1 files changed, 88 insertions, 0 deletions
diff --git a/cmd/wmii/xdnd.c b/cmd/wmii/xdnd.c
new file mode 100644
index 0000000..abb3612
--- /dev/null
+++ b/cmd/wmii/xdnd.c
@@ -0,0 +1,88 @@
+/* Copyright ©2008-2010 Kris Maglione <maglione.k at Gmail>
+ * See LICENSE file for license details.
+ */
+#include "dat.h"
+#include "fns.h"
+
+void
+xdnd_initwindow(Window *w) {
+	long l;
+
+	l = 3; /* They are insane. Why is this an ATOM?! */
+	changeprop_long(w, "XdndAware", "ATOM", &l, 1);
+}
+
+typedef struct Dnd Dnd;
+struct Dnd {
+	XWindow		source;
+	Rectangle	r;
+};
+
+int
+xdnd_clientmessage(XClientMessageEvent *e) {
+	Window *w;
+	Dnd *dnd;
+	long *l;
+	Rectangle r;
+	Point p;
+	long pos, siz;
+	ulong msg;
+
+	dnd = nil;
+	msg = e->message_type;
+	l = e->data.l;
+	Dprint(DDnd, "ClientMessage: %A\n", msg);
+
+	if(msg == xatom("XdndEnter")) {
+		if(e->format != 32)
+			return -1;
+		w = findwin(e->window);
+		if(w) {
+			if(w->dnd == nil)
+				w->dnd = emallocz(sizeof *dnd);
+			dnd = w->dnd;
+			dnd->source = l[0];
+			dnd->r = ZR;
+		}
+		return 1;
+	}else
+	if(msg == xatom("XdndLeave")) {
+		if(e->format != 32)
+			return -1;
+		w = findwin(e->window);
+		if(w && w->dnd) {
+			free(w->dnd);
+			w->dnd = nil;
+		}
+		return 1;
+	}else
+	if(msg == xatom("XdndPosition")) {
+		if(e->format != 32)
+			return -1;
+		r = ZR;
+		w = findwin(e->window);
+		if(w)
+			dnd = w->dnd;
+		if(dnd) {
+			p.x = (ulong)l[2] >> 16;
+			p.y = (ulong)l[2] & 0xffff;
+			p = subpt(p, w->r.min);
+			Dprint(DDnd, "\tw: %W\n", w);
+			Dprint(DDnd, "\tp: %P\n", p);
+			if(eqrect(dnd->r, ZR) || !rect_haspoint_p(p, dnd->r))
+				if(w->handler->dndmotion)
+					dnd->r = w->handler->dndmotion(w, p);
+			r = dnd->r;
+			if(!eqrect(r, ZR))
+				r = rectaddpt(r, w->r.min);
+			Dprint(DDnd, "\tr: %R\n", r);
+		}
+		pos = (r.min.x<<16) | r.min.y;
+		siz = (Dx(r)<<16) | Dy(r);
+		sendmessage(window(l[0]), "XdndStatus", e->window, 0, pos, siz, 0);
+		return 1;
+	}
+
+	return 0;
+}
+