Build ChatListUI

submodules/LegacyComponents/Sources/TGItemPreviewView.m

@@ -0,0 +1,147 @@
+#import "TGItemPreviewView.h"
+
+#import "LegacyComponentsInternal.h"
+
+@interface TGItemPreviewView ()
+{
+    bool _disappearing;
+}
+@end
+
+@implementation TGItemPreviewView
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self != nil)
+    {
+        _dimView = [[UIView alloc] init];
+        _dimView.backgroundColor = [UIColor colorWithWhite:1.0f alpha:0.7f];
+        _dimView.alpha = 0.0f;
+        [self addSubview:_dimView];
+        
+        _wrapperView = [[UIView alloc] init];
+        _wrapperView.alpha = 0.0f;
+        [self addSubview:_wrapperView];
+    }
+    return self;
+}
+
+- (void)animateAppear
+{
+    _wrapperView.frame = self.bounds;
+    
+    CGPoint transitionInPoint = CGPointZero;
+    if (self.sourcePointForItem != nil)
+        transitionInPoint = self.sourcePointForItem(self.item);
+    
+    bool animatedCenter = false;
+    if (!CGPointEqualToPoint(transitionInPoint, CGPointZero))
+    {
+        _wrapperView.center = transitionInPoint;
+        animatedCenter = true;
+    }
+    
+    _dimView.alpha = 0.0f;
+    _wrapperView.transform = CGAffineTransformMakeScale(0.1f, 0.1f);
+    
+    void (^changeBlock)(void) = ^
+    {
+        _dimView.alpha = 1.0f;
+        _wrapperView.alpha = 1.0f;
+        _wrapperView.transform = CGAffineTransformIdentity;
+        
+        if (animatedCenter)
+            _wrapperView.center = [self _wrapperViewContainerCenter];
+    };
+    
+    void (^completionBlock)(BOOL) = ^(__unused BOOL finished)
+    {
+        if (finished && !_disappearing)
+            [self _didAppear];
+    };
+    
+    if (iosMajorVersion() < 8)
+    {
+        [UIView animateWithDuration:0.2 delay:0.0 options:UIViewAnimationOptionCurveEaseOut animations:changeBlock completion:completionBlock];
+    }
+    else
+    {
+        [UIView animateWithDuration:0.5 delay:0.0 usingSpringWithDamping:0.72f initialSpringVelocity:0.0f options:0 animations:changeBlock completion:completionBlock];
+    }
+}
+
+- (void)animateDismiss:(void (^)())completion
+{
+    CGPoint transitionOutPoint = CGPointZero;
+    if (self.sourcePointForItem != nil)
+        transitionOutPoint = self.sourcePointForItem(self.item);
+    
+    [self _willDisappear];
+    
+    _disappearing = true;
+    
+    [UIView animateWithDuration:0.2 animations:^
+    {
+        _dimView.alpha = 0.0f;
+        _wrapperView.transform = CGAffineTransformMakeScale(0.3f, 0.3f);
+        _wrapperView.alpha = 0.0f;
+        
+        if (!CGPointEqualToPoint(transitionOutPoint, CGPointZero))
+            _wrapperView.center = transitionOutPoint;
+     } completion:^(__unused BOOL finished)
+     {
+         if (completion)
+             completion();
+     }];
+}
+
+- (void)_didAppear
+{
+    
+}
+
+- (void)_willDisappear
+{
+    
+}
+
+- (CGPoint)_wrapperViewContainerCenter
+{
+    CGRect bounds = self.bounds;
+    
+    CGFloat y = bounds.size.height / 2.0f;
+    if (bounds.size.height > bounds.size.width && self.eccentric)
+        y = bounds.size.height / 3.0f;
+    
+    return CGPointMake(bounds.size.width / 2.0f, y);
+}
+
+- (void)_handlePanOffset:(CGFloat)__unused offset
+{
+    
+}
+
+- (void)_handlePressEnded
+{
+    
+}
+
+- (bool)_maybeLockWithVelocity:(CGFloat)__unused velocity
+{
+    return false;
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    CGRect previousBounds = _dimView.bounds;
+    if (!CGRectEqualToRect(self.bounds, previousBounds))
+    {
+        _dimView.frame = self.bounds;
+        _wrapperView.center = [self _wrapperViewContainerCenter];
+    }
+}
+
+@end