Scaladoc/hide snippets comments

scaladoc-js/resources/scaladoc-searchbar.css

@@ -100,5 +100,10 @@
 
 .pull-right {
     float: right;
-    margin-left: auto
+    margin-left: auto;
+}
+
+.hide-snippet-comments-button {
+    position: absolute;
+    left: 90%;
 }

scaladoc-js/src/Main.scala

@@ -3,4 +3,5 @@ package dotty.tools.scaladoc
 object Main extends App {
   Searchbar()
   SocialLinks()
+  CodeSnippets()
 }

scaladoc-js/src/searchbar/code-snippets/CodeSnippets.scala

@@ -0,0 +1,37 @@
+package dotty.tools.scaladoc
+
+import org.scalajs.dom._
+import org.scalajs.dom.ext._
+
+class CodeSnippets:
+  val replacePatternsAndResults: Seq[(String, String)] = Seq(
+    """(\/\/{{\n)((.|\n)*?)(\/\/}}\n)""" -> """<span class="hideable">$2</span>""", // wrap content of block directives
+    """(\/\/.*?)(\n|\$)""" -> """<span class="hideable">$1</span>$2""", // wrap single line comment
+    """(\/\*)((.|\n)*?)(\*\/)""" -> """<span class="hideable">$0</span>""", // wrap multi line comment
+  )
+
+  document.querySelectorAll("code").foreach {
+    case e: html.Element => e.innerHTML = replacePatternsAndResults.foldLeft(e.innerHTML) {
+      case (acc, (pattern, result)) =>
+        acc.replaceAll(pattern, result)
+    }
+  }
+
+  def toggleHide(e: html.Element | html.Document) = e.querySelectorAll("code span.hideable").foreach {
+    case e: html.Element if e.style.getPropertyValue("display").isEmpty => e.style.setProperty("display", "none")
+    case e: html.Element => e.style.removeProperty("display")
+  }
+
+  toggleHide(document)
+
+  document.querySelectorAll("pre").foreach {
+    case e: html.Element =>
+      val a = document.createElement("a")
+      a.textContent = "Show"
+      a.addEventListener("click", { (_: MouseEvent) =>
+        a.textContent = if a.textContent == "Show" then "Hide" else "Show"
+        toggleHide(e)
+      })
+      a.classList.add("hide-snippet-comments-button")
+      e.insertBefore(a, e.firstChild)
+  }

scaladoc-testcases/src/tests/snippetComments.scala

@@ -0,0 +1,31 @@
+package tests.snippetComments
+
+
+/**
+ * This is my codeblock
+ * 
+ * ```
+ * //{{
+ * import xd
+ * import xd2
+ * //}}
+ *
+ *
+ * val x = 1 // This is my valid comment
+ *
+ * /*
+ *  multi line comment
+ *  */
+ *
+ * val y = 2 // comment in the same line
+ * // comment in new line
+ * val z = 3
+ * 
+ * //{{
+ * val hideMe = 7
+ * //}}
+ * ```
+ *
+ * The end of my codeblock
+ */
+class A