third_party/WebKit/Source/core/layout/svg/LayoutSVGInlineText.h

/*
 * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2008 Rob Buis <buis@kde.org>
 *
 * 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 LayoutSVGInlineText_h
#define LayoutSVGInlineText_h

#include "core/layout/LayoutText.h"
#include "core/layout/svg/SVGCharacterData.h"
#include "core/layout/svg/SVGTextMetrics.h"
#include "wtf/Vector.h"

namespace blink {

class LayoutSVGInlineText final : public LayoutText {
 public:
  LayoutSVGInlineText(Node*, PassRefPtr<StringImpl>);

  bool characterStartsNewTextChunk(int position) const;
  SVGCharacterDataMap& characterDataMap() { return m_characterDataMap; }
  const SVGCharacterDataMap& characterDataMap() const {
    return m_characterDataMap;
  }

  const Vector<SVGTextMetrics>& metricsList() const { return m_metrics; }

  float scalingFactor() const { return m_scalingFactor; }
  const Font& scaledFont() const { return m_scaledFont; }
  void updateScaledFont();
  void updateMetricsList(bool& lastCharacterWasWhiteSpace);
  static void computeNewScaledFontForStyle(LayoutObject*,
                                           float& scalingFactor,
                                           Font& scaledFont);

  // Preserves floating point precision for the use in DRT. It knows how to
  // round and does a better job than enclosingIntRect.
  FloatRect floatLinesBoundingBox() const;

  PassRefPtr<StringImpl> originalText() const override;

  const char* name() const override { return "LayoutSVGInlineText"; }

 private:
  void setTextInternal(PassRefPtr<StringImpl>) override;
  void styleDidChange(StyleDifference, const ComputedStyle*) override;

  void addMetricsFromRun(const TextRun&, bool& lastCharacterWasWhiteSpace);

  FloatRect objectBoundingBox() const override {
    return floatLinesBoundingBox();
  }

  bool isOfType(LayoutObjectType type) const override {
    return type == LayoutObjectSVG || type == LayoutObjectSVGInlineText ||
           LayoutText::isOfType(type);
  }

  PositionWithAffinity positionForPoint(const LayoutPoint&) override;
  LayoutRect localCaretRect(
      InlineBox*,
      int caretOffset,
      LayoutUnit* extraWidthToEndOfLine = nullptr) override;
  LayoutRect linesBoundingBox() const override;
  InlineTextBox* createTextBox(int start, unsigned short length) override;

  LayoutRect absoluteClippedOverflowRect() const final;
  FloatRect paintInvalidationRectInLocalSVGCoordinates() const final;

  float m_scalingFactor;
  Font m_scaledFont;
  SVGCharacterDataMap m_characterDataMap;
  Vector<SVGTextMetrics> m_metrics;
};

DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGInlineText, isSVGInlineText());

}  // namespace blink

#endif  // LayoutSVGInlineText_h