-
Notifications
You must be signed in to change notification settings - Fork 952
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Summary: as tile Reviewed By: zielinskimz Differential Revision: D52253410 fbshipit-source-id: 9a1b00a1885c5ea25642327646133fdb3648f3de
- Loading branch information
1 parent
7360984
commit 85ed1ab
Showing
4 changed files
with
146 additions
and
29 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
113 changes: 113 additions & 0 deletions
113
...se/src/main/java/facebook/internal/androidx/compose/ui/inspection/RecompositionHandler.kt
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| /* | ||
| * Copyright 2022 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 facebook.internal.androidx.compose.ui.inspection | ||
|
|
||
| import android.util.Log | ||
| import androidx.annotation.GuardedBy | ||
| import androidx.compose.runtime.Composer | ||
| import androidx.inspection.ArtTooling | ||
|
|
||
| private const val START_RESTART_GROUP = "startRestartGroup(I)Landroidx/compose/runtime/Composer;" | ||
| private const val SKIP_TO_GROUP_END = "skipToGroupEnd()V" | ||
|
|
||
| /** Detection of recompose counts and skips from installing runtime hooks. */ | ||
| class RecompositionHandler(private val artTooling: ArtTooling) { | ||
|
|
||
| /** For each composable store the recomposition [count] and [skips]. */ | ||
| class Data(var count: Int, var skips: Int) | ||
|
|
||
| /** | ||
| * Key of a Composable method. | ||
| * | ||
| * The [key] identified the runtime method and the [anchorId] identified a specific compose node. | ||
| */ | ||
| private data class MethodKey(val key: Int, val anchorId: Int) | ||
|
|
||
| private val lock = Any() | ||
| @GuardedBy("lock") private var currentlyCollecting = false | ||
| @GuardedBy("lock") private var hooksInstalled = false | ||
| @GuardedBy("lock") private val counts = mutableMapOf<MethodKey, Data>() | ||
| @GuardedBy("lock") private var lastMethodKey: Int = 0 | ||
|
|
||
| fun changeCollectionMode(startCollecting: Boolean, keepCounts: Boolean) { | ||
| synchronized(lock) { | ||
| if (startCollecting != currentlyCollecting) { | ||
| if (!hooksInstalled) { | ||
| installHooks() | ||
| } | ||
| currentlyCollecting = startCollecting | ||
| } | ||
| if (!keepCounts) { | ||
| counts.clear() | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fun getCounts(key: Int, anchorId: Int): Data? { | ||
| synchronized(lock) { | ||
| return counts[MethodKey(key, anchorId)] | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * We install 3 hooks: | ||
| * - entry hook for ComposerImpl.startRestartGroup gives us the [MethodKey.key] | ||
| * - exit hook for ComposerImpl.startRestartGroup gives us the [MethodKey.anchorId] | ||
| * - entry hook for ComposerImpl.skipToGroupEnd converts a recompose count to a skip count. | ||
| */ | ||
| private fun installHooks() { | ||
| val composerImpl = | ||
| try { | ||
| Class.forName("${Composer::class.java.name}Impl") | ||
| } catch (ex: Throwable) { | ||
| Log.w("Compose", "Could not install recomposition hooks", ex) | ||
| return | ||
| } | ||
|
|
||
| artTooling.registerEntryHook(composerImpl, START_RESTART_GROUP) { _, args -> | ||
| synchronized(lock) { lastMethodKey = args[0] as Int } | ||
| } | ||
|
|
||
| artTooling.registerExitHook(composerImpl, START_RESTART_GROUP) { composer: Composer -> | ||
| synchronized(lock) { | ||
| if (currentlyCollecting) { | ||
| composer.recomposeScopeIdentity?.hashCode()?.let { anchor -> | ||
| val data = counts.getOrPut(MethodKey(lastMethodKey, anchor)) { Data(0, 0) } | ||
| data.count++ | ||
| } | ||
| } | ||
| } | ||
| composer | ||
| } | ||
|
|
||
| artTooling.registerEntryHook(composerImpl, SKIP_TO_GROUP_END) { obj, _ -> | ||
| synchronized(lock) { | ||
| if (currentlyCollecting) { | ||
| val composer = obj as? Composer | ||
| composer?.recomposeScopeIdentity?.hashCode()?.let { anchor -> | ||
| counts[MethodKey(lastMethodKey, anchor)]?.let { | ||
| it.count-- | ||
| it.skips++ | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| hooksInstalled = true | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters