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readline
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main
complete_segment.go
82 строки
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chzyer
[completer] add SegmentAutoComplete
12 апр 2016, 09:04
12 апр 2016, 09:04
52d8a65
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package readline type SegmentCompleter interface { // a // |- a1 // |--- a11 // |- a2 // b // input: // DoTree([], 0) [a, b] // DoTree([a], 1) [a] // DoTree([a, ], 0) [a1, a2] // DoTree([a, a], 1) [a1, a2] // DoTree([a, a1], 2) [a1] // DoTree([a, a1, ], 0) [a11] // DoTree([a, a1, a], 1) [a11] DoSegment([][]rune, int) [][]rune } type dumpSegmentCompleter struct { f func([][]rune, int) [][]rune } func (d *dumpSegmentCompleter) DoSegment(segment [][]rune, n int) [][]rune { return d.f(segment, n) } func SegmentFunc(f func([][]rune, int) [][]rune) AutoCompleter { return &SegmentComplete{&dumpSegmentCompleter{f}} } func SegmentAutoComplete(completer SegmentCompleter) *SegmentComplete { return &SegmentComplete{ SegmentCompleter: completer, } } type SegmentComplete struct { SegmentCompleter } func RetSegment(segments [][]rune, cands [][]rune, idx int) ([][]rune, int) { ret := make([][]rune, 0, len(cands)) lastSegment := segments[len(segments)-1] for _, cand := range cands { if !runes.HasPrefix(cand, lastSegment) { continue } ret = append(ret, cand[len(lastSegment):]) } return ret, idx } func SplitSegment(line []rune, pos int) ([][]rune, int) { segs := [][]rune{} lastIdx := -1 line = line[:pos] pos = 0 for idx, l := range line { if l == ' ' { pos = 0 segs = append(segs, line[lastIdx+1:idx]) lastIdx = idx } else { pos++ } } segs = append(segs, line[lastIdx+1:]) return segs, pos } func (c *SegmentComplete) Do(line []rune, pos int) (newLine [][]rune, offset int) { segment, idx := SplitSegment(line, pos) cands := c.DoSegment(segment, idx) newLine, offset = RetSegment(segment, cands, idx) for idx := range newLine { newLine[idx] = append(newLine[idx], ' ') } return newLine, offset }