How to map Ctrl+A and Ctrl+Shift+A differently?
Gvim doesn't do it because vim cannot do it (under normal circumstances). Sorry, but that's just how it is.
However...
Some terminals (e.g., xterm and iterm2) can be configured to send an arbitrary escape sequence for any combination of keys.
For example, add the following to .Xresources for xterm to send <Esc>[65;5u for CtrlShiftA. You can then map that in Vim to <C-S-a>. (65 is the decimal Unicode value for shift-a and 5 is the bit for the ctrl modifier. The u in this case stands for "unicode".)
! .Xresources
XTerm*vt100.translations: #override Ctrl ~Meta Shift <Key>a: string(0x1b) string("[65;5u")
iTerm and [u]rxvt can also be configured to do this (examples not provided).
More info: http://www.leonerd.org.uk/hacks/fixterms/
As already pointed out, there are no ways to map <C-S-A> differently from <C-A>.
However, using tools like autokey (for linux & windows) or autohotkey (for windows), you can remap <C-S-A> to send a different key-stroke(s) for specific applications.
e.g. On my system, I have this setting in autokey:
$ cat ~/.config/autokey/data/gnome-terminal/ctrlshifta-gnome-terminal.py
#ctrl+shift+a sends '<S-F1>a'
keyboard.send_keys("<shift>+<f1>a") # Note that `f` in `f1` needs to be in lower case.
Assign it these properties:
- keyboard-shortcut as
ctrl+shift+a - window class:
gnome-terminal-server.Gnome-terminal
Then your ~/.vimrc can create mapping for <S-F1>a to do whatever you want.
Notes:
- I have used
<S-F1>as kind of leader key for detecting<C-S>. This was because my terminal did not accept<F13>-<F37>etc keys. If your application supports it, (gvimdoes I think) using those keys is recommended. - I mainly
vimingnome-terminal. So I usedwindow class = gnome-terminal-server.Gnome-terminalas filter. Modify it to usegvimif you want.autokeysupports a button for capturing any other window's properties like class/title.
If what bothers you is loosing existing C-V functionality, you can use C-Q instead. See, :help CTRL-V-alternative.