1 /* 2 * Copyright (C) 2023 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 17 package android.tools.device.traces.monitors.wm 18 19 import android.tools.common.io.TraceType 20 import android.tools.common.traces.wm.TransitionsTrace 21 import android.tools.device.traces.monitors.TraceMonitor 22 import android.view.WindowManagerGlobal 23 import java.io.File 24 25 /** Captures [TransitionsTrace] from SurfaceFlinger. */ 26 open class WmTransitionTraceMonitor : TraceMonitor() { 27 private val windowManager = WindowManagerGlobal.getWindowManagerService() 28 override val traceType = TraceType.WM_TRANSITION 29 override val isEnabled 30 get() = windowManager.isTransitionTraceEnabled 31 doStartnull32 override fun doStart() { 33 windowManager.startTransitionTrace() 34 } 35 doStopnull36 override fun doStop(): File { 37 windowManager.stopTransitionTrace() 38 return TRACE_DIR.resolve(traceType.fileName) 39 } 40 } 41