summaryrefslogtreecommitdiffstats
path: root/dom/base/DOMRect.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--dom/base/DOMRect.cpp160
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);
+}