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import { useState, useRef, useEffect, useCallback } from '@wordpress/element'; |
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import { __ } from '@wordpress/i18n'; |
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|
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// ── Color math helpers ──────────────────────────────────────────────────────── |
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|
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function clamp( v, lo, hi ) { return Math.max( lo, Math.min( hi, v ) ); } |
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|
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function hsvToRgb( h, s, v ) { |
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const c = v * s; |
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const x = c * ( 1 - Math.abs( ( ( h / 60 ) % 2 ) - 1 ) ); |
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const m = v - c; |
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let r = 0, g = 0, b = 0; |
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if ( h < 60 ) { r = c; g = x; } |
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else if ( h < 120 ) { r = x; g = c; } |
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else if ( h < 180 ) { g = c; b = x; } |
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else if ( h < 240 ) { g = x; b = c; } |
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else if ( h < 300 ) { r = x; b = c; } |
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else { r = c; b = x; } |
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return [ |
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Math.round( ( r + m ) * 255 ), |
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Math.round( ( g + m ) * 255 ), |
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Math.round( ( b + m ) * 255 ), |
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]; |
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} |
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|
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function rgbToHsv( r, g, b ) { |
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r /= 255; g /= 255; b /= 255; |
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const max = Math.max( r, g, b ), min = Math.min( r, g, b ), d = max - min; |
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let h = 0; |
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const s = max === 0 ? 0 : d / max; |
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const v = max; |
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if ( d !== 0 ) { |
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if ( max === r ) h = ( ( g - b ) / d + ( g < b ? 6 : 0 ) ) / 6; |
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else if ( max === g ) h = ( ( b - r ) / d + 2 ) / 6; |
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else h = ( ( r - g ) / d + 4 ) / 6; |
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} |
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return { h: h * 360, s, v }; |
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} |
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|
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function hexToRgb( hex ) { |
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const c = hex.replace( '#', '' ); |
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const f = c.length === 3 ? c.split( '' ).map( x => x + x ).join( '' ) : c; |
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return [ |
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parseInt( f.slice( 0, 2 ), 16 ), |
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parseInt( f.slice( 2, 4 ), 16 ), |
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parseInt( f.slice( 4, 6 ), 16 ), |
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]; |
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} |
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|
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function rgbToHex( r, g, b ) { |
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return '#' + [ r, g, b ] |
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.map( v => clamp( Math.round( v ), 0, 255 ).toString( 16 ).padStart( 2, '0' ) ) |
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.join( '' ) |
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.toUpperCase(); |
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} |
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|
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function hexToHsv( hex ) { |
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try { |
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const [ r, g, b ] = hexToRgb( hex ); |
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return rgbToHsv( r, g, b ); |
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} catch ( e ) { |
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return { h: 0, s: 0, v: 0 }; |
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} |
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} |
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|
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function hsvToHex( h, s, v ) { |
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return rgbToHex( ...hsvToRgb( h, s, v ) ); |
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} |
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|
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function rgbToHsl( r, g, b ) { |
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r /= 255; g /= 255; b /= 255; |
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const max = Math.max( r, g, b ), min = Math.min( r, g, b ); |
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const l = ( max + min ) / 2; |
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let h = 0, s = 0; |
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const d = max - min; |
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if ( d !== 0 ) { |
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s = d / ( 1 - Math.abs( 2 * l - 1 ) ); |
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if ( max === r ) h = ( ( g - b ) / d + ( g < b ? 6 : 0 ) ) / 6; |
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else if ( max === g ) h = ( ( b - r ) / d + 2 ) / 6; |
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else h = ( ( r - g ) / d + 4 ) / 6; |
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} |
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return { h: Math.round( h * 360 ), s: Math.round( s * 100 ), l: Math.round( l * 100 ) }; |
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} |
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|
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function hslToHex( h, s, l ) { |
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s /= 100; l /= 100; |
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const c = ( 1 - Math.abs( 2 * l - 1 ) ) * s; |
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const x = c * ( 1 - Math.abs( ( h / 60 ) % 2 - 1 ) ); |
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const m = l - c / 2; |
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let r = 0, g = 0, b = 0; |
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if ( h < 60 ) { r = c; g = x; } |
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else if ( h < 120 ) { r = x; g = c; } |
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else if ( h < 180 ) { g = c; b = x; } |
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else if ( h < 240 ) { g = x; b = c; } |
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else if ( h < 300 ) { r = x; b = c; } |
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else { r = c; b = x; } |
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return rgbToHex( |
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Math.round( ( r + m ) * 255 ), |
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Math.round( ( g + m ) * 255 ), |
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Math.round( ( b + m ) * 255 ), |
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); |
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} |
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|
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// ── Constants ───────────────────────────────────────────────────────────────── |
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|
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const PRESETS = [ '#2B66D1', '#7BB8F0', '#5AA152', '#F0C030', '#E8613A', '#D4567A' ]; |
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const CANVAS_W = 260; |
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const CANVAS_H = 130; |
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|
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// ── Component ───────────────────────────────────────────────────────────────── |
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|
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export default function ColorPicker( { value, defaultValue, onChange, onClose } ) { |
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const safe = /^#[0-9a-fA-F]{6}$/.test( value ) ? value : ( defaultValue || '#000000' ); |
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const initHsv = hexToHsv( safe ); |
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|
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const [ hue, setHue ] = useState( initHsv.h ); |
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const [ sat, setSat ] = useState( initHsv.s ); |
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const [ val, setVal ] = useState( initHsv.v ); |
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const [ mode, setMode ] = useState( 'hex' ); |
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const [ hexInput, setHexInput ] = useState( safe.toUpperCase() ); |
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|
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const canvasRef = useRef( null ); |
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const dragging = useRef( false ); |
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|
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const currentHex = hsvToHex( hue, sat, val ); |
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const [ r, g, b ] = hexToRgb( currentHex ); |
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const hsl = rgbToHsl( r, g, b ); |
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|
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// Draw SV gradient whenever hue changes. |
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useEffect( () => { |
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const canvas = canvasRef.current; |
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if ( ! canvas ) return; |
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const ctx = canvas.getContext( '2d' ); |
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const w = canvas.width, h = canvas.height; |
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|
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const gH = ctx.createLinearGradient( 0, 0, w, 0 ); |
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gH.addColorStop( 0, '#fff' ); |
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gH.addColorStop( 1, `hsl(${ hue },100%,50%)` ); |
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ctx.fillStyle = gH; |
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ctx.fillRect( 0, 0, w, h ); |
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|
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const gV = ctx.createLinearGradient( 0, 0, 0, h ); |
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gV.addColorStop( 0, 'rgba(0,0,0,0)' ); |
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gV.addColorStop( 1, '#000' ); |
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ctx.fillStyle = gV; |
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ctx.fillRect( 0, 0, w, h ); |
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}, [ hue ] ); |
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|
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const pickFromCanvas = useCallback( ( e ) => { |
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const canvas = canvasRef.current; |
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if ( ! canvas ) return; |
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const rect = canvas.getBoundingClientRect(); |
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const x = clamp( ( e.clientX - rect.left ) / rect.width, 0, 1 ); |
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const y = clamp( ( e.clientY - rect.top ) / rect.height, 0, 1 ); |
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const ns = x, nv = 1 - y; |
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setSat( ns ); setVal( nv ); |
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const hex = hsvToHex( hue, ns, nv ); |
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setHexInput( hex ); |
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onChange( hex ); |
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}, [ hue, onChange ] ); |
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|
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// Global mouse-move / up for canvas drag. |
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useEffect( () => { |
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const onMove = ( e ) => { if ( dragging.current ) pickFromCanvas( e ); }; |
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const onUp = () => { dragging.current = false; }; |
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window.addEventListener( 'mousemove', onMove ); |
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window.addEventListener( 'mouseup', onUp ); |
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return () => { |
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window.removeEventListener( 'mousemove', onMove ); |
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window.removeEventListener( 'mouseup', onUp ); |
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}; |
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}, [ pickFromCanvas ] ); |
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|
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// Apply a hex string and sync all state. |
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const applyHex = useCallback( ( hex ) => { |
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const clean = hex.toUpperCase(); |
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const hsv = hexToHsv( clean ); |
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setHue( hsv.h ); setSat( hsv.s ); setVal( hsv.v ); |
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setHexInput( clean ); |
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onChange( clean ); |
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}, [ onChange ] ); |
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|
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const handleHueChange = ( e ) => { |
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const h = parseFloat( e.target.value ); |
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setHue( h ); |
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const hex = hsvToHex( h, sat, val ); |
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setHexInput( hex ); |
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onChange( hex ); |
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}; |
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|
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const handleHexInput = ( e ) => { |
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const raw = e.target.value; |
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setHexInput( raw ); |
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if ( /^#[0-9a-fA-F]{6}$/.test( raw ) ) { |
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const hsv = hexToHsv( raw ); |
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setHue( hsv.h ); setSat( hsv.s ); setVal( hsv.v ); |
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onChange( raw.toUpperCase() ); |
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} |
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}; |
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|
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const handleRgbChange = ( channel ) => ( e ) => { |
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const next = { r, g, b, [ channel ]: clamp( parseInt( e.target.value, 10 ) || 0, 0, 255 ) }; |
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applyHex( rgbToHex( next.r, next.g, next.b ) ); |
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}; |
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|
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const handleHslChange = ( channel ) => ( e ) => { |
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const limits = { h: [ 0, 360 ], s: [ 0, 100 ], l: [ 0, 100 ] }; |
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const [ lo, hi ] = limits[ channel ]; |
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const next = { ...hsl, [ channel ]: clamp( parseInt( e.target.value, 10 ) || 0, lo, hi ) }; |
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applyHex( hslToHex( next.h, next.s, next.l ) ); |
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}; |
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|
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return ( |
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<div className="bp-color-picker"> |
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|
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{ /* Gradient canvas */ } |
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<div className="bp-color-picker__canvas-wrap"> |
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<canvas |
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ref={ canvasRef } |
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width={ CANVAS_W } |
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height={ CANVAS_H } |
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className="bp-color-picker__canvas" |
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onMouseDown={ ( e ) => { dragging.current = true; pickFromCanvas( e ); } } |
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/> |
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<div |
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className="bp-color-picker__cursor" |
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style={ { left: `${ sat * 100 }%`, top: `${ ( 1 - val ) * 100 }%` } } |
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/> |
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</div> |
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|
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{ /* Hue slider */ } |
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<input |
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type="range" |
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className="bp-color-picker__hue" |
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min="0" max="360" step="1" |
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value={ Math.round( hue ) } |
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onChange={ handleHueChange } |
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/> |
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|
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{ /* Preview + mode input */ } |
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<div className="bp-color-picker__preview-row"> |
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<div className="bp-color-picker__swatch-preview" style={ { background: currentHex } } /> |
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|
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{ mode === 'hex' && ( |
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<input |
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type="text" |
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className="bp-color-picker__text-input" |
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value={ hexInput } |
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onChange={ handleHexInput } |
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onBlur={ () => setHexInput( currentHex ) } |
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maxLength={ 7 } |
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spellCheck={ false } |
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/> |
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) } |
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|
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{ mode === 'rgb' && ( |
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<div className="bp-color-picker__channel-inputs"> |
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{ [ [ 'r', r ], [ 'g', g ], [ 'b', b ] ].map( ( [ ch, cv ] ) => ( |
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<input key={ ch } type="number" min="0" max="255" |
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value={ cv } onChange={ handleRgbChange( ch ) } /> |
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) ) } |
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</div> |
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) } |
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|
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{ mode === 'hsl' && ( |
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<div className="bp-color-picker__channel-inputs"> |
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{ [ [ 'h', hsl.h, 360 ], [ 's', hsl.s, 100 ], [ 'l', hsl.l, 100 ] ].map( ( [ ch, cv, mx ] ) => ( |
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<input key={ ch } type="number" min="0" max={ mx } |
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value={ cv } onChange={ handleHslChange( ch ) } /> |
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) ) } |
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</div> |
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) } |
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</div> |
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|
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{ /* Mode tabs */ } |
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<div className="bp-color-picker__modes"> |
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{ [ 'hex', 'rgb', 'hsl' ].map( ( m ) => ( |
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<button key={ m } type="button" |
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className={ `bp-color-picker__mode-btn${ mode === m ? ' is-active' : '' }` } |
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onClick={ () => setMode( m ) } |
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> |
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{ m.toUpperCase() } |
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</button> |
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) ) } |
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</div> |
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|
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{ /* Preset swatches */ } |
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<div className="bp-color-picker__presets"> |
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{ PRESETS.map( ( hex ) => ( |
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<button key={ hex } type="button" |
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className="bp-color-picker__preset" |
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style={ { background: hex } } |
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onClick={ () => applyHex( hex ) } |
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/> |
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) ) } |
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</div> |
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|
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{ /* Actions */ } |
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<div className="bp-color-picker__actions"> |
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<button type="button" className="bp-color-picker__action-btn" |
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onClick={ () => applyHex( defaultValue || '#000000' ) } |
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> |
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{ __( 'Reset', 'better-payment' ) } |
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</button> |
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<button type="button" className="bp-color-picker__action-btn" |
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onClick={ onClose } |
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> |
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{ __( 'Close', 'better-payment' ) } |
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</button> |
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</div> |
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</div> |
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); |
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} |
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|
