/usr/share/perl5/Template/Alloy/Play.pm is in libtemplate-alloy-perl 1.016-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 | package Template::Alloy::Play;
=head1 NAME
Template::Alloy::Play - Play role - allows for playing out the AST
=cut
use strict;
use warnings;
use Template::Alloy;
use Template::Alloy::Iterator;
use Template::Alloy::Context;
our $VERSION = $Template::Alloy::VERSION;
our $QR_NUM = '(?:\d*\.\d+ | \d+)';
our $DIRECTIVES = {
BLOCK => \&play_BLOCK,
BREAK => \&play_control,
CALL => \&play_CALL,
CASE => undef,
CATCH => undef,
CLEAR => \&play_CLEAR,
'#' => sub {},
COMMENT => sub {},
CONFIG => \&play_CONFIG,
DEBUG => \&play_DEBUG,
DEFAULT => \&play_DEFAULT,
DUMP => \&play_DUMP,
ELSE => undef,
ELSIF => undef,
END => sub {},
EVAL => \&play_EVAL,
FILTER => \&play_FILTER,
'|' => \&play_FILTER,
FINAL => undef,
FOR => \&play_FOR,
FOREACH => \&play_FOR,
GET => \&play_GET,
IF => \&play_IF,
INCLUDE => \&play_INCLUDE,
INSERT => \&play_INSERT,
LAST => \&play_control,
LOOP => \&play_LOOP,
MACRO => \&play_MACRO,
META => \&play_META,
NEXT => \&play_control,
PERL => \&play_PERL,
PROCESS => \&play_PROCESS,
RAWPERL => \&play_RAWPERL,
RETURN => \&play_RETURN,
SET => \&play_SET,
STOP => \&play_control,
SWITCH => \&play_SWITCH,
TAGS => sub {},
THROW => \&play_THROW,
TRY => \&play_TRY,
UNLESS => \&play_UNLESS,
USE => \&play_USE,
VIEW => \&play_VIEW,
WHILE => \&play_WHILE,
WRAPPER => \&play_WRAPPER,
};
sub new { die "This class is a role for use by packages such as Template::Alloy" }
###----------------------------------------------------------------###
sub play_tree {
my ($self, $tree, $out_ref) = @_;
return $self->stream_tree($tree) if $self->{'STREAM'};
# 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) {
$$out_ref .= $node if defined $node;
next;
}
$$out_ref .= $self->debug_node($node) if $self->{'_debug_dirs'} && ! $self->{'_debug_off'};
$DIRECTIVES->{$node->[0]}->($self, $node->[3], $node, $out_ref);
}
}
sub _is_empty_named_args {
my ($hash_ident) = @_;
# [[undef, '{}', 'key1', 'val1', 'key2, 'val2'], 0]
return @{ $hash_ident->[0] } <= 2;
}
###----------------------------------------------------------------###
sub play_BLOCK {
my ($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->{'_component'}->{'name'} .'/'. $block_name,
};
return;
}
sub play_CALL {
my ($self, $ident, $node) = @_;
my $var = $self->play_expr($ident);
$var = $self->undefined_get($ident, $node) if ! defined $var;
return;
}
sub play_control {
my ($self, $undef, $node) = @_;
$self->throw(lc($node->[0]), 'Control exception', $node);
}
sub play_CLEAR {
my ($self, $undef, $node, $out_ref) = @_;
$$out_ref = '';
return;
}
sub play_CONFIG {
my ($self, $config, $node, $out_ref) = @_;
my %rtime = map {$_ => 1} @Template::Alloy::CONFIG_RUNTIME;
### do runtime config - not many options get these
my ($named, @the_rest) = @$config;
$named = $self->play_expr($named);
$self->throw("config.strict", "Cannot disable STRICT once it is enabled", $node) if exists $named->{'STRICT'} && ! $named->{'STRICT'};
@{ $self }{keys %$named} = @{ $named }{keys %$named};
### show what current values are
$$out_ref .= join("\n", map { $rtime{$_} ? ("CONFIG $_ = ".(defined($self->{$_}) ? $self->{$_} : 'undef')) : $_ } @the_rest);
return;
}
sub play_DEBUG {
my ($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'} = $ref->[1];
}
return;
}
sub play_DEFAULT {
my ($self, $set) = @_;
foreach my $item (@$set) {
my ($op, $set, $default) = @$item;
next if ! defined $set;
my $val = $self->play_expr($set);
if (! $val) {
$default = defined($default) ? $self->play_expr($default) : '';
$self->set_variable($set, $default);
}
}
return;
}
sub play_DUMP {
my ($self, $dump, $node, $out_ref) = @_;
my $conf = $self->{'DUMP'};
return if ! $conf && defined $conf; # DUMP => 0
$conf = {} if ref $conf ne 'HASH';
### allow for handler override
my $handler = $conf->{'handler'};
if (! $handler) {
require Data::Dumper;
my $obj = Data::Dumper->new([]);
my $meth;
foreach my $prop (keys %$conf) { $obj->$prop($conf->{$prop}) if $prop =~ /^\w+$/ && ($meth = $obj->can($prop)) }
my $sort = defined($conf->{'Sortkeys'}) ? $obj->Sortkeys : 1;
$obj->Sortkeys(sub { my $h = shift; [grep {! $Template::Alloy::QR_PRIVATE
|| $_ !~ $Template::Alloy::QR_PRIVATE} ($sort ? sort keys %$h : keys %$h)] });
$handler = sub { $obj->Values([@_]); $obj->Dump }
}
my ($named, @dump) = @$dump;
push @dump, $named if ! _is_empty_named_args($named); # add named args back on at end - if there are some
$_ = $self->play_expr($_) foreach @dump;
### look for the text describing what to dump
my $info = $self->node_info($node);
my $out;
if (@dump) {
$out = $handler->(@dump && @dump == 1 ? $dump[0] : \@dump);
my $name = $info->{'text'};
$name =~ s/^[+=~-]?\s*DUMP\s+//;
$name =~ s/\s*[+=~-]?$//;
$out =~ s/\$VAR1/$name/;
} elsif (defined($conf->{'EntireStash'}) && ! $conf->{'EntireStash'}) {
$out = '';
} else {
$out = $handler->($self->{'_vars'});
$out =~ s/\$VAR1/EntireStash/g;
}
if ($conf->{'html'} || (! defined($conf->{'html'}) && $ENV{'REQUEST_METHOD'})) {
$out = $Template::Alloy::SCALAR_OPS->{'xml'}->($out);
$out = "<pre>$out</pre>";
$out = "<b>DUMP: File \"$info->{file}\" line $info->{line}</b>$out" if $conf->{'header'} || ! defined $conf->{'header'};
} else {
$out = "DUMP: File \"$info->{file}\" line $info->{line}\n $out" if $conf->{'header'} || ! defined $conf->{'header'};
}
$$out_ref .= $out;
return;
}
sub play_EVAL {
my ($self, $ref, $node, $out_ref) = @_;
my ($named, @strs) = @$ref;
foreach my $str (@strs) {
$str = $self->play_expr($str);
next if ! defined $str;
$str = $self->play_expr([[undef, '-temp-', $str], 0, '|', 'eval', [$named]]);
$$out_ref .= $str if defined $str;
}
return;
}
sub play_FILTER {
my ($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 { local $self->{'STREAM'} = undef; $self->play_tree($sub_tree, \$out) };
die $@ if $@ && ! UNIVERSAL::can($@, 'type'); # TODO - shouldn't they all die ?
$out = $self->play_expr([[undef, '-temp-', $out], 0, '|', @$filter]);
$$out_ref .= $out if defined $out;
return;
}
sub play_FOR {
my ($self, $ref, $node, $out_ref) = @_;
### get the items - make sure it is an arrayref
my ($var, $items) = @$ref;
$items = $self->play_expr($items);
return '' if ! defined $items;
if (ref($items) !~ /Iterator$/) {
$items = $self->iterator($items);
}
my $sub_tree = $node->[4];
local $self->{'_vars'}->{'loop'} = $items;
### if the FOREACH tag sets a var - then nothing but the loop var gets localized
if (defined $var) {
my ($item, $error) = $items->get_first;
while (! $error) {
$self->set_variable($var, $item);
eval { $self->play_tree($sub_tree, $out_ref) };
if (my $err = $@) {
die $err if ! UNIVERSAL::can($err, 'type');
last if $err->type =~ /last|break/;
die if $err->type ne 'next';
}
($item, $error) = $items->get_next;
}
die $error if $error && $error != 3; # Template::Constants::STATUS_DONE;
### if the FOREACH tag doesn't set a var - then everything gets localized
} else {
### localize variable access for the foreach
my $swap = $self->{'_vars'};
local $self->{'_vars'} = my $copy = {%$swap};
### iterate use the iterator object
#foreach (my $i = $items->index; $i <= $#$vals; $items->index(++ $i)) {
my ($item, $error) = $items->get_first;
while (! $error) {
@$copy{keys %$item} = values %$item if ref($item) eq 'HASH';
eval { $self->play_tree($sub_tree, $out_ref) };
if (my $err = $@) {
die $err if ! UNIVERSAL::can($err, 'type');
last if $err->type =~ /last|break/;
die if $err->type ne 'next';
}
($item, $error) = $items->get_next;
}
die $error if $error && $error != 3; # Template::Constants::STATUS_DONE;
}
return;
}
sub play_GET {
my ($self, $ident, $node, $out_ref) = @_;
my $var = $self->play_expr($ident);
if (defined $var) {
$$out_ref .= $var;
} else {
$var = $self->undefined_get($ident, $node);
$$out_ref .= $var if defined $var;
}
return;
}
sub play_IF {
my ($self, $var, $node, $out_ref) = @_;
my $val = $self->play_expr($var);
if ($val) {
my $body_ref = $node->[4] ||= [];
$self->play_tree($body_ref, $out_ref);
return;
}
while ($node = $node->[5]) { # ELSE, ELSIF's
if ($node->[0] eq 'ELSE') {
my $body_ref = $node->[4] ||= [];
$self->play_tree($body_ref, $out_ref);
return;
}
my $var = $node->[3];
my $val = $self->play_expr($var);
if ($val) {
my $body_ref = $node->[4] ||= [];
$self->play_tree($body_ref, $out_ref);
return;
}
}
return;
}
sub play_INCLUDE {
my ($self, $str_ref, $node, $out_ref) = @_;
### localize the swap
my $swap = $self->{'_vars'} || {};
local $self->{'_vars'} = {%$swap};
### localize the blocks
my $blocks = $self->{'BLOCKS'} || {};
local $self->{'BLOCKS'} = {%$blocks};
return $DIRECTIVES->{'PROCESS'}->($self, $str_ref, $node, $out_ref);
}
sub play_INSERT {
my ($self, $args, $node, $out_ref) = @_;
if ($self->{'NO_INCLUDES'}) {
$self->throw('file', "NO_INCLUDES was set during a $node->[0] directive");
}
my ($named, @files) = @$args;
foreach my $name (@files) {
my $file = $self->play_expr($name);
my $ref = $self->slurp($self->include_filename($file));
$$out_ref .= $$ref;
}
return;
}
sub play_LOOP {
my ($self, $ref, $node, $out_ref) = @_;
my $var = $self->play_expr(ref($ref) ? $ref : [$ref,0]); # allow for "string" identified loops
my $sub_tree = $node->[4];
my $global = ! $self->{'SYNTAX'} || $self->{'SYNTAX'} ne 'ht' || $self->{'GLOBAL_VARS'};
my $items = ref($var) eq 'ARRAY' ? $var : ref($var) eq 'HASH' ? [$var] : [];
my $i = 0;
for my $ref (@$items) {
### setup the loop
$self->throw('loop', 'Scalar value used in LOOP') if $ref && ref($ref) ne 'HASH';
local $self->{'_vars'} = (! $global) ? ($ref || {}) : (ref($ref) eq 'HASH') ? {%{ $self->{'_vars'} }, %$ref} : $self->{'_vars'};
if ($self->{'LOOP_CONTEXT_VARS'} && ! $Template::Alloy::QR_PRIVATE) {
$self->{'_vars'}->{'__counter__'} = ++$i;
$self->{'_vars'}->{'__first__'} = $i == 1 ? 1 : 0;
$self->{'_vars'}->{'__last__'} = $i == @$items ? 1 : 0;
$self->{'_vars'}->{'__inner__'} = $i == 1 || $i == @$items ? 0 : 1;
$self->{'_vars'}->{'__odd__'} = ($i % 2) ? 1 : 0;
}
### execute the sub tree
$self->play_tree($sub_tree, $out_ref);
}
return;
}
sub play_MACRO {
my ($self, $ref, $node, $out_ref) = @_;
my ($name, $args) = @$ref;
### get the sub tree
my $sub_tree = $node->[4];
if (! $sub_tree || ! $sub_tree->[0]) {
$self->set_variable($name, undef);
return;
} elsif (ref($sub_tree->[0]) && $sub_tree->[0]->[0] eq 'BLOCK') {
$sub_tree = $sub_tree->[0]->[4];
}
### install a closure in the stash that will handle the macro
$self->set_variable($name, $self->_macro_sub($args, $sub_tree, $out_ref));
return;
}
sub _macro_sub {
my ($self, $args, $sub_tree, $out_ref) = @_;
my $self_copy = $self;
my $sub = sub {
### macros localize
my $copy = $self_copy->{'_vars'};
local $self_copy->{'_vars'}= {%$copy};
### prevent recursion
local $self_copy->{'_macro_recurse'} = $self_copy->{'_macro_recurse'} || 0;
my $max = $self_copy->{'MAX_MACRO_RECURSE'} || $Template::Alloy::MAX_MACRO_RECURSE;
$self_copy->throw('macro_recurse', "MAX_MACRO_RECURSE $max reached")
if ++$self_copy->{'_macro_recurse'} > $max;
### set arguments
my $named = pop(@_) if $_[-1] && UNIVERSAL::isa($_[-1],'HASH') && $#_ > $#$args;
my @positional = @_;
foreach my $var (@$args) {
$self_copy->set_variable($var, shift(@positional));
}
foreach my $name (sort keys %$named) {
$self_copy->set_variable([$name, 0], $named->{$name});
}
local $self->{'STREAM'} = undef;
### finally - run the sub tree
my $out = '';
eval { $self_copy->play_tree($sub_tree, \$out) };
if (my $err = $@) {
die $err if $err->type ne 'return';
return $err->info->{'return_val'} if UNIVERSAL::isa($err->info, 'HASH');
return;
}
return $out;
};
eval {require Scalar::Util; Scalar::Util::weaken($self_copy)};
return $sub;
}
sub play_META {
my ($self, $hash) = @_;
return if ! $hash;
my @keys = keys %$hash;
my $ref;
if ($self->{'_top_level'}) {
$ref = $self->{'_template'} ||= {};
} else {
$ref = $self->{'_component'} ||= {};
}
@{ $ref }{ @keys } = @{ $hash }{ @keys };
return;
}
sub play_PERL {
my ($self, $info, $node, $out_ref) = @_;
$self->throw('perl', 'EVAL_PERL not set') if ! $self->{'EVAL_PERL'};
### fill in any variables
my $perl = $node->[4] || return;
my $out = '';
{
local $self->{'STREAM'} = undef;
$self->play_tree($perl, \$out);
};
$out = $1 if $out =~ /^(.+)$/s; # blatant untaint - shouldn't use perl anyway
### try the code
my $err;
eval {
package Template::Alloy::Perl;
my $context = $self->context;
my $stash = $context->stash;
### setup a fake handle
local *PERLOUT;
tie *PERLOUT, 'Template::Alloy::EvalPerlHandle', $out_ref;
my $old_fh = select PERLOUT;
eval $out;
$err = $@;
### put the handle back
select $old_fh;
};
$err ||= $@;
if ($err) {
$self->throw('undef', $err) if ! UNIVERSAL::can($err, 'type');
die $err;
}
return;
}
sub play_PROCESS {
my ($self, $info, $node, $out_ref) = @_;
if ($self->{'NO_INCLUDES'}) {
$self->throw('file', "NO_INCLUDES was set during a $node->[0] directive");
}
my ($args, @files) = @$info;
### process files first
foreach my $ref (@files) {
$ref = $self->play_expr($ref) if defined $ref;
}
### set passed args
# [[undef, '{}', 'key1', 'val1', 'key2', 'val2'], 0]
$args = $args->[0];
foreach (my $i = 2; $i < @$args; $i+=2) {
my $key = $args->[$i];
my $val = $self->play_expr($args->[$i+1]);
if (ref($key) && @$key == 2 && $key->[0] eq 'import' && UNIVERSAL::isa($val, 'HASH')) { # import ?! - whatever
foreach my $key (keys %$val) {
$self->set_variable([$key,0], $val->{$key});
}
next;
}
$self->set_variable($key, $val);
}
### iterate on any passed block or filename
foreach my $filename (@files) {
next if ! defined $filename;
my $out = ''; # have temp item to allow clear to correctly clear
### normal blocks or filenames
if (! ref($filename) || ref($filename) eq 'SCALAR') {
eval { $self->_process($filename, $self->{'_vars'}, \$out) }; # restart the swap - passing it our current stash
### allow for $template which is used in some odd instances
} else {
my $doc = $filename;
$self->throw('process', "Recursion detected in $node->[0] \$template") if $self->{'_process_dollar_template'};
local $self->{'_process_dollar_template'} = 1;
local $self->{'_component'} = $doc;
### run the document however we can
if (ref($doc) ne 'HASH' || (! $doc->{'_perl'} && ! $doc->{'_tree'})) {
$self->throw('process', "Passed item doesn't appear to be a valid document");
} elsif ($doc->{'_perl'}) {
eval { $doc->{'_perl'}->{'code'}->($self, \$out) };
} else {
eval { $self->play_tree($doc->{'_tree'}, \$out) };
}
if ($self->{'TRIM'}) {
$out =~ s{ \s+ $ }{}x;
$out =~ s{ ^ \s+ }{}x;
}
### handle exceptions
if (my $err = $@) {
$err = $self->exception('undef', $err) if ! UNIVERSAL::can($err, 'type');
$err->doc($doc) if $doc && $err->can('doc') && ! $err->doc;
}
}
### append any output
$$out_ref .= $out;
if (my $err = $@) {
die $err if ! UNIVERSAL::can($err, 'type') || $err->type !~ /return/;
}
}
return;
}
sub play_RAWPERL {
my ($self, $info, $node, $out_ref) = @_;
$self->throw('perl', 'EVAL_PERL not set') if ! $self->{'EVAL_PERL'};
### fill in any variables
my $tree = $node->[4] || return;
my $perl = '';
{
local $self->{'STREAM'} = undef;
$self->play_tree($tree, \$perl);
}
$perl = $1 if $perl =~ /^(.+)$/s; # blatant untaint - shouldn't use perl anyway
### try the code
my $err;
my $output = '';
eval {
package Template::Alloy::Perl;
my $context = $self->context;
my $stash = $context->stash;
eval $perl;
$err = $@;
};
$err ||= $@;
$$out_ref .= $output;
if ($err) {
$self->throw('undef', $err) if ! UNIVERSAL::can($err, 'type');
die $err;
}
return;
}
sub play_RETURN {
my ($self, $undef, $node) = @_;
my $var = $node->[3];
$var = {return_val => $self->play_expr($var)} if defined $var;
$self->throw('return', $var, $node);
}
sub play_SET {
my ($self, $set, $node) = @_;
foreach my $item (@$set) {
my ($op, $set, $val) = @$item;
if (! defined $val) { # not defined
# do nothing - allow for setting to undef
} elsif ($node->[4] && $val == $node->[4]) { # a captured directive
my $sub_tree = $node->[4];
$sub_tree = $sub_tree->[0]->[4] if $sub_tree->[0] && $sub_tree->[0]->[0] eq 'BLOCK';
$val = '';
local $self->{'STREAM'} = undef;
$self->play_tree($sub_tree, \$val);
} else { # normal var
$val = $self->play_expr($val);
}
$self->set_variable($set, $val);
}
return;
}
sub play_SWITCH {
my ($self, $var, $node, $out_ref) = @_;
my $val = $self->play_expr($var);
$val = '' if ! defined $val;
### $node->[4] is thrown away
my $default;
while ($node = $node->[5]) { # CASES
my $var = $node->[3];
if (! defined $var) {
$default = $node->[4];
next;
}
my $val2 = $self->play_expr($var);
$val2 = [$val2] if ! UNIVERSAL::isa($val2, 'ARRAY');
for my $test (@$val2) { # find matching values
next if ! defined $val && defined $test;
next if defined $val && ! defined $test;
next if $val ne $test;
my $body_ref = $node->[4] ||= [];
$self->play_tree($body_ref, $out_ref);
return;
}
}
if ($default) {
$self->play_tree($default, $out_ref);
}
return;
}
sub play_THROW {
my ($self, $ref, $node) = @_;
my ($name, $args) = @$ref;
$name = $self->play_expr($name);
my ($named, @args) = @$args;
push @args, $named if ! _is_empty_named_args($named); # add named args back on at end - if there are some
@args = map { $self->play_expr($_) } @args;
$self->throw($name, \@args, $node); # dies
return; # but return just in case
}
sub play_TRY {
my ($self, $foo, $node, $out_ref) = @_;
my $out = '';
my $body_ref = $node->[4];
eval { $self->play_tree($body_ref, \$out) };
my $err = $@;
if (! $node->[5]) { # no catch or final
if (! $err) { # no final block and no error
$$out_ref .= $out;
return;
}
$self->throw('parse.missing', "Missing CATCH block", $node);
}
if ($err) {
$err = $self->exception('undef', $err) if ! UNIVERSAL::can($err, 'type');
if ($err->type =~ /stop|return/) {
$$out_ref .= $out;
die $err;
}
}
### loop through the nested catch and final blocks
my $catch_body_ref;
my $last_found;
my $type = $err ? $err->type : '';
my $final;
while ($node = $node->[5]) { # CATCH
if ($node->[0] eq 'FINAL') {
$final = $node->[4];
next;
}
next if ! $err;
my $name = $self->play_expr($node->[3]);
$name = '' if ! defined $name || lc($name) eq 'default';
if ($type =~ / ^ \Q$name\E \b /x
&& (! defined($last_found) || length($last_found) < length($name))) { # more specific wins
$catch_body_ref = $node->[4] || [];
$last_found = $name;
}
}
### play the best catch block
if ($err) {
if (! $catch_body_ref) {
$$out_ref .= $out;
die $err;
}
local $self->{'_vars'}->{'error'} = $err;
local $self->{'_vars'}->{'e'} = $err;
eval { $self->play_tree($catch_body_ref, \$out) };
if (my $err = $@) {
$$out_ref .= $out;
die $err;
}
}
### the final block
$self->play_tree($final, \$out) if $final;
$$out_ref .= $out;
return;
}
sub play_UNLESS { return $DIRECTIVES->{'IF'}->(@_) }
sub play_USE {
my ($self, $ref, $node, $out_ref) = @_;
my ($var, $module, $args) = @$ref;
### get the stash storage location - default to the module
$var = $module if ! defined $var;
my @var = map {($_, 0, '.')} split /(?:\.|::)/, $var;
pop @var; # remove the trailing '.'
my ($named, @args) = @$args;
push @args, $named if ! _is_empty_named_args($named); # add named args back on at end - if there are some
### try and load the module - fall back to bare module if allowed
my $obj;
if (my $fact = $self->{'PLUGIN_FACTORY'}->{$module} || $self->{'PLUGIN_FACTORY'}->{lc $module}) {
if (UNIVERSAL::isa($fact, 'CODE')) {
$obj = $fact->($self->context, map { $self->play_expr($_) } @args);
}
} elsif (my $pkg = $self->{'PLUGINS'}->{$module} || $self->{'PLUGINS'}->{lc $module}) {
(my $req = "$pkg.pm") =~ s|::|/|g;
if (UNIVERSAL::isa($pkg, 'UNIVERSAL') || eval { require $req }) {
my $shape = $pkg->load;
$obj = $shape->new($self->context, map { $self->play_expr($_) } @args);
}
} elsif (lc($module) eq 'iterator') { # use our iterator if none found (TT's works fine too)
$obj = $self->iterator($args[0]);
} else {
my $found;
my $BASE = $self->{'PLUGIN_BASE'};
foreach my $base ((ref($BASE) eq 'ARRAY' ? @$BASE : $BASE), (my $e = 'TP-Fallback')) {
if ($base && $base eq 'TP-Fallback' && eval { require Template::Plugins }) { # want to allow Template::Plugins without requiring we use them
$base = $Template::Plugins::PLUGIN_BASE || next;
if ($Template::Plugins::STD_PLUGINS
&& (my $pkg = $Template::Plugins::STD_PLUGINS->{lc $module})) {
(my $req = "$pkg.pm") =~ s|::|/|g;
$found = 1;
if (eval { require $req }) {
my $shape = $pkg->load;
$obj = $shape->new($self->context, map { $self->play_expr($_) } @args);
}
last;
}
}
next if ! $base;
my $pkg = "${base}::${module}";
(my $req = "$pkg.pm") =~ s|::|/|g;
if (UNIVERSAL::isa($pkg, 'UNIVERSAL') || eval { require $req }) {
my $shape = $pkg->load;
$obj = $shape->new($self->context, map { $self->play_expr($_) } @args);
$found = 1;
last;
}
}
if (! $found && $self->{'LOAD_PERL'}) {
(my $req = "$module.pm") =~ s|::|/|g;
if (UNIVERSAL::isa($module, 'UNIVERSAL') || eval { require $req }) {
$obj = $module->new(map { $self->play_expr($_) } @args);
}
}
}
if (! defined $obj) {
my $err = "$module: plugin not found";
$self->throw('plugin', $err);
}
$self->set_variable(\@var, $obj);
return;
}
sub play_VIEW {
my ($self, $ref, $node, $out_ref) = @_;
my ($blocks, $args, $name) = @$ref;
### get args ready
# [[undef, '{}', 'key1', 'val1', 'key2', 'val2'], 0]
$args = $args->[0];
my $hash = {};
foreach (my $i = 2; $i < @$args; $i+=2) {
my $key = $args->[$i];
my $val = $self->play_expr($args->[$i+1]);
if (ref $key) {
if (@$key == 2 && ! ref($key->[0]) && ! $key->[1]) {
$key = $key->[0];
} else {
$self->set_variable($key, $val);
next; # what TT does
}
}
$hash->{$key} = $val;
}
### prepare the blocks
my $prefix = $hash->{'prefix'} || (ref($name) && @$name == 2 && ! $name->[1] && ! ref($name->[0])) ? "$name->[0]/" : '';
foreach my $key (keys %$blocks) {
$blocks->{$key} = {name => "${prefix}${key}", _tree => $blocks->{$key}};
}
$hash->{'blocks'} = $blocks;
### get the view
if (! eval { require Template::View }) {
$self->throw('view', 'Could not load Template::View library');
}
my $view = Template::View->new($self->context, $hash)
|| $self->throw('view', $Template::View::ERROR);
### 'play it'
my $old_view = $self->play_expr(['view', 0]);
$self->set_variable($name, $view);
$self->set_variable(['view', 0], $view);
if ($node->[4]) {
my $out = '';
$self->play_tree($node->[4], \$out);
# throw away $out
}
$self->set_variable(['view', 0], $old_view);
$view->seal;
return;
}
sub play_WHILE {
my ($self, $var, $node, $out_ref) = @_;
return if ! defined $var;
my $sub_tree = $node->[4];
### iterate use the iterator object
my $count = $Template::Alloy::WHILE_MAX;
while (--$count > 0) {
$self->play_expr($var) || last;
### execute the sub tree
eval { $self->play_tree($sub_tree, $out_ref) };
if (my $err = $@) {
if (UNIVERSAL::can($err, 'type')) {
next if $err->type =~ /next/;
last if $err->type =~ /last|break/;
}
die $err;
}
}
die "WHILE loop terminated (> $Template::Alloy::WHILE_MAX iterations)\n" if ! $count;
return;
}
sub play_WRAPPER {
my ($self, $args, $node, $out_ref) = @_;
my $sub_tree = $node->[4] || return;
my ($named, @files) = @$args;
my $out = '';
{
local $self->{'STREAM'} = undef;
$self->play_tree($sub_tree, \$out);
foreach my $name (reverse @files) {
local $self->{'_vars'}->{'content'} = $out;
$out = '';
$DIRECTIVES->{'INCLUDE'}->($self, [$named, $name], $node, \$out);
}
}
if ($self->{'STREAM'}) {
print $out;
$out = '';
}
$$out_ref .= $out;
return;
}
###----------------------------------------------------------------###
package Template::Alloy::EvalPerlHandle;
sub TIEHANDLE {
my ($class, $out_ref) = @_;
return bless [$out_ref], $class;
}
sub PRINT {
my $self = shift;
${ $self->[0] } .= $_ for grep {defined && length} @_;
return 1;
}
###----------------------------------------------------------------###
1;
__END__
=head1 DESCRIPTION
The Template::Alloy::Play role allows for taking the AST returned by the Parse
role, and executes it directly. This is in contrast Template::Alloy::Compile
which translates the AST into perl code and then executes the perl code.
=head1 ROLE METHODS
=over 4
=item C<play_tree>
Takes the AST output of load_tree and executes it directly. It should
be passed an AST tree and an output string reference that the content will
be appended to.
my $tree = $self->load_tree('somefile');
my $out = '';
$self->play_tree($tree, \$out);
=item C<play_*>
Methods by these names are used by execute_tree to execute the parsed tree.
=back
=head1 AUTHOR
Paul Seamons <paul at seamons dot com>
=head1 LICENSE
This module may be distributed under the same terms as Perl itself.
=cut
|