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Merge pull request #19 from Syuparn/enable-cursor
enable to use cursor
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "strings" | ||
|
|
||
| "github.com/peterh/liner" | ||
| ) | ||
|
|
||
| func newWordCompleter() liner.WordCompleter { | ||
| return func(line string, pos int) (head string, completions []string, tail string) { | ||
| head, partial, tail := splitLine(line, pos) | ||
|
|
||
| if partial == "" { | ||
| // match to nothing | ||
| return | ||
| } | ||
|
|
||
| // function auto-completes | ||
| for name := range funcMap() { | ||
| if strings.HasPrefix(name, partial) { | ||
| completions = append(completions, name) | ||
| } | ||
| } | ||
| return | ||
| } | ||
| } | ||
|
|
||
| func splitLine(line string, pos int) (head, partial, tail string) { | ||
| startPos := partialStartPos(line, pos, "{}()<>=| ") | ||
| endPos := partialEndPos(line, pos, "{}()<>=| ") | ||
|
|
||
| head = subStr(line, 0, startPos) | ||
| tail = subStr(line, endPos, len(line)) | ||
| partial = subStr(line, startPos, endPos) | ||
| return | ||
| } | ||
|
|
||
| func partialStartPos(line string, pos int, delims string) int { | ||
| delimPos := strings.LastIndexAny(subStr(line, 0, pos), delims) | ||
| if delimPos < 0 { | ||
| return 0 | ||
| } | ||
| return delimPos + 1 | ||
| } | ||
|
|
||
| func partialEndPos(line string, pos int, delims string) int { | ||
| relativeDelimPos := strings.IndexAny(subStr(line, pos, len(line)), delims) | ||
| if relativeDelimPos < 0 { | ||
| return len(line) | ||
| } | ||
| return pos + relativeDelimPos | ||
| } | ||
|
|
||
| func subStr(str string, start, end int) string { | ||
| if start >= len(str) { | ||
| return "" | ||
| } | ||
| if end <= 0 { | ||
| return "" | ||
| } | ||
|
|
||
| if end > len(str) { | ||
| end = len(str) | ||
| } | ||
| if start < 0 { | ||
| start = 0 | ||
| } | ||
|
|
||
| return str[start:end] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func TestNewCompleter(t *testing.T) { | ||
| c := newWordCompleter() | ||
|
|
||
| type completion struct { | ||
| head string | ||
| completions []string | ||
| tail string | ||
| } | ||
|
|
||
| tests := []struct { | ||
| title string | ||
| line string | ||
| pos int | ||
| expected completion | ||
| }{ | ||
| { | ||
| "empty", | ||
| "", | ||
| 0, | ||
| completion{ | ||
| head: "", | ||
| completions: []string{}, | ||
| tail: "", | ||
| }, | ||
| }, | ||
| { | ||
| "only partials", | ||
| "low", | ||
| 3, | ||
| completion{ | ||
| head: "", | ||
| completions: []string{"lower"}, | ||
| tail: "", | ||
| }, | ||
| }, | ||
| { | ||
| "cursor is not at the end", | ||
| "low", | ||
| 1, | ||
| completion{ | ||
| head: "", | ||
| completions: []string{"lower"}, | ||
| tail: "", | ||
| }, | ||
| }, | ||
| { | ||
| "two tokens", | ||
| "if low", | ||
| 6, | ||
| completion{ | ||
| head: "if ", | ||
| completions: []string{"lower"}, | ||
| tail: "", | ||
| }, | ||
| }, | ||
| { | ||
| "two tokens and cursor in the middle", | ||
| "if low", | ||
| 3, | ||
| completion{ | ||
| head: "if ", | ||
| completions: []string{"lower"}, | ||
| tail: "", | ||
| }, | ||
| }, | ||
| { | ||
| "cursor points non-function", | ||
| "if low", | ||
| 0, | ||
| completion{ | ||
| head: "", | ||
| completions: []string{}, | ||
| tail: " low", | ||
| }, | ||
| }, | ||
| { | ||
| "many tokens (cursor at the end)", | ||
| "1 | add int6", | ||
| 12, | ||
| completion{ | ||
| head: "1 | add ", | ||
| completions: []string{"int64"}, | ||
| tail: "", | ||
| }, | ||
| }, | ||
| { | ||
| "many tokens (cursor in the middle)", | ||
| "1 | ad int64", | ||
| 4, | ||
| completion{ | ||
| head: "1 | ", | ||
| completions: []string{"add", "add1f", "add1", "addf", "adler32sum"}, | ||
| tail: " int64", | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| for _, tt := range tests { | ||
| t.Run(tt.title, func(t *testing.T) { | ||
| head, completions, tail := c(tt.line, tt.pos) | ||
|
|
||
| assert.Equal(t, tt.expected.head, head, "wrong head") | ||
| assert.ElementsMatch(t, tt.expected.completions, completions, "wrong completions") | ||
| assert.Equal(t, tt.expected.tail, tail, "wrong tail") | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func allFuncNames() []string { | ||
| names := []string{} | ||
| for name := range funcMap() { | ||
| names = append(names, name) | ||
| } | ||
| return names | ||
| } |
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