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 "core/css/StyleSheetList.h"
23
24#include "core/HTMLNames.h"
25#include "core/dom/Document.h"
26#include "core/dom/StyleEngine.h"
27#include "core/html/HTMLStyleElement.h"
28#include "wtf/text/WTFString.h"
29
30namespace blink {
31
32using namespace HTMLNames;
33
34StyleSheetList::StyleSheetList(TreeScope* treeScope)
35    : m_treeScope(treeScope)
36{
37}
38
39StyleSheetList::~StyleSheetList()
40{
41}
42
43inline const WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >& StyleSheetList::styleSheets()
44{
45#if !ENABLE(OILPAN)
46    if (!m_treeScope)
47        return m_detachedStyleSheets;
48#endif
49    return document()->styleEngine()->styleSheetsForStyleSheetList(*m_treeScope);
50}
51
52#if !ENABLE(OILPAN)
53void StyleSheetList::detachFromDocument()
54{
55    m_detachedStyleSheets = document()->styleEngine()->styleSheetsForStyleSheetList(*m_treeScope);
56    m_treeScope = nullptr;
57}
58#endif
59
60unsigned StyleSheetList::length()
61{
62    return styleSheets().size();
63}
64
65StyleSheet* StyleSheetList::item(unsigned index)
66{
67    const WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >& sheets = styleSheets();
68    return index < sheets.size() ? sheets[index].get() : 0;
69}
70
71HTMLStyleElement* StyleSheetList::getNamedItem(const AtomicString& name) const
72{
73#if !ENABLE(OILPAN)
74    if (!m_treeScope)
75        return 0;
76#endif
77
78    // IE also supports retrieving a stylesheet by name, using the name/id of the <style> tag
79    // (this is consistent with all the other collections)
80    // ### Bad implementation because returns a single element (are IDs always unique?)
81    // and doesn't look for name attribute.
82    // But unicity of stylesheet ids is good practice anyway ;)
83    // FIXME: We should figure out if we should change this or fix the spec.
84    Element* element = m_treeScope->getElementById(name);
85    return isHTMLStyleElement(element) ? toHTMLStyleElement(element) : 0;
86}
87
88CSSStyleSheet* StyleSheetList::anonymousNamedGetter(const AtomicString& name)
89{
90    HTMLStyleElement* item = getNamedItem(name);
91    if (!item)
92        return 0;
93    return item->sheet();
94}
95
96void StyleSheetList::trace(Visitor* visitor)
97{
98    visitor->trace(m_treeScope);
99}
100
101} // namespace blink
102