Prepare a selection watcher interface

This commit adds the necessary method calls to setup the class and also
so that xfixes selection notify events can be handled. Currently, these
are empty functions, but later commits will fill them.

Signed-off-by: Uli Schlachter <psychon@znc.in>

CMakeLists.txt

@@ -88,6 +88,7 @@ set(AWE_SRCS
     ${BUILD_DIR}/objects/drawin.c
     ${BUILD_DIR}/objects/key.c
     ${BUILD_DIR}/objects/screen.c
+    ${BUILD_DIR}/objects/selection_watcher.c
     ${BUILD_DIR}/objects/tag.c
     ${BUILD_DIR}/objects/window.c)
 

event.c

@@ -24,6 +24,7 @@
 #include "property.h"
 #include "objects/tag.h"
 #include "objects/drawin.h"
+#include "objects/selection_watcher.h"
 #include "xwindow.h"
 #include "ewmh.h"
 #include "objects/client.h"
@@ -43,6 +44,7 @@
 #include <xcb/xcb_icccm.h>
 #include <xcb/xcb_event.h>
 #include <xcb/xkb.h>
+#include <xcb/xfixes.h>
 
 #define DO_EVENT_HOOK_CALLBACK(type, xcbtype, xcbeventprefix, arraytype, match) \
     static void \
@@ -1116,6 +1118,7 @@ void event_handle(xcb_generic_event_t *event)
     EXTENSION_EVENT(randr, XCB_RANDR_NOTIFY, event_handle_randr_output_change_notify);
     EXTENSION_EVENT(shape, XCB_SHAPE_NOTIFY, event_handle_shape_notify);
     EXTENSION_EVENT(xkb, 0, event_handle_xkb_notify);
+    EXTENSION_EVENT(xfixes, XCB_XFIXES_SELECTION_NOTIFY, event_handle_xfixes_selection_notify);
 #undef EXTENSION_EVENT
 }
 
@@ -1134,6 +1137,10 @@ void event_init(void)
     reply = xcb_get_extension_data(globalconf.connection, &xcb_xkb_id);
     if (reply && reply->present)
         globalconf.event_base_xkb = reply->first_event;
+
+    reply = xcb_get_extension_data(globalconf.connection, &xcb_xfixes_id);
+    if (reply && reply->present)
+        globalconf.event_base_xfixes = reply->first_event;
 }
 
 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

globalconf.h

@@ -115,6 +115,7 @@ typedef struct
     uint8_t event_base_shape;
     uint8_t event_base_xkb;
     uint8_t event_base_randr;
+    uint8_t event_base_xfixes;
     /** Clients list */
     client_array_t clients;
     /** Embedded windows */

luaa.c

@@ -49,6 +49,7 @@
 #include "objects/drawable.h"
 #include "objects/drawin.h"
 #include "objects/screen.h"
+#include "objects/selection_watcher.h"
 #include "objects/tag.h"
 #include "property.h"
 #include "selection.h"
@@ -1035,6 +1036,9 @@ luaA_init(xdgHandle* xdg, string_array_t *searchpath)
     /* Export keys */
     key_class_setup(L);
 
+    /* Export selection watcher */
+    selection_watcher_class_setup(L);
+
     /* add Lua search paths */
     lua_getglobal(L, "package");
     if (LUA_TTABLE != lua_type(L, 1))

objects/selection_watcher.c

@@ -0,0 +1,34 @@
+/*
+ * selection_watcher.h - selection change watcher
+ *
+ * Copyright © 2019 Uli Schlachter <psychon@znc.in>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include "objects/selection_watcher.h"
+
+void
+event_handle_xfixes_selection_notify(xcb_generic_event_t *ev)
+{
+}
+
+void
+selection_watcher_class_setup(lua_State *L)
+{
+}
+
+// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80

objects/selection_watcher.h

@@ -0,0 +1,33 @@
+/*
+ * selection_watcher.h - selection change watcher header
+ *
+ * Copyright © 2019 Uli Schlachter <psychon@znc.in>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef AWESOME_OBJECTS_SELECTION_WATCHER_H
+#define AWESOME_OBJECTS_SELECTION_WATCHER_H
+
+#include <lua.h>
+#include <xcb/xcb.h>
+
+void selection_watcher_class_setup(lua_State*);
+void event_handle_xfixes_selection_notify(xcb_generic_event_t*);
+
+#endif
+
+// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80