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TmplTokenizer.pm
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TmplTokenizer.pm
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package TmplTokenizer;
use strict;
use TmplTokenType;
use TmplToken;
use VerboseWarnings qw( pedantic_p error_normal warn_normal warn_pedantic );
require Exporter;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
###############################################################################
=head1 NAME
TmplTokenizer.pm - Simple-minded tokenizer class for HTML::Template .tmpl files
=head1 DESCRIPTION
Because .tmpl files contains HTML::Template directives
that tend to confuse real parsers (e.g., HTML::Parse),
it might be better to create a customized scanner
to scan the template files for tokens.
This module is a simple-minded attempt at such a scanner.
=cut
###############################################################################
$VERSION = 0.02;
@ISA = qw(Exporter);
@EXPORT_OK = qw();
use vars qw( $pedantic_attribute_error_in_nonpedantic_mode_p );
use vars qw( $pedantic_tmpl_var_use_in_nonpedantic_mode_p );
use vars qw( $pedantic_error_markup_in_pcdata_p );
###############################################################################
# Hideous stuff
use vars qw( $re_directive $re_tmpl_var $re_tmpl_var_escaped $re_tmpl_include );
use vars qw( $re_directive_control $re_tmpl_endif_endloop );
BEGIN {
# $re_directive must not do any backreferences
$re_directive = q{<(?:(?i)(?:!--\s*)?\/?TMPL_(?:VAR|LOOP|INCLUDE|IF|ELSE|UNLESS)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
# TMPL_VAR or TMPL_INCLUDE
$re_tmpl_var = q{<(?:(?i)(?:!--\s*)?TMPL_(?:VAR)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
$re_tmpl_include = q{<(?:(?i)(?:!--\s*)?TMPL_(?:INCLUDE)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
# TMPL_VAR ESCAPE=1/HTML/URL
$re_tmpl_var_escaped = q{<(?:(?i)(?:!--\s*)?TMPL_(?:VAR|INCLUDE)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))\s+ESCAPE=(?:1|HTML|URL)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
# Any control flow directive
$re_directive_control = q{<(?:(?i)(?:!--\s*)?\/?TMPL_(?:LOOP|IF|ELSE|UNLESS)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
# /LOOP or /IF or /UNLESS
$re_tmpl_endif_endloop = q{<(?:(?i)(?:!--\s*)?\/TMPL_(?:LOOP|IF|UNLESS)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
}
# Hideous stuff from subst.pl, slightly modified to use the above hideous stuff
# Note: The $re_tag's set $1 (<tag), $2 (>), and $3 (rest of string)
use vars qw( $re_comment $re_entity_name $re_end_entity $re_etag );
use vars qw( $re_tag_strict $re_tag_compat @re_tag );
sub re_tag ($) {
my($compat) = @_;
my $etag = $compat? '>': '<>\/';
# This is no longer similar to the original regexp in subst.pl :-(
# Note that we don't want <> in compat mode; Mozilla knows about <
q{(<\/?(?:|(?:"(?:} . $re_directive . q{|[^"])*"|'(?:} . $re_directive . q{|[^'])*'|--(?:(?!--)(?:$re_directive)*.)*--|(?:}
. $re_directive
. q{|(?!--)[^"'<>} . $etag . q{]))+))([} . $etag . q{]|(?=<))(.*)};
}
BEGIN {
$re_comment = '(?:--(?:[^-]|-[^-])*--)';
$re_entity_name = '(?:[^&%#;<>\s]+)'; # NOTE: not really correct SGML
$re_end_entity = '(?:;|$|(?=\s))'; # semicolon or before-whitespace
$re_etag = q{(?:<\/?(?:"[^"]*"|'[^']*'|[^"'>\/])*[>\/])}; # end-tag
@re_tag = ($re_tag_strict, $re_tag_compat) = (re_tag(0), re_tag(1));
}
# End of the hideous stuff
use vars qw( $serial );
###############################################################################
sub FATAL_P () {'fatal-p'}
sub SYNTAXERROR_P () {'syntaxerror-p'}
sub FILENAME () {'input'}
sub HANDLE () {'handle'}
sub READAHEAD () {'readahead'}
sub LINENUM_START () {'lc_0'}
sub LINENUM () {'lc'}
sub CDATA_MODE_P () {'cdata-mode-p'}
sub CDATA_CLOSE () {'cdata-close'}
sub PCDATA_MODE_P () {'pcdata-mode-p'} # additional submode for CDATA
sub JS_MODE_P () {'js-mode-p'} # cdata-mode-p must also be true
sub ALLOW_CFORMAT_P () {'allow-cformat-p'}
sub new {
shift;
my ($filename) = @_;
open my $handle,$filename or die "can't open $filename";
bless {
filename => $filename
, handle => $handle
, readahead => []
} , __PACKAGE__;
}
###############################################################################
# Simple getters
sub filename {
my $this = shift;
return $this->{filename};
}
sub _handle {
my $this = shift;
return $this->{handle};
}
sub fatal_p {
my $this = shift;
return $this->{+FATAL_P};
}
sub syntaxerror_p {
my $this = shift;
return $this->{+SYNTAXERROR_P};
}
sub has_readahead_p {
my $this = shift;
return @{$this->{readahead}};
}
sub _peek_readahead {
my $this = shift;
return $this->{readahead}->[$#{$this->{readahead}}];
}
sub line_number_start {
my $this = shift;
return $this->{+LINENUM_START};
}
sub line_number {
my $this = shift;
return $this->{+LINENUM};
}
sub cdata_mode_p {
my $this = shift;
return $this->{+CDATA_MODE_P};
}
sub pcdata_mode_p {
my $this = shift;
return $this->{+PCDATA_MODE_P};
}
sub js_mode_p {
my $this = shift;
return $this->{+JS_MODE_P};
}
sub cdata_close {
my $this = shift;
return $this->{+CDATA_CLOSE};
}
sub allow_cformat_p {
my $this = shift;
return $this->{+ALLOW_CFORMAT_P};
}
# Simple setters
sub _set_fatal {
my $this = shift;
$this->{+FATAL_P} = $_[0];
return $this;
}
sub _set_syntaxerror {
my $this = shift;
$this->{+SYNTAXERROR_P} = $_[0];
return $this;
}
sub _push_readahead {
my $this = shift;
push @{$this->{readahead}}, $_[0];
return $this;
}
sub _pop_readahead {
my $this = shift;
return pop @{$this->{readahead}};
}
sub _append_readahead {
my $this = shift;
$this->{readahead}->[$#{$this->{readahead}}] .= $_[0];
return $this;
}
sub _set_readahead {
my $this = shift;
$this->{readahead}->[$#{$this->{readahead}}] = $_[0];
return $this;
}
sub _increment_line_number {
my $this = shift;
$this->{+LINENUM} += 1;
return $this;
}
sub _set_line_number_start {
my $this = shift;
$this->{+LINENUM_START} = $_[0];
return $this;
}
sub _set_cdata_mode {
my $this = shift;
$this->{+CDATA_MODE_P} = $_[0];
return $this;
}
sub _set_pcdata_mode {
my $this = shift;
$this->{+PCDATA_MODE_P} = $_[0];
return $this;
}
sub _set_js_mode {
my $this = shift;
$this->{+JS_MODE_P} = $_[0];
return $this;
}
sub _set_cdata_close {
my $this = shift;
$this->{+CDATA_CLOSE} = $_[0];
return $this;
}
sub set_allow_cformat {
my $this = shift;
$this->{+ALLOW_CFORMAT_P} = $_[0];
return $this;
}
###############################################################################
use vars qw( $js_EscapeSequence );
BEGIN {
# Perl quoting is really screwed up, but this common subexp is way too long
$js_EscapeSequence = q{\\\\(?:['"\\\\bfnrt]|[^0-7xu]|[0-3]?[0-7]{1,2}|x[\da-fA-F]{2}|u[\da-fA-F]{4})};
}
sub parenleft () { '(' }
sub parenright () { ')' }
sub split_js ($) {
my ($s0) = @_;
my @it = ();
while (length $s0) {
if ($s0 =~ /^\s+/s) { # whitespace
push @it, $&;
$s0 = $';
} elsif ($s0 =~ /^\/\/[^\r\n]*(?:[\r\n]|$)/s) { # C++-style comment
push @it, $&;
$s0 = $';
} elsif ($s0 =~ /^\/\*(?:(?!\*\/).)*\*\//s) { # C-style comment
push @it, $&;
$s0 = $';
# Keyword or identifier, ECMA-262 p.13 (section 7.5)
} elsif ($s0 =~ /^[A-Z_\$][A-Z\d_\$]*/is) { # IdentifierName
push @it, $&;
$s0 = $';
# Punctuator, ECMA-262 p.13 (section 7.6)
} elsif ($s0 =~ /^(?:[\(\){}\[\];]|>>>=|<<=|>>=|[-\+\*\/\&\|\^\%]=|>>>|<<|>>|--|\+\+|\|\||\&\&|==|<=|>=|!=|[=><,!~\?:\.\-\+\*\/\&\|\^\%])/s) {
push @it, $&;
$s0 = $';
# DecimalLiteral, ECMA-262 p.14 (section 7.7.3); note: bug in the spec
} elsif ($s0 =~ /^(?:0|[1-9]\d+(?:\.\d*(?:[eE][-\+]?\d+)?)?)/s) {
push @it, $&;
$s0 = $';
# HexIntegerLiteral, ECMA-262 p.15 (section 7.7.3)
} elsif ($s0 =~ /^0[xX][\da-fA-F]+/s) {
push @it, $&;
$s0 = $';
# OctalIntegerLiteral, ECMA-262 p.15 (section 7.7.3)
} elsif ($s0 =~ /^0[\da-fA-F]+/s) {
push @it, $&;
$s0 = $';
# StringLiteral, ECMA-262 p.17 (section 7.7.4)
# XXX SourceCharacter doesn't seem to be defined (?)
} elsif ($s0 =~ /^(?:"(?:(?!["\\\r\n]).|$js_EscapeSequence)*"|'(?:(?!['\\\r\n]).|$js_EscapeSequence)*')/os) {
push @it, $&;
$s0 = $';
} elsif ($s0 =~ /^./) { # UNKNOWN TOKEN !!!
push @it, $&;
$s0 = $';
}
}
return @it;
}
sub STATE_UNDERSCORE () { 1 }
sub STATE_PARENLEFT () { 2 }
sub STATE_STRING_LITERAL () { 3 }
# XXX This is a crazy hack. I don't want to write an ECMAScript parser.
# XXX A scanner is one thing; a parser another thing.
sub identify_js_translatables (@) {
my @input = @_;
my @output = ();
# We mark a JavaScript translatable string as in C, i.e., _("literal")
# For simplicity, we ONLY look for "_" "(" StringLiteral ")"
for (my $i = 0, my $state = 0, my($j, $q, $s); $i <= $#input; $i += 1) {
my $reset_state_p = 0;
push @output, [0, $input[$i]];
if ($input[$i] !~ /\S/s) {
;
} elsif ($state == 0) {
$state = STATE_UNDERSCORE if $input[$i] eq '_';
} elsif ($state == STATE_UNDERSCORE) {
$state = $input[$i] eq parenleft ? STATE_PARENLEFT : 0;
} elsif ($state == STATE_PARENLEFT) {
if ($input[$i] =~ /^(['"])(.*)\1$/s) {
($state, $j, $q, $s) = (STATE_STRING_LITERAL, $#output, $1, $2);
} else {
$state = 0;
}
} elsif ($state == STATE_STRING_LITERAL) {
if ($input[$i] eq parenright) {
$output[$j] = [1, $output[$j]->[1], $q, $s];
}
$state = 0;
} else {
die "identify_js_translatables internal error: Unknown state $state"
}
}
return \@output;
}
###############################################################################
sub _extract_attributes ($;$) {
my $this = shift;
my($s, $lc) = @_;
my %attr;
$s = $1 if $s =~ /^<(?:(?!$re_directive_control)\S)+(.*)\/\S$/s # XML-style self-closing tags
|| $s =~ /^<(?:(?!$re_directive_control)\S)+(.*)\S$/s; # SGML-style tags
for (my $i = 0; $s =~ /^(?:$re_directive_control)?\s+(?:$re_directive_control)?(?:([a-zA-Z][-a-zA-Z0-9]*)\s*=\s*)?('((?:$re_directive|[^'])*)'|"((?:$re_directive|[^"])*)"|((?:$re_directive|[^\s<>])+))/os;) {
my($key, $val, $val_orig, $rest)
= ($1, (defined $3? $3: defined $4? $4: $5), $2, $');
$i += 1;
$attr{+lc($key)} = [$key, $val, $val_orig, $i];
$s = $rest;
if ($val =~ /$re_tmpl_include/os) {
warn_normal "TMPL_INCLUDE in attribute: $val_orig\n", $lc;
} elsif ($val =~ /$re_tmpl_var/os && $val !~ /$re_tmpl_var_escaped/os) {
# XXX: we probably should not warn if key is "onclick" etc
# XXX: there's just no reasonable thing to suggest
my $suggest = ($key =~ /^(?:action|archive|background|cite|classid|codebase|data|datasrc|for|href|longdesc|profile|src|usemap)$/i? 'URL': 'HTML');
undef $suggest if $key =~ /^(?:onblur|onchange|onclick|ondblclick|onfocus|onkeydown|onkeypress|onkeyup|onload|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|onreset|onselect|onsubmit|onunload)$/i;
warn_pedantic
"Suggest ESCAPE=$suggest for TMPL_VAR in attribute \"$key\""
. ": $val_orig",
$lc, \$pedantic_tmpl_var_use_in_nonpedantic_mode_p
if defined $suggest && (pedantic_p || !$pedantic_tmpl_var_use_in_nonpedantic_mode_p);
} elsif ($val_orig !~ /^['"]/) {
my $t = $val; $t =~ s/$re_directive_control//os;
warn_pedantic
"Unquoted attribute contains character(s) that should be quoted"
. ": $val_orig",
$lc, \$pedantic_attribute_error_in_nonpedantic_mode_p
if $t =~ /[^-\.A-Za-z0-9]/s;
}
}
my $s2 = $s; $s2 =~ s/$re_tmpl_endif_endloop//g; # for the next check
if ($s2 =~ /\S/s) { # should never happen
if ($s =~ /^([^\n]*)\n/s) { # this is even worse
error_normal("Completely confused while extracting attributes: $1", $lc);
error_normal((scalar(split(/\n/, $s)) - 1) . " more line(s) not shown.", undef);
$this->_set_fatal( 1 );
} else {
# There's something wrong with the attribute syntax.
# We might be able to deduce a likely cause by looking more.
if ($s =~ /^[a-z0-9]/is && "<foo $s>" =~ /^$re_tag_compat$/s) {
warn_normal "Probably missing whitespace before or missing quotation mark near: $s\n", $lc;
} else {
warn_normal "Strange attribute syntax: $s\n", $lc;
}
}
}
return \%attr;
}
sub _next_token_internal {
my $this = shift;
my($h) = @_;
my($it, $kind);
my $eof_p = 0;
$this->_pop_readahead if $this->has_readahead_p
&& !ref $this->_peek_readahead
&& !length $this->_peek_readahead;
if (!$this->has_readahead_p) {
my $next = scalar <$h>;
$eof_p = !defined $next;
if (!$eof_p) {
$this->_increment_line_number;
$this->_push_readahead( $next );
}
}
$this->_set_line_number_start( $this->line_number ); # remember 1st line num
if ($this->has_readahead_p && ref $this->_peek_readahead) { # TmplToken obj.
($it, $kind) = ($this->_pop_readahead, undef);
} elsif ($eof_p && !$this->has_readahead_p) { # nothing left to do
;
} elsif ($this->_peek_readahead =~ /^\s+/s) { # whitespace
($kind, $it) = (TmplTokenType::TEXT, $&);
$this->_set_readahead( $' );
# FIXME the following (the [<\s] part) is an unreliable HACK :-(
} elsif ($this->_peek_readahead =~ /^(?:[^<]|<[<\s])*(?:[^<\s])/s) { # non-space normal text
($kind, $it) = (TmplTokenType::TEXT, $&);
$this->_set_readahead( $' );
warn_normal "Unescaped < in $it\n", $this->line_number_start
if !$this->cdata_mode_p && $it =~ /</s;
} else { # tag/declaration/processing instruction
my $ok_p = 0;
my $bad_comment_p = 0;
for (my $cdata_close = $this->cdata_close;;) {
if ($this->cdata_mode_p) {
my $next = $this->_pop_readahead;
if ($next =~ /^$cdata_close/is) {
($kind, $it) = (TmplTokenType::TAG, $&);
$this->_push_readahead( $' );
$ok_p = 1;
} elsif ($next =~ /^((?:(?!$cdata_close).)+)($cdata_close)/is) {
($kind, $it) = (TmplTokenType::TEXT, $1);
$this->_push_readahead( "$2$'" );
$ok_p = 1;
} else {
($kind, $it) = (TmplTokenType::TEXT, $next);
$ok_p = 1;
}
} elsif ($this->_peek_readahead =~ /^$re_tag_compat/os) {
# If we detect a "closed start tag" but we know that the
# following token looks like a TMPL_VAR, don't stop
my($head, $tail, $post) = ($1, $2, $3);
if ($tail eq '' && $post =~ $re_tmpl_var) {
# Don't bother to show the warning if we're too confused
# FIXME. There's no method for _closed_start_tag_warning
if (!defined $this->{'_closed_start_tag_warning'}
|| ($this->{'_closed_start_tag_warning'}->[0] eq $head
&& $this->{'_closed_start_tag_warning'}->[1] != $this->line_number - 1)) {
warn_normal "Possible SGML \"closed start tag\" notation: $head<\n", $this->line_number
if split(/\n/, $head) < 10;
}
$this->{'_closed_start_tag_warning'} = [$head, $this->line_number];
} else {
($kind, $it) = (TmplTokenType::TAG, "$head>");
$this->_set_readahead( $post );
$ok_p = 1;
warn_normal "SGML \"closed start tag\" notation: $head<\n", $this->line_number if $tail eq '';
}
} elsif ($this->_peek_readahead =~ /^<!--(?:(?!-->)$re_directive*.)*-->/os) {
($kind, $it) = (TmplTokenType::COMMENT, $&);
$this->_set_readahead( $' );
$ok_p = 1;
$bad_comment_p = 1;
}
last if $ok_p;
my $next = scalar <$h>;
$eof_p = !defined $next;
last if $eof_p;
$this->_increment_line_number;
$this->_append_readahead( $next );
}
if ($kind ne TmplTokenType::TAG) {
;
} elsif ($it =~ /^<!/) {
$kind = TmplTokenType::DECL;
$kind = TmplTokenType::COMMENT if $it =~ /^<!--(?:(?!-->).)*-->/;
if ($kind == TmplTokenType::COMMENT && $it =~ /^<!--\s*#include/s) {
warn_normal "Apache #include directive found instead of HTML::Template <TMPL_INCLUDE> directive", $this->line_number_start;
}
} elsif ($it =~ /^<\?/) {
$kind = TmplTokenType::PI;
}
if ($it =~ /^$re_directive/ios && !$this->cdata_mode_p) {
$kind = TmplTokenType::DIRECTIVE;
} elsif ($bad_comment_p) {
warn_normal sprintf("Syntax error in comment: %s\n", $it),
$this->line_number_start;
$this->_set_syntaxerror( 1 );
}
if (!$ok_p && $eof_p) {
($kind, $it) = (TmplTokenType::UNKNOWN, $this->_peek_readahead);
$this->_set_readahead, undef;
$this->_set_syntaxerror( 1 );
}
}
warn_normal "Unrecognizable token found: "
. (split(/\n/, $it) < 10? $it: '(too confused to show details)')
. "\n", $this->line_number_start
if $kind == TmplTokenType::UNKNOWN;
return defined $it? (ref $it? $it: TmplToken->new($it, $kind, $this->line_number, $this->filename)): undef;
}
sub _next_token_intermediate {
my $this = shift;
my $h = $this->_handle;
my $it;
if (!$this->cdata_mode_p) {
$it = $this->_next_token_internal($h);
if (defined $it && $it->type == TmplTokenType::TAG) {
if ($it->string =~ /^<(script|style|textarea)\b/is) {
$this->_set_cdata_mode( 1 );
$this->_set_cdata_close( "</$1\\s*>" );
$this->_set_pcdata_mode( 0 );
$this->_set_js_mode( lc($1) eq 'script' );
# } elsif ($it->string =~ /^<(title)\b/is) {
# $this->_set_cdata_mode( 1 );
# $this->_set_cdata_close( "</$1\\s*>" );
# $this->_set_pcdata_mode( 1 );
}
$it->set_attributes( $this->_extract_attributes($it->string, $it->line_number) );
}
} else {
my $eof_p = 0;
for ($it = '', my $cdata_close = $this->cdata_close;;) {
my $next = $this->_next_token_internal($h);
$eof_p = !defined $next;
last if $eof_p;
if (defined $next && $next->string =~ /$cdata_close/is) {
$this->_push_readahead( $next ); # push entire TmplToken object
$this->_set_cdata_mode( 0 );
}
last unless $this->cdata_mode_p;
$it .= $next->string;
}
if ($eof_p) {
$it = undef;
error_normal "Unexpected end of file while looking for "
. $this->cdata_close
. "\n", $this->line_number_start;
$this->_set_fatal( 1 );
$this->_set_syntaxerror( 1 );
}
if ($this->pcdata_mode_p) {
my $check = $it;
$check =~ s/$re_directive//gos;
warn_pedantic "Markup found in PCDATA\n", $this->line_number,
\$pedantic_error_markup_in_pcdata_p
if $check =~ /$re_tag_compat/s;
}
# PCDATA should be treated as text, not CDATA
# Actually it should be treated as TEXT_PARAMETRIZED :-(
$it = TmplToken->new( $it,
($this->pcdata_mode_p?
TmplTokenType::TEXT: TmplTokenType::CDATA),
$this->line_number, $this->filename )
if defined $it;
if ($this->js_mode_p) {
my $s0 = $it->string;
my @head = ();
my @tail = ();
if ($s0 =~ /^(\s*<!--\s*)(.*)(\s*--\s*>\s*)$/s) {
push @head, $1;
push @tail, $3;
$s0 = $2;
}
push @head, split_js $s0;
$it->set_js_data( identify_js_translatables(@head, @tail) );
}
$this->_set_pcdata_mode, 0;
$this->_set_cdata_close, undef unless !defined $it;
}
return $it;
}
sub _token_groupable1_p ($) { # as first token, groupable into TEXT_PARAMETRIZED
my($t) = @_;
return ($t->type == TmplTokenType::TEXT && $t->string !~ /^[,\.:\|\s]+$/is)
|| ($t->type == TmplTokenType::DIRECTIVE
&& $t->string =~ /^(?:$re_tmpl_var)$/os)
|| ($t->type == TmplTokenType::TAG
&& ($t->string =~ /^<(?:a|b|em|h[123456]|i|u)\b/is
|| ($t->string =~ /^<input\b/is
&& $t->attributes->{'type'}->[1] =~ /^(?:radio|text)$/is)
))
}
sub _token_groupable2_p ($) { # as other token, groupable into TEXT_PARAMETRIZED
my($t) = @_;
return ($t->type == TmplTokenType::TEXT && ($t->string =~ /^\s*$/s || $t->string !~ /^[\|\s]+$/is))
|| ($t->type == TmplTokenType::DIRECTIVE
&& $t->string =~ /^(?:$re_tmpl_var)$/os)
|| ($t->type == TmplTokenType::TAG
&& ($t->string =~ /^<\/?(?:a|b|em|h[123456]|i|u)\b/is
|| ($t->string =~ /^<input\b/is
&& $t->attributes->{'type'}->[1] =~ /^(?:radio|text)$/is)))
}
sub _quote_cformat ($) {
my($s) = @_;
$s =~ s/%/%%/g;
return $s;
}
sub string_canon ($) {
my($s) = @_;
if (1) { # FIXME
# Fold all whitespace into single blanks
$s =~ s/\s+/ /gs;
}
return $s;
}
sub _formalize_string_cformat ($) {
my($s) = @_;
return _quote_cformat string_canon $s;
}
sub _formalize ($) {
my($t) = @_;
return $t->type == TmplTokenType::DIRECTIVE? '%s':
$t->type == TmplTokenType::TEXT?
_formalize_string_cformat($t->string):
$t->type == TmplTokenType::TAG?
($t->string =~ /^<a\b/is? '<a>':
$t->string =~ /^<input\b/is? (
lc $t->attributes->{'type'}->[1] eq 'text' ? '%S':
'%p'):
_quote_cformat($t->string)):
_quote_cformat($t->string);
}
sub _optimize {
my $this = shift;
my @structure = @_;
my $undo_trailing_blanks = sub {
for (my $i = $#structure; $i >= 0; $i -= 1) {
last unless ($structure[$i]->type == TmplTokenType::TEXT && blank_p($structure[$i]->string)) ;#|| ($structure[$i]->type == TmplTokenType::TAG && $structure[$i]->string =~ /^<br\b/is);
# Queue element structure: [reanalysis-p, token]
push @{$this->{_queue}}, [1, pop @structure];
}
};
&$undo_trailing_blanks;
while (@structure >= 2) {
my $something_done_p = 0;
# FIXME: If the last token is a close tag but there are no tags
# FIXME: before it, drop the close tag back into the queue. This
# FIXME: is an ugly hack to get rid of "foo %s</h1>" type mess.
if (@structure >= 2
&& $structure[$#structure]->type == TmplTokenType::TAG
&& $structure[$#structure]->string =~ /^<\//s) {
my $has_other_tags_p = 0;
for (my $i = 0; $i < $#structure; $i += 1) {
$has_other_tags_p = 1
if $structure[$i]->type == TmplTokenType::TAG;
last if $has_other_tags_p;
}
if (!$has_other_tags_p) {
push @{$this->{_queue}}, [0, pop @structure]
&$undo_trailing_blanks;
$something_done_p = 1;
}
}
# FIXME: Do the same ugly hack for the last token being a ( or [
if (@structure >= 2
&& $structure[$#structure]->type == TmplTokenType::TEXT
&& $structure[$#structure]->string =~ /^[\(\[]$/) { # not )]
push @{$this->{_queue}}, [1, pop @structure];
&$undo_trailing_blanks;
$something_done_p = 1;
}
# FIXME: If the first token is an open tag, but there is no
# FIXME: corresponding close tag, "drop the open tag", i.e.,
# FIXME: requeue everything for reanalysis, except the frist tag. :-(
if (@structure >= 2
&& $structure[0]->type == TmplTokenType::TAG
&& $structure[0]->string =~ /^<([a-z0-9]+)/is
&& (my $tag = $1) !~ /^(?:br|hr|img|input)\b/is
) {
my $tag_open_count = 1;
for (my $i = 1; $i <= $#structure; $i += 1) {
if ($structure[$i]->type == TmplTokenType::TAG) {
if ($structure[$i]->string =~ /^<(\/?)$tag\b/is) {
$tag_open_count += ($1? -1: +1);
}
}
}
if ($tag_open_count > 0) {
for (my $i = $#structure; $i; $i -= 1) {
push @{$this->{_queue}}, [1, pop @structure];
}
$something_done_p = 1;
}
}
# FIXME: If the first token is an open tag, the last token is the
# FIXME: corresponding close tag, and there are no other close tags
# FIXME: inbetween, requeue the tokens from the second token on,
# FIXME: flagged as ok for re-analysis
if (@structure >= 3
&& $structure[0]->type == TmplTokenType::TAG
&& $structure[0]->string =~ /^<([a-z0-9]+)/is && (my $tag = $1)
&& $structure[$#structure]->type == TmplTokenType::TAG
&& $structure[$#structure]->string =~ /^<\/$1\s*>$/is) {
my $has_other_open_or_close_tags_p = 0;
for (my $i = 1; $i < $#structure; $i += 1) {
$has_other_open_or_close_tags_p = 1
if $structure[$i]->type == TmplTokenType::TAG
&& $structure[$i]->string =~ /^<\/?$tag\b/is;
last if $has_other_open_or_close_tags_p;
}
if (!$has_other_open_or_close_tags_p) {
for (my $i = $#structure; $i; $i -= 1) {
push @{$this->{_queue}}, [1, pop @structure];
}
$something_done_p = 1;
}
}
last if !$something_done_p;
}
return @structure;
}
sub looks_plausibly_like_groupable_text_p (@) {
my @structure = @_;
# The text would look plausibly groupable if all open tags are also closed.
my @tags = ();
my $error_p = 0;
for (my $i = 0; $i <= $#structure; $i += 1) {
if ($structure[$i]->type == TmplTokenType::TAG) {
my $form = $structure[$i]->string;
if ($form =~ /^<([A-Z0-9]+)/is) {
my $tag = lc($1);
if ($tag !~ /^(?:br|input)$/is && $form !~ /\/>$/is) {
push @tags, $tag;
}
} elsif ($form =~ /^<\/([A-Z0-9]+)/is) {
if (@tags && lc($1) eq $tags[$#tags]) {
pop @tags;
} else {
$error_p = 1;
}
}
} elsif ($structure[$i]->type != TmplTokenType::TEXT) {
$error_p = 1;
}
last if $error_p;
}
return !$error_p && !@tags;
}
sub next_token {
my $this = shift;
my $h = $this->_handle;
my $it;
$this->{_queue} = [] unless defined $this->{_queue};
# Elements in the queue are ordered pairs. The first in the ordered pair
# specifies whether we are allowed to reanalysis; the second is the token.
if (@{$this->{_queue}} && !$this->{_queue}->[$#{$this->{_queue}}]->[0]) {
$it = (pop @{$this->{_queue}})->[1];
} else {
if (@{$this->{_queue}}) {
$it = (pop @{$this->{_queue}})->[1];
} else {
$it = $this->_next_token_intermediate($h);
}
if (!$this->cdata_mode_p && $this->allow_cformat_p && defined $it
&& ($it->type == TmplTokenType::TEXT?
!blank_p( $it->string ): _token_groupable1_p( $it ))) {
my @structure = ( $it );
my @tags = ();
my $next = undef;
my($nonblank_text_p, $parametrized_p, $with_anchor_p, $with_input_p) = (0, 0, 0, 0);
if ($it->type == TmplTokenType::TEXT) {
$nonblank_text_p = 1 if !blank_p( $it->string );
} elsif ($it->type == TmplTokenType::DIRECTIVE) {
$parametrized_p = 1;
} elsif ($it->type == TmplTokenType::TAG && $it->string =~ /^<([A-Z0-9]+)/is) {
my $tag = lc($1);
push @tags, $tag if $tag !~ /^(?:br|input)$/i;
$with_anchor_p = 1 if $tag eq 'a';
$with_input_p = 1 if $tag eq 'input';
}
# We hate | and || in msgid strings, so we try to avoid them
for (my $i = 1, my $quit_p = 0, my $quit_next_p = ($it->type == TmplTokenType::TEXT && $it->string =~ /^\|+$/s);; $i += 1) {
if (@{$this->{_queue}}) {
$next = (pop @{$this->{_queue}})->[1];
} else {
$next = $this->_next_token_intermediate($h);
}
push @structure, $next; # for consistency (with initialization)
last unless defined $next && _token_groupable2_p( $next );
last if $quit_next_p;
if ($next->type == TmplTokenType::TEXT) {
$nonblank_text_p = 1 if !blank_p( $next->string );
$quit_p = 1 if $next->string =~ /^\|+$/s; # We hate | and ||
} elsif ($next->type == TmplTokenType::DIRECTIVE) {
$parametrized_p = 1;
} elsif ($next->type == TmplTokenType::TAG) {
if ($next->string =~ /^<([A-Z0-9]+)/is) {
my $tag = lc($1);
push @tags, $tag if $tag !~ /^(?:br|input)$/i;
$with_anchor_p = 1 if $tag eq 'a';
$with_input_p = 1 if $tag eq 'input';
} elsif ($next->string =~ /^<\/([A-Z0-9]+)/is) {
my $close = lc($1);
$quit_p = 1 unless @tags && $close eq $tags[$#tags];
$quit_next_p = 1 if $close =~ /^h\d$/;
pop @tags;
}
}
last if $quit_p;
}
# Undo the last token, allowing reanalysis
push @{$this->{_queue}}, [1, pop @structure];
# Simply it a bit more
@structure = $this->_optimize( @structure );
if (@structure < 2) {
# Nothing to do
;
} elsif ($nonblank_text_p && ($parametrized_p || $with_anchor_p || $with_input_p)) {
# Create the corresponding c-format string
my $string = join('', map { $_->string } @structure);
my $form = join('', map { _formalize $_ } @structure);
my($a_counter, $input_counter) = (0, 0);
$form =~ s/<a>/ $a_counter += 1, "<a$a_counter>" /egs;
$form =~ s/<input>/ $input_counter += 1, "<input$input_counter>" /egs;
$it = TmplToken->new($string, TmplTokenType::TEXT_PARAMETRIZED,
$it->line_number, $it->pathname);
$it->set_form( $form );
$it->set_children( @structure );
} elsif ($nonblank_text_p
&& looks_plausibly_like_groupable_text_p( @structure )
&& $structure[$#structure]->type == TmplTokenType::TEXT) {
# Combine the strings
my $string = join('', map { $_->string } @structure);
$it = TmplToken->new($string, TmplTokenType::TEXT,
$it->line_number, $it->pathname);;
} else {
# Requeue the tokens thus seen for re-emitting, allow reanalysis
for (;;) {
push @{$this->{_queue}}, [1, pop @structure];
last if !@structure;
}
$it = (pop @{$this->{_queue}})->[1];
}
}
}
if (defined $it && $it->type == TmplTokenType::TEXT) {
my $form = string_canon $it->string;
$it->set_form( $form );
}
return $it;
}
###############################################################################
# Other simple functions (These are not methods)
sub blank_p ($) {
my($s) = @_;
return $s =~ /^(?:\s|\ $re_end_entity|$re_tmpl_var)*$/os;
}
sub trim ($) {
my($s0) = @_;
my $l0 = length $s0;
my $s = $s0;
$s =~ s/^(\s|\ $re_end_entity)+//os; my $l1 = $l0 - length $s;
$s =~ s/(\s|\ $re_end_entity)+$//os; my $l2 = $l0 - $l1 - length $s;
return wantarray? (substr($s0, 0, $l1), $s, substr($s0, $l0 - $l2)): $s;
}
sub quote_po ($) {
my($s) = @_;
# Locale::PO->quote is buggy, it doesn't quote newlines :-/
$s =~ s/([\\"])/\\\1/gs;
$s =~ s/\n/\\n/g;
#$s =~ s/[\177-\377]/ sprintf("\\%03o", ord($&)) /egs;
return "\"$s\"";
}
# Some functions that shouldn't be here... should be moved out some time
sub parametrize ($$$$) {
my($fmt_0, $cformat_p, $t, $f) = @_;
my $it = '';
if ($cformat_p) {
my @params = $t->parameters_and_fields;
for (my $n = 0, my $fmt = $fmt_0; length $fmt;) {
if ($fmt =~ /^[^%]+/) {
$fmt = $';
$it .= $&;
} elsif ($fmt =~ /^%%/) {
$fmt = $';
$it .= '%';
} elsif ($fmt =~ /^%(?:(\d+)\$)?(?:(\d+)(?:\.(\d+))?)?s/s) {
$n += 1;
my($i, $width, $prec) = ((defined $1? $1: $n), $2, $3);
$fmt = $';
if (defined $width && defined $prec && !$width && !$prec) {
;
} elsif (defined $params[$i - 1]) {
my $param = $params[$i - 1];
warn_normal "$fmt_0: $&: Expected a TMPL_VAR, but found a "
. $param->type->to_string . "\n", undef
if $param->type != TmplTokenType::DIRECTIVE;
warn_normal "$fmt_0: $&: Unsupported "
. "field width or precision\n", undef
if defined $width || defined $prec;
warn_normal "$fmt_0: $&: Parameter $i not known", undef
unless defined $param;
$it .= defined $f? &$f( $param ): $param->string;
}
} elsif ($fmt =~ /^%(?:(\d+)\$)?(?:(\d+)(?:\.(\d+))?)?([pS])/s) {
$n += 1;
my($i, $width, $prec, $conv) = ((defined $1? $1: $n), $2, $3, $4);
$fmt = $';
my $param = $params[$i - 1];
if (!defined $param) {
warn_normal "$fmt_0: $&: Parameter $i not known", undef;
} else {
if ($param->type == TmplTokenType::TAG
&& $param->string =~ /^<input\b/is) {
my $type = defined $param->attributes?
lc($param->attributes->{'type'}->[1]): undef;
if ($conv eq 'S') {
warn_normal "$fmt_0: $&: Expected type=text, "
. "but found type=$type", undef
unless $type eq 'text';
} elsif ($conv eq 'p') {
warn_normal "$fmt_0: $&: Expected type=radio, "
. "but found type=$type", undef
unless $type eq 'radio';
}
} else {
warn_normal "$&: Expected an INPUT, but found a "
. $param->type->to_string . "\n", undef
}
warn_normal "$fmt_0: $&: Unsupported "
. "field width or precision\n", undef
if defined $width || defined $prec;
$it .= defined $f? &$f( $param ): $param->string;
}
} elsif ($fmt =~ /^%[^%a-zA-Z]*[a-zA-Z]/) {
$fmt = $';
$it .= $&;
die "$&: Unknown or unsupported format specification\n"; #XXX
} else {
die "$&: Completely confused parametrizing\n";#XXX
}
}
}
my @anchors = $t->anchors;
for (my $n = 0, my $fmt = $it, $it = ''; length $fmt;) {
if ($fmt =~ /^(?:(?!<a\d+>).)+/is) {
$fmt = $';
$it .= $&;
} elsif ($fmt =~ /^<a(\d+)>/is) {
$n += 1;
my $i = $1;
$fmt = $';
my $anchor = $anchors[$i - 1];
warn_normal "$&: Anchor $1 not found for msgid \"$fmt_0\"", undef #FIXME
unless defined $anchor;
$it .= $anchor->string;
} else {
die "Completely confused decoding anchors: $fmt\n";#XXX
}
}
return $it;
}
sub charset_canon ($) {
my($charset) = @_;
$charset = uc($charset);
$charset = "$1-$2" if $charset =~ /^(ISO|UTF)(\d.*)/i;
$charset = 'Big5' if $charset eq 'BIG5'; # "Big5" must be in mixed case
return $charset;
}
use vars qw( @latin1_utf8 );
@latin1_utf8 = (
"\302\200", "\302\201", "\302\202", "\302\203", "\302\204", "\302\205",