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Two additive primitives for C++-driven, RCSS-tunable animation:
- Host::request_frames(cb) -> FrameRequest: a per-frame callback (RAII handle)
run before tick_all each frame; the kernel schedules frames continuously while
>=1 request is alive and stops at rest. Fills the missing animation timer.
- UiSurface::transition_timing(element_id, property): reads the RCSS-authored
transition duration + easing, returning RmlUi's tween wrapped as a pure
std::function (no RmlUi types cross the contract) so an extension can drive its
own animation with hot-reloadable, designer-tunable timing/easing.
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The shader-based gradient (linear/radial) fragment shader now adds a
mean-zero triangular-PDF dither (~1 LSB of 8-bit) from a spatial pixel-position
hash before writing finalColor, so smooth ramps (e.g. an alpha fade) no longer
show quantization banding when written to the 8-bit surface buffer. Spatial,
non-temporal — no shimmer on static panels. Applies to every shader gradient.
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Forwards RmlUi Dragstart/Drag/Dragend for a named callback as DragPhase
{start,move,end} with surface-local x/y, so an extension can drive an
interactive drag from a captured ui-surface touch (the touch bus never
sees it). Mirrors bind_event's error-isolation + hot-reload handling.
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.rml basename)
The watch_file refactor (35e5d32) moved the substrate's UI-asset hot-reload onto
the shared FileWatcher but armed a BASENAME watch on the document's .rml file only.
The dock's styling lives in a separately-<link>ed dock.rcss, so editing it (the
common case) never matched the watch — asset hot-reload silently stopped working on
the real seat (no "dev hot-reload ON" line, no reload on save), while config
watching kept working. The ui_reload_surface() seam test passed because it bypassed
the real inotify->reload path.
Fix: FileWatcher::add_dir watches the document's whole DIRECTORY (so any .rml/.rcss
in it triggers the surface reload); the substrate uses it and restores the
"dev hot-reload ON (inotify watching asset dir '...')" log. Added an END-TO-END
test mirroring the dock (a doc that <link>s a separate .rcss, real inotify event,
wl_event_loop pumped, assert the document actually reloaded) — fails on the buggy
code, passes now; no more relying on the seam.
Real-seat verified: editing dock.rcss now reloads the live dock (border-radius +
background-color changes apply on save). kernel 59 cases/260 assertions green on
build + build-asan, no new suppressions. Edits confined to packages/kernel/.
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The hot-reload watcher was substrate-internal; expose it as a typed RAII primitive
any extension can use (config hot-reload is the first consumer), per "the kernel
owns the event/service bus; extensions never hold raw event-loop glue".
- New public watch.hpp: `class FileWatch` (move-only RAII; ~/reset() stop the
watch) + `Host::watch_file(path, on_change) -> FileWatch`. on_change fires on the
event-loop thread, COALESCED (one save = one call), EDITOR-SAFE (dir-watch the
basename across temp+rename), fires on CREATE of a not-yet-existing file, and is
ERROR-ISOLATED to the calling extension (carries its id; a throw disables only
that extension). UNGATED — works without UNBOX_DEV.
- New src/file_watcher.{hpp,cpp}: ONE session-wide inotify instance on the
wl_event_loop multiplexing all watched paths. The substrate's UI-asset hot-reload
was refactored onto it (no second inotify); only the substrate's *decision* to
watch UI assets stays UNBOX_DEV-gated. Created lazily on first watch; torn down
leak-clean before the loop dies.
host.hpp/kernel.md documented. kernel 58 cases/254 assertions green on build +
build-asan (incl. the inotify path), no new suppressions. Edits confined to
packages/kernel/.
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Externalize UI documents so RML/RCSS design changes need no C++ recompile — and,
in dev, no restart.
- UiSurfaceSpec::rml_path now actually loads the document from a file (path wins
over rml_inline, as documented). Resolution: absolute path as-is; relative path
against $UNBOX_ASSET_DIR, else the compile-time UNBOX_ASSET_DIR_DEFAULT (the
install data dir), else cwd. The document URL is set so its <link> RCSS / asset
refs resolve relative to the doc's own dir. Missing/unreadable file -> nullptr
(degrade, never throw).
- Dev hot-reload (gated by $UNBOX_DEV): an inotify watcher integrated into the
wl_event_loop (never blocks) watches the asset DIRS (dir-watch for IN_CLOSE_WRITE
/ IN_MOVED_TO, since editors save via temp+rename), coalesces events, and on a
change to a surface's backing .rml/.rcss reloads the document IN PLACE:
ClearStyleSheetCache + UnloadDocument + reload, preserving the surface's RmlUi
context, data model and the extension's registered bind_*/bind_list* getters
(the extension does NOT re-register), and its geometry/visibility; preview
textures are kept. A malformed file on reload is ERROR-ISOLATED — the previous
good document keeps rendering, one warning is logged, and a later good save
recovers; the session never dies.
- Test seam Server::ui_reload_surface() drives reload deterministically.
ui.hpp documents rml_path + the dev hot-reload behavior. kernel 54 cases/232
assertions green on build + build-asan (incl. the UNBOX_DEV inotify path), no new
suppressions. Edits confined to packages/kernel/.
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Two substrate capabilities the stage dock forced (both verified real-seat nested
and on the gles2 headless path):
1. Per-pixel alpha. A ui surface composited opaque, so any overlay (the dock)
occluded the toplevels beneath it. Root cause: a stray opaque
render_iface->Clear() (glClearColor 0,0,0,1) in render_surface overrode the
transparent BeginFrame clear, and EndFrame's premultiplied composite carried
the opaque base to the buffer. Fix: drop the stray Clear(); clear the OUTPUT
FBO to (0,0,0,0) once before BeginFrame. Blend was already correct
premultiplied; the substrate never sets an opaque region (now guarded by a
probe); ARGB8888 alpha survives end to end. A document whose <body> is
transparent now shows the scene through its un-painted pixels.
2. set_size resizes the render target. Previously logical-only (the slice-5
documented change-request): set_size re-laid-out the RmlUi document but did
NOT realloc the GL target, so a surface created small and grown rendered into
its original buffer (the dock, created as a 1px placeholder and grown on
minimize, was invisible). Fix: set_size now reallocs the FBO + dmabuf
swapchain/shm + EGLImage + texture + scene buffer on an ACTUAL size change
(no-op same-size, cheap; set_position still cheap). Grow and shrink both
render fully; alpha/upright-flip/blend/fence-sync preserved.
ui.hpp documents both. kernel 45 cases/182 assertions green on build + build-asan
(no new suppressions). Edits confined to packages/kernel/.
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The stage dock is one RML document rendering a variable list of slots (one per
minimized window). Adds the deferred slice-6 list-binding shape to UiSurface:
bind_list(name, count) + typed per-row fields bind_list_string/int/double/bool
(list, field, getter(row)) read as {{ row.field }} via data-for, and
bind_list_event(list, event, callback(row)) routed from data-event-*(it_index).
dirty(<list>) re-reads count + visible rows. Same error-isolation + bind-before-
first-frame contract as the scalar bindings; nested lists unsupported.
kernel suite green on build + build-asan (asan clean). Edits confined to packages/kernel/.
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The keystone for the stage dock. Proves Fork B on the real target (Mesa crocus,
HD 4400): a toplevel's pixels, rendered by the wlr GLES2 renderer into a LINEAR
ARGB8888 dmabuf, import as an EGLImage -> sampled GL texture in the sibling RMLUi
GLES 3.2 context (the slice-3 bridge run in reverse) and composite into an
<img src="unbox-preview://N"> inside a ui surface — upright, color-correct.
Public surface (ui.hpp): class Preview (source_uri/source_width/source_height/
refresh) + UiSubstrate::create_preview(wlr_scene_tree*) -> unique_ptr<Preview>
(nullptr if no GL path; never throws). Kernel-suite probes: ui_preview_import_is_dmabuf,
ui_pixel(x,y). Clean four-resource teardown (URI reg, GL texture, EGLImage, dmabuf);
refresh-after-source-destruction is UB (consumer drops Preview on unmap).
kernel 42 cases/150 assertions green on build + build-asan (asan clean, no new
suppressions). Edits confined to packages/kernel/.
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Intercept the XF86Switch_VT_1..12 keysyms before the keybinding filter and call
wlr_session_change_vt, so the user can always switch consoles while unbox runs.
Clean no-op without a session (headless/nested). Pure vt_for_keysym helper +
doctest; wlroots reached via the wlr.hpp wrapper.
Real-seat verified on the CF-AX3.
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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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The ui substrate is now the extension-facing contract (unbox/kernel/ui.hpp):
Host::ui() -> UiSubstrate::create_surface(spec) -> UiSurface with typed
scalar bindings (int/double/bool/string getters), data-event callbacks
(error-isolated per extension), dirty(), geometry/visibility — RMLUi and
GL stay kernel-private. Production sync: glFinish replaced by
EGL_KHR_fence_sync + 2-deep wlr_swapchain. ui_spike retired (orientation
guard + dirty-cycle coverage live on as substrate tests).
Input: ONE kernel routing path feeds pointer AND touch into ui surfaces
with consume-or-pass semantics and implicit-grab ownership (the consumer
of a press owns the matching release; per touch point too) — fixes
drag-release-over-ui sticking. touch-mode: state machine + debounce +
on_touch_mode_changed notification, NO visual scaling (user decision
after hardware hands-on; dp-ratio stays 1.0; see plan §2).
ext-xdg-shell: GrabMachine generalized to pointer-OR-touch interaction
source (touch titlebar drag works; originating-point pinning); fixed the
seat implicit-grab leak (suppressed release after forwarded press
swallowed all later touch-downs — pointer/touch alternation doctested);
factory renamed create(). ext-layer-shell: on_demand keyboard
interactivity via scene hit resolution. host-bin: --ui-demo extension
(temporary acceptance demo on the public contract, dies in slice 6).
User hands-on verified: same surface by mouse and finger, tap counter,
touch-mode neutrality, no click-through, drag alternation, fuzzel
on_demand. 113 doctest cases green, ASan/UBSan clean (our code), idle
RSS ≈78 MiB. Harness: UX-feel hands-on lesson (ORCHESTRATOR §2.6),
nested-run pkill/setsid notes, touch-mode glossary redefinition.
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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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Plan A verified on hardware (HD 4400/crocus): RMLUi renders into a GLES
3.2 sibling-context FBO backed by a dmabuf wlr_buffer (wlr_allocator +
EGLImage import), composited as a wlr_scene_buffer with per-frame damage.
Plan B (glReadPixels→shm) implemented and verified as runtime fallback;
auto-engages when any Plan-A precondition fails. Plan C not needed.
- Hello-world RML doc: text, data-bound frame counter, pointer input
proof (hover/:active) — verified upright on screen via screenshot after
fixing the classic FBO Y-flip (buffer-level V-flip keeps display ==
document coords for input); position-aware orientation guard added.
- Temporary spike surface: Options::ui_spike + frame-count/orientation
probes, host-bin --ui-spike flag; replaced by the real ui substrate
contract in slice 4+.
- kernel suite 6 cases / 416 assertions green; ASan/UBSan clean in our
code (Mesa leak noise + 2 benign UBSan downcast reports inside vendored
RMLUi are known); idle RSS ≈83 MiB.
- Deferred (notes/plan.md §7): glFinish→EGL fence + swapchain; dmabuf
render-format negotiation (private API in wlroots 0.20).
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touch added
Server contract (pimpl, create/run/dispatch/terminate) over a faithful
tinywl 0.20.1 port: outputs via wlr_scene, xdg-shell toplevels+popups,
focus, interactive move/resize, keyboard/pointer through wlr_cursor — plus
touch (down/up/motion/cancel/frame via seat notifies with per-point origin
tracking), which tinywl lacks. RAII Listener replaces manual wl_list_remove
bookkeeping; shutdown ordering documented in kernel.md. xkbcommon added as
a system dep. Verified: nested under labwc (output WL-1, foot mapped and
focused on GLES2) and a headless+pixman boot test in the kernel suite.
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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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