Convert DefaultDiffNode to Kotlin

Summary: Converts DefaultDiffNode to Kotlin

Reviewed By: zielinskimz

Differential Revision: D47226237

fbshipit-source-id: a77e1ff5273a143cb2915e87710ab5622fab85d9

litho-core/src/main/java/com/facebook/litho/DefaultDiffNode.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.facebook.litho
+
+import com.facebook.rendercore.Mountable
+import com.facebook.rendercore.primitives.Primitive
+import com.facebook.rendercore.visibility.VisibilityOutput
+import java.util.ArrayList
+
+class DefaultDiffNode
+internal constructor(
+ override val component: Component,
+ override val componentGlobalKey: String,
+ override val scopedComponentInfo: ScopedComponentInfo
+) : DiffNode {
+
+ private val _children: MutableList<DiffNode> = ArrayList(4)
+ override var contentOutput: LithoRenderUnit? = null
+ override var backgroundOutput: LithoRenderUnit? = null
+ override var foregroundOutput: LithoRenderUnit? = null
+ override var borderOutput: LithoRenderUnit? = null
+ override var hostOutput: LithoRenderUnit? = null
+ override var visibilityOutput: VisibilityOutput? = null
+ override var mountable: Mountable<*>? = null
+ override var primitive: Primitive? = null
+ override var lastMeasuredWidth: Float = 0f
+ override var lastMeasuredHeight: Float = 0f
+ override var lastWidthSpec: Int = 0
+ override var lastHeightSpec: Int = 0
+ override var layoutData: Any? = null
+
+ override val childCount: Int
+ get() = _children.size
+
+ override fun getChildAt(i: Int): DiffNode = _children[i]
+
+ override val children: List<DiffNode>
+ get() = _children
+
+ override fun addChild(node: DiffNode) {
+ _children.add(node)
+ }
+}