gecko/dom/events/nsDOMUIEvent.cpp

511 lines
14 KiB
C++

/* -*- 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 "base/basictypes.h"
#include "ipc/IPCMessageUtils.h"
#include "nsCOMPtr.h"
#include "nsDOMUIEvent.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIDOMWindow.h"
#include "nsIDOMNode.h"
#include "nsIContent.h"
#include "nsContentUtils.h"
#include "nsEventStateManager.h"
#include "nsIFrame.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/TextEvents.h"
#include "prtime.h"
using namespace mozilla;
nsDOMUIEvent::nsDOMUIEvent(mozilla::dom::EventTarget* aOwner,
nsPresContext* aPresContext, WidgetGUIEvent* aEvent)
: nsDOMEvent(aOwner, aPresContext,
aEvent ? aEvent : new InternalUIEvent(false, 0))
, mClientPoint(0, 0), mLayerPoint(0, 0), mPagePoint(0, 0), mMovementPoint(0, 0)
, mIsPointerLocked(nsEventStateManager::sIsPointerLocked)
, mLastClientPoint(nsEventStateManager::sLastClientPoint)
{
if (aEvent) {
mEventIsInternal = false;
}
else {
mEventIsInternal = true;
mEvent->time = PR_Now();
}
// Fill mDetail and mView according to the mEvent (widget-generated
// event) we've got
switch(mEvent->eventStructType)
{
case NS_UI_EVENT:
{
mDetail = mEvent->AsUIEvent()->detail;
break;
}
case NS_SCROLLPORT_EVENT:
{
InternalScrollPortEvent* scrollEvent = mEvent->AsScrollPortEvent();
mDetail = (int32_t)scrollEvent->orient;
break;
}
default:
mDetail = 0;
break;
}
mView = nullptr;
if (mPresContext)
{
nsISupports* container = mPresContext->GetContainerWeak();
if (container)
{
nsCOMPtr<nsIDOMWindow> window = do_GetInterface(container);
if (window)
mView = do_QueryInterface(window);
}
}
}
//static
already_AddRefed<nsDOMUIEvent>
nsDOMUIEvent::Constructor(const mozilla::dom::GlobalObject& aGlobal,
const nsAString& aType,
const mozilla::dom::UIEventInit& aParam,
mozilla::ErrorResult& aRv)
{
nsCOMPtr<mozilla::dom::EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
nsRefPtr<nsDOMUIEvent> e = new nsDOMUIEvent(t, nullptr, nullptr);
bool trusted = e->Init(t);
aRv = e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
aParam.mDetail);
e->SetTrusted(trusted);
return e.forget();
}
NS_IMPL_CYCLE_COLLECTION_INHERITED_1(nsDOMUIEvent, nsDOMEvent,
mView)
NS_IMPL_ADDREF_INHERITED(nsDOMUIEvent, nsDOMEvent)
NS_IMPL_RELEASE_INHERITED(nsDOMUIEvent, nsDOMEvent)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsDOMUIEvent)
NS_INTERFACE_MAP_ENTRY(nsIDOMUIEvent)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEvent)
static nsIntPoint
DevPixelsToCSSPixels(const LayoutDeviceIntPoint& aPoint,
nsPresContext* aContext)
{
return nsIntPoint(aContext->DevPixelsToIntCSSPixels(aPoint.x),
aContext->DevPixelsToIntCSSPixels(aPoint.y));
}
nsIntPoint
nsDOMUIEvent::GetMovementPoint()
{
if (mPrivateDataDuplicated) {
return mMovementPoint;
}
if (!mEvent ||
(mEvent->eventStructType != NS_MOUSE_EVENT &&
mEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
mEvent->eventStructType != NS_WHEEL_EVENT &&
mEvent->eventStructType != NS_DRAG_EVENT &&
mEvent->eventStructType != NS_POINTER_EVENT &&
mEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT) ||
!mEvent->AsGUIEvent()->widget) {
return nsIntPoint(0, 0);
}
// Calculate the delta between the last screen point and the current one.
nsIntPoint current = DevPixelsToCSSPixels(mEvent->refPoint, mPresContext);
nsIntPoint last = DevPixelsToCSSPixels(mEvent->lastRefPoint, mPresContext);
return current - last;
}
NS_IMETHODIMP
nsDOMUIEvent::GetView(nsIDOMWindow** aView)
{
*aView = mView;
NS_IF_ADDREF(*aView);
return NS_OK;
}
NS_IMETHODIMP
nsDOMUIEvent::GetDetail(int32_t* aDetail)
{
*aDetail = mDetail;
return NS_OK;
}
NS_IMETHODIMP
nsDOMUIEvent::InitUIEvent(const nsAString& typeArg,
bool canBubbleArg,
bool cancelableArg,
nsIDOMWindow* viewArg,
int32_t detailArg)
{
if (viewArg) {
nsCOMPtr<nsPIDOMWindow> view = do_QueryInterface(viewArg);
NS_ENSURE_TRUE(view, NS_ERROR_INVALID_ARG);
}
nsresult rv = nsDOMEvent::InitEvent(typeArg, canBubbleArg, cancelableArg);
NS_ENSURE_SUCCESS(rv, rv);
mDetail = detailArg;
mView = viewArg;
return NS_OK;
}
// ---- nsDOMNSUIEvent implementation -------------------
NS_IMETHODIMP
nsDOMUIEvent::GetPageX(int32_t* aPageX)
{
NS_ENSURE_ARG_POINTER(aPageX);
*aPageX = PageX();
return NS_OK;
}
int32_t
nsDOMUIEvent::PageX() const
{
if (mPrivateDataDuplicated) {
return mPagePoint.x;
}
return nsDOMEvent::GetPageCoords(mPresContext,
mEvent,
mEvent->refPoint,
mClientPoint).x;
}
NS_IMETHODIMP
nsDOMUIEvent::GetPageY(int32_t* aPageY)
{
NS_ENSURE_ARG_POINTER(aPageY);
*aPageY = PageY();
return NS_OK;
}
int32_t
nsDOMUIEvent::PageY() const
{
if (mPrivateDataDuplicated) {
return mPagePoint.y;
}
return nsDOMEvent::GetPageCoords(mPresContext,
mEvent,
mEvent->refPoint,
mClientPoint).y;
}
NS_IMETHODIMP
nsDOMUIEvent::GetWhich(uint32_t* aWhich)
{
NS_ENSURE_ARG_POINTER(aWhich);
*aWhich = Which();
return NS_OK;
}
already_AddRefed<nsINode>
nsDOMUIEvent::GetRangeParent()
{
nsIFrame* targetFrame = nullptr;
if (mPresContext) {
targetFrame = mPresContext->EventStateManager()->GetEventTarget();
}
if (targetFrame) {
nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent,
targetFrame);
nsCOMPtr<nsIContent> parent = targetFrame->GetContentOffsetsFromPoint(pt).content;
if (parent) {
if (parent->ChromeOnlyAccess() &&
!nsContentUtils::CanAccessNativeAnon()) {
return nullptr;
}
return parent.forget();
}
}
return nullptr;
}
NS_IMETHODIMP
nsDOMUIEvent::GetRangeParent(nsIDOMNode** aRangeParent)
{
NS_ENSURE_ARG_POINTER(aRangeParent);
*aRangeParent = nullptr;
nsCOMPtr<nsINode> n = GetRangeParent();
if (n) {
CallQueryInterface(n, aRangeParent);
}
return NS_OK;
}
NS_IMETHODIMP
nsDOMUIEvent::GetRangeOffset(int32_t* aRangeOffset)
{
NS_ENSURE_ARG_POINTER(aRangeOffset);
*aRangeOffset = RangeOffset();
return NS_OK;
}
int32_t
nsDOMUIEvent::RangeOffset() const
{
if (!mPresContext) {
return 0;
}
nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget();
if (!targetFrame) {
return 0;
}
nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent,
targetFrame);
return targetFrame->GetContentOffsetsFromPoint(pt).offset;
}
NS_IMETHODIMP
nsDOMUIEvent::GetCancelBubble(bool* aCancelBubble)
{
NS_ENSURE_ARG_POINTER(aCancelBubble);
*aCancelBubble = CancelBubble();
return NS_OK;
}
NS_IMETHODIMP
nsDOMUIEvent::SetCancelBubble(bool aCancelBubble)
{
mEvent->mFlags.mPropagationStopped = aCancelBubble;
return NS_OK;
}
nsIntPoint
nsDOMUIEvent::GetLayerPoint() const
{
if (!mEvent ||
(mEvent->eventStructType != NS_MOUSE_EVENT &&
mEvent->eventStructType != NS_MOUSE_SCROLL_EVENT &&
mEvent->eventStructType != NS_WHEEL_EVENT &&
mEvent->eventStructType != NS_POINTER_EVENT &&
mEvent->eventStructType != NS_TOUCH_EVENT &&
mEvent->eventStructType != NS_DRAG_EVENT &&
mEvent->eventStructType != NS_SIMPLE_GESTURE_EVENT) ||
!mPresContext ||
mEventIsInternal) {
return mLayerPoint;
}
// XXX I'm not really sure this is correct; it's my best shot, though
nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget();
if (!targetFrame)
return mLayerPoint;
nsIFrame* layer = nsLayoutUtils::GetClosestLayer(targetFrame);
nsPoint pt(nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent, layer));
return nsIntPoint(nsPresContext::AppUnitsToIntCSSPixels(pt.x),
nsPresContext::AppUnitsToIntCSSPixels(pt.y));
}
NS_IMETHODIMP
nsDOMUIEvent::GetLayerX(int32_t* aLayerX)
{
NS_ENSURE_ARG_POINTER(aLayerX);
*aLayerX = GetLayerPoint().x;
return NS_OK;
}
NS_IMETHODIMP
nsDOMUIEvent::GetLayerY(int32_t* aLayerY)
{
NS_ENSURE_ARG_POINTER(aLayerY);
*aLayerY = GetLayerPoint().y;
return NS_OK;
}
NS_IMETHODIMP
nsDOMUIEvent::GetIsChar(bool* aIsChar)
{
*aIsChar = IsChar();
return NS_OK;
}
bool
nsDOMUIEvent::IsChar() const
{
WidgetKeyboardEvent* keyEvent = mEvent->AsKeyboardEvent();
if (keyEvent) {
return keyEvent->isChar;
}
WidgetTextEvent* textEvent = mEvent->AsTextEvent();
return textEvent ? textEvent->isChar : false;
}
NS_IMETHODIMP
nsDOMUIEvent::DuplicatePrivateData()
{
mClientPoint = nsDOMEvent::GetClientCoords(mPresContext,
mEvent,
mEvent->refPoint,
mClientPoint);
mMovementPoint = GetMovementPoint();
mLayerPoint = GetLayerPoint();
mPagePoint = nsDOMEvent::GetPageCoords(mPresContext,
mEvent,
mEvent->refPoint,
mClientPoint);
// GetScreenPoint converts mEvent->refPoint to right coordinates.
nsIntPoint screenPoint = nsDOMEvent::GetScreenCoords(mPresContext,
mEvent,
mEvent->refPoint);
nsresult rv = nsDOMEvent::DuplicatePrivateData();
if (NS_SUCCEEDED(rv)) {
mEvent->refPoint = LayoutDeviceIntPoint::FromUntyped(screenPoint);
}
return rv;
}
NS_IMETHODIMP_(void)
nsDOMUIEvent::Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType)
{
if (aSerializeInterfaceType) {
IPC::WriteParam(aMsg, NS_LITERAL_STRING("uievent"));
}
nsDOMEvent::Serialize(aMsg, false);
int32_t detail = 0;
GetDetail(&detail);
IPC::WriteParam(aMsg, detail);
}
NS_IMETHODIMP_(bool)
nsDOMUIEvent::Deserialize(const IPC::Message* aMsg, void** aIter)
{
NS_ENSURE_TRUE(nsDOMEvent::Deserialize(aMsg, aIter), false);
NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &mDetail), false);
return true;
}
// XXX Following struct and array are used only in
// nsDOMUIEvent::ComputeModifierState(), but if we define them in it,
// we fail to build on Mac at calling mozilla::ArrayLength().
struct nsModifierPair
{
mozilla::Modifier modifier;
const char* name;
};
static const nsModifierPair kPairs[] = {
{ MODIFIER_ALT, NS_DOM_KEYNAME_ALT },
{ MODIFIER_ALTGRAPH, NS_DOM_KEYNAME_ALTGRAPH },
{ MODIFIER_CAPSLOCK, NS_DOM_KEYNAME_CAPSLOCK },
{ MODIFIER_CONTROL, NS_DOM_KEYNAME_CONTROL },
{ MODIFIER_FN, NS_DOM_KEYNAME_FN },
{ MODIFIER_META, NS_DOM_KEYNAME_META },
{ MODIFIER_NUMLOCK, NS_DOM_KEYNAME_NUMLOCK },
{ MODIFIER_SCROLLLOCK, NS_DOM_KEYNAME_SCROLLLOCK },
{ MODIFIER_SHIFT, NS_DOM_KEYNAME_SHIFT },
{ MODIFIER_SYMBOLLOCK, NS_DOM_KEYNAME_SYMBOLLOCK },
{ MODIFIER_OS, NS_DOM_KEYNAME_OS }
};
/* static */
mozilla::Modifiers
nsDOMUIEvent::ComputeModifierState(const nsAString& aModifiersList)
{
if (aModifiersList.IsEmpty()) {
return 0;
}
// Be careful about the performance. If aModifiersList is too long,
// parsing it needs too long time.
// XXX Should we abort if aModifiersList is too long?
Modifiers modifiers = 0;
nsAString::const_iterator listStart, listEnd;
aModifiersList.BeginReading(listStart);
aModifiersList.EndReading(listEnd);
for (uint32_t i = 0; i < mozilla::ArrayLength(kPairs); i++) {
nsAString::const_iterator start(listStart), end(listEnd);
if (!FindInReadable(NS_ConvertASCIItoUTF16(kPairs[i].name), start, end)) {
continue;
}
if ((start != listStart && !NS_IsAsciiWhitespace(*(--start))) ||
(end != listEnd && !NS_IsAsciiWhitespace(*(end)))) {
continue;
}
modifiers |= kPairs[i].modifier;
}
return modifiers;
}
bool
nsDOMUIEvent::GetModifierStateInternal(const nsAString& aKey)
{
WidgetInputEvent* inputEvent = mEvent->AsInputEvent();
MOZ_ASSERT(inputEvent, "mEvent must be WidgetInputEvent or derived class");
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_SHIFT)) {
return inputEvent->IsShift();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_CONTROL)) {
return inputEvent->IsControl();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_META)) {
return inputEvent->IsMeta();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_ALT)) {
return inputEvent->IsAlt();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_ALTGRAPH)) {
return inputEvent->IsAltGraph();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_OS)) {
return inputEvent->IsOS();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_CAPSLOCK)) {
return inputEvent->IsCapsLocked();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_NUMLOCK)) {
return inputEvent->IsNumLocked();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_FN)) {
return inputEvent->IsFn();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_SCROLLLOCK)) {
return inputEvent->IsScrollLocked();
}
if (aKey.EqualsLiteral(NS_DOM_KEYNAME_SYMBOLLOCK)) {
return inputEvent->IsSymbolLocked();
}
return false;
}
nsresult NS_NewDOMUIEvent(nsIDOMEvent** aInstancePtrResult,
mozilla::dom::EventTarget* aOwner,
nsPresContext* aPresContext,
WidgetGUIEvent* aEvent)
{
nsDOMUIEvent* it = new nsDOMUIEvent(aOwner, aPresContext, aEvent);
return CallQueryInterface(it, aInstancePtrResult);
}