mirror of https://github.com/chzyer/readline.git
74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package readline
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type SegmentCompleter interface {
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// a
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// |- a1
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// |--- a11
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// |- a2
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// b
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// input:
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// DoTree([], 0) [a, b]
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// DoTree([a], 1) [a]
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// DoTree([a, ], 0) [a1, a2]
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// DoTree([a, a], 1) [a1, a2]
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// DoTree([a, a1], 2) [a1]
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// DoTree([a, a1, ], 0) [a11]
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// DoTree([a, a1, a], 1) [a11]
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DoSegment([][]rune, int) [][]rune
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}
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type dumpSegmentCompleter struct {
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f func([][]rune, int) [][]rune
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}
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func (d *dumpSegmentCompleter) DoSegment(segment [][]rune, n int) [][]rune {
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return d.f(segment, n)
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}
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func SegmentFunc(f func([][]rune, int) [][]rune) AutoCompleter {
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return &SegmentComplete{&dumpSegmentCompleter{f}}
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}
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type SegmentComplete struct {
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SegmentCompleter
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}
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func RetSegment(segments [][]rune, cands [][]rune, idx int) ([][]rune, int) {
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ret := make([][]rune, 0, len(cands))
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lastSegment := segments[len(segments)-1]
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for _, cand := range cands {
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if !runes.HasPrefix(cand, lastSegment) {
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continue
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}
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ret = append(ret, cand[len(lastSegment):])
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}
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return ret, idx
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}
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func SplitSegment(line []rune, pos int) ([][]rune, int) {
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segs := [][]rune{}
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lastIdx := -1
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line = line[:pos]
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pos = 0
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for idx, l := range line {
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if l == ' ' {
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pos = 0
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segs = append(segs, line[lastIdx+1:idx])
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lastIdx = idx
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} else {
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pos++
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}
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}
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segs = append(segs, line[lastIdx+1:])
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return segs, pos
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}
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func (c *SegmentComplete) Do(line []rune, pos int) (newLine [][]rune, offset int) {
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segment, idx := SplitSegment(line, pos)
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cands := c.DoSegment(segment, idx)
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newLine, offset = RetSegment(segment, cands, idx)
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return newLine, offset
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}
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