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Monorepo for Tangled
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1.2 kB · 49 lines
Go
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import "sort"
// helper functions to render search match highlights
// mergeIntervals sorts half-open rune intervals and merges overlapping/adjacent ones.func mergeIntervals(in [][2]int) [][2]int { if len(in) < 2 { return in } sort.Slice(in, func(i, j int) bool { return in[i][0] < in[j][0] }) out := in[:1] for _, iv := range in[1:] { last := &out[len(out)-1] if iv[0] <= last[1] { if iv[1] > last[1] { last[1] = iv[1] } continue } out = append(out, iv) } return out}
// spanRunes splits runes into alternating unmatched/matched ChunkSpans using the// (sorted, merged) match intervals. Returns nil for an empty line.func spanRunes(runes []rune, intervals [][2]int) []ChunkSpan { if len(runes) == 0 { return nil } if len(intervals) == 0 { return []ChunkSpan{{Text: string(runes)}} } var spans []ChunkSpan pos := 0 for _, iv := range intervals { if iv[0] > pos { spans = append(spans, ChunkSpan{Text: string(runes[pos:iv[0]])}) } spans = append(spans, ChunkSpan{Text: string(runes[iv[0]:iv[1]]), Match: true}) pos = iv[1] } if pos < len(runes) { spans = append(spans, ChunkSpan{Text: string(runes[pos:])}) } return spans}