perf(frontend): ノート表示時のMFMパース処理を減らす

packages/frontend/src/components/MkNote.vue

@@ -60,7 +60,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<div :class="$style.text">
 						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 						<MkA v-if="appearNote.replyId" :class="$style.replyIcon" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
-						<Mfm v-if="appearNote.text" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
+						<Mfm v-if="appearNote.text" :parsedNodes="parsed" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
 						<div v-if="translating || translation" :class="$style.translation">
 							<MkLoading v-if="translating" mini/>
 							<div v-else>
@@ -209,8 +209,9 @@ const clipButton = shallowRef<HTMLElement>();
 let appearNote = $computed(() => isRenote ? note.renote as Misskey.entities.Note : note);
 const isMyRenote = $i && ($i.id === note.userId);
 const showContent = ref(false);
-const urls = appearNote.text ? extractUrlFromMfm(mfm.parse(appearNote.text)) : null;
+const parsed = appearNote.text ? mfm.parse(appearNote.text) : null;
-const isLong = shouldCollapsed(appearNote);
+const urls = parsed ? extractUrlFromMfm(parsed) : null;
+const isLong = shouldCollapsed(appearNote, urls ?? []);
 const collapsed = ref(appearNote.cw == null && isLong);
 const isDeleted = ref(false);
 const muted = ref($i ? checkWordMute(appearNote, $i, $i.mutedWords) : false);

packages/frontend/src/components/MkNoteDetailed.vue

@@ -73,7 +73,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<div v-show="appearNote.cw == null || showContent">
 				<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 				<MkA v-if="appearNote.replyId" :class="$style.noteReplyTarget" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
-				<Mfm v-if="appearNote.text" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
+				<Mfm v-if="appearNote.text" :parsedNodes="parsed" :text="appearNote.text" :author="appearNote.user" :nyaize="'account'" :i="$i" :emojiUrls="appearNote.emojis"/>
 				<a v-if="appearNote.renote != null" :class="$style.rn">RN:</a>
 				<div v-if="translating || translation" :class="$style.translation">
 					<MkLoading v-if="translating" mini/>
@@ -260,7 +260,8 @@ const isDeleted = ref(false);
 const muted = ref($i ? checkWordMute(appearNote, $i, $i.mutedWords) : false);
 const translation = ref(null);
 const translating = ref(false);
-const urls = appearNote.text ? extractUrlFromMfm(mfm.parse(appearNote.text)) : null;
+const parsed = appearNote.text ? mfm.parse(appearNote.text) : null;
+const urls = parsed ? extractUrlFromMfm(parsed) : null;
 const showTicker = (defaultStore.state.instanceTicker === 'always') || (defaultStore.state.instanceTicker === 'remote' && appearNote.user.instance);
 const conversation = ref<Misskey.entities.Note[]>([]);
 const replies = ref<Misskey.entities.Note[]>([]);

packages/frontend/src/components/MkSubNoteContent.vue

@@ -42,7 +42,7 @@ const props = defineProps<{
 	note: Misskey.entities.Note;
 }>();
 
-const isLong = shouldCollapsed(props.note);
+const isLong = shouldCollapsed(props.note, []);
 
 const collapsed = $ref(isLong);
 </script>

packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts

@@ -38,6 +38,7 @@ type MfmProps = {
 	emojiUrls?: string[];
 	rootScale?: number;
 	nyaize: boolean | 'account';
+	parsedNodes?: mfm.MfmNode[] | null;
 };
 
 // eslint-disable-next-line import/no-default-export
@@ -48,7 +49,7 @@ export default function(props: MfmProps) {
 	// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
 	if (props.text == null || props.text === '') return;
 
-	const rootAst = (props.plain ? mfm.parseSimple : mfm.parse)(props.text);
+	const rootAst = props.parsedNodes ?? (props.plain ? mfm.parseSimple : mfm.parse)(props.text);
 
 	const validTime = (t: string | null | undefined) => {
 		if (t == null) return null;

packages/frontend/src/scripts/collapsed.ts

@@ -3,12 +3,9 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import * as mfm from 'mfm-js';
 import * as Misskey from 'misskey-js';
-import { extractUrlFromMfm } from './extract-url-from-mfm.js';
 
-export function shouldCollapsed(note: Misskey.entities.Note): boolean {
+export function shouldCollapsed(note: Misskey.entities.Note, urls: string[]): boolean {
-	const urls = note.text ? extractUrlFromMfm(mfm.parse(note.text)) : null;
 	const collapsed = note.cw == null && note.text != null && (
 		(note.text.includes('$[x2')) ||
 		(note.text.includes('$[x3')) ||
@@ -17,7 +14,7 @@ export function shouldCollapsed(note: Misskey.entities.Note): boolean {
 		(note.text.split('\n').length > 9) ||
 		(note.text.length > 500) ||
 		(note.files.length >= 5) ||
-		(!!urls && urls.length >= 4)
+		(urls.length >= 4)
 	);
 
 	return collapsed;