276 lines
8.4 KiB
TypeScript
276 lines
8.4 KiB
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {assertEqual} from './assert';
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import {NO_CHANGE, bind, getTView} from './instructions';
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/**
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* Updates an expression in an object literal if the expression has changed.
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* Used in objectLiteral instructions.
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*
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* @param obj Object to update
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* @param key Key to set in object
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* @param exp Expression to set at key
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* @returns Whether or not there has been a change
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*/
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function updateBinding(obj: any, key: string | number, exp: any): boolean {
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if (bind(exp) !== NO_CHANGE) {
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obj[key] = exp;
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return true;
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}
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return false;
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}
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/** Updates two expressions in an object literal if they have changed. */
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function updateBinding2(obj: any, key1: number, exp1: any, key2: number, exp2: any): boolean {
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let different = updateBinding(obj, key1, exp1);
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return updateBinding(obj, key2, exp2) || different;
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}
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/** Updates four expressions in an object literal if they have changed. */
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function updateBinding4(
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obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number, exp3: any,
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key4: number, exp4: any): boolean {
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let different = updateBinding2(obj, key1, exp1, key2, exp2);
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return updateBinding2(obj, key3, exp3, key4, exp4) || different;
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}
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/**
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* Gets a blueprint of an object or array if one has already been saved, or copies the
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* object and saves it for the next change detection run if it hasn't.
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*/
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function getMutableBlueprint(index: number, obj: any): any {
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const tView = getTView();
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const objectLiterals = tView.objectLiterals;
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if (objectLiterals && index < objectLiterals.length) {
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return objectLiterals[index];
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} else {
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ngDevMode && objectLiterals && assertEqual(index, objectLiterals.length, 'index');
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return (objectLiterals || (tView.objectLiterals = []))[index] = copyObject(obj);
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}
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}
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/** Copies an object or array */
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function copyObject(obj: any): any {
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return Array.isArray(obj) ? obj.slice() : {...obj};
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}
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/**
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* Updates the expression in the given object if it has changed and returns a copy of the object.
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* Or if the expression hasn't changed, returns NO_CHANGE.
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*
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* @param objIndex Index of object blueprint in objectLiterals
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* @param obj Object to update
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* @param key Key to set in object
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* @param exp Expression to set at key
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral1(objIndex: number, obj: any, key: string | number, exp: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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if (bind(exp) === NO_CHANGE) {
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return NO_CHANGE;
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} else {
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obj[key] = exp;
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// Must copy to change identity when binding changes
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return copyObject(obj);
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}
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @returns A copy of the array or NO_CHANGE
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*/
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export function objectLiteral2(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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return updateBinding2(obj, key1, exp1, key2, exp2) ? copyObject(obj) : NO_CHANGE;
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @param key3
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* @param exp3
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral3(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number,
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exp3: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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let different = updateBinding2(obj, key1, exp1, key2, exp2);
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return updateBinding(obj, key3, exp3) || different ? copyObject(obj) : NO_CHANGE;
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @param key3
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* @param exp3
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* @param key4
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* @param exp4
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral4(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number,
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exp3: any, key4: number, exp4: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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return updateBinding4(obj, key1, exp1, key2, exp2, key3, exp3, key4, exp4) ? copyObject(obj) :
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NO_CHANGE;
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @param key3
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* @param exp3
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* @param key4
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* @param exp4
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* @param key5
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* @param exp5
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral5(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number,
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exp3: any, key4: number, exp4: any, key5: number, exp5: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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let different = updateBinding4(obj, key1, exp1, key2, exp2, key3, exp3, key4, exp4);
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return updateBinding(obj, key5, exp5) || different ? copyObject(obj) : NO_CHANGE;
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @param key3
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* @param exp3
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* @param key4
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* @param exp4
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* @param key5
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* @param exp5
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* @param key6
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* @param exp6
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral6(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number,
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exp3: any, key4: number, exp4: any, key5: number, exp5: any, key6: number, exp6: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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let different = updateBinding4(obj, key1, exp1, key2, exp2, key3, exp3, key4, exp4);
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return updateBinding2(obj, key5, exp5, key6, exp6) || different ? copyObject(obj) : NO_CHANGE;
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @param key3
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* @param exp3
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* @param key4
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* @param exp4
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* @param key5
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* @param exp5
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* @param key6
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* @param exp6
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* @param key7
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* @param exp7
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral7(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number,
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exp3: any, key4: number, exp4: any, key5: number, exp5: any, key6: number, exp6: any,
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key7: number, exp7: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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let different = updateBinding4(obj, key1, exp1, key2, exp2, key3, exp3, key4, exp4);
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different = updateBinding2(obj, key5, exp5, key6, exp6) || different;
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return updateBinding(obj, key7, exp7) || different ? copyObject(obj) : NO_CHANGE;
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}
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/**
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* Updates the expressions in the given object if they have changed and returns a copy of the
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* object.
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* Or if no expressions have changed, returns NO_CHANGE.
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*
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* @param objIndex
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* @param obj
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* @param key1
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* @param exp1
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* @param key2
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* @param exp2
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* @param key3
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* @param exp3
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* @param key4
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* @param exp4
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* @param key5
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* @param exp5
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* @param key6
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* @param exp6
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* @param key7
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* @param exp7
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* @param key8
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* @param exp8
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* @returns A copy of the object or NO_CHANGE
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*/
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export function objectLiteral8(
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objIndex: number, obj: any, key1: number, exp1: any, key2: number, exp2: any, key3: number,
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exp3: any, key4: number, exp4: any, key5: number, exp5: any, key6: number, exp6: any,
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key7: number, exp7: any, key8: number, exp8: any): any {
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obj = getMutableBlueprint(objIndex, obj);
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let different = updateBinding4(obj, key1, exp1, key2, exp2, key3, exp3, key4, exp4);
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return updateBinding4(obj, key5, exp5, key6, exp6, key7, exp7, key8, exp8) || different ?
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copyObject(obj) :
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NO_CHANGE;
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}
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