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property.ts
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property.ts
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/**
* @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 {bindingUpdated} from '../bindings';
import {TNode} from '../interfaces/node';
import {SanitizerFn} from '../interfaces/sanitization';
import {LView, TView} from '../interfaces/view';
import {getLView, getSelectedIndex, getTView, nextBindingIndex} from '../state';
import {elementPropertyInternal, setInputsForProperty, storePropertyBindingMetadata} from './shared';
/**
* Update a property on a selected element.
*
* Operates on the element selected by index via the {@link select} instruction.
*
* If the property name also exists as an input property on one of the element's directives,
* the component property will be set instead of the element property. This check must
* be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled
*
* @param propName Name of property. Because it is going to DOM, this is not subject to
* renaming as part of minification.
* @param value New value to write.
* @param sanitizer An optional function used to sanitize the value.
* @returns This function returns itself so that it may be chained
* (e.g. `property('name', ctx.name)('title', ctx.title)`)
*
* @codeGenApi
*/
export function ɵɵproperty<T>(
propName: string, value: T, sanitizer?: SanitizerFn | null): typeof ɵɵproperty {
const lView = getLView();
const bindingIndex = nextBindingIndex();
if (bindingUpdated(lView, bindingIndex, value)) {
const nodeIndex = getSelectedIndex();
const tView = getTView();
elementPropertyInternal(tView, lView, nodeIndex, propName, value, sanitizer);
ngDevMode && storePropertyBindingMetadata(tView.data, nodeIndex, propName, bindingIndex);
}
return ɵɵproperty;
}
/**
* Given `<div style="..." my-dir>` and `MyDir` with `@Input('style')` we need to write to
* directive input.
*/
export function setDirectiveInputsWhichShadowsStyling(
tView: TView, tNode: TNode, lView: LView, value: any, isClassBased: boolean) {
const inputs = tNode.inputs !;
const property = isClassBased ? 'class' : 'style';
// We support both 'class' and `className` hence the fallback.
setInputsForProperty(tView, lView, inputs[property], property, value);
}