components/schemes/Typography/src/MDCTypographyScheme.m

// Copyright 2018-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 "MDCTypographyScheme.h"

#import "MDCFontScaler.h"
#import "UIFont+MaterialScalable.h"

@implementation MDCTypographyScheme

- (instancetype)init {
  return [self initWithDefaults:MDCTypographySchemeDefaultsMaterial201902];
}

- (instancetype)initWithDefaults:(MDCTypographySchemeDefaults)defaults {
  self = [super init];
  if (self) {
    _useCurrentContentSizeCategoryWhenApplied = NO;

    switch (defaults) {
      case MDCTypographySchemeDefaultsMaterial201804:
        _headline1 = [UIFont systemFontOfSize:96.0 weight:UIFontWeightLight];
        _headline2 = [UIFont systemFontOfSize:60.0 weight:UIFontWeightLight];
        _headline3 = [UIFont systemFontOfSize:48.0 weight:UIFontWeightRegular];
        _headline4 = [UIFont systemFontOfSize:34.0 weight:UIFontWeightRegular];
        _headline5 = [UIFont systemFontOfSize:24.0 weight:UIFontWeightRegular];
        _headline6 = [UIFont systemFontOfSize:20.0 weight:UIFontWeightMedium];
        _subtitle1 = [UIFont systemFontOfSize:16.0 weight:UIFontWeightRegular];
        _subtitle2 = [UIFont systemFontOfSize:14.0 weight:UIFontWeightRegular];
        _body1 = [UIFont systemFontOfSize:16.0 weight:UIFontWeightRegular];
        _body2 = [UIFont systemFontOfSize:14.0 weight:UIFontWeightRegular];
        _caption = [UIFont systemFontOfSize:12.0 weight:UIFontWeightRegular];
        _button = [UIFont systemFontOfSize:14.0 weight:UIFontWeightMedium];
        _overline = [UIFont systemFontOfSize:12.0 weight:UIFontWeightMedium];
        break;
      case MDCTypographySchemeDefaultsMaterial201902:
        _headline1 = [UIFont systemFontOfSize:96.0 weight:UIFontWeightLight];
        _headline2 = [UIFont systemFontOfSize:60.0 weight:UIFontWeightLight];
        _headline3 = [UIFont systemFontOfSize:48.0 weight:UIFontWeightRegular];
        _headline4 = [UIFont systemFontOfSize:34.0 weight:UIFontWeightRegular];
        _headline5 = [UIFont systemFontOfSize:24.0 weight:UIFontWeightRegular];
        _headline6 = [UIFont systemFontOfSize:20.0 weight:UIFontWeightMedium];
        _subtitle1 = [UIFont systemFontOfSize:16.0 weight:UIFontWeightRegular];
        _subtitle2 = [UIFont systemFontOfSize:14.0 weight:UIFontWeightRegular];
        _body1 = [UIFont systemFontOfSize:16.0 weight:UIFontWeightRegular];
        _body2 = [UIFont systemFontOfSize:14.0 weight:UIFontWeightRegular];
        _caption = [UIFont systemFontOfSize:12.0 weight:UIFontWeightRegular];
        _button = [UIFont systemFontOfSize:14.0 weight:UIFontWeightMedium];
        _overline = [UIFont systemFontOfSize:12.0 weight:UIFontWeightMedium];

        // Attach a sizing curve to all fonts
        MDCFontScaler *fontScaler =
            [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleHeadline1];
        _headline1 = [fontScaler scaledFontWithFont:_headline1];
        _headline1 = [_headline1 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleHeadline2];
        _headline2 = [fontScaler scaledFontWithFont:_headline2];
        _headline2 = [_headline2 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleHeadline3];
        _headline3 = [fontScaler scaledFontWithFont:_headline3];
        _headline3 = [_headline3 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleHeadline4];
        _headline4 = [fontScaler scaledFontWithFont:_headline4];
        _headline4 = [_headline4 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleHeadline5];
        _headline5 = [fontScaler scaledFontWithFont:_headline5];
        _headline5 = [_headline5 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleHeadline6];
        _headline6 = [fontScaler scaledFontWithFont:_headline6];
        _headline6 = [_headline6 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleSubtitle1];
        _subtitle1 = [fontScaler scaledFontWithFont:_subtitle1];
        _subtitle1 = [_subtitle1 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleSubtitle2];
        _subtitle2 = [fontScaler scaledFontWithFont:_subtitle2];
        _subtitle2 = [_subtitle2 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleBody1];
        _body1 = [fontScaler scaledFontWithFont:_body1];
        _body1 = [_body1 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleBody2];
        _body2 = [fontScaler scaledFontWithFont:_body2];
        _body2 = [_body2 mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleCaption];
        _caption = [fontScaler scaledFontWithFont:_caption];
        _caption = [_caption mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleButton];
        _button = [fontScaler scaledFontWithFont:_button];
        _button = [_button mdc_scaledFontAtDefaultSize];

        fontScaler = [[MDCFontScaler alloc] initForMaterialTextStyle:MDCTextStyleOverline];
        _overline = [fontScaler scaledFontWithFont:_overline];
        _overline = [_overline mdc_scaledFontAtDefaultSize];

        break;
    }
  }
  return self;
}

#pragma mark - NSCopying

- (id)copyWithZone:(NSZone *)zone {
  MDCTypographyScheme *copy = [[MDCTypographyScheme alloc] init];
  copy.headline1 = self.headline1;
  copy.headline2 = self.headline2;
  copy.headline3 = self.headline3;
  copy.headline4 = self.headline4;
  copy.headline5 = self.headline5;
  copy.headline6 = self.headline6;
  copy.subtitle1 = self.subtitle1;
  copy.subtitle2 = self.subtitle2;
  copy.body1 = self.body1;
  copy.body2 = self.body2;
  copy.caption = self.caption;
  copy.button = self.button;
  copy.overline = self.overline;
  copy.useCurrentContentSizeCategoryWhenApplied = self.useCurrentContentSizeCategoryWhenApplied;

  return copy;
}

@end