compositor: add destructors to shell plugins

Add a new wlsc_shell API function for destroying the shell plugin
object. Helps to reduce Valgrind reports.

Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>

compositor/compositor.c

@@ -2172,6 +2172,8 @@ int main(int argc, char *argv[])
 	if (xserver)
 		wlsc_xserver_destroy(ec);
 
+	ec->shell->destroy(ec->shell);
+
 	if (ec->has_bind_display)
 		ec->unbind_display(ec->display, display);
 

compositor/compositor.h

@@ -161,6 +161,7 @@ struct wlsc_shell {
 	void (*configure)(struct wlsc_shell *shell,
 			  struct wlsc_surface *surface,
 			  int32_t x, int32_t y, int32_t width, int32_t height);
+	void (*destroy)(struct wlsc_shell *shell);
 };
 
 enum {

compositor/shell.c

@@ -58,7 +58,7 @@ struct wl_shell {
 	struct wl_list panels;
 
 	struct {
-		const char *path;
+		char *path;
 		int duration;
 		struct wl_resource *binding;
 		struct wl_list surfaces;
@@ -123,7 +123,6 @@ shell_configuration(struct wl_shell *shell)
 	shell->screensaver.duration = duration;
 
 	return ret;
-	/* FIXME: free(shell->screensaver.path) on plugin fini */
 }
 
 static void
@@ -1234,6 +1233,15 @@ bind_screensaver(struct wl_client *client,
 	wl_resource_destroy(resource, 0);
 }
 
+static void
+shell_destroy(struct wlsc_shell *base)
+{
+	struct wl_shell *shell = container_of(base, struct wl_shell, shell);
+
+	free(shell->screensaver.path);
+	free(shell);
+}
+
 int
 shell_init(struct wlsc_compositor *ec);
 
@@ -1252,6 +1260,7 @@ shell_init(struct wlsc_compositor *ec)
 	shell->shell.unlock = unlock;
 	shell->shell.map = map;
 	shell->shell.configure = configure;
+	shell->shell.destroy = shell_destroy;
 
 	wl_list_init(&shell->hidden_surface_list);
 	wl_list_init(&shell->backgrounds);

compositor/tablet-shell.c

@@ -511,6 +511,16 @@ bind_shell(struct wl_client *client, void *data, uint32_t version, uint32_t id)
 	wl_client_add_resource(client, &shell->resource);
 }
 
+static void
+tablet_shell_destroy(struct wlsc_shell *base)
+{
+	struct tablet_shell *shell =
+		container_of(base, struct tablet_shell, shell);
+
+	wl_event_source_remove(shell->long_press_source);
+	free(shell);
+}
+
 void
 shell_init(struct wlsc_compositor *compositor);
 
@@ -552,6 +562,7 @@ shell_init(struct wlsc_compositor *compositor)
 	shell->shell.unlock = tablet_shell_unlock;
 	shell->shell.map = tablet_shell_map;
 	shell->shell.configure = tablet_shell_configure;
+	shell->shell.destroy = tablet_shell_destroy;
 
 	launch_ux_daemon(shell);