Fixed bug where toc did not find input file

ftplugin/latextoc.vim

@@ -55,12 +55,10 @@ function! s:toc_activate(close)
   let titlestr = s:toc_escape_title(entry['text'])
 
   " Search for duplicates
-    "
   let i=0
   let entry_hash = entry['level'].titlestr
   let duplicates = 0
   while i<n
-        let i_entry = b:toc[n]
     let i_hash = b:toc[i]['level'].s:toc_escape_title(b:toc[i]['text'])
     if i_hash == entry_hash
       let duplicates += 1
@@ -72,24 +70,14 @@ function! s:toc_activate(close)
 
   execute b:calling_win . 'wincmd w'
 
-    let bnr = bufnr(entry['file'])
-    if bnr == -1
-        execute 'badd ' . entry['file']
-        let bnr = bufnr(entry['file'])
-    endif
+  let files = [entry['file']]
+  for line in filter(readfile(entry['file']), 'v:val =~ ''\\input{''')
+    call add(files, matchstr(line, '{\zs.*\ze\(\.tex\)\?}') . '.tex')
+  endfor
 
-    execute 'buffer! ' . bnr
-
-    " skip duplicates
-    while duplicates > 0
-        if search('\\' . entry['level'] . '\_\s*{' . titlestr . '}', 'ws')
-            let duplicates -= 1
-        endif
-    endwhile
-
-    if search('\\' . entry['level'] . '\_\s*{' . titlestr . '}', 'ws')
-        normal! zv
-    endif
+  " Find section in buffer (or inputted files)
+  call s:toc_find_match('\\' . entry['level'] . '\_\s*{' . titlestr . '}',
+        \ duplicates, files)
 
   if a:close
     if g:latex_toc_resize
@@ -119,6 +107,42 @@ function! s:toc_escape_title(titlestr)
   return substitute(titlestr, ' ', '\\_\\s\\+', 'g')
 endfunction
 
+" {{{1 s:toc_find_match
+function! s:toc_find_match(strsearch,duplicates,files)
+
+  call s:toc_open_buf(a:files[0])
+  let dups = a:duplicates
+
+  " Skip duplicates
+  while dups > 0
+    if search(a:strsearch, 'w')
+      let dups -= 1
+    else
+      break
+    endif
+  endwhile
+
+  if search(a:strsearch, 'w')
+    normal! zv
+    return
+  endif
+
+  call s:toc_find_match(a:strsearch,dups,a:files[1:])
+
+endfunction
+
+" {{{1 s:toc_open_buf
+function! s:toc_open_buf(file)
+
+  let bnr = bufnr(a:file)
+  if bnr == -1
+    execute 'badd ' . a:file
+    let bnr = bufnr(a:file)
+  endif
+  execute 'buffer! ' . bnr
+
+endfunction
+
 " {{{1 s:toc_toggle_numbers
 function! s:toc_toggle_numbers()
   if b:toc_numbers