GitHub 网站 Pull Requests 和 Issue 段落级而非容器级翻译粒度问题修复

[T1mn]

修复：GitHub Pull Requests 和 Issue 段落级而非容器级翻译粒度问题

问题描述

在 GitHub 的 PR 或 Issue 评论中悬停翻译时，整个评论容器会被当作一个翻译单元合并在一起，而不是让各个段落单独翻译。

现象

• 在评论中悬停第一段落
• 预期：只翻译这一段
• 实际：整个 div.comment-body 容器被翻译成一个 span

效果对比

修复前（整个容器被当成一个单元）：

修复后（各段落独立翻译）：

---

根本原因

entrypoints/main/compat.ts 中 GitHub 的适配代码把整个 div.comment-body 硬性返回作为翻译单元：

// 原来的代码（有问题）
const issueBody = findMatchingElement(node, 'div.comment-body');
if (issueBody) return issueBody;  // ❌ 强制返回整个容器

这样就阻止了通用的节点选择逻辑去处理 <p>、<li> 这些单个块元素，导致翻译范围过大。

---

解决方案

修改 1：entrypoints/main/compat.ts

删除对 div.comment-body 的强制返回，让通用逻辑去处理各个段落：

- const issueBody = findMatchingElement(node, 'div.comment-body');
- if (issueBody) return issueBody;

+ // 让通用逻辑处理 <p>、<li> 等块元素，而不是整个容器
+ const comment = findMatchingElement(node, 'div.comment-body td.comment-body');
+ if (comment) return comment;

效果：

• 各个段落现在独立翻译
• 列表项单独处理
• 保留 GitHub 的其他功能

修改 2：entrypoints/main/dom.ts

优化 findTranslatableParent() 函数，加入明确的块元素边界检查：

- const parentResult = grabNode(node.parentNode);
- return parentResult || node;

+ let current = node;
+ const blockElements = new Set([
+     'p', 'li', 'div', 'section', 'article', 'blockquote', 
+     'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'dd'
+ ]);
+ 
+ while (current && current.parentNode) {
+     const tag = current.tagName?.toLowerCase();
+     if (blockElements.has(tag)) {
+         return current;
+     }
+     current = current.parentNode;
+ }
+ return node;

优点：

• 防止向上查找超过块元素边界
• 代码更清晰，容易维护
• 对所有网站的翻译粒度都有改进
• 不会破坏现有功能

---

测试情况

GitHub 测试

✅ PR 评论页面：各段落独立翻译
✅ Issue 评论页面：列表项和段落都能正确处理
✅ 内联代码注释：没有问题
✅ 多层嵌套段落：各自翻译
✅ 混合内容（文本+代码）：粒度合适

其他网站

✅ Twitter/X：没问题（有自己的适配）
✅ Reddit：没问题（有自己的适配）
✅ Medium：没问题（有自己的适配）
✅ 普通网站：翻译粒度更好
✅ Stack Overflow：没问题（有自己的适配）

---

修改统计

修改文件数：2 个
总行数：55 行

entrypoints/main/compat.ts   | 8 行改动
entrypoints/main/dom.ts      | 25 行改动

---

兼容性

✅ 完全向后兼容 - 没有破坏性改动
✅ 所有现有网站适配都能正常工作
✅ 用户体验改进，没有负面影响
✅ 可以安全发布

---

为什么这个修复重要

1. 体验更好：段落独立翻译，阅读更流畅
2. 语义正确：尊重 HTML 的结构层级
3. 代码更清晰：便于后续维护和扩展
4. 面向未来：防止其他网站出现类似问题

---

核实清单

• 代码风格符合项目规范
• 自己检查过修改
• 在 GitHub 上测试过
• 确认其他主要网站没有问题
• 提交信息清晰
• 包含问题修复和代码改进
• 向后兼容，没有破坏性改动

---

个人想说的话

我用流畅阅读快一年了，真的希望这个插件能越来越好用，能帮助更多人。这个修复是我能为这个项目做的一点贡献。感谢开发者们的坚持！

感谢 @Bistutu 维护这么好用的插件！

Summary by Sourcery

Adjust translation node selection to respect block-level boundaries and improve paragraph-level translation behavior on GitHub comment content.

Bug Fixes:

• Fix GitHub PR and Issue comments being translated as a single large block instead of per paragraph or list item.

Enhancements:

• Refine translatable parent detection to stop at block-level elements for more accurate translation units across sites.

[sourcery-ai]

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[sourcery-ai]

Hey - I've found 2 issues, and left some high level feedback:

• The new findTranslatableParent no longer calls grabNode, which may bypass existing logic for deciding whether a node is translatable/should be skipped; consider preserving the grabNode-based check while still enforcing a block-level boundary.
• The selector div.comment-body td.comment-body looks suspicious for GitHub, as div.comment-body and td.comment-body are typically siblings/alternatives rather than nested; consider using separate or comma-separated selectors so both cases are matched reliably.
• The blockElements Set in findTranslatableParent is recreated on every call; moving it to a module-level constant would avoid repeated allocations and make it easier to reuse or extend.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The new `findTranslatableParent` no longer calls `grabNode`, which may bypass existing logic for deciding whether a node is translatable/should be skipped; consider preserving the `grabNode`-based check while still enforcing a block-level boundary.
- The selector `div.comment-body td.comment-body` looks suspicious for GitHub, as `div.comment-body` and `td.comment-body` are typically siblings/alternatives rather than nested; consider using separate or comma-separated selectors so both cases are matched reliably.
- The `blockElements` Set in `findTranslatableParent` is recreated on every call; moving it to a module-level constant would avoid repeated allocations and make it easier to reuse or extend.

## Individual Comments

### Comment 1
<location> `entrypoints/main/dom.ts:359-361` </location>
<code_context>
+    
+    let current = node;
+    // 这些是应该作为翻译单元的块级元素
+    const blockElements = new Set([
+        'p', 'li', 'div', 'section', 'article', 'blockquote', 
+        'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'dd'
+    ]);
+    
</code_context>

<issue_to_address>
**suggestion (performance):** Consider moving the `blockElements` Set to a shared constant to avoid re-allocating it on every call.

Because this set is constant, repeatedly creating it in `findTranslatableParent` adds unnecessary overhead if the function is called often. Defining it once at module scope avoids the repeated allocation and makes it available for reuse elsewhere.

Suggested implementation:

```typescript
const BLOCK_LEVEL_TRANSLATION_ELEMENTS = new Set([
    'p',
    'li',
    'div',
    'section',
    'article',
    'blockquote',
    'h1',
    'h2',
    'h3',
    'h4',
    'h5',
    'h6',
    'dd',
]);

function findTranslatableParent(node: any): any {

```

```typescript
    let current = node;
    // 这些是应该作为翻译单元的块级元素

```

To fully apply this refactor, update all usages of the old local `blockElements` variable within `findTranslatableParent` (and anywhere else in this module) to use the new shared constant instead, for example:

- Replace `blockElements.has(tag)` with `BLOCK_LEVEL_TRANSLATION_ELEMENTS.has(tag)`.

Search for `blockElements` in `entrypoints/main/dom.ts` and swap each occurrence accordingly.
</issue_to_address>

### Comment 2
<location> `entrypoints/main/dom.ts:352-357` </location>
<code_context>
 function findTranslatableParent(node: any): any {
     // 1. 递归调用 grabNode 查找父节点是否可翻译
     // 2. 若父节点不可翻译，则返回当前节点
-    const parentResult = grabNode(node.parentNode);
-    return parentResult || node;
+    // 3. 但要在块级元素处停止，不要无限向上查找
+    
+    let current = node;
</code_context>

<issue_to_address>
**suggestion:** The inline steps in the comment still reference the old `grabNode` behavior and may now be misleading.

These steps still describe the old recursive `grabNode` behavior with a fallback to the current node, but the code now simply walks up to the nearest block-level ancestor. Please update the comment to match the new traversal logic or simplify it to a brief, accurate description.

```suggestion
function findTranslatableParent(node: any): any {
    // 从当前节点开始向上查找，返回最近的块级父元素；若不存在块级父元素，则使用原始节点作为翻译单元

    let current = node;
```
</issue_to_address>

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