Add a vim function to toggle a 'simple' view of the current buffer

vimrc

@@ -743,6 +743,7 @@ let g:tagbar_sort = 0
 "##################################################################################
 let g:gitgutter_enabled = 1
 let g:gitgutter_highlight_lines = 0
+
 nnoremap <leader>hh :GitGutterToggle<cr>
 nmap <leader>ha <Plug>(GitGutterStageHunk)
 nmap [h <Plug>(GitGutterNextHunk)
@@ -1079,6 +1080,12 @@ let errormarker_errorgroup = "BuildError"
 let errormarker_warninggroup = "BuildWarn"
 let errormarker_infogroup = "BuildInfo"
 
+" I don't know how to map to a plugin command, so I'm wrapping it with a function...ugh.
+function! ShowErrorAtCursor()
+    " This is defined in errormarker.vim
+    ErrorAtCursor
+endfunction
+nnoremap <leader>ce :call ShowErrorAtCursor()<cr>
 
 "/////////////////////////////////////////////////
 " CUSTOM ERROR FORMATS
@@ -1405,20 +1412,59 @@ noremap <leader>n :call RenameFile()<cr>
 "##################################################################################
 
 function! CenterPane()
-    " centers the current pane as the middle 2 of 4 imaginary columns
+    " Centers the current pane as the middle 2 of 4 imaginary columns should
-    " should be called in a window with a single pane
+    " be called in a window with a single pane.
     " Taken from https://dev.to/vinneycavallo/easily-center-content-in-vim
     lefta vnew
     wincmd w
     exec 'vertical resize' string(&columns * 0.65)
 endfunction
-nnoremap <leader>c :call CenterPane()<cr>
 
 function! RemoveCenterPane()
     wincmd w
     close
 endfunction
-nnoremap <leader>cw :call RemoveCenterPane()<cr>
+
+nnoremap <leader>cc :call CenterPane()<cr>
+nnoremap <leader>cd :call RemoveCenterPane()<cr>
+
+
+"##################################################################################
+" SIMPLE VIEW
+"##################################################################################
+
+" Applies a clean view of the current buffer by turning off line
+" numbers, trailing spaces, tabs and git diff markers in the gutter.
+
+function! ToggleSimpleView()
+    " I wasn't able to get this to apply to every copy of the same buffer,
+    " e.g. you have a split view showing the same file; only the active one
+    " will be affected, but they will share the same state!  I tried many
+    " different approaches (bufdo, looping over windows and buffers) and
+    " nothing worked. I looked at the gitgutter plugin since it supports
+    " toggling a buffer and it correctly modifies all instances, but the code
+    " is complex and there's so much just to do a simple thing. Fuck it. It's
+    " not worth the hassle and the inevitable hair pulling that I always
+    " experience when trying to do non-trivial things with this garbage
+    " scripting language.
+    if ! exists("b:simple_view_enabled")
+        let b:simple_view_enabled = 0
+    endif
+
+    if b:simple_view_enabled == 0
+        let b:simple_view_enabled = 1
+        setlocal nonumber
+        setlocal nolist
+        exec 'GitGutterBufferDisable'
+    else
+        let b:simple_view_enabled = 0
+        setlocal number
+        setlocal list
+        exec 'GitGutterBufferEnable'
+    endif
+endfunction
+
+nnoremap <leader>c :call ToggleSimpleView()<cr>
 
 "-----------------------------------------------------------------------------------------------------------------------