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KeyboardEvent.cpp
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KeyboardEvent.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/KeyboardEvent.h"
#include "mozilla/TextEvents.h"
#include "prtime.h"
#include "KeyCodeConsensus.h"
#include "nsContentUtils.h"
namespace mozilla {
namespace dom {
static bool ResistFingerprinting() {
return nsContentUtils::ResistFingerprinting() &&
!nsContentUtils::IsCallerChrome();
}
KeyboardEvent::KeyboardEvent(EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetKeyboardEvent* aEvent)
: UIEvent(aOwner, aPresContext,
aEvent ? aEvent : new WidgetKeyboardEvent(false, 0, nullptr))
, mInitializedByCtor(false)
, mInitializedWhichValue(0)
{
if (aEvent) {
mEventIsInternal = false;
}
else {
mEventIsInternal = true;
mEvent->time = PR_Now();
mEvent->AsKeyboardEvent()->mKeyNameIndex = KEY_NAME_INDEX_USE_STRING;
}
createKeyCodes();
}
NS_IMPL_ADDREF_INHERITED(KeyboardEvent, UIEvent)
NS_IMPL_RELEASE_INHERITED(KeyboardEvent, UIEvent)
NS_INTERFACE_MAP_BEGIN(KeyboardEvent)
NS_INTERFACE_MAP_ENTRY(nsIDOMKeyEvent)
NS_INTERFACE_MAP_END_INHERITING(UIEvent)
bool
KeyboardEvent::AltKey()
{
return mEvent->AsKeyboardEvent()->IsAlt();
}
NS_IMETHODIMP
KeyboardEvent::GetAltKey(bool* aIsDown)
{
NS_ENSURE_ARG_POINTER(aIsDown);
*aIsDown = AltKey();
return NS_OK;
}
bool
KeyboardEvent::CtrlKey()
{
return mEvent->AsKeyboardEvent()->IsControl();
}
NS_IMETHODIMP
KeyboardEvent::GetCtrlKey(bool* aIsDown)
{
NS_ENSURE_ARG_POINTER(aIsDown);
*aIsDown = CtrlKey();
return NS_OK;
}
bool
KeyboardEvent::ShiftKey()
{
bool shiftState = mEvent->AsKeyboardEvent()->IsShift();
if (!ResistFingerprinting()) {
return shiftState;
}
// Find a consensus fake shift state for the given key name.
bool fakeShiftState;
nsString keyName;
GetKey(keyName);
bool exists = gShiftStates->Get(keyName, &fakeShiftState);
return exists ? fakeShiftState : shiftState;
}
NS_IMETHODIMP
KeyboardEvent::GetShiftKey(bool* aIsDown)
{
NS_ENSURE_ARG_POINTER(aIsDown);
*aIsDown = ShiftKey();
return NS_OK;
}
bool
KeyboardEvent::MetaKey()
{
return mEvent->AsKeyboardEvent()->IsMeta();
}
NS_IMETHODIMP
KeyboardEvent::GetMetaKey(bool* aIsDown)
{
NS_ENSURE_ARG_POINTER(aIsDown);
*aIsDown = MetaKey();
return NS_OK;
}
bool
KeyboardEvent::Repeat()
{
return mEvent->AsKeyboardEvent()->mIsRepeat;
}
NS_IMETHODIMP
KeyboardEvent::GetRepeat(bool* aIsRepeat)
{
NS_ENSURE_ARG_POINTER(aIsRepeat);
*aIsRepeat = Repeat();
return NS_OK;
}
bool
KeyboardEvent::IsComposing()
{
return mEvent->AsKeyboardEvent()->mIsComposing;
}
NS_IMETHODIMP
KeyboardEvent::GetModifierState(const nsAString& aKey,
bool* aState)
{
NS_ENSURE_ARG_POINTER(aState);
*aState = GetModifierState(aKey);
return NS_OK;
}
NS_IMETHODIMP
KeyboardEvent::GetKey(nsAString& aKeyName)
{
mEvent->AsKeyboardEvent()->GetDOMKeyName(aKeyName);
return NS_OK;
}
void
KeyboardEvent::GetCode(nsAString& aCodeName)
{
if (!ResistFingerprinting()) {
mEvent->AsKeyboardEvent()->GetDOMCodeName(aCodeName);
} else {
// Use a consensus code name corresponding to the
// key name.
nsString keyName, codeNameTemp;
GetKey(keyName);
if (gCodes->Get(keyName, &codeNameTemp)) {
aCodeName = codeNameTemp;
}
}
}
NS_IMETHODIMP
KeyboardEvent::GetCharCode(uint32_t* aCharCode)
{
NS_ENSURE_ARG_POINTER(aCharCode);
*aCharCode = CharCode();
return NS_OK;
}
uint32_t
KeyboardEvent::CharCode()
{
// If this event is initialized with ctor, we shouldn't check event type.
if (mInitializedByCtor) {
return mEvent->AsKeyboardEvent()->charCode;
}
switch (mEvent->message) {
case NS_KEY_BEFORE_DOWN:
case NS_KEY_DOWN:
case NS_KEY_AFTER_DOWN:
case NS_KEY_BEFORE_UP:
case NS_KEY_UP:
case NS_KEY_AFTER_UP:
// return 0;
case NS_KEY_PRESS:
return mEvent->AsKeyboardEvent()->charCode;
}
return 0;
}
NS_IMETHODIMP
KeyboardEvent::GetKeyCode(uint32_t* aKeyCode)
{
NS_ENSURE_ARG_POINTER(aKeyCode);
*aKeyCode = KeyCode();
return NS_OK;
}
uint32_t
KeyboardEvent::KeyCode()
{
// If this event is initialized with ctor, we shouldn't check event type.
if (mInitializedByCtor || mEvent->HasKeyEventMessage()) {
if (!ResistFingerprinting()) {
return mEvent->AsKeyboardEvent()->keyCode;
} else {
if (CharCode() != 0) {
return 0;
}
// Find a consensus key code for the given key name.
nsString keyName;
GetKey(keyName);
uint32_t keyCode;
return gKeyCodes->Get(keyName, &keyCode) ? keyCode : 0;
}
}
return 0;
}
uint32_t
KeyboardEvent::Which()
{
// If this event is initialized with ctor, which can have independent value.
if (mInitializedByCtor) {
return mInitializedWhichValue;
}
switch (mEvent->message) {
case NS_KEY_BEFORE_DOWN:
case NS_KEY_DOWN:
case NS_KEY_AFTER_DOWN:
case NS_KEY_BEFORE_UP:
case NS_KEY_UP:
case NS_KEY_AFTER_UP:
return KeyCode();
case NS_KEY_PRESS:
//Special case for 4xp bug 62878. Try to make value of which
//more closely mirror the values that 4.x gave for RETURN and BACKSPACE
{
uint32_t keyCode = KeyCode();
if (keyCode == NS_VK_RETURN || keyCode == NS_VK_BACK) {
return keyCode;
}
return CharCode();
}
}
return 0;
}
NS_IMETHODIMP
KeyboardEvent::GetLocation(uint32_t* aLocation)
{
NS_ENSURE_ARG_POINTER(aLocation);
*aLocation = Location();
return NS_OK;
}
uint32_t
KeyboardEvent::Location()
{
uint32_t location = mEvent->AsKeyboardEvent()->location;
if (!ResistFingerprinting()) {
return location;
}
// To resist fingerprinting, hide right modifier keys, as
// well as the numpad.
switch (location) {
case 0 : return 0;
case 1 : return 1;
case 2 : return 1;
case 3 : return 0;
default: return 0;
}
}
// static
already_AddRefed<KeyboardEvent>
KeyboardEvent::Constructor(const GlobalObject& aGlobal,
const nsAString& aType,
const KeyboardEventInit& aParam,
ErrorResult& aRv)
{
nsCOMPtr<EventTarget> target = do_QueryInterface(aGlobal.GetAsSupports());
nsRefPtr<KeyboardEvent> newEvent =
new KeyboardEvent(target, nullptr, nullptr);
newEvent->InitWithKeyboardEventInit(target, aType, aParam, aRv);
return newEvent.forget();
}
void
KeyboardEvent::InitWithKeyboardEventInit(EventTarget* aOwner,
const nsAString& aType,
const KeyboardEventInit& aParam,
ErrorResult& aRv)
{
bool trusted = Init(aOwner);
aRv = InitKeyEvent(aType, aParam.mBubbles, aParam.mCancelable,
aParam.mView, aParam.mCtrlKey, aParam.mAltKey,
aParam.mShiftKey, aParam.mMetaKey,
aParam.mKeyCode, aParam.mCharCode);
SetTrusted(trusted);
mDetail = aParam.mDetail;
mInitializedByCtor = true;
mInitializedWhichValue = aParam.mWhich;
WidgetKeyboardEvent* internalEvent = mEvent->AsKeyboardEvent();
internalEvent->location = aParam.mLocation;
internalEvent->mIsRepeat = aParam.mRepeat;
internalEvent->mIsComposing = aParam.mIsComposing;
internalEvent->mKeyNameIndex =
WidgetKeyboardEvent::GetKeyNameIndex(aParam.mKey);
if (internalEvent->mKeyNameIndex == KEY_NAME_INDEX_USE_STRING) {
internalEvent->mKeyValue = aParam.mKey;
}
internalEvent->mCodeNameIndex =
WidgetKeyboardEvent::GetCodeNameIndex(aParam.mCode);
if (internalEvent->mCodeNameIndex == CODE_NAME_INDEX_USE_STRING) {
internalEvent->mCodeValue = aParam.mCode;
}
}
NS_IMETHODIMP
KeyboardEvent::InitKeyEvent(const nsAString& aType,
bool aCanBubble,
bool aCancelable,
nsIDOMWindow* aView,
bool aCtrlKey,
bool aAltKey,
bool aShiftKey,
bool aMetaKey,
uint32_t aKeyCode,
uint32_t aCharCode)
{
nsresult rv = UIEvent::InitUIEvent(aType, aCanBubble, aCancelable, aView, 0);
NS_ENSURE_SUCCESS(rv, rv);
WidgetKeyboardEvent* keyEvent = mEvent->AsKeyboardEvent();
keyEvent->InitBasicModifiers(aCtrlKey, aAltKey, aShiftKey, aMetaKey);
keyEvent->keyCode = aKeyCode;
keyEvent->charCode = aCharCode;
return NS_OK;
}
} // namespace dom
} // namespace mozilla
using namespace mozilla;
using namespace mozilla::dom;
nsresult
NS_NewDOMKeyboardEvent(nsIDOMEvent** aInstancePtrResult,
EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetKeyboardEvent* aEvent)
{
KeyboardEvent* it = new KeyboardEvent(aOwner, aPresContext, aEvent);
NS_ADDREF(it);
*aInstancePtrResult = static_cast<Event*>(it);
return NS_OK;
}