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// This file is part of file-descriptors. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/file-descriptors/master/COPYRIGHT. No part of file-descriptors, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2019 The developers of file-descriptors. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/file-descriptors/master/COPYRIGHT.
/// Abstracts the canonical setting of the echoing of the `KILL` character.
///
/// Defaults to `CanonicalEchoKillCharacter::Off`, which is the most sensible choice.
#[derive(EnumIter, Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[cfg_attr(not(any(target_os = "ios", target_os = "macos")), repr(u32))]
#[cfg_attr(all(any(target_os = "ios", target_os = "macos"), target_pointer_width = "32"), repr(u32))]
#[cfg_attr(all(any(target_os = "ios", target_os = "macos"), target_pointer_width = "64"), repr(u64))]
pub enum CanonicalEchoKillCharacter
{
/// No echoing.
///
/// This is the default.
Off = 0,
/// If set then the `KILL` character either erases the current line from the display or outputs the new line, `NL`, character (to emphasize that the entire line was erased).
///
/// This flag is disabled by setting the `ECHOKE` flag.
///
/// This occurs irrespective of whether the terminal has been set to echo its input.
///
/// Equivalent to the `ECHOK` flag.
K = ECHOK,
/// If set then the `KILL` character is echoed by erasing each character on the line.
/// The way in which each character is erased is selected by the `ECHOE` and `ECHOPRT` flags.
///
/// Setting this flag disables the `ECHOK` flag.
///
/// This occurs irrespective of whether the terminal has been set to echo its input.
///
/// Equivalent to the `ECHOKE` flag.
Erase = ECHOKE,
}
impl Default for CanonicalEchoKillCharacter
{
#[inline(always)]
fn default() -> Self
{
CanonicalEchoKillCharacter::Off
}
}
impl CanonicalEchoKillCharacter
{
#[inline(always)]
pub(crate) fn interprete_mode_flags(current_flags: tcflag_t) -> Self
{
use self::CanonicalEchoKillCharacter::*;
// Test for ECHOKE before ECHOK as ECHOKE overrides ECHOK.
if current_flags & ECHOKE != 0
{
Erase
}
else if current_flags & ECHOK != 0
{
K
}
else
{
Off
}
}
}