" Vim plugin file
" Original Maintainer:
"		Key fingerprint = C456 1350 085F A320 C6C8 8A36 0F15 9B2E EB12 3885
"		http://jarp.does.notwork.org/diary/200604a.html#20060403
" Patch Maintainer:
"		G-HAL <G-HAL fenix.ne.jp>
" Last Change:	2006 Aug 16 Wed - 2006 Aug 19 Sat, 22 Tue - 24 Thu, 2010 Jan 27 Wed - 29 Fri
" Remark:	Auto-save the Session and Auto-resume
"		~/.vim/plugin/sessionsaver.vim
"
" Note:
"	 If you don't want to resume from session file automatically,
"		let g:no_resume = 1
"	And if you want to resume with override g:no_resume,
"		let g:force_resume_last = 1
"	or
"		let g:force_resume_current = 1
"
"	 If you don't want to make session file automatically,
"		let g:no_suspend = 1
"	 Example:
"		alias vimtmp 'vim --cmd "let g:no_resume = 1" --cmd "let g:no_suspend = 1"'
"
"	 The permission of session file would be 0644.
"	It's readable by other users.
"	#  The permission of viminfo file is 0600,
"	# but session file is not and could not change. Why?
"
" Bugs:
"	 Can't resume syntax mode in split window mode.
"	It's maybe bug of vim.
"
"	 For example:
"	You are editing ~/.vimrc and you split the file into two window.
"	Session file have these line:
"
"	(skip)
"	if &syntax != 'vim'
"	setlocal syntax=vim
"	endif
"	(skip)
"	wincmd w
"	(skip)
"	if &syntax != 'vim'
"	setlocal syntax=vim
"	endif
"	(skip)
"
"	 Upper window has vim mode and lower window has vim mode too.
"	Vim have skipped "setlocal syntax" in lower window,
"	but it's applied to upper window, too.
"	Because two window have been linked to same file.
"

if exists("loaded_sessionsaver") || !has("autocmd")
  finish
endif
let loaded_sessionsaver = 1

"if exists("g:cur_session")
"  let s:cur_session = g:cur_session
"else
"  let s:cur_session = expand("./Session.vim")
"endif
if exists("g:last_sessioninfo")
  let s:last_sessioninfo = g:last_sessioninfo
else
  if exists("g:force_resume_current") && filereadable("./LastSession.viminfo")
    let s:last_sessioninfo = expand("./LastSession.viminfo")
  else
    let s:last_sessioninfo = expand("~/.vim/tmp/viminfo")
  endif
endif
if exists("g:last_sessionfile")
  let s:last_sessionfile = g:last_sessionfile
else
  if exists("g:force_resume_current") && filereadable("./LastSession.vim")
    let s:last_sessionfile = expand("./LastSession.vim")
    let s:last_sessioninfo = expand("./LastSession.viminfo")
  else
    let s:last_sessionfile = expand("~/.vim/tmp/last_session.vim")
  endif
endif
if exists("g:force_resume_last") || exists("g:force_resume_current")
  unlet g:no_resume
endif


augroup SessionSaver
augroup END

if (argc() == 0) && (expand("%:p") == "") && (&viminfo != "") && !exists("g:no_resume")

   " RECOMMEND:
   "	 Don't use auto-resume from session file in current directory
   "	by security reason.
"  if filereadable(s:cur_session)
"    augroup SessionSaver
"      au VimEnter *	execute "source " . s:cur_session
"    augroup END
"  else

  if filereadable(s:last_sessionfile) && filereadable(s:last_sessioninfo)
    au SessionSaver VimEnter *	if (argc() == 0) && (expand("%:p") == "") && (&viminfo != "") && !exists("g:no_resume") | execute "source " . s:last_sessionfile | execute "rviminfo " . s:last_sessioninfo | echom "Session '". s:last_sessionfile ."' and Info '". s:last_sessioninfo ."' was resumed." | endif
    "	vim -S した場合、~/.vim/after/plugin より後、au VimEnter より前、に
    "	読み込まれる。
    "	vim -S した場合はレジュームしない様にするには、
    "	au VimEnter で if 判定するしかない。
  elseif filereadable(s:last_sessionfile)
    au SessionSaver VimEnter *	if (argc() == 0) && (expand("%:p") == "") && (&viminfo != "") && !exists("g:no_resume") | execute "source " . s:last_sessionfile | echom "Session '". s:last_sessionfile ."' was resumed." | endif
    "	vim -S した場合、~/.vim/after/plugin より後、au VimEnter より前、に
    "	読み込まれる。
    "	vim -S した場合はレジュームしない様にするには、
    "	au VimEnter で if 判定するしかない。
  elseif filereadable(s:last_sessioninfo)
    au SessionSaver VimEnter *	if (argc() == 0) && (expand("%:p") == "") && (&viminfo != "") && !exists("g:no_resume") | execute "rviminfo " . s:last_sessioninfo | echom "Info '". s:last_sessioninfo ."' was resumed." | endif
  else
  endif

endif

let s:session_changed = 0
au SessionSaver InsertEnter *	let s:session_changed = 1 | au! SessionSaver InsertEnter *

if exists("g:force_resume_current")
  au SessionSaver VimLeave *	if (expand("%:p") != "") && (&viminfo != "") && !exists("g:no_suspend") && (1 == s:session_changed) | execute "mksession! " . s:last_sessionfile | execute "wviminfo! " . s:last_sessioninfo | endif
else
  au SessionSaver VimLeave *	if (expand("%:p") != "") && (&viminfo != "") && !exists("g:no_suspend") && (1 == s:session_changed) | execute "mksession! " . s:last_sessionfile | endif
endif
"	ユーザが直前に mks していた場合は、自動 mks したくないのだが、
"	判定ルーチンを書くのが面倒。

" [ End of File ]