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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _postcssValueParser = _interopRequireDefault(require("postcss-value-parser"));
var _cssnanoUtils = require("cssnano-utils");
var _map = _interopRequireDefault(require("./lib/map"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function evenValues(list, index) {
return index % 2 === 0;
}
const repeatKeywords = _map.default.map(mapping => mapping[0]);
const getMatch = (0, _cssnanoUtils.getMatch)(_map.default);
function isCommaNode(node) {
return node.type === 'div' && node.value === ',';
}
function isVariableFunctionNode(node) {
if (node.type !== 'function') {
return false;
}
return ['var', 'env'].includes(node.value.toLowerCase());
}
function transform(value) {
const parsed = (0, _postcssValueParser.default)(value);
if (parsed.nodes.length === 1) {
return value;
}
const ranges = [];
let rangeIndex = 0;
let shouldContinue = true;
parsed.nodes.forEach((node, index) => {
// After comma (`,`) follows next background
if (isCommaNode(node)) {
rangeIndex += 1;
shouldContinue = true;
return;
}
if (!shouldContinue) {
return;
} // After separator (`/`) follows `background-size` values
// Avoid them
if (node.type === 'div' && node.value === '/') {
shouldContinue = false;
return;
}
if (!ranges[rangeIndex]) {
ranges[rangeIndex] = {
start: null,
end: null
};
} // Do not try to be processed `var and `env` function inside background
if (isVariableFunctionNode(node)) {
shouldContinue = false;
ranges[rangeIndex].start = null;
ranges[rangeIndex].end = null;
return;
}
const isRepeatKeyword = node.type === 'word' && repeatKeywords.includes(node.value.toLowerCase());
if (ranges[rangeIndex].start === null && isRepeatKeyword) {
ranges[rangeIndex].start = index;
ranges[rangeIndex].end = index;
return;
}
if (ranges[rangeIndex].start !== null) {
if (node.type === 'space') {
return;
} else if (isRepeatKeyword) {
ranges[rangeIndex].end = index;
return;
}
return;
}
});
ranges.forEach(range => {
if (range.start === null) {
return;
}
const nodes = parsed.nodes.slice(range.start, range.end + 1);
if (nodes.length !== 3) {
return;
}
const match = getMatch(nodes.filter(evenValues).map(n => n.value.toLowerCase()));
if (match) {
nodes[0].value = match;
nodes[1].value = nodes[2].value = '';
}
});
return parsed.toString();
}
function pluginCreator() {
return {
postcssPlugin: 'postcss-normalize-repeat-style',
prepare() {
const cache = {};
return {
OnceExit(css) {
css.walkDecls(/^(background(-repeat)?|(-\w+-)?mask-repeat)$/i, decl => {
const value = decl.value;
if (!value) {
return;
}
if (cache[value]) {
decl.value = cache[value];
return;
}
const result = transform(value);
decl.value = result;
cache[value] = result;
});
}
};
}
};
}
pluginCreator.postcss = true;
var _default = pluginCreator;
exports.default = _default;
module.exports = exports.default;