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kivitendo/SL/Template/LaTeX.pm @ 961adb71

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package SL::Template::LaTeX;

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use parent qw(SL::Template::Simple);
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use strict;

sub new {
my $type = shift;

my $self = $type->SUPER::new(@_);

return $self;
}

sub format_string {
my ($self, $variable) = @_;
my $form = $self->{"form"};

$variable = $main::locale->quote_special_chars('Template/LaTeX', $variable);

# Allow some HTML markup to be converted into the output format's
# corresponding markup code, e.g. bold or italic.
my %markup_replace = ('b' => 'textbf',
'i' => 'textit',
'u' => 'underline');

foreach my $key (keys(%markup_replace)) {
my $new = $markup_replace{$key};
$variable =~ s/\$\<\$${key}\$\>\$(.*?)\$<\$\/${key}\$>\$/\\${new}\{$1\}/gi;
}

$variable =~ s/[\x00-\x1f]//g;

return $variable;
}

sub parse_foreach {
my ($self, $var, $text, $start_tag, $end_tag, @indices) = @_;

my ($form, $new_contents) = ($self->{"form"}, "");

my $ary = $self->_get_loop_variable($var, 1, @indices);

my $sum = 0;
my $current_page = 1;
my ($current_line, $corrent_row) = (0, 1);
my $description_array = $self->_get_loop_variable("description", 1);
my $longdescription_array = $self->_get_loop_variable("longdescription", 1);
my $linetotal_array = $self->_get_loop_variable("linetotal", 1);

$form->{TEMPLATE_ARRAYS}->{cumulatelinetotal} = [];

# forech block hasn't given us an array. ignore
return $new_contents unless ref $ary eq 'ARRAY';

for (my $i = 0; $i < scalar(@{$ary}); $i++) {
# do magic markers
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$form->{"__first__"} = $i == 0;
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$form->{"__last__"} = ($i + 1) == scalar(@{$ary});
$form->{"__odd__"} = (($i + 1) % 2) == 1;
$form->{"__counter__"} = $i + 1;

if ( ref $description_array eq 'ARRAY'
&& scalar @{$description_array} == scalar @{$ary}
&& $self->{"chars_per_line"} != 0)
{
my $lines = int(length($description_array->[$i]) / $self->{"chars_per_line"});
my $lpp;

$description_array->[$i] =~ s/(\\newline\s?)*$//;
$lines++ while ($description_array->[$i] =~ m/\\newline/g);
$lines++;

if ($current_page == 1) {
$lpp = $self->{"lines_on_first_page"};
} else {
$lpp = $self->{"lines_on_second_page"};
}

# Yes we need a manual page break -- or the user has forced one
if ( (($current_line + $lines) > $lpp)
|| ($description_array->[$i] =~ /<pagebreak>/)
|| ( ref $longdescription_array eq 'ARRAY'
&& $longdescription_array->[$i] =~ /<pagebreak>/)) {
my $pb = $self->{"pagebreak_block"};

# replace the special variables <%sumcarriedforward%>
# and <%lastpage%>

my $psum = $form->format_amount($self->{"myconfig"}, $sum, 2);
$pb =~ s/$self->{tag_start_qm}sumcarriedforward$self->{tag_end_qm}/$psum/g;
$pb =~ s/$self->{tag_start_qm}lastpage$self->{tag_end_qm}/$current_page/g;

my $new_text = $self->parse_block($pb, (@indices, $i));
return undef unless (defined($new_text));
$new_contents .= $new_text;

$current_page++;
$current_line = 0;
}
$current_line += $lines;
}

if ( ref $linetotal_array eq 'ARRAY'
&& $i < scalar(@{$linetotal_array})) {
$sum += $form->parse_amount($self->{"myconfig"}, $linetotal_array->[$i]);
}

$form->{TEMPLATE_ARRAYS}->{cumulatelinetotal}->[$i] = $form->format_amount($self->{"myconfig"}, $sum, 2);

my $new_text = $self->parse_block($text, (@indices, $i));
return undef unless (defined($new_text));
$new_contents .= $start_tag . $new_text . $end_tag;
}
map({ delete($form->{"__${_}__"}); } qw(first last odd counter));

return $new_contents;
}

sub find_end {
my ($self, $text, $pos, $var, $not) = @_;

my $tag_start_len = length $self->{tag_start};

my $depth = 1;
$pos = 0 unless ($pos);

while ($pos < length($text)) {
$pos++;

next if (substr($text, $pos - 1, length($self->{tag_start})) ne $self->{tag_start});

my $keyword_pos = $pos - 1 + $tag_start_len;

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if ((substr($text, $keyword_pos, 2) eq 'if') || (substr($text, $keyword_pos, 3) eq 'foreach')) {
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$depth++;

} elsif ((substr($text, $keyword_pos, 4) eq 'else') && (1 == $depth)) {
if (!$var) {
$self->{"error"} =
"$self->{tag_start}else$self->{tag_end} outside of "
. "$self->{tag_start}if$self->{tag_end} / "
. "$self->{tag_start}ifnot$self->{tag_end}.";
return undef;
}

my $block = substr($text, 0, $pos - 1);
substr($text, 0, $pos - 1) = "";
$text =~ s!^$self->{tag_start_qm}.+?$self->{tag_end_qm}!!;
$text = $self->{tag_start} . 'if' . ($not ? " " : "not ") . $var . $self->{tag_end} . $text;

return ($block, $text);

} elsif (substr($text, $keyword_pos, 3) eq 'end') {
$depth--;
if ($depth == 0) {
my $block = substr($text, 0, $pos - 1);
substr($text, 0, $pos - 1) = "";
$text =~ s!^$self->{tag_start_qm}.+?$self->{tag_end_qm}!!;

return ($block, $text);
}
}
}

return undef;
}

sub parse_block {
$main::lxdebug->enter_sub();

my ($self, $contents, @indices) = @_;

my $new_contents = "";

while ($contents ne "") {
my $pos_if = index($contents, $self->{tag_start} . 'if');
my $pos_foreach = index($contents, $self->{tag_start} . 'foreach');

if ((-1 == $pos_if) && (-1 == $pos_foreach)) {
$new_contents .= $self->substitute_vars($contents, @indices);
last;
}

if ((-1 == $pos_if) || ((-1 != $pos_foreach) && ($pos_if > $pos_foreach))) {
$new_contents .= $self->substitute_vars(substr($contents, 0, $pos_foreach), @indices);
substr($contents, 0, $pos_foreach) = "";

if ($contents !~ m|^$self->{tag_start_qm}foreach (.+?)$self->{tag_end_qm}|) {
$self->{"error"} = "Malformed $self->{tag_start}foreach$self->{tag_end}.";
$main::lxdebug->leave_sub();
return undef;
}

my $var = $1;

substr($contents, 0, length($&)) = "";

my $block;
($block, $contents) = $self->find_end($contents);
if (!$block) {
$self->{"error"} = "Unclosed $self->{tag_start}foreach$self->{tag_end}." unless ($self->{"error"});
$main::lxdebug->leave_sub();
return undef;
}

my $new_text = $self->parse_foreach($var, $block, "", "", @indices);
if (!defined($new_text)) {
$main::lxdebug->leave_sub();
return undef;
}
$new_contents .= $new_text;

} else {
if (!$self->_parse_block_if(\$contents, \$new_contents, $pos_if, @indices)) {
$main::lxdebug->leave_sub();
return undef;
}
}
}

$main::lxdebug->leave_sub();

return $new_contents;
}

sub parse_first_line {
my $self = shift;
my $line = shift || "";

if ($line =~ m/([^\s]+)set-tag-style([^\s]+)/) {
if ($1 eq $2) {
$self->{error} = "The tag start and end markers must not be equal.";
return 0;
}

$self->set_tag_style($1, $2);
}

return 1;
}

sub _parse_config_option {
my $self = shift;
my $line = shift;

$line =~ s/^\s*//;
$line =~ s/\s*$//;

my ($key, $value) = split m/\s*=\s*/, $line, 2;

if ($key eq 'tag-style') {
$self->set_tag_style(split(m/\s+/, $value, 2));
}
}

sub _parse_config_lines {
my $self = shift;
my $lines = shift;

my ($comment_start, $comment_end) = ("", "");

if (ref $self eq 'SL::Template::LaTeX') {
$comment_start = '\s*%';
} elsif (ref $self eq 'SL::Template::HTML') {
$comment_start = '\s*<!--';
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$comment_end = '(?:--)?>\s*';
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} else {
$comment_start = '\s*\#';
}

my $num_lines = scalar @{ $lines };
my $i = 0;

while ($i < $num_lines) {
my $line = $lines->[$i];

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if ($line !~ m/^${comment_start}\s*config\s*:(.*?)${comment_end}$/i) {
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$i++;
next;
}

$self->_parse_config_option($1);
splice @{ $lines }, $i, 1;
$num_lines--;
}
}

sub _force_mandatory_packages {
my $self = shift;
my $lines = shift;

my (%used_packages, $document_start_line);

foreach my $i (0 .. scalar @{ $lines } - 1) {
if ($lines->[$i] =~ m/\\usepackage[^\{]*{(.*?)}/) {
$used_packages{$1} = 1;

} elsif ($lines->[$i] =~ m/\\begin{document}/) {
$document_start_line = $i;
last;

}
}

$document_start_line = scalar @{ $lines } - 1 if (!defined $document_start_line);

if (!$used_packages{textcomp}) {
splice @{ $lines }, $document_start_line, 0, "\\usepackage{textcomp}\n";
$document_start_line++;
}
}

sub parse {
my $self = $_[0];
local *OUT = $_[1];
my $form = $self->{"form"};

if (!open(IN, "$form->{templates}/$form->{IN}")) {
$self->{"error"} = "$!";
return 0;
}
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binmode IN, ":utf8" if $::locale->is_utf8;
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my @lines = <IN>;
close(IN);

$self->_parse_config_lines(\@lines);
$self->_force_mandatory_packages(\@lines) if (ref $self eq 'SL::Template::LaTeX');

my $contents = join("", @lines);

# detect pagebreak block and its parameters
if ($contents =~ /$self->{tag_start_qm}pagebreak\s+(\d+)\s+(\d+)\s+(\d+)\s*$self->{tag_end_qm}(.*?)$self->{tag_start_qm}end(\s*pagebreak)?$self->{tag_end_qm}/s) {
$self->{"chars_per_line"} = $1;
$self->{"lines_on_first_page"} = $2;
$self->{"lines_on_second_page"} = $3;
$self->{"pagebreak_block"} = $4;

substr($contents, length($`), length($&)) = "";
}

$self->{"forced_pagebreaks"} = [];

my $new_contents = $self->parse_block($contents);
if (!defined($new_contents)) {
$main::lxdebug->leave_sub();
return 0;
}

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binmode OUT, ":utf8" if $::locale->is_utf8;
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print(OUT $new_contents);

if ($form->{"format"} =~ /postscript/i) {
return $self->convert_to_postscript();
} elsif ($form->{"format"} =~ /pdf/i) {
return $self->convert_to_pdf();
} else {
return 1;
}
}

sub convert_to_postscript {
my ($self) = @_;
my ($form, $userspath) = ($self->{"form"}, $self->{"userspath"});

# Convert the tex file to postscript

if (!chdir("$userspath")) {
$self->{"error"} = "chdir : $!";
$self->cleanup();
return 0;
}

$form->{tmpfile} =~ s/\Q$userspath\E\///g;

my $latex = $self->_get_latex_path();

for (my $run = 1; $run <= 2; $run++) {
system("${latex} --interaction=nonstopmode $form->{tmpfile} " .
"> $form->{tmpfile}.err");
if ($?) {
$self->{"error"} = $form->cleanup();
$self->cleanup();
return 0;
}
}

$form->{tmpfile} =~ s/tex$/dvi/;

system("dvips $form->{tmpfile} -o -q > /dev/null");
if ($?) {
$self->{"error"} = "dvips : $!";
$self->cleanup();
return 0;
}
$form->{tmpfile} =~ s/dvi$/ps/;

$self->cleanup();

return 1;
}

sub convert_to_pdf {
my ($self) = @_;
my ($form, $userspath) = ($self->{"form"}, $self->{"userspath"});

# Convert the tex file to PDF

if (!chdir("$userspath")) {
$self->{"error"} = "chdir : $!";
$self->cleanup();
return 0;
}

$form->{tmpfile} =~ s/\Q$userspath\E\///g;

my $latex = $self->_get_latex_path();

for (my $run = 1; $run <= 2; $run++) {
system("${latex} --interaction=nonstopmode $form->{tmpfile} " .
"> $form->{tmpfile}.err");
if ($?) {
$self->{"error"} = $form->cleanup();
$self->cleanup();
return 0;
}
}

$form->{tmpfile} =~ s/tex$/pdf/;

$self->cleanup();
}

sub _get_latex_path {
return $main::latex_bin || 'pdflatex';
}

sub get_mime_type() {
my ($self) = @_;

if ($self->{"form"}->{"format"} =~ /postscript/i) {
return "application/postscript";
} else {
return "application/pdf";
}
}

sub uses_temp_file {
return 1;
}

1;