uc脚本微调求助

// ==UserScript==
// @name                newTabByLongPress.uc.js
// @description         Lesezeichen mit länger gedrückter Linken Maustaste in neuem Tab öffnen
// @include             main
// @version             0.8.4  Nur bei Lesezeichen ändern
// @version             0.8.3  Link-Korrekturen
// @version             0.8.2  Für Links aber nicht von Bildern
// @version             0.8.1  Timer-Korrektur
// ==/UserScript==
(function () {
    'use strict';
 
    const WAIT = 1; // Zeitspanne die die Maustaste gedrückt werden muss, in Millisekunden；长按为250
    const IN_BACKGROUND = true; // Tab im Hintergrund öffnen
    const RELATED_TO_CURRENT = true; // Link oder Lesezeichen direkt neben dem aktuellen Tab öffnen?
 
    var timeoutID;
    var longPress = false;
 
    function handleLongPress (e) {
        if (timeoutID) {
            clearTimeout(timeoutID);
            timeoutID = null;
        }
 
        if (e.button !== 1) return; 
        if (e.altKey || e.ctrlKey || e.shiftKey) return;
 
        var node = e.target || e.originalTarget;
        if (!node) return;
 
        var url = getPlacesURI(e, node);
        if (!url) return;
 
        if (e.type === 'mousedown') {
            timeoutID = setTimeout(function () {
                addEventListener('click', function clk(e) {
                    removeEventListener('click', clk, true);
                    e.preventDefault();
                    e.stopPropagation();
                }, true);
                gBrowser.loadOneTab(url, {
                    relatedToCurrent: RELATED_TO_CURRENT,
                    inBackground: IN_BACKGROUND,
                    referrerURI: makeURI(gBrowser.currentURI.spec),
                    triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal()
                });
                longPress = true;
            }, WAIT);
        } else {
            clearTimeout(timeoutID);
            if (longPress && e.type === 'mouseup') {
                e.preventDefault();
                longPress = false;
            }
        }
    }
 
    function getPlacesURI (e, node) {
        if (!node || !node.localName)
            return;
        var lnlc = node.localName.toLowerCase();
        if (node._placesNode && PlacesUtils.nodeIsURI(node._placesNode)
            || (lnlc === 'treechildren' && (isBookmarkTree(node.parentNode)
            || isHistoryTree(node.parentNode)))) {
            return (lnlc === 'treechildren') ? getTreeInfo(e, 'uri') : node._placesNode.uri;
        }
    }
 
    function getTreeInfo (e, prop) {
        if (!('PlacesUtils' in window))
            return '';
        var tree = (e.target || e.originalTarget).parentNode;
        tree = tree.wrappedJSObject || tree;
        var row = {}, col = {}, obj = {};
        var tbo = tree.treeBoxObject;
        tbo.getCellAt(e.clientX, e.clientY, row, col, obj);
        if (row.value === -1)
            return '';
        try {
            var node = tree.view.nodeForTreeIndex(row.value);
        } catch(ex) {}
        if (!node || !PlacesUtils.nodeIsURI(node))
            return '';
        return node[prop];
    }
 
    function isBookmarkTree(tree) {
        return isPlacesTree(tree)
            && /[:&]folder=/.test(tree.getAttribute("place"));
    }
 
    function isHistoryTree(tree) {
        if(!isPlacesTree(tree))
            return false;
        var place = tree.getAttribute("place");
        return !/[:&]folder=/.test(place)
            && !/[:&]transition=7(?:&|$)/.test(place);
    }
 
    function isPlacesTree(tree) {
        return tree.getAttribute("type") === "places";
    }
 
    ['mousedown', 'mouseup', 'dragstart'].forEach(function (type) {
        addEventListener(type, handleLongPress, true);
    });
 
}());