add viz 2 post

9 files changed, 2680 insertions, 0 deletions

diff --git a/assets/viz/2/goog/events/browserevent.js b/assets/viz/2/goog/events/browserevent.js
new file mode 100644
index 0000000..14894e1
--- /dev/null
+++ b/assets/viz/2/goog/events/browserevent.js
@@ -0,0 +1,402 @@
+// Copyright 2005 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview A patched, standardized event object for browser events.
+ *
+ * <pre>
+ * The patched event object contains the following members:
+ * - type           {string}    Event type, e.g. 'click'
+ * - target         {Object}    The element that actually triggered the event
+ * - currentTarget  {Object}    The element the listener is attached to
+ * - relatedTarget  {Object}    For mouseover and mouseout, the previous object
+ * - offsetX        {number}    X-coordinate relative to target
+ * - offsetY        {number}    Y-coordinate relative to target
+ * - clientX        {number}    X-coordinate relative to viewport
+ * - clientY        {number}    Y-coordinate relative to viewport
+ * - screenX        {number}    X-coordinate relative to the edge of the screen
+ * - screenY        {number}    Y-coordinate relative to the edge of the screen
+ * - button         {number}    Mouse button. Use isButton() to test.
+ * - keyCode        {number}    Key-code
+ * - ctrlKey        {boolean}   Was ctrl key depressed
+ * - altKey         {boolean}   Was alt key depressed
+ * - shiftKey       {boolean}   Was shift key depressed
+ * - metaKey        {boolean}   Was meta key depressed
+ * - defaultPrevented {boolean} Whether the default action has been prevented
+ * - state          {Object}    History state object
+ *
+ * NOTE: The keyCode member contains the raw browser keyCode. For normalized
+ * key and character code use {@link goog.events.KeyHandler}.
+ * </pre>
+ *
+ * @author arv@google.com (Erik Arvidsson)
+ */
+
+goog.provide('goog.events.BrowserEvent');
+goog.provide('goog.events.BrowserEvent.MouseButton');
+
+goog.require('goog.events.BrowserFeature');
+goog.require('goog.events.Event');
+goog.require('goog.events.EventType');
+goog.require('goog.reflect');
+goog.require('goog.userAgent');
+
+
+
+/**
+ * Accepts a browser event object and creates a patched, cross browser event
+ * object.
+ * The content of this object will not be initialized if no event object is
+ * provided. If this is the case, init() needs to be invoked separately.
+ * @param {Event=} opt_e Browser event object.
+ * @param {EventTarget=} opt_currentTarget Current target for event.
+ * @constructor
+ * @extends {goog.events.Event}
+ */
+goog.events.BrowserEvent = function(opt_e, opt_currentTarget) {
+  goog.events.BrowserEvent.base(this, 'constructor', opt_e ? opt_e.type : '');
+
+  /**
+   * Target that fired the event.
+   * @override
+   * @type {Node}
+   */
+  this.target = null;
+
+  /**
+   * Node that had the listener attached.
+   * @override
+   * @type {Node|undefined}
+   */
+  this.currentTarget = null;
+
+  /**
+   * For mouseover and mouseout events, the related object for the event.
+   * @type {Node}
+   */
+  this.relatedTarget = null;
+
+  /**
+   * X-coordinate relative to target.
+   * @type {number}
+   */
+  this.offsetX = 0;
+
+  /**
+   * Y-coordinate relative to target.
+   * @type {number}
+   */
+  this.offsetY = 0;
+
+  /**
+   * X-coordinate relative to the window.
+   * @type {number}
+   */
+  this.clientX = 0;
+
+  /**
+   * Y-coordinate relative to the window.
+   * @type {number}
+   */
+  this.clientY = 0;
+
+  /**
+   * X-coordinate relative to the monitor.
+   * @type {number}
+   */
+  this.screenX = 0;
+
+  /**
+   * Y-coordinate relative to the monitor.
+   * @type {number}
+   */
+  this.screenY = 0;
+
+  /**
+   * Which mouse button was pressed.
+   * @type {number}
+   */
+  this.button = 0;
+
+  /**
+   * Keycode of key press.
+   * @type {number}
+   */
+  this.keyCode = 0;
+
+  /**
+   * Keycode of key press.
+   * @type {number}
+   */
+  this.charCode = 0;
+
+  /**
+   * Whether control was pressed at time of event.
+   * @type {boolean}
+   */
+  this.ctrlKey = false;
+
+  /**
+   * Whether alt was pressed at time of event.
+   * @type {boolean}
+   */
+  this.altKey = false;
+
+  /**
+   * Whether shift was pressed at time of event.
+   * @type {boolean}
+   */
+  this.shiftKey = false;
+
+  /**
+   * Whether the meta key was pressed at time of event.
+   * @type {boolean}
+   */
+  this.metaKey = false;
+
+  /**
+   * History state object, only set for PopState events where it's a copy of the
+   * state object provided to pushState or replaceState.
+   * @type {Object}
+   */
+  this.state = null;
+
+  /**
+   * Whether the default platform modifier key was pressed at time of event.
+   * (This is control for all platforms except Mac, where it's Meta.)
+   * @type {boolean}
+   */
+  this.platformModifierKey = false;
+
+  /**
+   * The browser event object.
+   * @private {Event}
+   */
+  this.event_ = null;
+
+  if (opt_e) {
+    this.init(opt_e, opt_currentTarget);
+  }
+};
+goog.inherits(goog.events.BrowserEvent, goog.events.Event);
+
+
+/**
+ * Normalized button constants for the mouse.
+ * @enum {number}
+ */
+goog.events.BrowserEvent.MouseButton = {
+  LEFT: 0,
+  MIDDLE: 1,
+  RIGHT: 2
+};
+
+
+/**
+ * Static data for mapping mouse buttons.
+ * @type {!Array<number>}
+ */
+goog.events.BrowserEvent.IEButtonMap = [
+  1,  // LEFT
+  4,  // MIDDLE
+  2   // RIGHT
+];
+
+
+/**
+ * Accepts a browser event object and creates a patched, cross browser event
+ * object.
+ * @param {Event} e Browser event object.
+ * @param {EventTarget=} opt_currentTarget Current target for event.
+ */
+goog.events.BrowserEvent.prototype.init = function(e, opt_currentTarget) {
+  var type = this.type = e.type;
+
+  /**
+   * On touch devices use the first "changed touch" as the relevant touch.
+   * @type {Touch}
+   */
+  var relevantTouch = e.changedTouches ? e.changedTouches[0] : null;
+
+  // TODO(nicksantos): Change this.target to type EventTarget.
+  this.target = /** @type {Node} */ (e.target) || e.srcElement;
+
+  // TODO(nicksantos): Change this.currentTarget to type EventTarget.
+  this.currentTarget = /** @type {Node} */ (opt_currentTarget);
+
+  var relatedTarget = /** @type {Node} */ (e.relatedTarget);
+  if (relatedTarget) {
+    // There's a bug in FireFox where sometimes, relatedTarget will be a
+    // chrome element, and accessing any property of it will get a permission
+    // denied exception. See:
+    // https://bugzilla.mozilla.org/show_bug.cgi?id=497780
+    if (goog.userAgent.GECKO) {
+      if (!goog.reflect.canAccessProperty(relatedTarget, 'nodeName')) {
+        relatedTarget = null;
+      }
+    }
+    // TODO(arv): Use goog.events.EventType when it has been refactored into its
+    // own file.
+  } else if (type == goog.events.EventType.MOUSEOVER) {
+    relatedTarget = e.fromElement;
+  } else if (type == goog.events.EventType.MOUSEOUT) {
+    relatedTarget = e.toElement;
+  }
+
+  this.relatedTarget = relatedTarget;
+
+  if (!goog.isNull(relevantTouch)) {
+    this.clientX = relevantTouch.clientX !== undefined ? relevantTouch.clientX :
+                                                         relevantTouch.pageX;
+    this.clientY = relevantTouch.clientY !== undefined ? relevantTouch.clientY :
+                                                         relevantTouch.pageY;
+    this.screenX = relevantTouch.screenX || 0;
+    this.screenY = relevantTouch.screenY || 0;
+  } else {
+    // Webkit emits a lame warning whenever layerX/layerY is accessed.
+    // http://code.google.com/p/chromium/issues/detail?id=101733
+    this.offsetX = (goog.userAgent.WEBKIT || e.offsetX !== undefined) ?
+        e.offsetX :
+        e.layerX;
+    this.offsetY = (goog.userAgent.WEBKIT || e.offsetY !== undefined) ?
+        e.offsetY :
+        e.layerY;
+    this.clientX = e.clientX !== undefined ? e.clientX : e.pageX;
+    this.clientY = e.clientY !== undefined ? e.clientY : e.pageY;
+    this.screenX = e.screenX || 0;
+    this.screenY = e.screenY || 0;
+  }
+
+  this.button = e.button;
+
+  this.keyCode = e.keyCode || 0;
+  this.charCode = e.charCode || (type == 'keypress' ? e.keyCode : 0);
+  this.ctrlKey = e.ctrlKey;
+  this.altKey = e.altKey;
+  this.shiftKey = e.shiftKey;
+  this.metaKey = e.metaKey;
+  this.platformModifierKey = goog.userAgent.MAC ? e.metaKey : e.ctrlKey;
+  this.state = e.state;
+  this.event_ = e;
+  if (e.defaultPrevented) {
+    this.preventDefault();
+  }
+};
+
+
+/**
+ * Tests to see which button was pressed during the event. This is really only
+ * useful in IE and Gecko browsers. And in IE, it's only useful for
+ * mousedown/mouseup events, because click only fires for the left mouse button.
+ *
+ * Safari 2 only reports the left button being clicked, and uses the value '1'
+ * instead of 0. Opera only reports a mousedown event for the middle button, and
+ * no mouse events for the right button. Opera has default behavior for left and
+ * middle click that can only be overridden via a configuration setting.
+ *
+ * There's a nice table of this mess at http://www.unixpapa.com/js/mouse.html.
+ *
+ * @param {goog.events.BrowserEvent.MouseButton} button The button
+ *     to test for.
+ * @return {boolean} True if button was pressed.
+ */
+goog.events.BrowserEvent.prototype.isButton = function(button) {
+  if (!goog.events.BrowserFeature.HAS_W3C_BUTTON) {
+    if (this.type == 'click') {
+      return button == goog.events.BrowserEvent.MouseButton.LEFT;
+    } else {
+      return !!(
+          this.event_.button & goog.events.BrowserEvent.IEButtonMap[button]);
+    }
+  } else {
+    return this.event_.button == button;
+  }
+};
+
+
+/**
+ * Whether this has an "action"-producing mouse button.
+ *
+ * By definition, this includes left-click on windows/linux, and left-click
+ * without the ctrl key on Macs.
+ *
+ * @return {boolean} The result.
+ */
+goog.events.BrowserEvent.prototype.isMouseActionButton = function() {
+  // Webkit does not ctrl+click to be a right-click, so we
+  // normalize it to behave like Gecko and Opera.
+  return this.isButton(goog.events.BrowserEvent.MouseButton.LEFT) &&
+      !(goog.userAgent.WEBKIT && goog.userAgent.MAC && this.ctrlKey);
+};
+
+
+/**
+ * @override
+ */
+goog.events.BrowserEvent.prototype.stopPropagation = function() {
+  goog.events.BrowserEvent.superClass_.stopPropagation.call(this);
+  if (this.event_.stopPropagation) {
+    this.event_.stopPropagation();
+  } else {
+    this.event_.cancelBubble = true;
+  }
+};
+
+
+/**
+ * @override
+ */
+goog.events.BrowserEvent.prototype.preventDefault = function() {
+  goog.events.BrowserEvent.superClass_.preventDefault.call(this);
+  var be = this.event_;
+  if (!be.preventDefault) {
+    be.returnValue = false;
+    if (goog.events.BrowserFeature.SET_KEY_CODE_TO_PREVENT_DEFAULT) {
+      /** @preserveTry */
+      try {
+        // Most keys can be prevented using returnValue. Some special keys
+        // require setting the keyCode to -1 as well:
+        //
+        // In IE7:
+        // F3, F5, F10, F11, Ctrl+P, Crtl+O, Ctrl+F (these are taken from IE6)
+        //
+        // In IE8:
+        // Ctrl+P, Crtl+O, Ctrl+F (F1-F12 cannot be stopped through the event)
+        //
+        // We therefore do this for all function keys as well as when Ctrl key
+        // is pressed.
+        var VK_F1 = 112;
+        var VK_F12 = 123;
+        if (be.ctrlKey || be.keyCode >= VK_F1 && be.keyCode <= VK_F12) {
+          be.keyCode = -1;
+        }
+      } catch (ex) {
+        // IE throws an 'access denied' exception when trying to change
+        // keyCode in some situations (e.g. srcElement is input[type=file],
+        // or srcElement is an anchor tag rewritten by parent's innerHTML).
+        // Do nothing in this case.
+      }
+    }
+  } else {
+    be.preventDefault();
+  }
+};
+
+
+/**
+ * @return {Event} The underlying browser event object.
+ */
+goog.events.BrowserEvent.prototype.getBrowserEvent = function() {
+  return this.event_;
+};
diff --git a/assets/viz/2/goog/events/browserfeature.js b/assets/viz/2/goog/events/browserfeature.js
new file mode 100644
index 0000000..4cfa8e3
--- /dev/null
+++ b/assets/viz/2/goog/events/browserfeature.js
@@ -0,0 +1,84 @@
+// Copyright 2010 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Browser capability checks for the events package.
+ *
+ */
+
+
+goog.provide('goog.events.BrowserFeature');
+
+goog.require('goog.userAgent');
+
+
+/**
+ * Enum of browser capabilities.
+ * @enum {boolean}
+ */
+goog.events.BrowserFeature = {
+  /**
+   * Whether the button attribute of the event is W3C compliant.  False in
+   * Internet Explorer prior to version 9; document-version dependent.
+   */
+  HAS_W3C_BUTTON:
+      !goog.userAgent.IE || goog.userAgent.isDocumentModeOrHigher(9),
+
+  /**
+   * Whether the browser supports full W3C event model.
+   */
+  HAS_W3C_EVENT_SUPPORT:
+      !goog.userAgent.IE || goog.userAgent.isDocumentModeOrHigher(9),
+
+  /**
+   * To prevent default in IE7-8 for certain keydown events we need set the
+   * keyCode to -1.
+   */
+  SET_KEY_CODE_TO_PREVENT_DEFAULT:
+      goog.userAgent.IE && !goog.userAgent.isVersionOrHigher('9'),
+
+  /**
+   * Whether the {@code navigator.onLine} property is supported.
+   */
+  HAS_NAVIGATOR_ONLINE_PROPERTY:
+      !goog.userAgent.WEBKIT || goog.userAgent.isVersionOrHigher('528'),
+
+  /**
+   * Whether HTML5 network online/offline events are supported.
+   */
+  HAS_HTML5_NETWORK_EVENT_SUPPORT:
+      goog.userAgent.GECKO && goog.userAgent.isVersionOrHigher('1.9b') ||
+      goog.userAgent.IE && goog.userAgent.isVersionOrHigher('8') ||
+      goog.userAgent.OPERA && goog.userAgent.isVersionOrHigher('9.5') ||
+      goog.userAgent.WEBKIT && goog.userAgent.isVersionOrHigher('528'),
+
+  /**
+   * Whether HTML5 network events fire on document.body, or otherwise the
+   * window.
+   */
+  HTML5_NETWORK_EVENTS_FIRE_ON_BODY:
+      goog.userAgent.GECKO && !goog.userAgent.isVersionOrHigher('8') ||
+      goog.userAgent.IE && !goog.userAgent.isVersionOrHigher('9'),
+
+  /**
+   * Whether touch is enabled in the browser.
+   */
+  TOUCH_ENABLED:
+      ('ontouchstart' in goog.global ||
+       !!(goog.global['document'] && document.documentElement &&
+          'ontouchstart' in document.documentElement) ||
+       // IE10 uses non-standard touch events, so it has a different check.
+       !!(goog.global['navigator'] &&
+          goog.global['navigator']['msMaxTouchPoints']))
+};
diff --git a/assets/viz/2/goog/events/event.js b/assets/viz/2/goog/events/event.js
new file mode 100644
index 0000000..89db91e
--- /dev/null
+++ b/assets/viz/2/goog/events/event.js
@@ -0,0 +1,145 @@
+// Copyright 2005 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview A base class for event objects.
+ *
+ */
+
+
+goog.provide('goog.events.Event');
+goog.provide('goog.events.EventLike');
+
+/**
+ * goog.events.Event no longer depends on goog.Disposable. Keep requiring
+ * goog.Disposable here to not break projects which assume this dependency.
+ * @suppress {extraRequire}
+ */
+goog.require('goog.Disposable');
+goog.require('goog.events.EventId');
+
+
+/**
+ * A typedef for event like objects that are dispatchable via the
+ * goog.events.dispatchEvent function. strings are treated as the type for a
+ * goog.events.Event. Objects are treated as an extension of a new
+ * goog.events.Event with the type property of the object being used as the type
+ * of the Event.
+ * @typedef {string|Object|goog.events.Event|goog.events.EventId}
+ */
+goog.events.EventLike;
+
+
+
+/**
+ * A base class for event objects, so that they can support preventDefault and
+ * stopPropagation.
+ *
+ * @suppress {underscore} Several properties on this class are technically
+ *     public, but referencing these properties outside this package is strongly
+ *     discouraged.
+ *
+ * @param {string|!goog.events.EventId} type Event Type.
+ * @param {Object=} opt_target Reference to the object that is the target of
+ *     this event. It has to implement the {@code EventTarget} interface
+ *     declared at {@link http://developer.mozilla.org/en/DOM/EventTarget}.
+ * @constructor
+ */
+goog.events.Event = function(type, opt_target) {
+  /**
+   * Event type.
+   * @type {string}
+   */
+  this.type = type instanceof goog.events.EventId ? String(type) : type;
+
+  /**
+   * TODO(tbreisacher): The type should probably be
+   * EventTarget|goog.events.EventTarget.
+   *
+   * Target of the event.
+   * @type {Object|undefined}
+   */
+  this.target = opt_target;
+
+  /**
+   * Object that had the listener attached.
+   * @type {Object|undefined}
+   */
+  this.currentTarget = this.target;
+
+  /**
+   * Whether to cancel the event in internal capture/bubble processing for IE.
+   * @type {boolean}
+   * @public
+   */
+  this.propagationStopped_ = false;
+
+  /**
+   * Whether the default action has been prevented.
+   * This is a property to match the W3C specification at
+   * {@link http://www.w3.org/TR/DOM-Level-3-Events/
+   * #events-event-type-defaultPrevented}.
+   * Must be treated as read-only outside the class.
+   * @type {boolean}
+   */
+  this.defaultPrevented = false;
+
+  /**
+   * Return value for in internal capture/bubble processing for IE.
+   * @type {boolean}
+   * @public
+   * @suppress {underscore|visibility} Technically public, but referencing this
+   *     outside this package is strongly discouraged.
+   */
+  this.returnValue_ = true;
+};
+
+
+/**
+ * Stops event propagation.
+ */
+goog.events.Event.prototype.stopPropagation = function() {
+  this.propagationStopped_ = true;
+};
+
+
+/**
+ * Prevents the default action, for example a link redirecting to a url.
+ */
+goog.events.Event.prototype.preventDefault = function() {
+  this.defaultPrevented = true;
+  this.returnValue_ = false;
+};
+
+
+/**
+ * Stops the propagation of the event. It is equivalent to
+ * {@code e.stopPropagation()}, but can be used as the callback argument of
+ * {@link goog.events.listen} without declaring another function.
+ * @param {!goog.events.Event} e An event.
+ */
+goog.events.Event.stopPropagation = function(e) {
+  e.stopPropagation();
+};
+
+
+/**
+ * Prevents the default action. It is equivalent to
+ * {@code e.preventDefault()}, but can be used as the callback argument of
+ * {@link goog.events.listen} without declaring another function.
+ * @param {!goog.events.Event} e An event.
+ */
+goog.events.Event.preventDefault = function(e) {
+  e.preventDefault();
+};
diff --git a/assets/viz/2/goog/events/eventid.js b/assets/viz/2/goog/events/eventid.js
new file mode 100644
index 0000000..9ff9e40
--- /dev/null
+++ b/assets/viz/2/goog/events/eventid.js
@@ -0,0 +1,46 @@
+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+goog.provide('goog.events.EventId');
+
+
+
+/**
+ * A templated class that is used when registering for events. Typical usage:
+ *
+ *    /** @type {goog.events.EventId<MyEventObj>} *\
+ *    var myEventId = new goog.events.EventId(
+ *        goog.events.getUniqueId(('someEvent'));
+ *
+ *    // No need to cast or declare here since the compiler knows the
+ *    // correct type of 'evt' (MyEventObj).
+ *    something.listen(myEventId, function(evt) {});
+ *
+ * @param {string} eventId
+ * @template T
+ * @constructor
+ * @struct
+ * @final
+ */
+goog.events.EventId = function(eventId) {
+  /** @const */ this.id = eventId;
+};
+
+
+/**
+ * @override
+ */
+goog.events.EventId.prototype.toString = function() {
+  return this.id;
+};
diff --git a/assets/viz/2/goog/events/events.js b/assets/viz/2/goog/events/events.js
new file mode 100644
index 0000000..6a0acf7
--- /dev/null
+++ b/assets/viz/2/goog/events/events.js
@@ -0,0 +1,989 @@
+// Copyright 2005 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview An event manager for both native browser event
+ * targets and custom JavaScript event targets
+ * ({@code goog.events.Listenable}). This provides an abstraction
+ * over browsers' event systems.
+ *
+ * It also provides a simulation of W3C event model's capture phase in
+ * Internet Explorer (IE 8 and below). Caveat: the simulation does not
+ * interact well with listeners registered directly on the elements
+ * (bypassing goog.events) or even with listeners registered via
+ * goog.events in a separate JS binary. In these cases, we provide
+ * no ordering guarantees.
+ *
+ * The listeners will receive a "patched" event object. Such event object
+ * contains normalized values for certain event properties that differs in
+ * different browsers.
+ *
+ * Example usage:
+ * <pre>
+ * goog.events.listen(myNode, 'click', function(e) { alert('woo') });
+ * goog.events.listen(myNode, 'mouseover', mouseHandler, true);
+ * goog.events.unlisten(myNode, 'mouseover', mouseHandler, true);
+ * goog.events.removeAll(myNode);
+ * </pre>
+ *
+ *                                            in IE and event object patching]
+ * @author arv@google.com (Erik Arvidsson)
+ *
+ * @see ../demos/events.html
+ * @see ../demos/event-propagation.html
+ * @see ../demos/stopevent.html
+ */
+
+// IMPLEMENTATION NOTES:
+// goog.events stores an auxiliary data structure on each EventTarget
+// source being listened on. This allows us to take advantage of GC,
+// having the data structure GC'd when the EventTarget is GC'd. This
+// GC behavior is equivalent to using W3C DOM Events directly.
+
+goog.provide('goog.events');
+goog.provide('goog.events.CaptureSimulationMode');
+goog.provide('goog.events.Key');
+goog.provide('goog.events.ListenableType');
+
+goog.require('goog.asserts');
+goog.require('goog.debug.entryPointRegistry');
+goog.require('goog.events.BrowserEvent');
+goog.require('goog.events.BrowserFeature');
+goog.require('goog.events.Listenable');
+goog.require('goog.events.ListenerMap');
+
+goog.forwardDeclare('goog.debug.ErrorHandler');
+goog.forwardDeclare('goog.events.EventWrapper');
+
+
+/**
+ * @typedef {number|goog.events.ListenableKey}
+ */
+goog.events.Key;
+
+
+/**
+ * @typedef {EventTarget|goog.events.Listenable}
+ */
+goog.events.ListenableType;
+
+
+/**
+ * Property name on a native event target for the listener map
+ * associated with the event target.
+ * @private @const {string}
+ */
+goog.events.LISTENER_MAP_PROP_ = 'closure_lm_' + ((Math.random() * 1e6) | 0);
+
+
+/**
+ * String used to prepend to IE event types.
+ * @const
+ * @private
+ */
+goog.events.onString_ = 'on';
+
+
+/**
+ * Map of computed "on<eventname>" strings for IE event types. Caching
+ * this removes an extra object allocation in goog.events.listen which
+ * improves IE6 performance.
+ * @const
+ * @dict
+ * @private
+ */
+goog.events.onStringMap_ = {};
+
+
+/**
+ * @enum {number} Different capture simulation mode for IE8-.
+ */
+goog.events.CaptureSimulationMode = {
+  /**
+   * Does not perform capture simulation. Will asserts in IE8- when you
+   * add capture listeners.
+   */
+  OFF_AND_FAIL: 0,
+
+  /**
+   * Does not perform capture simulation, silently ignore capture
+   * listeners.
+   */
+  OFF_AND_SILENT: 1,
+
+  /**
+   * Performs capture simulation.
+   */
+  ON: 2
+};
+
+
+/**
+ * @define {number} The capture simulation mode for IE8-. By default,
+ *     this is ON.
+ */
+goog.define('goog.events.CAPTURE_SIMULATION_MODE', 2);
+
+
+/**
+ * Estimated count of total native listeners.
+ * @private {number}
+ */
+goog.events.listenerCountEstimate_ = 0;
+
+
+/**
+ * Adds an event listener for a specific event on a native event
+ * target (such as a DOM element) or an object that has implemented
+ * {@link goog.events.Listenable}. A listener can only be added once
+ * to an object and if it is added again the key for the listener is
+ * returned. Note that if the existing listener is a one-off listener
+ * (registered via listenOnce), it will no longer be a one-off
+ * listener after a call to listen().
+ *
+ * @param {EventTarget|goog.events.Listenable} src The node to listen
+ *     to events on.
+ * @param {string|Array<string>|
+ *     !goog.events.EventId<EVENTOBJ>|!Array<!goog.events.EventId<EVENTOBJ>>}
+ *     type Event type or array of event types.
+ * @param {function(this:T, EVENTOBJ):?|{handleEvent:function(?):?}|null}
+ *     listener Callback method, or an object with a handleEvent function.
+ *     WARNING: passing an Object is now softly deprecated.
+ * @param {boolean=} opt_capt Whether to fire in capture phase (defaults to
+ *     false).
+ * @param {T=} opt_handler Element in whose scope to call the listener.
+ * @return {goog.events.Key} Unique key for the listener.
+ * @template T,EVENTOBJ
+ */
+goog.events.listen = function(src, type, listener, opt_capt, opt_handler) {
+  if (goog.isArray(type)) {
+    for (var i = 0; i < type.length; i++) {
+      goog.events.listen(src, type[i], listener, opt_capt, opt_handler);
+    }
+    return null;
+  }
+
+  listener = goog.events.wrapListener(listener);
+  if (goog.events.Listenable.isImplementedBy(src)) {
+    return src.listen(
+        /** @type {string|!goog.events.EventId} */ (type), listener, opt_capt,
+        opt_handler);
+  } else {
+    return goog.events.listen_(
+        /** @type {!EventTarget} */ (src),
+        /** @type {string|!goog.events.EventId} */ (type), listener,
+        /* callOnce */ false, opt_capt, opt_handler);
+  }
+};
+
+
+/**
+ * Adds an event listener for a specific event on a native event
+ * target. A listener can only be added once to an object and if it
+ * is added again the key for the listener is returned.
+ *
+ * Note that a one-off listener will not change an existing listener,
+ * if any. On the other hand a normal listener will change existing
+ * one-off listener to become a normal listener.
+ *
+ * @param {EventTarget} src The node to listen to events on.
+ * @param {string|!goog.events.EventId} type Event type.
+ * @param {!Function} listener Callback function.
+ * @param {boolean} callOnce Whether the listener is a one-off
+ *     listener or otherwise.
+ * @param {boolean=} opt_capt Whether to fire in capture phase (defaults to
+ *     false).
+ * @param {Object=} opt_handler Element in whose scope to call the listener.
+ * @return {goog.events.ListenableKey} Unique key for the listener.
+ * @private
+ */
+goog.events.listen_ = function(
+    src, type, listener, callOnce, opt_capt, opt_handler) {
+  if (!type) {
+    throw Error('Invalid event type');
+  }
+
+  var capture = !!opt_capt;
+  if (capture && !goog.events.BrowserFeature.HAS_W3C_EVENT_SUPPORT) {
+    if (goog.events.CAPTURE_SIMULATION_MODE ==
+        goog.events.CaptureSimulationMode.OFF_AND_FAIL) {
+      goog.asserts.fail('Can not register capture listener in IE8-.');
+      return null;
+    } else if (
+        goog.events.CAPTURE_SIMULATION_MODE ==
+        goog.events.CaptureSimulationMode.OFF_AND_SILENT) {
+      return null;
+    }
+  }
+
+  var listenerMap = goog.events.getListenerMap_(src);
+  if (!listenerMap) {
+    src[goog.events.LISTENER_MAP_PROP_] = listenerMap =
+        new goog.events.ListenerMap(src);
+  }
+
+  var listenerObj =
+      listenerMap.add(type, listener, callOnce, opt_capt, opt_handler);
+
+  // If the listenerObj already has a proxy, it has been set up
+  // previously. We simply return.
+  if (listenerObj.proxy) {
+    return listenerObj;
+  }
+
+  var proxy = goog.events.getProxy();
+  listenerObj.proxy = proxy;
+
+  proxy.src = src;
+  proxy.listener = listenerObj;
+
+  // Attach the proxy through the browser's API
+  if (src.addEventListener) {
+    src.addEventListener(type.toString(), proxy, capture);
+  } else if (src.attachEvent) {
+    // The else if above used to be an unconditional else. It would call
+    // exception on IE11, spoiling the day of some callers. The previous
+    // incarnation of this code, from 2007, indicates that it replaced an
+    // earlier still version that caused excess allocations on IE6.
+    src.attachEvent(goog.events.getOnString_(type.toString()), proxy);
+  } else {
+    throw Error('addEventListener and attachEvent are unavailable.');
+  }
+
+  goog.events.listenerCountEstimate_++;
+  return listenerObj;
+};
+
+
+/**
+ * Helper function for returning a proxy function.
+ * @return {!Function} A new or reused function object.
+ */
+goog.events.getProxy = function() {
+  var proxyCallbackFunction = goog.events.handleBrowserEvent_;
+  // Use a local var f to prevent one allocation.
+  var f =
+      goog.events.BrowserFeature.HAS_W3C_EVENT_SUPPORT ? function(eventObject) {
+        return proxyCallbackFunction.call(f.src, f.listener, eventObject);
+      } : function(eventObject) {
+        var v = proxyCallbackFunction.call(f.src, f.listener, eventObject);
+        // NOTE(chrishenry): In IE, we hack in a capture phase. However, if
+        // there is inline event handler which tries to prevent default (for
+        // example <a href="..." onclick="return false">...</a>) in a
+        // descendant element, the prevent default will be overridden
+        // by this listener if this listener were to return true. Hence, we
+        // return undefined.
+        if (!v) return v;
+      };
+  return f;
+};
+
+
+/**
+ * Adds an event listener for a specific event on a native event
+ * target (such as a DOM element) or an object that has implemented
+ * {@link goog.events.Listenable}. After the event has fired the event
+ * listener is removed from the target.
+ *
+ * If an existing listener already exists, listenOnce will do
+ * nothing. In particular, if the listener was previously registered
+ * via listen(), listenOnce() will not turn the listener into a
+ * one-off listener. Similarly, if there is already an existing
+ * one-off listener, listenOnce does not modify the listeners (it is
+ * still a once listener).
+ *
+ * @param {EventTarget|goog.events.Listenable} src The node to listen
+ *     to events on.
+ * @param {string|Array<string>|
+ *     !goog.events.EventId<EVENTOBJ>|!Array<!goog.events.EventId<EVENTOBJ>>}
+ *     type Event type or array of event types.
+ * @param {function(this:T, EVENTOBJ):?|{handleEvent:function(?):?}|null}
+ *     listener Callback method.
+ * @param {boolean=} opt_capt Fire in capture phase?.
+ * @param {T=} opt_handler Element in whose scope to call the listener.
+ * @return {goog.events.Key} Unique key for the listener.
+ * @template T,EVENTOBJ
+ */
+goog.events.listenOnce = function(src, type, listener, opt_capt, opt_handler) {
+  if (goog.isArray(type)) {
+    for (var i = 0; i < type.length; i++) {
+      goog.events.listenOnce(src, type[i], listener, opt_capt, opt_handler);
+    }
+    return null;
+  }
+
+  listener = goog.events.wrapListener(listener);
+  if (goog.events.Listenable.isImplementedBy(src)) {
+    return src.listenOnce(
+        /** @type {string|!goog.events.EventId} */ (type), listener, opt_capt,
+        opt_handler);
+  } else {
+    return goog.events.listen_(
+        /** @type {!EventTarget} */ (src),
+        /** @type {string|!goog.events.EventId} */ (type), listener,
+        /* callOnce */ true, opt_capt, opt_handler);
+  }
+};
+
+
+/**
+ * Adds an event listener with a specific event wrapper on a DOM Node or an
+ * object that has implemented {@link goog.events.Listenable}. A listener can
+ * only be added once to an object.
+ *
+ * @param {EventTarget|goog.events.Listenable} src The target to
+ *     listen to events on.
+ * @param {goog.events.EventWrapper} wrapper Event wrapper to use.
+ * @param {function(this:T, ?):?|{handleEvent:function(?):?}|null} listener
+ *     Callback method, or an object with a handleEvent function.
+ * @param {boolean=} opt_capt Whether to fire in capture phase (defaults to
+ *     false).
+ * @param {T=} opt_handler Element in whose scope to call the listener.
+ * @template T
+ */
+goog.events.listenWithWrapper = function(
+    src, wrapper, listener, opt_capt, opt_handler) {
+  wrapper.listen(src, listener, opt_capt, opt_handler);
+};
+
+
+/**
+ * Removes an event listener which was added with listen().
+ *
+ * @param {EventTarget|goog.events.Listenable} src The target to stop
+ *     listening to events on.
+ * @param {string|Array<string>|
+ *     !goog.events.EventId<EVENTOBJ>|!Array<!goog.events.EventId<EVENTOBJ>>}
+ *     type Event type or array of event types to unlisten to.
+ * @param {function(?):?|{handleEvent:function(?):?}|null} listener The
+ *     listener function to remove.
+ * @param {boolean=} opt_capt In DOM-compliant browsers, this determines
+ *     whether the listener is fired during the capture or bubble phase of the
+ *     event.
+ * @param {Object=} opt_handler Element in whose scope to call the listener.
+ * @return {?boolean} indicating whether the listener was there to remove.
+ * @template EVENTOBJ
+ */
+goog.events.unlisten = function(src, type, listener, opt_capt, opt_handler) {
+  if (goog.isArray(type)) {
+    for (var i = 0; i < type.length; i++) {
+      goog.events.unlisten(src, type[i], listener, opt_capt, opt_handler);
+    }
+    return null;
+  }
+
+  listener = goog.events.wrapListener(listener);
+  if (goog.events.Listenable.isImplementedBy(src)) {
+    return src.unlisten(
+        /** @type {string|!goog.events.EventId} */ (type), listener, opt_capt,
+        opt_handler);
+  }
+
+  if (!src) {
+    // TODO(chrishenry): We should tighten the API to only accept
+    // non-null objects, or add an assertion here.
+    return false;
+  }
+
+  var capture = !!opt_capt;
+  var listenerMap = goog.events.getListenerMap_(
+      /** @type {!EventTarget} */ (src));
+  if (listenerMap) {
+    var listenerObj = listenerMap.getListener(
+        /** @type {string|!goog.events.EventId} */ (type), listener, capture,
+        opt_handler);
+    if (listenerObj) {
+      return goog.events.unlistenByKey(listenerObj);
+    }
+  }
+
+  return false;
+};
+
+
+/**
+ * Removes an event listener which was added with listen() by the key
+ * returned by listen().
+ *
+ * @param {goog.events.Key} key The key returned by listen() for this
+ *     event listener.
+ * @return {boolean} indicating whether the listener was there to remove.
+ */
+goog.events.unlistenByKey = function(key) {
+  // TODO(chrishenry): Remove this check when tests that rely on this
+  // are fixed.
+  if (goog.isNumber(key)) {
+    return false;
+  }
+
+  var listener = key;
+  if (!listener || listener.removed) {
+    return false;
+  }
+
+  var src = listener.src;
+  if (goog.events.Listenable.isImplementedBy(src)) {
+    return /** @type {!goog.events.Listenable} */ (src).unlistenByKey(listener);
+  }
+
+  var type = listener.type;
+  var proxy = listener.proxy;
+  if (src.removeEventListener) {
+    src.removeEventListener(type, proxy, listener.capture);
+  } else if (src.detachEvent) {
+    src.detachEvent(goog.events.getOnString_(type), proxy);
+  }
+  goog.events.listenerCountEstimate_--;
+
+  var listenerMap = goog.events.getListenerMap_(
+      /** @type {!EventTarget} */ (src));
+  // TODO(chrishenry): Try to remove this conditional and execute the
+  // first branch always. This should be safe.
+  if (listenerMap) {
+    listenerMap.removeByKey(listener);
+    if (listenerMap.getTypeCount() == 0) {
+      // Null the src, just because this is simple to do (and useful
+      // for IE <= 7).
+      listenerMap.src = null;
+      // We don't use delete here because IE does not allow delete
+      // on a window object.
+      src[goog.events.LISTENER_MAP_PROP_] = null;
+    }
+  } else {
+    listener.markAsRemoved();
+  }
+
+  return true;
+};
+
+
+/**
+ * Removes an event listener which was added with listenWithWrapper().
+ *
+ * @param {EventTarget|goog.events.Listenable} src The target to stop
+ *     listening to events on.
+ * @param {goog.events.EventWrapper} wrapper Event wrapper to use.
+ * @param {function(?):?|{handleEvent:function(?):?}|null} listener The
+ *     listener function to remove.
+ * @param {boolean=} opt_capt In DOM-compliant browsers, this determines
+ *     whether the listener is fired during the capture or bubble phase of the
+ *     event.
+ * @param {Object=} opt_handler Element in whose scope to call the listener.
+ */
+goog.events.unlistenWithWrapper = function(
+    src, wrapper, listener, opt_capt, opt_handler) {
+  wrapper.unlisten(src, listener, opt_capt, opt_handler);
+};
+
+
+/**
+ * Removes all listeners from an object. You can also optionally
+ * remove listeners of a particular type.
+ *
+ * @param {Object|undefined} obj Object to remove listeners from. Must be an
+ *     EventTarget or a goog.events.Listenable.
+ * @param {string|!goog.events.EventId=} opt_type Type of event to remove.
+ *     Default is all types.
+ * @return {number} Number of listeners removed.
+ */
+goog.events.removeAll = function(obj, opt_type) {
+  // TODO(chrishenry): Change the type of obj to
+  // (!EventTarget|!goog.events.Listenable).
+
+  if (!obj) {
+    return 0;
+  }
+
+  if (goog.events.Listenable.isImplementedBy(obj)) {
+    return /** @type {?} */ (obj).removeAllListeners(opt_type);
+  }
+
+  var listenerMap = goog.events.getListenerMap_(
+      /** @type {!EventTarget} */ (obj));
+  if (!listenerMap) {
+    return 0;
+  }
+
+  var count = 0;
+  var typeStr = opt_type && opt_type.toString();
+  for (var type in listenerMap.listeners) {
+    if (!typeStr || type == typeStr) {
+      // Clone so that we don't need to worry about unlistenByKey
+      // changing the content of the ListenerMap.
+      var listeners = listenerMap.listeners[type].concat();
+      for (var i = 0; i < listeners.length; ++i) {
+        if (goog.events.unlistenByKey(listeners[i])) {
+          ++count;
+        }
+      }
+    }
+  }
+  return count;
+};
+
+
+/**
+ * Gets the listeners for a given object, type and capture phase.
+ *
+ * @param {Object} obj Object to get listeners for.
+ * @param {string|!goog.events.EventId} type Event type.
+ * @param {boolean} capture Capture phase?.
+ * @return {Array<!goog.events.Listener>} Array of listener objects.
+ */
+goog.events.getListeners = function(obj, type, capture) {
+  if (goog.events.Listenable.isImplementedBy(obj)) {
+    return /** @type {!goog.events.Listenable} */ (obj).getListeners(
+        type, capture);
+  } else {
+    if (!obj) {
+      // TODO(chrishenry): We should tighten the API to accept
+      // !EventTarget|goog.events.Listenable, and add an assertion here.
+      return [];
+    }
+
+    var listenerMap = goog.events.getListenerMap_(
+        /** @type {!EventTarget} */ (obj));
+    return listenerMap ? listenerMap.getListeners(type, capture) : [];
+  }
+};
+
+
+/**
+ * Gets the goog.events.Listener for the event or null if no such listener is
+ * in use.
+ *
+ * @param {EventTarget|goog.events.Listenable} src The target from
+ *     which to get listeners.
+ * @param {?string|!goog.events.EventId<EVENTOBJ>} type The type of the event.
+ * @param {function(EVENTOBJ):?|{handleEvent:function(?):?}|null} listener The
+ *     listener function to get.
+ * @param {boolean=} opt_capt In DOM-compliant browsers, this determines
+ *                            whether the listener is fired during the
+ *                            capture or bubble phase of the event.
+ * @param {Object=} opt_handler Element in whose scope to call the listener.
+ * @return {goog.events.ListenableKey} the found listener or null if not found.
+ * @template EVENTOBJ
+ */
+goog.events.getListener = function(src, type, listener, opt_capt, opt_handler) {
+  // TODO(chrishenry): Change type from ?string to string, or add assertion.
+  type = /** @type {string} */ (type);
+  listener = goog.events.wrapListener(listener);
+  var capture = !!opt_capt;
+  if (goog.events.Listenable.isImplementedBy(src)) {
+    return src.getListener(type, listener, capture, opt_handler);
+  }
+
+  if (!src) {
+    // TODO(chrishenry): We should tighten the API to only accept
+    // non-null objects, or add an assertion here.
+    return null;
+  }
+
+  var listenerMap = goog.events.getListenerMap_(
+      /** @type {!EventTarget} */ (src));
+  if (listenerMap) {
+    return listenerMap.getListener(type, listener, capture, opt_handler);
+  }
+  return null;
+};
+
+
+/**
+ * Returns whether an event target has any active listeners matching the
+ * specified signature. If either the type or capture parameters are
+ * unspecified, the function will match on the remaining criteria.
+ *
+ * @param {EventTarget|goog.events.Listenable} obj Target to get
+ *     listeners for.
+ * @param {string|!goog.events.EventId=} opt_type Event type.
+ * @param {boolean=} opt_capture Whether to check for capture or bubble-phase
+ *     listeners.
+ * @return {boolean} Whether an event target has one or more listeners matching
+ *     the requested type and/or capture phase.
+ */
+goog.events.hasListener = function(obj, opt_type, opt_capture) {
+  if (goog.events.Listenable.isImplementedBy(obj)) {
+    return obj.hasListener(opt_type, opt_capture);
+  }
+
+  var listenerMap = goog.events.getListenerMap_(
+      /** @type {!EventTarget} */ (obj));
+  return !!listenerMap && listenerMap.hasListener(opt_type, opt_capture);
+};
+
+
+/**
+ * Provides a nice string showing the normalized event objects public members
+ * @param {Object} e Event Object.
+ * @return {string} String of the public members of the normalized event object.
+ */
+goog.events.expose = function(e) {
+  var str = [];
+  for (var key in e) {
+    if (e[key] && e[key].id) {
+      str.push(key + ' = ' + e[key] + ' (' + e[key].id + ')');
+    } else {
+      str.push(key + ' = ' + e[key]);
+    }
+  }
+  return str.join('\n');
+};
+
+
+/**
+ * Returns a string with on prepended to the specified type. This is used for IE
+ * which expects "on" to be prepended. This function caches the string in order
+ * to avoid extra allocations in steady state.
+ * @param {string} type Event type.
+ * @return {string} The type string with 'on' prepended.
+ * @private
+ */
+goog.events.getOnString_ = function(type) {
+  if (type in goog.events.onStringMap_) {
+    return goog.events.onStringMap_[type];
+  }
+  return goog.events.onStringMap_[type] = goog.events.onString_ + type;
+};
+
+
+/**
+ * Fires an object's listeners of a particular type and phase
+ *
+ * @param {Object} obj Object whose listeners to call.
+ * @param {string|!goog.events.EventId} type Event type.
+ * @param {boolean} capture Which event phase.
+ * @param {Object} eventObject Event object to be passed to listener.
+ * @return {boolean} True if all listeners returned true else false.
+ */
+goog.events.fireListeners = function(obj, type, capture, eventObject) {
+  if (goog.events.Listenable.isImplementedBy(obj)) {
+    return /** @type {!goog.events.Listenable} */ (obj).fireListeners(
+        type, capture, eventObject);
+  }
+
+  return goog.events.fireListeners_(obj, type, capture, eventObject);
+};
+
+
+/**
+ * Fires an object's listeners of a particular type and phase.
+ * @param {Object} obj Object whose listeners to call.
+ * @param {string|!goog.events.EventId} type Event type.
+ * @param {boolean} capture Which event phase.
+ * @param {Object} eventObject Event object to be passed to listener.
+ * @return {boolean} True if all listeners returned true else false.
+ * @private
+ */
+goog.events.fireListeners_ = function(obj, type, capture, eventObject) {
+  /** @type {boolean} */
+  var retval = true;
+
+  var listenerMap = goog.events.getListenerMap_(
+      /** @type {EventTarget} */ (obj));
+  if (listenerMap) {
+    // TODO(chrishenry): Original code avoids array creation when there
+    // is no listener, so we do the same. If this optimization turns
+    // out to be not required, we can replace this with
+    // listenerMap.getListeners(type, capture) instead, which is simpler.
+    var listenerArray = listenerMap.listeners[type.toString()];
+    if (listenerArray) {
+      listenerArray = listenerArray.concat();
+      for (var i = 0; i < listenerArray.length; i++) {
+        var listener = listenerArray[i];
+        // We might not have a listener if the listener was removed.
+        if (listener && listener.capture == capture && !listener.removed) {
+          var result = goog.events.fireListener(listener, eventObject);
+          retval = retval && (result !== false);
+        }
+      }
+    }
+  }
+  return retval;
+};
+
+
+/**
+ * Fires a listener with a set of arguments
+ *
+ * @param {goog.events.Listener} listener The listener object to call.
+ * @param {Object} eventObject The event object to pass to the listener.
+ * @return {boolean} Result of listener.
+ */
+goog.events.fireListener = function(listener, eventObject) {
+  var listenerFn = listener.listener;
+  var listenerHandler = listener.handler || listener.src;
+
+  if (listener.callOnce) {
+    goog.events.unlistenByKey(listener);
+  }
+  return listenerFn.call(listenerHandler, eventObject);
+};
+
+
+/**
+ * Gets the total number of listeners currently in the system.
+ * @return {number} Number of listeners.
+ * @deprecated This returns estimated count, now that Closure no longer
+ * stores a central listener registry. We still return an estimation
+ * to keep existing listener-related tests passing. In the near future,
+ * this function will be removed.
+ */
+goog.events.getTotalListenerCount = function() {
+  return goog.events.listenerCountEstimate_;
+};
+
+
+/**
+ * Dispatches an event (or event like object) and calls all listeners
+ * listening for events of this type. The type of the event is decided by the
+ * type property on the event object.
+ *
+ * If any of the listeners returns false OR calls preventDefault then this
+ * function will return false.  If one of the capture listeners calls
+ * stopPropagation, then the bubble listeners won't fire.
+ *
+ * @param {goog.events.Listenable} src The event target.
+ * @param {goog.events.EventLike} e Event object.
+ * @return {boolean} If anyone called preventDefault on the event object (or
+ *     if any of the handlers returns false) this will also return false.
+ *     If there are no handlers, or if all handlers return true, this returns
+ *     true.
+ */
+goog.events.dispatchEvent = function(src, e) {
+  goog.asserts.assert(
+      goog.events.Listenable.isImplementedBy(src),
+      'Can not use goog.events.dispatchEvent with ' +
+          'non-goog.events.Listenable instance.');
+  return src.dispatchEvent(e);
+};
+
+
+/**
+ * Installs exception protection for the browser event entry point using the
+ * given error handler.
+ *
+ * @param {goog.debug.ErrorHandler} errorHandler Error handler with which to
+ *     protect the entry point.
+ */
+goog.events.protectBrowserEventEntryPoint = function(errorHandler) {
+  goog.events.handleBrowserEvent_ =
+      errorHandler.protectEntryPoint(goog.events.handleBrowserEvent_);
+};
+
+
+/**
+ * Handles an event and dispatches it to the correct listeners. This
+ * function is a proxy for the real listener the user specified.
+ *
+ * @param {goog.events.Listener} listener The listener object.
+ * @param {Event=} opt_evt Optional event object that gets passed in via the
+ *     native event handlers.
+ * @return {boolean} Result of the event handler.
+ * @this {EventTarget} The object or Element that fired the event.
+ * @private
+ */
+goog.events.handleBrowserEvent_ = function(listener, opt_evt) {
+  if (listener.removed) {
+    return true;
+  }
+
+  // Synthesize event propagation if the browser does not support W3C
+  // event model.
+  if (!goog.events.BrowserFeature.HAS_W3C_EVENT_SUPPORT) {
+    var ieEvent = opt_evt ||
+        /** @type {Event} */ (goog.getObjectByName('window.event'));
+    var evt = new goog.events.BrowserEvent(ieEvent, this);
+    /** @type {boolean} */
+    var retval = true;
+
+    if (goog.events.CAPTURE_SIMULATION_MODE ==
+        goog.events.CaptureSimulationMode.ON) {
+      // If we have not marked this event yet, we should perform capture
+      // simulation.
+      if (!goog.events.isMarkedIeEvent_(ieEvent)) {
+        goog.events.markIeEvent_(ieEvent);
+
+        var ancestors = [];
+        for (var parent = evt.currentTarget; parent;
+             parent = parent.parentNode) {
+          ancestors.push(parent);
+        }
+
+        // Fire capture listeners.
+        var type = listener.type;
+        for (var i = ancestors.length - 1; !evt.propagationStopped_ && i >= 0;
+             i--) {
+          evt.currentTarget = ancestors[i];
+          var result =
+              goog.events.fireListeners_(ancestors[i], type, true, evt);
+          retval = retval && result;
+        }
+
+        // Fire bubble listeners.
+        //
+        // We can technically rely on IE to perform bubble event
+        // propagation. However, it turns out that IE fires events in
+        // opposite order of attachEvent registration, which broke
+        // some code and tests that rely on the order. (While W3C DOM
+        // Level 2 Events TR leaves the event ordering unspecified,
+        // modern browsers and W3C DOM Level 3 Events Working Draft
+        // actually specify the order as the registration order.)
+        for (var i = 0; !evt.propagationStopped_ && i < ancestors.length; i++) {
+          evt.currentTarget = ancestors[i];
+          var result =
+              goog.events.fireListeners_(ancestors[i], type, false, evt);
+          retval = retval && result;
+        }
+      }
+    } else {
+      retval = goog.events.fireListener(listener, evt);
+    }
+    return retval;
+  }
+
+  // Otherwise, simply fire the listener.
+  return goog.events.fireListener(
+      listener, new goog.events.BrowserEvent(opt_evt, this));
+};
+
+
+/**
+ * This is used to mark the IE event object so we do not do the Closure pass
+ * twice for a bubbling event.
+ * @param {Event} e The IE browser event.
+ * @private
+ */
+goog.events.markIeEvent_ = function(e) {
+  // Only the keyCode and the returnValue can be changed. We use keyCode for
+  // non keyboard events.
+  // event.returnValue is a bit more tricky. It is undefined by default. A
+  // boolean false prevents the default action. In a window.onbeforeunload and
+  // the returnValue is non undefined it will be alerted. However, we will only
+  // modify the returnValue for keyboard events. We can get a problem if non
+  // closure events sets the keyCode or the returnValue
+
+  var useReturnValue = false;
+
+  if (e.keyCode == 0) {
+    // We cannot change the keyCode in case that srcElement is input[type=file].
+    // We could test that that is the case but that would allocate 3 objects.
+    // If we use try/catch we will only allocate extra objects in the case of a
+    // failure.
+    /** @preserveTry */
+    try {
+      e.keyCode = -1;
+      return;
+    } catch (ex) {
+      useReturnValue = true;
+    }
+  }
+
+  if (useReturnValue ||
+      /** @type {boolean|undefined} */ (e.returnValue) == undefined) {
+    e.returnValue = true;
+  }
+};
+
+
+/**
+ * This is used to check if an IE event has already been handled by the Closure
+ * system so we do not do the Closure pass twice for a bubbling event.
+ * @param {Event} e  The IE browser event.
+ * @return {boolean} True if the event object has been marked.
+ * @private
+ */
+goog.events.isMarkedIeEvent_ = function(e) {
+  return e.keyCode < 0 || e.returnValue != undefined;
+};
+
+
+/**
+ * Counter to create unique event ids.
+ * @private {number}
+ */
+goog.events.uniqueIdCounter_ = 0;
+
+
+/**
+ * Creates a unique event id.
+ *
+ * @param {string} identifier The identifier.
+ * @return {string} A unique identifier.
+ * @idGenerator {unique}
+ */
+goog.events.getUniqueId = function(identifier) {
+  return identifier + '_' + goog.events.uniqueIdCounter_++;
+};
+
+
+/**
+ * @param {EventTarget} src The source object.
+ * @return {goog.events.ListenerMap} A listener map for the given
+ *     source object, or null if none exists.
+ * @private
+ */
+goog.events.getListenerMap_ = function(src) {
+  var listenerMap = src[goog.events.LISTENER_MAP_PROP_];
+  // IE serializes the property as well (e.g. when serializing outer
+  // HTML). So we must check that the value is of the correct type.
+  return listenerMap instanceof goog.events.ListenerMap ? listenerMap : null;
+};
+
+
+/**
+ * Expando property for listener function wrapper for Object with
+ * handleEvent.
+ * @private @const {string}
+ */
+goog.events.LISTENER_WRAPPER_PROP_ =
+    '__closure_events_fn_' + ((Math.random() * 1e9) >>> 0);
+
+
+/**
+ * @param {Object|Function} listener The listener function or an
+ *     object that contains handleEvent method.
+ * @return {!Function} Either the original function or a function that
+ *     calls obj.handleEvent. If the same listener is passed to this
+ *     function more than once, the same function is guaranteed to be
+ *     returned.
+ */
+goog.events.wrapListener = function(listener) {
+  goog.asserts.assert(listener, 'Listener can not be null.');
+
+  if (goog.isFunction(listener)) {
+    return listener;
+  }
+
+  goog.asserts.assert(
+      listener.handleEvent, 'An object listener must have handleEvent method.');
+  if (!listener[goog.events.LISTENER_WRAPPER_PROP_]) {
+    listener[goog.events.LISTENER_WRAPPER_PROP_] = function(e) {
+      return /** @type {?} */ (listener).handleEvent(e);
+    };
+  }
+  return listener[goog.events.LISTENER_WRAPPER_PROP_];
+};
+
+
+// Register the browser event handler as an entry point, so that
+// it can be monitored for exception handling, etc.
+goog.debug.entryPointRegistry.register(
+    /**
+     * @param {function(!Function): !Function} transformer The transforming
+     *     function.
+     */
+    function(transformer) {
+      goog.events.handleBrowserEvent_ =
+          transformer(goog.events.handleBrowserEvent_);
+    });
diff --git a/assets/viz/2/goog/events/eventtype.js b/assets/viz/2/goog/events/eventtype.js
new file mode 100644
index 0000000..161e88a
--- /dev/null
+++ b/assets/viz/2/goog/events/eventtype.js
@@ -0,0 +1,239 @@
+// Copyright 2010 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Event Types.
+ *
+ * @author arv@google.com (Erik Arvidsson)
+ */
+
+
+goog.provide('goog.events.EventType');
+
+goog.require('goog.userAgent');
+
+
+/**
+ * Returns a prefixed event name for the current browser.
+ * @param {string} eventName The name of the event.
+ * @return {string} The prefixed event name.
+ * @suppress {missingRequire|missingProvide}
+ * @private
+ */
+goog.events.getVendorPrefixedName_ = function(eventName) {
+  return goog.userAgent.WEBKIT ?
+      'webkit' + eventName :
+      (goog.userAgent.OPERA ? 'o' + eventName.toLowerCase() :
+                              eventName.toLowerCase());
+};
+
+
+/**
+ * Constants for event names.
+ * @enum {string}
+ */
+goog.events.EventType = {
+  // Mouse events
+  CLICK: 'click',
+  RIGHTCLICK: 'rightclick',
+  DBLCLICK: 'dblclick',
+  MOUSEDOWN: 'mousedown',
+  MOUSEUP: 'mouseup',
+  MOUSEOVER: 'mouseover',
+  MOUSEOUT: 'mouseout',
+  MOUSEMOVE: 'mousemove',
+  MOUSEENTER: 'mouseenter',
+  MOUSELEAVE: 'mouseleave',
+  // Select start is non-standard.
+  // See http://msdn.microsoft.com/en-us/library/ie/ms536969(v=vs.85).aspx.
+  SELECTSTART: 'selectstart',  // IE, Safari, Chrome
+
+  // Wheel events
+  // http://www.w3.org/TR/DOM-Level-3-Events/#events-wheelevents
+  WHEEL: 'wheel',
+
+  // Key events
+  KEYPRESS: 'keypress',
+  KEYDOWN: 'keydown',
+  KEYUP: 'keyup',
+
+  // Focus
+  BLUR: 'blur',
+  FOCUS: 'focus',
+  DEACTIVATE: 'deactivate',  // IE only
+  // NOTE: The following two events are not stable in cross-browser usage.
+  //     WebKit and Opera implement DOMFocusIn/Out.
+  //     IE implements focusin/out.
+  //     Gecko implements neither see bug at
+  //     https://bugzilla.mozilla.org/show_bug.cgi?id=396927.
+  // The DOM Events Level 3 Draft deprecates DOMFocusIn in favor of focusin:
+  //     http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html
+  // You can use FOCUS in Capture phase until implementations converge.
+  FOCUSIN: goog.userAgent.IE ? 'focusin' : 'DOMFocusIn',
+  FOCUSOUT: goog.userAgent.IE ? 'focusout' : 'DOMFocusOut',
+
+  // Forms
+  CHANGE: 'change',
+  RESET: 'reset',
+  SELECT: 'select',
+  SUBMIT: 'submit',
+  INPUT: 'input',
+  PROPERTYCHANGE: 'propertychange',  // IE only
+
+  // Drag and drop
+  DRAGSTART: 'dragstart',
+  DRAG: 'drag',
+  DRAGENTER: 'dragenter',
+  DRAGOVER: 'dragover',
+  DRAGLEAVE: 'dragleave',
+  DROP: 'drop',
+  DRAGEND: 'dragend',
+
+  // Touch events
+  // Note that other touch events exist, but we should follow the W3C list here.
+  // http://www.w3.org/TR/touch-events/#list-of-touchevent-types
+  TOUCHSTART: 'touchstart',
+  TOUCHMOVE: 'touchmove',
+  TOUCHEND: 'touchend',
+  TOUCHCANCEL: 'touchcancel',
+
+  // Misc
+  BEFOREUNLOAD: 'beforeunload',
+  CONSOLEMESSAGE: 'consolemessage',
+  CONTEXTMENU: 'contextmenu',
+  DOMCONTENTLOADED: 'DOMContentLoaded',
+  ERROR: 'error',
+  HELP: 'help',
+  LOAD: 'load',
+  LOSECAPTURE: 'losecapture',
+  ORIENTATIONCHANGE: 'orientationchange',
+  READYSTATECHANGE: 'readystatechange',
+  RESIZE: 'resize',
+  SCROLL: 'scroll',
+  TIMEUPDATE: 'timeupdate',
+  UNLOAD: 'unload',
+
+  // HTML 5 History events
+  // See http://www.w3.org/TR/html5/browsers.html#event-definitions-0
+  HASHCHANGE: 'hashchange',
+  PAGEHIDE: 'pagehide',
+  PAGESHOW: 'pageshow',
+  POPSTATE: 'popstate',
+
+  // Copy and Paste
+  // Support is limited. Make sure it works on your favorite browser
+  // before using.
+  // http://www.quirksmode.org/dom/events/cutcopypaste.html
+  COPY: 'copy',
+  PASTE: 'paste',
+  CUT: 'cut',
+  BEFORECOPY: 'beforecopy',
+  BEFORECUT: 'beforecut',
+  BEFOREPASTE: 'beforepaste',
+
+  // HTML5 online/offline events.
+  // http://www.w3.org/TR/offline-webapps/#related
+  ONLINE: 'online',
+  OFFLINE: 'offline',
+
+  // HTML 5 worker events
+  MESSAGE: 'message',
+  CONNECT: 'connect',
+
+  // CSS animation events.
+  /** @suppress {missingRequire} */
+  ANIMATIONSTART: goog.events.getVendorPrefixedName_('AnimationStart'),
+  /** @suppress {missingRequire} */
+  ANIMATIONEND: goog.events.getVendorPrefixedName_('AnimationEnd'),
+  /** @suppress {missingRequire} */
+  ANIMATIONITERATION: goog.events.getVendorPrefixedName_('AnimationIteration'),
+
+  // CSS transition events. Based on the browser support described at:
+  // https://developer.mozilla.org/en/css/css_transitions#Browser_compatibility
+  /** @suppress {missingRequire} */
+  TRANSITIONEND: goog.events.getVendorPrefixedName_('TransitionEnd'),
+
+  // W3C Pointer Events
+  // http://www.w3.org/TR/pointerevents/
+  POINTERDOWN: 'pointerdown',
+  POINTERUP: 'pointerup',
+  POINTERCANCEL: 'pointercancel',
+  POINTERMOVE: 'pointermove',
+  POINTEROVER: 'pointerover',
+  POINTEROUT: 'pointerout',
+  POINTERENTER: 'pointerenter',
+  POINTERLEAVE: 'pointerleave',
+  GOTPOINTERCAPTURE: 'gotpointercapture',
+  LOSTPOINTERCAPTURE: 'lostpointercapture',
+
+  // IE specific events.
+  // See http://msdn.microsoft.com/en-us/library/ie/hh772103(v=vs.85).aspx
+  // Note: these events will be supplanted in IE11.
+  MSGESTURECHANGE: 'MSGestureChange',
+  MSGESTUREEND: 'MSGestureEnd',
+  MSGESTUREHOLD: 'MSGestureHold',
+  MSGESTURESTART: 'MSGestureStart',
+  MSGESTURETAP: 'MSGestureTap',
+  MSGOTPOINTERCAPTURE: 'MSGotPointerCapture',
+  MSINERTIASTART: 'MSInertiaStart',
+  MSLOSTPOINTERCAPTURE: 'MSLostPointerCapture',
+  MSPOINTERCANCEL: 'MSPointerCancel',
+  MSPOINTERDOWN: 'MSPointerDown',
+  MSPOINTERENTER: 'MSPointerEnter',
+  MSPOINTERHOVER: 'MSPointerHover',
+  MSPOINTERLEAVE: 'MSPointerLeave',
+  MSPOINTERMOVE: 'MSPointerMove',
+  MSPOINTEROUT: 'MSPointerOut',
+  MSPOINTEROVER: 'MSPointerOver',
+  MSPOINTERUP: 'MSPointerUp',
+
+  // Native IMEs/input tools events.
+  TEXT: 'text',
+  TEXTINPUT: 'textInput',
+  COMPOSITIONSTART: 'compositionstart',
+  COMPOSITIONUPDATE: 'compositionupdate',
+  COMPOSITIONEND: 'compositionend',
+
+  // Webview tag events
+  // See http://developer.chrome.com/dev/apps/webview_tag.html
+  EXIT: 'exit',
+  LOADABORT: 'loadabort',
+  LOADCOMMIT: 'loadcommit',
+  LOADREDIRECT: 'loadredirect',
+  LOADSTART: 'loadstart',
+  LOADSTOP: 'loadstop',
+  RESPONSIVE: 'responsive',
+  SIZECHANGED: 'sizechanged',
+  UNRESPONSIVE: 'unresponsive',
+
+  // HTML5 Page Visibility API.  See details at
+  // {@code goog.labs.dom.PageVisibilityMonitor}.
+  VISIBILITYCHANGE: 'visibilitychange',
+
+  // LocalStorage event.
+  STORAGE: 'storage',
+
+  // DOM Level 2 mutation events (deprecated).
+  DOMSUBTREEMODIFIED: 'DOMSubtreeModified',
+  DOMNODEINSERTED: 'DOMNodeInserted',
+  DOMNODEREMOVED: 'DOMNodeRemoved',
+  DOMNODEREMOVEDFROMDOCUMENT: 'DOMNodeRemovedFromDocument',
+  DOMNODEINSERTEDINTODOCUMENT: 'DOMNodeInsertedIntoDocument',
+  DOMATTRMODIFIED: 'DOMAttrModified',
+  DOMCHARACTERDATAMODIFIED: 'DOMCharacterDataModified',
+
+  // Print events.
+  BEFOREPRINT: 'beforeprint',
+  AFTERPRINT: 'afterprint'
+};
diff --git a/assets/viz/2/goog/events/listenable.js b/assets/viz/2/goog/events/listenable.js
new file mode 100644
index 0000000..648d9fc
--- /dev/null
+++ b/assets/viz/2/goog/events/listenable.js
@@ -0,0 +1,338 @@
+// Copyright 2012 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview An interface for a listenable JavaScript object.
+ * @author chrishenry@google.com (Chris Henry)
+ */
+
+goog.provide('goog.events.Listenable');
+goog.provide('goog.events.ListenableKey');
+
+/** @suppress {extraRequire} */
+goog.require('goog.events.EventId');
+
+goog.forwardDeclare('goog.events.EventLike');
+goog.forwardDeclare('goog.events.EventTarget');
+
+
+
+/**
+ * A listenable interface. A listenable is an object with the ability
+ * to dispatch/broadcast events to "event listeners" registered via
+ * listen/listenOnce.
+ *
+ * The interface allows for an event propagation mechanism similar
+ * to one offered by native browser event targets, such as
+ * capture/bubble mechanism, stopping propagation, and preventing
+ * default actions. Capture/bubble mechanism depends on the ancestor
+ * tree constructed via {@code #getParentEventTarget}; this tree
+ * must be directed acyclic graph. The meaning of default action(s)
+ * in preventDefault is specific to a particular use case.
+ *
+ * Implementations that do not support capture/bubble or can not have
+ * a parent listenable can simply not implement any ability to set the
+ * parent listenable (and have {@code #getParentEventTarget} return
+ * null).
+ *
+ * Implementation of this class can be used with or independently from
+ * goog.events.
+ *
+ * Implementation must call {@code #addImplementation(implClass)}.
+ *
+ * @interface
+ * @see goog.events
+ * @see http://www.w3.org/TR/DOM-Level-2-Events/events.html
+ */
+goog.events.Listenable = function() {};
+
+
+/**
+ * An expando property to indicate that an object implements
+ * goog.events.Listenable.
+ *
+ * See addImplementation/isImplementedBy.
+ *
+ * @type {string}
+ * @const
+ */
+goog.events.Listenable.IMPLEMENTED_BY_PROP =
+    'closure_listenable_' + ((Math.random() * 1e6) | 0);
+
+
+/**
+ * Marks a given class (constructor) as an implementation of
+ * Listenable, do that we can query that fact at runtime. The class
+ * must have already implemented the interface.
+ * @param {!Function} cls The class constructor. The corresponding
+ *     class must have already implemented the interface.
+ */
+goog.events.Listenable.addImplementation = function(cls) {
+  cls.prototype[goog.events.Listenable.IMPLEMENTED_BY_PROP] = true;
+};
+
+
+/**
+ * @param {Object} obj The object to check.
+ * @return {boolean} Whether a given instance implements Listenable. The
+ *     class/superclass of the instance must call addImplementation.
+ */
+goog.events.Listenable.isImplementedBy = function(obj) {
+  return !!(obj && obj[goog.events.Listenable.IMPLEMENTED_BY_PROP]);
+};
+
+
+/**
+ * Adds an event listener. A listener can only be added once to an
+ * object and if it is added again the key for the listener is
+ * returned. Note that if the existing listener is a one-off listener
+ * (registered via listenOnce), it will no longer be a one-off
+ * listener after a call to listen().
+ *
+ * @param {string|!goog.events.EventId<EVENTOBJ>} type The event type id.
+ * @param {function(this:SCOPE, EVENTOBJ):(boolean|undefined)} listener Callback
+ *     method.
+ * @param {boolean=} opt_useCapture Whether to fire in capture phase
+ *     (defaults to false).
+ * @param {SCOPE=} opt_listenerScope Object in whose scope to call the
+ *     listener.
+ * @return {!goog.events.ListenableKey} Unique key for the listener.
+ * @template SCOPE,EVENTOBJ
+ */
+goog.events.Listenable.prototype.listen;
+
+
+/**
+ * Adds an event listener that is removed automatically after the
+ * listener fired once.
+ *
+ * If an existing listener already exists, listenOnce will do
+ * nothing. In particular, if the listener was previously registered
+ * via listen(), listenOnce() will not turn the listener into a
+ * one-off listener. Similarly, if there is already an existing
+ * one-off listener, listenOnce does not modify the listeners (it is
+ * still a once listener).
+ *
+ * @param {string|!goog.events.EventId<EVENTOBJ>} type The event type id.
+ * @param {function(this:SCOPE, EVENTOBJ):(boolean|undefined)} listener Callback
+ *     method.
+ * @param {boolean=} opt_useCapture Whether to fire in capture phase
+ *     (defaults to false).
+ * @param {SCOPE=} opt_listenerScope Object in whose scope to call the
+ *     listener.
+ * @return {!goog.events.ListenableKey} Unique key for the listener.
+ * @template SCOPE,EVENTOBJ
+ */
+goog.events.Listenable.prototype.listenOnce;
+
+
+/**
+ * Removes an event listener which was added with listen() or listenOnce().
+ *
+ * @param {string|!goog.events.EventId<EVENTOBJ>} type The event type id.
+ * @param {function(this:SCOPE, EVENTOBJ):(boolean|undefined)} listener Callback
+ *     method.
+ * @param {boolean=} opt_useCapture Whether to fire in capture phase
+ *     (defaults to false).
+ * @param {SCOPE=} opt_listenerScope Object in whose scope to call
+ *     the listener.
+ * @return {boolean} Whether any listener was removed.
+ * @template SCOPE,EVENTOBJ
+ */
+goog.events.Listenable.prototype.unlisten;
+
+
+/**
+ * Removes an event listener which was added with listen() by the key
+ * returned by listen().
+ *
+ * @param {!goog.events.ListenableKey} key The key returned by
+ *     listen() or listenOnce().
+ * @return {boolean} Whether any listener was removed.
+ */
+goog.events.Listenable.prototype.unlistenByKey;
+
+
+/**
+ * Dispatches an event (or event like object) and calls all listeners
+ * listening for events of this type. The type of the event is decided by the
+ * type property on the event object.
+ *
+ * If any of the listeners returns false OR calls preventDefault then this
+ * function will return false.  If one of the capture listeners calls
+ * stopPropagation, then the bubble listeners won't fire.
+ *
+ * @param {goog.events.EventLike} e Event object.
+ * @return {boolean} If anyone called preventDefault on the event object (or
+ *     if any of the listeners returns false) this will also return false.
+ */
+goog.events.Listenable.prototype.dispatchEvent;
+
+
+/**
+ * Removes all listeners from this listenable. If type is specified,
+ * it will only remove listeners of the particular type. otherwise all
+ * registered listeners will be removed.
+ *
+ * @param {string=} opt_type Type of event to remove, default is to
+ *     remove all types.
+ * @return {number} Number of listeners removed.
+ */
+goog.events.Listenable.prototype.removeAllListeners;
+
+
+/**
+ * Returns the parent of this event target to use for capture/bubble
+ * mechanism.
+ *
+ * NOTE(chrishenry): The name reflects the original implementation of
+ * custom event target ({@code goog.events.EventTarget}). We decided
+ * that changing the name is not worth it.
+ *
+ * @return {goog.events.Listenable} The parent EventTarget or null if
+ *     there is no parent.
+ */
+goog.events.Listenable.prototype.getParentEventTarget;
+
+
+/**
+ * Fires all registered listeners in this listenable for the given
+ * type and capture mode, passing them the given eventObject. This
+ * does not perform actual capture/bubble. Only implementors of the
+ * interface should be using this.
+ *
+ * @param {string|!goog.events.EventId<EVENTOBJ>} type The type of the
+ *     listeners to fire.
+ * @param {boolean} capture The capture mode of the listeners to fire.
+ * @param {EVENTOBJ} eventObject The event object to fire.
+ * @return {boolean} Whether all listeners succeeded without
+ *     attempting to prevent default behavior. If any listener returns
+ *     false or called goog.events.Event#preventDefault, this returns
+ *     false.
+ * @template EVENTOBJ
+ */
+goog.events.Listenable.prototype.fireListeners;
+
+
+/**
+ * Gets all listeners in this listenable for the given type and
+ * capture mode.
+ *
+ * @param {string|!goog.events.EventId} type The type of the listeners to fire.
+ * @param {boolean} capture The capture mode of the listeners to fire.
+ * @return {!Array<!goog.events.ListenableKey>} An array of registered
+ *     listeners.
+ * @template EVENTOBJ
+ */
+goog.events.Listenable.prototype.getListeners;
+
+
+/**
+ * Gets the goog.events.ListenableKey for the event or null if no such
+ * listener is in use.
+ *
+ * @param {string|!goog.events.EventId<EVENTOBJ>} type The name of the event
+ *     without the 'on' prefix.
+ * @param {function(this:SCOPE, EVENTOBJ):(boolean|undefined)} listener The
+ *     listener function to get.
+ * @param {boolean} capture Whether the listener is a capturing listener.
+ * @param {SCOPE=} opt_listenerScope Object in whose scope to call the
+ *     listener.
+ * @return {goog.events.ListenableKey} the found listener or null if not found.
+ * @template SCOPE,EVENTOBJ
+ */
+goog.events.Listenable.prototype.getListener;
+
+
+/**
+ * Whether there is any active listeners matching the specified
+ * signature. If either the type or capture parameters are
+ * unspecified, the function will match on the remaining criteria.
+ *
+ * @param {string|!goog.events.EventId<EVENTOBJ>=} opt_type Event type.
+ * @param {boolean=} opt_capture Whether to check for capture or bubble
+ *     listeners.
+ * @return {boolean} Whether there is any active listeners matching
+ *     the requested type and/or capture phase.
+ * @template EVENTOBJ
+ */
+goog.events.Listenable.prototype.hasListener;
+
+
+
+/**
+ * An interface that describes a single registered listener.
+ * @interface
+ */
+goog.events.ListenableKey = function() {};
+
+
+/**
+ * Counter used to create a unique key
+ * @type {number}
+ * @private
+ */
+goog.events.ListenableKey.counter_ = 0;
+
+
+/**
+ * Reserves a key to be used for ListenableKey#key field.
+ * @return {number} A number to be used to fill ListenableKey#key
+ *     field.
+ */
+goog.events.ListenableKey.reserveKey = function() {
+  return ++goog.events.ListenableKey.counter_;
+};
+
+
+/**
+ * The source event target.
+ * @type {Object|goog.events.Listenable|goog.events.EventTarget}
+ */
+goog.events.ListenableKey.prototype.src;
+
+
+/**
+ * The event type the listener is listening to.
+ * @type {string}
+ */
+goog.events.ListenableKey.prototype.type;
+
+
+/**
+ * The listener function.
+ * @type {function(?):?|{handleEvent:function(?):?}|null}
+ */
+goog.events.ListenableKey.prototype.listener;
+
+
+/**
+ * Whether the listener works on capture phase.
+ * @type {boolean}
+ */
+goog.events.ListenableKey.prototype.capture;
+
+
+/**
+ * The 'this' object for the listener function's scope.
+ * @type {Object|undefined}
+ */
+goog.events.ListenableKey.prototype.handler;
+
+
+/**
+ * A globally unique number to identify the key.
+ * @type {number}
+ */
+goog.events.ListenableKey.prototype.key;
diff --git a/assets/viz/2/goog/events/listener.js b/assets/viz/2/goog/events/listener.js
new file mode 100644
index 0000000..60c7370
--- /dev/null
+++ b/assets/viz/2/goog/events/listener.js
@@ -0,0 +1,131 @@
+// Copyright 2005 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Listener object.
+ * @see ../demos/events.html
+ */
+
+goog.provide('goog.events.Listener');
+
+goog.require('goog.events.ListenableKey');
+
+
+
+/**
+ * Simple class that stores information about a listener
+ * @param {!Function} listener Callback function.
+ * @param {Function} proxy Wrapper for the listener that patches the event.
+ * @param {EventTarget|goog.events.Listenable} src Source object for
+ *     the event.
+ * @param {string} type Event type.
+ * @param {boolean} capture Whether in capture or bubble phase.
+ * @param {Object=} opt_handler Object in whose context to execute the callback.
+ * @implements {goog.events.ListenableKey}
+ * @constructor
+ */
+goog.events.Listener = function(
+    listener, proxy, src, type, capture, opt_handler) {
+  if (goog.events.Listener.ENABLE_MONITORING) {
+    this.creationStack = new Error().stack;
+  }
+
+  /**
+   * Callback function.
+   * @type {Function}
+   */
+  this.listener = listener;
+
+  /**
+   * A wrapper over the original listener. This is used solely to
+   * handle native browser events (it is used to simulate the capture
+   * phase and to patch the event object).
+   * @type {Function}
+   */
+  this.proxy = proxy;
+
+  /**
+   * Object or node that callback is listening to
+   * @type {EventTarget|goog.events.Listenable}
+   */
+  this.src = src;
+
+  /**
+   * The event type.
+   * @const {string}
+   */
+  this.type = type;
+
+  /**
+   * Whether the listener is being called in the capture or bubble phase
+   * @const {boolean}
+   */
+  this.capture = !!capture;
+
+  /**
+   * Optional object whose context to execute the listener in
+   * @type {Object|undefined}
+   */
+  this.handler = opt_handler;
+
+  /**
+   * The key of the listener.
+   * @const {number}
+   * @override
+   */
+  this.key = goog.events.ListenableKey.reserveKey();
+
+  /**
+   * Whether to remove the listener after it has been called.
+   * @type {boolean}
+   */
+  this.callOnce = false;
+
+  /**
+   * Whether the listener has been removed.
+   * @type {boolean}
+   */
+  this.removed = false;
+};
+
+
+/**
+ * @define {boolean} Whether to enable the monitoring of the
+ *     goog.events.Listener instances. Switching on the monitoring is only
+ *     recommended for debugging because it has a significant impact on
+ *     performance and memory usage. If switched off, the monitoring code
+ *     compiles down to 0 bytes.
+ */
+goog.define('goog.events.Listener.ENABLE_MONITORING', false);
+
+
+/**
+ * If monitoring the goog.events.Listener instances is enabled, stores the
+ * creation stack trace of the Disposable instance.
+ * @type {string}
+ */
+goog.events.Listener.prototype.creationStack;
+
+
+/**
+ * Marks this listener as removed. This also remove references held by
+ * this listener object (such as listener and event source).
+ */
+goog.events.Listener.prototype.markAsRemoved = function() {
+  this.removed = true;
+  this.listener = null;
+  this.proxy = null;
+  this.src = null;
+  this.handler = null;
+};
diff --git a/assets/viz/2/goog/events/listenermap.js b/assets/viz/2/goog/events/listenermap.js
new file mode 100644
index 0000000..40cb848
--- /dev/null
+++ b/assets/viz/2/goog/events/listenermap.js
@@ -0,0 +1,306 @@
+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview A map of listeners that provides utility functions to
+ * deal with listeners on an event target. Used by
+ * {@code goog.events.EventTarget}.
+ *
+ * WARNING: Do not use this class from outside goog.events package.
+ *
+ * @visibility {//closure/goog/bin/sizetests:__pkg__}
+ * @visibility {//closure/goog/events:__pkg__}
+ * @visibility {//closure/goog/labs/events:__pkg__}
+ */
+
+goog.provide('goog.events.ListenerMap');
+
+goog.require('goog.array');
+goog.require('goog.events.Listener');
+goog.require('goog.object');
+
+
+
+/**
+ * Creates a new listener map.
+ * @param {EventTarget|goog.events.Listenable} src The src object.
+ * @constructor
+ * @final
+ */
+goog.events.ListenerMap = function(src) {
+  /** @type {EventTarget|goog.events.Listenable} */
+  this.src = src;
+
+  /**
+   * Maps of event type to an array of listeners.
+   * @type {!Object<string, !Array<!goog.events.Listener>>}
+   */
+  this.listeners = {};
+
+  /**
+   * The count of types in this map that have registered listeners.
+   * @private {number}
+   */
+  this.typeCount_ = 0;
+};
+
+
+/**
+ * @return {number} The count of event types in this map that actually
+ *     have registered listeners.
+ */
+goog.events.ListenerMap.prototype.getTypeCount = function() {
+  return this.typeCount_;
+};
+
+
+/**
+ * @return {number} Total number of registered listeners.
+ */
+goog.events.ListenerMap.prototype.getListenerCount = function() {
+  var count = 0;
+  for (var type in this.listeners) {
+    count += this.listeners[type].length;
+  }
+  return count;
+};
+
+
+/**
+ * Adds an event listener. A listener can only be added once to an
+ * object and if it is added again the key for the listener is
+ * returned.
+ *
+ * Note that a one-off listener will not change an existing listener,
+ * if any. On the other hand a normal listener will change existing
+ * one-off listener to become a normal listener.
+ *
+ * @param {string|!goog.events.EventId} type The listener event type.
+ * @param {!Function} listener This listener callback method.
+ * @param {boolean} callOnce Whether the listener is a one-off
+ *     listener.
+ * @param {boolean=} opt_useCapture The capture mode of the listener.
+ * @param {Object=} opt_listenerScope Object in whose scope to call the
+ *     listener.
+ * @return {!goog.events.ListenableKey} Unique key for the listener.
+ */
+goog.events.ListenerMap.prototype.add = function(
+    type, listener, callOnce, opt_useCapture, opt_listenerScope) {
+  var typeStr = type.toString();
+  var listenerArray = this.listeners[typeStr];
+  if (!listenerArray) {
+    listenerArray = this.listeners[typeStr] = [];
+    this.typeCount_++;
+  }
+
+  var listenerObj;
+  var index = goog.events.ListenerMap.findListenerIndex_(
+      listenerArray, listener, opt_useCapture, opt_listenerScope);
+  if (index > -1) {
+    listenerObj = listenerArray[index];
+    if (!callOnce) {
+      // Ensure that, if there is an existing callOnce listener, it is no
+      // longer a callOnce listener.
+      listenerObj.callOnce = false;
+    }
+  } else {
+    listenerObj = new goog.events.Listener(
+        listener, null, this.src, typeStr, !!opt_useCapture, opt_listenerScope);
+    listenerObj.callOnce = callOnce;
+    listenerArray.push(listenerObj);
+  }
+  return listenerObj;
+};
+
+
+/**
+ * Removes a matching listener.
+ * @param {string|!goog.events.EventId} type The listener event type.
+ * @param {!Function} listener This listener callback method.
+ * @param {boolean=} opt_useCapture The capture mode of the listener.
+ * @param {Object=} opt_listenerScope Object in whose scope to call the
+ *     listener.
+ * @return {boolean} Whether any listener was removed.
+ */
+goog.events.ListenerMap.prototype.remove = function(
+    type, listener, opt_useCapture, opt_listenerScope) {
+  var typeStr = type.toString();
+  if (!(typeStr in this.listeners)) {
+    return false;
+  }
+
+  var listenerArray = this.listeners[typeStr];
+  var index = goog.events.ListenerMap.findListenerIndex_(
+      listenerArray, listener, opt_useCapture, opt_listenerScope);
+  if (index > -1) {
+    var listenerObj = listenerArray[index];
+    listenerObj.markAsRemoved();
+    goog.array.removeAt(listenerArray, index);
+    if (listenerArray.length == 0) {
+      delete this.listeners[typeStr];
+      this.typeCount_--;
+    }
+    return true;
+  }
+  return false;
+};
+
+
+/**
+ * Removes the given listener object.
+ * @param {!goog.events.ListenableKey} listener The listener to remove.
+ * @return {boolean} Whether the listener is removed.
+ */
+goog.events.ListenerMap.prototype.removeByKey = function(listener) {
+  var type = listener.type;
+  if (!(type in this.listeners)) {
+    return false;
+  }
+
+  var removed = goog.array.remove(this.listeners[type], listener);
+  if (removed) {
+    listener.markAsRemoved();
+    if (this.listeners[type].length == 0) {
+      delete this.listeners[type];
+      this.typeCount_--;
+    }
+  }
+  return removed;
+};
+
+
+/**
+ * Removes all listeners from this map. If opt_type is provided, only
+ * listeners that match the given type are removed.
+ * @param {string|!goog.events.EventId=} opt_type Type of event to remove.
+ * @return {number} Number of listeners removed.
+ */
+goog.events.ListenerMap.prototype.removeAll = function(opt_type) {
+  var typeStr = opt_type && opt_type.toString();
+  var count = 0;
+  for (var type in this.listeners) {
+    if (!typeStr || type == typeStr) {
+      var listenerArray = this.listeners[type];
+      for (var i = 0; i < listenerArray.length; i++) {
+        ++count;
+        listenerArray[i].markAsRemoved();
+      }
+      delete this.listeners[type];
+      this.typeCount_--;
+    }
+  }
+  return count;
+};
+
+
+/**
+ * Gets all listeners that match the given type and capture mode. The
+ * returned array is a copy (but the listener objects are not).
+ * @param {string|!goog.events.EventId} type The type of the listeners
+ *     to retrieve.
+ * @param {boolean} capture The capture mode of the listeners to retrieve.
+ * @return {!Array<!goog.events.ListenableKey>} An array of matching
+ *     listeners.
+ */
+goog.events.ListenerMap.prototype.getListeners = function(type, capture) {
+  var listenerArray = this.listeners[type.toString()];
+  var rv = [];
+  if (listenerArray) {
+    for (var i = 0; i < listenerArray.length; ++i) {
+      var listenerObj = listenerArray[i];
+      if (listenerObj.capture == capture) {
+        rv.push(listenerObj);
+      }
+    }
+  }
+  return rv;
+};
+
+
+/**
+ * Gets the goog.events.ListenableKey for the event or null if no such
+ * listener is in use.
+ *
+ * @param {string|!goog.events.EventId} type The type of the listener
+ *     to retrieve.
+ * @param {!Function} listener The listener function to get.
+ * @param {boolean} capture Whether the listener is a capturing listener.
+ * @param {Object=} opt_listenerScope Object in whose scope to call the
+ *     listener.
+ * @return {goog.events.ListenableKey} the found listener or null if not found.
+ */
+goog.events.ListenerMap.prototype.getListener = function(
+    type, listener, capture, opt_listenerScope) {
+  var listenerArray = this.listeners[type.toString()];
+  var i = -1;
+  if (listenerArray) {
+    i = goog.events.ListenerMap.findListenerIndex_(
+        listenerArray, listener, capture, opt_listenerScope);
+  }
+  return i > -1 ? listenerArray[i] : null;
+};
+
+
+/**
+ * Whether there is a matching listener. If either the type or capture
+ * parameters are unspecified, the function will match on the
+ * remaining criteria.
+ *
+ * @param {string|!goog.events.EventId=} opt_type The type of the listener.
+ * @param {boolean=} opt_capture The capture mode of the listener.
+ * @return {boolean} Whether there is an active listener matching
+ *     the requested type and/or capture phase.
+ */
+goog.events.ListenerMap.prototype.hasListener = function(
+    opt_type, opt_capture) {
+  var hasType = goog.isDef(opt_type);
+  var typeStr = hasType ? opt_type.toString() : '';
+  var hasCapture = goog.isDef(opt_capture);
+
+  return goog.object.some(this.listeners, function(listenerArray, type) {
+    for (var i = 0; i < listenerArray.length; ++i) {
+      if ((!hasType || listenerArray[i].type == typeStr) &&
+          (!hasCapture || listenerArray[i].capture == opt_capture)) {
+        return true;
+      }
+    }
+
+    return false;
+  });
+};
+
+
+/**
+ * Finds the index of a matching goog.events.Listener in the given
+ * listenerArray.
+ * @param {!Array<!goog.events.Listener>} listenerArray Array of listener.
+ * @param {!Function} listener The listener function.
+ * @param {boolean=} opt_useCapture The capture flag for the listener.
+ * @param {Object=} opt_listenerScope The listener scope.
+ * @return {number} The index of the matching listener within the
+ *     listenerArray.
+ * @private
+ */
+goog.events.ListenerMap.findListenerIndex_ = function(
+    listenerArray, listener, opt_useCapture, opt_listenerScope) {
+  for (var i = 0; i < listenerArray.length; ++i) {
+    var listenerObj = listenerArray[i];
+    if (!listenerObj.removed && listenerObj.listener == listener &&
+        listenerObj.capture == !!opt_useCapture &&
+        listenerObj.handler == opt_listenerScope) {
+      return i;
+    }
+  }
+  return -1;
+};