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* The store drawer: a store, as a page of its own, down the left of the window.
*
* The same kind of panel the Analysis drawer and the console are (§18.1, §23),
* and for the same reason: a store is a place to *work* — narrow a catalogue,
* tick four files, open them beside the map — and a modal would take the
* keyboard and dismiss on a stray click, which is exactly wrong for a reader
* comparing what a portal has against what they have open. So it floats over
* the body with a shadow to say so, is dragged by the edge that faces the map,
* Escape puts it down, and every shortcut keeps working behind it.
*
* **Down the left**, because that is where files come from: the Files column
* is there, the header's three doors to a file are there, and the Analysis
* drawer already has the right. **One per window** rather than one per tab,
* on the Files column's argument (§20.4): a store is not a fact about the file
* in front, and switching tabs should not lose the catalogue somebody was half
* way through narrowing. What a row opens goes to the tab in front, or to a new
* one — `ui/stores/host.ts` says which, and why a row never destroys a tab.
*
* ## The view is in the address bar
*
* `?store=encode&assay=ChIP-seq&view=matrix` is what the drawer writes as the
* reader narrows (§24.2), replacing rather than pushing so the Back button
* still walks the map's own history; closing the drawer takes it out again. A
* reload with the store in the address reopens the drawer where it was, and
* *copy link* hands the same address to a colleague. The hash is untouched
* throughout — it belongs to the tab's view state (§5.5) — and `App.writeHash`
* carries the query along when it writes the hash, so the two never fight.
*
* ## Nothing is fetched until a store is opened
*
* The tiles are descriptions (`ui/stores/registry.ts`). Opening one is the
* gesture that reads its files, and a `?store=` in a link is a gesture arriving
* from outside — somebody clicked a URL naming this store.
*/
import { el } from './dom'
import { icon, iconButton } from './icons'
import { resizeHandle } from './resizeHandle'
import { copyTextToClipboard } from './export'
import { messageToast } from './toast'
import { KEYS, withKey } from './commands'
import { EMPTY_VIEW, writeStoreView, type StoreView } from '../state/facets'
import { subscribeStores } from '../state/stores'
import { looksLikeHubUrl } from '../state/hub'
import { CustomView } from './stores/CustomView'
import { GalleryView } from './stores/GalleryView'
import { GenomesView } from './stores/GenomesView'
import { PortalView } from './stores/PortalView'
import { storeMark } from './stores/marks'
import { customStore, frontById, storeFronts, type StoreFront } from './stores/registry'
import { storeTiles } from './stores/tiles'
import { downloadBlob } from './export'
import type { StoreFile } from '../state/store'
import type { StoreHost } from './stores/host'
/**
* Where the dragged width and the last store are kept.
*
* `localStorage`, on the reasoning the Analysis drawer gives for its width:
* how wide a reader likes this drawer, and which store they were last in, are
* preferences about this window rather than a train of thought about a file.
* Whether it is *open* is not kept — the address bar carries that, which is
* what makes a reload land where the reader was without a drawer opening over
* every fresh visit.
*/
const WIDTH_KEY = 'chromosomix:store-drawer:width'
const LAST_KEY = 'chromosomix:store-drawer:last'
/** Below this the rail and the rows do not both fit. */
const MIN_WIDTH = 440
const DEFAULT_FRACTION = 0.64
/** Not 1: a sliver of the map showing is what says this is a drawer. */
const MAX_FRACTION = 0.95
function readStoredWidth(): number | null {
try {
const raw = window.localStorage.getItem(WIDTH_KEY)
if (raw === null) return null
const value = Number(raw)
return Number.isFinite(value) && value > 0 ? value : null
} catch {
return null
}
}
function writeStoredWidth(width: number | null): void {
try {
if (width === null) window.localStorage.removeItem(WIDTH_KEY)
else window.localStorage.setItem(WIDTH_KEY, String(Math.round(width)))
} catch {
/* a browser that refuses storage still resizes correctly for this session */
}
}
function readLast(): string | null {
try {
return window.localStorage.getItem(LAST_KEY)
} catch {
return null
}
}
function writeLast(id: string): void {
try {
window.localStorage.setItem(LAST_KEY, id)
} catch {
/* as above */
}
}
/** A control whose Escape means "leave this field", which outranks the drawer's. */
/**
* Whether this id is one of the two **doors** rather than a store.
*
* A door is a URL box with nothing behind it until something is typed, so it is
* never what *last store* should reopen — and it is the one front whose typed
* URL is worth keeping when the drawer is closed, since there is no `rows` to
* find it again from.
*/
function isDoor(id: string): boolean {
return id === 'custom' || id === 'hub'
}
function takesEscape(node: HTMLElement): boolean {
if (node instanceof HTMLTextAreaElement || node instanceof HTMLSelectElement) return true
if (!(node instanceof HTMLInputElement)) return node.isContentEditable
return !['button', 'checkbox', 'radio', 'range', 'submit', 'reset'].includes(node.type)
}
/**
* What the downloaded catalogue is called.
*
* A built-in is its own id, which is the name its generator writes and the name
* the site serves. A store read from a URL keeps that URL's file name where it
* has one, so a reader who downloads what they typed gets back something they
* recognise, and falls back to the catalogue's own name.
*/
function storeFileName(front: StoreFront, target: string): string {
if (front.builtin) return `${front.id}.json`
const last = (target.split(/[?#]/)[0].split('/').pop() ?? '').trim()
if (last.toLowerCase().endsWith('.json')) return last
const slug = front.label.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-+|-+$/g, '')
return `${slug === '' ? 'store' : slug}.json`
}
/** A page drawn in the drawer's body. */
interface StorePage {
el: HTMLElement
destroy(): void
/**
* The catalogue this page is showing, once it has one.
*
* Every front has a file behind it and not one of them was reachable: a
* built-in's URL is never shown (RSG has no URL at all, shipping inline), and
* *copy link* copies a `?store=` link carrying an id rather than the JSON. So
* the one way to read what a store actually says was to guess the address.
* This is what the head's download hands over.
*/
fileNow(): StoreFile | null
}
export interface StoreDrawerOptions {
host: StoreHost
/** The drawer opened, closed or was resized, so the shell can tell the mounted view. */
onLayout?(): void
}
export class StoreDrawer {
readonly el: HTMLElement
/** The header button. */
readonly toggle: HTMLButtonElement
private readonly markSlot = el('span', { class: 'store-head-mark' })
private readonly downloadSlot = el('span', { class: 'store-head-actions' })
private readonly titleEl = el('h2', { class: 'store-title' })
private readonly blurbEl = el('p', { class: 'store-blurb' })
private readonly tilesSlot = el('div', { class: 'store-head-tiles' })
private readonly body = el('div', { class: 'store-body' })
private readonly unsubscribe: () => void
private current: {
front: StoreFront
view: StoreView
/** What `?store=` says: a shipped id, or a URL. */
target: string
page: StorePage
} | null = null
/** The facet keys the last write put in the address, to clear on the next. */
private written = new Set<string>()
/**
* Where each store was left, so reopening it lands there.
*
* A reader who narrowed ENCODE to CTCF on GRCh38, opened one file and comes
* back for another should not find the rail unticked: the page is torn down
* with the drawer, but its view is kept for the window's life, and the next
* `open` of that store rebuilds from it. A view arriving with a link wins.
*/
private readonly left = new Map<string, { view: StoreView; url?: string }>()
private width: number | null = readStoredWidth()
/** The front last opened in this drawer, custom included — see {@link open}. */
private lastOpened: string | null = null
constructor(private readonly options: StoreDrawerOptions) {
this.toggle = el('button', {
class: 'btn btn-icon',
type: 'button',
attrs: { 'aria-label': 'stores' },
})
this.toggle.addEventListener('click', () => (this.isOpen ? this.close() : this.open()))
this.paintToggle()
this.el = el(
'div',
{
class: 'store-drawer collapsed',
attrs: { role: 'region', 'aria-label': 'stores' },
},
el(
'div',
{ class: 'store-head' },
// The row of stores first, and the store it is *on* under it. The two
// were the other way round, and the head then opened with a name and a
// sentence about the store already chosen — which is the one thing a
// reader in this drawer already knows. What they came to the head for
// is the row: it is how the drawer switches. The two buttons stay up
// here with it, because a close is looked for at the top right corner
// of a panel and nowhere else.
el(
'div',
{ class: 'store-head-row' },
this.tilesSlot,
iconButton(
'link',
'Copy a link to this store, narrowed as it is now.',
() => void this.copyLink(),
{ class: 'btn btn-icon store-link', size: 14 },
),
iconButton('x', 'Close the drawer. Nothing is lost.', () => this.close(), {
class: 'btn-close',
size: 14,
}),
),
el(
'div',
{ class: 'store-head-current' },
this.markSlot,
el('div', { class: 'store-head-text' }, this.titleEl, this.blurbEl),
this.downloadSlot,
),
),
this.body,
this.handle(),
)
this.unsubscribe = subscribeStores(() => this.paintTiles())
window.addEventListener('keydown', this.onKeyDown)
window.addEventListener('resize', this.onResize)
}
get isOpen(): boolean {
return this.current !== null
}
/** The store on screen, for whoever asks. */
get storeId(): string | null {
return this.current?.front.id ?? null
}
/**
* Open a store — this one, the last one, or the first.
*
* Re-opening the store already on screen keeps its page: a reader who
* presses the tile of the store they are in should not lose the facets they
* ticked. A different view for the same store rebuilds it, which is what a
* link arriving does.
*/
open(id?: string, view?: StoreView, url?: string): void {
// The store this drawer was last in wins over the one the browser
// remembers across reloads: a reader who arrived on a store by URL and put
// the drawer down expects the same store back, and its URL is still in
// `left` for as long as this page lives — which is exactly as long as the
// remembered id is worth anything.
const wanted = id ?? this.lastOpened ?? readLast() ?? 'rsg'
const front = frontById(wanted) ?? frontById('rsg')
if (front === null) return
if (this.current !== null && this.current.front.id === front.id && view === undefined && url === undefined) {
this.paintTiles()
return
}
this.current?.page.destroy()
const kept = this.left.get(front.id)
const initial = view ?? kept?.view ?? EMPTY_VIEW
const page = this.build(front, initial, url ?? kept?.url)
this.current = {
front,
view: initial,
target: url ?? (front.builtin ? front.id : (front.rows?.url ?? front.id)),
page,
}
this.lastOpened = front.id
if (!isDoor(front.id)) writeLast(front.id)
this.markSlot.replaceChildren(storeMark(front.mark, 30))
this.titleEl.textContent = front.label
this.blurbEl.textContent = front.blurb
this.body.replaceChildren(page.el)
this.paintDownload()
this.body.scrollTop = 0
this.el.classList.remove('collapsed')
this.paintWidth()
this.paintTiles()
this.paintToggle()
this.writeQuery()
this.options.onLayout?.()
}
/**
* Land on what a `?store=` link named: a shipped id, or a URL to read.
*
* A URL opens the *add* tile with the box filled and the store read, which is
* where a reader who pastes one by hand ends up too — one road, arrived at
* from outside.
*/
openLink(target: string, view: StoreView): void {
if (/^https?:\/\//i.test(target)) {
// A hub link lands on the hub door rather than the store one. Both read
// the same URL through the same `fetchStore` and arrive at the same
// portal, so this changes nothing about what is shown — what it changes
// is which tile is lit and which sentence is over the box, and a reader
// who followed somebody's hub link should find the word *hub* where they
// landed.
this.open(looksLikeHubUrl(target) ? 'hub' : 'custom', view, target)
return
}
if (frontById(target) !== null) this.open(target, view)
}
/**
* Have the header button's next press land on this store, without opening
* the drawer.
*
* For the tutorial (§30), whose first step is that press: what it opens is
* the lab's store, whatever an earlier visit or a link left the drawer on, so
* that switching to 4DN's is a step of its own rather than one already taken.
*/
aim(id: string): void {
if (frontById(id) !== null) this.lastOpened = id
}
close(): void {
if (this.current === null) return
const { front, view, target } = this.current
this.left.set(front.id, {
view,
...(isDoor(front.id) && /^https?:\/\//i.test(target) ? { url: target } : {}),
})
this.current.page.destroy()
this.current = null
this.body.replaceChildren()
this.el.classList.add('collapsed')
this.paintToggle()
this.writeQuery()
this.options.onLayout?.()
}
/** The window or a column moved, so the width's ceiling has. */
relayout(): void {
if (this.current !== null) this.paintWidth()
}
destroy(): void {
this.unsubscribe()
window.removeEventListener('keydown', this.onKeyDown)
window.removeEventListener('resize', this.onResize)
this.current?.page.destroy()
this.el.remove()
}
// -------------------------------------------------------------------------
// Pages
// -------------------------------------------------------------------------
private build(front: StoreFront, view: StoreView, url?: string): StorePage {
const host = this.options.host
const onView = (next: StoreView): void => {
if (this.current === null || this.current.front.id !== front.id) return
this.current.view = next
this.writeQuery()
}
switch (front.kind) {
case 'gallery':
return new GalleryView({ front, host })
case 'genomes':
return new GenomesView({ front, host, onLoaded: () => this.paintDownload() })
case 'portal':
return new PortalView({ front, host, view, onView, onLoaded: () => this.paintDownload() })
// One view for both doors. What differs between them is the sentence over
// the box (`CustomView` reads `front.kind` for it) and nothing else: a
// hub read from either lands in the same portal, and is remembered and
// forgotten by the same two links.
case 'custom':
case 'hub':
return new CustomView({
front,
host,
view,
onView,
...(url === undefined ? {} : { url }),
onTarget: (loaded) => {
if (this.current !== null && this.current.front.id === front.id) {
this.current.target = loaded
this.writeQuery()
}
},
onName: (label, blurb) => {
// Only while this front is the one in front: a read that lands
// after the reader has moved on must not rename the store they
// moved to.
if (this.current === null || this.current.front.id !== front.id) return
this.titleEl.textContent = label
this.blurbEl.textContent = blurb
},
onChanged: () => this.paintTiles(),
onLoaded: () => this.paintDownload(),
})
}
}
// -------------------------------------------------------------------------
// Chrome
// -------------------------------------------------------------------------
/**
* The two buttons on the store's own line: where it came from, and the file.
*
* The **home** link is drawn whenever the front declares one, read or not —
* it is a fact about the store rather than about this reading of it, and a
* reader whose catalogue failed to load is exactly the one who wants the
* site it came from. It sits before the download because it is the older
* question: *whose is this* comes before *give me a copy*.
*
* The **download** is absent rather than disabled while a store is still
* being read or could not be (§8.5): a greyed button on a catalogue that
* failed to load says the file exists and this build will not give it to you,
* which is the one reading that is false.
*/
private paintDownload(): void {
this.downloadSlot.replaceChildren()
const current = this.current
if (current === null) return
const home = current.front.home
if (home !== undefined) {
this.downloadSlot.appendChild(
// An `<a>` and not a button that calls `window.open`: what this is *is*
// a link, so it gets the middle-click, the copy-link-address and the
// status bar that a reader expects of one — and `noopener` because the
// page it opens is somebody else's.
el(
'a',
{
class: 'btn btn-icon store-home',
attrs: {
href: home,
target: '_blank',
rel: 'noopener noreferrer',
title: `${current.front.label} on the web — opens in a new tab.`,
'aria-label': `${current.front.label} on the web`,
},
},
icon('arrow-up-right', { size: 14 }),
),
)
}
if (current.page.fileNow() === null) return
this.downloadSlot.appendChild(
iconButton(
'download',
`Download ${storeFileName(current.front, current.target)} — this catalogue as the drawer ` +
'has it, which is every row before your filters, with its addresses resolved.',
() => this.downloadStore(),
{ class: 'btn btn-icon', size: 14 },
),
)
}
/**
* Write the catalogue out.
*
* What is written is the file *as loaded* and not a copy of the bytes on the
* host: shards are merged into the one file the reader is looking at, and
* every `uri` is absolute, so what lands opens on its own — which a shard
* with a relative `base` would not. RSG has no bytes on a host to copy.
*/
private downloadStore(): void {
const current = this.current
const file = current?.page.fileNow() ?? null
if (current === null || file === null) return
void downloadBlob(
new Blob([`${JSON.stringify(file, null, 2)}\n`], { type: 'application/json' }),
storeFileName(current.front, current.target),
)
}
private paintTiles(): void {
this.tilesSlot.replaceChildren(
storeTiles({
fronts: storeFronts(),
size: 'small',
current: this.current?.front.id ?? null,
onPick: (id) => this.open(id === 'custom' ? customStore().id : id),
}),
)
}
private paintToggle(): void {
this.toggle.replaceChildren(icon('library'))
// **No list of names.** It named four — the lab's data, IGV's genomes, 4DN,
// ENCODE — while seven shipped, and a list kept anywhere but the registry
// (`ui/stores/registry.ts`) goes stale with the next store added. The
// drawer's own row of tiles names every one of them.
this.toggle.title = withKey(
`${this.isOpen ? 'Close' : 'Open'} the stores — every data store this viewer ships with, and any you connected`,
KEYS.stores,
)
this.toggle.setAttribute('aria-expanded', String(this.isOpen))
}
/**
* Escape puts the drawer down, on the Analysis drawer's terms and for its
* reasons: the bubble phase, never an event something else handled, and a
* caret in one of the drawer's own boxes keeps the key.
*/
private readonly onKeyDown = (event: KeyboardEvent): void => {
if (event.key !== 'Escape' || event.defaultPrevented) return
if (this.current === null) return
const active = document.activeElement
if (active instanceof HTMLElement && this.el.contains(active) && takesEscape(active)) return
event.preventDefault()
this.close()
}
private readonly onResize = (): void => this.relayout()
// -------------------------------------------------------------------------
// The address bar
// -------------------------------------------------------------------------
/** This store, narrowed as it is, as an address somebody else can open. */
private linkUrl(): string {
const params = new URLSearchParams(window.location.search)
// A link to a store is a link to the store: the page's own mounting
// parameters stay, the tab's view state does not.
if (this.current === null) {
params.delete('store')
writeStoreView(params, EMPTY_VIEW, this.written)
} else {
params.set('store', this.current.target)
writeStoreView(params, this.current.view, this.written)
}
const search = params.toString()
return `${window.location.origin}${window.location.pathname}${search === '' ? '' : `?${search}`}`
}
private async copyLink(): Promise<void> {
try {
await copyTextToClipboard(this.linkUrl())
messageToast('Link copied. It opens this store, narrowed as it is now.')
} catch (err) {
messageToast(`The link could not be copied: ${err instanceof Error ? err.message : String(err)}`)
}
}
/**
* Mirror the store and its view into the query string, replacing in place.
*
* Only the keys this drawer wrote are cleared on the way (`written`), so a
* parameter somebody else's deployment put in the address survives a store
* being opened and closed under it.
*/
private writeQuery(): void {
if (typeof window === 'undefined') return
const params = new URLSearchParams(window.location.search)
if (this.current === null) {
params.delete('store')
writeStoreView(params, EMPTY_VIEW, this.written)
this.written = new Set()
} else {
params.set('store', this.current.target)
writeStoreView(params, this.current.view, this.written)
this.written = new Set(this.current.view.facets.keys())
}
const search = params.toString()
const url = `${window.location.pathname}${search === '' ? '' : `?${search}`}${window.location.hash}`
const now = `${window.location.pathname}${window.location.search}${window.location.hash}`
if (url === now) return
window.history.replaceState(null, '', url)
}
// -------------------------------------------------------------------------
// Width
// -------------------------------------------------------------------------
private handle(): HTMLElement {
return resizeHandle({
// A left-sider: the handle is on its right edge, so rightward is wider.
side: 'left',
what: 'store drawer',
width: () => this.widthNow(),
resize: (px) => {
this.width = px
this.paintWidth()
},
commit: () => writeStoredWidth(this.widthNow()),
reset: () => {
this.width = null
writeStoredWidth(null)
this.paintWidth()
},
})
}
/** The body the drawer is laid over, which is what the fractions are of. */
private bodyWidth(): number {
const host = this.el.closest('.app-body') ?? this.el.parentElement
const width = host?.getBoundingClientRect().width ?? 0
return width > 0 ? width : window.innerWidth
}
private widthNow(): number {
const body = this.bodyWidth()
const max = Math.round(body * MAX_FRACTION)
const floor = Math.min(MIN_WIDTH, max)
return Math.max(floor, Math.min(max, this.width ?? Math.round(body * DEFAULT_FRACTION)))
}
private paintWidth(): void {
this.el.style.width = `${this.widthNow()}px`
}
}
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