胖鸭
2011-01-25 03:05
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如何在 Vim 中启用自动折叠?

How do I enable automatic folding in Vim? set foldmethod=syntax doesn't seem to do much of anything.

转载于:https://stackoverflow.com/questions/4789605/how-do-i-enable-automatic-folds-in-vim

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3条回答 默认 最新

  • 叼花硬汉 2011-01-25 03:06
    已采纳

    To allow folds based on syntax add something like the following to your .vimrc:

    set foldmethod=syntax
    set foldlevelstart=1
    
    let javaScript_fold=1         " JavaScript
    let perl_fold=1               " Perl
    let php_folding=1             " PHP
    let r_syntax_folding=1        " R
    let ruby_fold=1               " Ruby
    let sh_fold_enabled=1         " sh
    let vimsyn_folding='af'       " Vim script
    let xml_syntax_folding=1      " XML
    

    Syntax based folding is defined in the language's syntax files which are located in $VIM/syntax. But some languages don't have folding rules built into their syntax files. For example Python. For those languages you need to download something from http://vim.sf.net that does folds. Otherwise you will need to use folds based on indents. To do this effectively you will likely want to add the following to your .vimrc file:

    set foldmethod=indent
    set foldnestmax=2
    

    Other kinds of folding

    There are 6 types of folds:

    manual          manually define folds
    indent          more indent means a higher fold level
    expr            specify an expression to define folds
    syntax          folds defined by syntax highlighting
    diff            folds for unchanged text
    marker          folds defined by markers in the text
    

    Personally I only use syntax folds. Usually I just want to fold the method and not fold every indent level. Inconsistent indenting and weirdly formatted legacy code at work often makes indent folding difficult or impossible. Adding marks to the document is tedious and people who don't use Vim won't maintain them when they edit the document. Manual folds work great until someone edits your code in source control and all your folds are now in the wrong place.

    More reading

    1. See :help fold-methods to learn the details of different fold methods.
    2. See :help folding to learn the keyboard commands for manipulate folds.
    3. See :help folds for help on the entire topic of folding.
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  • lrony* 2015-07-01 12:50

    JavaScript folding didn't work for me either. I found out when I did set syntax=javaScript (with a capital S), it suddenly worked.

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  • 狐狸.fox 2016-08-19 11:38

    The way to enable folding in new versions of Vim has changed (I'm using vim 7.4). Now you should create the file ~/.vim/ftplugin/javascript.vim (on linux) and add your code folding instructions as explained in Eric Johnson's answer. File type detection and loading plugins for specific file types must be enabled by putting this into your .vimrc:

    filetype plugin on
    
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