1 files changed, 36 insertions, 14 deletions

diff --git a/dmenu/dmenu.c b/dmenu/dmenu.c
index 40153dc..066d20f 100644
--- a/dmenu/dmenu.c
+++ b/dmenu/dmenu.c
@@ -64,9 +64,12 @@ char color[8];
 } ColorShm;
 static ColorShm *accentshm;
 static char accentcol[8] = "#005577";
+static const double opacity = 0.85;
 
 static void initaccent(void);
 static void updateaccent(void);
+static int  openaccent(void);
+static void setopacity(Window w, double opacity);
 
 #include "config.h"
 
@@ -127,13 +130,30 @@ cleanup(void)
 	XCloseDisplay(dpy);
 }
 
+static int
+openaccent(void)
+{
+        int fd;
+        if (accentshm)
+                return 1;
+        if ((fd = shm_open(SHMNAME, O_RDONLY, 0)) < 0)
+                return 0;
+        accentshm = mmap(NULL, sizeof(ColorShm), PROT_READ, MAP_SHARED, fd, 0);
+        close(fd);
+        if (accentshm == MAP_FAILED) {
+                accentshm = NULL;
+                return 0;
+        }
+        return 1;
+}
+
 static void
 updateaccent(void)
 {
         uint32_t s1, s2;
         char tmp[8];
 
-        if (!accentshm)
+        if (!accentshm && !openaccent())
                 return;
         do {
                 s1 = accentshm->seq;
@@ -149,15 +169,7 @@ updateaccent(void)
 static void
 initaccent(void)
 {
-int fd = shm_open(SHMNAME, O_RDONLY, 0);
-if (fd >= 0) {
-accentshm = mmap(NULL, sizeof(ColorShm), PROT_READ,
- MAP_SHARED, fd, 0);
-if (accentshm == MAP_FAILED)
-accentshm = NULL;
-close(fd);
-}
-updateaccent();
+        updateaccent();
 }
 static char *
 cistrstr(const char *h, const char *n)
@@ -240,6 +252,15 @@ drawmenu(void)
 }
 
 static void
+setopacity(Window w, double op)
+{
+        unsigned long val = op * 0xffffffff;
+        XChangeProperty(dpy, w, XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False),
+                        XA_CARDINAL, 32, PropModeReplace,
+                        (unsigned char *)&val, 1);
+}
+
+static void
 grabfocus(void)
 {
 	struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000  };
@@ -758,10 +779,11 @@ setup(void)
 	xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
 	                XNClientWindow, win, XNFocusWindow, win, NULL);
 
-	XMapRaised(dpy, win);
-	if (embed) {
-		XReparentWindow(dpy, win, parentwin, x, y);
-		XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
+       XMapRaised(dpy, win);
+       setopacity(win, opacity);
+       if (embed) {
+               XReparentWindow(dpy, win, parentwin, x, y);
+               XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
 		if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
 			for (i = 0; i < du && dws[i] != win; ++i)
 				XSelectInput(dpy, dws[i], FocusChangeMask);