angular2
Version:
Angular 2 - a web framework for modern web apps
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JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
return function (target, key) { decorator(target, key, paramIndex); }
};
import { CONST_EXPR } from 'angular2/src/facade/lang';
import { StringMapWrapper } from 'angular2/src/facade/collection';
import { EventEmitter, ObservableWrapper } from 'angular2/src/facade/async';
import { Directive, forwardRef, Provider, Inject, Optional, Self } from 'angular2/core';
import { NgControl } from './ng_control';
import { NG_VALIDATORS, NG_ASYNC_VALIDATORS } from '../validators';
import { NG_VALUE_ACCESSOR } from './control_value_accessor';
import { setUpControl, composeValidators, composeAsyncValidators, isPropertyUpdated, selectValueAccessor } from './shared';
const formControlBinding = CONST_EXPR(new Provider(NgControl, { useExisting: forwardRef(() => NgFormControl) }));
/**
* Binds an existing {@link Control} to a DOM element.
*
* ### Example ([live demo](http://plnkr.co/edit/jcQlZ2tTh22BZZ2ucNAT?p=preview))
*
* In this example, we bind the control to an input element. When the value of the input element
* changes, the value of the control will reflect that change. Likewise, if the value of the
* control changes, the input element reflects that change.
*
* ```typescript
* @Component({
* selector: 'my-app',
* template: `
* <div>
* <h2>NgFormControl Example</h2>
* <form>
* <p>Element with existing control: <input type="text"
* [ngFormControl]="loginControl"></p>
* <p>Value of existing control: {{loginControl.value}}</p>
* </form>
* </div>
* `,
* directives: [CORE_DIRECTIVES, FORM_DIRECTIVES]
* })
* export class App {
* loginControl: Control = new Control('');
* }
* ```
*
* ###ngModel
*
* We can also use `ngModel` to bind a domain model to the form.
*
* ### Example ([live demo](http://plnkr.co/edit/yHMLuHO7DNgT8XvtjTDH?p=preview))
*
* ```typescript
* @Component({
* selector: "login-comp",
* directives: [FORM_DIRECTIVES],
* template: "<input type='text' [ngFormControl]='loginControl' [(ngModel)]='login'>"
* })
* class LoginComp {
* loginControl: Control = new Control('');
* login:string;
* }
* ```
*/
export let NgFormControl = class extends NgControl {
constructor(_validators, _asyncValidators, valueAccessors) {
super();
this._validators = _validators;
this._asyncValidators = _asyncValidators;
this.update = new EventEmitter();
this.valueAccessor = selectValueAccessor(this, valueAccessors);
}
ngOnChanges(changes) {
if (this._isControlChanged(changes)) {
setUpControl(this.form, this);
this.form.updateValueAndValidity({ emitEvent: false });
}
if (isPropertyUpdated(changes, this.viewModel)) {
this.form.updateValue(this.model);
this.viewModel = this.model;
}
}
get path() { return []; }
get validator() { return composeValidators(this._validators); }
get asyncValidator() { return composeAsyncValidators(this._asyncValidators); }
get control() { return this.form; }
viewToModelUpdate(newValue) {
this.viewModel = newValue;
ObservableWrapper.callEmit(this.update, newValue);
}
_isControlChanged(changes) {
return StringMapWrapper.contains(changes, "form");
}
};
NgFormControl = __decorate([
Directive({
selector: '[ngFormControl]',
bindings: [formControlBinding],
inputs: ['form: ngFormControl', 'model: ngModel'],
outputs: ['update: ngModelChange'],
exportAs: 'ngForm'
}),
__param(0, Optional()),
__param(0, Self()),
__param(0, Inject(NG_VALIDATORS)),
__param(1, Optional()),
__param(1, Self()),
__param(1, Inject(NG_ASYNC_VALIDATORS)),
__param(2, Optional()),
__param(2, Self()),
__param(2, Inject(NG_VALUE_ACCESSOR)),
__metadata('design:paramtypes', [Array, Array, Array])
], NgFormControl);
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When the value of the input element\n * changes, the value of the control will reflect that change. Likewise, if the value of the\n * control changes, the input element reflects that change.\n *\n *  ```typescript\n * @Component({\n *   selector: 'my-app',\n *   template: `\n *     <div>\n *       <h2>NgFormControl Example</h2>\n *       <form>\n *         <p>Element with existing control: <input type=\"text\"\n * [ngFormControl]=\"loginControl\"></p>\n *         <p>Value of existing control: {{loginControl.value}}</p>\n *       </form>\n *     </div>\n *   `,\n *   directives: [CORE_DIRECTIVES, FORM_DIRECTIVES]\n * })\n * export class App {\n *   loginControl: Control = new Control('');\n * }\n *  ```\n *\n * ###ngModel\n *\n * We can also use `ngModel` to bind a domain model to the form.\n *\n * ### Example ([live demo](http://plnkr.co/edit/yHMLuHO7DNgT8XvtjTDH?p=preview))\n *\n *  ```typescript\n * @Component({\n *      selector: \"login-comp\",\n *      directives: [FORM_DIRECTIVES],\n *      template: \"<input type='text' [ngFormControl]='loginControl' [(ngModel)]='login'>\"\n *      })\n * class LoginComp {\n *  loginControl: Control = new Control('');\n *  login:string;\n * }\n *  ```\n */\n@Directive({\n  selector: '[ngFormControl]',\n  bindings: [formControlBinding],\n  inputs: ['form: ngFormControl', 'model: ngModel'],\n  outputs: ['update: ngModelChange'],\n  exportAs: 'ngForm'\n})\nexport class NgFormControl extends NgControl implements OnChanges {\n  form: Control;\n  update = new EventEmitter();\n  model: any;\n  viewModel: any;\n\n  constructor(@Optional() @Self() @Inject(NG_VALIDATORS) private _validators:\n                  /* Array<Validator|Function> */ any[],\n              @Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) private _asyncValidators:\n                  /* Array<Validator|Function> */ any[],\n              @Optional() @Self() @Inject(NG_VALUE_ACCESSOR)\n              valueAccessors: ControlValueAccessor[]) {\n    super();\n    this.valueAccessor = selectValueAccessor(this, valueAccessors);\n  }\n\n  ngOnChanges(changes: {[key: string]: SimpleChange}): void {\n    if (this._isControlChanged(changes)) {\n      setUpControl(this.form, this);\n      this.form.updateValueAndValidity({emitEvent: false});\n    }\n    if (isPropertyUpdated(changes, this.viewModel)) {\n      this.form.updateValue(this.model);\n      this.viewModel = this.model;\n    }\n  }\n\n  get path(): string[] { return []; }\n\n  get validator(): Function { return composeValidators(this._validators); }\n\n  get asyncValidator(): Function { return composeAsyncValidators(this._asyncValidators); }\n\n  get control(): Control { return this.form; }\n\n  viewToModelUpdate(newValue: any): void {\n    this.viewModel = newValue;\n    ObservableWrapper.callEmit(this.update, newValue);\n  }\n\n  private _isControlChanged(changes: {[key: string]: any}): boolean {\n    return StringMapWrapper.contains(changes, \"form\");\n  }\n}\n"]}