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//
// InAppPurchaseButton.swift
// MullvadVPN
//
// Created by pronebird on 23/03/2020.
// Copyright © 2020 Mullvad VPN AB. All rights reserved.
//
import Foundation
import UIKit
class InAppPurchaseButton: AppButton {
let activityIndicator = SpinnerActivityIndicatorView(style: .medium)
var isLoading: Bool = false {
didSet {
if isLoading {
activityIndicator.startAnimating()
} else {
activityIndicator.stopAnimating()
}
setNeedsLayout()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
addSubview(activityIndicator)
// Make sure the buy button scales down the font size to fit the long labels.
// Changing baseline adjustment helps to prevent the text from being misaligned after
// being scaled down.
titleLabel?.adjustsFontSizeToFitWidth = true
titleLabel?.baselineAdjustment = .alignCenters
}
override func layoutSubviews() {
super.layoutSubviews()
activityIndicator.frame = activityIndicatorRect(
forContentRect: contentRect(forBounds: bounds)
)
}
override func titleRect(forContentRect contentRect: CGRect) -> CGRect {
var titleRect = super.titleRect(forContentRect: contentRect)
let activityIndicatorRect = self.activityIndicatorRect(forContentRect: contentRect)
// Adjust the title frame in case if it overlaps the activity indicator
let intersection = titleRect.intersection(activityIndicatorRect)
if !intersection.isNull {
if case .leftToRight = effectiveUserInterfaceLayoutDirection {
titleRect.origin.x = max(contentRect.minX, titleRect.minX - intersection.width)
titleRect.size.width = intersection.minX - titleRect.minX
} else {
titleRect.origin.x = titleRect.minX + intersection.width
titleRect.size.width = min(contentRect.maxX, titleRect.maxX) - intersection.maxX
}
}
return titleRect
}
private func activityIndicatorRect(forContentRect contentRect: CGRect) -> CGRect {
var frame = activityIndicator.frame
if case .leftToRight = effectiveUserInterfaceLayoutDirection {
frame.origin.x = contentRect.maxX - frame.width
} else {
frame.origin.x = contentRect.minX
}
frame.origin.y = contentRect.midY - frame.height * 0.5
return frame
}
}
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