From ea4b871e16ae63db67f2bf89c00e814b3dde6c78 Mon Sep 17 00:00:00 2001
From: Tony Crisci <tony@dubstepdish.com>
Date: Wed, 13 Dec 2017 17:54:19 -0500
Subject: [PATCH] xwm: user custom event handler

---
 include/wlr/xwayland.h          | 7 +++++++
 {xwayland => include/wlr}/xwm.h | 0
 meson.build                     | 2 +-
 xwayland/xwayland.c             | 2 +-
 xwayland/xwm.c                  | 8 +++++++-
 5 files changed, 16 insertions(+), 3 deletions(-)
 rename {xwayland => include/wlr}/xwm.h (100%)

diff --git a/include/wlr/xwayland.h b/include/wlr/xwayland.h
index 792d2b88..9a89661b 100644
--- a/include/wlr/xwayland.h
+++ b/include/wlr/xwayland.h
@@ -32,6 +32,13 @@ struct wlr_xwayland {
 		struct wl_signal new_surface;
 	} events;
 
+	/**
+	 * Add a custom event handler to xwayland. Return 1 if the event was
+	 * handled or 0 to use the default wlr-xwayland handler. wlr-xwayland will
+	 * free the event.
+	 */
+	int (*user_event_handler)(struct wlr_xwm *xwm, xcb_generic_event_t *event);
+
 	void *data;
 };
 
diff --git a/xwayland/xwm.h b/include/wlr/xwm.h
similarity index 100%
rename from xwayland/xwm.h
rename to include/wlr/xwm.h
diff --git a/meson.build b/meson.build
index addea930..a3f5e7f9 100644
--- a/meson.build
+++ b/meson.build
@@ -87,7 +87,7 @@ if get_option('enable_xwayland')
 	wlr_parts += [lib_wlr_xwayland]
 	conf_data.set('WLR_HAS_XWAYLAND', true)
 else
-	exclude_files += ['xwayland.h']
+	exclude_files += ['xwayland.h', 'xwm.h']
 endif
 configure_file(output: 'config.h', install_dir: 'include/wlr', configuration: conf_data)
 install_subdir('include/wlr', install_dir: 'include', exclude_files: exclude_files)
diff --git a/xwayland/xwayland.c b/xwayland/xwayland.c
index ecec785c..eb06bd57 100644
--- a/xwayland/xwayland.c
+++ b/xwayland/xwayland.c
@@ -19,7 +19,7 @@
 #include "wlr/util/log.h"
 #include "wlr/xwayland.h"
 #include "sockets.h"
-#include "xwm.h"
+#include "wlr/xwm.h"
 
 #ifdef __FreeBSD__
 static inline int clearenv(void) {
diff --git a/xwayland/xwm.c b/xwayland/xwm.c
index a86fbd0e..54092cda 100644
--- a/xwayland/xwm.c
+++ b/xwayland/xwm.c
@@ -12,7 +12,7 @@
 #include "wlr/types/wlr_surface.h"
 #include "wlr/xwayland.h"
 #include "wlr/xcursor.h"
-#include "xwm.h"
+#include "wlr/xwm.h"
 
 #ifdef HAS_XCB_ICCCM
 	#include <xcb/xcb_icccm.h>
@@ -938,6 +938,12 @@ static int x11_event_handler(int fd, uint32_t mask, void *data) {
 
 	while ((event = xcb_poll_for_event(xwm->xcb_conn))) {
 		count++;
+
+		if (xwm->xwayland->user_event_handler &&
+				xwm->xwayland->user_event_handler(xwm, event)) {
+			break;
+		}
+
 		switch (event->response_type & XCB_EVENT_RESPONSE_TYPE_MASK) {
 		case XCB_CREATE_NOTIFY:
 			xwm_handle_create_notify(xwm, (xcb_create_notify_event_t *)event);