#| Selector component of rule-sets
unit class CSS::Selectors;

use CSS::Selector::To::XPath;
use CSS::Module;
use CSS::Module::CSS3;

has %.ast;
has Version $!specificity;
has CSS::Selector::To::XPath $!to-xml .= new;

submethod TWEAK {
    for <active focus link hover visited> {
        $!to-xml.pseudo-classes{$_} = "link-pseudo('$_', .)";
    }
}

multi method parse(CSS::Selectors:U: Str $selectors!, :$module = CSS::Module::CSS3.module, |c --> CSS::Selectors) {
    my $actions = $module.actions.new;
    my $p := $module.parse($selectors, :rule<selectors>, :$actions)
        or die "unable to parse CSS selectors: $selectors";
    note $_ for $actions.warnings;
    my $ast = $p.ast;
    self.new: :$ast, |c;
}

class Specificity {
    has UInt $!id     = 0;
    has UInt $!class  = 0;
    has UInt $!type   = 0;

    multi method calc(:simple-selector($_)!) {
        $.calc(|$_) for .list;
    }

    multi method calc(:selector($_)!) {
        $.calc(|$_) for .list;
    }

    multi method calc(:selectors($_)!) {
        $.calc(|$_) for .list;
        Version.new: ($!id, $!class, $!type).join: '.';
    }

    multi method calc(:qname($_)!) {
        $!type++ unless .<element-name> ~~ '*';
    }
    multi method calc(:attrib($)!)       { $!class++ }
    multi method calc(:class($)!)        { $!class++ }
    multi method calc(:pseudo-class($)!) { $!class++ }
    multi method calc(:pseudo-elem($)!)  { $!class++ }
    multi method calc(:pseudo-func($_)!) {
        with .<expr> {
            $.calc(|$_) for .list;
        }
    }
    multi method calc(:id($)!)             { $!id++ }
    multi method calc(:op($)!)             {}

    multi method calc(*%frag) is default {
        warn "ignoring {%frag.raku}";
    }

}



head


#| Returns selector specificity in the form v<id>.<class>.<type>
method specificity returns Version {
    $!specificity //= do {
        my Specificity $spec .= new;
        $spec.calc: |%!ast;
    }
}

#| Returns an XPath translation of the selector
method xpath returns Str {
    $!to-xml.xpath: %!ast;
}

multi method COERCE(Str $selectors) { self.parse: $selectors }


root

Stylesheet

Ruleset

React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=end React


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
This website uses cookies for analytics.
=end React


Selectors

Methods

CSS::Stylesheet v0.1.0

Authors

License

Dependencies

Test Dependencies

Provides

Documentation