xpath.js

来自「Harvestman-最新版本」· JavaScript 代码 · 共 33 行

function getXPath(node, path) {
    path = path || [];
    if(node.parentNode) {
        path = getXPath(node.parentNode, path);
    }
    
    if(node.previousSibling) {
        var count = 1;
        var sibling = node.previousSibling
            do {
                if(sibling.nodeType == 1 && sibling.nodeName == node.nodeName) {count++;}
                sibling = sibling.previousSibling;
            } while(sibling);
        if(count == 1) {count = null;}
    } else if(node.nextSibling) {
        var sibling = node.nextSibling;
        do {
            if(sibling.nodeType == 1 && sibling.nodeName == node.nodeName) {
                var count = 1;
                sibling = null;
            } else {
                var count = null;
                sibling = sibling.previousSibling;
            }
        } while(sibling);
    }
    
    if(node.nodeType == 1) {
        path.push(node.nodeName.toLowerCase() + (node.id ? "[@id='"+node.id+"']" : count > 0 ? "["+count+"]" : ''));
    }
    return path;
};