app/darwin_desktop.go - mobile - Git at Google

 // Copyright 2014 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 //go:build darwin && !ios

 package app

 // Simple on-screen app debugging for OS X. Not an officially supported
 // development target for apps, as screens with mice are very different
 // than screens with touch panels.

 /*
 #cgo CFLAGS: -x objective-c -DGL_SILENCE_DEPRECATION
 #cgo LDFLAGS: -framework Cocoa -framework OpenGL
 #import <Carbon/Carbon.h> // for HIToolbox/Events.h
 #import <Cocoa/Cocoa.h>
 #include <pthread.h>

 void runApp(void);
 void stopApp(void);
 void makeCurrentContext(GLintptr);
 uint64 threadID();
 */
 import "C"
 import (
 	"log"
 	"runtime"
 	"sync"

 	"golang.org/x/mobile/event/key"
 	"golang.org/x/mobile/event/lifecycle"
 	"golang.org/x/mobile/event/paint"
 	"golang.org/x/mobile/event/size"
 	"golang.org/x/mobile/event/touch"
 	"golang.org/x/mobile/geom"
 )

 var initThreadID uint64

 func init() {
 	// Lock the goroutine responsible for initialization to an OS thread.
 	// This means the goroutine running main (and calling runApp below)
 	// is locked to the OS thread that started the program. This is
 	// necessary for the correct delivery of Cocoa events to the process.
 	//
 	// A discussion on this topic:
 	// https://groups.google.com/forum/#!msg/golang-nuts/IiWZ2hUuLDA/SNKYYZBelsYJ
 	runtime.LockOSThread()
 	initThreadID = uint64(C.threadID())
 }

 func main(f func(App)) {
 	if tid := uint64(C.threadID()); tid != initThreadID {
 		log.Fatalf("app.Main called on thread %d, but app.init ran on %d", tid, initThreadID)
 	}

 	go func() {
 		f(theApp)
 		C.stopApp()
 	}()

 	C.runApp()
 }

 // loop is the primary drawing loop.
 //
 // After Cocoa has captured the initial OS thread for processing Cocoa
 // events in runApp, it starts loop on another goroutine. It is locked
 // to an OS thread for its OpenGL context.
 //
 // The loop processes GL calls until a publish event appears.
 // Then it runs any remaining GL calls and flushes the screen.
 //
 // As NSOpenGLCPSwapInterval is set to 1, the call to CGLFlushDrawable
 // blocks until the screen refresh.
 func (a *app) loop(ctx C.GLintptr) {
 	runtime.LockOSThread()
 	C.makeCurrentContext(ctx)

 	workAvailable := a.worker.WorkAvailable()

 	for {
 		select {
 		case <-workAvailable:
 			a.worker.DoWork()
 		case <-theApp.publish:
 		loop1:
 			for {
 				select {
 				case <-workAvailable:
 					a.worker.DoWork()
 				default:
 					break loop1
 				}
 			}
 			C.CGLFlushDrawable(C.CGLGetCurrentContext())
 			theApp.publishResult <- PublishResult{}
 			select {
 			case drawDone <- struct{}{}:
 			default:
 			}
 		}
 	}
 }

 var drawDone = make(chan struct{})

 // drawgl is used by Cocoa to occasionally request screen updates.
 //
 //export drawgl
 func drawgl() {
 	switch theApp.lifecycleStage {
 	case lifecycle.StageFocused, lifecycle.StageVisible:
 		theApp.Send(paint.Event{
 			External: true,
 		})
 		<-drawDone
 	}
 }

 //export startloop
 func startloop(ctx C.GLintptr) {
 	go theApp.loop(ctx)
 }

 var windowHeightPx float32

 //export setGeom
 func setGeom(pixelsPerPt float32, widthPx, heightPx int) {
 	windowHeightPx = float32(heightPx)
 	theApp.eventsIn <- size.Event{
 		WidthPx:     widthPx,
 		HeightPx:    heightPx,
 		WidthPt:     geom.Pt(float32(widthPx) / pixelsPerPt),
 		HeightPt:    geom.Pt(float32(heightPx) / pixelsPerPt),
 		PixelsPerPt: pixelsPerPt,
 	}
 }

 var touchEvents struct {
 	sync.Mutex
 	pending []touch.Event
 }

 func sendTouch(t touch.Type, x, y float32) {
 	theApp.eventsIn <- touch.Event{
 		X:        x,
 		Y:        windowHeightPx - y,
 		Sequence: 0,
 		Type:     t,
 	}
 }

 //export eventMouseDown
 func eventMouseDown(x, y float32) { sendTouch(touch.TypeBegin, x, y) }

 //export eventMouseDragged
 func eventMouseDragged(x, y float32) { sendTouch(touch.TypeMove, x, y) }

 //export eventMouseEnd
 func eventMouseEnd(x, y float32) { sendTouch(touch.TypeEnd, x, y) }

 //export lifecycleDead
 func lifecycleDead() { theApp.sendLifecycle(lifecycle.StageDead) }

 //export eventKey
 func eventKey(runeVal int32, direction uint8, code uint16, flags uint32) {
 	var modifiers key.Modifiers
 	for _, mod := range mods {
 		if flags&mod.flags == mod.flags {
 			modifiers |= mod.mod
 		}
 	}

 	theApp.eventsIn <- key.Event{
 		Rune:      convRune(rune(runeVal)),
 		Code:      convVirtualKeyCode(code),
 		Modifiers: modifiers,
 		Direction: key.Direction(direction),
 	}
 }

 //export eventFlags
 func eventFlags(flags uint32) {
 	for _, mod := range mods {
 		if flags&mod.flags == mod.flags && lastFlags&mod.flags != mod.flags {
 			eventKey(-1, uint8(key.DirPress), mod.code, flags)
 		}
 		if lastFlags&mod.flags == mod.flags && flags&mod.flags != mod.flags {
 			eventKey(-1, uint8(key.DirRelease), mod.code, flags)
 		}
 	}
 	lastFlags = flags
 }

 var lastFlags uint32

 var mods = [...]struct {
 	flags uint32
 	code  uint16
 	mod   key.Modifiers
 }{
 	// Left and right variants of modifier keys have their own masks,
 	// but they are not documented. These were determined empirically.
 	{1<<17 | 0x102, C.kVK_Shift, key.ModShift},
 	{1<<17 | 0x104, C.kVK_RightShift, key.ModShift},
 	{1<<18 | 0x101, C.kVK_Control, key.ModControl},
 	// TODO key.ControlRight
 	{1<<19 | 0x120, C.kVK_Option, key.ModAlt},
 	{1<<19 | 0x140, C.kVK_RightOption, key.ModAlt},
 	{1<<20 | 0x108, C.kVK_Command, key.ModMeta},
 	{1<<20 | 0x110, C.kVK_Command, key.ModMeta}, // TODO: missing kVK_RightCommand
 }

 //export lifecycleAlive
 func lifecycleAlive() { theApp.sendLifecycle(lifecycle.StageAlive) }

 //export lifecycleVisible
 func lifecycleVisible() {
 	theApp.sendLifecycle(lifecycle.StageVisible)
 }

 //export lifecycleFocused
 func lifecycleFocused() { theApp.sendLifecycle(lifecycle.StageFocused) }

 // convRune marks the Carbon/Cocoa private-range unicode rune representing
 // a non-unicode key event to -1, used for Rune in the key package.
 //
 // http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/CORPCHAR.TXT
 func convRune(r rune) rune {
 	if '\uE000' <= r && r <= '\uF8FF' {
 		return -1
 	}
 	return r
 }

 // convVirtualKeyCode converts a Carbon/Cocoa virtual key code number
 // into the standard keycodes used by the key package.
 //
 // To get a sense of the key map, see the diagram on
 //
 //	http://boredzo.org/blog/archives/2007-05-22/virtual-key-codes
 func convVirtualKeyCode(vkcode uint16) key.Code {
 	switch vkcode {
 	case C.kVK_ANSI_A:
 		return key.CodeA
 	case C.kVK_ANSI_B:
 		return key.CodeB
 	case C.kVK_ANSI_C:
 		return key.CodeC
 	case C.kVK_ANSI_D:
 		return key.CodeD
 	case C.kVK_ANSI_E:
 		return key.CodeE
 	case C.kVK_ANSI_F:
 		return key.CodeF
 	case C.kVK_ANSI_G:
 		return key.CodeG
 	case C.kVK_ANSI_H:
 		return key.CodeH
 	case C.kVK_ANSI_I:
 		return key.CodeI
 	case C.kVK_ANSI_J:
 		return key.CodeJ
 	case C.kVK_ANSI_K:
 		return key.CodeK
 	case C.kVK_ANSI_L:
 		return key.CodeL
 	case C.kVK_ANSI_M:
 		return key.CodeM
 	case C.kVK_ANSI_N:
 		return key.CodeN
 	case C.kVK_ANSI_O:
 		return key.CodeO
 	case C.kVK_ANSI_P:
 		return key.CodeP
 	case C.kVK_ANSI_Q:
 		return key.CodeQ
 	case C.kVK_ANSI_R:
 		return key.CodeR
 	case C.kVK_ANSI_S:
 		return key.CodeS
 	case C.kVK_ANSI_T:
 		return key.CodeT
 	case C.kVK_ANSI_U:
 		return key.CodeU
 	case C.kVK_ANSI_V:
 		return key.CodeV
 	case C.kVK_ANSI_W:
 		return key.CodeW
 	case C.kVK_ANSI_X:
 		return key.CodeX
 	case C.kVK_ANSI_Y:
 		return key.CodeY
 	case C.kVK_ANSI_Z:
 		return key.CodeZ
 	case C.kVK_ANSI_1:
 		return key.Code1
 	case C.kVK_ANSI_2:
 		return key.Code2
 	case C.kVK_ANSI_3:
 		return key.Code3
 	case C.kVK_ANSI_4:
 		return key.Code4
 	case C.kVK_ANSI_5:
 		return key.Code5
 	case C.kVK_ANSI_6:
 		return key.Code6
 	case C.kVK_ANSI_7:
 		return key.Code7
 	case C.kVK_ANSI_8:
 		return key.Code8
 	case C.kVK_ANSI_9:
 		return key.Code9
 	case C.kVK_ANSI_0:
 		return key.Code0
 	// TODO: move the rest of these codes to constants in key.go
 	// if we are happy with them.
 	case C.kVK_Return:
 		return key.CodeReturnEnter
 	case C.kVK_Escape:
 		return key.CodeEscape
 	case C.kVK_Delete:
 		return key.CodeDeleteBackspace
 	case C.kVK_Tab:
 		return key.CodeTab
 	case C.kVK_Space:
 		return key.CodeSpacebar
 	case C.kVK_ANSI_Minus:
 		return key.CodeHyphenMinus
 	case C.kVK_ANSI_Equal:
 		return key.CodeEqualSign
 	case C.kVK_ANSI_LeftBracket:
 		return key.CodeLeftSquareBracket
 	case C.kVK_ANSI_RightBracket:
 		return key.CodeRightSquareBracket
 	case C.kVK_ANSI_Backslash:
 		return key.CodeBackslash
 	// 50: Keyboard Non-US "#" and ~
 	case C.kVK_ANSI_Semicolon:
 		return key.CodeSemicolon
 	case C.kVK_ANSI_Quote:
 		return key.CodeApostrophe
 	case C.kVK_ANSI_Grave:
 		return key.CodeGraveAccent
 	case C.kVK_ANSI_Comma:
 		return key.CodeComma
 	case C.kVK_ANSI_Period:
 		return key.CodeFullStop
 	case C.kVK_ANSI_Slash:
 		return key.CodeSlash
 	case C.kVK_CapsLock:
 		return key.CodeCapsLock
 	case C.kVK_F1:
 		return key.CodeF1
 	case C.kVK_F2:
 		return key.CodeF2
 	case C.kVK_F3:
 		return key.CodeF3
 	case C.kVK_F4:
 		return key.CodeF4
 	case C.kVK_F5:
 		return key.CodeF5
 	case C.kVK_F6:
 		return key.CodeF6
 	case C.kVK_F7:
 		return key.CodeF7
 	case C.kVK_F8:
 		return key.CodeF8
 	case C.kVK_F9:
 		return key.CodeF9
 	case C.kVK_F10:
 		return key.CodeF10
 	case C.kVK_F11:
 		return key.CodeF11
 	case C.kVK_F12:
 		return key.CodeF12
 	// 70: PrintScreen
 	// 71: Scroll Lock
 	// 72: Pause
 	// 73: Insert
 	case C.kVK_Home:
 		return key.CodeHome
 	case C.kVK_PageUp:
 		return key.CodePageUp
 	case C.kVK_ForwardDelete:
 		return key.CodeDeleteForward
 	case C.kVK_End:
 		return key.CodeEnd
 	case C.kVK_PageDown:
 		return key.CodePageDown
 	case C.kVK_RightArrow:
 		return key.CodeRightArrow
 	case C.kVK_LeftArrow:
 		return key.CodeLeftArrow
 	case C.kVK_DownArrow:
 		return key.CodeDownArrow
 	case C.kVK_UpArrow:
 		return key.CodeUpArrow
 	case C.kVK_ANSI_KeypadClear:
 		return key.CodeKeypadNumLock
 	case C.kVK_ANSI_KeypadDivide:
 		return key.CodeKeypadSlash
 	case C.kVK_ANSI_KeypadMultiply:
 		return key.CodeKeypadAsterisk
 	case C.kVK_ANSI_KeypadMinus:
 		return key.CodeKeypadHyphenMinus
 	case C.kVK_ANSI_KeypadPlus:
 		return key.CodeKeypadPlusSign
 	case C.kVK_ANSI_KeypadEnter:
 		return key.CodeKeypadEnter
 	case C.kVK_ANSI_Keypad1:
 		return key.CodeKeypad1
 	case C.kVK_ANSI_Keypad2:
 		return key.CodeKeypad2
 	case C.kVK_ANSI_Keypad3:
 		return key.CodeKeypad3
 	case C.kVK_ANSI_Keypad4:
 		return key.CodeKeypad4
 	case C.kVK_ANSI_Keypad5:
 		return key.CodeKeypad5
 	case C.kVK_ANSI_Keypad6:
 		return key.CodeKeypad6
 	case C.kVK_ANSI_Keypad7:
 		return key.CodeKeypad7
 	case C.kVK_ANSI_Keypad8:
 		return key.CodeKeypad8
 	case C.kVK_ANSI_Keypad9:
 		return key.CodeKeypad9
 	case C.kVK_ANSI_Keypad0:
 		return key.CodeKeypad0
 	case C.kVK_ANSI_KeypadDecimal:
 		return key.CodeKeypadFullStop
 	case C.kVK_ANSI_KeypadEquals:
 		return key.CodeKeypadEqualSign
 	case C.kVK_F13:
 		return key.CodeF13
 	case C.kVK_F14:
 		return key.CodeF14
 	case C.kVK_F15:
 		return key.CodeF15
 	case C.kVK_F16:
 		return key.CodeF16
 	case C.kVK_F17:
 		return key.CodeF17
 	case C.kVK_F18:
 		return key.CodeF18
 	case C.kVK_F19:
 		return key.CodeF19
 	case C.kVK_F20:
 		return key.CodeF20
 	// 116: Keyboard Execute
 	case C.kVK_Help:
 		return key.CodeHelp
 	// 118: Keyboard Menu
 	// 119: Keyboard Select
 	// 120: Keyboard Stop
 	// 121: Keyboard Again
 	// 122: Keyboard Undo
 	// 123: Keyboard Cut
 	// 124: Keyboard Copy
 	// 125: Keyboard Paste
 	// 126: Keyboard Find
 	case C.kVK_Mute:
 		return key.CodeMute
 	case C.kVK_VolumeUp:
 		return key.CodeVolumeUp
 	case C.kVK_VolumeDown:
 		return key.CodeVolumeDown
 	// 130: Keyboard Locking Caps Lock
 	// 131: Keyboard Locking Num Lock
 	// 132: Keyboard Locking Scroll Lock
 	// 133: Keyboard Comma
 	// 134: Keyboard Equal Sign
 	// ...: Bunch of stuff
 	case C.kVK_Control:
 		return key.CodeLeftControl
 	case C.kVK_Shift:
 		return key.CodeLeftShift
 	case C.kVK_Option:
 		return key.CodeLeftAlt
 	case C.kVK_Command:
 		return key.CodeLeftGUI
 	case C.kVK_RightControl:
 		return key.CodeRightControl
 	case C.kVK_RightShift:
 		return key.CodeRightShift
 	case C.kVK_RightOption:
 		return key.CodeRightAlt
 	// TODO key.CodeRightGUI
 	default:
 		return key.CodeUnknown
 	}
 }
	// Copyright 2014 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	//go:build darwin && !ios

	package app

	// Simple on-screen app debugging for OS X. Not an officially supported
	// development target for apps, as screens with mice are very different
	// than screens with touch panels.

	/*
	#cgo CFLAGS: -x objective-c -DGL_SILENCE_DEPRECATION
	#cgo LDFLAGS: -framework Cocoa -framework OpenGL
	#import <Carbon/Carbon.h> // for HIToolbox/Events.h
	#import <Cocoa/Cocoa.h>
	#include <pthread.h>

	void runApp(void);
	void stopApp(void);
	void makeCurrentContext(GLintptr);
	uint64 threadID();
	*/
	import "C"
	import (
	"log"
	"runtime"
	"sync"

	"golang.org/x/mobile/event/key"
	"golang.org/x/mobile/event/lifecycle"
	"golang.org/x/mobile/event/paint"
	"golang.org/x/mobile/event/size"
	"golang.org/x/mobile/event/touch"
	"golang.org/x/mobile/geom"
	)

	var initThreadID uint64

	func init() {
	// Lock the goroutine responsible for initialization to an OS thread.
	// This means the goroutine running main (and calling runApp below)
	// is locked to the OS thread that started the program. This is
	// necessary for the correct delivery of Cocoa events to the process.
	//
	// A discussion on this topic:
	// https://groups.google.com/forum/#!msg/golang-nuts/IiWZ2hUuLDA/SNKYYZBelsYJ
	runtime.LockOSThread()
	initThreadID = uint64(C.threadID())
	}

	func main(f func(App)) {
	if tid := uint64(C.threadID()); tid != initThreadID {
	log.Fatalf("app.Main called on thread %d, but app.init ran on %d", tid, initThreadID)
	}

	go func() {
	f(theApp)
	C.stopApp()
	}()

	C.runApp()
	}

	// loop is the primary drawing loop.
	//
	// After Cocoa has captured the initial OS thread for processing Cocoa
	// events in runApp, it starts loop on another goroutine. It is locked
	// to an OS thread for its OpenGL context.
	//
	// The loop processes GL calls until a publish event appears.
	// Then it runs any remaining GL calls and flushes the screen.
	//
	// As NSOpenGLCPSwapInterval is set to 1, the call to CGLFlushDrawable
	// blocks until the screen refresh.
	func (a *app) loop(ctx C.GLintptr) {
	runtime.LockOSThread()
	C.makeCurrentContext(ctx)

	workAvailable := a.worker.WorkAvailable()

	for {
	select {
	case <-workAvailable:
	a.worker.DoWork()
	case <-theApp.publish:
	loop1:
	for {
	select {
	case <-workAvailable:
	a.worker.DoWork()
	default:
	break loop1
	}
	}
	C.CGLFlushDrawable(C.CGLGetCurrentContext())
	theApp.publishResult <- PublishResult{}
	select {
	case drawDone <- struct{}{}:
	default:
	}
	}
	}
	}

	var drawDone = make(chan struct{})

	// drawgl is used by Cocoa to occasionally request screen updates.
	//
	//export drawgl
	func drawgl() {
	switch theApp.lifecycleStage {
	case lifecycle.StageFocused, lifecycle.StageVisible:
	theApp.Send(paint.Event{
	External: true,
	})
	<-drawDone
	}
	}

	//export startloop
	func startloop(ctx C.GLintptr) {
	go theApp.loop(ctx)
	}

	var windowHeightPx float32

	//export setGeom
	func setGeom(pixelsPerPt float32, widthPx, heightPx int) {
	windowHeightPx = float32(heightPx)
	theApp.eventsIn <- size.Event{
	WidthPx: widthPx,
	HeightPx: heightPx,
	WidthPt: geom.Pt(float32(widthPx) / pixelsPerPt),
	HeightPt: geom.Pt(float32(heightPx) / pixelsPerPt),
	PixelsPerPt: pixelsPerPt,
	}
	}

	var touchEvents struct {
	sync.Mutex
	pending []touch.Event
	}

	func sendTouch(t touch.Type, x, y float32) {
	theApp.eventsIn <- touch.Event{
	X: x,
	Y: windowHeightPx - y,
	Sequence: 0,
	Type: t,
	}
	}

	//export eventMouseDown
	func eventMouseDown(x, y float32) { sendTouch(touch.TypeBegin, x, y) }

	//export eventMouseDragged
	func eventMouseDragged(x, y float32) { sendTouch(touch.TypeMove, x, y) }

	//export eventMouseEnd
	func eventMouseEnd(x, y float32) { sendTouch(touch.TypeEnd, x, y) }

	//export lifecycleDead
	func lifecycleDead() { theApp.sendLifecycle(lifecycle.StageDead) }

	//export eventKey
	func eventKey(runeVal int32, direction uint8, code uint16, flags uint32) {
	var modifiers key.Modifiers
	for _, mod := range mods {
	if flags&mod.flags == mod.flags {
	modifiers \|= mod.mod
	}
	}

	theApp.eventsIn <- key.Event{
	Rune: convRune(rune(runeVal)),
	Code: convVirtualKeyCode(code),
	Modifiers: modifiers,
	Direction: key.Direction(direction),
	}
	}

	//export eventFlags
	func eventFlags(flags uint32) {
	for _, mod := range mods {
	if flags&mod.flags == mod.flags && lastFlags&mod.flags != mod.flags {
	eventKey(-1, uint8(key.DirPress), mod.code, flags)
	}
	if lastFlags&mod.flags == mod.flags && flags&mod.flags != mod.flags {
	eventKey(-1, uint8(key.DirRelease), mod.code, flags)
	}
	}
	lastFlags = flags
	}

	var lastFlags uint32

	var mods = [...]struct {
	flags uint32
	code uint16
	mod key.Modifiers
	}{
	// Left and right variants of modifier keys have their own masks,
	// but they are not documented. These were determined empirically.
	{1<<17 \| 0x102, C.kVK_Shift, key.ModShift},
	{1<<17 \| 0x104, C.kVK_RightShift, key.ModShift},
	{1<<18 \| 0x101, C.kVK_Control, key.ModControl},
	// TODO key.ControlRight
	{1<<19 \| 0x120, C.kVK_Option, key.ModAlt},
	{1<<19 \| 0x140, C.kVK_RightOption, key.ModAlt},
	{1<<20 \| 0x108, C.kVK_Command, key.ModMeta},
	{1<<20 \| 0x110, C.kVK_Command, key.ModMeta}, // TODO: missing kVK_RightCommand
	}

	//export lifecycleAlive
	func lifecycleAlive() { theApp.sendLifecycle(lifecycle.StageAlive) }

	//export lifecycleVisible
	func lifecycleVisible() {
	theApp.sendLifecycle(lifecycle.StageVisible)
	}

	//export lifecycleFocused
	func lifecycleFocused() { theApp.sendLifecycle(lifecycle.StageFocused) }

	// convRune marks the Carbon/Cocoa private-range unicode rune representing
	// a non-unicode key event to -1, used for Rune in the key package.
	//
	// http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/CORPCHAR.TXT
	func convRune(r rune) rune {
	if '\uE000' <= r && r <= '\uF8FF' {
	return -1
	}
	return r
	}

	// convVirtualKeyCode converts a Carbon/Cocoa virtual key code number
	// into the standard keycodes used by the key package.
	//
	// To get a sense of the key map, see the diagram on
	//
	// http://boredzo.org/blog/archives/2007-05-22/virtual-key-codes
	func convVirtualKeyCode(vkcode uint16) key.Code {
	switch vkcode {
	case C.kVK_ANSI_A:
	return key.CodeA
	case C.kVK_ANSI_B:
	return key.CodeB
	case C.kVK_ANSI_C:
	return key.CodeC
	case C.kVK_ANSI_D:
	return key.CodeD
	case C.kVK_ANSI_E:
	return key.CodeE
	case C.kVK_ANSI_F:
	return key.CodeF
	case C.kVK_ANSI_G:
	return key.CodeG
	case C.kVK_ANSI_H:
	return key.CodeH
	case C.kVK_ANSI_I:
	return key.CodeI
	case C.kVK_ANSI_J:
	return key.CodeJ
	case C.kVK_ANSI_K:
	return key.CodeK
	case C.kVK_ANSI_L:
	return key.CodeL
	case C.kVK_ANSI_M:
	return key.CodeM
	case C.kVK_ANSI_N:
	return key.CodeN
	case C.kVK_ANSI_O:
	return key.CodeO
	case C.kVK_ANSI_P:
	return key.CodeP
	case C.kVK_ANSI_Q:
	return key.CodeQ
	case C.kVK_ANSI_R:
	return key.CodeR
	case C.kVK_ANSI_S:
	return key.CodeS
	case C.kVK_ANSI_T:
	return key.CodeT
	case C.kVK_ANSI_U:
	return key.CodeU
	case C.kVK_ANSI_V:
	return key.CodeV
	case C.kVK_ANSI_W:
	return key.CodeW
	case C.kVK_ANSI_X:
	return key.CodeX
	case C.kVK_ANSI_Y:
	return key.CodeY
	case C.kVK_ANSI_Z:
	return key.CodeZ
	case C.kVK_ANSI_1:
	return key.Code1
	case C.kVK_ANSI_2:
	return key.Code2
	case C.kVK_ANSI_3:
	return key.Code3
	case C.kVK_ANSI_4:
	return key.Code4
	case C.kVK_ANSI_5:
	return key.Code5
	case C.kVK_ANSI_6:
	return key.Code6
	case C.kVK_ANSI_7:
	return key.Code7
	case C.kVK_ANSI_8:
	return key.Code8
	case C.kVK_ANSI_9:
	return key.Code9
	case C.kVK_ANSI_0:
	return key.Code0
	// TODO: move the rest of these codes to constants in key.go
	// if we are happy with them.
	case C.kVK_Return:
	return key.CodeReturnEnter
	case C.kVK_Escape:
	return key.CodeEscape
	case C.kVK_Delete:
	return key.CodeDeleteBackspace
	case C.kVK_Tab:
	return key.CodeTab
	case C.kVK_Space:
	return key.CodeSpacebar
	case C.kVK_ANSI_Minus:
	return key.CodeHyphenMinus
	case C.kVK_ANSI_Equal:
	return key.CodeEqualSign
	case C.kVK_ANSI_LeftBracket:
	return key.CodeLeftSquareBracket
	case C.kVK_ANSI_RightBracket:
	return key.CodeRightSquareBracket
	case C.kVK_ANSI_Backslash:
	return key.CodeBackslash
	// 50: Keyboard Non-US "#" and ~
	case C.kVK_ANSI_Semicolon:
	return key.CodeSemicolon
	case C.kVK_ANSI_Quote:
	return key.CodeApostrophe
	case C.kVK_ANSI_Grave:
	return key.CodeGraveAccent
	case C.kVK_ANSI_Comma:
	return key.CodeComma
	case C.kVK_ANSI_Period:
	return key.CodeFullStop
	case C.kVK_ANSI_Slash:
	return key.CodeSlash
	case C.kVK_CapsLock:
	return key.CodeCapsLock
	case C.kVK_F1:
	return key.CodeF1
	case C.kVK_F2:
	return key.CodeF2
	case C.kVK_F3:
	return key.CodeF3
	case C.kVK_F4:
	return key.CodeF4
	case C.kVK_F5:
	return key.CodeF5
	case C.kVK_F6:
	return key.CodeF6
	case C.kVK_F7:
	return key.CodeF7
	case C.kVK_F8:
	return key.CodeF8
	case C.kVK_F9:
	return key.CodeF9
	case C.kVK_F10:
	return key.CodeF10
	case C.kVK_F11:
	return key.CodeF11
	case C.kVK_F12:
	return key.CodeF12
	// 70: PrintScreen
	// 71: Scroll Lock
	// 72: Pause
	// 73: Insert
	case C.kVK_Home:
	return key.CodeHome
	case C.kVK_PageUp:
	return key.CodePageUp
	case C.kVK_ForwardDelete:
	return key.CodeDeleteForward
	case C.kVK_End:
	return key.CodeEnd
	case C.kVK_PageDown:
	return key.CodePageDown
	case C.kVK_RightArrow:
	return key.CodeRightArrow
	case C.kVK_LeftArrow:
	return key.CodeLeftArrow
	case C.kVK_DownArrow:
	return key.CodeDownArrow
	case C.kVK_UpArrow:
	return key.CodeUpArrow
	case C.kVK_ANSI_KeypadClear:
	return key.CodeKeypadNumLock
	case C.kVK_ANSI_KeypadDivide:
	return key.CodeKeypadSlash
	case C.kVK_ANSI_KeypadMultiply:
	return key.CodeKeypadAsterisk
	case C.kVK_ANSI_KeypadMinus:
	return key.CodeKeypadHyphenMinus
	case C.kVK_ANSI_KeypadPlus:
	return key.CodeKeypadPlusSign
	case C.kVK_ANSI_KeypadEnter:
	return key.CodeKeypadEnter
	case C.kVK_ANSI_Keypad1:
	return key.CodeKeypad1
	case C.kVK_ANSI_Keypad2:
	return key.CodeKeypad2
	case C.kVK_ANSI_Keypad3:
	return key.CodeKeypad3
	case C.kVK_ANSI_Keypad4:
	return key.CodeKeypad4
	case C.kVK_ANSI_Keypad5:
	return key.CodeKeypad5
	case C.kVK_ANSI_Keypad6:
	return key.CodeKeypad6
	case C.kVK_ANSI_Keypad7:
	return key.CodeKeypad7
	case C.kVK_ANSI_Keypad8:
	return key.CodeKeypad8
	case C.kVK_ANSI_Keypad9:
	return key.CodeKeypad9
	case C.kVK_ANSI_Keypad0:
	return key.CodeKeypad0
	case C.kVK_ANSI_KeypadDecimal:
	return key.CodeKeypadFullStop
	case C.kVK_ANSI_KeypadEquals:
	return key.CodeKeypadEqualSign
	case C.kVK_F13:
	return key.CodeF13
	case C.kVK_F14:
	return key.CodeF14
	case C.kVK_F15:
	return key.CodeF15
	case C.kVK_F16:
	return key.CodeF16
	case C.kVK_F17:
	return key.CodeF17
	case C.kVK_F18:
	return key.CodeF18
	case C.kVK_F19:
	return key.CodeF19
	case C.kVK_F20:
	return key.CodeF20
	// 116: Keyboard Execute
	case C.kVK_Help:
	return key.CodeHelp
	// 118: Keyboard Menu
	// 119: Keyboard Select
	// 120: Keyboard Stop
	// 121: Keyboard Again
	// 122: Keyboard Undo
	// 123: Keyboard Cut
	// 124: Keyboard Copy
	// 125: Keyboard Paste
	// 126: Keyboard Find
	case C.kVK_Mute:
	return key.CodeMute
	case C.kVK_VolumeUp:
	return key.CodeVolumeUp
	case C.kVK_VolumeDown:
	return key.CodeVolumeDown
	// 130: Keyboard Locking Caps Lock
	// 131: Keyboard Locking Num Lock
	// 132: Keyboard Locking Scroll Lock
	// 133: Keyboard Comma
	// 134: Keyboard Equal Sign
	// ...: Bunch of stuff
	case C.kVK_Control:
	return key.CodeLeftControl
	case C.kVK_Shift:
	return key.CodeLeftShift
	case C.kVK_Option:
	return key.CodeLeftAlt
	case C.kVK_Command:
	return key.CodeLeftGUI
	case C.kVK_RightControl:
	return key.CodeRightControl
	case C.kVK_RightShift:
	return key.CodeRightShift
	case C.kVK_RightOption:
	return key.CodeRightAlt
	// TODO key.CodeRightGUI
	default:
	return key.CodeUnknown
	}
	}