Add option to show line numbers, closes #146

autoload/tagbar.vim

@@ -1756,14 +1756,25 @@ function! s:InitWindow(autoclose) abort
     setlocal nobuflisted
     setlocal nomodifiable
     setlocal nolist
-    setlocal nonumber
     setlocal nowrap
     setlocal winfixwidth
     setlocal textwidth=0
     setlocal nospell
 
-    if exists('+relativenumber')
-        setlocal norelativenumber
+    if g:tagbar_show_linenumbers == 0
+        setlocal nonumber
+        if exists('+relativenumber')
+            setlocal norelativenumber
+        endif
+    elseif g:tagbar_show_linenumbers == 1
+        setlocal number
+    elseif g:tagbar_show_linenumbers == 2
+        setlocal relativenumber
+    else
+        set number<
+        if exists('+relativenumber')
+            set relativenumber<
+        endif
     endif
 
     setlocal nofoldenable

doc/tagbar.txt

@@ -470,6 +470,23 @@ Example:
         let g:tagbar_show_visibility = 0
 <
 
+                                                   *g:tagbar_show_linenumbers*
+g:tagbar_show_linenumbers~
+Default: 0
+
+Whether line numbers should be shown in the Tagbar window.
+
+Possible values are:
+  0: Don't show any line numbers.
+  1: Show absolute line numbers.
+  2: Show relative line numbers.
+  -1: Use the global line number settings.
+
+Example:
+>
+        let g:tagbar_show_linenumbers = 2
+<
+
                                                              *g:tagbar_expand*
 g:tagbar_expand~
 Default: 0

plugin/tagbar.vim

@@ -58,6 +58,7 @@ let s:options = [
     \ ['indent', 2],
     \ ['left', 0],
     \ ['show_visibility', 1],
+    \ ['show_linenumbers', 0],
     \ ['singleclick', 0],
     \ ['sort', 1],
     \ ['systemenc', &encoding],