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Add buffer.WordAt (#2070)

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Add buffer.WordAt function returning the word around a given location
in the buffer. Useful for plugins.
This commit is contained in:
Dmitry Maluka 2021-04-07 22:20:39 +02:00 committed by GitHub
parent c5798b5b8c
commit 1f73f8587c
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1 changed files with 21 additions and 0 deletions
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21
internal/buffer/buffer.go
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@ -545,6 +545,27 @@ func (b *Buffer) RuneAt(loc Loc) rune {
return '\n'
}
// WordAt returns the word around a given location in the buffer
func (b *Buffer) WordAt(loc Loc) []byte {
if len(b.LineBytes(loc.Y)) == 0 || !util.IsWordChar(b.RuneAt(loc)) {
return []byte{}
}
start := loc
end := loc.Move(1, b)
for start.X > 0 && util.IsWordChar(b.RuneAt(start.Move(-1, b))) {
start.X--
}
lineLen := util.CharacterCount(b.LineBytes(loc.Y))
for end.X < lineLen && util.IsWordChar(b.RuneAt(end)) {
end.X++
}
return b.Substr(start, end)
}
// Modified returns if this buffer has been modified since
// being opened
func (b *Buffer) Modified() bool {