Adds an IPython kernel running in NaCl, and a wrapper as a Chrome extension.

ports/ipython_extension/background.js

Index: ports/ipython_extension/background.js
diff --git a/ports/ipython_extension/background.js b/ports/ipython_extension/background.js
new file mode 100644
index 0000000000000000000000000000000000000000..98bab105de2fc982e8c5c8a5a4062cb3a4b07a95
--- /dev/null
+++ b/ports/ipython_extension/background.js
@@ -0,0 +1,46 @@
+

[Sam Clegg, 2014/02/18 23:39:31]

Please add copyright to all files in naclports.

+var createEmbed = function(id) {
+  var embed = document.createElement('object');
+  embed.width = 0;
+  embed.height = 0;
+  embed.data = 'python.nmf';
+  embed.type = 'application/x-nacl';
+  document.body.appendChild(embed);
+
+  return embed;
+};
+
+
+chrome.runtime.onConnectExternal.addListener(function(port) {
+  var embed = null;
+  // Create an embed element that runs the NaCl kernel
+
+  port.onMessage.addListener(function(msg) {
+    if (msg.type === 'create') {
+      embed = createEmbed(msg.id);
+
+      // forward all messages across port
+      embed.addEventListener('message', function(e) {
+        var msg = e.data;
+        msg.type = 'message';
+        port.postMessage(msg);
+      });
+      embed.addEventListener('progress', function(e) {
+        var progress = Math.round(100 * e.loaded / e.total);
+        if (isNaN(progress)) { progress = 100; }
+        port.postMessage({type: 'progress', progress: progress});
+      });
+      embed.addEventListener('loadend', function(e) {
+        port.postMessage({'type': 'loadend'})
+      });
+      embed.addEventListener('crash', function() {
+        port.disconnect();
+      });
+    } else if (msg.type === 'message') {
+      embed.postMessage({json: msg.json});
+    }
+  });
+  port.onDisconnect.addListener(function() {
+    console.log("disconnected");
+  });
+});