feat(form): expose focused field (#503)

Author: jonas-grgt

form.go

@@ -479,6 +479,11 @@ func (f *Form) PrevField() tea.Cmd {
 	return cmd
 }
 
+// GetFocusedField returns the focused form field.
+func (f *Form) GetFocusedField() Field {
+	return f.selector.Selected().selector.Selected()
+}
+
 // Init initializes the form.
 func (f *Form) Init() tea.Cmd {
 	cmds := make([]tea.Cmd, f.selector.Total())

huh_test.go

@@ -918,6 +918,24 @@ func TestAbort(t *testing.T) {
 	}
 }
 
+func TestGetFocusedField(t *testing.T) {
+	f := NewForm(
+		NewGroup(
+			NewInput().Title("First").Key("First"),
+			NewInput().Title("Second").Key("Second"),
+			NewInput().Title("Third").Key("Third"),
+		),
+	).WithWidth(25)
+	f = batchUpdate(f, f.Init()).(*Form)
+
+	f.NextField()
+	field := f.GetFocusedField()
+
+	if field.GetKey() != "Second" {
+		t.Error("Expected Second field to be focused but was '" + field.GetKey() + "'")
+	}
+}
+
 // formProgram returns a new Form with a nil input and output, so it can be used as a test program.
 func formProgram() *Form {
 	return NewForm(NewGroup(NewInput().Title("Foo"))).