65 lines
2.3 KiB
JavaScript
65 lines
2.3 KiB
JavaScript
import { emojiComponents, keycapEmoji, vs16Emoji } from "../data.js";
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import { convertEmojiSequenceToUTF32 } from "../convert.js";
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import { getUnqualifiedEmojiSequence, joinEmojiSequences, splitEmojiSequences } from "../cleanup.js";
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import { getEmojiSequenceKeyword } from "../format.js";
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/**
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* Get qualified sequence, adding optional `FE0F` wherever it might exist
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*
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* This might result in sequence that is not actually valid, but considering
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* that `FE0F` is always treated as optional, full sequence used in regex will
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* catch both qualified and unqualified emojis, so proper sequence will get
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* caught anyway. This function just makes sure that in case if sequence does
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* have `FE0F`, it will be caught by regex too.
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*/
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function guessQualifiedEmojiSequence(sequence) {
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const split = splitEmojiSequences(sequence).map((part) => {
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if (part.indexOf(vs16Emoji) !== -1) return part;
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if (part.length === 2) {
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const lastNum = part[1];
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if (lastNum === keycapEmoji) return [
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part[0],
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vs16Emoji,
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lastNum
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];
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for (const key in emojiComponents) {
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const range = emojiComponents[key];
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if (lastNum >= range[0] && lastNum < range[1]) return [
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part[0],
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vs16Emoji,
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lastNum
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];
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}
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}
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return part.length === 1 ? [part[0], vs16Emoji] : part;
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});
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return joinEmojiSequences(split);
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}
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/**
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* Get qualified variations for emojis
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*
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* Also converts list to UTF-32 as needed and removes duplicate items
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*/
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function getQualifiedEmojiVariation(item) {
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const unqualifiedSequence = getUnqualifiedEmojiSequence(convertEmojiSequenceToUTF32(item.sequence));
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const result = {
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...item,
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sequence: guessQualifiedEmojiSequence(unqualifiedSequence)
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};
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if (result.sequenceKey) result.sequenceKey = getEmojiSequenceKeyword(unqualifiedSequence);
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return result;
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}
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/**
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* Get qualified emoji variations for set of emojis, ignoring duplicate entries
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*/
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function getQualifiedEmojiVariations(items) {
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const results = Object.create(null);
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for (let i = 0; i < items.length; i++) {
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const result = getQualifiedEmojiVariation(items[i]);
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const key = getEmojiSequenceKeyword(getUnqualifiedEmojiSequence(result.sequence));
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if (!results[key] || results[key].sequence.length < result.sequence.length) results[key] = result;
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}
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return Object.values(results);
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}
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export { getQualifiedEmojiVariation, getQualifiedEmojiVariations, guessQualifiedEmojiSequence }; |