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start work to allow custom accent colors

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This commit is contained in:
RaidMax
2019-07-27 08:18:49 -05:00
parent ab4ce41015
commit 3b9b99a07e
20 changed files with 499 additions and 285 deletions
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90
WebfrontCore/Middleware/CustomCssAccentMiddlewareAction.cs Normal file
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using SharedLibraryCore.Interfaces;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Globalization;
using System.Linq;
using System.Threading.Tasks;
namespace WebfrontCore.Middleware
{
public class CustomCssAccentMiddlewareAction : IMiddlewareAction<string>
{
private readonly Color _primaryColor;
private readonly Color _secondaryColor;
private readonly Color _originalPrimaryColor;
private readonly Color _originalSecondaryColor;
public CustomCssAccentMiddlewareAction(string originalPrimaryColor, string originalSecondaryColor, string primaryColor, string secondaryColor)
{
_originalPrimaryColor = Color.FromArgb(Convert.ToInt32(originalPrimaryColor.Substring(1).ToString(), 16));
_originalSecondaryColor = Color.FromArgb(Convert.ToInt32(originalSecondaryColor.Substring(1).ToString(), 16));
_primaryColor = string.IsNullOrEmpty(primaryColor) ? _originalPrimaryColor : Color.FromArgb(Convert.ToInt32(primaryColor.Substring(1).ToString(), 16));
_secondaryColor = string.IsNullOrEmpty(secondaryColor) ? _originalSecondaryColor : Color.FromArgb(Convert.ToInt32(secondaryColor.Substring(1).ToString(), 16));
}
public async Task<string> Invoke(string original)
{
string originalPrimaryHex = ColorToHex(_originalPrimaryColor);
string originalPrimaryDec = ColorToDec(_originalPrimaryColor);
string originalSecondaryHex = ColorToHex(_originalSecondaryColor);
string originalSecondaryDec = ColorToDec(_originalSecondaryColor);
string primaryHex = ColorToHex(_primaryColor);
string primaryDec = ColorToDec(_primaryColor);
string secondaryHex = ColorToHex(_secondaryColor);
string secondaryDec = ColorToDec(_secondaryColor);
string originalPrimaryDarkenHex = ColorToHex(LightenDarkenColor(_originalPrimaryColor, -10));
string originalPrimaryDarkenDec = ColorToDec(LightenDarkenColor(_originalPrimaryColor, -10));
string originalSecondaryDarkenHex = ColorToHex(LightenDarkenColor(_originalSecondaryColor, -10));
string originalSecondaryDarkenDec = ColorToDec(LightenDarkenColor(_originalSecondaryColor, -10));
string primaryDarkenHex = ColorToHex(LightenDarkenColor(_primaryColor, -10));
string primaryDarkenDec = ColorToDec(LightenDarkenColor(_primaryColor, -10));
string secondaryDarkenHex = ColorToHex(LightenDarkenColor(_secondaryColor, -10));
string secondaryDarkenDec = ColorToDec(LightenDarkenColor(_secondaryColor, -10));
return original
.Replace(originalPrimaryHex, primaryHex, StringComparison.OrdinalIgnoreCase)
.Replace(originalPrimaryDec, primaryDec, StringComparison.OrdinalIgnoreCase)
.Replace(originalSecondaryHex, secondaryHex, StringComparison.OrdinalIgnoreCase)
.Replace(originalSecondaryDec, secondaryDec, StringComparison.OrdinalIgnoreCase)
.Replace(originalPrimaryDarkenHex, primaryDarkenHex, StringComparison.OrdinalIgnoreCase)
.Replace(originalPrimaryDarkenDec, primaryDarkenDec, StringComparison.OrdinalIgnoreCase)
.Replace(originalSecondaryDarkenHex, secondaryDarkenHex, StringComparison.OrdinalIgnoreCase)
.Replace(originalSecondaryDarkenDec, secondaryDarkenDec, StringComparison.OrdinalIgnoreCase);
}
private string ColorToHex(Color color) => $"#{color.R.ToString("X2")}{color.G.ToString("X2")}{color.B.ToString("X2")}";
private string ColorToDec(Color color) => $"{(int)color.R}, {(int)color.G}, {(int)color.B}";
/// <summary>
/// Adapted from https://css-tricks.com/snippets/javascript/lighten-darken-color/
/// </summary>
/// <param name="col"></param>
/// <param name="amt"></param>
/// <returns></returns>
private Color LightenDarkenColor(Color col, float amt)
{
var num = col.ToArgb();
int r = (num >> 16) + (int)(amt * (num >> 16));
if (r > 255) r = 255;
else if (r < 0) r = 0;
int g = ((num >> 8) & 0x00FF) + (int)(amt * ((num >> 8) & 0x00FF));
if (g > 255) g = 255;
else if (g < 0) g = 0;
int b = (num & 0x0000FF) + (int)(amt * (num & 0x0000FF));
if (b > 255) b = 255;
else if (b < 0) b = 0;
return Color.FromArgb(r, g, b);
}
}
}