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| System.register(['./environment', './array-change-records', './collection-observation'], function (_export) {
'use strict';
var hasArrayObserve, projectArraySplices, ModifyCollectionObserver, CollectionLengthObserver, arrayProto, ModifyArrayObserver, ArrayObserveObserver;
_export('getArrayObserver', getArrayObserver);
function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
function _inherits(subClass, superClass) { Iif (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); Eif (superClass) subClass.__proto__ = superClass; }
function getArrayObserver(taskQueue, array) {
Eif (hasArrayObserve) {
return new ArrayObserveObserver(array);
} else {
return ModifyArrayObserver.create(taskQueue, array);
}
}
return {
setters: [function (_environment) {
hasArrayObserve = _environment.hasArrayObserve;
}, function (_arrayChangeRecords) {
projectArraySplices = _arrayChangeRecords.projectArraySplices;
}, function (_collectionObservation) {
ModifyCollectionObserver = _collectionObservation.ModifyCollectionObserver;
CollectionLengthObserver = _collectionObservation.CollectionLengthObserver;
}],
execute: function () {
arrayProto = Array.prototype;
ModifyArrayObserver = (function (_ModifyCollectionObserver) {
function ModifyArrayObserver(taskQueue, array) {
_classCallCheck(this, ModifyArrayObserver);
_ModifyCollectionObserver.call(this, taskQueue, array);
}
_inherits(ModifyArrayObserver, _ModifyCollectionObserver);
ModifyArrayObserver.create = function create(taskQueue, array) {
var observer = new ModifyArrayObserver(taskQueue, array);
array['pop'] = function () {
var methodCallResult = arrayProto['pop'].apply(array, arguments);
observer.addChangeRecord({
type: 'delete',
object: array,
name: array.length,
oldValue: methodCallResult
});
return methodCallResult;
};
array['push'] = function () {
var methodCallResult = arrayProto['push'].apply(array, arguments);
observer.addChangeRecord({
type: 'splice',
object: array,
index: array.length - arguments.length,
removed: [],
addedCount: arguments.length
});
return methodCallResult;
};
array['reverse'] = function () {
var oldArray = array.slice();
var methodCallResult = arrayProto['reverse'].apply(array, arguments);
observer.reset(oldArray);
return methodCallResult;
};
array['shift'] = function () {
var methodCallResult = arrayProto['shift'].apply(array, arguments);
observer.addChangeRecord({
type: 'delete',
object: array,
name: 0,
oldValue: methodCallResult
});
return methodCallResult;
};
array['sort'] = function () {
var oldArray = array.slice();
var methodCallResult = arrayProto['sort'].apply(array, arguments);
observer.reset(oldArray);
return methodCallResult;
};
array['splice'] = function () {
var methodCallResult = arrayProto['splice'].apply(array, arguments);
observer.addChangeRecord({
type: 'splice',
object: array,
index: arguments[0],
removed: methodCallResult,
addedCount: arguments.length > 2 ? arguments.length - 2 : 0
});
return methodCallResult;
};
array['unshift'] = function () {
var methodCallResult = arrayProto['unshift'].apply(array, arguments);
observer.addChangeRecord({
type: 'splice',
object: array,
index: 0,
removed: [],
addedCount: arguments.length
});
return methodCallResult;
};
return observer;
};
return ModifyArrayObserver;
})(ModifyCollectionObserver);
ArrayObserveObserver = (function () {
function ArrayObserveObserver(array) {
_classCallCheck(this, ArrayObserveObserver);
this.array = array;
this.callbacks = [];
}
ArrayObserveObserver.prototype.subscribe = function subscribe(callback) {
var _this = this;
var callbacks = this.callbacks;
Eif (callbacks.length === 0) {
this.handler = this.handleChanges.bind(this);
Array.observe(this.array, this.handler);
}
callbacks.push(callback);
return function () {
callbacks.splice(callbacks.indexOf(callback), 1);
Eif (callbacks.length === 0) {
Array.unobserve(_this.array, _this.handler);
}
};
};
ArrayObserveObserver.prototype.getLengthObserver = function getLengthObserver() {
return this.lengthObserver || (this.lengthObserver = new CollectionLengthObserver(this.array));
};
ArrayObserveObserver.prototype.handleChanges = function handleChanges(changeRecords) {
var callbacks = this.callbacks,
i = callbacks.length,
splices;
Eif (i) {
splices = projectArraySplices(this.array, changeRecords);
while (i--) {
callbacks[i](splices);
}
}
Iif (this.lengthObserver) {
this.lengthObserver.call(this.array.length);
}
};
return ArrayObserveObserver;
})();
}
};
});
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array.slice();\n      var methodCallResult = arrayProto['sort'].apply(array, arguments);\n      observer.reset(oldArray);\n      return methodCallResult;\n    };\n\n    array['splice'] = function() {\n      var methodCallResult = arrayProto['splice'].apply(array, arguments);\n      observer.addChangeRecord({\n       type: 'splice',\n       object: array,\n       index: arguments[0],\n       removed: methodCallResult,\n       addedCount: arguments.length > 2 ? arguments.length - 2 : 0\n      });\n      return methodCallResult;\n    };\n\n    array['unshift'] = function() {\n      var methodCallResult = arrayProto['unshift'].apply(array, arguments);\n      observer.addChangeRecord({\n       type: 'splice',\n       object: array,\n       index: 0,\n       removed: [],\n       addedCount: arguments.length\n      });\n      return methodCallResult;\n    };\n\n    return observer;\n  }\n}\n\nclass ArrayObserveObserver {\n  constructor(array){\n    this.array = array;\n    this.callbacks = [];\n  }\n\n  subscribe(callback){\n    var callbacks = this.callbacks;\n\n    if(callbacks.length === 0){\n      this.handler = this.handleChanges.bind(this);\n      Array.observe(this.array, this.handler);\n    }\n\n    callbacks.push(callback);\n\n    return () => {\n      callbacks.splice(callbacks.indexOf(callback), 1);\n      if (callbacks.length === 0) {\n        Array.unobserve(this.array, this.handler)\n      }\n    };\n  }\n\n  getLengthObserver(){\n    return this.lengthObserver || (this.lengthObserver = new CollectionLengthObserver(this.array));\n  }\n\n  handleChanges(changeRecords){\n    var callbacks = this.callbacks,\n        i = callbacks.length,\n        splices;\n\n    if(i){\n      splices = projectArraySplices(this.array, changeRecords);\n\n      while(i--) {\n        callbacks[i](splices);\n      }\n    }\n\n    if(this.lengthObserver){\n      this.lengthObserver.call(this.array.length);\n    }\n  }\n}\n"]} |