Add preview window support

Generalizes the approach so that the function doesn't need logic to
handle split, preview, etc. Also no longer results in the cursor being
moved to beginning of the function call (or record/macro after #15) in
the original buffer.

Author: ches

plugin/vim-erlang-tags.vim

@@ -50,25 +50,27 @@ endfunction
 
 command! ErlangTags call VimErlangTags()
 
-function! VimErlangTagsSelect(split)
-    if a:split
-        split
-    endif
+" Execute the given tag lookup for current word, where 'iskeyword' is
+" temporarily set such that modules, records, and macros are included.
+function! s:GoToErlangTag(cmd)
     let orig_isk = &isk
-    set isk+=:
-    normal "_vawo
-    if getline('.')[col('.') - 2] =~# '[#?]'
-        normal h
-    endif
+    set isk+=:,#,?
+    execute a:cmd expand('<cword>')
     let &isk = orig_isk
 endfunction
 
 function! VimErlangTagsDefineMappings()
-    nnoremap <buffer> <c-]>         :call VimErlangTagsSelect(0)<cr><c-]>
-    nnoremap <buffer> g<LeftMouse>  :call VimErlangTagsSelect(0)<cr><c-]>
-    nnoremap <buffer> <c-LeftMouse> :call VimErlangTagsSelect(0)<cr><c-]>
-    nnoremap <buffer> g]            :call VimErlangTagsSelect(0)<cr>g]
-    nnoremap <buffer> g<c-]>        :call VimErlangTagsSelect(0)<cr>g<c-]>
-    nnoremap <buffer> <c-w><c-]>    :call VimErlangTagsSelect(1)<cr><c-]>
-    nnoremap <buffer> <c-w>]        :call VimErlangTagsSelect(1)<cr><c-]>
+    nnoremap <buffer> <c-]>         :<C-U>call <SID>GoToErlangTag('tag')<cr>
+    nnoremap <buffer> g<LeftMouse>  :<C-U>call <SID>GoToErlangTag('tag')<cr>
+    nnoremap <buffer> <c-LeftMouse> :<C-U>call <SID>GoToErlangTag('tag')<cr>
+    nnoremap <buffer> g]            :<C-U>call <SID>GoToErlangTag('tselect')<cr>
+    nnoremap <buffer> g<c-]>        :<C-U>call <SID>GoToErlangTag('tjump')<cr>
+    nnoremap <buffer> <c-w><c-]>    :<C-U>call <SID>GoToErlangTag('stag')<cr>
+    nnoremap <buffer> <c-w>]        :<C-U>call <SID>GoToErlangTag('stag')<cr>
+    nnoremap <buffer> <c-w>g]       :<C-U>call <SID>GoToErlangTag('stselect')<cr>
+    nnoremap <buffer> <c-w>g<c-]>   :<C-U>call <SID>GoToErlangTag('stjump')<cr>
+    nnoremap <buffer> <c-w>}        :<C-U>call <SID>GoToErlangTag('ptag')<cr>
+    nnoremap <buffer> <c-w>g}       :<C-U>call <SID>GoToErlangTag('ptjump')<cr>
 endfunction
+
+" vim:set expandtab sw=4 ts=4: