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[Link] Add and display instant debit mandate (#786)
* Add instant debit mandate * Use calculated line spacing * Cleanup * Add snapshot test * Fix build * Cleanup * Rename property * Fix animation glitch * Fix iOS 12 test
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| // | ||
| // LinkInstantDebitMandateView.swift | ||
| // StripeiOS | ||
| // | ||
| // Created by Ramon Torres on 2/17/22. | ||
| // Copyright © 2022 Stripe, Inc. All rights reserved. | ||
| // | ||
|
|
||
| import UIKit | ||
| @_spi(STP) import StripeUICore | ||
|
|
||
| protocol LinkInstantDebitMandateViewDelegate: AnyObject { | ||
| /// Called when the user taps on a link. | ||
| /// | ||
| /// - Parameters: | ||
| /// - mandateView: The view that the user interacted with. | ||
| /// - url: URL of the link. | ||
| func instantDebitMandateView(_ mandateView: LinkInstantDebitMandateView, didTapOnLinkWithURL url: URL) | ||
| } | ||
|
|
||
| // TODO(ramont): extract common code with `LinkLegalTermsView`. | ||
|
|
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| /// For internal SDK use only | ||
| @objc(STP_Internal_LinkInstantDebitMandateViewDelegate) | ||
| final class LinkInstantDebitMandateView: UIView { | ||
| struct Constants { | ||
| static let lineHeight: CGFloat = 1.5 | ||
| } | ||
|
|
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| // TODO(ramont): Update with final URLs | ||
| private let links: [String: URL] = [ | ||
| "terms": URL(string: "https://stripe.com/legal")! | ||
| ] | ||
|
|
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| weak var delegate: LinkInstantDebitMandateViewDelegate? | ||
|
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| var textColor: UIColor? { | ||
| get { | ||
| return textView.textColor | ||
| } | ||
| set { | ||
| textView.textColor = newValue | ||
| } | ||
| } | ||
|
|
||
| private lazy var textView: UITextView = { | ||
| let textView = UITextView() | ||
| textView.isScrollEnabled = false | ||
| textView.isEditable = false | ||
| textView.font = LinkUI.font(forTextStyle: .caption) | ||
| textView.backgroundColor = .clear | ||
| textView.attributedText = formattedLegalText() | ||
| textView.textColor = CompatibleColor.secondaryLabel | ||
| textView.textAlignment = .center | ||
| textView.textContainerInset = .zero | ||
| textView.textContainer.lineFragmentPadding = 0 | ||
| textView.delegate = self | ||
| textView.clipsToBounds = false | ||
| return textView | ||
| }() | ||
|
|
||
| init(delegate: LinkInstantDebitMandateViewDelegate? = nil) { | ||
| super.init(frame: .zero) | ||
| self.delegate = delegate | ||
| addAndPinSubview(textView) | ||
| } | ||
|
|
||
| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
|
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| override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) { | ||
| super.traitCollectionDidChange(previousTraitCollection) | ||
| textView.font = LinkUI.font(forTextStyle: .caption, compatibleWith: traitCollection) | ||
| } | ||
|
|
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| private func formattedLegalText() -> NSAttributedString { | ||
| // TODO(ramont): Localize | ||
| let string = "By continuing, you agree to authorize payments pursuant to these <terms>terms</terms>." | ||
|
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| let formattedString = NSMutableAttributedString() | ||
|
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| STPStringUtils.parseRanges(from: string, withTags: Set<String>(links.keys)) { string, matches in | ||
| formattedString.append(NSAttributedString(string: string)) | ||
|
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| for (tag, range) in matches { | ||
| guard range.rangeValue.location != NSNotFound else { | ||
| assertionFailure("Tag '<\(tag)>' not found") | ||
| continue | ||
| } | ||
|
|
||
| if let url = links[tag] { | ||
| formattedString.addAttributes([.link: url], range: range.rangeValue) | ||
| } | ||
| } | ||
| } | ||
|
|
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| let paragraphStyle = NSMutableParagraphStyle() | ||
| paragraphStyle.lineSpacing = LinkUI.lineSpacing( | ||
| fromRelativeHeight: Constants.lineHeight, | ||
| textStyle: .caption | ||
| ) | ||
|
|
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| formattedString.addAttributes([.paragraphStyle: paragraphStyle], range: formattedString.extent) | ||
|
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| return formattedString | ||
| } | ||
|
|
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| } | ||
|
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| extension LinkInstantDebitMandateView: UITextViewDelegate { | ||
|
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| func textView( | ||
| _ textView: UITextView, | ||
| shouldInteractWith URL: URL, | ||
| in characterRange: NSRange, | ||
| interaction: UITextItemInteraction | ||
| ) -> Bool { | ||
| if interaction == .invokeDefaultAction { | ||
| delegate?.instantDebitMandateView(self, didTapOnLinkWithURL: URL) | ||
| } | ||
|
|
||
| return false | ||
| } | ||
|
|
||
| } |
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