108 lines
3.4 KiB
Swift
108 lines
3.4 KiB
Swift
import CapswitchHID
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import Foundation
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enum HIDRemapError: LocalizedError {
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case failure(Int32)
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var errorDescription: String? {
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switch self {
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case let .failure(code):
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switch code {
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case 1:
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return "Not enough memory to manage keyboard mappings."
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case 2:
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return "Cannot access IOKit keyboard services. Check Capswitch's macOS privacy permissions."
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case 3:
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return "No HID keyboard services found. Connect a keyboard and retry."
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case 4:
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return "An existing keyboard mapping has an unsupported format. No unrelated mappings were changed."
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case 5:
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return "Caps Lock or F19 already has a conflicting mapping. Capswitch will not overwrite it."
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case 6:
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return "macOS rejected the native Caps → F19 mapping for a keyboard."
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case 7:
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return "A keyboard did not confirm the Caps → F19 mapping."
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case 8:
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return "Could not identify a keyboard service safely."
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default:
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return "Native IOKit keyboard remapping failed (code \(code))."
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}
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}
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}
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}
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/// Owns the native IOKit remapping manager inside Capswitch itself.
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/// No subprocess, hidutil, privileged helper, driver or third-party library.
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final class HIDRemappingController {
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private let manager: UnsafeMutableRawPointer?
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private(set) var isInstalled = false
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private(set) var keyboardServiceCount: UInt32 = 0
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private(set) var mappedServiceCount: UInt32 = 0
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init() {
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manager = CapswitchRemapperCreate()
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}
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deinit {
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if let manager {
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CapswitchRemapperDestroy(manager)
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}
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}
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func ensureInstalled() throws {
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guard let manager else {
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throw HIDRemapError.failure(1)
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}
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var keyboardCount: UInt32 = 0
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var mappedCount: UInt32 = 0
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let status = CapswitchRemapperApply(manager, &keyboardCount, &mappedCount)
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keyboardServiceCount = keyboardCount
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mappedServiceCount = mappedCount
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isInstalled = status == 0 && keyboardCount > 0
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&& mappedCount == keyboardCount
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guard status == 0, isInstalled else {
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throw HIDRemapError.failure(status == 0 ? 7 : status)
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}
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}
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func reapplyIfOwned() throws {
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// Reconciliation is idempotent: the native layer checks every
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// keyboard and only installs missing mappings it can safely own.
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try ensureInstalled()
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}
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func inspect() throws {
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guard let manager else {
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throw HIDRemapError.failure(1)
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}
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var keyboardCount: UInt32 = 0
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var mappedCount: UInt32 = 0
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let status = CapswitchRemapperInspect(manager, &keyboardCount, &mappedCount)
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keyboardServiceCount = keyboardCount
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mappedServiceCount = mappedCount
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guard status == 0 else {
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throw HIDRemapError.failure(status)
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}
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}
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func restoreIfOwned() throws {
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guard let manager else {
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throw HIDRemapError.failure(1)
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}
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let status = CapswitchRemapperRestore(manager)
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guard status == 0 else {
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throw HIDRemapError.failure(status)
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}
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isInstalled = false
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keyboardServiceCount = 0
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mappedServiceCount = 0
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}
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}
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