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-rw-r--r--dom/base/DOMRect.h215
1 files changed, 215 insertions, 0 deletions
diff --git a/dom/base/DOMRect.h b/dom/base/DOMRect.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 MOZILLA_DOMRECT_H_
+#define MOZILLA_DOMRECT_H_
+
+#include "nsIDOMClientRect.h"
+#include "nsIDOMClientRectList.h"
+#include "nsTArray.h"
+#include "nsCOMPtr.h"
+#include "nsWrapperCache.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/ErrorResult.h"
+#include <algorithm>
+
+struct nsRect;
+
+namespace mozilla {
+namespace dom {
+
+class DOMRectReadOnly : public nsISupports
+ , public nsWrapperCache
+{
+protected:
+ virtual ~DOMRectReadOnly() {}
+
+public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMRectReadOnly)
+
+ explicit DOMRectReadOnly(nsISupports* aParent)
+ : mParent(aParent)
+ {
+ }
+
+ nsISupports* GetParentObject() const
+ {
+ MOZ_ASSERT(mParent);
+ return mParent;
+ }
+ virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+ virtual double X() const = 0;
+ virtual double Y() const = 0;
+ virtual double Width() const = 0;
+ virtual double Height() const = 0;
+
+ double Left() const
+ {
+ double x = X(), w = Width();
+ return std::min(x, x + w);
+ }
+ double Top() const
+ {
+ double y = Y(), h = Height();
+ return std::min(y, y + h);
+ }
+ double Right() const
+ {
+ double x = X(), w = Width();
+ return std::max(x, x + w);
+ }
+ double Bottom() const
+ {
+ double y = Y(), h = Height();
+ return std::max(y, y + h);
+ }
+
+protected:
+ nsCOMPtr<nsISupports> mParent;
+};
+
+class DOMRect final : public DOMRectReadOnly
+ , public nsIDOMClientRect
+{
+public:
+ explicit DOMRect(nsISupports* aParent, double aX = 0, double aY = 0,
+ double aWidth = 0, double aHeight = 0)
+ : DOMRectReadOnly(aParent)
+ , mX(aX)
+ , mY(aY)
+ , mWidth(aWidth)
+ , mHeight(aHeight)
+ {
+ }
+
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_DECL_NSIDOMCLIENTRECT
+
+ static already_AddRefed<DOMRect>
+ Constructor(const GlobalObject& aGlobal, ErrorResult& aRV);
+ static already_AddRefed<DOMRect>
+ Constructor(const GlobalObject& aGlobal, double aX, double aY,
+ double aWidth, double aHeight, ErrorResult& aRV);
+
+ virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+ void SetRect(float aX, float aY, float aWidth, float aHeight) {
+ mX = aX; mY = aY; mWidth = aWidth; mHeight = aHeight;
+ }
+ void SetLayoutRect(const nsRect& aLayoutRect);
+
+ virtual double X() const override
+ {
+ return mX;
+ }
+ virtual double Y() const override
+ {
+ return mY;
+ }
+ virtual double Width() const override
+ {
+ return mWidth;
+ }
+ virtual double Height() const override
+ {
+ return mHeight;
+ }
+
+ void SetX(double aX)
+ {
+ mX = aX;
+ }
+ void SetY(double aY)
+ {
+ mY = aY;
+ }
+ void SetWidth(double aWidth)
+ {
+ mWidth = aWidth;
+ }
+ void SetHeight(double aHeight)
+ {
+ mHeight = aHeight;
+ }
+
+protected:
+ double mX, mY, mWidth, mHeight;
+
+private:
+ ~DOMRect() {};
+};
+
+class DOMRectList final : public nsIDOMClientRectList,
+ public nsWrapperCache
+{
+ ~DOMRectList() {}
+
+public:
+ explicit DOMRectList(nsISupports *aParent) : mParent(aParent)
+ {
+ }
+
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMRectList)
+
+ NS_DECL_NSIDOMCLIENTRECTLIST
+
+ virtual JSObject* WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override;
+
+ nsISupports* GetParentObject()
+ {
+ return mParent;
+ }
+
+ void Append(DOMRect* aElement) { mArray.AppendElement(aElement); }
+
+ static DOMRectList* FromSupports(nsISupports* aSupports)
+ {
+#ifdef DEBUG
+ {
+ nsCOMPtr<nsIDOMClientRectList> list_qi = do_QueryInterface(aSupports);
+
+ // If this assertion fires the QI implementation for the object in
+ // question doesn't use the nsIDOMClientRectList pointer as the nsISupports
+ // pointer. That must be fixed, or we'll crash...
+ NS_ASSERTION(list_qi == static_cast<nsIDOMClientRectList*>(aSupports),
+ "Uh, fix QI!");
+ }
+#endif
+
+ return static_cast<DOMRectList*>(aSupports);
+ }
+
+ 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 dom
+} // namespace mozilla
+
+#endif /*MOZILLA_DOMRECT_H_*/