dom/nfc/MozNDEFRecord.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   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 /* Copyright © 2013 Deutsche Telekom, Inc. */
   8
   9 #include "MozNDEFRecord.h"
  10 #include "mozilla/dom/MozNDEFRecordBinding.h"
  11 #include "mozilla/HoldDropJSObjects.h"
  12 #include "nsContentUtils.h"
  13
  14
  15 namespace mozilla {
  16 namespace dom {
  17
  18
  19 NS_IMPL_CYCLE_COLLECTION_CLASS(MozNDEFRecord)
  20
  21 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(MozNDEFRecord)
  22   NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
  23   NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
  24   tmp->DropData();
  25 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  26
  27 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(MozNDEFRecord)
  28   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
  29   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
  30 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  31
  32 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(MozNDEFRecord)
  33   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mType)
  34   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mId)
  35   NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mPayload)
  36   NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
  37 NS_IMPL_CYCLE_COLLECTION_TRACE_END
  38
  39 NS_IMPL_CYCLE_COLLECTING_ADDREF(MozNDEFRecord)
  40 NS_IMPL_CYCLE_COLLECTING_RELEASE(MozNDEFRecord)
  41 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MozNDEFRecord)
  42   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  43   NS_INTERFACE_MAP_ENTRY(nsISupports)
  44 NS_INTERFACE_MAP_END
  45
  46 void
  47 MozNDEFRecord::HoldData()
  48 {
  49   mozilla::HoldJSObjects(this);
  50 }
  51
  52 void
  53 MozNDEFRecord::DropData()
  54 {
  55   if (mType) {
  56     mType = nullptr;
  57   }
  58   if (mId) {
  59     mId = nullptr;
  60   }
  61   if (mPayload) {
  62     mPayload = nullptr;
  63   }
  64   mozilla::DropJSObjects(this);
  65 }
  66
  67 /* static */
  68 already_AddRefed<MozNDEFRecord>
  69 MozNDEFRecord::Constructor(const GlobalObject& aGlobal,
  70                            uint8_t aTnf,
  71                            const Optional<Uint8Array>& aType,
  72                            const Optional<Uint8Array>& aId,
  73                            const Optional<Uint8Array>& aPayload,
  74                            ErrorResult& aRv)
  75 {
  76   nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(aGlobal.GetAsSupports());
  77   if (!win) {
  78     aRv.Throw(NS_ERROR_FAILURE);
  79     return nullptr;
  80   }
  81
  82   nsRefPtr<MozNDEFRecord> ndefrecord = new MozNDEFRecord(aGlobal.Context(),
  83                                                          win, aTnf, aType, aId,
  84                                                          aPayload);
  85   if (!ndefrecord) {
  86     aRv.Throw(NS_ERROR_FAILURE);
  87     return nullptr;
  88   }
  89   return ndefrecord.forget();
  90 }
  91
  92 MozNDEFRecord::MozNDEFRecord(JSContext* aCx, nsPIDOMWindow* aWindow,
  93                              uint8_t aTnf,
  94                              const Optional<Uint8Array>& aType,
  95                              const Optional<Uint8Array>& aId,
  96                              const Optional<Uint8Array>& aPayload)
  97   : mTnf(aTnf)
  98 {
  99   mWindow = aWindow; // For GetParentObject()
 100
 101   if (aType.WasPassed()) {
 102     aType.Value().ComputeLengthAndData();
 103     mType = Uint8Array::Create(aCx, this, aType.Value().Length(), aType.Value().Data());
 104   }
 105
 106   if (aId.WasPassed()) {
 107     aId.Value().ComputeLengthAndData();
 108     mId = Uint8Array::Create(aCx, this, aId.Value().Length(), aId.Value().Data());
 109   }
 110
 111   if (aPayload.WasPassed()) {
 112     aPayload.Value().ComputeLengthAndData();
 113     mPayload = Uint8Array::Create(aCx, this, aPayload.Value().Length(), aPayload.Value().Data());
 114   }
 115
 116   SetIsDOMBinding();
 117   HoldData();
 118 }
 119
 120 MozNDEFRecord::~MozNDEFRecord()
 121 {
 122   DropData();
 123 }
 124
 125 JSObject*
 126 MozNDEFRecord::WrapObject(JSContext* aCx)
 127 {
 128   return MozNDEFRecordBinding::Wrap(aCx, this);
 129 }
 130
 131 } // namespace dom
 132 } // namespace mozilla