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* Copyright (C) 2011 Nokia Inc. All rights reserved.
* Copyright (C) 2012 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
* 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 LayoutQuote_h
#define LayoutQuote_h
#include "core/layout/LayoutInline.h"
#include "core/style/QuotesData.h"
namespace blink {
class LayoutTextFragment;
class PseudoElement;
// LayoutQuote is the layout object associated with generated quotes
// ("content: open-quote | close-quote | no-open-quote | no-close-quote").
// This object is generated thus always anonymous.
// For performance reasons, LayoutQuotes form a doubly-linked list. See |m_next|
// and |m_previous| below.
class LayoutQuote final : public LayoutInline {
LayoutQuote(PseudoElement&, const QuoteType);
~LayoutQuote() override;
void AttachQuote();
const char* GetName() const override { return "LayoutQuote"; }
void DetachQuote();
void WillBeDestroyed() override;
bool IsOfType(LayoutObjectType type) const override {
return type == kLayoutObjectQuote || LayoutInline::IsOfType(type);
void StyleDidChange(StyleDifference, const ComputedStyle*) override;
void WillBeRemovedFromTree() override;
String ComputeText() const;
void UpdateText();
const QuotesData* GetQuotesData() const;
void UpdateDepth();
bool IsAttached() { return attached_; }
LayoutTextFragment* FindFragmentChild() const;
// Type of this LayoutQuote: open-quote, close-quote, no-open-quote,
// no-close-quote.
QuoteType type_;
// Number of open quotes in the tree. Also called the nesting level
// in CSS 2.1.
// Used to determine if a LayoutQuote is invalid (closing quote without a
// matching opening quote) and which quote character to use (see the 'quote'
// property that is used to define quote character pairs).
int depth_;
// The next and previous LayoutQuote in layout tree order.
// LayoutQuotes are linked together by this doubly-linked list.
// Those are used to compute |m_depth| in an efficient manner.
LayoutQuote* next_;
LayoutQuote* previous_;
// The pseudo-element that owns us.
// Lifetime is the same as LayoutObject::m_node, so this is safe.
UntracedMember<PseudoElement> owning_pseudo_;
// This tracks whether this LayoutQuote was inserted into the layout tree
// and its position in the linked list is correct (m_next and m_previous).
// It's used for both performance (avoid unneeded tree walks to find the
// previous and next quotes) and conformance (|m_depth| relies on an
// up-to-date linked list positions).
bool attached_;
// Cached text for this quote.
String text_;
} // namespace blink
#endif // LayoutQuote_h