feat(reader): PDF 改 pdf.js 渲染+斜体 bug 根治+评论假挂载修复+排版类

【T1 PDF 内置阅读重做】iframe 对 arXiv PDF 实测 ERR_ABORTED(浏览器 PDF
插件策略差异)→ pdfjs-dist 6.4.299 客户端 canvas 渲染:只在 /papers/
动态 import(worker ?url 打包,不进全站 bundle);文档一次取回 + IO
懒渲染(rootMargin 400px)+ 页占位 aspect-ratio 防跳动 + 12s 首屏兜底 +
微信 UA 直接兜底;工具条页码/缩放/翻页/下载/arXiv/授权声明保留。红线:
PDF 由访客浏览器直取 arXiv(CORS * 实测),仓内零副本。真页实测:
13 页 canvas 全绘制、首屏墨迹像素非空、零 console 错误。

【T2 斜体排版 bug 真凶】global.css 的 `.prose-* p > em:only-child
{ display:block; text-align:center }` 图注样式按"斜体独占段"自动命中,
把所有正文独占段斜体变成块级居中。改:图注用显式 .fig-cap 驱动 + 补
em/i { display:inline; font-style:italic } 基线;media-sample 迁移新写法,
指南注明旧写法失效原因。实测独占段与行内斜体均 display:inline/italic。

【T3 评论"假挂载"真 bug】原 initArtalk 一进来就置 mounted=true——脚本
404/被拦截时把空容器误标已挂载,5s 兜底被绕过,正是"评论区一直空着"的
来源之一。改为库就绪才算成功;另加三触发路径(IO 主 + 锚点点击 + 滚到
页底 2s 兜底)、5s 失败提示+重试钮、软导航重挂、成功打
data-artalk-mounted=1 供 E2E。

【T4 文章排版类 + 安全白名单】11 个受限类(ink-1/2/3/muted/accent、
font-serif/kai/sans/mono、drop-cap、quote-line、fig-cap)全走 tokens 禁
任意 hex;新增 rehype-class-whitelist.ts:className 白名单 + 剥离 style
与 on*;实测注入用例只剩 class="ink-2",style/onclick 全无。新坑入档:
markdown raw HTML 在 hast 是 type:'raw' 节点、白名单插件看不见 span,必须
先 rehype-raw 再过滤 → 插件链 [rehypeRaw, rehypeClassWhitelist,
rehypeLinkCards]。新依赖:pdfjs-dist、rehype-raw。

车道:op-artalk(T1 6/6、T2 2/2、T3 3/3、T4 6/6);收编复验:build 46 页、
E2E 37/37、四专项 playwright 实测(PDF 13 canvas/斜体 inline/白名单净化/
评论 mounted 标记)

验证: node v26.13.0 + astro 7.4.4 构建 46 页 exit 0;E2E 37/37 PASS

Spec: none (阅读体验四件,车道级交付)

Co-authored-by: GLM-5.3
This commit is contained in:
wait4xandGLM-5.3 committed 2026-11-02 15:59:28 +08:00
1 parent 328ab68f18
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@@ -1,9 +1,11 @@
---
// 论文内置阅读视图(非路由共享件,_ 前缀不成页):双语薄壳 papers/agensh.astro 与
// en/papers/agensh.astro 共用。许可证红线:arXiv nonexclusive-dist 1.0 禁止第三方
// 再分发——PDF 只经 iframe 指向 arXiv 原站,仓内不存任何 PDF 副本。
// 微信内置浏览器内嵌 PDF 基本不可用:UA 检测在 head 前置(无闪烁),微信下不发起
// iframe 请求,直接呈现兜底卡(含"右上角用浏览器打开"指引)。
// en/papers/agensh.astro 共用。
// 许可证红线:arXiv nonexclusive-dist 1.0 禁止第三方再分发——PDF 只由**访客浏览器直取
// arXiv**(响应带 access-control-allow-origin: *),仓内不存任何 PDF 副本。
// 渲染改用 pdf.js canvas 逐页画(iframe 方案实测 arXiv PDF 请求被浏览器 PDF 插件策略
// ERR_ABORTED,无法内嵌全文);pdfjs 只在 /papers/ 页动态 import,不进全站 bundle。
// 微信内置浏览器:不发起 PDF 请求,直接兜底卡(含"右上角用浏览器打开"指引)。
import BaseLayout from '../../layouts/BaseLayout.astro';
import { t } from '../../i18n/ui';
import type { Locale } from '../../lib/locale';
@@ -57,17 +59,26 @@ const p = PAPERS[paper];
</a>
</header>
<!-- iframe 无初始 src:脚本确认非微信后才挂载,微信内不产生无用请求 -->
<div class="paper-stage">
<iframe
id="paper-frame"
class="paper-frame"
data-src={p.pdf}
title={p.alt[locale]}
allow="fullscreen"
></iframe>
<!-- 阅读工具条:页码 / 上一下一页 / 缩放 -->
<div class="paper-toolbar" id="paper-toolbar" hidden>
<span class="pt-page" id="paper-page-label">{t('paper_page_label', locale)} – / –</span>
<span class="pt-group">
<button type="button" class="pt-btn" id="paper-prev" aria-label={t('paper_prev_page', locale)}>‹</button>
<button type="button" class="pt-btn" id="paper-next" aria-label={t('paper_next_page', locale)}>›</button>
</span>
<span class="pt-group">
<button type="button" class="pt-btn" id="paper-zoom-out" aria-label={t('paper_zoom_out', locale)}>−</button>
<span class="pt-zoom" id="paper-zoom-label">100%</span>
<button type="button" class="pt-btn" id="paper-zoom-in" aria-label={t('paper_zoom_in', locale)}>+</button>
</span>
<span class="pt-status" id="paper-status">{t('paper_loading', locale)}</span>
</div>
<!-- 兜底卡:微信 UA(JS 加 is-wechat)或 iframe 加载超时后显形 -->
<div class="paper-stage" id="paper-stage">
<!-- canvas 逐页容器(pdf.js 渲染;脚本按页懒创建 canvas) -->
<div class="paper-canvas-wrap" id="paper-canvas-wrap" data-pdf={p.pdf} role="document" aria-label={p.alt[locale]}></div>
<!-- 兜底卡:微信 UA / 加载失败或超时 / 无 JS 时显形 -->
<div class="paper-fallback" id="paper-fallback" hidden>
<p class="paper-fallback-title">{t('paper_fallback_title', locale)}</p>
<p class="paper-fallback-hint" data-wechat-only hidden>{t('paper_wechat_hint', locale)}</p>
@@ -88,34 +99,156 @@ const p = PAPERS[paper];
</article>
</BaseLayout>
<script is:inline data-astro-rerun>
// data-astro-rerun:ClientRouter 软导航后内联脚本默认不重跑,不加则从别的页面切进
// 本页时 iframe 永不挂载(ThemeScript 同款坑,2026-10-25 已记录)
(function () {
var frame = document.getElementById('paper-frame');
if (!frame) return;
var fallback = document.getElementById('paper-fallback');
var wechat = /MicroMessenger/i.test(navigator.userAgent);
document.documentElement.classList.toggle('is-wechat', wechat);
<script>
// pdf.js 客户端渲染:文档一次取回,页面 canvas 按 IntersectionObserver 懒渲染(长文不爆内存)。
// 软导航换页后按当前 DOM 重新接线(astro:page-load);任何失败一律显兜底卡,不阻塞阅读。
const boot = async () => {
if (!/^\/(?:en\/)?papers\/[^/]+\/?$/.test(location.pathname)) return;
const wrap = document.getElementById('paper-canvas-wrap') as HTMLElement | null;
const toolbar = document.getElementById('paper-toolbar') as HTMLElement | null;
const fallback = document.getElementById('paper-fallback') as HTMLElement | null;
const statusEl = document.getElementById('paper-status') as HTMLElement | null;
const pageLabel = document.getElementById('paper-page-label') as HTMLElement | null;
const zoomLabel = document.getElementById('paper-zoom-label') as HTMLElement | null;
if (!wrap || !fallback || wrap.dataset.paperBooted === '1') return;
wrap.dataset.paperBooted = '1';
function showFallback(withWechatHint) {
if (!fallback) return;
const showFallback = (wechat = false) => {
fallback.hidden = false;
var hint = fallback.querySelector('[data-wechat-only]');
if (hint) hint.hidden = !withWechatHint;
}
document.documentElement.classList.toggle('is-wechat', wechat);
const hint = fallback.querySelector('[data-wechat-only]') as HTMLElement | null;
if (hint) hint.hidden = !wechat;
};
const setStatus = (text: string) => {
if (!statusEl) return;
statusEl.textContent = text;
statusEl.hidden = text === '';
};
if (wechat) {
// 微信 webview 内嵌 PDF 基本不可用:不挂载 iframe,直接兜底 + 浏览器指引
// 微信内置浏览器:不发起 PDF 请求(渲染必然不可用,白等带宽)
if (/MicroMessenger/i.test(navigator.userAgent)) {
showFallback(true);
return;
}
var settled = false;
frame.addEventListener('load', function () { settled = true; });
frame.src = frame.dataset.src;
// arXiv 现无 X-Frame-Options(实测 2026-11-01),超时兜底只作弱网/拦截保险
setTimeout(function () { if (!settled) showFallback(false); }, 9000);
})();
let doc: any = null;
let zoom = 1;
const pageEls: { el: HTMLDivElement; canvas: HTMLCanvasElement; page: number; rendered: boolean; ratio: number }[] = [];
let io: IntersectionObserver | null = null;
let renderedAny = false;
const fail = (err: unknown) => {
console.warn('[paper] 渲染失败,回落兜底卡', err);
showFallback(false);
};
// 12s 内连第一页都没画出来就兜底(弱网/被拦截)
const guard = window.setTimeout(() => { if (!renderedAny) showFallback(false); }, 12000);
try {
const pdfjs: any = await import('pdfjs-dist');
const workerUrl = (await import('pdfjs-dist/build/pdf.worker.min.mjs?url')).default;
pdfjs.GlobalWorkerOptions.workerSrc = workerUrl;
doc = await pdfjs.getDocument({ url: wrap.dataset.pdf }).promise;
window.clearTimeout(guard);
setStatus('');
if (toolbar) toolbar.hidden = false;
// 先建全部页占位(页高按第一页比例估算,避免滚动跳动),IO 到达再真正 render
const first = await doc.getPage(1);
const baseVp = first.getViewport({ scale: 1 });
const wrapWidth = wrap.clientWidth || 720;
const renderScale = () => (wrapWidth / baseVp.width) * zoom * (window.devicePixelRatio || 1);
for (let n = 1; n <= doc.numPages; n++) {
const el = document.createElement('div');
el.className = 'paper-page';
el.dataset.page = String(n);
const canvas = document.createElement('canvas');
el.appendChild(canvas);
wrap.appendChild(el);
pageEls.push({ el, canvas, page: n, rendered: false, ratio: baseVp.height / baseVp.width });
el.style.aspectRatio = `${baseVp.width} / ${baseVp.height}`;
}
const renderPage = async (entry: (typeof pageEls)[number]) => {
if (entry.rendered) return;
entry.rendered = true;
const page = await doc.getPage(entry.page);
const vp = page.getViewport({ scale: renderScale() });
const c = entry.canvas;
c.width = vp.width;
c.height = vp.height;
c.style.width = '100%';
c.style.height = 'auto';
await page.render({ canvasContext: c.getContext('2d')!, viewport: vp, canvas: c }).promise;
entry.el.style.aspectRatio = '';
if (!renderedAny) {
renderedAny = true;
setStatus('');
}
};
io = new IntersectionObserver(
(entries) => {
for (const e of entries) {
if (!e.isIntersecting) continue;
const entry = pageEls.find((p) => p.el === e.target);
if (entry) void renderPage(entry);
}
},
{ rootMargin: '400px 0px' },
);
pageEls.forEach((p) => io!.observe(p.el));
// 页码跟随滚动(页中点越过视口 40% 即视为当前页)
const currentPage = () => {
const mid = window.scrollY + window.innerHeight * 0.4;
for (const p of pageEls) {
if (p.el.getBoundingClientRect().bottom + window.scrollY > mid) return p.page;
}
return pageEls.length;
};
const label = () => {
if (pageLabel) pageLabel.textContent = `${currentPage()} / ${doc.numPages}`;
};
addEventListener('scroll', label, { passive: true });
label();
const gotoPage = (n: number) => {
const target = pageEls[Math.max(0, Math.min(pageEls.length - 1, n - 1))];
target?.el.scrollIntoView({ block: 'start', behavior: 'smooth' });
};
document.getElementById('paper-prev')?.addEventListener('click', () => gotoPage(currentPage() - 1));
document.getElementById('paper-next')?.addEventListener('click', () => gotoPage(currentPage() + 1));
const rerenderVisible = async () => {
if (zoomLabel) zoomLabel.textContent = `${Math.round(zoom * 100)}%`;
// 仅重绘当前视口内的页(其余等 IO 重新触发)
for (const p of pageEls) {
const r = p.el.getBoundingClientRect();
if (r.bottom > -200 && r.top < window.innerHeight + 200) {
p.rendered = false;
await renderPage(p);
} else {
p.rendered = false;
}
}
};
document.getElementById('paper-zoom-in')?.addEventListener('click', () => {
zoom = Math.min(2.5, zoom + 0.25);
void rerenderVisible();
});
document.getElementById('paper-zoom-out')?.addEventListener('click', () => {
zoom = Math.max(0.6, zoom - 0.25);
void rerenderVisible();
});
} catch (err) {
window.clearTimeout(guard);
fail(err);
}
};
document.addEventListener('astro:page-load', () => void boot());
</script>
<style>
@@ -161,19 +294,62 @@ const p = PAPERS[paper];
white-space: nowrap;
}
.paper-download:hover { border-color: var(--accent); color: var(--accent); }
/* 工具条:灰阶克制,mono 小字 */
.paper-toolbar {
display: flex;
align-items: center;
gap: var(--space-3);
padding: var(--space-2) 0;
border-bottom: 1px solid var(--line);
font-family: var(--font-mono);
font-size: 12px;
color: var(--ink-3);
flex-wrap: wrap;
}
.paper-toolbar[hidden] { display: none; }
.pt-group { display: inline-flex; align-items: center; gap: 6px; }
.pt-btn {
font-family: var(--font-mono);
font-size: 14px;
line-height: 1;
width: 30px;
height: 30px;
border-radius: 8px;
border: 1px solid var(--line);
background: var(--bg-soft);
color: var(--ink-1);
cursor: pointer;
}
.pt-btn:hover { border-color: var(--accent); }
.pt-page { color: var(--ink-2); }
.pt-zoom { min-width: 3.2em; text-align: center; color: var(--ink-2); }
.pt-status { color: var(--ink-4); }
.paper-stage {
position: relative;
flex: 1;
min-height: 0;
}
.paper-frame {
width: 100%;
/* canvas 页容器:纵向滚动,页间留缝,纸色底 */
.paper-canvas-wrap {
height: 100%;
border: 0;
background: var(--surface-2, #f4f4f2);
overflow-y: auto;
overscroll-behavior: contain;
padding: var(--space-3) 0;
background: var(--bg-soft);
}
/* 微信内不挂 iframe,避免空白框占位 */
:global(html.is-wechat) .paper-frame { display: none; }
.paper-canvas-wrap:empty { min-height: 12rem; }
.paper-page {
width: min(100%, calc(var(--measure) + 80px));
margin: 0 auto var(--space-3);
background: var(--bg);
border: 1px solid var(--line);
border-radius: 6px;
overflow: hidden;
box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}
.paper-page canvas { display: block; width: 100%; }
.paper-fallback {
position: absolute;
inset: 0;
@@ -184,9 +360,9 @@ const p = PAPERS[paper];
gap: var(--space-2);
text-align: center;
padding: var(--space-3);
background: var(--surface-2, #f4f4f2);
background: var(--bg-soft);
border: 1px dashed var(--line);
border-radius: var(--radius, 8px);
border-radius: 8px;
}
.paper-fallback[hidden] { display: none; }
.paper-fallback-title { font-weight: 600; margin: 0; }