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<title>CSS Masking Module Level 1: parsing mask with valid values</title>
<link rel="help" href="https://www.w3.org/TR/css-masking-1/#the-mask">
<meta name="assert" content="mask supports the full '<mask-layer>#' grammar.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<script src="/css/support/shorthand-testcommon.js"></script>
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<script>
// <mask-layer> = <mask-reference> || <position> [ / <bg-size> ]? || <repeat-style> ||
// <geometry-box> || [ <geometry-box> | no-clip ] || <compositing-operator> || <masking-mode>

// <mask-reference> = none | <image> | <mask-source>
test_valid_value('mask', 'none');
test_valid_value('mask', 'linear-gradient(to left bottom, red, blue)');
test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) luminance');
test_valid_value('mask', 'url("https://{{host}}/")');

// <position> [ / <bg-size> ]?
test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) 1px 2px');
test_valid_value('mask', 'url("https://{{host}}/") 1px 2px / contain');

// <repeat-style> = repeat-x | repeat-y | [repeat | space | round | no-repeat]{1,2}
test_valid_value('mask', 'repeat-y');

// <geometry-box> = <shape-box> | fill-box | stroke-box | view-box
// <shape-box> = <box> | margin-box
// <box> = border-box | padding-box | content-box
test_valid_value('mask', 'border-box', 'none');
test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) padding-box');
test_valid_value('mask', 'content-box');
test_valid_value('mask', 'margin-box');
test_valid_value('mask', 'url("https://{{host}}/") fill-box');
test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) stroke-box');
test_valid_value('mask', 'view-box');

// [ <geometry-box> | no-clip ]
test_valid_value('mask', 'no-clip');

// <compositing-operator> = add | subtract | intersect | exclude
test_valid_value('mask', 'url("https://{{host}}/") add', 'url("https://{{host}}/")');
test_valid_value('mask', 'subtract');
test_valid_value('mask', 'url("https://{{host}}/") intersect');
test_valid_value('mask', 'linear-gradient(to left bottom, red, blue) exclude');

// <masking-mode> = alpha | luminance | auto
test_valid_value('mask', 'alpha');
test_valid_value('mask', 'url("https://{{host}}/") alpha');

// <mask-layer> = <mask-reference> || <position> [ / <bg-size> ]? || <repeat-style> ||
// <geometry-box> || [ <geometry-box> | no-clip ] || <compositing-operator> || <masking-mode>
test_valid_value('mask', 'intersect no-clip space round 1px 2px / contain stroke-box linear-gradient(to left bottom, red, blue) luminance', 'linear-gradient(to left bottom, red, blue) luminance 1px 2px / contain space round stroke-box no-clip intersect');
test_valid_value('mask', 'intersect no-clip space round 1px 2px / contain view-box, stroke-box linear-gradient(to left bottom, red, blue) luminance', '1px 2px / contain space round view-box no-clip intersect, linear-gradient(to left bottom, red, blue) luminance stroke-box');

// Earlier versions of the mask shorthand always required a <mask-reference>.
// To avoid unnecessarily losing test coverage, keep one of the test cases from back then.
test_valid_value('mask', 'none alpha', 'alpha');

test_shorthand_value('mask', 'none', {
    'mask-image': 'none',
    'mask-position': '0% 0%',
    'mask-size': 'auto',
    'mask-repeat': 'repeat',
    'mask-origin': 'border-box',
    'mask-clip': 'border-box',
    'mask-composite': 'add',
    'mask-mode': 'match-source',
})
test_shorthand_value('mask', 'none, linear-gradient(to left bottom, red, blue) padding-box', {
    'mask-image': 'none, linear-gradient(to left bottom, red, blue)',
    'mask-position': '0% 0%, 0% 0%',
    'mask-size': 'auto, auto',
    'mask-repeat': 'repeat, repeat',
    'mask-origin': 'border-box, padding-box',
    'mask-clip': 'border-box, padding-box',
    'mask-composite': 'add, add',
    'mask-mode': 'match-source, match-source',
})

</script>
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