From ee3f408c7d25accb5812c4f442ba7f4531e4b681 Mon Sep 17 00:00:00 2001
From: "Acid Chicken (硫酸鶏)" <root@acid-chicken.com>
Date: Sat, 20 May 2023 03:38:07 +0900
Subject: feat: impl IdlingRenderScheduler (#10547)

* feat: impl IdleRender

* test: pin time on Chromatic

* test: pin time on Chromatic

* fix: typo

* style: rename

* style: rename

* chore: back to setTimeout

* style: linebreak

* refactor: remove unused budget option

* refactor: use raw unix time

* fix: conflict error

* fix: floor

* fix: subtract

* Revert "fix: subtract"

This reverts commit 2ef4afaafc69d2fb8329b04c1b124dfa97b7e863.

* Revert "fix: floor"

This reverts commit bef8ecdf45c6afc52138921d16e2caca78cfd38d.

* Revert "refactor: use raw unix time"

This reverts commit 5199e13cb2829f3036101f95445cca3cb9c83703.
---
 packages/frontend/src/scripts/idle-render.ts | 38 ++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 packages/frontend/src/scripts/idle-render.ts

(limited to 'packages/frontend/src/scripts')

diff --git a/packages/frontend/src/scripts/idle-render.ts b/packages/frontend/src/scripts/idle-render.ts
new file mode 100644
index 0000000000..ccce8b02bf
--- /dev/null
+++ b/packages/frontend/src/scripts/idle-render.ts
@@ -0,0 +1,38 @@
+class IdlingRenderScheduler {
+	#renderers: Set<FrameRequestCallback>;
+	#rafId: number;
+	#ricId: number;
+
+	constructor() {
+		this.#renderers = new Set();
+		this.#rafId = 0;
+		this.#ricId = requestIdleCallback((deadline) => this.#schedule(deadline));
+	}
+
+	#schedule(deadline: IdleDeadline): void {
+		if (deadline.timeRemaining()) {
+			this.#rafId = requestAnimationFrame((time) => {
+				for (const renderer of this.#renderers) {
+					renderer(time);
+				}
+			});
+		}
+		this.#ricId = requestIdleCallback((arg) => this.#schedule(arg));
+	}
+
+	add(renderer: FrameRequestCallback): void {
+		this.#renderers.add(renderer);
+	}
+
+	delete(renderer: FrameRequestCallback): void {
+		this.#renderers.delete(renderer);
+	}
+
+	dispose(): void {
+		this.#renderers.clear();
+		cancelAnimationFrame(this.#rafId);
+		cancelIdleCallback(this.#ricId);
+	}
+}
+
+export const defaultIdlingRenderScheduler = new IdlingRenderScheduler();
-- 
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