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