diff options
Diffstat (limited to 'examples/go-dashboard/src/github.com/mattn/go-runewidth/runewidth.go')
-rw-r--r-- | examples/go-dashboard/src/github.com/mattn/go-runewidth/runewidth.go | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/examples/go-dashboard/src/github.com/mattn/go-runewidth/runewidth.go b/examples/go-dashboard/src/github.com/mattn/go-runewidth/runewidth.go deleted file mode 100644 index 19f8e0449..000000000 --- a/examples/go-dashboard/src/github.com/mattn/go-runewidth/runewidth.go +++ /dev/null @@ -1,257 +0,0 @@ -package runewidth - -import ( - "os" -) - -//go:generate go run script/generate.go - -var ( - // EastAsianWidth will be set true if the current locale is CJK - EastAsianWidth bool - - // ZeroWidthJoiner is flag to set to use UTR#51 ZWJ - ZeroWidthJoiner bool - - // DefaultCondition is a condition in current locale - DefaultCondition = &Condition{} -) - -func init() { - handleEnv() -} - -func handleEnv() { - env := os.Getenv("RUNEWIDTH_EASTASIAN") - if env == "" { - EastAsianWidth = IsEastAsian() - } else { - EastAsianWidth = env == "1" - } - // update DefaultCondition - DefaultCondition.EastAsianWidth = EastAsianWidth - DefaultCondition.ZeroWidthJoiner = ZeroWidthJoiner -} - -type interval struct { - first rune - last rune -} - -type table []interval - -func inTables(r rune, ts ...table) bool { - for _, t := range ts { - if inTable(r, t) { - return true - } - } - return false -} - -func inTable(r rune, t table) bool { - if r < t[0].first { - return false - } - - bot := 0 - top := len(t) - 1 - for top >= bot { - mid := (bot + top) >> 1 - - switch { - case t[mid].last < r: - bot = mid + 1 - case t[mid].first > r: - top = mid - 1 - default: - return true - } - } - - return false -} - -var private = table{ - {0x00E000, 0x00F8FF}, {0x0F0000, 0x0FFFFD}, {0x100000, 0x10FFFD}, -} - -var nonprint = table{ - {0x0000, 0x001F}, {0x007F, 0x009F}, {0x00AD, 0x00AD}, - {0x070F, 0x070F}, {0x180B, 0x180E}, {0x200B, 0x200F}, - {0x2028, 0x202E}, {0x206A, 0x206F}, {0xD800, 0xDFFF}, - {0xFEFF, 0xFEFF}, {0xFFF9, 0xFFFB}, {0xFFFE, 0xFFFF}, -} - -// Condition have flag EastAsianWidth whether the current locale is CJK or not. -type Condition struct { - EastAsianWidth bool - ZeroWidthJoiner bool -} - -// NewCondition return new instance of Condition which is current locale. -func NewCondition() *Condition { - return &Condition{ - EastAsianWidth: EastAsianWidth, - ZeroWidthJoiner: ZeroWidthJoiner, - } -} - -// RuneWidth returns the number of cells in r. -// See http://www.unicode.org/reports/tr11/ -func (c *Condition) RuneWidth(r rune) int { - switch { - case r < 0 || r > 0x10FFFF || inTables(r, nonprint, combining, notassigned): - return 0 - case (c.EastAsianWidth && IsAmbiguousWidth(r)) || inTables(r, doublewidth): - return 2 - default: - return 1 - } -} - -func (c *Condition) stringWidth(s string) (width int) { - for _, r := range []rune(s) { - width += c.RuneWidth(r) - } - return width -} - -func (c *Condition) stringWidthZeroJoiner(s string) (width int) { - r1, r2 := rune(0), rune(0) - for _, r := range []rune(s) { - if r == 0xFE0E || r == 0xFE0F { - continue - } - w := c.RuneWidth(r) - if r2 == 0x200D && inTables(r, emoji) && inTables(r1, emoji) { - if width < w { - width = w - } - } else { - width += w - } - r1, r2 = r2, r - } - return width -} - -// StringWidth return width as you can see -func (c *Condition) StringWidth(s string) (width int) { - if c.ZeroWidthJoiner { - return c.stringWidthZeroJoiner(s) - } - return c.stringWidth(s) -} - -// Truncate return string truncated with w cells -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 -} - -// Wrap return string wrapped with w cells -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 -} - -// FillLeft return string filled in left by spaces in w cells -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 -} - -// FillRight return string filled in left by spaces in w cells -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) -} - -// IsAmbiguousWidth returns whether is ambiguous width or not. -func IsAmbiguousWidth(r rune) bool { - return inTables(r, private, ambiguous) -} - -// IsNeutralWidth returns whether is neutral width or not. -func IsNeutralWidth(r rune) bool { - return inTable(r, neutral) -} - -// StringWidth return width as you can see -func StringWidth(s string) (width int) { - return DefaultCondition.StringWidth(s) -} - -// Truncate return string truncated with w cells -func Truncate(s string, w int, tail string) string { - return DefaultCondition.Truncate(s, w, tail) -} - -// Wrap return string wrapped with w cells -func Wrap(s string, w int) string { - return DefaultCondition.Wrap(s, w) -} - -// FillLeft return string filled in left by spaces in w cells -func FillLeft(s string, w int) string { - return DefaultCondition.FillLeft(s, w) -} - -// FillRight return string filled in left by spaces in w cells -func FillRight(s string, w int) string { - return DefaultCondition.FillRight(s, w) -} |