testem/lib/reporters/dev/view.js

Test'em 'scripts! Javascript Unit testing made easy.

/*

view.js
==========

Base-class for our view-models.
*/
'use strict';

var Backbone = require('backbone');

// ============== Backbone-based View Models ============================

// View is the base class for our view models. That's right, view-models.
// All of our views carry state of some sort.
module.exports = Backbone.Model.extend({
  observe: function(model, thing) {
    var eventMap;
    if (typeof thing === 'string' && arguments.length === 3) {
      eventMap = {};
      eventMap[thing] = arguments[2];
    } else {
      eventMap = thing;
    }
    for (var event in eventMap) {
      model.on(event, eventMap[event]);
    }
    if (!this.observers) {
      this.observers = [];
    }
    this.observers.push([model, eventMap]);
  },
  destroy: function() {
    this.removeObservers();
  },
  removeObservers: function() {
    if (!this.observers) {
      return;
    }
    this.observers.forEach(function(observer) {
      var model = observer[0];
      var eventMap = observer[1];
      for (var event in eventMap) {
        model.off(event, eventMap[event]);
      }
    });
  }
});