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Separate modifier event handling (#52)
* Separate modifier event handling * Add modifier event handling tests * swiftlint
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| // | ||
| // ModifierEventHandler.swift | ||
| // | ||
| // Magnet | ||
| // GitHub: https://github.com/clipy | ||
| // HP: https://clipy-app.com | ||
| // | ||
| // Copyright © 2015-2020 Clipy Project. | ||
| // | ||
|
|
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| import Cocoa | ||
|
|
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| public final class ModifierEventHandler { | ||
|
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| // MARK: - Properties | ||
| public var doubleTapped: ((NSEvent.ModifierFlags) -> Void)? | ||
|
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| private var tappingModifierFlags = NSEvent.ModifierFlags() | ||
| private var isTappingMultiModifiers = false | ||
| private var lastHandledEventTimestamp: TimeInterval? | ||
| private let cleanTimeInterval: DispatchTimeInterval | ||
| private let cleanQueue: DispatchQueue | ||
|
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| // MARK: - Initialize | ||
| init(cleanTimeInterval: DispatchTimeInterval = .milliseconds(300), cleanQueue: DispatchQueue = .main) { | ||
| self.cleanTimeInterval = cleanTimeInterval | ||
| self.cleanQueue = cleanQueue | ||
| } | ||
|
|
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| } | ||
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| // MARK: - Handling | ||
| public extension ModifierEventHandler { | ||
| func handleModifiersEvent(with modifierFlags: NSEvent.ModifierFlags, timestamp: TimeInterval) { | ||
| guard lastHandledEventTimestamp != timestamp else { return } | ||
| lastHandledEventTimestamp = timestamp | ||
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| handleDoubleTapModifierEvent(modifierFlags: modifierFlags) | ||
| } | ||
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| private func handleDoubleTapModifierEvent(modifierFlags: NSEvent.ModifierFlags) { | ||
| let tappedModifierFlags = modifierFlags.filterUnsupportModifiers() | ||
| let commandTapped = tappedModifierFlags.contains(.command) | ||
| let shiftTapped = tappedModifierFlags.contains(.shift) | ||
| let controlTapped = tappedModifierFlags.contains(.control) | ||
| let optionTapped = tappedModifierFlags.contains(.option) | ||
| let tappedModifierCount = [commandTapped, shiftTapped, controlTapped, optionTapped].trueCount | ||
| guard tappedModifierCount != 0 else { return } | ||
| guard tappedModifierCount == 1 else { | ||
| isTappingMultiModifiers = true | ||
| return | ||
| } | ||
| guard !isTappingMultiModifiers else { | ||
| isTappingMultiModifiers = false | ||
| return | ||
| } | ||
| if (tappingModifierFlags.contains(.command) && commandTapped) || | ||
| (tappingModifierFlags.contains(.shift) && shiftTapped) || | ||
| (tappingModifierFlags.contains(.control) && controlTapped) || | ||
| (tappingModifierFlags.contains(.option) && optionTapped) { | ||
| doubleTapped?(tappingModifierFlags) | ||
| tappingModifierFlags = NSEvent.ModifierFlags() | ||
| } else { | ||
| tappingModifierFlags = tappedModifierFlags | ||
| } | ||
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| // After a certain amount of time, the tapped modifier will be reset. | ||
| cleanQueue.asyncAfter(deadline: .now() + cleanTimeInterval) { [weak self] in | ||
| self?.tappingModifierFlags = NSEvent.ModifierFlags() | ||
| } | ||
| } | ||
| } |
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