gecko-dev/dom/tests/js/DumpTree.js

/* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */


//
// travers the html tree and dump out the type of element
//
function traverse(node, indent)
{
    dump("\n")
    indent += "  "
    var type = node.nodeType;

    // if it's an element dump the tag and recurse the children
    if (type == Node.ELEMENT_NODE) {

        dump(indent + node.tagName)

        // go through the children
        if (node.hasChildNodes()) {
            var children = node.childNodes;
            var length = children.length;
            var count = 0;
            while(count < length) {
                child = children[count]
                traverse(child, indent)
                count++
            }
        }
    }
    // it's just text, no tag, dump "Text"
    else if (type == Node.TEXT_NODE) {
        dump(indent + "Text")
    }
}

var node = document.documentElement

traverse(node, "")
dump("\n")