Initial commit

quartz/util/emoji.ts

@@ -0,0 +1,47 @@
+const U200D = String.fromCharCode(8205)
+const UFE0Fg = /\uFE0F/g
+
+export function getIconCode(char: string) {
+  return toCodePoint(char.indexOf(U200D) < 0 ? char.replace(UFE0Fg, "") : char)
+}
+
+function toCodePoint(unicodeSurrogates: string) {
+  const r = []
+  let c = 0,
+    p = 0,
+    i = 0
+
+  while (i < unicodeSurrogates.length) {
+    c = unicodeSurrogates.charCodeAt(i++)
+    if (p) {
+      r.push((65536 + ((p - 55296) << 10) + (c - 56320)).toString(16))
+      p = 0
+    } else if (55296 <= c && c <= 56319) {
+      p = c
+    } else {
+      r.push(c.toString(16))
+    }
+  }
+  return r.join("-")
+}
+
+type EmojiMap = {
+  codePointToName: Record<string, string>
+  nameToBase64: Record<string, string>
+}
+
+let emojimap: EmojiMap | undefined = undefined
+export async function loadEmoji(code: string) {
+  if (!emojimap) {
+    const data = await import("./emojimap.json")
+    emojimap = data
+  }
+
+  const name = emojimap.codePointToName[`${code.toUpperCase()}`]
+  if (!name) throw new Error(`codepoint ${code} not found in map`)
+
+  const b64 = emojimap.nameToBase64[name]
+  if (!b64) throw new Error(`name ${name} not found in map`)
+
+  return b64
+}