//fbandroid/libraries/rendercore/rendercore-transitions/src/main/java…

…/com/facebook/rendercore/transitions/TransitionUtils.java Differential Revision: D58362943 fbshipit-source-id: 6ac5ed3e4604d52df259ef3eefd7ce6f2d635aa3
facebook · Jun 13, 2024 · 5be03cc · 5be03cc
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diff --git a/...ercore-transitions/src/main/java/com/facebook/rendercore/transitions/TransitionUtils.java b/...ercore-transitions/src/main/java/com/facebook/rendercore/transitions/TransitionUtils.java
diff --git a/...ndercore-transitions/src/main/java/com/facebook/rendercore/transitions/TransitionUtils.kt b/...ndercore-transitions/src/main/java/com/facebook/rendercore/transitions/TransitionUtils.kt
@@ -0,0 +1,152 @@
+/*
+ * 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.rendercore.transitions
+
+import android.graphics.drawable.Drawable
+import com.facebook.litho.Transition
+import com.facebook.litho.Transition.BaseTransitionUnitsBuilder
+import com.facebook.litho.Transition.RootBoundsTransition
+import com.facebook.litho.Transition.TransitionKeyType
+import com.facebook.litho.Transition.TransitionUnit
+import com.facebook.litho.TransitionId
+import com.facebook.litho.TransitionSet
+import com.facebook.litho.animation.AnimatedProperty
+
+object TransitionUtils {
+
+  @JvmStatic
+  fun applySizeToDrawableForAnimation(drawable: Drawable, width: Int, height: Int) {
+    val bounds = drawable.bounds
+    drawable.setBounds(bounds.left, bounds.top, bounds.left + width, bounds.top + height)
+    if (drawable is BoundsCallback) {
+      drawable.onWidthHeightBoundsApplied(width, height)
+    }
+  }
+
+  @JvmStatic
+  fun applyXYToDrawableForAnimation(drawable: Drawable, x: Int, y: Int) {
+    val bounds = drawable.bounds
+    drawable.setBounds(x, y, bounds.width() + x, bounds.height() + y)
+    if (drawable is BoundsCallback) {
+      drawable.onXYBoundsApplied(x, y)
+    }
+  }
+
+  /**
+   * Collects info about root component bounds animation, specifically whether it has animations for
+   * width and height also [Transition.TransitionUnit] for appear animation if such is defined.
+   */
+  @JvmStatic
+  fun collectRootBoundsTransitions(
+      rootTransitionId: TransitionId,
+      transition: Transition,
+      property: AnimatedProperty,
+      outRootBoundsTransition: RootBoundsTransition
+  ) {
+    when (transition) {
+      is TransitionSet -> {
+        val children = transition.children
+        for (i in children.indices) {
+          collectRootBoundsTransitions(
+              rootTransitionId, children[i], property, outRootBoundsTransition)
+        }
+      }
+      is TransitionUnit -> {
+        if (transition.targets(rootTransitionId) && transition.targetsProperty(property)) {
+          outRootBoundsTransition.hasTransition = true
+          if (transition.hasAppearAnimation()) {
+            outRootBoundsTransition.appearTransition = transition
+          }
+        }
+      }
+      is BaseTransitionUnitsBuilder -> {
+        val units = transition.transitionUnits
+        for (i in units.indices) {
+          collectRootBoundsTransitions(
+              rootTransitionId, units[i], property, outRootBoundsTransition)
+        }
+      }
+      else -> throw RuntimeException("Unhandled transition type: $transition")
+    }
+  }
+
+  @JvmStatic
+  fun createTransitionId(
+      transitionKey: String?,
+      transitionKeyType: TransitionKeyType?,
+      transitionOwnerKey: String?,
+      transitionGlobalKey: String?
+  ): TransitionId? {
+    @TransitionId.Type val type: Int
+    val reference: String?
+    val extraData: String?
+    if (!transitionKey.isNullOrEmpty()) {
+      reference = transitionKey
+      when (transitionKeyType) {
+        TransitionKeyType.GLOBAL -> {
+          type = TransitionId.Type.GLOBAL
+          extraData = null
+        }
+        TransitionKeyType.LOCAL -> {
+          type = TransitionId.Type.SCOPED
+          extraData = transitionOwnerKey
+        }
+        else -> throw IllegalArgumentException("Unhandled transition key type $transitionKeyType")
+      }
+    } else {
+      reference = transitionGlobalKey
+      type = TransitionId.Type.AUTOGENERATED
+      extraData = null
+    }
+    return reference?.let { TransitionId(type, it, extraData) }
+  }
+
+  @JvmStatic
+  fun addTransitions(transition: Transition, outList: MutableList<Transition>) {
+    if (transition is BaseTransitionUnitsBuilder) {
+      outList.addAll(transition.transitionUnits)
+    } else {
+      outList.add(transition)
+    }
+  }
+
+  @JvmStatic
+  fun setOwnerKey(transition: Transition, ownerKey: String?) {
+    when (transition) {
+      is TransitionUnit -> transition.setOwnerKey(ownerKey)
+      is TransitionSet -> {
+        val children = transition.children
+        for (index in children.indices.reversed()) {
+          setOwnerKey(children[index], ownerKey)
+        }
+      }
+      is BaseTransitionUnitsBuilder -> {
+        val units = transition.transitionUnits
+        for (index in units.indices.reversed()) {
+          units[index].setOwnerKey(ownerKey)
+        }
+      }
+      else -> throw RuntimeException("Unhandled transition type: $transition")
+    }
+  }
+
+  interface BoundsCallback {
+    fun onWidthHeightBoundsApplied(width: Int, height: Int)
+
+    fun onXYBoundsApplied(x: Int, y: Int)
+  }
+}