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//! Windows-specific style queries
#[cfg(windows)]
mod windows_console {
use std::os::windows::io::AsRawHandle;
use std::os::windows::io::RawHandle;
use windows_sys::Win32::System::Console::CONSOLE_MODE;
use windows_sys::Win32::System::Console::ENABLE_VIRTUAL_TERMINAL_PROCESSING;
fn enable_vt(handle: RawHandle) -> std::io::Result<()> {
unsafe {
let handle = std::mem::transmute(handle);
if handle == 0 {
return Err(std::io::Error::new(
std::io::ErrorKind::BrokenPipe,
"console is detached",
));
}
let mut dwmode: CONSOLE_MODE = 0;
if windows_sys::Win32::System::Console::GetConsoleMode(handle, &mut dwmode) == 0 {
return Err(std::io::Error::last_os_error());
}
dwmode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if windows_sys::Win32::System::Console::SetConsoleMode(handle, dwmode) == 0 {
return Err(std::io::Error::last_os_error());
}
Ok(())
}
}
pub fn enable_virtual_terminal_processing() -> std::io::Result<()> {
let stdout = std::io::stdout();
let stdout_handle = stdout.as_raw_handle();
let stderr = std::io::stderr();
let stderr_handle = stderr.as_raw_handle();
enable_vt(stdout_handle)?;
if stdout_handle != stderr_handle {
enable_vt(stderr_handle)?;
}
Ok(())
}
#[inline]
pub(crate) fn enable_ansi_colors() -> Option<bool> {
Some(
enable_virtual_terminal_processing()
.map(|_| true)
.unwrap_or(false),
)
}
}
#[cfg(not(windows))]
mod windows_console {
#[inline]
pub(crate) fn enable_ansi_colors() -> Option<bool> {
None
}
}
/// Enable ANSI escape codes (ENABLE_VIRTUAL_TERMINAL_PROCESSING)
///
/// For non-windows systems, returns `None`
pub fn enable_ansi_colors() -> Option<bool> {
windows_console::enable_ansi_colors()
}
/// Raw ENABLE_VIRTUAL_TERMINAL_PROCESSING on stdout/stderr
#[cfg(windows)]
pub fn enable_virtual_terminal_processing() -> std::io::Result<()> {
windows_console::enable_virtual_terminal_processing()
}
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