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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
//! Application entry point, runs the event loop.
use crate::browser::Browser;
use crate::embedder::EmbedderCallbacks;
use crate::window_trait::WindowPortsMethods;
use crate::events_loop::EventsLoop;
use crate::{headed_window, headless_window};
use servo::compositing::windowing::WindowEvent;
use servo::config::opts::{self, parse_url_or_filename};
use servo::servo_config::pref;
use servo::servo_url::ServoUrl;
use servo::{BrowserId, Servo};
use std::cell::{Cell, RefCell};
use std::env;
use std::mem;
use std::rc::Rc;
pub struct App {
events_loop: Rc<RefCell<EventsLoop>>,
window: Rc<WindowPortsMethods>,
servo: RefCell<Servo<WindowPortsMethods>>,
browser: RefCell<Browser<WindowPortsMethods>>,
event_queue: RefCell<Vec<WindowEvent>>,
suspended: Cell<bool>,
}
impl App {
pub fn run() {
let events_loop = EventsLoop::new(opts::get().headless);
// Implements window methods, used by compositor.
let window = if opts::get().headless {
headless_window::Window::new(opts::get().initial_window_size)
} else {
headed_window::Window::new(opts::get().initial_window_size, events_loop.borrow().as_winit())
};
// Implements embedder methods, used by libservo and constellation.
let embedder = Box::new(EmbedderCallbacks::new(
events_loop.clone(),
window.gl(),
));
// Handle browser state.
let browser = Browser::new(window.clone());
let mut servo = Servo::new(embedder, window.clone());
let browser_id = BrowserId::new();
servo.handle_events(vec![WindowEvent::NewBrowser(get_default_url(), browser_id)]);
servo.setup_logging();
let app = App {
event_queue: RefCell::new(vec![]),
events_loop,
window: window,
browser: RefCell::new(browser),
servo: RefCell::new(servo),
suspended: Cell::new(false),
};
app.run_loop();
}
fn get_events(&self) -> Vec<WindowEvent> {
mem::replace(&mut *self.event_queue.borrow_mut(), Vec::new())
}
// This function decides whether the event should be handled during `run_forever`.
fn winit_event_to_servo_event(&self, event: glutin::Event) -> glutin::ControlFlow {
match event {
// App level events
glutin::Event::Suspended(suspended) => {
self.suspended.set(suspended);
if !suspended {
self.event_queue.borrow_mut().push(WindowEvent::Idle);
}
},
glutin::Event::Awakened => {
self.event_queue.borrow_mut().push(WindowEvent::Idle);
},
glutin::Event::DeviceEvent { .. } => {},
// Window level events
glutin::Event::WindowEvent {
window_id, event, ..
} => {
if Some(window_id) != self.window.id() {
warn!("Got an event from unknown window");
} else {
// Resize events need to be handled during run_forever
let cont = if let glutin::WindowEvent::Resized(_) = event {
glutin::ControlFlow::Continue
} else {
glutin::ControlFlow::Break
};
self.window.winit_event_to_servo_event(event);
return cont;
}
},
}
glutin::ControlFlow::Break
}
fn run_loop(self) {
loop {
if !self.window.is_animating() || self.suspended.get() {
// If there's no animations running then we block on the window event loop.
self.events_loop.borrow_mut().run_forever(|e| {
let cont = self.winit_event_to_servo_event(e);
if cont == glutin::ControlFlow::Continue {
// Note we need to be careful to make sure that any events
// that are handled during run_forever aren't re-entrant,
// since we are handling them while holding onto a mutable borrow
// of the events loop
self.handle_events();
}
cont
});
}
// Grab any other events that may have happened
self.events_loop.borrow_mut().poll_events(|e| {
self.winit_event_to_servo_event(e);
});
// If animations are running, we block on compositing
// (self.handle_events() ends up calling swap_buffers)
let stop = self.handle_events();
if stop {
break;
}
}
self.servo.into_inner().deinit()
}
fn handle_events(&self) -> bool {
let mut browser = self.browser.borrow_mut();
let mut servo = self.servo.borrow_mut();
let win_events = self.window.get_events();
// FIXME: this could be handled by Servo. We don't need
// a repaint_synchronously function exposed.
let need_resize = win_events.iter().any(|e| match *e {
WindowEvent::Resize => true,
_ => false,
});
let mut app_events = self.get_events();
app_events.extend(win_events);
browser.handle_window_events(app_events);
let mut servo_events = servo.get_events();
loop {
browser.handle_servo_events(servo_events);
servo.handle_events(browser.get_events());
if browser.shutdown_requested() {
return true;
}
servo_events = servo.get_events();
if servo_events.is_empty() {
break;
}
}
if need_resize {
servo.repaint_synchronously();
}
false
}
}
fn get_default_url() -> ServoUrl {
// If the url is not provided, we fallback to the homepage in prefs,
// or a blank page in case the homepage is not set either.
let cwd = env::current_dir().unwrap();
let cmdline_url = opts::get().url.clone();
let pref_url = {
let homepage_url = pref!(shell.homepage);
parse_url_or_filename(&cwd, &homepage_url).ok()
};
let blank_url = ServoUrl::parse("about:blank").ok();
cmdline_url.or(pref_url).or(blank_url).unwrap()
}
pub fn gl_version() -> glutin::GlRequest {
if opts::get().angle {
glutin::GlRequest::Specific(glutin::Api::OpenGlEs, (3, 0))
} else {
glutin::GlRequest::GlThenGles {
opengl_version: (3, 2),
opengles_version: (3, 0),
}
}
}
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