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/*
* Copyright (C) 2011 Apple 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 LayoutTextCombine_h
#define LayoutTextCombine_h
#include "core/layout/LayoutText.h"
#include "platform/fonts/Font.h"
namespace blink {
// LayoutTextCombine uses different coordinate systems for layout and inlineTextBox,
// because it is treated as 1em-box character in vertical flow for the layout,
// while its inline box is in horizontal flow.
class LayoutTextCombine final : public LayoutText {
public:
LayoutTextCombine(Node*, PassRefPtr<StringImpl>);
void updateFont();
bool isCombined() const { return m_isCombined; }
float combinedTextWidth(const Font& font) const { return font.getFontDescription().computedSize(); }
const Font& originalFont() const { return parent()->style()->font(); }
void transformToInlineCoordinates(GraphicsContext&, const LayoutRect& boxRect, bool clip = false) const;
LayoutUnit inlineWidthForLayout() const;
const char* name() const override { return "LayoutTextCombine"; }
private:
bool isCombineText() const override { return true; }
float width(unsigned from, unsigned length, const Font&, LayoutUnit xPosition, TextDirection, HashSet<const SimpleFontData*>* fallbackFonts = nullptr, FloatRect* glyphBounds = nullptr) const override;
void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
void setTextInternal(PassRefPtr<StringImpl>) override;
void updateIsCombined();
float m_combinedTextWidth;
float m_scaleX;
bool m_isCombined : 1;
bool m_needsFontUpdate : 1;
};
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTextCombine, isCombineText());
inline LayoutUnit LayoutTextCombine::inlineWidthForLayout() const
{
ASSERT(!m_needsFontUpdate);
return LayoutUnit::fromFloatCeil(m_combinedTextWidth);
}
} // namespace blink
#endif // LayoutTextCombine_h
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