Commit | Line | Data |
e1b4b35c |
1 | package HTML::String::Value; |
2 | |
3 | use strictures 1; |
4 | use Safe::Isa; |
5 | use Data::Munge; |
6 | |
7 | sub op_factory { |
8 | my ($op) = @_; |
9 | |
10 | return eval q|sub { |
11 | my ($self, $str) = @_; |
12 | |
13 | if ( $str->$_isa(__PACKAGE__) ) { |
14 | return $self->unescaped_string | . $op . q| $str->unescaped_string; |
15 | } |
16 | else { |
17 | return $self->unescaped_string | . $op . q| $str; |
18 | } |
19 | }|; |
20 | } |
21 | |
22 | use overload |
23 | '""' => 'escaped_string', |
24 | '.' => 'dot', |
25 | '.=' => 'dot_equals', |
26 | |
27 | 'cmp' => op_factory('cmp'), |
28 | 'eq' => op_factory('eq'), |
29 | '<=>' => op_factory('<=>'), |
30 | '==' => op_factory('=='), |
31 | '%' => op_factory('%'), |
32 | '+' => op_factory('+'), |
33 | '-' => op_factory('-'), |
34 | '*' => op_factory('*'), |
35 | '/' => op_factory('/'), |
36 | '**' => op_factory('**'), |
37 | '>>' => op_factory('>>'), |
38 | '<<' => op_factory('<<'), |
39 | |
40 | fallback => 1, |
41 | ; |
42 | |
43 | sub new { |
44 | my ($class, @raw_parts) = @_; |
45 | |
46 | my @parts = map { ref($_) eq 'ARRAY' ? $_ : [$_] } @raw_parts; |
47 | |
48 | my $self = bless { parts => \@parts }, $class; |
49 | |
50 | return $self; |
51 | } |
52 | |
53 | sub escaped_string { |
54 | my $self = shift; |
55 | |
56 | return join '', map +( |
57 | $_->[1] |
58 | ? byval { |
59 | s/&/&/g; |
60 | s/</</g; |
61 | s/>/>/g; |
62 | s/"/"/g; |
63 | } $_->[0] |
64 | : $_->[0] |
65 | ), @{$self->{parts}}; |
66 | } |
67 | |
68 | sub unescaped_string { |
69 | my $self = shift; |
70 | |
71 | return join '', map $_->[0], @{$self->{parts}}; |
72 | } |
73 | |
74 | sub dot { |
75 | my ($self, $str, $prefix) = @_; |
76 | |
77 | return $self unless $str; |
78 | |
79 | my @parts = @{$self->{parts}}; |
80 | |
81 | my @new_parts = ( |
82 | $str->$_isa(__PACKAGE__) |
83 | ? @{$str->{parts}} |
84 | : [ $str, 1 ] |
85 | ); |
86 | |
87 | if ( $prefix ) { |
88 | unshift @parts, @new_parts; |
89 | } else { |
90 | push @parts, @new_parts; |
91 | } |
92 | |
93 | return ref($self)->new(@parts); |
94 | } |
95 | |
96 | sub dot_equals { |
97 | my ($self, $str, $prefix) = @_; |
98 | |
99 | return $self unless $str; |
100 | |
101 | my @new_parts = ( |
102 | $str->$_isa(__PACKAGE__) |
103 | ? @{$str->{parts}} |
104 | : [ $str, 1 ] |
105 | ); |
106 | |
107 | push @{$self->{parts}}, @new_parts; |
108 | |
109 | return $self; |
110 | } |
111 | |
112 | 1; |