Fixes a bug in the minibuffer/cmdline when nothing has been typed

When the minibuffer is first opened, I don't display the completion
options because it looks better to have a single line for typing at the
bottom, and not an immediately cluttered screen. But if the user hits
tab or enter, then the cmdline will show options. But prior to this
change, hitting enter on a selection that is shown after opening the
minibuffer and immediately hitting tab would not complete that
selection.

widgets/minibuffer/minibuffer.go

@@ -98,7 +98,7 @@ func (w *keysWidget) UserInput(ev interface{}, size gowid.IRenderSize, focus gow
 		case tcell.KeyDown, tcell.KeyCtrlN, tcell.KeyUp, tcell.KeyCtrlP:
 			res = w.top.UserInput(ev, size, focus, app)
 		case tcell.KeyTAB, tcell.KeyEnter:
-			w.outer.handleEnter(ev.Key() == tcell.KeyEnter, app)
+			w.outer.handleSelection(ev.Key() == tcell.KeyEnter, app)
 			res = true
 		case tcell.KeyBackspace, tcell.KeyBackspace2:
 			if w.outer.ed.Text() == "" {
@@ -175,7 +175,7 @@ func New() *Widget {
 	return res
 }
 
-func (w *Widget) handleEnter(enter bool, app gowid.IApp) {
+func (w *Widget) handleSelection(keyIsEnter bool, app gowid.IApp) {
 	// Break edit text up into "words"
 
 	// gcla later todo - need to check it's not nil
@@ -200,7 +200,7 @@ func (w *Widget) handleEnter(enter bool, app gowid.IApp) {
 		//					case 1:
 		case 0:
 			// "load /tmp/foo" and []  - just run what the user typed if the key was enter
-			if act, ok := w.actions[words[0]]; ok && enter {
+			if act, ok := w.actions[words[0]]; ok && keyIsEnter {
 				err := act.Run(app, words...)
 				if err == nil {
 					// Run the command, let it handle errors
@@ -211,7 +211,7 @@ func (w *Widget) handleEnter(enter bool, app gowid.IApp) {
 			}
 		default:
 			// if the last word exactly equals the one selected in the partials, just run on enter
-			if words[len(words)-1] == partials[selectedIdx].word && enter {
+			if words[len(words)-1] == partials[selectedIdx].word && keyIsEnter {
 				// "load /tmp/foo.pcap" and ["/tmp/foo.pcap"]
 				if act, ok := w.actions[words[0]]; ok {
 					err := act.Run(app, words...)
@@ -238,7 +238,7 @@ func (w *Widget) handleEnter(enter bool, app gowid.IApp) {
 		partials := w.getPartialsCompletions(false, app)
 		switch len(partials) {
 		case 0:
-			if act, ok := w.actions[words[0]]; ok && enter {
+			if act, ok := w.actions[words[0]]; ok && keyIsEnter {
 				err := act.Run(app, words...)
 				if err == nil {
 					// Run the command, let it handle errors
@@ -248,8 +248,7 @@ func (w *Widget) handleEnter(enter bool, app gowid.IApp) {
 				}
 			}
 		default:
-			//act := w.actions[partials[len(partials)-1].word]
-			if words[len(words)-1] == partials[selectedIdx].word && enter {
+			if words[len(words)-1] == partials[selectedIdx].word && keyIsEnter {
 				act := w.actions[partials[selectedIdx].word]
 				if len(act.Arguments([]string{})) == 0 {
 					err := w.actions[partials[selectedIdx].word].Run(app, partials[selectedIdx].word)
@@ -266,12 +265,16 @@ func (w *Widget) handleEnter(enter bool, app gowid.IApp) {
 		}
 
 	default:
-		// Nothing typed, hitting tab or enter shows all commands
-		w.showAll = true
-		w.updateCompletions(app)
-
+		if w.selections == nil {
+			w.showAll = true
+			w.updateCompletions(app)
+		} else if keyIsEnter {
+			// if the selections are being displayed and enter is hit, complete that selection
+			partials := w.getPartialsCompletions(true, app)
+			w.ed.SetText(partials[selectedIdx].line, app)
+			w.ed.SetCursorPos(partials[selectedIdx].cp, app)
+		}
 	}
-
 }
 
 // Not thread-safe, manage via App perhaps
@@ -365,6 +368,7 @@ func (w *Widget) updateCompletions(app gowid.IApp) {
 	if txt != "" || w.showAll {
 		partials = w.getPartialsCompletions(true, app)
 	}
+	w.showAll = false
 
 	for _, partialV := range partials {
 		partial := partialV // avoid gotcha