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LGUG2Z
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komorebi's workspaces exist on Windows and macOS because neither has a virtual desktop API: switching hides every window of the workspace being left. KWin has virtual desktops, per output since 6.8, so here workspace i is KWin's desktop i on every monitor, and each monitor shows one. KWin shows, hides and focuses the windows of a desktop; komorebi asks for a switch, puts a window on a desktop, and follows what anything else does. The Backend gets the workspace methods (ensure_workspaces, switch_workspace, set_window_workspace, window_workspace, current_workspaces), and the fake its desktops. The bridge reports the desktops, the desktop each output shows and a window's desktops, and carries out output_desktop and desktop commands, typed and tested with the fixtures like the rest. The table turns a switch or a move komorebi did not make into a WorkspaceChange or a WorkspaceMove, and records its own when it sends them, so that KWin's report of those raises nothing. The window manager follows a switch with no command in reply (adopt_workspace_change), puts windows on their desktops before a desktop is shown (focusing a window first would take the monitor back), and loads the windows open at startup onto the workspace of their desktop. Per-output desktops are a kwinrc setting that is off by default, and kwriteconfig6 was not on the PATH of the user service in a live session, so komorebi edits kwinrc itself (kwin::kwinrc) and puts the user's value back when it stops, also after a crash. focus-workspace, move-to-workspace and send-to-workspace come with this commit, since the tests of switching and moving, and vm-workspace-switch, need them; the named and cycling workspace commands follow. vm-workspace-switch runs the daemon against a real KWin; vm-kwin-contract checks what komorebi relies on from KWin's per-output desktops, on a headless KWin with two outputs and no komorebi.