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// The MIT License (MIT)
//
// Copyright (c) 2016 Luke Zhao <me@lkzhao.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#if canImport(UIKit)
import QuartzCore
protocol HeroProgressRunnerDelegate: AnyObject {
func updateProgress(progress: Double)
func complete(finished: Bool)
}
class HeroProgressRunner {
weak var delegate: HeroProgressRunnerDelegate?
var isRunning: Bool {
return displayLink != nil
}
internal var timePassed: TimeInterval = 0.0
internal var duration: TimeInterval = 0.0
internal var isReversed: Bool = false
internal var displayLink: CADisplayLink?
@objc func displayUpdate(_ link: CADisplayLink) {
timePassed += isReversed ? -link.duration : link.duration
if isReversed, timePassed <= 1.0 / 120 {
delegate?.complete(finished: false)
stop()
return
}
if !isReversed, timePassed > duration - 1.0 / 120 {
delegate?.complete(finished: true)
stop()
return
}
delegate?.updateProgress(progress: timePassed / duration)
}
func start(timePassed: TimeInterval, totalTime: TimeInterval, reverse: Bool) {
stop()
self.timePassed = timePassed
self.isReversed = reverse
self.duration = totalTime
displayLink = CADisplayLink(target: self, selector: #selector(displayUpdate(_:)))
displayLink!.add(to: .main, forMode: RunLoop.Mode.common)
}
func stop() {
displayLink?.isPaused = true
displayLink?.remove(from: RunLoop.main, forMode: RunLoop.Mode.common)
displayLink = nil
}
}
#endif