angular2
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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);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
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, isBlank } from 'angular2/src/facade/lang';
import { ListWrapper, StringMapWrapper } from 'angular2/src/facade/collection';
import { BaseException } from 'angular2/src/facade/exceptions';
import { ObservableWrapper, EventEmitter } from 'angular2/src/facade/async';
import { Directive, forwardRef, Provider, Inject, Optional, Self } from 'angular2/core';
import { ControlContainer } from './control_container';
import { setUpControl, setUpControlGroup, composeValidators, composeAsyncValidators } from './shared';
import { Validators, NG_VALIDATORS, NG_ASYNC_VALIDATORS } from '../validators';
const formDirectiveProvider = CONST_EXPR(new Provider(ControlContainer, { useExisting: forwardRef(() => NgFormModel) }));
/**
* Binds an existing control group to a DOM element.
*
* ### Example ([live demo](http://plnkr.co/edit/jqrVirudY8anJxTMUjTP?p=preview))
*
* In this example, we bind the control group to the form element, and we bind the login and
* password controls to the login and password elements.
*
* ```typescript
* @Component({
* selector: 'my-app',
* template: `
* <div>
* <h2>NgFormModel Example</h2>
* <form [ngFormModel]="loginForm">
* <p>Login: <input type="text" ngControl="login"></p>
* <p>Password: <input type="password" ngControl="password"></p>
* </form>
* <p>Value:</p>
* <pre>{{value}}</pre>
* </div>
* `,
* directives: [FORM_DIRECTIVES]
* })
* export class App {
* loginForm: ControlGroup;
*
* constructor() {
* this.loginForm = new ControlGroup({
* login: new Control(""),
* password: new Control("")
* });
* }
*
* get value(): string {
* return JSON.stringify(this.loginForm.value, null, 2);
* }
* }
* ```
*
* We can also use ngModel to bind a domain model to the form.
*
* ```typescript
* @Component({
* selector: "login-comp",
* directives: [FORM_DIRECTIVES],
* template: `
* <form [ngFormModel]='loginForm'>
* Login <input type='text' ngControl='login' [(ngModel)]='credentials.login'>
* Password <input type='password' ngControl='password'
* [(ngModel)]='credentials.password'>
* <button (click)="onLogin()">Login</button>
* </form>`
* })
* class LoginComp {
* credentials: {login: string, password: string};
* loginForm: ControlGroup;
*
* constructor() {
* this.loginForm = new ControlGroup({
* login: new Control(""),
* password: new Control("")
* });
* }
*
* onLogin(): void {
* // this.credentials.login === 'some login'
* // this.credentials.password === 'some password'
* }
* }
* ```
*/
export let NgFormModel = class NgFormModel extends ControlContainer {
constructor(_validators, _asyncValidators) {
super();
this._validators = _validators;
this._asyncValidators = _asyncValidators;
this.form = null;
this.directives = [];
this.ngSubmit = new EventEmitter();
}
ngOnChanges(changes) {
this._checkFormPresent();
if (StringMapWrapper.contains(changes, "form")) {
var sync = composeValidators(this._validators);
this.form.validator = Validators.compose([this.form.validator, sync]);
var async = composeAsyncValidators(this._asyncValidators);
this.form.asyncValidator = Validators.composeAsync([this.form.asyncValidator, async]);
this.form.updateValueAndValidity({ onlySelf: true, emitEvent: false });
}
this._updateDomValue();
}
get formDirective() { return this; }
get control() { return this.form; }
get path() { return []; }
addControl(dir) {
var ctrl = this.form.find(dir.path);
setUpControl(ctrl, dir);
ctrl.updateValueAndValidity({ emitEvent: false });
this.directives.push(dir);
}
getControl(dir) { return this.form.find(dir.path); }
removeControl(dir) { ListWrapper.remove(this.directives, dir); }
addControlGroup(dir) {
var ctrl = this.form.find(dir.path);
setUpControlGroup(ctrl, dir);
ctrl.updateValueAndValidity({ emitEvent: false });
}
removeControlGroup(dir) { }
getControlGroup(dir) {
return this.form.find(dir.path);
}
updateModel(dir, value) {
var ctrl = this.form.find(dir.path);
ctrl.updateValue(value);
}
onSubmit() {
ObservableWrapper.callEmit(this.ngSubmit, null);
return false;
}
/** @internal */
_updateDomValue() {
this.directives.forEach(dir => {
var ctrl = this.form.find(dir.path);
dir.valueAccessor.writeValue(ctrl.value);
});
}
_checkFormPresent() {
if (isBlank(this.form)) {
throw new BaseException(`ngFormModel expects a form. Please pass one in. Example: <form [ngFormModel]="myCoolForm">`);
}
}
};
NgFormModel = __decorate([
Directive({
selector: '[ngFormModel]',
bindings: [formDirectiveProvider],
inputs: ['form: ngFormModel'],
host: { '(submit)': 'onSubmit()' },
outputs: ['ngSubmit'],
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)),
__metadata('design:paramtypes', [Array, Array])
], NgFormModel);