File:  [mozdev] / chimera / GeckoUtils.h
Revision 1.3: download - view: text, annotated - select for diffs - revision graph
Sun Mar 10 19:26:16 2002 UTC (15 years, 9 months ago) by hyatt
Branches: MAIN
CVS tags: HEAD
Full implementation of window autosaving (including correct ignoring of windows opened as popups by web pages.

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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 the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or 
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
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 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef __GeckoUtils_h__
#define __GeckoUtils_h__

class GeckoUtils
{
public:
  static void GatherTextUnder(nsIDOMNode* aNode, nsString& aResult) {
    nsAutoString text;
    nsCOMPtr<nsIDOMNode> node;
    aNode->GetFirstChild(getter_AddRefs(node));
    PRUint32 depth = 1;
    while (node && depth) {
      nsCOMPtr<nsIDOMCharacterData> charData(do_QueryInterface(node));
      PRUint16 nodeType;
      node->GetNodeType(&nodeType);
      if (charData && nodeType == nsIDOMNode::TEXT_NODE) {
        // Add this text to our collection.
        text += NS_LITERAL_STRING(" ");
        nsAutoString data;
        charData->GetData(data);
        text += data;
      }
      else {
        nsCOMPtr<nsIDOMHTMLImageElement> img(do_QueryInterface(node));
        if (img) {
          nsAutoString altText;
          img->GetAlt(altText);
          if (!altText.IsEmpty()) {
            text = altText;
            break;
          }
        }
      }

      // Find the next node to test.
      PRBool hasChildNodes;
      node->HasChildNodes(&hasChildNodes);
      if (hasChildNodes) {
        nsCOMPtr<nsIDOMNode> temp = node;
        temp->GetFirstChild(getter_AddRefs(node));
        depth++;
      }
      else {
        nsCOMPtr<nsIDOMNode> nextSibling;
        node->GetNextSibling(getter_AddRefs(nextSibling));
        if (nextSibling)
          node = nextSibling;
        else {
          nsCOMPtr<nsIDOMNode> parentNode;
          node->GetParentNode(getter_AddRefs(parentNode));
          if (!parentNode)
            node = nsnull;
          else {
            nsCOMPtr<nsIDOMNode> nextSibling;
            parentNode->GetNextSibling(getter_AddRefs(nextSibling));
            node = nextSibling;
            depth--;
          }
        }
      }
    }

    text.CompressWhitespace();
    aResult = text;
  };
};


#endif

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