From 5799dd1fca6576b662d299e210cd5933b29d502d Mon Sep 17 00:00:00 2001 From: Stein Date: Mon, 15 Aug 2022 14:31:22 +0200 Subject: Remove blw variable in favour of calculating the value when needed The purpose and reasoning behind the bar layout width (blw) variable in dwm the way it is today may not be immediately obvious. The use of the variable makes more sense when looking at commit 2ce37bc from 2009 where blw was initialised in the setup function and it represented the maximum of all available layout symbols. for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) { w = TEXTW(layouts[i].symbol); blw = MAX(blw, w); } As such the layout symbol back then was fixed in size and both drawbar and buttonpress depended on this variable. The the way the blw variable is set today in drawbar means that it merely caches the size of the layout symbol for the last bar drawn. While unlikely to happen in practice it is possible that the last bar drawn is not that of the currently selected monitor, which can result in misaligned button clicks if there is a difference in layout symbol width between monitors. --- dwm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'dwm.c') diff --git a/dwm.c b/dwm.c index f2bc4ba..253aba7 100644 --- a/dwm.c +++ b/dwm.c @@ -240,7 +240,7 @@ static const char broken[] = "broken"; static char stext[256]; static int screen; static int sw, sh; /* X display screen geometry width, height */ -static int bh, blw = 0; /* bar geometry */ +static int bh; /* bar height */ static int lrpad; /* sum of left and right padding for text */ static int (*xerrorxlib)(Display *, XErrorEvent *); static unsigned int numlockmask = 0; @@ -440,7 +440,7 @@ buttonpress(XEvent *e) if (i < LENGTH(tags)) { click = ClkTagBar; arg.ui = 1 << i; - } else if (ev->x < x + blw) + } else if (ev->x < x + TEXTW(selmon->ltsymbol)) click = ClkLtSymbol; else if (ev->x > selmon->ww - (int)TEXTW(stext)) click = ClkStatusText; @@ -731,7 +731,7 @@ drawbar(Monitor *m) urg & 1 << i); x += w; } - w = blw = TEXTW(m->ltsymbol); + w = TEXTW(m->ltsymbol); drw_setscheme(drw, scheme[SchemeNorm]); x = drw_text(drw, x, 0, w, bh, lrpad / 2, m->ltsymbol, 0); -- cgit v1.2.3-70-g09d2 From c2b748e7931e5f28984efc236f9b1a212dbc65e8 Mon Sep 17 00:00:00 2001 From: Stein Date: Fri, 26 Aug 2022 14:48:46 +0200 Subject: Remove dmenumon variable Reasoning: Since 2011 dmenu has been capable of working out which monitor currently has focus in a Xinerama setup, making the use of the -m flag more or less redundant. This is easily demonstrated by using dmenu in any other window manager. There used to be a nodmenu patch that provided these changes: https://git.suckless.org/sites/commit/ed68e3629de4ef2ca2d3f8893a79fb570b4c0cbc.html but this was removed on the basis that it was very easy to work out and apply manually if needed. The proposal here is to remove this dependency from dwm. The mechanism of the dmenumon variable could be provided via a patch if need be. The edge case scenario that dmenu does not handle on its own, and the effect of removing this mechanism, is that if the user trigger focusmon via keybindings to change focus to another monitor that has no clients, then dmenu will open on the monitor containing the window with input focus (or the monitor with the mouse cursor if no windows have input focus). If this edge case is important to cover then this can be addressed by setting input focus to selmon->barwin in the focus function if there is no client to give focus to (rather than giving focus back to the root window). --- config.def.h | 3 +-- dwm.c | 2 -- 2 files changed, 1 insertion(+), 4 deletions(-) (limited to 'dwm.c') diff --git a/config.def.h b/config.def.h index 9efa774..061ad66 100644 --- a/config.def.h +++ b/config.def.h @@ -56,8 +56,7 @@ static const Layout layouts[] = { #define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } } /* commands */ -static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn() */ -static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL }; +static const char *dmenucmd[] = { "dmenu_run", "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL }; static const char *termcmd[] = { "st", NULL }; static const Key keys[] = { diff --git a/dwm.c b/dwm.c index 253aba7..e5efb6a 100644 --- a/dwm.c +++ b/dwm.c @@ -1639,8 +1639,6 @@ sigchld(int unused) void spawn(const Arg *arg) { - if (arg->v == dmenucmd) - dmenumon[0] = '0' + selmon->num; if (fork() == 0) { if (dpy) close(ConnectionNumber(dpy)); -- cgit v1.2.3-70-g09d2