Add autocomplete

internal/action/actions.go

@@ -560,10 +560,22 @@ func (h *BufPane) OutdentSelection() bool {
 
 // InsertTab inserts a tab or spaces
 func (h *BufPane) InsertTab() bool {
-	indent := h.Buf.IndentString(util.IntOpt(h.Buf.Settings["tabsize"]))
-	tabBytes := len(indent)
-	bytesUntilIndent := tabBytes - (h.Cursor.GetVisualX() % tabBytes)
-	h.Buf.Insert(h.Cursor.Loc, indent[:bytesUntilIndent])
+	b := h.Buf
+	if b.HasSuggestions {
+		b.CycleAutocomplete(true)
+		return true
+	}
+
+	l := b.LineBytes(h.Cursor.Y)
+	l = util.SliceStart(l, h.Cursor.X)
+	hasComplete := b.Autocomplete(buffer.BufferComplete)
+	if !hasComplete {
+		indent := b.IndentString(util.IntOpt(b.Settings["tabsize"]))
+		tabBytes := len(indent)
+		bytesUntilIndent := tabBytes - (h.Cursor.GetVisualX() % tabBytes)
+		b.Insert(h.Cursor.Loc, indent[:bytesUntilIndent])
+		return true
+	}
 	return true
 }
 

internal/action/bufpane.go

@@ -227,6 +227,9 @@ func (h *BufPane) HandleEvent(event tcell.Event) {
 func (h *BufPane) DoKeyEvent(e Event) bool {
 	if action, ok := BufKeyBindings[e]; ok {
 		estr := BufKeyStrings[e]
+		if estr != "InsertTab" {
+			h.Buf.HasSuggestions = false
+		}
 		for _, s := range MultiActions {
 			if s == estr {
 				cursors := h.Buf.GetCursors()

internal/action/infopane.go

@@ -157,12 +157,17 @@ var InfoOverrides = map[string]InfoKeyAction{
 	"QuitAll":       (*InfoPane).QuitAll,
 }
 
+// CursorUp cycles history up
 func (h *InfoPane) CursorUp() {
 	h.UpHistory(h.History[h.PromptType])
 }
+
+// CursorDown cycles history down
 func (h *InfoPane) CursorDown() {
 	h.DownHistory(h.History[h.PromptType])
 }
+
+// InsertTab begins autocompletion
 func (h *InfoPane) InsertTab() {
 	b := h.Buf
 	if b.HasSuggestions {
@@ -187,22 +192,32 @@ func (h *InfoPane) InsertTab() {
 		}
 	}
 }
+
+// CycleBack cycles back in the autocomplete suggestion list
 func (h *InfoPane) CycleBack() {
 	if h.Buf.HasSuggestions {
 		h.Buf.CycleAutocomplete(false)
 	}
 }
+
+// InsertNewline completes the prompt
 func (h *InfoPane) InsertNewline() {
 	if !h.HasYN {
 		h.DonePrompt(false)
 	}
 }
+
+// Quit cancels the prompt
 func (h *InfoPane) Quit() {
 	h.DonePrompt(true)
 }
+
+// QuitAll cancels the prompt
 func (h *InfoPane) QuitAll() {
 	h.DonePrompt(true)
 }
+
+// Escape cancels the prompt
 func (h *InfoPane) Escape() {
 	h.DonePrompt(true)
 }