Commit 46d921be authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

input-linux: add option to toggle grab on all devices 



Maintain a list of all input devices.  Add an option to make grab
work across all devices (so toggling grab on the keybard can switch
over the mouse too).

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Message-id: 1457087116-4379-3-git-send-email-kraxel@redhat.com
parent e0d2bd51

ui/input-linux.c

+29 −0
Original line number Diff line number Diff line
@@ -134,14 +134,19 @@ struct InputLinux { 
    int         fd;

    bool        grab_request;

    bool        grab_active;

    bool        grab_all;

    bool        keydown[KEY_CNT];

    int         keycount;

    int         wheel;

    QTAILQ_ENTRY(InputLinux) next;

};



static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs);



static void input_linux_toggle_grab(InputLinux *il)

{

    intptr_t request = !il->grab_active;

    InputLinux *item;

    int rc;



    rc = ioctl(il->fd, EVIOCGRAB, request);
@@ -149,6 +154,19 @@ static void input_linux_toggle_grab(InputLinux *il) 
        return;

    }

    il->grab_active = !il->grab_active;



    if (!il->grab_all) {

        return;

    }

    QTAILQ_FOREACH(item, &inputs, next) {

        if (item == il || item->grab_all) {

            /* avoid endless loops */

            continue;

        }

        if (item->grab_active != il->grab_active) {

            input_linux_toggle_grab(item);

        }

    }

}



static void input_linux_event_keyboard(void *opaque)
@@ -238,6 +256,11 @@ static void input_linux_event_mouse(void *opaque) 
            break;

        }



        /* only send event to guest when grab is active */

        if (!il->grab_active) {

            continue;

        }



        switch (event.type) {

        case EV_KEY:

            switch (event.code) {
@@ -292,6 +315,8 @@ int input_linux_init(void *opaque, QemuOpts *opts, Error **errp) 
    int rc, ver;



    il->evdev = qemu_opt_get(opts, "evdev");

    il->grab_all = qemu_opt_get_bool(opts, "grab-all", false);



    if (!il->evdev) {

        error_setg(errp, "no input device specified");

        goto err_free;
@@ -328,6 +353,7 @@ int input_linux_init(void *opaque, QemuOpts *opts, Error **errp) 
        goto err_close;

    }

    input_linux_toggle_grab(il);

    QTAILQ_INSERT_TAIL(&inputs, il, next);

    return 0;



err_close:
@@ -345,6 +371,9 @@ static QemuOptsList qemu_input_linux_opts = { 
        {

            .name = "evdev",

            .type = QEMU_OPT_STRING,

        },{

            .name = "grab-all",

            .type = QEMU_OPT_BOOL,

        },

        { /* end of list */ }

    },