Merge "Add a WM server side utility to cache and read trunk stable flags" into main (437b648e) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/wm/WindowManagerFlags.java

0 → 100644

+49 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2023 The Android Open Source Project
		*
		* 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.android.server.wm;

		import com.android.window.flags.Flags;

		/**
		* Utility class to read the flags used in the WindowManager server.
		*
		* It is not very cheap to read trunk stable flag, so having a centralized place to cache the flag
		* values in the system server side.
		*
		* Flags should be defined in `core.java.android.window.flags` to allow access from client side.
		*
		* To override flag:
		* adb shell device_config put [namespace] [package].[name] [true/false]
		* adb reboot
		*
		* To access in wm:
		* {@link WindowManagerService#mFlags}
		*
		* Notes:
		* The system may use flags at anytime, so changing flags will only take effect after device
		* reboot. Otherwise, it may result unexpected behavior, such as broken transition.
		* When a flag needs to be read from both the server side and the client side, changing the flag
		* value will result difference in server and client until device reboot.
		*/
		class WindowManagerFlags {

		/* Start Available Flags */

		final boolean mSyncWindowConfigUpdateFlag = Flags.syncWindowConfigUpdateFlag();

		/* End Available Flags */
		}

services/core/java/com/android/server/wm/WindowManagerService.java

+3 −0

Original line number	Diff line number	Diff line
		@@ -547,6 +547,8 @@ public class WindowManagerService extends IWindowManager.Stub
		@VisibleForTesting
		WindowManagerPolicy mPolicy;

		final WindowManagerFlags mFlags;

		final IActivityManager mActivityManager;
		final ActivityManagerInternal mAmInternal;
		final UserManagerInternal mUmInternal;
		@@ -1153,6 +1155,7 @@ public class WindowManagerService extends IWindowManager.Stub
		mGlobalLock = atm.getGlobalLock();
		mAtmService = atm;
		mContext = context;
		mFlags = new WindowManagerFlags();
		mIsPc = mContext.getPackageManager().hasSystemFeature(FEATURE_PC);
		mAllowBootMessages = showBootMsgs;
		mLimitedAlphaCompositing = context.getResources().getBoolean(