/*!
 * @overview RSVP - a tiny implementation of Promises/A+.
 * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors
 * @license   Licensed under MIT license
 *            See https://raw.githubusercontent.com/tildeio/rsvp.js/master/LICENSE
 * @version   3.1.0
 */

(function() {
    "use strict";
    function lib$rsvp$utils$$objectOrFunction(x) {
      return typeof x === 'function' || (typeof x === 'object' && x !== null);
    }

    function lib$rsvp$utils$$isFunction(x) {
      return typeof x === 'function';
    }

    function lib$rsvp$utils$$isMaybeThenable(x) {
      return typeof x === 'object' && x !== null;
    }

    var lib$rsvp$utils$$_isArray;
    if (!Array.isArray) {
      lib$rsvp$utils$$_isArray = function (x) {
        return Object.prototype.toString.call(x) === '[object Array]';
      };
    } else {
      lib$rsvp$utils$$_isArray = Array.isArray;
    }

    var lib$rsvp$utils$$isArray = lib$rsvp$utils$$_isArray;

    var lib$rsvp$utils$$now = Date.now || function() { return new Date().getTime(); };

    function lib$rsvp$utils$$F() { }

    var lib$rsvp$utils$$o_create = (Object.create || function (o) {
      if (arguments.length > 1) {
        throw new Error('Second argument not supported');
      }
      if (typeof o !== 'object') {
        throw new TypeError('Argument must be an object');
      }
      lib$rsvp$utils$$F.prototype = o;
      return new lib$rsvp$utils$$F();
    });
    function lib$rsvp$events$$indexOf(callbacks, callback) {
      for (var i=0, l=callbacks.length; i<l; i++) {
        if (callbacks[i] === callback) { return i; }
      }

      return -1;
    }

    function lib$rsvp$events$$callbacksFor(object) {
      var callbacks = object._promiseCallbacks;

      if (!callbacks) {
        callbacks = object._promiseCallbacks = {};
      }

      return callbacks;
    }

    var lib$rsvp$events$$default = {

      /**
        `RSVP.EventTarget.mixin` extends an object with EventTarget methods. For
        Example:

        ```javascript
        var object = {};

        RSVP.EventTarget.mixin(object);

        object.on('finished', function(event) {
          // handle event
        });

        object.trigger('finished', { detail: value });
        ```

        `EventTarget.mixin` also works with prototypes:

        ```javascript
        var Person = function() {};
        RSVP.EventTarget.mixin(Person.prototype);

        var yehuda = new Person();
        var tom = new Person();

        yehuda.on('poke', function(event) {
          console.log('Yehuda says OW');
        });

        tom.on('poke', function(event) {
          console.log('Tom says OW');
        });

        yehuda.trigger('poke');
        tom.trigger('poke');
        ```

        @method mixin
        @for RSVP.EventTarget
        @private
        @param {Object} object object to extend with EventTarget methods
      */
      'mixin': function(object) {
        object['on']      = this['on'];
        object['off']     = this['off'];
        object['trigger'] = this['trigger'];
        object._promiseCallbacks = undefined;
        return object;
      },

      /**
        Registers a callback to be executed when `eventName` is triggered

        ```javascript
        object.on('event', function(eventInfo){
          // handle the event
        });

        object.trigger('event');
        ```

        @method on
        @for RSVP.EventTarget
        @private
        @param {String} eventName name of the event to listen for
        @param {Function} callback function to be called when the event is triggered.
      */
      'on': function(eventName, callback) {
        if (typeof callback !== 'function') {
          throw new TypeError('Callback must be a function');
        }

        var allCallbacks = lib$rsvp$events$$callbacksFor(this), callbacks;

        callbacks = allCallbacks[eventName];

        if (!callbacks) {
          callbacks = allCallbacks[eventName] = [];
        }

        if (lib$rsvp$events$$indexOf(callbacks, callback) === -1) {
          callbacks.push(callback);
        }
      },

      /**
        You can use `off` to stop firing a particular callback for an event:

        ```javascript
        function doStuff() { // do stuff! }
        object.on('stuff', doStuff);

        object.trigger('stuff'); // doStuff will be called

        // Unregister ONLY the doStuff callback
        object.off('stuff', doStuff);
        object.trigger('stuff'); // doStuff will NOT be called
        ```

        If you don't pass a `callback` argument to `off`, ALL callbacks for the
        event will not be executed when the event fires. For example:

        ```javascript
        var callback1 = function(){};
        var callback2 = function(){};

        object.on('stuff', callback1);
        object.on('stuff', callback2);

        object.trigger('stuff'); // callback1 and callback2 will be executed.

        object.off('stuff');
        object.trigger('stuff'); // callback1 and callback2 will not be executed!
        ```

        @method off
        @for RSVP.EventTarget
        @private
        @param {String} eventName event to stop listening to
        @param {Function} callback optional argument. If given, only the function
        given will be removed from the event's callback queue. If no `callback`
        argument is given, all callbacks will be removed from the event's callback
        queue.
      */
      'off': function(eventName, callback) {
        var allCallbacks = lib$rsvp$events$$callbacksFor(this), callbacks, index;

        if (!callback) {
          allCallbacks[eventName] = [];
          return;
        }

        callbacks = allCallbacks[eventName];

        index = lib$rsvp$events$$indexOf(callbacks, callback);

        if (index !== -1) { callbacks.splice(index, 1); }
      },

      /**
        Use `trigger` to fire custom events. For example:

        ```javascript
        object.on('foo', function(){
          console.log('foo event happened!');
        });
        object.trigger('foo');
        // 'foo event happened!' logged to the console
        ```

        You can also pass a value as a second argument to `trigger` that will be
        passed as an argument to all event listeners for the event:

        ```javascript
        object.on('foo', function(value){
          console.log(value.name);
        });

        object.trigger('foo', { name: 'bar' });
        // 'bar' logged to the console
        ```

        @method trigger
        @for RSVP.EventTarget
        @private
        @param {String} eventName name of the event to be triggered
        @param {*} options optional value to be passed to any event handlers for
        the given `eventName`
      */
      'trigger': function(eventName, options, label) {
        var allCallbacks = lib$rsvp$events$$callbacksFor(this), callbacks, callback;

        if (callbacks = allCallbacks[eventName]) {
          // Don't cache the callbacks.length since it may grow
          for (var i=0; i<callbacks.length; i++) {
            callback = callbacks[i];

            callback(options, label);
          }
        }
      }
    };

    var lib$rsvp$config$$config = {
      instrument: false
    };

    lib$rsvp$events$$default['mixin'](lib$rsvp$config$$config);

    function lib$rsvp$config$$configure(name, value) {
      if (name === 'onerror') {
        // handle for legacy users that expect the actual
        // error to be passed to their function added via
        // `RSVP.configure('onerror', someFunctionHere);`
        lib$rsvp$config$$config['on']('error', value);
        return;
      }

      if (arguments.length === 2) {
        lib$rsvp$config$$config[name] = value;
      } else {
        return lib$rsvp$config$$config[name];
      }
    }

    var lib$rsvp$instrument$$queue = [];

    function lib$rsvp$instrument$$scheduleFlush() {
      setTimeout(function() {
        var entry;
        for (var i = 0; i < lib$rsvp$instrument$$queue.length; i++) {
          entry = lib$rsvp$instrument$$queue[i];

          var payload = entry.payload;

          payload.guid = payload.key + payload.id;
          payload.childGuid = payload.key + payload.childId;
          if (payload.error) {
            payload.stack = payload.error.stack;
          }

          lib$rsvp$config$$config['trigger'](entry.name, entry.payload);
        }
        lib$rsvp$instrument$$queue.length = 0;
      }, 50);
    }

    function lib$rsvp$instrument$$instrument(eventName, promise, child) {
      if (1 === lib$rsvp$instrument$$queue.push({
        name: eventName,
        payload: {
          key: promise._guidKey,
          id:  promise._id,
          eventName: eventName,
          detail: promise._result,
          childId: child && child._id,
          label: promise._label,
          timeStamp: lib$rsvp$utils$$now(),
          error: lib$rsvp$config$$config["instrument-with-stack"] ? new Error(promise._label) : null
        }})) {
          lib$rsvp$instrument$$scheduleFlush();
        }
      }
    var lib$rsvp$instrument$$default = lib$rsvp$instrument$$instrument;

    function  lib$rsvp$$internal$$withOwnPromise() {
      return new TypeError('A promises callback cannot return that same promise.');
    }

    function lib$rsvp$$internal$$noop() {}

    var lib$rsvp$$internal$$PENDING   = void 0;
    var lib$rsvp$$internal$$FULFILLED = 1;
    var lib$rsvp$$internal$$REJECTED  = 2;

    var lib$rsvp$$internal$$GET_THEN_ERROR = new lib$rsvp$$internal$$ErrorObject();

    function lib$rsvp$$internal$$getThen(promise) {
      try {
        return promise.then;
      } catch(error) {
        lib$rsvp$$internal$$GET_THEN_ERROR.error = error;
        return lib$rsvp$$internal$$GET_THEN_ERROR;
      }
    }

    function lib$rsvp$$internal$$tryThen(then, value, fulfillmentHandler, rejectionHandler) {
      try {
        then.call(value, fulfillmentHandler, rejectionHandler);
      } catch(e) {
        return e;
      }
    }

    function lib$rsvp$$internal$$handleForeignThenable(promise, thenable, then) {
      lib$rsvp$config$$config.async(function(promise) {
        var sealed = false;
        var error = lib$rsvp$$internal$$tryThen(then, thenable, function(value) {
          if (sealed) { return; }
          sealed = true;
          if (thenable !== value) {
            lib$rsvp$$internal$$resolve(promise, value);
          } else {
            lib$rsvp$$internal$$fulfill(promise, value);
          }
        }, function(reason) {
          if (sealed) { return; }
          sealed = true;

          lib$rsvp$$internal$$reject(promise, reason);
        }, 'Settle: ' + (promise._label || ' unknown promise'));

        if (!sealed && error) {
          sealed = true;
          lib$rsvp$$internal$$reject(promise, error);
        }
      }, promise);
    }

    function lib$rsvp$$internal$$handleOwnThenable(promise, thenable) {
      if (thenable._state === lib$rsvp$$internal$$FULFILLED) {
        lib$rsvp$$internal$$fulfill(promise, thenable._result);
      } else if (thenable._state === lib$rsvp$$internal$$REJECTED) {
        thenable._onError = null;
        lib$rsvp$$internal$$reject(promise, thenable._result);
      } else {
        lib$rsvp$$internal$$subscribe(thenable, undefined, function(value) {
          if (thenable !== value) {
            lib$rsvp$$internal$$resolve(promise, value);
          } else {
            lib$rsvp$$internal$$fulfill(promise, value);
          }
        }, function(reason) {
          lib$rsvp$$internal$$reject(promise, reason);
        });
      }
    }

    function lib$rsvp$$internal$$handleMaybeThenable(promise, maybeThenable) {
      if (maybeThenable.constructor === promise.constructor) {
        lib$rsvp$$internal$$handleOwnThenable(promise, maybeThenable);
      } else {
        var then = lib$rsvp$$internal$$getThen(maybeThenable);

        if (then === lib$rsvp$$internal$$GET_THEN_ERROR) {
          lib$rsvp$$internal$$reject(promise, lib$rsvp$$internal$$GET_THEN_ERROR.error);
        } else if (then === undefined) {
          lib$rsvp$$internal$$fulfill(promise, maybeThenable);
        } else if (lib$rsvp$utils$$isFunction(then)) {
          lib$rsvp$$internal$$handleForeignThenable(promise, maybeThenable, then);
        } else {
          lib$rsvp$$internal$$fulfill(promise, maybeThenable);
        }
      }
    }

    function lib$rsvp$$internal$$resolve(promise, value) {
      if (promise === value) {
        lib$rsvp$$internal$$fulfill(promise, value);
      } else if (lib$rsvp$utils$$objectOrFunction(value)) {
        lib$rsvp$$internal$$handleMaybeThenable(promise, value);
      } else {
        lib$rsvp$$internal$$fulfill(promise, value);
      }
    }

    function lib$rsvp$$internal$$publishRejection(promise) {
      if (promise._onError) {
        promise._onError(promise._result);
      }

      lib$rsvp$$internal$$publish(promise);
    }

    function lib$rsvp$$internal$$fulfill(promise, value) {
      if (promise._state !== lib$rsvp$$internal$$PENDING) { return; }

      promise._result = value;
      promise._state = lib$rsvp$$internal$$FULFILLED;

      if (promise._subscribers.length === 0) {
        if (lib$rsvp$config$$config.instrument) {
          lib$rsvp$instrument$$default('fulfilled', promise);
        }
      } else {
        lib$rsvp$config$$config.async(lib$rsvp$$internal$$publish, promise);
      }
    }

    function lib$rsvp$$internal$$reject(promise, reason) {
      if (promise._state !== lib$rsvp$$internal$$PENDING) { return; }
      promise._state = lib$rsvp$$internal$$REJECTED;
      promise._result = reason;
      lib$rsvp$config$$config.async(lib$rsvp$$internal$$publishRejection, promise);
    }

    function lib$rsvp$$internal$$subscribe(parent, child, onFulfillment, onRejection) {
      var subscribers = parent._subscribers;
      var length = subscribers.length;

      parent._onError = null;

      subscribers[length] = child;
      subscribers[length + lib$rsvp$$internal$$FULFILLED] = onFulfillment;
      subscribers[length + lib$rsvp$$internal$$REJECTED]  = onRejection;

      if (length === 0 && parent._state) {
        lib$rsvp$config$$config.async(lib$rsvp$$internal$$publish, parent);
      }
    }

    function lib$rsvp$$internal$$publish(promise) {
      var subscribers = promise._subscribers;
      var settled = promise._state;

      if (lib$rsvp$config$$config.instrument) {
        lib$rsvp$instrument$$default(settled === lib$rsvp$$internal$$FULFILLED ? 'fulfilled' : 'rejected', promise);
      }

      if (subscribers.length === 0) { return; }

      var child, callback, detail = promise._result;

      for (var i = 0; i < subscribers.length; i += 3) {
        child = subscribers[i];
        callback = subscribers[i + settled];

        if (child) {
          lib$rsvp$$internal$$invokeCallback(settled, child, callback, detail);
        } else {
          callback(detail);
        }
      }

      promise._subscribers.length = 0;
    }

    function lib$rsvp$$internal$$ErrorObject() {
      this.error = null;
    }

    var lib$rsvp$$internal$$TRY_CATCH_ERROR = new lib$rsvp$$internal$$ErrorObject();

    function lib$rsvp$$internal$$tryCatch(callback, detail) {
      try {
        return callback(detail);
      } catch(e) {
        lib$rsvp$$internal$$TRY_CATCH_ERROR.error = e;
        return lib$rsvp$$internal$$TRY_CATCH_ERROR;
      }
    }

    function lib$rsvp$$internal$$invokeCallback(settled, promise, callback, detail) {
      var hasCallback = lib$rsvp$utils$$isFunction(callback),
          value, error, succeeded, failed;

      if (hasCallback) {
        value = lib$rsvp$$internal$$tryCatch(callback, detail);

        if (value === lib$rsvp$$internal$$TRY_CATCH_ERROR) {
          failed = true;
          error = value.error;
          value = null;
        } else {
          succeeded = true;
        }

        if (promise === value) {
          lib$rsvp$$internal$$reject(promise, lib$rsvp$$internal$$withOwnPromise());
          return;
        }

      } else {
        value = detail;
        succeeded = true;
      }

      if (promise._state !== lib$rsvp$$internal$$PENDING) {
        // noop
      } else if (hasCallback && succeeded) {
        lib$rsvp$$internal$$resolve(promise, value);
      } else if (failed) {
        lib$rsvp$$internal$$reject(promise, error);
      } else if (settled === lib$rsvp$$internal$$FULFILLED) {
        lib$rsvp$$internal$$fulfill(promise, value);
      } else if (settled === lib$rsvp$$internal$$REJECTED) {
        lib$rsvp$$internal$$reject(promise, value);
      }
    }

    function lib$rsvp$$internal$$initializePromise(promise, resolver) {
      var resolved = false;
      try {
        resolver(function resolvePromise(value){
          if (resolved) { return; }
          resolved = true;
          lib$rsvp$$internal$$resolve(promise, value);
        }, function rejectPromise(reason) {
          if (resolved) { return; }
          resolved = true;
          lib$rsvp$$internal$$reject(promise, reason);
        });
      } catch(e) {
        lib$rsvp$$internal$$reject(promise, e);
      }
    }

    function lib$rsvp$enumerator$$makeSettledResult(state, position, value) {
      if (state === lib$rsvp$$internal$$FULFILLED) {
        return {
          state: 'fulfilled',
          value: value
        };
      } else {
         return {
          state: 'rejected',
          reason: value
        };
      }
    }

    function lib$rsvp$enumerator$$Enumerator(Constructor, input, abortOnReject, label) {
      var enumerator = this;

      enumerator._instanceConstructor = Constructor;
      enumerator.promise = new Constructor(lib$rsvp$$internal$$noop, label);
      enumerator._abortOnReject = abortOnReject;

      if (enumerator._validateInput(input)) {
        enumerator._input     = input;
        enumerator.length     = input.length;
        enumerator._remaining = input.length;

        enumerator._init();

        if (enumerator.length === 0) {
          lib$rsvp$$internal$$fulfill(enumerator.promise, enumerator._result);
        } else {
          enumerator.length = enumerator.length || 0;
          enumerator._enumerate();
          if (enumerator._remaining === 0) {
            lib$rsvp$$internal$$fulfill(enumerator.promise, enumerator._result);
          }
        }
      } else {
        lib$rsvp$$internal$$reject(enumerator.promise, enumerator._validationError());
      }
    }

    var lib$rsvp$enumerator$$default = lib$rsvp$enumerator$$Enumerator;

    lib$rsvp$enumerator$$Enumerator.prototype._validateInput = function(input) {
      return lib$rsvp$utils$$isArray(input);
    };

    lib$rsvp$enumerator$$Enumerator.prototype._validationError = function() {
      return new Error('Array Methods must be provided an Array');
    };

    lib$rsvp$enumerator$$Enumerator.prototype._init = function() {
      this._result = new Array(this.length);
    };

    lib$rsvp$enumerator$$Enumerator.prototype._enumerate = function() {
      var enumerator = this;
      var length     = enumerator.length;
      var promise    = enumerator.promise;
      var input      = enumerator._input;

      for (var i = 0; promise._state === lib$rsvp$$internal$$PENDING && i < length; i++) {
        enumerator._eachEntry(input[i], i);
      }
    };

    lib$rsvp$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {
      var enumerator = this;
      var c = enumerator._instanceConstructor;
      if (lib$rsvp$utils$$isMaybeThenable(entry)) {
        if (entry.constructor === c && entry._state !== lib$rsvp$$internal$$PENDING) {
          entry._onError = null;
          enumerator._settledAt(entry._state, i, entry._result);
        } else {
          enumerator._willSettleAt(c.resolve(entry), i);
        }
      } else {
        enumerator._remaining--;
        enumerator._result[i] = enumerator._makeResult(lib$rsvp$$internal$$FULFILLED, i, entry);
      }
    };

    lib$rsvp$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {
      var enumerator = this;
      var promise = enumerator.promise;

      if (promise._state === lib$rsvp$$internal$$PENDING) {
        enumerator._remaining--;

        if (enumerator._abortOnReject && state === lib$rsvp$$internal$$REJECTED) {
          lib$rsvp$$internal$$reject(promise, value);
        } else {
          enumerator._result[i] = enumerator._makeResult(state, i, value);
        }
      }

      if (enumerator._remaining === 0) {
        lib$rsvp$$internal$$fulfill(promise, enumerator._result);
      }
    };

    lib$rsvp$enumerator$$Enumerator.prototype._makeResult = function(state, i, value) {
      return value;
    };

    lib$rsvp$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {
      var enumerator = this;

      lib$rsvp$$internal$$subscribe(promise, undefined, function(value) {
        enumerator._settledAt(lib$rsvp$$internal$$FULFILLED, i, value);
      }, function(reason) {
        enumerator._settledAt(lib$rsvp$$internal$$REJECTED, i, reason);
      });
    };
    function lib$rsvp$promise$all$$all(entries, label) {
      return new lib$rsvp$enumerator$$default(this, entries, true /* abort on reject */, label).promise;
    }
    var lib$rsvp$promise$all$$default = lib$rsvp$promise$all$$all;
    function lib$rsvp$promise$race$$race(entries, label) {
      /*jshint validthis:true */
      var Constructor = this;

      var promise = new Constructor(lib$rsvp$$internal$$noop, label);

      if (!lib$rsvp$utils$$isArray(entries)) {
        lib$rsvp$$internal$$reject(promise, new TypeError('You must pass an array to race.'));
        return promise;
      }

      var length = entries.length;

      function onFulfillment(value) {
        lib$rsvp$$internal$$resolve(promise, value);
      }

      function onRejection(reason) {
        lib$rsvp$$internal$$reject(promise, reason);
      }

      for (var i = 0; promise._state === lib$rsvp$$internal$$PENDING && i < length; i++) {
        lib$rsvp$$internal$$subscribe(Constructor.resolve(entries[i]), undefined, onFulfillment, onRejection);
      }

      return promise;
    }
    var lib$rsvp$promise$race$$default = lib$rsvp$promise$race$$race;
    function lib$rsvp$promise$resolve$$resolve(object, label) {
      /*jshint validthis:true */
      var Constructor = this;

      if (object && typeof object === 'object' && object.constructor === Constructor) {
        return object;
      }

      var promise = new Constructor(lib$rsvp$$internal$$noop, label);
      lib$rsvp$$internal$$resolve(promise, object);
      return promise;
    }
    var lib$rsvp$promise$resolve$$default = lib$rsvp$promise$resolve$$resolve;
    function lib$rsvp$promise$reject$$reject(reason, label) {
      /*jshint validthis:true */
      var Constructor = this;
      var promise = new Constructor(lib$rsvp$$internal$$noop, label);
      lib$rsvp$$internal$$reject(promise, reason);
      return promise;
    }
    var lib$rsvp$promise$reject$$default = lib$rsvp$promise$reject$$reject;

    var lib$rsvp$promise$$guidKey = 'rsvp_' + lib$rsvp$utils$$now() + '-';
    var lib$rsvp$promise$$counter = 0;

    function lib$rsvp$promise$$needsResolver() {
      throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');
    }

    function lib$rsvp$promise$$needsNew() {
      throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");
    }

    function lib$rsvp$promise$$Promise(resolver, label) {
      var promise = this;

      promise._id = lib$rsvp$promise$$counter++;
      promise._label = label;
      promise._state = undefined;
      promise._result = undefined;
      promise._subscribers = [];

      if (lib$rsvp$config$$config.instrument) {
        lib$rsvp$instrument$$default('created', promise);
      }

      if (lib$rsvp$$internal$$noop !== resolver) {
        if (!lib$rsvp$utils$$isFunction(resolver)) {
          lib$rsvp$promise$$needsResolver();
        }

        if (!(promise instanceof lib$rsvp$promise$$Promise)) {
          lib$rsvp$promise$$needsNew();
        }

        lib$rsvp$$internal$$initializePromise(promise, resolver);
      }
    }

    var lib$rsvp$promise$$default = lib$rsvp$promise$$Promise;

    // deprecated
    lib$rsvp$promise$$Promise.cast = lib$rsvp$promise$resolve$$default;
    lib$rsvp$promise$$Promise.all = lib$rsvp$promise$all$$default;
    lib$rsvp$promise$$Promise.race = lib$rsvp$promise$race$$default;
    lib$rsvp$promise$$Promise.resolve = lib$rsvp$promise$resolve$$default;
    lib$rsvp$promise$$Promise.reject = lib$rsvp$promise$reject$$default;

    lib$rsvp$promise$$Promise.prototype = {
      constructor: lib$rsvp$promise$$Promise,

      _guidKey: lib$rsvp$promise$$guidKey,

      _onError: function (reason) {
        var promise = this;
        lib$rsvp$config$$config.after(function() {
          if (promise._onError) {
            lib$rsvp$config$$config['trigger']('error', reason, promise._label);
          }
        });
      },

    /**
      The primary way of interacting with a promise is through its `then` method,
      which registers callbacks to receive either a promise's eventual value or the
      reason why the promise cannot be fulfilled.

      ```js
      findUser().then(function(user){
        // user is available
      }, function(reason){
        // user is unavailable, and you are given the reason why
      });
      ```

      Chaining
      --------

      The return value of `then` is itself a promise.  This second, 'downstream'
      promise is resolved with the return value of the first promise's fulfillment
      or rejection handler, or rejected if the handler throws an exception.

      ```js
      findUser().then(function (user) {
        return user.name;
      }, function (reason) {
        return 'default name';
      }).then(function (userName) {
        // If `findUser` fulfilled, `userName` will be the user's name, otherwise it
        // will be `'default name'`
      });

      findUser().then(function (user) {
        throw new Error('Found user, but still unhappy');
      }, function (reason) {
        throw new Error('`findUser` rejected and we're unhappy');
      }).then(function (value) {
        // never reached
      }, function (reason) {
        // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.
        // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.
      });
      ```
      If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.

      ```js
      findUser().then(function (user) {
        throw new PedagogicalException('Upstream error');
      }).then(function (value) {
        // never reached
      }).then(function (value) {
        // never reached
      }, function (reason) {
        // The `PedgagocialException` is propagated all the way down to here
      });
      ```

      Assimilation
      ------------

      Sometimes the value you want to propagate to a downstream promise can only be
      retrieved asynchronously. This can be achieved by returning a promise in the
      fulfillment or rejection handler. The downstream promise will then be pending
      until the returned promise is settled. This is called *assimilation*.

      ```js
      findUser().then(function (user) {
        return findCommentsByAuthor(user);
      }).then(function (comments) {
        // The user's comments are now available
      });
      ```

      If the assimliated promise rejects, then the downstream promise will also reject.

      ```js
      findUser().then(function (user) {
        return findCommentsByAuthor(user);
      }).then(function (comments) {
        // If `findCommentsByAuthor` fulfills, we'll have the value here
      }, function (reason) {
        // If `findCommentsByAuthor` rejects, we'll have the reason here
      });
      ```

      Simple Example
      --------------

      Synchronous Example

      ```javascript
      var result;

      try {
        result = findResult();
        // success
      } catch(reason) {
        // failure
      }
      ```

      Errback Example

      ```js
      findResult(function(result, err){
        if (err) {
          // failure
        } else {
          // success
        }
      });
      ```

      Promise Example;

      ```javascript
      findResult().then(function(result){
        // success
      }, function(reason){
        // failure
      });
      ```

      Advanced Example
      --------------

      Synchronous Example

      ```javascript
      var author, books;

      try {
        author = findAuthor();
        books  = findBooksByAuthor(author);
        // success
      } catch(reason) {
        // failure
      }
      ```

      Errback Example

      ```js

      function foundBooks(books) {

      }

      function failure(reason) {

      }

      findAuthor(function(author, err){
        if (err) {
          failure(err);
          // failure
        } else {
          try {
            findBoooksByAuthor(author, function(books, err) {
              if (err) {
                failure(err);
              } else {
                try {
                  foundBooks(books);
                } catch(reason) {
                  failure(reason);
                }
              }
            });
          } catch(error) {
            failure(err);
          }
          // success
        }
      });
      ```

      Promise Example;

      ```javascript
      findAuthor().
        then(findBooksByAuthor).
        then(function(books){
          // found books
      }).catch(function(reason){
        // something went wrong
      });
      ```

      @method then
      @param {Function} onFulfillment
      @param {Function} onRejection
      @param {String} label optional string for labeling the promise.
      Useful for tooling.
      @return {Promise}
    */
      then: function(onFulfillment, onRejection, label) {
        var parent = this;
        var state = parent._state;

        if (state === lib$rsvp$$internal$$FULFILLED && !onFulfillment || state === lib$rsvp$$internal$$REJECTED && !onRejection) {
          if (lib$rsvp$config$$config.instrument) {
            lib$rsvp$instrument$$default('chained', parent, parent);
          }
          return parent;
        }

        parent._onError = null;

        var child = new parent.constructor(lib$rsvp$$internal$$noop, label);
        var result = parent._result;

        if (lib$rsvp$config$$config.instrument) {
          lib$rsvp$instrument$$default('chained', parent, child);
        }

        if (state) {
          var callback = arguments[state - 1];
          lib$rsvp$config$$config.async(function(){
            lib$rsvp$$internal$$invokeCallback(state, child, callback, result);
          });
        } else {
          lib$rsvp$$internal$$subscribe(parent, child, onFulfillment, onRejection);
        }

        return child;
      },

    /**
      `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same
      as the catch block of a try/catch statement.

      ```js
      function findAuthor(){
        throw new Error('couldn't find that author');
      }

      // synchronous
      try {
        findAuthor();
      } catch(reason) {
        // something went wrong
      }

      // async with promises
      findAuthor().catch(function(reason){
        // something went wrong
      });
      ```

      @method catch
      @param {Function} onRejection
      @param {String} label optional string for labeling the promise.
      Useful for tooling.
      @return {Promise}
    */
      'catch': function(onRejection, label) {
        return this.then(undefined, onRejection, label);
      },

    /**
      `finally` will be invoked regardless of the promise's fate just as native
      try/catch/finally behaves

      Synchronous example:

      ```js
      findAuthor() {
        if (Math.random() > 0.5) {
          throw new Error();
        }
        return new Author();
      }

      try {
        return findAuthor(); // succeed or fail
      } catch(error) {
        return findOtherAuther();
      } finally {
        // always runs
        // doesn't affect the return value
      }
      ```

      Asynchronous example:

      ```js
      findAuthor().catch(function(reason){
        return findOtherAuther();
      }).finally(function(){
        // author was either found, or not
      });
      ```

      @method finally
      @param {Function} callback
      @param {String} label optional string for labeling the promise.
      Useful for tooling.
      @return {Promise}
    */
      'finally': function(callback, label) {
        var promise = this;
        var constructor = promise.constructor;

        return promise.then(function(value) {
          return constructor.resolve(callback()).then(function(){
            return value;
          });
        }, function(reason) {
          return constructor.resolve(callback()).then(function(){
            throw reason;
          });
        }, label);
      }
    };

    function lib$rsvp$all$settled$$AllSettled(Constructor, entries, label) {
      this._superConstructor(Constructor, entries, false /* don't abort on reject */, label);
    }

    lib$rsvp$all$settled$$AllSettled.prototype = lib$rsvp$utils$$o_create(lib$rsvp$enumerator$$default.prototype);
    lib$rsvp$all$settled$$AllSettled.prototype._superConstructor = lib$rsvp$enumerator$$default;
    lib$rsvp$all$settled$$AllSettled.prototype._makeResult = lib$rsvp$enumerator$$makeSettledResult;
    lib$rsvp$all$settled$$AllSettled.prototype._validationError = function() {
      return new Error('allSettled must be called with an array');
    };

    function lib$rsvp$all$settled$$allSettled(entries, label) {
      return new lib$rsvp$all$settled$$AllSettled(lib$rsvp$promise$$default, entries, label).promise;
    }
    var lib$rsvp$all$settled$$default = lib$rsvp$all$settled$$allSettled;
    function lib$rsvp$all$$all(array, label) {
      return lib$rsvp$promise$$default.all(array, label);
    }
    var lib$rsvp$all$$default = lib$rsvp$all$$all;
    var lib$rsvp$asap$$len = 0;
    var lib$rsvp$asap$$toString = {}.toString;
    var lib$rsvp$asap$$vertxNext;
    function lib$rsvp$asap$$asap(callback, arg) {
      lib$rsvp$asap$$queue[lib$rsvp$asap$$len] = callback;
      lib$rsvp$asap$$queue[lib$rsvp$asap$$len + 1] = arg;
      lib$rsvp$asap$$len += 2;
      if (lib$rsvp$asap$$len === 2) {
        // If len is 1, that means that we need to schedule an async flush.
        // If additional callbacks are queued before the queue is flushed, they
        // will be processed by this flush that we are scheduling.
        lib$rsvp$asap$$scheduleFlush();
      }
    }

    var lib$rsvp$asap$$default = lib$rsvp$asap$$asap;

    var lib$rsvp$asap$$browserWindow = (typeof window !== 'undefined') ? window : undefined;
    var lib$rsvp$asap$$browserGlobal = lib$rsvp$asap$$browserWindow || {};
    var lib$rsvp$asap$$BrowserMutationObserver = lib$rsvp$asap$$browserGlobal.MutationObserver || lib$rsvp$asap$$browserGlobal.WebKitMutationObserver;
    var lib$rsvp$asap$$isNode = typeof self === 'undefined' &&
      typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';

    // test for web worker but not in IE10
    var lib$rsvp$asap$$isWorker = typeof Uint8ClampedArray !== 'undefined' &&
      typeof importScripts !== 'undefined' &&
      typeof MessageChannel !== 'undefined';

    // node
    function lib$rsvp$asap$$useNextTick() {
      var nextTick = process.nextTick;
      // node version 0.10.x displays a deprecation warning when nextTick is used recursively
      // setImmediate should be used instead instead
      var version = process.versions.node.match(/^(?:(\d+)\.)?(?:(\d+)\.)?(\*|\d+)$/);
      if (Array.isArray(version) && version[1] === '0' && version[2] === '10') {
        nextTick = setImmediate;
      }
      return function() {
        nextTick(lib$rsvp$asap$$flush);
      };
    }

    // vertx
    function lib$rsvp$asap$$useVertxTimer() {
      return function() {
        lib$rsvp$asap$$vertxNext(lib$rsvp$asap$$flush);
      };
    }

    function lib$rsvp$asap$$useMutationObserver() {
      var iterations = 0;
      var observer = new lib$rsvp$asap$$BrowserMutationObserver(lib$rsvp$asap$$flush);
      var node = document.createTextNode('');
      observer.observe(node, { characterData: true });

      return function() {
        node.data = (iterations = ++iterations % 2);
      };
    }

    // web worker
    function lib$rsvp$asap$$useMessageChannel() {
      var channel = new MessageChannel();
      channel.port1.onmessage = lib$rsvp$asap$$flush;
      return function () {
        channel.port2.postMessage(0);
      };
    }

    function lib$rsvp$asap$$useSetTimeout() {
      return function() {
        setTimeout(lib$rsvp$asap$$flush, 1);
      };
    }

    var lib$rsvp$asap$$queue = new Array(1000);
    function lib$rsvp$asap$$flush() {
      for (var i = 0; i < lib$rsvp$asap$$len; i+=2) {
        var callback = lib$rsvp$asap$$queue[i];
        var arg = lib$rsvp$asap$$queue[i+1];

        callback(arg);

        lib$rsvp$asap$$queue[i] = undefined;
        lib$rsvp$asap$$queue[i+1] = undefined;
      }

      lib$rsvp$asap$$len = 0;
    }

    function lib$rsvp$asap$$attemptVertex() {
      try {
        var r = require;
        var vertx = r('vertx');
        lib$rsvp$asap$$vertxNext = vertx.runOnLoop || vertx.runOnContext;
        return lib$rsvp$asap$$useVertxTimer();
      } catch(e) {
        return lib$rsvp$asap$$useSetTimeout();
      }
    }

    var lib$rsvp$asap$$scheduleFlush;
    // Decide what async method to use to triggering processing of queued callbacks:
    if (lib$rsvp$asap$$isNode) {
      lib$rsvp$asap$$scheduleFlush = lib$rsvp$asap$$useNextTick();
    } else if (lib$rsvp$asap$$BrowserMutationObserver) {
      lib$rsvp$asap$$scheduleFlush = lib$rsvp$asap$$useMutationObserver();
    } else if (lib$rsvp$asap$$isWorker) {
      lib$rsvp$asap$$scheduleFlush = lib$rsvp$asap$$useMessageChannel();
    } else if (lib$rsvp$asap$$browserWindow === undefined && typeof require === 'function') {
      lib$rsvp$asap$$scheduleFlush = lib$rsvp$asap$$attemptVertex();
    } else {
      lib$rsvp$asap$$scheduleFlush = lib$rsvp$asap$$useSetTimeout();
    }
    function lib$rsvp$defer$$defer(label) {
      var deferred = {};

      deferred['promise'] = new lib$rsvp$promise$$default(function(resolve, reject) {
        deferred['resolve'] = resolve;
        deferred['reject'] = reject;
      }, label);

      return deferred;
    }
    var lib$rsvp$defer$$default = lib$rsvp$defer$$defer;
    function lib$rsvp$filter$$filter(promises, filterFn, label) {
      return lib$rsvp$promise$$default.all(promises, label).then(function(values) {
        if (!lib$rsvp$utils$$isFunction(filterFn)) {
          throw new TypeError("You must pass a function as filter's second argument.");
        }

        var length = values.length;
        var filtered = new Array(length);

        for (var i = 0; i < length; i++) {
          filtered[i] = filterFn(values[i]);
        }

        return lib$rsvp$promise$$default.all(filtered, label).then(function(filtered) {
          var results = new Array(length);
          var newLength = 0;

          for (var i = 0; i < length; i++) {
            if (filtered[i]) {
              results[newLength] = values[i];
              newLength++;
            }
          }

          results.length = newLength;

          return results;
        });
      });
    }
    var lib$rsvp$filter$$default = lib$rsvp$filter$$filter;

    function lib$rsvp$promise$hash$$PromiseHash(Constructor, object, label) {
      this._superConstructor(Constructor, object, true, label);
    }

    var lib$rsvp$promise$hash$$default = lib$rsvp$promise$hash$$PromiseHash;

    lib$rsvp$promise$hash$$PromiseHash.prototype = lib$rsvp$utils$$o_create(lib$rsvp$enumerator$$default.prototype);
    lib$rsvp$promise$hash$$PromiseHash.prototype._superConstructor = lib$rsvp$enumerator$$default;
    lib$rsvp$promise$hash$$PromiseHash.prototype._init = function() {
      this._result = {};
    };

    lib$rsvp$promise$hash$$PromiseHash.prototype._validateInput = function(input) {
      return input && typeof input === 'object';
    };

    lib$rsvp$promise$hash$$PromiseHash.prototype._validationError = function() {
      return new Error('Promise.hash must be called with an object');
    };

    lib$rsvp$promise$hash$$PromiseHash.prototype._enumerate = function() {
      var enumerator = this;
      var promise    = enumerator.promise;
      var input      = enumerator._input;
      var results    = [];

      for (var key in input) {
        if (promise._state === lib$rsvp$$internal$$PENDING && Object.prototype.hasOwnProperty.call(input, key)) {
          results.push({
            position: key,
            entry: input[key]
          });
        }
      }

      var length = results.length;
      enumerator._remaining = length;
      var result;

      for (var i = 0; promise._state === lib$rsvp$$internal$$PENDING && i < length; i++) {
        result = results[i];
        enumerator._eachEntry(result.entry, result.position);
      }
    };

    function lib$rsvp$hash$settled$$HashSettled(Constructor, object, label) {
      this._superConstructor(Constructor, object, false, label);
    }

    lib$rsvp$hash$settled$$HashSettled.prototype = lib$rsvp$utils$$o_create(lib$rsvp$promise$hash$$default.prototype);
    lib$rsvp$hash$settled$$HashSettled.prototype._superConstructor = lib$rsvp$enumerator$$default;
    lib$rsvp$hash$settled$$HashSettled.prototype._makeResult = lib$rsvp$enumerator$$makeSettledResult;

    lib$rsvp$hash$settled$$HashSettled.prototype._validationError = function() {
      return new Error('hashSettled must be called with an object');
    };

    function lib$rsvp$hash$settled$$hashSettled(object, label) {
      return new lib$rsvp$hash$settled$$HashSettled(lib$rsvp$promise$$default, object, label).promise;
    }
    var lib$rsvp$hash$settled$$default = lib$rsvp$hash$settled$$hashSettled;
    function lib$rsvp$hash$$hash(object, label) {
      return new lib$rsvp$promise$hash$$default(lib$rsvp$promise$$default, object, label).promise;
    }
    var lib$rsvp$hash$$default = lib$rsvp$hash$$hash;
    function lib$rsvp$map$$map(promises, mapFn, label) {
      return lib$rsvp$promise$$default.all(promises, label).then(function(values) {
        if (!lib$rsvp$utils$$isFunction(mapFn)) {
          throw new TypeError("You must pass a function as map's second argument.");
        }

        var length = values.length;
        var results = new Array(length);

        for (var i = 0; i < length; i++) {
          results[i] = mapFn(values[i]);
        }

        return lib$rsvp$promise$$default.all(results, label);
      });
    }
    var lib$rsvp$map$$default = lib$rsvp$map$$map;

    function lib$rsvp$node$$Result() {
      this.value = undefined;
    }

    var lib$rsvp$node$$ERROR = new lib$rsvp$node$$Result();
    var lib$rsvp$node$$GET_THEN_ERROR = new lib$rsvp$node$$Result();

    function lib$rsvp$node$$getThen(obj) {
      try {
       return obj.then;
      } catch(error) {
        lib$rsvp$node$$ERROR.value= error;
        return lib$rsvp$node$$ERROR;
      }
    }


    function lib$rsvp$node$$tryApply(f, s, a) {
      try {
        f.apply(s, a);
      } catch(error) {
        lib$rsvp$node$$ERROR.value = error;
        return lib$rsvp$node$$ERROR;
      }
    }

    function lib$rsvp$node$$makeObject(_, argumentNames) {
      var obj = {};
      var name;
      var i;
      var length = _.length;
      var args = new Array(length);

      for (var x = 0; x < length; x++) {
        args[x] = _[x];
      }

      for (i = 0; i < argumentNames.length; i++) {
        name = argumentNames[i];
        obj[name] = args[i + 1];
      }

      return obj;
    }

    function lib$rsvp$node$$arrayResult(_) {
      var length = _.length;
      var args = new Array(length - 1);

      for (var i = 1; i < length; i++) {
        args[i - 1] = _[i];
      }

      return args;
    }

    function lib$rsvp$node$$wrapThenable(then, promise) {
      return {
        then: function(onFulFillment, onRejection) {
          return then.call(promise, onFulFillment, onRejection);
        }
      };
    }

    function lib$rsvp$node$$denodeify(nodeFunc, options) {
      var fn = function() {
        var self = this;
        var l = arguments.length;
        var args = new Array(l + 1);
        var arg;
        var promiseInput = false;

        for (var i = 0; i < l; ++i) {
          arg = arguments[i];

          if (!promiseInput) {
            // TODO: clean this up
            promiseInput = lib$rsvp$node$$needsPromiseInput(arg);
            if (promiseInput === lib$rsvp$node$$GET_THEN_ERROR) {
              var p = new lib$rsvp$promise$$default(lib$rsvp$$internal$$noop);
              lib$rsvp$$internal$$reject(p, lib$rsvp$node$$GET_THEN_ERROR.value);
              return p;
            } else if (promiseInput && promiseInput !== true) {
              arg = lib$rsvp$node$$wrapThenable(promiseInput, arg);
            }
          }
          args[i] = arg;
        }

        var promise = new lib$rsvp$promise$$default(lib$rsvp$$internal$$noop);

        args[l] = function(err, val) {
          if (err)
            lib$rsvp$$internal$$reject(promise, err);
          else if (options === undefined)
            lib$rsvp$$internal$$resolve(promise, val);
          else if (options === true)
            lib$rsvp$$internal$$resolve(promise, lib$rsvp$node$$arrayResult(arguments));
          else if (lib$rsvp$utils$$isArray(options))
            lib$rsvp$$internal$$resolve(promise, lib$rsvp$node$$makeObject(arguments, options));
          else
            lib$rsvp$$internal$$resolve(promise, val);
        };

        if (promiseInput) {
          return lib$rsvp$node$$handlePromiseInput(promise, args, nodeFunc, self);
        } else {
          return lib$rsvp$node$$handleValueInput(promise, args, nodeFunc, self);
        }
      };

      fn.__proto__ = nodeFunc;

      return fn;
    }

    var lib$rsvp$node$$default = lib$rsvp$node$$denodeify;

    function lib$rsvp$node$$handleValueInput(promise, args, nodeFunc, self) {
      var result = lib$rsvp$node$$tryApply(nodeFunc, self, args);
      if (result === lib$rsvp$node$$ERROR) {
        lib$rsvp$$internal$$reject(promise, result.value);
      }
      return promise;
    }

    function lib$rsvp$node$$handlePromiseInput(promise, args, nodeFunc, self){
      return lib$rsvp$promise$$default.all(args).then(function(args){
        var result = lib$rsvp$node$$tryApply(nodeFunc, self, args);
        if (result === lib$rsvp$node$$ERROR) {
          lib$rsvp$$internal$$reject(promise, result.value);
        }
        return promise;
      });
    }

    function lib$rsvp$node$$needsPromiseInput(arg) {
      if (arg && typeof arg === 'object') {
        if (arg.constructor === lib$rsvp$promise$$default) {
          return true;
        } else {
          return lib$rsvp$node$$getThen(arg);
        }
      } else {
        return false;
      }
    }
    var lib$rsvp$platform$$platform;

    /* global self */
    if (typeof self === 'object') {
      lib$rsvp$platform$$platform = self;

    /* global global */
    } else if (typeof global === 'object') {
      lib$rsvp$platform$$platform = global;
    } else {
      throw new Error('no global: `self` or `global` found');
    }

    var lib$rsvp$platform$$default = lib$rsvp$platform$$platform;
    function lib$rsvp$race$$race(array, label) {
      return lib$rsvp$promise$$default.race(array, label);
    }
    var lib$rsvp$race$$default = lib$rsvp$race$$race;
    function lib$rsvp$reject$$reject(reason, label) {
      return lib$rsvp$promise$$default.reject(reason, label);
    }
    var lib$rsvp$reject$$default = lib$rsvp$reject$$reject;
    function lib$rsvp$resolve$$resolve(value, label) {
      return lib$rsvp$promise$$default.resolve(value, label);
    }
    var lib$rsvp$resolve$$default = lib$rsvp$resolve$$resolve;
    function lib$rsvp$rethrow$$rethrow(reason) {
      setTimeout(function() {
        throw reason;
      });
      throw reason;
    }
    var lib$rsvp$rethrow$$default = lib$rsvp$rethrow$$rethrow;

    // defaults
    lib$rsvp$config$$config.async = lib$rsvp$asap$$default;
    lib$rsvp$config$$config.after = function(cb) {
      setTimeout(cb, 0);
    };
    var lib$rsvp$$cast = lib$rsvp$resolve$$default;
    function lib$rsvp$$async(callback, arg) {
      lib$rsvp$config$$config.async(callback, arg);
    }

    function lib$rsvp$$on() {
      lib$rsvp$config$$config['on'].apply(lib$rsvp$config$$config, arguments);
    }

    function lib$rsvp$$off() {
      lib$rsvp$config$$config['off'].apply(lib$rsvp$config$$config, arguments);
    }

    // Set up instrumentation through `window.__PROMISE_INTRUMENTATION__`
    if (typeof window !== 'undefined' && typeof window['__PROMISE_INSTRUMENTATION__'] === 'object') {
      var lib$rsvp$$callbacks = window['__PROMISE_INSTRUMENTATION__'];
      lib$rsvp$config$$configure('instrument', true);
      for (var lib$rsvp$$eventName in lib$rsvp$$callbacks) {
        if (lib$rsvp$$callbacks.hasOwnProperty(lib$rsvp$$eventName)) {
          lib$rsvp$$on(lib$rsvp$$eventName, lib$rsvp$$callbacks[lib$rsvp$$eventName]);
        }
      }
    }

    var lib$rsvp$umd$$RSVP = {
      'race': lib$rsvp$race$$default,
      'Promise': lib$rsvp$promise$$default,
      'allSettled': lib$rsvp$all$settled$$default,
      'hash': lib$rsvp$hash$$default,
      'hashSettled': lib$rsvp$hash$settled$$default,
      'denodeify': lib$rsvp$node$$default,
      'on': lib$rsvp$$on,
      'off': lib$rsvp$$off,
      'map': lib$rsvp$map$$default,
      'filter': lib$rsvp$filter$$default,
      'resolve': lib$rsvp$resolve$$default,
      'reject': lib$rsvp$reject$$default,
      'all': lib$rsvp$all$$default,
      'rethrow': lib$rsvp$rethrow$$default,
      'defer': lib$rsvp$defer$$default,
      'EventTarget': lib$rsvp$events$$default,
      'configure': lib$rsvp$config$$configure,
      'async': lib$rsvp$$async
    };

    /* global define:true module:true window: true */
    if (typeof define === 'function' && define['amd']) {
      define(function() { return lib$rsvp$umd$$RSVP; });
    } else if (typeof module !== 'undefined' && module['exports']) {
      module['exports'] = lib$rsvp$umd$$RSVP;
    } else if (typeof lib$rsvp$platform$$default !== 'undefined') {
      lib$rsvp$platform$$default['RSVP'] = lib$rsvp$umd$$RSVP;
    }
}).call(this);


'use strict';

var EPUBJS = EPUBJS || {};
EPUBJS.VERSION = "0.2.7";

EPUBJS.plugins = EPUBJS.plugins || {};

EPUBJS.filePath = EPUBJS.filePath || "/epubjs/";

EPUBJS.Render = {};

(function(root) {

	var previousEpub = root.ePub || {};

	var ePub = root.ePub = function() {
		var bookPath, options;

		//-- var book = ePub("path/to/book.epub", { restore: true })
		if(typeof(arguments[0]) != 'undefined' &&
			typeof arguments[0] === 'string') {

			bookPath = arguments[0];

			if( arguments[1] && typeof arguments[1] === 'object' ) {
				options = arguments[1];
				options.bookPath = bookPath;
			} else {
				options = { 'bookPath' : bookPath };
			}

		}

		/*
		*   var book = ePub({ bookPath: "path/to/book.epub", restore: true });
		*
		*   - OR -
		*
		*   var book = ePub({ restore: true });
		*   book.open("path/to/book.epub");
		*/

		if( arguments[0] && typeof arguments[0] === 'object' ) {
			options = arguments[0];
		}


		return new EPUBJS.Book(options);
	};

	//exports to multiple environments
	if (typeof define === 'function' && define.amd)
	//AMD
	define(function(){ return ePub; });
	else if (typeof module != "undefined" && module.exports)
	//Node
	module.exports = ePub;

})(window);

EPUBJS.Book = function(options){

	var book = this;

	this.settings = EPUBJS.core.defaults(options || {}, {
		bookPath : undefined,
		bookKey : undefined,
		packageUrl : undefined,
		storage: false, //-- true (auto) or false (none) | override: 'ram', 'websqldatabase', 'indexeddb', 'filesystem'
		fromStorage : false,
		saved : false,
		online : true,
		contained : false,
		width : undefined,
		height: undefined,
		layoutOveride : undefined, // Default: { spread: 'reflowable', layout: 'auto', orientation: 'auto'}
		orientation : undefined,
		minSpreadWidth: 800, //-- overridden by spread: none (never) / both (always)
		gap: "auto", //-- "auto" or int
		version: 1,
		restore: false,
		reload : false,
		goto : false,
		styles : {},
		headTags : {},
		withCredentials: false,
		render_method: "Iframe"
	});

	this.settings.EPUBJSVERSION = EPUBJS.VERSION;

	this.spinePos = 0;
	this.stored = false;

	//-- All Book events for listening
	/*
		book:ready
		book:stored
		book:online
		book:offline
		book:pageChanged
		book:loadFailed
		book:loadChapterFailed
	*/

	//-- Adds Hook methods to the Book prototype
	//   Hooks will all return before triggering the callback.
	// EPUBJS.Hooks.mixin(this);
	//-- Get pre-registered hooks for events
	// this.getHooks("beforeChapterDisplay");

	this.online = this.settings.online || navigator.onLine;
	this.networkListeners();

	this.ready = {
		manifest: new RSVP.defer(),
		spine: new RSVP.defer(),
		metadata: new RSVP.defer(),
		cover: new RSVP.defer(),
		toc: new RSVP.defer(),
		pageList: new RSVP.defer()
	};

	this.readyPromises = [
		this.ready.manifest.promise,
		this.ready.spine.promise,
		this.ready.metadata.promise,
		this.ready.cover.promise,
		this.ready.toc.promise
	];

	this.pageList = [];
	this.pagination = new EPUBJS.Pagination();
	this.pageListReady = this.ready.pageList.promise;

	this.ready.all = RSVP.all(this.readyPromises);

	this.ready.all.then(this._ready.bind(this));

	// Queue for methods used before rendering
	this.isRendered = false;
	this._q = EPUBJS.core.queue(this);
	// Queue for rendering
	this._rendering = false;
	this._displayQ = EPUBJS.core.queue(this);
	// Queue for going to another location
	this._moving = false;
	this._gotoQ = EPUBJS.core.queue(this);

	/**
	* Creates a new renderer.
	* The renderer will handle displaying the content using the method provided in the settings
	*/
	this.renderer = new EPUBJS.Renderer(this.settings.render_method);
	//-- Set the width at which to switch from spreads to single pages
	this.renderer.setMinSpreadWidth(this.settings.minSpreadWidth);
	this.renderer.setGap(this.settings.gap);
	//-- Pass through the renderer events
	this.listenToRenderer(this.renderer);

	this.defer_opened = new RSVP.defer();
	this.opened = this.defer_opened.promise;

	this.store = false; //-- False if not using storage;

	//-- Determine storage method
	//-- Override options: none | ram | websqldatabase | indexeddb | filesystem
	if(this.settings.storage !== false){
		// this.storage = new fileStorage.storage(this.settings.storage);
		this.fromStorage(true);
	}

	// BookUrl is optional, but if present start loading process
	if(typeof this.settings.bookPath === 'string') {
		this.open(this.settings.bookPath, this.settings.reload);
	}

	window.addEventListener("beforeunload", this.unload.bind(this), false);

	//-- Listen for these promises:
	//-- book.opened.then()
	//-- book.rendered.then()
};

//-- Check bookUrl and start parsing book Assets or load them from storage
EPUBJS.Book.prototype.open = function(bookPath, forceReload){
	var book = this,
			epubpackage,
			opened = new RSVP.defer();

	this.settings.bookPath = bookPath;

	//-- Get a absolute URL from the book path
	this.bookUrl = this.urlFrom(bookPath);

	if(this.settings.contained || this.isContained(bookPath)){

		this.settings.contained = this.contained = true;

		this.bookUrl = '';

		epubpackage = this.unarchive(bookPath).
			then(function(){
				return book.loadPackage();
			});

	}	else {
		epubpackage = this.loadPackage();
	}

	if(this.settings.restore && !forceReload && localStorage){
		//-- Will load previous package json, or re-unpack if error
		epubpackage.then(function(packageXml) {
			var identifier = book.packageIdentifier(packageXml);
			var restored = book.restore(identifier);

			if(!restored) {
				book.unpack(packageXml);
			}
			opened.resolve();
			book.defer_opened.resolve();
		});

	}else{

		//-- Get package information from epub opf
		epubpackage.then(function(packageXml) {
			book.unpack(packageXml);
			opened.resolve();
			book.defer_opened.resolve();
		});
	}

	this._registerReplacements(this.renderer);

	return opened.promise;

};

EPUBJS.Book.prototype.loadPackage = function(_containerPath){
	var book = this,
			parse = new EPUBJS.Parser(),
			containerPath = _containerPath || "META-INF/container.xml",
			containerXml,
			packageXml;

	if(!this.settings.packageUrl) { //-- provide the packageUrl to skip this step
		packageXml = book.loadXml(book.bookUrl + containerPath).
			then(function(containerXml){
				return parse.container(containerXml); // Container has path to content
			}).
			then(function(paths){
				book.settings.contentsPath = book.bookUrl + paths.basePath;
				book.settings.packageUrl = book.bookUrl + paths.packagePath;
				book.settings.encoding = paths.encoding;
				return book.loadXml(book.settings.packageUrl); // Containes manifest, spine and metadata
			});
	} else {
		packageXml = book.loadXml(book.settings.packageUrl);
	}

	packageXml.catch(function(error) {
		// handle errors in either of the two requests
		console.error("Could not load book at: "+ containerPath);
		book.trigger("book:loadFailed", containerPath);
	});
	return packageXml;
};

EPUBJS.Book.prototype.packageIdentifier = function(packageXml){
	var book = this,
			parse = new EPUBJS.Parser();

	return parse.identifier(packageXml);
};

EPUBJS.Book.prototype.unpack = function(packageXml){
	var book = this,
			parse = new EPUBJS.Parser();

	book.contents = parse.packageContents(packageXml, book.settings.contentsPath); // Extract info from contents

	book.manifest = book.contents.manifest;
	book.spine = book.contents.spine;
	book.spineIndexByURL = book.contents.spineIndexByURL;
	book.metadata = book.contents.metadata;
	if(!book.settings.bookKey) {
		book.settings.bookKey = book.generateBookKey(book.metadata.identifier);
	}

	//-- Set Globbal Layout setting based on metadata
	book.globalLayoutProperties = book.parseLayoutProperties(book.metadata);

	if(book.contents.coverPath) {
		book.cover = book.contents.cover = book.settings.contentsPath + book.contents.coverPath;
	}

	book.spineNodeIndex = book.contents.spineNodeIndex;

	book.ready.manifest.resolve(book.contents.manifest);
	book.ready.spine.resolve(book.contents.spine);
	book.ready.metadata.resolve(book.contents.metadata);
	book.ready.cover.resolve(book.contents.cover);

	book.locations = new EPUBJS.Locations(book.spine);

	//-- Load the TOC, optional; either the EPUB3 XHTML Navigation file or the EPUB2 NCX file
	if(book.contents.navPath) {
		book.settings.navUrl = book.settings.contentsPath + book.contents.navPath;

		book.loadXml(book.settings.navUrl).
			then(function(navHtml){
				return parse.nav(navHtml, book.spineIndexByURL, book.spine); // Grab Table of Contents
			}).then(function(toc){
				book.toc = book.contents.toc = toc;
				book.ready.toc.resolve(book.contents.toc);
			}, function(error) {
				book.ready.toc.resolve(false);
			});

		// Load the optional pageList
		book.loadXml(book.settings.navUrl).
			then(function(navHtml){
				return parse.pageList(navHtml, book.spineIndexByURL, book.spine);
			}).then(function(pageList){
				var epubcfi = new EPUBJS.EpubCFI();
				var wait = 0; // need to generate a cfi

				// No pageList found
				if(pageList.length === 0) {
					return;
				}

				book.pageList = book.contents.pageList = pageList;

				// Replace HREFs with CFI
				book.pageList.forEach(function(pg){
					if(!pg.cfi) {
						wait += 1;
						epubcfi.generateCfiFromHref(pg.href, book).then(function(cfi){
							pg.cfi = cfi;
							pg.packageUrl = book.settings.packageUrl;

							wait -= 1;
							if(wait === 0) {
								book.pagination.process(book.pageList);
								book.ready.pageList.resolve(book.pageList);
							}
						});
					}
				});

				if(!wait) {
					book.pagination.process(book.pageList);
					book.ready.pageList.resolve(book.pageList);
				}

			}, function(error) {
				book.ready.pageList.resolve([]);
			});
	} else if(book.contents.tocPath) {
		book.settings.tocUrl = book.settings.contentsPath + book.contents.tocPath;

		book.loadXml(book.settings.tocUrl).
			then(function(tocXml){
					return parse.toc(tocXml, book.spineIndexByURL, book.spine); // Grab Table of Contents
			}).then(function(toc){
				book.toc = book.contents.toc = toc;
				book.ready.toc.resolve(book.contents.toc);
			}, function(error) {
				book.ready.toc.resolve(false);
			});

	} else {
		book.ready.toc.resolve(false);
	}

};

EPUBJS.Book.prototype.createHiddenRender = function(renderer, _width, _height) {
	var box = this.element.getBoundingClientRect();
	var width = _width || this.settings.width || box.width;
	var height = _height || this.settings.height || box.height;
	var hiddenContainer;
	var hiddenEl;
	renderer.setMinSpreadWidth(this.settings.minSpreadWidth);
	renderer.setGap(this.settings.gap);

  this._registerReplacements(renderer);
	if(this.settings.forceSingle) {
		renderer.forceSingle(true);
	}

	hiddenContainer = document.createElement("div");
	hiddenContainer.style.visibility = "hidden";
	hiddenContainer.style.overflow = "hidden";
	hiddenContainer.style.width = "0";
	hiddenContainer.style.height = "0";
	this.element.appendChild(hiddenContainer);

	hiddenEl = document.createElement("div");
	hiddenEl.style.visibility = "hidden";
	hiddenEl.style.overflow = "hidden";
	hiddenEl.style.width = width + "px";//"0";
	hiddenEl.style.height = height +"px"; //"0";
	hiddenContainer.appendChild(hiddenEl);

	renderer.initialize(hiddenEl);
	return hiddenContainer;
};

// Generates the pageList array by loading every chapter and paging through them
EPUBJS.Book.prototype.generatePageList = function(width, height){
	var pageList = [];
	var pager = new EPUBJS.Renderer(this.settings.render_method, false); //hidden
	var hiddenContainer = this.createHiddenRender(pager, width, height);
	var deferred = new RSVP.defer();
	var spinePos = -1;
	var spineLength = this.spine.length;
	var totalPages = 0;
	var currentPage = 0;
	var nextChapter = function(deferred){
		var chapter;
		var next = spinePos + 1;
		var done = deferred || new RSVP.defer();
		var loaded;
		if(next >= spineLength) {
			done.resolve();
		} else {
			spinePos = next;
			chapter = new EPUBJS.Chapter(this.spine[spinePos], this.store);
			pager.displayChapter(chapter, this.globalLayoutProperties).then(function(chap){
				pager.pageMap.forEach(function(item){
					currentPage += 1;
					pageList.push({
						"cfi" : item.start,
						"page" : currentPage
					});

				});

				if(pager.pageMap.length % 2 > 0 &&
					 pager.spreads) {
					currentPage += 1; // Handle Spreads
					pageList.push({
						"cfi" : pager.pageMap[pager.pageMap.length - 1].end,
						"page" : currentPage
					});
				}

				// Load up the next chapter
				setTimeout(function(){
					nextChapter(done);
				}, 1);
			});
		}
		return done.promise;
	}.bind(this);

	var finished = nextChapter().then(function(){
		pager.remove();
		this.element.removeChild(hiddenContainer);
		deferred.resolve(pageList);
	}.bind(this));

	return deferred.promise;
};

// Render out entire book and generate the pagination
// Width and Height are optional and will default to the current dimensions
EPUBJS.Book.prototype.generatePagination = function(width, height) {
	var book = this;
	var defered = new RSVP.defer();

	this.ready.spine.promise.then(function(){
		book.generatePageList(width, height).then(function(pageList){
			book.pageList = book.contents.pageList = pageList;
			book.pagination.process(pageList);
			book.ready.pageList.resolve(book.pageList);
			defered.resolve(book.pageList);
		});
	});

	return defered.promise;
};

// Process the pagination from a JSON array containing the pagelist
EPUBJS.Book.prototype.loadPagination = function(pagelistJSON) {
	var pageList = JSON.parse(pagelistJSON);

	if(pageList && pageList.length) {
		this.pageList = pageList;
		this.pagination.process(this.pageList);
		this.ready.pageList.resolve(this.pageList);
	}
	return this.pageList;
};

EPUBJS.Book.prototype.getPageList = function() {
	return this.ready.pageList.promise;
};

EPUBJS.Book.prototype.getMetadata = function() {
	return this.ready.metadata.promise;
};

EPUBJS.Book.prototype.getToc = function() {
	return this.ready.toc.promise;
};

/* Private Helpers */

//-- Listeners for browser events
EPUBJS.Book.prototype.networkListeners = function(){
	var book = this;
	window.addEventListener("offline", function(e) {
		book.online = false;
		if (book.settings.storage) {
			book.fromStorage(true);
		}
		book.trigger("book:offline");
	}, false);

	window.addEventListener("online", function(e) {
		book.online = true;
		if (book.settings.storage) {
			book.fromStorage(false);
		}
		book.trigger("book:online");
	}, false);

};

// Listen to all events the renderer triggers and pass them as book events
EPUBJS.Book.prototype.listenToRenderer = function(renderer){
	var book = this;
	renderer.Events.forEach(function(eventName){
		renderer.on(eventName, function(e){
			book.trigger(eventName, e);
		});
	});

	renderer.on("renderer:visibleRangeChanged", function(range) {
		var startPage, endPage, percent;
		var pageRange = [];

		if(this.pageList.length > 0) {
			startPage = this.pagination.pageFromCfi(range.start);
			percent = this.pagination.percentageFromPage(startPage);
			pageRange.push(startPage);

			if(range.end) {
				endPage = this.pagination.pageFromCfi(range.end);
				//if(startPage != endPage) {
					pageRange.push(endPage);
				//}
			}
			this.trigger("book:pageChanged", {
				"anchorPage": startPage,
				"percentage": percent,
				"pageRange" : pageRange
			});

			// TODO: Add event for first and last page.
			// (though last is going to be hard, since it could be several reflowed pages long)
		}
	}.bind(this));

	renderer.on("render:loaded", this.loadChange.bind(this));
};

// Listens for load events from the Renderer and checks against the current chapter
// Prevents the Render from loading a different chapter when back button is pressed
EPUBJS.Book.prototype.loadChange = function(url){
	var uri = EPUBJS.core.uri(url);
	var chapterUri = EPUBJS.core.uri(this.currentChapter.absolute);
	var spinePos, chapter;

	if(uri.path != chapterUri.path){
		console.warn("Miss Match", uri.path, this.currentChapter.absolute);
		// this.goto(uri.filename);

		// Set the current chapter to what is being displayed
		spinePos = this.spineIndexByURL[uri.filename];
		chapter = new EPUBJS.Chapter(this.spine[spinePos], this.store);
		this.currentChapter = chapter;

		// setup the renderer with the displayed chapter
		this.renderer.currentChapter = chapter;
		this.renderer.afterLoad(this.renderer.render.docEl);
		this.renderer.beforeDisplay(function () {
			this.renderer.afterDisplay();
		}.bind(this));

	} else if(!this._rendering) {
		this.renderer.reformat();
	}
};

EPUBJS.Book.prototype.unlistenToRenderer = function(renderer){
	renderer.Events.forEach(function(eventName){
		renderer.off(eventName);
	}	);
};

//-- Choose between a request from store or a request from network
EPUBJS.Book.prototype.loadXml = function(url){
	if(this.settings.fromStorage) {
		return this.store.getXml(url, this.settings.encoding);
	} else if(this.settings.contained) {
		return this.zip.getXml(url, this.settings.encoding);
	}else{
		return EPUBJS.core.request(url, 'xml', this.settings.withCredentials);
	}
};

//-- Turns a url into a absolute url
EPUBJS.Book.prototype.urlFrom = function(bookPath){
	var uri = EPUBJS.core.uri(bookPath),
		absolute = uri.protocol,
		fromRoot = uri.path[0] == "/",
		location = window.location,
		//-- Get URL orgin, try for native or combine
		origin = location.origin || location.protocol + "//" + location.host,
		baseTag = document.getElementsByTagName('base'),
		base;


	//-- Check is Base tag is set

	if(baseTag.length) {
		base = baseTag[0].href;
	}

	//-- 1. Check if url is absolute
	if(uri.protocol){
		return uri.origin + uri.path;
	}

	//-- 2. Check if url starts with /, add base url
	if(!absolute && fromRoot){
		return (base || origin) + uri.path;
	}

	//-- 3. Or find full path to url and add that
	if(!absolute && !fromRoot){
		return EPUBJS.core.resolveUrl(base || location.pathname, uri.path);
	}

};


EPUBJS.Book.prototype.unarchive = function(bookPath){
	var book = this,
		unarchived;

	//-- Must use storage
	// if(this.settings.storage == false ){
		// this.settings.storage = true;
		// this.storage = new fileStorage.storage();
	// }

	this.zip = new EPUBJS.Unarchiver();
	this.store = this.zip; // Use zip storaged in ram
	return this.zip.open(bookPath);
};

//-- Checks if url has a .epub or .zip extension
EPUBJS.Book.prototype.isContained = function(bookUrl){
	var uri = EPUBJS.core.uri(bookUrl);

	if(uri.extension && (uri.extension == "epub" || uri.extension == "zip")){
		return true;
	}

	return false;
};

//-- Checks if the book can be retrieved from localStorage
EPUBJS.Book.prototype.isSaved = function(bookKey) {
	var storedSettings;

	if(!localStorage) {
		return false;
	}

	storedSettings = localStorage.getItem(bookKey);

	if( !localStorage ||
		storedSettings === null) {
		return false;
	} else {
		return true;
	}
};

// Generates the Book Key using the identifer in the manifest or other string provided
EPUBJS.Book.prototype.generateBookKey = function(identifier){
	return "epubjs:" + EPUBJS.VERSION + ":" + window.location.host + ":" + identifier;
};

EPUBJS.Book.prototype.saveContents = function(){
	if(!localStorage) {
		return false;
	}
	localStorage.setItem(this.settings.bookKey, JSON.stringify(this.contents));
};

EPUBJS.Book.prototype.removeSavedContents = function() {
	if(!localStorage) {
		return false;
	}
	localStorage.removeItem(this.settings.bookKey);
};



//-- Takes a string or a element
EPUBJS.Book.prototype.renderTo = function(elem){
	var book = this,
		rendered;

	if(EPUBJS.core.isElement(elem)) {
		this.element = elem;
	} else if (typeof elem == "string") {
		this.element = EPUBJS.core.getEl(elem);
	} else {
		console.error("Not an Element");
		return;
	}

	rendered = this.opened.
				then(function(){
					// book.render = new EPUBJS.Renderer[this.settings.renderer](book);
					book.renderer.initialize(book.element, book.settings.width, book.settings.height);

					if(book.metadata.direction) {
						book.renderer.setDirection(book.metadata.direction);
					}

					book._rendered();
					return book.startDisplay();
				});

	// rendered.then(null, function(error) { console.error(error); });

	return rendered;
};

EPUBJS.Book.prototype.startDisplay = function(){
	var display;

	if(this.settings.goto) {
		display = this.goto(this.settings.goto);
	}else if(this.settings.previousLocationCfi) {
		display = this.gotoCfi(this.settings.previousLocationCfi);
	}else{
		display = this.displayChapter(this.spinePos);
	}

	return display;
};

EPUBJS.Book.prototype.restore = function(identifier){

	var book = this,
			fetch = ['manifest', 'spine', 'metadata', 'cover', 'toc', 'spineNodeIndex', 'spineIndexByURL', 'globalLayoutProperties'],
			reject = false,
			bookKey = this.generateBookKey(identifier),
			fromStore = localStorage.getItem(bookKey),
			len = fetch.length,
			i;

	if(this.settings.clearSaved) reject = true;

	if(!reject && fromStore != 'undefined' && fromStore !== null){
		book.contents = JSON.parse(fromStore);

		for(i = 0; i < len; i++) {
			var item = fetch[i];

			if(!book.contents[item]) {
				reject = true;
				break;
			}
			book[item] = book.contents[item];
		}
	}

	if(reject || !fromStore || !this.contents || !this.settings.contentsPath){
		return false;
	}else{
		this.settings.bookKey = bookKey;
		this.ready.manifest.resolve(this.manifest);
		this.ready.spine.resolve(this.spine);
		this.ready.metadata.resolve(this.metadata);
		this.ready.cover.resolve(this.cover);
		this.ready.toc.resolve(this.toc);
		return true;
	}

};

EPUBJS.Book.prototype.displayChapter = function(chap, end, deferred){
	var book = this,
		render,
		cfi,
		pos,
		store,
		defer = deferred || new RSVP.defer();

	var chapter;

	if(!this.isRendered) {
		this._q.enqueue("displayChapter", arguments);
		// Reject for now. TODO: pass promise to queue
		defer.reject({
				message : "Rendering",
				stack : new Error().stack
			});
		return defer.promise;
	}


	if(this._rendering || this._rendering) {
		// Pass along the current defer
		this._displayQ.enqueue("displayChapter", [chap, end, defer]);
		return defer.promise;
	}

	if(EPUBJS.core.isNumber(chap)){
		pos = chap;
	}else{
		cfi = new EPUBJS.EpubCFI(chap);
		pos = cfi.spinePos;
	}

	if(pos < 0 || pos >= this.spine.length){
		console.warn("Not A Valid Location");
		pos = 0;
		end = false;
		cfi = false;
	}

	//-- Create a new chapter
	chapter = new EPUBJS.Chapter(this.spine[pos], this.store);

	this._rendering = true;

	if(this._needsAssetReplacement()) {

		chapter.registerHook("beforeChapterRender", [
			EPUBJS.replace.head,
			EPUBJS.replace.resources,
			EPUBJS.replace.svg
		], true);

	}

	book.currentChapter = chapter;

	render = book.renderer.displayChapter(chapter, this.globalLayoutProperties);
	if(cfi) {
		book.renderer.gotoCfi(cfi);
	} else if(end) {
		book.renderer.lastPage();
	}
	//-- Success, Clear render queue
	render.then(function(rendered){
		// var inwait;
		//-- Set the book's spine position
		book.spinePos = pos;

		defer.resolve(book.renderer);

		if(book.settings.fromStorage === false &&
			book.settings.contained === false) {
			book.preloadNextChapter();
		}

		book._rendering = false;
		book._displayQ.dequeue();
		if(book._displayQ.length() === 0) {
			book._gotoQ.dequeue();
		}

	}, function(error) {
		// handle errors in either of the two requests
		console.error("Could not load Chapter: "+ chapter.absolute, error);
		book.trigger("book:chapterLoadFailed", chapter.absolute);
		book._rendering = false;
		defer.reject(error);
	});

	return defer.promise;
};

EPUBJS.Book.prototype.nextPage = function(){
	var next;

	if(!this.isRendered) return this._q.enqueue("nextPage", arguments);

	next = this.renderer.nextPage();

	if(!next){
		return this.nextChapter();
	}
};

EPUBJS.Book.prototype.prevPage = function() {
	var prev;

	if(!this.isRendered) return this._q.enqueue("prevPage", arguments);

	prev = this.renderer.prevPage();

	if(!prev){
		return this.prevChapter();
	}
};

EPUBJS.Book.prototype.nextChapter = function() {
	var next;
	if (this.spinePos < this.spine.length - 1) {
		next = this.spinePos + 1;
		// Skip non linear chapters
		while (this.spine[next] && this.spine[next].linear && this.spine[next].linear == 'no') {
			next++;
		}
		if (next < this.spine.length) {
			return this.displayChapter(next);
		} else {
			this.trigger("book:atEnd");
		}

	} else {
		this.trigger("book:atEnd");
	}
};

EPUBJS.Book.prototype.prevChapter = function() {
	var prev;
	if (this.spinePos > 0) {
		prev = this.spinePos - 1;
		while (this.spine[prev] && this.spine[prev].linear && this.spine[prev].linear == 'no') {
			prev--;
		}
		if (prev >= 0) {
			return this.displayChapter(prev, true);
		} else {
			this.trigger("book:atStart");
		}

	} else {
		this.trigger("book:atStart");
	}
};

EPUBJS.Book.prototype.getCurrentLocationCfi = function() {
	if(!this.isRendered) return false;
	return this.renderer.currentLocationCfi;
};

EPUBJS.Book.prototype.goto = function(target){

	if(target.indexOf("epubcfi(") === 0) {
		return this.gotoCfi(target);
	} else if(target.indexOf("%") === target.length-1) {
		return this.gotoPercentage(parseInt(target.substring(0, target.length-1))/100);
	} else if(typeof target === "number" || isNaN(target) === false){
		return this.gotoPage(target);
	} else {
		return this.gotoHref(target);
	}

};

EPUBJS.Book.prototype.gotoCfi = function(cfiString, defer){
	var cfi,
			spinePos,
			spineItem,
			rendered,
			deferred = defer || new RSVP.defer();

	if(!this.isRendered) {
		console.warn("Not yet Rendered");
		this.settings.previousLocationCfi = cfiString;
		return false;
	}

	// Currently going to a chapter
	if(this._moving || this._rendering) {
		console.warn("Renderer is moving");
		this._gotoQ.enqueue("gotoCfi", [cfiString, deferred]);
		return false;
	}

	cfi = new EPUBJS.EpubCFI(cfiString);
	spinePos = cfi.spinePos;

	if(spinePos == -1) {
		return false;
	}

	spineItem = this.spine[spinePos];
	promise = deferred.promise;
	this._moving = true;
	//-- If same chapter only stay on current chapter
	if(this.currentChapter && this.spinePos === spinePos){
		this.renderer.gotoCfi(cfi);
		this._moving = false;
		deferred.resolve(this.renderer.currentLocationCfi);
	} else {

		if(!spineItem || spinePos == -1) {
			spinePos = 0;
			spineItem = this.spine[spinePos];
		}

		this.currentChapter = new EPUBJS.Chapter(spineItem, this.store);

		if(this.currentChapter) {
			this.spinePos = spinePos;
			render = this.renderer.displayChapter(this.currentChapter, this.globalLayoutProperties);

			this.renderer.gotoCfi(cfi);
			render.then(function(rendered){
					this._moving = false;
					deferred.resolve(rendered.currentLocationCfi);
			}.bind(this));
		}
	}

	promise.then(function(){
		this._gotoQ.dequeue();
	}.bind(this));

	return promise;
};

EPUBJS.Book.prototype.gotoHref = function(url, defer){
	var split, chapter, section, relativeURL, spinePos;
	var deferred = defer || new RSVP.defer();

	if(!this.isRendered) {
		this.settings.goto = url;
		return false;
	}

	// Currently going to a chapter
	if(this._moving || this._rendering) {
		this._gotoQ.enqueue("gotoHref", [url, deferred]);
		return false;
	}

	split = url.split("#");
	chapter = split[0];
	section = split[1] || false;
	// absoluteURL = (chapter.search("://") === -1) ? (this.settings.contentsPath + chapter) : chapter;
	relativeURL = chapter.replace(this.settings.contentsPath, '');
	spinePos = this.spineIndexByURL[relativeURL];

	//-- If link fragment only stay on current chapter
	if(!chapter){
		spinePos = this.currentChapter ? this.currentChapter.spinePos : 0;
	}

	//-- Check that URL is present in the index, or stop
	if(typeof(spinePos) != "number") return false;

	if(!this.currentChapter || spinePos != this.currentChapter.spinePos){
		//-- Load new chapter if different than current
		return this.displayChapter(spinePos).then(function(){
				if(section){
					this.renderer.section(section);
				}
				deferred.resolve(this.renderer.currentLocationCfi);
			}.bind(this));
	}else{
		//--  Goto section
		if(section) {
			this.renderer.section(section);
		} else {
			// Or jump to the start
			this.renderer.firstPage();
		}
		deferred.resolve(this.renderer.currentLocationCfi);
	}

	deferred.promise.then(function(){
		this._gotoQ.dequeue();
	}.bind(this));

	return deferred.promise;
};

EPUBJS.Book.prototype.gotoPage = function(pg){
	var cfi = this.pagination.cfiFromPage(pg);
	return this.gotoCfi(cfi);
};

EPUBJS.Book.prototype.gotoPercentage = function(percent){
	var pg = this.pagination.pageFromPercentage(percent);
	return this.gotoPage(pg);
};

EPUBJS.Book.prototype.preloadNextChapter = function() {
	var next;
	var chap = this.spinePos + 1;

	if(chap >= this.spine.length){
		return false;
	}

	next = new EPUBJS.Chapter(this.spine[chap]);
	if(next) {
		EPUBJS.core.request(next.absolute);
	}
};

EPUBJS.Book.prototype.storeOffline = function() {
	var book = this,
		assets = EPUBJS.core.values(this.manifest);

	//-- Creates a queue of all items to load
	return this.store.put(assets).
			then(function(){
				book.settings.stored = true;
				book.trigger("book:stored");
			});
};

EPUBJS.Book.prototype.availableOffline = function() {
	return this.settings.stored > 0 ? true : false;
};

EPUBJS.Book.prototype.toStorage = function () {
	var key = this.settings.bookKey;
	this.store.isStored(key).then(function(stored) {

		if (stored === true) {
			this.settings.stored = true;
			return true;
		}

		return this.storeOffline()
			.then(function() {
				this.store.token(key, true);
			}.bind(this));

	}.bind(this));

};
EPUBJS.Book.prototype.fromStorage = function(stored) {
	var hooks = [
		EPUBJS.replace.head,
		EPUBJS.replace.resources,
		EPUBJS.replace.svg
	];

	if(this.contained || this.settings.contained) return;

	//-- If there is network connection, store the books contents
	if(this.online){
		this.opened.then(this.toStorage.bind(this));
	}

	if(this.store && this.settings.fromStorage && stored === false){
		this.settings.fromStorage = false;
		this.store.off("offline");
		// this.renderer.removeHook("beforeChapterRender", hooks, true);
		this.store = false;
	}else if(!this.settings.fromStorage){

		this.store = new EPUBJS.Storage(this.settings.credentials);
		this.store.on("offline", function (offline) {
			if (!offline) {
				// Online
				this.offline = false;
				this.settings.fromStorage = false;
				// this.renderer.removeHook("beforeChapterRender", hooks, true);
				this.trigger("book:online");
			} else {
				// Offline
				this.offline = true;
				this.settings.fromStorage = true;
				// this.renderer.registerHook("beforeChapterRender", hooks, true);
				this.trigger("book:offline");
			}
		}.bind(this));

	}

};

EPUBJS.Book.prototype.setStyle = function(style, val, prefixed) {
	var noreflow = ["color", "background", "background-color"];

	if(!this.isRendered) return this._q.enqueue("setStyle", arguments);

	this.settings.styles[style] = val;

	this.renderer.setStyle(style, val, prefixed);

	if(noreflow.indexOf(style) === -1) {
		// clearTimeout(this.reformatTimeout);
		// this.reformatTimeout = setTimeout(function(){
		this.renderer.reformat();
		// }.bind(this), 10);
	}
};

EPUBJS.Book.prototype.removeStyle = function(style) {
	if(!this.isRendered) return this._q.enqueue("removeStyle", arguments);
	this.renderer.removeStyle(style);
	this.renderer.reformat();
	delete this.settings.styles[style];
};

EPUBJS.Book.prototype.addHeadTag = function(tag, attrs) {
	if(!this.isRendered) return this._q.enqueue("addHeadTag", arguments);
    this.settings.headTags[tag] = attrs;
};

EPUBJS.Book.prototype.useSpreads = function(use) {
	console.warn("useSpreads is deprecated, use forceSingle or set a layoutOveride instead");
	if(use === false) {
		this.forceSingle(true);
	} else {
		this.forceSingle(false);
	}
};

EPUBJS.Book.prototype.forceSingle = function(_use) {
	var force = typeof _use === "undefined" ? true : _use;

	this.renderer.forceSingle(force);
	this.settings.forceSingle = force;
	if(this.isRendered) {
		this.renderer.reformat();
	}
};

EPUBJS.Book.prototype.setMinSpreadWidth = function(width) {
	this.settings.minSpreadWidth = width;
	if(this.isRendered) {
		this.renderer.setMinSpreadWidth(this.settings.minSpreadWidth);
		this.renderer.reformat();
	}
};

EPUBJS.Book.prototype.setGap = function(gap) {
	this.settings.gap = gap;
	if(this.isRendered) {
		this.renderer.setGap(this.settings.gap);
		this.renderer.reformat();
	}
};

EPUBJS.Book.prototype.chapter = function(path) {
	var spinePos = this.spineIndexByURL[path];
	var spineItem;
	var chapter;

	if(spinePos){
		spineItem = this.spine[spinePos];
		chapter = new EPUBJS.Chapter(spineItem, this.store);
		chapter.load();
	}
	return chapter;
};

EPUBJS.Book.prototype.unload = function(){

	if(this.settings.restore && localStorage) {
		this.saveContents();
	}

	this.unlistenToRenderer(this.renderer);

	this.trigger("book:unload");
};

EPUBJS.Book.prototype.destroy = function() {

	window.removeEventListener("beforeunload", this.unload);

	if(this.currentChapter) this.currentChapter.unload();

	this.unload();

	if(this.renderer) this.renderer.remove();

};

EPUBJS.Book.prototype._ready = function() {

	this.trigger("book:ready");

};

EPUBJS.Book.prototype._rendered = function(err) {
	var book = this;

	this.isRendered = true;
	this.trigger("book:rendered");

	this._q.flush();
};


EPUBJS.Book.prototype.applyStyles = function(renderer, callback){
	// if(!this.isRendered) return this._q.enqueue("applyStyles", arguments);
	renderer.applyStyles(this.settings.styles);
	callback();
};

EPUBJS.Book.prototype.applyHeadTags = function(renderer, callback){
	// if(!this.isRendered) return this._q.enqueue("applyHeadTags", arguments);
	renderer.applyHeadTags(this.settings.headTags);
	callback();
};

EPUBJS.Book.prototype._registerReplacements = function(renderer){
	renderer.registerHook("beforeChapterDisplay", this.applyStyles.bind(this, renderer), true);
	renderer.registerHook("beforeChapterDisplay", this.applyHeadTags.bind(this, renderer), true);
	renderer.registerHook("beforeChapterDisplay", EPUBJS.replace.hrefs.bind(this), true);
};

EPUBJS.Book.prototype._needsAssetReplacement = function(){
	if(this.settings.fromStorage) {

		//-- Filesystem api links are relative, so no need to replace them
		// if(this.storage.getStorageType() == "filesystem") {
		// 	return false;
		// }

		return true;

	} else if(this.settings.contained) {

		return true;

	} else {

		return false;

	}
};


//-- http://www.idpf.org/epub/fxl/
EPUBJS.Book.prototype.parseLayoutProperties = function(metadata){
	var layout = (this.layoutOveride && this.layoutOveride.layout) || metadata.layout || "reflowable";
	var spread = (this.layoutOveride && this.layoutOveride.spread) || metadata.spread || "auto";
	var orientation = (this.layoutOveride && this.layoutOveride.orientation) || metadata.orientation || "auto";
	return {
		layout : layout,
		spread : spread,
		orientation : orientation
	};
};

//-- Enable binding events to book
RSVP.EventTarget.mixin(EPUBJS.Book.prototype);

//-- Handle RSVP Errors
RSVP.on('error', function(event) {
	//console.error(event, event.detail);
});

RSVP.configure('instrument', false); //-- true | will logging out all RSVP rejections
// RSVP.on('created', listener);
// RSVP.on('chained', listener);
// RSVP.on('fulfilled', listener);
// RSVP.on('rejected', function(event){
// 	console.error(event.detail.message, event.detail.stack);
// });

EPUBJS.Chapter = function(spineObject, store){
	this.href = spineObject.href;
	this.absolute = spineObject.url;
	this.id = spineObject.id;
	this.spinePos = spineObject.index;
	this.cfiBase = spineObject.cfiBase;
	this.properties = spineObject.properties;
	this.manifestProperties = spineObject.manifestProperties;
	this.linear = spineObject.linear;
	this.pages = 1;
	this.store = store;
	this.epubcfi = new EPUBJS.EpubCFI();
	this.deferred = new RSVP.defer();
	this.loaded = this.deferred.promise;

	EPUBJS.Hooks.mixin(this);
	//-- Get pre-registered hooks for events
	this.getHooks("beforeChapterRender");

	// Cached for replacement urls from storage
	this.caches = {};
};


EPUBJS.Chapter.prototype.load = function(_store){
	var store = _store || this.store;
	var promise;
	// if(this.store && (!this.book.online || this.book.contained))
	if(store){
		promise = store.getXml(this.absolute);
	}else{
		promise = EPUBJS.core.request(this.absolute, 'xml');
	}

	promise.then(function(xml){
		this.setDocument(xml);
		this.deferred.resolve(this);
	}.bind(this));

	return promise;
};

EPUBJS.Chapter.prototype.render = function(_store){

	return this.load().then(function(doc){

		var head = doc.querySelector('head');
		var base = doc.createElement("base");

		base.setAttribute("href", this.absolute);
		head.insertBefore(base, head.firstChild);

		this.contents = doc;

		return new RSVP.Promise(function (resolve, reject) {
			this.triggerHooks("beforeChapterRender", function () {
				resolve(doc);
			}.bind(this), this);
		}.bind(this));

	}.bind(this))
	.then(function(doc) {
		var serializer = new XMLSerializer();
		var contents = serializer.serializeToString(doc);
		return contents;
	}.bind(this));
};

EPUBJS.Chapter.prototype.url = function(_store){
	var deferred = new RSVP.defer();
	var store = _store || this.store;
	var loaded;
	var chapter = this;
	var url;

	if(store){
		if(!this.tempUrl) {
			store.getUrl(this.absolute).then(function(url){
				chapter.tempUrl = url;
				deferred.resolve(url);
			});
		} else {
			url = this.tempUrl;
			deferred.resolve(url);
		}
	}else{
		url = this.absolute;
		deferred.resolve(url);
	}
	/*
	loaded = EPUBJS.core.request(url, 'xml', false);
	loaded.then(function(contents){
		chapter.contents = contents;
		deferred.resolve(chapter.absolute);
	}, function(error){
		deferred.reject(error);
	});
	*/

	return deferred.promise;
};

EPUBJS.Chapter.prototype.setPages = function(num){
	this.pages = num;
};

EPUBJS.Chapter.prototype.getPages = function(num){
	return this.pages;
};

EPUBJS.Chapter.prototype.getID = function(){
	return this.ID;
};

EPUBJS.Chapter.prototype.unload = function(store){
	this.document = null;
	if(this.tempUrl && store) {
		store.revokeUrl(this.tempUrl);
		this.tempUrl = false;
	}
};

EPUBJS.Chapter.prototype.setDocument = function(_document){
	var uri = _document.namespaceURI;
	var doctype = _document.doctype;

	// Creates an empty document
	this.document = _document.implementation.createDocument(
			uri,
			null,
			null
	);
	this.contents = this.document.importNode(
			_document.documentElement, //node to import
			true                         //clone its descendants
	);

	this.document.appendChild(this.contents);

	// Fix to apply wgxpath to new document in IE
	if(!this.document.evaluate && document.evaluate) {
		this.document.evaluate = document.evaluate;
	}

	// this.deferred.resolve(this.contents);
};

EPUBJS.Chapter.prototype.cfiFromRange = function(_range) {
	var range;
	var startXpath, endXpath;
	var startContainer, endContainer;
	var cleanTextContent, cleanEndTextContent;

	// Check for Contents
	if(!this.document) return;

	if(typeof document.evaluate != 'undefined') {

		startXpath = EPUBJS.core.getElementXPath(_range.startContainer);
		// console.log(startContainer)
		endXpath = EPUBJS.core.getElementXPath(_range.endContainer);

		startContainer = this.document.evaluate(startXpath, this.document, EPUBJS.core.nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;

		if(!_range.collapsed) {
			endContainer = this.document.evaluate(endXpath, this.document, EPUBJS.core.nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
		}

		range = this.document.createRange();
		// Find Exact Range in original document
		if(startContainer) {
			try {
				range.setStart(startContainer, _range.startOffset);
				if(!_range.collapsed && endContainer) {
					range.setEnd(endContainer, _range.endOffset);
				}
			} catch (e) {
				console.log("missed");
				startContainer = false;
			}

		}

		// Fuzzy Match
		if(!startContainer) {
			console.log("not found, try fuzzy match");
			cleanStartTextContent = EPUBJS.core.cleanStringForXpath(_range.startContainer.textContent);
			startXpath = "//text()[contains(.," + cleanStartTextContent + ")]";

			startContainer = this.document.evaluate(startXpath, this.document, EPUBJS.core.nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;

			if(startContainer){
				// console.log("Found with Fuzzy");
				range.setStart(startContainer, _range.startOffset);

				if(!_range.collapsed) {
					cleanEndTextContent = EPUBJS.core.cleanStringForXpath(_range.endContainer.textContent);
					endXpath = "//text()[contains(.," + cleanEndTextContent + ")]";
					endContainer = this.document.evaluate(endXpath, this.document, EPUBJS.core.nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
					if(endContainer) {
						range.setEnd(endContainer, _range.endOffset);
					}
				}

			}
		}
	} else {
		range = _range; // Just evaluate the current documents range
	}

	// Generate the Cfi
	return this.epubcfi.generateCfiFromRange(range, this.cfiBase);
};

EPUBJS.Chapter.prototype.find = function(_query){
	var chapter = this;
	var matches = [];
	var query = _query.toLowerCase();
	//var xpath = this.document.evaluate(".//text()[contains(translate(., '"+query.toUpperCase()+"', '"+query+"'),'"+query+"')]", this.document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
	var find = function(node){
		// Search String
		var text = node.textContent.toLowerCase();
		var range = chapter.document.createRange();
		var cfi;
		var pos;
		var last = -1;
		var excerpt;
		var limit = 150;

		while (pos != -1) {
			pos = text.indexOf(query, last + 1);

			if(pos != -1) {
				// If Found, Create Range
				range = chapter.document.createRange();
				range.setStart(node, pos);
				range.setEnd(node, pos + query.length);

				//Generate CFI
				cfi = chapter.cfiFromRange(range);

				// Generate Excerpt
				if(node.textContent.length < limit) {
					excerpt = node.textContent;
				} else {
					excerpt = node.textContent.substring(pos-limit/2,pos+limit/2);
					excerpt = "..." + excerpt + "...";
				}

				//Add CFI to list
				matches.push({
					cfi: cfi,
					excerpt: excerpt
				});
			}

			last = pos;
		}

	};

	// Grab text nodes

	/*
	for ( var i=0 ; i < xpath.snapshotLength; i++ ) {
		find(xpath.snapshotItem(i));
	}
	*/

	this.textSprint(this.document, function(node){
		find(node);
	});


	// Return List of CFIs
	return matches;
};


EPUBJS.Chapter.prototype.textSprint = function(root, func) {
	var treeWalker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, {
			acceptNode: function (node) {
					if (node.data && ! /^\s*$/.test(node.data) ) {
						return NodeFilter.FILTER_ACCEPT;
					} else {
						return NodeFilter.FILTER_REJECT;
					}
			}
	}, false);
	var node;
	while ((node = treeWalker.nextNode())) {
		func(node);
	}

};

EPUBJS.Chapter.prototype.replace = function(query, func, finished, progress){
	var items = this.contents.querySelectorAll(query),
		resources = Array.prototype.slice.call(items),
		count = resources.length;


	if(count === 0) {
		finished(false);
		return;
	}
	resources.forEach(function(item){
		var called = false;
		var after = function(result, full){
			if(called === false) {
				count--;
				if(progress) progress(result, full, count);
				if(count <= 0 && finished) finished(true);
				called = true;
			}
		};

		func(item, after);

	}.bind(this));

};

EPUBJS.Chapter.prototype.replaceWithStored = function(query, attr, func, callback) {
	var _oldUrls,
			_newUrls = {},
			_store = this.store,
			_cache = this.caches[query],
			_uri = EPUBJS.core.uri(this.absolute),
			_chapterBase = _uri.base,
			_attr = attr,
			_wait = 5,
			progress = function(url, full, count) {
				_newUrls[full] = url;
			},
			finished = function(notempty) {
				if(callback) callback();
				EPUBJS.core.values(_oldUrls).forEach(function(url){
					_store.revokeUrl(url);
				});

				_cache = _newUrls;
			};

	if(!_store) return;

	if(!_cache) _cache = {};
	_oldUrls = EPUBJS.core.clone(_cache);

	this.replace(query, function(link, done){
		var src = link.getAttribute(_attr),
				full = EPUBJS.core.resolveUrl(_chapterBase, src);

		var replaceUrl = function(url) {
				var timeout;
				link.onload = function(){
					clearTimeout(timeout);
					done(url, full);
				};

				link.onerror = function(e){
					clearTimeout(timeout);
					done(url, full);
					console.error(e);
				};

				if(query == "image") {
					//-- SVG needs this to trigger a load event
					link.setAttribute("externalResourcesRequired", "true");
				}

				if(query == "link[href]" && link.getAttribute("rel") !== "stylesheet") {
					//-- Only Stylesheet links seem to have a load events, just continue others
					done(url, full);
				} else {
					timeout = setTimeout(function(){
						done(url, full);
					}, _wait);
				}

				link.setAttribute(_attr, url);



			};

		if(full in _oldUrls){
			replaceUrl(_oldUrls[full]);
			_newUrls[full] = _oldUrls[full];
			delete _oldUrls[full];
		}else{
			func(_store, full, replaceUrl, link);
		}

	}, finished, progress);
};

var EPUBJS = EPUBJS || {};
EPUBJS.core = {};

//-- Get a element for an id
EPUBJS.core.getEl = function(elem) {
	return document.getElementById(elem);
};

//-- Get all elements for a class
EPUBJS.core.getEls = function(classes) {
	return document.getElementsByClassName(classes);
};

EPUBJS.core.request = function(url, type, withCredentials) {
	var supportsURL = window.URL;
	var BLOB_RESPONSE = supportsURL ? "blob" : "arraybuffer";

	var deferred = new RSVP.defer();

	var xhr = new XMLHttpRequest();

	//-- Check from PDF.js:
	//   https://github.com/mozilla/pdf.js/blob/master/web/compatibility.js
	var xhrPrototype = XMLHttpRequest.prototype;

	if (!('overrideMimeType' in xhrPrototype)) {
		// IE10 might have response, but not overrideMimeType
		Object.defineProperty(xhrPrototype, 'overrideMimeType', {
			value: function xmlHttpRequestOverrideMimeType(mimeType) {}
		});
	}
	if(withCredentials) {
		xhr.withCredentials = true;
	}
	xhr.open("GET", url, true);
	xhr.onreadystatechange = handler;

	if(type == 'blob'){
		xhr.responseType = BLOB_RESPONSE;
	}

	if(type == "json") {
		xhr.setRequestHeader("Accept", "application/json");
	}

	if(type == 'xml') {
		xhr.overrideMimeType('text/xml');
	}

	if(type == "binary") {
		xhr.responseType = "arraybuffer";
	}

	xhr.send();

	function handler() {
		if (this.readyState === this.DONE) {
			if (this.status === 200 || (this.status === 0 && this.response) ) { // Android & Firefox reporting 0 for local & blob urls
				var r;

				if(type == 'xml'){
					r = this.responseXML;
				}else
				if(type == 'json'){
					r = JSON.parse(this.response);
				}else
				if(type == 'blob'){

					if(supportsURL) {
						r = this.response;
					} else {
						//-- Safari doesn't support responseType blob, so create a blob from arraybuffer
						r = new Blob([this.response]);
					}

				}else{
					r = this.response;
				}

				deferred.resolve(r);
			} else {
				deferred.reject({
					message : this.response,
					stack : new Error().stack
				});
			}
		}
	}

	return deferred.promise;
};

EPUBJS.core.toArray = function(obj) {
	var arr = [];

	for (var member in obj) {
		var newitm;
		if ( obj.hasOwnProperty(member) ) {
			newitm = obj[member];
			newitm.ident = member;
			arr.push(newitm);
		}
	}

	return arr;
};

//-- Parse the different parts of a url, returning a object
EPUBJS.core.uri = function(url){
	var uri = {
				protocol : '',
				host : '',
				path : '',
				origin : '',
				directory : '',
				base : '',
				filename : '',
				extension : '',
				fragment : '',
				href : url
			},
			blob = url.indexOf('blob:'),
			doubleSlash = url.indexOf('://'),
			search = url.indexOf('?'),
			fragment = url.indexOf("#"),
			withoutProtocol,
			dot,
			firstSlash;

	if(blob === 0) {
		uri.protocol = "blob";
		uri.base = url.indexOf(0, fragment);
		return uri;
	}

	if(fragment != -1) {
		uri.fragment = url.slice(fragment + 1);
		url = url.slice(0, fragment);
	}

	if(search != -1) {
		uri.search = url.slice(search + 1);
		url = url.slice(0, search);
		href = url;
	}

	if(doubleSlash != -1) {
		uri.protocol = url.slice(0, doubleSlash);
		withoutProtocol = url.slice(doubleSlash+3);
		firstSlash = withoutProtocol.indexOf('/');

		if(firstSlash === -1) {
			uri.host = uri.path;
			uri.path = "";
		} else {
			uri.host = withoutProtocol.slice(0, firstSlash);
			uri.path = withoutProtocol.slice(firstSlash);
		}


		uri.origin = uri.protocol + "://" + uri.host;

		uri.directory = EPUBJS.core.folder(uri.path);

		uri.base = uri.origin + uri.directory;
		// return origin;
	} else {
		uri.path = url;
		uri.directory = EPUBJS.core.folder(url);
		uri.base = uri.directory;
	}

	//-- Filename
	uri.filename = url.replace(uri.base, '');
	dot = uri.filename.lastIndexOf('.');
	if(dot != -1) {
		uri.extension = uri.filename.slice(dot+1);
	}
	return uri;
};

//-- Parse out the folder, will return everything before the last slash

EPUBJS.core.folder = function(url){

	var lastSlash = url.lastIndexOf('/');

	if(lastSlash == -1) var folder = '';

	folder = url.slice(0, lastSlash + 1);

	return folder;

};

//-- https://github.com/ebidel/filer.js/blob/master/src/filer.js#L128
EPUBJS.core.dataURLToBlob = function(dataURL) {
	var BASE64_MARKER = ';base64,',
		parts, contentType, raw, rawLength, uInt8Array;

	if (dataURL.indexOf(BASE64_MARKER) == -1) {
		parts = dataURL.split(',');
		contentType = parts[0].split(':')[1];
		raw = parts[1];

		return new Blob([raw], {type: contentType});
	}

	parts = dataURL.split(BASE64_MARKER);
	contentType = parts[0].split(':')[1];
	raw = window.atob(parts[1]);
	rawLength = raw.length;

	uInt8Array = new Uint8Array(rawLength);

	for (var i = 0; i < rawLength; ++i) {
		uInt8Array[i] = raw.charCodeAt(i);
	}

	return new Blob([uInt8Array], {type: contentType});
};

//-- Load scripts async: http://stackoverflow.com/questions/7718935/load-scripts-asynchronously
EPUBJS.core.addScript = function(src, callback, target) {
	var s, r;
	r = false;
	s = document.createElement('script');
	s.type = 'text/javascript';
	s.async = false;
	s.src = src;
	s.onload = s.onreadystatechange = function() {
		if ( !r && (!this.readyState || this.readyState == 'complete') ) {
			r = true;
			if(callback) callback();
		}
	};
	target = target || document.body;
	target.appendChild(s);
};

EPUBJS.core.addScripts = function(srcArr, callback, target) {
	var total = srcArr.length,
		curr = 0,
		cb = function(){
			curr++;
			if(total == curr){
				if(callback) callback();
			}else{
				EPUBJS.core.addScript(srcArr[curr], cb, target);
			}
		};

	EPUBJS.core.addScript(srcArr[curr], cb, target);
};

EPUBJS.core.addCss = function(src, callback, target) {
	var s, r;
	r = false;
	s = document.createElement('link');
	s.type = 'text/css';
	s.rel = "stylesheet";
	s.href = src;
	s.onload = s.onreadystatechange = function() {
		if ( !r && (!this.readyState || this.readyState == 'complete') ) {
			r = true;
			if(callback) callback();
		}
	};
	target = target || document.body;
	target.appendChild(s);
};

EPUBJS.core.prefixed = function(unprefixed) {
	var vendors = ["Webkit", "Moz", "O", "ms" ],
		prefixes = ['-Webkit-', '-moz-', '-o-', '-ms-'],
		upper = unprefixed[0].toUpperCase() + unprefixed.slice(1),
		length = vendors.length;

	if (typeof(document.documentElement.style[unprefixed]) != 'undefined') {
		return unprefixed;
	}

	for ( var i=0; i < length; i++ ) {
		if (typeof(document.documentElement.style[vendors[i] + upper]) != 'undefined') {
			return vendors[i] + upper;
		}
	}

	return unprefixed;
};

EPUBJS.core.resolveUrl = function(base, path) {
	var url,
		segments = [],
		uri = EPUBJS.core.uri(path),
		folders = base.split("/"),
		paths;

	if(uri.host) {
		return path;
	}

	folders.pop();

	paths = path.split("/");
	paths.forEach(function(p){
		if(p === ".."){
			folders.pop();
		}else{
			segments.push(p);
		}
	});

	url = folders.concat(segments);

	return url.join("/");
};

// http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript
EPUBJS.core.uuid = function() {
	var d = new Date().getTime();
	var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
			var r = (d + Math.random()*16)%16 | 0;
			d = Math.floor(d/16);
			return (c=='x' ? r : (r&0x7|0x8)).toString(16);
	});
	return uuid;
};

// Fast quicksort insert for sorted array -- based on:
// http://stackoverflow.com/questions/1344500/efficient-way-to-insert-a-number-into-a-sorted-array-of-numbers
EPUBJS.core.insert = function(item, array, compareFunction) {
	var location = EPUBJS.core.locationOf(item, array, compareFunction);
	array.splice(location, 0, item);

	return location;
};

EPUBJS.core.locationOf = function(item, array, compareFunction, _start, _end) {
	var start = _start || 0;
	var end = _end || array.length;
	var pivot = parseInt(start + (end - start) / 2);
	var compared;
	if(!compareFunction){
		compareFunction = function(a, b) {
			if(a > b) return 1;
			if(a < b) return -1;
			if(a = b) return 0;
		};
	}
	if(end-start <= 0) {
		return pivot;
	}

	compared = compareFunction(array[pivot], item);
	if(end-start === 1) {
		return compared > 0 ? pivot : pivot + 1;
	}

	if(compared === 0) {
		return pivot;
	}
	if(compared === -1) {
		return EPUBJS.core.locationOf(item, array, compareFunction, pivot, end);
	} else{
		return EPUBJS.core.locationOf(item, array, compareFunction, start, pivot);
	}
};

EPUBJS.core.indexOfSorted = function(item, array, compareFunction, _start, _end) {
	var start = _start || 0;
	var end = _end || array.length;
	var pivot = parseInt(start + (end - start) / 2);
	var compared;
	if(!compareFunction){
		compareFunction = function(a, b) {
			if(a > b) return 1;
			if(a < b) return -1;
			if(a = b) return 0;
		};
	}
	if(end-start <= 0) {
		return -1; // Not found
	}

	compared = compareFunction(array[pivot], item);
	if(end-start === 1) {
		return compared === 0 ? pivot : -1;
	}
	if(compared === 0) {
		return pivot; // Found
	}
	if(compared === -1) {
		return EPUBJS.core.indexOfSorted(item, array, compareFunction, pivot, end);
	} else{
		return EPUBJS.core.indexOfSorted(item, array, compareFunction, start, pivot);
	}
};


EPUBJS.core.queue = function(_scope){
	var _q = [];
	var scope = _scope;
	// Add an item to the queue
	var enqueue = function(funcName, args, context) {
		_q.push({
			"funcName" : funcName,
			"args"     : args,
			"context"  : context
		});
		return _q;
	};
	// Run one item
	var dequeue = function(){
		var inwait;
		if(_q.length) {
			inwait = _q.shift();
			// Defer to any current tasks
			// setTimeout(function(){
			scope[inwait.funcName].apply(inwait.context || scope, inwait.args);
			// }, 0);
		}
	};

	// Run All
	var flush = function(){
		while(_q.length) {
			dequeue();
		}
	};
	// Clear all items in wait
	var clear = function(){
		_q = [];
	};

	var length = function(){
		return _q.length;
	};

	return {
		"enqueue" : enqueue,
		"dequeue" : dequeue,
		"flush" : flush,
		"clear" : clear,
		"length" : length
	};
};

// From: https://code.google.com/p/fbug/source/browse/branches/firebug1.10/content/firebug/lib/xpath.js
/**
 * Gets an XPath for an element which describes its hierarchical location.
 */
EPUBJS.core.getElementXPath = function(element) {
	if (element && element.id) {
		return '//*[@id="' + element.id + '"]';
	} else {
		return EPUBJS.core.getElementTreeXPath(element);
	}
};

EPUBJS.core.getElementTreeXPath = function(element) {
	var paths = [];
	var 	isXhtml = (element.ownerDocument.documentElement.getAttribute('xmlns') === "http://www.w3.org/1999/xhtml");
	var index, nodeName, tagName, pathIndex;

	if(element.nodeType === Node.TEXT_NODE){
		// index = Array.prototype.indexOf.call(element.parentNode.childNodes, element) + 1;
		index = EPUBJS.core.indexOfTextNode(element) + 1;

		paths.push("text()["+index+"]");
		element = element.parentNode;
	}

	// Use nodeName (instead of localName) so namespace prefix is included (if any).
	for (; element && element.nodeType == 1; element = element.parentNode)
	{
		index = 0;
		for (var sibling = element.previousSibling; sibling; sibling = sibling.previousSibling)
		{
			// Ignore document type declaration.
			if (sibling.nodeType == Node.DOCUMENT_TYPE_NODE) {
				continue;
			}
			if (sibling.nodeName == element.nodeName) {
				++index;
			}
		}
		nodeName = element.nodeName.toLowerCase();
		tagName = (isXhtml ? "xhtml:" + nodeName : nodeName);
		pathIndex = (index ? "[" + (index+1) + "]" : "");
		paths.splice(0, 0, tagName + pathIndex);
	}

	return paths.length ? "./" + paths.join("/") : null;
};

EPUBJS.core.nsResolver = function(prefix) {
	var ns = {
		'xhtml' : 'http://www.w3.org/1999/xhtml',
		'epub': 'http://www.idpf.org/2007/ops'
	};
	return ns[prefix] || null;
};

//https://stackoverflow.com/questions/13482352/xquery-looking-for-text-with-single-quote/13483496#13483496
EPUBJS.core.cleanStringForXpath = function(str)  {
		var parts = str.match(/[^'"]+|['"]/g);
		parts = parts.map(function(part){
				if (part === "'")  {
						return '\"\'\"'; // output "'"
				}

				if (part === '"') {
						return "\'\"\'"; // output '"'
				}
				return "\'" + part + "\'";
		});
		return "concat(\'\'," + parts.join(",") + ")";
};

EPUBJS.core.indexOfTextNode = function(textNode){
	var parent = textNode.parentNode;
	var children = parent.childNodes;
	var sib;
	var index = -1;
	for (var i = 0; i < children.length; i++) {
		sib = children[i];
		if(sib.nodeType === Node.TEXT_NODE){
			index++;
		}
		if(sib == textNode) break;
	}

	return index;
};

// Underscore
EPUBJS.core.defaults = function(obj) {
  for (var i = 1, length = arguments.length; i < length; i++) {
    var source = arguments[i];
    for (var prop in source) {
      if (obj[prop] === void 0) obj[prop] = source[prop];
    }
  }
  return obj;
};

EPUBJS.core.extend = function(target) {
    var sources = [].slice.call(arguments, 1);
    sources.forEach(function (source) {
      if(!source) return;
      Object.getOwnPropertyNames(source).forEach(function(propName) {
        Object.defineProperty(target, propName, Object.getOwnPropertyDescriptor(source, propName));
      });
    });
    return target;
};

EPUBJS.core.clone = function(obj) {
  return EPUBJS.core.isArray(obj) ? obj.slice() : EPUBJS.core.extend({}, obj);
};

EPUBJS.core.isElement = function(obj) {
    return !!(obj && obj.nodeType == 1);
};

EPUBJS.core.isNumber = function(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
};

EPUBJS.core.isString = function(str) {
  return (typeof str === 'string' || str instanceof String);
};

EPUBJS.core.isArray = Array.isArray || function(obj) {
  return Object.prototype.toString.call(obj) === '[object Array]';
};

// Lodash
EPUBJS.core.values = function(object) {
	var index = -1;
	var props, length, result;

	if(!object) return [];

  props = Object.keys(object);
  length = props.length;
  result = Array(length);

  while (++index < length) {
    result[index] = object[props[index]];
  }
  return result;
};
EPUBJS.EpubCFI = function(cfiStr){
  if(cfiStr) return this.parse(cfiStr);
};

EPUBJS.EpubCFI.prototype.generateChapterComponent = function(_spineNodeIndex, _pos, id) {
  var pos = parseInt(_pos),
    spineNodeIndex = _spineNodeIndex + 1,
    cfi = '/'+spineNodeIndex+'/';

  cfi += (pos + 1) * 2;

  if(id) cfi += "[" + id + "]";

  //cfi += "!";

  return cfi;
};

EPUBJS.EpubCFI.prototype.generatePathComponent = function(steps) {
  var parts = [];

  steps.forEach(function(part){
    var segment = '';
    segment += (part.index + 1) * 2;

    if(part.id) {
      segment += "[" + part.id + "]";
    }

    parts.push(segment);
  });

  return parts.join('/');
};

EPUBJS.EpubCFI.prototype.generateCfiFromElement = function(element, chapter) {
  var steps = this.pathTo(element);
  var path = this.generatePathComponent(steps);
  if(!path.length) {
    // Start of Chapter
    return "epubcfi(" + chapter + "!/4/)";
  } else {
    // First Text Node
    return "epubcfi(" + chapter + "!" + path + "/1:0)";
  }
};

EPUBJS.EpubCFI.prototype.pathTo = function(node) {
  var stack = [],
      children;

  while(node && node.parentNode !== null && node.parentNode.nodeType != 9) {
    children = node.parentNode.children;

    stack.unshift({
      'id' : node.id,
      // 'classList' : node.classList,
      'tagName' : node.tagName,
      'index' : children ? Array.prototype.indexOf.call(children, node) : 0
    });

    node = node.parentNode;
  }

  return stack;
};

EPUBJS.EpubCFI.prototype.getChapterComponent = function(cfiStr) {

  var splitStr = cfiStr.split("!");

  return splitStr[0];
};

EPUBJS.EpubCFI.prototype.getPathComponent = function(cfiStr) {

  var splitStr = cfiStr.split("!");
  var pathComponent = splitStr[1] ? splitStr[1].split(":") : '';

  return pathComponent[0];
};

EPUBJS.EpubCFI.prototype.getCharecterOffsetComponent = function(cfiStr) {
  var splitStr = cfiStr.split(":");
  return splitStr[1] || '';
};


EPUBJS.EpubCFI.prototype.parse = function(cfiStr) {
  var cfi = {},
    chapSegment,
    chapterComponent,
    pathComponent,
    charecterOffsetComponent,
    assertion,
    chapId,
    path,
    end,
    endInt,
    text,
    parseStep = function(part){
      var type, index, has_brackets, id;

      type = "element";
      index = parseInt(part) / 2 - 1;
      has_brackets = part.match(/\[(.*)\]/);
      if(has_brackets && has_brackets[1]){
        id = has_brackets[1];
      }

      return {
        "type" : type,
        'index' : index,
        'id' : id || false
      };
    };

  if(typeof cfiStr !== "string") {
    return {spinePos: -1};
  }

  cfi.str = cfiStr;

  if(cfiStr.indexOf("epubcfi(") === 0 && cfiStr[cfiStr.length-1] === ")") {
    // Remove intial epubcfi( and ending )
    cfiStr = cfiStr.slice(8, cfiStr.length-1);
  }

  chapterComponent = this.getChapterComponent(cfiStr);
  pathComponent = this.getPathComponent(cfiStr) || '';
  charecterOffsetComponent = this.getCharecterOffsetComponent(cfiStr);
  // Make sure this is a valid cfi or return
  if(!chapterComponent) {
    return {spinePos: -1};
  }

  // Chapter segment is always the second one
  chapSegment = chapterComponent.split("/")[2] || '';
  if(!chapSegment) return {spinePos:-1};

  cfi.spinePos = (parseInt(chapSegment) / 2 - 1 ) || 0;

  chapId = chapSegment.match(/\[(.*)\]/);

  cfi.spineId = chapId ? chapId[1] : false;

  if(pathComponent.indexOf(',') != -1) {
    // Handle ranges -- not supported yet
    console.warn("CFI Ranges are not supported");
  }

  path = pathComponent.split('/');
  end = path.pop();

  cfi.steps = [];

  path.forEach(function(part){
    var step;

    if(part) {
      step = parseStep(part);
      cfi.steps.push(step);
    }
  });

  //-- Check if END is a text node or element
  endInt = parseInt(end);
  if(!isNaN(endInt)) {

    if(endInt % 2 === 0) { // Even = is an element
      cfi.steps.push(parseStep(end));
    } else {
      cfi.steps.push({
        "type" : "text",
        'index' : (endInt - 1 ) / 2
      });
    }

  }

  assertion = charecterOffsetComponent.match(/\[(.*)\]/);
  if(assertion && assertion[1]){
    cfi.characterOffset = parseInt(charecterOffsetComponent.split('[')[0]);
    // We arent handling these assertions yet
    cfi.textLocationAssertion = assertion[1];
  } else {
    cfi.characterOffset = parseInt(charecterOffsetComponent);
  }

  return cfi;
};

EPUBJS.EpubCFI.prototype.addMarker = function(cfi, _doc, _marker) {
  var doc = _doc || document;
  var marker = _marker || this.createMarker(doc);
  var parent;
  var lastStep;
  var text;
  var split;

  if(typeof cfi === 'string') {
    cfi = this.parse(cfi);
  }
  // Get the terminal step
  lastStep = cfi.steps[cfi.steps.length-1];

  // check spinePos
  if(cfi.spinePos === -1) {
    // Not a valid CFI
    return false;
  }

  // Find the CFI elements parent
  parent = this.findParent(cfi, doc);

  if(!parent) {
    // CFI didn't return an element
    // Maybe it isnt in the current chapter?
    return false;
  }

  if(lastStep && lastStep.type === "text") {
    text = parent.childNodes[lastStep.index];
    if(cfi.characterOffset){
      split = text.splitText(cfi.characterOffset);
      marker.classList.add("EPUBJS-CFI-SPLIT");
      parent.insertBefore(marker, split);
    } else {
      parent.insertBefore(marker, text);
    }
  } else {
    parent.insertBefore(marker, parent.firstChild);
  }

  return marker;
};

EPUBJS.EpubCFI.prototype.createMarker = function(_doc) {
  var doc = _doc || document;
  var element = doc.createElement('span');
  element.id = "EPUBJS-CFI-MARKER:"+ EPUBJS.core.uuid();
  element.classList.add("EPUBJS-CFI-MARKER");

  return element;
};

EPUBJS.EpubCFI.prototype.removeMarker = function(marker, _doc) {
  var doc = _doc || document;
  // var id = marker.id;

  // Cleanup textnodes if they were split
  if(marker.classList.contains("EPUBJS-CFI-SPLIT")){
    nextSib = marker.nextSibling;
    prevSib = marker.previousSibling;
    if(nextSib &&
        prevSib &&
        nextSib.nodeType === 3 &&
        prevSib.nodeType === 3){

      prevSib.textContent += nextSib.textContent;
      marker.parentNode.removeChild(nextSib);
    }
    marker.parentNode.removeChild(marker);
  } else if(marker.classList.contains("EPUBJS-CFI-MARKER")) {
    // Remove only elements added as markers
    marker.parentNode.removeChild(marker);
  }

};

EPUBJS.EpubCFI.prototype.findParent = function(cfi, _doc) {
  var doc = _doc || document,
      element = doc.getElementsByTagName('html')[0],
      children = Array.prototype.slice.call(element.children),
      num, index, part, sections,
      text, textBegin, textEnd;

  if(typeof cfi === 'string') {
    cfi = this.parse(cfi);
  }

  sections = cfi.steps.slice(0); // Clone steps array
  if(!sections.length) {
    return doc.getElementsByTagName('body')[0];
  }

  while(sections && sections.length > 0) {
    part = sections.shift();
    // Find textNodes Parent
    if(part.type === "text") {
      text = element.childNodes[part.index];
      element = text.parentNode || element;
    // Find element by id if present
    } else if(part.id){
      element = doc.getElementById(part.id);
    // Find element in parent
    }else{
      element = children[part.index];
    }
    // Element can't be found
    if(typeof element === "undefined") {
      console.error("No Element For", part, cfi.str);
      return false;
    }
    // Get current element children and continue through steps
    children = Array.prototype.slice.call(element.children);
  }

  return element;
};

EPUBJS.EpubCFI.prototype.compare = function(cfiOne, cfiTwo) {
  if(typeof cfiOne === 'string') {
    cfiOne = new EPUBJS.EpubCFI(cfiOne);
  }
  if(typeof cfiTwo === 'string') {
    cfiTwo = new EPUBJS.EpubCFI(cfiTwo);
  }
  // Compare Spine Positions
  if(cfiOne.spinePos > cfiTwo.spinePos) {
    return 1;
  }
  if(cfiOne.spinePos < cfiTwo.spinePos) {
    return -1;
  }


  // Compare Each Step in the First item
  for (var i = 0; i < cfiOne.steps.length; i++) {
    if(!cfiTwo.steps[i]) {
      return 1;
    }
    if(cfiOne.steps[i].index > cfiTwo.steps[i].index) {
      return 1;
    }
    if(cfiOne.steps[i].index < cfiTwo.steps[i].index) {
      return -1;
    }
    // Otherwise continue checking
  }

  // All steps in First present in Second
  if(cfiOne.steps.length < cfiTwo.steps.length) {
    return -1;
  }

  // Compare the charecter offset of the text node
  if(cfiOne.characterOffset > cfiTwo.characterOffset) {
    return 1;
  }
  if(cfiOne.characterOffset < cfiTwo.characterOffset) {
    return -1;
  }

  // CFI's are equal
  return 0;
};

EPUBJS.EpubCFI.prototype.generateCfiFromHref = function(href, book) {
  var uri = EPUBJS.core.uri(href);
  var path = uri.path;
  var fragment = uri.fragment;
  var spinePos = book.spineIndexByURL[path];
  var loaded;
  var deferred = new RSVP.defer();
  var epubcfi = new EPUBJS.EpubCFI();
  var spineItem;

  if(typeof spinePos !== "undefined"){
    spineItem = book.spine[spinePos];
    loaded = book.loadXml(spineItem.url);
    loaded.then(function(doc){
      var element = doc.getElementById(fragment);
      var cfi;
      cfi = epubcfi.generateCfiFromElement(element, spineItem.cfiBase);
      deferred.resolve(cfi);
    });
  }

  return deferred.promise;
};

EPUBJS.EpubCFI.prototype.generateCfiFromTextNode = function(anchor, offset, base) {
  var parent = anchor.parentNode;
  var steps = this.pathTo(parent);
  var path = this.generatePathComponent(steps);
  var index = 1 + (2 * Array.prototype.indexOf.call(parent.childNodes, anchor));
  return "epubcfi(" + base + "!" + path + "/"+index+":"+(offset || 0)+")";
};

EPUBJS.EpubCFI.prototype.generateCfiFromRangeAnchor = function(range, base) {
  var anchor = range.anchorNode;
  var offset = range.anchorOffset;
  return this.generateCfiFromTextNode(anchor, offset, base);
};

EPUBJS.EpubCFI.prototype.generateCfiFromRange = function(range, base) {
  var start, startElement, startSteps, startPath, startOffset, startIndex;
  var end, endElement, endSteps, endPath, endOffset, endIndex;

  start = range.startContainer;

  if(start.nodeType === 3) { // text node
    startElement = start.parentNode;
    //startIndex = 1 + (2 * Array.prototype.indexOf.call(startElement.childNodes, start));
    startIndex = 1 + (2 * EPUBJS.core.indexOfTextNode(start));
    startSteps = this.pathTo(startElement);
  } else if(range.collapsed) {
    return this.generateCfiFromElement(start, base); // single element
  } else {
    startSteps = this.pathTo(start);
  }

  startPath = this.generatePathComponent(startSteps);
  startOffset = range.startOffset;

  if(!range.collapsed) {
    end = range.endContainer;

    if(end.nodeType === 3) { // text node
      endElement = end.parentNode;
      // endIndex = 1 + (2 * Array.prototype.indexOf.call(endElement.childNodes, end));
      endIndex = 1 + (2 * EPUBJS.core.indexOfTextNode(end));

      endSteps = this.pathTo(endElement);
    } else {
      endSteps = this.pathTo(end);
    }

    endPath = this.generatePathComponent(endSteps);
    endOffset = range.endOffset;

    // Remove steps present in startPath
    endPath = endPath.replace(startPath, '');

    if (endPath.length) {
      endPath = endPath + "/";
    }

    return "epubcfi(" + base + "!" + startPath + "/" + startIndex + ":" + startOffset + "," + endPath + endIndex + ":" + endOffset + ")";

  } else {
    return "epubcfi(" + base + "!" + startPath + "/"+ startIndex +":"+ startOffset +")";
  }
};

EPUBJS.EpubCFI.prototype.generateXpathFromSteps = function(steps) {
  var xpath = [".", "*"];

  steps.forEach(function(step){
    var position = step.index + 1;

    if(step.id){
      xpath.push("*[position()=" + position + " and @id='" + step.id + "']");
    } else if(step.type === "text") {
      xpath.push("text()[" + position + "]");
    } else {
      xpath.push("*[" + position + "]");
    }
  });

  return xpath.join("/");
};

EPUBJS.EpubCFI.prototype.generateQueryFromSteps = function(steps) {
  var query = ["html"];

  steps.forEach(function(step){
    var position = step.index + 1;

    if(step.id){
      query.push("#" + step.id);
    } else if(step.type === "text") {
      // unsupported in querySelector
      // query.push("text()[" + position + "]");
    } else {
      query.push("*:nth-child(" + position + ")");
    }
  });

  return query.join(">");
};


EPUBJS.EpubCFI.prototype.generateRangeFromCfi = function(cfi, _doc) {
  var doc = _doc || document;
  var range = doc.createRange();
  var lastStep;
  var xpath;
  var startContainer;
  var textLength;
  var query;
  var startContainerParent;

  if(typeof cfi === 'string') {
    cfi = this.parse(cfi);
  }

  // check spinePos
  if(cfi.spinePos === -1) {
    // Not a valid CFI
    return false;
  }

  // Get the terminal step
  lastStep = cfi.steps[cfi.steps.length-1];

  if(typeof document.evaluate != 'undefined') {
    xpath = this.generateXpathFromSteps(cfi.steps);
    startContainer = doc.evaluate(xpath, doc, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
  } else {
      // Get the query string
      query = this.generateQueryFromSteps(cfi.steps);
      // Find the containing element
      startContainerParent = doc.querySelector(query);
      // Find the text node within that element
      if(startContainerParent && lastStep.type == "text") {
        startContainer = startContainerParent.childNodes[lastStep.index];
      }
  }

  if(!startContainer) {
    return null;
  }

  if(startContainer && cfi.characterOffset >= 0) {
    textLength = startContainer.length;

    if(cfi.characterOffset < textLength) {
      range.setStart(startContainer, cfi.characterOffset);
      range.setEnd(startContainer, textLength );
    } else {
      console.debug("offset greater than length:", cfi.characterOffset, textLength);
      range.setStart(startContainer, textLength - 1 );
      range.setEnd(startContainer, textLength );
    }
  } else if(startContainer) {
    range.selectNode(startContainer);
  }
  // doc.defaultView.getSelection().addRange(range);
  return range;
};

EPUBJS.EpubCFI.prototype.isCfiString = function(target) {
  if(typeof target === "string" &&
    target.indexOf("epubcfi(") === 0) {
      return true;
  }

  return false;
};

EPUBJS.Events = function(obj, el){
	
	this.events = {};
	
	if(!el){
		this.el = document.createElement('div');
	}else{
		this.el = el;
	}
	
	obj.createEvent = this.createEvent;
	obj.tell = this.tell;
	obj.listen = this.listen;
	obj.deafen = this.deafen;
	obj.listenUntil = this.listenUntil;
	
	return this;
};

EPUBJS.Events.prototype.createEvent = function(evt){
	var e = new CustomEvent(evt);
	this.events[evt] = e;
	return e;
};

EPUBJS.Events.prototype.tell = function(evt, msg){
	var e;

	if(!this.events[evt]){
		console.warn("No event:", evt, "defined yet, creating.");
		e = this.createEvent(evt);
	}else{
		e = this.events[evt];
	}

	if(msg) e.msg = msg;
	this.el.dispatchEvent(e);

};

EPUBJS.Events.prototype.listen = function(evt, func, bindto){
	if(!this.events[evt]){
		console.warn("No event:", evt, "defined yet, creating.");
		this.createEvent(evt);
		return;
	}

	if(bindto){
		this.el.addEventListener(evt, func.bind(bindto), false);
	}else{
		this.el.addEventListener(evt, func, false);
	}

};

EPUBJS.Events.prototype.deafen = function(evt, func){
	this.el.removeEventListener(evt, func, false);
};

EPUBJS.Events.prototype.listenUntil = function(OnEvt, OffEvt, func, bindto){
	this.listen(OnEvt, func, bindto);
	
	function unlisten(){
		this.deafen(OnEvt, func);
		this.deafen(OffEvt, unlisten);
	}
	
	this.listen(OffEvt, unlisten, this);
};
EPUBJS.hooks = {};
EPUBJS.Hooks = (function(){
	function hooks(){}

	//-- Get pre-registered hooks
	hooks.prototype.getHooks = function(){
		var plugs;
		this.hooks = {};
		Array.prototype.slice.call(arguments).forEach(function(arg){
			this.hooks[arg] = [];
		}, this);

		for (var plugType in this.hooks) {
			plugs = EPUBJS.core.values(EPUBJS.hooks[plugType]);

			plugs.forEach(function(hook){
				this.registerHook(plugType, hook);
			}, this);
		}
	};

	//-- Hooks allow for injecting async functions that must all complete before continuing
	//   Functions must have a callback as their first argument.
	hooks.prototype.registerHook = function(type, toAdd, toFront){

		if(typeof(this.hooks[type]) != "undefined"){

			if(typeof(toAdd) === "function"){
				if(toFront) {
					this.hooks[type].unshift(toAdd);
				}else{
					this.hooks[type].push(toAdd);
				}
			}else if(Array.isArray(toAdd)){
				toAdd.forEach(function(hook){
					if(toFront) {
						this.hooks[type].unshift(hook);
					}else{
						this.hooks[type].push(hook);
					}
				}, this);
			}
		}else{
			//-- Allows for undefined hooks
			this.hooks[type] = [toAdd];

			if(typeof(toAdd) === "function"){
				this.hooks[type] = [toAdd];
			}else if(Array.isArray(toAdd)){
				this.hooks[type] = [];
				toAdd.forEach(function(hook){
					this.hooks[type].push(hook);
				}, this);
			}

		}
	};

	hooks.prototype.removeHook = function(type, toRemove){
		var index;

		if(typeof(this.hooks[type]) != "undefined"){

			if(typeof(toRemove) === "function"){
				index = this.hooks[type].indexOf(toRemove);
				if (index > -1) {
					this.hooks[type].splice(index, 1);
				}
			}else if(Array.isArray(toRemove)){
				toRemove.forEach(function(hook){
					index = this.hooks[type].indexOf(hook);
					if (index > -1) {
						this.hooks[type].splice(index, 1);
					}
				}, this);
			}
		}
	};

	hooks.prototype.triggerHooks = function(type, callback, passed){
		var hooks, count;

		if(typeof(this.hooks[type]) == "undefined") return false;

		hooks = this.hooks[type];

		count = hooks.length;
		if(count === 0 && callback) {
			callback();
		}

		function countdown(){
			count--;
			if(count <= 0 && callback) callback();
		}

		hooks.forEach(function(hook){
			hook(countdown, passed);
		});
	};

	return {
		register: function(name) {
			if(EPUBJS.hooks[name] === undefined) { EPUBJS.hooks[name] = {}; }
			if(typeof EPUBJS.hooks[name] !== 'object') { throw "Already registered: "+name; }
			return EPUBJS.hooks[name];
		},
		mixin: function(object) {
			for (var prop in hooks.prototype) {
				object[prop] = hooks.prototype[prop];
			}
		}
	};
})();

EPUBJS.Layout = EPUBJS.Layout || {};

EPUBJS.Layout.Reflowable = function(){
	this.documentElement = null;
	this.spreadWidth = null;
};

EPUBJS.Layout.Reflowable.prototype.format = function(documentElement, _width, _height, _gap){
	// Get the prefixed CSS commands
	var columnAxis = EPUBJS.core.prefixed('columnAxis');
	var columnGap = EPUBJS.core.prefixed('columnGap');
	var columnWidth = EPUBJS.core.prefixed('columnWidth');
	var columnFill = EPUBJS.core.prefixed('columnFill');

	//-- Check the width and create even width columns
	var width = Math.floor(_width);
	// var width = (fullWidth % 2 === 0) ? fullWidth : fullWidth - 0; // Not needed for single
	var section = Math.floor(width / 8);
	var gap = (_gap >= 0) ? _gap : ((section % 2 === 0) ? section : section - 1);
	this.documentElement = documentElement;
	//-- Single Page
	this.spreadWidth = (width + gap);


	documentElement.style.overflow = "hidden";

	// Must be set to the new calculated width or the columns will be off
	documentElement.style.width = width + "px";

	//-- Adjust height
	documentElement.style.height = _height + "px";

	//-- Add columns
	documentElement.style[columnAxis] = "horizontal";
	documentElement.style[columnFill] = "auto";
	documentElement.style[columnWidth] = width+"px";
	documentElement.style[columnGap] = gap+"px";
	this.colWidth = width;
	this.gap = gap;

	return {
		pageWidth : this.spreadWidth,
		pageHeight : _height
	};
};

EPUBJS.Layout.Reflowable.prototype.calculatePages = function() {
	var totalWidth, displayedPages;
	this.documentElement.style.width = "auto"; //-- reset width for calculations
	totalWidth = this.documentElement.scrollWidth;
	displayedPages = Math.ceil(totalWidth / this.spreadWidth);

	return {
		displayedPages : displayedPages,
		pageCount : displayedPages
	};
};

EPUBJS.Layout.ReflowableSpreads = function(){
	this.documentElement = null;
	this.spreadWidth = null;
};

EPUBJS.Layout.ReflowableSpreads.prototype.format = function(documentElement, _width, _height, _gap){
	var columnAxis = EPUBJS.core.prefixed('columnAxis');
	var columnGap = EPUBJS.core.prefixed('columnGap');
	var columnWidth = EPUBJS.core.prefixed('columnWidth');
	var columnFill = EPUBJS.core.prefixed('columnFill');

	var divisor = 2,
			cutoff = 800;

	//-- Check the width and create even width columns
	var fullWidth = Math.floor(_width);
	var width = (fullWidth % 2 === 0) ? fullWidth : fullWidth - 1;

	var section = Math.floor(width / 8);
	var gap = (_gap >= 0) ? _gap : ((section % 2 === 0) ? section : section - 1);

	//-- Double Page
	var colWidth = Math.floor((width - gap) / divisor);

	this.documentElement = documentElement;
	this.spreadWidth = (colWidth + gap) * divisor;


	documentElement.style.overflow = "hidden";

	// Must be set to the new calculated width or the columns will be off
	documentElement.style.width = width + "px";

	//-- Adjust height
	documentElement.style.height = _height + "px";

	//-- Add columns
	documentElement.style[columnAxis] = "horizontal";
	documentElement.style[columnFill] = "auto";
	documentElement.style[columnGap] = gap+"px";
	documentElement.style[columnWidth] = colWidth+"px";

	this.colWidth = colWidth;
	this.gap = gap;
	return {
		pageWidth : this.spreadWidth,
		pageHeight : _height
	};
};

EPUBJS.Layout.ReflowableSpreads.prototype.calculatePages = function() {
	var totalWidth = this.documentElement.scrollWidth;
	var displayedPages = Math.ceil(totalWidth / this.spreadWidth);

	//-- Add a page to the width of the document to account an for odd number of pages
	this.documentElement.style.width = ((displayedPages * this.spreadWidth) - this.gap) + "px";

	return {
		displayedPages : displayedPages,
		pageCount : displayedPages * 2
	};
};

EPUBJS.Layout.Fixed = function(){
	this.documentElement = null;
};

EPUBJS.Layout.Fixed.prototype.format = function(documentElement, _width, _height, _gap){
	var columnWidth = EPUBJS.core.prefixed('columnWidth');
	var viewport = documentElement.querySelector("[name=viewport]");
	var content;
	var contents;
	var width, height;
	this.documentElement = documentElement;
	/**
	* check for the viewport size
	* <meta name="viewport" content="width=1024,height=697" />
	*/
	if(viewport && viewport.hasAttribute("content")) {
		content = viewport.getAttribute("content");
		contents = content.split(',');
		if(contents[0]){
			width = contents[0].replace("width=", '');
		}
		if(contents[1]){
			height = contents[1].replace("height=", '');
		}
	}

	//-- Adjust width and height
	documentElement.style.width =  width + "px" || "auto";
	documentElement.style.height =  height + "px" || "auto";

	//-- Remove columns
	documentElement.style[columnWidth] = "auto";

	//-- Scroll
	documentElement.style.overflow = "auto";

	this.colWidth = width;
	this.gap = 0;

	return {
		pageWidth : width,
		pageHeight : height
	};

};

EPUBJS.Layout.Fixed.prototype.calculatePages = function(){
	return {
		displayedPages : 1,
		pageCount : 1
	};
};

EPUBJS.Locations = function(spine, store) {
  this.spine = spine;
  this.store = store;

  this.epubcfi = new EPUBJS.EpubCFI();

  this._locations = [];
  this.total = 0;

  this.break = 150;

  this._current = 0;

};

EPUBJS.Locations.prototype.generate = function(chars) {
	var deferred = new RSVP.defer();
	var spinePos = -1;
	var spineLength = this.spine.length;
	var nextChapter = function(deferred){
		var chapter;
		var next = spinePos + 1;
		var done = deferred || new RSVP.defer();
		var loaded;
		if(next >= spineLength) {
			done.resolve();
		} else {
			spinePos = next;
			chapter = new EPUBJS.Chapter(this.spine[spinePos], this.store);

      this.process(chapter).then(function() {
        // Load up the next chapter
				setTimeout(function(){
					nextChapter(done);
				}, 1);

      });
		}
		return done.promise;
	}.bind(this);

	var finished = nextChapter().then(function(){
    this.total = this._locations.length-1;

    if (this._currentCfi) {
      this.currentLocation = this._currentCfi;
    }
		deferred.resolve(this._locations);
	}.bind(this));

	return deferred.promise;
};

EPUBJS.Locations.prototype.process = function(chapter) {
  return chapter.load(this.request)
    .then(function(_doc) {

      var range;
      var doc = _doc;
      var contents = doc.documentElement.querySelector("body");
      var counter = 0;
      var prev;

      this.sprint(contents, function(node) {
        var len = node.length;
        var dist;
        var pos = 0;

        // Start range
        if (counter === 0) {
          range = doc.createRange();
          range.setStart(node, 0);
        }

        dist = this.break - counter;

        // Node is smaller than a break
        if(dist > len){
          counter += len;
          pos = len;
        }

        while (pos < len) {
          counter = this.break;
          pos += this.break;

          // Gone over
          if(pos >= len){
            // Continue counter for next node
            counter = len - (pos - this.break);

          // At End
          } else {
            // End the previous range
            range.setEnd(node, pos);
            cfi = chapter.cfiFromRange(range);
            this._locations.push(cfi);
            counter = 0;

            // Start new range
            pos += 1;
            range = doc.createRange();
            range.setStart(node, pos);
          }

        }

        prev = node;

      }.bind(this));

      // Close remaining
      if (range) {
        range.setEnd(prev, prev.length);
        cfi = chapter.cfiFromRange(range);
        this._locations.push(cfi);
        counter = 0;
      }

    }.bind(this));

};

EPUBJS.Locations.prototype.sprint = function(root, func) {
	var treeWalker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, null, false);

	while ((node = treeWalker.nextNode())) {
		func(node);
	}

};

EPUBJS.Locations.prototype.locationFromCfi = function(cfi){
  // Check if the location has not been set yet
	if(this._locations.length === 0) {
		return -1;
	}

  return EPUBJS.core.locationOf(cfi, this._locations, this.epubcfi.compare);
};

EPUBJS.Locations.prototype.percentageFromCfi = function(cfi) {
  // Find closest cfi
  var loc = this.locationFromCfi(cfi);
  // Get percentage in total
  return this.percentageFromLocation(loc);
};

EPUBJS.Locations.prototype.percentageFromLocation = function(loc) {
  if (!loc || !this.total) {
    return 0;
  }
  return (loc / this.total);
};

EPUBJS.Locations.prototype.cfiFromLocation = function(loc){
	var cfi = -1;
	// check that pg is an int
	if(typeof loc != "number"){
		loc = parseInt(loc);
	}

	if(loc >= 0 && loc < this._locations.length) {
		cfi = this._locations[loc];
	}

	return cfi;
};

EPUBJS.Locations.prototype.cfiFromPercentage = function(value){
  var percentage = (value > 1) ? value / 100 : value; // Normalize value to 0-1
	var loc = Math.ceil(this.total * percentage);

	return this.cfiFromLocation(loc);
};

EPUBJS.Locations.prototype.load = function(locations){
	this._locations = JSON.parse(locations);
  this.total = this._locations.length-1;
  return this._locations;
};

EPUBJS.Locations.prototype.save = function(json){
	return JSON.stringify(this._locations);
};

EPUBJS.Locations.prototype.getCurrent = function(json){
	return this._current;
};

EPUBJS.Locations.prototype.setCurrent = function(curr){
  var loc;

  if(typeof curr == "string"){
    this._currentCfi = curr;
  } else if (typeof curr == "number") {
    this._current = curr;
  } else {
    return;
  }

  if(this._locations.length === 0) {
    return;
	}

  if(typeof curr == "string"){
    loc = this.locationFromCfi(curr);
    this._current = loc;
  } else {
    loc = curr;
  }

  this.trigger("changed", {
    percentage: this.percentageFromLocation(loc)
  });
};

Object.defineProperty(EPUBJS.Locations.prototype, 'currentLocation', {
  get: function () {
    return this._current;
  },
  set: function (curr) {
    this.setCurrent(curr);
  }
});

RSVP.EventTarget.mixin(EPUBJS.Locations.prototype);

EPUBJS.Pagination = function(pageList) {
	this.pages = [];
	this.locations = [];
	this.epubcfi = new EPUBJS.EpubCFI();
	if(pageList && pageList.length) {
		this.process(pageList);
	}
};

EPUBJS.Pagination.prototype.process = function(pageList){
	pageList.forEach(function(item){
		this.pages.push(item.page);
		this.locations.push(item.cfi);
	}, this);
	
	this.pageList = pageList;
	this.firstPage = parseInt(this.pages[0]);
	this.lastPage = parseInt(this.pages[this.pages.length-1]);
	this.totalPages = this.lastPage - this.firstPage;
};

EPUBJS.Pagination.prototype.pageFromCfi = function(cfi){
	var pg = -1;
	
	// Check if the pageList has not been set yet
	if(this.locations.length === 0) {
		return -1;
	}
	
	// TODO: check if CFI is valid?

	// check if the cfi is in the location list
	// var index = this.locations.indexOf(cfi);
	var index = EPUBJS.core.indexOfSorted(cfi, this.locations, this.epubcfi.compare);
	if(index != -1 && index < (this.pages.length-1) ) {
		pg = this.pages[index];
	} else {
		// Otherwise add it to the list of locations
		// Insert it in the correct position in the locations page
		//index = EPUBJS.core.insert(cfi, this.locations, this.epubcfi.compare);
		index = EPUBJS.core.locationOf(cfi, this.locations, this.epubcfi.compare);
		// Get the page at the location just before the new one, or return the first
		pg = index-1 >= 0 ? this.pages[index-1] : this.pages[0];
		if(pg !== undefined) {
			// Add the new page in so that the locations and page array match up
			//this.pages.splice(index, 0, pg);
		} else {
			pg = -1;
		}

	}
	return pg;
};

EPUBJS.Pagination.prototype.cfiFromPage = function(pg){
	var cfi = -1;
	// check that pg is an int
	if(typeof pg != "number"){
		pg = parseInt(pg);
	}

	// check if the cfi is in the page list
	// Pages could be unsorted.
	var index = this.pages.indexOf(pg);
	if(index != -1) {
		cfi = this.locations[index];
	}
	// TODO: handle pages not in the list
	return cfi;
};

EPUBJS.Pagination.prototype.pageFromPercentage = function(percent){
	var pg = Math.round(this.totalPages * percent);
	return pg;
};

// Returns a value between 0 - 1 corresponding to the location of a page
EPUBJS.Pagination.prototype.percentageFromPage = function(pg){
	var percentage = (pg - this.firstPage) / this.totalPages;
	return Math.round(percentage * 1000) / 1000;
};

// Returns a value between 0 - 1 corresponding to the location of a cfi
EPUBJS.Pagination.prototype.percentageFromCfi = function(cfi){
	var pg = this.pageFromCfi(cfi);
	var percentage = this.percentageFromPage(pg);
	return percentage;
};
EPUBJS.Parser = function(baseUrl){
	this.baseUrl = baseUrl || '';
};

EPUBJS.Parser.prototype.container = function(containerXml){
		//-- <rootfile full-path="OPS/package.opf" media-type="application/oebps-package+xml"/>
		var rootfile, fullpath, folder, encoding;

		if(!containerXml) {
			console.error("Container File Not Found");
			return;
		}

		rootfile = containerXml.querySelector("rootfile");

		if(!rootfile) {
			console.error("No RootFile Found");
			return;
		}

		fullpath = rootfile.getAttribute('full-path');
		folder = EPUBJS.core.uri(fullpath).directory;
		encoding = containerXml.xmlEncoding;

		//-- Now that we have the path we can parse the contents
		return {
			'packagePath' : fullpath,
			'basePath' : folder,
			'encoding' : encoding
		};
};

EPUBJS.Parser.prototype.identifier = function(packageXml){
	var metadataNode;

	if(!packageXml) {
		console.error("Package File Not Found");
		return;
	}

	metadataNode = packageXml.querySelector("metadata");

	if(!metadataNode) {
		console.error("No Metadata Found");
		return;
	}

	return this.getElementText(metadataNode, "identifier");
};

EPUBJS.Parser.prototype.packageContents = function(packageXml, baseUrl){
	var parse = this;
	var metadataNode, manifestNode, spineNode;
	var manifest, navPath, tocPath, coverPath;
	var spineNodeIndex;
	var spine;
	var spineIndexByURL;
	var metadata;

	if(baseUrl) this.baseUrl = baseUrl;

	if(!packageXml) {
		console.error("Package File Not Found");
		return;
	}

	metadataNode = packageXml.querySelector("metadata");
	if(!metadataNode) {
		console.error("No Metadata Found");
		return;
	}

	manifestNode = packageXml.querySelector("manifest");
	if(!manifestNode) {
		console.error("No Manifest Found");
		return;
	}

	spineNode = packageXml.querySelector("spine");
	if(!spineNode) {
		console.error("No Spine Found");
		return;
	}

	manifest = parse.manifest(manifestNode);
	navPath = parse.findNavPath(manifestNode);
	tocPath = parse.findTocPath(manifestNode, spineNode);
	coverPath = parse.findCoverPath(manifestNode);

	spineNodeIndex = Array.prototype.indexOf.call(spineNode.parentNode.childNodes, spineNode);

	spine = parse.spine(spineNode, manifest);

	spineIndexByURL = {};
	spine.forEach(function(item){
		spineIndexByURL[item.href] = item.index;
	});

	metadata = parse.metadata(metadataNode);

	metadata.direction = spineNode.getAttribute("page-progression-direction");

	return {
		'metadata' : metadata,
		'spine'    : spine,
		'manifest' : manifest,
		'navPath'  : navPath,
		'tocPath'  : tocPath,
		'coverPath': coverPath,
		'spineNodeIndex' : spineNodeIndex,
		'spineIndexByURL' : spineIndexByURL
	};
};

//-- Find TOC NAV
EPUBJS.Parser.prototype.findNavPath = function(manifestNode){
	// Find item with property 'nav'
	// Should catch nav irregardless of order
  var node = manifestNode.querySelector("item[properties$='nav'], item[properties^='nav '], item[properties*=' nav ']");
  return node ? node.getAttribute('href') : false;
};

//-- Find TOC NCX: media-type="application/x-dtbncx+xml" href="toc.ncx"
EPUBJS.Parser.prototype.findTocPath = function(manifestNode, spineNode){
	var node = manifestNode.querySelector("item[media-type='application/x-dtbncx+xml']");
	var tocId;

	// If we can't find the toc by media-type then try to look for id of the item in the spine attributes as
	// according to http://www.idpf.org/epub/20/spec/OPF_2.0.1_draft.htm#Section2.4.1.2,
	// "The item that describes the NCX must be referenced by the spine toc attribute."
	if (!node) {
		tocId = spineNode.getAttribute("toc");
		if(tocId) {
			node = manifestNode.querySelector("item[id='" + tocId + "']");
		}
	}

	return node ? node.getAttribute('href') : false;
};

//-- Find Cover: <item properties="cover-image" id="ci" href="cover.svg" media-type="image/svg+xml" />
EPUBJS.Parser.prototype.findCoverPath = function(manifestNode){
	var node = manifestNode.querySelector("item[properties='cover-image']");
	return node ? node.getAttribute('href') : false;
};

//-- Expanded to match Readium web components
EPUBJS.Parser.prototype.metadata = function(xml){
	var metadata = {},
			p = this;

	metadata.bookTitle = p.getElementText(xml, 'title');
	metadata.creator = p.getElementText(xml, 'creator');
	metadata.description = p.getElementText(xml, 'description');

	metadata.pubdate = p.getElementText(xml, 'date');

	metadata.publisher = p.getElementText(xml, 'publisher');

	metadata.identifier = p.getElementText(xml, "identifier");
	metadata.language = p.getElementText(xml, "language");
	metadata.rights = p.getElementText(xml, "rights");

	metadata.modified_date = p.querySelectorText(xml, "meta[property='dcterms:modified']");
	metadata.layout = p.querySelectorText(xml, "meta[property='rendition:layout']");
	metadata.orientation = p.querySelectorText(xml, "meta[property='rendition:orientation']");
	metadata.spread = p.querySelectorText(xml, "meta[property='rendition:spread']");

	return metadata;
};

EPUBJS.Parser.prototype.getElementText = function(xml, tag){
	var found = xml.getElementsByTagNameNS("http://purl.org/dc/elements/1.1/", tag),
		el;

	if(!found || found.length === 0) return '';

	el = found[0];

	if(el.childNodes.length){
		return el.childNodes[0].nodeValue;
	}

	return '';

};

EPUBJS.Parser.prototype.querySelectorText = function(xml, q){
	var el = xml.querySelector(q);

	if(el && el.childNodes.length){
		return el.childNodes[0].nodeValue;
	}

	return '';
};

EPUBJS.Parser.prototype.manifest = function(manifestXml){
	var baseUrl = this.baseUrl,
			manifest = {};

	//-- Turn items into an array
	var selected = manifestXml.querySelectorAll("item"),
		items = Array.prototype.slice.call(selected);

	//-- Create an object with the id as key
	items.forEach(function(item){
		var id = item.getAttribute('id'),
				href = item.getAttribute('href') || '',
				type = item.getAttribute('media-type') || '',
				properties = item.getAttribute('properties') || '';

		manifest[id] = {
			'href' : href,
			'url' : baseUrl + href, //-- Absolute URL for loading with a web worker
			'type' : type,
      'properties' : properties
		};

	});

	return manifest;

};

EPUBJS.Parser.prototype.spine = function(spineXml, manifest){
	var spine = [];

	var selected = spineXml.getElementsByTagName("itemref"),
			items = Array.prototype.slice.call(selected);

	var spineNodeIndex = Array.prototype.indexOf.call(spineXml.parentNode.childNodes, spineXml);

	var epubcfi = new EPUBJS.EpubCFI();

	//-- Add to array to mantain ordering and cross reference with manifest
	items.forEach(function(item, index){
		var Id = item.getAttribute('idref');
		var cfiBase = epubcfi.generateChapterComponent(spineNodeIndex, index, Id);
		var props = item.getAttribute('properties') || '';
		var propArray = props.length ? props.split(' ') : [];
		var manifestProps = manifest[Id].properties;
		var manifestPropArray = manifestProps.length ? manifestProps.split(' ') : [];
		var vert = {
			'id' : Id,
			'linear' : item.getAttribute('linear') || '',
			'properties' : propArray,
			'manifestProperties' : manifestPropArray,
			'href' : manifest[Id].href,
			'url' :  manifest[Id].url,
			'index' : index,
			'cfiBase' : cfiBase,
			'cfi' : "epub(" + cfiBase + ")"
		};
		spine.push(vert);
	});

	return spine;
};

EPUBJS.Parser.prototype.nav = function(navHtml, spineIndexByURL, bookSpine){
	var navEl = navHtml.querySelector('nav[*|type="toc"]'), //-- [*|type="toc"] * Doesn't seem to work
			idCounter = 0;

	if(!navEl) return [];

	// Implements `> ol > li`
	function findListItems(parent){
		var items = [];

		Array.prototype.slice.call(parent.childNodes).forEach(function(node){
			if('ol' == node.tagName){
				Array.prototype.slice.call(node.childNodes).forEach(function(item){
					if('li' == item.tagName){
						items.push(item);
					}
				});
			}
		});

		return items;

	}

	// Implements `> a, > span`
	function findAnchorOrSpan(parent){
		var item = null;

		Array.prototype.slice.call(parent.childNodes).forEach(function(node){
			if('a' == node.tagName || 'span' == node.tagName){
				item = node;
			}
		});

		return item;
	}

	function getTOC(parent){
		var list = [],
				nodes = findListItems(parent),
				items = Array.prototype.slice.call(nodes),
				length = items.length,
				node;

		if(length === 0) return false;

		items.forEach(function(item){
			var id = item.getAttribute('id') || false,
				content = findAnchorOrSpan(item),
				href = content.getAttribute('href') || '',
				text = content.textContent || "",
				split = href.split("#"),
				baseUrl = split[0],
				subitems = getTOC(item),
				spinePos = spineIndexByURL[baseUrl],
				spineItem = bookSpine[spinePos],
				cfi = 	spineItem ? spineItem.cfi : '';

			if(!id) {
				if(spinePos) {
					spineItem = bookSpine[spinePos];
					id = spineItem.id;
					cfi = spineItem.cfi;
				} else {
					id = 'epubjs-autogen-toc-id-' + (idCounter++);
				}
			}

			item.setAttribute('id', id); // Ensure all elements have an id
			list.push({
				"id": id,
				"href": href,
				"label": text,
				"subitems" : subitems,
				"parent" : parent ? parent.getAttribute('id') : null,
				"cfi" : cfi
			});

		});

		return list;
	}

	return getTOC(navEl);
};

EPUBJS.Parser.prototype.toc = function(tocXml, spineIndexByURL, bookSpine){
	var navMap = tocXml.querySelector("navMap");
	if(!navMap) return [];

	function getTOC(parent){
		var list = [],
			snapshot = tocXml.evaluate("*[local-name()='navPoint']", parent, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null),
			length = snapshot.snapshotLength;

		if(length === 0) return [];

		for ( var i=length-1 ; i >= 0; i-- ) {
			var item = snapshot.snapshotItem(i);

			var id = item.getAttribute('id') || false,
					content = item.querySelector("content"),
					src = content.getAttribute('src'),
					navLabel = item.querySelector("navLabel"),
					text = navLabel.textContent ? navLabel.textContent : "",
					split = src.split("#"),
					baseUrl = split[0],
					spinePos = spineIndexByURL[baseUrl],
					spineItem = bookSpine[spinePos],
					subitems = getTOC(item),
					cfi = 	spineItem ? spineItem.cfi : '';

			if(!id) {
				if(spinePos) {
					spineItem = bookSpine[spinePos];
					id = spineItem.id;
					cfi = 	spineItem.cfi;
				} else {
					id = 'epubjs-autogen-toc-id-' + (idCounter++);
				}
			}

			list.unshift({
						"id": id,
						"href": src,
						"label": text,
						"spinePos": spinePos,
						"subitems" : subitems,
						"parent" : parent ? parent.getAttribute('id') : null,
						"cfi" : cfi
			});

		}

		return list;
	}

	return getTOC(navMap);
};

EPUBJS.Parser.prototype.pageList = function(navHtml, spineIndexByURL, bookSpine){
	var navEl = navHtml.querySelector('nav[*|type="page-list"]'),
			idCounter = 0;

	if(!navEl) return [];

	// Implements `> ol > li`
	function findListItems(parent){
		var items = [];

		Array.prototype.slice.call(parent.childNodes).forEach(function(node){
			if('ol' == node.tagName){
				Array.prototype.slice.call(node.childNodes).forEach(function(item){
					if('li' == item.tagName){
						items.push(item);
					}
				});
			}
		});

		return items;

	}

	// Implements `> a, > span`
	function findAnchorOrSpan(parent){
		var item = null;

		Array.prototype.slice.call(parent.childNodes).forEach(function(node){
			if('a' == node.tagName || 'span' == node.tagName){
				item = node;
			}
		});

		return item;
	}

	function getPages(parent){
		var list = [],
				nodes = findListItems(parent),
				items = Array.prototype.slice.call(nodes),
				length = items.length,
				node;

		if(length === 0) return false;

		items.forEach(function(item){
			var id = item.getAttribute('id') || false,
				content = findAnchorOrSpan(item),
				href = content.getAttribute('href') || '',
				text = content.textContent || "",
				page = parseInt(text),
				isCfi = href.indexOf("epubcfi"),
				split,
				packageUrl,
				cfi;

			if(isCfi != -1) {
				split = href.split("#");
				packageUrl = split[0];
				cfi = split.length > 1 ? split[1] : false;
				list.push({
					"cfi" : cfi,
					"href" : href,
					"packageUrl" : packageUrl,
					"page" : page
				});
			} else {
				list.push({
					"href" : href,
					"page" : page
				});
			}

		});

		return list;
	}

	return getPages(navEl);
};

EPUBJS.Render.Iframe = function() {
	this.iframe = null;
	this.document = null;
	this.window = null;
	this.docEl = null;
	this.bodyEl = null;

	this.leftPos = 0;
	this.pageWidth = 0;
};

//-- Build up any html needed
EPUBJS.Render.Iframe.prototype.create = function(){
	this.iframe = document.createElement('iframe');
	this.iframe.id = "epubjs-iframe:" + EPUBJS.core.uuid();
	this.iframe.scrolling = "no";
	this.iframe.seamless = "seamless";
	// Back up if seamless isn't supported
	this.iframe.style.border = "none";

	this.iframe.addEventListener("load", this.loaded.bind(this), false);

	this.isMobile = navigator.userAgent.match(/(iPad|iPhone|iPod|Mobile|Android)/g);
	this.transform = EPUBJS.core.prefixed('transform');
	
	return this.iframe;
};

/**
* Sets the source of the iframe with the given URL string
* Takes:  Document Contents String
* Returns: promise with document element
*/
EPUBJS.Render.Iframe.prototype.load = function(contents, url){
	var render = this,
			deferred = new RSVP.defer();

	if(this.window) {
		this.unload();
	}

	this.iframe.onload = function(e) {
		var title;

		render.document = render.iframe.contentDocument;
		render.docEl = render.document.documentElement;
		render.headEl = render.document.head;
		render.bodyEl = render.document.body || render.document.querySelector("body");
		render.window = render.iframe.contentWindow;

		render.window.addEventListener("resize", render.resized.bind(render), false);

		// Reset the scroll position
		render.leftPos = 0;
		render.setLeft(0);

		//-- Clear Margins
		if(render.bodyEl) {
			render.bodyEl.style.margin = "0";
		}

		// HTML element must have direction set if RTL or columnns will
		// not be in the correct direction in Firefox
		// Firefox also need the html element to be position right
		if(render.direction == "rtl" && render.docEl.dir != "rtl"){
			render.docEl.dir = "rtl";
			render.docEl.style.position = "absolute";
			render.docEl.style.right = "0";
		}

		deferred.resolve(render.docEl);
	};

	this.iframe.onerror = function(e) {
		//console.error("Error Loading Contents", e);
		deferred.reject({
				message : "Error Loading Contents: " + e,
				stack : new Error().stack
			});
	};

	// this.iframe.contentWindow.location.replace(url);
	this.document = this.iframe.contentDocument;

  if(!this.document) {
    deferred.reject(new Error("No Document Available"));
    return deferred;
  }

  this.document.open();
  this.document.write(contents);
  this.document.close();

	return deferred.promise;
};


EPUBJS.Render.Iframe.prototype.loaded = function(v){
	var url = this.iframe.contentWindow.location.href;
	var baseEl, base;

	this.document = this.iframe.contentDocument;
	this.docEl = this.document.documentElement;
	this.headEl = this.document.head;
	this.bodyEl = this.document.body || this.document.querySelector("body");
	this.window = this.iframe.contentWindow;

	if(url != "about:blank"){
		baseEl = this.iframe.contentDocument.querySelector("base");
		base = baseEl.getAttribute('href');
		this.trigger("render:loaded", base);
	}
};

// Resize the iframe to the given width and height
EPUBJS.Render.Iframe.prototype.resize = function(width, height){
	var iframeBox;

	if(!this.iframe) return;

	this.iframe.height = height;

	if(!isNaN(width) && width % 2 !== 0){
		width += 1; //-- Prevent cutting off edges of text in columns
	}

	this.iframe.width = width;
	// Get the fractional height and width of the iframe
	// Default to orginal if bounding rect is 0
	this.width = this.iframe.getBoundingClientRect().width || width;
	this.height = this.iframe.getBoundingClientRect().height || height;
};


EPUBJS.Render.Iframe.prototype.resized = function(e){
	// Get the fractional height and width of the iframe
	this.width = this.iframe.getBoundingClientRect().width;
	this.height = this.iframe.getBoundingClientRect().height;
};

EPUBJS.Render.Iframe.prototype.totalWidth = function(){
	return this.docEl.scrollWidth;
};

EPUBJS.Render.Iframe.prototype.totalHeight = function(){
	return this.docEl.scrollHeight;
};

EPUBJS.Render.Iframe.prototype.setPageDimensions = function(pageWidth, pageHeight){
	this.pageWidth = pageWidth;
	this.pageHeight = pageHeight;
	//-- Add a page to the width of the document to account an for odd number of pages
	// this.docEl.style.width = this.docEl.scrollWidth + pageWidth + "px";
};

EPUBJS.Render.Iframe.prototype.setDirection = function(direction){

	this.direction = direction;

	// Undo previous changes if needed
	if(this.docEl && this.docEl.dir == "rtl"){
		this.docEl.dir = "rtl";
		this.docEl.style.position = "static";
		this.docEl.style.right = "auto";
	}

};

EPUBJS.Render.Iframe.prototype.setLeft = function(leftPos){
	// this.bodyEl.style.marginLeft = -leftPos + "px";
	// this.docEl.style.marginLeft = -leftPos + "px";
	// this.docEl.style[EPUBJS.Render.Iframe.transform] = 'translate('+ (-leftPos) + 'px, 0)';

	if (this.isMobile) {
		this.docEl.style[this.transform] = 'translate('+ (-leftPos) + 'px, 0)';
	} else {
		this.document.defaultView.scrollTo(leftPos, 0);
	}

};

EPUBJS.Render.Iframe.prototype.setStyle = function(style, val, prefixed){
	if(prefixed) {
		style = EPUBJS.core.prefixed(style);
	}

	if(this.bodyEl) this.bodyEl.style[style] = val;
};

EPUBJS.Render.Iframe.prototype.removeStyle = function(style){

	if(this.bodyEl) this.bodyEl.style[style] = '';

};

EPUBJS.Render.Iframe.prototype.addHeadTag = function(tag, attrs, _doc) {
	var doc = _doc || this.document;
	var tagEl = doc.createElement(tag);
	var headEl = doc.head;

	for(var attr in attrs) {
		tagEl.setAttribute(attr, attrs[attr]);
	}

	if(headEl) headEl.insertBefore(tagEl, headEl.firstChild);
};

EPUBJS.Render.Iframe.prototype.page = function(pg){
	this.leftPos = this.pageWidth * (pg-1); //-- pages start at 1

	// Reverse for rtl langs
	if(this.direction === "rtl"){
		this.leftPos = this.leftPos * -1;
	}

	this.setLeft(this.leftPos);
};

//-- Show the page containing an Element
EPUBJS.Render.Iframe.prototype.getPageNumberByElement = function(el){
	var left, pg;
	if(!el) return;

	left = this.leftPos + el.getBoundingClientRect().left; //-- Calculate left offset compaired to scrolled position

	pg = Math.floor(left / this.pageWidth) + 1; //-- pages start at 1

	return pg;
};

//-- Show the page containing an Element
EPUBJS.Render.Iframe.prototype.getPageNumberByRect = function(boundingClientRect){
	var left, pg;

	left = this.leftPos + boundingClientRect.left; //-- Calculate left offset compaired to scrolled position
	pg = Math.floor(left / this.pageWidth) + 1; //-- pages start at 1

	return pg;
};

// Return the root element of the content
EPUBJS.Render.Iframe.prototype.getBaseElement = function(){
	return this.bodyEl;
};

// Return the document element
EPUBJS.Render.Iframe.prototype.getDocumentElement = function(){
	return this.docEl;
};

// Checks if an element is on the screen
EPUBJS.Render.Iframe.prototype.isElementVisible = function(el){
	var rect;
	var left;

	if(el && typeof el.getBoundingClientRect === 'function'){
		rect = el.getBoundingClientRect();
		left = rect.left; //+ rect.width;
		if( rect.width !== 0 &&
				rect.height !== 0 && // Element not visible
				left >= 0 &&
				left < this.pageWidth ) {
			return true;
		}
	}

	return false;
};


EPUBJS.Render.Iframe.prototype.scroll = function(bool){
	if(bool) {
		this.iframe.scrolling = "yes";
	} else {
		this.iframe.scrolling = "no";
	}
};

// Cleanup event listeners
EPUBJS.Render.Iframe.prototype.unload = function(){
	this.window.removeEventListener("resize", this.resized);
};

//-- Enable binding events to Render
RSVP.EventTarget.mixin(EPUBJS.Render.Iframe.prototype);

EPUBJS.Renderer = function(renderMethod, hidden) {
	// Dom events to listen for
	this.listenedEvents = ["keydown", "keyup", "keypressed", "mouseup", "mousedown", "click"];
	this.upEvent = "mouseup";
	this.downEvent = "mousedown";
	if('ontouchstart' in document.documentElement) {
		this.listenedEvents.push("touchstart", "touchend");
		this.upEvent = "touchend";
		this.downEvent = "touchstart";
	}
	/**
	* Setup a render method.
	* Options are: Iframe
	*/
	if(renderMethod && typeof(EPUBJS.Render[renderMethod]) != "undefined"){
		this.render = new EPUBJS.Render[renderMethod]();
	} else {
		console.error("Not a Valid Rendering Method");
	}

	// Listen for load events
	this.render.on("render:loaded", this.loaded.bind(this));

	// Cached for replacement urls from storage
	this.caches = {};

	// Blank Cfi for Parsing
	this.epubcfi = new EPUBJS.EpubCFI();

	this.spreads = true;
	this.isForcedSingle = false;
	this.resized = this.onResized.bind(this);

	this.layoutSettings = {};

	this.hidden = hidden || false;
	//-- Adds Hook methods to the Book prototype
	//   Hooks will all return before triggering the callback.
	EPUBJS.Hooks.mixin(this);
	//-- Get pre-registered hooks for events
	this.getHooks("beforeChapterDisplay");

	//-- Queue up page changes if page map isn't ready
	this._q = EPUBJS.core.queue(this);

	this._moving = false;

};

//-- Renderer events for listening
EPUBJS.Renderer.prototype.Events = [
	"renderer:keydown",
	"renderer:keyup",
	"renderer:keypressed",
	"renderer:mouseup",
	"renderer:mousedown",
	"renderer:click",
	"renderer:touchstart",
	"renderer:touchend",
	"renderer:selected",
	"renderer:chapterUnloaded",
	"renderer:chapterDisplayed",
	"renderer:locationChanged",
	"renderer:visibleLocationChanged",
	"renderer:resized",
	"renderer:spreads"
];

/**
* Creates an element to render to.
* Resizes to passed width and height or to the elements size
*/
EPUBJS.Renderer.prototype.initialize = function(element, width, height){
	this.container = element;
	this.element = this.render.create();

	this.initWidth = width;
	this.initHeight = height;

	this.width = width || this.container.clientWidth;
	this.height = height || this.container.clientHeight;

	this.container.appendChild(this.element);

	if(width && height){
		this.render.resize(this.width, this.height);
	} else {
		this.render.resize('100%', '100%');
	}

	document.addEventListener("orientationchange", this.onResized);
};

/**
* Display a chapter
* Takes: chapter object, global layout settings
* Returns: Promise with passed Renderer after pages has loaded
*/
EPUBJS.Renderer.prototype.displayChapter = function(chapter, globalLayout){
	var store = false;
	if(this._moving) {
		console.error("Rendering In Progress");
		return;
	}
	this._moving = true;
	// Get the url string from the chapter (may be from storage)
	return chapter.render().
		then(function(contents) {

			// Unload the previous chapter listener
			if(this.currentChapter) {
				this.currentChapter.unload(); // Remove stored blobs

				if(this.render.window){
					this.render.window.removeEventListener("resize", this.resized);
				}

				this.removeEventListeners();
				this.removeSelectionListeners();
				this.trigger("renderer:chapterUnloaded");
				this.contents = null;
				this.doc = null;
				this.pageMap = null;
			}

			this.currentChapter = chapter;

			this.chapterPos = 1;

			this.currentChapterCfiBase = chapter.cfiBase;

			this.layoutSettings = this.reconcileLayoutSettings(globalLayout, chapter.properties);

			return this.load(contents, chapter.href);

		}.bind(this));

};

/**
* Loads a url (string) and renders it,
* attaching event listeners and triggering hooks.
* Returns: Promise with the rendered contents.
*/

EPUBJS.Renderer.prototype.load = function(contents, url){
	var deferred = new RSVP.defer();
	var loaded;

	// Switch to the required layout method for the settings
	this.layoutMethod = this.determineLayout(this.layoutSettings);
	this.layout = new EPUBJS.Layout[this.layoutMethod]();

	this.visible(false);

	render = this.render.load(contents, url);

	render.then(function(contents) {

		this.afterLoad(contents);

		//-- Trigger registered hooks before displaying
		this.beforeDisplay(function(){

			this.afterDisplay();

			this.visible(true);


			deferred.resolve(this); //-- why does this return the renderer?

		}.bind(this));

	}.bind(this));

	return deferred.promise;
};

EPUBJS.Renderer.prototype.afterLoad = function(contents) {
	var formated;
	this.currentChapter.setDocument(this.render.document);
	this.contents = contents;
	this.doc = this.render.document;

	// Format the contents using the current layout method
	this.formated = this.layout.format(contents, this.render.width, this.render.height, this.gap);
	this.render.setPageDimensions(this.formated.pageWidth, this.formated.pageHeight);

	// window.addEventListener("orientationchange", this.onResized.bind(this), false);
	if(!this.initWidth && !this.initHeight){
		this.render.window.addEventListener("resize", this.resized, false);
	}

	this.addEventListeners();
	this.addSelectionListeners();

};

EPUBJS.Renderer.prototype.afterDisplay = function(contents) {

	var pages = this.layout.calculatePages();
	var msg = this.currentChapter;
	var queued = this._q.length();
	this._moving = false;

	this.updatePages(pages);

	this.visibleRangeCfi = this.getVisibleRangeCfi();
	this.currentLocationCfi = this.visibleRangeCfi.start;

	if(queued === 0) {
		this.trigger("renderer:locationChanged", this.currentLocationCfi);
		this.trigger("renderer:visibleRangeChanged", this.visibleRangeCfi);
	}

	msg.cfi = this.currentLocationCfi; //TODO: why is this cfi passed to chapterDisplayed
	this.trigger("renderer:chapterDisplayed", msg);

};

EPUBJS.Renderer.prototype.loaded = function(url){
	this.trigger("render:loaded", url);
	// var uri = EPUBJS.core.uri(url);
	// var relative = uri.path.replace(book.bookUrl, '');
	// console.log(url, uri, relative);
};

/**
* Reconciles the current chapters layout properies with
* the global layout properities.
* Takes: global layout settings object, chapter properties string
* Returns: Object with layout properties
*/
EPUBJS.Renderer.prototype.reconcileLayoutSettings = function(global, chapter){
	var settings = {};

	//-- Get the global defaults
	for (var attr in global) {
		if (global.hasOwnProperty(attr)){
			settings[attr] = global[attr];
		}
	}
	//-- Get the chapter's display type
	chapter.forEach(function(prop){
		var rendition = prop.replace("rendition:", '');
		var split = rendition.indexOf("-");
		var property, value;

		if(split != -1){
			property = rendition.slice(0, split);
			value = rendition.slice(split+1);

			settings[property] = value;
		}
	});
 return settings;
};

/**
* Uses the settings to determine which Layout Method is needed
* Triggers events based on the method choosen
* Takes: Layout settings object
* Returns: String of appropriate for EPUBJS.Layout function
*/
EPUBJS.Renderer.prototype.determineLayout = function(settings){
	// Default is layout: reflowable & spread: auto
	var spreads = this.determineSpreads(this.minSpreadWidth);
	var layoutMethod = spreads ? "ReflowableSpreads" : "Reflowable";
	var scroll = false;

	if(settings.layout === "pre-paginated") {
		layoutMethod = "Fixed";
		scroll = true;
		spreads = false;
	}

	if(settings.layout === "reflowable" && settings.spread === "none") {
		layoutMethod = "Reflowable";
		scroll = false;
		spreads = false;
	}

	if(settings.layout === "reflowable" && settings.spread === "both") {
		layoutMethod = "ReflowableSpreads";
		scroll = false;
		spreads = true;
	}

	this.spreads = spreads;
	this.render.scroll(scroll);
	this.trigger("renderer:spreads", spreads);
	return layoutMethod;
};

// Shortcut to trigger the hook before displaying the chapter
EPUBJS.Renderer.prototype.beforeDisplay = function(callback, renderer){
	this.triggerHooks("beforeChapterDisplay", callback, this);
};

// Update the renderer with the information passed by the layout
EPUBJS.Renderer.prototype.updatePages = function(layout){
	this.pageMap = this.mapPage();
	// this.displayedPages = layout.displayedPages;

	if (this.spreads) {
		this.displayedPages = Math.ceil(this.pageMap.length / 2);
	} else {
		this.displayedPages = this.pageMap.length;
	}

	// this.currentChapter.pages = layout.pageCount;
	this.currentChapter.pages = this.pageMap.length;

	this._q.flush();
};

// Apply the layout again and jump back to the previous cfi position
EPUBJS.Renderer.prototype.reformat = function(){
	var renderer = this;
	var formated, pages;
	if(!this.contents) return;

	spreads = this.determineSpreads(this.minSpreadWidth);

	// Only re-layout if the spreads have switched
	if(spreads != this.spreads){
		this.spreads = spreads;
		this.layoutMethod = this.determineLayout(this.layoutSettings);
		this.layout = new EPUBJS.Layout[this.layoutMethod]();
	}

	// Reset pages
	this.chapterPos = 1;

	this.render.page(this.chapterPos);
	// Give the css styles time to update
	// clearTimeout(this.timeoutTillCfi);
	// this.timeoutTillCfi = setTimeout(function(){
	renderer.formated = renderer.layout.format(renderer.render.docEl, renderer.render.width, renderer.render.height, renderer.gap);
	renderer.render.setPageDimensions(renderer.formated.pageWidth, renderer.formated.pageHeight);

	pages = renderer.layout.calculatePages();
	renderer.updatePages(pages);

	//-- Go to current page after formating
	if(renderer.currentLocationCfi){
		renderer.gotoCfi(renderer.currentLocationCfi);
	}
		// renderer.timeoutTillCfi = null;

};

// Hide and show the render's container .
EPUBJS.Renderer.prototype.visible = function(bool){
	if(typeof(bool) === "undefined") {
		return this.element.style.visibility;
	}

	if(bool === true && !this.hidden){
		this.element.style.visibility = "visible";
	}else if(bool === false){
		this.element.style.visibility = "hidden";
	}
};

// Remove the render element and clean up listeners
EPUBJS.Renderer.prototype.remove = function() {
	if(this.render.window) {
		this.render.unload();
		this.render.window.removeEventListener("resize", this.resized);
		this.removeEventListeners();
		this.removeSelectionListeners();
	}

	this.container.removeChild(this.element);
};

//-- STYLES

EPUBJS.Renderer.prototype.applyStyles = function(styles) {
	for (var style in styles) {
		this.render.setStyle(style, styles[style]);
	}
};

EPUBJS.Renderer.prototype.setStyle = function(style, val, prefixed){
	this.render.setStyle(style, val, prefixed);
};

EPUBJS.Renderer.prototype.removeStyle = function(style){
	this.render.removeStyle(style);
};

//-- HEAD TAGS
EPUBJS.Renderer.prototype.applyHeadTags = function(headTags) {
	for ( var headTag in headTags ) {
		this.render.addHeadTag(headTag, headTags[headTag]);
	}
};

//-- NAVIGATION

EPUBJS.Renderer.prototype.page = function(pg){
	if(!this.pageMap) {
		console.warn("pageMap not set, queuing");
		this._q.enqueue("page", arguments);
		return true;
	}

	if(pg >= 1 && pg <= this.displayedPages){
		this.chapterPos = pg;

		this.render.page(pg);
		this.visibleRangeCfi = this.getVisibleRangeCfi();
		this.currentLocationCfi = this.visibleRangeCfi.start;
		this.trigger("renderer:locationChanged", this.currentLocationCfi);
		this.trigger("renderer:visibleRangeChanged", this.visibleRangeCfi);

		return true;
	}
	//-- Return false if page is greater than the total
	return false;
};

// Short cut to find next page's cfi starting at the last visible element
/*
EPUBJS.Renderer.prototype.nextPage = function(){
	var pg = this.chapterPos + 1;
	if(pg <= this.displayedPages){
		this.chapterPos = pg;

		this.render.page(pg);

		this.currentLocationCfi = this.getPageCfi(this.visibileEl);
		this.trigger("renderer:locationChanged", this.currentLocationCfi);

		return true;
	}
	//-- Return false if page is greater than the total
	return false;
};
*/
EPUBJS.Renderer.prototype.nextPage = function(){
	return this.page(this.chapterPos + 1);
};

EPUBJS.Renderer.prototype.prevPage = function(){
	return this.page(this.chapterPos - 1);
};

//-- Show the page containing an Element
EPUBJS.Renderer.prototype.pageByElement = function(el){
	var pg;
	if(!el) return;

	pg = this.render.getPageNumberByElement(el);
	this.page(pg);
};

// Jump to the last page of the chapter
EPUBJS.Renderer.prototype.lastPage = function(){
	if(this._moving) {
		return this._q.enqueue("lastPage", arguments);
	}

	this.page(this.displayedPages);
};

// Jump to the first page of the chapter
EPUBJS.Renderer.prototype.firstPage = function(){
	if(this._moving) {
		return this._q.enqueue("firstPage", arguments);
	}

	this.page(1);
};

//-- Find a section by fragement id
EPUBJS.Renderer.prototype.section = function(fragment){
	var el = this.doc.getElementById(fragment),
		left, pg;

	if(el){
		this.pageByElement(el);
	}

};

EPUBJS.Renderer.prototype.firstElementisTextNode = function(node) {
	var children = node.childNodes;
	var leng = children.length;

	if(leng &&
		children[0] && // First Child
		children[0].nodeType === 3 && // This is a textNodes
		children[0].textContent.trim().length) { // With non whitespace or return charecters
		return true;
	}
	return false;
};

EPUBJS.Renderer.prototype.isGoodNode = function(node) {
	var embeddedElements = ["audio", "canvas", "embed", "iframe", "img", "math", "object", "svg", "video"];
	if (embeddedElements.indexOf(node.tagName.toLowerCase()) !== -1) {
		// Embedded elements usually do not have a text node as first element, but are also good nodes
		return true;
	}
	return this.firstElementisTextNode(node);
};

// Walk the node tree from a start element to next visible element
EPUBJS.Renderer.prototype.walk = function(node, x, y) {
	var r, children, leng,
		startNode = node,
		prevNode,
		stack = [startNode];

	var STOP = 10000, ITER=0;

	while(!r && stack.length) {
		node = stack.shift();
		if( this.containsPoint(node, x, y) && this.isGoodNode(node)) {
			r = node;
		}

		if(!r && node && node.childElementCount > 0){
			children = node.children;
			if (children && children.length) {
				leng = children.length ? children.length : 0;
			} else {
				return r;
			}
			for (var i = leng-1; i >= 0; i--) {
				if(children[i] != prevNode) stack.unshift(children[i]);
			}
		}

		if(!r && stack.length === 0 && startNode && startNode.parentNode !== null){
			stack.push(startNode.parentNode);
			prevNode = startNode;
			startNode = startNode.parentNode;
		}


		ITER++;
		if(ITER > STOP) {
			console.error("ENDLESS LOOP");
			break;
		}

	}

	return r;
};

// Checks if an element is on the screen
EPUBJS.Renderer.prototype.containsPoint = function(el, x, y){
	var rect;
	var left;
	if(el && typeof el.getBoundingClientRect === 'function'){
		rect = el.getBoundingClientRect();
		// console.log(el, rect, x, y);

		if( rect.width !== 0 &&
				rect.height !== 0 && // Element not visible
				rect.left >= x &&
				x <= rect.left + rect.width) {
			return true;
		}
	}

	return false;
};

EPUBJS.Renderer.prototype.textSprint = function(root, func) {
	var treeWalker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, {
			acceptNode: function (node) {
					if ( ! /^\s*$/.test(node.data) ) {
						return NodeFilter.FILTER_ACCEPT;
					} else {
						return NodeFilter.FILTER_REJECT;
					}
			}
	}, false);
	var node;
	while ((node = treeWalker.nextNode())) {
		func(node);
	}

};

EPUBJS.Renderer.prototype.sprint = function(root, func) {
	var treeWalker = document.createTreeWalker(root, NodeFilter.SHOW_ELEMENT, null, false);
	var node;
	while ((node = treeWalker.nextNode())) {
		func(node);
	}

};

EPUBJS.Renderer.prototype.mapPage = function(){
	var renderer = this;
	var map = [];
	var root = this.render.getBaseElement();
	var page = 1;
	var width = this.layout.colWidth + this.layout.gap;
	var offset = this.formated.pageWidth * (this.chapterPos-1);
	var limit = (width * page) - offset;// (width * page) - offset;
	var elLimit = 0;
	var prevRange;
	var cfi;
	var check = function(node) {
		var elPos;
		var elRange;
		var children = Array.prototype.slice.call(node.childNodes);
		if (node.nodeType == Node.ELEMENT_NODE) {
			// elPos = node.getBoundingClientRect();
			elRange = document.createRange();
			elRange.selectNodeContents(node);
			elPos = elRange.getBoundingClientRect();

			if(!elPos || (elPos.width === 0 && elPos.height === 0)) {
				return;
			}

			//-- Element starts new Col
			if(elPos.left > elLimit) {
				children.forEach(function(node){
					if(node.nodeType == Node.TEXT_NODE &&
						node.textContent.trim().length) {
						checkText(node);
					}
				});
			}

			//-- Element Spans new Col
			if(elPos.right > elLimit) {
				children.forEach(function(node){
					if(node.nodeType == Node.TEXT_NODE &&
						node.textContent.trim().length) {
						checkText(node);
					}
				});
			}
		}

	};
	var checkText = function(node){
		var ranges = renderer.splitTextNodeIntoWordsRanges(node);
		ranges.forEach(function(range){
			var pos = range.getBoundingClientRect();

			if(!pos || (pos.width === 0 && pos.height === 0)) {
				return;
			}
			if(pos.left + pos.width < limit) {
				if(!map[page-1]){
					range.collapse(true);
					cfi = renderer.currentChapter.cfiFromRange(range);
					// map[page-1].start = cfi;
					map.push({ start: cfi, end: null });
				}
			} else {
				if(prevRange){
					prevRange.collapse(true);
					cfi = renderer.currentChapter.cfiFromRange(prevRange);
					map[map.length-1].end = cfi;
				}

				range.collapse(true);
				cfi = renderer.currentChapter.cfiFromRange(range);
				map.push({
						start: cfi,
						end: null
				});

				page += 1;
				limit = (width * page) - offset;
				elLimit = limit;
			}

			prevRange = range;
		});


	};
	var docEl = this.render.getDocumentElement();
	var dir = docEl.dir;

	// Set back to ltr before sprinting to get correct order
	if(dir == "rtl") {
		docEl.dir = "ltr";
		docEl.style.position = "static";
	}

	this.sprint(root, check);

	// Reset back to previous RTL settings
	if(dir == "rtl") {
		docEl.dir = dir;
		docEl.style.left = "auto";
		docEl.style.right = "0";
	}

	// this.textSprint(root, checkText);

	if(prevRange){
		prevRange.collapse(true);

		cfi = renderer.currentChapter.cfiFromRange(prevRange);
		map[map.length-1].end = cfi;
	}

	// Handle empty map
	if(!map.length) {
		range = this.doc.createRange();
		range.selectNodeContents(root);
		range.collapse(true);

		cfi = renderer.currentChapter.cfiFromRange(range);

		map.push({ start: cfi, end: cfi });

	}

	// clean up
	prevRange = null;
	ranges = null;
	range = null;
	root = null;

	return map;
};


EPUBJS.Renderer.prototype.indexOfBreakableChar = function (text, startPosition) {
	var whiteCharacters = "\x2D\x20\t\r\n\b\f";
	// '-' \x2D
	// ' ' \x20

	if (! startPosition) {
		startPosition = 0;
	}

	for (var i = startPosition; i < text.length; i++) {
		if (whiteCharacters.indexOf(text.charAt(i)) != -1) {
			return i;
		}
	}

	return -1;
};


EPUBJS.Renderer.prototype.splitTextNodeIntoWordsRanges = function(node){
	var ranges = [];
	var text = node.textContent.trim();
	var range;
	var rect;
	var list;
	// jaroslaw.bielski@7bulls.com
	// Usage of indexOf() function for space character as word delimiter
	// is not sufficient in case of other breakable characters like \r\n- etc
	pos = this.indexOfBreakableChar(text);

	if(pos === -1) {
		range = this.doc.createRange();
		range.selectNodeContents(node);
		return [range];
	}

	range = this.doc.createRange();
	range.setStart(node, 0);
	range.setEnd(node, pos);
	ranges.push(range);

	// jaroslaw.bielski@7bulls.com
	// there was a word miss in case of one letter words
	range = this.doc.createRange();
	range.setStart(node, pos+1);

	while ( pos != -1 ) {

		pos = this.indexOfBreakableChar(text, pos + 1);
		if(pos > 0) {

			if(range) {
				range.setEnd(node, pos);
				ranges.push(range);
			}

			range = this.doc.createRange();
			range.setStart(node, pos+1);
		}
	}

	if(range) {
		range.setEnd(node, text.length);
		ranges.push(range);
	}

	return ranges;
};

EPUBJS.Renderer.prototype.rangePosition = function(range){
	var rect;
	var list;

	list = range.getClientRects();

	if(list.length) {
		rect = list[0];
		return rect;
	}

	return null;
};

/*
// Get the cfi of the current page
EPUBJS.Renderer.prototype.getPageCfi = function(prevEl){
	var range = this.doc.createRange();
	var position;
	// TODO : this might need to take margin / padding into account?
	var x = 1;//this.formated.pageWidth/2;
	var y = 1;//;this.formated.pageHeight/2;

	range = this.getRange(x, y);

	// var test = this.doc.defaultView.getSelection();
	// var r = this.doc.createRange();
	// test.removeAllRanges();
	// r.setStart(range.startContainer, range.startOffset);
	// r.setEnd(range.startContainer, range.startOffset + 1);
	// test.addRange(r);

	return this.currentChapter.cfiFromRange(range);
};
*/

// Get the cfi of the current page
EPUBJS.Renderer.prototype.getPageCfi = function(){
	var pg;
	if (this.spreads) {
		pg = this.chapterPos*2;
		startRange = this.pageMap[pg-2];
	} else {
		pg = this.chapterPos;
		startRange = this.pageMap[pg-1];
	}
	return this.pageMap[(this.chapterPos * 2) -1].start;
};

EPUBJS.Renderer.prototype.getRange = function(x, y, forceElement){
	var range = this.doc.createRange();
	var position;
	forceElement = true; // temp override
	if(typeof document.caretPositionFromPoint !== "undefined" && !forceElement){
		position = this.doc.caretPositionFromPoint(x, y);
		range.setStart(position.offsetNode, position.offset);
	} else if(typeof document.caretRangeFromPoint !== "undefined" && !forceElement){
		range = this.doc.caretRangeFromPoint(x, y);
	} else {
		this.visibileEl = this.findElementAfter(x, y);
		range.setStart(this.visibileEl, 1);
	}

	// var test = this.doc.defaultView.getSelection();
	// var r = this.doc.createRange();
	// test.removeAllRanges();
	// r.setStart(range.startContainer, range.startOffset);
	// r.setEnd(range.startContainer, range.startOffset + 1);
	// test.addRange(r);
	return range;
};

/*
EPUBJS.Renderer.prototype.getVisibleRangeCfi = function(prevEl){
	var startX = 0;
	var startY = 0;
	var endX = this.width-1;
	var endY = this.height-1;
	var startRange = this.getRange(startX, startY);
	var endRange = this.getRange(endX, endY); //fix if carret not avail
	var startCfi = this.currentChapter.cfiFromRange(startRange);
	var endCfi;
	if(endRange) {
		endCfi = this.currentChapter.cfiFromRange(endRange);
	}

	return {
		start: startCfi,
		end: endCfi || false
	};
};
*/

EPUBJS.Renderer.prototype.pagesInCurrentChapter = function() {
	var pgs;
	var length;

	if(!this.pageMap) {
		console.warn("page map not loaded");
		return false;
	}

	length = this.pageMap.length;

	if(this.spreads){
		pgs = Math.ceil(length / 2);
	} else {
		pgs = length;
	}

	return pgs;
};

EPUBJS.Renderer.prototype.currentRenderedPage = function(){
	var pg;

	if(!this.pageMap) {
		console.warn("page map not loaded");
		return false;
	}

	if (this.spreads && this.layout.pageCount > 1) {
		pg = this.chapterPos*2;
	} else {
		pg = this.chapterPos;
	}

	return pg;
};

EPUBJS.Renderer.prototype.getRenderedPagesLeft = function(){
	var pg;
	var lastPage;
	var pagesLeft;

	if(!this.pageMap) {
		console.warn("page map not loaded");
		return false;
	}

	lastPage = this.pageMap.length;

	if (this.spreads) {
		pg = this.chapterPos*2;
	} else {
		pg = this.chapterPos;
	}

	pagesLeft = lastPage - pg;
	return pagesLeft;

};

EPUBJS.Renderer.prototype.getVisibleRangeCfi = function(){
	var pg;
	var startRange, endRange;

	if(!this.pageMap) {
		console.warn("page map not loaded");
		return false;
	}

	if (this.spreads) {
		pg = this.chapterPos*2;
		startRange = this.pageMap[pg-2];
		endRange = startRange;

		if(this.layout.pageCount > 1) {
			endRange = this.pageMap[pg-1];
		}
	} else {
		pg = this.chapterPos;
		startRange = this.pageMap[pg-1];
		endRange = startRange;
	}

	if(!startRange) {
		console.warn("page range miss:", pg, this.pageMap);
		startRange = this.pageMap[this.pageMap.length-1];
		endRange = startRange;
	}

	return {
		start: startRange.start,
		end: endRange.end
	};
};

// Goto a cfi position in the current chapter
EPUBJS.Renderer.prototype.gotoCfi = function(cfi){
	var pg;
	var marker;
	var range;

	if(this._moving){
		return this._q.enqueue("gotoCfi", arguments);
	}

	if(EPUBJS.core.isString(cfi)){
		cfi = this.epubcfi.parse(cfi);
	}

	if(typeof document.evaluate === 'undefined') {
		marker = this.epubcfi.addMarker(cfi, this.doc);
		if(marker) {
			pg = this.render.getPageNumberByElement(marker);
			// Must Clean up Marker before going to page
			this.epubcfi.removeMarker(marker, this.doc);
			this.page(pg);
		}
	} else {
		range = this.epubcfi.generateRangeFromCfi(cfi, this.doc);
		if(range) {
			// jaroslaw.bielski@7bulls.com
			// It seems that sometimes getBoundingClientRect() returns null for first page CFI in chapter.
			// It is always reproductible if few consecutive chapters have only one page.
			// NOTE: This is only workaround and the issue needs an deeper investigation.
			// NOTE: Observed on Android 4.2.1 using WebView widget as HTML renderer (Asus TF300T).
			var rect = range.getBoundingClientRect();
			if (rect) {
				pg = this.render.getPageNumberByRect(rect);

			} else {
				// Goto first page in chapter
				pg = 1;
			}

			this.page(pg);

			// Reset the current location cfi to requested cfi
			this.currentLocationCfi = cfi.str;
		} else {
			// Failed to find a range, go to first page
			this.page(1);
		}
	}
};

//  Walk nodes until a visible element is found
EPUBJS.Renderer.prototype.findFirstVisible = function(startEl){
	var el = startEl || this.render.getBaseElement();
	var	found;
	// kgolunski@7bulls.com
	// Looks like an old API usage
	// Set x and y as 0 to fullfill walk method API.
	found = this.walk(el, 0, 0);

	if(found) {
		return found;
	}else{
		return startEl;
	}

};
// TODO: remove me - unsused
EPUBJS.Renderer.prototype.findElementAfter = function(x, y, startEl){
	var el = startEl || this.render.getBaseElement();
	var	found;
	found = this.walk(el, x, y);
	if(found) {
		return found;
	}else{
		return el;
	}

};

/*
EPUBJS.Renderer.prototype.route = function(hash, callback){
	var location = window.location.hash.replace('#/', '');
	if(this.useHash && location.length && location != this.prevLocation){
		this.show(location, callback);
		this.prevLocation = location;
		return true;
	}
	return false;
}

EPUBJS.Renderer.prototype.hideHashChanges = function(){
	this.useHash = false;
}

*/

EPUBJS.Renderer.prototype.resize = function(width, height, setSize){
	var spreads;

	this.width = width;
	this.height = height;

	if(setSize !== false) {
		this.render.resize(this.width, this.height);
	}



	if(this.contents){
		this.reformat();
	}

	this.trigger("renderer:resized", {
		width: this.width,
		height: this.height
	});
};

//-- Listeners for events in the frame

EPUBJS.Renderer.prototype.onResized = function(e) {
	var width = this.container.clientWidth;
	var height = this.container.clientHeight;

	this.resize(width, height, false);
};

EPUBJS.Renderer.prototype.addEventListeners = function(){
	if(!this.render.document) {
		return;
	}
	this.listenedEvents.forEach(function(eventName){
		this.render.document.addEventListener(eventName, this.triggerEvent.bind(this), false);
	}, this);

};

EPUBJS.Renderer.prototype.removeEventListeners = function(){
	if(!this.render.document) {
		return;
	}
	this.listenedEvents.forEach(function(eventName){
		this.render.document.removeEventListener(eventName, this.triggerEvent, false);
	}, this);

};

// Pass browser events
EPUBJS.Renderer.prototype.triggerEvent = function(e){
	this.trigger("renderer:"+e.type, e);
};

EPUBJS.Renderer.prototype.addSelectionListeners = function(){
	this.render.document.addEventListener("selectionchange", this.onSelectionChange.bind(this), false);
};

EPUBJS.Renderer.prototype.removeSelectionListeners = function(){
	if(!this.render.document) {
		return;
	}
	this.doc.removeEventListener("selectionchange", this.onSelectionChange, false);
};

EPUBJS.Renderer.prototype.onSelectionChange = function(e){
	if (this.selectionEndTimeout) {
		clearTimeout(this.selectionEndTimeout);
	}
	this.selectionEndTimeout = setTimeout(function() {
		this.selectedRange = this.render.window.getSelection();
		this.trigger("renderer:selected", this.selectedRange);
	}.bind(this), 500);
};


//-- Spreads

EPUBJS.Renderer.prototype.setMinSpreadWidth = function(width){
	this.minSpreadWidth = width;
	this.spreads = this.determineSpreads(width);
};

EPUBJS.Renderer.prototype.determineSpreads = function(cutoff){
	if(this.isForcedSingle || !cutoff || this.width < cutoff) {
		return false; //-- Single Page
	}else{
		return true; //-- Double Page
	}
};

EPUBJS.Renderer.prototype.forceSingle = function(bool){
	if(bool) {
		this.isForcedSingle = true;
		// this.spreads = false;
	} else {
		this.isForcedSingle = false;
		// this.spreads = this.determineSpreads(this.minSpreadWidth);
	}
};

EPUBJS.Renderer.prototype.setGap = function(gap){
	this.gap = gap; //-- False == auto gap
};

EPUBJS.Renderer.prototype.setDirection = function(direction){
	this.direction = direction;
	this.render.setDirection(this.direction);
};

//-- Content Replacements

EPUBJS.Renderer.prototype.replace = function(query, func, finished, progress){
	var items = this.contents.querySelectorAll(query),
		resources = Array.prototype.slice.call(items),
		count = resources.length;


	if(count === 0) {
		finished(false);
		return;
	}
	resources.forEach(function(item){
		var called = false;
		var after = function(result, full){
			if(called === false) {
				count--;
				if(progress) progress(result, full, count);
				if(count <= 0 && finished) finished(true);
				called = true;
			}
		};

		func(item, after);

	}.bind(this));

};

//-- Enable binding events to Renderer
RSVP.EventTarget.mixin(EPUBJS.Renderer.prototype);

var EPUBJS = EPUBJS || {};
EPUBJS.replace = {};

//-- Replaces the relative links within the book to use our internal page changer
EPUBJS.replace.hrefs = function(callback, renderer){
	var book = this;
	var replacments = function(link, done){
		var href = link.getAttribute("href"),
				isRelative = href.search("://"),
				directory,
				relative,
				location;

		if(isRelative != -1){

			link.setAttribute("target", "_blank");

		}else{
		    // Links may need to be resolved, such as ../chp1.xhtml
            var uri = EPUBJS.core.uri(renderer.render.window.location.href);

            directory = uri.directory;

            if(directory) {
                // We must ensure that the file:// protocol is preserved for
                // local file links, as in certain contexts (such as under
                // Titanium), file links without the file:// protocol will not
                // work
                if (uri.protocol === "file") {
                    relative = EPUBJS.core.resolveUrl(uri.base, href);
                } else {
                    relative = EPUBJS.core.resolveUrl(directory, href);
                }
            } else {
                relative = href;
            }

			link.onclick = function(){
				book.goto(relative);
				return false;
			};

		}
		done();

	};

	renderer.replace("a[href]", replacments, callback);

};

EPUBJS.replace.head = function(callback, renderer) {

	renderer.replaceWithStored("link[href]", "href", EPUBJS.replace.links, callback);

};


//-- Replaces assets src's to point to stored version if browser is offline
EPUBJS.replace.resources = function(callback, renderer){
	//srcs = this.doc.querySelectorAll('[src]');
	renderer.replaceWithStored("[src]", "src", EPUBJS.replace.srcs, callback);

};

EPUBJS.replace.svg = function(callback, renderer) {

	renderer.replaceWithStored("image", "xlink:href", function(_store, full, done){
		_store.getUrl(full).then(done);
	}, callback);

};

EPUBJS.replace.srcs = function(_store, full, done){

	_store.getUrl(full).then(done);

};

//-- Replaces links in head, such as stylesheets - link[href]
EPUBJS.replace.links = function(_store, full, done, link){
	//-- Handle replacing urls in CSS
	if(link.getAttribute("rel") === "stylesheet") {
		EPUBJS.replace.stylesheets(_store, full).then(function(url, full){
			// done
			done(url, full);
		},  function(reason) {
			// we were unable to replace the style sheets
			done(null);
		});
	}else{
		_store.getUrl(full).then(done, function(reason) {
			// we were unable to get the url, signal to upper layer
			done(null);
		});
	}
};

EPUBJS.replace.stylesheets = function(_store, full) {
	var deferred = new RSVP.defer();

	if(!_store) return;

	_store.getText(full).then(function(text){
		var url;

		EPUBJS.replace.cssUrls(_store, full, text).then(function(newText){
			var _URL = window.URL || window.webkitURL || window.mozURL;

			var blob = new Blob([newText], { "type" : "text\/css" }),
					url = _URL.createObjectURL(blob);

			deferred.resolve(url);

		}, function(reason) {
			deferred.reject(reason);
		});

	}, function(reason) {
		deferred.reject(reason);
	});

	return deferred.promise;
};

EPUBJS.replace.cssUrls = function(_store, base, text){
	var deferred = new RSVP.defer(),
		promises = [],
		matches = text.match(/url\(\'?\"?([^\'|^\"^\)]*)\'?\"?\)/g);

	if(!_store) return;

	if(!matches){
		deferred.resolve(text);
		return deferred.promise;
	}

	matches.forEach(function(str){
		var full = EPUBJS.core.resolveUrl(base, str.replace(/url\(|[|\)|\'|\"]/g, ''));
		var replaced = _store.getUrl(full).then(function(url){
			text = text.replace(str, 'url("'+url+'")');
		}, function(reason) {
			deferred.reject(reason);
		});

		promises.push(replaced);
	});

	RSVP.all(promises).then(function(){
		deferred.resolve(text);
	});

	return deferred.promise;
};


EPUBJS.Storage = function(withCredentials){

	this.checkRequirements();
	this.urlCache = {};
	this.withCredentials = withCredentials;
	this.URL = window.URL || window.webkitURL || window.mozURL;
	this.offline = false;
};

//-- Load the zip lib and set the workerScriptsPath
EPUBJS.Storage.prototype.checkRequirements = function(callback){
	if(typeof(localforage) == "undefined") console.error("localForage library not loaded");
};

EPUBJS.Storage.prototype.put = function(assets, store) {
	var deferred = new RSVP.defer();
	var count = assets.length;
	var current = 0;
	var next = function(deferred){
		var done = deferred || new RSVP.defer();
		var url;
		var encodedUrl;

		if(current >= count) {
			done.resolve();
		} else {
			url = assets[current].url;
			encodedUrl = window.encodeURIComponent(url);

			EPUBJS.core.request(url, "binary")
			.then(function (data) {
				return localforage.setItem(encodedUrl, data);
			})
			.then(function(data){
				current++;
        // Load up the next
				setTimeout(function(){
					next(done);
				}, 1);

      });
		}
		return done.promise;
	}.bind(this);

	if(!Array.isArray(assets)) {
		assets = [assets];
	}

	next().then(function(){
		deferred.resolve();
	}.bind(this));

	return deferred.promise;
};

EPUBJS.Storage.prototype.token = function(url, value){
	var encodedUrl = window.encodeURIComponent(url);
	return localforage.setItem(encodedUrl, value)
		.then(function (result) {
			if (result === null) {
				return false;
			} else {
				return true;
			}
		});
};

EPUBJS.Storage.prototype.isStored = function(url){
	var encodedUrl = window.encodeURIComponent(url);
	return localforage.getItem(encodedUrl)
		.then(function (result) {
			if (result === null) {
				return false;
			} else {
				return true;
			}
		});
};

EPUBJS.Storage.prototype.getText = function(url){
	var encodedUrl = window.encodeURIComponent(url);

	return EPUBJS.core.request(url, 'arraybuffer', this.withCredentials)
		.then(function(buffer){

			if(this.offline){
				this.offline = false;
				this.trigger("offline", false);
			}
			localforage.setItem(encodedUrl, buffer);
			return buffer;
		}.bind(this))
		.then(function(data) {
			var deferred = new RSVP.defer();
			var mimeType = EPUBJS.core.getMimeType(url);
			var blob = new Blob([data], {type : mimeType});
			var reader = new FileReader();
			reader.addEventListener("loadend", function() {
				deferred.resolve(reader.result);
			});
			reader.readAsText(blob, mimeType);
			return deferred.promise;
		})
		.catch(function() {

			var deferred = new RSVP.defer();
			var entry = localforage.getItem(encodedUrl);

			if(!this.offline){
				this.offline = true;
				this.trigger("offline", true);
			}

			if(!entry) {
				deferred.reject({
					message : "File not found in the storage: " + url,
					stack : new Error().stack
				});
				return deferred.promise;
			}

			entry.then(function(data) {
				var mimeType = EPUBJS.core.getMimeType(url);
				var blob = new Blob([data], {type : mimeType});
				var reader = new FileReader();
				reader.addEventListener("loadend", function() {
					deferred.resolve(reader.result);
				});
				reader.readAsText(blob, mimeType);
			});

			return deferred.promise;
		}.bind(this));
};

EPUBJS.Storage.prototype.getUrl = function(url){
	var encodedUrl = window.encodeURIComponent(url);

	return EPUBJS.core.request(url, 'arraybuffer', this.withCredentials)
		.then(function(buffer){
			if(this.offline){
				this.offline = false;
				this.trigger("offline", false);
			}
			localforage.setItem(encodedUrl, buffer);
			return url;
		}.bind(this))
		.catch(function() {
			var deferred = new RSVP.defer();
			var entry;
			var _URL = window.URL || window.webkitURL || window.mozURL;
			var tempUrl;

			if(!this.offline){
				this.offline = true;
				this.trigger("offline", true);
			}

			if(encodedUrl in this.urlCache) {
				deferred.resolve(this.urlCache[encodedUrl]);
				return deferred.promise;
			}

			entry = localforage.getItem(encodedUrl);

			if(!entry) {
				deferred.reject({
					message : "File not found in the storage: " + url,
					stack : new Error().stack
				});
				return deferred.promise;
			}

			entry.then(function(data) {
				var blob = new Blob([data], {type : EPUBJS.core.getMimeType(url)});
				tempUrl = _URL.createObjectURL(blob);
				deferred.resolve(tempUrl);
				this.urlCache[encodedUrl] = tempUrl;
			}.bind(this));


			return deferred.promise;
	}.bind(this));
};

EPUBJS.Storage.prototype.getXml = function(url){
	var encodedUrl = window.encodeURIComponent(url);

	return EPUBJS.core.request(url, 'arraybuffer', this.withCredentials)
		.then(function(buffer){
			if(this.offline){
				this.offline = false;
				this.trigger("offline", false);
			}
			localforage.setItem(encodedUrl, buffer);
			return buffer;
		}.bind(this))
		.then(function(data) {
			var deferred = new RSVP.defer();
			var mimeType = EPUBJS.core.getMimeType(url);
			var blob = new Blob([data], {type : mimeType});
			var reader = new FileReader();
			reader.addEventListener("loadend", function() {
				var parser = new DOMParser();
				var doc = parser.parseFromString(reader.result, "text/xml");
				deferred.resolve(doc);
			});
			reader.readAsText(blob, mimeType);
			return deferred.promise;
		})
		.catch(function() {
			var deferred = new RSVP.defer();
			var entry = localforage.getItem(encodedUrl);

			if(!this.offline){
				this.offline = true;
				this.trigger("offline", true);
			}

			if(!entry) {
				deferred.reject({
					message : "File not found in the storage: " + url,
					stack : new Error().stack
				});
				return deferred.promise;
			}

			entry.then(function(data) {
				var mimeType = EPUBJS.core.getMimeType(url);
				var blob = new Blob([data], {type : mimeType});
				var reader = new FileReader();
				reader.addEventListener("loadend", function() {
					var parser = new DOMParser();
					var doc = parser.parseFromString(reader.result, "text/xml");
					deferred.resolve(doc);
				});
				reader.readAsText(blob, mimeType);
			});

			return deferred.promise;
		}.bind(this));
};

EPUBJS.Storage.prototype.revokeUrl = function(url){
	var _URL = window.URL || window.webkitURL || window.mozURL;
	var fromCache = this.urlCache[url];
	if(fromCache) _URL.revokeObjectURL(fromCache);
};

EPUBJS.Storage.prototype.failed = function(error){
	console.error(error);
};

RSVP.EventTarget.mixin(EPUBJS.Storage.prototype);

EPUBJS.Unarchiver = function(url){

	this.checkRequirements();
	this.urlCache = {};

};

//-- Load the zip lib and set the workerScriptsPath
EPUBJS.Unarchiver.prototype.checkRequirements = function(callback){
	if(typeof(JSZip) == "undefined") console.error("JSZip lib not loaded");
};

EPUBJS.Unarchiver.prototype.open = function(zipUrl, callback){
	var deferred = new RSVP.defer();

	return EPUBJS.core.request(zipUrl, "binary").then(function(data){
		this.zip = new JSZip(data);
	}.bind(this));
};

EPUBJS.Unarchiver.prototype.getXml = function(url, encoding){
	var decodededUrl = window.decodeURIComponent(url);
	return this.getText(decodededUrl, encoding).
			then(function(text){
				var parser = new DOMParser();
				return parser.parseFromString(text, "text/xml");
			});

};

EPUBJS.Unarchiver.prototype.getUrl = function(url, mime){
	var unarchiver = this;
	var deferred = new RSVP.defer();
	var decodededUrl = window.decodeURIComponent(url);
	var entry = this.zip.file(decodededUrl);
	var _URL = window.URL || window.webkitURL || window.mozURL;
	var tempUrl;
	var blob;
	
	if(!entry) {
		deferred.reject({
			message : "File not found in the epub: " + url,
			stack : new Error().stack
		});
		return deferred.promise;
	}

	if(url in this.urlCache) {
		deferred.resolve(this.urlCache[url]);
		return deferred.promise;
	}

	blob = new Blob([entry.asUint8Array()], {type : EPUBJS.core.getMimeType(entry.name)});

	tempUrl = _URL.createObjectURL(blob);
	deferred.resolve(tempUrl);
	unarchiver.urlCache[url] = tempUrl;

	return deferred.promise;
};

EPUBJS.Unarchiver.prototype.getText = function(url, encoding){
	var unarchiver = this;
	var deferred = new RSVP.defer();
	var decodededUrl = window.decodeURIComponent(url);
	var entry = this.zip.file(decodededUrl);
	var text;

	if(!entry) {
		deferred.reject({
			message : "File not found in the epub: " + url,
			stack : new Error().stack
		});
		return deferred.promise;
	}

	text = entry.asText();
	deferred.resolve(text);

	return deferred.promise;
};

EPUBJS.Unarchiver.prototype.revokeUrl = function(url){
	var _URL = window.URL || window.webkitURL || window.mozURL;
	var fromCache = this.urlCache[url];
	if(fromCache) _URL.revokeObjectURL(fromCache);
};

EPUBJS.Unarchiver.prototype.failed = function(error){
	console.error(error);
};

EPUBJS.Unarchiver.prototype.afterSaved = function(error){
	this.callback();
};

EPUBJS.Unarchiver.prototype.toStorage = function(entries){
	var timeout = 0,
		delay = 20,
		that = this,
		count = entries.length;

	function callback(){
		count--;
		if(count === 0) that.afterSaved();
	}

	entries.forEach(function(entry){

		setTimeout(function(entry){
			that.saveEntryFileToStorage(entry, callback);
		}, timeout, entry);

		timeout += delay;
	});

	console.log("time", timeout);

	//entries.forEach(this.saveEntryFileToStorage.bind(this));
};

// EPUBJS.Unarchiver.prototype.saveEntryFileToStorage = function(entry, callback){
// 	var that = this;
// 	entry.getData(new zip.BlobWriter(), function(blob) {
// 		EPUBJS.storage.save(entry.filename, blob, callback);
// 	});
// };

/*
 From Zip.js, by Gildas Lormeau
 */

(function() {
	"use strict";
	var table = {
		"application" : {
			"ecmascript" : [ "es", "ecma" ],
			"javascript" : "js",
			"ogg" : "ogx",
			"pdf" : "pdf",
			"postscript" : [ "ps", "ai", "eps", "epsi", "epsf", "eps2", "eps3" ],
			"rdf+xml" : "rdf",
			"smil" : [ "smi", "smil" ],
			"xhtml+xml" : [ "xhtml", "xht" ],
			"xml" : [ "xml", "xsl", "xsd" ],
			"zip" : "zip",
			"x-httpd-eruby" : "rhtml",
			"x-latex" : "latex",
			"x-maker" : [ "frm", "maker", "frame", "fm", "fb", "book", "fbdoc" ],
			"x-object" : "o",
			"x-shockwave-flash" : [ "swf", "swfl" ],
			"x-silverlight" : "scr",
			"epub+zip" : "epub",
			"font-tdpfr" : "pfr",
			"inkml+xml" : [ "ink", "inkml" ],
			"json" : "json",
			"jsonml+json" : "jsonml",
			"mathml+xml" : "mathml",
			"metalink+xml" : "metalink",
			"mp4" : "mp4s",
			"oebps-package+xml" : "opf",
			"omdoc+xml" : "omdoc",
			"oxps" : "oxps",
			"vnd.amazon.ebook" : "azw",
			"widget" : "wgt",
			"x-dtbncx+xml" : "ncx",
			"x-dtbook+xml" : "dtb",
			"x-dtbresource+xml" : "res",
			"x-font-bdf" : "bdf",
			"x-font-ghostscript" : "gsf",
			"x-font-linux-psf" : "psf",
			"x-font-otf" : "otf",
			"x-font-pcf" : "pcf",
			"x-font-snf" : "snf",
			"x-font-ttf" : [ "ttf", "ttc" ],
			"x-font-type1" : [ "pfa", "pfb", "pfm", "afm" ],
			"x-font-woff" : "woff",
			"x-mobipocket-ebook" : [ "prc", "mobi" ],
			"x-mspublisher" : "pub",
			"x-nzb" : "nzb",
			"x-tgif" : "obj",
			"xaml+xml" : "xaml",
			"xml-dtd" : "dtd",
			"xproc+xml" : "xpl",
			"xslt+xml" : "xslt",
			"internet-property-stream" : "acx",
			"x-compress" : "z",
			"x-compressed" : "tgz",
			"x-gzip" : "gz",
		},
		"audio" : {
			"flac" : "flac",
			"midi" : [ "mid", "midi", "kar", "rmi" ],
			"mpeg" : [ "mpga", "mpega", "mp2", "mp3", "m4a", "mp2a", "m2a", "m3a" ],
			"mpegurl" : "m3u",
			"ogg" : [ "oga", "ogg", "spx" ],
			"x-aiff" : [ "aif", "aiff", "aifc" ],
			"x-ms-wma" : "wma",
			"x-wav" : "wav",
			"adpcm" : "adp",
			"mp4" : "mp4a",
			"webm" : "weba",
			"x-aac" : "aac",
			"x-caf" : "caf",
			"x-matroska" : "mka",
			"x-pn-realaudio-plugin" : "rmp",
			"xm" : "xm",
			"mid" : [ "mid", "rmi" ]
		},
		"image" : {
			"gif" : "gif",
			"ief" : "ief",
			"jpeg" : [ "jpeg", "jpg", "jpe" ],
			"pcx" : "pcx",
			"png" : "png",
			"svg+xml" : [ "svg", "svgz" ],
			"tiff" : [ "tiff", "tif" ],
			"x-icon" : "ico",
			"bmp" : "bmp",
			"webp" : "webp",
			"x-pict" : [ "pic", "pct" ],
			"x-tga" : "tga",
			"cis-cod" : "cod",
		},
		"message" : {
			"rfc822" : [ "eml", "mime", "mht", "mhtml", "nws" ]
		},
		"text" : {
			"cache-manifest" : [ "manifest", "appcache" ],
			"calendar" : [ "ics", "icz", "ifb" ],
			"css" : "css",
			"csv" : "csv",
			"h323" : "323",
			"html" : [ "html", "htm", "shtml", "stm" ],
			"iuls" : "uls",
			"mathml" : "mml",
			"plain" : [ "txt", "text", "brf", "conf", "def", "list", "log", "in", "bas" ],
			"richtext" : "rtx",
			"tab-separated-values" : "tsv",
			"x-bibtex" : "bib",
			"x-dsrc" : "d",
			"x-diff" : [ "diff", "patch" ],
			"x-haskell" : "hs",
			"x-java" : "java",
			"x-literate-haskell" : "lhs",
			"x-moc" : "moc",
			"x-pascal" : [ "p", "pas" ],
			"x-pcs-gcd" : "gcd",
			"x-perl" : [ "pl", "pm" ],
			"x-python" : "py",
			"x-scala" : "scala",
			"x-setext" : "etx",
			"x-tcl" : [ "tcl", "tk" ],
			"x-tex" : [ "tex", "ltx", "sty", "cls" ],
			"x-vcard" : "vcf",
			"sgml" : [ "sgml", "sgm" ],
			"x-c" : [ "c", "cc", "cxx", "cpp", "h", "hh", "dic" ],
			"x-fortran" : [ "f", "for", "f77", "f90" ],
			"x-opml" : "opml",
			"x-nfo" : "nfo",
			"x-sfv" : "sfv",
			"x-uuencode" : "uu",
			"webviewhtml" : "htt"
		},
		"video" : {
			"mpeg" : [ "mpeg", "mpg", "mpe", "m1v", "m2v", "mp2", "mpa", "mpv2" ],
			"mp4" : [ "mp4", "mp4v", "mpg4" ],
			"quicktime" : [ "qt", "mov" ],
			"ogg" : "ogv",
			"vnd.mpegurl" : [ "mxu", "m4u" ],
			"x-flv" : "flv",
			"x-la-asf" : [ "lsf", "lsx" ],
			"x-mng" : "mng",
			"x-ms-asf" : [ "asf", "asx", "asr" ],
			"x-ms-wm" : "wm",
			"x-ms-wmv" : "wmv",
			"x-ms-wmx" : "wmx",
			"x-ms-wvx" : "wvx",
			"x-msvideo" : "avi",
			"x-sgi-movie" : "movie",
			"x-matroska" : [ "mpv", "mkv", "mk3d", "mks" ],
			"3gpp2" : "3g2",
			"h261" : "h261",
			"h263" : "h263",
			"h264" : "h264",
			"jpeg" : "jpgv",
			"jpm" : [ "jpm", "jpgm" ],
			"mj2" : [ "mj2", "mjp2" ],
			"vnd.ms-playready.media.pyv" : "pyv",
			"vnd.uvvu.mp4" : [ "uvu", "uvvu" ],
			"vnd.vivo" : "viv",
			"webm" : "webm",
			"x-f4v" : "f4v",
			"x-m4v" : "m4v",
			"x-ms-vob" : "vob",
			"x-smv" : "smv"
		}
	};

	var mimeTypes = (function() {
		var type, subtype, val, index, mimeTypes = {};
		for (type in table) {
			if (table.hasOwnProperty(type)) {
				for (subtype in table[type]) {
					if (table[type].hasOwnProperty(subtype)) {
						val = table[type][subtype];
						if (typeof val == "string") {
							mimeTypes[val] = type + "/" + subtype;
						} else {
							for (index = 0; index < val.length; index++) {
								mimeTypes[val[index]] = type + "/" + subtype;
							}
						}
					}
				}
			}
		}
		return mimeTypes;
	})();

	EPUBJS.core.getMimeType = function(filename) {
		var defaultValue = "text/plain";//"application/octet-stream";
		return filename && mimeTypes[filename.split(".").pop().toLowerCase()] || defaultValue;
	};

})();
//# sourceMappingURL=epub.js.map