summaryrefslogtreecommitdiffstats
path: root/dom/base/DOMRect.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'dom/base/DOMRect.cpp')
-rw-r--r--dom/base/DOMRect.cpp126
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);
+}