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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 https://mozilla.org/MPL/2.0/. */
//! Infrastructure to initiate network requests for images needed by layout. 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 layout holds on to them during asynchronous operations.
use std::sync::Arc;
use net_traits::image_cache::{ImageCache, PendingImageId};
use net_traits::request::{Destination, RequestBuilder as FetchRequestInit, RequestId};
use net_traits::{
FetchMetadata, FetchResponseListener, FetchResponseMsg, NetworkError, ResourceFetchTiming,
ResourceTimingType,
};
use servo_url::ServoUrl;
use crate::dom::bindings::refcounted::Trusted;
use crate::dom::bindings::reflector::DomGlobal;
use crate::dom::bindings::root::DomRoot;
use crate::dom::document::Document;
use crate::dom::globalscope::GlobalScope;
use crate::dom::node::{Node, NodeTraits};
use crate::dom::performanceresourcetiming::InitiatorType;
use crate::network_listener::{self, PreInvoke, ResourceTimingListener};
use crate::script_runtime::CanGc;
struct LayoutImageContext {
id: PendingImageId,
cache: Arc<dyn ImageCache>,
resource_timing: ResourceFetchTiming,
doc: Trusted<Document>,
url: ServoUrl,
}
impl FetchResponseListener for LayoutImageContext {
fn process_request_body(&mut self, _: RequestId) {}
fn process_request_eof(&mut self, _: RequestId) {}
fn process_response(
&mut self,
request_id: RequestId,
metadata: Result<FetchMetadata, NetworkError>,
) {
self.cache.notify_pending_response(
self.id,
FetchResponseMsg::ProcessResponse(request_id, metadata),
);
}
fn process_response_chunk(&mut self, request_id: RequestId, payload: Vec<u8>) {
self.cache.notify_pending_response(
self.id,
FetchResponseMsg::ProcessResponseChunk(request_id, payload),
);
}
fn process_response_eof(
&mut self,
request_id: RequestId,
response: Result<ResourceFetchTiming, NetworkError>,
) {
self.cache.notify_pending_response(
self.id,
FetchResponseMsg::ProcessResponseEOF(request_id, response),
);
}
fn resource_timing_mut(&mut self) -> &mut ResourceFetchTiming {
&mut self.resource_timing
}
fn resource_timing(&self) -> &ResourceFetchTiming {
&self.resource_timing
}
fn submit_resource_timing(&mut self) {
network_listener::submit_timing(self, CanGc::note())
}
}
impl ResourceTimingListener for LayoutImageContext {
fn resource_timing_information(&self) -> (InitiatorType, ServoUrl) {
(InitiatorType::Other, self.url.clone())
}
fn resource_timing_global(&self) -> DomRoot<GlobalScope> {
self.doc.root().global()
}
}
impl PreInvoke for LayoutImageContext {}
pub(crate) fn fetch_image_for_layout(
url: ServoUrl,
node: &Node,
id: PendingImageId,
cache: Arc<dyn ImageCache>,
) {
let document = node.owner_document();
let context = LayoutImageContext {
id,
cache,
resource_timing: ResourceFetchTiming::new(ResourceTimingType::Resource),
doc: Trusted::new(&document),
url: url.clone(),
};
let request = FetchRequestInit::new(
Some(document.webview_id()),
url,
document.global().get_referrer(),
)
.origin(document.origin().immutable().clone())
.destination(Destination::Image)
.pipeline_id(Some(document.global().pipeline_id()));
// Layout image loads do not delay the document load event.
document.fetch_background(request, context);
}
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