443 lines
14 KiB
JavaScript
443 lines
14 KiB
JavaScript
/**
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* The outline of a ignite property which is a managed property that
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* can be used to invoke call back functions when the value of the property changes.
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* @ignore
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*/
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class IgniteProperty {
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constructor(val, onChange = null) {
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this.onChangeCallbacks = [];
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this.onPushCallbacks = [];
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this.onPopCallbacks = [];
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this.onShiftCallbacks = [];
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this.onUnshiftCallbacks = [];
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this.onSpliceCallbacks = [];
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this.arrayCallbacks = [];
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this.reflected = [];
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this._value = val;
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this.ignoreValueChange = false;
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//If we were passed an onchange function attach it.
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if (onChange) {
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this.attachOnChange(onChange);
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}
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//Attempt to patch the value if it's a list.
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this.patchArray();
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}
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get value() {
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return this._value;
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}
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set value(val) {
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this.setValue(val, true);
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}
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setValue(val, reflect) {
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//If the ignore value change flag is set exit.
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if (this.ignoreValueChange) {
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return;
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}
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//If the current value is the same as the old value don't do anything.
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if (this._value === val) {
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return;
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}
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//Get the old value
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var old = this._value;
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//Based on the old value, see if we need to convert the new value to match the original type.
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if (typeof old === typeof true) {
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val = val != null && val != undefined ? val.toString().toLowerCase().trim() : val;
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val = val == "true" || val == "1" || val == "yes" || val == "t" || val == "y";
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} else if (typeof old === typeof 0) {
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val = Number(val != null && val != undefined ? val.toString().trim() : "0");
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val = isNaN(val) ? 0 : val;
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} else if (typeof old === typeof "") {
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val = val != null && val != undefined ? val.toString() : null;
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}
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//Set the new value
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this._value = val;
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//Attempt to patch the value if it's an array.
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this.patchArray();
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//Invoke any callbacks letting them know the value changed.
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this.invokeOnChange(old, val, reflect);
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}
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patchArray() {
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//Disconnect any existing array callbacks
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if (this.arrayCallbacks.length > 0) {
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this.arrayCallbacks.forEach(callback => callback.disconnect());
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this.arrayCallbacks = [];
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}
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//If our value is an array and it hasn't been patched, then patch it.
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if (Array.isArray(this._value) && this._value.onPushCallbacks == undefined) {
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this._value.onPushCallbacks = [];
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this._value.onPopCallbacks = [];
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this._value.onShiftCallbacks = [];
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this._value.onUnshiftCallbacks = [];
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this._value.onSpliceCallbacks = [];
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this._value.push = function () {
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var len = Array.prototype.push.apply(this, arguments);
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this.onPushCallbacks.forEach(callback => callback.invoke(Array.from(arguments)));
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return len;
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};
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this._value.pop = function () {
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var len = Array.prototype.pop.apply(this, arguments);
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this.onPopCallbacks.forEach(callback => callback.invoke());
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return len;
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}
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this._value.unshift = function () {
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var len = Array.prototype.unshift.apply(this, arguments);
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this.onUnshiftCallbacks.forEach(callback => callback.invoke(Array.from(arguments)));
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return len;
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}
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this._value.shift = function () {
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var len = Array.prototype.shift.apply(this, arguments);
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this.onShiftCallbacks.forEach(callback => callback.invoke());
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return len;
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};
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this._value.splice = function (start, deleteCount = 0, ...items) {
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var removed = Array.prototype.splice.apply(this, arguments);
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this.onSpliceCallbacks.forEach(callback => callback.invoke(start, deleteCount, items));
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return removed;
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}
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this._value.attachOnPush = function (func) {
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var callback = new IgniteCallback(func, detach => this.detachOnPush(detach));
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this.onPushCallbacks.push(callback);
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return callback;
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}
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this._value.attachOnPop = function (func) {
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var callback = new IgniteCallback(func, detach => this.detachOnPop(detach));
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this.onPopCallbacks.push(callback);
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return callback;
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}
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this._value.attachOnUnshift = function (func) {
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var callback = new IgniteCallback(func, detach => this.detachOnUnshift(detach));
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this.onUnshiftCallbacks.push(callback);
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return callback;
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}
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this._value.attachOnShift = function (func) {
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var callback = new IgniteCallback(func, detach => this.detachOnShift(detach));
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this.onShiftCallbacks.push(callback);
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return callback;
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}
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this._value.attachOnSplice = function (func) {
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var callback = new IgniteCallback(func, detach => this.detachOnSplice(detach));
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this.onSpliceCallbacks.push(callback);
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return callback;
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}
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this._value.detachOnPush = function (callback) {
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this.onPushCallbacks = this.onPushCallbacks.filter(push => push != callback);
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}
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this._value.detachOnPop = function (callback) {
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this.onPopCallbacks = this.onPopCallbacks.filter(pop => pop != callback);
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}
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this._value.detachOnUnshift = function (callback) {
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this.onUnshiftCallbacks = this.onUnshiftCallbacks.filter(unshift => unshift != callback);
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}
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this._value.detachOnShift = function (callback) {
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this.onShiftCallbacks = this.onShiftCallbacks.filter(shift => shift != callback);
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}
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this._value.detachOnSplice = function (callback) {
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this.onSpliceCallbacks = this.onSpliceCallbacks.filter(slice => slice != callback);
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}
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}
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if (Array.isArray(this._value) && this._value.onPushCallbacks) {
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//This array has already been patched but attach to it so we get callbacks.
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this.arrayCallbacks.push(this._value.attachOnPush((items) => this.invokeOnPush(items)));
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this.arrayCallbacks.push(this._value.attachOnPop(() => this.invokeOnPop()));
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this.arrayCallbacks.push(this._value.attachOnShift(() => this.invokeOnShift()));
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this.arrayCallbacks.push(this._value.attachOnUnshift((items) => this.invokeOnUnshift(items)));
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this.arrayCallbacks.push(this._value.attachOnSplice((start, deleteCount, items) => this.invokeOnSplice(start, deleteCount, items)));
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}
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}
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reflect() {
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this.ignoreValueChange = true; //Ignore changes incase we are connected to any reflected properties.
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this.reflected.forEach(reflect => reflect instanceof Function ? reflect(this._value) : (reflect.value = this._value));
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this.ignoreValueChange = false;
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}
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invokeOnChange(oldValue, newValue, reflect = true) {
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//Enter a new rendering context since this event may contain code that expects a new context.
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IgniteRenderingContext.push();
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if (reflect) {
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this.reflect();
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}
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this.onChangeCallbacks.forEach(callback => callback.invoke(oldValue, newValue));
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IgniteRenderingContext.pop();
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}
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invokeOnPush(items, reflect = true) {
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IgniteRenderingContext.push();
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if (reflect) {
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this.reflect();
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}
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this.onPushCallbacks.forEach(callback => callback.invoke(this._value, items));
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IgniteRenderingContext.pop();
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}
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invokeOnPop(reflect = true) {
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IgniteRenderingContext.push();
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if (reflect) {
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this.reflect();
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}
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this.onPopCallbacks.forEach(callback => callback.invoke(this._value));
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IgniteRenderingContext.pop();
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}
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invokeOnShift(reflect = true) {
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IgniteRenderingContext.push();
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if (reflect) {
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this.reflect();
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}
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this.onShiftCallbacks.forEach(callback => callback.invoke(this._value));
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IgniteRenderingContext.pop();
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}
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invokeOnUnshift(items, reflect = true) {
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IgniteRenderingContext.push();
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if (reflect) {
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this.reflect();
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}
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this.onUnshiftCallbacks.forEach(callback => callback.invoke(this._value, items));
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IgniteRenderingContext.pop();
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}
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invokeOnSplice(start, deleteCount, items, reflect = true) {
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IgniteRenderingContext.push();
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if (reflect) {
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this.reflect();
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}
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this.onSpliceCallbacks.forEach(callback => callback.invoke(this._value, start, deleteCount, items));
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IgniteRenderingContext.pop();
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}
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attachOnChange(onChange) {
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var callback = new IgniteCallback(onChange, detach => this.detachOnChange(detach));
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this.onChangeCallbacks.push(callback);
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return callback;
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}
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attachOnPush(onPush) {
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var callback = new IgniteCallback(onPush, detach => this.detachOnPush(detach));
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this.onPushCallbacks.push(callback);
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return callback;
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}
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attachOnPop(onPop) {
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var callback = new IgniteCallback(onPop, detach => this.detachOnPop(detach));
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this.onPopCallbacks.push(callback);
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return callback;
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}
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attachOnShift(onShift) {
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var callback = new IgniteCallback(onShift, detach => this.detachOnShift(detach));
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this.onShiftCallbacks.push(callback);
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return callback;
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}
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attachOnUnshift(onUnshift) {
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var callback = new IgniteCallback(onUnshift, detach => this.detachOnUnshift(detach));
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this.onUnshiftCallbacks.push(callback);
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return callback;
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}
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attachOnSplice(onSplice) {
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var callback = new IgniteCallback(onSplice, detach => this.detachOnSplice(detach));
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this.onSpliceCallbacks.push(callback);
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return callback;
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}
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detachOnChange(callback) {
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this.onChangeCallbacks = this.onChangeCallbacks.filter(change => change != callback);
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}
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detachOnPush(callback) {
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this.onPushCallbacks = this.onPushCallbacks.filter(push => push != callback);
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}
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detachOnPop(callback) {
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this.onPopCallbacks = this.onPopCallbacks.filter(pop => pop != callback);
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}
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detachOnShift(callback) {
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this.onShiftCallbacks = this.onShiftCallbacks.filter(shift => shift != callback);
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}
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detachOnUnshift(callback) {
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this.onUnshiftCallbacks = this.onUnshiftCallbacks.filter(unshift => unshift != callback);
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}
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detachOnSplice(callback) {
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this.onSpliceCallbacks = this.onSpliceCallbacks.filter(slice => slice != callback);
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}
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}
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/**
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* Return the value of the property if we try to convert
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* the property to a string.
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*/
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IgniteProperty.prototype.toString = function () {
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return this.value.toString();
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}
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/**
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* Add a prototype to help get property values from an array
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*/
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Array.prototype.getPropertyValues = function () {
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var ret = [];
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this.forEach(prop => {
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if (prop instanceof IgniteProperty) {
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ret.push(prop.value);
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} else {
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ret.push(prop);
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}
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});
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return ret;
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}
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/**
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* Add a prototype to help get old property values from an array
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*/
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Array.prototype.getOldPropertyValues = function (property, oldValue) {
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var ret = [];
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this.forEach(prop => {
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if (prop == property) {
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ret.push(oldValue);
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} else {
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if (prop instanceof IgniteProperty) {
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ret.push(prop.value);
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} else {
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ret.push(prop);
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}
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}
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});
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return ret;
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}
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/**
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* The outline of a ignite callback that can be invoked and disconnected
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* to help maintain and cleanup callbacks.
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* @ignore
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*/
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class IgniteCallback {
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constructor(callback, detach) {
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this.callback = callback;
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this.detach = detach;
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}
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invoke(...params) {
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if (this.callback) {
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this.callback(...params);
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}
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}
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disconnect() {
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this.callback = null;
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if (this.detach) {
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this.detach(this);
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}
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}
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}
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/**
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* The outline of a simple rendering context which allows us to
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* know if we are currently rendering anything ignite related. This works
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* because Javascript is single threaded, if events could break the current execution
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* this would fail. But it's safe since events cannot do that.
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* @ignore
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*/
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class IgniteRenderingContext {
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static enter() {
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if (!IgniteRenderingContext.RenderCount) {
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IgniteRenderingContext.RenderCount = 0;
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}
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IgniteRenderingContext.RenderCount++;
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}
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static leave() {
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if (IgniteRenderingContext.RenderCount) {
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IgniteRenderingContext.RenderCount--;
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}
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}
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static push() {
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if (IgniteRenderingContext.Stack == null) {
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IgniteRenderingContext.Stack = [];
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}
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IgniteRenderingContext.Stack.push(IgniteRenderingContext.RenderCount);
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IgniteRenderingContext.RenderCount = 0;
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}
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static pop() {
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if (IgniteRenderingContext.Stack && IgniteRenderingContext.Stack.length > 0) {
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IgniteRenderingContext.RenderCount = IgniteRenderingContext.Stack.pop();
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}
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}
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static ready(callback) {
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//Setup the callbacks if it's not init'd.
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if (!IgniteRenderingContext.ReadyCallbacks) {
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IgniteRenderingContext.ReadyCallbacks = [];
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}
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//Add this ignite callback.
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IgniteRenderingContext.ReadyCallbacks.push(callback);
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//Clear the existing timer if there is one.
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if (IgniteRenderingContext.ReadyTimer) {
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clearTimeout(IgniteRenderingContext.ReadyTimer);
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}
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//Set a new timeout, it will only run once all elements are ready because
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//of the way single threaded timers work.
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IgniteRenderingContext.ReadyTimer = setTimeout(() => {
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IgniteRenderingContext.ReadyCallbacks.forEach((ready) => ready.invoke());
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IgniteRenderingContext.ReadyCallbacks = [];
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IgniteRenderingContext.ReadyTimer = null;
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}, 1);
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}
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static get rendering() {
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if (IgniteRenderingContext.RenderCount && IgniteRenderingContext.RenderCount > 0) {
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return true;
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}
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return false;
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}
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}
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window.IgniteRenderingContext = IgniteRenderingContext;
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export {
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IgniteProperty,
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IgniteRenderingContext,
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IgniteCallback
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}; |