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: #include "mozilla/dom/DOMRect.h"
michael@0: 
michael@0: #include "nsPresContext.h"
michael@0: #include "mozilla/dom/DOMRectListBinding.h"
michael@0: #include "mozilla/dom/DOMRectBinding.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(DOMRectReadOnly, mParent)
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMRectReadOnly)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMRectReadOnly)
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMRectReadOnly)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0:   NS_INTERFACE_MAP_ENTRY(nsISupports)
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: JSObject*
michael@0: DOMRectReadOnly::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   MOZ_ASSERT(mParent);
michael@0:   return DOMRectReadOnlyBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: // -----------------------------------------------------------------------------
michael@0: 
michael@0: NS_IMPL_ISUPPORTS_INHERITED(DOMRect, DOMRectReadOnly, nsIDOMClientRect)
michael@0: 
michael@0: #define FORWARD_GETTER(_name)                                                   \
michael@0:   NS_IMETHODIMP                                                                 \
michael@0:   DOMRect::Get ## _name(float* aResult)                                         \
michael@0:   {                                                                             \
michael@0:     *aResult = float(_name());                                                  \
michael@0:     return NS_OK;                                                               \
michael@0:   }
michael@0: 
michael@0: FORWARD_GETTER(Left)
michael@0: FORWARD_GETTER(Top)
michael@0: FORWARD_GETTER(Right)
michael@0: FORWARD_GETTER(Bottom)
michael@0: FORWARD_GETTER(Width)
michael@0: FORWARD_GETTER(Height)
michael@0: 
michael@0: JSObject*
michael@0: DOMRect::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   MOZ_ASSERT(mParent);
michael@0:   return DOMRectBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: already_AddRefed<DOMRect>
michael@0: DOMRect::Constructor(const GlobalObject& aGlobal, ErrorResult& aRV)
michael@0: {
michael@0:   nsRefPtr<DOMRect> obj =
michael@0:     new DOMRect(aGlobal.GetAsSupports(), 0.0, 0.0, 0.0, 0.0);
michael@0:   return obj.forget();
michael@0: }
michael@0: 
michael@0: already_AddRefed<DOMRect>
michael@0: DOMRect::Constructor(const GlobalObject& aGlobal, double aX, double aY,
michael@0:                      double aWidth, double aHeight, ErrorResult& aRV)
michael@0: {
michael@0:   nsRefPtr<DOMRect> obj =
michael@0:     new DOMRect(aGlobal.GetAsSupports(), aX, aY, aWidth, aHeight);
michael@0:   return obj.forget();
michael@0: }
michael@0: 
michael@0: // -----------------------------------------------------------------------------
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(DOMRectList, mParent, mArray)
michael@0: 
michael@0: NS_INTERFACE_TABLE_HEAD(DOMRectList)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0:   NS_INTERFACE_TABLE(DOMRectList, nsIDOMClientRectList)
michael@0:   NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(DOMRectList)
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMRectList)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMRectList)
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: DOMRectList::GetLength(uint32_t* aLength)
michael@0: {
michael@0:   *aLength = Length();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP    
michael@0: DOMRectList::Item(uint32_t aIndex, nsIDOMClientRect** aReturn)
michael@0: {
michael@0:   NS_IF_ADDREF(*aReturn = Item(aIndex));
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: DOMRectList::WrapObject(JSContext *cx)
michael@0: {
michael@0:   return mozilla::dom::DOMRectListBinding::Wrap(cx, this);
michael@0: }
michael@0: 
michael@0: static double
michael@0: RoundFloat(double aValue)
michael@0: {
michael@0:   return floor(aValue + 0.5);
michael@0: }
michael@0: 
michael@0: void
michael@0: DOMRect::SetLayoutRect(const nsRect& aLayoutRect)
michael@0: {
michael@0:   double scale = 65536.0;
michael@0:   // Round to the nearest 1/scale units. We choose scale so it can be represented
michael@0:   // exactly by machine floating point.
michael@0:   double scaleInv = 1/scale;
michael@0:   double t2pScaled = scale/nsPresContext::AppUnitsPerCSSPixel();
michael@0:   double x = RoundFloat(aLayoutRect.x*t2pScaled)*scaleInv;
michael@0:   double y = RoundFloat(aLayoutRect.y*t2pScaled)*scaleInv;
michael@0:   SetRect(x, y, RoundFloat(aLayoutRect.XMost()*t2pScaled)*scaleInv - x,
michael@0:           RoundFloat(aLayoutRect.YMost()*t2pScaled)*scaleInv - y);
michael@0: }