| // Copyright 2016-present the Material Components for iOS authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #import "MDCTextInputCommonFundament.h" |
| |
| #import "MDCMultilineTextField.h" |
| #import "MDCMultilineTextInputDelegate.h" |
| #import "MDCTextField.h" |
| #import "MDCTextFieldPositioningDelegate.h" |
| #import "MDCTextInput.h" |
| #import "MDCTextInputArt.h" |
| #import "MDCTextInputBorderView.h" |
| #import "MDCTextInputCommonFundament.h" |
| #import "MDCTextInputUnderlineView.h" |
| |
| #import "MaterialAnimationTiming.h" |
| #import "MaterialMath.h" |
| #import "MaterialPalettes.h" |
| #import "MaterialTypography.h" |
| |
| static NSString *const MDCTextInputUnderlineKVOKeyColor = @"color"; |
| static NSString *const MDCTextInputUnderlineKVOKeyLineHeight = @"lineHeight"; |
| |
| const CGFloat MDCTextInputBorderRadius = 4; |
| static const CGFloat MDCTextInputClearButtonImageSquareWidthHeight = 24; |
| static const CGFloat MDCTextInputHintTextOpacity = (CGFloat)0.54; |
| static const CGFloat MDCTextInputOverlayViewToEditingRectPadding = 2; |
| const CGFloat MDCTextInputFullPadding = 16; |
| const CGFloat MDCTextInputHalfPadding = 8; |
| |
| UIColor *_Nonnull MDCTextInputCursorColor() { |
| return [MDCPalette bluePalette].accent700; |
| } |
| |
| static inline UIColor *MDCTextInputDefaultPlaceholderTextColor() { |
| return [UIColor colorWithWhite:0 alpha:MDCTextInputHintTextOpacity]; |
| } |
| |
| static inline UIColor *MDCTextInputTextColor() { |
| return [UIColor colorWithWhite:0 alpha:[MDCTypography body1FontOpacity]]; |
| } |
| |
| static inline UIColor *MDCTextInputUnderlineColor() { |
| return [UIColor lightGrayColor]; |
| } |
| |
| @interface MDCTextInputCommonFundament () { |
| BOOL _mdc_adjustsFontForContentSizeCategory; |
| } |
| |
| @property(nonatomic, assign) BOOL isRegisteredForKVO; |
| |
| @property(nonatomic, strong) NSLayoutConstraint *clearButtonCenterY; |
| @property(nonatomic, strong) NSLayoutConstraint *clearButtonTrailing; |
| @property(nonatomic, strong) NSLayoutConstraint *clearButtonWidth; |
| @property(nonatomic, strong) NSLayoutConstraint *leadingUnderlineLeading; |
| @property(nonatomic, strong) NSLayoutConstraint *trailingUnderlineTrailing; |
| @property(nonatomic, strong) NSLayoutConstraint *placeholderLeading; |
| @property(nonatomic, strong) NSLayoutConstraint *placeholderLeadingLeadingViewTrailing; |
| @property(nonatomic, strong) NSLayoutConstraint *placeholderTop; |
| @property(nonatomic, strong) NSLayoutConstraint *placeholderTrailing; |
| @property(nonatomic, strong) NSLayoutConstraint *placeholderTrailingTrailingViewLeading; |
| |
| @property(nonatomic, weak) UIView<MDCTextInput> *textInput; |
| |
| @end |
| |
| @implementation MDCTextInputCommonFundament |
| |
| // We never use the text property. Instead always read from the text field. |
| |
| @synthesize attributedText = _do_no_use_attributedText; |
| @synthesize borderPath = _borderPath; |
| @synthesize borderView = _borderView; |
| @synthesize clearButton = _clearButton; |
| @synthesize clearButtonMode = _clearButtonMode; |
| @synthesize enabled = _enabled; |
| @synthesize hidesPlaceholderOnInput = _hidesPlaceholderOnInput; |
| @synthesize leadingUnderlineLabel = _leadingUnderlineLabel; |
| @synthesize placeholderLabel = _placeholderLabel; |
| @synthesize positioningDelegate = _positioningDelegate; |
| @synthesize textColor = _textColor; |
| @synthesize trailingUnderlineLabel = _trailingUnderlineLabel; |
| @synthesize underline = _underline; |
| @synthesize textInsetsMode = _textInsetsMode; |
| |
| - (instancetype)init { |
| [self doesNotRecognizeSelector:_cmd]; |
| return nil; |
| } |
| |
| - (nonnull instancetype)initWithTextInput:(UIView<MDCTextInput> *_Nonnull)textInput { |
| self = [super init]; |
| if (self) { |
| _textInput = textInput; |
| |
| [self commonMDCTextInputCommonFundamentInit]; |
| |
| // This is the first call to the .textInput property. On MDCMultilineTextField, .textView is a |
| // failsafe, lazy var. It will create a .textView instance if there wasn't one on the ivar. |
| _textInput.font = [UIFont mdc_standardFontForMaterialTextStyle:MDCFontTextStyleBody1]; |
| // TODO: (#4331) This needs to be converted to the new text scheme. |
| |
| // Initialize elements of UI |
| [self setupPlaceholderLabel]; |
| |
| // setupClearButton must come after setupPlaceholderLabel because it will setup constraints that |
| // depend on the placeholderLabel |
| [self setupClearButton]; |
| [self setupUnderlineLabels]; |
| [self setupUnderlineView]; |
| |
| [self updateTextColor]; |
| [self mdc_setAdjustsFontForContentSizeCategory:NO]; |
| |
| [self setupBorder]; |
| [self subscribeForKVO]; |
| } |
| return self; |
| } |
| |
| - (instancetype)initWithCoder:(NSCoder *)aDecoder { |
| self = [super init]; |
| if (self) { |
| [self commonMDCTextInputCommonFundamentInit]; |
| |
| [self setupBorder]; |
| [self setupPlaceholderLabel]; |
| |
| // setupClearButton must come after setupPlaceholderLabel because it will setup constraints that |
| // depend on the placeholderLabel |
| [self setupClearButton]; |
| [self setupUnderlineLabels]; |
| [self setupUnderlineView]; |
| |
| [self subscribeForKVO]; |
| } |
| return self; |
| } |
| |
| - (instancetype)copyWithZone:(__unused NSZone *)zone { |
| MDCTextInputCommonFundament *copy = |
| [[MDCTextInputCommonFundament alloc] initWithTextInput:self.textInput]; |
| |
| copy.borderPath = self.borderPath.copy; |
| if ([self.borderView conformsToProtocol:@protocol(NSCopying)]) { |
| copy.borderView = self.borderView.copy; |
| } |
| copy.clearButtonMode = self.clearButtonMode; |
| copy.enabled = self.isEnabled; |
| copy.hidesPlaceholderOnInput = self.hidesPlaceholderOnInput; |
| copy.mdc_adjustsFontForContentSizeCategory = self.mdc_adjustsFontForContentSizeCategory; |
| copy.positioningDelegate = self.positioningDelegate; |
| copy.text = [self.text copy]; |
| copy.textColor = self.textColor; |
| copy.textInsetsMode = self.textInsetsMode; |
| copy.underline.lineHeight = self.underline.lineHeight; |
| copy.underline.color = self.underline.color; |
| |
| return copy; |
| } |
| |
| - (void)dealloc { |
| [self unsubscribeFromNotifications]; |
| [self unsubscribeFromKVO]; |
| } |
| |
| - (void)commonMDCTextInputCommonFundamentInit { |
| _textColor = MDCTextInputTextColor(); |
| _textInsetsMode = MDCTextInputTextInsetsModeIfContent; |
| _clearButtonMode = UITextFieldViewModeWhileEditing; |
| } |
| |
| - (void)setupClearButton { |
| if (!_clearButton) { |
| _clearButton = [[UIButton alloc] initWithFrame:CGRectZero]; |
| } |
| _clearButton.translatesAutoresizingMaskIntoConstraints = NO; |
| [_clearButton setContentCompressionResistancePriority:UILayoutPriorityDefaultLow - 1 |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| [_clearButton setContentCompressionResistancePriority:UILayoutPriorityDefaultLow - 1 |
| forAxis:UILayoutConstraintAxisVertical]; |
| [_clearButton setContentHuggingPriority:UILayoutPriorityDefaultLow + 1 |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| [_clearButton setContentHuggingPriority:UILayoutPriorityDefaultLow + 1 |
| forAxis:UILayoutConstraintAxisVertical]; |
| |
| _clearButton.opaque = NO; |
| |
| [_textInput addSubview:_clearButton]; |
| [_textInput sendSubviewToBack:_clearButton]; |
| |
| NSLayoutConstraint *height = [NSLayoutConstraint constraintWithItem:_clearButton |
| attribute:NSLayoutAttributeHeight |
| relatedBy:NSLayoutRelationEqual |
| toItem:_clearButton |
| attribute:NSLayoutAttributeWidth |
| multiplier:1 |
| constant:0]; |
| height.priority = UILayoutPriorityDefaultLow; |
| |
| self.clearButtonWidth = |
| [NSLayoutConstraint constraintWithItem:_clearButton |
| attribute:NSLayoutAttributeWidth |
| relatedBy:NSLayoutRelationEqual |
| toItem:nil |
| attribute:NSLayoutAttributeNotAnAttribute |
| multiplier:1 |
| constant:MDCTextInputClearButtonImageSquareWidthHeight]; |
| self.clearButtonWidth.priority = UILayoutPriorityDefaultLow; |
| |
| UIEdgeInsets insets = [self textInsets]; |
| CGFloat scale = UIScreen.mainScreen.scale; |
| CGFloat centerYConstant = |
| insets.top + (MDCCeil(self.textInput.font.lineHeight * scale) / scale) / 2; |
| self.clearButtonCenterY = [NSLayoutConstraint constraintWithItem:_clearButton |
| attribute:NSLayoutAttributeCenterY |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeTop |
| multiplier:1 |
| constant:centerYConstant]; |
| self.clearButtonCenterY.priority = UILayoutPriorityDefaultLow; |
| |
| self.placeholderTrailing = [NSLayoutConstraint constraintWithItem:_placeholderLabel |
| attribute:NSLayoutAttributeTrailing |
| relatedBy:NSLayoutRelationLessThanOrEqual |
| toItem:_clearButton |
| attribute:NSLayoutAttributeTrailing |
| multiplier:1 |
| constant:MDCTextInputHalfPadding]; |
| self.placeholderTrailing.priority = UILayoutPriorityDefaultLow; |
| |
| self.clearButtonTrailing = [NSLayoutConstraint |
| constraintWithItem:_clearButton |
| attribute:NSLayoutAttributeTrailing |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeTrailing |
| multiplier:1 |
| constant:-1 * (MDCTextInputClearButtonImageBuiltInPadding + insets.right)]; |
| self.clearButtonTrailing.priority = UILayoutPriorityDefaultLow; |
| |
| [NSLayoutConstraint activateConstraints:@[ |
| height, self.clearButtonWidth, self.clearButtonCenterY, self.placeholderLeading, |
| self.clearButtonTrailing |
| ]]; |
| |
| [_clearButton addTarget:self |
| action:@selector(clearButtonDidTouch) |
| forControlEvents:UIControlEventTouchUpInside]; |
| } |
| |
| - (void)setupPlaceholderLabel { |
| if (!_placeholderLabel) { |
| _placeholderLabel = [[UILabel alloc] initWithFrame:CGRectZero]; |
| } |
| _placeholderLabel.translatesAutoresizingMaskIntoConstraints = NO; |
| [_placeholderLabel setContentCompressionResistancePriority:UILayoutPriorityDefaultLow - 2 |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| [_placeholderLabel setContentHuggingPriority:UILayoutPriorityDefaultHigh |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| |
| _placeholderLabel.textAlignment = NSTextAlignmentNatural; |
| |
| _placeholderLabel.userInteractionEnabled = NO; |
| _placeholderLabel.opaque = NO; |
| |
| _placeholderLabel.textColor = MDCTextInputDefaultPlaceholderTextColor(); |
| _placeholderLabel.font = _textInput.font; |
| |
| [_textInput addSubview:_placeholderLabel]; |
| [_textInput sendSubviewToBack:_placeholderLabel]; |
| |
| [NSLayoutConstraint activateConstraints:[self placeholderDefaultConstaints]]; |
| |
| _hidesPlaceholderOnInput = YES; |
| } |
| |
| - (void)setupUnderlineLabels { |
| if (!_leadingUnderlineLabel) { |
| _leadingUnderlineLabel = [[UILabel alloc] initWithFrame:CGRectZero]; |
| _leadingUnderlineLabel.textColor = MDCTextInputDefaultPlaceholderTextColor(); |
| _leadingUnderlineLabel.font = _textInput.font; |
| _leadingUnderlineLabel.textAlignment = NSTextAlignmentNatural; |
| |
| [_leadingUnderlineLabel setTranslatesAutoresizingMaskIntoConstraints:NO]; |
| } |
| |
| if (!_trailingUnderlineLabel) { |
| _trailingUnderlineLabel = [[UILabel alloc] initWithFrame:CGRectZero]; |
| _trailingUnderlineLabel.textColor = [UIColor grayColor]; |
| _trailingUnderlineLabel.font = _textInput.font; |
| [_trailingUnderlineLabel setTranslatesAutoresizingMaskIntoConstraints:NO]; |
| } |
| |
| _leadingUnderlineLabel.opaque = NO; |
| [_textInput addSubview:_leadingUnderlineLabel]; |
| |
| _trailingUnderlineLabel.opaque = NO; |
| [_textInput addSubview:_trailingUnderlineLabel]; |
| |
| _leadingUnderlineLeading = [NSLayoutConstraint constraintWithItem:_leadingUnderlineLabel |
| attribute:NSLayoutAttributeLeading |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeLeading |
| multiplier:1 |
| constant:0]; |
| _leadingUnderlineLeading.priority = UILayoutPriorityDefaultLow; |
| |
| _trailingUnderlineTrailing = [NSLayoutConstraint constraintWithItem:_trailingUnderlineLabel |
| attribute:NSLayoutAttributeTrailing |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeTrailing |
| multiplier:1 |
| constant:0]; |
| _trailingUnderlineTrailing.priority = UILayoutPriorityDefaultLow; |
| |
| NSLayoutConstraint *labelSpacing = |
| [NSLayoutConstraint constraintWithItem:_leadingUnderlineLabel |
| attribute:NSLayoutAttributeTrailing |
| relatedBy:NSLayoutRelationEqual |
| toItem:_trailingUnderlineLabel |
| attribute:NSLayoutAttributeLeading |
| multiplier:1 |
| constant:0]; |
| labelSpacing.priority = UILayoutPriorityDefaultLow; |
| |
| [NSLayoutConstraint |
| activateConstraints:@[ labelSpacing, _leadingUnderlineLeading, _trailingUnderlineTrailing ]]; |
| |
| NSLayoutConstraint *leadingBottom = [NSLayoutConstraint constraintWithItem:_leadingUnderlineLabel |
| attribute:NSLayoutAttributeBottom |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeBottom |
| multiplier:1 |
| constant:0]; |
| leadingBottom.priority = UILayoutPriorityDefaultLow; |
| |
| NSLayoutConstraint *trailingBottom = |
| [NSLayoutConstraint constraintWithItem:_trailingUnderlineLabel |
| attribute:NSLayoutAttributeBottom |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeBottom |
| multiplier:1 |
| constant:0]; |
| trailingBottom.priority = UILayoutPriorityDefaultLow; |
| |
| [NSLayoutConstraint activateConstraints:@[ leadingBottom, trailingBottom ]]; |
| |
| // When push comes to shove, the leading label is more likely to expand than the trailing. |
| [_leadingUnderlineLabel setContentHuggingPriority:UILayoutPriorityDefaultLow - 1 |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| |
| [_trailingUnderlineLabel |
| setContentCompressionResistancePriority:UILayoutPriorityRequired |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| [_trailingUnderlineLabel setContentHuggingPriority:UILayoutPriorityRequired |
| forAxis:UILayoutConstraintAxisHorizontal]; |
| } |
| |
| - (void)setupUnderlineView { |
| if (!_underline) { |
| _underline = [[MDCTextInputUnderlineView alloc] initWithFrame:CGRectZero]; |
| } |
| _underline.color = MDCTextInputUnderlineColor(); |
| _underline.translatesAutoresizingMaskIntoConstraints = NO; |
| |
| [self.textInput addSubview:_underline]; |
| [self.textInput sendSubviewToBack:_underline]; |
| } |
| |
| #pragma mark - Border implementation |
| |
| - (void)setupBorder { |
| if (!_borderView) { |
| _borderView = [[MDCTextInputBorderView alloc] initWithFrame:CGRectZero]; |
| ; |
| [self.textInput addSubview:_borderView]; |
| [self.textInput sendSubviewToBack:_borderView]; |
| _borderView.translatesAutoresizingMaskIntoConstraints = NO; |
| |
| NSArray<NSLayoutConstraint *> *constraints = |
| [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[border]|" |
| options:0 |
| metrics:nil |
| views:@{ |
| @"border" : _borderView |
| }]; |
| constraints = [constraints |
| arrayByAddingObjectsFromArray:[NSLayoutConstraint |
| constraintsWithVisualFormat:@"H:|[border]|" |
| options:0 |
| metrics:nil |
| views:@{ |
| @"border" : _borderView |
| }]]; |
| for (NSLayoutConstraint *constraint in constraints) { |
| constraint.priority = UILayoutPriorityDefaultLow; |
| } |
| [NSLayoutConstraint activateConstraints:constraints]; |
| } |
| } |
| |
| - (void)unsubscribeFromNotifications { |
| NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter]; |
| [defaultCenter removeObserver:self]; |
| } |
| |
| #pragma mark - KVO Subscription |
| |
| - (void)subscribeForKVO { |
| if (!_underline) { |
| return; |
| } |
| [self.underline addObserver:self |
| forKeyPath:MDCTextInputUnderlineKVOKeyColor |
| options:0 |
| context:nil]; |
| [self.underline addObserver:self |
| forKeyPath:MDCTextInputUnderlineKVOKeyLineHeight |
| options:0 |
| context:nil]; |
| _isRegisteredForKVO = YES; |
| } |
| |
| - (void)unsubscribeFromKVO { |
| if (!_underline || !self.isRegisteredForKVO) { |
| return; |
| } |
| @try { |
| [_underline removeObserver:self forKeyPath:MDCTextInputUnderlineKVOKeyColor]; |
| [_underline removeObserver:self forKeyPath:MDCTextInputUnderlineKVOKeyLineHeight]; |
| } @catch (__unused NSException *exception) { |
| NSLog(@"Tried to unsubscribe from KVO in MDCTextInputCommonFundament but could not."); |
| } |
| _isRegisteredForKVO = NO; |
| } |
| |
| #pragma mark - Mirrored Layout Methods |
| |
| - (void)layoutSubviewsOfInput { |
| [self updatePlaceholderAlpha]; |
| [self.textInput sendSubviewToBack:_borderView]; |
| |
| if ([self needsUpdateConstraintsForPlaceholderToTextInsets] || |
| [self needsUpdateConstraintsForPlaceholderToOverlayViewsPosition]) { |
| [self.textInput setNeedsUpdateConstraints]; |
| } |
| |
| [self updateTextColor]; |
| [self updateClearButton]; |
| } |
| |
| - (void)updateConstraintsOfInput { |
| [self updateClearButtonConstraints]; |
| [self updatePlaceholderPosition]; |
| [self updateUnderlineLabels]; |
| } |
| |
| #pragma mark - Clear Button Implementation |
| |
| - (void)updateClearButton { |
| UIImage *image = self.clearButton.currentImage |
| ? self.clearButton.currentImage |
| : [self drawnClearButtonImage]; |
| |
| if (![self.clearButton imageForState:UIControlStateNormal]) { |
| [self.clearButton setImage:image forState:UIControlStateNormal]; |
| [self.clearButton setImage:image forState:UIControlStateHighlighted]; |
| [self.clearButton setImage:image forState:UIControlStateSelected]; |
| } |
| |
| CGFloat clearButtonAlpha = [self clearButtonAlpha]; |
| self.clearButton.alpha = clearButtonAlpha; |
| |
| if (self.clearButtonWidth.constant != |
| MDCTextInputClearButtonImageSquareWidthHeight * clearButtonAlpha) { |
| [self.textInput setNeedsUpdateConstraints]; |
| } |
| |
| [self.clearButton.superview bringSubviewToFront:self.clearButton]; |
| } |
| |
| - (void)updateClearButtonConstraints { |
| BOOL shouldInvalidateSize = NO; |
| CGFloat widthConstant = MDCTextInputClearButtonImageSquareWidthHeight * [self clearButtonAlpha]; |
| if (self.clearButtonWidth.constant != widthConstant) { |
| self.clearButtonWidth.constant = widthConstant; |
| shouldInvalidateSize = YES; |
| } |
| |
| UIEdgeInsets insets = [self textInsets]; |
| |
| CGFloat trailingConstant = MDCTextInputClearButtonImageBuiltInPadding - insets.right; |
| if (self.clearButtonTrailing.constant != trailingConstant) { |
| self.clearButtonTrailing.constant = trailingConstant; |
| shouldInvalidateSize = YES; |
| } |
| |
| CGFloat scale = UIScreen.mainScreen.scale; |
| CGFloat centerYConstant = |
| insets.top + (MDCCeil(self.textInput.font.lineHeight * scale) / scale) / 2; |
| if (self.clearButtonCenterY.constant != centerYConstant) { |
| self.clearButtonCenterY.constant = centerYConstant; |
| shouldInvalidateSize = YES; |
| } |
| |
| if (shouldInvalidateSize) { |
| [self.textInput invalidateIntrinsicContentSize]; |
| } |
| } |
| |
| - (CGFloat)clearButtonAlpha { |
| CGFloat clearButtonAlpha = 0; |
| if (self.text.length > 0) { |
| switch (self.clearButtonMode) { |
| case UITextFieldViewModeAlways: |
| clearButtonAlpha = 1; |
| break; |
| case UITextFieldViewModeWhileEditing: |
| if (self.isEditing) { |
| clearButtonAlpha = 1; |
| } |
| break; |
| case UITextFieldViewModeUnlessEditing: |
| if (!self.isEditing) { |
| clearButtonAlpha = 1; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (self.trailingView.superview && !MDCCGFloatEqual(self.trailingView.alpha, 0)) { |
| clearButtonAlpha = 0; |
| } |
| |
| return clearButtonAlpha; |
| } |
| |
| - (UIImage *)drawnClearButtonImage { |
| CGSize clearButtonSize = CGSizeMake(MDCTextInputClearButtonImageSquareWidthHeight, |
| MDCTextInputClearButtonImageSquareWidthHeight); |
| |
| CGRect bounds = CGRectMake(0, 0, clearButtonSize.width, clearButtonSize.height); |
| UIGraphicsBeginImageContextWithOptions(bounds.size, false, 0); |
| [UIColor.grayColor setFill]; |
| |
| [MDCPathForClearButtonImageFrame(bounds) fill]; |
| UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); |
| UIGraphicsEndImageContext(); |
| |
| image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]; |
| return image; |
| } |
| |
| - (void)clearButtonDidTouch { |
| if ([self.textInput isKindOfClass:[MDCTextField class]]) { |
| MDCTextField *textField = (MDCTextField *)self.textInput; |
| if ([textField.delegate respondsToSelector:@selector(textFieldShouldClear:)] && |
| ![textField.delegate textFieldShouldClear:textField]) { |
| return; |
| } |
| } |
| |
| if ([self.textInput isKindOfClass:[MDCMultilineTextField class]]) { |
| MDCMultilineTextField *textField = (MDCMultilineTextField *)self.textInput; |
| if ([textField.multilineDelegate |
| respondsToSelector:@selector(multilineTextFieldShouldClear:)] && |
| ![textField.multilineDelegate multilineTextFieldShouldClear:textField]) { |
| return; |
| } |
| } |
| |
| self.text = nil; |
| if (self.textInput.isFirstResponder) { |
| if ([self.textInput isKindOfClass:[MDCMultilineTextField class]]) { |
| MDCMultilineTextField *textField = (MDCMultilineTextField *)self.textInput; |
| [[NSNotificationCenter defaultCenter] postNotificationName:UITextViewTextDidChangeNotification |
| object:textField.textView]; |
| } else if ([self.textInput isKindOfClass:[UITextField class]]) { |
| UITextField *textField = (UITextField *)self.textInput; |
| [[NSNotificationCenter defaultCenter] |
| postNotificationName:UITextFieldTextDidChangeNotification |
| object:self.textInput]; |
| [textField sendActionsForControlEvents:UIControlEventEditingChanged]; |
| } |
| } |
| } |
| |
| #pragma mark - Properties Implementation |
| |
| - (void)setTextInsetsMode:(MDCTextInputTextInsetsMode)textInsetsMode { |
| if (_textInsetsMode != textInsetsMode) { |
| _textInsetsMode = textInsetsMode; |
| [self.textInput invalidateIntrinsicContentSize]; |
| } |
| } |
| |
| - (NSAttributedString *)attributedPlaceholder { |
| id placeholderString = self.placeholderLabel.text; |
| if ([placeholderString isKindOfClass:[NSString class]]) { |
| // TODO: (larche) Return string attributes also. Tho I feel like that should come from the |
| // placeholderLabel itself somehow. |
| NSAttributedString *constructedString = |
| [[NSAttributedString alloc] initWithString:(NSString *)placeholderString attributes:nil]; |
| return constructedString; |
| } else if ([placeholderString isKindOfClass:[NSAttributedString class]]) { |
| return (NSAttributedString *)placeholderString; |
| } |
| |
| return nil; |
| } |
| |
| - (void)setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholder { |
| self.placeholderLabel.text = attributedPlaceholder.string; |
| // TODO: (larche) Read string attributes also. Tho I feel like that should come from the |
| // placeholderLabel itself somehow. |
| |
| [self updatePlaceholderAlpha]; |
| [self.textInput setNeedsUpdateConstraints]; |
| } |
| |
| - (void)setBorderPath:(UIBezierPath *)borderPath { |
| if (_borderPath != borderPath) { |
| _borderPath = [UIBezierPath bezierPathWithCGPath:borderPath.CGPath]; |
| } |
| } |
| |
| - (void)setClearButtonMode:(UITextFieldViewMode)clearButtonMode { |
| _clearButtonMode = clearButtonMode; |
| [self updateClearButton]; |
| } |
| |
| - (UIColor *)cursorColor { |
| return self.textInput.cursorColor; |
| } |
| |
| - (void)setCursorColor:(UIColor *)cursorColor { |
| self.textInput.cursorColor = cursorColor; |
| } |
| |
| - (void)setEnabled:(BOOL)enabled { |
| _enabled = enabled; |
| self.underline.enabled = enabled; |
| } |
| |
| - (UIFont *)font { |
| return self.textInput.font; |
| } |
| |
| - (void)setFont:(UIFont *)font { |
| [self.textInput setFont:font]; |
| } |
| |
| - (void)setHidesPlaceholderOnInput:(BOOL)hidesPlaceholderOnInput { |
| _hidesPlaceholderOnInput = hidesPlaceholderOnInput; |
| [self updatePlaceholderAlpha]; |
| } |
| |
| - (BOOL)isEditing { |
| return self.textInput.isEditing; |
| } |
| |
| - (NSString *)placeholder { |
| id placeholderString = self.placeholderLabel.text; |
| if ([placeholderString isKindOfClass:[NSString class]]) { |
| return (NSString *)placeholderString; |
| } else if ([placeholderString isKindOfClass:[NSAttributedString class]]) { |
| return [(NSAttributedString *)placeholderString string]; |
| } |
| |
| return nil; |
| } |
| |
| - (void)setPlaceholder:(NSString *)placeholder { |
| self.placeholderLabel.text = placeholder; |
| [self updatePlaceholderAlpha]; |
| [self.textInput setNeedsLayout]; |
| } |
| |
| - (NSString *)text { |
| return self.textInput.text; |
| } |
| |
| - (void)setText:(NSString *)text { |
| [self.textInput setText:text]; |
| } |
| |
| - (void)setTextColor:(UIColor *)textColor { |
| if (!textColor) { |
| textColor = MDCTextInputTextColor(); |
| } |
| |
| if (_textColor != textColor) { |
| _textColor = textColor; |
| [self updateTextColor]; |
| } |
| } |
| |
| - (void)setTextInput:(UIView<MDCTextInput> *)textInput { |
| _textInput = textInput; |
| |
| [_textInput setNeedsLayout]; |
| } |
| |
| - (UIEdgeInsets)textInsets { |
| UIEdgeInsets textInsets = UIEdgeInsetsZero; |
| |
| textInsets.top = MDCTextInputFullPadding; |
| |
| CGFloat scale = UIScreen.mainScreen.scale; |
| CGFloat leadingOffset = MDCCeil(self.leadingUnderlineLabel.font.lineHeight * scale) / scale; |
| CGFloat trailingOffset = MDCCeil(self.trailingUnderlineLabel.font.lineHeight * scale) / scale; |
| |
| // The amount of space underneath the underline is variable. It could just be |
| // MDCTextInputHalfPadding or the biggest estimated underlineLabel height + |
| // MDCTextInputHalfPadding. It's also dependent on the .textInsetsMode. |
| |
| // contentConditionalOffset will have the estimated text height for the largest underline label |
| // that also has text. |
| CGFloat contentConditionalOffset = 0; |
| if (self.leadingUnderlineLabel.text.length) { |
| contentConditionalOffset = leadingOffset; |
| } |
| if (self.trailingUnderlineLabel.text.length) { |
| contentConditionalOffset = MAX(contentConditionalOffset, trailingOffset); |
| } |
| |
| CGFloat underlineOffset = MDCTextInputHalfPadding; |
| switch (self.textInsetsMode) { |
| case MDCTextInputTextInsetsModeAlways: |
| underlineOffset += MAX(leadingOffset, trailingOffset); |
| break; |
| case MDCTextInputTextInsetsModeIfContent: |
| underlineOffset += contentConditionalOffset; |
| break; |
| case MDCTextInputTextInsetsModeNever: |
| break; |
| } |
| |
| // .bottom = underlineOffset + the half padding ABOVE the line but below the text field |
| textInsets.bottom = underlineOffset + MDCTextInputHalfPadding; |
| |
| if ([self.positioningDelegate respondsToSelector:@selector(textInsets:)]) { |
| return [self.positioningDelegate textInsets:textInsets]; |
| } |
| return textInsets; |
| } |
| |
| - (UIView *)trailingView { |
| return self.textInput.trailingView; |
| } |
| |
| - (void)setTrailingView:(UIView *)trailingView { |
| self.textInput.trailingView = trailingView; |
| } |
| |
| - (UITextFieldViewMode)trailingViewMode { |
| return self.textInput.trailingViewMode; |
| } |
| |
| - (void)setTrailingViewMode:(UITextFieldViewMode)trailingViewMode { |
| self.textInput.trailingViewMode = trailingViewMode; |
| } |
| |
| #pragma mark - Layout |
| |
| - (void)updateTextColor { |
| self.textInput.textColor = self.textColor; |
| } |
| |
| - (void)updateFontsForDynamicType { |
| if (self.mdc_adjustsFontForContentSizeCategory) { |
| UIFont *textFont = [UIFont mdc_preferredFontForMaterialTextStyle:MDCFontTextStyleBody1]; |
| // TODO: (#4331) This needs to be converted to the new text scheme. |
| self.textInput.font = textFont; |
| self.leadingUnderlineLabel.font = textFont; |
| self.trailingUnderlineLabel.font = textFont; |
| self.placeholderLabel.font = textFont; |
| } |
| } |
| |
| - (BOOL)needsUpdateConstraintsForPlaceholderToTextInsets { |
| return (self.placeholderTop.constant != _textInput.textInsets.top || |
| self.placeholderLeading.constant != _textInput.textInsets.left || |
| self.placeholderTrailing.constant != -1 * _textInput.textInsets.right); |
| } |
| |
| - (BOOL)needsUpdateConstraintsForPlaceholderToOverlayViewsPosition { |
| if (![self.textInput isKindOfClass:[MDCTextField class]]) { |
| return NO; |
| } |
| |
| MDCTextField *textField = (MDCTextField *)self.textInput; |
| |
| return (textField.leadingView.superview && !self.placeholderLeadingLeadingViewTrailing) || |
| (!textField.leadingView.superview && self.placeholderLeadingLeadingViewTrailing) || |
| (textField.trailingView.superview && !self.placeholderTrailingTrailingViewLeading) || |
| (!textField.trailingView.superview && self.placeholderTrailingTrailingViewLeading); |
| } |
| |
| - (void)updatePlaceholderToOverlayViewsPosition { |
| if (![self.textInput isKindOfClass:[MDCTextField class]]) { |
| return; |
| } |
| |
| MDCTextField *textField = (MDCTextField *)self.textInput; |
| if (textField.leadingView.superview) { |
| CGFloat leadingViewTrailingConstant = MDCTextInputOverlayViewToEditingRectPadding; |
| if ([self.textInput.positioningDelegate |
| respondsToSelector:@selector(leadingViewTrailingPaddingConstant)]) { |
| leadingViewTrailingConstant = |
| [self.textInput.positioningDelegate leadingViewTrailingPaddingConstant]; |
| } |
| |
| if (!self.placeholderLeadingLeadingViewTrailing) { |
| self.placeholderLeadingLeadingViewTrailing = |
| [NSLayoutConstraint constraintWithItem:textField.placeholderLabel |
| attribute:NSLayoutAttributeLeading |
| relatedBy:NSLayoutRelationEqual |
| toItem:textField.leadingView |
| attribute:NSLayoutAttributeTrailing |
| multiplier:1 |
| constant:leadingViewTrailingConstant]; |
| self.placeholderLeadingLeadingViewTrailing.priority = UILayoutPriorityDefaultLow + 1; |
| self.placeholderLeadingLeadingViewTrailing.active = YES; |
| } |
| self.placeholderLeadingLeadingViewTrailing.constant = leadingViewTrailingConstant; |
| } else if (!textField.leadingView.superview && self.placeholderLeadingLeadingViewTrailing) { |
| self.placeholderLeadingLeadingViewTrailing = nil; |
| } |
| |
| if (textField.trailingView.superview && !self.placeholderTrailingTrailingViewLeading) { |
| self.placeholderTrailingTrailingViewLeading = |
| [NSLayoutConstraint constraintWithItem:textField.placeholderLabel |
| attribute:NSLayoutAttributeTrailing |
| relatedBy:NSLayoutRelationLessThanOrEqual |
| toItem:textField.trailingView |
| attribute:NSLayoutAttributeLeading |
| multiplier:1 |
| constant:MDCTextInputOverlayViewToEditingRectPadding]; |
| self.placeholderTrailingTrailingViewLeading.priority = UILayoutPriorityDefaultLow + 1; |
| self.placeholderTrailingTrailingViewLeading.active = YES; |
| } else if (!textField.trailingView.superview && self.placeholderTrailingTrailingViewLeading) { |
| self.placeholderTrailingTrailingViewLeading = nil; |
| } |
| |
| [textField invalidateIntrinsicContentSize]; |
| } |
| |
| - (void)updatePlaceholderAlpha { |
| CGFloat opacity = (self.hidesPlaceholderOnInput && self.textInput.text.length > 0) ? 0 : 1; |
| self.placeholderLabel.alpha = opacity; |
| } |
| |
| - (void)updatePlaceholderPosition { |
| self.placeholderTop.constant = _textInput.textInsets.top; |
| self.placeholderLeading.constant = _textInput.textInsets.left; |
| self.placeholderTrailing.constant = -1 * _textInput.textInsets.right; |
| |
| [self updatePlaceholderToOverlayViewsPosition]; |
| [self.textInput invalidateIntrinsicContentSize]; |
| } |
| |
| - (NSArray<NSLayoutConstraint *> *)placeholderDefaultConstaints { |
| UIEdgeInsets insets = ((MDCTextField *)_textInput).textInsets; |
| |
| self.placeholderTop = [NSLayoutConstraint constraintWithItem:_placeholderLabel |
| attribute:NSLayoutAttributeTop |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeTop |
| multiplier:1 |
| constant:insets.top]; |
| [self.placeholderTop setPriority:UILayoutPriorityDefaultLow]; |
| |
| // This can be affected by .leadingView and .trailingView. |
| // See updatePlaceholderToOverlayViewsPosition() |
| self.placeholderLeading = [NSLayoutConstraint constraintWithItem:_placeholderLabel |
| attribute:NSLayoutAttributeLeading |
| relatedBy:NSLayoutRelationEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeLeading |
| multiplier:1 |
| constant:insets.left]; |
| [self.placeholderLeading setPriority:UILayoutPriorityDefaultLow]; |
| |
| NSLayoutConstraint *placeholderTrailing = |
| [NSLayoutConstraint constraintWithItem:_placeholderLabel |
| attribute:NSLayoutAttributeTrailing |
| relatedBy:NSLayoutRelationLessThanOrEqual |
| toItem:_textInput |
| attribute:NSLayoutAttributeTrailing |
| multiplier:1 |
| constant:-1 * insets.right]; |
| placeholderTrailing.priority = UILayoutPriorityDefaultLow; |
| |
| return @[ self.placeholderTop, self.placeholderLeading, placeholderTrailing ]; |
| } |
| |
| - (void)updateUnderlineLabels { |
| UIEdgeInsets textInsets = self.textInsets; |
| |
| self.leadingUnderlineLeading.constant = textInsets.left; |
| self.trailingUnderlineTrailing.constant = -1 * textInsets.right; |
| } |
| |
| #pragma mark - Text Input Events |
| |
| - (void)didBeginEditing { |
| [self updateClearButton]; |
| [self.textInput invalidateIntrinsicContentSize]; |
| } |
| |
| - (void)didChange { |
| [self updateClearButton]; |
| [self updatePlaceholderAlpha]; |
| [self updatePlaceholderPosition]; |
| } |
| |
| - (void)didEndEditing { |
| [self updateClearButton]; |
| } |
| |
| - (void)didSetFont { |
| UIFont *font = self.textInput.font; |
| self.placeholderLabel.font = font; |
| |
| [self updatePlaceholderPosition]; |
| } |
| |
| - (void)didSetText { |
| [self didChange]; |
| [self.textInput setNeedsLayout]; |
| } |
| |
| #pragma mark - KVO |
| |
| - (void)observeValueForKeyPath:(NSString *)keyPath |
| ofObject:(id)object |
| change:(__unused NSDictionary<NSKeyValueChangeKey, id> *)change |
| context:(__unused void *)context { |
| // Listening to outside setting of underline properties. |
| if (object != self.underline) { |
| return; |
| } |
| |
| if ([keyPath isEqualToString:MDCTextInputUnderlineKVOKeyColor]) { |
| if (!self.underline.color) { |
| self.underline.color = MDCTextInputUnderlineColor(); |
| } |
| } else if ([keyPath isEqualToString:MDCTextInputUnderlineKVOKeyLineHeight]) { |
| [self.textInput setNeedsUpdateConstraints]; |
| } else { |
| return; |
| } |
| } |
| |
| #pragma mark - Accessibility |
| |
| - (BOOL)mdc_adjustsFontForContentSizeCategory { |
| return _mdc_adjustsFontForContentSizeCategory; |
| } |
| |
| - (void)mdc_setAdjustsFontForContentSizeCategory:(BOOL)adjusts { |
| _mdc_adjustsFontForContentSizeCategory = adjusts; |
| |
| if (adjusts) { |
| [self updateFontsForDynamicType]; |
| } |
| |
| if (_mdc_adjustsFontForContentSizeCategory) { |
| [[NSNotificationCenter defaultCenter] addObserver:self |
| selector:@selector(contentSizeCategoryDidChange:) |
| name:UIContentSizeCategoryDidChangeNotification |
| object:nil]; |
| } else { |
| [[NSNotificationCenter defaultCenter] removeObserver:self |
| name:UIContentSizeCategoryDidChangeNotification |
| object:nil]; |
| } |
| } |
| |
| - (void)contentSizeCategoryDidChange:(__unused NSNotification *)notification { |
| [self updateFontsForDynamicType]; |
| } |
| |
| @end |
