From 4c6ecb73d694e7d9f542a4c3671211dae7e1926b Mon Sep 17 00:00:00 2001
From: Bakkeby <bakkeby@gmail.com>
Date: Fri, 2 Sep 2022 21:14:09 +0200
Subject: [PATCH] Adding focuspixel example patch

---
 config.def.h |  1 +
 dwm.c        | 50 ++++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 45 insertions(+), 6 deletions(-)

diff --git a/config.def.h b/config.def.h
index a2ac963..17d326b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -5,6 +5,7 @@ static const unsigned int borderpx  = 1;        /* border pixel of windows */
 static const unsigned int snap      = 32;       /* snap pixel */
 static const int showbar            = 1;        /* 0 means no bar */
 static const int topbar             = 1;        /* 0 means bottom bar */
+static const unsigned int fh        = 5;        /* focus window height */
 static const char *fonts[]          = { "monospace:size=10" };
 static const char dmenufont[]       = "monospace:size=10";
 static const char col_gray1[]       = "#222222";
diff --git a/dwm.c b/dwm.c
index a96f33c..85230b0 100644
--- a/dwm.c
+++ b/dwm.c
@@ -267,7 +267,7 @@ static Clr **scheme;
 static Display *dpy;
 static Drw *drw;
 static Monitor *mons, *selmon;
-static Window root, wmcheckwin;
+static Window root, wmcheckwin, focuswin;
 
 /* configuration, allows nested code to access above variables */
 #include "config.h"
@@ -487,6 +487,7 @@ cleanup(void)
 		drw_cur_free(drw, cursor[i]);
 	for (i = 0; i < LENGTH(colors); i++)
 		free(scheme[i]);
+	XDestroyWindow(dpy, focuswin);
 	XDestroyWindow(dpy, wmcheckwin);
 	drw_free(drw);
 	XSync(dpy, False);
@@ -787,6 +788,8 @@ expose(XEvent *e)
 void
 focus(Client *c)
 {
+	XWindowChanges wc;
+
 	if (!c || !ISVISIBLE(c))
 		for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
 	if (selmon->sel && selmon->sel != c)
@@ -800,10 +803,15 @@ focus(Client *c)
 		attachstack(c);
 		grabbuttons(c, 1);
 		XSetWindowBorder(dpy, c->win, scheme[SchemeSel][ColBorder].pixel);
+		XMoveResizeWindow(dpy, focuswin, c->x + c->w - fh, c->y + c->h - fh, fh, fh);
+		wc.stack_mode = Above;
+		wc.sibling = c->win;
+		XConfigureWindow(dpy, focuswin, CWSibling|CWStackMode, &wc);
 		setfocus(c);
 	} else {
 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
+		XMoveWindow(dpy, focuswin, 0, -fh);
 	}
 	selmon->sel = c;
 	drawbars();
@@ -1152,6 +1160,8 @@ movemouse(const Arg *arg)
 	restack(selmon);
 	ocx = c->x;
 	ocy = c->y;
+	nx = ocx = c->x;
+	ny = ocy = c->y;
 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
 		None, cursor[CurMove]->cursor, CurrentTime) != GrabSuccess)
 		return;
@@ -1183,16 +1193,24 @@ movemouse(const Arg *arg)
 			if (!c->isfloating && selmon->lt[selmon->sellt]->arrange
 			&& (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
 				togglefloating(NULL);
-			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
+			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating) {
 				resize(c, nx, ny, c->w, c->h, 1);
+				XMoveWindow(dpy, focuswin, nx + c->w - fh, ny + c->h - fh);
+				XMoveWindow(dpy, c->win, nx, ny);
+			}
 			break;
 		}
 	} while (ev.type != ButtonRelease);
+
 	XUngrabPointer(dpy, CurrentTime);
+	resize(c, nx, ny, c->w, c->h, 1);
+
 	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
 		sendmon(c, m);
 		selmon = m;
 		focus(NULL);
+	} else {
+		focus(c);
 	}
 }
 
@@ -1307,6 +1325,8 @@ resizemouse(const Arg *arg)
 	restack(selmon);
 	ocx = c->x;
 	ocy = c->y;
+	nh = c->h;
+	nw = c->w;
 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
 		None, cursor[CurResize]->cursor, CurrentTime) != GrabSuccess)
 		return;
@@ -1333,18 +1353,25 @@ resizemouse(const Arg *arg)
 				&& (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
 					togglefloating(NULL);
 			}
-			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating)
-				resize(c, c->x, c->y, nw, nh, 1);
+			if (!selmon->lt[selmon->sellt]->arrange || c->isfloating) {
+				XMoveResizeWindow(dpy, focuswin, c->x, c->y, nw + 2 * c->bw, fh);
+				XMoveResizeWindow(dpy, c->win, c->x, c->y + fh, nw, nh - fh);
+			}
 			break;
 		}
 	} while (ev.type != ButtonRelease);
+
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
 	XUngrabPointer(dpy, CurrentTime);
+	resize(c, c->x, c->y, nw, nh, 1);
+
 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 	if ((m = recttomon(c->x, c->y, c->w, c->h)) != selmon) {
 		sendmon(c, m);
 		selmon = m;
 		focus(NULL);
+	} else {
+		focus(c);
 	}
 }
 
@@ -1358,8 +1385,10 @@ restack(Monitor *m)
 	drawbar(m);
 	if (!m->sel)
 		return;
-	if (m->sel->isfloating || !m->lt[m->sellt]->arrange)
+	if (m->sel->isfloating || !m->lt[m->sellt]->arrange) {
 		XRaiseWindow(dpy, m->sel->win);
+		XRaiseWindow(dpy, focuswin);
+	}
 	if (m->lt[m->sellt]->arrange) {
 		wc.stack_mode = Below;
 		wc.sibling = m->barwin;
@@ -1534,7 +1563,7 @@ void
 setup(void)
 {
 	int i;
-	XSetWindowAttributes wa;
+	XSetWindowAttributes wa, fwa;
 	Atom utf8string;
 
 	/* clean up any zombies immediately */
@@ -1589,6 +1618,14 @@ setup(void)
 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 		PropModeReplace, (unsigned char *) netatom, NetLast);
 	XDeleteProperty(dpy, root, netatom[NetClientList]);
+	/* focus window */
+	fwa.override_redirect = 1;
+	fwa.background_pixel = scheme[SchemeSel][ColBorder].pixel;
+	focuswin = XCreateWindow(dpy, root, -1, -1, 1, 1, 0, DefaultDepth(dpy, screen),
+		InputOutput, DefaultVisual(dpy, screen),
+		CWOverrideRedirect|CWBackPixel, &fwa
+	);
+	XMapWindow(dpy, focuswin);
 	/* select events */
 	wa.cursor = cursor[CurNormal]->cursor;
 	wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
@@ -1723,6 +1760,7 @@ togglefloating(const Arg *arg)
 		resize(selmon->sel, selmon->sel->x, selmon->sel->y,
 			selmon->sel->w, selmon->sel->h, 0);
 	arrange(selmon);
+	focus(NULL);
 }
 
 void
-- 
2.19.1