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import { Logger } from "@shared/logger";
const logger = new Logger("MobileLayout");
export function useMobileLayout() {
const isClient = globalThis.window !== undefined;
const mqQuery = "(max-width: 768px)";
const initialIsMobile = isClient ? globalThis.matchMedia(mqQuery).matches : false;
const [isMobile, setIsMobile] = useState<boolean>(initialIsMobile);
const [mobilePanel, setMobilePanel] = useState<"code" | "compile" | "serial" | "board" | null>(
initialIsMobile ? "code" : null,
);
const [headerHeight, setHeaderHeight] = useState<number>(40);
const [overlayZ, setOverlayZ] = useState<number>(30);
// Media query listener for responsive layout
useEffect(() => {
Iif (!isClient) return;
const mq = globalThis.matchMedia(mqQuery);
const onChange = (e: MediaQueryListEvent | MediaQueryList) => {
const matches = "matches" in e ? e.matches : mq.matches;
setIsMobile(matches);
// If switching into mobile mode, open code panel immediately
if (matches && !mobilePanel) setMobilePanel("code");
// If switching out of mobile, close any mobile panel
if (!matches) setMobilePanel(null);
};
// Modern browsers: addEventListener
mq.addEventListener("change", onChange as any);
return () => {
mq.removeEventListener("change", onChange as any);
};
}, [isClient, mobilePanel]);
// Prevent body scroll when mobile panel is open
useEffect(() => {
Iif (!isClient) return;
const prev = document.body.style.overflow;
if (mobilePanel) {
document.body.style.overflow = "hidden";
} else {
document.body.style.overflow = prev || "";
}
return () => {
document.body.style.overflow = prev || "";
};
}, [mobilePanel, isClient]);
// Compute header height and overlay z-index
useEffect(() => {
Iif (!isClient) return;
const measure = () => {
// First try to find our mobile header by data attribute
let hdr: Element | null = document.querySelector("[data-mobile-header]");
// Fallback to <header> tag
hdr ??= document.querySelector("header");
if (!hdr) {
const all = Array.from<HTMLElement>(
document.body.querySelectorAll<HTMLElement>("*"),
);
hdr =
all.find((el) => {
Iif (!el) return false;
// ignore html/body
Iif (el === document.body || el === document.documentElement)
return false;
const style = getComputedStyle(el);
Eif (
style.display === "none" ||
style.visibility === "hidden" ||
Number(style.opacity) === 0
)
return false;
const r = el.getBoundingClientRect();
// must be near the top and reasonably small (not full-page)
if (r.top < -5 || r.top > 48) return false;
if (r.height < 24 || r.height > globalThis.innerHeight / 2)
return false;
return true;
}) || null;
}
Iif (hdr === document.body || hdr === document.documentElement) hdr = null;
let h = 40;
if (hdr) {
const rect = (hdr as HTMLElement).getBoundingClientRect();
Eif (rect.height > 0 && rect.height < globalThis.innerHeight / 2)
h = Math.ceil(rect.height);
}
setHeaderHeight(h);
let z = 0;
if (hdr) {
const zStr = getComputedStyle(hdr as HTMLElement).zIndex;
const zNum = Number.parseInt(zStr || "", 10);
z = Number.isFinite(zNum) ? zNum : 0;
}
const chosenZ = z > 0 ? Math.max(z - 1, 5) : 30;
setOverlayZ(chosenZ);
logger.debug(
`[mobile overlay] header detect: ${hdr?.tagName ?? "null"} headerHeight=${h} overlayZ=${chosenZ}`,
);
};
measure();
globalThis.addEventListener("resize", measure);
const hdr = document.querySelector("header");
if (hdr) {
const obs = new MutationObserver(measure);
obs.observe(hdr, { attributes: true, childList: true, subtree: true });
return () => {
globalThis.removeEventListener("resize", measure);
obs.disconnect();
};
}
return () => {
globalThis.removeEventListener("resize", measure);
};
}, [isClient]);
return {
isMobile,
mobilePanel,
setMobilePanel,
headerHeight,
overlayZ,
};
}
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