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Filename : pseudos.js
back
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.verifyPseudoArgs = exports.pseudos = void 0;
// While filters are precompiled, pseudos get called when they are needed
exports.pseudos = {
    empty: function (elem, _a) {
        var adapter = _a.adapter;
        return !adapter.getChildren(elem).some(function (elem) {
            // FIXME: `getText` call is potentially expensive.
            return adapter.isTag(elem) || adapter.getText(elem) !== "";
        });
    },
    "first-child": function (elem, _a) {
        var adapter = _a.adapter, equals = _a.equals;
        if (adapter.prevElementSibling) {
            return adapter.prevElementSibling(elem) == null;
        }
        var firstChild = adapter
            .getSiblings(elem)
            .find(function (elem) { return adapter.isTag(elem); });
        return firstChild != null && equals(elem, firstChild);
    },
    "last-child": function (elem, _a) {
        var adapter = _a.adapter, equals = _a.equals;
        var siblings = adapter.getSiblings(elem);
        for (var i = siblings.length - 1; i >= 0; i--) {
            if (equals(elem, siblings[i]))
                return true;
            if (adapter.isTag(siblings[i]))
                break;
        }
        return false;
    },
    "first-of-type": function (elem, _a) {
        var adapter = _a.adapter, equals = _a.equals;
        var siblings = adapter.getSiblings(elem);
        var elemName = adapter.getName(elem);
        for (var i = 0; i < siblings.length; i++) {
            var currentSibling = siblings[i];
            if (equals(elem, currentSibling))
                return true;
            if (adapter.isTag(currentSibling) &&
                adapter.getName(currentSibling) === elemName) {
                break;
            }
        }
        return false;
    },
    "last-of-type": function (elem, _a) {
        var adapter = _a.adapter, equals = _a.equals;
        var siblings = adapter.getSiblings(elem);
        var elemName = adapter.getName(elem);
        for (var i = siblings.length - 1; i >= 0; i--) {
            var currentSibling = siblings[i];
            if (equals(elem, currentSibling))
                return true;
            if (adapter.isTag(currentSibling) &&
                adapter.getName(currentSibling) === elemName) {
                break;
            }
        }
        return false;
    },
    "only-of-type": function (elem, _a) {
        var adapter = _a.adapter, equals = _a.equals;
        var elemName = adapter.getName(elem);
        return adapter
            .getSiblings(elem)
            .every(function (sibling) {
            return equals(elem, sibling) ||
                !adapter.isTag(sibling) ||
                adapter.getName(sibling) !== elemName;
        });
    },
    "only-child": function (elem, _a) {
        var adapter = _a.adapter, equals = _a.equals;
        return adapter
            .getSiblings(elem)
            .every(function (sibling) { return equals(elem, sibling) || !adapter.isTag(sibling); });
    },
};
function verifyPseudoArgs(func, name, subselect, argIndex) {
    if (subselect === null) {
        if (func.length > argIndex) {
            throw new Error("Pseudo-class :".concat(name, " requires an argument"));
        }
    }
    else if (func.length === argIndex) {
        throw new Error("Pseudo-class :".concat(name, " doesn't have any arguments"));
    }
}
exports.verifyPseudoArgs = verifyPseudoArgs;
//# sourceMappingURL=pseudos.js.map