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keychord: bind a sequence of keys, and dispatch events while waiting

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Original keychord patch by Hai Nguyen <hhai2105@gmail.com>, updated for
dwm 6.4+ grabkeys() by Aaron Zueger <contact@azureorange.xyz>. This
revision rebases onto dwm 6.8 and fixes an event-loss bug in the chord
wait loop.

The wait loop used to discard every event that was not a KeyPress:

    while (running && !XNextEvent(dpy, &event) && !ran)
            if(event.type == KeyPress)
                    break;

Two consequences, both reproduced on Xephyr:

1. Unrecoverable input freeze. grabbuttons() grabs unfocused clients
   GrabModeSync/GrabModeSync, so clicking one freezes pointer AND
   keyboard until the grabbing client calls XAllowEvents. dwm does that
   in buttonpress() -- but if the ButtonPress is discarded here,
   buttonpress() never runs. The grab stays frozen forever and the loop
   can never exit, because a frozen keyboard cannot deliver the KeyPress
   it is waiting for. Only killing dwm ends it; XSendEvent is discarded
   by this same loop and XTEST queues behind the frozen device.
   Repro: press a chord prefix, then click any unfocused client.
   Observed: XGrabKeyboard -> GrabFrozen, XQueryPointer -> Button1 held.

2. Orphaned windows. A MapRequest arriving mid-chord is dropped, so a
   window opening during a chord is never managed. DestroyNotify,
   Expose and ConfigureRequest are lost the same way.

Dispatch through handler[] as run() does, breaking on KeyPress before
dispatch so keypress() cannot recurse. The `&& !ran` term is dropped:
ran is always 0 on entry and nothing in the body can set it.
This commit is contained in:
Lukasz Kasprzak authored and Łukasz Pankowski committed 2026-10-19 09:10:49 +02:00
1 parent 636dcaf763
commit 9610f461c2
3 files changed
+219 -168
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config.h
+79 -80
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@@ -7,8 +7,8 @@ static const unsigned int gappx = 2; /* gaps between 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 char *fonts[] = { "monospace:size=11" };
static const char dmenufont[] = "monospace:size=11";
static const char *fonts[] = { "monospace:size=10" };
static const char dmenufont[] = "monospace:size=10";
static const char col_gray1[] = "#222222";
static const char col_gray2[] = "#444444";
static const char col_gray3[] = "#bbbbbb";
@@ -59,99 +59,98 @@ static const Layout layouts[] = {
/* key definitions */
#define MODKEY Mod4Mask
#define TAGKEYS(KEY,TAG) \
{ MODKEY, KEY, view, {.ui = 1 << TAG} }, \
{ MODKEY|ControlMask, KEY, toggleview, {.ui = 1 << TAG} }, \
{ MODKEY|ShiftMask, KEY, tag, {.ui = 1 << TAG} }, \
{ MODKEY|ControlMask|ShiftMask, KEY, toggletag, {.ui = 1 << TAG} },
#define TAGKEYS(KEY,TAG) \
&((Keychord){1, {{MODKEY, KEY}}, view, {.ui = 1 << TAG} }), \
&((Keychord){1, {{MODKEY|ControlMask, KEY}}, toggleview, {.ui = 1 << TAG} }), \
&((Keychord){1, {{MODKEY|ShiftMask, KEY}}, tag, {.ui = 1 << TAG} }), \
&((Keychord){1, {{MODKEY|ControlMask|ShiftMask, KEY}}, toggletag, {.ui = 1 << TAG} }),
/* helper for spawning shell commands in the pre dwm-5.0 fashion */
#define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } }
/* commands */
static char dmenumon[2] = "0"; /* component of dmenu{dark,light}, manipulated in spawndmenu() */
static char dmenumon[8] = "0"; /* component of dmenu{dark,light}, manipulated in spawndmenu() */
static const char *dmenudark[] = { "dmenu_run", "-l", "10", "-m", dmenumon, "-i", "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
static const char *dmenulight[] = { "dmenu_run", "-l", "10", "-m", dmenumon, "-i", "-fn", dmenufont, "-nb", col_gray3, "-nf", col_gray1, "-sb", col_cyan, "-sf", col_gray4, NULL };
static const char *termcmd[] = { "alacritty", NULL };
static const char *termcmd[] = { "st", NULL };
static const char *lockcmd[] = { "slock", NULL };
static const char *suspendcmd[] = { "systemctl", "suspend", NULL };
static const char *themecmd[] = { "lupan-set-theme", "toggle", NULL };
static const char *changeresulutioncmd[] = { "change-resolution", NULL };
#include "shift-tools.c"
#include "exitdwm.c"
#include "movestack.c"
static const Key keys[] = {
/* modifier key function argument */
{ MODKEY, XK_p, spawndmenu, {0} },
{ MODKEY, XK_u, shiftview, { .i = +1 } },
{ MODKEY|ShiftMask, XK_u, shifttag, { .i = +1 } },
{ MODKEY|ShiftMask, XK_y, shifttag, { .i = -1 } },
{ MODKEY, XK_y, shiftview, { .i = -1 } },
{ MODKEY|ShiftMask, XK_Return, spawn, {.v = termcmd } },
{ MODKEY, XK_b, togglebar, {0} },
{ MODKEY, XK_j, focusstackvis, {.i = +1 } },
{ MODKEY, XK_k, focusstackvis, {.i = -1 } },
{ MODKEY|ControlMask, XK_j, focusstackhid, {.i = +1 } },
{ MODKEY|ControlMask, XK_k, focusstackhid, {.i = -1 } },
{ MODKEY, XK_i, incnmaster, {.i = +1 } },
{ MODKEY, XK_d, incnmaster, {.i = -1 } },
{ MODKEY, XK_h, setmfact, {.f = -0.05} },
{ MODKEY|ShiftMask, XK_h, shiftboth, { .i = -1 } },
{ MODKEY|ControlMask, XK_h, shiftswaptags, { .i = -1 } },
{ MODKEY|ControlMask, XK_l, shiftswaptags, { .i = +1 } },
{ MODKEY|ShiftMask, XK_l, shiftboth, { .i = +1 } },
{ MODKEY, XK_l, setmfact, {.f = +0.05} },
{ MODKEY|ShiftMask, XK_j, movestack, {.i = +1 } },
{ MODKEY|ShiftMask, XK_k, movestack, {.i = -1 } },
{ MODKEY, XK_Return, zoom, {0} },
{ MODKEY, XK_Tab, view, {0} },
{ MODKEY, XK_w, goback, {0} },
{ MODKEY|ShiftMask, XK_c, killclient, {0} },
{ MODKEY, XK_t, setlayout, {.v = &layouts[0]} },
{ MODKEY, XK_f, setlayout, {.v = &layouts[1]} },
{ MODKEY, XK_m, setlayout, {.v = &layouts[2]} },
{ MODKEY, XK_g, setlayout, {.v = &layouts[3]} },
{ MODKEY, XK_space, setlayout, {0} },
{ MODKEY|ShiftMask, XK_space, togglefloating, {0} },
{ MODKEY, XK_0, view, {.ui = ~0 } },
{ MODKEY|ShiftMask, XK_0, tag, {.ui = ~0 } },
{ MODKEY, XK_comma, focusmon, {.i = -1 } },
{ MODKEY, XK_period, focusmon, {.i = +1 } },
{ MODKEY|ShiftMask, XK_comma, tagmon, {.i = -1 } },
{ MODKEY|ShiftMask, XK_period, tagmon, {.i = +1 } },
{ MODKEY, XK_s, show, {0} },
{ MODKEY|ShiftMask, XK_s, showall, {0} },
{ MODKEY|ControlMask, XK_s, hide, {0} },
TAGKEYS( XK_1, 0)
TAGKEYS( XK_2, 1)
TAGKEYS( XK_3, 2)
TAGKEYS( XK_4, 3)
TAGKEYS( XK_5, 4)
TAGKEYS( XK_6, 5)
TAGKEYS( XK_7, 6)
TAGKEYS( XK_8, 7)
TAGKEYS( XK_9, 8)
{ ControlMask, XK_1, focusbynum, {.i = 0} },
{ ControlMask, XK_2, focusbynum, {.i = 1} },
{ ControlMask, XK_3, focusbynum, {.i = 2} },
{ ControlMask, XK_4, focusbynum, {.i = 3} },
{ ControlMask, XK_5, focusbynum, {.i = 4} },
{ ControlMask, XK_6, focusbynum, {.i = 5} },
{ ControlMask, XK_7, focusbynum, {.i = 6} },
{ ControlMask, XK_8, focusbynum, {.i = 7} },
{ ControlMask, XK_9, focusbynum, {.i = 8} },
{ MODKEY|ShiftMask, XK_q, quit, {0} },
{ MODKEY|ControlMask|ShiftMask, XK_q, quit, {1} },
{ MODKEY|ShiftMask, XK_e, exitdwm, {0} },
{ MODKEY, XK_o, winview, {0} },
{ MODKEY, XK_a, gridall, {} },
{ MODKEY, XK_r, winviewmono, {} },
{ MODKEY, XK_n, spawn, {.v = changeresulutioncmd } },
{ MODKEY|ControlMask|ShiftMask, XK_s, spawn, {.v = suspendcmd } },
{ MODKEY|ControlMask|ShiftMask, XK_l, spawn, {.v = lockcmd } },
{ MODKEY|ControlMask|ShiftMask, XK_t, spawn, {.v = themecmd } },
static Keychord *keychords[] = {
/* Keys function argument */
&((Keychord){1, {{MODKEY, XK_p}}, spawndmenu, {0} }),
&((Keychord){1, {{MODKEY, XK_u}}, shiftview, { .i = +1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_u}}, shifttag, { .i = +1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_y}}, shifttag, { .i = -1 } }),
&((Keychord){1, {{MODKEY, XK_y}}, shiftview, { .i = -1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_Return}}, spawn, {.v = termcmd } }),
&((Keychord){2, {{MODKEY, XK_e}, {MODKEY, XK_e}}, spawn, {.v = termcmd } }),
&((Keychord){1, {{MODKEY, XK_b}}, togglebar, {0} }),
&((Keychord){1, {{MODKEY, XK_j}}, focusstackvis, {.i = +1 } }),
&((Keychord){1, {{MODKEY, XK_k}}, focusstackvis, {.i = -1 } }),
&((Keychord){1, {{MODKEY|ControlMask, XK_j}}, focusstackhid, {.i = +1 } }),
&((Keychord){1, {{MODKEY|ControlMask, XK_k}}, focusstackhid, {.i = -1 } }),
&((Keychord){1, {{MODKEY, XK_i}}, incnmaster, {.i = +1 } }),
&((Keychord){1, {{MODKEY, XK_d}}, incnmaster, {.i = -1 } }),
&((Keychord){1, {{MODKEY, XK_h}}, setmfact, {.f = -0.05} }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_h}}, shiftboth, {.i = -1} }),
&((Keychord){1, {{MODKEY|ControlMask, XK_h}}, shiftswaptags, {.i = -1} }),
&((Keychord){1, {{MODKEY, XK_l}}, setmfact, {.f = +0.05} }),
&((Keychord){1, {{MODKEY|ControlMask, XK_l}}, shiftswaptags, { .i = +1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_l}}, shiftboth, { .i = +1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_j}}, movestack, {.i = +1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_k}}, movestack, {.i = -1 } }),
&((Keychord){1, {{MODKEY, XK_Return}}, zoom, {0} }),
&((Keychord){1, {{MODKEY, XK_Tab}}, view, {0} }),
&((Keychord){1, {{MODKEY, XK_w}}, goback, {0} }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_c}}, killclient, {0} }),
&((Keychord){1, {{MODKEY, XK_t}}, setlayout, {.v = &layouts[0]} }),
&((Keychord){1, {{MODKEY, XK_f}}, setlayout, {.v = &layouts[1]} }),
&((Keychord){1, {{MODKEY, XK_m}}, setlayout, {.v = &layouts[2]} }),
&((Keychord){1, {{MODKEY, XK_g}}, setlayout, {.v = &layouts[3]} }),
&((Keychord){1, {{MODKEY, XK_space}}, setlayout, {0} }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_space}}, togglefloating, {0} }),
&((Keychord){1, {{MODKEY, XK_0}}, view, {.ui = ~0 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_0}}, tag, {.ui = ~0 } }),
&((Keychord){1, {{MODKEY, XK_comma}}, focusmon, {.i = -1 } }),
&((Keychord){1, {{MODKEY, XK_period}}, focusmon, {.i = +1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_comma}}, tagmon, {.i = -1 } }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_period}}, tagmon, {.i = +1 } }),
&((Keychord){1, {{MODKEY, XK_s}}, show, {0} }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_s}}, showall, {0} }),
&((Keychord){1, {{MODKEY|ControlMask, XK_s}}, hide, {0} }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_q}}, quit, {0} }),
&((Keychord){1, {{MODKEY|ControlMask|ShiftMask, XK_q}}, quit, {1} }),
&((Keychord){1, {{MODKEY|ShiftMask, XK_e}}, exitdwm, {0} }),
&((Keychord){1, {{MODKEY, XK_o}}, winview, {0} }),
&((Keychord){1, {{MODKEY, XK_a}}, gridall, {0} }),
&((Keychord){1, {{MODKEY, XK_r}}, winviewmono, {0} }),
&((Keychord){1, {{MODKEY|ControlMask|ShiftMask, XK_s}}, spawn, {.v = suspendcmd } }),
&((Keychord){1, {{MODKEY|ControlMask|ShiftMask, XK_l}}, spawn, {.v = lockcmd } }),
&((Keychord){1, {{MODKEY|ControlMask|ShiftMask, XK_t}}, spawn, {.v = themecmd } }),
TAGKEYS( XK_1, 0)
TAGKEYS( XK_2, 1)
TAGKEYS( XK_3, 2)
TAGKEYS( XK_4, 3)
TAGKEYS( XK_5, 4)
TAGKEYS( XK_6, 5)
TAGKEYS( XK_7, 6)
TAGKEYS( XK_8, 7)
TAGKEYS( XK_9, 8)
&((Keychord){1, {{ ControlMask, XK_1}}, focusbynum, {.i = 0} }),
&((Keychord){1, {{ ControlMask, XK_2}}, focusbynum, {.i = 1} }),
&((Keychord){1, {{ ControlMask, XK_3}}, focusbynum, {.i = 2} }),
&((Keychord){1, {{ ControlMask, XK_4}}, focusbynum, {.i = 3} }),
&((Keychord){1, {{ ControlMask, XK_5}}, focusbynum, {.i = 4} }),
&((Keychord){1, {{ ControlMask, XK_6}}, focusbynum, {.i = 5} }),
&((Keychord){1, {{ ControlMask, XK_7}}, focusbynum, {.i = 6} }),
&((Keychord){1, {{ ControlMask, XK_8}}, focusbynum, {.i = 7} }),
&((Keychord){1, {{ ControlMask, XK_9}}, focusbynum, {.i = 8} }),
};
/* button definitions */