@choerodon/master/lib/containers/components/c7n/master/colorPalette.js

A package of Master for Choerodon platform.

/* eslint-disable */
import tinycolor from "./tinyColor";
var hueStep = 2;
var saturationStep = 16;
var saturationStep2 = 5;
var brightnessStep1 = 5;
var brightnessStep2 = 15;
var lightColorCount = 5;
var darkColorCount = 4;

function getHue(hsv, i, isLight) {
  var hue;

  if (hsv.h >= 60 && hsv.h <= 240) {
    hue = isLight ? hsv.h - hueStep * i : hsv.h + hueStep * i;
  } else {
    hue = isLight ? hsv.h + hueStep * i : hsv.h - hueStep * i;
  }

  if (hue < 0) {
    hue += 360;
  } else if (hue >= 360) {
    hue -= 360;
  }

  return Math.round(hue);
}

function getSaturation(hsv, i, isLight) {
  var saturation;

  if (isLight) {
    saturation = Math.round(hsv.s * 100) - saturationStep * i;
  } else if (i == darkColorCount) {
    saturation = Math.round(hsv.s * 100) + saturationStep;
  } else {
    saturation = Math.round(hsv.s * 100) + saturationStep2 * i;
  }

  if (saturation > 100) {
    saturation = 100;
  }

  if (isLight && i === lightColorCount && saturation > 10) {
    saturation = 10;
  }

  if (saturation < 6) {
    saturation = 6;
  }

  return Math.round(saturation);
}

function getValue(hsv, i, isLight) {
  if (isLight) {
    return Math.round(hsv.v * 100) + brightnessStep1 * i;
  }

  return Math.round(hsv.v * 100) - brightnessStep2 * i;
}

function colorPalette(color, index) {
  var isLight = index <= 6;
  var hsv = tinycolor(color).toHsv();
  var i = isLight ? lightColorCount + 1 - index : index - lightColorCount - 1;
  return tinycolor({
    h: getHue(hsv, i, isLight),
    s: getSaturation(hsv, i, isLight),
    v: getValue(hsv, i, isLight)
  }).toHexString();
}

export default colorPalette;