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HTML: alpha and colorspace attribute
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Context: whatwg/html#10456.
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@annevk
annevk authored Oct 21, 2024
1 parent 0f0b4b0 commit 05ae498
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29 changes: 29 additions & 0 deletions html/semantics/forms/the-input-element/color-attributes.window.js
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test(() => {
const input = document.createElement("input");
input.type = "color";
input.setAttribute("alpha", "blah");
assert_equals(input.getAttribute("alpha"), "blah");
assert_true(input.alpha);
input.alpha = false;
assert_false(input.hasAttribute("alpha"));
input.alpha = "blah";
assert_true(input.alpha);
assert_equals(input.getAttribute("alpha"), "");
}, "<input type=color>: alpha attribute");

test(() => {
const input = document.createElement("input");
input.type = "color";
input.setAttribute("colorspace", "blah");
assert_equals(input.getAttribute("colorspace"), "blah");
assert_equals(input.colorSpace, "limited-srgb");
input.colorSpace = null;
assert_equals(input.getAttribute("colorspace"), "null");
assert_equals(input.colorSpace, "limited-srgb");
input.colorSpace = "DISPLAY-P3";
assert_equals(input.getAttribute("colorspace"), "DISPLAY-P3");
assert_equals(input.colorSpace, "display-p3");
input.colorSpace = "DıSPLAY-P3";
assert_equals(input.getAttribute("colorspace"), "DıSPLAY-P3");
assert_equals(input.colorSpace, "limited-srgb");
}, "<input type=color>: colorspace attribute");
1 change: 1 addition & 0 deletions ...antics/forms/the-input-element/color.html → ...ms/the-input-element/color.tentative.html
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<!DOCTYPE html>
<!-- This test can be removed once all browsers support the alpha and colorspace attributes. -->
<meta charset=utf-8>
<title>Form input type=color</title>
<link rel="author" title="Denis Ah-Kang" href="mailto:denis@w3.org">
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254 changes: 254 additions & 0 deletions html/semantics/forms/the-input-element/color.window.js
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// META: script=/css/support/color-testcommon.js

// While assert_equals is fine for hex, it's not for hexalpha, p3, and p3alpha. We use the default
// epsilon of 0.0001.
const assert_colors = set_up_fuzzy_color_test();

[
{
value: "",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "#ffffff",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1)"
},
{
value: "#ffffff08",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1 / 0.031373)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1 / 0.031373)"
},
{
value: "#FFFFFF",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1)"
},
{
value: "#0F0F0F",
hex: "#0f0f0f",
hexalpha: "color(srgb 0.058824 0.058824 0.058824)",
p3: "color(display-p3 0.058824 0.058824 0.058824)",
p3alpha: "color(display-p3 0.058824 0.058824 0.058824)"
},
{
value: "#fff",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1)"
},
{
value: "fffffff",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "#gggggg",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "foobar",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "#ffffff\u0000",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "#ffffff;",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: " #ffffff",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1)"
},
{
value: "#ffffff ",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1)"
},
{
value: " #ffffff ",
hex: "#ffffff",
hexalpha: "color(srgb 1 1 1)",
p3: "color(display-p3 1 1 1)",
p3alpha: "color(display-p3 1 1 1)"
},
{
value: "crimson",
hex: "#dc143c",
hexalpha: "color(srgb 0.862745 0.078431 0.235294)",
p3: "color(display-p3 0.791711 0.191507 0.257367)",
p3alpha: "color(display-p3 0.791711 0.191507 0.257367)"
},
{
value: "bisque",
hex: "#ffe4c4",
hexalpha: "color(srgb 1 0.894118 0.768627)",
p3: "color(display-p3 0.982297 0.8979 0.783276)",
p3alpha: "color(display-p3 0.982297 0.8979 0.783276)"
},
{
value: "currentColor",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "transparent",
hex: "#000000",
hexalpha: "color(srgb 0 0 0 / 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0 / 0)"
},
{
value: "inherit",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
},
{
value: "rgb(1,1,1)",
hex: "#010101",
hexalpha: "color(srgb 0.003922 0.003922 0.003922)",
p3: "color(display-p3 0.003922 0.003922 0.003922)",
p3alpha: "color(display-p3 0.003922 0.003922 0.003922)"
},
{
value: "rgb(1,1,1,1)",
hex: "#010101",
hexalpha: "color(srgb 0.003922 0.003922 0.003922)",
p3: "color(display-p3 0.003922 0.003922 0.003922)",
p3alpha: "color(display-p3 0.003922 0.003922 0.003922)"
},
{
value: "rgb(1,1,1,0.5)",
hex: "#010101",
hexalpha: "color(srgb 0.003922 0.003922 0.003922 / 0.501961)",
p3: "color(display-p3 0.003922 0.003922 0.003922)",
p3alpha: "color(display-p3 0.003922 0.003922 0.003922 / 0.501961)"
},
{
value: "#FFFFF\u1F4A9",
hex: "#000000",
hexalpha: "color(srgb 0 0 0)",
p3: "color(display-p3 0 0 0)",
p3alpha: "color(display-p3 0 0 0)"
}
].forEach(({ value, hex, hexalpha, p3, p3alpha }) => {
["limited-srgb", "display-p3"].forEach(colorSpace => {
[false, true].forEach(alpha => {
const nameValue = value === "" ? "the empty string" : value === undefined ? "no value" : "'" + value + "'";
test(() => {
const input = document.createElement("input");
input.type = "color";
if (value !== undefined) {
input.setAttribute("value", value);
}
assert_equals(input.value, hex, "value is hex");
input.colorSpace = colorSpace;
assert_equals(input.colorSpace, colorSpace, "color space");
if (colorSpace === "limited-srgb") {
assert_equals(input.value, hex, "value is hex");
} else {
assert_colors(input.value, p3);
}
input.alpha = alpha;
assert_equals(input.alpha, alpha, "alpha");
if (colorSpace === "limited-srgb" && !alpha) {
assert_equals(input.value, hex, "value is hex");
} else if (colorSpace === "limited-srgb" && alpha) {
assert_colors(input.value, hexalpha);
} else if (colorSpace === "display-p3" && !alpha) {
assert_colors(input.value, p3);
} else {
assert_colors(input.value, p3alpha);
}
}, `Testing ${nameValue} with color space '${colorSpace}' and ${alpha ? 'with' : ' without'} alpha (setAttribute("value"))`);

test(() => {
const input = document.createElement("input");
input.type = "color";
// In this test we set alpha before we set value to avoid the value sanitization algorithm
// taking away the alpha channel from the input.
input.alpha = true;
if (value !== undefined) {
input.value = value;
}
assert_colors(input.value, hexalpha);
input.colorSpace = colorSpace;
assert_equals(input.colorSpace, colorSpace, "color space");
if (colorSpace === "limited-srgb") {
assert_colors(input.value, hexalpha);
} else {
assert_colors(input.value, p3alpha);
}
input.alpha = alpha;
assert_equals(input.alpha, alpha, "alpha");
if (colorSpace === "limited-srgb" && !alpha) {
assert_equals(input.value, hex, "value is hex");
} else if (colorSpace === "limited-srgb" && alpha) {
assert_colors(input.value, hexalpha);
} else if (colorSpace === "display-p3" && !alpha) {
assert_colors(input.value, p3);
} else {
assert_colors(input.value, p3alpha);
}
}, `Testing ${nameValue} with color space '${colorSpace}' and ${alpha ? 'with' : ' without'} alpha (value)`);
});
});
});

test(() => {
const input = document.createElement("input");
input.type = "color";
assert_equals(input.value, "#000000");
input.value = "ActiveBorder";
assert_not_equals(input.value, "#000000");
}, "System colors are parsed");

test(() => {
const input = document.createElement("input");
input.type = "color";
input.alpha = true;
input.colorSpace = "display-p3";
input.value = "color(display-p3 3 none .2 / .6)";
assert_equals(input.value, "color(display-p3 3 0 0.2 / 0.6)");
}, "Display P3 colors can be out-of-bounds");

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