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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
* 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 LayoutQuote_h
#define LayoutQuote_h
#include "core/layout/LayoutInline.h"
#include "core/style/QuotesData.h"
namespace blink {
class Document;
class LayoutTextFragment;
// LayoutQuote is the layout object associated with generated quotes
// ("content: open-quote | close-quote | no-open-quote | no-close-quote").
// http://www.w3.org/TR/CSS2/generate.html#quotes-insert
//
// 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 {
public:
LayoutQuote(Document*, const QuoteType);
~LayoutQuote() override;
void attachQuote();
const char* name() const override { return "LayoutQuote"; }
private:
void detachQuote();
void willBeDestroyed() override;
bool isOfType(LayoutObjectType type) const override {
return type == LayoutObjectQuote || LayoutInline::isOfType(type);
}
void styleDidChange(StyleDifference, const ComputedStyle*) override;
void willBeRemovedFromTree() override;
String computeText() const;
void updateText();
const QuotesData* quotesData() const;
void updateDepth();
bool isAttached() { return m_attached; }
LayoutTextFragment* findFragmentChild() const;
// Type of this LayoutQuote: open-quote, close-quote, no-open-quote,
// no-close-quote.
QuoteType m_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 m_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* m_next;
LayoutQuote* m_previous;
// 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 m_attached;
// Cached text for this quote.
String m_text;
};
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutQuote, isQuote());
} // namespace blink
#endif // LayoutQuote_h
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