1 /* <lambda>null2 * Copyright (C) 2024 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.wm.shell.desktopmode 17 18 import android.animation.Animator 19 import android.animation.AnimatorListenerAdapter 20 import android.animation.ValueAnimator 21 import android.os.IBinder 22 import android.view.SurfaceControl 23 import android.view.WindowManager.TRANSIT_OPEN 24 import android.window.TransitionInfo 25 import android.window.TransitionRequestInfo 26 import android.window.WindowContainerTransaction 27 import com.android.wm.shell.transition.Transitions 28 import com.android.wm.shell.transition.Transitions.TransitionFinishCallback 29 30 /** Transition handler for drag-and-drop (i.e., tab tear) transitions that occur in desktop mode. */ 31 class DesktopModeDragAndDropTransitionHandler(private val transitions: Transitions) : 32 Transitions.TransitionHandler { 33 private val pendingTransitionTokens: MutableList<IBinder> = mutableListOf() 34 35 /** 36 * Begin a transition when a [android.app.PendingIntent] is dropped without a window to accept 37 * it. 38 */ 39 fun handleDropEvent(wct: WindowContainerTransaction): IBinder { 40 val token = transitions.startTransition(TRANSIT_OPEN, wct, this) 41 pendingTransitionTokens.add(token) 42 return token 43 } 44 45 override fun startAnimation( 46 transition: IBinder, 47 info: TransitionInfo, 48 startTransaction: SurfaceControl.Transaction, 49 finishTransaction: SurfaceControl.Transaction, 50 finishCallback: TransitionFinishCallback, 51 ): Boolean { 52 if (!pendingTransitionTokens.contains(transition)) return false 53 val change = findRelevantChange(info) 54 val leash = change.leash 55 val endBounds = change.endAbsBounds 56 startTransaction 57 .hide(leash) 58 .setWindowCrop(leash, endBounds.width(), endBounds.height()) 59 .apply() 60 val animator = ValueAnimator() 61 animator.setFloatValues(0f, 1f) 62 animator.setDuration(FADE_IN_ANIMATION_DURATION) 63 val t = SurfaceControl.Transaction() 64 animator.addListener( 65 object : AnimatorListenerAdapter() { 66 override fun onAnimationStart(animation: Animator) { 67 t.show(leash) 68 t.apply() 69 } 70 71 override fun onAnimationEnd(animation: Animator) { 72 finishCallback.onTransitionFinished(null) 73 } 74 } 75 ) 76 animator.addUpdateListener { animation: ValueAnimator -> 77 t.setAlpha(leash, animation.animatedFraction) 78 t.apply() 79 } 80 animator.start() 81 pendingTransitionTokens.remove(transition) 82 return true 83 } 84 85 private fun findRelevantChange(info: TransitionInfo): TransitionInfo.Change { 86 val matchingChanges = 87 info.changes.filter { c -> isValidTaskChange(c) && c.mode == TRANSIT_OPEN } 88 if (matchingChanges.size != 1) { 89 throw IllegalStateException( 90 "Expected 1 relevant change but found: ${matchingChanges.size}" 91 ) 92 } 93 return matchingChanges.first() 94 } 95 96 private fun isValidTaskChange(change: TransitionInfo.Change): Boolean = 97 change.taskInfo != null && change.taskInfo?.taskId != -1 98 99 override fun handleRequest( 100 transition: IBinder, 101 request: TransitionRequestInfo, 102 ): WindowContainerTransaction? { 103 return null 104 } 105 106 companion object { 107 const val FADE_IN_ANIMATION_DURATION = 300L 108 } 109 } 110