From 5388aabf0b581a69405125ec0cdaf05ae2455133 Mon Sep 17 00:00:00 2001
From: Allan Wang <me@allanwang.ca>
Date: Tue, 31 Dec 2019 11:25:29 -0800
Subject: Add lazy ui

---
 .../main/kotlin/ca/allanwang/kau/kotlin/LazyUi.kt  |  6 +++
 .../ca/allanwang/kau/swipe/SwipeBackLayout.kt      | 50 ++++++++++++++--------
 2 files changed, 39 insertions(+), 17 deletions(-)
 create mode 100644 core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyUi.kt

(limited to 'core')

diff --git a/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyUi.kt b/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyUi.kt
new file mode 100644
index 0000000..28994e4
--- /dev/null
+++ b/core/src/main/kotlin/ca/allanwang/kau/kotlin/LazyUi.kt
@@ -0,0 +1,6 @@
+package ca.allanwang.kau.kotlin
+
+/**
+ * Shortcut for unsynchronized lazy block
+ */
+fun <T> lazyUi(initializer: () -> T): Lazy<T> = lazy(LazyThreadSafetyMode.NONE, initializer)
\ No newline at end of file
diff --git a/core/src/main/kotlin/ca/allanwang/kau/swipe/SwipeBackLayout.kt b/core/src/main/kotlin/ca/allanwang/kau/swipe/SwipeBackLayout.kt
index b2d9a5f..4f9d54f 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/swipe/SwipeBackLayout.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/swipe/SwipeBackLayout.kt
@@ -105,21 +105,18 @@ internal class SwipeBackLayout @JvmOverloads constructor(
     private var statusBarBase: Int = 0
     private var navBarBase: Int = 0
 
-    val chromeFadeListener: SwipeListener by lazy {
-        object : SwipeListener {
-            @SuppressLint("NewApi")
-            override fun onScroll(percent: Float, px: Int, edgeFlag: Int) {
-                if (!transitionSystemBars) return
-                activity?.apply {
-                    statusBarColor = statusBarBase.adjustAlpha(scrimOpacity)
-                    navigationBarColor = navBarBase.adjustAlpha(scrimOpacity)
-                }
+    private val chromeFadeListener: SwipeListener = object : SwipeListener {
+        override fun onScroll(percent: Float, px: Int, edgeFlag: Int) {
+            if (!transitionSystemBars) return
+            activity?.apply {
+                statusBarColor = statusBarBase.adjustAlpha(scrimOpacity)
+                navigationBarColor = navBarBase.adjustAlpha(scrimOpacity)
             }
+        }
 
-            override fun onEdgeTouch() {}
+        override fun onEdgeTouch() {}
 
-            override fun onScrollToClose(edgeFlag: Int) {}
-        }
+        override fun onScrollToClose(edgeFlag: Int) {}
     }
 
     private var inLayout: Boolean = false
@@ -135,7 +132,13 @@ internal class SwipeBackLayout @JvmOverloads constructor(
          * We will verify that only one axis is used at a time
          */
         set(value) {
-            if (value !in arrayOf(SWIPE_EDGE_TOP, SWIPE_EDGE_BOTTOM, SWIPE_EDGE_LEFT, SWIPE_EDGE_RIGHT)) {
+            if (value !in arrayOf(
+                    SWIPE_EDGE_TOP,
+                    SWIPE_EDGE_BOTTOM,
+                    SWIPE_EDGE_LEFT,
+                    SWIPE_EDGE_RIGHT
+                )
+            ) {
                 throw IllegalArgumentException("Edge flag is not valid; use one of the SWIPE_EDGE_* values")
             }
             field = value
@@ -275,7 +278,12 @@ internal class SwipeBackLayout @JvmOverloads constructor(
             xOffset = 0
             yOffset = contentOffset
         }
-        contentView.layout(xOffset, yOffset, xOffset + contentView.measuredWidth, yOffset + contentView.measuredHeight)
+        contentView.layout(
+            xOffset,
+            yOffset,
+            xOffset + contentView.measuredWidth,
+            yOffset + contentView.measuredHeight
+        )
         inLayout = false
     }
 
@@ -364,13 +372,21 @@ internal class SwipeBackLayout @JvmOverloads constructor(
             return if (!horizontal) 1 else 0
         }
 
-        override fun onViewPositionChanged(changedView: View, left: Int, top: Int, dx: Int, dy: Int) {
+        override fun onViewPositionChanged(
+            changedView: View,
+            left: Int,
+            top: Int,
+            dx: Int,
+            dy: Int
+        ) {
             super.onViewPositionChanged(changedView, left, top, dx, dy)
             val contentView = contentViewRef.get()
                 ?: return KL.e { "KauSwipe cannot change view position as contentView is null; is onPostCreate called?" }
             // make sure that we are using the proper axis
-            scrollPercent = abs(if (horizontal) left.toFloat() / contentView.width
-                else (top.toFloat() / contentView.height))
+            scrollPercent = abs(
+                if (horizontal) left.toFloat() / contentView.width
+                else (top.toFloat() / contentView.height)
+            )
             contentOffset = if (horizontal) left else top
             invalidate()
             if (scrollPercent < scrollThreshold && !isScrollOverValid)
-- 
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