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EmbedderMsg: port reply channels to GenericChannel (#39018)

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This change ports all `EmbedderMsg` reply channels that don't use the
`ROUTER` to GenericChannel.
The remaining reply channels that use the router are blocked until
#38973 is merged.
This is a breaking change in the API between libservo and embedders.

Future work: A lot of the reply channels in this PR look like they
conceptually should be oneshot ipc channels. It might make sense to
provide a `OneshotGenericChannel` abstraction that encodes this.

Testing: No functional changes - covered by existing tests. None of the
channels changed here uses the Router
Part of #38912

---------

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
This commit is contained in:
Jonathan Schwender 2025-08-29 14:44:21 +02:00 • committed by GitHub
parent 89e1357c75
commit 66d9f957e6
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20 changed files with 107 additions and 95 deletions
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4
components/script/dom/document_event_handler.rs
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@ -9,6 +9,7 @@ use std::mem;
use std::rc::Rc;
use std::time::{Duration, Instant};
use base::generic_channel;
use constellation_traits::ScriptToConstellationMessage;
use embedder_traits::{
Cursor, EditingActionEvent, EmbedderMsg, GamepadEvent as EmbedderGamepadEvent,
@ -689,7 +690,8 @@ impl DocumentEventHandler {
// Step 4. If result is true, then show the UA context menu
if result {
let (sender, receiver) = ipc::channel().expect("Failed to create IPC channel.");
let (sender, receiver) =
generic_channel::channel().expect("Failed to create IPC channel.");
self.window.send_to_embedder(EmbedderMsg::ShowContextMenu(
self.window.webview_id(),
sender,