TextareaControl: Update styles (#64586)

* TextareaControl: Refactor styles

* Add 40px size prop

* Tweak typography styles

* Clarify with comment

* Remove opt-in prop

* Improve comment

* Clean up unnecessary prop type

* Add changelog

Co-authored-by: mirka <[email protected]>
Co-authored-by: tyxla <[email protected]>
Co-authored-by: ciampo <[email protected]>
Co-authored-by: jasmussen <[email protected]>
Co-authored-by: jameskoster <[email protected]>

packages/components/CHANGELOG.md

@@ -56,6 +56,7 @@
 -   `UnitControl`: Adopt radius scale ([#64368](https://github.com/WordPress/gutenberg/pull/64368)).
 -   `Popover`: allow `style` prop usage ([#64489](https://github.com/WordPress/gutenberg/pull/64489)).
 -   `ToolsPanel`: sets column-gap to 16px for ToolsPanel grid ([#64497](https://github.com/WordPress/gutenberg/pull/64497)).
+-   `TextareaControl`: Update styles ([#64586](https://github.com/WordPress/gutenberg/pull/64586)).
 
 ### Bug Fixes
 

packages/components/src/textarea-control/stories/index.story.tsx

@@ -54,4 +54,5 @@ Default.args = {
 	__nextHasNoMarginBottom: true,
 	label: 'Text',
 	help: 'Enter some text',
+	placeholder: 'Placeholder',
 };

packages/components/src/textarea-control/styles/textarea-control-styles.ts

@@ -2,13 +2,86 @@
  * External dependencies
  */
 import styled from '@emotion/styled';
+import { css } from '@emotion/react';
 
 /**
  * Internal dependencies
  */
-import { inputControl } from '../../utils/input';
+import { font } from '../../utils/font';
+import { COLORS } from '../../utils/colors-values';
+import { CONFIG } from '../../utils';
+import { breakpoint } from '../../utils/breakpoint';
+
+const inputStyleNeutral = css`
+	box-shadow: 0 0 0 transparent;
+	border-radius: ${ CONFIG.radiusSmall };
+	border: ${ CONFIG.borderWidth } solid ${ COLORS.ui.border };
+
+	@media not ( prefers-reduced-motion ) {
+		transition: box-shadow 0.1s linear;
+	}
+`;
+
+const inputStyleFocus = css`
+	border-color: ${ COLORS.theme.accent };
+	box-shadow: 0 0 0
+		calc( ${ CONFIG.borderWidthFocus } - ${ CONFIG.borderWidth } )
+		${ COLORS.theme.accent };
+
+	// Windows High Contrast mode will show this outline, but not the box-shadow.
+	outline: 2px solid transparent;
+`;
 
 export const StyledTextarea = styled.textarea`
 	width: 100%;
-	${ inputControl }
+	display: block;
+	font-family: ${ font( 'default.fontFamily' ) };
+	line-height: 20px;
+
+	// Vertical padding is to match the standard 40px control height when rows=1,
+	// in conjunction with the 20px line-height.
+	// "Standard" metrics are 10px 12px, but subtracts 1px each to account for the border width.
+	padding: 9px 11px;
+
+	${ inputStyleNeutral };
+
+	/* Fonts smaller than 16px causes mobile safari to zoom. */
+	font-size: ${ font( 'mobileTextMinFontSize' ) };
+
+	${ breakpoint( 'small' ) } {
+		font-size: ${ font( 'default.fontSize' ) };
+	}
+
+	&:focus {
+		${ inputStyleFocus }
+	}
+
+	// Use opacity to work in various editor styles.
+	&::-webkit-input-placeholder {
+		color: ${ COLORS.ui.darkGrayPlaceholder };
+	}
+
+	&::-moz-placeholder {
+		opacity: 1; // Necessary because Firefox reduces this from 1.
+		color: ${ COLORS.ui.darkGrayPlaceholder };
+	}
+
+	&:-ms-input-placeholder {
+		color: ${ COLORS.ui.darkGrayPlaceholder };
+	}
+
+	.is-dark-theme & {
+		&::-webkit-input-placeholder {
+			color: ${ COLORS.ui.lightGrayPlaceholder };
+		}
+
+		&::-moz-placeholder {
+			opacity: 1; // Necessary because Firefox reduces this from 1.
+			color: ${ COLORS.ui.lightGrayPlaceholder };
+		}
+
+		&:-ms-input-placeholder {
+			color: ${ COLORS.ui.lightGrayPlaceholder };
+		}
+	}
 `;