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Timeline: update state management

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This commit is contained in:
ganfra 2019-09-23 17:43:37 +02:00
parent b6e18e4a8f
commit f6d34ec7fd
4 changed files with 90 additions and 102 deletions
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2
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/database/mapper/TimelineEventMapper.kt
View file

@ -46,7 +46,7 @@ internal class TimelineEventMapper @Inject constructor(private val readReceiptsS
readReceipts = readReceipts?.sortedByDescending {
it.originServerTs
} ?: emptyList(),
hasReadMarker = timelineEventEntity.readMarker?.eventId?.isEmpty() == false
hasReadMarker = timelineEventEntity.readMarker?.eventId?.isNotEmpty() == true
)
}

186
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/room/timeline/DefaultTimeline.kt
View file

@ -18,7 +18,6 @@ package im.vector.matrix.android.internal.session.room.timeline
import im.vector.matrix.android.api.MatrixCallback
import im.vector.matrix.android.api.session.crypto.CryptoService
import im.vector.matrix.android.api.session.events.model.EventType
import im.vector.matrix.android.api.session.room.model.ReadReceipt
import im.vector.matrix.android.api.session.room.send.SendState
import im.vector.matrix.android.api.session.room.timeline.Timeline
@ -37,8 +36,6 @@ import im.vector.matrix.android.internal.database.model.TimelineEventEntity
import im.vector.matrix.android.internal.database.model.TimelineEventEntityFields
import im.vector.matrix.android.internal.database.query.FilterContent
import im.vector.matrix.android.internal.database.query.findAllInRoomWithSendStates
import im.vector.matrix.android.internal.database.query.findIncludingEvent
import im.vector.matrix.android.internal.database.query.findLastLiveChunkFromRoom
import im.vector.matrix.android.internal.database.query.where
import im.vector.matrix.android.internal.database.query.whereInRoom
import im.vector.matrix.android.internal.task.TaskConstraints
@ -109,8 +106,8 @@ internal class DefaultTimeline(
private var nextDisplayIndex: Int? = null
private val builtEvents = Collections.synchronizedList<TimelineEvent>(ArrayList())
private val builtEventsIdMap = Collections.synchronizedMap(HashMap<String, Int>())
private val backwardsPaginationState = AtomicReference(PaginationState())
private val forwardsPaginationState = AtomicReference(PaginationState())
private val backwardsState = AtomicReference(State())
private val forwardsState = AtomicReference(State())
private val timelineID = UUID.randomUUID().toString()
@ -126,43 +123,11 @@ internal class DefaultTimeline(
if (changeSet.state == OrderedCollectionChangeSet.State.INITIAL) {
handleInitialLoad()
} else {
// If changeSet has deletion we are having a gap, so we clear everything
if (changeSet.deletionRanges.isNotEmpty()) {
clearAllValues()
}
changeSet.insertionRanges.forEach { range ->
val (startDisplayIndex, direction) = if (range.startIndex == 0) {
Pair(filteredEvents[range.length - 1]!!.root!!.displayIndex, Timeline.Direction.FORWARDS)
} else {
Pair(filteredEvents[range.startIndex]!!.root!!.displayIndex, Timeline.Direction.BACKWARDS)
}
val state = getPaginationState(direction)
if (state.isPaginating) {
// We are getting new items from pagination
val shouldPostSnapshot = paginateInternal(startDisplayIndex, direction, state.requestedCount)
if (shouldPostSnapshot) {
postSnapshot()
}
} else {
// We are getting new items from sync
buildTimelineEvents(startDisplayIndex, direction, range.length.toLong())
postSnapshot()
}
}
var hasChanged = false
changeSet.changes.forEach { index ->
val eventEntity = results[index]
eventEntity?.eventId?.let { eventId ->
hasChanged = rebuildEvent(eventId) {
buildTimelineEvent(eventEntity)
} || hasChanged
}
}
if (hasChanged) postSnapshot()
handleUpdates(changeSet)
}
}
private val relationsListener = OrderedRealmCollectionChangeListener<RealmResults<EventAnnotationsSummaryEntity>> { collection, changeSet ->
var hasChange = false
@ -215,7 +180,6 @@ internal class DefaultTimeline(
backgroundRealm.set(realm)
clearUnlinkedEvents(realm)
roomEntity = RoomEntity.where(realm, roomId = roomId).findFirst()?.also {
it.sendingTimelineEvents.addChangeListener { _ ->
postSnapshot()
@ -356,29 +320,29 @@ internal class DefaultTimeline(
} ?: false
}
private fun hasMoreInCache(direction: Timeline.Direction): Boolean {
return Realm.getInstance(realmConfiguration).use { localRealm ->
val timelineEventEntity = buildEventQuery(localRealm).findFirst(direction)
?: return false
if (direction == Timeline.Direction.FORWARDS) {
val firstEvent = builtEvents.firstOrNull() ?: return true
firstEvent.displayIndex < timelineEventEntity.root!!.displayIndex
} else {
val lastEvent = builtEvents.lastOrNull() ?: return true
lastEvent.displayIndex > timelineEventEntity.root!!.displayIndex
}
}
}
private fun hasMoreInCache(direction: Timeline.Direction) = getState(direction).hasMoreInCache
private fun hasReachedEnd(direction: Timeline.Direction): Boolean {
return Realm.getInstance(realmConfiguration).use { localRealm ->
val currentChunk = findCurrentChunk(localRealm) ?: return false
if (direction == Timeline.Direction.FORWARDS) {
currentChunk.isLastForward
} else {
val eventEntity = buildEventQuery(localRealm).findFirst(direction)
currentChunk.isLastBackward || eventEntity?.root?.type == EventType.STATE_ROOM_CREATE
}
private fun hasReachedEnd(direction: Timeline.Direction) = getState(direction).hasReachedEnd
private fun updateLoadingStates(results: RealmResults<TimelineEventEntity>) {
val lastCacheEvent = results.lastOrNull()
val lastBuiltEvent = builtEvents.lastOrNull()
val firstCacheEvent = results.firstOrNull()
val firstBuiltEvent = builtEvents.firstOrNull()
val chunkEntity = getLiveChunk()
updateState(Timeline.Direction.FORWARDS) {
it.copy(
hasMoreInCache = firstBuiltEvent == null || firstBuiltEvent.displayIndex < firstCacheEvent?.root?.displayIndex ?: Int.MIN_VALUE,
hasReachedEnd = chunkEntity?.isLastForward ?: false
)
}
updateState(Timeline.Direction.BACKWARDS) {
it.copy(
hasMoreInCache = lastBuiltEvent == null || lastBuiltEvent.displayIndex > lastCacheEvent?.root?.displayIndex ?: Int.MAX_VALUE,
hasReachedEnd = chunkEntity?.isLastBackward ?: false
)
}
}
@ -391,16 +355,16 @@ internal class DefaultTimeline(
direction: Timeline.Direction,
count: Int,
strict: Boolean = false): Boolean {
updatePaginationState(direction) { it.copy(requestedCount = count, isPaginating = true) }
updateState(direction) { it.copy(requestedPaginationCount = count, isPaginating = true) }
val builtCount = buildTimelineEvents(startDisplayIndex, direction, count.toLong(), strict)
val shouldFetchMore = builtCount < count && !hasReachedEnd(direction)
if (shouldFetchMore) {
val newRequestedCount = count - builtCount
updatePaginationState(direction) { it.copy(requestedCount = newRequestedCount) }
updateState(direction) { it.copy(requestedPaginationCount = newRequestedCount) }
val fetchingCount = max(MIN_FETCHING_COUNT, newRequestedCount)
executePaginationTask(direction, fetchingCount)
} else {
updatePaginationState(direction) { it.copy(isPaginating = false, requestedCount = 0) }
updateState(direction) { it.copy(isPaginating = false, requestedPaginationCount = 0) }
}
return !shouldFetchMore
@ -412,7 +376,7 @@ internal class DefaultTimeline(
private fun buildSendingEvents(): List<TimelineEvent> {
val sendingEvents = ArrayList<TimelineEvent>()
if (hasReachedEnd(Timeline.Direction.FORWARDS)) {
if (hasReachedEnd(Timeline.Direction.FORWARDS) && !hasMoreInCache(Timeline.Direction.FORWARDS)) {
roomEntity?.sendingTimelineEvents
?.where()
?.filterEventsWithSettings()
@ -425,20 +389,20 @@ internal class DefaultTimeline(
}
private fun canPaginate(direction: Timeline.Direction): Boolean {
return isReady.get() && !getPaginationState(direction).isPaginating && hasMoreToLoad(direction)
return isReady.get() && !getState(direction).isPaginating && hasMoreToLoad(direction)
}
private fun getPaginationState(direction: Timeline.Direction): PaginationState {
private fun getState(direction: Timeline.Direction): State {
return when (direction) {
Timeline.Direction.FORWARDS -> forwardsPaginationState.get()
Timeline.Direction.BACKWARDS -> backwardsPaginationState.get()
Timeline.Direction.FORWARDS -> forwardsState.get()
Timeline.Direction.BACKWARDS -> backwardsState.get()
}
}
private fun updatePaginationState(direction: Timeline.Direction, update: (PaginationState) -> PaginationState) {
private fun updateState(direction: Timeline.Direction, update: (State) -> State) {
val stateReference = when (direction) {
Timeline.Direction.FORWARDS -> forwardsPaginationState
Timeline.Direction.BACKWARDS -> backwardsPaginationState
Timeline.Direction.FORWARDS -> forwardsState
Timeline.Direction.BACKWARDS -> backwardsState
}
val currentValue = stateReference.get()
val newValue = update(currentValue)
@ -477,13 +441,51 @@ internal class DefaultTimeline(
postSnapshot()
}
/**
* This has to be called on TimelineThread as it access realm live results
*/
private fun handleUpdates(changeSet: OrderedCollectionChangeSet) {
// If changeSet has deletion we are having a gap, so we clear everything
if (changeSet.deletionRanges.isNotEmpty()) {
clearAllValues()
}
var postSnapshot = false
changeSet.insertionRanges.forEach { range ->
val (startDisplayIndex, direction) = if (range.startIndex == 0) {
Pair(filteredEvents[range.length - 1]!!.root!!.displayIndex, Timeline.Direction.FORWARDS)
} else {
Pair(filteredEvents[range.startIndex]!!.root!!.displayIndex, Timeline.Direction.BACKWARDS)
}
val state = getState(direction)
if (state.isPaginating) {
// We are getting new items from pagination
postSnapshot = paginateInternal(startDisplayIndex, direction, state.requestedPaginationCount)
} else {
// We are getting new items from sync
buildTimelineEvents(startDisplayIndex, direction, range.length.toLong())
postSnapshot = true
}
}
changeSet.changes.forEach { index ->
val eventEntity = filteredEvents[index]
eventEntity?.eventId?.let { eventId ->
postSnapshot = rebuildEvent(eventId) {
buildTimelineEvent(eventEntity)
} || postSnapshot
}
}
if (postSnapshot) {
postSnapshot()
}
}
/**
* This has to be called on TimelineThread as it access realm live results
*/
private fun executePaginationTask(direction: Timeline.Direction, limit: Int) {
val token = getTokenLive(direction)
if (token == null) {
updatePaginationState(direction) { it.copy(isPaginating = false, requestedCount = 0) }
updateState(direction) { it.copy(isPaginating = false, requestedPaginationCount = 0) }
return
}
val params = PaginationTask.Params(roomId = roomId,
@ -622,15 +624,6 @@ internal class DefaultTimeline(
}
}
private fun findCurrentChunk(realm: Realm): ChunkEntity? {
val currentInitialEventId = initialEventId
return if (currentInitialEventId == null) {
ChunkEntity.findLastLiveChunkFromRoom(realm, roomId)
} else {
ChunkEntity.findIncludingEvent(realm, currentInitialEventId)
}
}
private fun clearUnlinkedEvents(realm: Realm) {
realm.executeTransaction {
val unlinkedChunks = ChunkEntity
@ -651,6 +644,7 @@ internal class DefaultTimeline(
if (isReady.get().not()) {
return@post
}
updateLoadingStates(filteredEvents)
val snapshot = createSnapshot()
val runnable = Runnable { listener?.onUpdated(snapshot) }
debouncer.debounce("post_snapshot", runnable, 50)
@ -662,8 +656,8 @@ internal class DefaultTimeline(
nextDisplayIndex = null
builtEvents.clear()
builtEventsIdMap.clear()
backwardsPaginationState.set(PaginationState())
forwardsPaginationState.set(PaginationState())
backwardsState.set(State())
forwardsState.set(State())
}
@ -673,16 +667,6 @@ internal class DefaultTimeline(
return if (this == Timeline.Direction.BACKWARDS) PaginationDirection.BACKWARDS else PaginationDirection.FORWARDS
}
private fun RealmQuery<TimelineEventEntity>.findFirst(direction: Timeline.Direction): TimelineEventEntity? {
return if (direction == Timeline.Direction.FORWARDS) {
sort(TimelineEventEntityFields.ROOT.DISPLAY_INDEX, Sort.DESCENDING)
} else {
sort(TimelineEventEntityFields.ROOT.DISPLAY_INDEX, Sort.ASCENDING)
}
.filterEventsWithSettings()
.findFirst()
}
private fun RealmQuery<TimelineEventEntity>.filterEventsWithSettings(): RealmQuery<TimelineEventEntity> {
if (settings.filterTypes) {
`in`(TimelineEventEntityFields.ROOT.TYPE, settings.allowedTypes.toTypedArray())
@ -693,9 +677,13 @@ internal class DefaultTimeline(
return this
}
private data class State(
val hasReachedEnd: Boolean = false,
val hasMoreInCache: Boolean = true,
val isPaginating: Boolean = false,
val requestedPaginationCount: Int = 0
)
}
private data class PaginationState(
val isPaginating: Boolean = false,
val requestedCount: Int = 0
)

2
vector/src/main/java/im/vector/riotx/features/home/room/detail/RoomDetailFragment.kt
View file

@ -532,7 +532,7 @@ class RoomDetailFragment :
private fun updateJumpToBottomViewVisibility() {
debouncer.debounce("jump_to_bottom_visibility", 250, Runnable {
Timber.v("First visible: ${layoutManager.findFirstCompletelyVisibleItemPosition()}")
if (layoutManager.findFirstCompletelyVisibleItemPosition() != 0) {
if (layoutManager.findFirstVisibleItemPosition() != 0) {
jumpToBottomView.show()
} else {
jumpToBottomView.hide()

2
vector/src/main/java/im/vector/riotx/features/home/room/detail/ScrollOnNewMessageCallback.kt
View file

@ -26,7 +26,7 @@ class ScrollOnNewMessageCallback(private val layoutManager: LinearLayoutManager,
override fun onInserted(position: Int, count: Int) {
Timber.v("On inserted $count count at position: $position")
if (position == 0 && layoutManager.findFirstCompletelyVisibleItemPosition() == 0 && !timelineEventController.isLoadingForward()) {
if (position == 0 && layoutManager.findFirstVisibleItemPosition() == 0 && !timelineEventController.isLoadingForward()) {
layoutManager.scrollToPosition(0)
}
}