init commit

hotkey_windows.go

@@ -0,0 +1,61 @@
+//go:build windows
+
+package main
+
+import (
+	goruntime "runtime"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+const (
+	wmHotkey = 0x0312
+	modWin   = 0x0008
+	modAlt   = 0x0001
+	vkV      = 0x56
+	hotkeyID = 1
+)
+
+var (
+	user32             = windows.NewLazySystemDLL("user32.dll")
+	procRegisterHotKey = user32.NewProc("RegisterHotKey")
+	procGetMessage     = user32.NewProc("GetMessageW")
+	procTranslateMsg   = user32.NewProc("TranslateMessage")
+	procDispatchMsg    = user32.NewProc("DispatchMessageW")
+)
+
+type winMSG struct {
+	HWND    uintptr
+	Message uint32
+	WParam  uintptr
+	LParam  uintptr
+	Time    uint32
+	PtX     int32
+	PtY     int32
+}
+
+func (a *App) registerHotkey() {
+	go func() {
+		goruntime.LockOSThread()
+		defer goruntime.UnlockOSThread()
+
+		r, _, _ := procRegisterHotKey.Call(0, hotkeyID, modWin|modAlt, vkV)
+		if r == 0 {
+			return
+		}
+
+		var msg winMSG
+		for {
+			r, _, _ := procGetMessage.Call(uintptr(unsafe.Pointer(&msg)), 0, 0, 0)
+			if r == 0 || r == ^uintptr(0) {
+				break
+			}
+			if msg.Message == wmHotkey && msg.WParam == hotkeyID {
+				a.toggleVPN()
+			}
+			procTranslateMsg.Call(uintptr(unsafe.Pointer(&msg)))
+			procDispatchMsg.Call(uintptr(unsafe.Pointer(&msg)))
+		}
+	}()
+}