FMCPlanner2/FMC Planner 2/ViewControllerScreen.m

//
//  ViewControllerScreen.m
//  FMC Planner 2
//
//  Created by Kilian Hofmann on 20.03.16.
//  Copyright © 2016 Kilian Hofmann. All rights reserved.
//

#import "ViewControllerScreen.h"

@implementation ViewControllerScreen

- (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view.
  // Init Start Page
  [self clearScreen];
  _Header.text = @"START";
  _Scratchpad.text = @"";

  // Tap gesture shit
  for (UILabel *label in _LSK) {
    label.adjustsFontSizeToFitWidth = YES;
    label.userInteractionEnabled = YES;
    UITapGestureRecognizer *reg =
        [[UITapGestureRecognizer alloc] initWithTarget:self
                                                action:@selector(enterLSK:)];
    [reg setNumberOfTapsRequired:1];
    [reg setNumberOfTouchesRequired:1];
    [label addGestureRecognizer:reg];
  }
}

- (void)viewDidAppear:(BOOL)animated {
  [self loadScreen:@"Menu"];
}

- (void)viewDidLayoutSubviews {
  // Size and LineBreak
  _Header.font = [self findAdaptiveFontForUILabelSize:_Header.frame.size
                                      withMinimumSize:5
                                              withMod:1];
  _Header.adjustsFontSizeToFitWidth = YES;
  _Scratchpad.font = [self findAdaptiveFontForUILabelSize:_Scratchpad.frame.size
                                          withMinimumSize:5
                                                  withMod:1];
  _Scratchpad.adjustsFontSizeToFitWidth = YES;
}

- (void)clearScreen {
  for (UILabel *label in _LSK) {
    label.text = @"";
  }
  _Scratchpad.text = @"";
  _Header.text = @"";
}

- (void)enterLSK:(UITapGestureRecognizer *)tapReg {
  UILabel *label = ((UILabel *)tapReg.view);
  BOOL append = false;
  NSMutableAttributedString *attSOld = [label.attributedText mutableCopy];
  NSRange rangeDesc = [[attSOld string]
      rangeOfString:[[[attSOld string] componentsSeparatedByString:@"\n"]
                        firstObject]];
  NSRange rangeEntry = [[attSOld string]
      rangeOfString:[[[attSOld string] componentsSeparatedByString:@"\n"]
                        lastObject]];
  append = rangeDesc.length + 1 == attSOld.length;

  if ([_Scratchpad.text isEqualToString:@"DELETE"]) {
    if (append) {
    } else {
      NSRange new = NSMakeRange(rangeDesc.length + 1, rangeEntry.length);
      [attSOld replaceCharactersInRange:new withString:@""];
      label.attributedText = attSOld;
    }
  } else {
    if (!append) {
      [attSOld replaceCharactersInRange:NSMakeRange(rangeDesc.length + 1,
                                                    rangeEntry.length)
                             withString:_Scratchpad.text];
      [attSOld
          addAttribute:NSFontAttributeName
                 value:[self findAdaptiveFontForUILabelSize:label.frame.size
                                            withMinimumSize:5
                                                    withMod:2]
                 range:NSMakeRange(rangeDesc.length + 1, rangeEntry.length)];
    } else {
      NSMutableAttributedString *attSNew =
          [[NSMutableAttributedString alloc] initWithString:_Scratchpad.text];
      [attSNew
          addAttribute:NSFontAttributeName
                 value:[self findAdaptiveFontForUILabelSize:label.frame.size
                                            withMinimumSize:5
                                                    withMod:2]
                 range:NSMakeRange(0, attSNew.length)];
      [attSOld appendAttributedString:attSNew];
    }
    label.attributedText = attSOld;
  }
  _Scratchpad.text = @"";
}

- (UIFont *)findAdaptiveFontForUILabelSize:(CGSize)labelSize
                           withMinimumSize:(NSInteger)minSize
                                   withMod:(float)mod {
  UIFont *tempFont = nil;
  NSString *testString =
      @"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

  NSInteger tempMin = minSize / mod;
  NSInteger tempMax = 256;
  NSInteger mid = 0;
  NSInteger difference = 0;

  while (tempMin <= tempMax) {
    mid = tempMin + (tempMax - tempMin) / 2;
    tempFont = [UIFont systemFontOfSize:mid];
    difference =
        labelSize.height / mod -
        [testString
            sizeWithAttributes:[NSDictionary
                                   dictionaryWithObject:tempFont
                                                 forKey:NSFontAttributeName]]
            .height;

    if (mid == tempMin || mid == tempMax) {
      if (difference < 0) {
        return [UIFont systemFontOfSize:(mid - 1)];
      }

      return [UIFont systemFontOfSize:mid];
    }

    if (difference < 0) {
      tempMax = mid - 1;
    } else if (difference > 0) {
      tempMin = mid + 1;
    } else {
      return [UIFont systemFontOfSize:mid];
    }
  }

  return [UIFont systemFontOfSize:mid];
}

- (void)loadScreen:(NSString *)screenName {
  _Header.text = screenName;
  NSArray *screen = [[NSArray alloc]
      initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:screenName
                                                             ofType:@"plist"]];
  for (int i = 0; i < _LSK.count; i++) {
    NSMutableAttributedString *attS = [[NSMutableAttributedString alloc]
        initWithString:[NSString stringWithFormat:@"%@\n", screen[i]]];
    NSRange range = [[attS string] rangeOfString:screen[i]];
    [attS addAttribute:NSFontAttributeName
                 value:[self findAdaptiveFontForUILabelSize:((UILabel *)_LSK[i])
                                                                .frame.size
                                            withMinimumSize:5
                                                    withMod:2.5]
                 range:range];
    ((UILabel *)_LSK[i]).attributedText = attS;
  }
}

@end