X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=lib%2FCGI%2FEx%2FTemplate.pm;h=48e900a44f7dc8f66b128a683e8475a3c4ceeca9;hb=8a1796477c5a835d8c124cfa8504909dc786d93b;hp=76cae387f68d0f7a8501bbadfe1336ff8fb4a784;hpb=85070b46d0a93ddbeef07341421adb8389a55418;p=chaz%2Fp5-CGI-Ex diff --git a/lib/CGI/Ex/Template.pm b/lib/CGI/Ex/Template.pm index 76cae38..48e900a 100644 --- a/lib/CGI/Ex/Template.pm +++ b/lib/CGI/Ex/Template.pm @@ -1,92 +1,3311 @@ package CGI::Ex::Template; +###----------------------------------------------------------------### +# See the perldoc in CGI/Ex/Template.pod +# Copyright 2007 - Paul Seamons # +# Distributed under the Perl Artistic License without warranty # +###----------------------------------------------------------------### + use strict; -use vars qw(@INCLUDE_PATH $CONTENT_SUBDIR); -use base qw(Template); +use constant trace => $ENV{'CET_TRACE'} || 0; # enable for low level tracing +use vars qw($VERSION + $TAGS + $SCALAR_OPS $HASH_OPS $LIST_OPS $FILTER_OPS $VOBJS + $DIRECTIVES $QR_DIRECTIVE + + $OPERATORS + $OP_DISPATCH + $OP_ASSIGN + $OP + $OP_PREFIX + $OP_POSTFIX + $OP_TERNARY + + $QR_OP + $QR_OP_PREFIX + $QR_OP_ASSIGN + + $QR_COMMENTS + $QR_FILENAME + $QR_NUM + $QR_AQ_NOTDOT + $QR_AQ_SPACE + $QR_PRIVATE + + $PACKAGE_EXCEPTION $PACKAGE_ITERATOR $PACKAGE_CONTEXT $PACKAGE_STASH $PACKAGE_PERL_HANDLE + $WHILE_MAX + $EXTRA_COMPILE_EXT + $DEBUG + ); + +BEGIN { + $VERSION = '2.09'; + + $PACKAGE_EXCEPTION = 'CGI::Ex::Template::Exception'; + $PACKAGE_ITERATOR = 'CGI::Ex::Template::Iterator'; + $PACKAGE_CONTEXT = 'CGI::Ex::Template::_Context'; + $PACKAGE_STASH = 'CGI::Ex::Template::_Stash'; + $PACKAGE_PERL_HANDLE = 'CGI::Ex::Template::EvalPerlHandle'; + + $TAGS = { + default => ['[%', '%]'], # default + template => ['[%', '%]'], # default + metatext => ['%%', '%%'], # Text::MetaText + star => ['[*', '*]'], # TT alternate + php => ['', '?>'], # PHP + asp => ['<%', '%>'], # ASP + mason => ['<%', '>' ], # HTML::Mason + html => [''], # HTML comments + }; + + $SCALAR_OPS = { + '0' => sub { $_[0] }, + as => \&vmethod_as_scalar, + chunk => \&vmethod_chunk, + collapse => sub { local $_ = $_[0]; s/^\s+//; s/\s+$//; s/\s+/ /g; $_ }, + defined => sub { defined $_[0] ? 1 : '' }, + indent => \&vmethod_indent, + int => sub { local $^W; int $_[0] }, + fmt => \&vmethod_as_scalar, + 'format' => \&vmethod_format, + hash => sub { {value => $_[0]} }, + html => sub { local $_ = $_[0]; s/&/&/g; s/</g; s/>/>/g; s/\"/"/g; $_ }, + item => sub { $_[0] }, + lcfirst => sub { lcfirst $_[0] }, + length => sub { defined($_[0]) ? length($_[0]) : 0 }, + list => sub { [$_[0]] }, + lower => sub { lc $_[0] }, + match => \&vmethod_match, + new => sub { defined $_[0] ? $_[0] : '' }, + null => sub { '' }, + rand => sub { local $^W; rand shift }, + remove => sub { vmethod_replace(shift, shift, '', 1) }, + repeat => \&vmethod_repeat, + replace => \&vmethod_replace, + search => sub { my ($str, $pat) = @_; return $str if ! defined $str || ! defined $pat; return $str =~ /$pat/ }, + size => sub { 1 }, + split => \&vmethod_split, + stderr => sub { print STDERR $_[0]; '' }, + substr => \&vmethod_substr, + trim => sub { local $_ = $_[0]; s/^\s+//; s/\s+$//; $_ }, + ucfirst => sub { ucfirst $_[0] }, + upper => sub { uc $_[0] }, + uri => \&vmethod_uri, + }; + + $FILTER_OPS = { # generally - non-dynamic filters belong in scalar ops + eval => [\&filter_eval, 1], + evaltt => [\&filter_eval, 1], + file => [\&filter_redirect, 1], + redirect => [\&filter_redirect, 1], + }; + + $LIST_OPS = { + as => \&vmethod_as_list, + defined => sub { return 1 if @_ == 1; defined $_[0]->[ defined($_[1]) ? $_[1] : 0 ] }, + first => sub { my ($ref, $i) = @_; return $ref->[0] if ! $i; return [@{$ref}[0 .. $i - 1]]}, + fmt => \&vmethod_as_list, + grep => sub { local $^W; my ($ref, $pat) = @_; [grep {/$pat/} @$ref] }, + hash => sub { local $^W; my $list = shift; return {@$list} if ! @_; my $i = shift || 0; return {map {$i++ => $_} @$list} }, + import => sub { my $ref = shift; push @$ref, grep {defined} map {ref eq 'ARRAY' ? @$_ : undef} @_; '' }, + item => sub { $_[0]->[ $_[1] || 0 ] }, + join => sub { my ($ref, $join) = @_; $join = ' ' if ! defined $join; local $^W; return join $join, @$ref }, + last => sub { my ($ref, $i) = @_; return $ref->[-1] if ! $i; return [@{$ref}[-$i .. -1]]}, + list => sub { $_[0] }, + max => sub { local $^W; $#{ $_[0] } }, + merge => sub { my $ref = shift; return [ @$ref, grep {defined} map {ref eq 'ARRAY' ? @$_ : undef} @_ ] }, + new => sub { local $^W; return [@_] }, + null => sub { '' }, + nsort => \&vmethod_nsort, + pop => sub { pop @{ $_[0] } }, + push => sub { my $ref = shift; push @$ref, @_; return '' }, + random => sub { my $ref = shift; $ref->[ rand @$ref ] }, + reverse => sub { [ reverse @{ $_[0] } ] }, + shift => sub { shift @{ $_[0] } }, + size => sub { local $^W; scalar @{ $_[0] } }, + slice => sub { my ($ref, $a, $b) = @_; $a ||= 0; $b = $#$ref if ! defined $b; return [@{$ref}[$a .. $b]] }, + sort => \&vmethod_sort, + splice => \&vmethod_splice, + unique => sub { my %u; return [ grep { ! $u{$_}++ } @{ $_[0] } ] }, + unshift => sub { my $ref = shift; unshift @$ref, @_; return '' }, + }; + + $HASH_OPS = { + as => \&vmethod_as_hash, + defined => sub { return 1 if @_ == 1; defined $_[0]->{ defined($_[1]) ? $_[1] : '' } }, + delete => sub { my $h = shift; my @v = delete @{ $h }{map {defined($_) ? $_ : ''} @_}; @_ == 1 ? $v[0] : \@v }, + each => sub { [%{ $_[0] }] }, + exists => sub { exists $_[0]->{ defined($_[1]) ? $_[1] : '' } }, + fmt => \&vmethod_as_hash, + hash => sub { $_[0] }, + import => sub { my ($a, $b) = @_; @{$a}{keys %$b} = values %$b if ref($b) eq 'HASH'; '' }, + item => sub { my ($h, $k) = @_; $k = '' if ! defined $k; $k =~ $QR_PRIVATE ? undef : $h->{$k} }, + items => sub { [ %{ $_[0] } ] }, + keys => sub { [keys %{ $_[0] }] }, + list => \&vmethod_list_hash, + new => sub { local $^W; return (@_ == 1 && ref $_[-1] eq 'HASH') ? $_[-1] : {@_} }, + null => sub { '' }, + nsort => sub { my $ref = shift; [sort { $ref->{$a} <=> $ref->{$b}} keys %$ref] }, + pairs => sub { [map { {key => $_, value => $_[0]->{$_}} } sort keys %{ $_[0] } ] }, + size => sub { scalar keys %{ $_[0] } }, + sort => sub { my $ref = shift; [sort {lc $ref->{$a} cmp lc $ref->{$b}} keys %$ref] }, + values => sub { [values %{ $_[0] }] }, + }; + + $VOBJS = { + Text => $SCALAR_OPS, + List => $LIST_OPS, + Hash => $HASH_OPS, + }; + foreach (values %$VOBJS) { + $_->{'Text'} = $_->{'as'}; + $_->{'Hash'} = $_->{'hash'}; + $_->{'List'} = $_->{'list'}; + } + + $DIRECTIVES = { + #name parse_sub play_sub block postdir continue move_to_front + BLOCK => [\&parse_BLOCK, \&play_BLOCK, 1, 0, 0, 1], + BREAK => [sub {}, \&play_control], + CALL => [\&parse_CALL, \&play_CALL], + CASE => [\&parse_CASE, undef, 0, 0, {SWITCH => 1, CASE => 1}], + CATCH => [\&parse_CATCH, undef, 0, 0, {TRY => 1, CATCH => 1}], + CLEAR => [sub {}, \&play_CLEAR], + '#' => [sub {}, sub {}], + DEBUG => [\&parse_DEBUG, \&play_DEBUG], + DEFAULT => [\&parse_DEFAULT, \&play_DEFAULT], + DUMP => [\&parse_DUMP, \&play_DUMP], + ELSE => [sub {}, undef, 0, 0, {IF => 1, ELSIF => 1, UNLESS => 1}], + ELSIF => [\&parse_IF, undef, 0, 0, {IF => 1, ELSIF => 1, UNLESS => 1}], + END => [undef, sub {}], + FILTER => [\&parse_FILTER, \&play_FILTER, 1, 1], + '|' => [\&parse_FILTER, \&play_FILTER, 1, 1], + FINAL => [sub {}, undef, 0, 0, {TRY => 1, CATCH => 1}], + FOR => [\&parse_FOREACH, \&play_FOREACH, 1, 1], + FOREACH => [\&parse_FOREACH, \&play_FOREACH, 1, 1], + GET => [\&parse_GET, \&play_GET], + IF => [\&parse_IF, \&play_IF, 1, 1], + INCLUDE => [\&parse_INCLUDE, \&play_INCLUDE], + INSERT => [\&parse_INSERT, \&play_INSERT], + LAST => [sub {}, \&play_control], + MACRO => [\&parse_MACRO, \&play_MACRO], + META => [undef, sub {}], + METADEF => [undef, \&play_METADEF], + NEXT => [sub {}, \&play_control], + PERL => [\&parse_PERL, \&play_PERL, 1], + PROCESS => [\&parse_PROCESS, \&play_PROCESS], + RAWPERL => [\&parse_PERL, \&play_RAWPERL, 1], + RETURN => [sub {}, \&play_control], + SET => [\&parse_SET, \&play_SET], + STOP => [sub {}, \&play_control], + SWITCH => [\&parse_SWITCH, \&play_SWITCH, 1], + TAGS => [undef, sub {}], + THROW => [\&parse_THROW, \&play_THROW], + TRY => [sub {}, \&play_TRY, 1], + UNLESS => [\&parse_UNLESS, \&play_UNLESS, 1, 1], + USE => [\&parse_USE, \&play_USE], + WHILE => [\&parse_IF, \&play_WHILE, 1, 1], + WRAPPER => [\&parse_WRAPPER, \&play_WRAPPER, 1, 1], + #name #parse_sub #play_sub #block #postdir #continue #move_to_front + }; + $QR_DIRECTIVE = qr{ ^ (\w+|\|) (?= $|[\s;\#]) }x; -use CGI::Ex; -use CGI::Ex::Fill; + ### setup the operator parsing + $OPERATORS = [ + # type precedence symbols action (undef means play_operator will handle) + ['postfix', 99, ['++'], undef ], + ['postfix', 99, ['--'], undef ], + ['prefix', 98, ['++'], undef ], + ['prefix', 98, ['--'], undef ], + ['right', 96, ['**', 'pow'], sub { $_[0] ** $_[1] } ], + ['prefix', 93, ['!'], sub { ! $_[0] } ], + ['prefix', 93, ['-'], sub { @_ == 1 ? 0 - $_[0] : $_[0] - $_[1] } ], + ['left', 90, ['*'], sub { $_[0] * $_[1] } ], + ['left', 90, ['/'], sub { $_[0] / $_[1] } ], + ['left', 90, ['div', 'DIV'], sub { int($_[0] / $_[1]) } ], + ['left', 90, ['%', 'mod', 'MOD'], sub { $_[0] % $_[1] } ], + ['left', 85, ['+'], sub { $_[0] + $_[1] } ], + ['left', 85, ['-'], sub { @_ == 1 ? 0 - $_[0] : $_[0] - $_[1] } ], + ['left', 85, ['~', '_'], sub { join "", @_ } ], + ['none', 80, ['<'], sub { $_[0] < $_[1] } ], + ['none', 80, ['>'], sub { $_[0] > $_[1] } ], + ['none', 80, ['<='], sub { $_[0] <= $_[1] } ], + ['none', 80, ['>='], sub { $_[0] >= $_[1] } ], + ['none', 80, ['lt'], sub { $_[0] lt $_[1] } ], + ['none', 80, ['gt'], sub { $_[0] gt $_[1] } ], + ['none', 80, ['le'], sub { $_[0] le $_[1] } ], + ['none', 80, ['ge'], sub { $_[0] ge $_[1] } ], + ['none', 75, ['==', 'eq'], sub { $_[0] eq $_[1] } ], + ['none', 75, ['!=', 'ne'], sub { $_[0] ne $_[1] } ], + ['left', 70, ['&&'], undef ], + ['right', 65, ['||'], undef ], + ['none', 60, ['..'], sub { $_[0] .. $_[1] } ], + ['ternary', 55, ['?', ':'], undef ], + ['assign', 53, ['+='], sub { $_[0] + $_[1] } ], + ['assign', 53, ['-='], sub { $_[0] - $_[1] } ], + ['assign', 53, ['*='], sub { $_[0] * $_[1] } ], + ['assign', 53, ['/='], sub { $_[0] / $_[1] } ], + ['assign', 53, ['%='], sub { $_[0] % $_[1] } ], + ['assign', 53, ['**='], sub { $_[0]** $_[1] } ], + ['assign', 53, ['~=', '_='], sub { $_[0] . $_[1] } ], + ['assign', 52, ['='], undef ], + ['prefix', 50, ['not', 'NOT'], sub { ! $_[0] } ], + ['left', 45, ['and', 'AND'], undef ], + ['right', 40, ['or', 'OR'], undef ], + ['', 0, ['hash'], sub { return {@_}; } ], + ['', 0, ['array'], sub { return [@_] } ], + ]; + $OP = {map {my $ref = $_; map {$_ => $ref} @{$ref->[2]}} grep {$_->[0] ne 'prefix' } @$OPERATORS}; # all non-prefix + $OP_PREFIX = {map {my $ref = $_; map {$_ => $ref} @{$ref->[2]}} grep {$_->[0] eq 'prefix' } @$OPERATORS}; + $OP_DISPATCH = {map {my $ref = $_; map {$_ => $ref->[3]} @{$ref->[2]}} grep {$_->[3] } @$OPERATORS}; + $OP_ASSIGN = {map {my $ref = $_; map {$_ => 1} @{$ref->[2]}} grep {$_->[0] eq 'assign' } @$OPERATORS}; + $OP_POSTFIX = {map {my $ref = $_; map {$_ => 1} @{$ref->[2]}} grep {$_->[0] eq 'postfix'} @$OPERATORS}; # bool is postfix + $OP_TERNARY = {map {my $ref = $_; map {$_ => 1} @{$ref->[2]}} grep {$_->[0] eq 'ternary'} @$OPERATORS}; # bool is ternary + sub _op_qr { # no mixed \w\W operators + my %used; + my $chrs = join '|', reverse sort map {quotemeta $_} grep {++$used{$_} < 2} grep {/^\W{2,}$/} @_; + my $chr = join '', sort map {quotemeta $_} grep {++$used{$_} < 2} grep {/^\W$/} @_; + my $word = join '|', reverse sort grep {++$used{$_} < 2} grep {/^\w+$/} @_; + $chr = "[$chr]" if $chr; + $word = "\\b(?:$word)\\b" if $word; + return join('|', grep {length} $chrs, $chr, $word) || die "Missing operator regex"; + } + sub _build_op_qr { _op_qr(map {@{ $_->[2] }} grep {$_->[0] ne 'prefix'} @$OPERATORS) } + sub _build_op_qr_prefix { _op_qr(map {@{ $_->[2] }} grep {$_->[0] eq 'prefix'} @$OPERATORS) } + sub _build_op_qr_assign { _op_qr(map {@{ $_->[2] }} grep {$_->[0] eq 'assign'} @$OPERATORS) } + $QR_OP = _build_op_qr(); + $QR_OP_PREFIX = _build_op_qr_prefix(); + $QR_OP_ASSIGN = _build_op_qr_assign(); -$CONTENT_SUBDIR ||= 'content'; + $QR_COMMENTS = '(?-s: \# .* \s*)*'; + $QR_FILENAME = '([a-zA-Z]]:/|/)? [\w\-\.]+ (?:/[\w\-\.]+)*'; + $QR_NUM = '(?:\d*\.\d+ | \d+) (?: [eE][+-]\d+ )?'; + $QR_AQ_NOTDOT = "(?! \\s* $QR_COMMENTS \\.)"; + $QR_AQ_SPACE = '(?: \\s+ | \$ | (?=[;+]) )'; # the + comes into play on filenames + $QR_PRIVATE = qr/^[_.]/; + + $WHILE_MAX = 1000; + $EXTRA_COMPILE_EXT = '.sto'; + + eval {require Scalar::Util}; +}; ###----------------------------------------------------------------### sub new { my $class = shift; - my $args = ref($_[0]) ? shift : {@_}; + my $args = ref($_[0]) ? { %{ shift() } } : {@_}; + my $self = bless $args, $class; - $args->{INCLUDE_PATH} ||= \@INCLUDE_PATH; + ### "enable" debugging - we only support DEBUG_DIRS and DEBUG_UNDEF + if ($self->{'DEBUG'}) { + $self->{'_debug_dirs'} = 1 if $self->{'DEBUG'} =~ /^\d+$/ ? $self->{'DEBUG'} & 8 : $self->{'DEBUG'} =~ /dirs|all/; + $self->{'_debug_undef'} = 1 if $self->{'DEBUG'} =~ /^\d+$/ ? $self->{'DEBUG'} & 2 : $self->{'DEBUG'} =~ /undef|all/; + } - return $class->SUPER::new($args); + return $self; } -sub process { - my $self = ref($_[0]) ? shift : shift->new; - my $in = shift; +###----------------------------------------------------------------### - ### force the content to have a .html prefix - if (! ref $in) { - $in .= '.html' if $in !~ /\.\w+$/; - } +sub _process { + my $self = shift; + my $file = shift; + local $self->{'_vars'} = shift || {}; + my $out_ref = shift || $self->throw('undef', "Missing output ref"); + local $self->{'_top_level'} = delete $self->{'_start_top_level'}; + my $i = length $$out_ref; - ### prepend "content" dir as needed - if (! ref($in) # not a scalar ref or a file glob - && $in =~ m|^\w+(\.\w+)?(/\w+(\.\w+)?)*$| # not an absolute filename - && index($in, $CONTENT_SUBDIR) == -1) { - $in = $CONTENT_SUBDIR .'/'. $in; - } + ### parse and execute + my $doc; + eval { + ### load the document + $doc = $self->load_parsed_tree($file) || $self->throw('undef', "Zero length content");; + + ### prevent recursion + $self->throw('file', "recursion into '$doc->{name}'") + if ! $self->{'RECURSION'} && $self->{'_in'}->{$doc->{'name'}} && $doc->{'name'} ne 'input text'; + local $self->{'_in'}->{$doc->{'name'}} = 1; - return $self->SUPER::process($in, @_); + ### execute the document + if (! @{ $doc->{'_tree'} }) { # no tags found - just return the content + $$out_ref = ${ $doc->{'_content'} }; + } else { + local $self->{'_vars'}->{'component'} = $doc; + $self->{'_vars'}->{'template'} = $doc if $self->{'_top_level'}; + $self->execute_tree($doc->{'_tree'}, $out_ref); + delete $self->{'_vars'}->{'template'} if $self->{'_top_level'}; + } + }; + + ### trim whitespace from the beginning and the end of a block or template + if ($self->{'TRIM'}) { + substr($$out_ref, $i, length($$out_ref) - $i) =~ s{ \s+ $ }{}x; # tail first + substr($$out_ref, $i, length($$out_ref) - $i) =~ s{ ^ \s+ }{}x; + } + + ### handle exceptions + if (my $err = $@) { + $err = $self->exception('undef', $err) if ref($err) !~ /Template::Exception$/; + $err->doc($doc) if $doc && $err->can('doc') && ! $err->doc; + die $err if ! $self->{'_top_level'} || $err->type !~ /stop|return/; + } + + return 1; } ###----------------------------------------------------------------### -sub out { - my $self = ref($_[0]) ? shift : shift->new; -# dex $self; - my $in = shift; - my $form = shift; - my $fill = shift; - my $out = ''; +sub load_parsed_tree { + my $self = shift; + my $file = shift; + return if ! defined $file; + + my $doc = {name => $file}; + + ### looks like a string reference + if (ref $file) { + $doc->{'_content'} = $file; + $doc->{'name'} = 'input text'; + $doc->{'is_str_ref'} = 1; + + ### looks like a previously cached-in-memory document + } elsif ($self->{'_documents'}->{$file} + && ( ($self->{'_documents'}->{$file}->{'_cache_time'} == time) # don't stat more than once a second + || ($self->{'_documents'}->{$file}->{'modtime'} + == (stat $self->{'_documents'}->{$file}->{'_filename'})[9]))) { + $doc = $self->{'_documents'}->{$file}; + $doc->{'_cache_time'} = time; + return $doc; + + ### looks like a block name of some sort + } elsif ($self->{'BLOCKS'}->{$file}) { + my $block = $self->{'BLOCKS'}->{$file}; + + ### allow for predefined blocks that are a code or a string + if (UNIVERSAL::isa($block, 'CODE')) { + $block = $block->(); + } + if (! UNIVERSAL::isa($block, 'HASH')) { + $self->throw('block', "Unsupported BLOCK type \"$block\"") if ref $block; + my $copy = $block; + $block = eval { $self->load_parsed_tree(\$copy) } + || $self->throw('block', 'Parse error on predefined block'); + } + $doc->{'_tree'} = $block->{'_tree'} || $self->throw('block', "Invalid block definition (missing tree)"); + return $doc; + + + ### go and look on the file system + } else { + $doc->{'_filename'} = eval { $self->include_filename($file) }; + if (my $err = $@) { + ### allow for blocks in other files + if ($self->{'EXPOSE_BLOCKS'} + && ! $self->{'_looking_in_block_file'}) { + local $self->{'_looking_in_block_file'} = 1; + my $block_name = ''; + while ($file =~ s|/([^/.]+)$||) { + $block_name = length($block_name) ? "$1/$block_name" : $1; + my $ref = eval { $self->load_parsed_tree($file) } || next; + my $_tree = $ref->{'_tree'}; + foreach my $node (@$_tree) { + next if ! ref $node; + next if $node->[0] eq 'METADEF'; + last if $node->[0] ne 'BLOCK'; + next if $block_name ne $node->[3]; + $doc->{'_content'} = $ref->{'_content'}; + $doc->{'_tree'} = $node->[4]; + $doc->{'modtime'} = $ref->{'modtime'}; + $file = $ref->{'name'}; + last; + } + } + die $err if ! $doc->{'_tree'}; + } elsif ($self->{'DEFAULT'}) { + $doc->{'_filename'} = eval { $self->include_filename($self->{'DEFAULT'}) } || die $err; + } else { + die $err; + } + } + + ### no tree yet - look for a file cache + if (! $doc->{'_tree'}) { + $doc->{'modtime'} = (stat $doc->{'_filename'})[9]; + if ($self->{'COMPILE_DIR'} || $self->{'COMPILE_EXT'}) { + if ($self->{'COMPILE_DIR'}) { + $doc->{'_compile_filename'} = $self->{'COMPILE_DIR'} .'/'. $file; + } else { + $doc->{'_compile_filename'} = $doc->{'_filename'}; + } + $doc->{'_compile_filename'} .= $self->{'COMPILE_EXT'} if defined($self->{'COMPILE_EXT'}); + $doc->{'_compile_filename'} .= $EXTRA_COMPILE_EXT if defined $EXTRA_COMPILE_EXT; + + if (-e $doc->{'_compile_filename'} && (stat _)[9] == $doc->{'modtime'}) { + require Storable; + $doc->{'_tree'} = Storable::retrieve($doc->{'_compile_filename'}); + $doc->{'compile_was_used'} = 1; + } else { + my $str = $self->slurp($doc->{'_filename'}); + $doc->{'_content'} = \$str; + } + } else { + my $str = $self->slurp($doc->{'_filename'}); + $doc->{'_content'} = \$str; + } + } + + } + + ### haven't found a parsed tree yet - parse the content into a tree + if (! $doc->{'_tree'}) { + if ($self->{'CONSTANTS'}) { + my $key = $self->{'CONSTANT_NAMESPACE'} || 'constants'; + $self->{'NAMESPACE'}->{$key} ||= $self->{'CONSTANTS'}; + } + + local $self->{'_vars'}->{'component'} = $doc; + $doc->{'_tree'} = $self->parse_tree($doc->{'_content'}); # errors die + } + + ### cache parsed_tree in memory unless asked not to do so + if (! $doc->{'is_str_ref'} && (! defined($self->{'CACHE_SIZE'}) || $self->{'CACHE_SIZE'})) { + $self->{'_documents'}->{$file} ||= $doc; + $doc->{'_cache_time'} = time; + + ### allow for config option to keep the cache size down + if ($self->{'CACHE_SIZE'}) { + my $all = $self->{'_documents'}; + if (scalar(keys %$all) > $self->{'CACHE_SIZE'}) { + my $n = 0; + foreach my $file (sort {$all->{$b}->{'_cache_time'} <=> $all->{$a}->{'_cache_time'}} keys %$all) { + delete($all->{$file}) if ++$n > $self->{'CACHE_SIZE'}; + } + } + } + } + + ### save a cache on the fileside as asked + if ($doc->{'_compile_filename'} && ! $doc->{'compile_was_used'}) { + my $dir = $doc->{'_compile_filename'}; + $dir =~ s|/[^/]+$||; + if (! -d $dir) { + require File::Path; + File::Path::mkpath($dir); + } + require Storable; + Storable::store($doc->{'_tree'}, $doc->{'_compile_filename'}); + utime $doc->{'modtime'}, $doc->{'modtime'}, $doc->{'_compile_filename'}; + } + + return $doc; +} + +sub parse_tree { + my $self = shift; + my $str_ref = shift; + if (! $str_ref || ! defined $$str_ref) { + $self->throw('parse.no_string', "No string or undefined during parse"); + } + + my $STYLE = $self->{'TAG_STYLE'} || 'default'; + my $START = $self->{'START_TAG'} || $TAGS->{$STYLE}->[0]; + my $END = $self->{'END_TAG'} || $TAGS->{$STYLE}->[1]; + my $len_s = length $START; + my $len_e = length $END; + + my @tree; # the parsed tree + my $pointer = \@tree; # pointer to current tree to handle nested blocks + my @state; # maintain block levels + local $self->{'_state'} = \@state; # allow for items to introspect (usually BLOCKS) + local $self->{'_in_perl'}; # no interpolation in perl + my @move_to_front; # items that need to be declared first (usually BLOCKS) + my @meta; # place to store any found meta information (to go into METADEF) + my $i = 0; # start index + my $j = 0; # end index + my $last = 0; # previous end index + my $post_chomp = 0; # previous post_chomp setting + my $continue; # multiple directives in the same tag + my $post_op; # found a post-operative DIRECTIVE + my $capture; # flag to start capture + my $func; + my $node; + my $tag; + while (1) { + ### continue looking for information in a semi-colon delimited tag + if ($continue) { + $i = $continue; + $node = [undef, $i, $j]; + + ### look through the string using index + } else { + $i = index($$str_ref, $START, $last); + last if $i == -1; # no start tag found - we are done + if ($last != $i) { # found a text portion - chomp it, interpolate it and store it + my $text = substr($$str_ref, $last, $i - $last); + my $_last = $last; + if ($post_chomp) { + if ($post_chomp == 1) { $_last += length($1) if $text =~ s{ ^ ([^\S\n]* \n) }{}x } + elsif ($post_chomp == 2) { $_last += length($1) + 1 if $text =~ s{ ^ (\s+) }{ }x } + elsif ($post_chomp == 3) { $_last += length($1) if $text =~ s{ ^ (\s+) }{}x } + } + if (length $text) { + push @$pointer, $text; + $self->interpolate_node($pointer, $_last) if $self->{'INTERPOLATE'}; + } + } + $j = index($$str_ref, $END, $i + $len_s); + $last = $j + $len_e; + if ($j == -1) { # missing closing tag + $last = length($$str_ref); + last; + } + $tag = substr($$str_ref, $i + $len_s, $j - ($i + $len_s)); + $node = [undef, $i + $len_s, $j]; + + ### take care of whitespace and comments flags + my $pre_chomp = $tag =~ s{ ^ ([+=~-]) }{}x ? $1 : $self->{'PRE_CHOMP'}; + $post_chomp = $tag =~ s{ ([+=~-]) $ }{}x ? $1 : $self->{'POST_CHOMP'}; + $pre_chomp =~ y/-=~+/1230/ if $pre_chomp; + $post_chomp =~ y/-=~+/1230/ if $post_chomp; + if ($pre_chomp && $pointer->[-1] && ! ref $pointer->[-1]) { + if ($pre_chomp == 1) { $pointer->[-1] =~ s{ (?:\n|^) [^\S\n]* \z }{}x } + elsif ($pre_chomp == 2) { $pointer->[-1] =~ s{ (\s+) \z }{ }x } + elsif ($pre_chomp == 3) { $pointer->[-1] =~ s{ (\s+) \z }{}x } + splice(@$pointer, -1, 1, ()) if ! length $pointer->[-1]; # remove the node if it is zero length + } + if ($tag =~ /^\#/) { # leading # means to comment the entire section + $node->[0] = '#'; + push @$pointer, $node; + next; + } + $tag =~ s{ ^ \s+ $QR_COMMENTS }{}ox; + } + + if (! length $tag) { + undef $continue; + undef $post_op; + next; + } + + ### look for DIRECTIVES + if ($tag =~ $QR_DIRECTIVE # find a word + && $DIRECTIVES->{$1} ) { # is it a directive + $node->[0] = $func = $1; + $tag =~ s{ ^ (\w+ | \|) \s* $QR_COMMENTS }{}ox; + + ### store out this current node level + if ($post_op) { # on a post operator - replace the original node with the new one - store the old in the new + my @post_op = @$post_op; + @$post_op = @$node; + $node = $post_op; + $node->[4] = [\@post_op]; + } elsif ($capture) { + # do nothing - it will be handled further down + } else{ + push @$pointer, $node; + } + + ### anything that behaves as a block ending + if ($func eq 'END' || $DIRECTIVES->{$func}->[4]) { # [4] means it is a continuation block (ELSE, CATCH, etc) + if (! @state) { + $self->throw('parse', "Found an $func tag while not in a block", $node); + } + my $parent_node = pop @state; + + if ($func ne 'END') { + pop @$pointer; # we will store the node in the parent instead + $parent_node->[5] = $node; + my $parent_type = $parent_node->[0]; + if (! $DIRECTIVES->{$func}->[4]->{$parent_type}) { + $self->throw('parse', "Found unmatched nested block", $node, 0); + } + } + + ### restore the pointer up one level (because we hit the end of a block) + $pointer = (! @state) ? \@tree : $state[-1]->[4]; + + ### normal end block + if ($func eq 'END') { + if ($DIRECTIVES->{$parent_node->[0]}->[5]) { # move things like BLOCKS to front + push @move_to_front, $parent_node; + if ($pointer->[-1] && ! $pointer->[-1]->[6]) { # capturing doesn't remove the var + splice(@$pointer, -1, 1, ()); + } + } elsif ($parent_node->[0] =~ /PERL$/) { + delete $self->{'_in_perl'}; + } + + ### continuation block - such as an elsif + } else { + $node->[3] = eval { $DIRECTIVES->{$func}->[0]->($self, \$tag, $node) }; + if (my $err = $@) { + $err->node($node) if UNIVERSAL::can($err, 'node') && ! $err->node; + die $err; + } + push @state, $node; + $pointer = $node->[4] ||= []; + } + + } elsif ($func eq 'TAGS') { + if ($tag =~ / ^ (\w+) /x && $TAGS->{$1}) { + $tag =~ s{ ^ (\w+) \s* $QR_COMMENTS }{}ox; + ($START, $END) = @{ $TAGS->{$1} }; + } elsif ($tag =~ s{ ^ (\S+) \s+ (\S+) \s* $QR_COMMENTS }{}ox) { + ($START, $END) = ($1, $2); + } + $len_s = length $START; + $len_e = length $END; + + } elsif ($func eq 'META') { + my $args = $self->parse_args(\$tag); + my $hash; + if (($hash = $self->play_expr($args->[-1])) + && UNIVERSAL::isa($hash, 'HASH')) { + unshift @meta, %$hash; # first defined win + } + + ### all other "normal" tags + } else { + $node->[3] = eval { $DIRECTIVES->{$func}->[0]->($self, \$tag, $node) }; + if (my $err = $@) { + $err->node($node) if UNIVERSAL::can($err, 'node') && ! $err->node; + die $err; + } + if ($DIRECTIVES->{$func}->[2] && ! $post_op) { # this looks like a block directive + push @state, $node; + $pointer = $node->[4] ||= []; + } + } + + ### allow for bare variable getting and setting + } elsif (defined(my $var = $self->parse_expr(\$tag))) { + push @$pointer, $node; + if ($tag =~ s{ ^ ($QR_OP_ASSIGN) >? \s* $QR_COMMENTS }{}ox) { + $node->[0] = 'SET'; + $node->[3] = eval { $DIRECTIVES->{'SET'}->[0]->($self, \$tag, $node, $1, $var) }; + if (my $err = $@) { + $err->node($node) if UNIVERSAL::can($err, 'node') && ! $err->node; + die $err; + } + } else { + $node->[0] = 'GET'; + $node->[3] = $var; + } + + } else { # error + my $all = substr($$str_ref, $i + $len_s, $j - ($i + $len_s)); + $all =~ s/^\s+//; + $all =~ s/\s+$//; + $self->throw('parse', "Not sure how to handle tag \"$all\"", $node); + } + + ### we now have the directive to capture for an item like "SET foo = BLOCK" - store it + if ($capture) { + my $parent_node = $capture; + push @{ $parent_node->[4] }, $node; + undef $capture; + } + + ### we are flagged to start capturing the output of the next directive - set it up + if ($node->[6]) { + $continue = $j - length $tag; + $node->[2] = $continue; + $post_op = undef; + $capture = $node; - ### run the template - my $status = $self->process($in, $form, \$out) || die $Template::ERROR; + ### semi-colon = end of statement - we will need to continue parsing this tag + } elsif ($tag =~ s{ ^ ; \s* $QR_COMMENTS }{}ox) { + $continue = $j - length $tag; + $node->[2] = $continue; + $post_op = undef; - ### fill in any forms - &CGI::Ex::Fill::form_fill(\$out, $fill) if $fill && ! $self->{no_fill}; + ### looking at a post operator ([% u FOREACH u IN [1..3] %]) + } elsif ($tag =~ $QR_DIRECTIVE # find a word + && $DIRECTIVES->{$1} # is it a directive + && $DIRECTIVES->{$1}->[3]) { # it is a post operative directive + $continue = $j - length $tag; + $node->[2] = $continue; + $post_op = $node; - return $out; + ### unlink TT2 - look for another directive + } elsif (length $tag) { + #$self->throw('parse', "Found trailing info \"$tag\"", $node); + $continue = $j - length $tag; + $node->[2] = $continue; + $post_op = undef; + + } else { + $continue = undef; + $post_op = undef; + } + } + + if (@move_to_front) { + unshift @tree, @move_to_front; + } + if (@meta) { + unshift @tree, ['METADEF', 0, 0, {@meta}]; + } + + if ($#state > -1) { + $self->throw('parse.missing.end', "Missing END", $state[-1], 0); + } + + ### pull off the last text portion - if any + if ($last != length($$str_ref)) { + my $text = substr($$str_ref, $last, length($$str_ref) - $last); + my $_last = $last; + if ($post_chomp) { + if ($post_chomp == 1) { $_last += length($1) if $text =~ s{ ^ ([^\S\n]* \n) }{}x } + elsif ($post_chomp == 2) { $_last += length($1) + 1 if $text =~ s{ ^ (\s+) }{ }x } + elsif ($post_chomp == 3) { $_last += length($1) if $text =~ s{ ^ (\s+) }{}x } + } + if (length $text) { + push @$pointer, $text; + $self->interpolate_node($pointer, $_last) if $self->{'INTERPOLATE'}; + } + } + + return \@tree; } -sub print { - my $self = ref($_[0]) ? shift : shift->new; - my $in = shift; - my $form = shift; - my $fill = shift || $form; +sub execute_tree { + my ($self, $tree, $out_ref) = @_; + + # node contains (0: DIRECTIVE, + # 1: start_index, + # 2: end_index, + # 3: parsed tag details, + # 4: sub tree for block types + # 5: continuation sub trees for sub continuation block types (elsif, else, etc) + # 6: flag to capture next directive + for my $node (@$tree) { + ### text nodes are just the bare text + if (! ref $node) { + warn "NODE: TEXT\n" if trace; + $$out_ref .= $node if defined $node; + next; + } - &CGI::Ex::content_type(); - print $self->out($in, $form, $fill); + warn "NODE: $node->[0] (char $node->[1])\n" if trace; + $$out_ref .= $self->debug_node($node) if $self->{'_debug_dirs'} && ! $self->{'_debug_off'}; + + my $val = $DIRECTIVES->{$node->[0]}->[1]->($self, $node->[3], $node, $out_ref); + $$out_ref .= $val if defined $val; + } } ###----------------------------------------------------------------### -1; +sub parse_expr { + my $self = shift; + my $str_ref = shift; + my $ARGS = shift || {}; + + ### allow for custom auto_quoting (such as hash constructors) + if ($ARGS->{'auto_quote'}) { + if ($$str_ref =~ $ARGS->{'auto_quote'}) { + my $str = $1; + substr($$str_ref, 0, length($str), ''); + $$str_ref =~ s{ ^ \s* $QR_COMMENTS }{}ox; + return $str; + ### allow for auto-quoted $foo or ${foo.bar} type constructs + } elsif ($$str_ref =~ s{ ^ \$ (\w+ (?:\.\w+)*) \b \s* $QR_COMMENTS }{}ox + || $$str_ref =~ s{ ^ \$\{ \s* ([^\}]+) \} \s* $QR_COMMENTS }{}ox) { + my $name = $1; + return $self->parse_expr(\$name); + } + } + + my $copy = $$str_ref; # copy while parsing to allow for errors + + ### test for leading prefix operators + my $has_prefix; + while ($copy =~ s{ ^ ($QR_OP_PREFIX) \s* $QR_COMMENTS }{}ox) { + return if $ARGS->{'auto_quote'}; # auto_quoted thing was too complicated + push @{ $has_prefix }, $1; + } + + my @var; + my $is_literal; + my $is_namespace; + + ### allow hex + if ($copy =~ s{ ^ 0x ( [a-fA-F0-9]+ ) \s* $QR_COMMENTS }{}ox) { + my $number = eval { hex $1 } || 0; + push @var, \ $number; + $is_literal = 1; + + ### allow for numbers + } elsif ($copy =~ s{ ^ ( $QR_NUM ) \s* $QR_COMMENTS }{}ox) { + my $number = $1; + push @var, \ $number; + $is_literal = 1; + + ### allow for quoted array constructor + } elsif ($copy =~ s{ ^ qw (\W) \s* }{}x) { + my $quote = $1; + $quote =~ y|([{<|)]}>|; + $copy =~ s{ ^ (.*) \Q$quote\E \s* $QR_COMMENTS }{}sx + || $self->throw('parse.missing.array_close', "Missing close \"$quote\"", undef, length($$str_ref) - length($copy)); + my $str = $1; + $str =~ s{ ^ \s+ | \s+ $ }{}x; + my $arrayref = ['array', split /\s+/, $str]; + push @var, \ $arrayref; + + ### looks like a normal variable start + } elsif ($copy =~ s{ ^ (\w+) \s* $QR_COMMENTS }{}ox) { + push @var, $1; + $is_namespace = 1 if $self->{'NAMESPACE'} && $self->{'NAMESPACE'}->{$1}; + + ### allow for literal strings + } elsif ($copy =~ s{ ^ ([\"\']) (|.*?[^\\]) \1 \s* $QR_COMMENTS }{}sox) { + if ($1 eq "'") { # no interpolation on single quoted strings + my $str = $2; + $str =~ s{ \\\' }{\'}xg; + push @var, \ $str; + $is_literal = 1; + } else { + my $str = $2; + $str =~ s/\\n/\n/g; + $str =~ s/\\t/\t/g; + $str =~ s/\\r/\r/g; + $str =~ s/\\([\"\$])/$1/g; + my @pieces = $ARGS->{'auto_quote'} + ? split(m{ (\$\w+ | \$\{ [^\}]+ \}) }x, $str) # autoquoted items get a single $\w+ - no nesting + : split(m{ (\$\w+ (?:\.\w+)* | \$\{ [^\}]+ \}) }x, $str); + my $n = 0; + foreach my $piece (@pieces) { + next if ! ($n++ % 2); + next if $piece !~ m{ ^ \$ (\w+ (?:\.\w+)*) $ }x + && $piece !~ m{ ^ \$\{ \s* ([^\}]+) \} $ }x; + my $name = $1; + $piece = $self->parse_expr(\$name); + } + @pieces = grep {defined && length} @pieces; + if (@pieces == 1 && ! ref $pieces[0]) { + push @var, \ $pieces[0]; + $is_literal = 1; + } elsif (! @pieces) { + push @var, \ ''; + $is_literal = 1; + } else { + push @var, \ ['~', @pieces]; + } + } + if ($ARGS->{'auto_quote'}){ + $$str_ref = $copy; + return ${ $var[0] } if $is_literal; + push @var, 0; + return \@var; + } + + ### allow for leading $foo or ${foo.bar} type constructs + } elsif ($copy =~ s{ ^ \$ (\w+) \b \s* $QR_COMMENTS }{}ox + || $copy =~ s{ ^ \$\{ \s* ([^\}]+) \} \s* $QR_COMMENTS }{}ox) { + my $name = $1; + push @var, $self->parse_expr(\$name); + + ### looks like an array constructor + } elsif ($copy =~ s{ ^ \[ \s* $QR_COMMENTS }{}ox) { + local $self->{'_operator_precedence'} = 0; # reset presedence + my $arrayref = ['array']; + while (defined(my $var = $self->parse_expr(\$copy))) { + push @$arrayref, $var; + $copy =~ s{ ^ , \s* $QR_COMMENTS }{}ox; + } + $copy =~ s{ ^ \] \s* $QR_COMMENTS }{}ox + || $self->throw('parse.missing.square_bracket', "Missing close \]", undef, length($$str_ref) - length($copy)); + push @var, \ $arrayref; + + ### looks like a hash constructor + } elsif ($copy =~ s{ ^ \{ \s* $QR_COMMENTS }{}ox) { + local $self->{'_operator_precedence'} = 0; # reset precedence + my $hashref = ['hash']; + while (defined(my $key = $self->parse_expr(\$copy, {auto_quote => qr{ ^ (\w+) $QR_AQ_NOTDOT }xo}))) { + $copy =~ s{ ^ = >? \s* $QR_COMMENTS }{}ox; + my $val = $self->parse_expr(\$copy); + push @$hashref, $key, $val; + $copy =~ s{ ^ , \s* $QR_COMMENTS }{}ox; + } + $copy =~ s{ ^ \} \s* $QR_COMMENTS }{}ox + || $self->throw('parse.missing.curly_bracket', "Missing close \} ($copy)", undef, length($$str_ref) - length($copy)); + push @var, \ $hashref; + + ### looks like a paren grouper + } elsif ($copy =~ s{ ^ \( \s* $QR_COMMENTS }{}ox) { + local $self->{'_operator_precedence'} = 0; # reset precedence + my $var = $self->parse_expr(\$copy, {allow_parened_ops => 1}); + $copy =~ s{ ^ \) \s* $QR_COMMENTS }{}ox + || $self->throw('parse.missing.paren', "Missing close \)", undef, length($$str_ref) - length($copy)); + @var = @$var; + pop(@var); # pull off the trailing args of the paren group + + ### nothing to find - return failure + } else { + return; + } + + return if $ARGS->{'auto_quote'}; # auto_quoted thing was too complicated + + ### looks for args for the initial + if ($copy =~ s{ ^ \( \s* $QR_COMMENTS }{}ox) { + local $self->{'_operator_precedence'} = 0; # reset precedence + my $args = $self->parse_args(\$copy); + $copy =~ s{ ^ \) \s* $QR_COMMENTS }{}ox + || $self->throw('parse.missing.paren', "Missing close \)", undef, length($$str_ref) - length($copy)); + push @var, $args; + } else { + push @var, 0; + } + + ### allow for nested items + while ($copy =~ s{ ^ ( \.(?!\.) | \|(?!\|) ) \s* $QR_COMMENTS }{}ox) { + push(@var, $1) if ! $ARGS->{'no_dots'}; + + ### allow for interpolated variables in the middle - one.$foo.two or one.${foo.bar}.two + if ($copy =~ s{ ^ \$(\w+) \s* $QR_COMMENTS }{}ox + || $copy =~ s{ ^ \$\{ \s* ([^\}]+)\} \s* $QR_COMMENTS }{}ox) { + my $name = $1; + my $var = $self->parse_expr(\$name); + push @var, $var; + + ### allow for names + } elsif ($copy =~ s{ ^ (-? \w+) \s* $QR_COMMENTS }{}ox) { + push @var, $1; + + } else { + $self->throw('parse', "Not sure how to continue parsing on \"$copy\" ($$str_ref)"); + } + + ### looks for args for the nested item + if ($copy =~ s{ ^ \( \s* $QR_COMMENTS }{}ox) { + local $self->{'_operator_precedence'} = 0; # reset precedence + my $args = $self->parse_args(\$copy); + $copy =~ s{ ^ \) \s* $QR_COMMENTS }{}ox + || $self->throw('parse.missing.paren', "Missing close \)", undef, length($$str_ref) - length($copy)); + push @var, $args; + } else { + push @var, 0; + } + + } + + ### flatten literals and constants as much as possible + my $var = ($is_literal && $#var == 1) ? ${ $var[0] } + : $is_namespace ? $self->play_expr(\@var, {is_namespace_during_compile => 1}) + : \@var; + + ### allow for all "operators" + if (! $self->{'_operator_precedence'}) { + my $tree; + my $found; + while ($copy =~ s{ ^ ($QR_OP) (\s* $QR_COMMENTS) }{}ox) { ## look for operators - then move along + if (! $ARGS->{'allow_parened_ops'} && $OP_ASSIGN->{$1}) { + $copy = $1 . $2 . $copy; + last; + } + + local $self->{'_operator_precedence'} = 1; + my $op = $1; + + ### allow for postfix - doesn't check precedence - someday we might change - but not today (only affects post ++ and --) + if ($OP_POSTFIX->{$op}) { + $var = [\ [$op, $var, 1], 0]; # cheat - give a "second value" to postfix ops + next; + + ### allow for prefix operator precedence + } elsif ($has_prefix && $OP->{$op}->[1] < $OP_PREFIX->{$has_prefix->[-1]}->[1]) { + if ($tree) { + if ($#$tree == 1) { # only one operator - keep simple things fast + $var = [\ [$tree->[0], $var, $tree->[1]], 0]; + } else { + unshift @$tree, $var; + $var = $self->apply_precedence($tree, $found); + } + undef $tree; + undef $found; + } + $var = [ \ [ $has_prefix->[-1], $var ], 0 ]; + if (! @$has_prefix) { undef $has_prefix } else { pop @$has_prefix } + } + + ### add the operator to the tree + my $var2 = $self->parse_expr(\$copy); + push (@{ $tree ||= [] }, $op, $var2); + $found->{$OP->{$op}->[1]}->{$op} = 1; # found->{precedence}->{op} + } + + ### if we found operators - tree the nodes by operator precedence + if ($tree) { + if (@$tree == 2) { # only one operator - keep simple things fast + $var = [\ [$tree->[0], $var, $tree->[1]], 0]; + } else { + unshift @$tree, $var; + $var = $self->apply_precedence($tree, $found); + } + } + } + + ### allow for prefix on non-chained variables + if ($has_prefix) { + $var = [ \ [ $_, $var ], 0 ] for reverse @$has_prefix; + } + + $$str_ref = $copy; # commit the changes + return $var; +} + +### this is used to put the parsed variables into the correct operations tree +sub apply_precedence { + my ($self, $tree, $found) = @_; + + my @var; + my $trees; + ### look at the operators we found in the order we found them + for my $prec (sort keys %$found) { + my $ops = $found->{$prec}; + local $found->{$prec}; + delete $found->{$prec}; + + ### split the array on the current operators for this level + my @ops; + my @exprs; + for (my $i = 1; $i <= $#$tree; $i += 2) { + next if ! $ops->{ $tree->[$i] }; + push @ops, $tree->[$i]; + push @exprs, [splice @$tree, 0, $i, ()]; + shift @$tree; + $i = -1; + } + next if ! @exprs; # this iteration didn't have the current operator + push @exprs, $tree if scalar @$tree; # add on any remaining items + + ### simplify sub expressions + for my $node (@exprs) { + if (@$node == 1) { + $node = $node->[0]; # single item - its not a tree + } elsif (@$node == 3) { + $node = [ \ [ $node->[1], $node->[0], $node->[2] ], 0 ]; # single operator - put it straight on + } else { + $node = $self->apply_precedence($node, $found); # more complicated - recurse + } + } + + ### assemble this current level + + ### some rules: + # 1) items at the same precedence level must all be either right or left or ternary associative + # 2) ternary items cannot share precedence with anybody else. + # 3) there really shouldn't be another operator at the same level as a postfix + my $type = $OP->{$ops[0]}->[0]; + + if ($type eq 'ternary') { + my $op = $OP->{$ops[0]}->[2]->[0]; # use the first op as what we are using + + ### return simple ternary + if (@exprs == 3) { + $self->throw('parse', "Ternary operator mismatch") if $ops[0] ne $op; + $self->throw('parse', "Ternary operator mismatch") if ! $ops[1] || $ops[1] eq $op; + return [ \ [ $op, @exprs ], 0 ]; + } + + + ### reorder complex ternary - rare case + while ($#ops >= 1) { + ### if we look starting from the back - the first lead ternary op will always be next to its matching op + for (my $i = $#ops; $i >= 0; $i --) { + next if $OP->{$ops[$i]}->[2]->[1] eq $ops[$i]; + my ($op, $op2) = splice @ops, $i, 2, (); # remove the pair of operators + my $node = [ \ [$op, @exprs[$i .. $i + 2] ], 0 ]; + splice @exprs, $i, 3, $node; + } + } + return $exprs[0]; # at this point the ternary has been reduced to a single operator + + } elsif ($type eq 'right' || $type eq 'assign') { + my $val = $exprs[-1]; + $val = [ \ [ $ops[$_ - 1], $exprs[$_], $val ], 0 ] for reverse (0 .. $#exprs - 1); + return $val; + + } else { + my $val = $exprs[0]; + $val = [ \ [ $ops[$_ - 1], $val, $exprs[$_] ], 0 ] for (1 .. $#exprs); + return $val; + + } + } + + $self->throw('parse', "Couldn't apply precedence"); +} + +### look for arguments - both positional and named +sub parse_args { + my $self = shift; + my $str_ref = shift; + my $ARGS = shift || {}; + my $copy = $$str_ref; + + my @args; + my @named; + while (length $$str_ref) { + my $copy = $$str_ref; + if (defined(my $name = $self->parse_expr(\$copy, {auto_quote => qr{ ^ (\w+) $QR_AQ_NOTDOT }xo})) + && $copy =~ s{ ^ = >? \s* $QR_COMMENTS }{}ox) { + $self->throw('parse', 'Named arguments not allowed') if $ARGS->{'positional_only'}; + my $val = $self->parse_expr(\$copy); + $copy =~ s{ ^ , \s* $QR_COMMENTS }{}ox; + push @named, $name, $val; + $$str_ref = $copy; + } elsif (defined(my $arg = $self->parse_expr($str_ref))) { + push @args, $arg; + $$str_ref =~ s{ ^ , \s* $QR_COMMENTS }{}ox; + } else { + last; + } + } + + ### allow for named arguments to be added also + push @args, [\ ['hash', @named], 0] if scalar @named; + + return \@args; +} + +### allow for looking for $foo or ${foo.bar} in TEXT "nodes" of the parse tree. +sub interpolate_node { + my ($self, $tree, $offset) = @_; + return if $self->{'_in_perl'}; + + ### split on variables while keeping the variables + my @pieces = split m{ (?: ^ | (?[-1]; + if ($#pieces <= 0) { + $tree->[-1] =~ s{ \\ ([\"\$]) }{$1}xg; + return; + } + + my @sub_tree; + my $n = 0; + foreach my $piece (@pieces) { + $offset += length $piece; # we track the offset to make sure DEBUG has the right location + if (! ($n++ % 2)) { # odds will always be text chunks + next if ! length $piece; + $piece =~ s{ \\ ([\"\$]) }{$1}xg; + push @sub_tree, $piece; + } elsif ($piece =~ m{ ^ \$ (\w+ (?:\.\w+)*) $ }x + || $piece =~ m{ ^ \$\{ \s* ([^\}]+) \} $ }x) { + my $name = $1; + push @sub_tree, ['GET', $offset - length($piece), $offset, $self->parse_expr(\$name)]; + } else { + $self->throw('parse', "Parse error during interpolate node"); + } + } + + ### replace the tree + splice @$tree, -1, 1, @sub_tree; +} + +###----------------------------------------------------------------### + +sub play_expr { + ### allow for the parse tree to store literals + return $_[1] if ! ref $_[1]; + + my $self = shift; + my $var = shift; + my $ARGS = shift || {}; + my $i = 0; + + ### determine the top level of this particular variable access + my $ref; + my $name = $var->[$i++]; + my $args = $var->[$i++]; + warn "play_expr: begin \"$name\"\n" if trace; + if (ref $name) { + if (ref $name eq 'SCALAR') { # a scalar literal + $ref = $$name; + } elsif (ref $name eq 'REF') { # operator + return $self->play_operator($$name) if ${ $name }->[0] eq '..'; + $ref = $self->play_operator($$name); + } else { # a named variable access (ie via $name.foo) + $name = $self->play_expr($name); + if (defined $name) { + return if $name =~ $QR_PRIVATE; # don't allow vars that begin with _ + $ref = $self->{'_vars'}->{$name}; + } + } + } elsif (defined $name) { + if ($ARGS->{'is_namespace_during_compile'}) { + $ref = $self->{'NAMESPACE'}->{$name}; + } else { + return if $name =~ $QR_PRIVATE; # don't allow vars that begin with _ + $ref = $self->{'_vars'}->{$name}; + $ref = $VOBJS->{$name} if ! defined $ref; + } + } + + + my %seen_filters; + while (defined $ref) { + + ### check at each point if the rurned thing was a code + if (UNIVERSAL::isa($ref, 'CODE')) { + my @results = $ref->($args ? map { $self->play_expr($_) } @$args : ()); + if (defined $results[0]) { + $ref = ($#results > 0) ? \@results : $results[0]; + } elsif (defined $results[1]) { + die $results[1]; # TT behavior - why not just throw ? + } else { + $ref = undef; + last; + } + } + + ### descend one chained level + last if $i >= $#$var; + my $was_dot_call = $ARGS->{'no_dots'} ? 1 : $var->[$i++] eq '.'; + $name = $var->[$i++]; + $args = $var->[$i++]; + warn "play_expr: nested \"$name\"\n" if trace; + + ### allow for named portions of a variable name (foo.$name.bar) + if (ref $name) { + if (ref($name) eq 'ARRAY') { + $name = $self->play_expr($name); + if (! defined($name) || $name =~ $QR_PRIVATE || $name =~ /^\./) { + $ref = undef; + last; + } + } else { + die "Shouldn't get a ". ref($name) ." during a vivify on chain"; + } + } + if ($name =~ $QR_PRIVATE) { # don't allow vars that begin with _ + $ref = undef; + last; + } + + ### allow for scalar and filter access (this happens for every non virtual method call) + if (! ref $ref) { + if ($SCALAR_OPS->{$name}) { # normal scalar op + $ref = $SCALAR_OPS->{$name}->($ref, $args ? map { $self->play_expr($_) } @$args : ()); + + } elsif ($LIST_OPS->{$name}) { # auto-promote to list and use list op + $ref = $LIST_OPS->{$name}->([$ref], $args ? map { $self->play_expr($_) } @$args : ()); + + } elsif (my $filter = $self->{'FILTERS'}->{$name} # filter configured in Template args + || $FILTER_OPS->{$name} # predefined filters in CET + || (UNIVERSAL::isa($name, 'CODE') && $name) # looks like a filter sub passed in the stash + || $self->list_filters->{$name}) { # filter defined in Template::Filters + + if (UNIVERSAL::isa($filter, 'CODE')) { + $ref = eval { $filter->($ref) }; # non-dynamic filter - no args + if (my $err = $@) { + $self->throw('filter', $err) if ref($err) !~ /Template::Exception$/; + die $err; + } + } elsif (! UNIVERSAL::isa($filter, 'ARRAY')) { + $self->throw('filter', "invalid FILTER entry for '$name' (not a CODE ref)"); + + } elsif (@$filter == 2 && UNIVERSAL::isa($filter->[0], 'CODE')) { # these are the TT style filters + eval { + my $sub = $filter->[0]; + if ($filter->[1]) { # it is a "dynamic filter" that will return a sub + ($sub, my $err) = $sub->($self->context, $args ? map { $self->play_expr($_) } @$args : ()); + if (! $sub && $err) { + $self->throw('filter', $err) if ref($err) !~ /Template::Exception$/; + die $err; + } elsif (! UNIVERSAL::isa($sub, 'CODE')) { + $self->throw('filter', "invalid FILTER for '$name' (not a CODE ref)") + if ref($sub) !~ /Template::Exception$/; + die $sub; + } + } + $ref = $sub->($ref); + }; + if (my $err = $@) { + $self->throw('filter', $err) if ref($err) !~ /Template::Exception$/; + die $err; + } + } else { # this looks like our vmethods turned into "filters" (a filter stored under a name) + $self->throw('filter', 'Recursive filter alias \"$name\"') if $seen_filters{$name} ++; + $var = [$name, 0, '|', @$filter, @{$var}[$i..$#$var]]; # splice the filter into our current tree + $i = 2; + } + if (scalar keys %seen_filters + && $seen_filters{$var->[$i - 5] || ''}) { + $self->throw('filter', "invalid FILTER entry for '".$var->[$i - 5]."' (not a CODE ref)"); + } + } else { + $ref = undef; + } + + } else { + + ### method calls on objects + if ($was_dot_call && UNIVERSAL::can($ref, 'can')) { + my @args = $args ? map { $self->play_expr($_) } @$args : (); + my @results = eval { $ref->$name(@args) }; + if ($@) { + my $class = ref $ref; + die $@ if ref $@ || $@ !~ /Can\'t locate object method "\Q$name\E" via package "\Q$class\E"/; + } elsif (defined $results[0]) { + $ref = ($#results > 0) ? \@results : $results[0]; + next; + } elsif (defined $results[1]) { + die $results[1]; # TT behavior - why not just throw ? + } else { + $ref = undef; + last; + } + # didn't find a method by that name - so fail down to hash and array access + } + + ### hash member access + if (UNIVERSAL::isa($ref, 'HASH')) { + if ($was_dot_call && exists($ref->{$name}) ) { + $ref = $ref->{$name}; + } elsif ($HASH_OPS->{$name}) { + $ref = $HASH_OPS->{$name}->($ref, $args ? map { $self->play_expr($_) } @$args : ()); + } elsif ($ARGS->{'is_namespace_during_compile'}) { + return $var; # abort - can't fold namespace variable + } else { + $ref = undef; + } + + ### array access + } elsif (UNIVERSAL::isa($ref, 'ARRAY')) { + if ($name =~ m{ ^ -? $QR_NUM $ }ox) { + $ref = $ref->[$name]; + } elsif ($LIST_OPS->{$name}) { + $ref = $LIST_OPS->{$name}->($ref, $args ? map { $self->play_expr($_) } @$args : ()); + } else { + $ref = undef; + } + } + } + + } # end of while + + ### allow for undefinedness + if (! defined $ref) { + if ($self->{'_debug_undef'}) { + my $chunk = $var->[$i - 2]; + $chunk = $self->play_expr($chunk) if ref($chunk) eq 'ARRAY'; + die "$chunk is undefined\n"; + } else { + $ref = $self->undefined_any($var); + } + } + + return $ref; +} + +sub set_variable { + my ($self, $var, $val, $ARGS) = @_; + $ARGS ||= {}; + my $i = 0; + + ### allow for the parse tree to store literals - the literal is used as a name (like [% 'a' = 'A' %]) + $var = [$var, 0] if ! ref $var; + + ### determine the top level of this particular variable access + my $ref = $var->[$i++]; + my $args = $var->[$i++]; + if (ref $ref) { + if (ref($ref) eq 'ARRAY') { # named access (ie via $name.foo) + $ref = $self->play_expr($ref); + if (defined $ref && $ref !~ $QR_PRIVATE) { # don't allow vars that begin with _ + if ($#$var <= $i) { + return $self->{'_vars'}->{$ref} = $val; + } else { + $ref = $self->{'_vars'}->{$ref} ||= {}; + } + } else { + return; + } + } else { # all other types can't be set + return; + } + } elsif (defined $ref) { + return if $ref =~ $QR_PRIVATE; # don't allow vars that begin with _ + if ($#$var <= $i) { + return $self->{'_vars'}->{$ref} = $val; + } else { + $ref = $self->{'_vars'}->{$ref} ||= {}; + } + } + + while (defined $ref) { + + ### check at each point if the returned thing was a code + if (UNIVERSAL::isa($ref, 'CODE')) { + my @results = $ref->($args ? map { $self->play_expr($_) } @$args : ()); + if (defined $results[0]) { + $ref = ($#results > 0) ? \@results : $results[0]; + } elsif (defined $results[1]) { + die $results[1]; # TT behavior - why not just throw ? + } else { + return; + } + } + + ### descend one chained level + last if $i >= $#$var; + my $was_dot_call = $ARGS->{'no_dots'} ? 1 : $var->[$i++] eq '.'; + my $name = $var->[$i++]; + my $args = $var->[$i++]; + + ### allow for named portions of a variable name (foo.$name.bar) + if (ref $name) { + if (ref($name) eq 'ARRAY') { + $name = $self->play_expr($name); + if (! defined($name) || $name =~ /^[_.]/) { + return; + } + } else { + die "Shouldn't get a ".ref($name)." during a vivify on chain"; + } + } + if ($name =~ $QR_PRIVATE) { # don't allow vars that begin with _ + return; + } + + ### scalar access + if (! ref $ref) { + return; + + ### method calls on objects + } elsif (UNIVERSAL::can($ref, 'can')) { + my $lvalueish; + my @args = $args ? map { $self->play_expr($_) } @$args : (); + if ($i >= $#$var) { + $lvalueish = 1; + push @args, $val; + } + my @results = eval { $ref->$name(@args) }; + if (! $@) { + if (defined $results[0]) { + $ref = ($#results > 0) ? \@results : $results[0]; + } elsif (defined $results[1]) { + die $results[1]; # TT behavior - why not just throw ? + } else { + return; + } + return if $lvalueish; + next; + } + my $class = ref $ref; + die $@ if ref $@ || $@ !~ /Can\'t locate object method "\Q$name\E" via package "\Q$class\E"/; + # fall on down to "normal" accessors + } + + ### hash member access + if (UNIVERSAL::isa($ref, 'HASH')) { + if ($#$var <= $i) { + return $ref->{$name} = $val; + } else { + $ref = $ref->{$name} ||= {}; + next; + } + + ### array access + } elsif (UNIVERSAL::isa($ref, 'ARRAY')) { + if ($name =~ m{ ^ -? $QR_NUM $ }ox) { + if ($#$var <= $i) { + return $ref->[$name] = $val; + } else { + $ref = $ref->[$name] ||= {}; + next; + } + } else { + return; + } + + } + + } + + return; +} + +###----------------------------------------------------------------### + +sub play_operator { + my $self = shift; + my $tree = shift; + + if ($OP_DISPATCH->{$tree->[0]}) { + local $^W; + if ($OP_ASSIGN->{$tree->[0]}) { + my $val = $OP_DISPATCH->{$tree->[0]}->( $self->play_expr($tree->[1]), $self->play_expr($tree->[2]) ); + $self->set_variable($tree->[1], $val); + return $val; + } else { + return $OP_DISPATCH->{$tree->[0]}->( map { $self->play_expr($tree->[$_]) } 1 .. $#$tree ); + } + } + + my $op = $tree->[0]; + + ### do custom and short-circuitable operators + if ($op eq '=') { + my $val = $self->play_expr($tree->[2]); + $self->set_variable($tree->[1], $val); + return $val; + + } elsif ($op eq '||' || $op eq 'or' || $op eq 'OR') { + return $self->play_expr($tree->[1]) || $self->play_expr($tree->[2]) || ''; + + } elsif ($op eq '&&' || $op eq 'and' || $op eq 'AND') { + my $var = $self->play_expr($tree->[1]) && $self->play_expr($tree->[2]); + return $var ? $var : 0; + + } elsif ($op eq '?') { + local $^W; + return $self->play_expr($tree->[1]) ? $self->play_expr($tree->[2]) : $self->play_expr($tree->[3]); + + } elsif ($op eq '++') { + local $^W; + my $val = 0 + $self->play_expr($tree->[1]); + $self->set_variable($tree->[1], $val + 1); + return $tree->[2] ? $val : $val + 1; # ->[2] is set to 1 during parsing of postfix ops + + } elsif ($op eq '--') { + local $^W; + my $val = 0 + $self->play_expr($tree->[1]); + $self->set_variable($tree->[1], $val - 1); + return $tree->[2] ? $val : $val - 1; # ->[2] is set to 1 during parsing of postfix ops + } + + $self->throw('operator', "Un-implemented operation $op"); +} + +###----------------------------------------------------------------### + +sub parse_BLOCK { + my ($self, $tag_ref, $node) = @_; + + my $block_name = ''; + if ($$tag_ref =~ s{ ^ (\w+ (?: :\w+)*) \s* (?! [\.\|]) }{}x + || $$tag_ref =~ s{ ^ '(|.*?[^\\])' \s* (?! [\.\|]) }{}x + || $$tag_ref =~ s{ ^ "(|.*?[^\\])" \s* (?! [\.\|]) }{}x + ) { + $block_name = $1; + ### allow for nested blocks to have nested names + my @names = map {$_->[3]} grep {$_->[0] eq 'BLOCK'} @{ $self->{'_state'} }; + $block_name = join("/", @names, $block_name) if scalar @names; + } + + return $block_name; +} + +sub play_BLOCK { + my ($self, $block_name, $node, $out_ref) = @_; + + ### store a named reference - but do nothing until something processes it + $self->{'BLOCKS'}->{$block_name} = { + _tree => $node->[4], + name => $self->{'_vars'}->{'component'}->{'name'} .'/'. $block_name, + }; + + return; +} + +sub parse_CALL { $DIRECTIVES->{'GET'}->[0]->(@_) } + +sub play_CALL { $DIRECTIVES->{'GET'}->[1]->(@_); return } -__END__ +sub parse_CASE { + my ($self, $tag_ref) = @_; + return if $$tag_ref =~ s{ ^ DEFAULT \s* }{}x; + return $self->parse_expr($tag_ref); +} + +sub parse_CATCH { + my ($self, $tag_ref) = @_; + return $self->parse_expr($tag_ref, {auto_quote => qr{ ^ (\w+ (?: \.\w+)*) $QR_AQ_SPACE }xo}); +} + +sub play_control { + my ($self, $undef, $node) = @_; + $self->throw(lc($node->[0]), 'Control exception', $node); +} + +sub play_CLEAR { + my ($self, $undef, $node, $out_ref) = @_; + $$out_ref = ''; +} + +sub parse_DEBUG { + my ($self, $tag_ref) = @_; + $$tag_ref =~ s{ ^ (on | off | format) \s* }{}xi || $self->throw('parse', "Unknown DEBUG option"); + my $ret = [lc($1)]; + if ($ret->[0] eq 'format') { + $$tag_ref =~ s{ ^ ([\"\']) (|.*?[^\\]) \1 \s* }{}xs || $self->throw('parse', "Missing format string"); + $ret->[1] = $2; + } + return $ret; +} + +sub play_DEBUG { + my ($self, $ref) = @_; + if ($ref->[0] eq 'on') { + delete $self->{'_debug_off'}; + } elsif ($ref->[0] eq 'off') { + $self->{'_debug_off'} = 1; + } elsif ($ref->[0] eq 'format') { + $self->{'_debug_format'} = $ref->[1]; + } +} + +sub parse_DEFAULT { $DIRECTIVES->{'SET'}->[0]->(@_) } + +sub play_DEFAULT { + my ($self, $set) = @_; + foreach (@$set) { + my ($op, $set, $default) = @$_; + next if ! defined $set; + my $val = $self->play_expr($set); + if (! $val) { + $default = defined($default) ? $self->play_expr($default) : ''; + $self->set_variable($set, $default); + } + } + return; +} + +sub parse_DUMP { + my ($self, $tag_ref) = @_; + my $ref = $self->parse_expr($tag_ref); + return $ref; +} + +sub play_DUMP { + my ($self, $ident, $node) = @_; + require Data::Dumper; + local $Data::Dumper::Sortkeys = 1; + my $info = $self->node_info($node); + my $out; + my $var; + if ($ident) { + $out = Data::Dumper::Dumper($self->play_expr($ident)); + $var = $info->{'text'}; + $var =~ s/^[+\-~=]?\s*DUMP\s+//; + $var =~ s/\s*[+\-~=]?$//; + } else { + my @were_never_here = (qw(template component), grep {$_ =~ $QR_PRIVATE} keys %{ $self->{'_vars'} }); + local @{ $self->{'_vars'} }{ @were_never_here }; + delete @{ $self->{'_vars'} }{ @were_never_here }; + $out = Data::Dumper::Dumper($self->{'_vars'}); + $var = 'EntireStash'; + } + if ($ENV{'REQUEST_METHOD'}) { + $out =~ s/</g; + $out = "
$out"; + $out =~ s/\$VAR1/$var/; + $out = "DUMP: File \"$info->{file}\" line $info->{line}$out"; + } else { + $out =~ s/\$VAR1/$var/; + } + + return $out; +} + +sub parse_FILTER { + my ($self, $tag_ref) = @_; + my $name = ''; + if ($$tag_ref =~ s{ ^ ([^\W\d]\w*) \s* = \s* }{}x) { + $name = $1; + } + + my $filter = $self->parse_expr($tag_ref); + $filter = '' if ! defined $filter; + + return [$name, $filter]; +} + +sub play_FILTER { + my ($self, $ref, $node, $out_ref) = @_; + my ($name, $filter) = @$ref; + + return '' if ! @$filter; + + $self->{'FILTERS'}->{$name} = $filter if length $name; + + my $sub_tree = $node->[4]; + + ### play the block + my $out = ''; + eval { $self->execute_tree($sub_tree, \$out) }; + die $@ if $@ && ref($@) !~ /Template::Exception$/; + + my $var = [\$out, 0, '|', @$filter]; # make a temporary var out of it + + + return $DIRECTIVES->{'GET'}->[1]->($self, $var, $node, $out_ref); +} -=head1 NAME +sub parse_FOREACH { + my ($self, $tag_ref) = @_; + my $items = $self->parse_expr($tag_ref); + my $var; + if ($$tag_ref =~ s{ ^ (= | [Ii][Nn]\b) \s* }{}x) { + $var = [@$items]; + $items = $self->parse_expr($tag_ref); + } + return [$var, $items]; +} + +sub play_FOREACH { + my ($self, $ref, $node, $out_ref) = @_; + + ### get the items - make sure it is an arrayref + my ($var, $items) = @$ref; + + $items = $self->play_expr($items); + return '' if ! defined $items; + + if (ref($items) !~ /Iterator$/) { + $items = $PACKAGE_ITERATOR->new($items); + } + + my $sub_tree = $node->[4]; + + local $self->{'_vars'}->{'loop'} = $items; + + ### if the FOREACH tag sets a var - then nothing but the loop var gets localized + if (defined $var) { + my ($item, $error) = $items->get_first; + while (! $error) { + + $self->set_variable($var, $item); + + ### execute the sub tree + eval { $self->execute_tree($sub_tree, $out_ref) }; + if (my $err = $@) { + if (UNIVERSAL::isa($err, $PACKAGE_EXCEPTION)) { + if ($err->type eq 'next') { + ($item, $error) = $items->get_next; + next; + } + last if $err->type =~ /last|break/; + } + die $err; + } + + ($item, $error) = $items->get_next; + } + die $error if $error && $error != 3; # Template::Constants::STATUS_DONE; + ### if the FOREACH tag doesn't set a var - then everything gets localized + } else { + + ### localize variable access for the foreach + my $swap = $self->{'_vars'}; + local $self->{'_vars'} = my $copy = {%$swap}; + + ### iterate use the iterator object + #foreach (my $i = $items->index; $i <= $#$vals; $items->index(++ $i)) { + my ($item, $error) = $items->get_first; + while (! $error) { + + if (ref($item) eq 'HASH') { + @$copy{keys %$item} = values %$item; + } + + ### execute the sub tree + eval { $self->execute_tree($sub_tree, $out_ref) }; + if (my $err = $@) { + if (UNIVERSAL::isa($err, $PACKAGE_EXCEPTION)) { + if ($err->type eq 'next') { + ($item, $error) = $items->get_next; + next; + } + last if $err->type =~ /last|break/; + } + die $err; + } + + ($item, $error) = $items->get_next; + } + die $error if $error && $error != 3; # Template::Constants::STATUS_DONE; + } -CGI::Ex::Template - Beginning interface to Templating systems - for they are many + return undef; +} + +sub parse_GET { + my ($self, $tag_ref) = @_; + my $ref = $self->parse_expr($tag_ref); + $self->throw('parse', "Missing variable name") if ! defined $ref; + return $ref; +} + +sub play_GET { + my ($self, $ident, $node) = @_; + my $var = $self->play_expr($ident); + return (! defined $var) ? $self->undefined_get($ident, $node) : $var; +} + +sub parse_IF { + my ($self, $tag_ref) = @_; + return $self->parse_expr($tag_ref); +} + +sub play_IF { + my ($self, $var, $node, $out_ref) = @_; -=head1 SYNOPSIS + my $val = $self->play_expr($var); + if ($val) { + my $body_ref = $node->[4] ||= []; + $self->execute_tree($body_ref, $out_ref); + return; + } - None yet. + while ($node = $node->[5]) { # ELSE, ELSIF's + if ($node->[0] eq 'ELSE') { + my $body_ref = $node->[4] ||= []; + $self->execute_tree($body_ref, $out_ref); + return; + } + my $var = $node->[3]; + my $val = $self->play_expr($var); + if ($val) { + my $body_ref = $node->[4] ||= []; + $self->execute_tree($body_ref, $out_ref); + return; + } + } + return; +} + +sub parse_INCLUDE { $DIRECTIVES->{'PROCESS'}->[0]->(@_) } + +sub play_INCLUDE { + my ($self, $tag_ref, $node, $out_ref) = @_; + + ### localize the swap + my $swap = $self->{'_vars'}; + local $self->{'_vars'} = {%$swap}; + + ### localize the blocks + my $blocks = $self->{'BLOCKS'}; + local $self->{'BLOCKS'} = {%$blocks}; + + my $str = $DIRECTIVES->{'PROCESS'}->[1]->($self, $tag_ref, $node, $out_ref); + + return $str; +} -=head1 DESCRIPTION +sub parse_INSERT { $DIRECTIVES->{'PROCESS'}->[0]->(@_) } -=head1 AUTHORS +sub play_INSERT { + my ($self, $var, $node, $out_ref) = @_; + my ($names, $args) = @$var; -Paul Seamons