mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-04-23 11:57:46 +08:00
Better TextInput: RCTUITextView was decoupled in separate file and now handles placeholder feature
Reviewed By: mmmulani Differential Revision: D4663151 fbshipit-source-id: ce57ca4bebf4676df2ae5e586a1b175ec2aac760
This commit is contained in:
Valentin Shergin
committed by
Facebook Github Bot
Facebook Github Bot
parent
26e2c08544
commit
b53d76efb7
@@ -27,6 +27,8 @@
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58B511D01A9E6C5C00147676 /* RCTShadowText.m in Sources */ = {isa = PBXBuildFile; fileRef = 58B511CB1A9E6C5C00147676 /* RCTShadowText.m */; };
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58B511D11A9E6C5C00147676 /* RCTTextManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 58B511CD1A9E6C5C00147676 /* RCTTextManager.m */; };
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58B512161A9E6EFF00147676 /* RCTText.m in Sources */ = {isa = PBXBuildFile; fileRef = 58B512141A9E6EFF00147676 /* RCTText.m */; };
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59B125C91E6E4E15004E2A67 /* RCTUITextView.m in Sources */ = {isa = PBXBuildFile; fileRef = 59B125C81E6E4E15004E2A67 /* RCTUITextView.m */; };
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59B125CA1E6E4E15004E2A67 /* RCTUITextView.m in Sources */ = {isa = PBXBuildFile; fileRef = 59B125C81E6E4E15004E2A67 /* RCTUITextView.m */; };
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59F60E911E661BDD0081153B /* RCTShadowTextField.m in Sources */ = {isa = PBXBuildFile; fileRef = 59F60E8E1E661BDD0081153B /* RCTShadowTextField.m */; };
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59F60E921E661BDD0081153B /* RCTShadowTextField.m in Sources */ = {isa = PBXBuildFile; fileRef = 59F60E8E1E661BDD0081153B /* RCTShadowTextField.m */; };
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59F60E931E661BDD0081153B /* RCTShadowTextView.m in Sources */ = {isa = PBXBuildFile; fileRef = 59F60E901E661BDD0081153B /* RCTShadowTextView.m */; };
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@@ -58,6 +60,8 @@
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58B511CD1A9E6C5C00147676 /* RCTTextManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTTextManager.m; sourceTree = "<group>"; };
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58B512141A9E6EFF00147676 /* RCTText.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTText.m; sourceTree = "<group>"; };
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58B512151A9E6EFF00147676 /* RCTText.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTText.h; sourceTree = "<group>"; };
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59B125C71E6E4E15004E2A67 /* RCTUITextView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTUITextView.h; sourceTree = "<group>"; };
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59B125C81E6E4E15004E2A67 /* RCTUITextView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTUITextView.m; sourceTree = "<group>"; };
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59F60E8D1E661BDD0081153B /* RCTShadowTextField.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTShadowTextField.h; sourceTree = "<group>"; };
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59F60E8E1E661BDD0081153B /* RCTShadowTextField.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTShadowTextField.m; sourceTree = "<group>"; };
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59F60E8F1E661BDD0081153B /* RCTShadowTextView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTShadowTextView.h; sourceTree = "<group>"; };
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@@ -97,6 +101,8 @@
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131B6ABD1AF0CD0600FFC3E0 /* RCTTextView.m */,
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131B6ABE1AF0CD0600FFC3E0 /* RCTTextViewManager.h */,
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131B6ABF1AF0CD0600FFC3E0 /* RCTTextViewManager.m */,
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59B125C71E6E4E15004E2A67 /* RCTUITextView.h */,
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59B125C81E6E4E15004E2A67 /* RCTUITextView.m */,
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);
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indentWidth = 2;
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sourceTree = "<group>";
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@@ -194,6 +200,7 @@
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2D3B5F341D9B103100451313 /* RCTRawTextManager.m in Sources */,
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59F60E921E661BDD0081153B /* RCTShadowTextField.m in Sources */,
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AF3225FA1DE5574F00D3E7E7 /* RCTConvert+Text.m in Sources */,
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59B125CA1E6E4E15004E2A67 /* RCTUITextView.m in Sources */,
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2D3B5F3C1D9B106F00451313 /* RCTTextViewManager.m in Sources */,
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59F60E941E661BDD0081153B /* RCTShadowTextView.m in Sources */,
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2D3B5F331D9B102D00451313 /* RCTTextSelection.m in Sources */,
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@@ -214,6 +221,7 @@
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1362F1011B4D51F400E06D8C /* RCTTextFieldManager.m in Sources */,
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59F60E911E661BDD0081153B /* RCTShadowTextField.m in Sources */,
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AF3225F91DE5574F00D3E7E7 /* RCTConvert+Text.m in Sources */,
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59B125C91E6E4E15004E2A67 /* RCTUITextView.m in Sources */,
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131B6AC11AF0CD0600FFC3E0 /* RCTTextViewManager.m in Sources */,
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59F60E931E661BDD0081153B /* RCTShadowTextView.m in Sources */,
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58B511CF1A9E6C5C00147676 /* RCTShadowRawText.m in Sources */,
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@@ -25,6 +25,7 @@
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@property (nonatomic, assign) BOOL automaticallyAdjustContentInsets;
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@property (nonatomic, copy) NSString *text;
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@property (nonatomic, strong) UIColor *placeholderTextColor;
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@property (nonatomic, copy) NSString *placeholder;
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@property (nonatomic, strong) UIFont *font;
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@property (nonatomic, assign) NSInteger mostRecentEventCount;
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@property (nonatomic, strong) NSNumber *maxLength;
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@@ -18,64 +18,14 @@
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#import "RCTShadowText.h"
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#import "RCTText.h"
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#import "RCTTextSelection.h"
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@interface RCTUITextView : UITextView
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@property (nonatomic, assign) BOOL textWasPasted;
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@end
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@implementation RCTUITextView
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{
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BOOL _jsRequestingFirstResponder;
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}
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- (void)paste:(id)sender
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{
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_textWasPasted = YES;
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[super paste:sender];
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}
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- (void)reactWillMakeFirstResponder
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{
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_jsRequestingFirstResponder = YES;
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}
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- (BOOL)canBecomeFirstResponder
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{
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return _jsRequestingFirstResponder;
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}
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- (void)reactDidMakeFirstResponder
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{
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_jsRequestingFirstResponder = NO;
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}
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- (void)didMoveToWindow
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{
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if (_jsRequestingFirstResponder) {
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[self becomeFirstResponder];
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[self reactDidMakeFirstResponder];
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}
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}
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- (void)setContentOffset:(CGPoint)contentOffset animated:(__unused BOOL)animated
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{
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// Turning off scroll animation.
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// This fixes the problem also known as "flaky scrolling".
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[super setContentOffset:contentOffset animated:NO];
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}
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@end
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#import "RCTUITextView.h"
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@implementation RCTTextView
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{
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RCTBridge *_bridge;
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RCTEventDispatcher *_eventDispatcher;
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NSString *_placeholder;
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UITextView *_placeholderView;
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UITextView *_textView;
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RCTUITextView *_textView;
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RCTText *_richTextView;
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NSAttributedString *_pendingAttributedText;
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@@ -99,7 +49,6 @@
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_contentInset = UIEdgeInsetsZero;
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_bridge = bridge;
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_eventDispatcher = bridge.eventDispatcher;
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_placeholderTextColor = [self defaultPlaceholderTextColor];
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_blurOnSubmit = NO;
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_textView = [[RCTUITextView alloc] initWithFrame:self.bounds];
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@@ -241,39 +190,12 @@ static NSAttributedString *removeReactTagFromString(NSAttributedString *string)
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[_textView layoutIfNeeded];
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[self updatePlaceholderVisibility];
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[self invalidateContentSize];
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_blockTextShouldChange = NO;
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}
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- (void)updatePlaceholder
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{
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[_placeholderView removeFromSuperview];
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_placeholderView = nil;
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if (_placeholder) {
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_placeholderView = [[UITextView alloc] initWithFrame:_textView.frame];
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_placeholderView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
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_placeholderView.textContainer.lineFragmentPadding = 0;
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_placeholderView.userInteractionEnabled = NO;
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_placeholderView.backgroundColor = [UIColor clearColor];
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_placeholderView.scrollEnabled = NO;
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#if !TARGET_OS_TV
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_placeholderView.editable = NO;
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_placeholderView.scrollsToTop = NO;
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#endif
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_placeholderView.attributedText =
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[[NSAttributedString alloc] initWithString:_placeholder attributes:@{
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NSFontAttributeName : (_textView.font ? _textView.font : [self defaultPlaceholderFont]),
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NSForegroundColorAttributeName : _placeholderTextColor
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}];
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_placeholderView.textAlignment = _textView.textAlignment;
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[self insertSubview:_placeholderView belowSubview:_textView];
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[self updatePlaceholderVisibility];
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}
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}
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#pragma mark - Properties
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- (UIFont *)font
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{
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@@ -283,40 +205,110 @@ static NSAttributedString *removeReactTagFromString(NSAttributedString *string)
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- (void)setFont:(UIFont *)font
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{
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_textView.font = font;
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[self updatePlaceholder];
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}
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- (void)setPlaceholder:(NSString *)placeholder
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{
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_placeholder = placeholder;
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[self updatePlaceholder];
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}
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- (void)setPlaceholderTextColor:(UIColor *)placeholderTextColor
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{
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if (placeholderTextColor) {
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_placeholderTextColor = placeholderTextColor;
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} else {
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_placeholderTextColor = [self defaultPlaceholderTextColor];
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}
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[self updatePlaceholder];
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}
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- (void)setContentInset:(UIEdgeInsets)contentInset
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{
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_contentInset = contentInset;
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_textView.textContainerInset = contentInset;
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_placeholderView.textContainerInset = contentInset;
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[self setNeedsLayout];
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}
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- (void)setSelection:(RCTTextSelection *)selection
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{
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if (!selection) {
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return;
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}
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UITextRange *currentSelection = _textView.selectedTextRange;
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UITextPosition *start = [_textView positionFromPosition:_textView.beginningOfDocument offset:selection.start];
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UITextPosition *end = [_textView positionFromPosition:_textView.beginningOfDocument offset:selection.end];
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UITextRange *selectedTextRange = [_textView textRangeFromPosition:start toPosition:end];
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NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
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if (eventLag == 0 && ![currentSelection isEqual:selectedTextRange]) {
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_previousSelectionRange = selectedTextRange;
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_textView.selectedTextRange = selectedTextRange;
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} else if (eventLag > RCTTextUpdateLagWarningThreshold) {
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RCTLogWarn(@"Native TextInput(%@) is %zd events ahead of JS - try to make your JS faster.", self.text, eventLag);
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}
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}
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- (NSString *)text
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{
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return _textView.text;
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}
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- (void)setText:(NSString *)text
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{
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NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
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if (eventLag == 0 && ![text isEqualToString:_textView.text]) {
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UITextRange *selection = _textView.selectedTextRange;
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NSInteger oldTextLength = _textView.text.length;
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_predictedText = text;
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_textView.text = text;
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if (selection.empty) {
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// maintain cursor position relative to the end of the old text
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NSInteger start = [_textView offsetFromPosition:_textView.beginningOfDocument toPosition:selection.start];
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NSInteger offsetFromEnd = oldTextLength - start;
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NSInteger newOffset = text.length - offsetFromEnd;
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UITextPosition *position = [_textView positionFromPosition:_textView.beginningOfDocument offset:newOffset];
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_textView.selectedTextRange = [_textView textRangeFromPosition:position toPosition:position];
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}
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[self invalidateContentSize];
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} else if (eventLag > RCTTextUpdateLagWarningThreshold) {
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RCTLogWarn(@"Native TextInput(%@) is %zd events ahead of JS - try to make your JS faster.", self.text, eventLag);
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}
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}
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- (NSString *)placeholder
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{
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return _textView.placeholderText;
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}
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- (void)setPlaceholder:(NSString *)placeholder
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{
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_textView.placeholderText = placeholder;
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}
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- (UIColor *)placeholderTextColor
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{
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return _textView.placeholderTextColor;
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}
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- (void)setPlaceholderTextColor:(UIColor *)placeholderTextColor
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{
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_textView.placeholderTextColor = placeholderTextColor;
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}
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- (void)setAutocorrectionType:(UITextAutocorrectionType)autocorrectionType
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{
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_textView.autocorrectionType = autocorrectionType;
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}
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- (UITextAutocorrectionType)autocorrectionType
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{
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return _textView.autocorrectionType;
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}
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- (void)setSpellCheckingType:(UITextSpellCheckingType)spellCheckingType
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{
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_textView.spellCheckingType = spellCheckingType;
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}
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- (UITextSpellCheckingType)spellCheckingType
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{
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return _textView.spellCheckingType;
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}
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#pragma mark - UITextViewDelegate
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- (BOOL)textView:(RCTUITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
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{
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if (textView.textWasPasted) {
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textView.textWasPasted = NO;
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} else {
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if (!textView.textWasPasted) {
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[_eventDispatcher sendTextEventWithType:RCTTextEventTypeKeyPress
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reactTag:self.reactTag
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text:nil
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@@ -425,86 +417,6 @@ static NSAttributedString *removeReactTagFromString(NSAttributedString *string)
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}
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}
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- (NSString *)text
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{
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return _textView.text;
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}
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- (void)setSelection:(RCTTextSelection *)selection
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{
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if (!selection) {
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return;
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}
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UITextRange *currentSelection = _textView.selectedTextRange;
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UITextPosition *start = [_textView positionFromPosition:_textView.beginningOfDocument offset:selection.start];
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UITextPosition *end = [_textView positionFromPosition:_textView.beginningOfDocument offset:selection.end];
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UITextRange *selectedTextRange = [_textView textRangeFromPosition:start toPosition:end];
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NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
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if (eventLag == 0 && ![currentSelection isEqual:selectedTextRange]) {
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_previousSelectionRange = selectedTextRange;
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_textView.selectedTextRange = selectedTextRange;
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} else if (eventLag > RCTTextUpdateLagWarningThreshold) {
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RCTLogWarn(@"Native TextInput(%@) is %zd events ahead of JS - try to make your JS faster.", self.text, eventLag);
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}
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}
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- (void)setText:(NSString *)text
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{
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NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
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if (eventLag == 0 && ![text isEqualToString:_textView.text]) {
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UITextRange *selection = _textView.selectedTextRange;
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NSInteger oldTextLength = _textView.text.length;
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_predictedText = text;
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_textView.text = text;
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if (selection.empty) {
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// maintain cursor position relative to the end of the old text
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NSInteger start = [_textView offsetFromPosition:_textView.beginningOfDocument toPosition:selection.start];
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NSInteger offsetFromEnd = oldTextLength - start;
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NSInteger newOffset = text.length - offsetFromEnd;
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UITextPosition *position = [_textView positionFromPosition:_textView.beginningOfDocument offset:newOffset];
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_textView.selectedTextRange = [_textView textRangeFromPosition:position toPosition:position];
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}
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[self updatePlaceholderVisibility];
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[self invalidateContentSize];
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} else if (eventLag > RCTTextUpdateLagWarningThreshold) {
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RCTLogWarn(@"Native TextInput(%@) is %zd events ahead of JS - try to make your JS faster.", self.text, eventLag);
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}
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}
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- (void)updatePlaceholderVisibility
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{
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if (_textView.text.length > 0) {
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[_placeholderView setHidden:YES];
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} else {
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[_placeholderView setHidden:NO];
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}
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}
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- (void)setAutocorrectionType:(UITextAutocorrectionType)autocorrectionType
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{
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_textView.autocorrectionType = autocorrectionType;
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}
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- (UITextAutocorrectionType)autocorrectionType
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{
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return _textView.autocorrectionType;
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}
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- (void)setSpellCheckingType:(UITextSpellCheckingType)spellCheckingType
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{
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_textView.spellCheckingType = spellCheckingType;
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}
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- (UITextSpellCheckingType)spellCheckingType
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{
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return _textView.spellCheckingType;
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}
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- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
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{
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if (_selectTextOnFocus) {
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@@ -519,7 +431,6 @@ static NSAttributedString *removeReactTagFromString(NSAttributedString *string)
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{
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if (_clearTextOnFocus) {
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_textView.text = @"";
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[self updatePlaceholderVisibility];
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}
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[_eventDispatcher sendTextEventWithType:RCTTextEventTypeFocus
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@@ -560,7 +471,6 @@ static BOOL findMismatch(NSString *first, NSString *second, NSRange *firstRange,
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- (void)textViewDidChange:(UITextView *)textView
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{
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[self updatePlaceholderVisibility];
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[self invalidateContentSize];
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// Detect when textView updates happend that didn't invoke `shouldChangeTextInRange`
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@@ -580,6 +490,7 @@ static BOOL findMismatch(NSString *first, NSString *second, NSRange *firstRange,
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_nativeUpdatesInFlight = NO;
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_nativeEventCount++;
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// TODO: t16435709 This part will be removed soon.
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if (!self.reactTag || !_onChange) {
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return;
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}
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@@ -718,18 +629,6 @@ static BOOL findMismatch(NSString *first, NSString *second, NSRange *firstRange,
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[self invalidateContentSize];
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}
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#pragma mark - Default values
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- (UIFont *)defaultPlaceholderFont
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{
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return [UIFont systemFontOfSize:17];
|
||||
}
|
||||
|
||||
- (UIColor *)defaultPlaceholderTextColor
|
||||
{
|
||||
return [UIColor colorWithRed:0.0/255.0 green:0.0/255.0 blue:0.098/255.0 alpha:0.22];
|
||||
}
|
||||
|
||||
#pragma mark - UIScrollViewDelegate
|
||||
|
||||
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
|
||||
|
||||
28
Libraries/Text/RCTUITextView.h
Normal file
28
Libraries/Text/RCTUITextView.h
Normal file
@@ -0,0 +1,28 @@
|
||||
/**
|
||||
* 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 <UIKit/UIKit.h>
|
||||
|
||||
NS_ASSUME_NONNULL_BEGIN
|
||||
|
||||
/*
|
||||
* Just regular UITextView... but much better!
|
||||
*/
|
||||
@interface RCTUITextView : UITextView
|
||||
|
||||
- (instancetype)initWithFrame:(CGRect)frame textContainer:(nullable NSTextContainer *)textContainer NS_UNAVAILABLE;
|
||||
- (instancetype)initWithCoder:(NSCoder *)aDecoder NS_UNAVAILABLE;
|
||||
|
||||
@property (nonatomic, assign, readonly) BOOL textWasPasted;
|
||||
@property (nonatomic, copy, nullable) NSString *placeholderText;
|
||||
@property (nonatomic, assign, nullable) UIColor *placeholderTextColor;
|
||||
|
||||
@end
|
||||
|
||||
NS_ASSUME_NONNULL_END
|
||||
189
Libraries/Text/RCTUITextView.m
Normal file
189
Libraries/Text/RCTUITextView.m
Normal file
@@ -0,0 +1,189 @@
|
||||
/**
|
||||
* 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 "RCTUITextView.h"
|
||||
|
||||
@implementation RCTUITextView
|
||||
{
|
||||
BOOL _jsRequestingFirstResponder;
|
||||
UILabel *_placeholderView;
|
||||
UITextView *_detachedTextView;
|
||||
}
|
||||
|
||||
static UIFont *defaultPlaceholderFont()
|
||||
{
|
||||
return [UIFont systemFontOfSize:17];
|
||||
}
|
||||
|
||||
static UIColor *defaultPlaceholderTextColor()
|
||||
{
|
||||
// Default placeholder color from UITextField.
|
||||
return [UIColor colorWithRed:0 green:0 blue:0.0980392 alpha:0.22];
|
||||
}
|
||||
|
||||
- (instancetype)initWithFrame:(CGRect)frame
|
||||
{
|
||||
if (self = [super initWithFrame:frame]) {
|
||||
[[NSNotificationCenter defaultCenter] addObserver:self
|
||||
selector:@selector(textDidChange)
|
||||
name:UITextViewTextDidChangeNotification
|
||||
object:self];
|
||||
|
||||
_placeholderView = [[UILabel alloc] initWithFrame:self.bounds];
|
||||
_placeholderView.hidden = YES;
|
||||
_placeholderView.isAccessibilityElement = NO;
|
||||
_placeholderView.numberOfLines = 0;
|
||||
[self addSubview:_placeholderView];
|
||||
}
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
- (void)dealloc
|
||||
{
|
||||
[[NSNotificationCenter defaultCenter] removeObserver:self];
|
||||
}
|
||||
|
||||
#pragma mark - Properties
|
||||
|
||||
- (void)setPlaceholderText:(NSString *)placeholderText
|
||||
{
|
||||
_placeholderText = placeholderText;
|
||||
[self invalidatePlaceholder];
|
||||
}
|
||||
|
||||
- (void)setPlaceholderTextColor:(UIColor *)placeholderTextColor
|
||||
{
|
||||
_placeholderTextColor = placeholderTextColor;
|
||||
[self invalidatePlaceholder];
|
||||
}
|
||||
|
||||
|
||||
- (void)textDidChange
|
||||
{
|
||||
_textWasPasted = NO;
|
||||
[self invalidatePlaceholder];
|
||||
}
|
||||
|
||||
#pragma mark - UIResponder
|
||||
|
||||
- (void)reactWillMakeFirstResponder
|
||||
{
|
||||
_jsRequestingFirstResponder = YES;
|
||||
}
|
||||
|
||||
- (BOOL)canBecomeFirstResponder
|
||||
{
|
||||
return _jsRequestingFirstResponder;
|
||||
}
|
||||
|
||||
- (void)reactDidMakeFirstResponder
|
||||
{
|
||||
_jsRequestingFirstResponder = NO;
|
||||
}
|
||||
|
||||
- (void)didMoveToWindow
|
||||
{
|
||||
if (_jsRequestingFirstResponder) {
|
||||
[self becomeFirstResponder];
|
||||
[self reactDidMakeFirstResponder];
|
||||
}
|
||||
}
|
||||
|
||||
#pragma mark - Overrides
|
||||
|
||||
- (void)setFont:(UIFont *)font
|
||||
{
|
||||
[super setFont:font];
|
||||
[self invalidatePlaceholder];
|
||||
}
|
||||
|
||||
- (void)setText:(NSString *)text
|
||||
{
|
||||
[super setText:text];
|
||||
[self textDidChange];
|
||||
}
|
||||
|
||||
- (void)setAttributedText:(NSAttributedString *)attributedText
|
||||
{
|
||||
[super setAttributedText:attributedText];
|
||||
[self textDidChange];
|
||||
}
|
||||
|
||||
- (void)paste:(id)sender
|
||||
{
|
||||
[super paste:sender];
|
||||
_textWasPasted = YES;
|
||||
}
|
||||
|
||||
- (void)setContentOffset:(CGPoint)contentOffset animated:(__unused BOOL)animated
|
||||
{
|
||||
// Turning off scroll animation.
|
||||
// This fixes the problem also known as "flaky scrolling".
|
||||
[super setContentOffset:contentOffset animated:NO];
|
||||
}
|
||||
|
||||
#pragma mark - Layout
|
||||
|
||||
- (void)layoutSubviews
|
||||
{
|
||||
[super layoutSubviews];
|
||||
|
||||
CGRect textFrame = UIEdgeInsetsInsetRect(self.bounds, self.textContainerInset);
|
||||
CGFloat placeholderHeight = [_placeholderView sizeThatFits:textFrame.size].height;
|
||||
textFrame.size.height = MIN(placeholderHeight, textFrame.size.height);
|
||||
_placeholderView.frame = textFrame;
|
||||
}
|
||||
|
||||
- (CGSize)sizeThatFits:(CGSize)size
|
||||
{
|
||||
// UITextView on iOS 8 has a bug that automatically scrolls to the top
|
||||
// when calling `sizeThatFits:`. Use a copy so that self is not screwed up.
|
||||
static BOOL useCustomImplementation = NO;
|
||||
static dispatch_once_t onceToken;
|
||||
dispatch_once(&onceToken, ^{
|
||||
useCustomImplementation = ![[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){9,0,0}];
|
||||
});
|
||||
|
||||
if (!useCustomImplementation) {
|
||||
return [super sizeThatFits:size];
|
||||
}
|
||||
|
||||
if (!_detachedTextView) {
|
||||
_detachedTextView = [UITextView new];
|
||||
}
|
||||
|
||||
_detachedTextView.attributedText = self.attributedText;
|
||||
_detachedTextView.font = self.font;
|
||||
_detachedTextView.textContainerInset = self.textContainerInset;
|
||||
|
||||
return [_detachedTextView sizeThatFits:size];
|
||||
}
|
||||
|
||||
#pragma mark - Placeholder
|
||||
|
||||
- (void)invalidatePlaceholder
|
||||
{
|
||||
BOOL wasVisible = !_placeholderView.isHidden;
|
||||
BOOL isVisible = _placeholderText.length != 0 && self.text.length == 0;
|
||||
|
||||
if (wasVisible != isVisible) {
|
||||
_placeholderView.hidden = !isVisible;
|
||||
}
|
||||
|
||||
if (isVisible) {
|
||||
_placeholderView.font = self.font ?: defaultPlaceholderFont();
|
||||
_placeholderView.textColor = _placeholderTextColor ?: defaultPlaceholderTextColor();
|
||||
_placeholderView.textAlignment = self.textAlignment;
|
||||
_placeholderView.text = _placeholderText;
|
||||
[self setNeedsLayout];
|
||||
}
|
||||
}
|
||||
|
||||
@end
|
||||
Reference in New Issue
Block a user