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https://github.com/Swiftgram/Telegram-iOS.git
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60cf43766b
There is an unsolved issue with this optimization that may cause crashes in certain cases. Reverting until it's properly resolved. It doesn't appear to be possible to cause the issue in the test apps used to develop it. This reverts commit 3f982b5c9a7e4a557c102268f11f71b58085ffef.
58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
/* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "ASRangeHandlerRender.h"
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#import "ASDisplayNode.h"
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#import "ASDisplayNode+Subclasses.h"
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#import "ASDisplayNodeInternal.h"
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@implementation ASRangeHandlerRender
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+ (UIWindow *)workingWindow
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{
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ASDisplayNodeAssertMainThread();
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// we add nodes' views to this invisible window to start async rendering
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// TODO: Replace this with directly triggering display https://github.com/facebook/AsyncDisplayKit/issues/315
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static UIWindow *workingWindow = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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workingWindow = [[UIWindow alloc] initWithFrame:CGRectZero];
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workingWindow.windowLevel = UIWindowLevelNormal - 1000;
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workingWindow.userInteractionEnabled = NO;
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workingWindow.hidden = YES;
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workingWindow.alpha = 0.0;
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});
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return workingWindow;
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}
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- (void)node:(ASDisplayNode *)node enteredRangeOfType:(ASLayoutRangeType)rangeType
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{
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ASDisplayNodeAssertMainThread();
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ASDisplayNodeAssert(rangeType == ASLayoutRangeTypeRender, @"Render delegate should not handle other ranges");
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[node recursivelySetDisplaySuspended:NO];
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// add the node to an off-screen window to force display and preserve its contents
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[[self.class workingWindow] addSubnode:node];
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}
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- (void)node:(ASDisplayNode *)node exitedRangeOfType:(ASLayoutRangeType)rangeType
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{
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ASDisplayNodeAssertMainThread();
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ASDisplayNodeAssert(rangeType == ASLayoutRangeTypeRender, @"Render delegate should not handle other ranges");
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[node recursivelySetDisplaySuspended:YES];
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[node.view removeFromSuperview];
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[node recursivelyClearContents];
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}
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@end
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