Re: [PATCH] ui: Remove deprecated parameters of -display sdl and switch to QAPI parser

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On Wed, May 11, 2022 at 02:17:25PM +0200, Thomas Huth wrote:
> The "-display sdl" option still used a hand-crafted parser for its
> parameters since some of them used underscores which is forbidden
> in QAPI. Now that they've been deprecated and the deprecation period
> is over, we can remove the problematic parameters and switch to use
> the QAPI parser instead.

I'd say the removal of deprecated bits ought to be separate
from the addition of new QAPI bits.


> diff --git a/qapi/ui.json b/qapi/ui.json
> index 059302a5ef..7d5097808a 100644
> --- a/qapi/ui.json
> +++ b/qapi/ui.json
> @@ -1309,6 +1309,19 @@
>        '*swap-opt-cmd': 'bool'
>    } }
>  
> +##
> +# @DisplaySDL:
> +#
> +# SDL2 display options.
> +#
> +# @grab-mod:  Modifier keys that should be pressed together
> +#             with "G" to release the mouse grab.
> +#
> +# Since: 7.1
> +##
> +{ 'struct'  : 'DisplaySDL',
> +  'data'    : { '*grab-mod'   : 'str' } }

So any arbitrary string here, but...

> diff --git a/ui/sdl2.c b/ui/sdl2.c
> index d3741f9b75..18c63e1fc9 100644
> --- a/ui/sdl2.c
> +++ b/ui/sdl2.c
> @@ -40,6 +40,8 @@ static struct sdl2_console *sdl2_console;
>  
>  static SDL_Surface *guest_sprite_surface;
>  static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
> +static bool alt_grab;
> +static bool ctrl_grab;
>  
>  static int gui_saved_grab;
>  static int gui_fullscreen;
> @@ -853,6 +855,17 @@ static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
>  
>      gui_fullscreen = o->has_full_screen && o->full_screen;
>  
> +    if (o->u.sdl.has_grab_mod) {
> +        if (g_str_equal(o->u.sdl.grab_mod, "lshift-lctrl-lalt")) {
> +            alt_grab = true;
> +        } else if (g_str_equal(o->u.sdl.grab_mod, "rctrl")) {
> +            ctrl_grab = true;
> +        } else {
> +            error_report("Unsupported grab-mod: %s", o->u.sdl.grab_mod);
> +            exit(1);
> +        }
> +    }

We're treating this more like an enum here. It does leave the door
open for adding a generic parsing of arbitrary grab mods later
I guess


With regards,
Daniel
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