steam-frame/DeeJanuz--frametop
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Show floating windows as panels of their own

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ft-screens makes a panel for each spare output (frametop.float.N), hidden
until ft-floatd floats a window on it. The panel shows only the window's
rectangle of the buffer at the density of the screen it came from, its
popups and dialogs get small panels over it, pressing its title bar
carries it while KWin's pointer stays put, the corner tab resizes the
window in pixels, and two more buttons close it and put it back on the
desktop. The session adds FLOAT_SLOTS spare outputs to KWin and starts
ft-floatd; ft-layout arranges only the screens' outputs, and the pointer
helper treats the new panels like screens. Not yet tried in the headset.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
DeeJanuzandClaude Opus 5.5 committed 2026-09-29 23:26:20 -06:00
1 parent 87a402c68d
commit c2e5e861c8
9 files changed
+480 -75
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screens/compositor.c
+24 -10
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@@ -13,13 +13,15 @@
// scale first ("scale <screen> <s>", from ft-layout).
//
// Usage: ft-screens [--socket NAME] [--control NAME] [--no-vr] [--screen WxH@METRES]...
// [-- COMMAND ARGS...]
// [--spares N] [-- COMMAND ARGS...]
// --socket Wayland socket name in $XDG_RUNTIME_DIR (default ft-screens-0)
// --control the control socket's abstract name (default ft_screens)
// --no-vr run without SteamVR, for tests next to the running desktop: no panels, no
// input, and nothing sent to the input relay. Commands still work, and
// "toplevels" shows what KWin opened.
// --screen one per screen, in KWin's order (default: 3440x1440@2.4)
// --spares KWin's outputs after the screens: spares for floating windows (ft-floatd
// turns them on and sizes them; see docs/floating-windows.md)
// COMMAND run with WAYLAND_DISPLAY set to our socket (e.g. the Frametop session)
// Runs in the dev container (wlroots 0.20); KWin connects from the host.
#define _GNU_SOURCE
@@ -57,7 +59,7 @@
#include "vr.h"
#define MAX_SCREENS 8
#define MAX_SCREENS 24 // screens and spare outputs
struct config {
int width, height;
@@ -97,7 +99,8 @@ struct server {
struct screen *screens[MAX_SCREENS];
struct config config[MAX_SCREENS];
double scale[MAX_SCREENS]; // KWin's scale for each screen (panel pixels per logical unit)
int n_config, n_screens;
int n_config, n_screens; // n_config: the screens; the outputs after them are spares
int spares;
struct wl_list buffers; // tracked_buffer
struct wl_event_source *tick;
struct screen *pointer_focus;
@@ -145,7 +148,8 @@ static void screen_commit(struct wl_listener *l, void *data) {
struct wlr_xdg_surface *xdg = sc->toplevel->base;
if (xdg->initial_commit) {
// First commit: tell KWin the size of this screen.
const struct config *c = &sc->server->config[sc->index < sc->server->n_config ? sc->index : 0];
const struct config spare = {640, 480, 0.5}; // until ft-floatd sizes it
const struct config *c = sc->index < sc->server->n_config ? &sc->server->config[sc->index] : &spare;
wlr_xdg_toplevel_set_size(sc->toplevel, c->width, c->height);
wlr_xdg_toplevel_set_activated(sc->toplevel, true);
if (sc->decoration)
@@ -205,7 +209,9 @@ static void screen_destroy(struct wl_listener *l, void *data) {
// after it while that output is off.
static void screen_title(struct wl_listener *l, void *data) {
struct screen *sc = wl_container_of(l, sc, set_title);
wlr_log(WLR_INFO, "screen %d: \"%s\"", sc->index + 1, sc->toplevel->title ? sc->toplevel->title : "");
const char *title = sc->toplevel->title ? sc->toplevel->title : "";
wlr_log(WLR_INFO, "screen %d: \"%s\"", sc->index + 1, title);
if (sc->index >= sc->server->n_config) ft_vr_float_output(sc->index, !strstr(title, "Output disabled"));
}
static void new_toplevel(struct wl_listener *l, void *data) {
@@ -222,9 +228,15 @@ static void new_toplevel(struct wl_listener *l, void *data) {
sc->index = index;
sc->toplevel = toplevel;
s->screens[index] = sc;
const struct config *c = &s->config[index < s->n_config ? index : 0];
wlr_log(WLR_INFO, "screen %d: KWin window, %dx%d, %.2f m wide", index + 1, c->width, c->height, c->metres);
ft_vr_screen_create(index, c->metres, s->n_config > index + 1 ? s->n_config : index + 1);
if (index >= s->n_config) {
wlr_log(WLR_INFO, "screen %d: KWin window, a spare output (floating window %d)", index + 1,
index - s->n_config + 1);
ft_vr_float_create(index, index - s->n_config + 1);
} else {
const struct config *c = &s->config[index];
wlr_log(WLR_INFO, "screen %d: KWin window, %dx%d, %.2f m wide", index + 1, c->width, c->height, c->metres);
ft_vr_screen_create(index, c->metres, s->n_config);
}
sc->commit.notify = screen_commit;
wl_signal_add(&toplevel->base->surface->events.commit, &sc->commit);
sc->destroy.notify = screen_destroy;
@@ -537,6 +549,8 @@ int main(int argc, char **argv) {
socket_name = argv[++i];
} else if (strcmp(argv[i], "--control") == 0 && i + 1 < argc) {
control_name = argv[++i];
} else if (strcmp(argv[i], "--spares") == 0 && i + 1 < argc) {
s.spares = atoi(argv[++i]);
} else if (strcmp(argv[i], "--no-vr") == 0) {
s.vr = false;
} else if (strcmp(argv[i], "--screen") == 0 && i + 1 < argc && s.n_config < MAX_SCREENS) {
@@ -554,7 +568,7 @@ int main(int argc, char **argv) {
} else {
fprintf(stderr,
"usage: %s [--socket NAME] [--control NAME] [--no-vr] [--screen WxH@METRES]... "
"[-- COMMAND ARGS...]\n",
"[--spares N] [-- COMMAND ARGS...]\n",
argv[0]);
return 2;
}
@@ -599,7 +613,7 @@ int main(int argc, char **argv) {
}
char path[256];
snprintf(path, sizeof path, "%s/%s", getenv("XDG_RUNTIME_DIR") ? getenv("XDG_RUNTIME_DIR") : "/tmp", socket_name);
wlr_log(WLR_INFO, "listening on %s; %d screen(s) configured", path, s.n_config);
wlr_log(WLR_INFO, "listening on %s; %d screen(s) configured, %d spare(s)", path, s.n_config, s.spares);
const int control = open_control_socket(control_name);
if (control < 0) return 1;