问题
When a fold is collapsed in vim, all of the nested headings are hidden away so that you can't see what's inside. I'm curious if anyone knows if it's possible or has a solution for foldtext function (or through another method) that can display the sections inside a fold when a fold is collapsed.
I'm looking for something that would display folds more like this:
+ -- 2000 TopSection1 " Fold Level 1
+ --- 500 TopSection1 : ChildSection1 " Fold Level 2
+ ---- 50 TopSection1 : ChildSection1 : BottomSection1 " Fold Level 3
+ --- 100 TopSection1 : ChildSection2 : BottomSection1 " Fold Level 2
+ -- 500 TopSection2 " Fold Level 1
+ --- 25 TopSection2 : ChildSection1 " Fold Level 2
I've been digging around, but have not figured out a method to make this work (or if it's possible). Any suggestions?
回答1:
You will have to play with foldtext but also to parse the content of the section to fetch what you want to display.
回答2:
the following command gets all folding lines without the body texts in between :
:g/{{{/
It works for this example below that contains multiple nested folds with foldmethod=marker and default ({{{) mark :
Text 1/*{{{*/
some text here
subtext 1.1/*{{{*/
some text here
subsubtext 1.1.1/*{{{*/
some text here/*}}}*/
subsubtext 1.1.2/*{{{*/
some text here/*}}}*//*}}}*/
subtext 1.2/*{{{*/
some text here
subsubtext 1.2.1/*{{{*/
some text here/*}}}*/
subsubtext 1.2.2/*{{{*/
some text here/*}}}*//*}}}*//*}}}*/
Text 2/*{{{*/
some text here
subtext 2.1/*{{{*/
some text here
subsubtext 2.1.1/*{{{*/
some text here/*}}}*/
subsubtext 2.1.2/*{{{*/
some text here/*}}}*//*}}}*/
subtext 2.2/*{{{*/
some text here
subsubtext 2.2.1/*{{{*/
some text here/*}}}*/
subsubtext 2.2.2/*{{{*/
some text here/*}}}*//*}}}*//*}}}*/
After you run the :g/{{{/ command, you get this :
Text 1/*{{{*/
subtext 1.1/*{{{*/
subsubtext 1.1.1/*{{{*/
subsubtext 1.1.2/*{{{*/
subtext 1.2/*{{{*/
subsubtext 1.2.1/*{{{*/
subsubtext 1.2.2/*{{{*/
Text 2/*{{{*/
subtext 2.1/*{{{*/
subsubtext 2.1.1/*{{{*/
subsubtext 2.1.2/*{{{*/
subtext 2.2/*{{{*/
subsubtext 2.2.1/*{{{*/
subsubtext 2.2.2/*{{{*/
If you want to redirect the result to a new buffer, then you can run :
:let @a='' | execute 'g/{{{/y A' | new | setlocal bt=nofile | put! a
It yanks the {{{ pattern to register "a", opens a new buffer and pastes the reg.
You may then need to expand the result with zR if your default is 'collapse folds'.
回答3:
I use zr and zm normal commands to open and close another folding level. I agree that zr will also show text between a folding level and a sub-level ; hence it does not fully address your question. It's seems that a better way would be to use foldmethod=syntax and then filter all folding lines with a global (g) command based on the regex of the foldmethod syntax.
来源：https://stackoverflow.com/questions/27392059/is-it-possible-to-display-nested-sections-in-a-collapsed-fold-with-vim