Added fsize calculation in fileinfo so better tracking can be used to display in tagbar window

autoload/tagbar.vim

@@ -1158,22 +1158,6 @@ function! s:ProcessFile(fname, ftype) abort
         return
     endif
 
-    " If the file size limit it set, then check the file size to see if
-    " this file should be ignored or not.
-    if g:tagbar_file_size_limit > 0
-        let fsize = getfsize(expand('%'))
-        if fsize > g:tagbar_file_size_limit && !exists('b:tagbar_force_update')
-            call tagbar#debug#log('[ProcessFile] File size too large (' . fsize .
-                        \ ' bytes) - limit set to ' . g:tagbar_file_size_limit)
-            if !exists('b:tagbar_file_exceeds_limit')
-                echom 'File size too large (' . fsize .
-                            \ ' bytes) - Not processing file (see help for g:tagbar_file_size_limit).'
-                let b:tagbar_file_exceeds_limit = 1
-            endif
-            return
-        endif
-    endif
-
     let typeinfo = s:known_types[a:ftype]
 
     " If the file has only been updated preserve the fold states, otherwise
@@ -1197,7 +1181,14 @@ function! s:ProcessFile(fname, ftype) abort
 
     call tagbar#debug#log('typeinfo for file to process: ' . string(typeinfo))
 
-    if g:tagbar_use_cache
+    if g:tagbar_file_size_limit > 0
+                \ && fileinfo.fsize > g:tagbar_file_size_limit
+                \ && !exists('b:tagbar_force_update')
+        call tagbar#debug#log('File size exceeds defined limit')
+        let fileinfo.fsize_exceeded = 1
+        call s:known_files.put(fileinfo)
+        return
+    elseif g:tagbar_use_cache
         " Use a temporary files for ctags processing instead of the original one.
         " This allows using Tagbar for files accessed with netrw, and also doesn't
         " slow down Tagbar for files that sit on slow network drives.
@@ -1216,6 +1207,7 @@ function! s:ProcessFile(fname, ftype) abort
             return
         endif
         let fileinfo.mtime = getftime(tempfile)
+        let fileinfo.fsize_exceeded = 0
 
         let ctags_output = s:ExecuteCtagsOnFile(tempfile, a:fname, typeinfo)
 
@@ -1224,6 +1216,7 @@ function! s:ProcessFile(fname, ftype) abort
         endif
     else
         call tagbar#debug#log('File caching disabled')
+        let fileinfo.fsize_exceeded = 0
         let ctags_output = s:ExecuteCtagsOnFile(a:fname, a:fname, typeinfo)
     endif
 
@@ -1864,7 +1857,16 @@ function! s:RenderContent(...) abort
 
     let typeinfo = fileinfo.typeinfo
 
-    if !empty(fileinfo.getTags())
+    if fileinfo.fsize_exceeded == 1
+        if g:tagbar_compact
+            silent 0put ='\" File size [' . fileinfo.fsize . 'B] exceeds limit'
+        else
+            silent put ='\" File size exceeds defined limit'
+            silent put ='\"   File Size [' . fileinfo.fsize . ' bytes]'
+            silent put ='\"   Limit     [' . g:tagbar_file_size_limit . ' bytes]'
+            silent put ='\" Use TagbarForceUpdate override'
+        endif
+    elseif !empty(fileinfo.getTags())
         " Print tags
         call s:PrintKinds(typeinfo, fileinfo)
     else
@@ -3594,13 +3596,12 @@ function! tagbar#Update() abort
     call s:AutoUpdate(fnamemodify(expand('%'), ':p'), 0)
 endfunction
 
-"  tagbar#ForceUpdate() {{{2
+" tagbar#ForceUpdate() {{{2
 function! tagbar#ForceUpdate() abort
     if !exists('b:tagbar_force_update')
         let b:tagbar_force_update = 1
         call s:AutoUpdate(fnamemodify(expand('%'), ':p'), 1)
         unlet b:tagbar_force_update
-        unlet b:tagbar_file_exceeds_limit
     endif
 endfunction
 

autoload/tagbar/prototypes/fileinfo.vim

@@ -9,6 +9,9 @@ function! tagbar#prototypes#fileinfo#new(fname, ftype, typeinfo) abort
     " File modification time
     let newobj.mtime = getftime(a:fname)
 
+    " Get file size
+    let newobj.fsize = getfsize(a:fname)
+
     " The vim file type
     let newobj.ftype = a:ftype
 
@@ -52,6 +55,10 @@ function! tagbar#prototypes#fileinfo#new(fname, ftype, typeinfo) abort
     let newobj.openKindFold = function(s:add_snr('s:openKindFold'))
     let newobj.closeKindFold = function(s:add_snr('s:closeKindFold'))
 
+    " This is used during file processing. If the limit is exceeded at that
+    " point, then mark this flag for displaying to the tagbar window
+    let newobj.fsize_exceeded = 0
+
     return newobj
 endfunction