2016-06-30 03:56:12 +00:00
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// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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2016-05-25 03:55:51 +00:00
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//! Alacritty - The GPU Enhanced Terminal
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2016-10-14 23:38:15 +00:00
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#![allow(stable_features)] // lying about question_mark because 1.14.0 isn't released!
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2016-11-20 00:16:20 +00:00
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#[macro_use]
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extern crate alacritty;
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2016-06-06 23:54:15 +00:00
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2016-12-11 06:44:13 +00:00
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use std::error::Error;
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2016-12-11 07:32:12 +00:00
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use std::sync::Arc;
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2016-12-11 06:44:13 +00:00
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use std::rc::Rc;
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2016-06-28 02:46:24 +00:00
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2016-12-11 06:44:13 +00:00
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use alacritty::cli;
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2016-11-20 00:16:20 +00:00
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use alacritty::config::{self, Config};
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2016-12-11 07:32:12 +00:00
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use alacritty::display::Display;
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2016-11-20 00:16:20 +00:00
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use alacritty::event;
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2016-12-10 05:10:49 +00:00
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use alacritty::event_loop::EventLoop;
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2016-11-20 00:16:20 +00:00
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use alacritty::input;
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use alacritty::sync::FairMutex;
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2016-12-11 06:44:13 +00:00
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use alacritty::term::{Term};
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use alacritty::tty::{self, process_should_exit};
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2016-06-30 03:14:37 +00:00
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2016-06-10 03:39:40 +00:00
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fn main() {
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2016-06-30 16:04:06 +00:00
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// Load configuration
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2016-12-05 19:18:02 +00:00
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let config = match Config::load() {
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2016-12-05 00:27:20 +00:00
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// Error loading config
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2016-06-30 16:04:06 +00:00
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Err(err) => match err {
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// Use default config when not found
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config::Error::NotFound => {
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err_println!("Config file not found; using defaults");
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Config::default()
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},
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// If there's a problem with the config file, print an error
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// and exit.
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_ => die!("{}", err),
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},
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// Successfully loaded config from file
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Ok(config) => config
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};
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2016-12-05 19:18:02 +00:00
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// Load command line options
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2016-12-05 00:27:20 +00:00
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let options = cli::Options::load();
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2016-11-20 00:16:20 +00:00
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2016-12-10 19:27:53 +00:00
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// Run alacritty
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if let Err(err) = run(config, options) {
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die!("{}", err);
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}
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println!("Goodbye");
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2016-12-10 19:27:53 +00:00
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}
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/// Run Alacritty
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///
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2016-12-11 07:32:12 +00:00
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/// Creates a window, the terminal state, pty, I/O event loop, input processor,
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/// config change monitor, and runs the main display loop.
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fn run(config: Config, options: cli::Options) -> Result<(), Box<Error>> {
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// Create a display.
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//
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// The display manages a window and can draw the terminal
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let mut display = Display::new(&config, &options)?;
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// Create the terminal
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//
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// This object contains all of the state about what's being displayed. It's
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// wrapped in a clonable mutex since both the I/O loop and display need to
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// access it.
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let terminal = Arc::new(FairMutex::new(Term::new(display.size().to_owned())));
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// Create the pty
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//
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// The pty forks a process to run the shell on the slave side of the
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// pseudoterminal. A file descriptor for the master side is retained for
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// reading/writing to the shell.
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let pty = Rc::new(tty::new(display.size()));
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// When the display is resized, inform the kernel of changes to pty
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// dimensions.
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//
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// TODO: The Rc on pty is needed due to a borrowck error here. The borrow
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// checker says that `pty` is still borrowed when it is dropped at the end
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// of the `run` function.
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let pty_ref = pty.clone();
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display.set_resize_callback(move |size| {
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pty_ref.resize(size);
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2016-12-10 05:10:49 +00:00
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});
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2016-11-12 01:40:12 +00:00
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2016-12-11 06:44:13 +00:00
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// Create the pseudoterminal I/O loop
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//
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// pty I/O is ran on another thread as to not occupy cycles used by the
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// renderer and input processing. Note that access to the terminal state is
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// synchronized since the I/O loop updates the state, and the display
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// consumes it periodically.
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2016-09-24 23:11:50 +00:00
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let event_loop = EventLoop::new(
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2016-09-18 18:17:44 +00:00
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terminal.clone(),
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2016-12-11 06:44:13 +00:00
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display.notifier(),
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pty.reader(),
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2016-12-05 00:27:20 +00:00
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options.ref_test,
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2016-09-18 18:17:44 +00:00
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);
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2016-09-01 17:24:20 +00:00
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2016-12-11 07:32:12 +00:00
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// The event loop channel allows write requests from the event processor
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// to be sent to the loop and ultimately written to the pty.
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2016-09-24 23:11:50 +00:00
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let loop_tx = event_loop.channel();
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2016-09-01 17:24:20 +00:00
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// Event processor
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let mut processor = event::Processor::new(
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input::LoopNotifier(loop_tx),
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terminal.clone(),
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display.resize_channel(),
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2016-11-20 00:16:20 +00:00
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&config,
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2016-12-05 00:27:20 +00:00
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options.ref_test,
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2016-09-24 23:11:50 +00:00
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);
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2016-09-01 17:24:20 +00:00
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2016-12-11 07:32:12 +00:00
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// Create a config monitor when config was loaded from path
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//
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// The monitor watches the config file for changes and reloads it. Pending
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// config changes are processed in the main loop.
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let config_monitor = config.path()
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.map(|path| config::Monitor::new(path, display.notifier()));
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2016-10-27 17:05:04 +00:00
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2016-12-11 07:32:12 +00:00
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// Kick off the I/O thread
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let io_thread = event_loop.spawn(None);
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2016-10-27 17:05:04 +00:00
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2016-12-11 07:32:12 +00:00
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// Main display loop
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loop {
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// Process input and window events
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let wakeup_request = processor.process_events(display.window());
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2016-09-01 17:24:20 +00:00
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2016-12-04 23:48:12 +00:00
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// Handle config reloads
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2016-12-11 07:32:12 +00:00
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let config_updated = config_monitor.as_ref()
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.and_then(|monitor| monitor.pending_config())
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.map(|config| {
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display.update_config(&config);
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processor.update_config(&config);
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true
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}).unwrap_or(false);
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2016-10-27 17:05:04 +00:00
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2016-09-01 17:24:20 +00:00
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// Maybe draw the terminal
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2016-09-23 17:12:11 +00:00
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let terminal = terminal.lock();
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2016-12-11 07:32:12 +00:00
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if wakeup_request || config_updated {
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2016-12-04 21:13:44 +00:00
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display.draw(terminal, &config);
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2016-09-01 17:24:20 +00:00
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}
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2016-08-30 02:23:04 +00:00
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2016-12-04 23:48:12 +00:00
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// Begin shutdown if the flag was raised.
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2016-09-01 17:24:20 +00:00
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if process_should_exit() {
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break;
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}
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}
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2016-09-01 04:16:17 +00:00
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2016-12-11 07:32:12 +00:00
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// FIXME patch notify library to have a shutdown method
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2016-10-27 17:05:04 +00:00
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// config_reloader.join().ok();
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2016-12-11 07:32:12 +00:00
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// Wait for the I/O thread thread to finish
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let _ = io_thread.join();
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2016-12-11 06:44:13 +00:00
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Ok(())
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2016-08-30 02:23:04 +00:00
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}
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