subselects.js
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"use strict";
var __spreadArray = (this && this.__spreadArray) || function (to, from) {
for (var i = 0, il = from.length, j = to.length; i < il; i++, j++)
to[j] = from[i];
return to;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.subselects = exports.getNextSiblings = exports.ensureIsTag = exports.PLACEHOLDER_ELEMENT = void 0;
var boolbase_1 = require("boolbase");
var procedure_1 = require("../procedure");
/** Used as a placeholder for :has. Will be replaced with the actual element. */
exports.PLACEHOLDER_ELEMENT = {};
function ensureIsTag(next, adapter) {
if (next === boolbase_1.falseFunc)
return next;
return function (elem) { return adapter.isTag(elem) && next(elem); };
}
exports.ensureIsTag = ensureIsTag;
function getNextSiblings(elem, adapter) {
var siblings = adapter.getSiblings(elem);
if (siblings.length <= 1)
return [];
var elemIndex = siblings.indexOf(elem);
if (elemIndex < 0 || elemIndex === siblings.length - 1)
return [];
return siblings.slice(elemIndex + 1).filter(adapter.isTag);
}
exports.getNextSiblings = getNextSiblings;
var is = function (next, token, options, context, compileToken) {
var opts = {
xmlMode: !!options.xmlMode,
adapter: options.adapter,
equals: options.equals,
};
var func = compileToken(token, opts, context);
return function (elem) { return func(elem) && next(elem); };
};
/*
* :not, :has, :is and :matches have to compile selectors
* doing this in src/pseudos.ts would lead to circular dependencies,
* so we add them here
*/
exports.subselects = {
is: is,
/**
* `:matches` is an alias for `:is`.
*/
matches: is,
not: function (next, token, options, context, compileToken) {
var opts = {
xmlMode: !!options.xmlMode,
adapter: options.adapter,
equals: options.equals,
};
var func = compileToken(token, opts, context);
if (func === boolbase_1.falseFunc)
return next;
if (func === boolbase_1.trueFunc)
return boolbase_1.falseFunc;
return function not(elem) {
return !func(elem) && next(elem);
};
},
has: function (next, subselect, options, _context, compileToken) {
var adapter = options.adapter;
var opts = {
xmlMode: !!options.xmlMode,
adapter: adapter,
equals: options.equals,
};
// @ts-expect-error Uses an array as a pointer to the current element (side effects)
var context = subselect.some(function (s) {
return s.some(procedure_1.isTraversal);
})
? [exports.PLACEHOLDER_ELEMENT]
: undefined;
var compiled = compileToken(subselect, opts, context);
if (compiled === boolbase_1.falseFunc)
return boolbase_1.falseFunc;
if (compiled === boolbase_1.trueFunc) {
return function (elem) {
return adapter.getChildren(elem).some(adapter.isTag) && next(elem);
};
}
var hasElement = ensureIsTag(compiled, adapter);
var _a = compiled.shouldTestNextSiblings, shouldTestNextSiblings = _a === void 0 ? false : _a;
/*
* `shouldTestNextSiblings` will only be true if the query starts with
* a traversal (sibling or adjacent). That means we will always have a context.
*/
if (context) {
return function (elem) {
context[0] = elem;
var childs = adapter.getChildren(elem);
var nextElements = shouldTestNextSiblings
? __spreadArray(__spreadArray([], childs), getNextSiblings(elem, adapter)) : childs;
return (next(elem) && adapter.existsOne(hasElement, nextElements));
};
}
return function (elem) {
return next(elem) &&
adapter.existsOne(hasElement, adapter.getChildren(elem));
};
},
};