dom/events/ClipboardEvent.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 "mozilla/dom/ClipboardEvent.h"
   8 #include "mozilla/ContentEvents.h"
   9 #include "mozilla/ErrorResult.h"
  10 #include "mozilla/dom/DataTransfer.h"
  11 #include "nsIClipboard.h"
  12
  13 namespace mozilla::dom {
  14
  15 ClipboardEvent::ClipboardEvent(EventTarget* aOwner, nsPresContext* aPresContext,
  16                                InternalClipboardEvent* aEvent)
  17     : Event(aOwner, aPresContext,
  18             aEvent ? aEvent : new InternalClipboardEvent(false, eVoidEvent)) {
  19   if (aEvent) {
  20     mEventIsInternal = false;
  21   } else {
  22     mEventIsInternal = true;
  23   }
  24 }
  25
  26 void ClipboardEvent::InitClipboardEvent(const nsAString& aType, bool aCanBubble,
  27                                         bool aCancelable,
  28                                         DataTransfer* aClipboardData) {
  29   NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
  30
  31   Event::InitEvent(aType, aCanBubble, aCancelable);
  32   mEvent->AsClipboardEvent()->mClipboardData = aClipboardData;
  33 }
  34
  35 already_AddRefed<ClipboardEvent> ClipboardEvent::Constructor(
  36     const GlobalObject& aGlobal, const nsAString& aType,
  37     const ClipboardEventInit& aParam, ErrorResult& aRv) {
  38   nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
  39   RefPtr<ClipboardEvent> e = new ClipboardEvent(t, nullptr, nullptr);
  40   bool trusted = e->Init(t);
  41
  42   RefPtr<DataTransfer> clipboardData;
  43   if (e->mEventIsInternal) {
  44     InternalClipboardEvent* event = e->mEvent->AsClipboardEvent();
  45     if (event) {
  46       // Always create a clipboardData for the copy event. If this is changed to
  47       // support other types of events, make sure that read/write privileges are
  48       // checked properly within DataTransfer.
  49       clipboardData = new DataTransfer(ToSupports(e), eCopy, false, -1);
  50       clipboardData->SetData(aParam.mDataType, aParam.mData,
  51                              *aGlobal.GetSubjectPrincipal(), aRv);
  52       NS_ENSURE_TRUE(!aRv.Failed(), nullptr);
  53     }
  54   }
  55
  56   e->InitClipboardEvent(aType, aParam.mBubbles, aParam.mCancelable,
  57                         clipboardData);
  58   e->SetTrusted(trusted);
  59   e->SetComposed(aParam.mComposed);
  60   return e.forget();
  61 }
  62
  63 DataTransfer* ClipboardEvent::GetClipboardData() {
  64   InternalClipboardEvent* event = mEvent->AsClipboardEvent();
  65
  66   if (!event->mClipboardData) {
  67     if (mEventIsInternal) {
  68       event->mClipboardData =
  69           new DataTransfer(ToSupports(this), eCopy, false, -1);
  70     } else {
  71       event->mClipboardData = new DataTransfer(
  72           ToSupports(this), event->mMessage, event->mMessage == ePaste,
  73           nsIClipboard::kGlobalClipboard);
  74     }
  75   }
  76
  77   return event->mClipboardData;
  78 }
  79
  80 }  // namespace mozilla::dom
  81
  82 using namespace mozilla;
  83 using namespace mozilla::dom;
  84
  85 already_AddRefed<ClipboardEvent> NS_NewDOMClipboardEvent(
  86     EventTarget* aOwner, nsPresContext* aPresContext,
  87     InternalClipboardEvent* aEvent) {
  88   RefPtr<ClipboardEvent> it = new ClipboardEvent(aOwner, aPresContext, aEvent);
  89   return it.forget();
  90 }