1 files changed, 160 insertions, 0 deletions
diff --git a/dom/base/DOMRect.cpp b/dom/base/DOMRect.cpp
new file mode 100644
index 0000000000..d7ed164ec5
--- /dev/null
+++ b/dom/base/DOMRect.cpp
@@ -0,0 +1,160 @@
+/* -*- 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);
+}