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     mEvent->mTime = PR_Now();
  24   }
  25 }
  26
  27 void ClipboardEvent::InitClipboardEvent(const nsAString& aType, bool aCanBubble,
  28                                         bool aCancelable,
  29                                         DataTransfer* aClipboardData) {
  30   NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched);
  31
  32   Event::InitEvent(aType, aCanBubble, aCancelable);
  33   mEvent->AsClipboardEvent()->mClipboardData = aClipboardData;
  34 }
  35
  36 already_AddRefed<ClipboardEvent> ClipboardEvent::Constructor(
  37     const GlobalObject& aGlobal, const nsAString& aType,
  38     const ClipboardEventInit& aParam, ErrorResult& aRv) {
  39   nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
  40   RefPtr<ClipboardEvent> e = new ClipboardEvent(t, nullptr, nullptr);
  41   bool trusted = e->Init(t);
  42
  43   RefPtr<DataTransfer> clipboardData;
  44   if (e->mEventIsInternal) {
  45     InternalClipboardEvent* event = e->mEvent->AsClipboardEvent();
  46     if (event) {
  47       // Always create a clipboardData for the copy event. If this is changed to
  48       // support other types of events, make sure that read/write privileges are
  49       // checked properly within DataTransfer.
  50       clipboardData = new DataTransfer(ToSupports(e), eCopy, false, -1);
  51       clipboardData->SetData(aParam.mDataType, aParam.mData,
  52                              *aGlobal.GetSubjectPrincipal(), aRv);
  53       NS_ENSURE_TRUE(!aRv.Failed(), nullptr);
  54     }
  55   }
  56
  57   e->InitClipboardEvent(aType, aParam.mBubbles, aParam.mCancelable,
  58                         clipboardData);
  59   e->SetTrusted(trusted);
  60   e->SetComposed(aParam.mComposed);
  61   return e.forget();
  62 }
  63
  64 DataTransfer* ClipboardEvent::GetClipboardData() {
  65   InternalClipboardEvent* event = mEvent->AsClipboardEvent();
  66
  67   if (!event->mClipboardData) {
  68     if (mEventIsInternal) {
  69       event->mClipboardData =
  70           new DataTransfer(ToSupports(this), eCopy, false, -1);
  71     } else {
  72       event->mClipboardData = new DataTransfer(
  73           ToSupports(this), event->mMessage, event->mMessage == ePaste,
  74           nsIClipboard::kGlobalClipboard);
  75     }
  76   }
  77
  78   return event->mClipboardData;
  79 }
  80
  81 }  // namespace mozilla::dom
  82
  83 using namespace mozilla;
  84 using namespace mozilla::dom;
  85
  86 already_AddRefed<ClipboardEvent> NS_NewDOMClipboardEvent(
  87     EventTarget* aOwner, nsPresContext* aPresContext,
  88     InternalClipboardEvent* aEvent) {
  89   RefPtr<ClipboardEvent> it = new ClipboardEvent(aOwner, aPresContext, aEvent);
  90   return it.forget();
  91 }