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.traces.monitors.wm
18 
19 import android.tools.io.TraceType
20 import android.tools.traces.monitors.TraceMonitor
21 import android.tools.traces.wm.TransitionsTrace
22 import android.view.WindowManagerGlobal
23 import java.io.File
24 
25 /** Captures [TransitionsTrace] from SurfaceFlinger. */
26 open class LegacyWmTransitionTraceMonitor : TraceMonitor() {
27     private val windowManager =
28         WindowManagerGlobal.getWindowManagerService() ?: error("Unable to acquire WindowManager")
29     override val traceType = TraceType.LEGACY_WM_TRANSITION
30     override val isEnabled
31         get() = windowManager.isTransitionTraceEnabled
32 
doStartnull33     override fun doStart() {
34         windowManager.startTransitionTrace()
35     }
36 
doStopnull37     override fun doStop(): File {
38         windowManager.stopTransitionTrace()
39         return TRACE_DIR.resolve(traceType.fileName)
40     }
41 }
42