diff options
Diffstat (limited to 'dom/base/DOMRect.cpp')
| -rw-r--r-- | dom/base/DOMRect.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/dom/base/DOMRect.cpp b/dom/base/DOMRect.cpp new file mode 100644 index 000000000..2c44c6a07 --- /dev/null +++ b/dom/base/DOMRect.cpp @@ -0,0 +1,126 @@ +/* -*- 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 "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); +} + +// ----------------------------------------------------------------------------- + +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::Constructor(const GlobalObject& aGlobal, ErrorResult& aRV) +{ + RefPtr<DOMRect> obj = + new DOMRect(aGlobal.GetAsSupports(), 0.0, 0.0, 0.0, 0.0); + 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); +} |