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improved knockout observableArray with all Array.prototype functions

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djmaze 2020-11-03 15:53:50 +01:00
parent 6e84334b09
commit bdd68d0d8f
5 changed files with 226 additions and 253 deletions
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72
vendors/knockout/src/subscribables/subscribable.js vendored
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@ -1,30 +1,35 @@
ko.subscription = function (target, callback, disposeCallback) {
this._target = target;
this._callback = callback;
this._disposeCallback = disposeCallback;
this._isDisposed = false;
this._node = null;
this._domNodeDisposalCallback = null;
ko.exportProperty(this, 'dispose', this.dispose);
ko.exportProperty(this, 'disposeWhenNodeIsRemoved', this.disposeWhenNodeIsRemoved);
};
ko.subscription.prototype.dispose = function () {
var self = this;
if (!self._isDisposed) {
if (self._domNodeDisposalCallback) {
ko.utils.domNodeDisposal.removeDisposeCallback(self._node, self._domNodeDisposalCallback);
}
self._isDisposed = true;
self._disposeCallback();
self._target = self._callback = self._disposeCallback = self._node = self._domNodeDisposalCallback = null;
class koSubscription
{
constructor (target, callback, disposeCallback) {
this._target = target;
this._callback = callback;
this._disposeCallback = disposeCallback;
this._isDisposed = false;
this._node = null;
this._domNodeDisposalCallback = null;
ko.exportProperty(this, 'dispose', this.dispose);
ko.exportProperty(this, 'disposeWhenNodeIsRemoved', this.disposeWhenNodeIsRemoved);
}
};
ko.subscription.prototype.disposeWhenNodeIsRemoved = function (node) {
this._node = node;
ko.utils.domNodeDisposal.addDisposeCallback(node, this._domNodeDisposalCallback = this.dispose.bind(this));
};
dispose() {
var self = this;
if (!self._isDisposed) {
if (self._domNodeDisposalCallback) {
ko.utils.domNodeDisposal.removeDisposeCallback(self._node, self._domNodeDisposalCallback);
}
self._isDisposed = true;
self._disposeCallback();
self._target = self._callback = self._disposeCallback = self._node = self._domNodeDisposalCallback = null;
}
}
disposeWhenNodeIsRemoved(node) {
this._node = node;
ko.utils.domNodeDisposal.addDisposeCallback(node, this._domNodeDisposalCallback = this.dispose.bind(this));
}
}
ko.subscribable = function () {
Object.setPrototypeOf(this, ko_subscribable_fn);
@ -45,7 +50,7 @@ var ko_subscribable_fn = {
event = event || defaultEvent;
var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
var subscription = new ko.subscription(self, boundCallback, () => {
var subscription = new koSubscription(self, boundCallback, () => {
ko.utils.arrayRemoveItem(self._subscriptions[event], subscription);
if (self.afterSubscriptionRemove)
self.afterSubscriptionRemove(event);
@ -70,7 +75,8 @@ var ko_subscribable_fn = {
var subs = event === defaultEvent && this._changeSubscriptions || this._subscriptions[event].slice(0);
try {
ko.dependencyDetection.begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)
for (var i = 0, subscription; subscription = subs[i]; ++i) {
var i = 0, subscription;
while ((subscription = subs[i++])) {
// In case a subscription was disposed during the arrayForEach cycle, check
// for isDisposed on each subscription before invoking its callback
if (!subscription._isDisposed)
@ -159,17 +165,6 @@ var ko_subscribable_fn = {
return this._subscriptions[event] && this._subscriptions[event].length;
},
getSubscriptionsCount: function (event) {
if (event) {
return this._subscriptions[event] && this._subscriptions[event].length || 0;
}
var total = 0;
ko.utils.objectForEach(this._subscriptions, (eventName, subscriptions) =>
total += subscriptions.length
);
return total;
},
isDifferent: function(oldValue, newValue) {
return !this['equalityComparer'] || !this['equalityComparer'](oldValue, newValue);
},
@ -182,7 +177,6 @@ var ko_subscribable_fn = {
ko.exportProperty(ko_subscribable_fn, 'init', ko_subscribable_fn.init);
ko.exportProperty(ko_subscribable_fn, 'subscribe', ko_subscribable_fn.subscribe);
ko.exportProperty(ko_subscribable_fn, 'extend', ko_subscribable_fn.extend);
ko.exportProperty(ko_subscribable_fn, 'getSubscriptionsCount', ko_subscribable_fn.getSubscriptionsCount);
// For browsers that support proto assignment, we overwrite the prototype of each
// observable instance. Since observables are functions, we need Function.prototype