Function geneSelector

Pagetual/pagetual.user.js:4643–4717

(ele, addID, exact)

    }

    function geneSelector(ele, addID, exact) {
        let selector = ele.nodeName.toLowerCase();
        //Google id class都是隨機。百度更過分，style script順序都是隨機的
        if (selector !== "html" && selector !== "body") {
            let hasId = false;
            if (addID && ele.id && /^[a-z_][\w\-_]*$/i.test(ele.id)) {
                if (ele.ownerDocument && ele.ownerDocument.querySelectorAll("#" + ele.id).length === 1) {
                    hasId = true;
                    selector = '#' + ele.id;
                }
            }
            if (!hasId) {
                let className = "";
                if (ele.className) {
                    let classList = ele.classList;
                    for (let i = 0; i < classList.length; i++) {
                        let c = classList[i];
                        if (c !== 'scrolling' && /^[a-z_][\w\-_]*$/.test(c) && !/\d{4,}/.test(c)) {
                            className += '.' + c;
                        }
                    }
                    selector += className;
                }
                let parent = ele.parentElement;
                if (parent) {
                    if (exact) {
                        let i, nth = 0, all = 0;
                        for (i = 0; i < parent.children.length; i++) {
                            if (parent.children[i].nodeName === ele.nodeName) {
                                all++;
                                if (parent.children[i] === ele) {
                                    nth = all;
                                }
                                if (nth > 0 && all > 1) {
                                    break;
                                }
                            }
                        }
                        selector += (all === 1 ? "" : `:nth-of-type(${nth})`);
                    } else if (!className && !hasId && parent.children.length > 1 && !compareNodeName(parent, ["html"])) {
                        let prevE = ele.previousElementSibling;
                        if (prevE && prevE.className) {
                            let classList = prevE.classList;
                            for (let i = 0; i < classList.length; i++) {
                                let c = classList[i];
                                if (c !== 'scrolling' && /^[a-z_][\w\-_]*$/.test(c) && !/\d{4,}/.test(c)) {
                                    className += '.' + c;
                                }
                            }
                            if (className) {
                                selector = prevE.nodeName.toLowerCase() + className + "+" + selector;
                            }
                        }
                        if (!className) {
                            let i, nth = 0, all = 0;
                            for (i = 0; i < parent.children.length; i++) {
                                if (parent.children[i].nodeName === ele.nodeName) {
                                    all++;