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cheat/internal/sheet/search.go

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package sheet
import (
"regexp"
"strings"
"github.com/mgutz/ansi"
)
// Search searches for regexp matches in a cheatsheet's text, and optionally
// colorizes matching strings.
func (s *Sheet) Search(reg *regexp.Regexp, colorize bool) []Match {
// record matches
matches := []Match{}
// search through the cheatsheet's text line by line
// TODO: searching line-by-line is surely the "naive" approach. Revisit this
// later with an eye for performance improvements.
for linenum, line := range strings.Split(s.Text, "\n") {
// exit early if the line doesn't match the regex
if !reg.MatchString(line) {
continue
}
// init the match
m := Match{
Line: linenum + 1,
Text: strings.TrimSpace(line),
}
// colorize the matching text if so configured
if colorize {
m.Text = reg.ReplaceAllStringFunc(m.Text, func(matched string) string {
return ansi.Color(matched, "red+b")
})
}
// record the match
matches = append(matches, m)
}
return matches
}