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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 http://mozilla.org/MPL/2.0/. */
// Servo, the mighty web browser engine from the future.
//
// This is a very simple library that wires all of Servo's components
// together as type `Browser`, along with a generic client
// implementing the `WindowMethods` trait, to create a working web
// browser.
//
// The `Browser` type is responsible for configuring a
// `Constellation`, which does the heavy lifting of coordinating all
// of Servo's internal subsystems, including the `ScriptTask` and the
// `LayoutTask`, as well maintains the navigation context.
//
// The `Browser` is fed events from a generic type that implements the
// `WindowMethods` trait.
extern crate compositing;
extern crate devtools;
extern crate devtools_traits;
extern crate net;
extern crate net_traits;
extern crate msg;
extern crate profile;
extern crate profile_traits;
#[macro_use]
extern crate util;
extern crate script;
extern crate layout;
extern crate gfx;
extern crate libc;
extern crate webdriver_server;
use compositing::CompositorEventListener;
use compositing::windowing::WindowEvent;
use compositing::windowing::WindowMethods;
use compositing::{CompositorProxy, CompositorTask, Constellation};
use msg::constellation_msg::Msg as ConstellationMsg;
use msg::constellation_msg::ConstellationChan;
use script::dom::bindings::codegen::RegisterBindings;
use net::image_cache_task::new_image_cache_task;
use net::storage_task::StorageTaskFactory;
use net::resource_task::new_resource_task;
use net_traits::storage_task::StorageTask;
use gfx::font_cache_task::FontCacheTask;
use profile::mem as profile_mem;
use profile::time as profile_time;
use profile_traits::mem;
use profile_traits::time;
use util::opts;
use std::borrow::Borrow;
use std::rc::Rc;
use std::sync::mpsc::Sender;
pub struct Browser {
compositor: Box<CompositorEventListener + 'static>,
}
/// The in-process interface to Servo.
///
/// It does everything necessary to render the web, primarily
/// orchestrating the interaction between JavaScript, CSS layout,
/// rendering, and the client window.
///
/// Clients create a `Browser` for a given reference-counted type
/// implementing `WindowMethods`, which is the bridge to whatever
/// application Servo is embedded in. Clients then create an event
/// loop to pump messages between the embedding application and
/// various browser components.
impl Browser {
pub fn new<Window>(window: Option<Rc<Window>>) -> Browser
where Window: WindowMethods + 'static {
// Global configuration options, parsed from the command line.
let opts = opts::get();
script::init();
// Create the global vtables used by the (generated) DOM
// bindings to implement JS proxies.
RegisterBindings::RegisterProxyHandlers();
// Get both endpoints of a special channel for communication between
// the client window and the compositor. This channel is unique because
// messages to client may need to pump a platform-specific event loop
// to deliver the message.
let (compositor_proxy, compositor_receiver) =
WindowMethods::create_compositor_channel(&window);
let supports_clipboard = match window {
Some(ref win_rc) => {
let win: &Window = win_rc.borrow();
win.supports_clipboard()
}
None => false
};
let time_profiler_chan = profile_time::Profiler::create(opts.time_profiler_period);
let mem_profiler_chan = profile_mem::Profiler::create(opts.mem_profiler_period);
let devtools_chan = opts.devtools_port.map(|port| {
devtools::start_server(port)
});
// Create the constellation, which maintains the engine
// pipelines, including the script and layout threads, as well
// as the navigation context.
let constellation_chan = create_constellation(opts.clone(),
compositor_proxy.clone_compositor_proxy(),
time_profiler_chan.clone(),
devtools_chan,
mem_profiler_chan.clone(),
supports_clipboard);
if let Some(port) = opts.webdriver_port {
webdriver_server::start_server(port, constellation_chan.clone());
};
// The compositor coordinates with the client window to create the final
// rendered page and display it somewhere.
let compositor = CompositorTask::create(window,
compositor_proxy,
compositor_receiver,
constellation_chan.clone(),
time_profiler_chan,
mem_profiler_chan);
Browser {
compositor: compositor,
}
}
pub fn handle_events(&mut self, events: Vec<WindowEvent>) -> bool {
self.compositor.handle_events(events)
}
pub fn repaint_synchronously(&mut self) {
self.compositor.repaint_synchronously()
}
pub fn pinch_zoom_level(&self) -> f32 {
self.compositor.pinch_zoom_level()
}
pub fn get_title_for_main_frame(&self) {
self.compositor.get_title_for_main_frame()
}
pub fn shutdown(mut self) {
self.compositor.shutdown();
}
}
fn create_constellation(opts: opts::Opts,
compositor_proxy: Box<CompositorProxy+Send>,
time_profiler_chan: time::ProfilerChan,
devtools_chan: Option<Sender<devtools_traits::DevtoolsControlMsg>>,
mem_profiler_chan: mem::ProfilerChan,
supports_clipboard: bool) -> ConstellationChan {
let resource_task = new_resource_task(opts.user_agent.clone(), devtools_chan.clone());
let image_cache_task = new_image_cache_task(resource_task.clone());
let font_cache_task = FontCacheTask::new(resource_task.clone());
let storage_task: StorageTask = StorageTaskFactory::new();
let constellation_chan = Constellation::<layout::layout_task::LayoutTask,
script::script_task::ScriptTask>::start(
compositor_proxy,
resource_task,
image_cache_task,
font_cache_task,
time_profiler_chan,
mem_profiler_chan,
devtools_chan,
storage_task,
supports_clipboard);
// Send the URL command to the constellation.
match opts.url {
Some(url) => {
let ConstellationChan(ref chan) = constellation_chan;
chan.send(ConstellationMsg::InitLoadUrl(url.clone())).unwrap();
},
None => ()
};
constellation_chan
}
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