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fix(ivy): remove unnecessary parameter of NgOnChangesFeature (#21879)

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PR Close #21879
This commit is contained in:
Chuck Jazdzewski
2018-01-29 15:57:58 -08:00
committed by Alex Rickabaugh
parent 8b14488827
commit 65cf1add97
4 changed files with 50 additions and 52 deletions
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96
packages/core/src/render3/definition.ts
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@ -67,59 +67,57 @@ type OnChangesExpando = OnChanges & {
[key: string]: any;
};
export function NgOnChangesFeature<T>(type: Type<T>): (definition: DirectiveDef<any>) => void {
return function(definition: DirectiveDef<any>): void {
const inputs = definition.inputs;
const proto = type.prototype;
// Place where we will store SimpleChanges if there is a change
Object.defineProperty(proto, PRIVATE_PREFIX, {value: undefined, writable: true});
for (let pubKey in inputs) {
const minKey = inputs[pubKey];
const privateMinKey = PRIVATE_PREFIX + minKey;
// Create a place where the actual value will be stored and make it non-enumerable
Object.defineProperty(proto, privateMinKey, {value: undefined, writable: true});
export function NgOnChangesFeature(definition: DirectiveDef<any>): void {
const inputs = definition.inputs;
const proto = definition.type.prototype;
// Place where we will store SimpleChanges if there is a change
Object.defineProperty(proto, PRIVATE_PREFIX, {value: undefined, writable: true});
for (let pubKey in inputs) {
const minKey = inputs[pubKey];
const privateMinKey = PRIVATE_PREFIX + minKey;
// Create a place where the actual value will be stored and make it non-enumerable
Object.defineProperty(proto, privateMinKey, {value: undefined, writable: true});
const existingDesc = Object.getOwnPropertyDescriptor(proto, minKey);
const existingDesc = Object.getOwnPropertyDescriptor(proto, minKey);
// create a getter and setter for property
Object.defineProperty(proto, minKey, {
get: function(this: OnChangesExpando) {
return (existingDesc && existingDesc.get) ? existingDesc.get.call(this) :
this[privateMinKey];
},
set: function(this: OnChangesExpando, value: any) {
let simpleChanges = this[PRIVATE_PREFIX];
let isFirstChange = simpleChanges === undefined;
if (simpleChanges == null) {
simpleChanges = this[PRIVATE_PREFIX] = {};
}
simpleChanges[pubKey] = new SimpleChange(this[privateMinKey], value, isFirstChange);
(existingDesc && existingDesc.set) ? existingDesc.set.call(this, value) :
this[privateMinKey] = value;
}
});
}
// If an onInit hook is defined, it will need to wrap the ngOnChanges call
// so the call order is changes-init-check in creation mode. In subsequent
// change detection runs, only the check wrapper will be called.
if (definition.onInit != null) {
definition.onInit = onChangesWrapper(definition.onInit);
}
definition.doCheck = onChangesWrapper(definition.doCheck);
function onChangesWrapper(delegateHook: (() => void) | null) {
return function(this: OnChangesExpando) {
// create a getter and setter for property
Object.defineProperty(proto, minKey, {
get: function(this: OnChangesExpando) {
return (existingDesc && existingDesc.get) ? existingDesc.get.call(this) :
this[privateMinKey];
},
set: function(this: OnChangesExpando, value: any) {
let simpleChanges = this[PRIVATE_PREFIX];
if (simpleChanges != null) {
this.ngOnChanges(simpleChanges);
this[PRIVATE_PREFIX] = null;
let isFirstChange = simpleChanges === undefined;
if (simpleChanges == null) {
simpleChanges = this[PRIVATE_PREFIX] = {};
}
delegateHook && delegateHook.apply(this);
};
}
};
simpleChanges[pubKey] = new SimpleChange(this[privateMinKey], value, isFirstChange);
(existingDesc && existingDesc.set) ? existingDesc.set.call(this, value) :
this[privateMinKey] = value;
}
});
}
// If an onInit hook is defined, it will need to wrap the ngOnChanges call
// so the call order is changes-init-check in creation mode. In subsequent
// change detection runs, only the check wrapper will be called.
if (definition.onInit != null) {
definition.onInit = onChangesWrapper(definition.onInit);
}
definition.doCheck = onChangesWrapper(definition.doCheck);
function onChangesWrapper(delegateHook: (() => void) | null) {
return function(this: OnChangesExpando) {
let simpleChanges = this[PRIVATE_PREFIX];
if (simpleChanges != null) {
this.ngOnChanges(simpleChanges);
this[PRIVATE_PREFIX] = null;
}
delegateHook && delegateHook.apply(this);
};
}
}