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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "mozilla/dom/DOMRect.h"
#include "nsPresContext.h"
#include "mozilla/dom/DOMRectListBinding.h"
#include "mozilla/dom/DOMRectBinding.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMRectReadOnly, mParent)
NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMRectReadOnly)
NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMRectReadOnly)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMRectReadOnly)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
JSObject*
DOMRectReadOnly::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
MOZ_ASSERT(mParent);
return DOMRectReadOnlyBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<DOMRectReadOnly>
DOMRectReadOnly::FromRect(const GlobalObject& aGlobal, const DOMRectInit& aInit)
{
RefPtr<DOMRectReadOnly> obj = new DOMRectReadOnly(
aGlobal.GetAsSupports(), aInit.mX, aInit.mY, aInit.mWidth, aInit.mHeight);
return obj.forget();
}
already_AddRefed<DOMRectReadOnly>
DOMRectReadOnly::Constructor(const GlobalObject& aGlobal, double aX, double aY,
double aWidth, double aHeight, ErrorResult& aRv)
{
RefPtr<DOMRectReadOnly> obj =
new DOMRectReadOnly(aGlobal.GetAsSupports(), aX, aY, aWidth, aHeight);
return obj.forget();
}
// https://drafts.fxtf.org/geometry/#structured-serialization
bool
DOMRectReadOnly::WriteStructuredClone(JSStructuredCloneWriter* aWriter) const
{
#define WriteDouble(d) \
JS_WriteUint32Pair(aWriter, (BitwiseCast<uint64_t>(d) >> 32) & 0xffffffff, \
BitwiseCast<uint64_t>(d) & 0xffffffff)
return WriteDouble(mX) && WriteDouble(mY) && WriteDouble(mWidth) &&
WriteDouble(mHeight);
#undef WriteDouble
}
bool
DOMRectReadOnly::ReadStructuredClone(JSStructuredCloneReader* aReader)
{
uint32_t high;
uint32_t low;
#define ReadDouble(d) \
if (!JS_ReadUint32Pair(aReader, &high, &low)) { \
return false; \
} \
(*(d) = BitwiseCast<double>(static_cast<uint64_t>(high) << 32 | low))
ReadDouble(&mX);
ReadDouble(&mY);
ReadDouble(&mWidth);
ReadDouble(&mHeight);
return true;
#undef ReadDouble
}
// -----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS_INHERITED(DOMRect, DOMRectReadOnly, nsIDOMClientRect)
#define FORWARD_GETTER(_name) \
NS_IMETHODIMP \
DOMRect::Get ## _name(float* aResult) \
{ \
*aResult = float(_name()); \
return NS_OK; \
}
FORWARD_GETTER(Left)
FORWARD_GETTER(Top)
FORWARD_GETTER(Right)
FORWARD_GETTER(Bottom)
FORWARD_GETTER(Width)
FORWARD_GETTER(Height)
JSObject*
DOMRect::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
MOZ_ASSERT(mParent);
return DOMRectBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<DOMRect>
DOMRect::FromRect(const GlobalObject& aGlobal, const DOMRectInit& aInit)
{
RefPtr<DOMRect> obj = new DOMRect(aGlobal.GetAsSupports(), aInit.mX, aInit.mY,
aInit.mWidth, aInit.mHeight);
return obj.forget();
}
already_AddRefed<DOMRect>
DOMRect::Constructor(const GlobalObject& aGlobal, double aX, double aY,
double aWidth, double aHeight, ErrorResult& aRv)
{
RefPtr<DOMRect> obj =
new DOMRect(aGlobal.GetAsSupports(), aX, aY, aWidth, aHeight);
return obj.forget();
}
// -----------------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMRectList, mParent, mArray)
NS_INTERFACE_TABLE_HEAD(DOMRectList)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE(DOMRectList, nsIDOMClientRectList)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(DOMRectList)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMRectList)
NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMRectList)
NS_IMETHODIMP
DOMRectList::GetLength(uint32_t* aLength)
{
*aLength = Length();
return NS_OK;
}
NS_IMETHODIMP
DOMRectList::Item(uint32_t aIndex, nsIDOMClientRect** aReturn)
{
NS_IF_ADDREF(*aReturn = Item(aIndex));
return NS_OK;
}
JSObject*
DOMRectList::WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto)
{
return mozilla::dom::DOMRectListBinding::Wrap(cx, this, aGivenProto);
}
static double
RoundFloat(double aValue)
{
return floor(aValue + 0.5);
}
void
DOMRect::SetLayoutRect(const nsRect& aLayoutRect)
{
double scale = 65536.0;
// Round to the nearest 1/scale units. We choose scale so it can be represented
// exactly by machine floating point.
double scaleInv = 1/scale;
double t2pScaled = scale/nsPresContext::AppUnitsPerCSSPixel();
double x = RoundFloat(aLayoutRect.x*t2pScaled)*scaleInv;
double y = RoundFloat(aLayoutRect.y*t2pScaled)*scaleInv;
SetRect(x, y, RoundFloat(aLayoutRect.XMost()*t2pScaled)*scaleInv - x,
RoundFloat(aLayoutRect.YMost()*t2pScaled)*scaleInv - y);
}
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