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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 compositing::CompositorChan;
use layout::layout_task::LayoutTask;
use extra::url::Url;
use geom::size::Size2D;
use gfx::opts::Opts;
use gfx::render_task::{PaintPermissionGranted, PaintPermissionRevoked};
use gfx::render_task::{RenderChan, RenderTask};
use layout::util::OpaqueNode;
use script::layout_interface::LayoutChan;
use script::script_task::LoadMsg;
use script::script_task::{AttachLayoutMsg, NewLayoutInfo, ScriptTask, ScriptChan};
use script::script_task;
use servo_msg::constellation_msg::{ConstellationChan, Failure, PipelineId, SubpageId};
use servo_net::image_cache_task::ImageCacheTask;
use servo_net::resource_task::ResourceTask;
use servo_util::time::ProfilerChan;
/// A uniquely-identifiable pipeline of script task, layout task, and render task.
pub struct Pipeline {
id: PipelineId,
subpage_id: Option<SubpageId>,
script_chan: ScriptChan,
layout_chan: LayoutChan,
render_chan: RenderChan<OpaqueNode>,
layout_shutdown_port: Port<()>,
render_shutdown_port: Port<()>,
/// The most recently loaded url
url: Option<Url>,
}
/// The subset of the pipeline that is needed for layer composition.
#[deriving(Clone)]
pub struct CompositionPipeline {
id: PipelineId,
script_chan: ScriptChan,
render_chan: RenderChan<OpaqueNode>,
}
impl Pipeline {
/// Starts a render task, layout task, and script task. Returns the channels wrapped in a
/// struct.
pub fn with_script(id: PipelineId,
subpage_id: Option<SubpageId>,
constellation_chan: ConstellationChan,
compositor_chan: CompositorChan,
image_cache_task: ImageCacheTask,
profiler_chan: ProfilerChan,
opts: Opts,
script_pipeline: &Pipeline)
-> Pipeline {
let (layout_port, layout_chan) = LayoutChan::new();
let (render_port, render_chan) = RenderChan::new();
let (render_shutdown_port, render_shutdown_chan) = Chan::new();
let (layout_shutdown_port, layout_shutdown_chan) = Chan::new();
let failure = Failure {
pipeline_id: id,
subpage_id: subpage_id,
};
RenderTask::create(id,
render_port,
compositor_chan.clone(),
constellation_chan.clone(),
failure.clone(),
opts.clone(),
profiler_chan.clone(),
render_shutdown_chan);
LayoutTask::create(id,
layout_port,
layout_chan.clone(),
constellation_chan,
failure,
script_pipeline.script_chan.clone(),
render_chan.clone(),
image_cache_task.clone(),
opts.clone(),
profiler_chan,
layout_shutdown_chan);
let new_layout_info = NewLayoutInfo {
old_id: script_pipeline.id.clone(),
new_id: id,
layout_chan: layout_chan.clone(),
};
script_pipeline.script_chan.send(AttachLayoutMsg(new_layout_info));
Pipeline::new(id,
subpage_id,
script_pipeline.script_chan.clone(),
layout_chan,
render_chan,
layout_shutdown_port,
render_shutdown_port)
}
pub fn create(id: PipelineId,
subpage_id: Option<SubpageId>,
constellation_chan: ConstellationChan,
compositor_chan: CompositorChan,
image_cache_task: ImageCacheTask,
resource_task: ResourceTask,
profiler_chan: ProfilerChan,
window_size: Size2D<uint>,
opts: Opts)
-> Pipeline {
let (script_port, script_chan) = ScriptChan::new();
let (layout_port, layout_chan) = LayoutChan::new();
let (render_port, render_chan) = RenderChan::new();
let (render_shutdown_port, render_shutdown_chan) = Chan::new();
let (layout_shutdown_port, layout_shutdown_chan) = Chan::new();
let pipeline = Pipeline::new(id,
subpage_id,
script_chan.clone(),
layout_chan.clone(),
render_chan.clone(),
layout_shutdown_port,
render_shutdown_port);
let failure = Failure {
pipeline_id: id,
subpage_id: subpage_id,
};
ScriptTask::create(id,
compositor_chan.clone(),
layout_chan.clone(),
script_port,
script_chan.clone(),
constellation_chan.clone(),
failure.clone(),
resource_task,
image_cache_task.clone(),
window_size);
RenderTask::create(id,
render_port,
compositor_chan.clone(),
constellation_chan.clone(),
failure.clone(),
opts.clone(),
profiler_chan.clone(),
render_shutdown_chan);
LayoutTask::create(id,
layout_port,
layout_chan.clone(),
constellation_chan,
failure,
script_chan.clone(),
render_chan.clone(),
image_cache_task,
opts.clone(),
profiler_chan,
layout_shutdown_chan);
pipeline
}
pub fn new(id: PipelineId,
subpage_id: Option<SubpageId>,
script_chan: ScriptChan,
layout_chan: LayoutChan,
render_chan: RenderChan<OpaqueNode>,
layout_shutdown_port: Port<()>,
render_shutdown_port: Port<()>)
-> Pipeline {
Pipeline {
id: id,
subpage_id: subpage_id,
script_chan: script_chan,
layout_chan: layout_chan,
render_chan: render_chan,
layout_shutdown_port: layout_shutdown_port,
render_shutdown_port: render_shutdown_port,
url: None,
}
}
pub fn load(&mut self, url: Url) {
self.url = Some(url.clone());
self.script_chan.send(LoadMsg(self.id, url));
}
pub fn grant_paint_permission(&self) {
self.render_chan.try_send(PaintPermissionGranted);
}
pub fn revoke_paint_permission(&self) {
debug!("pipeline revoking render channel paint permission");
self.render_chan.try_send(PaintPermissionRevoked);
}
pub fn reload(&mut self) {
self.url.clone().map(|url| {
self.load(url);
});
}
pub fn exit(&self) {
// Script task handles shutting down layout, and layout handles shutting down the renderer.
// For now, if the script task has failed, we give up on clean shutdown.
if self.script_chan.try_send(script_task::ExitPipelineMsg(self.id)) {
// Wait until all slave tasks have terminated and run destructors
// NOTE: We don't wait for script task as we don't always own it
self.render_shutdown_port.recv_opt();
self.layout_shutdown_port.recv_opt();
}
}
pub fn to_sendable(&self) -> CompositionPipeline {
CompositionPipeline {
id: self.id.clone(),
script_chan: self.script_chan.clone(),
render_chan: self.render_chan.clone(),
}
}
}
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