mirror of
https://github.com/xiaoqidun/ofdgo.git
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325 lines
14 KiB
JavaScript
325 lines
14 KiB
JavaScript
export class DocumentDialogs {
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constructor({ document: root = document, targets = [], titlebar = null } = {}) {
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Object.assign(this, { document: root, targets, titlebar, owner: null, records: new Map(), tabs: new Map(), released: new WeakSet(), inert: new Map(), styles: new Map() });
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this.backdrop = root.createElement("div");
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this.backdrop.className = "document-dialog-backdrop";
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this.backdrop.hidden = true;
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Object.assign(this.backdrop.style, { position: "fixed", inset: "0", background: "rgb(31 36 40 / 18%)", zIndex: "1000" });
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root.body.append(this.backdrop);
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root.addEventListener("keydown", event => {
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if (event.defaultPrevented || this.applicationOpen()) return;
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const panel = this.current()?.stack.at(-1);
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if (!panel) return;
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if (event.key === "Tab" && !event.ctrlKey && !event.altKey && !event.metaKey) {
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const selector = "button, input, select, textarea, a[href], [tabindex], [contenteditable=true]";
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const elements = [this.titlebar, panel].filter(Boolean).flatMap(root => [...root.querySelectorAll(selector)])
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.filter(node => node.tabIndex >= 0 && !node.disabled && !node.closest("[inert]") && node.getClientRects().length);
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const index = elements.indexOf(root.activeElement), direction = event.shiftKey ? -1 : 1;
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const target = index < 0 ? event.shiftKey ? elements.at(-1) : elements[0] : elements[(index + direction + elements.length) % elements.length];
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event.preventDefault();
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if (target) target.focus();
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else panel.focus();
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return;
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}
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if (event.key !== "Escape") return;
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event.preventDefault();
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event.stopPropagation();
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this.cancel(panel);
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}, true);
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this.backdrop.addEventListener("pointerdown", event => { event.preventDefault(); this.focus(); });
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root.defaultView.addEventListener("resize", () => this.paint());
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}
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register(panel, { shared = true, persistent = false } = {}) {
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if (this.records.has(panel)) return panel;
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const record = { show: panel.show.bind(panel), showModal: panel.showModal.bind(panel), close: panel.close.bind(panel), owner: null, application: false, shared, clicks: new WeakMap(), initial: shared && !persistent ? this.snapshot(panel) : null };
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this.records.set(panel, record);
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panel.showModal = panel.show = () => this.openFor(this.owner, panel);
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panel.close = value => {
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if (record.application) record.close(value);
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else this.closeFor(this.owner, panel, value);
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};
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panel.requestClose = value => {
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if (record.application) {
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const event = new this.document.defaultView.Event("cancel", { cancelable: true });
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if (panel.dispatchEvent(event)) record.close(value);
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} else this.cancel(panel, value);
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};
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panel.addEventListener("close", () => {
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if (record.application) { record.application = false; this.paint(); }
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});
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panel.addEventListener("click", event => { record.clicks.set(event, this.owner); }, true);
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panel.addEventListener("click", event => {
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if (!record.application && (record.clicks.get(event) !== this.owner || !this.current()?.stack.includes(panel))) event.preventDefault();
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});
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panel.addEventListener("submit", event => {
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if (record.application || event.defaultPrevented) return;
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const method = event.submitter?.getAttribute("formmethod") || event.target.getAttribute("method");
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if (method?.toLowerCase() !== "dialog") return;
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event.preventDefault();
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this.closeFor(this.owner, panel, event.submitter?.value || "");
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});
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return panel;
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}
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current(tab = this.owner) {
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return tab ? this.tabs.get(tab) : null;
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}
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entry(tab, panel) {
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if (!tab || this.released.has(tab)) throw new Error("Document dialog owner is unavailable");
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this.register(panel);
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if (!this.tabs.has(tab)) this.tabs.set(tab, { entries: new Map(), stack: [] });
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const entries = this.tabs.get(tab).entries;
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if (!entries.has(panel)) entries.set(panel, { snapshot: this.records.get(panel).initial, setup: [], updates: [], resolve: null, promise: null });
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return entries.get(panel);
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}
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setOwner(tab) {
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if (this.owner === tab) return;
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if (this.owner) this.suspend(this.owner);
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if (tab) this.restore(tab);
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}
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openFor(tab, panel, setup) {
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const entry = this.entry(tab, panel);
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if (setup) entry.setup.push(setup);
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const state = this.tabs.get(tab);
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state.stack = state.stack.filter(value => value !== panel);
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state.stack.push(panel);
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if (tab !== this.owner) return panel;
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this.unpaint();
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this.records.get(panel).owner = tab;
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this.prepare(entry, panel);
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if (!this.records.get(panel).shared) this.document.body.append(panel);
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if (!panel.open) this.records.get(panel).show();
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this.paint();
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this.focus();
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return panel;
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}
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request(panel, tab = this.owner, setup) {
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if (!tab || this.released.has(tab)) return Promise.resolve(null);
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const entry = this.entry(tab, panel);
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if (entry.promise) return entry.promise;
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entry.promise = new Promise(resolve => { entry.resolve = resolve; });
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const promise = entry.promise;
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this.openFor(tab, panel, setup);
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return promise;
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}
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updateFor(tab, panel, setup) {
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if (!tab || this.released.has(tab)) return false;
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const entry = this.current(tab)?.entries.get(panel);
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if (!entry) return false;
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if (tab === this.owner && this.records.get(panel).owner === tab) setup(panel);
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else entry.updates.push(setup);
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return true;
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}
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closeFor(tab, panel, value) {
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const state = this.current(tab), entry = state?.entries.get(panel);
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if (!state?.stack.includes(panel)) return;
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const visible = tab === this.owner;
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if (visible) {
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this.unpaint();
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if (value !== undefined) panel.returnValue = String(value);
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panel.removeAttribute("open");
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if (this.records.get(panel).initial) entry.snapshot = this.snapshot(panel);
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}
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const result = value === undefined ? visible ? panel.returnValue : entry.snapshot?.returnValue ?? panel.returnValue : String(value);
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state.stack = state.stack.filter(value => value !== panel);
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const resolve = entry.resolve;
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entry.resolve = entry.promise = null;
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entry.setup = [];
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if (visible) {
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this.paint();
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panel.dispatchEvent(new this.document.defaultView.Event("close"));
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this.focus();
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}
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resolve?.(result);
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}
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cancel(panel, value) {
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const event = new this.document.defaultView.Event("cancel", { cancelable: true });
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if (panel.dispatchEvent(event)) this.closeFor(this.owner, panel, value);
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}
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suspend(tab) {
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if (tab !== this.owner) return;
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this.unpaint();
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for (const [panel, entry] of this.current(tab)?.entries || []) {
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const record = this.records.get(panel);
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if (record.application || record.owner !== tab) continue;
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if (record.initial) entry.snapshot = this.snapshot(panel);
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else if (!record.shared) {
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entry.focus = panel.contains(this.document.activeElement) ? this.document.activeElement : null;
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panel.remove();
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}
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panel.removeAttribute("open");
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}
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this.owner = null;
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this.paint();
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}
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restore(tab) {
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if (!tab || this.released.has(tab)) return false;
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if (this.owner === tab) return true;
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if (this.owner) this.suspend(this.owner);
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if (!this.tabs.has(tab)) this.tabs.set(tab, { entries: new Map(), stack: [] });
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this.owner = tab;
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const state = this.current(tab);
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for (const [panel, entry] of state.entries) {
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const record = this.records.get(panel);
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if (record.application) continue;
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if (record.initial) this.applySnapshot(entry.snapshot, panel);
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else if (!record.shared) this.document.body.append(panel);
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record.owner = tab;
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}
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for (const [panel, entry] of state.entries) {
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if (this.records.get(panel).application) continue;
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for (const update of entry.updates.splice(0)) update(panel);
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}
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for (const panel of state.stack) {
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this.prepare(state.entries.get(panel), panel);
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if (!panel.open) this.records.get(panel).show();
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}
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this.paint();
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this.focus(true);
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return true;
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}
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release(tab) {
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if (!tab || this.released.has(tab)) return;
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const visible = this.owner === tab;
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if (visible) this.suspend(tab);
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const state = this.current(tab);
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this.tabs.delete(tab);
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this.released.add(tab);
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for (const entry of state?.entries.values() || []) entry.resolve?.(null);
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for (const [panel] of state?.entries || []) {
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const record = this.records.get(panel);
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if (!record.shared) {
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panel.remove();
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this.records.delete(panel);
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continue;
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}
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if (record.application || record.owner !== tab) continue;
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if (record.initial) this.applySnapshot(record.initial, panel);
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record.owner = null;
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}
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state?.entries.clear();
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if (state) state.stack.length = 0;
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}
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showApplication(panel) {
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this.register(panel);
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if ([...this.tabs.values()].some(state => state.stack.includes(panel))) throw new Error("Document dialog is already in use");
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const record = this.records.get(panel);
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record.application = true;
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try { record.showModal(); }
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catch (error) { record.application = false; throw error; }
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}
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applicationOpen() {
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return [...this.records.values()].some(record => record.application);
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}
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prepare(entry, panel) {
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for (const setup of entry.setup.splice(0)) setup(panel);
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}
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snapshot(panel) {
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const nodes = [panel, ...panel.querySelectorAll("*")].map(node => ({ node,
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children: [...node.childNodes], attributes: [...node.attributes].filter(attribute => node !== panel || attribute.name !== "open").map(attribute => [attribute.name, attribute.value]),
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value: "value" in node && node.type !== "file" ? node.value : undefined,
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checked: node.checked, indeterminate: node.indeterminate, selected: node.selected,
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files: node.type === "file" ? [...node.files] : undefined, scrollTop: node.scrollTop, scrollLeft: node.scrollLeft,
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selectionStart: node.selectionStart, selectionEnd: node.selectionEnd, selectionDirection: node.selectionDirection,
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text: [...node.childNodes].filter(child => child.nodeType === 3).map(child => [child, child.data]) }));
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const focus = panel.contains(this.document.activeElement) ? this.document.activeElement : null;
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const range = this.document.getSelection();
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const selection = !focus?.matches("input, textarea") && range?.anchorNode && panel.contains(range.anchorNode) && panel.contains(range.focusNode)
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? { anchor: range.anchorNode, start: range.anchorOffset, focus: range.focusNode, end: range.focusOffset } : null;
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return { nodes, focus, selection, returnValue: panel.returnValue };
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}
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applySnapshot(snapshot, panel) {
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panel.removeAttribute("open");
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for (const item of snapshot.nodes) {
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const { node, children, attributes } = item;
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if (node.childNodes.length !== children.length || children.some((child, index) => node.childNodes[index] !== child)) node.replaceChildren(...children);
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for (const attribute of [...node.attributes]) if (!attributes.some(([name]) => name === attribute.name)) node.removeAttribute(attribute.name);
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for (const [name, value] of attributes) if (node.getAttribute(name) !== value) node.setAttribute(name, value);
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for (const [text, value] of item.text) text.data = value;
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}
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for (const item of snapshot.nodes) {
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const { node } = item;
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if (item.value !== undefined && node.tagName !== "SELECT") node.value = item.value;
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for (const key of ["checked", "indeterminate", "selected"]) if (item[key] !== undefined) node[key] = item[key];
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if (item.files !== undefined) {
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const transfer = new this.document.defaultView.DataTransfer();
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for (const file of item.files) transfer.items.add(file);
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node.files = transfer.files;
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}
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if (item.selectionStart != null && typeof node.setSelectionRange === "function") node.setSelectionRange(item.selectionStart, item.selectionEnd, item.selectionDirection);
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node.scrollTop = item.scrollTop;
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node.scrollLeft = item.scrollLeft;
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}
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panel.returnValue = snapshot.returnValue;
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}
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unpaint() {
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for (const [node, value] of this.inert) node.inert = value;
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this.inert.clear();
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for (const [panel, styles] of this.styles) for (const [name, [value, priority]] of styles) {
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if (value) panel.style.setProperty(name, value, priority);
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else panel.style.removeProperty(name);
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}
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this.styles.clear();
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}
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paint() {
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this.unpaint();
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const stack = this.current()?.stack || [];
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const top = stack.at(-1);
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this.backdrop.hidden = !top;
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if (!top) return;
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const inset = Math.max(0, this.titlebar?.getBoundingClientRect().bottom || 0);
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this.backdrop.style.top = `${inset}px`;
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this.backdrop.style.zIndex = String(1000 + (stack.length - 1) * 2);
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const disable = node => {
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if (!node || node === this.titlebar || node === this.backdrop || this.records.has(node)) return;
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if (node.contains(this.titlebar) || [...this.records.keys()].some(panel => node.contains(panel))) {
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for (const child of node.children) disable(child);
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return;
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}
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if (!this.inert.has(node)) this.inert.set(node, node.inert);
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node.inert = true;
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};
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for (const target of typeof this.targets === "function" ? this.targets() : this.targets) disable(target);
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for (const [index, panel] of stack.entries()) {
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if (panel !== top) { this.inert.set(panel, panel.inert); panel.inert = true; }
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const values = { position: "fixed", inset: `${inset}px 0 0`, zIndex: String(1001 + index * 2), maxHeight: `calc(100dvh - ${inset + 24}px)`, "--dialog-inset": `${inset}px` };
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const styles = new Map();
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for (const [key, value] of Object.entries(values)) {
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const name = key.replace(/[A-Z]/g, letter => `-${letter.toLowerCase()}`);
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styles.set(name, [panel.style.getPropertyValue(name), panel.style.getPropertyPriority(name)]);
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panel.style.setProperty(name, value);
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}
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this.styles.set(panel, styles);
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}
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}
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focus(restore = false) {
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const panel = this.current()?.stack.at(-1);
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if (!panel || this.applicationOpen()) return;
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const saved = restore ? this.current().entries.get(panel)?.snapshot?.focus || this.current().entries.get(panel)?.focus : null;
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const target = saved?.isConnected && panel.contains(saved) ? saved : panel.querySelector("[autofocus], button:not(:disabled), input:not(:disabled), select:not(:disabled), textarea:not(:disabled), [tabindex]") || panel;
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if (restore || !panel.contains(this.document.activeElement)) target.focus({ preventScroll: true });
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const selection = restore && this.current().entries.get(panel)?.snapshot?.selection;
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if (selection?.anchor?.isConnected && selection.focus?.isConnected) this.document.getSelection().setBaseAndExtent(selection.anchor, selection.start, selection.focus, selection.end);
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if (restore) for (const item of this.current().entries.get(panel)?.snapshot?.nodes || []) { item.node.scrollTop = item.scrollTop; item.node.scrollLeft = item.scrollLeft; }
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}
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}
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