open-webui / src /lib /components /chat /FileNav /FilePreview.svelte
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<script lang="ts">
import { getContext, tick } from 'svelte';
import { marked } from 'marked';
import DOMPurify from 'dompurify';
import { settings } from '$lib/stores';
import { isCodeFile } from '$lib/utils/codeHighlight';
import { initMermaid, renderMermaidDiagram } from '$lib/utils';
import Spinner from '../../common/Spinner.svelte';
import PDFViewer from '../../common/PDFViewer.svelte';
import PanzoomContainer from '../../common/PanzoomContainer.svelte';
import JsonTreeView from './JsonTreeView.svelte';
import NotebookView from './NotebookView.svelte';
import SqliteView from './SqliteView.svelte';
import FileCodeEditor from './FileCodeEditor.svelte';
let pdfViewerRef: PDFViewer;
let fileCodeEditorRef: FileCodeEditor;
const i18n = getContext('i18n');
export let selectedFile: string | null = null;
export let fileLoading = false;
export let fileImageUrl: string | null = null;
export let fileVideoUrl: string | null = null;
export let fileAudioUrl: string | null = null;
export let filePdfData: ArrayBuffer | null = null;
export let fileSqliteData: ArrayBuffer | null = null;
export let fileContent: string | null = null;
// Terminal connection for notebook execution
export let baseUrl: string = '';
export let apiKey: string = '';
// Office preview props
export let fileOfficeHtml: string | null = null;
export let fileOfficeSlides: string[] | null = null;
export let currentSlide = 0;
export let excelSheetNames: string[] = [];
export let selectedExcelSheet = '';
export let onSheetChange: ((sheet: string) => void) | null = null;
export let overlay = false;
export let onSave: ((content: string) => Promise<void>) | null = null;
export let editing = false;
let editContent = '';
export let saving = false;
let editTextarea: HTMLTextAreaElement;
// Reset edit state when switching files
$: (selectedFile, resetEdit());
const resetEdit = () => {
editing = false;
editContent = '';
saving = false;
};
export const startEdit = async () => {
editContent = fileContent ?? '';
editing = true;
showRaw = true;
await tick();
editTextarea?.focus();
};
export const saveEdit = async () => {
if (!onSave) return;
saving = true;
await onSave(editContent);
saving = false;
editing = false;
};
export const cancelEdit = () => {
editing = false;
editContent = '';
};
/** Save code file directly from CodeMirror */
export const saveCodeFile = async () => {
if (!onSave) return;
saving = true;
const content = fileCodeEditorRef?.getValue() ?? '';
await onSave(content);
saving = false;
};
$: isTextFile = fileContent !== null && fileImageUrl === null && filePdfData === null;
const MD_EXTS = new Set(['md', 'markdown', 'mdx']);
const CSV_EXTS = new Set(['csv', 'tsv']);
const HTML_EXTS = new Set(['html', 'htm']);
const JSON_EXTS = new Set(['json', 'jsonc', 'jsonl', 'json5']);
const getExt = (path: string | null) => path?.split('.').pop()?.toLowerCase() ?? '';
$: isMarkdown = MD_EXTS.has(getExt(selectedFile));
$: isCsv = CSV_EXTS.has(getExt(selectedFile));
$: isHtml = HTML_EXTS.has(getExt(selectedFile));
$: isJson = JSON_EXTS.has(getExt(selectedFile));
$: isSvg = getExt(selectedFile) === 'svg';
$: isNotebook = getExt(selectedFile) === 'ipynb';
$: isCode = isCodeFile(selectedFile);
$: csvDelimiter = getExt(selectedFile) === 'tsv' ? '\t' : ',';
// For HTML files on system terminals (proxy URL), use path-based serving
// so the iframe can resolve relative CSS/JS/image references via cookie auth.
$: serveUrl =
isHtml && selectedFile && baseUrl && baseUrl.includes('/api/v1/terminals/')
? `${baseUrl}/files/serve/${selectedFile.replace(/^\//, '')}`
: null;
$: renderedHtml =
isMarkdown && fileContent
? DOMPurify.sanitize(marked.parse(fileContent, { async: false }) as string)
: '';
let markdownEl: HTMLDivElement;
let mermaidInstance: any = null;
const renderMermaidBlocks = async (el: HTMLDivElement) => {
if (!el) return;
const codeEls = el.querySelectorAll('code.language-mermaid');
if (codeEls.length === 0) return;
if (!mermaidInstance) {
mermaidInstance = await initMermaid();
}
for (const codeEl of codeEls) {
const pre = codeEl.parentElement;
if (!pre || pre.tagName !== 'PRE' || pre.dataset.mermaidRendered) continue;
pre.dataset.mermaidRendered = 'true';
try {
const svg = await renderMermaidDiagram(mermaidInstance, codeEl.textContent ?? '');
if (svg) {
const wrapper = document.createElement('div');
wrapper.className = 'mermaid-diagram flex justify-center py-2';
wrapper.innerHTML = svg;
pre.replaceWith(wrapper);
}
} catch (e) {
console.error('Mermaid render error:', e);
}
}
};
$: if (renderedHtml && markdownEl) {
tick().then(() => renderMermaidBlocks(markdownEl));
}
// Simple CSV parser that handles quoted fields
const parseCsv = (text: string, delimiter: string): string[][] => {
const rows: string[][] = [];
let row: string[] = [];
let field = '';
let inQuotes = false;
for (let i = 0; i < text.length; i++) {
const ch = text[i];
if (inQuotes) {
if (ch === '"') {
if (text[i + 1] === '"') {
field += '"';
i++;
} else {
inQuotes = false;
}
} else {
field += ch;
}
} else if (ch === '"') {
inQuotes = true;
} else if (ch === delimiter) {
row.push(field);
field = '';
} else if (ch === '\n' || (ch === '\r' && text[i + 1] === '\n')) {
if (ch === '\r') i++;
row.push(field);
field = '';
if (row.some((c) => c !== '')) rows.push(row);
row = [];
} else {
field += ch;
}
}
row.push(field);
if (row.some((c) => c !== '')) rows.push(row);
return rows;
};
$: csvRows = isCsv && fileContent ? parseCsv(fileContent, csvDelimiter) : [];
$: csvHeader = csvRows.length > 0 ? csvRows[0] : [];
$: csvBody = csvRows.length > 1 ? csvRows.slice(1) : [];
// ── Shiki code highlighting (SVG only) ──────────────────────────────
let highlightedHtml: string | null = null;
let highlightingFile: string | null = null;
$: if (isSvg && fileContent !== null && selectedFile) {
const currentFile = selectedFile;
highlightingFile = currentFile;
import('shiki')
.then(({ codeToHtml }) =>
codeToHtml(fileContent!, {
lang: 'xml',
themes: { light: 'github-light', dark: 'github-dark' },
defaultColor: 'light'
})
)
.then((html) => {
if (highlightingFile === currentFile) highlightedHtml = html;
})
.catch(() => {
if (highlightingFile === currentFile) highlightedHtml = null;
});
} else {
highlightedHtml = null;
}
// ── JSON parsing ────────────────────────────────────────────────────
let parsedJson: unknown = undefined;
let jsonError: string | null = null;
$: if (isJson && fileContent !== null) {
try {
parsedJson = JSON.parse(fileContent);
jsonError = null;
} catch (e) {
parsedJson = undefined;
jsonError = e instanceof Error ? e.message : 'Invalid JSON';
}
} else {
parsedJson = undefined;
jsonError = null;
}
// ── Notebook parsing ─────────────────────────────────────────────────
let parsedNotebook: Record<string, unknown> | null = null;
$: if (isNotebook && fileContent !== null) {
try {
parsedNotebook = JSON.parse(fileContent);
} catch {
parsedNotebook = null;
}
} else {
parsedNotebook = null;
}
export let showRaw = false;
$: (selectedFile, (showRaw = false)); // reset to preview mode when switching files
// Auto-switch to raw/editor mode for empty previewable files so the user
// can start editing immediately instead of seeing a blank preview.
$: if (fileContent !== null && fileContent.trim() === '' && (isMarkdown || isCsv || isJson)) {
showRaw = true;
}
let panzoomRef: PanzoomContainer;
export const resetImageView = () => {
panzoomRef?.reset();
};
export const resetPdfView = () => {
pdfViewerRef?.resetView();
};
</script>
<div
class="flex-1 {fileImageUrl !== null || (fileOfficeSlides !== null && fileOfficeSlides.length > 0)
? 'overflow-hidden'
: 'overflow-y-auto'} min-h-0 min-w-0 relative h-full"
>
<!-- File preview -->
{#if fileLoading}
<div class="flex items-center justify-center h-full"><Spinner className="size-4" /></div>
{:else if fileImageUrl !== null}
<PanzoomContainer
bind:this={panzoomRef}
className="w-full h-full flex items-center justify-center"
options={{ zoomDoubleClickSpeed: 1 }}
>
<img
src={fileImageUrl}
alt={selectedFile?.split('/').pop()}
class="max-w-full max-h-full object-contain p-3"
draggable="false"
/>
</PanzoomContainer>
{:else if fileVideoUrl !== null}
<div class="w-full h-full flex items-center justify-center bg-black">
<!-- svelte-ignore a11y-media-has-caption -->
<video src={fileVideoUrl} controls class="max-w-full max-h-full">
{$i18n.t('Your browser does not support the video tag.')}
</video>
</div>
{:else if fileAudioUrl !== null}
<div class="w-full h-full flex items-center justify-center p-6">
<audio src={fileAudioUrl} controls class="w-full max-w-md">
{$i18n.t('Your browser does not support the audio tag.')}
</audio>
</div>
{:else if filePdfData !== null}
<PDFViewer bind:this={pdfViewerRef} data={filePdfData} className="w-full h-full" />
{:else if fileSqliteData !== null}
<SqliteView data={fileSqliteData} />
{:else if fileOfficeHtml !== null}
<div class="flex flex-col h-full">
<div class="office-preview overflow-auto flex-1 min-h-0">
{@html fileOfficeHtml}
</div>
{#if excelSheetNames.length > 1}
<div
class="flex items-center gap-1 py-1.5 px-3 border-t border-gray-100 dark:border-gray-800 overflow-x-auto"
>
{#each excelSheetNames as sheet}
<button
class="shrink-0 px-3 py-1 text-xs rounded-md transition-colors
{selectedExcelSheet === sheet
? 'bg-gray-200 dark:bg-gray-700 text-gray-800 dark:text-gray-200 font-medium'
: 'text-gray-500 dark:text-gray-400 hover:bg-gray-100 dark:hover:bg-gray-800'}"
on:click={() => onSheetChange?.(sheet)}
>
{sheet}
</button>
{/each}
</div>
{/if}
</div>
{:else if fileOfficeSlides !== null && fileOfficeSlides.length > 0}
<div class="flex flex-col h-full">
<PanzoomContainer
bind:this={panzoomRef}
className="w-full flex-1 min-h-0 flex items-center justify-center overflow-hidden"
options={{ zoomDoubleClickSpeed: 1 }}
>
<img
src={fileOfficeSlides[currentSlide]}
alt="Slide {currentSlide + 1}"
class="max-w-full max-h-full object-contain p-3"
draggable="false"
/>
</PanzoomContainer>
{#if fileOfficeSlides.length > 1}
<div
class="flex items-center justify-center gap-3 py-2 px-3 border-t border-gray-100 dark:border-gray-800 text-xs text-gray-500"
>
<button
class="p-1 rounded hover:bg-gray-100 dark:hover:bg-gray-800 disabled:opacity-30"
disabled={currentSlide === 0}
on:click={() => {
resetImageView();
currentSlide = Math.max(0, currentSlide - 1);
}}
>
<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 20 20"
fill="currentColor"
class="size-4"
>
<path
fill-rule="evenodd"
d="M11.78 5.22a.75.75 0 0 1 0 1.06L8.06 10l3.72 3.72a.75.75 0 1 1-1.06 1.06l-4.25-4.25a.75.75 0 0 1 0-1.06l4.25-4.25a.75.75 0 0 1 1.06 0Z"
clip-rule="evenodd"
/>
</svg>
</button>
<span>{currentSlide + 1} / {fileOfficeSlides.length}</span>
<button
class="p-1 rounded hover:bg-gray-100 dark:hover:bg-gray-800 disabled:opacity-30"
disabled={currentSlide === fileOfficeSlides.length - 1}
on:click={() => {
resetImageView();
currentSlide = Math.min(fileOfficeSlides.length - 1, currentSlide + 1);
}}
>
<svg
xmlns="http://www.w3.org/2000/svg"
viewBox="0 0 20 20"
fill="currentColor"
class="size-4"
>
<path
fill-rule="evenodd"
d="M8.22 5.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.75.75 0 0 1-1.06-1.06L11.94 10 8.22 6.28a.75.75 0 0 1 0-1.06Z"
clip-rule="evenodd"
/>
</svg>
</button>
</div>
{/if}
</div>
{:else if fileContent !== null}
{#if isHtml && !showRaw && serveUrl}
{#if overlay}
<div class="absolute top-0 left-0 right-0 bottom-0 z-10"></div>
{/if}
<iframe
src={serveUrl}
sandbox="allow-scripts allow-same-origin allow-downloads{($settings?.iframeSandboxAllowForms ??
false)
? ' allow-forms'
: ''}"
class="w-full h-full border-none bg-white"
title="HTML Preview"
/>
{:else if isHtml && !showRaw}
{#if overlay}
<div class="absolute top-0 left-0 right-0 bottom-0 z-10"></div>
{/if}
<iframe
srcdoc={fileContent}
sandbox="allow-scripts allow-downloads{($settings?.iframeSandboxAllowForms ?? false)
? ' allow-forms'
: ''}{($settings?.iframeSandboxAllowSameOrigin ?? false) ? ' allow-same-origin' : ''}"
class="w-full h-full border-none bg-white"
title="HTML Preview"
/>
{:else if isHtml && showRaw}
<div class="absolute inset-0">
<FileCodeEditor
bind:this={fileCodeEditorRef}
value={fileContent ?? ''}
filePath={selectedFile}
{onSave}
/>
</div>
{:else if isMarkdown && !showRaw}
<div bind:this={markdownEl} class="prose dark:prose-invert max-w-full text-sm p-3">
{@html renderedHtml}
</div>
{:else if isMarkdown && showRaw}
<div class="absolute inset-0">
<FileCodeEditor
bind:this={fileCodeEditorRef}
value={fileContent ?? ''}
filePath={selectedFile}
{onSave}
/>
</div>
{:else if isCsv && !showRaw && csvRows.length > 0}
<div class="absolute inset-0 overflow-auto px-3 pb-3">
<table class="csv-table text-xs font-mono border-collapse">
<thead>
<tr>
<th class="csv-row-num">#</th>
{#each csvHeader as cell}
<th>{cell}</th>
{/each}
</tr>
</thead>
<tbody>
{#each csvBody as row, i}
<tr>
<td class="csv-row-num">{i + 1}</td>
{#each row as cell}
<td>{cell}</td>
{/each}
<!-- Pad missing columns -->
{#each Array(Math.max(0, csvHeader.length - row.length)) as _}
<td></td>
{/each}
</tr>
{/each}
</tbody>
</table>
</div>
{:else if isNotebook && !showRaw && parsedNotebook}
<div class="overflow-auto h-full">
<NotebookView notebook={parsedNotebook} filePath={selectedFile ?? ''} {baseUrl} {apiKey} />
</div>
{:else if isJson && !showRaw && parsedJson !== undefined}
<div class="overflow-auto h-full">
<JsonTreeView data={parsedJson} />
</div>
{:else if isJson && !showRaw && jsonError}
<div class="p-3 text-xs">
<div class="text-red-500 mb-2">JSON parse error: {jsonError}</div>
<pre
class="text-xs font-mono text-gray-800 dark:text-gray-200 whitespace-pre-wrap break-all leading-relaxed">{fileContent}</pre>
</div>
{:else if isSvg && !showRaw && fileContent}
<div class="svg-preview w-full h-full flex items-center justify-center overflow-auto p-3">
{@html DOMPurify.sanitize(fileContent, {
USE_PROFILES: { svg: true, svgFilters: true },
ADD_TAGS: ['use']
})}
</div>
{:else if isCode && !showRaw}
<div class="absolute inset-0">
<FileCodeEditor
bind:this={fileCodeEditorRef}
value={fileContent ?? ''}
filePath={selectedFile}
{onSave}
/>
</div>
{:else if isSvg && highlightedHtml && !showRaw}
<div class="shiki-preview overflow-auto h-full text-xs">
{@html highlightedHtml}
</div>
{:else if editing}
<textarea
bind:this={editTextarea}
bind:value={editContent}
class="w-full h-full text-xs font-mono text-gray-800 dark:text-gray-200 whitespace-pre break-all leading-relaxed p-3 bg-transparent border-none outline-none resize-none"
spellcheck="false"
/>
{:else}
<pre
class="text-xs font-mono text-gray-800 dark:text-gray-200 whitespace-pre-wrap break-all leading-relaxed p-3">{fileContent}</pre>
{/if}
{:else}
<div class="text-xs text-gray-400 text-center pt-8">
{$i18n.t('Could not read file.')}
</div>
{/if}
</div>
<style>
.csv-table {
font-size: 0.7rem;
line-height: 1.4;
}
.csv-table th,
.csv-table td {
padding: 4px 8px;
text-align: left;
white-space: nowrap;
border: 1px solid rgba(128, 128, 128, 0.15);
}
.csv-table thead th {
position: sticky;
top: 0;
background: rgba(243, 244, 246, 0.95);
backdrop-filter: blur(4px);
font-weight: 600;
color: #374151;
border-bottom: 2px solid rgba(128, 128, 128, 0.25);
z-index: 1;
}
:global(.dark) .csv-table thead th {
background: rgba(31, 41, 55, 0.95);
color: #d1d5db;
}
.csv-table tbody tr:nth-child(even) {
background: rgba(128, 128, 128, 0.04);
}
.csv-table tbody tr:hover {
background: rgba(59, 130, 246, 0.06);
}
:global(.dark) .csv-table tbody tr:hover {
background: rgba(59, 130, 246, 0.1);
}
.csv-table td {
color: #374151;
}
:global(.dark) .csv-table td {
color: #d1d5db;
}
.csv-row-num {
color: #9ca3af;
font-size: 0.6rem;
text-align: right !important;
user-select: none;
width: 1px;
padding-right: 6px !important;
}
:global(.dark) .csv-row-num {
color: #6b7280;
}
/* ── Office preview styles ──────────────────────────────────────── */
:global(.office-preview) {
font-size: 0.875rem;
line-height: 1.6;
color: #1f2937;
background: #fff;
border-radius: 4px;
}
:global(.dark .office-preview) {
color: #e5e7eb;
background: #1a1a2e;
}
:global(.office-preview table) {
border-collapse: collapse;
font-size: 0.75rem;
font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
line-height: 1.3;
}
:global(.office-preview table td),
:global(.office-preview table th) {
border: 1px solid rgba(200, 200, 200, 0.5);
padding: 4px 10px;
text-align: left;
white-space: nowrap;
user-select: text;
cursor: cell;
max-width: 300px;
overflow: hidden;
text-overflow: ellipsis;
}
:global(.dark .office-preview table td),
:global(.dark .office-preview table th) {
border-color: rgba(80, 80, 80, 0.5);
}
/* Column letter headers */
:global(.office-preview table th.excel-col-hdr) {
position: sticky;
top: 0;
z-index: 2;
background: #f0f0f0;
color: #666;
font-weight: 500;
font-size: 0.65rem;
text-align: center;
padding: 3px 10px;
border-bottom: 2px solid rgba(180, 180, 180, 0.6);
}
:global(.dark .office-preview table th.excel-col-hdr) {
background: #2a2a3e;
color: #888;
border-bottom-color: rgba(100, 100, 100, 0.6);
}
/* Row number cells */
:global(.office-preview .excel-row-num) {
position: sticky;
left: 0;
z-index: 1;
background: #f0f0f0;
color: #999;
font-size: 0.6rem;
text-align: right !important;
padding: 4px 8px 4px 4px !important;
user-select: none;
width: 1px;
white-space: nowrap;
border-right: 2px solid rgba(180, 180, 180, 0.6) !important;
}
:global(.dark .office-preview .excel-row-num) {
background: #2a2a3e;
color: #666;
border-right-color: rgba(100, 100, 100, 0.6) !important;
}
/* Corner cell (intersection of row nums and col headers) */
:global(.office-preview thead .excel-row-num) {
z-index: 3;
}
/* Number cells right-aligned */
:global(.office-preview .excel-num) {
text-align: right;
font-variant-numeric: tabular-nums;
}
/* Row hover and selection */
:global(.office-preview table tbody tr:nth-child(even) td:not(.excel-row-num)) {
background: rgba(0, 0, 0, 0.015);
}
:global(.dark .office-preview table tbody tr:nth-child(even) td:not(.excel-row-num)) {
background: rgba(255, 255, 255, 0.02);
}
:global(.office-preview table tbody tr:hover td:not(.excel-row-num)) {
background: rgba(59, 130, 246, 0.06);
}
:global(.dark .office-preview table tbody tr:hover td:not(.excel-row-num)) {
background: rgba(59, 130, 246, 0.1);
}
:global(.office-preview table td:focus) {
outline: 2px solid rgba(59, 130, 246, 0.5);
outline-offset: -2px;
}
/* DOCX / generic office styles */
:global(.office-preview img) {
max-width: 100%;
height: auto;
}
:global(.office-preview h1) {
font-size: 1.5rem;
font-weight: 700;
margin: 0.75em 0 0.5em;
}
:global(.office-preview h2) {
font-size: 1.25rem;
font-weight: 600;
margin: 0.75em 0 0.5em;
}
:global(.office-preview h3) {
font-size: 1.1rem;
font-weight: 600;
margin: 0.5em 0 0.25em;
}
:global(.office-preview p) {
margin: 0.25em 0;
}
:global(.office-preview ul),
:global(.office-preview ol) {
padding-left: 1.5em;
margin: 0.5em 0;
}
/* ── Shiki code highlighting ─────────────────────────────────── */
.shiki-preview :global(pre.shiki) {
margin: 0;
padding: 0.75rem 1rem;
font-size: 0.75rem;
line-height: 1.6;
border-radius: 0;
overflow-x: auto;
min-height: 100%;
}
.shiki-preview :global(pre.shiki code) {
counter-reset: line;
}
.shiki-preview :global(pre.shiki code > .line) {
counter-increment: line;
display: inline-block;
width: 100%;
white-space: pre;
}
.shiki-preview :global(pre.shiki code > .line::before) {
content: counter(line);
display: inline-block;
width: 2.5em;
text-align: right;
margin-right: 1em;
color: #9ca3af;
user-select: none;
font-size: 0.65rem;
}
:global(.dark) .shiki-preview :global(pre.shiki code > .line::before) {
color: #4b5563;
}
/* Shiki dual-theme: swap CSS variables in dark mode */
:global(.dark) .shiki-preview :global(.shiki),
:global(.dark) .shiki-preview :global(.shiki span) {
color: var(--shiki-dark) !important;
background-color: var(--shiki-dark-bg) !important;
font-style: var(--shiki-dark-font-style) !important;
font-weight: var(--shiki-dark-font-weight) !important;
text-decoration: var(--shiki-dark-text-decoration) !important;
}
</style>