TraceKit.catch.stuff.js

//THIS IS NOW SHIELD.JS github.com/devinrhode2/shield.js
/**
 * (function(){
 *  ..code..
 * }).runInTryCatch();
 * Shorthand to run function in a TraceKit try/catch block.
 * 
 * Prototype is less loud than:
 * runInTryCatch(function(){
 *  ..code..
 * })
 */
TraceKit.runInTryCatch = function TraceKit_runInTryCatchFn(fn) {
  try {
    fn();
  } catch (e) {
    TraceKit.report(e);
  }
};

(function TraceKitWrapper() {
  
  //_.isFunction, restructured some
  var isFunction = (typeof (/./) !== 'function' ?
    //use optimized version:
    function(obj) {
      return typeof (obj) === 'function';
    }
  :
    function(obj) {
      return toString.call(obj) == '[object Function]';
    }
  );
  
  /**
   * TraceKit.apiWrapper
   * Mutates an api so every functon argument passed in get's mutated and wrapped in a try/catch block.
   * 
   * Example: catch all $(document).ready():
   * $.fn.on = TraceKit.apiWrapper($.fn.on);
   */
  TraceKit.apiWrapper = function apiWrapperFn(apiFn) {
    return function apiWrapper_ReturnedFn() {
      var args = [].slice.call(arguments, 0);
      var length = args.length;
      var arg;
   
      //before executing the overriden function, transform each function arg to have a try/catch wrapper
      while (arg = args[--length]) {
        if (isFunction(arg)) {
          prevFunc = arg;
          arg = function TraceKitApiWrapper() {
            try {
              var args = [].slice.call(arguments, 0);
              if (prevFunc.apply) {
                prevFunc.apply(this, args);
              } else { //setTimeout/setInterval in IE
                prevFunc(args[0], args[1]);
              }
            } catch (e) {
              TraceKit.report(e);
            }
          };
        }
      }
      //errors in apiFn bubble up (to window or hopefully a try/catch block.)
      apiFn.apply(this, args);
    };
  };
}).runInTryCatch();