Build ChatListUI

submodules/LegacyComponents/Sources/TGLetteredAvatarView.m

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+#import "TGLetteredAvatarView.h"
+
+#import "LegacyComponentsInternal.h"
+#import "TGFont.h"
+#import "TGImageUtils.h"
+
+#import <LegacyComponents/TGImageManager.h>
+#import "TGGradientLabel.h"
+
+@interface TGLetteredAvatarView ()
+{
+    TGGradientLabel *_label;
+    
+    UIFont *_singleFont;
+    UIFont *_doubleFont;
+    bool _usingSingleFont;
+    CGFloat _singleSize;
+    CGFloat _doubleSize;
+}
+
+@end
+
+@implementation TGLetteredAvatarView
+
+- (id)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self != nil)
+    {
+        if (iosMajorVersion() >= 11)
+            self.accessibilityIgnoresInvertColors = true;
+        
+        _label = [[TGGradientLabel alloc] init];
+        _label.backgroundColor = [UIColor clearColor];
+        [self addSubview:_label];
+    }
+    return self;
+}
+
+- (void)setSingleFontSize:(CGFloat)singleFontSize doubleFontSize:(CGFloat)doubleFontSize useBoldFont:(bool)__unused useBoldFont
+{
+    if (ABS(singleFontSize - _singleSize) < FLT_EPSILON && ABS(doubleFontSize - _doubleSize) < FLT_EPSILON)
+        return;
+    
+    _singleSize = singleFontSize;
+    _doubleSize = doubleFontSize;
+    
+    _singleFont = [TGFont roundedFontOfSize:singleFontSize];
+    _doubleFont = _singleFont;
+}
+
+- (void)loadImage:(UIImage *)image
+{
+    _label.hidden = true;
+    
+    [super loadImage:image];
+}
+
+- (void)loadImage:(NSString *)url filter:(NSString *)filter placeholder:(UIImage *)placeholder forceFade:(bool)forceFade
+{
+    _label.hidden = true;
+    
+    [super loadImage:url filter:filter placeholder:placeholder forceFade:forceFade];
+}
+
+static bool isEmojiCharacter(NSString *singleChar)
+{
+    const unichar high = [singleChar characterAtIndex:0];
+    
+    if (0xd800 <= high && high <= 0xdbff && singleChar.length >= 2)
+    {
+        const unichar low = [singleChar characterAtIndex:1];
+        const int codepoint = ((high - 0xd800) * 0x400) + (low - 0xdc00) + 0x10000;
+        
+        return (0x1d000 <= codepoint && codepoint <= 0x1f77f);
+    }
+    
+    return (0x2100 <= high && high <= 0x27bf);
+}
+
+- (NSString *)_cleanedUpString:(NSString *)string
+{
+    NSMutableString *__block buffer = [NSMutableString stringWithCapacity:string.length];
+    
+    [string enumerateSubstringsInRange:NSMakeRange(0, string.length)
+                               options:NSStringEnumerationByComposedCharacterSequences
+                            usingBlock: ^(NSString* substring, __unused NSRange substringRange, __unused NSRange enclosingRange, __unused BOOL* stop)
+     {
+         [buffer appendString:isEmojiCharacter(substring) ? @"" : substring];
+     }];
+    
+    return buffer;
+}
+
+- (void)setFirstName:(NSString *)firstName lastName:(NSString *)lastName
+{
+    if (!_label.hidden)
+    {
+        NSString *cleanFirstName = [self _cleanedUpString:firstName];
+        NSString *cleanLastName = [self _cleanedUpString:lastName];
+        
+        if (cleanFirstName.length != 0 && cleanLastName.length != 0)
+            _label.text = [[NSString alloc] initWithFormat:@"%@\u200B%@", [cleanFirstName substringToIndex:1], [cleanLastName substringToIndex:1]];
+        else if (cleanFirstName.length != 0)
+            _label.text = [cleanFirstName substringToIndex:1];
+        else if (cleanLastName.length != 0)
+            _label.text = [cleanLastName substringToIndex:1];
+        else
+            _label.text = @" ";
+        
+        if (cleanFirstName.length != 0 && cleanLastName.length != 0)
+        {
+            _label.text = [[NSString alloc] initWithFormat:@"%@\u200B%@", [cleanFirstName substringToIndex:1], [cleanLastName substringToIndex:1]];
+        }
+        else if (cleanFirstName.length != 0)
+        {
+            _label.text = [cleanFirstName substringToIndex:1];
+        }
+        else if (cleanLastName.length != 0)
+        {
+            _label.text = [cleanLastName substringToIndex:1];
+        }
+        else
+            _label.text = @" ";
+        
+        [_label sizeToFit];
+        CGSize labelSize = _label.frame.size;
+        CGSize boundsSize = self.bounds.size;
+        labelSize.height = boundsSize.height;
+        _label.frame = CGRectMake(TGRetinaFloor((boundsSize.width - labelSize.width) / 2.0f), CGFloor((boundsSize.height - labelSize.height) / 2.0f), labelSize.width, labelSize.height);
+    }
+}
+
+- (void)setTitle:(NSString *)title
+{
+    NSString *cleanTitle = [self _cleanedUpString:title];
+    _label.text = cleanTitle.length >= 1 ? [cleanTitle substringToIndex:1] : @" ";
+    
+    [_label sizeToFit];
+    [self setNeedsLayout];
+}
+
+- (void)setTitleNeedsDisplay
+{
+    if (!_label.hidden)
+        [_label setNeedsDisplay];
+}
+
+- (void)loadSavedMessagesWithSize:(CGSize)size placeholder:(UIImage *)placeholder
+{
+    _label.text = @"";
+    
+    NSString *placeholderUri = [[NSString alloc] initWithFormat:@"placeholder://?type=saved-messages&w=%d&h=%d" PRId32 "", (int)size.width, (int)size.height];
+    if (!TGStringCompare([self currentUrl], placeholderUri))
+        [super loadImage:placeholderUri filter:nil placeholder:placeholder];
+    
+    _label.hidden = true;
+}
+
+- (void)loadUserPlaceholderWithSize:(CGSize)size uid:(int)uid firstName:(NSString *)firstName lastName:(NSString *)lastName placeholder:(UIImage *)placeholder
+{
+    _label.font = _doubleFont;
+    _usingSingleFont = false;
+    
+    NSString *cleanFirstName = [self _cleanedUpString:firstName];
+    NSString *cleanLastName = [self _cleanedUpString:lastName];
+    
+    if (cleanFirstName.length != 0 && cleanLastName.length != 0)
+    {
+        _label.text = [[NSString alloc] initWithFormat:@"%@\u200B%@", [cleanFirstName substringToIndex:1], [cleanLastName substringToIndex:1]];
+    }
+    else if (cleanFirstName.length != 0)
+    {
+        _label.text = [cleanFirstName substringToIndex:1];
+    }
+    else if (cleanLastName.length != 0)
+    {
+        _label.text = [cleanLastName substringToIndex:1];
+    }
+    else
+        _label.text = @" ";
+    
+    _label.textColor = [UIColor whiteColor];
+    
+    [_label sizeToFit];
+    [self setNeedsLayout];
+    
+    NSString *placeholderUri = [[NSString alloc] initWithFormat:@"placeholder://?type=user-avatar&w=%d&h=%d&uid=%" PRId32 "", (int)size.width, (int)size.height, (int32_t)uid];
+    if (!TGStringCompare([self currentUrl], placeholderUri))
+        [super loadImage:placeholderUri filter:nil placeholder:placeholder];
+    
+    _label.hidden = false;
+}
+
+typedef struct
+{
+    int top;
+    int bottom;
+} TGGradientColors;
+
+- (void)loadGroupPlaceholderWithSize:(CGSize)size conversationId:(int64_t)conversationId title:(NSString *)title placeholder:(UIImage *)placeholder
+{
+    _label.font = _singleFont;
+    _usingSingleFont = true;
+    
+    NSString *cleanTitle = [self _cleanedUpString:title];
+    _label.text = cleanTitle.length >= 1 ? [cleanTitle substringToIndex:1] : @" ";
+    
+    if (conversationId == 0)
+        _label.textColor = [UIColor whiteColor];
+    else
+        _label.textColor = [UIColor whiteColor];
+    
+    [_label sizeToFit];
+    CGSize labelSize = _label.frame.size;
+    CGSize boundsSize = self.bounds.size;
+    labelSize.height = boundsSize.height;
+    _label.frame = CGRectMake(TGRetinaFloor((boundsSize.width - labelSize.width) / 2.0f), CGFloor((boundsSize.height - labelSize.height) / 2.0f), labelSize.width, labelSize.height);
+    
+    [super loadImage:[[NSString alloc] initWithFormat:@"placeholder://?type=group-avatar&w=%d&h=%d&cid=%" PRId64 "", (int)size.width, (int)size.height, conversationId] filter:nil placeholder:placeholder];
+    
+    _label.hidden = false;
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    CGSize labelSize = _label.frame.size;
+    CGSize boundsSize = self.bounds.size;
+    labelSize.height = boundsSize.height;
+    _label.frame = CGRectMake(TGScreenPixelFloor((boundsSize.width - labelSize.width) / 2.0f), TGScreenPixelFloor((boundsSize.height - labelSize.height) / 2.0f), labelSize.width, labelSize.height);
+}
+
+@end