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Extract layout image request into separate file. Do not block the doc…
…ument load event.
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Original file line number | Diff line number | Diff line change |
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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/. */ | ||
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//! Infrastructure to initiate network requests for images needed by the layout | ||
//! thread. The script thread needs to be responsible for them because there's | ||
//! no guarantee that the responsible nodes will still exist in the future if the | ||
//! layout thread holds on to them during asynchronous operations. | ||
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use dom::bindings::reflector::DomObject; | ||
use dom::node::{Node, document_from_node}; | ||
use ipc_channel::ipc; | ||
use ipc_channel::router::ROUTER; | ||
use net_traits::{FetchResponseMsg, FetchResponseListener, FetchMetadata, NetworkError}; | ||
use net_traits::image_cache_thread::{ImageCacheThread, PendingImageId}; | ||
use net_traits::request::{Type as RequestType, RequestInit as FetchRequestInit}; | ||
use network_listener::{NetworkListener, PreInvoke}; | ||
use servo_url::ServoUrl; | ||
use std::sync::{Arc, Mutex}; | ||
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struct LayoutImageContext { | ||
id: PendingImageId, | ||
cache: ImageCacheThread, | ||
} | ||
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impl FetchResponseListener for LayoutImageContext { | ||
fn process_request_body(&mut self) {} | ||
fn process_request_eof(&mut self) {} | ||
fn process_response(&mut self, metadata: Result<FetchMetadata, NetworkError>) { | ||
self.cache.notify_pending_response( | ||
self.id, | ||
FetchResponseMsg::ProcessResponse(metadata)); | ||
} | ||
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fn process_response_chunk(&mut self, payload: Vec<u8>) { | ||
self.cache.notify_pending_response( | ||
self.id, | ||
FetchResponseMsg::ProcessResponseChunk(payload)); | ||
} | ||
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fn process_response_eof(&mut self, response: Result<(), NetworkError>) { | ||
self.cache.notify_pending_response(self.id, | ||
FetchResponseMsg::ProcessResponseEOF(response)); | ||
} | ||
} | ||
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impl PreInvoke for LayoutImageContext {} | ||
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pub fn fetch_image_for_layout(url: ServoUrl, | ||
node: &Node, | ||
id: PendingImageId, | ||
cache: ImageCacheThread) { | ||
let context = Arc::new(Mutex::new(LayoutImageContext { | ||
id: id, | ||
cache: cache, | ||
})); | ||
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let document = document_from_node(node); | ||
let window = document.window(); | ||
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let (action_sender, action_receiver) = ipc::channel().unwrap(); | ||
let listener = NetworkListener { | ||
context: context, | ||
task_source: window.networking_task_source(), | ||
wrapper: Some(window.get_runnable_wrapper()), | ||
}; | ||
ROUTER.add_route(action_receiver.to_opaque(), box move |message| { | ||
listener.notify_fetch(message.to().unwrap()); | ||
}); | ||
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let request = FetchRequestInit { | ||
url: url, | ||
origin: document.url().clone(), | ||
type_: RequestType::Image, | ||
pipeline_id: Some(document.global().pipeline_id()), | ||
.. FetchRequestInit::default() | ||
}; | ||
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// Layout image loads do not delay the document load event. | ||
document.mut_loader().fetch_async_background(request, action_sender); | ||
} |
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