From 33e91e39690fee930c61166edd5423d3853d362a Mon Sep 17 00:00:00 2001
From: piotrruss <mail@pruss.it>
Date: Sun, 7 Apr 2024 19:51:16 +0200
Subject: active opacity patch applied

---
 dwm.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

(limited to 'dwm.c')

diff --git a/dwm.c b/dwm.c
index 17fd55b..9f5d481 100644
--- a/dwm.c
+++ b/dwm.c
@@ -62,7 +62,7 @@ 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 */
@@ -186,6 +186,7 @@ static void monocle(Monitor *m);
 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 *c);
 static void propertynotify(XEvent *e);
 static void quit(const Arg *arg);
@@ -213,6 +214,7 @@ static void tagmon(const Arg *arg);
 static void tile(Monitor *m);
 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);
@@ -813,6 +815,7 @@ 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]);
@@ -1219,6 +1222,18 @@ nexttiled(Client *c)
 	return 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)
 {
@@ -1599,6 +1614,7 @@ 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);
@@ -1755,6 +1771,14 @@ togglefloating(const Arg *arg)
 	arrange(selmon);
 }
 
+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)
 {
@@ -1788,6 +1812,7 @@ 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);
-- 
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