wip

packages/frontend-embed/src/components/EmMfm.ts

@@ -0,0 +1,466 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { VNode, h, SetupContext, provide } from 'vue';
+import * as mfm from 'mfm-js';
+import * as Misskey from 'misskey-js';
+import EmUrl from '@/components/EmUrl.vue';
+import EmTime from '@/components/EmTime.vue';
+import EmLink from '@/components/EmLink.vue';
+import EmMention from '@/components/EmMention.vue';
+import EmEmoji from '@/components/EmEmoji.vue';
+import EmCustomEmoji from '@/components/EmCustomEmoji.vue';
+import EmCode from '@/components/EmCode.vue';
+import EmCodeInline from '@/components/EmCodeInline.vue';
+import EmGoogle from '@/components/EmGoogle.vue';
+import EmSparkle from '@/components/EmSparkle.vue';
+import EmA from '@/components/EmA.vue';
+import { host } from '@/config.js';
+import { nyaize as doNyaize } from '@/to-be-shared/nyaize.js';
+import { safeParseFloat } from '@/to-be-shared/safe-parse.js';
+
+const QUOTE_STYLE = `
+display: block;
+margin: 8px;
+padding: 6px 0 6px 12px;
+color: var(--fg);
+border-left: solid 3px var(--fg);
+opacity: 0.7;
+`.split('\n').join(' ');
+
+type MfmProps = {
+	text: string;
+	plain?: boolean;
+	nowrap?: boolean;
+	author?: Misskey.entities.UserLite;
+	isNote?: boolean;
+	emojiUrls?: Record<string, string>;
+	rootScale?: number;
+	nyaize?: boolean | 'respect';
+	parsedNodes?: mfm.MfmNode[] | null;
+	enableEmojiMenu?: boolean;
+	enableEmojiMenuReaction?: boolean;
+	linkNavigationBehavior?: EmABehavior;
+};
+
+type MfmEvents = {
+	clickEv(id: string): void;
+};
+
+// eslint-disable-next-line import/no-default-export
+export default function (props: MfmProps, { emit }: { emit: SetupContext<MfmEvents>['emit'] }) {
+	provide('linkNavigationBehavior', props.linkNavigationBehavior);
+
+	const isNote = props.isNote ?? true;
+	const shouldNyaize = props.nyaize ? props.nyaize === 'respect' ? props.author?.isCat : false : false;
+
+	// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+	if (props.text == null || props.text === '') return;
+
+	const rootAst = props.parsedNodes ?? (props.plain ? mfm.parseSimple : mfm.parse)(props.text);
+
+	const validTime = (t: string | boolean | null | undefined) => {
+		if (t == null) return null;
+		if (typeof t === 'boolean') return null;
+		return t.match(/^\-?[0-9.]+s$/) ? t : null;
+	};
+
+	const validColor = (c: unknown): string | null => {
+		if (typeof c !== 'string') return null;
+		return c.match(/^[0-9a-f]{3,6}$/i) ? c : null;
+	};
+
+	const useAnim = true;
+
+	/**
+	 * Gen Vue Elements from MFM AST
+	 * @param ast MFM AST
+	 * @param scale How times large the text is
+	 * @param disableNyaize Whether nyaize is disabled or not
+	 */
+	const genEl = (ast: mfm.MfmNode[], scale: number, disableNyaize = false) => ast.map((token): VNode | string | (VNode | string)[] => {
+		switch (token.type) {
+			case 'text': {
+				let text = token.props.text.replace(/(\r\n|\n|\r)/g, '\n');
+				if (!disableNyaize && shouldNyaize) {
+					text = doNyaize(text);
+				}
+
+				if (!props.plain) {
+					const res: (VNode | string)[] = [];
+					for (const t of text.split('\n')) {
+						res.push(h('br'));
+						res.push(t);
+					}
+					res.shift();
+					return res;
+				} else {
+					return [text.replace(/\n/g, ' ')];
+				}
+			}
+
+			case 'bold': {
+				return [h('b', genEl(token.children, scale))];
+			}
+
+			case 'strike': {
+				return [h('del', genEl(token.children, scale))];
+			}
+
+			case 'italic': {
+				return h('i', {
+					style: 'font-style: oblique;',
+				}, genEl(token.children, scale));
+			}
+
+			case 'fn': {
+				// TODO: CSSを文字列で組み立てていくと token.props.args.~~~ 経由でCSSインジェクションできるのでよしなにやる
+				let style: string | undefined;
+				switch (token.props.name) {
+					case 'tada': {
+						const speed = validTime(token.props.args.speed) ?? '1s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = 'font-size: 150%;' + (useAnim ? `animation: global-tada ${speed} linear infinite both; animation-delay: ${delay};` : '');
+						break;
+					}
+					case 'jelly': {
+						const speed = validTime(token.props.args.speed) ?? '1s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = (useAnim ? `animation: mfm-rubberBand ${speed} linear infinite both; animation-delay: ${delay};` : '');
+						break;
+					}
+					case 'twitch': {
+						const speed = validTime(token.props.args.speed) ?? '0.5s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = useAnim ? `animation: mfm-twitch ${speed} ease infinite; animation-delay: ${delay};` : '';
+						break;
+					}
+					case 'shake': {
+						const speed = validTime(token.props.args.speed) ?? '0.5s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = useAnim ? `animation: mfm-shake ${speed} ease infinite; animation-delay: ${delay};` : '';
+						break;
+					}
+					case 'spin': {
+						const direction =
+							token.props.args.left ? 'reverse' :
+							token.props.args.alternate ? 'alternate' :
+							'normal';
+						const anime =
+							token.props.args.x ? 'mfm-spinX' :
+							token.props.args.y ? 'mfm-spinY' :
+							'mfm-spin';
+						const speed = validTime(token.props.args.speed) ?? '1.5s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = useAnim ? `animation: ${anime} ${speed} linear infinite; animation-direction: ${direction}; animation-delay: ${delay};` : '';
+						break;
+					}
+					case 'jump': {
+						const speed = validTime(token.props.args.speed) ?? '0.75s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = useAnim ? `animation: mfm-jump ${speed} linear infinite; animation-delay: ${delay};` : '';
+						break;
+					}
+					case 'bounce': {
+						const speed = validTime(token.props.args.speed) ?? '0.75s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = useAnim ? `animation: mfm-bounce ${speed} linear infinite; transform-origin: center bottom; animation-delay: ${delay};` : '';
+						break;
+					}
+					case 'flip': {
+						const transform =
+							(token.props.args.h && token.props.args.v) ? 'scale(-1, -1)' :
+							token.props.args.v ? 'scaleY(-1)' :
+							'scaleX(-1)';
+						style = `transform: ${transform};`;
+						break;
+					}
+					case 'x2': {
+						return h('span', {
+							class: 'mfm-x2',
+						}, genEl(token.children, scale * 2));
+					}
+					case 'x3': {
+						return h('span', {
+							class: 'mfm-x3',
+						}, genEl(token.children, scale * 3));
+					}
+					case 'x4': {
+						return h('span', {
+							class: 'mfm-x4',
+						}, genEl(token.children, scale * 4));
+					}
+					case 'font': {
+						const family =
+							token.props.args.serif ? 'serif' :
+							token.props.args.monospace ? 'monospace' :
+							token.props.args.cursive ? 'cursive' :
+							token.props.args.fantasy ? 'fantasy' :
+							token.props.args.emoji ? 'emoji' :
+							token.props.args.math ? 'math' :
+							null;
+						if (family) style = `font-family: ${family};`;
+						break;
+					}
+					case 'blur': {
+						return h('span', {
+							class: '_mfm_blur_',
+						}, genEl(token.children, scale));
+					}
+					case 'rainbow': {
+						if (!useAnim) {
+							return h('span', {
+								class: '_mfm_rainbow_fallback_',
+							}, genEl(token.children, scale));
+						}
+						const speed = validTime(token.props.args.speed) ?? '1s';
+						const delay = validTime(token.props.args.delay) ?? '0s';
+						style = `animation: mfm-rainbow ${speed} linear infinite; animation-delay: ${delay};`;
+						break;
+					}
+					case 'sparkle': {
+						if (!useAnim) {
+							return genEl(token.children, scale);
+						}
+						return h(EmSparkle, {}, genEl(token.children, scale));
+					}
+					case 'rotate': {
+						const degrees = safeParseFloat(token.props.args.deg) ?? 90;
+						style = `transform: rotate(${degrees}deg); transform-origin: center center;`;
+						break;
+					}
+					case 'position': {
+						const x = safeParseFloat(token.props.args.x) ?? 0;
+						const y = safeParseFloat(token.props.args.y) ?? 0;
+						style = `transform: translateX(${x}em) translateY(${y}em);`;
+						break;
+					}
+					case 'scale': {
+						const x = Math.min(safeParseFloat(token.props.args.x) ?? 1, 5);
+						const y = Math.min(safeParseFloat(token.props.args.y) ?? 1, 5);
+						style = `transform: scale(${x}, ${y});`;
+						scale = scale * Math.max(x, y);
+						break;
+					}
+					case 'fg': {
+						let color = validColor(token.props.args.color);
+						color = color ?? 'f00';
+						style = `color: #${color}; overflow-wrap: anywhere;`;
+						break;
+					}
+					case 'bg': {
+						let color = validColor(token.props.args.color);
+						color = color ?? 'f00';
+						style = `background-color: #${color}; overflow-wrap: anywhere;`;
+						break;
+					}
+					case 'border': {
+						let color = validColor(token.props.args.color);
+						color = color ? `#${color}` : 'var(--accent)';
+						let b_style = token.props.args.style;
+						if (
+							typeof b_style !== 'string' ||
+							!['hidden', 'dotted', 'dashed', 'solid', 'double', 'groove', 'ridge', 'inset', 'outset']
+								.includes(b_style)
+						) b_style = 'solid';
+						const width = safeParseFloat(token.props.args.width) ?? 1;
+						const radius = safeParseFloat(token.props.args.radius) ?? 0;
+						style = `border: ${width}px ${b_style} ${color}; border-radius: ${radius}px;${token.props.args.noclip ? '' : ' overflow: clip;'}`;
+						break;
+					}
+					case 'ruby': {
+						if (token.children.length === 1) {
+							const child = token.children[0];
+							let text = child.type === 'text' ? child.props.text : '';
+							if (!disableNyaize && shouldNyaize) {
+								text = doNyaize(text);
+							}
+							return h('ruby', {}, [text.split(' ')[0], h('rt', text.split(' ')[1])]);
+						} else {
+							const rt = token.children.at(-1)!;
+							let text = rt.type === 'text' ? rt.props.text : '';
+							if (!disableNyaize && shouldNyaize) {
+								text = doNyaize(text);
+							}
+							return h('ruby', {}, [...genEl(token.children.slice(0, token.children.length - 1), scale), h('rt', text.trim())]);
+						}
+					}
+					case 'unixtime': {
+						const child = token.children[0];
+						const unixtime = parseInt(child.type === 'text' ? child.props.text : '');
+						return h('span', {
+							style: 'display: inline-block; font-size: 90%; border: solid 1px var(--divider); border-radius: 999px; padding: 4px 10px 4px 6px;',
+						}, [
+							h('i', {
+								class: 'ti ti-clock',
+								style: 'margin-right: 0.25em;',
+							}),
+							h(EmTime, {
+								key: Math.random(),
+								time: unixtime * 1000,
+								mode: 'detail',
+							}),
+						]);
+					}
+					case 'clickable': {
+						return h('span', { onClick(ev: MouseEvent): void {
+							ev.stopPropagation();
+							ev.preventDefault();
+							const clickEv = typeof token.props.args.ev === 'string' ? token.props.args.ev : '';
+							emit('clickEv', clickEv);
+						} }, genEl(token.children, scale));
+					}
+				}
+				if (style === undefined) {
+					return h('span', {}, ['$[', token.props.name, ' ', ...genEl(token.children, scale), ']']);
+				} else {
+					return h('span', {
+						style: 'display: inline-block; ' + style,
+					}, genEl(token.children, scale));
+				}
+			}
+
+			case 'small': {
+				return [h('small', {
+					style: 'opacity: 0.7;',
+				}, genEl(token.children, scale))];
+			}
+
+			case 'center': {
+				return [h('div', {
+					style: 'text-align:center;',
+				}, genEl(token.children, scale))];
+			}
+
+			case 'url': {
+				return [h(EmUrl, {
+					key: Math.random(),
+					url: token.props.url,
+					rel: 'nofollow noopener',
+				})];
+			}
+
+			case 'link': {
+				return [h(EmLink, {
+					key: Math.random(),
+					url: token.props.url,
+					rel: 'nofollow noopener',
+				}, genEl(token.children, scale, true))];
+			}
+
+			case 'mention': {
+				return [h(EmMention, {
+					key: Math.random(),
+					host: (token.props.host == null && props.author && props.author.host != null ? props.author.host : token.props.host) ?? host,
+					username: token.props.username,
+				})];
+			}
+
+			case 'hashtag': {
+				return [h(EmA, {
+					key: Math.random(),
+					to: isNote ? `/tags/${encodeURIComponent(token.props.hashtag)}` : `/user-tags/${encodeURIComponent(token.props.hashtag)}`,
+					style: 'color:var(--hashtag);',
+				}, `#${token.props.hashtag}`)];
+			}
+
+			case 'blockCode': {
+				return [h(EmCode, {
+					key: Math.random(),
+					code: token.props.code,
+					lang: token.props.lang ?? undefined,
+				})];
+			}
+
+			case 'inlineCode': {
+				return [h(EmCodeInline, {
+					key: Math.random(),
+					code: token.props.code,
+				})];
+			}
+
+			case 'quote': {
+				if (!props.nowrap) {
+					return [h('div', {
+						style: QUOTE_STYLE,
+					}, genEl(token.children, scale, true))];
+				} else {
+					return [h('span', {
+						style: QUOTE_STYLE,
+					}, genEl(token.children, scale, true))];
+				}
+			}
+
+			case 'emojiCode': {
+				if (props.author?.host == null) {
+					return [h(EmCustomEmoji, {
+						key: Math.random(),
+						name: token.props.name,
+						normal: props.plain,
+						host: null,
+						useOriginalSize: scale >= 2.5,
+						menu: props.enableEmojiMenu,
+						menuReaction: props.enableEmojiMenuReaction,
+						fallbackToImage: false,
+					})];
+				} else {
+					// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+					if (props.emojiUrls && (props.emojiUrls[token.props.name] == null)) {
+						return [h('span', `:${token.props.name}:`)];
+					} else {
+						return [h(EmCustomEmoji, {
+							key: Math.random(),
+							name: token.props.name,
+							url: props.emojiUrls && props.emojiUrls[token.props.name],
+							normal: props.plain,
+							host: props.author.host,
+							useOriginalSize: scale >= 2.5,
+						})];
+					}
+				}
+			}
+
+			case 'unicodeEmoji': {
+				return [h(EmEmoji, {
+					key: Math.random(),
+					emoji: token.props.emoji,
+					menu: props.enableEmojiMenu,
+					menuReaction: props.enableEmojiMenuReaction,
+				})];
+			}
+
+			case 'mathInline': {
+				return [h('code', token.props.formula)];
+			}
+
+			case 'mathBlock': {
+				return [h('code', token.props.formula)];
+			}
+
+			case 'search': {
+				return [h(EmGoogle, {
+					key: Math.random(),
+					q: token.props.query,
+				})];
+			}
+
+			case 'plain': {
+				return [h('span', genEl(token.children, scale, true))];
+			}
+
+			default: {
+				// eslint-disable-next-line @typescript-eslint/no-explicit-any
+				console.error('unrecognized ast type:', (token as any).type);
+
+				return [];
+			}
+		}
+	}).flat(Infinity) as (VNode | string)[];
+
+	return h('span', {
+		// https://codeday.me/jp/qa/20190424/690106.html
+		style: props.nowrap ? 'white-space: pre; word-wrap: normal; overflow: hidden; text-overflow: ellipsis;' : 'white-space: pre-wrap;',
+	}, genEl(rootAst, props.rootScale ?? 1));
+}

packages/frontend-embed/src/components/EmNote.vue

@@ -46,14 +46,14 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<EmNoteHeader :note="appearNote" :mini="true"/>
 			<div style="container-type: inline-size;">
 				<p v-if="appearNote.cw != null" :class="$style.cw">
-					<Mfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'respect'"/>
+					<EmMfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'respect'"/>
 					<EmButton rounded full small style="margin: 4px 0;" @click="showContent = !showContent">{{ showContent ? i18n.ts._cw.hide : i18n.ts._cw.show }}</EmButton>
 				</p>
 				<div v-show="appearNote.cw == null || showContent" :class="[{ [$style.contentCollapsed]: collapsed }]">
 					<div :class="$style.text">
 						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 						<EmA v-if="appearNote.replyId" :class="$style.replyIcon" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></EmA>
-						<Mfm
+						<EmMfm
 							v-if="appearNote.text"
 							:parsedNodes="parsed"
 							:text="appearNote.text"
@@ -67,7 +67,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 							<EmLoading v-if="translating" mini/>
 							<div v-else-if="translation">
 								<b>{{ i18n.tsx.translatedFrom({ x: translation.sourceLang }) }}: </b>
-								<Mfm :text="translation.text" :author="appearNote.user" :nyaize="'respect'" :emojiUrls="appearNote.emojis"/>
+								<EmMfm :text="translation.text" :author="appearNote.user" :nyaize="'respect'" :emojiUrls="appearNote.emojis"/>
 							</div>
 						</div>
 					</div>
@@ -120,6 +120,7 @@ import EmNoteSimple from '@/components/EmNoteSimple.vue';
 import EmReactionsViewer from '@/components/EmReactionsViewer.vue';
 import EmMediaList from '@/components/EmMediaList.vue';
 import EmPoll from '@/components/EmPoll.vue';
+import EmMfm from '@/components/EmMfm.js';
 import { userPage } from '@/utils.js';
 import { i18n } from '@/i18n.js';
 import { shouldCollapsed } from '@/to-be-shared/collapsed.js';

packages/frontend-embed/src/components/EmNoteDetailed.vue

@@ -58,13 +58,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</header>
 		<div :class="[$style.noteContent, { [$style.contentCollapsed]: collapsed }]">
 			<p v-if="appearNote.cw != null" :class="$style.cw">
-				<Mfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'respect'"/>
+				<EmMfm v-if="appearNote.cw != ''" style="margin-right: 8px;" :text="appearNote.cw" :author="appearNote.user" :nyaize="'respect'"/>
 				<EmButton rounded full small style="margin: 4px 0;" @click="showContent = !showContent">{{ showContent ? i18n.ts._cw.hide : i18n.ts._cw.show }}</EmButton>
 			</p>
 			<div v-show="appearNote.cw == null || showContent">
 				<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 				<EmA v-if="appearNote.replyId" :class="$style.noteReplyTarget" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></EmA>
-				<Mfm
+				<EmMfm
 					v-if="appearNote.text"
 					:parsedNodes="parsed"
 					:text="appearNote.text"
@@ -142,6 +142,7 @@ import { i18n } from '@/i18n.js';
 import { shouldCollapsed } from '@/to-be-shared/collapsed.js';
 import { instance } from '@/instance.js';
 import { url } from '@/config.js';
+import EmMfm from '@/components/EmMfm.js';
 
 const props = defineProps<{
 	note: Misskey.entities.Note;

packages/frontend-embed/src/components/EmNoteSimple.vue

@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<EmNoteHeader :class="$style.header" :note="note" :mini="true"/>
 		<div>
 			<p v-if="note.cw != null" :class="$style.cw">
-				<Mfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'respect'" :emojiUrls="note.emojis"/>
+				<EmMfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'respect'" :emojiUrls="note.emojis"/>
 				<EmButton rounded full small @click="showContent = !showContent">{{ showContent ? i18n.ts._cw.hide : i18n.ts._cw.show }}</EmButton>
 			</p>
 			<div v-show="note.cw == null || showContent">
@@ -26,6 +26,7 @@ import { ref } from 'vue';
 import * as Misskey from 'misskey-js';
 import EmNoteHeader from '@/components/EmNoteHeader.vue';
 import EmSubNoteContent from '@/components/EmSubNoteContent.vue';
+import EmMfm from '@/components/EmMfm.js';
 
 const props = defineProps<{
 	note: Misskey.entities.Note;

packages/frontend-embed/src/components/EmNoteSub.vue

@@ -12,7 +12,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<EmNoteHeader :class="$style.header" :note="note" :mini="true"/>
 			<div>
 				<p v-if="note.cw != null" :class="$style.cw">
-					<Mfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'respect'"/>
+					<EmMfm v-if="note.cw != ''" style="margin-right: 8px;" :text="note.cw" :author="note.user" :nyaize="'respect'"/>
 					<EmButton rounded full small @click="showContent = !showContent">{{ showContent ? i18n.ts._cw.hide : i18n.ts._cw.show }}</EmButton>
 				</p>
 				<div v-show="note.cw == null || showContent">
@@ -38,6 +38,7 @@ import EmSubNoteContent from '@/components/EmSubNoteContent.vue';
 import { notePage } from '@/utils.js';
 import { misskeyApi } from '@/misskey-api.js';
 import { i18n } from '@/i18n.js';
+import EmMfm from '@/components/EmMfm.js';
 
 const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;

packages/frontend-embed/src/components/EmPoll.vue

@@ -10,7 +10,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<div :class="$style.bg" :style="{ 'width': `${showResult ? (choice.votes / total * 100) : 0}%` }"></div>
 			<span :class="$style.fg">
 				<template v-if="choice.isVoted"><i class="ti ti-check" style="margin-right: 4px; color: var(--accent);"></i></template>
-				<Mfm :text="choice.text" :plain="true"/>
+				<EmMfm :text="choice.text" :plain="true"/>
 				<span v-if="showResult" style="margin-left: 4px; opacity: 0.7;">({{ i18n.tsx._poll.votesCount({ n: choice.votes }) }})</span>
 			</span>
 		</li>
@@ -33,6 +33,7 @@ import type { OpenOnRemoteOptions } from '@/scripts/please-login.js';
 import { i18n } from '@/i18n.js';
 import { host } from '@/config.js';
 import { useInterval } from '@/to-be-shared/use-interval.js';
+import EmMfm from '@/components/EmMfm.js';
 
 function sum(xs: number[]): number {
 	return xs.reduce((a, b) => a + b, 0);

packages/frontend-embed/src/components/EmSubNoteContent.vue

@@ -9,7 +9,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<span v-if="note.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 		<span v-if="note.deletedAt" style="opacity: 0.5">({{ i18n.ts.deletedNote }})</span>
 		<EmA v-if="note.replyId" :class="$style.reply" :to="`/notes/${note.replyId}`"><i class="ti ti-arrow-back-up"></i></EmA>
-		<Mfm v-if="note.text" :text="note.text" :author="note.user" :nyaize="'respect'" :emojiUrls="note.emojis"/>
+		<EmMfm v-if="note.text" :text="note.text" :author="note.user" :nyaize="'respect'" :emojiUrls="note.emojis"/>
 		<EmA v-if="note.renoteId" :class="$style.rp" :to="`/notes/${note.renoteId}`">RN: ...</EmA>
 	</div>
 	<details v-if="note.files && note.files.length > 0">
@@ -36,6 +36,7 @@ import EmMediaList from '@/components/EmMediaList.vue';
 import EmPoll from '@/components/EmPoll.vue';
 import { i18n } from '@/i18n.js';
 import { shouldCollapsed } from '@/to-be-shared/collapsed.js';
+import EmMfm from '@/components/EmMfm.js';
 
 const props = defineProps<{
 	note: Misskey.entities.Note;

packages/frontend-embed/src/components/EmUrl.vue

@@ -0,0 +1,90 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<component
+	:is="self ? 'MkA' : 'a'" ref="el" :class="$style.root" class="_link" :[attr]="self ? props.url.substring(local.length) : props.url" :rel="rel ?? 'nofollow noopener'" :target="target"
+	:behavior="props.navigationBehavior"
+	@contextmenu.stop="() => {}"
+>
+	<template v-if="!self">
+		<span :class="$style.schema">{{ schema }}//</span>
+		<span :class="$style.hostname">{{ hostname }}</span>
+		<span v-if="port != ''">:{{ port }}</span>
+	</template>
+	<template v-if="pathname === '/' && self">
+		<span :class="$style.self">{{ hostname }}</span>
+	</template>
+	<span v-if="pathname != ''" :class="$style.pathname">{{ self ? pathname.substring(1) : pathname }}</span>
+	<span :class="$style.query">{{ query }}</span>
+	<span :class="$style.hash">{{ hash }}</span>
+	<i v-if="target === '_blank'" :class="$style.icon" class="ti ti-external-link"></i>
+</component>
+</template>
+
+<script lang="ts" setup>
+import { defineAsyncComponent, ref } from 'vue';
+import { toUnicode as decodePunycode } from 'punycode/';
+import { url as local } from '@/config.js';
+import { safeURIDecode } from '@/to-be-shared/safe-uri-decode.js';
+
+const props = withDefaults(defineProps<{
+	url: string;
+	rel?: string;
+	showUrlPreview?: boolean;
+	navigationBehavior?: MkABehavior;
+}>(), {
+	showUrlPreview: true,
+});
+
+const self = props.url.startsWith(local);
+const url = new URL(props.url);
+if (!['http:', 'https:'].includes(url.protocol)) throw new Error('invalid url');
+const el = ref();
+
+const schema = url.protocol;
+const hostname = decodePunycode(url.hostname);
+const port = url.port;
+const pathname = safeURIDecode(url.pathname);
+const query = safeURIDecode(url.search);
+const hash = safeURIDecode(url.hash);
+const attr = self ? 'to' : 'href';
+const target = self ? null : '_blank';
+</script>
+
+<style lang="scss" module>
+.root {
+	word-break: break-all;
+}
+
+.icon {
+	padding-left: 2px;
+	font-size: .9em;
+}
+
+.self {
+	font-weight: bold;
+}
+
+.schema {
+	opacity: 0.5;
+}
+
+.hostname {
+	font-weight: bold;
+}
+
+.pathname {
+	opacity: 0.8;
+}
+
+.query {
+	opacity: 0.5;
+}
+
+.hash {
+	font-style: italic;
+}
+</style>

packages/frontend-embed/src/instance.ts

@@ -3,11 +3,13 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { computed, reactive } from 'vue';
-import * as Misskey from 'misskey-js';
 import { misskeyApi } from '@/misskey-api.js';
 
-export const instance = {
-	iconUrl: 'TODO',
-	mediaProxy: 'TODO',
-};
+const providedMetaEl = document.getElementById('misskey_meta');
+
+const _instance = (providedMetaEl && providedMetaEl.textContent) ? JSON.parse(providedMetaEl.textContent) : null;
+
+// NOTE: devモードのときしか _instance が null になることは無い
+export const instance = _instance ?? await misskeyApi('meta', {
+	detail: true,
+});

packages/frontend-embed/src/to-be-shared/nyaize.ts

@@ -0,0 +1,27 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+const enRegex1 = /(?<=n)a/gi;
+const enRegex2 = /(?<=morn)ing/gi;
+const enRegex3 = /(?<=every)one/gi;
+const koRegex1 = /[나-낳]/g;
+const koRegex2 = /(다$)|(다(?=\.))|(다(?= ))|(다(?=!))|(다(?=\?))/gm;
+const koRegex3 = /(야(?=\?))|(야$)|(야(?= ))/gm;
+
+export function nyaize(text: string): string {
+	return text
+		// ja-JP
+		.replaceAll('な', 'にゃ').replaceAll('ナ', 'ニャ').replaceAll('ﾅ', 'ﾆｬ')
+		// en-US
+		.replace(enRegex1, x => x === 'A' ? 'YA' : 'ya')
+		.replace(enRegex2, x => x === 'ING' ? 'YAN' : 'yan')
+		.replace(enRegex3, x => x === 'ONE' ? 'NYAN' : 'nyan')
+		// ko-KR
+		.replace(koRegex1, match => String.fromCharCode(
+			match.charCodeAt(0)! + '냐'.charCodeAt(0) - '나'.charCodeAt(0),
+		))
+		.replace(koRegex2, '다냥')
+		.replace(koRegex3, '냥');
+}

packages/frontend-embed/src/to-be-shared/safe-parse.ts

@@ -0,0 +1,11 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function safeParseFloat(str: unknown): number | null {
+	if (typeof str !== 'string' || str === '') return null;
+	const num = parseFloat(str);
+	if (isNaN(num)) return null;
+	return num;
+}

packages/frontend-embed/src/to-be-shared/safe-uri-decode.ts

@@ -0,0 +1,12 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function safeURIDecode(str: string): string {
+	try {
+		return decodeURIComponent(str);
+	} catch {
+		return str;
+	}
+}