michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsDOMCaretPosition.h"
michael@0: 
michael@0: #include "mozilla/dom/CaretPositionBinding.h"
michael@0: #include "mozilla/dom/DOMRect.h"
michael@0: #include "nsRange.h"
michael@0: 
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: nsDOMCaretPosition::nsDOMCaretPosition(nsINode* aNode, uint32_t aOffset)
michael@0:   : mOffset(aOffset), mOffsetNode(aNode), mAnonymousContentNode(nullptr)
michael@0: {
michael@0:   SetIsDOMBinding();
michael@0: }
michael@0: 
michael@0: nsDOMCaretPosition::~nsDOMCaretPosition()
michael@0: {
michael@0: }
michael@0: 
michael@0: nsINode* nsDOMCaretPosition::GetOffsetNode() const
michael@0: {
michael@0:   return mOffsetNode;
michael@0: }
michael@0: 
michael@0: already_AddRefed<DOMRect>
michael@0: nsDOMCaretPosition::GetClientRect() const
michael@0: {
michael@0:   if (!mOffsetNode) {
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   nsRefPtr<DOMRect> rect;
michael@0:   nsRefPtr<nsRange> domRange;
michael@0:   nsCOMPtr<nsINode> node;
michael@0: 
michael@0:   if (mAnonymousContentNode) {
michael@0:     node = mAnonymousContentNode;
michael@0:   } else {
michael@0:     node = mOffsetNode;
michael@0:   }
michael@0: 
michael@0:   nsresult creationRv = nsRange::CreateRange(node, mOffset, node,
michael@0:                                              mOffset,
michael@0:                                              getter_AddRefs<nsRange>(domRange));
michael@0:   if (!NS_SUCCEEDED(creationRv)) {
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   NS_ASSERTION(domRange, "unable to retrieve valid dom range from CaretPosition");
michael@0: 
michael@0:   rect = domRange->GetBoundingClientRect();
michael@0: 
michael@0:   return rect.forget();
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: nsDOMCaretPosition::WrapObject(JSContext *aCx)
michael@0: {
michael@0:   return mozilla::dom::CaretPositionBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(nsDOMCaretPosition,
michael@0:                                         mOffsetNode, mAnonymousContentNode)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCaretPosition)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCaretPosition)
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCaretPosition)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0:   NS_INTERFACE_MAP_ENTRY(nsISupports)
michael@0: NS_INTERFACE_MAP_END
michael@0: