michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef MOZILLA_DOMRECT_H_
michael@0: #define MOZILLA_DOMRECT_H_
michael@0: 
michael@0: #include "nsIDOMClientRect.h"
michael@0: #include "nsIDOMClientRectList.h"
michael@0: #include "nsTArray.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsWrapperCache.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "mozilla/dom/BindingDeclarations.h"
michael@0: #include "mozilla/ErrorResult.h"
michael@0: #include <algorithm>
michael@0: 
michael@0: struct nsRect;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class DOMRectReadOnly : public nsISupports
michael@0:                       , public nsWrapperCache
michael@0: {
michael@0: public:
michael@0:   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0:   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMRectReadOnly)
michael@0: 
michael@0:   virtual ~DOMRectReadOnly() {}
michael@0: 
michael@0:   DOMRectReadOnly(nsISupports* aParent)
michael@0:     : mParent(aParent)
michael@0:   {
michael@0:     SetIsDOMBinding();
michael@0:   }
michael@0: 
michael@0:   nsISupports* GetParentObject() const
michael@0:   {
michael@0:     MOZ_ASSERT(mParent);
michael@0:     return mParent;
michael@0:   }
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual double X() const = 0;
michael@0:   virtual double Y() const = 0;
michael@0:   virtual double Width() const = 0;
michael@0:   virtual double Height() const = 0;
michael@0: 
michael@0:   double Left() const
michael@0:   {
michael@0:     double x = X(), w = Width();
michael@0:     return std::min(x, x + w);
michael@0:   }
michael@0:   double Top() const
michael@0:   {
michael@0:     double y = Y(), h = Height();
michael@0:     return std::min(y, y + h);
michael@0:   }
michael@0:   double Right() const
michael@0:   {
michael@0:     double x = X(), w = Width();
michael@0:     return std::max(x, x + w);
michael@0:   }
michael@0:   double Bottom() const
michael@0:   {
michael@0:     double y = Y(), h = Height();
michael@0:     return std::max(y, y + h);
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsCOMPtr<nsISupports> mParent;
michael@0: };
michael@0: 
michael@0: class DOMRect MOZ_FINAL : public DOMRectReadOnly
michael@0:                         , public nsIDOMClientRect
michael@0: {
michael@0: public:
michael@0:   DOMRect(nsISupports* aParent, double aX = 0, double aY = 0,
michael@0:           double aWidth = 0, double aHeight = 0)
michael@0:     : DOMRectReadOnly(aParent)
michael@0:     , mX(aX)
michael@0:     , mY(aY)
michael@0:     , mWidth(aWidth)
michael@0:     , mHeight(aHeight)
michael@0:   {
michael@0:   }
michael@0:   
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0:   NS_DECL_NSIDOMCLIENTRECT
michael@0: 
michael@0:   static already_AddRefed<DOMRect>
michael@0:   Constructor(const GlobalObject& aGlobal, ErrorResult& aRV);
michael@0:   static already_AddRefed<DOMRect>
michael@0:   Constructor(const GlobalObject& aGlobal, double aX, double aY,
michael@0:               double aWidth, double aHeight, ErrorResult& aRV);
michael@0: 
michael@0:   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
michael@0: 
michael@0:   void SetRect(float aX, float aY, float aWidth, float aHeight) {
michael@0:     mX = aX; mY = aY; mWidth = aWidth; mHeight = aHeight;
michael@0:   }
michael@0:   void SetLayoutRect(const nsRect& aLayoutRect);
michael@0: 
michael@0:   virtual double X() const MOZ_OVERRIDE
michael@0:   {
michael@0:     return mX;
michael@0:   }
michael@0:   virtual double Y() const MOZ_OVERRIDE
michael@0:   {
michael@0:     return mY;
michael@0:   }
michael@0:   virtual double Width() const MOZ_OVERRIDE
michael@0:   {
michael@0:     return mWidth;
michael@0:   }
michael@0:   virtual double Height() const MOZ_OVERRIDE
michael@0:   {
michael@0:     return mHeight;
michael@0:   }
michael@0: 
michael@0:   void SetX(double aX)
michael@0:   {
michael@0:     mX = aX;
michael@0:   }
michael@0:   void SetY(double aY)
michael@0:   {
michael@0:     mY = aY;
michael@0:   }
michael@0:   void SetWidth(double aWidth)
michael@0:   {
michael@0:     mWidth = aWidth;
michael@0:   }
michael@0:   void SetHeight(double aHeight)
michael@0:   {
michael@0:     mHeight = aHeight;
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   double mX, mY, mWidth, mHeight;
michael@0: };
michael@0: 
michael@0: class DOMRectList MOZ_FINAL : public nsIDOMClientRectList,
michael@0:                               public nsWrapperCache
michael@0: {
michael@0: public:
michael@0:   DOMRectList(nsISupports *aParent) : mParent(aParent)
michael@0:   {
michael@0:     SetIsDOMBinding();
michael@0:   }
michael@0: 
michael@0:   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0:   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMRectList)
michael@0: 
michael@0:   NS_DECL_NSIDOMCLIENTRECTLIST
michael@0:   
michael@0:   virtual JSObject* WrapObject(JSContext *cx) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsISupports* GetParentObject()
michael@0:   {
michael@0:     return mParent;
michael@0:   }
michael@0: 
michael@0:   void Append(DOMRect* aElement) { mArray.AppendElement(aElement); }
michael@0: 
michael@0:   static DOMRectList* FromSupports(nsISupports* aSupports)
michael@0:   {
michael@0: #ifdef DEBUG
michael@0:     {
michael@0:       nsCOMPtr<nsIDOMClientRectList> list_qi = do_QueryInterface(aSupports);
michael@0: 
michael@0:       // If this assertion fires the QI implementation for the object in
michael@0:       // question doesn't use the nsIDOMClientRectList pointer as the nsISupports
michael@0:       // pointer. That must be fixed, or we'll crash...
michael@0:       NS_ASSERTION(list_qi == static_cast<nsIDOMClientRectList*>(aSupports),
michael@0:                    "Uh, fix QI!");
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     return static_cast<DOMRectList*>(aSupports);
michael@0:   }
michael@0: 
michael@0:   uint32_t Length()
michael@0:   {
michael@0:     return mArray.Length();
michael@0:   }
michael@0:   DOMRect* Item(uint32_t aIndex)
michael@0:   {
michael@0:     return mArray.SafeElementAt(aIndex);
michael@0:   }
michael@0:   DOMRect* IndexedGetter(uint32_t aIndex, bool& aFound)
michael@0:   {
michael@0:     aFound = aIndex < mArray.Length();
michael@0:     if (!aFound) {
michael@0:       return nullptr;
michael@0:     }
michael@0:     return mArray[aIndex];
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsTArray<nsRefPtr<DOMRect> > mArray;
michael@0:   nsCOMPtr<nsISupports> mParent;
michael@0: };
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif /*MOZILLA_DOMRECT_H_*/