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140 lines
5 KiB
Rust
140 lines
5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use compositor_task::{CompositorEventListener, CompositorReceiver, Msg};
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use windowing::WindowEvent;
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use geom::scale_factor::ScaleFactor;
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use geom::size::TypedSize2D;
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use msg::constellation_msg::Msg as ConstellationMsg;
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use msg::constellation_msg::{ConstellationChan, WindowSizeData};
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use util::memory::MemoryProfilerChan;
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use util::memory;
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use util::time::TimeProfilerChan;
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use util::time;
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/// Starts the compositor, which listens for messages on the specified port.
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///
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/// This is the null compositor which doesn't draw anything to the screen.
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/// It's intended for headless testing.
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pub struct NullCompositor {
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/// The port on which we receive messages.
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pub port: Box<CompositorReceiver>,
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/// A channel to the constellation.
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constellation_chan: ConstellationChan,
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/// A channel to the time profiler.
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time_profiler_chan: TimeProfilerChan,
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/// A channel to the memory profiler.
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memory_profiler_chan: MemoryProfilerChan,
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}
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impl NullCompositor {
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fn new(port: Box<CompositorReceiver>,
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constellation_chan: ConstellationChan,
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time_profiler_chan: TimeProfilerChan,
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memory_profiler_chan: MemoryProfilerChan)
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-> NullCompositor {
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NullCompositor {
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port: port,
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constellation_chan: constellation_chan,
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time_profiler_chan: time_profiler_chan,
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memory_profiler_chan: memory_profiler_chan,
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}
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}
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pub fn create(port: Box<CompositorReceiver>,
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constellation_chan: ConstellationChan,
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time_profiler_chan: TimeProfilerChan,
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memory_profiler_chan: MemoryProfilerChan)
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-> NullCompositor {
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let compositor = NullCompositor::new(port,
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constellation_chan,
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time_profiler_chan,
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memory_profiler_chan);
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// Tell the constellation about the initial fake size.
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{
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let ConstellationChan(ref chan) = compositor.constellation_chan;
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chan.send(ConstellationMsg::ResizedWindow(WindowSizeData {
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initial_viewport: TypedSize2D(640_f32, 480_f32),
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visible_viewport: TypedSize2D(640_f32, 480_f32),
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device_pixel_ratio: ScaleFactor(1.0),
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})).unwrap();
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}
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compositor
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}
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}
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impl CompositorEventListener for NullCompositor {
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fn handle_event(&mut self, _: WindowEvent) -> bool {
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match self.port.recv_compositor_msg() {
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Msg::Exit(chan) => {
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debug!("shutting down the constellation");
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let ConstellationChan(ref con_chan) = self.constellation_chan;
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con_chan.send(ConstellationMsg::Exit).unwrap();
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chan.send(()).unwrap();
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}
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Msg::ShutdownComplete => {
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debug!("constellation completed shutdown");
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return false
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}
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Msg::GetGraphicsMetadata(chan) => {
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chan.send(None).unwrap();
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}
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Msg::SetFrameTree(_, response_chan, _) => {
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response_chan.send(()).unwrap();
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}
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Msg::ChangeLayerPipelineAndRemoveChildren(_, _, response_channel) => {
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response_channel.send(()).unwrap();
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}
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Msg::CreateRootLayerForPipeline(_, _, _, response_channel) => {
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response_channel.send(()).unwrap();
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}
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// Explicitly list ignored messages so that when we add a new one,
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// we'll notice and think about whether it needs a response, like
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// SetFrameTree.
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Msg::CreateOrUpdateBaseLayer(..) |
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Msg::CreateOrUpdateDescendantLayer(..) |
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Msg::SetLayerOrigin(..) |
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Msg::AssignPaintedBuffers(..) |
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Msg::ChangeReadyState(..) |
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Msg::ChangePaintState(..) |
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Msg::ScrollFragmentPoint(..) |
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Msg::LoadComplete |
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Msg::PaintMsgDiscarded(..) |
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Msg::ScrollTimeout(..) |
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Msg::ChangePageTitle(..) |
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Msg::ChangePageLoadData(..) |
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Msg::KeyEvent(..) |
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Msg::SetCursor(..) => {}
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Msg::PaintTaskExited(..) => {}
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}
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true
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}
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fn repaint_synchronously(&mut self) {}
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fn shutdown(&mut self) {
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// Drain compositor port, sometimes messages contain channels that are blocking
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// another task from finishing (i.e. SetIds)
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while self.port.try_recv_compositor_msg().is_some() {}
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self.time_profiler_chan.send(time::TimeProfilerMsg::Exit);
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self.memory_profiler_chan.send(memory::MemoryProfilerMsg::Exit);
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}
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fn pinch_zoom_level(&self) -> f32 {
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1.0
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}
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fn get_title_for_main_frame(&self) {}
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}
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