From 9103918abd04e38e5761199469e61578e85aa5af Mon Sep 17 00:00:00 2001
From: Andrew <andrewtjoslin@gmail.com>
Date: Fri, 20 Mar 2015 20:00:06 -0600
Subject: [PATCH] add tree config with tests

---
 playground/basic-example/main.html            |  47 +++-
 playground/basic-example/main.js              |   2 -
 src/components.js                             |   4 +-
 src/components/aside/aside.js                 |  14 +-
 .../aside/behaviors/direction/direction.js    |  48 ++--
 src/config.js                                 | 210 ++++++++++++++----
 src/config_spec.js                            | 137 ++++++++++++
 src/core/config/config.js                     |  54 -----
 src/core/config/config_spec.js                |   4 -
 src/core/gestures/gesture.js                  |   2 +
 src/util.js                                   |  37 ++-
 src/util_spec.js                              |  52 +++++
 src/views/view.js                             |  38 ++--
 13 files changed, 482 insertions(+), 167 deletions(-)
 create mode 100644 src/config_spec.js
 delete mode 100644 src/core/config/config.js
 delete mode 100644 src/core/config/config_spec.js
 create mode 100644 src/util_spec.js

diff --git a/playground/basic-example/main.html b/playground/basic-example/main.html
index be67d12c9b..963900f1b9 100644
--- a/playground/basic-example/main.html
+++ b/playground/basic-example/main.html
@@ -1,4 +1,31 @@
 <ion-aside-parent>
+  <ion-aside side="right">
+    Hello ...
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    Side menu!
+  </ion-aside>
+  <ion-aside side="bottom">
+    Hello ...
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    Side menu!
+  </ion-aside>
+  <ion-aside side="top">
+    Hello ...
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    <p>...</p>
+    Side menu!
+  </ion-aside>
   <ion-aside side="left">
     Hello ...
     <p>...</p>
@@ -13,20 +40,20 @@
     <ion-tabbar view-title="Tabs 2"></ion-tabbar>
     <ion-tabbar view-title="Tabs 4"></ion-tabbar>
 
-<button (click)="showModal()">Show Modal</button>
-
-
-<ion-switch></ion-switch>
-<!--
-<ion-modal>
-  <h2>I'm a modal!</h2>
-</ion-modal>
--->
     <button (click)="showModal()">Show Modal</button>
+
+
+    <ion-switch></ion-switch>
     <!--
     <ion-modal>
       <h2>I'm a modal!</h2>
     </ion-modal>
     -->
-  </div>
+        <button (click)="showModal()">Show Modal</button>
+        <!--
+        <ion-modal>
+          <h2>I'm a modal!</h2>
+        </ion-modal>
+        -->
+      </div>
 </ion-aside-parent>
diff --git a/playground/basic-example/main.js b/playground/basic-example/main.js
index 3e42498e77..ef6d863fe5 100644
--- a/playground/basic-example/main.js
+++ b/playground/basic-example/main.js
@@ -2,8 +2,6 @@ import {bootstrap} from 'angular2/core';
 import {Component, Template} from 'angular2/angular2';
 import {Aside, AsideParent} from 'ionic/components';
 
-// import 'ionic/components/tabbar/mixins/android/android-tabbar';
-
 @Component({ selector: '[playground-main]' })
 @Template({
   url: 'main.html',
diff --git a/src/components.js b/src/components.js
index f09e63eb8f..1449e0f6d7 100644
--- a/src/components.js
+++ b/src/components.js
@@ -1,2 +1,2 @@
-export * from './components/sidemenu/sidemenu';
-import './components/sidemenu/behaviors/direction/direction';
+export * from './components/aside/aside'
+import './components/aside/behaviors/direction/direction'
diff --git a/src/components/aside/aside.js b/src/components/aside/aside.js
index 9536b77e0b..cedaa86776 100644
--- a/src/components/aside/aside.js
+++ b/src/components/aside/aside.js
@@ -4,10 +4,10 @@ import {IonConfig} from '../../config';
 import {DragGesture} from '../../core/gestures/drag-gesture';
 import * as util from '../../util';
 
-export var asideConfig = new IonConfig('sidemenu')
+export var asideConfig = new IonConfig('aside');
 
 // TODO defaults or bindings?
-asideConfig.defaults({
+asideConfig.set({
   side: 'left',
   dragThreshold: 50
 });
@@ -15,7 +15,7 @@ asideConfig.defaults({
 @Component({
   selector: 'ion-aside',
   bind: {
-    edge: 'side',
+    side: 'side',
     dragThreshold: 'dragThreshold'
   },
 })
@@ -38,7 +38,8 @@ export class Aside extends Ion {
     });
     this.dragMethods = {
       getMenuStart() { return 0; },
-      getEventPos(ev) { return ev.center.x; }
+      getEventPos(ev) { return ev.center.x; },
+      canStart() { return true; }
     };
     this.gesture.listen();
 
@@ -46,7 +47,10 @@ export class Aside extends Ion {
       this.setChanging(false);
     })
 
-    asideConfig(this);
+    // TODO: remove this. setTimeout has to be done so the bindings can be applied
+    setTimeout(() => {
+      asideConfig.invoke(this);
+    });
   }
   onDragStart(ev) {
     if (!this.dragMethods.canStart(ev)) {
diff --git a/src/components/aside/behaviors/direction/direction.js b/src/components/aside/behaviors/direction/direction.js
index c157da2ecb..05aeb9d4b6 100644
--- a/src/components/aside/behaviors/direction/direction.js
+++ b/src/components/aside/behaviors/direction/direction.js
@@ -1,14 +1,18 @@
-import {asideConfig} from '../../sidemenu';
+import {asideConfig} from '../../aside';
 import * as util from '../../../../util';
 
-asideConfig.when(instance => instance.side === 'bottom')
-  .mixin(function() {
+asideConfig
+  .behavior(function() {
+    if (this.side !== 'bottom') return;
 
     this.gesture.options({
       direction: Hammer.DIRECTION_VERTICAL
     });
     this.domElement.classList.add('bottom');
     util.extend(this.dragMethods, {
+      canStart: ev => {
+        return this.isOpen || ev.center.y > window.innerHeight - this.dragThreshold;
+      },
       getMenuStart: (drag, ev) => {
         return this.isOpen ?  -drag.height : 0;
       },
@@ -27,13 +31,14 @@ asideConfig.when(instance => instance.side === 'bottom')
         return ev.center.y;
       }
     });
-
-  });
-
-asideConfig.when(instance => instance.side === 'left')
-  .mixin(function() {
+  })
+  .behavior(function() {
+    if (this.side !== 'left') return;
 
     this.domElement.classList.add('left');
+    this.gesture.options({
+      direction: Hammer.DIRECTION_HORIZONTAL
+    });
     util.extend(this.dragMethods, {
       canStart: (ev) => {
         return this.isOpen || ev.center.x < this.dragThreshold;
@@ -51,21 +56,26 @@ asideConfig.when(instance => instance.side === 'left')
         this.setOpen(drag.pos > drag.width / 2);
         this.domElement.style.transform = '';
       }
-    });
+    })
 
-  });
-
-asideConfig.when(instance => instance.side === 'right')
-  .mixin(function() {
+  })
+  .behavior(function() {
+    if (this.side !== 'right') return;
 
     this.domElement.classList.add('right');
+    this.gesture.options({
+      direction: Hammer.DIRECTION_HORIZONTAL
+    });
     util.extend(this.dragMethods, {
+      canStart: ev => {
+        return this.isOpen || ev.center.x > window.innerWidth - this.dragThreshold;
+      },
       getMenuStart: (drag, ev) => {
         return this.isOpen ?  -drag.width : 0;
       },
       onDrag: (drag, ev) => {
         drag.pos = util.clamp(
-          0, -drag.menuStart + drag.pointerStart - ev.center.x, drag.height
+          0, -drag.menuStart + drag.pointerStart - ev.center.x, drag.width
         );
         this.domElement.style.transform = 'translate3d(' +
           (drag.width - drag.pos) + 'px,0,0)';
@@ -76,13 +86,15 @@ asideConfig.when(instance => instance.side === 'right')
       }
     });
 
-  });
-
-asideConfig.when(instance => instance.side === 'top')
-  .mixin(function() {
+  })
+  .behavior(function() {
+    if (this.side !== 'top') return;
 
     this.domElement.classList.add('top');
     util.extend(this.dragMethods, {
+      canStart: ev => {
+        return this.isOpen || ev.center.y < this.dragThreshold * 5;
+      },
       getMenuStart: (drag, ev) => {
         return this.isOpen ? drag.height : 0;
       },
diff --git a/src/config.js b/src/config.js
index 9afc21d63a..565c682ea3 100644
--- a/src/config.js
+++ b/src/config.js
@@ -1,55 +1,177 @@
 import * as Platform from './platform';
 import * as util from './util';
 
-export function IonConfig(name) {
+/*
+ config
+   .set({ side: 'left' })
+   .set('threshold', 50)
+   .platform('ios')
+     .set('side', 'top')
+     .unset('threshold')
+     .media('lg')
+       .set('side', 'right')
 
-  // TODO automatically add platform class
-  // TODO do bindings/defaults have to be written twice?
-  // TODO maybe add config to IonicComponent annotation
-  // TODO map options to config
-  function Config(instance, element) {
-    var platformName = Platform.getPlatform();
-    (element.domElement || element).classList.add(`${name}-${platformName}`);
+config.platform('ios')
+  .behavior(function() {
+    do something
+  })
+  .defaults({
+    side: 'right'
+  })
+  
+config.platform('ios').media('tablet')
+  .defaults({
+    side: 'bottom'
+  });
+*/
 
-    util.defaults(instance, Config._defaults || {});
-    var conditions = Config._conditions;
-    for (var i = 0, ii = conditions.length; i < ii; i++) {
-      if (conditions[i]._callback(instance)) {
-        for (var j = 0, jj = conditions[i]._mixins.length; j < jj; j++) {
-          conditions[i]._mixins[j].call(instance);
-        }
-      }
+
+/*
+ User wants to remove the default behavior for sidemenu, but that's stuck under `.platform('ios').`
+
+config.platform('ios').media('tablet') === config.media('tablet').platform('ios')
+*/
+var QUERIES = {
+  sm: true,
+  md: true,
+  lg: true
+};
+var PLATFORMS = {
+  ios: true,
+  android: true
+};
+
+function isPlatform(key = '') {
+  return key.toLowerCase() in PLATFORMS;
+}
+function isMedia(key = '') {
+  return key.toLowerCase() in QUERIES;
+}
+class ConfigCase {
+  constructor({ root, parent, path }) {
+    this._root = root;
+    this._parent = parent;
+    this._path = path || [];
+    this._values = {};
+    this.behaviors = [];
+  }
+  platform(key = '') {
+    if (isPlatform(key)) return this._root._addCase(key, this);
+    return this;
+  }
+  media(key = '') {
+    if (isMedia(key)) return this._root._addCase(key, this);
+    return this;
+  }
+  when(condition = '') {
+    if (isPlatform(condition) || isMedia(condition)) {
+      return this._root._addCase(condition, this);
     }
-  }
-
-  Config._conditions = [];
-  Config.defaults = function(defaults) {
-    Config._defaults = defaults;
-  };
-  Config.when = function when(callback) {
-    var condition = new ConfigCondition(callback);
-    Config._conditions.push(condition);
-    return condition;
-  };
-  Config.platform = function platform(name) {
-    return Config.when(() => Platform.getPlatform() === name);
-  };
-
-  return Config;
-}
-
-class ConfigCondition {
-  constructor(callback, mixins = [], template = '') {
-    this._callback = callback;
-    this._mixins = mixins;
-    this._template = template;
-  }
-  mixin(mixinFn) {
-    this._mixins.push(mixinFn);
     return this;
   }
-  template(url) {
-    this._template = url;
+  behavior(fn) {
+    this.behaviors.push(fn);
     return this;
   }
+  set(a, b) {
+    if (util.isString(a)) {
+      this._values[a] = b;
+    } else {
+      util.extend(this._values, a || {});
+    }
+    return this;
+  }
+  unset(key) {
+    delete this._values[key];
+  }
+  get(key) {
+    return util.isDefined(this._values[key]) ? 
+      this._values[key] :
+      (this._parent ? this._parent.get(key) : undefined);
+  }
+}
+
+export class IonConfig extends ConfigCase {
+  constructor() {
+    this._root = this;
+    this._cases = {};
+    super({
+      root: this, 
+      parent: null, 
+      path: '' 
+    });
+  }
+  invoke(instance) {
+    return invokeConfig(this, instance);
+  }
+  _addCase(key, baseCase) {
+    var path = baseCase._path.slice();
+    path.push(key);
+
+    // Remove empties & duplicates
+    path = path
+      .filter((value, index) => {
+        return value && path.indexOf(value) === index;
+      })
+      .sort();
+
+    if (path.join(' ') === baseCase._path.join(' ')) {
+      return baseCase;
+    }
+    return this._createCase(path);
+  }
+  _createCase(path) {
+    if (!path.length) return this;
+    var pathStr = path.join(' ');
+    var configCase = this._cases[pathStr];
+    if (!configCase) {
+      var parentPath = path.slice(0, path.length - 1);
+      configCase = this._cases[pathStr] = new ConfigCase({
+        root: this, 
+        parent: this._createCase(parentPath), 
+        path: path
+      });
+    }
+    return configCase;
+  }
+}
+
+export function invokeConfig(config, object, opts = {}) {
+  util.defaults(opts, { media: 'lg', platform: 'ios' });
+  var { platform, media } = opts;
+
+  var passedCases = [config].concat(
+    Object.keys(config._cases)
+      .map(name => config._cases[name])
+      .filter(configCasePasses)
+      .sort(function(a,b) {
+        return a._path.length < b._path.length ? -1 : 1;
+      })
+  );
+
+  // Extend the given object with the values of all the passed cases, starting with the
+  // most specific.
+  var defaults = [object];
+  var behaviors = [];
+  for (let i = 0, ii = passedCases.length; i < ii; i++) {
+    defaults.push(passedCases[i]._values);
+    // Avoid allocating a new array for each passed case's array of behaviors
+    behaviors.push.apply(behaviors, passedCases[i].behaviors);
+  }
+
+  util.defaults.apply(null, defaults);
+
+  for (let i = 0, ii = behaviors.length; i < ii; i++) {
+    behaviors[i].call(object, object);
+  }
+
+  function configCasePasses(configCase) {
+    var path = configCase._path;
+    var key;
+    for (let i = 0, ii = path.length; i < ii; i++) {
+      if (!(media === path[i] || platform === path[i])) return false;
+    }
+    return true;
+  }
+
 }
diff --git a/src/config_spec.js b/src/config_spec.js
new file mode 100644
index 0000000000..3292cafc65
--- /dev/null
+++ b/src/config_spec.js
@@ -0,0 +1,137 @@
+import {IonConfig} from './config';
+
+export function main() {
+  var rootConfig;
+  beforeEach(() => {
+    rootConfig = new IonConfig();
+  });
+
+  it('should create a config one level down', () => {
+    var sub = rootConfig.platform('ios');
+    expect(sub._parent).toBe(rootConfig);
+    expect(sub._path).toEqual(['ios']);
+    expect(rootConfig._cases.ios).toBe(sub);
+  });
+
+  it('should create a config two levels down', () => {
+    var sub1 = rootConfig.platform('ios');
+    var sub2 = sub1.media('lg');
+    expect(sub2._parent).toBe(sub1);
+    expect(sub1._parent).toBe(rootConfig);
+    expect(rootConfig._cases['ios lg']).toBe(sub2);
+    expect(rootConfig._cases.ios).toBe(sub1);
+  });
+
+  it('set should be chainable', () => {
+    expect(rootConfig.set()).toBe(rootConfig);
+  });
+
+  it('should set values on the root', () => {
+    rootConfig.set({
+      letter: 'a'
+    });
+    expect(rootConfig.get('letter')).toBe('a');
+  });
+
+  it('should always return the same object for the same key', () => {
+    expect(rootConfig.platform('android')).toBe(rootConfig.platform('android'));
+    expect(rootConfig.platform('ios')).toBe(rootConfig.platform('ios'));
+    expect(rootConfig.media('lg')).toBe(rootConfig.media('lg'));
+  });
+
+  it('should return the same object when nesting in different order', () => {
+    var sub1 = rootConfig.platform('ios').media('sm');
+    var sub2 = rootConfig.media('sm').platform('ios');
+    expect(sub1).toBe(sub2);
+  });
+
+  it('should return the same object when nesting in different order for huge queries', () => {
+    var sub1 = rootConfig.platform('ios').media('sm').platform('android').media('lg');
+    var sub2 = rootConfig.media('sm').media('lg').platform('android').platform('ios');
+    expect(sub1).toBe(sub2);
+  });
+
+  it('should set values one level down and be chainable', () => {
+    rootConfig.set({ letter: 'a' });
+    var sub1 = rootConfig.platform('ios');
+    expect(sub1.get('letter')).toBe('a');
+    expect( sub1.set({ letter: 'b' }) ).toBe(sub1);
+    expect(sub1.get('letter')).toBe('b');
+  });
+
+  it('should set values two levels down and be chainable', () => {
+    rootConfig.set({ letter: 'a' });
+    var sub1 = rootConfig.platform('ios');
+    sub1.set({ letter: 'b' });
+    var sub2 = sub1.media('lg');
+    expect(sub2.get('letter')).toBe('b');
+    expect( sub2.set({ letter: 'c' }) ).toBe(sub2);
+    expect(sub2.get('letter')).toBe('c');
+  });
+
+  it('should use parent\'s value if its later set to undefined', () => {
+    rootConfig.set({ letter: 'a' });
+    var sub1 = rootConfig.platform('ios');
+    sub1.set({ letter: 'b' });
+    expect(sub1.get('letter')).toBe('b');
+    sub1.unset('letter');
+    expect(sub1.get('letter')).toBe('a');
+  });
+
+  it('when() as alias for media()', () => {
+    expect(rootConfig.when('lg')).toBe(rootConfig.media('lg'));
+    expect(rootConfig.when('bad')).toBe(rootConfig);
+    expect(rootConfig.when('lg')).not.toBe(rootConfig.when('ios'));
+  });
+
+  it('when() as alias for platform()', () => {
+    expect(rootConfig.platform('ios')).toBe(rootConfig.when('ios'));
+    expect(rootConfig.when('bad')).toBe(rootConfig);
+  });
+
+  describe('invokeConfig', function() {
+
+    it('should invoke defaults', () => {
+      var obj = {};
+      rootConfig.set('foo', 'bar');
+      rootConfig.invoke(obj);
+    });
+
+    it('should invoke defaults in nested whens', () => {
+      var obj = {};
+      rootConfig.set({ a: 'root', b: 'root' });
+      rootConfig.when('ios').set({b: 'ios', c: 'ios'});
+      rootConfig.when('ios').when('lg').set({ c: 'ios-lg', d: 'ios-lg' });
+
+      rootConfig.invoke(obj);
+      expect(obj).toEqual({
+        a: 'root', 
+        b: 'ios',
+        c: 'ios-lg',
+        d: 'ios-lg'
+      });
+    });
+
+    it('should run behaviors', () => {
+      var obj = {};
+      rootConfig.behavior(instance => {
+        instance.foo = 'bar';
+      });
+      rootConfig.invoke(obj);
+      expect(obj.foo).toBe('bar');
+    });
+
+    it('should invoke behaviors in nested whens', () => {
+      var obj = {};
+      rootConfig.when('ios')
+        .behavior(o => o.ios = true)
+        .when('lg')
+          .behavior(o => o.lg = true)
+      rootConfig.invoke(obj);
+      expect(obj).toEqual({
+        ios: true,
+        lg: true
+      });
+    });
+  });
+}
diff --git a/src/core/config/config.js b/src/core/config/config.js
deleted file mode 100644
index 47aedea274..0000000000
--- a/src/core/config/config.js
+++ /dev/null
@@ -1,54 +0,0 @@
-import * as Platform from '../../platform';
-import * as util from '../../util';
-
-export function IonConfig() {
-
-  // TODO automatically add platform class
-  // TODO do bindings/defaults have to be written twice?
-  // TODO maybe add config to IonicComponent annotation
-  // TODO map options to config
-  function Config(instance, element) {
-    (element.domElement || element).classList.add('platform-' + Platform.getPlatform());
-
-    util.defaults(instance, Config._defaults || {});
-    var conditions = Config._conditions;
-    for (var i = 0, ii = conditions.length; i < ii; i++) {
-      if (conditions[i]._callback(instance)) {
-        for (var j = 0, jj = conditions[i]._mixins.length; j < jj; j++) {
-          conditions[i]._mixins[j].call(instance);
-        }
-      }
-    }
-  }
-
-  Config._conditions = [];
-  Config.defaults = function(defaults) {
-    Config._defaults = defaults;
-  };
-  Config.when = function when(callback) {
-    var condition = new ConfigCondition(callback);
-    Config._conditions.push(condition);
-    return condition;
-  };
-  Config.platform = function platform(name) {
-    return Config.when(() => Platform.getPlatform() === name);
-  };
-
-  return Config;
-}
-
-class ConfigCondition {
-  constructor(callback, mixins = [], template = '') {
-    this._callback = callback;
-    this._mixins = mixins;
-    this._template = template;
-  }
-  mixin(mixinFn) {
-    this._mixins.push(mixinFn);
-    return this;
-  }
-  template(url) {
-    this._template = url;
-    return this;
-  }
-}
diff --git a/src/core/config/config_spec.js b/src/core/config/config_spec.js
deleted file mode 100644
index d5a4c2c18d..0000000000
--- a/src/core/config/config_spec.js
+++ /dev/null
@@ -1,4 +0,0 @@
-import {Config} from './config';
-
-export function main() {
-}
diff --git a/src/core/gestures/gesture.js b/src/core/gestures/gesture.js
index 2aa6e6e4cc..91215cbf39 100644
--- a/src/core/gestures/gesture.js
+++ b/src/core/gestures/gesture.js
@@ -2,6 +2,8 @@ import * as util from '../../util';
 
 export class Gesture {
   constructor(element, opts = {}) {
+    util.defaults(opts, {
+    });
     this.element = element;
     this._options = opts;
   }
diff --git a/src/util.js b/src/util.js
index 82ff937dea..6ad717331d 100644
--- a/src/util.js
+++ b/src/util.js
@@ -16,11 +16,38 @@ export function clamp(min, n, max) {
   return Math.max(min, Math.min(n, max));
 }
 
-export function defaults(obj, src) {
-  for (var key in src) {
-    if (src.hasOwnProperty(key) && !obj.hasOwnProperty(key)) {
-      obj[key] = src[key];
+export function defaults(dest) {
+  let extendObj = {};
+  for (let i = arguments.length - 1; i >= 1; i--) {
+    let source = arguments[i] || {};
+    for (let key in source) {
+      if (!dest.hasOwnProperty(key) && !extendObj.hasOwnProperty(key)) {
+        extendObj[key] = source[key];
+      }
     }
   }
-  return obj;
+  for (let key in extendObj) {
+    dest[key] = extendObj[key];
+  }
+  return dest;
 }
+
+export function isString(val) {
+  return typeof val === 'string';
+}
+
+export function isFunction(val) {
+  return typeof val === 'function';
+}
+
+export function isDefined(val) {
+  return typeof val !== 'undefined';
+}
+
+export var array = {
+  unique(array) {
+    return array.filter(function(value, index) {
+      return array.indexOf(value) === index;
+    });
+  }
+};
diff --git a/src/util_spec.js b/src/util_spec.js
new file mode 100644
index 0000000000..f3e3b57026
--- /dev/null
+++ b/src/util_spec.js
@@ -0,0 +1,52 @@
+import * as util from './util';
+
+export function main() {
+  describe('extend', function() {
+
+    it('should extend simple', () => {
+      var obj = { a: '0', c: '0' };
+      expect( util.extend(obj, { a: '1', b: '2' }) ).toBe(obj);
+      expect(obj).toEqual({ a: '1', b: '2', c: '0' });
+    });
+
+    it('should extend complex', () => {
+      expect(util.extend(
+        { a: '0', b: '0' },
+        { b: '1', c: '1' },
+        { c: '2', d: '2' }
+      )).toEqual({
+        a: '0',
+        b: '1',
+        c: '2',
+        d: '2'
+      });
+    });
+
+  });
+
+  describe('defaults', function() {
+
+    it('should simple defaults', () => {
+      var obj = { a: '1' };
+      expect(util.defaults(obj, { a: '2', b: '2' })).toBe(obj);
+      expect(obj).toEqual({ 
+        a: '1', b: '2'
+      });
+    });
+
+    it('should complex defaults', () => {
+      expect(util.defaults(
+        { a: '0', b: '0' },
+        { b: '1', c: '1', e: '1' },
+        { c: '2', d: '2' }
+      )).toEqual({
+        a: '0',
+        b: '0',
+        c: '2',
+        d: '2',
+        e: '1'
+      });
+    });
+
+  });
+}
diff --git a/src/views/view.js b/src/views/view.js
index 208e652c04..2dc8dc5bd0 100644
--- a/src/views/view.js
+++ b/src/views/view.js
@@ -1,33 +1,25 @@
 import * as util from '../util';
 import {ViewHistory} from './view-history';
+// import {Children} from 'angular2/angular2';
 
-export class View extends ViewSwitcher {
-  constructor(el) {
+export class View {
+  constructor(
+    // @Children() views: View
+  ) {
     super(el);
-
-    // A linear history of views that this switcher has gone 
-    // through.
+    this.children = [];
     this.history = new ViewHistory();
-    this.currentChild = null;
   }
 
-  setChild(view, options = {}) {
-    var direction = options.direction || 'forward';
-    var viewIndex = this.history.indexOf(view);
-
-    if (viewIndex !== -1) {
-      direction = 'back';
-      this.history.popTo(viewIndex);
-    } else {
-      this.history.push(view);
-    }
-
-    if (this.currentView) {
-      this.element.removeChild(this.currentView.element);
-    }
-    this.element.appendChild(view.element);
-    this.currentView = view.element;
+  setSelected(isSelected) {
+    this.isSelected = isSelected;
   }
 
+  selectChild(child) {
+    if (this.selectedChild) {
+      this.selectedChild.setSelected(false);
+    }
+    child.setSelected(true);
+    this.selectedChild = child;
+  }
 }
-