vendored deps

vendor/github.com/mattn/go-runewidth/README.mkd

@@ -0,0 +1,26 @@
+go-runewidth
+============
+
+[![Build Status](https://travis-ci.org/mattn/go-runewidth.png?branch=master)](https://travis-ci.org/mattn/go-runewidth)
+[![Coverage Status](https://coveralls.io/repos/mattn/go-runewidth/badge.png?branch=HEAD)](https://coveralls.io/r/mattn/go-runewidth?branch=HEAD)
+[![GoDoc](https://godoc.org/github.com/mattn/go-runewidth?status.svg)](http://godoc.org/github.com/mattn/go-runewidth)
+
+Provides functions to get fixed width of the character or string.
+
+Usage
+-----
+
+```go
+runewidth.StringWidth("つのだ☆HIRO") == 12
+```
+
+
+Author
+------
+
+Yasuhiro Matsumoto
+
+License
+-------
+
+under the MIT License: http://mattn.mit-license.org/2013

vendor/github.com/mattn/go-runewidth/runewidth.go

@@ -0,0 +1,464 @@
+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 {
+	if c.StringWidth(s) <= w {
+		return s
+	}
+	r := []rune(s)
+	tw := c.StringWidth(tail)
+	w -= tw
+	width := 0
+	i := 0
+	for ; i < len(r); i++ {
+		cw := c.RuneWidth(r[i])
+		if width+cw > w {
+			break
+		}
+		width += cw
+	}
+	return string(r[0:i]) + tail
+}
+
+func (c *Condition) Wrap(s string, w int) string {
+	width := 0
+	out := ""
+	for _, r := range []rune(s) {
+		cw := RuneWidth(r)
+		if r == '\n' {
+			out += string(r)
+			width = 0
+			continue
+		} else if width+cw > w {
+			out += "\n"
+			width = 0
+			out += string(r)
+			width += cw
+			continue
+		}
+		out += string(r)
+		width += cw
+	}
+	return out
+}
+
+func (c *Condition) FillLeft(s string, w int) string {
+	width := c.StringWidth(s)
+	count := w - width
+	if count > 0 {
+		b := make([]byte, count)
+		for i := range b {
+			b[i] = ' '
+		}
+		return string(b) + s
+	}
+	return s
+}
+
+func (c *Condition) FillRight(s string, w int) string {
+	width := c.StringWidth(s)
+	count := w - width
+	if count > 0 {
+		b := make([]byte, count)
+		for i := range b {
+			b[i] = ' '
+		}
+		return s + string(b)
+	}
+	return s
+}
+
+// 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)
+}
+
+func Wrap(s string, w int) string {
+	return DefaultCondition.Wrap(s, w)
+}
+
+func FillLeft(s string, w int) string {
+	return DefaultCondition.FillLeft(s, w)
+}
+
+func FillRight(s string, w int) string {
+	return DefaultCondition.FillRight(s, w)
+}

vendor/github.com/mattn/go-runewidth/runewidth_js.go

@@ -0,0 +1,8 @@
+// +build js
+
+package runewidth
+
+func IsEastAsian() bool {
+	// TODO: Implement this for the web. Detect east asian in a compatible way, and return true.
+	return false
+}

vendor/github.com/mattn/go-runewidth/runewidth_posix.go

@@ -0,0 +1,69 @@
+// +build !windows,!js
+
+package runewidth
+
+import (
+	"os"
+	"regexp"
+	"strings"
+)
+
+var reLoc = regexp.MustCompile(`^[a-z][a-z][a-z]?(?:_[A-Z][A-Z])?\.(.+)`)
+
+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
+	}
+
+	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
+		}
+	}
+
+	mbc_max := 1
+	switch charset {
+	case "utf-8", "utf8":
+		mbc_max = 6
+	case "jis":
+		mbc_max = 8
+	case "eucjp":
+		mbc_max = 3
+	case "euckr", "euccn":
+		mbc_max = 2
+	case "sjis", "cp932", "cp51932", "cp936", "cp949", "cp950":
+		mbc_max = 2
+	case "big5":
+		mbc_max = 2
+	case "gbk", "gb2312":
+		mbc_max = 2
+	}
+
+	if mbc_max > 1 && (charset[0] != 'u' ||
+		strings.HasPrefix(locale, "ja") ||
+		strings.HasPrefix(locale, "ko") ||
+		strings.HasPrefix(locale, "zh")) {
+		return true
+	}
+	return false
+}

vendor/github.com/mattn/go-runewidth/runewidth_test.go

@@ -0,0 +1,229 @@
+package runewidth
+
+import (
+	"testing"
+)
+
+var runewidthtests = []struct {
+	in  rune
+	out int
+}{
+	{'世', 2},
+	{'界', 2},
+	{'ｾ', 1},
+	{'ｶ', 1},
+	{'ｲ', 1},
+	{'☆', 2}, // double width in ambiguous
+	{'\x00', 0},
+	{'\x01', 1},
+	{'\u0300', 0},
+}
+
+func TestRuneWidth(t *testing.T) {
+	c := NewCondition()
+	c.EastAsianWidth = true
+	for _, tt := range runewidthtests {
+		if out := c.RuneWidth(tt.in); out != tt.out {
+			t.Errorf("Width(%q) = %q, want %q", tt.in, out, tt.out)
+		}
+	}
+}
+
+var isambiguouswidthtests = []struct {
+	in  rune
+	out bool
+}{
+	{'世', false},
+	{'■', true},
+	{'界', false},
+	{'○', true},
+	{'㈱', false},
+	{'①', true},
+	{'②', true},
+	{'③', true},
+	{'④', true},
+	{'⑤', true},
+	{'⑥', true},
+	{'⑦', true},
+	{'⑧', true},
+	{'⑨', true},
+	{'⑩', true},
+	{'⑪', true},
+	{'⑫', true},
+	{'⑬', true},
+	{'⑭', true},
+	{'⑮', true},
+	{'⑯', true},
+	{'⑰', true},
+	{'⑱', true},
+	{'⑲', true},
+	{'⑳', true},
+	{'☆', true},
+}
+
+func TestIsAmbiguousWidth(t *testing.T) {
+	for _, tt := range isambiguouswidthtests {
+		if out := IsAmbiguousWidth(tt.in); out != tt.out {
+			t.Errorf("IsAmbiguousWidth(%q) = %q, want %q", tt.in, out, tt.out)
+		}
+	}
+}
+
+var stringwidthtests = []struct {
+	in  string
+	out int
+}{
+	{"■㈱の世界①", 12},
+	{"スター☆", 8},
+}
+
+func TestStringWidth(t *testing.T) {
+	c := NewCondition()
+	c.EastAsianWidth = true
+	for _, tt := range stringwidthtests {
+		if out := c.StringWidth(tt.in); out != tt.out {
+			t.Errorf("StringWidth(%q) = %q, want %q", tt.in, out, tt.out)
+		}
+	}
+}
+
+func TestStringWidthInvalid(t *testing.T) {
+	s := "こんにちわ\x00世界"
+	if out := StringWidth(s); out != 14 {
+		t.Errorf("StringWidth(%q) = %q, want %q", s, out, 14)
+	}
+}
+
+func TestTruncateSmaller(t *testing.T) {
+	s := "あいうえお"
+	expected := "あいうえお"
+
+	if out := Truncate(s, 10, "..."); out != expected {
+		t.Errorf("Truncate(%q) = %q, want %q", s, out, expected)
+	}
+}
+
+func TestTruncate(t *testing.T) {
+	s := "あいうえおあいうえおえおおおおおおおおおおおおおおおおおおおおおおおおおおおおおお"
+	expected := "あいうえおあいうえおえおおおおおおおおおおおおおおおおおおおおおおおおおおお..."
+
+	out := Truncate(s, 80, "...")
+	if out != expected {
+		t.Errorf("Truncate(%q) = %q, want %q", s, out, expected)
+	}
+	width := StringWidth(out)
+	if width != 79 {
+		t.Errorf("width of Truncate(%q) should be %d, but %d", s, 79, width)
+	}
+}
+
+func TestTruncateFit(t *testing.T) {
+	s := "aあいうえおあいうえおえおおおおおおおおおおおおおおおおおおおおおおおおおおおおおお"
+	expected := "aあいうえおあいうえおえおおおおおおおおおおおおおおおおおおおおおおおおおおお..."
+
+	out := Truncate(s, 80, "...")
+	if out != expected {
+		t.Errorf("Truncate(%q) = %q, want %q", s, out, expected)
+	}
+	width := StringWidth(out)
+	if width != 80 {
+		t.Errorf("width of Truncate(%q) should be %d, but %d", s, 80, width)
+	}
+}
+
+func TestTruncateJustFit(t *testing.T) {
+	s := "あいうえおあいうえおえおおおおおおおおおおおおおおおおおおおおおおおおおおおおお"
+	expected := "あいうえおあいうえおえおおおおおおおおおおおおおおおおおおおおおおおおおおおおお"
+
+	out := Truncate(s, 80, "...")
+	if out != expected {
+		t.Errorf("Truncate(%q) = %q, want %q", s, out, expected)
+	}
+	width := StringWidth(out)
+	if width != 80 {
+		t.Errorf("width of Truncate(%q) should be %d, but %d", s, 80, width)
+	}
+}
+
+func TestWrap(t *testing.T) {
+	s := `東京特許許可局局長はよく柿喰う客だ/東京特許許可局局長はよく柿喰う客だ
+123456789012345678901234567890
+
+END`
+	expected := `東京特許許可局局長はよく柿喰う
+客だ/東京特許許可局局長はよく
+柿喰う客だ
+123456789012345678901234567890
+
+END`
+
+	if out := Wrap(s, 30); out != expected {
+		t.Errorf("Wrap(%q) = %q, want %q", s, out, expected)
+	}
+}
+
+func TestTruncateNoNeeded(t *testing.T) {
+	s := "あいうえおあい"
+	expected := "あいうえおあい"
+
+	if out := Truncate(s, 80, "..."); out != expected {
+		t.Errorf("Truncate(%q) = %q, want %q", s, out, expected)
+	}
+}
+
+var isneutralwidthtests = []struct {
+	in  rune
+	out bool
+}{
+	{'→', false},
+	{'┊', false},
+	{'┈', false},
+	{'～', false},
+	{'└', false},
+	{'⣀', true},
+	{'⣀', true},
+}
+
+func TestIsNeutralWidth(t *testing.T) {
+	for _, tt := range isneutralwidthtests {
+		if out := IsNeutralWidth(tt.in); out != tt.out {
+			t.Errorf("IsNeutralWidth(%q) = %q, want %q", tt.in, out, tt.out)
+		}
+	}
+}
+
+func TestFillLeft(t *testing.T) {
+	s := "あxいうえお"
+	expected := "    あxいうえお"
+
+	if out := FillLeft(s, 15); out != expected {
+		t.Errorf("FillLeft(%q) = %q, want %q", s, out, expected)
+	}
+}
+
+func TestFillLeftFit(t *testing.T) {
+	s := "あいうえお"
+	expected := "あいうえお"
+
+	if out := FillLeft(s, 10); out != expected {
+		t.Errorf("FillLeft(%q) = %q, want %q", s, out, expected)
+	}
+}
+
+func TestFillRight(t *testing.T) {
+	s := "あxいうえお"
+	expected := "あxいうえお    "
+
+	if out := FillRight(s, 15); out != expected {
+		t.Errorf("FillRight(%q) = %q, want %q", s, out, expected)
+	}
+}
+
+func TestFillRightFit(t *testing.T) {
+	s := "あいうえお"
+	expected := "あいうえお"
+
+	if out := FillRight(s, 10); out != expected {
+		t.Errorf("FillRight(%q) = %q, want %q", s, out, expected)
+	}
+}

vendor/github.com/mattn/go-runewidth/runewidth_windows.go

@@ -0,0 +1,24 @@
+package runewidth
+
+import (
+	"syscall"
+)
+
+var (
+	kernel32               = syscall.NewLazyDLL("kernel32")
+	procGetConsoleOutputCP = kernel32.NewProc("GetConsoleOutputCP")
+)
+
+func IsEastAsian() bool {
+	r1, _, _ := procGetConsoleOutputCP.Call()
+	if r1 == 0 {
+		return false
+	}
+
+	switch int(r1) {
+	case 932, 51932, 936, 949, 950:
+		return true
+	}
+
+	return false
+}

vendor/github.com/nsf/termbox-go/AUTHORS

@@ -0,0 +1,4 @@
+# Please keep this file sorted.
+
+Georg Reinke <guelfey@googlemail.com>
+nsf <no.smile.face@gmail.com>

vendor/github.com/nsf/termbox-go/LICENSE

@@ -0,0 +1,19 @@
+Copyright (C) 2012 termbox-go authors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/nsf/termbox-go/README.md

@@ -0,0 +1,25 @@
+## Termbox
+Termbox is a library that provides a minimalistic API which allows the programmer to write text-based user interfaces. The library is crossplatform and has both terminal-based implementations on *nix operating systems and a winapi console based implementation for windows operating systems. The basic idea is an abstraction of the greatest common subset of features available on all major terminals and other terminal-like APIs in a minimalistic fashion. Small API means it is easy to implement, test, maintain and learn it, that's what makes the termbox a distinct library in its area.
+
+### Installation
+Install and update this go package with `go get -u github.com/nsf/termbox-go`
+
+### Examples
+For examples of what can be done take a look at demos in the _demos directory. You can try them with go run: `go run _demos/keyboard.go`
+
+There are also some interesting projects using termbox-go:
+ - [godit](https://github.com/nsf/godit) is an emacsish lightweight text editor written using termbox.
+ - [gomatrix](https://github.com/GeertJohan/gomatrix) connects to The Matrix and displays its data streams in your terminal.
+ - [gotetris](https://github.com/jjinux/gotetris) is an implementation of Tetris.
+ - [sokoban-go](https://github.com/rn2dy/sokoban-go) is an implementation of sokoban game.
+ - [hecate](https://github.com/evanmiller/hecate) is a hex editor designed by Satan.
+ - [httopd](https://github.com/verdverm/httopd) is top for httpd logs.
+ - [mop](https://github.com/michaeldv/mop) is stock market tracker for hackers.
+ - [termui](https://github.com/gizak/termui) is a terminal dashboard.
+ - [termloop](https://github.com/JoelOtter/termloop) is a terminal game engine.
+ - [xterm-color-chart](https://github.com/kutuluk/xterm-color-chart) is a XTerm 256 color chart.
+ - [gocui](https://github.com/jroimartin/gocui) is a minimalist Go library aimed at creating console user interfaces.
+ - [dry](https://github.com/moncho/dry) is an interactive cli to manage Docker containers.
+
+### API reference
+[godoc.org/github.com/nsf/termbox-go](http://godoc.org/github.com/nsf/termbox-go)

vendor/github.com/nsf/termbox-go/api.go

@@ -0,0 +1,459 @@
+// +build !windows
+
+package termbox
+
+import "github.com/mattn/go-runewidth"
+import "fmt"
+import "os"
+import "os/signal"
+import "syscall"
+import "runtime"
+
+// public API
+
+// Initializes termbox library. This function should be called before any other functions.
+// After successful initialization, the library must be finalized using 'Close' function.
+//
+// Example usage:
+//      err := termbox.Init()
+//      if err != nil {
+//              panic(err)
+//      }
+//      defer termbox.Close()
+func Init() error {
+	var err error
+
+	out, err = os.OpenFile("/dev/tty", syscall.O_WRONLY, 0)
+	if err != nil {
+		return err
+	}
+	in, err = syscall.Open("/dev/tty", syscall.O_RDONLY, 0)
+	if err != nil {
+		return err
+	}
+
+	err = setup_term()
+	if err != nil {
+		return fmt.Errorf("termbox: error while reading terminfo data: %v", err)
+	}
+
+	signal.Notify(sigwinch, syscall.SIGWINCH)
+	signal.Notify(sigio, syscall.SIGIO)
+
+	_, err = fcntl(in, syscall.F_SETFL, syscall.O_ASYNC|syscall.O_NONBLOCK)
+	if err != nil {
+		return err
+	}
+	_, err = fcntl(in, syscall.F_SETOWN, syscall.Getpid())
+	if runtime.GOOS != "darwin" && err != nil {
+		return err
+	}
+	err = tcgetattr(out.Fd(), &orig_tios)
+	if err != nil {
+		return err
+	}
+
+	tios := orig_tios
+	tios.Iflag &^= syscall_IGNBRK | syscall_BRKINT | syscall_PARMRK |
+		syscall_ISTRIP | syscall_INLCR | syscall_IGNCR |
+		syscall_ICRNL | syscall_IXON
+	tios.Oflag &^= syscall_OPOST
+	tios.Lflag &^= syscall_ECHO | syscall_ECHONL | syscall_ICANON |
+		syscall_ISIG | syscall_IEXTEN
+	tios.Cflag &^= syscall_CSIZE | syscall_PARENB
+	tios.Cflag |= syscall_CS8
+	tios.Cc[syscall_VMIN] = 1
+	tios.Cc[syscall_VTIME] = 0
+
+	err = tcsetattr(out.Fd(), &tios)
+	if err != nil {
+		return err
+	}
+
+	out.WriteString(funcs[t_enter_ca])
+	out.WriteString(funcs[t_enter_keypad])
+	out.WriteString(funcs[t_hide_cursor])
+	out.WriteString(funcs[t_clear_screen])
+
+	termw, termh = get_term_size(out.Fd())
+	back_buffer.init(termw, termh)
+	front_buffer.init(termw, termh)
+	back_buffer.clear()
+	front_buffer.clear()
+
+	go func() {
+		buf := make([]byte, 128)
+		for {
+			select {
+			case <-sigio:
+				for {
+					n, err := syscall.Read(in, buf)
+					if err == syscall.EAGAIN || err == syscall.EWOULDBLOCK {
+						break
+					}
+					select {
+					case input_comm <- input_event{buf[:n], err}:
+						ie := <-input_comm
+						buf = ie.data[:128]
+					case <-quit:
+						return
+					}
+				}
+			case <-quit:
+				return
+			}
+		}
+	}()
+
+	IsInit = true
+	return nil
+}
+
+// Interrupt an in-progress call to PollEvent by causing it to return
+// EventInterrupt.  Note that this function will block until the PollEvent
+// function has successfully been interrupted.
+func Interrupt() {
+	interrupt_comm <- struct{}{}
+}
+
+// Finalizes termbox library, should be called after successful initialization
+// when termbox's functionality isn't required anymore.
+func Close() {
+	quit <- 1
+	out.WriteString(funcs[t_show_cursor])
+	out.WriteString(funcs[t_sgr0])
+	out.WriteString(funcs[t_clear_screen])
+	out.WriteString(funcs[t_exit_ca])
+	out.WriteString(funcs[t_exit_keypad])
+	out.WriteString(funcs[t_exit_mouse])
+	tcsetattr(out.Fd(), &orig_tios)
+
+	out.Close()
+	syscall.Close(in)
+
+	// reset the state, so that on next Init() it will work again
+	termw = 0
+	termh = 0
+	input_mode = InputEsc
+	out = nil
+	in = 0
+	lastfg = attr_invalid
+	lastbg = attr_invalid
+	lastx = coord_invalid
+	lasty = coord_invalid
+	cursor_x = cursor_hidden
+	cursor_y = cursor_hidden
+	foreground = ColorDefault
+	background = ColorDefault
+	IsInit = false
+}
+
+// Synchronizes the internal back buffer with the terminal.
+func Flush() error {
+	// invalidate cursor position
+	lastx = coord_invalid
+	lasty = coord_invalid
+
+	update_size_maybe()
+
+	for y := 0; y < front_buffer.height; y++ {
+		line_offset := y * front_buffer.width
+		for x := 0; x < front_buffer.width; {
+			cell_offset := line_offset + x
+			back := &back_buffer.cells[cell_offset]
+			front := &front_buffer.cells[cell_offset]
+			if back.Ch < ' ' {
+				back.Ch = ' '
+			}
+			w := runewidth.RuneWidth(back.Ch)
+			if w == 0 || w == 2 && runewidth.IsAmbiguousWidth(back.Ch) {
+				w = 1
+			}
+			if *back == *front {
+				x += w
+				continue
+			}
+			*front = *back
+			send_attr(back.Fg, back.Bg)
+
+			if w == 2 && x == front_buffer.width-1 {
+				// there's not enough space for 2-cells rune,
+				// let's just put a space in there
+				send_char(x, y, ' ')
+			} else {
+				send_char(x, y, back.Ch)
+				if w == 2 {
+					next := cell_offset + 1
+					front_buffer.cells[next] = Cell{
+						Ch: 0,
+						Fg: back.Fg,
+						Bg: back.Bg,
+					}
+				}
+			}
+			x += w
+		}
+	}
+	if !is_cursor_hidden(cursor_x, cursor_y) {
+		write_cursor(cursor_x, cursor_y)
+	}
+	return flush()
+}
+
+// Sets the position of the cursor. See also HideCursor().
+func SetCursor(x, y int) {
+	if is_cursor_hidden(cursor_x, cursor_y) && !is_cursor_hidden(x, y) {
+		outbuf.WriteString(funcs[t_show_cursor])
+	}
+
+	if !is_cursor_hidden(cursor_x, cursor_y) && is_cursor_hidden(x, y) {
+		outbuf.WriteString(funcs[t_hide_cursor])
+	}
+
+	cursor_x, cursor_y = x, y
+	if !is_cursor_hidden(cursor_x, cursor_y) {
+		write_cursor(cursor_x, cursor_y)
+	}
+}
+
+// The shortcut for SetCursor(-1, -1).
+func HideCursor() {
+	SetCursor(cursor_hidden, cursor_hidden)
+}
+
+// Changes cell's parameters in the internal back buffer at the specified
+// position.
+func SetCell(x, y int, ch rune, fg, bg Attribute) {
+	if x < 0 || x >= back_buffer.width {
+		return
+	}
+	if y < 0 || y >= back_buffer.height {
+		return
+	}
+
+	back_buffer.cells[y*back_buffer.width+x] = Cell{ch, fg, bg}
+}
+
+// Returns a slice into the termbox's back buffer. You can get its dimensions
+// using 'Size' function. The slice remains valid as long as no 'Clear' or
+// 'Flush' function calls were made after call to this function.
+func CellBuffer() []Cell {
+	return back_buffer.cells
+}
+
+// After getting a raw event from PollRawEvent function call, you can parse it
+// again into an ordinary one using termbox logic. That is parse an event as
+// termbox would do it. Returned event in addition to usual Event struct fields
+// sets N field to the amount of bytes used within 'data' slice. If the length
+// of 'data' slice is zero or event cannot be parsed for some other reason, the
+// function will return a special event type: EventNone.
+//
+// IMPORTANT: EventNone may contain a non-zero N, which means you should skip
+// these bytes, because termbox cannot recognize them.
+//
+// NOTE: This API is experimental and may change in future.
+func ParseEvent(data []byte) Event {
+	event := Event{Type: EventKey}
+	ok := extract_event(data, &event)
+	if !ok {
+		return Event{Type: EventNone, N: event.N}
+	}
+	return event
+}
+
+// Wait for an event and return it. This is a blocking function call. Instead
+// of EventKey and EventMouse it returns EventRaw events. Raw event is written
+// into `data` slice and Event's N field is set to the amount of bytes written.
+// The minimum required length of the 'data' slice is 1. This requirement may
+// vary on different platforms.
+//
+// NOTE: This API is experimental and may change in future.
+func PollRawEvent(data []byte) Event {
+	if len(data) == 0 {
+		panic("len(data) >= 1 is a requirement")
+	}
+
+	var event Event
+	if extract_raw_event(data, &event) {
+		return event
+	}
+
+	for {
+		select {
+		case ev := <-input_comm:
+			if ev.err != nil {
+				return Event{Type: EventError, Err: ev.err}
+			}
+
+			inbuf = append(inbuf, ev.data...)
+			input_comm <- ev
+			if extract_raw_event(data, &event) {
+				return event
+			}
+		case <-interrupt_comm:
+			event.Type = EventInterrupt
+			return event
+
+		case <-sigwinch:
+			event.Type = EventResize
+			event.Width, event.Height = get_term_size(out.Fd())
+			return event
+		}
+	}
+}
+
+// Wait for an event and return it. This is a blocking function call.
+func PollEvent() Event {
+	var event Event
+
+	// try to extract event from input buffer, return on success
+	event.Type = EventKey
+	ok := extract_event(inbuf, &event)
+	if event.N != 0 {
+		copy(inbuf, inbuf[event.N:])
+		inbuf = inbuf[:len(inbuf)-event.N]
+	}
+	if ok {
+		return event
+	}
+
+	for {
+		select {
+		case ev := <-input_comm:
+			if ev.err != nil {
+				return Event{Type: EventError, Err: ev.err}
+			}
+
+			inbuf = append(inbuf, ev.data...)
+			input_comm <- ev
+			ok := extract_event(inbuf, &event)
+			if event.N != 0 {
+				copy(inbuf, inbuf[event.N:])
+				inbuf = inbuf[:len(inbuf)-event.N]
+			}
+			if ok {
+				return event
+			}
+		case <-interrupt_comm:
+			event.Type = EventInterrupt
+			return event
+
+		case <-sigwinch:
+			event.Type = EventResize
+			event.Width, event.Height = get_term_size(out.Fd())
+			return event
+		}
+	}
+	panic("unreachable")
+}
+
+// Returns the size of the internal back buffer (which is mostly the same as
+// terminal's window size in characters). But it doesn't always match the size
+// of the terminal window, after the terminal size has changed, the internal
+// back buffer will get in sync only after Clear or Flush function calls.
+func Size() (width int, height int) {
+	return termw, termh
+}
+
+// Clears the internal back buffer.
+func Clear(fg, bg Attribute) error {
+	foreground, background = fg, bg
+	err := update_size_maybe()
+	back_buffer.clear()
+	return err
+}
+
+// Sets termbox input mode. Termbox has two input modes:
+//
+// 1. Esc input mode. When ESC sequence is in the buffer and it doesn't match
+// any known sequence. ESC means KeyEsc. This is the default input mode.
+//
+// 2. Alt input mode. When ESC sequence is in the buffer and it doesn't match
+// any known sequence. ESC enables ModAlt modifier for the next keyboard event.
+//
+// Both input modes can be OR'ed with Mouse mode. Setting Mouse mode bit up will
+// enable mouse button press/release and drag events.
+//
+// If 'mode' is InputCurrent, returns the current input mode. See also Input*
+// constants.
+func SetInputMode(mode InputMode) InputMode {
+	if mode == InputCurrent {
+		return input_mode
+	}
+	if mode&(InputEsc|InputAlt) == 0 {
+		mode |= InputEsc
+	}
+	if mode&(InputEsc|InputAlt) == InputEsc|InputAlt {
+		mode &^= InputAlt
+	}
+	if mode&InputMouse != 0 {
+		out.WriteString(funcs[t_enter_mouse])
+	} else {
+		out.WriteString(funcs[t_exit_mouse])
+	}
+
+	input_mode = mode
+	return input_mode
+}
+
+// Sets the termbox output mode. Termbox has four output options:
+//
+// 1. OutputNormal => [1..8]
+//    This mode provides 8 different colors:
+//        black, red, green, yellow, blue, magenta, cyan, white
+//    Shortcut: ColorBlack, ColorRed, ...
+//    Attributes: AttrBold, AttrUnderline, AttrReverse
+//
+//    Example usage:
+//        SetCell(x, y, '@', ColorBlack | AttrBold, ColorRed);
+//
+// 2. Output256 => [1..256]
+//    In this mode you can leverage the 256 terminal mode:
+//    0x01 - 0x08: the 8 colors as in OutputNormal
+//    0x09 - 0x10: Color* | AttrBold
+//    0x11 - 0xe8: 216 different colors
+//    0xe9 - 0x1ff: 24 different shades of grey
+//
+//    Example usage:
+//        SetCell(x, y, '@', 184, 240);
+//        SetCell(x, y, '@', 0xb8, 0xf0);
+//
+// 3. Output216 => [1..216]
+//    This mode supports the 3rd range of the 256 mode only.
+//    But you dont need to provide an offset.
+//
+// 4. OutputGrayscale => [1..26]
+//    This mode supports the 4th range of the 256 mode
+//    and black and white colors from 3th range of the 256 mode
+//    But you dont need to provide an offset.
+//
+// In all modes, 0x00 represents the default color.
+//
+// `go run _demos/output.go` to see its impact on your terminal.
+//
+// If 'mode' is OutputCurrent, it returns the current output mode.
+//
+// Note that this may return a different OutputMode than the one requested,
+// as the requested mode may not be available on the target platform.
+func SetOutputMode(mode OutputMode) OutputMode {
+	if mode == OutputCurrent {
+		return output_mode
+	}
+
+	output_mode = mode
+	return output_mode
+}
+
+// Sync comes handy when something causes desync between termbox's understanding
+// of a terminal buffer and the reality. Such as a third party process. Sync
+// forces a complete resync between the termbox and a terminal, it may not be
+// visually pretty though.
+func Sync() error {
+	front_buffer.clear()
+	err := send_clear()
+	if err != nil {
+		return err
+	}
+
+	return Flush()
+}

vendor/github.com/nsf/termbox-go/api_common.go

@@ -0,0 +1,187 @@
+// termbox is a library for creating cross-platform text-based interfaces
+package termbox
+
+// public API, common OS agnostic part
+
+type (
+	InputMode  int
+	OutputMode int
+	EventType  uint8
+	Modifier   uint8
+	Key        uint16
+	Attribute  uint16
+)
+
+// This type represents a termbox event. The 'Mod', 'Key' and 'Ch' fields are
+// valid if 'Type' is EventKey. The 'Width' and 'Height' fields are valid if
+// 'Type' is EventResize. The 'Err' field is valid if 'Type' is EventError.
+type Event struct {
+	Type   EventType // one of Event* constants
+	Mod    Modifier  // one of Mod* constants or 0
+	Key    Key       // one of Key* constants, invalid if 'Ch' is not 0
+	Ch     rune      // a unicode character
+	Width  int       // width of the screen
+	Height int       // height of the screen
+	Err    error     // error in case if input failed
+	MouseX int       // x coord of mouse
+	MouseY int       // y coord of mouse
+	N      int       // number of bytes written when getting a raw event
+}
+
+// A cell, single conceptual entity on the screen. The screen is basically a 2d
+// array of cells. 'Ch' is a unicode character, 'Fg' and 'Bg' are foreground
+// and background attributes respectively.
+type Cell struct {
+	Ch rune
+	Fg Attribute
+	Bg Attribute
+}
+
+// To know if termbox has been initialized or not
+var (
+	IsInit bool = false
+)
+
+// Key constants, see Event.Key field.
+const (
+	KeyF1 Key = 0xFFFF - iota
+	KeyF2
+	KeyF3
+	KeyF4
+	KeyF5
+	KeyF6
+	KeyF7
+	KeyF8
+	KeyF9
+	KeyF10
+	KeyF11
+	KeyF12
+	KeyInsert
+	KeyDelete
+	KeyHome
+	KeyEnd
+	KeyPgup
+	KeyPgdn
+	KeyArrowUp
+	KeyArrowDown
+	KeyArrowLeft
+	KeyArrowRight
+	key_min // see terminfo
+	MouseLeft
+	MouseMiddle
+	MouseRight
+	MouseRelease
+	MouseWheelUp
+	MouseWheelDown
+)
+
+const (
+	KeyCtrlTilde      Key = 0x00
+	KeyCtrl2          Key = 0x00
+	KeyCtrlSpace      Key = 0x00
+	KeyCtrlA          Key = 0x01
+	KeyCtrlB          Key = 0x02
+	KeyCtrlC          Key = 0x03
+	KeyCtrlD          Key = 0x04
+	KeyCtrlE          Key = 0x05
+	KeyCtrlF          Key = 0x06
+	KeyCtrlG          Key = 0x07
+	KeyBackspace      Key = 0x08
+	KeyCtrlH          Key = 0x08
+	KeyTab            Key = 0x09
+	KeyCtrlI          Key = 0x09
+	KeyCtrlJ          Key = 0x0A
+	KeyCtrlK          Key = 0x0B
+	KeyCtrlL          Key = 0x0C
+	KeyEnter          Key = 0x0D
+	KeyCtrlM          Key = 0x0D
+	KeyCtrlN          Key = 0x0E
+	KeyCtrlO          Key = 0x0F
+	KeyCtrlP          Key = 0x10
+	KeyCtrlQ          Key = 0x11
+	KeyCtrlR          Key = 0x12
+	KeyCtrlS          Key = 0x13
+	KeyCtrlT          Key = 0x14
+	KeyCtrlU          Key = 0x15
+	KeyCtrlV          Key = 0x16
+	KeyCtrlW          Key = 0x17
+	KeyCtrlX          Key = 0x18
+	KeyCtrlY          Key = 0x19
+	KeyCtrlZ          Key = 0x1A
+	KeyEsc            Key = 0x1B
+	KeyCtrlLsqBracket Key = 0x1B
+	KeyCtrl3          Key = 0x1B
+	KeyCtrl4          Key = 0x1C
+	KeyCtrlBackslash  Key = 0x1C
+	KeyCtrl5          Key = 0x1D
+	KeyCtrlRsqBracket Key = 0x1D
+	KeyCtrl6          Key = 0x1E
+	KeyCtrl7          Key = 0x1F
+	KeyCtrlSlash      Key = 0x1F
+	KeyCtrlUnderscore Key = 0x1F
+	KeySpace          Key = 0x20
+	KeyBackspace2     Key = 0x7F
+	KeyCtrl8          Key = 0x7F
+)
+
+// Alt modifier constant, see Event.Mod field and SetInputMode function.
+const (
+	ModAlt Modifier = 1 << iota
+	ModMotion
+)
+
+// Cell colors, you can combine a color with multiple attributes using bitwise
+// OR ('|').
+const (
+	ColorDefault Attribute = iota
+	ColorBlack
+	ColorRed
+	ColorGreen
+	ColorYellow
+	ColorBlue
+	ColorMagenta
+	ColorCyan
+	ColorWhite
+)
+
+// Cell attributes, it is possible to use multiple attributes by combining them
+// using bitwise OR ('|'). Although, colors cannot be combined. But you can
+// combine attributes and a single color.
+//
+// It's worth mentioning that some platforms don't support certain attibutes.
+// For example windows console doesn't support AttrUnderline. And on some
+// terminals applying AttrBold to background may result in blinking text. Use
+// them with caution and test your code on various terminals.
+const (
+	AttrBold Attribute = 1 << (iota + 9)
+	AttrUnderline
+	AttrReverse
+)
+
+// Input mode. See SetInputMode function.
+const (
+	InputEsc InputMode = 1 << iota
+	InputAlt
+	InputMouse
+	InputCurrent InputMode = 0
+)
+
+// Output mode. See SetOutputMode function.
+const (
+	OutputCurrent OutputMode = iota
+	OutputNormal
+	Output256
+	Output216
+	OutputGrayscale
+)
+
+// Event type. See Event.Type field.
+const (
+	EventKey EventType = iota
+	EventResize
+	EventMouse
+	EventError
+	EventInterrupt
+	EventRaw
+	EventNone
+)

vendor/github.com/nsf/termbox-go/api_windows.go

@@ -0,0 +1,239 @@
+package termbox
+
+import (
+	"syscall"
+)
+
+// public API
+
+// Initializes termbox library. This function should be called before any other functions.
+// After successful initialization, the library must be finalized using 'Close' function.
+//
+// Example usage:
+//      err := termbox.Init()
+//      if err != nil {
+//              panic(err)
+//      }
+//      defer termbox.Close()
+func Init() error {
+	var err error
+
+	interrupt, err = create_event()
+	if err != nil {
+		return err
+	}
+
+	in, err = syscall.Open("CONIN$", syscall.O_RDWR, 0)
+	if err != nil {
+		return err
+	}
+	out, err = syscall.Open("CONOUT$", syscall.O_RDWR, 0)
+	if err != nil {
+		return err
+	}
+
+	err = get_console_mode(in, &orig_mode)
+	if err != nil {
+		return err
+	}
+
+	err = set_console_mode(in, enable_window_input)
+	if err != nil {
+		return err
+	}
+
+	orig_size = get_term_size(out)
+	win_size := get_win_size(out)
+
+	err = set_console_screen_buffer_size(out, win_size)
+	if err != nil {
+		return err
+	}
+
+	err = get_console_cursor_info(out, &orig_cursor_info)
+	if err != nil {
+		return err
+	}
+
+	show_cursor(false)
+	term_size = get_term_size(out)
+	back_buffer.init(int(term_size.x), int(term_size.y))
+	front_buffer.init(int(term_size.x), int(term_size.y))
+	back_buffer.clear()
+	front_buffer.clear()
+	clear()
+
+	diffbuf = make([]diff_msg, 0, 32)
+
+	go input_event_producer()
+	IsInit = true
+	return nil
+}
+
+// Finalizes termbox library, should be called after successful initialization
+// when termbox's functionality isn't required anymore.
+func Close() {
+	// we ignore errors here, because we can't really do anything about them
+	Clear(0, 0)
+	Flush()
+
+	// stop event producer
+	cancel_comm <- true
+	set_event(interrupt)
+	select {
+	case <-input_comm:
+	default:
+	}
+	<-cancel_done_comm
+
+	set_console_cursor_info(out, &orig_cursor_info)
+	set_console_cursor_position(out, coord{})
+	set_console_screen_buffer_size(out, orig_size)
+	set_console_mode(in, orig_mode)
+	syscall.Close(in)
+	syscall.Close(out)
+	syscall.Close(interrupt)
+	IsInit = false
+}
+
+// Interrupt an in-progress call to PollEvent by causing it to return
+// EventInterrupt.  Note that this function will block until the PollEvent
+// function has successfully been interrupted.
+func Interrupt() {
+	interrupt_comm <- struct{}{}
+}
+
+// Synchronizes the internal back buffer with the terminal.
+func Flush() error {
+	update_size_maybe()
+	prepare_diff_messages()
+	for _, diff := range diffbuf {
+		r := small_rect{
+			left:   0,
+			top:    diff.pos,
+			right:  term_size.x - 1,
+			bottom: diff.pos + diff.lines - 1,
+		}
+		write_console_output(out, diff.chars, r)
+	}
+	if !is_cursor_hidden(cursor_x, cursor_y) {
+		move_cursor(cursor_x, cursor_y)
+	}
+	return nil
+}
+
+// Sets the position of the cursor. See also HideCursor().
+func SetCursor(x, y int) {
+	if is_cursor_hidden(cursor_x, cursor_y) && !is_cursor_hidden(x, y) {
+		show_cursor(true)
+	}
+
+	if !is_cursor_hidden(cursor_x, cursor_y) && is_cursor_hidden(x, y) {
+		show_cursor(false)
+	}
+
+	cursor_x, cursor_y = x, y
+	if !is_cursor_hidden(cursor_x, cursor_y) {
+		move_cursor(cursor_x, cursor_y)
+	}
+}
+
+// The shortcut for SetCursor(-1, -1).
+func HideCursor() {
+	SetCursor(cursor_hidden, cursor_hidden)
+}
+
+// Changes cell's parameters in the internal back buffer at the specified
+// position.
+func SetCell(x, y int, ch rune, fg, bg Attribute) {
+	if x < 0 || x >= back_buffer.width {
+		return
+	}
+	if y < 0 || y >= back_buffer.height {
+		return
+	}
+
+	back_buffer.cells[y*back_buffer.width+x] = Cell{ch, fg, bg}
+}
+
+// Returns a slice into the termbox's back buffer. You can get its dimensions
+// using 'Size' function. The slice remains valid as long as no 'Clear' or
+// 'Flush' function calls were made after call to this function.
+func CellBuffer() []Cell {
+	return back_buffer.cells
+}
+
+// Wait for an event and return it. This is a blocking function call.
+func PollEvent() Event {
+	select {
+	case ev := <-input_comm:
+		return ev
+	case <-interrupt_comm:
+		return Event{Type: EventInterrupt}
+	}
+}
+
+// Returns the size of the internal back buffer (which is mostly the same as
+// console's window size in characters). But it doesn't always match the size
+// of the console window, after the console size has changed, the internal back
+// buffer will get in sync only after Clear or Flush function calls.
+func Size() (int, int) {
+	return int(term_size.x), int(term_size.y)
+}
+
+// Clears the internal back buffer.
+func Clear(fg, bg Attribute) error {
+	foreground, background = fg, bg
+	update_size_maybe()
+	back_buffer.clear()
+	return nil
+}
+
+// Sets termbox input mode. Termbox has two input modes:
+//
+// 1. Esc input mode. When ESC sequence is in the buffer and it doesn't match
+// any known sequence. ESC means KeyEsc. This is the default input mode.
+//
+// 2. Alt input mode. When ESC sequence is in the buffer and it doesn't match
+// any known sequence. ESC enables ModAlt modifier for the next keyboard event.
+//
+// Both input modes can be OR'ed with Mouse mode. Setting Mouse mode bit up will
+// enable mouse button press/release and drag events.
+//
+// If 'mode' is InputCurrent, returns the current input mode. See also Input*
+// constants.
+func SetInputMode(mode InputMode) InputMode {
+	if mode == InputCurrent {
+		return input_mode
+	}
+	if mode&InputMouse != 0 {
+		err := set_console_mode(in, enable_window_input|enable_mouse_input|enable_extended_flags)
+		if err != nil {
+			panic(err)
+		}
+	} else {
+		err := set_console_mode(in, enable_window_input)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	input_mode = mode
+	return input_mode
+}
+
+// Sets the termbox output mode.
+//
+// Windows console does not support extra colour modes,
+// so this will always set and return OutputNormal.
+func SetOutputMode(mode OutputMode) OutputMode {
+	return OutputNormal
+}
+
+// Sync comes handy when something causes desync between termbox's understanding
+// of a terminal buffer and the reality. Such as a third party process. Sync
+// forces a complete resync between the termbox and a terminal, it may not be
+// visually pretty though. At the moment on Windows it does nothing.
+func Sync() error {
+	return nil
+}

vendor/github.com/nsf/termbox-go/collect_terminfo.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python
+
+import sys, os, subprocess
+
+def escaped(s):
+	return repr(s)[1:-1]
+
+def tput(term, name):
+	try:
+		return subprocess.check_output(['tput', '-T%s' % term, name]).decode()
+	except subprocess.CalledProcessError as e:
+		return e.output.decode()
+
+
+def w(s):
+	if s == None:
+		return
+	sys.stdout.write(s)
+
+terminals = {
+	'xterm' : 'xterm',
+	'rxvt-256color' : 'rxvt_256color',
+	'rxvt-unicode' : 'rxvt_unicode',
+	'linux' : 'linux',
+	'Eterm' : 'eterm',
+	'screen' : 'screen'
+}
+
+keys = [
+	"F1",		"kf1",
+	"F2",		"kf2",
+	"F3",		"kf3",
+	"F4",		"kf4",
+	"F5",		"kf5",
+	"F6",		"kf6",
+	"F7",		"kf7",
+	"F8",		"kf8",
+	"F9",		"kf9",
+	"F10",		"kf10",
+	"F11",		"kf11",
+	"F12",		"kf12",
+	"INSERT",	"kich1",
+	"DELETE",	"kdch1",
+	"HOME",		"khome",
+	"END",		"kend",
+	"PGUP",		"kpp",
+	"PGDN",		"knp",
+	"KEY_UP",	"kcuu1",
+	"KEY_DOWN",	"kcud1",
+	"KEY_LEFT",	"kcub1",
+	"KEY_RIGHT",	"kcuf1"
+]
+
+funcs = [
+	"T_ENTER_CA",		"smcup",
+	"T_EXIT_CA",		"rmcup",
+	"T_SHOW_CURSOR",	"cnorm",
+	"T_HIDE_CURSOR",	"civis",
+	"T_CLEAR_SCREEN",	"clear",
+	"T_SGR0",		"sgr0",
+	"T_UNDERLINE",		"smul",
+	"T_BOLD",		"bold",
+	"T_BLINK",		"blink",
+	"T_REVERSE",            "rev",
+	"T_ENTER_KEYPAD",	"smkx",
+	"T_EXIT_KEYPAD",	"rmkx"
+]
+
+def iter_pairs(iterable):
+	iterable = iter(iterable)
+	while True:
+		yield (next(iterable), next(iterable))
+
+def do_term(term, nick):
+	w("// %s\n" % term)
+	w("var %s_keys = []string{\n\t" % nick)
+	for k, v in iter_pairs(keys):
+		w('"')
+		w(escaped(tput(term, v)))
+		w('",')
+	w("\n}\n")
+	w("var %s_funcs = []string{\n\t" % nick)
+	for k,v in iter_pairs(funcs):
+		w('"')
+		if v == "sgr":
+			w("\\033[3%d;4%dm")
+		elif v == "cup":
+			w("\\033[%d;%dH")
+		else:
+			w(escaped(tput(term, v)))
+		w('", ')
+	w("\n}\n\n")
+
+def do_terms(d):
+	w("var terms = []struct {\n")
+	w("\tname  string\n")
+	w("\tkeys  []string\n")
+	w("\tfuncs []string\n")
+	w("}{\n")
+	for k, v in d.items():
+		w('\t{"%s", %s_keys, %s_funcs},\n' % (k, v, v))
+	w("}\n\n")
+
+w("// +build !windows\n\npackage termbox\n\n")
+
+for k,v in terminals.items():
+	do_term(k, v)
+
+do_terms(terminals)
+

vendor/github.com/nsf/termbox-go/syscalls.go

@@ -0,0 +1,39 @@
+// +build ignore
+
+package termbox
+
+/*
+#include <termios.h>
+#include <sys/ioctl.h>
+*/
+import "C"
+
+type syscall_Termios C.struct_termios
+
+const (
+	syscall_IGNBRK = C.IGNBRK
+	syscall_BRKINT = C.BRKINT
+	syscall_PARMRK = C.PARMRK
+	syscall_ISTRIP = C.ISTRIP
+	syscall_INLCR  = C.INLCR
+	syscall_IGNCR  = C.IGNCR
+	syscall_ICRNL  = C.ICRNL
+	syscall_IXON   = C.IXON
+	syscall_OPOST  = C.OPOST
+	syscall_ECHO   = C.ECHO
+	syscall_ECHONL = C.ECHONL
+	syscall_ICANON = C.ICANON
+	syscall_ISIG   = C.ISIG
+	syscall_IEXTEN = C.IEXTEN
+	syscall_CSIZE  = C.CSIZE
+	syscall_PARENB = C.PARENB
+	syscall_CS8    = C.CS8
+	syscall_VMIN   = C.VMIN
+	syscall_VTIME  = C.VTIME
+
+	// on darwin change these to (on *bsd too?):
+	// C.TIOCGETA
+	// C.TIOCSETA
+	syscall_TCGETS = C.TCGETS
+	syscall_TCSETS = C.TCSETS
+)

vendor/github.com/nsf/termbox-go/syscalls_darwin.go

@@ -0,0 +1,41 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs syscalls.go
+
+// +build !amd64
+
+package termbox
+
+type syscall_Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]uint8
+	Ispeed uint32
+	Ospeed uint32
+}
+
+const (
+	syscall_IGNBRK = 0x1
+	syscall_BRKINT = 0x2
+	syscall_PARMRK = 0x8
+	syscall_ISTRIP = 0x20
+	syscall_INLCR  = 0x40
+	syscall_IGNCR  = 0x80
+	syscall_ICRNL  = 0x100
+	syscall_IXON   = 0x200
+	syscall_OPOST  = 0x1
+	syscall_ECHO   = 0x8
+	syscall_ECHONL = 0x10
+	syscall_ICANON = 0x100
+	syscall_ISIG   = 0x80
+	syscall_IEXTEN = 0x400
+	syscall_CSIZE  = 0x300
+	syscall_PARENB = 0x1000
+	syscall_CS8    = 0x300
+	syscall_VMIN   = 0x10
+	syscall_VTIME  = 0x11
+
+	syscall_TCGETS = 0x402c7413
+	syscall_TCSETS = 0x802c7414
+)

vendor/github.com/nsf/termbox-go/syscalls_darwin_amd64.go

@@ -0,0 +1,40 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs syscalls.go
+
+package termbox
+
+type syscall_Termios struct {
+	Iflag     uint64
+	Oflag     uint64
+	Cflag     uint64
+	Lflag     uint64
+	Cc        [20]uint8
+	Pad_cgo_0 [4]byte
+	Ispeed    uint64
+	Ospeed    uint64
+}
+
+const (
+	syscall_IGNBRK = 0x1
+	syscall_BRKINT = 0x2
+	syscall_PARMRK = 0x8
+	syscall_ISTRIP = 0x20
+	syscall_INLCR  = 0x40
+	syscall_IGNCR  = 0x80
+	syscall_ICRNL  = 0x100
+	syscall_IXON   = 0x200
+	syscall_OPOST  = 0x1
+	syscall_ECHO   = 0x8
+	syscall_ECHONL = 0x10
+	syscall_ICANON = 0x100
+	syscall_ISIG   = 0x80
+	syscall_IEXTEN = 0x400
+	syscall_CSIZE  = 0x300
+	syscall_PARENB = 0x1000
+	syscall_CS8    = 0x300
+	syscall_VMIN   = 0x10
+	syscall_VTIME  = 0x11
+
+	syscall_TCGETS = 0x40487413
+	syscall_TCSETS = 0x80487414
+)

vendor/github.com/nsf/termbox-go/syscalls_freebsd.go

@@ -0,0 +1,39 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs syscalls.go
+
+package termbox
+
+type syscall_Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]uint8
+	Ispeed uint32
+	Ospeed uint32
+}
+
+const (
+	syscall_IGNBRK = 0x1
+	syscall_BRKINT = 0x2
+	syscall_PARMRK = 0x8
+	syscall_ISTRIP = 0x20
+	syscall_INLCR  = 0x40
+	syscall_IGNCR  = 0x80
+	syscall_ICRNL  = 0x100
+	syscall_IXON   = 0x200
+	syscall_OPOST  = 0x1
+	syscall_ECHO   = 0x8
+	syscall_ECHONL = 0x10
+	syscall_ICANON = 0x100
+	syscall_ISIG   = 0x80
+	syscall_IEXTEN = 0x400
+	syscall_CSIZE  = 0x300
+	syscall_PARENB = 0x1000
+	syscall_CS8    = 0x300
+	syscall_VMIN   = 0x10
+	syscall_VTIME  = 0x11
+
+	syscall_TCGETS = 0x402c7413
+	syscall_TCSETS = 0x802c7414
+)

vendor/github.com/nsf/termbox-go/syscalls_linux.go

@@ -0,0 +1,33 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs syscalls.go
+
+package termbox
+
+import "syscall"
+
+type syscall_Termios syscall.Termios
+
+const (
+	syscall_IGNBRK = syscall.IGNBRK
+	syscall_BRKINT = syscall.BRKINT
+	syscall_PARMRK = syscall.PARMRK
+	syscall_ISTRIP = syscall.ISTRIP
+	syscall_INLCR  = syscall.INLCR
+	syscall_IGNCR  = syscall.IGNCR
+	syscall_ICRNL  = syscall.ICRNL
+	syscall_IXON   = syscall.IXON
+	syscall_OPOST  = syscall.OPOST
+	syscall_ECHO   = syscall.ECHO
+	syscall_ECHONL = syscall.ECHONL
+	syscall_ICANON = syscall.ICANON
+	syscall_ISIG   = syscall.ISIG
+	syscall_IEXTEN = syscall.IEXTEN
+	syscall_CSIZE  = syscall.CSIZE
+	syscall_PARENB = syscall.PARENB
+	syscall_CS8    = syscall.CS8
+	syscall_VMIN   = syscall.VMIN
+	syscall_VTIME  = syscall.VTIME
+
+	syscall_TCGETS = syscall.TCGETS
+	syscall_TCSETS = syscall.TCSETS
+)

vendor/github.com/nsf/termbox-go/syscalls_netbsd.go

@@ -0,0 +1,39 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs syscalls.go
+
+package termbox
+
+type syscall_Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]uint8
+	Ispeed int32
+	Ospeed int32
+}
+
+const (
+	syscall_IGNBRK = 0x1
+	syscall_BRKINT = 0x2
+	syscall_PARMRK = 0x8
+	syscall_ISTRIP = 0x20
+	syscall_INLCR  = 0x40
+	syscall_IGNCR  = 0x80
+	syscall_ICRNL  = 0x100
+	syscall_IXON   = 0x200
+	syscall_OPOST  = 0x1
+	syscall_ECHO   = 0x8
+	syscall_ECHONL = 0x10
+	syscall_ICANON = 0x100
+	syscall_ISIG   = 0x80
+	syscall_IEXTEN = 0x400
+	syscall_CSIZE  = 0x300
+	syscall_PARENB = 0x1000
+	syscall_CS8    = 0x300
+	syscall_VMIN   = 0x10
+	syscall_VTIME  = 0x11
+
+	syscall_TCGETS = 0x402c7413
+	syscall_TCSETS = 0x802c7414
+)

vendor/github.com/nsf/termbox-go/syscalls_openbsd.go

@@ -0,0 +1,39 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs syscalls.go
+
+package termbox
+
+type syscall_Termios struct {
+	Iflag  uint32
+	Oflag  uint32
+	Cflag  uint32
+	Lflag  uint32
+	Cc     [20]uint8
+	Ispeed int32
+	Ospeed int32
+}
+
+const (
+	syscall_IGNBRK = 0x1
+	syscall_BRKINT = 0x2
+	syscall_PARMRK = 0x8
+	syscall_ISTRIP = 0x20
+	syscall_INLCR  = 0x40
+	syscall_IGNCR  = 0x80
+	syscall_ICRNL  = 0x100
+	syscall_IXON   = 0x200
+	syscall_OPOST  = 0x1
+	syscall_ECHO   = 0x8
+	syscall_ECHONL = 0x10
+	syscall_ICANON = 0x100
+	syscall_ISIG   = 0x80
+	syscall_IEXTEN = 0x400
+	syscall_CSIZE  = 0x300
+	syscall_PARENB = 0x1000
+	syscall_CS8    = 0x300
+	syscall_VMIN   = 0x10
+	syscall_VTIME  = 0x11
+
+	syscall_TCGETS = 0x402c7413
+	syscall_TCSETS = 0x802c7414
+)

vendor/github.com/nsf/termbox-go/syscalls_windows.go

@@ -0,0 +1,61 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs -- -DUNICODE syscalls.go
+
+package termbox
+
+const (
+	foreground_blue          = 0x1
+	foreground_green         = 0x2
+	foreground_red           = 0x4
+	foreground_intensity     = 0x8
+	background_blue          = 0x10
+	background_green         = 0x20
+	background_red           = 0x40
+	background_intensity     = 0x80
+	std_input_handle         = -0xa
+	std_output_handle        = -0xb
+	key_event                = 0x1
+	mouse_event              = 0x2
+	window_buffer_size_event = 0x4
+	enable_window_input      = 0x8
+	enable_mouse_input       = 0x10
+	enable_extended_flags    = 0x80
+
+	vk_f1          = 0x70
+	vk_f2          = 0x71
+	vk_f3          = 0x72
+	vk_f4          = 0x73
+	vk_f5          = 0x74
+	vk_f6          = 0x75
+	vk_f7          = 0x76
+	vk_f8          = 0x77
+	vk_f9          = 0x78
+	vk_f10         = 0x79
+	vk_f11         = 0x7a
+	vk_f12         = 0x7b
+	vk_insert      = 0x2d
+	vk_delete      = 0x2e
+	vk_home        = 0x24
+	vk_end         = 0x23
+	vk_pgup        = 0x21
+	vk_pgdn        = 0x22
+	vk_arrow_up    = 0x26
+	vk_arrow_down  = 0x28
+	vk_arrow_left  = 0x25
+	vk_arrow_right = 0x27
+	vk_backspace   = 0x8
+	vk_tab         = 0x9
+	vk_enter       = 0xd
+	vk_esc         = 0x1b
+	vk_space       = 0x20
+
+	left_alt_pressed   = 0x2
+	left_ctrl_pressed  = 0x8
+	right_alt_pressed  = 0x1
+	right_ctrl_pressed = 0x4
+	shift_pressed      = 0x10
+
+	generic_read            = 0x80000000
+	generic_write           = 0x40000000
+	console_textmode_buffer = 0x1
+)

vendor/github.com/nsf/termbox-go/termbox.go

@@ -0,0 +1,514 @@
+// +build !windows
+
+package termbox
+
+import "unicode/utf8"
+import "bytes"
+import "syscall"
+import "unsafe"
+import "strings"
+import "strconv"
+import "os"
+import "io"
+
+// private API
+
+const (
+	t_enter_ca = iota
+	t_exit_ca
+	t_show_cursor
+	t_hide_cursor
+	t_clear_screen
+	t_sgr0
+	t_underline
+	t_bold
+	t_blink
+	t_reverse
+	t_enter_keypad
+	t_exit_keypad
+	t_enter_mouse
+	t_exit_mouse
+	t_max_funcs
+)
+
+const (
+	coord_invalid = -2
+	attr_invalid  = Attribute(0xFFFF)
+)
+
+type input_event struct {
+	data []byte
+	err  error
+}
+
+var (
+	// term specific sequences
+	keys  []string
+	funcs []string
+
+	// termbox inner state
+	orig_tios      syscall_Termios
+	back_buffer    cellbuf
+	front_buffer   cellbuf
+	termw          int
+	termh          int
+	input_mode     = InputEsc
+	output_mode    = OutputNormal
+	out            *os.File
+	in             int
+	lastfg         = attr_invalid
+	lastbg         = attr_invalid
+	lastx          = coord_invalid
+	lasty          = coord_invalid
+	cursor_x       = cursor_hidden
+	cursor_y       = cursor_hidden
+	foreground     = ColorDefault
+	background     = ColorDefault
+	inbuf          = make([]byte, 0, 64)
+	outbuf         bytes.Buffer
+	sigwinch       = make(chan os.Signal, 1)
+	sigio          = make(chan os.Signal, 1)
+	quit           = make(chan int)
+	input_comm     = make(chan input_event)
+	interrupt_comm = make(chan struct{})
+	intbuf         = make([]byte, 0, 16)
+
+	// grayscale indexes
+	grayscale = []Attribute{
+		0, 17, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244,
+		245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 232,
+	}
+)
+
+func write_cursor(x, y int) {
+	outbuf.WriteString("\033[")
+	outbuf.Write(strconv.AppendUint(intbuf, uint64(y+1), 10))
+	outbuf.WriteString(";")
+	outbuf.Write(strconv.AppendUint(intbuf, uint64(x+1), 10))
+	outbuf.WriteString("H")
+}
+
+func write_sgr_fg(a Attribute) {
+	switch output_mode {
+	case Output256, Output216, OutputGrayscale:
+		outbuf.WriteString("\033[38;5;")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+		outbuf.WriteString("m")
+	default:
+		outbuf.WriteString("\033[3")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+		outbuf.WriteString("m")
+	}
+}
+
+func write_sgr_bg(a Attribute) {
+	switch output_mode {
+	case Output256, Output216, OutputGrayscale:
+		outbuf.WriteString("\033[48;5;")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+		outbuf.WriteString("m")
+	default:
+		outbuf.WriteString("\033[4")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(a-1), 10))
+		outbuf.WriteString("m")
+	}
+}
+
+func write_sgr(fg, bg Attribute) {
+	switch output_mode {
+	case Output256, Output216, OutputGrayscale:
+		outbuf.WriteString("\033[38;5;")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(fg-1), 10))
+		outbuf.WriteString("m")
+		outbuf.WriteString("\033[48;5;")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(bg-1), 10))
+		outbuf.WriteString("m")
+	default:
+		outbuf.WriteString("\033[3")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(fg-1), 10))
+		outbuf.WriteString(";4")
+		outbuf.Write(strconv.AppendUint(intbuf, uint64(bg-1), 10))
+		outbuf.WriteString("m")
+	}
+}
+
+type winsize struct {
+	rows    uint16
+	cols    uint16
+	xpixels uint16
+	ypixels uint16
+}
+
+func get_term_size(fd uintptr) (int, int) {
+	var sz winsize
+	_, _, _ = syscall.Syscall(syscall.SYS_IOCTL,
+		fd, uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&sz)))
+	return int(sz.cols), int(sz.rows)
+}
+
+func send_attr(fg, bg Attribute) {
+	if fg == lastfg && bg == lastbg {
+		return
+	}
+
+	outbuf.WriteString(funcs[t_sgr0])
+
+	var fgcol, bgcol Attribute
+
+	switch output_mode {
+	case Output256:
+		fgcol = fg & 0x1FF
+		bgcol = bg & 0x1FF
+	case Output216:
+		fgcol = fg & 0xFF
+		bgcol = bg & 0xFF
+		if fgcol > 216 {
+			fgcol = ColorDefault
+		}
+		if bgcol > 216 {
+			bgcol = ColorDefault
+		}
+		if fgcol != ColorDefault {
+			fgcol += 0x10
+		}
+		if bgcol != ColorDefault {
+			bgcol += 0x10
+		}
+	case OutputGrayscale:
+		fgcol = fg & 0x1F
+		bgcol = bg & 0x1F
+		if fgcol > 26 {
+			fgcol = ColorDefault
+		}
+		if bgcol > 26 {
+			bgcol = ColorDefault
+		}
+		if fgcol != ColorDefault {
+			fgcol = grayscale[fgcol]
+		}
+		if bgcol != ColorDefault {
+			bgcol = grayscale[bgcol]
+		}
+	default:
+		fgcol = fg & 0x0F
+		bgcol = bg & 0x0F
+	}
+
+	if fgcol != ColorDefault {
+		if bgcol != ColorDefault {
+			write_sgr(fgcol, bgcol)
+		} else {
+			write_sgr_fg(fgcol)
+		}
+	} else if bgcol != ColorDefault {
+		write_sgr_bg(bgcol)
+	}
+
+	if fg&AttrBold != 0 {
+		outbuf.WriteString(funcs[t_bold])
+	}
+	if bg&AttrBold != 0 {
+		outbuf.WriteString(funcs[t_blink])
+	}
+	if fg&AttrUnderline != 0 {
+		outbuf.WriteString(funcs[t_underline])
+	}
+	if fg&AttrReverse|bg&AttrReverse != 0 {
+		outbuf.WriteString(funcs[t_reverse])
+	}
+
+	lastfg, lastbg = fg, bg
+}
+
+func send_char(x, y int, ch rune) {
+	var buf [8]byte
+	n := utf8.EncodeRune(buf[:], ch)
+	if x-1 != lastx || y != lasty {
+		write_cursor(x, y)
+	}
+	lastx, lasty = x, y
+	outbuf.Write(buf[:n])
+}
+
+func flush() error {
+	_, err := io.Copy(out, &outbuf)
+	outbuf.Reset()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func send_clear() error {
+	send_attr(foreground, background)
+	outbuf.WriteString(funcs[t_clear_screen])
+	if !is_cursor_hidden(cursor_x, cursor_y) {
+		write_cursor(cursor_x, cursor_y)
+	}
+
+	// we need to invalidate cursor position too and these two vars are
+	// used only for simple cursor positioning optimization, cursor
+	// actually may be in the correct place, but we simply discard
+	// optimization once and it gives us simple solution for the case when
+	// cursor moved
+	lastx = coord_invalid
+	lasty = coord_invalid
+
+	return flush()
+}
+
+func update_size_maybe() error {
+	w, h := get_term_size(out.Fd())
+	if w != termw || h != termh {
+		termw, termh = w, h
+		back_buffer.resize(termw, termh)
+		front_buffer.resize(termw, termh)
+		front_buffer.clear()
+		return send_clear()
+	}
+	return nil
+}
+
+func tcsetattr(fd uintptr, termios *syscall_Termios) error {
+	r, _, e := syscall.Syscall(syscall.SYS_IOCTL,
+		fd, uintptr(syscall_TCSETS), uintptr(unsafe.Pointer(termios)))
+	if r != 0 {
+		return os.NewSyscallError("SYS_IOCTL", e)
+	}
+	return nil
+}
+
+func tcgetattr(fd uintptr, termios *syscall_Termios) error {
+	r, _, e := syscall.Syscall(syscall.SYS_IOCTL,
+		fd, uintptr(syscall_TCGETS), uintptr(unsafe.Pointer(termios)))
+	if r != 0 {
+		return os.NewSyscallError("SYS_IOCTL", e)
+	}
+	return nil
+}
+
+func parse_mouse_event(event *Event, buf string) (int, bool) {
+	if strings.HasPrefix(buf, "\033[M") && len(buf) >= 6 {
+		// X10 mouse encoding, the simplest one
+		// \033 [ M Cb Cx Cy
+		b := buf[3] - 32
+		switch b & 3 {
+		case 0:
+			if b&64 != 0 {
+				event.Key = MouseWheelUp
+			} else {
+				event.Key = MouseLeft
+			}
+		case 1:
+			if b&64 != 0 {
+				event.Key = MouseWheelDown
+			} else {
+				event.Key = MouseMiddle
+			}
+		case 2:
+			event.Key = MouseRight
+		case 3:
+			event.Key = MouseRelease
+		default:
+			return 6, false
+		}
+		event.Type = EventMouse // KeyEvent by default
+		if b&32 != 0 {
+			event.Mod |= ModMotion
+		}
+
+		// the coord is 1,1 for upper left
+		event.MouseX = int(buf[4]) - 1 - 32
+		event.MouseY = int(buf[5]) - 1 - 32
+		return 6, true
+	} else if strings.HasPrefix(buf, "\033[<") || strings.HasPrefix(buf, "\033[") {
+		// xterm 1006 extended mode or urxvt 1015 extended mode
+		// xterm: \033 [ < Cb ; Cx ; Cy (M or m)
+		// urxvt: \033 [ Cb ; Cx ; Cy M
+
+		// find the first M or m, that's where we stop
+		mi := strings.IndexAny(buf, "Mm")
+		if mi == -1 {
+			return 0, false
+		}
+
+		// whether it's a capital M or not
+		isM := buf[mi] == 'M'
+
+		// whether it's urxvt or not
+		isU := false
+
+		// buf[2] is safe here, because having M or m found means we have at
+		// least 3 bytes in a string
+		if buf[2] == '<' {
+			buf = buf[3:mi]
+		} else {
+			isU = true
+			buf = buf[2:mi]
+		}
+
+		s1 := strings.Index(buf, ";")
+		s2 := strings.LastIndex(buf, ";")
+		// not found or only one ';'
+		if s1 == -1 || s2 == -1 || s1 == s2 {
+			return 0, false
+		}
+
+		n1, err := strconv.ParseInt(buf[0:s1], 10, 64)
+		if err != nil {
+			return 0, false
+		}
+		n2, err := strconv.ParseInt(buf[s1+1:s2], 10, 64)
+		if err != nil {
+			return 0, false
+		}
+		n3, err := strconv.ParseInt(buf[s2+1:], 10, 64)
+		if err != nil {
+			return 0, false
+		}
+
+		// on urxvt, first number is encoded exactly as in X10, but we need to
+		// make it zero-based, on xterm it is zero-based already
+		if isU {
+			n1 -= 32