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Add macOS-specific semantic colors support (RCTPlatformColorUtils)
Co-authored-by: Saadnajmi <6722175+Saadnajmi@users.noreply.github.com>
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‎packages/react-native/ReactCommon/react/renderer/graphics/platform/macos/react/renderer/graphics/RCTPlatformColorUtils.mm‎

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/*
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* Copyright (c) Microsoft Corporation.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// [macOS]
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#import "RCTPlatformColorUtils.h"
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#import <Foundation/Foundation.h>
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#import <React/RCTUIKit.h>
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#import <react/renderer/graphics/HostPlatformColor.h>
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#import <react/utils/ManagedObjectWrapper.h>
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#include <string>
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NS_ASSUME_NONNULL_BEGIN
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static NSString *const kColorSuffix = @"Color";
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static NSString *const kFallbackARGBKey = @"fallback-argb";
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static NSString *const kFallbackKey = @"fallback";
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static NSString *const kSelectorKey = @"selector";
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static NSString *const kIndexKey = @"index";
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static NSDictionary<NSString *, NSDictionary *> *_PlatformColorSelectorsDict()
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{
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static NSDictionary<NSString *, NSDictionary *> *dict;
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static dispatch_once_t once_token;
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dispatch_once(&once_token, ^(void) {
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NSMutableDictionary<NSString *, NSDictionary *> *map = [@{
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// https://developer.apple.com/documentation/appkit/nscolor/ui_element_colors
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// Label Colors
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@"labelColor": @{}, // 10_10
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@"secondaryLabelColor": @{}, // 10_10
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@"tertiaryLabelColor": @{}, // 10_10
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@"quaternaryLabelColor": @{}, // 10_10
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// Text Colors
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@"textColor": @{},
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@"placeholderTextColor": @{}, // 10_10
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@"selectedTextColor": @{},
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@"textBackgroundColor": @{},
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@"selectedTextBackgroundColor": @{},
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@"keyboardFocusIndicatorColor": @{},
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@"unemphasizedSelectedTextColor": @{ // 10_14
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kFallbackKey: @"selectedTextColor"
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},
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@"unemphasizedSelectedTextBackgroundColor": @{ // 10_14
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kFallbackKey: @"textBackgroundColor"
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},
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// Content Colors
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@"linkColor": @{}, // 10_10
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@"separatorColor": @{ // 10_14
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kFallbackKey: @"gridColor"
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},
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@"selectedContentBackgroundColor": @{ // 10_14
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kFallbackKey: @"alternateSelectedControlColor"
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},
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@"unemphasizedSelectedContentBackgroundColor": @{ // 10_14
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kFallbackKey: @"secondarySelectedControlColor"
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},
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// Menu Colors
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@"selectedMenuItemTextColor": @{},
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// Table Colors
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@"gridColor": @{},
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@"headerTextColor": @{},
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@"alternatingEvenContentBackgroundColor": @{ // 10_14
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kSelectorKey: @"alternatingContentBackgroundColors",
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kIndexKey: @0,
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kFallbackKey: @"controlAlternatingRowBackgroundColors"
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},
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@"alternatingOddContentBackgroundColor": @{ // 10_14
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kSelectorKey: @"alternatingContentBackgroundColors",
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kIndexKey: @1,
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kFallbackKey: @"controlAlternatingRowBackgroundColors"
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},
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// Control Colors
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@"controlAccentColor": @{ // 10_14
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kFallbackKey: @"controlColor"
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},
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@"controlColor": @{},
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@"controlBackgroundColor": @{},
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@"controlTextColor": @{},
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@"disabledControlTextColor": @{},
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@"selectedControlColor": @{},
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@"selectedControlTextColor": @{},
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@"alternateSelectedControlTextColor": @{},
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@"scrubberTexturedBackgroundColor": @{}, // 10_12_2
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// Window Colors
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@"windowBackgroundColor": @{},
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@"windowFrameTextColor": @{},
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@"underPageBackgroundColor": @{}, // 10_8
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// Highlights and Shadows
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@"findHighlightColor": @{ // 10_13
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kFallbackKey: @"highlightColor"
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},
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@"highlightColor": @{},
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@"shadowColor": @{},
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// https://developer.apple.com/documentation/appkit/nscolor/standard_colors
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// Standard Colors
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@"systemBlueColor": @{}, // 10_10
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@"systemBrownColor": @{}, // 10_10
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@"systemGrayColor": @{}, // 10_10
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@"systemGreenColor": @{}, // 10_10
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@"systemOrangeColor": @{}, // 10_10
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@"systemPinkColor": @{}, // 10_10
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@"systemPurpleColor": @{}, // 10_10
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@"systemRedColor": @{}, // 10_10
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@"systemYellowColor": @{}, // 10_10
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// Transparent Color
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@"clearColor" : @{},
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} mutableCopy];
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// Create aliases for Swift-style names (without "Color" suffix)
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NSMutableDictionary<NSString *, NSDictionary *> *aliases = [NSMutableDictionary new];
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for (NSString *objcSelector in map) {
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NSMutableDictionary *entry = [map[objcSelector] mutableCopy];
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if ([entry objectForKey:kSelectorKey] == nil) {
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entry[kSelectorKey] = objcSelector;
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}
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if ([objcSelector hasSuffix:kColorSuffix]) {
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NSString *swiftSelector = [objcSelector substringToIndex:[objcSelector length] - [kColorSuffix length]];
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aliases[swiftSelector] = entry;
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}
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}
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[map addEntriesFromDictionary:aliases];
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dict = [map copy];
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});
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return dict;
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}
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static RCTUIColor *_UIColorFromHexValue(NSNumber *hexValue)
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{
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NSUInteger hexIntValue = [hexValue unsignedIntegerValue];
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CGFloat red = ((CGFloat)((hexIntValue & 0xFF000000) >> 24)) / 255.0;
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CGFloat green = ((CGFloat)((hexIntValue & 0xFF0000) >> 16)) / 255.0;
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CGFloat blue = ((CGFloat)((hexIntValue & 0xFF00) >> 8)) / 255.0;
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CGFloat alpha = ((CGFloat)(hexIntValue & 0xFF)) / 255.0;
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return [RCTUIColor colorWithRed:red green:green blue:blue alpha:alpha];
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}
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static RCTUIColor *_Nullable _UIColorFromSemanticString(NSString *semanticString)
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{
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NSString *platformColorString = [semanticString hasSuffix:kColorSuffix]
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? [semanticString substringToIndex:[semanticString length] - [kColorSuffix length]]
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: semanticString;
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NSDictionary<NSString *, NSDictionary *> *platformColorSelectorsDict = _PlatformColorSelectorsDict();
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NSDictionary<NSString *, id> *colorInfo = platformColorSelectorsDict[platformColorString];
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if (colorInfo) {
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// Get the selector name, defaulting to the platform color string
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NSString *selectorName = colorInfo[kSelectorKey];
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if (selectorName == nil) {
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selectorName = [platformColorString stringByAppendingString:kColorSuffix];
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}
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SEL objcColorSelector = NSSelectorFromString(selectorName);
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if (![RCTUIColor respondsToSelector:objcColorSelector]) {
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// Try fallback ARGB value
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NSNumber *fallbackRGB = colorInfo[kFallbackARGBKey];
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if (fallbackRGB) {
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return _UIColorFromHexValue(fallbackRGB);
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}
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// Try fallback color name
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NSString *fallbackColorName = colorInfo[kFallbackKey];
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if (fallbackColorName) {
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return _UIColorFromSemanticString(fallbackColorName);
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}
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} else {
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Class colorClass = [RCTUIColor class];
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IMP imp = [colorClass methodForSelector:objcColorSelector];
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id (*getColor)(id, SEL) = ((id(*)(id, SEL))imp);
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id colorObject = getColor(colorClass, objcColorSelector);
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// Handle array results (like alternatingContentBackgroundColors)
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if ([colorObject isKindOfClass:[NSArray class]]) {
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NSNumber *index = colorInfo[kIndexKey];
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if (index != nil) {
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NSArray *colors = colorObject;
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NSUInteger idx = [index unsignedIntegerValue];
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if (idx < colors.count) {
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colorObject = colors[idx];
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}
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}
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}
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if ([colorObject isKindOfClass:[RCTUIColor class]]) {
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return colorObject;
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}
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}
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}
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return nil;
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}
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static inline NSString *_NSStringFromCString(
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const std::string &string,
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const NSStringEncoding &encoding = NSUTF8StringEncoding)
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{
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return [NSString stringWithCString:string.c_str() encoding:encoding];
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}
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static inline facebook::react::ColorComponents _ColorComponentsFromUIColor(RCTUIColor *color)
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{
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CGFloat rgba[4];
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color = [color colorUsingColorSpace:[NSColorSpace genericRGBColorSpace]];
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[color getRed:&rgba[0] green:&rgba[1] blue:&rgba[2] alpha:&rgba[3]];
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return {(float)rgba[0], (float)rgba[1], (float)rgba[2], (float)rgba[3]};
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}
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facebook::react::ColorComponents RCTPlatformColorComponentsFromSemanticItems(std::vector<std::string> &semanticItems)
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{
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return _ColorComponentsFromUIColor(RCTPlatformColorFromSemanticItems(semanticItems));
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}
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RCTUIColor *RCTPlatformColorFromSemanticItems(std::vector<std::string> &semanticItems)
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{
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for (const auto &semanticCString : semanticItems) {
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NSString *semanticNSString = _NSStringFromCString(semanticCString);
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RCTUIColor *uiColor = [RCTUIColor colorNamed:semanticNSString];
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if (uiColor != nil) {
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return uiColor;
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}
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uiColor = _UIColorFromSemanticString(semanticNSString);
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if (uiColor != nil) {
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return uiColor;
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}
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}
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return RCTUIColor.clearColor;
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}
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RCTUIColor *RCTPlatformColorFromColor(const facebook::react::Color &color)
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{
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return (RCTUIColor *)facebook::react::unwrapManagedObject(color.getUIColor());
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}
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NS_ASSUME_NONNULL_END

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