {0x226E, 0x226F, ambiguous}, + {0x2282, 0x2283, ambiguous}, + {0x2286, 0x2287, ambiguous}, + {0x2295, 0x2295, ambiguous}, + {0x2299, 0x2299, ambiguous}, + {0x22A5, 0x22A5, ambiguous}, + {0x22BF, 0x22BF, ambiguous}, + {0x2312, 0x2312, ambiguous}, + {0x2329, 0x232A, wide}, + {0x2460, 0x24E9, ambiguous}, + {0x24EB, 0x254B, ambiguous}, + {0x2550, 0x2573, ambiguous}, + {0x2580, 0x258F, ambiguous}, + {0x2592, 0x2595, ambiguous}, + {0x25A0, 0x25A1, ambiguous}, + {0x25A3, 0x25A9, ambiguous}, + {0x25B2, 0x25B3, ambiguous}, + {0x25B6, 0x25B7, ambiguous}, + {0x25BC, 0x25BD, ambiguous}, + {0x25C0, 0x25C1, ambiguous}, + {0x25C6, 0x25C8, ambiguous}, + {0x25CB, 0x25CB, ambiguous}, + {0x25CE, 0x25D1, ambiguous}, + {0x25E2, 0x25E5, ambiguous}, + {0x25EF, 0x25EF, ambiguous}, + {0x2605, 0x2606, ambiguous}, + {0x2609, 0x2609, ambiguous}, + {0x260E, 0x260F, ambiguous}, + {0x2614, 0x2615, ambiguous}, + {0x261C, 0x261C, ambiguous}, + {0x261E, 0x261E, ambiguous}, + {0x2640, 0x2640, ambiguous}, + {0x2642, 0x2642, ambiguous}, + {0x2660, 0x2661, ambiguous}, + {0x2663, 0x2665, ambiguous}, + {0x2667, 0x266A, ambiguous}, + {0x266C, 0x266D, ambiguous}, + {0x266F, 0x266F, ambiguous}, + {0x269E, 0x269F, ambiguous}, + {0x26BE, 0x26BF, ambiguous}, + {0x26C4, 0x26CD, ambiguous}, + {0x26CF, 0x26E1, ambiguous}, + {0x26E3, 0x26E3, ambiguous}, + {0x26E8, 0x26FF, ambiguous}, + {0x273D, 0x273D, ambiguous}, + {0x2757, 0x2757, ambiguous}, + {0x2776, 0x277F, ambiguous}, + {0x27E6, 0x27ED, narrow}, + {0x2985, 0x2986, narrow}, + {0x2B55, 0x2B59, ambiguous}, + {0x2E80, 0x2E9A, wide}, + {0x2E9B, 0x2EF4, wide}, + {0x2F00, 0x2FD6, wide}, + {0x2FF0, 0x2FFC, wide}, + {0x3000, 0x3000, fullwidth}, + {0x3001, 0x303E, wide}, + {0x3041, 0x3097, wide}, + {0x3099, 0x3100, wide}, + {0x3105, 0x312E, wide}, + {0x3131, 0x318F, wide}, + {0x3190, 0x31BB, wide}, + {0x31C0, 0x31E4, wide}, + {0x31F0, 0x321F, wide}, + {0x3220, 0x3247, wide}, + {0x3248, 0x324F, ambiguous}, + {0x3250, 0x32FF, wide}, + {0x3300, 0x4DBF, wide}, + {0x4E00, 0xA48D, wide}, + {0xA490, 0xA4C7, wide}, + {0xA960, 0xA97D, wide}, + {0xAC00, 0xD7A4, wide}, + {0xE000, 0xF8FF, ambiguous}, + {0xF900, 0xFAFF, wide}, + {0xFE00, 0xFE0F, ambiguous}, + {0xFE10, 0xFE1A, wide}, + {0xFE30, 0xFE53, wide}, + {0xFE54, 0xFE67, wide}, + {0xFE68, 0xFE6C, wide}, + {0xFF01, 0xFF60, fullwidth}, + {0xFF61, 0xFFBF, halfwidth}, + {0xFFC2, 0xFFC8, halfwidth}, + {0xFFCA, 0xFFD0, halfwidth}, + {0xFFD2, 0xFFD8, halfwidth}, + {0xFFDA, 0xFFDD, halfwidth}, + {0xFFE0, 0xFFE7, fullwidth}, + {0xFFE8, 0xFFEF, halfwidth}, + {0xFFFD, 0xFFFE, ambiguous}, + {0x1B000, 0x1B002, wide}, + {0x1F100, 0x1F10A, ambiguous}, + {0x1F110, 0x1F12D, ambiguous}, + {0x1F130, 0x1F169, ambiguous}, + {0x1F170, 0x1F19B, ambiguous}, + {0x1F200, 0x1F203, wide}, + {0x1F210, 0x1F23B, wide}, + {0x1F240, 0x1F249, wide}, + {0x1F250, 0x1F252, wide}, + {0x20000, 0x2FFFE, wide}, + {0x30000, 0x3FFFE, wide}, + {0xE0100, 0xE01F0, ambiguous}, + {0xF0000, 0xFFFFD, ambiguous}, + {0x100000, 0x10FFFE, ambiguous}, +} + +type Condition struct { + EastAsianWidth bool +} + +func NewCondition() *Condition { + return &Condition{EastAsianWidth} +} + +// RuneWidth returns the number of cells in r. +// See http://www.unicode.org/reports/tr11/ +func (c *Condition) RuneWidth(r rune) int { + if r == 0 { + return 0 + } + if r < 32 || (r >= 0x7f && r < 0xa0) { + return 1 + } + for _, iv := range combining { + if iv.first <= r && r <= iv.last { + return 0 + } + } + + if c.EastAsianWidth && IsAmbiguousWidth(r) { + return 2 + } + + if r >= 0x1100 && + (r <= 0x115f || r == 0x2329 || r == 0x232a || + (r >= 0x2e80 && r <= 0xa4cf && r != 0x303f) || + (r >= 0xac00 && r <= 0xd7a3) || + (r >= 0xf900 && r <= 0xfaff) || + (r >= 0xfe30 && r <= 0xfe6f) || + (r >= 0xff00 && r <= 0xff60) || + (r >= 0xffe0 && r <= 0xffe6) || + (r >= 0x20000 && r <= 0x2fffd) || + (r >= 0x30000 && r <= 0x3fffd)) { + return 2 + } + return 1 +} + +func (c *Condition) StringWidth(s string) (width int) { + for _, r := range []rune(s) { + width += c.RuneWidth(r) + } + return width +} + +func (c *Condition) Truncate(s string, w int, tail string) string { + r := []rune(s) + tw := StringWidth(tail) + w -= tw + width := 0 + i := 0 + for ; i < len(r); i++ { + cw := RuneWidth(r[i]) + if width+cw > w { + break + } + width += cw + } + if i == len(r) { + return string(r[0:i]) + } + return string(r[0:i]) + tail +} + +// RuneWidth returns the number of cells in r. +// See http://www.unicode.org/reports/tr11/ +func RuneWidth(r rune) int { + return DefaultCondition.RuneWidth(r) +} + +func ct(r rune) ctype { + for _, iv := range ctypes { + if iv.first <= r && r <= iv.last { + return iv.ctype + } + } + return neutral +} + +// IsAmbiguousWidth returns whether is ambiguous width or not. +func IsAmbiguousWidth(r rune) bool { + return ct(r) == ambiguous +} + +// IsAmbiguousWidth returns whether is ambiguous width or not. +func IsNeutralWidth(r rune) bool { + return ct(r) == neutral +} + +func StringWidth(s string) (width int) { + return DefaultCondition.StringWidth(s) +} + +func Truncate(s string, w int, tail string) string { + return DefaultCondition.Truncate(s, w, tail) +} |