125 lines
3.4 KiB
Swift
125 lines
3.4 KiB
Swift
//
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// Copyright (c) 2021 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public protocol CVBackgroundContainerDelegate: AnyObject {
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func updateSelectionHighlight()
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func updateScrollingContent()
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}
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// MARK: -
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@objc
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public class CVBackgroundContainer: ManualLayoutViewWithLayer {
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private enum ZPositioning: CGFloat {
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case wallpaperContent = 0
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case wallpaperDimming = 1
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case selectionHighlight = 2
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}
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fileprivate var wallpaperView: WallpaperView?
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public let selectionHighlightView = SelectionHighlightView()
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@objc
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public weak var delegate: CVBackgroundContainerDelegate?
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public init() {
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super.init(name: "CVBackgroundContainer")
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self.shouldDeactivateConstraints = false
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self.isUserInteractionEnabled = false
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// Render all background views behind the collection view.
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self.layer.zPosition = -1
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selectionHighlightView.isUserInteractionEnabled = false
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addSubview(selectionHighlightView)
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selectionHighlightView.layer.zPosition = ZPositioning.selectionHighlight.rawValue
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#if TESTABLE_BUILD
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selectionHighlightView.accessibilityIdentifier = "selectionHighlightView"
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#endif
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}
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@available(*, unavailable, message: "use other constructor instead.")
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@objc
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public required init(name: String) {
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notImplemented()
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}
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public func set(wallpaperView: WallpaperView?) {
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self.wallpaperView?.contentView?.removeFromSuperview()
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self.wallpaperView?.dimmingView?.removeFromSuperview()
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self.wallpaperView = wallpaperView
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if let wallpaperView = wallpaperView {
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self.backgroundColor = .clear
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if let contentView = wallpaperView.contentView {
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addSubview(contentView)
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contentView.layer.zPosition = ZPositioning.wallpaperContent.rawValue
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}
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if let dimmingView = wallpaperView.dimmingView {
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addSubview(dimmingView)
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dimmingView.layer.zPosition = ZPositioning.wallpaperDimming.rawValue
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}
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setNeedsLayout()
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} else {
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self.backgroundColor = Theme.backgroundColor
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}
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}
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public override func layoutSubviews() {
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AssertIsOnMainThread()
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super.layoutSubviews()
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let shouldUpdateSelectionHighlight = selectionHighlightView.frame != bounds
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wallpaperView?.contentView?.frame = bounds
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wallpaperView?.dimmingView?.frame = bounds
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selectionHighlightView.frame = bounds
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delegate?.updateScrollingContent()
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if shouldUpdateSelectionHighlight {
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delegate?.updateSelectionHighlight()
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}
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}
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}
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// MARK: -
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@objc
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extension CVBackgroundContainer: WallpaperBlurProvider {
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public var wallpaperBlurState: WallpaperBlurState? {
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wallpaperView?.blurProvider?.wallpaperBlurState
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}
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}
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// MARK: -
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extension ConversationViewController: CVBackgroundContainerDelegate {
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var selectionHighlightView: SelectionHighlightView {
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backgroundContainer.selectionHighlightView
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}
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@objc
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public func updateScrollingContent() {
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AssertIsOnMainThread()
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for cell in collectionView.visibleCells {
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guard let cell = cell as? CVCell else {
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owsFailDebug("Invalid cell.")
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continue
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}
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cell.updateScrollingContent()
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}
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updateSelectionHighlight()
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}
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}
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