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      1 /**
      2  * (C) 1999-2003 Lars Knoll (knoll (at) 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 
     30 namespace WebCore {
     31 
     32 using namespace HTMLNames;
     33 
     34 StyleSheetList::StyleSheetList(TreeScope* treeScope)
     35     : m_treeScope(treeScope)
     36 {
     37 }
     38 
     39 StyleSheetList::~StyleSheetList()
     40 {
     41 }
     42 
     43 inline 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)
     53 void StyleSheetList::detachFromDocument()
     54 {
     55     m_detachedStyleSheets = document()->styleEngine()->styleSheetsForStyleSheetList(*m_treeScope);
     56     m_treeScope = nullptr;
     57 }
     58 #endif
     59 
     60 unsigned StyleSheetList::length()
     61 {
     62     return styleSheets().size();
     63 }
     64 
     65 StyleSheet* StyleSheetList::item(unsigned index)
     66 {
     67     const WillBeHeapVector<RefPtrWillBeMember<StyleSheet> >& sheets = styleSheets();
     68     return index < sheets.size() ? sheets[index].get() : 0;
     69 }
     70 
     71 HTMLStyleElement* 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 
     88 CSSStyleSheet* StyleSheetList::anonymousNamedGetter(const AtomicString& name)
     89 {
     90     HTMLStyleElement* item = getNamedItem(name);
     91     if (!item)
     92         return 0;
     93     return item->sheet();
     94 }
     95 
     96 void StyleSheetList::trace(Visitor* visitor)
     97 {
     98     visitor->trace(m_treeScope);
     99 }
    100 
    101 } // namespace WebCore
    102