Feature/calayer set figma shadow tokens

Sources/CALayer+SetFigmaShadowTokens.swift

@@ -0,0 +1,148 @@
+//
+//  CALayer+setFigmaShadowTokens.swift
+//
+//
+//  Created by Paul Addy on 2/12/22.
+//
+
+import UIKit
+#if os(iOS)
+//ref: https://stackoverflow.com/questions/34269399/how-to-control-shadow-spread-and-blur
+extension CALayer {
+    func setFigmaShadowTokens(value: Any?) {
+        print("RAS/SwiftTheme setFigmaShadowTokens value \(value)")
+        guard let figmaValues = value as? [String: Any] else {
+            fatalError("Could not cast figmaTokenValuesRaw to Dictionary")
+        }
+
+        var xOffset: CGFloat = 0
+        var yOffset: CGFloat = 0
+        var blur: CGFloat = 0
+        var spread: CGFloat = 0
+        var color: UIColor = .black
+        var opacity: Float = 0
+
+        for (key, value) in figmaValues {
+            switch key {
+            case "x":
+                xOffset = value as! CGFloat
+            case "y":
+                yOffset = value as! CGFloat
+            case "blur":
+                blur = value as! CGFloat
+            case "spread":
+                spread = value as! CGFloat
+            case "color":
+                color = getColor(hexadecimal: value)
+                opacity = getOpacity(hexadecimal: value)
+            case "type":
+                guard let type = value as? String,
+                      type == "dropShadow" else {
+                    assertionFailure("missingData")
+                    return
+                }
+            default:
+                assertionFailure("missingData")
+            }
+        }
+
+        masksToBounds = false
+        shadowColor = color.cgColor
+        shadowOpacity = opacity
+        shadowOffset = CGSize(width: xOffset, height: yOffset)
+        shadowRadius = blur / 2.0
+        if spread == 0 {
+            shadowPath = nil
+        } else {
+            let dx = -spread
+            let rect = bounds.insetBy(dx: dx, dy: dx)
+            shadowPath = UIBezierPath(rect: rect).cgPath
+        }
+    }
+
+    func getColor(hexadecimal: Any?) -> UIColor {
+        guard let hex = hexadecimal as? String,
+              hex.hasPrefix("#"),
+              hex.count == 9 else {
+            assertionFailure("missingData")
+            return .black
+        }
+
+        var colorString = hex
+        colorString.removeLast(2)
+
+        guard let color = UIColor(hex: colorString) else {
+            assertionFailure("missingData")
+            return .black
+        }
+
+        return color
+    }
+
+    func getOpacity(hexadecimal: Any?) -> Float {
+        guard let hex = hexadecimal as? String,
+              hex.hasPrefix("#"),
+              hex.count == 9 else {
+            assertionFailure("missingData")
+            return 0.0
+        }
+
+        let alpha: Float
+        let start = hex.index(hex.startIndex, offsetBy: 1)
+        let hexColor = String(hex[start...])
+
+        guard hexColor.count == 8 else {
+            assertionFailure("missingData")
+            return 0.0
+        }
+
+        let scanner = Scanner(string: hexColor)
+        var hexNumber: UInt64 = 0
+
+        guard scanner.scanHexInt64(&hexNumber) else {
+            assertionFailure("missingData")
+            return 0.0
+        }
+
+        alpha = Float(hexNumber & 0x000000ff) / 255
+        return alpha
+    }
+}
+
+
+// ref: https://www.hackingwithswift.com/example-code/uicolor/how-to-convert-a-hex-color-to-a-uicolor
+fileprivate extension UIColor {
+    convenience init?(hex: String) {
+        guard hex.hasPrefix("#") else {
+            assertionFailure("missingData")
+            return nil
+        }
+
+        let red: CGFloat
+        let green: CGFloat
+        let blue: CGFloat
+        let alpha: CGFloat
+
+        let start = hex.index(hex.startIndex, offsetBy: 1)
+        let hexColor = String(hex[start...]) + "ff"
+        guard hexColor.count == 8 else {
+            assertionFailure("missingData")
+            return nil
+        }
+
+        let scanner = Scanner(string: hexColor)
+        var hexNumber: UInt64 = 0
+
+        guard scanner.scanHexInt64(&hexNumber) else {
+            assertionFailure("missingData")
+            return nil
+        }
+        red = CGFloat((hexNumber & 0xff000000) >> 24) / 255
+        green = CGFloat((hexNumber & 0x00ff0000) >> 16) / 255
+        blue = CGFloat((hexNumber & 0x0000ff00) >> 8) / 255
+        alpha = CGFloat(hexNumber & 0x000000ff) / 255
+        self.init(red: red, green: green, blue: blue, alpha: alpha)
+        return
+    }
+}
+#endif

Sources/NSLayoutConstraint+Theme.swift

@@ -0,0 +1,21 @@
+//
+//  NSLayoutConstraint+Theme.swift
+//
+//  Setters used by ThemePickers operating on NSLayoutConstraint.
+//
+//  Created by Ryan Tan on 29/11/22.
+//
+
+import UIKit
+
+#if os(iOS)
+extension NSLayoutConstraint {
+
+    /// Sets constant for the constraint.
+    ///
+    /// Triggered by SwiftTheme when theme_constraintConstant is used.
+    @objc func setConstraintConstant(_ value: CGFloat) {
+        constant = value
+    }
+}
+#endif

Sources/UIKit+Theme.swift

@@ -22,6 +22,18 @@ import UIKit
         get { return getThemePicker(self, "setTintColor:") as? ThemeColorPicker }
         set { setThemePicker(self, "setTintColor:", newValue) }
     }
+    var theme_backgroundColorOrGradient: ThemeAnyPicker? {
+        get { return getThemePicker(self, "setBackgroundColorOrGradient:") as? ThemeAnyPicker }
+        set { setThemePicker(self, "setBackgroundColorOrGradient:", newValue) }
+    }
+    var theme_widthConstant: ThemeCGFloatPicker? {
+        get { return getThemePicker(self, "setWidthConstantConstraint:") as? ThemeCGFloatPicker }
+        set { setThemePicker(self, "setWidthConstantConstraint:", newValue) }
+    }
+    var theme_heightConstant: ThemeCGFloatPicker? {
+        get { return getThemePicker(self, "setHeightConstantConstraint:") as? ThemeCGFloatPicker }
+        set { setThemePicker(self, "setHeightConstantConstraint:", newValue) }
+    }
 }
 @objc public extension UIApplication
 {
@@ -311,6 +323,10 @@ import UIKit
         get { return getThemePicker(self, "setFillColor:") as? ThemeCGColorPicker }
         set { setThemePicker(self, "setFillColor:", newValue) }
     }
+    var theme_figmaShadow: ThemeAnyPicker? {
+        get { return getThemePicker(self, "setFigmaShadowTokens:") as? ThemeAnyPicker }
+        set { setThemePicker(self, "setFigmaShadowTokens:", newValue) }
+    }
 }
 @objc public extension CATextLayer
 {
@@ -397,6 +413,20 @@ import UIKit
         set { setThemePicker(self, "setEffect:", newValue) }
     }
 }
+@objc public extension NSLayoutConstraint
+{
+    var theme_constraintConstant: ThemeCGFloatPicker? {
+        get { return getThemePicker(self, "setConstraintConstant:") as? ThemeCGFloatPicker }
+        set { setThemePicker(self, "setConstraintConstant:", newValue) }
+    }
+}
+@objc public extension UIStackView
+{
+    var theme_stackViewSpacing: ThemeCGFloatPicker? {
+        get { return getThemePicker(self, "setStackViewSpacing:") as? ThemeCGFloatPicker }
+        set { setThemePicker(self, "setStackViewSpacing:", newValue) }
+    }
+}
 @available(iOS 13.0, *)
 @objc public extension UINavigationBarAppearance
 {

Sources/UIStackview+Theme.swift

@@ -0,0 +1,21 @@
+//
+//  UIStackview+Theme.swift
+//
+//  Setters used by ThemePickers operating on UIStackView.
+//
+//  Created by Ryan Tan on 29/11/22.
+//
+
+import UIKit
+
+#if os(iOS)
+extension UIStackView {
+
+    /// Sets spacing on stack views..
+    ///
+    /// Triggered by SwiftTheme when theme_stackViewSpacing is used.
+    @objc func setStackViewSpacing(_ value: CGFloat) {
+        spacing = value
+    }
+}
+#endif

SwiftTheme.xcodeproj/project.pbxproj

@@ -141,6 +141,8 @@
 		A3D5F8191E3C56CD00F901C1 /* ThemeActivityIndicatorViewStylePicker.swift in Sources */ = {isa = PBXBuildFile; fileRef = A3D5F8181E3C56CD00F901C1 /* ThemeActivityIndicatorViewStylePicker.swift */; };
 		A3D5F81E1E3C5B1F00F901C1 /* ThemeFontPicker.swift in Sources */ = {isa = PBXBuildFile; fileRef = A3D5F81D1E3C5B1F00F901C1 /* ThemeFontPicker.swift */; };
 		C7C3CC1E21CF8D6300DDA4C1 /* ThemeScrollViewIndicatorStylePicker.swift in Sources */ = {isa = PBXBuildFile; fileRef = C7C3CC1D21CF8D6300DDA4C1 /* ThemeScrollViewIndicatorStylePicker.swift */; };
+		DC731C36293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift in Sources */ = {isa = PBXBuildFile; fileRef = DC731C35293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift */; };
+		DC731C37293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift in Sources */ = {isa = PBXBuildFile; fileRef = DC731C35293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -357,6 +359,7 @@
 		A3D5F81D1E3C5B1F00F901C1 /* ThemeFontPicker.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ThemeFontPicker.swift; sourceTree = "<group>"; };
 		A3EF94C91CEC29FD0068F86C /* PlistDemo-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "PlistDemo-Bridging-Header.h"; sourceTree = "<group>"; };
 		C7C3CC1D21CF8D6300DDA4C1 /* ThemeScrollViewIndicatorStylePicker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThemeScrollViewIndicatorStylePicker.swift; sourceTree = "<group>"; };
+		DC731C35293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "CALayer+SetFigmaShadowTokens.swift"; sourceTree = "<group>"; };
 		ECEAC74D333D35C31C5B72FB /* Pods-PlistDemo.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-PlistDemo.debug.xcconfig"; path = "Pods/Target Support Files/Pods-PlistDemo/Pods-PlistDemo.debug.xcconfig"; sourceTree = "<group>"; };
 		F49FBCCD673D55E76D872AA5 /* libPods-PlistDemo.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-PlistDemo.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 /* End PBXFileReference section */
@@ -624,6 +627,7 @@
 		18D642DF1C53638200DADEC5 /* Sources */ = {
 			isa = PBXGroup;
 			children = (
+				DC731C35293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift */,
 				1C6079BA231B7D2200BCE899 /* ThemeAttributes */,
 				A373E3A31E3C387D00ED2F2B /* ThemePickers */,
 				18D642E31C53638200DADEC5 /* NSObject+Theme.swift */,
@@ -1179,6 +1183,7 @@
 				A3A389991D8E2F2800797F17 /* ThemeManager+OC.swift in Sources */,
 				0AD183E6204F8B90005F5D85 /* UITextField+PlaceholderAttributes.swift in Sources */,
 				A373E3811E3C341200ED2F2B /* ThemeColorPicker.swift in Sources */,
+				DC731C36293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -1242,6 +1247,7 @@
 				A37F8C891F8A43B300ABB5EC /* ThemeImagePicker.swift in Sources */,
 				A37F8C971F8A551E00ABB5EC /* ThemeStatusBarStylePicker.swift in Sources */,
 				A37F8C8A1F8A43B300ABB5EC /* ThemeStatePicker.swift in Sources */,
+				DC731C37293D801C0001DD16 /* CALayer+SetFigmaShadowTokens.swift in Sources */,
 				A37F8C8D1F8A43B300ABB5EC /* ThemeActivityIndicatorViewStylePicker.swift in Sources */,
 				A37F8C8E1F8A43B300ABB5EC /* ThemeKeyboardAppearancePicker.swift in Sources */,
 				A37F8C8F1F8A43B300ABB5EC /* ThemeManager.swift in Sources */,