commit 2cb8cf5

Support cycling backward in auto-completions

 1@@ -444,7 +444,12 @@ func (app *App) handleKeyEvent(ev *tcell.EventKey) {
 2 			app.updatePrompt()
 3 		}
 4 	case tcell.KeyTab:
 5-		ok := app.win.InputAutoComplete()
 6+		ok := app.win.InputAutoComplete(1)
 7+		if ok {
 8+			app.typing()
 9+		}
10+	case tcell.KeyBacktab:
11+		ok := app.win.InputAutoComplete(-1)
12 		if ok {
13 			app.typing()
14 		}

 1@@ -212,23 +212,21 @@ func (e *Editor) Down() {
 2 	e.End()
 3 }
 4 
 5-func (e *Editor) AutoComplete() (ok bool) {
 6+func (e *Editor) AutoComplete(offset int) (ok bool) {
 7 	if e.autoCache == nil {
 8 		e.autoCache = e.autoComplete(e.cursorIdx, e.text[e.lineIdx])
 9-		if e.autoCache == nil {
10-			return false
11-		}
12 		if len(e.autoCache) == 0 {
13 			e.autoCache = nil
14 			return false
15 		}
16 		e.autoCacheIdx = 0
17+	} else {
18+		e.autoCacheIdx = (e.autoCacheIdx + len(e.autoCache) + offset) % len(e.autoCache)
19 	}
20 
21 	e.text[e.lineIdx] = e.autoCache[e.autoCacheIdx].Text
22 	e.cursorIdx = e.autoCache[e.autoCacheIdx].CursorIdx
23 	e.computeTextWidth()
24-	e.autoCacheIdx = (e.autoCacheIdx + 1) % len(e.autoCache)
25 	if len(e.textWidth) <= e.offsetIdx {
26 		e.offsetIdx = 0
27 	}

 1@@ -192,8 +192,8 @@ func (ui *UI) InputDelete() (ok bool) {
 2 	return ui.e.RemRuneForward()
 3 }
 4 
 5-func (ui *UI) InputAutoComplete() (ok bool) {
 6-	return ui.e.AutoComplete()
 7+func (ui *UI) InputAutoComplete(offset int) (ok bool) {
 8+	return ui.e.AutoComplete(offset)
 9 }
10 
11 func (ui *UI) InputEnter() (content string) {