61
Yes, it is possible. A minimal setup would be:
:set filetype=json
:syntax on
:set foldmethod=syntax
41
As Jorengarenar said in their answer "{{{2 has to do with foldmarkers. Now, what are foldmarkers anyway? What are they useful for? And how do you use them?
First let's notice that the strings you mention in your question are composed of three parts:
" the comment character. This is specific to the filetype of your buffer, here it is " because ...
28
You can press V to go into Visual Line mode, select the lines to be folded, then zf to make a manual fold. You'll need to :set foldmethod=manual if it isn't already set.
You can open the fold with zo, or delete the fold with zd.
25
I have the following modelines at the bottom of my vimrc which I copied from godlygeek, the author of tabular:
"" vim:fdm=expr:fdl=0
"" vim:fde=getline(v\:lnum)=~'^""'?'>'.(matchend(getline(v\:lnum),'""*')-2)\:'='
This will make any line starting with 2+ "'s a fold. The more "'s the deeper the fold. This ...
17
Do set foldmethod=expr and use 'foldexpr' to set a vim script expression that will define the fold start points.
set foldmethod=expr
set foldexpr=get(split(getline(v:lnum-1)),0,'')!=get(split(getline(v:lnum)),0,'')?'>1':'='
This looks more complicated than it is, because we can't easily use spaces in :set, but with spaces, and a newline or 2, it looks ...
16
Folding only the comments is fairly easy by using foldmethod=expr:
set foldmethod=expr foldexpr=getline(v:lnum)=~'^\\s*'.&commentstring[0]
This will simply check if the line starts with any amount of whitespace followed by a comment character. Note that this is fairly naïve and may not work for all languages since commentstring can be more complex than ...
15
Using an expression mapping is the easiest way to do this:
nnoremap <expr> <CR> &buftype ==# 'quickfix' ? "\<CR>" : 'za'
This defines a mapping that checks whether you are in the quickfix window, and then performs either a <CR> or za accordingly.
See:
:h :map-expr
:h 'buftype'
:h expr1
:h string
Mapping to a function
You can ...
13
Two lines vs. one line
In Vim, all lines within a fold will be collapsed to a single line, and the 'foldtext' option then determines the synopsis of those lines (usually dashes, the number of folded lines, and content from the first (or all) lines).
In your example, in Vim only the {...} parameter block itself is folded; the line above (that uses the ...
13
It's fold marker. Read more :h fold-marker
12
From :help 'foldexpr':
It is evaluated for each line to obtain its fold level
The foldexpr is evaluated, so it needs to be VimL code; there is no mention of "special syntax" or the like. The result of this evaluation controls what Vim considers a fold or not.
Possible values are
0 the line is not in a fold
1, 2, .. ...
12
The 'foldmethod' is a window-local option; setting it from your ~/.vimrc doesn't necessarily have the right effect.
Because syntax folding is bound to the html filetype, these settings belong to ~/.vim/after/ftplugin/html.vim:
setlocal foldmethod=syntax
This depends on having filetype plugin on in your ~/.vimrc, which you probably have. You can also ...
12
Given that your example is in Python, which relies on correct indentation of code blocks it is enough to base folding on that:
:set foldmethod=indent
For more information on the varieties of folding available see :help foldmethod
11
It is a good idea to first define your own categories in your .vimrc (like a list with sublists and subsublists) and add all your plugins/settings/functions to the respective categories. Combined with customized folding this can work great:
The example above shows possible categories that I find helpful to structure my .vimrc. It uses the following ...
11
The foldopen setting controls which commands will open folds. In :help 'foldopen' we can see the list of possible values:
item commands
all any
block "(", "{", "[[", "[{", etc.
hor horizontal movements: "l", "w", "fx", etc.
insert any command in ...
10
Vim doesn't come with PHP syntax folding built-in. However, if all of your code is properly indented (as your example is), you can use a different fold method:
:set foldmethod=indent
10
So you want to toggle between all lines folded and no lines folded.
Does this mapping do what you want?
:nnoremap <expr> <f2> &foldlevel ? 'zM' :'zR'
10
You could try the terrific NarrwRgn plugin by our very own Christian Brabandt, which has always worked very well for me.
Just select the lines you're interested in in visual mode, and then type :NR to open a new buffer containing just that area. Any changes you :write in the new buffer will appear instantly in the original, and you can simply close it when ...
9
First: Did you bother to read the vimtex documentation, i.e. :h vimtex-folding? The docs clearly point out that the fold-expr method of folding is slow, and so therefore provides an option g:vimtex_fold_manual which if enabled (set to nonzero value) will set foldmethod=manual, and instead will remap zx and zX to recalculate the folds when necessary (...
9
You can use the line() function to fold or unfold your file:
" In your vimrc
if line('$') > 20
set foldlevel = 1
endif
line('$') returns the line number of the last ($) line of your document.
Of course, this is executed only when you are launching Vim, so you can use a autocommand like so:
autocmd! BufReadPost * :if line('$') > 20 | set ...
8
Folding lists in VimWiki
According to the documentation in vimwiki version 2.1 (the latest I found), there are a few fold methods, and of them only one works for folding list items.
The setting is in the variable g:vimwiki_folding. from :help g:vimwiki_folding:
Enable/disable vimwiki's folding (outline) functionality. Folding in vimwiki
can uses ...
8
Sure:
set foldmethod=syntax
You can then use zc to close a fold, zo to open one, or za to toggle.
Unfortunately, Vim doesn't include folding information for Python by default, which you appear to be using. You could use one of many external resources, however.
8
Use a ! to force the writing, even if the file doesn't exist:
:folddoopen .:w! >> file
8
I use my primary vimrc as a link to several other categorized files, sourcing each as it goes along, e.g. Vim options in one file, plugin settings in another.
"--- Vim Options
source ~/.vim/config/vim_options.vim
"--- Here Be Functions!
" (need to be sourced before stuff that uses 'em)
runtime! functions/*.vim
"--- Key Mapping
source ~/.vim/config/...
8
You could say that "best practice" is preeminently a matter of opinion, :) but there are two approaches that (1) make obvious sense, and (2) can be applied to all config files, not only Vim's: folding by logical sections and subsections (or even deeper, if you feel brave), and splitting your config into several smaller files and :source-ing them.
I ...
8
zi inverts the option foldenable. But you don't want to invert it, you want to disable it. So put the following in your .vimrc:
set nofoldenable
8
I do exactly this for one file I refer to a lot NOTES.otl I performed the following in my .vimrc:
" Useful for my Quick Notes feature in my tmuxrc
augroup QuickNotes
au BufWrite,VimLeave NOTES.otl mkview
au BufRead NOTES.otl silent loadview
augroup END
What this means is that in your case you can handle manual folds using the :mkview and :...
8
I don't know how to achieve exactly what you want, only a part.
You want to hide some text inside ~/.vimrc (for example).
First we need to know which highlight group handles the text you want to hide.
Add this mapping to your ~/.vimrc :
map <F10> :echo "hi<" . synIDattr(synID(line("."),col("."),1),"name") . '> trans<'
\ . synIDattr(synID(...
8
You can hack around with some custom syntax and the use of the conceal:
syntax region FunctionArguments start=+(+hs=e+1 end=+)+he=e-1 conceal cchar=…
set concealleval=1
e.g.
function (a, b, c, d, e)
function (…)
Careful though, with this basic example, all () will be concealed, so a little more work must be done here, but it should be a good opportunity ...
7
The following seems to patch syntax folding onto the Pascal syntax that ships with Vim. Put this into ~/.vim/after/syntax/pascal.vim:
syn clear pascalLabel pascalStatement pascalStruct
syn keyword pascalLabel goto label
syn keyword pascalStatement procedure function
syn keyword pascalStatement program const var type
if !exists("pascal_traditional")
...
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