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Diffstat (limited to '')
| -rw-r--r-- | dom/base/DOMRect.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/dom/base/DOMRect.h b/dom/base/DOMRect.h new file mode 100644 index 0000000000..8cacd9a1dc --- /dev/null +++ b/dom/base/DOMRect.h @@ -0,0 +1,179 @@ +/* -*- 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_DOMRECT_H_ +#define MOZILLA_DOMRECT_H_ + +#include <algorithm> +#include <cstdint> +#include <new> +#include <utility> +#include "js/TypeDecls.h" +#include "mozilla/AlreadyAddRefed.h" +#include "mozilla/Assertions.h" +#include "mozilla/FloatingPoint.h" +#include "mozilla/RefPtr.h" +#include "nsCOMPtr.h" +#include "nsCycleCollectionParticipant.h" +#include "nsISupports.h" +#include "nsTArray.h" +#include "nsWrapperCache.h" + +class JSObject; +class nsIGlobalObject; +struct JSContext; +struct JSStructuredCloneReader; +struct JSStructuredCloneWriter; +struct nsRect; + +namespace mozilla::dom { + +class GlobalObject; +struct DOMRectInit; + +class DOMRectReadOnly : public nsISupports, public nsWrapperCache { + protected: + virtual ~DOMRectReadOnly() = default; + + public: + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(DOMRectReadOnly) + + explicit DOMRectReadOnly(nsISupports* aParent, double aX = 0, double aY = 0, + double aWidth = 0, double aHeight = 0) + : mParent(aParent), mX(aX), mY(aY), mWidth(aWidth), mHeight(aHeight) {} + + nsISupports* GetParentObject() const { + MOZ_ASSERT(mParent); + return mParent; + } + + virtual JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + static already_AddRefed<DOMRectReadOnly> FromRect(const GlobalObject& aGlobal, + const DOMRectInit& aInit); + + static already_AddRefed<DOMRectReadOnly> Constructor( + const GlobalObject& aGlobal, double aX, double aY, double aWidth, + double aHeight); + + double X() const { return mX; } + double Y() const { return mY; } + double Width() const { return mWidth; } + double Height() const { return mHeight; } + + double Left() const { + double x = X(), w = Width(); + return NaNSafeMin(x, x + w); + } + double Top() const { + double y = Y(), h = Height(); + return NaNSafeMin(y, y + h); + } + double Right() const { + double x = X(), w = Width(); + return NaNSafeMax(x, x + w); + } + double Bottom() const { + double y = Y(), h = Height(); + return NaNSafeMax(y, y + h); + } + + bool WriteStructuredClone(JSContext* aCx, + JSStructuredCloneWriter* aWriter) const; + + static already_AddRefed<DOMRectReadOnly> ReadStructuredClone( + JSContext* aCx, nsIGlobalObject* aGlobal, + JSStructuredCloneReader* aReader); + + protected: + // Shared implementation of ReadStructuredClone for DOMRect and + // DOMRectReadOnly. + bool ReadStructuredClone(JSStructuredCloneReader* aReader); + + nsCOMPtr<nsISupports> mParent; + double mX, mY, mWidth, mHeight; +}; + +class DOMRect final : public DOMRectReadOnly { + public: + explicit DOMRect(nsISupports* aParent, double aX = 0, double aY = 0, + double aWidth = 0, double aHeight = 0) + : DOMRectReadOnly(aParent, aX, aY, aWidth, aHeight) {} + + NS_INLINE_DECL_REFCOUNTING_INHERITED(DOMRect, DOMRectReadOnly) + + static already_AddRefed<DOMRect> FromRect(const GlobalObject& aGlobal, + const DOMRectInit& aInit); + + static already_AddRefed<DOMRect> Constructor(const GlobalObject& aGlobal, + double aX, double aY, + double aWidth, double aHeight); + + virtual JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + static already_AddRefed<DOMRect> ReadStructuredClone( + JSContext* aCx, nsIGlobalObject* aGlobal, + JSStructuredCloneReader* aReader); + using DOMRectReadOnly::ReadStructuredClone; + + void SetRect(float aX, float aY, float aWidth, float aHeight) { + mX = aX; + mY = aY; + mWidth = aWidth; + mHeight = aHeight; + } + void SetLayoutRect(const nsRect& aLayoutRect); + + void SetX(double aX) { mX = aX; } + void SetY(double aY) { mY = aY; } + void SetWidth(double aWidth) { mWidth = aWidth; } + void SetHeight(double aHeight) { mHeight = aHeight; } + + static DOMRect* FromSupports(nsISupports* aSupports) { + return static_cast<DOMRect*>(aSupports); + } + + private: + ~DOMRect() = default; +}; + +class DOMRectList final : public nsISupports, public nsWrapperCache { + ~DOMRectList() = default; + + public: + explicit DOMRectList(nsISupports* aParent) : mParent(aParent) {} + + NS_DECL_CYCLE_COLLECTING_ISUPPORTS + NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(DOMRectList) + + virtual JSObject* WrapObject(JSContext* cx, + JS::Handle<JSObject*> aGivenProto) override; + + nsISupports* GetParentObject() { return mParent; } + + void Append(DOMRect* aElement) { mArray.AppendElement(aElement); } + + uint32_t Length() { return mArray.Length(); } + DOMRect* Item(uint32_t aIndex) { return mArray.SafeElementAt(aIndex); } + DOMRect* IndexedGetter(uint32_t aIndex, bool& aFound) { + aFound = aIndex < mArray.Length(); + if (!aFound) { + return nullptr; + } + return mArray[aIndex]; + } + + protected: + nsTArray<RefPtr<DOMRect> > mArray; + nsCOMPtr<nsISupports> mParent; +}; + +} // namespace mozilla::dom + +#endif /*MOZILLA_DOMRECT_H_*/ |