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/*
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
* Copyright (C) 2015 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.
*/
#pragma once
#include "InlineIteratorSVGTextBox.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace WebCore {
class AffineTransform;
class SVGInlineTextBox;
using SVGChunkTransformMap = UncheckedKeyHashMap<InlineIterator::SVGTextBox::Key, AffineTransform>;
using SVGTextFragmentMap = UncheckedKeyHashMap<InlineIterator::SVGTextBox::Key, Vector<SVGTextFragment>>;
// 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(const Vector<InlineIterator::SVGTextBoxIterator>&, unsigned first, unsigned limit, SVGTextFragmentMap&);
unsigned totalCharacters() const;
float totalLength() const;
float totalAnchorShift() const;
void layout(SVGChunkTransformMap&) const;
private:
void processTextAnchorCorrection() const;
void buildBoxTransformations(SVGChunkTransformMap&) const;
void processTextLengthSpacingCorrection() const;
bool isVerticalText() const { return m_chunkStyle & VerticalText; }
float desiredTextLength() const { return m_desiredTextLength; }
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 | EndAnchor)); }
bool hasLengthAdjustSpacing() const { return m_chunkStyle & LengthAdjustSpacing; }
bool hasLengthAdjustSpacingAndGlyphs() const { return m_chunkStyle & LengthAdjustSpacingAndGlyphs; }
bool boxSpacingAndGlyphsTransform(const Vector<SVGTextFragment>&, AffineTransform&) const;
Vector<SVGTextFragment>& fragments(InlineIterator::SVGTextBoxIterator);
const Vector<SVGTextFragment>& fragments(InlineIterator::SVGTextBoxIterator) const;
private:
// Contains all SVGInlineTextBoxes this chunk spans.
struct BoxAndFragments {
InlineIterator::SVGTextBoxIterator box;
Vector<SVGTextFragment>& fragments;
};
Vector<BoxAndFragments> m_boxes;
unsigned m_chunkStyle { DefaultStyle };
float m_desiredTextLength { 0 };
};
} // namespace WebCore
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