import { ElMessage } from 'element-plus';
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/**
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* 颜色转换函数
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* @method hexToRgb hex 颜色转 rgb 颜色
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* @method rgbToHex rgb 颜色转 Hex 颜色
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* @method getDarkColor 加深颜色值
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* @method getLightColor 变浅颜色值
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*/
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export function useChangeColor() {
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// str 颜色值字符串
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const hexToRgb = (str: string): any => {
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let hexs: any = '';
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let reg = /^\#?[0-9A-Fa-f]{6}$/;
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if (!reg.test(str)) {
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ElMessage.warning('输入错误的hex');
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return '';
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}
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str = str.replace('#', '');
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hexs = str.match(/../g);
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for (let i = 0; i < 3; i++) hexs[i] = parseInt(hexs[i], 16);
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return hexs;
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};
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// r 代表红色 | g 代表绿色 | b 代表蓝色
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const rgbToHex = (r: any, g: any, b: any): string => {
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let reg = /^\d{1,3}$/;
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if (!reg.test(r) || !reg.test(g) || !reg.test(b)) {
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ElMessage.warning('输入错误的rgb颜色值');
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return '';
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}
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let hexs = [r.toString(16), g.toString(16), b.toString(16)];
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for (let i = 0; i < 3; i++) if (hexs[i].length == 1) hexs[i] = `0${hexs[i]}`;
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return `#${hexs.join('')}`;
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};
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// color 颜色值字符串 | level 变浅的程度，限0-1之间
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const getDarkColor = (color: string, level: number): string => {
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let reg = /^\#?[0-9A-Fa-f]{6}$/;
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if (!reg.test(color)) {
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ElMessage.warning('输入错误的hex颜色值');
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return '';
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}
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let rgb = useChangeColor().hexToRgb(color);
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for (let i = 0; i < 3; i++) rgb[i] = Math.floor(rgb[i] * (1 - level));
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return useChangeColor().rgbToHex(rgb[0], rgb[1], rgb[2]);
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};
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// color 颜色值字符串 | level 加深的程度，限0-1之间
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const getLightColor = (color: string, level: number): string => {
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let reg = /^\#?[0-9A-Fa-f]{6}$/;
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if (!reg.test(color)) {
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ElMessage.warning('输入错误的hex颜色值');
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return '';
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}
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let rgb = useChangeColor().hexToRgb(color);
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for (let i = 0; i < 3; i++) rgb[i] = Math.floor((255 - rgb[i]) * level + rgb[i]);
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return useChangeColor().rgbToHex(rgb[0], rgb[1], rgb[2]);
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};
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return {
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hexToRgb,
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rgbToHex,
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getDarkColor,
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getLightColor,
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};
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}
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