russell@unturf.com
df154b9a56
Tab switching during a long-running eval used to silently abandon
the calc — output stopped streaming, no snapshot, nothing to come
back to. Now setActiveTab pauses the outgoing tab's eval (and
optionally portal-saves the env), terminates the worker, and on
re-entry hydrates + re-fires the original input.
Pieces:
* serve-coop.py + make serve-repl — dev server that emits
Cross-Origin-Opener-Policy: same-origin and
Cross-Origin-Embedder-Policy: require-corp so SharedArrayBuffer
is constructable in the browser. Same headers production needs.
* C tier eval-loop pause poll — c/eval.c grows lumbda_check_pause(),
guarded by #ifdef LUMBDA_WASM. Called at the top of leval()'s
while(1); masked to every 1024th iteration so the polling cost
stays under noise floor. When the JS-library import
js_lumbda_pause_requested returns 1, lisp_error("paused")
longjmps out so module-global env survives intact for the
portal-snapshot that follows.
* SAB plumbing — main thread allocates new SharedArrayBuffer(4),
hands it through worker config → runner.setPauseFlag →
lumbda-c.loader.setPauseFlag → globalThis._lumbdaCPauseFlag.
Atomics.store / Atomics.load on index 0 is the signalling
channel. Falls back to null when COOP/COEP isn't isolated, in
which case pause degrades to a hard worker.terminate().
* autoPauseTab() — on setActiveTab away, snapshots the tier
(C tier with SAB) or hard-cancels (other tiers / no SAB),
stashes tab.autoPause = {tier, blob, inputSrc, savedAt},
terminates the workers so the heap is reclaimed.
* autoResumeTab() — on setActiveTab into a tab with autoPause,
reboots the tier, hydrates MEMFS, runs (portal-load! ...), then
re-fires the original input via sendInput so the eval restarts
from the saved state. Asm + Python paths re-run from scratch
until their poll sites land.
Also closes two UX papercuts from fox: chip ⇣ export icon bumped
from 0.85em muted to 1em green so it's actually discoverable; the
scope toggle now reads "scope: this tab" / "scope: all tabs" so the
button label describes the state rather than a target.
390 lines
11 KiB
CSS
390 lines
11 KiB
CSS
/* lumbda repl — grid-only layout. Inherits palette + base from style.css. */
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body.repl {
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/* Plain document flow — no min-height, no overflow. The page scrolls
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* naturally when content exceeds the viewport; the prompt-bar uses
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* position: sticky so it stays glued to the bottom of the viewport in
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* that case, and sits right under the transcript otherwise. */
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}
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/* ─── Lock screen overlay ──────────────────────────────────────── */
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.lock-screen {
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position: fixed; inset: 0; z-index: 1000;
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display: grid;
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place-items: center;
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background: rgba(15, 17, 21, 0.85);
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backdrop-filter: blur(4px);
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}
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.lock-card {
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background: var(--pane-bg);
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border: 1px solid var(--rule);
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border-radius: 6px;
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padding: 1.5rem 2rem;
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max-width: 28rem;
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width: 90%;
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display: grid;
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gap: 0.4rem;
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}
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.lock-card h2 {
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margin: 0 0 0.1rem;
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font-family: 'chunkfive', Georgia, serif;
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font-size: 1.4rem;
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color: var(--green);
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font-weight: normal;
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}
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.lock-card p {
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margin: 0;
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font-size: 0.85rem;
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color: var(--muted);
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line-height: 1.5;
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}
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.lock-card input[type=password] {
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width: 100%;
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padding: 0.5rem 0.7rem;
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margin: 0.4rem 0 0;
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background: var(--code-bg);
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color: var(--fg);
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border: 1px solid var(--rule);
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border-radius: 3px;
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font-family: var(--mono);
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font-size: 0.95rem;
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}
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.lock-card input[type=password]:focus {
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outline: none;
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border-color: var(--green);
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}
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.lock-row {
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display: grid;
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grid-template-columns: auto auto;
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gap: 0.6rem;
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margin-top: 0.5rem;
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justify-content: start;
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}
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.lock-row button {
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font-family: var(--mono);
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font-size: 0.85em; font-weight: 600;
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padding: 0.45rem 1.1rem;
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border-radius: 3px;
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cursor: pointer;
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border: 1px solid var(--green);
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}
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.lock-row .primary { background: var(--green); color: var(--bg); }
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.lock-row .secondary { background: transparent; color: var(--green); }
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.lock-row .primary:hover { filter: brightness(1.1); }
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.lock-row .secondary:hover { background: var(--code-bg); }
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.lock-note {
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margin: 0.4rem 0 0;
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color: var(--err);
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font-size: 0.8rem;
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min-height: 1.2em;
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}
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.lock-explain {
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margin: 0.4rem 0 0;
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font-size: 0.78rem;
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color: var(--muted);
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}
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.lock-explain summary {
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cursor: pointer;
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color: var(--green);
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user-select: none;
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}
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.lock-explain summary:hover { text-decoration: underline; }
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.lock-explain ul {
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margin: 0.5rem 0 0;
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padding-left: 1.1rem;
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display: grid;
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gap: 0.3rem;
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}
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.lock-explain li { line-height: 1.45; }
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.lock-explain code {
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background: var(--code-bg);
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padding: 0 0.2em;
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border-radius: 2px;
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font-size: 0.92em;
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}
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.lock-explain a {
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color: var(--green);
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text-decoration: none;
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}
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.lock-explain a:hover { text-decoration: underline; }
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.lock-explain strong { color: var(--fg); }
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/* ─── Tab bar ──────────────────────────────────────────────────── */
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.tabbar {
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/* Sticks to the top of the viewport so it stays visible after the
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* header scrolls away — keeps the active-session controls reachable
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* even after a long transcript pushes them off-screen. */
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position: sticky;
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top: 0;
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z-index: 40;
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display: grid;
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/* tabs · new-tab · spacer · heap-pressure (injected by repl.js) ·
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* reboot · clear · cancel · lock — 8 cells. Extend if the toolbar
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* grows; CSS Grid drops trailing children onto a new row, which is
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* how lock used to wrap. */
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grid-template-columns: auto auto 1fr auto auto auto auto auto;
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gap: 0.3rem;
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align-items: center;
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padding: 0.4rem 0.4rem;
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margin: 0 0 0.4rem;
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background: var(--code-bg);
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border-bottom: 1px solid var(--rule);
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}
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.tabs {
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display: grid;
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grid-auto-flow: column;
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grid-auto-columns: max-content;
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gap: 0.3rem;
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overflow-x: auto;
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}
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.tab {
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background: var(--pane-bg);
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border: 1px solid var(--rule);
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padding: 0.25rem 0.6rem;
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border-radius: 3px 3px 0 0;
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font-size: 0.85em;
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cursor: pointer;
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display: inline-grid;
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grid-template-columns: auto auto;
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gap: 0.3rem;
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align-items: center;
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white-space: nowrap;
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}
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.tab.active {
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background: var(--code-bg);
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border-bottom-color: var(--code-bg);
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color: var(--green);
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}
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.tab .tab-close {
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opacity: 0.5;
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cursor: pointer;
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padding: 0 0.2rem;
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}
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.tab .tab-close:hover { opacity: 1; color: var(--err); }
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.tabbar .ghost {
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background: transparent;
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border: 1px solid var(--rule);
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color: var(--muted);
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font-family: var(--mono);
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font-size: 0.8em;
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padding: 0.2rem 0.6rem;
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border-radius: 3px;
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cursor: pointer;
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}
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.tabbar .ghost:hover:not(:disabled) {
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border-color: var(--green); color: var(--green);
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}
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.tabbar .ghost:disabled { opacity: 0.4; cursor: default; }
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.tabbar .heap-pressure {
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color: var(--muted);
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font-size: 0.72em;
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font-family: var(--mono);
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white-space: nowrap;
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padding: 0 0.4rem;
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}
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/* Portal bar — REPL save/resume controls. Sits between tabbar and
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* transcript. Hidden when the active tier has no portal support yet
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* (the asm-wat tier stays grey). */
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.portal-bar {
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display: grid;
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/* label · save · import · scope · chips-row */
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grid-template-columns: auto auto auto auto 1fr;
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gap: 0.4rem;
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align-items: center;
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padding: 0.2rem 0.5rem;
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background: var(--code-bg);
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border-bottom: 1px solid var(--rule);
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font-size: 0.78em;
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font-family: var(--mono);
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}
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.portal-bar .portal-label {
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color: var(--muted);
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}
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.portal-bar .portal-chips {
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display: grid;
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grid-auto-flow: column;
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grid-auto-columns: max-content;
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gap: 0.3rem;
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overflow-x: auto;
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}
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.portal-chips .chip {
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display: inline-grid;
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/* label · ⇣ download · × delete */
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grid-template-columns: auto auto auto;
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gap: 0.3rem;
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align-items: center;
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background: var(--pane-bg);
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border: 1px solid var(--rule);
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border-radius: 3px;
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padding: 0.1rem 0.4rem;
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color: var(--green);
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cursor: pointer;
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white-space: nowrap;
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}
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.portal-chips .chip:hover { border-color: var(--green); }
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.portal-chips .chip-global {
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/* Cross-tab snapshots get a muted accent so they read as "borrowed
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* from another tab" rather than belonging here. */
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border-style: dashed;
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opacity: 0.85;
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}
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.portal-chips .chip .chip-export,
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.portal-chips .chip .chip-close {
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/* Bumped from 0.85em + muted because fox couldn't find the export
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* icon on the chip. Now sized at parity with the label and tinted
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* with the chip's accent so the action affordance reads as a
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* sibling of the name, not a footnote. */
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font-size: 1em;
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cursor: pointer;
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padding: 0 0.15rem;
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}
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.portal-chips .chip .chip-export { color: var(--green); }
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.portal-chips .chip .chip-export:hover { filter: brightness(1.4); }
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.portal-chips .chip .chip-close { color: var(--muted); }
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.portal-chips .chip .chip-close:hover { color: var(--err); }
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/* ─── Transcript ───────────────────────────────────────────────── */
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/* The REPL stream is the page's only scroller. Header stays pinned;
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* tabs, transcript, and prompt all flow inside this one scroller so
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* fresh sessions show the prompt up near the top and it drifts down
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* with each new entry. */
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.repl-stream {
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background: var(--code-bg);
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display: grid;
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grid-template-rows: auto auto auto;
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align-content: start;
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}
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.transcript {
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/* Same horizontal inset as the active prompt-bar so prior λ> sigils
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* line up with the live one. No max-width / margin: auto here — a
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* centered transcript on wide viewports would mis-align with the
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* left-flush prompt-bar. Long lines wrap inside the entry instead. */
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padding: 0.4rem 0.4rem 0;
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font-family: var(--mono);
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font-size: 0.92em;
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line-height: 1.45;
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}
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.transcript .entry {
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margin: 0;
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padding: 0;
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}
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.transcript .entry .prompt-line {
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color: var(--green);
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white-space: pre-wrap;
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word-break: break-word;
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}
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.transcript .entry .prompt-line .sigil {
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display: inline-block;
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width: 3ch;
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opacity: 0.7;
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}
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.transcript .entry .tier-output {
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display: block;
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padding: 0;
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color: var(--fg);
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}
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.transcript .entry .tier-result {
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white-space: pre-wrap;
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word-break: break-word;
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padding-left: 3ch; /* line up under "λ> " */
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}
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.transcript .entry .tier-meta {
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color: var(--muted);
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font-size: 0.78em;
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margin-left: 0.6em;
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user-select: none;
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}
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.transcript .entry .tier-meta::before {
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content: "; "; /* render as a lisp comment */
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color: var(--muted);
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opacity: 0.6;
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}
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.transcript .entry.error .tier-result { color: var(--err); }
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/* Error line appended after partial streamed output — keeps the
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* lines that already showed and tints just the trailing error. */
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.transcript .tier-result .err-line { color: var(--err); }
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.transcript .entry + .entry { margin-top: 0.4rem; }
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/* ─── Prompt bar ───────────────────────────────────────────────── */
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.prompt-bar {
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/* Flows directly under the last transcript entry — connected, no gap.
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* Sticks to the viewport bottom once the page scrolls past it. */
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position: sticky;
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bottom: 0;
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z-index: 50;
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display: grid;
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grid-template-columns: auto 1fr auto auto;
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gap: 0.4rem;
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/* Baseline-align: sigil glyph sits on the textarea's first-line
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* baseline whether the textarea is 1 row or 40. Center alignment
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* with top-aligned sigil drifts visibly off the input baseline on
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* single-line input; top alignment without baseline drifts the
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* sigil ABOVE the input. Baseline tracks the first line in either
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* case, which is what the eye expects from a prompt. */
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align-items: baseline;
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padding: 0.3rem 0.4rem 0.5rem;
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background: var(--code-bg);
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}
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.prompt-bar .prompt-sigil {
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color: var(--green);
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font-weight: 600;
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/* Match textarea font metrics so the baselines actually line up;
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* a larger sigil font would push its baseline higher than the
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* textarea's by the cap-height difference. */
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font-family: var(--mono);
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font-size: 0.92em;
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line-height: 1.4;
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}
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.prompt-bar textarea {
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resize: none;
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background: var(--code-bg);
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border: none;
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color: var(--fg);
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padding: 0.25rem 0;
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font-family: var(--mono);
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font-size: 0.92em;
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/* Pin line-height so multi-line content + sigil baseline alignment
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* stay predictable. Browser default for textarea is 'normal' which
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* varies per font; matching .prompt-sigil keeps both baselines on
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* the same grid line. */
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line-height: 1.4;
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min-height: 1.5em;
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max-height: 30vh;
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min-width: 0;
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}
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.prompt-bar textarea:focus { outline: none; border-color: var(--green); }
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.prompt-bar select {
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background: var(--code-bg);
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border: 1px solid var(--rule);
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color: var(--fg);
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padding: 0.35rem 0.5rem;
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font-family: var(--mono);
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font-size: 0.85em;
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border-radius: 3px;
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}
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.prompt-bar button.primary {
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background: var(--green);
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color: var(--bg);
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border: 1px solid var(--green);
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padding: 0.4rem 1rem;
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font-family: var(--mono);
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font-weight: 600;
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border-radius: 3px;
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cursor: pointer;
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}
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.prompt-bar button.primary:hover { filter: brightness(1.1); }
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.prompt-bar button.primary:disabled { opacity: 0.4; cursor: wait; }
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kbd {
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font-family: var(--mono);
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background: var(--code-bg);
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padding: 0.05em 0.3em;
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border: 1px solid var(--rule);
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border-radius: 2px;
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font-size: 0.85em;
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}
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