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I would like to map <Tab> in select mode to indent my selection.

So I have this:

$ vim -u /dev/null
:set nocompatible
:behave mswin
:xnoremap <Tab>   >gv
:xnoremap <S-Tab> <gv
:snoremap <Tab> <C-g>>gvV<C-g>
:snoremap <S-Tab> <C-g><gvV<C-g>

The idea is to switch to S-LINE or V-LINE when identing. The problem with the above mapping is the V will toggle between VISUAL -> V-LINE -> NORMAL.

How can I correct these mappings?

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2

In visual mode, you only need one > to indent. >> is the normal mode command. Also, V turns a non-linewise selection into a linewise one, but if the selection already is linewise, visual mode will end. Better drop that. These changes result in:

snoremap <Tab> <Esc>gv>gv<C-g>

Actually, you can further simplify; there's no need to leave select mode and then restore the selection in visual mode via <Esc>gv; just use <C-g> to switch from select to visual mode:

snoremap <Tab> <C-g>>gv<C-g>
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  • Thanks for your answer, You actually pointed out my issue the >>. I have completed my question and your answer is no more valid. I hope you don't mind. – nowox Sep 6 '16 at 9:58
  • Ohhhh :( Actually this is a lot more complex that I thought... Going on linewise mode is complicated because if you select one line with <S-Down>, when you go on linewise mode, you actually select two lines instead of one... – nowox Sep 6 '16 at 10:01
  • Why would you explicitly switch to linewise mode? Indenting via > is linewise, anyway, regardless of the selection type. – Ingo Karkat Sep 6 '16 at 11:01
  • On other visual editors (Sublime/Notepad++/VisualStudio/...) when you select a part of several lines and you indent it, the selection mutates to linewise selection. It makes sense because you cannot really indent a part of the selection, but the whole lines. This is just for visual comfort – nowox Sep 6 '16 at 11:46
  • 2
    Ah, I see. Well, there is a way, but you'd either have to write a function, or use a :map <expr>, and check the output of visualmode() if it is already linewise (i.e. returns V), and only if not force linewise with gvV. – Ingo Karkat Sep 6 '16 at 13:06

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