feat: expose systemPreferences.getSystemColor() (#16248)

atom/browser/api/atom_api_system_preferences.cc

@@ -91,6 +91,7 @@ void SystemPreferences::BuildPrototype(
                  &SystemPreferences::GetAppLevelAppearance)
       .SetMethod("setAppLevelAppearance",
                  &SystemPreferences::SetAppLevelAppearance)
+      .SetMethod("getSystemColor", &SystemPreferences::GetSystemColor)
       .SetMethod("isTrustedAccessibilityClient",
                  &SystemPreferences::IsTrustedAccessibilityClient)
       .SetMethod("getMediaAccessStatus",

atom/browser/api/atom_api_system_preferences.h

@@ -95,6 +95,8 @@ class SystemPreferences : public mate::EventEmitter<SystemPreferences>
   void RemoveUserDefault(const std::string& name);
   bool IsSwipeTrackingFromScrollEventsEnabled();
 
+  std::string GetSystemColor(const std::string& color, mate::Arguments* args);
+
   bool IsTrustedAccessibilityClient(bool prompt);
 
   // TODO(codebytere): Write tests for these methods once we

atom/browser/api/atom_api_system_preferences_mac.mm

@@ -105,7 +105,7 @@ std::string ConvertAuthorizationStatus(AVAuthorizationStatusMac status) {
   }
 }
 
-// Convert color to RGBA value like "#ABCDEF"
+// Convert color to RGBA value like "aabbccdd"
 std::string ToRGBA(NSColor* color) {
   return base::StringPrintf(
       "%02X%02X%02X%02X", (int)(color.redComponent * 0xFF),
@@ -113,6 +113,13 @@ std::string ToRGBA(NSColor* color) {
       (int)(color.alphaComponent * 0xFF));
 }
 
+// Convert color to RGB hex value like "#ABCDEF"
+std::string ToRGBHex(NSColor* color) {
+  return base::StringPrintf("#%02X%02X%02X", (int)(color.redComponent * 0xFF),
+                            (int)(color.greenComponent * 0xFF),
+                            (int)(color.blueComponent * 0xFF));
+}
+
 }  // namespace
 
 void SystemPreferences::PostNotification(const std::string& name,
@@ -395,6 +402,41 @@ std::string SystemPreferences::GetAccentColor() {
   return ToRGBA(sysColor);
 }
 
+std::string SystemPreferences::GetSystemColor(const std::string& color,
+                                              mate::Arguments* args) {
+  if (@available(macOS 10.10, *)) {
+    NSColor* sysColor;
+    if (color == "blue") {
+      sysColor = [NSColor systemBlueColor];
+    } else if (color == "brown") {
+      sysColor = [NSColor systemBrownColor];
+    } else if (color == "gray") {
+      sysColor = [NSColor systemGrayColor];
+    } else if (color == "green") {
+      sysColor = [NSColor systemGreenColor];
+    } else if (color == "orange") {
+      sysColor = [NSColor systemOrangeColor];
+    } else if (color == "pink") {
+      sysColor = [NSColor systemPinkColor];
+    } else if (color == "purple") {
+      sysColor = [NSColor systemPurpleColor];
+    } else if (color == "red") {
+      sysColor = [NSColor systemRedColor];
+    } else if (color == "yellow") {
+      sysColor = [NSColor systemYellowColor];
+    } else {
+      args->ThrowError("Unknown system color: " + color);
+      return "";
+    }
+
+    return ToRGBHex(sysColor);
+  } else {
+    args->ThrowError(
+        "This api is not available on MacOS version 10.9 or lower.");
+    return "";
+  }
+}
+
 bool SystemPreferences::IsTrustedAccessibilityClient(bool prompt) {
   NSDictionary* options = @{(id)kAXTrustedCheckOptionPrompt : @(prompt)};
   return AXIsProcessTrustedWithOptions((CFDictionaryRef)options);

atom/browser/mac/atom_application.h

@@ -40,6 +40,26 @@ typedef NS_ENUM(NSInteger, AVAuthorizationStatusMac) {
 @interface NSColor (MojaveSDK)
 @property(class, strong, readonly)
     NSColor* controlAccentColor API_AVAILABLE(macosx(10.14));
+
+// macOS system colors
+@property(class, strong, readonly)
+    NSColor* systemBlueColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemBrownColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemGrayColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemGreenColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemOrangeColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemPinkColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemPurpleColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemRedColor API_AVAILABLE(macosx(10.10));
+@property(class, strong, readonly)
+    NSColor* systemYellowColor API_AVAILABLE(macosx(10.10));
 @end
 
 extern "C" {

docs/api/system-preferences.md

@@ -291,6 +291,21 @@ See the [Windows docs][windows-colors] for more details.
 
 [windows-colors]:https://msdn.microsoft.com/en-us/library/windows/desktop/ms724371(v=vs.85).aspx
 
+### `systemPreferences.getSystemColor(color)` _macOS_
+
+* `color` String - One of the following values:
+  * `blue`
+  * `brown`
+  * `gray`
+  * `green`
+  * `orange`
+  * `pink`
+  * `purple`
+  * `red`
+  * `yellow`
+
+Returns one of several standard system colors that automatically adapt to vibrancy and changes in accessibility settings like 'Increase contrast' and 'Reduce transparency'. See [Apple Documentation](https://developer.apple.com/design/human-interface-guidelines/macos/visual-design/color#system-colors) for  more details.
+
 ### `systemPreferences.isInvertedColorScheme()` _Windows_
 
 Returns `Boolean` - `true` if an inverted color scheme (a high contrast color scheme with light text and dark backgrounds) is active, `false` otherwise.