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

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2001 Dirk Mueller (mueller@kde.org)
 *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
 * rights reserved.
 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
 * (http://www.torchmobile.com/)
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 * Copyright (C) 2011 Google Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef TreeScopeStyleSheetCollection_h
#define TreeScopeStyleSheetCollection_h

#include "core/CoreExport.h"
#include "core/dom/Document.h"
#include "core/dom/DocumentOrderedList.h"
#include "core/dom/StyleSheetCollection.h"
#include "core/dom/TreeScope.h"
#include "wtf/HashMap.h"
#include "wtf/ListHashSet.h"
#include "wtf/Vector.h"
#include "wtf/text/WTFString.h"

namespace blink {

class Node;
class StyleSheetContents;
class StyleRuleFontFace;

class CORE_EXPORT TreeScopeStyleSheetCollection : public StyleSheetCollection {
 public:
  void addStyleSheetCandidateNode(Node&);
  void removeStyleSheetCandidateNode(Node& node) {
    m_styleSheetCandidateNodes.remove(&node);
  }
  bool hasStyleSheetCandidateNodes() const {
    return !m_styleSheetCandidateNodes.isEmpty();
  }

  void clearMediaQueryRuleSetStyleSheets();

  virtual bool isShadowTreeStyleSheetCollection() const { return false; }

  DECLARE_VIRTUAL_TRACE();

 protected:
  explicit TreeScopeStyleSheetCollection(TreeScope&);

  Document& document() const { return treeScope().document(); }
  TreeScope& treeScope() const { return *m_treeScope; }

  enum StyleResolverUpdateType { Reconstruct, Reset, Additive };

  class StyleSheetChange {
    STACK_ALLOCATED();

   public:
    StyleResolverUpdateType styleResolverUpdateType;
    bool requiresFullStyleRecalc;
    HeapVector<Member<const StyleRuleFontFace>> fontFaceRulesToRemove;

    StyleSheetChange()
        : styleResolverUpdateType(Reconstruct), requiresFullStyleRecalc(true) {}
  };

  void analyzeStyleSheetChange(StyleResolverUpdateMode,
                               const HeapVector<Member<CSSStyleSheet>>&,
                               StyleSheetChange&);

 private:
  static StyleResolverUpdateType compareStyleSheets(
      const HeapVector<Member<CSSStyleSheet>>& oldStyleSheets,
      const HeapVector<Member<CSSStyleSheet>>& newStylesheets,
      HeapVector<Member<StyleSheetContents>>& addedSheets);
  bool activeLoadingStyleSheetLoaded(
      const HeapVector<Member<CSSStyleSheet>>& newStyleSheets);

  friend class TreeScopeStyleSheetCollectionTest;

 protected:
  Member<TreeScope> m_treeScope;
  bool m_hadActiveLoadingStylesheet;

  DocumentOrderedList m_styleSheetCandidateNodes;
};

}  // namespace blink

#endif