Repo created

iphone/Maps/UI/Editor/Cells/MWMNoteCell.m

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+#import "MWMNoteCell.h"
+#import "MWMTextView.h"
+
+static CGFloat const kTopTextViewOffset = 12.;
+static NSString *const kTextViewContentSizeKeyPath = @"contentSize";
+static CGFloat const kMinimalTextViewHeight = 44.;
+static void *kContext = &kContext;
+
+@interface MWMNoteCell () <UITextViewDelegate>
+
+@property(nonatomic) IBOutlet MWMTextView *textView;
+@property(nonatomic) IBOutlet NSLayoutConstraint *textViewHeight;
+@property(weak, nonatomic) id<MWMNoteCellDelegate> delegate;
+
+@end
+
+@implementation MWMNoteCell
+
+- (void)configWithDelegate:(id<MWMNoteCellDelegate>)delegate
+                  noteText:(NSString *)text
+               placeholder:(NSString *)placeholder {
+  self.delegate = delegate;
+  self.textView.text = text;
+  self.textView.keyboardAppearance = [UIColor isNightMode] ? UIKeyboardAppearanceDark : UIKeyboardAppearanceDefault;
+  self.textView.placeholder = placeholder;
+}
+
+- (void)updateTextViewForHeight:(CGFloat)height {
+  id<MWMNoteCellDelegate> delegate = self.delegate;
+  if (height > kMinimalTextViewHeight) {
+    [delegate cell:self didChangeSizeAndText:self.textView.text];
+  }
+
+  [self setNeedsLayout];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary *)change
+                       context:(void *)context {
+  if (context == kContext) {
+    NSValue *s = change[NSKeyValueChangeNewKey];
+    CGFloat height = s.CGSizeValue.height;
+    [self updateTextViewForHeight:height];
+    return;
+  }
+
+  [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
+}
+
+- (CGFloat)cellHeight {
+  return self.textViewHeight.constant + 2 * kTopTextViewOffset;
+}
+
+- (CGFloat)textViewContentHeight {
+  return self.textView.contentSize.height;
+}
+
++ (CGFloat)minimalHeight {
+  return kMinimalTextViewHeight;
+}
+
+- (void)textViewDidEndEditing:(UITextView *)textView {
+  [self.delegate cell:self didFinishEditingWithText:textView.text];
+  [self unregisterObserver];
+}
+
+- (void)textViewDidBeginEditing:(UITextView *)textView {
+  [self registerObserver];
+}
+
+- (void)textViewDidChange:(UITextView *)textView {
+  [textView sizeToFit];
+}
+
+- (void)unregisterObserver {
+  [self.textView removeObserver:self forKeyPath:kTextViewContentSizeKeyPath context:kContext];
+}
+
+- (void)registerObserver {
+  [self.textView addObserver:self
+                  forKeyPath:kTextViewContentSizeKeyPath
+                     options:NSKeyValueObservingOptionNew
+                     context:kContext];
+}
+
+@end