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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| // | ||
| // DisplayLinkAnimator.swift | ||
| // TGUIKit | ||
| // | ||
| // Created by Mikhail Filimonov on 30/09/2019. | ||
| // Copyright © 2019 Telegram. All rights reserved. | ||
| // | ||
|
|
||
| import Cocoa | ||
| import SwiftSignalKitMac | ||
|
|
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| private final class DisplayLinkTarget: NSObject { | ||
| private let f: () -> Void | ||
|
|
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| init(_ f: @escaping () -> Void) { | ||
| self.f = f | ||
| } | ||
|
|
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| @objc func event() { | ||
| self.f() | ||
| } | ||
| } | ||
|
|
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| public final class DisplayLinkAnimator { | ||
| private var displayLink: SwiftSignalKitMac.Timer! | ||
| private let duration: Double | ||
| private let fromValue: CGFloat | ||
| private let toValue: CGFloat | ||
| private let startTime: Double | ||
| private let update: (CGFloat) -> Void | ||
| private let completion: () -> Void | ||
| private var completed = false | ||
|
|
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| public init(duration: Double, from fromValue: CGFloat, to toValue: CGFloat, update: @escaping (CGFloat) -> Void, completion: @escaping () -> Void) { | ||
| self.duration = duration | ||
| self.fromValue = fromValue | ||
| self.toValue = toValue | ||
| self.update = update | ||
| self.completion = completion | ||
|
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| self.startTime = CACurrentMediaTime() | ||
|
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| self.displayLink = SwiftSignalKitMac.Timer.init(timeout: 0.016, repeat: true, completion: { [weak self] in | ||
| self?.tick() | ||
| }, queue: .mainQueue()) | ||
|
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| self.displayLink.start() | ||
| } | ||
|
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| deinit { | ||
| self.displayLink.invalidate() | ||
| } | ||
|
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| public func invalidate() { | ||
| self.displayLink.invalidate() | ||
| } | ||
|
|
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| @objc private func tick() { | ||
| if self.completed { | ||
| return | ||
| } | ||
| let timestamp = CACurrentMediaTime() | ||
| var t = (timestamp - self.startTime) / self.duration | ||
| t = max(0.0, t) | ||
| t = min(1.0, t) | ||
| self.update(self.fromValue * CGFloat(1 - t) + self.toValue * CGFloat(t)) | ||
| if abs(t - 1.0) < Double.ulpOfOne { | ||
| self.completed = true | ||
| self.displayLink.invalidate() | ||
| self.completion() | ||
| } | ||
| } | ||
| } | ||
|
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| public final class ConstantDisplayLinkAnimator { | ||
| private var displayLink: SwiftSignalKitMac.Timer? | ||
| private let update: () -> Void | ||
| private var completed = false | ||
|
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| public var isPaused: Bool = true { | ||
| didSet { | ||
| if self.isPaused != oldValue { | ||
| if self.isPaused { | ||
| self.displayLink?.invalidate() | ||
| } else { | ||
| self.displayLink = SwiftSignalKitMac.Timer(timeout: 0.016, repeat: true, completion: { [weak self] in | ||
| self?.tick() | ||
| }, queue: .mainQueue()) | ||
|
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| self.displayLink?.start() | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| public init(update: @escaping () -> Void) { | ||
| self.update = update | ||
| } | ||
|
|
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| deinit { | ||
| self.displayLink?.invalidate() | ||
| } | ||
|
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| public func invalidate() { | ||
| self.displayLink?.invalidate() | ||
| } | ||
|
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| @objc private func tick() { | ||
| if self.completed { | ||
| return | ||
| } | ||
| self.update() | ||
| } | ||
| } | ||
|
|
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