From a98b5ea6fe8e8cc98a55e0fd793e6e8660ea31c1 Mon Sep 17 00:00:00 2001
From: Armand Philippot <git@armandphilippot.com>
Date: Thu, 30 Dec 2021 19:47:21 +0100
Subject: chore: add prismjs for syntax highlighting

---
 public/prism/prism-regex.js | 104 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 public/prism/prism-regex.js

(limited to 'public/prism/prism-regex.js')

diff --git a/public/prism/prism-regex.js b/public/prism/prism-regex.js
new file mode 100644
index 0000000..19fbcca
--- /dev/null
+++ b/public/prism/prism-regex.js
@@ -0,0 +1,104 @@
+(function (Prism) {
+  var specialEscape = {
+    pattern: /\\[\\(){}[\]^$+*?|.]/,
+    alias: 'escape',
+  };
+  var escape =
+    /\\(?:x[\da-fA-F]{2}|u[\da-fA-F]{4}|u\{[\da-fA-F]+\}|0[0-7]{0,2}|[123][0-7]{2}|c[a-zA-Z]|.)/;
+  var charSet = {
+    pattern: /\.|\\[wsd]|\\p\{[^{}]+\}/i,
+    alias: 'class-name',
+  };
+  var charSetWithoutDot = {
+    pattern: /\\[wsd]|\\p\{[^{}]+\}/i,
+    alias: 'class-name',
+  };
+
+  var rangeChar = '(?:[^\\\\-]|' + escape.source + ')';
+  var range = RegExp(rangeChar + '-' + rangeChar);
+
+  // the name of a capturing group
+  var groupName = {
+    pattern: /(<|')[^<>']+(?=[>']$)/,
+    lookbehind: true,
+    alias: 'variable',
+  };
+
+  Prism.languages.regex = {
+    'char-class': {
+      pattern: /((?:^|[^\\])(?:\\\\)*)\[(?:[^\\\]]|\\[\s\S])*\]/,
+      lookbehind: true,
+      inside: {
+        'char-class-negation': {
+          pattern: /(^\[)\^/,
+          lookbehind: true,
+          alias: 'operator',
+        },
+        'char-class-punctuation': {
+          pattern: /^\[|\]$/,
+          alias: 'punctuation',
+        },
+        range: {
+          pattern: range,
+          inside: {
+            escape: escape,
+            'range-punctuation': {
+              pattern: /-/,
+              alias: 'operator',
+            },
+          },
+        },
+        'special-escape': specialEscape,
+        'char-set': charSetWithoutDot,
+        escape: escape,
+      },
+    },
+    'special-escape': specialEscape,
+    'char-set': charSet,
+    backreference: [
+      {
+        // a backreference which is not an octal escape
+        pattern: /\\(?![123][0-7]{2})[1-9]/,
+        alias: 'keyword',
+      },
+      {
+        pattern: /\\k<[^<>']+>/,
+        alias: 'keyword',
+        inside: {
+          'group-name': groupName,
+        },
+      },
+    ],
+    anchor: {
+      pattern: /[$^]|\\[ABbGZz]/,
+      alias: 'function',
+    },
+    escape: escape,
+    group: [
+      {
+        // https://docs.oracle.com/javase/10/docs/api/java/util/regex/Pattern.html
+        // https://docs.microsoft.com/en-us/dotnet/standard/base-types/regular-expression-language-quick-reference?view=netframework-4.7.2#grouping-constructs
+
+        // (), (?<name>), (?'name'), (?>), (?:), (?=), (?!), (?<=), (?<!), (?is-m), (?i-m:)
+        pattern:
+          /\((?:\?(?:<[^<>']+>|'[^<>']+'|[>:]|<?[=!]|[idmnsuxU]+(?:-[idmnsuxU]+)?:?))?/,
+        alias: 'punctuation',
+        inside: {
+          'group-name': groupName,
+        },
+      },
+      {
+        pattern: /\)/,
+        alias: 'punctuation',
+      },
+    ],
+    quantifier: {
+      pattern: /(?:[+*?]|\{\d+(?:,\d*)?\})[?+]?/,
+      alias: 'number',
+    },
+    alternation: {
+      pattern: /\|/,
+      alias: 'keyword',
+    },
+  };
+})(Prism);
-- 
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