vim 格式化代码之长行换行

为了让长行能自动换行，首先在～/.vimrc中 设置了textwidth=72,

然后gq=G 或者 gggqG,

发现最大的问题就是是把好几行拼接起来，实现换行了。

比如：

557

00:47:39,487 --> 00:47:42,453

I will have to complete some procedures,

and I asked you to check out what they are for me

gg=G之后：

557 00:47:39,487 --> 00:47:42,453 I will

have to complete some procedures, and I

asked you to check out what they are for

me

设置formatoptions+=w就可以了。

这个链接说的很清楚了：
http://stackoverflow.com/questions/1318470/change-wrap-width-in-a-text-file-using-vim
问题：

I want to format srt subtitle text files to avoid wrapping problems on my media player.

I need to set a line wrap width to a number of characters e.g. 43

I can do this with Editplus, its a built in function and works well. The reason I want to do it in Vim, firstly Editplus is only available on the PC and the secondly Vim is badass.

I have found the following solution on the net..

:set tw=43

gggqG

It does work, but not exactly how I want it.

E.g.

I have this text:

557

00:47:39,487 --> 00:47:42,453

I will have to complete some procedures,

and I asked you to check out what they are for me

after I format it, I get:

557 00:47:39,487 --> 00:47:42,453 I will

have to complete some procedures, and I

asked you to check out what they are for

me

It seems to ignore line breaks/CRs. As you can see the "I will" has been added to the first line.

How do I get it to not ignore line breaks?

EDIT: apoligies about the formatting, first time using stackoverflow!

解决办法：

You could use the whitespace option of

formatoptions

and make the lines you want to
wrap end in whitespace.

:set tw=43
:set fo+=w
:g/^\a/s/$/ /
gggqG

The third line adds a space on the end of any line starting with a letter and

fo+=w

stops

gq

from
joining lines that don't end in spaces.

See:

:help fo-table
:help 'formatoptions'
:help gq
:help :g

Edit in response to comments

:g/^\a/s/$/ /

This translates to:

:g/   " Search the file
^\a   " For lines starting (^) with an alphabetic character (\a - equivalent to [A-Za-z])
/     " Then on each line that the regexp matches (i.e. each line starting with an alphabetic character)
s/    " Substitute...
$     " The end of line (zero-width match at the end of the line)
/ /   " With a space (slashes are delimiters)

The global (

:g

) command will only operate on the current file, but the

textwidth

and

formatoptions

lines
will last for the whole session. If you want those options to only be used on the current buffer, use

:setlocal

instead:

:setlocal tw=43
:setlocal fo+=w
:help :setlocal

参考：

http://blog.sina.com.cn/s/blog_8d05143b0100yb2p.html