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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 "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 Vector<RefPtr<StyleSheet> >& StyleSheetList::styleSheets()
     44 {
     45     if (!m_treeScope)
     46         return m_detachedStyleSheets;
     47     return document()->styleEngine()->styleSheetsForStyleSheetList(*m_treeScope);
     48 }
     49 
     50 void StyleSheetList::detachFromDocument()
     51 {
     52     m_detachedStyleSheets = document()->styleEngine()->styleSheetsForStyleSheetList(*m_treeScope);
     53     m_treeScope = 0;
     54 }
     55 
     56 unsigned StyleSheetList::length()
     57 {
     58     return styleSheets().size();
     59 }
     60 
     61 StyleSheet* StyleSheetList::item(unsigned index)
     62 {
     63     const Vector<RefPtr<StyleSheet> >& sheets = styleSheets();
     64     return index < sheets.size() ? sheets[index].get() : 0;
     65 }
     66 
     67 HTMLStyleElement* StyleSheetList::getNamedItem(const AtomicString& name) const
     68 {
     69     if (!m_treeScope)
     70         return 0;
     71 
     72     // IE also supports retrieving a stylesheet by name, using the name/id of the <style> tag
     73     // (this is consistent with all the other collections)
     74     // ### Bad implementation because returns a single element (are IDs always unique?)
     75     // and doesn't look for name attribute.
     76     // But unicity of stylesheet ids is good practice anyway ;)
     77     // FIXME: We should figure out if we should change this or fix the spec.
     78     Element* element = m_treeScope->getElementById(name);
     79     if (element && element->hasTagName(styleTag))
     80         return toHTMLStyleElement(element);
     81     return 0;
     82 }
     83 
     84 CSSStyleSheet* StyleSheetList::anonymousNamedGetter(const AtomicString& name)
     85 {
     86     HTMLStyleElement* item = getNamedItem(name);
     87     if (!item)
     88         return 0;
     89     return item->sheet();
     90 }
     91 
     92 } // namespace WebCore
     93