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A new standard-tier extension that composites a desktop background in the
'background' scene layer, below every window. Reads [wallpaper] from unbox.toml
(path / fit = cover|contain|stretch|center / color), hot-reloaded via watch_file
(drop + recreate an inline RCSS document with the values baked in -- avoids
fragile decorator data-binding). The surface is input_transparent so it never
steals clicks. Pure doctested config core; factory-only contract.
When no path is configured it falls back to a bundled default image
(assets/ext-wallpaper/default.jpg, auto-installed to the data dir), resolved to an
absolute path via $UNBOX_ASSET_DIR or the UNBOX_ASSET_DIR_DEFAULT compile define.
Degrades gracefully (color-only) if there is no GL path or the file is missing.
Sized to the primary output (multi-output is a documented gap).
Wiring (composition root): root meson subdir, host-bin installs it unconditionally
with the config path, unbox.toml gains a documented [wallpaper] sample.
(swaybg via ext-layer-shell's background band keeps working too.)
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NEW core unit (id "window-field", depends_on "xdg-shell"), installed by host-bin
ONLY under --rml-compositing / UNBOX_RML_COMPOSITING (default off; the classic
wlr_scene path stays the default until RML compositing is signed off on hardware).
It composites application toplevels as RCSS surface elements inside ONE ui
surface (the window field) instead of as wlr_scene nodes:
- activate(): fetch ext-xdg-shell Service (typed), create the window-field
UiSurface at SceneLayer::normal sized to the primary output, subscribe to
on_output_added + on_toplevel_mapped/unmapped/focused.
- on map: Toplevel::wl_surface() -> UiSubstrate::create_surface_element(); the
toplevel is Toplevel::hide()'d out of wlr_scene (the surface element is now the
sole compositor of its pixels; the substrate drives its frame callbacks);
appended to bind_list("wins") (live_uri = source_uri(), focused, title, app_id).
- on unmap: drop the SurfaceElement + row. on focus: flip the focused flag.
- Layout/animation are RCSS (assets/ext-window-field/field.{rml,rcss}): a wrapping
flex field where the focused window dominates and the rest tile below, animated
on a transition. No geometry from C++ (the user's contract decision).
- Keyboard focus stays ext-xdg-shell's job; pointer/touch input-back is automatic
in the kernel; this unit wires no seat calls.
Wiring (orchestrator): root meson subdir, host-bin install behind the flag +
ext_window_field_dep. Headless glue test (40 assertions): map tracks the window +
drives hide(), 2nd map, focus flip via the Alt+Tab path, unmap removes it; no-GL
degrade asserted. build + build-asan green; host-bin links; no regressions.
Known gaps (change-requests): click-to-focus a BACKGROUND window needs a kernel
"surface-element pressed -> notify owner" hook (next); wallpaper needs
ext-layer-shell surface exposure (Wave 3b).
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- host-bin: install the `unbox` binary (install: true) so `meson install`
(and the package) ship /usr/bin/unbox. Assets already install via the
top-level install_subdir to /usr/share/unbox.
- ext-keybindings: force the toml++ subproject to default_library=static.
Its wrapped meson.build hardcodes default_library=shared, which made the
installed binary NEED libtomlplusplus.so.3 at runtime (only resolvable in
the dev tree via LD_LIBRARY_PATH). Static-linking bakes it in.
- packaging/PKGBUILD: builds the working tree (reuses synced subprojects, no
network), plain meson (no devtools needed), options=(!debug), and ALWAYS
configures a fresh build dir — a reused/stale dir silently drops subproject
option overrides (this is what reintroduced the shared-toml regression).
- packaging/start-unbox: dbus-run-session -- unbox (mirrors start-labwc.sh).
- packaging/build-remote.sh: rsync the tree to the fast box (builder),
makepkg there, ferry the .pkg.tar.zst back, pacman -U here. Self-verifies
the packaged + installed binary has no unresolved/shared-toml dependency
(extracting to a real file — readelf can't read a non-seekable pipe).
Runtime NEEDED is now only system libs (wlroots-0.20, wayland, xkbcommon,
freetype, EGL, GLESv2, libstdc++/m/gcc_s/c) — installs + runs on the CF-AX3.
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ext-stage-dock activate() now wires the full static pipeline: track toplevels via
the ext-xdg-shell Service; Super+M (stopgap keybinding) minimizes the focused
window -> snapshot a Preview from its scene_tree(), push a slot, hide() the live
node, refocus another window; the dock is one overlay UiSurface rendering the
slots via the b2 list bindings (data-for over {preview src, title}); tapping a
slot fires bind_list_event -> show()+focus() the window and drop its slot/Preview.
Storing the Toplevel* across minimize is safe because hide() keeps it mapped;
slots are dropped on on_toplevel_unmapped. Teardown is reverse-declaration-order
(subscriptions first, surface before slots), asan-clean.
host-bin installs ext-stage-dock (standard, depends_on xdg-shell; hidden until it
holds a minimized window). Headless glue test (real in-process xdg client) proves
the model + scene-node enable bit true->false->true, slots 0->1->0. RML carries
dock/slot classes as d1's RCSS animation hooks. Stopgaps: Super+M (to migrate into
an ext-keybindings action + a stage-dock Service post-d1); favicon deferred
(needs an XDG icon-theme dep — to surface to the user).
10/10 suites green on build + build-asan. Visual/tap path is real-seat (pending).
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exports WAYLAND_DISPLAY
ext-keybindings (new core ext) reads unbox.toml: tap-Super spawns fuzzel,
Alt+Tab/Alt+Shift+Tab rotate focus across all toplevels, plus Alt+F1 and
Ctrl+Alt+Backspace (quit). ext-xdg-shell's hardcoded keybinds removed
(migrated to the toml).
Kernel setenv()s WAYLAND_DISPLAY at startup so extension-spawned clients
connect to unbox, not the launching session — fixes fuzzel "no monitors"
on the real seat.
build + build-asan green: third-party Mesa/EGL/DRM + vendored-RmlUi sanitizer
noise suppressed (suppressions/), our code stays leak-checked; a real
libwayland leak in the layer-shell client test fixed.
Harness: spawn-env + sanitizer-noise rules, diagnose-real-seat skill,
GLOSSARY keybinding/action/tap-binding. Real-seat verified on the CF-AX3.
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extensions
The kernel now names NO concrete feature. It owns: the extension host
(install/topological activate, missing-dep/cycle = startup error), the
typed Event/Filter bus (error-isolated: a throwing extension is disabled,
never the session; RAII Subscriptions), the Host API (per-extension
facade: borrows, scene layers, event catalogue, typed services), the
public RAII Listener, and a typed surface→scene-tree registry
(Host::host_surface/scene_tree_for) that replaced the untyped
wlr_surface.data convention both extensions flagged.
- ext-xdg-shell (core): toplevel/popup lifecycle, focus-on-map,
click/tap-to-focus, pointer/touch routing incl. button+axis (the
kernel only moves the cursor and emits — a contract-doc lie caught by
user hands-on), interactive move/resize via pure GrabMachine (fixes
the request-arrives-after-release race: grab requires request ∧
button-down, release always ends it), Alt+F1 cycle,
Ctrl+Alt+Backspace terminate (labwc's default A-Escape=Exit killed
the dev session once — never again; see nested-run skill).
- ext-layer-shell (core): wlr-layer-shell v1 (proto v5) for external
clients; pure doctest-hard arrangement core; fuzzel verified visually
nested (fix: seed outputs from output_layout at activate — events-only
tracking missed pre-activation outputs; plus a scene-node double-free).
- First protocol codegen: vendored wlr-layer-shell XML + wayland-scanner
server-header propagated through kernel_dep; wlr.hpp grew a
namespace→_namespace keyword fix for the generated header.
- Glossary: 'scene layer' (user-approved). New rules earned:
parallel-wave-builds, contract-docs.
- User hands-on verified: typing, click-to-focus, drag-select, scroll,
titlebar drag-move (slow + flick), Alt+F1, fuzzel + arrows, touch tap,
Ctrl+Alt+Backspace. 68 doctest cases green, ASan/UBSan clean (our
code), idle RSS ≈73 MiB.
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vendored
Root meson.build (C++23, WLR_USE_UNSTABLE, ccache-detected) with RMLUi 6.2
as a wrap-file tarball built through the cmake module (no git submodules —
settled decision) and doctest 2.5.2 from wrapdb. kernel unit: extern-"C"
wlr.hpp wrapper (with the C99 [static N] array-param workaround documented
in kernel.md), slice-1 probe contract, doctest suite (1/1 green). host-bin:
composition root printing versions, exit 0. tasks.md slice 1 done.
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