feat(file-viewer): syntax highlighting for code files and chat code blocks
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Vendor highlight.js (core + python, javascript, typescript, json, yaml, bash) and highlight the file viewer's text kind (computed once per load) plus fenced blocks in renderMarkdown. Colors come from new --syn-* CSS variables aliased to the existing palette, so dark mode follows.
This commit is contained in:
Daniele
@@ -2,6 +2,7 @@ import { html, nothing } from 'lit';
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import { unsafeHTML } from 'lit/directives/unsafe-html.js';
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import { keyed } from 'lit/directives/keyed.js';
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import { LightElement, renderMarkdown } from '../../lib/base.js';
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import { codeLangForExt, highlightCode } from '../../lib/highlight.js';
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import { fileWatcher } from '../../lib/file-watcher.js';
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import { t } from '../../lib/i18n.js';
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import './pdf-view.js'; // registers <pdf-view>; pdf.js itself is imported lazily
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@@ -137,6 +138,7 @@ export class FileViewerBase extends LightElement {
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_path: { state: true },
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_kind: { state: true },
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_content: { state: true },
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_codeHtml: { state: true }, // highlighted HTML for code files (null = plain text)
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_blobUrl: { state: true },
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_loading: { state: true },
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_error: { state: true },
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@@ -163,6 +165,7 @@ export class FileViewerBase extends LightElement {
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this._path = null;
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this._kind = null;
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this._content = '';
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this._codeHtml = null;
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this._blobUrl = null;
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this._loading = false;
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this._error = null;
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@@ -261,6 +264,7 @@ export class FileViewerBase extends LightElement {
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this._path = null;
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this._kind = null;
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this._content = '';
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this._codeHtml = null;
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this._error = null;
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this._compileError = null;
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this._htmlMode = 'preview';
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@@ -283,6 +287,7 @@ export class FileViewerBase extends LightElement {
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this._path = path;
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this._kind = kindFor(path);
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this._content = '';
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this._codeHtml = null;
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this._error = null;
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this._compileError = null;
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// Fresh load: drop any editor state from the previous file.
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@@ -315,6 +320,13 @@ export class FileViewerBase extends LightElement {
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const res = await fetch(url);
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if (!res.ok) throw new Error(`HTTP ${res.status}`);
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this._content = await res.text();
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// Syntax highlighting is computed once per load (not per render) and is
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// best-effort: a highlight failure must never lose the file's content.
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this._codeHtml = null;
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if (this._kind === 'text') {
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try { this._codeHtml = highlightCode(this._content, codeLangForExt(extOf(path))); }
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catch { this._codeHtml = null; }
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}
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// Optimistic-locking version token + write flag (editable surface).
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this._etag = res.headers.get('ETag');
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this._canWrite = res.headers.get('X-Writable') === '1';
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@@ -788,6 +800,9 @@ export class FileViewerBase extends LightElement {
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<pre class="fv-code"><code>${this._content}</code></pre>
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`;
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}
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if (this._codeHtml != null) {
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return html`<pre class="fv-code"><code class="hljs">${unsafeHTML(this._codeHtml)}</code></pre>`;
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}
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return html`<pre class="fv-code"><code>${this._content}</code></pre>`;
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}
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}
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@@ -0,0 +1,73 @@
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/* ── Syntax highlighting (highlight.js) ─────────────────────────────────────
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Token colors for code rendered through web/lib/highlight.js: the file
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viewer's code kind and fenced blocks in chat markdown. All colors come from
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the --syn-* variables (variables.css), which track the light/dark palette.
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No background here: the container (.fv-code, chat <pre>) already owns it. */
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.hljs {
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color: inherit;
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background: transparent;
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}
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.hljs-comment,
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.hljs-quote {
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color: var(--syn-comment);
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font-style: italic;
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}
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.hljs-keyword,
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.hljs-literal,
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.hljs-selector-tag {
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color: var(--syn-keyword);
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}
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.hljs-string,
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.hljs-regexp,
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.hljs-template-string,
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.hljs-addition {
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color: var(--syn-string);
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}
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.hljs-number,
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.hljs-symbol,
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.hljs-bullet {
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color: var(--syn-number);
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}
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.hljs-title,
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.hljs-section {
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color: var(--syn-title);
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}
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.hljs-built_in,
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.hljs-type,
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.hljs-title.class_ {
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color: var(--syn-builtin);
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}
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.hljs-attr,
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.hljs-attribute,
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.hljs-variable,
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.hljs-template-variable,
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.hljs-name {
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color: var(--syn-attr);
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}
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.hljs-meta,
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.hljs-meta .hljs-keyword,
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.hljs-selector-class,
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.hljs-selector-id {
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color: var(--syn-meta);
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}
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/* Punctuation, operators and params stay on the base text color. */
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.hljs-subst,
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.hljs-params,
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.hljs-punctuation,
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.hljs-operator {
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color: inherit;
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}
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.hljs-emphasis { font-style: italic; }
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.hljs-strong { font-weight: bold; }
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.hljs-link { text-decoration: underline; }
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@@ -32,6 +32,17 @@
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--radius-md: 12px;
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--radius-lg: 16px;
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/* Syntax highlighting (consumed by hljs-theme.css). Aliases of the palette
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above, so the dark block needs no copies — var() resolves at use time. */
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--syn-comment: var(--tool-shell);
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--syn-keyword: var(--accent-hover);
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--syn-string: var(--tool-outline);
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--syn-number: var(--tool-config);
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--syn-title: var(--tool-edit);
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--syn-builtin: var(--tool-list);
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--syn-attr: var(--tool-read);
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--syn-meta: var(--tool-search);
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/* Sidebar — warm cream */
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--sidebar-bg: #f6f0e6;
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--sidebar-hover: rgba(63, 52, 40, 0.06);
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@@ -70,6 +70,7 @@
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<link rel="stylesheet" href="css/projects/base.css" />
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<link rel="stylesheet" href="css/projects/board.css" />
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<link rel="stylesheet" href="css/file-viewer.css" />
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<link rel="stylesheet" href="css/hljs-theme.css" />
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<!-- pdf.js TextLayer's DOM contract (selectable text over the rendered pages). -->
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<link rel="stylesheet" href="/vendor/pdf-text-layer.css" />
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+6
-2
@@ -2,6 +2,7 @@ import { LitElement } from 'lit';
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import { marked } from 'marked';
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import DOMPurify from 'dompurify';
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import { t } from './i18n.js';
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import { highlightMarkdownCodeBlocks } from './highlight.js';
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marked.use({ breaks: true, gfm: true });
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@@ -36,13 +37,16 @@ export function renderMarkdown(text) {
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// `target` is not in DOMPurify's default attribute allow-list, so the
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// external-link hook above needs it whitelisted here to survive sanitization.
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const html = DOMPurify.sanitize(marked.parse(text ?? ''), { ADD_ATTR: ['target'] });
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// Syntax-highlight fenced code blocks whose language we support (hljs escapes
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// its own output; unknown fences stay plain).
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const highlighted = highlightMarkdownCodeBlocks(html);
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// Wrap fenced code blocks in .md-code-wrap so a copy button can float over
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// them on hover. `<pre>` reaches this point only from a marked code block —
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// a literal one in the source text is escaped by sanitize, so the string
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// replace cannot wrap anything else.
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const btn = `<button type="button" class="md-code-copy" title="${t('chat.copy_code')}"><i class="bi bi-clipboard"></i></button>`;
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return html.replaceAll('<pre>', `<div class="md-code-wrap">${btn}<pre>`)
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.replaceAll('</pre>', '</pre></div>');
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return highlighted.replaceAll('<pre>', `<div class="md-code-wrap">${btn}<pre>`)
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.replaceAll('</pre>', '</pre></div>');
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}
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// One delegated listener serves every copy button renderMarkdown has ever
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@@ -0,0 +1,72 @@
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import hljs from '../vendor/hljs/core.min.js';
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import DOMPurify from 'dompurify';
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import python from '../vendor/hljs/languages/python.min.js';
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import javascript from '../vendor/hljs/languages/javascript.min.js';
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import typescript from '../vendor/hljs/languages/typescript.min.js';
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import json from '../vendor/hljs/languages/json.min.js';
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import yaml from '../vendor/hljs/languages/yaml.min.js';
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import bash from '../vendor/hljs/languages/bash.min.js';
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hljs.registerLanguage('python', python);
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hljs.registerLanguage('javascript', javascript);
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hljs.registerLanguage('typescript', typescript);
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hljs.registerLanguage('json', json);
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hljs.registerLanguage('yaml', yaml);
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hljs.registerLanguage('bash', bash);
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// File extension → hljs language. Extensions not listed here render as plain
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// text (never auto-detected: guessing wrong is worse than no colors).
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const LANG_FOR_EXT = {
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py: 'python',
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js: 'javascript', mjs: 'javascript', cjs: 'javascript', jsx: 'javascript',
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ts: 'typescript', tsx: 'typescript',
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json: 'json',
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yml: 'yaml', yaml: 'yaml',
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sh: 'bash', bash: 'bash', zsh: 'bash', fish: 'bash',
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};
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// Markdown fence info string → hljs language (common aliases included).
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const LANG_FOR_FENCE = {
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py: 'python', python: 'python',
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js: 'javascript', jsx: 'javascript', mjs: 'javascript', cjs: 'javascript', javascript: 'javascript',
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ts: 'typescript', tsx: 'typescript', typescript: 'typescript',
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json: 'json',
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yml: 'yaml', yaml: 'yaml',
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sh: 'bash', bash: 'bash', shell: 'bash', zsh: 'bash',
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};
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export function codeLangForExt(ext) {
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return LANG_FOR_EXT[ext] ?? null;
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}
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/**
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* Highlight `code` as `lang`, returning sanitized HTML (hljs escapes the input
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* itself; DOMPurify is belt-and-braces). Returns null when the language is not
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* registered, so callers can fall back to plain text.
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*/
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export function highlightCode(code, lang) {
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if (!lang || !hljs.getLanguage(lang)) return null;
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return DOMPurify.sanitize(hljs.highlight(code, { language: lang }).value);
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}
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/**
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* Post-process sanitized marked HTML: highlight every `<pre><code
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* class="language-…">` whose fence maps to a registered language, in place.
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* Unknown fences are left as the plain (already escaped) text marked emitted.
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*/
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export function highlightMarkdownCodeBlocks(htmlStr) {
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if (!htmlStr.includes('language-')) return htmlStr;
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const tpl = document.createElement('template');
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tpl.innerHTML = htmlStr;
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let changed = false;
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for (const code of tpl.content.querySelectorAll('pre > code[class*="language-"]')) {
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const fence = [...code.classList].find(c => c.startsWith('language-'))?.slice(9);
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const lang = LANG_FOR_FENCE[fence];
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const out = lang && highlightCode(code.textContent ?? '', lang);
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if (!out) continue;
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code.innerHTML = out;
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code.classList.add('hljs');
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changed = true;
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}
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return changed ? tpl.innerHTML : htmlStr;
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}
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@@ -46,6 +46,7 @@
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<link rel="stylesheet" href="css/agent-tasks.css" />
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<link rel="stylesheet" href="css/inbox-cards.css" />
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<link rel="stylesheet" href="css/file-viewer.css" />
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<link rel="stylesheet" href="css/hljs-theme.css" />
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<!-- pdf.js TextLayer's DOM contract (selectable text over the rendered pages). -->
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<link rel="stylesheet" href="/vendor/pdf-text-layer.css" />
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<link rel="stylesheet" href="css/mobile.css" />
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Vendored
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/**
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* Minified by jsDelivr using Terser v5.39.0.
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* Original file: /npm/highlight.js@11.11.1/es/languages/bash.js
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*
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* Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
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*/
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function bash(e){const s=e.regex,t={},n={begin:/\$\{/,end:/\}/,contains:["self",{begin:/:-/,contains:[t]}]};Object.assign(t,{className:"variable",variants:[{begin:s.concat(/\$[\w\d#@][\w\d_]*/,"(?![\\w\\d])(?![$])")},n]});const a={className:"subst",begin:/\$\(/,end:/\)/,contains:[e.BACKSLASH_ESCAPE]},i=e.inherit(e.COMMENT(),{match:[/(^|\s)/,/#.*$/],scope:{2:"comment"}}),c={begin:/<<-?\s*(?=\w+)/,starts:{contains:[e.END_SAME_AS_BEGIN({begin:/(\w+)/,end:/(\w+)/,className:"string"})]}},o={className:"string",begin:/"/,end:/"/,contains:[e.BACKSLASH_ESCAPE,t,a]};a.contains.push(o);const r={begin:/\$?\(\(/,end:/\)\)/,contains:[{begin:/\d+#[0-9a-f]+/,className:"number"},e.NUMBER_MODE,t]},l=e.SHEBANG({binary:`(${["fish","bash","zsh","sh","csh","ksh","tcsh","dash","scsh"].join("|")})`,relevance:10}),m={className:"function",begin:/\w[\w\d_]*\s*\(\s*\)\s*\{/,returnBegin:!0,contains:[e.inherit(e.TITLE_MODE,{begin:/\w[\w\d_]*/})],relevance:0};return{name:"Bash",aliases:["sh","zsh"],keywords:{$pattern:/\b[a-z][a-z0-9._-]+\b/,keyword:["if","then","else","elif","fi","time","for","while","until","in","do","done","case","esac","coproc","function","select"],literal:["true","false"],built_in:["break","cd","continue","eval","exec","exit","export","getopts","hash","pwd","readonly","return","shift","test","times","trap","umask","unset","alias","bind","builtin","caller","command","declare","echo","enable","help","let","local","logout","mapfile","printf","read","readarray","source","sudo","type","typeset","ulimit","unalias","set","shopt","autoload","bg","bindkey","bye","cap","chdir","clone","comparguments","compcall","compctl","compdescribe","compfiles","compgroups","compquote","comptags","comptry","compvalues","dirs","disable","disown","echotc","echoti","emulate","fc","fg","float","functions","getcap","getln","history","integer","jobs","kill","limit","log","noglob","popd","print","pushd","pushln","rehash","sched","setcap","setopt","stat","suspend","ttyctl","unfunction","unhash","unlimit","unsetopt","vared","wait","whence","where","which","zcompile","zformat","zftp","zle","zmodload","zparseopts","zprof","zpty","zregexparse","zsocket","zstyle","ztcp","chcon","chgrp","chown","chmod","cp","dd","df","dir","dircolors","ln","ls","mkdir","mkfifo","mknod","mktemp","mv","realpath","rm","rmdir","shred","sync","touch","truncate","vdir","b2sum","base32","base64","cat","cksum","comm","csplit","cut","expand","fmt","fold","head","join","md5sum","nl","numfmt","od","paste","ptx","pr","sha1sum","sha224sum","sha256sum","sha384sum","sha512sum","shuf","sort","split","sum","tac","tail","tr","tsort","unexpand","uniq","wc","arch","basename","chroot","date","dirname","du","echo","env","expr","factor","groups","hostid","id","link","logname","nice","nohup","nproc","pathchk","pinky","printenv","printf","pwd","readlink","runcon","seq","sleep","stat","stdbuf","stty","tee","test","timeout","tty","uname","unlink","uptime","users","who","whoami","yes"]},contains:[l,e.SHEBANG(),m,r,i,c,{match:/(\/[a-z._-]+)+/},o,{match:/\\"/},{className:"string",begin:/'/,end:/'/},{match:/\\'/},t]}}export{bash as default};
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//# sourceMappingURL=/sm/de51d06e654380eeba27e164aa3184c082d7ebd41695db22b9cadc02d289a657.map
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/**
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* Minified by jsDelivr using Terser v5.37.0.
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* Original file: /npm/highlight.js@11.11.1/es/languages/json.js
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*
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* Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
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*/
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function json(e){const a=["true","false","null"],n={scope:"literal",beginKeywords:a.join(" ")};return{name:"JSON",aliases:["jsonc"],keywords:{literal:a},contains:[{className:"attr",begin:/"(\\.|[^\\"\r\n])*"(?=\s*:)/,relevance:1.01},{match:/[{}[\],:]/,className:"punctuation",relevance:0},e.QUOTE_STRING_MODE,n,e.C_NUMBER_MODE,e.C_LINE_COMMENT_MODE,e.C_BLOCK_COMMENT_MODE],illegal:"\\S"}}export{json as default};
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//# sourceMappingURL=/sm/cc8c22863ca08ad2642e2c51559f66774c360ac66c3780814484c6d4373e04c3.map
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+8
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/**
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* Minified by jsDelivr using Terser v5.39.0.
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* Original file: /npm/highlight.js@11.11.1/es/languages/python.js
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*
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* Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files
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*/
|
||||
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||||
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||||
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*
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Reference in New Issue
Block a user