Current File : //var/www/tusveterinarios/wp-content/plugins/elementor/assets/lib/backbone/backbone.marionette.js
/*! elementor - v3.0.15 - 2020-12-20 */
// MarionetteJS (Backbone.Marionette)
// ----------------------------------
// v2.4.5.e1
// Change Log:
// 	e1: Fix - Compatibility with jQuery 3. (`Marionette.Region.reset`).
//
// Copyright (c)2016 Derick Bailey, Muted Solutions, LLC.
// Distributed under MIT license
//
// http://marionettejs.com


/*!
 * Includes BabySitter
 * https://github.com/marionettejs/backbone.babysitter/
 *
 * Includes Wreqr
 * https://github.com/marionettejs/backbone.wreqr/
 */


(function(root, factory) {

  /* istanbul ignore next */
  if (typeof define === 'function' && define.amd) {
    define(['backbone', 'underscore'], function(Backbone, _) {
      return (root.Marionette = root.Mn = factory(root, Backbone, _));
    });
  } else if (typeof exports !== 'undefined') {
    var Backbone = require('backbone');
    var _ = require('underscore');
    module.exports = factory(root, Backbone, _);
  } else {
    root.Marionette = root.Mn = factory(root, root.Backbone, root._);
  }

}(this, function(root, Backbone, _) {
  'use strict';

  /* istanbul ignore next */
  // Backbone.BabySitter
  // -------------------
  // v0.1.11
  //
  // Copyright (c)2016 Derick Bailey, Muted Solutions, LLC.
  // Distributed under MIT license
  //
  // http://github.com/marionettejs/backbone.babysitter
  (function(Backbone, _) {
    "use strict";
    var previousChildViewContainer = Backbone.ChildViewContainer;
    // BabySitter.ChildViewContainer
    // -----------------------------
    //
    // Provide a container to store, retrieve and
    // shut down child views.
    Backbone.ChildViewContainer = function(Backbone, _) {
      // Container Constructor
      // ---------------------
      var Container = function(views) {
        this._views = {};
        this._indexByModel = {};
        this._indexByCustom = {};
        this._updateLength();
        _.each(views, this.add, this);
      };
      // Container Methods
      // -----------------
      _.extend(Container.prototype, {
        // Add a view to this container. Stores the view
        // by `cid` and makes it searchable by the model
        // cid (and model itself). Optionally specify
        // a custom key to store an retrieve the view.
        add: function(view, customIndex) {
          var viewCid = view.cid;
          // store the view
          this._views[viewCid] = view;
          // index it by model
          if (view.model) {
            this._indexByModel[view.model.cid] = viewCid;
          }
          // index by custom
          if (customIndex) {
            this._indexByCustom[customIndex] = viewCid;
          }
          this._updateLength();
          return this;
        },
        // Find a view by the model that was attached to
        // it. Uses the model's `cid` to find it.
        findByModel: function(model) {
          return this.findByModelCid(model.cid);
        },
        // Find a view by the `cid` of the model that was attached to
        // it. Uses the model's `cid` to find the view `cid` and
        // retrieve the view using it.
        findByModelCid: function(modelCid) {
          var viewCid = this._indexByModel[modelCid];
          return this.findByCid(viewCid);
        },
        // Find a view by a custom indexer.
        findByCustom: function(index) {
          var viewCid = this._indexByCustom[index];
          return this.findByCid(viewCid);
        },
        // Find by index. This is not guaranteed to be a
        // stable index.
        findByIndex: function(index) {
          return _.values(this._views)[index];
        },
        // retrieve a view by its `cid` directly
        findByCid: function(cid) {
          return this._views[cid];
        },
        // Remove a view
        remove: function(view) {
          var viewCid = view.cid;
          // delete model index
          if (view.model) {
            delete this._indexByModel[view.model.cid];
          }
          // delete custom index
          _.any(this._indexByCustom, function(cid, key) {
            if (cid === viewCid) {
              delete this._indexByCustom[key];
              return true;
            }
          }, this);
          // remove the view from the container
          delete this._views[viewCid];
          // update the length
          this._updateLength();
          return this;
        },
        // Call a method on every view in the container,
        // passing parameters to the call method one at a
        // time, like `function.call`.
        call: function(method) {
          this.apply(method, _.tail(arguments));
        },
        // Apply a method on every view in the container,
        // passing parameters to the call method one at a
        // time, like `function.apply`.
        apply: function(method, args) {
          _.each(this._views, function(view) {
            if (_.isFunction(view[method])) {
              view[method].apply(view, args || []);
            }
          });
        },
        // Update the `.length` attribute on this container
        _updateLength: function() {
          this.length = _.size(this._views);
        }
      });
      // Borrowing this code from Backbone.Collection:
      // http://backbonejs.org/docs/backbone.html#section-106
      //
      // Mix in methods from Underscore, for iteration, and other
      // collection related features.
      var methods = [ "forEach", "each", "map", "find", "detect", "filter", "select", "reject", "every", "all", "some", "any", "include", "contains", "invoke", "toArray", "first", "initial", "rest", "last", "without", "isEmpty", "pluck", "reduce" ];
      _.each(methods, function(method) {
        Container.prototype[method] = function() {
          var views = _.values(this._views);
          var args = [ views ].concat(_.toArray(arguments));
          return _[method].apply(_, args);
        };
      });
      // return the public API
      return Container;
    }(Backbone, _);
    Backbone.ChildViewContainer.VERSION = "0.1.11";
    Backbone.ChildViewContainer.noConflict = function() {
      Backbone.ChildViewContainer = previousChildViewContainer;
      return this;
    };
    return Backbone.ChildViewContainer;
  })(Backbone, _);

  /* istanbul ignore next */
  // Backbone.Wreqr (Backbone.Marionette)
  // ----------------------------------
  // v1.3.6
  //
  // Copyright (c)2016 Derick Bailey, Muted Solutions, LLC.
  // Distributed under MIT license
  //
  // http://github.com/marionettejs/backbone.wreqr
  (function(Backbone, _) {
    "use strict";
    var previousWreqr = Backbone.Wreqr;
    var Wreqr = Backbone.Wreqr = {};
    Backbone.Wreqr.VERSION = "1.3.6";
    Backbone.Wreqr.noConflict = function() {
      Backbone.Wreqr = previousWreqr;
      return this;
    };
    // Handlers
    // --------
    // A registry of functions to call, given a name
    Wreqr.Handlers = function(Backbone, _) {
      "use strict";
      // Constructor
      // -----------
      var Handlers = function(options) {
        this.options = options;
        this._wreqrHandlers = {};
        if (_.isFunction(this.initialize)) {
          this.initialize(options);
        }
      };
      Handlers.extend = Backbone.Model.extend;
      // Instance Members
      // ----------------
      _.extend(Handlers.prototype, Backbone.Events, {
        // Add multiple handlers using an object literal configuration
        setHandlers: function(handlers) {
          _.each(handlers, function(handler, name) {
            var context = null;
            if (_.isObject(handler) && !_.isFunction(handler)) {
              context = handler.context;
              handler = handler.callback;
            }
            this.setHandler(name, handler, context);
          }, this);
        },
        // Add a handler for the given name, with an
        // optional context to run the handler within
        setHandler: function(name, handler, context) {
          var config = {
            callback: handler,
            context: context
          };
          this._wreqrHandlers[name] = config;
          this.trigger("handler:add", name, handler, context);
        },
        // Determine whether or not a handler is registered
        hasHandler: function(name) {
          return !!this._wreqrHandlers[name];
        },
        // Get the currently registered handler for
        // the specified name. Throws an exception if
        // no handler is found.
        getHandler: function(name) {
          var config = this._wreqrHandlers[name];
          if (!config) {
            return;
          }
          return function() {
            return config.callback.apply(config.context, arguments);
          };
        },
        // Remove a handler for the specified name
        removeHandler: function(name) {
          delete this._wreqrHandlers[name];
        },
        // Remove all handlers from this registry
        removeAllHandlers: function() {
          this._wreqrHandlers = {};
        }
      });
      return Handlers;
    }(Backbone, _);
    // Wreqr.CommandStorage
    // --------------------
    //
    // Store and retrieve commands for execution.
    Wreqr.CommandStorage = function() {
      "use strict";
      // Constructor function
      var CommandStorage = function(options) {
        this.options = options;
        this._commands = {};
        if (_.isFunction(this.initialize)) {
          this.initialize(options);
        }
      };
      // Instance methods
      _.extend(CommandStorage.prototype, Backbone.Events, {
        // Get an object literal by command name, that contains
        // the `commandName` and the `instances` of all commands
        // represented as an array of arguments to process
        getCommands: function(commandName) {
          var commands = this._commands[commandName];
          // we don't have it, so add it
          if (!commands) {
            // build the configuration
            commands = {
              command: commandName,
              instances: []
            };
            // store it
            this._commands[commandName] = commands;
          }
          return commands;
        },
        // Add a command by name, to the storage and store the
        // args for the command
        addCommand: function(commandName, args) {
          var command = this.getCommands(commandName);
          command.instances.push(args);
        },
        // Clear all commands for the given `commandName`
        clearCommands: function(commandName) {
          var command = this.getCommands(commandName);
          command.instances = [];
        }
      });
      return CommandStorage;
    }();
    // Wreqr.Commands
    // --------------
    //
    // A simple command pattern implementation. Register a command
    // handler and execute it.
    Wreqr.Commands = function(Wreqr, _) {
      "use strict";
      return Wreqr.Handlers.extend({
        // default storage type
        storageType: Wreqr.CommandStorage,
        constructor: function(options) {
          this.options = options || {};
          this._initializeStorage(this.options);
          this.on("handler:add", this._executeCommands, this);
          Wreqr.Handlers.prototype.constructor.apply(this, arguments);
        },
        // Execute a named command with the supplied args
        execute: function(name) {
          name = arguments[0];
          var args = _.rest(arguments);
          if (this.hasHandler(name)) {
            this.getHandler(name).apply(this, args);
          } else {
            this.storage.addCommand(name, args);
          }
        },
        // Internal method to handle bulk execution of stored commands
        _executeCommands: function(name, handler, context) {
          var command = this.storage.getCommands(name);
          // loop through and execute all the stored command instances
          _.each(command.instances, function(args) {
            handler.apply(context, args);
          });
          this.storage.clearCommands(name);
        },
        // Internal method to initialize storage either from the type's
        // `storageType` or the instance `options.storageType`.
        _initializeStorage: function(options) {
          var storage;
          var StorageType = options.storageType || this.storageType;
          if (_.isFunction(StorageType)) {
            storage = new StorageType();
          } else {
            storage = StorageType;
          }
          this.storage = storage;
        }
      });
    }(Wreqr, _);
    // Wreqr.RequestResponse
    // ---------------------
    //
    // A simple request/response implementation. Register a
    // request handler, and return a response from it
    Wreqr.RequestResponse = function(Wreqr, _) {
      "use strict";
      return Wreqr.Handlers.extend({
        request: function(name) {
          if (this.hasHandler(name)) {
            return this.getHandler(name).apply(this, _.rest(arguments));
          }
        }
      });
    }(Wreqr, _);
    // Event Aggregator
    // ----------------
    // A pub-sub object that can be used to decouple various parts
    // of an application through event-driven architecture.
    Wreqr.EventAggregator = function(Backbone, _) {
      "use strict";
      var EA = function() {};
      // Copy the `extend` function used by Backbone's classes
      EA.extend = Backbone.Model.extend;
      // Copy the basic Backbone.Events on to the event aggregator
      _.extend(EA.prototype, Backbone.Events);
      return EA;
    }(Backbone, _);
    // Wreqr.Channel
    // --------------
    //
    // An object that wraps the three messaging systems:
    // EventAggregator, RequestResponse, Commands
    Wreqr.Channel = function(Wreqr) {
      "use strict";
      var Channel = function(channelName) {
        this.vent = new Backbone.Wreqr.EventAggregator();
        this.reqres = new Backbone.Wreqr.RequestResponse();
        this.commands = new Backbone.Wreqr.Commands();
        this.channelName = channelName;
      };
      _.extend(Channel.prototype, {
        // Remove all handlers from the messaging systems of this channel
        reset: function() {
          this.vent.off();
          this.vent.stopListening();
          this.reqres.removeAllHandlers();
          this.commands.removeAllHandlers();
          return this;
        },
        // Connect a hash of events; one for each messaging system
        connectEvents: function(hash, context) {
          this._connect("vent", hash, context);
          return this;
        },
        connectCommands: function(hash, context) {
          this._connect("commands", hash, context);
          return this;
        },
        connectRequests: function(hash, context) {
          this._connect("reqres", hash, context);
          return this;
        },
        // Attach the handlers to a given message system `type`
        _connect: function(type, hash, context) {
          if (!hash) {
            return;
          }
          context = context || this;
          var method = type === "vent" ? "on" : "setHandler";
          _.each(hash, function(fn, eventName) {
            this[type][method](eventName, _.bind(fn, context));
          }, this);
        }
      });
      return Channel;
    }(Wreqr);
    // Wreqr.Radio
    // --------------
    //
    // An object that lets you communicate with many channels.
    Wreqr.radio = function(Wreqr, _) {
      "use strict";
      var Radio = function() {
        this._channels = {};
        this.vent = {};
        this.commands = {};
        this.reqres = {};
        this._proxyMethods();
      };
      _.extend(Radio.prototype, {
        channel: function(channelName) {
          if (!channelName) {
            throw new Error("Channel must receive a name");
          }
          return this._getChannel(channelName);
        },
        _getChannel: function(channelName) {
          var channel = this._channels[channelName];
          if (!channel) {
            channel = new Wreqr.Channel(channelName);
            this._channels[channelName] = channel;
          }
          return channel;
        },
        _proxyMethods: function() {
          _.each([ "vent", "commands", "reqres" ], function(system) {
            _.each(messageSystems[system], function(method) {
              this[system][method] = proxyMethod(this, system, method);
            }, this);
          }, this);
        }
      });
      var messageSystems = {
        vent: [ "on", "off", "trigger", "once", "stopListening", "listenTo", "listenToOnce" ],
        commands: [ "execute", "setHandler", "setHandlers", "removeHandler", "removeAllHandlers" ],
        reqres: [ "request", "setHandler", "setHandlers", "removeHandler", "removeAllHandlers" ]
      };
      var proxyMethod = function(radio, system, method) {
        return function(channelName) {
          var messageSystem = radio._getChannel(channelName)[system];
          return messageSystem[method].apply(messageSystem, _.rest(arguments));
        };
      };
      return new Radio();
    }(Wreqr, _);
    return Backbone.Wreqr;
  })(Backbone, _);

  var previousMarionette = root.Marionette;
  var previousMn = root.Mn;

  var Marionette = Backbone.Marionette = {};

  Marionette.VERSION = '2.4.5';

  Marionette.noConflict = function() {
    root.Marionette = previousMarionette;
    root.Mn = previousMn;
    return this;
  };

  Backbone.Marionette = Marionette;

  // Get the Deferred creator for later use
  Marionette.Deferred = Backbone.$.Deferred;

  /* jshint unused: false *//* global console */
  
  // Helpers
  // -------
  
  // Marionette.extend
  // -----------------
  
  // Borrow the Backbone `extend` method so we can use it as needed
  Marionette.extend = Backbone.Model.extend;
  
  // Marionette.isNodeAttached
  // -------------------------
  
  // Determine if `el` is a child of the document
  Marionette.isNodeAttached = function(el) {
    return Backbone.$.contains(document.documentElement, el);
  };
  
  // Merge `keys` from `options` onto `this`
  Marionette.mergeOptions = function(options, keys) {
    if (!options) { return; }
    _.extend(this, _.pick(options, keys));
  };
  
  // Marionette.getOption
  // --------------------
  
  // Retrieve an object, function or other value from a target
  // object or its `options`, with `options` taking precedence.
  Marionette.getOption = function(target, optionName) {
    if (!target || !optionName) { return; }
    if (target.options && (target.options[optionName] !== undefined)) {
      return target.options[optionName];
    } else {
      return target[optionName];
    }
  };
  
  // Proxy `Marionette.getOption`
  Marionette.proxyGetOption = function(optionName) {
    return Marionette.getOption(this, optionName);
  };
  
  // Similar to `_.result`, this is a simple helper
  // If a function is provided we call it with context
  // otherwise just return the value. If the value is
  // undefined return a default value
  Marionette._getValue = function(value, context, params) {
    if (_.isFunction(value)) {
      value = params ? value.apply(context, params) : value.call(context);
    }
    return value;
  };
  
  // Marionette.normalizeMethods
  // ----------------------
  
  // Pass in a mapping of events => functions or function names
  // and return a mapping of events => functions
  Marionette.normalizeMethods = function(hash) {
    return _.reduce(hash, function(normalizedHash, method, name) {
      if (!_.isFunction(method)) {
        method = this[method];
      }
      if (method) {
        normalizedHash[name] = method;
      }
      return normalizedHash;
    }, {}, this);
  };
  
  // utility method for parsing @ui. syntax strings
  // into associated selector
  Marionette.normalizeUIString = function(uiString, ui) {
    return uiString.replace(/@ui\.[a-zA-Z-_$0-9]*/g, function(r) {
      return ui[r.slice(4)];
    });
  };
  
  // allows for the use of the @ui. syntax within
  // a given key for triggers and events
  // swaps the @ui with the associated selector.
  // Returns a new, non-mutated, parsed events hash.
  Marionette.normalizeUIKeys = function(hash, ui) {
    return _.reduce(hash, function(memo, val, key) {
      var normalizedKey = Marionette.normalizeUIString(key, ui);
      memo[normalizedKey] = val;
      return memo;
    }, {});
  };
  
  // allows for the use of the @ui. syntax within
  // a given value for regions
  // swaps the @ui with the associated selector
  Marionette.normalizeUIValues = function(hash, ui, properties) {
    _.each(hash, function(val, key) {
      if (_.isString(val)) {
        hash[key] = Marionette.normalizeUIString(val, ui);
      } else if (_.isObject(val) && _.isArray(properties)) {
        _.extend(val, Marionette.normalizeUIValues(_.pick(val, properties), ui));
        /* Value is an object, and we got an array of embedded property names to normalize. */
        _.each(properties, function(property) {
          var propertyVal = val[property];
          if (_.isString(propertyVal)) {
            val[property] = Marionette.normalizeUIString(propertyVal, ui);
          }
        });
      }
    });
    return hash;
  };
  
  // Mix in methods from Underscore, for iteration, and other
  // collection related features.
  // Borrowing this code from Backbone.Collection:
  // http://backbonejs.org/docs/backbone.html#section-121
  Marionette.actAsCollection = function(object, listProperty) {
    var methods = ['forEach', 'each', 'map', 'find', 'detect', 'filter',
      'select', 'reject', 'every', 'all', 'some', 'any', 'include',
      'contains', 'invoke', 'toArray', 'first', 'initial', 'rest',
      'last', 'without', 'isEmpty', 'pluck'];
  
    _.each(methods, function(method) {
      object[method] = function() {
        var list = _.values(_.result(this, listProperty));
        var args = [list].concat(_.toArray(arguments));
        return _[method].apply(_, args);
      };
    });
  };
  
  var deprecate = Marionette.deprecate = function(message, test) {
    if (_.isObject(message)) {
      message = (
        message.prev + ' is going to be removed in the future. ' +
        'Please use ' + message.next + ' instead.' +
        (message.url ? ' See: ' + message.url : '')
      );
    }
  
    if ((test === undefined || !test) && !deprecate._cache[message]) {
      deprecate._warn('Deprecation warning: ' + message);
      deprecate._cache[message] = true;
    }
  };
  
  deprecate._console = typeof console !== 'undefined' ? console : {};
  deprecate._warn = function() {
    var warn = deprecate._console.warn || deprecate._console.log || function() {};
    return warn.apply(deprecate._console, arguments);
  };
  deprecate._cache = {};
  
  /* jshint maxstatements: 14, maxcomplexity: 7 */
  
  // Trigger Method
  // --------------
  
  Marionette._triggerMethod = (function() {
    // split the event name on the ":"
    var splitter = /(^|:)(\w)/gi;
  
    // take the event section ("section1:section2:section3")
    // and turn it in to uppercase name
    function getEventName(match, prefix, eventName) {
      return eventName.toUpperCase();
    }
  
    return function(context, event, args) {
      var noEventArg = arguments.length < 3;
      if (noEventArg) {
        args = event;
        event = args[0];
      }
  
      // get the method name from the event name
      var methodName = 'on' + event.replace(splitter, getEventName);
      var method = context[methodName];
      var result;
  
      // call the onMethodName if it exists
      if (_.isFunction(method)) {
        // pass all args, except the event name
        result = method.apply(context, noEventArg ? _.rest(args) : args);
      }
  
      // trigger the event, if a trigger method exists
      if (_.isFunction(context.trigger)) {
        if (noEventArg + args.length > 1) {
          context.trigger.apply(context, noEventArg ? args : [event].concat(_.drop(args, 0)));
        } else {
          context.trigger(event);
        }
      }
  
      return result;
    };
  })();
  
  // Trigger an event and/or a corresponding method name. Examples:
  //
  // `this.triggerMethod("foo")` will trigger the "foo" event and
  // call the "onFoo" method.
  //
  // `this.triggerMethod("foo:bar")` will trigger the "foo:bar" event and
  // call the "onFooBar" method.
  Marionette.triggerMethod = function(event) {
    return Marionette._triggerMethod(this, arguments);
  };
  
  // triggerMethodOn invokes triggerMethod on a specific context
  //
  // e.g. `Marionette.triggerMethodOn(view, 'show')`
  // will trigger a "show" event or invoke onShow the view.
  Marionette.triggerMethodOn = function(context) {
    var fnc = _.isFunction(context.triggerMethod) ?
                  context.triggerMethod :
                  Marionette.triggerMethod;
  
    return fnc.apply(context, _.rest(arguments));
  };
  
  // DOM Refresh
  // -----------
  
  // Monitor a view's state, and after it has been rendered and shown
  // in the DOM, trigger a "dom:refresh" event every time it is
  // re-rendered.
  
  Marionette.MonitorDOMRefresh = function(view) {
    if (view._isDomRefreshMonitored) { return; }
    view._isDomRefreshMonitored = true;
  
    // track when the view has been shown in the DOM,
    // using a Marionette.Region (or by other means of triggering "show")
    function handleShow() {
      view._isShown = true;
      triggerDOMRefresh();
    }
  
    // track when the view has been rendered
    function handleRender() {
      view._isRendered = true;
      triggerDOMRefresh();
    }
  
    // Trigger the "dom:refresh" event and corresponding "onDomRefresh" method
    function triggerDOMRefresh() {
      if (view._isShown && view._isRendered && Marionette.isNodeAttached(view.el)) {
        Marionette.triggerMethodOn(view, 'dom:refresh', view);
      }
    }
  
    view.on({
      show: handleShow,
      render: handleRender
    });
  };
  
  /* jshint maxparams: 5 */
  
  // Bind Entity Events & Unbind Entity Events
  // -----------------------------------------
  //
  // These methods are used to bind/unbind a backbone "entity" (e.g. collection/model)
  // to methods on a target object.
  //
  // The first parameter, `target`, must have the Backbone.Events module mixed in.
  //
  // The second parameter is the `entity` (Backbone.Model, Backbone.Collection or
  // any object that has Backbone.Events mixed in) to bind the events from.
  //
  // The third parameter is a hash of { "event:name": "eventHandler" }
  // configuration. Multiple handlers can be separated by a space. A
  // function can be supplied instead of a string handler name.
  
  (function(Marionette) {
    'use strict';
  
    // Bind the event to handlers specified as a string of
    // handler names on the target object
    function bindFromStrings(target, entity, evt, methods) {
      var methodNames = methods.split(/\s+/);
  
      _.each(methodNames, function(methodName) {
  
        var method = target[methodName];
        if (!method) {
          throw new Marionette.Error('Method "' + methodName +
            '" was configured as an event handler, but does not exist.');
        }
  
        target.listenTo(entity, evt, method);
      });
    }
  
    // Bind the event to a supplied callback function
    function bindToFunction(target, entity, evt, method) {
      target.listenTo(entity, evt, method);
    }
  
    // Bind the event to handlers specified as a string of
    // handler names on the target object
    function unbindFromStrings(target, entity, evt, methods) {
      var methodNames = methods.split(/\s+/);
  
      _.each(methodNames, function(methodName) {
        var method = target[methodName];
        target.stopListening(entity, evt, method);
      });
    }
  
    // Bind the event to a supplied callback function
    function unbindToFunction(target, entity, evt, method) {
      target.stopListening(entity, evt, method);
    }
  
    // generic looping function
    function iterateEvents(target, entity, bindings, functionCallback, stringCallback) {
      if (!entity || !bindings) { return; }
  
      // type-check bindings
      if (!_.isObject(bindings)) {
        throw new Marionette.Error({
          message: 'Bindings must be an object or function.',
          url: 'marionette.functions.html#marionettebindentityevents'
        });
      }
  
      // allow the bindings to be a function
      bindings = Marionette._getValue(bindings, target);
  
      // iterate the bindings and bind them
      _.each(bindings, function(methods, evt) {
  
        // allow for a function as the handler,
        // or a list of event names as a string
        if (_.isFunction(methods)) {
          functionCallback(target, entity, evt, methods);
        } else {
          stringCallback(target, entity, evt, methods);
        }
  
      });
    }
  
    // Export Public API
    Marionette.bindEntityEvents = function(target, entity, bindings) {
      iterateEvents(target, entity, bindings, bindToFunction, bindFromStrings);
    };
  
    Marionette.unbindEntityEvents = function(target, entity, bindings) {
      iterateEvents(target, entity, bindings, unbindToFunction, unbindFromStrings);
    };
  
    // Proxy `bindEntityEvents`
    Marionette.proxyBindEntityEvents = function(entity, bindings) {
      return Marionette.bindEntityEvents(this, entity, bindings);
    };
  
    // Proxy `unbindEntityEvents`
    Marionette.proxyUnbindEntityEvents = function(entity, bindings) {
      return Marionette.unbindEntityEvents(this, entity, bindings);
    };
  })(Marionette);
  

  // Error
  // -----
  
  var errorProps = ['description', 'fileName', 'lineNumber', 'name', 'message', 'number'];
  
  Marionette.Error = Marionette.extend.call(Error, {
    urlRoot: 'http://marionettejs.com/docs/v' + Marionette.VERSION + '/',
  
    constructor: function(message, options) {
      if (_.isObject(message)) {
        options = message;
        message = options.message;
      } else if (!options) {
        options = {};
      }
  
      var error = Error.call(this, message);
      _.extend(this, _.pick(error, errorProps), _.pick(options, errorProps));
  
      this.captureStackTrace();
  
      if (options.url) {
        this.url = this.urlRoot + options.url;
      }
    },
  
    captureStackTrace: function() {
      if (Error.captureStackTrace) {
        Error.captureStackTrace(this, Marionette.Error);
      }
    },
  
    toString: function() {
      return this.name + ': ' + this.message + (this.url ? ' See: ' + this.url : '');
    }
  });
  
  Marionette.Error.extend = Marionette.extend;
  
  // Callbacks
  // ---------
  
  // A simple way of managing a collection of callbacks
  // and executing them at a later point in time, using jQuery's
  // `Deferred` object.
  Marionette.Callbacks = function() {
    this._deferred = Marionette.Deferred();
    this._callbacks = [];
  };
  
  _.extend(Marionette.Callbacks.prototype, {
  
    // Add a callback to be executed. Callbacks added here are
    // guaranteed to execute, even if they are added after the
    // `run` method is called.
    add: function(callback, contextOverride) {
      var promise = _.result(this._deferred, 'promise');
  
      this._callbacks.push({cb: callback, ctx: contextOverride});
  
      promise.then(function(args) {
        if (contextOverride) { args.context = contextOverride; }
        callback.call(args.context, args.options);
      });
    },
  
    // Run all registered callbacks with the context specified.
    // Additional callbacks can be added after this has been run
    // and they will still be executed.
    run: function(options, context) {
      this._deferred.resolve({
        options: options,
        context: context
      });
    },
  
    // Resets the list of callbacks to be run, allowing the same list
    // to be run multiple times - whenever the `run` method is called.
    reset: function() {
      var callbacks = this._callbacks;
      this._deferred = Marionette.Deferred();
      this._callbacks = [];
  
      _.each(callbacks, function(cb) {
        this.add(cb.cb, cb.ctx);
      }, this);
    }
  });
  
  // Controller
  // ----------
  
  // A multi-purpose object to use as a controller for
  // modules and routers, and as a mediator for workflow
  // and coordination of other objects, views, and more.
  Marionette.Controller = function(options) {
    this.options = options || {};
  
    if (_.isFunction(this.initialize)) {
      this.initialize(this.options);
    }
  };
  
  Marionette.Controller.extend = Marionette.extend;
  
  // Controller Methods
  // --------------
  
  // Ensure it can trigger events with Backbone.Events
  _.extend(Marionette.Controller.prototype, Backbone.Events, {
    destroy: function() {
      Marionette._triggerMethod(this, 'before:destroy', arguments);
      Marionette._triggerMethod(this, 'destroy', arguments);
  
      this.stopListening();
      this.off();
      return this;
    },
  
    // import the `triggerMethod` to trigger events with corresponding
    // methods if the method exists
    triggerMethod: Marionette.triggerMethod,
  
    // A handy way to merge options onto the instance
    mergeOptions: Marionette.mergeOptions,
  
    // Proxy `getOption` to enable getting options from this or this.options by name.
    getOption: Marionette.proxyGetOption
  
  });
  
  // Object
  // ------
  
  // A Base Class that other Classes should descend from.
  // Object borrows many conventions and utilities from Backbone.
  Marionette.Object = function(options) {
    this.options = _.extend({}, _.result(this, 'options'), options);
  
    this.initialize.apply(this, arguments);
  };
  
  Marionette.Object.extend = Marionette.extend;
  
  // Object Methods
  // --------------
  
  // Ensure it can trigger events with Backbone.Events
  _.extend(Marionette.Object.prototype, Backbone.Events, {
  
    //this is a noop method intended to be overridden by classes that extend from this base
    initialize: function() {},
  
    destroy: function(options) {
      options = options || {};
  
      this.triggerMethod('before:destroy', options);
      this.triggerMethod('destroy', options);
      this.stopListening();
  
      return this;
    },
  
    // Import the `triggerMethod` to trigger events with corresponding
    // methods if the method exists
    triggerMethod: Marionette.triggerMethod,
  
    // A handy way to merge options onto the instance
    mergeOptions: Marionette.mergeOptions,
  
    // Proxy `getOption` to enable getting options from this or this.options by name.
    getOption: Marionette.proxyGetOption,
  
    // Proxy `bindEntityEvents` to enable binding view's events from another entity.
    bindEntityEvents: Marionette.proxyBindEntityEvents,
  
    // Proxy `unbindEntityEvents` to enable unbinding view's events from another entity.
    unbindEntityEvents: Marionette.proxyUnbindEntityEvents
  });
  
  /* jshint maxcomplexity: 16, maxstatements: 45, maxlen: 120 */
  
  // Region
  // ------
  
  // Manage the visual regions of your composite application. See
  // http://lostechies.com/derickbailey/2011/12/12/composite-js-apps-regions-and-region-managers/
  
  Marionette.Region = Marionette.Object.extend({
    constructor: function(options) {
  
      // set options temporarily so that we can get `el`.
      // options will be overriden by Object.constructor
      this.options = options || {};
      this.el = this.getOption('el');
  
      // Handle when this.el is passed in as a $ wrapped element.
      this.el = this.el instanceof Backbone.$ ? this.el[0] : this.el;
  
      if (!this.el) {
        throw new Marionette.Error({
          name: 'NoElError',
          message: 'An "el" must be specified for a region.'
        });
      }
  
      this.$el = this.getEl(this.el);
      Marionette.Object.call(this, options);
    },
  
    // Displays a backbone view instance inside of the region.
    // Handles calling the `render` method for you. Reads content
    // directly from the `el` attribute. Also calls an optional
    // `onShow` and `onDestroy` method on your view, just after showing
    // or just before destroying the view, respectively.
    // The `preventDestroy` option can be used to prevent a view from
    // the old view being destroyed on show.
    // The `forceShow` option can be used to force a view to be
    // re-rendered if it's already shown in the region.
    show: function(view, options) {
      if (!this._ensureElement()) {
        return;
      }
  
      this._ensureViewIsIntact(view);
      Marionette.MonitorDOMRefresh(view);
  
      var showOptions     = options || {};
      var isDifferentView = view !== this.currentView;
      var preventDestroy  = !!showOptions.preventDestroy;
      var forceShow       = !!showOptions.forceShow;
  
      // We are only changing the view if there is a current view to change to begin with
      var isChangingView = !!this.currentView;
  
      // Only destroy the current view if we don't want to `preventDestroy` and if
      // the view given in the first argument is different than `currentView`
      var _shouldDestroyView = isDifferentView && !preventDestroy;
  
      // Only show the view given in the first argument if it is different than
      // the current view or if we want to re-show the view. Note that if
      // `_shouldDestroyView` is true, then `_shouldShowView` is also necessarily true.
      var _shouldShowView = isDifferentView || forceShow;
  
      if (isChangingView) {
        this.triggerMethod('before:swapOut', this.currentView, this, options);
      }
  
      if (this.currentView && isDifferentView) {
        delete this.currentView._parent;
      }
  
      if (_shouldDestroyView) {
        this.empty();
  
      // A `destroy` event is attached to the clean up manually removed views.
      // We need to detach this event when a new view is going to be shown as it
      // is no longer relevant.
      } else if (isChangingView && _shouldShowView) {
        this.currentView.off('destroy', this.empty, this);
      }
  
      if (_shouldShowView) {
  
        // We need to listen for if a view is destroyed
        // in a way other than through the region.
        // If this happens we need to remove the reference
        // to the currentView since once a view has been destroyed
        // we can not reuse it.
        view.once('destroy', this.empty, this);
  
        // make this region the view's parent,
        // It's important that this parent binding happens before rendering
        // so that any events the child may trigger during render can also be
        // triggered on the child's ancestor views
        view._parent = this;
        this._renderView(view);
  
        if (isChangingView) {
          this.triggerMethod('before:swap', view, this, options);
        }
  
        this.triggerMethod('before:show', view, this, options);
        Marionette.triggerMethodOn(view, 'before:show', view, this, options);
  
        if (isChangingView) {
          this.triggerMethod('swapOut', this.currentView, this, options);
        }
  
        // An array of views that we're about to display
        var attachedRegion = Marionette.isNodeAttached(this.el);
  
        // The views that we're about to attach to the document
        // It's important that we prevent _getNestedViews from being executed unnecessarily
        // as it's a potentially-slow method
        var displayedViews = [];
  
        var attachOptions = _.extend({
          triggerBeforeAttach: this.triggerBeforeAttach,
          triggerAttach: this.triggerAttach
        }, showOptions);
  
        if (attachedRegion && attachOptions.triggerBeforeAttach) {
          displayedViews = this._displayedViews(view);
          this._triggerAttach(displayedViews, 'before:');
        }
  
        this.attachHtml(view);
        this.currentView = view;
  
        if (attachedRegion && attachOptions.triggerAttach) {
          displayedViews = this._displayedViews(view);
          this._triggerAttach(displayedViews);
        }
  
        if (isChangingView) {
          this.triggerMethod('swap', view, this, options);
        }
  
        this.triggerMethod('show', view, this, options);
        Marionette.triggerMethodOn(view, 'show', view, this, options);
  
        return this;
      }
  
      return this;
    },
  
    triggerBeforeAttach: true,
    triggerAttach: true,
  
    _triggerAttach: function(views, prefix) {
      var eventName = (prefix || '') + 'attach';
      _.each(views, function(view) {
        Marionette.triggerMethodOn(view, eventName, view, this);
      }, this);
    },
  
    _displayedViews: function(view) {
      return _.union([view], _.result(view, '_getNestedViews') || []);
    },
  
    _renderView: function(view) {
      if (!view.supportsRenderLifecycle) {
        Marionette.triggerMethodOn(view, 'before:render', view);
      }
      view.render();
      if (!view.supportsRenderLifecycle) {
        Marionette.triggerMethodOn(view, 'render', view);
      }
    },
  
    _ensureElement: function() {
      if (!_.isObject(this.el)) {
        this.$el = this.getEl(this.el);
        this.el = this.$el[0];
      }
  
      if (!this.$el || this.$el.length === 0) {
        if (this.getOption('allowMissingEl')) {
          return false;
        } else {
          throw new Marionette.Error('An "el" ' + this.$el.selector + ' must exist in DOM');
        }
      }
      return true;
    },
  
    _ensureViewIsIntact: function(view) {
      if (!view) {
        throw new Marionette.Error({
          name: 'ViewNotValid',
          message: 'The view passed is undefined and therefore invalid. You must pass a view instance to show.'
        });
      }
  
      if (view.isDestroyed) {
        throw new Marionette.Error({
          name: 'ViewDestroyedError',
          message: 'View (cid: "' + view.cid + '") has already been destroyed and cannot be used.'
        });
      }
    },
  
    // Override this method to change how the region finds the DOM
    // element that it manages. Return a jQuery selector object scoped
    // to a provided parent el or the document if none exists.
    getEl: function(el) {
      return Backbone.$(el, Marionette._getValue(this.options.parentEl, this));
    },
  
    // Override this method to change how the new view is
    // appended to the `$el` that the region is managing
    attachHtml: function(view) {
      this.$el.contents().detach();
  
      this.el.appendChild(view.el);
    },
  
    // Destroy the current view, if there is one. If there is no
    // current view, it does nothing and returns immediately.
    empty: function(options) {
      var view = this.currentView;
  
      var emptyOptions = options || {};
      var preventDestroy  = !!emptyOptions.preventDestroy;
      // If there is no view in the region
      // we should not remove anything
      if (!view) { return this; }
  
      view.off('destroy', this.empty, this);
      this.triggerMethod('before:empty', view);
      if (!preventDestroy) {
        this._destroyView();
      }
      this.triggerMethod('empty', view);
  
      // Remove region pointer to the currentView
      delete this.currentView;
  
      if (preventDestroy) {
        this.$el.contents().detach();
      }
  
      return this;
    },
  
    // call 'destroy' or 'remove', depending on which is found
    // on the view (if showing a raw Backbone view or a Marionette View)
    _destroyView: function() {
      var view = this.currentView;
      if (view.isDestroyed) { return; }
  
      if (!view.supportsDestroyLifecycle) {
        Marionette.triggerMethodOn(view, 'before:destroy', view);
      }
      if (view.destroy) {
        view.destroy();
      } else {
        view.remove();
  
        // appending isDestroyed to raw Backbone View allows regions
        // to throw a ViewDestroyedError for this view
        view.isDestroyed = true;
      }
      if (!view.supportsDestroyLifecycle) {
        Marionette.triggerMethodOn(view, 'destroy', view);
      }
    },
  
    // Attach an existing view to the region. This
    // will not call `render` or `onShow` for the new view,
    // and will not replace the current HTML for the `el`
    // of the region.
    attachView: function(view) {
      if (this.currentView) {
        delete this.currentView._parent;
      }
      view._parent = this;
      this.currentView = view;
      return this;
    },
  
    // Checks whether a view is currently present within
    // the region. Returns `true` if there is and `false` if
    // no view is present.
    hasView: function() {
      return !!this.currentView;
    },
  
    // Reset the region by destroying any existing view and
    // clearing out the cached `$el`. The next time a view
    // is shown via this region, the region will re-query the
    // DOM for the region's `el`.
    reset: function() {
      this.empty();
  
      if (this.$el) {
      	// 2020-12-20 Changed for compatibility with jQuery 3.
        this.el = this.options.el;
      }
  
      delete this.$el;
      return this;
    }
  
  },
  
  // Static Methods
  {
  
    // Build an instance of a region by passing in a configuration object
    // and a default region class to use if none is specified in the config.
    //
    // The config object should either be a string as a jQuery DOM selector,
    // a Region class directly, or an object literal that specifies a selector,
    // a custom regionClass, and any options to be supplied to the region:
    //
    // ```js
    // {
    //   selector: "#foo",
    //   regionClass: MyCustomRegion,
    //   allowMissingEl: false
    // }
    // ```
    //
    buildRegion: function(regionConfig, DefaultRegionClass) {
      if (_.isString(regionConfig)) {
        return this._buildRegionFromSelector(regionConfig, DefaultRegionClass);
      }
  
      if (regionConfig.selector || regionConfig.el || regionConfig.regionClass) {
        return this._buildRegionFromObject(regionConfig, DefaultRegionClass);
      }
  
      if (_.isFunction(regionConfig)) {
        return this._buildRegionFromRegionClass(regionConfig);
      }
  
      throw new Marionette.Error({
        message: 'Improper region configuration type.',
        url: 'marionette.region.html#region-configuration-types'
      });
    },
  
    // Build the region from a string selector like '#foo-region'
    _buildRegionFromSelector: function(selector, DefaultRegionClass) {
      return new DefaultRegionClass({el: selector});
    },
  
    // Build the region from a configuration object
    // ```js
    // { selector: '#foo', regionClass: FooRegion, allowMissingEl: false }
    // ```
    _buildRegionFromObject: function(regionConfig, DefaultRegionClass) {
      var RegionClass = regionConfig.regionClass || DefaultRegionClass;
      var options = _.omit(regionConfig, 'selector', 'regionClass');
  
      if (regionConfig.selector && !options.el) {
        options.el = regionConfig.selector;
      }
  
      return new RegionClass(options);
    },
  
    // Build the region directly from a given `RegionClass`
    _buildRegionFromRegionClass: function(RegionClass) {
      return new RegionClass();
    }
  });
  
  // Region Manager
  // --------------
  
  // Manage one or more related `Marionette.Region` objects.
  Marionette.RegionManager = Marionette.Controller.extend({
    constructor: function(options) {
      this._regions = {};
      this.length = 0;
  
      Marionette.Controller.call(this, options);
  
      this.addRegions(this.getOption('regions'));
    },
  
    // Add multiple regions using an object literal or a
    // function that returns an object literal, where
    // each key becomes the region name, and each value is
    // the region definition.
    addRegions: function(regionDefinitions, defaults) {
      regionDefinitions = Marionette._getValue(regionDefinitions, this, arguments);
  
      return _.reduce(regionDefinitions, function(regions, definition, name) {
        if (_.isString(definition)) {
          definition = {selector: definition};
        }
        if (definition.selector) {
          definition = _.defaults({}, definition, defaults);
        }
  
        regions[name] = this.addRegion(name, definition);
        return regions;
      }, {}, this);
    },
  
    // Add an individual region to the region manager,
    // and return the region instance
    addRegion: function(name, definition) {
      var region;
  
      if (definition instanceof Marionette.Region) {
        region = definition;
      } else {
        region = Marionette.Region.buildRegion(definition, Marionette.Region);
      }
  
      this.triggerMethod('before:add:region', name, region);
  
      region._parent = this;
      this._store(name, region);
  
      this.triggerMethod('add:region', name, region);
      return region;
    },
  
    // Get a region by name
    get: function(name) {
      return this._regions[name];
    },
  
    // Gets all the regions contained within
    // the `regionManager` instance.
    getRegions: function() {
      return _.clone(this._regions);
    },
  
    // Remove a region by name
    removeRegion: function(name) {
      var region = this._regions[name];
      this._remove(name, region);
  
      return region;
    },
  
    // Empty all regions in the region manager, and
    // remove them
    removeRegions: function() {
      var regions = this.getRegions();
      _.each(this._regions, function(region, name) {
        this._remove(name, region);
      }, this);
  
      return regions;
    },
  
    // Empty all regions in the region manager, but
    // leave them attached
    emptyRegions: function() {
      var regions = this.getRegions();
      _.invoke(regions, 'empty');
      return regions;
    },
  
    // Destroy all regions and shut down the region
    // manager entirely
    destroy: function() {
      this.removeRegions();
      return Marionette.Controller.prototype.destroy.apply(this, arguments);
    },
  
    // internal method to store regions
    _store: function(name, region) {
      if (!this._regions[name]) {
        this.length++;
      }
  
      this._regions[name] = region;
    },
  
    // internal method to remove a region
    _remove: function(name, region) {
      this.triggerMethod('before:remove:region', name, region);
      region.empty();
      region.stopListening();
  
      delete region._parent;
      delete this._regions[name];
      this.length--;
      this.triggerMethod('remove:region', name, region);
    }
  });
  
  Marionette.actAsCollection(Marionette.RegionManager.prototype, '_regions');
  

  // Template Cache
  // --------------
  
  // Manage templates stored in `<script>` blocks,
  // caching them for faster access.
  Marionette.TemplateCache = function(templateId) {
    this.templateId = templateId;
  };
  
  // TemplateCache object-level methods. Manage the template
  // caches from these method calls instead of creating
  // your own TemplateCache instances
  _.extend(Marionette.TemplateCache, {
    templateCaches: {},
  
    // Get the specified template by id. Either
    // retrieves the cached version, or loads it
    // from the DOM.
    get: function(templateId, options) {
      var cachedTemplate = this.templateCaches[templateId];
  
      if (!cachedTemplate) {
        cachedTemplate = new Marionette.TemplateCache(templateId);
        this.templateCaches[templateId] = cachedTemplate;
      }
  
      return cachedTemplate.load(options);
    },
  
    // Clear templates from the cache. If no arguments
    // are specified, clears all templates:
    // `clear()`
    //
    // If arguments are specified, clears each of the
    // specified templates from the cache:
    // `clear("#t1", "#t2", "...")`
    clear: function() {
      var i;
      var args = _.toArray(arguments);
      var length = args.length;
  
      if (length > 0) {
        for (i = 0; i < length; i++) {
          delete this.templateCaches[args[i]];
        }
      } else {
        this.templateCaches = {};
      }
    }
  });
  
  // TemplateCache instance methods, allowing each
  // template cache object to manage its own state
  // and know whether or not it has been loaded
  _.extend(Marionette.TemplateCache.prototype, {
  
    // Internal method to load the template
    load: function(options) {
      // Guard clause to prevent loading this template more than once
      if (this.compiledTemplate) {
        return this.compiledTemplate;
      }
  
      // Load the template and compile it
      var template = this.loadTemplate(this.templateId, options);
      this.compiledTemplate = this.compileTemplate(template, options);
  
      return this.compiledTemplate;
    },
  
    // Load a template from the DOM, by default. Override
    // this method to provide your own template retrieval
    // For asynchronous loading with AMD/RequireJS, consider
    // using a template-loader plugin as described here:
    // https://github.com/marionettejs/backbone.marionette/wiki/Using-marionette-with-requirejs
    loadTemplate: function(templateId, options) {
      var $template = Backbone.$(templateId);
  
      if (!$template.length) {
        throw new Marionette.Error({
          name: 'NoTemplateError',
          message: 'Could not find template: "' + templateId + '"'
        });
      }
      return $template.html();
    },
  
    // Pre-compile the template before caching it. Override
    // this method if you do not need to pre-compile a template
    // (JST / RequireJS for example) or if you want to change
    // the template engine used (Handebars, etc).
    compileTemplate: function(rawTemplate, options) {
      return _.template(rawTemplate, options);
    }
  });
  
  // Renderer
  // --------
  
  // Render a template with data by passing in the template
  // selector and the data to render.
  Marionette.Renderer = {
  
    // Render a template with data. The `template` parameter is
    // passed to the `TemplateCache` object to retrieve the
    // template function. Override this method to provide your own
    // custom rendering and template handling for all of Marionette.
    render: function(template, data) {
      if (!template) {
        throw new Marionette.Error({
          name: 'TemplateNotFoundError',
          message: 'Cannot render the template since its false, null or undefined.'
        });
      }
  
      var templateFunc = _.isFunction(template) ? template : Marionette.TemplateCache.get(template);
  
      return templateFunc(data);
    }
  };
  

  /* jshint maxlen: 114, nonew: false */
  // View
  // ----
  
  // The core view class that other Marionette views extend from.
  Marionette.View = Backbone.View.extend({
    isDestroyed: false,
    supportsRenderLifecycle: true,
    supportsDestroyLifecycle: true,
  
    constructor: function(options) {
      this.render = _.bind(this.render, this);
  
      options = Marionette._getValue(options, this);
  
      // this exposes view options to the view initializer
      // this is a backfill since backbone removed the assignment
      // of this.options
      // at some point however this may be removed
      this.options = _.extend({}, _.result(this, 'options'), options);
  
      this._behaviors = Marionette.Behaviors(this);
  
      Backbone.View.call(this, this.options);
  
      Marionette.MonitorDOMRefresh(this);
    },
  
    // Get the template for this view
    // instance. You can set a `template` attribute in the view
    // definition or pass a `template: "whatever"` parameter in
    // to the constructor options.
    getTemplate: function() {
      return this.getOption('template');
    },
  
    // Serialize a model by returning its attributes. Clones
    // the attributes to allow modification.
    serializeModel: function(model) {
      return model.toJSON.apply(model, _.rest(arguments));
    },
  
    // Mix in template helper methods. Looks for a
    // `templateHelpers` attribute, which can either be an
    // object literal, or a function that returns an object
    // literal. All methods and attributes from this object
    // are copies to the object passed in.
    mixinTemplateHelpers: function(target) {
      target = target || {};
      var templateHelpers = this.getOption('templateHelpers');
      templateHelpers = Marionette._getValue(templateHelpers, this);
      return _.extend(target, templateHelpers);
    },
  
    // normalize the keys of passed hash with the views `ui` selectors.
    // `{"@ui.foo": "bar"}`
    normalizeUIKeys: function(hash) {
      var uiBindings = _.result(this, '_uiBindings');
      return Marionette.normalizeUIKeys(hash, uiBindings || _.result(this, 'ui'));
    },
  
    // normalize the values of passed hash with the views `ui` selectors.
    // `{foo: "@ui.bar"}`
    normalizeUIValues: function(hash, properties) {
      var ui = _.result(this, 'ui');
      var uiBindings = _.result(this, '_uiBindings');
      return Marionette.normalizeUIValues(hash, uiBindings || ui, properties);
    },
  
    // Configure `triggers` to forward DOM events to view
    // events. `triggers: {"click .foo": "do:foo"}`
    configureTriggers: function() {
      if (!this.triggers) { return; }
  
      // Allow `triggers` to be configured as a function
      var triggers = this.normalizeUIKeys(_.result(this, 'triggers'));
  
      // Configure the triggers, prevent default
      // action and stop propagation of DOM events
      return _.reduce(triggers, function(events, value, key) {
        events[key] = this._buildViewTrigger(value);
        return events;
      }, {}, this);
    },
  
    // Overriding Backbone.View's delegateEvents to handle
    // the `triggers`, `modelEvents`, and `collectionEvents` configuration
    delegateEvents: function(events) {
      this._delegateDOMEvents(events);
      this.bindEntityEvents(this.model, this.getOption('modelEvents'));
      this.bindEntityEvents(this.collection, this.getOption('collectionEvents'));
  
      _.each(this._behaviors, function(behavior) {
        behavior.bindEntityEvents(this.model, behavior.getOption('modelEvents'));
        behavior.bindEntityEvents(this.collection, behavior.getOption('collectionEvents'));
      }, this);
  
      return this;
    },
  
    // internal method to delegate DOM events and triggers
    _delegateDOMEvents: function(eventsArg) {
      var events = Marionette._getValue(eventsArg || this.events, this);
  
      // normalize ui keys
      events = this.normalizeUIKeys(events);
      if (_.isUndefined(eventsArg)) {this.events = events;}
  
      var combinedEvents = {};
  
      // look up if this view has behavior events
      var behaviorEvents = _.result(this, 'behaviorEvents') || {};
      var triggers = this.configureTriggers();
      var behaviorTriggers = _.result(this, 'behaviorTriggers') || {};
  
      // behavior events will be overriden by view events and or triggers
      _.extend(combinedEvents, behaviorEvents, events, triggers, behaviorTriggers);
  
      Backbone.View.prototype.delegateEvents.call(this, combinedEvents);
    },
  
    // Overriding Backbone.View's undelegateEvents to handle unbinding
    // the `triggers`, `modelEvents`, and `collectionEvents` config
    undelegateEvents: function() {
      Backbone.View.prototype.undelegateEvents.apply(this, arguments);
  
      this.unbindEntityEvents(this.model, this.getOption('modelEvents'));
      this.unbindEntityEvents(this.collection, this.getOption('collectionEvents'));
  
      _.each(this._behaviors, function(behavior) {
        behavior.unbindEntityEvents(this.model, behavior.getOption('modelEvents'));
        behavior.unbindEntityEvents(this.collection, behavior.getOption('collectionEvents'));
      }, this);
  
      return this;
    },
  
    // Internal helper method to verify whether the view hasn't been destroyed
    _ensureViewIsIntact: function() {
      if (this.isDestroyed) {
        throw new Marionette.Error({
          name: 'ViewDestroyedError',
          message: 'View (cid: "' + this.cid + '") has already been destroyed and cannot be used.'
        });
      }
    },
  
    // Default `destroy` implementation, for removing a view from the
    // DOM and unbinding it. Regions will call this method
    // for you. You can specify an `onDestroy` method in your view to
    // add custom code that is called after the view is destroyed.
    destroy: function() {
      if (this.isDestroyed) { return this; }
  
      var args = _.toArray(arguments);
  
      this.triggerMethod.apply(this, ['before:destroy'].concat(args));
  
      // mark as destroyed before doing the actual destroy, to
      // prevent infinite loops within "destroy" event handlers
      // that are trying to destroy other views
      this.isDestroyed = true;
      this.triggerMethod.apply(this, ['destroy'].concat(args));
  
      // unbind UI elements
      this.unbindUIElements();
  
      this.isRendered = false;
  
      // remove the view from the DOM
      this.remove();
  
      // Call destroy on each behavior after
      // destroying the view.
      // This unbinds event listeners
      // that behaviors have registered for.
      _.invoke(this._behaviors, 'destroy', args);
  
      return this;
    },
  
    bindUIElements: function() {
      this._bindUIElements();
      _.invoke(this._behaviors, this._bindUIElements);
    },
  
    // This method binds the elements specified in the "ui" hash inside the view's code with
    // the associated jQuery selectors.
    _bindUIElements: function() {
      if (!this.ui) { return; }
  
      // store the ui hash in _uiBindings so they can be reset later
      // and so re-rendering the view will be able to find the bindings
      if (!this._uiBindings) {
        this._uiBindings = this.ui;
      }
  
      // get the bindings result, as a function or otherwise
      var bindings = _.result(this, '_uiBindings');
  
      // empty the ui so we don't have anything to start with
      this.ui = {};
  
      // bind each of the selectors
      _.each(bindings, function(selector, key) {
        this.ui[key] = this.$(selector);
      }, this);
    },
  
    // This method unbinds the elements specified in the "ui" hash
    unbindUIElements: function() {
      this._unbindUIElements();
      _.invoke(this._behaviors, this._unbindUIElements);
    },
  
    _unbindUIElements: function() {
      if (!this.ui || !this._uiBindings) { return; }
  
      // delete all of the existing ui bindings
      _.each(this.ui, function($el, name) {
        delete this.ui[name];
      }, this);
  
      // reset the ui element to the original bindings configuration
      this.ui = this._uiBindings;
      delete this._uiBindings;
    },
  
    // Internal method to create an event handler for a given `triggerDef` like
    // 'click:foo'
    _buildViewTrigger: function(triggerDef) {
  
      var options = _.defaults({}, triggerDef, {
        preventDefault: true,
        stopPropagation: true
      });
  
      var eventName = _.isObject(triggerDef) ? options.event : triggerDef;
  
      return function(e) {
        if (e) {
          if (e.preventDefault && options.preventDefault) {
            e.preventDefault();
          }
  
          if (e.stopPropagation && options.stopPropagation) {
            e.stopPropagation();
          }
        }
  
        var args = {
          view: this,
          model: this.model,
          collection: this.collection
        };
  
        this.triggerMethod(eventName, args);
      };
    },
  
    setElement: function() {
      var ret = Backbone.View.prototype.setElement.apply(this, arguments);
  
      // proxy behavior $el to the view's $el.
      // This is needed because a view's $el proxy
      // is not set until after setElement is called.
      _.invoke(this._behaviors, 'proxyViewProperties', this);
  
      return ret;
    },
  
    // import the `triggerMethod` to trigger events with corresponding
    // methods if the method exists
    triggerMethod: function() {
      var ret = Marionette._triggerMethod(this, arguments);
  
      this._triggerEventOnBehaviors(arguments);
      this._triggerEventOnParentLayout(arguments[0], _.rest(arguments));
  
      return ret;
    },
  
    _triggerEventOnBehaviors: function(args) {
      var triggerMethod = Marionette._triggerMethod;
      var behaviors = this._behaviors;
      // Use good ol' for as this is a very hot function
      for (var i = 0, length = behaviors && behaviors.length; i < length; i++) {
        triggerMethod(behaviors[i], args);
      }
    },
  
    _triggerEventOnParentLayout: function(eventName, args) {
      var layoutView = this._parentLayoutView();
      if (!layoutView) {
        return;
      }
  
      // invoke triggerMethod on parent view
      var eventPrefix = Marionette.getOption(layoutView, 'childViewEventPrefix');
      var prefixedEventName = eventPrefix + ':' + eventName;
      var callArgs = [this].concat(args);
  
      Marionette._triggerMethod(layoutView, prefixedEventName, callArgs);
  
      // call the parent view's childEvents handler
      var childEvents = Marionette.getOption(layoutView, 'childEvents');
  
      // since childEvents can be an object or a function use Marionette._getValue
      // to handle the abstaction for us.
      childEvents = Marionette._getValue(childEvents, layoutView);
      var normalizedChildEvents = layoutView.normalizeMethods(childEvents);
  
      if (normalizedChildEvents && _.isFunction(normalizedChildEvents[eventName])) {
        normalizedChildEvents[eventName].apply(layoutView, callArgs);
      }
    },
  
    // This method returns any views that are immediate
    // children of this view
    _getImmediateChildren: function() {
      return [];
    },
  
    // Returns an array of every nested view within this view
    _getNestedViews: function() {
      var children = this._getImmediateChildren();
  
      if (!children.length) { return children; }
  
      return _.reduce(children, function(memo, view) {
        if (!view._getNestedViews) { return memo; }
        return memo.concat(view._getNestedViews());
      }, children);
    },
  
    // Walk the _parent tree until we find a layout view (if one exists).
    // Returns the parent layout view hierarchically closest to this view.
    _parentLayoutView: function() {
      var parent  = this._parent;
  
      while (parent) {
        if (parent instanceof Marionette.LayoutView) {
          return parent;
        }
        parent = parent._parent;
      }
    },
  
    // Imports the "normalizeMethods" to transform hashes of
    // events=>function references/names to a hash of events=>function references
    normalizeMethods: Marionette.normalizeMethods,
  
    // A handy way to merge passed-in options onto the instance
    mergeOptions: Marionette.mergeOptions,
  
    // Proxy `getOption` to enable getting options from this or this.options by name.
    getOption: Marionette.proxyGetOption,
  
    // Proxy `bindEntityEvents` to enable binding view's events from another entity.
    bindEntityEvents: Marionette.proxyBindEntityEvents,
  
    // Proxy `unbindEntityEvents` to enable unbinding view's events from another entity.
    unbindEntityEvents: Marionette.proxyUnbindEntityEvents
  });
  
  // Item View
  // ---------
  
  // A single item view implementation that contains code for rendering
  // with underscore.js templates, serializing the view's model or collection,
  // and calling several methods on extended views, such as `onRender`.
  Marionette.ItemView = Marionette.View.extend({
  
    // Setting up the inheritance chain which allows changes to
    // Marionette.View.prototype.constructor which allows overriding
    constructor: function() {
      Marionette.View.apply(this, arguments);
    },
  
    // Serialize the model or collection for the view. If a model is
    // found, the view's `serializeModel` is called. If a collection is found,
    // each model in the collection is serialized by calling
    // the view's `serializeCollection` and put into an `items` array in
    // the resulting data. If both are found, defaults to the model.
    // You can override the `serializeData` method in your own view definition,
    // to provide custom serialization for your view's data.
    serializeData: function() {
      if (!this.model && !this.collection) {
        return {};
      }
  
      var args = [this.model || this.collection];
      if (arguments.length) {
        args.push.apply(args, arguments);
      }
  
      if (this.model) {
        return this.serializeModel.apply(this, args);
      } else {
        return {
          items: this.serializeCollection.apply(this, args)
        };
      }
    },
  
    // Serialize a collection by serializing each of its models.
    serializeCollection: function(collection) {
      return collection.toJSON.apply(collection, _.rest(arguments));
    },
  
    // Render the view, defaulting to underscore.js templates.
    // You can override this in your view definition to provide
    // a very specific rendering for your view. In general, though,
    // you should override the `Marionette.Renderer` object to
    // change how Marionette renders views.
    render: function() {
      this._ensureViewIsIntact();
  
      this.triggerMethod('before:render', this);
  
      this._renderTemplate();
      this.isRendered = true;
      this.bindUIElements();
  
      this.triggerMethod('render', this);
  
      return this;
    },
  
    // Internal method to render the template with the serialized data
    // and template helpers via the `Marionette.Renderer` object.
    // Throws an `UndefinedTemplateError` error if the template is
    // any falsely value but literal `false`.
    _renderTemplate: function() {
      var template = this.getTemplate();
  
      // Allow template-less item views
      if (template === false) {
        return;
      }
  
      if (!template) {
        throw new Marionette.Error({
          name: 'UndefinedTemplateError',
          message: 'Cannot render the template since it is null or undefined.'
        });
      }
  
      // Add in entity data and template helpers
      var data = this.mixinTemplateHelpers(this.serializeData());
  
      // Render and add to el
      var html = Marionette.Renderer.render(template, data, this);
      this.attachElContent(html);
  
      return this;
    },
  
    // Attaches the content of a given view.
    // This method can be overridden to optimize rendering,
    // or to render in a non standard way.
    //
    // For example, using `innerHTML` instead of `$el.html`
    //
    // ```js
    // attachElContent: function(html) {
    //   this.el.innerHTML = html;
    //   return this;
    // }
    // ```
    attachElContent: function(html) {
      this.$el.html(html);
  
      return this;
    }
  });
  
  /* jshint maxstatements: 20, maxcomplexity: 7 */
  
  // Collection View
  // ---------------
  
  // A view that iterates over a Backbone.Collection
  // and renders an individual child view for each model.
  Marionette.CollectionView = Marionette.View.extend({
  
    // used as the prefix for child view events
    // that are forwarded through the collectionview
    childViewEventPrefix: 'childview',
  
    // flag for maintaining the sorted order of the collection
    sort: true,
  
    // constructor
    // option to pass `{sort: false}` to prevent the `CollectionView` from
    // maintaining the sorted order of the collection.
    // This will fallback onto appending childView's to the end.
    //
    // option to pass `{comparator: compFunction()}` to allow the `CollectionView`
    // to use a custom sort order for the collection.
    constructor: function(options) {
      this.once('render', this._initialEvents);
      this._initChildViewStorage();
  
      Marionette.View.apply(this, arguments);
  
      this.on({
        'before:show':   this._onBeforeShowCalled,
        'show':          this._onShowCalled,
        'before:attach': this._onBeforeAttachCalled,
        'attach':        this._onAttachCalled
      });
      this.initRenderBuffer();
    },
  
    // Instead of inserting elements one by one into the page,
    // it's much more performant to insert elements into a document
    // fragment and then insert that document fragment into the page
    initRenderBuffer: function() {
      this._bufferedChildren = [];
    },
  
    startBuffering: function() {
      this.initRenderBuffer();
      this.isBuffering = true;
    },
  
    endBuffering: function() {
      // Only trigger attach if already shown and attached, otherwise Region#show() handles this.
      var canTriggerAttach = this._isShown && Marionette.isNodeAttached(this.el);
      var nestedViews;
  
      this.isBuffering = false;
  
      if (this._isShown) {
        this._triggerMethodMany(this._bufferedChildren, this, 'before:show');
      }
      if (canTriggerAttach && this._triggerBeforeAttach) {
        nestedViews = this._getNestedViews();
        this._triggerMethodMany(nestedViews, this, 'before:attach');
      }
  
      this.attachBuffer(this, this._createBuffer());
  
      if (canTriggerAttach && this._triggerAttach) {
        nestedViews = this._getNestedViews();
        this._triggerMethodMany(nestedViews, this, 'attach');
      }
      if (this._isShown) {
        this._triggerMethodMany(this._bufferedChildren, this, 'show');
      }
      this.initRenderBuffer();
    },
  
    _triggerMethodMany: function(targets, source, eventName) {
      var args = _.drop(arguments, 3);
  
      _.each(targets, function(target) {
        Marionette.triggerMethodOn.apply(target, [target, eventName, target, source].concat(args));
      });
    },
  
    // Configured the initial events that the collection view
    // binds to.
    _initialEvents: function() {
      if (this.collection) {
        this.listenTo(this.collection, 'add', this._onCollectionAdd);
        this.listenTo(this.collection, 'remove', this._onCollectionRemove);
        this.listenTo(this.collection, 'reset', this.render);
  
        if (this.getOption('sort')) {
          this.listenTo(this.collection, 'sort', this._sortViews);
        }
      }
    },
  
    // Handle a child added to the collection
    _onCollectionAdd: function(child, collection, opts) {
      // `index` is present when adding with `at` since BB 1.2; indexOf fallback for < 1.2
      var index = opts.at !== undefined && (opts.index || collection.indexOf(child));
  
      // When filtered or when there is no initial index, calculate index.
      if (this.getOption('filter') || index === false) {
        index = _.indexOf(this._filteredSortedModels(index), child);
      }
  
      if (this._shouldAddChild(child, index)) {
        this.destroyEmptyView();
        var ChildView = this.getChildView(child);
        this.addChild(child, ChildView, index);
      }
    },
  
    // get the child view by model it holds, and remove it
    _onCollectionRemove: function(model) {
      var view = this.children.findByModel(model);
      this.removeChildView(view);
      this.checkEmpty();
    },
  
    _onBeforeShowCalled: function() {
      // Reset attach event flags at the top of the Region#show() event lifecycle; if the Region's
      // show() options permit onBeforeAttach/onAttach events, these flags will be set true again.
      this._triggerBeforeAttach = this._triggerAttach = false;
      this.children.each(function(childView) {
        Marionette.triggerMethodOn(childView, 'before:show', childView);
      });
    },
  
    _onShowCalled: function() {
      this.children.each(function(childView) {
        Marionette.triggerMethodOn(childView, 'show', childView);
      });
    },
  
    // If during Region#show() onBeforeAttach was fired, continue firing it for child views
    _onBeforeAttachCalled: function() {
      this._triggerBeforeAttach = true;
    },
  
    // If during Region#show() onAttach was fired, continue firing it for child views
    _onAttachCalled: function() {
      this._triggerAttach = true;
    },
  
    // Render children views. Override this method to
    // provide your own implementation of a render function for
    // the collection view.
    render: function() {
      this._ensureViewIsIntact();
      this.triggerMethod('before:render', this);
      this._renderChildren();
      this.isRendered = true;
      this.triggerMethod('render', this);
      return this;
    },
  
    // Reorder DOM after sorting. When your element's rendering
    // do not use their index, you can pass reorderOnSort: true
    // to only reorder the DOM after a sort instead of rendering
    // all the collectionView
    reorder: function() {
      var children = this.children;
      var models = this._filteredSortedModels();
      var anyModelsAdded = _.some(models, function(model) {
        return !children.findByModel(model);
      });
  
      // If there are any new models added due to filtering
      // We need to add child views
      // So render as normal
      if (anyModelsAdded) {
        this.render();
      } else {
        // get the DOM nodes in the same order as the models
        var elsToReorder = _.map(models, function(model, index) {
          var view = children.findByModel(model);
          view._index = index;
          return view.el;
        });
  
        // find the views that were children before but arent in this new ordering
        var filteredOutViews = children.filter(function(view) {
          return !_.contains(elsToReorder, view.el);
        });
  
        this.triggerMethod('before:reorder');
  
        // since append moves elements that are already in the DOM,
        // appending the elements will effectively reorder them
        this._appendReorderedChildren(elsToReorder);
  
        // remove any views that have been filtered out
        _.each(filteredOutViews, this.removeChildView, this);
        this.checkEmpty();
  
        this.triggerMethod('reorder');
      }
    },
  
    // Render view after sorting. Override this method to
    // change how the view renders after a `sort` on the collection.
    // An example of this would be to only `renderChildren` in a `CompositeView`
    // rather than the full view.
    resortView: function() {
      if (Marionette.getOption(this, 'reorderOnSort')) {
        this.reorder();
      } else {
        this.render();
      }
    },
  
    // Internal method. This checks for any changes in the order of the collection.
    // If the index of any view doesn't match, it will render.
    _sortViews: function() {
      var models = this._filteredSortedModels();
  
      // check for any changes in sort order of views
      var orderChanged = _.find(models, function(item, index) {
        var view = this.children.findByModel(item);
        return !view || view._index !== index;
      }, this);
  
      if (orderChanged) {
        this.resortView();
      }
    },
  
    // Internal reference to what index a `emptyView` is.
    _emptyViewIndex: -1,
  
    // Internal method. Separated so that CompositeView can append to the childViewContainer
    // if necessary
    _appendReorderedChildren: function(children) {
      this.$el.append(children);
    },
  
    // Internal method. Separated so that CompositeView can have
    // more control over events being triggered, around the rendering
    // process
    _renderChildren: function() {
      this.destroyEmptyView();
      this.destroyChildren({checkEmpty: false});
  
      if (this.isEmpty(this.collection)) {
        this.showEmptyView();
      } else {
        this.triggerMethod('before:render:collection', this);
        this.startBuffering();
        this.showCollection();
        this.endBuffering();
        this.triggerMethod('render:collection', this);
  
        // If we have shown children and none have passed the filter, show the empty view
        if (this.children.isEmpty() && this.getOption('filter')) {
          this.showEmptyView();
        }
      }
    },
  
    // Internal method to loop through collection and show each child view.
    showCollection: function() {
      var ChildView;
  
      var models = this._filteredSortedModels();
  
      _.each(models, function(child, index) {
        ChildView = this.getChildView(child);
        this.addChild(child, ChildView, index);
      }, this);
    },
  
    // Allow the collection to be sorted by a custom view comparator
    _filteredSortedModels: function(addedAt) {
      var viewComparator = this.getViewComparator();
      var models = this.collection.models;
      addedAt = Math.min(Math.max(addedAt, 0), models.length - 1);
  
      if (viewComparator) {
        var addedModel;
        // Preserve `at` location, even for a sorted view
        if (addedAt) {
          addedModel = models[addedAt];
          models = models.slice(0, addedAt).concat(models.slice(addedAt + 1));
        }
        models = this._sortModelsBy(models, viewComparator);
        if (addedModel) {
          models.splice(addedAt, 0, addedModel);
        }
      }
  
      // Filter after sorting in case the filter uses the index
      if (this.getOption('filter')) {
        models = _.filter(models, function(model, index) {
          return this._shouldAddChild(model, index);
        }, this);
      }
  
      return models;
    },
  
    _sortModelsBy: function(models, comparator) {
      if (typeof comparator === 'string') {
        return _.sortBy(models, function(model) {
          return model.get(comparator);
        }, this);
      } else if (comparator.length === 1) {
        return _.sortBy(models, comparator, this);
      } else {
        return models.sort(_.bind(comparator, this));
      }
    },
  
    // Internal method to show an empty view in place of
    // a collection of child views, when the collection is empty
    showEmptyView: function() {
      var EmptyView = this.getEmptyView();
  
      if (EmptyView && !this._showingEmptyView) {
        this.triggerMethod('before:render:empty');
  
        this._showingEmptyView = true;
        var model = new Backbone.Model();
        this.addEmptyView(model, EmptyView);
  
        this.triggerMethod('render:empty');
      }
    },
  
    // Internal method to destroy an existing emptyView instance
    // if one exists. Called when a collection view has been
    // rendered empty, and then a child is added to the collection.
    destroyEmptyView: function() {
      if (this._showingEmptyView) {
        this.triggerMethod('before:remove:empty');
  
        this.destroyChildren();
        delete this._showingEmptyView;
  
        this.triggerMethod('remove:empty');
      }
    },
  
    // Retrieve the empty view class
    getEmptyView: function() {
      return this.getOption('emptyView');
    },
  
    // Render and show the emptyView. Similar to addChild method
    // but "add:child" events are not fired, and the event from
    // emptyView are not forwarded
    addEmptyView: function(child, EmptyView) {
      // Only trigger attach if already shown, attached, and not buffering, otherwise endBuffer() or
      // Region#show() handles this.
      var canTriggerAttach = this._isShown && !this.isBuffering && Marionette.isNodeAttached(this.el);
      var nestedViews;
  
      // get the emptyViewOptions, falling back to childViewOptions
      var emptyViewOptions = this.getOption('emptyViewOptions') ||
                            this.getOption('childViewOptions');
  
      if (_.isFunction(emptyViewOptions)) {
        emptyViewOptions = emptyViewOptions.call(this, child, this._emptyViewIndex);
      }
  
      // build the empty view
      var view = this.buildChildView(child, EmptyView, emptyViewOptions);
  
      view._parent = this;
  
      // Proxy emptyView events
      this.proxyChildEvents(view);
  
      view.once('render', function() {
        // trigger the 'before:show' event on `view` if the collection view has already been shown
        if (this._isShown) {
          Marionette.triggerMethodOn(view, 'before:show', view);
        }
  
        // Trigger `before:attach` following `render` to avoid adding logic and event triggers
        // to public method `renderChildView()`.
        if (canTriggerAttach && this._triggerBeforeAttach) {
          nestedViews = this._getViewAndNested(view);
          this._triggerMethodMany(nestedViews, this, 'before:attach');
        }
      }, this);
  
      // Store the `emptyView` like a `childView` so we can properly remove and/or close it later
      this.children.add(view);
      this.renderChildView(view, this._emptyViewIndex);
  
      // Trigger `attach`
      if (canTriggerAttach && this._triggerAttach) {
        nestedViews = this._getViewAndNested(view);
        this._triggerMethodMany(nestedViews, this, 'attach');
      }
      // call the 'show' method if the collection view has already been shown
      if (this._isShown) {
        Marionette.triggerMethodOn(view, 'show', view);
      }
    },
  
    // Retrieve the `childView` class, either from `this.options.childView`
    // or from the `childView` in the object definition. The "options"
    // takes precedence.
    // This method receives the model that will be passed to the instance
    // created from this `childView`. Overriding methods may use the child
    // to determine what `childView` class to return.
    getChildView: function(child) {
      var childView = this.getOption('childView');
  
      if (!childView) {
        throw new Marionette.Error({
          name: 'NoChildViewError',
          message: 'A "childView" must be specified'
        });
      }
  
      return childView;
    },
  
    // Render the child's view and add it to the
    // HTML for the collection view at a given index.
    // This will also update the indices of later views in the collection
    // in order to keep the children in sync with the collection.
    addChild: function(child, ChildView, index) {
      var childViewOptions = this.getOption('childViewOptions');
      childViewOptions = Marionette._getValue(childViewOptions, this, [child, index]);
  
      var view = this.buildChildView(child, ChildView, childViewOptions);
  
      // increment indices of views after this one
      this._updateIndices(view, true, index);
  
      this.triggerMethod('before:add:child', view);
      this._addChildView(view, index);
      this.triggerMethod('add:child', view);
  
      view._parent = this;
  
      return view;
    },
  
    // Internal method. This decrements or increments the indices of views after the
    // added/removed view to keep in sync with the collection.
    _updateIndices: function(view, increment, index) {
      if (!this.getOption('sort')) {
        return;
      }
  
      if (increment) {
        // assign the index to the view
        view._index = index;
      }
  
      // update the indexes of views after this one
      this.children.each(function(laterView) {
        if (laterView._index >= view._index) {
          laterView._index += increment ? 1 : -1;
        }
      });
    },
  
    // Internal Method. Add the view to children and render it at
    // the given index.
    _addChildView: function(view, index) {
      // Only trigger attach if already shown, attached, and not buffering, otherwise endBuffer() or
      // Region#show() handles this.
      var canTriggerAttach = this._isShown && !this.isBuffering && Marionette.isNodeAttached(this.el);
      var nestedViews;
  
      // set up the child view event forwarding
      this.proxyChildEvents(view);
  
      view.once('render', function() {
        // trigger the 'before:show' event on `view` if the collection view has already been shown
        if (this._isShown && !this.isBuffering) {
          Marionette.triggerMethodOn(view, 'before:show', view);
        }
  
        // Trigger `before:attach` following `render` to avoid adding logic and event triggers
        // to public method `renderChildView()`.
        if (canTriggerAttach && this._triggerBeforeAttach) {
          nestedViews = this._getViewAndNested(view);
          this._triggerMethodMany(nestedViews, this, 'before:attach');
        }
      }, this);
  
      // Store the child view itself so we can properly remove and/or destroy it later
      this.children.add(view);
      this.renderChildView(view, index);
  
      // Trigger `attach`
      if (canTriggerAttach && this._triggerAttach) {
        nestedViews = this._getViewAndNested(view);
        this._triggerMethodMany(nestedViews, this, 'attach');
      }
      // Trigger `show`
      if (this._isShown && !this.isBuffering) {
        Marionette.triggerMethodOn(view, 'show', view);
      }
    },
  
    // render the child view
    renderChildView: function(view, index) {
      if (!view.supportsRenderLifecycle) {
        Marionette.triggerMethodOn(view, 'before:render', view);
      }
      view.render();
      if (!view.supportsRenderLifecycle) {
        Marionette.triggerMethodOn(view, 'render', view);
      }
      this.attachHtml(this, view, index);
      return view;
    },
  
    // Build a `childView` for a model in the collection.
    buildChildView: function(child, ChildViewClass, childViewOptions) {
      var options = _.extend({model: child}, childViewOptions);
      var childView = new ChildViewClass(options);
      Marionette.MonitorDOMRefresh(childView);
      return childView;
    },
  
    // Remove the child view and destroy it.
    // This function also updates the indices of
    // later views in the collection in order to keep
    // the children in sync with the collection.
    removeChildView: function(view) {
      if (!view) { return view; }
  
      this.triggerMethod('before:remove:child', view);
  
      if (!view.supportsDestroyLifecycle) {
        Marionette.triggerMethodOn(view, 'before:destroy', view);
      }
      // call 'destroy' or 'remove', depending on which is found
      if (view.destroy) {
        view.destroy();
      } else {
        view.remove();
      }
      if (!view.supportsDestroyLifecycle) {
        Marionette.triggerMethodOn(view, 'destroy', view);
      }
  
      delete view._parent;
      this.stopListening(view);
      this.children.remove(view);
      this.triggerMethod('remove:child', view);
  
      // decrement the index of views after this one
      this._updateIndices(view, false);
  
      return view;
    },
  
    // check if the collection is empty
    isEmpty: function() {
      return !this.collection || this.collection.length === 0;
    },
  
    // If empty, show the empty view
    checkEmpty: function() {
      if (this.isEmpty(this.collection)) {
        this.showEmptyView();
      }
    },
  
    // You might need to override this if you've overridden attachHtml
    attachBuffer: function(collectionView, buffer) {
      collectionView.$el.append(buffer);
    },
  
    // Create a fragment buffer from the currently buffered children
    _createBuffer: function() {
      var elBuffer = document.createDocumentFragment();
      _.each(this._bufferedChildren, function(b) {
        elBuffer.appendChild(b.el);
      });
      return elBuffer;
    },
  
    // Append the HTML to the collection's `el`.
    // Override this method to do something other
    // than `.append`.
    attachHtml: function(collectionView, childView, index) {
      if (collectionView.isBuffering) {
        // buffering happens on reset events and initial renders
        // in order to reduce the number of inserts into the
        // document, which are expensive.
        collectionView._bufferedChildren.splice(index, 0, childView);
      } else {
        // If we've already rendered the main collection, append
        // the new child into the correct order if we need to. Otherwise
        // append to the end.
        if (!collectionView._insertBefore(childView, index)) {
          collectionView._insertAfter(childView);
        }
      }
    },
  
    // Internal method. Check whether we need to insert the view into
    // the correct position.
    _insertBefore: function(childView, index) {
      var currentView;
      var findPosition = this.getOption('sort') && (index < this.children.length - 1);
      if (findPosition) {
        // Find the view after this one
        currentView = this.children.find(function(view) {
          return view._index === index + 1;
        });
      }
  
      if (currentView) {
        currentView.$el.before(childView.el);
        return true;
      }
  
      return false;
    },
  
    // Internal method. Append a view to the end of the $el
    _insertAfter: function(childView) {
      this.$el.append(childView.el);
    },
  
    // Internal method to set up the `children` object for
    // storing all of the child views
    _initChildViewStorage: function() {
      this.children = new Backbone.ChildViewContainer();
    },
  
    // Handle cleanup and other destroying needs for the collection of views
    destroy: function() {
      if (this.isDestroyed) { return this; }
  
      this.triggerMethod('before:destroy:collection');
      this.destroyChildren({checkEmpty: false});
      this.triggerMethod('destroy:collection');
  
      return Marionette.View.prototype.destroy.apply(this, arguments);
    },
  
    // Destroy the child views that this collection view
    // is holding on to, if any
    destroyChildren: function(options) {
      var destroyOptions = options || {};
      var shouldCheckEmpty = true;
      var childViews = this.children.map(_.identity);
  
      if (!_.isUndefined(destroyOptions.checkEmpty)) {
        shouldCheckEmpty = destroyOptions.checkEmpty;
      }
  
      this.children.each(this.removeChildView, this);
  
      if (shouldCheckEmpty) {
        this.checkEmpty();
      }
      return childViews;
    },
  
    // Return true if the given child should be shown
    // Return false otherwise
    // The filter will be passed (child, index, collection)
    // Where
    //  'child' is the given model
    //  'index' is the index of that model in the collection
    //  'collection' is the collection referenced by this CollectionView
    _shouldAddChild: function(child, index) {
      var filter = this.getOption('filter');
      return !_.isFunction(filter) || filter.call(this, child, index, this.collection);
    },
  
    // Set up the child view event forwarding. Uses a "childview:"
    // prefix in front of all forwarded events.
    proxyChildEvents: function(view) {
      var prefix = this.getOption('childViewEventPrefix');
  
      // Forward all child view events through the parent,
      // prepending "childview:" to the event name
      this.listenTo(view, 'all', function() {
        var args = _.toArray(arguments);
        var rootEvent = args[0];
        var childEvents = this.normalizeMethods(_.result(this, 'childEvents'));
  
        args[0] = prefix + ':' + rootEvent;
        args.splice(1, 0, view);
  
        // call collectionView childEvent if defined
        if (typeof childEvents !== 'undefined' && _.isFunction(childEvents[rootEvent])) {
          childEvents[rootEvent].apply(this, args.slice(1));
        }
  
        this.triggerMethod.apply(this, args);
      });
    },
  
    _getImmediateChildren: function() {
      return _.values(this.children._views);
    },
  
    _getViewAndNested: function(view) {
      // This will not fail on Backbone.View which does not have #_getNestedViews.
      return [view].concat(_.result(view, '_getNestedViews') || []);
    },
  
    getViewComparator: function() {
      return this.getOption('viewComparator');
    }
  });
  
  /* jshint maxstatements: 17, maxlen: 117 */
  
  // Composite View
  // --------------
  
  // Used for rendering a branch-leaf, hierarchical structure.
  // Extends directly from CollectionView and also renders an
  // a child view as `modelView`, for the top leaf
  Marionette.CompositeView = Marionette.CollectionView.extend({
  
    // Setting up the inheritance chain which allows changes to
    // Marionette.CollectionView.prototype.constructor which allows overriding
    // option to pass '{sort: false}' to prevent the CompositeView from
    // maintaining the sorted order of the collection.
    // This will fallback onto appending childView's to the end.
    constructor: function() {
      Marionette.CollectionView.apply(this, arguments);
    },
  
    // Configured the initial events that the composite view
    // binds to. Override this method to prevent the initial
    // events, or to add your own initial events.
    _initialEvents: function() {
  
      // Bind only after composite view is rendered to avoid adding child views
      // to nonexistent childViewContainer
  
      if (this.collection) {
        this.listenTo(this.collection, 'add', this._onCollectionAdd);
        this.listenTo(this.collection, 'remove', this._onCollectionRemove);
        this.listenTo(this.collection, 'reset', this._renderChildren);
  
        if (this.getOption('sort')) {
          this.listenTo(this.collection, 'sort', this._sortViews);
        }
      }
    },
  
    // Retrieve the `childView` to be used when rendering each of
    // the items in the collection. The default is to return
    // `this.childView` or Marionette.CompositeView if no `childView`
    // has been defined
    getChildView: function(child) {
      var childView = this.getOption('childView') || this.constructor;
  
      return childView;
    },
  
    // Serialize the model for the view.
    // You can override the `serializeData` method in your own view
    // definition, to provide custom serialization for your view's data.
    serializeData: function() {
      var data = {};
  
      if (this.model) {
        data = _.partial(this.serializeModel, this.model).apply(this, arguments);
      }
  
      return data;
    },
  
    // Renders the model and the collection.
    render: function() {
      this._ensureViewIsIntact();
      this._isRendering = true;
      this.resetChildViewContainer();
  
      this.triggerMethod('before:render', this);
  
      this._renderTemplate();
      this._renderChildren();
  
      this._isRendering = false;
      this.isRendered = true;
      this.triggerMethod('render', this);
      return this;
    },
  
    _renderChildren: function() {
      if (this.isRendered || this._isRendering) {
        Marionette.CollectionView.prototype._renderChildren.call(this);
      }
    },
  
    // Render the root template that the children
    // views are appended to
    _renderTemplate: function() {
      var data = {};
      data = this.serializeData();
      data = this.mixinTemplateHelpers(data);
  
      this.triggerMethod('before:render:template');
  
      var template = this.getTemplate();
      var html = Marionette.Renderer.render(template, data, this);
      this.attachElContent(html);
  
      // the ui bindings is done here and not at the end of render since they
      // will not be available until after the model is rendered, but should be
      // available before the collection is rendered.
      this.bindUIElements();
      this.triggerMethod('render:template');
    },
  
    // Attaches the content of the root.
    // This method can be overridden to optimize rendering,
    // or to render in a non standard way.
    //
    // For example, using `innerHTML` instead of `$el.html`
    //
    // ```js
    // attachElContent: function(html) {
    //   this.el.innerHTML = html;
    //   return this;
    // }
    // ```
    attachElContent: function(html) {
      this.$el.html(html);
  
      return this;
    },
  
    // You might need to override this if you've overridden attachHtml
    attachBuffer: function(compositeView, buffer) {
      var $container = this.getChildViewContainer(compositeView);
      $container.append(buffer);
    },
  
    // Internal method. Append a view to the end of the $el.
    // Overidden from CollectionView to ensure view is appended to
    // childViewContainer
    _insertAfter: function(childView) {
      var $container = this.getChildViewContainer(this, childView);
      $container.append(childView.el);
    },
  
    // Internal method. Append reordered childView'.
    // Overidden from CollectionView to ensure reordered views
    // are appended to childViewContainer
    _appendReorderedChildren: function(children) {
      var $container = this.getChildViewContainer(this);
      $container.append(children);
    },
  
    // Internal method to ensure an `$childViewContainer` exists, for the
    // `attachHtml` method to use.
    getChildViewContainer: function(containerView, childView) {
      if (!!containerView.$childViewContainer) {
        return containerView.$childViewContainer;
      }
  
      var container;
      var childViewContainer = Marionette.getOption(containerView, 'childViewContainer');
      if (childViewContainer) {
  
        var selector = Marionette._getValue(childViewContainer, containerView);
  
        if (selector.charAt(0) === '@' && containerView.ui) {
          container = containerView.ui[selector.substr(4)];
        } else {
          container = containerView.$(selector);
        }
  
        if (container.length <= 0) {
          throw new Marionette.Error({
            name: 'ChildViewContainerMissingError',
            message: 'The specified "childViewContainer" was not found: ' + containerView.childViewContainer
          });
        }
  
      } else {
        container = containerView.$el;
      }
  
      containerView.$childViewContainer = container;
      return container;
    },
  
    // Internal method to reset the `$childViewContainer` on render
    resetChildViewContainer: function() {
      if (this.$childViewContainer) {
        this.$childViewContainer = undefined;
      }
    }
  });
  
  // Layout View
  // -----------
  
  // Used for managing application layoutViews, nested layoutViews and
  // multiple regions within an application or sub-application.
  //
  // A specialized view class that renders an area of HTML and then
  // attaches `Region` instances to the specified `regions`.
  // Used for composite view management and sub-application areas.
  Marionette.LayoutView = Marionette.ItemView.extend({
    regionClass: Marionette.Region,
  
    options: {
      destroyImmediate: false
    },
  
    // used as the prefix for child view events
    // that are forwarded through the layoutview
    childViewEventPrefix: 'childview',
  
    // Ensure the regions are available when the `initialize` method
    // is called.
    constructor: function(options) {
      options = options || {};
  
      this._firstRender = true;
      this._initializeRegions(options);
  
      Marionette.ItemView.call(this, options);
    },
  
    // LayoutView's render will use the existing region objects the
    // first time it is called. Subsequent calls will destroy the
    // views that the regions are showing and then reset the `el`
    // for the regions to the newly rendered DOM elements.
    render: function() {
      this._ensureViewIsIntact();
  
      if (this._firstRender) {
        // if this is the first render, don't do anything to
        // reset the regions
        this._firstRender = false;
      } else {
        // If this is not the first render call, then we need to
        // re-initialize the `el` for each region
        this._reInitializeRegions();
      }
  
      return Marionette.ItemView.prototype.render.apply(this, arguments);
    },
  
    // Handle destroying regions, and then destroy the view itself.
    destroy: function() {
      if (this.isDestroyed) { return this; }
      // #2134: remove parent element before destroying the child views, so
      // removing the child views doesn't retrigger repaints
      if (this.getOption('destroyImmediate') === true) {
        this.$el.remove();
      }
      this.regionManager.destroy();
      return Marionette.ItemView.prototype.destroy.apply(this, arguments);
    },
  
    showChildView: function(regionName, view, options) {
      var region = this.getRegion(regionName);
      return region.show.apply(region, _.rest(arguments));
    },
  
    getChildView: function(regionName) {
      return this.getRegion(regionName).currentView;
    },
  
    // Add a single region, by name, to the layoutView
    addRegion: function(name, definition) {
      var regions = {};
      regions[name] = definition;
      return this._buildRegions(regions)[name];
    },
  
    // Add multiple regions as a {name: definition, name2: def2} object literal
    addRegions: function(regions) {
      this.regions = _.extend({}, this.regions, regions);
      return this._buildRegions(regions);
    },
  
    // Remove a single region from the LayoutView, by name
    removeRegion: function(name) {
      delete this.regions[name];
      return this.regionManager.removeRegion(name);
    },
  
    // Provides alternative access to regions
    // Accepts the region name
    // getRegion('main')
    getRegion: function(region) {
      return this.regionManager.get(region);
    },
  
    // Get all regions
    getRegions: function() {
      return this.regionManager.getRegions();
    },
  
    // internal method to build regions
    _buildRegions: function(regions) {
      var defaults = {
        regionClass: this.getOption('regionClass'),
        parentEl: _.partial(_.result, this, 'el')
      };
  
      return this.regionManager.addRegions(regions, defaults);
    },
  
    // Internal method to initialize the regions that have been defined in a
    // `regions` attribute on this layoutView.
    _initializeRegions: function(options) {
      var regions;
      this._initRegionManager();
  
      regions = Marionette._getValue(this.regions, this, [options]) || {};
  
      // Enable users to define `regions` as instance options.
      var regionOptions = this.getOption.call(options, 'regions');
  
      // enable region options to be a function
      regionOptions = Marionette._getValue(regionOptions, this, [options]);
  
      _.extend(regions, regionOptions);
  
      // Normalize region selectors hash to allow
      // a user to use the @ui. syntax.
      regions = this.normalizeUIValues(regions, ['selector', 'el']);
  
      this.addRegions(regions);
    },
  
    // Internal method to re-initialize all of the regions by updating the `el` that
    // they point to
    _reInitializeRegions: function() {
      this.regionManager.invoke('reset');
    },
  
    // Enable easy overriding of the default `RegionManager`
    // for customized region interactions and business specific
    // view logic for better control over single regions.
    getRegionManager: function() {
      return new Marionette.RegionManager();
    },
  
    // Internal method to initialize the region manager
    // and all regions in it
    _initRegionManager: function() {
      this.regionManager = this.getRegionManager();
      this.regionManager._parent = this;
  
      this.listenTo(this.regionManager, 'before:add:region', function(name) {
        this.triggerMethod('before:add:region', name);
      });
  
      this.listenTo(this.regionManager, 'add:region', function(name, region) {
        this[name] = region;
        this.triggerMethod('add:region', name, region);
      });
  
      this.listenTo(this.regionManager, 'before:remove:region', function(name) {
        this.triggerMethod('before:remove:region', name);
      });
  
      this.listenTo(this.regionManager, 'remove:region', function(name, region) {
        delete this[name];
        this.triggerMethod('remove:region', name, region);
      });
    },
  
    _getImmediateChildren: function() {
      return _.chain(this.regionManager.getRegions())
        .pluck('currentView')
        .compact()
        .value();
    }
  });
  

  // Behavior
  // --------
  
  // A Behavior is an isolated set of DOM /
  // user interactions that can be mixed into any View.
  // Behaviors allow you to blackbox View specific interactions
  // into portable logical chunks, keeping your views simple and your code DRY.
  
  Marionette.Behavior = Marionette.Object.extend({
    constructor: function(options, view) {
      // Setup reference to the view.
      // this comes in handle when a behavior
      // wants to directly talk up the chain
      // to the view.
      this.view = view;
      this.defaults = _.result(this, 'defaults') || {};
      this.options  = _.extend({}, this.defaults, options);
      // Construct an internal UI hash using
      // the views UI hash and then the behaviors UI hash.
      // This allows the user to use UI hash elements
      // defined in the parent view as well as those
      // defined in the given behavior.
      this.ui = _.extend({}, _.result(view, 'ui'), _.result(this, 'ui'));
  
      Marionette.Object.apply(this, arguments);
    },
  
    // proxy behavior $ method to the view
    // this is useful for doing jquery DOM lookups
    // scoped to behaviors view.
    $: function() {
      return this.view.$.apply(this.view, arguments);
    },
  
    // Stops the behavior from listening to events.
    // Overrides Object#destroy to prevent additional events from being triggered.
    destroy: function() {
      this.stopListening();
  
      return this;
    },
  
    proxyViewProperties: function(view) {
      this.$el = view.$el;
      this.el = view.el;
    }
  });
  
  /* jshint maxlen: 143 */
  // Behaviors
  // ---------
  
  // Behaviors is a utility class that takes care of
  // gluing your behavior instances to their given View.
  // The most important part of this class is that you
  // **MUST** override the class level behaviorsLookup
  // method for things to work properly.
  
  Marionette.Behaviors = (function(Marionette, _) {
    // Borrow event splitter from Backbone
    var delegateEventSplitter = /^(\S+)\s*(.*)$/;
  
    function Behaviors(view, behaviors) {
  
      if (!_.isObject(view.behaviors)) {
        return {};
      }
  
      // Behaviors defined on a view can be a flat object literal
      // or it can be a function that returns an object.
      behaviors = Behaviors.parseBehaviors(view, behaviors || _.result(view, 'behaviors'));
  
      // Wraps several of the view's methods
      // calling the methods first on each behavior
      // and then eventually calling the method on the view.
      Behaviors.wrap(view, behaviors, _.keys(methods));
      return behaviors;
    }
  
    var methods = {
      behaviorTriggers: function(behaviorTriggers, behaviors) {
        var triggerBuilder = new BehaviorTriggersBuilder(this, behaviors);
        return triggerBuilder.buildBehaviorTriggers();
      },
  
      behaviorEvents: function(behaviorEvents, behaviors) {
        var _behaviorsEvents = {};
  
        _.each(behaviors, function(b, i) {
          var _events = {};
          var behaviorEvents = _.clone(_.result(b, 'events')) || {};
  
          // Normalize behavior events hash to allow
          // a user to use the @ui. syntax.
          behaviorEvents = Marionette.normalizeUIKeys(behaviorEvents, getBehaviorsUI(b));
  
          var j = 0;
          _.each(behaviorEvents, function(behaviour, key) {
            var match     = key.match(delegateEventSplitter);
  
            // Set event name to be namespaced using the view cid,
            // the behavior index, and the behavior event index
            // to generate a non colliding event namespace
            // http://api.jquery.com/event.namespace/
            var eventName = match[1] + '.' + [this.cid, i, j++, ' '].join('');
            var selector  = match[2];
  
            var eventKey  = eventName + selector;
            var handler   = _.isFunction(behaviour) ? behaviour : b[behaviour];
            if (!handler) { return; }
            _events[eventKey] = _.bind(handler, b);
          }, this);
  
          _behaviorsEvents = _.extend(_behaviorsEvents, _events);
        }, this);
  
        return _behaviorsEvents;
      }
    };
  
    _.extend(Behaviors, {
  
      // Placeholder method to be extended by the user.
      // The method should define the object that stores the behaviors.
      // i.e.
      //
      // ```js
      // Marionette.Behaviors.behaviorsLookup: function() {
      //   return App.Behaviors
      // }
      // ```
      behaviorsLookup: function() {
        throw new Marionette.Error({
          message: 'You must define where your behaviors are stored.',
          url: 'marionette.behaviors.html#behaviorslookup'
        });
      },
  
      // Takes care of getting the behavior class
      // given options and a key.
      // If a user passes in options.behaviorClass
      // default to using that. Otherwise delegate
      // the lookup to the users `behaviorsLookup` implementation.
      getBehaviorClass: function(options, key) {
        if (options.behaviorClass) {
          return options.behaviorClass;
        }
  
        // Get behavior class can be either a flat object or a method
        return Marionette._getValue(Behaviors.behaviorsLookup, this, [options, key])[key];
      },
  
      // Iterate over the behaviors object, for each behavior
      // instantiate it and get its grouped behaviors.
      parseBehaviors: function(view, behaviors) {
        return _.chain(behaviors).map(function(options, key) {
          var BehaviorClass = Behaviors.getBehaviorClass(options, key);
  
          var behavior = new BehaviorClass(options, view);
          var nestedBehaviors = Behaviors.parseBehaviors(view, _.result(behavior, 'behaviors'));
  
          return [behavior].concat(nestedBehaviors);
        }).flatten().value();
      },
  
      // Wrap view internal methods so that they delegate to behaviors. For example,
      // `onDestroy` should trigger destroy on all of the behaviors and then destroy itself.
      // i.e.
      //
      // `view.delegateEvents = _.partial(methods.delegateEvents, view.delegateEvents, behaviors);`
      wrap: function(view, behaviors, methodNames) {
        _.each(methodNames, function(methodName) {
          view[methodName] = _.partial(methods[methodName], view[methodName], behaviors);
        });
      }
    });
  
    // Class to build handlers for `triggers` on behaviors
    // for views
    function BehaviorTriggersBuilder(view, behaviors) {
      this._view      = view;
      this._behaviors = behaviors;
      this._triggers  = {};
    }
  
    _.extend(BehaviorTriggersBuilder.prototype, {
      // Main method to build the triggers hash with event keys and handlers
      buildBehaviorTriggers: function() {
        _.each(this._behaviors, this._buildTriggerHandlersForBehavior, this);
        return this._triggers;
      },
  
      // Internal method to build all trigger handlers for a given behavior
      _buildTriggerHandlersForBehavior: function(behavior, i) {
        var triggersHash = _.clone(_.result(behavior, 'triggers')) || {};
  
        triggersHash = Marionette.normalizeUIKeys(triggersHash, getBehaviorsUI(behavior));
  
        _.each(triggersHash, _.bind(this._setHandlerForBehavior, this, behavior, i));
      },
  
      // Internal method to create and assign the trigger handler for a given
      // behavior
      _setHandlerForBehavior: function(behavior, i, eventName, trigger) {
        // Unique identifier for the `this._triggers` hash
        var triggerKey = trigger.replace(/^\S+/, function(triggerName) {
          return triggerName + '.' + 'behaviortriggers' + i;
        });
  
        this._triggers[triggerKey] = this._view._buildViewTrigger(eventName);
      }
    });
  
    function getBehaviorsUI(behavior) {
      return behavior._uiBindings || behavior.ui;
    }
  
    return Behaviors;
  
  })(Marionette, _);
  

  // App Router
  // ----------
  
  // Reduce the boilerplate code of handling route events
  // and then calling a single method on another object.
  // Have your routers configured to call the method on
  // your object, directly.
  //
  // Configure an AppRouter with `appRoutes`.
  //
  // App routers can only take one `controller` object.
  // It is recommended that you divide your controller
  // objects in to smaller pieces of related functionality
  // and have multiple routers / controllers, instead of
  // just one giant router and controller.
  //
  // You can also add standard routes to an AppRouter.
  
  Marionette.AppRouter = Backbone.Router.extend({
  
    constructor: function(options) {
      this.options = options || {};
  
      Backbone.Router.apply(this, arguments);
  
      var appRoutes = this.getOption('appRoutes');
      var controller = this._getController();
      this.processAppRoutes(controller, appRoutes);
      this.on('route', this._processOnRoute, this);
    },
  
    // Similar to route method on a Backbone Router but
    // method is called on the controller
    appRoute: function(route, methodName) {
      var controller = this._getController();
      this._addAppRoute(controller, route, methodName);
    },
  
    // process the route event and trigger the onRoute
    // method call, if it exists
    _processOnRoute: function(routeName, routeArgs) {
      // make sure an onRoute before trying to call it
      if (_.isFunction(this.onRoute)) {
        // find the path that matches the current route
        var routePath = _.invert(this.getOption('appRoutes'))[routeName];
        this.onRoute(routeName, routePath, routeArgs);
      }
    },
  
    // Internal method to process the `appRoutes` for the
    // router, and turn them in to routes that trigger the
    // specified method on the specified `controller`.
    processAppRoutes: function(controller, appRoutes) {
      if (!appRoutes) { return; }
  
      var routeNames = _.keys(appRoutes).reverse(); // Backbone requires reverted order of routes
  
      _.each(routeNames, function(route) {
        this._addAppRoute(controller, route, appRoutes[route]);
      }, this);
    },
  
    _getController: function() {
      return this.getOption('controller');
    },
  
    _addAppRoute: function(controller, route, methodName) {
      var method = controller[methodName];
  
      if (!method) {
        throw new Marionette.Error('Method "' + methodName + '" was not found on the controller');
      }
  
      this.route(route, methodName, _.bind(method, controller));
    },
  
    mergeOptions: Marionette.mergeOptions,
  
    // Proxy `getOption` to enable getting options from this or this.options by name.
    getOption: Marionette.proxyGetOption,
  
    triggerMethod: Marionette.triggerMethod,
  
    bindEntityEvents: Marionette.proxyBindEntityEvents,
  
    unbindEntityEvents: Marionette.proxyUnbindEntityEvents
  });
  
  // Application
  // -----------
  
  // Contain and manage the composite application as a whole.
  // Stores and starts up `Region` objects, includes an
  // event aggregator as `app.vent`
  Marionette.Application = Marionette.Object.extend({
    constructor: function(options) {
      this._initializeRegions(options);
      this._initCallbacks = new Marionette.Callbacks();
      this.submodules = {};
      _.extend(this, options);
      this._initChannel();
      Marionette.Object.apply(this, arguments);
    },
  
    // Command execution, facilitated by Backbone.Wreqr.Commands
    execute: function() {
      this.commands.execute.apply(this.commands, arguments);
    },
  
    // Request/response, facilitated by Backbone.Wreqr.RequestResponse
    request: function() {
      return this.reqres.request.apply(this.reqres, arguments);
    },
  
    // Add an initializer that is either run at when the `start`
    // method is called, or run immediately if added after `start`
    // has already been called.
    addInitializer: function(initializer) {
      this._initCallbacks.add(initializer);
    },
  
    // kick off all of the application's processes.
    // initializes all of the regions that have been added
    // to the app, and runs all of the initializer functions
    start: function(options) {
      this.triggerMethod('before:start', options);
      this._initCallbacks.run(options, this);
      this.triggerMethod('start', options);
    },
  
    // Add regions to your app.
    // Accepts a hash of named strings or Region objects
    // addRegions({something: "#someRegion"})
    // addRegions({something: Region.extend({el: "#someRegion"}) });
    addRegions: function(regions) {
      return this._regionManager.addRegions(regions);
    },
  
    // Empty all regions in the app, without removing them
    emptyRegions: function() {
      return this._regionManager.emptyRegions();
    },
  
    // Removes a region from your app, by name
    // Accepts the regions name
    // removeRegion('myRegion')
    removeRegion: function(region) {
      return this._regionManager.removeRegion(region);
    },
  
    // Provides alternative access to regions
    // Accepts the region name
    // getRegion('main')
    getRegion: function(region) {
      return this._regionManager.get(region);
    },
  
    // Get all the regions from the region manager
    getRegions: function() {
      return this._regionManager.getRegions();
    },
  
    // Create a module, attached to the application
    module: function(moduleNames, moduleDefinition) {
  
      // Overwrite the module class if the user specifies one
      var ModuleClass = Marionette.Module.getClass(moduleDefinition);
  
      var args = _.toArray(arguments);
      args.unshift(this);
  
      // see the Marionette.Module object for more information
      return ModuleClass.create.apply(ModuleClass, args);
    },
  
    // Enable easy overriding of the default `RegionManager`
    // for customized region interactions and business-specific
    // view logic for better control over single regions.
    getRegionManager: function() {
      return new Marionette.RegionManager();
    },
  
    // Internal method to initialize the regions that have been defined in a
    // `regions` attribute on the application instance
    _initializeRegions: function(options) {
      var regions = _.isFunction(this.regions) ? this.regions(options) : this.regions || {};
  
      this._initRegionManager();
  
      // Enable users to define `regions` in instance options.
      var optionRegions = Marionette.getOption(options, 'regions');
  
      // Enable region options to be a function
      if (_.isFunction(optionRegions)) {
        optionRegions = optionRegions.call(this, options);
      }
  
      // Overwrite current regions with those passed in options
      _.extend(regions, optionRegions);
  
      this.addRegions(regions);
  
      return this;
    },
  
    // Internal method to set up the region manager
    _initRegionManager: function() {
      this._regionManager = this.getRegionManager();
      this._regionManager._parent = this;
  
      this.listenTo(this._regionManager, 'before:add:region', function() {
        Marionette._triggerMethod(this, 'before:add:region', arguments);
      });
  
      this.listenTo(this._regionManager, 'add:region', function(name, region) {
        this[name] = region;
        Marionette._triggerMethod(this, 'add:region', arguments);
      });
  
      this.listenTo(this._regionManager, 'before:remove:region', function() {
        Marionette._triggerMethod(this, 'before:remove:region', arguments);
      });
  
      this.listenTo(this._regionManager, 'remove:region', function(name) {
        delete this[name];
        Marionette._triggerMethod(this, 'remove:region', arguments);
      });
    },
  
    // Internal method to setup the Wreqr.radio channel
    _initChannel: function() {
      this.channelName = _.result(this, 'channelName') || 'global';
      this.channel = _.result(this, 'channel') || Backbone.Wreqr.radio.channel(this.channelName);
      this.vent = _.result(this, 'vent') || this.channel.vent;
      this.commands = _.result(this, 'commands') || this.channel.commands;
      this.reqres = _.result(this, 'reqres') || this.channel.reqres;
    }
  });
  
  /* jshint maxparams: 9 */
  
  // Module
  // ------
  
  // A simple module system, used to create privacy and encapsulation in
  // Marionette applications
  Marionette.Module = function(moduleName, app, options) {
    this.moduleName = moduleName;
    this.options = _.extend({}, this.options, options);
    // Allow for a user to overide the initialize
    // for a given module instance.
    this.initialize = options.initialize || this.initialize;
  
    // Set up an internal store for sub-modules.
    this.submodules = {};
  
    this._setupInitializersAndFinalizers();
  
    // Set an internal reference to the app
    // within a module.
    this.app = app;
  
    if (_.isFunction(this.initialize)) {
      this.initialize(moduleName, app, this.options);
    }
  };
  
  Marionette.Module.extend = Marionette.extend;
  
  // Extend the Module prototype with events / listenTo, so that the module
  // can be used as an event aggregator or pub/sub.
  _.extend(Marionette.Module.prototype, Backbone.Events, {
  
    // By default modules start with their parents.
    startWithParent: true,
  
    // Initialize is an empty function by default. Override it with your own
    // initialization logic when extending Marionette.Module.
    initialize: function() {},
  
    // Initializer for a specific module. Initializers are run when the
    // module's `start` method is called.
    addInitializer: function(callback) {
      this._initializerCallbacks.add(callback);
    },
  
    // Finalizers are run when a module is stopped. They are used to teardown
    // and finalize any variables, references, events and other code that the
    // module had set up.
    addFinalizer: function(callback) {
      this._finalizerCallbacks.add(callback);
    },
  
    // Start the module, and run all of its initializers
    start: function(options) {
      // Prevent re-starting a module that is already started
      if (this._isInitialized) { return; }
  
      // start the sub-modules (depth-first hierarchy)
      _.each(this.submodules, function(mod) {
        // check to see if we should start the sub-module with this parent
        if (mod.startWithParent) {
          mod.start(options);
        }
      });
  
      // run the callbacks to "start" the current module
      this.triggerMethod('before:start', options);
  
      this._initializerCallbacks.run(options, this);
      this._isInitialized = true;
  
      this.triggerMethod('start', options);
    },
  
    // Stop this module by running its finalizers and then stop all of
    // the sub-modules for this module
    stop: function() {
      // if we are not initialized, don't bother finalizing
      if (!this._isInitialized) { return; }
      this._isInitialized = false;
  
      this.triggerMethod('before:stop');
  
      // stop the sub-modules; depth-first, to make sure the
      // sub-modules are stopped / finalized before parents
      _.invoke(this.submodules, 'stop');
  
      // run the finalizers
      this._finalizerCallbacks.run(undefined, this);
  
      // reset the initializers and finalizers
      this._initializerCallbacks.reset();
      this._finalizerCallbacks.reset();
  
      this.triggerMethod('stop');
    },
  
    // Configure the module with a definition function and any custom args
    // that are to be passed in to the definition function
    addDefinition: function(moduleDefinition, customArgs) {
      this._runModuleDefinition(moduleDefinition, customArgs);
    },
  
    // Internal method: run the module definition function with the correct
    // arguments
    _runModuleDefinition: function(definition, customArgs) {
      // If there is no definition short circut the method.
      if (!definition) { return; }
  
      // build the correct list of arguments for the module definition
      var args = _.flatten([
        this,
        this.app,
        Backbone,
        Marionette,
        Backbone.$, _,
        customArgs
      ]);
  
      definition.apply(this, args);
    },
  
    // Internal method: set up new copies of initializers and finalizers.
    // Calling this method will wipe out all existing initializers and
    // finalizers.
    _setupInitializersAndFinalizers: function() {
      this._initializerCallbacks = new Marionette.Callbacks();
      this._finalizerCallbacks = new Marionette.Callbacks();
    },
  
    // import the `triggerMethod` to trigger events with corresponding
    // methods if the method exists
    triggerMethod: Marionette.triggerMethod
  });
  
  // Class methods to create modules
  _.extend(Marionette.Module, {
  
    // Create a module, hanging off the app parameter as the parent object.
    create: function(app, moduleNames, moduleDefinition) {
      var module = app;
  
      // get the custom args passed in after the module definition and
      // get rid of the module name and definition function
      var customArgs = _.drop(arguments, 3);
  
      // Split the module names and get the number of submodules.
      // i.e. an example module name of `Doge.Wow.Amaze` would
      // then have the potential for 3 module definitions.
      moduleNames = moduleNames.split('.');
      var length = moduleNames.length;
  
      // store the module definition for the last module in the chain
      var moduleDefinitions = [];
      moduleDefinitions[length - 1] = moduleDefinition;
  
      // Loop through all the parts of the module definition
      _.each(moduleNames, function(moduleName, i) {
        var parentModule = module;
        module = this._getModule(parentModule, moduleName, app, moduleDefinition);
        this._addModuleDefinition(parentModule, module, moduleDefinitions[i], customArgs);
      }, this);
  
      // Return the last module in the definition chain
      return module;
    },
  
    _getModule: function(parentModule, moduleName, app, def, args) {
      var options = _.extend({}, def);
      var ModuleClass = this.getClass(def);
  
      // Get an existing module of this name if we have one
      var module = parentModule[moduleName];
  
      if (!module) {
        // Create a new module if we don't have one
        module = new ModuleClass(moduleName, app, options);
        parentModule[moduleName] = module;
        // store the module on the parent
        parentModule.submodules[moduleName] = module;
      }
  
      return module;
    },
  
    // ## Module Classes
    //
    // Module classes can be used as an alternative to the define pattern.
    // The extend function of a Module is identical to the extend functions
    // on other Backbone and Marionette classes.
    // This allows module lifecyle events like `onStart` and `onStop` to be called directly.
    getClass: function(moduleDefinition) {
      var ModuleClass = Marionette.Module;
  
      if (!moduleDefinition) {
        return ModuleClass;
      }
  
      // If all of the module's functionality is defined inside its class,
      // then the class can be passed in directly. `MyApp.module("Foo", FooModule)`.
      if (moduleDefinition.prototype instanceof ModuleClass) {
        return moduleDefinition;
      }
  
      return moduleDefinition.moduleClass || ModuleClass;
    },
  
    // Add the module definition and add a startWithParent initializer function.
    // This is complicated because module definitions are heavily overloaded
    // and support an anonymous function, module class, or options object
    _addModuleDefinition: function(parentModule, module, def, args) {
      var fn = this._getDefine(def);
      var startWithParent = this._getStartWithParent(def, module);
  
      if (fn) {
        module.addDefinition(fn, args);
      }
  
      this._addStartWithParent(parentModule, module, startWithParent);
    },
  
    _getStartWithParent: function(def, module) {
      var swp;
  
      if (_.isFunction(def) && (def.prototype instanceof Marionette.Module)) {
        swp = module.constructor.prototype.startWithParent;
        return _.isUndefined(swp) ? true : swp;
      }
  
      if (_.isObject(def)) {
        swp = def.startWithParent;
        return _.isUndefined(swp) ? true : swp;
      }
  
      return true;
    },
  
    _getDefine: function(def) {
      if (_.isFunction(def) && !(def.prototype instanceof Marionette.Module)) {
        return def;
      }
  
      if (_.isObject(def)) {
        return def.define;
      }
  
      return null;
    },
  
    _addStartWithParent: function(parentModule, module, startWithParent) {
      module.startWithParent = module.startWithParent && startWithParent;
  
      if (!module.startWithParent || !!module.startWithParentIsConfigured) {
        return;
      }
  
      module.startWithParentIsConfigured = true;
  
      parentModule.addInitializer(function(options) {
        if (module.startWithParent) {
          module.start(options);
        }
      });
    }
  });
  

  return Marionette;
}));
¿Qué es la limpieza dental de perros? - Clínica veterinaria


Es la eliminación del sarro y la placa adherida a la superficie de los dientes mediante un equipo de ultrasonidos que garantiza la integridad de las piezas dentales a la vez que elimina en profundidad cualquier resto de suciedad.

A continuación se procede al pulido de los dientes mediante una fresa especial que elimina la placa bacteriana y devuelve a los dientes el aspecto sano que deben tener.

Una vez terminado todo el proceso, se mantiene al perro en observación hasta que se despierta de la anestesia, bajo la atenta supervisión de un veterinario.

¿Cada cuánto tiempo tengo que hacerle una limpieza dental a mi perro?

A partir de cierta edad, los perros pueden necesitar una limpieza dental anual o bianual. Depende de cada caso. En líneas generales, puede decirse que los perros de razas pequeñas suelen acumular más sarro y suelen necesitar una atención mayor en cuanto a higiene dental.


Riesgos de una mala higiene


Los riesgos más evidentes de una mala higiene dental en los perros son los siguientes:

  • Cuando la acumulación de sarro no se trata, se puede producir una inflamación y retracción de las encías que puede descalzar el diente y provocar caídas.
  • Mal aliento (halitosis).
  • Sarro perros
  • Puede ir a más
  • Las bacterias de la placa pueden trasladarse a través del torrente circulatorio a órganos vitales como el corazón ocasionando problemas de endocarditis en las válvulas. Las bacterias pueden incluso acantonarse en huesos (La osteomielitis es la infección ósea, tanto cortical como medular) provocando mucho dolor y una artritis séptica).

¿Cómo se forma el sarro?

El sarro es la calcificación de la placa dental. Los restos de alimentos, junto con las bacterias presentes en la boca, van a formar la placa bacteriana o placa dental. Si la placa no se retira, al mezclarse con la saliva y los minerales presentes en ella, reaccionará formando una costra. La placa se calcifica y se forma el sarro.

El sarro, cuando se forma, es de color blanquecino pero a medida que pasa el tiempo se va poniendo amarillo y luego marrón.

Síntomas de una pobre higiene dental
La señal más obvia de una mala salud dental canina es el mal aliento.

Sin embargo, a veces no es tan fácil de detectar
Y hay perros que no se dejan abrir la boca por su dueño. Por ejemplo…

Recientemente nos trajeron a la clínica a un perro que parpadeaba de un ojo y decía su dueño que le picaba un lado de la cara. Tenía molestias y dificultad para comer, lo que había llevado a sus dueños a comprarle comida blanda (que suele ser un poco más cara y llevar más contenido en grasa) durante medio año. Después de una exploración oftalmológica, nos dimos cuenta de que el ojo tenía una úlcera en la córnea probablemente de rascarse . Además, el canto lateral del ojo estaba inflamado. Tenía lo que en humanos llamamos flemón pero como era un perro de pelo largo, no se le notaba a simple vista. Al abrirle la boca nos llamó la atención el ver una muela llena de sarro. Le realizamos una radiografía y encontramos una fístula que llegaba hasta la parte inferior del ojo.

Le tuvimos que extraer la muela. Tras esto, el ojo se curó completamente con unos colirios y una lentilla protectora de úlcera. Afortunadamente, la úlcera no profundizó y no perforó el ojo. Ahora el perro come perfectamente a pesar de haber perdido una muela.

¿Cómo mantener la higiene dental de tu perro?
Hay varias maneras de prevenir problemas derivados de la salud dental de tu perro.

Limpiezas de dientes en casa
Es recomendable limpiar los dientes de tu perro semanal o diariamente si se puede. Existe una gran variedad de productos que se pueden utilizar:

Pastas de dientes.
Cepillos de dientes o dedales para el dedo índice, que hacen más fácil la limpieza.
Colutorios para echar en agua de bebida o directamente sobre el diente en líquido o en spray.

En la Clínica Tus Veterinarios enseñamos a nuestros clientes a tomar el hábito de limpiar los dientes de sus perros desde que son cachorros. Esto responde a nuestro compromiso con la prevención de enfermedades caninas.

Hoy en día tenemos muchos clientes que limpian los dientes todos los días a su mascota, y como resultado, se ahorran el dinero de hacer limpiezas dentales profesionales y consiguen una mejor salud de su perro.


Limpiezas dentales profesionales de perros y gatos

Recomendamos hacer una limpieza dental especializada anualmente. La realizamos con un aparato de ultrasonidos que utiliza agua para quitar el sarro. Después, procedemos a pulir los dientes con un cepillo de alta velocidad y una pasta especial. Hacemos esto para proteger el esmalte.

La frecuencia de limpiezas dentales necesaria varía mucho entre razas. En general, las razas grandes tienen buena calidad de esmalte, por lo que no necesitan hacerlo tan a menudo e incluso pueden pasarse la vida sin requerir una limpieza. Sin embargo, razas pequeñas como el Yorkshire o el Maltés, deben hacérselas todos los años desde cachorros si se quiere conservar sus piezas dentales.

Otro factor fundamental es la calidad del pienso. Algunas marcas han diseñado croquetas que limpian la superficie del diente y de la muela al masticarse.

Ultrasonido para perros

¿Se necesita anestesia para las limpiezas dentales de perros y gatos?

La limpieza dental en perros no es una técnica que pueda practicarse sin anestesia general , aunque hay veces que los propietarios no quieren anestesiar y si tiene poco sarro y el perro es muy bueno se puede intentar…… , pero no se va a poder pulir ni acceder a todas la zona de la boca …. Además los limpiadores dentales van a irrigar agua y hay riesgo de aspiración a vías respiratorias si no se realiza una anestesia correcta con intubación traqueal . En resumen , sin anestesia no se va hacer una correcta limpieza dental.

Tampoco sirve la sedación ya que necesitamos que el animal esté totalmente quieto, y el veterinario tenga un acceso completo a todas sus piezas dentales y encías.

Alimentos para la limpieza dental

Hay que tener cierto cuidado a la hora de comprar determinados alimentos porque no todos son saludables. Algunos tienen demasiado contenido graso, que en exceso puede causar problemas cardiovasculares y obesidad.

Los mejores alimentos para los dientes son aquellos que están elaborados por empresas farmacéuticas y llevan componentes químicos con tratamientos específicos para el diente del perro. Esto implica no solo limpieza a través de la acción mecánica de morder sino también un tratamiento antibacteriano para prevenir el sarro.

Conclusión

Si eres como la mayoría de dueños, por falta de tiempo , es probable que no estés prestando la suficiente atención a la limpieza dental de tu perro. Por eso te animamos a que comiences a limpiar los dientes de tu perro y consideres atender a su higiene bucal con frecuencia.

Estas simples medidas pueden conllevar a que tu perro tenga una vida más larga y mucho más saludable.

Si te resulta imposible introducir un cepillo de dientes a tu perro en la boca, pásate con él por clínica Tus Veterinarios y te explicamos cómo hacerlo.

Necesitas hacer una limpieza dental profesional a tu mascota?
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