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<!doctype html>
<meta charset=utf-8>
<title>Serialization of basic shapes</title>
<link rel="help" href="https://drafts.csswg.org/css-shapes/#basic-shape-serialization"/>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
function checkEquals(input, expected) {
test(function() {
let div = document.createElement('div');
div.style.clipPath = input;
let serialized = div.style.clipPath;
assert_equals(serialized, expected, input);
});
}
// Keywords get replaced by percentages in 2-value form
checkEquals("circle(at left bottom)", "circle(at 0% 100%)");
checkEquals("circle(at bottom left)", "circle(at 0% 100%)");
checkEquals("circle(at right calc(10% + 5px))",
"circle(at 100% calc(10% + 5px))");
checkEquals("ellipse(at left bottom)", "ellipse(at 0% 100%)");
checkEquals("ellipse(at bottom left)", "ellipse(at 0% 100%)");
checkEquals("ellipse(at right calc(10% + 5px))",
"ellipse(at 100% calc(10% + 5px))");
// Only 2 or 4 value form allowed
checkEquals("circle()", "circle()");
checkEquals("circle(0px)", "circle(0px)");
checkEquals("circle(closest-side)", "circle()");
checkEquals("circle(farthest-side)",
"circle(farthest-side)");
checkEquals("ellipse()", "ellipse()");
checkEquals("ellipse(closest-side farthest-side)",
"ellipse(closest-side farthest-side)");
checkEquals("circle(at top 0% right 5px)", "circle(at calc(100% - 5px) 0%)");
checkEquals("ellipse(at top 0% right 10px)", "ellipse(at calc(100% - 10px) 0%)");
// Remove defaults like closest-side
checkEquals("circle(closest-side at center)",
"circle(at 50% 50%)");
checkEquals("ellipse(closest-side closest-side at center)",
"ellipse(at 50% 50%)");
// don't remove non defaults
checkEquals("circle(farthest-side at center)",
"circle(farthest-side at 50% 50%)");
checkEquals("circle(10px at center)",
"circle(10px at 50% 50%)");
checkEquals("ellipse(farthest-side 10px at center)",
"ellipse(farthest-side 10px at 50% 50%)");
// Ellipse can have 0 radii or two, not one. We cannot
// eliminate a single closest-side if the other is different
checkEquals("ellipse(closest-side farthest-side at 50% 50%)",
"ellipse(closest-side farthest-side at 50% 50%)");
checkEquals("ellipse(closest-side 10% at 50% 50%)",
"ellipse(closest-side 10% at 50% 50%)");
// Transform to <length-percentage>.
checkEquals("circle(at right 5px bottom 10px)",
"circle(at calc(100% - 5px) calc(100% - 10px))");
checkEquals("ellipse(at right 5px bottom 10px)",
"ellipse(at calc(100% - 5px) calc(100% - 10px))");
// Don't convert zero lengths to 0%
checkEquals("circle(at right 5% top 0px)", "circle(at calc(95%) 0px)");
checkEquals("ellipse(at right 5% top 0px)", "ellipse(at calc(95%) 0px)");
// Transform calcs
checkEquals("circle(at right calc(10% + 5px) bottom calc(10% + 5px))",
"circle(at calc(90% - 5px) calc(90% - 5px))");
checkEquals("ellipse(at right calc(10% + 5px) bottom calc(10% + 5px))",
"ellipse(at calc(90% - 5px) calc(90% - 5px))");
</script>
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