[terra-dropdown-button] Add support for icons in split button

packages/terra-core-docs/src/terra-dev-site/doc/dropdown-button/SplitButton.2.doc.mdx

@@ -4,6 +4,7 @@ import DefaultSplitButton from './example/DefaultSplitButton?dev-site-example';
 import GhostSplitButton from './example/GhostSplitButton?dev-site-example';
 import DisabledSplitButton from './example/DisabledSplitButton?dev-site-example';
 import BlockSplitButton from './example/BlockSplitButton?dev-site-example';
+import IconSplitButton from './example/IconSplitButton?dev-site-example';
 
 import SplitButtonPropsTable from 'terra-dropdown-button/lib/SplitButton?dev-site-props-table';
 import ItemPropsTable from 'terra-dropdown-button/lib/Item?dev-site-props-table';
@@ -46,6 +47,7 @@ import { Item, SplitButton } from 'terra-dropdown-button';
 <GhostSplitButton />
 <DisabledSplitButton />
 <BlockSplitButton />
+<IconSplitButton />
 
 ## Split Button Props
 <SplitButtonPropsTable />

packages/terra-core-docs/src/terra-dev-site/doc/dropdown-button/example/IconSplitButton.jsx

@@ -0,0 +1,61 @@
+import React from 'react';
+import { Item, SplitButton } from 'terra-dropdown-button';
+import { IconFeaturedOutlineYellow } from 'terra-icon';
+
+import classNames from 'classnames/bind';
+import styles from './IconSplitButton.module.scss';
+
+const cx = classNames.bind(styles);
+
+const Example = () => {
+  return (
+    <>
+      <SplitButton
+        primaryOptionLabel="Reply"
+        icon={<IconFeaturedOutlineYellow />}
+        onSelect={() => setMessage('Reply clicked')}
+        buttonAttrs={{
+          'aria-label': 'icon split',
+        }}
+        className={cx('icon-button')}
+      >
+        <Item label="Reply All" onSelect={() => setMessage('Reply All clicked')} />
+        <Item label="Forward" onSelect={() => setMessage('Forward clicked')} />
+        <Item label="Reply in 10 minutes" onSelect={() => setMessage('Reply in 10 minutes clicked')} />
+        <Item label="Selective Reply" onSelect={() => setMessage('Selective Reply clicked')} />
+      </SplitButton>
+      <SplitButton
+        primaryOptionLabel="Reply"
+        icon={<IconFeaturedOutlineYellow />}
+        isReversed
+        onSelect={() => setMessage('Reply clicked')}
+        buttonAttrs={{
+          'aria-label': 'reverse icon split',
+        }}
+        className={cx('icon-button')}
+      >
+        <Item label="Reply All" onSelect={() => setMessage('Reply All clicked')} />
+        <Item label="Forward" onSelect={() => setMessage('Forward clicked')} />
+        <Item label="Reply in 10 minutes" onSelect={() => setMessage('Reply in 10 minutes clicked')} />
+        <Item label="Selective Reply" onSelect={() => setMessage('Selective Reply clicked')} />
+      </SplitButton>
+      <SplitButton
+        primaryOptionLabel="Reply"
+        icon={<IconFeaturedOutlineYellow />}
+        isIconOnly
+        onSelect={() => setMessage('Reply clicked')}
+        buttonAttrs={{
+          'aria-label': 'icon only split',
+        }}
+        className={cx('icon-button')}
+      >
+        <Item label="Reply All" onSelect={() => setMessage('Reply All clicked')} />
+        <Item label="Forward" onSelect={() => setMessage('Forward clicked')} />
+        <Item label="Reply in 10 minutes" onSelect={() => setMessage('Reply in 10 minutes clicked')} />
+        <Item label="Selective Reply" onSelect={() => setMessage('Selective Reply clicked')} />
+      </SplitButton>
+    </>
+  );
+};
+
+export default Example;

packages/terra-core-docs/src/terra-dev-site/doc/dropdown-button/example/IconSplitButton.module.scss

@@ -0,0 +1,5 @@
+:local {
+  .icon-button {
+    margin: 5px;
+  }
+}

packages/terra-core-docs/src/terra-dev-site/test/dropdown-button/IconOnlySplitButton.test.jsx

@@ -0,0 +1,34 @@
+import React, { useState } from 'react';
+import classnames from 'classnames/bind';
+import { SplitButton, Item } from 'terra-dropdown-button';
+import { IconFeaturedOutlineYellow } from 'terra-icon';
+import styles from './ExtraSpacing.module.scss';
+
+const cx = classnames.bind(styles);
+
+const IconOnlySplitButton = () => {
+  const [message, setMessage] = useState(' No option clicked');
+
+  return (
+    <div className={cx('container-spacing-wrapper')}>
+      <SplitButton
+        primaryOptionLabel="Split"
+        icon={<IconFeaturedOutlineYellow />}
+        isIconOnly
+        metaData={{ key: 'primary-button' }}
+        onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }}
+        id="split"
+      >
+        <Item id="opt1" label="1st" metaData={{ key: '1st Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+        <Item id="opt2" label="2nd" metaData={{ key: '2nd Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+        <Item id="opt3" label="3rd" metaData={{ key: '3rd Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+      </SplitButton>
+      <p>
+        MetaData of :
+        {message}
+      </p>
+    </div>
+  );
+};
+
+export default IconOnlySplitButton;

packages/terra-core-docs/src/terra-dev-site/test/dropdown-button/LeftIconSplitButton.test.jsx

@@ -0,0 +1,33 @@
+import React, { useState } from 'react';
+import classnames from 'classnames/bind';
+import { SplitButton, Item } from 'terra-dropdown-button';
+import { IconFeaturedOutlineYellow } from 'terra-icon';
+import styles from './ExtraSpacing.module.scss';
+
+const cx = classnames.bind(styles);
+
+const LeftIconSplitButton = () => {
+  const [message, setMessage] = useState(' No option clicked');
+
+  return (
+    <div className={cx('container-spacing-wrapper')}>
+      <SplitButton
+        primaryOptionLabel="Split"
+        icon={<IconFeaturedOutlineYellow />}
+        metaData={{ key: 'primary-button' }}
+        onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }}
+        id="split"
+      >
+        <Item id="opt1" label="1st" metaData={{ key: '1st Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+        <Item id="opt2" label="2nd" metaData={{ key: '2nd Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+        <Item id="opt3" label="3rd" metaData={{ key: '3rd Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+      </SplitButton>
+      <p>
+        MetaData of :
+        {message}
+      </p>
+    </div>
+  );
+};
+
+export default LeftIconSplitButton;

packages/terra-core-docs/src/terra-dev-site/test/dropdown-button/RightIconSplitButton.test.jsx

@@ -0,0 +1,34 @@
+import React, { useState } from 'react';
+import classnames from 'classnames/bind';
+import { SplitButton, Item } from 'terra-dropdown-button';
+import { IconFeaturedOutlineYellow } from 'terra-icon';
+import styles from './ExtraSpacing.module.scss';
+
+const cx = classnames.bind(styles);
+
+const RightIconSplitButton = () => {
+  const [message, setMessage] = useState(' No option clicked');
+
+  return (
+    <div className={cx('container-spacing-wrapper')}>
+      <SplitButton
+        primaryOptionLabel="Split"
+        icon={<IconFeaturedOutlineYellow />}
+        isReversed
+        metaData={{ key: 'primary-button' }}
+        onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }}
+        id="split"
+      >
+        <Item id="opt1" label="1st" metaData={{ key: '1st Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+        <Item id="opt2" label="2nd" metaData={{ key: '2nd Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+        <Item id="opt3" label="3rd" metaData={{ key: '3rd Option' }} onSelect={(event, metaData) => { setMessage(` ${metaData.key}`); }} />
+      </SplitButton>
+      <p>
+        MetaData of :
+        {message}
+      </p>
+    </div>
+  );
+};
+
+export default RightIconSplitButton;

packages/terra-dropdown-button/package.json

@@ -57,5 +57,8 @@
     "LICENSE",
     "NOTICE",
     "README.md"
-  ]
+  ],
+  "devDependencies": {
+    "terra-icon": "^3.60.0"
+  }
 }

packages/terra-dropdown-button/src/SplitButton.jsx

@@ -23,6 +23,10 @@ const propTypes = {
    * The options to display in the dropdown. Should be comprised of the subcomponent `Item`.
    */
   children: PropTypes.node.isRequired,
+  /**
+   * An optional icon. Nested inline with the text when provided.
+   */
+  icon: PropTypes.element,
   /**
    * Determines whether the component should have block styles applied. The dropdown will match the component's width.
    */
@@ -35,6 +39,14 @@ const propTypes = {
    * Determines whether the primary button and expanding the dropdown should be disabled.
    */
   isDisabled: PropTypes.bool,
+  /**
+   * Whether or not the button should only display as an icon.
+   */
+  isIconOnly: PropTypes.bool,
+  /**
+   * Reverses the position of the icon and text.
+   */
+  isReversed: PropTypes.bool,
   /**
    * Sets the text that will be shown on the primary button which is outside the dropdown.
    */
@@ -190,9 +202,12 @@ class SplitButton extends React.Component {
   render() {
     const {
       children,
+      isReversed,
+      icon,
       isBlock,
       isCompact,
       isDisabled,
+      isIconOnly,
       primaryOptionLabel,
       onSelect,
       variant,
@@ -235,6 +250,30 @@ class SplitButton extends React.Component {
       theme.className,
     );
 
+    const buttonTextClassnames = cx([
+      { 'text-first': icon && isReversed },
+    ]);
+
+    const iconClassnames = cx([
+      { 'icon-first': (!isIconOnly) && !isReversed },
+    ]);
+
+    const buttonText = !isIconOnly ? <span className={buttonTextClassnames}>{primaryOptionLabel}</span> : null;
+
+    let buttonIcon = null;
+    if (icon) {
+      const iconSvgClasses = icon.props.className ? `${icon.props.className} ${cx('icon-svg')}` : cx('icon-svg');
+      const cloneIcon = React.cloneElement(icon, { className: iconSvgClasses });
+      buttonIcon = <span className={iconClassnames}>{cloneIcon}</span>;
+    }
+
+    const buttonLabel = (
+      <>
+        {isReversed ? buttonText : buttonIcon}
+        {isReversed ? buttonIcon : buttonText}
+      </>
+    );
+
     let buttonAriaLabel = '';
     const modifiedButtonAttrs = { ...buttonAttrs };
     if (modifiedButtonAttrs && modifiedButtonAttrs['aria-label']) {
@@ -270,8 +309,9 @@ class SplitButton extends React.Component {
           disabled={isDisabled}
           tabIndex={isDisabled ? '-1' : undefined}
           aria-disabled={isDisabled}
+          aria-label={isIconOnly ? primaryOptionLabel : undefined}
         >
-          {primaryOptionLabel}
+          {buttonLabel}
         </button>
         <button
           {...modifiedButtonAttrs}

packages/terra-dropdown-button/src/SplitButton.module.scss

@@ -96,4 +96,17 @@
     top: var(--terra-dropdown-button-split-type-caret-top, 0.04em);
     width: var(--terra-dropdown-button-split-type-caret-width, 1em);
   }
+
+  .text-first {
+    margin-right: var(--terra-dropdown-button-split-type-text-first-margin-right, 0.3571rem);
+  }
+
+  .icon-first {
+    margin-right: var(--terra-dropdown-button-split-type-icon-first-margin-right, 0.3571rem);
+  }
+
+  .icon-svg {
+    height: var(--terra-dropdown-button-split-type-icon-height, 1rem);
+    width: var(--terra-dropdown-button-split-type-icon-width, 1rem);
+  }
 }

packages/terra-dropdown-button/src/clinical-lowlight-theme/SplitButton.module.scss

@@ -60,6 +60,11 @@
     --terra-dropdown-button-split-type-caret-focus-outline-ghost: 2px dashed #b2b5b6;
     --terra-dropdown-button-split-type-caret-hover-box-shadow-ghost: none;
 
+    --terra-dropdown-button-split-type-text-first-margin-right: 0.3571rem;
+    --terra-dropdown-button-split-type-icon-first-margin-right: 0.3571rem;
+    --terra-dropdown-button-split-type-icon-height: 1rem;
+    --terra-dropdown-button-split-type-icon-width: 1rem;
+
     /* Icons */
     @include terra-inline-svg-var('--terra-dropdown-button-caret-active-background-image-neutral','<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" class="is-bidi"><path fill="#b2b5b6" d="M48 12L24 36 0 12h48z"/></svg>');
     @include terra-inline-svg-var('--terra-dropdown-button-caret-background-image-neutral', '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" class="is-bidi"><path fill="#b2b5b6" d="M48 12L24 36 0 12h48z"/></svg>');

packages/terra-dropdown-button/src/orion-fusion-theme/SplitButton.module.scss

@@ -60,6 +60,11 @@
     --terra-dropdown-button-split-type-caret-focus-outline-ghost: 2px dashed #000;
     --terra-dropdown-button-split-type-caret-hover-box-shadow-ghost: none;
 
+    --terra-dropdown-button-split-type-text-first-margin-right: 0.41667rem;
+    --terra-dropdown-button-split-type-icon-first-margin-right: 0.41667rem;
+    --terra-dropdown-button-split-type-icon-height: 1rem;
+    --terra-dropdown-button-split-type-icon-width: 1rem;
+
     /* Icons */
     @include terra-inline-svg-var('--terra-dropdown-button-caret-background-image-neutral', '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" class="is-bidi"><path fill="currentColor" d="M24,37.7,0,14.2l3.8-3.9L24,30,44.2,10.3,48,14.2Z"/></svg>');
     @include terra-inline-svg-var('--terra-dropdown-button-caret-active-background-image-neutral','<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" class="is-bidi"><path fill="currentColor" d="M24,37.7,0,14.2l3.8-3.9L24,30,44.2,10.3,48,14.2Z"/></svg>');