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# This file is part of reLyX
# Copyright (c) 1998-9 Amir Karger [email protected]
# You are free to use and modify this code under the terms of
# the GNU General Public Licence version 2 or later.
package BasicLyX;
# This package includes subroutines to translate "clean" LaTeX to LyX.
# It translates only "basic" stuff, which means it doesn't do class-specific
# things. (It uses the TeX parser Text::TeX)
use strict;
use RelyxTable; # Handle LaTeX tables
use Verbatim; # Copy stuff verbatim
use vars qw($bibstyle_insert_string $bibstyle_file $Begin_Inset_Include);
$bibstyle_insert_string = "%%%%%Insert bibliographystyle file here!";
$bibstyle_file = "";
$Begin_Inset_Include = "\\begin_inset Include";
#################### PACKAGE-WIDE VARIABLES ###########################
my $debug_on; # is debugging on?
######
#Next text starts a new paragraph?
# $INP = 0 for plain text not starting a new paragraph
# $INP = 1 for text starting a new paragraph, so that we write a new
# \layout command and renew any font changes for the new paragraph
# Starts as 1 cuz if the first text in the document is plain text
# (not, e.g., in a \title command) it will start a new paragraph
my $IsNewParagraph = 1;
my $OldINP; #Save $IsNewParagraph during footnotes
# HACK to protect spaces within optional argument to \item
my $protect_spaces = 0;
# $MBD = 1 if we're in a list, but haven't seen an '\item' command
# In that case, we may need to start a nested "Standard" paragraph
my $MayBeDeeper = 0;
my $OldMBD; #Save $MBD during footnotes -- this should very rarely be necessary!
# Stack to take care of environments like Enumerate, Quote
# We need a separate stack for footnotes, which have separate layouts etc.
# Therefore we use a reference to an array, not just an array
my @LayoutStack = ("Standard"); #default if everything else pops off
my $CurrentLayoutStack = \@LayoutStack;
# Status of various font commands
# Every font characteristic (family, series, etc.) needs a stack, because
# there may be nested font commands, like \textsf{blah \texttt{blah} blah}
# CurrentFontStatus usually points to the main %FontStatus hash, but
# when we're in a footnote, it will point to a temporary hash
my %FontStatus = (
'\emph' => ["default"],
'\family' => ["default"],
'\series' => ["default"],
'\shape' => ["default"],
'\bar' => ["default"],
'\size' => ["default"],
'\noun' => ["default"],
);
my $CurrentFontStatus = \%FontStatus;
# Currently aligning paragraphs right, left, or center?
my $CurrentAlignment = "";
my $OldAlignment; # Save $AS during footnotes
# Global variables for copying tex stuff
my $tex_mode_string; # string we accumulate tex mode stuff in
my @tex_mode_tokens; # stack of tokens which required calling copy_latex_known
# LyX strings to start and end TeX mode
my $start_tex_mode = "\n\\latex latex \n";
my $end_tex_mode = "\n\\latex default \n";
# String to write before each item
my $item_preface = "";
############# INFORMATION ABOUT LATEX AND LYX #############################
# LyX translations of LaTeX font commands
my %FontTransTable = (
# Font commands
'\emph' => "\n\\emph on \n",
'\underline' => "\n\\bar under \n",
'\underbar' => "\n\\bar under \n", # plain tex equivalent of underline?
'\textbf' => "\n\\series bold \n",
'\textmd' => "\n\\series medium \n",
'\textsf' => "\n\\family sans \n",
'\texttt' => "\n\\family typewriter \n",
'\textrm' => "\n\\family roman \n",
'\textsc' => "\n\\shape smallcaps \n",
'\textsl' => "\n\\shape slanted \n",
'\textit' => "\n\\shape italic \n",
'\textup' => "\n\\shape up \n",
'\noun' => "\n\\noun on \n", # LyX abstraction of smallcaps
# Font size commands
'\tiny' => "\n\\size tiny \n",
'\scriptsize' => "\n\\size scriptsize \n",
'\footnotesize' => "\n\\size footnotesize \n",
'\small' => "\n\\size small \n",
'\normalsize' => "\n\\size default \n",
'\large' => "\n\\size large \n",
'\Large' => "\n\\size Large \n",
'\LARGE' => "\n\\size LARGE \n",
'\huge' => "\n\\size huge \n",
'\Huge' => "\n\\size Huge \n",
# This doesn't work yet!
#'\textnormal' => "\n\\series medium \n\\family roman \n\\shape up \n",
);
# Things LyX implements as "Floats"
my %FloatTransTable = (
# Footnote, Margin note
'\footnote' => "\n\\begin_float footnote \n",
'\thanks' => "\n\\begin_float footnote \n", # thanks is same as footnote
'\marginpar' => "\n\\begin_float margin \n",
);
# Environments that LyX implements as "floats"
my %FloatEnvTransTable = (
"table" => "\n\\begin_float tab \n",
"table*" => "\n\\begin_float wide-tab \n",
"figure" => "\n\\begin_float fig \n",
"figure*" => "\n\\begin_float wide-fig \n",
);
# Simple LaTeX tokens which are turned into small pieces of LyX text
my %TextTokenTransTable = (
# LaTeX escaped characters
'\_' => '_',
'\%' => '%',
'\$' => '$',
'\&' => '&',
'\{' => '{',
'\}' => '}',
'\#' => '#',
'\~' => '~',
'\^' => '^',
# \i and \j are used in accents. LyX doesn't recognize them in plain
# text. Hopefully, this isn't a problem.
'\i' => '\i',
'\j' => '\j',
# Misc simple LaTeX tokens
'~' => "\n\\protected_separator \n",
'@' => "@", # TeX.pm considers this a token, but it's not really
'\@' => "\\SpecialChar \\@",
'\ldots' => "\n\\SpecialChar \\ldots\{\}\n",
'\-' => "\\SpecialChar \\-\n",
'\LaTeX' => "LaTeX",
'\LaTeXe' => "LaTeX2e",
'\TeX' => "TeX",
'\LyX' => "LyX",
'\hfill' => "\n\\hfill \n",
'\noindent' => "\n\\noindent \n",
'\textbackslash' => "\n\\backslash \n",
'\textgreater' => ">",
'\textless' => "<",
'\textbar' => "|",
);
# LyX translations of some plain LaTeX text (TeX parser won't recognize it
# as a Token, so we need to translate the Text::TeX::Text token.)
my %TextTransTable = (
# Double quotes
"``" => "\n\\begin_inset Quotes eld\n\\end_inset \n\n",
"''" => "\n\\begin_inset Quotes erd\n\\end_inset \n\n",
# Tokens that don't start with a backslash, so parser won't recognize them
# (LyX doesn't support them, so we just print them in TeX mode)
'?`' => "$start_tex_mode?`$end_tex_mode",
'!`' => "$start_tex_mode!`$end_tex_mode",
);
# Things that LyX translates as "LatexCommand"s
# E.g., \ref{foo} ->'\begin_inset LatexCommand \ref{foo}\n\n\end_inset \n'
# (Some take arguments, others don't)
my @LatexCommands = map {"\\$_"} qw(ref pageref label cite bibliography
index printindex tableofcontents
listofalgorithms listoftables listoffigures);
my @IncludeCommands = map {"\\$_"} qw(input include);
# Accents. Most of these take an argument -- the thing to accent
# (\l and \L are handled as InsetLatexAccents, so they go here too)
my $AccentTokens = "\\\\[`'^#~=.uvHtcdblL\"]";
# Environments which describe justifying (converted to LyX \align commands)
# and the corresponding LyX commands
my %AlignEnvironments = (
"center" => "\n\\align center \n",
"flushright" => "\n\\align right \n",
"flushleft" => "\n\\align left \n",
);
# Some environments' begin commands take an extra argument
# Print string followed by arg for each item in the list, or ignore the arg ("")
my %ExtraArgEnvironments = (
"thebibliography" => "",
"lyxlist" =>'\labelwidthstring ',
"labeling" =>'\labelwidthstring ', # koma script list
);
# Math environments are copied verbatim
my $MathEnvironments = "(math|equation|displaymath|eqnarray(\\*)?)";
# ListLayouts may have standard paragraphs nested inside them.
my $ListLayouts = "Itemize|Enumerate|Description";
##################### PARSER INVOCATION ##################################
sub call_parser {
# This subroutine calls the TeX parser & translator
# Before it does that, it does lots of setup work to get ready for parsing.
# Arg0 is the file to read (clean) LaTeX from
# Arg1 is the file to write LyX to
# Arg2 is the file to read layouts from (e.g., in LYX_DIR/layouts/foo.layout)
my ($InFileName, $OutFileName) = (shift,shift);
# Before anything else, set the package-wide variables based on the
# user-given flags
# opt_d is set to 1 if '-d' option given, else (probably) undefined
$debug_on = (defined($main::opt_d) && $main::opt_d);
# Hash of tokens passed to the TeX parser
# Many values are $Text::TeX::Tokens{'\operatorname'}, which has
# Type=>report_args and count=>1
# Note that we don't have to bother putting in tokens which will be simply
# translated (e.g., from %TextTokenTransTable).
my %MyTokens = (
'{' => $Text::TeX::Tokens{'{'},
'}' => $Text::TeX::Tokens{'}'},
'\begin' => $Text::TeX::Tokens{'\begin'},
'\end' => $Text::TeX::Tokens{'\end'},
# Lots of other commands will be made by ReadCommands:Merge
# by reading the LaTeX syntax file
# Font sizing commands (local)
'\tiny' => {Type => 'local'},
'\small' => {Type => 'local'},
'\scriptsize' => {Type => 'local'},
'\footnotesize' => {Type => 'local'},
'\small' => {Type => 'local'},
'\normalsize' => {Type => 'local'},
'\large' => {Type => 'local'},
'\Large' => {Type => 'local'},
'\LARGE' => {Type => 'local'},
'\huge' => {Type => 'local'},
'\Huge' => {Type => 'local'},
# Tokens to ignore (which make a new paragraph)
# Just pretend they actually ARE new paragraph markers!
'\maketitle' => {'class' => 'Text::TeX::Paragraph'},
);
# Now add to MyTokens all of the commands that were read from the
# commands file by package ReadCommands
&ReadCommands::Merge(\%MyTokens);
# Here's the actual subroutine. The above is all preparation
# Output LyX file
my $zzz = $debug_on ? " ($InFileName --> $OutFileName)\n" : "... ";
print STDERR "Translating$zzz";
open (OUTFILE,">$OutFileName");
# Open the file to turn into LyX.
my $infile = new Text::TeX::OpenFile $InFileName,
'defaultact' => \&basic_lyx,
'tokens' => \%MyTokens;
# Process what's left of the file (everything from \begin{document})
$infile->process;
# Last line of the LyX file
print OUTFILE "\n\\the_end\n";
close OUTFILE;
#warn "Done with basic translation\n";
return;
} # end subroutine call_parser
########################## MAIN TRANSLATOR SUBROUTINE #####################
sub basic_lyx {
# This subroutine is called by Text::TeX::process each time subroutine
# eat returns a value.
# Argument 0 is the return value from subroutine eat
# Argument 1 is the Text::TeX::OpenFile (namely, $TeXfile)
my $eaten = shift;
my $fileobject = shift;
# This handles most but maybe not all comments
# THere shouldn't be any if we've run CleanTeX.pl
print "Comment: ",$eaten->comment if defined $eaten->comment && $debug_on;
my $type = ref($eaten);
print "$type " if $debug_on;
# This loop is basically just a switch. However, making it a for
# (1) makes $_ = $type (convenient)
# (2) allows us to use things like next and last
TYPESW: for ($type) {
# some pre-case work
s/^Text::TeX:://o or die "unknown token?!";
my ($dummy, $tok);
my ($thistable);
# The parser puts whitespace before certain kinds of tokens along
# with that token. If that happens, save a space
my $pre_space = ""; # whitespace before a token
if (/BegArgsToken|^Token|::Group$/) {
$dummy = $eaten->exact_print;
# Only set prespace if we match something
# We wouldn't want it to be more than one space, since that's
# illegal in LyX. Also, replace \t or \n with ' ' since they are
# ignored in LyX. Hopefully, this won't lead to anything worse
# than some lines with >80 chars
# Finally, don't put a space at the beginning of a new paragraph
if (($dummy =~ /^\s+/) && !$IsNewParagraph) {
$pre_space = " ";
}
}
# Handle blank lines.
if (m/^Paragraph$/o) {
# $INP <>0 means We will need a new layout command
$IsNewParagraph = 1;
# $MBD means start a begin_deeper within list environments
# unless there's an \item command
$MayBeDeeper = 1;
last TYPESW;
}
# If, e.g., there's just a comment in this token, don't do anything
# This actually shouldn't happen if CleanTeX has already removed them
last TYPESW if !defined $eaten->print;
# Handle LaTeX tokens
if (/^Token$/o) {
my $name = $eaten->token_name; # name of the token, e.g., "\large"
print "'$name' " if $debug_on;
# Tokens which turn into a bit of LyX text
if (exists $TextTokenTransTable{$name}) {
&CheckForNewParagraph; #Start new paragraph if necessary
my $to_print = $TextTokenTransTable{$name};
# \@ has to be specially handled, because it depends on
# the character AFTER the \@
if ($name eq '\@') {
my $next = $fileobject->eatGroup(1);
my $ch="";
$ch = $next->print or warn "\@ confused me!\n";
if ($ch eq '.') {
# Note: \@ CAN'T have pre_space before it
print OUTFILE "$to_print$ch\n";
print "followed by $ch" if $debug_on;
} else {
warn "LyX (or LaTeX) can't handle '$ch' after $name\n";
print OUTFILE $ch;
}
} else { # it's not \@
# Print the translated text (include preceding whitespace)
print OUTFILE "$pre_space$to_print";
} # end special handling for \@
# Handle tokens that LyX translates as a "LatexCommand" inset
} elsif (grep {$_ eq $name} @LatexCommands) {
&CheckForNewParagraph; #Start new paragraph if necessary
print OUTFILE "$pre_space\n\\begin_inset LatexCommand ",
$name,
"\n\n\\end_inset \n\n";
# Math -- copy verbatim until you're done
} elsif ($name eq '\(' || $name eq '\[') {
print "\nCopying math beginning with '$name'\n" if $debug_on;
# copy everything until end text
$dummy = &Verbatim::copy_verbatim($fileobject, $eaten);
$dummy = &fixmath($dummy); # convert '\sp' to '^', etc.
&CheckForNewParagraph; # math could be first thing in a par
print OUTFILE "$pre_space\n\\begin_inset Formula $name ";
print $dummy if $debug_on;
print OUTFILE $dummy;
} elsif ($name eq '\)' || $name eq '\]') {
# end math
print OUTFILE "$name\n\\end_inset \n\n";
print "\nDone copying math ending with '$name'" if $debug_on;
# Items in list environments
} elsif ($name eq '\item') {
# What if we had a nested "Standard" paragraph?
# Then write \end_deeper to finish the standard layout
# before we write the new \layout ListEnv command
if ($$CurrentLayoutStack[-1] eq "Standard") {
pop (@$CurrentLayoutStack); # take "Standard" off the stack
print OUTFILE "\n\\end_deeper ";
print "\nCurrent Layout Stack: @$CurrentLayoutStack"
if $debug_on;
} # end deeper if
# Upcoming text (the item) will be a new paragraph,
# requiring a new layout command based on whichever
# kind of list environment we're in
$IsNewParagraph = 1;
# But since we had an \item command, DON'T nest a
# deeper "Standard" paragraph in the list
$MayBeDeeper = 0;
# Check for an optional argument to \item
# If so, within the [] we need to protect spaces
# TODO: In fact, for description, if there's no [] or
# there's an empty [], then we need to write a ~, since LyX
# will otherwise make the next word the label
# If it's NOT a description & has a [] then we're stuck!
# They need to fix the bullets w/in lyx!
if (($dummy = $fileobject->lookAheadToken) &&
($dummy =~ /\s*\[/)) {
$fileobject->eatFixedString('\['); # eat the [
$protect_spaces = 1;
}
# Special lists (e.g. List layout) have to print something
# before each item. In that case, CFNP and print it
if ($item_preface) {
&CheckForNewParagraph;
print OUTFILE $item_preface;
}
# Font sizing commands
# (Other font commands are TT::BegArgsTokens because they take
# arguments. Font sizing commands are 'local' TT::Tokens)
} elsif (exists $FontTransTable{$name}) {
my $command = $FontTransTable{$name}; #e.g., '\size large'
if (! $IsNewParagraph) {
print OUTFILE "$pre_space$command";
} #otherwise, wait until we've printed the new paragraph command
# Store the current font change
($dummy = $command) =~ s/\s*(\S+)\s+(\w+)\s*/$1/;
die "Font command error" if !exists $$CurrentFontStatus{$dummy};
push (@{$CurrentFontStatus->{$dummy}}, $2);
print "\nCurrent $dummy Stack: @{$CurrentFontStatus->{$dummy}}"
if $debug_on;
# Table stuff
} elsif ($name eq '&') {
if ($thistable = &RelyxTable::in_table) {
print OUTFILE "\n\\newline \n";
$thistable->nextcol;
} else {warn "& is illegal outside a table!"}
} elsif ($name eq '\\\\' || $name eq '\\newline') {
&CheckForNewParagraph; # could be at beginning of par?
print OUTFILE "\n\\newline \n";
# If we're in a table, \\ means add a row to the table
# Note: if we're on the last row of the table, this extra
# row will get deleted later. This hack is necessary, because
# we don't know while reading when the last row is!
if ($thistable = &RelyxTable::in_table) {
$thistable->addrow;
}
} elsif ($name eq '\hline') {
if ($thistable = &RelyxTable::in_table) {
# hcline does hline if no arg is given
$thistable->hcline;
} else {warn "\\hline is illegal outside a table!"}
} elsif ($name =~ /\\verb.*?/) {
my $dummy = &Verbatim::copy_verb($fileobject, $eaten);
print "\nCopying $name in TeX mode: " if $debug_on;
&print_tex_mode ($dummy);
# Otherwise it's an unknown token, which must be copied
# in TeX mode, along with its arguments, if any
} else {
if (defined($eaten->relyx_args($fileobject))) {
©_latex_known($eaten, $fileobject);
} else { # it's not in MyTokens
©_latex_unknown($eaten, $fileobject);
}
}
last TYPESW;
}
# Handle tokens that take arguments, like \section{},\section*{}
if (/^BegArgsToken$/) {
my $name = $eaten->token_name;
print "$name" if $debug_on;
# Handle things that LyX translates as a "LatexCommand" inset
if (grep {$_ eq $name} @LatexCommands) {
&CheckForNewParagraph; #Start new paragraph if necessary
print OUTFILE "$pre_space\n\\begin_inset LatexCommand ";
# \bibliography gets handled as a LatexCommand inset, but
# it's a special case, cuz LyX syntax expects "\BibTeX"
# instead of "\bibliography" (I have no idea why), and because
# we have to print extra stuff
# Because we might not have encountered the
# \bibliographystyle command yet, we write
# "insert bibstyle here", and replace that string
# with the actual bibliographystyle argument in
# LastLyX (i.e., the next pass through the file)
if ($name eq "\\bibliography") {
print OUTFILE "\\BibTeX[", $bibstyle_insert_string, "]";
} else {
print OUTFILE "$name";
}
# \cite takes an optional argument, e.g.
my $args = $eaten->relyx_args ($fileobject);
while ($args =~ s/^o//) {
my $tok = $fileobject->eatOptionalArgument;
my $dummy = $tok->exact_print;
print OUTFILE $dummy;
}
print OUTFILE "\{";
last TYPESW; # skip to the end of the switch
}
if (grep {$_ eq $name} @IncludeCommands) {
&CheckForNewParagraph; #Start new paragraph if necessary
print OUTFILE "$pre_space\n$Begin_Inset_Include $name\{";
last TYPESW; # skip to the end of the switch
}
# This is to handle cases where _ is used, say, in a filename.
# When _ is used in math mode, it'll be copied by the math mode
# copying subs. Here we handle cases where it's used in non-math.
# Examples are filenames for \includegraphics & citation labels.
# (It's illegal to use it in regular LaTeX text.)
if ($name eq "_") {
print OUTFILE $eaten->exact_print;
last TYPESW;
}
# Sectioning and Title environments (using a LyX \layout command)
if (exists $ReadCommands::ToLayout->{$name}) {
&ConvertToLayout($name);
last TYPESW; #done translating
# Font characteristics
} elsif (exists $FontTransTable{$name}) {
my $dum2;
my $command = $FontTransTable{$name};
($dummy, $dum2) = ($command =~ /(\S+)\s+(\w+)/);
# HACK so that "\emph{hi \emph{bye}}" yields unemph'ed "bye"
if ( ($dummy eq "\\emph") &&
($CurrentFontStatus->{$dummy}->[-1] eq "on")) {
$dum2 = "default"; # "on" instead of default?
$command =~ s/on/default/;
}
# If we're about to start a new paragraph, save writing
# this command until *after* we write '\layout Standard'
if (! $IsNewParagraph) {
print OUTFILE "$pre_space$command";
}
# Store the current font change
die "Font command error" if !exists $$CurrentFontStatus{$dummy};
push (@{$CurrentFontStatus->{$dummy}}, $dum2);
# Handle footnotes and margin notes
# Make a new font table & layout stack which will be local to the
# footnote or marginpar
} elsif (exists $FloatTransTable{$name}) {
my $command = $FloatTransTable{$name};
# Open the footnote
print OUTFILE "$pre_space$command";
# Make $CurrentFontStatus point to a new (anonymous) font table
$CurrentFontStatus = {
'\emph' => ["default"],
'\family' => ["default"],
'\series' => ["default"],
'\shape' => ["default"],
'\bar' => ["default"],
'\size' => ["default"],
'\noun' => ["default"],
};
# And make $CurrentLayoutStack point to a new (anon.) stack
$CurrentLayoutStack = ["Standard"];
# Store whether we're at the end of a paragraph or not
# for when we get to end of footnote AND
# Note that the footnote text will be starting a new paragraph
# Also store the current alignment (justification)
$OldINP = $IsNewParagraph; $OldMBD = $MayBeDeeper;
$OldAlignment = $CurrentAlignment;
$IsNewParagraph = 1;
$MayBeDeeper = 0; #can't be deeper at beginning of footnote
$CurrentAlignment = "";
# Accents
} elsif ($name =~ m/^$AccentTokens$/) {
&CheckForNewParagraph; # may be at the beginning of a par
print OUTFILE "$pre_space\n",'\i ',$name,'{'
# Miscellaneous commands
} elsif ($name eq "\\multicolumn") {
if ($thistable = &RelyxTable::in_table) {
# the (simple text) first arg.
$dummy = $fileobject->eatRequiredArgument->contents->print;
my $group = $fileobject->eatRequiredArgument;
$thistable->multicolumn($dummy, $group);
} else {warn "\\multicolumn is illegal outside a table!"}
} elsif ($name eq '\cline') {
if ($thistable = &RelyxTable::in_table) {
# the (simple text) first arg.
$dummy = $fileobject->eatRequiredArgument->contents->print;
# sub hcline does cline if an arg is given
$thistable->hcline($dummy);
} else {warn "\\cline is illegal outside a table!"}
} elsif ($name eq '\bibliographystyle') {
$tok = $fileobject->eatRequiredArgument;
$bibstyle_file = "";
# There may be >1 token in the {}, e.g. "{a_b}" -> 3 tokens
my @toks = $tok->contents;
foreach $tok (@toks) {
# kludge: CleanTeX adds {} after _
$tok = $tok->contents if ref($tok) eq "Text::TeX::Group";
$bibstyle_file .= $tok->print;
}
print "\nBibliography style file is $bibstyle_file"if $debug_on;
# LyX \bibitem actually looks just like LaTeX bibitem, except
# it's in a Bibliography par & there must be a space after the
# bibitem command. Note we need to explicitly print the braces...
} elsif ($name eq "\\bibitem") {
$IsNewParagraph=1; # \bibitem always starts new par. in LyX
&CheckForNewParagraph;
$tok = $fileobject->eatOptionalArgument;
print OUTFILE "$name ", $tok->exact_print, "{";
# ensuremath -- copy verbatim until you're done
# but add \( and \)
# Note that we'll only get here if the command is NOT in math mode
} elsif ($name eq '\ensuremath') {
print "\nCopying math beginning with '$name'\n" if $debug_on;
my $tok = $fileobject->eatGroup; # eat math expression
my $dummy = $tok->exact_print;
$dummy =~ s/\{(.*)\}/$1/;
$dummy = &fixmath($dummy); # convert '\sp' to '^', etc.
&CheckForNewParagraph; # math could be first thing in a par
print OUTFILE "$pre_space\n\\begin_inset Formula \\( ";
print $dummy if $debug_on;
print OUTFILE $dummy;
# end math
print OUTFILE "\\)\n\\end_inset \n\n";
print "\nDone copying math" if $debug_on;
# Token in the ReadCommands command list that basic_lyx doesn't
# know how to handle
} else {
©_latex_known($eaten,$fileobject);
} # end big if
# Exit the switch
last TYPESW;
}
# ArgTokens appear when we've used eatRequiredArgument
if (/^ArgToken$/) {
# If we're copying a recognized but untranslatable token in tex mode
my $tok = $tex_mode_tokens[-1] || 0;
if ($eaten->base_token == $tok) {
©_latex_known($eaten,$fileobject);
}
last TYPESW;
}
if (/^EndArgsToken$/) {
# If we're copying a recognized but untranslatable token in tex mode
my $tok = $tex_mode_tokens[-1] || 0;
if ($eaten->base_token eq $tok) {
©_latex_known($eaten,$fileobject);
last TYPESW;
}
my $name = $eaten->token_name;
print "$name" if $debug_on;
# Handle things that LyX translates as a "LatexCommand" inset
# or "Include" insets
if (grep {$_ eq $name} @LatexCommands, @IncludeCommands) {
print OUTFILE "\}\n\n\\end_inset \n\n";
} elsif (exists $ReadCommands::ToLayout->{$name}) {
&EndLayout($name);
# Font characteristics
# Pop the current FontStatus stack for a given characteristic
# and give the new command (e.g., \emph default)
} elsif (exists $FontTransTable{$name}) {
my $command = $FontTransTable{$name};
($dummy) = ($command =~ /(\S+)\s+\w+/);
pop @{$CurrentFontStatus->{$dummy}};
$command = "\n$dummy $CurrentFontStatus->{$dummy}->[-1] \n";
print OUTFILE "$command";
# Footnotes and marginpars
} elsif (exists $FloatTransTable{$name}) {
print OUTFILE "\n\\end_float \n\n";
# Reset the layout stack and font status table pointers to
# point to the global stack/table again, instead of the
# footnote-specific stack/table
$CurrentFontStatus = \%FontStatus;
$CurrentLayoutStack = \@LayoutStack;
# We need to reissue any font commands (but not layouts)
foreach $dummy (keys %$CurrentFontStatus) {
if ($CurrentFontStatus->{$dummy}->[-1] ne "default") {
print OUTFILE $FontTransTable{$dummy};
}
}
# Same paragraph status as we had before the footnote started
$IsNewParagraph = $OldINP; $MayBeDeeper = $OldMBD;
$CurrentAlignment = $OldAlignment;
} elsif ($name =~ m/^$AccentTokens$/) {
print OUTFILE "}\n";
} elsif ($name eq "\\bibitem") {
print OUTFILE "}\n";
} # End if on $name
# Exit main switch
last TYPESW;
} # end if EndArgsToken
# Handle END of scope of local commands like \large
if (/^EndLocal$/) {
my $name = $eaten->token_name; #cmd we're ending, e.g.,\large
print $name if $debug_on;
if (exists $FontTransTable{$name}) {
my $command = $FontTransTable{$name};
($dummy = $command) =~ s/\s*(\S*)\s+(\w+)\s*/$1/; #e.g., '\size'
die "Font command error" if !exists $$CurrentFontStatus{$dummy};
# TT::OF->check_presynthetic returns local commands FIFO!
# So pop font stack, but warn if we pop the wrong thing
warn " font confusion?" if
pop @{$CurrentFontStatus->{$dummy}} ne $2;
print "\nCurrent $dummy Stack: @{$CurrentFontStatus->{$dummy}}"
if $debug_on;
my $newfont = $CurrentFontStatus->{$dummy}->[-1];
$command = "\n$dummy $newfont\n";
print OUTFILE "$command";
} else {
warn "Unknown EndLocal token!\n";
}
last TYPESW;
}
# We don't print { or }, but we make sure that the spacing is correct
# Handle '{'
if (/^Begin::Group$/) {
print OUTFILE "$pre_space";
last TYPESW;
}
# Handle '{'
if (/^End::Group$/) {
print OUTFILE "$pre_space";
last TYPESW;
}
# Handle \begin{foo}
if (/^Begin::Group::Args$/) {
print $eaten->print," " if $debug_on; # the string "\begin{foo}"
my $env = $eaten->environment;
# Any environment found in the layouts files
if (exists $ReadCommands::ToLayout->{$env}) {
&ConvertToLayout($env);
# Some environments have an extra argument. In that case,
# print the \layout command (cuz these environments always
# start new pars). Then either print the extra arg or
# ignore it (depending on the environment).
if (exists $ExtraArgEnvironments{$env}) {
if ($ExtraArgEnvironments{$env}) { #print it
# Should be just one token in the arg.
my $arg = $fileobject->eatBalanced->contents->print;
print "\nArgument $arg to $env environment"
if $debug_on;
$item_preface = $ExtraArgEnvironments{$env} . $arg."\n";
} else { #ignore it
print "\nIgnoring argument to $env environment"
if $debug_on;
}
} # end if for reading extra args to \begin command
# Math environments
} elsif ($env =~ /^$MathEnvironments$/o) {
&CheckForNewParagraph; # may be beginning of paragraph
my $begin_text = $eaten->print;
print "\nCopying math beginning with '$begin_text'\n"
if $debug_on;
print OUTFILE "\n\\begin_inset Formula $begin_text ";
$dummy = &Verbatim::copy_verbatim($fileobject, $eaten);
$dummy = &fixmath($dummy); # convert '\sp' to '^', etc.
print $dummy if $debug_on;
print OUTFILE $dummy;
# Alignment environments
} elsif (exists $AlignEnvironments{$env}) {
# Set it to the command which creates this alignment
$CurrentAlignment = $AlignEnvironments{$env};
($dummy) = ($CurrentAlignment =~ /\S+\s+(\w+)/);
print "\nNow $dummy-aligning text " if $debug_on;
# alignment environments automatically start a new paragraph
$IsNewParagraph = 1;
# Environments lyx translates to floats
} elsif (exists $FloatEnvTransTable{$env}) {
$tok = $fileobject->eatOptionalArgument;
if ($tok && defined ($dummy = $tok->print) && $dummy) {
print "\nIgnoring float placement '$dummy'" if $debug_on;
}
my $command = $FloatEnvTransTable{$env};
# Open the footnote
print OUTFILE "$command";
# table
} elsif ($env =~ /^tabular$/) { # don't allow tabular* or ctabular
# Table must start a new paragraph
$IsNewParagraph = 1; $MayBeDeeper = 1;
# We want to print table stuff *after* a \layout Standard
&CheckForNewParagraph;
# Since table info needs to come *before* the table content,
# put a line in the output file saying that the *next*
# reLyX pass needs to put the table info there
print OUTFILE "\n$RelyxTable::TableBeginString\n";
# Read and ignore an optional argument [t] or [b]
$tok = $fileobject->eatOptionalArgument;
if ($tok && defined ($dummy = $tok->print) && $dummy) {
print "\nIgnoring positioning arg '$dummy'" if $debug_on;
}
# Read the argument into a TT::Group
# (that group may contain groups, e.g. for {clp{10cm}}
$tok = $fileobject->eatGroup;
new RelyxTable::Table $tok;
# \begin document
} elsif ($env eq "document") {
# do nothing
#print "\nStarting to translate actual document" if $debug_on;
# Special environments to copy as regular text (-r option).
# Do this by copying the \begin & \end command in TeX mode
# (\Q\E around $env allows *'s in environment names!)
} elsif (grep /^\Q$env\E$/, @ReadCommands::regular_env) {
print "\nCopying $env environment as regular text\n"
if $debug_on;
$dummy = $eaten->print; # \begin{env}, ignore initial whitespace
&print_tex_mode($dummy);
# otherwise, it's an unknown environment
# In that case, copy everything up to the \end{env}
# Save stuff in global tex_mode_string so we can print it
# when we read & handle the \end{env}
} else {
print "\nUnknown environment $env" if $debug_on;
$tex_mode_string = "";
# print "\begin{env}
# For reLyXskip env, don't print the \begin & \end commands!
$tex_mode_string .= $eaten->exact_print
unless $env eq "reLyXskip";
$tex_mode_string .=&Verbatim::copy_verbatim($fileobject,$eaten);
}
last TYPESW;
}
# Handle \end{foo}
if (/^End::Group::Args$/) {
print $eaten->print," " if $debug_on; # the string "\end{foo}"
my $env = $eaten->environment;
# End of list or quote/verse environment
# OR special environment given with -t option
if (exists $ReadCommands::ToLayout->{$env}) {
&EndLayout($env);
$item_preface = ""; # reset when at end of List env.
# End of math environments
} elsif ($env =~ /^$MathEnvironments$/o) {
print OUTFILE "\\end{$env}\n\\end_inset \n\n";
print "\nDone copying math environment '$env'" if $debug_on;
} elsif (exists $AlignEnvironments{$env}) {
# Back to block alignment
$CurrentAlignment = "";
print "\nBack to block alignment" if $debug_on;
# assume that \end should end a paragraph
# This isn't correct LaTeX, but LyX can't align part of a par
$IsNewParagraph = 1;
# Environments lyx translates to floats
} elsif (exists $FloatEnvTransTable{$env}) {
print OUTFILE "\n\\end_float \n\n";
# table
} elsif ($env =~ /tabular$/) { # don't allow tabular*
if ($thistable = &RelyxTable::in_table) {
$thistable->done_reading;
print OUTFILE "\n$RelyxTable::TableEndString\n";
} else {warn "found \\end{tabular} when not in table!"}
# Anything after a table will be a new paragraph
$IsNewParagraph = 1; $MayBeDeeper = 1;
} elsif ($env eq "document") {
print "\nDone with document!" if $debug_on;
# "regular" environment given with -r option
} elsif (grep /^\Q$env\E$/, @ReadCommands::regular_env) {
$dummy = $eaten->print; # \end{env}, ignore initial whitespace
&print_tex_mode($dummy);
# Next stuff will be new env.
$IsNewParagraph = 1;
# End of unknown environments. We're already in TeX mode
} else {
# Add \end{env} (including initial whitespace) to string
# For reLyXskip environment, don't print \begin & \end commands!
$tex_mode_string .= $eaten->exact_print
unless $env eq "reLyXskip";
# Now print it
&print_tex_mode($tex_mode_string);
print "Done copying unknown environment '$env'" if $debug_on;
}
last TYPESW;
}
# Note for text handling: we have to do lots of stuff to handle
# spaces in (as close as possible to) the same way that LaTeX does
# LaTeX considers all whitespace to be the same, so basically, we
# convert each clump of whitespace to one space. Unfortunately, there
# are special cases, like whitespace at the beginning/end of a par,
# which we have to get rid of to avoid extra spaces in the LyX display.
# \n at the end of a paragraph must be considered like a space,
# because the next line might begin with a token like \LyX. But
# if the next line starts with \begin, say, then an extra space will be
# generated in the LyX file. Oh well. It doesn't affect the dvi file.
if (/^Text$/) {
my $outstr = $eaten->print; # the actual text
# don't bother printing whitespace
# Note: this avoids the problem of extra whitespace generating
# extra Text::TeX::Paragraphs, which would generate extra
# \layout commands
last TYPESW if $outstr =~ /^\s+$/;
# whitespace at beginning of a paragraph is meaningless
# e.g. \begin{foo}\n hello \end{foo} shouldn't print the \n
# (Note: check IsNewParagraph BEFORE calling &CFNP, which zeros it)
my $replace = $IsNewParagraph ? "" : " ";
$outstr =~ s/^\s+/$replace/;
# Only write '\layout Standard' once per paragraph
&CheckForNewParagraph;
# \n\n signals end of paragraph, so get rid of it (and any space
# before it)
$outstr =~ s/\s*\n\n$//;
# Print the LaTeX text to STDOUT
print "'$outstr'" if $debug_on;
# LyX *ignores* \n and \t, whereas LaTeX considers them just
# like a space.
# Also, many spaces are equivalent to one space in LaTeX
# (But LyX misleadingly displays them on screen, so get rid of them)
$outstr =~ s/\s+/ /g;
# protect spaces in an optional argument if necessary
# Put a SPACE after the argument for List, Description layouts
if ($protect_spaces) {
$dummy = $TextTokenTransTable{'~'};
# This will not handle brackets in braces!
if ($outstr =~ /\]/) { # protect spaces only *until* the bracket
my $tempstr = $`;
my $tempstr2 = $';
# Note that any \t's have been changed to space already
$tempstr =~ s/ /$dummy/g;
# Print 1 space after the argument (which finished with ])
# Don't print 2 (i.e. remove leading space from $tempstr2)
# don't print the bracket
$tempstr2 =~ s/^ //;
$outstr = "$tempstr $tempstr2";
$protect_spaces = 0; # Done with optional argument
} else { # protect all spaces, since we're inside brackets
$outstr =~ s/ /$dummy/g;
}
} # end special stuff for protected spaces
# Translate any LaTeX text that requires special LyX handling
foreach $dummy (keys %TextTransTable) {
$outstr =~ s/\Q$dummy\E/$TextTransTable{$dummy}/g;
}
# "pretty-print" the string. It's not perfect, since there may
# be text in the OUTFILE before $outstr, but it will keep from
# having REALLY long lines.
# Try to use approximately the same word-wrapping as LyX does:
# - before space after a period, except at end of string
# - before first space after column seventy-one
# - after 80'th column
while (1) {
$outstr =~ s/\. (?!$)/.\n / or
$outstr =~ s/(.{71,79}?) /$1\n / or
$outstr =~ s/(.{80})(.)/$1\n$2/ or
last; # exit loop if string is < 79 characters
}
# Actually print the text
print OUTFILE "$outstr";
last TYPESW;
} # end TT::Text handling
# The default action - this should never happen!
print("I don't know ",$eaten->print) if $debug_on;
} # end for ($type)
print "\n" if $debug_on;
} #end sub basic_lyx
######################### TEX MODE SUBROUTINES #########################
# This subroutine copies and prints a latex token and its arguments if any.
# This sub is only needed if the command was not found in the syntax file
# Use exact_print to preserve, e.g., whitespace after macros
sub copy_latex_unknown {
my $eaten = shift;
my $fileobject = shift;
my $outstr = $eaten->exact_print;
my ($dummy, $tok, $count);
# Copy the actual word. Copy while you've still got
# arguments. Assume all args must be in the same paragraph
# (There could be new paragraphs *within* args)
# We can't use copy_verbatim (unless we make it smarter) because
# it would choke on nested braces
print "\nUnknown token: '",$eaten->print,"': Copying in TeX mode\n"
if $debug_on;
my $dum2;
while (($dum2 = $fileobject->lookAheadToken) &&
($dum2 =~ /^[[{]$/)) {
if ($dum2 eq '[') { #copy optional argument - assume it's simple
$tok = $fileobject->eatOptionalArgument;
$outstr .= $tok->exact_print; # also print brackets & whitespace
} else {
$count = 0;
EAT: { #copied from eatBalanced, but allow paragraphs
die unless defined ($tok = $fileobject->eatMultiToken);
$outstr.="\n",redo EAT if ref($tok) eq "Text::TeX::Paragraph";
$dummy = $tok->exact_print;
$outstr .= $dummy;
# Sometimes, token will be '\n{', e.g.
$count++ if $dummy =~ /^\s*\{$/; # add a layer of nesting
$count-- if $dummy =~ /^\s*\}$/; # end one layer of nesting
redo EAT if $count; #don't dump out until all done nesting
} #end EAT block
} # end if $dummy = [{
} #end while
# Add {} after macro if it's followed by '}'. Otherwise, {\foo}bar
# will yield \foobar when LyX creates LaTeX files
$outstr.="{}" if $outstr=~/\\[a-zA-Z]+$/ && $dum2 eq '}';
# Print it out in TeX mode
&print_tex_mode($outstr);
print "\nDone copying unknown token" if $debug_on;
} # end sub copy_latex_unknown
# Copy an untranslatable latex command whose syntax we know, along with its
# arguments
# The command itself, optional arguments, and untranslatable
# arguments get copied in TeX mode. However, arguments which contain regular
# LaTeX will get translated by reLyX. Do that by printing what you have so
# far in TeX mode, leaving this subroutine, continuing with regular reLyX
# translating, and then returning here when you reach the ArgToken or
# EndArgsToken at the end of the translatable argument.
# We need to keep a stack of the tokens that brought us here, because
# you might have nested commands (e.g., \mbox{hello \fbox{there} how are you}
sub copy_latex_known {
my ($eaten, $fileobject) = (shift,shift);
my $type = ref($eaten);
$type =~ s/^Text::TeX::// or die "unknown token?!";
# token itself for TT::Token, TT::BegArgsToken,
# Corresponding BegArgsToken for ArgToken,EndArgsToken
my $temp_start = $eaten->base_token;
# Initialize tex mode copying
if ($type eq "BegArgsToken" or $type eq "Token") {
print "\nCopying untranslatable token '",$eaten->print,
"' in TeX mode" if $debug_on;
push @tex_mode_tokens, $temp_start;
# initialize the string of stuff we're copying
$tex_mode_string = $eaten->exact_print;
} # Start tex copying?
# Handle arguments
# This token's next arguments -- returns a string matching /o*[rR]?/
my $curr_args = $eaten->next_args($fileobject);
if ($type eq "EndArgsToken" or $type eq "ArgToken") {
# Print ending '}' for the group we just finished reading
$tex_mode_string .= '}';
}
# If there could be optional arguments next, copy them
while ($curr_args =~ s/^o// && $fileobject->lookAheadToken eq '[') {
my $opt = $fileobject->eatOptionalArgument;
$tex_mode_string .= $opt->exact_print;
}
$curr_args =~ s/^o*//; # Some OptArgs may not have appeared
if ($type eq "BegArgsToken" or $type eq "ArgToken") {
# Print beginning '{' for the group we're about to read
$tex_mode_string .= '{';
}
# Now copy the next required argument, if any
# Copy it verbatim (r), or translate it as regular LaTeX (R)?
if ($curr_args =~ s/^r//) {
my $group = $fileobject->eatRequiredArgument;
my $temp = $group->exact_print;
# Remove braces. They're put in explicitly
$temp =~ s/\{(.*)\}/$1/; # .* is greedy
$tex_mode_string .= $temp;
} elsif ($curr_args =~ s/^R//) {
print "\n" if $debug_on;
&print_tex_mode($tex_mode_string);
$tex_mode_string = "";
print "\nTranslating this argument for ",$temp_start->print,
" as regular LaTeX" if $debug_on;
} else { # anything but '' is weird
warn "weird arg $curr_args to ",$temp_start->print,"\n" if $curr_args;
}
# Finished tex mode copying
if ($type eq "Token" or $type eq "EndArgsToken") {
# Add {} to plain tokens followed by { or }. Otherwise {\foo}bar
# and \foo{bar} yield \foobar in the LaTeX files created by LyX
my $dummy;
if ($type eq "Token" and
$dummy=$fileobject->lookAheadToken and
$dummy =~ /[{}]/)
{
$tex_mode_string .= '{}';
}
# Print out the string
print "\n" if $debug_on;
&print_tex_mode($tex_mode_string);
$tex_mode_string = "";
# We're done with this token
pop(@tex_mode_tokens);
my $i = $type eq "Token" ? "" : " and its arguments";
my $j = $temp_start->print;
print "\nDone copying untranslatable token '$j'$i in TeX mode"
if $debug_on;
} # end tex copying?
} # end sub copy_latex_known
# Print a string in LyX "TeX mode"
# The goal of this subroutine is to create a block of LyX which will be
# translated exactly back to the original when LyX creates its temporary LaTeX
# file prior to creating a dvi file.
# Don't print \n\n at the end of the string... instead just set the
# new paragraph flag. Also, don't print \n at the beginning of the string.
# Print nothing if it's the beginning of a paragraph, or space otherwise.
# These two things avoid extra C-Enter's in the LyX file
sub print_tex_mode {
my $outstr = shift;
print "'$outstr'" if $debug_on;
# Handle extra \n's
my $str_ends_par = ($outstr =~ s/\n{2,}$//);
if ($IsNewParagraph) {
$outstr =~ s/\n//; # .e.g, $outstr follows '\begin{quote}\n'
} else {
$outstr =~ s/\n/ /; # e.g. $outstr follows '\LaTeX{}\n'
}
# Check whether string came right at the beginning of a new paragraph
# This *might* not be necessary. Probably can't hurt.
&CheckForNewParagraph;
# Get into TeX mode
print OUTFILE "$start_tex_mode";
# Do TeX mode translation;
$outstr =~ s/\\/\n\\backslash /g;
# don't translate \n in '\n\backslash' that we just made!
$outstr =~ s/\n(?!\\backslash)/\n\\newline \n/g;
# Print the actual token + arguments if any
print OUTFILE $outstr;
# Get OUT of LaTeX mode (and end nesting if nec.)
print OUTFILE "$end_tex_mode";
$IsNewParagraph = $str_ends_par;
return;
} # end sub print_tex_mode
############################ LAYOUT SUBROUTINES ###########################
sub CheckForNewParagraph {
# This subroutine makes sure we only write \layout command once per paragraph
# It's mostly necessary cuz 'Standard' layout is the default in LaTeX;
# there is no command which officially starts a standard environment
# If we're in a table, new layouts aren't allowed, so just return
# If $IsNewParagraph is 0, it does nothing
# If $INP==1, It starts a new paragraph
# If $CurrentAlignment is set, it prints the alignment command for this par.
# If $MayBeDeeper==1 and we're currently within a list environment,
# it starts a "deeper" Standard paragraph
my $dummy;
my $layout = $$CurrentLayoutStack[-1];
return if &RelyxTable::in_table;
if ($IsNewParagraph) {
# Handle standard text within a list environment specially
if ($MayBeDeeper) {
if ($layout =~ /^$ListLayouts$/o) {
push (@$CurrentLayoutStack, "Standard");
print "\nCurrent Layout Stack: @$CurrentLayoutStack\n"
if $debug_on;
print OUTFILE "\n\\begin_deeper ";
$layout = "Standard";
}
$MayBeDeeper = 0; # Don't test again until new paragraph
}
# Print layout command itself
print OUTFILE "\n\\layout $layout\n\n";
print OUTFILE $CurrentAlignment if $CurrentAlignment;
# Now that we've written the command, it's no longer a new paragraph
$IsNewParagraph = 0;
# When you write a new paragraph, reprint any font commands
foreach $dummy (keys %$CurrentFontStatus) {
my $currf = $CurrentFontStatus->{$dummy}->[-1];
if ($currf ne "default") {
print OUTFILE "\n$dummy $currf \n";
}
}
} # end if $INP
} # end sub CheckForNewParagraph
sub ConvertToLayout {
# This subroutine begins a new layout, pushing onto the layout stack, nesting
# if necessary. It doesn't actually write the \layout command -- that's
# done by CheckForNewParagraph.
# The subroutine assumes that it's being passed an environment name or macro
# which is known and which creates a known layout
# It uses the ToLayout hash (created by the ReadCommands module) which
# gives the LyX layout for a given LaTeX command or environment
# Arg0 is the environment or macro
my $name = shift;
my $layoutref = $ReadCommands::ToLayout->{$name};
my $layout = $layoutref->{'layout'};
my $dummy = ($name =~ /^\\/ ? "macro" : "environment");
print "\nChanging $dummy $name to layout $layout" if $debug_on;
# Nest if the layout stack has more than just "Standard" in it
if ($#{$CurrentLayoutStack} > 0) {
# Die here for sections & things that can't be nested!
print " Nesting!" if $debug_on;
print OUTFILE "\n\\begin_deeper ";
}
# Put the new layout onto the layout stack
push @$CurrentLayoutStack, $layout;
print "\nCurrent Layout Stack: @$CurrentLayoutStack" if $debug_on;
# Upcoming text will be new paragraph, needing a new layout cmd
$IsNewParagraph = 1;
# Test for nested "Standard" paragraph in upcoming text?
# Some environments can nest. Sections & Title commands can't
$MayBeDeeper = $layoutref->{"nestable"};
} # end sub ConvertToLayout
sub EndLayout {
# This subroutine ends a layout, popping the layout stack, etc.
# The subroutine assumes that it's being passed an environment name or macro
# which is known and which creates a known layout
# It uses the ToLayout hash (created by the ReadCommands module) which
# gives the LyX layout for a given LaTeX command or environment
# Arg0 is the environment or macro
my $name = shift;
my $layoutref = $ReadCommands::ToLayout->{$name};
my $layout = $layoutref->{'layout'};
my $dummy = ($name =~ /^\\/ ? "macro" : "environment");
print "\nEnding $dummy $name (layout $layout)" if $debug_on;
my $mylayout = pop (@$CurrentLayoutStack);
# If a standard paragraph was the last thing in a list, then
# we need to end_deeper and then pop the actual list layout
# This should only happen if the Standard layout was nested
# in a nestable layout. We don't check.
if ($mylayout eq "Standard") {
print OUTFILE "\n\\end_deeper ";
print " End Standard Nesting!" if $debug_on;
$mylayout = pop (@$CurrentLayoutStack);
}
# The layout we popped off the stack had better match the
# environment (or macro) we're ending!
if ($mylayout ne $layout) { die "Problem with Layout Stack!\n"};
print "\nCurrent Layout Stack: @$CurrentLayoutStack" if $debug_on;
# If we're finishing a nested layout, we need to end_deeper
# This should only happen if the layout was nested
# in a nestable layout. We don't check.
# Note that if we're nested in a list environment and the
# NEXT paragraph is Standard, then we'll have an extra
# \end_deeper \begin_deeper in the LyX file. It's sloppy
# but it works, and LyX will get rid of it when it
# resaves the file.
if ($#{$CurrentLayoutStack} > 0) {
print " End Nesting!" if $debug_on;
print OUTFILE "\n\\end_deeper ";
}
# Upcoming text will be new paragraph, needing a new layout cmd
$IsNewParagraph = 1;
# Test for nested "Standard" paragraph in upcoming text?
# Some environments can nest. Sections & Title commands can't
$MayBeDeeper = $layoutref->{"nestable"};
} # end sub EndLayout
####################### MISCELLANEOUS SUBROUTINES ###########################
sub fixmath {
# Translate math commands LyX doesn't support into commands it does support
my $input = shift;
my $output = "";
while ($input =~ s/
(.*?) # non-token matter ($1)
(\\ # token ($2) is a backslash followed by ...
( ([^A-Za-z] \*?) | # non-letter (and *) ($4) OR
([A-Za-z]+ \*?) ) # letters (and *) ($5)
)//xs) # /x to allow whitespace/comments, /s to copy \n's
{
$output .= $1;
my $tok = $2;
if (exists $ReadCommands::math_trans{$tok}) {
$tok = $ReadCommands::math_trans{$tok};
# add ' ' in case we had, e.g., \|a, which would become \Verta
# Only need to do it in those special cases
$tok .= ' ' if
defined $4 && $tok =~ /[A-Za-z]$/ && $input =~ /^[A-Za-z]/;
}
$output .= $tok;
}
$output .= $input; # copy what's left in $input
return $output;
}
1; # return true to calling subroutine
[ Original von:0.235Diese Quellcodebibliothek enthält Beispiele in vielen Programmiersprachen.
Man kann per Verzeichnistruktur darin navigieren.
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