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utils.go
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/
utils.go
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package main
import (
"regexp"
"strings"
"github.com/sourcegraph/go-lsp"
)
var nonEmptyString = regexp.MustCompile(`\S+`)
// WordAt returns word at certain postition
func (s *server) WordAt(uri lsp.DocumentURI, pos lsp.Position) string {
text, ok := s.documents[uri]
if !ok {
return ""
}
lines := strings.Split(text, "\n")
if pos.Line < 0 || pos.Line > len(lines) {
return ""
}
curLine := lines[pos.Line]
wordIdxs := nonEmptyString.FindAllStringIndex(curLine, -1)
for _, wordIdx := range wordIdxs {
if wordIdx[0] <= pos.Character && pos.Character < wordIdx[1] {
return curLine[wordIdx[0]:wordIdx[1]]
}
}
return ""
}