145 lines
3.3 KiB
Swift
145 lines
3.3 KiB
Swift
//
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// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import SignalCoreKit
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import YYImage
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public class CVUtils {
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@available(*, unavailable, message: "use other init() instead.")
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private init() {}
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private static let workQueue_userInitiated: DispatchQueue = {
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DispatchQueue(label: "org.signal.conversation-view.user-initiated",
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qos: .userInitiated,
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autoreleaseFrequency: .workItem)
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}()
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private static let workQueue_userInteractive: DispatchQueue = {
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DispatchQueue(label: "org.signal.conversation-view.user-interactive",
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qos: .userInteractive,
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autoreleaseFrequency: .workItem)
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}()
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public static func workQueue(isInitialLoad: Bool) -> DispatchQueue {
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isInitialLoad ? workQueue_userInteractive : workQueue_userInitiated
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}
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}
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// MARK: -
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public protocol CVView: UIView {
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func reset()
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}
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// MARK: -
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open class CVLabel: UILabel, CVView {
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public override func updateConstraints() {
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super.updateConstraints()
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deactivateAllConstraints()
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}
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public func reset() {
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// NOTE: we have to reset the attributed text and then the text;
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// this is the magic incantation that prevents properties from
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// a previously-set attributed string from applying to subsequent
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// attributed strings.
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self.attributedText = nil
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self.text = nil
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}
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}
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// MARK: -
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open class CVImageView: UIImageView, CVView {
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public override func updateConstraints() {
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super.updateConstraints()
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deactivateAllConstraints()
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}
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public func reset() {
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self.image = nil
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}
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// MARK: - Layout
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public typealias LayoutBlock = (UIView) -> Void
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private var layoutBlocks = [LayoutBlock]()
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public func addLayoutBlock(_ layoutBlock: @escaping LayoutBlock) {
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layoutBlocks.append(layoutBlock)
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}
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public override var bounds: CGRect {
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didSet {
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if oldValue.size != bounds.size {
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viewSizeDidChange()
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}
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}
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}
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public override var frame: CGRect {
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didSet {
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if oldValue.size != frame.size {
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viewSizeDidChange()
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}
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}
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}
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func viewSizeDidChange() {
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layoutSubviews()
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}
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open override func layoutSubviews() {
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layoutSubviews(skipLayoutBlocks: false)
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}
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public func layoutSubviews(skipLayoutBlocks: Bool = false) {
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AssertIsOnMainThread()
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super.layoutSubviews()
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if !skipLayoutBlocks {
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applyLayoutBlocks()
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}
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}
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public func applyLayoutBlocks() {
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AssertIsOnMainThread()
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for layoutBlock in layoutBlocks {
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layoutBlock(self)
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}
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}
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// MARK: - Circles
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public static func circleView() -> CVImageView {
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let result = CVImageView()
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result.addLayoutBlock { view in
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view.layer.cornerRadius = min(view.width, view.height) * 0.5
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}
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return result
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}
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}
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// MARK: -
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open class CVAnimatedImageView: YYAnimatedImageView, CVView {
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public override func updateConstraints() {
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super.updateConstraints()
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deactivateAllConstraints()
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}
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public func reset() {
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self.image = nil
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}
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}
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