vimrc

"Invoke pathogen for plugins"
runtime bundle/vim-pathogen/autoload/pathogen.vim
execute pathogen#infect()

"Line numbers"
set number
"Tell me the name of the file I'm editing"
set title
"A tab is equivalent to 4 spaces"
set tabstop=4
"Shift by 4 spaces when I press tab"
set shiftwidth=4
"Do C-style indentation automatically"
set cindent
"Make backspace work like in most other apps"
set backspace=indent,eol,start
"Highlight search results"
set hlsearch
"Ignore case while searching..."
set ignorecase
"...but only ignore if the search string is all lowercase"
set smartcase
"Set encoding to utf-8"
set encoding=utf-8
"Enable characters to demarcate the kind of whitespace used"
set listchars=extends:»,precedes:«,tab:·\ ,trail:◀
set list
" Set the separator character for separating vertical windows
set fillchars+=vert:│
"Use 16 colours in the terminal"
set t_Co=16
"Use fancy symbols in powerline"
let g:Powerline_symbols = "fancy"
"Ignore some file endings while expanding"
set wildignore=*.o,*~,*.pyc,.git
"New windows appear to the right of or below the existing window"
set splitright
set splitbelow
"Set timeout values for mappings and keycodes"
set timeoutlen=500
set ttimeoutlen=100
"Set foldmethod to fold all lines of the same or higher indent level..."
set foldmethod=indent
"... but keep it turned off at startup"
set foldlevelstart=99
"Set modeline, particularly for syntax-highlighting certain files correctly"
set modeline
"Treat all sh files as bash scripts for syntax highlighting"
let g:is_bash = 1
"Treat all tex files as latex files"
let g:tex_flavor = "latex"
"Enable Powerline (assumes powerline has been installed using"
"     pip3 install --user powerline-status"
set rtp+=$HOME/.local/lib/python3.10/site-packages/powerline/bindings/vim
"Always show statusline"
set laststatus=2
"First run `$ uv tool install ruff@latest` in a shell
"Also make sure you have "the ALE plugin
let g:ale_linters = { "python": ["ruff"] }
let g:ale_fixers = { "python": ["ruff", "ruff_format"] }
"Set options for vim-slime
let g:slime_target = "tmux"
let g:slime_python_ipython = 1
"Change leader for vimtex insert mode mappings from '`' to '#'"
let g:vimtex_imaps_leader = "#"
"Set tagbar position
let g:tagbar_position = 'leftabove vertical'
let g:tagbar_indent = 1
"Force xterm-256color so vim recognizes Ctrl+Arrow, Shift+Arrow, etc.
"Needed inside tmux/screen because vim 8.2 doesn't fully understand the
"tmux-256color terminal type. Safe because tmux is xterm-compatible for
"key sequences.
set term=xterm-256color

"Switch on syntax highlighting"
syntax on
colorscheme vader
"Detect filetype automatically and indent depending upon filetype"
filetype plugin indent on

": is too painful to press"
nnoremap <Space> :
vnoremap <Space> :

"To give backspace a more useful purpose"
nnoremap <silent> <Backspace> i<Backspace><C-o>:stopinsert<CR>

"For copying and pasting text through the system clipboard"
noremap <Leader>y "+y
noremap <Leader>p "+p
noremap <Leader>P "+P

"For moving up and down through wrapped lines"
nnoremap <silent> k gk
nnoremap <silent> j gj
nnoremap <silent> <Up> gk
nnoremap <silent> <Down> gj
vnoremap <silent> k gk
vnoremap <silent> j gj
vnoremap <silent> <Up> gk
vnoremap <silent> <Down> gj
inoremap <silent> <C-o>k <C-o>gk
inoremap <silent> <C-o>j <C-o>gj
inoremap <silent> <Up> <C-o>gk
inoremap <silent> <Down> <C-o>gj

"Make Ctrl+Left and Ctrl+Right move through words"
nnoremap <silent> <C-Left> b
nnoremap <silent> <C-Right> w
"For moving to the end of a word, backwards
nnoremap <silent> E ge

"Make H and L act like Home and End"
nnoremap H ^
nnoremap L $

"For swapping parameters in a comma-separated list with Alt + Left or Right"
"Note: We use nmap and imap because we *want* the redefined versions"
nmap <silent> <M-Left> <,
nmap <silent> <M-Right> >,
imap <silent> <M-Left> <C-o><,
imap <silent> <M-Right> <C-o>>,

"For jumping to the last position when reopening a file
if has("autocmd")
	au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif
endif

"For when you forget to open a file with sudo"
noremap <Leader>ww :w !sudo tee % >/dev/null<CR>

"For toggling the NERDTree window on and off"
map <Leader>] :NERDTreeMirror<CR>:NERDTreeToggle<CR>
" Start NERDTree and put the cursor back in the other window.
"autocmd VimEnter * NERDTree | wincmd p
" Open the existing NERDTree on each new tab.
autocmd BufWinEnter * if &buftype != 'quickfix' && getcmdwintype() == '' | silent NERDTreeMirror | endif
" Close the tab if NERDTree is the only window remaining in it.
"autocmd BufEnter * if winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree() | call feedkeys(":quit\<CR>:\<BS>") | endif

"For toggling the Gundo window on and off"
map <silent> <Leader>[ :GundoToggle<CR>

"For toggling the git gutter on and off"
nnoremap <silent> <Leader>gg :GitGutterToggle<CR>

"For toggling the tagbar window on and off"
map <silent> <Leader><CR> :TagbarToggle<CR>
"Search for the tags file recursing outwards until you hit root (/)"
set tags=tags;/

"For opening a new file quickly in a new tab from normal mode"
nmap t :tabe 

"For un-highlighting after a search is done"
nnoremap <silent> <C-l> :nohlsearch<CR><C-l>

"For centering the screen on the search-find"
nnoremap n nzz
nnoremap N Nzz

"For keeping the selection on after indenting/un-indenting in visual mode"
vnoremap <silent> > >gv
vnoremap <silent> < <gv

"For moving tabs left and right"
"Use Alt+PgUp for left and Alt+PgDn for right"
nnoremap <silent> [5;3~
			\ :execute 'silent! tabmove ' . (tabpagenr()-2)<CR>
nnoremap <silent> [6;3~
			\ :execute 'silent! tabmove ' . tabpagenr()<CR>
inoremap <silent> [5;3~
			\ <ESC>:execute 'silent! tabmove ' . (tabpagenr()-2)<CR>a
inoremap <silent> [6;3~
			\ <ESC>:execute 'silent! tabmove ' . tabpagenr()<CR>a

"For converting long constants into upper case quickly (after typing them)"
inoremap <C-u> <Esc>viwUea

"For clearing a line without deleting it in normal mode"
"- The escape helps exit visual mode when the line is already empty"
nnoremap dl 0v$hx<Esc>

"For attaching an indented line to the end of the previous line (with a space)"
nnoremap d<Backspace> ^d0i<Backspace> <Esc>

"For opening vimrc quickly"
nnoremap <Leader>ev :vsplit $MYVIMRC<CR>
"For loading vimrc changes quickly"
nmap <Leader>sv :source $MYVIMRC<CR><C-l>

"For preventing an incomplete comment from deleting text"
nnoremap <Leader>c <Nop>
vnoremap <Leader>c <Nop>

"For moving up and down faster, but not as fast as PgUp and PgDn"
nmap <C-k> 3k
nmap <C-j> 3j
vmap <C-k> 3k
vmap <C-j> 3j
nmap <C-Up> 3k
nmap <C-Down> 3j
imap <C-Up> <C-o>3k
imap <C-Down> <C-o>3j
vmap <C-Up> 3k
vmap <C-Down> 3j

"For moving the screen, but not the cursor..."
nnoremap <S-Up> <C-y>
nnoremap <S-Down> <C-e>
vnoremap <S-Up> <C-y>
vnoremap <S-Down> <C-e>
inoremap <S-Up> <C-o><C-y>
inoremap <S-Down> <C-o><C-e>

"For there are things faster than <C-w>w"
nnoremap <C-w><C-Left>  <C-w><Left>
nnoremap <C-w><C-Right> <C-w><Right>
nnoremap <C-w><C-Up>    <C-w><Up>
nnoremap <C-w><C-Down>  <C-w><Down>

"For disabling accidental Ctrl-Home and Ctrl-End presses"
nnoremap <C-End> <Nop>
nnoremap <C-Home> <Nop>
inoremap <C-End> <Nop>
inoremap <C-Home> <Nop>
vnoremap <C-End> <Nop>
vnoremap <C-Home> <Nop>

"For switching paste mode on/off during insert"
"Otherwise, indents will cascade"
set pastetoggle=<F4>

"For figuring out the highlight group under the cursor"
map <Leader>h
			\ :echo
			\ "hi<" . synIDattr(synID(line("."),col("."),1),"name") . "> " .
			\ "trans<" . synIDattr(synID(line("."),col("."),0),"name") . "> " .
			\ "lo<" . synIDattr(synIDtrans(synID(line("."),col("."),1)),"name")
			\       . ">"
			\ <CR>

"For autoformatting a C/C++ file using astyle"
nnoremap <silent> <Leader>fc
			\ :%!astyle --mode=c --style=k/r --indent=tab --pad-oper
			\           --unpad-paren --delete-empty-lines --align-pointer=name
			\           --break-blocks<CR>
"For autoformatting a python file using autopep8"
nnoremap <silent> <Leader>fy :%!autopep8 -<CR>

"For autoformatting a file using par with a width of 79 characters"
set formatprg="par 100"
"For formatting the whole document"
nnoremap <Leader>fa ggVGgq
"For formatting the current paragraph"
nnoremap <Leader>fp mzvapgq`z

"For removing trailing spaces"
nnoremap <silent> <Leader>fs :%s/\s\+$//g<CR>

"For spellcheck"
nnoremap <silent> <Leader>ss
			\ :setlocal spell spelllang=en_us<CR>
nnoremap <silent> <Leader>sa
			\ :setlocal nospell<CR>

"For exceeding 80 characters in a line"
if exists('+colorcolumn')
	set colorcolumn=100
else
	au BufWinEnter * let w:m2=matchadd('ColorColumn', '\%>80v.\+', -1)
endif

"For adding file templates from .vim/templates"
au BufNewFile * :silent! exec ":0r ".$HOME."/.vim/templates/template.".&ft.
			\ " | :normal Gdd$"

"Creating an autocommand group to ensure this runs after loading plugins and"
"loading the colorscheme"
augroup CustomHighlights
	autocmd!

	"For setting the search match colour appropriately"
	autocmd colorscheme,VimEnter * highlight Search ctermbg=011 ctermfg=000

	"For inverting colours on selection"
	autocmd colorscheme,VimEnter * highlight clear Visual
	autocmd colorscheme,VimEnter * highlight Visual cterm=reverse

	"For setting the git gutter colors properly"
	autocmd colorscheme,VimEnter * highlight clear SignColumn
	autocmd colorscheme,VimEnter * highlight GitGutterAdd ctermfg=2 ctermbg=0
	autocmd colorscheme,VimEnter * highlight GitGutterChange ctermfg=3 ctermbg=0
	autocmd colorscheme,VimEnter * highlight GitGutterDelete ctermfg=1 ctermbg=0
	autocmd colorscheme,VimEnter * highlight GitGutterChangeDelete ctermfg=3 ctermbg=0

	autocmd colorscheme,VimEnter * highlight ALEWarning cterm=italic ctermbg=235
augroup END

"LaTeX shortcuts"
nnoremap <silent> <Leader>le i\begin{enumerate}
\end{enumerate}O\item 
nnoremap <silent> <Leader>li i\begin{itemize}
\end{itemize}O\item 
nnoremap <silent> <Leader>lin i\begin{itemize}[nosep]
\end{itemize}O\item 
nnoremap <silent> <Leader>li- i\begin{itemize}[label=--]
\end{itemize}O\item 
nnoremap <silent> <Leader>li-n i\begin{itemize}[label=--,nosep]
\end{itemize}O\item 
nnoremap <silent> <Leader>lq i\begin{equation}
\end{equation}O
nnoremap <silent> <Leader>l8q i\begin{equation*}
\end{equation*}O
nnoremap <silent> <Leader>la i\begin{align}
\end{align}O
nnoremap <silent> <Leader>l8a i\begin{align*}
\end{align*}O
nnoremap <silent> <Leader>ls viw<ESC>`>a}<ESC>hviw<ESC>`<i\emph{<ESC>
vnoremap <silent> <Leader>ls <ESC>`<i\emph{<ESC>`>6la}<ESC>
nnoremap <silent> <Leader>lb viw<ESC>`>a}<ESC>hviw<ESC>`<i\textbf{<ESC>
vnoremap <silent> <Leader>lb <ESC>`<i\textbf{<ESC>`>8la}<ESC>
"Format Google Scholar citations"
vmap <silent> <Leader>fc :s/^  /\t/g<CR>gv:s/=/ = /g<CR>gv:s/[{}]/"/g<CR><C-l>
nmap <silent> <Leader>lt ^f{lgUl/\d<CR>4lgUl<C-l>

"Shortcut for nonumber"
nnoremap <Leader>n :set number<CR>
nnoremap <Leader>nn :set nonumber<CR>

" =========================================================================
" Claude Code integration (requires tmux)
" =========================================================================
"Send a code reference to the Claude Code tmux pane and switch focus to it
"Usage: visual-select lines, press \cc
"Sends: @relative/path/to/file:startline-endline
function! SendToClaudeCode()
	let l:file = expand('%:.')
	let l:start = line("'<")
	let l:end = line("'>")
	if l:start == l:end
		let l:ref = '@' . l:file . ':' . l:start
	else
		let l:ref = '@' . l:file . ':' . l:start . '-' . l:end
	endif
	" Send the reference to the Claude Code pane (pane index 2 in dev layout)
	" and shift focus to it
	let l:pane = get(g:, 'claude_code_pane', ':.2')
	call system('tmux send-keys -t ' . shellescape(l:pane) . ' '
				\ . shellescape(l:ref) . ' && tmux select-pane -t '
				\ . shellescape(l:pane))
endfunction

vnoremap <silent> <Leader>cc :<C-u>call SendToClaudeCode()<CR>