Fix VimwikiRenameLink ruins window layout (Issue #592)

Dockerfile

@@ -21,5 +21,4 @@ RUN install_vim -tag v7.3.429 -name vim_7.3.429 -build \
                 -tag v7.4.1546 -name vim_7.4.1546 -build \
                 -tag v8.0.0027 -name vim_8.0.0027 -build \
                 -tag v8.1.0519 -name vim_8.1.0519 -build \
-+               -tag neovim:v0.2.2 -name nvim_0.2.2 -build \
+                -tag neovim:v0.3.8 -name nvim_0.3.8 -build \
-+               -tag neovim:v0.3.8 -name nvim_0.3.8 -build \

autoload/vimwiki/base.vim

@@ -1734,6 +1734,7 @@ endfunction
 
 " Rename current file, update all links to it
 " Param: [new_filepath <string>]
+" Exported: VimwikiRenameFile
 function! vimwiki#base#rename_link(...) abort
   " Get filename and dir relative to wiki root
   let subdir = vimwiki#vars#get_bufferlocal('subdir')
@@ -1788,25 +1789,22 @@ function! vimwiki#base#rename_link(...) abort
 
   let &buftype='nofile'
 
-  " Save current buffer: [file_name, buffer_name]
+  " Save current buffer: [file_name, previous_name, buffer_number]
-  let cur_buffer = [expand('%:p'), vimwiki#vars#get_bufferlocal('prev_links')]
+  let buf_old_info = [expand('%:p'), vimwiki#vars#get_bufferlocal('prev_links'), bufnr('%')]
+  if v:version > 800 || has('patch-8.0.0083')
+    let win_old_id = win_getid()
+  endif
 
   " Get all wiki buffer
   let blist = s:get_wiki_buffers()
 
-  " Save wiki buffers
+  " Dump wiki buffers: they may change
   for bitem in blist
     execute ':b '.escape(bitem[0], ' ')
     execute ':update'
   endfor
 
-  execute ':b '.escape(cur_buffer[0], ' ')
+  " Prevent prompt from scrolling alone
-
-  " Remove wiki buffers
-  for bitem in blist
-    execute 'bwipeout '.escape(bitem[0], ' ')
-  endfor
-
   let more_save = &more
   setlocal nomore
 
@@ -1820,20 +1818,39 @@ function! vimwiki#base#rename_link(...) abort
         \ fnamemodify(new_fname_rel_dir, ':r')
         \ )
 
-  " Restore wiki buffers
+  "" Restore wiki buffers
+  let autoread_save = &autoread
+  set autoread
   for bitem in blist
-    if !vimwiki#path#is_equal(bitem[0], cur_buffer[0])
+    execute ':b '.escape(bitem[0], ' ')
-      call s:open_wiki_buffer(bitem)
+    execute ':e!'
-    endif
   endfor
+  let &autoread = autoread_save
 
   " Open the new buffer
-  call s:open_wiki_buffer([new_fname, cur_buffer[1]])
+  call s:open_wiki_buffer([new_fname, buf_old_info[1]])
-  " execute 'bwipeout '.escape(cur_buffer[0], ' ')
+  let buf_new_nb = bufnr('%')
+
+  " Change old_buffer by new buffer in all window
+  windo if bufnr('%') == buf_old_info[2] | exe 'b ' . buf_new_nb | endif
+  " Goto the window I belong
+  if v:version > 800 || has('patch-8.0.0083')
+    call win_gotoid(win_old_id)
+  endif
+
+  " Wipeout the old buffer: avoid surprises <= If it is not the same
+  if buf_old_info[2] != buf_new_nb
+    exe 'bwipeout! ' . buf_old_info[2] 
+  else
+    " Should not happen
+    echomsg 'Vimwiki Error: New buffer is the same as old, so will not delete: '
+          \ . buf_new_nb . '.Please open an issue if see this messsage'
+  endif
 
   " Log success
   echomsg 'Vimwiki: '.old_fname.' is renamed to '.new_fname
 
+  " Restore prompt
   let &more = more_save
 endfunction
 

test/command_rename_link.vader

@@ -1,5 +1,6 @@
 # VimwikiRenameFile
 # Related to link, file navigation
+# Many commands are made with Do: They block with Execute
 
 
 # Create directories I remove at end {{{1
@@ -32,6 +33,15 @@ Execute (Create 3 files):
   edit $HOME/testmarkdown/Test-Rename-Completion.md
   call WriteMe()
 
+
+Do (Testing Old buffer has been wiped out {{{2):
+  :edit $HOME/testmarkdown/Test-Rename-Completion.md\<Cr>
+  :let buf_old = bufnr('%')\<Cr>
+  :VimwikiRenameFile Test-Rename-new1\<Cr>
+  :AssertEqual 'Test-Rename-new1', expand('%:t:r')\<Cr>
+  :VimwikiRenameFile Test-Rename-Completion\<Cr>
+  :AssertEqual expand('%'), $HOME . '/testmarkdown/Test-Rename-Completion.md'\<Cr>
+
 Do (Testing Completion {{{2):
 # Rename and test (zzz)
   :VimwikiRenameFile Test-Rename-z\<C-l>1\<Cr>
@@ -45,6 +55,7 @@ Do (Testing transforward {{{2):
   :Log 'Forward: root -> dir1/dir11 {{{3'\<Cr>
 # Create dir1/dir11/Test-Rename and link to it
   :edit $HOME/testmarkdown/Test-Rename-Completion.md\<Cr>
+  ggdG
   idir1/dir11/Test-Rename.md\<Esc>
   \<Cr>\<Cr>
   :VimwikiRenameFile ../Test-Rename-2\<Cr>
@@ -70,9 +81,8 @@ Do (Testing transforward {{{2):
   :VimwikiRenameFile dir1/Test-Rename-Completion-2\<Cr>
   :AssertEqual expand('%'), $HOME . '/testmarkdown/dir1/Test-Rename-Completion-2.md'\<Cr>
 
-# Delete smaller unit changed {{{2
 
-Execute (Clean):
+Execute (Delete smaller unit changed {{{2):
   call DeleteFile('$HOME/testmarkdown/Test-Rename-zzz.md')
   call DeleteFile('$HOME/testmarkdown/dir1/Test-Rename-Completion_2.md')
   call DeleteFile('$HOME/testmarkdown/dir1/Test-Rename-2.md')