/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=2 sw=2 et tw=80: */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Makoto Kato * Dean Tessman * Mats Palmgren * Masayuki Nakano * Ginn Chen * Simon Bünzli * Ehsan Akhgari * Ningjie Chen * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "mozilla/dom/TabParent.h" #include "nsCOMPtr.h" #include "nsEventStateManager.h" #include "nsEventListenerManager.h" #include "nsIMEStateManager.h" #include "nsContentEventHandler.h" #include "nsIContent.h" #include "nsINodeInfo.h" #include "nsIDocument.h" #include "nsIFrame.h" #include "nsIWidget.h" #include "nsPresContext.h" #include "nsIPresShell.h" #include "nsDOMEvent.h" #include "nsGkAtoms.h" #include "nsIEditorDocShell.h" #include "nsIFormControl.h" #include "nsIComboboxControlFrame.h" #include "nsIScrollableFrame.h" #include "nsIDOMNSHTMLElement.h" #include "nsIDOMHTMLAnchorElement.h" #include "nsIDOMHTMLInputElement.h" #include "nsIDOMHTMLLabelElement.h" #include "nsIDOMHTMLSelectElement.h" #include "nsIDOMHTMLTextAreaElement.h" #include "nsIDOMHTMLAreaElement.h" #include "nsIDOMHTMLButtonElement.h" #include "nsIDOMHTMLObjectElement.h" #include "nsIDOMHTMLImageElement.h" #include "nsIDOMHTMLMapElement.h" #include "nsIDOMHTMLBodyElement.h" #include "nsIDOMXULControlElement.h" #include "nsIDOMXULTextboxElement.h" #include "nsINameSpaceManager.h" #include "nsIBaseWindow.h" #include "nsIView.h" #include "nsIViewManager.h" #include "nsISelection.h" #include "nsFrameSelection.h" #include "nsIPrivateDOMEvent.h" #include "nsIDOMWindowInternal.h" #include "nsPIDOMWindow.h" #include "nsPIWindowRoot.h" #include "nsIEnumerator.h" #include "nsIDocShellTreeItem.h" #include "nsIDocShellTreeNode.h" #include "nsIWebNavigation.h" #include "nsIContentViewer.h" #ifdef MOZ_XUL #include "nsXULPopupManager.h" #endif #include "nsFrameManager.h" #include "nsIServiceManager.h" #include "nsIScriptSecurityManager.h" #include "nsFocusManager.h" #include "nsIDOMXULElement.h" #include "nsIDOMDocument.h" #include "nsIDOMKeyEvent.h" #include "nsIObserverService.h" #include "nsIDocShell.h" #include "nsIMarkupDocumentViewer.h" #include "nsIDOMMouseScrollEvent.h" #include "nsIDOMDragEvent.h" #include "nsIDOMEventTarget.h" #include "nsIDOMNSUIEvent.h" #include "nsDOMDragEvent.h" #include "nsIDOMNSEditableElement.h" #include "nsIDOMRange.h" #include "nsCaret.h" #include "nsILookAndFeel.h" #include "nsWidgetsCID.h" #include "nsSubDocumentFrame.h" #include "nsIFrameTraversal.h" #include "nsLayoutCID.h" #include "nsLayoutUtils.h" #include "nsIInterfaceRequestorUtils.h" #include "nsUnicharUtils.h" #include "nsContentUtils.h" #include "imgIContainer.h" #include "nsIProperties.h" #include "nsISupportsPrimitives.h" #include "nsEventDispatcher.h" #include "nsServiceManagerUtils.h" #include "nsITimer.h" #include "nsFontMetrics.h" #include "nsIDOMXULDocument.h" #include "nsIDragService.h" #include "nsIDragSession.h" #include "nsDOMDataTransfer.h" #include "nsContentAreaDragDrop.h" #ifdef MOZ_XUL #include "nsTreeBodyFrame.h" #endif #include "nsIController.h" #include "nsICommandParams.h" #include "mozilla/Services.h" #include "mozAutoDocUpdate.h" #include "nsHTMLLabelElement.h" #include "mozilla/Preferences.h" #ifdef XP_MACOSX #import #endif using namespace mozilla; using namespace mozilla::dom; //#define DEBUG_DOCSHELL_FOCUS #define NS_USER_INTERACTION_INTERVAL 5000 // ms static NS_DEFINE_CID(kFrameTraversalCID, NS_FRAMETRAVERSAL_CID); static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID); static PRBool sLeftClickOnly = PR_TRUE; static PRBool sKeyCausesActivation = PR_TRUE; static PRUint32 sESMInstanceCount = 0; static PRInt32 sChromeAccessModifier = 0, sContentAccessModifier = 0; PRInt32 nsEventStateManager::sUserInputEventDepth = 0; PRBool nsEventStateManager::sNormalLMouseEventInProcess = PR_FALSE; nsEventStateManager* nsEventStateManager::sActiveESM = nsnull; nsIDocument* nsEventStateManager::sMouseOverDocument = nsnull; static PRUint32 gMouseOrKeyboardEventCounter = 0; static nsITimer* gUserInteractionTimer = nsnull; static nsITimerCallback* gUserInteractionTimerCallback = nsnull; // Pixel scroll accumulation for synthetic line scrolls static nscoord gPixelScrollDeltaX = 0; static nscoord gPixelScrollDeltaY = 0; static PRUint32 gPixelScrollDeltaTimeout = 0; static nscoord GetScrollableLineHeight(nsIFrame* aTargetFrame); static inline PRBool IsMouseEventReal(nsEvent* aEvent) { NS_ABORT_IF_FALSE(NS_IS_MOUSE_EVENT_STRUCT(aEvent), "Not a mouse event"); // Return true if not synthesized. return static_cast(aEvent)->reason == nsMouseEvent::eReal; } #ifdef DEBUG_DOCSHELL_FOCUS static void PrintDocTree(nsIDocShellTreeItem* aParentItem, int aLevel) { for (PRInt32 i=0;iGetChildCount(&childWebshellCount); nsCOMPtr parentAsDocShell(do_QueryInterface(aParentItem)); PRInt32 type; aParentItem->GetItemType(&type); nsCOMPtr presShell; parentAsDocShell->GetPresShell(getter_AddRefs(presShell)); nsRefPtr presContext; parentAsDocShell->GetPresContext(getter_AddRefs(presContext)); nsCOMPtr cv; parentAsDocShell->GetContentViewer(getter_AddRefs(cv)); nsCOMPtr domDoc; if (cv) cv->GetDOMDocument(getter_AddRefs(domDoc)); nsCOMPtr doc = do_QueryInterface(domDoc); nsCOMPtr domwin = doc ? doc->GetWindow() : nsnull; nsIURI* uri = doc ? doc->GetDocumentURI() : nsnull; printf("DS %p Type %s Cnt %d Doc %p DW %p EM %p%c", static_cast(parentAsDocShell.get()), type==nsIDocShellTreeItem::typeChrome?"Chrome":"Content", childWebshellCount, static_cast(doc.get()), static_cast(domwin.get()), static_cast(presContext ? presContext->EventStateManager() : nsnull), uri ? ' ' : '\n'); if (uri) { nsCAutoString spec; uri->GetSpec(spec); printf("\"%s\"\n", spec.get()); } if (childWebshellCount > 0) { for (PRInt32 i = 0; i < childWebshellCount; i++) { nsCOMPtr child; aParentItem->GetChildAt(i, getter_AddRefs(child)); PrintDocTree(child, aLevel + 1); } } } static void PrintDocTreeAll(nsIDocShellTreeItem* aItem) { nsCOMPtr item = aItem; for(;;) { nsCOMPtr parent; item->GetParent(getter_AddRefs(parent)); if (!parent) break; item = parent; } PrintDocTree(item, 0); } #endif class nsUITimerCallback : public nsITimerCallback { public: nsUITimerCallback() : mPreviousCount(0) {} NS_DECL_ISUPPORTS NS_DECL_NSITIMERCALLBACK private: PRUint32 mPreviousCount; }; NS_IMPL_ISUPPORTS1(nsUITimerCallback, nsITimerCallback) // If aTimer is nsnull, this method always sends "user-interaction-inactive" // notification. NS_IMETHODIMP nsUITimerCallback::Notify(nsITimer* aTimer) { nsCOMPtr obs = mozilla::services::GetObserverService(); if (!obs) return NS_ERROR_FAILURE; if ((gMouseOrKeyboardEventCounter == mPreviousCount) || !aTimer) { gMouseOrKeyboardEventCounter = 0; obs->NotifyObservers(nsnull, "user-interaction-inactive", nsnull); if (gUserInteractionTimer) { gUserInteractionTimer->Cancel(); NS_RELEASE(gUserInteractionTimer); } } else { obs->NotifyObservers(nsnull, "user-interaction-active", nsnull); nsEventStateManager::UpdateUserActivityTimer(); } mPreviousCount = gMouseOrKeyboardEventCounter; return NS_OK; } enum { MOUSE_SCROLL_N_LINES, MOUSE_SCROLL_PAGE, MOUSE_SCROLL_HISTORY, MOUSE_SCROLL_ZOOM, MOUSE_SCROLL_PIXELS }; // mask values for ui.key.chromeAccess and ui.key.contentAccess #define NS_MODIFIER_SHIFT 1 #define NS_MODIFIER_CONTROL 2 #define NS_MODIFIER_ALT 4 #define NS_MODIFIER_META 8 static nsIDocument * GetDocumentFromWindow(nsIDOMWindow *aWindow) { nsCOMPtr win = do_QueryInterface(aWindow); nsCOMPtr doc; if (win) { doc = do_QueryInterface(win->GetExtantDocument()); } return doc; } static PRInt32 GetAccessModifierMaskFromPref(PRInt32 aItemType) { PRInt32 accessKey = Preferences::GetInt("ui.key.generalAccessKey", -1); switch (accessKey) { case -1: break; // use the individual prefs case nsIDOMKeyEvent::DOM_VK_SHIFT: return NS_MODIFIER_SHIFT; case nsIDOMKeyEvent::DOM_VK_CONTROL: return NS_MODIFIER_CONTROL; case nsIDOMKeyEvent::DOM_VK_ALT: return NS_MODIFIER_ALT; case nsIDOMKeyEvent::DOM_VK_META: return NS_MODIFIER_META; default: return 0; } switch (aItemType) { case nsIDocShellTreeItem::typeChrome: return Preferences::GetInt("ui.key.chromeAccess", 0); case nsIDocShellTreeItem::typeContent: return Preferences::GetInt("ui.key.contentAccess", 0); default: return 0; } } static void GetBasePrefKeyForMouseWheel(nsMouseScrollEvent* aEvent, nsACString& aPref) { NS_NAMED_LITERAL_CSTRING(prefbase, "mousewheel"); NS_NAMED_LITERAL_CSTRING(horizscroll, ".horizscroll"); NS_NAMED_LITERAL_CSTRING(withshift, ".withshiftkey"); NS_NAMED_LITERAL_CSTRING(withalt, ".withaltkey"); NS_NAMED_LITERAL_CSTRING(withcontrol, ".withcontrolkey"); NS_NAMED_LITERAL_CSTRING(withmetakey, ".withmetakey"); NS_NAMED_LITERAL_CSTRING(withno, ".withnokey"); aPref = prefbase; if (aEvent->scrollFlags & nsMouseScrollEvent::kIsHorizontal) { aPref.Append(horizscroll); } if (aEvent->isShift) { aPref.Append(withshift); } else if (aEvent->isControl) { aPref.Append(withcontrol); } else if (aEvent->isAlt) { aPref.Append(withalt); } else if (aEvent->isMeta) { aPref.Append(withmetakey); } else { aPref.Append(withno); } } class nsMouseWheelTransaction { public: static nsIFrame* GetTargetFrame() { return sTargetFrame; } static void BeginTransaction(nsIFrame* aTargetFrame, PRInt32 aNumLines, PRBool aScrollHorizontal); // Be careful, UpdateTransaction may fire a DOM event, therefore, the target // frame might be destroyed in the event handler. static PRBool UpdateTransaction(PRInt32 aNumLines, PRBool aScrollHorizontal); static void EndTransaction(); static void OnEvent(nsEvent* aEvent); static void Shutdown(); static PRUint32 GetTimeoutTime(); static PRInt32 AccelerateWheelDelta(PRInt32 aScrollLines, PRBool aIsHorizontal, PRBool aAllowScrollSpeedOverride, nsIScrollableFrame::ScrollUnit *aScrollQuantity, PRBool aLimitToMaxOnePageScroll = PR_TRUE); static PRBool IsAccelerationEnabled(); enum { kScrollSeriesTimeout = 80 }; protected: static nsIntPoint GetScreenPoint(nsGUIEvent* aEvent); static void OnFailToScrollTarget(); static void OnTimeout(nsITimer *aTimer, void *aClosure); static void SetTimeout(); static PRUint32 GetIgnoreMoveDelayTime(); static PRInt32 GetAccelerationStart(); static PRInt32 GetAccelerationFactor(); static PRInt32 OverrideSystemScrollSpeed(PRInt32 aScrollLines, PRBool aIsHorizontal); static PRInt32 ComputeAcceleratedWheelDelta(PRInt32 aDelta, PRInt32 aFactor); static PRInt32 LimitToOnePageScroll(PRInt32 aScrollLines, PRBool aIsHorizontal, nsIScrollableFrame::ScrollUnit *aScrollQuantity); static nsWeakFrame sTargetFrame; static PRUint32 sTime; // in milliseconds static PRUint32 sMouseMoved; // in milliseconds static nsITimer* sTimer; static PRInt32 sScrollSeriesCounter; }; nsWeakFrame nsMouseWheelTransaction::sTargetFrame(nsnull); PRUint32 nsMouseWheelTransaction::sTime = 0; PRUint32 nsMouseWheelTransaction::sMouseMoved = 0; nsITimer* nsMouseWheelTransaction::sTimer = nsnull; PRInt32 nsMouseWheelTransaction::sScrollSeriesCounter = 0; static PRBool OutOfTime(PRUint32 aBaseTime, PRUint32 aThreshold) { PRUint32 now = PR_IntervalToMilliseconds(PR_IntervalNow()); return (now - aBaseTime > aThreshold); } static PRBool CanScrollInRange(nscoord aMin, nscoord aValue, nscoord aMax, PRInt32 aDirection) { return aDirection > 0 ? aValue < aMax : aMin < aValue; } static PRBool CanScrollOn(nsIScrollableFrame* aScrollFrame, PRInt32 aNumLines, PRBool aScrollHorizontal) { NS_PRECONDITION(aScrollFrame, "aScrollFrame is null"); NS_PRECONDITION(aNumLines, "aNumLines must be non-zero"); nsPoint scrollPt = aScrollFrame->GetScrollPosition(); nsRect scrollRange = aScrollFrame->GetScrollRange(); return aScrollHorizontal ? CanScrollInRange(scrollRange.x, scrollPt.x, scrollRange.XMost(), aNumLines) : CanScrollInRange(scrollRange.y, scrollPt.y, scrollRange.YMost(), aNumLines); } void nsMouseWheelTransaction::BeginTransaction(nsIFrame* aTargetFrame, PRInt32 aNumLines, PRBool aScrollHorizontal) { NS_ASSERTION(!sTargetFrame, "previous transaction is not finished!"); sTargetFrame = aTargetFrame; sScrollSeriesCounter = 0; if (!UpdateTransaction(aNumLines, aScrollHorizontal)) { NS_ERROR("BeginTransaction is called even cannot scroll the frame"); EndTransaction(); } } PRBool nsMouseWheelTransaction::UpdateTransaction(PRInt32 aNumLines, PRBool aScrollHorizontal) { nsIScrollableFrame* sf = GetTargetFrame()->GetScrollTargetFrame(); NS_ENSURE_TRUE(sf, PR_FALSE); if (!CanScrollOn(sf, aNumLines, aScrollHorizontal)) { OnFailToScrollTarget(); // We should not modify the transaction state when the view will not be // scrolled actually. return PR_FALSE; } SetTimeout(); if (sScrollSeriesCounter != 0 && OutOfTime(sTime, kScrollSeriesTimeout)) sScrollSeriesCounter = 0; sScrollSeriesCounter++; // We should use current time instead of nsEvent.time. // 1. Some events doesn't have the correct creation time. // 2. If the computer runs slowly by other processes eating the CPU resource, // the event creation time doesn't keep real time. sTime = PR_IntervalToMilliseconds(PR_IntervalNow()); sMouseMoved = 0; return PR_TRUE; } void nsMouseWheelTransaction::EndTransaction() { if (sTimer) sTimer->Cancel(); sTargetFrame = nsnull; sScrollSeriesCounter = 0; } void nsMouseWheelTransaction::OnEvent(nsEvent* aEvent) { if (!sTargetFrame) return; if (OutOfTime(sTime, GetTimeoutTime())) { // Even if the scroll event which is handled after timeout, but onTimeout // was not fired by timer, then the scroll event will scroll old frame, // therefore, we should call OnTimeout here and ensure to finish the old // transaction. OnTimeout(nsnull, nsnull); return; } PRInt32 message = aEvent->message; // If the event is query scroll target info event, that causes modifying // wheel transaction because DoScrollText() needs to use them. Therefore, // we should handle the event as its mouse scroll event here. if (message == NS_QUERY_SCROLL_TARGET_INFO) { nsQueryContentEvent* queryEvent = static_cast(aEvent); message = queryEvent->mInput.mMouseScrollEvent->message; } switch (message) { case NS_MOUSE_SCROLL: case NS_MOUSE_PIXEL_SCROLL: if (sMouseMoved != 0 && OutOfTime(sMouseMoved, GetIgnoreMoveDelayTime())) { // Terminate the current mousewheel transaction if the mouse moved more // than ignoremovedelay milliseconds ago EndTransaction(); } return; case NS_MOUSE_MOVE: case NS_DRAGDROP_OVER: if (IsMouseEventReal(aEvent)) { // If the cursor is moving to be outside the frame, // terminate the scrollwheel transaction. nsIntPoint pt = GetScreenPoint((nsGUIEvent*)aEvent); nsIntRect r = sTargetFrame->GetScreenRectExternal(); if (!r.Contains(pt)) { EndTransaction(); return; } // If the cursor is moving inside the frame, and it is less than // ignoremovedelay milliseconds since the last scroll operation, ignore // the mouse move; otherwise, record the current mouse move time to be // checked later if (OutOfTime(sTime, GetIgnoreMoveDelayTime())) { if (sMouseMoved == 0) sMouseMoved = PR_IntervalToMilliseconds(PR_IntervalNow()); } } return; case NS_KEY_PRESS: case NS_KEY_UP: case NS_KEY_DOWN: case NS_MOUSE_BUTTON_UP: case NS_MOUSE_BUTTON_DOWN: case NS_MOUSE_DOUBLECLICK: case NS_MOUSE_CLICK: case NS_CONTEXTMENU: case NS_DRAGDROP_DROP: EndTransaction(); return; } } void nsMouseWheelTransaction::Shutdown() { NS_IF_RELEASE(sTimer); } void nsMouseWheelTransaction::OnFailToScrollTarget() { NS_PRECONDITION(sTargetFrame, "We don't have mouse scrolling transaction"); if (Preferences::GetBool("test.mousescroll", PR_FALSE)) { // This event is used for automated tests, see bug 442774. nsContentUtils::DispatchTrustedEvent( sTargetFrame->GetContent()->GetOwnerDoc(), sTargetFrame->GetContent(), NS_LITERAL_STRING("MozMouseScrollFailed"), PR_TRUE, PR_TRUE); } // The target frame might be destroyed in the event handler, at that time, // we need to finish the current transaction if (!sTargetFrame) EndTransaction(); } void nsMouseWheelTransaction::OnTimeout(nsITimer* aTimer, void* aClosure) { if (!sTargetFrame) { // The transaction target was destroyed already EndTransaction(); return; } // Store the sTargetFrame, the variable becomes null in EndTransaction. nsIFrame* frame = sTargetFrame; // We need to finish current transaction before DOM event firing. Because // the next DOM event might create strange situation for us. EndTransaction(); if (Preferences::GetBool("test.mousescroll", PR_FALSE)) { // This event is used for automated tests, see bug 442774. nsContentUtils::DispatchTrustedEvent( frame->GetContent()->GetOwnerDoc(), frame->GetContent(), NS_LITERAL_STRING("MozMouseScrollTransactionTimeout"), PR_TRUE, PR_TRUE); } } void nsMouseWheelTransaction::SetTimeout() { if (!sTimer) { nsCOMPtr timer = do_CreateInstance(NS_TIMER_CONTRACTID); if (!timer) return; timer.swap(sTimer); } sTimer->Cancel(); #ifdef DEBUG nsresult rv = #endif sTimer->InitWithFuncCallback(OnTimeout, nsnull, GetTimeoutTime(), nsITimer::TYPE_ONE_SHOT); NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "nsITimer::InitWithFuncCallback failed"); } nsIntPoint nsMouseWheelTransaction::GetScreenPoint(nsGUIEvent* aEvent) { NS_ASSERTION(aEvent, "aEvent is null"); NS_ASSERTION(aEvent->widget, "aEvent-widget is null"); return aEvent->refPoint + aEvent->widget->WidgetToScreenOffset(); } PRUint32 nsMouseWheelTransaction::GetTimeoutTime() { return Preferences::GetUint("mousewheel.transaction.timeout", 1500); } PRUint32 nsMouseWheelTransaction::GetIgnoreMoveDelayTime() { return Preferences::GetUint("mousewheel.transaction.ignoremovedelay", 100); } PRBool nsMouseWheelTransaction::IsAccelerationEnabled() { return GetAccelerationStart() >= 0 && GetAccelerationFactor() > 0; } PRInt32 nsMouseWheelTransaction::AccelerateWheelDelta(PRInt32 aScrollLines, PRBool aIsHorizontal, PRBool aAllowScrollSpeedOverride, nsIScrollableFrame::ScrollUnit *aScrollQuantity, PRBool aLimitToMaxOnePageScroll) { if (aAllowScrollSpeedOverride) { aScrollLines = OverrideSystemScrollSpeed(aScrollLines, aIsHorizontal); } // Accelerate by the sScrollSeriesCounter PRInt32 start = GetAccelerationStart(); if (start >= 0 && sScrollSeriesCounter >= start) { PRInt32 factor = GetAccelerationFactor(); if (factor > 0) { aScrollLines = ComputeAcceleratedWheelDelta(aScrollLines, factor); } } // If the computed delta is larger than the page, we should limit // the delta value to the one page size. return !aLimitToMaxOnePageScroll ? aScrollLines : LimitToOnePageScroll(aScrollLines, aIsHorizontal, aScrollQuantity); } PRInt32 nsMouseWheelTransaction::ComputeAcceleratedWheelDelta(PRInt32 aDelta, PRInt32 aFactor) { if (aDelta == 0) return 0; return PRInt32(NS_round(aDelta * sScrollSeriesCounter * (double)aFactor / 10)); } PRInt32 nsMouseWheelTransaction::GetAccelerationStart() { return Preferences::GetInt("mousewheel.acceleration.start", -1); } PRInt32 nsMouseWheelTransaction::GetAccelerationFactor() { return Preferences::GetInt("mousewheel.acceleration.factor", -1); } PRInt32 nsMouseWheelTransaction::OverrideSystemScrollSpeed(PRInt32 aScrollLines, PRBool aIsHorizontal) { NS_PRECONDITION(sTargetFrame, "We don't have mouse scrolling transaction"); if (aScrollLines == 0) { return 0; } // We shouldn't override the scrolling speed on non root scroll frame. if (sTargetFrame != sTargetFrame->PresContext()->PresShell()->GetRootScrollFrame()) { return aScrollLines; } // Compute the overridden speed to nsIWidget. The widget can check the // conditions (e.g., checking the prefs, and also whether the user customized // the system settings of the mouse wheel scrolling or not), and can limit // the speed for preventing the unexpected high speed scrolling. nsCOMPtr widget(sTargetFrame->GetNearestWidget()); NS_ENSURE_TRUE(widget, aScrollLines); PRInt32 overriddenDelta; nsresult rv = widget->OverrideSystemMouseScrollSpeed(aScrollLines, aIsHorizontal, overriddenDelta); NS_ENSURE_SUCCESS(rv, aScrollLines); return overriddenDelta; } PRInt32 nsMouseWheelTransaction::LimitToOnePageScroll(PRInt32 aScrollLines, PRBool aIsHorizontal, nsIScrollableFrame::ScrollUnit *aScrollQuantity) { NS_ENSURE_TRUE(aScrollQuantity, aScrollLines); NS_PRECONDITION(*aScrollQuantity == nsIScrollableFrame::LINES, "aScrollQuantity isn't by line"); NS_ENSURE_TRUE(sTargetFrame, aScrollLines); nsIScrollableFrame* sf = sTargetFrame->GetScrollTargetFrame(); NS_ENSURE_TRUE(sf, aScrollLines); // Limit scrolling to be at most one page, but if possible, try to // just adjust the number of scrolled lines. nsSize lineAmount = sf->GetLineScrollAmount(); nscoord lineScroll = aIsHorizontal ? lineAmount.width : lineAmount.height; if (lineScroll == 0) return aScrollLines; nsSize pageAmount = sf->GetPageScrollAmount(); nscoord pageScroll = aIsHorizontal ? pageAmount.width : pageAmount.height; if (NS_ABS(aScrollLines) * lineScroll < pageScroll) return aScrollLines; nscoord maxLines = (pageScroll / lineScroll); if (maxLines >= 1) return ((aScrollLines < 0) ? -1 : 1) * maxLines; *aScrollQuantity = nsIScrollableFrame::PAGES; return (aScrollLines < 0) ? -1 : 1; } /******************************************************************/ /* nsEventStateManager */ /******************************************************************/ nsEventStateManager::nsEventStateManager() : mLockCursor(0), mCurrentTarget(nsnull), mLastMouseOverFrame(nsnull), mLastDragOverFrame(nsnull), // init d&d gesture state machine variables mGestureDownPoint(0,0), mPresContext(nsnull), mLClickCount(0), mMClickCount(0), mRClickCount(0), m_haveShutdown(PR_FALSE), mLastLineScrollConsumedX(PR_FALSE), mLastLineScrollConsumedY(PR_FALSE), mClickHoldContextMenu(PR_FALSE) { if (sESMInstanceCount == 0) { gUserInteractionTimerCallback = new nsUITimerCallback(); if (gUserInteractionTimerCallback) NS_ADDREF(gUserInteractionTimerCallback); UpdateUserActivityTimer(); } ++sESMInstanceCount; } nsresult nsEventStateManager::UpdateUserActivityTimer(void) { if (!gUserInteractionTimerCallback) return NS_OK; if (!gUserInteractionTimer) CallCreateInstance("@mozilla.org/timer;1", &gUserInteractionTimer); if (gUserInteractionTimer) { gUserInteractionTimer->InitWithCallback(gUserInteractionTimerCallback, NS_USER_INTERACTION_INTERVAL, nsITimer::TYPE_ONE_SHOT); } return NS_OK; } static const char* kObservedPrefs[] = { "accessibility.accesskeycausesactivation", "nglayout.events.dispatchLeftClickOnly", "ui.key.generalAccessKey", "ui.key.chromeAccess", "ui.key.contentAccess", "ui.click_hold_context_menus", #if 0 "mousewheel.withaltkey.action", "mousewheel.withaltkey.numlines", "mousewheel.withaltkey.sysnumlines", "mousewheel.withcontrolkey.action", "mousewheel.withcontrolkey.numlines", "mousewheel.withcontrolkey.sysnumlines", "mousewheel.withnokey.action", "mousewheel.withnokey.numlines", "mousewheel.withnokey.sysnumlines", "mousewheel.withshiftkey.action", "mousewheel.withshiftkey.numlines", "mousewheel.withshiftkey.sysnumlines", #endif "dom.popup_allowed_events", nsnull }; nsresult nsEventStateManager::Init() { nsCOMPtr observerService = mozilla::services::GetObserverService(); if (!observerService) return NS_ERROR_FAILURE; observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, PR_TRUE); if (sESMInstanceCount == 1) { sKeyCausesActivation = Preferences::GetBool("accessibility.accesskeycausesactivation", sKeyCausesActivation); sLeftClickOnly = Preferences::GetBool("nglayout.events.dispatchLeftClickOnly", sLeftClickOnly); sChromeAccessModifier = GetAccessModifierMaskFromPref(nsIDocShellTreeItem::typeChrome); sContentAccessModifier = GetAccessModifierMaskFromPref(nsIDocShellTreeItem::typeContent); } Preferences::AddWeakObservers(this, kObservedPrefs); mClickHoldContextMenu = Preferences::GetBool("ui.click_hold_context_menus", PR_FALSE); return NS_OK; } nsEventStateManager::~nsEventStateManager() { if (sActiveESM == this) { sActiveESM = nsnull; } if (mClickHoldContextMenu) KillClickHoldTimer(); if (mDocument == sMouseOverDocument) sMouseOverDocument = nsnull; --sESMInstanceCount; if(sESMInstanceCount == 0) { nsMouseWheelTransaction::Shutdown(); if (gUserInteractionTimerCallback) { gUserInteractionTimerCallback->Notify(nsnull); NS_RELEASE(gUserInteractionTimerCallback); } if (gUserInteractionTimer) { gUserInteractionTimer->Cancel(); NS_RELEASE(gUserInteractionTimer); } } if (!m_haveShutdown) { Shutdown(); // Don't remove from Observer service in Shutdown because Shutdown also // gets called from xpcom shutdown observer. And we don't want to remove // from the service in that case. nsCOMPtr observerService = mozilla::services::GetObserverService(); if (observerService) { observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID); } } } nsresult nsEventStateManager::Shutdown() { Preferences::RemoveObservers(this, kObservedPrefs); m_haveShutdown = PR_TRUE; return NS_OK; } NS_IMETHODIMP nsEventStateManager::Observe(nsISupports *aSubject, const char *aTopic, const PRUnichar *someData) { if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) Shutdown(); else if (!nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) { if (!someData) return NS_OK; nsDependentString data(someData); if (data.EqualsLiteral("accessibility.accesskeycausesactivation")) { sKeyCausesActivation = Preferences::GetBool("accessibility.accesskeycausesactivation", sKeyCausesActivation); } else if (data.EqualsLiteral("nglayout.events.dispatchLeftClickOnly")) { sLeftClickOnly = Preferences::GetBool("nglayout.events.dispatchLeftClickOnly", sLeftClickOnly); } else if (data.EqualsLiteral("ui.key.generalAccessKey")) { sChromeAccessModifier = GetAccessModifierMaskFromPref(nsIDocShellTreeItem::typeChrome); sContentAccessModifier = GetAccessModifierMaskFromPref(nsIDocShellTreeItem::typeContent); } else if (data.EqualsLiteral("ui.key.chromeAccess")) { sChromeAccessModifier = GetAccessModifierMaskFromPref(nsIDocShellTreeItem::typeChrome); } else if (data.EqualsLiteral("ui.key.contentAccess")) { sContentAccessModifier = GetAccessModifierMaskFromPref(nsIDocShellTreeItem::typeContent); } else if (data.EqualsLiteral("ui.click_hold_context_menus")) { mClickHoldContextMenu = Preferences::GetBool("ui.click_hold_context_menus", PR_FALSE); #if 0 } else if (data.EqualsLiteral("mousewheel.withaltkey.action")) { } else if (data.EqualsLiteral("mousewheel.withaltkey.numlines")) { } else if (data.EqualsLiteral("mousewheel.withaltkey.sysnumlines")) { } else if (data.EqualsLiteral("mousewheel.withcontrolkey.action")) { } else if (data.EqualsLiteral("mousewheel.withcontrolkey.numlines")) { } else if (data.EqualsLiteral("mousewheel.withcontrolkey.sysnumlines")) { } else if (data.EqualsLiteral("mousewheel.withshiftkey.action")) { } else if (data.EqualsLiteral("mousewheel.withshiftkey.numlines")) { } else if (data.EqualsLiteral("mousewheel.withshiftkey.sysnumlines")) { } else if (data.EqualsLiteral("mousewheel.withnokey.action")) { } else if (data.EqualsLiteral("mousewheel.withnokey.numlines")) { } else if (data.EqualsLiteral("mousewheel.withnokey.sysnumlines")) { #endif } else if (data.EqualsLiteral("dom.popup_allowed_events")) { nsDOMEvent::PopupAllowedEventsChanged(); } } return NS_OK; } NS_IMPL_CYCLE_COLLECTION_CLASS(nsEventStateManager) NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsEventStateManager) NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver) NS_INTERFACE_MAP_ENTRY(nsIObserver) NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference) NS_INTERFACE_MAP_END NS_IMPL_CYCLE_COLLECTING_ADDREF(nsEventStateManager) NS_IMPL_CYCLE_COLLECTING_RELEASE(nsEventStateManager) NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsEventStateManager) NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mCurrentTargetContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastMouseOverElement); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mGestureDownContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mGestureDownFrameOwner); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastLeftMouseDownContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastLeftMouseDownContentParent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastMiddleMouseDownContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastMiddleMouseDownContentParent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastRightMouseDownContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mLastRightMouseDownContentParent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mActiveContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mHoverContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mDragOverContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mURLTargetContent); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mFirstMouseOverEventElement); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mFirstMouseOutEventElement); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mDocument); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMARRAY(mAccessKeys); NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsEventStateManager) NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mCurrentTargetContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastMouseOverElement); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mGestureDownContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mGestureDownFrameOwner); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastLeftMouseDownContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastLeftMouseDownContentParent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastMiddleMouseDownContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastMiddleMouseDownContentParent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastRightMouseDownContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mLastRightMouseDownContentParent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mActiveContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mHoverContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mDragOverContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mURLTargetContent); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mFirstMouseOverEventElement); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mFirstMouseOutEventElement); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mDocument); NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMARRAY(mAccessKeys); NS_IMPL_CYCLE_COLLECTION_UNLINK_END nsresult nsEventStateManager::PreHandleEvent(nsPresContext* aPresContext, nsEvent *aEvent, nsIFrame* aTargetFrame, nsEventStatus* aStatus, nsIView* aView) { NS_ENSURE_ARG_POINTER(aStatus); NS_ENSURE_ARG(aPresContext); if (!aEvent) { NS_ERROR("aEvent is null. This should never happen."); return NS_ERROR_NULL_POINTER; } mCurrentTarget = aTargetFrame; mCurrentTargetContent = nsnull; // Focus events don't necessarily need a frame. if (NS_EVENT_NEEDS_FRAME(aEvent)) { NS_ASSERTION(mCurrentTarget, "mCurrentTarget is null. this should not happen. see bug #13007"); if (!mCurrentTarget) return NS_ERROR_NULL_POINTER; } // Do not take account NS_MOUSE_ENTER/EXIT so that loading a page // when user is not active doesn't change the state to active. if (NS_IS_TRUSTED_EVENT(aEvent) && ((aEvent->eventStructType == NS_MOUSE_EVENT && IsMouseEventReal(aEvent) && aEvent->message != NS_MOUSE_ENTER && aEvent->message != NS_MOUSE_EXIT) || aEvent->eventStructType == NS_MOUSE_SCROLL_EVENT || aEvent->eventStructType == NS_KEY_EVENT)) { if (gMouseOrKeyboardEventCounter == 0) { nsCOMPtr obs = mozilla::services::GetObserverService(); if (obs) { obs->NotifyObservers(nsnull, "user-interaction-active", nsnull); UpdateUserActivityTimer(); } } ++gMouseOrKeyboardEventCounter; } *aStatus = nsEventStatus_eIgnore; nsMouseWheelTransaction::OnEvent(aEvent); switch (aEvent->message) { case NS_MOUSE_BUTTON_DOWN: switch (static_cast(aEvent)->button) { case nsMouseEvent::eLeftButton: #ifndef XP_OS2 BeginTrackingDragGesture(aPresContext, (nsMouseEvent*)aEvent, aTargetFrame); #endif mLClickCount = ((nsMouseEvent*)aEvent)->clickCount; SetClickCount(aPresContext, (nsMouseEvent*)aEvent, aStatus); sNormalLMouseEventInProcess = PR_TRUE; break; case nsMouseEvent::eMiddleButton: mMClickCount = ((nsMouseEvent*)aEvent)->clickCount; SetClickCount(aPresContext, (nsMouseEvent*)aEvent, aStatus); break; case nsMouseEvent::eRightButton: #ifdef XP_OS2 BeginTrackingDragGesture(aPresContext, (nsMouseEvent*)aEvent, aTargetFrame); #endif mRClickCount = ((nsMouseEvent*)aEvent)->clickCount; SetClickCount(aPresContext, (nsMouseEvent*)aEvent, aStatus); break; } break; case NS_MOUSE_BUTTON_UP: switch (static_cast(aEvent)->button) { case nsMouseEvent::eLeftButton: if (mClickHoldContextMenu) { KillClickHoldTimer(); } #ifndef XP_OS2 StopTrackingDragGesture(); #endif sNormalLMouseEventInProcess = PR_FALSE; // then fall through... case nsMouseEvent::eRightButton: #ifdef XP_OS2 StopTrackingDragGesture(); #endif // then fall through... case nsMouseEvent::eMiddleButton: SetClickCount(aPresContext, (nsMouseEvent*)aEvent, aStatus); break; } break; case NS_MOUSE_EXIT: // If the event is not a top-level window exit, then it's not // really an exit --- we may have traversed widget boundaries but // we're still in our toplevel window. { nsMouseEvent* mouseEvent = static_cast(aEvent); if (mouseEvent->exit != nsMouseEvent::eTopLevel) { // Treat it as a synthetic move so we don't generate spurious // "exit" or "move" events. Any necessary "out" or "over" events // will be generated by GenerateMouseEnterExit mouseEvent->message = NS_MOUSE_MOVE; mouseEvent->reason = nsMouseEvent::eSynthesized; // then fall through... } else { GenerateMouseEnterExit((nsGUIEvent*)aEvent); //This is a window level mouse exit event and should stop here aEvent->message = 0; break; } } case NS_MOUSE_MOVE: // on the Mac, GenerateDragGesture() may not return until the drag // has completed and so |aTargetFrame| may have been deleted (moving // a bookmark, for example). If this is the case, however, we know // that ClearFrameRefs() has been called and it cleared out // |mCurrentTarget|. As a result, we should pass |mCurrentTarget| // into UpdateCursor(). GenerateDragGesture(aPresContext, (nsMouseEvent*)aEvent); UpdateCursor(aPresContext, aEvent, mCurrentTarget, aStatus); GenerateMouseEnterExit((nsGUIEvent*)aEvent); break; case NS_DRAGDROP_GESTURE: if (mClickHoldContextMenu) { // an external drag gesture event came in, not generated internally // by Gecko. Make sure we get rid of the click-hold timer. KillClickHoldTimer(); } break; case NS_DRAGDROP_OVER: // NS_DRAGDROP_DROP is fired before NS_DRAGDROP_DRAGDROP so send // the enter/exit events before NS_DRAGDROP_DROP. GenerateDragDropEnterExit(aPresContext, (nsGUIEvent*)aEvent); break; case NS_KEY_PRESS: { nsKeyEvent* keyEvent = (nsKeyEvent*)aEvent; PRInt32 modifierMask = 0; if (keyEvent->isShift) modifierMask |= NS_MODIFIER_SHIFT; if (keyEvent->isControl) modifierMask |= NS_MODIFIER_CONTROL; if (keyEvent->isAlt) modifierMask |= NS_MODIFIER_ALT; if (keyEvent->isMeta) modifierMask |= NS_MODIFIER_META; // Prevent keyboard scrolling while an accesskey modifier is in use. if (modifierMask && (modifierMask == sChromeAccessModifier || modifierMask == sContentAccessModifier)) HandleAccessKey(aPresContext, keyEvent, aStatus, nsnull, eAccessKeyProcessingNormal, modifierMask); } // then fall through... case NS_KEY_DOWN: case NS_KEY_UP: { nsIContent* content = GetFocusedContent(); if (content) mCurrentTargetContent = content; } break; case NS_MOUSE_SCROLL: { nsIContent* content = GetFocusedContent(); if (content) mCurrentTargetContent = content; nsMouseScrollEvent* msEvent = static_cast(aEvent); PRBool useSysNumLines = UseSystemScrollSettingFor(msEvent); PRInt32 action = GetWheelActionFor(msEvent); if (!useSysNumLines) { // If the scroll event's delta isn't to our liking, we can // override it with the "numlines" parameter. There are two // things we can do: // // (1) Pick a different number. Instead of scrolling 3 // lines ("delta" in Gtk2), we would scroll 1 line. // (2) Swap directions. Instead of scrolling down, scroll up. // // For the first item, the magnitude of the parameter is // used instead of the magnitude of the delta. For the // second item, if the parameter is negative we swap // directions. PRInt32 numLines = GetScrollLinesFor(msEvent); PRBool swapDirs = (numLines < 0); PRInt32 userSize = swapDirs ? -numLines : numLines; PRBool deltaUp = (msEvent->delta < 0); if (swapDirs) { deltaUp = !deltaUp; } msEvent->delta = deltaUp ? -userSize : userSize; } if ((useSysNumLines && (msEvent->scrollFlags & nsMouseScrollEvent::kIsFullPage)) || action == MOUSE_SCROLL_PAGE) { msEvent->delta = (msEvent->delta > 0) ? PRInt32(nsIDOMNSUIEvent::SCROLL_PAGE_DOWN) : PRInt32(nsIDOMNSUIEvent::SCROLL_PAGE_UP); } } break; case NS_MOUSE_PIXEL_SCROLL: { nsIContent* content = GetFocusedContent(); if (content) mCurrentTargetContent = content; nsMouseScrollEvent *msEvent = static_cast(aEvent); // Clear old deltas after a period of non action if (OutOfTime(gPixelScrollDeltaTimeout, nsMouseWheelTransaction::GetTimeoutTime())) { gPixelScrollDeltaX = gPixelScrollDeltaY = 0; } gPixelScrollDeltaTimeout = PR_IntervalToMilliseconds(PR_IntervalNow()); // If needed send a line scroll event for pixel scrolls with kNoLines if (msEvent->scrollFlags & nsMouseScrollEvent::kNoLines) { nscoord pixelHeight = aPresContext->AppUnitsToIntCSSPixels( GetScrollableLineHeight(aTargetFrame)); if (msEvent->scrollFlags & nsMouseScrollEvent::kIsVertical) { gPixelScrollDeltaX += msEvent->delta; if (!gPixelScrollDeltaX || !pixelHeight) break; if (NS_ABS(gPixelScrollDeltaX) >= pixelHeight) { PRInt32 numLines = (PRInt32)ceil((float)gPixelScrollDeltaX/(float)pixelHeight); gPixelScrollDeltaX -= numLines*pixelHeight; nsWeakFrame weakFrame(aTargetFrame); SendLineScrollEvent(aTargetFrame, msEvent, aPresContext, aStatus, numLines); NS_ENSURE_STATE(weakFrame.IsAlive()); } } else if (msEvent->scrollFlags & nsMouseScrollEvent::kIsHorizontal) { gPixelScrollDeltaY += msEvent->delta; if (!gPixelScrollDeltaY || !pixelHeight) break; if (NS_ABS(gPixelScrollDeltaY) >= pixelHeight) { PRInt32 numLines = (PRInt32)ceil((float)gPixelScrollDeltaY/(float)pixelHeight); gPixelScrollDeltaY -= numLines*pixelHeight; nsWeakFrame weakFrame(aTargetFrame); SendLineScrollEvent(aTargetFrame, msEvent, aPresContext, aStatus, numLines); NS_ENSURE_STATE(weakFrame.IsAlive()); } } } // When the last line scroll has been canceled, eat the pixel scroll event if ((msEvent->scrollFlags & nsMouseScrollEvent::kIsHorizontal) ? mLastLineScrollConsumedX : mLastLineScrollConsumedY) { *aStatus = nsEventStatus_eConsumeNoDefault; } } break; case NS_QUERY_SELECTED_TEXT: { if (RemoteQueryContentEvent(aEvent)) break; nsContentEventHandler handler(mPresContext); handler.OnQuerySelectedText((nsQueryContentEvent*)aEvent); } break; case NS_QUERY_TEXT_CONTENT: { if (RemoteQueryContentEvent(aEvent)) break; nsContentEventHandler handler(mPresContext); handler.OnQueryTextContent((nsQueryContentEvent*)aEvent); } break; case NS_QUERY_CARET_RECT: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQueryCaretRect((nsQueryContentEvent*)aEvent); } break; case NS_QUERY_TEXT_RECT: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQueryTextRect((nsQueryContentEvent*)aEvent); } break; case NS_QUERY_EDITOR_RECT: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQueryEditorRect((nsQueryContentEvent*)aEvent); } break; case NS_QUERY_CONTENT_STATE: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQueryContentState(static_cast(aEvent)); } break; case NS_QUERY_SELECTION_AS_TRANSFERABLE: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQuerySelectionAsTransferable(static_cast(aEvent)); } break; case NS_QUERY_CHARACTER_AT_POINT: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQueryCharacterAtPoint(static_cast(aEvent)); } break; case NS_QUERY_DOM_WIDGET_HITTEST: { // XXX remote event nsContentEventHandler handler(mPresContext); handler.OnQueryDOMWidgetHittest(static_cast(aEvent)); } break; case NS_QUERY_SCROLL_TARGET_INFO: { DoQueryScrollTargetInfo(static_cast(aEvent), aTargetFrame); break; } case NS_SELECTION_SET: { nsSelectionEvent *selectionEvent = static_cast(aEvent); if (IsTargetCrossProcess(selectionEvent)) { // Will not be handled locally, remote the event if (GetCrossProcessTarget()->SendSelectionEvent(*selectionEvent)) selectionEvent->mSucceeded = PR_TRUE; break; } nsContentEventHandler handler(mPresContext); handler.OnSelectionEvent((nsSelectionEvent*)aEvent); } break; case NS_CONTENT_COMMAND_CUT: case NS_CONTENT_COMMAND_COPY: case NS_CONTENT_COMMAND_PASTE: case NS_CONTENT_COMMAND_DELETE: case NS_CONTENT_COMMAND_UNDO: case NS_CONTENT_COMMAND_REDO: case NS_CONTENT_COMMAND_PASTE_TRANSFERABLE: { DoContentCommandEvent(static_cast(aEvent)); } break; case NS_CONTENT_COMMAND_SCROLL: { DoContentCommandScrollEvent(static_cast(aEvent)); } break; case NS_TEXT_TEXT: { nsTextEvent *textEvent = static_cast(aEvent); if (IsTargetCrossProcess(textEvent)) { // Will not be handled locally, remote the event if (GetCrossProcessTarget()->SendTextEvent(*textEvent)) { // Cancel local dispatching aEvent->flags |= NS_EVENT_FLAG_STOP_DISPATCH; } } } break; case NS_COMPOSITION_START: case NS_COMPOSITION_END: { nsCompositionEvent *compositionEvent = static_cast(aEvent); if (IsTargetCrossProcess(compositionEvent)) { // Will not be handled locally, remote the event if (GetCrossProcessTarget()->SendCompositionEvent(*compositionEvent)) { // Cancel local dispatching aEvent->flags |= NS_EVENT_FLAG_STOP_DISPATCH; } } } break; } return NS_OK; } static PRInt32 GetAccessModifierMask(nsISupports* aDocShell) { nsCOMPtr treeItem(do_QueryInterface(aDocShell)); if (!treeItem) return -1; // invalid modifier PRInt32 itemType; treeItem->GetItemType(&itemType); switch (itemType) { case nsIDocShellTreeItem::typeChrome: return sChromeAccessModifier; case nsIDocShellTreeItem::typeContent: return sContentAccessModifier; default: return -1; // invalid modifier } } static PRBool IsAccessKeyTarget(nsIContent* aContent, nsIFrame* aFrame, nsAString& aKey) { if (!aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::accesskey, aKey, eIgnoreCase)) return PR_FALSE; nsCOMPtr xulDoc = do_QueryInterface(aContent->GetOwnerDoc()); if (!xulDoc && !aContent->IsXUL()) return PR_TRUE; // For XUL we do visibility checks. if (!aFrame) return PR_FALSE; if (aFrame->IsFocusable()) return PR_TRUE; if (!aFrame->GetStyleVisibility()->IsVisible()) return PR_FALSE; if (!aFrame->AreAncestorViewsVisible()) return PR_FALSE; // XUL controls can be activated. nsCOMPtr control(do_QueryInterface(aContent)); if (control) return PR_TRUE; if (aContent->IsHTML()) { nsIAtom* tag = aContent->Tag(); // HTML area, label and legend elements are never focusable, so // we need to check for them explicitly before giving up. if (tag == nsGkAtoms::area || tag == nsGkAtoms::label || tag == nsGkAtoms::legend) return PR_TRUE; } else if (aContent->IsXUL()) { // XUL label elements are never focusable, so we need to check for them // explicitly before giving up. if (aContent->Tag() == nsGkAtoms::label) return PR_TRUE; } return PR_FALSE; } PRBool nsEventStateManager::ExecuteAccessKey(nsTArray& aAccessCharCodes, PRBool aIsTrustedEvent) { PRInt32 count, start = -1; nsIContent* focusedContent = GetFocusedContent(); if (focusedContent) { start = mAccessKeys.IndexOf(focusedContent); if (start == -1 && focusedContent->GetBindingParent()) start = mAccessKeys.IndexOf(focusedContent->GetBindingParent()); } nsIContent *content; nsIFrame *frame; PRInt32 length = mAccessKeys.Count(); for (PRUint32 i = 0; i < aAccessCharCodes.Length(); ++i) { PRUint32 ch = aAccessCharCodes[i]; nsAutoString accessKey; AppendUCS4ToUTF16(ch, accessKey); for (count = 1; count <= length; ++count) { content = mAccessKeys[(start + count) % length]; frame = content->GetPrimaryFrame(); if (IsAccessKeyTarget(content, frame, accessKey)) { PRBool shouldActivate = sKeyCausesActivation; while (shouldActivate && ++count <= length) { nsIContent *oc = mAccessKeys[(start + count) % length]; nsIFrame *of = oc->GetPrimaryFrame(); if (IsAccessKeyTarget(oc, of, accessKey)) shouldActivate = PR_FALSE; } if (shouldActivate) content->PerformAccesskey(shouldActivate, aIsTrustedEvent); else { nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (fm) { nsCOMPtr element = do_QueryInterface(content); fm->SetFocus(element, nsIFocusManager::FLAG_BYKEY); } } return PR_TRUE; } } } return PR_FALSE; } void nsEventStateManager::HandleAccessKey(nsPresContext* aPresContext, nsKeyEvent *aEvent, nsEventStatus* aStatus, nsIDocShellTreeItem* aBubbledFrom, ProcessingAccessKeyState aAccessKeyState, PRInt32 aModifierMask) { nsCOMPtr pcContainer = aPresContext->GetContainer(); // Alt or other accesskey modifier is down, we may need to do an accesskey if (mAccessKeys.Count() > 0 && aModifierMask == GetAccessModifierMask(pcContainer)) { // Someone registered an accesskey. Find and activate it. PRBool isTrusted = NS_IS_TRUSTED_EVENT(aEvent); nsAutoTArray accessCharCodes; nsContentUtils::GetAccessKeyCandidates(aEvent, accessCharCodes); if (ExecuteAccessKey(accessCharCodes, isTrusted)) { *aStatus = nsEventStatus_eConsumeNoDefault; return; } } // after the local accesskey handling if (nsEventStatus_eConsumeNoDefault != *aStatus) { // checking all sub docshells nsCOMPtr docShell(do_QueryInterface(pcContainer)); if (!docShell) { NS_WARNING("no docShellTreeNode for presContext"); return; } PRInt32 childCount; docShell->GetChildCount(&childCount); for (PRInt32 counter = 0; counter < childCount; counter++) { // Not processing the child which bubbles up the handling nsCOMPtr subShellItem; docShell->GetChildAt(counter, getter_AddRefs(subShellItem)); if (aAccessKeyState == eAccessKeyProcessingUp && subShellItem == aBubbledFrom) continue; nsCOMPtr subDS = do_QueryInterface(subShellItem); if (subDS && IsShellVisible(subDS)) { nsCOMPtr subPS; subDS->GetPresShell(getter_AddRefs(subPS)); // Docshells need not have a presshell (eg. display:none // iframes, docshells in transition between documents, etc). if (!subPS) { // Oh, well. Just move on to the next child continue; } nsPresContext *subPC = subPS->GetPresContext(); nsEventStateManager* esm = static_cast(subPC->EventStateManager()); if (esm) esm->HandleAccessKey(subPC, aEvent, aStatus, nsnull, eAccessKeyProcessingDown, aModifierMask); if (nsEventStatus_eConsumeNoDefault == *aStatus) break; } } }// if end . checking all sub docshell ends here. // bubble up the process to the parent docshell if necessary if (eAccessKeyProcessingDown != aAccessKeyState && nsEventStatus_eConsumeNoDefault != *aStatus) { nsCOMPtr docShell(do_QueryInterface(pcContainer)); if (!docShell) { NS_WARNING("no docShellTreeItem for presContext"); return; } nsCOMPtr parentShellItem; docShell->GetParent(getter_AddRefs(parentShellItem)); nsCOMPtr parentDS = do_QueryInterface(parentShellItem); if (parentDS) { nsCOMPtr parentPS; parentDS->GetPresShell(getter_AddRefs(parentPS)); NS_ASSERTION(parentPS, "Our PresShell exists but the parent's does not?"); nsPresContext *parentPC = parentPS->GetPresContext(); NS_ASSERTION(parentPC, "PresShell without PresContext"); nsEventStateManager* esm = static_cast(parentPC->EventStateManager()); if (esm) esm->HandleAccessKey(parentPC, aEvent, aStatus, docShell, eAccessKeyProcessingUp, aModifierMask); } }// if end. bubble up process }// end of HandleAccessKey // // CreateClickHoldTimer // // Fire off a timer for determining if the user wants click-hold. This timer // is a one-shot that will be cancelled when the user moves enough to fire // a drag. // void nsEventStateManager::CreateClickHoldTimer(nsPresContext* inPresContext, nsIFrame* inDownFrame, nsGUIEvent* inMouseDownEvent) { if (!NS_IS_TRUSTED_EVENT(inMouseDownEvent)) return; // just to be anal (er, safe) if (mClickHoldTimer) { mClickHoldTimer->Cancel(); mClickHoldTimer = nsnull; } // if content clicked on has a popup, don't even start the timer // since we'll end up conflicting and both will show. if (mGestureDownContent) { // check for the |popup| attribute if (nsContentUtils::HasNonEmptyAttr(mGestureDownContent, kNameSpaceID_None, nsGkAtoms::popup)) return; // check for a like bookmarks if (mGestureDownContent->Tag() == nsGkAtoms::menubutton) return; } mClickHoldTimer = do_CreateInstance("@mozilla.org/timer;1"); if (mClickHoldTimer) { PRInt32 clickHoldDelay = Preferences::GetInt("ui.click_hold_context_menus.delay", 500); mClickHoldTimer->InitWithFuncCallback(sClickHoldCallback, this, clickHoldDelay, nsITimer::TYPE_ONE_SHOT); } } // CreateClickHoldTimer // // KillClickHoldTimer // // Stop the timer that would show the context menu dead in its tracks // void nsEventStateManager::KillClickHoldTimer() { if (mClickHoldTimer) { mClickHoldTimer->Cancel(); mClickHoldTimer = nsnull; } } // // sClickHoldCallback // // This fires after the mouse has been down for a certain length of time. // void nsEventStateManager::sClickHoldCallback(nsITimer *aTimer, void* aESM) { nsEventStateManager* self = static_cast(aESM); if (self) self->FireContextClick(); // NOTE: |aTimer| and |self->mAutoHideTimer| are invalid after calling ClosePopup(); } // sAutoHideCallback // // FireContextClick // // If we're this far, our timer has fired, which means the mouse has been down // for a certain period of time and has not moved enough to generate a dragGesture. // We can be certain the user wants a context-click at this stage, so generate // a dom event and fire it in. // // After the event fires, check if PreventDefault() has been set on the event which // means that someone either ate the event or put up a context menu. This is our cue // to stop tracking the drag gesture. If we always did this, draggable items w/out // a context menu wouldn't be draggable after a certain length of time, which is // _not_ what we want. // void nsEventStateManager::FireContextClick() { if (!mGestureDownContent) return; #ifdef XP_MACOSX // Hack to ensure that we don't show a context menu when the user // let go of the mouse after a long cpu-hogging operation prevented // us from handling any OS events. See bug 117589. if (!CGEventSourceButtonState(kCGEventSourceStateCombinedSessionState, kCGMouseButtonLeft)) return; #endif nsEventStatus status = nsEventStatus_eIgnore; // Dispatch to the DOM. We have to fake out the ESM and tell it that the // current target frame is actually where the mouseDown occurred, otherwise it // will use the frame the mouse is currently over which may or may not be // the same. (Note: saari and I have decided that we don't have to reset |mCurrentTarget| // when we're through because no one else is doing anything more with this // event and it will get reset on the very next event to the correct frame). mCurrentTarget = mPresContext->GetPrimaryFrameFor(mGestureDownContent); if (mCurrentTarget) { NS_ASSERTION(mPresContext == mCurrentTarget->PresContext(), "a prescontext returned a primary frame that didn't belong to it?"); // before dispatching, check that we're not on something that // doesn't get a context menu nsIAtom *tag = mGestureDownContent->Tag(); PRBool allowedToDispatch = PR_TRUE; if (mGestureDownContent->IsXUL()) { if (tag == nsGkAtoms::scrollbar || tag == nsGkAtoms::scrollbarbutton || tag == nsGkAtoms::button) allowedToDispatch = PR_FALSE; else if (tag == nsGkAtoms::toolbarbutton) { // a that has the container attribute set // will already have its own dropdown. if (nsContentUtils::HasNonEmptyAttr(mGestureDownContent, kNameSpaceID_None, nsGkAtoms::container)) { allowedToDispatch = PR_FALSE; } else { // If the toolbar button has an open menu, don't attempt to open // a second menu if (mGestureDownContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::open, nsGkAtoms::_true, eCaseMatters)) { allowedToDispatch = PR_FALSE; } } } } else if (mGestureDownContent->IsHTML()) { nsCOMPtr formCtrl(do_QueryInterface(mGestureDownContent)); if (formCtrl) { // of all form controls, only ones dealing with text are // allowed to have context menus PRInt32 type = formCtrl->GetType(); allowedToDispatch = (type == NS_FORM_INPUT_TEXT || type == NS_FORM_INPUT_EMAIL || type == NS_FORM_INPUT_SEARCH || type == NS_FORM_INPUT_TEL || type == NS_FORM_INPUT_URL || type == NS_FORM_INPUT_PASSWORD || type == NS_FORM_INPUT_FILE || type == NS_FORM_TEXTAREA); } else if (tag == nsGkAtoms::applet || tag == nsGkAtoms::embed || tag == nsGkAtoms::object) { allowedToDispatch = PR_FALSE; } } if (allowedToDispatch) { // make sure the widget sticks around nsCOMPtr targetWidget(mCurrentTarget->GetNearestWidget()); // init the event while mCurrentTarget is still good nsMouseEvent event(PR_TRUE, NS_CONTEXTMENU, targetWidget, nsMouseEvent::eReal); event.clickCount = 1; FillInEventFromGestureDown(&event); // stop selection tracking, we're in control now if (mCurrentTarget) { nsRefPtr frameSel = mCurrentTarget->GetFrameSelection(); if (frameSel && frameSel->GetMouseDownState()) { // note that this can cause selection changed events to fire if we're in // a text field, which will null out mCurrentTarget frameSel->SetMouseDownState(PR_FALSE); } } // dispatch to DOM nsEventDispatcher::Dispatch(mGestureDownContent, mPresContext, &event, nsnull, &status); // We don't need to dispatch to frame handling because no frames // watch NS_CONTEXTMENU except for nsMenuFrame and that's only for // dismissal. That's just as well since we don't really know // which frame to send it to. } } // now check if the event has been handled. If so, stop tracking a drag if (status == nsEventStatus_eConsumeNoDefault) { StopTrackingDragGesture(); } KillClickHoldTimer(); } // FireContextClick // // BeginTrackingDragGesture // // Record that the mouse has gone down and that we should move to TRACKING state // of d&d gesture tracker. // // We also use this to track click-hold context menus. When the mouse goes down, // fire off a short timer. If the timer goes off and we have yet to fire the // drag gesture (ie, the mouse hasn't moved a certain distance), then we can // assume the user wants a click-hold, so fire a context-click event. We only // want to cancel the drag gesture if the context-click event is handled. // void nsEventStateManager::BeginTrackingDragGesture(nsPresContext* aPresContext, nsMouseEvent* inDownEvent, nsIFrame* inDownFrame) { if (!inDownEvent->widget) return; // Note that |inDownEvent| could be either a mouse down event or a // synthesized mouse move event. mGestureDownPoint = inDownEvent->refPoint + inDownEvent->widget->WidgetToScreenOffset(); inDownFrame->GetContentForEvent(aPresContext, inDownEvent, getter_AddRefs(mGestureDownContent)); mGestureDownFrameOwner = inDownFrame->GetContent(); mGestureDownShift = inDownEvent->isShift; mGestureDownControl = inDownEvent->isControl; mGestureDownAlt = inDownEvent->isAlt; mGestureDownMeta = inDownEvent->isMeta; if (mClickHoldContextMenu) { // fire off a timer to track click-hold CreateClickHoldTimer(aPresContext, inDownFrame, inDownEvent); } } // // StopTrackingDragGesture // // Record that the mouse has gone back up so that we should leave the TRACKING // state of d&d gesture tracker and return to the START state. // void nsEventStateManager::StopTrackingDragGesture() { mGestureDownContent = nsnull; mGestureDownFrameOwner = nsnull; } void nsEventStateManager::FillInEventFromGestureDown(nsMouseEvent* aEvent) { NS_ASSERTION(aEvent->widget == mCurrentTarget->GetNearestWidget(), "Incorrect widget in event"); // Set the coordinates in the new event to the coordinates of // the old event, adjusted for the fact that the widget might be // different nsIntPoint tmpPoint = aEvent->widget->WidgetToScreenOffset(); aEvent->refPoint = mGestureDownPoint - tmpPoint; aEvent->isShift = mGestureDownShift; aEvent->isControl = mGestureDownControl; aEvent->isAlt = mGestureDownAlt; aEvent->isMeta = mGestureDownMeta; } // // GenerateDragGesture // // If we're in the TRACKING state of the d&d gesture tracker, check the current position // of the mouse in relation to the old one. If we've moved a sufficient amount from // the mouse down, then fire off a drag gesture event. void nsEventStateManager::GenerateDragGesture(nsPresContext* aPresContext, nsMouseEvent *aEvent) { NS_ASSERTION(aPresContext, "This shouldn't happen."); if (IsTrackingDragGesture()) { mCurrentTarget = mGestureDownFrameOwner->GetPrimaryFrame(); if (!mCurrentTarget) { StopTrackingDragGesture(); return; } // Check if selection is tracking drag gestures, if so // don't interfere! if (mCurrentTarget) { nsRefPtr frameSel = mCurrentTarget->GetFrameSelection(); if (frameSel && frameSel->GetMouseDownState()) { StopTrackingDragGesture(); return; } } // If non-native code is capturing the mouse don't start a drag. if (nsIPresShell::IsMouseCapturePreventingDrag()) { StopTrackingDragGesture(); return; } static PRInt32 pixelThresholdX = 0; static PRInt32 pixelThresholdY = 0; if (!pixelThresholdX) { nsILookAndFeel *lf = aPresContext->LookAndFeel(); lf->GetMetric(nsILookAndFeel::eMetric_DragThresholdX, pixelThresholdX); lf->GetMetric(nsILookAndFeel::eMetric_DragThresholdY, pixelThresholdY); if (!pixelThresholdX) pixelThresholdX = 5; if (!pixelThresholdY) pixelThresholdY = 5; } // fire drag gesture if mouse has moved enough nsIntPoint pt = aEvent->refPoint + aEvent->widget->WidgetToScreenOffset(); if (NS_ABS(pt.x - mGestureDownPoint.x) > pixelThresholdX || NS_ABS(pt.y - mGestureDownPoint.y) > pixelThresholdY) { if (mClickHoldContextMenu) { // stop the click-hold before we fire off the drag gesture, in case // it takes a long time KillClickHoldTimer(); } nsRefPtr dataTransfer = new nsDOMDataTransfer(); if (!dataTransfer) return; PRBool isInEditor = PR_FALSE; PRBool isSelection = PR_FALSE; nsCOMPtr eventContent, targetContent; mCurrentTarget->GetContentForEvent(aPresContext, aEvent, getter_AddRefs(eventContent)); if (eventContent) DetermineDragTarget(aPresContext, eventContent, dataTransfer, &isSelection, &isInEditor, getter_AddRefs(targetContent)); // Stop tracking the drag gesture now. This should stop us from // reentering GenerateDragGesture inside DOM event processing. StopTrackingDragGesture(); if (!targetContent) return; nsCOMPtr widget = mCurrentTarget->GetNearestWidget(); // get the widget from the target frame nsDragEvent startEvent(NS_IS_TRUSTED_EVENT(aEvent), NS_DRAGDROP_START, widget); FillInEventFromGestureDown(&startEvent); nsDragEvent gestureEvent(NS_IS_TRUSTED_EVENT(aEvent), NS_DRAGDROP_GESTURE, widget); FillInEventFromGestureDown(&gestureEvent); startEvent.dataTransfer = gestureEvent.dataTransfer = dataTransfer; startEvent.inputSource = gestureEvent.inputSource = aEvent->inputSource; // Dispatch to the DOM. By setting mCurrentTarget we are faking // out the ESM and telling it that the current target frame is // actually where the mouseDown occurred, otherwise it will use // the frame the mouse is currently over which may or may not be // the same. (Note: saari and I have decided that we don't have // to reset |mCurrentTarget| when we're through because no one // else is doing anything more with this event and it will get // reset on the very next event to the correct frame). // Hold onto old target content through the event and reset after. nsCOMPtr targetBeforeEvent = mCurrentTargetContent; // Set the current target to the content for the mouse down mCurrentTargetContent = targetContent; // Dispatch both the dragstart and draggesture events to the DOM. For // elements in an editor, only fire the draggesture event so that the // editor code can handle it but content doesn't see a dragstart. nsEventStatus status = nsEventStatus_eIgnore; if (!isInEditor) nsEventDispatcher::Dispatch(targetContent, aPresContext, &startEvent, nsnull, &status); nsDragEvent* event = &startEvent; if (status != nsEventStatus_eConsumeNoDefault) { status = nsEventStatus_eIgnore; nsEventDispatcher::Dispatch(targetContent, aPresContext, &gestureEvent, nsnull, &status); event = &gestureEvent; } // now that the dataTransfer has been updated in the dragstart and // draggesture events, make it read only so that the data doesn't // change during the drag. dataTransfer->SetReadOnly(); if (status != nsEventStatus_eConsumeNoDefault) { PRBool dragStarted = DoDefaultDragStart(aPresContext, event, dataTransfer, targetContent, isSelection); if (dragStarted) { sActiveESM = nsnull; aEvent->flags |= NS_EVENT_FLAG_STOP_DISPATCH; } } // Note that frame event handling doesn't care about NS_DRAGDROP_GESTURE, // which is just as well since we don't really know which frame to // send it to // Reset mCurretTargetContent to what it was mCurrentTargetContent = targetBeforeEvent; } // Now flush all pending notifications, for better responsiveness // while dragging. FlushPendingEvents(aPresContext); } } // GenerateDragGesture void nsEventStateManager::DetermineDragTarget(nsPresContext* aPresContext, nsIContent* aSelectionTarget, nsDOMDataTransfer* aDataTransfer, PRBool* aIsSelection, PRBool* aIsInEditor, nsIContent** aTargetNode) { *aTargetNode = nsnull; *aIsInEditor = PR_FALSE; nsCOMPtr container = aPresContext->GetContainer(); nsCOMPtr window = do_GetInterface(container); // GetDragData determines if a selection, link or image in the content // should be dragged, and places the data associated with the drag in the // data transfer. Skip this check for chrome shells. PRBool canDrag; nsCOMPtr dragDataNode; nsCOMPtr dsti = do_QueryInterface(container); if (dsti) { PRInt32 type = -1; if (NS_SUCCEEDED(dsti->GetItemType(&type)) && type != nsIDocShellTreeItem::typeChrome) { // mGestureDownContent is the node where the mousedown event for the drag // occurred, and aSelectionTarget is the node to use when a selection is used nsresult rv = nsContentAreaDragDrop::GetDragData(window, mGestureDownContent, aSelectionTarget, mGestureDownAlt, aDataTransfer, &canDrag, aIsSelection, getter_AddRefs(dragDataNode)); if (NS_FAILED(rv) || !canDrag) return; } } // if GetDragData returned a node, use that as the node being dragged. // Otherwise, if a selection is being dragged, use the node within the // selection that was dragged. Otherwise, just use the mousedown target. nsIContent* dragContent = mGestureDownContent; if (dragDataNode) dragContent = dragDataNode; else if (*aIsSelection) dragContent = aSelectionTarget; nsIContent* originalDragContent = dragContent; // If a selection isn't being dragged, look for an ancestor with the // draggable property set. If one is found, use that as the target of the // drag instead of the node that was clicked on. If a draggable node wasn't // found, just use the clicked node. if (!*aIsSelection) { while (dragContent) { nsCOMPtr htmlElement = do_QueryInterface(dragContent); if (htmlElement) { PRBool draggable = PR_FALSE; htmlElement->GetDraggable(&draggable); if (draggable) break; } else { nsCOMPtr xulElement = do_QueryInterface(dragContent); if (xulElement) { // All XUL elements are draggable, so if a XUL element is // encountered, stop looking for draggable nodes and just use the // original clicked node instead. // XXXndeakin // In the future, we will want to improve this so that XUL has a // better way to specify whether something is draggable than just // on/off. dragContent = mGestureDownContent; break; } // otherwise, it's not an HTML or XUL element, so just keep looking } dragContent = dragContent->GetParent(); // if an editable parent is encountered, then we don't look at any // ancestors. This is used because the editor attaches a draggesture // listener to the editable element and we want to call it without // making the editable element draggable. This should be removed once // the editor is switched over to using the proper drag and drop api. nsCOMPtr editableElement = do_QueryInterface(dragContent); if (editableElement) { *aIsInEditor = PR_TRUE; break; } } } // if no node in the hierarchy was found to drag, but the GetDragData method // returned a node, use that returned node. Otherwise, nothing is draggable. if (!dragContent && dragDataNode) dragContent = dragDataNode; if (dragContent) { // if an ancestor node was used instead, clear the drag data // XXXndeakin rework this a bit. Find a way to just not call GetDragData if we don't need to. if (dragContent != originalDragContent) aDataTransfer->ClearAll(); *aTargetNode = dragContent; NS_ADDREF(*aTargetNode); } } PRBool nsEventStateManager::DoDefaultDragStart(nsPresContext* aPresContext, nsDragEvent* aDragEvent, nsDOMDataTransfer* aDataTransfer, nsIContent* aDragTarget, PRBool aIsSelection) { nsCOMPtr dragService = do_GetService("@mozilla.org/widget/dragservice;1"); if (!dragService) return PR_FALSE; // Default handling for the draggesture/dragstart event. // // First, check if a drag session already exists. This means that the drag // service was called directly within a draggesture handler. In this case, // don't do anything more, as it is assumed that the handler is managing // drag and drop manually. Make sure to return true to indicate that a drag // began. nsCOMPtr dragSession; dragService->GetCurrentSession(getter_AddRefs(dragSession)); if (dragSession) return PR_TRUE; // No drag session is currently active, so check if a handler added // any items to be dragged. If not, there isn't anything to drag. PRUint32 count = 0; if (aDataTransfer) aDataTransfer->GetMozItemCount(&count); if (!count) return PR_FALSE; // Get the target being dragged, which may not be the same as the // target of the mouse event. If one wasn't set in the // aDataTransfer during the event handler, just use the original // target instead. nsCOMPtr dragTarget; nsCOMPtr dragTargetElement; aDataTransfer->GetDragTarget(getter_AddRefs(dragTargetElement)); dragTarget = do_QueryInterface(dragTargetElement); if (!dragTarget) { dragTarget = do_QueryInterface(aDragTarget); if (!dragTarget) return PR_FALSE; } // check which drag effect should initially be used. If the effect was not // set, just use all actions, otherwise Windows won't allow a drop. PRUint32 action; aDataTransfer->GetEffectAllowedInt(&action); if (action == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED) action = nsIDragService::DRAGDROP_ACTION_COPY | nsIDragService::DRAGDROP_ACTION_MOVE | nsIDragService::DRAGDROP_ACTION_LINK; // get any custom drag image that was set PRInt32 imageX, imageY; nsIDOMElement* dragImage = aDataTransfer->GetDragImage(&imageX, &imageY); // If a selection is being dragged, and no custom drag image was // set, get the selection so that the drag region can be created // from the selection area. If a custom image was set, it doesn't // matter what the selection is since the image will be used instead. nsISelection* selection = nsnull; if (aIsSelection && !dragImage) { nsIDocument* doc = aDragTarget->GetCurrentDoc(); if (doc) { nsIPresShell* presShell = doc->GetShell(); if (presShell) { selection = presShell->GetCurrentSelection( nsISelectionController::SELECTION_NORMAL); } } } nsCOMPtr transArray; aDataTransfer->GetTransferables(getter_AddRefs(transArray)); if (!transArray) return PR_FALSE; // XXXndeakin don't really want to create a new drag DOM event // here, but we need something to pass to the InvokeDragSession // methods. nsCOMPtr domEvent; NS_NewDOMDragEvent(getter_AddRefs(domEvent), aPresContext, aDragEvent); nsCOMPtr domDragEvent = do_QueryInterface(domEvent); // if creating a drag event failed, starting a drag session will // just fail. if (selection) { dragService->InvokeDragSessionWithSelection(selection, transArray, action, domDragEvent, aDataTransfer); } else { // if dragging within a XUL tree and no custom drag image was // set, the region argument to InvokeDragSessionWithImage needs // to be set to the area encompassing the selected rows of the // tree to ensure that the drag feedback gets clipped to those // rows. For other content, region should be null. nsCOMPtr region; #ifdef MOZ_XUL if (dragTarget && !dragImage) { nsCOMPtr content = do_QueryInterface(dragTarget); if (content->NodeInfo()->Equals(nsGkAtoms::treechildren, kNameSpaceID_XUL)) { nsTreeBodyFrame* treeBody = do_QueryFrame(content->GetPrimaryFrame()); if (treeBody) { treeBody->GetSelectionRegion(getter_AddRefs(region)); } } } #endif dragService->InvokeDragSessionWithImage(dragTarget, transArray, region, action, dragImage, imageX, imageY, domDragEvent, aDataTransfer); } return PR_TRUE; } nsresult nsEventStateManager::GetMarkupDocumentViewer(nsIMarkupDocumentViewer** aMv) { *aMv = nsnull; nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if(!fm) return NS_ERROR_FAILURE; nsCOMPtr focusedWindow; fm->GetFocusedWindow(getter_AddRefs(focusedWindow)); nsCOMPtr ourWindow = do_QueryInterface(focusedWindow); if(!ourWindow) return NS_ERROR_FAILURE; nsIDOMWindowInternal *rootWindow = ourWindow->GetPrivateRoot(); if(!rootWindow) return NS_ERROR_FAILURE; nsCOMPtr contentWindow; rootWindow->GetContent(getter_AddRefs(contentWindow)); if(!contentWindow) return NS_ERROR_FAILURE; nsIDocument *doc = GetDocumentFromWindow(contentWindow); if(!doc) return NS_ERROR_FAILURE; nsIPresShell *presShell = doc->GetShell(); if(!presShell) return NS_ERROR_FAILURE; nsPresContext *presContext = presShell->GetPresContext(); if(!presContext) return NS_ERROR_FAILURE; nsCOMPtr pcContainer = presContext->GetContainer(); if(!pcContainer) return NS_ERROR_FAILURE; nsCOMPtr docshell(do_QueryInterface(pcContainer)); if(!docshell) return NS_ERROR_FAILURE; nsCOMPtr cv; docshell->GetContentViewer(getter_AddRefs(cv)); if(!cv) return NS_ERROR_FAILURE; nsCOMPtr mv(do_QueryInterface(cv)); if(!mv) return NS_ERROR_FAILURE; *aMv = mv; NS_IF_ADDREF(*aMv); return NS_OK; } nsresult nsEventStateManager::ChangeTextSize(PRInt32 change) { nsCOMPtr mv; nsresult rv = GetMarkupDocumentViewer(getter_AddRefs(mv)); NS_ENSURE_SUCCESS(rv, rv); float textzoom; float zoomMin = ((float)Preferences::GetInt("zoom.minPercent", 50)) / 100; float zoomMax = ((float)Preferences::GetInt("zoom.maxPercent", 300)) / 100; mv->GetTextZoom(&textzoom); textzoom += ((float)change) / 10; if (textzoom < zoomMin) textzoom = zoomMin; else if (textzoom > zoomMax) textzoom = zoomMax; mv->SetTextZoom(textzoom); return NS_OK; } nsresult nsEventStateManager::ChangeFullZoom(PRInt32 change) { nsCOMPtr mv; nsresult rv = GetMarkupDocumentViewer(getter_AddRefs(mv)); NS_ENSURE_SUCCESS(rv, rv); float fullzoom; float zoomMin = ((float)Preferences::GetInt("zoom.minPercent", 50)) / 100; float zoomMax = ((float)Preferences::GetInt("zoom.maxPercent", 300)) / 100; mv->GetFullZoom(&fullzoom); fullzoom += ((float)change) / 10; if (fullzoom < zoomMin) fullzoom = zoomMin; else if (fullzoom > zoomMax) fullzoom = zoomMax; mv->SetFullZoom(fullzoom); return NS_OK; } void nsEventStateManager::DoScrollHistory(PRInt32 direction) { nsCOMPtr pcContainer(mPresContext->GetContainer()); if (pcContainer) { nsCOMPtr webNav(do_QueryInterface(pcContainer)); if (webNav) { // positive direction to go back one step, nonpositive to go forward if (direction > 0) webNav->GoBack(); else webNav->GoForward(); } } } void nsEventStateManager::DoScrollZoom(nsIFrame *aTargetFrame, PRInt32 adjustment) { // Exclude form controls and XUL content. nsIContent *content = aTargetFrame->GetContent(); if (content && !content->IsNodeOfType(nsINode::eHTML_FORM_CONTROL) && !content->IsXUL()) { // positive adjustment to decrease zoom, negative to increase PRInt32 change = (adjustment > 0) ? -1 : 1; if (Preferences::GetBool("browser.zoom.full")) { ChangeFullZoom(change); } else { ChangeTextSize(change); } } } static nsIFrame* GetParentFrameToScroll(nsIFrame* aFrame) { if (!aFrame) return nsnull; if (aFrame->GetStyleDisplay()->mPosition == NS_STYLE_POSITION_FIXED && nsLayoutUtils::IsReallyFixedPos(aFrame)) return aFrame->PresContext()->GetPresShell()->GetRootScrollFrame(); return aFrame->GetParent(); } static nscoord GetScrollableLineHeight(nsIFrame* aTargetFrame) { for (nsIFrame* f = aTargetFrame; f; f = GetParentFrameToScroll(f)) { nsIScrollableFrame* sf = f->GetScrollTargetFrame(); if (sf) return sf->GetLineScrollAmount().height; } // Fall back to the font height of the target frame. const nsStyleFont* font = aTargetFrame->GetStyleFont(); const nsFont& f = font->mFont; nsRefPtr fm = aTargetFrame->PresContext()->GetMetricsFor(f); NS_ASSERTION(fm, "FontMetrics is null!"); if (fm) return fm->MaxHeight(); return 0; } void nsEventStateManager::SendLineScrollEvent(nsIFrame* aTargetFrame, nsMouseScrollEvent* aEvent, nsPresContext* aPresContext, nsEventStatus* aStatus, PRInt32 aNumLines) { nsCOMPtr targetContent = aTargetFrame->GetContent(); if (!targetContent) targetContent = GetFocusedContent(); if (!targetContent) return; while (targetContent->IsNodeOfType(nsINode::eTEXT)) { targetContent = targetContent->GetParent(); } PRBool isTrusted = (aEvent->flags & NS_EVENT_FLAG_TRUSTED) != 0; nsMouseScrollEvent event(isTrusted, NS_MOUSE_SCROLL, nsnull); event.refPoint = aEvent->refPoint; event.widget = aEvent->widget; event.time = aEvent->time; event.isShift = aEvent->isShift; event.isControl = aEvent->isControl; event.isAlt = aEvent->isAlt; event.isMeta = aEvent->isMeta; event.scrollFlags = aEvent->scrollFlags; event.delta = aNumLines; event.inputSource = static_cast(aEvent)->inputSource; nsEventDispatcher::Dispatch(targetContent, aPresContext, &event, nsnull, aStatus); } void nsEventStateManager::SendPixelScrollEvent(nsIFrame* aTargetFrame, nsMouseScrollEvent* aEvent, nsPresContext* aPresContext, nsEventStatus* aStatus) { nsCOMPtr targetContent = aTargetFrame->GetContent(); if (!targetContent) { targetContent = GetFocusedContent(); if (!targetContent) return; } while (targetContent->IsNodeOfType(nsINode::eTEXT)) { targetContent = targetContent->GetParent(); } nscoord lineHeight = GetScrollableLineHeight(aTargetFrame); PRBool isTrusted = (aEvent->flags & NS_EVENT_FLAG_TRUSTED) != 0; nsMouseScrollEvent event(isTrusted, NS_MOUSE_PIXEL_SCROLL, nsnull); event.refPoint = aEvent->refPoint; event.widget = aEvent->widget; event.time = aEvent->time; event.isShift = aEvent->isShift; event.isControl = aEvent->isControl; event.isAlt = aEvent->isAlt; event.isMeta = aEvent->isMeta; event.scrollFlags = aEvent->scrollFlags; event.inputSource = static_cast(aEvent)->inputSource; event.delta = aPresContext->AppUnitsToIntCSSPixels(aEvent->delta * lineHeight); nsEventDispatcher::Dispatch(targetContent, aPresContext, &event, nsnull, aStatus); } PRInt32 nsEventStateManager::ComputeWheelActionFor(nsMouseScrollEvent* aMouseEvent, PRBool aUseSystemSettings) { PRInt32 action = GetWheelActionFor(aMouseEvent); if (aUseSystemSettings && (aMouseEvent->scrollFlags & nsMouseScrollEvent::kIsFullPage)) { action = MOUSE_SCROLL_PAGE; } if (aMouseEvent->message == NS_MOUSE_PIXEL_SCROLL) { if (action == MOUSE_SCROLL_N_LINES || action == MOUSE_SCROLL_PAGE || (aMouseEvent->scrollFlags & nsMouseScrollEvent::kIsMomentum)) { action = MOUSE_SCROLL_PIXELS; } else { // Do not scroll pixels when zooming action = -1; } } else if (aMouseEvent->scrollFlags & nsMouseScrollEvent::kHasPixels) { if (aUseSystemSettings || action == MOUSE_SCROLL_N_LINES || action == MOUSE_SCROLL_PAGE || (aMouseEvent->scrollFlags & nsMouseScrollEvent::kIsMomentum)) { // Don't scroll lines when a pixel scroll event will follow. // Also, don't do history scrolling or zooming for momentum scrolls. action = -1; } } return action; } PRInt32 nsEventStateManager::GetWheelActionFor(nsMouseScrollEvent* aMouseEvent) { nsCAutoString prefName; GetBasePrefKeyForMouseWheel(aMouseEvent, prefName); prefName.Append(".action"); return Preferences::GetInt(prefName.get()); } PRInt32 nsEventStateManager::GetScrollLinesFor(nsMouseScrollEvent* aMouseEvent) { NS_ASSERTION(!UseSystemScrollSettingFor(aMouseEvent), "GetScrollLinesFor() called when should use system settings"); nsCAutoString prefName; GetBasePrefKeyForMouseWheel(aMouseEvent, prefName); prefName.Append(".numlines"); return Preferences::GetInt(prefName.get()); } PRBool nsEventStateManager::UseSystemScrollSettingFor(nsMouseScrollEvent* aMouseEvent) { nsCAutoString prefName; GetBasePrefKeyForMouseWheel(aMouseEvent, prefName); prefName.Append(".sysnumlines"); return Preferences::GetBool(prefName.get()); } nsresult nsEventStateManager::DoScrollText(nsIFrame* aTargetFrame, nsMouseScrollEvent* aMouseEvent, nsIScrollableFrame::ScrollUnit aScrollQuantity, PRBool aAllowScrollSpeedOverride, nsQueryContentEvent* aQueryEvent) { nsIScrollableFrame* frameToScroll = nsnull; nsIFrame* scrollFrame = aTargetFrame; PRInt32 numLines = aMouseEvent->delta; PRBool isHorizontal = aMouseEvent->scrollFlags & nsMouseScrollEvent::kIsHorizontal; aMouseEvent->scrollOverflow = 0; // If the user recently scrolled with the mousewheel, then they probably want // to scroll the same view as before instead of the view under the cursor. // nsMouseWheelTransaction tracks the frame currently being scrolled with the // mousewheel. We consider the transaction ended when the mouse moves more than // "mousewheel.transaction.ignoremovedelay" milliseconds after the last scroll // operation, or any time the mouse moves out of the frame, or when more than // "mousewheel.transaction.timeout" milliseconds have passed after the last // operation, even if the mouse hasn't moved. nsIFrame* lastScrollFrame = nsMouseWheelTransaction::GetTargetFrame(); if (lastScrollFrame) { frameToScroll = lastScrollFrame->GetScrollTargetFrame(); if (frameToScroll) { nsMouseWheelTransaction::UpdateTransaction(numLines, isHorizontal); // When the scroll event will not scroll any views, UpdateTransaction // fired MozMouseScrollFailed event which is for automated testing. // In the event handler, the target frame might be destroyed. Then, // we should not keep handling this scroll event. if (!nsMouseWheelTransaction::GetTargetFrame()) return NS_OK; } else { nsMouseWheelTransaction::EndTransaction(); lastScrollFrame = nsnull; } } PRBool passToParent = lastScrollFrame ? PR_FALSE : PR_TRUE; for (; scrollFrame && passToParent; scrollFrame = GetParentFrameToScroll(scrollFrame)) { // Check whether the frame wants to provide us with a scrollable view. frameToScroll = scrollFrame->GetScrollTargetFrame(); if (!frameToScroll) { continue; } nsPresContext::ScrollbarStyles ss = frameToScroll->GetScrollbarStyles(); if (NS_STYLE_OVERFLOW_HIDDEN == (isHorizontal ? ss.mHorizontal : ss.mVertical)) { continue; } // Check if the scrollable view can be scrolled any further. nscoord lineHeight = frameToScroll->GetLineScrollAmount().height; if (lineHeight != 0) { if (CanScrollOn(frameToScroll, numLines, isHorizontal)) { passToParent = PR_FALSE; nsMouseWheelTransaction::BeginTransaction(scrollFrame, numLines, isHorizontal); } // Comboboxes need special care. nsIComboboxControlFrame* comboBox = do_QueryFrame(scrollFrame); if (comboBox) { if (comboBox->IsDroppedDown()) { // Don't propagate to parent when drop down menu is active. if (passToParent) { passToParent = PR_FALSE; frameToScroll = nsnull; nsMouseWheelTransaction::EndTransaction(); } } else { // Always propagate when not dropped down (even if focused). if (!passToParent) { passToParent = PR_TRUE; nsMouseWheelTransaction::EndTransaction(); } } } } } if (!passToParent && frameToScroll) { if (aScrollQuantity == nsIScrollableFrame::LINES) { // When this is called for querying the scroll target information, // we shouldn't limit the scrolling amount to less one page. // Otherwise, we shouldn't scroll more one page at once. numLines = nsMouseWheelTransaction::AccelerateWheelDelta(numLines, isHorizontal, aAllowScrollSpeedOverride, &aScrollQuantity, !aQueryEvent); } #ifdef DEBUG else { NS_ASSERTION(!aAllowScrollSpeedOverride, "aAllowScrollSpeedOverride is true but the quantity isn't by-line scrolling."); } #endif if (aScrollQuantity == nsIScrollableFrame::PAGES) { numLines = (numLines > 0) ? 1 : -1; } if (aQueryEvent) { // If acceleration is enabled, pixel scroll shouldn't be used for // high resolution scrolling. if (nsMouseWheelTransaction::IsAccelerationEnabled()) { return NS_OK; } nscoord appUnitsPerDevPixel = aTargetFrame->PresContext()->AppUnitsPerDevPixel(); aQueryEvent->mReply.mLineHeight = frameToScroll->GetLineScrollAmount().height / appUnitsPerDevPixel; aQueryEvent->mReply.mPageHeight = frameToScroll->GetPageScrollAmount().height / appUnitsPerDevPixel; aQueryEvent->mReply.mPageWidth = frameToScroll->GetPageScrollAmount().width / appUnitsPerDevPixel; // Returns computed numLines to widget which is needed to compute the // pixel scrolling amout for high resolution scrolling. aQueryEvent->mReply.mComputedScrollAmount = numLines; aQueryEvent->mSucceeded = PR_TRUE; return NS_OK; } PRInt32 scrollX = 0; PRInt32 scrollY = numLines; if (isHorizontal) { scrollX = scrollY; scrollY = 0; } nsIScrollableFrame::ScrollMode mode; if (aMouseEvent->scrollFlags & nsMouseScrollEvent::kNoDefer) { mode = nsIScrollableFrame::INSTANT; } else if (aScrollQuantity != nsIScrollableFrame::DEVICE_PIXELS || (aMouseEvent->scrollFlags & nsMouseScrollEvent::kAllowSmoothScroll) != 0) { mode = nsIScrollableFrame::SMOOTH; } else { mode = nsIScrollableFrame::NORMAL; } // XXX Why don't we limit the pixel scroll amount to less one page?? nsIntPoint overflow; frameToScroll->ScrollBy(nsIntPoint(scrollX, scrollY), aScrollQuantity, mode, &overflow); aMouseEvent->scrollOverflow = isHorizontal ? overflow.x : overflow.y; return NS_OK; } if (passToParent) { nsIFrame* newFrame = nsLayoutUtils::GetCrossDocParentFrame( aTargetFrame->PresContext()->FrameManager()->GetRootFrame()); if (newFrame) return DoScrollText(newFrame, aMouseEvent, aScrollQuantity, aAllowScrollSpeedOverride, aQueryEvent); } aMouseEvent->scrollOverflow = numLines; return NS_OK; } void nsEventStateManager::DecideGestureEvent(nsGestureNotifyEvent* aEvent, nsIFrame* targetFrame) { NS_ASSERTION(aEvent->message == NS_GESTURENOTIFY_EVENT_START, "DecideGestureEvent called with a non-gesture event"); /* Check the ancestor tree to decide if any frame is willing* to receive * a MozPixelScroll event. If that's the case, the current touch gesture * will be used as a pan gesture; otherwise it will be a regular * mousedown/mousemove/click event. * * *willing: determine if it makes sense to pan the element using scroll events: * - For web content: if there are any visible scrollbars on the touch point * - For XUL: if it's an scrollable element that can currently scroll in some * direction. * * Note: we'll have to one-off various cases to ensure a good usable behavior */ nsGestureNotifyEvent::ePanDirection panDirection = nsGestureNotifyEvent::ePanNone; PRBool displayPanFeedback = PR_FALSE; for (nsIFrame* current = targetFrame; current; current = nsLayoutUtils::GetCrossDocParentFrame(current)) { nsIAtom* currentFrameType = current->GetType(); // Scrollbars should always be draggable if (currentFrameType == nsGkAtoms::scrollbarFrame) { panDirection = nsGestureNotifyEvent::ePanNone; break; } #ifdef MOZ_XUL // Special check for trees nsTreeBodyFrame* treeFrame = do_QueryFrame(current); if (treeFrame) { if (treeFrame->GetHorizontalOverflow()) { panDirection = nsGestureNotifyEvent::ePanHorizontal; } if (treeFrame->GetVerticalOverflow()) { panDirection = nsGestureNotifyEvent::ePanVertical; } break; } #endif nsIScrollableFrame* scrollableFrame = do_QueryFrame(current); if (scrollableFrame) { if (current->IsFrameOfType(nsIFrame::eXULBox)) { displayPanFeedback = PR_TRUE; nsRect scrollRange = scrollableFrame->GetScrollRange(); PRBool canScrollHorizontally = scrollRange.width > 0; if (targetFrame->GetType() == nsGkAtoms::menuFrame) { // menu frames report horizontal scroll when they have submenus // and we don't want that canScrollHorizontally = PR_FALSE; displayPanFeedback = PR_FALSE; } // Vertical panning has priority over horizontal panning, so // when vertical movement is possible we can just finish the loop. if (scrollRange.height > 0) { panDirection = nsGestureNotifyEvent::ePanVertical; break; } if (canScrollHorizontally) { panDirection = nsGestureNotifyEvent::ePanHorizontal; displayPanFeedback = PR_FALSE; } } else { //Not a XUL box PRUint32 scrollbarVisibility = scrollableFrame->GetScrollbarVisibility(); //Check if we have visible scrollbars if (scrollbarVisibility & nsIScrollableFrame::VERTICAL) { panDirection = nsGestureNotifyEvent::ePanVertical; displayPanFeedback = PR_TRUE; break; } if (scrollbarVisibility & nsIScrollableFrame::HORIZONTAL) { panDirection = nsGestureNotifyEvent::ePanHorizontal; displayPanFeedback = PR_TRUE; } } } //scrollableFrame } //ancestor chain aEvent->displayPanFeedback = displayPanFeedback; aEvent->panDirection = panDirection; } #ifdef XP_MACOSX static bool NodeAllowsClickThrough(nsINode* aNode) { while (aNode) { if (aNode->IsElement() && aNode->AsElement()->IsXUL()) { mozilla::dom::Element* element = aNode->AsElement(); static nsIContent::AttrValuesArray strings[] = {&nsGkAtoms::always, &nsGkAtoms::never, nsnull}; switch (element->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::clickthrough, strings, eCaseMatters)) { case 0: return true; case 1: return false; } } aNode = nsContentUtils::GetCrossDocParentNode(aNode); } return true; } #endif nsresult nsEventStateManager::PostHandleEvent(nsPresContext* aPresContext, nsEvent *aEvent, nsIFrame* aTargetFrame, nsEventStatus* aStatus, nsIView* aView) { NS_ENSURE_ARG(aPresContext); NS_ENSURE_ARG_POINTER(aStatus); mCurrentTarget = aTargetFrame; mCurrentTargetContent = nsnull; // Most of the events we handle below require a frame. // Add special cases here. if (!mCurrentTarget && aEvent->message != NS_MOUSE_BUTTON_UP && aEvent->message != NS_MOUSE_BUTTON_DOWN) { return NS_OK; } //Keep the prescontext alive, we might need it after event dispatch nsRefPtr presContext = aPresContext; nsresult ret = NS_OK; switch (aEvent->message) { case NS_MOUSE_BUTTON_DOWN: { if (static_cast(aEvent)->button == nsMouseEvent::eLeftButton && !sNormalLMouseEventInProcess) { // We got a mouseup event while a mousedown event was being processed. // Make sure that the capturing content is cleared. nsIPresShell::SetCapturingContent(nsnull, 0); break; } nsCOMPtr activeContent; if (nsEventStatus_eConsumeNoDefault != *aStatus) { nsCOMPtr newFocus; PRBool suppressBlur = PR_FALSE; if (mCurrentTarget) { mCurrentTarget->GetContentForEvent(mPresContext, aEvent, getter_AddRefs(newFocus)); const nsStyleUserInterface* ui = mCurrentTarget->GetStyleUserInterface(); suppressBlur = (ui->mUserFocus == NS_STYLE_USER_FOCUS_IGNORE); activeContent = mCurrentTarget->GetContent(); } nsIFrame* currFrame = mCurrentTarget; // When a root content which isn't editable but has an editable HTML // element is clicked, we should redirect the focus to the // the element. E.g., when an user click bottom of the editor // where is outside of the element, the should be focused // and the user can edit immediately after that. // // NOTE: The newFocus isn't editable that also means it's not in // designMode. In designMode, all contents are not focusable. if (newFocus && !newFocus->IsEditable()) { nsIDocument *doc = newFocus->GetCurrentDoc(); if (doc && newFocus == doc->GetRootElement()) { nsIContent *bodyContent = nsLayoutUtils::GetEditableRootContentByContentEditable(doc); if (bodyContent) { nsIFrame* bodyFrame = bodyContent->GetPrimaryFrame(); if (bodyFrame) { currFrame = bodyFrame; newFocus = bodyContent; } } } } // When the mouse is pressed, the default action is to focus the // target. Look for the nearest enclosing focusable frame. while (currFrame) { // If the mousedown happened inside a popup, don't // try to set focus on one of its containing elements const nsStyleDisplay* display = currFrame->GetStyleDisplay(); if (display->mDisplay == NS_STYLE_DISPLAY_POPUP) { newFocus = nsnull; break; } PRInt32 tabIndexUnused; if (currFrame->IsFocusable(&tabIndexUnused, PR_TRUE)) { newFocus = currFrame->GetContent(); nsCOMPtr domElement(do_QueryInterface(newFocus)); if (domElement) break; } currFrame = currFrame->GetParent(); } nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (fm) { // if something was found to focus, focus it. Otherwise, if the // element that was clicked doesn't have -moz-user-focus: ignore, // clear the existing focus. For -moz-user-focus: ignore, the focus // is just left as is. // Another effect of mouse clicking, handled in nsSelection, is that // it should update the caret position to where the mouse was // clicked. Because the focus is cleared when clicking on a // non-focusable node, the next press of the tab key will cause // focus to be shifted from the caret position instead of the root. if (newFocus && currFrame) { // use the mouse flag and the noscroll flag so that the content // doesn't unexpectedly scroll when clicking an element that is // only hald visible nsCOMPtr newFocusElement = do_QueryInterface(newFocus); fm->SetFocus(newFocusElement, nsIFocusManager::FLAG_BYMOUSE | nsIFocusManager::FLAG_NOSCROLL); } else if (!suppressBlur) { // clear the focus within the frame and then set it as the // focused frame EnsureDocument(mPresContext); if (mDocument) { #ifdef XP_MACOSX if (!activeContent || !activeContent->IsXUL()) #endif fm->ClearFocus(mDocument->GetWindow()); fm->SetFocusedWindow(mDocument->GetWindow()); } } } // The rest is left button-specific. if (static_cast(aEvent)->button != nsMouseEvent::eLeftButton) break; if (activeContent) { // The nearest enclosing element goes into the // :active state. If we fail the QI to DOMElement, // then we know we're only a node, and that we need // to obtain our parent element and put it into :active // instead. nsCOMPtr elt(do_QueryInterface(activeContent)); if (!elt) { nsIContent* par = activeContent->GetParent(); if (par) activeContent = par; } } } else { // if we're here, the event handler returned false, so stop // any of our own processing of a drag. Workaround for bug 43258. StopTrackingDragGesture(); // When the event was cancelled, there is currently a chrome document // focused and a mousedown just occurred on a content document, ensure // that the window that was clicked is focused. EnsureDocument(mPresContext); nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (mDocument && fm) { nsCOMPtr currentWindow; fm->GetFocusedWindow(getter_AddRefs(currentWindow)); if (currentWindow && currentWindow != mDocument->GetWindow() && !nsContentUtils::IsChromeDoc(mDocument)) { nsCOMPtr win = do_QueryInterface(currentWindow); nsCOMPtr currentDoc = do_QueryInterface(win->GetExtantDocument()); if (nsContentUtils::IsChromeDoc(currentDoc)) { fm->SetFocusedWindow(mDocument->GetWindow()); } } } } SetActiveManager(this, activeContent); } break; case NS_MOUSE_BUTTON_UP: { ClearGlobalActiveContent(this); if (IsMouseEventReal(aEvent)) { if (!mCurrentTarget) { GetEventTarget(); } if (mCurrentTarget) { ret = CheckForAndDispatchClick(presContext, (nsMouseEvent*)aEvent, aStatus); } } nsIPresShell *shell = presContext->GetPresShell(); if (shell) { nsRefPtr frameSelection = shell->FrameSelection(); frameSelection->SetMouseDownState(PR_FALSE); } } break; case NS_MOUSE_SCROLL: case NS_MOUSE_PIXEL_SCROLL: { nsMouseScrollEvent *msEvent = static_cast(aEvent); if (aEvent->message == NS_MOUSE_SCROLL) { // Mark the subsequent pixel scrolls as valid / invalid, based on the // observation if the previous line scroll has been canceled if (msEvent->scrollFlags & nsMouseScrollEvent::kIsHorizontal) { mLastLineScrollConsumedX = (nsEventStatus_eConsumeNoDefault == *aStatus); } else if (msEvent->scrollFlags & nsMouseScrollEvent::kIsVertical) { mLastLineScrollConsumedY = (nsEventStatus_eConsumeNoDefault == *aStatus); } if (!(msEvent->scrollFlags & nsMouseScrollEvent::kHasPixels)) { // No generated pixel scroll event will follow. // Create and send a pixel scroll DOM event now. nsWeakFrame weakFrame(aTargetFrame); SendPixelScrollEvent(aTargetFrame, msEvent, presContext, aStatus); NS_ENSURE_STATE(weakFrame.IsAlive()); } } if (*aStatus != nsEventStatus_eConsumeNoDefault) { PRBool useSysNumLines = UseSystemScrollSettingFor(msEvent); PRInt32 action = ComputeWheelActionFor(msEvent, useSysNumLines); switch (action) { case MOUSE_SCROLL_N_LINES: DoScrollText(aTargetFrame, msEvent, nsIScrollableFrame::LINES, useSysNumLines); break; case MOUSE_SCROLL_PAGE: DoScrollText(aTargetFrame, msEvent, nsIScrollableFrame::PAGES, PR_FALSE); break; case MOUSE_SCROLL_PIXELS: DoScrollText(aTargetFrame, msEvent, nsIScrollableFrame::DEVICE_PIXELS, PR_FALSE); break; case MOUSE_SCROLL_HISTORY: DoScrollHistory(msEvent->delta); break; case MOUSE_SCROLL_ZOOM: DoScrollZoom(aTargetFrame, msEvent->delta); break; default: // Including -1 (do nothing) break; } *aStatus = nsEventStatus_eConsumeNoDefault; } } break; case NS_GESTURENOTIFY_EVENT_START: { if (nsEventStatus_eConsumeNoDefault != *aStatus) DecideGestureEvent(static_cast(aEvent), mCurrentTarget); } break; case NS_DRAGDROP_ENTER: case NS_DRAGDROP_OVER: { NS_ASSERTION(aEvent->eventStructType == NS_DRAG_EVENT, "Expected a drag event"); nsCOMPtr dragSession = nsContentUtils::GetDragSession(); if (!dragSession) break; // Reset the flag. dragSession->SetOnlyChromeDrop(PR_FALSE); if (mPresContext) { EnsureDocument(mPresContext); } PRBool isChromeDoc = nsContentUtils::IsChromeDoc(mDocument); // the initial dataTransfer is the one from the dragstart event that // was set on the dragSession when the drag began. nsCOMPtr dataTransfer; nsCOMPtr initialDataTransfer; dragSession->GetDataTransfer(getter_AddRefs(initialDataTransfer)); nsCOMPtr initialDataTransferNS = do_QueryInterface(initialDataTransfer); nsDragEvent *dragEvent = (nsDragEvent*)aEvent; // collect any changes to moz cursor settings stored in the event's // data transfer. UpdateDragDataTransfer(dragEvent); // cancelling a dragenter or dragover event means that a drop should be // allowed, so update the dropEffect and the canDrop state to indicate // that a drag is allowed. If the event isn't cancelled, a drop won't be // allowed. Essentially, to allow a drop somewhere, specify the effects // using the effectAllowed and dropEffect properties in a dragenter or // dragover event and cancel the event. To not allow a drop somewhere, // don't cancel the event or set the effectAllowed or dropEffect to // "none". This way, if the event is just ignored, no drop will be // allowed. PRUint32 dropEffect = nsIDragService::DRAGDROP_ACTION_NONE; if (nsEventStatus_eConsumeNoDefault == *aStatus) { // if the event has a dataTransfer set, use it. if (dragEvent->dataTransfer) { // get the dataTransfer and the dropEffect that was set on it dataTransfer = do_QueryInterface(dragEvent->dataTransfer); dataTransfer->GetDropEffectInt(&dropEffect); } else { // if dragEvent->dataTransfer is null, it means that no attempt was // made to access the dataTransfer during the event, yet the event // was cancelled. Instead, use the initial data transfer available // from the drag session. The drop effect would not have been // initialized (which is done in nsDOMDragEvent::GetDataTransfer), // so set it from the drag action. We'll still want to filter it // based on the effectAllowed below. dataTransfer = initialDataTransferNS; PRUint32 action; dragSession->GetDragAction(&action); // filter the drop effect based on the action. Use UNINITIALIZED as // any effect is allowed. dropEffect = nsContentUtils::FilterDropEffect(action, nsIDragService::DRAGDROP_ACTION_UNINITIALIZED); } // At this point, if the dataTransfer is null, it means that the // drag was originally started by directly calling the drag service. // Just assume that all effects are allowed. PRUint32 effectAllowed = nsIDragService::DRAGDROP_ACTION_UNINITIALIZED; if (dataTransfer) dataTransfer->GetEffectAllowedInt(&effectAllowed); // set the drag action based on the drop effect and effect allowed. // The drop effect field on the drag transfer object specifies the // desired current drop effect. However, it cannot be used if the // effectAllowed state doesn't include that type of action. If the // dropEffect is "none", then the action will be 'none' so a drop will // not be allowed. PRUint32 action = nsIDragService::DRAGDROP_ACTION_NONE; if (effectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED || dropEffect & effectAllowed) action = dropEffect; if (action == nsIDragService::DRAGDROP_ACTION_NONE) dropEffect = nsIDragService::DRAGDROP_ACTION_NONE; // inform the drag session that a drop is allowed on this node. dragSession->SetDragAction(action); dragSession->SetCanDrop(action != nsIDragService::DRAGDROP_ACTION_NONE); // For now, do this only for dragover. //XXXsmaug dragenter needs some more work. if (aEvent->message == NS_DRAGDROP_OVER && !isChromeDoc) { // Someone has called preventDefault(), check whether is was content. dragSession->SetOnlyChromeDrop( !(aEvent->flags & NS_EVENT_FLAG_NO_DEFAULT_CALLED_IN_CONTENT)); } } else if (aEvent->message == NS_DRAGDROP_OVER && !isChromeDoc) { // No one called preventDefault(), so handle drop only in chrome. dragSession->SetOnlyChromeDrop(PR_TRUE); } // now set the drop effect in the initial dataTransfer. This ensures // that we can get the desired drop effect in the drop event. if (initialDataTransferNS) initialDataTransferNS->SetDropEffectInt(dropEffect); } break; case NS_DRAGDROP_DROP: { // now fire the dragdrop event, for compatibility with XUL if (mCurrentTarget && nsEventStatus_eConsumeNoDefault != *aStatus) { nsCOMPtr targetContent; mCurrentTarget->GetContentForEvent(presContext, aEvent, getter_AddRefs(targetContent)); nsCOMPtr widget = mCurrentTarget->GetNearestWidget(); nsDragEvent event(NS_IS_TRUSTED_EVENT(aEvent), NS_DRAGDROP_DRAGDROP, widget); nsMouseEvent* mouseEvent = static_cast(aEvent); event.refPoint = mouseEvent->refPoint; if (mouseEvent->widget) { event.refPoint += mouseEvent->widget->WidgetToScreenOffset(); } event.refPoint -= widget->WidgetToScreenOffset(); event.isShift = mouseEvent->isShift; event.isControl = mouseEvent->isControl; event.isAlt = mouseEvent->isAlt; event.isMeta = mouseEvent->isMeta; event.inputSource = mouseEvent->inputSource; nsEventStatus status = nsEventStatus_eIgnore; nsCOMPtr presShell = mPresContext->GetPresShell(); if (presShell) { presShell->HandleEventWithTarget(&event, mCurrentTarget, targetContent, &status); } } ClearGlobalActiveContent(this); break; } case NS_DRAGDROP_EXIT: // make sure to fire the enter and exit_synth events after the // NS_DRAGDROP_EXIT event, otherwise we'll clean up too early GenerateDragDropEnterExit(presContext, (nsGUIEvent*)aEvent); break; case NS_KEY_UP: break; case NS_KEY_PRESS: if (nsEventStatus_eConsumeNoDefault != *aStatus) { nsKeyEvent* keyEvent = (nsKeyEvent*)aEvent; //This is to prevent keyboard scrolling while alt modifier in use. if (!keyEvent->isAlt) { switch(keyEvent->keyCode) { case NS_VK_TAB: case NS_VK_F6: EnsureDocument(mPresContext); nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (fm && mDocument) { // Shift focus forward or back depending on shift key PRBool isDocMove = ((nsInputEvent*)aEvent)->isControl || (keyEvent->keyCode == NS_VK_F6); PRUint32 dir = static_cast(aEvent)->isShift ? (isDocMove ? static_cast(nsIFocusManager::MOVEFOCUS_BACKWARDDOC) : static_cast(nsIFocusManager::MOVEFOCUS_BACKWARD)) : (isDocMove ? static_cast(nsIFocusManager::MOVEFOCUS_FORWARDDOC) : static_cast(nsIFocusManager::MOVEFOCUS_FORWARD)); nsCOMPtr result; fm->MoveFocus(mDocument->GetWindow(), nsnull, dir, nsIFocusManager::FLAG_BYKEY, getter_AddRefs(result)); } *aStatus = nsEventStatus_eConsumeNoDefault; break; } } } break; case NS_MOUSE_ENTER: if (mCurrentTarget) { nsCOMPtr targetContent; mCurrentTarget->GetContentForEvent(presContext, aEvent, getter_AddRefs(targetContent)); SetContentState(targetContent, NS_EVENT_STATE_HOVER); } break; #ifdef XP_MACOSX case NS_MOUSE_ACTIVATE: if (mCurrentTarget) { nsCOMPtr targetContent; mCurrentTarget->GetContentForEvent(presContext, aEvent, getter_AddRefs(targetContent)); if (!NodeAllowsClickThrough(targetContent)) { *aStatus = nsEventStatus_eConsumeNoDefault; } } break; #endif } //Reset target frame to null to avoid mistargeting after reentrant event mCurrentTarget = nsnull; mCurrentTargetContent = nsnull; return ret; } PRBool nsEventStateManager::RemoteQueryContentEvent(nsEvent *aEvent) { nsQueryContentEvent *queryEvent = static_cast(aEvent); if (!IsTargetCrossProcess(queryEvent)) { return PR_FALSE; } // Will not be handled locally, remote the event GetCrossProcessTarget()->HandleQueryContentEvent(*queryEvent); return PR_TRUE; } TabParent* nsEventStateManager::GetCrossProcessTarget() { return TabParent::GetIMETabParent(); } PRBool nsEventStateManager::IsTargetCrossProcess(nsGUIEvent *aEvent) { // Check to see if there is a focused, editable content in chrome, // in that case, do not forward IME events to content nsIContent *focusedContent = GetFocusedContent(); if (focusedContent && focusedContent->IsEditable()) return PR_FALSE; return TabParent::GetIMETabParent() != nsnull; } void nsEventStateManager::NotifyDestroyPresContext(nsPresContext* aPresContext) { nsIMEStateManager::OnDestroyPresContext(aPresContext); } void nsEventStateManager::SetPresContext(nsPresContext* aPresContext) { mPresContext = aPresContext; } void nsEventStateManager::ClearFrameRefs(nsIFrame* aFrame) { if (aFrame && aFrame == mCurrentTarget) { mCurrentTargetContent = aFrame->GetContent(); } } void nsEventStateManager::UpdateCursor(nsPresContext* aPresContext, nsEvent* aEvent, nsIFrame* aTargetFrame, nsEventStatus* aStatus) { PRInt32 cursor = NS_STYLE_CURSOR_DEFAULT; imgIContainer* container = nsnull; PRBool haveHotspot = PR_FALSE; float hotspotX = 0.0f, hotspotY = 0.0f; //If cursor is locked just use the locked one if (mLockCursor) { cursor = mLockCursor; } //If not locked, look for correct cursor else if (aTargetFrame) { nsIFrame::Cursor framecursor; nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, aTargetFrame); if (NS_FAILED(aTargetFrame->GetCursor(pt, framecursor))) return; // don't update the cursor if we failed to get it from the frame see bug 118877 cursor = framecursor.mCursor; container = framecursor.mContainer; haveHotspot = framecursor.mHaveHotspot; hotspotX = framecursor.mHotspotX; hotspotY = framecursor.mHotspotY; } if (Preferences::GetBool("ui.use_activity_cursor", PR_FALSE)) { // Check whether or not to show the busy cursor nsCOMPtr pcContainer = aPresContext->GetContainer(); nsCOMPtr docShell(do_QueryInterface(pcContainer)); if (!docShell) return; PRUint32 busyFlags = nsIDocShell::BUSY_FLAGS_NONE; docShell->GetBusyFlags(&busyFlags); // Show busy cursor everywhere before page loads // and just replace the arrow cursor after page starts loading if (busyFlags & nsIDocShell::BUSY_FLAGS_BUSY && (cursor == NS_STYLE_CURSOR_AUTO || cursor == NS_STYLE_CURSOR_DEFAULT)) { cursor = NS_STYLE_CURSOR_SPINNING; container = nsnull; } } if (aTargetFrame) { SetCursor(cursor, container, haveHotspot, hotspotX, hotspotY, aTargetFrame->GetNearestWidget(), PR_FALSE); } if (mLockCursor || NS_STYLE_CURSOR_AUTO != cursor) { *aStatus = nsEventStatus_eConsumeDoDefault; } } nsresult nsEventStateManager::SetCursor(PRInt32 aCursor, imgIContainer* aContainer, PRBool aHaveHotspot, float aHotspotX, float aHotspotY, nsIWidget* aWidget, PRBool aLockCursor) { EnsureDocument(mPresContext); NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE); sMouseOverDocument = mDocument.get(); nsCursor c; NS_ENSURE_TRUE(aWidget, NS_ERROR_FAILURE); if (aLockCursor) { if (NS_STYLE_CURSOR_AUTO != aCursor) { mLockCursor = aCursor; } else { //If cursor style is set to auto we unlock the cursor again. mLockCursor = 0; } } switch (aCursor) { default: case NS_STYLE_CURSOR_AUTO: case NS_STYLE_CURSOR_DEFAULT: c = eCursor_standard; break; case NS_STYLE_CURSOR_POINTER: c = eCursor_hyperlink; break; case NS_STYLE_CURSOR_CROSSHAIR: c = eCursor_crosshair; break; case NS_STYLE_CURSOR_MOVE: c = eCursor_move; break; case NS_STYLE_CURSOR_TEXT: c = eCursor_select; break; case NS_STYLE_CURSOR_WAIT: c = eCursor_wait; break; case NS_STYLE_CURSOR_HELP: c = eCursor_help; break; case NS_STYLE_CURSOR_N_RESIZE: c = eCursor_n_resize; break; case NS_STYLE_CURSOR_S_RESIZE: c = eCursor_s_resize; break; case NS_STYLE_CURSOR_W_RESIZE: c = eCursor_w_resize; break; case NS_STYLE_CURSOR_E_RESIZE: c = eCursor_e_resize; break; case NS_STYLE_CURSOR_NW_RESIZE: c = eCursor_nw_resize; break; case NS_STYLE_CURSOR_SE_RESIZE: c = eCursor_se_resize; break; case NS_STYLE_CURSOR_NE_RESIZE: c = eCursor_ne_resize; break; case NS_STYLE_CURSOR_SW_RESIZE: c = eCursor_sw_resize; break; case NS_STYLE_CURSOR_COPY: // CSS3 c = eCursor_copy; break; case NS_STYLE_CURSOR_ALIAS: c = eCursor_alias; break; case NS_STYLE_CURSOR_CONTEXT_MENU: c = eCursor_context_menu; break; case NS_STYLE_CURSOR_CELL: c = eCursor_cell; break; case NS_STYLE_CURSOR_GRAB: c = eCursor_grab; break; case NS_STYLE_CURSOR_GRABBING: c = eCursor_grabbing; break; case NS_STYLE_CURSOR_SPINNING: c = eCursor_spinning; break; case NS_STYLE_CURSOR_MOZ_ZOOM_IN: c = eCursor_zoom_in; break; case NS_STYLE_CURSOR_MOZ_ZOOM_OUT: c = eCursor_zoom_out; break; case NS_STYLE_CURSOR_NOT_ALLOWED: c = eCursor_not_allowed; break; case NS_STYLE_CURSOR_COL_RESIZE: c = eCursor_col_resize; break; case NS_STYLE_CURSOR_ROW_RESIZE: c = eCursor_row_resize; break; case NS_STYLE_CURSOR_NO_DROP: c = eCursor_no_drop; break; case NS_STYLE_CURSOR_VERTICAL_TEXT: c = eCursor_vertical_text; break; case NS_STYLE_CURSOR_ALL_SCROLL: c = eCursor_all_scroll; break; case NS_STYLE_CURSOR_NESW_RESIZE: c = eCursor_nesw_resize; break; case NS_STYLE_CURSOR_NWSE_RESIZE: c = eCursor_nwse_resize; break; case NS_STYLE_CURSOR_NS_RESIZE: c = eCursor_ns_resize; break; case NS_STYLE_CURSOR_EW_RESIZE: c = eCursor_ew_resize; break; case NS_STYLE_CURSOR_NONE: c = eCursor_none; break; } // First, try the imgIContainer, if non-null nsresult rv = NS_ERROR_FAILURE; if (aContainer) { PRUint32 hotspotX, hotspotY; // css3-ui says to use the CSS-specified hotspot if present, // otherwise use the intrinsic hotspot, otherwise use the top left // corner. if (aHaveHotspot) { PRInt32 imgWidth, imgHeight; aContainer->GetWidth(&imgWidth); aContainer->GetHeight(&imgHeight); // XXX NS_MAX(NS_lround(x), 0)? hotspotX = aHotspotX > 0.0f ? PRUint32(aHotspotX + 0.5f) : PRUint32(0); if (hotspotX >= PRUint32(imgWidth)) hotspotX = imgWidth - 1; hotspotY = aHotspotY > 0.0f ? PRUint32(aHotspotY + 0.5f) : PRUint32(0); if (hotspotY >= PRUint32(imgHeight)) hotspotY = imgHeight - 1; } else { hotspotX = 0; hotspotY = 0; nsCOMPtr props(do_QueryInterface(aContainer)); if (props) { nsCOMPtr hotspotXWrap, hotspotYWrap; props->Get("hotspotX", NS_GET_IID(nsISupportsPRUint32), getter_AddRefs(hotspotXWrap)); props->Get("hotspotY", NS_GET_IID(nsISupportsPRUint32), getter_AddRefs(hotspotYWrap)); if (hotspotXWrap) hotspotXWrap->GetData(&hotspotX); if (hotspotYWrap) hotspotYWrap->GetData(&hotspotY); } } rv = aWidget->SetCursor(aContainer, hotspotX, hotspotY); } if (NS_FAILED(rv)) aWidget->SetCursor(c); return NS_OK; } class NS_STACK_CLASS nsESMEventCB : public nsDispatchingCallback { public: nsESMEventCB(nsIContent* aTarget) : mTarget(aTarget) {} virtual void HandleEvent(nsEventChainPostVisitor& aVisitor) { if (aVisitor.mPresContext) { nsIFrame* frame = aVisitor.mPresContext->GetPrimaryFrameFor(mTarget); if (frame) { frame->HandleEvent(aVisitor.mPresContext, (nsGUIEvent*) aVisitor.mEvent, &aVisitor.mEventStatus); } } } nsCOMPtr mTarget; }; nsIFrame* nsEventStateManager::DispatchMouseEvent(nsGUIEvent* aEvent, PRUint32 aMessage, nsIContent* aTargetContent, nsIContent* aRelatedContent) { nsEventStatus status = nsEventStatus_eIgnore; nsMouseEvent event(NS_IS_TRUSTED_EVENT(aEvent), aMessage, aEvent->widget, nsMouseEvent::eReal); event.refPoint = aEvent->refPoint; event.isShift = ((nsMouseEvent*)aEvent)->isShift; event.isControl = ((nsMouseEvent*)aEvent)->isControl; event.isAlt = ((nsMouseEvent*)aEvent)->isAlt; event.isMeta = ((nsMouseEvent*)aEvent)->isMeta; event.pluginEvent = ((nsMouseEvent*)aEvent)->pluginEvent; event.relatedTarget = aRelatedContent; event.inputSource = static_cast(aEvent)->inputSource; nsWeakFrame previousTarget = mCurrentTarget; mCurrentTargetContent = aTargetContent; nsIFrame* targetFrame = nsnull; if (aTargetContent) { nsESMEventCB callback(aTargetContent); nsEventDispatcher::Dispatch(aTargetContent, mPresContext, &event, nsnull, &status, &callback); // Although the primary frame was checked in event callback, // it may not be the same object after event dispatching and handling. // So we need to refetch it. if (mPresContext) { targetFrame = mPresContext->GetPrimaryFrameFor(aTargetContent); } } mCurrentTargetContent = nsnull; mCurrentTarget = previousTarget; return targetFrame; } void nsEventStateManager::NotifyMouseOut(nsGUIEvent* aEvent, nsIContent* aMovingInto) { if (!mLastMouseOverElement) return; // Before firing mouseout, check for recursion if (mLastMouseOverElement == mFirstMouseOutEventElement) return; if (mLastMouseOverFrame) { // if the frame is associated with a subdocument, // tell the subdocument that we're moving out of it nsSubDocumentFrame* subdocFrame = do_QueryFrame(mLastMouseOverFrame.GetFrame()); if (subdocFrame) { nsCOMPtr docshell; subdocFrame->GetDocShell(getter_AddRefs(docshell)); if (docshell) { nsRefPtr presContext; docshell->GetPresContext(getter_AddRefs(presContext)); if (presContext) { nsEventStateManager* kidESM = presContext->EventStateManager(); // Not moving into any element in this subdocument kidESM->NotifyMouseOut(aEvent, nsnull); } } } } // That could have caused DOM events which could wreak havoc. Reverify // things and be careful. if (!mLastMouseOverElement) return; // Store the first mouseOut event we fire and don't refire mouseOut // to that element while the first mouseOut is still ongoing. mFirstMouseOutEventElement = mLastMouseOverElement; // Don't touch hover state if aMovingInto is non-null. Caller will update // hover state itself, and we have optimizations for hover switching between // two nearby elements both deep in the DOM tree that would be defeated by // switching the hover state to null here. if (!aMovingInto) { // Unset :hover SetContentState(nsnull, NS_EVENT_STATE_HOVER); } // Fire mouseout DispatchMouseEvent(aEvent, NS_MOUSE_EXIT_SYNTH, mLastMouseOverElement, aMovingInto); mLastMouseOverFrame = nsnull; mLastMouseOverElement = nsnull; // Turn recursion protection back off mFirstMouseOutEventElement = nsnull; } void nsEventStateManager::NotifyMouseOver(nsGUIEvent* aEvent, nsIContent* aContent) { NS_ASSERTION(aContent, "Mouse must be over something"); if (mLastMouseOverElement == aContent) return; // Before firing mouseover, check for recursion if (aContent == mFirstMouseOverEventElement) return; // Check to see if we're a subdocument and if so update the parent // document's ESM state to indicate that the mouse is over the // content associated with our subdocument. EnsureDocument(mPresContext); nsIDocument *parentDoc = mDocument->GetParentDocument(); if (parentDoc) { nsIContent *docContent = parentDoc->FindContentForSubDocument(mDocument); if (docContent) { nsIPresShell *parentShell = parentDoc->GetShell(); if (parentShell) { nsEventStateManager* parentESM = parentShell->GetPresContext()->EventStateManager(); parentESM->NotifyMouseOver(aEvent, docContent); } } } // Firing the DOM event in the parent document could cause all kinds // of havoc. Reverify and take care. if (mLastMouseOverElement == aContent) return; // Remember mLastMouseOverElement as the related content for the // DispatchMouseEvent() call below, since NotifyMouseOut() resets it, bug 298477. nsCOMPtr lastMouseOverElement = mLastMouseOverElement; NotifyMouseOut(aEvent, aContent); // Store the first mouseOver event we fire and don't refire mouseOver // to that element while the first mouseOver is still ongoing. mFirstMouseOverEventElement = aContent; SetContentState(aContent, NS_EVENT_STATE_HOVER); // Fire mouseover mLastMouseOverFrame = DispatchMouseEvent(aEvent, NS_MOUSE_ENTER_SYNTH, aContent, lastMouseOverElement); mLastMouseOverElement = aContent; // Turn recursion protection back off mFirstMouseOverEventElement = nsnull; } void nsEventStateManager::GenerateMouseEnterExit(nsGUIEvent* aEvent) { EnsureDocument(mPresContext); if (!mDocument) return; // Hold onto old target content through the event and reset after. nsCOMPtr targetBeforeEvent = mCurrentTargetContent; switch(aEvent->message) { case NS_MOUSE_MOVE: { // Get the target content target (mousemove target == mouseover target) nsCOMPtr targetElement = GetEventTargetContent(aEvent); if (!targetElement) { // We're always over the document root, even if we're only // over dead space in a page (whose frame is not associated with // any content) or in print preview dead space targetElement = mDocument->GetRootElement(); } if (targetElement) { NotifyMouseOver(aEvent, targetElement); } } break; case NS_MOUSE_EXIT: { // This is actually the window mouse exit event. We're not moving // into any new element. if (mLastMouseOverFrame && nsContentUtils::GetTopLevelWidget(aEvent->widget) != nsContentUtils::GetTopLevelWidget(mLastMouseOverFrame->GetNearestWidget())) { // the MouseOut event widget doesn't have same top widget with // mLastMouseOverFrame, it's a spurious event for mLastMouseOverFrame break; } NotifyMouseOut(aEvent, nsnull); } break; } // reset mCurretTargetContent to what it was mCurrentTargetContent = targetBeforeEvent; } void nsEventStateManager::GenerateDragDropEnterExit(nsPresContext* aPresContext, nsGUIEvent* aEvent) { //Hold onto old target content through the event and reset after. nsCOMPtr targetBeforeEvent = mCurrentTargetContent; switch(aEvent->message) { case NS_DRAGDROP_OVER: { // when dragging from one frame to another, events are fired in the // order: dragexit, dragenter, dragleave if (mLastDragOverFrame != mCurrentTarget) { //We'll need the content, too, to check if it changed separately from the frames. nsCOMPtr lastContent; nsCOMPtr targetContent; mCurrentTarget->GetContentForEvent(aPresContext, aEvent, getter_AddRefs(targetContent)); if (mLastDragOverFrame) { //The frame has changed but the content may not have. Check before dispatching to content mLastDragOverFrame->GetContentForEvent(aPresContext, aEvent, getter_AddRefs(lastContent)); FireDragEnterOrExit(aPresContext, aEvent, NS_DRAGDROP_EXIT_SYNTH, targetContent, lastContent, mLastDragOverFrame); } FireDragEnterOrExit(aPresContext, aEvent, NS_DRAGDROP_ENTER, lastContent, targetContent, mCurrentTarget); if (mLastDragOverFrame) { FireDragEnterOrExit(aPresContext, aEvent, NS_DRAGDROP_LEAVE_SYNTH, targetContent, lastContent, mLastDragOverFrame); } mLastDragOverFrame = mCurrentTarget; } } break; case NS_DRAGDROP_EXIT: { //This is actually the window mouse exit event. if (mLastDragOverFrame) { nsCOMPtr lastContent; mLastDragOverFrame->GetContentForEvent(aPresContext, aEvent, getter_AddRefs(lastContent)); FireDragEnterOrExit(aPresContext, aEvent, NS_DRAGDROP_EXIT_SYNTH, nsnull, lastContent, mLastDragOverFrame); FireDragEnterOrExit(aPresContext, aEvent, NS_DRAGDROP_LEAVE_SYNTH, nsnull, lastContent, mLastDragOverFrame); mLastDragOverFrame = nsnull; } } break; } //reset mCurretTargetContent to what it was mCurrentTargetContent = targetBeforeEvent; // Now flush all pending notifications, for better responsiveness. FlushPendingEvents(aPresContext); } void nsEventStateManager::FireDragEnterOrExit(nsPresContext* aPresContext, nsGUIEvent* aEvent, PRUint32 aMsg, nsIContent* aRelatedTarget, nsIContent* aTargetContent, nsWeakFrame& aTargetFrame) { nsEventStatus status = nsEventStatus_eIgnore; nsDragEvent event(NS_IS_TRUSTED_EVENT(aEvent), aMsg, aEvent->widget); event.refPoint = aEvent->refPoint; event.isShift = ((nsMouseEvent*)aEvent)->isShift; event.isControl = ((nsMouseEvent*)aEvent)->isControl; event.isAlt = ((nsMouseEvent*)aEvent)->isAlt; event.isMeta = ((nsMouseEvent*)aEvent)->isMeta; event.relatedTarget = aRelatedTarget; event.inputSource = static_cast(aEvent)->inputSource; mCurrentTargetContent = aTargetContent; if (aTargetContent != aRelatedTarget) { //XXX This event should still go somewhere!! if (aTargetContent) nsEventDispatcher::Dispatch(aTargetContent, aPresContext, &event, nsnull, &status); // adjust the drag hover if the dragenter event was cancelled or this is a drag exit if (status == nsEventStatus_eConsumeNoDefault || aMsg == NS_DRAGDROP_EXIT) SetContentState((aMsg == NS_DRAGDROP_ENTER) ? aTargetContent : nsnull, NS_EVENT_STATE_DRAGOVER); // collect any changes to moz cursor settings stored in the event's // data transfer. if (aMsg == NS_DRAGDROP_LEAVE_SYNTH || aMsg == NS_DRAGDROP_EXIT_SYNTH || aMsg == NS_DRAGDROP_ENTER) UpdateDragDataTransfer(&event); } // Finally dispatch the event to the frame if (aTargetFrame) aTargetFrame->HandleEvent(aPresContext, &event, &status); } void nsEventStateManager::UpdateDragDataTransfer(nsDragEvent* dragEvent) { NS_ASSERTION(dragEvent, "drag event is null in UpdateDragDataTransfer!"); if (!dragEvent->dataTransfer) return; nsCOMPtr dragSession = nsContentUtils::GetDragSession(); if (dragSession) { // the initial dataTransfer is the one from the dragstart event that // was set on the dragSession when the drag began. nsCOMPtr initialDataTransfer; dragSession->GetDataTransfer(getter_AddRefs(initialDataTransfer)); // grab the interface that has GetMozCursor. nsCOMPtr initialDataTransferNS = do_QueryInterface(initialDataTransfer); nsCOMPtr eventTransferNS = do_QueryInterface(dragEvent->dataTransfer); if (initialDataTransferNS && eventTransferNS) { // retrieve the current moz cursor setting and save it. nsAutoString mozCursor; eventTransferNS->GetMozCursor(mozCursor); initialDataTransferNS->SetMozCursor(mozCursor); } } } nsresult nsEventStateManager::SetClickCount(nsPresContext* aPresContext, nsMouseEvent *aEvent, nsEventStatus* aStatus) { nsCOMPtr mouseContent; nsIContent* mouseContentParent = nsnull; mCurrentTarget->GetContentForEvent(aPresContext, aEvent, getter_AddRefs(mouseContent)); if (mouseContent) { if (mouseContent->IsNodeOfType(nsINode::eTEXT)) { mouseContent = mouseContent->GetParent(); } if (mouseContent && mouseContent->IsRootOfNativeAnonymousSubtree()) { mouseContentParent = mouseContent->GetParent(); } } switch (aEvent->button) { case nsMouseEvent::eLeftButton: if (aEvent->message == NS_MOUSE_BUTTON_DOWN) { mLastLeftMouseDownContent = mouseContent; mLastLeftMouseDownContentParent = mouseContentParent; } else if (aEvent->message == NS_MOUSE_BUTTON_UP) { if (mLastLeftMouseDownContent == mouseContent || mLastLeftMouseDownContentParent == mouseContent || mLastLeftMouseDownContent == mouseContentParent) { aEvent->clickCount = mLClickCount; mLClickCount = 0; } else { aEvent->clickCount = 0; } mLastLeftMouseDownContent = nsnull; mLastLeftMouseDownContentParent = nsnull; } break; case nsMouseEvent::eMiddleButton: if (aEvent->message == NS_MOUSE_BUTTON_DOWN) { mLastMiddleMouseDownContent = mouseContent; mLastMiddleMouseDownContentParent = mouseContentParent; } else if (aEvent->message == NS_MOUSE_BUTTON_UP) { if (mLastMiddleMouseDownContent == mouseContent || mLastMiddleMouseDownContentParent == mouseContent || mLastMiddleMouseDownContent == mouseContentParent) { aEvent->clickCount = mMClickCount; mMClickCount = 0; } else { aEvent->clickCount = 0; } mLastMiddleMouseDownContent = nsnull; mLastMiddleMouseDownContentParent = nsnull; } break; case nsMouseEvent::eRightButton: if (aEvent->message == NS_MOUSE_BUTTON_DOWN) { mLastRightMouseDownContent = mouseContent; mLastRightMouseDownContentParent = mouseContentParent; } else if (aEvent->message == NS_MOUSE_BUTTON_UP) { if (mLastRightMouseDownContent == mouseContent || mLastRightMouseDownContentParent == mouseContent || mLastRightMouseDownContent == mouseContentParent) { aEvent->clickCount = mRClickCount; mRClickCount = 0; } else { aEvent->clickCount = 0; } mLastRightMouseDownContent = nsnull; mLastRightMouseDownContentParent = nsnull; } break; } return NS_OK; } nsresult nsEventStateManager::CheckForAndDispatchClick(nsPresContext* aPresContext, nsMouseEvent *aEvent, nsEventStatus* aStatus) { nsresult ret = NS_OK; PRInt32 flags = NS_EVENT_FLAG_NONE; //If mouse is still over same element, clickcount will be > 1. //If it has moved it will be zero, so no click. if (0 != aEvent->clickCount) { //Check that the window isn't disabled before firing a click //(see bug 366544). if (aEvent->widget) { PRBool enabled; aEvent->widget->IsEnabled(&enabled); if (!enabled) { return ret; } } //fire click if (aEvent->button == nsMouseEvent::eMiddleButton || aEvent->button == nsMouseEvent::eRightButton) { flags |= sLeftClickOnly ? NS_EVENT_FLAG_NO_CONTENT_DISPATCH : NS_EVENT_FLAG_NONE; } nsMouseEvent event(NS_IS_TRUSTED_EVENT(aEvent), NS_MOUSE_CLICK, aEvent->widget, nsMouseEvent::eReal); event.refPoint = aEvent->refPoint; event.clickCount = aEvent->clickCount; event.isShift = aEvent->isShift; event.isControl = aEvent->isControl; event.isAlt = aEvent->isAlt; event.isMeta = aEvent->isMeta; event.time = aEvent->time; event.flags |= flags; event.button = aEvent->button; event.inputSource = aEvent->inputSource; nsCOMPtr presShell = mPresContext->GetPresShell(); if (presShell) { nsCOMPtr mouseContent = GetEventTargetContent(aEvent); ret = presShell->HandleEventWithTarget(&event, mCurrentTarget, mouseContent, aStatus); if (NS_SUCCEEDED(ret) && aEvent->clickCount == 2) { //fire double click nsMouseEvent event2(NS_IS_TRUSTED_EVENT(aEvent), NS_MOUSE_DOUBLECLICK, aEvent->widget, nsMouseEvent::eReal); event2.refPoint = aEvent->refPoint; event2.clickCount = aEvent->clickCount; event2.isShift = aEvent->isShift; event2.isControl = aEvent->isControl; event2.isAlt = aEvent->isAlt; event2.isMeta = aEvent->isMeta; event2.flags |= flags; event2.button = aEvent->button; event2.inputSource = aEvent->inputSource; ret = presShell->HandleEventWithTarget(&event2, mCurrentTarget, mouseContent, aStatus); } } } return ret; } nsIFrame* nsEventStateManager::GetEventTarget() { nsIPresShell *shell; if (mCurrentTarget || !mPresContext || !(shell = mPresContext->GetPresShell())) { return mCurrentTarget; } if (mCurrentTargetContent) { mCurrentTarget = mPresContext->GetPrimaryFrameFor(mCurrentTargetContent); if (mCurrentTarget) { return mCurrentTarget; } } nsIFrame* frame = shell->GetEventTargetFrame(); return (mCurrentTarget = frame); } already_AddRefed nsEventStateManager::GetEventTargetContent(nsEvent* aEvent) { if (aEvent && (aEvent->message == NS_FOCUS_CONTENT || aEvent->message == NS_BLUR_CONTENT)) { nsCOMPtr content = GetFocusedContent(); return content.forget(); } if (mCurrentTargetContent) { nsCOMPtr content = mCurrentTargetContent; return content.forget(); } nsIContent *content = nsnull; nsIPresShell *presShell = mPresContext->GetPresShell(); if (presShell) { content = presShell->GetEventTargetContent(aEvent).get(); } // Some events here may set mCurrentTarget but not set the corresponding // event target in the PresShell. if (!content && mCurrentTarget) { mCurrentTarget->GetContentForEvent(mPresContext, aEvent, &content); } return content; } static Element* GetLabelTarget(nsIContent* aPossibleLabel) { nsHTMLLabelElement* label = nsHTMLLabelElement::FromContent(aPossibleLabel); if (!label) return nsnull; return label->GetLabeledElement(); } static nsIContent* FindCommonAncestor(nsIContent *aNode1, nsIContent *aNode2) { // Find closest common ancestor if (aNode1 && aNode2) { // Find the nearest common ancestor by counting the distance to the // root and then walking up again, in pairs. PRInt32 offset = 0; nsIContent *anc1 = aNode1; for (;;) { ++offset; nsIContent* parent = anc1->GetParent(); if (!parent) break; anc1 = parent; } nsIContent *anc2 = aNode2; for (;;) { --offset; nsIContent* parent = anc2->GetParent(); if (!parent) break; anc2 = parent; } if (anc1 == anc2) { anc1 = aNode1; anc2 = aNode2; while (offset > 0) { anc1 = anc1->GetParent(); --offset; } while (offset < 0) { anc2 = anc2->GetParent(); ++offset; } while (anc1 != anc2) { anc1 = anc1->GetParent(); anc2 = anc2->GetParent(); } return anc1; } } return nsnull; } /* static */ inline void nsEventStateManager::DoStateChange(Element* aElement, nsEventStates aState, PRBool aAddState) { if (aAddState) { aElement->AddStates(aState); } else { aElement->RemoveStates(aState); } } /* static */ inline void nsEventStateManager::DoStateChange(nsIContent* aContent, nsEventStates aState, PRBool aStateAdded) { if (aContent->IsElement()) { DoStateChange(aContent->AsElement(), aState, aStateAdded); } } /* static */ void nsEventStateManager::UpdateAncestorState(nsIContent* aStartNode, nsIContent* aStopBefore, nsEventStates aState, PRBool aAddState) { for (; aStartNode && aStartNode != aStopBefore; aStartNode = aStartNode->GetParent()) { // We might be starting with a non-element (e.g. a text node) and // if someone is doing something weird might be ending with a // non-element too (e.g. a document fragment) if (!aStartNode->IsElement()) { continue; } Element* element = aStartNode->AsElement(); DoStateChange(element, aState, aAddState); Element* labelTarget = GetLabelTarget(element); if (labelTarget) { DoStateChange(labelTarget, aState, aAddState); } } } PRBool nsEventStateManager::SetContentState(nsIContent *aContent, nsEventStates aState) { // We manage 4 states here: ACTIVE, HOVER, DRAGOVER, URLTARGET // The input must be exactly one of them. NS_PRECONDITION(aState == NS_EVENT_STATE_ACTIVE || aState == NS_EVENT_STATE_HOVER || aState == NS_EVENT_STATE_DRAGOVER || aState == NS_EVENT_STATE_URLTARGET, "Unexpected state"); nsCOMPtr notifyContent1; nsCOMPtr notifyContent2; PRBool updateAncestors; if (aState == NS_EVENT_STATE_HOVER || aState == NS_EVENT_STATE_ACTIVE) { // Hover and active are hierarchical updateAncestors = PR_TRUE; // check to see that this state is allowed by style. Check dragover too? // XXX Is this even what we want? if (mCurrentTarget) { const nsStyleUserInterface* ui = mCurrentTarget->GetStyleUserInterface(); if (ui->mUserInput == NS_STYLE_USER_INPUT_NONE) return PR_FALSE; } if (aState == NS_EVENT_STATE_ACTIVE) { if (aContent != mActiveContent) { notifyContent1 = aContent; notifyContent2 = mActiveContent; mActiveContent = aContent; } } else { NS_ASSERTION(aState == NS_EVENT_STATE_HOVER, "How did that happen?"); nsIContent* newHover; if (mPresContext->IsDynamic()) { newHover = aContent; } else { NS_ASSERTION(!aContent || aContent->GetCurrentDoc() == mPresContext->PresShell()->GetDocument(), "Unexpected document"); nsIFrame *frame = aContent ? aContent->GetPrimaryFrame() : nsnull; if (frame && nsLayoutUtils::IsViewportScrollbarFrame(frame)) { // The scrollbars of viewport should not ignore the hover state. // Because they are *not* the content of the web page. newHover = aContent; } else { // All contents of the web page should ignore the hover state. newHover = nsnull; } } if (newHover != mHoverContent) { notifyContent1 = newHover; notifyContent2 = mHoverContent; mHoverContent = newHover; } } } else { updateAncestors = PR_FALSE; if (aState == NS_EVENT_STATE_DRAGOVER) { if (aContent != mDragOverContent) { notifyContent1 = aContent; notifyContent2 = mDragOverContent; mDragOverContent = aContent; } } else if (aState == NS_EVENT_STATE_URLTARGET) { if (aContent != mURLTargetContent) { notifyContent1 = aContent; notifyContent2 = mURLTargetContent; mURLTargetContent = aContent; } } } // We need to keep track of which of notifyContent1 and notifyContent2 is // getting the state set and which is getting it unset. If both are // non-null, then notifyContent1 is having the state set and notifyContent2 // is having it unset. But if one of them is null, we need to keep track of // the right thing for notifyContent1 explicitly. PRBool content1StateSet = PR_TRUE; if (!notifyContent1) { // This is ok because FindCommonAncestor wouldn't find anything // anyway if notifyContent1 is null. notifyContent1 = notifyContent2; notifyContent2 = nsnull; content1StateSet = PR_FALSE; } if (notifyContent1 && mPresContext) { EnsureDocument(mPresContext); if (mDocument) { nsAutoScriptBlocker scriptBlocker; if (updateAncestors) { nsCOMPtr commonAncestor = FindCommonAncestor(notifyContent1, notifyContent2); if (notifyContent2) { // It's very important to first notify the state removal and // then the state addition, because due to labels it's // possible that we're removing state from some element but // then adding it again (say because mHoverContent changed // from a control to its label). UpdateAncestorState(notifyContent2, commonAncestor, aState, PR_FALSE); } UpdateAncestorState(notifyContent1, commonAncestor, aState, content1StateSet); } else { if (notifyContent2) { DoStateChange(notifyContent2, aState, PR_FALSE); } DoStateChange(notifyContent1, aState, content1StateSet); } } } return PR_TRUE; } void nsEventStateManager::ContentRemoved(nsIDocument* aDocument, nsIContent* aContent) { // inform the focus manager that the content is being removed. If this // content is focused, the focus will be removed without firing events. nsFocusManager* fm = nsFocusManager::GetFocusManager(); if (fm) fm->ContentRemoved(aDocument, aContent); if (mHoverContent && nsContentUtils::ContentIsDescendantOf(mHoverContent, aContent)) { // Since hover is hierarchical, set the current hover to the // content's parent node. SetContentState(aContent->GetParent(), NS_EVENT_STATE_HOVER); } if (mActiveContent && nsContentUtils::ContentIsDescendantOf(mActiveContent, aContent)) { // Active is hierarchical, so set the current active to the // content's parent node. SetContentState(aContent->GetParent(), NS_EVENT_STATE_ACTIVE); } if (mDragOverContent && nsContentUtils::ContentIsDescendantOf(mDragOverContent, aContent)) { mDragOverContent = nsnull; } if (mLastMouseOverElement && nsContentUtils::ContentIsDescendantOf(mLastMouseOverElement, aContent)) { // See bug 292146 for why we want to null this out mLastMouseOverElement = nsnull; } } PRBool nsEventStateManager::EventStatusOK(nsGUIEvent* aEvent) { return !(aEvent->message == NS_MOUSE_BUTTON_DOWN && static_cast(aEvent)->button == nsMouseEvent::eLeftButton && !sNormalLMouseEventInProcess); } //------------------------------------------- // Access Key Registration //------------------------------------------- void nsEventStateManager::RegisterAccessKey(nsIContent* aContent, PRUint32 aKey) { if (aContent && mAccessKeys.IndexOf(aContent) == -1) mAccessKeys.AppendObject(aContent); } void nsEventStateManager::UnregisterAccessKey(nsIContent* aContent, PRUint32 aKey) { if (aContent) mAccessKeys.RemoveObject(aContent); } PRUint32 nsEventStateManager::GetRegisteredAccessKey(nsIContent* aContent) { NS_ENSURE_ARG(aContent); if (mAccessKeys.IndexOf(aContent) == -1) return 0; nsAutoString accessKey; aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey); return accessKey.First(); } void nsEventStateManager::EnsureDocument(nsPresContext* aPresContext) { if (!mDocument) mDocument = aPresContext->Document(); } void nsEventStateManager::FlushPendingEvents(nsPresContext* aPresContext) { NS_PRECONDITION(nsnull != aPresContext, "nsnull ptr"); nsIPresShell *shell = aPresContext->GetPresShell(); if (shell) { shell->FlushPendingNotifications(Flush_InterruptibleLayout); } } nsIContent* nsEventStateManager::GetFocusedContent() { nsIFocusManager* fm = nsFocusManager::GetFocusManager(); if (!fm || !mDocument) return nsnull; nsCOMPtr focusedWindow; return nsFocusManager::GetFocusedDescendant(mDocument->GetWindow(), PR_FALSE, getter_AddRefs(focusedWindow)); } //------------------------------------------------------- // Return PR_TRUE if the docshell is visible PRBool nsEventStateManager::IsShellVisible(nsIDocShell* aShell) { NS_ASSERTION(aShell, "docshell is null"); nsCOMPtr basewin = do_QueryInterface(aShell); if (!basewin) return PR_TRUE; PRBool isVisible = PR_TRUE; basewin->GetVisibility(&isVisible); // We should be doing some additional checks here so that // we don't tab into hidden tabs of tabbrowser. -bryner return isVisible; } nsresult nsEventStateManager::DoContentCommandEvent(nsContentCommandEvent* aEvent) { EnsureDocument(mPresContext); NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE); nsCOMPtr window(mDocument->GetWindow()); NS_ENSURE_TRUE(window, NS_ERROR_FAILURE); nsCOMPtr root = window->GetTopWindowRoot(); NS_ENSURE_TRUE(root, NS_ERROR_FAILURE); const char* cmd; switch (aEvent->message) { case NS_CONTENT_COMMAND_CUT: cmd = "cmd_cut"; break; case NS_CONTENT_COMMAND_COPY: cmd = "cmd_copy"; break; case NS_CONTENT_COMMAND_PASTE: cmd = "cmd_paste"; break; case NS_CONTENT_COMMAND_DELETE: cmd = "cmd_delete"; break; case NS_CONTENT_COMMAND_UNDO: cmd = "cmd_undo"; break; case NS_CONTENT_COMMAND_REDO: cmd = "cmd_redo"; break; case NS_CONTENT_COMMAND_PASTE_TRANSFERABLE: cmd = "cmd_pasteTransferable"; break; default: return NS_ERROR_NOT_IMPLEMENTED; } nsCOMPtr controller; nsresult rv = root->GetControllerForCommand(cmd, getter_AddRefs(controller)); NS_ENSURE_SUCCESS(rv, rv); if (!controller) { // When GetControllerForCommand succeeded but there is no controller, the // command isn't supported. aEvent->mIsEnabled = PR_FALSE; } else { PRBool canDoIt; rv = controller->IsCommandEnabled(cmd, &canDoIt); NS_ENSURE_SUCCESS(rv, rv); aEvent->mIsEnabled = canDoIt; if (canDoIt && !aEvent->mOnlyEnabledCheck) { switch (aEvent->message) { case NS_CONTENT_COMMAND_PASTE_TRANSFERABLE: { nsCOMPtr commandController = do_QueryInterface(controller); NS_ENSURE_STATE(commandController); nsCOMPtr params = do_CreateInstance("@mozilla.org/embedcomp/command-params;1", &rv); NS_ENSURE_SUCCESS(rv, rv); rv = params->SetISupportsValue("transferable", aEvent->mTransferable); NS_ENSURE_SUCCESS(rv, rv); rv = commandController->DoCommandWithParams(cmd, params); break; } default: rv = controller->DoCommand(cmd); break; } NS_ENSURE_SUCCESS(rv, rv); } } aEvent->mSucceeded = PR_TRUE; return NS_OK; } nsresult nsEventStateManager::DoContentCommandScrollEvent(nsContentCommandEvent* aEvent) { NS_ENSURE_TRUE(mPresContext, NS_ERROR_NOT_AVAILABLE); nsIPresShell* ps = mPresContext->GetPresShell(); NS_ENSURE_TRUE(ps, NS_ERROR_NOT_AVAILABLE); NS_ENSURE_TRUE(aEvent->mScroll.mAmount != 0, NS_ERROR_INVALID_ARG); nsIScrollableFrame::ScrollUnit scrollUnit; switch (aEvent->mScroll.mUnit) { case nsContentCommandEvent::eCmdScrollUnit_Line: scrollUnit = nsIScrollableFrame::LINES; break; case nsContentCommandEvent::eCmdScrollUnit_Page: scrollUnit = nsIScrollableFrame::PAGES; break; case nsContentCommandEvent::eCmdScrollUnit_Whole: scrollUnit = nsIScrollableFrame::WHOLE; break; default: return NS_ERROR_INVALID_ARG; } aEvent->mSucceeded = PR_TRUE; nsIScrollableFrame* sf = ps->GetFrameToScrollAsScrollable(nsIPresShell::eEither); aEvent->mIsEnabled = sf ? CanScrollOn(sf, aEvent->mScroll.mAmount, aEvent->mScroll.mIsHorizontal) : PR_FALSE; if (!aEvent->mIsEnabled || aEvent->mOnlyEnabledCheck) { return NS_OK; } nsIntPoint pt(0, 0); if (aEvent->mScroll.mIsHorizontal) { pt.x = aEvent->mScroll.mAmount; } else { pt.y = aEvent->mScroll.mAmount; } // The caller may want synchronous scrolling. sf->ScrollBy(pt, scrollUnit, nsIScrollableFrame::INSTANT); return NS_OK; } void nsEventStateManager::DoQueryScrollTargetInfo(nsQueryContentEvent* aEvent, nsIFrame* aTargetFrame) { nsMouseScrollEvent* msEvent = aEvent->mInput.mMouseScrollEvent; // Don't use high resolution scrolling when user customize the scrolling // speed. if (!UseSystemScrollSettingFor(msEvent)) { return; } nsIScrollableFrame::ScrollUnit unit; PRBool allowOverrideSystemSettings; switch (ComputeWheelActionFor(msEvent, PR_TRUE)) { case MOUSE_SCROLL_N_LINES: unit = nsIScrollableFrame::LINES; allowOverrideSystemSettings = PR_TRUE; break; case MOUSE_SCROLL_PAGE: unit = nsIScrollableFrame::PAGES; allowOverrideSystemSettings = PR_FALSE; break; case MOUSE_SCROLL_PIXELS: unit = nsIScrollableFrame::DEVICE_PIXELS; allowOverrideSystemSettings = PR_FALSE; default: // Don't use high resolution scrolling when the action doesn't scroll // contents. return; } DoScrollText(aTargetFrame, msEvent, unit, allowOverrideSystemSettings, aEvent); } void nsEventStateManager::SetActiveManager(nsEventStateManager* aNewESM, nsIContent* aContent) { if (sActiveESM && aNewESM != sActiveESM) { sActiveESM->SetContentState(nsnull, NS_EVENT_STATE_ACTIVE); } sActiveESM = aNewESM; if (sActiveESM && aContent) { sActiveESM->SetContentState(aContent, NS_EVENT_STATE_ACTIVE); } } void nsEventStateManager::ClearGlobalActiveContent(nsEventStateManager* aClearer) { if (aClearer) { aClearer->SetContentState(nsnull, NS_EVENT_STATE_ACTIVE); } if (sActiveESM && aClearer != sActiveESM) { sActiveESM->SetContentState(nsnull, NS_EVENT_STATE_ACTIVE); } sActiveESM = nsnull; }