6 use VerboseWarnings qw( pedantic_p error_normal warn_normal warn_pedantic );
9 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
11 ###############################################################################
15 TmplTokenizer.pm - Simple-minded tokenizer class for HTML::Template .tmpl files
19 Because .tmpl files contains HTML::Template directives
20 that tend to confuse real parsers (e.g., HTML::Parse),
21 it might be better to create a customized scanner
22 to scan the template files for tokens.
23 This module is a simple-minded attempt at such a scanner.
27 ###############################################################################
34 use vars qw( $pedantic_attribute_error_in_nonpedantic_mode_p );
35 use vars qw( $pedantic_tmpl_var_use_in_nonpedantic_mode_p );
36 use vars qw( $pedantic_error_markup_in_pcdata_p );
38 ###############################################################################
41 use vars qw( $re_directive $re_tmpl_var $re_tmpl_var_escaped $re_tmpl_include );
42 use vars qw( $re_directive_control $re_tmpl_endif_endloop );
44 # $re_directive must not do any backreferences
45 $re_directive = q{<(?:(?i)(?:!--\s*)?\/?TMPL_(?:VAR|LOOP|INCLUDE|IF|ELSE|UNLESS)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
46 # TMPL_VAR or TMPL_INCLUDE
47 $re_tmpl_var = q{<(?:(?i)(?:!--\s*)?TMPL_(?:VAR)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
48 $re_tmpl_include = q{<(?:(?i)(?:!--\s*)?TMPL_(?:INCLUDE)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
49 # TMPL_VAR ESCAPE=1/HTML/URL
50 $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*(?:--)?)>};
51 # Any control flow directive
52 $re_directive_control = q{<(?:(?i)(?:!--\s*)?\/?TMPL_(?:LOOP|IF|ELSE|UNLESS)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
53 # /LOOP or /IF or /UNLESS
54 $re_tmpl_endif_endloop = q{<(?:(?i)(?:!--\s*)?\/TMPL_(?:LOOP|IF|UNLESS)(?:\s+(?:[a-zA-Z][-a-zA-Z0-9]*=)?(?:'[^']*'|"[^"]*"|[^\s<>]+))*\s*(?:--)?)>};
57 # Hideous stuff from subst.pl, slightly modified to use the above hideous stuff
58 # Note: The $re_tag's set $1 (<tag), $2 (>), and $3 (rest of string)
59 use vars qw( $re_comment $re_entity_name $re_end_entity $re_etag );
60 use vars qw( $re_tag_strict $re_tag_compat @re_tag );
63 my $etag = $compat? '>': '<>\/';
64 # This is no longer similar to the original regexp in subst.pl :-(
65 # Note that we don't want <> in compat mode; Mozilla knows about <
66 q{(<\/?(?:|(?:"(?:} . $re_directive . q{|[^"])*"|'(?:} . $re_directive . q{|[^'])*'|--(?:(?!--)(?:$re_directive)*.)*--|(?:}
68 . q{|(?!--)[^"'<>} . $etag . q{]))+))([} . $etag . q{]|(?=<))(.*)};
71 $re_comment = '(?:--(?:[^-]|-[^-])*--)';
72 $re_entity_name = '(?:[^&%#;<>\s]+)'; # NOTE: not really correct SGML
73 $re_end_entity = '(?:;|$|(?=\s))'; # semicolon or before-whitespace
74 $re_etag = q{(?:<\/?(?:"[^"]*"|'[^']*'|[^"'>\/])*[>\/])}; # end-tag
75 @re_tag = ($re_tag_strict, $re_tag_compat) = (re_tag(0), re_tag(1));
78 # End of the hideous stuff
80 use vars qw( $serial );
82 ###############################################################################
84 sub FATAL_P () {'fatal-p'}
85 sub SYNTAXERROR_P () {'syntaxerror-p'}
87 sub FILENAME () {'input'}
88 sub HANDLE () {'handle'}
90 sub READAHEAD () {'readahead'}
91 sub LINENUM_START () {'lc_0'}
93 sub CDATA_MODE_P () {'cdata-mode-p'}
94 sub CDATA_CLOSE () {'cdata-close'}
95 sub PCDATA_MODE_P () {'pcdata-mode-p'} # additional submode for CDATA
97 sub ALLOW_CFORMAT_P () {'allow-cformat-p'}
102 my $class = ref($this) || $this;
106 my $handle = sprintf('TMPLTOKENIZER%d', $serial);
110 open($handle, "<$input") || die "$input: $!\n";
112 $self->{+FILENAME} = $input;
113 $self->{+HANDLE} = $handle;
114 $self->{+READAHEAD} = [];
118 ###############################################################################
124 return $this->{+FILENAME};
129 return $this->{+HANDLE};
134 return $this->{+FATAL_P};
139 return $this->{+SYNTAXERROR_P};
142 sub has_readahead_p {
144 return @{$this->{+READAHEAD}};
147 sub _peek_readahead {
149 return $this->{+READAHEAD}->[$#{$this->{+READAHEAD}}];
152 sub line_number_start {
154 return $this->{+LINENUM_START};
159 return $this->{+LINENUM};
164 return $this->{+CDATA_MODE_P};
169 return $this->{+PCDATA_MODE_P};
174 return $this->{+CDATA_CLOSE};
177 sub allow_cformat_p {
179 return $this->{+ALLOW_CFORMAT_P};
186 $this->{+FATAL_P} = $_[0];
190 sub _set_syntaxerror {
192 $this->{+SYNTAXERROR_P} = $_[0];
196 sub _push_readahead {
198 push @{$this->{+READAHEAD}}, $_[0];
204 return pop @{$this->{+READAHEAD}};
207 sub _append_readahead {
209 $this->{+READAHEAD}->[$#{$this->{+READAHEAD}}] .= $_[0];
215 $this->{+READAHEAD}->[$#{$this->{+READAHEAD}}] = $_[0];
219 sub _increment_line_number {
221 $this->{+LINENUM} += 1;
225 sub _set_line_number_start {
227 $this->{+LINENUM_START} = $_[0];
231 sub _set_cdata_mode {
233 $this->{+CDATA_MODE_P} = $_[0];
237 sub _set_pcdata_mode {
239 $this->{+PCDATA_MODE_P} = $_[0];
243 sub _set_cdata_close {
245 $this->{+CDATA_CLOSE} = $_[0];
249 sub set_allow_cformat {
251 $this->{+ALLOW_CFORMAT_P} = $_[0];
255 ###############################################################################
257 sub _extract_attributes ($;$) {
261 $s = $1 if $s =~ /^<(?:(?!$re_directive_control)\S)+(.*)\/\S$/s # XML-style self-closing tags
262 || $s =~ /^<(?:(?!$re_directive_control)\S)+(.*)\S$/s; # SGML-style tags
264 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;) {
265 my($key, $val, $val_orig, $rest)
266 = ($1, (defined $3? $3: defined $4? $4: $5), $2, $');
268 $attr{+lc($key)} = [$key, $val, $val_orig, $i];
270 if ($val =~ /$re_tmpl_include/os) {
271 warn_normal "TMPL_INCLUDE in attribute: $val_orig\n", $lc;
272 } elsif ($val =~ /$re_tmpl_var/os && $val !~ /$re_tmpl_var_escaped/os) {
273 # XXX: we probably should not warn if key is "onclick" etc
274 # XXX: there's just no reasonable thing to suggest
275 my $suggest = ($key =~ /^(?:action|archive|background|cite|classid|codebase|data|datasrc|for|href|longdesc|profile|src|usemap)$/i? 'URL': 'HTML');
276 undef $suggest if $key =~ /^(?:onblur|onchange|onclick|ondblclick|onfocus|onkeydown|onkeypress|onkeyup|onload|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|onreset|onselect|onsubmit|onunload)$/i;
278 "Suggest ESCAPE=$suggest for TMPL_VAR in attribute \"$key\""
280 $lc, \$pedantic_tmpl_var_use_in_nonpedantic_mode_p
281 if defined $suggest && (pedantic_p || !$pedantic_tmpl_var_use_in_nonpedantic_mode_p);
282 } elsif ($val_orig !~ /^['"]/) {
283 my $t = $val; $t =~ s/$re_directive_control//os;
285 "Unquoted attribute contains character(s) that should be quoted"
287 $lc, \$pedantic_attribute_error_in_nonpedantic_mode_p
288 if $t =~ /[^-\.A-Za-z0-9]/s;
291 my $s2 = $s; $s2 =~ s/$re_tmpl_endif_endloop//g; # for the next check
292 if ($s2 =~ /\S/s) { # should never happen
293 if ($s =~ /^([^\n]*)\n/s) { # this is even worse
294 error_normal("Completely confused while extracting attributes: $1", $lc);
295 error_normal((scalar(split(/\n/, $s)) - 1) . " more line(s) not shown.", undef);
296 $this->_set_fatal( 1 );
298 # There's something wrong with the attribute syntax.
299 # We might be able to deduce a likely cause by looking more.
300 if ($s =~ /^[a-z0-9]/is && "<foo $s>" =~ /^$re_tag_compat$/s) {
301 warn_normal "Probably missing whitespace before or missing quotation mark near: $s\n", $lc;
303 warn_normal "Strange attribute syntax: $s\n", $lc;
310 sub _next_token_internal {
315 $this->_pop_readahead if $this->has_readahead_p
316 && !ref $this->_peek_readahead
317 && !length $this->_peek_readahead;
318 if (!$this->has_readahead_p) {
319 my $next = scalar <$h>;
320 $eof_p = !defined $next;
322 $this->_increment_line_number;
323 $this->_push_readahead( $next );
326 $this->_set_line_number_start( $this->line_number ); # remember 1st line num
327 if ($this->has_readahead_p && ref $this->_peek_readahead) { # TmplToken obj.
328 ($it, $kind) = ($this->_pop_readahead, undef);
329 } elsif ($eof_p && !$this->has_readahead_p) { # nothing left to do
331 } elsif ($this->_peek_readahead =~ /^\s+/s) { # whitespace
332 ($kind, $it) = (TmplTokenType::TEXT, $&);
333 $this->_set_readahead( $' );
334 # FIXME the following (the [<\s] part) is an unreliable HACK :-(
335 } elsif ($this->_peek_readahead =~ /^(?:[^<]|<[<\s])*(?:[^<\s])/s) { # non-space normal text
336 ($kind, $it) = (TmplTokenType::TEXT, $&);
337 $this->_set_readahead( $' );
338 warn_normal "Unescaped < in $it\n", $this->line_number_start
339 if !$this->cdata_mode_p && $it =~ /</s;
340 } else { # tag/declaration/processing instruction
342 my $bad_comment_p = 0;
343 for (my $cdata_close = $this->cdata_close;;) {
344 if ($this->cdata_mode_p) {
345 my $next = $this->_pop_readahead;
346 if ($next =~ /^$cdata_close/is) {
347 ($kind, $it) = (TmplTokenType::TAG, $&);
348 $this->_push_readahead( $' );
350 } elsif ($next =~ /^((?:(?!$cdata_close).)+)($cdata_close)/is) {
351 ($kind, $it) = (TmplTokenType::TEXT, $1);
352 $this->_push_readahead( "$2$'" );
355 ($kind, $it) = (TmplTokenType::TEXT, $next);
358 } elsif ($this->_peek_readahead =~ /^$re_tag_compat/os) {
359 # If we detect a "closed start tag" but we know that the
360 # following token looks like a TMPL_VAR, don't stop
361 my($head, $tail, $post) = ($1, $2, $3);
362 if ($tail eq '' && $post =~ $re_tmpl_var) {
363 # Don't bother to show the warning if we're too confused
364 # FIXME. There's no method for _closed_start_tag_warning
365 if (!defined $this->{'_closed_start_tag_warning'}
366 || ($this->{'_closed_start_tag_warning'}->[0] eq $head
367 && $this->{'_closed_start_tag_warning'}->[1] != $this->line_number - 1)) {
368 warn_normal "Possible SGML \"closed start tag\" notation: $head<\n", $this->line_number
369 if split(/\n/, $head) < 10;
371 $this->{'_closed_start_tag_warning'} = [$head, $this->line_number];
373 ($kind, $it) = (TmplTokenType::TAG, "$head>");
374 $this->_set_readahead( $post );
376 warn_normal "SGML \"closed start tag\" notation: $head<\n", $this->line_number if $tail eq '';
378 } elsif ($this->_peek_readahead =~ /^<!--(?:(?!-->)$re_directive*.)*-->/os) {
379 ($kind, $it) = (TmplTokenType::COMMENT, $&);
380 $this->_set_readahead( $' );
385 my $next = scalar <$h>;
386 $eof_p = !defined $next;
388 $this->_increment_line_number;
389 $this->_append_readahead( $next );
391 if ($kind ne TmplTokenType::TAG) {
393 } elsif ($it =~ /^<!/) {
394 $kind = TmplTokenType::DECL;
395 $kind = TmplTokenType::COMMENT if $it =~ /^<!--(?:(?!-->).)*-->/;
396 if ($kind == TmplTokenType::COMMENT && $it =~ /^<!--\s*#include/s) {
397 warn_normal "Apache #include directive found instead of HTML::Template <TMPL_INCLUDE> directive", $this->line_number_start;
399 } elsif ($it =~ /^<\?/) {
400 $kind = TmplTokenType::PI;
402 if ($it =~ /^$re_directive/ios && !$this->cdata_mode_p) {
403 $kind = TmplTokenType::DIRECTIVE;
404 } elsif ($bad_comment_p) {
405 warn_normal sprintf("Syntax error in comment: %s\n", $it),
406 $this->line_number_start;
407 $this->_set_syntaxerror( 1 );
409 if (!$ok_p && $eof_p) {
410 ($kind, $it) = (TmplTokenType::UNKNOWN, $this->_peek_readahead);
411 $this->_set_readahead, undef;
412 $this->_set_syntaxerror( 1 );
415 warn_normal "Unrecognizable token found: "
416 . (split(/\n/, $it) < 10? $it: '(too confused to show details)')
417 . "\n", $this->line_number_start
418 if $kind == TmplTokenType::UNKNOWN;
419 return defined $it? (ref $it? $it: TmplToken->new($it, $kind, $this->line_number, $this->filename)): undef;
422 sub _next_token_intermediate {
424 my $h = $this->_handle;
426 if (!$this->cdata_mode_p) {
427 $it = $this->_next_token_internal($h);
428 if (defined $it && $it->type == TmplTokenType::TAG) {
429 if ($it->string =~ /^<(script|style|textarea)\b/is) {
430 $this->_set_cdata_mode( 1 );
431 $this->_set_cdata_close( "</$1\\s*>" );
432 $this->_set_pcdata_mode( 0 );
433 # } elsif ($it->string =~ /^<(title)\b/is) {
434 # $this->_set_cdata_mode( 1 );
435 # $this->_set_cdata_close( "</$1\\s*>" );
436 # $this->_set_pcdata_mode( 1 );
438 $it->set_attributes( $this->_extract_attributes($it->string, $it->line_number) );
442 for ($it = '', my $cdata_close = $this->cdata_close;;) {
443 my $next = $this->_next_token_internal($h);
444 $eof_p = !defined $next;
446 if (defined $next && $next->string =~ /$cdata_close/is) {
447 $this->_push_readahead( $next ); # push entire TmplToken object
448 $this->_set_cdata_mode( 0 );
450 last unless $this->cdata_mode_p;
451 $it .= $next->string;
455 error_normal "Unexpected end of file while looking for "
457 . "\n", $this->line_number_start;
458 $this->_set_fatal( 1 );
459 $this->_set_syntaxerror( 1 );
461 if ($this->pcdata_mode_p) {
463 $check =~ s/$re_directive//gos;
464 warn_pedantic "Markup found in PCDATA\n", $this->line_number,
465 \$pedantic_error_markup_in_pcdata_p
466 if $check =~ /$re_tag_compat/s;
468 # PCDATA should be treated as text, not CDATA
469 # Actually it should be treated as TEXT_PARAMETRIZED :-(
470 $it = TmplToken->new( $it,
471 ($this->pcdata_mode_p?
472 TmplTokenType::TEXT: TmplTokenType::CDATA),
475 $this->_set_pcdata_mode, 0;
476 $this->_set_cdata_close, undef unless !defined $it;
481 sub _token_groupable1_p ($) { # as first token, groupable into TEXT_PARAMETRIZED
483 return ($t->type == TmplTokenType::TEXT && $t->string !~ /^[,\.:\|\s]+$/is)
484 || ($t->type == TmplTokenType::DIRECTIVE
485 && $t->string =~ /^(?:$re_tmpl_var)$/os)
486 || ($t->type == TmplTokenType::TAG
487 && ($t->string =~ /^<(?:a|b|em|h[123456]|i|u)\b/is
488 || ($t->string =~ /^<input\b/is
489 && $t->attributes->{'type'}->[1] =~ /^(?:radio|text)$/is)
493 sub _token_groupable2_p ($) { # as other token, groupable into TEXT_PARAMETRIZED
495 return ($t->type == TmplTokenType::TEXT && ($t->string =~ /^\s*$/s || $t->string !~ /^[\|\s]+$/is))
496 || ($t->type == TmplTokenType::DIRECTIVE
497 && $t->string =~ /^(?:$re_tmpl_var)$/os)
498 || ($t->type == TmplTokenType::TAG
499 && ($t->string =~ /^<\/?(?:a|b|em|h[123456]|i|u)\b/is
500 || ($t->string =~ /^<input\b/is
501 && $t->attributes->{'type'}->[1] =~ /^(?:radio|text)$/is)))
504 sub _quote_cformat ($) {
510 sub string_canon ($) {
513 # Fold all whitespace into single blanks
519 sub _formalize_string_cformat ($) {
521 return _quote_cformat string_canon $s;
526 return $t->type == TmplTokenType::DIRECTIVE? '%s':
527 $t->type == TmplTokenType::TEXT?
528 _formalize_string_cformat($t->string):
529 $t->type == TmplTokenType::TAG?
530 ($t->string =~ /^<a\b/is? '<a>':
531 $t->string =~ /^<input\b/is? (
532 lc $t->attributes->{'type'}->[1] eq 'text' ? '%S':
534 _quote_cformat($t->string)):
535 _quote_cformat($t->string);
541 my $undo_trailing_blanks = sub {
542 for (my $i = $#structure; $i >= 0; $i -= 1) {
543 last if $structure[$i]->type != TmplTokenType::TEXT;
544 last if !blank_p($structure[$i]->string);
545 # Queue element structure: [reanalysis-p, token]
546 push @{$this->{_queue}}, [1, pop @structure];
549 &$undo_trailing_blanks;
550 while (@structure >= 2) {
551 my $something_done_p = 0;
552 # FIXME: If the last token is a close tag but there are no tags
553 # FIXME: before it, drop the close tag back into the queue. This
554 # FIXME: is an ugly hack to get rid of "foo %s</h1>" type mess.
556 && $structure[$#structure]->type == TmplTokenType::TAG
557 && $structure[$#structure]->string =~ /^<\//s) {
558 my $has_other_tags_p = 0;
559 for (my $i = 0; $i < $#structure; $i += 1) {
560 $has_other_tags_p = 1
561 if $structure[$i]->type == TmplTokenType::TAG;
562 last if $has_other_tags_p;
564 if (!$has_other_tags_p) {
565 push @{$this->{_queue}}, [0, pop @structure]
566 &$undo_trailing_blanks;
567 $something_done_p = 1;
570 # FIXME: Do the same ugly hack for the last token being a ( or [
572 && $structure[$#structure]->type == TmplTokenType::TEXT
573 && $structure[$#structure]->string =~ /^[\(\[]$/) { # not )]
574 push @{$this->{_queue}}, [1, pop @structure];
575 &$undo_trailing_blanks;
576 $something_done_p = 1;
578 # FIXME: If the first token is an open tag, the last token is the
579 # FIXME: corresponding close tag, and there are no other close tags
580 # FIXME: inbetween, requeue the tokens from the second token on,
581 # FIXME: flagged as ok for re-analysis
583 && $structure[0]->type == TmplTokenType::TAG
584 && $structure[0]->string =~ /^<([a-z0-9])/is && (my $tag = $1)
585 && $structure[$#structure]->type == TmplTokenType::TAG
586 && $structure[$#structure]->string =~ /^<\/$1\s*>$/is) {
587 my $has_other_open_or_close_tags_p = 0;
588 for (my $i = 1; $i < $#structure; $i += 1) {
589 $has_other_open_or_close_tags_p = 1
590 if $structure[$i]->type == TmplTokenType::TAG
591 && $structure[$i]->string =~ /^<\/?$tag\b/is;
592 last if $has_other_open_or_close_tags_p;
594 if (!$has_other_open_or_close_tags_p) {
595 for (my $i = $#structure; $i; $i -= 1) {
596 push @{$this->{_queue}}, [1, pop @structure];
598 $something_done_p = 1;
601 last if !$something_done_p;
606 sub looks_plausibly_like_groupable_text_p (@) {
608 # The text would look plausibly groupable if all open tags are also closed.
611 for (my $i = 0; $i <= $#structure; $i += 1) {
612 if ($structure[$i]->type == TmplTokenType::TAG) {
613 if ($structure[$i]->string =~ /^<([A-Z0-9]+)/is) {
615 push @tags, $tag unless $tag =~ /^<(?:input)/is
617 } elsif ($structure[$i]->string =~ /^<\/([A-Z0-9]+)/is) {
618 if (@tags && lc($1) eq $tags[$#tags]) {
624 } elsif ($structure[$i]->type != TmplTokenType::TEXT) {
629 return !$error_p && !@tags;
634 my $h = $this->_handle;
636 $this->{_queue} = [] unless defined $this->{_queue};
638 # Elements in the queue are ordered pairs. The first in the ordered pair
639 # specifies whether we are allowed to reanalysis; the second is the token.
640 if (@{$this->{_queue}} && !$this->{_queue}->[$#{$this->{_queue}}]->[0]) {
641 $it = (pop @{$this->{_queue}})->[1];
643 if (@{$this->{_queue}}) {
644 $it = (pop @{$this->{_queue}})->[1];
646 $it = $this->_next_token_intermediate($h);
648 if (!$this->cdata_mode_p && $this->allow_cformat_p && defined $it
649 && ($it->type == TmplTokenType::TEXT?
650 !blank_p( $it->string ): _token_groupable1_p( $it ))) {
651 my @structure = ( $it );
654 my($nonblank_text_p, $parametrized_p, $with_anchor_p, $with_input_p) = (0, 0, 0, 0);
655 if ($it->type == TmplTokenType::TEXT) {
656 $nonblank_text_p = 1 if !blank_p( $it->string );
657 } elsif ($it->type == TmplTokenType::DIRECTIVE) {
659 } elsif ($it->type == TmplTokenType::TAG && $it->string =~ /^<([A-Z0-9]+)/is) {
661 $with_anchor_p = 1 if lc($1) eq 'a';
662 $with_input_p = 1 if lc($1) eq 'input';
664 # We hate | and || in msgid strings, so we try to avoid them
665 for (my $i = 1, my $quit_p = 0, my $quit_next_p = ($it->type == TmplTokenType::TEXT && $it->string =~ /^\|+$/s);; $i += 1) {
666 if (@{$this->{_queue}}) {
667 $next = (pop @{$this->{_queue}})->[1];
669 $next = $this->_next_token_intermediate($h);
671 push @structure, $next; # for consistency (with initialization)
672 last unless defined $next && _token_groupable2_p( $next );
673 last if $quit_next_p;
674 if ($next->type == TmplTokenType::TEXT) {
675 $nonblank_text_p = 1 if !blank_p( $next->string );
676 $quit_p = 1 if $next->string =~ /^\|+$/s; # We hate | and ||
677 } elsif ($next->type == TmplTokenType::DIRECTIVE) {
679 } elsif ($next->type == TmplTokenType::TAG) {
680 if ($next->string =~ /^<([A-Z0-9]+)/is) {
681 my $candidate = lc($1);
682 push @tags, $candidate
683 unless $candidate =~ /^(?:input)$/is;
684 $with_anchor_p = 1 if lc($1) eq 'a';
685 $with_input_p = 1 if lc($1) eq 'input';
686 } elsif ($next->string =~ /^<\/([A-Z0-9]+)/is) {
688 $quit_p = 1 unless @tags && $close eq $tags[$#tags];
689 $quit_next_p = 1 if $close =~ /^h\d$/;
695 # Undo the last token, allowing reanalysis
696 push @{$this->{_queue}}, [1, pop @structure];
697 # Simply it a bit more
698 @structure = $this->_optimize( @structure );
699 if (@structure < 2) {
702 } elsif ($nonblank_text_p && ($parametrized_p || $with_anchor_p || $with_input_p)) {
703 # Create the corresponding c-format string
704 my $string = join('', map { $_->string } @structure);
705 my $form = join('', map { _formalize $_ } @structure);
706 my($a_counter, $input_counter) = (0, 0);
707 $form =~ s/<a>/ $a_counter += 1, "<a$a_counter>" /egs;
708 $form =~ s/<input>/ $input_counter += 1, "<input$input_counter>" /egs;
709 $it = TmplToken->new($string, TmplTokenType::TEXT_PARAMETRIZED,
710 $it->line_number, $it->pathname);
711 $it->set_form( $form );
712 $it->set_children( @structure );
713 } elsif ($nonblank_text_p
714 && looks_plausibly_like_groupable_text_p( @structure )
715 && $structure[$#structure]->type == TmplTokenType::TEXT) {
716 # Combine the strings
717 my $string = join('', map { $_->string } @structure);
718 $it = TmplToken->new($string, TmplTokenType::TEXT,
719 $it->line_number, $it->pathname);;
721 # Requeue the tokens thus seen for re-emitting, allow reanalysis
723 push @{$this->{_queue}}, [1, pop @structure];
726 $it = (pop @{$this->{_queue}})->[1];
730 if (defined $it && $it->type == TmplTokenType::TEXT) {
731 my $form = string_canon $it->string;
732 $it->set_form( $form );
737 ###############################################################################
739 # Other simple functions (These are not methods)
743 return $s =~ /^(?:\s|\ $re_end_entity|$re_tmpl_var)*$/os;
750 $s =~ s/^(\s|\ $re_end_entity)+//os; my $l1 = $l0 - length $s;
751 $s =~ s/(\s|\ $re_end_entity)+$//os; my $l2 = $l0 - $l1 - length $s;
752 return wantarray? (substr($s0, 0, $l1), $s, substr($s0, $l0 - $l2)): $s;
757 # Locale::PO->quote is buggy, it doesn't quote newlines :-/
758 $s =~ s/([\\"])/\\\1/gs;
760 #$s =~ s/[\177-\377]/ sprintf("\\%03o", ord($&)) /egs;
764 # Some functions that shouldn't be here... should be moved out some time
765 sub parametrize ($$$$) {
766 my($fmt_0, $cformat_p, $t, $f) = @_;
769 my @params = $t->parameters_and_fields;
770 for (my $n = 0, my $fmt = $fmt_0; length $fmt;) {
771 if ($fmt =~ /^[^%]+/) {
774 } elsif ($fmt =~ /^%%/) {
777 } elsif ($fmt =~ /^%(?:(\d+)\$)?(?:(\d+)(?:\.(\d+))?)?s/s) {
779 my($i, $width, $prec) = ((defined $1? $1: $n), $2, $3);
781 if (defined $width && defined $prec && !$width && !$prec) {
783 } elsif (defined $params[$i - 1]) {
784 my $param = $params[$i - 1];
785 warn_normal "$fmt_0: $&: Expected a TMPL_VAR, but found a "
786 . $param->type->to_string . "\n", undef
787 if $param->type != TmplTokenType::DIRECTIVE;
788 warn_normal "$fmt_0: $&: Unsupported "
789 . "field width or precision\n", undef
790 if defined $width || defined $prec;
791 warn_normal "$fmt_0: $&: Parameter $i not known", undef
792 unless defined $param;
793 $it .= defined $f? &$f( $param ): $param->string;
795 } elsif ($fmt =~ /^%(?:(\d+)\$)?(?:(\d+)(?:\.(\d+))?)?([pS])/s) {
797 my($i, $width, $prec, $conv) = ((defined $1? $1: $n), $2, $3, $4);
800 my $param = $params[$i - 1];
801 if (!defined $param) {
802 warn_normal "$fmt_0: $&: Parameter $i not known", undef;
804 if ($param->type == TmplTokenType::TAG
805 && $param->string =~ /^<input\b/is) {
806 my $type = defined $param->attributes?
807 lc($param->attributes->{'type'}->[1]): undef;
809 warn_normal "$fmt_0: $&: Expected type=text, "
810 . "but found type=$type", undef
811 unless $type eq 'text';
812 } elsif ($conv eq 'p') {
813 warn_normal "$fmt_0: $&: Expected type=radio, "
814 . "but found type=$type", undef
815 unless $type eq 'radio';
818 warn_normal "$&: Expected an INPUT, but found a "
819 . $param->type->to_string . "\n", undef
821 warn_normal "$fmt_0: $&: Unsupported "
822 . "field width or precision\n", undef
823 if defined $width || defined $prec;
824 $it .= defined $f? &$f( $param ): $param->string;
826 } elsif ($fmt =~ /^%[^%a-zA-Z]*[a-zA-Z]/) {
829 die "$&: Unknown or unsupported format specification\n"; #XXX
831 die "$&: Completely confused parametrizing\n";#XXX
835 my @anchors = $t->anchors;
836 for (my $n = 0, my $fmt = $it, $it = ''; length $fmt;) {
837 if ($fmt =~ /^(?:(?!<a\d+>).)+/is) {
840 } elsif ($fmt =~ /^<a(\d+)>/is) {
844 my $anchor = $anchors[$i - 1];
845 warn_normal "$&: Anchor $1 not found for msgid \"$fmt_0\"", undef #FIXME
846 unless defined $anchor;
847 $it .= $anchor->string;
849 die "Completely confused decoding anchors: $fmt\n";#XXX
855 sub charset_canon ($) {
857 $charset = uc($charset);
858 $charset = "$1-$2" if $charset =~ /^(ISO|UTF)(\d.*)/i;
859 $charset = 'Big5' if $charset eq 'BIG5'; # "Big5" must be in mixed case
863 use vars qw( @latin1_utf8 );
865 "\302\200", "\302\201", "\302\202", "\302\203", "\302\204", "\302\205",
866 "\302\206", "\302\207", "\302\210", "\302\211", "\302\212", "\302\213",
867 "\302\214", "\302\215", undef, undef, "\302\220", "\302\221",
868 "\302\222", "\302\223", "\302\224", "\302\225", "\302\226", "\302\227",
869 "\302\230", "\302\231", "\302\232", "\302\233", "\302\234", "\302\235",
870 "\302\236", "\302\237", "\302\240", "\302\241", "\302\242", "\302\243",
871 "\302\244", "\302\245", "\302\246", "\302\247", "\302\250", "\302\251",
872 "\302\252", "\302\253", "\302\254", "\302\255", "\302\256", "\302\257",
873 "\302\260", "\302\261", "\302\262", "\302\263", "\302\264", "\302\265",
874 "\302\266", "\302\267", "\302\270", "\302\271", "\302\272", "\302\273",
875 "\302\274", "\302\275", "\302\276", "\302\277", "\303\200", "\303\201",
876 "\303\202", "\303\203", "\303\204", "\303\205", "\303\206", "\303\207",
877 "\303\210", "\303\211", "\303\212", "\303\213", "\303\214", "\303\215",
878 "\303\216", "\303\217", "\303\220", "\303\221", "\303\222", "\303\223",
879 "\303\224", "\303\225", "\303\226", "\303\227", "\303\230", "\303\231",
880 "\303\232", "\303\233", "\303\234", "\303\235", "\303\236", "\303\237",
881 "\303\240", "\303\241", "\303\242", "\303\243", "\303\244", "\303\245",
882 "\303\246", "\303\247", "\303\250", "\303\251", "\303\252", "\303\253",
883 "\303\254", "\303\255", "\303\256", "\303\257", "\303\260", "\303\261",
884 "\303\262", "\303\263", "\303\264", "\303\265", "\303\266", "\303\267",
885 "\303\270", "\303\271", "\303\272", "\303\273", "\303\274", "\303\275",
886 "\303\276", "\303\277" );
888 sub charset_convert ($$$) {
889 my($s, $charset_in, $charset_out) = @_;
890 if ($s !~ /[\200-\377]/s) { # FIXME: don't worry about iso2022 for now
892 } elsif ($charset_in eq 'ISO-8859-1' && $charset_out eq 'UTF-8') {
893 $s =~ s/[\200-\377]/ $latin1_utf8[ord($&) - 128] /egs;
894 } elsif ($charset_in ne $charset_out) {
895 VerboseWarnings::warn_normal "conversion from $charset_in to $charset_out is not supported\n", undef;
900 ###############################################################################
904 In addition to the basic scanning, this class will also perform
911 Emulation of c-format strings (see below)
915 Display of warnings for certain things that affects either the
916 ability of this class to yield correct output, or things that
917 are known to cause the original template to cause trouble.
921 Automatic correction of some of the things warned about
922 (e.g., SGML "closed start tag" notation).
926 =head2 c-format strings emulation
928 Because English word order is not universal, a simple extraction
929 of translatable strings may yield some strings like "Accounts for"
930 or ambiguous strings like "in". This makes the resulting strings
931 difficult to translate, but does not affect all languages alike.
932 For example, Chinese (with a somewhat different word order) would
933 be hit harder, but French would be relatively unaffected.
935 To overcome this problem, the scanner can be configured to detect
936 patterns with <TMPL_VAR> directives (as well as certain HTML tags),
937 and try to construct a larger pattern that will appear in the PO
938 file as c-format strings with %s placeholders. This additional
939 step allows the translator to deal with cases where word order
940 is different (replacing %s with %1$s, %2$s, etc.), or when certain
941 words will require certain inflectional suffixes in sentences.
943 Because this is an incompatible change, this mode must be explicitly
944 turned on using the set_cformat(1) method call.
946 =head2 The flag characters
948 The character % is followed by zero or more of the following flags:
954 The value comes from HTML <INPUT> elements.
955 This abuse of the flag character is somewhat reasonable,
956 since TMPL_VAR and INPUT are both variables, but of different kinds.
960 =head2 The field width and precision
962 An optional 0.0 can be specified for %s to specify
963 that the <TMPL_VAR> should be suppressed.
965 =head2 The conversion specifier
971 Specifies any input field that is neither text nor hidden
972 (which currently mean radio buttons).
973 The p conversion specifier is chosen because this does not
974 evoke any certain sensible data type.
978 Specifies a text input field (<INPUT TYPE=TEXT>).
979 This use of the o conversion specifier is somewhat reasonable,
980 since text input fields contain values of undeterminable type,
981 which can be treated as strings.
985 Specifies a <TMPL_VAR>.
986 This use of the o conversion specifier is somewhat reasonable,
987 since <TMPL_VAR> denotes values of undeterminable type, which
988 can be treated as strings.
994 There is no code to save the tag name anywhere in the scanned token.
996 The use of <AI<i>> to stand for the I<i>th anchor
997 is not very well thought out.
998 Some abuse of c-format specifies might have been more appropriate.
1002 This tokenizer is mostly based
1003 on Ambrose's hideous Perl script known as subst.pl.