@angular/core
Version:
Angular - the core framework
126 lines • 13.4 kB
JavaScript
/**
* @fileoverview added by tsickle
* Generated from: packages/core/src/render3/bindings.ts
* @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
/**
* @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, assertNotSame } from '../util/assert';
import { getExpressionChangedErrorDetails, throwErrorIfNoChangesMode } from './errors';
import { getCheckNoChangesMode } from './state';
import { NO_CHANGE } from './tokens';
// TODO(misko): consider inlining
/**
* Updates binding and returns the value.
* @param {?} lView
* @param {?} bindingIndex
* @param {?} value
* @return {?}
*/
export function updateBinding(lView, bindingIndex, value) {
return lView[bindingIndex] = value;
}
/**
* Gets the current binding value.
* @param {?} lView
* @param {?} bindingIndex
* @return {?}
*/
export function getBinding(lView, bindingIndex) {
ngDevMode && assertDataInRange(lView, bindingIndex);
ngDevMode &&
assertNotSame(lView[bindingIndex], NO_CHANGE, 'Stored value should never be NO_CHANGE.');
return lView[bindingIndex];
}
/**
* Updates binding if changed, then returns whether it was updated.
*
* This function also checks the `CheckNoChangesMode` and throws if changes are made.
* Some changes (Objects/iterables) during `CheckNoChangesMode` are exempt to comply with VE
* behavior.
*
* @param {?} lView current `LView`
* @param {?} bindingIndex The binding in the `LView` to check
* @param {?} value New value to check against `lView[bindingIndex]`
* @return {?} `true` if the bindings has changed. (Throws if binding has changed during
* `CheckNoChangesMode`)
*/
export function bindingUpdated(lView, bindingIndex, value) {
ngDevMode && assertNotSame(value, NO_CHANGE, 'Incoming value should never be NO_CHANGE.');
ngDevMode &&
assertLessThan(bindingIndex, lView.length, `Slot should have been initialized to NO_CHANGE`);
/** @type {?} */
const oldValue = lView[bindingIndex];
if (Object.is(oldValue, value)) {
return false;
}
else {
if (ngDevMode && getCheckNoChangesMode()) {
// View engine didn't report undefined values as changed on the first checkNoChanges pass
// (before the change detection was run).
/** @type {?} */
const oldValueToCompare = oldValue !== NO_CHANGE ? oldValue : undefined;
if (!devModeEqual(oldValueToCompare, value)) {
/** @type {?} */
const details = getExpressionChangedErrorDetails(lView, bindingIndex, oldValueToCompare, value);
throwErrorIfNoChangesMode(oldValue === NO_CHANGE, details.oldValue, details.newValue, details.propName);
}
// There was a change, but the `devModeEqual` decided that the change is exempt from an error.
// For this reason we exit as if no change. The early exit is needed to prevent the changed
// value to be written into `LView` (If we would write the new value that we would not see it
// as change on next CD.)
return false;
}
lView[bindingIndex] = value;
return true;
}
}
/**
* Updates 2 bindings if changed, then returns whether either was updated.
* @param {?} lView
* @param {?} bindingIndex
* @param {?} exp1
* @param {?} exp2
* @return {?}
*/
export function bindingUpdated2(lView, bindingIndex, exp1, exp2) {
/** @type {?} */
const different = bindingUpdated(lView, bindingIndex, exp1);
return bindingUpdated(lView, bindingIndex + 1, exp2) || different;
}
/**
* Updates 3 bindings if changed, then returns whether any was updated.
* @param {?} lView
* @param {?} bindingIndex
* @param {?} exp1
* @param {?} exp2
* @param {?} exp3
* @return {?}
*/
export function bindingUpdated3(lView, bindingIndex, exp1, exp2, exp3) {
/** @type {?} */
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.
* @param {?} lView
* @param {?} bindingIndex
* @param {?} exp1
* @param {?} exp2
* @param {?} exp3
* @param {?} exp4
* @return {?}
*/
export function bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4) {
/** @type {?} */
const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);
return bindingUpdated2(lView, bindingIndex + 2, exp3, exp4) || different;
}
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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {devModeEqual} from '../change_detection/change_detection_util';\nimport {assertDataInRange, assertLessThan, assertNotSame} from '../util/assert';\n\nimport {getExpressionChangedErrorDetails, throwErrorIfNoChangesMode} from './errors';\nimport {LView} from './interfaces/view';\nimport {getCheckNoChangesMode} from './state';\nimport {NO_CHANGE} from './tokens';\n\n\n// TODO(misko): consider inlining\n/** Updates binding and returns the value. */\nexport function updateBinding(lView: LView, bindingIndex: number, value: any): any {\n  return lView[bindingIndex] = value;\n}\n\n\n/** Gets the current binding value. */\nexport function getBinding(lView: LView, bindingIndex: number): any {\n  ngDevMode && assertDataInRange(lView, bindingIndex);\n  ngDevMode &&\n      assertNotSame(lView[bindingIndex], NO_CHANGE, 'Stored value should never be NO_CHANGE.');\n  return lView[bindingIndex];\n}\n\n/**\n * Updates binding if changed, then returns whether it was updated.\n *\n * This function also checks the `CheckNoChangesMode` and throws if changes are made.\n * Some changes (Objects/iterables) during `CheckNoChangesMode` are exempt to comply with VE\n * behavior.\n *\n * @param lView current `LView`\n * @param bindingIndex The binding in the `LView` to check\n * @param value New value to check against `lView[bindingIndex]`\n * @returns `true` if the bindings has changed. (Throws if binding has changed during\n *          `CheckNoChangesMode`)\n */\nexport function bindingUpdated(lView: LView, bindingIndex: number, value: any): boolean {\n  ngDevMode && assertNotSame(value, NO_CHANGE, 'Incoming value should never be NO_CHANGE.');\n  ngDevMode &&\n      assertLessThan(bindingIndex, lView.length, `Slot should have been initialized to NO_CHANGE`);\n  const oldValue = lView[bindingIndex];\n\n  if (Object.is(oldValue, value)) {\n    return false;\n  } else {\n    if (ngDevMode && getCheckNoChangesMode()) {\n      // View engine didn't report undefined values as changed on the first checkNoChanges pass\n      // (before the change detection was run).\n      const oldValueToCompare = oldValue !== NO_CHANGE ? oldValue : undefined;\n      if (!devModeEqual(oldValueToCompare, value)) {\n        const details =\n            getExpressionChangedErrorDetails(lView, bindingIndex, oldValueToCompare, value);\n        throwErrorIfNoChangesMode(\n            oldValue === NO_CHANGE, details.oldValue, details.newValue, details.propName);\n      }\n      // There was a change, but the `devModeEqual` decided that the change is exempt from an error.\n      // For this reason we exit as if no change. The early exit is needed to prevent the changed\n      // value to be written into `LView` (If we would write the new value that we would not see it\n      // as change on next CD.)\n      return false;\n    }\n    lView[bindingIndex] = value;\n    return true;\n  }\n}\n\n/** Updates 2 bindings if changed, then returns whether either was updated. */\nexport function bindingUpdated2(lView: LView, bindingIndex: number, exp1: any, exp2: any): boolean {\n  const different = bindingUpdated(lView, bindingIndex, exp1);\n  return bindingUpdated(lView, bindingIndex + 1, exp2) || different;\n}\n\n/** Updates 3 bindings if changed, then returns whether any was updated. */\nexport function bindingUpdated3(\n    lView: LView, bindingIndex: number, exp1: any, exp2: any, exp3: any): boolean {\n  const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);\n  return bindingUpdated(lView, bindingIndex + 2, exp3) || different;\n}\n\n/** Updates 4 bindings if changed, then returns whether any was updated. */\nexport function bindingUpdated4(\n    lView: LView, bindingIndex: number, exp1: any, exp2: any, exp3: any, exp4: any): boolean {\n  const different = bindingUpdated2(lView, bindingIndex, exp1, exp2);\n  return bindingUpdated2(lView, bindingIndex + 2, exp3, exp4) || different;\n}\n"]}