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/*
* Copyright (C) Research In Motion Limited 2010. 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 SVGTextChunk_h
#define SVGTextChunk_h
#if ENABLE(SVG)
#include "SVGRenderStyleDefs.h"
#include "SVGTextContentElement.h"
namespace WebCore {
class SVGInlineTextBox;
// A SVGTextChunk describes a range of SVGTextFragments, see the SVG spec definition of a "text chunk".
class SVGTextChunk {
public:
enum ChunkStyle {
DefaultStyle = 1 << 0,
MiddleAnchor = 1 << 1,
EndAnchor = 1 << 2,
RightToLeftText = 1 << 3,
VerticalText = 1 << 4,
LengthAdjustSpacing = 1 << 5,
LengthAdjustSpacingAndGlyphs = 1 << 6
};
SVGTextChunk(unsigned chunkStyle, float desiredTextLength);
void calculateLength(float& length, unsigned& characters) const;
float calculateTextAnchorShift(float length) const;
bool isVerticalText() const { return m_chunkStyle & VerticalText; }
float desiredTextLength() const { return m_desiredTextLength; }
Vector<SVGInlineTextBox*>& boxes() { return m_boxes; }
const Vector<SVGInlineTextBox*>& boxes() const { return m_boxes; }
bool hasDesiredTextLength() const { return m_desiredTextLength > 0 && ((m_chunkStyle & LengthAdjustSpacing) || (m_chunkStyle & LengthAdjustSpacingAndGlyphs)); }
bool hasTextAnchor() const { return m_chunkStyle & RightToLeftText ? !(m_chunkStyle & EndAnchor) : (m_chunkStyle & MiddleAnchor) || (m_chunkStyle & EndAnchor); }
bool hasLengthAdjustSpacing() const { return m_chunkStyle & LengthAdjustSpacing; }
bool hasLengthAdjustSpacingAndGlyphs() const { return m_chunkStyle & LengthAdjustSpacingAndGlyphs; }
private:
// Contains all SVGInlineTextBoxes this chunk spans.
Vector<SVGInlineTextBox*> m_boxes;
unsigned m_chunkStyle;
float m_desiredTextLength;
};
} // namespace WebCore
#endif // ENABLE(SVG)
#endif
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