nvim: add nvim configs

dot_config/nvim/lua/utils/init.lua

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+require("utils.zenkaku")
+require("utils.trim")
+require("utils.setindent")

dot_config/nvim/lua/utils/setindent.lua

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+-- Functions
+local setIndentWidth = function(w)
+    vim.opt.tabstop = w
+    vim.opt.softtabstop = w
+    vim.opt.shiftwidth = w
+    print("Tab width is now set", w)
+end
+
+vim.keymap.set('n', '<leader>T2', function() setIndentWidth(2) end)
+vim.keymap.set('n', '<leader>T4', function() setIndentWidth(4) end)

dot_config/nvim/lua/utils/trim.lua

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+-- Trim
+vim.cmd([[
+command! Trim call TrimSpace()
+function! TrimSpace()
+    let save_cursor = getpos(".")
+    %s#\ \+$##e
+    %s#\($\n\s*\)\+\%$##e
+    call setpos('.', save_cursor)
+endfunction
+
+command! TrimDisable call TrimAuto(0)
+command! TrimEnable call TrimAuto(1)
+function! TrimAuto(enable)
+    if a:enable == 1
+        augroup TrimAuto
+            au!
+            au BufWritePre * Trim " See: ~/.config/nvim/functions/Trim.vim
+        augroup END
+    else
+        augroup TrimAuto
+            au!
+        augroup END
+    endif
+endfunction
+
+call TrimAuto(1)
+]])

dot_config/nvim/lua/utils/zenkaku.lua

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+-- ZenkakuSpace
+vim.cmd([[
+function! ZenkakuSpace()
+    highlight ZenkakuSpace cterm=underline guibg=lightred
+endfunction
+
+if has('syntax')
+    augroup ZenkakuSpace
+        autocmd!
+        autocmd ColorScheme * call ZenkakuSpace()
+        autocmd VimEnter,WinEnter,BufRead * let w:m1=matchadd('ZenkakuSpace', '　')
+    augroup END
+    call ZenkakuSpace()
+endif
+]])