.vimrc

"" ================ vim-plug ================
" Attempt to install the vim-plug plugin manager.
if empty(glob('~/.vim/autoload/plug.vim'))
	silent !mkdir -p ~/.vim/autoload/ && wget --no-check-certificate -O ~/.vim/autoload/plug.vim https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
	autocmd VimEnter * PlugInstall | source $MYVIMRC
endif

call plug#begin('~/.vim/plugged')

" Fetch plugins from the below GitHub repos.
Plug 'tpope/vim-sensible'
Plug 'junegunn/fzf', { 'dir': '~/.fzf', 'do': './install --all' }
Plug 'junegunn/fzf.vim'
Plug 'mileszs/ack.vim'
Plug 'sheerun/vim-polyglot'
Plug 'scrooloose/nerdcommenter'
Plug 'google/vim-searchindex'
Plug 'iberianpig/tig-explorer.vim'
Plug 'brookhong/cscope.vim'
Plug 'ludovicchabant/vim-gutentags'
Plug 'tpope/vim-sleuth'
Plug 'nelstrom/vim-visual-star-search'
Plug 'vimwiki/vimwiki'
Plug 'benmills/vimux'
Plug 'romainl/vim-qf'
Plug 'ericbn/vim-solarized'

" Use ':PlugUpdate' after making changes.
call plug#end()

"" ================ appearance ================
syntax enable
set background=dark
:silent! colorscheme solarized
let g:solarized_termtrans=1
set termguicolors

" Don't wrap long lines, necessitates scrolling horizontally.
set nowrap

" Enable line numbers.
set number

" Use F3 to toggle the display of whitespace characters.
nnoremap <F3> :set list!<CR>
set listchars=space:.,tab:>-,trail:~,extends:>,precedes:<

" Use F6 to toggle the display of a ruler at 80 characters.
nnoremap <F6> :execute "set colorcolumn=" . (&colorcolumn == "" ? "80" : "")<CR>

" Use F2 to toggle word wrapping.
nnoremap <F2> :set wrap!<CR>

" Use F5 to toggle line numbers.
nnoremap <F5> :set number!<CR>

"" ================ bindings ================
" Use space as mapleader.
let mapleader=" "

" Reload Vim settings.
nnoremap <Leader>re :so $MYVIMRC<CR>

" Use \ to open the last used buffer.
map \ :b#<CR>

" Scroll left and right.
nnoremap L 20zl
nnoremap H 20zh

nnoremap <c-j> :join<CR>

" Run a program (default is "man") to lookup the keyword under the cursor.
nnoremap <c-k> K

" Scroll up and down.
nmap K 3<c-y>
nmap J 3<c-e>

" Open new buffer with no name in the current window.
nnoremap <c-n> :enew<CR>

" Delete the file currently open.
nnoremap <Leader>rm :call delete(expand('%')) \| bdelete!<CR>

" Toggle paste mode.
set pastetoggle=<F4>

" Use ' to jump to exact position of mark.
map ' `

" Paste while keeping the clipboard intact.
xnoremap p pgvy

" Next and previous quickfix list results.
nnoremap <Leader>n :cn<CR>
nnoremap <Leader>N :cp<CR>

" Remove trailing whitespace.
fun! TrimWhitespace()
	let l:save=winsaveview()
	keeppatterns %s/\s\+$//e
	call winrestview(l:save)
endfun

nnoremap <Leader>w :call TrimWhitespace()<CR>

"" ================ seaching ================
" Highlight all matches.
set hlsearch

"" ================ split panes ================
set splitbelow
set splitright
" Set quickfix window height to 1/3 of Vim window height.
let &l:winheight=&lines / 3

"" ================ misc ================
set tabstop=4
" Speed up Vim startup time by disabling connection to the X server.
set clipboard=exclude:.*
" Allow modified buffers to be hidden.
set hidden

"" ================ fzf.vim ================
nnoremap ; :Buffers<CR>
nnoremap <c-p> :Files<CR>
nnoremap <Leader>r :Tags<CR>
nnoremap <Leader>R :BTags<CR>

" Search for and launch an executable file in the current directory with
" Termdebug.
nnoremap <Leader><c-d> :call fzf#run({
  \ "source": "rg --files --hidden --glob '!.git' --no-ignore",
  \ "sink": "Termdebug"})<CR>

"" ================ ack.vim ================
" Use rg to search.
if executable('rg')
	let g:ackprg='rg --vimgrep --hidden --glob "!.git" --'
endif

" Start project wide string search. Leave empty to search word under cursor.
nnoremap <Leader>, :Ack<Space>

" Automagically open the file with 'j' or 'k'.
let g:ackpreview=1

"" ================ vim-gutentags ================
let g:gutentags_generate_on_empty_buffer=1
let g:gutentags_file_list_command='rg --files'
" Allows looking up instrinsic definitions. Use instead of above line.
"let g:gutentags_file_list_command='rg --files /usr/lib/gcc/x86_64-linux-gnu/9/include .'

"" ================ tig-explorer.vim ================
" Open tig with current file.
nnoremap <Leader>t :TigOpenCurrentFile<CR>

" Open tig blame with current file.
nnoremap <c-b> :TigBlame<CR>

" Disable built-in terminal.
let g:tig_explorer_use_builtin_term=0

"" ================ cscope.vim ================
nnoremap <Leader>fa :call CscopeFindInteractive(expand('<cword>'))<CR>
nnoremap <Leader>l :call ToggleLocationList()<CR>

" s: Find this C symbol.
nnoremap <Leader>fs :call CscopeFind('s', expand('<cword>'))<CR>
" g: Find this definition.
nnoremap <Leader>fg :call CscopeFind('g', expand('<cword>'))<CR>
" d: Find functions called by this function.
nnoremap <Leader>fd :call CscopeFind('d', expand('<cword>'))<CR>
" c: Find functions calling this function.
nnoremap <Leader>fc :call CscopeFind('c', expand('<cword>'))<CR>
" t: Find this text string.
nnoremap <Leader>ft :call CscopeFind('t', expand('<cword>'))<CR>
" e: Find this egrep pattern.
nnoremap <Leader>fe :call CscopeFind('e', expand('<cword>'))<CR>
" f: Find this file.
nnoremap <Leader>ff :call CscopeFind('f', expand('<cword>'))<CR>
" i: Find files #including this file.
nnoremap <Leader>fi :call CscopeFind('i', expand('<cword>'))<CR>

"" ================ vimwiki ================
" Highlight different header levels in different colors.
let g:vimwiki_hl_headers=1

"" ================ vimux ================
" Run the last run shell CMD in the tmux split.
nnoremap <Leader>k :w<CR>:VimuxRunCommand("!!")<CR>
nnoremap <Leader>i :w<CR>:VimuxInterruptRunner<CR>:VimuxRunCommand("!!")<CR>

"" ================ termdebug ================
packadd termdebug
let g:termdebug_wide = 1
hi debugPC ctermbg=black guibg=black

nnoremap <Leader>j :Over<CR>
nnoremap <Leader>c :Continue<CR>
nnoremap <Leader>b :Break<CR>

" Launch Termdebug, run the '/path/to/executable_file' file with 'arg1 arg2'
" arguments.
nnoremap <Leader>d :Termdebug<CR>file /path/to/executable_file<CR>run arg1 arg2<CR>

" Launch Termdebug, use the 'attach_gdb.py' script to find and attach to a
" process with 'vswitchd' in the name, close the debugged program window and
" move focus back to the source code window.
nnoremap <Leader>D :Termdebug<CR>source ~/dotfiles/attach_gdb.py<CR><C-w>W<C-w>c<C-w>w