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script: Move navigation fetching to the ScriptThread
(#34919)
This allows reusing the asynchrnous fetch mechanism that we use for page resources and is likely a step toward removing the `FetchThread`. Benefits: - Reduces IPC traffic during navigation. Now instead of bouncing between the constellation and the `ScriptThread` responses are sent directly to the `ScriptThread`. - Allows cancelling loads after redirects, which was not possible before. There is the question of what to do when a redirect is cross-origin (#23037). This currently isn't handled properly as the `Constellation` sends data to the same `Pipeline` that initiated the load. This change doesn't fix this issue, but does make it more possible for the `ScriptThread` to shut down the pipeline and ask the `Constellation` to replace it with a new one. Signed-off-by: Martin Robinson <mrobinson@igalia.com>
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16 changed files with 420 additions and 460 deletions
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@ -17,7 +17,6 @@ use embedder_traits::{EmbedderMsg, MediaSessionEvent};
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use euclid::default::Size2D as UntypedSize2D;
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use euclid::Size2D;
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use ipc_channel::ipc::{IpcReceiver, IpcSender};
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use net_traits::request::RequestBuilder;
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use net_traits::storage_thread::StorageType;
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use net_traits::CoreResourceMsg;
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use serde::{Deserialize, Serialize};
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@ -128,9 +127,6 @@ pub enum ScriptMsg {
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ScheduleBroadcast(BroadcastChannelRouterId, BroadcastMsg),
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/// Forward a message to the embedder.
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ForwardToEmbedder(EmbedderMsg),
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/// Requests are sent to constellation and fetches are checked manually
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/// for cross-origin loads
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InitiateNavigateRequest(RequestBuilder, /* cancellation_chan */ IpcReceiver<()>),
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/// Broadcast a storage event to every same-origin pipeline.
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/// The strings are key, old value and new value.
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BroadcastStorageEvent(
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@ -271,7 +267,6 @@ impl fmt::Debug for ScriptMsg {
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NewBroadcastChannelNameInRouter(..) => "NewBroadcastChannelNameInRouter",
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ScheduleBroadcast(..) => "ScheduleBroadcast",
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ForwardToEmbedder(..) => "ForwardToEmbedder",
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InitiateNavigateRequest(..) => "InitiateNavigateRequest",
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BroadcastStorageEvent(..) => "BroadcastStorageEvent",
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ChangeRunningAnimationsState(..) => "ChangeRunningAnimationsState",
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CreateCanvasPaintThread(..) => "CreateCanvasPaintThread",
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