Fade inactive patch

2 files changed, 30 insertions, 1 deletions

diff --git a/config.def.h b/config.def.h
index 7f3720f..d033a1c 100644
--- a/config.def.h
+++ b/config.def.h
@@ -13,6 +13,9 @@ static int smartgaps                = 0;        /* 1 means no outer gap when the
 static const int swallowfloating    = 0;        /* 1 means swallow floating windows by default */
 static const int showbar            = 1;        /* 0 means no bar */
 static const int topbar             = 1;        /* 0 means bottom bar */
+static const double activeopacity   = 1.0f;     /* Window opacity when it's focused (0 <= opacity <= 1) */
+static const double inactiveopacity = 0.875f;   /* Window opacity when it's inactive (0 <= opacity <= 1) */
+static       Bool bUseOpacity       = True;     /* Starts with opacity on any unfocused windows */
 static const int vertpad            = 10;       /* vertical padding of bar */
 static const int sidepad            = 10;       /* horizontal padding of bar */
 static const char *fonts[]          = { "monospace:size=10" };
@@ -98,6 +101,7 @@ static Key keys[] = {
 	{ MODKEY|Mod4Mask,              XK_0,      togglegaps,     {0} },
 	{ MODKEY|Mod4Mask|ShiftMask,    XK_0,      defaultgaps,    {0} },
 	{ MODKEY,                       XK_Tab,    view,           {0} },
+	{ MODKEY,                       XK_a,      toggleopacity,  {0} },
 	{ MODKEY|ShiftMask,             XK_c,      killclient,     {0} },
 	{ MODKEY,                       XK_t,      setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
diff --git a/dwm.c b/dwm.c
index c1540f3..3eab607 100644
--- a/dwm.c
+++ b/dwm.c
@@ -68,7 +68,7 @@ enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
 enum { SchemeNorm, SchemeSel }; /* color schemes */
 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
-       NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
+       NetWMWindowTypeDialog, NetClientList, NetWMWindowsOpacity, NetLast }; /* EWMH atoms */
 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
        ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
@@ -200,6 +200,7 @@ static void moveresize(const Arg *arg);
 static void motionnotify(XEvent *e);
 static void movemouse(const Arg *arg);
 static Client *nexttiled(Client *c);
+static void opacity(Client *c, double opacity);
 static void pop(Client *);
 static void propertynotify(XEvent *e);
 static void quit(const Arg *arg);
@@ -230,6 +231,7 @@ static void tagtoleft(const Arg *arg);
 static void tagtoright(const Arg *arg);
 static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
+static void toggleopacity(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
 static void unfocus(Client *c, int setfocus);
@@ -896,6 +898,7 @@ focus(Client *c)
 		grabbuttons(c, 1);
 		XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
 		setfocus(c);
+		opacity(c, activeopacity);
 	} else {
 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
@@ -1368,6 +1371,18 @@ nexttiled(Client *c)
 }
 
 void
+opacity(Client *c, double opacity)
+{
+	if(bUseOpacity && opacity > 0 && opacity < 1) {
+		unsigned long real_opacity[] = { opacity * 0xffffffff };
+		XChangeProperty(dpy, c->win, netatom[NetWMWindowsOpacity], XA_CARDINAL,
+				32, PropModeReplace, (unsigned char *)real_opacity,
+				1);
+	} else
+		XDeleteProperty(dpy, c->win, netatom[NetWMWindowsOpacity]);
+}
+
+void
 pop(Client *c)
 {
 	detach(c);
@@ -1745,6 +1760,7 @@ setup(void)
 	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
 	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 	netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
+	netatom[NetWMWindowsOpacity] = XInternAtom(dpy, "_NET_WM_WINDOW_OPACITY", False);
 	/* init cursors */
 	cursor[CurNormal] = drw_cur_create(drw, XC_left_ptr);
 	cursor[CurResize] = drw_cur_create(drw, XC_sizing);
@@ -1889,6 +1905,14 @@ togglefloating(const Arg *arg)
 }
 
 void
+toggleopacity(const Arg *arg) {
+	bUseOpacity = !bUseOpacity;
+	for (Monitor* m = mons; m; m = m->next)
+		for (Client* c = m->clients; c; c = c->next)
+			opacity(c, (bUseOpacity && c != selmon->sel) ? inactiveopacity : activeopacity);
+}
+
+void
 toggletag(const Arg *arg)
 {
 	unsigned int newtags;
@@ -1921,6 +1945,7 @@ unfocus(Client *c, int setfocus)
 	if (!c)
 		return;
 	grabbuttons(c, 0);
+	opacity(c, inactiveopacity);
 	XSetWindowBorder(dpy, c->win, scheme[SchemeNorm][ColBorder].pixel);
 	if (setfocus) {
 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);