third_party/WebKit/Source/core/dom/StyleElement.h

   1 /*
   2  * Copyright (C) 2006, 2007 Rob Buis
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public License
  15  * along with this library; see the file COPYING.LIB.  If not, write to
  16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #ifndef StyleElement_h
  22 #define StyleElement_h
  23
  24 #include "core/css/CSSStyleSheet.h"
  25 #include "wtf/text/TextPosition.h"
  26
  27 namespace blink {
  28
  29 class ContainerNode;
  30 class Document;
  31 class Element;
  32
  33 class StyleElement : public WillBeGarbageCollectedMixin {
  34 public:
  35     StyleElement(Document*, bool createdByParser);
  36     virtual ~StyleElement();
  37     DECLARE_VIRTUAL_TRACE();
  38
  39 protected:
  40     enum ProcessingResult {
  41         ProcessingSuccessful,
  42         ProcessingFatalError
  43     };
  44
  45     virtual const AtomicString& type() const = 0;
  46     virtual const AtomicString& media() const = 0;
  47
  48     CSSStyleSheet* sheet() const { return m_sheet.get(); }
  49
  50     bool isLoading() const;
  51     bool sheetLoaded(Document&);
  52     void startLoadingDynamicSheet(Document&);
  53
  54     void insertedInto(Element*, ContainerNode* insertionPoint);
  55     void removedFrom(Element*, ContainerNode* insertionPoint);
  56     void clearDocumentData(Document&, Element*);
  57     ProcessingResult processStyleSheet(Document&, Element*);
  58     ProcessingResult childrenChanged(Element*);
  59     ProcessingResult finishParsingChildren(Element*);
  60
  61     RefPtrWillBeMember<CSSStyleSheet> m_sheet;
  62
  63 private:
  64     ProcessingResult createSheet(Element*, const String& text = String());
  65     ProcessingResult process(Element*);
  66     void clearSheet(Element* ownerElement = 0);
  67
  68     bool m_createdByParser : 1;
  69     bool m_loading : 1;
  70     bool m_registeredAsCandidate : 1;
  71     TextPosition m_startPosition;
  72 };
  73
  74 }
  75
  76 #endif