Add in the shadowed text field cell.

Rebel/RBLShadowedTextFieldCell.h

@@ -0,0 +1,17 @@
+//
+//  RBLShadowedTextFieldCell.h
+//  Rebel
+//
+//  Created by Danny Greg on 18/02/2013.
+//  Copyright (c) 2013 GitHub. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+extern NSInteger const RBLShadowedTextFieldAllBackgroundStyles;
+
+@interface RBLShadowedTextFieldCell : NSTextFieldCell
+
+- (void)setShadow:(NSShadow *)shadow forBackgroundStyle:(NSBackgroundStyle)backgroundStyle;
+
+@end

Rebel/RBLShadowedTextFieldCell.m

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+//
+//  RBLShadowedTextFieldCell.m
+//  Rebel
+//
+//  Created by Danny Greg on 18/02/2013.
+//  Copyright (c) 2013 GitHub. All rights reserved.
+//
+
+#import "RBLShadowedTextFieldCell.h"
+
+#import "NSColor+RBLCGColorAdditions.h"
+
+NSInteger const RBLShadowedTextFieldAllBackgroundStyles = 0xFFFFFFFF;
+
+@interface RBLShadowedTextFieldCell ()
+
+@property (nonatomic, readonly, strong) NSMutableDictionary *backgroundStylesToShadows;
+
+@end
+
+@implementation RBLShadowedTextFieldCell
+
+#pragma mark - Lifecycle
+
+- (void)commonInit {
+	_backgroundStylesToShadows = [NSMutableDictionary dictionary];
+}
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+	self = [super initWithCoder:aDecoder];
+	if (self == nil) return nil;
+	
+	[self commonInit];
+	
+	return self;
+}
+
+- (instancetype)initTextCell:(NSString *)aString {
+	self = [super initTextCell:aString];
+	if (self == nil) return nil;
+	
+	[self commonInit];
+	
+	return self;
+}
+
+#pragma mark - Drawing
+
+- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
+	[NSGraphicsContext saveGraphicsState];
+	NSShadow *shadow = self.backgroundStylesToShadows[@(self.backgroundStyle)];
+	if (shadow == nil) {
+		shadow = self.backgroundStylesToShadows[@(RBLShadowedTextFieldAllBackgroundStyles)];
+	}
+	
+	if (shadow != nil) {
+		CGContextSetShadowWithColor(NSGraphicsContext.currentContext.graphicsPort, shadow.shadowOffset, shadow.shadowBlurRadius, shadow.shadowColor.rbl_CGColor);
+	}
+	
+	[super drawWithFrame:cellFrame inView:controlView];
+	
+	[NSGraphicsContext restoreGraphicsState];
+}
+
+#pragma mark - API
+
+- (void)setShadow:(NSShadow *)shadow forBackgroundStyle:(NSBackgroundStyle)backgroundStyle {
+	if (shadow == nil) {
+		[self.backgroundStylesToShadows removeObjectForKey:@(backgroundStyle)];
+		return;
+	}
+	
+	self.backgroundStylesToShadows[@(backgroundStyle)] = shadow;
+}
+
+@end