99886bd159
This commit unifies handling of the "check no changes" mode between ngIvy and the view engine. More specifically: - check no changes can be invoked before change detection in ivy; - `undefined` values are considered equal `NO_CHANGES` for the "check no changes" mode purposes. Chanes in this commit enables several tests that were previously running only in ivy or only in the view engine. PR Close #28366
76 lines
3.0 KiB
TypeScript
76 lines
3.0 KiB
TypeScript
/**
|
|
* @license
|
|
* Copyright Google Inc. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by an MIT-style license that can be
|
|
* found in the LICENSE file at https://angular.io/license
|
|
*/
|
|
|
|
import {devModeEqual} from '../change_detection/change_detection_util';
|
|
import {assertDataInRange, assertLessThan, assertNotEqual} from '../util/assert';
|
|
import {throwErrorIfNoChangesMode} from './errors';
|
|
import {LView} from './interfaces/view';
|
|
import {getCheckNoChangesMode} from './state';
|
|
import {NO_CHANGE} from './tokens';
|
|
import {isDifferent} from './util';
|
|
|
|
|
|
|
|
// TODO(misko): consider inlining
|
|
/** Updates binding and returns the value. */
|
|
export function updateBinding(lView: LView, bindingIndex: number, value: any): any {
|
|
return lView[bindingIndex] = value;
|
|
}
|
|
|
|
|
|
/** Gets the current binding value. */
|
|
export function getBinding(lView: LView, bindingIndex: number): any {
|
|
ngDevMode && assertDataInRange(lView, lView[bindingIndex]);
|
|
ngDevMode &&
|
|
assertNotEqual(lView[bindingIndex], NO_CHANGE, 'Stored value should never be NO_CHANGE.');
|
|
return lView[bindingIndex];
|
|
}
|
|
|
|
/** Updates binding if changed, then returns whether it was updated. */
|
|
export function bindingUpdated(lView: LView, bindingIndex: number, value: any): boolean {
|
|
ngDevMode && assertNotEqual(value, NO_CHANGE, 'Incoming value should never be NO_CHANGE.');
|
|
ngDevMode &&
|
|
assertLessThan(bindingIndex, lView.length, `Slot should have been initialized to NO_CHANGE`);
|
|
|
|
const oldValue = lView[bindingIndex];
|
|
if (isDifferent(oldValue, value)) {
|
|
if (ngDevMode && getCheckNoChangesMode()) {
|
|
// View engine didn't report undefined values as changed on the first checkNoChanges pass
|
|
// (before the change detection was run).
|
|
const oldValueToCompare = oldValue !== NO_CHANGE ? oldValue : undefined;
|
|
if (!devModeEqual(oldValueToCompare, value)) {
|
|
throwErrorIfNoChangesMode(oldValue === NO_CHANGE, oldValueToCompare, value);
|
|
}
|
|
}
|
|
lView[bindingIndex] = value;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/** Updates 2 bindings if changed, then returns whether either was updated. */
|
|
export function bindingUpdated2(lView: LView, bindingIndex: number, exp1: any, exp2: any): boolean {
|
|
const different = bindingUpdated(lView, bindingIndex, exp1);
|
|
return bindingUpdated(lView, bindingIndex + 1, exp2) || different;
|
|
}
|
|
|
|
/** Updates 3 bindings if changed, then returns whether any was updated. */
|
|
export function bindingUpdated3(
|
|
lView: LView, bindingIndex: number, exp1: any, exp2: any, exp3: any): boolean {
|
|
const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);
|
|
return bindingUpdated(lView, bindingIndex + 2, exp3) || different;
|
|
}
|
|
|
|
/** Updates 4 bindings if changed, then returns whether any was updated. */
|
|
export function bindingUpdated4(
|
|
lView: LView, bindingIndex: number, exp1: any, exp2: any, exp3: any, exp4: any): boolean {
|
|
const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);
|
|
return bindingUpdated2(lView, bindingIndex + 2, exp3, exp4) || different;
|
|
}
|