From 238526bd48a9318672f8e2c20e8a3b3dbf16927d Mon Sep 17 00:00:00 2001
From: fluxgen <fluxgen>
Date: Wed, 14 Aug 2002 21:53:07 +0000
Subject: singleton

---
 src/FbAtoms.cc | 26 +++++++++++++++++++-------
 src/FbAtoms.hh | 10 ++++++----
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/src/FbAtoms.cc b/src/FbAtoms.cc
index e19ba21..4e2c7f5 100644
--- a/src/FbAtoms.cc
+++ b/src/FbAtoms.cc
@@ -19,24 +19,36 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
-// $Id: FbAtoms.cc,v 1.2 2002/03/18 20:29:16 fluxgen Exp $
+// $Id: FbAtoms.cc,v 1.3 2002/08/14 21:53:07 fluxgen Exp $
 
 #include "FbAtoms.hh"
 
+#include <string>
+using namespace std;
+
+FbAtoms *FbAtoms::s_singleton = 0;
+
 FbAtoms::FbAtoms(Display *display):m_init(false) {
-	if (display)
-		initAtoms(display);
+	if (s_singleton != 0)
+		throw string("You can only create one instance of FbAtoms");
+
+	if (display == 0)
+		throw string("Must supply FbAtoms with an valid display connection");
+
+	s_singleton = this;
+	initAtoms(display);
 }
 
 FbAtoms::~FbAtoms() {
 
 }
 
+FbAtoms *FbAtoms::instance() {
+	assert(s_singleton);
+	return s_singleton;
+}
+
 void FbAtoms::initAtoms(Display *display) {
-	if (m_init) //already done init?
-		return;
-	else
-		m_init = true;
 
 	xa_wm_colormap_windows =
 		XInternAtom(display, "WM_COLORMAP_WINDOWS", False);
diff --git a/src/FbAtoms.hh b/src/FbAtoms.hh
index 63882e2..3fb8b2b 100644
--- a/src/FbAtoms.hh
+++ b/src/FbAtoms.hh
@@ -19,21 +19,21 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
-// $Id: FbAtoms.hh,v 1.5 2002/08/12 19:25:35 fluxgen Exp $
+// $Id: FbAtoms.hh,v 1.6 2002/08/14 21:53:07 fluxgen Exp $
 #ifndef FBATOMS_HH
 #define FBATOMS_HH
 
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
+
 /**
 	atom handler, should probably be a singleton
 */
-class FbAtoms
-{
+class FbAtoms {
 public:
 	explicit FbAtoms(Display *display);
 	virtual ~FbAtoms();
-	void initAtoms(Display *display);
+	static FbAtoms *instance();
 
 #ifdef GNOME
 	inline Atom getGnomeProtAtom() const { return gnome_wm_prot; }
@@ -125,6 +125,7 @@ public:
 #endif // NEWWMSPEC
 
 private:
+	void initAtoms(Display *disp);
 // NETAttributes
 	Atom blackbox_attributes, blackbox_change_attributes, blackbox_hints;
 
@@ -177,6 +178,7 @@ private:
 		xa_wm_delete_window, xa_wm_take_focus, xa_wm_change_state,
 		motif_wm_hints;
 	bool m_init;
+	static FbAtoms *s_singleton;
 };
 
 #endif //FBATOMS_HH
-- 
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