1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/events/EventStateManager.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,5523 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 sw=2 et tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "mozilla/Attributes.h"
1.11 +#include "mozilla/EventDispatcher.h"
1.12 +#include "mozilla/EventStateManager.h"
1.13 +#include "mozilla/EventStates.h"
1.14 +#include "mozilla/IMEStateManager.h"
1.15 +#include "mozilla/MiscEvents.h"
1.16 +#include "mozilla/MathAlgorithms.h"
1.17 +#include "mozilla/MouseEvents.h"
1.18 +#include "mozilla/TextComposition.h"
1.19 +#include "mozilla/TextEvents.h"
1.20 +#include "mozilla/TouchEvents.h"
1.21 +#include "mozilla/dom/Event.h"
1.22 +#include "mozilla/dom/TabParent.h"
1.23 +#include "mozilla/dom/UIEvent.h"
1.24 +
1.25 +#include "ContentEventHandler.h"
1.26 +#include "IMEContentObserver.h"
1.27 +#include "WheelHandlingHelper.h"
1.28 +
1.29 +#include "nsCOMPtr.h"
1.30 +#include "nsFocusManager.h"
1.31 +#include "nsIContent.h"
1.32 +#include "nsINodeInfo.h"
1.33 +#include "nsIDocument.h"
1.34 +#include "nsIFrame.h"
1.35 +#include "nsIWidget.h"
1.36 +#include "nsPresContext.h"
1.37 +#include "nsIPresShell.h"
1.38 +#include "nsGkAtoms.h"
1.39 +#include "nsIFormControl.h"
1.40 +#include "nsIComboboxControlFrame.h"
1.41 +#include "nsIScrollableFrame.h"
1.42 +#include "nsIDOMHTMLElement.h"
1.43 +#include "nsIDOMXULControlElement.h"
1.44 +#include "nsNameSpaceManager.h"
1.45 +#include "nsIBaseWindow.h"
1.46 +#include "nsISelection.h"
1.47 +#include "nsITextControlElement.h"
1.48 +#include "nsFrameSelection.h"
1.49 +#include "nsPIDOMWindow.h"
1.50 +#include "nsPIWindowRoot.h"
1.51 +#include "nsIWebNavigation.h"
1.52 +#include "nsIContentViewer.h"
1.53 +#include "nsFrameManager.h"
1.54 +
1.55 +#include "nsIDOMXULElement.h"
1.56 +#include "nsIDOMKeyEvent.h"
1.57 +#include "nsIObserverService.h"
1.58 +#include "nsIDocShell.h"
1.59 +#include "nsIMarkupDocumentViewer.h"
1.60 +#include "nsIDOMWheelEvent.h"
1.61 +#include "nsIDOMDragEvent.h"
1.62 +#include "nsIDOMUIEvent.h"
1.63 +#include "nsIMozBrowserFrame.h"
1.64 +
1.65 +#include "nsSubDocumentFrame.h"
1.66 +#include "nsLayoutUtils.h"
1.67 +#include "nsIInterfaceRequestorUtils.h"
1.68 +#include "nsUnicharUtils.h"
1.69 +#include "nsContentUtils.h"
1.70 +
1.71 +#include "imgIContainer.h"
1.72 +#include "nsIProperties.h"
1.73 +#include "nsISupportsPrimitives.h"
1.74 +
1.75 +#include "nsServiceManagerUtils.h"
1.76 +#include "nsITimer.h"
1.77 +#include "nsFontMetrics.h"
1.78 +#include "nsIDOMXULDocument.h"
1.79 +#include "nsIDragService.h"
1.80 +#include "nsIDragSession.h"
1.81 +#include "mozilla/dom/DataTransfer.h"
1.82 +#include "nsContentAreaDragDrop.h"
1.83 +#ifdef MOZ_XUL
1.84 +#include "nsTreeBodyFrame.h"
1.85 +#endif
1.86 +#include "nsIController.h"
1.87 +#include "nsICommandParams.h"
1.88 +#include "mozilla/Services.h"
1.89 +#include "mozilla/dom/HTMLLabelElement.h"
1.90 +
1.91 +#include "mozilla/Preferences.h"
1.92 +#include "mozilla/LookAndFeel.h"
1.93 +#include "GeckoProfiler.h"
1.94 +#include "Units.h"
1.95 +
1.96 +#ifdef XP_MACOSX
1.97 +#import <ApplicationServices/ApplicationServices.h>
1.98 +#endif
1.99 +
1.100 +namespace mozilla {
1.101 +
1.102 +using namespace dom;
1.103 +
1.104 +//#define DEBUG_DOCSHELL_FOCUS
1.105 +
1.106 +#define NS_USER_INTERACTION_INTERVAL 5000 // ms
1.107 +
1.108 +static const LayoutDeviceIntPoint kInvalidRefPoint = LayoutDeviceIntPoint(-1,-1);
1.109 +
1.110 +static uint32_t gMouseOrKeyboardEventCounter = 0;
1.111 +static nsITimer* gUserInteractionTimer = nullptr;
1.112 +static nsITimerCallback* gUserInteractionTimerCallback = nullptr;
1.113 +
1.114 +static inline int32_t
1.115 +RoundDown(double aDouble)
1.116 +{
1.117 + return (aDouble > 0) ? static_cast<int32_t>(floor(aDouble)) :
1.118 + static_cast<int32_t>(ceil(aDouble));
1.119 +}
1.120 +
1.121 +#ifdef DEBUG_DOCSHELL_FOCUS
1.122 +static void
1.123 +PrintDocTree(nsIDocShellTreeItem* aParentItem, int aLevel)
1.124 +{
1.125 + for (int32_t i=0;i<aLevel;i++) printf(" ");
1.126 +
1.127 + int32_t childWebshellCount;
1.128 + aParentItem->GetChildCount(&childWebshellCount);
1.129 + nsCOMPtr<nsIDocShell> parentAsDocShell(do_QueryInterface(aParentItem));
1.130 + int32_t type = aParentItem->ItemType();
1.131 + nsCOMPtr<nsIPresShell> presShell = parentAsDocShell->GetPresShell();
1.132 + nsRefPtr<nsPresContext> presContext;
1.133 + parentAsDocShell->GetPresContext(getter_AddRefs(presContext));
1.134 + nsCOMPtr<nsIContentViewer> cv;
1.135 + parentAsDocShell->GetContentViewer(getter_AddRefs(cv));
1.136 + nsCOMPtr<nsIDOMDocument> domDoc;
1.137 + if (cv)
1.138 + cv->GetDOMDocument(getter_AddRefs(domDoc));
1.139 + nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
1.140 + nsCOMPtr<nsIDOMWindow> domwin = doc ? doc->GetWindow() : nullptr;
1.141 + nsIURI* uri = doc ? doc->GetDocumentURI() : nullptr;
1.142 +
1.143 + printf("DS %p Type %s Cnt %d Doc %p DW %p EM %p%c",
1.144 + static_cast<void*>(parentAsDocShell.get()),
1.145 + type==nsIDocShellTreeItem::typeChrome?"Chrome":"Content",
1.146 + childWebshellCount, static_cast<void*>(doc.get()),
1.147 + static_cast<void*>(domwin.get()),
1.148 + static_cast<void*>(presContext ? presContext->EventStateManager() : nullptr),
1.149 + uri ? ' ' : '\n');
1.150 + if (uri) {
1.151 + nsAutoCString spec;
1.152 + uri->GetSpec(spec);
1.153 + printf("\"%s\"\n", spec.get());
1.154 + }
1.155 +
1.156 + if (childWebshellCount > 0) {
1.157 + for (int32_t i = 0; i < childWebshellCount; i++) {
1.158 + nsCOMPtr<nsIDocShellTreeItem> child;
1.159 + aParentItem->GetChildAt(i, getter_AddRefs(child));
1.160 + PrintDocTree(child, aLevel + 1);
1.161 + }
1.162 + }
1.163 +}
1.164 +
1.165 +static void
1.166 +PrintDocTreeAll(nsIDocShellTreeItem* aItem)
1.167 +{
1.168 + nsCOMPtr<nsIDocShellTreeItem> item = aItem;
1.169 + for(;;) {
1.170 + nsCOMPtr<nsIDocShellTreeItem> parent;
1.171 + item->GetParent(getter_AddRefs(parent));
1.172 + if (!parent)
1.173 + break;
1.174 + item = parent;
1.175 + }
1.176 +
1.177 + PrintDocTree(item, 0);
1.178 +}
1.179 +#endif
1.180 +
1.181 +// mask values for ui.key.chromeAccess and ui.key.contentAccess
1.182 +#define NS_MODIFIER_SHIFT 1
1.183 +#define NS_MODIFIER_CONTROL 2
1.184 +#define NS_MODIFIER_ALT 4
1.185 +#define NS_MODIFIER_META 8
1.186 +#define NS_MODIFIER_OS 16
1.187 +
1.188 +static nsIDocument *
1.189 +GetDocumentFromWindow(nsIDOMWindow *aWindow)
1.190 +{
1.191 + nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(aWindow);
1.192 + return win ? win->GetExtantDoc() : nullptr;
1.193 +}
1.194 +
1.195 +/******************************************************************/
1.196 +/* mozilla::UITimerCallback */
1.197 +/******************************************************************/
1.198 +
1.199 +class UITimerCallback MOZ_FINAL : public nsITimerCallback
1.200 +{
1.201 +public:
1.202 + UITimerCallback() : mPreviousCount(0) {}
1.203 + NS_DECL_ISUPPORTS
1.204 + NS_DECL_NSITIMERCALLBACK
1.205 +private:
1.206 + uint32_t mPreviousCount;
1.207 +};
1.208 +
1.209 +NS_IMPL_ISUPPORTS(UITimerCallback, nsITimerCallback)
1.210 +
1.211 +// If aTimer is nullptr, this method always sends "user-interaction-inactive"
1.212 +// notification.
1.213 +NS_IMETHODIMP
1.214 +UITimerCallback::Notify(nsITimer* aTimer)
1.215 +{
1.216 + nsCOMPtr<nsIObserverService> obs =
1.217 + mozilla::services::GetObserverService();
1.218 + if (!obs)
1.219 + return NS_ERROR_FAILURE;
1.220 + if ((gMouseOrKeyboardEventCounter == mPreviousCount) || !aTimer) {
1.221 + gMouseOrKeyboardEventCounter = 0;
1.222 + obs->NotifyObservers(nullptr, "user-interaction-inactive", nullptr);
1.223 + if (gUserInteractionTimer) {
1.224 + gUserInteractionTimer->Cancel();
1.225 + NS_RELEASE(gUserInteractionTimer);
1.226 + }
1.227 + } else {
1.228 + obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
1.229 + EventStateManager::UpdateUserActivityTimer();
1.230 + }
1.231 + mPreviousCount = gMouseOrKeyboardEventCounter;
1.232 + return NS_OK;
1.233 +}
1.234 +
1.235 +/******************************************************************/
1.236 +/* mozilla::OverOutElementsWrapper */
1.237 +/******************************************************************/
1.238 +
1.239 +OverOutElementsWrapper::OverOutElementsWrapper()
1.240 + : mLastOverFrame(nullptr)
1.241 +{
1.242 +}
1.243 +
1.244 +OverOutElementsWrapper::~OverOutElementsWrapper()
1.245 +{
1.246 +}
1.247 +
1.248 +NS_IMPL_CYCLE_COLLECTION(OverOutElementsWrapper,
1.249 + mLastOverElement,
1.250 + mFirstOverEventElement,
1.251 + mFirstOutEventElement)
1.252 +NS_IMPL_CYCLE_COLLECTING_ADDREF(OverOutElementsWrapper)
1.253 +NS_IMPL_CYCLE_COLLECTING_RELEASE(OverOutElementsWrapper)
1.254 +
1.255 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(OverOutElementsWrapper)
1.256 + NS_INTERFACE_MAP_ENTRY(nsISupports)
1.257 +NS_INTERFACE_MAP_END
1.258 +
1.259 +/******************************************************************/
1.260 +/* mozilla::EventStateManager */
1.261 +/******************************************************************/
1.262 +
1.263 +static uint32_t sESMInstanceCount = 0;
1.264 +
1.265 +int32_t EventStateManager::sUserInputEventDepth = 0;
1.266 +bool EventStateManager::sNormalLMouseEventInProcess = false;
1.267 +EventStateManager* EventStateManager::sActiveESM = nullptr;
1.268 +nsIDocument* EventStateManager::sMouseOverDocument = nullptr;
1.269 +nsWeakFrame EventStateManager::sLastDragOverFrame = nullptr;
1.270 +LayoutDeviceIntPoint EventStateManager::sLastRefPoint = kInvalidRefPoint;
1.271 +nsIntPoint EventStateManager::sLastScreenPoint = nsIntPoint(0, 0);
1.272 +LayoutDeviceIntPoint EventStateManager::sSynthCenteringPoint = kInvalidRefPoint;
1.273 +CSSIntPoint EventStateManager::sLastClientPoint = CSSIntPoint(0, 0);
1.274 +bool EventStateManager::sIsPointerLocked = false;
1.275 +// Reference to the pointer locked element.
1.276 +nsWeakPtr EventStateManager::sPointerLockedElement;
1.277 +// Reference to the document which requested pointer lock.
1.278 +nsWeakPtr EventStateManager::sPointerLockedDoc;
1.279 +nsCOMPtr<nsIContent> EventStateManager::sDragOverContent = nullptr;
1.280 +TimeStamp EventStateManager::sHandlingInputStart;
1.281 +
1.282 +EventStateManager::WheelPrefs*
1.283 + EventStateManager::WheelPrefs::sInstance = nullptr;
1.284 +EventStateManager::DeltaAccumulator*
1.285 + EventStateManager::DeltaAccumulator::sInstance = nullptr;
1.286 +
1.287 +EventStateManager::EventStateManager()
1.288 + : mLockCursor(0)
1.289 + , mPreLockPoint(0,0)
1.290 + , mCurrentTarget(nullptr)
1.291 + // init d&d gesture state machine variables
1.292 + , mGestureDownPoint(0,0)
1.293 + , mPresContext(nullptr)
1.294 + , mLClickCount(0)
1.295 + , mMClickCount(0)
1.296 + , mRClickCount(0)
1.297 + , m_haveShutdown(false)
1.298 +{
1.299 + if (sESMInstanceCount == 0) {
1.300 + gUserInteractionTimerCallback = new UITimerCallback();
1.301 + if (gUserInteractionTimerCallback)
1.302 + NS_ADDREF(gUserInteractionTimerCallback);
1.303 + UpdateUserActivityTimer();
1.304 + }
1.305 + ++sESMInstanceCount;
1.306 +}
1.307 +
1.308 +nsresult
1.309 +EventStateManager::UpdateUserActivityTimer()
1.310 +{
1.311 + if (!gUserInteractionTimerCallback)
1.312 + return NS_OK;
1.313 +
1.314 + if (!gUserInteractionTimer)
1.315 + CallCreateInstance("@mozilla.org/timer;1", &gUserInteractionTimer);
1.316 +
1.317 + if (gUserInteractionTimer) {
1.318 + gUserInteractionTimer->InitWithCallback(gUserInteractionTimerCallback,
1.319 + NS_USER_INTERACTION_INTERVAL,
1.320 + nsITimer::TYPE_ONE_SHOT);
1.321 + }
1.322 + return NS_OK;
1.323 +}
1.324 +
1.325 +nsresult
1.326 +EventStateManager::Init()
1.327 +{
1.328 + nsCOMPtr<nsIObserverService> observerService =
1.329 + mozilla::services::GetObserverService();
1.330 + if (!observerService)
1.331 + return NS_ERROR_FAILURE;
1.332 +
1.333 + observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, true);
1.334 +
1.335 + if (sESMInstanceCount == 1) {
1.336 + Prefs::Init();
1.337 + }
1.338 +
1.339 + return NS_OK;
1.340 +}
1.341 +
1.342 +EventStateManager::~EventStateManager()
1.343 +{
1.344 + ReleaseCurrentIMEContentObserver();
1.345 +
1.346 + if (sActiveESM == this) {
1.347 + sActiveESM = nullptr;
1.348 + }
1.349 + if (Prefs::ClickHoldContextMenu())
1.350 + KillClickHoldTimer();
1.351 +
1.352 + if (mDocument == sMouseOverDocument)
1.353 + sMouseOverDocument = nullptr;
1.354 +
1.355 + --sESMInstanceCount;
1.356 + if(sESMInstanceCount == 0) {
1.357 + WheelTransaction::Shutdown();
1.358 + if (gUserInteractionTimerCallback) {
1.359 + gUserInteractionTimerCallback->Notify(nullptr);
1.360 + NS_RELEASE(gUserInteractionTimerCallback);
1.361 + }
1.362 + if (gUserInteractionTimer) {
1.363 + gUserInteractionTimer->Cancel();
1.364 + NS_RELEASE(gUserInteractionTimer);
1.365 + }
1.366 + Prefs::Shutdown();
1.367 + WheelPrefs::Shutdown();
1.368 + DeltaAccumulator::Shutdown();
1.369 + }
1.370 +
1.371 + if (sDragOverContent && sDragOverContent->OwnerDoc() == mDocument) {
1.372 + sDragOverContent = nullptr;
1.373 + }
1.374 +
1.375 + if (!m_haveShutdown) {
1.376 + Shutdown();
1.377 +
1.378 + // Don't remove from Observer service in Shutdown because Shutdown also
1.379 + // gets called from xpcom shutdown observer. And we don't want to remove
1.380 + // from the service in that case.
1.381 +
1.382 + nsCOMPtr<nsIObserverService> observerService =
1.383 + mozilla::services::GetObserverService();
1.384 + if (observerService) {
1.385 + observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
1.386 + }
1.387 + }
1.388 +
1.389 +}
1.390 +
1.391 +nsresult
1.392 +EventStateManager::Shutdown()
1.393 +{
1.394 + m_haveShutdown = true;
1.395 + return NS_OK;
1.396 +}
1.397 +
1.398 +NS_IMETHODIMP
1.399 +EventStateManager::Observe(nsISupports* aSubject,
1.400 + const char* aTopic,
1.401 + const char16_t *someData)
1.402 +{
1.403 + if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
1.404 + Shutdown();
1.405 + }
1.406 +
1.407 + return NS_OK;
1.408 +}
1.409 +
1.410 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EventStateManager)
1.411 + NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
1.412 + NS_INTERFACE_MAP_ENTRY(nsIObserver)
1.413 + NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
1.414 +NS_INTERFACE_MAP_END
1.415 +
1.416 +NS_IMPL_CYCLE_COLLECTING_ADDREF(EventStateManager)
1.417 +NS_IMPL_CYCLE_COLLECTING_RELEASE(EventStateManager)
1.418 +
1.419 +NS_IMPL_CYCLE_COLLECTION(EventStateManager,
1.420 + mCurrentTargetContent,
1.421 + mGestureDownContent,
1.422 + mGestureDownFrameOwner,
1.423 + mLastLeftMouseDownContent,
1.424 + mLastLeftMouseDownContentParent,
1.425 + mLastMiddleMouseDownContent,
1.426 + mLastMiddleMouseDownContentParent,
1.427 + mLastRightMouseDownContent,
1.428 + mLastRightMouseDownContentParent,
1.429 + mActiveContent,
1.430 + mHoverContent,
1.431 + mURLTargetContent,
1.432 + mMouseEnterLeaveHelper,
1.433 + mPointersEnterLeaveHelper,
1.434 + mDocument,
1.435 + mIMEContentObserver,
1.436 + mAccessKeys)
1.437 +
1.438 +void
1.439 +EventStateManager::ReleaseCurrentIMEContentObserver()
1.440 +{
1.441 + if (mIMEContentObserver) {
1.442 + mIMEContentObserver->DisconnectFromEventStateManager();
1.443 + }
1.444 + mIMEContentObserver = nullptr;
1.445 +}
1.446 +
1.447 +void
1.448 +EventStateManager::OnStartToObserveContent(
1.449 + IMEContentObserver* aIMEContentObserver)
1.450 +{
1.451 + ReleaseCurrentIMEContentObserver();
1.452 + mIMEContentObserver = aIMEContentObserver;
1.453 +}
1.454 +
1.455 +void
1.456 +EventStateManager::OnStopObservingContent(
1.457 + IMEContentObserver* aIMEContentObserver)
1.458 +{
1.459 + aIMEContentObserver->DisconnectFromEventStateManager();
1.460 + NS_ENSURE_TRUE_VOID(mIMEContentObserver == aIMEContentObserver);
1.461 + mIMEContentObserver = nullptr;
1.462 +}
1.463 +
1.464 +nsresult
1.465 +EventStateManager::PreHandleEvent(nsPresContext* aPresContext,
1.466 + WidgetEvent* aEvent,
1.467 + nsIFrame* aTargetFrame,
1.468 + nsEventStatus* aStatus)
1.469 +{
1.470 + NS_ENSURE_ARG_POINTER(aStatus);
1.471 + NS_ENSURE_ARG(aPresContext);
1.472 + if (!aEvent) {
1.473 + NS_ERROR("aEvent is null. This should never happen.");
1.474 + return NS_ERROR_NULL_POINTER;
1.475 + }
1.476 +
1.477 + mCurrentTarget = aTargetFrame;
1.478 + mCurrentTargetContent = nullptr;
1.479 +
1.480 + // Focus events don't necessarily need a frame.
1.481 + if (NS_EVENT_NEEDS_FRAME(aEvent)) {
1.482 + NS_ASSERTION(mCurrentTarget, "mCurrentTarget is null. this should not happen. see bug #13007");
1.483 + if (!mCurrentTarget) return NS_ERROR_NULL_POINTER;
1.484 + }
1.485 +#ifdef DEBUG
1.486 + if (aEvent->HasDragEventMessage() && sIsPointerLocked) {
1.487 + NS_ASSERTION(sIsPointerLocked,
1.488 + "sIsPointerLocked is true. Drag events should be suppressed when the pointer is locked.");
1.489 + }
1.490 +#endif
1.491 + // Store last known screenPoint and clientPoint so pointer lock
1.492 + // can use these values as constants.
1.493 + WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
1.494 + if (aEvent->mFlags.mIsTrusted &&
1.495 + ((mouseEvent && mouseEvent->IsReal()) ||
1.496 + aEvent->eventStructType == NS_WHEEL_EVENT) &&
1.497 + !sIsPointerLocked) {
1.498 + sLastScreenPoint =
1.499 + UIEvent::CalculateScreenPoint(aPresContext, aEvent);
1.500 + sLastClientPoint =
1.501 + UIEvent::CalculateClientPoint(aPresContext, aEvent, nullptr);
1.502 + }
1.503 +
1.504 + // Do not take account NS_MOUSE_ENTER/EXIT so that loading a page
1.505 + // when user is not active doesn't change the state to active.
1.506 + if (aEvent->mFlags.mIsTrusted &&
1.507 + ((mouseEvent && mouseEvent->IsReal() &&
1.508 + mouseEvent->message != NS_MOUSE_ENTER &&
1.509 + mouseEvent->message != NS_MOUSE_EXIT) ||
1.510 + aEvent->eventStructType == NS_WHEEL_EVENT ||
1.511 + aEvent->eventStructType == NS_KEY_EVENT)) {
1.512 + if (gMouseOrKeyboardEventCounter == 0) {
1.513 + nsCOMPtr<nsIObserverService> obs =
1.514 + mozilla::services::GetObserverService();
1.515 + if (obs) {
1.516 + obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
1.517 + UpdateUserActivityTimer();
1.518 + }
1.519 + }
1.520 + ++gMouseOrKeyboardEventCounter;
1.521 + }
1.522 +
1.523 + *aStatus = nsEventStatus_eIgnore;
1.524 +
1.525 + WheelTransaction::OnEvent(aEvent);
1.526 +
1.527 + switch (aEvent->message) {
1.528 + case NS_MOUSE_BUTTON_DOWN: {
1.529 + switch (mouseEvent->button) {
1.530 + case WidgetMouseEvent::eLeftButton:
1.531 + BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
1.532 + mLClickCount = mouseEvent->clickCount;
1.533 + SetClickCount(aPresContext, mouseEvent, aStatus);
1.534 + sNormalLMouseEventInProcess = true;
1.535 + break;
1.536 + case WidgetMouseEvent::eMiddleButton:
1.537 + mMClickCount = mouseEvent->clickCount;
1.538 + SetClickCount(aPresContext, mouseEvent, aStatus);
1.539 + break;
1.540 + case WidgetMouseEvent::eRightButton:
1.541 + mRClickCount = mouseEvent->clickCount;
1.542 + SetClickCount(aPresContext, mouseEvent, aStatus);
1.543 + break;
1.544 + }
1.545 + break;
1.546 + }
1.547 + case NS_MOUSE_BUTTON_UP: {
1.548 + switch (mouseEvent->button) {
1.549 + case WidgetMouseEvent::eLeftButton:
1.550 + if (Prefs::ClickHoldContextMenu()) {
1.551 + KillClickHoldTimer();
1.552 + }
1.553 + StopTrackingDragGesture();
1.554 + sNormalLMouseEventInProcess = false;
1.555 + // then fall through...
1.556 + case WidgetMouseEvent::eRightButton:
1.557 + case WidgetMouseEvent::eMiddleButton:
1.558 + SetClickCount(aPresContext, mouseEvent, aStatus);
1.559 + break;
1.560 + }
1.561 + break;
1.562 + }
1.563 + case NS_POINTER_CANCEL:
1.564 + {
1.565 + GenerateMouseEnterExit(mouseEvent);
1.566 + break;
1.567 + }
1.568 + case NS_MOUSE_EXIT:
1.569 + // If the event is not a top-level window exit, then it's not
1.570 + // really an exit --- we may have traversed widget boundaries but
1.571 + // we're still in our toplevel window.
1.572 + if (mouseEvent->exit != WidgetMouseEvent::eTopLevel) {
1.573 + // Treat it as a synthetic move so we don't generate spurious
1.574 + // "exit" or "move" events. Any necessary "out" or "over" events
1.575 + // will be generated by GenerateMouseEnterExit
1.576 + mouseEvent->message = NS_MOUSE_MOVE;
1.577 + mouseEvent->reason = WidgetMouseEvent::eSynthesized;
1.578 + // then fall through...
1.579 + } else {
1.580 + GenerateMouseEnterExit(mouseEvent);
1.581 + //This is a window level mouse exit event and should stop here
1.582 + aEvent->message = 0;
1.583 + break;
1.584 + }
1.585 + case NS_MOUSE_MOVE:
1.586 + case NS_POINTER_DOWN:
1.587 + case NS_POINTER_MOVE: {
1.588 + // on the Mac, GenerateDragGesture() may not return until the drag
1.589 + // has completed and so |aTargetFrame| may have been deleted (moving
1.590 + // a bookmark, for example). If this is the case, however, we know
1.591 + // that ClearFrameRefs() has been called and it cleared out
1.592 + // |mCurrentTarget|. As a result, we should pass |mCurrentTarget|
1.593 + // into UpdateCursor().
1.594 + GenerateDragGesture(aPresContext, mouseEvent);
1.595 + UpdateCursor(aPresContext, aEvent, mCurrentTarget, aStatus);
1.596 + GenerateMouseEnterExit(mouseEvent);
1.597 + // Flush pending layout changes, so that later mouse move events
1.598 + // will go to the right nodes.
1.599 + FlushPendingEvents(aPresContext);
1.600 + break;
1.601 + }
1.602 + case NS_DRAGDROP_GESTURE:
1.603 + if (Prefs::ClickHoldContextMenu()) {
1.604 + // an external drag gesture event came in, not generated internally
1.605 + // by Gecko. Make sure we get rid of the click-hold timer.
1.606 + KillClickHoldTimer();
1.607 + }
1.608 + break;
1.609 + case NS_DRAGDROP_OVER:
1.610 + // NS_DRAGDROP_DROP is fired before NS_DRAGDROP_DRAGDROP so send
1.611 + // the enter/exit events before NS_DRAGDROP_DROP.
1.612 + GenerateDragDropEnterExit(aPresContext, aEvent->AsDragEvent());
1.613 + break;
1.614 +
1.615 + case NS_KEY_PRESS:
1.616 + {
1.617 + WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
1.618 +
1.619 + int32_t modifierMask = 0;
1.620 + if (keyEvent->IsShift())
1.621 + modifierMask |= NS_MODIFIER_SHIFT;
1.622 + if (keyEvent->IsControl())
1.623 + modifierMask |= NS_MODIFIER_CONTROL;
1.624 + if (keyEvent->IsAlt())
1.625 + modifierMask |= NS_MODIFIER_ALT;
1.626 + if (keyEvent->IsMeta())
1.627 + modifierMask |= NS_MODIFIER_META;
1.628 + if (keyEvent->IsOS())
1.629 + modifierMask |= NS_MODIFIER_OS;
1.630 +
1.631 + // Prevent keyboard scrolling while an accesskey modifier is in use.
1.632 + if (modifierMask &&
1.633 + (modifierMask == Prefs::ChromeAccessModifierMask() ||
1.634 + modifierMask == Prefs::ContentAccessModifierMask())) {
1.635 + HandleAccessKey(aPresContext, keyEvent, aStatus, nullptr,
1.636 + eAccessKeyProcessingNormal, modifierMask);
1.637 + }
1.638 + }
1.639 + // then fall through...
1.640 + case NS_KEY_DOWN:
1.641 + case NS_KEY_UP:
1.642 + {
1.643 + nsIContent* content = GetFocusedContent();
1.644 + if (content)
1.645 + mCurrentTargetContent = content;
1.646 +
1.647 + // NOTE: Don't refer TextComposition::IsComposing() since DOM Level 3
1.648 + // Events defines that KeyboardEvent.isComposing is true when it's
1.649 + // dispatched after compositionstart and compositionend.
1.650 + // TextComposition::IsComposing() is false even before
1.651 + // compositionend if there is no composing string.
1.652 + WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
1.653 + nsRefPtr<TextComposition> composition =
1.654 + IMEStateManager::GetTextCompositionFor(keyEvent);
1.655 + keyEvent->mIsComposing = !!composition;
1.656 + }
1.657 + break;
1.658 + case NS_WHEEL_WHEEL:
1.659 + case NS_WHEEL_START:
1.660 + case NS_WHEEL_STOP:
1.661 + {
1.662 + NS_ASSERTION(aEvent->mFlags.mIsTrusted,
1.663 + "Untrusted wheel event shouldn't be here");
1.664 +
1.665 + nsIContent* content = GetFocusedContent();
1.666 + if (content) {
1.667 + mCurrentTargetContent = content;
1.668 + }
1.669 +
1.670 + if (aEvent->message != NS_WHEEL_WHEEL) {
1.671 + break;
1.672 + }
1.673 +
1.674 + WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
1.675 + WheelPrefs::GetInstance()->ApplyUserPrefsToDelta(wheelEvent);
1.676 +
1.677 + // If we won't dispatch a DOM event for this event, nothing to do anymore.
1.678 + if (!wheelEvent->IsAllowedToDispatchDOMEvent()) {
1.679 + break;
1.680 + }
1.681 +
1.682 + // Init lineOrPageDelta values for line scroll events for some devices
1.683 + // on some platforms which might dispatch wheel events which don't have
1.684 + // lineOrPageDelta values. And also, if delta values are customized by
1.685 + // prefs, this recomputes them.
1.686 + DeltaAccumulator::GetInstance()->
1.687 + InitLineOrPageDelta(aTargetFrame, this, wheelEvent);
1.688 + }
1.689 + break;
1.690 + case NS_QUERY_SELECTED_TEXT:
1.691 + DoQuerySelectedText(aEvent->AsQueryContentEvent());
1.692 + break;
1.693 + case NS_QUERY_TEXT_CONTENT:
1.694 + {
1.695 + if (RemoteQueryContentEvent(aEvent)) {
1.696 + break;
1.697 + }
1.698 + ContentEventHandler handler(mPresContext);
1.699 + handler.OnQueryTextContent(aEvent->AsQueryContentEvent());
1.700 + }
1.701 + break;
1.702 + case NS_QUERY_CARET_RECT:
1.703 + {
1.704 + if (RemoteQueryContentEvent(aEvent)) {
1.705 + break;
1.706 + }
1.707 + ContentEventHandler handler(mPresContext);
1.708 + handler.OnQueryCaretRect(aEvent->AsQueryContentEvent());
1.709 + }
1.710 + break;
1.711 + case NS_QUERY_TEXT_RECT:
1.712 + {
1.713 + if (RemoteQueryContentEvent(aEvent)) {
1.714 + break;
1.715 + }
1.716 + ContentEventHandler handler(mPresContext);
1.717 + handler.OnQueryTextRect(aEvent->AsQueryContentEvent());
1.718 + }
1.719 + break;
1.720 + case NS_QUERY_EDITOR_RECT:
1.721 + {
1.722 + // XXX remote event
1.723 + ContentEventHandler handler(mPresContext);
1.724 + handler.OnQueryEditorRect(aEvent->AsQueryContentEvent());
1.725 + }
1.726 + break;
1.727 + case NS_QUERY_CONTENT_STATE:
1.728 + {
1.729 + // XXX remote event
1.730 + ContentEventHandler handler(mPresContext);
1.731 + handler.OnQueryContentState(aEvent->AsQueryContentEvent());
1.732 + }
1.733 + break;
1.734 + case NS_QUERY_SELECTION_AS_TRANSFERABLE:
1.735 + {
1.736 + // XXX remote event
1.737 + ContentEventHandler handler(mPresContext);
1.738 + handler.OnQuerySelectionAsTransferable(aEvent->AsQueryContentEvent());
1.739 + }
1.740 + break;
1.741 + case NS_QUERY_CHARACTER_AT_POINT:
1.742 + {
1.743 + // XXX remote event
1.744 + ContentEventHandler handler(mPresContext);
1.745 + handler.OnQueryCharacterAtPoint(aEvent->AsQueryContentEvent());
1.746 + }
1.747 + break;
1.748 + case NS_QUERY_DOM_WIDGET_HITTEST:
1.749 + {
1.750 + // XXX remote event
1.751 + ContentEventHandler handler(mPresContext);
1.752 + handler.OnQueryDOMWidgetHittest(aEvent->AsQueryContentEvent());
1.753 + }
1.754 + break;
1.755 + case NS_SELECTION_SET:
1.756 + {
1.757 + WidgetSelectionEvent* selectionEvent = aEvent->AsSelectionEvent();
1.758 + if (IsTargetCrossProcess(selectionEvent)) {
1.759 + // Will not be handled locally, remote the event
1.760 + if (GetCrossProcessTarget()->SendSelectionEvent(*selectionEvent)) {
1.761 + selectionEvent->mSucceeded = true;
1.762 + }
1.763 + break;
1.764 + }
1.765 + ContentEventHandler handler(mPresContext);
1.766 + handler.OnSelectionEvent(selectionEvent);
1.767 + }
1.768 + break;
1.769 + case NS_CONTENT_COMMAND_CUT:
1.770 + case NS_CONTENT_COMMAND_COPY:
1.771 + case NS_CONTENT_COMMAND_PASTE:
1.772 + case NS_CONTENT_COMMAND_DELETE:
1.773 + case NS_CONTENT_COMMAND_UNDO:
1.774 + case NS_CONTENT_COMMAND_REDO:
1.775 + case NS_CONTENT_COMMAND_PASTE_TRANSFERABLE:
1.776 + {
1.777 + DoContentCommandEvent(aEvent->AsContentCommandEvent());
1.778 + }
1.779 + break;
1.780 + case NS_CONTENT_COMMAND_SCROLL:
1.781 + {
1.782 + DoContentCommandScrollEvent(aEvent->AsContentCommandEvent());
1.783 + }
1.784 + break;
1.785 + case NS_TEXT_TEXT:
1.786 + {
1.787 + WidgetTextEvent *textEvent = aEvent->AsTextEvent();
1.788 + if (IsTargetCrossProcess(textEvent)) {
1.789 + // Will not be handled locally, remote the event
1.790 + if (GetCrossProcessTarget()->SendTextEvent(*textEvent)) {
1.791 + // Cancel local dispatching
1.792 + aEvent->mFlags.mPropagationStopped = true;
1.793 + }
1.794 + }
1.795 + }
1.796 + break;
1.797 + case NS_COMPOSITION_START:
1.798 + if (aEvent->mFlags.mIsTrusted) {
1.799 + // If the event is trusted event, set the selected text to data of
1.800 + // composition event.
1.801 + WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
1.802 + WidgetQueryContentEvent selectedText(true, NS_QUERY_SELECTED_TEXT,
1.803 + compositionEvent->widget);
1.804 + DoQuerySelectedText(&selectedText);
1.805 + NS_ASSERTION(selectedText.mSucceeded, "Failed to get selected text");
1.806 + compositionEvent->data = selectedText.mReply.mString;
1.807 + }
1.808 + // through to compositionend handling
1.809 + case NS_COMPOSITION_UPDATE:
1.810 + case NS_COMPOSITION_END:
1.811 + {
1.812 + WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
1.813 + if (IsTargetCrossProcess(compositionEvent)) {
1.814 + // Will not be handled locally, remote the event
1.815 + if (GetCrossProcessTarget()->SendCompositionEvent(*compositionEvent)) {
1.816 + // Cancel local dispatching
1.817 + aEvent->mFlags.mPropagationStopped = true;
1.818 + }
1.819 + }
1.820 + }
1.821 + break;
1.822 + }
1.823 + return NS_OK;
1.824 +}
1.825 +
1.826 +// static
1.827 +int32_t
1.828 +EventStateManager::GetAccessModifierMaskFor(nsISupports* aDocShell)
1.829 +{
1.830 + nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryInterface(aDocShell));
1.831 + if (!treeItem)
1.832 + return -1; // invalid modifier
1.833 +
1.834 + switch (treeItem->ItemType()) {
1.835 + case nsIDocShellTreeItem::typeChrome:
1.836 + return Prefs::ChromeAccessModifierMask();
1.837 +
1.838 + case nsIDocShellTreeItem::typeContent:
1.839 + return Prefs::ContentAccessModifierMask();
1.840 +
1.841 + default:
1.842 + return -1; // invalid modifier
1.843 + }
1.844 +}
1.845 +
1.846 +static bool
1.847 +IsAccessKeyTarget(nsIContent* aContent, nsIFrame* aFrame, nsAString& aKey)
1.848 +{
1.849 + // Use GetAttr because we want Unicode case=insensitive matching
1.850 + // XXXbz shouldn't this be case-sensitive, per spec?
1.851 + nsString contentKey;
1.852 + if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, contentKey) ||
1.853 + !contentKey.Equals(aKey, nsCaseInsensitiveStringComparator()))
1.854 + return false;
1.855 +
1.856 + nsCOMPtr<nsIDOMXULDocument> xulDoc =
1.857 + do_QueryInterface(aContent->OwnerDoc());
1.858 + if (!xulDoc && !aContent->IsXUL())
1.859 + return true;
1.860 +
1.861 + // For XUL we do visibility checks.
1.862 + if (!aFrame)
1.863 + return false;
1.864 +
1.865 + if (aFrame->IsFocusable())
1.866 + return true;
1.867 +
1.868 + if (!aFrame->IsVisibleConsideringAncestors())
1.869 + return false;
1.870 +
1.871 + // XUL controls can be activated.
1.872 + nsCOMPtr<nsIDOMXULControlElement> control(do_QueryInterface(aContent));
1.873 + if (control)
1.874 + return true;
1.875 +
1.876 + if (aContent->IsHTML()) {
1.877 + nsIAtom* tag = aContent->Tag();
1.878 +
1.879 + // HTML area, label and legend elements are never focusable, so
1.880 + // we need to check for them explicitly before giving up.
1.881 + if (tag == nsGkAtoms::area ||
1.882 + tag == nsGkAtoms::label ||
1.883 + tag == nsGkAtoms::legend)
1.884 + return true;
1.885 +
1.886 + } else if (aContent->IsXUL()) {
1.887 + // XUL label elements are never focusable, so we need to check for them
1.888 + // explicitly before giving up.
1.889 + if (aContent->Tag() == nsGkAtoms::label)
1.890 + return true;
1.891 + }
1.892 +
1.893 + return false;
1.894 +}
1.895 +
1.896 +bool
1.897 +EventStateManager::ExecuteAccessKey(nsTArray<uint32_t>& aAccessCharCodes,
1.898 + bool aIsTrustedEvent)
1.899 +{
1.900 + int32_t count, start = -1;
1.901 + nsIContent* focusedContent = GetFocusedContent();
1.902 + if (focusedContent) {
1.903 + start = mAccessKeys.IndexOf(focusedContent);
1.904 + if (start == -1 && focusedContent->GetBindingParent())
1.905 + start = mAccessKeys.IndexOf(focusedContent->GetBindingParent());
1.906 + }
1.907 + nsIContent *content;
1.908 + nsIFrame *frame;
1.909 + int32_t length = mAccessKeys.Count();
1.910 + for (uint32_t i = 0; i < aAccessCharCodes.Length(); ++i) {
1.911 + uint32_t ch = aAccessCharCodes[i];
1.912 + nsAutoString accessKey;
1.913 + AppendUCS4ToUTF16(ch, accessKey);
1.914 + for (count = 1; count <= length; ++count) {
1.915 + content = mAccessKeys[(start + count) % length];
1.916 + frame = content->GetPrimaryFrame();
1.917 + if (IsAccessKeyTarget(content, frame, accessKey)) {
1.918 + bool shouldActivate = Prefs::KeyCausesActivation();
1.919 + while (shouldActivate && ++count <= length) {
1.920 + nsIContent *oc = mAccessKeys[(start + count) % length];
1.921 + nsIFrame *of = oc->GetPrimaryFrame();
1.922 + if (IsAccessKeyTarget(oc, of, accessKey))
1.923 + shouldActivate = false;
1.924 + }
1.925 + if (shouldActivate)
1.926 + content->PerformAccesskey(shouldActivate, aIsTrustedEvent);
1.927 + else {
1.928 + nsIFocusManager* fm = nsFocusManager::GetFocusManager();
1.929 + if (fm) {
1.930 + nsCOMPtr<nsIDOMElement> element = do_QueryInterface(content);
1.931 + fm->SetFocus(element, nsIFocusManager::FLAG_BYKEY);
1.932 + }
1.933 + }
1.934 + return true;
1.935 + }
1.936 + }
1.937 + }
1.938 + return false;
1.939 +}
1.940 +
1.941 +bool
1.942 +EventStateManager::GetAccessKeyLabelPrefix(nsAString& aPrefix)
1.943 +{
1.944 + aPrefix.Truncate();
1.945 + nsAutoString separator, modifierText;
1.946 + nsContentUtils::GetModifierSeparatorText(separator);
1.947 +
1.948 + nsCOMPtr<nsISupports> container = mPresContext->GetContainerWeak();
1.949 + int32_t modifierMask = GetAccessModifierMaskFor(container);
1.950 +
1.951 + if (modifierMask & NS_MODIFIER_CONTROL) {
1.952 + nsContentUtils::GetControlText(modifierText);
1.953 + aPrefix.Append(modifierText + separator);
1.954 + }
1.955 + if (modifierMask & NS_MODIFIER_META) {
1.956 + nsContentUtils::GetMetaText(modifierText);
1.957 + aPrefix.Append(modifierText + separator);
1.958 + }
1.959 + if (modifierMask & NS_MODIFIER_OS) {
1.960 + nsContentUtils::GetOSText(modifierText);
1.961 + aPrefix.Append(modifierText + separator);
1.962 + }
1.963 + if (modifierMask & NS_MODIFIER_ALT) {
1.964 + nsContentUtils::GetAltText(modifierText);
1.965 + aPrefix.Append(modifierText + separator);
1.966 + }
1.967 + if (modifierMask & NS_MODIFIER_SHIFT) {
1.968 + nsContentUtils::GetShiftText(modifierText);
1.969 + aPrefix.Append(modifierText + separator);
1.970 + }
1.971 + return !aPrefix.IsEmpty();
1.972 +}
1.973 +
1.974 +void
1.975 +EventStateManager::HandleAccessKey(nsPresContext* aPresContext,
1.976 + WidgetKeyboardEvent* aEvent,
1.977 + nsEventStatus* aStatus,
1.978 + nsIDocShellTreeItem* aBubbledFrom,
1.979 + ProcessingAccessKeyState aAccessKeyState,
1.980 + int32_t aModifierMask)
1.981 +{
1.982 + nsCOMPtr<nsIDocShell> docShell = aPresContext->GetDocShell();
1.983 +
1.984 + // Alt or other accesskey modifier is down, we may need to do an accesskey
1.985 + if (mAccessKeys.Count() > 0 &&
1.986 + aModifierMask == GetAccessModifierMaskFor(docShell)) {
1.987 + // Someone registered an accesskey. Find and activate it.
1.988 + nsAutoTArray<uint32_t, 10> accessCharCodes;
1.989 + nsContentUtils::GetAccessKeyCandidates(aEvent, accessCharCodes);
1.990 + if (ExecuteAccessKey(accessCharCodes, aEvent->mFlags.mIsTrusted)) {
1.991 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.992 + return;
1.993 + }
1.994 + }
1.995 +
1.996 + // after the local accesskey handling
1.997 + if (nsEventStatus_eConsumeNoDefault != *aStatus) {
1.998 + // checking all sub docshells
1.999 +
1.1000 + if (!docShell) {
1.1001 + NS_WARNING("no docShellTreeNode for presContext");
1.1002 + return;
1.1003 + }
1.1004 +
1.1005 + int32_t childCount;
1.1006 + docShell->GetChildCount(&childCount);
1.1007 + for (int32_t counter = 0; counter < childCount; counter++) {
1.1008 + // Not processing the child which bubbles up the handling
1.1009 + nsCOMPtr<nsIDocShellTreeItem> subShellItem;
1.1010 + docShell->GetChildAt(counter, getter_AddRefs(subShellItem));
1.1011 + if (aAccessKeyState == eAccessKeyProcessingUp &&
1.1012 + subShellItem == aBubbledFrom)
1.1013 + continue;
1.1014 +
1.1015 + nsCOMPtr<nsIDocShell> subDS = do_QueryInterface(subShellItem);
1.1016 + if (subDS && IsShellVisible(subDS)) {
1.1017 + nsCOMPtr<nsIPresShell> subPS = subDS->GetPresShell();
1.1018 +
1.1019 + // Docshells need not have a presshell (eg. display:none
1.1020 + // iframes, docshells in transition between documents, etc).
1.1021 + if (!subPS) {
1.1022 + // Oh, well. Just move on to the next child
1.1023 + continue;
1.1024 + }
1.1025 +
1.1026 + nsPresContext *subPC = subPS->GetPresContext();
1.1027 +
1.1028 + EventStateManager* esm =
1.1029 + static_cast<EventStateManager*>(subPC->EventStateManager());
1.1030 +
1.1031 + if (esm)
1.1032 + esm->HandleAccessKey(subPC, aEvent, aStatus, nullptr,
1.1033 + eAccessKeyProcessingDown, aModifierMask);
1.1034 +
1.1035 + if (nsEventStatus_eConsumeNoDefault == *aStatus)
1.1036 + break;
1.1037 + }
1.1038 + }
1.1039 + }// if end . checking all sub docshell ends here.
1.1040 +
1.1041 + // bubble up the process to the parent docshell if necessary
1.1042 + if (eAccessKeyProcessingDown != aAccessKeyState && nsEventStatus_eConsumeNoDefault != *aStatus) {
1.1043 + if (!docShell) {
1.1044 + NS_WARNING("no docShellTreeItem for presContext");
1.1045 + return;
1.1046 + }
1.1047 +
1.1048 + nsCOMPtr<nsIDocShellTreeItem> parentShellItem;
1.1049 + docShell->GetParent(getter_AddRefs(parentShellItem));
1.1050 + nsCOMPtr<nsIDocShell> parentDS = do_QueryInterface(parentShellItem);
1.1051 + if (parentDS) {
1.1052 + nsCOMPtr<nsIPresShell> parentPS = parentDS->GetPresShell();
1.1053 + NS_ASSERTION(parentPS, "Our PresShell exists but the parent's does not?");
1.1054 +
1.1055 + nsPresContext *parentPC = parentPS->GetPresContext();
1.1056 + NS_ASSERTION(parentPC, "PresShell without PresContext");
1.1057 +
1.1058 + EventStateManager* esm =
1.1059 + static_cast<EventStateManager*>(parentPC->EventStateManager());
1.1060 +
1.1061 + if (esm)
1.1062 + esm->HandleAccessKey(parentPC, aEvent, aStatus, docShell,
1.1063 + eAccessKeyProcessingUp, aModifierMask);
1.1064 + }
1.1065 + }// if end. bubble up process
1.1066 +}// end of HandleAccessKey
1.1067 +
1.1068 +bool
1.1069 +EventStateManager::DispatchCrossProcessEvent(WidgetEvent* aEvent,
1.1070 + nsFrameLoader* aFrameLoader,
1.1071 + nsEventStatus *aStatus) {
1.1072 + PBrowserParent* remoteBrowser = aFrameLoader->GetRemoteBrowser();
1.1073 + TabParent* remote = static_cast<TabParent*>(remoteBrowser);
1.1074 + if (!remote) {
1.1075 + return false;
1.1076 + }
1.1077 +
1.1078 + switch (aEvent->eventStructType) {
1.1079 + case NS_MOUSE_EVENT: {
1.1080 + return remote->SendRealMouseEvent(*aEvent->AsMouseEvent());
1.1081 + }
1.1082 + case NS_KEY_EVENT: {
1.1083 + return remote->SendRealKeyEvent(*aEvent->AsKeyboardEvent());
1.1084 + }
1.1085 + case NS_WHEEL_EVENT: {
1.1086 + return remote->SendMouseWheelEvent(*aEvent->AsWheelEvent());
1.1087 + }
1.1088 + case NS_TOUCH_EVENT: {
1.1089 + // Let the child process synthesize a mouse event if needed, and
1.1090 + // ensure we don't synthesize one in this process.
1.1091 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.1092 + return remote->SendRealTouchEvent(*aEvent->AsTouchEvent());
1.1093 + }
1.1094 + default: {
1.1095 + MOZ_CRASH("Attempt to send non-whitelisted event?");
1.1096 + }
1.1097 + }
1.1098 +}
1.1099 +
1.1100 +bool
1.1101 +EventStateManager::IsRemoteTarget(nsIContent* target) {
1.1102 + if (!target) {
1.1103 + return false;
1.1104 + }
1.1105 +
1.1106 + // <browser/iframe remote=true> from XUL
1.1107 + if ((target->Tag() == nsGkAtoms::browser ||
1.1108 + target->Tag() == nsGkAtoms::iframe) &&
1.1109 + target->IsXUL() &&
1.1110 + target->AttrValueIs(kNameSpaceID_None, nsGkAtoms::Remote,
1.1111 + nsGkAtoms::_true, eIgnoreCase)) {
1.1112 + return true;
1.1113 + }
1.1114 +
1.1115 + // <frame/iframe mozbrowser/mozapp>
1.1116 + nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(target);
1.1117 + if (browserFrame && browserFrame->GetReallyIsBrowserOrApp()) {
1.1118 + return !!TabParent::GetFrom(target);
1.1119 + }
1.1120 +
1.1121 + return false;
1.1122 +}
1.1123 +
1.1124 +/*static*/ LayoutDeviceIntPoint
1.1125 +EventStateManager::GetChildProcessOffset(nsFrameLoader* aFrameLoader,
1.1126 + const WidgetEvent& aEvent)
1.1127 +{
1.1128 + // The "toplevel widget" in child processes is always at position
1.1129 + // 0,0. Map the event coordinates to match that.
1.1130 + nsIFrame* targetFrame = aFrameLoader->GetPrimaryFrameOfOwningContent();
1.1131 + if (!targetFrame) {
1.1132 + return LayoutDeviceIntPoint();
1.1133 + }
1.1134 + nsPresContext* presContext = targetFrame->PresContext();
1.1135 +
1.1136 + // Find out how far we're offset from the nearest widget.
1.1137 + nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(&aEvent,
1.1138 + targetFrame);
1.1139 + return LayoutDeviceIntPoint::FromAppUnitsToNearest(pt, presContext->AppUnitsPerDevPixel());
1.1140 +}
1.1141 +
1.1142 +bool
1.1143 +CrossProcessSafeEvent(const WidgetEvent& aEvent)
1.1144 +{
1.1145 + switch (aEvent.eventStructType) {
1.1146 + case NS_KEY_EVENT:
1.1147 + case NS_WHEEL_EVENT:
1.1148 + return true;
1.1149 + case NS_MOUSE_EVENT:
1.1150 + switch (aEvent.message) {
1.1151 + case NS_MOUSE_BUTTON_DOWN:
1.1152 + case NS_MOUSE_BUTTON_UP:
1.1153 + case NS_MOUSE_MOVE:
1.1154 + case NS_CONTEXTMENU:
1.1155 + return true;
1.1156 + default:
1.1157 + return false;
1.1158 + }
1.1159 + case NS_TOUCH_EVENT:
1.1160 + switch (aEvent.message) {
1.1161 + case NS_TOUCH_START:
1.1162 + case NS_TOUCH_MOVE:
1.1163 + case NS_TOUCH_END:
1.1164 + case NS_TOUCH_CANCEL:
1.1165 + return true;
1.1166 + default:
1.1167 + return false;
1.1168 + }
1.1169 + default:
1.1170 + return false;
1.1171 + }
1.1172 +}
1.1173 +
1.1174 +bool
1.1175 +EventStateManager::HandleCrossProcessEvent(WidgetEvent* aEvent,
1.1176 + nsIFrame* aTargetFrame,
1.1177 + nsEventStatus *aStatus) {
1.1178 + if (*aStatus == nsEventStatus_eConsumeNoDefault ||
1.1179 + aEvent->mFlags.mNoCrossProcessBoundaryForwarding ||
1.1180 + !CrossProcessSafeEvent(*aEvent)) {
1.1181 + return false;
1.1182 + }
1.1183 +
1.1184 + // Collect the remote event targets we're going to forward this
1.1185 + // event to.
1.1186 + //
1.1187 + // NB: the elements of |targets| must be unique, for correctness.
1.1188 + nsAutoTArray<nsCOMPtr<nsIContent>, 1> targets;
1.1189 + if (aEvent->eventStructType != NS_TOUCH_EVENT ||
1.1190 + aEvent->message == NS_TOUCH_START) {
1.1191 + // If this event only has one target, and it's remote, add it to
1.1192 + // the array.
1.1193 + nsIFrame* frame = GetEventTarget();
1.1194 + nsIContent* target = frame ? frame->GetContent() : nullptr;
1.1195 + if (IsRemoteTarget(target)) {
1.1196 + targets.AppendElement(target);
1.1197 + }
1.1198 + } else {
1.1199 + // This is a touch event with possibly multiple touch points.
1.1200 + // Each touch point may have its own target. So iterate through
1.1201 + // all of them and collect the unique set of targets for event
1.1202 + // forwarding.
1.1203 + //
1.1204 + // This loop is similar to the one used in
1.1205 + // PresShell::DispatchTouchEvent().
1.1206 + const nsTArray< nsRefPtr<Touch> >& touches =
1.1207 + aEvent->AsTouchEvent()->touches;
1.1208 + for (uint32_t i = 0; i < touches.Length(); ++i) {
1.1209 + Touch* touch = touches[i];
1.1210 + // NB: the |mChanged| check is an optimization, subprocesses can
1.1211 + // compute this for themselves. If the touch hasn't changed, we
1.1212 + // may be able to avoid forwarding the event entirely (which is
1.1213 + // not free).
1.1214 + if (!touch || !touch->mChanged) {
1.1215 + continue;
1.1216 + }
1.1217 + nsCOMPtr<EventTarget> targetPtr = touch->mTarget;
1.1218 + if (!targetPtr) {
1.1219 + continue;
1.1220 + }
1.1221 + nsCOMPtr<nsIContent> target = do_QueryInterface(targetPtr);
1.1222 + if (IsRemoteTarget(target) && !targets.Contains(target)) {
1.1223 + targets.AppendElement(target);
1.1224 + }
1.1225 + }
1.1226 + }
1.1227 +
1.1228 + if (targets.Length() == 0) {
1.1229 + return false;
1.1230 + }
1.1231 +
1.1232 + // Look up the frame loader for all the remote targets we found, and
1.1233 + // then dispatch the event to the remote content they represent.
1.1234 + bool dispatched = false;
1.1235 + for (uint32_t i = 0; i < targets.Length(); ++i) {
1.1236 + nsIContent* target = targets[i];
1.1237 + nsCOMPtr<nsIFrameLoaderOwner> loaderOwner = do_QueryInterface(target);
1.1238 + if (!loaderOwner) {
1.1239 + continue;
1.1240 + }
1.1241 +
1.1242 + nsRefPtr<nsFrameLoader> frameLoader = loaderOwner->GetFrameLoader();
1.1243 + if (!frameLoader) {
1.1244 + continue;
1.1245 + }
1.1246 +
1.1247 + uint32_t eventMode;
1.1248 + frameLoader->GetEventMode(&eventMode);
1.1249 + if (eventMode == nsIFrameLoader::EVENT_MODE_DONT_FORWARD_TO_CHILD) {
1.1250 + continue;
1.1251 + }
1.1252 +
1.1253 + dispatched |= DispatchCrossProcessEvent(aEvent, frameLoader, aStatus);
1.1254 + }
1.1255 + return dispatched;
1.1256 +}
1.1257 +
1.1258 +//
1.1259 +// CreateClickHoldTimer
1.1260 +//
1.1261 +// Fire off a timer for determining if the user wants click-hold. This timer
1.1262 +// is a one-shot that will be cancelled when the user moves enough to fire
1.1263 +// a drag.
1.1264 +//
1.1265 +void
1.1266 +EventStateManager::CreateClickHoldTimer(nsPresContext* inPresContext,
1.1267 + nsIFrame* inDownFrame,
1.1268 + WidgetGUIEvent* inMouseDownEvent)
1.1269 +{
1.1270 + if (!inMouseDownEvent->mFlags.mIsTrusted || IsRemoteTarget(mGestureDownContent))
1.1271 + return;
1.1272 +
1.1273 + // just to be anal (er, safe)
1.1274 + if (mClickHoldTimer) {
1.1275 + mClickHoldTimer->Cancel();
1.1276 + mClickHoldTimer = nullptr;
1.1277 + }
1.1278 +
1.1279 + // if content clicked on has a popup, don't even start the timer
1.1280 + // since we'll end up conflicting and both will show.
1.1281 + if (mGestureDownContent) {
1.1282 + // check for the |popup| attribute
1.1283 + if (nsContentUtils::HasNonEmptyAttr(mGestureDownContent, kNameSpaceID_None,
1.1284 + nsGkAtoms::popup))
1.1285 + return;
1.1286 +
1.1287 + // check for a <menubutton> like bookmarks
1.1288 + if (mGestureDownContent->Tag() == nsGkAtoms::menubutton)
1.1289 + return;
1.1290 + }
1.1291 +
1.1292 + mClickHoldTimer = do_CreateInstance("@mozilla.org/timer;1");
1.1293 + if (mClickHoldTimer) {
1.1294 + int32_t clickHoldDelay =
1.1295 + Preferences::GetInt("ui.click_hold_context_menus.delay", 500);
1.1296 + mClickHoldTimer->InitWithFuncCallback(sClickHoldCallback, this,
1.1297 + clickHoldDelay,
1.1298 + nsITimer::TYPE_ONE_SHOT);
1.1299 + }
1.1300 +} // CreateClickHoldTimer
1.1301 +
1.1302 +
1.1303 +//
1.1304 +// KillClickHoldTimer
1.1305 +//
1.1306 +// Stop the timer that would show the context menu dead in its tracks
1.1307 +//
1.1308 +void
1.1309 +EventStateManager::KillClickHoldTimer()
1.1310 +{
1.1311 + if (mClickHoldTimer) {
1.1312 + mClickHoldTimer->Cancel();
1.1313 + mClickHoldTimer = nullptr;
1.1314 + }
1.1315 +}
1.1316 +
1.1317 +
1.1318 +//
1.1319 +// sClickHoldCallback
1.1320 +//
1.1321 +// This fires after the mouse has been down for a certain length of time.
1.1322 +//
1.1323 +void
1.1324 +EventStateManager::sClickHoldCallback(nsITimer* aTimer, void* aESM)
1.1325 +{
1.1326 + nsRefPtr<EventStateManager> self = static_cast<EventStateManager*>(aESM);
1.1327 + if (self) {
1.1328 + self->FireContextClick();
1.1329 + }
1.1330 +
1.1331 + // NOTE: |aTimer| and |self->mAutoHideTimer| are invalid after calling ClosePopup();
1.1332 +
1.1333 +} // sAutoHideCallback
1.1334 +
1.1335 +
1.1336 +//
1.1337 +// FireContextClick
1.1338 +//
1.1339 +// If we're this far, our timer has fired, which means the mouse has been down
1.1340 +// for a certain period of time and has not moved enough to generate a dragGesture.
1.1341 +// We can be certain the user wants a context-click at this stage, so generate
1.1342 +// a dom event and fire it in.
1.1343 +//
1.1344 +// After the event fires, check if PreventDefault() has been set on the event which
1.1345 +// means that someone either ate the event or put up a context menu. This is our cue
1.1346 +// to stop tracking the drag gesture. If we always did this, draggable items w/out
1.1347 +// a context menu wouldn't be draggable after a certain length of time, which is
1.1348 +// _not_ what we want.
1.1349 +//
1.1350 +void
1.1351 +EventStateManager::FireContextClick()
1.1352 +{
1.1353 + if (!mGestureDownContent || !mPresContext) {
1.1354 + return;
1.1355 + }
1.1356 +
1.1357 +#ifdef XP_MACOSX
1.1358 + // Hack to ensure that we don't show a context menu when the user
1.1359 + // let go of the mouse after a long cpu-hogging operation prevented
1.1360 + // us from handling any OS events. See bug 117589.
1.1361 + if (!CGEventSourceButtonState(kCGEventSourceStateCombinedSessionState, kCGMouseButtonLeft))
1.1362 + return;
1.1363 +#endif
1.1364 +
1.1365 + nsEventStatus status = nsEventStatus_eIgnore;
1.1366 +
1.1367 + // Dispatch to the DOM. We have to fake out the ESM and tell it that the
1.1368 + // current target frame is actually where the mouseDown occurred, otherwise it
1.1369 + // will use the frame the mouse is currently over which may or may not be
1.1370 + // the same. (Note: saari and I have decided that we don't have to reset |mCurrentTarget|
1.1371 + // when we're through because no one else is doing anything more with this
1.1372 + // event and it will get reset on the very next event to the correct frame).
1.1373 + mCurrentTarget = mPresContext->GetPrimaryFrameFor(mGestureDownContent);
1.1374 + // make sure the widget sticks around
1.1375 + nsCOMPtr<nsIWidget> targetWidget;
1.1376 + if (mCurrentTarget && (targetWidget = mCurrentTarget->GetNearestWidget())) {
1.1377 + NS_ASSERTION(mPresContext == mCurrentTarget->PresContext(),
1.1378 + "a prescontext returned a primary frame that didn't belong to it?");
1.1379 +
1.1380 + // before dispatching, check that we're not on something that
1.1381 + // doesn't get a context menu
1.1382 + nsIAtom *tag = mGestureDownContent->Tag();
1.1383 + bool allowedToDispatch = true;
1.1384 +
1.1385 + if (mGestureDownContent->IsXUL()) {
1.1386 + if (tag == nsGkAtoms::scrollbar ||
1.1387 + tag == nsGkAtoms::scrollbarbutton ||
1.1388 + tag == nsGkAtoms::button)
1.1389 + allowedToDispatch = false;
1.1390 + else if (tag == nsGkAtoms::toolbarbutton) {
1.1391 + // a <toolbarbutton> that has the container attribute set
1.1392 + // will already have its own dropdown.
1.1393 + if (nsContentUtils::HasNonEmptyAttr(mGestureDownContent,
1.1394 + kNameSpaceID_None, nsGkAtoms::container)) {
1.1395 + allowedToDispatch = false;
1.1396 + } else {
1.1397 + // If the toolbar button has an open menu, don't attempt to open
1.1398 + // a second menu
1.1399 + if (mGestureDownContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::open,
1.1400 + nsGkAtoms::_true, eCaseMatters)) {
1.1401 + allowedToDispatch = false;
1.1402 + }
1.1403 + }
1.1404 + }
1.1405 + }
1.1406 + else if (mGestureDownContent->IsHTML()) {
1.1407 + nsCOMPtr<nsIFormControl> formCtrl(do_QueryInterface(mGestureDownContent));
1.1408 +
1.1409 + if (formCtrl) {
1.1410 + allowedToDispatch = formCtrl->IsTextControl(false) ||
1.1411 + formCtrl->GetType() == NS_FORM_INPUT_FILE;
1.1412 + }
1.1413 + else if (tag == nsGkAtoms::applet ||
1.1414 + tag == nsGkAtoms::embed ||
1.1415 + tag == nsGkAtoms::object) {
1.1416 + allowedToDispatch = false;
1.1417 + }
1.1418 + }
1.1419 +
1.1420 + if (allowedToDispatch) {
1.1421 + // init the event while mCurrentTarget is still good
1.1422 + WidgetMouseEvent event(true, NS_CONTEXTMENU, targetWidget,
1.1423 + WidgetMouseEvent::eReal);
1.1424 + event.clickCount = 1;
1.1425 + FillInEventFromGestureDown(&event);
1.1426 +
1.1427 + // stop selection tracking, we're in control now
1.1428 + if (mCurrentTarget)
1.1429 + {
1.1430 + nsRefPtr<nsFrameSelection> frameSel =
1.1431 + mCurrentTarget->GetFrameSelection();
1.1432 +
1.1433 + if (frameSel && frameSel->GetMouseDownState()) {
1.1434 + // note that this can cause selection changed events to fire if we're in
1.1435 + // a text field, which will null out mCurrentTarget
1.1436 + frameSel->SetMouseDownState(false);
1.1437 + }
1.1438 + }
1.1439 +
1.1440 + nsIDocument* doc = mGestureDownContent->GetCurrentDoc();
1.1441 + AutoHandlingUserInputStatePusher userInpStatePusher(true, &event, doc);
1.1442 +
1.1443 + // dispatch to DOM
1.1444 + EventDispatcher::Dispatch(mGestureDownContent, mPresContext, &event,
1.1445 + nullptr, &status);
1.1446 +
1.1447 + // We don't need to dispatch to frame handling because no frames
1.1448 + // watch NS_CONTEXTMENU except for nsMenuFrame and that's only for
1.1449 + // dismissal. That's just as well since we don't really know
1.1450 + // which frame to send it to.
1.1451 + }
1.1452 + }
1.1453 +
1.1454 + // now check if the event has been handled. If so, stop tracking a drag
1.1455 + if (status == nsEventStatus_eConsumeNoDefault) {
1.1456 + StopTrackingDragGesture();
1.1457 + }
1.1458 +
1.1459 + KillClickHoldTimer();
1.1460 +
1.1461 +} // FireContextClick
1.1462 +
1.1463 +
1.1464 +//
1.1465 +// BeginTrackingDragGesture
1.1466 +//
1.1467 +// Record that the mouse has gone down and that we should move to TRACKING state
1.1468 +// of d&d gesture tracker.
1.1469 +//
1.1470 +// We also use this to track click-hold context menus. When the mouse goes down,
1.1471 +// fire off a short timer. If the timer goes off and we have yet to fire the
1.1472 +// drag gesture (ie, the mouse hasn't moved a certain distance), then we can
1.1473 +// assume the user wants a click-hold, so fire a context-click event. We only
1.1474 +// want to cancel the drag gesture if the context-click event is handled.
1.1475 +//
1.1476 +void
1.1477 +EventStateManager::BeginTrackingDragGesture(nsPresContext* aPresContext,
1.1478 + WidgetMouseEvent* inDownEvent,
1.1479 + nsIFrame* inDownFrame)
1.1480 +{
1.1481 + if (!inDownEvent->widget)
1.1482 + return;
1.1483 +
1.1484 + // Note that |inDownEvent| could be either a mouse down event or a
1.1485 + // synthesized mouse move event.
1.1486 + mGestureDownPoint = inDownEvent->refPoint +
1.1487 + LayoutDeviceIntPoint::FromUntyped(inDownEvent->widget->WidgetToScreenOffset());
1.1488 +
1.1489 + inDownFrame->GetContentForEvent(inDownEvent,
1.1490 + getter_AddRefs(mGestureDownContent));
1.1491 +
1.1492 + mGestureDownFrameOwner = inDownFrame->GetContent();
1.1493 + mGestureModifiers = inDownEvent->modifiers;
1.1494 + mGestureDownButtons = inDownEvent->buttons;
1.1495 +
1.1496 + if (Prefs::ClickHoldContextMenu()) {
1.1497 + // fire off a timer to track click-hold
1.1498 + CreateClickHoldTimer(aPresContext, inDownFrame, inDownEvent);
1.1499 + }
1.1500 +}
1.1501 +
1.1502 +
1.1503 +//
1.1504 +// StopTrackingDragGesture
1.1505 +//
1.1506 +// Record that the mouse has gone back up so that we should leave the TRACKING
1.1507 +// state of d&d gesture tracker and return to the START state.
1.1508 +//
1.1509 +void
1.1510 +EventStateManager::StopTrackingDragGesture()
1.1511 +{
1.1512 + mGestureDownContent = nullptr;
1.1513 + mGestureDownFrameOwner = nullptr;
1.1514 +}
1.1515 +
1.1516 +void
1.1517 +EventStateManager::FillInEventFromGestureDown(WidgetMouseEvent* aEvent)
1.1518 +{
1.1519 + NS_ASSERTION(aEvent->widget == mCurrentTarget->GetNearestWidget(),
1.1520 + "Incorrect widget in event");
1.1521 +
1.1522 + // Set the coordinates in the new event to the coordinates of
1.1523 + // the old event, adjusted for the fact that the widget might be
1.1524 + // different
1.1525 + aEvent->refPoint = mGestureDownPoint -
1.1526 + LayoutDeviceIntPoint::FromUntyped(aEvent->widget->WidgetToScreenOffset());
1.1527 + aEvent->modifiers = mGestureModifiers;
1.1528 + aEvent->buttons = mGestureDownButtons;
1.1529 +}
1.1530 +
1.1531 +//
1.1532 +// GenerateDragGesture
1.1533 +//
1.1534 +// If we're in the TRACKING state of the d&d gesture tracker, check the current position
1.1535 +// of the mouse in relation to the old one. If we've moved a sufficient amount from
1.1536 +// the mouse down, then fire off a drag gesture event.
1.1537 +void
1.1538 +EventStateManager::GenerateDragGesture(nsPresContext* aPresContext,
1.1539 + WidgetMouseEvent* aEvent)
1.1540 +{
1.1541 + NS_ASSERTION(aPresContext, "This shouldn't happen.");
1.1542 + if (IsTrackingDragGesture()) {
1.1543 + mCurrentTarget = mGestureDownFrameOwner->GetPrimaryFrame();
1.1544 +
1.1545 + if (!mCurrentTarget) {
1.1546 + StopTrackingDragGesture();
1.1547 + return;
1.1548 + }
1.1549 +
1.1550 + // Check if selection is tracking drag gestures, if so
1.1551 + // don't interfere!
1.1552 + if (mCurrentTarget)
1.1553 + {
1.1554 + nsRefPtr<nsFrameSelection> frameSel = mCurrentTarget->GetFrameSelection();
1.1555 + if (frameSel && frameSel->GetMouseDownState()) {
1.1556 + StopTrackingDragGesture();
1.1557 + return;
1.1558 + }
1.1559 + }
1.1560 +
1.1561 + // If non-native code is capturing the mouse don't start a drag.
1.1562 + if (nsIPresShell::IsMouseCapturePreventingDrag()) {
1.1563 + StopTrackingDragGesture();
1.1564 + return;
1.1565 + }
1.1566 +
1.1567 + static int32_t pixelThresholdX = 0;
1.1568 + static int32_t pixelThresholdY = 0;
1.1569 +
1.1570 + if (!pixelThresholdX) {
1.1571 + pixelThresholdX =
1.1572 + LookAndFeel::GetInt(LookAndFeel::eIntID_DragThresholdX, 0);
1.1573 + pixelThresholdY =
1.1574 + LookAndFeel::GetInt(LookAndFeel::eIntID_DragThresholdY, 0);
1.1575 + if (!pixelThresholdX)
1.1576 + pixelThresholdX = 5;
1.1577 + if (!pixelThresholdY)
1.1578 + pixelThresholdY = 5;
1.1579 + }
1.1580 +
1.1581 + // fire drag gesture if mouse has moved enough
1.1582 + LayoutDeviceIntPoint pt = aEvent->refPoint +
1.1583 + LayoutDeviceIntPoint::FromUntyped(aEvent->widget->WidgetToScreenOffset());
1.1584 + if (DeprecatedAbs(pt.x - mGestureDownPoint.x) > pixelThresholdX ||
1.1585 + DeprecatedAbs(pt.y - mGestureDownPoint.y) > pixelThresholdY) {
1.1586 + if (Prefs::ClickHoldContextMenu()) {
1.1587 + // stop the click-hold before we fire off the drag gesture, in case
1.1588 + // it takes a long time
1.1589 + KillClickHoldTimer();
1.1590 + }
1.1591 +
1.1592 + nsCOMPtr<nsISupports> container = aPresContext->GetContainerWeak();
1.1593 + nsCOMPtr<nsPIDOMWindow> window = do_GetInterface(container);
1.1594 + if (!window)
1.1595 + return;
1.1596 +
1.1597 + nsRefPtr<DataTransfer> dataTransfer =
1.1598 + new DataTransfer(window, NS_DRAGDROP_START, false, -1);
1.1599 +
1.1600 + nsCOMPtr<nsISelection> selection;
1.1601 + nsCOMPtr<nsIContent> eventContent, targetContent;
1.1602 + mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(eventContent));
1.1603 + if (eventContent)
1.1604 + DetermineDragTarget(window, eventContent, dataTransfer,
1.1605 + getter_AddRefs(selection), getter_AddRefs(targetContent));
1.1606 +
1.1607 + // Stop tracking the drag gesture now. This should stop us from
1.1608 + // reentering GenerateDragGesture inside DOM event processing.
1.1609 + StopTrackingDragGesture();
1.1610 +
1.1611 + if (!targetContent)
1.1612 + return;
1.1613 +
1.1614 + // Use our targetContent, now that we've determined it, as the
1.1615 + // parent object of the DataTransfer.
1.1616 + dataTransfer->SetParentObject(targetContent);
1.1617 +
1.1618 + sLastDragOverFrame = nullptr;
1.1619 + nsCOMPtr<nsIWidget> widget = mCurrentTarget->GetNearestWidget();
1.1620 +
1.1621 + // get the widget from the target frame
1.1622 + WidgetDragEvent startEvent(aEvent->mFlags.mIsTrusted,
1.1623 + NS_DRAGDROP_START, widget);
1.1624 + FillInEventFromGestureDown(&startEvent);
1.1625 +
1.1626 + WidgetDragEvent gestureEvent(aEvent->mFlags.mIsTrusted,
1.1627 + NS_DRAGDROP_GESTURE, widget);
1.1628 + FillInEventFromGestureDown(&gestureEvent);
1.1629 +
1.1630 + startEvent.dataTransfer = gestureEvent.dataTransfer = dataTransfer;
1.1631 + startEvent.inputSource = gestureEvent.inputSource = aEvent->inputSource;
1.1632 +
1.1633 + // Dispatch to the DOM. By setting mCurrentTarget we are faking
1.1634 + // out the ESM and telling it that the current target frame is
1.1635 + // actually where the mouseDown occurred, otherwise it will use
1.1636 + // the frame the mouse is currently over which may or may not be
1.1637 + // the same. (Note: saari and I have decided that we don't have
1.1638 + // to reset |mCurrentTarget| when we're through because no one
1.1639 + // else is doing anything more with this event and it will get
1.1640 + // reset on the very next event to the correct frame).
1.1641 +
1.1642 + // Hold onto old target content through the event and reset after.
1.1643 + nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
1.1644 +
1.1645 + // Set the current target to the content for the mouse down
1.1646 + mCurrentTargetContent = targetContent;
1.1647 +
1.1648 + // Dispatch both the dragstart and draggesture events to the DOM. For
1.1649 + // elements in an editor, only fire the draggesture event so that the
1.1650 + // editor code can handle it but content doesn't see a dragstart.
1.1651 + nsEventStatus status = nsEventStatus_eIgnore;
1.1652 + EventDispatcher::Dispatch(targetContent, aPresContext, &startEvent,
1.1653 + nullptr, &status);
1.1654 +
1.1655 + WidgetDragEvent* event = &startEvent;
1.1656 + if (status != nsEventStatus_eConsumeNoDefault) {
1.1657 + status = nsEventStatus_eIgnore;
1.1658 + EventDispatcher::Dispatch(targetContent, aPresContext, &gestureEvent,
1.1659 + nullptr, &status);
1.1660 + event = &gestureEvent;
1.1661 + }
1.1662 +
1.1663 + nsCOMPtr<nsIObserverService> observerService =
1.1664 + mozilla::services::GetObserverService();
1.1665 + // Emit observer event to allow addons to modify the DataTransfer object.
1.1666 + if (observerService) {
1.1667 + observerService->NotifyObservers(dataTransfer,
1.1668 + "on-datatransfer-available",
1.1669 + nullptr);
1.1670 + }
1.1671 +
1.1672 + // now that the dataTransfer has been updated in the dragstart and
1.1673 + // draggesture events, make it read only so that the data doesn't
1.1674 + // change during the drag.
1.1675 + dataTransfer->SetReadOnly();
1.1676 +
1.1677 + if (status != nsEventStatus_eConsumeNoDefault) {
1.1678 + bool dragStarted = DoDefaultDragStart(aPresContext, event, dataTransfer,
1.1679 + targetContent, selection);
1.1680 + if (dragStarted) {
1.1681 + sActiveESM = nullptr;
1.1682 + aEvent->mFlags.mPropagationStopped = true;
1.1683 + }
1.1684 + }
1.1685 +
1.1686 + // Note that frame event handling doesn't care about NS_DRAGDROP_GESTURE,
1.1687 + // which is just as well since we don't really know which frame to
1.1688 + // send it to
1.1689 +
1.1690 + // Reset mCurretTargetContent to what it was
1.1691 + mCurrentTargetContent = targetBeforeEvent;
1.1692 + }
1.1693 +
1.1694 + // Now flush all pending notifications, for better responsiveness
1.1695 + // while dragging.
1.1696 + FlushPendingEvents(aPresContext);
1.1697 + }
1.1698 +} // GenerateDragGesture
1.1699 +
1.1700 +void
1.1701 +EventStateManager::DetermineDragTarget(nsPIDOMWindow* aWindow,
1.1702 + nsIContent* aSelectionTarget,
1.1703 + DataTransfer* aDataTransfer,
1.1704 + nsISelection** aSelection,
1.1705 + nsIContent** aTargetNode)
1.1706 +{
1.1707 + *aTargetNode = nullptr;
1.1708 +
1.1709 + // GetDragData determines if a selection, link or image in the content
1.1710 + // should be dragged, and places the data associated with the drag in the
1.1711 + // data transfer.
1.1712 + // mGestureDownContent is the node where the mousedown event for the drag
1.1713 + // occurred, and aSelectionTarget is the node to use when a selection is used
1.1714 + bool canDrag;
1.1715 + nsCOMPtr<nsIContent> dragDataNode;
1.1716 + bool wasAlt = (mGestureModifiers & MODIFIER_ALT) != 0;
1.1717 + nsresult rv = nsContentAreaDragDrop::GetDragData(aWindow, mGestureDownContent,
1.1718 + aSelectionTarget, wasAlt,
1.1719 + aDataTransfer, &canDrag, aSelection,
1.1720 + getter_AddRefs(dragDataNode));
1.1721 + if (NS_FAILED(rv) || !canDrag)
1.1722 + return;
1.1723 +
1.1724 + // if GetDragData returned a node, use that as the node being dragged.
1.1725 + // Otherwise, if a selection is being dragged, use the node within the
1.1726 + // selection that was dragged. Otherwise, just use the mousedown target.
1.1727 + nsIContent* dragContent = mGestureDownContent;
1.1728 + if (dragDataNode)
1.1729 + dragContent = dragDataNode;
1.1730 + else if (*aSelection)
1.1731 + dragContent = aSelectionTarget;
1.1732 +
1.1733 + nsIContent* originalDragContent = dragContent;
1.1734 +
1.1735 + // If a selection isn't being dragged, look for an ancestor with the
1.1736 + // draggable property set. If one is found, use that as the target of the
1.1737 + // drag instead of the node that was clicked on. If a draggable node wasn't
1.1738 + // found, just use the clicked node.
1.1739 + if (!*aSelection) {
1.1740 + while (dragContent) {
1.1741 + nsCOMPtr<nsIDOMHTMLElement> htmlElement = do_QueryInterface(dragContent);
1.1742 + if (htmlElement) {
1.1743 + bool draggable = false;
1.1744 + htmlElement->GetDraggable(&draggable);
1.1745 + if (draggable)
1.1746 + break;
1.1747 + }
1.1748 + else {
1.1749 + nsCOMPtr<nsIDOMXULElement> xulElement = do_QueryInterface(dragContent);
1.1750 + if (xulElement) {
1.1751 + // All XUL elements are draggable, so if a XUL element is
1.1752 + // encountered, stop looking for draggable nodes and just use the
1.1753 + // original clicked node instead.
1.1754 + // XXXndeakin
1.1755 + // In the future, we will want to improve this so that XUL has a
1.1756 + // better way to specify whether something is draggable than just
1.1757 + // on/off.
1.1758 + dragContent = mGestureDownContent;
1.1759 + break;
1.1760 + }
1.1761 + // otherwise, it's not an HTML or XUL element, so just keep looking
1.1762 + }
1.1763 + dragContent = dragContent->GetParent();
1.1764 + }
1.1765 + }
1.1766 +
1.1767 + // if no node in the hierarchy was found to drag, but the GetDragData method
1.1768 + // returned a node, use that returned node. Otherwise, nothing is draggable.
1.1769 + if (!dragContent && dragDataNode)
1.1770 + dragContent = dragDataNode;
1.1771 +
1.1772 + if (dragContent) {
1.1773 + // if an ancestor node was used instead, clear the drag data
1.1774 + // XXXndeakin rework this a bit. Find a way to just not call GetDragData if we don't need to.
1.1775 + if (dragContent != originalDragContent)
1.1776 + aDataTransfer->ClearAll();
1.1777 + *aTargetNode = dragContent;
1.1778 + NS_ADDREF(*aTargetNode);
1.1779 + }
1.1780 +}
1.1781 +
1.1782 +bool
1.1783 +EventStateManager::DoDefaultDragStart(nsPresContext* aPresContext,
1.1784 + WidgetDragEvent* aDragEvent,
1.1785 + DataTransfer* aDataTransfer,
1.1786 + nsIContent* aDragTarget,
1.1787 + nsISelection* aSelection)
1.1788 +{
1.1789 + nsCOMPtr<nsIDragService> dragService =
1.1790 + do_GetService("@mozilla.org/widget/dragservice;1");
1.1791 + if (!dragService)
1.1792 + return false;
1.1793 +
1.1794 + // Default handling for the draggesture/dragstart event.
1.1795 + //
1.1796 + // First, check if a drag session already exists. This means that the drag
1.1797 + // service was called directly within a draggesture handler. In this case,
1.1798 + // don't do anything more, as it is assumed that the handler is managing
1.1799 + // drag and drop manually. Make sure to return true to indicate that a drag
1.1800 + // began.
1.1801 + nsCOMPtr<nsIDragSession> dragSession;
1.1802 + dragService->GetCurrentSession(getter_AddRefs(dragSession));
1.1803 + if (dragSession)
1.1804 + return true;
1.1805 +
1.1806 + // No drag session is currently active, so check if a handler added
1.1807 + // any items to be dragged. If not, there isn't anything to drag.
1.1808 + uint32_t count = 0;
1.1809 + if (aDataTransfer)
1.1810 + aDataTransfer->GetMozItemCount(&count);
1.1811 + if (!count)
1.1812 + return false;
1.1813 +
1.1814 + // Get the target being dragged, which may not be the same as the
1.1815 + // target of the mouse event. If one wasn't set in the
1.1816 + // aDataTransfer during the event handler, just use the original
1.1817 + // target instead.
1.1818 + nsCOMPtr<nsIContent> dragTarget = aDataTransfer->GetDragTarget();
1.1819 + if (!dragTarget) {
1.1820 + dragTarget = aDragTarget;
1.1821 + if (!dragTarget)
1.1822 + return false;
1.1823 + }
1.1824 +
1.1825 + // check which drag effect should initially be used. If the effect was not
1.1826 + // set, just use all actions, otherwise Windows won't allow a drop.
1.1827 + uint32_t action;
1.1828 + aDataTransfer->GetEffectAllowedInt(&action);
1.1829 + if (action == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED)
1.1830 + action = nsIDragService::DRAGDROP_ACTION_COPY |
1.1831 + nsIDragService::DRAGDROP_ACTION_MOVE |
1.1832 + nsIDragService::DRAGDROP_ACTION_LINK;
1.1833 +
1.1834 + // get any custom drag image that was set
1.1835 + int32_t imageX, imageY;
1.1836 + Element* dragImage = aDataTransfer->GetDragImage(&imageX, &imageY);
1.1837 +
1.1838 + nsCOMPtr<nsISupportsArray> transArray =
1.1839 + aDataTransfer->GetTransferables(dragTarget->AsDOMNode());
1.1840 + if (!transArray)
1.1841 + return false;
1.1842 +
1.1843 + // XXXndeakin don't really want to create a new drag DOM event
1.1844 + // here, but we need something to pass to the InvokeDragSession
1.1845 + // methods.
1.1846 + nsCOMPtr<nsIDOMEvent> domEvent;
1.1847 + NS_NewDOMDragEvent(getter_AddRefs(domEvent), dragTarget,
1.1848 + aPresContext, aDragEvent);
1.1849 +
1.1850 + nsCOMPtr<nsIDOMDragEvent> domDragEvent = do_QueryInterface(domEvent);
1.1851 + // if creating a drag event failed, starting a drag session will
1.1852 + // just fail.
1.1853 +
1.1854 + // Use InvokeDragSessionWithSelection if a selection is being dragged,
1.1855 + // such that the image can be generated from the selected text. However,
1.1856 + // use InvokeDragSessionWithImage if a custom image was set or something
1.1857 + // other than a selection is being dragged.
1.1858 + if (!dragImage && aSelection) {
1.1859 + dragService->InvokeDragSessionWithSelection(aSelection, transArray,
1.1860 + action, domDragEvent,
1.1861 + aDataTransfer);
1.1862 + }
1.1863 + else {
1.1864 + // if dragging within a XUL tree and no custom drag image was
1.1865 + // set, the region argument to InvokeDragSessionWithImage needs
1.1866 + // to be set to the area encompassing the selected rows of the
1.1867 + // tree to ensure that the drag feedback gets clipped to those
1.1868 + // rows. For other content, region should be null.
1.1869 + nsCOMPtr<nsIScriptableRegion> region;
1.1870 +#ifdef MOZ_XUL
1.1871 + if (dragTarget && !dragImage) {
1.1872 + if (dragTarget->NodeInfo()->Equals(nsGkAtoms::treechildren,
1.1873 + kNameSpaceID_XUL)) {
1.1874 + nsTreeBodyFrame* treeBody =
1.1875 + do_QueryFrame(dragTarget->GetPrimaryFrame());
1.1876 + if (treeBody) {
1.1877 + treeBody->GetSelectionRegion(getter_AddRefs(region));
1.1878 + }
1.1879 + }
1.1880 + }
1.1881 +#endif
1.1882 +
1.1883 + dragService->InvokeDragSessionWithImage(dragTarget->AsDOMNode(), transArray,
1.1884 + region, action,
1.1885 + dragImage ? dragImage->AsDOMNode() :
1.1886 + nullptr,
1.1887 + imageX,
1.1888 + imageY, domDragEvent,
1.1889 + aDataTransfer);
1.1890 + }
1.1891 +
1.1892 + return true;
1.1893 +}
1.1894 +
1.1895 +nsresult
1.1896 +EventStateManager::GetMarkupDocumentViewer(nsIMarkupDocumentViewer** aMv)
1.1897 +{
1.1898 + *aMv = nullptr;
1.1899 +
1.1900 + nsIFocusManager* fm = nsFocusManager::GetFocusManager();
1.1901 + if(!fm) return NS_ERROR_FAILURE;
1.1902 +
1.1903 + nsCOMPtr<nsIDOMWindow> focusedWindow;
1.1904 + fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
1.1905 +
1.1906 + nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(focusedWindow);
1.1907 + if(!ourWindow) return NS_ERROR_FAILURE;
1.1908 +
1.1909 + nsIDOMWindow *rootWindow = ourWindow->GetPrivateRoot();
1.1910 + if(!rootWindow) return NS_ERROR_FAILURE;
1.1911 +
1.1912 + nsCOMPtr<nsIDOMWindow> contentWindow;
1.1913 + rootWindow->GetContent(getter_AddRefs(contentWindow));
1.1914 + if(!contentWindow) return NS_ERROR_FAILURE;
1.1915 +
1.1916 + nsIDocument *doc = GetDocumentFromWindow(contentWindow);
1.1917 + if(!doc) return NS_ERROR_FAILURE;
1.1918 +
1.1919 + nsIPresShell *presShell = doc->GetShell();
1.1920 + if(!presShell) return NS_ERROR_FAILURE;
1.1921 + nsPresContext *presContext = presShell->GetPresContext();
1.1922 + if(!presContext) return NS_ERROR_FAILURE;
1.1923 +
1.1924 + nsCOMPtr<nsIDocShell> docshell(presContext->GetDocShell());
1.1925 + if(!docshell) return NS_ERROR_FAILURE;
1.1926 +
1.1927 + nsCOMPtr<nsIContentViewer> cv;
1.1928 + docshell->GetContentViewer(getter_AddRefs(cv));
1.1929 + if(!cv) return NS_ERROR_FAILURE;
1.1930 +
1.1931 + nsCOMPtr<nsIMarkupDocumentViewer> mv(do_QueryInterface(cv));
1.1932 + if(!mv) return NS_ERROR_FAILURE;
1.1933 +
1.1934 + *aMv = mv;
1.1935 + NS_IF_ADDREF(*aMv);
1.1936 +
1.1937 + return NS_OK;
1.1938 +}
1.1939 +
1.1940 +nsresult
1.1941 +EventStateManager::ChangeTextSize(int32_t change)
1.1942 +{
1.1943 + nsCOMPtr<nsIMarkupDocumentViewer> mv;
1.1944 + nsresult rv = GetMarkupDocumentViewer(getter_AddRefs(mv));
1.1945 + NS_ENSURE_SUCCESS(rv, rv);
1.1946 +
1.1947 + float textzoom;
1.1948 + float zoomMin = ((float)Preferences::GetInt("zoom.minPercent", 50)) / 100;
1.1949 + float zoomMax = ((float)Preferences::GetInt("zoom.maxPercent", 300)) / 100;
1.1950 + mv->GetTextZoom(&textzoom);
1.1951 + textzoom += ((float)change) / 10;
1.1952 + if (textzoom < zoomMin)
1.1953 + textzoom = zoomMin;
1.1954 + else if (textzoom > zoomMax)
1.1955 + textzoom = zoomMax;
1.1956 + mv->SetTextZoom(textzoom);
1.1957 +
1.1958 + return NS_OK;
1.1959 +}
1.1960 +
1.1961 +nsresult
1.1962 +EventStateManager::ChangeFullZoom(int32_t change)
1.1963 +{
1.1964 + nsCOMPtr<nsIMarkupDocumentViewer> mv;
1.1965 + nsresult rv = GetMarkupDocumentViewer(getter_AddRefs(mv));
1.1966 + NS_ENSURE_SUCCESS(rv, rv);
1.1967 +
1.1968 + float fullzoom;
1.1969 + float zoomMin = ((float)Preferences::GetInt("zoom.minPercent", 50)) / 100;
1.1970 + float zoomMax = ((float)Preferences::GetInt("zoom.maxPercent", 300)) / 100;
1.1971 + mv->GetFullZoom(&fullzoom);
1.1972 + fullzoom += ((float)change) / 10;
1.1973 + if (fullzoom < zoomMin)
1.1974 + fullzoom = zoomMin;
1.1975 + else if (fullzoom > zoomMax)
1.1976 + fullzoom = zoomMax;
1.1977 + mv->SetFullZoom(fullzoom);
1.1978 +
1.1979 + return NS_OK;
1.1980 +}
1.1981 +
1.1982 +void
1.1983 +EventStateManager::DoScrollHistory(int32_t direction)
1.1984 +{
1.1985 + nsCOMPtr<nsISupports> pcContainer(mPresContext->GetContainerWeak());
1.1986 + if (pcContainer) {
1.1987 + nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(pcContainer));
1.1988 + if (webNav) {
1.1989 + // positive direction to go back one step, nonpositive to go forward
1.1990 + if (direction > 0)
1.1991 + webNav->GoBack();
1.1992 + else
1.1993 + webNav->GoForward();
1.1994 + }
1.1995 + }
1.1996 +}
1.1997 +
1.1998 +void
1.1999 +EventStateManager::DoScrollZoom(nsIFrame* aTargetFrame,
1.2000 + int32_t adjustment)
1.2001 +{
1.2002 + // Exclude form controls and content in chrome docshells.
1.2003 + nsIContent *content = aTargetFrame->GetContent();
1.2004 + if (content &&
1.2005 + !content->IsNodeOfType(nsINode::eHTML_FORM_CONTROL) &&
1.2006 + !nsContentUtils::IsInChromeDocshell(content->OwnerDoc()))
1.2007 + {
1.2008 + // positive adjustment to decrease zoom, negative to increase
1.2009 + int32_t change = (adjustment > 0) ? -1 : 1;
1.2010 +
1.2011 + if (Preferences::GetBool("browser.zoom.full") || content->GetCurrentDoc()->IsSyntheticDocument()) {
1.2012 + ChangeFullZoom(change);
1.2013 + } else {
1.2014 + ChangeTextSize(change);
1.2015 + }
1.2016 + }
1.2017 +}
1.2018 +
1.2019 +static nsIFrame*
1.2020 +GetParentFrameToScroll(nsIFrame* aFrame)
1.2021 +{
1.2022 + if (!aFrame)
1.2023 + return nullptr;
1.2024 +
1.2025 + if (aFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_FIXED &&
1.2026 + nsLayoutUtils::IsReallyFixedPos(aFrame))
1.2027 + return aFrame->PresContext()->GetPresShell()->GetRootScrollFrame();
1.2028 +
1.2029 + return aFrame->GetParent();
1.2030 +}
1.2031 +
1.2032 +void
1.2033 +EventStateManager::DispatchLegacyMouseScrollEvents(nsIFrame* aTargetFrame,
1.2034 + WidgetWheelEvent* aEvent,
1.2035 + nsEventStatus* aStatus)
1.2036 +{
1.2037 + MOZ_ASSERT(aEvent);
1.2038 + MOZ_ASSERT(aStatus);
1.2039 +
1.2040 + if (!aTargetFrame || *aStatus == nsEventStatus_eConsumeNoDefault) {
1.2041 + return;
1.2042 + }
1.2043 +
1.2044 + // Ignore mouse wheel transaction for computing legacy mouse wheel
1.2045 + // events' delta value.
1.2046 + nsIScrollableFrame* scrollTarget =
1.2047 + ComputeScrollTarget(aTargetFrame, aEvent,
1.2048 + COMPUTE_LEGACY_MOUSE_SCROLL_EVENT_TARGET);
1.2049 +
1.2050 + nsIFrame* scrollFrame = do_QueryFrame(scrollTarget);
1.2051 + nsPresContext* pc =
1.2052 + scrollFrame ? scrollFrame->PresContext() : aTargetFrame->PresContext();
1.2053 +
1.2054 + // DOM event's delta vales are computed from CSS pixels.
1.2055 + nsSize scrollAmount = GetScrollAmount(pc, aEvent, scrollTarget);
1.2056 + nsIntSize scrollAmountInCSSPixels(
1.2057 + nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.width),
1.2058 + nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.height));
1.2059 +
1.2060 + // XXX We don't deal with fractional amount in legacy event, though the
1.2061 + // default action handler (DoScrollText()) deals with it.
1.2062 + // If we implemented such strict computation, we would need additional
1.2063 + // accumulated delta values. It would made the code more complicated.
1.2064 + // And also it would computes different delta values from older version.
1.2065 + // It doesn't make sense to implement such code for legacy events and
1.2066 + // rare cases.
1.2067 + int32_t scrollDeltaX, scrollDeltaY, pixelDeltaX, pixelDeltaY;
1.2068 + switch (aEvent->deltaMode) {
1.2069 + case nsIDOMWheelEvent::DOM_DELTA_PAGE:
1.2070 + scrollDeltaX =
1.2071 + !aEvent->lineOrPageDeltaX ? 0 :
1.2072 + (aEvent->lineOrPageDeltaX > 0 ? nsIDOMUIEvent::SCROLL_PAGE_DOWN :
1.2073 + nsIDOMUIEvent::SCROLL_PAGE_UP);
1.2074 + scrollDeltaY =
1.2075 + !aEvent->lineOrPageDeltaY ? 0 :
1.2076 + (aEvent->lineOrPageDeltaY > 0 ? nsIDOMUIEvent::SCROLL_PAGE_DOWN :
1.2077 + nsIDOMUIEvent::SCROLL_PAGE_UP);
1.2078 + pixelDeltaX = RoundDown(aEvent->deltaX * scrollAmountInCSSPixels.width);
1.2079 + pixelDeltaY = RoundDown(aEvent->deltaY * scrollAmountInCSSPixels.height);
1.2080 + break;
1.2081 +
1.2082 + case nsIDOMWheelEvent::DOM_DELTA_LINE:
1.2083 + scrollDeltaX = aEvent->lineOrPageDeltaX;
1.2084 + scrollDeltaY = aEvent->lineOrPageDeltaY;
1.2085 + pixelDeltaX = RoundDown(aEvent->deltaX * scrollAmountInCSSPixels.width);
1.2086 + pixelDeltaY = RoundDown(aEvent->deltaY * scrollAmountInCSSPixels.height);
1.2087 + break;
1.2088 +
1.2089 + case nsIDOMWheelEvent::DOM_DELTA_PIXEL:
1.2090 + scrollDeltaX = aEvent->lineOrPageDeltaX;
1.2091 + scrollDeltaY = aEvent->lineOrPageDeltaY;
1.2092 + pixelDeltaX = RoundDown(aEvent->deltaX);
1.2093 + pixelDeltaY = RoundDown(aEvent->deltaY);
1.2094 + break;
1.2095 +
1.2096 + default:
1.2097 + MOZ_CRASH("Invalid deltaMode value comes");
1.2098 + }
1.2099 +
1.2100 + // Send the legacy events in following order:
1.2101 + // 1. Vertical scroll
1.2102 + // 2. Vertical pixel scroll (even if #1 isn't consumed)
1.2103 + // 3. Horizontal scroll (even if #1 and/or #2 are consumed)
1.2104 + // 4. Horizontal pixel scroll (even if #3 isn't consumed)
1.2105 +
1.2106 + nsWeakFrame targetFrame(aTargetFrame);
1.2107 +
1.2108 + MOZ_ASSERT(*aStatus != nsEventStatus_eConsumeNoDefault &&
1.2109 + !aEvent->mFlags.mDefaultPrevented,
1.2110 + "If you make legacy events dispatched for default prevented wheel "
1.2111 + "event, you need to initialize stateX and stateY");
1.2112 + EventState stateX, stateY;
1.2113 + if (scrollDeltaY) {
1.2114 + SendLineScrollEvent(aTargetFrame, aEvent, stateY,
1.2115 + scrollDeltaY, DELTA_DIRECTION_Y);
1.2116 + if (!targetFrame.IsAlive()) {
1.2117 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.2118 + return;
1.2119 + }
1.2120 + }
1.2121 +
1.2122 + if (pixelDeltaY) {
1.2123 + SendPixelScrollEvent(aTargetFrame, aEvent, stateY,
1.2124 + pixelDeltaY, DELTA_DIRECTION_Y);
1.2125 + if (!targetFrame.IsAlive()) {
1.2126 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.2127 + return;
1.2128 + }
1.2129 + }
1.2130 +
1.2131 + if (scrollDeltaX) {
1.2132 + SendLineScrollEvent(aTargetFrame, aEvent, stateX,
1.2133 + scrollDeltaX, DELTA_DIRECTION_X);
1.2134 + if (!targetFrame.IsAlive()) {
1.2135 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.2136 + return;
1.2137 + }
1.2138 + }
1.2139 +
1.2140 + if (pixelDeltaX) {
1.2141 + SendPixelScrollEvent(aTargetFrame, aEvent, stateX,
1.2142 + pixelDeltaX, DELTA_DIRECTION_X);
1.2143 + if (!targetFrame.IsAlive()) {
1.2144 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.2145 + return;
1.2146 + }
1.2147 + }
1.2148 +
1.2149 + if (stateY.mDefaultPrevented || stateX.mDefaultPrevented) {
1.2150 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.2151 + aEvent->mFlags.mDefaultPrevented = true;
1.2152 + aEvent->mFlags.mDefaultPreventedByContent |=
1.2153 + stateY.mDefaultPreventedByContent || stateX.mDefaultPreventedByContent;
1.2154 + }
1.2155 +}
1.2156 +
1.2157 +void
1.2158 +EventStateManager::SendLineScrollEvent(nsIFrame* aTargetFrame,
1.2159 + WidgetWheelEvent* aEvent,
1.2160 + EventState& aState,
1.2161 + int32_t aDelta,
1.2162 + DeltaDirection aDeltaDirection)
1.2163 +{
1.2164 + nsCOMPtr<nsIContent> targetContent = aTargetFrame->GetContent();
1.2165 + if (!targetContent)
1.2166 + targetContent = GetFocusedContent();
1.2167 + if (!targetContent)
1.2168 + return;
1.2169 +
1.2170 + while (targetContent->IsNodeOfType(nsINode::eTEXT)) {
1.2171 + targetContent = targetContent->GetParent();
1.2172 + }
1.2173 +
1.2174 + WidgetMouseScrollEvent event(aEvent->mFlags.mIsTrusted, NS_MOUSE_SCROLL,
1.2175 + aEvent->widget);
1.2176 + event.mFlags.mDefaultPrevented = aState.mDefaultPrevented;
1.2177 + event.mFlags.mDefaultPreventedByContent = aState.mDefaultPreventedByContent;
1.2178 + event.refPoint = aEvent->refPoint;
1.2179 + event.widget = aEvent->widget;
1.2180 + event.time = aEvent->time;
1.2181 + event.modifiers = aEvent->modifiers;
1.2182 + event.buttons = aEvent->buttons;
1.2183 + event.isHorizontal = (aDeltaDirection == DELTA_DIRECTION_X);
1.2184 + event.delta = aDelta;
1.2185 + event.inputSource = aEvent->inputSource;
1.2186 +
1.2187 + nsEventStatus status = nsEventStatus_eIgnore;
1.2188 + EventDispatcher::Dispatch(targetContent, aTargetFrame->PresContext(),
1.2189 + &event, nullptr, &status);
1.2190 + aState.mDefaultPrevented =
1.2191 + event.mFlags.mDefaultPrevented || status == nsEventStatus_eConsumeNoDefault;
1.2192 + aState.mDefaultPreventedByContent = event.mFlags.mDefaultPreventedByContent;
1.2193 +}
1.2194 +
1.2195 +void
1.2196 +EventStateManager::SendPixelScrollEvent(nsIFrame* aTargetFrame,
1.2197 + WidgetWheelEvent* aEvent,
1.2198 + EventState& aState,
1.2199 + int32_t aPixelDelta,
1.2200 + DeltaDirection aDeltaDirection)
1.2201 +{
1.2202 + nsCOMPtr<nsIContent> targetContent = aTargetFrame->GetContent();
1.2203 + if (!targetContent) {
1.2204 + targetContent = GetFocusedContent();
1.2205 + if (!targetContent)
1.2206 + return;
1.2207 + }
1.2208 +
1.2209 + while (targetContent->IsNodeOfType(nsINode::eTEXT)) {
1.2210 + targetContent = targetContent->GetParent();
1.2211 + }
1.2212 +
1.2213 + WidgetMouseScrollEvent event(aEvent->mFlags.mIsTrusted, NS_MOUSE_PIXEL_SCROLL,
1.2214 + aEvent->widget);
1.2215 + event.mFlags.mDefaultPrevented = aState.mDefaultPrevented;
1.2216 + event.mFlags.mDefaultPreventedByContent = aState.mDefaultPreventedByContent;
1.2217 + event.refPoint = aEvent->refPoint;
1.2218 + event.widget = aEvent->widget;
1.2219 + event.time = aEvent->time;
1.2220 + event.modifiers = aEvent->modifiers;
1.2221 + event.buttons = aEvent->buttons;
1.2222 + event.isHorizontal = (aDeltaDirection == DELTA_DIRECTION_X);
1.2223 + event.delta = aPixelDelta;
1.2224 + event.inputSource = aEvent->inputSource;
1.2225 +
1.2226 + nsEventStatus status = nsEventStatus_eIgnore;
1.2227 + EventDispatcher::Dispatch(targetContent, aTargetFrame->PresContext(),
1.2228 + &event, nullptr, &status);
1.2229 + aState.mDefaultPrevented =
1.2230 + event.mFlags.mDefaultPrevented || status == nsEventStatus_eConsumeNoDefault;
1.2231 + aState.mDefaultPreventedByContent = event.mFlags.mDefaultPreventedByContent;
1.2232 +}
1.2233 +
1.2234 +nsIScrollableFrame*
1.2235 +EventStateManager::ComputeScrollTarget(nsIFrame* aTargetFrame,
1.2236 + WidgetWheelEvent* aEvent,
1.2237 + ComputeScrollTargetOptions aOptions)
1.2238 +{
1.2239 + return ComputeScrollTarget(aTargetFrame, aEvent->deltaX, aEvent->deltaY,
1.2240 + aEvent, aOptions);
1.2241 +}
1.2242 +
1.2243 +// Overload ComputeScrollTarget method to allow passing "test" dx and dy when looking
1.2244 +// for which scrollbarowners to activate when two finger down on trackpad
1.2245 +// and before any actual motion
1.2246 +nsIScrollableFrame*
1.2247 +EventStateManager::ComputeScrollTarget(nsIFrame* aTargetFrame,
1.2248 + double aDirectionX,
1.2249 + double aDirectionY,
1.2250 + WidgetWheelEvent* aEvent,
1.2251 + ComputeScrollTargetOptions aOptions)
1.2252 +{
1.2253 + if (aOptions & PREFER_MOUSE_WHEEL_TRANSACTION) {
1.2254 + // If the user recently scrolled with the mousewheel, then they probably
1.2255 + // want to scroll the same view as before instead of the view under the
1.2256 + // cursor. WheelTransaction tracks the frame currently being
1.2257 + // scrolled with the mousewheel. We consider the transaction ended when the
1.2258 + // mouse moves more than "mousewheel.transaction.ignoremovedelay"
1.2259 + // milliseconds after the last scroll operation, or any time the mouse moves
1.2260 + // out of the frame, or when more than "mousewheel.transaction.timeout"
1.2261 + // milliseconds have passed after the last operation, even if the mouse
1.2262 + // hasn't moved.
1.2263 + nsIFrame* lastScrollFrame = WheelTransaction::GetTargetFrame();
1.2264 + if (lastScrollFrame) {
1.2265 + nsIScrollableFrame* frameToScroll =
1.2266 + lastScrollFrame->GetScrollTargetFrame();
1.2267 + if (frameToScroll) {
1.2268 + return frameToScroll;
1.2269 + }
1.2270 + }
1.2271 + }
1.2272 +
1.2273 + // If the event doesn't cause scroll actually, we cannot find scroll target
1.2274 + // because we check if the event can cause scroll actually on each found
1.2275 + // scrollable frame.
1.2276 + if (!aDirectionX && !aDirectionY) {
1.2277 + return nullptr;
1.2278 + }
1.2279 +
1.2280 + bool checkIfScrollableX =
1.2281 + aDirectionX && (aOptions & PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_X_AXIS);
1.2282 + bool checkIfScrollableY =
1.2283 + aDirectionY && (aOptions & PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_Y_AXIS);
1.2284 +
1.2285 + nsIScrollableFrame* frameToScroll = nullptr;
1.2286 + nsIFrame* scrollFrame =
1.2287 + !(aOptions & START_FROM_PARENT) ? aTargetFrame :
1.2288 + GetParentFrameToScroll(aTargetFrame);
1.2289 + for (; scrollFrame; scrollFrame = GetParentFrameToScroll(scrollFrame)) {
1.2290 + // Check whether the frame wants to provide us with a scrollable view.
1.2291 + frameToScroll = scrollFrame->GetScrollTargetFrame();
1.2292 + if (!frameToScroll) {
1.2293 + continue;
1.2294 + }
1.2295 +
1.2296 + // Don't scroll vertically by mouse-wheel on a single-line text control.
1.2297 + if (checkIfScrollableY) {
1.2298 + nsIContent* c = scrollFrame->GetContent();
1.2299 + nsCOMPtr<nsITextControlElement> ctrl =
1.2300 + do_QueryInterface(c->IsInAnonymousSubtree() ? c->GetBindingParent() : c);
1.2301 + if (ctrl && ctrl->IsSingleLineTextControl()) {
1.2302 + continue;
1.2303 + }
1.2304 + }
1.2305 +
1.2306 + if (!checkIfScrollableX && !checkIfScrollableY) {
1.2307 + return frameToScroll;
1.2308 + }
1.2309 +
1.2310 + ScrollbarStyles ss = frameToScroll->GetScrollbarStyles();
1.2311 + bool hiddenForV = (NS_STYLE_OVERFLOW_HIDDEN == ss.mVertical);
1.2312 + bool hiddenForH = (NS_STYLE_OVERFLOW_HIDDEN == ss.mHorizontal);
1.2313 + if ((hiddenForV && hiddenForH) ||
1.2314 + (checkIfScrollableY && !checkIfScrollableX && hiddenForV) ||
1.2315 + (checkIfScrollableX && !checkIfScrollableY && hiddenForH)) {
1.2316 + continue;
1.2317 + }
1.2318 +
1.2319 + // For default action, we should climb up the tree if cannot scroll it
1.2320 + // by the event actually.
1.2321 + bool canScroll =
1.2322 + WheelHandlingUtils::CanScrollOn(frameToScroll, aDirectionX, aDirectionY);
1.2323 + // Comboboxes need special care.
1.2324 + nsIComboboxControlFrame* comboBox = do_QueryFrame(scrollFrame);
1.2325 + if (comboBox) {
1.2326 + if (comboBox->IsDroppedDown()) {
1.2327 + // Don't propagate to parent when drop down menu is active.
1.2328 + return canScroll ? frameToScroll : nullptr;
1.2329 + }
1.2330 + // Always propagate when not dropped down (even if focused).
1.2331 + continue;
1.2332 + }
1.2333 +
1.2334 + if (canScroll) {
1.2335 + return frameToScroll;
1.2336 + }
1.2337 + }
1.2338 +
1.2339 + nsIFrame* newFrame = nsLayoutUtils::GetCrossDocParentFrame(
1.2340 + aTargetFrame->PresContext()->FrameManager()->GetRootFrame());
1.2341 + aOptions =
1.2342 + static_cast<ComputeScrollTargetOptions>(aOptions & ~START_FROM_PARENT);
1.2343 + return newFrame ? ComputeScrollTarget(newFrame, aEvent, aOptions) : nullptr;
1.2344 +}
1.2345 +
1.2346 +nsSize
1.2347 +EventStateManager::GetScrollAmount(nsPresContext* aPresContext,
1.2348 + WidgetWheelEvent* aEvent,
1.2349 + nsIScrollableFrame* aScrollableFrame)
1.2350 +{
1.2351 + MOZ_ASSERT(aPresContext);
1.2352 + MOZ_ASSERT(aEvent);
1.2353 +
1.2354 + bool isPage = (aEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_PAGE);
1.2355 + if (aScrollableFrame) {
1.2356 + return isPage ? aScrollableFrame->GetPageScrollAmount() :
1.2357 + aScrollableFrame->GetLineScrollAmount();
1.2358 + }
1.2359 +
1.2360 + // If there is no scrollable frame and page scrolling, use view port size.
1.2361 + if (isPage) {
1.2362 + return aPresContext->GetVisibleArea().Size();
1.2363 + }
1.2364 +
1.2365 + // If there is no scrollable frame, we should use root frame's information.
1.2366 + nsIFrame* rootFrame = aPresContext->PresShell()->GetRootFrame();
1.2367 + if (!rootFrame) {
1.2368 + return nsSize(0, 0);
1.2369 + }
1.2370 + nsRefPtr<nsFontMetrics> fm;
1.2371 + nsLayoutUtils::GetFontMetricsForFrame(rootFrame, getter_AddRefs(fm),
1.2372 + nsLayoutUtils::FontSizeInflationFor(rootFrame));
1.2373 + NS_ENSURE_TRUE(fm, nsSize(0, 0));
1.2374 + return nsSize(fm->AveCharWidth(), fm->MaxHeight());
1.2375 +}
1.2376 +
1.2377 +void
1.2378 +EventStateManager::DoScrollText(nsIScrollableFrame* aScrollableFrame,
1.2379 + WidgetWheelEvent* aEvent)
1.2380 +{
1.2381 + MOZ_ASSERT(aScrollableFrame);
1.2382 + MOZ_ASSERT(aEvent);
1.2383 +
1.2384 + nsIFrame* scrollFrame = do_QueryFrame(aScrollableFrame);
1.2385 + MOZ_ASSERT(scrollFrame);
1.2386 + nsWeakFrame scrollFrameWeak(scrollFrame);
1.2387 +
1.2388 + nsIFrame* lastScrollFrame = WheelTransaction::GetTargetFrame();
1.2389 + if (!lastScrollFrame) {
1.2390 + WheelTransaction::BeginTransaction(scrollFrame, aEvent);
1.2391 + } else if (lastScrollFrame != scrollFrame) {
1.2392 + WheelTransaction::EndTransaction();
1.2393 + WheelTransaction::BeginTransaction(scrollFrame, aEvent);
1.2394 + } else {
1.2395 + WheelTransaction::UpdateTransaction(aEvent);
1.2396 + }
1.2397 +
1.2398 + // When the scroll event will not scroll any views, UpdateTransaction
1.2399 + // fired MozMouseScrollFailed event which is for automated testing.
1.2400 + // In the event handler, the target frame might be destroyed. Then,
1.2401 + // we should not try scrolling anything.
1.2402 + if (!scrollFrameWeak.IsAlive()) {
1.2403 + WheelTransaction::EndTransaction();
1.2404 + return;
1.2405 + }
1.2406 +
1.2407 + // Default action's actual scroll amount should be computed from device
1.2408 + // pixels.
1.2409 + nsPresContext* pc = scrollFrame->PresContext();
1.2410 + nsSize scrollAmount = GetScrollAmount(pc, aEvent, aScrollableFrame);
1.2411 + nsIntSize scrollAmountInDevPixels(
1.2412 + pc->AppUnitsToDevPixels(scrollAmount.width),
1.2413 + pc->AppUnitsToDevPixels(scrollAmount.height));
1.2414 + nsIntPoint actualDevPixelScrollAmount =
1.2415 + DeltaAccumulator::GetInstance()->
1.2416 + ComputeScrollAmountForDefaultAction(aEvent, scrollAmountInDevPixels);
1.2417 +
1.2418 + // Don't scroll around the axis whose overflow style is hidden.
1.2419 + ScrollbarStyles overflowStyle = aScrollableFrame->GetScrollbarStyles();
1.2420 + if (overflowStyle.mHorizontal == NS_STYLE_OVERFLOW_HIDDEN) {
1.2421 + actualDevPixelScrollAmount.x = 0;
1.2422 + }
1.2423 + if (overflowStyle.mVertical == NS_STYLE_OVERFLOW_HIDDEN) {
1.2424 + actualDevPixelScrollAmount.y = 0;
1.2425 + }
1.2426 +
1.2427 + nsIAtom* origin = nullptr;
1.2428 + switch (aEvent->deltaMode) {
1.2429 + case nsIDOMWheelEvent::DOM_DELTA_LINE:
1.2430 + origin = nsGkAtoms::mouseWheel;
1.2431 + break;
1.2432 + case nsIDOMWheelEvent::DOM_DELTA_PAGE:
1.2433 + origin = nsGkAtoms::pages;
1.2434 + break;
1.2435 + case nsIDOMWheelEvent::DOM_DELTA_PIXEL:
1.2436 + origin = nsGkAtoms::pixels;
1.2437 + break;
1.2438 + default:
1.2439 + MOZ_CRASH("Invalid deltaMode value comes");
1.2440 + }
1.2441 +
1.2442 + // We shouldn't scroll more one page at once except when over one page scroll
1.2443 + // is allowed for the event.
1.2444 + nsSize pageSize = aScrollableFrame->GetPageScrollAmount();
1.2445 + nsIntSize devPixelPageSize(pc->AppUnitsToDevPixels(pageSize.width),
1.2446 + pc->AppUnitsToDevPixels(pageSize.height));
1.2447 + if (!WheelPrefs::GetInstance()->IsOverOnePageScrollAllowedX(aEvent) &&
1.2448 + DeprecatedAbs(actualDevPixelScrollAmount.x) > devPixelPageSize.width) {
1.2449 + actualDevPixelScrollAmount.x =
1.2450 + (actualDevPixelScrollAmount.x >= 0) ? devPixelPageSize.width :
1.2451 + -devPixelPageSize.width;
1.2452 + }
1.2453 +
1.2454 + if (!WheelPrefs::GetInstance()->IsOverOnePageScrollAllowedY(aEvent) &&
1.2455 + DeprecatedAbs(actualDevPixelScrollAmount.y) > devPixelPageSize.height) {
1.2456 + actualDevPixelScrollAmount.y =
1.2457 + (actualDevPixelScrollAmount.y >= 0) ? devPixelPageSize.height :
1.2458 + -devPixelPageSize.height;
1.2459 + }
1.2460 +
1.2461 + bool isDeltaModePixel =
1.2462 + (aEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL);
1.2463 +
1.2464 + nsIScrollableFrame::ScrollMode mode;
1.2465 + switch (aEvent->scrollType) {
1.2466 + case WidgetWheelEvent::SCROLL_DEFAULT:
1.2467 + if (isDeltaModePixel) {
1.2468 + mode = nsIScrollableFrame::NORMAL;
1.2469 + } else {
1.2470 + mode = nsIScrollableFrame::SMOOTH;
1.2471 + }
1.2472 + break;
1.2473 + case WidgetWheelEvent::SCROLL_SYNCHRONOUSLY:
1.2474 + mode = nsIScrollableFrame::INSTANT;
1.2475 + break;
1.2476 + case WidgetWheelEvent::SCROLL_ASYNCHRONOUSELY:
1.2477 + mode = nsIScrollableFrame::NORMAL;
1.2478 + break;
1.2479 + case WidgetWheelEvent::SCROLL_SMOOTHLY:
1.2480 + mode = nsIScrollableFrame::SMOOTH;
1.2481 + break;
1.2482 + default:
1.2483 + MOZ_CRASH("Invalid scrollType value comes");
1.2484 + }
1.2485 +
1.2486 + nsIntPoint overflow;
1.2487 + aScrollableFrame->ScrollBy(actualDevPixelScrollAmount,
1.2488 + nsIScrollableFrame::DEVICE_PIXELS,
1.2489 + mode, &overflow, origin);
1.2490 +
1.2491 + if (!scrollFrameWeak.IsAlive()) {
1.2492 + // If the scroll causes changing the layout, we can think that the event
1.2493 + // has been completely consumed by the content. Then, users probably don't
1.2494 + // want additional action.
1.2495 + aEvent->overflowDeltaX = aEvent->overflowDeltaY = 0;
1.2496 + } else if (isDeltaModePixel) {
1.2497 + aEvent->overflowDeltaX = overflow.x;
1.2498 + aEvent->overflowDeltaY = overflow.y;
1.2499 + } else {
1.2500 + aEvent->overflowDeltaX =
1.2501 + static_cast<double>(overflow.x) / scrollAmountInDevPixels.width;
1.2502 + aEvent->overflowDeltaY =
1.2503 + static_cast<double>(overflow.y) / scrollAmountInDevPixels.height;
1.2504 + }
1.2505 +
1.2506 + // If CSS overflow properties caused not to scroll, the overflowDelta* values
1.2507 + // should be same as delta* values since they may be used as gesture event by
1.2508 + // widget. However, if there is another scrollable element in the ancestor
1.2509 + // along the axis, probably users don't want the operation to cause
1.2510 + // additional action such as moving history. In such case, overflowDelta
1.2511 + // values should stay zero.
1.2512 + if (scrollFrameWeak.IsAlive()) {
1.2513 + if (aEvent->deltaX &&
1.2514 + overflowStyle.mHorizontal == NS_STYLE_OVERFLOW_HIDDEN &&
1.2515 + !ComputeScrollTarget(scrollFrame, aEvent,
1.2516 + COMPUTE_SCROLLABLE_ANCESTOR_ALONG_X_AXIS)) {
1.2517 + aEvent->overflowDeltaX = aEvent->deltaX;
1.2518 + }
1.2519 + if (aEvent->deltaY &&
1.2520 + overflowStyle.mVertical == NS_STYLE_OVERFLOW_HIDDEN &&
1.2521 + !ComputeScrollTarget(scrollFrame, aEvent,
1.2522 + COMPUTE_SCROLLABLE_ANCESTOR_ALONG_Y_AXIS)) {
1.2523 + aEvent->overflowDeltaY = aEvent->deltaY;
1.2524 + }
1.2525 + }
1.2526 +
1.2527 + NS_ASSERTION(aEvent->overflowDeltaX == 0 ||
1.2528 + (aEvent->overflowDeltaX > 0) == (aEvent->deltaX > 0),
1.2529 + "The sign of overflowDeltaX is different from the scroll direction");
1.2530 + NS_ASSERTION(aEvent->overflowDeltaY == 0 ||
1.2531 + (aEvent->overflowDeltaY > 0) == (aEvent->deltaY > 0),
1.2532 + "The sign of overflowDeltaY is different from the scroll direction");
1.2533 +
1.2534 + WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(aEvent);
1.2535 +}
1.2536 +
1.2537 +void
1.2538 +EventStateManager::DecideGestureEvent(WidgetGestureNotifyEvent* aEvent,
1.2539 + nsIFrame* targetFrame)
1.2540 +{
1.2541 +
1.2542 + NS_ASSERTION(aEvent->message == NS_GESTURENOTIFY_EVENT_START,
1.2543 + "DecideGestureEvent called with a non-gesture event");
1.2544 +
1.2545 + /* Check the ancestor tree to decide if any frame is willing* to receive
1.2546 + * a MozPixelScroll event. If that's the case, the current touch gesture
1.2547 + * will be used as a pan gesture; otherwise it will be a regular
1.2548 + * mousedown/mousemove/click event.
1.2549 + *
1.2550 + * *willing: determine if it makes sense to pan the element using scroll events:
1.2551 + * - For web content: if there are any visible scrollbars on the touch point
1.2552 + * - For XUL: if it's an scrollable element that can currently scroll in some
1.2553 + * direction.
1.2554 + *
1.2555 + * Note: we'll have to one-off various cases to ensure a good usable behavior
1.2556 + */
1.2557 + WidgetGestureNotifyEvent::ePanDirection panDirection =
1.2558 + WidgetGestureNotifyEvent::ePanNone;
1.2559 + bool displayPanFeedback = false;
1.2560 + for (nsIFrame* current = targetFrame; current;
1.2561 + current = nsLayoutUtils::GetCrossDocParentFrame(current)) {
1.2562 +
1.2563 + nsIAtom* currentFrameType = current->GetType();
1.2564 +
1.2565 + // Scrollbars should always be draggable
1.2566 + if (currentFrameType == nsGkAtoms::scrollbarFrame) {
1.2567 + panDirection = WidgetGestureNotifyEvent::ePanNone;
1.2568 + break;
1.2569 + }
1.2570 +
1.2571 +#ifdef MOZ_XUL
1.2572 + // Special check for trees
1.2573 + nsTreeBodyFrame* treeFrame = do_QueryFrame(current);
1.2574 + if (treeFrame) {
1.2575 + if (treeFrame->GetHorizontalOverflow()) {
1.2576 + panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
1.2577 + }
1.2578 + if (treeFrame->GetVerticalOverflow()) {
1.2579 + panDirection = WidgetGestureNotifyEvent::ePanVertical;
1.2580 + }
1.2581 + break;
1.2582 + }
1.2583 +#endif
1.2584 +
1.2585 + nsIScrollableFrame* scrollableFrame = do_QueryFrame(current);
1.2586 + if (scrollableFrame) {
1.2587 + if (current->IsFrameOfType(nsIFrame::eXULBox)) {
1.2588 + displayPanFeedback = true;
1.2589 +
1.2590 + nsRect scrollRange = scrollableFrame->GetScrollRange();
1.2591 + bool canScrollHorizontally = scrollRange.width > 0;
1.2592 +
1.2593 + if (targetFrame->GetType() == nsGkAtoms::menuFrame) {
1.2594 + // menu frames report horizontal scroll when they have submenus
1.2595 + // and we don't want that
1.2596 + canScrollHorizontally = false;
1.2597 + displayPanFeedback = false;
1.2598 + }
1.2599 +
1.2600 + // Vertical panning has priority over horizontal panning, so
1.2601 + // when vertical movement is possible we can just finish the loop.
1.2602 + if (scrollRange.height > 0) {
1.2603 + panDirection = WidgetGestureNotifyEvent::ePanVertical;
1.2604 + break;
1.2605 + }
1.2606 +
1.2607 + if (canScrollHorizontally) {
1.2608 + panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
1.2609 + displayPanFeedback = false;
1.2610 + }
1.2611 + } else { //Not a XUL box
1.2612 + uint32_t scrollbarVisibility = scrollableFrame->GetScrollbarVisibility();
1.2613 +
1.2614 + //Check if we have visible scrollbars
1.2615 + if (scrollbarVisibility & nsIScrollableFrame::VERTICAL) {
1.2616 + panDirection = WidgetGestureNotifyEvent::ePanVertical;
1.2617 + displayPanFeedback = true;
1.2618 + break;
1.2619 + }
1.2620 +
1.2621 + if (scrollbarVisibility & nsIScrollableFrame::HORIZONTAL) {
1.2622 + panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
1.2623 + displayPanFeedback = true;
1.2624 + }
1.2625 + }
1.2626 + } //scrollableFrame
1.2627 + } //ancestor chain
1.2628 +
1.2629 + aEvent->displayPanFeedback = displayPanFeedback;
1.2630 + aEvent->panDirection = panDirection;
1.2631 +}
1.2632 +
1.2633 +#ifdef XP_MACOSX
1.2634 +static bool
1.2635 +NodeAllowsClickThrough(nsINode* aNode)
1.2636 +{
1.2637 + while (aNode) {
1.2638 + if (aNode->IsElement() && aNode->AsElement()->IsXUL()) {
1.2639 + mozilla::dom::Element* element = aNode->AsElement();
1.2640 + static nsIContent::AttrValuesArray strings[] =
1.2641 + {&nsGkAtoms::always, &nsGkAtoms::never, nullptr};
1.2642 + switch (element->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::clickthrough,
1.2643 + strings, eCaseMatters)) {
1.2644 + case 0:
1.2645 + return true;
1.2646 + case 1:
1.2647 + return false;
1.2648 + }
1.2649 + }
1.2650 + aNode = nsContentUtils::GetCrossDocParentNode(aNode);
1.2651 + }
1.2652 + return true;
1.2653 +}
1.2654 +#endif
1.2655 +
1.2656 +nsresult
1.2657 +EventStateManager::PostHandleEvent(nsPresContext* aPresContext,
1.2658 + WidgetEvent* aEvent,
1.2659 + nsIFrame* aTargetFrame,
1.2660 + nsEventStatus* aStatus)
1.2661 +{
1.2662 + NS_ENSURE_ARG(aPresContext);
1.2663 + NS_ENSURE_ARG_POINTER(aStatus);
1.2664 +
1.2665 + bool dispatchedToContentProcess = HandleCrossProcessEvent(aEvent,
1.2666 + aTargetFrame,
1.2667 + aStatus);
1.2668 +
1.2669 + mCurrentTarget = aTargetFrame;
1.2670 + mCurrentTargetContent = nullptr;
1.2671 +
1.2672 + // Most of the events we handle below require a frame.
1.2673 + // Add special cases here.
1.2674 + if (!mCurrentTarget && aEvent->message != NS_MOUSE_BUTTON_UP &&
1.2675 + aEvent->message != NS_MOUSE_BUTTON_DOWN) {
1.2676 + return NS_OK;
1.2677 + }
1.2678 +
1.2679 + //Keep the prescontext alive, we might need it after event dispatch
1.2680 + nsRefPtr<nsPresContext> presContext = aPresContext;
1.2681 + nsresult ret = NS_OK;
1.2682 +
1.2683 + switch (aEvent->message) {
1.2684 + case NS_MOUSE_BUTTON_DOWN:
1.2685 + {
1.2686 + WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
1.2687 + if (mouseEvent->button == WidgetMouseEvent::eLeftButton &&
1.2688 + !sNormalLMouseEventInProcess) {
1.2689 + // We got a mouseup event while a mousedown event was being processed.
1.2690 + // Make sure that the capturing content is cleared.
1.2691 + nsIPresShell::SetCapturingContent(nullptr, 0);
1.2692 + break;
1.2693 + }
1.2694 +
1.2695 + nsCOMPtr<nsIContent> activeContent;
1.2696 + if (nsEventStatus_eConsumeNoDefault != *aStatus) {
1.2697 + nsCOMPtr<nsIContent> newFocus;
1.2698 + bool suppressBlur = false;
1.2699 + if (mCurrentTarget) {
1.2700 + mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(newFocus));
1.2701 + const nsStyleUserInterface* ui = mCurrentTarget->StyleUserInterface();
1.2702 + activeContent = mCurrentTarget->GetContent();
1.2703 +
1.2704 + // In some cases, we do not want to even blur the current focused
1.2705 + // element. Those cases are:
1.2706 + // 1. -moz-user-focus CSS property is set to 'ignore';
1.2707 + // 2. Element with NS_EVENT_STATE_DISABLED
1.2708 + // (aka :disabled pseudo-class for HTML element);
1.2709 + // 3. XUL control element has the disabled property set to 'true'.
1.2710 + //
1.2711 + // We can't use nsIFrame::IsFocusable() because we want to blur when
1.2712 + // we click on a visibility: none element.
1.2713 + // We can't use nsIContent::IsFocusable() because we want to blur when
1.2714 + // we click on a non-focusable element like a <div>.
1.2715 + // We have to use |aEvent->target| to not make sure we do not check an
1.2716 + // anonymous node of the targeted element.
1.2717 + suppressBlur = (ui->mUserFocus == NS_STYLE_USER_FOCUS_IGNORE);
1.2718 +
1.2719 + if (!suppressBlur) {
1.2720 + nsCOMPtr<Element> element = do_QueryInterface(aEvent->target);
1.2721 + suppressBlur = element &&
1.2722 + element->State().HasState(NS_EVENT_STATE_DISABLED);
1.2723 + }
1.2724 +
1.2725 + if (!suppressBlur) {
1.2726 + nsCOMPtr<nsIDOMXULControlElement> xulControl =
1.2727 + do_QueryInterface(aEvent->target);
1.2728 + if (xulControl) {
1.2729 + bool disabled;
1.2730 + xulControl->GetDisabled(&disabled);
1.2731 + suppressBlur = disabled;
1.2732 + }
1.2733 + }
1.2734 + }
1.2735 +
1.2736 + if (!suppressBlur) {
1.2737 + suppressBlur = nsContentUtils::IsUserFocusIgnored(activeContent);
1.2738 + }
1.2739 +
1.2740 + nsIFrame* currFrame = mCurrentTarget;
1.2741 +
1.2742 + // When a root content which isn't editable but has an editable HTML
1.2743 + // <body> element is clicked, we should redirect the focus to the
1.2744 + // the <body> element. E.g., when an user click bottom of the editor
1.2745 + // where is outside of the <body> element, the <body> should be focused
1.2746 + // and the user can edit immediately after that.
1.2747 + //
1.2748 + // NOTE: The newFocus isn't editable that also means it's not in
1.2749 + // designMode. In designMode, all contents are not focusable.
1.2750 + if (newFocus && !newFocus->IsEditable()) {
1.2751 + nsIDocument *doc = newFocus->GetCurrentDoc();
1.2752 + if (doc && newFocus == doc->GetRootElement()) {
1.2753 + nsIContent *bodyContent =
1.2754 + nsLayoutUtils::GetEditableRootContentByContentEditable(doc);
1.2755 + if (bodyContent) {
1.2756 + nsIFrame* bodyFrame = bodyContent->GetPrimaryFrame();
1.2757 + if (bodyFrame) {
1.2758 + currFrame = bodyFrame;
1.2759 + newFocus = bodyContent;
1.2760 + }
1.2761 + }
1.2762 + }
1.2763 + }
1.2764 +
1.2765 + // When the mouse is pressed, the default action is to focus the
1.2766 + // target. Look for the nearest enclosing focusable frame.
1.2767 + while (currFrame) {
1.2768 + // If the mousedown happened inside a popup, don't
1.2769 + // try to set focus on one of its containing elements
1.2770 + const nsStyleDisplay* display = currFrame->StyleDisplay();
1.2771 + if (display->mDisplay == NS_STYLE_DISPLAY_POPUP) {
1.2772 + newFocus = nullptr;
1.2773 + break;
1.2774 + }
1.2775 +
1.2776 + int32_t tabIndexUnused;
1.2777 + if (currFrame->IsFocusable(&tabIndexUnused, true)) {
1.2778 + newFocus = currFrame->GetContent();
1.2779 + nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(newFocus));
1.2780 + if (domElement)
1.2781 + break;
1.2782 + }
1.2783 + currFrame = currFrame->GetParent();
1.2784 + }
1.2785 +
1.2786 + nsIFocusManager* fm = nsFocusManager::GetFocusManager();
1.2787 + if (fm) {
1.2788 + // if something was found to focus, focus it. Otherwise, if the
1.2789 + // element that was clicked doesn't have -moz-user-focus: ignore,
1.2790 + // clear the existing focus. For -moz-user-focus: ignore, the focus
1.2791 + // is just left as is.
1.2792 + // Another effect of mouse clicking, handled in nsSelection, is that
1.2793 + // it should update the caret position to where the mouse was
1.2794 + // clicked. Because the focus is cleared when clicking on a
1.2795 + // non-focusable node, the next press of the tab key will cause
1.2796 + // focus to be shifted from the caret position instead of the root.
1.2797 + if (newFocus && currFrame) {
1.2798 + // use the mouse flag and the noscroll flag so that the content
1.2799 + // doesn't unexpectedly scroll when clicking an element that is
1.2800 + // only hald visible
1.2801 + nsCOMPtr<nsIDOMElement> newFocusElement = do_QueryInterface(newFocus);
1.2802 + fm->SetFocus(newFocusElement, nsIFocusManager::FLAG_BYMOUSE |
1.2803 + nsIFocusManager::FLAG_NOSCROLL);
1.2804 + }
1.2805 + else if (!suppressBlur) {
1.2806 + // clear the focus within the frame and then set it as the
1.2807 + // focused frame
1.2808 + EnsureDocument(mPresContext);
1.2809 + if (mDocument) {
1.2810 +#ifdef XP_MACOSX
1.2811 + if (!activeContent || !activeContent->IsXUL())
1.2812 +#endif
1.2813 + fm->ClearFocus(mDocument->GetWindow());
1.2814 + fm->SetFocusedWindow(mDocument->GetWindow());
1.2815 + }
1.2816 + }
1.2817 + }
1.2818 +
1.2819 + // The rest is left button-specific.
1.2820 + if (mouseEvent->button != WidgetMouseEvent::eLeftButton) {
1.2821 + break;
1.2822 + }
1.2823 +
1.2824 + if (activeContent) {
1.2825 + // The nearest enclosing element goes into the
1.2826 + // :active state. If we fail the QI to DOMElement,
1.2827 + // then we know we're only a node, and that we need
1.2828 + // to obtain our parent element and put it into :active
1.2829 + // instead.
1.2830 + nsCOMPtr<nsIDOMElement> elt(do_QueryInterface(activeContent));
1.2831 + if (!elt) {
1.2832 + nsIContent* par = activeContent->GetParent();
1.2833 + if (par)
1.2834 + activeContent = par;
1.2835 + }
1.2836 + }
1.2837 + }
1.2838 + else {
1.2839 + // if we're here, the event handler returned false, so stop
1.2840 + // any of our own processing of a drag. Workaround for bug 43258.
1.2841 + StopTrackingDragGesture();
1.2842 +
1.2843 + // When the event was cancelled, there is currently a chrome document
1.2844 + // focused and a mousedown just occurred on a content document, ensure
1.2845 + // that the window that was clicked is focused.
1.2846 + EnsureDocument(mPresContext);
1.2847 + nsIFocusManager* fm = nsFocusManager::GetFocusManager();
1.2848 + if (mDocument && fm) {
1.2849 + nsCOMPtr<nsIDOMWindow> currentWindow;
1.2850 + fm->GetFocusedWindow(getter_AddRefs(currentWindow));
1.2851 + if (currentWindow && mDocument->GetWindow() &&
1.2852 + currentWindow != mDocument->GetWindow() &&
1.2853 + !nsContentUtils::IsChromeDoc(mDocument)) {
1.2854 + nsCOMPtr<nsIDOMWindow> currentTop;
1.2855 + nsCOMPtr<nsIDOMWindow> newTop;
1.2856 + currentWindow->GetTop(getter_AddRefs(currentTop));
1.2857 + mDocument->GetWindow()->GetTop(getter_AddRefs(newTop));
1.2858 + nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(currentWindow);
1.2859 + nsCOMPtr<nsIDocument> currentDoc = win->GetExtantDoc();
1.2860 + if (nsContentUtils::IsChromeDoc(currentDoc) ||
1.2861 + (currentTop && newTop && currentTop != newTop)) {
1.2862 + fm->SetFocusedWindow(mDocument->GetWindow());
1.2863 + }
1.2864 + }
1.2865 + }
1.2866 + }
1.2867 + SetActiveManager(this, activeContent);
1.2868 + }
1.2869 + break;
1.2870 + case NS_POINTER_CANCEL:
1.2871 + case NS_POINTER_UP: {
1.2872 + WidgetPointerEvent* pointerEvent = aEvent->AsPointerEvent();
1.2873 + // After UP/Cancel Touch pointers become invalid so we can remove relevant helper from Table
1.2874 + // Mouse/Pen pointers are valid all the time (not only between down/up)
1.2875 + if (pointerEvent->inputSource == nsIDOMMouseEvent::MOZ_SOURCE_TOUCH) {
1.2876 + mPointersEnterLeaveHelper.Remove(pointerEvent->pointerId);
1.2877 + }
1.2878 + if (pointerEvent->inputSource != nsIDOMMouseEvent::MOZ_SOURCE_MOUSE) {
1.2879 + GenerateMouseEnterExit(pointerEvent);
1.2880 + }
1.2881 + break;
1.2882 + }
1.2883 + case NS_MOUSE_BUTTON_UP:
1.2884 + {
1.2885 + ClearGlobalActiveContent(this);
1.2886 + WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
1.2887 + if (mouseEvent && mouseEvent->IsReal()) {
1.2888 + if (!mCurrentTarget) {
1.2889 + GetEventTarget();
1.2890 + }
1.2891 + // Make sure to dispatch the click even if there is no frame for
1.2892 + // the current target element. This is required for Web compatibility.
1.2893 + ret = CheckForAndDispatchClick(presContext, mouseEvent, aStatus);
1.2894 + }
1.2895 +
1.2896 + nsIPresShell *shell = presContext->GetPresShell();
1.2897 + if (shell) {
1.2898 + nsRefPtr<nsFrameSelection> frameSelection = shell->FrameSelection();
1.2899 + frameSelection->SetMouseDownState(false);
1.2900 + }
1.2901 + }
1.2902 + break;
1.2903 + case NS_WHEEL_STOP:
1.2904 + {
1.2905 + MOZ_ASSERT(aEvent->mFlags.mIsTrusted);
1.2906 + ScrollbarsForWheel::MayInactivate();
1.2907 + }
1.2908 + break;
1.2909 + case NS_WHEEL_WHEEL:
1.2910 + case NS_WHEEL_START:
1.2911 + {
1.2912 + MOZ_ASSERT(aEvent->mFlags.mIsTrusted);
1.2913 +
1.2914 + if (*aStatus == nsEventStatus_eConsumeNoDefault) {
1.2915 + ScrollbarsForWheel::Inactivate();
1.2916 + break;
1.2917 + }
1.2918 +
1.2919 + WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
1.2920 + switch (WheelPrefs::GetInstance()->ComputeActionFor(wheelEvent)) {
1.2921 + case WheelPrefs::ACTION_SCROLL: {
1.2922 + // For scrolling of default action, we should honor the mouse wheel
1.2923 + // transaction.
1.2924 +
1.2925 + ScrollbarsForWheel::PrepareToScrollText(this, aTargetFrame, wheelEvent);
1.2926 +
1.2927 + if (aEvent->message != NS_WHEEL_WHEEL ||
1.2928 + (!wheelEvent->deltaX && !wheelEvent->deltaY)) {
1.2929 + break;
1.2930 + }
1.2931 +
1.2932 + nsIScrollableFrame* scrollTarget =
1.2933 + ComputeScrollTarget(aTargetFrame, wheelEvent,
1.2934 + COMPUTE_DEFAULT_ACTION_TARGET);
1.2935 +
1.2936 + ScrollbarsForWheel::SetActiveScrollTarget(scrollTarget);
1.2937 +
1.2938 + nsIFrame* rootScrollFrame = !aTargetFrame ? nullptr :
1.2939 + aTargetFrame->PresContext()->PresShell()->GetRootScrollFrame();
1.2940 + nsIScrollableFrame* rootScrollableFrame = nullptr;
1.2941 + if (rootScrollFrame) {
1.2942 + rootScrollableFrame = do_QueryFrame(rootScrollFrame);
1.2943 + }
1.2944 + if (!scrollTarget || scrollTarget == rootScrollableFrame) {
1.2945 + wheelEvent->mViewPortIsOverscrolled = true;
1.2946 + }
1.2947 + wheelEvent->overflowDeltaX = wheelEvent->deltaX;
1.2948 + wheelEvent->overflowDeltaY = wheelEvent->deltaY;
1.2949 + WheelPrefs::GetInstance()->
1.2950 + CancelApplyingUserPrefsFromOverflowDelta(wheelEvent);
1.2951 + if (scrollTarget) {
1.2952 + DoScrollText(scrollTarget, wheelEvent);
1.2953 + } else {
1.2954 + WheelTransaction::EndTransaction();
1.2955 + ScrollbarsForWheel::Inactivate();
1.2956 + }
1.2957 + break;
1.2958 + }
1.2959 + case WheelPrefs::ACTION_HISTORY: {
1.2960 + // If this event doesn't cause NS_MOUSE_SCROLL event or the direction
1.2961 + // is oblique, don't perform history back/forward.
1.2962 + int32_t intDelta = wheelEvent->GetPreferredIntDelta();
1.2963 + if (!intDelta) {
1.2964 + break;
1.2965 + }
1.2966 + DoScrollHistory(intDelta);
1.2967 + break;
1.2968 + }
1.2969 + case WheelPrefs::ACTION_ZOOM: {
1.2970 + // If this event doesn't cause NS_MOUSE_SCROLL event or the direction
1.2971 + // is oblique, don't perform zoom in/out.
1.2972 + int32_t intDelta = wheelEvent->GetPreferredIntDelta();
1.2973 + if (!intDelta) {
1.2974 + break;
1.2975 + }
1.2976 + DoScrollZoom(aTargetFrame, intDelta);
1.2977 + break;
1.2978 + }
1.2979 + case WheelPrefs::ACTION_NONE:
1.2980 + default:
1.2981 + // If we don't handle the wheel event, all of the delta values must
1.2982 + // be overflown delta values.
1.2983 + wheelEvent->overflowDeltaX = wheelEvent->deltaX;
1.2984 + wheelEvent->overflowDeltaY = wheelEvent->deltaY;
1.2985 + WheelPrefs::GetInstance()->
1.2986 + CancelApplyingUserPrefsFromOverflowDelta(wheelEvent);
1.2987 + break;
1.2988 + }
1.2989 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.2990 + }
1.2991 + break;
1.2992 +
1.2993 + case NS_GESTURENOTIFY_EVENT_START:
1.2994 + {
1.2995 + if (nsEventStatus_eConsumeNoDefault != *aStatus) {
1.2996 + DecideGestureEvent(aEvent->AsGestureNotifyEvent(), mCurrentTarget);
1.2997 + }
1.2998 + }
1.2999 + break;
1.3000 +
1.3001 + case NS_DRAGDROP_ENTER:
1.3002 + case NS_DRAGDROP_OVER:
1.3003 + {
1.3004 + NS_ASSERTION(aEvent->eventStructType == NS_DRAG_EVENT, "Expected a drag event");
1.3005 +
1.3006 + nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
1.3007 + if (!dragSession)
1.3008 + break;
1.3009 +
1.3010 + // Reset the flag.
1.3011 + dragSession->SetOnlyChromeDrop(false);
1.3012 + if (mPresContext) {
1.3013 + EnsureDocument(mPresContext);
1.3014 + }
1.3015 + bool isChromeDoc = nsContentUtils::IsChromeDoc(mDocument);
1.3016 +
1.3017 + // the initial dataTransfer is the one from the dragstart event that
1.3018 + // was set on the dragSession when the drag began.
1.3019 + nsCOMPtr<nsIDOMDataTransfer> dataTransfer;
1.3020 + nsCOMPtr<nsIDOMDataTransfer> initialDataTransfer;
1.3021 + dragSession->GetDataTransfer(getter_AddRefs(initialDataTransfer));
1.3022 +
1.3023 + WidgetDragEvent *dragEvent = aEvent->AsDragEvent();
1.3024 +
1.3025 + // collect any changes to moz cursor settings stored in the event's
1.3026 + // data transfer.
1.3027 + UpdateDragDataTransfer(dragEvent);
1.3028 +
1.3029 + // cancelling a dragenter or dragover event means that a drop should be
1.3030 + // allowed, so update the dropEffect and the canDrop state to indicate
1.3031 + // that a drag is allowed. If the event isn't cancelled, a drop won't be
1.3032 + // allowed. Essentially, to allow a drop somewhere, specify the effects
1.3033 + // using the effectAllowed and dropEffect properties in a dragenter or
1.3034 + // dragover event and cancel the event. To not allow a drop somewhere,
1.3035 + // don't cancel the event or set the effectAllowed or dropEffect to
1.3036 + // "none". This way, if the event is just ignored, no drop will be
1.3037 + // allowed.
1.3038 + uint32_t dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
1.3039 + if (nsEventStatus_eConsumeNoDefault == *aStatus) {
1.3040 + // if the event has a dataTransfer set, use it.
1.3041 + if (dragEvent->dataTransfer) {
1.3042 + // get the dataTransfer and the dropEffect that was set on it
1.3043 + dataTransfer = do_QueryInterface(dragEvent->dataTransfer);
1.3044 + dataTransfer->GetDropEffectInt(&dropEffect);
1.3045 + }
1.3046 + else {
1.3047 + // if dragEvent->dataTransfer is null, it means that no attempt was
1.3048 + // made to access the dataTransfer during the event, yet the event
1.3049 + // was cancelled. Instead, use the initial data transfer available
1.3050 + // from the drag session. The drop effect would not have been
1.3051 + // initialized (which is done in DragEvent::GetDataTransfer),
1.3052 + // so set it from the drag action. We'll still want to filter it
1.3053 + // based on the effectAllowed below.
1.3054 + dataTransfer = initialDataTransfer;
1.3055 +
1.3056 + uint32_t action;
1.3057 + dragSession->GetDragAction(&action);
1.3058 +
1.3059 + // filter the drop effect based on the action. Use UNINITIALIZED as
1.3060 + // any effect is allowed.
1.3061 + dropEffect = nsContentUtils::FilterDropEffect(action,
1.3062 + nsIDragService::DRAGDROP_ACTION_UNINITIALIZED);
1.3063 + }
1.3064 +
1.3065 + // At this point, if the dataTransfer is null, it means that the
1.3066 + // drag was originally started by directly calling the drag service.
1.3067 + // Just assume that all effects are allowed.
1.3068 + uint32_t effectAllowed = nsIDragService::DRAGDROP_ACTION_UNINITIALIZED;
1.3069 + if (dataTransfer)
1.3070 + dataTransfer->GetEffectAllowedInt(&effectAllowed);
1.3071 +
1.3072 + // set the drag action based on the drop effect and effect allowed.
1.3073 + // The drop effect field on the drag transfer object specifies the
1.3074 + // desired current drop effect. However, it cannot be used if the
1.3075 + // effectAllowed state doesn't include that type of action. If the
1.3076 + // dropEffect is "none", then the action will be 'none' so a drop will
1.3077 + // not be allowed.
1.3078 + uint32_t action = nsIDragService::DRAGDROP_ACTION_NONE;
1.3079 + if (effectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED ||
1.3080 + dropEffect & effectAllowed)
1.3081 + action = dropEffect;
1.3082 +
1.3083 + if (action == nsIDragService::DRAGDROP_ACTION_NONE)
1.3084 + dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
1.3085 +
1.3086 + // inform the drag session that a drop is allowed on this node.
1.3087 + dragSession->SetDragAction(action);
1.3088 + dragSession->SetCanDrop(action != nsIDragService::DRAGDROP_ACTION_NONE);
1.3089 +
1.3090 + // For now, do this only for dragover.
1.3091 + //XXXsmaug dragenter needs some more work.
1.3092 + if (aEvent->message == NS_DRAGDROP_OVER && !isChromeDoc) {
1.3093 + // Someone has called preventDefault(), check whether is was on
1.3094 + // content or chrome.
1.3095 + dragSession->SetOnlyChromeDrop(
1.3096 + !dragEvent->mDefaultPreventedOnContent);
1.3097 + }
1.3098 + } else if (aEvent->message == NS_DRAGDROP_OVER && !isChromeDoc) {
1.3099 + // No one called preventDefault(), so handle drop only in chrome.
1.3100 + dragSession->SetOnlyChromeDrop(true);
1.3101 + }
1.3102 +
1.3103 + // now set the drop effect in the initial dataTransfer. This ensures
1.3104 + // that we can get the desired drop effect in the drop event.
1.3105 + if (initialDataTransfer)
1.3106 + initialDataTransfer->SetDropEffectInt(dropEffect);
1.3107 + }
1.3108 + break;
1.3109 +
1.3110 + case NS_DRAGDROP_DROP:
1.3111 + {
1.3112 + // now fire the dragdrop event, for compatibility with XUL
1.3113 + if (mCurrentTarget && nsEventStatus_eConsumeNoDefault != *aStatus) {
1.3114 + nsCOMPtr<nsIContent> targetContent;
1.3115 + mCurrentTarget->GetContentForEvent(aEvent,
1.3116 + getter_AddRefs(targetContent));
1.3117 +
1.3118 + nsCOMPtr<nsIWidget> widget = mCurrentTarget->GetNearestWidget();
1.3119 + WidgetDragEvent event(aEvent->mFlags.mIsTrusted,
1.3120 + NS_DRAGDROP_DRAGDROP, widget);
1.3121 +
1.3122 + WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
1.3123 + event.refPoint = mouseEvent->refPoint;
1.3124 + if (mouseEvent->widget) {
1.3125 + event.refPoint += LayoutDeviceIntPoint::FromUntyped(mouseEvent->widget->WidgetToScreenOffset());
1.3126 + }
1.3127 + event.refPoint -= LayoutDeviceIntPoint::FromUntyped(widget->WidgetToScreenOffset());
1.3128 + event.modifiers = mouseEvent->modifiers;
1.3129 + event.buttons = mouseEvent->buttons;
1.3130 + event.inputSource = mouseEvent->inputSource;
1.3131 +
1.3132 + nsEventStatus status = nsEventStatus_eIgnore;
1.3133 + nsCOMPtr<nsIPresShell> presShell = mPresContext->GetPresShell();
1.3134 + if (presShell) {
1.3135 + presShell->HandleEventWithTarget(&event, mCurrentTarget,
1.3136 + targetContent, &status);
1.3137 + }
1.3138 + }
1.3139 + sLastDragOverFrame = nullptr;
1.3140 + ClearGlobalActiveContent(this);
1.3141 + break;
1.3142 + }
1.3143 + case NS_DRAGDROP_EXIT:
1.3144 + // make sure to fire the enter and exit_synth events after the
1.3145 + // NS_DRAGDROP_EXIT event, otherwise we'll clean up too early
1.3146 + GenerateDragDropEnterExit(presContext, aEvent->AsDragEvent());
1.3147 + break;
1.3148 +
1.3149 + case NS_KEY_UP:
1.3150 + break;
1.3151 +
1.3152 + case NS_KEY_PRESS:
1.3153 + if (nsEventStatus_eConsumeNoDefault != *aStatus) {
1.3154 + WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
1.3155 + //This is to prevent keyboard scrolling while alt modifier in use.
1.3156 + if (!keyEvent->IsAlt()) {
1.3157 + switch(keyEvent->keyCode) {
1.3158 + case NS_VK_TAB:
1.3159 + case NS_VK_F6:
1.3160 + // Handling the tab event after it was sent to content is bad,
1.3161 + // because to the FocusManager the remote-browser looks like one
1.3162 + // element, so we would just move the focus to the next element
1.3163 + // in chrome, instead of handling it in content.
1.3164 + if (dispatchedToContentProcess)
1.3165 + break;
1.3166 +
1.3167 + EnsureDocument(mPresContext);
1.3168 + nsIFocusManager* fm = nsFocusManager::GetFocusManager();
1.3169 + if (fm && mDocument) {
1.3170 + // Shift focus forward or back depending on shift key
1.3171 + bool isDocMove =
1.3172 + keyEvent->IsControl() || keyEvent->keyCode == NS_VK_F6;
1.3173 + uint32_t dir = keyEvent->IsShift() ?
1.3174 + (isDocMove ? static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_BACKWARDDOC) :
1.3175 + static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_BACKWARD)) :
1.3176 + (isDocMove ? static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_FORWARDDOC) :
1.3177 + static_cast<uint32_t>(nsIFocusManager::MOVEFOCUS_FORWARD));
1.3178 + nsCOMPtr<nsIDOMElement> result;
1.3179 + fm->MoveFocus(mDocument->GetWindow(), nullptr, dir,
1.3180 + nsIFocusManager::FLAG_BYKEY,
1.3181 + getter_AddRefs(result));
1.3182 + }
1.3183 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.3184 + break;
1.3185 + }
1.3186 + }
1.3187 + }
1.3188 + break;
1.3189 +
1.3190 + case NS_MOUSE_ENTER:
1.3191 + if (mCurrentTarget) {
1.3192 + nsCOMPtr<nsIContent> targetContent;
1.3193 + mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(targetContent));
1.3194 + SetContentState(targetContent, NS_EVENT_STATE_HOVER);
1.3195 + }
1.3196 + break;
1.3197 +
1.3198 +#ifdef XP_MACOSX
1.3199 + case NS_MOUSE_ACTIVATE:
1.3200 + if (mCurrentTarget) {
1.3201 + nsCOMPtr<nsIContent> targetContent;
1.3202 + mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(targetContent));
1.3203 + if (!NodeAllowsClickThrough(targetContent)) {
1.3204 + *aStatus = nsEventStatus_eConsumeNoDefault;
1.3205 + }
1.3206 + }
1.3207 + break;
1.3208 +#endif
1.3209 + }
1.3210 +
1.3211 + //Reset target frame to null to avoid mistargeting after reentrant event
1.3212 + mCurrentTarget = nullptr;
1.3213 + mCurrentTargetContent = nullptr;
1.3214 +
1.3215 + return ret;
1.3216 +}
1.3217 +
1.3218 +bool
1.3219 +EventStateManager::RemoteQueryContentEvent(WidgetEvent* aEvent)
1.3220 +{
1.3221 + WidgetQueryContentEvent* queryEvent = aEvent->AsQueryContentEvent();
1.3222 + if (!IsTargetCrossProcess(queryEvent)) {
1.3223 + return false;
1.3224 + }
1.3225 + // Will not be handled locally, remote the event
1.3226 + GetCrossProcessTarget()->HandleQueryContentEvent(*queryEvent);
1.3227 + return true;
1.3228 +}
1.3229 +
1.3230 +TabParent*
1.3231 +EventStateManager::GetCrossProcessTarget()
1.3232 +{
1.3233 + return TabParent::GetIMETabParent();
1.3234 +}
1.3235 +
1.3236 +bool
1.3237 +EventStateManager::IsTargetCrossProcess(WidgetGUIEvent* aEvent)
1.3238 +{
1.3239 + // Check to see if there is a focused, editable content in chrome,
1.3240 + // in that case, do not forward IME events to content
1.3241 + nsIContent *focusedContent = GetFocusedContent();
1.3242 + if (focusedContent && focusedContent->IsEditable())
1.3243 + return false;
1.3244 + return TabParent::GetIMETabParent() != nullptr;
1.3245 +}
1.3246 +
1.3247 +void
1.3248 +EventStateManager::NotifyDestroyPresContext(nsPresContext* aPresContext)
1.3249 +{
1.3250 + IMEStateManager::OnDestroyPresContext(aPresContext);
1.3251 + if (mHoverContent) {
1.3252 + // Bug 70855: Presentation is going away, possibly for a reframe.
1.3253 + // Reset the hover state so that if we're recreating the presentation,
1.3254 + // we won't have the old hover state still set in the new presentation,
1.3255 + // as if the new presentation is resized, a new element may be hovered.
1.3256 + SetContentState(nullptr, NS_EVENT_STATE_HOVER);
1.3257 + }
1.3258 + mPointersEnterLeaveHelper.Clear();
1.3259 +}
1.3260 +
1.3261 +void
1.3262 +EventStateManager::SetPresContext(nsPresContext* aPresContext)
1.3263 +{
1.3264 + mPresContext = aPresContext;
1.3265 +}
1.3266 +
1.3267 +void
1.3268 +EventStateManager::ClearFrameRefs(nsIFrame* aFrame)
1.3269 +{
1.3270 + if (aFrame && aFrame == mCurrentTarget) {
1.3271 + mCurrentTargetContent = aFrame->GetContent();
1.3272 + }
1.3273 +}
1.3274 +
1.3275 +void
1.3276 +EventStateManager::UpdateCursor(nsPresContext* aPresContext,
1.3277 + WidgetEvent* aEvent,
1.3278 + nsIFrame* aTargetFrame,
1.3279 + nsEventStatus* aStatus)
1.3280 +{
1.3281 + if (aTargetFrame && IsRemoteTarget(aTargetFrame->GetContent())) {
1.3282 + return;
1.3283 + }
1.3284 +
1.3285 + int32_t cursor = NS_STYLE_CURSOR_DEFAULT;
1.3286 + imgIContainer* container = nullptr;
1.3287 + bool haveHotspot = false;
1.3288 + float hotspotX = 0.0f, hotspotY = 0.0f;
1.3289 +
1.3290 + //If cursor is locked just use the locked one
1.3291 + if (mLockCursor) {
1.3292 + cursor = mLockCursor;
1.3293 + }
1.3294 + //If not locked, look for correct cursor
1.3295 + else if (aTargetFrame) {
1.3296 + nsIFrame::Cursor framecursor;
1.3297 + nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent,
1.3298 + aTargetFrame);
1.3299 + if (NS_FAILED(aTargetFrame->GetCursor(pt, framecursor)))
1.3300 + return; // don't update the cursor if we failed to get it from the frame see bug 118877
1.3301 + cursor = framecursor.mCursor;
1.3302 + container = framecursor.mContainer;
1.3303 + haveHotspot = framecursor.mHaveHotspot;
1.3304 + hotspotX = framecursor.mHotspotX;
1.3305 + hotspotY = framecursor.mHotspotY;
1.3306 + }
1.3307 +
1.3308 + if (Preferences::GetBool("ui.use_activity_cursor", false)) {
1.3309 + // Check whether or not to show the busy cursor
1.3310 + nsCOMPtr<nsIDocShell> docShell(aPresContext->GetDocShell());
1.3311 + if (!docShell) return;
1.3312 + uint32_t busyFlags = nsIDocShell::BUSY_FLAGS_NONE;
1.3313 + docShell->GetBusyFlags(&busyFlags);
1.3314 +
1.3315 + // Show busy cursor everywhere before page loads
1.3316 + // and just replace the arrow cursor after page starts loading
1.3317 + if (busyFlags & nsIDocShell::BUSY_FLAGS_BUSY &&
1.3318 + (cursor == NS_STYLE_CURSOR_AUTO || cursor == NS_STYLE_CURSOR_DEFAULT))
1.3319 + {
1.3320 + cursor = NS_STYLE_CURSOR_SPINNING;
1.3321 + container = nullptr;
1.3322 + }
1.3323 + }
1.3324 +
1.3325 + if (aTargetFrame) {
1.3326 + SetCursor(cursor, container, haveHotspot, hotspotX, hotspotY,
1.3327 + aTargetFrame->GetNearestWidget(), false);
1.3328 + }
1.3329 +
1.3330 + if (mLockCursor || NS_STYLE_CURSOR_AUTO != cursor) {
1.3331 + *aStatus = nsEventStatus_eConsumeDoDefault;
1.3332 + }
1.3333 +}
1.3334 +
1.3335 +nsresult
1.3336 +EventStateManager::SetCursor(int32_t aCursor, imgIContainer* aContainer,
1.3337 + bool aHaveHotspot,
1.3338 + float aHotspotX, float aHotspotY,
1.3339 + nsIWidget* aWidget, bool aLockCursor)
1.3340 +{
1.3341 + EnsureDocument(mPresContext);
1.3342 + NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);
1.3343 + sMouseOverDocument = mDocument.get();
1.3344 +
1.3345 + nsCursor c;
1.3346 +
1.3347 + NS_ENSURE_TRUE(aWidget, NS_ERROR_FAILURE);
1.3348 + if (aLockCursor) {
1.3349 + if (NS_STYLE_CURSOR_AUTO != aCursor) {
1.3350 + mLockCursor = aCursor;
1.3351 + }
1.3352 + else {
1.3353 + //If cursor style is set to auto we unlock the cursor again.
1.3354 + mLockCursor = 0;
1.3355 + }
1.3356 + }
1.3357 + switch (aCursor) {
1.3358 + default:
1.3359 + case NS_STYLE_CURSOR_AUTO:
1.3360 + case NS_STYLE_CURSOR_DEFAULT:
1.3361 + c = eCursor_standard;
1.3362 + break;
1.3363 + case NS_STYLE_CURSOR_POINTER:
1.3364 + c = eCursor_hyperlink;
1.3365 + break;
1.3366 + case NS_STYLE_CURSOR_CROSSHAIR:
1.3367 + c = eCursor_crosshair;
1.3368 + break;
1.3369 + case NS_STYLE_CURSOR_MOVE:
1.3370 + c = eCursor_move;
1.3371 + break;
1.3372 + case NS_STYLE_CURSOR_TEXT:
1.3373 + c = eCursor_select;
1.3374 + break;
1.3375 + case NS_STYLE_CURSOR_WAIT:
1.3376 + c = eCursor_wait;
1.3377 + break;
1.3378 + case NS_STYLE_CURSOR_HELP:
1.3379 + c = eCursor_help;
1.3380 + break;
1.3381 + case NS_STYLE_CURSOR_N_RESIZE:
1.3382 + c = eCursor_n_resize;
1.3383 + break;
1.3384 + case NS_STYLE_CURSOR_S_RESIZE:
1.3385 + c = eCursor_s_resize;
1.3386 + break;
1.3387 + case NS_STYLE_CURSOR_W_RESIZE:
1.3388 + c = eCursor_w_resize;
1.3389 + break;
1.3390 + case NS_STYLE_CURSOR_E_RESIZE:
1.3391 + c = eCursor_e_resize;
1.3392 + break;
1.3393 + case NS_STYLE_CURSOR_NW_RESIZE:
1.3394 + c = eCursor_nw_resize;
1.3395 + break;
1.3396 + case NS_STYLE_CURSOR_SE_RESIZE:
1.3397 + c = eCursor_se_resize;
1.3398 + break;
1.3399 + case NS_STYLE_CURSOR_NE_RESIZE:
1.3400 + c = eCursor_ne_resize;
1.3401 + break;
1.3402 + case NS_STYLE_CURSOR_SW_RESIZE:
1.3403 + c = eCursor_sw_resize;
1.3404 + break;
1.3405 + case NS_STYLE_CURSOR_COPY: // CSS3
1.3406 + c = eCursor_copy;
1.3407 + break;
1.3408 + case NS_STYLE_CURSOR_ALIAS:
1.3409 + c = eCursor_alias;
1.3410 + break;
1.3411 + case NS_STYLE_CURSOR_CONTEXT_MENU:
1.3412 + c = eCursor_context_menu;
1.3413 + break;
1.3414 + case NS_STYLE_CURSOR_CELL:
1.3415 + c = eCursor_cell;
1.3416 + break;
1.3417 + case NS_STYLE_CURSOR_GRAB:
1.3418 + c = eCursor_grab;
1.3419 + break;
1.3420 + case NS_STYLE_CURSOR_GRABBING:
1.3421 + c = eCursor_grabbing;
1.3422 + break;
1.3423 + case NS_STYLE_CURSOR_SPINNING:
1.3424 + c = eCursor_spinning;
1.3425 + break;
1.3426 + case NS_STYLE_CURSOR_ZOOM_IN:
1.3427 + c = eCursor_zoom_in;
1.3428 + break;
1.3429 + case NS_STYLE_CURSOR_ZOOM_OUT:
1.3430 + c = eCursor_zoom_out;
1.3431 + break;
1.3432 + case NS_STYLE_CURSOR_NOT_ALLOWED:
1.3433 + c = eCursor_not_allowed;
1.3434 + break;
1.3435 + case NS_STYLE_CURSOR_COL_RESIZE:
1.3436 + c = eCursor_col_resize;
1.3437 + break;
1.3438 + case NS_STYLE_CURSOR_ROW_RESIZE:
1.3439 + c = eCursor_row_resize;
1.3440 + break;
1.3441 + case NS_STYLE_CURSOR_NO_DROP:
1.3442 + c = eCursor_no_drop;
1.3443 + break;
1.3444 + case NS_STYLE_CURSOR_VERTICAL_TEXT:
1.3445 + c = eCursor_vertical_text;
1.3446 + break;
1.3447 + case NS_STYLE_CURSOR_ALL_SCROLL:
1.3448 + c = eCursor_all_scroll;
1.3449 + break;
1.3450 + case NS_STYLE_CURSOR_NESW_RESIZE:
1.3451 + c = eCursor_nesw_resize;
1.3452 + break;
1.3453 + case NS_STYLE_CURSOR_NWSE_RESIZE:
1.3454 + c = eCursor_nwse_resize;
1.3455 + break;
1.3456 + case NS_STYLE_CURSOR_NS_RESIZE:
1.3457 + c = eCursor_ns_resize;
1.3458 + break;
1.3459 + case NS_STYLE_CURSOR_EW_RESIZE:
1.3460 + c = eCursor_ew_resize;
1.3461 + break;
1.3462 + case NS_STYLE_CURSOR_NONE:
1.3463 + c = eCursor_none;
1.3464 + break;
1.3465 + }
1.3466 +
1.3467 + // First, try the imgIContainer, if non-null
1.3468 + nsresult rv = NS_ERROR_FAILURE;
1.3469 + if (aContainer) {
1.3470 + uint32_t hotspotX, hotspotY;
1.3471 +
1.3472 + // css3-ui says to use the CSS-specified hotspot if present,
1.3473 + // otherwise use the intrinsic hotspot, otherwise use the top left
1.3474 + // corner.
1.3475 + if (aHaveHotspot) {
1.3476 + int32_t imgWidth, imgHeight;
1.3477 + aContainer->GetWidth(&imgWidth);
1.3478 + aContainer->GetHeight(&imgHeight);
1.3479 +
1.3480 + // XXX std::max(NS_lround(x), 0)?
1.3481 + hotspotX = aHotspotX > 0.0f
1.3482 + ? uint32_t(aHotspotX + 0.5f) : uint32_t(0);
1.3483 + if (hotspotX >= uint32_t(imgWidth))
1.3484 + hotspotX = imgWidth - 1;
1.3485 + hotspotY = aHotspotY > 0.0f
1.3486 + ? uint32_t(aHotspotY + 0.5f) : uint32_t(0);
1.3487 + if (hotspotY >= uint32_t(imgHeight))
1.3488 + hotspotY = imgHeight - 1;
1.3489 + } else {
1.3490 + hotspotX = 0;
1.3491 + hotspotY = 0;
1.3492 + nsCOMPtr<nsIProperties> props(do_QueryInterface(aContainer));
1.3493 + if (props) {
1.3494 + nsCOMPtr<nsISupportsPRUint32> hotspotXWrap, hotspotYWrap;
1.3495 +
1.3496 + props->Get("hotspotX", NS_GET_IID(nsISupportsPRUint32), getter_AddRefs(hotspotXWrap));
1.3497 + props->Get("hotspotY", NS_GET_IID(nsISupportsPRUint32), getter_AddRefs(hotspotYWrap));
1.3498 +
1.3499 + if (hotspotXWrap)
1.3500 + hotspotXWrap->GetData(&hotspotX);
1.3501 + if (hotspotYWrap)
1.3502 + hotspotYWrap->GetData(&hotspotY);
1.3503 + }
1.3504 + }
1.3505 +
1.3506 + rv = aWidget->SetCursor(aContainer, hotspotX, hotspotY);
1.3507 + }
1.3508 +
1.3509 + if (NS_FAILED(rv))
1.3510 + aWidget->SetCursor(c);
1.3511 +
1.3512 + return NS_OK;
1.3513 +}
1.3514 +
1.3515 +class MOZ_STACK_CLASS ESMEventCB : public EventDispatchingCallback
1.3516 +{
1.3517 +public:
1.3518 + ESMEventCB(nsIContent* aTarget) : mTarget(aTarget) {}
1.3519 +
1.3520 + virtual void HandleEvent(EventChainPostVisitor& aVisitor)
1.3521 + {
1.3522 + if (aVisitor.mPresContext) {
1.3523 + nsIFrame* frame = aVisitor.mPresContext->GetPrimaryFrameFor(mTarget);
1.3524 + if (frame) {
1.3525 + frame->HandleEvent(aVisitor.mPresContext,
1.3526 + aVisitor.mEvent->AsGUIEvent(),
1.3527 + &aVisitor.mEventStatus);
1.3528 + }
1.3529 + }
1.3530 + }
1.3531 +
1.3532 + nsCOMPtr<nsIContent> mTarget;
1.3533 +};
1.3534 +
1.3535 +/*static*/ bool
1.3536 +EventStateManager::IsHandlingUserInput()
1.3537 +{
1.3538 + if (sUserInputEventDepth <= 0) {
1.3539 + return false;
1.3540 + }
1.3541 +
1.3542 + TimeDuration timeout = nsContentUtils::HandlingUserInputTimeout();
1.3543 + return timeout <= TimeDuration(0) ||
1.3544 + (TimeStamp::Now() - sHandlingInputStart) <= timeout;
1.3545 +}
1.3546 +
1.3547 +nsIFrame*
1.3548 +EventStateManager::DispatchMouseOrPointerEvent(WidgetMouseEvent* aMouseEvent,
1.3549 + uint32_t aMessage,
1.3550 + nsIContent* aTargetContent,
1.3551 + nsIContent* aRelatedContent)
1.3552 +{
1.3553 + // http://dvcs.w3.org/hg/webevents/raw-file/default/mouse-lock.html#methods
1.3554 + // "[When the mouse is locked on an element...e]vents that require the concept
1.3555 + // of a mouse cursor must not be dispatched (for example: mouseover, mouseout).
1.3556 + if (sIsPointerLocked &&
1.3557 + (aMessage == NS_MOUSELEAVE ||
1.3558 + aMessage == NS_MOUSEENTER ||
1.3559 + aMessage == NS_MOUSE_ENTER_SYNTH ||
1.3560 + aMessage == NS_MOUSE_EXIT_SYNTH)) {
1.3561 + mCurrentTargetContent = nullptr;
1.3562 + nsCOMPtr<Element> pointerLockedElement =
1.3563 + do_QueryReferent(EventStateManager::sPointerLockedElement);
1.3564 + if (!pointerLockedElement) {
1.3565 + NS_WARNING("Should have pointer locked element, but didn't.");
1.3566 + return nullptr;
1.3567 + }
1.3568 + nsCOMPtr<nsIContent> content = do_QueryInterface(pointerLockedElement);
1.3569 + return mPresContext->GetPrimaryFrameFor(content);
1.3570 + }
1.3571 +
1.3572 + nsEventStatus status = nsEventStatus_eIgnore;
1.3573 + nsAutoPtr<WidgetMouseEvent> event;
1.3574 + WidgetPointerEvent* sourcePointer = aMouseEvent->AsPointerEvent();
1.3575 + if (sourcePointer) {
1.3576 + PROFILER_LABEL("Input", "DispatchPointerEvent");
1.3577 + nsAutoPtr<WidgetPointerEvent> newPointerEvent;
1.3578 + newPointerEvent =
1.3579 + new WidgetPointerEvent(aMouseEvent->mFlags.mIsTrusted, aMessage,
1.3580 + aMouseEvent->widget);
1.3581 + newPointerEvent->isPrimary = sourcePointer->isPrimary;
1.3582 + newPointerEvent->pointerId = sourcePointer->pointerId;
1.3583 + newPointerEvent->width = sourcePointer->width;
1.3584 + newPointerEvent->height = sourcePointer->height;
1.3585 + newPointerEvent->inputSource = sourcePointer->inputSource;
1.3586 + newPointerEvent->relatedTarget = nsIPresShell::GetPointerCapturingContent(sourcePointer->pointerId)
1.3587 + ? nullptr
1.3588 + : aRelatedContent;
1.3589 + event = newPointerEvent.forget();
1.3590 + } else {
1.3591 + PROFILER_LABEL("Input", "DispatchMouseEvent");
1.3592 + event =
1.3593 + new WidgetMouseEvent(aMouseEvent->mFlags.mIsTrusted, aMessage,
1.3594 + aMouseEvent->widget, WidgetMouseEvent::eReal);
1.3595 + event->relatedTarget = aRelatedContent;
1.3596 + }
1.3597 + event->refPoint = aMouseEvent->refPoint;
1.3598 + event->modifiers = aMouseEvent->modifiers;
1.3599 + event->button = aMouseEvent->button;
1.3600 + event->buttons = aMouseEvent->buttons;
1.3601 + event->pressure = aMouseEvent->pressure;
1.3602 + event->pluginEvent = aMouseEvent->pluginEvent;
1.3603 + event->inputSource = aMouseEvent->inputSource;
1.3604 +
1.3605 + nsWeakFrame previousTarget = mCurrentTarget;
1.3606 +
1.3607 + mCurrentTargetContent = aTargetContent;
1.3608 +
1.3609 + nsIFrame* targetFrame = nullptr;
1.3610 + if (aTargetContent) {
1.3611 + ESMEventCB callback(aTargetContent);
1.3612 + EventDispatcher::Dispatch(aTargetContent, mPresContext, event, nullptr,
1.3613 + &status, &callback);
1.3614 +
1.3615 + // Although the primary frame was checked in event callback,
1.3616 + // it may not be the same object after event dispatching and handling.
1.3617 + // So we need to refetch it.
1.3618 + if (mPresContext) {
1.3619 + targetFrame = mPresContext->GetPrimaryFrameFor(aTargetContent);
1.3620 + }
1.3621 + }
1.3622 +
1.3623 + mCurrentTargetContent = nullptr;
1.3624 + mCurrentTarget = previousTarget;
1.3625 +
1.3626 + return targetFrame;
1.3627 +}
1.3628 +
1.3629 +class EnterLeaveDispatcher
1.3630 +{
1.3631 +public:
1.3632 + EnterLeaveDispatcher(EventStateManager* aESM,
1.3633 + nsIContent* aTarget, nsIContent* aRelatedTarget,
1.3634 + WidgetMouseEvent* aMouseEvent, uint32_t aType)
1.3635 + : mESM(aESM)
1.3636 + , mMouseEvent(aMouseEvent)
1.3637 + , mType(aType)
1.3638 + {
1.3639 + nsPIDOMWindow* win =
1.3640 + aTarget ? aTarget->OwnerDoc()->GetInnerWindow() : nullptr;
1.3641 + if (aMouseEvent->AsPointerEvent() ? win && win->HasPointerEnterLeaveEventListeners() :
1.3642 + win && win->HasMouseEnterLeaveEventListeners()) {
1.3643 + mRelatedTarget = aRelatedTarget ?
1.3644 + aRelatedTarget->FindFirstNonChromeOnlyAccessContent() : nullptr;
1.3645 + nsINode* commonParent = nullptr;
1.3646 + if (aTarget && aRelatedTarget) {
1.3647 + commonParent =
1.3648 + nsContentUtils::GetCommonAncestor(aTarget, aRelatedTarget);
1.3649 + }
1.3650 + nsIContent* current = aTarget;
1.3651 + // Note, it is ok if commonParent is null!
1.3652 + while (current && current != commonParent) {
1.3653 + if (!current->ChromeOnlyAccess()) {
1.3654 + mTargets.AppendObject(current);
1.3655 + }
1.3656 + // mouseenter/leave is fired only on elements.
1.3657 + current = current->GetParent();
1.3658 + }
1.3659 + }
1.3660 + }
1.3661 +
1.3662 + ~EnterLeaveDispatcher()
1.3663 + {
1.3664 + if (mType == NS_MOUSEENTER ||
1.3665 + mType == NS_POINTER_ENTER) {
1.3666 + for (int32_t i = mTargets.Count() - 1; i >= 0; --i) {
1.3667 + mESM->DispatchMouseOrPointerEvent(mMouseEvent, mType, mTargets[i],
1.3668 + mRelatedTarget);
1.3669 + }
1.3670 + } else {
1.3671 + for (int32_t i = 0; i < mTargets.Count(); ++i) {
1.3672 + mESM->DispatchMouseOrPointerEvent(mMouseEvent, mType, mTargets[i],
1.3673 + mRelatedTarget);
1.3674 + }
1.3675 + }
1.3676 + }
1.3677 +
1.3678 + EventStateManager* mESM;
1.3679 + nsCOMArray<nsIContent> mTargets;
1.3680 + nsCOMPtr<nsIContent> mRelatedTarget;
1.3681 + WidgetMouseEvent* mMouseEvent;
1.3682 + uint32_t mType;
1.3683 +};
1.3684 +
1.3685 +void
1.3686 +EventStateManager::NotifyMouseOut(WidgetMouseEvent* aMouseEvent,
1.3687 + nsIContent* aMovingInto)
1.3688 +{
1.3689 + OverOutElementsWrapper* wrapper = GetWrapperByEventID(aMouseEvent);
1.3690 +
1.3691 + if (!wrapper->mLastOverElement)
1.3692 + return;
1.3693 + // Before firing mouseout, check for recursion
1.3694 + if (wrapper->mLastOverElement == wrapper->mFirstOutEventElement)
1.3695 + return;
1.3696 +
1.3697 + if (wrapper->mLastOverFrame) {
1.3698 + // if the frame is associated with a subdocument,
1.3699 + // tell the subdocument that we're moving out of it
1.3700 + nsSubDocumentFrame* subdocFrame = do_QueryFrame(wrapper->mLastOverFrame.GetFrame());
1.3701 + if (subdocFrame) {
1.3702 + nsCOMPtr<nsIDocShell> docshell;
1.3703 + subdocFrame->GetDocShell(getter_AddRefs(docshell));
1.3704 + if (docshell) {
1.3705 + nsRefPtr<nsPresContext> presContext;
1.3706 + docshell->GetPresContext(getter_AddRefs(presContext));
1.3707 +
1.3708 + if (presContext) {
1.3709 + EventStateManager* kidESM = presContext->EventStateManager();
1.3710 + // Not moving into any element in this subdocument
1.3711 + kidESM->NotifyMouseOut(aMouseEvent, nullptr);
1.3712 + }
1.3713 + }
1.3714 + }
1.3715 + }
1.3716 + // That could have caused DOM events which could wreak havoc. Reverify
1.3717 + // things and be careful.
1.3718 + if (!wrapper->mLastOverElement)
1.3719 + return;
1.3720 +
1.3721 + // Store the first mouseOut event we fire and don't refire mouseOut
1.3722 + // to that element while the first mouseOut is still ongoing.
1.3723 + wrapper->mFirstOutEventElement = wrapper->mLastOverElement;
1.3724 +
1.3725 + // Don't touch hover state if aMovingInto is non-null. Caller will update
1.3726 + // hover state itself, and we have optimizations for hover switching between
1.3727 + // two nearby elements both deep in the DOM tree that would be defeated by
1.3728 + // switching the hover state to null here.
1.3729 + bool isPointer = aMouseEvent->eventStructType == NS_POINTER_EVENT;
1.3730 + if (!aMovingInto && !isPointer) {
1.3731 + // Unset :hover
1.3732 + SetContentState(nullptr, NS_EVENT_STATE_HOVER);
1.3733 + }
1.3734 +
1.3735 + EnterLeaveDispatcher leaveDispatcher(this, wrapper->mLastOverElement,
1.3736 + aMovingInto, aMouseEvent,
1.3737 + isPointer ? NS_POINTER_LEAVE :
1.3738 + NS_MOUSELEAVE);
1.3739 +
1.3740 + // Fire mouseout
1.3741 + DispatchMouseOrPointerEvent(aMouseEvent, isPointer ? NS_POINTER_OUT : NS_MOUSE_EXIT_SYNTH,
1.3742 + wrapper->mLastOverElement, aMovingInto);
1.3743 +
1.3744 + wrapper->mLastOverFrame = nullptr;
1.3745 + wrapper->mLastOverElement = nullptr;
1.3746 +
1.3747 + // Turn recursion protection back off
1.3748 + wrapper->mFirstOutEventElement = nullptr;
1.3749 +}
1.3750 +
1.3751 +void
1.3752 +EventStateManager::NotifyMouseOver(WidgetMouseEvent* aMouseEvent,
1.3753 + nsIContent* aContent)
1.3754 +{
1.3755 + NS_ASSERTION(aContent, "Mouse must be over something");
1.3756 +
1.3757 + OverOutElementsWrapper* wrapper = GetWrapperByEventID(aMouseEvent);
1.3758 +
1.3759 + if (wrapper->mLastOverElement == aContent)
1.3760 + return;
1.3761 +
1.3762 + // Before firing mouseover, check for recursion
1.3763 + if (aContent == wrapper->mFirstOverEventElement)
1.3764 + return;
1.3765 +
1.3766 + // Check to see if we're a subdocument and if so update the parent
1.3767 + // document's ESM state to indicate that the mouse is over the
1.3768 + // content associated with our subdocument.
1.3769 + EnsureDocument(mPresContext);
1.3770 + nsIDocument *parentDoc = mDocument->GetParentDocument();
1.3771 + if (parentDoc) {
1.3772 + nsIContent *docContent = parentDoc->FindContentForSubDocument(mDocument);
1.3773 + if (docContent) {
1.3774 + nsIPresShell *parentShell = parentDoc->GetShell();
1.3775 + if (parentShell) {
1.3776 + EventStateManager* parentESM =
1.3777 + parentShell->GetPresContext()->EventStateManager();
1.3778 + parentESM->NotifyMouseOver(aMouseEvent, docContent);
1.3779 + }
1.3780 + }
1.3781 + }
1.3782 + // Firing the DOM event in the parent document could cause all kinds
1.3783 + // of havoc. Reverify and take care.
1.3784 + if (wrapper->mLastOverElement == aContent)
1.3785 + return;
1.3786 +
1.3787 + // Remember mLastOverElement as the related content for the
1.3788 + // DispatchMouseOrPointerEvent() call below, since NotifyMouseOut() resets it, bug 298477.
1.3789 + nsCOMPtr<nsIContent> lastOverElement = wrapper->mLastOverElement;
1.3790 +
1.3791 + bool isPointer = aMouseEvent->eventStructType == NS_POINTER_EVENT;
1.3792 + EnterLeaveDispatcher enterDispatcher(this, aContent, lastOverElement,
1.3793 + aMouseEvent,
1.3794 + isPointer ? NS_POINTER_ENTER :
1.3795 + NS_MOUSEENTER);
1.3796 +
1.3797 + NotifyMouseOut(aMouseEvent, aContent);
1.3798 +
1.3799 + // Store the first mouseOver event we fire and don't refire mouseOver
1.3800 + // to that element while the first mouseOver is still ongoing.
1.3801 + wrapper->mFirstOverEventElement = aContent;
1.3802 +
1.3803 + if (!isPointer) {
1.3804 + SetContentState(aContent, NS_EVENT_STATE_HOVER);
1.3805 + }
1.3806 +
1.3807 + // Fire mouseover
1.3808 + wrapper->mLastOverFrame =
1.3809 + DispatchMouseOrPointerEvent(aMouseEvent,
1.3810 + isPointer ? NS_POINTER_OVER :
1.3811 + NS_MOUSE_ENTER_SYNTH,
1.3812 + aContent, lastOverElement);
1.3813 + wrapper->mLastOverElement = aContent;
1.3814 +
1.3815 + // Turn recursion protection back off
1.3816 + wrapper->mFirstOverEventElement = nullptr;
1.3817 +}
1.3818 +
1.3819 +// Returns the center point of the window's inner content area.
1.3820 +// This is in widget coordinates, i.e. relative to the widget's top
1.3821 +// left corner, not in screen coordinates, the same units that
1.3822 +// UIEvent::refPoint is in.
1.3823 +//
1.3824 +// XXX Hack alert: XXX
1.3825 +// However, we do the computation in integer CSS pixels, NOT device pix,
1.3826 +// in order to fudge around the one-pixel error in innerHeight in fullscreen
1.3827 +// mode (see bug 799523 comment 35, and bug 729011). Using integer CSS pix
1.3828 +// makes us throw away the fractional error that results, rather than having
1.3829 +// it manifest as a potential one-device-pix discrepancy.
1.3830 +static LayoutDeviceIntPoint
1.3831 +GetWindowInnerRectCenter(nsPIDOMWindow* aWindow,
1.3832 + nsIWidget* aWidget,
1.3833 + nsPresContext* aContext)
1.3834 +{
1.3835 + NS_ENSURE_TRUE(aWindow && aWidget && aContext, LayoutDeviceIntPoint(0, 0));
1.3836 +
1.3837 + float cssInnerX = 0.0;
1.3838 + aWindow->GetMozInnerScreenX(&cssInnerX);
1.3839 + int32_t innerX = int32_t(NS_round(cssInnerX));
1.3840 +
1.3841 + float cssInnerY = 0.0;
1.3842 + aWindow->GetMozInnerScreenY(&cssInnerY);
1.3843 + int32_t innerY = int32_t(NS_round(cssInnerY));
1.3844 +
1.3845 + int32_t innerWidth = 0;
1.3846 + aWindow->GetInnerWidth(&innerWidth);
1.3847 +
1.3848 + int32_t innerHeight = 0;
1.3849 + aWindow->GetInnerHeight(&innerHeight);
1.3850 +
1.3851 + nsIntRect screen;
1.3852 + aWidget->GetScreenBounds(screen);
1.3853 +
1.3854 + int32_t cssScreenX = aContext->DevPixelsToIntCSSPixels(screen.x);
1.3855 + int32_t cssScreenY = aContext->DevPixelsToIntCSSPixels(screen.y);
1.3856 +
1.3857 + return LayoutDeviceIntPoint(
1.3858 + aContext->CSSPixelsToDevPixels(innerX - cssScreenX + innerWidth / 2),
1.3859 + aContext->CSSPixelsToDevPixels(innerY - cssScreenY + innerHeight / 2));
1.3860 +}
1.3861 +
1.3862 +void
1.3863 +EventStateManager::GenerateMouseEnterExit(WidgetMouseEvent* aMouseEvent)
1.3864 +{
1.3865 + EnsureDocument(mPresContext);
1.3866 + if (!mDocument)
1.3867 + return;
1.3868 +
1.3869 + // Hold onto old target content through the event and reset after.
1.3870 + nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
1.3871 +
1.3872 + switch(aMouseEvent->message) {
1.3873 + case NS_MOUSE_MOVE:
1.3874 + {
1.3875 + // Mouse movement is reported on the MouseEvent.movement{X,Y} fields.
1.3876 + // Movement is calculated in UIEvent::GetMovementPoint() as:
1.3877 + // previous_mousemove_refPoint - current_mousemove_refPoint.
1.3878 + if (sIsPointerLocked && aMouseEvent->widget) {
1.3879 + // The pointer is locked. If the pointer is not located at the center of
1.3880 + // the window, dispatch a synthetic mousemove to return the pointer there.
1.3881 + // Doing this between "real" pointer moves gives the impression that the
1.3882 + // (locked) pointer can continue moving and won't stop at the screen
1.3883 + // boundary. We cancel the synthetic event so that we don't end up
1.3884 + // dispatching the centering move event to content.
1.3885 + LayoutDeviceIntPoint center =
1.3886 + GetWindowInnerRectCenter(mDocument->GetWindow(), aMouseEvent->widget,
1.3887 + mPresContext);
1.3888 + aMouseEvent->lastRefPoint = center;
1.3889 + if (aMouseEvent->refPoint != center) {
1.3890 + // Mouse move doesn't finish at the center of the window. Dispatch a
1.3891 + // synthetic native mouse event to move the pointer back to the center
1.3892 + // of the window, to faciliate more movement. But first, record that
1.3893 + // we've dispatched a synthetic mouse movement, so we can cancel it
1.3894 + // in the other branch here.
1.3895 + sSynthCenteringPoint = center;
1.3896 + aMouseEvent->widget->SynthesizeNativeMouseMove(
1.3897 + LayoutDeviceIntPoint::ToUntyped(center) +
1.3898 + aMouseEvent->widget->WidgetToScreenOffset());
1.3899 + } else if (aMouseEvent->refPoint == sSynthCenteringPoint) {
1.3900 + // This is the "synthetic native" event we dispatched to re-center the
1.3901 + // pointer. Cancel it so we don't expose the centering move to content.
1.3902 + aMouseEvent->mFlags.mPropagationStopped = true;
1.3903 + // Clear sSynthCenteringPoint so we don't cancel other events
1.3904 + // targeted at the center.
1.3905 + sSynthCenteringPoint = kInvalidRefPoint;
1.3906 + }
1.3907 + } else if (sLastRefPoint == kInvalidRefPoint) {
1.3908 + // We don't have a valid previous mousemove refPoint. This is either
1.3909 + // the first move we've encountered, or the mouse has just re-entered
1.3910 + // the application window. We should report (0,0) movement for this
1.3911 + // case, so make the current and previous refPoints the same.
1.3912 + aMouseEvent->lastRefPoint = aMouseEvent->refPoint;
1.3913 + } else {
1.3914 + aMouseEvent->lastRefPoint = sLastRefPoint;
1.3915 + }
1.3916 +
1.3917 + // Update the last known refPoint with the current refPoint.
1.3918 + sLastRefPoint = aMouseEvent->refPoint;
1.3919 +
1.3920 + }
1.3921 + case NS_POINTER_MOVE:
1.3922 + case NS_POINTER_DOWN:
1.3923 + {
1.3924 + // Get the target content target (mousemove target == mouseover target)
1.3925 + nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
1.3926 + if (!targetElement) {
1.3927 + // We're always over the document root, even if we're only
1.3928 + // over dead space in a page (whose frame is not associated with
1.3929 + // any content) or in print preview dead space
1.3930 + targetElement = mDocument->GetRootElement();
1.3931 + }
1.3932 + if (targetElement) {
1.3933 + NotifyMouseOver(aMouseEvent, targetElement);
1.3934 + }
1.3935 + }
1.3936 + break;
1.3937 + case NS_POINTER_UP:
1.3938 + {
1.3939 + // Get the target content target (mousemove target == mouseover target)
1.3940 + nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
1.3941 + if (!targetElement) {
1.3942 + // We're always over the document root, even if we're only
1.3943 + // over dead space in a page (whose frame is not associated with
1.3944 + // any content) or in print preview dead space
1.3945 + targetElement = mDocument->GetRootElement();
1.3946 + }
1.3947 + if (targetElement) {
1.3948 + OverOutElementsWrapper* helper = GetWrapperByEventID(aMouseEvent);
1.3949 + if (helper) {
1.3950 + helper->mLastOverElement = targetElement;
1.3951 + }
1.3952 + NotifyMouseOut(aMouseEvent, nullptr);
1.3953 + }
1.3954 + }
1.3955 + break;
1.3956 + case NS_POINTER_LEAVE:
1.3957 + case NS_POINTER_CANCEL:
1.3958 + case NS_MOUSE_EXIT:
1.3959 + {
1.3960 + // This is actually the window mouse exit or pointer leave event. We're not moving
1.3961 + // into any new element.
1.3962 +
1.3963 + OverOutElementsWrapper* helper = GetWrapperByEventID(aMouseEvent);
1.3964 + if (helper->mLastOverFrame &&
1.3965 + nsContentUtils::GetTopLevelWidget(aMouseEvent->widget) !=
1.3966 + nsContentUtils::GetTopLevelWidget(helper->mLastOverFrame->GetNearestWidget())) {
1.3967 + // the Mouse/PointerOut event widget doesn't have same top widget with
1.3968 + // mLastOverFrame, it's a spurious event for mLastOverFrame
1.3969 + break;
1.3970 + }
1.3971 +
1.3972 + // Reset sLastRefPoint, so that we'll know not to report any
1.3973 + // movement the next time we re-enter the window.
1.3974 + sLastRefPoint = kInvalidRefPoint;
1.3975 +
1.3976 + NotifyMouseOut(aMouseEvent, nullptr);
1.3977 + }
1.3978 + break;
1.3979 + }
1.3980 +
1.3981 + // reset mCurretTargetContent to what it was
1.3982 + mCurrentTargetContent = targetBeforeEvent;
1.3983 +}
1.3984 +
1.3985 +OverOutElementsWrapper*
1.3986 +EventStateManager::GetWrapperByEventID(WidgetMouseEvent* aEvent)
1.3987 +{
1.3988 + WidgetPointerEvent* pointer = aEvent->AsPointerEvent();
1.3989 + if (!pointer) {
1.3990 + MOZ_ASSERT(aEvent->AsMouseEvent() != nullptr);
1.3991 + if (!mMouseEnterLeaveHelper) {
1.3992 + mMouseEnterLeaveHelper = new OverOutElementsWrapper();
1.3993 + }
1.3994 + return mMouseEnterLeaveHelper;
1.3995 + }
1.3996 + nsRefPtr<OverOutElementsWrapper> helper;
1.3997 + if (!mPointersEnterLeaveHelper.Get(pointer->pointerId, getter_AddRefs(helper))) {
1.3998 + helper = new OverOutElementsWrapper();
1.3999 + mPointersEnterLeaveHelper.Put(pointer->pointerId, helper);
1.4000 + }
1.4001 +
1.4002 + return helper;
1.4003 +}
1.4004 +
1.4005 +void
1.4006 +EventStateManager::SetPointerLock(nsIWidget* aWidget,
1.4007 + nsIContent* aElement)
1.4008 +{
1.4009 + // NOTE: aElement will be nullptr when unlocking.
1.4010 + sIsPointerLocked = !!aElement;
1.4011 +
1.4012 + if (!aWidget) {
1.4013 + return;
1.4014 + }
1.4015 +
1.4016 + // Reset mouse wheel transaction
1.4017 + WheelTransaction::EndTransaction();
1.4018 +
1.4019 + // Deal with DnD events
1.4020 + nsCOMPtr<nsIDragService> dragService =
1.4021 + do_GetService("@mozilla.org/widget/dragservice;1");
1.4022 +
1.4023 + if (sIsPointerLocked) {
1.4024 + // Store the last known ref point so we can reposition the pointer after unlock.
1.4025 + mPreLockPoint = sLastRefPoint;
1.4026 +
1.4027 + // Fire a synthetic mouse move to ensure event state is updated. We first
1.4028 + // set the mouse to the center of the window, so that the mouse event
1.4029 + // doesn't report any movement.
1.4030 + sLastRefPoint = GetWindowInnerRectCenter(aElement->OwnerDoc()->GetWindow(),
1.4031 + aWidget,
1.4032 + mPresContext);
1.4033 + aWidget->SynthesizeNativeMouseMove(
1.4034 + LayoutDeviceIntPoint::ToUntyped(sLastRefPoint) + aWidget->WidgetToScreenOffset());
1.4035 +
1.4036 + // Retarget all events to this element via capture.
1.4037 + nsIPresShell::SetCapturingContent(aElement, CAPTURE_POINTERLOCK);
1.4038 +
1.4039 + // Suppress DnD
1.4040 + if (dragService) {
1.4041 + dragService->Suppress();
1.4042 + }
1.4043 + } else {
1.4044 + // Unlocking, so return pointer to the original position by firing a
1.4045 + // synthetic mouse event. We first reset sLastRefPoint to its
1.4046 + // pre-pointerlock position, so that the synthetic mouse event reports
1.4047 + // no movement.
1.4048 + sLastRefPoint = mPreLockPoint;
1.4049 + aWidget->SynthesizeNativeMouseMove(
1.4050 + LayoutDeviceIntPoint::ToUntyped(mPreLockPoint) + aWidget->WidgetToScreenOffset());
1.4051 +
1.4052 + // Don't retarget events to this element any more.
1.4053 + nsIPresShell::SetCapturingContent(nullptr, CAPTURE_POINTERLOCK);
1.4054 +
1.4055 + // Unsuppress DnD
1.4056 + if (dragService) {
1.4057 + dragService->Unsuppress();
1.4058 + }
1.4059 + }
1.4060 +}
1.4061 +
1.4062 +void
1.4063 +EventStateManager::GenerateDragDropEnterExit(nsPresContext* aPresContext,
1.4064 + WidgetDragEvent* aDragEvent)
1.4065 +{
1.4066 + //Hold onto old target content through the event and reset after.
1.4067 + nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
1.4068 +
1.4069 + switch(aDragEvent->message) {
1.4070 + case NS_DRAGDROP_OVER:
1.4071 + {
1.4072 + // when dragging from one frame to another, events are fired in the
1.4073 + // order: dragexit, dragenter, dragleave
1.4074 + if (sLastDragOverFrame != mCurrentTarget) {
1.4075 + //We'll need the content, too, to check if it changed separately from the frames.
1.4076 + nsCOMPtr<nsIContent> lastContent;
1.4077 + nsCOMPtr<nsIContent> targetContent;
1.4078 + mCurrentTarget->GetContentForEvent(aDragEvent,
1.4079 + getter_AddRefs(targetContent));
1.4080 +
1.4081 + if (sLastDragOverFrame) {
1.4082 + //The frame has changed but the content may not have. Check before dispatching to content
1.4083 + sLastDragOverFrame->GetContentForEvent(aDragEvent,
1.4084 + getter_AddRefs(lastContent));
1.4085 +
1.4086 + FireDragEnterOrExit(sLastDragOverFrame->PresContext(),
1.4087 + aDragEvent, NS_DRAGDROP_EXIT_SYNTH,
1.4088 + targetContent, lastContent, sLastDragOverFrame);
1.4089 + }
1.4090 +
1.4091 + FireDragEnterOrExit(aPresContext, aDragEvent, NS_DRAGDROP_ENTER,
1.4092 + lastContent, targetContent, mCurrentTarget);
1.4093 +
1.4094 + if (sLastDragOverFrame) {
1.4095 + FireDragEnterOrExit(sLastDragOverFrame->PresContext(),
1.4096 + aDragEvent, NS_DRAGDROP_LEAVE_SYNTH,
1.4097 + targetContent, lastContent, sLastDragOverFrame);
1.4098 + }
1.4099 +
1.4100 + sLastDragOverFrame = mCurrentTarget;
1.4101 + }
1.4102 + }
1.4103 + break;
1.4104 +
1.4105 + case NS_DRAGDROP_EXIT:
1.4106 + {
1.4107 + //This is actually the window mouse exit event.
1.4108 + if (sLastDragOverFrame) {
1.4109 + nsCOMPtr<nsIContent> lastContent;
1.4110 + sLastDragOverFrame->GetContentForEvent(aDragEvent,
1.4111 + getter_AddRefs(lastContent));
1.4112 +
1.4113 + nsRefPtr<nsPresContext> lastDragOverFramePresContext = sLastDragOverFrame->PresContext();
1.4114 + FireDragEnterOrExit(lastDragOverFramePresContext,
1.4115 + aDragEvent, NS_DRAGDROP_EXIT_SYNTH,
1.4116 + nullptr, lastContent, sLastDragOverFrame);
1.4117 + FireDragEnterOrExit(lastDragOverFramePresContext,
1.4118 + aDragEvent, NS_DRAGDROP_LEAVE_SYNTH,
1.4119 + nullptr, lastContent, sLastDragOverFrame);
1.4120 +
1.4121 + sLastDragOverFrame = nullptr;
1.4122 + }
1.4123 + }
1.4124 + break;
1.4125 + }
1.4126 +
1.4127 + //reset mCurretTargetContent to what it was
1.4128 + mCurrentTargetContent = targetBeforeEvent;
1.4129 +
1.4130 + // Now flush all pending notifications, for better responsiveness.
1.4131 + FlushPendingEvents(aPresContext);
1.4132 +}
1.4133 +
1.4134 +void
1.4135 +EventStateManager::FireDragEnterOrExit(nsPresContext* aPresContext,
1.4136 + WidgetDragEvent* aDragEvent,
1.4137 + uint32_t aMsg,
1.4138 + nsIContent* aRelatedTarget,
1.4139 + nsIContent* aTargetContent,
1.4140 + nsWeakFrame& aTargetFrame)
1.4141 +{
1.4142 + nsEventStatus status = nsEventStatus_eIgnore;
1.4143 + WidgetDragEvent event(aDragEvent->mFlags.mIsTrusted, aMsg,
1.4144 + aDragEvent->widget);
1.4145 + event.refPoint = aDragEvent->refPoint;
1.4146 + event.modifiers = aDragEvent->modifiers;
1.4147 + event.buttons = aDragEvent->buttons;
1.4148 + event.relatedTarget = aRelatedTarget;
1.4149 + event.inputSource = aDragEvent->inputSource;
1.4150 +
1.4151 + mCurrentTargetContent = aTargetContent;
1.4152 +
1.4153 + if (aTargetContent != aRelatedTarget) {
1.4154 + //XXX This event should still go somewhere!!
1.4155 + if (aTargetContent) {
1.4156 + EventDispatcher::Dispatch(aTargetContent, aPresContext, &event,
1.4157 + nullptr, &status);
1.4158 + }
1.4159 +
1.4160 + // adjust the drag hover if the dragenter event was cancelled or this is a drag exit
1.4161 + if (status == nsEventStatus_eConsumeNoDefault || aMsg == NS_DRAGDROP_EXIT)
1.4162 + SetContentState((aMsg == NS_DRAGDROP_ENTER) ? aTargetContent : nullptr,
1.4163 + NS_EVENT_STATE_DRAGOVER);
1.4164 +
1.4165 + // collect any changes to moz cursor settings stored in the event's
1.4166 + // data transfer.
1.4167 + if (aMsg == NS_DRAGDROP_LEAVE_SYNTH || aMsg == NS_DRAGDROP_EXIT_SYNTH ||
1.4168 + aMsg == NS_DRAGDROP_ENTER)
1.4169 + UpdateDragDataTransfer(&event);
1.4170 + }
1.4171 +
1.4172 + // Finally dispatch the event to the frame
1.4173 + if (aTargetFrame)
1.4174 + aTargetFrame->HandleEvent(aPresContext, &event, &status);
1.4175 +}
1.4176 +
1.4177 +void
1.4178 +EventStateManager::UpdateDragDataTransfer(WidgetDragEvent* dragEvent)
1.4179 +{
1.4180 + NS_ASSERTION(dragEvent, "drag event is null in UpdateDragDataTransfer!");
1.4181 + if (!dragEvent->dataTransfer)
1.4182 + return;
1.4183 +
1.4184 + nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
1.4185 +
1.4186 + if (dragSession) {
1.4187 + // the initial dataTransfer is the one from the dragstart event that
1.4188 + // was set on the dragSession when the drag began.
1.4189 + nsCOMPtr<nsIDOMDataTransfer> initialDataTransfer;
1.4190 + dragSession->GetDataTransfer(getter_AddRefs(initialDataTransfer));
1.4191 + if (initialDataTransfer) {
1.4192 + // retrieve the current moz cursor setting and save it.
1.4193 + nsAutoString mozCursor;
1.4194 + dragEvent->dataTransfer->GetMozCursor(mozCursor);
1.4195 + initialDataTransfer->SetMozCursor(mozCursor);
1.4196 + }
1.4197 + }
1.4198 +}
1.4199 +
1.4200 +nsresult
1.4201 +EventStateManager::SetClickCount(nsPresContext* aPresContext,
1.4202 + WidgetMouseEvent* aEvent,
1.4203 + nsEventStatus* aStatus)
1.4204 +{
1.4205 + nsCOMPtr<nsIContent> mouseContent;
1.4206 + nsIContent* mouseContentParent = nullptr;
1.4207 + mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(mouseContent));
1.4208 + if (mouseContent) {
1.4209 + if (mouseContent->IsNodeOfType(nsINode::eTEXT)) {
1.4210 + mouseContent = mouseContent->GetParent();
1.4211 + }
1.4212 + if (mouseContent && mouseContent->IsRootOfNativeAnonymousSubtree()) {
1.4213 + mouseContentParent = mouseContent->GetParent();
1.4214 + }
1.4215 + }
1.4216 +
1.4217 + switch (aEvent->button) {
1.4218 + case WidgetMouseEvent::eLeftButton:
1.4219 + if (aEvent->message == NS_MOUSE_BUTTON_DOWN) {
1.4220 + mLastLeftMouseDownContent = mouseContent;
1.4221 + mLastLeftMouseDownContentParent = mouseContentParent;
1.4222 + } else if (aEvent->message == NS_MOUSE_BUTTON_UP) {
1.4223 + if (mLastLeftMouseDownContent == mouseContent ||
1.4224 + mLastLeftMouseDownContentParent == mouseContent ||
1.4225 + mLastLeftMouseDownContent == mouseContentParent) {
1.4226 + aEvent->clickCount = mLClickCount;
1.4227 + mLClickCount = 0;
1.4228 + } else {
1.4229 + aEvent->clickCount = 0;
1.4230 + }
1.4231 + mLastLeftMouseDownContent = nullptr;
1.4232 + mLastLeftMouseDownContentParent = nullptr;
1.4233 + }
1.4234 + break;
1.4235 +
1.4236 + case WidgetMouseEvent::eMiddleButton:
1.4237 + if (aEvent->message == NS_MOUSE_BUTTON_DOWN) {
1.4238 + mLastMiddleMouseDownContent = mouseContent;
1.4239 + mLastMiddleMouseDownContentParent = mouseContentParent;
1.4240 + } else if (aEvent->message == NS_MOUSE_BUTTON_UP) {
1.4241 + if (mLastMiddleMouseDownContent == mouseContent ||
1.4242 + mLastMiddleMouseDownContentParent == mouseContent ||
1.4243 + mLastMiddleMouseDownContent == mouseContentParent) {
1.4244 + aEvent->clickCount = mMClickCount;
1.4245 + mMClickCount = 0;
1.4246 + } else {
1.4247 + aEvent->clickCount = 0;
1.4248 + }
1.4249 + mLastMiddleMouseDownContent = nullptr;
1.4250 + mLastMiddleMouseDownContentParent = nullptr;
1.4251 + }
1.4252 + break;
1.4253 +
1.4254 + case WidgetMouseEvent::eRightButton:
1.4255 + if (aEvent->message == NS_MOUSE_BUTTON_DOWN) {
1.4256 + mLastRightMouseDownContent = mouseContent;
1.4257 + mLastRightMouseDownContentParent = mouseContentParent;
1.4258 + } else if (aEvent->message == NS_MOUSE_BUTTON_UP) {
1.4259 + if (mLastRightMouseDownContent == mouseContent ||
1.4260 + mLastRightMouseDownContentParent == mouseContent ||
1.4261 + mLastRightMouseDownContent == mouseContentParent) {
1.4262 + aEvent->clickCount = mRClickCount;
1.4263 + mRClickCount = 0;
1.4264 + } else {
1.4265 + aEvent->clickCount = 0;
1.4266 + }
1.4267 + mLastRightMouseDownContent = nullptr;
1.4268 + mLastRightMouseDownContentParent = nullptr;
1.4269 + }
1.4270 + break;
1.4271 + }
1.4272 +
1.4273 + return NS_OK;
1.4274 +}
1.4275 +
1.4276 +nsresult
1.4277 +EventStateManager::CheckForAndDispatchClick(nsPresContext* aPresContext,
1.4278 + WidgetMouseEvent* aEvent,
1.4279 + nsEventStatus* aStatus)
1.4280 +{
1.4281 + nsresult ret = NS_OK;
1.4282 +
1.4283 + //If mouse is still over same element, clickcount will be > 1.
1.4284 + //If it has moved it will be zero, so no click.
1.4285 + if (0 != aEvent->clickCount) {
1.4286 + //Check that the window isn't disabled before firing a click
1.4287 + //(see bug 366544).
1.4288 + if (aEvent->widget && !aEvent->widget->IsEnabled()) {
1.4289 + return ret;
1.4290 + }
1.4291 + //fire click
1.4292 + bool notDispatchToContents =
1.4293 + (aEvent->button == WidgetMouseEvent::eMiddleButton ||
1.4294 + aEvent->button == WidgetMouseEvent::eRightButton);
1.4295 +
1.4296 + WidgetMouseEvent event(aEvent->mFlags.mIsTrusted, NS_MOUSE_CLICK,
1.4297 + aEvent->widget, WidgetMouseEvent::eReal);
1.4298 + event.refPoint = aEvent->refPoint;
1.4299 + event.clickCount = aEvent->clickCount;
1.4300 + event.modifiers = aEvent->modifiers;
1.4301 + event.buttons = aEvent->buttons;
1.4302 + event.time = aEvent->time;
1.4303 + event.mFlags.mNoContentDispatch = notDispatchToContents;
1.4304 + event.button = aEvent->button;
1.4305 + event.inputSource = aEvent->inputSource;
1.4306 +
1.4307 + nsCOMPtr<nsIPresShell> presShell = mPresContext->GetPresShell();
1.4308 + if (presShell) {
1.4309 + nsCOMPtr<nsIContent> mouseContent = GetEventTargetContent(aEvent);
1.4310 + if (!mouseContent && !mCurrentTarget) {
1.4311 + return NS_OK;
1.4312 + }
1.4313 +
1.4314 + // HandleEvent clears out mCurrentTarget which we might need again
1.4315 + nsWeakFrame currentTarget = mCurrentTarget;
1.4316 + ret = presShell->HandleEventWithTarget(&event, currentTarget,
1.4317 + mouseContent, aStatus);
1.4318 + if (NS_SUCCEEDED(ret) && aEvent->clickCount == 2) {
1.4319 + //fire double click
1.4320 + WidgetMouseEvent event2(aEvent->mFlags.mIsTrusted, NS_MOUSE_DOUBLECLICK,
1.4321 + aEvent->widget, WidgetMouseEvent::eReal);
1.4322 + event2.refPoint = aEvent->refPoint;
1.4323 + event2.clickCount = aEvent->clickCount;
1.4324 + event2.modifiers = aEvent->modifiers;
1.4325 + event2.buttons = aEvent->buttons;
1.4326 + event2.mFlags.mNoContentDispatch = notDispatchToContents;
1.4327 + event2.button = aEvent->button;
1.4328 + event2.inputSource = aEvent->inputSource;
1.4329 +
1.4330 + ret = presShell->HandleEventWithTarget(&event2, currentTarget,
1.4331 + mouseContent, aStatus);
1.4332 + }
1.4333 + }
1.4334 + }
1.4335 + return ret;
1.4336 +}
1.4337 +
1.4338 +nsIFrame*
1.4339 +EventStateManager::GetEventTarget()
1.4340 +{
1.4341 + nsIPresShell *shell;
1.4342 + if (mCurrentTarget ||
1.4343 + !mPresContext ||
1.4344 + !(shell = mPresContext->GetPresShell())) {
1.4345 + return mCurrentTarget;
1.4346 + }
1.4347 +
1.4348 + if (mCurrentTargetContent) {
1.4349 + mCurrentTarget = mPresContext->GetPrimaryFrameFor(mCurrentTargetContent);
1.4350 + if (mCurrentTarget) {
1.4351 + return mCurrentTarget;
1.4352 + }
1.4353 + }
1.4354 +
1.4355 + nsIFrame* frame = shell->GetEventTargetFrame();
1.4356 + return (mCurrentTarget = frame);
1.4357 +}
1.4358 +
1.4359 +already_AddRefed<nsIContent>
1.4360 +EventStateManager::GetEventTargetContent(WidgetEvent* aEvent)
1.4361 +{
1.4362 + if (aEvent &&
1.4363 + (aEvent->message == NS_FOCUS_CONTENT ||
1.4364 + aEvent->message == NS_BLUR_CONTENT)) {
1.4365 + nsCOMPtr<nsIContent> content = GetFocusedContent();
1.4366 + return content.forget();
1.4367 + }
1.4368 +
1.4369 + if (mCurrentTargetContent) {
1.4370 + nsCOMPtr<nsIContent> content = mCurrentTargetContent;
1.4371 + return content.forget();
1.4372 + }
1.4373 +
1.4374 + nsCOMPtr<nsIContent> content;
1.4375 +
1.4376 + nsIPresShell *presShell = mPresContext->GetPresShell();
1.4377 + if (presShell) {
1.4378 + content = presShell->GetEventTargetContent(aEvent);
1.4379 + }
1.4380 +
1.4381 + // Some events here may set mCurrentTarget but not set the corresponding
1.4382 + // event target in the PresShell.
1.4383 + if (!content && mCurrentTarget) {
1.4384 + mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(content));
1.4385 + }
1.4386 +
1.4387 + return content.forget();
1.4388 +}
1.4389 +
1.4390 +static Element*
1.4391 +GetLabelTarget(nsIContent* aPossibleLabel)
1.4392 +{
1.4393 + mozilla::dom::HTMLLabelElement* label =
1.4394 + mozilla::dom::HTMLLabelElement::FromContent(aPossibleLabel);
1.4395 + if (!label)
1.4396 + return nullptr;
1.4397 +
1.4398 + return label->GetLabeledElement();
1.4399 +}
1.4400 +
1.4401 +static nsIContent* FindCommonAncestor(nsIContent *aNode1, nsIContent *aNode2)
1.4402 +{
1.4403 + // Find closest common ancestor
1.4404 + if (aNode1 && aNode2) {
1.4405 + // Find the nearest common ancestor by counting the distance to the
1.4406 + // root and then walking up again, in pairs.
1.4407 + int32_t offset = 0;
1.4408 + nsIContent *anc1 = aNode1;
1.4409 + for (;;) {
1.4410 + ++offset;
1.4411 + nsIContent* parent = anc1->GetParent();
1.4412 + if (!parent)
1.4413 + break;
1.4414 + anc1 = parent;
1.4415 + }
1.4416 + nsIContent *anc2 = aNode2;
1.4417 + for (;;) {
1.4418 + --offset;
1.4419 + nsIContent* parent = anc2->GetParent();
1.4420 + if (!parent)
1.4421 + break;
1.4422 + anc2 = parent;
1.4423 + }
1.4424 + if (anc1 == anc2) {
1.4425 + anc1 = aNode1;
1.4426 + anc2 = aNode2;
1.4427 + while (offset > 0) {
1.4428 + anc1 = anc1->GetParent();
1.4429 + --offset;
1.4430 + }
1.4431 + while (offset < 0) {
1.4432 + anc2 = anc2->GetParent();
1.4433 + ++offset;
1.4434 + }
1.4435 + while (anc1 != anc2) {
1.4436 + anc1 = anc1->GetParent();
1.4437 + anc2 = anc2->GetParent();
1.4438 + }
1.4439 + return anc1;
1.4440 + }
1.4441 + }
1.4442 + return nullptr;
1.4443 +}
1.4444 +
1.4445 +static Element*
1.4446 +GetParentElement(Element* aElement)
1.4447 +{
1.4448 + nsIContent* p = aElement->GetParent();
1.4449 + return (p && p->IsElement()) ? p->AsElement() : nullptr;
1.4450 +}
1.4451 +
1.4452 +/* static */
1.4453 +void
1.4454 +EventStateManager::SetFullScreenState(Element* aElement, bool aIsFullScreen)
1.4455 +{
1.4456 + DoStateChange(aElement, NS_EVENT_STATE_FULL_SCREEN, aIsFullScreen);
1.4457 + Element* ancestor = aElement;
1.4458 + while ((ancestor = GetParentElement(ancestor))) {
1.4459 + DoStateChange(ancestor, NS_EVENT_STATE_FULL_SCREEN_ANCESTOR, aIsFullScreen);
1.4460 + }
1.4461 +}
1.4462 +
1.4463 +/* static */
1.4464 +inline void
1.4465 +EventStateManager::DoStateChange(Element* aElement, EventStates aState,
1.4466 + bool aAddState)
1.4467 +{
1.4468 + if (aAddState) {
1.4469 + aElement->AddStates(aState);
1.4470 + } else {
1.4471 + aElement->RemoveStates(aState);
1.4472 + }
1.4473 +}
1.4474 +
1.4475 +/* static */
1.4476 +inline void
1.4477 +EventStateManager::DoStateChange(nsIContent* aContent, EventStates aState,
1.4478 + bool aStateAdded)
1.4479 +{
1.4480 + if (aContent->IsElement()) {
1.4481 + DoStateChange(aContent->AsElement(), aState, aStateAdded);
1.4482 + }
1.4483 +}
1.4484 +
1.4485 +/* static */
1.4486 +void
1.4487 +EventStateManager::UpdateAncestorState(nsIContent* aStartNode,
1.4488 + nsIContent* aStopBefore,
1.4489 + EventStates aState,
1.4490 + bool aAddState)
1.4491 +{
1.4492 + for (; aStartNode && aStartNode != aStopBefore;
1.4493 + aStartNode = aStartNode->GetParent()) {
1.4494 + // We might be starting with a non-element (e.g. a text node) and
1.4495 + // if someone is doing something weird might be ending with a
1.4496 + // non-element too (e.g. a document fragment)
1.4497 + if (!aStartNode->IsElement()) {
1.4498 + continue;
1.4499 + }
1.4500 + Element* element = aStartNode->AsElement();
1.4501 + DoStateChange(element, aState, aAddState);
1.4502 + Element* labelTarget = GetLabelTarget(element);
1.4503 + if (labelTarget) {
1.4504 + DoStateChange(labelTarget, aState, aAddState);
1.4505 + }
1.4506 + }
1.4507 +
1.4508 + if (aAddState) {
1.4509 + // We might be in a situation where a node was in hover both
1.4510 + // because it was hovered and because the label for it was
1.4511 + // hovered, and while we stopped hovering the node the label is
1.4512 + // still hovered. Or we might have had two nested labels for the
1.4513 + // same node, and while one is no longer hovered the other still
1.4514 + // is. In that situation, the label that's still hovered will be
1.4515 + // aStopBefore or some ancestor of it, and the call we just made
1.4516 + // to UpdateAncestorState with aAddState = false would have
1.4517 + // removed the hover state from the node. But the node should
1.4518 + // still be in hover state. To handle this situation we need to
1.4519 + // keep walking up the tree and any time we find a label mark its
1.4520 + // corresponding node as still in our state.
1.4521 + for ( ; aStartNode; aStartNode = aStartNode->GetParent()) {
1.4522 + if (!aStartNode->IsElement()) {
1.4523 + continue;
1.4524 + }
1.4525 +
1.4526 + Element* labelTarget = GetLabelTarget(aStartNode->AsElement());
1.4527 + if (labelTarget && !labelTarget->State().HasState(aState)) {
1.4528 + DoStateChange(labelTarget, aState, true);
1.4529 + }
1.4530 + }
1.4531 + }
1.4532 +}
1.4533 +
1.4534 +bool
1.4535 +EventStateManager::SetContentState(nsIContent* aContent, EventStates aState)
1.4536 +{
1.4537 + // We manage 4 states here: ACTIVE, HOVER, DRAGOVER, URLTARGET
1.4538 + // The input must be exactly one of them.
1.4539 + NS_PRECONDITION(aState == NS_EVENT_STATE_ACTIVE ||
1.4540 + aState == NS_EVENT_STATE_HOVER ||
1.4541 + aState == NS_EVENT_STATE_DRAGOVER ||
1.4542 + aState == NS_EVENT_STATE_URLTARGET,
1.4543 + "Unexpected state");
1.4544 +
1.4545 + nsCOMPtr<nsIContent> notifyContent1;
1.4546 + nsCOMPtr<nsIContent> notifyContent2;
1.4547 + bool updateAncestors;
1.4548 +
1.4549 + if (aState == NS_EVENT_STATE_HOVER || aState == NS_EVENT_STATE_ACTIVE) {
1.4550 + // Hover and active are hierarchical
1.4551 + updateAncestors = true;
1.4552 +
1.4553 + // check to see that this state is allowed by style. Check dragover too?
1.4554 + // XXX Is this even what we want?
1.4555 + if (mCurrentTarget)
1.4556 + {
1.4557 + const nsStyleUserInterface* ui = mCurrentTarget->StyleUserInterface();
1.4558 + if (ui->mUserInput == NS_STYLE_USER_INPUT_NONE)
1.4559 + return false;
1.4560 + }
1.4561 +
1.4562 + if (aState == NS_EVENT_STATE_ACTIVE) {
1.4563 + if (aContent != mActiveContent) {
1.4564 + notifyContent1 = aContent;
1.4565 + notifyContent2 = mActiveContent;
1.4566 + mActiveContent = aContent;
1.4567 + }
1.4568 + } else {
1.4569 + NS_ASSERTION(aState == NS_EVENT_STATE_HOVER, "How did that happen?");
1.4570 + nsIContent* newHover;
1.4571 +
1.4572 + if (mPresContext->IsDynamic()) {
1.4573 + newHover = aContent;
1.4574 + } else {
1.4575 + NS_ASSERTION(!aContent ||
1.4576 + aContent->GetCurrentDoc() == mPresContext->PresShell()->GetDocument(),
1.4577 + "Unexpected document");
1.4578 + nsIFrame *frame = aContent ? aContent->GetPrimaryFrame() : nullptr;
1.4579 + if (frame && nsLayoutUtils::IsViewportScrollbarFrame(frame)) {
1.4580 + // The scrollbars of viewport should not ignore the hover state.
1.4581 + // Because they are *not* the content of the web page.
1.4582 + newHover = aContent;
1.4583 + } else {
1.4584 + // All contents of the web page should ignore the hover state.
1.4585 + newHover = nullptr;
1.4586 + }
1.4587 + }
1.4588 +
1.4589 + if (newHover != mHoverContent) {
1.4590 + notifyContent1 = newHover;
1.4591 + notifyContent2 = mHoverContent;
1.4592 + mHoverContent = newHover;
1.4593 + }
1.4594 + }
1.4595 + } else {
1.4596 + updateAncestors = false;
1.4597 + if (aState == NS_EVENT_STATE_DRAGOVER) {
1.4598 + if (aContent != sDragOverContent) {
1.4599 + notifyContent1 = aContent;
1.4600 + notifyContent2 = sDragOverContent;
1.4601 + sDragOverContent = aContent;
1.4602 + }
1.4603 + } else if (aState == NS_EVENT_STATE_URLTARGET) {
1.4604 + if (aContent != mURLTargetContent) {
1.4605 + notifyContent1 = aContent;
1.4606 + notifyContent2 = mURLTargetContent;
1.4607 + mURLTargetContent = aContent;
1.4608 + }
1.4609 + }
1.4610 + }
1.4611 +
1.4612 + // We need to keep track of which of notifyContent1 and notifyContent2 is
1.4613 + // getting the state set and which is getting it unset. If both are
1.4614 + // non-null, then notifyContent1 is having the state set and notifyContent2
1.4615 + // is having it unset. But if one of them is null, we need to keep track of
1.4616 + // the right thing for notifyContent1 explicitly.
1.4617 + bool content1StateSet = true;
1.4618 + if (!notifyContent1) {
1.4619 + // This is ok because FindCommonAncestor wouldn't find anything
1.4620 + // anyway if notifyContent1 is null.
1.4621 + notifyContent1 = notifyContent2;
1.4622 + notifyContent2 = nullptr;
1.4623 + content1StateSet = false;
1.4624 + }
1.4625 +
1.4626 + if (notifyContent1 && mPresContext) {
1.4627 + EnsureDocument(mPresContext);
1.4628 + if (mDocument) {
1.4629 + nsAutoScriptBlocker scriptBlocker;
1.4630 +
1.4631 + if (updateAncestors) {
1.4632 + nsCOMPtr<nsIContent> commonAncestor =
1.4633 + FindCommonAncestor(notifyContent1, notifyContent2);
1.4634 + if (notifyContent2) {
1.4635 + // It's very important to first notify the state removal and
1.4636 + // then the state addition, because due to labels it's
1.4637 + // possible that we're removing state from some element but
1.4638 + // then adding it again (say because mHoverContent changed
1.4639 + // from a control to its label).
1.4640 + UpdateAncestorState(notifyContent2, commonAncestor, aState, false);
1.4641 + }
1.4642 + UpdateAncestorState(notifyContent1, commonAncestor, aState,
1.4643 + content1StateSet);
1.4644 + } else {
1.4645 + if (notifyContent2) {
1.4646 + DoStateChange(notifyContent2, aState, false);
1.4647 + }
1.4648 + DoStateChange(notifyContent1, aState, content1StateSet);
1.4649 + }
1.4650 + }
1.4651 + }
1.4652 +
1.4653 + return true;
1.4654 +}
1.4655 +
1.4656 +PLDHashOperator
1.4657 +EventStateManager::ResetLastOverForContent(
1.4658 + const uint32_t& aIdx,
1.4659 + nsRefPtr<OverOutElementsWrapper>& aElemWrapper,
1.4660 + void* aClosure)
1.4661 +{
1.4662 + nsIContent* content = static_cast<nsIContent*>(aClosure);
1.4663 + if (aElemWrapper && aElemWrapper->mLastOverElement &&
1.4664 + nsContentUtils::ContentIsDescendantOf(aElemWrapper->mLastOverElement, content)) {
1.4665 + aElemWrapper->mLastOverElement = nullptr;
1.4666 + }
1.4667 +
1.4668 + return PL_DHASH_NEXT;
1.4669 +}
1.4670 +
1.4671 +void
1.4672 +EventStateManager::ContentRemoved(nsIDocument* aDocument, nsIContent* aContent)
1.4673 +{
1.4674 + /*
1.4675 + * Anchor and area elements when focused or hovered might make the UI to show
1.4676 + * the current link. We want to make sure that the UI gets informed when they
1.4677 + * are actually removed from the DOM.
1.4678 + */
1.4679 + if (aContent->IsHTML() &&
1.4680 + (aContent->Tag() == nsGkAtoms::a || aContent->Tag() == nsGkAtoms::area) &&
1.4681 + (aContent->AsElement()->State().HasAtLeastOneOfStates(NS_EVENT_STATE_FOCUS |
1.4682 + NS_EVENT_STATE_HOVER))) {
1.4683 + nsGenericHTMLElement* element = static_cast<nsGenericHTMLElement*>(aContent);
1.4684 + element->LeaveLink(element->GetPresContext());
1.4685 + }
1.4686 +
1.4687 + IMEStateManager::OnRemoveContent(mPresContext, aContent);
1.4688 +
1.4689 + // inform the focus manager that the content is being removed. If this
1.4690 + // content is focused, the focus will be removed without firing events.
1.4691 + nsFocusManager* fm = nsFocusManager::GetFocusManager();
1.4692 + if (fm)
1.4693 + fm->ContentRemoved(aDocument, aContent);
1.4694 +
1.4695 + if (mHoverContent &&
1.4696 + nsContentUtils::ContentIsDescendantOf(mHoverContent, aContent)) {
1.4697 + // Since hover is hierarchical, set the current hover to the
1.4698 + // content's parent node.
1.4699 + SetContentState(aContent->GetParent(), NS_EVENT_STATE_HOVER);
1.4700 + }
1.4701 +
1.4702 + if (mActiveContent &&
1.4703 + nsContentUtils::ContentIsDescendantOf(mActiveContent, aContent)) {
1.4704 + // Active is hierarchical, so set the current active to the
1.4705 + // content's parent node.
1.4706 + SetContentState(aContent->GetParent(), NS_EVENT_STATE_ACTIVE);
1.4707 + }
1.4708 +
1.4709 + if (sDragOverContent &&
1.4710 + sDragOverContent->OwnerDoc() == aContent->OwnerDoc() &&
1.4711 + nsContentUtils::ContentIsDescendantOf(sDragOverContent, aContent)) {
1.4712 + sDragOverContent = nullptr;
1.4713 + }
1.4714 +
1.4715 + // See bug 292146 for why we want to null this out
1.4716 + ResetLastOverForContent(0, mMouseEnterLeaveHelper, aContent);
1.4717 + mPointersEnterLeaveHelper.Enumerate(
1.4718 + &EventStateManager::ResetLastOverForContent, aContent);
1.4719 +}
1.4720 +
1.4721 +bool
1.4722 +EventStateManager::EventStatusOK(WidgetGUIEvent* aEvent)
1.4723 +{
1.4724 + return !(aEvent->message == NS_MOUSE_BUTTON_DOWN &&
1.4725 + aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton &&
1.4726 + !sNormalLMouseEventInProcess);
1.4727 +}
1.4728 +
1.4729 +//-------------------------------------------
1.4730 +// Access Key Registration
1.4731 +//-------------------------------------------
1.4732 +void
1.4733 +EventStateManager::RegisterAccessKey(nsIContent* aContent, uint32_t aKey)
1.4734 +{
1.4735 + if (aContent && mAccessKeys.IndexOf(aContent) == -1)
1.4736 + mAccessKeys.AppendObject(aContent);
1.4737 +}
1.4738 +
1.4739 +void
1.4740 +EventStateManager::UnregisterAccessKey(nsIContent* aContent, uint32_t aKey)
1.4741 +{
1.4742 + if (aContent)
1.4743 + mAccessKeys.RemoveObject(aContent);
1.4744 +}
1.4745 +
1.4746 +uint32_t
1.4747 +EventStateManager::GetRegisteredAccessKey(nsIContent* aContent)
1.4748 +{
1.4749 + MOZ_ASSERT(aContent);
1.4750 +
1.4751 + if (mAccessKeys.IndexOf(aContent) == -1)
1.4752 + return 0;
1.4753 +
1.4754 + nsAutoString accessKey;
1.4755 + aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey);
1.4756 + return accessKey.First();
1.4757 +}
1.4758 +
1.4759 +void
1.4760 +EventStateManager::EnsureDocument(nsPresContext* aPresContext)
1.4761 +{
1.4762 + if (!mDocument)
1.4763 + mDocument = aPresContext->Document();
1.4764 +}
1.4765 +
1.4766 +void
1.4767 +EventStateManager::FlushPendingEvents(nsPresContext* aPresContext)
1.4768 +{
1.4769 + NS_PRECONDITION(nullptr != aPresContext, "nullptr ptr");
1.4770 + nsIPresShell *shell = aPresContext->GetPresShell();
1.4771 + if (shell) {
1.4772 + shell->FlushPendingNotifications(Flush_InterruptibleLayout);
1.4773 + }
1.4774 +}
1.4775 +
1.4776 +nsIContent*
1.4777 +EventStateManager::GetFocusedContent()
1.4778 +{
1.4779 + nsIFocusManager* fm = nsFocusManager::GetFocusManager();
1.4780 + if (!fm || !mDocument)
1.4781 + return nullptr;
1.4782 +
1.4783 + nsCOMPtr<nsPIDOMWindow> focusedWindow;
1.4784 + return nsFocusManager::GetFocusedDescendant(mDocument->GetWindow(), false,
1.4785 + getter_AddRefs(focusedWindow));
1.4786 +}
1.4787 +
1.4788 +//-------------------------------------------------------
1.4789 +// Return true if the docshell is visible
1.4790 +
1.4791 +bool
1.4792 +EventStateManager::IsShellVisible(nsIDocShell* aShell)
1.4793 +{
1.4794 + NS_ASSERTION(aShell, "docshell is null");
1.4795 +
1.4796 + nsCOMPtr<nsIBaseWindow> basewin = do_QueryInterface(aShell);
1.4797 + if (!basewin)
1.4798 + return true;
1.4799 +
1.4800 + bool isVisible = true;
1.4801 + basewin->GetVisibility(&isVisible);
1.4802 +
1.4803 + // We should be doing some additional checks here so that
1.4804 + // we don't tab into hidden tabs of tabbrowser. -bryner
1.4805 +
1.4806 + return isVisible;
1.4807 +}
1.4808 +
1.4809 +nsresult
1.4810 +EventStateManager::DoContentCommandEvent(WidgetContentCommandEvent* aEvent)
1.4811 +{
1.4812 + EnsureDocument(mPresContext);
1.4813 + NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);
1.4814 + nsCOMPtr<nsPIDOMWindow> window(mDocument->GetWindow());
1.4815 + NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
1.4816 +
1.4817 + nsCOMPtr<nsPIWindowRoot> root = window->GetTopWindowRoot();
1.4818 + NS_ENSURE_TRUE(root, NS_ERROR_FAILURE);
1.4819 + const char* cmd;
1.4820 + switch (aEvent->message) {
1.4821 + case NS_CONTENT_COMMAND_CUT:
1.4822 + cmd = "cmd_cut";
1.4823 + break;
1.4824 + case NS_CONTENT_COMMAND_COPY:
1.4825 + cmd = "cmd_copy";
1.4826 + break;
1.4827 + case NS_CONTENT_COMMAND_PASTE:
1.4828 + cmd = "cmd_paste";
1.4829 + break;
1.4830 + case NS_CONTENT_COMMAND_DELETE:
1.4831 + cmd = "cmd_delete";
1.4832 + break;
1.4833 + case NS_CONTENT_COMMAND_UNDO:
1.4834 + cmd = "cmd_undo";
1.4835 + break;
1.4836 + case NS_CONTENT_COMMAND_REDO:
1.4837 + cmd = "cmd_redo";
1.4838 + break;
1.4839 + case NS_CONTENT_COMMAND_PASTE_TRANSFERABLE:
1.4840 + cmd = "cmd_pasteTransferable";
1.4841 + break;
1.4842 + default:
1.4843 + return NS_ERROR_NOT_IMPLEMENTED;
1.4844 + }
1.4845 + nsCOMPtr<nsIController> controller;
1.4846 + nsresult rv = root->GetControllerForCommand(cmd, getter_AddRefs(controller));
1.4847 + NS_ENSURE_SUCCESS(rv, rv);
1.4848 + if (!controller) {
1.4849 + // When GetControllerForCommand succeeded but there is no controller, the
1.4850 + // command isn't supported.
1.4851 + aEvent->mIsEnabled = false;
1.4852 + } else {
1.4853 + bool canDoIt;
1.4854 + rv = controller->IsCommandEnabled(cmd, &canDoIt);
1.4855 + NS_ENSURE_SUCCESS(rv, rv);
1.4856 + aEvent->mIsEnabled = canDoIt;
1.4857 + if (canDoIt && !aEvent->mOnlyEnabledCheck) {
1.4858 + switch (aEvent->message) {
1.4859 + case NS_CONTENT_COMMAND_PASTE_TRANSFERABLE: {
1.4860 + nsCOMPtr<nsICommandController> commandController = do_QueryInterface(controller);
1.4861 + NS_ENSURE_STATE(commandController);
1.4862 +
1.4863 + nsCOMPtr<nsICommandParams> params = do_CreateInstance("@mozilla.org/embedcomp/command-params;1", &rv);
1.4864 + NS_ENSURE_SUCCESS(rv, rv);
1.4865 +
1.4866 + rv = params->SetISupportsValue("transferable", aEvent->mTransferable);
1.4867 + NS_ENSURE_SUCCESS(rv, rv);
1.4868 +
1.4869 + rv = commandController->DoCommandWithParams(cmd, params);
1.4870 + break;
1.4871 + }
1.4872 +
1.4873 + default:
1.4874 + rv = controller->DoCommand(cmd);
1.4875 + break;
1.4876 + }
1.4877 + NS_ENSURE_SUCCESS(rv, rv);
1.4878 + }
1.4879 + }
1.4880 + aEvent->mSucceeded = true;
1.4881 + return NS_OK;
1.4882 +}
1.4883 +
1.4884 +nsresult
1.4885 +EventStateManager::DoContentCommandScrollEvent(
1.4886 + WidgetContentCommandEvent* aEvent)
1.4887 +{
1.4888 + NS_ENSURE_TRUE(mPresContext, NS_ERROR_NOT_AVAILABLE);
1.4889 + nsIPresShell* ps = mPresContext->GetPresShell();
1.4890 + NS_ENSURE_TRUE(ps, NS_ERROR_NOT_AVAILABLE);
1.4891 + NS_ENSURE_TRUE(aEvent->mScroll.mAmount != 0, NS_ERROR_INVALID_ARG);
1.4892 +
1.4893 + nsIScrollableFrame::ScrollUnit scrollUnit;
1.4894 + switch (aEvent->mScroll.mUnit) {
1.4895 + case WidgetContentCommandEvent::eCmdScrollUnit_Line:
1.4896 + scrollUnit = nsIScrollableFrame::LINES;
1.4897 + break;
1.4898 + case WidgetContentCommandEvent::eCmdScrollUnit_Page:
1.4899 + scrollUnit = nsIScrollableFrame::PAGES;
1.4900 + break;
1.4901 + case WidgetContentCommandEvent::eCmdScrollUnit_Whole:
1.4902 + scrollUnit = nsIScrollableFrame::WHOLE;
1.4903 + break;
1.4904 + default:
1.4905 + return NS_ERROR_INVALID_ARG;
1.4906 + }
1.4907 +
1.4908 + aEvent->mSucceeded = true;
1.4909 +
1.4910 + nsIScrollableFrame* sf =
1.4911 + ps->GetFrameToScrollAsScrollable(nsIPresShell::eEither);
1.4912 + aEvent->mIsEnabled = sf ?
1.4913 + (aEvent->mScroll.mIsHorizontal ?
1.4914 + WheelHandlingUtils::CanScrollOn(sf, aEvent->mScroll.mAmount, 0) :
1.4915 + WheelHandlingUtils::CanScrollOn(sf, 0, aEvent->mScroll.mAmount)) : false;
1.4916 +
1.4917 + if (!aEvent->mIsEnabled || aEvent->mOnlyEnabledCheck) {
1.4918 + return NS_OK;
1.4919 + }
1.4920 +
1.4921 + nsIntPoint pt(0, 0);
1.4922 + if (aEvent->mScroll.mIsHorizontal) {
1.4923 + pt.x = aEvent->mScroll.mAmount;
1.4924 + } else {
1.4925 + pt.y = aEvent->mScroll.mAmount;
1.4926 + }
1.4927 +
1.4928 + // The caller may want synchronous scrolling.
1.4929 + sf->ScrollBy(pt, scrollUnit, nsIScrollableFrame::INSTANT);
1.4930 + return NS_OK;
1.4931 +}
1.4932 +
1.4933 +void
1.4934 +EventStateManager::DoQuerySelectedText(WidgetQueryContentEvent* aEvent)
1.4935 +{
1.4936 + if (RemoteQueryContentEvent(aEvent)) {
1.4937 + return;
1.4938 + }
1.4939 + ContentEventHandler handler(mPresContext);
1.4940 + handler.OnQuerySelectedText(aEvent);
1.4941 +}
1.4942 +
1.4943 +void
1.4944 +EventStateManager::SetActiveManager(EventStateManager* aNewESM,
1.4945 + nsIContent* aContent)
1.4946 +{
1.4947 + if (sActiveESM && aNewESM != sActiveESM) {
1.4948 + sActiveESM->SetContentState(nullptr, NS_EVENT_STATE_ACTIVE);
1.4949 + }
1.4950 + sActiveESM = aNewESM;
1.4951 + if (sActiveESM && aContent) {
1.4952 + sActiveESM->SetContentState(aContent, NS_EVENT_STATE_ACTIVE);
1.4953 + }
1.4954 +}
1.4955 +
1.4956 +void
1.4957 +EventStateManager::ClearGlobalActiveContent(EventStateManager* aClearer)
1.4958 +{
1.4959 + if (aClearer) {
1.4960 + aClearer->SetContentState(nullptr, NS_EVENT_STATE_ACTIVE);
1.4961 + if (sDragOverContent) {
1.4962 + aClearer->SetContentState(nullptr, NS_EVENT_STATE_DRAGOVER);
1.4963 + }
1.4964 + }
1.4965 + if (sActiveESM && aClearer != sActiveESM) {
1.4966 + sActiveESM->SetContentState(nullptr, NS_EVENT_STATE_ACTIVE);
1.4967 + }
1.4968 + sActiveESM = nullptr;
1.4969 +}
1.4970 +
1.4971 +/******************************************************************/
1.4972 +/* mozilla::EventStateManager::DeltaAccumulator */
1.4973 +/******************************************************************/
1.4974 +
1.4975 +void
1.4976 +EventStateManager::DeltaAccumulator::InitLineOrPageDelta(
1.4977 + nsIFrame* aTargetFrame,
1.4978 + EventStateManager* aESM,
1.4979 + WidgetWheelEvent* aEvent)
1.4980 +{
1.4981 + MOZ_ASSERT(aESM);
1.4982 + MOZ_ASSERT(aEvent);
1.4983 +
1.4984 + // Reset if the previous wheel event is too old.
1.4985 + if (!mLastTime.IsNull()) {
1.4986 + TimeDuration duration = TimeStamp::Now() - mLastTime;
1.4987 + if (duration.ToMilliseconds() > WheelTransaction::GetTimeoutTime()) {
1.4988 + Reset();
1.4989 + }
1.4990 + }
1.4991 + // If we have accumulated delta, we may need to reset it.
1.4992 + if (IsInTransaction()) {
1.4993 + // If wheel event type is changed, reset the values.
1.4994 + if (mHandlingDeltaMode != aEvent->deltaMode ||
1.4995 + mHandlingPixelOnlyDevice != aEvent->isPixelOnlyDevice) {
1.4996 + Reset();
1.4997 + } else {
1.4998 + // If the delta direction is changed, we should reset only the
1.4999 + // accumulated values.
1.5000 + if (mX && aEvent->deltaX && ((aEvent->deltaX > 0.0) != (mX > 0.0))) {
1.5001 + mX = mPendingScrollAmountX = 0.0;
1.5002 + }
1.5003 + if (mY && aEvent->deltaY && ((aEvent->deltaY > 0.0) != (mY > 0.0))) {
1.5004 + mY = mPendingScrollAmountY = 0.0;
1.5005 + }
1.5006 + }
1.5007 + }
1.5008 +
1.5009 + mHandlingDeltaMode = aEvent->deltaMode;
1.5010 + mHandlingPixelOnlyDevice = aEvent->isPixelOnlyDevice;
1.5011 +
1.5012 + // If it's handling neither pixel scroll mode for pixel only device nor
1.5013 + // delta values multiplied by prefs, we must not modify lineOrPageDelta
1.5014 + // values.
1.5015 + if (!(mHandlingDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL &&
1.5016 + mHandlingPixelOnlyDevice) &&
1.5017 + !EventStateManager::WheelPrefs::GetInstance()->
1.5018 + NeedToComputeLineOrPageDelta(aEvent)) {
1.5019 + // Set the delta values to mX and mY. They would be used when above block
1.5020 + // resets mX/mY/mPendingScrollAmountX/mPendingScrollAmountY if the direction
1.5021 + // is changed.
1.5022 + // NOTE: We shouldn't accumulate the delta values, it might could cause
1.5023 + // overflow even though it's not a realistic situation.
1.5024 + if (aEvent->deltaX) {
1.5025 + mX = aEvent->deltaX;
1.5026 + }
1.5027 + if (aEvent->deltaY) {
1.5028 + mY = aEvent->deltaY;
1.5029 + }
1.5030 + mLastTime = TimeStamp::Now();
1.5031 + return;
1.5032 + }
1.5033 +
1.5034 + mX += aEvent->deltaX;
1.5035 + mY += aEvent->deltaY;
1.5036 +
1.5037 + if (mHandlingDeltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
1.5038 + // Records pixel delta values and init lineOrPageDeltaX and
1.5039 + // lineOrPageDeltaY for wheel events which are caused by pixel only
1.5040 + // devices. Ignore mouse wheel transaction for computing this. The
1.5041 + // lineOrPageDelta values will be used by dispatching legacy
1.5042 + // NS_MOUSE_SCROLL_EVENT (DOMMouseScroll) but not be used for scrolling
1.5043 + // of default action. The transaction should be used only for the default
1.5044 + // action.
1.5045 + nsIScrollableFrame* scrollTarget =
1.5046 + aESM->ComputeScrollTarget(aTargetFrame, aEvent,
1.5047 + COMPUTE_LEGACY_MOUSE_SCROLL_EVENT_TARGET);
1.5048 + nsIFrame* frame = do_QueryFrame(scrollTarget);
1.5049 + nsPresContext* pc =
1.5050 + frame ? frame->PresContext() : aTargetFrame->PresContext();
1.5051 + nsSize scrollAmount = aESM->GetScrollAmount(pc, aEvent, scrollTarget);
1.5052 + nsIntSize scrollAmountInCSSPixels(
1.5053 + nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.width),
1.5054 + nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.height));
1.5055 +
1.5056 + aEvent->lineOrPageDeltaX = RoundDown(mX) / scrollAmountInCSSPixels.width;
1.5057 + aEvent->lineOrPageDeltaY = RoundDown(mY) / scrollAmountInCSSPixels.height;
1.5058 +
1.5059 + mX -= aEvent->lineOrPageDeltaX * scrollAmountInCSSPixels.width;
1.5060 + mY -= aEvent->lineOrPageDeltaY * scrollAmountInCSSPixels.height;
1.5061 + } else {
1.5062 + aEvent->lineOrPageDeltaX = RoundDown(mX);
1.5063 + aEvent->lineOrPageDeltaY = RoundDown(mY);
1.5064 + mX -= aEvent->lineOrPageDeltaX;
1.5065 + mY -= aEvent->lineOrPageDeltaY;
1.5066 + }
1.5067 +
1.5068 + mLastTime = TimeStamp::Now();
1.5069 +}
1.5070 +
1.5071 +void
1.5072 +EventStateManager::DeltaAccumulator::Reset()
1.5073 +{
1.5074 + mX = mY = 0.0;
1.5075 + mPendingScrollAmountX = mPendingScrollAmountY = 0.0;
1.5076 + mHandlingDeltaMode = UINT32_MAX;
1.5077 + mHandlingPixelOnlyDevice = false;
1.5078 +}
1.5079 +
1.5080 +nsIntPoint
1.5081 +EventStateManager::DeltaAccumulator::ComputeScrollAmountForDefaultAction(
1.5082 + WidgetWheelEvent* aEvent,
1.5083 + const nsIntSize& aScrollAmountInDevPixels)
1.5084 +{
1.5085 + MOZ_ASSERT(aEvent);
1.5086 +
1.5087 + // If the wheel event is line scroll and the delta value is computed from
1.5088 + // system settings, allow to override the system speed.
1.5089 + bool allowScrollSpeedOverride =
1.5090 + (!aEvent->customizedByUserPrefs &&
1.5091 + aEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_LINE);
1.5092 + DeltaValues acceleratedDelta =
1.5093 + WheelTransaction::AccelerateWheelDelta(aEvent, allowScrollSpeedOverride);
1.5094 +
1.5095 + nsIntPoint result(0, 0);
1.5096 + if (aEvent->deltaMode == nsIDOMWheelEvent::DOM_DELTA_PIXEL) {
1.5097 + mPendingScrollAmountX += acceleratedDelta.deltaX;
1.5098 + mPendingScrollAmountY += acceleratedDelta.deltaY;
1.5099 + } else {
1.5100 + mPendingScrollAmountX +=
1.5101 + aScrollAmountInDevPixels.width * acceleratedDelta.deltaX;
1.5102 + mPendingScrollAmountY +=
1.5103 + aScrollAmountInDevPixels.height * acceleratedDelta.deltaY;
1.5104 + }
1.5105 + result.x = RoundDown(mPendingScrollAmountX);
1.5106 + result.y = RoundDown(mPendingScrollAmountY);
1.5107 + mPendingScrollAmountX -= result.x;
1.5108 + mPendingScrollAmountY -= result.y;
1.5109 +
1.5110 + return result;
1.5111 +}
1.5112 +
1.5113 +/******************************************************************/
1.5114 +/* mozilla::EventStateManager::WheelPrefs */
1.5115 +/******************************************************************/
1.5116 +
1.5117 +// static
1.5118 +EventStateManager::WheelPrefs*
1.5119 +EventStateManager::WheelPrefs::GetInstance()
1.5120 +{
1.5121 + if (!sInstance) {
1.5122 + sInstance = new WheelPrefs();
1.5123 + }
1.5124 + return sInstance;
1.5125 +}
1.5126 +
1.5127 +// static
1.5128 +void
1.5129 +EventStateManager::WheelPrefs::Shutdown()
1.5130 +{
1.5131 + delete sInstance;
1.5132 + sInstance = nullptr;
1.5133 +}
1.5134 +
1.5135 +// static
1.5136 +void
1.5137 +EventStateManager::WheelPrefs::OnPrefChanged(const char* aPrefName,
1.5138 + void* aClosure)
1.5139 +{
1.5140 + // forget all prefs, it's not problem for performance.
1.5141 + sInstance->Reset();
1.5142 + DeltaAccumulator::GetInstance()->Reset();
1.5143 +}
1.5144 +
1.5145 +EventStateManager::WheelPrefs::WheelPrefs()
1.5146 +{
1.5147 + Reset();
1.5148 + Preferences::RegisterCallback(OnPrefChanged, "mousewheel.", nullptr);
1.5149 +}
1.5150 +
1.5151 +EventStateManager::WheelPrefs::~WheelPrefs()
1.5152 +{
1.5153 + Preferences::UnregisterCallback(OnPrefChanged, "mousewheel.", nullptr);
1.5154 +}
1.5155 +
1.5156 +void
1.5157 +EventStateManager::WheelPrefs::Reset()
1.5158 +{
1.5159 + memset(mInit, 0, sizeof(mInit));
1.5160 +
1.5161 +}
1.5162 +
1.5163 +EventStateManager::WheelPrefs::Index
1.5164 +EventStateManager::WheelPrefs::GetIndexFor(WidgetWheelEvent* aEvent)
1.5165 +{
1.5166 + if (!aEvent) {
1.5167 + return INDEX_DEFAULT;
1.5168 + }
1.5169 +
1.5170 + Modifiers modifiers =
1.5171 + (aEvent->modifiers & (MODIFIER_ALT |
1.5172 + MODIFIER_CONTROL |
1.5173 + MODIFIER_META |
1.5174 + MODIFIER_SHIFT |
1.5175 + MODIFIER_OS));
1.5176 +
1.5177 + switch (modifiers) {
1.5178 + case MODIFIER_ALT:
1.5179 + return INDEX_ALT;
1.5180 + case MODIFIER_CONTROL:
1.5181 + return INDEX_CONTROL;
1.5182 + case MODIFIER_META:
1.5183 + return INDEX_META;
1.5184 + case MODIFIER_SHIFT:
1.5185 + return INDEX_SHIFT;
1.5186 + case MODIFIER_OS:
1.5187 + return INDEX_OS;
1.5188 + default:
1.5189 + // If two or more modifier keys are pressed, we should use default
1.5190 + // settings.
1.5191 + return INDEX_DEFAULT;
1.5192 + }
1.5193 +}
1.5194 +
1.5195 +void
1.5196 +EventStateManager::WheelPrefs::GetBasePrefName(
1.5197 + EventStateManager::WheelPrefs::Index aIndex,
1.5198 + nsACString& aBasePrefName)
1.5199 +{
1.5200 + aBasePrefName.AssignLiteral("mousewheel.");
1.5201 + switch (aIndex) {
1.5202 + case INDEX_ALT:
1.5203 + aBasePrefName.AppendLiteral("with_alt.");
1.5204 + break;
1.5205 + case INDEX_CONTROL:
1.5206 + aBasePrefName.AppendLiteral("with_control.");
1.5207 + break;
1.5208 + case INDEX_META:
1.5209 + aBasePrefName.AppendLiteral("with_meta.");
1.5210 + break;
1.5211 + case INDEX_SHIFT:
1.5212 + aBasePrefName.AppendLiteral("with_shift.");
1.5213 + break;
1.5214 + case INDEX_OS:
1.5215 + aBasePrefName.AppendLiteral("with_win.");
1.5216 + break;
1.5217 + case INDEX_DEFAULT:
1.5218 + default:
1.5219 + aBasePrefName.AppendLiteral("default.");
1.5220 + break;
1.5221 + }
1.5222 +}
1.5223 +
1.5224 +void
1.5225 +EventStateManager::WheelPrefs::Init(EventStateManager::WheelPrefs::Index aIndex)
1.5226 +{
1.5227 + if (mInit[aIndex]) {
1.5228 + return;
1.5229 + }
1.5230 + mInit[aIndex] = true;
1.5231 +
1.5232 + nsAutoCString basePrefName;
1.5233 + GetBasePrefName(aIndex, basePrefName);
1.5234 +
1.5235 + nsAutoCString prefNameX(basePrefName);
1.5236 + prefNameX.AppendLiteral("delta_multiplier_x");
1.5237 + mMultiplierX[aIndex] =
1.5238 + static_cast<double>(Preferences::GetInt(prefNameX.get(), 100)) / 100;
1.5239 +
1.5240 + nsAutoCString prefNameY(basePrefName);
1.5241 + prefNameY.AppendLiteral("delta_multiplier_y");
1.5242 + mMultiplierY[aIndex] =
1.5243 + static_cast<double>(Preferences::GetInt(prefNameY.get(), 100)) / 100;
1.5244 +
1.5245 + nsAutoCString prefNameZ(basePrefName);
1.5246 + prefNameZ.AppendLiteral("delta_multiplier_z");
1.5247 + mMultiplierZ[aIndex] =
1.5248 + static_cast<double>(Preferences::GetInt(prefNameZ.get(), 100)) / 100;
1.5249 +
1.5250 + nsAutoCString prefNameAction(basePrefName);
1.5251 + prefNameAction.AppendLiteral("action");
1.5252 + int32_t action = Preferences::GetInt(prefNameAction.get(), ACTION_SCROLL);
1.5253 + if (action < int32_t(ACTION_NONE) || action > int32_t(ACTION_LAST)) {
1.5254 + NS_WARNING("Unsupported action pref value, replaced with 'Scroll'.");
1.5255 + action = ACTION_SCROLL;
1.5256 + }
1.5257 + mActions[aIndex] = static_cast<Action>(action);
1.5258 +
1.5259 + // Compute action values overridden by .override_x pref.
1.5260 + // At present, override is possible only for the x-direction
1.5261 + // because this pref is introduced mainly for tilt wheels.
1.5262 + prefNameAction.AppendLiteral(".override_x");
1.5263 + int32_t actionOverrideX = Preferences::GetInt(prefNameAction.get(), -1);
1.5264 + if (actionOverrideX < -1 || actionOverrideX > int32_t(ACTION_LAST)) {
1.5265 + NS_WARNING("Unsupported action override pref value, didn't override.");
1.5266 + actionOverrideX = -1;
1.5267 + }
1.5268 + mOverriddenActionsX[aIndex] = (actionOverrideX == -1)
1.5269 + ? static_cast<Action>(action)
1.5270 + : static_cast<Action>(actionOverrideX);
1.5271 +}
1.5272 +
1.5273 +void
1.5274 +EventStateManager::WheelPrefs::ApplyUserPrefsToDelta(WidgetWheelEvent* aEvent)
1.5275 +{
1.5276 + Index index = GetIndexFor(aEvent);
1.5277 + Init(index);
1.5278 +
1.5279 + aEvent->deltaX *= mMultiplierX[index];
1.5280 + aEvent->deltaY *= mMultiplierY[index];
1.5281 + aEvent->deltaZ *= mMultiplierZ[index];
1.5282 +
1.5283 + // If the multiplier is 1.0 or -1.0, i.e., it doesn't change the absolute
1.5284 + // value, we should use lineOrPageDelta values which were set by widget.
1.5285 + // Otherwise, we need to compute them from accumulated delta values.
1.5286 + if (!NeedToComputeLineOrPageDelta(aEvent)) {
1.5287 + aEvent->lineOrPageDeltaX *= static_cast<int32_t>(mMultiplierX[index]);
1.5288 + aEvent->lineOrPageDeltaY *= static_cast<int32_t>(mMultiplierY[index]);
1.5289 + } else {
1.5290 + aEvent->lineOrPageDeltaX = 0;
1.5291 + aEvent->lineOrPageDeltaY = 0;
1.5292 + }
1.5293 +
1.5294 + aEvent->customizedByUserPrefs =
1.5295 + ((mMultiplierX[index] != 1.0) || (mMultiplierY[index] != 1.0) ||
1.5296 + (mMultiplierZ[index] != 1.0));
1.5297 +}
1.5298 +
1.5299 +void
1.5300 +EventStateManager::WheelPrefs::CancelApplyingUserPrefsFromOverflowDelta(
1.5301 + WidgetWheelEvent* aEvent)
1.5302 +{
1.5303 + Index index = GetIndexFor(aEvent);
1.5304 + Init(index);
1.5305 +
1.5306 + // XXX If the multiplier pref value is negative, the scroll direction was
1.5307 + // changed and caused to scroll different direction. In such case,
1.5308 + // this method reverts the sign of overflowDelta. Does it make widget
1.5309 + // happy? Although, widget can know the pref applied delta values by
1.5310 + // referrencing the deltaX and deltaY of the event.
1.5311 +
1.5312 + if (mMultiplierX[index]) {
1.5313 + aEvent->overflowDeltaX /= mMultiplierX[index];
1.5314 + }
1.5315 + if (mMultiplierY[index]) {
1.5316 + aEvent->overflowDeltaY /= mMultiplierY[index];
1.5317 + }
1.5318 +}
1.5319 +
1.5320 +EventStateManager::WheelPrefs::Action
1.5321 +EventStateManager::WheelPrefs::ComputeActionFor(WidgetWheelEvent* aEvent)
1.5322 +{
1.5323 + Index index = GetIndexFor(aEvent);
1.5324 + Init(index);
1.5325 +
1.5326 + bool deltaXPreferred =
1.5327 + (Abs(aEvent->deltaX) > Abs(aEvent->deltaY) &&
1.5328 + Abs(aEvent->deltaX) > Abs(aEvent->deltaZ));
1.5329 + Action* actions = deltaXPreferred ? mOverriddenActionsX : mActions;
1.5330 + if (actions[index] == ACTION_NONE || actions[index] == ACTION_SCROLL) {
1.5331 + return actions[index];
1.5332 + }
1.5333 +
1.5334 + // Momentum events shouldn't run special actions.
1.5335 + if (aEvent->isMomentum) {
1.5336 + // Use the default action. Note that user might kill the wheel scrolling.
1.5337 + Init(INDEX_DEFAULT);
1.5338 + return (actions[INDEX_DEFAULT] == ACTION_SCROLL) ? ACTION_SCROLL :
1.5339 + ACTION_NONE;
1.5340 + }
1.5341 +
1.5342 + return actions[index];
1.5343 +}
1.5344 +
1.5345 +bool
1.5346 +EventStateManager::WheelPrefs::NeedToComputeLineOrPageDelta(
1.5347 + WidgetWheelEvent* aEvent)
1.5348 +{
1.5349 + Index index = GetIndexFor(aEvent);
1.5350 + Init(index);
1.5351 +
1.5352 + return (mMultiplierX[index] != 1.0 && mMultiplierX[index] != -1.0) ||
1.5353 + (mMultiplierY[index] != 1.0 && mMultiplierY[index] != -1.0);
1.5354 +}
1.5355 +
1.5356 +bool
1.5357 +EventStateManager::WheelPrefs::IsOverOnePageScrollAllowedX(
1.5358 + WidgetWheelEvent* aEvent)
1.5359 +{
1.5360 + Index index = GetIndexFor(aEvent);
1.5361 + Init(index);
1.5362 + return Abs(mMultiplierX[index]) >=
1.5363 + MIN_MULTIPLIER_VALUE_ALLOWING_OVER_ONE_PAGE_SCROLL;
1.5364 +}
1.5365 +
1.5366 +bool
1.5367 +EventStateManager::WheelPrefs::IsOverOnePageScrollAllowedY(
1.5368 + WidgetWheelEvent* aEvent)
1.5369 +{
1.5370 + Index index = GetIndexFor(aEvent);
1.5371 + Init(index);
1.5372 + return Abs(mMultiplierY[index]) >=
1.5373 + MIN_MULTIPLIER_VALUE_ALLOWING_OVER_ONE_PAGE_SCROLL;
1.5374 +}
1.5375 +
1.5376 +/******************************************************************/
1.5377 +/* mozilla::EventStateManager::Prefs */
1.5378 +/******************************************************************/
1.5379 +
1.5380 +bool EventStateManager::Prefs::sKeyCausesActivation = true;
1.5381 +bool EventStateManager::Prefs::sClickHoldContextMenu = false;
1.5382 +int32_t EventStateManager::Prefs::sGenericAccessModifierKey = -1;
1.5383 +int32_t EventStateManager::Prefs::sChromeAccessModifierMask = 0;
1.5384 +int32_t EventStateManager::Prefs::sContentAccessModifierMask = 0;
1.5385 +
1.5386 +// static
1.5387 +void
1.5388 +EventStateManager::Prefs::Init()
1.5389 +{
1.5390 + DebugOnly<nsresult> rv =
1.5391 + Preferences::AddBoolVarCache(&sKeyCausesActivation,
1.5392 + "accessibility.accesskeycausesactivation",
1.5393 + sKeyCausesActivation);
1.5394 + MOZ_ASSERT(NS_SUCCEEDED(rv),
1.5395 + "Failed to observe \"accessibility.accesskeycausesactivation\"");
1.5396 + rv = Preferences::AddBoolVarCache(&sClickHoldContextMenu,
1.5397 + "ui.click_hold_context_menus",
1.5398 + sClickHoldContextMenu);
1.5399 + MOZ_ASSERT(NS_SUCCEEDED(rv),
1.5400 + "Failed to observe \"ui.click_hold_context_menus\"");
1.5401 + rv = Preferences::AddIntVarCache(&sGenericAccessModifierKey,
1.5402 + "ui.key.generalAccessKey",
1.5403 + sGenericAccessModifierKey);
1.5404 + MOZ_ASSERT(NS_SUCCEEDED(rv),
1.5405 + "Failed to observe \"ui.key.generalAccessKey\"");
1.5406 + rv = Preferences::AddIntVarCache(&sChromeAccessModifierMask,
1.5407 + "ui.key.chromeAccess",
1.5408 + sChromeAccessModifierMask);
1.5409 + MOZ_ASSERT(NS_SUCCEEDED(rv),
1.5410 + "Failed to observe \"ui.key.chromeAccess\"");
1.5411 + rv = Preferences::AddIntVarCache(&sContentAccessModifierMask,
1.5412 + "ui.key.contentAccess",
1.5413 + sContentAccessModifierMask);
1.5414 + MOZ_ASSERT(NS_SUCCEEDED(rv),
1.5415 + "Failed to observe \"ui.key.contentAccess\"");
1.5416 +
1.5417 + rv = Preferences::RegisterCallback(OnChange, "dom.popup_allowed_events");
1.5418 + MOZ_ASSERT(NS_SUCCEEDED(rv),
1.5419 + "Failed to observe \"dom.popup_allowed_events\"");
1.5420 +}
1.5421 +
1.5422 +// static
1.5423 +void
1.5424 +EventStateManager::Prefs::OnChange(const char* aPrefName, void*)
1.5425 +{
1.5426 + nsDependentCString prefName(aPrefName);
1.5427 + if (prefName.EqualsLiteral("dom.popup_allowed_events")) {
1.5428 + Event::PopupAllowedEventsChanged();
1.5429 + }
1.5430 +}
1.5431 +
1.5432 +// static
1.5433 +void
1.5434 +EventStateManager::Prefs::Shutdown()
1.5435 +{
1.5436 + Preferences::UnregisterCallback(OnChange, "dom.popup_allowed_events");
1.5437 +}
1.5438 +
1.5439 +// static
1.5440 +int32_t
1.5441 +EventStateManager::Prefs::ChromeAccessModifierMask()
1.5442 +{
1.5443 + return GetAccessModifierMask(nsIDocShellTreeItem::typeChrome);
1.5444 +}
1.5445 +
1.5446 +// static
1.5447 +int32_t
1.5448 +EventStateManager::Prefs::ContentAccessModifierMask()
1.5449 +{
1.5450 + return GetAccessModifierMask(nsIDocShellTreeItem::typeContent);
1.5451 +}
1.5452 +
1.5453 +// static
1.5454 +int32_t
1.5455 +EventStateManager::Prefs::GetAccessModifierMask(int32_t aItemType)
1.5456 +{
1.5457 + switch (sGenericAccessModifierKey) {
1.5458 + case -1: break; // use the individual prefs
1.5459 + case nsIDOMKeyEvent::DOM_VK_SHIFT: return NS_MODIFIER_SHIFT;
1.5460 + case nsIDOMKeyEvent::DOM_VK_CONTROL: return NS_MODIFIER_CONTROL;
1.5461 + case nsIDOMKeyEvent::DOM_VK_ALT: return NS_MODIFIER_ALT;
1.5462 + case nsIDOMKeyEvent::DOM_VK_META: return NS_MODIFIER_META;
1.5463 + case nsIDOMKeyEvent::DOM_VK_WIN: return NS_MODIFIER_OS;
1.5464 + default: return 0;
1.5465 + }
1.5466 +
1.5467 + switch (aItemType) {
1.5468 + case nsIDocShellTreeItem::typeChrome:
1.5469 + return sChromeAccessModifierMask;
1.5470 + case nsIDocShellTreeItem::typeContent:
1.5471 + return sContentAccessModifierMask;
1.5472 + default:
1.5473 + return 0;
1.5474 + }
1.5475 +}
1.5476 +
1.5477 +/******************************************************************/
1.5478 +/* mozilla::AutoHandlingUserInputStatePusher */
1.5479 +/******************************************************************/
1.5480 +
1.5481 +AutoHandlingUserInputStatePusher::AutoHandlingUserInputStatePusher(
1.5482 + bool aIsHandlingUserInput,
1.5483 + WidgetEvent* aEvent,
1.5484 + nsIDocument* aDocument) :
1.5485 + mIsHandlingUserInput(aIsHandlingUserInput),
1.5486 + mIsMouseDown(aEvent && aEvent->message == NS_MOUSE_BUTTON_DOWN),
1.5487 + mResetFMMouseDownState(false)
1.5488 +{
1.5489 + if (!aIsHandlingUserInput) {
1.5490 + return;
1.5491 + }
1.5492 + EventStateManager::StartHandlingUserInput();
1.5493 + if (!mIsMouseDown) {
1.5494 + return;
1.5495 + }
1.5496 + nsIPresShell::SetCapturingContent(nullptr, 0);
1.5497 + nsIPresShell::AllowMouseCapture(true);
1.5498 + if (!aDocument || !aEvent->mFlags.mIsTrusted) {
1.5499 + return;
1.5500 + }
1.5501 + nsFocusManager* fm = nsFocusManager::GetFocusManager();
1.5502 + NS_ENSURE_TRUE_VOID(fm);
1.5503 + fm->SetMouseButtonDownHandlingDocument(aDocument);
1.5504 + mResetFMMouseDownState = true;
1.5505 +}
1.5506 +
1.5507 +AutoHandlingUserInputStatePusher::~AutoHandlingUserInputStatePusher()
1.5508 +{
1.5509 + if (!mIsHandlingUserInput) {
1.5510 + return;
1.5511 + }
1.5512 + EventStateManager::StopHandlingUserInput();
1.5513 + if (!mIsMouseDown) {
1.5514 + return;
1.5515 + }
1.5516 + nsIPresShell::AllowMouseCapture(false);
1.5517 + if (!mResetFMMouseDownState) {
1.5518 + return;
1.5519 + }
1.5520 + nsFocusManager* fm = nsFocusManager::GetFocusManager();
1.5521 + NS_ENSURE_TRUE_VOID(fm);
1.5522 + fm->SetMouseButtonDownHandlingDocument(nullptr);
1.5523 +}
1.5524 +
1.5525 +} // namespace mozilla
1.5526 +
