chore: add prismjs for syntax highlighting

1 files changed, 86 insertions, 0 deletions

diff --git a/public/prism/prism-dot.js b/public/prism/prism-dot.js
new file mode 100644
index 0000000..c6cd170
--- /dev/null
+++ b/public/prism/prism-dot.js
@@ -0,0 +1,86 @@
+// https://www.graphviz.org/doc/info/lang.html
+
+(function (Prism) {
+  var ID =
+    '(?:' +
+    [
+      // an identifier
+      /[a-zA-Z_\x80-\uFFFF][\w\x80-\uFFFF]*/.source,
+      // a number
+      /-?(?:\.\d+|\d+(?:\.\d*)?)/.source,
+      // a double-quoted string
+      /"[^"\\]*(?:\\[\s\S][^"\\]*)*"/.source,
+      // HTML-like string
+      /<(?:[^<>]|(?!<!--)<(?:[^<>"']|"[^"]*"|'[^']*')+>|<!--(?:[^-]|-(?!->))*-->)*>/
+        .source,
+    ].join('|') +
+    ')';
+
+  var IDInside = {
+    markup: {
+      pattern: /(^<)[\s\S]+(?=>$)/,
+      lookbehind: true,
+      alias: ['language-markup', 'language-html', 'language-xml'],
+      inside: Prism.languages.markup,
+    },
+  };
+
+  /**
+   * @param {string} source
+   * @param {string} flags
+   * @returns {RegExp}
+   */
+  function withID(source, flags) {
+    return RegExp(
+      source.replace(/<ID>/g, function () {
+        return ID;
+      }),
+      flags
+    );
+  }
+
+  Prism.languages.dot = {
+    comment: {
+      pattern: /\/\/.*|\/\*[\s\S]*?\*\/|^#.*/m,
+      greedy: true,
+    },
+    'graph-name': {
+      pattern: withID(
+        /(\b(?:digraph|graph|subgraph)[ \t\r\n]+)<ID>/.source,
+        'i'
+      ),
+      lookbehind: true,
+      greedy: true,
+      alias: 'class-name',
+      inside: IDInside,
+    },
+    'attr-value': {
+      pattern: withID(/(=[ \t\r\n]*)<ID>/.source),
+      lookbehind: true,
+      greedy: true,
+      inside: IDInside,
+    },
+    'attr-name': {
+      pattern: withID(/([\[;, \t\r\n])<ID>(?=[ \t\r\n]*=)/.source),
+      lookbehind: true,
+      greedy: true,
+      inside: IDInside,
+    },
+    keyword: /\b(?:digraph|edge|graph|node|strict|subgraph)\b/i,
+    'compass-point': {
+      pattern: /(:[ \t\r\n]*)(?:[ewc_]|[ns][ew]?)(?![\w\x80-\uFFFF])/,
+      lookbehind: true,
+      alias: 'builtin',
+    },
+    node: {
+      pattern: withID(/(^|[^-.\w\x80-\uFFFF\\])<ID>/.source),
+      lookbehind: true,
+      greedy: true,
+      inside: IDInside,
+    },
+    operator: /[=:]|-[->]/,
+    punctuation: /[\[\]{};,]/,
+  };
+
+  Prism.languages.gv = Prism.languages.dot;
+})(Prism);