[AAE-936] injecting external settings for amount widget (#5389)

* injecting external settings for amount widget

* undo form changes

lib/core/form/components/widgets/amount/amount.widget.spec.ts

@@ -17,7 +17,7 @@
 
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { FormFieldModel } from './../core/form-field.model';
-import { AmountWidgetComponent } from './amount.widget';
+import { AmountWidgetComponent, ADF_AMOUNT_SETTINGS } from './amount.widget';
 import { setupTestBed } from '../../../../testing/setupTestBed';
 import { CoreModule } from '../../../../core.module';
 import { NoopAnimationsModule } from '@angular/platform-browser/animations';
@@ -77,3 +77,38 @@ describe('AmountWidgetComponent', () => {
     });
 
 });
+
+describe('AmountWidgetComponent settings', () => {
+    let widget: AmountWidgetComponent;
+    let fixture: ComponentFixture<AmountWidgetComponent>;
+
+    setupTestBed({
+        imports: [
+            NoopAnimationsModule,
+            CoreModule.forRoot()
+        ],
+        providers: [
+            {
+                provide: ADF_AMOUNT_SETTINGS,
+                useValue: {
+                    showReadonlyPlaceholder: true
+                }
+            }
+        ]
+    });
+
+    beforeEach(() => {
+        fixture = TestBed.createComponent(AmountWidgetComponent);
+
+        widget = fixture.componentInstance;
+    });
+
+    it('should display placeholder via injected settings', () => {
+        const field: any = {
+            readOnly: true,
+            placeholder: 'some placeholder'
+        };
+        widget.field = field;
+        expect(widget.placeholder).toBe('some placeholder');
+    });
+});

lib/core/form/components/widgets/amount/amount.widget.ts

@@ -17,10 +17,16 @@
 
  /* tslint:disable:component-selector  */
 
-import { Component, OnInit, ViewEncapsulation } from '@angular/core';
+import { Component, OnInit, ViewEncapsulation, InjectionToken, Inject, Optional } from '@angular/core';
 import { FormService } from './../../../services/form.service';
 import { baseHost , WidgetComponent } from './../widget.component';
 
+export interface AmountWidgetSettings {
+    showReadonlyPlaceholder: boolean;
+}
+
+export const ADF_AMOUNT_SETTINGS = new InjectionToken<AmountWidgetSettings>('adf-amount-settings');
+
 @Component({
     selector: 'amount-widget',
     templateUrl: './amount.widget.html',
@@ -31,20 +37,32 @@ import { baseHost , WidgetComponent } from './../widget.component';
 export class AmountWidgetComponent extends WidgetComponent implements OnInit {
 
     static DEFAULT_CURRENCY: string = '$';
+    private showPlaceholder = true;
 
     currency: string = AmountWidgetComponent.DEFAULT_CURRENCY;
 
     get placeholder(): string {
-        return !this.field.readOnly ? this.field.placeholder : '';
+        return this.showPlaceholder ? this.field.placeholder : '';
     }
 
-    constructor(public formService: FormService) {
+    constructor(
+        public formService: FormService,
+        @Inject(ADF_AMOUNT_SETTINGS)
+        @Optional()
+        private settings: AmountWidgetSettings
+    ) {
         super(formService);
     }
 
     ngOnInit() {
-        if (this.field && this.field.currency) {
-            this.currency = this.field.currency;
+        if (this.field) {
+            if (this.field.currency) {
+                this.currency = this.field.currency;
+            }
+
+            if (this.field.readOnly) {
+                this.showPlaceholder = this.settings && this.settings.showReadonlyPlaceholder;
+            }
         }
     }