147 lines
3.7 KiB
TypeScript
147 lines
3.7 KiB
TypeScript
import { colord, extend } from 'colord';
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import mixPlugin from 'colord/plugins/mix';
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import type { HsvColor } from 'colord';
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extend([mixPlugin]);
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type ColorIndex = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10;
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const hueStep = 2;
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const saturationStep = 16;
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const saturationStep2 = 5;
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const brightnessStep1 = 5;
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const brightnessStep2 = 15;
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const lightColorCount = 5;
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const darkColorCount = 4;
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/**
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* 根据颜色获取调色板颜色(从左至右颜色从浅到深，6为主色号)
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* @param color - 颜色
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* @param index - 调色板的对应的色号(6为主色号)
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* @description 算法实现从ant-design调色板算法中借鉴 https://github.com/ant-design/ant-design/blob/master/components/style/color/colorPalette.less
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*/
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export function getColorPalette(color: string, index: ColorIndex) {
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if (index === 6) return color;
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const isLight = index < 6;
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const hsv = colord(color).toHsv();
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const i = isLight ? lightColorCount + 1 - index : index - lightColorCount - 1;
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const newHsv: HsvColor = {
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h: getHue(hsv, i, isLight),
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s: getSaturation(hsv, i, isLight),
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v: getValue(hsv, i, isLight)
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};
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return colord(newHsv).toHex();
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}
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/**
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* 根据颜色获取调色板颜色所有颜色
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* @param color - 颜色
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*/
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export function getAllColorPalette(color: string) {
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const indexs: ColorIndex[] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
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return indexs.map(index => getColorPalette(color, index));
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}
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/**
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* 获取色相渐变
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* @param hsv - hsv格式颜色值
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* @param i - 与6的相对距离
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* @param isLight - 是否是亮颜色
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*/
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function getHue(hsv: HsvColor, i: number, isLight: boolean) {
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let hue: number;
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if (hsv.h >= 60 && hsv.h <= 240) {
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// 冷色调
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// 减淡变亮 色相顺时针旋转 更暖
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// 加深变暗 色相逆时针旋转 更冷
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hue = isLight ? hsv.h - hueStep * i : hsv.h + hueStep * i;
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} else {
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// 暖色调
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// 减淡变亮 色相逆时针旋转 更暖
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// 加深变暗 色相顺时针旋转 更冷
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hue = isLight ? hsv.h + hueStep * i : hsv.h - hueStep * i;
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}
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if (hue < 0) {
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hue += 360;
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} else if (hue >= 360) {
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hue -= 360;
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}
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return hue;
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}
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/**
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* 获取饱和度渐变
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* @param hsv - hsv格式颜色值
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* @param i - 与6的相对距离
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* @param isLight - 是否是亮颜色
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*/
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function getSaturation(hsv: HsvColor, i: number, isLight: boolean) {
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let saturation: number;
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if (isLight) {
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saturation = hsv.s - saturationStep * i;
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} else if (i === darkColorCount) {
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saturation = hsv.s + saturationStep;
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} else {
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saturation = hsv.s + saturationStep2 * i;
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}
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if (saturation > 100) {
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saturation = 100;
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}
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if (isLight && i === lightColorCount && saturation > 10) {
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saturation = 10;
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}
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if (saturation < 6) {
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saturation = 6;
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}
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return saturation;
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}
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/**
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* 获取明度渐变
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* @param hsv - hsv格式颜色值
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* @param i - 与6的相对距离
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* @param isLight - 是否是亮颜色
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*/
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function getValue(hsv: HsvColor, i: number, isLight: boolean) {
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let value: number;
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if (isLight) {
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value = hsv.v + brightnessStep1 * i;
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} else {
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value = hsv.v - brightnessStep2 * i;
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}
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if (value > 100) {
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value = 100;
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}
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return value;
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}
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/**
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* 给颜色加透明度
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* @param color - 颜色
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* @param alpha - 透明度(0 - 1)
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*/
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export function addColorAlpha(color: string, alpha: number) {
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return colord(color).alpha(alpha).toHex();
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}
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/**
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* 颜色混合
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* @param firstColor - 第一个颜色
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* @param secondColor - 第二个颜色
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* @param ratio - 第二个颜色占比
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*/
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export function mixColor(firstColor: string, secondColor: string, ratio: number) {
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return colord(firstColor).mix(secondColor, ratio).toHex();
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}
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/**
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* 是否是白颜色
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* @param color - 颜色
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*/
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export function isWhiteColor(color: string) {
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return colord(color).isEqual('#ffffff');
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}
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