Here is a little command I've written (as usual, a wrapper around a Perl script), which naively tries to indent your LaTeX file intelligently. If it succeeds, there are two good side effects. First, your file looks nicer. Second, your file foldings work correctly, as TM is cued by the indentation.

Good luck. Check the file, if you use it. It works for me, your mileage may vary.

I've appended the one-liner version. Since it is a blob of line noise, I also have a link to the latest version of the uncompressed Perl, which is at http://anon:anon@macromates.com/svn/Bundles/trunk/Latex.tmbundle/LaTeXTidy.pl You can put that somewhere and write a command to call it instead.

I suspect anyone with issues with the folding could customize this script for their language if necessary. I know PerlTidy and HTMLTidy exist. I couldn't find a TeXTidy, so I wrote this last year...

- Eric

--

Before: Nothing STDIN: Entire STDOUT: Replace doc

Command:

perl -e 'my$in;while(<STDIN>){$in.=$_;}my@keywords=qw( appendix author bibliography bigskip chapter date def document evensidemargin font headheight headsep include index make new noindent oddsidemargin page paragraph part ragged renew section subsection subsubsection subsubsubsection table textheight textwidth title topmargin use vfil);$in=~s/%(.*?)\n/\n\n%$1\n\n/g;my@pieces=split(/\n\s*\n/,$in);my$string,$keyword;foreach(@pieces){if(/^\s*%/){$string.=$_."\n";next;}s/\s+/ /g;foreach$keyword(@keywords){s/(\$keyword)/\n$1/g;}s/([^\]%)/\n$1/g;s/(\begin{)(.*?)(})/\n$1$2$3\n/g;s/(\end{)(.*?)(})/\n$1$2$3\n/g;s/(\item)(.*?)(\item)/$1$2\n$3/g;s/(\item)/\n$1/g;s/[^\](\[)/\n$1/g;s/(\])/$1\n/g;s/(\\)\s/$1\n/g;s/(\\[)(.*?)(])\s/$1$2$3\n/g;s/\n\s*\n/\n/g;s/^\n//;chomp;$string.=$_."\n\n";}$string=~s/\n\s+\n/\n\n/g;$string=~s/(%[^\n]*)(\)(end)/$1$2{\n\n\n}$3/g;$string=~s/(%[^\n]*)(\)(begin)/$1$2{\n\n\n}$3/g;$string=~s/(\end)/[\n\n\n]$1/g;$string=~s/(\begin)/[\n\n\n]$1/g;@pieces=split(/[\n\n\n]/,$string);my$indent=1;my@lines;my$piece,$i;$string="";foreach$piece(@pieces){$piece=~s/{\n\n\n}//g;$piece=~/^\(.*?){/;if(lc($1)eq"begin"){$indent++;}else{$indent--;}@lines=split(/\n/,$piece);foreach(@lines){s/^\s+//;if(/^\begin/i){for($i=1;$i<=$indent-1;$i++){$string.="\t";}}else{for($i=1;$i<=$indent;$i++){$string.="\t";}}$string.=$_."\n";}}print$string;'