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// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
#[cfg(feature = "semver")]
use crate::semver_compat::semver_compat_string;
use crate::SingleInstanceCallback;
use tauri::{
plugin::{self, TauriPlugin},
AppHandle, Config, Manager, RunEvent, Runtime,
};
use zbus::{
blocking::{connection::Builder, Connection},
interface,
};
struct ConnectionHandle(Connection);
struct SingleInstanceDBus<R: Runtime> {
callback: Box<SingleInstanceCallback<R>>,
app_handle: AppHandle<R>,
}
#[interface(name = "org.SingleInstance.DBus")]
impl<R: Runtime> SingleInstanceDBus<R> {
fn execute_callback(&mut self, argv: Vec<String>, cwd: String) {
(self.callback)(&self.app_handle, argv, cwd);
}
}
#[cfg(feature = "semver")]
fn dbus_id(config: &Config, version: semver::Version) -> (String, bool) {
let mut override_id = crate::OVERRIDE_DBUS_ID.try_lock();
while override_id.is_err() {
override_id = crate::OVERRIDE_DBUS_ID.try_lock();
}
let override_id = override_id.unwrap();
if let Some(ovr_id) = override_id.as_ref() {
return (ovr_id.to_owned(), true);
}
let mut id = config.identifier.replace(['.', '-'], "_");
id.push('_');
id.push_str(semver_compat_string(version).as_str());
(id, false)
}
// Return a bool in order to indicate that the DBUS ID was set at runtime
#[cfg(not(feature = "semver"))]
fn dbus_id(config: &Config) -> (String, bool) {
let mut override_id = crate::OVERRIDE_DBUS_ID.try_lock();
while override_id.is_err() {
override_id = crate::OVERRIDE_DBUS_ID.try_lock();
}
let override_id = override_id.unwrap();
if let Some(ovr_id) = override_id.as_ref() {
return (ovr_id.to_owned(), true);
}
// Check whether a custom DBUS_ID is present at compile time.
let custom_id = std::option_env!("DBUS_ID");
match custom_id {
Some(id) => (id.to_string(), false),
None => (config.identifier.clone(), false),
}
}
fn dbus_path(config: &Config) -> String {
// Check whether a custom DBUS_ID is present at compile time.
let custom_id = std::option_env!("DBUS_ID");
match custom_id {
Some(id) => id.to_string().replace(['.', '-'], "_"),
None => config.identifier.replace(['.', '-'], "_"),
}
}
pub fn init<R: Runtime>(f: Box<SingleInstanceCallback<R>>) -> TauriPlugin<R> {
plugin::Builder::new("single-instance")
.setup(|app, _api| {
#[cfg(feature = "semver")]
let id = dbus_id(app.config(), app.package_info().version.clone());
#[cfg(not(feature = "semver"))]
let (id, is_id_custom) = dbus_id(app.config());
let single_instance_dbus = SingleInstanceDBus {
callback: f,
app_handle: app.clone(),
};
let path = dbus_path(app.config());
let dbus_path = format!("/{path}/SingleInstance");
let dbus_name = if is_id_custom {
id
} else {
format!("{id}.SingleInstance")
};
match Builder::session()
.unwrap()
.name(dbus_name.as_str())
.unwrap()
.replace_existing_names(false)
.allow_name_replacements(false)
.serve_at(dbus_path.as_str(), single_instance_dbus)
.unwrap()
.build()
{
Ok(connection) => {
app.manage(ConnectionHandle(connection));
}
Err(zbus::Error::NameTaken) => {
if let Ok(connection) = Connection::session() {
let _ = connection.call_method(
Some(dbus_name.as_str()),
dbus_path.as_str(),
Some("org.SingleInstance.DBus"),
"ExecuteCallback",
&(
std::env::args().collect::<Vec<String>>(),
std::env::current_dir()
.unwrap_or_default()
.to_str()
.unwrap_or_default(),
),
);
}
app.cleanup_before_exit();
std::process::exit(0);
}
_ => {}
}
Ok(())
})
.on_event(|app, event| {
if let RunEvent::Exit = event {
destroy(app);
}
})
.build()
}
pub fn destroy<R: Runtime, M: Manager<R>>(manager: &M) {
if let Some(connection) = manager.try_state::<ConnectionHandle>() {
#[cfg(feature = "semver")]
let id = dbus_id(
manager.config(),
manager.app_handle().package_info().version.clone(),
);
#[cfg(not(feature = "semver"))]
let (id, is_id_custom) = dbus_id(manager.config());
let dbus_name = if is_id_custom {
id.clone()
} else {
format!("{id}.SingleInstance",)
};
let _ = connection.0.release_name(dbus_name);
}
}
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