fix(CopyButton): use tooltip styles for feedback and add animation

packages/components/src/components/copy-button/_copy-button.scss

@@ -7,10 +7,12 @@
 
 @import '../../globals/scss/vars';
 @import '../../globals/scss/typography';
+@import '../../globals/scss/helper-mixins';
 @import '../../globals/scss/layer';
 @import '../../globals/scss/vendor/@carbon/elements/scss/import-once/import-once';
 @import '../../globals/scss/css--reset';
 @import '../button/button';
+@import 'keyframes';
 
 @include exports('copy-button') {
   .#{$prefix}--btn--copy {
@@ -70,4 +72,54 @@
       display: inline-flex;
     }
   }
+
+  // TODO: deprecate above styles
+  .#{$prefix}--copy-btn {
+    @include reset;
+    position: relative;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    padding: 0;
+    border: none;
+    height: $carbon--spacing-08;
+    width: $carbon--spacing-08;
+    background-color: $ui-01;
+
+    &::before {
+      @include tooltip--caret;
+      display: none;
+    }
+
+    .#{$prefix}--copy-btn__feedback {
+      @include tooltip--content('icon');
+      clip: auto;
+      margin: auto;
+      overflow: visible;
+      display: none;
+    }
+    @include tooltip--placement('icon', 'bottom', 'center');
+
+    &:focus {
+      @include focus-outline('outline');
+      outline-color: $focus;
+    }
+
+    &.#{$prefix}--copy-btn--animating::before,
+    &.#{$prefix}--copy-btn--animating .#{$prefix}--copy-btn__feedback {
+      display: block;
+    }
+
+    &.#{$prefix}--copy-btn--animating.#{$prefix}--copy-btn--fade-out::before,
+    &.#{$prefix}--copy-btn--animating.#{$prefix}--copy-btn--fade-out
+      .#{$prefix}--copy-btn__feedback {
+      animation: $duration--fast-02 motion(standard, productive) hide-feedback;
+    }
+
+    &.#{$prefix}--copy-btn--animating.#{$prefix}--copy-btn--fade-in::before,
+    &.#{$prefix}--copy-btn--animating.#{$prefix}--copy-btn--fade-in
+      .#{$prefix}--copy-btn__feedback {
+      animation: $duration--fast-02 motion(standard, productive) show-feedback;
+    }
+  }
 }

packages/components/src/components/copy-button/_keyframes.scss

@@ -0,0 +1,34 @@
+//
+// Copyright IBM Corp. 2016, 2018
+//
+// This source code is licensed under the Apache-2.0 license found in the
+// LICENSE file in the root directory of this source tree.
+//
+
+@mixin content-visible {
+  visibility: visible;
+  opacity: 1;
+}
+
+@mixin content-hidden {
+  visibility: hidden;
+  opacity: 0;
+}
+
+@keyframes hide-feedback {
+  0% {
+    @include content-visible;
+  }
+  100% {
+    @include content-hidden;
+  }
+}
+
+@keyframes show-feedback {
+  0% {
+    @include content-hidden;
+  }
+  100% {
+    @include content-visible;
+  }
+}

packages/components/src/components/copy-button/copy-button.hbs

@@ -1,11 +1,11 @@
-<!-- 
+<!--
   Copyright IBM Corp. 2016, 2018
 
   This source code is licensed under the Apache-2.0 license found in the
   LICENSE file in the root directory of this source tree.
 -->
 
-<button data-copy-btn class="{{@root.prefix}}--snippet-button" type="button" aria-label="Copy" tabindex="0">
-  {{ carbon-icon 'Copy16' class=(add @root.prefix '--snippet__icon')}}
-  <div class="{{@root.prefix}}--btn--copy__feedback" role="alert" data-feedback="Copied!"></div>
+<button data-copy-btn class="{{@root.prefix}}--copy-btn" type="button" tabindex="0">
+  <span class="{{@root.prefix}}--assistive-text {{@root.prefix}}--copy-btn__feedback">Copied!</span>
+  {{ carbon-icon 'Copy16' class=(add @root.prefix '--snippet__icon' hidden="true")}}
 </button>

packages/components/src/components/copy-button/copy-button.js

@@ -27,6 +27,19 @@ class CopyButton extends mixin(
   constructor(element, options) {
     super(element, options);
     this.manage(on(this.element, 'click', () => this.handleClick()));
+    this.manage(
+      on(this.element, 'animationend', event => this.handleAnimationEnd(event))
+    );
+  }
+
+  /**
+   * Cleanup animation classes
+   */
+  handleAnimationEnd(event) {
+    if (event.animationName === 'hide-feedback') {
+      this.element.classList.remove(this.options.classAnimating);
+      this.element.classList.remove(this.options.classFadeOut);
+    }
   }
 
   /**
@@ -39,6 +52,13 @@ class CopyButton extends mixin(
       setTimeout(() => {
         feedback.classList.remove(this.options.classShowFeedback);
       }, this.options.timeoutValue);
+    } else {
+      this.element.classList.add(this.options.classAnimating);
+      this.element.classList.add(this.options.classFadeIn);
+      setTimeout(() => {
+        this.element.classList.remove(this.options.classFadeIn);
+        this.element.classList.add(this.options.classFadeOut);
+      }, this.options.timeoutValue);
     }
   }
 
@@ -66,6 +86,9 @@ class CopyButton extends mixin(
       selectorInit: '[data-copy-btn]',
       feedbackTooltip: '[data-feedback]',
       classShowFeedback: `${prefix}--btn--copy__feedback--displayed`,
+      classAnimating: `${prefix}--copy-btn--animating`,
+      classFadeIn: `${prefix}--copy-btn--fade-in`,
+      classFadeOut: `${prefix}--copy-btn--fade-out`,
       timeoutValue: 2000,
     };
   }

packages/components/src/globals/scss/_tooltip.scss

@@ -7,6 +7,56 @@
 
 @import 'layer';
 
+// Tooltip
+// Tooltip caret visual styles
+/// @access public
+/// @group tooltip
+@mixin tooltip--caret {
+  position: absolute;
+  z-index: z('floating');
+  width: 0;
+  height: 0;
+  border-style: solid;
+  content: '';
+}
+
+// Tooltip
+// Tooltip content box visual styles
+/// @param {String} $tooltip-type ['icon'] - The type, from: `icon`, `definition`
+/// @access public
+/// @group tooltip
+@mixin tooltip--content($tooltip-type: 'icon') {
+  @include layer('overlay');
+  width: max-content;
+  max-width: rem(208px);
+  height: auto;
+  padding: if(
+    $tooltip-type == 'definition',
+    rem(8px) rem(16px),
+    rem(3px) rem(16px)
+  );
+  border-radius: rem(2px);
+  color: $inverse-01;
+  font-weight: 400;
+  text-align: left;
+  transform: translateX(-50%);
+  pointer-events: none;
+  background-color: $inverse-02;
+  @include type-style('body-short-01');
+
+  // IE media query
+  @media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
+    width: rem(208px);
+  }
+  // Edge 12-15 and Edge 16 feature queries
+  @supports (-ms-accelerator: true) {
+    width: rem(208px);
+  }
+  @supports (-ms-ime-align: auto) {
+    width: rem(208px);
+  }
+}
+
 // Tooltip
 // Definition and Icon CSS only tooltip
 /// @param {String} $tooltip-type ['icon'] - The type, from: `icon`, `definition`
@@ -42,7 +92,6 @@
   &::after,
   .#{$prefix}--assistive-text,
   + .#{$prefix}--assistive-text {
-    @include type-style('body-short-01');
     position: absolute;
     z-index: z('floating');
     display: flex;
@@ -88,38 +137,9 @@
   // content box
   // @todo Simplify CSS selectors on next major release
   &::after,
-  &:hover .#{$prefix}--assistive-text,
-  &:focus .#{$prefix}--assistive-text,
-  &:hover + .#{$prefix}--assistive-text,
-  &:focus + .#{$prefix}--assistive-text {
-    @include layer('overlay');
-    width: max-content;
-    max-width: rem(208px);
-    height: auto;
-    padding: if(
-      $tooltip-type == 'definition',
-      rem(8px) rem(16px),
-      rem(3px) rem(16px)
-    );
-    border-radius: rem(2px);
-    color: $inverse-01;
-    font-weight: 400;
-    text-align: left;
-    transform: translateX(-50%);
-    pointer-events: none;
-    background-color: $inverse-02;
-
-    // IE media query
-    @media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
-      width: rem(208px);
-    }
-    // Edge 12-15 and Edge 16 feature queries
-    @supports (-ms-accelerator: true) {
-      width: rem(208px);
-    }
-    @supports (-ms-ime-align: auto) {
-      width: rem(208px);
-    }
+  .#{$prefix}--assistive-text,
+  + .#{$prefix}--assistive-text {
+    @include tooltip--content($tooltip-type);
   }
 
   &::after {
@@ -186,10 +206,8 @@
   // @todo Simplify CSS selectors on next major release
   &::before,
   &::after,
-  &:hover .#{$prefix}--assistive-text,
-  &:focus .#{$prefix}--assistive-text,
-  &:hover + .#{$prefix}--assistive-text,
-  &:focus + .#{$prefix}--assistive-text {
+  .#{$prefix}--assistive-text,
+  + .#{$prefix}--assistive-text {
     @if ($position == 'top') {
       top: 0;
       left: 50%;
@@ -238,10 +256,10 @@
   // alignment options available only for top and bottom tooltip position
   // @todo Simplify CSS selectors on next major release
   &::after,
-  &:hover .#{$prefix}--assistive-text,
-  &:focus .#{$prefix}--assistive-text,
-  &:hover + .#{$prefix}--assistive-text,
-  &:focus + .#{$prefix}--assistive-text {
+  .#{$prefix}--assistive-text,
+  .#{$prefix}--assistive-text,
+  + .#{$prefix}--assistive-text,
+  + .#{$prefix}--assistive-text {
     @if ($position == 'top') {
       top: -$body-spacing;
       @if ($align == 'start') {

packages/react/src/components/CopyButton/CopyButton-test.js

@@ -35,8 +35,8 @@ describe('CopyButton', () => {
 
     it('Renders children as expected', () => {
       expect(wrapper.is('button')).toBe(true);
-      expect(wrapper.hasClass(`${prefix}--snippet-button`)).toBe(true);
-      expect(wrapper.find(`.${prefix}--btn--copy__feedback`).length).toBe(1);
+      expect(wrapper.hasClass(`${prefix}--copy-btn`)).toBe(true);
+      expect(wrapper.find(`.${prefix}--copy-btn__feedback`).length).toBe(1);
       expect(wrapper.find(Copy16).length).toBe(1);
     });
 
@@ -59,38 +59,32 @@ describe('CopyButton', () => {
     it('Should be able to specify the feedback message', () => {
       const feedbackWrapper = mount(<CopyButton feedback="Copied!" />);
       expect(
-        feedbackWrapper.find(`.${prefix}--btn--copy__feedback`).props()[
-          'data-feedback'
-        ]
+        feedbackWrapper.find(`.${prefix}--copy-btn__feedback`).text()
       ).toBe('Copied!');
     });
   });
 
   describe('Renders feedback as expected', () => {
     it('Should make the feedback visible', () => {
       const feedbackWrapper = mount(<CopyButton feedback="Copied!" />);
-      const feedback = () =>
-        feedbackWrapper.find(`.${prefix}--btn--copy__feedback`);
-      expect(
-        feedback().hasClass(`${prefix}--btn--copy__feedback--displayed`)
-      ).toBe(false);
-      feedbackWrapper.setState({ showFeedback: true });
-      expect(
-        feedback().hasClass(`${prefix}--btn--copy__feedback--displayed`)
-      ).toBe(true);
+      const feedback = feedbackWrapper.find(`.${prefix}--copy-btn__feedback`);
+      expect(feedback).toBeFalsy;
+      feedbackWrapper.simulate('click');
+      expect(feedback).toBeTruthy;
     });
 
     it('Should show feedback for a limited amount of time', () => {
       const feedbackWrapper = mount(
         <CopyButton feedback="Copied!" feedbackTimeout={5000} />
       );
-      expect(feedbackWrapper.state().showFeedback).toBe(false);
       feedbackWrapper.simulate('click');
-      expect(feedbackWrapper.state().showFeedback).toBe(true);
-      expect(setTimeout.mock.calls.length).toBe(2);
-      expect(setTimeout.mock.calls[1][1]).toBe(5000);
-      jest.runAllTimers();
-      expect(feedbackWrapper.state().showFeedback).toBe(false);
+      const copyButton = feedbackWrapper.find('button');
+      expect(copyButton.hasClass(`${prefix}--copy-btn--animating`)).toBe(true);
+      setTimeout(() => {
+        expect(copyButton.hasClass(`${prefix}--copy-btn--animating`)).toBe(
+          false
+        );
+      }, 5220); // 5000 + 2 * 110 (transition duration)
     });
   });