chore: add prismjs for syntax highlighting

1 files changed, 134 insertions, 0 deletions

diff --git a/public/prism/prism-markup-templating.js b/public/prism/prism-markup-templating.js
new file mode 100644
index 0000000..267ca96
--- /dev/null
+++ b/public/prism/prism-markup-templating.js
@@ -0,0 +1,134 @@
+(function (Prism) {
+  /**
+   * Returns the placeholder for the given language id and index.
+   *
+   * @param {string} language
+   * @param {string|number} index
+   * @returns {string}
+   */
+  function getPlaceholder(language, index) {
+    return '___' + language.toUpperCase() + index + '___';
+  }
+
+  Object.defineProperties((Prism.languages['markup-templating'] = {}), {
+    buildPlaceholders: {
+      /**
+       * Tokenize all inline templating expressions matching `placeholderPattern`.
+       *
+       * If `replaceFilter` is provided, only matches of `placeholderPattern` for which `replaceFilter` returns
+       * `true` will be replaced.
+       *
+       * @param {object} env The environment of the `before-tokenize` hook.
+       * @param {string} language The language id.
+       * @param {RegExp} placeholderPattern The matches of this pattern will be replaced by placeholders.
+       * @param {(match: string) => boolean} [replaceFilter]
+       */
+      value: function (env, language, placeholderPattern, replaceFilter) {
+        if (env.language !== language) {
+          return;
+        }
+
+        var tokenStack = (env.tokenStack = []);
+
+        env.code = env.code.replace(placeholderPattern, function (match) {
+          if (typeof replaceFilter === 'function' && !replaceFilter(match)) {
+            return match;
+          }
+          var i = tokenStack.length;
+          var placeholder;
+
+          // Check for existing strings
+          while (
+            env.code.indexOf((placeholder = getPlaceholder(language, i))) !== -1
+          ) {
+            ++i;
+          }
+
+          // Create a sparse array
+          tokenStack[i] = match;
+
+          return placeholder;
+        });
+
+        // Switch the grammar to markup
+        env.grammar = Prism.languages.markup;
+      },
+    },
+    tokenizePlaceholders: {
+      /**
+       * Replace placeholders with proper tokens after tokenizing.
+       *
+       * @param {object} env The environment of the `after-tokenize` hook.
+       * @param {string} language The language id.
+       */
+      value: function (env, language) {
+        if (env.language !== language || !env.tokenStack) {
+          return;
+        }
+
+        // Switch the grammar back
+        env.grammar = Prism.languages[language];
+
+        var j = 0;
+        var keys = Object.keys(env.tokenStack);
+
+        function walkTokens(tokens) {
+          for (var i = 0; i < tokens.length; i++) {
+            // all placeholders are replaced already
+            if (j >= keys.length) {
+              break;
+            }
+
+            var token = tokens[i];
+            if (
+              typeof token === 'string' ||
+              (token.content && typeof token.content === 'string')
+            ) {
+              var k = keys[j];
+              var t = env.tokenStack[k];
+              var s = typeof token === 'string' ? token : token.content;
+              var placeholder = getPlaceholder(language, k);
+
+              var index = s.indexOf(placeholder);
+              if (index > -1) {
+                ++j;
+
+                var before = s.substring(0, index);
+                var middle = new Prism.Token(
+                  language,
+                  Prism.tokenize(t, env.grammar),
+                  'language-' + language,
+                  t
+                );
+                var after = s.substring(index + placeholder.length);
+
+                var replacement = [];
+                if (before) {
+                  replacement.push.apply(replacement, walkTokens([before]));
+                }
+                replacement.push(middle);
+                if (after) {
+                  replacement.push.apply(replacement, walkTokens([after]));
+                }
+
+                if (typeof token === 'string') {
+                  tokens.splice.apply(tokens, [i, 1].concat(replacement));
+                } else {
+                  token.content = replacement;
+                }
+              }
+            } else if (
+              token.content /* && typeof token.content !== 'string' */
+            ) {
+              walkTokens(token.content);
+            }
+          }
+
+          return tokens;
+        }
+
+        walkTokens(env.tokens);
+      },
+    },
+  });
+})(Prism);