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isFirstNested.js
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isFirstNested.js
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'use strict';
const { isComment, hasSource } = require('./typeGuards');
/**
* @param {import('postcss').Node} statement
* @returns {boolean}
*/
module.exports = function(statement) {
const parentNode = statement.parent;
if (parentNode === undefined || parentNode.type === 'root') {
return false;
}
if (statement === parentNode.first) {
return true;
}
/*
* Search for the statement in the parent's nodes, ignoring comment
* nodes on the same line as the parent's opening brace.
*/
const parentNodes = parentNode.nodes;
if (!parentNodes) {
return false;
}
const firstNode = parentNodes[0];
if (
!isComment(firstNode) ||
(typeof firstNode.raws.before === 'string' && firstNode.raws.before.includes('\n'))
) {
return false;
}
if (!hasSource(firstNode) || !firstNode.source.start) {
return false;
}
const openingBraceLine = firstNode.source.start.line;
if (!firstNode.source.end || openingBraceLine !== firstNode.source.end.line) {
return false;
}
for (let i = 1; i < parentNodes.length; i++) {
const node = parentNodes[i];
if (node === statement) {
return true;
}
if (
!isComment(node) ||
(hasSource(node) && node.source.end && node.source.end.line !== openingBraceLine)
) {
return false;
}
}
/* istanbul ignore next: Should always return in the loop */
return false;
};