components/AnimationTiming/src/CAMediaTimingFunction+MDCAnimationTiming.m

// 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 "CAMediaTimingFunction+MDCAnimationTiming.h"

@implementation CAMediaTimingFunction (MDCAnimationTiming)

+ (CAMediaTimingFunction *)mdc_functionWithType:(MDCAnimationTimingFunction)type {
  switch (type) {
    case MDCAnimationTimingFunctionStandard:
      return [[CAMediaTimingFunction alloc] initWithControlPoints:(float)0.4:0:(float)0.2:1];
    case MDCAnimationTimingFunctionDeceleration:
      return [[CAMediaTimingFunction alloc] initWithControlPoints:0:0:(float)0.2:1];
    case MDCAnimationTimingFunctionAcceleration:
      return [[CAMediaTimingFunction alloc] initWithControlPoints:(float)0.4:0:1:1];
    case MDCAnimationTimingFunctionSharp:
      return [[CAMediaTimingFunction alloc] initWithControlPoints:(float)0.4:0:(float)0.6:1];
  }
  NSAssert(NO, @"Invalid MDCAnimationTimingFunction value %i.", (int)type);
  // Reasonable default to use in Release mode for garbage input.
  return nil;
}

@end