feat(emoji): add Unicode 17 emoji and fix mixed skin tones (#2883)

fluxer_app/scripts/GenerateEmojiSprites.ts

@@ -52,69 +52,13 @@ async function renderSVGToBuffer(svgContent: string, size: number): Promise<Buff
 	return sharp(Buffer.from(fixed)).resize(size, size).png().toBuffer();
 }
 
-function hslToRgb(h: number, s: number, l: number): [number, number, number] {
-	h = ((h % 360) + 360) % 360;
-	h /= 360;
-	let r: number, g: number, b: number;
-	if (s === 0) {
-		r = g = b = l;
-	} else {
-		const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
-		const p = 2 * l - q;
-		const hueToRgb = (p: number, q: number, t: number): number => {
-			if (t < 0) t += 1;
-			if (t > 1) t -= 1;
-			if (t < 1 / 6) return p + (q - p) * 6 * t;
-			if (t < 1 / 2) return q;
-			if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
-			return p;
-		};
-		r = hueToRgb(p, q, h + 1 / 3);
-		g = hueToRgb(p, q, h);
-		b = hueToRgb(p, q, h - 1 / 3);
-	}
-	return [
-		Math.round(Math.min(1, Math.max(0, r)) * 255),
-		Math.round(Math.min(1, Math.max(0, g)) * 255),
-		Math.round(Math.min(1, Math.max(0, b)) * 255),
-	];
-}
-
-async function createPlaceholder(size: number): Promise<Buffer> {
-	const h = Math.random() * 360;
-	const [r, g, b] = hslToRgb(h, 0.7, 0.6);
-	const radius = Math.floor(size * 0.4);
-	const cx = Math.floor(size / 2);
-	const cy = Math.floor(size / 2);
-	const svg = `<svg width="${size}" height="${size}" xmlns="http://www.w3.org/2000/svg">
-    <circle cx="${cx}" cy="${cy}" r="${radius}" fill="rgb(${r},${g},${b})"/>
-  </svg>`;
-	return sharp(Buffer.from(svg)).png().toBuffer();
-}
-
 async function loadEmojiImage(surrogate: string, size: number): Promise<Buffer> {
 	const codepoint = convertToCodePoints(surrogate);
 	const svg = loadLocalTwemojiSVG(codepoint);
-	if (svg) {
-		try {
-			return await renderSVGToBuffer(svg, size);
-		} catch (error) {
-			console.error(`Failed to render SVG for ${codepoint}:`, error);
+	if (svg == null) {
+		throw new Error(`Missing SVG for ${codepoint} (${surrogate})`);
 	}
-	}
-	if (codepoint.includes('-200d-')) {
-		const basePart = codepoint.split('-200d-')[0];
-		const baseSvg = loadLocalTwemojiSVG(basePart);
-		if (baseSvg) {
-			try {
-				return await renderSVGToBuffer(baseSvg, size);
-			} catch (error) {
-				console.error(`Failed to render base SVG for ${basePart}:`, error);
-			}
-		}
-	}
-	console.error(`Missing SVG for ${codepoint} (${surrogate}), using placeholder`);
-	return createPlaceholder(size);
+	return renderSVGToBuffer(svg, size);
 }
 
 async function renderSpriteSheet(
@@ -164,11 +108,11 @@ async function renderSpriteSheet(
 }
 
 async function generateMainSpriteSheet(
-	emojiData: Record<string, Array<EmojiObject>>,
+	categories: Record<string, Array<EmojiObject>>,
 	outputDir: string,
 ): Promise<void> {
 	const base: Array<EmojiEntry> = [];
-	for (const objs of Object.values(emojiData)) {
+	for (const objs of Object.values(categories)) {
 		for (const obj of objs) {
 			base.push({surrogates: obj.surrogates});
 		}
@@ -177,7 +121,7 @@ async function generateMainSpriteSheet(
 }
 
 async function generateSkinToneSpriteSheets(
-	emojiData: Record<string, Array<EmojiObject>>,
+	categories: Record<string, Array<EmojiObject>>,
 	outputDir: string,
 ): Promise<void> {
 	const skinTones = ['\u{1F3FB}', '\u{1F3FC}', '\u{1F3FD}', '\u{1F3FE}', '\u{1F3FF}'];
@@ -185,7 +129,7 @@ async function generateSkinToneSpriteSheets(
 		const skinTone = skinTones[skinIndex];
 		const skinCodepoint = convertToCodePoints(skinTone);
 		const skinEntries: Array<EmojiEntry> = [];
-		for (const objs of Object.values(emojiData)) {
+		for (const objs of Object.values(categories)) {
 			for (const obj of objs) {
 				if (obj.skins && obj.skins.length > skinIndex && obj.skins[skinIndex].surrogates) {
 					skinEntries.push({surrogates: obj.skins[skinIndex].surrogates});
@@ -242,11 +186,11 @@ async function main(): Promise<void> {
 	const outputDir = join(appDir, 'src', 'media', 'images', 'emoji-sprites');
 	mkdirSync(outputDir, {recursive: true});
 	const emojiDataPath = join(appDir, 'src', 'media', 'data', 'emojis.json');
-	const emojiData: Record<string, Array<EmojiObject>> = JSON.parse(readFileSync(emojiDataPath, 'utf-8'));
+	const emojiData: {categories: Record<string, Array<EmojiObject>>} = JSON.parse(readFileSync(emojiDataPath, 'utf-8'));
 	console.log('Generating main sprite sheet...');
-	await generateMainSpriteSheet(emojiData, outputDir);
+	await generateMainSpriteSheet(emojiData.categories, outputDir);
 	console.log('Generating skin tone sprite sheets...');
-	await generateSkinToneSpriteSheets(emojiData, outputDir);
+	await generateSkinToneSpriteSheets(emojiData.categories, outputDir);
 	console.log('Generating picker sprite sheet...');
 	await generatePickerSpriteSheet(outputDir);
 	console.log('Emoji sprites generated successfully.');

fluxer_app/src/features/expressions/utils/EmojiCodepointUtils.ts

@@ -1,8 +1,11 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
+const EYE_IN_SPEECH_BUBBLE = '\u{1F441}\u200D\u{1F5E8}';
+
 export function convertToCodePoints(emoji: string): string {
-	const containsZWJ = emoji.includes('\u200D');
-	const processedEmoji = containsZWJ ? emoji : emoji.replace(/\uFE0F/g, '');
+	const emojiWithoutFE0F = emoji.replace(/\uFE0F/g, '');
+	const keepsFE0F = emoji.includes('\u200D') && emojiWithoutFE0F !== EYE_IN_SPEECH_BUBBLE;
+	const processedEmoji = keepsFE0F ? emoji : emojiWithoutFE0F;
 	return Array.from(processedEmoji)
 		.map((char) => char.codePointAt(0)?.toString(16).replace(/^0+/, '') || '')
 		.join('-');

fluxer_app/src/features/expressions/utils/UnicodeEmojis.ts

@@ -2,6 +2,7 @@
 
 import type {UnicodeEmoji} from '@app/features/emoji/types/EmojiTypes';
 import * as EmojiUtils from '@app/features/expressions/utils/EmojiUtils';
+import type {EmojiSurrogateMatch} from '@app/features/messaging/utils/markdown/parser/EmojiParsers';
 import * as RegexUtils from '@app/features/messaging/utils/RegexUtils';
 import emojiData from '@app/media/data/emojis.json';
 import {SKIN_TONE_SURROGATES} from '@fluxer/constants/src/EmojiConstants';
@@ -60,6 +61,15 @@ const categories = Object.freeze(Object.keys(emojiData.categories));
 
 const toCanonicalSurrogate = (surrogate: string): string => surrogate.replace(/️/g, '');
 
+const EYE_IN_SPEECH_BUBBLE_FULLY_QUALIFIED = '\u{1F441}\uFE0F\u200D\u{1F5E8}\uFE0F';
+const HAIR_COMPONENT_NAMES: Record<string, string> = {
+	'\u{1F9B0}': 'red_hair',
+	'\u{1F9B1}': 'curly_hair',
+	'\u{1F9B3}': 'white_hair',
+	'\u{1F9B2}': 'bald',
+};
+const REGIONAL_INDICATOR_PAIR_PATTERN = '\\uD83C[\\uDDE6-\\uDDFF]\\uD83C[\\uDDE6-\\uDDFF]';
+
 let defaultSkinTone: string = '';
 
 class UnicodeEmojiClass {
@@ -216,6 +226,11 @@ function buildEmojiIndex(): EmojiIndex {
 				surrogateToName[skinToneEntry.surrogatePair] = skinToneEntry.name;
 				canonicalSurrogateToName[toCanonicalSurrogate(skinToneEntry.surrogatePair)] = skinToneEntry.name;
 			});
+			const skins = (emojiObject as {skins?: ReadonlyArray<{names: ReadonlyArray<string>; surrogates: string}>}).skins;
+			skins?.slice(SKIN_TONE_SURROGATES.length).forEach((skin) => {
+				surrogateToName[skin.surrogates] = skin.names[0];
+				canonicalSurrogateToName[toCanonicalSurrogate(skin.surrogates)] = skin.names[0];
+			});
 			categoryByEmojiName[emoji.uniqueName] = category;
 			emojis.push(emojiJson);
 			return emojiJson;
@@ -228,6 +243,20 @@ function buildEmojiIndex(): EmojiIndex {
 		canonicalSurrogateToName[toCanonicalSurrogate(surrogatePair)] = `skin-tone-${index + 1}`;
 	});
 
+	Object.entries(HAIR_COMPONENT_NAMES).forEach(([surrogate, name]) => {
+		surrogateToName[surrogate] = name;
+		canonicalSurrogateToName[surrogate] = name;
+	});
+
+	Object.keys(surrogateToName)
+		.filter((surrogate) => surrogate.includes('\u20E3'))
+		.map(toCanonicalSurrogate)
+		.concat(EYE_IN_SPEECH_BUBBLE_FULLY_QUALIFIED)
+		.forEach((alias) => {
+			const name = canonicalSurrogateToName[toCanonicalSurrogate(alias)];
+			if (name) surrogateToName[alias] = name;
+		});
+
 	const keywordOwner: Record<string, string> = {};
 	const keywordCount: Record<string, number> = {};
 
@@ -275,7 +304,7 @@ function buildEmojiIndex(): EmojiIndex {
 		emojis,
 		skinToneSpriteCount,
 		baseSpriteCount,
-		emojiSurrogateRegex: new RegExp(`(${surrogateAlternation})`, 'g'),
+		emojiSurrogateRegex: new RegExp(`(${REGIONAL_INDICATOR_PAIR_PATTERN}|${surrogateAlternation})`, 'g'),
 		emojiShortcutRegex: new RegExp(`^(${shortcutAlternation})`),
 	};
 }
@@ -288,6 +317,50 @@ function getEmojiIndex(): EmojiIndex {
 const lookupSurrogateName = (surrogate: string): string | null =>
 	getEmojiIndex().canonicalSurrogateToName[toCanonicalSurrogate(surrogate)] ?? null;
 
+const isRegionalIndicatorAt = (text: string, index: number): boolean => {
+	const lowSurrogate = text.charCodeAt(index + 1);
+	return text.charCodeAt(index) === 0xd83c && lowSurrogate >= 0xdde6 && lowSurrogate <= 0xddff;
+};
+
+const isInsideRegionalIndicatorPair = (text: string, index: number): boolean => {
+	if (!isRegionalIndicatorAt(text, index)) return false;
+	let runStart = index;
+	while (isRegionalIndicatorAt(text, runStart - 2)) runStart -= 2;
+	return (index - runStart) % 4 === 2;
+};
+
+const toEmojiSurrogateMatch = (text: string, start: number, end: number): EmojiSurrogateMatch => ({
+	start,
+	end,
+	name: lookupSurrogateName(text.slice(start, end)),
+});
+
+function* matchEmojiSurrogates(text: string, startIndex = 0): Generator<EmojiSurrogateMatch, void> {
+	const regex = getEmojiIndex().emojiSurrogateRegex;
+	let index = startIndex;
+	if (isInsideRegionalIndicatorPair(text, index)) {
+		yield toEmojiSurrogateMatch(text, index, index + 2);
+		index += 2;
+	}
+	while (true) {
+		regex.lastIndex = index;
+		const match = regex.exec(text);
+		if (match == null) return;
+		index = match.index + match[0].length;
+		const emojiMatch = toEmojiSurrogateMatch(text, match.index, index);
+		const isUnknownRegionalIndicatorPair =
+			emojiMatch.name == null &&
+			isRegionalIndicatorAt(text, match.index) &&
+			isRegionalIndicatorAt(text, match.index + 2);
+		if (isUnknownRegionalIndicatorPair) {
+			yield toEmojiSurrogateMatch(text, match.index, match.index + 2);
+			yield toEmojiSurrogateMatch(text, match.index + 2, index);
+		} else {
+			yield emojiMatch;
+		}
+	}
+}
+
 const EMOJI_SHORTCODE_RE = /^:([^\s:]+(?:::skin-tone-[0-9])?):/;
 const categoryIcons = {
 	people: SmileyIcon,
@@ -377,6 +450,8 @@ export default {
 	getSurrogateName: (surrogate: string): string | null => {
 		return lookupSurrogateName(surrogate);
 	},
+	matchEmojiSurrogates,
+	isInsideRegionalIndicatorPair,
 	findEmojiByName: (emojiName: string): UnicodeEmoji | null => {
 		return getEmojiIndex().nameToEmoji[emojiName] || null;
 	},
@@ -400,8 +475,5 @@ export default {
 	get EMOTICON_PREFIX_RE(): RegExp {
 		return getEmojiIndex().emojiShortcutRegex;
 	},
-	get EMOJI_SURROGATE_RE(): RegExp {
-		return getEmojiIndex().emojiSurrogateRegex;
-	},
 	EMOJI_SPRITES,
 };

fluxer_app/src/features/lexical/composer/ComposerEmojiShortcode.ts

@@ -29,17 +29,19 @@ export function registerComposerEmojiShortcode(editor: LexicalEditor, resolve: C
 }
 
 function findUnicodeEmoji(text: string, startIndex: number): TypedEmojiMatch | null {
-	const pattern = new RegExp(UnicodeEmojis.EMOJI_SURROGATE_RE.source, 'g');
-	pattern.lastIndex = startIndex;
-	const match = pattern.exec(text);
-	if (match == null) {
+	const matches = UnicodeEmojis.matchEmojiSurrogates(text, startIndex);
+	let match = matches.next().value;
+	if (match && UnicodeEmojis.isInsideRegionalIndicatorPair(text, match.end)) {
+		match = matches.next().value;
+	}
+	if (!match) {
 		return null;
 	}
-	const name = UnicodeEmojis.nameForSurrogate(match[0], false);
+	const name = match.name;
 	if (!name) {
 		return null;
 	}
-	return {start: match.index, end: match.index + match[0].length, name};
+	return {start: match.start, end: match.end, name};
 }
 
 interface EmojiToken extends TypedEmojiMatch {

fluxer_app/src/features/messaging/utils/markdown/EmojiProviderSetup.ts

@@ -5,7 +5,7 @@ import {type EmojiProvider, setEmojiParserConfig} from '@app/features/messaging/
 import {SKIN_TONE_SURROGATES} from '@fluxer/constants/src/EmojiConstants';
 
 const emojiProvider: EmojiProvider = {
-	getSurrogateName: UnicodeEmojis.getSurrogateName,
+	matchEmojiSurrogates: UnicodeEmojis.matchEmojiSurrogates,
 	findEmojiByName: UnicodeEmojis.findEmojiByShortcodeName,
 	findEmojiWithSkinTone: UnicodeEmojis.findEmojiWithSkinTone,
 };
@@ -13,9 +13,6 @@ const emojiProvider: EmojiProvider = {
 export function initializeEmojiParser(): void {
 	setEmojiParserConfig({
 		emojiProvider,
-		get emojiRegex() {
-			return UnicodeEmojis.EMOJI_SURROGATE_RE;
-		},
 		skinToneSurrogates: SKIN_TONE_SURROGATES,
 	});
 }

fluxer_app/src/features/messaging/utils/markdown/parser/EmojiParsers.ts

@@ -4,17 +4,21 @@ export interface UnicodeEmoji {
 	surrogates: string;
 }
 
+export interface EmojiSurrogateMatch {
+	start: number;
+	end: number;
+	name: string | null;
+}
+
 export interface EmojiProvider {
-	getSurrogateName(surrogate: string): string | null;
+	matchEmojiSurrogates(text: string): Iterable<EmojiSurrogateMatch>;
 	findEmojiByName(name: string): UnicodeEmoji | null;
 	findEmojiWithSkinTone(baseName: string, skinToneSurrogate: string): UnicodeEmoji | null;
 }
 
 export interface EmojiParserConfig {
 	emojiProvider?: EmojiProvider;
-	emojiRegex?: RegExp;
 	skinToneSurrogates?: ReadonlyArray<string>;
-	convertToCodePoints?: (emoji: string) => string;
 }
 
 let globalEmojiConfig: EmojiParserConfig | null = null;

fluxer_app/src/features/messaging/utils/markdown/parser/MarkdownParserWasm.ts

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: AGPL-3.0-or-later
 
+import {convertToCodePoints} from '@app/features/expressions/utils/EmojiCodepointUtils';
 import {flattenAST} from '@app/features/messaging/utils/markdown/parser/AstUtils';
 import {getEmojiParserConfig} from '@app/features/messaging/utils/markdown/parser/EmojiParsers';
 import {MARKDOWN_PARSER_WASM_BASE64} from '@app/features/messaging/utils/markdown/parser/MarkdownParserWasmBytes';
@@ -202,14 +203,6 @@ class Utf8OffsetTracker {
 	}
 }
 
-function defaultCodepoints(emoji: string): string {
-	const containsZwJ = emoji.includes('‍');
-	const processed = containsZwJ ? emoji : emoji.replace(/️/g, '');
-	return Array.from(processed)
-		.map((char) => char.codePointAt(0)?.toString(16).replace(/^0+/, '') || '')
-		.join('-');
-}
-
 const PLAINTEXT_SYMBOLS = new Set(['™', '™️', '©', '©️', '®', '®️']);
 const SPECIAL_SHORTCODES: Record<string, string> = {
 	tm: '™',
@@ -226,19 +219,14 @@ function buildEmojiContext(input: string): string {
 	const provider = config?.emojiProvider;
 	let context = '';
 	if (!provider) return context;
-	const convertToCodePoints = config.convertToCodePoints || defaultCodepoints;
-	const emojiRegex = config.emojiRegex;
-	if (emojiRegex) {
 	const offsetTracker = new Utf8OffsetTracker();
-		emojiRegex.lastIndex = 0;
-		let match: RegExpExecArray | null;
-		while ((match = emojiRegex.exec(input)) !== null) {
-			const candidate = match[0];
-			if (!candidate || PLAINTEXT_SYMBOLS.has(candidate)) continue;
-			const name = provider.getSurrogateName(candidate);
+	for (const match of provider.matchEmojiSurrogates(input)) {
+		const candidate = input.slice(match.start, match.end);
+		if (PLAINTEXT_SYMBOLS.has(candidate)) continue;
+		const name = match.name;
 		if (!name) continue;
 		const candidateBytes = textEncoder.encode(candidate).byteLength;
-			const byteOffset = offsetTracker.offsetFor(input, match.index);
+		const byteOffset = offsetTracker.offsetFor(input, match.start);
 		context += appendContextLine([
 			'S',
 			String(byteOffset),
@@ -249,7 +237,6 @@ function buildEmojiContext(input: string): string {
 		]);
 		offsetTracker.advance(candidate.length, candidateBytes);
 	}
-	}
 	const shortcodeRegex = /:([\p{L}\p{N}_-]+):/gu;
 	const seen = new Set<string>();
 	let shortcodeMatch: RegExpExecArray | null;

packages/markdown_parser/rust/src/inline.rs

@@ -2,6 +2,7 @@
 
 use crate::ast::{EmojiKind, Node, ParserFlags, ParserResult};
 use crate::constants::{CODE_FENCE_LENGTH, MAX_INLINE_DEPTH, MAX_LINE_LENGTH};
+use crate::emoji::{EmojiContext, StandardEmoji};
 use crate::links;
 use crate::normalize::{
     combine_adjacent_text, compact_empty_text_nodes, flatten_top_level_formatting,
@@ -168,7 +169,13 @@ fn parse_inline_with_context(
 
         if let Some(result) = parse_regional_indicator_flag(remaining) {
             flush_accumulated_text(&mut nodes, &mut accumulated);
-            nodes.push(result.node);
+            push_regional_indicator_pair(
+                &mut nodes,
+                parser.emoji_context(),
+                base_offset + position,
+                &remaining[..result.advance],
+                result.node,
+            );
             position += result.advance;
             continue;
         }
@@ -349,6 +356,49 @@ fn parse_regional_indicator_flag(text: &str) -> Option<ParserResult> {
     })
 }
 
+fn push_regional_indicator_pair(
+    nodes: &mut Vec<Node>,
+    emoji_context: &EmojiContext,
+    offset: usize,
+    pair: &str,
+    flag: Node,
+) {
+    let (first, second) = pair.split_at(pair.len() / 2);
+    match emoji_context.standard_at(offset) {
+        Some(emoji) if emoji.raw == pair => nodes.push(standard_emoji_node(emoji)),
+        Some(emoji) if emoji.raw == first => {
+            nodes.push(standard_emoji_node(emoji));
+            match emoji_context.standard_at(offset + first.len()) {
+                Some(emoji) if emoji.raw == second => nodes.push(standard_emoji_node(emoji)),
+                _ => nodes.extend(regional_indicator_emoji(second)),
+            }
+        }
+        _ => nodes.push(flag),
+    }
+}
+
+fn standard_emoji_node(emoji: &StandardEmoji) -> Node {
+    Node::Emoji {
+        kind: EmojiKind::Standard {
+            raw: emoji.raw.clone(),
+            codepoints: emoji.codepoints.clone(),
+            name: emoji.name.clone(),
+        },
+    }
+}
+
+fn regional_indicator_emoji(text: &str) -> Option<Node> {
+    let ch = text.chars().next()?;
+    let letter = regional_indicator_letter(ch)?;
+    Some(Node::Emoji {
+        kind: EmojiKind::Standard {
+            raw: ch.to_string(),
+            codepoints: format!("{:x}", ch as u32),
+            name: format!("regional_indicator_{letter}"),
+        },
+    })
+}
+
 fn regional_indicator_letter(ch: char) -> Option<char> {
     let codepoint = ch as u32;
     if !(0x1f1e6..=0x1f1ff).contains(&codepoint) {

packages/markdown_parser/rust/tests/fixtures.rs

@@ -151,6 +151,67 @@ fn native_parser_fixtures_cover_typescript_suite_surface() {
     );
 }
 
+#[test]
+fn native_parser_pairs_regional_indicators_with_emoji_context() {
+    assert_eq!(
+        parse(
+            "🇦🇧🇸🇪",
+            0,
+            "S\t0\t4\t🇦\tregional_indicator_a\t1f1e6\nS\t4\t4\t🇧\tregional_indicator_b\t1f1e7\nS\t8\t8\t🇸🇪\tflag_se\t1f1f8-1f1ea\n"
+        ),
+        json!({"nodes":[
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇦","codepoints":"1f1e6","name":"regional_indicator_a"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇧","codepoints":"1f1e7","name":"regional_indicator_b"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇸🇪","codepoints":"1f1f8-1f1ea","name":"flag_se"}}
+        ]})
+    );
+    assert_eq!(
+        parse(
+            "🇦🇧🇦🇸",
+            0,
+            "S\t0\t4\t🇦\tregional_indicator_a\t1f1e6\nS\t4\t4\t🇧\tregional_indicator_b\t1f1e7\nS\t8\t8\t🇦🇸\tflag_as\t1f1e6-1f1f8\n"
+        ),
+        json!({"nodes":[
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇦","codepoints":"1f1e6","name":"regional_indicator_a"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇧","codepoints":"1f1e7","name":"regional_indicator_b"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇦🇸","codepoints":"1f1e6-1f1f8","name":"flag_as"}}
+        ]})
+    );
+    assert_eq!(
+        parse("Sark 🇨🇶", 0, "S\t5\t8\t🇨🇶\tflag_sark\t1f1e8-1f1f6\n"),
+        json!({"nodes":[
+            {"type":"Text","content":"Sark "},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇨🇶","codepoints":"1f1e8-1f1f6","name":"flag_sark"}}
+        ]})
+    );
+    assert_eq!(
+        parse("x 🇦", 0, "S\t2\t4\t🇦\tregional_indicator_a\t1f1e6\n"),
+        json!({"nodes":[
+            {"type":"Text","content":"x "},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇦","codepoints":"1f1e6","name":"regional_indicator_a"}}
+        ]})
+    );
+    assert_eq!(
+        parse(
+            "🇦🇧🇸🇪",
+            0,
+            "S\t0\t4\t🇦\tregional_indicator_a\t1f1e6\nS\t4\t8\t🇧🇸\tflag_bs\t1f1e7-1f1f8\nS\t12\t4\t🇪\tregional_indicator_e\t1f1ea\n"
+        ),
+        json!({"nodes":[
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇦","codepoints":"1f1e6","name":"regional_indicator_a"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇧","codepoints":"1f1e7","name":"regional_indicator_b"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇸🇪","codepoints":"1f1f8-1f1ea","name":"flag_se"}}
+        ]})
+    );
+    assert_eq!(
+        parse("🇦🇧🇸🇪", 0, ""),
+        json!({"nodes":[
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇦🇧","codepoints":"1f1e6-1f1e7","name":"flag_ab"}},
+            {"type":"Emoji","kind":{"kind":"Standard","raw":"🇸🇪","codepoints":"1f1f8-1f1ea","name":"flag_se"}}
+        ]})
+    );
+}
+
 #[test]
 fn native_parser_allows_apostrophe_in_masked_link_destination() {
     let url = "https://docs.example.test/help/faq/#why-can't-this-link-parse%3F";