79 lines
1.5 KiB
JavaScript
79 lines
1.5 KiB
JavaScript
import {ABSTRACT, BaseException, CONST} from 'angular2/src/facade/lang';
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/**
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* Indicates that the result of a {@link Pipe} transformation has changed even though the reference has not changed.
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*
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* The wrapped value will be unwrapped by change detection, and the unwrapped value will be stored.
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*
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* @exportedAs angular2/pipes
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*/
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export class WrappedValue {
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wrapped:any;
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constructor(wrapped:any) {
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this.wrapped = wrapped;
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}
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static wrap(value:any):WrappedValue {
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var w = _wrappedValues[_wrappedIndex++ % 5];
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w.wrapped = value;
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return w;
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}
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}
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var _wrappedValues = [
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new WrappedValue(null),
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new WrappedValue(null),
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new WrappedValue(null),
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new WrappedValue(null),
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new WrappedValue(null)
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];
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var _wrappedIndex = 0;
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/**
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* An interface for extending the list of pipes known to Angular.
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*
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* If you are writing a custom {@link Pipe}, you must extend this interface.
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*
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* #Example
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*
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* ```
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* class DoublePipe extends Pipe {
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* supports(obj) {
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* return true;
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* }
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*
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* transform(value) {
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* return `${value}${value}`;
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* }
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* }
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* ```
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*
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* @exportedAs angular2/pipes
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*/
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export class Pipe {
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supports(obj):boolean {return false;}
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onDestroy() {}
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transform(value:any):any {return null;}
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}
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@ABSTRACT()
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export class PipeFactory {
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@CONST()
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constructor() {
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}
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supports(obs):boolean {
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return _abstract();
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}
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create(cdRef):Pipe {
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return _abstract();
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}
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}
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function _abstract() {
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return new BaseException('This method is abstract');
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}
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