34 lines
1.4 KiB
Swift
34 lines
1.4 KiB
Swift
//
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// Copyright 2022-2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only
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// Please see LICENSE in the repository root for full details.
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//
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import Foundation
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import UIKit
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/// The presentation context is used by `UserIndicatorViewPresentable`s to display content
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/// on the screen and it serves two primary purposes:
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///
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/// - abstraction on top of UIKit (passing context instead of view controllers)
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/// - immutable context passed at init with variable presenting view controller
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/// (e.g. depending on collapsed / uncollapsed iPad presentation that changes
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/// at runtime)
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public protocol UserIndicatorPresentationContext {
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var indicatorPresentingViewController: UIViewController? { get }
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}
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/// A simple implementation of `UserIndicatorPresentationContext` that uses a weak reference
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/// to the passed-in view controller as the presentation context.
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public class StaticUserIndicatorPresentationContext: UserIndicatorPresentationContext {
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// The presenting view controller will be the parent of the user indicator,
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// and the indicator holds a strong reference to the context, so the view controller
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// must be decleared `weak` to avoid a retain cycle
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public private(set) weak var indicatorPresentingViewController: UIViewController?
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public init(viewController: UIViewController) {
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self.indicatorPresentingViewController = viewController
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}
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}
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