From d744193925826ab4c67aa08574d9a67e101e3a4e Mon Sep 17 00:00:00 2001
From: Luke Zhao <me@lkzhao.com>
Date: Fri, 10 Jun 2022 11:09:43 -0700
Subject: [PATCH] add double tap support

---
 .../Components/View/TappableView.swift         | 18 ++++++++++++++++++
 .../Core/ComponentView/ComponentEngine.swift   |  4 ++--
 Sources/UIComponent/Core/Model/Animator.swift  |  6 +-----
 3 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/Sources/UIComponent/Components/View/TappableView.swift b/Sources/UIComponent/Components/View/TappableView.swift
index d1d0190f..12bb394c 100644
--- a/Sources/UIComponent/Components/View/TappableView.swift
+++ b/Sources/UIComponent/Components/View/TappableView.swift
@@ -21,6 +21,9 @@ open class TappableView: ComponentView {
     public var configuration: TappableViewConfiguration?
 
     lazy var tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(didTap))
+    lazy var doubleTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(didDoubleTap)).then {
+        $0.numberOfTapsRequired = 2
+    }
     lazy var longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(didLongPress))
     lazy var contextMenuInteraction = UIContextMenuInteraction(delegate: self)
 
@@ -45,6 +48,17 @@ open class TappableView: ComponentView {
         }
     }
 
+    public var onDoubleTap: ((TappableView) -> Void)? {
+        didSet {
+            if onDoubleTap != nil {
+                tapGestureRecognizer.require(toFail: doubleTapGestureRecognizer)
+                addGestureRecognizer(doubleTapGestureRecognizer)
+            } else {
+                removeGestureRecognizer(doubleTapGestureRecognizer)
+            }
+        }
+    }
+
     private var dropInteraction: UIDropInteraction?
     public weak var dropDelegate: UIDropInteractionDelegate? {
         didSet {
@@ -130,6 +144,10 @@ open class TappableView: ComponentView {
         onTap?(self)
     }
 
+    @objc open func didDoubleTap() {
+        onDoubleTap?(self)
+    }
+
     @objc open func didLongPress() {
         if longPressGestureRecognizer.state == .began {
             onLongPress?(self)
diff --git a/Sources/UIComponent/Core/ComponentView/ComponentEngine.swift b/Sources/UIComponent/Core/ComponentView/ComponentEngine.swift
index ce09cfda..d10bcafe 100644
--- a/Sources/UIComponent/Core/ComponentView/ComponentEngine.swift
+++ b/Sources/UIComponent/Core/ComponentView/ComponentEngine.swift
@@ -227,6 +227,7 @@ public class ComponentEngine {
                 newViews[index] = cell
             } else {
                 let animator = visibleRenderable[index].animator ?? animator
+                animator.shift(componentView: componentView, delta: contentOffsetDelta, view: cell)
                 animator.delete(componentView: componentView, view: cell) {
                     cell.recycleForUIComponentReuse()
                 }
@@ -244,8 +245,7 @@ public class ComponentEngine {
                 if updateViews {
                     // view was on screen before reload, need to update the view.
                     viewData.renderNode._updateView(view)
-                    (viewData.animator ?? animator).shift(componentView: componentView, delta: contentOffsetDelta,
-                                                          view: view, frame: frame)
+                    (viewData.animator ?? animator).shift(componentView: componentView, delta: contentOffsetDelta, view: view)
                 }
             } else {
                 view = viewData.renderNode._makeView() as! UIView
diff --git a/Sources/UIComponent/Core/Model/Animator.swift b/Sources/UIComponent/Core/Model/Animator.swift
index 9e36661a..d48d4a7d 100644
--- a/Sources/UIComponent/Core/Model/Animator.swift
+++ b/Sources/UIComponent/Core/Model/Animator.swift
@@ -72,11 +72,7 @@ open class Animator {
     ///   - componentView: source ComponentView
     ///   - delta: changes in contentOffset
     ///   - view: the view being updated
-    ///   - frame: frame provided by the layout
-    open func shift(componentView: ComponentDisplayableView,
-                                    delta: CGPoint,
-                                    view: UIView,
-                                    frame: CGRect) {
+    open func shift(componentView: ComponentDisplayableView, delta: CGPoint, view: UIView) {
         view.center += delta
     }
 }