From 8da610832945a937f34b772d2944422b37d8f372 Mon Sep 17 00:00:00 2001
From: SOUP <soupyong@gmail.com>
Date: Mon, 16 Nov 2020 00:36:16 +0900
Subject: [PATCH] Library: Reduce items jank in RecyclerView (#25)

---
 .../soup/neumorphism/NeumorphShapeDrawable.kt | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/neumorphism/src/main/java/soup/neumorphism/NeumorphShapeDrawable.kt b/neumorphism/src/main/java/soup/neumorphism/NeumorphShapeDrawable.kt
index 3fe7ec0..50cc5e8 100644
--- a/neumorphism/src/main/java/soup/neumorphism/NeumorphShapeDrawable.kt
+++ b/neumorphism/src/main/java/soup/neumorphism/NeumorphShapeDrawable.kt
@@ -237,7 +237,10 @@ class NeumorphShapeDrawable : Drawable {
     }
 
     override fun invalidateSelf() {
-        dirty = true
+        // To reduce jank in RecyclerView.
+        if (isVisibleChanging.not()) {
+            dirty = true
+        }
         super.invalidateSelf()
     }
 
@@ -265,6 +268,15 @@ class NeumorphShapeDrawable : Drawable {
                 && strokePaint.strokeWidth > 0)
     }
 
+    private var isVisibleChanging = false
+
+    override fun setVisible(visible: Boolean, restart: Boolean): Boolean {
+        isVisibleChanging = true
+        return super.setVisible(visible, restart).apply {
+            isVisibleChanging = false
+        }
+    }
+
     override fun onBoundsChange(bounds: Rect) {
         dirty = true
         super.onBoundsChange(bounds)
@@ -324,7 +336,12 @@ class NeumorphShapeDrawable : Drawable {
             CornerFamily.ROUNDED -> {
                 path.addRoundRect(
                     left, top, right, bottom,
-                    shapeAppearanceModel.getCornerRadii(min(bounds.width() / 2f, bounds.height() / 2f)),
+                    shapeAppearanceModel.getCornerRadii(
+                        min(
+                            bounds.width() / 2f,
+                            bounds.height() / 2f
+                        )
+                    ),
                     Path.Direction.CW
                 )
             }