Improve markdown

init.vim

@@ -54,6 +54,9 @@
     call plug#begin(g:plugged_home)
     " vim-plug bundles {{{
 
+        " VimScript Library
+        Plug 'inkarkat/vim-ingo-library'
+
         " UI related
         Plug 'chriskempson/base16-vim'
         Plug 'itchyny/lightline.vim'
@@ -209,6 +212,9 @@ tnoremap <Esc> <C-\><C-n>
         " autocmd BufWinEnter,InsertLeave,CursorMovedI * if index(HighlightWhitespacesBlacklist, &ft) < 0 | match ExtraWhitespace /\s\+\%#\@<!$\| \+\ze\t/
         " autocmd FileType markdown autocmd BufWinEnter,InsertLeave,CursorMovedI *
     augroup END
+    augroup DontItalicMarkdownLatexUnderscore
+        autocmd filetype markdown syntax match markdownIgnore "\$.*_.*\$" containedin=markdown
+    augroup END
 
     " " Colorscheme
     " let base16colorspace=256
@@ -452,7 +458,7 @@ endif
 
     " Full config: when writing or reading a buffer, and on changes in insert and
     " normal mode (after 1s; no delay when writing).
-    call neomake#configure#automake('nrwi', 500)
+    call neomake#configure#automake('nrwi', 2000)
 
     " Autoopen error list
     let g:neomake_open_list = 2 " 0: show hints, 1: show list and move cursor to list, 2: show list, but don't move cursor
@@ -719,7 +725,7 @@ augroup END
     let g:instant_markdown_mathjax = 1
     let g:instant_markdown_browser = "firefox --new-window"
     "let g:instant_markdown_port = 8888
-    "let g:instant_markdown_autoscroll = 0
+    let g:instant_markdown_autoscroll = 1
     "let g:instant_markdown_python = 1
 " }}
 
@@ -805,11 +811,11 @@ nnoremap * *zz
 nnoremap # #zz
 nnoremap g* g*zz
 nnoremap g# g#zz
- function! ZZWrap(...)
+function! ZZWrap(...)
      exec ':set so=999'
      exec join(a:000, ' ')
      exec ':set so=0'
- endfunction
+endfunction
 command! -nargs=* ZZ call ZZWrap(<f-args>)
 
 nnoremap <Space> :nohl<CR>
@@ -836,3 +842,61 @@ function! InsertSnip(snip_name)
 endfunction
 
 command! -nargs=1 R call InsertSnip(<f-args>)
+
+function! GenerateMarkdownHeaderAnchors()
+    let l:winview = winsaveview() " save cursor position
+    exec 'normal! gg'
+
+    let l:match = ingo#area#frompattern#Get(0, line('$'), '\v(^#+\s+)@<=.*')
+
+    for i in range(0, len(l:match)-1)
+        let l:line_nr = l:match[i][0][0]
+        let l:valid = 0 == len(ingo#area#frompattern#Get(l:line_nr, l:line_nr, '\v<a\s+.*name\=.*>'))
+        if l:valid
+            let l:line = getbufline(bufname(), l:line_nr)[0]
+            let l:title = join(split(l:line)[1:-1], '-')
+            let l:title = tolower(l:title)
+            let l:title = substitute(l:title, '\V%', '%25', 'g') " MUST be first!
+            let l:title = substitute(l:title, '\V\', '%5C', 'g')
+            let l:title = substitute(l:title, '\V^', '%5E', 'g')
+            let l:title = substitute(l:title, '\V&\|.\|/\|,\|=\|!\|@\|#\|(\|)\|*\|$\|<\|>\|"\|', '', 'g')
+            let l:title = substitute(l:title, "'", '', 'g')
+            let l:anchor = '<a name="' . l:title . '"></a>'
+            let l:next_line = l:line_nr+1
+            let l:failed = append(l:line_nr, l:anchor)
+            exec ':' . l:line_nr . ',' . l:next_line .'j'
+            " use append for appending to the line?
+        endif
+    endfor
+
+    call winrestview(l:winview) " restore cursor position
+endfunction
+
+function! RemoveMarkdownHeaderAnchors()
+    let l:winview = winsaveview() " save cursor position
+    exec 'normal! gg'
+
+    let l:match = ingo#area#frompattern#Get(0, line('$'), '\v(^#+\s+.*)@<=\s\<a\sname\=.*\>\</a\>')
+    for i in range(0, len(l:match)-1)
+        call winrestview({'lnum': l:match[i][0][0], 'col': l:match[i][0][1]-1})
+        let l:string_length = l:match[i][1][1] - l:match[i][0][1] + 1
+        exec "normal" '"_d' . l:string_length . "l"
+    endfor
+
+    call winrestview(l:winview) " restore cursor position
+endfunction
+
+function! GenerateMarkdownTOC()
+    " We need remove the anchors before we run doctoc. Otherwise it would
+    " include the anchors in the link, and the anchors would become incorrect
+    call RemoveMarkdownHeaderAnchors()
+    exec ":w"
+    silent exec "!doctoc " . bufname()
+    exec ":e"
+    call GenerateMarkdownHeaderAnchors()
+endfunction
+
+augroup MarkdownKeyBinds
+    autocmd!
+    autocmd FileType markdown nmap <Leader>lt :call GenerateMarkdownTOC()<CR>
+augroup END