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/*
* 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) 2004-2010, 2012-2013, 2015 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 AuthorStyleSheets_h
#define AuthorStyleSheets_h
#include "Timer.h"
#include <memory>
#include <wtf/FastMalloc.h>
#include <wtf/HashMap.h>
#include <wtf/ListHashSet.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class CSSStyleSheet;
class Document;
class Node;
class StyleSheet;
class StyleSheetContents;
class StyleSheetList;
class ShadowRoot;
class TreeScope;
class AuthorStyleSheets {
WTF_MAKE_FAST_ALLOCATED;
public:
explicit AuthorStyleSheets(Document&);
explicit AuthorStyleSheets(ShadowRoot&);
const Vector<RefPtr<CSSStyleSheet>>& activeStyleSheets() const { return m_activeStyleSheets; }
const Vector<RefPtr<StyleSheet>>& styleSheetsForStyleSheetList() const { return m_styleSheetsForStyleSheetList; }
const Vector<RefPtr<CSSStyleSheet>> activeStyleSheetsForInspector() const;
void addStyleSheetCandidateNode(Node&, bool createdByParser);
void removeStyleSheetCandidateNode(Node&);
enum UpdateFlag { NoUpdate = 0, OptimizedUpdate, FullUpdate };
UpdateFlag pendingUpdateType() const { return m_pendingUpdateType; }
void setPendingUpdateType(UpdateFlag updateType)
{
if (updateType > m_pendingUpdateType)
m_pendingUpdateType = updateType;
}
void flushPendingUpdates()
{
if (m_pendingUpdateType != NoUpdate)
updateActiveStyleSheets(m_pendingUpdateType);
}
bool updateActiveStyleSheets(UpdateFlag);
String preferredStylesheetSetName() const { return m_preferredStylesheetSetName; }
String selectedStylesheetSetName() const { return m_selectedStylesheetSetName; }
void setPreferredStylesheetSetName(const String& name) { m_preferredStylesheetSetName = name; }
void setSelectedStylesheetSetName(const String& name) { m_selectedStylesheetSetName = name; }
void addPendingSheet() { m_pendingStyleSheetCount++; }
enum RemovePendingSheetNotificationType {
RemovePendingSheetNotifyImmediately,
RemovePendingSheetNotifyLater
};
void removePendingSheet(RemovePendingSheetNotificationType = RemovePendingSheetNotifyImmediately);
bool hasPendingSheets() const { return m_pendingStyleSheetCount > 0; }
bool usesRemUnits() const { return m_usesRemUnits; }
void setUsesRemUnit(bool b) { m_usesRemUnits = b; }
bool usesStyleBasedEditability() { return m_usesStyleBasedEditability; }
bool activeStyleSheetsContains(const CSSStyleSheet*) const;
private:
void collectActiveStyleSheets(Vector<RefPtr<StyleSheet>>&);
enum StyleResolverUpdateType {
Reconstruct,
Reset,
Additive
};
StyleResolverUpdateType analyzeStyleSheetChange(UpdateFlag, const Vector<RefPtr<CSSStyleSheet>>& newStylesheets, bool& requiresFullStyleRecalc);
void updateStyleResolver(Vector<RefPtr<CSSStyleSheet>>&, StyleResolverUpdateType);
Document& m_document;
ShadowRoot* m_shadowRoot { nullptr };
Vector<RefPtr<StyleSheet>> m_styleSheetsForStyleSheetList;
Vector<RefPtr<CSSStyleSheet>> m_activeStyleSheets;
// This is a mirror of m_activeAuthorStyleSheets that gets populated on demand for activeStyleSheetsContains().
mutable std::unique_ptr<HashSet<const CSSStyleSheet*>> m_weakCopyOfActiveStyleSheetListForFastLookup;
// Track the number of currently loading top-level stylesheets needed for rendering.
// Sheets loaded using the @import directive are not included in this count.
// We use this count of pending sheets to detect when we can begin attaching
// elements and when it is safe to execute scripts.
int m_pendingStyleSheetCount { 0 };
bool m_hadActiveLoadingStylesheet { false };
UpdateFlag m_pendingUpdateType { NoUpdate };
ListHashSet<Node*> m_styleSheetCandidateNodes;
String m_preferredStylesheetSetName;
String m_selectedStylesheetSetName;
bool m_usesRemUnits { false };
bool m_usesStyleBasedEditability { false };
};
}
#endif
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