dom/base/nsDOMCaretPosition.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsDOMCaretPosition.h"
   8
   9 #include "mozilla/dom/CaretPositionBinding.h"
  10 #include "mozilla/dom/DOMRect.h"
  11 #include "mozilla/ErrorResult.h"
  12 #include "nsRange.h"
  13
  14 using namespace mozilla::dom;
  15
  16 nsDOMCaretPosition::nsDOMCaretPosition(nsINode* aNode, uint32_t aOffset)
  17     : mOffset(aOffset), mOffsetNode(aNode), mAnonymousContentNode(nullptr) {}
  18
  19 nsDOMCaretPosition::~nsDOMCaretPosition() = default;
  20
  21 nsINode* nsDOMCaretPosition::GetOffsetNode() const { return mOffsetNode; }
  22
  23 already_AddRefed<DOMRect> nsDOMCaretPosition::GetClientRect() const {
  24   if (!mOffsetNode) {
  25     return nullptr;
  26   }
  27
  28   nsCOMPtr<nsINode> node;
  29   if (mAnonymousContentNode) {
  30     node = mAnonymousContentNode;
  31   } else {
  32     node = mOffsetNode;
  33   }
  34
  35   RefPtr<nsRange> range =
  36       nsRange::Create(node, mOffset, node, mOffset, mozilla::IgnoreErrors());
  37   if (!range) {
  38     return nullptr;
  39   }
  40   RefPtr<DOMRect> rect = range->GetBoundingClientRect(false);
  41   return rect.forget();
  42 }
  43
  44 JSObject* nsDOMCaretPosition::WrapObject(JSContext* aCx,
  45                                          JS::Handle<JSObject*> aGivenProto) {
  46   return mozilla::dom::CaretPosition_Binding::Wrap(aCx, this, aGivenProto);
  47 }
  48
  49 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsDOMCaretPosition, mOffsetNode,
  50                                       mAnonymousContentNode)
  51
  52 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCaretPosition)
  53 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCaretPosition)
  54
  55 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCaretPosition)
  56   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  57   NS_INTERFACE_MAP_ENTRY(nsISupports)
  58 NS_INTERFACE_MAP_END