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use std::ffi::{CString, OsStr};
use std::io::{self, Write};
use std::os::unix::prelude::OsStrExt;
use std::os::unix::process::CommandExt;
use std::path::PathBuf;
use std::process::{Command, Stdio};
use std::ptr::null_mut;
use std::time::Duration;
use anyhow::{ensure, Context};
use directories::UserDirs;
use smithay::reexports::rustix::time::{clock_gettime, ClockId};
use smithay::utils::{Logical, Point, Rectangle};
use crate::config::Config;
pub fn get_monotonic_time() -> Duration {
let ts = clock_gettime(ClockId::Monotonic);
Duration::new(ts.tv_sec as u64, ts.tv_nsec as u32)
}
pub fn center(rect: Rectangle<i32, Logical>) -> Point<i32, Logical> {
rect.loc + rect.size.downscale(2).to_point()
}
pub fn make_screenshot_path(config: &Config) -> anyhow::Result<Option<PathBuf>> {
let Some(path) = &config.screenshot_path else {
return Ok(None);
};
let format = CString::new(path.clone()).context("path must not contain nul bytes")?;
let mut buf = [0u8; 2048];
let mut path;
unsafe {
let time = libc::time(null_mut());
ensure!(time != -1, "error in time()");
let tm = libc::localtime(&time);
ensure!(!tm.is_null(), "error in localtime()");
let rv = libc::strftime(buf.as_mut_ptr().cast(), buf.len(), format.as_ptr(), tm);
ensure!(rv != 0, "error formatting time");
path = PathBuf::from(OsStr::from_bytes(&buf[..rv]));
}
if let Ok(rest) = path.strip_prefix("~") {
let dirs = UserDirs::new().context("error retrieving home directory")?;
path = [dirs.home_dir(), rest].iter().collect();
}
Ok(Some(path))
}
/// Spawns the command to run independently of the compositor.
pub fn spawn(command: impl AsRef<OsStr>, args: impl IntoIterator<Item = impl AsRef<OsStr>>) {
let _span = tracy_client::span!();
let command = command.as_ref();
let mut process = Command::new(command);
process
.args(args)
.stdin(Stdio::null())
.stdout(Stdio::null())
.stderr(Stdio::null());
// Double-fork to avoid having to waitpid the child.
unsafe {
process.pre_exec(|| {
match libc::fork() {
-1 => return Err(io::Error::last_os_error()),
0 => (),
_ => libc::_exit(0),
}
Ok(())
});
}
let mut child = match process.spawn() {
Ok(child) => child,
Err(err) => {
warn!("error spawning {command:?}: {err:?}");
return;
}
};
match child.wait() {
Ok(status) => {
if !status.success() {
warn!("child did not exit successfully: {status:?}");
}
}
Err(err) => {
warn!("error waiting for child: {err:?}");
}
}
}
pub fn write_png_rgba8(
w: impl Write,
width: u32,
height: u32,
pixels: &[u8],
) -> Result<(), png::EncodingError> {
let mut encoder = png::Encoder::new(w, width, height);
encoder.set_color(png::ColorType::Rgba);
encoder.set_depth(png::BitDepth::Eight);
let mut writer = encoder.write_header()?;
writer.write_image_data(pixels)
}
#[cfg(feature = "dbus")]
pub fn show_screenshot_notification(image_path: Option<PathBuf>) {
let mut notification = notify_rust::Notification::new();
notification
.summary("Screenshot captured")
.body("You can paste the image from the clipboard.")
.urgency(notify_rust::Urgency::Normal)
.hint(notify_rust::Hint::Transient(true));
// Try to add the screenshot as an image if possible.
if let Some(path) = image_path {
match path.canonicalize() {
Ok(path) => match url::Url::from_file_path(path) {
Ok(url) => {
notification.image_path(url.as_str());
}
Err(err) => {
warn!("error converting screenshot path to file url: {err:?}");
}
},
Err(err) => {
warn!("error canonicalizing screenshot path: {err:?}");
}
}
}
if let Err(err) = notification.show() {
warn!("error showing screenshot notification: {err:?}");
}
}
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