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94 lines
3.3 KiB
TypeScript
94 lines
3.3 KiB
TypeScript
import { lazy, Suspense, useEffect, useState } from "react";
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import { useLocation } from "react-router";
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import { t } from "@lingui/core/macro";
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import { useAuth } from "../hooks/useAuth.ts";
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const DumpCreateModal = lazy(() =>
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import("./DumpCreateModal.tsx").then((m) => ({ default: m.DumpCreateModal }))
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);
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/**
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* Floating "new dump" button shown once the header has scrolled out of view.
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* Sits in the bottom-right corner and lifts above the global player (which is
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* full-width on mobile) so the two never overlap. Only rendered for signed-in
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* users — dump creation requires an account.
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*
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* Mounted once at the app root (not per-page) since some pages render their own
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* header instead of going through PageShell. Visibility is derived from a live
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* read of the current page's `.app-header`, so it survives client-side
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* navigation and lazily-mounted route headers.
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*/
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export function DumpFab() {
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const { user } = useAuth();
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const location = useLocation();
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const [headerHidden, setHeaderHidden] = useState(false);
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const [modalOpen, setModalOpen] = useState(false);
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// Reserve clearance at the end of the scroll so the floating button never
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// hides the last content when scrolled all the way down.
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useEffect(() => {
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if (!user) return;
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document.body.classList.add("has-fab");
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return () => document.body.classList.remove("has-fab");
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}, [user]);
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// Reveal the button once the header's bottom edge scrolls above the viewport.
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// Re-reading the header on every tick keeps this correct across navigation
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// and lazily-mounted pages, where the header element is replaced.
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useEffect(() => {
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if (!user) return;
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const update = () => {
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const header = document.querySelector(".app-header");
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setHeaderHidden(!!header && header.getBoundingClientRect().bottom <= 0);
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};
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update();
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globalThis.addEventListener("scroll", update, { passive: true });
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globalThis.addEventListener("resize", update);
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// Body height changes when a lazy route finishes mounting — re-check then,
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// since no scroll/resize event fires in that case.
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const ro = new ResizeObserver(update);
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ro.observe(document.body);
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return () => {
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globalThis.removeEventListener("scroll", update);
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globalThis.removeEventListener("resize", update);
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ro.disconnect();
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};
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}, [user, location.pathname]);
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if (!user) return null;
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return (
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<>
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<button
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type="button"
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className={`dump-fab${headerHidden ? " dump-fab--visible" : ""}`}
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aria-label={t`New dump`}
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title={t`New dump`}
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aria-hidden={!headerHidden}
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tabIndex={headerHidden ? 0 : -1}
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onClick={() => setModalOpen(true)}
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>
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{/* Symmetric SVG plus — centers exactly via flex, regardless of the
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theme's font metrics (a text "+" sits slightly off the box center). */}
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<svg
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className="dump-fab-icon"
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viewBox="0 0 24 24"
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fill="none"
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stroke="currentColor"
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strokeWidth={2.5}
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strokeLinecap="round"
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aria-hidden="true"
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>
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<line x1="12" y1="5" x2="12" y2="19" />
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<line x1="5" y1="12" x2="19" y2="12" />
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</svg>
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</button>
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{modalOpen && (
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<Suspense>
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<DumpCreateModal onClose={() => setModalOpen(false)} />
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</Suspense>
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)}
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</>
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);
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}
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