X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/086349813284211ede63430b03f8278143b2ab4f..838c1b5aec17ad90a894f21c12bb58adb5225276:/IkiWiki/Plugin/teximg.pm diff --git a/IkiWiki/Plugin/teximg.pm b/IkiWiki/Plugin/teximg.pm index 957f71a6e..3d6fa9942 100644 --- a/IkiWiki/Plugin/teximg.pm +++ b/IkiWiki/Plugin/teximg.pm @@ -8,13 +8,56 @@ use strict; use Digest::MD5 qw(md5_hex); use File::Temp qw(tempdir); use HTML::Entities; -use IkiWiki 2.00; - -sub import { #{{{ +use Encode; +use IkiWiki 3.00; + +my $default_prefix = < "getsetup", id => "teximg", call => \&getsetup); hook(type => "preprocess", id => "teximg", call => \&preprocess); -} #}}} - -sub preprocess (@) { #{{{ +} + +sub getsetup () { + return + plugin => { + safe => 1, + rebuild => undef, + section => "widget", + }, + teximg_dvipng => { + type => "boolean", + description => "Should teximg use dvipng to render, or dvips and convert?", + safe => 0, + rebuild => undef, + }, + teximg_prefix => { + type => "string", + example => $default_prefix, + description => "LaTeX prefix for teximg plugin", + safe => 0, # Not sure how secure LaTeX is... + rebuild => 1, + }, + teximg_postfix => { + type => "string", + example => $default_postfix, + description => "LaTeX postfix for teximg plugin", + safe => 0, # Not sure how secure LaTeX is... + rebuild => 1, + }, +} + +sub preprocess (@) { my %params = @_; my $height = $params{height}; @@ -27,18 +70,12 @@ sub preprocess (@) { #{{{ my $code = $params{code}; if (! defined $code && ! length $code) { - return "[[teximg ".gettext("missing tex code"). "]]"; - } - - if (check($code)) { - return create($code, check_height($height), \%params); - } - else { - return "[[teximg ".gettext("code includes disallowed latex commands"). "]]"; + error gettext("missing tex code"); } -} #}}} + return create($code, check_height($height), \%params); +} -sub check_height ($) { #{{{ +sub check_height ($) { # Since latex doesn't support unlimited scaling this function # returns the closest supported size. my $height =shift; @@ -55,9 +92,9 @@ sub check_height ($) { #{{{ } } return $ret; -} #}}} +} -sub create ($$$) { #{{{ +sub create ($$$) { # This function calls the image generating function and returns # the for the generated image. my $code = shift; @@ -68,116 +105,87 @@ sub create ($$$) { #{{{ $height = 12; } - my $digest = md5_hex($code, $height); + my $digest = md5_hex(Encode::encode_utf8($code), $height); - my $teximgdir = "/teximag"; - my $imglink = "$teximgdir/$digest.png"; - my $imglog = "$teximgdir/$digest.log"; - will_render($params->{destpage}, $imglink); - will_render($params->{destpage}, $imglog); + my $imglink= $params->{page} . "/$digest.png"; + my $imglog = $params->{page} . "/$digest.log"; + will_render($params->{page}, $imglink); + will_render($params->{page}, $imglog); - my $imgurl; - my $logurl; - if (! $params->{preview}) { - $imgurl = urlto($imglink, $params->{destpage}); - $logurl = urlto($imglog, $params->{destpage}); - } - else { - $imgurl="$config{url}/$teximgdir/$digest.png"; - $logurl="$config{url}/$teximgdir/$digest.log"; - } + my $imgurl=urlto($imglink, $params->{destpage}); + my $logurl=urlto($imglog, $params->{destpage}); if (-e "$config{destdir}/$imglink" || - gen_image($code, $height, $digest, $teximgdir)) { + gen_image($code, $height, $digest, $params->{page})) { return qq{} .(exists $params->{alt} ? $params->{alt} : encode_entities($code)) .qq{}; } else { - return qq{[[teximg }.gettext("failed to generate image from code")."]]"; + error qq{}.gettext("failed to generate image from code").""; } -} #}}} +} -sub gen_image ($$$$) { #{{{ +sub gen_image ($$$$) { # Actually creates the image. my $code = shift; my $height = shift; my $digest = shift; my $imagedir = shift; - #TODO This should move into the setup file. - my $tex = '\documentclass['.$height.'pt]{scrartcl}'; - $tex .= '\usepackage[version=3]{mhchem}'; - $tex .= '\usepackage{amsmath}'; - $tex .= '\usepackage{amsfonts}'; - $tex .= '\usepackage{amssymb}'; - $tex .= '\pagestyle{empty}'; - $tex .= '\begin{document}'; - $tex .= '$$'.$code.'$$'; - $tex .= '\end{document}'; + if (!defined $config{teximg_prefix}) { + $config{teximg_prefix} = $default_prefix; + } + if (!defined $config{teximg_postfix}) { + $config{teximg_postfix} = $default_postfix; + } + if (!defined $config{teximg_dvipng}) { + $config{teximg_dvipng} = length `which dvipng 2>/dev/null`; + } + + my $tex = $config{teximg_prefix}; + $tex .= '\['.$code.'\]'; + $tex .= $config{teximg_postfix}; + $tex =~ s!\\documentclass{article}!\\documentclass[${height}pt]{article}!g; + $tex =~ s!\\documentclass{scrartcl}!\\documentclass[${height}pt]{scrartcl}!g; my $tmp = eval { create_tmp_dir($digest) }; if (! $@ && writefile("$digest.tex", $tmp, $tex) && - system("cd $tmp; latex --interaction=nonstopmode $tmp/$digest.tex > /dev/null") == 0 && - system("dvips -E $tmp/$digest.dvi -o $tmp/$digest.ps 2> $tmp/$digest.log") == 0 && + system("cd $tmp; shell_escape=f openout_any=p openin_any=p latex --interaction=nonstopmode $digest.tex < /dev/null > /dev/null") == 0 && # ensure destination directory exists writefile("$imagedir/$digest.png", $config{destdir}, "") && - system("convert -density 120 -trim -transparent \"#FFFFFF\" $tmp/$digest.ps $config{destdir}/$imagedir/$digest.png > $tmp/$digest.log") == 0) { + (($config{teximg_dvipng} && + system("dvipng -D 120 -bg Transparent -T tight -o $config{destdir}/$imagedir/$digest.png $tmp/$digest.dvi > $tmp/$digest.log") == 0 + ) || (!$config{teximg_dvipng} && + system("dvips -E $tmp/$digest.dvi -o $tmp/$digest.ps 2> $tmp/$digest.log") == 0 && + system("convert -density 120 -trim -transparent \"#FFFFFF\" $tmp/$digest.ps $config{destdir}/$imagedir/$digest.png > $tmp/$digest.log") == 0 + ))) { return 1; } else { # store failure log - my $log; + my $log=""; { - open(my $f, '<', "$tmp/$digest.log"); - local $/=undef; - $log = <$f>; - close($f); + if (open(my $f, '<', "$tmp/$digest.log")) { + local $/=undef; + $log = <$f>; + close($f); + } } writefile("$digest.log", "$config{destdir}/$imagedir", $log); return 0; } -} #}}} +} -sub create_tmp_dir ($) { #{{{ +sub create_tmp_dir ($) { # Create a temp directory, it will be removed when ikiwiki exits. my $base = shift; my $template = $base.".XXXXXXXXXX"; my $tmpdir = tempdir($template, TMPDIR => 1, CLEANUP => 1); return $tmpdir; -} #}}} - -sub check ($) { #{{{ - # Check if the code is ok - my $code = shift; - - my @badthings = ( - qr/\$\$/, - qr/\\include/, - qr/\\includegraphic/, - qr/\\usepackage/, - qr/\\newcommand/, - qr/\\renewcommand/, - qr/\\def/, - qr/\\input/, - qr/\\open/, - qr/\\loop/, - qr/\\errorstopmode/, - qr/\\scrollmode/, - qr/\\batchmode/, - qr/\\read/, - qr/\\write/, - ); - - foreach my $thing (@badthings) { - if ($code =~ m/$thing/ ) { - return 0; - } - } - return 1; -} #}}} +} 1