dwm-lock_masks-6.5.diff

From a492ae788e399fe80fb9ed54faa89ca1606018dd Mon Sep 17 00:00:00 2001
From: Bakkeby <bakkeby@gmail.com>
Date: Mon, 1 Jul 2024 22:26:29 +0200
Subject: [PATCH] lockmask patch

By default in dwm the status of Caps Lock and Num Lock is ignored
when handling keybindings.

To achieve this dwm will, for each button and key binding, subscribe
to all four combinations of the Caps and Num Lock states, then when
interpreting the key and button press events the lock states are
discarded by the CLEANMASK macro.

This patch changes this logic so that a user can, if they so desire,
have keybindings that are only active when the Caps Lock or Num Lock
are active - while still ignoring the Caps Lock and Num Lock states
for general keybindings.

As an example the following button bindings would allow the user to
move and resize windows using only the mouse buttons when Caps Lock
is on (i.e. no need to hold down a modifier key):

	{ ClkClientWin,         LockMask,       Button1,        movemouse,      {0} },
	{ ClkClientWin,         LockMask,       Button2,        togglefloating, {0} },
	{ ClkClientWin,         LockMask,       Button3,        resizemouse,    {0} },

The modifier for Num Lock is usually Mod2Mask, but check with xmodmap
to be sure.
---
 dwm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/dwm.c b/dwm.c
index f1d86b2..ded3652 100644
--- a/dwm.c
+++ b/dwm.c
@@ -46,7 +46,7 @@
 
 /* macros */
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
-#define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
+#define MATCHMASK(mod,state)    ((state & ~((numlockmask|LockMask) ^ ((numlockmask|LockMask) & mod))) == mod)
 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
 #define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
@@ -453,7 +453,7 @@ buttonpress(XEvent *e)
 	}
 	for (i = 0; i < LENGTH(buttons); i++)
 		if (click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
-		&& CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
+		&& MATCHMASK(buttons[i].mask, ev->state))
 			buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
 }
 
@@ -1007,7 +1007,7 @@ keypress(XEvent *e)
 	keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 	for (i = 0; i < LENGTH(keys); i++)
 		if (keysym == keys[i].keysym
-		&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
+		&& MATCHMASK(keys[i].mod, ev->state)
 		&& keys[i].func)
 			keys[i].func(&(keys[i].arg));
 }
-- 
2.45.2