1 files changed, 407 insertions, 0 deletions
diff --git a/src/delete/Scope.js b/src/delete/Scope.js
new file mode 100644
index 00000000..ae3f9f11
--- /dev/null
+++ b/src/delete/Scope.js
@@ -0,0 +1,407 @@
+function Scope(initialState, name) {
+  var self = this;
+  self.widgets = [];
+  self.evals = [];
+  self.watchListeners = {};
+  self.name = name;
+  initialState = initialState || {};
+  var State = function(){};
+  State.prototype = initialState;
+  self.state = new State();
+  extend(self.state, {
+    '$parent': initialState,
+    '$watch': bind(self, self.addWatchListener),
+    '$eval': bind(self, self.eval),
+    '$bind': bind(self, bind, self),
+    // change name to autoEval?
+    '$addEval': bind(self, self.addEval),
+    '$updateView': bind(self, self.updateView)
+  });
+  if (name == "ROOT") {
+    self.state['$root'] = self.state;
+  }
+};
+
+Scope.expressionCache = {};
+Scope.getter = function(instance, path) {
+  if (!path) return instance;
+  var element = path.split('.');
+  var key;
+  var lastInstance = instance;
+  var len = element.length;
+  for ( var i = 0; i < len; i++) {
+    key = element[i];
+    if (!key.match(/^[\$\w][\$\w\d]*$/))
+        throw "Expression '" + path + "' is not a valid expression for accesing variables.";
+    if (instance) {
+      lastInstance = instance;
+      instance = instance[key];
+    }
+    if (_.isUndefined(instance)  && key.charAt(0) == '$') {
+      var type = angular['Global']['typeOf'](lastInstance);
+      type = angular[type.charAt(0).toUpperCase()+type.substring(1)];
+      var fn = type ? type[[key.substring(1)]] : undefined;
+      if (fn) {
+        instance = _.bind(fn, lastInstance, lastInstance);
+        return instance;
+      }
+    }
+  }
+  if (typeof instance === 'function' && !instance['$$factory']) {
+    return bind(lastInstance, instance);
+  }
+  return instance;
+};
+
+Scope.setter = function(instance, path, value){
+  var element = path.split('.');
+  for ( var i = 0; element.length > 1; i++) {
+    var key = element.shift();
+    var newInstance = instance[key];
+    if (!newInstance) {
+      newInstance = {};
+      instance[key] = newInstance;
+    }
+    instance = newInstance;
+  }
+  instance[element.shift()] = value;
+  return value;
+};
+
+Scope.prototype = {
+  // TODO: rename to update? or eval?
+  updateView: function() {
+    var self = this;
+    this.fireWatchers();
+    foreach(this.widgets, function(widget){
+      self.evalWidget(widget, "", {}, function(){
+        this.updateView(self);
+      });
+    });
+    foreach(this.evals, bind(this, this.apply));
+  },
+
+  addWidget: function(controller) {
+    if (controller) this.widgets.push(controller);
+  },
+
+  addEval: function(fn, listener) {
+    // todo: this should take a function/string and a listener
+    // todo: this is a hack, which will need to be cleaned up.
+    var self = this,
+        listenFn = listener || noop,
+        expr = self.compile(fn);
+    this.evals.push(function(){
+      self.apply(listenFn, expr());
+    });
+  },
+
+  isProperty: function(exp) {
+    for ( var i = 0; i < exp.length; i++) {
+      var ch = exp.charAt(i);
+      if (ch!='.'  && !Lexer.prototype.isIdent(ch)) {
+        return false;
+      }
+    }
+    return true;
+  },
+
+  get: function(path) {
+//    log('SCOPE.get', path, Scope.getter(this.state, path));
+    return Scope.getter(this.state, path);
+  },
+
+  set: function(path, value) {
+//    log('SCOPE.set', path, value);
+    var instance = this.state;
+    return Scope.setter(instance, path, value);
+  },
+
+  setEval: function(expressionText, value) {
+    this.eval(expressionText + "=" + toJson(value));
+  },
+
+  compile: function(exp) {
+    if (isFunction(exp)) return bind(this.state, exp);
+    var expFn = Scope.expressionCache[exp], self = this;
+    if (!expFn) {
+      var parser = new Parser(exp);
+      expFn = parser.statements();
+      parser.assertAllConsumed();
+      Scope.expressionCache[exp] = expFn;
+    }
+    return function(context){
+      context = context || {};
+      context.self = self.state;
+      context.scope = self;
+      return expFn.call(self, context);
+    };
+  },
+
+  eval: function(exp, context) {
+//    log('Scope.eval', expressionText);
+    return this.compile(exp)(context);
+  },
+
+  //TODO: Refactor. This function needs to be an execution closure for widgets
+  // move to widgets
+  // remove expression, just have inner closure.
+  evalWidget: function(widget, expression, context, onSuccess, onFailure) {
+    try {
+      var value = this.eval(expression, context);
+      if (widget.hasError) {
+        widget.hasError = false;
+        jQuery(widget.view).
+          removeClass('ng-exception').
+          removeAttr('ng-error');
+      }
+      if (onSuccess) {
+        value = onSuccess.apply(widget, [value]);
+      }
+      return true;
+    } catch (e){
+      var jsonError = toJson(e, true);
+      error('Eval Widget Error:', jsonError);
+      widget.hasError = true;
+      jQuery(widget.view).
+        addClass('ng-exception').
+        attr('ng-error', jsonError);
+      if (onFailure) {
+        onFailure.apply(widget, [e, jsonError]);
+      }
+      return false;
+    }
+  },
+
+  validate: function(expressionText, value, element) {
+    var expression = Scope.expressionCache[expressionText];
+    if (!expression) {
+      expression = new Parser(expressionText).validator();
+      Scope.expressionCache[expressionText] = expression;
+    }
+    var self = {scope:this, self:this.state, '$element':element};
+    return expression(self)(self, value);
+  },
+
+  entity: function(entityDeclaration, datastore) {
+    var expression = new Parser(entityDeclaration).entityDeclaration();
+    return expression({scope:this, datastore:datastore});
+  },
+
+  clearInvalid: function() {
+    var invalid = this.state['$invalidWidgets'];
+    while(invalid.length > 0) {invalid.pop();}
+  },
+
+  markInvalid: function(widget) {
+    this.state['$invalidWidgets'].push(widget);
+  },
+
+  watch: function(declaration) {
+    var self = this;
+    new Parser(declaration).watch()({
+      scope:this,
+      addListener:function(watch, exp){
+        self.addWatchListener(watch, function(n,o){
+          try {
+            return exp({scope:self}, n, o);
+          } catch(e) {
+            alert(e);
+          }
+        });
+      }
+    });
+  },
+
+  addWatchListener: function(watchExpression, listener) {
+    // TODO: clean me up!
+    if (!isFunction(listener)) {
+      listener = this.compile(listener);
+    }
+    var watcher = this.watchListeners[watchExpression];
+    if (!watcher) {
+      watcher = {listeners:[], expression:watchExpression};
+      this.watchListeners[watchExpression] = watcher;
+    }
+    watcher.listeners.push(listener);
+  },
+
+  fireWatchers: function() {
+    var self = this, fired = false;
+    foreach(this.watchListeners, function(watcher) {
+      var value = self.eval(watcher.expression);
+      if (value !== watcher.lastValue) {
+        foreach(watcher.listeners, function(listener){
+          listener(value, watcher.lastValue);
+          fired = true;
+        });
+        watcher.lastValue = value;
+      }
+    });
+    return fired;
+  },
+
+  apply: function(fn) {
+    fn.apply(this.state, slice.call(arguments, 1, arguments.length));
+  }
+};
+
+//////////////////////////////
+
+function getter(instance, path) {
+  if (!path) return instance;
+  var element = path.split('.');
+  var key;
+  var lastInstance = instance;
+  var len = element.length;
+  for ( var i = 0; i < len; i++) {
+    key = element[i];
+    if (!key.match(/^[\$\w][\$\w\d]*$/))
+        throw "Expression '" + path + "' is not a valid expression for accesing variables.";
+    if (instance) {
+      lastInstance = instance;
+      instance = instance[key];
+    }
+    if (_.isUndefined(instance)  && key.charAt(0) == '$') {
+      var type = angular['Global']['typeOf'](lastInstance);
+      type = angular[type.charAt(0).toUpperCase()+type.substring(1)];
+      var fn = type ? type[[key.substring(1)]] : undefined;
+      if (fn) {
+        instance = _.bind(fn, lastInstance, lastInstance);
+        return instance;
+      }
+    }
+  }
+  if (typeof instance === 'function' && !instance['$$factory']) {
+    return bind(lastInstance, instance);
+  }
+  return instance;
+};
+
+function setter(instance, path, value){
+  var element = path.split('.');
+  for ( var i = 0; element.length > 1; i++) {
+    var key = element.shift();
+    var newInstance = instance[key];
+    if (!newInstance) {
+      newInstance = {};
+      instance[key] = newInstance;
+    }
+    instance = newInstance;
+  }
+  instance[element.shift()] = value;
+  return value;
+};
+
+var compileCache = {};
+function expressionCompile(exp){
+  if (isFunction(exp)) return exp;
+  var expFn = compileCache[exp];
+  if (!expFn) {
+    var parser = new Parser(exp);
+    expFn = parser.statements();
+    parser.assertAllConsumed();
+    compileCache[exp] = expFn;
+  }
+  // return expFn
+  // TODO(remove this hack)
+  return function(){
+    return expFn({
+      scope: {
+        set: this.$set,
+        get: this.$get
+      }
+    });
+  };
+};
+
+var NON_RENDERABLE_ELEMENTS = {
+  '#text': 1, '#comment':1, 'TR':1, 'TH':1
+};
+
+function isRenderableElement(element){
+  return element && element[0] && !NON_RENDERABLE_ELEMENTS[element[0].nodeName];
+}
+
+function rethrow(e) { throw e; }
+function errorHandlerFor(element) {
+  while (!isRenderableElement(element)) {
+    element = element.parent() || jqLite(document.body);
+  }
+  return function(error) {
+    element.attr('ng-error', angular.toJson(error));
+    element.addClass('ng-exception');
+  };
+}
+
+function createScope(parent, Class) {
+  function Parent(){}
+  function API(){}
+  function Behavior(){}
+
+  var instance, behavior, api, watchList = [], evalList = [];
+
+  Class = Class || noop;
+  parent = Parent.prototype = parent || {};
+  api = API.prototype = new Parent();
+  behavior = Behavior.prototype = extend(new API(), Class.prototype);
+  instance = new Behavior();
+
+  extend(api, {
+    $parent: parent,
+    $bind: bind(instance, bind, instance),
+    $get: bind(instance, getter, instance),
+    $set: bind(instance, setter, instance),
+
+    $eval: function(exp) {
+      if (isDefined(exp)) {
+        return expressionCompile(exp).apply(instance, slice.call(arguments, 1, arguments.length));
+      } else {
+        foreach(evalList, function(eval) {
+          instance.$tryEval(eval.fn, eval.handler);
+        });
+        foreach(watchList, function(watch) {
+          var value = instance.$tryEval(watch.watch, watch.handler);
+          if (watch.last !== value) {
+            instance.$tryEval(watch.listener, watch.handler, value, watch.last);
+            watch.last = value;
+          }
+        });
+      }
+    },
+
+    $tryEval: function (expression, exceptionHandler) {
+      try {
+        return expressionCompile(expression).apply(instance, slice.call(arguments, 2, arguments.length));
+      } catch (e) {
+        error(e);
+        if (isFunction(exceptionHandler)) {
+          exceptionHandler(e);
+        } else if (exceptionHandler) {
+          errorHandlerFor(exceptionHandler)(e);
+        }
+      }
+    },
+
+    $watch: function(watchExp, listener, exceptionHandler) {
+      var watch = expressionCompile(watchExp);
+      watchList.push({
+        watch: watch,
+        last: watch.call(instance),
+        handler: exceptionHandler,
+        listener:expressionCompile(listener)
+      });
+    },
+
+    $onEval: function(expr, exceptionHandler){
+      evalList.push({
+        fn: expressionCompile(expr),
+        handler: exceptionHandler
+      });
+    }
+  });
+
+  Class.apply(instance, slice.call(arguments, 2, arguments.length));
+
+  return instance;
+}