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dwl/patches/swallow.patch
FabricSoul fc3ca3385c patch: swallow
2025-08-04 21:12:10 -04:00

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From a220e1ed4b04a66c837dfc8e3363d3e696cbf541 Mon Sep 17 00:00:00 2001
From: Nikita Ivanov <nikita.vyach.ivanov@gmail.com>
Date: Wed, 5 Feb 2025 02:34:39 +0100
Subject: [PATCH] Swallow: hide the terminal when it spawns a client
---
client.h | 12 ++++
config.def.h | 11 +++-
dwl.c | 152 +++++++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 168 insertions(+), 7 deletions(-)
diff --git a/client.h b/client.h
index 42f225f..bc9cad2 100644
--- a/client.h
+++ b/client.h
@@ -131,6 +131,18 @@ client_get_appid(Client *c)
return c->surface.xdg->toplevel->app_id;
}
+static inline int
+client_get_pid(Client *c)
+{
+ pid_t pid;
+#ifdef XWAYLAND
+ if (client_is_x11(c))
+ return c->surface.xwayland->pid;
+#endif
+ wl_client_get_credentials(c->surface.xdg->client->client, &pid, NULL, NULL);
+ return pid;
+}
+
static inline void
client_get_clip(Client *c, struct wlr_box *clip)
{
diff --git a/config.def.h b/config.def.h
index 22d2171..42342f1 100644
--- a/config.def.h
+++ b/config.def.h
@@ -13,6 +13,8 @@ static const float focuscolor[] = COLOR(0x005577ff);
static const float urgentcolor[] = COLOR(0xff0000ff);
/* This conforms to the xdg-protocol. Set the alpha to zero to restore the old behavior */
static const float fullscreen_bg[] = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
+static int enableautoswallow = 1; /* enables autoswallowing newly spawned clients */
+static float swallowborder = 1.0f; /* add this multiplied by borderpx to border when a client is swallowed */
/* tagging - TAGCOUNT must be no greater than 31 */
#define TAGCOUNT (9)
@@ -22,10 +24,11 @@ static int log_level = WLR_ERROR;
/* NOTE: ALWAYS keep a rule declared even if you don't use rules (e.g leave at least one example) */
static const Rule rules[] = {
- /* app_id title tags mask isfloating monitor */
+ /* app_id title tags mask isfloating isterm noswallow monitor */
/* examples: */
- { "Gimp_EXAMPLE", NULL, 0, 1, -1 }, /* Start on currently visible tags floating, not tiled */
- { "firefox_EXAMPLE", NULL, 1 << 8, 0, -1 }, /* Start on ONLY tag "9" */
+ { "foot", NULL, 0, 0, 1, 1, -1 },
+ { "Gimp_EXAMPLE", NULL, 0, 1, 0, 0, -1 }, /* Start on currently visible tags floating, not tiled */
+ { "firefox_EXAMPLE", NULL, 1 << 8, 0, 0, 0, -1 }, /* Start on ONLY tag "9" */
};
/* layout(s) */
@@ -142,6 +145,8 @@ static const Key keys[] = {
{ MODKEY, XKB_KEY_space, setlayout, {0} },
{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space, togglefloating, {0} },
{ MODKEY, XKB_KEY_e, togglefullscreen, {0} },
+ { MODKEY, XKB_KEY_a, toggleswallow, {0} },
+ { MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_A, toggleautoswallow,{0} },
{ MODKEY, XKB_KEY_0, view, {.ui = ~0} },
{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_parenright, tag, {.ui = ~0} },
{ MODKEY, XKB_KEY_comma, focusmon, {.i = WLR_DIRECTION_LEFT} },
diff --git a/dwl.c b/dwl.c
index def2562..71d500a 100644
--- a/dwl.c
+++ b/dwl.c
@@ -73,12 +73,13 @@
#define MAX(A, B) ((A) > (B) ? (A) : (B))
#define MIN(A, B) ((A) < (B) ? (A) : (B))
#define CLEANMASK(mask) (mask & ~WLR_MODIFIER_CAPS)
-#define VISIBLEON(C, M) ((M) && (C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]))
+#define VISIBLEON(C, M) ((M) && (C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]) && !(C)->swallowedby)
#define LENGTH(X) (sizeof X / sizeof X[0])
#define END(A) ((A) + LENGTH(A))
#define TAGMASK ((1u << TAGCOUNT) - 1)
#define LISTEN(E, L, H) wl_signal_add((E), ((L)->notify = (H), (L)))
#define LISTEN_STATIC(E, H) do { static struct wl_listener _l = {.notify = (H)}; wl_signal_add((E), &_l); } while (0)
+#define BORDERPX(C) (borderpx + ((C)->swallowing ? (int)ceilf(swallowborder * (C)->swallowing->bw) : 0))
/* enums */
enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */
@@ -104,7 +105,8 @@ typedef struct {
} Button;
typedef struct Monitor Monitor;
-typedef struct {
+typedef struct Client Client;
+struct Client {
/* Must keep these three elements in this order */
unsigned int type; /* XDGShell or X11* */
struct wlr_box geom; /* layout-relative, includes border */
@@ -140,8 +142,12 @@ typedef struct {
unsigned int bw;
uint32_t tags;
int isfloating, isurgent, isfullscreen;
+ int isterm, noswallow;
uint32_t resize; /* configure serial of a pending resize */
-} Client;
+ pid_t pid;
+ Client *swallowing; /* client being hidden */
+ Client *swallowedby;
+};
typedef struct {
uint32_t mod;
@@ -230,6 +236,8 @@ typedef struct {
const char *title;
uint32_t tags;
int isfloating;
+ int isterm;
+ int noswallow;
int monitor;
} Rule;
@@ -311,6 +319,7 @@ static void moveresize(const Arg *arg);
static void outputmgrapply(struct wl_listener *listener, void *data);
static void outputmgrapplyortest(struct wlr_output_configuration_v1 *config, int test);
static void outputmgrtest(struct wl_listener *listener, void *data);
+static pid_t parentpid(pid_t pid);
static void pointerfocus(Client *c, struct wlr_surface *surface,
double sx, double sy, uint32_t time);
static void printstatus(void);
@@ -335,11 +344,15 @@ static void setsel(struct wl_listener *listener, void *data);
static void setup(void);
static void spawn(const Arg *arg);
static void startdrag(struct wl_listener *listener, void *data);
+static void swallow(Client *c, Client *toswallow);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
+static Client *termforwin(Client *c);
static void tile(Monitor *m);
static void togglefloating(const Arg *arg);
static void togglefullscreen(const Arg *arg);
+static void toggleswallow(const Arg *arg);
+static void toggleautoswallow(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
static void unlocksession(struct wl_listener *listener, void *data);
@@ -466,11 +479,15 @@ applyrules(Client *c)
if (!(title = client_get_title(c)))
title = broken;
+ c->pid = client_get_pid(c);
+
for (r = rules; r < END(rules); r++) {
if ((!r->title || strstr(title, r->title))
&& (!r->id || strstr(appid, r->id))) {
c->isfloating = r->isfloating;
newtags |= r->tags;
+ c->isterm = r->isterm;
+ c->noswallow = r->noswallow;
i = 0;
wl_list_for_each(m, &mons, link) {
if (r->monitor == i++)
@@ -478,6 +495,12 @@ applyrules(Client *c)
}
}
}
+ if (enableautoswallow && !c->noswallow && !c->isfloating &&
+ !c->surface.xdg->initial_commit) {
+ Client *p = termforwin(c);
+ if (p)
+ swallow(c, p);
+ }
setmon(c, mon, newtags);
}
@@ -2006,6 +2029,20 @@ outputmgrtest(struct wl_listener *listener, void *data)
outputmgrapplyortest(config, 1);
}
+pid_t
+parentpid(pid_t pid)
+{
+ unsigned int v = 0;
+ FILE *f;
+ char buf[256];
+ snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)pid);
+ if (!(f = fopen(buf, "r")))
+ return 0;
+ fscanf(f, "%*u %*s %*c %u", &v);
+ fclose(f);
+ return (pid_t)v;
+}
+
void
pointerfocus(Client *c, struct wlr_surface *surface, double sx, double sy,
uint32_t time)
@@ -2326,7 +2363,7 @@ setfullscreen(Client *c, int fullscreen)
c->isfullscreen = fullscreen;
if (!c->mon || !client_surface(c)->mapped)
return;
- c->bw = fullscreen ? 0 : borderpx;
+ c->bw = fullscreen ? 0 : BORDERPX(c);
client_set_fullscreen(c, fullscreen);
wlr_scene_node_reparent(&c->scene->node, layers[c->isfullscreen
? LyrFS : c->isfloating ? LyrFloat : LyrTile]);
@@ -2404,6 +2441,9 @@ setmon(Client *c, Monitor *m, uint32_t newtags)
setfloating(c, c->isfloating);
}
focusclient(focustop(selmon), 1);
+
+ if (c->swallowing)
+ setmon(c->swallowing, m, newtags);
}
void
@@ -2669,6 +2709,44 @@ startdrag(struct wl_listener *listener, void *data)
LISTEN_STATIC(&drag->icon->events.destroy, destroydragicon);
}
+void
+swallow(Client *c, Client *toswallow)
+{
+ /* Do not allow a client to swallow itself */
+ if (c == toswallow)
+ return;
+
+ /* Swallow */
+ if (toswallow && !c->swallowing) {
+ c->swallowing = toswallow;
+ toswallow->swallowedby = c;
+ toswallow->mon = c->mon;
+ toswallow->mon = c->mon;
+ wl_list_remove(&c->link);
+ wl_list_insert(&c->swallowing->link, &c->link);
+ wl_list_remove(&c->flink);
+ wl_list_insert(&c->swallowing->flink, &c->flink);
+ c->bw = BORDERPX(c);
+ c->tags = toswallow->tags;
+ c->isfloating = toswallow->isfloating;
+ c->geom = toswallow->geom;
+ setfullscreen(toswallow, 0);
+ }
+
+ /* Unswallow */
+ else if (c->swallowing) {
+ wl_list_remove(&c->swallowing->link);
+ wl_list_insert(&c->link, &c->swallowing->link);
+ wl_list_remove(&c->swallowing->flink);
+ wl_list_insert(&c->flink, &c->swallowing->flink);
+ c->swallowing->tags = c->tags;
+ c->swallowing->swallowedby = NULL;
+ c->swallowing = NULL;
+ c->bw = BORDERPX(c);
+ setfullscreen(c, 0);
+ }
+}
+
void
tag(const Arg *arg)
{
@@ -2690,6 +2768,40 @@ tagmon(const Arg *arg)
setmon(sel, dirtomon(arg->i), 0);
}
+Client *
+termforwin(Client *c)
+{
+ Client *p;
+ pid_t pid;
+ pid_t pids[32];
+ size_t i, pids_len;
+
+ if (!c->pid || c->isterm)
+ return NULL;
+
+ /* Get all parent pids */
+ pids_len = 0;
+ pid = c->pid;
+ while (pids_len < LENGTH(pids)) {
+ pid = parentpid(pid);
+ if (!pid)
+ break;
+ pids[pids_len++] = pid;
+ }
+
+ /* Find closest parent */
+ for (i = 0; i < pids_len; i++) {
+ wl_list_for_each(p, &clients, link) {
+ if (!p->pid || !p->isterm || p->swallowedby)
+ continue;
+ if (pids[i] == p->pid)
+ return p;
+ }
+ }
+
+ return NULL;
+}
+
void
tile(Monitor *m)
{
@@ -2741,6 +2853,32 @@ togglefullscreen(const Arg *arg)
setfullscreen(sel, !sel->isfullscreen);
}
+void
+toggleswallow(const Arg *arg)
+{
+ Client *c, *sel = focustop(selmon);
+ if (!sel)
+ return;
+
+ if (sel->swallowing) {
+ swallow(sel, NULL);
+ } else {
+ wl_list_for_each(c, &sel->flink, flink) {
+ if (&c->flink == &fstack)
+ continue; /* wrap past the sentinel node */
+ if (VISIBLEON(c, selmon))
+ break; /* found it */
+ }
+ swallow(sel, c);
+ }
+}
+
+void
+toggleautoswallow(const Arg *arg)
+{
+ enableautoswallow = !enableautoswallow;
+}
+
void
toggletag(const Arg *arg)
{
@@ -2801,6 +2939,12 @@ unmapnotify(struct wl_listener *listener, void *data)
grabc = NULL;
}
+ if (c->swallowing) {
+ swallow(c, NULL);
+ } else if (c->swallowedby) {
+ swallow(c->swallowedby, NULL);
+ }
+
if (client_is_unmanaged(c)) {
if (c == exclusive_focus) {
exclusive_focus = NULL;
--
2.49.0
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