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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/. */
use CompositorMsg as ConstellationMsg;
use compositor_thread::{CompositorEventListener, CompositorReceiver};
use compositor_thread::{InitialCompositorState, Msg};
use euclid::scale_factor::ScaleFactor;
use euclid::{Point2D, Size2D};
use msg::constellation_msg::AnimationState;
use msg::constellation_msg::WindowSizeData;
use profile_traits::mem;
use profile_traits::time;
use std::sync::mpsc::Sender;
use util::opts;
use windowing::WindowEvent;
/// Starts the compositor, which listens for messages on the specified port.
///
/// This is the null compositor which doesn't draw anything to the screen.
/// It's intended for headless testing.
pub struct NullCompositor {
/// The port on which we receive messages.
pub port: Box<CompositorReceiver>,
/// A channel to the constellation.
constellation_chan: Sender<ConstellationMsg>,
/// A channel to the time profiler.
time_profiler_chan: time::ProfilerChan,
/// A channel to the memory profiler.
mem_profiler_chan: mem::ProfilerChan,
}
impl NullCompositor {
fn new(state: InitialCompositorState) -> NullCompositor {
NullCompositor {
port: state.receiver,
constellation_chan: state.constellation_chan,
time_profiler_chan: state.time_profiler_chan,
mem_profiler_chan: state.mem_profiler_chan,
}
}
pub fn create(state: InitialCompositorState) -> NullCompositor {
let compositor = NullCompositor::new(state);
// Tell the constellation about the initial fake size.
{
compositor.constellation_chan.send(ConstellationMsg::ResizedWindow(WindowSizeData {
initial_viewport: Size2D::typed(800_f32, 600_f32),
visible_viewport: Size2D::typed(800_f32, 600_f32),
device_pixel_ratio:
ScaleFactor::new(opts::get().device_pixels_per_px.unwrap_or(1.0)),
})).unwrap();
}
compositor
}
}
impl CompositorEventListener for NullCompositor {
fn handle_events(&mut self, _: Vec<WindowEvent>) -> bool {
match self.port.recv_compositor_msg() {
Msg::Exit(chan) => {
debug!("shutting down the constellation");
self.constellation_chan.send(ConstellationMsg::Exit).unwrap();
chan.send(()).unwrap();
}
Msg::ShutdownComplete => {
debug!("constellation completed shutdown");
// Drain compositor port, sometimes messages contain channels that are blocking
// another thread from finishing (i.e. SetIds)
while self.port.try_recv_compositor_msg().is_some() {}
self.time_profiler_chan.send(time::ProfilerMsg::Exit);
self.mem_profiler_chan.send(mem::ProfilerMsg::Exit);
return false
}
Msg::GetNativeDisplay(chan) => {
chan.send(None).unwrap();
}
Msg::SetFrameTree(_, response_chan, _) => {
response_chan.send(()).unwrap();
}
Msg::GetClientWindow(send) => {
let rect = (Size2D::zero(), Point2D::zero());
send.send(rect).unwrap();
}
Msg::ChangeRunningAnimationsState(pipeline_id, animation_state) => {
match animation_state {
AnimationState::AnimationsPresent |
AnimationState::NoAnimationsPresent |
AnimationState::NoAnimationCallbacksPresent => {}
AnimationState::AnimationCallbacksPresent => {
let msg = ConstellationMsg::TickAnimation(pipeline_id);
self.constellation_chan.send(msg).unwrap()
}
}
}
// Explicitly list ignored messages so that when we add a new one,
// we'll notice and think about whether it needs a response, like
// SetFrameTree.
Msg::InitializeLayersForPipeline(..) |
Msg::AssignPaintedBuffers(..) |
Msg::ScrollFragmentPoint(..) |
Msg::Status(..) |
Msg::LoadStart(..) |
Msg::LoadComplete(..) |
Msg::ScrollTimeout(..) |
Msg::RecompositeAfterScroll |
Msg::ChangePageTitle(..) |
Msg::ChangePageUrl(..) |
Msg::KeyEvent(..) |
Msg::TouchEventProcessed(..) |
Msg::SetCursor(..) |
Msg::ViewportConstrained(..) => {}
Msg::CreatePng(..) |
Msg::PaintThreadExited(..) |
Msg::MoveTo(..) |
Msg::ResizeTo(..) |
Msg::IsReadyToSaveImageReply(..) => {}
Msg::NewFavicon(..) => {}
Msg::HeadParsed => {}
Msg::ReturnUnusedNativeSurfaces(..) => {}
Msg::CollectMemoryReports(..) => {}
Msg::PipelineExited(..) => {}
}
true
}
fn repaint_synchronously(&mut self) {}
fn pinch_zoom_level(&self) -> f32 {
1.0
}
fn title_for_main_frame(&self) {}
}
|
