// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later

package screen

// Colors are RGB, tagged ANSI palette indices, or the terminal default.
const (
	ColorDefault uint32 = 1 << 31
	ColorIndexed uint32 = 1 << 30
	Bold         uint32 = 1
	Underline    uint32 = 6 // libvterm retains single/double/curly underline.
	Italic       uint32 = 8
	Blink        uint32 = 16
	Reverse      uint32 = 32
	Strike       uint32 = 64
	// VCSA high bit can mean blink, background intensity or a font bit. Keep
	// it for change/highlight detection without claiming a specific style.
	ConsoleHigh uint32 = 128
)

func (a Attribute) Default() bool {
	return a.Style == 0 && (a.Foreground == ColorDefault || a.Foreground == ColorIndexed|7) &&
		(a.Background == ColorDefault || a.Background == ColorIndexed)
}