Function countCmdLeaves

internal/tui/resize_test.go:218–239

countCmdLeaves runs cmd, recurses into the slice-shaped []tea.Cmd payload of tea.BatchMsg / tea.sequenceMsg (both unexported), and counts leaves where match holds, asserting what a Sequence emits without importing bubbletea's internal types.

(cmd tea.Cmd, match func(tea.Cmd, tea.Msg) bool)

// where match holds, asserting what a Sequence emits without importing
// bubbletea's internal types.
func countCmdLeaves(cmd tea.Cmd, match func(tea.Cmd, tea.Msg) bool) int {
	if cmd == nil {
		return 0
	}
	msg := cmd()
	if match(cmd, msg) {
		return 1
	}
	rv := reflect.ValueOf(msg)
	if rv.Kind() != reflect.Slice {
		return 0
	}
	n := 0
	for i := 0; i < rv.Len(); i++ {
		c, ok := rv.Index(i).Interface().(tea.Cmd)
		if !ok {
			continue
		}
		n += countCmdLeaves(c, match)
	}
	return n
}

func cmdYieldsClearScreen(cmd tea.Cmd) bool {
	target := reflect.TypeOf(tea.ClearScreen())