Convert animation package to Kotlin

app/src/main/java/org/thoughtcrime/securesms/animation/AnimationCompleteListener.kt

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.animation
+
+import android.animation.Animator
+
+abstract class AnimationCompleteListener : Animator.AnimatorListener {
+  abstract override fun onAnimationEnd(animation: Animator)
+
+  override fun onAnimationStart(animation: Animator) = Unit
+  override fun onAnimationCancel(animation: Animator) = Unit
+  override fun onAnimationRepeat(animation: Animator) = Unit
+}

app/src/main/java/org/thoughtcrime/securesms/animation/AnimationRepeatListener.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.animation
+
+import android.animation.Animator
+import java.util.function.Consumer
+
+class AnimationRepeatListener(private val animationConsumer: Consumer<Animator>) : Animator.AnimatorListener {
+  override fun onAnimationStart(animation: Animator) = Unit
+  override fun onAnimationEnd(animation: Animator) = Unit
+  override fun onAnimationCancel(animation: Animator) = Unit
+
+  override fun onAnimationRepeat(animation: Animator) {
+    animationConsumer.accept(animation)
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/animation/ResizeAnimation.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.animation
+
+import android.graphics.Point
+import android.view.View
+import android.view.animation.Animation
+import android.view.animation.Transformation
+
+class ResizeAnimation : Animation {
+  private val target: View
+  private val targetWidthPx: Int
+  private val targetHeightPx: Int
+
+  private var startWidth: Int = 0
+  private var startHeight: Int = 0
+
+  constructor(target: View, dimension: Point) : this(target, dimension.x, dimension.y)
+
+  constructor(target: View, targetWidthPx: Int, targetHeightPx: Int) {
+    this.target = target
+    this.targetWidthPx = targetWidthPx
+    this.targetHeightPx = targetHeightPx
+  }
+
+  override fun applyTransformation(interpolatedTime: Float, t: Transformation?) {
+    val newWidth = (startWidth + (targetWidthPx - startWidth) * interpolatedTime).toInt()
+    val newHeight = (startHeight + (targetHeightPx - startHeight) * interpolatedTime).toInt()
+
+    target.layoutParams.apply {
+      width = newWidth
+      height = newHeight
+    }
+  }
+
+  override fun initialize(width: Int, height: Int, parentWidth: Int, parentHeight: Int) {
+    super.initialize(width, height, parentWidth, parentHeight)
+
+    startWidth = width
+    startHeight = height
+  }
+
+  override fun willChangeBounds(): Boolean = true
+}

app/src/main/java/org/thoughtcrime/securesms/animation/transitions/CircleSquareImageViewTransition.kt

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.animation.transitions
+
+import android.animation.Animator
+import android.animation.ObjectAnimator
+import android.util.Property
+import android.view.ViewGroup
+import android.widget.ImageView
+import androidx.core.graphics.drawable.RoundedBitmapDrawable
+import androidx.transition.Transition
+import androidx.transition.TransitionValues
+import kotlin.math.min
+
+abstract class CircleSquareImageViewTransition(private val toCircle: Boolean) : Transition() {
+  companion object {
+    private const val CIRCLE_RATIO = "CIRCLE_RATIO"
+
+    class RadiusRatioProperty : Property<ImageView, Float>(Float::class.java, "circle_ratio") {
+      private var ratio: Float = 0.0f
+
+      override fun set(imageView: ImageView?, ratio: Float) {
+        this.ratio = ratio
+
+        imageView ?: return
+        val drawable = imageView.drawable as? RoundedBitmapDrawable ?: return
+        if (ratio > 0.95) {
+          drawable.isCircular = true
+        } else {
+          drawable.cornerRadius = min(drawable.intrinsicWidth, drawable.intrinsicHeight) * ratio * 0.5f
+        }
+      }
+
+      override fun get(imageView: ImageView?): Float = ratio
+    }
+  }
+
+  override fun captureStartValues(transitionValues: TransitionValues) {
+    if (transitionValues.view is ImageView) {
+      transitionValues.values[CIRCLE_RATIO] = if (toCircle) 0f else 1f
+    }
+  }
+
+  override fun captureEndValues(transitionValues: TransitionValues) {
+    if (transitionValues.view is ImageView) {
+      transitionValues.values[CIRCLE_RATIO] = if (toCircle) 1f else 0f
+    }
+  }
+
+  override fun createAnimator(sceneRoot: ViewGroup, startValues: TransitionValues?, endValues: TransitionValues?): Animator? {
+    startValues ?: return null
+    endValues ?: return null
+
+    val endImageView = endValues.view as ImageView
+    val start = startValues.values[CIRCLE_RATIO] as Float
+    val end = startValues.values[CIRCLE_RATIO] as Float
+
+    return ObjectAnimator.ofFloat(endImageView, RadiusRatioProperty(), start, end)
+  }
+}

app/src/main/java/org/thoughtcrime/securesms/animation/transitions/CircleToSquareImageViewTransition.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2024 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.animation.transitions
+
+import android.content.Context
+import android.util.AttributeSet
+
+/**
+ * Will only transition [android.widget.ImageView]s that contain a [androidx.core.graphics.drawable.RoundedBitmapDrawable].
+ */
+class CircleToSquareImageViewTransition(
+  context: Context,
+  attrs: AttributeSet
+) : CircleSquareImageViewTransition(false)