$font-folder: "../../fonts" !default;
$use-woff2: true !default;
$use-woff: true !default;
$use-ttf: true !default;

@function generate-src($family, $family-suffix) {
    $src: null;
    @if $use-woff2 {
        $src: append($src, url('#{$font-folder}/KaTeX_#{$family}-#{$family-suffix}.woff2') format('woff2'), comma);
    }
    @if $use-woff {
        $src: append($src, url('#{$font-folder}/KaTeX_#{$family}-#{$family-suffix}.woff') format('woff'), comma);
    }
    @if $use-ttf {
        $src: append($src, url('#{$font-folder}/KaTeX_#{$family}-#{$family-suffix}.ttf') format('truetype'), comma);
    }

    @return $src;
}

@function generate-suffix($weight, $style) {
    $suffix: null;

    @if $weight == normal and $style == normal {
        $suffix: 'Regular';
    }
    @if $weight == normal and $style == italic {
        $suffix: 'Italic';
    }
    @if $weight == bold and $style == normal {
        $suffix: 'Bold';
    }
    @if $weight == bold and $style == italic {
        $suffix: 'BoldItalic';
    }

    @return $suffix;
}

@mixin font-face($family, $weight, $style) {
    $suffix: generate-suffix($weight, $style);
    $src: generate-src($family, $suffix);

    @font-face {
        font-family: 'KaTeX_#{$family}';
        src: $src;
        font-weight: $weight;
        font-style: $style;
    }
}

@include font-face('AMS', normal, normal);
@include font-face('Caligraphic', bold, normal);
@include font-face('Caligraphic', normal, normal);
@include font-face('Fraktur', bold, normal);
@include font-face('Fraktur', normal, normal);
@include font-face('Main', bold, normal);
@include font-face('Main', bold, italic);
@include font-face('Main', normal, italic);
@include font-face('Main', normal, normal);
@include font-face('Math', bold, italic);
@include font-face('Math', normal, italic);
@include font-face('SansSerif', bold, normal);
@include font-face('SansSerif', normal, italic);
@include font-face('SansSerif', normal, normal);
@include font-face('Script', normal, normal);
@include font-face('Size1', normal, normal);
@include font-face('Size2', normal, normal);
@include font-face('Size3', normal, normal);
@include font-face('Size4', normal, normal);
@include font-face('Typewriter', normal, normal);