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      1 /*
      2  * Copyright (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      3  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  *
     20  */
     21 
     22 #include "config.h"
     23 #include "ContentData.h"
     24 
     25 #include "StyleImage.h"
     26 #include <wtf/text/StringImpl.h>
     27 
     28 namespace WebCore {
     29 
     30 void ContentData::clear()
     31 {
     32     deleteContent();
     33 
     34     // Delete the singly-linked list without recursing.
     35     for (OwnPtr<ContentData> next = m_next.release(); next; next = next->m_next.release()) { }
     36 }
     37 
     38 // FIXME: Why isn't this just operator==?
     39 // FIXME: This is not a good name for a boolean-returning function.
     40 bool ContentData::dataEquivalent(const ContentData& other) const
     41 {
     42     if (type() != other.type())
     43         return false;
     44 
     45     switch (type()) {
     46     case CONTENT_NONE:
     47         return true;
     48     case CONTENT_TEXT:
     49         return equal(text(), other.text());
     50     case CONTENT_OBJECT:
     51         return StyleImage::imagesEquivalent(image(), other.image());
     52     case CONTENT_COUNTER:
     53         return *counter() == *other.counter();
     54     case CONTENT_QUOTE:
     55         return quote() == other.quote();
     56     }
     57 
     58     ASSERT_NOT_REACHED();
     59     return false;
     60 }
     61 
     62 void ContentData::deleteContent()
     63 {
     64     switch (m_type) {
     65     case CONTENT_NONE:
     66         break;
     67     case CONTENT_OBJECT:
     68         m_content.m_image->deref();
     69         break;
     70     case CONTENT_TEXT:
     71         m_content.m_text->deref();
     72         break;
     73     case CONTENT_COUNTER:
     74         delete m_content.m_counter;
     75         break;
     76     case CONTENT_QUOTE:
     77         break;
     78     }
     79 
     80     m_type = CONTENT_NONE;
     81 }
     82 
     83 } // namespace WebCore
     84