Add text objects for list items

I put the function in lst.vim, not base.vim because it uses some
functions from lst.vim and because it's list stuff.

autoload/vimwiki/lst.vim

@@ -1410,6 +1410,24 @@ function! vimwiki#lst#setup_marker_infos() "{{{
 
 endfunction "}}}
 
+function! vimwiki#lst#TO_list_item(inner, visual) "{{{
+  let lnum = prevnonblank('.')
+  let item = s:get_corresponding_item(lnum)
+  if item.type == 0
+    return
+  endif
+  let from_line = item.lnum
+  if a:inner
+    let to_line = s:get_last_line_of_item(item)
+  else
+    let to_line = s:get_last_line_of_item_incl_children(item)
+  endif
+  normal! V
+  call cursor(to_line, 0)
+  normal! o
+  call cursor(from_line, 0)
+endfunction "}}}
+
 fun! vimwiki#lst#fold_level(lnum) "{{{
   let cur_item = s:get_item(a:lnum)
   if cur_item.type != 0

doc/vimwiki.txt

@@ -471,6 +471,9 @@ i\                      An inner cell in a table.
 ac                      A column in a table.
 ic                      An inner column in a table.
 
+al                      A list item plus it's children.
+il                      A single list item.
+
 
 ==============================================================================
 4. Commands                                                 *vimwiki-commands*
@@ -814,7 +817,7 @@ You can nest and mix the various types: >
   - Bulleted list item 3
 
 
-Note that a space after the list item markers (-, *, 1. etc.) are essential
+Note that a space after the list item markers (-, *, 1. etc.) is essential
 
 List items can span multiple lines: >
   * Item 1

ftplugin/vimwiki.vim

@@ -416,6 +416,12 @@ vnoremap <silent><buffer> ac :<C-U>call vimwiki#base#TO_table_col(0, 1)<CR>
 onoremap <silent><buffer> ic :<C-U>call vimwiki#base#TO_table_col(1, 0)<CR>
 vnoremap <silent><buffer> ic :<C-U>call vimwiki#base#TO_table_col(1, 1)<CR>
 
+onoremap <silent><buffer> al :<C-U>call vimwiki#lst#TO_list_item(0, 0)<CR>
+vnoremap <silent><buffer> al :<C-U>call vimwiki#lst#TO_list_item(0, 1)<CR>
+
+onoremap <silent><buffer> il :<C-U>call vimwiki#lst#TO_list_item(1, 0)<CR>
+vnoremap <silent><buffer> il :<C-U>call vimwiki#lst#TO_list_item(1, 1)<CR>
+
 if !hasmapto('<Plug>VimwikiAddHeaderLevel')
   nmap <silent><buffer> = <Plug>VimwikiAddHeaderLevel
 endif