Commit | Line | Data |
456a815d |
1 | package HTML::Zoom::SelectorParser; |
2 | |
3 | use strict; |
4 | use warnings FATAL => 'all'; |
6d0f20a6 |
5 | use base qw(HTML::Zoom::SubObject); |
456a815d |
6 | use Carp qw(confess); |
7 | |
8 | my $sel_char = '-\w_'; |
9 | my $sel_re = qr/([$sel_char]+)/; |
10 | |
11 | sub new { bless({}, shift) } |
12 | |
13 | sub _raw_parse_simple_selector { |
14 | for ($_[1]) { # same pos() as outside |
15 | |
16 | # '*' - match anything |
17 | |
18 | /\G\*/gc and |
19 | return sub { 1 }; |
20 | |
04d71924 |
21 | # 'el[attr~="foo"] |
22 | |
23 | /\G$sel_re\[$sel_re~="$sel_re"\]/gc and |
24 | return do { |
25 | my $name = $1; |
26 | my $attr = $2; |
27 | my $val = $3; |
28 | sub { |
29 | if ( |
30 | $_[0]->{name} && $_[0]->{name} eq $name and |
31 | $_[0]->{attrs}{$attr} |
32 | ) { |
33 | my %vals = map { $_ => 1 } split /\s+/, $_[0]->{attrs}{$attr}; |
34 | return $vals{$val} |
35 | } |
36 | return undef |
37 | } |
38 | }; |
39 | |
3b8c9d7d |
40 | # 'el[attr="foo"] |
41 | |
42 | /\G$sel_re\[$sel_re="$sel_re"\]/gc and |
43 | return do { |
44 | my $name = $1; |
45 | my $attr = $2; |
46 | my $val = $3; |
47 | sub { |
48 | $_[0]->{name} && $_[0]->{name} eq $name and |
49 | $_[0]->{attrs}{$attr} && $_[0]->{attrs}{$attr} eq $val |
50 | } |
51 | }; |
52 | |
456a815d |
53 | # 'element' - match on tag name |
54 | |
55 | /\G$sel_re/gc and |
56 | return do { |
57 | my $name = $1; |
58 | sub { $_[0]->{name} && $_[0]->{name} eq $name } |
59 | }; |
60 | |
61 | # '#id' - match on id attribute |
62 | |
63 | /\G#$sel_re/gc and |
64 | return do { |
65 | my $id = $1; |
66 | sub { $_[0]->{attrs}{id} && $_[0]->{attrs}{id} eq $id } |
67 | }; |
68 | |
69 | # '.class1.class2' - match on intersection of classes |
70 | |
71 | /\G((?:\.$sel_re)+)/gc and |
72 | return do { |
73 | my $cls = $1; $cls =~ s/^\.//; |
74 | my @cl = split(/\./, $cls); |
75 | sub { |
76 | $_[0]->{attrs}{class} |
6d0f20a6 |
77 | && !grep $_[0]->{attrs}{class} !~ /(^|\s+)$_($|\s+)/, @cl |
456a815d |
78 | } |
79 | }; |
80 | |
7871f2ff |
81 | # 'el.class1' - element + class |
82 | |
83 | /\G$sel_re\.$sel_re/gc and |
84 | return do { |
85 | my $cls = $1; |
86 | my $name = $2; |
87 | sub { |
88 | $_[0]->{name} && $_[0]->{name} eq $name and |
89 | $_[0]->{attrs}{class} && $_[0]->{attrs}{class} eq $cls |
90 | } |
91 | }; |
92 | |
32ea0d1e |
93 | # 'el#id' - element + id |
94 | |
95 | /\G$sel_re#$sel_re/gc and |
96 | return do { |
97 | my $id = $1; |
98 | my $name = $2; |
99 | sub { |
100 | $_[0]->{name} && $_[0]->{name} eq $name and |
101 | $_[0]->{attrs}{id} && $_[0]->{attrs}{id} eq $id |
102 | } |
103 | }; |
104 | |
456a815d |
105 | confess "Couldn't parse $_ as starting with simple selector"; |
106 | } |
107 | } |
108 | |
109 | sub parse_selector { |
110 | my $self = $_[0]; |
111 | my $sel = $_[1]; # my pos() only please |
112 | die "No selector provided" unless $sel; |
113 | local *_; |
114 | for ($sel) { |
115 | my @sub; |
116 | PARSE: { do { |
117 | push(@sub, $self->_raw_parse_simple_selector($_)); |
118 | last PARSE if (pos == length); |
119 | /\G\s*,\s*/gc or confess "Selectors not comma separated"; |
120 | } until (pos == length) }; |
121 | return $sub[0] if (@sub == 1); |
122 | return sub { |
123 | foreach my $inner (@sub) { |
124 | if (my $r = $inner->(@_)) { return $r } |
125 | } |
126 | }; |
127 | } |
7871f2ff |
128 | } |
129 | |
456a815d |
130 | |
131 | 1; |