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DTColor+HTML.m
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DTColor+HTML.m
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//
// DTColor+HTML.m
// DTCoreText
//
// Created by Oliver Drobnik on 1/9/11.
// Copyright 2011 Drobnik.com. All rights reserved.
//
#import "DTColor+HTML.h"
#import "NSString+HTML.h"
static NSDictionary *colorLookup = nil;
#if TARGET_OS_IPHONE
@implementation UIColor (HTML)
+ (UIColor *)colorWithHexString:(NSString *)hex
{
if ([hex length]!=6 && [hex length]!=3)
{
return nil;
}
NSUInteger digits = [hex length]/3;
CGFloat maxValue = (digits==1)?15.0:255.0;
CGFloat red = [[hex substringWithRange:NSMakeRange(0, digits)] integerValueFromHex]/maxValue;
CGFloat green = [[hex substringWithRange:NSMakeRange(digits, digits)] integerValueFromHex]/maxValue;
CGFloat blue = [[hex substringWithRange:NSMakeRange(2*digits, digits)] integerValueFromHex]/maxValue;
return [UIColor colorWithRed:red green:green blue:blue alpha:1.0];
}
// Source: http://www.w3schools.com/html/html_colornames.asp
+ (UIColor *)colorWithHTMLName:(NSString *)name
{
if ([name hasPrefix:@"#"])
{
return [UIColor colorWithHexString:[name substringFromIndex:1]];
}
if ([name hasPrefix:@"rgba"]) {
NSString *rgbaName = [name stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"rgba() "]];
NSArray *rgba = [rgbaName componentsSeparatedByString:@","];
if ([rgba count] != 4) {
// Incorrect syntax
return nil;
}
return [UIColor colorWithRed:[[rgba objectAtIndex:0] floatValue] / 255
green:[[rgba objectAtIndex:1] floatValue] / 255
blue:[[rgba objectAtIndex:2] floatValue] / 255
alpha:[[rgba objectAtIndex:3] floatValue]];
}
if([name hasPrefix:@"rgb"])
{
NSString * rgbName = [name stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"rbg() "]];
NSArray* rbg = [rgbName componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@","]];
if ([rbg count] != 3) {
// Incorrect syntax
return nil;
}
return [UIColor colorWithRed:[[rbg objectAtIndex:0]floatValue]/255
green:[[rbg objectAtIndex:1]floatValue] /255
blue:[[rbg objectAtIndex:2]floatValue] /255
alpha:1.0];
}
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
colorLookup = [[NSDictionary alloc] initWithObjectsAndKeys:
@"F0F8FF", @"aliceblue",
@"FAEBD7", @"antiquewhite",
@"00FFFF", @"aqua",
@"7FFFD4", @"aquamarine",
@"F0FFFF", @"azure",
@"F5F5DC", @"beige",
@"FFE4C4", @"bisque",
@"000000", @"black",
@"FFEBCD", @"blanchedalmond",
@"0000FF", @"blue",
@"8A2BE2", @"blueviolet",
@"A52A2A", @"brown",
@"DEB887", @"burlywood",
@"5F9EA0", @"cadetblue",
@"7FFF00", @"chartreuse",
@"D2691E", @"chocolate",
@"FF7F50", @"coral",
@"6495ED", @"cornflowerblue",
@"FFF8DC", @"cornsilk",
@"DC143C", @"crimson",
@"00FFFF", @"cyan",
@"00008B", @"darkblue",
@"008B8B", @"darkcyan",
@"B8860B", @"darkgoldenrod",
@"A9A9A9", @"darkgray",
@"A9A9A9", @"darkgrey",
@"006400", @"darkgreen",
@"BDB76B", @"darkkhaki",
@"8B008B", @"darkmagenta",
@"556B2F", @"darkolivegreen",
@"FF8C00", @"darkorange",
@"9932CC", @"darkorchid",
@"8B0000", @"darkred",
@"E9967A", @"darksalmon",
@"8FBC8F", @"darkseagreen",
@"483D8B", @"darkslateblue",
@"2F4F4F", @"darkslategray",
@"2F4F4F", @"darkslategrey",
@"00CED1", @"darkturquoise",
@"9400D3", @"darkviolet",
@"FF1493", @"deeppink",
@"00BFFF", @"deepskyblue",
@"696969", @"dimgray",
@"696969", @"dimgrey",
@"1E90FF", @"dodgerblue",
@"B22222", @"firebrick",
@"FFFAF0", @"floralwhite",
@"228B22", @"forestgreen",
@"FF00FF", @"fuchsia",
@"DCDCDC", @"gainsboro",
@"F8F8FF", @"ghostwhite",
@"FFD700", @"gold",
@"DAA520", @"goldenrod",
@"808080", @"gray",
@"808080", @"grey",
@"008000", @"green",
@"ADFF2F", @"greenyellow",
@"F0FFF0", @"honeydew",
@"FF69B4", @"hotpink",
@"CD5C5C", @"indianred",
@"4B0082", @"indigo",
@"FFFFF0", @"ivory",
@"F0E68C", @"khaki",
@"E6E6FA", @"lavender",
@"FFF0F5", @"lavenderblush",
@"7CFC00", @"lawngreen",
@"FFFACD", @"lemonchiffon",
@"ADD8E6", @"lightblue",
@"F08080", @"lightcoral",
@"E0FFFF", @"lightcyan",
@"FAFAD2", @"lightgoldenrodyellow",
@"D3D3D3", @"lightgray",
@"D3D3D3", @"lightgrey",
@"90EE90", @"lightgreen",
@"FFB6C1", @"lightpink",
@"FFA07A", @"lightsalmon",
@"20B2AA", @"lightseagreen",
@"87CEFA", @"lightskyblue",
@"778899", @"lightslategray",
@"778899", @"lightslategrey",
@"B0C4DE", @"lightsteelblue",
@"FFFFE0", @"lightyellow",
@"00FF00", @"lime",
@"32CD32", @"limegreen",
@"FAF0E6", @"linen",
@"FF00FF", @"magenta",
@"800000", @"maroon",
@"66CDAA", @"mediumaquamarine",
@"0000CD", @"mediumblue",
@"BA55D3", @"mediumorchid",
@"9370D8", @"mediumpurple",
@"3CB371", @"mediumseagreen",
@"7B68EE", @"mediumslateblue",
@"00FA9A", @"mediumspringgreen",
@"48D1CC", @"mediumturquoise",
@"C71585", @"mediumvioletred",
@"191970", @"midnightblue",
@"F5FFFA", @"mintcream",
@"FFE4E1", @"mistyrose",
@"FFE4B5", @"moccasin",
@"FFDEAD", @"navajowhite",
@"000080", @"navy",
@"FDF5E6", @"oldlace",
@"808000", @"olive",
@"6B8E23", @"olivedrab",
@"FFA500", @"orange",
@"FF4500", @"orangered",
@"DA70D6", @"orchid",
@"EEE8AA", @"palegoldenrod",
@"98FB98", @"palegreen",
@"AFEEEE", @"paleturquoise",
@"D87093", @"palevioletred",
@"FFEFD5", @"papayawhip",
@"FFDAB9", @"peachpuff",
@"CD853F", @"peru",
@"FFC0CB", @"pink",
@"DDA0DD", @"plum",
@"B0E0E6", @"powderblue",
@"800080", @"purple",
@"FF0000", @"red",
@"BC8F8F", @"rosybrown",
@"4169E1", @"royalblue",
@"8B4513", @"saddlebrown",
@"FA8072", @"salmon",
@"F4A460", @"sandybrown",
@"2E8B57", @"seagreen",
@"FFF5EE", @"seashell",
@"A0522D", @"sienna",
@"C0C0C0", @"silver",
@"87CEEB", @"skyblue",
@"6A5ACD", @"slateblue",
@"708090", @"slategray",
@"708090", @"slategrey",
@"FFFAFA", @"snow",
@"00FF7F", @"springgreen",
@"4682B4", @"steelblue",
@"D2B48C", @"tan",
@"008080", @"teal",
@"D8BFD8", @"thistle",
@"FF6347", @"tomato",
@"40E0D0", @"turquoise",
@"EE82EE", @"violet",
@"F5DEB3", @"wheat",
@"FFFFFF", @"white",
@"F5F5F5", @"whitesmoke",
@"FFFF00", @"yellow",
@"9ACD32", @"yellowgreen",
nil];
});
NSString *hexString = [colorLookup objectForKey:[name lowercaseString]];
return [UIColor colorWithHexString:hexString];
}
- (NSString *)htmlHexString
{
CGColorRef color = self.CGColor;
size_t count = CGColorGetNumberOfComponents(color);
const CGFloat *components = CGColorGetComponents(color);
static NSString *stringFormat = @"%02x%02x%02x";
// Grayscale
if (count == 2)
{
NSUInteger white = (NSUInteger)(components[0] * (CGFloat)255);
return [NSString stringWithFormat:stringFormat, white, white, white];
}
// RGB
else if (count == 4)
{
return [NSString stringWithFormat:stringFormat, (NSUInteger)(components[0] * (CGFloat)255),
(NSUInteger)(components[1] * (CGFloat)255), (NSUInteger)(components[2] * (CGFloat)255)];
}
// Unsupported color space
return nil;
}
- (CGFloat)alphaComponent
{
return CGColorGetAlpha(self.CGColor);
}
@end
#else
@implementation NSColor (HTML)
+ (NSColor *)colorWithHexString:(NSString *)hex
{
if ([hex length]!=6 && [hex length]!=3)
{
return nil;
}
NSUInteger digits = [hex length]/3;
CGFloat maxValue = (digits==1)?15.0:255.0;
CGFloat red = [[hex substringWithRange:NSMakeRange(0, digits)] integerValueFromHex]/maxValue;
CGFloat green = [[hex substringWithRange:NSMakeRange(digits, digits)] integerValueFromHex]/maxValue;
CGFloat blue = [[hex substringWithRange:NSMakeRange(2*digits, digits)] integerValueFromHex]/maxValue;
return [NSColor colorWithDeviceRed:red green:green blue:blue alpha:1.0];
}
// Source: http://www.w3schools.com/html/html_colornames.asp
+ (NSColor *)colorWithHTMLName:(NSString *)name
{
if ([name hasPrefix:@"#"])
{
return [NSColor colorWithHexString:[name substringFromIndex:1]];
}
if ([name hasPrefix:@"rgba"]) {
NSString *rgbaName = [name stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"rgba() "]];
NSArray *rgba = [rgbaName componentsSeparatedByString:@","];
if ([rgba count] != 4) {
// Incorrect syntax
return nil;
}
return [NSColor colorWithDeviceRed:[[rgba objectAtIndex:0] floatValue] / 255
green:[[rgba objectAtIndex:1] floatValue] / 255
blue:[[rgba objectAtIndex:2] floatValue] / 255
alpha:[[rgba objectAtIndex:3] floatValue]];
}
if([name hasPrefix:@"rgb"])
{
NSString * rgbName = [name stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"rbg() "]];
NSArray* rbg = [rgbName componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@","]];
if ([rbg count] != 3) {
// Incorrect syntax
return nil;
}
return [NSColor colorWithDeviceRed:[[rbg objectAtIndex:0]floatValue]/255
green:[[rbg objectAtIndex:1]floatValue] /255
blue:[[rbg objectAtIndex:2]floatValue] /255
alpha:1.0];
}
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
colorLookup = [[NSDictionary alloc] initWithObjectsAndKeys:
@"F0F8FF", @"aliceblue",
@"FAEBD7", @"antiquewhite",
@"00FFFF", @"aqua",
@"7FFFD4", @"aquamarine",
@"F0FFFF", @"azure",
@"F5F5DC", @"beige",
@"FFE4C4", @"bisque",
@"000000", @"black",
@"FFEBCD", @"blanchedalmond",
@"0000FF", @"blue",
@"8A2BE2", @"blueviolet",
@"A52A2A", @"brown",
@"DEB887", @"burlywood",
@"5F9EA0", @"cadetblue",
@"7FFF00", @"chartreuse",
@"D2691E", @"chocolate",
@"FF7F50", @"coral",
@"6495ED", @"cornflowerblue",
@"FFF8DC", @"cornsilk",
@"DC143C", @"crimson",
@"00FFFF", @"cyan",
@"00008B", @"darkblue",
@"008B8B", @"darkcyan",
@"B8860B", @"darkgoldenrod",
@"A9A9A9", @"darkgray",
@"A9A9A9", @"darkgrey",
@"006400", @"darkgreen",
@"BDB76B", @"darkkhaki",
@"8B008B", @"darkmagenta",
@"556B2F", @"darkolivegreen",
@"FF8C00", @"darkorange",
@"9932CC", @"darkorchid",
@"8B0000", @"darkred",
@"E9967A", @"darksalmon",
@"8FBC8F", @"darkseagreen",
@"483D8B", @"darkslateblue",
@"2F4F4F", @"darkslategray",
@"2F4F4F", @"darkslategrey",
@"00CED1", @"darkturquoise",
@"9400D3", @"darkviolet",
@"FF1493", @"deeppink",
@"00BFFF", @"deepskyblue",
@"696969", @"dimgray",
@"696969", @"dimgrey",
@"1E90FF", @"dodgerblue",
@"B22222", @"firebrick",
@"FFFAF0", @"floralwhite",
@"228B22", @"forestgreen",
@"FF00FF", @"fuchsia",
@"DCDCDC", @"gainsboro",
@"F8F8FF", @"ghostwhite",
@"FFD700", @"gold",
@"DAA520", @"goldenrod",
@"808080", @"gray",
@"808080", @"grey",
@"008000", @"green",
@"ADFF2F", @"greenyellow",
@"F0FFF0", @"honeydew",
@"FF69B4", @"hotpink",
@"CD5C5C", @"indianred",
@"4B0082", @"indigo",
@"FFFFF0", @"ivory",
@"F0E68C", @"khaki",
@"E6E6FA", @"lavender",
@"FFF0F5", @"lavenderblush",
@"7CFC00", @"lawngreen",
@"FFFACD", @"lemonchiffon",
@"ADD8E6", @"lightblue",
@"F08080", @"lightcoral",
@"E0FFFF", @"lightcyan",
@"FAFAD2", @"lightgoldenrodyellow",
@"D3D3D3", @"lightgray",
@"D3D3D3", @"lightgrey",
@"90EE90", @"lightgreen",
@"FFB6C1", @"lightpink",
@"FFA07A", @"lightsalmon",
@"20B2AA", @"lightseagreen",
@"87CEFA", @"lightskyblue",
@"778899", @"lightslategray",
@"778899", @"lightslategrey",
@"B0C4DE", @"lightsteelblue",
@"FFFFE0", @"lightyellow",
@"00FF00", @"lime",
@"32CD32", @"limegreen",
@"FAF0E6", @"linen",
@"FF00FF", @"magenta",
@"800000", @"maroon",
@"66CDAA", @"mediumaquamarine",
@"0000CD", @"mediumblue",
@"BA55D3", @"mediumorchid",
@"9370D8", @"mediumpurple",
@"3CB371", @"mediumseagreen",
@"7B68EE", @"mediumslateblue",
@"00FA9A", @"mediumspringgreen",
@"48D1CC", @"mediumturquoise",
@"C71585", @"mediumvioletred",
@"191970", @"midnightblue",
@"F5FFFA", @"mintcream",
@"FFE4E1", @"mistyrose",
@"FFE4B5", @"moccasin",
@"FFDEAD", @"navajowhite",
@"000080", @"navy",
@"FDF5E6", @"oldlace",
@"808000", @"olive",
@"6B8E23", @"olivedrab",
@"FFA500", @"orange",
@"FF4500", @"orangered",
@"DA70D6", @"orchid",
@"EEE8AA", @"palegoldenrod",
@"98FB98", @"palegreen",
@"AFEEEE", @"paleturquoise",
@"D87093", @"palevioletred",
@"FFEFD5", @"papayawhip",
@"FFDAB9", @"peachpuff",
@"CD853F", @"peru",
@"FFC0CB", @"pink",
@"DDA0DD", @"plum",
@"B0E0E6", @"powderblue",
@"800080", @"purple",
@"FF0000", @"red",
@"BC8F8F", @"rosybrown",
@"4169E1", @"royalblue",
@"8B4513", @"saddlebrown",
@"FA8072", @"salmon",
@"F4A460", @"sandybrown",
@"2E8B57", @"seagreen",
@"FFF5EE", @"seashell",
@"A0522D", @"sienna",
@"C0C0C0", @"silver",
@"87CEEB", @"skyblue",
@"6A5ACD", @"slateblue",
@"708090", @"slategray",
@"708090", @"slategrey",
@"FFFAFA", @"snow",
@"00FF7F", @"springgreen",
@"4682B4", @"steelblue",
@"D2B48C", @"tan",
@"008080", @"teal",
@"D8BFD8", @"thistle",
@"FF6347", @"tomato",
@"40E0D0", @"turquoise",
@"EE82EE", @"violet",
@"F5DEB3", @"wheat",
@"FFFFFF", @"white",
@"F5F5F5", @"whitesmoke",
@"FFFF00", @"yellow",
@"9ACD32", @"yellowgreen",
nil];
});
NSString *hexString = [colorLookup objectForKey:[name lowercaseString]];
return [NSColor colorWithHexString:hexString];
}
- (NSString *)htmlHexString
{
CGFloat red = self.redComponent;
CGFloat blue = self.blueComponent;
CGFloat green = self.greenComponent;
static NSString *stringFormat = @"%02x%02x%02x";
return [NSString stringWithFormat:stringFormat, (NSUInteger)(red * (CGFloat)255),
(NSUInteger)(green * (CGFloat)255), (NSUInteger)(blue * (CGFloat)255)];
}
#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_7
+ (NSColor *)colorWithCGColor:(CGColorRef)cgColor
{
size_t count = CGColorGetNumberOfComponents(cgColor);
const CGFloat *components = CGColorGetComponents(cgColor);
// Grayscale
if (count == 2)
{
return [NSColor colorWithDeviceWhite:components[0] alpha:components[1]];
}
// RGB
else if (count == 4)
{
return [NSColor colorWithDeviceRed:components[0] green:components[1] blue:components[2] alpha:components[3]];
}
// neigher grayscale nor rgba
return nil;
}
// From https://gist.github.com/1593255
- (CGColorRef)CGColor
{
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
NSColor *selfCopy = [self colorUsingColorSpaceName:NSDeviceRGBColorSpace];
CGFloat colorValues[4];
[selfCopy getRed:&colorValues[0] green:&colorValues[1] blue:&colorValues[2] alpha:&colorValues[3]];
CGColorRef color = CGColorCreate(colorSpace, colorValues);
CGColorSpaceRelease(colorSpace);
return color;
}
#endif
@end
#endif