fix: preserve problem Markdown and add full-statement copying by boomzero · Pull Request #1031 · XMOJ-Script-dev/XMOJ-Script

boomzero · 2026-10-02T14:29:56Z

What does this PR aim to accomplish?:

Fix copied problem Markdown losing TeX expressions and paragraph/line breaks, and add the requested section, sample, and full-statement copying controls. Closes #1030. Closes #1011.

How does this PR accomplish the above?:

Recover original TeX from KaTeX and MathJax, including XMOJ's MathJax 3.0.5, without modifying the rendered math.
Preserve paragraph and hard line breaks, normalize HTML formatting indentation in prose, preserve preformatted explanations as fenced code blocks, keep display formulas and paragraph separation within table cells, preserve empty columns, and retain list separation. Remove paragraph collapsing from the legacy copy path.
Serialize ordinary header tables as Markdown with alignment, escaped pipes and multiline cells. Preserve headerless, merged, nested, preformatted and linked tables as HTML, restoring TeX and resolving image/link URLs.
Add a copy button beside the problem title and on the samples section in both interfaces. Every problem section copy includes its ## heading.
Build complete statements with a # title, ordered section headings, numbered sample headings and plain code fences, sample explanations, data ranges and hints. Omit absent/empty sections and preserve sample whitespace.
Read the currently displayed language, exclude copy-button labels and injected problem IDs from the output, and avoid duplicate controls during rerenders.
Run 44 browser fixture cases automatically with npm test and the Test workflow. Playwright remains test tooling; no userscript runtime dependency is added.

Validation:

node --check XMOJ.user.js and git diff --check passed.
npm test: all 15 Node test entries passed, including 44 browser fixture cases, the existing contest tests, and missing/duplicate extraction-anchor checks.
Reproduce with npm install, npx playwright install chromium, and npm test. XMOJ_CHROMIUM can select an existing Chromium executable.
The actual Vue contest bundle was tested against mocked read-only API data: full-statement and samples buttons, paragraph/TeX preservation, active-language switching, empty-section omission, and duplicate-control prevention passed.
The human table review is covered by section/full-copy callbacks and table regressions. A Marked 4.3.0 render check verifies 14 table examples, including formulas, merged cells, nested tables, captions, links and preformatted whitespace.
The human review’s boarding example is covered by section/full-copy regressions: seat diagrams remain fenced, and prose has no extra blank lines or leading tabs. A separate Marked 4.3.0 render check preserves all four code blocks and both diagrams exactly.
Classic markup fixtures exercise the real shared clipboard callbacks, visible-language switching in both directions, wrapped sample containers, numbered samples, and untrimmed preformatted whitespace.
Real KaTeX 0.16.11 and XMOJ's MathJax 3.0.5 were also verified in the original copy-button checks.

By submitting this pull request, I confirm the following:

I have read the above and my PR is ready for review. Check this box to confirm

Summary by Sourcery

Preserve formulas and Markdown formatting when copying content from contest problem and solution pages.

Bug Fixes:

Preserve TeX source, math delimiters, paragraph spacing, Markdown hard breaks, and preformatted whitespace when copying contest content as Markdown.

Enhancements:

Support TeX extraction from KaTeX, MathML, and both legacy and current MathJax APIs without modifying the rendered DOM.

CI:

Run browser-based Markdown copy regression tests in CI with Playwright and Chromium.

Tests:

Add browser regression coverage for mathematical content, Markdown formatting, tables, lists, legacy copying, whitespace, DOM preservation, and extraction-anchor validation.

Chores:

Bump the userscript and package version to 3.7.2.

Summary by cubic

Preserves TeX source and Markdown formatting when copying contest problem and solution content, and adds copy buttons for full statements, titled sections, and samples. Closes #1030 and #1011.

Recovers TeX from KaTeX annotations, MathML, and both modern and legacy MathJax expression lists without touching rendered math.
Converts simple tables to pipe tables with alignment; keeps merged, nested, math-bearing, or link-bearing tables as HTML with TeX restored and absolute URLs. Preserves math delimiters, paragraph and hard line breaks, preformatted explanations and samples as fenced code blocks, list separation, and wrapped sample containers; code fences keep the language from pre and code classes and outlast backtick runs in the source.
Adds copy buttons beside titles and section headings; full statements use # and ## headings, numbered samples with plain fences, explanations, ranges, and hints, omitting empty sections.
Reads the currently displayed language and excludes copy-button labels and injected problem IDs from the output; controls stay idempotent across rerenders.
Adds Playwright-based browser fixture coverage run through npm test and the Test workflow, and bumps the version to 3.7.2.

^{Written for commit 461e353. Summary will update on new commits.}

sourcery-ai · 2026-10-02T14:30:14Z

Reviewer's Guide

Updates Markdown extraction to recover source TeX from KaTeX and both legacy/current MathJax representations, preserve paragraph spacing, hard breaks, and preformatted whitespace without mutating the DOM, and adds ten browser regressions plus version metadata updates.

Flow diagram for Markdown copy extraction

flowchart TD
    A[Contest content element] --> B[GetMDText]
    B --> C[Collect MathJax expressions]
    C --> D{Math source available}
    D -->|MathJax| E[AppendMath with source and display delimiters]
    D -->|KaTeX annotation| E
    D -->|No| F[Traverse DOM nodes]
    F --> G{Node formatting}
    G -->|BR| H[Append hard break or preformatted newline]
    G -->|Block| I[Append paragraph or list spacing]
    G -->|PRE| J[Preserve whitespace]
    G -->|Other text| K[Append text content]
    E --> L[Markdown result]
    H --> L
    I --> L
    J --> L
    K --> L

File-Level Changes

Change	Details	Files
Extract original TeX from rendered math while leaving the page DOM untouched.	Build a MathJax root-to-expression map using both newer lookup APIs and XMOJ’s legacy expression list. Read KaTeX/MathML TeX annotations and emit inline or display Markdown delimiters. Avoid traversing duplicated visual and accessibility math trees.	`XMOJ.user.js`
Preserve Markdown structural whitespace during recursive HTML conversion.	Emit blank lines around block elements and distinguish list/table row spacing. Convert non-preformatted elements to Markdown hard breaks while retaining plain newlines in . Continue converting images and table cells while maintaining existing whitespace behavior.	`XMOJ.user.js`
Add browser regression coverage for Markdown copying behavior.	Cover paragraphs, hard breaks, KaTeX, MathML, both MathJax API shapes, raw TeX, preformatted content, images, and tables. Assert the source fixture DOM is unchanged after conversion.	`tests/markdown-copy.html`
Synchronize release metadata for the fix.	Bump userscript and package versions to 3.7.2. Update distribution metadata.	`XMOJ.user.js` `package.json` `Update.json`

Possibly linked issues

[Bug] 新 UI 比赛中题目复制 Markdown 出现问题 #1030: PR specifically fixes the issue’s reported Markdown copying problems with KaTeX formulas and line breaks.

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cloudflare-workers-and-pages · 2026-10-02T14:30:28Z

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boomzero · 2026-10-02T14:34:14Z

@zsTree0830

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zsTree0830 · 2026-10-02T15:01:23Z

@boomzero TeX 好了但是换行还是坏的

boomzero · 2026-10-02T15:05:57Z

@boomzero TeX 好了但是换行还是坏的

Working on it

boomzero · 2026-10-02T15:07:12Z

#1011 too

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All reported issues were addressed across 6 files (changes from recent commits).

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sourcery-ai · 2026-10-02T15:23:12Z

Sourcery has withdrawn its approval of this pull request. It auto-reviews a pull request 5 times, and this push is past that limit, so the approval no longer reflects code Sourcery has read.

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boomzero · 2026-10-03T00:25:01Z

Works in my tests.

zsTree0830

我说真的
这个还是坏的：

## 样例输入输出

### 样例输入 #1

```plain
3
2 5
3 10
1 5
```

### 样例输出 #1

```plain
19
```

### 样例说明 #1

一开始的状况是：

人  123
       123 座位


	第一秒，每个人向右移动一个位置，$3$ 到了自己的座位 $1$。然后 $3$ 要花 $5$ 秒放行李，$1$ 和 $2$ 跟着等待。

人      12
       123 座位


	之后 $1$ 和 $2$ 花 $3$ 秒同时移动到自己的座位，分别要花 $5$ 秒和 $10$ 秒放行李，总共放行李的时间是 $10$ 秒。


	总时间是：$1+5+3+10=19$ 秒。

代码块没有了
还有每段之间多了一个换行
除了第一段，其他段的段首都多了一个 Tab

zsTree0830 · 2026-10-03T03:01:58Z

@boomzero

boomzero · 2026-10-03T05:18:46Z

@zsTree0830 前面漏看了你这条正式 review，抱歉。你指出的三个问题已在 e37be7b 中处理：

样例说明里的 <pre> 现在输出 fenced code block，座位示意图的空格和换行保留；已有代码语言标签也会保留。
普通段落中的 HTML 排版换行、缩进会规范化，不再与段落分隔叠加出额外空行。
段首的排版 Tab 不再带入 Markdown；代码块内部的 Tab 和空格保持原样。

新增了按你贴出的登机样例构造的回归用例，同时验证「样例输入输出」和整题复制按钮。旧实现能重现多余换行和 Tab；修复后 35 个浏览器用例全部通过。另用脚本已有的 Marked 4.3.0 渲染复制结果，确认得到 4 个代码块，两幅座位图内容完全保留，说明段落没有额外空行或段首 Tab。请用最新提交复测原题。

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zsTree0830

@boomzero 表格

boomzero · 2026-10-03T10:54:26Z

@zsTree0830 表格已在 9dd0add 中处理。之前确实只是把单元格连接成 Tab 分隔文本，粘贴后不会渲染成表格。

现在有表头的普通表格会生成 Markdown 表格，保留列对齐，单元格内的换行用 <br>，竖线会转义，KaTeX/MathJax 仍复制原始 TeX。没有表头、含合并单元格、嵌套表格或代码块的表格会保留 HTML 结构，避免增加空表头或丢失结构；其中的公式也会替换回 TeX，图片和链接会保留正确的地址。

新增并更新了表格回归用例，同时检查分节复制和整题复制。全部 43 个浏览器用例通过；另用 Marked 4.3.0 渲染 13 个表格示例，验证了行列、竖线、公式、单元格换行、合并/嵌套表格和代码块空白。请用最新提交复测。

cubic-dev-ai

All reported issues were addressed across 3 files (changes from recent commits).

_{Tip: Review your code locally with the cubic CLI to iterate faster.

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fix: preserve TeX and line breaks when copying contest Markdown

db5a460

pull-request-size Bot added the size/L label Oct 2, 2026

hendragon-bot Bot added the user-script This issue or pull request is related to the main user script label Oct 2, 2026

github-actions Bot added 2 commits October 2, 2026 14:30

3.7.2

2174975

Update version info to 3.7.2

32945a4

boomzero marked this pull request as ready for review October 2, 2026 14:33

github-actions Bot force-pushed the codex/fix-1030-markdown-copy branch from bcbf199 to b2a7504 Compare October 2, 2026 14:33

Update time and description of 3.7.2

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fix: address Markdown copy review feedback and automate browser tests

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Comment thread XMOJ.user.js Resolved

feat: add titled section, sample and full problem Markdown copying

58f4f59

Update time and description of 3.7.2

d1b0fd1

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boomzero and others added 2 commits October 3, 2026 08:21

fix: add spacing before classic problem copy buttons

bef6b35

Update time and description of 3.7.2

04b204b

This was linked to issues Oct 3, 2026

[Feature Request] For Copy Problem Statement Markdown #1011

Closed

[Bug] 新 UI 比赛中题目复制 Markdown 出现问题 #1030

Closed

zsTree0830 requested changes Oct 3, 2026

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boomzero and others added 4 commits October 3, 2026 13:05

test: share the classic English statement expectation

4ddc11d

Update time and description of 3.7.2

bd5da91

fix: retain explanation code blocks and normalize prose whitespace

e37be7b

Update time and description of 3.7.2

e14342c

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boomzero requested a review from zsTree0830 October 3, 2026 06:36

boomzero and others added 2 commits October 3, 2026 14:37

fix: detect code language across pre and code classes

ae1fcb3

Update time and description of 3.7.2

ff06d97

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boomzero and others added 2 commits October 3, 2026 18:53

fix: preserve rendered tables in copied problem Markdown

9dd0add

Update time and description of 3.7.2

998b795

Update time and description of 3.7.2

e3cdc23

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boomzero and others added 3 commits October 3, 2026 20:34

fix: preserve links in copied header tables

83b5852

Update time and description of 3.7.2

6b6f425

Update time and description of 3.7.2

461e353

boomzero merged commit 6c8faf1 into dev Oct 3, 2026
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boomzero deleted the codex/fix-1030-markdown-copy branch October 3, 2026 12:39

boomzero mentioned this pull request Oct 3, 2026

Emergency release: merge dev into master #1033

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Reviewer's Guide

Flow diagram for Markdown copy extraction

File-Level Changes

Possibly linked issues

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