[Client] Improve syntax highlighting

Resolve #3926
Resolve #3390

CHANGELOG.md

@@ -7,6 +7,7 @@ unreleased
 * 外部サービス認証情報の配信
 * 管理画面のモデレーションのUIを強化
 * 管理画面からリモートユーザーの情報を更新できるように
+* シンタックスハイライトの強化
 * 引用投稿を削除したとき単なるRenoteとしてタイムラインに残る問題を修正
 * イタリック構文の判定の改善
 * タイトル構文の判定の改善

package.json

@@ -97,8 +97,8 @@
 		"bootstrap-vue": "2.0.0-rc.11",
 		"cafy": "12.0.0",
 		"chai": "4.2.0",
-		"chalk": "2.4.2",
 		"chai-http": "4.2.1",
+		"chalk": "2.4.2",
 		"commander": "2.19.0",
 		"crc-32": "1.2.0",
 		"css-loader": "1.0.1",
@@ -178,6 +178,7 @@
 		"parsimmon": "1.12.0",
 		"portscanner": "2.2.0",
 		"postcss-loader": "3.0.0",
+		"prismjs": "1.15.0",
 		"progress-bar-webpack-plugin": "1.12.0",
 		"promise-any": "0.2.0",
 		"promise-limit": "2.7.0",
@@ -230,6 +231,7 @@
 		"vue-js-modal": "1.3.28",
 		"vue-loader": "15.5.1",
 		"vue-marquee-text-component": "1.1.1",
+		"vue-prism-component": "1.1.1",
 		"vue-router": "3.0.2",
 		"vue-sequential-entrance": "1.1.3",
 		"vue-style-loader": "4.1.2",

src/client/app/common/views/components/code-core.vue

@@ -0,0 +1,30 @@
+<template>
+<prism :inline="inline" :language="lang">{{ code }}</prism>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+import 'prismjs';
+import 'prismjs/themes/prism.css';
+import Prism from 'vue-prism-component';
+
+export default Vue.extend({
+	components: {
+		Prism
+	},
+	props: {
+		code: {
+			type: String,
+			required: true
+		},
+		lang: {
+			type: String,
+			required: false
+		},
+		inline: {
+			type: Boolean,
+			required: false
+		}
+	}
+});
+</script>

src/client/app/common/views/components/code.vue

@@ -0,0 +1,28 @@
+<template>
+<x-code :code="code" :lang="lang" :inline="inline"/>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+
+export default Vue.extend({
+	components: {
+		XCode: () => import('./code-core.vue').then(m => m.default)
+	},
+
+	props: {
+		code: {
+			type: String,
+			required: true
+		},
+		lang: {
+			type: String,
+			required: false
+		},
+		inline: {
+			type: Boolean,
+			required: false
+		}
+	}
+});
+</script>

src/client/app/common/views/components/mfm.ts

@@ -6,8 +6,8 @@ import MkUrl from './url.vue';
 import MkMention from './mention.vue';
 import { concat, sum } from '../../../../../prelude/array';
 import MkFormula from './formula.vue';
+import MkCode from './code.vue';
 import MkGoogle from './google.vue';
-import syntaxHighlight from '../../../../../mfm/syntax-highlight';
 import { host } from '../../../config';
 import { preorderF, countNodesF } from '../../../../../prelude/tree';
 
@@ -170,21 +170,22 @@ export default Vue.component('misskey-flavored-markdown', {
 				}
 
 				case 'blockCode': {
-					return [createElement('pre', {
+					return [createElement(MkCode, {
-						class: 'code'
+						key: Math.random(),
-					}, [
+						props: {
-						createElement('code', {
+							code: token.node.props.code,
-							domProps: {
+							lang: token.node.props.lang,
-								innerHTML: syntaxHighlight(token.node.props.code)
+						}
-							}
+					})];
-						})
-					])];
 				}
 
 				case 'inlineCode': {
-					return [createElement('code', {
+					return [createElement(MkCode, {
-						domProps: {
+						key: Math.random(),
-							innerHTML: syntaxHighlight(token.node.props.code)
+						props: {
+							code: token.node.props.code,
+							lang: token.node.props.lang,
+							inline: true
 						}
 					})];
 				}

src/client/app/common/views/components/misskey-flavored-markdown.vue

@@ -24,25 +24,10 @@ export default Vue.extend({
 		background var(--mfmTitleBg)
 		border-radius 4px
 
-	>>> .code
-		margin 8px 0
-
 	>>> .quote
 		margin 8px
 		padding 6px 0 6px 12px
 		color var(--mfmQuote)
 		border-left solid 3px var(--mfmQuoteLine)
 
-	>>> code
-		padding 4px 8px
-		margin 0 0.5em
-		font-size 90%
-		color #525252
-		background var(--bg)
-		border-radius 2px
-
-	>>> pre > code
-		padding 16px
-		margin 0
-
 </style>

src/mfm/syntax-highlight.ts

@@ -1,343 +0,0 @@
-import { capitalize, toUpperCase } from '../prelude/string';
-
-function escape(text: string) {
-	return text
-		.replace(/>/g, '>')
-		.replace(/</g, '&lt;');
-}
-
-// 文字数が多い順にソートします
-// そうしないと、「function」という文字列が与えられたときに「func」が先にマッチしてしまう可能性があるためです
-const _keywords = [
-	'true',
-	'false',
-	'null',
-	'nil',
-	'undefined',
-	'void',
-	'var',
-	'const',
-	'let',
-	'mut',
-	'dim',
-	'if',
-	'then',
-	'else',
-	'switch',
-	'match',
-	'case',
-	'default',
-	'for',
-	'each',
-	'in',
-	'while',
-	'loop',
-	'continue',
-	'break',
-	'do',
-	'goto',
-	'next',
-	'end',
-	'sub',
-	'throw',
-	'try',
-	'catch',
-	'finally',
-	'enum',
-	'delegate',
-	'function',
-	'func',
-	'fun',
-	'fn',
-	'return',
-	'yield',
-	'async',
-	'await',
-	'require',
-	'include',
-	'import',
-	'imports',
-	'export',
-	'exports',
-	'from',
-	'as',
-	'using',
-	'use',
-	'internal',
-	'module',
-	'namespace',
-	'where',
-	'select',
-	'struct',
-	'union',
-	'new',
-	'delete',
-	'this',
-	'super',
-	'base',
-	'class',
-	'interface',
-	'abstract',
-	'static',
-	'public',
-	'private',
-	'protected',
-	'virtual',
-	'partial',
-	'override',
-	'extends',
-	'implements',
-	'constructor'
-];
-
-const keywords = _keywords
-	.concat(_keywords.map(capitalize))
-	.concat(_keywords.map(toUpperCase))
-	.sort((a, b) => b.length - a.length);
-
-const symbols = [
-	'=',
-	'+',
-	'-',
-	'*',
-	'/',
-	'%',
-	'~',
-	'^',
-	'&',
-	'|',
-	'>',
-	'<',
-	'!',
-	'?'
-];
-
-type Token = {
-	html: string
-	next: number
-};
-
-type Element = (code: string, i: number, source: string) => (Token | null);
-
-const elements: Element[] = [
-	// comment
-	code => {
-		if (code.substr(0, 2) != '//') return null;
-		const match = code.match(/^\/\/(.+?)(\n|$)/);
-		if (!match) return null;
-		const comment = match[0];
-		return {
-			html: `<span class="comment">${escape(comment)}</span>`,
-			next: comment.length
-		};
-	},
-
-	// block comment
-	code => {
-		const match = code.match(/^\/\*([\s\S]+?)\*\//);
-		if (!match) return null;
-		return {
-			html: `<span class="comment">${escape(match[0])}</span>`,
-			next: match[0].length
-		};
-	},
-
-	// string
-	code => {
-		if (!/^['"`]/.test(code)) return null;
-		const begin = code[0];
-		let str = begin;
-		let thisIsNotAString = false;
-		for (let i = 1; i < code.length; i++) {
-			const char = code[i];
-			if (char == '\\') {
-				str += char;
-				str += code[i + 1] || '';
-				i++;
-				continue;
-			} else if (char == begin) {
-				str += char;
-				break;
-			} else if (char == '\n' || i == (code.length - 1)) {
-				thisIsNotAString = true;
-				break;
-			} else {
-				str += char;
-			}
-		}
-		if (thisIsNotAString) {
-			return null;
-		} else {
-			return {
-				html: `<span class="string">${escape(str)}</span>`,
-				next: str.length
-			};
-		}
-	},
-
-	// regexp
-	code => {
-		if (code[0] != '/') return null;
-		let regexp = '';
-		let thisIsNotARegexp = false;
-		for (let i = 1; i < code.length; i++) {
-			const char = code[i];
-			if (char == '\\') {
-				regexp += char;
-				regexp += code[i + 1] || '';
-				i++;
-				continue;
-			} else if (char == '/') {
-				break;
-			} else if (char == '\n' || i == (code.length - 1)) {
-				thisIsNotARegexp = true;
-				break;
-			} else {
-				regexp += char;
-			}
-		}
-
-		if (thisIsNotARegexp) return null;
-		if (regexp == '') return null;
-		if (regexp.startsWith(' ') && regexp.endsWith(' ')) return null;
-
-		return {
-			html: `<span class="regexp">/${escape(regexp)}/</span>`,
-			next: regexp.length + 2
-		};
-	},
-
-	// label
-	code => {
-		if (code[0] != '@') return null;
-		const match = code.match(/^@([a-zA-Z_-]+?)\n/);
-		if (!match) return null;
-		const label = match[0];
-		return {
-			html: `<span class="label">${label}</span>`,
-			next: label.length
-		};
-	},
-
-	// number
-	(code, i, source) => {
-		const prev = source[i - 1];
-		if (prev && /[a-zA-Z]/.test(prev)) return null;
-		if (!/^[\-\+]?[0-9\.]+/.test(code)) return null;
-		const match = code.match(/^[\-\+]?[0-9\.]+/)[0];
-		if (match) {
-			return {
-				html: `<span class="number">${match}</span>`,
-				next: match.length
-			};
-		} else {
-			return null;
-		}
-	},
-
-	// nan
-	(code, i, source) => {
-		const prev = source[i - 1];
-		if (prev && /[a-zA-Z]/.test(prev)) return null;
-		if (code.substr(0, 3) == 'NaN') {
-			return {
-				html: `<span class="nan">NaN</span>`,
-				next: 3
-			};
-		} else {
-			return null;
-		}
-	},
-
-	// method
-	code => {
-		const match = code.match(/^([a-zA-Z_-]+?)\(/);
-		if (!match) return null;
-
-		if (match[1] == '-') return null;
-
-		return {
-			html: `<span class="method">${match[1]}</span>`,
-			next: match[1].length
-		};
-	},
-
-	// property
-	(code, i, source) => {
-		const prev = source[i - 1];
-		if (prev != '.') return null;
-
-		const match = code.match(/^[a-zA-Z0-9_-]+/);
-		if (!match) return null;
-
-		return {
-			html: `<span class="property">${match[0]}</span>`,
-			next: match[0].length
-		};
-	},
-
-	// keyword
-	(code, i, source) => {
-		const prev = source[i - 1];
-		if (prev && /[a-zA-Z]/.test(prev)) return null;
-
-		const match = keywords.filter(k => code.substr(0, k.length) == k)[0];
-		if (match) {
-			if (/^[a-zA-Z]/.test(code.substr(match.length))) return null;
-			return {
-				html: `<span class="keyword ${match}">${match}</span>`,
-				next: match.length
-			};
-		} else {
-			return null;
-		}
-	},
-
-	// symbol
-	code => {
-		const match = symbols.filter(s => code[0] == s)[0];
-		if (match) {
-			return {
-				html: `<span class="symbol">${match}</span>`,
-				next: 1
-			};
-		} else {
-			return null;
-		}
-	}
-];
-
-// TODO: specify lang
-export default (source: string, lang?: string): string => {
-	let code = source;
-	let html = '';
-
-	let i = 0;
-
-	function push(token: Token) {
-		html += token.html;
-		code = code.substr(token.next);
-		i += token.next;
-	}
-
-	while (code != '') {
-		const parsed = elements.some(el => {
-			const e = el(code, i, source);
-			if (e) {
-				push(e);
-				return true;
-			} else {
-				return false;
-			}
-		});
-
-		if (!parsed) {
-			push({
-				html: escape(code[0]),
-				next: 1
-			});
-		}
-	}
-
-	return html;
-};