39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
package core
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import (
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"regexp"
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"strings"
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)
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// ansiCSI matches CSI sequences: ESC [ ... <final byte>
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// Covers colors (SGR), cursor movement, erase, etc.
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var ansiCSI = regexp.MustCompile(`\x1b\[[0-9;?]*[ -/]*[@-~]`)
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// ansiOSC matches OSC sequences: ESC ] ... <BEL or ST>
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// Used for window titles, hyperlinks, etc.
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var ansiOSC = regexp.MustCompile(`\x1b\][^\x07\x1b]*(\x07|\x1b\\)`)
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// ansiEsc matches other two-character escape sequences: ESC <char>
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// Covers ESC c (reset), ESC ( B, ESC ) 0, etc.
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var ansiEsc = regexp.MustCompile(`\x1b[@-Z\\-_]|\x1b[()][0-9A-Za-z]`)
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// StripANSI removes ANSI/VT100 terminal escape sequences from s and filters
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// non-printable control characters, preserving newlines (\n), tabs (\t) and
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// carriage returns (\r).
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func StripANSI(s string) string {
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s = ansiCSI.ReplaceAllString(s, "")
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s = ansiOSC.ReplaceAllString(s, "")
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s = ansiEsc.ReplaceAllString(s, "")
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return strings.Map(func(r rune) rune {
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// Preserve printable characters, \n (0x0A), \t (0x09), \r (0x0D).
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if r == '\n' || r == '\t' || r == '\r' {
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return r
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}
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// Drop C0 control characters (0x00-0x1F) and DEL (0x7F).
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if r < 0x20 || r == 0x7F {
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return -1
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}
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return r
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}, s)
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}
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