| // Copyright 2019-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 <Foundation/Foundation.h> |
| #import <UIKit/UIKit.h> |
| #import "MDCTextControlLabelSupport.h" |
| |
| /** |
| The logic to animate labels is extracted into its own class so that any MDCTextControl can |
| make use of it. |
| */ |
| @interface MDCTextControlLabelAnimation : NSObject |
| |
| /** |
| This method lays out the label in an animated fashion, often from normal position to the floating |
| position, and vice versa. |
| |
| This method does not attempt an animation and passes @c NO to the completion block if an animation |
| is already in progress. It does the animation and passes @c YES to the completion block if there is |
| no animation in progress. |
| */ |
| + (void)animateLabel:(nonnull UILabel *)label |
| state:(MDCTextControlLabelPosition)labelPosition |
| normalLabelFrame:(CGRect)normalLabelFrame |
| floatingLabelFrame:(CGRect)floatingLabelFrame |
| normalFont:(nonnull UIFont *)normalFont |
| floatingFont:(nonnull UIFont *)floatingFont |
| labelTruncationIsPresent:(BOOL)labelTruncationIsPresent |
| animationDuration:(NSTimeInterval)animationDuration |
| completion:(void (^__nullable)(BOOL))completion; |
| @end |
