为什么此Vim映射的行为取决于进入可视模式的方式而有所不同? [英] Why does this Vim mapping behave differently depending on how Visual mode was entered?

问题描述

此问题是什么在这里提示了我的上一个问题: Vim的(插入)可视"模式?

This question is what prompted a previous question of mine here: Vim's '(insert) VISUAL' mode?

在该问题中，我询问了"VISUAL"模式与"(insert) VISUAL"模式之间的关系，在该模式下，您可以直接从插入模式进入可视模式.我发现一个映射的行为根据可视模式的子类型"而有所不同，但我不明白为什么:

In that question I asked about "VISUAL" mode vs "(insert) VISUAL" mode, which is where you enter visual mode directly from insert mode. I have found a mapping that behaves differently depending on the "subtype" of visual mode, and I don't understand why:

vnoremap x <Esc>jjj
vnoremap <A-[> <C-G>ugv

第一个映射说明了Vim如何使映射保持一致:从"VISUAL"模式按 x 并从"(insert) VISUAL模式会同时将光标向下移动3行.后者不会退出以进入插入模式并输入三个j.因此，即使在映射之外，<Esc>的行为也不会有所不同，即使它在映射之外的行为也不同于这两种模式.

The first mapping illustrates how Vim goes out of its way to make mappings to behave consistently: pressing x from "VISUAL" mode and pressing x from "(insert) VISUAL" mode will both move the cursor down 3 lines. The latter does not exit to insert mode and enter three j's. So <Esc> is not behaving differently depending on the mode, even though outside of a mapping it would behave differently from these two modes.

第二个映射说明了某些映射的行为不一致.如果突出显示一个单词并按 ALT + ["，则在"VISUAL"模式下将单词替换为ugv，但在"<(insert) VISUAL模式.大概是因为Vim正在执行撤消"和重新选择可视化"的普通模式命令ugv.

The second mapping illustrates how some maps behave inconsistently. If you highlight a word and press ALT+[ then the word is replaced with ugv if done from "VISUAL" mode but nothing happens if done from "(insert) VISUAL" mode. Presumably this is because Vim is executing the normal mode commands ugv for 'undo' and 'reselect-visual'.

这是一个奇怪的不一致之处.这是调试映射时遇到的一个最小示例，并且想知道为什么这样做会如此.

This is a strange inconsistency. It is a minimal example I ran into when debugging my mappings, and would like to know why it works this way.

推荐答案

我可以复制您的示例，我认为您的分析是正确的.

I can reproduce your examples and I think your analysis is right.

当我从(插入)视觉模式键入 <C-G>ugv时，我得到了预期的结果:<C-G>切换到(插入)select 模式，ugv用这些字符替换选择.映射的行为应相同.

When I type <C-G>ugv from (insert) visual mode, I get the expected results: <C-G> switches to (insert) select mode, ugv replaces the selection with those characters. A mapping should behave in the same way.

我猜这是一个错误；整个(insert)子模式非常特殊，不经常使用，因此容易出现错误.您可以自己研究源代码，也可以在 vim_dev邮件列表中提出此问题.由于问题的含糊不清，尽管如此，可能很难吸引开发人员的很多兴趣.

I guess this is a bug; the entire (insert) submode is quite special, not frequently used, and therefore prone to bugs. You could delve into the source code yourself, or raise this issue on the vim_dev mailing list. Due to the obscurity of the issue, it may be hard to garner much interest from the devs, though.

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