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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
const RANDOM_KEYWORDS = [
"auto",
"element-scoped",
"fixed",
"property-index-scoped",
"property-scoped",
];
/**
* Compute the autocomplete data for the random() function.
*
* @param {object} params
* @param {Array<InspectorCSSToken>} params.functionTokens
* The tokens representing the function parameters.
* @returns {object} An object containing the autocomplete items in `list`.
*/
export function getAutocompleteDataForRandomFunction({ functionTokens }) {
// <random()> = random( <random-key>? , <calc-sum>, <calc-sum>, <calc-sum>? )
// <random-key> = auto | <random-cache-key> | fixed <number [0,1]>
// <random-cache-key> = <dashed-ident> || element-scoped
// || [ property-scoped | property-index-scoped | <random-ua-ident> ]
// <random-ua-ident> = <custom-ident>
const lastToken = functionTokens.at(-1);
const isLastTokenComplete = !!lastToken?.complete;
let hasComma = false;
let hasDashedIdentCacheKey = false;
let hasElementScoped = false;
let hasPropertyScope = false;
for (const token of functionTokens) {
if (token === lastToken && !isLastTokenComplete) {
continue;
}
if (token.tokenType === "Comma") {
hasComma = true;
break;
}
if (token.tokenType === "Ident" && token.text.startsWith("--")) {
hasDashedIdentCacheKey = true;
}
if (token.tokenType === "Ident" && token.text === "element-scoped") {
hasElementScoped = true;
}
if (
token.tokenType === "Ident" &&
(token.text === "property-scoped" ||
token.text === "property-index-scoped")
) {
hasPropertyScope = true;
}
}
if (hasComma) {
return { list: [] };
}
if (hasElementScoped && hasPropertyScope) {
return { list: [] };
}
if (hasElementScoped) {
return {
list: ["property-index-scoped", "property-scoped"],
};
}
if (hasPropertyScope) {
return { list: ["element-scoped"] };
}
if (hasDashedIdentCacheKey) {
return {
list: ["element-scoped", "property-index-scoped", "property-scoped"],
};
}
if (
functionTokens.length === 0 ||
(functionTokens.length === 1 && !isLastTokenComplete)
) {
return { list: RANDOM_KEYWORDS };
}
return { list: [] };
}