<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Pseudo-Elements Test: Supported properties in ::marker animations</title>
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#marker-pseudo">
<link rel="help" href="https://drafts.csswg.org/css-animations-1/#keyframes">
<link rel="help" href="https://drafts.csswg.org/css-transitions-1/#transitions">
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<meta name="assert" content="This test checks ::marker supports animations and transitions, but only for the properties that apply to ::marker." />
<style id="style"></style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<ul>
  <li id="target">target</li>
</ul>
<script>
const interpolationTests = [
  // ::marker supports all font properties.
  {
    property: "font",
    from: "oblique normal 100 ultra-condensed 5px / 20px serif",
    to: "italic small-caps 900 ultra-expanded 25px / 50px Ahem",
    midPoint: ["italic small-caps 500 expanded 15px Ahem", "italic small-caps 500 expanded 15px/normal Ahem"],
  },
  {
    property: "font-family",
    from: "serif",
    to: "Ahem",
    midPoint: "Ahem",
  },
  {
    property: "font-feature-settings",
    from: "'c2sc'",
    to: "'smcp'",
    midPoint: "\"smcp\"",
  },
  {
    property: "font-kerning",
    from: "normal",
    to: "none",
    midPoint: "none",
  },
  {
    property: "font-size",
    from: "5px",
    to: "25px",
    midPoint: "15px",
  },
  {
    property: "font-size-adjust",
    from: "1",
    to: "3",
    midPoint: "2",
  },
  {
    property: "font-stretch",
    from: "ultra-condensed",
    to: "ultra-expanded",
    midPoint: ["expanded", "125%"],
  },
  {
    property: "font-style",
    from: "oblique",
    to: "italic",
    midPoint: "italic",
  },
  {
    property: "font-synthesis",
    from: "weight",
    to: "none",
    midPoint: "none",
  },
  {
    property: "font-variant",
    from: "unicase",
    to: "small-caps",
    midPoint: "small-caps",
  },
  {
    property: "font-variant-caps",
    from: "unicase",
    to: "small-caps",
    midPoint: "small-caps",
  },
  {
    property: "font-variant-east-asian",
    from: "proportional-width",
    to: "full-width",
    midPoint: "full-width",
  },
  {
    property: "font-variant-ligatures",
    from: "no-historical-ligatures",
    to: "historical-ligatures",
    midPoint: "historical-ligatures",
  },
  {
    property: "font-variant-numeric",
    from: "ordinal",
    to: "slashed-zero",
    midPoint: "slashed-zero",
  },
  {
    property: "font-variant-position",
    from: "super",
    to: "sub",
    midPoint: "sub",
  },
  {
    property: "font-weight",
    from: "100",
    to: "900",
    midPoint: "500",
  },

  // ::marker supports `white-space`
  {
    property: "white-space",
    from: "pre-line",
    to: "nowrap",
    midPoint: "nowrap",
  },

  // ::marker supports `color`
  {
    property: "color",
    from: "rgb(0, 100, 200)",
    to: "rgb(100, 200, 0)",
    midPoint: "rgb(50, 150, 100)",
  },

  // ::marker supports `text-combine-upright`, `unicode-bidi` and `direction`,
  // but they are not animatable.
  {
    property: "text-combine-upright",
    from: "all",
    to: "all",
    midPoint: null,
  },
  {
    property: "unicode-bidi",
    from: "embed",
    to: "plaintext",
    midPoint: null,
  },
  {
    property: "direction",
    from: "rtl",
    to: "rtl",
    midPoint: null,
  },

  // ::marker supports `content`
  {
    property: "content",
    from: "'foo'",
    to: "'bar'",
    midPoint: "\"bar\"",
  },

  // ::marker does NOT support layout properties
  {
    property: "display",
    from: "flex",
    to: "none",
    midPoint: ["block", "inline", "inline-block"],
  },
  {
    property: "position",
    from: "fixed",
    to: "absolute",
    midPoint: "static",
  },
  {
    property: "float",
    from: "left",
    to: "right",
    midPoint: "none",
  },

  // ::marker does NOT support list properties despite being affected by them,
  // they apply to the list item instead.
  {
    property: "list-style",
    from: "inside url('foo') square",
    to: "inside url('bar') decimal",
    midPoint: "outside none disc",
  },
  {
    property: "list-style-image",
    from: "url('foo')",
    to: "url('bar')",
    midPoint: "none",
  },
  {
    property: "list-style-position",
    from: "inside",
    to: "inside",
    midPoint: "outside",
  },
  {
    property: "list-style-type",
    from: "square",
    to: "decimal",
    midPoint: "disc",
  },

  // ::marker does NOT support `line-height` because, despite being a
  // longhand of `font`, it's not a font property.
  {
    property: "line-height",
    from: "20px",
    to: "50px",
    midPoint: "normal",
  },
];

const target = document.getElementById("target");
const styleElement = document.getElementById("style");
const markerStyle = getComputedStyle(target, "::marker");

function check({property, from, to, midPoint}) {
  assert_true(property in markerStyle, property + " doesn't seem to be supported in the computed style");
  assert_true(CSS.supports(property, from), `'${from}' is a supported value for ${property}.`);
  assert_true(CSS.supports(property, to), `'${to}' is a supported value for ${property}.`);
  const computed = markerStyle.getPropertyValue(property);
  if (Array.isArray(midPoint)) {
    assert_in_array(computed, midPoint);
  } else {
    assert_equals(computed, midPoint);
  }
}

function testAnimations(interpolationTests) {
  styleElement.textContent = `
    ::marker {
      animation: anim 2s -1s paused linear;
    }
    @keyframes anim {
      from {}
      to {}
    }
  `;
  const keyframes = styleElement.sheet.cssRules[1];
  const fromStyle = keyframes.cssRules[0].style;
  const toStyle = keyframes.cssRules[1].style;
  for (let {property, from, to, midPoint} of interpolationTests) {
    fromStyle.cssText = "";
    toStyle.cssText = "";
    if (midPoint == null) {
      midPoint = markerStyle.getPropertyValue(property);
    }
    fromStyle.setProperty(property, from);
    toStyle.setProperty(property, to);
    test(() => {
      check({property, from, to, midPoint});
    }, `Animation of ${property} in ::marker`);
  }
}

function testTransitions(interpolationTests) {
  styleElement.textContent = `
    .transition::marker {
      transition: all 2s -1s linear;
    }
    .from::marker {}
    .to::marker {}
  `;
  const fromStyle = styleElement.sheet.cssRules[1].style;
  const toStyle = styleElement.sheet.cssRules[2].style;
  for (let {property, from, to, midPoint} of interpolationTests) {
    fromStyle.cssText = "";
    toStyle.cssText = "";
    if (midPoint == null) {
      midPoint = to;
    }
    fromStyle.setProperty(property, from);
    toStyle.setProperty(property, to);
    target.className = "from";
    markerStyle.width;
    target.classList.add("transition");
    markerStyle.width;
    target.classList.add("to");
    test(() => {
      check({property, from, to, midPoint});
    }, `Transition of ${property} in ::marker`);
  }
}

testAnimations(interpolationTests);
testTransitions(interpolationTests);
</script>