[Question] LIM: Wayland?

[chippmann]

Is the lim branch also compatible with wayland?

[Zren]

No. There's a few #ifdef HAVE_X11 that I've commented out to simplify porting appmenu from plasma-workspace.

• https://github.com/Zren/material-decoration/blob/lim/src/AppMenuModel.cc#L28
• https://github.com/KDE/plasma-workspace/tree/master/appmenu
• https://github.com/psifidotos/applet-window-appmenu/blob/master/plugin/appmenumodel.cpp

[chippmann]

Ah bummer. Anyway thanks a lot for your work! I keep watching. How big of a task do you think will the wayland support be (i might have a look into it once i have a bit more time)

[Zren]

If the widget works in walyand, then it should be possible.

The hard part is testing it, as while you can restart plasmashell easily in wayland, you can't really easily test kwin_wayland as killing it will restart your session.

[baduhai]

As of earlier today, when Plasma 5.19 was released, the Global Menu works under Wayland. From my testing, LIM does not work as it currently is under Wayland, but perhaps due to the advancements it could with a bit of tweaking? The global menu is currently the only thing keeping me on X11, so it'd be awesome to be able to migrate.

[trmdi]

FWIW, applet-window-appmenu has added wayland support recently.

[Zren]

I'd noticed the LibTaskManager changes in Plasma 5.19, but wasn't entirely sure how to link it.

Relevant changes:

• https://github.com/psifidotos/applet-window-appmenu/compare/1b54d13c23cb4964566aa0510aca9a29aa1af96f...master

---

• https://github.com/psifidotos/applet-window-appmenu/commit/83e19b38cf952241c3994234348f53504febfd80
• https://github.com/psifidotos/applet-window-appmenu/commit/1b08fc22e8d8d73a07e4c0ad6405f9db8c4560df

---

• https://github.com/psifidotos/applet-window-appmenu/commit/2799bfd7aad973f599f66532f31b8f27e478b89e
• https://github.com/psifidotos/applet-window-appmenu/commit/63f820ee571576e2f51f1e3df7dee60c70d7fda8
• https://github.com/psifidotos/applet-window-appmenu/commit/72d5b3f8f3e8d8793796b27563ea6937be0f2f5b
• https://github.com/psifidotos/applet-window-appmenu/commit/01f66220967b21b78b6c7cac21b2ed0ccf623fb5
• https://github.com/psifidotos/applet-window-appmenu/commit/6857f034e7a98635e1c92e708b2ce6d0d5257bff

---

• https://github.com/psifidotos/applet-window-appmenu/blame/master/lib/appmenuapplet.cpp
• https://github.com/psifidotos/applet-window-appmenu/blame/master/plugin/appmenumodel.cpp
• https://github.com/psifidotos/applet-window-appmenu/blame/master/plugin/wm/abstractwindowmanager.cpp
• https://github.com/psifidotos/applet-window-appmenu/blame/master/plugin/wm/x11fallbackwindowmanager.cpp
• https://github.com/psifidotos/applet-window-appmenu/blame/master/plugin/wm/waylandwindowmanager.cpp

[Zren]

Here's the commit for how the Global Menu widget implemented LibTaskManager.

• https://github.com/kde/plasma-workspace/commit/d8d079e42e62e2133477470c1d6b7c4559bcee55

I found I could link with PW::LibTaskManager or taskmanager as it's aliased using add_library(PW::LibTaskManager ALIAS taskmanager). I needed to use #include <taskmanager/tasksmodel.h> to import the TasksModel class. I could only find /usr/include/taskmanager/tasksmodel.h.

• https://github.com/KDE/plasma-workspace/tree/master/libtaskmanager
• https://github.com/KDE/plasma-workspace/blob/master/libtaskmanager/CMakeLists.txt#L32
• locate tasksmodel.h | grep /usr/

Annoyingly, I need to link against Qt5::Quick as TasksModel imports QQmlParserStatus.

The Global Menu widget only calls m_tasksModel->activeTask(), it doesn't need a way to set windowId like LIM needs.

• https://github.com/kde/plasma-workspace/commit/d8d079e42e62e2133477470c1d6b7c4559bcee55#diff-d51bd2cf6262943da13d8d4e441ebfd8R142

[Zren]

All I really need is to connect to the wayland server, find the PlasmaWindow instance, then get it's applicationMenuServiceName() and applicationMenuObjectPath().

• https://github.com/KDE/plasma-workspace/blob/master/libtaskmanager/waylandtasksmodel.cpp#L122
• https://github.com/KDE/kwayland/blob/master/src/client/plasmawindowmanagement.h#L247

PlasmaWindow::uuid() was added in the most recent KF5 v5.73.

psifidotos' appmenu widget has a nice WaylandWindowManager::windowFor(QVariant wid) I can use. It checks if PlasmaWindow::isValid() && PlasmaWindow::internalId() == wid.toUInt(). Unfortunately, internalId() is deprecated in the latest KF5 v5.73.

• https://github.com/psifidotos/applet-window-appmenu/compare/1b54d13c23cb4964566aa0510aca9a29aa1af96f...master#diff-91738585b755500885894ad0c046669dR104

[baduhai]

Seems like the replacement for internalId() is uuid(), which doesn't seem so hard to adapt.

[Zren]

Note: I haven't actually gotten wayland working, I'm just poking at KDecoration code.

For some reason, wayland menus show up with a titlebar. Even the standard ApplicationMenu icon button from Breeze.

Oddly, the AppIcon button menu displays properly.

• decoration->requestShowWindowMenu https://invent.kde.org/plasma/kdecoration/-/blob/master/src/decorationbutton.cpp#L58-62
• DecoratedClientImpl::requestShowWindowMenu https://invent.kde.org/plasma/kwin/-/blob/master/src/decorations/decoratedclient.cpp#L229
• Workspace::showWindowMenu https://invent.kde.org/plasma/kwin/-/blob/master/src/useractions.cpp#L1539
• UserActionsMenu::show() https://invent.kde.org/plasma/kwin/-/blob/master/src/useractions.cpp#L117
• UserActionsMenu::init() https://invent.kde.org/plasma/kwin/-/blob/master/src/useractions.cpp#L217

m_menu = new QMenu;
connect(m_menu, &QMenu::aboutToShow, this, &UserActionsMenu::menuAboutToShow);
connect(m_menu, &QMenu::triggered, this, &UserActionsMenu::slotWindowOperation, Qt::QueuedConnection);

QMenu *advancedMenu = new QMenu(m_menu);
connect(advancedMenu, &QMenu::aboutToShow, [this, advancedMenu]() {
    if (m_client) {
        advancedMenu->setPalette(m_client->palette());
    }
});

The ApplicationMenu has a similar call:

• Workspace::showApplicationMenu https://invent.kde.org/plasma/kwin/-/blob/master/src/useractions.cpp#L1544
• ApplicationMenu::showApplicationMenu https://invent.kde.org/plasma/kwin/-/blob/master/src/appmenu.cpp#L103
• Related code: https://invent.kde.org/plasma/kwin/-/commit/93938d60b84df81733da7b3f697332fc76fe085b2

[baduhai]

5.22 fixed a lot of issues with the global menu on wayland, perhaps there could be some progress now?

That search feature is sweet, and with LIM, it'd be the ultimate setup.

[Vistaus]

I've recently switched to Wayland and this feature would be so, so sweet to have! 🙂

[Vistaus]

@Zren Have you had time to look at this yet?

[amorozov]

Hello! Maybe some help is needed?

[flukejones]

Actually came here just to ping like the folks above. Recently shifted from Gnome to KDE and the absolute waste of space that is a titlebar is doing my head in.

I'm unlikely to find time to help unfortunately.

[flukejones]

Also came across this - https://invent.kde.org/plasma/breeze/-/merge_requests/126, is it the same code as this?

[amorozov]

Well, as the annotation says, it's based on the material decoration code. Likely its code slightly differs from the original one. Also it doesn't support the continuation button yet.

[guiodic]

By the end of the year we will move to Plasma 6 which will have Wayland by default. It would be nice to have the LIM ported to Plasma 6 and if possible to Wayland.