From 12a1cda0642c4a45e3fe65460adb293487a1138c Mon Sep 17 00:00:00 2001
From: Dominic Go <18517029+dominicstop@users.noreply.github.com>
Date: Fri, 26 May 2023 04:12:32 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=AB=20Update:=20Exp=20-=20`swift-progr?=
 =?UTF-8?q?ammatic-modal`?=
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---
 .../AdaptiveModal/AdaptiveModalManager.swift  | 84 ++++++++++++++++++-
 .../Test/RNIDraggableTestViewController.swift |  4 +-
 2 files changed, 86 insertions(+), 2 deletions(-)

diff --git a/experiments/swift-programmatic-modal/AdaptiveModal/AdaptiveModalManager.swift b/experiments/swift-programmatic-modal/AdaptiveModal/AdaptiveModalManager.swift
index 6a55f9a4..4c243deb 100644
--- a/experiments/swift-programmatic-modal/AdaptiveModal/AdaptiveModalManager.swift
+++ b/experiments/swift-programmatic-modal/AdaptiveModal/AdaptiveModalManager.swift
@@ -86,6 +86,8 @@ class AdaptiveModalManager {
   var targetRectProvider: () -> CGRect;
   var currentSizeProvider: () -> CGSize;
   
+  var gestureOffset: CGFloat?;
+  
   weak var modalView: UIView?;
   
   let snapPoints: [RNILayout] = [
@@ -202,7 +204,87 @@ class AdaptiveModalManager {
     );
   };
   
-  func computeFrame(
+  func interpolateModalRect(
+    forGesturePointInTargetRect gesturePointInTargetRect: CGPoint,
+    gesturePointRelativeToModal: CGPoint
+  ) -> CGRect {
+    guard let modalView = self.modalView else { return .zero };
+    
+    let targetRect = self.targetRectProvider();
+    let modalRect = modalView.frame;
+    
+    let snapRects = self.computedSnapRects.reversed();
+    
+    let gestureOffset = self.gestureOffset ??
+      gesturePointInTargetRect.y - modalRect.origin.y;
+    
+    if self.gestureOffset == nil {
+      self.gestureOffset = gestureOffset;
+    };
+    
+    let gestureInput = gesturePointInTargetRect.y - gestureOffset;
+    let rangeInputGesture = snapRects.map { $0.minY };
+    
+    print(
+        "gesturePoint: \(gesturePointInTargetRect)"
+      + "\n" + " - gesturePointRelativeToModal: \(gesturePointRelativeToModal)"
+      + "\n" + " - targetRect: \(targetRect)"
+      + "\n" + " - gestureInput: \(gestureInput)"
+      + "\n" + " - offset: \(gestureOffset)"
+      + "\n" + " - snapRects: \(snapRects)"
+      + "\n" + " - rangeInputGesture: \(rangeInputGesture)"
+    );
+    
+    let nextHeight = Self.interpolate(
+      inputValue: gestureInput,
+      rangeInput: rangeInputGesture,
+      rangeOutput: snapRects.map { $0.height }
+    );
+    
+    print(" - nextHeight: \(nextHeight!)");
+    
+    let nextWidth = Self.interpolate(
+      inputValue: gestureInput,
+      rangeInput: rangeInputGesture,
+      rangeOutput: snapRects.map { $0.width }
+    );
+    
+    print(" - nextWidth: \(nextWidth!)");
+    
+    let nextX = Self.interpolate(
+      inputValue: gestureInput,
+      rangeInput: rangeInputGesture,
+      rangeOutput: snapRects.map { $0.minX }
+    );
+    
+    print(" - nextX: \(nextX!)");
+    
+    let nextY = Self.interpolate(
+      inputValue: gestureInput,
+      rangeInput: rangeInputGesture,
+      rangeOutput: snapRects.map { $0.minY }
+    )!;
+
+    print(" - nextY: \(nextY)");
+    
+    let nextRect = CGRect(
+      x: nextX!,
+      y: nextY,
+      width: nextWidth!,
+      height: nextHeight!
+    );
+    
+    print(
+               " - modalRect: \(modalRect)"
+      + "\n" + " - nextRect: \(nextRect)"
+      + "\n"
+    );
+    
+    return nextRect;
+  };
+  
+  
+  func _computeFrame(
     forGesturePointInTargetRect gesturePointInTargetRect: CGPoint,
     gesturePointRelativeToModal: CGPoint
   ) -> CGRect {
diff --git a/experiments/swift-programmatic-modal/Test/RNIDraggableTestViewController.swift b/experiments/swift-programmatic-modal/Test/RNIDraggableTestViewController.swift
index d1c40d6c..46167071 100644
--- a/experiments/swift-programmatic-modal/Test/RNIDraggableTestViewController.swift
+++ b/experiments/swift-programmatic-modal/Test/RNIDraggableTestViewController.swift
@@ -139,6 +139,8 @@ class RNIDraggableTestViewController : UIViewController {
         self.initialGesturePoint = gesturePoint;
     
       case .cancelled, .ended:
+        self.modalManager.gestureOffset = nil;
+        
         let gesturePointDiff = self.initialGesturePoint.y - gesturePoint.y;
         let isIncreasing = gesturePointDiff >= 0;
       
@@ -154,7 +156,7 @@ class RNIDraggableTestViewController : UIViewController {
         break;
         
       case .changed:
-        let computedRect = self.modalManager.computeFrame(
+        let computedRect = self.modalManager.interpolateModalRect(
           forGesturePointInTargetRect: gesturePoint,
           gesturePointRelativeToModal: relativeGesturePoint
         );