tiny js script that runs listings in the playground

forms.tmpl

@@ -175,6 +175,44 @@
     </div>
   </div>
 #  end for
+<script>
+  // tiny helper that run the code in the playground
+  var els = Array.prototype.slice.call(document.getElementsByClassName("listing"))
+  els.forEach(function(element) {
+    var runDiv = document.createElement("DIV")
+    runDiv.setAttribute("class", "runDiv")
+    var btn = document.createElement("BUTTON")
+    var t = document.createTextNode("Run")
+    var code = element.innerText
+    btn.appendChild(t)
+    btn.onclick = function(){
+      var httpRequest = new XMLHttpRequest();
+      httpRequest.open("POST", "https://play.nim-lang.org/compile", true)
+      function displayContents(e){
+        if (httpRequest.readyState!=httpRequest.DONE){return} 
+        if (httpRequest.status == 200){
+          var res = JSON.parse(httpRequest.responseText)
+          var resDiv = document.createElement("DIV")
+          resDiv.setAttribute("class", "resDiv successComp")
+          if (res.log != "Compilation Failed\u000A"){
+            resDiv.innerHTML = res.log
+          } else {
+            resDiv.innerHTML = res.compileLog
+            resDiv.setAttribute("class","resDiv failedComp")
+          }
+          runDiv.appendChild(resDiv)        
+        } else {
+          console.log("There was a problem with the request.")
+        }
+      }
+      httpRequest.onreadystatechange = displayContents
+      httpRequest.send(JSON.stringify({"code": code, "compilationTarget": "c"}))
+    }
+    runDiv.appendChild(document.createElement("HR"))
+    runDiv.appendChild(btn)
+    element.appendChild(runDiv)
+  }, this);
+</script>
 </div>
 #end proc
 #

public/css/style.css

@@ -711,3 +711,30 @@ blockquote p {
   color: rgb(109, 109, 109) !important;
 
 }
+
+.runDiv > hr {
+  border: 1px solid slategray;
+}
+
+.runDiv > button{
+  cursor: pointer;
+  background-color: lightslategray;
+  text-decoration: none;
+  float: right;
+  color: #FFF;
+  display: block;
+}
+
+.runDiv > .resDiv {
+  width: 80%;
+  margin-left: 1em;
+  padding: 0.2em 1em 0.2em 1em;
+  display: inline-block;
+}
+
+.successComp {
+  color: lightgreen;
+}
+.failedComp {
+  color: lightcoral;
+}