Major refactoring, added many menues and comfort features

1 files changed, 252 insertions, 160 deletions

diff --git a/vimrc-full b/vimrc-full
index 4e73d20..bbfeafa 100644
--- a/vimrc-full
+++ b/vimrc-full
@@ -9,9 +9,12 @@
 "=======================================================================================================================
 " GENERAL:
 "=======================================================================================================================
-set textwidth=120             | " better done with modeline
-set ts=4 sts=4 sw=4 expandtab | " better done with a modeline
-set redrawtime=1000           | " Timeout in milliseconds for redrawing the display / CTRL+L to retry
+set exrc                          | " enable exrc, a specific .exrc per project, which can contain usual .vimrc commands
+set textwidth=120                 | " better done with modeline or local exrc
+set ts=4 sts=4 sw=4 expandtab     | " better done with a modeline or local exrc
+set virtualedit=all               | " virtual edit should be default behaviour, because I don't see any reason against
+set number norelativenumber       | " turn line numbers on/off (performance decreases when they are shown)
+set ignorecase smartcase hlsearch | " search with ignorecase by default, but use case sensitive search when one captical char is contained and highlight while typing (even though its slower)
 
 "=======================================================================================================================
 " SHELL
@@ -89,42 +92,51 @@ if has('cscope') " compiled with cscope support?
   endif
 
   if has('menu')
-        menu &Cscope.create\ and\ add\ database
-        \ :execute '!find -regex ".*\.\(c\\|h\\|cpp\\|cxx\\|hh\\|hpp\\|hxx\)$" <bar> cscope -i- -b -q'<CR>:cscope kill -1<CR>:cscope add .<CR>
-        menu &Cscope.-Sep-
-        \ :
-        menu &Cscope.find.C\ symbol
-        \ :cscope find s <cword><CR>
-        menu &Cscope.find.definition
-        \ :cscope find g <cword><CR>
-        menu &Cscope.find.functions\ called\ by\ this
-        \ :cscope find d <cword><CR>
-        menu &Cscope.find.functions\ calling\ this
-        \ :cscope find c <cword><CR>
-        menu &Cscope.find.text\ string
-        \ :cscope find t <cword><CR>
-        menu &Cscope.find.egrep\ pattern
-        \ :cscope find e <cword><CR>
-        menu &Cscope.find.this\ file
-        \ :cscope find f <cword><CR>
-        menu &Cscope.find.files\ including\ this\ file
-        \ :cscope find i <cword><CR>
-        menu &Cscope.find.places\ where\ this\ symbol\ is\ assigned\ a\ value
-        \ :cscope find a <cword><CR>
-        menu &Cscope.-Sep-
-        \ :
-        menu &Cscope.add
-        \ :cscope add .<CR>
-        menu &Cscope.show
-        \ :cscope show<CR>
-        menu &Cscope.reset
-        \ :cscope reset<CR>
+    menu &:cscope.find.c\ symbol
+          \<tab>s
+          \ :cscope find s <cword><:cR>
+    menu &:cscope.find.definition
+          \<tab>g
+          \ :cscope find g <cword><:cR>
+    menu &:cscope.find.functions\ called\ by\ this
+          \<tab>d
+          \ :cscope find d <cword><:cR>
+    menu &:cscope.find.functions\ calling\ this
+          \<tab>c
+          \ :cscope find c <cword><:cR>
+    menu &:cscope.find.text\ string
+          \<tab>t
+          \ :cscope find t <cword><:cR>
+    menu &:cscope.find.egrep\ pattern
+          \<tab>e
+          \ :cscope find e <cword><:cR>
+    menu &:cscope.find.this\ file
+          \<tab>f
+          \ :cscope find f <cword><:cR>
+    menu &:cscope.find.files\ including\ this\ file
+          \<tab>i
+          \ :cscope find i <cword><:cR>
+    menu &:cscope.find.places\ where\ this\ symbol\ is\ assigned\ a\ value
+          \<tab>a
+          \ :cscope find a <cword><:cR>
+    menu &:cscope.-Sep1-
+          \ :
+    menu &:cscope.create\ and\ add\ database
+          \ :cscope kill -1<CR>:execute '!find -regex ".*\.\(c\\|h\\|cpp\\|cxx\\|hh\\|hpp\\|hxx\)$" <bar> cscope -i- -b -q'<CR>:cscope add .<CR>
+    menu &:cscope.-Sep2-
+          \ :
+    menu &:cscope.add\ \.
+          \ :cscope add .<CR>
+    menu &:cscope.show
+          \ :cscope show<CR>
+    menu &:cscope.reset
+          \ :cscope reset<CR>
   endif
 endif
 
-" =======================================================================================================================
+" ======================================================================================================================
 " GUI_VERSION
-" =======================================================================================================================
+" ======================================================================================================================
 if has("gui_running")
   set guicursor=a:block-blinkon100
   set browsedir=buffer
@@ -145,82 +157,91 @@ if has("gui_running")
 
   " its possible to define alternative fonts (order matters)
   set guifont=
-  set guifont+=Dejavu\ Sans\ Mono\ for\ Powerline\ Semibold
-  set guifont+=RobotoMono\ Nerd\ Font\ Medium\ 10
+  set guifont+=Source\ Code\ Pro\ for\ Powerline\ SemiBold\ 10
   set guifont+=LiterationMono\ Nerd\ Font\ Mono\ 10
+  set guifont+=RobotoMono\ Nerd\ Font\ Medium\ 10
   set guifont+=Source\ Code\ Pro\ Semi-Bold\ 10
-  set guifont+=Source\ Code\ Pro\ for\ Powerline\ SemiBold\ 10
+  set guifont+=Dejavu\ Sans\ Mono\ for\ Powerline\ Semibold
   set guifont+=Droid\ Sans\ Mono\ for\ Powerline\ 10
   set guifont+=Meslo\ LG\ M\ for\ Powerline\ 10
+
+  " like in the terminal: use ctrl-shift-v for paste in vim's command editor
+  cnoremap <c-s-v> <c-r>*
 endif
 
-" =======================================================================================================================
+" ======================================================================================================================
 "  SETTINGS:
-" =======================================================================================================================
-set noautochdir               | " When on, Vim will change the current working directory
+" ======================================================================================================================
 set breakindent               | " Every wrapped line will continue visually indented
 set clipboard=unnamedplus     | " makes copy and paste work (autoselectplus might work as well)
-set cmdheight=2               | " sets the command line's height
-set complete+=d               | " scan current and included files for defined name or macro
-set complete+=i               | " scan current and included files for completions
-set colorcolumn=              | " not used, because we have a :match directive for textwidth
 set concealcursor=nc          | " limits the display of concealed text to normal and command mode
 set conceallevel=2            | " replace escaped chars by their utf-8 representation (useful for LaTeX)
 set confirm                   | " asks 'do you want to save?'
 set cpoptions+=P              | " makes :w filename set the current buffer to filename
 set hidden                    | " allows switiching buffers even if the current buffer contains changes (displays +)
-set hlsearch                  | " highlights all search matches (not as performant!)
-set ignorecase smartcase      | " search with ignorecase by default, but use case sensitive search when one captical char is contained
-set lazyredraw                | " disables redraw during macro exectution (improves performance)
 set linebreak                 | " wrap long lines at char 'breakat', not inside words
-set mouse=n                   | " allow mouse in normal mode only, so one can use the terminals c&p feature in insert mode
 set mousemodel=popup          | " only in gvim: right click opens a popup-menu
-set nocursorcolumn            | " turn visual cursor column off (improves performance)
-set nrformats+=alpha          | " allows CTRL-A & CTRL-X to increment and decrement letters, not just numbers
-set nofoldenable              | " disable folding, because we have zi to toggle foldenable :)
-set exrc                      | " enable exrc, a specific .exrc per project, which can contain usual .vimrc commands
-set foldmethod=syntax         | " foldlevel: syntax, indent, manual
-set foldcolumn=0              | " I think I don't need this second indicator
-set foldclose=all             | " automatically fold, when the cursor leaves the folded area
-set foldopen=block,hor,search | " when do we unfold?
-set foldtext=Foldtext()       | "
-set foldnestmax=1             | " top level folding only
-set norelativenumber          | " relative line numbers can speed up navigation, but I could not get used to it till now
-set noshowmode                | " because we are using some powerline derivat
+set mouse=n                   | " allow mouse in normal mode only, so one can use the terminals c&p feature in insert mode
+set noautochdir               | " When on, Vim will change the current working directory
 set nostartofline             | " when scrolling: do not move the cursor to column 1
-set notimeout ttimeout        | " improves performance but is known to cause problems on slow terminals
-set ttimeoutlen=50            | " set esc key timeout in ms-
 set nowrap                    | " but do not (by default) wrap long lines around
-set number                    | " turn line numbers on/off (performance decreases when they are shown)
-set pumheight=8               | " Determines the maximum number of items to show in the popup menu for
+set nrformats+=alpha          | " allows CTRL-A & CTRL-X to increment and decrement letters, not just numbers
 set path+=**                  | " allow recursive searches for files
+set pumheight=8               | " Determines the maximum number of items to show in the popup menu for
 set scrolljump=5              | " how many lines get scrolled into view when cursor reaches the screens edge
-set splitbelow                | " open new windows below the current one (i find that more intuitive)
+set scrolloff=0               | " keeps cursor centered
 set shiftround                | " indent/unindent snaps to multiple of shiftwidths
-set shortmess+=I              | " don't give the intro message when starting Vim |:intro|.
-set showcmd                   | " essential: show keys of combined commands in the lower right corner (BUT SLOW, makes cursor flickering)
+set writedelay=0
+
+" display and performance
+set lazyredraw                | " disables redraw during macro exectution (improves performance)
+set cmdheight=2               | " sets the command line's height
 set signcolumn=yes            | " auto=auto hide, yes=always, no=never show the column with error indicators
-set showtabline=2             | " 0: never, 1: only if there are at least two tabs, 2:always
-set winwidth=30               | " keep NERDTreeWindow at least this size
-set winminwidth=0             | " (and all other windows, so TODO: watch out)
-set tags+=../tags
-set tagcase=match             | " tagcase match, because we mostly use ^] to jump around and that variant respects the upper/lower case [followscs, followic, match, ignore]
+set nocursorcolumn            | " turn visual cursor column off (improves performance)
 set updatetime=80             | " updates the screen more often
-set viminfo+=%                | " restore buffer list
-set virtualedit=all           | " virtual edit should be default behaviour, because I don't see any reason against
-set writedelay=0
+set redrawtime=1000           | " Timeout in milliseconds for redrawing the screen (switches syntax off when ssh too slow) / CTRL+L to retry
+set notimeout                 | " improves performance but is known to cause problems on slow terminals
+set ttimeout ttimeoutlen=50   | " set esc key timeout in ms-
+set showcmd                   | " essential: show keys of combined commands in the lower right corner (BUT SLOW, makes cursor flickering)
+set showtabline=2             | " 0: never, 1: only if there are at least two tabs, 2:always
+set shortmess+=I              | " don't give the intro message when starting Vim |:intro|.
 set wildmenu                  | " use a menu in the command line
 set wildmode=longest:full     | " do not preselect any entry and show all possible
+
+" code completion
+set complete+=d               | " scan current and included files for defined name or macro
+set complete+=i               | " scan current and included files for completions
+set tagcase=match             | " tagcase match, because we mostly use ^] to jump around and that variant respects the upper/lower case [followscs, followic, match, ignore]
+set tags+=../tags
+
+" code folding...
+set nofoldenable              | " disable folding, because we have zi to toggle foldenable :)
+set foldclose=all             | " automatically fold, when the cursor leaves the folded area
+set foldcolumn=0              | " I think I don't need this second indicator
+set foldmethod=syntax         | " foldlevel: syntax, indent, manual
+set foldnestmax=1             | " top level folding only
+set foldopen=block,hor,search | " when do we unfold?
+set foldtext=Foldtext()       | "
+
+" vim window behaviour
+set splitbelow                | " open new windows below the current one (i find that more intuitive)
+set winminwidth=0             | " (and all other windows, so TODO: watch out)
+set winwidth=30               | " keep NERDTreeWindow at least this size
+
+
+" vim session handling and restore behaviour
+set viminfo+=%                | " restore buffer list
 set sessionoptions=
 set sessionoptions+=buffers
 set sessionoptions+=curdir
 set sessionoptions+=folds
+set sessionoptions+=resize
+set sessionoptions+=slash
 set sessionoptions+=tabpages
+set sessionoptions+=unix
 set sessionoptions+=winpos
 set sessionoptions+=winsize
-set sessionoptions+=resize
-set sessionoptions+=unix
-set sessionoptions+=slash
+
 
 " set nocindent smartindent     | " use smart indent rather then cindent
 set noautoindent
@@ -255,7 +276,6 @@ else           " default Vim?
   set ttyscroll=100   | " improves speed for terminal vim, incomp. with nvim
   set ttyfast         | " improves speed for terminal vim (incomp. with nvim)
   set nottybuiltin    | " use external termcaps
-  " set termguicolors | " When on, uses highlight-guifg and highlight-guibg attributes in the terminal (=24bit color) incomp. with nvim
   set restorescreen   | " restores the console after exiting vim (intentionally not in nvim)
   "
   let g:loaded_ruby_provider = 1 " disable ruby support
@@ -408,45 +428,93 @@ if has("autocmd")
         set wcm=<C-Z>
         map <F4> :emenu <C-Z>
 
-        menu &Chdir.Git\ root<tab>:Gcd
-        \ :Gcd<CR>:pwd<CR>
+        menu &Directory.print\ current\ directory
+              \<Tab>:pwd
+              \ :pwd<CR>
+
+        menu &Directory.-Sep- :
+
+        menu &Directory.Change\ to\ GIT\ root
+              \<Tab>:Gcd
+              \ :Gcd<CR>:pwd<CR>
 
-        menu &Chdir.current\ buffer<tab>:cd\ %:h
-        \ :cd %:h<CR>:pwd<CR>
+        menu &Directory.Change\ to\ current\ buffers\ directory\ (global)
+              \<tab>:cd\ %:p:h
+              \ :cd %:h<CR>:pwd<CR>
 
-        menu &Chdir.current\ buffer<tab>:lcd\ %:p:h
-        \ :lcd %:p:h<CR>:pwd<CR>
+        menu &Directory.Change\ to\ current\ buffers\ directory\ (local\ window)<tab>:lcd\ %:p:h
+              \ :lcd %:p:h<CR>:pwd<CR>
 
         menu &Git.&Display\ last\ changes
-        \ :let g:signify_vcs_cmds={'git': 'git diff --no-color --no-ext-diff -U0 HEAD^ -- %f'}<CR>:SignifyRefresh<CR>
+              \ :let g:signify_vcs_cmds={'git': 'git diff --no-color --no-ext-diff -U0 HEAD^ -- %f'}<CR>:SignifyRefresh<CR>
 
-        menu &UI.&Open\ in\ Serversession
-        \ :execute ':!nvr --servername /tmp/nvimsocket --remote % +'.line('.')<CR>:stopinsert<CR>:set readonly<CR>
+        menu &Match.Clear\ All\ Matches
+              \<Tab><F6>
+              \ :call clearmatches()<CR>
+
+        menu &Match.-Sep- :
+
+        menu &Match.&dispensable\ white\ spaces
+              \ :call matchadd("Convention", '\s\+$', 0)<CR>
+
+        menu &Match.&long\ lines\ (exeeding\ textwidth)
+              \ :call matchadd("Convention", '\%>'.&textwidth.'v.', 0)<CR>
 
-        menu &Verify.&Textwidth\ and\ white\ space
-        \ :execute ':match Error /\%>'.&textwidth.'v./'<CR>
-        \ :2match Error /\s\+$/<CR>
+        menu &Match.Highlight\ current\ file\ name
+              \ :call matchadd("Search", escape(expand('%:t'), '.'))<CR>
+
+        " :execute ':match SpellBad /'.escape(expand('%:t'), '.').'/'<CR>
 
-        menu &Verify.Highlight\ current\ file\ name
-        \ :execute ':match SpellBad /'.escape(expand('%:t'), '.').'/'<CR>
         menu &Window.-Sep- :
 
         menu &Window.Quickfix\ List
-        \ :copen<CR>
+              \ :copen<CR>
 
         menu &Window.Location\ List
-        \ :lopen<CR>
+              \ :lopen<CR>
 
         menu &Window.Scratch
-        \ :Scratch<CR>
-
-        menu &Find.file\ under\ the\ cursor<Tab>:gf
-        \ gf
+              \ :Scratch<CR>
+
+
+        menu &Find.file\ under\ the\ cursor
+              \<Tab>gf
+              \ gf
+
+        menu &Find.Open\ search\ results\ in\ location\ list
+              \<Tab>:gf
+              \ :execute ':vimgrep /'.escape(getreg('/'), '.').'/g %'<CR>
+              \ :copen<CR>
+
+        menu &Changes.list
+              \<Tab>:changes
+              \ :changes<CR>
+        menu &Changes.-Sep- :
+        menu &Changes.previous
+              \<Tab>g;
+              \ g;
+        menu &Changes.next
+              \<Tab>g,
+              \ g,
+
+        menu &Jump.list
+              \<Tab>:jumps
+              \ :jumps<CR>
+        menu &Jump.-Sep1- :
+        menu &Jump.previous\ position
+              \<Tab>CTRL-O
+              \ <C-O>
+        menu &Jump.next\ position
+              \<Tab>CTRL-I
+              \ <C-I>
+        menu &Jump.-Sep2- :
+        menu &Jump.clear\ list
+              \<Tab>:clearjumps
+              \ :clearjumps
 
+        menu &UI.&Open\ in\ Serversession
+              \ :execute ':!nvr --servername /tmp/nvimsocket --remote % +'.line('.')<CR>:stopinsert<CR>:set readonly<CR>
 
-        menu &Find.Open\ search\ results\ in\ location\ list<Tab>:gf
-        \ :execute ':vimgrep /'.escape(getreg('/'), '.').'/g %'<CR>
-        \ :copen<CR>
     endif
 
 
@@ -618,26 +686,31 @@ let g:lightline_buffer_reservelen               = 20
 "    \     'left': [ [ 'bufferinfo' ], [ 'bufferbefore', 'buffercurrent', 'bufferafter' ], ],
 let g:lightline = {
     \   'tabline': {
-    \     'left': [ [ 'bufferinfo' ], [ 'bufferbefore', 'buffercurrent', 'bufferafter' ], ],
-    \     'right': [ [], [ 'close' ] ],
+    \     'left': [ [ 'bufferinfo', 'absolutepath' ] ],
+    \     'right': [ [], [ 'buffer_alt' ] ],
     \   },
-    \   'colorscheme': 'Tomorrow_Night_Bright',
+    \   'colorscheme': 'Tomorrow_Night',
     \   'separator': { 'left': "\ue0b0", 'right': "\ue0b2" },
     \   'subseparator': { 'left': "\ue0b1", 'right': "\ue0b3" },
     \   'inactive': {
-    \     'left': [['readonly', 'gitbranch', 'absolutepath']]},
+    \     'left': [ ['gitbranch', 'filename'] ],
+    \     'right': [ [ 'percent', 'lineinfo' ],
+    \                [ 'spell', 'fileencoding', 'fileformat', 'filetype' ]
+    \              ]
+    \   },
     \   'active': {
     \     'left': [ [ 'mode', 'paste', 'readonly' ],
-    \               [ 'gitbranch', 'absolutepath' ],
+    \               [ 'gitbranch', 'filename' ],
     \               [ 'tagbar' ] ],
     \     'right': [ [ 'percent', 'lineinfo' ],
     \                [ 'spell', 'fileencoding', 'fileformat', 'filetype' ]
-    \              ],
+    \              ]
     \   },
     \   'component': {
     \           'tagbar': '%{substitute(tagbar#currenttag("%s", "", "fs"), "\(.*\)", "", "")}',
     \           'ycmparent': '%{substitute(execute("YcmComplete GetParent"), "\(.*\)", "", "")}',
-    \           'filename': '%t'
+    \           'filename': '%t',
+    \           'buffer_alt': '#:%{expand("#:t")}'
     \   },
     \   'component_expand': {
     \     'buffercurrent': 'lightline#buffer#buffercurrent2',
@@ -657,45 +730,67 @@ let g:lightline = {
     \   },
     \ }
 
-function! ExtendLightlineColorTheme()
-  highlight! link LightlineMiddle_normal Normal
-endfunction
-
-autocmd! ColorScheme * call ExtendLightlineColorTheme()
+set noshowmode | " mode will be shown twice, in lightline and below, so we want to deactivate one
+set statusline=
+set statusline+=%t%m
+set statusline+=%{TagInStatusLine()}
+set statusline+=%#warningmsg#
+set statusline+=%{SyntasticStatuslineFlag()}
+set statusline+=%*%=
+set statusline+=%l:%c(%p%%)
 
 " Autocompleter: =====================================
 " if has("python")
+
+  " ULTISNIPS: code snippet ============================================================================================
+  Plug 'honza/vim-snippets'                      " dependency of ultisnips (see below)
+  Plug 'SirVer/ultisnips'                        " replaces loremipsum (and many more)
+  let g:UltiSnipsExpandTrigger       = '<Tab>'|  " expands the snippet, be careful not to use <tab> elsewhere (ycm uses it by default, but it has been deactivated by g:ycm_key_list_select_completion)
+
+  let g:UltiSnipsJumpForwardTrigger  = '<Tab>'| 
+  let g:UltiSnipsJumpBackwardTrigger = '<S-Tab>'|
+  "d let g:UltiSnipsJumpForwardTrigger  = '<PageDown>'
+  " let g:UltiSnipsJumpBackwardTrigger = '<PageUp>'
+  "let g:UltiSnipsExpandTrigger       = '<C-j>'| " Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
+  "let g:UltiSnipsJumpForwardTrigger  = '<C-j>'| " \
+  "let g:UltiSnipsJumpBackwardTrigger = '<C-k>'| " \
+  "let g:UltiSnipsListSnippets        = '<C-`>'| " YouCompleteMe includes those, so this isn't necessary
+  "let g:UltiSnipsListSnippets        = '<leader><leader>'| " YouCompleteMe includes those, so this isn't necessary
+  """ Ultisnips
+  " let g:UltiSnipsExpandTrigger="<c-tab>"
+  " let g:UltiSnipsListSnippets="<c-s-tab>"
+
   " YouCompleteMe: =====================================================================================================
   " Plug 'Valloric/MatchTagAlways'                           " highlights the closing tag/brace/...
   Plug 'Valloric/YouCompleteMe'
-  " Plug 'vim-scripts/dbext.vim'                       " dependency to allow db related completions
-  let g:ycm_server_python_interpreter                = 'python3'
-  let g:ycm_python_binary_path                       = '/usr/bin/python3' " the python interpreter of choice (for code checking)
-  let g:ycm_add_preview_to_completeopt               = 1   " reuse existing preview window
-  let g:ycm_autoclose_preview_window_after_insertion = 1
-  let g:ycm_collect_identifiers_from_tags_files      = 0   " Let YCM read tags from Ctags file
-  let g:ycm_seed_identifiers_with_syntax             = 1   " Completion for programming language's keyword
-  let g:ycm_complete_in_comments                     = 1   " Completion in comments
-  let g:ycm_complete_in_strings                      = 1   " Completion in string
   let g:ycm_error_symbol                             = '✖' " insert this as an error symbol in the gutter bar
-  let g:ycm_auto_trigger                             = 1
-  let g:ycm_min_num_of_chars_for_completion          = 6   " we normally avoid identifier based completion, it just helps with long words. Use semantic completions with <C-Space> instead
-  let g:ycm_min_num_identifier_candidate_chars       = 4
-
-  let g:ycm_max_num_identifier_candidates            = 10
-  let g:ycm_max_num_candidates                       = 50
-
-
-  let g:ycm_use_ultisnips_completer                  = 1   " Default 1, just ensure
   let g:ycm_warning_symbol                           = '➔' " insert this as a warning symbol in the gutter bar
-  let g:ycm_confirm_extra_conf                       = 0   " security is overrated
-  let g:ycm_key_list_select_completion               = ['<Down>']
-  let g:ycm_key_list_previous_completion             = ['<Up>']
-  let g:ycm_global_ycm_extra_conf                    = '.ycm_extra_conf.py'
-  let g:ycm_semantic_triggers                        = { 'c': [ 're!.' ] }
-  " let g:ycm_disable_for_files_larger_than_kb         = 16384 " we have faaast computers, don't we?
-  let g:ycm_show_diagnostics_ui                      = 0
-  " disable <tab>-key for YCM so that it can be used with ultisnips
+  let g:ycm_auto_trigger                             = 1
+  let g:ycm_autoclose_preview_window_after_insertion = 1
+  " Plug 'vim-scripts/dbext.vim'                       " dependency to allow db related completions
+  " let g:ycm_server_python_interpreter                = 'python3'
+  " let g:ycm_python_binary_path                       = '/usr/bin/python3' " the python interpreter of choice (for code checking)
+  " let g:ycm_add_preview_to_completeopt               = 1   " reuse existing preview window
+  " let g:ycm_collect_identifiers_from_tags_files      = 0   " Let YCM read tags from Ctags file
+  " let g:ycm_seed_identifiers_with_syntax             = 1   " Completion for programming language's keyword
+  " let g:ycm_complete_in_comments                     = 1   " Completion in comments
+  " let g:ycm_complete_in_strings                      = 1   " Completion in string
+  " let g:ycm_min_num_of_chars_for_completion          = 6   " we normally avoid identifier based completion, it just helps with long words. Use semantic completions with <C-Space> instead (terrible idea, html snippets not working!)
+  " let g:ycm_min_num_identifier_candidate_chars       = 4
+
+  " let g:ycm_max_num_identifier_candidates            = 10
+  " let g:ycm_max_num_candidates                       = 50
+
+
+  " let g:ycm_use_ultisnips_completer                  = 1   " Default 1, just ensure
+  " let g:ycm_confirm_extra_conf                       = 0   " security is overrated
+  " let g:ycm_key_list_select_completion               = ['<Down>']
+  " let g:ycm_key_list_previous_completion             = ['<Up>']
+  " let g:ycm_global_ycm_extra_conf                    = '.ycm_extra_conf.py'
+  " let g:ycm_semantic_triggers                        = { 'c': [ 're!.' ] }
+  " " let g:ycm_disable_for_files_larger_than_kb         = 16384 " we have faaast computers, don't we?
+  " let g:ycm_show_diagnostics_ui                      = 0
+  " " disable <tab>-key for YCM so that it can be used with ultisnips
   let g:ycm_key_list_select_completion=[]
   let g:ycm_key_list_previous_completion=[]
 
@@ -720,18 +815,6 @@ autocmd! ColorScheme * call ExtendLightlineColorTheme()
   let g:syntastic_warning_symbol              = '➔'
   let g:syntastic_style_warning_symbol        = '≈'
 
-  " ULTISNIPS: code snippet ==============================================================================================
-  Plug 'honza/vim-snippets'                                     " dependency of ultisnips (see below)
-  Plug 'SirVer/ultisnips'                        " replaces loremipsum (and many more)
-  "let g:UltiSnipsExpandTrigger       = '<C-j>'| " Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
-  "let g:UltiSnipsJumpForwardTrigger  = '<C-j>'| " \
-  "let g:UltiSnipsJumpBackwardTrigger = '<C-k>'| " \
-  "let g:UltiSnipsListSnippets        = '<C-`>'| " YouCompleteMe includes those, so this isn't necessary
-  "let g:UltiSnipsExpandTrigger       = '<leader><tab>'| " Trigger configuration. Do not use <tab> if you use https://github.com/Valloric/YouCompleteMe.
-  "let g:UltiSnipsJumpForwardTrigger  = '<PageDown>'| " \
-  "let g:UltiSnipsJumpBackwardTrigger = '<PageUp>'| " \
-  "let g:UltiSnipsListSnippets        = '<leader><leader>'| " YouCompleteMe includes those, so this isn't necessary
-
   " JEDI: ==============================================================================================================
   Plug 'davidhalter/jedi-vim'               " jedi gets used to display python function signatures
   let g:jedi#completions_enabled        = 0 " we do not need completions, because we have YouCompleteMe
@@ -799,7 +882,7 @@ function! ExtendColorTheme()
   " highlight! NonText guibg=NONE guifg=black ctermbg=NONE ctermfg=black
 
   " make the ~ (tilde) indicator invisible, which usually marks the EOF
-  highlight! EndOfBuffer ctermfg=bg
+  highlight! link EndOfBuffer Ignore
 
   highlight! CursorLineNr cterm=inverse | " ctermbg=black ctermfg=NONE
   highlight! Pmenu ctermbg=LightYellow ctermfg=DarkGrey
@@ -830,16 +913,27 @@ function! ExtendColorTheme()
   highlight! link SpecialKey NonText
 
 
-  " Show trailing whitepace and spaces before a tab as part of the syntax highlighting
-  autocmd Syntax * syn match Error /\s\+$\| \+\ze\t/ containedin=ALL
   " automatically enter list mode when going in insert mode (makes above syntax command temporarily ineffective)
   autocmd InsertEnter * set list
   autocmd InsertLeave * set nolist
+
+  " Show trailing whitepace and spaces before a tab as part of the syntax highlighting
+  highlight! link Convention Error
+  autocmd BufEnter,InsertLeave * syntax match Convention /\s\+$\| \+\ze\t/ containedin=ALL
+  autocmd InsertEnter * syntax clear Convention
+  " autocmd BufEnter,InsertLeave * execute ':syntax match Convention /\%>'.&textwidth.'v./ containedin=ALL'
+
+  autocmd InsertEnter * set colorcolumn=80,120
+  autocmd InsertLeave * set colorcolumn&
+  " set colorcolumn=                  | " not used, because we have a :match directive for textwidth
+
 endfunction
 autocmd! ColorScheme * call ExtendColorTheme()
 
 
-" colorscheme PaperColor
+set termguicolors | " When on, uses highlight-guifg and highlight-guibg attributes in the terminal (=24bit color) incomp. with nvim
+" set background=dark
+set t_ut=
 if filereadable(expand("~/.config/base16-shell/colortest"))
   let g:base16_shell_path="~/.config/base16-shell/scripts"
 endif
@@ -851,7 +945,6 @@ else
   colorscheme base16-phd
 endif
 
-" set background=dark
 
 " ======================================================================================================================
 " TESTING:
@@ -861,8 +954,7 @@ endif
 "     silent autocmd VimEnter * nested :silent bun
 " endif
 
-set scrolloff=0               | " keeps cursor centered
 autocmd VimEnter,WinEnter * exec ':set scrolljump='.winheight(0)/2
-
+ 
 " display highlight group under the cursor
 map <leader>h :echo map(synstack(line('.'), col('.')), 'synIDattr(v:val, "name")')<CR>