1/**
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2006, 2007 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#include "config.h"
22#include "StyleSheetList.h"
23
24#include "CSSStyleSheet.h"
25#include "Document.h"
26#include "DocumentStyleSheetCollection.h"
27#include "HTMLNames.h"
28#include "HTMLStyleElement.h"
29#include <wtf/text/WTFString.h>
30
31namespace WebCore {
32
33using namespace HTMLNames;
34
35StyleSheetList::StyleSheetList(Document* document)
36    : m_document(document)
37{
38}
39
40StyleSheetList::~StyleSheetList()
41{
42}
43
44inline const Vector<RefPtr<StyleSheet> >& StyleSheetList::styleSheets() const
45{
46    if (!m_document)
47        return m_detachedStyleSheets;
48    return m_document->styleSheetCollection()->styleSheetsForStyleSheetList();
49}
50
51void StyleSheetList::detachFromDocument()
52{
53    m_detachedStyleSheets = m_document->styleSheetCollection()->styleSheetsForStyleSheetList();
54    m_document = 0;
55}
56
57unsigned StyleSheetList::length() const
58{
59    return styleSheets().size();
60}
61
62StyleSheet* StyleSheetList::item(unsigned index)
63{
64    const Vector<RefPtr<StyleSheet> >& sheets = styleSheets();
65    return index < sheets.size() ? sheets[index].get() : 0;
66}
67
68HTMLStyleElement* StyleSheetList::getNamedItem(const String& name) const
69{
70    if (!m_document)
71        return 0;
72
73    // IE also supports retrieving a stylesheet by name, using the name/id of the <style> tag
74    // (this is consistent with all the other collections)
75    // ### Bad implementation because returns a single element (are IDs always unique?)
76    // and doesn't look for name attribute.
77    // But unicity of stylesheet ids is good practice anyway ;)
78    Element* element = m_document->getElementById(name);
79    if (element && element->hasTagName(styleTag))
80        return static_cast<HTMLStyleElement*>(element);
81    return 0;
82}
83
84} // namespace WebCore
85