1 files changed, 50 insertions, 0 deletions
diff --git a/platform/macos/src/MGLAttributionButton.m b/platform/macos/src/MGLAttributionButton.m
new file mode 100644
index 0000000000..e21b860794
--- /dev/null
+++ b/platform/macos/src/MGLAttributionButton.m
@@ -0,0 +1,50 @@
+#import "MGLAttributionButton.h"
+
+#import "NSBundle+MGLAdditions.h"
+
+@implementation MGLAttributionButton {
+    NSTrackingRectTag _trackingAreaTag;
+}
+
+- (instancetype)initWithTitle:(NSString *)title URL:(NSURL *)url {
+    if (self = [super initWithFrame:NSZeroRect]) {
+        self.bordered = NO;
+        self.bezelStyle = NSRegularSquareBezelStyle;
+        
+        // Start with a copyright symbol. The whole string will be mini.
+        NSMutableAttributedString *attributedTitle = [[NSMutableAttributedString alloc] initWithString:NSLocalizedStringWithDefaultValue(@"COPYRIGHT_PREFIX", nil, nil, @"© ", @"Copyright notice prefix") attributes:@{
+            NSFontAttributeName: [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSMiniControlSize]],
+        }];
+        // Append the specified title, underlining it like a hyperlink.
+        [attributedTitle appendAttributedString:
+         [[NSAttributedString alloc] initWithString:title
+                                         attributes:@{
+            NSFontAttributeName: [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSMiniControlSize]],
+            NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle),
+        }]];
+        self.attributedTitle = attributedTitle;
+        [self sizeToFit];
+        
+        _URL = url;
+        self.toolTip = _URL.absoluteString;
+        
+        self.target = self;
+        self.action = @selector(openURL:);
+    }
+    return self;
+}
+
+- (BOOL)wantsLayer {
+    return YES;
+}
+
+- (void)resetCursorRects {
+    // The whole button gets a pointing hand cursor, just like a hyperlink.
+    [self addCursorRect:self.bounds cursor:[NSCursor pointingHandCursor]];
+}
+
+- (IBAction)openURL:(__unused id)sender {
+    [[NSWorkspace sharedWorkspace] openURL:self.URL];
+}
+
+@end