gecko-dev/dom/events/PaintRequest.h

/* -*- 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 mozilla_dom_PaintRequest_h_
#define mozilla_dom_PaintRequest_h_

#include "nsPresContext.h"
#include "mozilla/Attributes.h"
#include "mozilla/RefPtr.h"
#include "mozilla/dom/Event.h"
#include "nsWrapperCache.h"

namespace mozilla {
namespace dom {

class DOMRect;

class PaintRequest final : public nsISupports, public nsWrapperCache {
 public:
  explicit PaintRequest(Event* aParent) : mParent(aParent) {}

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(PaintRequest)

  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;

  Event* GetParentObject() const { return mParent; }

  already_AddRefed<DOMRect> ClientRect();
  void GetReason(nsAString& aResult) const { aResult.AssignLiteral("repaint"); }

  void SetRequest(const nsRect& aRequest) { mRequest = aRequest; }

 private:
  ~PaintRequest() = default;

  RefPtr<Event> mParent;
  nsRect mRequest;
};

class PaintRequestList final : public nsISupports, public nsWrapperCache {
 public:
  explicit PaintRequestList(Event* aParent) : mParent(aParent) {}

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(PaintRequestList)

  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;
  nsISupports* GetParentObject() { return mParent; }

  void Append(PaintRequest* aElement) { mArray.AppendElement(aElement); }

  uint32_t Length() { return mArray.Length(); }

  PaintRequest* Item(uint32_t aIndex) { return mArray.SafeElementAt(aIndex); }
  PaintRequest* IndexedGetter(uint32_t aIndex, bool& aFound) {
    aFound = aIndex < mArray.Length();
    if (!aFound) {
      return nullptr;
    }
    return mArray.ElementAt(aIndex);
  }

 private:
  ~PaintRequestList() = default;

  nsTArray<RefPtr<PaintRequest> > mArray;
  RefPtr<Event> mParent;
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_PaintRequest_h_