Add RefactorFlagUtils and an example usage (ab0af704) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/flags/RefactorFlag.kt

+3 −10

Original line number	Diff line number	Diff line
		@@ -16,7 +16,6 @@

		package com.android.systemui.flags

		import android.util.Log
		import com.android.systemui.Dependency

		/**
		@@ -65,8 +64,7 @@ private constructor(
		* }
		* ````
		*/
		fun assertInLegacyMode() =
		check(!isEnabled) { "Legacy code path not supported when $flagName is enabled." }
		fun assertInLegacyMode() = RefactorFlagUtils.assertInLegacyMode(isEnabled, flagName)

		/**
		* Called to ensure code is only run when the flag is enabled. This protects users from the
		@@ -81,13 +79,8 @@ private constructor(
		* }
		* ```
		*/
		fun isUnexpectedlyInLegacyMode(): Boolean {
		if (!isEnabled) {
		val message = "New code path expects $flagName to be enabled."
		Log.wtf(TAG, message, Exception(message))
		}
		return !isEnabled
		}
		fun isUnexpectedlyInLegacyMode(): Boolean =
		RefactorFlagUtils.isUnexpectedlyInLegacyMode(isEnabled, flagName)

		companion object {
		private const val TAG = "RefactorFlag"

packages/SystemUI/src/com/android/systemui/flags/RefactorFlagUtils.kt

0 → 100644

+74 −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.systemui.flags

		import android.util.Log

		/**
		* Utilities for writing your own objects to uphold refactor flag conventions.
		*
		* Example usage:
		* ```
		* object SomeRefactor {
		* const val FLAG_NAME = Flags.SOME_REFACTOR
		* @JvmStatic inline val isEnabled get() = Flags.someRefactor()
		* @JvmStatic inline fun isUnexpectedlyInLegacyMode() =
		* RefactorFlagUtils.isUnexpectedlyInLegacyMode(isEnabled, FLAG_NAME)
		* @JvmStatic inline fun assertInLegacyMode() =
		* RefactorFlagUtils.assertInLegacyMode(isEnabled, FLAG_NAME)
		* }
		* ```
		*/
		@Suppress("NOTHING_TO_INLINE")
		object RefactorFlagUtils {
		/**
		* Called to ensure code is only run when the flag is enabled. This protects users from the
		* unintended behaviors caused by accidentally running new logic, while also crashing on an eng
		* build to ensure that the refactor author catches issues in testing.
		*
		* Example usage:
		* ```
		* public void setNewController(SomeController someController) {
		* if (SomeRefactor.isUnexpectedlyInLegacyMode()) return;
		* mSomeController = someController;
		* }
		* ```
		*/
		inline fun isUnexpectedlyInLegacyMode(isEnabled: Boolean, flagName: Any): Boolean {
		val inLegacyMode = !isEnabled
		if (inLegacyMode) {
		val message = "New code path expects $flagName to be enabled."
		Log.wtf("RefactorFlag", message, IllegalStateException(message))
		}
		return inLegacyMode
		}

		/**
		* Called to ensure code is only run when the flag is disabled. This will throw an exception if
		* the flag is enabled to ensure that the refactor author catches issues in testing.
		*
		* Example usage:
		* ```
		* public void setSomeLegacyController(SomeController someController) {
		* SomeRefactor.assertInLegacyMode();
		* mSomeController = someController;
		* }
		* ````
		*/
		inline fun assertInLegacyMode(isEnabled: Boolean, flagName: Any) =
		check(!isEnabled) { "Legacy code path not supported when $flagName is enabled." }
		}

packages/SystemUI/src/com/android/systemui/statusbar/notification/footer/shared/FooterViewRefactor.kt

0 → 100644

+47 −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.systemui.statusbar.notification.footer.shared

		import com.android.systemui.Flags
		import com.android.systemui.flags.RefactorFlagUtils

		/** Helper for reading or using the FooterView refactor flag state. */
		@Suppress("NOTHING_TO_INLINE")
		object FooterViewRefactor {
		const val FLAG_NAME = Flags.FLAG_NOTIFICATIONS_FOOTER_VIEW_REFACTOR

		/** Is the refactor enabled */
		@JvmStatic
		inline val isEnabled
		get() = Flags.notificationsFooterViewRefactor()

		/**
		* Called to ensure code is only run when the flag is enabled. This protects users from the
		* unintended behaviors caused by accidentally running new logic, while also crashing on an eng
		* build to ensure that the refactor author catches issues in testing.
		*/
		@JvmStatic
		inline fun isUnexpectedlyInLegacyMode() =
		RefactorFlagUtils.isUnexpectedlyInLegacyMode(isEnabled, FLAG_NAME)

		/**
		* Called to ensure code is only run when the flag is disabled. This will throw an exception if
		* the flag is enabled to ensure that the refactor author catches issues in testing.
		*/
		@JvmStatic
		inline fun assertInLegacyMode() = RefactorFlagUtils.assertInLegacyMode(isEnabled, FLAG_NAME)
		}