feat(progress-spinner): add injection token for configuring the diameter globally

Adds the `MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS` injection token that can be used to globally configure the diameter (and any other options we decide to add) for all progress spinners.

Fixes #11490.

Author: crisbeto

src/lib/progress-spinner/progress-spinner.spec.ts

@@ -1,7 +1,11 @@
 import {TestBed, async} from '@angular/core/testing';
 import {Component} from '@angular/core';
 import {By} from '@angular/platform-browser';
-import {MatProgressSpinnerModule, MatProgressSpinner} from './index';
+import {
+  MatProgressSpinnerModule,
+  MatProgressSpinner,
+  MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS,
+} from './index';
 
 
 describe('MatProgressSpinner', () => {
@@ -232,6 +236,27 @@ describe('MatProgressSpinner', () => {
     expect(spinner.nativeElement.style.width).toBe('32px');
     expect(spinner.nativeElement.style.height).toBe('32px');
   });
+
+  it('should be able to set a default diameter', () => {
+    TestBed
+      .resetTestingModule()
+      .configureTestingModule({
+        imports: [MatProgressSpinnerModule],
+        declarations: [BasicProgressSpinner],
+        providers: [{
+          provide: MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS,
+          useValue: {diameter: 23}
+        }]
+      })
+      .compileComponents();
+
+    const fixture = TestBed.createComponent(BasicProgressSpinner);
+    fixture.detectChanges();
+
+    const progressElement = fixture.debugElement.query(By.css('mat-progress-spinner'));
+    expect(progressElement.componentInstance.diameter).toBe(23);
+  });
+
 });
 
 

src/lib/progress-spinner/progress-spinner.ts

@@ -14,6 +14,7 @@ import {
   ElementRef,
   ViewEncapsulation,
   Optional,
+  InjectionToken,
 } from '@angular/core';
 import {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';
 import {CanColor, mixinColor} from '@angular/material/core';
@@ -43,6 +44,24 @@ export class MatProgressSpinnerBase {
 }
 export const _MatProgressSpinnerMixinBase = mixinColor(MatProgressSpinnerBase, 'primary');
 
+/** Default `mat-progress-spinner` options that can be overridden. */
+export interface MatProgressSpinnerDefaultOptions {
+  /** Diameter of the spinner. */
+  diameter?: number;
+}
+
+/** Injection token to be used to override the default options for `mat-progress-spinner`. */
+export const MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS =
+    new InjectionToken<MatProgressSpinnerDefaultOptions>('mat-progress-spinner-default-options', {
+      providedIn: 'root',
+      factory: MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS_FACTORY,
+    });
+
+/** @docs-private */
+export function MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS_FACTORY(): MatProgressSpinnerDefaultOptions {
+  return {diameter: BASE_SIZE};
+}
+
 // .0001 percentage difference is necessary in order to avoid unwanted animation frames
 // for example because the animation duration is 4 seconds, .1% accounts to 4ms
 // which are enough to see the flicker described in
@@ -120,7 +139,8 @@ export class MatProgressSpinner extends _MatProgressSpinnerMixinBase implements
       this._attachStyleNode();
     }
   }
-  private _diameter = BASE_SIZE;
+  private _diameter = this._defaults && this._defaults.diameter ?
+      this._defaults.diameter : BASE_SIZE;
 
   /** Stroke width of the progress spinner. */
   @Input()
@@ -131,7 +151,6 @@ export class MatProgressSpinner extends _MatProgressSpinnerMixinBase implements
     this._strokeWidth = coerceNumberProperty(value);
   }
 
-
   /** Mode of the progress circle */
   @Input() mode: ProgressSpinnerMode = 'determinate';
 
@@ -147,7 +166,10 @@ export class MatProgressSpinner extends _MatProgressSpinnerMixinBase implements
   constructor(public _elementRef: ElementRef,
               platform: Platform,
               @Optional() @Inject(DOCUMENT) private _document: any,
-              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {
+              // @deletion-target 7.0.0 _animationMode and _defaults parameters to be made required.
+              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string,
+              @Inject(MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS)
+                  private _defaults?: MatProgressSpinnerDefaultOptions) {
 
     super(_elementRef);
     this._fallbackAnimation = platform.EDGE || platform.TRIDENT;
@@ -249,8 +271,11 @@ export class MatProgressSpinner extends _MatProgressSpinnerMixinBase implements
 export class MatSpinner extends MatProgressSpinner {
   constructor(elementRef: ElementRef, platform: Platform,
               @Optional() @Inject(DOCUMENT) document: any,
-              @Optional() @Inject(ANIMATION_MODULE_TYPE) _animationMode?: string) {
-    super(elementRef, platform, document, _animationMode);
+              // @deletion-targets 7.0.0 animationMode and defaults parameters to be made required.
+              @Optional() @Inject(ANIMATION_MODULE_TYPE) animationMode?: string,
+              @Inject(MAT_PROGRESS_SPINNER_DEFAULT_OPTIONS)
+                  defaults?: MatProgressSpinnerDefaultOptions) {
+    super(elementRef, platform, document, animationMode, defaults);
     this.mode = 'indeterminate';
   }
 }