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Also derive variables in URLs

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This commit is contained in:
RMidhunSuresh 2022-04-06 12:23:55 +05:30
parent 454345c9b2
commit 48d0242c80
2 changed files with 44 additions and 4 deletions
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23
scripts/postcss/css-compile-variables.js
View file

@ -43,17 +43,32 @@ function parseDeclarationValue(value) {
const parsed = valueParser(value);
const variables = [];
parsed.walk(node => {
if (node.type !== "function" && node.value !== "var") {
if (node.type !== "function") {
return;
}
const variable = node.nodes[0];
variables.push(variable.value);
switch (node.value) {
case "var": {
const variable = node.nodes[0];
variables.push(variable.value);
break;
}
case "url": {
const url = node.nodes[0].value;
// resolve url with some absolute url so that we get the query params without using regex
const params = new URL(url, "file://foo/bar/").searchParams;
const primary = params.get("primary");
const secondary = params.get("secondary");
if (primary) { variables.push(primary); }
if (secondary) { variables.push(secondary); }
break;
}
}
});
return variables;
}
function resolveDerivedVariable(decl, derive) {
const RE_VARIABLE_VALUE = /--((.+)--(.+)-(.+))/;
const RE_VARIABLE_VALUE = /(?:--)?((.+)--(.+)-(.+))/;
const variableCollection = parseDeclarationValue(decl.value);
for (const variable of variableCollection) {
const matches = variable.match(RE_VARIABLE_VALUE);

25
scripts/postcss/test.js
View file

@ -134,6 +134,31 @@ module.exports.tests = function tests() {
const actualArray = compiledVariables.get("/foo/bar")["derived-variables"];
const expectedArray = ["icon-color--darker-20", "my-alias=icon-color--darker-20", "my-alias--lighter-15"];
assert.deepStrictEqual(actualArray.sort(), expectedArray.sort());
},
"derived variable are supported in urls": async (assert) => {
const inputCSS = `
:root {
--foo-color: #ff0;
}
div {
background-color: var(--foo-color--lighter-50);
background: url("./foo/bar/icon.svg?primary=foo-color--darker-5");
}
a {
background: url("foo/bar/icon.svg");
}`;
const transformedColorLighter = offColor("#ff0").lighten(0.5);
const transformedColorDarker = offColor("#ff0").darken(0.05);
const outputCSS =
inputCSS +
`
:root {
--foo-color--lighter-50: ${transformedColorLighter.hex()};
--foo-color--darker-5: ${transformedColorDarker.hex()};
}
`;
await run( inputCSS, outputCSS, {}, assert);
}
};
};