Hacked implementation of broadcasts

src/engine/sequencer.js

@@ -137,6 +137,32 @@ Sequencer.prototype.stepThread = function (thread) {
         thread.stackFrames.pop();
     };
 
+    /**
+     * A callback for the primitive to start hats.
+     * @todo very hacked...
+     */
+    var startHats = function(callback) {
+        for (var i = 0; i < instance.runtime.stacks.length; i++) {
+            var stack = instance.runtime.stacks[i];
+            var stackBlock = instance.runtime.blocks[stack];
+            var result = callback(stackBlock);
+            if (result) {
+                // Check if the stack is already running
+                var stackRunning = false;
+
+                for (var j = 0; j < instance.runtime.threads.length; j++) {
+                    if (instance.runtime.threads[j].topBlock == stack) {
+                        stackRunning = true;
+                        break;
+                    }
+                }
+                if (!stackRunning) {
+                    instance.runtime._pushThread(stack);
+                }
+            }
+        }
+    };
+
     /**
      * Record whether we have switched stack,
      * to avoid proceeding the thread automatically.
@@ -191,7 +217,8 @@ Sequencer.prototype.stepThread = function (thread) {
                     done: threadDoneCallback,
                     timeout: YieldTimers.timeout,
                     stackFrame: currentStackFrame,
-                    startSubstack: threadStartSubstack
+                    startSubstack: threadStartSubstack,
+                    startHats: startHats
                 });
             }
             catch(e) {