dom/svg/SVGTransformableElement.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef DOM_SVG_SVGTRANSFORMABLEELEMENT_H_
   8 #define DOM_SVG_SVGTRANSFORMABLEELEMENT_H_
   9
  10 #include "gfxMatrix.h"
  11 #include "mozilla/Attributes.h"
  12 #include "mozilla/dom/SVGAnimatedTransformList.h"
  13 #include "mozilla/dom/SVGElement.h"
  14 #include "mozilla/gfx/Matrix.h"
  15 #include "mozilla/UniquePtr.h"
  16
  17 namespace mozilla::dom {
  18
  19 class DOMSVGAnimatedTransformList;
  20 class SVGGraphicsElement;
  21 class SVGMatrix;
  22 class SVGRect;
  23 struct SVGBoundingBoxOptions;
  24
  25 class SVGTransformableElement : public SVGElement {
  26  public:
  27   explicit SVGTransformableElement(already_AddRefed<dom::NodeInfo>&& aNodeInfo)
  28       : SVGElement(std::move(aNodeInfo)) {}
  29   virtual ~SVGTransformableElement() = default;
  30
  31   nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override = 0;
  32
  33   // WebIDL
  34   already_AddRefed<DOMSVGAnimatedTransformList> Transform();
  35
  36   // nsIContent interface
  37   nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,
  38                                       int32_t aModType) const override;
  39
  40   // SVGElement overrides
  41   bool IsEventAttributeNameInternal(nsAtom* aName) override;
  42
  43   gfxMatrix PrependLocalTransformsTo(
  44       const gfxMatrix& aMatrix,
  45       SVGTransformTypes aWhich = eAllTransforms) const override;
  46   const gfx::Matrix* GetAnimateMotionTransform() const override;
  47   void SetAnimateMotionTransform(const gfx::Matrix* aMatrix) override;
  48
  49   SVGAnimatedTransformList* GetAnimatedTransformList(
  50       uint32_t aFlags = 0) override;
  51   nsStaticAtom* GetTransformListAttrName() const override {
  52     return nsGkAtoms::transform;
  53   }
  54
  55   bool IsTransformable() override { return true; }
  56
  57  protected:
  58   /**
  59    * Helper for overrides of PrependLocalTransformsTo.  If both arguments are
  60    * provided they are multiplied in the order in which the arguments appear,
  61    * and the result is returned.  If neither argument is provided, the identity
  62    * matrix is returned.  If only one argument is provided its transform is
  63    * returned.
  64    */
  65   static gfxMatrix GetUserToParentTransform(
  66       const gfx::Matrix* aAnimateMotionTransform,
  67       const SVGAnimatedTransformList* aTransforms);
  68
  69   UniquePtr<SVGAnimatedTransformList> mTransforms;
  70
  71   // XXX maybe move this to property table, to save space on un-animated elems?
  72   UniquePtr<gfx::Matrix> mAnimateMotionTransform;
  73 };
  74
  75 }  // namespace mozilla::dom
  76
  77 #endif  // DOM_SVG_SVGTRANSFORMABLEELEMENT_H_