components/TextFields/src/private/MDCTextInputCommonFundament.h

// 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 "MDCButton.h"
#import "MDCTextInput.h"

extern const CGFloat MDCTextInputBorderRadius;
extern const CGFloat MDCTextInputFullPadding;
extern const CGFloat MDCTextInputHalfPadding;

UIKIT_EXTERN UIColor *_Nonnull MDCTextInputCursorColor(void);

@interface MDCTextInputClearButton : MDCButton
@property(nonatomic, assign) UIEdgeInsets minimumTouchTargetInsets;
@end

/** A controller for common traits shared by text inputs. */
@interface MDCTextInputCommonFundament : NSObject <MDCTextInput, NSCopying>

/**
 An overlay view on the side of the input where reading and writing lines begin. In LTR this is
 the Left side. In RTL, the Right side.
 */
@property(nonatomic, nullable, strong) UIView *leadingView;

@property(nonatomic) UITextFieldViewMode leadingViewMode;

/** The color of the input's text. */
@property(nonatomic, nullable, strong) UIColor *textColor;

/** The width provided by sizeThatFits: used as a hint to calculate the correct height of the
 * textfield. */
@property(nonatomic, assign) CGFloat sizeThatFitsWidthHint;

/** Designated initializer with the controlled text input. */
- (nonnull instancetype)initWithTextInput:(UIView<MDCTextInput> *_Nonnull)textInput
    NS_DESIGNATED_INITIALIZER;

/** Please use initWithTextInput:. */
- (nonnull instancetype)init NS_UNAVAILABLE;

/** Text began being edited event. */
- (void)didBeginEditing;

/** Text did change event. */
- (void)didChange;

/** Text stopped being edited event. */
- (void)didEndEditing;

/**
 Called by the controlled text input to notify the controller that it's font was set.

 @param previousFont The font previously set on the text input.
 */
- (void)didSetFont:(nullable UIFont *)previousFont;

/** Called by the controlled text input to notify the controller that it's text was set manually. */
- (void)didSetText;

/** Mirror of UIView's layoutSubviews(). */
- (void)layoutSubviewsOfInput;

/** Mirror of UIView's updateConstraints(). */
- (void)updateConstraintsOfInput;

/** Clear button did touch event. */
- (void)clearButtonDidTouch;

@end