Locally add prismjs

node_modules/prismjs/plugins/diff-highlight/prism-diff-highlight.js

@@ -0,0 +1,90 @@
+(function () {
+
+	if (typeof Prism === 'undefined') {
+		return;
+	}
+
+
+	var LANGUAGE_REGEX = /^diff-([\w-]+)/i;
+	var HTML_TAG = /<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/g;
+	//this will match a line plus the line break while ignoring the line breaks HTML tags may contain.
+	var HTML_LINE = RegExp(/(?:__|[^\r\n<])*(?:\r\n?|\n|(?:__|[^\r\n<])(?![^\r\n]))/.source.replace(/__/g, function () { return HTML_TAG.source; }), 'gi');
+
+	var warningLogged = false;
+
+	Prism.hooks.add('before-sanity-check', function (env) {
+		var lang = env.language;
+		if (LANGUAGE_REGEX.test(lang) && !env.grammar) {
+			env.grammar = Prism.languages[lang] = Prism.languages.diff;
+		}
+	});
+	Prism.hooks.add('before-tokenize', function (env) {
+		if (!warningLogged && !Prism.languages.diff && !Prism.plugins.autoloader) {
+			warningLogged = true;
+			console.warn("Prism's Diff Highlight plugin requires the Diff language definition (prism-diff.js)." +
+				"Make sure the language definition is loaded or use Prism's Autoloader plugin.");
+		}
+
+		var lang = env.language;
+		if (LANGUAGE_REGEX.test(lang) && !Prism.languages[lang]) {
+			Prism.languages[lang] = Prism.languages.diff;
+		}
+	});
+
+	Prism.hooks.add('wrap', function (env) {
+		var diffLanguage; var diffGrammar;
+
+		if (env.language !== 'diff') {
+			var langMatch = LANGUAGE_REGEX.exec(env.language);
+			if (!langMatch) {
+				return; // not a language specific diff
+			}
+
+			diffLanguage = langMatch[1];
+			diffGrammar = Prism.languages[diffLanguage];
+		}
+
+		var PREFIXES = Prism.languages.diff && Prism.languages.diff.PREFIXES;
+
+		// one of the diff tokens without any nested tokens
+		if (PREFIXES && env.type in PREFIXES) {
+			/** @type {string} */
+			var content = env.content.replace(HTML_TAG, ''); // remove all HTML tags
+
+			/** @type {string} */
+			var decoded = content.replace(/&lt;/g, '<').replace(/&amp;/g, '&');
+
+			// remove any one-character prefix
+			var code = decoded.replace(/(^|[\r\n])./g, '$1');
+
+			// highlight, if possible
+			var highlighted;
+			if (diffGrammar) {
+				highlighted = Prism.highlight(code, diffGrammar, diffLanguage);
+			} else {
+				highlighted = Prism.util.encode(code);
+			}
+
+			// get the HTML source of the prefix token
+			var prefixToken = new Prism.Token('prefix', PREFIXES[env.type], [/\w+/.exec(env.type)[0]]);
+			var prefix = Prism.Token.stringify(prefixToken, env.language);
+
+			// add prefix
+			var lines = []; var m;
+			HTML_LINE.lastIndex = 0;
+			while ((m = HTML_LINE.exec(highlighted))) {
+				lines.push(prefix + m[0]);
+			}
+			if (/(?:^|[\r\n]).$/.test(decoded)) {
+				// because both "+a\n+" and "+a\n" will map to "a\n" after the line prefixes are removed
+				lines.push(prefix);
+			}
+			env.content = lines.join('');
+
+			if (diffGrammar) {
+				env.classes.push('language-' + diffLanguage);
+			}
+		}
+	});
+
+}());