fix: set "compress_to_zip" compress level to 0

[LiHua000]

Log: as title

Summary by Sourcery

Bug Fixes:

• Correct the compression level for 'compress to zip/7z' operations so they use level 0 instead of level 1.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Sets the compression level to 0 when starting the app in 'compress to zip/7z' mode to align with the intended behavior for the ST_Compresstozip7z startup type.

File-Level Changes

Change	Details	Files
Adjust default compression level used in compress-to-zip/7z startup flow.	Update compression options in slotFinishCalculateSize to use compression level 0 instead of 1 for ST_Compresstozip7z startup type. Ensure that when the main window finishes calculating size in compress-to-zip/7z mode, the resulting archive is created with no compression (store mode) by default.	src/source/mainwindow.cpp

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider replacing the magic numeric compression levels (0/1) with named constants or an enum to make the intent of the chosen level clearer and easier to maintain.
• If there is a single place where default compression behavior is defined, it may be cleaner to derive stOptions.iCompressionLevel from that shared configuration rather than hardcoding it in this code path.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider replacing the magic numeric compression levels (0/1) with named constants or an enum to make the intent of the chosen level clearer and easier to maintain.
- If there is a single place where default compression behavior is defined, it may be cleaner to derive `stOptions.iCompressionLevel` from that shared configuration rather than hardcoding it in this code path.

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[deepin-ci-robot]

deepin pr auto review

针对这段 git diff 的代码变更，我进行了仔细的审查。以下是从语法逻辑、代码质量、代码性能和代码安全四个方面提出的详细审查意见和改进建议：

1. 语法逻辑

• 变更分析：

  • 代码将 stOptions.iCompressionLevel 的赋值从 1 修改为 0。
  • 上下文判断条件是 StartupType::ST_Compresstozip7z == m_eStartupType，意味着当启动类型为"压缩为 zip 或 7z 格式"时触发。
  • 后续逻辑（未显示完整）似乎涉及 DConfig 配置读取，可能与压缩方法有关。

• 潜在逻辑风险：

  • 数值含义：在大多数压缩库（如 7z SDK 或 zlib）中，压缩级别 0 通常代表不压缩（Store 模式），仅打包文件；而 1 代表最快速度（低压缩率）的压缩。
  • 业务意图：如果业务意图是"快速压缩"，将级别改为 0 可能会导致生成的文件体积非常大，失去了压缩软件的意义。如果是为了极致的打包速度，这个修改是合理的，但需要确认是否真的不需要压缩。
  • 配置覆盖：代码后面紧接着读取 DConfig（isOrderMode()）。如果配置文件中也定义了压缩级别，需要确认这里的硬编码 0 是否会被后续的配置逻辑覆盖。如果后续逻辑是基于 stOptions 继续修改，那么这里的 0 是基础值；如果后续逻辑忽略了 stOptions 而直接使用配置值，则此行修改可能无效。

2. 代码质量

• 硬编码：

  • 0 和 1 是"魔术数字"（Magic Numbers）。直接在代码中使用它们降低了可读性。
  • 改进建议：建议定义枚举或常量来明确压缩级别的含义。例如：

    // 在头文件或公共定义处
    enum CompressionLevel {
        LEVEL_STORE = 0,    // 不压缩
        LEVEL_FASTEST = 1,  // 最快速度
        // ...
    };
    
    // 使用时
    stOptions.iCompressionLevel = CompressionLevel::LEVEL_STORE;

    这样一眼就能看出代码将压缩级别设置为了"存储"模式。

• 代码风格：

  • if 语句的格式在 diff 中看起来有些缩进不一致（可能是 diff 显示问题，但在实际代码中应注意 #ifdef 块内的缩进）。

3. 代码性能

• 直接影响：
  • 将压缩级别改为 0 会极大地提高压缩操作的速度（因为省去了 CPU 密集型的计算过程），对于大量小文件或超大文件的场景，启动速度会显著提升。
  • 副作用：磁盘 I/O 写入量会增加（因为压缩后的数据量更大），且生成的文件占用空间显著增加。这是一种"以空间换时间"的策略。

4. 代码安全

• 安全性：
  • 此修改本身不直接引入内存溢出或注入漏洞。
  • 资源耗尽风险：由于压缩级别设为 0，生成的文件体积可能远大于源文件。如果用户压缩了一个巨大的日志文件或虚拟磁盘镜像，可能会迅速耗尽磁盘空间。建议在 UI 上提示用户当前是"不压缩/仅打包"模式，或者在处理超大文件时增加磁盘空间检查。

总结与改进建议

这段代码修改将特定启动模式下的默认压缩级别从 1（最快压缩）改为了 0（不压缩）。

主要建议：

1. 确认业务需求：请务必确认这是否是预期的行为。如果是为了解决特定场景下压缩速度慢的问题，改为 0 是有效的，但代价是文件体积变大。如果仅仅是为了提高速度，保留 1（最快压缩）通常是一个更折中的方案。
2. 消除魔术数字：使用枚举或宏定义替代 0，提高代码可读性。
3. 检查配置逻辑：确认后续的 DConfig 逻辑是否会正确覆盖或基于这个 0 值工作，避免出现"用户设置了高压缩，但代码强制设为 0"的逻辑冲突。

代码重构示例：

// 建议在类或全局头文件中定义
const int COMPRESSION_LEVEL_STORE = 0;
const int COMPRESSION_LEVEL_FASTEST = 1;

void MainWindow::slotFinishCalculateSize(...)
{
    if (StartupType::ST_Compresstozip7z == m_eStartupType) {
        // 明确指定为存储模式（不压缩），如果确实需要此逻辑
        stOptions.iCompressionLevel = COMPRESSION_LEVEL_STORE; 
        
#ifdef DTKCORE_CLASS_DConfigFile
        // 注意检查这里的逻辑是否会受到上面赋值的影响
        if(m_pCompressSettingPage->isOrderMode()) {
            // ...

结论：从语法上没有错误，但从逻辑上看，将压缩级别设为 0 是一个较大的功能性变更，需要谨慎评估其对用户体验（文件体积）和系统资源（磁盘空间）的影响。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: LiHua000, max-lvs

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