IssueTracker

Definitely want to support this. Currently investigating moving the Callbacks to interfaces so that wrapping/conversion can be done:

    private abstract class WrapperDataSource<in A, B>(private val source: PositionalDataSource<A>)
            : PositionalDataSource<B>() {
        override fun loadInitial(params: LoadInitialParams, callback: LoadInitialCallback<B>) {
            source.loadInitial(params, object: LoadInitialCallback<A> {
                override fun onResult(data: List<A>, position: Int, totalCount: Int) {
                    callback.onResult(convert(data), position, totalCount)
                }

                override fun onResult(data: List<A>, position: Int) {
                    callback.onResult(convert(data), position)
                }
            })
        }

        override fun loadRange(params: LoadRangeParams, callback: LoadRangeCallback<B>) {
            source.loadRange(params) { data -> callback.onResult(convert(data)) }
        }

        protected abstract fun convert(source: List<A>): List<B>
    }

Making them interfaces makes it easy to wrap/test. Downside is that external callers can't use some of the guts of the callback impl (like validating non-negative positions), but this should make it much more reasonable to wrap, decorate, or otherwise post-process data loaded from e.g. Room. In the network case, the equivalent might be post-processing a network request in a way that's awkward to inject into network loading code.

Fixed internally by making Params constructors public, and Callbacks abstract. Will go out with next alpha release.

We're also investigating making it easier to wrap and do decoration/type conversions, since the example in #2 mostly works, but is incomplete - it needs to handle invalidates.

Released: https://developer.android.com/topic/libraries/architecture/release-notes.html#paging

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

commit 01142ddd5b14eb33e5145c4e72e6619a5c100fe4
Author: Shahd AbuDaghash <shahddaghash@google.com>
Date:   Thu Dec 21 12:34:00 2023

    Introduce Overscroll in AnchoredDraggable
   
    Adding overscroll support to AnchoredDraggable by giving the ability to pass a customized overscrollEffect object to AnchoredDraggable.
   
    Bug: 288084801
    Relnote: An OverscrollEffect has been introduced to allow for custom overscroll effects in anchoredDraggable. To retrieve the consumed velocity after animation, the consumed velocity is returned from the settle function.
    Test: Added tests to verify behavior
    Change-Id: I100683fe7473b1e5ff317ab22245a2b0a25bd549

M       compose/foundation/foundation/api/current.txt
M       compose/foundation/foundation/api/restricted_current.txt
M       compose/foundation/foundation/integration-tests/foundation-demos/src/main/java/androidx/compose/foundation/demos/AnchoredDraggableDemo.kt
M       compose/foundation/foundation/samples/src/main/java/androidx/compose/foundation/samples/AnchoredDraggableSample.kt
A       compose/foundation/foundation/src/androidInstrumentedTest/kotlin/androidx/compose/foundation/anchoredDraggable/AnchoredDraggableOverscrollTest.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/AnchoredDraggable.kt

https://android-review.googlesource.com/2888106

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

commit 0f071d797bccf7eff2a23e408928ca76640af782
Author: Shahd AbuDaghash <shahddaghash@google.com>
Date:   Wed Nov 29 18:34:09 2023

    Migrates AnchoredDraggable to Modifier.Node
   
    Migrates AnchoredDraggable to Modifier.Node. This helps in adding Overscroll effect in AnchoredDraggable.
   
    Bug: 288084801
    Test: Added tests to verify behavior
    Change-Id: I3f3338cd71763972c4b70f2e06c97e85285b0035

M       compose/foundation/foundation/src/androidInstrumentedTest/kotlin/androidx/compose/foundation/anchoredDraggable/AnchoredDraggableGestureTest.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/AnchoredDraggable.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/Draggable.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/Draggable2D.kt

https://android-review.googlesource.com/2852691