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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/. */
#include "mozilla/dom/DOMRect.h"
#include <cmath>
#include "js/StructuredClone.h"
#include "mozilla/AppUnits.h"
#include "mozilla/Casting.h"
#include "mozilla/MacroForEach.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/DOMRectBinding.h"
#include "mozilla/dom/DOMRectListBinding.h"
#include "nsIGlobalObject.h"
#include "nsRect.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 DOMRectReadOnly_Binding::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) {
RefPtr<DOMRectReadOnly> obj =
new DOMRectReadOnly(aGlobal.GetAsSupports(), aX, aY, aWidth, aHeight);
return obj.forget();
}
// https://drafts.fxtf.org/geometry/#structured-serialization
bool DOMRectReadOnly::WriteStructuredClone(
JSContext* aCx, 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
}
// static
already_AddRefed<DOMRectReadOnly> DOMRectReadOnly::ReadStructuredClone(
JSContext* aCx, nsIGlobalObject* aGlobal,
JSStructuredCloneReader* aReader) {
RefPtr<DOMRectReadOnly> retval = new DOMRectReadOnly(aGlobal);
if (!retval->ReadStructuredClone(aReader)) {
return nullptr;
}
return retval.forget();
}
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
}
// -----------------------------------------------------------------------------
JSObject* DOMRect::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
MOZ_ASSERT(mParent);
return DOMRect_Binding::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) {
RefPtr<DOMRect> obj =
new DOMRect(aGlobal.GetAsSupports(), aX, aY, aWidth, aHeight);
return obj.forget();
}
// static
already_AddRefed<DOMRect> DOMRect::ReadStructuredClone(
JSContext* aCx, nsIGlobalObject* aGlobal,
JSStructuredCloneReader* aReader) {
RefPtr<DOMRect> retval = new DOMRect(aGlobal);
if (!retval->ReadStructuredClone(aReader)) {
return nullptr;
}
return retval.forget();
}
// -----------------------------------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DOMRectList, mParent, mArray)
NS_INTERFACE_TABLE_HEAD(DOMRectList)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE0(DOMRectList)
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)
JSObject* DOMRectList::WrapObject(JSContext* cx,
JS::Handle<JSObject*> aGivenProto) {
return mozilla::dom::DOMRectList_Binding::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 / 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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