检查当前选项卡在 Vim 中是否为空 [英] Check if current tab is empty in Vim

问题描述

我正在编写一个 vim 插件，我需要在其中检查用户正在查看的当前选项卡是否为空.如果它不为空，比如用户已经在查看缓冲区或有几个窗口，那么我想创建一个新的空选项卡并在那里工作我的插件.但是如果它是空的，我想在不打开新标签的情况下加载我的插件.

I am writing a vim plugin in which I need to check if the current tab the user is looking at is empty. If it is not empty, like say the user is already viewing a buffer or has a couple of windows, then I want to create a new empty tab and work my plugin there. But if it is empty, I want to load my plugin without opening a new tab.

我在文档中找不到任何合适的内容.

I couldn't find anything appropriate in the docs.

推荐答案

我唯一能想到的就是使用 :windo 遍历当前选项卡中的所有窗口并检查文件是否已加载.像这样:

The only thing that I can think of for this is to use :windo to iterate through all the windows in the current tab and check whether a file is loaded. Something like this:

function! TabIsEmpty()
    " Remember which window we're in at the moment
    let initial_win_num = winnr()

    let win_count = 0
    " Add the length of the file name on to count:
    " this will be 0 if there is no file name
    windo let win_count += len(expand('%'))

    " Go back to the initial window
    exe initial_win_num . "wincmd w"

    " Check count
    if win_count == 0
        " Tab page is empty
        return 1
    else
        return 0
    endif
endfunction

" Test it like this:
echo TabIsEmpty()

" Use it like this:
if TabIsEmpty() == 1
    echo "The tab is empty"
else
    echo "The tab is not empty"
endif

如果唯一打开的是帮助页面或预览窗口或类似的东西，它可能会返回 1，因为我不认为 windo 对它们进行操作.

If the only thing open is a help page or preview window or something like that, it will probably return 1 as I don't think windo operates over those.

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