dom/svg/SVGSwitchElement.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_SVGSWITCHELEMENT_H_
   8 #define DOM_SVG_SVGSWITCHELEMENT_H_
   9
  10 #include "mozilla/dom/SVGGraphicsElement.h"
  11 #include "nsCOMPtr.h"
  12
  13 nsresult NS_NewSVGSwitchElement(
  14     nsIContent** aResult, already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
  15
  16 namespace mozilla {
  17 namespace dom {
  18
  19 using SVGSwitchElementBase = SVGGraphicsElement;
  20
  21 class SVGSwitchElement final : public SVGSwitchElementBase {
  22  protected:
  23   friend nsresult(::NS_NewSVGSwitchElement(
  24       nsIContent** aResult,
  25       already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
  26   explicit SVGSwitchElement(
  27       already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
  28   ~SVGSwitchElement() = default;
  29   virtual JSObject* WrapNode(JSContext* aCx,
  30                              JS::Handle<JSObject*> aGivenProto) override;
  31
  32  public:
  33   nsIContent* GetActiveChild() const { return mActiveChild; }
  34   void MaybeInvalidate();
  35
  36   // interfaces:
  37
  38   NS_DECL_ISUPPORTS_INHERITED
  39   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGSwitchElement,
  40                                            SVGSwitchElementBase)
  41   // nsINode
  42   virtual nsresult InsertChildBefore(nsIContent* aKid, nsIContent* aBeforeThis,
  43                                      bool aNotify) override;
  44   virtual void RemoveChildNode(nsIContent* aKid, bool aNotify) override;
  45
  46   // nsIContent
  47   NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
  48
  49   virtual nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
  50
  51  private:
  52   void UpdateActiveChild() { mActiveChild = FindActiveChild(); }
  53   nsIContent* FindActiveChild() const;
  54
  55   // only this child will be displayed
  56   nsCOMPtr<nsIContent> mActiveChild;
  57 };
  58
  59 }  // namespace dom
  60 }  // namespace mozilla
  61
  62 #endif  // DOM_SVG_SVGSWITCHELEMENT_H_