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

/*
 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
 * Copyright (C) 2009 Google, Inc.
 * Copyright (C) 2009 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 LayoutSVGViewportContainer_h
#define LayoutSVGViewportContainer_h

#include "core/layout/svg/LayoutSVGContainer.h"

namespace blink {

// This is used for non-root <svg> elements and <marker> elements, neither of
// which are SVGTransformable thus we inherit from LayoutSVGContainer instead of
// LayoutSVGTransformableContainer
class LayoutSVGViewportContainer final : public LayoutSVGContainer {
 public:
  explicit LayoutSVGViewportContainer(SVGElement*);
  FloatRect viewport() const { return m_viewport; }

  bool isLayoutSizeChanged() const { return m_isLayoutSizeChanged; }

  void determineIfLayoutSizeChanged() override;
  void setNeedsTransformUpdate() override;

  void paint(const PaintInfo&, const LayoutPoint&) const override;

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

 private:
  bool isOfType(LayoutObjectType type) const override {
    return type == LayoutObjectSVGViewportContainer ||
           LayoutSVGContainer::isOfType(type);
  }

  AffineTransform viewportTransform() const;
  const AffineTransform& localToSVGParentTransform() const override {
    return m_localToParentTransform;
  }

  void calcViewport() override;
  SVGTransformChange calculateLocalTransform() override;

  bool pointIsInsideViewportClip(const FloatPoint& pointInParent) override;

  FloatRect m_viewport;
  mutable AffineTransform m_localToParentTransform;
  bool m_isLayoutSizeChanged : 1;
  bool m_needsTransformUpdate : 1;
};

DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGViewportContainer,
                                isSVGViewportContainer());

}  // namespace blink

#endif  // LayoutSVGViewportContainer_h