feat(ripple): support animation duration overwrites

* Adds a new option to the ripples that allows developers to have a better control of the animation (all ripples, or even individual ripples).
* Deprecates the `matRippleSpeedFactor` in favor of the `matRippleAnimation` binding that accepts a `RippleAnimationConfig`. The configuration is more explicit, clean and not confusing as the `speedFactor`.
* To provide a more user-friendly `launch()` method API, the passed ripple config will extend the default ripple config from the `MatRipple` instance (removes unnecessary bloat; requested in #4179 (comment))
* Disables ripples for most of the demo buttons in the ripple demo (allows better debugging; when pressing the buttons)

src/demo-app/ripple/ripple-demo.html

@@ -35,9 +35,10 @@
     </mat-form-field>
   </section>
   <section>
-    <button mat-raised-button (click)="launchRipple()">Launch Ripple</button>
-    <button mat-raised-button (click)="launchRipple(true)">Launch Ripple (Persistent)</button>
-    <button mat-raised-button (click)="fadeOutAll()">Fade Out All</button>
+    <button mat-raised-button (click)="launchRipple()" disableRipple>Launch Ripple</button>
+    <button mat-raised-button (click)="launchRipple(true)" disableRipple>Launch Ripple (Persistent)</button>
+    <button mat-raised-button (click)="launchRipple(true, true)" disableRipple>Launch Ripple (No Animation)</button>
+    <button mat-raised-button (click)="fadeOutAll()" disableRipple>Fade Out All</button>
   </section>
   <section>
     <div class="demo-ripple-container"

src/demo-app/ripple/ripple-demo.ts

@@ -29,10 +29,18 @@ export class RippleDemo {
 
   disableButtonRipples = false;
 
-  launchRipple(persistent = false) {
-    if (this.ripple) {
-      this.ripple.launch(0, 0, { centered: true, persistent });
+  launchRipple(persistent = false, disableAnimation = false) {
+    if (!this.ripple) {
+      return;
     }
+
+    const rippleConfig = {
+      centered: true,
+      persistent: persistent,
+      animation: disableAnimation ? {enterDuration: 0, exitDuration: 0} : undefined
+    };
+
+    this.ripple.launch(0, 0, rippleConfig);
   }
 
   fadeOutAll() {

src/lib/checkbox/checkbox.html

@@ -19,9 +19,9 @@
     <div matRipple class="mat-checkbox-ripple"
          [matRippleTrigger]="label"
          [matRippleDisabled]="_isRippleDisabled()"
-         [matRippleRadius]="_rippleConfig.radius"
-         [matRippleSpeedFactor]="_rippleConfig.speedFactor"
-         [matRippleCentered]="_rippleConfig.centered">
+         [matRippleRadius]="25"
+         [matRippleCentered]="true"
+         [matRippleAnimation]="{enterDuration: 300}">
     </div>
     <div class="mat-checkbox-frame"></div>
     <div class="mat-checkbox-background">

src/lib/checkbox/checkbox.spec.ts

@@ -4,7 +4,7 @@ import {Component, DebugElement} from '@angular/core';
 import {By} from '@angular/platform-browser';
 import {dispatchFakeEvent} from '@angular/cdk/testing';
 import {MatCheckbox, MatCheckboxChange, MatCheckboxModule} from './index';
-import {RIPPLE_FADE_IN_DURATION, RIPPLE_FADE_OUT_DURATION} from '@angular/material/core';
+import {defaultRippleAnimationConfig} from '@angular/material/core';
 import {MAT_CHECKBOX_CLICK_ACTION} from './checkbox-config';
 import {MutationObserverFactory} from '@angular/cdk/observers';
 
@@ -390,13 +390,13 @@ describe('MatCheckbox', () => {
       dispatchFakeEvent(inputElement, 'keydown');
       dispatchFakeEvent(inputElement, 'focus');
 
-      tick(RIPPLE_FADE_IN_DURATION);
+      tick(defaultRippleAnimationConfig.enterDuration);
 
       expect(fixture.nativeElement.querySelectorAll('.mat-ripple-element').length)
           .toBe(1, 'Expected ripple after element is focused.');
 
       dispatchFakeEvent(checkboxInstance._inputElement.nativeElement, 'blur');
-      tick(RIPPLE_FADE_OUT_DURATION);
+      tick(defaultRippleAnimationConfig.exitDuration);
 
       expect(fixture.nativeElement.querySelectorAll('.mat-ripple-element').length)
           .toBe(0, 'Expected no ripple after element is blurred.');

src/lib/checkbox/checkbox.ts

@@ -36,7 +36,6 @@ import {
   mixinDisabled,
   mixinDisableRipple,
   mixinTabIndex,
-  RippleConfig,
   RippleRef,
 } from '@angular/material/core';
 import {MAT_CHECKBOX_CLICK_ACTION, MatCheckboxClickAction} from './checkbox-config';
@@ -180,9 +179,6 @@ export class MatCheckbox extends _MatCheckboxMixinBase implements ControlValueAc
   /** Reference to the ripple instance of the checkbox. */
   @ViewChild(MatRipple) ripple: MatRipple;
 
-  /** Ripple configuration for the mouse ripples and focus indicators. */
-  _rippleConfig: RippleConfig = {centered: true, radius: 25, speedFactor: 1.5};
-
   /**
    * Called when the checkbox is blurred. Needed to properly implement ControlValueAccessor.
    * @docs-private
@@ -341,7 +337,7 @@ export class MatCheckbox extends _MatCheckboxMixinBase implements ControlValueAc
   /** Function is called whenever the focus changes for the input element. */
   private _onInputFocusChange(focusOrigin: FocusOrigin) {
     if (!this._focusRipple && focusOrigin === 'keyboard') {
-      this._focusRipple = this.ripple.launch(0, 0, {persistent: true, ...this._rippleConfig});
+      this._focusRipple = this.ripple.launch(0, 0, {persistent: true});
     } else if (!focusOrigin) {
       this._removeFocusRipple();
       this.onTouched();

src/lib/core/ripple/ripple-renderer.ts

@@ -9,26 +9,27 @@ import {ElementRef, NgZone} from '@angular/core';
 import {Platform, supportsPassiveEventListeners} from '@angular/cdk/platform';
 import {RippleRef, RippleState} from './ripple-ref';
 
-/** Fade-in duration for the ripples. Can be modified with the speedFactor option. */
-export const RIPPLE_FADE_IN_DURATION = 450;
-
-/** Fade-out duration for the ripples in milliseconds. This can't be modified by the speedFactor. */
-export const RIPPLE_FADE_OUT_DURATION = 400;
-
-/**
- * Timeout for ignoring mouse events. Mouse events will be temporary ignored after touch
- * events to avoid synthetic mouse events.
- */
-const IGNORE_MOUSE_EVENTS_TIMEOUT = 800;
-
 export type RippleConfig = {
   color?: string;
   centered?: boolean;
   radius?: number;
-  speedFactor?: number;
   persistent?: boolean;
+  animation?: RippleAnimationConfig;
+  /** @deprecated Use the animation property instead. */
+  speedFactor?: number;
 };
 
+/**
+ * Interface that describes the configuration for the animation of a ripple.
+ * There are two animation phases with different durations for the ripples.
+ */
+export interface RippleAnimationConfig {
+  /** Duration in milliseconds for the enter animation (expansion from point of contact). */
+  enterDuration?: number;
+  /** Duration in milliseconds for the exit animation (fade-out). */
+  exitDuration?: number;
+}
+
 /**
  * Interface that describes the target for launching ripples.
  * It defines the ripple configuration and disabled state for interaction ripples.
@@ -37,11 +38,25 @@ export type RippleConfig = {
 export interface RippleTarget {
   /** Configuration for ripples that are launched on pointer down. */
   rippleConfig: RippleConfig;
-
   /** Whether ripples on pointer down should be disabled. */
   rippleDisabled: boolean;
 }
 
+/**
+ * Default ripple animation configuration for ripples without an explicit
+ * animation config specified.
+ */
+export const defaultRippleAnimationConfig = {
+  enterDuration: 450,
+  exitDuration: 400
+};
+
+/**
+ * Timeout for ignoring mouse events. Mouse events will be temporary ignored after touch
+ * events to avoid synthetic mouse events.
+ */
+const ignoreMouseEventsTimeout = 800;
+
 /**
  * Helper service that performs DOM manipulations. Not intended to be used outside this module.
  * The constructor takes a reference to the ripple directive's host element and a map of DOM
@@ -99,16 +114,17 @@ export class RippleRenderer {
    */
   fadeInRipple(x: number, y: number, config: RippleConfig = {}): RippleRef {
     const containerRect = this._containerElement.getBoundingClientRect();
+    const animationConfig = {...defaultRippleAnimationConfig, ...config.animation};
 
     if (config.centered) {
       x = containerRect.left + containerRect.width / 2;
       y = containerRect.top + containerRect.height / 2;
     }
 
     const radius = config.radius || distanceToFurthestCorner(x, y, containerRect);
-    const duration = RIPPLE_FADE_IN_DURATION / (config.speedFactor || 1);
     const offsetX = x - containerRect.left;
     const offsetY = y - containerRect.top;
+    const duration = animationConfig.enterDuration / (config.speedFactor || 1);
 
     const ripple = document.createElement('div');
     ripple.classList.add('mat-ripple-element');
@@ -159,8 +175,9 @@ export class RippleRenderer {
     }
 
     const rippleEl = rippleRef.element;
+    const animationConfig = {...defaultRippleAnimationConfig, ...rippleRef.config.animation};
 
-    rippleEl.style.transitionDuration = `${RIPPLE_FADE_OUT_DURATION}ms`;
+    rippleEl.style.transitionDuration = `${animationConfig.exitDuration}ms`;
     rippleEl.style.opacity = '0';
 
     rippleRef.state = RippleState.FADING_OUT;
@@ -169,7 +186,7 @@ export class RippleRenderer {
     this.runTimeoutOutsideZone(() => {
       rippleRef.state = RippleState.HIDDEN;
       rippleEl.parentNode!.removeChild(rippleEl);
-    }, RIPPLE_FADE_OUT_DURATION);
+    }, animationConfig.exitDuration);
   }
 
   /** Fades out all currently active ripples. */
@@ -197,7 +214,7 @@ export class RippleRenderer {
   /** Function being called whenever the trigger is being pressed using mouse. */
   private onMousedown = (event: MouseEvent) => {
     const isSyntheticEvent = this._lastTouchStartEvent &&
-        Date.now() < this._lastTouchStartEvent + IGNORE_MOUSE_EVENTS_TIMEOUT;
+        Date.now() < this._lastTouchStartEvent + ignoreMouseEventsTimeout;
 
     if (!this._target.rippleDisabled && !isSyntheticEvent) {
       this._isPointerDown = true;

src/lib/core/ripple/ripple.md

@@ -75,8 +75,11 @@ Global ripple options can be specified by setting the `MAT_RIPPLE_GLOBAL_OPTIONS
 ```ts
 const globalRippleConfig: RippleGlobalOptions = {
   disabled: true,
-  baseSpeedFactor: 1.5 // Ripples will animate 50% faster than before.
-}
+  animation: {
+    enterDuration: 300,
+    exitDuration: 0
+  }
+};
 
 @NgModule({
   providers: [
@@ -86,3 +89,23 @@ const globalRippleConfig: RippleGlobalOptions = {
 ```
 
 All available global options can be seen in the `RippleGlobalOptions` interface.
+
+### Disabling animation
+
+The animation of ripples can be disabled by using the `animation` global option. If the 
+`enterDuration` and `exitDuration` is being set to `0`, ripples will just appear without any
+animation.
+
+This is specifically useful in combination with the `disabled` global option, because globally
+disabling ripples won't affect the focus indicator ripples. If someone still wants to disable
+those ripples for performance reasons, the duration can be set to `0`, to remove the ripple feel.
+
+```ts
+const globalRippleConfig: RippleGlobalOptions = {
+  disabled: true,
+  animation: {
+    enterDuration: 0,
+    exitDuration: 0
+  }
+};
+```