dot_vimrc

"""
" Vim configuration.
" Updated 2023-12-12.
"
" Refer to my cheat sheet for usage details:
" https://steinbaugh.com/posts/vim.html
"""

" Notes {{{1
" ==============================================================================
"
" Consider moving useful notes documented here to the main Vim cheatsheet.
"
" Vim package manager {{{2
" ------------------------------------------------------------------------------
"
" Create a folder named 'pack' inside your '.vim' configuration folder. Direct
" subfolders of 'pack' can be used to organize packages/plugins into
" collections.
"
" Put plugins that should be loaded at startup into:
"   .vim/pack/<collection>/start/<plugin>
"
" Put plugins that should be added on demand with ':packadd' into:
"   .vim/pack/<collection>/opt/<plugin>
"
" See also:
" - https://shapeshed.com/vim-packages/
" - https://hackingcpp.com/dev/vim_plugins.html
"
" Runtimepath {{{2
" ------------------------------------------------------------------------------
"
" Check runtimepath (rtp) configuration with ':set runtimepath?' or
" ':echo $VIMRUNTIME'.
"
" Neovim-specific commands {{{2
" ------------------------------------------------------------------------------
" - ':vs|:te': Vertically split a terminal (like ':vert term' in Vim).
"   https://github.com/neovim/neovim/issues/3192
"
" Language server protocol (LSP) support and plugins {{{2
" ------------------------------------------------------------------------------
"
" For additional LSP configuration, consider adding support for
" mason.nvim or nvim-cmp:
" - https://github.com/hrsh7th/nvim-cmp
" - https://github.com/williamboman/mason.nvim

" Pre-flight checks {{{1
" ==============================================================================

let g:is_nvim=has('nvim')
let g:is_vim8=v:version >= 800 ? 1 : 0

" Check that Vim version matches minimum requirement.
if g:is_vim8 && !g:is_nvim && v:version < 801
    :echom "ERROR: Vim 8.1+ is required for '~/.vimrc' config."
    finish
endif

" Check that Neovim version matches minimum requirement.
if g:is_nvim && !has('nvim-0.6')
    :echom "ERROR: nvim 0.6+ is required for '~/.vimrc' config."
    finish
endif

" Disable vi compatibility mode.
set nocompatible

" Having longer updatetime (default is 4000 ms = 4s) leads to noticeable delays
" and poor user experience.
set updatetime=300

" Global variables {{{1
" ==============================================================================

" Refer to ':help expand' for details.
" Here '<sfile>' refers to sourced script file name, i.e. '~/.vimrc'.
let g:user_home=expand('<sfile>:p:h')
let g:vim_home=join([g:user_home, '.vim'], '/')

let g:plugins_home=join([g:vim_home, 'pack', 'dist', 'start'], '/')
let g:themes_home=join([g:vim_home, 'pack', 'theme', 'start'], '/')
let g:vim_plug_home=join([g:vim_home, 'plugged'], '/')

let g:koopa_color_mode=$KOOPA_COLOR_MODE
let g:koopa_prefix=$KOOPA_PREFIX

" > let g:arch=substitute(system('uname -m'), '\n', '', '')

" Highlighting {{{1
" ==============================================================================

" Enable syntax highlighting.
syntax on

" Note that 'colorscheme' definition (e.g. dracula) can clear all user-defined
" highlight groups. Use ':autocmd ColorScheme' before 'colorscheme' command to
" ensure that the highlight group gets created and is not cleared by future
" 'colorscheme' commands. See ':help :colorscheme' for details.

" Highlight TODO or FIXME comments.
" > highlight Todos cterm=bold ctermbg=red ctermfg=white gui=bold guibg=red \
" >     guifg=white
" > :autocmd ColorScheme * highlight Todos cterm=bold ctermbg=red \
" >     ctermfg=white gui=bold guibg=red guifg=white
" > :match Todos /\(TODO\|FIXME\)/

" See also:
" - https://vim.fandom.com/wiki/Highlight_unwanted_spaces
" - https://github.com/nasamuffin/dotfiles/blob/master/vimrc

" Key mppings (bindings) {{{1
" ==============================================================================

" Refer to ':help localleader' for details.
let mapleader=','
let maplocalleader="\\"

" Fix backspace key to work as expected.
" https://unix.stackexchange.com/a/307974
set backspace=indent,eol,start

" Normal mode {{{2
" ------------------------------------------------------------------------------

" 'w!' still failed? Try 'w!!' to write as root.
cmap w!! w !sudo tee >/dev/null %

" Edit my vimrc file.
nnoremap <leader>ev :vsplit $MYVIMRC<cr>

" Source my vimrc file.
nnoremap <leader>sv :source $MYVIMRC<cr>

" Add blank line without entering insert mode.
nnoremap <enter> o<esc>
" > nnoremap <s-enter> O<esc>

" Enable code fold toggling with the spacebar.
nnoremap <space> za

" Delete line without copying to clipboard, using leader prefix mapping.
" https://stackoverflow.com/a/11993928/3911732
nnoremap <leader>d "_dd

" Split navigation keys:
"
" - Ctrl+J move to the split below
" - Ctrl+K move to the split above
" - Ctrl+L move to the split to the right
" - Ctrl+H move to the split to the left
"
" In other words, press Ctrl plus the standard VIM movement key to move to a
" specific pane.

nnoremap <c-j> <c-w><c-j>
nnoremap <c-k> <c-w><c-k>
nnoremap <c-l> <c-w><c-l>
nnoremap <c-h> <c-w><c-h>

" Surround current word in single quotes.
nnoremap <leader>' viw<esc>a'<esc>bi'<esc>lel

" Surround current word in double quotes.
nnoremap <leader>" viw<esc>a"<esc>bi"<esc>lel

" Insert mode {{{2
" ------------------------------------------------------------------------------

" Escape from insert mode without stretching to hit Esc key.
inoremap jk <esc>

" Delete line in insert mode using Ctrl+d.
inoremap <c-d> <esc>ddi

" Visual mode {{{2
" ------------------------------------------------------------------------------

" Delete, paste, and yank more intuitively.
" https://superuser.com/questions/321547/

" > vnoremap P "0P
" > vnoremap d "0d
" > vnoremap p "0p
" > vnoremap y "0y

" Muscle memory {{{2
" ------------------------------------------------------------------------------

" Enforce muscle memory of HJKL instead of arrow keys.
" It's better practice to escape back to normal mode and navigate there.
" Note that this will break trackpad and can do weird things on macOS.
" > noremap <up> <nop>
" > noremap <down> <nop>
" > noremap <left> <nop>
" > noremap <right> <nop>

" Enforce muscle memory of JK exit instead of Esc.
" > inoremap <esc> <nop>

" Mapping Esc to Caps Lock is a good ergonomic alternative.
" On macOS: System Preferences > Keyboard > Modifier Keys...
" Change Caps Lock Key to Escape.
" Note that Esc will continue to work with this setup.

" Text formatting {{{1
" ==============================================================================

" Always enforce UTF-8.
set encoding=utf-8

" Wrapping and margins {{{2
" ------------------------------------------------------------------------------

" Enable soft wrapping.
" Use nowrap to disable.
set wrap

" Enable hard line wrapping width.
" Can be generally annoying.
" Consider enabling for specific file types instead.
" > set textwidth=80

" Disable automatic line breaks.
" https://stackoverflow.com/questions/2280030
set textwidth=0
set wrapmargin=0

" Set the right margin color column.
" https://stackoverflow.com/questions/2182427
"
" Can define relative to 'textwidth' (hard wrapping) with:
" > set colorcolumn=+1
"
" For 80c width, use 80 + 1.
set colorcolumn=81

" Always show the signcolumn, otherwise it would shift the text each time
" diagnostics appear/become resolved.
set signcolumn=yes

" Spaces and tabs {{{2
" ------------------------------------------------------------------------------

" Smart tab mode.
set smarttab

" Expand (detab) tab to spaces.
" This can be annoying when working with TSV files.
set expandtab

" When indenting with '>', shift as 4 spaces.
set shiftwidth=4

" Tab columns will display as 4 spaces.
set softtabstop=4

" Display tab (\t) visually as 4 spaces.
" Can also set using 'ts' instead of 'tabstop'.
set tabstop=4

" Entab files.
" This is often useful for git configuration files.
" https://stackoverflow.com/questions/9104706
" > :set noexpandtab tabstop=4 shiftwidth=4
" > :%retab!

" Detab files.
" https://stackoverflow.com/a/323014/3911732
" > :set expandtab tabstop=4 shiftwidth=4
" > :%retab

" Whitespace {{{2
" ------------------------------------------------------------------------------

" Enable file-type-specific indentation.
if has('autocmd')
    filetype on
    filetype indent on
    filetype plugin on
endif

" Whitespace indicators.
if has('multi_byte')
    set list listchars=tab:»·,trail:·
else
    set list listchars=tab:>-,trail:.
endif

" Navigation {{{1
" ==============================================================================

" Mouse integration {{{2
" ------------------------------------------------------------------------------

" Enable mouse integration that attempts to play nicely with tmux.
" 'a' means 'all' here.
set mouse=a
if !g:is_nvim
    " Don't set to 'xterm2' here, very buggy.
    " https://unix.stackexchange.com/questions/50733/
    " https://github.com/microsoft/terminal/issues/5454
    set ttymouse=sgr
endif

" Window management {{{2
" ------------------------------------------------------------------------------

set splitbelow
set splitright

" Interface elements {{{2
" ------------------------------------------------------------------------------

" Highlight current line.
set cursorline

" Show command in bottom bar.
set showcmd

" Always show status line.
" Disable with '0'.
set laststatus=2

" Always show ruler at bottom.
set ruler

" Command mode menus.
set wildmenu
set wildmode=list:longest,full

" Line numbers {{{2
" ------------------------------------------------------------------------------

" Enable line numbers.
set number

" Disable line numbers.
" Using this currently because it's easier to paste on Windows with tmux.
" > set nonumber

" Search (matching) {{{2
" ------------------------------------------------------------------------------

set hlsearch
set ignorecase
set incsearch
set showmatch
set smartcase

" Use regular expression matching by default.
" https://github.com/nasamuffin/dotfiles/blob/master/vimrc
" > :nnoremap / /\v
" > :cnoremap %s/ %s/\v
" > :cnoremap s/ s/\v
" > :xnoremap '<,'>s/ '<,'>s/\v
" > :xnoremap / /\v
" > :xnoremap s/ s/\v

" Folding {{{2
" ------------------------------------------------------------------------------

" foldmethod alternatives: indent, syntax
set foldmethod=marker

" Disable collapsed folds by default.
" Restore folds with 'zc'.
" https://stackoverflow.com/questions/8316139
" Restore folds with 'zc'.
set foldlevelstart=99
set nofoldenable

" File management {{{1
" ==============================================================================

" Disable creation of 'foo~' files.
" These are annoying and create file system cruft.
set nobackup
" > set nowritebackup

" Disable the swap file, if desired.
" This also creates FS cruft but is useful for recovery.
" > set noswapfile

" vim-galore tips {{{1
" ==============================================================================

" Some fantastic usability vips from the 'vim-galore' guide.
" Refer to https://github.com/mhinz/vim-galore for details.

" Disable audible and visual bells {{{2
" ------------------------------------------------------------------------------

" This is often annoying when scrolling inside a document using mouse or
" trackpad input instead of the keyboard.

set noerrorbells
set novisualbell
set t_vb=

" Don't lose selection when shifting sidewards {{{2
" ------------------------------------------------------------------------------

" If you select one or more lines, you can use `<` and `>` for shifting them
" sidewards. Unfortunately you immediately lose the selection afterwards.
"
" You can use `gv` to reselect the last selection (see `:h gv`), thus you can
" work around it like this:

xnoremap <  <gv
xnoremap >  >gv

" Now you can use `>>>>>` on your visual selection without any problems.
" The same can be achieved using `.`, which repeats the last change.

" Quickly move current line {{{2
" ------------------------------------------------------------------------------

" These mappings also take a count, so 2]e moves the current line 2 lines below.

nnoremap [e  :<c-u>execute 'move -1-'. v:count1<cr>
nnoremap ]e  :<c-u>execute 'move +'. v:count1<cr>

" Quickly add empty lines {{{2
" ------------------------------------------------------------------------------

" Now 5[<space> inserts 5 blank lines above the current line.

nnoremap [<space>  :<c-u>put! =repeat(nr2char(10), v:count1)<cr>'[
nnoremap ]<space>  :<c-u>put =repeat(nr2char(10), v:count1)<cr>

" Saner behavior of n and N {{{2
" ------------------------------------------------------------------------------

" The direction of n and N depends on whether / or ? was used for searching
" forward or backward respectively. This is pretty confusing to me.
"
" If you want n to always search forward and N backward, use this:

nnoremap <expr> n  'Nn'[v:searchforward]
xnoremap <expr> n  'Nn'[v:searchforward]
onoremap <expr> n  'Nn'[v:searchforward]

nnoremap <expr> N  'nN'[v:searchforward]
xnoremap <expr> N  'nN'[v:searchforward]
onoremap <expr> N  'nN'[v:searchforward]

" Cursor style {{{2
" ------------------------------------------------------------------------------

" This simply tells Vim to print a certain sequence of characters (escape
" sequence) when entering/leaving insert mode. The underlying terminal, or
" programs like tmux that sit between Vim and the terminal, will process and
" evaluate it.
"
" There's one drawback though: there are many terminal emulator
" implementations and not all use the same sequences for doing the same things.
" The sequences used above might not work with your implementation. Your
" implementation might not even support different cursor styles.
"
" Cursor options (replace the number after '\e['):
"
" - 0: blinking block.
" - 1: blinking block.
" - 2: steady block.
" - 3: blinking underline.
" - 4: steady underline.
" - 5: blinking bar.
" - 6: steady bar.
"
" See also:
" - https://nickjanetakis.com/blog/change-your-vim-cursor-from-a-block-to-
"     line-in-normal-and-insert-mode
" - https://stackoverflow.com/questions/6488683/

if !has('gui_running') && has('macunix') && !g:is_nvim
    let &t_EI = "\e[2 q"
    let &t_SI = "\e[6 q"
    let &t_SR = "\e[4 q"
    " Legacy approach that handles tmux:
    " > if empty($TMUX)
    " >     let &t_SI="\<Esc>]50;CursorShape=1\x7"
    " >     let &t_EI="\<Esc>]50;CursorShape=0\x7"
    " >     let &t_SR="\<Esc>]50;CursorShape=2\x7"
    " > else
    " >     let &t_SI="\<Esc>Ptmux;\<Esc>\<Esc>]50;CursorShape=1\x7\<Esc>\\"
    " >     let &t_EI="\<Esc>Ptmux;\<Esc>\<Esc>]50;CursorShape=0\x7\<Esc>\\"
    " >     let &t_SR="\<Esc>Ptmux;\<Esc>\<Esc>]50;CursorShape=2\x7\<Esc>\\"
    " > endif
endif

" Smarter cursorline {{{2
" ------------------------------------------------------------------------------

" I love the cursorline, but I only want to use it in the current window and not
" when being in insert mode:

autocmd InsertLeave,WinEnter * set cursorline
autocmd InsertEnter,WinLeave * set nocursorline

" Terminal {{{1
" ==============================================================================

" Automatically enter insert mode for terminal shells.
" Also need to disable line numbers by default on Neovim.
"
" See also:
" - :help :terminal
" - https://vi.stackexchange.com/questions/3670/
"     how-to-enter-insert-mode-when-entering-neovim-terminal-pane
" - https://www.reddit.com/r/neovim/comments/akcp97/
"     how_to_automatically_enter_insert_mode_on_opening/
" - https://stackoverflow.com/questions/63906439/
"     how-to-disable-line-numbers-in-neovim-terminal
" - https://vi.stackexchange.com/questions/22307/
"     neovim-go-into-insert-mode-when-clicking-in-a-terminal-in-a-pane
if g:is_nvim
    autocmd TermOpen * setlocal nonumber norelativenumber
    autocmd TermOpen * startinsert
    augroup terminal_setup | au!
        autocmd TermOpen * nnoremap <buffer><LeftRelease> <LeftRelease>i
    augroup end
endif

" Clipboard / pasteboard {{{1
" ==============================================================================

" Enable copy to clipboard (for macOS).
"
" Note that this won't work for PuTTY on Windows. Instead, hold down SHIFT
" and then you can highlight with the mouse. Yank doesn't integrate well
" with the Windows clipboard unless you use X11 forwarding.
"
" See also:
" - https://stackoverflow.com/questions/677986
" - https://stackoverflow.com/a/4313348
" - https://vi.stackexchange.com/questions/14486/

if has('macunix')
    set clipboard=unnamed
    if g:is_nvim
        set clipboard+=unnamedplus
    endif
endif

" Plugins {{{1
" ==============================================================================

" Plugins declared here are managed by vim-plug.
" https://github.com/junegunn/vim-plug
"
" Useful commands:
" - ':PlugInstall' to install plugins.
" - ':PlugUpdate' to update plugins.
"
" Consider including:
" - 'chrisbra/csv.vim'
" - 'github/copilot.vim'
" - 'tpope/vim-rails'
" - 'vim-ruby/vim-ruby'
"
" Additional useful color schemes:
" > Plug 'altercation/vim-colors-solarized'
" > Plug 'overcache/NeoSolarized'  " better truecolor support?

" This must be defined before markdown plugin is loaded.
let g:pandoc#filetypes#pandoc_markdown = 0

call plug#begin(vim_plug_home)

" tabular must be installed before vim-markdown.
Plug 'godlygeek/tabular'

Plug 'airblade/vim-gitgutter'
Plug 'dense-analysis/ale'
Plug 'editorconfig/editorconfig-vim'
Plug 'jlanzarotta/bufexplorer'
Plug 'junegunn/fzf.vim'
Plug 'junegunn/rainbow_parentheses.vim'
Plug 'mhinz/vim-grepper'
Plug 'mhinz/vim-signify'
Plug 'nanotee/zoxide.vim'
Plug 'preservim/nerdtree'
Plug 'preservim/vim-markdown'
Plug 'psf/black'
Plug 'quarto-dev/quarto-vim'
Plug 'rust-lang/rust.vim'
Plug 'tpope/vim-commentary'
Plug 'tpope/vim-fugitive'
Plug 'tpope/vim-sensible'
Plug 'tpope/vim-surround'
Plug 'vim-airline/vim-airline'
Plug 'vim-pandoc/vim-markdownfootnotes'
Plug 'vim-pandoc/vim-pandoc'
Plug 'vim-pandoc/vim-pandoc-syntax'
Plug 'vim-pandoc/vim-rmarkdown'

if g:is_nvim && has('macunix')
    if executable('R')
        Plug 'jalvesaq/Nvim-R'
    endif
endif

" Automatic dark/light switching on macOS.
" Consider replacing this with:
" https://github.com/f-person/auto-dark-mode.nvim
if has('gui_running') && has('macunix')
    Plug 'L-TChen/auto-dark-mode.vim'
endif

" Color scheme plugins.
if g:koopa_color_mode == 'light' || (has('gui_running') && has('macunix'))
    Plug 'rakr/vim-one'
    Plug 'vim-airline/vim-airline-themes'
    " Iceberg defines a Nord-like light theme, but the cursor is currently too
    " hard to see in NORMAL mode.
    " > Plug 'cocopon/iceberg.vim',
    " > Plug 'lifepillar/vim-solarized8',
    " > Plug 'vim-airline/vim-airline-themes',
else
    if !isdirectory(join([themes_home, 'dracula_pro'], '/'))
        Plug 'dracula/vim', { 'as': 'dracula' }
    endif
    " > Plug 'nordtheme/vim'
endif

call plug#end()

" Automatically install missing plugins on startup.
" https://github.com/junegunn/vim-plug/wiki/
"     extra#automatically-install-missing-plugins-on-startup
autocmd VimEnter *
    \  if len(filter(values(g:plugs), '!isdirectory(v:val.dir)'))
    \|   PlugInstall --sync | q
    \| endif

" ALE {{{2
" ------------------------------------------------------------------------------

" Configuration details:
" - https://github.com/dense-analysis/ale
" - https://github.com/dense-analysis/ale/blob/master/doc/ale-python.txt
" - https://github.com/dense-analysis/ale/blob/master/ale_linters/
"     python/ruff.vim

" > :ALEInfo
" > :ALEFix
" > :ALEFixSuggest

" > let g:ale_completion_enabled = 1
" > let g:ale_disable_lsp = 1
" > let g:ale_linters_explicit = 1
" > let g:ale_use_neovim_diagnostics_api = 1
" > let g:ale_warn_about_trailing_whitespace = 0

let g:ale_fix_on_save = 1
let g:ale_fixers = {
    \ '*': ['remove_trailing_lines', 'trim_whitespace'],
    \ 'python': ['ruff'],
    \ }
let g:ale_linters = {
    \ 'python': ['ruff'],
    \ 'r': ['languageserver'],
    \ }
let g:ale_python_black_options='--line-length=80'
" > let g:ale_python_ruff_options='--ignore F401'
let g:ale_python_ruff_format_options='--line-length=80'

" NERDTree {{{2
" ------------------------------------------------------------------------------

" Consider using nerdtree-git-plugin.
" https://github.com/Xuyuanp/nerdtree-git-plugin

" Map a specific key or shortcut to open NERDTree.
map <C-n> :NERDTreeToggle<CR>

" Always open a NERDTree automatically at startup.
" > autocmd vimenter * NERDTree

" Open a NERDTree automatically when vim starts up if no files were specified.
" > autocmd StdinReadPre * let s:std_in=1
" > autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif

" Open NERDTree automatically when vim starts up on opening a directory.
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter *
    \ if argc() == 1 && isdirectory(argv()[0]) && !exists('s:std_in')
    \ | exe 'NERDTree' argv()[0]
    \ | wincmd p
    \ | ene |
    \ exe 'cd '.argv()[0]
    \ | endif

" Close vim if the only window left open is a NERDTree.
autocmd bufenter *
    \ if (winnr('$') == 1 && exists('b:NERDTree') && b:NERDTree.isTabTree())
    \ | q | endif

let g:NERDTreeDirArrowCollapsible='▾'
let g:NERDTreeDirArrowExpandable='▸'
let g:NERDTreeMapCloseChildren='-'
let g:NERDTreeMapOpenRecursively='+'
let g:NERDTreeMinimalUI=1
let g:NERDTreeWinSize=24

" Leave 80 chars for editing.
" > let g:NERDTreeWinSize = str2nr(system('expr $COLUMNS - 81'))

" Nvim-R {{{2
" ------------------------------------------------------------------------------

" Documentation details:
" - https://raw.githubusercontent.com/jalvesaq/Nvim-R/master/doc/Nvim-R.txt
" - https://github.com/randy3k/radian

let g:R_app = "radian"
let g:R_args = []
let g:R_assign=0
let g:R_bracketed_paste = 1
let g:R_cmd = "R"
let g:R_hl_term = 0
let g:R_indent_commented=0
let g:R_indent_ess_comments=1
let g:R_min_editor_width=80
let g:R_notmuxconf=1
let g:R_rcomment_string='## '
let g:R_rconsole_height=20
let g:R_rconsole_width=80
let g:R_syntax_folding=1

" SimpylFold {{{2
" ------------------------------------------------------------------------------

" Useful for Python IDE.
" https://github.com/tmhedberg/SimpylFold
" > set foldmethod=indent
" > let g:SimpylFold_docstring_preview=1

" airline {{{2
" ------------------------------------------------------------------------------

" Consider adding tmuxline integration.
" https://github.com/edkolev/tmuxline.vim

" Tab line.
" > let g:airline#extensions#tabline#enabled=1
" > let g:airline#extensions#tabline#formatter='default'
" > let g:airline#extensions#tabline#left_alt_sep='|'
" > let g:airline#extensions#tabline#left_sep=' '

" black {{{2
" ------------------------------------------------------------------------------

" https://black.readthedocs.io/en/stable/integrations/editors.html#vim

" Use our system install from koopa rather than a venv.
let g:black_use_virtualenv=0

" Run black automatically on save.
" > augroup black_on_save
" >     autocmd!
" >     autocmd BufWritePre *.py Black
" > augroup end

" editorconfig-vim {{{2
" ------------------------------------------------------------------------------

" Can debug settings with:
" > let g:EditorConfig_verbose=1
" > :verbose set expandtab? shiftwidth? softtabstop? tabstop?
"
" See also:
" - https://github.com/editorconfig/editorconfig-vim/issues/56
" - https://stackoverflow.com/questions/31295455/
" - https://stackoverflow.com/questions/64051846/

let g:EditorConfig_core_mode='vim_core'

" NOTE If we enable this, need to selectively load the plugin, depending on
" whether 'editorconfig' is installed.
" > let g:EditorConfig_core_mode='external_command'
" > let g:EditorConfig_exec_path='editorconfig'

let g:EditorConfig_exclude_patterns=['fugitive://.*']

" Potentially useful:
" > autocmd FileType gitcommit let b:EditorConfig_disable = 1
" > let g:EditorConfig_disable_rules = ['trim_trailing_whitespace']
" > let g:EditorConfig_core_vimscript_debug = 1

autocmd FileType json setlocal
    \ shiftwidth=2
    \ softtabstop=2

" jedi-vim {{{2
" ------------------------------------------------------------------------------

" This plugin can freak out in an active conda environment.

" > let g:jedi#auto_initialization=0
" > let g:jedi#auto_vim_configuration=1
" > let g:jedi#completions_enabled=0
" > let g:jedi#popup_on_dot=0
" > let g:jedi#popup_select_first=1
" > let g:jedi#show_call_signatures=1
" > let g:jedi#use_splits_not_buffers='left'
" > let g:jedi#use_tabs_not_buffers=1

" fzf {{{2
" ------------------------------------------------------------------------------

" How to update rtp with variable in path:
" - https://vi.stackexchange.com/questions/11601/
" - https://superuser.com/questions/806595/
"
" Check that configuration is enabled with ':Files' command.
"
" See also:
" - https://github.com/junegunn/fzf/blob/master/README-VIM.md
" - https://github.com/junegunn/fzf.vim#commands
" - https://github.com/junegunn/fzf.vim/issues/1102
" - https://www.reddit.com/r/vim/comments/ifegzw/
"     how_do_i_add_fzf_using_vim_8_packages/

let g:fzf_dir = join([g:koopa_prefix, 'opt', 'fzf'], '/')
if isdirectory(g:fzf_dir)
    " The 'set rtp+=' approach only works for a hard-coded path, and does not
    " support variables. For variables, we have to use 'let &rtp' instead. The
    " comma is necessary here to deliniate the directory in the path string.
    let &rtp.=','.g:fzf_dir
    " Ensure we can use ':fzf' and ':Fzf' aliases in addition to ':FZF'.
    cnoreabbrev fzf FZF
    command Fzf FZF
endif

" prettier {{{2
" ------------------------------------------------------------------------------

" Can manually trigger formatting with ':Prettier'.

" > let g:prettier#autoformat_config_files=['.prettierrc']
" > let g:prettier#autoformat_config_present=1
let g:prettier#autoformat=1
let g:prettier#autoformat_require_pragma=0
let g:prettier#config#require_pragma='false'
let g:prettier#config#tab_width=2
let g:prettier#config#use_tabs='false'

" rainbow_parentheses {{{2
" ------------------------------------------------------------------------------

" Activation based on file type
augroup rainbow_lisp
    autocmd!
    autocmd FileType clojure,lisp,r,scheme RainbowParentheses
augroup END

" startify {{{2
" ------------------------------------------------------------------------------

" Disable the plugin, if necessary.
" > let g:startify_disable_at_vimenter=1

let g:startify_custom_header=''

" vim-markdown {{{2
" ------------------------------------------------------------------------------

" Completely disable Markdown-specific code folding.
" > let g:vim_markdown_folding_disabled=1

" Potentially useful:
" > let g:vim_markdown_folding_style_pythonic=1
" > let g:vim_markdown_override_foldtext=0

let g:vim_markdown_folding_level=2

" Add support for ronn files.
autocmd BufNewFile,BufFilePre,BufRead *.ronn set filetype=markdown

" Disable annoying list indentation handling.
" https://github.com/preservim/vim-markdown/issues/126#issuecomment-1430463951
autocmd BufNewFile,BufRead *.md filetype plugin indent off

" vim-pandoc {{{2
" ------------------------------------------------------------------------------

" How to disable formatting of Markdown files:
" - ftdetect/pandoc.vim file
" - https://github.com/vim-pandoc/vim-pandoc/issues/70
" - https://github.com/vim-pandoc/vim-pandoc/issues/382
" - https://www.reddit.com/r/vim/comments/lafqyq/vimpandoc_markdown_conflict/

" NOTE This must come before the plugin activation step.
" > let g:pandoc#filetypes#pandoc_markdown = 0

" vim-pandoc-syntax {{{2
" ------------------------------------------------------------------------------

let g:pandoc#syntax#conceal#blacklist = ['strikeout', 'list', 'quotes']

" Colors (theme) {{{1
" ==============================================================================

" Set Vim-specific sequences for RGB colors.
" https://tomlankhorst.nl/iterm-tmux-vim-true-color/
set termguicolors
let &t_8f="\<Esc>[38;2;%lu;%lu;%lum"
let &t_8b="\<Esc>[48;2;%lu;%lu;%lum"

" Dynamically set dark/light mode, if supported.
" https://apas.gr/2018/11/dark-mode-macos-safari-iterm-vim/
if (has('gui_running') && has('macunix')) || g:koopa_color_mode == 'light'
    set background=light
    if isdirectory(join([vim_plug_home, 'vim-one'], '/'))
        colorscheme one
        let g:airline_theme='one'
    endif
    " > if isdirectory(join([vim_plug_home, 'iceberg.vim'], '/'))
    " >     colorscheme iceberg
    " > endif
    " > if isdirectory(join([vim_plug_home, 'vim-solarized8'], '/'))
    " >     colorscheme solarized8
    " >     let g:airline_theme='solarized'
    " > endif
else
    set background=dark
    if isdirectory(join([themes_home, 'dracula_pro'], '/'))
        packadd! dracula_pro
        colorscheme dracula_pro
    elseif isdirectory(join([vim_plug_home, 'dracula'], '/'))
        colorscheme dracula
    endif
    " > if isdirectory(join([vim_plug_home, 'nord-vim'], '/'))
    " >     colorscheme nord
    " > endif
endif