third_party/WebKit/Source/platform/transforms/TransformOperations.h

/*
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
 *
 * 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 TransformOperations_h
#define TransformOperations_h

#include "platform/geometry/LayoutSize.h"
#include "platform/transforms/TransformOperation.h"
#include "wtf/Allocator.h"
#include "wtf/RefPtr.h"
#include "wtf/Vector.h"

namespace blink {
class FloatBox;

class PLATFORM_EXPORT EmptyTransformOperations final {
  DISALLOW_NEW();
};

class PLATFORM_EXPORT TransformOperations {
  DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();

 public:
  explicit TransformOperations(bool makeIdentity = false);
  TransformOperations(const EmptyTransformOperations&) {}

  bool operator==(const TransformOperations& o) const;
  bool operator!=(const TransformOperations& o) const { return !(*this == o); }

  void apply(const FloatSize& sz, TransformationMatrix& t) const {
    for (unsigned i = 0; i < m_operations.size(); ++i)
      m_operations[i]->apply(t, sz);
  }

  // Return true if any of the operation types are 3D operation types (even if
  // the values describe affine transforms)
  bool has3DOperation() const {
    for (unsigned i = 0; i < m_operations.size(); ++i)
      if (m_operations[i]->is3DOperation())
        return true;
    return false;
  }

  bool dependsOnBoxSize() const {
    for (unsigned i = 0; i < m_operations.size(); ++i) {
      if (m_operations[i]->dependsOnBoxSize())
        return true;
    }
    return false;
  }

  bool operationsMatch(const TransformOperations&) const;

  void clear() { m_operations.clear(); }

  Vector<RefPtr<TransformOperation>>& operations() { return m_operations; }
  const Vector<RefPtr<TransformOperation>>& operations() const {
    return m_operations;
  }

  size_t size() const { return m_operations.size(); }
  const TransformOperation* at(size_t index) const {
    return index < m_operations.size() ? m_operations.at(index).get() : 0;
  }

  bool blendedBoundsForBox(const FloatBox&,
                           const TransformOperations& from,
                           const double& minProgress,
                           const double& maxProgress,
                           FloatBox* bounds) const;
  TransformOperations blendByMatchingOperations(const TransformOperations& from,
                                                const double& progress) const;
  PassRefPtr<TransformOperation> blendByUsingMatrixInterpolation(
      const TransformOperations& from,
      double progress) const;
  TransformOperations blend(const TransformOperations& from,
                            double progress) const;
  TransformOperations add(const TransformOperations& addend) const;
  TransformOperations zoom(double factor) const;

 private:
  Vector<RefPtr<TransformOperation>> m_operations;
};

}  // namespace blink

#endif  // TransformOperations_h