vim/vim-gnupg
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Clear undo history as the last step of BufReadCmd

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After opening a file, an immediate "u"/":undo" would remove the entire
contents of the buffer.  Even worse, this would not set 'modified', so there
would be no indication that wasn't the actual initial state of the buffer.

Discarding undo history for a buffer requires a few steps, including making a
change.  Luckily, a change is already being made (deleting the extra line left
after ":r !" the decrypted file), so discarding undo history can piggy-back on
top of that.

Signed-off-by: James McCoy <vega.james@gmail.com>
This commit is contained in:
James McCoy 2012-05-30 21:02:40 -04:00
parent f04de4883c
commit 39e54fbd96
1 changed files with 19 additions and 1 deletions
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plugin/gnupg.vim
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@ -1,5 +1,5 @@
" Name: gnupg.vim
" Last Change: 2011 Nov 23
" Last Change: 2012 May 30
" Maintainer: James McCoy <vega.james@gmail.com>
" Original Author: Markus Braun <markus.braun@krawel.de>
" Summary: Vim plugin for transparent editing of gpg encrypted files.
@ -453,15 +453,33 @@ function s:GPGDecrypt()
call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGDecrypt()")
endfunction
" Function: s:GPGBufReadPost() {{{2
"
" Handle functionality specific to opening a file for reading rather than
" reading the contents of a file into a buffer
"
function s:GPGBufReadPost()
call s:GPGDebug(3, ">>>>>>>> Entering s:GPGBufReadPost()")
" In order to make :undo a no-op immediately after the buffer is read,
" we need to do this dance with 'undolevels'. Actually discarding the undo
" history requires performing a change after setting 'undolevels' to -1 and,
" luckily, we have one we need to do (delete the extra line from the :r
" command)
let levels = &undolevels
set undolevels=-1
silent 1delete
let &undolevels = levels
" call the autocommand for the file minus .gpg$
execute ':doautocmd BufReadPost ' . fnameescape(expand('<afile>:r'))
call s:GPGDebug(2, 'called autocommand for ' . fnameescape(expand('<afile>:r')))
call s:GPGDebug(3, "<<<<<<<< Leaving s:GPGBufReadPost()")
endfunction
" Function: s:GPGBufWritePre() {{{2
"
" Handle functionality specific to saving an entire buffer to a file rather
" than saving a partial buffer
"
function s:GPGBufWritePre()
call s:GPGDebug(3, ">>>>>>>> Entering s:GPGBufWritePre()")
" call the autocommand for the file minus .gpg$