richard
75c113909d
- Adds fyne.io/systray with a programmatic monkey face icon and Quit menu item - Logs to discord-lobby-mute.log next to the exe so startup errors are visible without a console window - Windows now uses raw Win32 RegisterHotKey in a locked goroutine instead of golang.design/x/hotkey, avoiding a deadlock where systray and the hotkey library both try to own the main thread message loop - Build with: GOOS=windows GOARCH=amd64 go build -ldflags "-H windowsgui" -o discord-lobby-mute.exe . Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
89 lines
1.7 KiB
Go
89 lines
1.7 KiB
Go
//go:build windows
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package main
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import (
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"fmt"
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"runtime"
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"syscall"
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"unsafe"
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"golang.design/x/hotkey"
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)
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var modMap = map[string]hotkey.Modifier{
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"ctrl": hotkey.ModCtrl,
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"shift": hotkey.ModShift,
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"alt": hotkey.ModAlt,
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"win": hotkey.ModWin,
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"super": hotkey.ModWin,
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}
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var (
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user32 = syscall.NewLazyDLL("user32.dll")
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procRegisterHotKey = user32.NewProc("RegisterHotKey")
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procGetMessageW = user32.NewProc("GetMessageW")
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)
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// winMsg mirrors the Win32 MSG struct.
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type winMsg struct {
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hwnd uintptr
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message uint32
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wParam uintptr
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lParam uintptr
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time uint32
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ptX int32
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ptY int32
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}
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func startHotkey(keybind string) (<-chan struct{}, error) {
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mods, key, err := parseKeybind(keybind)
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if err != nil {
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return nil, err
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}
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// hotkey.Modifier and hotkey.Key values on Windows are the native Win32
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// MOD_* and VK_* constants, so they can be passed directly to RegisterHotKey.
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var modFlags uintptr
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for _, m := range mods {
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modFlags |= uintptr(m)
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}
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vk := uintptr(key)
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ch := make(chan struct{}, 1)
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ready := make(chan error, 1)
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go func() {
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runtime.LockOSThread()
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// Intentionally no defer UnlockOSThread — this goroutine owns its OS
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// thread for the lifetime of the app to keep the hotkey message queue alive.
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ret, _, e := procRegisterHotKey.Call(0, 1, modFlags, vk)
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if ret == 0 {
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ready <- fmt.Errorf("RegisterHotKey: %w", e)
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return
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}
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close(ready)
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const wmHotkey = 0x0312
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var msg winMsg
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for {
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r, _, _ := procGetMessageW.Call(
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uintptr(unsafe.Pointer(&msg)), 0, wmHotkey, wmHotkey,
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)
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if r == 0 || r == ^uintptr(0) { // WM_QUIT or error
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return
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}
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select {
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case ch <- struct{}{}:
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default:
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}
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}
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}()
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if err := <-ready; err != nil {
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return nil, err
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}
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return ch, nil
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}
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