DesignKit: Add Fonts implementation.

DesignKit/Variants/Fonts/ElementFonts.swift

@@ -0,0 +1,76 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import UIKit
+
+/// Fonts at  https://www.figma.com/file/X4XTH9iS2KGJ2wFKDqkyed/Compound?node-id=1362%3A0
+@objcMembers
+public class ElementFonts: Fonts {
+    
+    // MARK: - Setup
+    
+    public init() {
+    }
+    
+    // MARK: - Public
+    
+    /// Returns an instance of the font associated with the text style and scaled appropriately for the content size category defined in the trait collection.
+    public func font(forTextStyle textStyle: UIFont.TextStyle, compatibleWith traitCollection: UITraitCollection?) -> UIFont {
+        return UIFont.preferredFont(forTextStyle: textStyle, compatibleWith: traitCollection)
+    }
+    
+    // MARK: TextStyle shortcuts
+    
+    public var largeTitle: UIFont {
+        return self.font(forTextStyle: .largeTitle)
+    }
+            
+    public var title1: UIFont {
+        return self.font(forTextStyle: .title1)
+    }
+    
+    public var title2: UIFont {
+        return self.font(forTextStyle: .title2)
+    }
+    
+    public var title3: UIFont {
+        return self.font(forTextStyle: .title3)
+    }
+    
+    public var headline: UIFont {
+        return self.font(forTextStyle: .headline)
+    }
+    
+    public var subheadline: UIFont {
+        return self.font(forTextStyle: .subheadline)
+    }
+    
+    public var body: UIFont {
+        return self.font(forTextStyle: .body)
+    }
+    
+    public var callout: UIFont {
+        return self.font(forTextStyle: .callout)
+    }
+    
+    public var caption1: UIFont {
+        return self.font(forTextStyle: .caption1)
+    }
+    
+    public var caption2: UIFont {
+        return self.font(forTextStyle: .caption2)
+    }
+}