Improve MFM

MFMの構文を調整 + 新しいアニメーション追加
Resolve #6816

3 files changed, 31 insertions, 111 deletions

diff --git a/src/mfm/language.ts b/src/mfm/language.ts
index 61d6422558..8e15ca43b9 100644
--- a/src/mfm/language.ts
+++ b/src/mfm/language.ts
@@ -23,7 +23,6 @@ export const mfmLanguage = P.createLanguage({
 	root: r => P.alt(r.block, r.inline).atLeast(1),
 	plain: r => P.alt(r.emoji, r.text).atLeast(1),
 	block: r => P.alt(
-		r.title,
 		r.quote,
 		r.search,
 		r.blockCode,
@@ -37,14 +36,6 @@ export const mfmLanguage = P.createLanguage({
 			return P.makeFailure(i, 'not newline');
 		}
 	}),
-	title: r => r.startOfLine.then(P((input, i) => {
-		const text = input.substr(i);
-		const match = text.match(/^([【\[]([^【\[】\]\n]+?)[】\]])(\n|$)/);
-		if (!match) return P.makeFailure(i, 'not a title');
-		const q = match[2].trim();
-		const contents = r.inline.atLeast(1).tryParse(q);
-		return P.makeSuccess(i + match[0].length, createTree('title', contents, {}));
-	})),
 	quote: r => r.startOfLine.then(P((input, i) => {
 		const text = input.substr(i);
 		if (!text.match(/^>[\s\S]+?/)) return P.makeFailure(i, 'not a quote');
@@ -67,17 +58,10 @@ export const mfmLanguage = P.createLanguage({
 		return P.makeSuccess(i + match[0].length, createLeaf('blockCode', { code: match[2], lang: match[1] ? match[1].trim() : null }));
 	})),
 	inline: r => P.alt(
-		r.big,
 		r.bold,
 		r.small,
 		r.italic,
 		r.strike,
-		r.motion,
-		r.spin,
-		r.jump,
-		r.flip,
-		r.twitch,
-		r.shake,
 		r.inlineCode,
 		r.mathInline,
 		r.mention,
@@ -85,9 +69,9 @@ export const mfmLanguage = P.createLanguage({
 		r.url,
 		r.link,
 		r.emoji,
+		r.fn,
 		r.text
 	),
-	big: r => P.regexp(/^\*\*\*([\s\S]+?)\*\*\*/, 1).map(x => createTree('big', r.inline.atLeast(1).tryParse(x), {})),
 	bold: r => {
 		const asterisk = P.regexp(/\*\*([\s\S]+?)\*\*/, 1);
 		const underscore = P.regexp(/__([a-zA-Z0-9\s]+?)__/, 1);
@@ -107,25 +91,6 @@ export const mfmLanguage = P.createLanguage({
 		return P.alt(xml, underscore).map(x => createTree('italic', r.inline.atLeast(1).tryParse(x), {}));
 	},
 	strike: r => P.regexp(/~~([^\n~]+?)~~/, 1).map(x => createTree('strike', r.inline.atLeast(1).tryParse(x), {})),
-	motion: r => {
-		const paren = P.regexp(/\(\(\(([\s\S]+?)\)\)\)/, 1);
-		const xml = P.regexp(/<motion>(.+?)<\/motion>/, 1);
-		return P.alt(paren, xml).map(x => createTree('motion', r.inline.atLeast(1).tryParse(x), {}));
-	},
-	spin: r => {
-		return P((input, i) => {
-			const text = input.substr(i);
-			const match = text.match(/^<spin(\s[a-z]+?)?>(.+?)<\/spin>/i);
-			if (!match) return P.makeFailure(i, 'not a spin');
-			return P.makeSuccess(i + match[0].length, {
-				content: match[2], attr: match[1] ? match[1].trim() : null
-			});
-		}).map(x => createTree('spin', r.inline.atLeast(1).tryParse(x.content), { attr: x.attr }));
-	},
-	jump: r => P.regexp(/<jump>(.+?)<\/jump>/, 1).map(x => createTree('jump', r.inline.atLeast(1).tryParse(x), {})),
-	flip: r => P.regexp(/<flip>(.+?)<\/flip>/, 1).map(x => createTree('flip', r.inline.atLeast(1).tryParse(x), {})),
-	twitch: r => P.regexp(/<twitch>(.+?)<\/twitch>/, 1).map(x => createTree('twitch', r.inline.atLeast(1).tryParse(x), {})),
-	shake: r => P.regexp(/<shake>(.+?)<\/shake>/, 1).map(x => createTree('shake', r.inline.atLeast(1).tryParse(x), {})),
 	center: r => r.startOfLine.then(P.regexp(/<center>([\s\S]+?)<\/center>/, 1).map(x => createTree('center', r.inline.atLeast(1).tryParse(x), {}))),
 	inlineCode: () => P.regexp(/`([^´\n]+?)`/, 1).map(x => createLeaf('inlineCode', { code: x })),
 	mathBlock: r => r.startOfLine.then(P.regexp(/\\\[([\s\S]+?)\\\]/, 1).map(x => createLeaf('mathBlock', { formula: x.trim() }))),
@@ -192,5 +157,29 @@ export const mfmLanguage = P.createLanguage({
 		const code = P.regexp(emojiRegex).map(x => createLeaf('emoji', { emoji: x }));
 		return P.alt(name, code);
 	},
+	fn: r => {
+		return P.seqObj(
+			P.string('['), ['fn', P.regexp(/[^\s\n\[\]]+/)] as any, P.string(' '), P.optWhitespace, ['text', P.regexp(/[^\n\[\]]+/)] as any, P.string(']'),
+		).map((x: any) => {
+			let name = x.fn;
+			const args = {};
+			const separator = x.fn.indexOf('.');
+			if (separator > -1) {
+				name = x.fn.substr(0, separator);
+				for (const arg of x.fn.substr(separator + 1).split(',')) {
+					const kv = arg.split('=');
+					if (kv.length === 1) {
+						args[kv[0]] = true;
+					} else {
+						args[kv[0]] = kv[1];
+					}
+				}
+			}
+			return createTree('fn', r.inline.atLeast(1).tryParse(x.text), {
+				name,
+				args
+			});
+		});
+	},
 	text: () => P.any.map(x => createLeaf('text', { text: x }))
 });
diff --git a/src/mfm/to-html.ts b/src/mfm/to-html.ts
index 36680e374e..ab3f7c3d16 100644
--- a/src/mfm/to-html.ts
+++ b/src/mfm/to-html.ts
@@ -25,12 +25,6 @@ export function toHtml(tokens: MfmForest | null, mentionedRemoteUsers: IMentione
 			return el;
 		},
 
-		big(token) {
-			const el = doc.createElement('strong');
-			appendChildren(token.children, el);
-			return el;
-		},
-
 		small(token) {
 			const el = doc.createElement('small');
 			appendChildren(token.children, el);
@@ -49,42 +43,12 @@ export function toHtml(tokens: MfmForest | null, mentionedRemoteUsers: IMentione
 			return el;
 		},
 
-		motion(token) {
-			const el = doc.createElement('i');
-			appendChildren(token.children, el);
-			return el;
-		},
-
-		spin(token) {
+		fn(token) {
 			const el = doc.createElement('i');
 			appendChildren(token.children, el);
 			return el;
 		},
 
-		jump(token) {
-			const el = doc.createElement('i');
-			appendChildren(token.children, el);
-			return el;
-		},
-
-		twitch(token) {
-			const el = doc.createElement('i');
-			appendChildren(token.children, el);
-			return el;
-		},
-
-		shake(token) {
-			const el = doc.createElement('i');
-			appendChildren(token.children, el);
-			return el;
-		},
-
-		flip(token) {
-			const el = doc.createElement('span');
-			appendChildren(token.children, el);
-			return el;
-		},
-
 		blockCode(token) {
 			const pre = doc.createElement('pre');
 			const inner = doc.createElement('code');
@@ -157,12 +121,6 @@ export function toHtml(tokens: MfmForest | null, mentionedRemoteUsers: IMentione
 			return el;
 		},
 
-		title(token) {
-			const el = doc.createElement('h1');
-			appendChildren(token.children, el);
-			return el;
-		},
-
 		text(token) {
 			const el = doc.createElement('span');
 			const nodes = (token.node.props.text as string).split(/\r\n|\r|\n/).map(x => doc.createTextNode(x) as Node);
diff --git a/src/mfm/to-string.ts b/src/mfm/to-string.ts
index 6b8dcf2c39..b70b99cbda 100644
--- a/src/mfm/to-string.ts
+++ b/src/mfm/to-string.ts
@@ -18,10 +18,6 @@ export function toString(tokens: MfmForest | null, opts?: RestoreOptions): strin
 			return `**${appendChildren(token.children, opts)}**`;
 		},
 
-		big(token, opts) {
-			return `***${appendChildren(token.children, opts)}***`;
-		},
-
 		small(token, opts) {
 			return `<small>${appendChildren(token.children, opts)}</small>`;
 		},
@@ -34,30 +30,11 @@ export function toString(tokens: MfmForest | null, opts?: RestoreOptions): strin
 			return `<i>${appendChildren(token.children, opts)}</i>`;
 		},
 
-		motion(token, opts) {
-			return `<motion>${appendChildren(token.children, opts)}</motion>`;
-		},
-
-		spin(token, opts) {
-			const attr = token.node.props?.attr;
-			const post = attr ? ` ${attr}` : '';
-			return `<spin${post}>${appendChildren(token.children, opts)}</spin>`;
-		},
-
-		jump(token, opts) {
-			return `<jump>${appendChildren(token.children, opts)}</jump>`;
-		},
-
-		twitch(token, opts) {
-			return `<twitch>${appendChildren(token.children, opts)}</twitch>`;
-		},
-
-		shake(token, opts) {
-			return `<shake>${appendChildren(token.children, opts)}</shake>`;
-		},
-
-		flip(token, opts) {
-			return `<flip>${appendChildren(token.children, opts)}</flip>`;
+		fn(token, opts) {
+			const name = token.node.props?.name;
+			const args = token.node.props?.args || {};
+			const argsStr = Object.entries(args).map(([k, v]) => v === true ? k : `${k}=${v}`).join(',');
+			return `[${name}${argsStr !== '' ? '.' + argsStr : ''} ${appendChildren(token.children, opts)}]`;
 		},
 
 		blockCode(token) {
@@ -104,10 +81,6 @@ export function toString(tokens: MfmForest | null, opts?: RestoreOptions): strin
 			return `${appendChildren(token.children, {doNyaize: false}).replace(/^/gm,'>').trim()}\n`;
 		},
 
-		title(token, opts) {
-			return `[${appendChildren(token.children, opts)}]\n`;
-		},
-
 		text(token, opts) {
 			return (opts && opts.doNyaize) ? nyaize(token.node.props.text) : token.node.props.text;
 		},