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Merge pull request #150 from iglance/release/v2.0.6
Release/v2.0.6
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| Original file line number | Diff line number | Diff line change |
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| // Copyright (C) 2020 D0miH <https://github.com/D0miH> & Contributors <https://github.com/iglance/iGlance/graphs/contributors> | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
|
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| import Foundation | ||
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| /** | ||
| * This class is a timer that is reaping a given event handler every time interval. | ||
| * | ||
| * This class is taken from https://gist.github.com/danielgalasko/1da90276f23ea24cb3467c33d2c05768#file-repeatingtimer-swift. | ||
| * Huge thanks to Daniel Galasko <https://github.com/danielgalasko> for providing this code. | ||
| */ | ||
| class RepeatingTimer { | ||
| let timeInterval: TimeInterval | ||
|
|
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| init(timeInterval: TimeInterval) { | ||
| self.timeInterval = timeInterval | ||
| } | ||
|
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| private lazy var timer: DispatchSourceTimer = { | ||
| let timer = DispatchSource.makeTimerSource() | ||
| timer.schedule(deadline: .now() + self.timeInterval, repeating: self.timeInterval) | ||
| timer.setEventHandler { [weak self] in | ||
| self?.eventHandler?() | ||
| } | ||
| return timer | ||
| }() | ||
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| var eventHandler: (() -> Void)? | ||
|
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| private enum State { | ||
| case suspended | ||
| case resumed | ||
| } | ||
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| private var state: State = .suspended | ||
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| deinit { | ||
| timer.setEventHandler {} | ||
| timer.cancel() | ||
| /* | ||
| If the timer is suspended, calling cancel without resuming | ||
| triggers a crash. This is documented here https://forums.developer.apple.com/thread/15902 | ||
| */ | ||
| resume() | ||
| eventHandler = nil | ||
| } | ||
|
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| func resume() { | ||
| if state == .resumed { | ||
| return | ||
| } | ||
| state = .resumed | ||
| timer.resume() | ||
| } | ||
|
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| func suspend() { | ||
| if state == .suspended { | ||
| return | ||
| } | ||
| state = .suspended | ||
| timer.suspend() | ||
| } | ||
| } |
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