Websocket refactoring (#190)

Websocket refactoring

docs/assets/vendor/highlight.js/lib/html_renderer.js

@@ -0,0 +1,46 @@
+import { escapeHTML } from './utils';
+
+const SPAN_CLOSE = '</span>';
+const emitsWrappingTags = (node) => {
+  return !!node.kind;
+};
+
+export default class HTMLRenderer {
+  constructor(tree, options) {
+    this.buffer = "";
+    this.classPrefix = options.classPrefix;
+    tree.walk(this);
+  }
+
+  // renderer API
+
+  addText(text) {
+    this.buffer += escapeHTML(text);
+  }
+
+  openNode(node) {
+    if (!emitsWrappingTags(node)) return;
+
+    let className = node.kind;
+    if (!node.sublanguage) {
+      className = `${this.classPrefix}${className}`;
+    }
+    this.span(className);
+  }
+
+  closeNode(node) {
+    if (!emitsWrappingTags(node)) return;
+
+    this.buffer += SPAN_CLOSE;
+  }
+
+  // helpers
+
+  span(className) {
+    this.buffer += `<span class="${className}">`;
+  }
+
+  value() {
+    return this.buffer;
+  }
+}