Open folds on tag jump

Closes vim-ruby#212.

Author: tpope

ftplugin/ruby.vim

@@ -190,15 +190,16 @@ if !exists("g:no_plugin_maps") && !exists("g:no_ruby_maps")
   endif
 
   if maparg("\<C-]>",'n') == ''
-    nnoremap <silent> <buffer> <C-]>       :<C-U>exe  v:count1."tag <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> g<C-]>      :<C-U>exe         "tjump <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> g]          :<C-U>exe       "tselect <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> <C-W>]      :<C-U>exe v:count1."stag <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> <C-W><C-]>  :<C-U>exe v:count1."stag <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> <C-W>g<C-]> :<C-U>exe        "stjump <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> <C-W>g]     :<C-U>exe      "stselect <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> <C-W>}      :<C-U>exe          "ptag <C-R>=RubyCursorIdentifier()<CR>"<CR>
-    nnoremap <silent> <buffer> <C-W>g}     :<C-U>exe        "ptjump <C-R>=RubyCursorIdentifier()<CR>"<CR>
+    cnoremap <SID>foldopen <Bar>if &foldopen =~# 'tag'<Bar>exe 'norm! zv'<Bar>endif
+    nnoremap <silent> <script> <buffer> <C-]>       :<C-U>exe  v:count1."tag <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> g<C-]>      :<C-U>exe         "tjump <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> g]          :<C-U>exe       "tselect <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> <C-W>]      :<C-U>exe v:count1."stag <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> <C-W><C-]>  :<C-U>exe v:count1."stag <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> <C-W>g<C-]> :<C-U>exe        "stjump <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> <C-W>g]     :<C-U>exe      "stselect <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> <C-W>}      :<C-U>exe          "ptag <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
+    nnoremap <silent> <script> <buffer> <C-W>g}     :<C-U>exe        "ptjump <C-R>=RubyCursorIdentifier()<CR>"<SID>foldopen<CR>
     let b:undo_ftplugin = b:undo_ftplugin
           \."| sil! exe 'nunmap <buffer> <C-]>'| sil! exe 'nunmap <buffer> g<C-]>'| sil! exe 'nunmap <buffer> g]'"
           \."| sil! exe 'nunmap <buffer> <C-W>]'| sil! exe 'nunmap <buffer> <C-W><C-]>'"