[PATCH v2] xdg-shell: add preferred min/max size requests

[Jonas Ådahl]

Hi,

If we want this in an initial minimalistic xdg_shell version, this needs
to be targetted at xdg_shell unstable v6, which currently lives on a
branch and as set of proposed patches. We cannot add this to version 5
anyhow.

If we indeed want this in the core protocol now, and not in some
extension, then I'd suggest rebasing it on top of "xdg-shell: Turn
xdg_surface into a generic base interface" [0] and adding this request
to the xdg_toplevel interface.

I'm in the process of sending a updated version of that series, but in
general, up to that patch, it should be more or less the same.


Jonas

[0] https://patchwork.freedesktop.org/patch/72427/

On Tue, Apr 05, 2016 at 11:36:16AM +0200, Olivier Fourdan wrote:
> Some application may wish to restrict their window in size, but
> xdg-shell has no mechanism for the client to advertise such a maximum
> or minimum size the compositor can use.
> 
> As a result, the compositor may try to maximize or fullscreen a window
> while the client would not allow for the requested size.
> 
> Add new requests "set_preferred_max_size" and "set_preferred_min_size"
> to xdg-shell so that the client can tell the compositor which would be
> its preferred smallest/largest acceptable size, so that he compositor
> can decide if maximize or fullscreen makes sense, draw an accurate
> animation, etc.
> 
> Signed-off-by: Olivier Fourdan <ofourdan at redhat.com>
> Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=764413
> ---
>  v2: Rename the request to "set_preferred_max_size",
>      add "set_preferred_min_size" as well
> 
>  unstable/xdg-shell/xdg-shell-unstable-v5.xml | 46 ++++++++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
> 
> diff --git a/unstable/xdg-shell/xdg-shell-unstable-v5.xml b/unstable/xdg-shell/xdg-shell-unstable-v5.xml
> index 542491f..9c9b4d2 100644
> --- a/unstable/xdg-shell/xdg-shell-unstable-v5.xml
> +++ b/unstable/xdg-shell/xdg-shell-unstable-v5.xml
> @@ -462,6 +462,52 @@
>        <arg name="height" type="int"/>
>      </request>
>  
> +    <request name="set_preferred_max_size">
> +      <description summary="set the preferred maximum size">
> +        Set a preferred maximum size for the surface.
> +
> +        The client can specify a maximum width and/or height to tell the
> +        compositor what would be the preferred largest size for a surface.
> +
> +        The compositor may use this information from the client to allow
> +        or disallow different states like maximixe or fullscreen and
> +        draw accurate animations.
> +        Similarily, a tiling window manager can use this information to
> +        place and resize client windows in a more effective layout.
> +
> +        If never set, the size of the surface is not limited by the client.
> +
> +        A value of zero for either width, height or both means that the
> +        client has no preference regarding the maximum size in the given
> +        dimension.
> +      </description>
> +      <arg name="width" type="int"/>
> +      <arg name="height" type="int"/>
> +    </request>
> +
> +    <request name="set_preferred_min_size">
> +      <description summary="set the preferred minimum size">
> +        Set a preferred minimum size for the surface.
> +
> +        The client can specify a minimum width and/or height to tell the
> +        compositor what would be the preferable smallest size of a surface.
> +
> +        The compositor may use this information from the client to allow
> +        or disallow different states like maximixe or fullscreen and
> +        draw accurate animations.
> +        Similarily, a tiling window manager can use this information to
> +        place and resize client windows in a more effective layout.
> +
> +        If never set, the size of the surface is not limited by the client.
> +
> +        A value of zero for either width, height or both means that the
> +        client has no preference regarding the minimum size in the given
> +        dimension.
> +      </description>
> +      <arg name="width" type="int"/>
> +      <arg name="height" type="int"/>
> +    </request>
> +
>      <request name="set_maximized">
>        <description summary="maximize the window">
>          Maximize the surface.
> -- 
> 2.5.5
> 
> _______________________________________________
> wayland-devel mailing list
> wayland-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/wayland-devel