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Fix BrowseSourceController losing scroll position when navigating back

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This commit is contained in:
arkon 2020-04-27 16:21:23 -04:00
parent 850654dccc
commit 2a41e4ce68
3 changed files with 8 additions and 18 deletions
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2
app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt
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@ -14,7 +14,6 @@ import eu.kanade.tachiyomi.data.preference.PreferenceKeys as Keys
import eu.kanade.tachiyomi.data.preference.PreferenceValues as Values
import eu.kanade.tachiyomi.data.track.TrackService
import eu.kanade.tachiyomi.data.track.anilist.Anilist
import eu.kanade.tachiyomi.util.lang.startWithCurrentValue
import java.io.File
import java.text.DateFormat
import java.text.SimpleDateFormat
@ -29,7 +28,6 @@ fun <T> RxPreference<T>.getOrDefault(): T = get() ?: defaultValue()!!
fun <T> Preference<T>.asImmediateFlow(block: (value: T) -> Unit): Flow<T> {
block(get())
return asFlow()
.startWithCurrentValue { get() }
.onEach { block(it) }
}

15
app/src/main/java/eu/kanade/tachiyomi/ui/source/browse/BrowseSourceController.kt
View File

@ -48,6 +48,7 @@ import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.Job
import kotlinx.coroutines.cancel
import kotlinx.coroutines.flow.drop
import kotlinx.coroutines.flow.filter
import kotlinx.coroutines.flow.launchIn
import kotlinx.coroutines.flow.onEach
@ -190,12 +191,12 @@ open class BrowseSourceController(bundle: Bundle) :
} else {
(binding.catalogueView.inflate(R.layout.source_recycler_autofit) as AutofitRecyclerView).apply {
numColumnsScope = CoroutineScope(Job() + Dispatchers.Main)
getColumnsPreferenceForCurrentOrientation().asImmediateFlow {
spanCount = it
// Set the adapter again to recalculate the covers height
adapter = this@BrowseSourceController.adapter
}
getColumnsPreferenceForCurrentOrientation().asImmediateFlow { spanCount = it }
.drop(1)
.onEach {
// Set the adapter again to recalculate the covers height
adapter = this@BrowseSourceController.adapter
}
.launchIn(numColumnsScope!!)
(layoutManager as GridLayoutManager).spanSizeLookup = object : GridLayoutManager.SpanSizeLookup() {
@ -452,7 +453,7 @@ open class BrowseSourceController(bundle: Bundle) :
*
* @return the preference.
*/
fun getColumnsPreferenceForCurrentOrientation(): Preference<Int> {
private fun getColumnsPreferenceForCurrentOrientation(): Preference<Int> {
return if (resources?.configuration?.orientation == Configuration.ORIENTATION_PORTRAIT) {
preferences.portraitColumns()
} else {

9
app/src/main/java/eu/kanade/tachiyomi/util/lang/CoroutinesExtensions.kt
View File

@ -6,8 +6,6 @@ import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.Job
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.onStart
import kotlinx.coroutines.launch
fun launchUI(block: suspend CoroutineScope.() -> Unit): Job =
@ -19,10 +17,3 @@ fun launchIO(block: suspend CoroutineScope.() -> Unit): Job =
@OptIn(ExperimentalCoroutinesApi::class)
fun launchNow(block: suspend CoroutineScope.() -> Unit): Job =
GlobalScope.launch(Dispatchers.Main, CoroutineStart.UNDISPATCHED, block)
@OptIn(ExperimentalCoroutinesApi::class)
fun <T> Flow<T>.startWithCurrentValue(block: () -> T?): Flow<T> {
return onStart {
block()?.let { emit(it) }
}
}