#40: Add OnboardingSplashScreen from EI.

Update SplashScreen for EXI

ElementX/Sources/Screens/Onboarding/Common/OnboardingMetrics.swift

@@ -0,0 +1,39 @@
+// 
+// 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 SwiftUI
+
+/// Metrics used across the entire onboarding flow.
+struct OnboardingMetrics {
+    static let maxContentWidth: CGFloat = 600
+    static let maxContentHeight: CGFloat = 750
+    
+    /// The padding used between the top of the main content and the navigation bar.
+    static let topPaddingToNavigationBar: CGFloat = 16
+    /// The padding used between the footer and the bottom of the view.
+    static let actionButtonBottomPadding: CGFloat = 24
+    /// The width/height used for the main icon shown in most of the screens.
+    static let iconSize: CGFloat = 90
+    
+    /// The padding used to the top of the view for breaker screens that don't have a navigation bar.
+    static let breakerScreenTopPadding: CGFloat = 80
+    static let breakerScreenIconBottomPadding: CGFloat = 42
+    
+    /// The height to use for top/bottom spacers to pad the views to fit the `maxContentHeight`.
+    static func spacerHeight(in geometry: GeometryProxy) -> CGFloat {
+        max(0, (geometry.size.height - maxContentHeight) / 2)
+    }
+}

ElementX/Sources/Screens/Onboarding/Common/String-Tinting.swift

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+// 
+// 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 SwiftUI
+
+extension String {
+    func tinting(_ character: Character, color: Color = .accentColor) -> AttributedString {
+        var string = AttributedString(self)
+        let characterView = string.characters
+        for index in characterView.indices where characterView[index] == character {
+            string[index..<characterView.index(after: index)].foregroundColor = color
+        }
+        
+        return string
+    }
+}