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Update ANSI processor to handle more VT-100 escape sequences

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The updated regular expression should include not all but most of the
frequently used ANSI sequences. Close #735.
This commit is contained in:
Junegunn Choi 2016-11-14 02:13:16 +09:00
parent a2beb159f1
commit dc557c0d4c
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GPG Key ID: 254BC280FEF9C627
2 changed files with 13 additions and 4 deletions
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13
src/ansi.go
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@ -35,7 +35,16 @@ func (s *ansiState) equals(t *ansiState) bool {
var ansiRegex *regexp.Regexp
func init() {
ansiRegex = regexp.MustCompile("\x1b\\[[0-9;]*.|[\x0e\x0f]")
/*
References:
- https://github.com/gnachman/iTerm2
- http://ascii-table.com/ansi-escape-sequences.php
- http://ascii-table.com/ansi-escape-sequences-vt-100.php
- http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x405.html
*/
// The following regular expression will include not all but most of the
// frequently used ANSI sequences
ansiRegex = regexp.MustCompile("\x1b[\\[()][0-9;]*[a-zA-Z@]|\x1b.|[\x08\x0e\x0f]")
}
func extractColor(str string, state *ansiState, proc func(string, *ansiState) bool) (string, *[]ansiOffset, *ansiState) {
@ -100,7 +109,7 @@ func interpretCode(ansiCode string, prevState *ansiState) *ansiState {
} else {
state = &ansiState{prevState.fg, prevState.bg, prevState.attr}
}
if ansiCode[0] != '\x1b' || ansiCode[len(ansiCode)-1] != 'm' {
if ansiCode[0] != '\x1b' || ansiCode[1] != '[' || ansiCode[len(ansiCode)-1] != 'm' {
return state
}

4
src/ansi_test.go
View File

@ -26,7 +26,7 @@ func TestExtractColor(t *testing.T) {
output, ansiOffsets, newState := extractColor(src, state, nil)
state = newState
if output != "hello world" {
t.Errorf("Invalid output: {}", output)
t.Errorf("Invalid output: %s %s", output, []rune(output))
}
fmt.Println(src, ansiOffsets, clean)
assertion(ansiOffsets, state)
@ -56,7 +56,7 @@ func TestExtractColor(t *testing.T) {
})
state = nil
src = "\x1b[1mhello \x1b[mworld"
src = "\x1b[1mhello \x1b[mw\x1b7o\x1b8r\x1b(Bl\x1b[2@d"
check(func(offsets *[]ansiOffset, state *ansiState) {
if len(*offsets) != 1 {
t.Fail()