-" Python Calculator
-command! -nargs=+ Calc :r! python -c "from math import *; print <args>"
+" Function key mappings
+map <F8> :call ToggleSpelling()<CR>
+imap <F8> <C-o>:call ToggleSpelling()<CR>
+map <F9> :call InvShow()<CR>
+imap <F9> <C-o>:call InvShow()<CR>
+map <F10> :call WrapToggle()<CR>
+imap <F10> <C-o>:call WrapToggle()<CR>
+map <F11> :call PasteToggle()<CR>
+imap <F11> <C-o>:call PasteToggle()<CR>
-" I frequently type :Q or :WQ, etc instead of :q, :wq
-command! WQA :wqa
-command! WqA :wqa
-command! WQa :wqa
-command! Wqa :wqa
-command! WA :wa
-command! Wa :wa
-command! WQ :wq
-command! Wq :wq
-command! W :w
-command! QA :qa
-command! Qa :qa
-command! Q :q
-
-" Unhighlight search results
-map <C-l> :nohlsearch<CR>:redraw!<CR>
+" Unhighlight search results and redraw the screen
+nmap <C-l> :nohlsearch<CR>:redraw!<CR>
" Map Y to be consistent with D, C, etc
-noremap Y y$
+nmap Y y$
" CTRL-n and CTRL-p to go forwards and backwards through files
-nnoremap <C-n> :next<CR>
-nnoremap <C-p> :prev<CR>
+nmap <C-n> :next<CR>
+nmap <C-p> :prev<CR>
" CTRL-J/K to move up and down, collapsing open windows
map <C-J> <C-W>j<C-W>_
map <C-K> <C-W>k<C-W>_
-" Press CTRL-X after pasting something to fix up formatting
+" Press CTRL-z after pasting something to fix up formatting
imap <C-z> <ESC>u:set paste<CR>.:set nopaste<CR>i
" Tab to switch between split windows
-map <Tab> <C-w><C-w>
+nmap <Tab> <C-w><C-w>
+nmap <Esc>[Z <C-w>W
+
+" Q to reformat paragraph. I never use ex mode anyway (default binding for Q)
+nmap Q gwip
+
+" Save using sudo
+command SudoWrite call SudoWriteFunction()
+
+" I frequently type :Q or :WQ, etc instead of :q, :wq
+command WQA :wqa
+command WqA :wqa
+command WQa :wqa
+command Wqa :wqa
+command WA :wa
+command Wa :wa
+command WQ :wq
+command Wq :wq
+command W :w
+command Wn :wn
+command WN :wn
+command Wp :wp
+command WP :wp
+command QA :qa
+command Qa :qa
+command Q :q
+
+" Make the number pad work
+map \eOX =
+imap \eOX =
+set t_KC=\eOp " 0
+set t_KD=\eOq " 1
+set t_KE=\eOr " 2
+set t_KF=\eOs " 3
+set t_KG=\eOt " 4
+set t_KH=\eOu " 5
+set t_KI=\eOv " 6
+set t_KJ=\eOw " 7
+set t_KK=\eOx " 8
+set t_KL=\eOy " 9
+
+" Toggle wordwrap
+function WrapToggle()
+ if &wrap
+ call WrapOff()
+ echo "Word wrap off"
+ else
+ call WrapOn()
+ echo "Word wrap on"
+ endif
+endfunction
+
+" Turn word wrap off, reset arrows, home, end, etc to default bindings
+function WrapOff()
+ setlocal nowrap
+ " Go up and down by physical linebreaks when not wordwrapped
+ iunmap <buffer> <End>
+ iunmap <buffer> <Home>
+ iunmap <buffer> <Down>
+ iunmap <buffer> <Up>
+ nunmap <buffer> <Down>
+ nunmap <buffer> <Up>
+ nunmap <buffer> <End>
+ nunmap <buffer> <Home>
+ nunmap <buffer> 0
+ nunmap <buffer> ^
+ nunmap <buffer> $
+ vunmap <buffer> <Down>
+ vunmap <buffer> <Up>
+ vunmap <buffer> <End>
+ vunmap <buffer> <Home>
+ vunmap <buffer> 0
+ vunmap <buffer> ^
+ vunmap <buffer> $
+ " Allow only backspace & space
+ set whichwrap=b,s
+endfunction
+
+" Turn word wrapping on and bind arrows, home, end, etc to display lines
+function WrapOn()
+ setlocal wrap
+ " Go up and down by display lines, not linebreaks when wordwrapped
+ imap <buffer> <End> <C-o>g$
+ imap <buffer> <Home> <C-o>g0
+ imap <buffer> <Down> <C-o>gj
+ imap <buffer> <Up> <C-o>gk
+ nmap <buffer> <Down> gj
+ nmap <buffer> <Up> gk
+ nmap <buffer> <End> g$
+ nmap <buffer> <Home> g0
+ nmap <buffer> 0 g0
+ nmap <buffer> ^ g^
+ nmap <buffer> $ g$
+ vmap <buffer> <Down> gj
+ vmap <buffer> <Up> gk
+ vmap <buffer> <End> g$
+ vmap <buffer> <Home> g0
+ vmap <buffer> 0 g0
+ vmap <buffer> ^ g^
+ vmap <buffer> $ g$
+ " Allow backspace, space, left/right keys to move across lines
+ set whichwrap=b,s,<,>,[,]
+endfunction
+
+
+" Toggle show invisible characters
+function InvShow()
+ if &list
+ echo "Invisible characters off"
+ set nolist
+ else
+ echo "Invisible characters on"
+ set listchars=tab:.\ ,trail:!
+ set list
+ endif
+endfunction
+
" Spell checking mode toggle
-function s:spell()
- if !exists("s:spell_check") || s:spell_check == 0
- echo "Spell check on"
- let s:spell_check = 1
- setlocal spell spelllang=en_au
- else
- echo "Spell check off"
- let s:spell_check = 0
- setlocal spell spelllang=
- endif
+function ToggleSpelling()
+ if !exists("s:spell_check") || s:spell_check == 0
+ echo "Spell check on"
+ let s:spell_check = 1
+ setlocal spell spelllang=en_au
+ else
+ echo "Spell check off"
+ let s:spell_check = 0
+ setlocal spell spelllang=
+ endif
+endfunction
+
+
+" Save using sudo
+function SudoWriteFunction()
+ :w !sudo tee %
+ :e!
+endfunction
+
+" Toggle paste mode
+function PasteToggle()
+ if &paste
+ set nopaste
+ echo "Paste mode disabled"
+ else
+ set paste
+ echo "Paste mode enabled"
+ endif
endfunction
-map <F8> :call <SID>spell()<CR>
-imap <F8> <C-o>:call <SID>spell()<CR>