Suspending gesture detecting functions should be combinable [181577176]

WAI

Bug

Status Update

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Description

da...@danielzfranklin.org

created issue #1

Mar 1, 2021 08:15PM

I had code that required detecting a number of different gestures that were possible only in certain states. I started off using the gesture detecting functions and global variables like so:

var isInTurn = false
var isInSelect = false

detectDragGesturesAfterLongPress { change, _ ->
    if (!isInTurn) {
        isInSelect = true
        /* ... */
    }
}

detectDragGestures { change, _ ->
    if (!isInSelect) {
        isInTurn = true
        /* ... */
    }
}
// ...

I eventually traced a number of bugs down to updating the state non-atomically, so I was planning to add a mutex. That reminded me of how coroutines can often be used to solve concurrency issues, and I came up with

while (true) {
    val event = awaitPointerEventScope { awaitFirstDown() }

    when {
        isStartOfTurn(event) ->
            awaitTurnOrCancel(event)

        isStartOfSelect(event) ->
            awaitSelectOrCancel(event)

        // ...
    }
}

I defined a bunch of my own functions on PointerInputScope, and the approach solved my concurrency issues in a relatively clean way.

The problem is that most of the framework detectors block forever, so they can't be combined. I ended up copying a framework function, editing it to remove the line forEachGesture {, and copying over all their private/internal dependencies.

I'm suggesting that framework gesture detector functions should (when it makes sense) delegate to another public function that detects only one gesture.

fun detectDragGesturesAfterLongPress(/* ... */) {
   forEachGesture {
      detectOneDragGestureAfterLongPress(/* ... */)
    }
}

fun detectOneDragGestureAfterLongPress(/* ... */)

I'm also suggesting that more of the private helpers you use in gesture detection be made public, such as awaitLongPressOrCancellation, to enable users to write code that combines small suspending functions to detect complex gestures as cleanly as the framework.

Comments

ma...@google.com <ma...@google.com> #2Mar 2, 2021 02:33PM

Status: Won't Fix (Intended Behavior)

Project: platform/frameworks/support
Branch: androidx-main

commit 0154910724cdc44253af1d2f8cede76264783226
Author: Aurimas Liutikas <aurimas@google.com>
Date: Thu Jun 27 15:25:02 2024

Expand native target support for annotation and collection libraries

- Enable watchos and tvos download in importMaven
- Add support for watchos and tvos targets in AndroidXMultiplatformExtension
- Enable watchos and tvos in :annotation:annotation
- Enable linuxArm64, watchos, and tvos in :collection:collection

This work is required as we work towards setting up native stubs for
compose projects.

Test: ./gradlew collection:collection:publish
Bug: 349894318
Change-Id: Idfd1faa3a826bb91ee14722f7437bdcf99cf0018

M annotation/annotation/build.gradle
M buildSrc/private/src/main/kotlin/androidx/build/AndroidXMultiplatformExtension.kt
M buildSrc/public/src/main/kotlin/androidx/build/KmpPlatforms.kt
M collection/collection/build.gradle
M development/build_log_simplifier/messages.ignore
M development/importMaven/src/main/kotlin/androidx/build/importMaven/KmpConfig.kt

https://android-review.googlesource.com/3151736

da...@danielzfranklin.org <da...@danielzfranklin.org> #3Mar 2, 2021 04:07PM

Project: platform/frameworks/support
Branch: androidx-main

commit 39cd1e9f7579513bde139c17f9c51f9012d56152
Author: Aurimas Liutikas <aurimas@google.com>
Date: Thu Jun 27 15:25:02 2024

Expand native target support for annotation and collection libraries

Reland

r.android.com/3151736 now with workaround for

https://youtrack.jetbrains.com/issue/KT-62653

- Enable watchos and tvos download in importMaven
- Add support for watchos and tvos targets in AndroidXMultiplatformExtension
- Enable watchos and tvos in :annotation:annotation
- Enable linuxArm64, watchos, and tvos in :collection:collection

This work is required as we work towards setting up native stubs for
compose projects.

Test: ./gradlew collection:collection:publish
Bug: 349894318
Change-Id: Ic795af8486db48b31633799e06665717d08398db

M annotation/annotation/build.gradle
M buildSrc/private/src/main/kotlin/androidx/build/AndroidXMultiplatformExtension.kt
M buildSrc/public/src/main/kotlin/androidx/build/KmpPlatforms.kt
M collection/collection/build.gradle
M development/build_log_simplifier/messages.ignore
M development/importMaven/src/main/kotlin/androidx/build/importMaven/KmpConfig.kt

https://android-review.googlesource.com/3156121

ma...@google.com <ma...@google.com> #4Mar 3, 2021 04:07PM

Project: platform/frameworks/support
Branch: androidx-main

commit c3a06e79cf427aef1cf0ede1bacb463eb89472be
Author: Aurimas Liutikas <aurimas@google.com>
Date: Thu Jun 27 15:25:02 2024

Expand native target support for annotation and collection libraries

Reland

r.android.com/3151736 /

r.android.com/3156121 but now with
moving to project(":annotation:annotation") in commonMain as due to

https://youtrack.jetbrains.com/issue/KT-62653 we cannot depend on
project in one source set and prebuilt in the other.

- Enable watchos and tvos download in importMaven
- Add support for watchos and tvos targets in AndroidXMultiplatformExtension
- Enable watchos and tvos in :annotation:annotation
- Enable linuxArm64, watchos, and tvos in :collection:collection

This work is required as we work towards setting up native stubs for
compose projects.

Test: ./gradlew collection:collection:publish
Bug: 349894318
Change-Id: I7f2a1bddbe79ab5e920cdb01ca6a428950a8c2c3

M annotation/annotation/build.gradle
M buildSrc/private/src/main/kotlin/androidx/build/AndroidXMultiplatformExtension.kt
M buildSrc/public/src/main/kotlin/androidx/build/KmpPlatforms.kt
M busytown/androidx_multiplatform_mac_host_tests_arm64.sh
M camera/integration-tests/avsynctestapp/build.gradle
M collection/collection/build.gradle
M development/build_log_simplifier/messages.ignore
M development/importMaven/src/main/kotlin/androidx/build/importMaven/KmpConfig.kt
M test/uiautomator/integration-tests/testapp/build.gradle
M wear/compose/integration-tests/navigation/build.gradle

https://android-review.googlesource.com/3156423

ap...@google.com <ap...@google.com> #5Aug 12, 2022 06:10PM

Project: platform/frameworks/support
Branch: androidx-main

commit c56a2faf24c82bf961cb10440156745bf3cf30bd
Author: Aurimas Liutikas <aurimas@google.com>
Date: Wed Jul 03 11:10:40 2024

Add linuxX64Stubs for compose runtime libraries

- Add support for linuxX64Stubs
- Add these linuxX64Stubs to compose runtime projects
- Move OperationsTest from commonTest to jvmTest as it has
jvm-reflection usages

Bug: 349894318
Test: ./gradlew -p compose/runtime build
Change-Id: Ia600fafb174b585cf5a0d7a7f3c3726d10b4cc92

M buildSrc/private/src/main/kotlin/androidx/build/AndroidXMultiplatformExtension.kt
M buildSrc/public/src/main/kotlin/androidx/build/KmpPlatforms.kt
M compose/runtime/runtime-saveable/build.gradle
M compose/runtime/runtime-test-utils/build.gradle
A compose/runtime/runtime-test-utils/src/commonMain/kotlin/androidx/compose/runtime/mock/SynchronizedObject.kt
M compose/runtime/runtime-test-utils/src/commonMain/kotlin/androidx/compose/runtime/mock/TestMonotonicFrameClock.kt
A compose/runtime/runtime-test-utils/src/jvmMain/kotlin/androidx/compose/runtime/mock/SynchronizedObject.jvm.kt
A compose/runtime/runtime-test-utils/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/mock/SynchronizedObject.linuxx64Stubs.kt
M compose/runtime/runtime/build.gradle
M compose/runtime/runtime/src/commonMain/kotlin/androidx/compose/runtime/Stack.kt
M compose/runtime/runtime/src/commonMain/kotlin/androidx/compose/runtime/collection/ScopeMap.kt
M compose/runtime/runtime/src/commonMain/kotlin/androidx/compose/runtime/snapshots/SnapshotStateSet.kt
M compose/runtime/runtime/src/commonTest/kotlin/androidx/compose/runtime/CompositionTestExtensions.kt
M compose/runtime/runtime/src/jvmTest/kotlin/androidx/compose/runtime/changelist/OperationsTest.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/MonotonicFrameClock.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/NotImplemented.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/SynchronizedObject.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/TestOnly.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/internal/Atomic.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/internal/ComposableLambda.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/internal/JvmDefaultWithCompatibility.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/internal/Thread.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/internal/Utils.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/internal/WeakReference.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsMain/kotlin/androidx/compose/runtime/snapshots/SnapshotContextElement.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsTest/kotlin/kotlinx/test/IgnoreAndroidUnitTestTarget.linuxx64Stubs.kt
A compose/runtime/runtime/src/linuxx64StubsTest/kotlin/kotlinx/test/IgnoreJsTarget.linuxx64Stubs.kt

https://android-review.googlesource.com/3159861

je...@google.com <je...@google.com> #6Aug 12, 2022 07:45PM

Project: platform/frameworks/support
Branch: androidx-main

commit 2363176cf646e7eb7647fcda7186746757fa9353
Author: Aurimas Liutikas <aurimas@google.com>
Date: Mon Jul 08 10:48:51 2024

Convert first batch of compose ui projects to add linuxX64Stubs target

- Disable running linuxx64StubsTest, as they are not representative
of a real environment
- Add all needed stub actuals

Bug: 349894318
Test: ./gradlew -p compose/ui build
Change-Id: I6abbf8d425714a1c6c492e5ea25897fe6f226584

M buildSrc/private/src/main/kotlin/androidx/build/AndroidXImplPlugin.kt
M buildSrc/private/src/main/kotlin/androidx/build/AndroidXMultiplatformExtension.kt
M compose/ui/ui-geometry/build.gradle
M compose/ui/ui-graphics/build.gradle
M compose/ui/ui-graphics/src/androidMain/kotlin/androidx/compose/ui/graphics/internal/JvmDefaultWithCompatibility.android.kt
M compose/ui/ui-graphics/src/commonMain/kotlin/androidx/compose/ui/graphics/Bezier.kt
M compose/ui/ui-graphics/src/commonMain/kotlin/androidx/compose/ui/graphics/Float16.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/BlendMode.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/Canvas.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/ColorFilter.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/ImageBitmap.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/NotImplemented.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/Paint.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/Path.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/PathEffect.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/PathIterator.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/PathMeasure.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/RenderEffect.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/Shader.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/TileMode.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/internal/JvmDefaultWithCompatibility.commonStubs.kt
M compose/ui/ui-graphics/src/commonStubsMain/kotlin/androidx/compose/ui/graphics/layer/GraphicsLayer.commonStubs.kt
M compose/ui/ui-graphics/src/commonTest/kotlin/androidx/compose/ui/graphics/vector/FastFloatParserTest.kt
M compose/ui/ui-unit/build.gradle
M compose/ui/ui-unit/src/commonMain/kotlin/androidx/compose/ui/unit/Constraints.kt
M compose/ui/ui-unit/src/commonMain/kotlin/androidx/compose/ui/unit/Dp.kt
M compose/ui/ui-unit/src/commonMain/kotlin/androidx/compose/ui/unit/IntOffset.kt
M compose/ui/ui-unit/src/linuxx64StubsMain/kotlin/androidx/compose/ui/unit/FontScaling.linuxx64Stubs.kt
M compose/ui/ui-unit/src/linuxx64StubsMain/kotlin/androidx/compose/ui/unit/internal/JvmDefaultWithCompatibility.linuxx64Stubs.kt
M compose/ui/ui-util/build.gradle
M compose/ui/ui-util/src/commonStubsMain/kotlin/androidx/compose/ui/util/NotImplemented.commonStubs.kt
M compose/ui/ui-util/src/commonStubsMain/kotlin/androidx/compose/ui/util/Trace.commonStubs.kt
M compose/ui/ui-util/src/linuxx64StubsMain/kotlin/androidx/compose/ui/util/InlineClassHelper.linuxx64Stubs.kt

https://android-review.googlesource.com/3163196

Issue 181577176