evented-ember-history.js

(function(History) {
  if (!Ember.Object.detectInstance(History)) {
    throw new Error("Native `Ember.History` is already defined.");
  }

  if (Ember.Evented.detect(History)) {
    return;
  } else {
    History.reopen(Ember.Evented);
  }

  History.reopen({
    back: function() {
      window.history.go(-1);
    },

    forward: function() {
      window.history.go(1);
    },

    go: function(count) {
      // most likely an error, explicitly use reload when we mean it
      if (count === 0) {
        throw new Ember.Error("Use `window.location.reload()` instead");
      }
      Ember.assert("Count must be an integer", Math.round(count) === count);
      window.history.go(count);
      this.trigger("go", count);
    },

    pushState: function(state, title, url) {
      window.history.pushState(state, title, url);
      this.trigger("pushState", state, title, url);
    },

    replaceState: function(state, title, url) {
      window.history.replaceState(state, title, url);
      this.trigger("replaceState", state, title, url);
    }
  });
})(Ember.History || (Ember.History = Ember.Object.create()));