dom/events/InputEvent.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/InputEvent.h"
   8 #include "mozilla/TextEvents.h"
   9 #include "mozilla/StaticPrefs_dom.h"
  10 #include "prtime.h"
  11
  12 namespace mozilla::dom {
  13
  14 InputEvent::InputEvent(EventTarget* aOwner, nsPresContext* aPresContext,
  15                        InternalEditorInputEvent* aEvent)
  16     : UIEvent(aOwner, aPresContext,
  17               aEvent
  18                   ? aEvent
  19                   : new InternalEditorInputEvent(false, eVoidEvent, nullptr)) {
  20   NS_ASSERTION(mEvent->mClass == eEditorInputEventClass, "event type mismatch");
  21
  22   if (aEvent) {
  23     mEventIsInternal = false;
  24   } else {
  25     mEventIsInternal = true;
  26   }
  27 }
  28
  29 void InputEvent::GetData(nsAString& aData, CallerType aCallerType) {
  30   InternalEditorInputEvent* editorInputEvent = mEvent->AsEditorInputEvent();
  31   MOZ_ASSERT(editorInputEvent);
  32   // If clipboard event is disabled, user may not want to leak clipboard
  33   // information via DOM events.  If so, we should return empty string instead.
  34   if (mEvent->IsTrusted() && aCallerType != CallerType::System &&
  35       !StaticPrefs::dom_event_clipboardevents_enabled() &&
  36       ExposesClipboardDataOrDataTransfer(editorInputEvent->mInputType)) {
  37     aData = editorInputEvent->mData.IsVoid() ? VoidString() : u""_ns;
  38     return;
  39   }
  40   aData = editorInputEvent->mData;
  41 }
  42
  43 already_AddRefed<DataTransfer> InputEvent::GetDataTransfer(
  44     CallerType aCallerType) {
  45   InternalEditorInputEvent* editorInputEvent = mEvent->AsEditorInputEvent();
  46   MOZ_ASSERT(editorInputEvent);
  47   // If clipboard event is disabled, user may not want to leak clipboard
  48   // information via DOM events.  If so, we should return DataTransfer which
  49   // has empty string instead.  The reason why we make it have empty string is,
  50   // web apps may not expect that InputEvent.dataTransfer returns empty and
  51   // non-null DataTransfer instance.
  52   if (mEvent->IsTrusted() && aCallerType != CallerType::System &&
  53       !StaticPrefs::dom_event_clipboardevents_enabled() &&
  54       ExposesClipboardDataOrDataTransfer(editorInputEvent->mInputType)) {
  55     if (!editorInputEvent->mDataTransfer) {
  56       return nullptr;
  57     }
  58     return do_AddRef(
  59         new DataTransfer(editorInputEvent->mDataTransfer->GetParentObject(),
  60                          editorInputEvent->mMessage, u""_ns));
  61   }
  62   return do_AddRef(editorInputEvent->mDataTransfer);
  63 }
  64
  65 void InputEvent::GetInputType(nsAString& aInputType) {
  66   InternalEditorInputEvent* editorInputEvent = mEvent->AsEditorInputEvent();
  67   MOZ_ASSERT(editorInputEvent);
  68   if (editorInputEvent->mInputType == EditorInputType::eUnknown) {
  69     aInputType = mInputTypeValue;
  70   } else {
  71     editorInputEvent->GetDOMInputTypeName(aInputType);
  72   }
  73 }
  74
  75 void InputEvent::GetTargetRanges(nsTArray<RefPtr<StaticRange>>& aTargetRanges) {
  76   MOZ_ASSERT(aTargetRanges.IsEmpty());
  77   MOZ_ASSERT(mEvent->AsEditorInputEvent());
  78   aTargetRanges.AppendElements(mEvent->AsEditorInputEvent()->mTargetRanges);
  79 }
  80
  81 bool InputEvent::IsComposing() {
  82   return mEvent->AsEditorInputEvent()->mIsComposing;
  83 }
  84
  85 already_AddRefed<InputEvent> InputEvent::Constructor(
  86     const GlobalObject& aGlobal, const nsAString& aType,
  87     const InputEventInit& aParam) {
  88   nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
  89   RefPtr<InputEvent> e = new InputEvent(t, nullptr, nullptr);
  90   bool trusted = e->Init(t);
  91   e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
  92                  aParam.mDetail);
  93   InternalEditorInputEvent* internalEvent = e->mEvent->AsEditorInputEvent();
  94   internalEvent->mInputType =
  95       InternalEditorInputEvent::GetEditorInputType(aParam.mInputType);
  96   if (internalEvent->mInputType == EditorInputType::eUnknown) {
  97     e->mInputTypeValue = aParam.mInputType;
  98   }
  99   internalEvent->mData = aParam.mData;
 100   internalEvent->mDataTransfer = aParam.mDataTransfer;
 101   internalEvent->mTargetRanges = aParam.mTargetRanges;
 102   internalEvent->mIsComposing = aParam.mIsComposing;
 103   e->SetTrusted(trusted);
 104   e->SetComposed(aParam.mComposed);
 105   return e.forget();
 106 }
 107
 108 }  // namespace mozilla::dom
 109
 110 using namespace mozilla;
 111 using namespace mozilla::dom;
 112
 113 already_AddRefed<InputEvent> NS_NewDOMInputEvent(
 114     EventTarget* aOwner, nsPresContext* aPresContext,
 115     InternalEditorInputEvent* aEvent) {
 116   RefPtr<InputEvent> it = new InputEvent(aOwner, aPresContext, aEvent);
 117   return it.forget();
 118 }