/** * Copyright (c) 2015-present, Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD-style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. */ #import "RCTTextField.h" #import "RCTConvert.h" #import "RCTEventDispatcher.h" #import "RCTUtils.h" #import "RCTTextSelection.h" #import "UIView+React.h" @implementation RCTTextField { RCTEventDispatcher *_eventDispatcher; BOOL _jsRequestingFirstResponder; NSInteger _nativeEventCount; BOOL _submitted; UITextRange *_previousSelectionRange; } - (instancetype)initWithEventDispatcher:(RCTEventDispatcher *)eventDispatcher { if ((self = [super initWithFrame:CGRectZero])) { RCTAssert(eventDispatcher, @"eventDispatcher is a required parameter"); _eventDispatcher = eventDispatcher; [self addTarget:self action:@selector(textFieldDidChange) forControlEvents:UIControlEventEditingChanged]; [self addTarget:self action:@selector(textFieldBeginEditing) forControlEvents:UIControlEventEditingDidBegin]; [self addTarget:self action:@selector(textFieldEndEditing) forControlEvents:UIControlEventEditingDidEnd]; [self addTarget:self action:@selector(textFieldSubmitEditing) forControlEvents:UIControlEventEditingDidEndOnExit]; [self addObserver:self forKeyPath:@"selectedTextRange" options:0 context:nil]; _blurOnSubmit = YES; } return self; } - (void)dealloc { [self removeObserver:self forKeyPath:@"selectedTextRange"]; } RCT_NOT_IMPLEMENTED(- (instancetype)initWithFrame:(CGRect)frame) RCT_NOT_IMPLEMENTED(- (instancetype)initWithCoder:(NSCoder *)aDecoder) - (void)sendKeyValueForString:(NSString *)string { [_eventDispatcher sendTextEventWithType:RCTTextEventTypeKeyPress reactTag:self.reactTag text:nil key:string eventCount:_nativeEventCount]; } // This method is overridden for `onKeyPress`. The manager // will not send a keyPress for text that was pasted. - (void)paste:(id)sender { _textWasPasted = YES; [super paste:sender]; } - (void)setSelection:(RCTTextSelection *)selection { if (!selection) { return; } UITextRange *currentSelection = self.selectedTextRange; UITextPosition *start = [self positionFromPosition:self.beginningOfDocument offset:selection.start]; UITextPosition *end = [self positionFromPosition:self.beginningOfDocument offset:selection.end]; UITextRange *selectedTextRange = [self textRangeFromPosition:start toPosition:end]; NSInteger eventLag = _nativeEventCount - _mostRecentEventCount; if (eventLag == 0 && ![currentSelection isEqual:selectedTextRange]) { _previousSelectionRange = selectedTextRange; self.selectedTextRange = selectedTextRange; } else if (eventLag > RCTTextUpdateLagWarningThreshold) { RCTLogWarn(@"Native TextInput(%@) is %zd events ahead of JS - try to make your JS faster.", self.text, eventLag); } } - (void)setText:(NSString *)text { NSInteger eventLag = _nativeEventCount - _mostRecentEventCount; if (eventLag == 0 && ![text isEqualToString:self.text]) { UITextRange *selection = self.selectedTextRange; NSInteger oldTextLength = self.text.length; super.text = text; if (selection.empty) { // maintain cursor position relative to the end of the old text NSInteger offsetStart = [self offsetFromPosition:self.beginningOfDocument toPosition:selection.start]; NSInteger offsetFromEnd = oldTextLength - offsetStart; NSInteger newOffset = text.length - offsetFromEnd; UITextPosition *position = [self positionFromPosition:self.beginningOfDocument offset:newOffset]; self.selectedTextRange = [self textRangeFromPosition:position toPosition:position]; } } else if (eventLag > RCTTextUpdateLagWarningThreshold) { RCTLogWarn(@"Native TextInput(%@) is %zd events ahead of JS - try to make your JS faster.", self.text, eventLag); } } static void RCTUpdatePlaceholder(RCTTextField *self) { if (self.placeholder.length > 0 && self.placeholderTextColor) { self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeholder attributes:@{ NSForegroundColorAttributeName : self.placeholderTextColor }]; } else if (self.placeholder.length) { self.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeholder]; } } - (void)setPlaceholderTextColor:(UIColor *)placeholderTextColor { _placeholderTextColor = placeholderTextColor; RCTUpdatePlaceholder(self); } - (void)setPlaceholder:(NSString *)placeholder { super.placeholder = placeholder; RCTUpdatePlaceholder(self); } - (CGRect)caretRectForPosition:(UITextPosition *)position { if (_caretHidden) { return CGRectZero; } return [super caretRectForPosition:position]; } - (CGRect)textRectForBounds:(CGRect)bounds { CGRect rect = [super textRectForBounds:bounds]; return UIEdgeInsetsInsetRect(rect, _contentInset); } - (CGRect)editingRectForBounds:(CGRect)bounds { return [self textRectForBounds:bounds]; } - (void)setAutoCorrect:(BOOL)autoCorrect { self.autocorrectionType = (autoCorrect ? UITextAutocorrectionTypeYes : UITextAutocorrectionTypeNo); } - (BOOL)autoCorrect { return self.autocorrectionType == UITextAutocorrectionTypeYes; } - (void)textFieldDidChange { _nativeEventCount++; [_eventDispatcher sendTextEventWithType:RCTTextEventTypeChange reactTag:self.reactTag text:self.text key:nil eventCount:_nativeEventCount]; // selectedTextRange observer isn't triggered when you type even though the // cursor position moves, so we send event again here. [self sendSelectionEvent]; } - (void)textFieldEndEditing { [_eventDispatcher sendTextEventWithType:RCTTextEventTypeEnd reactTag:self.reactTag text:self.text key:nil eventCount:_nativeEventCount]; } - (void)textFieldSubmitEditing { _submitted = YES; [_eventDispatcher sendTextEventWithType:RCTTextEventTypeSubmit reactTag:self.reactTag text:self.text key:nil eventCount:_nativeEventCount]; } - (void)textFieldBeginEditing { [_eventDispatcher sendTextEventWithType:RCTTextEventTypeFocus reactTag:self.reactTag text:self.text key:nil eventCount:_nativeEventCount]; dispatch_async(dispatch_get_main_queue(), ^{ if (self->_selectTextOnFocus) { [self selectAll:nil]; } [self sendSelectionEvent]; }); } - (BOOL)textFieldShouldEndEditing:(RCTTextField *)textField { if (_submitted) { _submitted = NO; return _blurOnSubmit; } return YES; } - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(RCTTextField *)textField change:(NSDictionary *)change context:(void *)context { if ([keyPath isEqualToString:@"selectedTextRange"]) { [self sendSelectionEvent]; } } - (void)sendSelectionEvent { if (_onSelectionChange && self.selectedTextRange != _previousSelectionRange && ![self.selectedTextRange isEqual:_previousSelectionRange]) { _previousSelectionRange = self.selectedTextRange; UITextRange *selection = self.selectedTextRange; NSInteger start = [self offsetFromPosition:[self beginningOfDocument] toPosition:selection.start]; NSInteger end = [self offsetFromPosition:[self beginningOfDocument] toPosition:selection.end]; _onSelectionChange(@{ @"selection": @{ @"start": @(start), @"end": @(end), }, }); } } - (BOOL)canBecomeFirstResponder { return _jsRequestingFirstResponder; } - (void)reactWillMakeFirstResponder { _jsRequestingFirstResponder = YES; } - (void)reactDidMakeFirstResponder { _jsRequestingFirstResponder = NO; } - (BOOL)resignFirstResponder { BOOL result = [super resignFirstResponder]; if (result) { [_eventDispatcher sendTextEventWithType:RCTTextEventTypeBlur reactTag:self.reactTag text:self.text key:nil eventCount:_nativeEventCount]; } return result; } @end