[PATCH v3] xdg-shell: use case to change the app ID at runtime

[Jonas Ådahl]

On Mon, Jul 15, 2019 at 04:20:10PM +0200, glogow at fbihome.de wrote:
> From: Jan-Marek Glogowski <glogow at fbihome.de>
> 
> LibreOffice is one big binary with explicit brandings for different
> application modules. This is represented in X11 by a different
> WM_CLASS setting for a window. The WM_CLASS is changed based on the
> loaded document at runtime. As a result LibreOffice already offers
> multiple desktop files with different icons, StartupWMClass
> entries and application names.
> 
> This amendment of the set_app_id request just explicitly specifies
> the use case to change a surfaces' app ID at runtime, so a compositor
> implementor is made aware of it. Just as the WM_CLASS, a change of
> the app ID should result in an update of the propertes of a surface
> depending on the app ID, like the window icon specified in the
> desktop file or a re-grouping of the surfaces in a task manager.

Reviewed-by: Jonas Ådahl <jadahl at gmail.com>


Jonas

> ---
>  stable/xdg-shell/xdg-shell.xml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/stable/xdg-shell/xdg-shell.xml b/stable/xdg-shell/xdg-shell.xml
> index 2e420c6..3a87a9e 100644
> --- a/stable/xdg-shell/xdg-shell.xml
> +++ b/stable/xdg-shell/xdg-shell.xml
> @@ -604,6 +604,9 @@
>  	For example, "org.freedesktop.FooViewer" where the .desktop file is
>  	"org.freedesktop.FooViewer.desktop".
>  
> +	Like other properties, a set_app_id request can be sent after the
> +	xdg_toplevel has been mapped to update the property.
> +
>  	See the desktop-entry specification [0] for more details on
>  	application identifiers and how they relate to well-known D-Bus
>  	names and .desktop files.
> -- 
> 2.20.1
>