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exposay: don't crash if a view goes away

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When a view was destroyed while we were on exposay, we didn't
remove it from the list of views, and so when leaving exposay
we were trying to animate (and sometimes activate) a
non-existent view, causing a crash.

Signed-off-by: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
This commit is contained in:
Emilio Pozuelo Monfort 2014-02-10 14:23:04 +01:00 committed by Kristian Høgsberg
parent 3b6e68e2c1
commit f942b73a1c
1 changed files with 29 additions and 2 deletions
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31
desktop-shell/exposay.c
View File

@ -33,6 +33,7 @@ struct exposay_surface {
struct exposay_output *eoutput;
struct weston_surface *surface;
struct weston_view *view;
struct wl_listener view_destroy_listener;
struct wl_list link;
int x;
@ -56,6 +57,20 @@ static void exposay_set_state(struct desktop_shell *shell,
struct weston_seat *seat);
static void exposay_check_state(struct desktop_shell *shell);
static void
exposay_surface_destroy(struct exposay_surface *esurface)
{
wl_list_remove(&esurface->link);
wl_list_remove(&esurface->view_destroy_listener.link);
if (esurface->shell->exposay.focus_current == esurface->view)
esurface->shell->exposay.focus_current = NULL;
if (esurface->shell->exposay.focus_prev == esurface->view)
esurface->shell->exposay.focus_prev = NULL;
free(esurface);
}
static void
exposay_in_flight_inc(struct desktop_shell *shell)
{
@ -110,8 +125,7 @@ exposay_animate_out_done(struct weston_view_animation *animation, void *data)
struct exposay_surface *esurface = data;
struct desktop_shell *shell = esurface->shell;
wl_list_remove(&esurface->link);
free(esurface);
exposay_surface_destroy(esurface);
exposay_in_flight_dec(shell);
}
@ -176,6 +190,16 @@ exposay_pick(struct desktop_shell *shell, int x, int y)
}
}
static void
handle_view_destroy(struct wl_listener *listener, void *data)
{
struct exposay_surface *esurface = container_of(listener,
struct exposay_surface,
view_destroy_listener);
exposay_surface_destroy(esurface);
}
/* Pretty lame layout for now; just tries to make a square. Should take
* aspect ratio into account really. Also needs to be notified of surface
* addition and removal and adjust layout/animate accordingly. */
@ -267,6 +291,9 @@ exposay_layout(struct desktop_shell *shell, struct shell_output *shell_output)
esurface->eoutput = eoutput;
esurface->view = view;
esurface->view_destroy_listener.notify = handle_view_destroy;
wl_signal_add(&view->destroy_signal, &esurface->view_destroy_listener);
esurface->row = i / eoutput->grid_size;
esurface->column = i % eoutput->grid_size;