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path: root/examples/go-dashboard/src/github.com/mattn/go-runewidth/runewidth.go
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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.go257
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)
-}