fix: properly handle placeholder insets

Author: IvanIhnatsiuk

ios/inputTextView/InputTextView.mm

@@ -15,16 +15,16 @@ static inline BOOL CGSizeAlmostEqual(CGSize firstSize, CGSize secondSize,
 }
 
 @implementation InputTextView {
-  UILabel *placeholderView;
+  UILabel *_placeholderView;
   CGSize _lastCommittedSize;
 };
 
 - (instancetype)initWithFrame:(CGRect)frame {
   if ((self = [super initWithFrame:frame])) {
-    placeholderView = [[UILabel alloc] initWithFrame:self.bounds];
-    placeholderView.isAccessibilityElement = NO;
-    placeholderView.numberOfLines = 0;
-    [self addSubview:placeholderView];
+    _placeholderView = [[UILabel alloc] initWithFrame:self.bounds];
+    _placeholderView.isAccessibilityElement = NO;
+    _placeholderView.numberOfLines = 0;
+    [self addSubview:_placeholderView];
 
     self.textContainer.lineFragmentPadding = 0;
     self.scrollEnabled = YES;
@@ -185,7 +185,7 @@ - (void)updatePlaceholderVisibility {
   BOOL shouldShow =
       self.placeholderText.length > 0 && self.textStorage.length == 0;
 
-  placeholderView.hidden = !shouldShow;
+  _placeholderView.hidden = !shouldShow;
 }
 
 - (void)setText:(NSString *)text {
@@ -209,7 +209,7 @@ - (void)setPlaceholderText:(NSString *)newPlaceholderText {
   NSMutableDictionary *attributes =
       [typedInput->defaultTypingAttributes mutableCopy];
   attributes[NSForegroundColorAttributeName] = _placeholderColor;
-  placeholderView.attributedText =
+  _placeholderView.attributedText =
       [[NSAttributedString alloc] initWithString:placeholderText
                                       attributes:attributes];
   [self setNeedsLayout];
@@ -220,13 +220,20 @@ - (void)layoutSubviews {
 
   CGRect textFrame =
       UIEdgeInsetsInsetRect(self.bounds, self.textContainerInset);
+
   CGFloat placeholderHeight =
-      [placeholderView sizeThatFits:textFrame.size].height;
+      [_placeholderView sizeThatFits:textFrame.size].height;
+
   textFrame.size.height = MIN(placeholderHeight, textFrame.size.height);
-  placeholderView.frame = textFrame;
-  CGSize newSize =
-      [self.layoutManager usedRectForTextContainer:self.textContainer].size;
-  if (CGSizeAlmostEqual(newSize, _lastCommittedSize, Epsilon)) {
+
+  _placeholderView.frame = textFrame;
+
+  CGRect usedRect =
+      [self.layoutManager usedRectForTextContainer:self.textContainer];
+
+  CGSize newSize = usedRect.size;
+
+  if (CGSizeAlmostEqual(newSize, _lastCommittedSize, 0.5)) {
     return;
   }