#| Lightweight CSS Font Resource Manager
unit class CSS::Font::Resources:ver<0.0.9>;

use CSS::Properties::Calculator :FontWeight;
use CSS::Font;
use CSS::Font::Descriptor;
use CSS::Font::Resources::Source :FontFormat, :&guess-format;
use CSS::Font::Resources::Source::Local;
use CSS::Font::Resources::Source::Url;

use URI;
has CSS::Font:D() $.font is required;
has Str $.font-family = 'times-roman';
has $.formats = FontFormat;
has CSS::Font::Descriptor @.font-face;
has URI() $.base-url = './';



head

This is lightweight font resource manager, driven by CSS `@font-face` font descriptors.



#| Return only matching font-descriptors
method match(@font-face = @!font-face) {
    $!font.match(@font-face);
}


These are matched and ordered by preference, using the
    L<W3C Font Matching Algorithm|https://www.w3.org/TR/2018/REC-css-fonts-3-20180920/#font-matching-algorithm>.


para


#| Return sources for matching fonts
multi method sources(CSS::Font::Resources:U: Bool :$fallback = True, |c) {
    self.new(|c).sources: :$fallback;
}
multi method sources(
    CSS::Font::Resources:D:
    Bool :$fallback = True,
) {
    my CSS::Font::Resources::Source @sources;
    my @descriptors = $!font.match(@!font-face);

    for @descriptors -> CSS::Font::Descriptor $font-descriptor {

        with $font-descriptor.font-family -> $family {
            if $font-descriptor.src -> @srcs {
                for @srcs -> $src {
                    my $ref = $src[0];
                    my FontFormat $format = .[0] with $src[1];
                    given $ref.type {
                        when 'local' {
                            @sources.push: CSS::Font::Resources::Source::Local.new: :$family, :$font-descriptor, :$format;
                        }
                        when 'url' {
                            my URI() $url = $ref;
                            $format ||= guess-format($url);
                            @sources.push: CSS::Font::Resources::Source::Url.new: :$family, :$font-descriptor, :$format, :$url, :$!base-url;
                        }
                        default {
                            warn 'unknown @font-face src: ' ~ $_;
                        }
                    }
                }
            }
        }
    }

    if $fallback {
        # if none of the @font-face rules match, match the font itself
        given $!font.family.head // $!font-family -> $family {
            my CSS::Font::Descriptor $font-descriptor .= new;
            $font-descriptor.css.copy($!font.css);
            $font-descriptor.css.font-family = $family;
            $font-descriptor.setup;
            @sources.push: CSS::Font::Resources::Source::Local.new: :$family, :$font-descriptor;
        }
    }

    @sources.grep: {.format ~~ $!formats};
}


item

These matches are ordered by user preference. The fonts themselves can be fetched using the `.IO` or `.Str` or Blob methods
on the first matching font.



method source(|c --> CSS::Font::Resources::Source) handles<IO> {
    @.sources(|c).head // CSS::Font::Resources::Source;
}


root

Source

index

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|#>
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    =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>
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    =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|#>
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=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


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=para
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Resources

Description

Methods

CSS::Font::Resources v0.0.9

Authors

License

Dependencies

Test Dependencies

Provides

Documentation