| // Copyright 2016 Joe Wilm, The Alacritty Project Contributors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //! Alacritty - The GPU Enhanced Terminal |
| #![deny(clippy::all, clippy::if_not_else, clippy::enum_glob_use, clippy::wrong_pub_self_convention)] |
| #![cfg_attr(feature = "nightly", feature(core_intrinsics))] |
| #![cfg_attr(all(test, feature = "bench"), feature(test))] |
| |
| // With the default subsystem, 'console', windows creates an additional console |
| // window for the program. |
| // This is silently ignored on non-windows systems. |
| // See https://msdn.microsoft.com/en-us/library/4cc7ya5b.aspx for more details. |
| #![windows_subsystem = "windows"] |
| |
| #[macro_use] |
| extern crate alacritty; |
| |
| #[macro_use] |
| extern crate log; |
| #[cfg(target_os = "macos")] |
| extern crate dirs; |
| |
| use std::error::Error; |
| use std::sync::Arc; |
| |
| #[cfg(target_os = "macos")] |
| use std::env; |
| |
| #[cfg(not(windows))] |
| use std::os::unix::io::AsRawFd; |
| |
| #[cfg(windows)] |
| extern crate winapi; |
| #[cfg(windows)] |
| use winapi::um::wincon::{AttachConsole, FreeConsole, ATTACH_PARENT_PROCESS}; |
| |
| use alacritty::cli; |
| use alacritty::config::{self, Config, Error as ConfigError}; |
| use alacritty::display::Display; |
| use alacritty::event; |
| use alacritty::event_loop::{self, EventLoop, Msg}; |
| #[cfg(target_os = "macos")] |
| use alacritty::locale; |
| use alacritty::logging::{self, LoggerProxy}; |
| use alacritty::sync::FairMutex; |
| use alacritty::term::Term; |
| use alacritty::tty::{self, process_should_exit}; |
| use alacritty::util::fmt::Red; |
| |
| fn main() { |
| // When linked with the windows subsystem windows won't automatically attach |
| // to the console of the parent process, so we do it explicitly. This fails |
| // silently if the parent has no console. |
| #[cfg(windows)] |
| unsafe { AttachConsole(ATTACH_PARENT_PROCESS); } |
| |
| // Load command line options |
| let options = cli::Options::load(); |
| |
| // Initialize the logger as soon as possible as to capture output from other subsystems |
| let logger_proxy = logging::initialize(&options).expect("Unable to initialize logger"); |
| |
| // Load configuration file |
| let config = load_config(&options).update_dynamic_title(&options); |
| |
| // Switch to home directory |
| #[cfg(target_os = "macos")] |
| env::set_current_dir(dirs::home_dir().unwrap()).unwrap(); |
| // Set locale |
| #[cfg(target_os = "macos")] |
| locale::set_locale_environment(); |
| |
| // Run alacritty |
| if let Err(err) = run(config, &options, logger_proxy) { |
| die!("Alacritty encountered an unrecoverable error:\n\n\t{}\n", Red(err)); |
| } |
| } |
| |
| /// Load configuration |
| /// |
| /// If a configuration file is given as a command line argument we don't |
| /// generate a default file. If an empty configuration file is given, i.e. |
| /// /dev/null, we load the compiled-in defaults.) |
| fn load_config(options: &cli::Options) -> Config { |
| let config_path = options.config_path() |
| .or_else(Config::installed_config) |
| .unwrap_or_else(|| { |
| Config::write_defaults() |
| .unwrap_or_else(|err| die!("Write defaults config failure: {}", err)) |
| }); |
| |
| Config::load_from(&*config_path).unwrap_or_else(|err| { |
| match err { |
| ConfigError::Empty => info!("Config file {:?} is empty; Loading default", config_path), |
| _ => error!("Error: {}; Loading default config", err), |
| } |
| |
| Config::default() |
| }) |
| } |
| |
| /// Run Alacritty |
| /// |
| /// Creates a window, the terminal state, pty, I/O event loop, input processor, |
| /// config change monitor, and runs the main display loop. |
| fn run( |
| mut config: Config, |
| options: &cli::Options, |
| mut logger_proxy: LoggerProxy, |
| ) -> Result<(), Box<dyn Error>> { |
| info!("Welcome to Alacritty."); |
| if let Some(config_path) = config.path() { |
| info!("Configuration loaded from {}", config_path.display()); |
| }; |
| |
| // Set environment variables |
| tty::setup_env(&config); |
| |
| // Create a display. |
| // |
| // The display manages a window and can draw the terminal |
| let mut display = Display::new(&config, options, logger_proxy.clone())?; |
| |
| info!( |
| "PTY Dimensions: {:?} x {:?}", |
| display.size().lines(), |
| display.size().cols() |
| ); |
| |
| // Create the terminal |
| // |
| // This object contains all of the state about what's being displayed. It's |
| // wrapped in a clonable mutex since both the I/O loop and display need to |
| // access it. |
| let mut terminal = Term::new(&config, display.size().to_owned()); |
| terminal.set_logger_proxy(logger_proxy.clone()); |
| let terminal = Arc::new(FairMutex::new(terminal)); |
| |
| // Find the window ID for setting $WINDOWID |
| let window_id = display.get_window_id(); |
| |
| // Create the pty |
| // |
| // The pty forks a process to run the shell on the slave side of the |
| // pseudoterminal. A file descriptor for the master side is retained for |
| // reading/writing to the shell. |
| let pty = tty::new(&config, options, &display.size(), window_id); |
| |
| // Get a reference to something that we can resize |
| // |
| // This exists because rust doesn't know the interface is thread-safe |
| // and we need to be able to resize the PTY from the main thread while the IO |
| // thread owns the EventedRW object. |
| #[cfg(windows)] |
| let resize_handle = unsafe { &mut *pty.winpty.get() }; |
| #[cfg(not(windows))] |
| let resize_handle = &mut pty.fd.as_raw_fd(); |
| |
| // Create the pseudoterminal I/O loop |
| // |
| // pty I/O is ran on another thread as to not occupy cycles used by the |
| // renderer and input processing. Note that access to the terminal state is |
| // synchronized since the I/O loop updates the state, and the display |
| // consumes it periodically. |
| let event_loop = EventLoop::new( |
| Arc::clone(&terminal), |
| display.notifier(), |
| pty, |
| options.ref_test, |
| ); |
| |
| // The event loop channel allows write requests from the event processor |
| // to be sent to the loop and ultimately written to the pty. |
| let loop_tx = event_loop.channel(); |
| |
| // Event processor |
| // |
| // Need the Rc<RefCell<_>> here since a ref is shared in the resize callback |
| let mut processor = event::Processor::new( |
| event_loop::Notifier(event_loop.channel()), |
| display.resize_channel(), |
| options, |
| &config, |
| options.ref_test, |
| display.size().to_owned(), |
| ); |
| |
| // Create a config monitor when config was loaded from path |
| // |
| // The monitor watches the config file for changes and reloads it. Pending |
| // config changes are processed in the main loop. |
| let config_monitor = match (options.live_config_reload, config.live_config_reload()) { |
| // Start monitor if CLI flag says yes |
| (Some(true), _) | |
| // Or if no CLI flag was passed and the config says yes |
| (None, true) => config.path() |
| .map(|path| config::Monitor::new(path, display.notifier())), |
| // Otherwise, don't start the monitor |
| _ => None, |
| }; |
| |
| // Kick off the I/O thread |
| let _io_thread = event_loop.spawn(None); |
| |
| info!("Initialisation complete"); |
| |
| // Main display loop |
| loop { |
| // Process input and window events |
| let mut terminal_lock = processor.process_events(&terminal, display.window()); |
| |
| // Handle config reloads |
| if let Some(new_config) = config_monitor |
| .as_ref() |
| .and_then(|monitor| monitor.pending_config()) |
| { |
| config = new_config.update_dynamic_title(options); |
| display.update_config(&config); |
| processor.update_config(&config); |
| terminal_lock.update_config(&config); |
| terminal_lock.dirty = true; |
| } |
| |
| // Maybe draw the terminal |
| if terminal_lock.needs_draw() { |
| // Try to update the position of the input method editor |
| #[cfg(not(windows))] |
| display.update_ime_position(&terminal_lock); |
| |
| // Handle pending resize events |
| // |
| // The second argument is a list of types that want to be notified |
| // of display size changes. |
| display.handle_resize(&mut terminal_lock, &config, &mut [resize_handle, &mut processor]); |
| |
| drop(terminal_lock); |
| |
| // Draw the current state of the terminal |
| display.draw(&terminal, &config); |
| } |
| |
| // Begin shutdown if the flag was raised. |
| if process_should_exit() { |
| break; |
| } |
| } |
| |
| loop_tx |
| .send(Msg::Shutdown) |
| .expect("Error sending shutdown to event loop"); |
| |
| // FIXME patch notify library to have a shutdown method |
| // config_reloader.join().ok(); |
| |
| // Without explicitly detaching the console cmd won't redraw it's prompt |
| #[cfg(windows)] |
| unsafe { FreeConsole(); } |
| |
| info!("Goodbye."); |
| |
| if !options.persistent_logging && !config.persistent_logging() { |
| logger_proxy.delete_log(); |
| } |
| |
| Ok(()) |
| } |