Files
multica/packages/views/editor/html-block-preview.tsx
Jiayuan Zhang 044f7f0cc6 feat(editor): bump HTML iframe preview default height to 480px (MUL-2419) (#2842)
320px was too cramped for typical rendered HTML (charts, dashboards,
formatted documents). Matches the existing HTML attachment preview
height for visual consistency across both iframe surfaces.

Co-authored-by: Lambda <lambda@multica.ai>
Co-authored-by: multica-agent <github@multica.ai>
2026-05-19 19:15:03 +02:00

109 lines
3.7 KiB
TypeScript

"use client";
/**
* HtmlBlockPreview — readonly rendering of fenced ```html code blocks.
*
* Default view is "preview" (iframe) per the V2 plan; user can flip to
* "source" to see the highlighted markup and Copy it.
*
* Mounted by ReadonlyContent's `code` renderer for `lang === "html"`. The
* `pre` renderer in ReadonlyContent recognizes this component by reference
* and unwraps it from the default `<pre>` envelope, matching the same
* two-layer trick already used for MermaidDiagram.
*
* NOT used in the editable Tiptap NodeView — that path must keep
* `<NodeViewContent as="code" />` so the user can continue typing.
*/
import { useState } from "react";
import { Check, Code as CodeIcon, Copy, Eye } from "lucide-react";
import { cn } from "@multica/ui/lib/utils";
import { useT } from "../i18n";
import { CodeBlockIframe } from "./code-block-iframe";
import { CodeBlockStatic } from "./code-block-static";
const CODE_BLOCK_IFRAME_HEIGHT = "h-[480px]";
// Label shown in the code-block header. Not a translatable string — it's a
// language identifier (matches the `lang === "html"` token below).
const HTML_LANGUAGE_LABEL = "html";
interface HtmlBlockPreviewProps {
html: string;
className?: string;
}
export function HtmlBlockPreview({ html, className }: HtmlBlockPreviewProps) {
const { t } = useT("editor");
const [view, setView] = useState<"preview" | "source">("preview");
const [copied, setCopied] = useState(false);
const handleCopy = async () => {
if (!html) return;
try {
await navigator.clipboard.writeText(html);
setCopied(true);
setTimeout(() => setCopied(false), 2000);
} catch {
// Clipboard failures are user-recoverable (click again, or copy
// manually from the source view) — no need for a toast here.
}
};
const toggleView = () =>
setView((v) => (v === "preview" ? "source" : "preview"));
return (
<div className={cn("code-block-wrapper group/code relative my-2", className)}>
<div
className="absolute top-0 right-0 z-10 flex items-center gap-1.5 px-2 py-1.5 opacity-0 transition-opacity group-hover/code:opacity-100"
>
<span className="text-xs text-muted-foreground select-none">{HTML_LANGUAGE_LABEL}</span>
<button
type="button"
onClick={toggleView}
className="flex h-6 w-6 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
title={
view === "preview"
? t(($) => $.code_block.show_source)
: t(($) => $.code_block.show_preview)
}
aria-label={
view === "preview"
? t(($) => $.code_block.show_source)
: t(($) => $.code_block.show_preview)
}
>
{view === "preview" ? (
<CodeIcon className="h-3.5 w-3.5" />
) : (
<Eye className="h-3.5 w-3.5" />
)}
</button>
<button
type="button"
onClick={handleCopy}
className="flex h-6 w-6 items-center justify-center rounded text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
title={t(($) => $.code_block.copy_code)}
aria-label={t(($) => $.code_block.copy_code)}
>
{copied ? (
<Check className="h-3.5 w-3.5" />
) : (
<Copy className="h-3.5 w-3.5" />
)}
</button>
</div>
{view === "preview" ? (
<CodeBlockIframe
html={html}
title="HTML preview"
heightClassName={CODE_BLOCK_IFRAME_HEIGHT}
/>
) : (
<CodeBlockStatic language="xml" body={html} />
)}
</div>
);
}