Global hotkeys do not work in Wayland + Plasma 6 environment

[UM-Li]

描述 bug

调出主窗口的热键设为 Ctrl+F12，翻译剪贴板单词的热键设为 Ctrl+C Ctrl+C。
这两个热键在 KDE Plasma 6 + Wayland 环境下均失效，按下没有反应。

系统和软件版本

系统为 Arch Linux，Plasma 版本 v6.0.1。

Goldendict-ng 24.02.16.8f77f2a7 at 2024-03-01T05:32:34
Qt 6.6.2 GCC 13.2.1 20230801 arch linux 6.7.8-arch1-1 x86_64-little_endian-lp64
Flags:USE_XAPIAN MAKE_ZIM_SUPPORT USE_ICONV MAKE_CHINESE_CONVERSION_SUPPORT

[github-actions]

Bot detected the issue body's language is not English, translate it automatically.

Describe bug

The hotkey to bring up the main window is set to Ctrl+F12, and the hotkey to translate clipboard words is set to Ctrl+C Ctrl+C.
These two hotkeys are invalid in the KDE Plasma 6 + Wayland environment, and there is no response when pressed.

System and Software Version

The system is Arch Linux, Plasma version v6.0.1.

Goldendict-ng 24.02.16.8f77f2a7 at 2024-03-01T05:32:34
Qt 6.6.2 GCC 13.2.1 20230801 arch linux 6.7.8-arch1-1 x86_64-little_endian-lp64
Flags:USE_XAPIAN MAKE_ZIM_SUPPORT USE_ICONV MAKE_CHINESE_CONVERSION_SUPPORT

[UM-Li]

再做测试发现这两个热键只在 GD 主窗口打开且获得焦点时可用，即按 Ctrl+F12 可以关闭主窗口但不能在其已经关闭时调出；Ctrl+C Ctrl+C 只能用于复制查询 GD 主窗口里的单词。

[github-actions]

Bot detected the issue body's language is not English, translate it automatically.

After further testing, I found that these two hotkeys are only available when the GD main window is open and has focus. That is, pressing Ctrl+F12 can close the main window but cannot be called out when it has been closed; Ctrl+C Ctrl+ C can only be used to copy words in the main window of the query GD.

[shenlebantongying]

Sadly, there are various tasks to make GD works natively on Wayland without bugs.

At the same time, XWayland is getting more restrictive than before. This is probably intended. XWayland can no longer monitor and intercept global shortcuts. Also, If a window is not focused, there will be no clipboard change event anymore.

Although we call it "broken", I guess desktop environment developers like KDE call it "Wayland properly implemented" :)

---

Anyway, a temporal workaround is enabling global shortcut at KDE level:

Bind a script that reads from clipboard and pass it to Goldendict.

Then you can use, for example, Ctrl+C,Meta+C

[shenlebantongying]

wl-paste appears to support primary selection clipboard.

You can also bind goldendict $(wl-paste --primary) to a single shortcut, like Meta+C to select and open translate selection in GD.

[UM-Li]

Thank you for the tips @shenlebantongying, for now the KDE shortcut works well.
It's a bit of a shame things have become this restrictive under Wayland :-(

[CoelacanthusHex]

The right way is register GlobalShortcuts use https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.GlobalShortcuts.html

[shenlebantongying]

Here is my insanely bad and awful code to test org.freedesktop.portal.GlobalShortcuts:

https://github.com/SourceReviver/qt_wayland_globalshortcut_via_portal

It will register shortcuts and response to them when triggered on KDE/Wayland.

A better implementation can be found https://invent.kde.org/libraries/xdg-portal-test-kde

I am still not sure about how to handle errors, app shutdown...

---

So far,

• No known/popular app utilizes org.freedesktop.portal.GlobalShortcuts
• Only KDE & Hyprland implemented it, and I found 2 problems
  • https://bugs.kde.org/show_bug.cgi?id=483639
  • https://bugs.kde.org/show_bug.cgi?id=483640

[dc-me]

It also does not work in fedora 40(Gnome Desktop) with flatpak version.