1 files changed, 167 insertions, 0 deletions
diff --git a/platform/ios/UIColor+MGLAdditions.m b/platform/ios/UIColor+MGLAdditions.m
new file mode 100644
index 0000000000..ae40735d15
--- /dev/null
+++ b/platform/ios/UIColor+MGLAdditions.m
@@ -0,0 +1,167 @@
+#import "UIColor+MGLAdditions.h"
+
+/* Portions based on Erica Sadun's uicolor-utilities
+   https://github.com/erica/uicolor-utilities */
+
+@interface UIColor (MGLAdditionsPrivate)
+
++ (UIColor *)colorWithRGBHex:(UInt32)hex;
+- (CGColorSpaceModel)colorSpaceModel;
+- (BOOL)canProvideRGBComponents;
+- (BOOL)red:(CGFloat *)red green:(CGFloat *)green blue:(CGFloat *)blue alpha:(CGFloat *)alpha;
+- (UInt32)rgbHex;
+
+@end
+
+@implementation UIColor (MGLAdditions)
+
++ (UIColor *)colorWithRGBAString:(NSString *)rgbaString
+{
+    UIColor *color;
+
+    NSString *numberString = [rgbaString   stringByReplacingOccurrencesOfString:@"rgba("
+                                                                     withString:@""];
+              numberString = [numberString stringByReplacingOccurrencesOfString:@"rgb("
+                                                                     withString:@""];
+              numberString = [numberString stringByReplacingOccurrencesOfString:@")"
+                                                                     withString:@""];
+
+    NSArray *numbers = [numberString componentsSeparatedByString:@","];
+
+    if ([rgbaString hasPrefix:@"rgb("] && [numbers count] == 3)
+    {
+        color = [UIColor colorWithRed:[numbers[0] floatValue] / 255
+                                green:[numbers[1] floatValue] / 255
+                                 blue:[numbers[2] floatValue] / 255
+                                alpha:1.0];
+    }
+    else if ([rgbaString hasPrefix:@"rgba("] && [numbers count] == 4)
+    {
+        color = [UIColor colorWithRed:[numbers[0] floatValue] / 255
+                                green:[numbers[1] floatValue] / 255
+                                 blue:[numbers[2] floatValue] / 255
+                                alpha:[numbers[3] floatValue]];
+    }
+
+    return color;
+}
+
+- (NSString *)rgbaStringFromColor
+{
+    CGFloat r,g,b,a;
+
+    [self getRed:&r green:&g blue:&b alpha:&a];
+
+    r *= 255;
+    g *= 255;
+    b *= 255;
+    a *= 255;
+
+    return [NSString stringWithFormat:@"rgba(%lu,%lu,%lu,%lu)", (unsigned long)r, (unsigned long)g, (unsigned long)b, (unsigned long)a];
+}
+
++ (UIColor *)colorWithRGBHex:(UInt32)hex
+{
+	int r = (hex >> 16) & 0xFF;
+	int g = (hex >> 8) & 0xFF;
+	int b = (hex) & 0xFF;
+
+	return [UIColor colorWithRed:r / 255.0f
+						   green:g / 255.0f
+							blue:b / 255.0f
+						   alpha:1.0f];
+}
+
+- (CGColorSpaceModel)colorSpaceModel
+{
+	return CGColorSpaceGetModel(CGColorGetColorSpace(self.CGColor));
+}
+
+- (BOOL)canProvideRGBComponents
+{
+	switch (self.colorSpaceModel)
+    {
+		case kCGColorSpaceModelRGB:
+		case kCGColorSpaceModelMonochrome:
+        {
+			return YES;
+        }
+		default:
+        {
+			return NO;
+        }
+	}
+}
+
+- (BOOL)red:(CGFloat *)red green:(CGFloat *)green blue:(CGFloat *)blue alpha:(CGFloat *)alpha
+{
+	const CGFloat *components = CGColorGetComponents(self.CGColor);
+
+	CGFloat r,g,b,a;
+
+	switch (self.colorSpaceModel)
+    {
+		case kCGColorSpaceModelMonochrome:
+        {
+			r = g = b = components[0];
+			a = components[1];
+
+            break;
+        }
+		case kCGColorSpaceModelRGB:
+        {
+			r = components[0];
+			g = components[1];
+			b = components[2];
+			a = components[3];
+
+            break;
+        }
+		default:
+        {
+			return NO;
+        }
+	}
+
+	if (red)   *red   = r;
+	if (green) *green = g;
+	if (blue)  *blue  = b;
+	if (alpha) *alpha = a;
+
+	return YES;
+}
+
+- (UInt32)rgbHex
+{
+    NSAssert(self.canProvideRGBComponents, @"Must be a RGB color to use rgbHex");
+
+    CGFloat r, g, b, a;
+
+    if ( ! [self red:&r green:&g blue:&b alpha:&a])
+        return 0;
+
+    r = fminf(fmaxf(r, 0.0f), 1.0f);
+    g = fminf(fmaxf(g, 0.0f), 1.0f);
+    b = fminf(fmaxf(b, 0.0f), 1.0f);
+
+    return (((int)roundf(r * 255)) << 16) | (((int)roundf(g * 255)) << 8) | (((int)roundf(b * 255)));
+}
+
+- (NSString *)hexStringFromColor
+{
+	return [NSString stringWithFormat:@"%0.6X", (unsigned int)(self.rgbHex)];
+}
+
++ (UIColor *)colorWithHexString:(NSString *)hexString
+{
+    NSScanner *scanner = [NSScanner scannerWithString:[hexString stringByReplacingOccurrencesOfString:@"#" withString:@""]];
+
+    unsigned hexNum;
+
+    if ( ! [scanner scanHexInt:&hexNum])
+        return nil;
+
+    return [UIColor colorWithRGBHex:hexNum];
+}
+
+@end