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refactor(common): cleanup directives

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This commit is contained in:
Victor Berchet
2016-09-08 19:25:25 -07:00
parent 53f0c2206d
commit c649a5c5ab
6 changed files with 57 additions and 67 deletions
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21
modules/@angular/common/src/directives/ng_if.ts
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@ -8,10 +8,6 @@
import {Directive, Input, TemplateRef, ViewContainerRef} from '@angular/core';
import {isBlank} from '../facade/lang';
/**
* Removes or recreates a portion of the DOM tree based on an {expression}.
*
@ -38,18 +34,17 @@ import {isBlank} from '../facade/lang';
*/
@Directive({selector: '[ngIf]'})
export class NgIf {
private _prevCondition: boolean = null;
private _hasView: boolean = false;
constructor(private _viewContainer: ViewContainerRef, private _templateRef: TemplateRef<Object>) {
}
constructor(private _viewContainer: ViewContainerRef, private _template: TemplateRef<Object>) {}
@Input()
set ngIf(newCondition: any) {
if (newCondition && (isBlank(this._prevCondition) || !this._prevCondition)) {
this._prevCondition = true;
this._viewContainer.createEmbeddedView(this._templateRef);
} else if (!newCondition && (isBlank(this._prevCondition) || this._prevCondition)) {
this._prevCondition = false;
set ngIf(condition: any) {
if (condition && !this._hasView) {
this._hasView = true;
this._viewContainer.createEmbeddedView(this._template);
} else if (!condition && this._hasView) {
this._hasView = false;
this._viewContainer.clear();
}
}