macos-vimrc

" ===============================================================================
"                     MAC-ADAPTED & CLEANED VIMRC CONFIGURATION
" ===============================================================================
" NEEDED FOR THIS FILE TO WORK IN MACOS:
" 1. Install dependencies: brew install fzf node
" 2. Install vim-plug: curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
"    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
" 3. Run :PlugInstall within Vim

" ==========================================
" 1. PLUGINS RUNTIME (via vim-plug)
" ==========================================
call plug#begin('~/.vim/plugged')

Plug 'sheerun/vim-polyglot'
Plug 'dense-analysis/ale'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'ludovicchabant/vim-gutentags'
Plug 'preservim/nerdtree'

call plug#end()

" ==========================================
" 2. CORE VIM BEHAVIOR & SECURITY
" ==========================================
set nocompatible
filetype off
filetype plugin indent on
syntax on

set history=500
set modelines=0
set encoding=utf-8
set hidden                  " Allow hidden buffers

" Auto-read outside changes
set autoread
au FocusGained,BufEnter * checktime

" Return to last edit position when opening files
au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g'\"" | endif

" ==========================================
" 3. USER INTERFACE & RENDERING (macOS Adaptive)
" ==========================================
set number                  " Show line numbers
set ruler                   " Show file stats
set cmdheight=1
set foldcolumn=1            " Add extra margin to the left
set ttyfast                 " Fast rendering
set lazyredraw              " Don't redraw while executing macros
set scrolloff=7             " Set 7 lines to the cursor when moving vertically

" Audio/Visual Bells
set noerrorbells
set novisualbell
set t_vb=
set tm=500

" Color Configuration (Dynamic macOS Terminal Inheritance)
set t_Co=256


" 1. Force background transparency so the native terminal theme shows through
autocmd ColorScheme * highlight Normal ctermbg=NONE guibg=NONE
autocmd ColorScheme * highlight NonText ctermbg=NONE guibg=NONE
autocmd ColorScheme * highlight LineNr ctermbg=NONE guibg=NONE
autocmd ColorScheme * highlight SignColumn ctermbg=NONE guibg=NONE

" 2. Dynamic light/dark profile initialization (Registered permanently at boot)

" --- Light Mode Interceptors ---
autocmd ColorScheme * if &background == 'light' | highlight Comment      ctermfg=244 cterm=italic | endif
autocmd ColorScheme * if &background == 'light' | highlight Statement    ctermfg=125 cterm=bold   | endif
autocmd ColorScheme * if &background == 'light' | highlight Type         ctermfg=28  cterm=bold   | endif
autocmd ColorScheme * if &background == 'light' | highlight Constant     ctermfg=22               | endif
autocmd ColorScheme * if &background == 'light' | highlight String       ctermfg=160              | endif
autocmd ColorScheme * if &background == 'light' | highlight PreProc      ctermfg=19  cterm=bold   | endif
autocmd ColorScheme * if &background == 'light' | highlight Function     ctermfg=20               | endif
autocmd ColorScheme * if &background == 'light' | highlight Special      ctermfg=90               | endif
autocmd ColorScheme * if &background == 'light' | highlight Identifier   ctermfg=21               | endif

" --- Dark Mode Interceptors ---
autocmd ColorScheme * if &background == 'dark'  | highlight Comment      ctermfg=247 cterm=italic | endif
autocmd ColorScheme * if &background == 'dark'  | highlight PreProc      ctermfg=51  cterm=bold   | endif
autocmd ColorScheme * if &background == 'dark'  | highlight Function     ctermfg=117 cterm=bold   | endif
autocmd ColorScheme * if &background == 'dark'  | highlight Identifier   ctermfg=85               | endif

" Enable default scheme processing
colorscheme default


" ==========================================
" 4. WHITESPACE, TABS, AND FORMATTING
" ==========================================
set wrap                    " Wrap lines
set textwidth=79
set formatoptions=tcqrn1
set tabstop=2
set shiftwidth=2
set softtabstop=2
set expandtab               " Use spaces instead of tabs
set noshiftround
set ai                      " Auto indent
set si                      " Smart indent

" Visualize tabs and newlines
set listchars=tab:▸\ ,eol:¬
" To enable by default, uncomment: set list

" Delete trailing white space on save automatically
fun! CleanExtraSpaces()
    let save_cursor = getpos(".")
    let old_query = getreg('/')
    silent! %s/\s\+$//e
    call setpos('.', save_cursor)
    call setreg('/', old_query)
endfun

if has("autocmd")
    autocmd BufWritePre *.txt,*.js,*.py,*.wiki,*.sh,*.coffee :call CleanExtraSpaces()
    " Saves markdown files automatically whenever text is changed
    autocmd TextChanged,TextChangedI *.md silent write
endif

" ==========================================
" 5. SEARCHING AND MATCHING
" ==========================================
set hlsearch                " Highlight search results
set incsearch               " Incremental browser-like search
set ignorecase              " Ignore case when searching
set smartcase               " Smart case parsing
set showmatch               " Show matching bracket

set matchpairs+=<:>         " Use % to jump between HTML/XML pairs
runtime! macros/matchit.vim

" ==========================================
" 6. KEYBINDINGS & MAPPINGS
" ==========================================
let mapleader = ","         " Set defined leader key to comma

" Fast saving and Sudo writing for macOS
nmap <leader>w :w!<cr>
command! W execute 'w !sudo tee % > /dev/null' | edit!

" Clear search highlight
map <leader><space> :let @/=''<cr>

" Move up/down visual editor lines instead of physical lines
nnoremap j gj
nnoremap k gk

" Toggle visual tab symbols
map <leader>l :set list!<CR>

" Remap help key to handle fullscreen toggles
inoremap <F1> <ESC>:set invfullscreen<CR>a
nnoremap <F1> :set invfullscreen<CR>
vnoremap <F1> :set invfullscreen<CR>

" Formatting Paragraph
map <leader>q gqip

" FZF Keybindings
nnoremap <C-p> :Files<CR>
nnoremap <Leader>b :Buffers<CR>
nnoremap <Leader>h :History<CR>
nnoremap <Leader>t :BTags<CR>
nnoremap <Leader>T :Tags<CR>

" Tab Navigation Mappings
nnoremap th :tabnext<CR>
nnoremap tl :tabprev<CR>
nnoremap tn :tabnew<CR>
nnoremap td :tabclose<CR>

" Spell Checking Mappings
map <leader>ss :setlocal spell!<cr>
map <leader>sn ]s
map <leader>sp [s
map <leader>sa zg
map <leader>s? z=

" Surround Selection Mappings (Visual Mode)
vnoremap $1 <esc>`>a)<esc>`<i(<esc>
vnoremap $2 <esc>`>a]<esc>`<i[<esc>
vnoremap $3 <esc>`>a}<esc>`<i{<esc>
vnoremap $$ <esc>`>a"<esc>`<i"<esc>
vnoremap $q <esc>`>a'<esc>`<i'<esc>
vnoremap $e <esc>`>a`<esc>`<i`<esc>

" Auto-pair shortcuts (Insert Mode)
inoremap $1 ()<esc>i
inoremap $2 []<esc>i
inoremap $3 {}<esc>i
inoremap $4 {<esc>o}<esc>O
inoremap $q ''<esc>i
inoremap $e ""<esc>i
" ==========================================
" 7. PLUGIN CONFIGURATIONS (ALE & COC)
" ==========================================
let g:ale_sign_error = '❌'
let g:ale_sign_warning = '⚠️'

" Modernized CoC Tab Completion engine (Fixes E117 Error)
function! CheckBackspace() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1] =~# '\s'
endfunction

inoremap <silent><expr> <TAB>
  \ coc#pum#visible() ? coc#pum#next(1) :
  \ CheckBackspace() ? "\<TAB>" :
  \ coc#refresh()

inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

" CoC Code Navigation bindings
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Highlight symbol under cursor on hold
autocmd CursorHold * silent call CocActionAsync('highlight')

" ==========================================
" 8. HELPER UTILITIES & BUFFER MANAGEMENT
" ==========================================
command! Bclose call <SID>BufcloseCloseIt()
function! <SID>BufcloseCloseIt()
    let l:currentBufNum = bufnr("%")
    let l:alternateBufNum = bufnr("#")
    if buflisted(l:alternateBufNum)
        buffer #
    else
        bnext
    endif
    if bufnr("%") == l:currentBufNum
        new
    endif
    if buflisted(l:currentBufNum)
        execute("bdelete! ".l:currentBufNum)
    endif
endfunction

" AUTOMATIC STARTUP DETECTION: Check macOS System Theme on Boot
if has("macunix")
    let s:macos_theme = system('defaults read -g AppleInterfaceStyle 2>/dev/null | tr -d "\n "')

    if s:macos_theme ==# 'Dark'
        set background=dark
    else
        set background=light
    endif
else
    echom "DEBUG: Failed macunix condition entirely!"
endif
" ===============================================================================
" FORCEFUL C FUNCTION OVERRIDE (Place at the very bottom of your .vimrc)
" ===============================================================================
function! FixCFunctions()
    if &background == 'dark'
        highlight Function     ctermfg=117 cterm=bold    " Bright sky blue
        highlight cFunction    ctermfg=117 cterm=bold
        highlight cCustomFunc  ctermfg=117 cterm=bold    " Catch-all for polyglot/treesitter
    else
        highlight Function     ctermfg=20  cterm=none    " Midnight blue for light mode
        highlight cFunction    ctermfg=20  cterm=none
        highlight cCustomFunc  ctermfg=20  cterm=none
    endif
endfunction

augroup FixSyntaxColors
    autocmd!
    " Fire whenever a file's syntax engine finishes initialization
    autocmd Syntax c,cpp call FixCFunctions()
    " Fire when live-toggling the background option profile
    autocmd OptionSet background call FixCFunctions()
augroup END