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import type { ParserMessage } from "@shared/schema";
export function useOutputPanel(
hasCompilationErrors: boolean,
cliOutput: string,
parserMessages: ParserMessage[],
lastCompilationResult: "success" | "error" | null,
parserMessagesContainerRef: React.RefObject<HTMLDivElement>,
showCompilationOutput: boolean,
setShowCompilationOutput: (value: boolean | ((prev: boolean) => boolean)) => void,
setParserPanelDismissed: (value: boolean) => void,
setActiveOutputTab: (tab: "compiler" | "messages" | "registry" | "debug") => void,
code: string,
) {
const outputPanelRef = useRef<any>(null);
const outputTabsHeaderRef = useRef<HTMLDivElement | null>(null);
const [outputPanelMinPercent, setOutputPanelMinPercent] = useState<number>(3);
const [compilationPanelSize, setCompilationPanelSize] = useState(3);
const [outputPanelManuallyResized, setOutputPanelManuallyResized] = useState(false);
const outputPanelManuallyResizedRef = useRef(false);
// Helper function to open the output panel (via double-click on tabs)
const openOutputPanel = useCallback(
(targetTab: "compiler" | "messages" | "registry" | "debug") => {
// Mark as manually resized FIRST before showing panel (update both state and ref)
outputPanelManuallyResizedRef.current = true;
setOutputPanelManuallyResized(true);
setShowCompilationOutput(true);
setParserPanelDismissed(false);
setActiveOutputTab(targetTab);
// Resize panel to 50% directly without triggering compilationPanelSize state
// This prevents the auto-sizing useEffect from interfering
requestAnimationFrame(() => {
Eif (
outputPanelRef.current &&
typeof outputPanelRef.current.resize === "function"
) {
outputPanelRef.current.resize(50);
// Update state after to reflect the manual size
setCompilationPanelSize(50);
}
});
},
[setShowCompilationOutput, setParserPanelDismissed, setActiveOutputTab],
);
useEffect(() => {
const handler = (ev: any) => {
try {
const newValue = Boolean(ev?.detail?.value);
setShowCompilationOutput(newValue);
// Reset manual resize flag when toggling panel visibility (update both ref and state)
outputPanelManuallyResizedRef.current = false;
setOutputPanelManuallyResized(false);
// Persist to localStorage
try {
window.localStorage.setItem(
"unoShowCompileOutput",
newValue ? "1" : "0",
);
} catch {
// localStorage may be unavailable (private browsing, etc.)
}
} catch {
// ignore
}
};
document.addEventListener(
"showCompileOutputChange",
handler as EventListener,
);
return () =>
document.removeEventListener(
"showCompileOutputChange",
handler as EventListener,
);
}, [setShowCompilationOutput]);
// Persist showCompilationOutput state to localStorage whenever it changes
useEffect(() => {
try {
window.localStorage.setItem(
"unoShowCompileOutput",
showCompilationOutput ? "1" : "0",
);
} catch {
// localStorage may be unavailable (private browsing, etc.)
}
}, [showCompilationOutput]);
// Update compilation panel size based on error content and parser messages
useEffect(() => {
// Reset parserPanelDismissed when new errors occur (auto-reopen logic)
if (hasCompilationErrors && cliOutput.trim().length > 0) {
setParserPanelDismissed(false);
setShowCompilationOutput(true);
// Only auto-size if user hasn't manually resized
if (!outputPanelManuallyResized) {
// Auto-show and size panel for compiler errors
const lines = cliOutput.split("\n").length;
const totalChars = cliOutput.length;
const HEADER_HEIGHT = 50;
const PER_LINE = 20;
const PADDING = 60;
const AVAILABLE_HEIGHT = 800;
const lineBasedPx =
HEADER_HEIGHT +
PADDING +
Math.max(lines, Math.ceil(totalChars / 80)) * PER_LINE;
const newSize = Math.min(
75,
Math.max(25, Math.ceil((lineBasedPx / AVAILABLE_HEIGHT) * 100)),
);
setCompilationPanelSize(newSize);
}
} else if (parserMessages.length > 0 && !hasCompilationErrors) {
// Reset dismissal flag and show panel for new parser messages (auto-reopen)
setParserPanelDismissed(false);
setShowCompilationOutput(true);
setActiveOutputTab("messages");
// Only auto-size if user hasn't manually resized
Eif (!outputPanelManuallyResized) {
// Auto-show and size panel for parser messages (spec 3.2)
const messageCount = parserMessages.length;
const totalMessageLength = parserMessages.reduce(
(sum, msg) => sum + (msg.message?.length || 0),
0,
);
const HEADER_HEIGHT = 50;
const PER_MESSAGE_BASE = 55;
const PADDING = 60;
const AVAILABLE_HEIGHT = 800;
// SSOT formula (based on count + text length)
const estimatedPx =
HEADER_HEIGHT +
PADDING +
messageCount * PER_MESSAGE_BASE +
Math.ceil(totalMessageLength / 100) * 15;
const estimatedPercent = Math.min(
75,
Math.max(25, Math.ceil((estimatedPx / AVAILABLE_HEIGHT) * 100)),
);
// Measure rendered message container to ensure all containers stay visible
const headerEl = outputTabsHeaderRef.current;
const headerHeightPx = headerEl
? Math.ceil(headerEl.getBoundingClientRect().height || HEADER_HEIGHT)
: HEADER_HEIGHT;
let measuredPercent = estimatedPercent;
try {
const panelNode = headerEl?.closest("[data-panel]") as
| HTMLElement
| null;
const groupNode = panelNode?.parentElement as HTMLElement | null;
const groupHeightPx = Math.ceil(
groupNode?.getBoundingClientRect().height || 0,
);
const messagesHeightPx = parserMessagesContainerRef.current
? Math.ceil(parserMessagesContainerRef.current.scrollHeight)
: 0;
Iif (groupHeightPx > 0) {
const measuredPx = headerHeightPx + messagesHeightPx;
measuredPercent = Math.min(
75,
Math.max(25, Math.ceil((measuredPx / groupHeightPx) * 100)),
);
}
} catch {
// Fallback to estimatedPercent
}
const newSize = Math.min(75, Math.max(25, Math.max(estimatedPercent, measuredPercent)));
setCompilationPanelSize(newSize);
}
} else if (
lastCompilationResult === "success" &&
!hasCompilationErrors &&
parserMessages.length === 0
) {
// Only auto-minimize if user hasn't manually resized
Eif (!outputPanelManuallyResized) {
// Minimize panel when no errors and no messages (keep visible at 3%)
setCompilationPanelSize(3);
}
}
}, [
cliOutput,
hasCompilationErrors,
lastCompilationResult,
parserMessages.length,
outputPanelManuallyResized,
setParserPanelDismissed,
setShowCompilationOutput,
setActiveOutputTab,
]);
// Apply panel size imperatively to ResizablePanel using absolute pixel floor
const enforceOutputPanelFloor = useCallback(
(forceResize: boolean = false) => {
if (!showCompilationOutput) return;
// ALWAYS skip auto-sizing if user manually resized the panel - use REF for current value (avoids stale closure)
if (outputPanelManuallyResizedRef.current) return;
const headerEl = outputTabsHeaderRef.current;
const panelHandle = outputPanelRef.current;
Eif (!headerEl || !panelHandle) return;
const panelNode = headerEl.closest("[data-panel]") as HTMLElement | null;
const groupNode = panelNode?.parentElement as HTMLElement | null;
Iif (!panelNode || !groupNode) return;
const headerRect = headerEl.getBoundingClientRect();
const headerHeight = Math.ceil(headerRect.height);
const groupHeight = Math.ceil(groupNode.getBoundingClientRect().height);
if (!groupHeight || headerHeight <= 0) return;
// Enforce absolute minimum height (px) equal to the header height (plus 0 gap target).
// The panel is the bottom panel; keeping it at header height keeps the header near the bottom edge.
const absoluteMinPx = headerHeight;
const currentMinPx = parseInt(panelNode.style.minHeight || "0", 10);
Iif (Number.isNaN(currentMinPx) || currentMinPx !== absoluteMinPx) {
panelNode.style.minHeight = `${absoluteMinPx}px`;
}
// Convert absolute floor to percentage only for library API calls
const minPercent = Math.max((absoluteMinPx / groupHeight) * 100, 3);
const targetMinPercent = Math.min(75, minPercent);
setOutputPanelMinPercent((prev) =>
Math.abs(prev - targetMinPercent) > 0.01 ? targetMinPercent : prev,
);
if (
typeof panelHandle.getSize === "function" &&
typeof panelHandle.resize === "function"
) {
const currentSize = panelHandle.getSize();
if (typeof currentSize === "number") {
const target = forceResize
? targetMinPercent // when forced (e.g., example load), snap to computed floor
: Math.max(currentSize, targetMinPercent);
if (Math.abs(currentSize - target) > 0.01) {
panelHandle.resize(target);
}
}
}
},
[showCompilationOutput],
);
useEffect(() => {
// Only auto-resize if not manually resized by user (use ref for current value)
if (
!outputPanelManuallyResizedRef.current &&
outputPanelRef.current &&
typeof outputPanelRef.current.resize === "function"
) {
outputPanelRef.current.resize(compilationPanelSize);
}
}, [compilationPanelSize, outputPanelManuallyResized]);
useEffect(() => {
const handleResize = () =>
requestAnimationFrame(() => enforceOutputPanelFloor(false)); // Don't force resize on window resize
const handleUiScale: EventListener = () => {
// Double rAF to ensure CSS has fully applied and DOM has re-rendered
requestAnimationFrame(() => {
requestAnimationFrame(() => {
enforceOutputPanelFloor(true); // Force resize on scale change
// Additional delayed enforcement for complex layout changes
setTimeout(() => enforceOutputPanelFloor(true), 50);
});
});
};
window.addEventListener("resize", handleResize);
window.addEventListener("uiFontScaleChange", handleUiScale);
document.addEventListener("uiFontScaleChange", handleUiScale);
return () => {
window.removeEventListener("resize", handleResize);
window.removeEventListener("uiFontScaleChange", handleUiScale);
document.removeEventListener("uiFontScaleChange", handleUiScale);
};
}, [enforceOutputPanelFloor]);
// ResizeObserver to continuously enforce floor when panel group size changes (e.g., when dragging divider)
useEffect(() => {
if (!showCompilationOutput) return;
const headerEl = outputTabsHeaderRef.current;
const panelNode = headerEl?.closest("[data-panel]") as HTMLElement | null;
const groupNode = panelNode?.parentElement as HTMLElement | null;
if (!groupNode) return;
const observer = new ResizeObserver(() => {
requestAnimationFrame(() => enforceOutputPanelFloor(false)); // Don't force on group resize
});
observer.observe(groupNode);
return () => observer.disconnect();
}, [showCompilationOutput, enforceOutputPanelFloor]);
// Initial floor enforcement on first layout
useEffect(() => {
// Run after first paint to ensure DOM sizes are available
requestAnimationFrame(() => enforceOutputPanelFloor(true));
}, [enforceOutputPanelFloor]);
// Re-enforce output panel floor when code changes (e.g., loading new example)
// Use iterative correction loop until gap reaches 0, same approach as ResizeObserver
useEffect(() => {
let cancelled = false;
let attempts = 0;
const maxAttempts = 10;
const correctUntilFlush = () => {
Iif (cancelled || attempts >= maxAttempts) return;
attempts++;
const headerEl = outputTabsHeaderRef.current;
Eif (!headerEl) return;
const panelNode = headerEl.closest("[data-panel]") as HTMLElement | null;
const groupNode = panelNode?.parentElement as HTMLElement | null;
Iif (!panelNode || !groupNode) return;
const headerRect = headerEl.getBoundingClientRect();
const groupRect = groupNode.getBoundingClientRect();
const gap = Math.round(groupRect.bottom - headerRect.bottom);
enforceOutputPanelFloor(true);
// If gap still exists, schedule another correction
if (gap > 1) {
requestAnimationFrame(correctUntilFlush);
}
};
// Start after a brief delay to let DOM settle
const timeoutId = setTimeout(() => {
requestAnimationFrame(correctUntilFlush);
}, 50);
return () => {
cancelled = true;
clearTimeout(timeoutId);
};
}, [code, enforceOutputPanelFloor]);
const handleOnResizeOutputPanel = useCallback(() => {
outputPanelManuallyResizedRef.current = true;
setOutputPanelManuallyResized(true);
}, []);
return {
outputPanelRef,
outputTabsHeaderRef,
outputPanelMinPercent,
compilationPanelSize,
setCompilationPanelSize,
outputPanelManuallyResized,
setOutputPanelManuallyResized,
outputPanelManuallyResizedRef,
openOutputPanel,
enforceOutputPanelFloor,
handleOnResizeOutputPanel,
};
}
|