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"use client";
import { useRef, useState, useEffect, useCallback, useMemo } from "react";
import { useUpdateEffect } from "react-use";
import classNames from "classnames";
import { cn } from "@/lib/utils";
import { GridPattern } from "@/components/magic-ui/grid-pattern";
import { useEditor } from "@/hooks/useEditor";
import { useAi } from "@/hooks/useAi";
import { htmlTagToText } from "@/lib/html-tag-to-text";
import { AnimatedBlobs } from "@/components/animated-blobs";
import { AiLoading } from "../ask-ai/loading";
import { defaultHTML } from "@/lib/consts";
import { HistoryNotification } from "../history-notification";
import { api } from "@/lib/api";
import { toast } from "sonner";
export const Preview = ({ isNew }: { isNew: boolean }) => {
const {
project,
device,
isLoadingProject,
currentTab,
currentCommit,
setCurrentCommit,
currentPageData,
pages,
setPages,
setCurrentPage,
previewPage,
setPreviewPage,
} = useEditor();
const {
isEditableModeEnabled,
setSelectedElement,
isAiWorking,
globalAiLoading,
} = useAi();
const iframeRef = useRef<HTMLIFrameElement>(null);
const [hoveredElement, setHoveredElement] = useState<{
tagName: string;
rect: { top: number; left: number; width: number; height: number };
} | null>(null);
const [isPromotingVersion, setIsPromotingVersion] = useState(false);
const [stableHtml, setStableHtml] = useState<string>("");
const [throttledHtml, setThrottledHtml] = useState<string>("");
const lastUpdateTimeRef = useRef<number>(0);
useEffect(() => {
if (!previewPage && pages.length > 0) {
const indexPage = pages.find(
(p) => p.path === "index.html" || p.path === "index" || p.path === "/"
);
const firstHtmlPage = pages.find((p) => p.path.endsWith(".html"));
setPreviewPage(indexPage?.path || firstHtmlPage?.path || "index.html");
}
}, [pages, previewPage]);
const previewPageData = useMemo(() => {
const found = pages.find((p) => {
const normalizedPagePath = p.path.replace(/^\.?\//, "");
const normalizedPreviewPage = previewPage.replace(/^\.?\//, "");
return normalizedPagePath === normalizedPreviewPage;
});
return found || currentPageData;
}, [pages, previewPage, currentPageData]);
const injectAssetsIntoHtml = useCallback(
(html: string): string => {
if (!html) return html;
const cssFiles = pages.filter(
(p) => p.path.endsWith(".css") && p.path !== previewPageData?.path
);
const jsFiles = pages.filter(
(p) => p.path.endsWith(".js") && p.path !== previewPageData?.path
);
let modifiedHtml = html;
// Inject all CSS files
if (cssFiles.length > 0) {
const allCssContent = cssFiles
.map(
(file) =>
`<style data-injected-from="${file.path}">\n${file.html}\n</style>`
)
.join("\n");
if (modifiedHtml.includes("</head>")) {
modifiedHtml = modifiedHtml.replace(
"</head>",
`${allCssContent}\n</head>`
);
} else if (modifiedHtml.includes("<head>")) {
modifiedHtml = modifiedHtml.replace(
"<head>",
`<head>\n${allCssContent}`
);
} else {
modifiedHtml = allCssContent + "\n" + modifiedHtml;
}
cssFiles.forEach((file) => {
const escapedPath = file.path.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
modifiedHtml = modifiedHtml.replace(
new RegExp(
`<link\\s+[^>]*href=["'][\\.\/]*${escapedPath}["'][^>]*>`,
"gi"
),
""
);
});
}
if (jsFiles.length > 0) {
const allJsContent = jsFiles
.map(
(file) =>
`<script data-injected-from="${file.path}">\n${file.html}\n</script>`
)
.join("\n");
if (modifiedHtml.includes("</body>")) {
modifiedHtml = modifiedHtml.replace(
"</body>",
`${allJsContent}\n</body>`
);
} else if (modifiedHtml.includes("<body>")) {
modifiedHtml = modifiedHtml + allJsContent;
} else {
modifiedHtml = modifiedHtml + "\n" + allJsContent;
}
jsFiles.forEach((file) => {
const escapedPath = file.path.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
modifiedHtml = modifiedHtml.replace(
new RegExp(
`<script\\s+[^>]*src=["'][\\.\/]*${escapedPath}["'][^>]*><\\/script>`,
"gi"
),
""
);
});
}
return modifiedHtml;
},
[pages, previewPageData?.path]
);
useEffect(() => {
if (isNew && previewPageData?.html) {
const now = Date.now();
const timeSinceLastUpdate = now - lastUpdateTimeRef.current;
if (lastUpdateTimeRef.current === 0 || timeSinceLastUpdate >= 3000) {
const processedHtml = injectAssetsIntoHtml(previewPageData.html);
setThrottledHtml(processedHtml);
lastUpdateTimeRef.current = now;
} else {
const timeUntilNextUpdate = 3000 - timeSinceLastUpdate;
const timer = setTimeout(() => {
const processedHtml = injectAssetsIntoHtml(previewPageData.html);
setThrottledHtml(processedHtml);
lastUpdateTimeRef.current = Date.now();
}, timeUntilNextUpdate);
return () => clearTimeout(timer);
}
}
}, [isNew, previewPageData?.html, injectAssetsIntoHtml]);
useEffect(() => {
if (!isAiWorking && !globalAiLoading && previewPageData?.html) {
const processedHtml = injectAssetsIntoHtml(previewPageData.html);
setStableHtml(processedHtml);
}
}, [
isAiWorking,
globalAiLoading,
previewPageData?.html,
injectAssetsIntoHtml,
previewPage,
]);
useEffect(() => {
if (
previewPageData?.html &&
!stableHtml &&
!isAiWorking &&
!globalAiLoading
) {
const processedHtml = injectAssetsIntoHtml(previewPageData.html);
setStableHtml(processedHtml);
}
}, [
previewPageData?.html,
stableHtml,
isAiWorking,
globalAiLoading,
injectAssetsIntoHtml,
]);
const setupIframeListeners = () => {
if (iframeRef?.current?.contentDocument) {
const iframeDocument = iframeRef.current.contentDocument;
iframeDocument.addEventListener(
"click",
handleCustomNavigation as any,
true
);
if (isEditableModeEnabled) {
iframeDocument.addEventListener("mouseover", handleMouseOver);
iframeDocument.addEventListener("mouseout", handleMouseOut);
iframeDocument.addEventListener("click", handleClick);
}
}
};
useEffect(() => {
const cleanupListeners = () => {
if (iframeRef?.current?.contentDocument) {
const iframeDocument = iframeRef.current.contentDocument;
iframeDocument.removeEventListener(
"click",
handleCustomNavigation as any,
true
);
iframeDocument.removeEventListener("mouseover", handleMouseOver);
iframeDocument.removeEventListener("mouseout", handleMouseOut);
iframeDocument.removeEventListener("click", handleClick);
}
};
const timer = setTimeout(() => {
if (iframeRef?.current?.contentDocument) {
cleanupListeners();
setupIframeListeners();
}
}, 50);
return () => {
clearTimeout(timer);
cleanupListeners();
};
}, [isEditableModeEnabled, stableHtml, throttledHtml, previewPage]);
const promoteVersion = async () => {
setIsPromotingVersion(true);
await api
.post(
`/me/projects/${project?.space_id}/commits/${currentCommit}/promote`
)
.then((res) => {
if (res.data.ok) {
setCurrentCommit(null);
setPages(res.data.pages);
setCurrentPage(res.data.pages[0].path);
setPreviewPage(res.data.pages[0].path);
toast.success("Version promoted successfully");
}
})
.catch((err) => {
toast.error(err.response.data.error);
});
setIsPromotingVersion(false);
};
const handleMouseOver = (event: MouseEvent) => {
if (iframeRef?.current) {
const iframeDocument = iframeRef.current.contentDocument;
if (iframeDocument) {
const targetElement = event.target as HTMLElement;
if (
hoveredElement?.tagName !== targetElement.tagName ||
hoveredElement?.rect.top !==
targetElement.getBoundingClientRect().top ||
hoveredElement?.rect.left !==
targetElement.getBoundingClientRect().left ||
hoveredElement?.rect.width !==
targetElement.getBoundingClientRect().width ||
hoveredElement?.rect.height !==
targetElement.getBoundingClientRect().height
) {
if (targetElement !== iframeDocument.body) {
const rect = targetElement.getBoundingClientRect();
setHoveredElement({
tagName: targetElement.tagName,
rect: {
top: rect.top,
left: rect.left,
width: rect.width,
height: rect.height,
},
});
targetElement.classList.add("hovered-element");
} else {
return setHoveredElement(null);
}
}
}
}
};
const handleMouseOut = () => {
setHoveredElement(null);
};
const handleClick = (event: MouseEvent) => {
if (iframeRef?.current) {
const iframeDocument = iframeRef.current.contentDocument;
if (iframeDocument) {
const path = event.composedPath();
const targetElement = path[0] as HTMLElement;
const findClosestAnchor = (
element: HTMLElement
): HTMLAnchorElement | null => {
let current: HTMLElement | null = element;
while (current) {
if (current.tagName?.toUpperCase() === "A") {
return current as HTMLAnchorElement;
}
if (current === iframeDocument.body) {
break;
}
const parent: Node | null = current.parentNode;
if (parent && parent.nodeType === 11) {
current = (parent as ShadowRoot).host as HTMLElement;
} else if (parent && parent.nodeType === 1) {
current = parent as HTMLElement;
} else {
break;
}
}
return null;
};
const anchorElement = findClosestAnchor(targetElement);
if (anchorElement) {
return;
}
if (targetElement !== iframeDocument.body) {
setSelectedElement(targetElement);
}
}
}
};
const handleCustomNavigation = (event: MouseEvent) => {
if (iframeRef?.current) {
const iframeDocument = iframeRef.current.contentDocument;
if (iframeDocument) {
const path = event.composedPath();
const actualTarget = path[0] as HTMLElement;
const findClosestAnchor = (
element: HTMLElement
): HTMLAnchorElement | null => {
let current: HTMLElement | null = element;
while (current) {
if (current.tagName?.toUpperCase() === "A") {
return current as HTMLAnchorElement;
}
if (current === iframeDocument.body) {
break;
}
const parent: Node | null = current.parentNode;
if (parent && parent.nodeType === 11) {
current = (parent as ShadowRoot).host as HTMLElement;
} else if (parent && parent.nodeType === 1) {
current = parent as HTMLElement;
} else {
break;
}
}
return null;
};
const anchorElement = findClosestAnchor(actualTarget);
if (anchorElement) {
let href = anchorElement.getAttribute("href");
if (href) {
event.stopPropagation();
event.preventDefault();
if (href.startsWith("#")) {
let targetElement = iframeDocument.querySelector(href);
if (!targetElement) {
const searchInShadows = (
root: Document | ShadowRoot
): Element | null => {
const elements = root.querySelectorAll("*");
for (const el of elements) {
if (el.shadowRoot) {
const found = el.shadowRoot.querySelector(href);
if (found) return found;
const nested = searchInShadows(el.shadowRoot);
if (nested) return nested;
}
}
return null;
};
targetElement = searchInShadows(iframeDocument);
}
if (targetElement) {
targetElement.scrollIntoView({ behavior: "smooth" });
}
return;
}
let normalizedHref = href.replace(/^\.?\//, "");
if (normalizedHref === "" || normalizedHref === "/") {
normalizedHref = "index.html";
}
const hashIndex = normalizedHref.indexOf("#");
if (hashIndex !== -1) {
normalizedHref = normalizedHref.substring(0, hashIndex);
}
if (!normalizedHref.includes(".")) {
normalizedHref = normalizedHref + ".html";
}
const isPageExist = pages.some((page) => {
const pagePath = page.path.replace(/^\.?\//, "");
return pagePath === normalizedHref;
});
if (isPageExist) {
setPreviewPage(normalizedHref);
}
}
}
}
}
};
return (
<div
className={classNames(
"bg-neutral-900/30 w-full h-[calc(100dvh-57px)] flex flex-col items-center justify-center relative z-1 lg:border-l border-neutral-800",
{
"max-lg:h-0 overflow-hidden": currentTab === "chat",
"max-lg:h-full": currentTab === "preview",
}
)}
>
<GridPattern
x={-1}
y={-1}
strokeDasharray={"4 2"}
className={cn(
"[mask-image:radial-gradient(900px_circle_at_center,white,transparent)] opacity-40"
)}
/>
{/* Preview page indicator */}
{!isAiWorking && hoveredElement && isEditableModeEnabled && (
<div
className="cursor-pointer absolute bg-sky-500/10 border-[2px] border-dashed border-sky-500 rounded-r-lg rounded-b-lg p-3 z-10 pointer-events-none"
style={{
top: hoveredElement.rect.top,
left: hoveredElement.rect.left,
width: hoveredElement.rect.width,
height: hoveredElement.rect.height,
}}
>
<span className="bg-sky-500 rounded-t-md text-sm text-neutral-100 px-2 py-0.5 -translate-y-7 absolute top-0 left-0">
{htmlTagToText(hoveredElement.tagName.toLowerCase())}
</span>
</div>
)}
{isLoadingProject ? (
<div className="w-full h-full flex items-center justify-center relative">
<div className="py-10 w-full relative z-1 max-w-3xl mx-auto text-center">
<AiLoading text="Fetching your project..." className="flex-col" />
<AnimatedBlobs />
<AnimatedBlobs />
</div>
</div>
) : (
<>
<iframe
id="preview-iframe"
ref={iframeRef}
className={classNames(
"w-full select-none transition-all duration-200 bg-black h-full",
{
"lg:max-w-md lg:mx-auto lg:!rounded-[42px] lg:border-[8px] lg:border-neutral-700 lg:shadow-2xl lg:h-[80dvh] lg:max-h-[996px]":
device === "mobile",
}
)}
src={
currentCommit
? `https://${project?.space_id?.replaceAll(
"/",
"-"
)}--rev-${currentCommit.slice(0, 7)}.static.hf.space`
: undefined
}
srcDoc={
!currentCommit
? isNew
? throttledHtml || defaultHTML
: stableHtml
: undefined
}
onLoad={
!currentCommit
? () => {
if (iframeRef?.current?.contentWindow?.document?.body) {
iframeRef.current.contentWindow.document.body.scrollIntoView(
{
block: isAiWorking ? "end" : "start",
inline: "nearest",
behavior: isAiWorking ? "instant" : "smooth",
}
);
}
setupIframeListeners();
}
: undefined
}
sandbox="allow-scripts allow-same-origin allow-popups allow-popups-to-escape-sandbox allow-modals allow-forms"
allow="accelerometer; ambient-light-sensor; autoplay; battery; camera; clipboard-read; clipboard-write; display-capture; document-domain; encrypted-media; fullscreen; geolocation; gyroscope; layout-animations; legacy-image-formats; magnetometer; microphone; midi; oversized-images; payment; picture-in-picture; publickey-credentials-get; serial; sync-xhr; usb; vr ; wake-lock; xr-spatial-tracking"
/>
{!isNew && (
<>
<div
className={classNames(
"w-full h-full flex items-center justify-center absolute left-0 top-0 bg-black/40 backdrop-blur-lg transition-all duration-200",
{
"opacity-0 pointer-events-none": !globalAiLoading,
}
)}
>
<div className="py-10 w-full relative z-1 max-w-3xl mx-auto text-center">
<AiLoading
text={
isLoadingProject ? "Fetching your project..." : undefined
}
className="flex-col"
/>
<AnimatedBlobs />
<AnimatedBlobs />
</div>
</div>
<HistoryNotification
isVisible={!!currentCommit}
isPromotingVersion={isPromotingVersion}
onPromoteVersion={promoteVersion}
onGoBackToCurrent={() => setCurrentCommit(null)}
/>
</>
)}
</>
)}
</div>
);
};
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