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+" Vim indent file
+" Language:     LaTeX
+" Maintainer:   Johannes Tanzler <jtanzler@yline.com>
+" Created:      Sat, 16 Feb 2002 16:50:19 +0100
+" Last Change:	Sun, 17 Feb 2002 00:09:11 +0100
+" Last Update:  18th feb 2002, by LH :
+"               (*) better support for the option
+"               (*) use some regex instead of several '||'.
+" Version: 0.02
+" URL: comming soon: http://www.unet.univie.ac.at/~a9925098/vim/indent/tex.vim
+
+" --> If you're a Vim guru & and you find something that could be done in a
+"     better (perhaps in a more Vim-ish or Vi-ish) way, please let me know! 
+
+" Options: {{{
+"
+" To set the following options (ok, currently it's just one), add a line like
+"   let g:tex_indent_items = 1
+" to your ~/.vimrc.
+"
+" * g:tex_indent_items
+"
+"   If this variable is set, item-environments are indented like Emacs does
+"   it, i.e., continuation lines are indented with a shiftwidth.
+"   
+"   NOTE: I've already set the variable below; delete the corresponding line
+"   if you don't like this behaviour.
+"
+"   Per default, it is unset.
+"   
+"              set                                unset
+"   ----------------------------------------------------------------
+"       \begin{itemize}                      \begin{itemize}  
+"         \item blablabla                      \item blablabla
+"           bla bla bla                        bla bla bla  
+"         \item blablabla                      \item blablabla
+"           bla bla bla                        bla bla bla  
+"       \end{itemize}                        \end{itemize}    
+"
+"
+"   This option applies to itemize, description, enumerate, and
+"   thebibliography.
+"
+" }}} 
+
+" Delete the next line to avoid the special indention of items
+if !exists("g:tex_indent_items")
+  let g:tex_indent_items = 1
+endif
+
+if exists("b:did_indent") | finish
+endif
+let b:did_indent = 1
+
+
+setlocal indentexpr=GetTeXIndent()
+setlocal nolisp
+setlocal nosmartindent
+setlocal autoindent
+setlocal indentkeys+=},=\\item,=\\bibitem
+
+
+" Only define the function once
+if exists("*GetTeXIndent") | finish
+endif
+
+
+
+function GetTeXIndent()
+
+  " Find a non-blank line above the current line.
+  let lnum = prevnonblank(v:lnum - 1)
+
+  " At the start of the file use zero indent.
+  if lnum == 0 | return 0 
+  endif
+
+  let ind = indent(lnum)
+  let line = getline(lnum)             " last line
+  let cline = getline(v:lnum)          " current line
+
+  " Do not change indentation of commented lines.
+  if line =~ '^\s*%'
+    return ind
+  endif
+
+  " Add a 'shiftwidth' after beginning of environments.
+  " Don't add it for \begin{document} and \begin{verbatim}
+  ""if line =~ '^\s*\\begin{\(.*\)}'  && line !~ 'verbatim' 
+  " LH modification : \begin does not always start a line
+  if line =~ '\\begin{\(.*\)}'  && line !~ 'verbatim' 
+        \ && line !~ 'document'
+
+    let ind = ind + &sw
+
+    if g:tex_indent_items == 1
+      " Add another sw for item-environments
+      if line =~ 'itemize\|description\|enumerate\|thebibliography'
+        let ind = ind + &sw
+      endif
+    endif
+  endif
+
+  
+  " Subtract a 'shiftwidth' when an environment ends
+  if cline =~ '^\s*\\end' && cline !~ 'verbatim' 
+        \&& cline !~ 'document'
+
+    if g:tex_indent_items == 1
+      " Remove another sw for item-environments
+      if cline =~ 'itemize\|description\|enumerate\|thebibliography'
+        let ind = ind - &sw
+      endif
+    endif
+
+    let ind = ind - &sw
+  endif
+
+  
+  " Special treatment for 'item'
+  " ----------------------------
+  
+  if g:tex_indent_items == 1
+
+    " '\item' or '\bibitem' itself:
+    if cline =~ '^\s*\\\(bib\)\=item' 
+      let ind = ind - &sw
+    endif
+
+    " lines following to '\item' are intented once again:
+    if line =~ '^\s*\\\(bib\)\=item' 
+      let ind = ind + &sw
+    endif
+
+  endif
+
+  return ind
+endfunction
+