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vim/.vim/prefs/ui.vim

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+" disable/enable the cursor line on window enter/exit
+au WinEnter * setlocal cursorline
+au WinLeave * setlocal nocursorline
+
+highlight ExtraWhitespace ctermbg=red
+
+" enable extra syntax hilighting for C++
+let g:cpp_class_scope_highlight = 1
+let g:cpp_experimental_template_highlight = 1
+
+" AirLine visual settings
+if !exists('g:airline_symbols')
+    let g:airline_symbols = {}
+endif
+
+let g:airline_theme='onedark'
+" let g:airline_stl_path_style = 'short'
+
+let g:airline#extensions#coc#enabled = 1
+
+let g:airline_left_sep=''
+let g:airline_left_alt_sep = ''
+let g:airline_right_sep=''
+let g:airline_right_alt_sep = ''
+let g:airline_symbols.branch = ''
+let g:airline_symbols.readonly = ''
+let g:airline_symbols.dirty = ''
+let g:airline_symbols.linenr = '␤'
+"let g:airline_symbols.whitespace = 'Ξ'
+let g:airline_powerline_fonts = 1
+let g:airline#extensions#tabline#enabled = 1
+let g:airline#extensions#tabline#formatter = 'unique_tail_improved'
+let g:airline#extensions#tabline#show_buffers = 0
+let g:airline#extensions#tabline#show_splits = 1
+let g:airline#extensions#tabline#show_tabs = 1
+let g:airline#extensions#tabline#show_tab_nr = 0
+let g:airline#extensions#tabline#show_tab_type = 0
+let g:airline#extensions#tabline#exclude_preview = 1
+let g:airline#extensions#tabline#show_close_button = 0
+let g:airline#extensions#tabline#fnamemod = ':t'
+
+
+let g:airline_mode_map = {
+            \ '__' : '------',
+            \ 'n'  : 'NORMAL',
+            \ 'c'  : 'COMMAND',
+            \ 'i'  : 'INSERT',
+            \ 'R'  : 'REPLACE',
+            \ 's'  : 'SELECT',
+            \ 'S'  : 'S-LINE',
+            \ '' : 'S-BLOCK',
+            \ 'v'  : 'VISUAL',
+            \ 'V'  : 'V-LINE',
+            \ '' : 'V-BLOCK',
+            \ }
+
+let g:PaperColor_Theme_Options = {
+            \   'language': {
+            \     'python': {
+            \       'highlight_builtins' : 1
+            \     },
+            \     'cpp': {
+            \       'highlight_standard_library': 1
+            \     },
+            \     'c': {
+            \       'highlight_builtins' : 1
+            \     }
+            \   },
+            \   'theme': {
+            \     'default.dark': {
+            \       'transparent_background': 1
+            \     }
+            \   }
+            \ }
+
+
+" Function to let me know what syntax hilighting group is under the cursor.
+" Not used often
+function! SynGroup()
+    let l:s = synID(line('.'), col('.'), 1)
+    echo synIDattr(l:s, 'name') . ' -> ' . synIDattr(synIDtrans(l:s), 'name')
+endfun
+
+function! PhpSyntaxOverride()
+      " Put snippet overrides in this function.
+      hi! link phpDocTags phpDefine
+      hi! link phpDocParam phpType
+endfunction
+
+augroup phpSyntaxOverride
+    autocmd!
+autocmd FileType php call PhpSyntaxOverride()
+augroup END
+
+
+" Highlight the symbol and its references when holding the cursor.