SVGTransformableElement.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef DOM_SVG_SVGTRANSFORMABLEELEMENT_H_

#define DOM_SVG_SVGTRANSFORMABLEELEMENT_H_

#include "gfxMatrix.h"

#include "mozilla/Attributes.h"

#include "mozilla/dom/SVGAnimatedTransformList.h"

#include "mozilla/dom/SVGElement.h"

#include "mozilla/gfx/Matrix.h"

#include "mozilla/UniquePtr.h"

namespace mozilla::dom {

class DOMSVGAnimatedTransformList;

class SVGGraphicsElement;

class SVGMatrix;

class SVGRect;

struct SVGBoundingBoxOptions;

class SVGTransformableElement : public SVGElement {

 public:

  explicit SVGTransformableElement(already_AddRefed<dom::NodeInfo>&& aNodeInfo)

      : SVGElement(std::move(aNodeInfo)) {}

  virtual ~SVGTransformableElement() = default;

  nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override = 0;

  // WebIDL

  already_AddRefed<DOMSVGAnimatedTransformList> Transform();

  // nsIContent interface

  nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,

                                      int32_t aModType) const override;

  // SVGElement overrides

  bool IsEventAttributeNameInternal(nsAtom* aName) override;

  gfxMatrix PrependLocalTransformsTo(

      const gfxMatrix& aMatrix,

      SVGTransformTypes aWhich = eAllTransforms) const override;

  const gfx::Matrix* GetAnimateMotionTransform() const override;

  void SetAnimateMotionTransform(const gfx::Matrix* aMatrix) override;

  SVGAnimatedTransformList* GetAnimatedTransformList(

      uint32_t aFlags = 0) override;

  nsStaticAtom* GetTransformListAttrName() const override {

    return nsGkAtoms::transform;

  bool IsTransformable() override { return true; }

 protected:

/**

   * Helper for overrides of PrependLocalTransformsTo.  If both arguments are

   * provided they are multiplied in the order in which the arguments appear,

   * and the result is returned.  If neither argument is provided, the identity

   * matrix is returned.  If only one argument is provided its transform is

   * returned.

*/

  static gfxMatrix GetUserToParentTransform(

      const gfx::Matrix* aAnimateMotionTransform,

      const SVGAnimatedTransformList* aTransforms);

  UniquePtr<SVGAnimatedTransformList> mTransforms;

  // XXX maybe move this to property table, to save space on un-animated elems?

  UniquePtr<gfx::Matrix> mAnimateMotionTransform;

};

}  // namespace mozilla::dom

#endif  // DOM_SVG_SVGTRANSFORMABLEELEMENT_H_