script: Eliminate code duplication in the task queue (#34798)

Instead of creating a type for each `TaskSource` variety have each `TaskSource`
hold the same kind of sender (this was inconsistent before, but each
sender was effectively the same trait object), a pipeline, and a
`TaskSourceName`. This elminates the need to reimplement the same
queuing code for every task source.

In addition, have workers hold their own `TaskManager`. This allows just
exposing the manager on the `GlobalScope`. Currently the `TaskCanceller`
is different, but this will also be eliminated in a followup change.

This is a the first step toward having a shared set of `Sender`s on
`GlobalScope`.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

1 files changed, 0 insertions, 69 deletions

diff --git a/components/script/task_source/user_interaction.rs b/components/script/task_source/user_interaction.rs
deleted file mode 100644
index 19ed025fc9a..00000000000
--- a/components/script/task_source/user_interaction.rs
+++ /dev/null
@@ -1,69 +0,0 @@
-/* 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/. */
-
-use std::fmt;
-use std::result::Result;
-
-use base::id::PipelineId;
-use crossbeam_channel::Sender;
-use servo_atoms::Atom;
-
-use crate::dom::bindings::inheritance::Castable;
-use crate::dom::bindings::refcounted::Trusted;
-use crate::dom::event::{EventBubbles, EventCancelable, EventTask};
-use crate::dom::eventtarget::EventTarget;
-use crate::dom::window::Window;
-use crate::messaging::MainThreadScriptMsg;
-use crate::script_runtime::{CommonScriptMsg, ScriptThreadEventCategory};
-use crate::task::{TaskCanceller, TaskOnce};
-use crate::task_source::{TaskSource, TaskSourceName};
-
-#[derive(Clone, JSTraceable)]
-pub struct UserInteractionTaskSource(
-    #[no_trace] pub Sender<MainThreadScriptMsg>,
-    #[no_trace] pub PipelineId,
-);
-
-impl fmt::Debug for UserInteractionTaskSource {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "UserInteractionTaskSource(...)")
-    }
-}
-
-impl TaskSource for UserInteractionTaskSource {
-    const NAME: TaskSourceName = TaskSourceName::UserInteraction;
-
-    fn queue_with_canceller<T>(&self, task: T, canceller: &TaskCanceller) -> Result<(), ()>
-    where
-        T: TaskOnce + 'static,
-    {
-        let msg = MainThreadScriptMsg::Common(CommonScriptMsg::Task(
-            ScriptThreadEventCategory::InputEvent,
-            Box::new(canceller.wrap_task(task)),
-            Some(self.1),
-            UserInteractionTaskSource::NAME,
-        ));
-        self.0.send(msg).map_err(|_| ())
-    }
-}
-
-impl UserInteractionTaskSource {
-    pub fn queue_event(
-        &self,
-        target: &EventTarget,
-        name: Atom,
-        bubbles: EventBubbles,
-        cancelable: EventCancelable,
-        window: &Window,
-    ) {
-        let target = Trusted::new(target);
-        let task = EventTask {
-            target,
-            name,
-            bubbles,
-            cancelable,
-        };
-        let _ = self.queue(task, window.upcast());
-    }
-}