import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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);
+}