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script: Split Pipeline::create into chrome process and content

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process parts.

This will make it easier to adapt to IPC.

The trickiest part here was to make script tasks spawn new layout tasks
directly instead of having the pipeline do it for them. The latter
approach will not work in multiprocess mode, because layout and script
must run in the same address space and the pipeline cannot inject tasks
into another process.
This commit is contained in:
Patrick Walton 2015-07-13 19:59:13 -07:00
parent 64751b8eef
commit e5b1ec4078
12 changed files with 316 additions and 149 deletions
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254
components/compositing/pipeline.rs
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@ -3,8 +3,8 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use CompositorProxy;
use layout_traits::{LayoutControlMsg, LayoutTaskFactory, LayoutControlChan};
use script_traits::{ScriptControlChan, ScriptTaskFactory};
use layout_traits::{LayoutTaskFactory, LayoutControlChan};
use script_traits::{LayoutControlMsg, ScriptControlChan, ScriptTaskFactory};
use script_traits::{NewLayoutInfo, ConstellationControlMsg};
use compositor_task;
@ -14,17 +14,19 @@ use euclid::scale_factor::ScaleFactor;
use gfx::paint_task::Msg as PaintMsg;
use gfx::paint_task::{PaintChan, PaintTask};
use gfx::font_cache_task::FontCacheTask;
use ipc_channel::ipc;
use ipc_channel::ipc::{self, IpcReceiver};
use layers::geometry::DevicePixel;
use msg::compositor_msg::ScriptListener;
use msg::constellation_msg::{ConstellationChan, Failure, FrameId, PipelineId, SubpageId};
use msg::constellation_msg::{LoadData, WindowSizeData, PipelineExitType, MozBrowserEvent};
use profile_traits::mem;
use profile_traits::mem as profile_mem;
use profile_traits::time;
use net_traits::ResourceTask;
use net_traits::image_cache_task::ImageCacheTask;
use net_traits::storage_task::StorageTask;
use std::sync::mpsc::{Receiver, channel};
use std::any::Any;
use std::mem;
use std::sync::mpsc::{Receiver, Sender, channel};
use std::thread;
use url::Url;
use util::geometry::{PagePx, ViewportPx};
@ -74,118 +76,85 @@ impl Pipeline {
resource_task: ResourceTask,
storage_task: StorageTask,
time_profiler_chan: time::ProfilerChan,
mem_profiler_chan: mem::ProfilerChan,
mem_profiler_chan: profile_mem::ProfilerChan,
window_rect: Option<TypedRect<PagePx, f32>>,
script_chan: Option<ScriptControlChan>,
load_data: LoadData,
device_pixel_ratio: ScaleFactor<ViewportPx, DevicePixel, f32>)
-> Pipeline
-> (Pipeline, PipelineContent)
where LTF: LayoutTaskFactory, STF:ScriptTaskFactory {
let layout_pair = ScriptTaskFactory::create_layout_channel(None::<&mut STF>);
let (paint_port, paint_chan) = PaintChan::new();
let (paint_shutdown_chan, paint_shutdown_port) = channel();
let (layout_shutdown_chan, layout_shutdown_port) = channel();
let (pipeline_chan, pipeline_port) = ipc::channel().unwrap();
let mut pipeline_port = Some(pipeline_port);
let failure = Failure {
pipeline_id: id,
parent_info: parent_info,
};
let script_chan = match script_chan {
None => {
let (script_chan, script_port) = channel();
let (script_to_compositor_chan, script_to_compositor_port) =
ipc::channel().unwrap();
let window_size = window_rect.map(|rect| {
WindowSizeData {
visible_viewport: rect.size,
initial_viewport: rect.size * ScaleFactor::new(1.0),
device_pixel_ratio: device_pixel_ratio,
}
});
let compositor_proxy_for_script_listener_thread =
compositor_proxy.clone_compositor_proxy();
thread::spawn(move || {
compositor_task::run_script_listener_thread(
compositor_proxy_for_script_listener_thread,
script_to_compositor_port)
});
ScriptTaskFactory::create(None::<&mut STF>,
id,
parent_info,
ScriptListener::new(script_to_compositor_chan),
&layout_pair,
ScriptControlChan(script_chan.clone()),
script_port,
constellation_chan.clone(),
failure.clone(),
resource_task,
storage_task.clone(),
image_cache_task.clone(),
devtools_chan,
window_size,
load_data.clone());
ScriptControlChan(script_chan)
let window_size = window_rect.map(|rect| {
WindowSizeData {
visible_viewport: rect.size,
initial_viewport: rect.size * ScaleFactor::new(1.0),
device_pixel_ratio: device_pixel_ratio,
}
Some(script_chan) => {
let (containing_pipeline_id, subpage_id) =
parent_info.expect("script_pipeline != None but subpage_id == None");
let new_layout_info = NewLayoutInfo {
containing_pipeline_id: containing_pipeline_id,
new_pipeline_id: id,
subpage_id: subpage_id,
layout_chan: ScriptTaskFactory::clone_layout_channel(None::<&mut STF>,
&layout_pair),
load_data: load_data.clone(),
};
});
let ScriptControlChan(ref chan) = script_chan;
chan.send(ConstellationControlMsg::AttachLayout(new_layout_info)).unwrap();
script_chan.clone()
}
if let Some(ref script_chan) = script_chan {
let (containing_pipeline_id, subpage_id) =
parent_info.expect("script_pipeline != None but subpage_id == None");
let new_layout_info = NewLayoutInfo {
containing_pipeline_id: containing_pipeline_id,
new_pipeline_id: id,
subpage_id: subpage_id,
load_data: load_data.clone(),
paint_chan: box() (paint_chan.clone()) as Box<Any + Send>,
failure: failure,
pipeline_port: mem::replace(&mut pipeline_port, None).unwrap(),
layout_shutdown_chan: layout_shutdown_chan.clone(),
};
script_chan.0.send(ConstellationControlMsg::AttachLayout(new_layout_info)).unwrap();
}
let (script_chan, script_port) = channel();
let pipeline = Pipeline::new(id,
parent_info,
ScriptControlChan(script_chan.clone()),
LayoutControlChan(pipeline_chan),
paint_chan.clone(),
layout_shutdown_port,
paint_shutdown_port,
load_data.url.clone(),
window_rect);
let pipeline_content = PipelineContent {
id: id,
parent_info: parent_info,
constellation_chan: constellation_chan,
compositor_proxy: compositor_proxy,
devtools_chan: devtools_chan,
image_cache_task: image_cache_task,
font_cache_task: font_cache_task,
resource_task: resource_task,
storage_task: storage_task,
time_profiler_chan: time_profiler_chan,
mem_profiler_chan: mem_profiler_chan,
window_size: window_size,
script_chan: script_chan,
load_data: load_data,
failure: failure,
script_port: script_port,
paint_chan: paint_chan,
paint_port: Some(paint_port),
pipeline_port: pipeline_port,
paint_shutdown_chan: paint_shutdown_chan,
layout_shutdown_chan: layout_shutdown_chan,
};
PaintTask::create(id,
load_data.url.clone(),
paint_chan.clone(),
paint_port,
compositor_proxy,
constellation_chan.clone(),
font_cache_task.clone(),
failure.clone(),
time_profiler_chan.clone(),
mem_profiler_chan.clone(),
paint_shutdown_chan);
LayoutTaskFactory::create(None::<&mut LTF>,
id,
load_data.url.clone(),
parent_info.is_some(),
layout_pair,
pipeline_port,
constellation_chan,
failure,
script_chan.clone(),
paint_chan.clone(),
image_cache_task,
font_cache_task,
time_profiler_chan,
mem_profiler_chan,
layout_shutdown_chan);
Pipeline::new(id,
parent_info,
script_chan,
LayoutControlChan(pipeline_chan),
paint_chan,
layout_shutdown_port,
paint_shutdown_port,
load_data.url,
window_rect)
(pipeline, pipeline_content)
}
pub fn new(id: PipelineId,
@ -289,3 +258,92 @@ impl Pipeline {
script_channel.send(event).unwrap();
}
}
pub struct PipelineContent {
id: PipelineId,
parent_info: Option<(PipelineId, SubpageId)>,
constellation_chan: ConstellationChan,
compositor_proxy: Box<CompositorProxy + Send + 'static>,
devtools_chan: Option<DevtoolsControlChan>,
image_cache_task: ImageCacheTask,
font_cache_task: FontCacheTask,
resource_task: ResourceTask,
storage_task: StorageTask,
time_profiler_chan: time::ProfilerChan,
mem_profiler_chan: profile_mem::ProfilerChan,
window_size: Option<WindowSizeData>,
script_chan: Sender<ConstellationControlMsg>,
load_data: LoadData,
failure: Failure,
script_port: Receiver<ConstellationControlMsg>,
paint_chan: PaintChan,
paint_port: Option<Receiver<PaintMsg>>,
paint_shutdown_chan: Sender<()>,
pipeline_port: Option<IpcReceiver<LayoutControlMsg>>,
layout_shutdown_chan: Sender<()>,
}
impl PipelineContent {
pub fn start_all<LTF,STF>(mut self) where LTF: LayoutTaskFactory, STF: ScriptTaskFactory {
let layout_pair = ScriptTaskFactory::create_layout_channel(None::<&mut STF>);
let (script_to_compositor_chan, script_to_compositor_port) = ipc::channel().unwrap();
self.start_paint_task();
let compositor_proxy_for_script_listener_thread =
self.compositor_proxy.clone_compositor_proxy();
thread::spawn(move || {
compositor_task::run_script_listener_thread(
compositor_proxy_for_script_listener_thread,
script_to_compositor_port)
});
ScriptTaskFactory::create(None::<&mut STF>,
self.id,
self.parent_info,
ScriptListener::new(script_to_compositor_chan),
&layout_pair,
ScriptControlChan(self.script_chan.clone()),
self.script_port,
self.constellation_chan.clone(),
self.failure.clone(),
self.resource_task,
self.storage_task.clone(),
self.image_cache_task.clone(),
self.devtools_chan,
self.window_size,
self.load_data.clone());
LayoutTaskFactory::create(None::<&mut LTF>,
self.id,
self.load_data.url.clone(),
self.parent_info.is_some(),
layout_pair,
self.pipeline_port.unwrap(),
self.constellation_chan,
self.failure,
ScriptControlChan(self.script_chan.clone()),
self.paint_chan.clone(),
self.image_cache_task,
self.font_cache_task,
self.time_profiler_chan,
self.mem_profiler_chan,
self.layout_shutdown_chan);
}
pub fn start_paint_task(&mut self) {
PaintTask::create(self.id,
self.load_data.url.clone(),
self.paint_chan.clone(),
mem::replace(&mut self.paint_port, None).unwrap(),
self.compositor_proxy.clone_compositor_proxy(),
self.constellation_chan.clone(),
self.font_cache_task.clone(),
self.failure.clone(),
self.time_profiler_chan.clone(),
self.mem_profiler_chan.clone(),
self.paint_shutdown_chan.clone());
}
}