<!DOCTYPE html>
<meta charset="UTF-8">
<meta charset="UTF-8">
<title>mask-position-interpolation</title>
<link rel="help" href="https://drafts.fxtf.org/css-masking-1/#the-mask-position">
<meta name="assert" content="mask-position supports animation">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/interpolation-testcommon.js"></script>

<style>
.container {
  display: inline-block;
  border: 2px solid black;
}
.parent {
  mask-position: 30px 10px;
}
.target {
  width: 120px;
  height: 120px;
  mask-position: 10px 30px;
}
</style>

<body>
<template id="target-template">
  <div class="container">
    <div class="target"></div>
  </div>
</template>
<script>
// neutral
test_interpolation({
  property: 'mask-position',
  from: neutralKeyframe,
  to: '20px 20px',
}, [
  {at: -0.25, expect: '7.5px 32.5px'},
  {at: 0, expect: '10px 30px'},
  {at: 0.25, expect: '12.5px 27.5px'},
  {at: 0.5, expect: '15px 25px'},
  {at: 0.75, expect: '17.5px 22.5px'},
  {at: 1, expect: '20px 20px'},
  {at: 1.25, expect: '22.5px 17.5px'},
]);

// initial
test_interpolation({
  property: 'mask-position',
  from: 'initial',
  to: '20px 20px',
}, [
  {at: -0.25, expect: 'calc(0% - 5px) calc(0% - 5px)'},
  {at: 0, expect: '0% 0%'},
  {at: 0.25, expect: 'calc(0% + 5px) calc(0% + 5px)'},
  {at: 0.5, expect: 'calc(0% + 10px) calc(0% + 10px)'},
  {at: 0.75, expect: 'calc(0% + 15px) calc(0% + 15px)'},
  {at: 1, expect: 'calc(0% + 20px) calc(0% + 20px)'},
  {at: 1.25, expect:'calc(0% + 25px) calc(0% + 25px)'},
]);

// inherit
test_interpolation({
  property: 'mask-position',
  from: 'inherit',
  to: '20px 20px',
}, [
  {at: -0.25, expect: '32.5px 7.5px'},
  {at: 0, expect: '30px 10px'},
  {at: 0.25, expect: '27.5px 12.5px'},
  {at: 0.5, expect: '25px 15px'},
  {at: 0.75, expect: '22.5px 17.5px'},
  {at: 1, expect: '20px 20px'},
  {at: 1.25, expect: '17.5px 22.5px'},
]);

// unset
test_interpolation({
  property: 'mask-position',
  from: 'unset',
  to: '20px 20px',
}, [
  {at: -0.25, expect: 'calc(0% - 5px) calc(0% - 5px)'},
  {at: 0, expect: '0% 0%'},
  {at: 0.25, expect: 'calc(0% + 5px) calc(0% + 5px)'},
  {at: 0.5, expect: 'calc(0% + 10px) calc(0% + 10px)'},
  {at: 0.75, expect: 'calc(0% + 15px) calc(0% + 15px)'},
  {at: 1, expect: 'calc(0% + 20px) calc(0% + 20px)'},
  {at: 1.25, expect:'calc(0% + 25px) calc(0% + 25px)'},
]);

// Test equal number of position values as background images.
test_interpolation({
  property: 'mask-position',
  from: '0px 0px, 0px 0px, 0px 0px, 0px 0px',
  to: '80px 80px, 80px 80px, 80px 80px, 80px 80px',
}, [
  {at: -0.25, expect: '-20px -20px, -20px -20px, -20px -20px, -20px -20px'},
  {at: 0, expect:     '  0px   0px,   0px   0px,   0px   0px,   0px   0px'},
  {at: 0.25, expect:  ' 20px  20px,  20px  20px,  20px  20px,  20px  20px'},
  {at: 0.5, expect:   ' 40px  40px,  40px  40px,  40px  40px,  40px  40px'},
  {at: 0.75, expect:  ' 60px  60px,  60px  60px,  60px  60px,  60px  60px'},
  {at: 1, expect:     ' 80px  80px,  80px  80px,  80px  80px,  80px  80px'},
  {at: 1.25, expect:  '100px 100px, 100px 100px, 100px 100px, 100px 100px'},
]);

// Test single position value repeated over background images.
test_interpolation({
  property: 'mask-position',
  from: 'top 0px left 0px',
  to: 'left 80px top 80px',
}, [
  {at: -0.25, expect: '-20px -20px'},
  {at: 0, expect:     '  0px   0px'},
  {at: 0.25, expect:  ' 20px  20px'},
  {at: 0.5, expect:   ' 40px  40px'},
  {at: 0.75, expect:  ' 60px  60px'},
  {at: 1, expect:     ' 80px  80px'},
  {at: 1.25, expect:  '100px 100px'},
]);

// Test mismatched numbers of position values.
test_interpolation({
  property: 'mask-position',
  from: '0px 0px, 80px 0px',
  to: '40px 40px, 80px 80px, 0px 80px',
}, [
  {at: -0.25, expect:
    '-10px -10px, 80px -20px, 0px -20px, 90px -10px, -20px -20px, 100px -20px'},
  {at: 0, expect:
    '  0px   0px, 80px   0px, 0px   0px, 80px   0px,   0px   0px,  80px   0px'},
  {at: 0.25, expect:
    ' 10px  10px, 80px  20px, 0px  20px, 70px  10px,  20px  20px,  60px  20px'},
  {at: 0.5, expect:
    ' 20px  20px, 80px  40px, 0px  40px, 60px  20px,  40px  40px,  40px  40px'},
  {at: 0.75, expect:
    ' 30px  30px, 80px  60px, 0px  60px, 50px  30px,  60px  60px,  20px  60px'},
  {at: 1, expect:
    ' 40px  40px, 80px  80px, 0px  80px, 40px  40px,  80px  80px,   0px  80px'},
  {at: 1.25, expect:
    ' 50px  50px, 80px 100px, 0px 100px, 30px  50px, 100px 100px, -20px 100px'},
]);
</script>
</body>
