64 lines
2.4 KiB
Swift
64 lines
2.4 KiB
Swift
// (c) 2022 and onwards Qwertyyb (MIT License).
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// ====================
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// This code is released under the MIT license (SPDX-License-Identifier: MIT)
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import AppKit
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private extension Date {
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static func - (lhs: Date, rhs: Date) -> TimeInterval {
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lhs.timeIntervalSinceReferenceDate - rhs.timeIntervalSinceReferenceDate
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}
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}
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public struct ShiftKeyUpChecker {
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// MARK: - 威注音輸入法專有部分
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public init(useLShift: Bool = false, useRShift: Bool = false) {
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toggleWithLShift = useLShift
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toggleWithRShift = useRShift
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}
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public var toggleWithLShift = false
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public var toggleWithRShift = false
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public var lShiftKeyCode: UInt16 = 56
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public var rShiftKeyCode: UInt16 = 60
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public var enabled: Bool { toggleWithLShift || toggleWithRShift }
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private var checkModifier: NSEvent.ModifierFlags { .shift }
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private var checkKeyCode: [UInt16] {
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var result = [UInt16]()
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if toggleWithLShift { result.append(lShiftKeyCode) }
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if toggleWithRShift { result.append(rShiftKeyCode) }
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return result
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}
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// MARK: - 與業火五筆共用的內容
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/// 實現邏輯基本上是相同的，只是威注音這邊的行文風格習慣可能與業火五筆有不同。
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private let delayInterval = 0.3
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private var previousKeyCode: UInt16?
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private var lastTime: Date = .init()
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private mutating func registerModifierKeyDown(event: NSEvent) {
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var isKeyDown: Bool = event.type == .flagsChanged
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// 注意：ModifierFlags 是 OptionSet，在使用 contains 時會在給定參數是「空集合」的時候返回 true（明明你可能想要 false）。
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isKeyDown = isKeyDown && event.modifierFlags.intersection(.deviceIndependentFlagsMask) == checkModifier
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isKeyDown = isKeyDown && checkKeyCode.contains(event.keyCode)
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lastTime = isKeyDown ? .init() : .init(timeInterval: .infinity * -1, since: Date())
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previousKeyCode = isKeyDown ? event.keyCode : nil
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}
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// To confirm that only the shift key is "pressed-and-released".
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public mutating func check(_ event: NSEvent) -> Bool {
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var met: Bool = event.type == .flagsChanged
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met = met && checkKeyCode.contains(event.keyCode)
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met = met && event.keyCode == previousKeyCode // 檢查 KeyCode 一致性。
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met = met && event.modifierFlags.intersection(.deviceIndependentFlagsMask).isEmpty
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met = met && Date() - lastTime <= delayInterval
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_ = met ? lastTime = Date(timeInterval: .infinity * -1, since: Date()) : registerModifierKeyDown(event: event)
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return met
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}
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}
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