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https://github.com/Swiftgram/Telegram-iOS.git
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Initial commit to cleanup modifying subnode hierarchy (#2535)
This commit is contained in:
Michael Schneider
Adlai Holler
parent
076d22e9f1
commit
dae374d482
@ -1641,8 +1641,7 @@ static inline CATransform3D _calculateTransformFromReferenceToTarget(ASDisplayNo
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#pragma mark - Managing the Node Hierarchy
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static bool disableNotificationsForMovingBetweenParents(ASDisplayNode *from, ASDisplayNode *to)
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{
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ASDISPLAYNODE_INLINE bool shouldDisableNotificationsForMovingBetweenParents(ASDisplayNode *from, ASDisplayNode *to) {
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if (!from || !to) return NO;
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if (from->_flags.synchronous) return NO;
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if (to->_flags.synchronous) return NO;
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@ -1650,6 +1649,114 @@ static bool disableNotificationsForMovingBetweenParents(ASDisplayNode *from, ASD
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return YES;
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}
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/// Returns incremented value of i if i is not NSNotFound
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ASDISPLAYNODE_INLINE NSInteger incrementIfFound(NSInteger i) {
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return i == NSNotFound ? NSNotFound : i + 1;
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}
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/// Returns if a node is a member of a rasterized tree
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ASDISPLAYNODE_INLINE BOOL canUseViewAPI(ASDisplayNode *node, ASDisplayNode *subnode) {
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return (subnode.isLayerBacked == NO && node.isLayerBacked == NO);
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}
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/// Returns if node is a member of a rasterized tree
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ASDISPLAYNODE_INLINE BOOL nodeIsInRasterizedTree(ASDisplayNode *node) {
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return (node->_flags.shouldRasterizeDescendants || (node->_hierarchyState & ASHierarchyStateRasterized));
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}
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/*
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* Central private helper method that should eventually be called if submethods add, insert or replace subnodes
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* You must hold __instanceLock__ to call this.
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*
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* @param subnode The subnode to insert
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* @param subnodeIndex The index in _subnodes to insert it
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* @param viewSublayerIndex The index in layer.sublayers (not view.subviews) at which to insert the view (use if we can use the view API) otherwise pass NSNotFound
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* @param sublayerIndex The index in layer.sublayers at which to insert the layer (use if either parent or subnode is layer-backed) otherwise pass NSNotFound
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* @param oldSubnode Remove this subnode before inserting; ok to be nil if no removal is desired
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*/
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- (void)_insertSubnode:(ASDisplayNode *)subnode atSubnodeIndex:(NSInteger)subnodeIndex sublayerIndex:(NSInteger)sublayerIndex andRemoveSubnode:(ASDisplayNode *)oldSubnode
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{
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if (subnode == nil || subnode == self) {
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ASDisplayNodeFailAssert(@"Cannot insert a nil subnode or self as subnode");
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return;
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}
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if (subnodeIndex == NSNotFound) {
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ASDisplayNodeFailAssert(@"Try to insert node on an index that was not found");
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return;
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}
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if (subnodeIndex > _subnodes.count || subnodeIndex < 0) {
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ASDisplayNodeFailAssert(@"Cannot insert a subnode at index %zd. Count is %zd", subnodeIndex, _subnodes.count);
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return;
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}
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// Disable appearance methods during move between supernodes, but make sure we restore their state after we do our thing
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ASDisplayNode *oldParent = subnode.supernode;
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BOOL disableNotifications = shouldDisableNotificationsForMovingBetweenParents(oldParent, self);
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if (disableNotifications) {
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[subnode __incrementVisibilityNotificationsDisabled];
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}
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[subnode _removeFromSupernode];
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[oldSubnode _removeFromSupernode];
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if (_subnodes == nil) {
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_subnodes = [[NSMutableArray alloc] init];
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}
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ASDisplayNodeLogEvent(self, @"%@: %@", NSStringFromSelector(_cmd), subnode);
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[_subnodes insertObject:subnode atIndex:subnodeIndex];
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// This call will apply our .hierarchyState to the new subnode.
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// If we are a managed hierarchy, as in ASCellNode trees, it will also apply our .interfaceState.
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[subnode __setSupernode:self];
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// Don't bother inserting the view/layer if in a rasterized subtree, because there are no layers in the hierarchy and
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// none of this could possibly work.
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if (nodeIsInRasterizedTree(self) == NO && self.nodeLoaded) {
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// If node is loaded insert the subnode otherwise wait until the node get's loaded
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ASPerformBlockOnMainThread(^{
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[self _insertSubnodeSubviewOrSublayer:subnode atIndex:sublayerIndex];
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});
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}
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ASDisplayNodeAssert(disableNotifications == shouldDisableNotificationsForMovingBetweenParents(oldParent, self), @"Invariant violated");
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if (disableNotifications) {
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[subnode __decrementVisibilityNotificationsDisabled];
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}
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}
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/*
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* Inserts the view or layer of the given node at the given index
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* You must hold __instanceLock__ to call this.
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*
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* @param subnode The subnode to insert
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* @param idx The index in _view.subviews or _layer.sublayers at which to insert the subnode.view or
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* subnode.layer of the subnode
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*/
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- (void)_insertSubnodeSubviewOrSublayer:(ASDisplayNode *)subnode atIndex:(NSInteger)idx
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{
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ASDisplayNodeAssertMainThread();
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ASDisplayNodeAssert(self.nodeLoaded, @"_insertSubnodeSubviewOrSublayer:atIndex: should never be called before our own view is created");
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ASDisplayNodeAssert(idx != NSNotFound, @"Try to insert node on an index that was not found");
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if (idx == NSNotFound) {
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return;
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}
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// If we can use view API, do. Due to an apple bug, -insertSubview:atIndex: actually wants a LAYER index, which we pass in
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if (canUseViewAPI(self, subnode)) {
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[_view insertSubview:subnode.view atIndex:idx];
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} else {
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wconversion"
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[_layer insertSublayer:subnode.layer atIndex:idx];
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#pragma clang diagnostic pop
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}
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}
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- (void)addSubnode:(ASDisplayNode *)subnode
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{
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// TODO: 2.0 Conversion: Reenable and fix within product code
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@ -1663,108 +1770,29 @@ static bool disableNotificationsForMovingBetweenParents(ASDisplayNode *from, ASD
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ASDN::MutexLocker l(__instanceLock__);
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ASDisplayNodeAssert(subnode, @"Cannot insert a nil subnode");
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// Don't add subnode if it's already if it's already a subnodes
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ASDisplayNode *oldParent = subnode.supernode;
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if (!subnode || subnode == self || oldParent == self) {
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return;
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}
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// Disable appearance methods during move between supernodes, but make sure we restore their state after we do our thing
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BOOL isMovingEquivalentParents = disableNotificationsForMovingBetweenParents(oldParent, self);
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if (isMovingEquivalentParents) {
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[subnode __incrementVisibilityNotificationsDisabled];
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}
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[subnode _removeFromSupernode];
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if (!_subnodes) {
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_subnodes = [[NSMutableArray alloc] init];
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[self _insertSubnode:subnode atSubnodeIndex:_subnodes.count sublayerIndex:_layer.sublayers.count andRemoveSubnode:nil];
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}
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ASDisplayNodeLogEvent(self, @"%@ %@", NSStringFromSelector(_cmd), subnode);
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[_subnodes addObject:subnode];
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// This call will apply our .hierarchyState to the new subnode.
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// If we are a managed hierarchy, as in ASCellNode trees, it will also apply our .interfaceState.
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[subnode __setSupernode:self];
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if (self.nodeLoaded) {
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// If this node has a view or layer, force the subnode to also create its view or layer and add it to the hierarchy here.
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// Otherwise there is no way for the subnode's view or layer to enter the hierarchy, except recursing down all
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// subnodes on the main thread after the node tree has been created but before the first display (which
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// could introduce performance problems).
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ASPerformBlockOnMainThread(^{
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[self _addSubnodeSubviewOrSublayer:subnode];
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});
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}
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ASDisplayNodeAssert(isMovingEquivalentParents == disableNotificationsForMovingBetweenParents(oldParent, self), @"Invariant violated");
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if (isMovingEquivalentParents) {
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[subnode __decrementVisibilityNotificationsDisabled];
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}
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}
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/*
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Private helper function.
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You must hold __instanceLock__ to call this.
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@param subnode The subnode to insert
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@param subnodeIndex The index in _subnodes to insert it
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@param viewSublayerIndex The index in layer.sublayers (not view.subviews) at which to insert the view (use if we can use the view API) otherwise pass NSNotFound
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@param sublayerIndex The index in layer.sublayers at which to insert the layer (use if either parent or subnode is layer-backed) otherwise pass NSNotFound
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@param oldSubnode Remove this subnode before inserting; ok to be nil if no removal is desired
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*/
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- (void)_insertSubnode:(ASDisplayNode *)subnode atSubnodeIndex:(NSInteger)subnodeIndex sublayerIndex:(NSInteger)sublayerIndex andRemoveSubnode:(ASDisplayNode *)oldSubnode
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- (void)_addSubnodeViewsAndLayers
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{
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if (subnodeIndex == NSNotFound) {
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return;
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}
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ASDisplayNodeAssert(subnode, @"Cannot insert a nil subnode");
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if (!subnode) {
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return;
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}
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ASDisplayNode *oldParent = [subnode _deallocSafeSupernode];
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// Disable appearance methods during move between supernodes, but make sure we restore their state after we do our thing
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BOOL isMovingEquivalentParents = disableNotificationsForMovingBetweenParents(oldParent, self);
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if (isMovingEquivalentParents) {
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[subnode __incrementVisibilityNotificationsDisabled];
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}
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[subnode _removeFromSupernode];
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[oldSubnode _removeFromSupernode];
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if (!_subnodes)
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_subnodes = [[NSMutableArray alloc] init];
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ASDisplayNodeLogEvent(self, @"%@: %@", NSStringFromSelector(_cmd), subnode);
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[_subnodes insertObject:subnode atIndex:subnodeIndex];
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[subnode __setSupernode:self];
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// Don't bother inserting the view/layer if in a rasterized subtree, because there are no layers in the hierarchy and none of this could possibly work.
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if (!_flags.shouldRasterizeDescendants && [self __shouldLoadViewOrLayer]) {
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if (_layer) {
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ASDisplayNodeCAssertMainThread();
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ASDisplayNodeAssert(sublayerIndex != NSNotFound, @"Should pass either a valid sublayerIndex");
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if (sublayerIndex != NSNotFound) {
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BOOL canUseViewAPI = !subnode.isLayerBacked && !self.isLayerBacked;
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// If we can use view API, do. Due to an apple bug, -insertSubview:atIndex: actually wants a LAYER index, which we pass in
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if (canUseViewAPI && sublayerIndex != NSNotFound) {
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[_view insertSubview:subnode.view atIndex:sublayerIndex];
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} else if (sublayerIndex != NSNotFound) {
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wconversion"
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[_layer insertSublayer:subnode.layer atIndex:sublayerIndex];
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#pragma clang diagnostic pop
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}
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}
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for (ASDisplayNode *node in [_subnodes copy]) {
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[self _addSubnodeSubviewOrSublayer:node];
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}
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}
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ASDisplayNodeAssert(isMovingEquivalentParents == disableNotificationsForMovingBetweenParents(oldParent, self), @"Invariant violated");
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if (isMovingEquivalentParents) {
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[subnode __decrementVisibilityNotificationsDisabled];
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}
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- (void)_addSubnodeSubviewOrSublayer:(ASDisplayNode *)subnode
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{
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// Due to a bug in Apple's framework we have to use the layer index to insert a subview
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// so just use th ecount of the sublayers to add the subnode
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NSInteger idx = _layer.sublayers.count;
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[self _insertSubnodeSubviewOrSublayer:subnode atIndex:idx];
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}
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- (void)replaceSubnode:(ASDisplayNode *)oldSubnode withSubnode:(ASDisplayNode *)replacementSubnode
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@ -1779,31 +1807,37 @@ static bool disableNotificationsForMovingBetweenParents(ASDisplayNode *from, ASD
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ASDisplayNodeAssertThreadAffinity(self);
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ASDN::MutexLocker l(__instanceLock__);
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if (!replacementSubnode || [oldSubnode _deallocSafeSupernode] != self) {
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ASDisplayNodeAssert(0, @"Bad use of api. Invalid subnode to replace async.");
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if (replacementSubnode == nil) {
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ASDisplayNodeFailAssert(@"Invalid subnode to replace");
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return;
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}
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ASDisplayNodeAssert(!(self.nodeLoaded && !oldSubnode.nodeLoaded), @"ASDisplayNode corruption bug. We have view loaded, but child node does not.");
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if ([oldSubnode _deallocSafeSupernode] != self) {
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ASDisplayNodeFailAssert(@"Old Subnode to replace must be a subnode");
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return;
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}
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ASDisplayNodeAssert(!(self.nodeLoaded && !oldSubnode.nodeLoaded), @"We have view loaded, but child node does not.");
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ASDisplayNodeAssert(_subnodes, @"You should have subnodes if you have a subnode");
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NSInteger subnodeIndex = [_subnodes indexOfObjectIdenticalTo:oldSubnode];
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NSInteger sublayerIndex = NSNotFound;
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// Don't bother figuring out the sublayerIndex if in a rasterized subtree, because there are no layers in the
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// hierarchy and none of this could possibly work.
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if (nodeIsInRasterizedTree(self) == NO) {
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if (_layer) {
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sublayerIndex = [_layer.sublayers indexOfObjectIdenticalTo:oldSubnode.layer];
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ASDisplayNodeAssert(sublayerIndex != NSNotFound, @"Somehow oldSubnode's supernode is self, yet we could not find it in our layers to replace");
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if (sublayerIndex == NSNotFound) return;
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if (sublayerIndex == NSNotFound) {
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return;
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}
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}
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}
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[self _insertSubnode:replacementSubnode atSubnodeIndex:subnodeIndex sublayerIndex:sublayerIndex andRemoveSubnode:oldSubnode];
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}
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// This is just a convenience to avoid a bunch of conditionals
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static NSInteger incrementIfFound(NSInteger i) {
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return i == NSNotFound ? NSNotFound : i + 1;
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}
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- (void)insertSubnode:(ASDisplayNode *)subnode belowSubnode:(ASDisplayNode *)below
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{
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// TODO: 2.0 Conversion: Reenable and fix within product code
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@ -1816,13 +1850,13 @@ static NSInteger incrementIfFound(NSInteger i) {
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ASDisplayNodeAssertThreadAffinity(self);
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ASDN::MutexLocker l(__instanceLock__);
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ASDisplayNodeAssert(subnode, @"Cannot insert a nil subnode");
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if (!subnode) {
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if (subnode == nil) {
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ASDisplayNodeFailAssert(@"Cannot insert a nil subnode");
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return;
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}
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ASDisplayNodeAssert([below _deallocSafeSupernode] == self, @"Node to insert below must be a subnode");
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if ([below _deallocSafeSupernode] != self) {
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ASDisplayNodeFailAssert(@"Node to insert below must be a subnode");
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return;
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}
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@ -1831,13 +1865,21 @@ static NSInteger incrementIfFound(NSInteger i) {
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NSInteger belowSubnodeIndex = [_subnodes indexOfObjectIdenticalTo:below];
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NSInteger belowSublayerIndex = NSNotFound;
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// Don't bother figuring out the sublayerIndex if in a rasterized subtree, because there are no layers in the
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// hierarchy and none of this could possibly work.
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if (nodeIsInRasterizedTree(self) == NO) {
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if (_layer) {
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belowSublayerIndex = [_layer.sublayers indexOfObjectIdenticalTo:below.layer];
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ASDisplayNodeAssert(belowSublayerIndex != NSNotFound, @"Somehow below's supernode is self, yet we could not find it in our layers to reference");
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if (belowSublayerIndex == NSNotFound)
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return;
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}
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// If the subnode is already in the subnodes array / sublayers and it's before the below node, removing it to insert it will mess up our calculation
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ASDisplayNodeAssert(belowSubnodeIndex != NSNotFound, @"Couldn't find above in subnodes");
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// If the subnode is already in the subnodes array / sublayers and it's before the below node, removing it to
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// insert it will mess up our calculation
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if ([subnode _deallocSafeSupernode] == self) {
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NSInteger currentIndexInSubnodes = [_subnodes indexOfObjectIdenticalTo:subnode];
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if (currentIndexInSubnodes < belowSubnodeIndex) {
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@ -1850,6 +1892,7 @@ static NSInteger incrementIfFound(NSInteger i) {
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}
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}
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}
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}
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ASDisplayNodeAssert(belowSubnodeIndex != NSNotFound, @"Couldn't find below in subnodes");
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@ -1868,13 +1911,13 @@ static NSInteger incrementIfFound(NSInteger i) {
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ASDisplayNodeAssertThreadAffinity(self);
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ASDN::MutexLocker l(__instanceLock__);
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ASDisplayNodeAssert(subnode, @"Cannot insert a nil subnode");
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if (!subnode) {
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if (subnode == nil) {
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ASDisplayNodeFailAssert(@"Cannot insert a nil subnode");
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return;
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}
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ASDisplayNodeAssert([above _deallocSafeSupernode] == self, @"Node to insert above must be a subnode");
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if ([above _deallocSafeSupernode] != self) {
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ASDisplayNodeFailAssert(@"Node to insert above must be a subnode");
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return;
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}
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@ -1883,17 +1926,20 @@ static NSInteger incrementIfFound(NSInteger i) {
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NSInteger aboveSubnodeIndex = [_subnodes indexOfObjectIdenticalTo:above];
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NSInteger aboveSublayerIndex = NSNotFound;
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// Don't bother figuring out the sublayerIndex if in a rasterized subtree, because there are no layers in the hierarchy and none of this could possibly work.
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if (!_flags.shouldRasterizeDescendants && [self __shouldLoadViewOrLayer]) {
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// Don't bother figuring out the sublayerIndex if in a rasterized subtree, because there are no layers in the
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// hierarchy and none of this could possibly work.
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if (nodeIsInRasterizedTree(self) == NO) {
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if (_layer) {
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aboveSublayerIndex = [_layer.sublayers indexOfObjectIdenticalTo:above.layer];
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ASDisplayNodeAssert(aboveSublayerIndex != NSNotFound, @"Somehow above's supernode is self, yet we could not find it in our layers to replace");
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if (aboveSublayerIndex == NSNotFound)
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return;
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}
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ASDisplayNodeAssert(aboveSubnodeIndex != NSNotFound, @"Couldn't find above in subnodes");
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// If the subnode is already in the subnodes array / sublayers and it's before the below node, removing it to insert it will mess up our calculation
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// If the subnode is already in the subnodes array / sublayers and it's before the below node, removing it to
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// insert it will mess up our calculation
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if ([subnode _deallocSafeSupernode] == self) {
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NSInteger currentIndexInSubnodes = [_subnodes indexOfObjectIdenticalTo:subnode];
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if (currentIndexInSubnodes <= aboveSubnodeIndex) {
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@ -1923,18 +1969,21 @@ static NSInteger incrementIfFound(NSInteger i) {
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ASDisplayNodeAssertThreadAffinity(self);
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ASDN::MutexLocker l(__instanceLock__);
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if (subnode == nil) {
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ASDisplayNodeFailAssert(@"Cannot insert a nil subnode");
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return;
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}
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if (idx > _subnodes.count || idx < 0) {
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ASDisplayNodeFailAssert(@"Cannot insert a subnode at index %zd. Count is %zd", idx, _subnodes.count);
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return;
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}
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if (subnode == nil) {
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ASDisplayNodeFailAssert(@"Attempt to insert a nil subnode into node %@", self);
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return;
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}
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NSInteger sublayerIndex = NSNotFound;
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// Don't bother figuring out the sublayerIndex if in a rasterized subtree, because there are no layers in the
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// hierarchy and none of this could possibly work.
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if (nodeIsInRasterizedTree(self) == NO) {
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// Account for potentially having other subviews
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if (_layer && idx == 0) {
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sublayerIndex = 0;
|
||||
@ -1944,35 +1993,11 @@ static NSInteger incrementIfFound(NSInteger i) {
|
||||
sublayerIndex = incrementIfFound([_layer.sublayers indexOfObjectIdenticalTo:positionInRelationTo.layer]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
[self _insertSubnode:subnode atSubnodeIndex:idx sublayerIndex:sublayerIndex andRemoveSubnode:nil];
|
||||
}
|
||||
|
||||
|
||||
- (void)_addSubnodeSubviewOrSublayer:(ASDisplayNode *)subnode
|
||||
{
|
||||
ASDisplayNodeAssertMainThread();
|
||||
ASDisplayNodeAssert(self.nodeLoaded, @"_addSubnodeSubview: should never be called before our own view is created");
|
||||
|
||||
BOOL canUseViewAPI = !self.isLayerBacked && !subnode.isLayerBacked;
|
||||
if (canUseViewAPI) {
|
||||
[_view addSubview:subnode.view];
|
||||
} else {
|
||||
// Disallow subviews in a layer-backed node
|
||||
ASDisplayNodeAssert(subnode.isLayerBacked, @"Cannot add a subview to a layer-backed node; only sublayers permitted.");
|
||||
[_layer addSublayer:subnode.layer];
|
||||
}
|
||||
}
|
||||
|
||||
- (void)_addSubnodeViewsAndLayers
|
||||
{
|
||||
ASDisplayNodeAssertMainThread();
|
||||
|
||||
for (ASDisplayNode *node in [_subnodes copy]) {
|
||||
[self _addSubnodeSubviewOrSublayer:node];
|
||||
}
|
||||
}
|
||||
|
||||
- (void)_removeSubnode:(ASDisplayNode *)subnode
|
||||
{
|
||||
ASDisplayNodeAssertThreadAffinity(self);
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user