space-ios/iOSClient/Utility/TOPasscodeViewController/Views/Settings/TOPasscodeSettingsWarningLabel.m

//
//  TOPasscodeSettingsWarningLabel.m
//
//  Copyright 2017 Timothy Oliver. All rights reserved.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to
//  deal in the Software without restriction, including without limitation the
//  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
//  sell copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
//  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
//  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
//  IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#import "TOPasscodeSettingsWarningLabel.h"

@interface TOPasscodeSettingsWarningLabel ()
@property (nonatomic, strong) UILabel *label;
@end

@implementation TOPasscodeSettingsWarningLabel

@synthesize backgroundColor = __backgroundColor;

#pragma mark - View Setup -

- (instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        [self setUp];
    }

    return self;
}

- (void)setUp
{
    _numberOfWarnings = 0;
    _textPadding = CGSizeMake(14.0f, 6.0f);

    self.tintColor = [UIColor colorWithRed:214.0f/255.0f green:63.0f/255.0f blue:63.0f/255.0f alpha:1.0f];

    self.label = [[UILabel alloc] initWithFrame:CGRectZero];
    self.label.backgroundColor = [UIColor clearColor];
    self.label.textAlignment = NSTextAlignmentCenter;
    self.label.textColor = [UIColor whiteColor];
    self.label.font = [UIFont systemFontOfSize:15.0f];
    [self setTextForCount:0];
    [self.label sizeToFit];
    [self addSubview:self.label];
}

- (void)didMoveToSuperview
{
    [super didMoveToSuperview];
    [self setBackgroundImageIfNeeded];
}

#pragma mark - View Layout -

- (void)sizeToFit
{
    [super sizeToFit];
    [self.label sizeToFit];

    CGRect labelFrame = self.label.frame;
    CGRect frame = self.frame;

    labelFrame = CGRectInset(labelFrame, -self.textPadding.width, -self.textPadding.height);
    frame.size = labelFrame.size;
    self.frame = CGRectIntegral(frame);
}

- (void)layoutSubviews
{
    CGRect frame = self.frame;
    CGRect labelFrame = self.label.frame;

    labelFrame.origin.x = (CGRectGetWidth(frame) - CGRectGetWidth(labelFrame)) * 0.5f;
    labelFrame.origin.y = (CGRectGetHeight(frame) - CGRectGetHeight(labelFrame)) * 0.5f;
    self.label.frame = labelFrame;
}

#pragma mark - View State Handling -

- (void)setTextForCount:(NSInteger)count
{
    NSString *text = nil;
    if (count == 1) {
        text = NSLocalizedString(@"1 Failed Passcode Attempt", @"");
    }
    else {
        text = [NSString stringWithFormat:NSLocalizedString(@"%d Failed Passcode Attempts", @""), count];
    }
    self.label.text = text;

    [self sizeToFit];
}

#pragma mark - Background Image Managements -

- (void)setBackgroundImageIfNeeded
{
    // Don't bother if we're not in a view
    if (self.superview == nil) { return; }

    // Compare the view height and don't proceed if
    if (lround(self.image.size.height) == lround(self.frame.size.height)) { return; }

    // Create the image
    self.image = [[self class] roundedBackgroundImageWithHeight:self.frame.size.height];
}

+ (UIImage *)roundedBackgroundImageWithHeight:(CGFloat)height
{
    UIImage *image = nil;
    CGRect frame = CGRectZero;
    frame.size.width = height + 1.0;
    frame.size.height = height;

    UIGraphicsBeginImageContextWithOptions(frame.size, NO, 0.0f);
    {
        UIBezierPath* path = [UIBezierPath bezierPathWithRoundedRect:frame cornerRadius:height * 0.5f];
        [[UIColor blackColor] setFill];
        [path fill];

        image = UIGraphicsGetImageFromCurrentImageContext();
    }
    UIGraphicsEndImageContext();

    CGFloat halfHeight = height * 0.5f;
    UIEdgeInsets insets = UIEdgeInsetsMake(halfHeight, halfHeight, halfHeight, halfHeight);
    image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
    image = [image resizableImageWithCapInsets:insets];
    return image;
}

#pragma mark - Accessors -

- (void)setNumberOfWarnings:(NSInteger)numberOfWarnings
{
    _numberOfWarnings = numberOfWarnings;
    [self setTextForCount:_numberOfWarnings];
}

@end