From 0a9b5e78ca1f8fdedd233fe1703147158c193eab Mon Sep 17 00:00:00 2001
From: Sanchayan Maity <maitysanchayan@gmail.com>
Date: Mon, 2 Dec 2019 19:54:02 +0530
Subject: [PATCH] nvim: init.vim: Reintroduce QFGrep for cscope

Commit 6a26c59f removed Quickfix + QFGrep enhancement for
cscope since we wanted to use fzf and later skim. However,
since we now want to have as much as possible only pure
vimscript dependencies, reintroduce this so we need not
depend on fzf or any external fuzzy search tool anymore
with our recent usage of vim-clap.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
---
 nvim/init.vim | 101 ++++++++++++++++++++++++--------------------------
 1 file changed, 48 insertions(+), 53 deletions(-)

diff --git a/nvim/init.vim b/nvim/init.vim
index 310eeff..489e29d 100644
--- a/nvim/init.vim
+++ b/nvim/init.vim
@@ -9,7 +9,6 @@ Plug 'ervandew/supertab'
 " of words.
 Plug 'easymotion/vim-easymotion'
 " Fuzzy search
-Plug 'junegunn/fzf.vim'
 Plug 'liuchengxu/vim-clap'
 " Remove extraneous whitespace when edit mode is exited
 Plug 'thirtythreeforty/lessspace.vim'
@@ -37,6 +36,8 @@ Plug 'rbong/vim-flog'
 " For tmux yank
 Plug 'vim-utils/vim-husk'
 " Tags
+Plug 'sk1418/QFGrep'
+Plug 'steffanc/cscopemaps.vim'
 Plug 'ludovicchabant/vim-gutentags'
 Plug 'deoplete-plugins/deoplete-tag'
 " GDB
@@ -244,6 +245,7 @@ nnoremap <Leader>ghr :GitGutterPreviewHunk<CR>
 nnoremap <Leader>gqf :GitGutterQuickFix<CR>
 nnoremap <Leader>ggf :GitGutterFold<CR>
 " For Cscope
+nnoremap <Leader>cu :NeomakeSh cscope -bqR<CR>
 nnoremap <Leader>cr :cs reset<CR>
 " For Neomake
 nnoremap <Leader>nm  :Neomake<CR>
@@ -455,46 +457,39 @@ autocmd BufRead,BufNewFile *.md,*.txt setlocal spell spelllang=en_uk
 " Automatically resize the window
 autocmd VimResized * wincmd =
 
-" CScope & fuzzy integration
-" Taken from https://gist.github.com/amitab/cd051f1ea23c588109c6cfcb7d1d5776
-" However, the above gist has completely wrong mappings
-function! Cscope(option, query)
-  let color = '{ x = $1; $1 = ""; z = $3; $3 = ""; printf "\033[34m%s\033[0m:\033[31m%s\033[0m\011\033[37m%s\033[0m\n", x,z,$0; }'
-  let opts = {
-  \ 'source':  "cscope -dL" . a:option . " " . a:query . " | awk '" . color . "'",
-  \ 'options': ['--ansi', '--prompt', '> ',
-  \             '--multi', '--bind', 'alt-a:select-all,alt-d:deselect-all',
-  \             '--color', 'bw'],
-  \ 'down': '40%'
-  \ }
-  function! opts.sink(lines)
-    let data = split(a:lines)
-    let file = split(data[0], ":")
-    execute 'e ' . '+' . file[1] . ' ' . file[0]
-  endfunction
-  call fzf#run(opts)
+" For CScope and Quickfix
+" https://medium.com/@lakshmankumar12/quickfix-and-location-list-in-vim-ca0292ac894d
+" https://medium.com/@lakshmankumar12/vim-and-cscope-5f4558c8a8b8
+function! Cscope(oper, currword)
+  execute "normal mZ"
+  execute "set csqf=" . a:oper . "-"
+  execute "lcs find " a:oper . " " . a:currword
+  execute "lopen"
+  execute "wincmd p"
+  execute "normal `Z"
+  execute "set csqf="
 endfunction
 
 function! CscopeQuery(option)
   call inputsave()
-  if a:option == '9'
-    let query = input('Assignments to: ')
-  elseif a:option == '3'
-    let query = input('Functions calling: ')
-  elseif a:option == '2'
-    let query = input('Functions called by: ')
-  elseif a:option == '6'
-    let query = input('Egrep: ')
-  elseif a:option == '7'
-    let query = input('File: ')
-  elseif a:option == '1'
-    let query = input('Definition: ')
-  elseif a:option == '8'
-    let query = input('Files #including: ')
-  elseif a:option == '0'
+  if a:option == "s"
     let query = input('C Symbol: ')
-  elseif a:option == '4'
+  elseif a:option == "g"
+    let query = input('Definition: ')
+  elseif a:option == "d"
+    let query = input('Functions called by: ')
+  elseif a:option == "c"
+    let query = input('Functions calling: ')
+  elseif a:option == "t"
     let query = input('Text: ')
+  elseif a:option == "e"
+    let query = input('Egrep: ')
+  elseif a:option == "f"
+    let query = input('File: ')
+  elseif a:option == "i"
+    let query = input('Files #including: ')
+  elseif a:option == "a"
+    let query = input('Assignments to: ')
   else
     echo "Invalid option!"
     return
@@ -507,25 +502,25 @@ function! CscopeQuery(option)
   endif
 endfunction
 
-nnoremap <silent> <Leader>ss :call Cscope('0', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>sg :call Cscope('1', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>sd :call Cscope('2', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>sc :call Cscope('3', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>st :call Cscope('4', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>se :call Cscope('6', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>sf :call Cscope('7', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>si :call Cscope('8', expand('<cword>'))<CR>
-nnoremap <silent> <Leader>sa :call Cscope('9', expand('<cword>'))<CR>
+nnoremap <silent> <Leader>ss :call Cscope("s", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>sg :call Cscope("g", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>sd :call Cscope("d", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>sc :call Cscope("c", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>st :call Cscope("t", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>se :call Cscope("e", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>sf :call Cscope("f", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>si :call Cscope("i", expand('<cword>'))<CR>
+nnoremap <silent> <Leader>sa :call Cscope("a", expand('<cword>'))<CR>
 
-nnoremap <silent> <Leader><Leader>ss :call CscopeQuery('0')<CR>
-nnoremap <silent> <Leader><Leader>sg :call CscopeQuery('1')<CR>
-nnoremap <silent> <Leader><Leader>sd :call CscopeQuery('2')<CR>
-nnoremap <silent> <Leader><Leader>sc :call CscopeQuery('3')<CR>
-nnoremap <silent> <Leader><Leader>st :call CscopeQuery('4')<CR>
-nnoremap <silent> <Leader><Leader>se :call CscopeQuery('6')<CR>
-nnoremap <silent> <Leader><Leader>sf :call CscopeQuery('7')<CR>
-nnoremap <silent> <Leader><Leader>si :call CscopeQuery('8')<CR>
-nnoremap <silent> <Leader><Leader>sa :call CscopeQuery('9')<CR>
+nnoremap <silent> <Leader><Leader>ss :call CscopeQuery("s")<CR>
+nnoremap <silent> <Leader><Leader>sg :call CscopeQuery("g")<CR>
+nnoremap <silent> <Leader><Leader>sd :call CscopeQuery("d")<CR>
+nnoremap <silent> <Leader><Leader>sc :call CscopeQuery("c")<CR>
+nnoremap <silent> <Leader><Leader>st :call CscopeQuery("t")<CR>
+nnoremap <silent> <Leader><Leader>se :call CscopeQuery("e")<CR>
+nnoremap <silent> <Leader><Leader>sf :call CscopeQuery("f")<CR>
+nnoremap <silent> <Leader><Leader>si :call CscopeQuery("i")<CR>
+nnoremap <silent> <Leader><Leader>sa :call CscopeQuery("a")<CR>
 
 function! NvimGdbNoTKeymaps()
   tnoremap <silent> <buffer> <esc> <c-\><c-n>