зеркало из https://github.com/mozilla/gecko-dev.git
515 строки
14 KiB
C++
515 строки
14 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "base/basictypes.h"
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#include "ipc/IPCMessageUtils.h"
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#include "mozilla/dom/UIEvent.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/ContentEvents.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/TextEvents.h"
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#include "nsCOMPtr.h"
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#include "nsContentUtils.h"
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#include "nsIContent.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIDocShell.h"
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#include "nsIDOMWindow.h"
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#include "nsIDOMNode.h"
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#include "nsIFrame.h"
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#include "prtime.h"
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namespace mozilla {
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namespace dom {
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UIEvent::UIEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetGUIEvent* aEvent)
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: Event(aOwner, aPresContext,
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aEvent ? aEvent : new InternalUIEvent(false, eVoidEvent, nullptr))
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, mClientPoint(0, 0)
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, mLayerPoint(0, 0)
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, mPagePoint(0, 0)
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, mMovementPoint(0, 0)
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, mIsPointerLocked(EventStateManager::sIsPointerLocked)
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, mLastClientPoint(EventStateManager::sLastClientPoint)
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{
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if (aEvent) {
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mEventIsInternal = false;
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}
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else {
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mEventIsInternal = true;
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mEvent->mTime = PR_Now();
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}
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// Fill mDetail and mView according to the mEvent (widget-generated
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// event) we've got
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switch(mEvent->mClass) {
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case eUIEventClass:
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{
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mDetail = mEvent->AsUIEvent()->mDetail;
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break;
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}
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case eScrollPortEventClass:
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{
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InternalScrollPortEvent* scrollEvent = mEvent->AsScrollPortEvent();
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mDetail = static_cast<int32_t>(scrollEvent->mOrient);
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break;
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}
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default:
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mDetail = 0;
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break;
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}
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mView = nullptr;
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if (mPresContext)
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{
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nsIDocShell* docShell = mPresContext->GetDocShell();
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if (docShell)
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{
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mView = docShell->GetWindow();
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}
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}
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}
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// static
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already_AddRefed<UIEvent>
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UIEvent::Constructor(const GlobalObject& aGlobal,
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const nsAString& aType,
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const UIEventInit& aParam,
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ErrorResult& aRv)
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{
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nsCOMPtr<EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports());
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RefPtr<UIEvent> e = new UIEvent(t, nullptr, nullptr);
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bool trusted = e->Init(t);
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e->InitUIEvent(aType, aParam.mBubbles, aParam.mCancelable, aParam.mView,
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aParam.mDetail);
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e->SetTrusted(trusted);
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e->SetComposed(aParam.mComposed);
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return e.forget();
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(UIEvent, Event,
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mView)
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NS_IMPL_ADDREF_INHERITED(UIEvent, Event)
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NS_IMPL_RELEASE_INHERITED(UIEvent, Event)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(UIEvent)
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NS_INTERFACE_MAP_ENTRY(nsIDOMUIEvent)
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NS_INTERFACE_MAP_END_INHERITING(Event)
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static nsIntPoint
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DevPixelsToCSSPixels(const LayoutDeviceIntPoint& aPoint,
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nsPresContext* aContext)
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{
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return nsIntPoint(aContext->DevPixelsToIntCSSPixels(aPoint.x),
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aContext->DevPixelsToIntCSSPixels(aPoint.y));
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}
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nsIntPoint
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UIEvent::GetMovementPoint()
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{
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if (mEvent->mFlags.mIsPositionless) {
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return nsIntPoint(0, 0);
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}
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if (mPrivateDataDuplicated || mEventIsInternal) {
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return mMovementPoint;
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}
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if (!mEvent ||
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(mEvent->mClass != eMouseEventClass &&
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mEvent->mClass != eMouseScrollEventClass &&
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mEvent->mClass != eWheelEventClass &&
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mEvent->mClass != eDragEventClass &&
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mEvent->mClass != ePointerEventClass &&
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mEvent->mClass != eSimpleGestureEventClass) ||
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!mEvent->AsGUIEvent()->mWidget) {
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return nsIntPoint(0, 0);
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}
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// Calculate the delta between the last screen point and the current one.
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nsIntPoint current = DevPixelsToCSSPixels(mEvent->mRefPoint, mPresContext);
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nsIntPoint last = DevPixelsToCSSPixels(mEvent->mLastRefPoint, mPresContext);
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return current - last;
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}
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NS_IMETHODIMP
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UIEvent::GetView(mozIDOMWindowProxy** aView)
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{
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*aView = mView;
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NS_IF_ADDREF(*aView);
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return NS_OK;
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}
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NS_IMETHODIMP
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UIEvent::GetDetail(int32_t* aDetail)
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{
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*aDetail = mDetail;
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return NS_OK;
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}
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void
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UIEvent::InitUIEvent(const nsAString& typeArg,
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bool canBubbleArg,
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bool cancelableArg,
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nsGlobalWindow* viewArg,
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int32_t detailArg)
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{
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auto* view = viewArg ? viewArg->AsInner() : nullptr;
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InitUIEvent(typeArg, canBubbleArg, cancelableArg, view, detailArg);
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}
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NS_IMETHODIMP
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UIEvent::InitUIEvent(const nsAString& typeArg,
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bool canBubbleArg,
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bool cancelableArg,
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mozIDOMWindow* viewArg,
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int32_t detailArg)
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{
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NS_ENSURE_TRUE(!mEvent->mFlags.mIsBeingDispatched, NS_OK);
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Event::InitEvent(typeArg, canBubbleArg, cancelableArg);
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mDetail = detailArg;
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mView = viewArg ? nsPIDOMWindowInner::From(viewArg)->GetOuterWindow() :
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nullptr;
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return NS_OK;
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}
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NS_IMETHODIMP
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UIEvent::GetPageX(int32_t* aPageX)
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{
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NS_ENSURE_ARG_POINTER(aPageX);
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*aPageX = PageX();
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return NS_OK;
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}
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int32_t
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UIEvent::PageX() const
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{
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if (mEvent->mFlags.mIsPositionless) {
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return 0;
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}
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if (mPrivateDataDuplicated) {
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return mPagePoint.x;
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}
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return Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint,
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mClientPoint).x;
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}
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NS_IMETHODIMP
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UIEvent::GetPageY(int32_t* aPageY)
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{
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NS_ENSURE_ARG_POINTER(aPageY);
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*aPageY = PageY();
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return NS_OK;
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}
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int32_t
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UIEvent::PageY() const
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{
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if (mEvent->mFlags.mIsPositionless) {
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return 0;
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}
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if (mPrivateDataDuplicated) {
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return mPagePoint.y;
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}
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return Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint,
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mClientPoint).y;
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}
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NS_IMETHODIMP
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UIEvent::GetWhich(uint32_t* aWhich)
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{
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NS_ENSURE_ARG_POINTER(aWhich);
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*aWhich = Which();
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return NS_OK;
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}
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already_AddRefed<nsINode>
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UIEvent::GetRangeParent()
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{
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nsIFrame* targetFrame = nullptr;
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if (mPresContext) {
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targetFrame = mPresContext->EventStateManager()->GetEventTarget();
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}
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if (targetFrame) {
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nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent,
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targetFrame);
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nsCOMPtr<nsIContent> parent = targetFrame->GetContentOffsetsFromPoint(pt).content;
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if (parent) {
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if (parent->ChromeOnlyAccess() &&
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!nsContentUtils::CanAccessNativeAnon()) {
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return nullptr;
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}
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return parent.forget();
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}
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}
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return nullptr;
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}
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NS_IMETHODIMP
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UIEvent::GetRangeParent(nsIDOMNode** aRangeParent)
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{
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NS_ENSURE_ARG_POINTER(aRangeParent);
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*aRangeParent = nullptr;
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nsCOMPtr<nsINode> n = GetRangeParent();
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if (n) {
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CallQueryInterface(n, aRangeParent);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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UIEvent::GetRangeOffset(int32_t* aRangeOffset)
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{
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NS_ENSURE_ARG_POINTER(aRangeOffset);
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*aRangeOffset = RangeOffset();
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return NS_OK;
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}
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int32_t
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UIEvent::RangeOffset() const
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{
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if (!mPresContext) {
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return 0;
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}
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nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget();
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if (!targetFrame) {
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return 0;
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}
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nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent,
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targetFrame);
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return targetFrame->GetContentOffsetsFromPoint(pt).offset;
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}
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nsIntPoint
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UIEvent::GetLayerPoint() const
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{
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if (mEvent->mFlags.mIsPositionless) {
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return nsIntPoint(0, 0);
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}
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if (!mEvent ||
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(mEvent->mClass != eMouseEventClass &&
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mEvent->mClass != eMouseScrollEventClass &&
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mEvent->mClass != eWheelEventClass &&
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mEvent->mClass != ePointerEventClass &&
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mEvent->mClass != eTouchEventClass &&
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mEvent->mClass != eDragEventClass &&
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mEvent->mClass != eSimpleGestureEventClass) ||
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!mPresContext ||
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mEventIsInternal) {
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return mLayerPoint;
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}
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// XXX I'm not really sure this is correct; it's my best shot, though
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nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget();
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if (!targetFrame)
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return mLayerPoint;
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nsIFrame* layer = nsLayoutUtils::GetClosestLayer(targetFrame);
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nsPoint pt(nsLayoutUtils::GetEventCoordinatesRelativeTo(mEvent, layer));
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return nsIntPoint(nsPresContext::AppUnitsToIntCSSPixels(pt.x),
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nsPresContext::AppUnitsToIntCSSPixels(pt.y));
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}
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NS_IMETHODIMP
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UIEvent::GetLayerX(int32_t* aLayerX)
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{
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NS_ENSURE_ARG_POINTER(aLayerX);
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*aLayerX = GetLayerPoint().x;
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return NS_OK;
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}
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NS_IMETHODIMP
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UIEvent::GetLayerY(int32_t* aLayerY)
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{
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NS_ENSURE_ARG_POINTER(aLayerY);
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*aLayerY = GetLayerPoint().y;
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return NS_OK;
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}
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mozilla::dom::Event*
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UIEvent::AsEvent(void)
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{
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return this;
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}
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NS_IMETHODIMP
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UIEvent::DuplicatePrivateData()
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{
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mClientPoint =
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Event::GetClientCoords(mPresContext, mEvent, mEvent->mRefPoint,
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mClientPoint);
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mMovementPoint = GetMovementPoint();
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mLayerPoint = GetLayerPoint();
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mPagePoint =
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Event::GetPageCoords(mPresContext, mEvent, mEvent->mRefPoint, mClientPoint);
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// GetScreenPoint converts mEvent->mRefPoint to right coordinates.
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CSSIntPoint screenPoint =
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Event::GetScreenCoords(mPresContext, mEvent, mEvent->mRefPoint);
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nsresult rv = Event::DuplicatePrivateData();
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if (NS_SUCCEEDED(rv)) {
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CSSToLayoutDeviceScale scale = mPresContext ? mPresContext->CSSToDevPixelScale()
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: CSSToLayoutDeviceScale(1);
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mEvent->mRefPoint = RoundedToInt(screenPoint * scale);
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}
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return rv;
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}
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NS_IMETHODIMP_(void)
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UIEvent::Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType)
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{
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if (aSerializeInterfaceType) {
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IPC::WriteParam(aMsg, NS_LITERAL_STRING("uievent"));
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}
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Event::Serialize(aMsg, false);
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int32_t detail = 0;
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GetDetail(&detail);
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IPC::WriteParam(aMsg, detail);
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}
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NS_IMETHODIMP_(bool)
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UIEvent::Deserialize(const IPC::Message* aMsg, PickleIterator* aIter)
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{
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NS_ENSURE_TRUE(Event::Deserialize(aMsg, aIter), false);
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NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &mDetail), false);
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return true;
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}
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// XXX Following struct and array are used only in
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// UIEvent::ComputeModifierState(), but if we define them in it,
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// we fail to build on Mac at calling mozilla::ArrayLength().
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struct ModifierPair
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{
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Modifier modifier;
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const char* name;
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};
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static const ModifierPair kPairs[] = {
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{ MODIFIER_ALT, NS_DOM_KEYNAME_ALT },
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{ MODIFIER_ALTGRAPH, NS_DOM_KEYNAME_ALTGRAPH },
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{ MODIFIER_CAPSLOCK, NS_DOM_KEYNAME_CAPSLOCK },
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{ MODIFIER_CONTROL, NS_DOM_KEYNAME_CONTROL },
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{ MODIFIER_FN, NS_DOM_KEYNAME_FN },
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{ MODIFIER_FNLOCK, NS_DOM_KEYNAME_FNLOCK },
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{ MODIFIER_META, NS_DOM_KEYNAME_META },
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{ MODIFIER_NUMLOCK, NS_DOM_KEYNAME_NUMLOCK },
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{ MODIFIER_SCROLLLOCK, NS_DOM_KEYNAME_SCROLLLOCK },
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{ MODIFIER_SHIFT, NS_DOM_KEYNAME_SHIFT },
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{ MODIFIER_SYMBOL, NS_DOM_KEYNAME_SYMBOL },
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{ MODIFIER_SYMBOLLOCK, NS_DOM_KEYNAME_SYMBOLLOCK },
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{ MODIFIER_OS, NS_DOM_KEYNAME_OS }
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};
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// static
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Modifiers
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UIEvent::ComputeModifierState(const nsAString& aModifiersList)
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{
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if (aModifiersList.IsEmpty()) {
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return 0;
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}
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// Be careful about the performance. If aModifiersList is too long,
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// parsing it needs too long time.
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// XXX Should we abort if aModifiersList is too long?
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Modifiers modifiers = 0;
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nsAString::const_iterator listStart, listEnd;
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aModifiersList.BeginReading(listStart);
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aModifiersList.EndReading(listEnd);
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for (uint32_t i = 0; i < ArrayLength(kPairs); i++) {
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nsAString::const_iterator start(listStart), end(listEnd);
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if (!FindInReadable(NS_ConvertASCIItoUTF16(kPairs[i].name), start, end)) {
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continue;
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}
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if ((start != listStart && !NS_IsAsciiWhitespace(*(--start))) ||
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(end != listEnd && !NS_IsAsciiWhitespace(*(end)))) {
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continue;
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}
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modifiers |= kPairs[i].modifier;
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}
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return modifiers;
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}
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bool
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UIEvent::GetModifierStateInternal(const nsAString& aKey)
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{
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WidgetInputEvent* inputEvent = mEvent->AsInputEvent();
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MOZ_ASSERT(inputEvent, "mEvent must be WidgetInputEvent or derived class");
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return ((inputEvent->mModifiers & WidgetInputEvent::GetModifier(aKey)) != 0);
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}
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void
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UIEvent::InitModifiers(const EventModifierInit& aParam)
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{
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if (NS_WARN_IF(!mEvent)) {
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return;
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}
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WidgetInputEvent* inputEvent = mEvent->AsInputEvent();
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MOZ_ASSERT(inputEvent,
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"This method shouldn't be called if it doesn't have modifiers");
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if (NS_WARN_IF(!inputEvent)) {
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return;
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}
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inputEvent->mModifiers = MODIFIER_NONE;
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#define SET_MODIFIER(aName, aValue) \
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if (aParam.m##aName) { \
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inputEvent->mModifiers |= aValue; \
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} \
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SET_MODIFIER(CtrlKey, MODIFIER_CONTROL)
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SET_MODIFIER(ShiftKey, MODIFIER_SHIFT)
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SET_MODIFIER(AltKey, MODIFIER_ALT)
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SET_MODIFIER(MetaKey, MODIFIER_META)
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SET_MODIFIER(ModifierAltGraph, MODIFIER_ALTGRAPH)
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SET_MODIFIER(ModifierCapsLock, MODIFIER_CAPSLOCK)
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SET_MODIFIER(ModifierFn, MODIFIER_FN)
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SET_MODIFIER(ModifierFnLock, MODIFIER_FNLOCK)
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SET_MODIFIER(ModifierNumLock, MODIFIER_NUMLOCK)
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SET_MODIFIER(ModifierOS, MODIFIER_OS)
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SET_MODIFIER(ModifierScrollLock, MODIFIER_SCROLLLOCK)
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SET_MODIFIER(ModifierSymbol, MODIFIER_SYMBOL)
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SET_MODIFIER(ModifierSymbolLock, MODIFIER_SYMBOLLOCK)
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#undef SET_MODIFIER
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}
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} // namespace dom
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} // namespace mozilla
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using namespace mozilla;
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using namespace mozilla::dom;
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already_AddRefed<UIEvent>
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NS_NewDOMUIEvent(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetGUIEvent* aEvent)
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{
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RefPtr<UIEvent> it = new UIEvent(aOwner, aPresContext, aEvent);
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return it.forget();
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}
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