components/TextFields/src/MDCTextField.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 <UIKit/UIKit.h>

#import "MDCTextInput.h"

/** When text is manually set via .text or setText:, this notification fires. */
extern NSString *_Nonnull const MDCTextFieldTextDidSetTextNotification;

/** When the value of `enabled` changes on the text input, this notification fires. */
extern NSString *_Nonnull const MDCTextInputDidToggleEnabledNotification;

/**
  Material Design compliant single-line text input.
  https://www.google.com/design/spec/components/text-fields.html#text-fields-single-line-text-field
 */
@interface MDCTextField : UITextField <MDCTextInput, MDCLeadingViewTextInput>

/** MDCTextField does not implement borders that conform to UITextBorderStyle. */
@property(nonatomic, assign) UITextBorderStyle borderStyle NS_UNAVAILABLE;

/**
 This label should always have the same layout as the input field (which is private API.)

 Unfortunately the included private baseline strut (which is the label returned for baseline-based
 auto layout) has bugs that keep it from matching custom layout. We recreate it but also allow it to
 have a width in case someone needs other kinds of auto layout constraints based off the input.

 It always has an alpha of 0.0.
 */
@property(nonatomic, nonnull, strong, readonly) UILabel *inputLayoutStrut;

/**
 An overlay view on the leading side.

 Note: if RTL is engaged, this will return the .rightView and if LTR, it will return the .leftView.
 */
@property(nonatomic, nullable, strong) UIView *leadingView;

/**
 Controls when the leading view will display.
 */
@property(nonatomic, assign) UITextFieldViewMode leadingViewMode;

@end