From e85ea490003870c5a6c004bb2e6bd6d76769a2ce Mon Sep 17 00:00:00 2001
From: KylinDC <solder-hulls.06@icloud.com>
Date: Mon, 19 Feb 2024 18:31:09 +0000
Subject: [PATCH] feat(i18n): add Simplified Chinese (#896)

---
 quartz/components/scripts/darkmode.inline.ts |   35 ++++++++++++++++++++++++++---------
 1 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/quartz/components/scripts/darkmode.inline.ts b/quartz/components/scripts/darkmode.inline.ts
index e16f4f8..48e0aa1 100644
--- a/quartz/components/scripts/darkmode.inline.ts
+++ b/quartz/components/scripts/darkmode.inline.ts
@@ -2,22 +2,39 @@
 const currentTheme = localStorage.getItem("theme") ?? userPref
 document.documentElement.setAttribute("saved-theme", currentTheme)
 
+const emitThemeChangeEvent = (theme: "light" | "dark") => {
+  const event: CustomEventMap["themechange"] = new CustomEvent("themechange", {
+    detail: { theme },
+  })
+  document.dispatchEvent(event)
+}
+
 document.addEventListener("nav", () => {
-  const switchTheme = (e: any) => {
-    if (e.target.checked) {
-      document.documentElement.setAttribute("saved-theme", "dark")
-      localStorage.setItem("theme", "dark")
-    } else {
-      document.documentElement.setAttribute("saved-theme", "light")
-      localStorage.setItem("theme", "light")
-    }
+  const switchTheme = (e: Event) => {
+    const newTheme = (e.target as HTMLInputElement)?.checked ? "dark" : "light"
+    document.documentElement.setAttribute("saved-theme", newTheme)
+    localStorage.setItem("theme", newTheme)
+    emitThemeChangeEvent(newTheme)
+  }
+
+  const themeChange = (e: MediaQueryListEvent) => {
+    const newTheme = e.matches ? "dark" : "light"
+    document.documentElement.setAttribute("saved-theme", newTheme)
+    localStorage.setItem("theme", newTheme)
+    toggleSwitch.checked = e.matches
+    emitThemeChangeEvent(newTheme)
   }
 
   // Darkmode toggle
   const toggleSwitch = document.querySelector("#darkmode-toggle") as HTMLInputElement
-  toggleSwitch.removeEventListener("change", switchTheme)
   toggleSwitch.addEventListener("change", switchTheme)
+  window.addCleanup(() => toggleSwitch.removeEventListener("change", switchTheme))
   if (currentTheme === "dark") {
     toggleSwitch.checked = true
   }
+
+  // Listen for changes in prefers-color-scheme
+  const colorSchemeMediaQuery = window.matchMedia("(prefers-color-scheme: dark)")
+  colorSchemeMediaQuery.addEventListener("change", themeChange)
+  window.addCleanup(() => colorSchemeMediaQuery.removeEventListener("change", themeChange))
 })

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