dom/events/TextEvent.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/BasePrincipal.h"  // for nsIPrincipal::IsSystemPrincipal()
   8 #include "mozilla/EventForwards.h"
   9 #include "mozilla/TextEvents.h"
  10 #include "mozilla/dom/DataTransfer.h"
  11 #include "mozilla/dom/TextEvent.h"
  12 #include "nsGlobalWindowInner.h"
  13 #include "nsIPrincipal.h"
  14 #include "nsPresContext.h"
  15
  16 namespace mozilla::dom {
  17
  18 TextEvent::TextEvent(EventTarget* aOwner, nsPresContext* aPresContext,
  19                      InternalLegacyTextEvent* aEvent)
  20     : UIEvent(aOwner, aPresContext,
  21               aEvent
  22                   ? aEvent
  23                   : new InternalLegacyTextEvent(false, eVoidEvent, nullptr)) {
  24   NS_ASSERTION(mEvent->mClass == eLegacyTextEventClass, "event type mismatch");
  25   mEventIsInternal = !aEvent;
  26 }
  27
  28 void TextEvent::InitTextEvent(const nsAString& typeArg, bool canBubbleArg,
  29                               bool cancelableArg, nsGlobalWindowInner* viewArg,
  30                               const nsAString& dataArg) {
  31   if (NS_WARN_IF(mEvent->mFlags.mIsBeingDispatched)) {
  32     return;
  33   }
  34
  35   UIEvent::InitUIEvent(typeArg, canBubbleArg, cancelableArg, viewArg, 0);
  36
  37   static_cast<InternalLegacyTextEvent*>(mEvent)->mData = dataArg;
  38 }
  39
  40 void TextEvent::GetData(nsAString& aData,
  41                         nsIPrincipal& aSubjectPrincipal) const {
  42   InternalLegacyTextEvent* textEvent = mEvent->AsLegacyTextEvent();
  43   MOZ_ASSERT(textEvent);
  44   if (mEvent->IsTrusted() && !aSubjectPrincipal.IsSystemPrincipal() &&
  45       !StaticPrefs::dom_event_clipboardevents_enabled() &&
  46       ExposesClipboardDataOrDataTransfer(textEvent->mInputType)) {
  47     aData.Truncate();
  48     return;
  49   }
  50   if (!textEvent->mDataTransfer) {
  51     aData = textEvent->mData;
  52     return;
  53   }
  54   textEvent->mDataTransfer->GetData(u"text/plain"_ns, aData, aSubjectPrincipal,
  55                                     IgnoreErrors());
  56 }
  57
  58 }  // namespace mozilla::dom
  59
  60 using namespace mozilla;
  61 using namespace mozilla::dom;
  62
  63 already_AddRefed<TextEvent> NS_NewDOMTextEvent(
  64     EventTarget* aOwner, nsPresContext* aPresContext,
  65     InternalLegacyTextEvent* aEvent) {
  66   RefPtr<TextEvent> it = new TextEvent(aOwner, aPresContext, aEvent);
  67   return it.forget();
  68 }