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      1 /*
      2  * Copyright (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      3  * Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "CounterContent.h"
     26 #include "StringImpl.h"
     27 #include "StyleImage.h"
     28 
     29 namespace WebCore {
     30 
     31 void ContentData::clear()
     32 {
     33     deleteContent();
     34 
     35     ContentData* n = m_next;
     36     m_next = 0;
     37 
     38     // Reverse the list so we can delete without recursing.
     39     ContentData* last = 0;
     40     ContentData* c;
     41     while ((c = n)) {
     42         n = c->m_next;
     43         c->m_next = last;
     44         last = c;
     45     }
     46     for (c = last; c; c = n) {
     47         n = c->m_next;
     48         c->m_next = 0;
     49         delete c;
     50     }
     51 }
     52 
     53 bool ContentData::dataEquivalent(const ContentData& other) const
     54 {
     55     if (type() != other.type())
     56         return false;
     57 
     58     switch (type()) {
     59         case CONTENT_NONE:
     60             return true;
     61             break;
     62         case CONTENT_TEXT:
     63             return equal(text(), other.text());
     64             break;
     65         case CONTENT_OBJECT:
     66             return StyleImage::imagesEquivalent(image(), other.image());
     67             break;
     68         case CONTENT_COUNTER:
     69             return *counter() == *other.counter();
     70             break;
     71     }
     72 
     73     ASSERT_NOT_REACHED();
     74     return false;
     75 }
     76 
     77 void ContentData::deleteContent()
     78 {
     79     switch (m_type) {
     80         case CONTENT_NONE:
     81             break;
     82         case CONTENT_OBJECT:
     83             m_content.m_image->deref();
     84             break;
     85         case CONTENT_TEXT:
     86             m_content.m_text->deref();
     87             break;
     88         case CONTENT_COUNTER:
     89             delete m_content.m_counter;
     90             break;
     91     }
     92 
     93     m_type = CONTENT_NONE;
     94 }
     95 
     96 } // namespace WebCore
     97