103 lines
2.8 KiB
TypeScript
103 lines
2.8 KiB
TypeScript
|
import {
|
||
|
|
OnChanges,
|
||
|
|
SimpleChanges,
|
||
|
|
Directive,
|
||
|
|
forwardRef,
|
||
|
|
Inject,
|
||
|
|
Optional,
|
||
|
|
Self
|
||
|
|
} from '@angular/core';
|
||
|
|
import {EventEmitter, ObservableWrapper} from '../../facade/async';
|
||
|
|
import {ControlValueAccessor, NG_VALUE_ACCESSOR} from './control_value_accessor';
|
||
|
|
import {NgControl} from './ng_control';
|
||
|
|
import {Control} from '../model';
|
||
|
|
import {NG_VALIDATORS, NG_ASYNC_VALIDATORS} from '../validators';
|
||
|
|
import {
|
||
|
|
setUpControl,
|
||
|
|
isPropertyUpdated,
|
||
|
|
selectValueAccessor,
|
||
|
|
composeValidators,
|
||
|
|
composeAsyncValidators
|
||
|
|
} from './shared';
|
||
|
|
import {ValidatorFn, AsyncValidatorFn} from './validators';
|
||
|
|
|
||
|
|
export const formControlBinding: any =
|
||
|
|
/*@ts2dart_const*/ /* @ts2dart_Provider */ {
|
||
|
|
provide: NgControl,
|
||
|
|
useExisting: forwardRef(() => NgModel)
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Binds a domain model to a form control.
|
||
|
|
*
|
||
|
|
* ### Usage
|
||
|
|
*
|
||
|
|
* `ngModel` binds an existing domain model to a form control. For a
|
||
|
|
* two-way binding, use `[(ngModel)]` to ensure the model updates in
|
||
|
|
* both directions.
|
||
|
|
*
|
||
|
|
* ### Example ([live demo](http://plnkr.co/edit/R3UX5qDaUqFO2VYR0UzH?p=preview))
|
||
|
|
* ```typescript
|
||
|
|
* @Component({
|
||
|
|
* selector: "search-comp",
|
||
|
|
* directives: [FORM_DIRECTIVES],
|
||
|
|
* template: `<input type='text' [(ngModel)]="searchQuery">`
|
||
|
|
* })
|
||
|
|
* class SearchComp {
|
||
|
|
* searchQuery: string;
|
||
|
|
* }
|
||
|
|
* ```
|
||
|
|
*
|
||
|
|
* @experimental
|
||
|
|
*/
|
||
|
|
@Directive({
|
||
|
|
selector: '[ngModel]:not([ngControl]):not([ngFormControl])',
|
||
|
|
providers: [formControlBinding],
|
||
|
|
inputs: ['model: ngModel'],
|
||
|
|
outputs: ['update: ngModelChange'],
|
||
|
|
exportAs: 'ngForm'
|
||
|
|
})
|
||
|
|
export class NgModel extends NgControl implements OnChanges {
|
||
|
|
/** @internal */
|
||
|
|
_control = new Control();
|
||
|
|
/** @internal */
|
||
|
|
_added = false;
|
||
|
|
update = new EventEmitter();
|
||
|
|
model: any;
|
||
|
|
viewModel: any;
|
||
|
|
|
||
|
|
constructor(@Optional() @Self() @Inject(NG_VALIDATORS) private _validators: any[],
|
||
|
|
@Optional() @Self() @Inject(NG_ASYNC_VALIDATORS) private _asyncValidators: any[],
|
||
|
|
@Optional() @Self() @Inject(NG_VALUE_ACCESSOR)
|
||
|
|
valueAccessors: ControlValueAccessor[]) {
|
||
|
|
super();
|
||
|
|
this.valueAccessor = selectValueAccessor(this, valueAccessors);
|
||
|
|
}
|
||
|
|
|
||
|
|
ngOnChanges(changes: SimpleChanges) {
|
||
|
|
if (!this._added) {
|
||
|
|
setUpControl(this._control, this);
|
||
|
|
this._control.updateValueAndValidity({emitEvent: false});
|
||
|
|
this._added = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isPropertyUpdated(changes, this.viewModel)) {
|
||
|
|
this._control.updateValue(this.model);
|
||
|
|
this.viewModel = this.model;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
get control(): Control { return this._control; }
|
||
|
|
|
||
|
|
get path(): string[] { return []; }
|
||
|
|
|
||
|
|
get validator(): ValidatorFn { return composeValidators(this._validators); }
|
||
|
|
|
||
|
|
get asyncValidator(): AsyncValidatorFn { return composeAsyncValidators(this._asyncValidators); }
|
||
|
|
|
||
|
|
viewToModelUpdate(newValue: any): void {
|
||
|
|
this.viewModel = newValue;
|
||
|
|
ObservableWrapper.callEmit(this.update, newValue);
|
||
|
|
}
|
||
|
|
}
|