less
Version:
Leaner CSS
145 lines • 5.29 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var comment_1 = tslib_1.__importDefault(require("../tree/comment"));
var node_1 = tslib_1.__importDefault(require("../tree/node"));
var dimension_1 = tslib_1.__importDefault(require("../tree/dimension"));
var declaration_1 = tslib_1.__importDefault(require("../tree/declaration"));
var expression_1 = tslib_1.__importDefault(require("../tree/expression"));
var ruleset_1 = tslib_1.__importDefault(require("../tree/ruleset"));
var selector_1 = tslib_1.__importDefault(require("../tree/selector"));
var element_1 = tslib_1.__importDefault(require("../tree/element"));
var quoted_1 = tslib_1.__importDefault(require("../tree/quoted"));
var value_1 = tslib_1.__importDefault(require("../tree/value"));
var getItemsFromNode = function (node) {
// handle non-array values as an array of length 1
// return 'undefined' if index is invalid
var items = Array.isArray(node.value) ?
node.value : Array(node);
return items;
};
exports.default = {
_SELF: function (n) {
return n;
},
'~': function () {
var expr = [];
for (var _i = 0; _i < arguments.length; _i++) {
expr[_i] = arguments[_i];
}
if (expr.length === 1) {
return expr[0];
}
return new value_1.default(expr);
},
extract: function (values, index) {
// (1-based index)
index = index.value - 1;
return getItemsFromNode(values)[index];
},
length: function (values) {
return new dimension_1.default(getItemsFromNode(values).length);
},
/**
* Creates a Less list of incremental values.
* Modeled after Lodash's range function, also exists natively in PHP
*
* @param {Dimension} [start=1]
* @param {Dimension} end - e.g. 10 or 10px - unit is added to output
* @param {Dimension} [step=1]
*/
range: function (start, end, step) {
var from;
var to;
var stepValue = 1;
var list = [];
if (end) {
to = end;
from = start.value;
if (step) {
stepValue = step.value;
}
}
else {
from = 1;
to = start;
}
for (var i = from; i <= to.value; i += stepValue) {
list.push(new dimension_1.default(i, to.unit));
}
return new expression_1.default(list);
},
each: function (list, rs) {
var _this = this;
var rules = [];
var newRules;
var iterator;
var tryEval = function (val) {
if (val instanceof node_1.default) {
return val.eval(_this.context);
}
return val;
};
if (list.value && !(list instanceof quoted_1.default)) {
if (Array.isArray(list.value)) {
iterator = list.value.map(tryEval);
}
else {
iterator = [tryEval(list.value)];
}
}
else if (list.ruleset) {
iterator = tryEval(list.ruleset).rules;
}
else if (list.rules) {
iterator = list.rules.map(tryEval);
}
else if (Array.isArray(list)) {
iterator = list.map(tryEval);
}
else {
iterator = [tryEval(list)];
}
var valueName = '@value';
var keyName = '@key';
var indexName = '@index';
if (rs.params) {
valueName = rs.params[0] && rs.params[0].name;
keyName = rs.params[1] && rs.params[1].name;
indexName = rs.params[2] && rs.params[2].name;
rs = rs.rules;
}
else {
rs = rs.ruleset;
}
for (var i = 0; i < iterator.length; i++) {
var key = void 0;
var value = void 0;
var item = iterator[i];
if (item instanceof declaration_1.default) {
key = typeof item.name === 'string' ? item.name : item.name[0].value;
value = item.value;
}
else {
key = new dimension_1.default(i + 1);
value = item;
}
if (item instanceof comment_1.default) {
continue;
}
newRules = rs.rules.slice(0);
if (valueName) {
newRules.push(new declaration_1.default(valueName, value, false, false, this.index, this.currentFileInfo));
}
if (indexName) {
newRules.push(new declaration_1.default(indexName, new dimension_1.default(i + 1), false, false, this.index, this.currentFileInfo));
}
if (keyName) {
newRules.push(new declaration_1.default(keyName, key, false, false, this.index, this.currentFileInfo));
}
rules.push(new ruleset_1.default([new (selector_1.default)([new element_1.default('', '&')])], newRules, rs.strictImports, rs.visibilityInfo()));
}
return new ruleset_1.default([new (selector_1.default)([new element_1.default('', '&')])], rules, rs.strictImports, rs.visibilityInfo()).eval(this.context);
}
};
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