Build ChatListUI

2025-12-22 14:20:20 +00:00 · 2020-02-22 15:38:54 +04:00
parent f57d6b6168
commit 5380b12805
1510 changed files with 643 additions and 309 deletions
--- a/submodules/LegacyComponents/Sources/TGPhotoStickersCollectionView.m
+++ b/submodules/LegacyComponents/Sources/TGPhotoStickersCollectionView.m
@@ -0,0 +1,121 @@
+#import "TGPhotoStickersCollectionView.h"
+
+#import "TGPhotoStickersCollectionLayout.h"
+#import "TGPhotoStickersSectionHeader.h"
+#import "TGPhotoStickersSectionHeaderView.h"
+
+@interface TGPhotoStickersCollectionView ()
+{
+    NSMutableArray *_sectionHeaderViewQueue;
+    NSMutableArray *_visibleSectionHeaderViews;
+}
+
+@end
+
+@implementation TGPhotoStickersCollectionView
+
+- (instancetype)initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout
+{
+    self = [super initWithFrame:frame collectionViewLayout:layout];
+    if (self != nil)
+    {
+        _sectionHeaderViewQueue = [[NSMutableArray alloc] init];
+        _visibleSectionHeaderViews = [[NSMutableArray alloc] init];
+    }
+    return self;
+}
+
+- (void)reloadData
+{
+    for (TGPhotoStickersSectionHeaderView *headerView in _visibleSectionHeaderViews)
+    {
+        [self enqueueSectionHeaderView:headerView];
+    }
+    [_visibleSectionHeaderViews removeAllObjects];
+    
+    [super reloadData];
+}
+
+- (TGPhotoStickersSectionHeaderView *)dequeueSectionHeaderView
+{
+    TGPhotoStickersSectionHeaderView *headerView = [_sectionHeaderViewQueue lastObject];
+    if (headerView != nil)
+    {
+        [_sectionHeaderViewQueue removeLastObject];
+        return headerView;
+    }
+    else
+    {
+        headerView = [[TGPhotoStickersSectionHeaderView alloc] init];
+        if (self.headerTextColor != nil)
+            [headerView setTextColor:self.headerTextColor];
+        return headerView;
+    }
+}
+
+- (void)enqueueSectionHeaderView:(TGPhotoStickersSectionHeaderView *)headerView
+{
+    [headerView removeFromSuperview];
+    [_sectionHeaderViewQueue addObject:headerView];
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    CGRect bounds = self.bounds;
+    UIEdgeInsets insets = self.contentInset;
+    
+    for (TGPhotoStickersSectionHeader *sectionHeader in [(TGPhotoStickersCollectionLayout *)self.collectionViewLayout sectionHeaders])
+    {
+        CGRect headerFloatingBounds = sectionHeader.floatingFrame;
+        
+        if (CGRectIntersectsRect(bounds, headerFloatingBounds))
+        {
+            TGPhotoStickersSectionHeaderView *headerView = nil;
+            for (TGPhotoStickersSectionHeaderView *visibleHeaderView in _visibleSectionHeaderViews)
+            {
+                if (visibleHeaderView.index == sectionHeader.index)
+                {
+                    headerView = visibleHeaderView;
+                    break;
+                }
+            }
+            
+            if (headerView == nil)
+            {
+                headerView = [self dequeueSectionHeaderView];
+                headerView.index = sectionHeader.index;
+                id<TGPhotoStickersCollectionViewDelegate> delegate = (id<TGPhotoStickersCollectionViewDelegate>)self.delegate;
+                [delegate collectionView:self setupSectionHeaderView:headerView forSectionHeader:sectionHeader];
+                [_visibleSectionHeaderViews addObject:headerView];
+
+                [_headersParentView addSubview:headerView];
+            }
+            
+            CGRect headerFrame = sectionHeader.bounds;
+            headerFrame.origin.y = MIN(headerFloatingBounds.origin.y + 8.0f + headerFloatingBounds.size.height - headerFrame.size.height, MAX(headerFloatingBounds.origin.y, bounds.origin.y + insets.top));
+            headerView.frame = [self convertRect:headerFrame toView:_headersParentView];
+            [headerView.layer removeAllAnimations];
+            
+            CGFloat alpha = MAX(0.0f, MIN(1.0f, (headerView.frame.origin.y - 80.0f) / 24.0f));
+            headerView.alpha = alpha;
+        }
+        else
+        {
+            NSInteger index = -1;
+            for (TGPhotoStickersSectionHeaderView *headerView in _visibleSectionHeaderViews)
+            {
+                index++;
+                if (headerView.index == sectionHeader.index)
+                {
+                    [self enqueueSectionHeaderView:headerView];
+                    [_visibleSectionHeaderViews removeObjectAtIndex:index];
+                    break;
+                }
+            }
+        }
+    }
+}
+
+@end