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     mEvent->mTime = PR_Now();
  27   }
  28 }
  29
  30 void InputEvent::GetData(nsAString& aData, CallerType aCallerType) {
  31   InternalEditorInputEvent* editorInputEvent = mEvent->AsEditorInputEvent();
  32   MOZ_ASSERT(editorInputEvent);
  33   // If clipboard event is disabled, user may not want to leak clipboard
  34   // information via DOM events.  If so, we should return empty string instead.
  35   if (mEvent->IsTrusted() && aCallerType != CallerType::System &&
  36       !StaticPrefs::dom_event_clipboardevents_enabled() &&
  37       ExposesClipboardDataOrDataTransfer(editorInputEvent->mInputType)) {
  38     aData = editorInputEvent->mData.IsVoid() ? VoidString() : u""_ns;
  39     return;
  40   }
  41   aData = editorInputEvent->mData;
  42 }
  43
  44 already_AddRefed<DataTransfer> InputEvent::GetDataTransfer(
  45     CallerType aCallerType) {
  46   InternalEditorInputEvent* editorInputEvent = mEvent->AsEditorInputEvent();
  47   MOZ_ASSERT(editorInputEvent);
  48   // If clipboard event is disabled, user may not want to leak clipboard
  49   // information via DOM events.  If so, we should return DataTransfer which
  50   // has empty string instead.  The reason why we make it have empty string is,
  51   // web apps may not expect that InputEvent.dataTransfer returns empty and
  52   // non-null DataTransfer instance.
  53   if (mEvent->IsTrusted() && aCallerType != CallerType::System &&
  54       !StaticPrefs::dom_event_clipboardevents_enabled() &&
  55       ExposesClipboardDataOrDataTransfer(editorInputEvent->mInputType)) {
  56     if (!editorInputEvent->mDataTransfer) {
  57       return nullptr;
  58     }
  59     return do_AddRef(
  60         new DataTransfer(editorInputEvent->mDataTransfer->GetParentObject(),
  61                          editorInputEvent->mMessage, u""_ns));
  62   }
  63   return do_AddRef(editorInputEvent->mDataTransfer);
  64 }
  65
  66 void InputEvent::GetInputType(nsAString& aInputType) {
  67   InternalEditorInputEvent* editorInputEvent = mEvent->AsEditorInputEvent();
  68   MOZ_ASSERT(editorInputEvent);
  69   if (editorInputEvent->mInputType == EditorInputType::eUnknown) {
  70     aInputType = mInputTypeValue;
  71   } else {
  72     editorInputEvent->GetDOMInputTypeName(aInputType);
  73   }
  74 }
  75
  76 void InputEvent::GetTargetRanges(nsTArray<RefPtr<StaticRange>>& aTargetRanges) {
  77   MOZ_ASSERT(aTargetRanges.IsEmpty());
  78   MOZ_ASSERT(mEvent->AsEditorInputEvent());
  79   aTargetRanges.AppendElements(mEvent->AsEditorInputEvent()->mTargetRanges);
  80 }
  81
  82 bool InputEvent::IsComposing() {
  83   return mEvent->AsEditorInputEvent()->mIsComposing;
  84 }
  85
  86 already_AddRefed<InputEvent> InputEvent::Constructor(
  87     const GlobalObject& aGlobal, const nsAString& aType,
  88     const InputEventInit& aParam) {
  89   nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
  90   RefPtr<InputEvent> e = new InputEvent(t, nullptr, nullptr);
  91   bool trusted = e->Init(t);
  92   e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
  93                  aParam.mDetail);
  94   InternalEditorInputEvent* internalEvent = e->mEvent->AsEditorInputEvent();
  95   internalEvent->mInputType =
  96       InternalEditorInputEvent::GetEditorInputType(aParam.mInputType);
  97   if (internalEvent->mInputType == EditorInputType::eUnknown) {
  98     e->mInputTypeValue = aParam.mInputType;
  99   }
 100   internalEvent->mData = aParam.mData;
 101   internalEvent->mDataTransfer = aParam.mDataTransfer;
 102   internalEvent->mTargetRanges = aParam.mTargetRanges;
 103   internalEvent->mIsComposing = aParam.mIsComposing;
 104   e->SetTrusted(trusted);
 105   e->SetComposed(aParam.mComposed);
 106   return e.forget();
 107 }
 108
 109 }  // namespace mozilla::dom
 110
 111 using namespace mozilla;
 112 using namespace mozilla::dom;
 113
 114 already_AddRefed<InputEvent> NS_NewDOMInputEvent(
 115     EventTarget* aOwner, nsPresContext* aPresContext,
 116     InternalEditorInputEvent* aEvent) {
 117   RefPtr<InputEvent> it = new InputEvent(aOwner, aPresContext, aEvent);
 118   return it.forget();
 119 }