Press n or j to go to the next uncovered block, b, p or k for the previous block.
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10x 10x 10x 10x 10x 10x 10x 10x 10x 2x 1x 1x 1x 7x 7x 7x 7x 7x 7x 7x 7x 2x 5x 1x 5x 5x 5x 5x 1x 5x 4x 4x 152x 152x 146x 146x 146x 233x 233x 404x 202x 468x 468x 450x 450x 450x 468x 468x 468x 110x 508x 508x 508x 508x 508x 1016x 1524x 508x 508x 508x 508x 508x 508x 41x 41x 467x 394x 394x 394x 394x 394x 394x 394x 394x 394x 394x 394x 73x 73x 73x 73x 73x 73x 73x 73x 73x 73x 73x 73x 73x 73x 73x 508x 508x 75x 75x 75x 75x 508x 508x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 245x 6x 239x 202x 202x 202x 202x 202x 202x 37x 37x 37x 37x 37x 37x 37x 37x 37x 37x 37x 37x 245x 245x 753x 1488x 753x 753x 260x 260x 258x 258x 258x 138x 138x 414x 258x 258x 11x 11x 11x 8x 8x 8x 8x 11x 11x 1x 2x 2x 1x 1x 1x 1x | import { dfsCatalogue } from "../disc.js";
import { replaceOrAddExtension } from "../archive.js";
import { FloatingPanel } from "./floating-panel.js";
import { Centred, EndEdge } from "./panel-layout.js";
import { tracksLabel, tracksPerStepOf } from "./drives.js";
import {
Sources,
compareForQuery,
describeBrowserDisc,
matchesQuery,
sourceName,
sourceOf,
} from "./media-catalogue.js";
import { errorText, reportLoadFailure } from "./reporting.js";
import { guessDiscTypeFromName } from "../fdc.js";
import { findModel } from "../models.js";
import { toast } from "./toast.js";
import { noteFeature } from "./analytics.js";
const MinPanelSize = { w: 420, h: 240 };
const CounterDigits = 3;
const CounterDivisions = 10 ** CounterDigits;
// Beyond this the list is a scroll nobody reads; the search box narrows it.
const MaxRows = 100;
// How long the search box stays highlighted where motion is off, and a backstop where it is on.
const NudgeMs = 2000;
// The drive almost nobody uses, folded to one line until it holds something or is aimed at.
const FoldableDrive = 1;
const targetFrom = (slot) => (slot === "tape" ? "tape" : Number(slot));
/**
* What a disc going into `driveIndex` does. Only drive 0 boots, and only on a machine that boots from a disc
* (`bootable`): as the Autoboot tick says, the other way with Shift, or as `boot` says whatever the tick.
* `urlAutoboot` is what the URL's autoboot becomes, undefined to leave it alone; it says the load booted only
* where the URL names the disc (`inUrl`).
*/
export function bootDecision({ driveIndex, bootable, ticked, shift = false, boot, inUrl = false }) {
if (driveIndex !== 0 || !bootable) return { boots: false, urlAutoboot: undefined };
const boots = boot ?? shift !== ticked;
return { boots, urlAutoboot: boots && inUrl };
}
/** The keys that load from the search box, and what they do, aimed at `target`. */
function hintKeys(target, bootable, ticked) {
if (target === "tape") return [["Enter", "loads into the deck"]];
if (!bootable) return [["Enter", `loads into drive ${target}`]];
const boots = (shift) => bootDecision({ driveIndex: target, bootable, ticked, shift }).boots;
if (!boots(false) && !boots(true)) return [["Enter", `loads into drive ${target}, which does not boot`]];
return [
["Enter", boots(false) ? `boots from drive ${target}` : `loads into drive ${target}`],
["Shift+Enter", boots(true) ? "loads and boots" : "loads without booting"],
];
}
// What fits on a line of the LED panel: the name without its folder or extension, cut in the
// middle when it is still too long, so both the start and the end of it survive.
const ReadoutChars = 12;
const ReadoutTailChars = 4;
export function shortName(name) {
const bare = name
.split("/")
.pop()
.replace(/\.[a-z0-9]+$/i, "");
if (bare.length <= ReadoutChars) return bare;
return `${bare.slice(0, ReadoutChars - ReadoutTailChars - 1)}…${bare.slice(-ReadoutTailChars)}`;
}
const counterDigits = (count) => String(count).padStart(CounterDigits, "0");
const otherDrive = (driveIndex) => 1 - driveIndex;
// The BBC addresses the other side of a drive's disc as drive N+2.
const upperSideOf = (driveIndex) => driveIndex + 2;
const failureWords = (failed) =>
failed ? `could not load ${failed.descriptor.title}: ${errorText(failed.error)}` : "";
const loadingWords = (busy) => `loading ${busy.title} from ${sourceName(busy.source)}…`;
/** A source's page about an entry, as a URL, if it is one a browser may be sent to; the source is not trusted. */
function webPage(url) {
if (!url) return null;
try {
const page = new URL(url);
return page.protocol === "https:" || page.protocol === "http:" ? page : null;
} catch {
return null;
}
}
/**
* The media window: two drive fronts and a cassette deck showing what the
* machine holds, with the controls that belong on them (eject, the 40/80
* switch, save, the disc surface, the tape transport); under them one
* searchable list of everything every source offers; and the one-line
* readouts in the LED panel that open it.
*/
export class MediaWindow {
constructor({
media,
drives,
processor,
model,
loop,
visualiser,
autoboot,
driveSource,
machineSwitch,
arrangement,
}) {
this.media = media;
this.slots = media.slots;
this.drives = drives;
this.processor = processor;
this.model = model;
this.visualiser = visualiser;
this.autoboot = autoboot;
this.driveSource = driveSource;
this.machineSwitch = machineSwitch;
this.panel = document.getElementById("media-panel");
this.floating = new FloatingPanel({
panel: this.panel,
id: "media",
title: null,
menuGroup: null,
group: null,
place: () => ({ x: Centred, y: EndEdge }),
minSize: MinPanelSize,
arrangement,
});
this.summary = document.getElementById("media-summary");
this.bays = [0, 1].map((driveIndex) => this.buildBay(driveIndex));
this.deck = this.buildDeck();
this.list = this.buildList();
this.readouts = Object.fromEntries(
[...document.querySelectorAll("#leds .slot-readout")].map((el) => [el.dataset.slot, el]),
);
this.counterBase = 0;
this.lastCounter = null;
this.target = 0;
this.asked = [null, null];
for (const opener of document.querySelectorAll(".media-window-open"))
opener.addEventListener("click", (e) => {
e.preventDefault();
const { slot } = opener.dataset;
if (slot === undefined) this.open();
else this.openFor(targetFrom(slot));
});
this.floating.addEventListener("open", () => {
this.list.searchNoted = false;
this.refreshList();
});
this.floating.addEventListener("close", () => (this.list.newDiscForm.hidden = true));
// A slot that gains something unfolds; the rows say which slot holds them.
this.slots.addEventListener("changed", (e) => {
const { slot } = e.detail;
if (slot.isDeck) {
if (slot.media !== this.deck.shown) this.counterBase = 0;
this.deck.shown = slot.media;
if (slot.media) this.showDeck(true);
this.renderDeck();
} else {
if (slot.media && slot.index === FoldableDrive) this.showDrive(true);
this.renderDrive(slot.index);
this.visualiser.redraw();
}
this.renderList();
});
drives.addEventListener("tracks-changed", (e) => this.renderDrive(e.detail.driveIndex));
// A file opened while the window is up joins the list; closed, the next open lists it anyway.
media.addEventListener("files-changed", () => {
if (this.isOpen) this.refreshList();
});
loop.addEventListener("tick", () => this.tick());
this.pageListeners = new AbortController();
this.bindDropZone();
if (!this.model.hasDiscDrives) {
this.panel.querySelector(".media-case").hidden = true;
for (const button of this.list.into.querySelectorAll('[data-target]:not([data-target="tape"])'))
button.hidden = true;
this.list.newDisc.hidden = true;
this.list.connect.hidden = true;
}
this.list.autoboot.closest("label").hidden = !this.bootable;
this.showDeck(!this.model.hasDiscDrives);
this.showDrive(false);
this.showList(true);
this.setTarget(this.defaultTarget);
this.renderAll();
}
/** The Atom has no SHIFT+BREAK: a reset leaves it at its prompt, with Atom DOS not even linked in. */
get bootable() {
return !this.model.isAtom;
}
/** Whether `d` can boot where it would run: on the machine it switches to, if this one cannot run it. */
bootableFor(d) {
if (!d || this.machineSwitch.satisfies(d) || d.requires.model === undefined) return this.bootable;
return !findModel(d.requires.model).isAtom;
}
get defaultTarget() {
return this.model.hasDiscDrives ? 0 : "tape";
}
get isOpen() {
return this.floating.isOpen;
}
/**
* The whole page takes a dropped file: a disc goes into the aimed drive, a tape into the
* deck, a save state is restored. An overlay says so while a file is over the page. An element
* with `data-drop-into` takes its own drops, and the overlay says what it does with them.
*/
bindDropZone() {
const zone = document.getElementById("drop-zone");
const what = zone.querySelector(".drop-zone-what");
const words = zone.querySelector(".drop-zone-into");
const ownWhat = what.textContent;
const claimant = (e) => (e.target instanceof Element ? e.target.closest("[data-drop-into]") : null);
const describe = (e) => {
const claimed = claimant(e);
what.textContent = claimed?.dataset.dropWhat ?? ownWhat;
words.textContent =
claimed?.dataset.dropInto ??
(this.model.hasDiscDrives ? `a disc goes into ${this.targetName}` : "a tape goes in the deck");
};
// dragenter and dragleave fire for every element crossed, so the depth says when the page is left.
let depth = 0;
const hasFiles = (e) => [...(e.dataTransfer?.types ?? [])].includes("Files");
const { signal } = this.pageListeners;
document.addEventListener(
"dragenter",
(e) => {
if (!hasFiles(e)) return;
e.preventDefault();
if (depth++ === 0) zone.hidden = false;
describe(e);
},
{ signal },
);
document.addEventListener(
"dragover",
(e) => {
e.preventDefault();
// Anything but a file, a link say, would replace the page if it were let drop.
if (!hasFiles(e)) {
e.dataTransfer.dropEffect = "none";
return;
}
e.dataTransfer.dropEffect = "copy";
describe(e);
},
{ signal },
);
document.addEventListener(
"dragleave",
(e) => {
Iif (!hasFiles(e)) return;
if (--depth === 0) zone.hidden = true;
},
{ signal },
);
document.addEventListener(
"drop",
async (e) => {
e.preventDefault();
if (!hasFiles(e)) return;
depth = 0;
zone.hidden = true;
if (claimant(e)) return;
const file = e.dataTransfer.files[0];
Iif (!file) return;
await this.openFile(file, "Dropped", "drop");
},
{ signal },
);
}
/** Takes the window's drop-zone listeners off the page, for a page that builds another window. */
dispose() {
this.pageListeners.abort();
this.settleNudge?.();
}
/** Where a disc from this computer goes, in words. */
get targetName() {
return `drive ${this.targetDrive}`;
}
/**
* Opens a file from this computer into the aimed drive, the deck or the machine's state, says
* so, boots a disc that went into drive 0 as Autoboot says, and gets out of the way.
*/
async openFile(file, title, entry) {
try {
const opened = await this.media.openFile(file, this.targetDrive, entry);
if (!opened) return;
toast(opened.words, { title });
if (opened.kind === "disc") this.loaded(opened.driveIndex);
this.close();
} catch (error) {
reportLoadFailure(file.name, error);
}
}
/** Opens with the list, aimed at drive 0 (the deck, on a machine without drives). */
open() {
this.setTarget(this.defaultTarget);
this.showList(true);
this.floating.open();
this.list.search.select();
this.list.search.focus();
}
/** Opens from a slot's own line, aimed at that slot. */
openFor(target) {
this.floating.open();
this.aimAt(this.model.hasDiscDrives ? target : "tape");
}
close() {
this.floating.close();
}
buildBay(driveIndex) {
const template = document.getElementById("drive-bay-template");
const section = template.content.firstElementChild.cloneNode(true);
this.panel.querySelector(".bays").appendChild(section);
const upperSide = upperSideOf(driveIndex);
section.dataset.drive = driveIndex;
section.setAttribute("aria-label", `Drive ${driveIndex}`);
section.querySelector(".bay-number").textContent = `${driveIndex}/${upperSide}`;
section.querySelector(".bay-badge").title =
`Drive ${driveIndex}; the BBC calls the other side of its disc drive ${upperSide}`;
section.querySelector(".bay-pitch-legend").textContent = `Drive ${driveIndex} reads`;
section.querySelector(".bay-led").setAttribute("aria-label", `Drive ${driveIndex} idle`);
const pitch = section.querySelector(".pitch");
pitch.title = `Drive ${driveIndex}'s 40/80 track switch`;
for (const radio of pitch.querySelectorAll("input")) {
radio.name = `pitch-${driveIndex}`;
radio.setAttribute("aria-label", `${radio.value} track`);
radio.closest("label").title = `Drive ${driveIndex} reads ${radio.value} track discs`;
radio.addEventListener("change", () =>
this.drives.setTracksPerStep(driveIndex, tracksPerStepOf(radio.value)),
);
}
// The knob's track is a switch too: a click throws it the other way.
pitch.querySelector(".track").addEventListener("click", () => {
const other = [...pitch.querySelectorAll("input")].find((radio) => !radio.checked);
Iif (!other || other.disabled) return;
other.checked = true;
other.dispatchEvent(new Event("change"));
});
const bay = {
driveIndex,
section,
led: section.querySelector(".bay-led"),
eject: section.querySelector(".bay-eject"),
slot: section.querySelector(".bay-slot"),
title: section.querySelector(".bay-title"),
dfs: section.querySelector(".bay-dfs"),
sub: section.querySelector(".bay-sub"),
status: section.querySelector(".bay-status"),
kept: section.querySelector(".bay-kept"),
fail: section.querySelector(".bay-fail"),
retry: section.querySelector(".bay-retry"),
hide: section.querySelector(".bay-hide"),
save: section.querySelector(".bay-save"),
surface: section.querySelector(".bay-surface"),
report: section.querySelector(".bay-report"),
notes: section.querySelector(".bay-notes"),
radios: [...pitch.querySelectorAll("input")],
watched: null,
onTrackWrite: (isSideUpper, trackNum) => {
Eif (!isSideUpper && trackNum === 0) this.showSticker(bay);
},
};
// The latch ejects a disc, and on an empty drive it is where you would put one in.
bay.eject.addEventListener("click", () => {
const slot = this.slots.drive(driveIndex);
if (slot.media) this.slots.eject(slot);
else this.aimAt(driveIndex);
});
bay.slot.addEventListener("click", () => this.aimAt(driveIndex));
const bar = section.querySelector(".bay-bar");
bar.querySelector(".bay-bar-label").textContent = `drive ${driveIndex}/${upperSide}`;
bar.title = `Show drive ${driveIndex}`;
bar.addEventListener("click", () => this.showDrive(true));
bay.bar = bar;
bay.barName = bar.querySelector(".bay-bar-name");
bay.hide.title = `Fold drive ${driveIndex} away`;
bay.hide.addEventListener("click", () => this.showDrive(false));
bay.retry.addEventListener("click", () =>
this.loadDisc(driveIndex, this.slots.drive(driveIndex).failed.descriptor, {
...this.askedOf(driveIndex),
entry: "retry",
}),
);
section
.querySelector(".bay-save-ssd")
.addEventListener("click", () => this.drives.downloadSsdOrDsd(driveIndex));
section.querySelector(".bay-save-hfe").addEventListener("click", () => this.drives.downloadHfe(driveIndex));
section.querySelector(".bay-save-drive").addEventListener("click", () => this.offerCopyToDrive(driveIndex));
bay.save.title = `Download drive ${driveIndex}'s disc as an image`;
bay.surface.title = `Open the disc surface window on drive ${driveIndex}`;
bay.surface.addEventListener("click", () => this.visualiser.openOn(driveIndex));
bay.report.title = `Open the disc surface window on drive ${driveIndex}, listing what is odd about the disc`;
bay.report.addEventListener("click", () => this.visualiser.openReport(driveIndex));
return bay;
}
buildDeck() {
const deck = {
section: document.getElementById("media-deck"),
data: document.getElementById("deck-data"),
counter: document.getElementById("tape-counter"),
window: document.getElementById("deck-window"),
cassette: document.getElementById("deck-cassette"),
empty: document.getElementById("deck-empty"),
title: document.getElementById("deck-tape-title"),
sub: document.getElementById("deck-tape-sub"),
status: document.getElementById("deck-status"),
fail: document.getElementById("deck-fail"),
retry: document.getElementById("deck-retry"),
rewind: document.getElementById("tape-rewind"),
play: document.getElementById("tape-play"),
stop: document.getElementById("tape-stop"),
eject: document.getElementById("tape-eject"),
barName: document.getElementById("deck-bar-name"),
bar: document.getElementById("deck-toggle"),
hide: document.getElementById("deck-hide"),
shown: undefined,
};
deck.window.addEventListener("click", () => this.aimAt("tape"));
deck.eject.addEventListener("click", () => this.slots.eject(this.slots.deck));
deck.retry.addEventListener("click", () =>
this.loadTape(this.slots.deck.failed.descriptor, { entry: "retry" }),
);
for (const [button, press] of [
[deck.rewind, "rewindTape"],
[deck.play, "pressPlay"],
[deck.stop, "pressStop"],
]) {
button.addEventListener("click", () => {
this.processor.tapeInterface[press]();
this.renderDeck();
});
}
deck.bar.addEventListener("click", () => this.showDeck(true));
deck.hide.addEventListener("click", () => this.showDeck(false));
document.getElementById("tape-counter-reset").addEventListener("click", () => {
this.counterBase = this.tapeCount();
this.showCounter();
});
return deck;
}
buildList() {
const list = {
search: document.getElementById("media-search"),
count: document.getElementById("media-count"),
chips: document.getElementById("media-chips"),
rows: document.getElementById("media-list"),
open: document.getElementById("media-open"),
openText: document.getElementById("media-open-text"),
openLabel: document.getElementById("media-open-label"),
into: document.getElementById("media-into"),
hint: document.getElementById("media-hint"),
bar: document.getElementById("list-toggle"),
hide: document.getElementById("list-hide"),
newDiscLabel: document.getElementById("media-new-disc-label"),
newDiscWhere: document.getElementById("media-new-disc-where"),
copyFrom: null,
autoboot: this.panel.querySelector(".autoboot"),
newDisc: document.getElementById("media-new-disc"),
newDiscForm: document.getElementById("media-new-disc-form"),
newDiscName: document.getElementById("media-new-disc-name"),
newDiscDriveOption: document.getElementById("media-new-disc-drive-option"),
connect: document.getElementById("media-connect-drive"),
descriptors: [],
failures: [],
latest: null,
query: "",
searchNoted: false,
source: "all",
kinds: { disc: true, tape: true },
loaded: false,
};
list.search.addEventListener("input", () => {
list.query = list.search.value.trim();
if (list.query && !list.searchNoted) {
list.searchNoted = true;
noteFeature(this.panel, "search");
}
this.renderList();
});
// Enter takes the first match; the arrows walk the rows and come back to the box.
list.search.addEventListener("keydown", (e) => {
const first = list.rows.querySelector(".media-row-main");
if (e.key === "Enter" && first) {
e.preventDefault();
this.loadInto(this.rowTarget(first.descriptor), first.descriptor, {
shift: e.shiftKey,
entry: first.entry,
});
} else Eif (e.key === "ArrowDown" && first) {
e.preventDefault();
first.focus();
}
});
list.rows.addEventListener("keydown", (e) => {
const row = e.target.closest(".media-row");
Iif (!row) return;
const step = e.key === "ArrowDown" ? 1 : e.key === "ArrowUp" ? -1 : 0;
Iif (!step) return;
e.preventDefault();
const rows = [...list.rows.querySelectorAll(".media-row")];
const next = rows[rows.indexOf(row) + step];
if (next) next.querySelector(".media-row-main").focus();
else Eif (step < 0) list.search.focus();
});
list.open.addEventListener("change", async (evt) => {
const file = evt.target.files[0];
Iif (!file) return;
await this.openFile(file, "Opened", "file");
evt.target.value = "";
});
list.connect.addEventListener("click", async () => {
Eif (await this.driveSource.connect()) this.loadDriveDiscs();
});
list.autoboot.checked = true;
list.autoboot.addEventListener("change", () => this.renderList());
list.newDisc.addEventListener("click", () => this.showDiscForm({ copyFrom: null }));
document.getElementById("media-new-disc-cancel").addEventListener("click", () => {
list.newDiscForm.hidden = true;
list.search.focus();
});
list.newDiscForm.addEventListener("submit", (e) => {
e.preventDefault();
const where = list.newDiscForm.querySelector('input[name="media-new-disc-where"]:checked').value;
this.createDisc(list.newDiscName.value.trim(), where);
});
list.bar.addEventListener("click", () => {
this.showList(true);
this.list.search.focus();
});
list.hide.addEventListener("click", () => this.showList(false));
for (const button of list.into.querySelectorAll("[data-target]"))
button.addEventListener("click", () => this.aimAt(targetFrom(button.dataset.target)));
return list;
}
/** Points the list at a slot, unfolded and ready to type into: what Enter on a row loads into. */
aimAt(target) {
this.unfold(target);
this.setTarget(target);
this.showList(true);
this.list.search.select();
this.list.search.focus();
this.nudgeSearch();
}
/** Draws the eye to the search box, which is where a slot's "load one" leads. */
nudgeSearch() {
const box = this.list.search;
this.settleNudge?.();
box.classList.remove("attention");
void box.offsetWidth;
box.classList.add("attention");
const settle = () => {
box.classList.remove("attention");
box.removeEventListener("animationend", settle);
window.clearTimeout(timer);
this.settleNudge = null;
};
const timer = window.setTimeout(settle, NudgeMs);
box.addEventListener("animationend", settle);
this.settleNudge = settle;
}
unfold(target) {
if (target === "tape") this.showDeck(true);
else if (target === FoldableDrive) this.showDrive(true);
}
/** Aiming at a drive shows discs, aiming at the deck shows tapes; the chips can widen that. */
setTarget(target) {
this.target = target;
const forTape = target === "tape";
this.list.kinds = { disc: !forTape, tape: forTape };
for (const bay of this.bays) bay.section.classList.toggle("target", target === bay.driveIndex);
this.deck.window.classList.toggle("target", forTape);
const into = forTape ? "the deck" : `drive ${target}`;
this.list.openText.textContent = `Open a file into ${into}…`;
this.list.openLabel.title = forTape
? `Open a tape image from this computer${this.model.hasDiscDrives ? "; a disc image goes into drive 0" : ""}`
: `Open a disc image from this computer into drive ${target}; a tape image goes into the deck`;
this.list.search.placeholder = forTape
? "Search for a tape for the deck"
: `Search for a disc for drive ${target}`;
for (const button of this.list.into.querySelectorAll("[data-target]")) {
const aimed = button.dataset.target === String(target);
button.classList.toggle("active", aimed);
button.setAttribute("aria-pressed", String(aimed));
}
this.renderChips();
this.renderList();
}
/** What the keys do to the row Enter takes, or where the list is aimed when there is none. */
renderHint() {
const first = this.list.rows.querySelector(".media-row-main")?.descriptor;
const target = first ? this.rowTarget(first) : this.target;
const keys = hintKeys(target, this.bootableFor(first), this.list.autoboot.checked);
this.list.hint.replaceChildren(
...[...keys, ["Esc", "closes"]].map(([key, what]) => {
const span = document.createElement("span");
const kbd = document.createElement("kbd");
kbd.textContent = key;
span.append(kbd, ` ${what}`);
return span;
}),
);
}
/** @returns {Promise<object[]>} the descriptors this refresh fetched, shown unless a newer one overtook it */
async refreshList() {
const listing = this.media.listAll();
this.list.latest = listing;
const { descriptors, failures } = await listing;
// A newer refresh has been asked for meanwhile: its answer is the one to show.
if (this.list.latest !== listing) return descriptors;
this.list.descriptors = this.model.hasDiscDrives ? descriptors : descriptors.filter((d) => d.kind === "tape");
this.list.failures = failures;
this.list.loaded = true;
// A source that has dropped out of the listing cannot stay the one chosen.
if (this.list.source !== "all" && !this.list.descriptors.some((d) => d.source === this.list.source))
this.list.source = "all";
this.list.connect.hidden = !this.model.hasDiscDrives || this.driveSource.connected;
this.list.newDiscDriveOption.hidden = !this.driveSource.connected;
this.renderChips();
this.renderList();
this.renderAll();
return descriptors;
}
renderChips() {
const { list } = this;
const counts = new Map();
for (const d of list.descriptors) counts.set(d.source, (counts.get(d.source) ?? 0) + 1);
const chip = (label, title, pressed, onClick) => {
const button = document.createElement("button");
button.type = "button";
button.className = "media-chip";
button.textContent = label;
button.title = title;
button.setAttribute("aria-pressed", String(pressed));
button.addEventListener("click", onClick);
return button;
};
const gap = document.createElement("span");
gap.className = "gap";
gap.setAttribute("aria-hidden", "true");
const pick = (change) => () => {
change();
this.renderChips();
this.renderList();
};
list.chips.replaceChildren(
chip(
"All",
"Every source",
list.source === "all",
pick(() => (list.source = "all")),
),
...Object.entries(Sources)
.filter(([source]) => counts.has(source))
.map(([source, { name, title }]) =>
chip(
`${name} ${counts.get(source)}`,
title,
list.source === source,
pick(() => (list.source = source)),
),
),
gap,
...(this.model.hasDiscDrives ? ["disc", "tape"] : ["tape"]).map((kind) =>
chip(
kind === "disc" ? "Discs" : "Tapes",
`Show ${kind}s`,
list.kinds[kind],
pick(() => (list.kinds[kind] = !list.kinds[kind])),
),
),
);
}
renderList() {
const { list } = this;
const shown = list.descriptors
.filter((d) => list.kinds[d.kind] && (list.source === "all" || d.source === list.source))
.filter((d) => matchesQuery(d, list.query))
.sort(compareForQuery(list.query));
const recent = list.query ? [] : this.recentAmong(shown);
const rest = shown.filter((d) => !recent.includes(d)).slice(0, MaxRows - recent.length);
const rows = [
...(recent.length
? [this.buildHeading("Recently loaded"), ...recent.map((d) => this.buildRow(d, { recent: true }))]
: []),
...(recent.length && rest.length ? [this.buildHeading("Everything else")] : []),
...rest.map((d) => this.buildRow(d)),
];
const notices = list.failures.map((failure) => {
const li = document.createElement("li");
li.className = "notice";
li.textContent = `Could not list ${failure}`;
return li;
});
if (!list.loaded || shown.length === 0) {
const li = document.createElement("li");
li.className = "notice";
li.textContent = !list.loaded
? "Fetching the archives…"
: list.query
? `Nothing matches "${list.query}"`
: "Nothing to show";
notices.push(li);
}
list.rows.replaceChildren(...notices, ...rows);
this.renderHint();
list.count.textContent = list.loaded
? shown.length > MaxRows
? `showing ${MaxRows} of ${shown.length}; keep typing to narrow it`
: `${shown.length} of ${list.descriptors.length}`
: "";
}
/** The rows that were loaded lately, newest first, each reference once. */
recentAmong(shown) {
const { recent } = this.slots;
const ranked = new Map();
for (const d of shown) {
const rank = recent.rank(d);
if (rank >= 0 && !ranked.has(rank)) ranked.set(rank, d);
}
return [...ranked].sort(([a], [b]) => a - b).map(([, d]) => d);
}
/** A heading for the eye only: each recent row's label says it was loaded recently. */
buildHeading(words) {
const li = document.createElement("li");
li.className = "media-heading small text-uppercase text-muted px-2 pt-2 pb-1";
li.setAttribute("aria-hidden", "true");
li.textContent = words;
return li;
}
buildRow(d, { recent = false } = {}) {
const li = document.createElement("li");
li.className = "media-row";
const main = document.createElement("button");
main.type = "button";
main.className = "media-row-main";
const target = this.rowTarget(d);
const label = [d.title, d.publisher, d.detail, sourceName(d.source)].filter(Boolean).join(", ");
main.title = this.actionWords(target, d, label);
main.setAttribute("aria-label", recent ? `${main.title}, recently loaded` : main.title);
const cell = (className, text) => {
const span = document.createElement("span");
span.className = className;
span.textContent = text;
return span;
};
const detail = cell("detail", d.detail);
if (d.savesChanges) {
const saves = cell("saves", "saves changes");
saves.title = "Writes to this disc are kept";
detail.prepend(saves, d.detail ? " · " : "");
}
const inDrive = this.slotHolding(d);
if (inDrive !== null) detail.append(detail.textContent ? " · " : "", cell("in-drive", `in ${inDrive}`));
const source = cell(`media-source src-${d.source}`, sourceName(d.source));
source.title = Sources[d.source]?.title ?? "";
const keycap = cell("media-keycap", target === "tape" ? "T" : String(target));
keycap.setAttribute("aria-hidden", "true");
main.append(
cell(`title${d.publisher || d.detail ? "" : " thin"}`, d.title),
cell("publisher", d.publisher),
detail,
source,
keycap,
);
main.descriptor = d;
main.entry = recent ? "recent" : "list";
main.addEventListener("click", (e) => this.loadInto(target, d, { shift: e.shiftKey, entry: main.entry }));
const targets = document.createElement("span");
targets.className = "targets";
if (d.kind === "disc") {
const other = otherDrive(target === "tape" ? 0 : target);
const button = document.createElement("button");
button.type = "button";
button.className = "media-target";
button.textContent = String(other);
button.title = this.actionWords(other, d, d.title);
button.setAttribute("aria-label", button.title);
button.addEventListener("click", (e) => this.loadDisc(other, d, { shift: e.shiftKey, entry: main.entry }));
targets.append(button);
}
const page = webPage(d.url);
if (page) {
const about = document.createElement("a");
about.className = "media-target media-about";
about.href = page.href;
about.target = "_blank";
about.rel = "noopener";
about.textContent = "↗";
about.title = `About ${d.title} at ${page.host}`;
about.setAttribute("aria-label", about.title);
targets.append(about);
}
li.append(main, targets);
return li;
}
/** What a plain click on `d`, named `label`, does when it goes to `target`. */
actionWords(target, d, label) {
if (target === "tape") return `Load ${label} into the cassette deck`;
return this.decideBoot(target, d).boots
? `Boot ${label} from drive ${target}`
: `Load ${label} into drive ${target}`;
}
/** What a load of `d` into `driveIndex` does, by the Autoboot tick as it is now; null `d` is one loaded here. */
decideBoot(driveIndex, d, asked = {}) {
return bootDecision({
driveIndex,
bootable: this.bootableFor(d),
ticked: this.list.autoboot.checked,
...asked,
});
}
/** Which slot a descriptor's media is loaded in, as text, or null. */
slotHolding(d) {
return this.slots.holding(d.ref)?.name ?? null;
}
/** The drive the list is aimed at; aiming at the deck leaves discs going to drive 0. */
get targetDrive() {
return this.target === "tape" ? 0 : this.target;
}
/** Where a row's own action sends its descriptor: the deck for a tape, the aimed drive for a disc. */
rowTarget(d) {
return d.kind === "tape" ? "tape" : this.targetDrive;
}
loadInto(target, d, options = {}) {
if (d.kind === "tape") return this.loadTape(d, options);
return this.loadDisc(target, d, options);
}
/**
* Google Drive has just been connected: the list can show it, and a drive whose disc from
* there could not be loaded before (the URL named it at startup, say) can be filled.
*/
async loadDriveDiscs() {
const descriptors = await this.refreshList();
for (const slot of this.slots.driveSlots) {
const wanted = slot.failed?.descriptor;
if (slot.media || slot.busy || wanted?.source !== "gdrive") continue;
const listed = descriptors.find((d) => d.ref === wanted.ref) ?? wanted;
await this.loadDisc(slot.index, listed, { ...this.askedOf(slot.index), stayOpen: true, entry: "retry" });
}
}
/**
* @param {object} [options] `shift`: the gesture had Shift held, so it does the opposite of the
* Autoboot tick; `boot`: boot or not whatever the tick says; `stayOpen`: the load was not what the
* window was opened for; `entry`: how it was asked for
*/
async loadDisc(driveIndex, d, { shift = false, boot, stayOpen = false, entry } = {}) {
this.unfold(driveIndex);
const slot = this.slots.drive(driveIndex);
if (
!this.machineSwitch.satisfies(d) &&
(await this.machineSwitch.switchFor(d, slot, {
boot: this.decideBoot(driveIndex, d, { shift, boot }).boots,
}))
) {
this.slots.recent.note(d.ref, "disc");
return;
}
const asked = (this.asked[driveIndex] = { shift, boot });
const outcome = await this.slots.load(slot, d, { entry });
if (outcome !== "failed" && this.asked[driveIndex] === asked) this.asked[driveIndex] = null;
if (outcome !== "loaded") return;
// The tick is read now, not before the wait, in case it was changed meanwhile.
this.loaded(driveIndex, asked);
if (!stayOpen) this.close();
}
/**
* A retry asks for what the failed load asked for; a load the window did not ask for, as a link's
* was, boots as the URL says.
*/
askedOf(driveIndex) {
return this.asked[driveIndex] ?? { boot: this.media.params.autoboot !== undefined };
}
/** Boots what has just gone into a drive if it is to, and has the URL say whether a link to it boots. */
loaded(driveIndex, asked) {
const { inUrl } = this.slots.drive(driveIndex);
const { boots, urlAutoboot } = this.decideBoot(driveIndex, null, { ...asked, inUrl });
if (boots) {
this.processor.reset(true);
this.boot();
}
if (urlAutoboot !== undefined) this.media.setAutoboot(urlAutoboot);
}
async loadTape(d, { entry } = {}) {
this.unfold("tape");
if ((await this.slots.load(this.slots.deck, d, { entry })) === "loaded") this.close();
}
boot() {
noteFeature(this.panel, "boot");
this.autoboot();
}
/**
* The name form, for a blank disc or for a copy of what a drive holds; the
* copy can only go to Google Drive, since a browser-local disc saves in place.
*/
showDiscForm({ copyFrom }) {
const { list } = this;
list.copyFrom = copyFrom;
const copying = copyFrom !== null;
const disc = copying ? this.slots.drive(copyFrom).media : null;
list.newDiscLabel.textContent = copying ? `Copy the disc in drive ${copyFrom} to Google Drive as` : "Name";
list.newDiscWhere.hidden = copying;
list.newDiscForm.querySelector(`input[value="${copying ? "gdrive" : "browser"}"]`).checked = true;
list.newDiscName.value = disc ? disc.name.split("/").pop() : "";
list.newDiscForm.hidden = false;
list.newDiscName.focus();
list.newDiscName.select();
}
/** Save to Google Drive on a bay: connect if need be, then ask for the copy's name. */
async offerCopyToDrive(driveIndex) {
if (!this.driveSource.connected && !(await this.driveSource.connect())) return;
this.loadDriveDiscs();
this.showList(true);
this.showDiscForm({ copyFrom: driveIndex });
}
/**
* A disc kept in this browser or on Google Drive, put in the aimed drive:
* blank and formatted, or a copy of what a drive holds. A name with no
* extension is an SSD; an HFE can only be a blank on Google Drive.
*/
async createDisc(name, where) {
Iif (!name) return;
const copyFrom = this.list.copyFrom;
const discType = guessDiscTypeFromName(name);
const blankFluxOnDrive = discType.isFluxImage && copyFrom === null && where === "gdrive";
if (!discType.setDiscName && !blankFluxOnDrive) name = replaceOrAddExtension(name, ".ssd");
const driveIndex = copyFrom ?? this.targetDrive;
this.list.newDiscForm.hidden = true;
if (copyFrom === null && where === "browser")
return this.loadDisc(driveIndex, describeBrowserDisc(name), { boot: false, entry: "create" });
const copied = copyFrom === null ? null : await this.drives.sectorImage(copyFrom);
Iif (copyFrom !== null && !copied) return;
const layout = this.drives.layoutForDrive(driveIndex);
const making = { ref: undefined, kind: "disc", title: name, publisher: "", detail: "", source: "gdrive" };
const outcome = await this.slots.load(this.slots.drive(driveIndex), making, {
entry: "create",
fetch: async () => {
const { ref, disc } =
copyFrom === null
? await this.driveSource.createBlank(name, layout)
: await this.driveSource.createFrom(name, copied, layout);
return { media: disc, ref };
},
});
if (outcome !== "loaded") return;
this.loaded(driveIndex, { boot: false });
this.close();
}
/** Folds the recorder to one line, or unfolds it. */
showDeck(shown) {
this.panel.classList.toggle("deck-collapsed", !shown);
this.deck.bar.setAttribute("aria-expanded", String(shown));
}
/** Folds the second drive to one line, or unfolds it. */
showDrive(shown) {
const bay = this.bays[FoldableDrive];
bay.section.classList.toggle("folded", !shown);
bay.bar.setAttribute("aria-expanded", String(shown));
}
/** Folds the list to one line, or unfolds it. */
showList(shown) {
this.panel.classList.toggle("list-collapsed", !shown);
this.list.bar.setAttribute("aria-expanded", String(shown));
}
renderAll() {
for (const bay of this.bays) this.renderDrive(bay.driveIndex);
this.renderDeck();
}
/** The DFS title and cycle number off the disc, kept up to date as its catalogue is written. */
showSticker(bay) {
const disc = this.slots.drive(bay.driveIndex).media;
if (bay.watched !== disc) {
bay.watched?.removeTrackWriteListener(bay.onTrackWrite);
disc?.addTrackWriteListener(bay.onTrackWrite);
bay.watched = disc ?? null;
}
const catalogue = disc ? dfsCatalogue(disc) : null;
bay.dfs.textContent = catalogue?.title ? `${catalogue.title} (${catalogue.cycle})` : "";
bay.dfs.hidden = !catalogue?.title;
}
/** The title the list gave a reference, when it has one, else what the machine calls it. */
nameFor(ref, fallback) {
return (ref && this.list.descriptors.find((d) => d.ref === ref)?.title) || fallback;
}
renderDrive(driveIndex) {
const bay = this.bays[driveIndex];
const { media: disc, busy, failed, ref } = this.slots.drive(driveIndex);
const tracks = tracksLabel(this.processor.fdc.drives[driveIndex].tracksPerStep);
const readout = this.readouts[driveIndex];
bay.section.dataset.state = busy ? "busy" : disc ? "loaded" : "empty";
for (const radio of bay.radios) radio.checked = radio.value === tracks;
for (const control of [bay.save, bay.surface, bay.report]) control.disabled = !disc || !!busy;
this.showNotes(bay, busy ? [] : (disc?.loadNotes ?? []));
bay.eject.disabled = !!busy;
bay.fail.textContent = failureWords(failed);
bay.retry.hidden = !failed;
bay.hide.hidden = driveIndex !== FoldableDrive || !!disc || !!busy;
if (busy) {
bay.status.textContent = loadingWords(busy);
bay.kept.textContent = "";
} else if (!disc) {
const pickOne = `Drive ${driveIndex} is empty; click to pick a disc for it from the list`;
bay.eject.title = pickOne;
bay.slot.title = pickOne;
bay.status.textContent = `nothing loaded · reads ${tracks} track discs`;
bay.title.textContent = "";
bay.sub.textContent = "";
bay.kept.textContent = "";
this.showSticker(bay);
bay.barName.textContent = "empty";
readout.querySelector(".name").textContent = "empty";
readout.title = `Drive ${driveIndex} is empty. Click to open the media window`;
} else {
const sides = disc.isDoubleSided
? `2 sides (drives ${driveIndex} and ${upperSideOf(driveIndex)})`
: "1 side";
const source = sourceOf(ref);
const name = this.nameFor(ref, disc.name);
bay.title.textContent = name;
this.showSticker(bay);
bay.sub.textContent = [`${tracks} track`, sides, source].filter(Boolean).join(" · ");
bay.status.textContent = [`${tracks}T`, sides, source].filter(Boolean).join(" · ");
bay.kept.textContent = disc.savesChanges ? "· keeps changes" : "· changes are not being kept";
bay.kept.classList.toggle("warn", !disc.savesChanges);
bay.kept.title = disc.savesChanges
? "Writes to this disc are saved where it came from"
: "Writes to this disc are lost when the page reloads; use Save to keep a copy";
bay.eject.title = `Eject ${name} from drive ${driveIndex}`;
bay.slot.title = `${name} is in drive ${driveIndex}; click to pick something else for it`;
bay.barName.textContent = name;
readout.querySelector(".name").textContent = shortName(name);
readout.title = `Drive ${driveIndex} holds ${name}, ${tracks} track. Click to open the media window`;
}
this.showSummary();
}
/** What loading the disc found out, oddities picked out. */
showNotes(bay, notes) {
bay.notes.replaceChildren(
...notes.flatMap(({ text, isOdd }, index) => {
const part = document.createElement("span");
part.textContent = text;
part.classList.toggle("warn", isOdd);
return index ? [" · ", part] : [part];
}),
);
bay.notes.title = notes.map(({ text }) => text).join("\n");
bay.notes.hidden = !notes.length;
}
renderDeck() {
const { deck } = this;
const { media: tape, busy, failed, ref } = this.slots.deck;
const { playPressed, tapeRunning } = this.processor.tapeInterface;
const isAtom = this.model.isAtom;
const readout = this.readouts.tape;
deck.section.classList.toggle("busy", !!busy);
deck.cassette.hidden = !tape;
deck.empty.hidden = !!tape;
deck.rewind.disabled = !tape;
deck.eject.disabled = !tape || !!busy;
deck.play.disabled = !tape || playPressed;
deck.stop.disabled = !tape || !playPressed;
deck.play.setAttribute("aria-pressed", String(playPressed));
deck.play.title = isAtom ? "Play the tape" : "Play: the tape runs whenever the BBC switches its motor on";
deck.stop.title = isAtom ? "Stop the tape" : "Stop: the tape stays put however the BBC sets its motor";
deck.fail.textContent = failureWords(failed);
deck.retry.hidden = !failed;
deck.hide.hidden = !!tape || !!busy;
if (busy) {
deck.status.textContent = loadingWords(busy);
} else if (!tape) {
deck.window.title = "The deck is empty; click to pick a tape for it from the list";
deck.eject.title = "Nothing to eject";
deck.status.textContent = "nothing loaded";
deck.barName.textContent = "empty";
readout.querySelector(".name").textContent = "empty";
readout.title = "The cassette deck is empty. Click to open the media window";
} else {
const source = sourceOf(ref);
const name = this.nameFor(ref, tape.name);
deck.title.textContent = name;
deck.sub.textContent = source ?? "";
deck.window.title = `${name} is in the deck; click to pick another tape for it`;
deck.eject.title = `Eject ${name}`;
const { motorOn } = this.processor.tapeInterface;
const state = tapeRunning
? "playing"
: !playPressed || isAtom
? "stopped"
: motorOn
? "at the end"
: "motor off";
deck.status.textContent = [name, source, state].filter(Boolean).join(" · ");
deck.barName.textContent = name;
readout.querySelector(".name").textContent = shortName(name);
readout.title = `The cassette deck holds ${name}. Click to open the media window`;
}
this.showCounter();
this.showSummary();
}
showSummary() {
const drives = this.model.hasDiscDrives ? this.processor.fdc.drives : [];
const parts = drives.map((drive, i) => `${i}: ${drive.disc?.name ?? "empty"}`);
parts.push(`tape: ${this.processor.tapeInterface.tape?.name ?? "empty"}`);
this.summary.textContent = parts.join(" · ");
}
tapeCount() {
const tape = this.processor.tapeInterface.tape;
return tape ? Math.floor(tape.position * (CounterDivisions - 1)) : 0;
}
showCounter() {
const reading = (this.tapeCount() - this.counterBase + CounterDivisions) % CounterDivisions;
const digits = this.processor.tapeInterface.tape ? counterDigits(reading) : "";
if (digits === this.lastCounter) return;
this.lastCounter = digits;
const shown = digits || counterDigits(0);
this.deck.counter.querySelectorAll("b").forEach((digit, i) => (digit.textContent = shown[i]));
this.deck.counter.setAttribute("aria-label", `Tape counter ${shown}`);
this.readouts.tape.querySelector(".counter").textContent = digits;
}
/** Cheap enough to run every emulation tick: the lights, the reels and the counter. */
tick() {
const { tapeInterface, fdc } = this.processor;
const running = !!(tapeInterface.tape && tapeInterface.tapeRunning);
if (running !== this.deck.section.classList.contains("motor")) {
this.deck.section.classList.toggle("motor", running);
this.deck.data.classList.toggle("on", running);
this.readouts.tape.classList.toggle("motor", running);
this.renderDeck();
}
this.showCounter();
if (!this.isOpen) return;
for (const bay of this.bays) {
const lit = !!fdc.motorOn[bay.driveIndex];
if (lit !== bay.led.classList.contains("on")) {
bay.led.classList.toggle("on", lit);
const title = lit
? `Drive ${bay.driveIndex} selected by the disc controller`
: `Drive ${bay.driveIndex} idle`;
bay.led.title = title;
bay.led.setAttribute("aria-label", title);
}
}
}
}
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