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Code Issues Projects Releases Wiki Activity

Refine invalidation of conversation view layout.

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This commit is contained in:
Matthew Chen 2019-01-24 10:38:30 -05:00
parent 096e54da67
commit 9efe1377a2
1 changed files with 5 additions and 2 deletions
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7
Signal/src/ViewControllers/ConversationView/ConversationViewLayout.m
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@ -1,5 +1,5 @@
//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
//
#import "ConversationViewLayout.h"
@ -10,6 +10,7 @@ NS_ASSUME_NONNULL_BEGIN
@interface ConversationViewLayout ()
@property (nonatomic) CGFloat lastViewWidth;
@property (nonatomic) CGSize contentSize;
@property (nonatomic, readonly) NSMutableDictionary<NSNumber *, UICollectionViewLayoutAttributes *> *itemAttributesMap;
@ -66,6 +67,7 @@ NS_ASSUME_NONNULL_BEGIN
self.contentSize = CGSizeZero;
[self.itemAttributesMap removeAllObjects];
self.hasLayout = NO;
self.lastViewWidth = 0.f;
}
- (void)prepareLayout
@ -135,6 +137,7 @@ NS_ASSUME_NONNULL_BEGIN
contentBottom += self.conversationStyle.contentMarginBottom;
self.contentSize = CGSizeMake(viewWidth, contentBottom);
self.lastViewWidth = viewWidth;
}
- (nullable NSArray<__kindof UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect
@ -160,7 +163,7 @@ NS_ASSUME_NONNULL_BEGIN
- (BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds
{
return self.collectionView.bounds.size.width != newBounds.size.width;
return self.lastViewWidth != newBounds.size.width;
}
@end