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Timeline: avoid overflow on getViewType

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This commit is contained in:
ganfra 2022-02-01 20:31:09 +01:00
parent 50810065a2
commit cfda76b2d4
1 changed files with 3 additions and 6 deletions
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9
vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/BaseEventItem.kt
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@ -26,8 +26,6 @@ import im.vector.app.R
import im.vector.app.core.epoxy.VectorEpoxyHolder
import im.vector.app.core.epoxy.VectorEpoxyModel
import im.vector.app.core.platform.CheckableView
import im.vector.app.core.utils.DimensionConverter
import timber.log.Timber
/**
* Children must override getViewType()
@ -43,15 +41,14 @@ abstract class BaseEventItem<H : BaseEventItem.BaseHolder> : VectorEpoxyModel<H>
final override fun getViewType(): Int {
// This makes sure we have a unique integer for the combination of layout and ViewStubId.
return pairingFunction(layout, getViewStubId()).also {
Timber.v("GetViewType: for ${javaClass.canonicalName} $it with layout:$layout and stubId:${getViewStubId()}")
}
val pairingResult = pairingFunction(layout.toLong(), getViewStubId().toLong())
return (pairingResult - Int.MAX_VALUE).toInt()
}
abstract fun getViewStubId(): Int
// Szudzik function
private fun pairingFunction(a: Int, b: Int): Int {
private fun pairingFunction(a: Long, b: Long): Long {
return if (a >= b) a * a + a + b else a + b * b
}