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https://github.com/Swiftgram/Telegram-iOS.git
synced 2025-12-22 22:25:57 +00:00
Move most of the batch fetching logic to a central place for ASTableView and ASCollectionView usage
This commit is contained in:
Michael Schneider
@@ -88,9 +88,7 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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- (instancetype)_initWithTableView:(ASTableView *)tableView;
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@end
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@interface ASTableView () <ASRangeControllerDataSource, ASRangeControllerDelegate,
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ASDataControllerSource, _ASTableViewCellDelegate,
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ASCellNodeLayoutDelegate, ASDelegateProxyInterceptor>
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@interface ASTableView () <ASRangeControllerDataSource, ASRangeControllerDelegate, ASDataControllerSource, _ASTableViewCellDelegate, ASCellNodeLayoutDelegate, ASDelegateProxyInterceptor, ASBatchFetchingScrollView>
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{
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ASTableViewProxy *_proxyDataSource;
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ASTableViewProxy *_proxyDelegate;
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@@ -524,8 +522,8 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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}
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}
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#pragma mark -
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#pragma mark Intercepted selectors
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#pragma mark - Intercepted selectors
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- (void)setTableHeaderView:(UIView *)tableHeaderView
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{
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@@ -579,75 +577,6 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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return [_dataController numberOfRowsInSection:section];
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}
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- (ASScrollDirection)scrollDirection
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{
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CGPoint scrollVelocity;
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if (self.isTracking) {
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scrollVelocity = [self.panGestureRecognizer velocityInView:self.superview];
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} else {
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scrollVelocity = _deceleratingVelocity;
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}
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ASScrollDirection scrollDirection = [self _scrollDirectionForVelocity:scrollVelocity];
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return ASScrollDirectionApplyTransform(scrollDirection, self.transform);
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}
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- (ASScrollDirection)scrollableDirections
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{
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ASScrollDirection scrollableDirection = ASScrollDirectionNone;
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CGFloat totalContentWidth = self.contentSize.width + self.contentInset.left + self.contentInset.right;
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CGFloat totalContentHeight = self.contentSize.height + self.contentInset.top + self.contentInset.bottom;
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if (self.alwaysBounceHorizontal || totalContentWidth > self.bounds.size.width) { // Can scroll horizontally.
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scrollableDirection |= ASScrollDirectionHorizontalDirections;
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}
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if (self.alwaysBounceVertical || totalContentHeight > self.bounds.size.height) { // Can scroll vertically.
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scrollableDirection |= ASScrollDirectionVerticalDirections;
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}
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return scrollableDirection;
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}
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- (ASScrollDirection)_scrollDirectionForVelocity:(CGPoint)scrollVelocity
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{
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ASScrollDirection direction = ASScrollDirectionNone;
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ASScrollDirection scrollableDirections = [self scrollableDirections];
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if (ASScrollDirectionContainsHorizontalDirection(scrollableDirections)) { // Can scroll horizontally.
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if (scrollVelocity.x < 0.0) {
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direction |= ASScrollDirectionRight;
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} else if (scrollVelocity.x > 0.0) {
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direction |= ASScrollDirectionLeft;
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}
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}
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if (ASScrollDirectionContainsVerticalDirection(scrollableDirections)) { // Can scroll vertically.
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if (scrollVelocity.y < 0.0) {
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direction |= ASScrollDirectionDown;
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} else if (scrollVelocity.y > 0.0) {
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direction |= ASScrollDirectionUp;
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}
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}
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return direction;
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}
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- (void)scrollViewDidScroll:(UIScrollView *)scrollView
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{
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// If a scroll happenes the current range mode needs to go to full
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ASInterfaceState interfaceState = [self interfaceStateForRangeController:_rangeController];
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if (ASInterfaceStateIncludesVisible(interfaceState)) {
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[_rangeController updateCurrentRangeWithMode:ASLayoutRangeModeFull];
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}
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for (_ASTableViewCell *tableCell in _cellsForVisibilityUpdates) {
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[[tableCell node] cellNodeVisibilityEvent:ASCellNodeVisibilityEventVisibleRectChanged
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inScrollView:scrollView
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withCellFrame:tableCell.frame];
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}
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if (_asyncDelegateImplementsScrollviewDidScroll) {
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[_asyncDelegate scrollViewDidScroll:scrollView];
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}
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}
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- (void)tableView:(UITableView *)tableView willDisplayCell:(_ASTableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
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{
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_pendingVisibleIndexPath = indexPath;
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@@ -700,16 +629,22 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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}
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#pragma mark - Batch Fetching
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- (void)_checkForBatchFetching
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- (void)scrollViewDidScroll:(UIScrollView *)scrollView
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{
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// Dragging will be handled in scrollViewWillEndDragging:withVelocity:targetContentOffset:
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if ([self isDragging] || [self isTracking]) {
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return;
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// If a scroll happenes the current range mode needs to go to full
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ASInterfaceState interfaceState = [self interfaceStateForRangeController:_rangeController];
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if (ASInterfaceStateIncludesVisible(interfaceState)) {
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[_rangeController updateCurrentRangeWithMode:ASLayoutRangeModeFull];
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}
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[self _beginBatchFetchingIfNeededForScrollDirection:[self scrollableDirections] contentOffset:self.contentOffset];
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for (_ASTableViewCell *tableCell in _cellsForVisibilityUpdates) {
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[[tableCell node] cellNodeVisibilityEvent:ASCellNodeVisibilityEventVisibleRectChanged
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inScrollView:scrollView
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withCellFrame:tableCell.frame];
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}
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if (_asyncDelegateImplementsScrollviewDidScroll) {
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[_asyncDelegate scrollViewDidScroll:scrollView];
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}
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}
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- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
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@@ -721,7 +656,7 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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if (targetContentOffset != NULL) {
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ASDisplayNodeAssert(_batchContext != nil, @"Batch context should exist");
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[self _beginBatchFetchingIfNeededForScrollDirection:[self scrollDirection] contentOffset:*targetContentOffset];
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[self _beginBatchFetchingIfNeededWithScrollView:self forScrollDirection:[self scrollDirection] contentOffset:*targetContentOffset];
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}
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if ([_asyncDelegate respondsToSelector:@selector(scrollViewWillEndDragging:withVelocity:targetContentOffset:)]) {
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@@ -729,19 +664,69 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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}
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}
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- (void)_beginBatchFetchingIfNeededForScrollDirection:(ASScrollDirection)scrollDirection contentOffset:(CGPoint)contentOffset
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#pragma mark - Scroll Direction
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- (ASScrollDirection)scrollDirection
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{
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if (![self _shouldBatchFetch]) {
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return;
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CGPoint scrollVelocity;
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if (self.isTracking) {
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scrollVelocity = [self.panGestureRecognizer velocityInView:self.superview];
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} else {
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scrollVelocity = _deceleratingVelocity;
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}
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// Check if we should batch fetch
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if (ASDisplayShouldFetchBatchForContext(_batchContext, [self scrollableDirections], self.bounds, self.contentSize, self.contentOffset, _leadingScreensForBatching)) {
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[self _beginBatchFetching];
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}
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ASScrollDirection scrollDirection = [self _scrollDirectionForVelocity:scrollVelocity];
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return ASScrollDirectionApplyTransform(scrollDirection, self.transform);
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}
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- (BOOL)_shouldBatchFetch
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- (ASScrollDirection)_scrollDirectionForVelocity:(CGPoint)scrollVelocity
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{
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ASScrollDirection direction = ASScrollDirectionNone;
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ASScrollDirection scrollableDirections = [self scrollableDirections];
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if (ASScrollDirectionContainsHorizontalDirection(scrollableDirections)) { // Can scroll horizontally.
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if (scrollVelocity.x < 0.0) {
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direction |= ASScrollDirectionRight;
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} else if (scrollVelocity.x > 0.0) {
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direction |= ASScrollDirectionLeft;
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}
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}
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if (ASScrollDirectionContainsVerticalDirection(scrollableDirections)) { // Can scroll vertically.
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if (scrollVelocity.y < 0.0) {
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direction |= ASScrollDirectionDown;
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} else if (scrollVelocity.y > 0.0) {
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direction |= ASScrollDirectionUp;
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}
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}
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return direction;
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}
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- (ASScrollDirection)scrollableDirections
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{
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ASScrollDirection scrollableDirection = ASScrollDirectionNone;
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CGFloat totalContentWidth = self.contentSize.width + self.contentInset.left + self.contentInset.right;
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CGFloat totalContentHeight = self.contentSize.height + self.contentInset.top + self.contentInset.bottom;
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if (self.alwaysBounceHorizontal || totalContentWidth > self.bounds.size.width) { // Can scroll horizontally.
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scrollableDirection |= ASScrollDirectionHorizontalDirections;
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}
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if (self.alwaysBounceVertical || totalContentHeight > self.bounds.size.height) { // Can scroll vertically.
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scrollableDirection |= ASScrollDirectionVerticalDirections;
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}
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return scrollableDirection;
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}
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#pragma mark - Batch Fetching
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- (ASBatchContext *)batchContext
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{
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return _batchContext;
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}
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- (BOOL)canBatchFetch
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{
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// if the delegate does not respond to this method, there is no point in starting to fetch
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BOOL canFetch = [_asyncDelegate respondsToSelector:@selector(tableView:willBeginBatchFetchWithContext:)];
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@@ -752,12 +737,39 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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}
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}
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- (void)_scheduleCheckForBatchFetching
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{
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// Push this to the next runloop to be sure the UITableView has the right content size
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dispatch_async(dispatch_get_main_queue(), ^{
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[self _checkForBatchFetching];
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});
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}
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- (void)_checkForBatchFetching
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{
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// Dragging will be handled in scrollViewWillEndDragging:withVelocity:targetContentOffset:
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if (self.isDragging || self.isTracking) {
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return;
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}
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[self _beginBatchFetchingIfNeededWithScrollView:self forScrollDirection:[self scrollableDirections] contentOffset:self.contentOffset];
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}
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- (void)_beginBatchFetchingIfNeededWithScrollView:(UIScrollView<ASBatchFetchingScrollView> *)scrollView forScrollDirection:(ASScrollDirection)scrollDirection contentOffset:(CGPoint)contentOffset
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{
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if (ASDisplayShouldFetchBatchForScrollView(self, scrollDirection, contentOffset)) {
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[self _beginBatchFetching];
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}
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}
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- (void)_beginBatchFetching
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{
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[_batchContext beginBatchFetching];
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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[_asyncDelegate tableView:self willBeginBatchFetchWithContext:_batchContext];
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});
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if ([_asyncDelegate respondsToSelector:@selector(tableView:willBeginBatchFetchWithContext:)]) {
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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[_asyncDelegate tableView:self willBeginBatchFetchWithContext:_batchContext];
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});
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}
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}
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#pragma mark - ASRangeControllerDataSource
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@@ -897,13 +909,9 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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}
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BOOL preventAnimation = animationOptions == UITableViewRowAnimationNone;
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ASPerformBlockWithoutAnimation(preventAnimation, ^{
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[super insertRowsAtIndexPaths:indexPaths withRowAnimation:(UITableViewRowAnimation)animationOptions];
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// Push this to the next runloop to be sure the UITableView has the right content size
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dispatch_async(dispatch_get_main_queue(), ^{
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[self _checkForBatchFetching];
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});
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[self _scheduleCheckForBatchFetching];
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});
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if (_automaticallyAdjustsContentOffset) {
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@@ -923,10 +931,7 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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BOOL preventAnimation = animationOptions == UITableViewRowAnimationNone;
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ASPerformBlockWithoutAnimation(preventAnimation, ^{
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[super deleteRowsAtIndexPaths:indexPaths withRowAnimation:(UITableViewRowAnimation)animationOptions];
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// Push this to the next runloop to be sure the UITableView has the right content size
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dispatch_async(dispatch_get_main_queue(), ^{
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[self _checkForBatchFetching];
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});
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[self _scheduleCheckForBatchFetching];
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});
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if (_automaticallyAdjustsContentOffset) {
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@@ -947,10 +952,7 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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BOOL preventAnimation = animationOptions == UITableViewRowAnimationNone;
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ASPerformBlockWithoutAnimation(preventAnimation, ^{
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[super insertSections:indexSet withRowAnimation:(UITableViewRowAnimation)animationOptions];
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// Push this to the next runloop to be sure the UITableView has the right content size
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dispatch_async(dispatch_get_main_queue(), ^{
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[self _checkForBatchFetching];
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});
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[self _scheduleCheckForBatchFetching];
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});
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}
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@@ -966,10 +968,7 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
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BOOL preventAnimation = animationOptions == UITableViewRowAnimationNone;
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ASPerformBlockWithoutAnimation(preventAnimation, ^{
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[super deleteSections:indexSet withRowAnimation:(UITableViewRowAnimation)animationOptions];
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// Push this to the next runloop to be sure the UITableView has the right content size
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dispatch_async(dispatch_get_main_queue(), ^{
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[self _checkForBatchFetching];
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});
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[self _scheduleCheckForBatchFetching];
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});
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}
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