[PATCH v2 2/3] ui: Switch "-display sdl" to use the QAPI parser

[Markus Armbruster]

Thomas Huth <thuth at redhat.com> writes:

> The "-display sdl" option still uses a hand-crafted parser for its
> parameters since we didn't want to drag an interface we considered
> somewhat flawed into the QAPI schema. Since the flaws are gone now,
> it's time to QAPIfy.
>
> This introduces the new "DisplaySDL" QAPI struct that is used to hold
> the parameters that are unique to the SDL display. The only specific
> parameter is currently "grab-mod" that is used to specify the required
> modifier keys to escape from the mouse grabbing mode.
>
> Signed-off-by: Thomas Huth <thuth at redhat.com>
> ---
>  qapi/ui.json            | 27 +++++++++++++++-
>  include/sysemu/sysemu.h |  2 --
>  softmmu/globals.c       |  2 --
>  softmmu/vl.c            | 70 +----------------------------------------
>  ui/sdl2.c               | 10 ++++++
>  5 files changed, 37 insertions(+), 74 deletions(-)
>
> diff --git a/qapi/ui.json b/qapi/ui.json
> index 11a827d10f..a244e26e0f 100644
> --- a/qapi/ui.json
> +++ b/qapi/ui.json
> @@ -1295,6 +1295,30 @@
>        '*swap-opt-cmd': 'bool'
>    } }
>  
> +##
> +# @GrabMod:
> +#
> +# Set of modifier keys that need to be hold for shortcut key actions.
> +#
> +# Since: 7.1
> +##
> +{ 'enum'  : 'GrabMod',
> +  'data'  : [ 'lctrl-lalt', 'lshift-lctrl-lalt', 'rctrl' ] }

This is fine now.  If we ever generalize to "arbitrary set of modifier
keys", it'll become somewhat awkward.  No objection from me.

> +
> +##
> +# @DisplaySDL:
> +#
> +# SDL2 display options.
> +#
> +# @grab-mod:  String with modifier keys that should be pressed together with

s/String with modifier keys/Modifier keys/

> +#             the "G" key to release the mouse grab. Only "lshift-lctrl-lalt"
> +#             and "rctrl" are currently supported.

Why do we define lctrl-lalt if it's not supported?

> +#
> +# Since: 7.1
> +##
> +{ 'struct'  : 'DisplaySDL',
> +  'data'    : { '*grab-mod'   : 'GrabMod' } }
> +
>  ##
>  # @DisplayType:
>  #
> @@ -1374,7 +1398,8 @@
>        'curses': { 'type': 'DisplayCurses', 'if': 'CONFIG_CURSES' },
>        'egl-headless': { 'type': 'DisplayEGLHeadless',
>                          'if': { 'all': ['CONFIG_OPENGL', 'CONFIG_GBM'] } },
> -      'dbus': { 'type': 'DisplayDBus', 'if': 'CONFIG_DBUS_DISPLAY' }
> +      'dbus': { 'type': 'DisplayDBus', 'if': 'CONFIG_DBUS_DISPLAY' },
> +      'sdl': { 'type': 'DisplaySDL', 'if': 'CONFIG_SDL' }
>    }
>  }

[...]