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|
##
## File: webtex.perl by Ross Moore <ross@mpce.mq.edu.au>
##
#################################################################
##
## work done at the Geometry Center, University of Minnesota
## commenced during a visit to:
##
## The National Science Foundation,
## Science and Technology Research Center for the
## Computation and Visualization of Geometric Structures
## funded by NSF/DMS89-20161
##
#################################################################
package main;
#
# configuration variable defaults
$WEBEQ_OLD = 1 unless $WEBEQ_OLD; # default until new version is available
$WEBEQ_MML_ONLY = '' unless $WEBEQ_MML_ONLY;
$WEBEQ_APP_ONLY = '' unless $WEBEQ_APP_ONLY;
$WEBEQ_IMG_ONLY = '' unless $WEBEQ_IMG_ONLY;
$WEBEQ_APPMML = 1 unless ($WEBEQ_APPMML);
$WEBEQ_NOIMG = '' unless ($WEBEQ_NOIMG);
# Package options
sub do_webtex_old { $WEBEQ_OLD = 1; }
sub do_webtex_new { $WEBEQ_OLD = ''; }
sub do_webtex_mmlonly { $WEBEQ_MML_ONLY = 1;
$WEBEQ_IMG_ONLY = $WEBEQ_APP_ONLY = ''; }
sub do_webtex_apponly { $WEBEQ_APP_ONLY = 1;
$WEBEQ_MML_ONLY = $WEBEQ_IMG_ONLY = ''; }
sub do_webtex_imgonly { $WEBEQ_IMG_ONLY = 1;
$WEBEQ_MML_ONLY = $WEBEQ_APP_ONLY = ''; }
sub do_webtex_mmlapp { $WEBEQ_APPMML = 0; $WEBEQ_IMG_ONLY = ''; }
sub do_webtex_appmml { $WEBEQ_APPMML = 1; $WEBEQ_IMG_ONLY = ''; }
sub do_webtex_noimg { $WEBEQ_NOIMG = 1; $WEBEQ_IMG_ONLY = ''; }
sub do_webtex_white { $WEBEQ_BKG = 'ffffff'; }
sub do_webtex_text { $WEBEQ_MIME = ' TYPE="text/mathml"'; }
sub do_webtex_application { $WEBEQ_MIME = ' TYPE="application/mathml"'; }
## Mathematics environments
#
# Inline math, $...$
#
sub do_env_tex2html_wrap_inline {
local($_) = @_;
local($math_mode, $failed, $labels, $comment) = ("inline",'','');
$failed = (/$htmlimage_rx|$htmlimage_pr_rx/); # force an image
local($attribs, $border, $web_failed, $alt_math);
if (s/$htmlborder_rx//o) { $attribs = $2; $border = (($4)? "$4" : 1) }
elsif (s/$htmlborder_pr_rx//o) { $attribs = $2; $border = (($4)? "$4" : 1) }
local($saved) = $_;
s/(^\s*(\$|\\\()\s*|\s*(\$|\\\))\s*$)//g; # remove the \$ signs or \(..\)
($labels, $comment, $alt_math) = &process_math_env($math_mode,$_);
$comment =~ s/^\n//; # remove the leading \n
($web_failed, $_) = &convert_to_webtex('inline',$saved,$alt_math);
if ($failed) {
$_ = join ('', $labels, $comment
, &process_undefined_environment("tex2html_wrap_inline", $id, $saved));
} else { $_ = join('', $labels, $comment, $_); }
if ($border||($attribs)) {
&make_table( $border, $attribs, '', '', '', $_ )
} else { $_ }
}
sub do_env_displaymath {
local($_) = @_;
local($math_mode, $failed, $labels, $comment) = ("display",'','');
$failed = (/$htmlimage_rx|$htmlimage_pr_rx/); # force an image
local($attribs, $border);
if (s/$htmlborder_rx//o) { $attribs = $2; $border = (($4)? "$4" : 1) }
elsif (s/$htmlborder_pr_rx//o) { $attribs = $2; $border = (($4)? "$4" : 1) }
local($saved) = $_;
local($halign) = $math_class unless $FLUSH_EQN;
local($sbig,$ebig,$web_failed);
($sbig,$ebig) = ('<BIG>','</BIG>')
if (($DISP_SCALE_FACTOR)&&($DISP_SCALE_FACTOR >= 1.2 ));
($labels, $comment, $alt_math) = &process_math_env($math_mode,$_);
($web_failed, $_) = &convert_to_webtex('display',$saved,$alt_math);
if ($failed) {
$_ = &process_undefined_environment("displaymath", $id, $saved);
s/^[ \t]*\n?/\n/; s/\n?[ \t]*$/\n/;
$_ = (($comment.$labels)? "$comment$labels\n":''). $_;
} else {
s/^[ \t]*\n?/\n/; s/\n?[ \t]*$/\n/;
$_ = (($comment.$labels)? "$comment$labels\n":'').$sbig.$_.$ebig;
}
if ($border||($attribs)) {
join('',"<BR>\n<DIV$math_class>\n"
, &make_table( $border, $attribs, '', '', '', $_ )
, "</DIV>\n<BR CLEAR=\"ALL\">");
} else {
join('',"<BR><P></P>\n<DIV$math_class>",$_
,"</DIV><BR CLEAR=\"ALL\">\n<P></P>");
}
}
sub convert_to_webtex {
local($mode,$orig,$no_applet) = @_;
print "\nWebTeX:$mode:". ($WEBEQ_NOIMG ? 'no' : 'with')
. ' images' . ($WEBEQ_IMG_ONLY ? ' only' : '') . "\n$_\n"
if ($VERBOSITY > 1);
if($WEBEQ_IMG_ONLY) { return (1,$no_applet) };
local($savedRS, $failed, $env_id, $_) = ($/,'','',$orig);
$/='';
if ($mode =~ /inline/) {
if (/^\s*\\\(/) { $failed = 1 }
else {
$_ = &revert_to_raw_tex($_);
$_ =~ s/^\s*\$?/\$/sm;
$_ =~ s/\$?$/\$/sm;
$env_id .= $WEBEQ_INL if $USING_STYLES;
}
} elsif ($mode =~ /display/) {
if (/^\s*\$\$/) { $failed = 1 }
else {
$_ = &revert_to_raw_tex($_);
$_ =~ s/^\s*(\\\[|\$\$)?/\\\[/sm;
$_ =~ s/(\$\$|\\\])?\s*$/\\\]/sm;
$env_id .= $WEBEQ_DIS if $USING_STYLES;
}
} else {
print " *** Unknown WebTeX mode, no applet ***";
$/ = $savedRS;
return (0,$no_applet)
}
$/ = $savedRS;
return (0,$no_applet) if $failed;
($failed,$_) = &check_only_webtex($_);
return (0,$no_applet) if $failed;
local($webeq_abbrev);
SWITCH: {
if ($WEBEQ_IMG_ONLY) { $webeq_abbrev = ''; last SWITCH; };
if ($WEBEQ_MML_ONLY) { $webeq_abbrev = 'MML'; last SWITCH; };
if ($WEBEQ_APP_ONLY) { $webeq_abbrev = 'APP'; last SWITCH; };
if ($WEBEQ_APPMML) { $webeq_abbrev = 'APPMML'; last SWITCH; }
else { $webeq_abbrev = 'MMLAPP'; last SWITCH; }
};
$webeq_abbrev .= (($WEBEQ_NOIMG || $WEBEQ_MML_ONLY) ? ':' : 'IMG:' );
local($uucontents) = &encode(&addto_encoding('webeq'.$mode.$webeq_abbrev,$_));
# local($cached) = $WEBEQ_CACHE{$uucontents};
local($cached) = $cached_env_image{$uucontents};
if ($cached) {
$_ = $cached;
} else {
$verbatim{++$global{'verbatim_counter'}} = $_;
local($verb_math) = join("",$verbatim_mark
, 'verbatim',$global{'verbatim_counter'},'#');
# don't bother making an image, use LaTeX2HTML's one
$WEBEQ_IMG = $WEBEQ_NONE;
++$WEBEQ_CTR;
local($WEBEQ_CMD);
local($WEBEQ_PRE) = "wbq${WEBEQ_CTR}"
. (($WEBEQ_OLD &&(!$WEBEQ_IMG eq $WEBEQ_NONE))? 'a':'');
local($wbq_src) = $WEBEQ_PRE.'.src';
local($out_app) = $WEBEQ_PRE.'.app';
local($out_tag) = $WEBEQ_PRE.'.tag';
local($out_jpg) = $WEBEQ_PRE.'1.jpg';
local($out_png) = $WEBEQ_PRE.'1.png';
local($out_mml) = $WEBEQ_PRE.'.mml';
local($out_err) = $WEBEQ_PRE.'.err';
local($mml_tag, $app_tag, $ewebeq) = ('','','</NOEMBED>');
# local($WEBEQ_IMG) = (($IMAGE_TYPE =~ /png/) ? $WEBEQ_PNG : $WEBEQ_JPG);
# local($out_img) = (($IMAGE_TYPE =~ /png/) ? $out_png : $out_jpg);
open (SRC , ">$wbq_src");
print SRC $_;
close SRC;
local($eapplet) = '</applet>';
local($snoembed) = "<NOEMBED>\n";
local($enoembed) = '</NOEMBED>';
local($width,$height,$align);
if (!$WEBEQ_APP_ONLY) {
$WEBEQ_CMD = $WEBEQ.$WEBEQ_OPTS.$WEBEQ_MML.$WEBEQ_PARSER.$WEBEQ_IMG
." -errors $out_err -o $out_mml $wbq_src\n";
print "\n$WEBEQ_CMD" if $DEBUG;
if (system $WEBEQ_CMD) {
&webeq_failed($out_mml); $out_mml = '';
} else {
($width,$height,$align) =
&cleanup_mml_attribs($out_mml,$mode,$no_applet);
$mml_tag = join('', '<EMBED SRC="', $out_mml, '"'
, $WEBEQ_MIME , "\n "
, ($height ? " HEIGHT=\"$height\"" : '')
, ($width ? " WIDTH=\"$width\"" : '')
, ' ALIGN="'.($align ? $align : 'MIDDLE').'"'
, ">\n</EMBED>\n");
}
print "\nMATHML:\n$mml_tag\n" if ($DEBUG ||($VERBOSITY>1));
};
if (!$WEBEQ_MML_ONLY) {
$WEBEQ_CMD = $WEBEQ.$WEBEQ_OPTS.$WEBEQ_APP.$WEBEQ_IMG.$WEBEQ_PARSER
." -imgtype none -errors $out_err -o $out_tag $wbq_src\n";
print "\n$WEBEQ_CMD" if $DEBUG;
if (system $WEBEQ_CMD) {
$_ = $no_applet;
&webeq_failed($out_tag); $out_tag = '';
} else {
open(TAG, "<$out_tag");
binmode TAG;
$app_tag = join('',<TAG>);
close(TAG);
# replace webeq fall-back image by LaTeX2HTML's own, or none at all
# $app_tag =~ s/<img[^>]*>/($WEBEQ_NOIMG ? '' : $no_applet)/e;
# $app_tag =~ s|(\n?</applet>)\s*|($WEBEQ_NOIMG ? '' : $no_applet).$1|e;
if ($mode =~ /display/) {
# remove initial space, line-ends and HTML tags
$app_tag =~ s/^\s*(<P><CENTER>)?//s;
$app_tag =~ s|(</CENTER><P>)?\s*$||s;
}
# cleanup blank lines
$app_tag =~ s/\n[ \t]*\n/\n/sg;
local($code);
$app_tag =~ s/(<param[^"\n]*name=eq value=")([^"]*)(">)/
$code = $2;
$code =~ s|[<>"&]|'&'.$html_special_entities{$&}.';'|eg;
$verbatim{++$global{'verbatim_counter'}} = $code;
join("", $1, $verbatim_mark
, 'rawhtml', $global{'verbatim_counter'},'#',$3)/e;
}
}
SWITCH: {
if ($WEBEQ_MML_ONLY) {
return (0,$no_applet) unless $mml_tag;
$_ = $mml_tag . $snoembed . $enoembed;
last SWITCH }
if ($WEBEQ_APP_ONLY) {
return (0,$no_applet) unless $app_tag;
$_ = $app_tag;
last SWITCH }
if ($WEBEQ_APPMML) {
$_ = $app_tag;
$_ =~ s/(\Q$eapplet\E)\s*$/$mml_tag$snoembed$enoembed$1/;
last SWITCH;
} else {
$_ = join('', $mml_tag
, $snoembed, $app_tag , $enoembed );
last SWITCH;
}
}
if (($WEBEQ_IMG eq $WEBEQ_NONE)&&(!$WEBEQ_NOIMG)) {
# insert the fall-back material
$_ =~ s/((\s*($eapplet|$enoembed))+)\s*$/$no_applet$1/;
} elsif ($WEBEQ_NOIMG) {
$_ =~ s/$snoembed\s*$enoembed//g;
}
if ($HTML_VERSION >= 4.0) {
# use <OBJECT> tag, not the deprecated <APPLET> tag
$_ =~ s/^\s*<(APPLET|EMBED)/<OBJECT$env_id/igs;
# $_ =~ s/<(APPLET|EMBED)/<OBJECT$env_id/igs;
$_ =~ s/<\/(APPLET|(NO)?EMBED)>\s*$/<\/OBJECT>/igs;
$_ =~ s/<\/(OBJECT|EMBED)>\s*<NOEMBED>//g;
$_ =~ s/ SRC=/ DATA=/gi;
$_ =~ s/ NAME=/ ID=/gi;
$_ =~ s/ PLUGINURL=/ CLASSID=/gi;
$_ =~ s/ PLUGINSPAGE=/ CODEBASE=/gi;
print "\nOBJECT:$_\n" if ($DEBUG||($VERBOSITY > 1));
}
# $WEBEQ_CACHE{$uucontents} = $_;
$cached_env_image{$uucontents} = $_ unless $WEBEQ_IMG_ONLY;
} # end of if($cached) { ... } else {
($failed,$_);
}
# check that the only macro-names are those known to WebTeX
sub check_only_webtex {
local($webtex) = @_;
# $webtex =~ s/\'/\\prime /g; # coerce ' --> \prime
(0,$webtex);
}
sub webeq_failed {
local($err_str) = "\n*** WebEQ failed to make image @_[0] ***";
print $err_str."\n" if ($DEBUG || ($VERBOSITY > 1));
&write_warnings($err_str);
}
# early versions of webeq started with <P><CENTER> tags and their ends
# remove these, if they exist.
sub cleanup_mml_attribs {
local($mml_file,$mode,$_) = @_;
local($width,$height,$align);
open (MML, "<$mml_file");
local($mml_code) = join('',<MML>);
close MML;
local($savedRS) = $/; $/='';
$mml_code =~ s/^\s*<P><CENTER>\n?//s;
$mml_code =~ s/\s*<applet code="[^"]*" width=(\d+) height=(\d+) align=(\w+)>\s*/
$width=$1;$height=$2;$align=$3;''/e;
$mml_code =~ s/<param[^>\n]*>?\n//g;
$mml_code =~ s|(\n\">\s*</applet>\s*)?\s*</CENTER><P>\s*||s;
$mml_code =~ s|\n\">\s*</applet>\s*||s;
$mml_code =~ s/\&($WEBEQ_mml_name_rx);/$WEBEQ_mml_name{$1}/eg;
$mml_code =~ s/\&($WEBEQ_mml_punct_rx);/$WEBEQ_mml_punct{$1}/eg;
# catch superscripted primes --- put them into the preceding tag
$mml_code =~ s|<(msup>)\s*<([^>]*>)([^<>]*)</\2\s*<mo>\′</mo>\s*</\1|<$2$3\'</$2|sg;
open (MML, ">$mml_file");
print MML $mml_code;
close MML;
if ($mode =~/display/) {
# webweq has already used a scaling for \displaystyle
if ($width) { $width *= $WEBEQ_TCX_REL_SCALE; $width = int($width + 0.5) }
if ($height) { $height *= $WEBEQ_TCX_REL_SCALE; $height = int($height + 0.5) }
} elsif ($no_applet) {
local($find_width,$find_height,$val) = ($width,$height);
&replace_image_marks;
if (s/(WIDTH|HEIGHT)\s*=\s*"?(\d+)"?/$val=$2;
if ($1 eq 'WIDTH') { $find_width = $val if ($val > $find_width) }
else { $find_height = $val if ($val > $find_height) };''/esg ) {
if (/ALIGN="MIDDLE"/) { $height *= 2; }
else { $height *= $WEBEQ_TCX_INL_SCALE; }
$width *= $WEBEQ_TCX_INL_SCALE;
if ($find_width > $width) { $width = $find_width };
if ($find_height > $height) { $height = $find_height };
} else {
print "\nNo HEIGHT/WIDTH info within: $_ ***";
if ($width) { $width *= $WEBEQ_TCX_INL_SCALE }
if ($height) { $height *= $WEBEQ_TCX_INL_SCALE }
}
} else {
# tech-explorer uses a scaling of roughly 1.5
if ($width) { $width *= $WEBEQ_TCX_INL_SCALE }
if ($height) { $height *= $WEBEQ_TCX_INL_SCALE }
}
$width = 10 + int($width + 0.5) if $width;
$height = 5 + int($height + 0.5) if $height;
($width,$height,$align);
}
# Fix entity-name errors in webeq output
%WEBEQ_mml_name = (
'in' , '∈' #
, 'setminus' , "\\" # ∖
, 'mapsto' , ' - > ' # ∖
, 'times' , ' x ' # ×
, 'rightarrow' , ' -- > ' # &rarrow;
, 'longrightarrow' , ' --- > ' # &rrarrow;
);
$WEBEQ_mml_name_rx = join('|', keys %WEBEQ_mml_name);
%WEBEQ_mml_punct = (
',' , ' ' # ' '
# '.' , '˙' # dot accent
, ':' , ' ' # '&medsp;'
, ';' , ' ' # '&thicksp;'
, '!' , '&negsp;'
, '~' , ' '
# , '`' , '`' # acute accent
# , ''' , ''' # grave -- accent;
# , '"' , '"' # umlaut -- accent;
, '@' , '@'
, '#' , '#'
, '$' , '$'
, '%' , '%'
# , '^' , '^' # caret -- accent;
, '&' , '&'
, '*' , '☆'
, '(' , ''
, ')' , ''
, '-' , ''
, '_' , '_'
, '+' , ''
, '=' , ''
, '=' , ''
, '[' , '['
, ']' , ']'
, '|' , '||' # ‖ or ‖
, '<' , '⟨'
, '>' , '⟩'
, '{' , '{' # {
, '}' , '}' # }
);
$WEBEQ_mml_punct_rx = "\\W";
$WEBEQ_CLASSES = $ENV{'CLASSPATH'};
print " *** no JAVA classes*** \n
please set the CLASSPATH variable\n" unless $WEBEQ_CLASSES;
$WEBEQ_CTR = '';
$WEBEQ = 'java webeq.wizard.clwizard ';
$WEBEQ_OPTS = ' -colorspace colors -quality excellent -linewrap true -allow_selection true ';
$WEBEQ_PARSER = ' -parser WebTeX -delims WebTeX ';
$WEBEQ_PMML = ' -parser MathML -delims MathML ';
$WEBEQ_APP = ' -outtype Applets';
$WEBEQ_IMG = ' -outtype Images_Only';
#$WEBEQ_MML = ' -outtype MathML_Only';
$WEBEQ_MML = ' -outtype MathML_Applets';
$WEBEQ_JPG = ' -imgtype jpeg';
$WEBEQ_PNG = ' -imgtype png';
$WEBEQ_NONE = ' -imgtype none';
$WEBEQ_ERR = ' -errors ';
$WEBEQ_OUT = ' -o ';
#$WEBEQ_MIME = ' TYPE="application/mathml"';
$WEBEQ_MIME = ' TYPE="text/mathml"';
$WEBEQ_JAVA = ' TYPE="application/java"';
$WEBEQ_INL = ' CLASS="INLINE"';
$WEBEQ_DIS = ' CLASS="DISPLAY"';
$WEBEQ_BKG = ' color=#ffffff';
$WEBEQ_TCX_REL_SCALE = 1.2;
$WEBEQ_TCX_INL_SCALE = 1.6;
%WEBEQ_CACHE = ();
&ignore_commands( <<_IGNORED_CMDS_);
_IGNORED_CMDS_
&process_commands_wrap_deferred (<<_RAW_ARG_DEFERRED_CMDS_);
_RAW_ARG_DEFERRED_CMDS_
1;
|
