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

packages/components/src/components/code-snippet/_code-snippet.scss

@@ -11,6 +11,8 @@
 @import '../../globals/scss/vendor/@carbon/elements/scss/import-once/import-once';
 @import '../../globals/scss/css--reset';
 @import '../../globals/scss/theme-tokens';
+@import '../../globals/scss/tooltip';
+@import '../../globals/scss/keyframes';
 @import 'mixins';
 
 /// Code snippet styles
@@ -50,6 +52,37 @@
       outline: none;
       border: 2px solid $focus;
     }
+
+    &::before {
+      @include tooltip--caret;
+      display: none;
+    }
+
+    .#{$prefix}--copy-btn__feedback {
+      @include tooltip--content('icon');
+      clip: auto;
+      margin: auto;
+      overflow: visible;
+      display: none;
+    }
+    @include tooltip--placement('icon', 'bottom', 'center');
+
+    &.#{$prefix}--copy-btn--animating::before,
+    &.#{$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;
+    }
   }
 
   .#{$prefix}--snippet--inline code {
@@ -213,6 +246,16 @@
     border: none;
   }
 
+  // TODO: remove copy button styles above
+  .#{$prefix}--snippet .#{$prefix}--copy-btn {
+    position: absolute;
+    top: 0;
+    right: 0;
+    @include carbon--font-family(
+      'sans'
+    ); // Override inherited rule in code snippet
+  }
+
   // Show more / less button
   button.#{$prefix}--btn.#{$prefix}--snippet-btn--expand {
     display: inline-flex;

packages/components/src/components/code-snippet/code-snippet.hbs

@@ -7,17 +7,19 @@
 
 {{#is variant "inline"}}
 <p>Here is an example of a text that a user would be reading. In this paragraph would be
-  <button data-copy-btn="" type="button" class="{{@root.prefix}}--snippet {{@root.prefix}}--snippet--inline {{@root.prefix}}--btn--copy{{#if light}} {{@root.prefix}}--snippet--light{{/if}}"
+  <button data-copy-btn type="button"
+    class="{{@root.prefix}}--snippet {{@root.prefix}}--snippet--inline {{#if light}} {{@root.prefix}}--snippet--light{{/if}}"
     aria-label="Copy code" tabindex="0">
     <code>inline code</code>
-    <div class="{{@root.prefix}}--btn--copy__feedback" role="alert" data-feedback="Copied!"></div>
+    <span class="{{@root.prefix}}--assistive-text {{@root.prefix}}--copy-btn__feedback">Copied!</span>
   </button>
   that the user could look at and copy in to their code editor.</p>
 {{else}}
 
 <div class="{{@root.prefix}}--snippet {{@root.prefix}}--snippet--{{variant}}" {{#is variant "multi"}}
-  data-code-snippet{{/is}}> <div class="{{@root.prefix}}--snippet-container" aria-label="Code Snippet Text">
-  <pre>
+  data-code-snippet{{/is}}>
+  <div class="{{@root.prefix}}--snippet-container" aria-label="Code Snippet Text">
+    <pre>
 <code>@mixin grid-container {
     width: 100%;
     padding-right: padding(mobile);
@@ -40,22 +42,24 @@
     floating: 10000
   );</code>
     </pre>
-</div>
-<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>
-{{#is variant "multi"}}
-<button class="{{@root.prefix}}--btn {{@root.prefix}}--btn--ghost {{@root.prefix}}--btn--sm {{@root.prefix}}--snippet-btn--expand"
-  type="button">
-  <span class="{{@root.prefix}}--snippet-btn--text" data-show-more-text="Show more" data-show-less-text="Show less">Show
-    more</span>
-  {{ carbon-icon 'ChevronDown16' class=(add
+  </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>
+  {{#is variant "multi"}}
+  <button
+    class="{{@root.prefix}}--btn {{@root.prefix}}--btn--ghost {{@root.prefix}}--btn--sm {{@root.prefix}}--snippet-btn--expand"
+    type="button">
+    <span class="{{@root.prefix}}--snippet-btn--text" data-show-more-text="Show more"
+      data-show-less-text="Show less">Show
+      more</span>
+    {{ carbon-icon 'ChevronDown16' class=(add
   (add @root.prefix '--icon-chevron--down')
   (add ' ' (add @root.prefix '--snippet__icon'))
   )
   aria-label="Show more icon"}}
-</button>
-{{/is}}
+  </button>
+  {{/is}}
 </div>
 {{/is}}

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

@@ -12,7 +12,8 @@
 @import '../../globals/scss/vendor/@carbon/elements/scss/import-once/import-once';
 @import '../../globals/scss/css--reset';
 @import '../button/button';
-@import 'keyframes';
+@import '../../globals/scss/tooltip';
+@import '../../globals/scss/keyframes';
 
 @include exports('copy-button') {
   .#{$prefix}--btn--copy {
@@ -85,6 +86,11 @@
     height: $carbon--spacing-08;
     width: $carbon--spacing-08;
     background-color: $ui-01;
+    cursor: pointer;
+
+    &:hover {
+      background-color: $hover-ui;
+    }
 
     &::before {
       @include tooltip--caret;

packages/react/src/components/CodeSnippet/CodeSnippet.js

@@ -78,7 +78,6 @@ function CodeSnippet({
         </code>
       </div>
       <CopyButton
-        className={`${prefix}--snippet-button`}
         onClick={onClick}
         feedback={feedback}
         iconDescription={copyButtonDescription}

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

@@ -52,38 +52,32 @@ describe('Copy', () => {
     it('Should be able to specify the feedback message', () => {
       const feedbackWrapper = mount(<Copy 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(<Copy 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(
         <Copy 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)
     });
   });
 

packages/react/src/components/Copy/Copy.js

@@ -6,91 +6,101 @@
  */
 
 import PropTypes from 'prop-types';
-import React, { Component } from 'react';
+import React, { useState, useEffect, useCallback } from 'react';
+import debounce from 'lodash.debounce';
 import classnames from 'classnames';
 import { settings } from 'carbon-components';
+import { composeEventHandlers } from '../../tools/events';
 
 const { prefix } = settings;
 
-export default class Copy extends Component {
-  static propTypes = {
-    /**
-     * Pass in content to be rendred in the underlying <button>
-     */
-    children: PropTypes.node,
-
-    /**
-     * Specify an optional className to be applied to the underlying <button>
-     */
-    className: PropTypes.string,
-
-    /**
-     * Specify the string that is displayed when the button is clicked and the
-     * content is copied
-     */
-    feedback: PropTypes.string,
-
-    /**
-     * Specify the time it takes for the feedback message to timeout
-     */
-    feedbackTimeout: PropTypes.number,
-
-    /**
-     * Specify an optional `onClick` handler that is called when the underlying
-     * <button> is clicked
-     */
-    onClick: PropTypes.func,
+export default function Copy({
+  children,
+  className,
+  feedback,
+  feedbackTimeout,
+  onAnimationEnd,
+  onClick,
+  ...other
+}) {
+  const [animation, setAnimation] = useState('');
+  const classNames = classnames(className, {
+    [`${prefix}--copy-btn--animating`]: animation,
+    [`${prefix}--copy-btn--${animation}`]: animation,
+  });
+  const handleFadeOut = useCallback(
+    debounce(() => {
+      setAnimation('fade-out');
+    }, feedbackTimeout),
+    [feedbackTimeout]
+  );
+  const handleClick = useCallback(() => {
+    setAnimation('fade-in');
+    handleFadeOut();
+  }, [handleFadeOut]);
+  const handleAnimationEnd = event => {
+    if (event.animationName === 'hide-feedback') {
+      setAnimation('');
+    }
   };
 
-  static defaultProps = {
-    feedback: 'Copied!',
-    feedbackTimeout: 2000,
-    onClick: () => {},
-  };
+  useEffect(
+    () => () => {
+      handleFadeOut.cancel();
+    },
+    [handleFadeOut]
+  );
 
-  state = {
-    showFeedback: false,
-  };
+  return (
+    <button
+      type="button"
+      className={classNames}
+      onClick={composeEventHandlers([onClick, handleClick])}
+      onAnimationEnd={composeEventHandlers([
+        onAnimationEnd,
+        handleAnimationEnd,
+      ])}
+      {...other}>
+      {children}
+      <span
+        className={`${prefix}--assistive-text ${prefix}--copy-btn__feedback`}>
+        {feedback}
+      </span>
+    </button>
+  );
+}
 
-  /* istanbul ignore next */
-  componentWillUnmount() {
-    if (typeof this.timeoutId !== 'undefined') {
-      clearTimeout(this.timeoutId);
-      delete this.timeoutId;
-    }
-  }
+Copy.propTypes = {
+  /**
+   * Pass in content to be rendred in the underlying <button>
+   */
+  children: PropTypes.node,
 
-  handleClick = evt => {
-    this.setState({ showFeedback: true });
-    this.timeoutId = setTimeout(() => {
-      this.setState({ showFeedback: false });
-    }, this.props.feedbackTimeout);
+  /**
+   * Specify an optional className to be applied to the underlying <button>
+   */
+  className: PropTypes.string,
 
-    this.props.onClick(evt);
-  }; // eslint-disable-line no-unused-vars
+  /**
+   * Specify the string that is displayed when the button is clicked and the
+   * content is copied
+   */
+  feedback: PropTypes.string,
 
-  render() {
-    const {
-      className,
-      feedback,
-      children,
-      feedbackTimeout, // eslint-disable-line no-unused-vars
-      onClick, // eslint-disable-line no-unused-vars
-      ...other
-    } = this.props;
-    const feedbackClassNames = classnames(`${prefix}--btn--copy__feedback`, {
-      [`${prefix}--btn--copy__feedback--displayed`]: this.state.showFeedback,
-    });
+  /**
+   * Specify the time it takes for the feedback message to timeout
+   */
+  feedbackTimeout: PropTypes.number,
 
-    return (
-      <button
-        type="button"
-        className={className}
-        onClick={this.handleClick}
-        {...other}>
-        {children}
-        <div className={feedbackClassNames} data-feedback={feedback} />
-      </button>
-    );
-  }
-}
+  /**
+   * Specify an optional `onClick` handler that is called when the underlying
+   * <button> is clicked
+   */
+  onClick: PropTypes.func,
+};
+
+Copy.defaultProps = {
+  feedback: 'Copied!',
+  feedbackTimeout: 2000,
+  onClick: () => {},
+};