go.talks/present: hacks for 'inside present' talk

present/static/playground.js

Index: present/static/playground.js 
=================================================================== 
--- a/present/static/playground.js 
+++ b/present/static/playground.js 
@@ -5,6 +5,8 @@ 
 (function() { 
 "use strict"; 
 
+ var wire = document.getElementById('wire'); 
+ 
 var websocket, outputs = {}; 
 
 function showMessage(o, m, className) { 
@@ -17,6 +19,7 @@ 
 } 
 
 function onMessage(e) { 
+ if (wire) wire.innerHTML += '<div class="recv">'+e.data+'</div>'; 
 var m = JSON.parse(e.data); 
 var o = outputs[m.Id]; 
 if (o === null) { 
@@ -42,7 +45,9 @@ 
 } 
 
 function sendMessage(m) { 
- websocket.send(JSON.stringify(m)); 
+ var s = JSON.stringify(m) 
+ if (wire) wire.innerHTML += '<div class="send">'+s+'</div>'; 
+ websocket.send(s); 
 } 
 
 var count = 0; 
@@ -74,6 +79,7 @@ 
 var outpre = document.createElement('pre'); 
 
 function onRun() { 
+ if (wire) wire.innerHTML = ""; 
 outpre.innerHTML = ""; 
 output.style.display = "block"; 
 sendMessage({Id: id, Kind: "run", Body: text(code)});