PaletteUtils.java

package com.alorma.github.ui.utils;

import android.graphics.Color;
import android.support.v7.graphics.Palette;

public class PaletteUtils {

  public static Palette.Swatch getProfileSwatch(Palette palette) {
    if (palette != null) {
      Palette.Swatch vibrantSwatch = palette.getVibrantSwatch();
      Palette.Swatch lightVibrantSwatch = palette.getLightVibrantSwatch();
      Palette.Swatch darkVibrantSwatch = palette.getDarkVibrantSwatch();
      Palette.Swatch mutedSwatch = palette.getMutedSwatch();
      Palette.Swatch lightMutedSwatch = palette.getLightMutedSwatch();
      Palette.Swatch darkMutedSwatch = palette.getDarkMutedSwatch();
      Palette.Swatch item = null;
      if (vibrantSwatch != null) {
        item = vibrantSwatch;
      } else if (darkVibrantSwatch != null) {
        item = darkVibrantSwatch;
      } else if (lightMutedSwatch != null) {
        item = lightMutedSwatch;
      } else if (darkMutedSwatch != null) {
        item = darkMutedSwatch;
      } else if (mutedSwatch != null) {
        item = mutedSwatch;
      } else if (lightVibrantSwatch != null) {
        item = lightVibrantSwatch;
      }
      return item;
    }

    return null;
  }

  public static Palette.Swatch getProfileDarkSwatch(Palette palette) {
    if (palette != null) {
      Palette.Swatch darkVibrantSwatch = palette.getDarkVibrantSwatch();
      Palette.Swatch darkMutedSwatch = palette.getDarkMutedSwatch();
      Palette.Swatch item = null;
      if (darkVibrantSwatch != null) {
        item = darkVibrantSwatch;
      }
      if (darkMutedSwatch != null) {
        item = darkMutedSwatch;
      }
      return item;
    }

    return null;
  }

  public static Palette.Swatch getProfileLightSwatch(Palette palette) {
    if (palette != null) {
      Palette.Swatch lightVibrantSwatch = palette.getLightVibrantSwatch();
      Palette.Swatch lightMutedSwatch = palette.getLightMutedSwatch();
      Palette.Swatch item = null;
      if (lightMutedSwatch != null) {
        item = lightMutedSwatch;
      } else if (lightVibrantSwatch != null) {
        item = lightVibrantSwatch;
      }
      return item;
    }

    return null;
  }

  public static Palette.Swatch getProfileMutedSwatch(Palette palette) {
    if (palette != null) {
      Palette.Swatch mutedSwatch = palette.getMutedSwatch();
      Palette.Swatch lightMutedSwatch = palette.getLightMutedSwatch();
      Palette.Swatch darkMutedSwatch = palette.getDarkMutedSwatch();
      Palette.Swatch item = null;
      if (lightMutedSwatch != null) {
        item = lightMutedSwatch;
      } else if (darkMutedSwatch != null) {
        item = darkMutedSwatch;
      } else if (mutedSwatch != null) {
        item = mutedSwatch;
      }
      return item;
    }

    return null;
  }

  public static Palette.Swatch getProfileVibrantSwatch(Palette palette) {
    if (palette != null) {
      Palette.Swatch vibrantSwatch = palette.getVibrantSwatch();
      Palette.Swatch lightVibrantSwatch = palette.getLightVibrantSwatch();
      Palette.Swatch darkVibrantSwatch = palette.getDarkVibrantSwatch();
      Palette.Swatch item = null;
      if (vibrantSwatch != null) {
        item = vibrantSwatch;
      } else if (darkVibrantSwatch != null) {
        item = darkVibrantSwatch;
      } else if (lightVibrantSwatch != null) {
        item = lightVibrantSwatch;
      }
      return item;
    }

    return null;
  }

  public static int foregroundColorFromBackgroundColor(int color) {
    int r = (color >> 16) & 0xFF;
    int g = (color >> 8) & 0xFF;
    int b = (color) & 0xFF;

    //@see http://stackoverflow.com/questions/12043187/how-to-check-if-hex-color-is-too-black
    double luma = 0.2126 * r + 0.7152 * g + 0.0722 * b;

    if (luma < 128) {
      return Color.rgb(255, 255, 255);
    } else {
      return Color.rgb(0, 0, 0);
    }
  }
}