0.10.6

Sources/Shared/Models/MessageReplySwipePolicy.swift

@@ -0,0 +1,31 @@
+import CoreGraphics
+
+struct MessageReplySwipePolicy {
+    static let triggerDistance: CGFloat = 64
+    static let maximumOffset: CGFloat = 76
+    static let horizontalDominance: CGFloat = 1.4
+
+    static func offset(for translation: CGSize) -> CGFloat {
+        guard isHorizontal(translation) else { return 0 }
+        let distance = min(abs(translation.width) * 0.72, maximumOffset)
+        return translation.width < 0 ? -distance : distance
+    }
+
+    static func shouldReply(
+        translation: CGSize,
+        predictedEndTranslation: CGSize
+    ) -> Bool {
+        let candidate = abs(predictedEndTranslation.width) > abs(translation.width)
+            ? predictedEndTranslation
+            : translation
+        return isHorizontal(candidate) && abs(candidate.width) >= triggerDistance
+    }
+
+    static func progress(for offset: CGFloat) -> CGFloat {
+        min(1, abs(offset) / triggerDistance)
+    }
+
+    private static func isHorizontal(_ translation: CGSize) -> Bool {
+        abs(translation.width) > abs(translation.height) * horizontalDominance
+    }
+}