@ngx-formly/core
Version:
Formly is a dynamic (JSON powered) form library for Angular that bring unmatched maintainability to your application's forms.
129 lines • 16.9 kB
JavaScript
import { Component, ChangeDetectionStrategy, Input, EventEmitter, Output, ContentChildren, } from '@angular/core';
import { FormlyFormBuilder } from '../services/formly.builder';
import { clone, hasKey } from '../utils';
import { switchMap, filter, take } from 'rxjs/operators';
import { clearControl } from '../extensions/field-form/utils';
import { FormlyFieldTemplates, FormlyTemplate } from './formly.template';
import * as i0 from "@angular/core";
import * as i1 from "../services/formly.builder";
import * as i2 from "../services/formly.config";
import * as i3 from "./formly.template";
import * as i4 from "./formly.field";
/**
* The `<form-form>` component is the main container of the form,
* which takes care of managing the form state
* and delegates the rendering of each field to `<formly-field>` component.
*/
export class FormlyForm {
constructor(builder, config, ngZone, fieldTemplates) {
this.builder = builder;
this.config = config;
this.ngZone = ngZone;
this.fieldTemplates = fieldTemplates;
/** Event that is emitted when the model value is changed */
this.modelChange = new EventEmitter();
this.field = { type: 'formly-group' };
this._modelChangeValue = {};
this.valueChangesUnsubscribe = () => { };
}
/** The form instance which allow to track model value and validation status. */
set form(form) {
this.field.form = form;
}
get form() {
return this.field.form;
}
/** The model to be represented by the form. */
set model(model) {
if (this.config.extras.immutable && this._modelChangeValue === model) {
return;
}
this.setField({ model });
}
get model() {
return this.field.model;
}
/** The field configurations for building the form. */
set fields(fieldGroup) {
this.setField({ fieldGroup });
}
get fields() {
return this.field.fieldGroup;
}
/** Options for the form. */
set options(options) {
this.setField({ options });
}
get options() {
return this.field.options;
}
set templates(templates) {
this.fieldTemplates.templates = templates;
}
ngDoCheck() {
if (this.config.extras.checkExpressionOn === 'changeDetectionCheck') {
this.checkExpressionChange();
}
}
ngOnChanges(changes) {
if (changes.fields && this.form) {
clearControl(this.form);
}
if (changes.fields || changes.form || (changes.model && this._modelChangeValue !== changes.model.currentValue)) {
this.valueChangesUnsubscribe();
this.builder.build(this.field);
this.valueChangesUnsubscribe = this.valueChanges();
}
}
ngOnDestroy() {
this.valueChangesUnsubscribe();
}
checkExpressionChange() {
this.field.options.checkExpressions?.(this.field);
}
valueChanges() {
this.valueChangesUnsubscribe();
const sub = this.field.options.fieldChanges
.pipe(filter(({ field, type }) => hasKey(field) && type === 'valueChanges'), switchMap(() => this.ngZone.onStable.asObservable().pipe(take(1))))
.subscribe(() => this.ngZone.runGuarded(() => {
// runGuarded is used to keep in sync the expression changes
// https://github.com/ngx-formly/ngx-formly/issues/2095
this.checkExpressionChange();
this.modelChange.emit((this._modelChangeValue = clone(this.model)));
}));
return () => sub.unsubscribe();
}
setField(field) {
if (this.config.extras.immutable) {
this.field = { ...this.field, ...clone(field) };
}
else {
Object.keys(field).forEach((p) => (this.field[p] = field[p]));
}
}
}
FormlyForm.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.3.12", ngImport: i0, type: FormlyForm, deps: [{ token: i1.FormlyFormBuilder }, { token: i2.FormlyConfig }, { token: i0.NgZone }, { token: i3.FormlyFieldTemplates }], target: i0.ɵɵFactoryTarget.Component });
FormlyForm.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "12.0.0", version: "13.3.12", type: FormlyForm, selector: "formly-form", inputs: { form: "form", model: "model", fields: "fields", options: "options" }, outputs: { modelChange: "modelChange" }, providers: [FormlyFormBuilder, FormlyFieldTemplates], queries: [{ propertyName: "templates", predicate: FormlyTemplate }], usesOnChanges: true, ngImport: i0, template: '<formly-field [field]="field"></formly-field>', isInline: true, components: [{ type: i4.FormlyField, selector: "formly-field", inputs: ["field"] }], changeDetection: i0.ChangeDetectionStrategy.OnPush });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.3.12", ngImport: i0, type: FormlyForm, decorators: [{
type: Component,
args: [{
selector: 'formly-form',
template: '<formly-field [field]="field"></formly-field>',
providers: [FormlyFormBuilder, FormlyFieldTemplates],
changeDetection: ChangeDetectionStrategy.OnPush,
}]
}], ctorParameters: function () { return [{ type: i1.FormlyFormBuilder }, { type: i2.FormlyConfig }, { type: i0.NgZone }, { type: i3.FormlyFieldTemplates }]; }, propDecorators: { form: [{
type: Input
}], model: [{
type: Input
}], fields: [{
type: Input
}], options: [{
type: Input
}], modelChange: [{
type: Output
}], templates: [{
type: ContentChildren,
args: [FormlyTemplate]
}] } });
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{\n  Component,\n  ChangeDetectionStrategy,\n  DoCheck,\n  OnChanges,\n  Input,\n  SimpleChanges,\n  EventEmitter,\n  Output,\n  OnDestroy,\n  NgZone,\n  ContentChildren,\n  QueryList,\n} from '@angular/core';\nimport { FormGroup, FormArray } from '@angular/forms';\nimport { FormlyFieldConfig, FormlyFormOptions, FormlyFieldConfigCache } from '../models';\nimport { FormlyFormBuilder } from '../services/formly.builder';\nimport { FormlyConfig } from '../services/formly.config';\nimport { clone, hasKey } from '../utils';\nimport { switchMap, filter, take } from 'rxjs/operators';\nimport { clearControl } from '../extensions/field-form/utils';\nimport { FormlyFieldTemplates, FormlyTemplate } from './formly.template';\n\n/**\n * The `<form-form>` component is the main container of the form,\n * which takes care of managing the form state\n * and delegates the rendering of each field to `<formly-field>` component.\n */\n@Component({\n  selector: 'formly-form',\n  template: '<formly-field [field]=\"field\"></formly-field>',\n  providers: [FormlyFormBuilder, FormlyFieldTemplates],\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class FormlyForm implements DoCheck, OnChanges, OnDestroy {\n  /** The form instance which allow to track model value and validation status. */\n  @Input()\n  set form(form: FormGroup | FormArray) {\n    this.field.form = form;\n  }\n  get form(): FormGroup | FormArray {\n    return this.field.form;\n  }\n\n  /** The model to be represented by the form. */\n  @Input()\n  set model(model: any) {\n    if (this.config.extras.immutable && this._modelChangeValue === model) {\n      return;\n    }\n\n    this.setField({ model });\n  }\n  get model(): any {\n    return this.field.model;\n  }\n\n  /** The field configurations for building the form. */\n  @Input()\n  set fields(fieldGroup: FormlyFieldConfig[]) {\n    this.setField({ fieldGroup });\n  }\n  get fields(): FormlyFieldConfig[] {\n    return this.field.fieldGroup;\n  }\n\n  /** Options for the form. */\n  @Input()\n  set options(options: FormlyFormOptions) {\n    this.setField({ options });\n  }\n  get options(): FormlyFormOptions {\n    return this.field.options;\n  }\n\n  /** Event that is emitted when the model value is changed */\n  @Output() modelChange = new EventEmitter<any>();\n  @ContentChildren(FormlyTemplate) set templates(templates: QueryList<FormlyTemplate>) {\n    this.fieldTemplates.templates = templates;\n  }\n\n  field: FormlyFieldConfigCache = { type: 'formly-group' };\n  private _modelChangeValue: any = {};\n  private valueChangesUnsubscribe = () => {};\n\n  constructor(\n    private builder: FormlyFormBuilder,\n    private config: FormlyConfig,\n    private ngZone: NgZone,\n    private fieldTemplates: FormlyFieldTemplates,\n  ) {}\n\n  ngDoCheck() {\n    if (this.config.extras.checkExpressionOn === 'changeDetectionCheck') {\n      this.checkExpressionChange();\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes.fields && this.form) {\n      clearControl(this.form);\n    }\n\n    if (changes.fields || changes.form || (changes.model && this._modelChangeValue !== changes.model.currentValue)) {\n      this.valueChangesUnsubscribe();\n      this.builder.build(this.field);\n      this.valueChangesUnsubscribe = this.valueChanges();\n    }\n  }\n\n  ngOnDestroy() {\n    this.valueChangesUnsubscribe();\n  }\n\n  private checkExpressionChange() {\n    this.field.options.checkExpressions?.(this.field);\n  }\n\n  private valueChanges() {\n    this.valueChangesUnsubscribe();\n\n    const sub = this.field.options.fieldChanges\n      .pipe(\n        filter(({ field, type }) => hasKey(field) && type === 'valueChanges'),\n        switchMap(() => this.ngZone.onStable.asObservable().pipe(take(1))),\n      )\n      .subscribe(() =>\n        this.ngZone.runGuarded(() => {\n          // runGuarded is used to keep in sync the expression changes\n          // https://github.com/ngx-formly/ngx-formly/issues/2095\n          this.checkExpressionChange();\n          this.modelChange.emit((this._modelChangeValue = clone(this.model)));\n        }),\n      );\n\n    return () => sub.unsubscribe();\n  }\n\n  private setField(field: FormlyFieldConfigCache) {\n    if (this.config.extras.immutable) {\n      this.field = { ...this.field, ...clone(field) };\n    } else {\n      Object.keys(field).forEach((p) => ((this.field as any)[p] = (field as any)[p]));\n    }\n  }\n}\n"]}