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import { useEffect, useRef, useState } from '@wordpress/element'; |
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import { __ } from '@wordpress/i18n'; |
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import { Lang, Theme } from 'shiki'; |
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import { useTheme } from '../../hooks/useTheme'; |
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|
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type ThemePreviewProps = { |
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id: string; |
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theme: Theme; |
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lang: Lang; |
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code: string; |
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onClick: () => void; |
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}; |
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export const ThemePreview = ({ |
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id, |
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theme, |
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lang, |
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onClick, |
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code, |
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}: ThemePreviewProps) => { |
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const [inView, setInView] = useState(false); |
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const { highlighter, error, loading } = useTheme({ |
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theme, |
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// If no code is written yet, show a classic Carmack snippet |
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lang: code ? lang : 'c', |
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ready: inView, |
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}); |
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const [codeRendered, setCode] = useState(''); |
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const [backgroundColor, setBg] = useState('#ffffff'); |
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const observer = useRef<IntersectionObserver>( |
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new IntersectionObserver(([entry]) => { |
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if (entry.isIntersecting) { |
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setInView(true); |
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observer.current.disconnect(); |
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} |
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}), |
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); |
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const codeSnippet = ` |
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float Q_rsqrt( float number ) |
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{ |
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long i; |
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float x2, y; |
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const float threehalfs = 1.5F; |
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|
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x2 = number * 0.5F; |
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y = number; |
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i = * ( long * ) &y; // evil floating point bit level hacking |
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i = 0x5f3759df - ( i >> 1 ); // what the frack? |
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y = * ( float * ) &i; |
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y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration |
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// y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed |
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|
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return y; |
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}`.trim(); |
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|
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useEffect(() => { |
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if (!highlighter) return; |
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const hl = code |
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? highlighter.codeToHtml(code, { lang }) |
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: highlighter.codeToHtml(codeSnippet, { lang: 'c' }); |
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setCode(hl); |
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setBg(highlighter.getBackgroundColor()); |
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}, [highlighter, lang, code, codeSnippet]); |
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|
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return ( |
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<button |
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id={id} |
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type="button" |
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onClick={onClick} |
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className="p-4 px-3 border flex items-start w-full text-left outline-none cursor-pointer no-underline ring-offset-2 ring-offset-white focus:shadow-none focus:ring-wp overflow-x-scroll" |
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style={{ backgroundColor, minHeight: '50px' }}> |
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{loading || error || !inView ? ( |
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<span |
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id={id} |
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ref={(el) => { |
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if (!el) return; |
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observer.current.observe(el); |
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}} |
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style={{ minHeight: '200px' }} |
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className="flex items-center justify-center p-6 bg-gray-50"> |
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{error?.message || __('Loading...', 'code-block-pro')} |
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</span> |
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) : ( |
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<span |
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className="pointer-events-none" |
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dangerouslySetInnerHTML={{ __html: codeRendered }} |
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/> |
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)} |
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</button> |
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); |
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}; |
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