Add Color.Resolved kitColor implementation (#115)

* FIx COpenSwiftUI compile issue

* Add CoreGraphicsContext and update CoreColor class

* Add Color.Resolved kitColor implementation

* Fix macOS selector crash issue

Author: Kyle-Ye

Sources/COpenSwiftUI/Overlay/CoreColor/CoreColor.m

@@ -1,5 +1,7 @@
 //
 //  ProtocolDescriptor.c
+//  FIXME: Use ProtocolDescriptor.m due to COpenSwiftUICore module contains ObjC symbol.
+//  Solution: Move down to COpenSwiftUICore module.
 //  COpenSwiftUI
 
 

Sources/COpenSwiftUI/ProtocolDescriptor.c renamed to Sources/COpenSwiftUI/ProtocolDescriptor.m

@@ -0,0 +1,239 @@
+//
+//  CoreColor.h
+//  COpenSwiftUI
+//  Audited for RELEASE_2024
+//  Status: Complete
+
+#include "CoreColor.h"
+
+#if OPENSWIFTUI_TARGET_OS_DARWIN
+#include "CoreGraphicsContext.h"
+
+Class CoreColorClass(BOOL isAppKitBased);
+
+#if OPENSWIFTUI_TARGET_OS_OSX
+id NSColorSpaceForCGColorSpace(CGColorSpaceRef cgColorSpace);
+Class NSColorSpaceClass(void);
+#endif
+
+BOOL CoreColorPlatformColorGetComponents(BOOL system, id color, CGFloat *red, CGFloat *green, CGFloat *blue, CGFloat *alpha) {
+    if (!color) {
+        return NO;
+    }
+    Class colorClass = CoreColorClass(system);
+    if (!colorClass) {
+        return NO;
+    }
+    #if OPENSWIFTUI_TARGET_OS_OSX
+    if (system) {
+        id colorSpace = NSColorSpaceForCGColorSpace(CGColorSpaceCreateWithName(kCGColorSpaceExtendedSRGB));
+        NSColor *nameSpaceColor = [color colorUsingColorSpace:colorSpace];
+        if (nameSpaceColor) {
+            [nameSpaceColor getRed:red green:green blue: blue alpha: alpha];
+            return YES;
+        } else {
+            return NO;
+        }
+    }
+    #endif
+    // NOTE: Fix Mac Catalyst selector type issue
+    return ((BOOL (*)(id, SEL))[color methodForSelector:@selector(getRed:green:blue:alpha:)])(color, @selector(getRed:green:blue:alpha:));
+}
+
+NSObject *CorePlatformColorForRGBA(BOOL system, CGFloat red, CGFloat green, CGFloat blue, CGFloat alpha) {
+    Class colorClass = CoreColorClass(system);
+    if (!colorClass) {
+        return nil;
+    }
+    #if OPENSWIFTUI_TARGET_OS_OSX
+    if (system) {
+        id colorSpace = NSColorSpaceForCGColorSpace(CGColorSpaceCreateWithName(kCGColorSpaceExtendedSRGB));
+        return [colorClass colorWithColorSpace:colorSpace components:(CGFloat[]){red, green, blue, alpha} count:4];
+    }
+    #endif
+    return [[colorClass alloc] initWithRed:red green:green blue:blue alpha:alpha];
+}
+
+Class CoreColorGetKitColorClass(BOOL system) {
+    CoreColorClass(system);
+}
+
+Class CoreColorClass(BOOL system) {
+    static BOOL isValid = false;
+    static Class colorClass;
+    static dispatch_once_t once;
+    dispatch_once(&once, ^{
+        if (system) {
+            Class class = NSClassFromString(@"NSColor");
+            colorClass = class;
+            isValid = class != nil;
+        } else {
+            Class class = NSClassFromString(@"UIColor");
+            colorClass = class;
+            isValid = class != nil;
+        }
+    });
+    if (isValid) {
+        return colorClass;
+    } else {
+        [NSException raise:@"Invalid core color" format:@""];
+    }
+}
+
+#if OPENSWIFTUI_TARGET_OS_OSX
+id NSColorSpaceForCGColorSpace(CGColorSpaceRef cgColorSpace) {
+    Class colorSpaceClass = NSColorSpaceClass();
+    if (colorSpaceClass) {
+        return [[colorSpaceClass alloc] initWithCGColorSpace:cgColorSpace];
+    } else {
+        return nil;
+    }
+}
+
+OPENSWIFTUI_INLINE
+Class NSColorSpaceClass(void) {
+    static Class colorSpaceClass;
+    static dispatch_once_t once;
+    dispatch_once(&once, ^{
+        colorSpaceClass = NSClassFromString(@"NSColorSpace");
+    });
+    return colorSpaceClass;
+}
+#endif
+
+@interface CoreColor () {
+    CGColorRef _color;
+}
+@end
+
+@implementation CoreColor
+
++ (NSObject *)colorWithSystem:(BOOL)system cgColor: (CGColorRef)cgColor {
+    Class colorClass = CoreColorClass(system);
+    if (colorClass) {
+        return [colorClass colorWithCGColor: cgColor];
+    } else {
+        return [[CoreColor alloc] initWithCGColor: cgColor];
+    }
+}
+
++ (NSObject *)blackColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass blackColor];
+}
+
++ (NSObject *)systemRedColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemRedColor];
+}
+
++ (NSObject *)systemOrangeColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemOrangeColor];
+}
+
++ (NSObject *)systemYellowColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemYellowColor];
+}
+
++ (NSObject *)systemGreenColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemGreenColor];
+}
+
++ (NSObject *)systemTealColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemTealColor];
+}
+
++ (NSObject *)systemMintColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemMintColor];
+}
+
++ (NSObject *)systemCyanColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemCyanColor];
+}
+
++ (NSObject *)systemBlueColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemBlueColor];
+}
+
++ (NSObject *)systemIndigoColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemIndigoColor];
+}
+
++ (NSObject *)systemPurpleColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemPurpleColor];
+}
+
++ (NSObject *)systemPinkColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemPinkColor];
+}
+
++ (NSObject *)systemBrownColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemBrownColor];
+}
+
++ (NSObject *)systemGrayColorWithSystem:(BOOL)system {
+    Class colorClass = CoreColorClass(system);
+    return [colorClass systemGrayColor];
+}
+
+- (instancetype)initWithCGColor:(CGColorRef)cgColor {
+    if (self = [super init]) {
+        _color = CGColorRetain(cgColor);
+    }
+    return self;
+}
+
+- (void)dealloc {
+    CGColorRelease(_color);
+}
+
+- (void)set {
+    CGContextRef context = CoreGraphicsContext.current.CGContext;
+    if (!context) {
+        return;
+    }
+    CGContextSetFillColorWithColor(context, self.CGColor);
+    CGContextSetStrokeColorWithColor(context, self.CGColor);
+}
+
+- (void)setFill {
+    CGContextRef context = CoreGraphicsContext.current.CGContext;
+    if (!context) {
+        return;
+    }
+    CGContextSetFillColorWithColor(context, self.CGColor);
+}
+
+- (void)setStroke {
+    CGContextRef context = CoreGraphicsContext.current.CGContext;
+    if (!context) {
+        return;
+    }
+    CGContextSetStrokeColorWithColor(context, self.CGColor);
+}
+
+- (CGColorRef)CGColor {
+    return _color;
+}
+
+- (CoreColor *)colorWithAlphaComponent:(CGFloat)alpha {
+    CGColorRef newColor = CGColorCreateCopyWithAlpha(_color, alpha);
+    CoreColor *color = [[CoreColor alloc] initWithCGColor:newColor];
+    CGColorRelease(newColor);
+    return color;
+}
+
+@end
+
+#endif