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use {
crate::{
app::AppContext,
display::{
DisplayableTree,
Screen,
W,
},
errors::ProgramError,
skin::{
ExtColorMap,
StyleMap,
},
tree::Tree,
},
crossterm::{
cursor,
event::{DisableMouseCapture, EnableMouseCapture},
terminal::{self, EnterAlternateScreen, LeaveAlternateScreen},
QueueableCommand,
},
opener,
std::{
env,
io::{self, Write},
path::PathBuf,
process::Command,
},
};
/// description of a possible launch of an external program
/// A launchable can only be executed on end of life of broot.
#[derive(Debug)]
pub enum Launchable {
/// just print something on stdout on end of broot
Printer {
to_print: String,
},
/// print the tree on end of broot
TreePrinter {
tree: Box<Tree>,
skin: Box<StyleMap>,
ext_colors: ExtColorMap,
width: u16,
height: u16,
},
/// execute an external program
Program {
exe: String,
args: Vec<String>,
working_dir: Option<PathBuf>,
capture_mouse: bool,
},
/// open a path
SystemOpen {
path: PathBuf,
},
}
/// If a part starts with a '$', replace it by the environment variable of the same name.
/// This part is splitted too (because of https://github.com/Canop/broot/issues/114)
fn resolve_env_variables(parts: Vec<String>) -> Vec<String> {
let mut resolved = Vec::new();
for part in parts.into_iter() {
if let Some(var_name) = part.strip_prefix('$') {
if let Ok(val) = env::var(var_name) {
resolved.extend(val.split(' ').map(|s| s.to_string()));
continue;
}
}
resolved.push(part);
}
resolved
}
impl Launchable {
pub fn opener(path: PathBuf) -> Launchable {
Launchable::SystemOpen { path }
}
pub fn printer(to_print: String) -> Launchable {
Launchable::Printer { to_print }
}
pub fn tree_printer(
tree: &Tree,
screen: Screen,
style_map: StyleMap,
ext_colors: ExtColorMap,
) -> Launchable {
Launchable::TreePrinter {
tree: Box::new(tree.clone()),
skin: Box::new(style_map),
ext_colors,
width: screen.width,
height: (tree.lines.len() as u16).min(screen.height),
}
}
pub fn program(
parts: Vec<String>,
working_dir: Option<PathBuf>,
con: &AppContext,
) -> io::Result<Launchable> {
let mut parts = resolve_env_variables(parts).into_iter();
match parts.next() {
Some(exe) => Ok(Launchable::Program {
exe,
args: parts.collect(),
working_dir,
capture_mouse: con.capture_mouse,
}),
None => Err(io::Error::new(io::ErrorKind::Other, "Empty launch string")),
}
}
pub fn execute(
&self,
mut w: Option<&mut W>,
) -> Result<(), ProgramError> {
match self {
Launchable::Printer { to_print } => {
println!("{}", to_print);
Ok(())
}
Launchable::TreePrinter { tree, skin, ext_colors, width, height } => {
let dp = DisplayableTree::out_of_app(tree, skin, ext_colors, *width, *height);
dp.write_on(&mut std::io::stdout())
}
Launchable::Program {
working_dir,
exe,
args,
capture_mouse,
} => {
debug!("working_dir: {:?}", &working_dir);
// we restore the normal terminal in case the executable
// is a terminal application, and we'll switch back to
// broot's alternate terminal when we're back to broot
// (and this part of the code should be cleaned...)
if let Some(ref mut w) = &mut w {
w.queue(cursor::Show).unwrap();
w.queue(LeaveAlternateScreen).unwrap();
if *capture_mouse {
w.queue(DisableMouseCapture).unwrap();
}
terminal::disable_raw_mode().unwrap();
w.flush().unwrap();
}
let mut old_working_dir = None;
if let Some(working_dir) = working_dir {
old_working_dir = std::env::current_dir().ok();
std::env::set_current_dir(working_dir).unwrap();
}
let exec_res = Command::new(&exe)
.args(args.iter())
.spawn()
.and_then(|mut p| p.wait())
.map_err(|source| ProgramError::LaunchError {
program: exe.clone(),
source,
});
if let Some(ref mut w) = &mut w {
terminal::enable_raw_mode().unwrap();
if *capture_mouse {
w.queue(EnableMouseCapture).unwrap();
}
w.queue(EnterAlternateScreen).unwrap();
w.queue(cursor::Hide).unwrap();
w.flush().unwrap();
}
if let Some(old_working_dir) = old_working_dir {
std::env::set_current_dir(old_working_dir).unwrap();
}
exec_res?; // we trigger the error display after restoration
Ok(())
}
Launchable::SystemOpen { path } => {
opener::open(&path)?;
Ok(())
}
}
}
}
|