зеркало из https://github.com/mozilla/gecko-dev.git
6382 строки
237 KiB
C++
6382 строки
237 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventForwards.h"
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#include "mozilla/EventStateManager.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/HTMLEditor.h"
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#include "mozilla/IMEStateManager.h"
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#include "mozilla/MiscEvents.h"
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#include "mozilla/MathAlgorithms.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/ScrollTypes.h"
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#include "mozilla/TextComposition.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/TextEvents.h"
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#include "mozilla/TouchEvents.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/dom/BrowserBridgeChild.h"
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#include "mozilla/dom/BrowsingContext.h"
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#include "mozilla/dom/CanonicalBrowsingContext.h"
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#include "mozilla/dom/ContentChild.h"
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#include "mozilla/dom/DragEvent.h"
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#include "mozilla/dom/Event.h"
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#include "mozilla/dom/FrameLoaderBinding.h"
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#include "mozilla/dom/MouseEventBinding.h"
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#include "mozilla/dom/BrowserChild.h"
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#include "mozilla/dom/UIEvent.h"
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#include "mozilla/dom/UIEventBinding.h"
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#include "mozilla/dom/UserActivation.h"
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#include "mozilla/dom/WheelEventBinding.h"
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#include "mozilla/StaticPrefs_accessibility.h"
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#include "mozilla/StaticPrefs_dom.h"
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#include "mozilla/StaticPrefs_layout.h"
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#include "mozilla/StaticPrefs_mousewheel.h"
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#include "mozilla/StaticPrefs_plugin.h"
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#include "mozilla/StaticPrefs_ui.h"
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#include "mozilla/StaticPrefs_zoom.h"
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#include "ContentEventHandler.h"
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#include "IMEContentObserver.h"
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#include "WheelHandlingHelper.h"
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#include "RemoteDragStartData.h"
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#include "nsCommandParams.h"
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#include "nsCOMPtr.h"
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#include "nsCopySupport.h"
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#include "nsFocusManager.h"
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#include "nsGenericHTMLElement.h"
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#include "nsIClipboard.h"
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#include "nsIContent.h"
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#include "nsIContentInlines.h"
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#include "mozilla/dom/Document.h"
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#include "nsIFrame.h"
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#include "nsFrameLoaderOwner.h"
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#include "nsIWidget.h"
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#include "nsLiteralString.h"
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#include "nsPresContext.h"
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#include "nsGkAtoms.h"
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#include "nsIFormControl.h"
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#include "nsComboboxControlFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsIDOMXULControlElement.h"
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#include "nsNameSpaceManager.h"
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#include "nsIBaseWindow.h"
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#include "nsFrameSelection.h"
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#include "nsPIDOMWindow.h"
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#include "nsPIWindowRoot.h"
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#include "nsIWebNavigation.h"
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#include "nsIContentViewer.h"
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#include "nsFrameManager.h"
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#include "nsIBrowserChild.h"
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#include "nsPluginFrame.h"
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#include "nsMenuPopupFrame.h"
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#include "nsIObserverService.h"
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#include "nsIDocShell.h"
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#include "nsSubDocumentFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsContentUtils.h"
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#include "imgIContainer.h"
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#include "nsIProperties.h"
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#include "nsISupportsPrimitives.h"
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#include "nsServiceManagerUtils.h"
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#include "nsITimer.h"
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#include "nsFontMetrics.h"
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#include "nsIDragService.h"
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#include "nsIDragSession.h"
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#include "mozilla/dom/DataTransfer.h"
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#include "nsContentAreaDragDrop.h"
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#ifdef MOZ_XUL
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# include "nsTreeBodyFrame.h"
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#endif
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#include "nsIController.h"
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#include "mozilla/Services.h"
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#include "mozilla/dom/ContentParent.h"
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#include "mozilla/dom/HTMLLabelElement.h"
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#include "mozilla/dom/Selection.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/LookAndFeel.h"
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#include "GeckoProfiler.h"
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#include "Units.h"
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#ifdef XP_MACOSX
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# import <ApplicationServices/ApplicationServices.h>
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#endif
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namespace mozilla {
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using namespace dom;
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static const LayoutDeviceIntPoint kInvalidRefPoint =
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LayoutDeviceIntPoint(-1, -1);
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static uint32_t gMouseOrKeyboardEventCounter = 0;
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static nsITimer* gUserInteractionTimer = nullptr;
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static nsITimerCallback* gUserInteractionTimerCallback = nullptr;
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static const double kCursorLoadingTimeout = 1000; // ms
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static AutoWeakFrame gLastCursorSourceFrame;
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static TimeStamp gLastCursorUpdateTime;
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static inline int32_t RoundDown(double aDouble) {
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return (aDouble > 0) ? static_cast<int32_t>(floor(aDouble))
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: static_cast<int32_t>(ceil(aDouble));
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}
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static UniquePtr<WidgetMouseEvent> CreateMouseOrPointerWidgetEvent(
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WidgetMouseEvent* aMouseEvent, EventMessage aMessage,
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EventTarget* aRelatedTarget);
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/******************************************************************/
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/* mozilla::UITimerCallback */
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/******************************************************************/
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class UITimerCallback final : public nsITimerCallback, public nsINamed {
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public:
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UITimerCallback() : mPreviousCount(0) {}
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NS_DECL_ISUPPORTS
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NS_DECL_NSITIMERCALLBACK
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NS_DECL_NSINAMED
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private:
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~UITimerCallback() = default;
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uint32_t mPreviousCount;
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};
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NS_IMPL_ISUPPORTS(UITimerCallback, nsITimerCallback, nsINamed)
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// If aTimer is nullptr, this method always sends "user-interaction-inactive"
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// notification.
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NS_IMETHODIMP
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UITimerCallback::Notify(nsITimer* aTimer) {
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nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
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if (!obs) return NS_ERROR_FAILURE;
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if ((gMouseOrKeyboardEventCounter == mPreviousCount) || !aTimer) {
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gMouseOrKeyboardEventCounter = 0;
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obs->NotifyObservers(nullptr, "user-interaction-inactive", nullptr);
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if (gUserInteractionTimer) {
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gUserInteractionTimer->Cancel();
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NS_RELEASE(gUserInteractionTimer);
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}
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} else {
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obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
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EventStateManager::UpdateUserActivityTimer();
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}
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mPreviousCount = gMouseOrKeyboardEventCounter;
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return NS_OK;
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}
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NS_IMETHODIMP
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UITimerCallback::GetName(nsACString& aName) {
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aName.AssignLiteral("UITimerCallback_timer");
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return NS_OK;
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}
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/******************************************************************/
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/* mozilla::OverOutElementsWrapper */
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/******************************************************************/
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OverOutElementsWrapper::OverOutElementsWrapper() : mLastOverFrame(nullptr) {}
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OverOutElementsWrapper::~OverOutElementsWrapper() = default;
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NS_IMPL_CYCLE_COLLECTION(OverOutElementsWrapper, mLastOverElement,
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mFirstOverEventElement, mFirstOutEventElement)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(OverOutElementsWrapper)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(OverOutElementsWrapper)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(OverOutElementsWrapper)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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/******************************************************************/
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/* mozilla::EventStateManager */
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/******************************************************************/
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static uint32_t sESMInstanceCount = 0;
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bool EventStateManager::sNormalLMouseEventInProcess = false;
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int16_t EventStateManager::sCurrentMouseBtn = MouseButton::eNotPressed;
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EventStateManager* EventStateManager::sActiveESM = nullptr;
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Document* EventStateManager::sMouseOverDocument = nullptr;
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AutoWeakFrame EventStateManager::sLastDragOverFrame = nullptr;
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LayoutDeviceIntPoint EventStateManager::sPreLockPoint =
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LayoutDeviceIntPoint(0, 0);
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LayoutDeviceIntPoint EventStateManager::sLastRefPoint = kInvalidRefPoint;
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CSSIntPoint EventStateManager::sLastScreenPoint = CSSIntPoint(0, 0);
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LayoutDeviceIntPoint EventStateManager::sSynthCenteringPoint = kInvalidRefPoint;
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CSSIntPoint EventStateManager::sLastClientPoint = CSSIntPoint(0, 0);
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bool EventStateManager::sIsPointerLocked = false;
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// Reference to the pointer locked element.
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nsWeakPtr EventStateManager::sPointerLockedElement;
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// Reference to the document which requested pointer lock.
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nsWeakPtr EventStateManager::sPointerLockedDoc;
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nsCOMPtr<nsIContent> EventStateManager::sDragOverContent = nullptr;
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EventStateManager::WheelPrefs* EventStateManager::WheelPrefs::sInstance =
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nullptr;
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EventStateManager::DeltaAccumulator*
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EventStateManager::DeltaAccumulator::sInstance = nullptr;
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constexpr const StyleCursorKind kInvalidCursorKind =
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static_cast<StyleCursorKind>(255);
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EventStateManager::EventStateManager()
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: mLockCursor(kInvalidCursorKind),
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mLastFrameConsumedSetCursor(false),
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mCurrentTarget(nullptr),
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// init d&d gesture state machine variables
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mGestureDownPoint(0, 0),
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mGestureModifiers(0),
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mGestureDownButtons(0),
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mPresContext(nullptr),
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mLClickCount(0),
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mMClickCount(0),
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mRClickCount(0),
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mInTouchDrag(false),
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m_haveShutdown(false) {
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if (sESMInstanceCount == 0) {
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gUserInteractionTimerCallback = new UITimerCallback();
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if (gUserInteractionTimerCallback) NS_ADDREF(gUserInteractionTimerCallback);
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UpdateUserActivityTimer();
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}
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++sESMInstanceCount;
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}
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nsresult EventStateManager::UpdateUserActivityTimer() {
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if (!gUserInteractionTimerCallback) return NS_OK;
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if (!gUserInteractionTimer) {
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gUserInteractionTimer = NS_NewTimer().take();
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}
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if (gUserInteractionTimer) {
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gUserInteractionTimer->InitWithCallback(
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gUserInteractionTimerCallback,
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StaticPrefs::dom_events_user_interaction_interval(),
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nsITimer::TYPE_ONE_SHOT);
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}
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return NS_OK;
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}
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nsresult EventStateManager::Init() {
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (!observerService) return NS_ERROR_FAILURE;
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observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, true);
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return NS_OK;
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}
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EventStateManager::~EventStateManager() {
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ReleaseCurrentIMEContentObserver();
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if (sActiveESM == this) {
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sActiveESM = nullptr;
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}
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if (StaticPrefs::ui_click_hold_context_menus()) {
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KillClickHoldTimer();
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}
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if (mDocument == sMouseOverDocument) {
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sMouseOverDocument = nullptr;
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}
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--sESMInstanceCount;
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if (sESMInstanceCount == 0) {
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WheelTransaction::Shutdown();
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if (gUserInteractionTimerCallback) {
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gUserInteractionTimerCallback->Notify(nullptr);
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NS_RELEASE(gUserInteractionTimerCallback);
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}
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if (gUserInteractionTimer) {
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gUserInteractionTimer->Cancel();
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NS_RELEASE(gUserInteractionTimer);
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}
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WheelPrefs::Shutdown();
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DeltaAccumulator::Shutdown();
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}
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if (sDragOverContent && sDragOverContent->OwnerDoc() == mDocument) {
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sDragOverContent = nullptr;
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}
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if (!m_haveShutdown) {
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Shutdown();
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// Don't remove from Observer service in Shutdown because Shutdown also
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// gets called from xpcom shutdown observer. And we don't want to remove
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// from the service in that case.
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (observerService) {
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observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
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}
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}
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}
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nsresult EventStateManager::Shutdown() {
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m_haveShutdown = true;
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return NS_OK;
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}
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NS_IMETHODIMP
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EventStateManager::Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* someData) {
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if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
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Shutdown();
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}
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return NS_OK;
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}
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EventStateManager)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
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NS_INTERFACE_MAP_ENTRY(nsIObserver)
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NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(EventStateManager)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(EventStateManager)
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NS_IMPL_CYCLE_COLLECTION_WEAK(EventStateManager, mCurrentTargetContent,
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mGestureDownContent, mGestureDownFrameOwner,
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mLastLeftMouseDownContent,
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mLastMiddleMouseDownContent,
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mLastRightMouseDownContent, mActiveContent,
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mHoverContent, mURLTargetContent,
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mMouseEnterLeaveHelper, mPointersEnterLeaveHelper,
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mDocument, mIMEContentObserver, mAccessKeys)
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void EventStateManager::ReleaseCurrentIMEContentObserver() {
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if (mIMEContentObserver) {
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mIMEContentObserver->DisconnectFromEventStateManager();
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}
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mIMEContentObserver = nullptr;
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}
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void EventStateManager::OnStartToObserveContent(
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IMEContentObserver* aIMEContentObserver) {
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if (mIMEContentObserver == aIMEContentObserver) {
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return;
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}
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ReleaseCurrentIMEContentObserver();
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mIMEContentObserver = aIMEContentObserver;
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}
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void EventStateManager::OnStopObservingContent(
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IMEContentObserver* aIMEContentObserver) {
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aIMEContentObserver->DisconnectFromEventStateManager();
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NS_ENSURE_TRUE_VOID(mIMEContentObserver == aIMEContentObserver);
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mIMEContentObserver = nullptr;
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}
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void EventStateManager::TryToFlushPendingNotificationsToIME() {
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if (mIMEContentObserver) {
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mIMEContentObserver->TryToFlushPendingNotifications(true);
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}
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}
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static bool IsMessageMouseUserActivity(EventMessage aMessage) {
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return aMessage == eMouseMove || aMessage == eMouseUp ||
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aMessage == eMouseDown || aMessage == eMouseAuxClick ||
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aMessage == eMouseDoubleClick || aMessage == eMouseClick ||
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aMessage == eMouseActivate || aMessage == eMouseLongTap;
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}
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static bool IsMessageGamepadUserActivity(EventMessage aMessage) {
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return aMessage == eGamepadButtonDown || aMessage == eGamepadButtonUp ||
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aMessage == eGamepadAxisMove;
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}
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// We ignore things that shouldn't cause popups, but also things that look
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// like shortcut presses. In some obscure cases these may actually be
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// website input, but any meaningful website will have other input anyway,
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// and we can't very well tell whether shortcut input was supposed to be
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// directed at chrome or the document.
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static bool IsKeyboardEventUserActivity(WidgetEvent* aEvent) {
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WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
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// Access keys should be treated as page interaction.
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if (keyEvent->ModifiersMatchWithAccessKey(AccessKeyType::eContent)) {
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return true;
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}
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if (!keyEvent->CanTreatAsUserInput() || keyEvent->IsControl() ||
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keyEvent->IsMeta() || keyEvent->IsOS() || keyEvent->IsAlt()) {
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return false;
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}
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// Deal with function keys:
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switch (keyEvent->mKeyNameIndex) {
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case KEY_NAME_INDEX_F1:
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case KEY_NAME_INDEX_F2:
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case KEY_NAME_INDEX_F3:
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case KEY_NAME_INDEX_F4:
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case KEY_NAME_INDEX_F5:
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case KEY_NAME_INDEX_F6:
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case KEY_NAME_INDEX_F7:
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case KEY_NAME_INDEX_F8:
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case KEY_NAME_INDEX_F9:
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case KEY_NAME_INDEX_F10:
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case KEY_NAME_INDEX_F11:
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case KEY_NAME_INDEX_F12:
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case KEY_NAME_INDEX_F13:
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case KEY_NAME_INDEX_F14:
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case KEY_NAME_INDEX_F15:
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case KEY_NAME_INDEX_F16:
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case KEY_NAME_INDEX_F17:
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case KEY_NAME_INDEX_F18:
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case KEY_NAME_INDEX_F19:
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case KEY_NAME_INDEX_F20:
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case KEY_NAME_INDEX_F21:
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case KEY_NAME_INDEX_F22:
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case KEY_NAME_INDEX_F23:
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case KEY_NAME_INDEX_F24:
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return false;
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default:
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return true;
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}
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}
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nsresult EventStateManager::PreHandleEvent(nsPresContext* aPresContext,
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WidgetEvent* aEvent,
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nsIFrame* aTargetFrame,
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nsIContent* aTargetContent,
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nsEventStatus* aStatus,
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nsIContent* aOverrideClickTarget) {
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NS_ENSURE_ARG_POINTER(aStatus);
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NS_ENSURE_ARG(aPresContext);
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if (!aEvent) {
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NS_ERROR("aEvent is null. This should never happen.");
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return NS_ERROR_NULL_POINTER;
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}
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NS_WARNING_ASSERTION(
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!aTargetFrame || !aTargetFrame->GetContent() ||
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aTargetFrame->GetContent() == aTargetContent ||
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aTargetFrame->GetContent()->GetFlattenedTreeParent() ==
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aTargetContent ||
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aTargetFrame->IsGeneratedContentFrame(),
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"aTargetFrame should be related with aTargetContent");
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#if DEBUG
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if (aTargetFrame && aTargetFrame->IsGeneratedContentFrame()) {
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nsCOMPtr<nsIContent> targetContent;
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aTargetFrame->GetContentForEvent(aEvent, getter_AddRefs(targetContent));
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MOZ_ASSERT(aTargetContent == targetContent,
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"Unexpected target for generated content frame!");
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}
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#endif
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mCurrentTarget = aTargetFrame;
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mCurrentTargetContent = nullptr;
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// Do not take account eMouseEnterIntoWidget/ExitFromWidget so that loading
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// a page when user is not active doesn't change the state to active.
|
|
WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
|
|
if (aEvent->IsTrusted() &&
|
|
((mouseEvent && mouseEvent->IsReal() &&
|
|
IsMessageMouseUserActivity(mouseEvent->mMessage)) ||
|
|
aEvent->mClass == eWheelEventClass ||
|
|
aEvent->mClass == ePointerEventClass ||
|
|
aEvent->mClass == eTouchEventClass ||
|
|
aEvent->mClass == eKeyboardEventClass ||
|
|
(aEvent->mClass == eDragEventClass && aEvent->mMessage == eDrop) ||
|
|
IsMessageGamepadUserActivity(aEvent->mMessage))) {
|
|
if (gMouseOrKeyboardEventCounter == 0) {
|
|
nsCOMPtr<nsIObserverService> obs =
|
|
mozilla::services::GetObserverService();
|
|
if (obs) {
|
|
obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
|
|
UpdateUserActivityTimer();
|
|
}
|
|
}
|
|
++gMouseOrKeyboardEventCounter;
|
|
|
|
nsCOMPtr<nsINode> node = aTargetContent;
|
|
if (node &&
|
|
((aEvent->mMessage == eKeyUp && IsKeyboardEventUserActivity(aEvent)) ||
|
|
aEvent->mMessage == eMouseUp || aEvent->mMessage == eWheel ||
|
|
aEvent->mMessage == eTouchEnd || aEvent->mMessage == ePointerUp ||
|
|
aEvent->mMessage == eDrop)) {
|
|
Document* doc = node->OwnerDoc();
|
|
while (doc) {
|
|
doc->SetUserHasInteracted();
|
|
doc = nsContentUtils::IsChildOfSameType(doc)
|
|
? doc->GetInProcessParentDocument()
|
|
: nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
WheelTransaction::OnEvent(aEvent);
|
|
|
|
// Focus events don't necessarily need a frame.
|
|
if (!mCurrentTarget && !aTargetContent) {
|
|
NS_ERROR("mCurrentTarget and aTargetContent are null");
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
#ifdef DEBUG
|
|
if (aEvent->HasDragEventMessage() && sIsPointerLocked) {
|
|
NS_ASSERTION(
|
|
sIsPointerLocked,
|
|
"sIsPointerLocked is true. Drag events should be suppressed when "
|
|
"the pointer is locked.");
|
|
}
|
|
#endif
|
|
// Store last known screenPoint and clientPoint so pointer lock
|
|
// can use these values as constants.
|
|
if (aEvent->IsTrusted() &&
|
|
((mouseEvent && mouseEvent->IsReal()) ||
|
|
aEvent->mClass == eWheelEventClass) &&
|
|
!sIsPointerLocked) {
|
|
sLastScreenPoint =
|
|
Event::GetScreenCoords(aPresContext, aEvent, aEvent->mRefPoint);
|
|
sLastClientPoint = Event::GetClientCoords(
|
|
aPresContext, aEvent, aEvent->mRefPoint, CSSIntPoint(0, 0));
|
|
}
|
|
|
|
*aStatus = nsEventStatus_eIgnore;
|
|
|
|
if (aEvent->mClass == eQueryContentEventClass) {
|
|
HandleQueryContentEvent(aEvent->AsQueryContentEvent());
|
|
return NS_OK;
|
|
}
|
|
|
|
WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent();
|
|
if (touchEvent && mInTouchDrag) {
|
|
if (touchEvent->mMessage == eTouchMove) {
|
|
GenerateDragGesture(aPresContext, touchEvent);
|
|
} else {
|
|
mInTouchDrag = false;
|
|
StopTrackingDragGesture(true);
|
|
}
|
|
}
|
|
|
|
PointerEventHandler::UpdateActivePointerState(mouseEvent);
|
|
|
|
switch (aEvent->mMessage) {
|
|
case eContextMenu:
|
|
if (sIsPointerLocked) {
|
|
return NS_ERROR_DOM_INVALID_STATE_ERR;
|
|
}
|
|
break;
|
|
case eMouseTouchDrag:
|
|
mInTouchDrag = true;
|
|
BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
|
|
break;
|
|
case eMouseDown: {
|
|
switch (mouseEvent->mButton) {
|
|
case MouseButton::ePrimary:
|
|
BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
|
|
mLClickCount = mouseEvent->mClickCount;
|
|
SetClickCount(mouseEvent, aStatus);
|
|
sNormalLMouseEventInProcess = true;
|
|
break;
|
|
case MouseButton::eMiddle:
|
|
mMClickCount = mouseEvent->mClickCount;
|
|
SetClickCount(mouseEvent, aStatus);
|
|
break;
|
|
case MouseButton::eSecondary:
|
|
mRClickCount = mouseEvent->mClickCount;
|
|
SetClickCount(mouseEvent, aStatus);
|
|
break;
|
|
}
|
|
NotifyTargetUserActivation(aEvent, aTargetContent);
|
|
break;
|
|
}
|
|
case eMouseUp: {
|
|
switch (mouseEvent->mButton) {
|
|
case MouseButton::ePrimary:
|
|
if (StaticPrefs::ui_click_hold_context_menus()) {
|
|
KillClickHoldTimer();
|
|
}
|
|
mInTouchDrag = false;
|
|
StopTrackingDragGesture(true);
|
|
sNormalLMouseEventInProcess = false;
|
|
// then fall through...
|
|
[[fallthrough]];
|
|
case MouseButton::eSecondary:
|
|
case MouseButton::eMiddle:
|
|
RefPtr<EventStateManager> esm =
|
|
ESMFromContentOrThis(aOverrideClickTarget);
|
|
esm->SetClickCount(mouseEvent, aStatus, aOverrideClickTarget);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case eMouseEnterIntoWidget:
|
|
// In some cases on e10s eMouseEnterIntoWidget
|
|
// event was sent twice into child process of content.
|
|
// (From specific widget code (sending is not permanent) and
|
|
// from ESM::DispatchMouseOrPointerEvent (sending is permanent)).
|
|
// IsCrossProcessForwardingStopped() helps to suppress sending accidental
|
|
// event from widget code.
|
|
aEvent->StopCrossProcessForwarding();
|
|
break;
|
|
case eMouseExitFromWidget:
|
|
// If this is a remote frame, we receive eMouseExitFromWidget from the
|
|
// parent the mouse exits our content. Since the parent may update the
|
|
// cursor while the mouse is outside our frame, and since PuppetWidget
|
|
// caches the current cursor internally, re-entering our content (say from
|
|
// over a window edge) wont update the cursor if the cached value and the
|
|
// current cursor match. So when the mouse exits a remote frame, clear the
|
|
// cached widget cursor so a proper update will occur when the mouse
|
|
// re-enters.
|
|
if (XRE_IsContentProcess()) {
|
|
ClearCachedWidgetCursor(mCurrentTarget);
|
|
}
|
|
|
|
// IsCrossProcessForwardingStopped() helps to suppress double event
|
|
// sending into process of content. For more information see comment
|
|
// above, at eMouseEnterIntoWidget case.
|
|
aEvent->StopCrossProcessForwarding();
|
|
|
|
// If the event is not a top-level window or puppet widget exit, then it's
|
|
// not really an exit --- we may have traversed widget boundaries but
|
|
// we're still in our toplevel window or puppet widget.
|
|
if (mouseEvent->mExitFrom.value() != WidgetMouseEvent::eTopLevel &&
|
|
mouseEvent->mExitFrom.value() != WidgetMouseEvent::ePuppet) {
|
|
// 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->mMessage = eMouseMove;
|
|
mouseEvent->mReason = WidgetMouseEvent::eSynthesized;
|
|
// then fall through...
|
|
} else {
|
|
MOZ_ASSERT_IF(XRE_IsParentProcess(), mouseEvent->mExitFrom.value() ==
|
|
WidgetMouseEvent::eTopLevel);
|
|
MOZ_ASSERT_IF(XRE_IsContentProcess(), mouseEvent->mExitFrom.value() ==
|
|
WidgetMouseEvent::ePuppet);
|
|
// We should synthetize corresponding pointer events
|
|
GeneratePointerEnterExit(ePointerLeave, mouseEvent);
|
|
GenerateMouseEnterExit(mouseEvent);
|
|
// This is really an exit and should stop here
|
|
aEvent->mMessage = eVoidEvent;
|
|
break;
|
|
}
|
|
[[fallthrough]];
|
|
case eMouseMove:
|
|
case ePointerDown:
|
|
if (aEvent->mMessage == ePointerDown) {
|
|
PointerEventHandler::ImplicitlyCapturePointer(aTargetFrame, aEvent);
|
|
if (mouseEvent->mInputSource != MouseEvent_Binding::MOZ_SOURCE_TOUCH) {
|
|
NotifyTargetUserActivation(aEvent, aTargetContent);
|
|
}
|
|
}
|
|
[[fallthrough]];
|
|
case ePointerMove: {
|
|
// 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().
|
|
if (!mInTouchDrag) {
|
|
GenerateDragGesture(aPresContext, mouseEvent);
|
|
}
|
|
UpdateCursor(aPresContext, aEvent, mCurrentTarget, aStatus);
|
|
|
|
UpdateLastRefPointOfMouseEvent(mouseEvent);
|
|
if (sIsPointerLocked) {
|
|
ResetPointerToWindowCenterWhilePointerLocked(mouseEvent);
|
|
}
|
|
UpdateLastPointerPosition(mouseEvent);
|
|
|
|
GenerateMouseEnterExit(mouseEvent);
|
|
// Flush pending layout changes, so that later mouse move events
|
|
// will go to the right nodes.
|
|
FlushLayout(aPresContext);
|
|
break;
|
|
}
|
|
case ePointerGotCapture:
|
|
GenerateMouseEnterExit(mouseEvent);
|
|
break;
|
|
case eDragStart:
|
|
if (StaticPrefs::ui_click_hold_context_menus()) {
|
|
// 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 eDragOver: {
|
|
WidgetDragEvent* dragEvent = aEvent->AsDragEvent();
|
|
MOZ_ASSERT(dragEvent);
|
|
if (dragEvent->mFlags.mIsSynthesizedForTests) {
|
|
dragEvent->InitDropEffectForTests();
|
|
}
|
|
// Send the enter/exit events before eDrop.
|
|
GenerateDragDropEnterExit(aPresContext, dragEvent);
|
|
break;
|
|
}
|
|
case eDrop:
|
|
if (aEvent->mFlags.mIsSynthesizedForTests) {
|
|
MOZ_ASSERT(aEvent->AsDragEvent());
|
|
aEvent->AsDragEvent()->InitDropEffectForTests();
|
|
}
|
|
break;
|
|
|
|
case eKeyPress: {
|
|
WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
|
|
if (keyEvent->ModifiersMatchWithAccessKey(AccessKeyType::eChrome) ||
|
|
keyEvent->ModifiersMatchWithAccessKey(AccessKeyType::eContent)) {
|
|
// If the eKeyPress event will be sent to a remote process, this
|
|
// process needs to wait reply from the remote process for checking if
|
|
// preceding eKeyDown event is consumed. If preceding eKeyDown event
|
|
// is consumed in the remote process, BrowserChild won't send the event
|
|
// back to this process. So, only when this process receives a reply
|
|
// eKeyPress event in BrowserParent, we should handle accesskey in this
|
|
// process.
|
|
if (IsTopLevelRemoteTarget(GetFocusedContent())) {
|
|
// However, if there is no accesskey target for the key combination,
|
|
// we don't need to wait reply from the remote process. Otherwise,
|
|
// Mark the event as waiting reply from remote process and stop
|
|
// propagation in this process.
|
|
if (CheckIfEventMatchesAccessKey(keyEvent, aPresContext)) {
|
|
keyEvent->StopPropagation();
|
|
keyEvent->MarkAsWaitingReplyFromRemoteProcess();
|
|
}
|
|
}
|
|
// If the event target is in this process, we can handle accesskey now
|
|
// since if preceding eKeyDown event was consumed, eKeyPress event
|
|
// won't be dispatched by widget. So, coming eKeyPress event means
|
|
// that the preceding eKeyDown event wasn't consumed in this case.
|
|
else {
|
|
AutoTArray<uint32_t, 10> accessCharCodes;
|
|
keyEvent->GetAccessKeyCandidates(accessCharCodes);
|
|
|
|
if (HandleAccessKey(keyEvent, aPresContext, accessCharCodes)) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// then fall through...
|
|
[[fallthrough]];
|
|
case eKeyDown:
|
|
if (aEvent->mMessage == eKeyDown) {
|
|
NotifyTargetUserActivation(aEvent, aTargetContent);
|
|
}
|
|
[[fallthrough]];
|
|
case eKeyUp: {
|
|
nsIContent* content = GetFocusedContent();
|
|
if (content) mCurrentTargetContent = content;
|
|
|
|
// NOTE: Don't refer TextComposition::IsComposing() since UI Events
|
|
// defines that KeyboardEvent.isComposing is true when it's
|
|
// dispatched after compositionstart and compositionend.
|
|
// TextComposition::IsComposing() is false even before
|
|
// compositionend if there is no composing string.
|
|
// And also don't expose other document's composition state.
|
|
// A native IME context is typically shared by multiple documents.
|
|
// So, don't use GetTextCompositionFor(nsIWidget*) here.
|
|
RefPtr<TextComposition> composition =
|
|
IMEStateManager::GetTextCompositionFor(aPresContext);
|
|
aEvent->AsKeyboardEvent()->mIsComposing = !!composition;
|
|
|
|
// Widget may need to perform default action for specific keyboard
|
|
// event if it's not consumed. In this case, widget has already marked
|
|
// the event as "waiting reply from remote process". However, we need
|
|
// to reset it if the target (focused content) isn't in a remote process
|
|
// because PresShell needs to check if it's marked as so before
|
|
// dispatching events into the DOM tree.
|
|
if (aEvent->IsWaitingReplyFromRemoteProcess() &&
|
|
!aEvent->PropagationStopped() && !IsTopLevelRemoteTarget(content)) {
|
|
aEvent->ResetWaitingReplyFromRemoteProcessState();
|
|
}
|
|
} break;
|
|
case eWheel:
|
|
case eWheelOperationStart:
|
|
case eWheelOperationEnd: {
|
|
NS_ASSERTION(aEvent->IsTrusted(),
|
|
"Untrusted wheel event shouldn't be here");
|
|
|
|
nsIContent* content = GetFocusedContent();
|
|
if (content) {
|
|
mCurrentTargetContent = content;
|
|
}
|
|
|
|
if (aEvent->mMessage != eWheel) {
|
|
break;
|
|
}
|
|
|
|
WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
|
|
WheelPrefs::GetInstance()->ApplyUserPrefsToDelta(wheelEvent);
|
|
|
|
// If we won't dispatch a DOM event for this event, nothing to do anymore.
|
|
if (!wheelEvent->IsAllowedToDispatchDOMEvent()) {
|
|
break;
|
|
}
|
|
|
|
// Init lineOrPageDelta values for line scroll events for some devices
|
|
// on some platforms which might dispatch wheel events which don't have
|
|
// lineOrPageDelta values. And also, if delta values are customized by
|
|
// prefs, this recomputes them.
|
|
DeltaAccumulator::GetInstance()->InitLineOrPageDelta(aTargetFrame, this,
|
|
wheelEvent);
|
|
} break;
|
|
case eSetSelection: {
|
|
nsCOMPtr<nsIContent> focusedContent = GetFocusedContent();
|
|
IMEStateManager::HandleSelectionEvent(aPresContext, focusedContent,
|
|
aEvent->AsSelectionEvent());
|
|
break;
|
|
}
|
|
case eContentCommandCut:
|
|
case eContentCommandCopy:
|
|
case eContentCommandPaste:
|
|
case eContentCommandDelete:
|
|
case eContentCommandUndo:
|
|
case eContentCommandRedo:
|
|
case eContentCommandPasteTransferable:
|
|
case eContentCommandLookUpDictionary:
|
|
DoContentCommandEvent(aEvent->AsContentCommandEvent());
|
|
break;
|
|
case eContentCommandScroll:
|
|
DoContentCommandScrollEvent(aEvent->AsContentCommandEvent());
|
|
break;
|
|
case eCompositionStart:
|
|
if (aEvent->IsTrusted()) {
|
|
// If the event is trusted event, set the selected text to data of
|
|
// composition event.
|
|
WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
|
|
WidgetQueryContentEvent selectedText(true, eQuerySelectedText,
|
|
compositionEvent->mWidget);
|
|
HandleQueryContentEvent(&selectedText);
|
|
NS_ASSERTION(selectedText.mSucceeded, "Failed to get selected text");
|
|
compositionEvent->mData = selectedText.mReply.mString;
|
|
}
|
|
break;
|
|
case eTouchStart:
|
|
SetGestureDownPoint(aEvent->AsTouchEvent());
|
|
break;
|
|
case eTouchEnd:
|
|
NotifyTargetUserActivation(aEvent, aTargetContent);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void EventStateManager::NotifyTargetUserActivation(WidgetEvent* aEvent,
|
|
nsIContent* aTargetContent) {
|
|
if (!aEvent->IsTrusted()) {
|
|
return;
|
|
}
|
|
|
|
WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
|
|
if (mouseEvent && !mouseEvent->IsReal()) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> node = aTargetContent;
|
|
if (!node) {
|
|
return;
|
|
}
|
|
|
|
Document* doc = node->OwnerDoc();
|
|
if (!doc) {
|
|
return;
|
|
}
|
|
|
|
// Don't gesture activate for key events for keys which are likely
|
|
// to be interaction with the browser, OS.
|
|
WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
|
|
if (keyEvent && !keyEvent->CanUserGestureActivateTarget()) {
|
|
return;
|
|
}
|
|
|
|
// Touch gestures that end outside the drag target were touches that turned
|
|
// into scroll/pan/swipe actions. We don't want to gesture activate on such
|
|
// actions, we want to only gesture activate on touches that are taps.
|
|
// That is, touches that end in roughly the same place that they started.
|
|
if (aEvent->mMessage == eTouchEnd && aEvent->AsTouchEvent() &&
|
|
IsEventOutsideDragThreshold(aEvent->AsTouchEvent())) {
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(aEvent->mMessage == eKeyDown || aEvent->mMessage == eMouseDown ||
|
|
aEvent->mMessage == ePointerDown || aEvent->mMessage == eTouchEnd);
|
|
doc->NotifyUserGestureActivation();
|
|
}
|
|
|
|
already_AddRefed<EventStateManager> EventStateManager::ESMFromContentOrThis(
|
|
nsIContent* aContent) {
|
|
if (aContent) {
|
|
PresShell* presShell = aContent->OwnerDoc()->GetPresShell();
|
|
if (presShell) {
|
|
nsPresContext* prescontext = presShell->GetPresContext();
|
|
if (prescontext) {
|
|
RefPtr<EventStateManager> esm = prescontext->EventStateManager();
|
|
if (esm) {
|
|
return esm.forget();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
RefPtr<EventStateManager> esm = this;
|
|
return esm.forget();
|
|
}
|
|
|
|
void EventStateManager::HandleQueryContentEvent(
|
|
WidgetQueryContentEvent* aEvent) {
|
|
switch (aEvent->mMessage) {
|
|
case eQuerySelectedText:
|
|
case eQueryTextContent:
|
|
case eQueryCaretRect:
|
|
case eQueryTextRect:
|
|
case eQueryEditorRect:
|
|
if (!IsTargetCrossProcess(aEvent)) {
|
|
break;
|
|
}
|
|
// Will not be handled locally, remote the event
|
|
GetCrossProcessTarget()->HandleQueryContentEvent(*aEvent);
|
|
return;
|
|
// Following events have not been supported in e10s mode yet.
|
|
case eQueryContentState:
|
|
case eQuerySelectionAsTransferable:
|
|
case eQueryCharacterAtPoint:
|
|
case eQueryDOMWidgetHittest:
|
|
case eQueryTextRectArray:
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
// If there is an IMEContentObserver, we need to handle QueryContentEvent
|
|
// with it.
|
|
if (mIMEContentObserver) {
|
|
RefPtr<IMEContentObserver> contentObserver = mIMEContentObserver;
|
|
contentObserver->HandleQueryContentEvent(aEvent);
|
|
return;
|
|
}
|
|
|
|
ContentEventHandler handler(mPresContext);
|
|
handler.HandleQueryContentEvent(aEvent);
|
|
}
|
|
|
|
static AccessKeyType GetAccessKeyTypeFor(nsISupports* aDocShell) {
|
|
nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryInterface(aDocShell));
|
|
if (!treeItem) {
|
|
return AccessKeyType::eNone;
|
|
}
|
|
|
|
switch (treeItem->ItemType()) {
|
|
case nsIDocShellTreeItem::typeChrome:
|
|
return AccessKeyType::eChrome;
|
|
case nsIDocShellTreeItem::typeContent:
|
|
return AccessKeyType::eContent;
|
|
default:
|
|
return AccessKeyType::eNone;
|
|
}
|
|
}
|
|
|
|
static bool IsAccessKeyTarget(nsIContent* aContent, nsIFrame* aFrame,
|
|
nsAString& aKey) {
|
|
// Use GetAttr because we want Unicode case=insensitive matching
|
|
// XXXbz shouldn't this be case-sensitive, per spec?
|
|
nsString contentKey;
|
|
if (!aContent->IsElement() ||
|
|
!aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey,
|
|
contentKey) ||
|
|
!contentKey.Equals(aKey, nsCaseInsensitiveStringComparator))
|
|
return false;
|
|
|
|
if (!aContent->IsXULElement()) return true;
|
|
|
|
// For XUL we do visibility checks.
|
|
if (!aFrame) return false;
|
|
|
|
if (aFrame->IsFocusable()) return true;
|
|
|
|
if (!aFrame->IsVisibleConsideringAncestors()) return false;
|
|
|
|
// XUL controls can be activated.
|
|
nsCOMPtr<nsIDOMXULControlElement> control =
|
|
aContent->AsElement()->AsXULControl();
|
|
if (control) return true;
|
|
|
|
// HTML area, label and legend elements are never focusable, so
|
|
// we need to check for them explicitly before giving up.
|
|
if (aContent->IsAnyOfHTMLElements(nsGkAtoms::area, nsGkAtoms::label,
|
|
nsGkAtoms::legend)) {
|
|
return true;
|
|
}
|
|
|
|
// XUL label elements are never focusable, so we need to check for them
|
|
// explicitly before giving up.
|
|
if (aContent->IsXULElement(nsGkAtoms::label)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool EventStateManager::CheckIfEventMatchesAccessKey(
|
|
WidgetKeyboardEvent* aEvent, nsPresContext* aPresContext) {
|
|
AutoTArray<uint32_t, 10> accessCharCodes;
|
|
aEvent->GetAccessKeyCandidates(accessCharCodes);
|
|
return WalkESMTreeToHandleAccessKey(const_cast<WidgetKeyboardEvent*>(aEvent),
|
|
aPresContext, accessCharCodes, nullptr,
|
|
eAccessKeyProcessingNormal, false);
|
|
}
|
|
|
|
bool EventStateManager::LookForAccessKeyAndExecute(
|
|
nsTArray<uint32_t>& aAccessCharCodes, bool aIsTrustedEvent, bool aIsRepeat,
|
|
bool aExecute) {
|
|
int32_t count, start = -1;
|
|
if (nsIContent* focusedContent = GetFocusedContent()) {
|
|
start = mAccessKeys.IndexOf(focusedContent);
|
|
if (start == -1 && focusedContent->IsInNativeAnonymousSubtree()) {
|
|
start = mAccessKeys.IndexOf(
|
|
focusedContent->GetClosestNativeAnonymousSubtreeRootParent());
|
|
}
|
|
}
|
|
RefPtr<Element> element;
|
|
nsIFrame* frame;
|
|
int32_t length = mAccessKeys.Count();
|
|
for (uint32_t i = 0; i < aAccessCharCodes.Length(); ++i) {
|
|
uint32_t ch = aAccessCharCodes[i];
|
|
nsAutoString accessKey;
|
|
AppendUCS4ToUTF16(ch, accessKey);
|
|
for (count = 1; count <= length; ++count) {
|
|
// mAccessKeys always stores Element instances.
|
|
element = mAccessKeys[(start + count) % length]->AsElement();
|
|
frame = element->GetPrimaryFrame();
|
|
if (IsAccessKeyTarget(element, frame, accessKey)) {
|
|
if (!aExecute) {
|
|
return true;
|
|
}
|
|
bool shouldActivate =
|
|
StaticPrefs::accessibility_accesskeycausesactivation();
|
|
|
|
if (aIsRepeat && nsContentUtils::IsChromeDoc(element->OwnerDoc())) {
|
|
shouldActivate = false;
|
|
}
|
|
|
|
while (shouldActivate && ++count <= length) {
|
|
nsIContent* oc = mAccessKeys[(start + count) % length];
|
|
nsIFrame* of = oc->GetPrimaryFrame();
|
|
if (IsAccessKeyTarget(oc, of, accessKey)) shouldActivate = false;
|
|
}
|
|
|
|
bool focusChanged = false;
|
|
if (shouldActivate) {
|
|
focusChanged =
|
|
element->PerformAccesskey(shouldActivate, aIsTrustedEvent);
|
|
} else if (nsFocusManager* fm = nsFocusManager::GetFocusManager()) {
|
|
fm->SetFocus(element, nsIFocusManager::FLAG_BYKEY);
|
|
focusChanged = true;
|
|
}
|
|
|
|
if (focusChanged && aIsTrustedEvent) {
|
|
// If this is a child process, inform the parent that we want the
|
|
// focus, but pass false since we don't want to change the window
|
|
// order.
|
|
nsIDocShell* docShell = mPresContext->GetDocShell();
|
|
nsCOMPtr<nsIBrowserChild> child =
|
|
docShell ? docShell->GetBrowserChild() : nullptr;
|
|
if (child) {
|
|
child->SendRequestFocus(false, CallerType::System);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// static
|
|
void EventStateManager::GetAccessKeyLabelPrefix(Element* aElement,
|
|
nsAString& aPrefix) {
|
|
aPrefix.Truncate();
|
|
nsAutoString separator, modifierText;
|
|
nsContentUtils::GetModifierSeparatorText(separator);
|
|
|
|
AccessKeyType accessKeyType =
|
|
GetAccessKeyTypeFor(aElement->OwnerDoc()->GetDocShell());
|
|
if (accessKeyType == AccessKeyType::eNone) {
|
|
return;
|
|
}
|
|
Modifiers modifiers = WidgetKeyboardEvent::AccessKeyModifiers(accessKeyType);
|
|
if (modifiers == MODIFIER_NONE) {
|
|
return;
|
|
}
|
|
|
|
if (modifiers & MODIFIER_CONTROL) {
|
|
nsContentUtils::GetControlText(modifierText);
|
|
aPrefix.Append(modifierText + separator);
|
|
}
|
|
if (modifiers & MODIFIER_META) {
|
|
nsContentUtils::GetMetaText(modifierText);
|
|
aPrefix.Append(modifierText + separator);
|
|
}
|
|
if (modifiers & MODIFIER_OS) {
|
|
nsContentUtils::GetOSText(modifierText);
|
|
aPrefix.Append(modifierText + separator);
|
|
}
|
|
if (modifiers & MODIFIER_ALT) {
|
|
nsContentUtils::GetAltText(modifierText);
|
|
aPrefix.Append(modifierText + separator);
|
|
}
|
|
if (modifiers & MODIFIER_SHIFT) {
|
|
nsContentUtils::GetShiftText(modifierText);
|
|
aPrefix.Append(modifierText + separator);
|
|
}
|
|
}
|
|
|
|
struct MOZ_STACK_CLASS AccessKeyInfo {
|
|
WidgetKeyboardEvent* event;
|
|
nsTArray<uint32_t>& charCodes;
|
|
|
|
AccessKeyInfo(WidgetKeyboardEvent* aEvent, nsTArray<uint32_t>& aCharCodes)
|
|
: event(aEvent), charCodes(aCharCodes) {}
|
|
};
|
|
|
|
bool EventStateManager::WalkESMTreeToHandleAccessKey(
|
|
WidgetKeyboardEvent* aEvent, nsPresContext* aPresContext,
|
|
nsTArray<uint32_t>& aAccessCharCodes, nsIDocShellTreeItem* aBubbledFrom,
|
|
ProcessingAccessKeyState aAccessKeyState, bool aExecute) {
|
|
EnsureDocument(mPresContext);
|
|
nsCOMPtr<nsIDocShell> docShell = aPresContext->GetDocShell();
|
|
if (NS_WARN_IF(!docShell) || NS_WARN_IF(!mDocument)) {
|
|
return false;
|
|
}
|
|
AccessKeyType accessKeyType = GetAccessKeyTypeFor(docShell);
|
|
if (accessKeyType == AccessKeyType::eNone) {
|
|
return false;
|
|
}
|
|
// Alt or other accesskey modifier is down, we may need to do an accesskey.
|
|
if (mAccessKeys.Count() > 0 &&
|
|
aEvent->ModifiersMatchWithAccessKey(accessKeyType)) {
|
|
// Someone registered an accesskey. Find and activate it.
|
|
if (LookForAccessKeyAndExecute(aAccessCharCodes, aEvent->IsTrusted(),
|
|
aEvent->mIsRepeat, aExecute)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
int32_t childCount;
|
|
docShell->GetInProcessChildCount(&childCount);
|
|
for (int32_t counter = 0; counter < childCount; counter++) {
|
|
// Not processing the child which bubbles up the handling
|
|
nsCOMPtr<nsIDocShellTreeItem> subShellItem;
|
|
docShell->GetInProcessChildAt(counter, getter_AddRefs(subShellItem));
|
|
if (aAccessKeyState == eAccessKeyProcessingUp &&
|
|
subShellItem == aBubbledFrom) {
|
|
continue;
|
|
}
|
|
|
|
nsCOMPtr<nsIDocShell> subDS = do_QueryInterface(subShellItem);
|
|
if (subDS && IsShellVisible(subDS)) {
|
|
// Guarantee subPresShell lifetime while we're handling access key
|
|
// since somebody may assume that it won't be deleted before the
|
|
// corresponding nsPresContext and EventStateManager.
|
|
RefPtr<PresShell> subPresShell = subDS->GetPresShell();
|
|
|
|
// Docshells need not have a presshell (eg. display:none
|
|
// iframes, docshells in transition between documents, etc).
|
|
if (!subPresShell) {
|
|
// Oh, well. Just move on to the next child
|
|
continue;
|
|
}
|
|
|
|
RefPtr<nsPresContext> subPresContext = subPresShell->GetPresContext();
|
|
|
|
RefPtr<EventStateManager> esm =
|
|
static_cast<EventStateManager*>(subPresContext->EventStateManager());
|
|
|
|
if (esm && esm->WalkESMTreeToHandleAccessKey(
|
|
aEvent, subPresContext, aAccessCharCodes, nullptr,
|
|
eAccessKeyProcessingDown, aExecute)) {
|
|
return true;
|
|
}
|
|
}
|
|
} // if end . checking all sub docshell ends here.
|
|
|
|
// bubble up the process to the parent docshell if necessary
|
|
if (eAccessKeyProcessingDown != aAccessKeyState) {
|
|
nsCOMPtr<nsIDocShellTreeItem> parentShellItem;
|
|
docShell->GetInProcessParent(getter_AddRefs(parentShellItem));
|
|
nsCOMPtr<nsIDocShell> parentDS = do_QueryInterface(parentShellItem);
|
|
if (parentDS) {
|
|
// Guarantee parentPresShell lifetime while we're handling access key
|
|
// since somebody may assume that it won't be deleted before the
|
|
// corresponding nsPresContext and EventStateManager.
|
|
RefPtr<PresShell> parentPresShell = parentDS->GetPresShell();
|
|
NS_ASSERTION(parentPresShell,
|
|
"Our PresShell exists but the parent's does not?");
|
|
|
|
RefPtr<nsPresContext> parentPresContext =
|
|
parentPresShell->GetPresContext();
|
|
NS_ASSERTION(parentPresContext, "PresShell without PresContext");
|
|
|
|
RefPtr<EventStateManager> esm = static_cast<EventStateManager*>(
|
|
parentPresContext->EventStateManager());
|
|
if (esm && esm->WalkESMTreeToHandleAccessKey(
|
|
aEvent, parentPresContext, aAccessCharCodes, docShell,
|
|
eAccessKeyProcessingDown, aExecute)) {
|
|
return true;
|
|
}
|
|
}
|
|
} // if end. bubble up process
|
|
|
|
// If the content access key modifier is pressed, try remote children
|
|
if (aExecute &&
|
|
aEvent->ModifiersMatchWithAccessKey(AccessKeyType::eContent) &&
|
|
mDocument && mDocument->GetWindow()) {
|
|
// If the focus is currently on a node with a BrowserParent, the key event
|
|
// should've gotten forwarded to the child process and HandleAccessKey
|
|
// called from there.
|
|
if (BrowserParent::GetFrom(GetFocusedContent())) {
|
|
// If access key may be only in remote contents, this method won't handle
|
|
// access key synchronously. In this case, only reply event should reach
|
|
// here.
|
|
MOZ_ASSERT(aEvent->IsHandledInRemoteProcess() ||
|
|
!aEvent->IsWaitingReplyFromRemoteProcess());
|
|
}
|
|
// If focus is somewhere else, then we need to check the remote children.
|
|
// However, if the event has already been handled in a remote process,
|
|
// then, focus is moved from the remote process after posting the event.
|
|
// In such case, we shouldn't retry to handle access keys in remote
|
|
// processes.
|
|
else if (!aEvent->IsHandledInRemoteProcess()) {
|
|
AccessKeyInfo accessKeyInfo(aEvent, aAccessCharCodes);
|
|
nsContentUtils::CallOnAllRemoteChildren(
|
|
mDocument->GetWindow(),
|
|
[&accessKeyInfo](BrowserParent* aBrowserParent) -> CallState {
|
|
// Only forward accesskeys for the active tab.
|
|
if (aBrowserParent->GetDocShellIsActive()) {
|
|
// Even if there is no target for the accesskey in this process,
|
|
// the event may match with a content accesskey. If so, the
|
|
// keyboard event should be handled with reply event for
|
|
// preventing double action. (e.g., Alt+Shift+F on Windows may
|
|
// focus a content in remote and open "File" menu.)
|
|
accessKeyInfo.event->StopPropagation();
|
|
accessKeyInfo.event->MarkAsWaitingReplyFromRemoteProcess();
|
|
aBrowserParent->HandleAccessKey(*accessKeyInfo.event,
|
|
accessKeyInfo.charCodes);
|
|
return CallState::Stop;
|
|
}
|
|
|
|
return CallState::Continue;
|
|
});
|
|
}
|
|
}
|
|
|
|
return false;
|
|
} // end of HandleAccessKey
|
|
|
|
static BrowserParent* GetBrowserParentAncestor(BrowserParent* aBrowserParent) {
|
|
MOZ_ASSERT(aBrowserParent);
|
|
|
|
BrowserBridgeParent* bbp = aBrowserParent->GetBrowserBridgeParent();
|
|
if (!bbp) {
|
|
return nullptr;
|
|
}
|
|
|
|
return bbp->Manager();
|
|
}
|
|
|
|
static void DispatchCrossProcessMouseExitEvents(WidgetMouseEvent* aMouseEvent,
|
|
BrowserParent* aRemoteTarget,
|
|
BrowserParent* aStopAncestor,
|
|
bool aIsReallyExit) {
|
|
MOZ_ASSERT(aMouseEvent);
|
|
MOZ_ASSERT(aRemoteTarget);
|
|
MOZ_ASSERT(aRemoteTarget != aStopAncestor);
|
|
MOZ_ASSERT_IF(aStopAncestor, nsContentUtils::GetCommonBrowserParentAncestor(
|
|
aRemoteTarget, aStopAncestor));
|
|
|
|
while (aRemoteTarget != aStopAncestor) {
|
|
UniquePtr<WidgetMouseEvent> mouseExitEvent =
|
|
CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseExitFromWidget,
|
|
aMouseEvent->mRelatedTarget);
|
|
mouseExitEvent->mExitFrom =
|
|
Some(aIsReallyExit ? WidgetMouseEvent::ePuppet
|
|
: WidgetMouseEvent::ePuppetParentToPuppetChild);
|
|
aRemoteTarget->SendRealMouseEvent(*mouseExitEvent);
|
|
|
|
aRemoteTarget = GetBrowserParentAncestor(aRemoteTarget);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::DispatchCrossProcessEvent(WidgetEvent* aEvent,
|
|
BrowserParent* aRemoteTarget,
|
|
nsEventStatus* aStatus) {
|
|
MOZ_ASSERT(aEvent);
|
|
MOZ_ASSERT(aRemoteTarget);
|
|
MOZ_ASSERT(aStatus);
|
|
|
|
BrowserParent* remote = aRemoteTarget;
|
|
|
|
WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
|
|
bool isContextMenuKey = mouseEvent && mouseEvent->IsContextMenuKeyEvent();
|
|
if (aEvent->mClass == eKeyboardEventClass || isContextMenuKey) {
|
|
// APZ attaches a LayersId to hit-testable events, for keyboard events,
|
|
// we use focus.
|
|
BrowserParent* preciseRemote = BrowserParent::GetFocused();
|
|
if (preciseRemote) {
|
|
remote = preciseRemote;
|
|
}
|
|
// else there is a race between layout and focus tracking,
|
|
// so fall back to delivering the event to the topmost child process.
|
|
} else if (aEvent->mLayersId.IsValid()) {
|
|
BrowserParent* preciseRemote =
|
|
BrowserParent::GetBrowserParentFromLayersId(aEvent->mLayersId);
|
|
if (preciseRemote) {
|
|
remote = preciseRemote;
|
|
}
|
|
// else there is a race between APZ and the LayersId to BrowserParent
|
|
// mapping, so fall back to delivering the event to the topmost child
|
|
// process.
|
|
}
|
|
|
|
switch (aEvent->mClass) {
|
|
case eMouseEventClass: {
|
|
BrowserParent* oldRemote = BrowserParent::GetLastMouseRemoteTarget();
|
|
|
|
// If this is a eMouseExitFromWidget event, need to redirect the event to
|
|
// the last remote and and notify all its ancestors about the exit, if
|
|
// any.
|
|
if (mouseEvent->mMessage == eMouseExitFromWidget) {
|
|
MOZ_ASSERT(mouseEvent->mExitFrom.value() == WidgetMouseEvent::ePuppet);
|
|
MOZ_ASSERT(mouseEvent->mReason == WidgetMouseEvent::eReal);
|
|
MOZ_ASSERT(!mouseEvent->mLayersId.IsValid());
|
|
MOZ_ASSERT(remote->GetBrowserHost());
|
|
|
|
if (oldRemote && oldRemote != remote) {
|
|
Unused << NS_WARN_IF(nsContentUtils::GetCommonBrowserParentAncestor(
|
|
remote, oldRemote) != remote);
|
|
remote = oldRemote;
|
|
}
|
|
|
|
DispatchCrossProcessMouseExitEvents(mouseEvent, remote, nullptr, true);
|
|
return;
|
|
}
|
|
|
|
// If a mouse is over a remote target A, and then moves to
|
|
// remote target B, we'd deliver the event directly to remote target B
|
|
// after the moving, A would never get notified that the mouse left.
|
|
// So we generate a exit event to notify A after the move.
|
|
// XXXedgar, if the synthesized mouse events could deliver to the correct
|
|
// process directly (see
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=1549355), we probably
|
|
// don't need to check mReason then.
|
|
if (mouseEvent->mReason == WidgetMouseEvent::eReal &&
|
|
remote != oldRemote) {
|
|
MOZ_ASSERT(mouseEvent->mMessage != eMouseExitFromWidget);
|
|
if (oldRemote) {
|
|
BrowserParent* commonAncestor =
|
|
nsContentUtils::GetCommonBrowserParentAncestor(remote, oldRemote);
|
|
if (commonAncestor == oldRemote) {
|
|
// Mouse moves to the inner OOP frame, it is not a really exit.
|
|
DispatchCrossProcessMouseExitEvents(
|
|
mouseEvent, GetBrowserParentAncestor(remote),
|
|
GetBrowserParentAncestor(commonAncestor), false);
|
|
} else if (commonAncestor == remote) {
|
|
// Mouse moves to the outer OOP frame, it is a really exit.
|
|
DispatchCrossProcessMouseExitEvents(mouseEvent, oldRemote,
|
|
commonAncestor, true);
|
|
} else {
|
|
// Mouse moves to OOP frame in other subtree, it is a really exit,
|
|
// need to notify all its ancestors before common ancestor about the
|
|
// exit.
|
|
DispatchCrossProcessMouseExitEvents(mouseEvent, oldRemote,
|
|
commonAncestor, true);
|
|
if (commonAncestor) {
|
|
UniquePtr<WidgetMouseEvent> mouseExitEvent =
|
|
CreateMouseOrPointerWidgetEvent(mouseEvent,
|
|
eMouseExitFromWidget,
|
|
mouseEvent->mRelatedTarget);
|
|
mouseExitEvent->mExitFrom =
|
|
Some(WidgetMouseEvent::ePuppetParentToPuppetChild);
|
|
commonAncestor->SendRealMouseEvent(*mouseExitEvent);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mouseEvent->mMessage != eMouseExitFromWidget &&
|
|
mouseEvent->mMessage != eMouseEnterIntoWidget) {
|
|
// This is to make cursor would be updated correctly.
|
|
remote->MouseEnterIntoWidget();
|
|
}
|
|
}
|
|
|
|
remote->SendRealMouseEvent(*mouseEvent);
|
|
return;
|
|
}
|
|
case eKeyboardEventClass: {
|
|
remote->SendRealKeyEvent(*aEvent->AsKeyboardEvent());
|
|
return;
|
|
}
|
|
case eWheelEventClass: {
|
|
remote->SendMouseWheelEvent(*aEvent->AsWheelEvent());
|
|
return;
|
|
}
|
|
case eTouchEventClass: {
|
|
// Let the child process synthesize a mouse event if needed, and
|
|
// ensure we don't synthesize one in this process.
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
remote->SendRealTouchEvent(*aEvent->AsTouchEvent());
|
|
return;
|
|
}
|
|
case eDragEventClass: {
|
|
RefPtr<BrowserParent> browserParent = remote;
|
|
browserParent->Manager()->MaybeInvokeDragSession(browserParent);
|
|
|
|
nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
|
|
uint32_t dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
|
|
uint32_t action = nsIDragService::DRAGDROP_ACTION_NONE;
|
|
nsCOMPtr<nsIPrincipal> principal;
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
|
|
if (dragSession) {
|
|
dragSession->DragEventDispatchedToChildProcess();
|
|
dragSession->GetDragAction(&action);
|
|
dragSession->GetTriggeringPrincipal(getter_AddRefs(principal));
|
|
dragSession->GetCsp(getter_AddRefs(csp));
|
|
RefPtr<DataTransfer> initialDataTransfer =
|
|
dragSession->GetDataTransfer();
|
|
if (initialDataTransfer) {
|
|
dropEffect = initialDataTransfer->DropEffectInt();
|
|
}
|
|
}
|
|
|
|
browserParent->SendRealDragEvent(*aEvent->AsDragEvent(), action,
|
|
dropEffect, principal, csp);
|
|
return;
|
|
}
|
|
case ePluginEventClass: {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
remote->SendPluginEvent(*aEvent->AsPluginEvent());
|
|
return;
|
|
}
|
|
default: {
|
|
MOZ_CRASH("Attempt to send non-whitelisted event?");
|
|
}
|
|
}
|
|
}
|
|
|
|
bool EventStateManager::IsRemoteTarget(nsIContent* target) {
|
|
return BrowserParent::GetFrom(target) || BrowserBridgeChild::GetFrom(target);
|
|
}
|
|
|
|
bool EventStateManager::IsTopLevelRemoteTarget(nsIContent* target) {
|
|
return !!BrowserParent::GetFrom(target);
|
|
}
|
|
|
|
bool EventStateManager::HandleCrossProcessEvent(WidgetEvent* aEvent,
|
|
nsEventStatus* aStatus) {
|
|
if (!aEvent->CanBeSentToRemoteProcess()) {
|
|
return false;
|
|
}
|
|
|
|
MOZ_ASSERT(!aEvent->HasBeenPostedToRemoteProcess(),
|
|
"Why do we need to post same event to remote processes again?");
|
|
|
|
// Collect the remote event targets we're going to forward this
|
|
// event to.
|
|
//
|
|
// NB: the elements of |remoteTargets| must be unique, for correctness.
|
|
AutoTArray<RefPtr<BrowserParent>, 1> remoteTargets;
|
|
if (aEvent->mClass != eTouchEventClass || aEvent->mMessage == eTouchStart) {
|
|
// If this event only has one target, and it's remote, add it to
|
|
// the array.
|
|
nsIFrame* frame = aEvent->mMessage == eDragExit
|
|
? sLastDragOverFrame.GetFrame()
|
|
: GetEventTarget();
|
|
nsIContent* target = frame ? frame->GetContent() : nullptr;
|
|
if (BrowserParent* remoteTarget = BrowserParent::GetFrom(target)) {
|
|
remoteTargets.AppendElement(remoteTarget);
|
|
}
|
|
} else {
|
|
// This is a touch event with possibly multiple touch points.
|
|
// Each touch point may have its own target. So iterate through
|
|
// all of them and collect the unique set of targets for event
|
|
// forwarding.
|
|
//
|
|
// This loop is similar to the one used in
|
|
// PresShell::DispatchTouchEvent().
|
|
const WidgetTouchEvent::TouchArray& touches =
|
|
aEvent->AsTouchEvent()->mTouches;
|
|
for (uint32_t i = 0; i < touches.Length(); ++i) {
|
|
Touch* touch = touches[i];
|
|
// NB: the |mChanged| check is an optimization, subprocesses can
|
|
// compute this for themselves. If the touch hasn't changed, we
|
|
// may be able to avoid forwarding the event entirely (which is
|
|
// not free).
|
|
if (!touch || !touch->mChanged) {
|
|
continue;
|
|
}
|
|
nsCOMPtr<EventTarget> targetPtr = touch->mTarget;
|
|
if (!targetPtr) {
|
|
continue;
|
|
}
|
|
nsCOMPtr<nsIContent> target = do_QueryInterface(targetPtr);
|
|
BrowserParent* remoteTarget = BrowserParent::GetFrom(target);
|
|
if (remoteTarget && !remoteTargets.Contains(remoteTarget)) {
|
|
remoteTargets.AppendElement(remoteTarget);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (remoteTargets.Length() == 0) {
|
|
return false;
|
|
}
|
|
|
|
// Dispatch the event to the remote target.
|
|
for (uint32_t i = 0; i < remoteTargets.Length(); ++i) {
|
|
DispatchCrossProcessEvent(aEvent, remoteTargets[i], aStatus);
|
|
}
|
|
return aEvent->HasBeenPostedToRemoteProcess();
|
|
}
|
|
|
|
//
|
|
// 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 EventStateManager::CreateClickHoldTimer(nsPresContext* inPresContext,
|
|
nsIFrame* inDownFrame,
|
|
WidgetGUIEvent* inMouseDownEvent) {
|
|
if (!inMouseDownEvent->IsTrusted() ||
|
|
IsTopLevelRemoteTarget(mGestureDownContent) || sIsPointerLocked) {
|
|
return;
|
|
}
|
|
|
|
// just to be anal (er, safe)
|
|
if (mClickHoldTimer) {
|
|
mClickHoldTimer->Cancel();
|
|
mClickHoldTimer = nullptr;
|
|
}
|
|
|
|
// 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 &&
|
|
nsContentUtils::HasNonEmptyAttr(mGestureDownContent, kNameSpaceID_None,
|
|
nsGkAtoms::popup)) {
|
|
return;
|
|
}
|
|
|
|
int32_t clickHoldDelay = StaticPrefs::ui_click_hold_context_menus_delay();
|
|
NS_NewTimerWithFuncCallback(
|
|
getter_AddRefs(mClickHoldTimer), sClickHoldCallback, this, clickHoldDelay,
|
|
nsITimer::TYPE_ONE_SHOT, "EventStateManager::CreateClickHoldTimer");
|
|
} // CreateClickHoldTimer
|
|
|
|
//
|
|
// KillClickHoldTimer
|
|
//
|
|
// Stop the timer that would show the context menu dead in its tracks
|
|
//
|
|
void EventStateManager::KillClickHoldTimer() {
|
|
if (mClickHoldTimer) {
|
|
mClickHoldTimer->Cancel();
|
|
mClickHoldTimer = nullptr;
|
|
}
|
|
}
|
|
|
|
//
|
|
// sClickHoldCallback
|
|
//
|
|
// This fires after the mouse has been down for a certain length of time.
|
|
//
|
|
void EventStateManager::sClickHoldCallback(nsITimer* aTimer, void* aESM) {
|
|
RefPtr<EventStateManager> self = static_cast<EventStateManager*>(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 EventStateManager::FireContextClick() {
|
|
if (!mGestureDownContent || !mPresContext || sIsPointerLocked) {
|
|
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);
|
|
// make sure the widget sticks around
|
|
nsCOMPtr<nsIWidget> targetWidget;
|
|
if (mCurrentTarget && (targetWidget = mCurrentTarget->GetNearestWidget())) {
|
|
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
|
|
bool allowedToDispatch = true;
|
|
|
|
if (mGestureDownContent->IsAnyOfXULElements(nsGkAtoms::scrollbar,
|
|
nsGkAtoms::scrollbarbutton,
|
|
nsGkAtoms::button)) {
|
|
allowedToDispatch = false;
|
|
} else if (mGestureDownContent->IsXULElement(nsGkAtoms::toolbarbutton)) {
|
|
// a <toolbarbutton> that has the container attribute set
|
|
// will already have its own dropdown.
|
|
if (nsContentUtils::HasNonEmptyAttr(
|
|
mGestureDownContent, kNameSpaceID_None, nsGkAtoms::container)) {
|
|
allowedToDispatch = false;
|
|
} else {
|
|
// If the toolbar button has an open menu, don't attempt to open
|
|
// a second menu
|
|
if (mGestureDownContent->IsElement() &&
|
|
mGestureDownContent->AsElement()->AttrValueIs(
|
|
kNameSpaceID_None, nsGkAtoms::open, nsGkAtoms::_true,
|
|
eCaseMatters)) {
|
|
allowedToDispatch = false;
|
|
}
|
|
}
|
|
} else if (mGestureDownContent->IsHTMLElement()) {
|
|
nsCOMPtr<nsIFormControl> formCtrl(do_QueryInterface(mGestureDownContent));
|
|
|
|
if (formCtrl) {
|
|
allowedToDispatch =
|
|
formCtrl->IsTextControl(/*aExcludePassword*/ false) ||
|
|
formCtrl->ControlType() == NS_FORM_INPUT_FILE;
|
|
} else if (mGestureDownContent->IsAnyOfHTMLElements(
|
|
nsGkAtoms::embed, nsGkAtoms::object, nsGkAtoms::label)) {
|
|
allowedToDispatch = false;
|
|
}
|
|
}
|
|
|
|
if (allowedToDispatch) {
|
|
// init the event while mCurrentTarget is still good
|
|
WidgetMouseEvent event(true, eContextMenu, targetWidget,
|
|
WidgetMouseEvent::eReal);
|
|
event.mClickCount = 1;
|
|
FillInEventFromGestureDown(&event);
|
|
|
|
// stop selection tracking, we're in control now
|
|
if (mCurrentTarget) {
|
|
RefPtr<nsFrameSelection> frameSel = mCurrentTarget->GetFrameSelection();
|
|
|
|
if (frameSel && frameSel->GetDragState()) {
|
|
// note that this can cause selection changed events to fire if we're
|
|
// in a text field, which will null out mCurrentTarget
|
|
frameSel->SetDragState(false);
|
|
}
|
|
}
|
|
|
|
AutoHandlingUserInputStatePusher userInpStatePusher(true, &event);
|
|
|
|
// dispatch to DOM
|
|
EventDispatcher::Dispatch(mGestureDownContent, mPresContext, &event,
|
|
nullptr, &status);
|
|
|
|
// We don't need to dispatch to frame handling because no frames
|
|
// watch eContextMenu 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(true);
|
|
}
|
|
|
|
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 EventStateManager::BeginTrackingDragGesture(nsPresContext* aPresContext,
|
|
WidgetMouseEvent* inDownEvent,
|
|
nsIFrame* inDownFrame) {
|
|
if (!inDownEvent->mWidget) {
|
|
return;
|
|
}
|
|
|
|
// Note that |inDownEvent| could be either a mouse down event or a
|
|
// synthesized mouse move event.
|
|
SetGestureDownPoint(inDownEvent);
|
|
|
|
if (inDownFrame) {
|
|
inDownFrame->GetContentForEvent(inDownEvent,
|
|
getter_AddRefs(mGestureDownContent));
|
|
|
|
mGestureDownFrameOwner = inDownFrame->GetContent();
|
|
if (!mGestureDownFrameOwner) {
|
|
mGestureDownFrameOwner = mGestureDownContent;
|
|
}
|
|
}
|
|
mGestureModifiers = inDownEvent->mModifiers;
|
|
mGestureDownButtons = inDownEvent->mButtons;
|
|
|
|
if (inDownEvent->mMessage != eMouseTouchDrag &&
|
|
StaticPrefs::ui_click_hold_context_menus()) {
|
|
// fire off a timer to track click-hold
|
|
CreateClickHoldTimer(aPresContext, inDownFrame, inDownEvent);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::SetGestureDownPoint(WidgetGUIEvent* aEvent) {
|
|
mGestureDownPoint =
|
|
GetEventRefPoint(aEvent) + aEvent->mWidget->WidgetToScreenOffset();
|
|
}
|
|
|
|
LayoutDeviceIntPoint EventStateManager::GetEventRefPoint(
|
|
WidgetEvent* aEvent) const {
|
|
auto touchEvent = aEvent->AsTouchEvent();
|
|
return (touchEvent && !touchEvent->mTouches.IsEmpty())
|
|
? aEvent->AsTouchEvent()->mTouches[0]->mRefPoint
|
|
: aEvent->mRefPoint;
|
|
}
|
|
|
|
void EventStateManager::BeginTrackingRemoteDragGesture(
|
|
nsIContent* aContent, RemoteDragStartData* aDragStartData) {
|
|
mGestureDownContent = aContent;
|
|
mGestureDownFrameOwner = aContent;
|
|
mGestureDownDragStartData = aDragStartData;
|
|
}
|
|
|
|
//
|
|
// 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 EventStateManager::StopTrackingDragGesture(bool aClearInChildProcesses) {
|
|
mGestureDownContent = nullptr;
|
|
mGestureDownFrameOwner = nullptr;
|
|
mGestureDownDragStartData = nullptr;
|
|
|
|
// If a content process starts a drag but the mouse is released before the
|
|
// parent starts the actual drag, the content process will think a drag is
|
|
// still happening. Inform any child processes with active drags that the drag
|
|
// should be stopped.
|
|
if (aClearInChildProcesses) {
|
|
nsCOMPtr<nsIDragService> dragService =
|
|
do_GetService("@mozilla.org/widget/dragservice;1");
|
|
if (dragService) {
|
|
nsCOMPtr<nsIDragSession> dragSession;
|
|
dragService->GetCurrentSession(getter_AddRefs(dragSession));
|
|
if (!dragSession) {
|
|
// Only notify if there isn't a drag session active.
|
|
dragService->RemoveAllChildProcesses();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void EventStateManager::FillInEventFromGestureDown(WidgetMouseEvent* aEvent) {
|
|
NS_ASSERTION(aEvent->mWidget == 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
|
|
aEvent->mRefPoint =
|
|
mGestureDownPoint - aEvent->mWidget->WidgetToScreenOffset();
|
|
aEvent->mModifiers = mGestureModifiers;
|
|
aEvent->mButtons = mGestureDownButtons;
|
|
}
|
|
|
|
void EventStateManager::MaybeFirePointerCancel(WidgetInputEvent* aEvent) {
|
|
RefPtr<PresShell> presShell = mPresContext->GetPresShell();
|
|
AutoWeakFrame targetFrame = mCurrentTarget;
|
|
|
|
if (!StaticPrefs::dom_w3c_pointer_events_enabled() || !presShell ||
|
|
!targetFrame) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> content;
|
|
targetFrame->GetContentForEvent(aEvent, getter_AddRefs(content));
|
|
if (!content) {
|
|
return;
|
|
}
|
|
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
|
|
if (WidgetMouseEvent* aMouseEvent = aEvent->AsMouseEvent()) {
|
|
WidgetPointerEvent event(*aMouseEvent);
|
|
PointerEventHandler::InitPointerEventFromMouse(&event, aMouseEvent,
|
|
ePointerCancel);
|
|
|
|
event.convertToPointer = false;
|
|
presShell->HandleEventWithTarget(&event, targetFrame, content, &status);
|
|
} else if (WidgetTouchEvent* aTouchEvent = aEvent->AsTouchEvent()) {
|
|
WidgetPointerEvent event(aTouchEvent->IsTrusted(), ePointerCancel,
|
|
aTouchEvent->mWidget);
|
|
|
|
PointerEventHandler::InitPointerEventFromTouch(
|
|
&event, aTouchEvent, aTouchEvent->mTouches[0], true);
|
|
|
|
event.convertToPointer = false;
|
|
presShell->HandleEventWithTarget(&event, targetFrame, content, &status);
|
|
} else {
|
|
MOZ_ASSERT(false);
|
|
}
|
|
|
|
// HandleEventWithTarget clears out mCurrentTarget, which may be used in the
|
|
// caller GenerateDragGesture. We have to restore mCurrentTarget.
|
|
mCurrentTarget = targetFrame;
|
|
}
|
|
|
|
bool EventStateManager::IsEventOutsideDragThreshold(
|
|
WidgetInputEvent* aEvent) const {
|
|
static int32_t sPixelThresholdX = 0;
|
|
static int32_t sPixelThresholdY = 0;
|
|
|
|
if (!sPixelThresholdX) {
|
|
sPixelThresholdX =
|
|
LookAndFeel::GetInt(LookAndFeel::IntID::DragThresholdX, 0);
|
|
sPixelThresholdY =
|
|
LookAndFeel::GetInt(LookAndFeel::IntID::DragThresholdY, 0);
|
|
if (!sPixelThresholdX) sPixelThresholdX = 5;
|
|
if (!sPixelThresholdY) sPixelThresholdY = 5;
|
|
}
|
|
|
|
LayoutDeviceIntPoint pt =
|
|
aEvent->mWidget->WidgetToScreenOffset() + GetEventRefPoint(aEvent);
|
|
LayoutDeviceIntPoint distance = pt - mGestureDownPoint;
|
|
return Abs(distance.x) > AssertedCast<uint32_t>(sPixelThresholdX) ||
|
|
Abs(distance.y) > AssertedCast<uint32_t>(sPixelThresholdY);
|
|
}
|
|
|
|
//
|
|
// 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 EventStateManager::GenerateDragGesture(nsPresContext* aPresContext,
|
|
WidgetInputEvent* aEvent) {
|
|
NS_ASSERTION(aPresContext, "This shouldn't happen.");
|
|
if (!IsTrackingDragGesture()) {
|
|
return;
|
|
}
|
|
|
|
AutoWeakFrame targetFrameBefore = mCurrentTarget;
|
|
auto autoRestore = MakeScopeExit([&] { mCurrentTarget = targetFrameBefore; });
|
|
mCurrentTarget = mGestureDownFrameOwner->GetPrimaryFrame();
|
|
|
|
if (!mCurrentTarget || !mCurrentTarget->GetNearestWidget()) {
|
|
StopTrackingDragGesture(true);
|
|
return;
|
|
}
|
|
|
|
// Check if selection is tracking drag gestures, if so
|
|
// don't interfere!
|
|
if (mCurrentTarget) {
|
|
RefPtr<nsFrameSelection> frameSel = mCurrentTarget->GetFrameSelection();
|
|
if (frameSel && frameSel->GetDragState()) {
|
|
StopTrackingDragGesture(true);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// If non-native code is capturing the mouse don't start a drag.
|
|
if (PresShell::IsMouseCapturePreventingDrag()) {
|
|
StopTrackingDragGesture(true);
|
|
return;
|
|
}
|
|
|
|
if (!IsEventOutsideDragThreshold(aEvent)) {
|
|
// To keep the old behavior, flush layout even if we don't start dnd.
|
|
FlushLayout(aPresContext);
|
|
return;
|
|
}
|
|
|
|
if (StaticPrefs::ui_click_hold_context_menus()) {
|
|
// stop the click-hold before we fire off the drag gesture, in case
|
|
// it takes a long time
|
|
KillClickHoldTimer();
|
|
}
|
|
|
|
nsCOMPtr<nsIDocShell> docshell = aPresContext->GetDocShell();
|
|
if (!docshell) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsPIDOMWindowOuter> window = docshell->GetWindow();
|
|
if (!window) return;
|
|
|
|
RefPtr<DataTransfer> dataTransfer =
|
|
new DataTransfer(window, eDragStart, false, -1);
|
|
auto protectDataTransfer = MakeScopeExit([&] {
|
|
if (dataTransfer) {
|
|
dataTransfer->Disconnect();
|
|
}
|
|
});
|
|
|
|
RefPtr<Selection> selection;
|
|
RefPtr<RemoteDragStartData> remoteDragStartData;
|
|
nsCOMPtr<nsIContent> eventContent, targetContent;
|
|
nsCOMPtr<nsIPrincipal> principal;
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
bool allowEmptyDataTransfer = false;
|
|
mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(eventContent));
|
|
if (eventContent) {
|
|
// If the content is a text node in a password field, we shouldn't
|
|
// allow to drag its raw text. Note that we've supported drag from
|
|
// password fields but dragging data was masked text. So, it doesn't
|
|
// make sense anyway.
|
|
if (eventContent->IsText() && eventContent->HasFlag(NS_MAYBE_MASKED)) {
|
|
// However, it makes sense to allow to drag selected password text
|
|
// when copying selected password is allowed because users may want
|
|
// to use drag and drop rather than copy and paste when web apps
|
|
// request to input password twice for conforming new password but
|
|
// they used password generator.
|
|
TextEditor* textEditor =
|
|
nsContentUtils::GetTextEditorFromAnonymousNodeWithoutCreation(
|
|
eventContent);
|
|
if (!textEditor || !textEditor->IsCopyToClipboardAllowed()) {
|
|
StopTrackingDragGesture(true);
|
|
return;
|
|
}
|
|
}
|
|
DetermineDragTargetAndDefaultData(
|
|
window, eventContent, dataTransfer, &allowEmptyDataTransfer,
|
|
getter_AddRefs(selection), getter_AddRefs(remoteDragStartData),
|
|
getter_AddRefs(targetContent), getter_AddRefs(principal),
|
|
getter_AddRefs(csp));
|
|
}
|
|
|
|
// Stop tracking the drag gesture now. This should stop us from
|
|
// reentering GenerateDragGesture inside DOM event processing.
|
|
// Pass false to avoid clearing the child process state since a real
|
|
// drag should be starting.
|
|
StopTrackingDragGesture(false);
|
|
|
|
if (!targetContent) return;
|
|
|
|
// Use our targetContent, now that we've determined it, as the
|
|
// parent object of the DataTransfer.
|
|
nsCOMPtr<nsIContent> parentContent =
|
|
targetContent->FindFirstNonChromeOnlyAccessContent();
|
|
dataTransfer->SetParentObject(parentContent);
|
|
|
|
sLastDragOverFrame = nullptr;
|
|
nsCOMPtr<nsIWidget> widget = mCurrentTarget->GetNearestWidget();
|
|
|
|
// get the widget from the target frame
|
|
WidgetDragEvent startEvent(aEvent->IsTrusted(), eDragStart, widget);
|
|
startEvent.mFlags.mIsSynthesizedForTests =
|
|
aEvent->mFlags.mIsSynthesizedForTests;
|
|
FillInEventFromGestureDown(&startEvent);
|
|
|
|
startEvent.mDataTransfer = dataTransfer;
|
|
if (aEvent->AsMouseEvent()) {
|
|
startEvent.mInputSource = aEvent->AsMouseEvent()->mInputSource;
|
|
} else if (aEvent->AsTouchEvent()) {
|
|
startEvent.mInputSource = MouseEvent_Binding::MOZ_SOURCE_TOUCH;
|
|
} else {
|
|
MOZ_ASSERT(false);
|
|
}
|
|
|
|
// 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.
|
|
|
|
// Hold onto old target content through the event and reset after.
|
|
nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
|
|
|
|
// Set the current target to the content for the mouse down
|
|
mCurrentTargetContent = targetContent;
|
|
|
|
// Dispatch the dragstart event to the DOM.
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
EventDispatcher::Dispatch(targetContent, aPresContext, &startEvent, nullptr,
|
|
&status);
|
|
|
|
WidgetDragEvent* event = &startEvent;
|
|
|
|
nsCOMPtr<nsIObserverService> observerService =
|
|
mozilla::services::GetObserverService();
|
|
// Emit observer event to allow addons to modify the DataTransfer
|
|
// object.
|
|
if (observerService) {
|
|
observerService->NotifyObservers(dataTransfer, "on-datatransfer-available",
|
|
nullptr);
|
|
}
|
|
|
|
if (status != nsEventStatus_eConsumeNoDefault) {
|
|
bool dragStarted = DoDefaultDragStart(
|
|
aPresContext, event, dataTransfer, allowEmptyDataTransfer,
|
|
targetContent, selection, remoteDragStartData, principal, csp);
|
|
if (dragStarted) {
|
|
sActiveESM = nullptr;
|
|
MaybeFirePointerCancel(aEvent);
|
|
aEvent->StopPropagation();
|
|
}
|
|
}
|
|
|
|
// Reset mCurretTargetContent to what it was
|
|
mCurrentTargetContent = targetBeforeEvent;
|
|
|
|
// Now flush all pending notifications, for better responsiveness
|
|
// while dragging.
|
|
FlushLayout(aPresContext);
|
|
} // GenerateDragGesture
|
|
|
|
void EventStateManager::DetermineDragTargetAndDefaultData(
|
|
nsPIDOMWindowOuter* aWindow, nsIContent* aSelectionTarget,
|
|
DataTransfer* aDataTransfer, bool* aAllowEmptyDataTransfer,
|
|
Selection** aSelection, RemoteDragStartData** aRemoteDragStartData,
|
|
nsIContent** aTargetNode, nsIPrincipal** aPrincipal,
|
|
nsIContentSecurityPolicy** aCsp) {
|
|
*aTargetNode = nullptr;
|
|
*aAllowEmptyDataTransfer = false;
|
|
nsCOMPtr<nsIContent> dragDataNode;
|
|
|
|
nsIContent* editingElement = aSelectionTarget->IsEditable()
|
|
? aSelectionTarget->GetEditingHost()
|
|
: nullptr;
|
|
|
|
// In chrome, only allow dragging inside editable areas.
|
|
bool isChromeContext = !aWindow->GetBrowsingContext()->IsContent();
|
|
if (isChromeContext && !editingElement) {
|
|
if (mGestureDownDragStartData) {
|
|
// A child process started a drag so use any data it assigned for the dnd
|
|
// session.
|
|
mGestureDownDragStartData->AddInitialDnDDataTo(aDataTransfer, aPrincipal,
|
|
aCsp);
|
|
mGestureDownDragStartData.forget(aRemoteDragStartData);
|
|
*aAllowEmptyDataTransfer = true;
|
|
}
|
|
} else {
|
|
mGestureDownDragStartData = nullptr;
|
|
|
|
// 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.
|
|
// mGestureDownContent is the node where the mousedown event for the drag
|
|
// occurred, and aSelectionTarget is the node to use when a selection is
|
|
// used
|
|
bool canDrag;
|
|
bool wasAlt = (mGestureModifiers & MODIFIER_ALT) != 0;
|
|
nsresult rv = nsContentAreaDragDrop::GetDragData(
|
|
aWindow, mGestureDownContent, aSelectionTarget, wasAlt, aDataTransfer,
|
|
&canDrag, aSelection, getter_AddRefs(dragDataNode), aPrincipal, aCsp);
|
|
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 (*aSelection)
|
|
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 (!*aSelection) {
|
|
while (dragContent) {
|
|
if (auto htmlElement = nsGenericHTMLElement::FromNode(dragContent)) {
|
|
if (htmlElement->Draggable()) {
|
|
// We let draggable elements to trigger dnd even if there is no data
|
|
// in the DataTransfer.
|
|
*aAllowEmptyDataTransfer = true;
|
|
break;
|
|
}
|
|
} else {
|
|
if (dragContent->IsXULElement()) {
|
|
// 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->GetFlattenedTreeParent();
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
bool EventStateManager::DoDefaultDragStart(
|
|
nsPresContext* aPresContext, WidgetDragEvent* aDragEvent,
|
|
DataTransfer* aDataTransfer, bool aAllowEmptyDataTransfer,
|
|
nsIContent* aDragTarget, Selection* aSelection,
|
|
RemoteDragStartData* aDragStartData, nsIPrincipal* aPrincipal,
|
|
nsIContentSecurityPolicy* aCsp) {
|
|
nsCOMPtr<nsIDragService> dragService =
|
|
do_GetService("@mozilla.org/widget/dragservice;1");
|
|
if (!dragService) return false;
|
|
|
|
// Default handling for the 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. However, if we're handling drag session for synthesized events,
|
|
// we need to initialize some information of the session. Therefore, we
|
|
// need to keep going for synthesized case.
|
|
nsCOMPtr<nsIDragSession> dragSession;
|
|
dragService->GetCurrentSession(getter_AddRefs(dragSession));
|
|
if (dragSession && !dragSession->IsSynthesizedForTests()) {
|
|
return 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.
|
|
uint32_t count = 0;
|
|
if (aDataTransfer) {
|
|
count = aDataTransfer->MozItemCount();
|
|
}
|
|
if (!aAllowEmptyDataTransfer && !count) {
|
|
return 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<nsIContent> dragTarget = aDataTransfer->GetDragTarget();
|
|
if (!dragTarget) {
|
|
dragTarget = aDragTarget;
|
|
if (!dragTarget) {
|
|
return 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.
|
|
uint32_t action = aDataTransfer->EffectAllowedInt();
|
|
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
|
|
int32_t imageX, imageY;
|
|
RefPtr<Element> dragImage = aDataTransfer->GetDragImage(&imageX, &imageY);
|
|
|
|
nsCOMPtr<nsIArray> transArray = aDataTransfer->GetTransferables(dragTarget);
|
|
if (!transArray) {
|
|
return false;
|
|
}
|
|
|
|
RefPtr<DataTransfer> dataTransfer;
|
|
if (!dragSession) {
|
|
// After this function returns, the DataTransfer will be cleared so it
|
|
// appears empty to content. We need to pass a DataTransfer into the Drag
|
|
// Session, so we need to make a copy.
|
|
aDataTransfer->Clone(aDragTarget, eDrop, aDataTransfer->MozUserCancelled(),
|
|
false, getter_AddRefs(dataTransfer));
|
|
|
|
// Copy over the drop effect, as Clone doesn't copy it for us.
|
|
dataTransfer->SetDropEffectInt(aDataTransfer->DropEffectInt());
|
|
} else {
|
|
MOZ_ASSERT(dragSession->IsSynthesizedForTests());
|
|
MOZ_ASSERT(aDragEvent->mFlags.mIsSynthesizedForTests);
|
|
// If we're initializing synthesized drag session, we should use given
|
|
// DataTransfer as is because it'll be used with following drag events
|
|
// in any tests, therefore it should be set to nsIDragSession.dataTransfer
|
|
// because it and DragEvent.dataTransfer should be same instance.
|
|
dataTransfer = aDataTransfer;
|
|
}
|
|
|
|
// XXXndeakin don't really want to create a new drag DOM event
|
|
// here, but we need something to pass to the InvokeDragSession
|
|
// methods.
|
|
RefPtr<DragEvent> event =
|
|
NS_NewDOMDragEvent(dragTarget, aPresContext, aDragEvent);
|
|
|
|
// Use InvokeDragSessionWithSelection if a selection is being dragged,
|
|
// such that the image can be generated from the selected text. However,
|
|
// use InvokeDragSessionWithImage if a custom image was set or something
|
|
// other than a selection is being dragged.
|
|
if (!dragImage && aSelection) {
|
|
dragService->InvokeDragSessionWithSelection(
|
|
aSelection, aPrincipal, aCsp, transArray, action, event, dataTransfer);
|
|
} else if (aDragStartData) {
|
|
MOZ_ASSERT(XRE_IsParentProcess());
|
|
dragService->InvokeDragSessionWithRemoteImage(
|
|
dragTarget, aPrincipal, aCsp, transArray, action, aDragStartData, event,
|
|
dataTransfer);
|
|
} else {
|
|
dragService->InvokeDragSessionWithImage(
|
|
dragTarget, aPrincipal, aCsp, transArray, action, dragImage, imageX,
|
|
imageY, event, dataTransfer);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void EventStateManager::ChangeZoom(bool aIncrease) {
|
|
// Send the zoom change to the top level browser so it will be handled by the
|
|
// front end in the same way as other zoom actions.
|
|
nsIDocShell* docShell = mDocument->GetDocShell();
|
|
if (!docShell) {
|
|
return;
|
|
}
|
|
|
|
BrowsingContext* bc = docShell->GetBrowsingContext();
|
|
if (!bc) {
|
|
return;
|
|
}
|
|
|
|
if (XRE_IsParentProcess()) {
|
|
bc->Canonical()->DispatchWheelZoomChange(aIncrease);
|
|
} else if (BrowserChild* child = BrowserChild::GetFrom(docShell)) {
|
|
child->SendWheelZoomChange(aIncrease);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::DoScrollHistory(int32_t direction) {
|
|
nsCOMPtr<nsISupports> pcContainer(mPresContext->GetContainerWeak());
|
|
if (pcContainer) {
|
|
nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(pcContainer));
|
|
if (webNav) {
|
|
// positive direction to go back one step, nonpositive to go forward
|
|
// This is doing user-initiated history traversal, hence we want
|
|
// to require that history entries we navigate to have user interaction.
|
|
if (direction > 0)
|
|
webNav->GoBack(/* aRequireUserInteraction = */ true);
|
|
else
|
|
webNav->GoForward(/* aRequireUserInteraction = */ true);
|
|
}
|
|
}
|
|
}
|
|
|
|
void EventStateManager::DoScrollZoom(nsIFrame* aTargetFrame,
|
|
int32_t adjustment) {
|
|
// Exclude content in chrome docshells.
|
|
nsIContent* content = aTargetFrame->GetContent();
|
|
if (content && !nsContentUtils::IsInChromeDocshell(content->OwnerDoc())) {
|
|
// Positive adjustment to decrease zoom, negative to increase
|
|
const bool increase = adjustment <= 0;
|
|
EnsureDocument(mPresContext);
|
|
ChangeZoom(increase);
|
|
}
|
|
}
|
|
|
|
static nsIFrame* GetParentFrameToScroll(nsIFrame* aFrame) {
|
|
if (!aFrame) return nullptr;
|
|
|
|
if (aFrame->StyleDisplay()->mPosition == StylePositionProperty::Fixed &&
|
|
nsLayoutUtils::IsReallyFixedPos(aFrame))
|
|
return aFrame->PresContext()->GetPresShell()->GetRootScrollFrame();
|
|
|
|
return aFrame->GetParent();
|
|
}
|
|
|
|
void EventStateManager::DispatchLegacyMouseScrollEvents(
|
|
nsIFrame* aTargetFrame, WidgetWheelEvent* aEvent, nsEventStatus* aStatus) {
|
|
MOZ_ASSERT(aEvent);
|
|
MOZ_ASSERT(aStatus);
|
|
|
|
if (!aTargetFrame || *aStatus == nsEventStatus_eConsumeNoDefault) {
|
|
return;
|
|
}
|
|
|
|
// Ignore mouse wheel transaction for computing legacy mouse wheel
|
|
// events' delta value.
|
|
nsIFrame* scrollFrame = ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
aTargetFrame, aEvent, COMPUTE_LEGACY_MOUSE_SCROLL_EVENT_TARGET);
|
|
|
|
nsIScrollableFrame* scrollTarget = do_QueryFrame(scrollFrame);
|
|
nsPresContext* pc =
|
|
scrollFrame ? scrollFrame->PresContext() : aTargetFrame->PresContext();
|
|
|
|
// DOM event's delta vales are computed from CSS pixels.
|
|
nsSize scrollAmount = GetScrollAmount(pc, aEvent, scrollTarget);
|
|
nsIntSize scrollAmountInCSSPixels(
|
|
nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.width),
|
|
nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.height));
|
|
|
|
// XXX We don't deal with fractional amount in legacy event, though the
|
|
// default action handler (DoScrollText()) deals with it.
|
|
// If we implemented such strict computation, we would need additional
|
|
// accumulated delta values. It would made the code more complicated.
|
|
// And also it would computes different delta values from older version.
|
|
// It doesn't make sense to implement such code for legacy events and
|
|
// rare cases.
|
|
int32_t scrollDeltaX, scrollDeltaY, pixelDeltaX, pixelDeltaY;
|
|
switch (aEvent->mDeltaMode) {
|
|
case WheelEvent_Binding::DOM_DELTA_PAGE:
|
|
scrollDeltaX = !aEvent->mLineOrPageDeltaX
|
|
? 0
|
|
: (aEvent->mLineOrPageDeltaX > 0
|
|
? UIEvent_Binding::SCROLL_PAGE_DOWN
|
|
: UIEvent_Binding::SCROLL_PAGE_UP);
|
|
scrollDeltaY = !aEvent->mLineOrPageDeltaY
|
|
? 0
|
|
: (aEvent->mLineOrPageDeltaY > 0
|
|
? UIEvent_Binding::SCROLL_PAGE_DOWN
|
|
: UIEvent_Binding::SCROLL_PAGE_UP);
|
|
pixelDeltaX = RoundDown(aEvent->mDeltaX * scrollAmountInCSSPixels.width);
|
|
pixelDeltaY = RoundDown(aEvent->mDeltaY * scrollAmountInCSSPixels.height);
|
|
break;
|
|
|
|
case WheelEvent_Binding::DOM_DELTA_LINE:
|
|
scrollDeltaX = aEvent->mLineOrPageDeltaX;
|
|
scrollDeltaY = aEvent->mLineOrPageDeltaY;
|
|
pixelDeltaX = RoundDown(aEvent->mDeltaX * scrollAmountInCSSPixels.width);
|
|
pixelDeltaY = RoundDown(aEvent->mDeltaY * scrollAmountInCSSPixels.height);
|
|
break;
|
|
|
|
case WheelEvent_Binding::DOM_DELTA_PIXEL:
|
|
scrollDeltaX = aEvent->mLineOrPageDeltaX;
|
|
scrollDeltaY = aEvent->mLineOrPageDeltaY;
|
|
pixelDeltaX = RoundDown(aEvent->mDeltaX);
|
|
pixelDeltaY = RoundDown(aEvent->mDeltaY);
|
|
break;
|
|
|
|
default:
|
|
MOZ_CRASH("Invalid deltaMode value comes");
|
|
}
|
|
|
|
// Send the legacy events in following order:
|
|
// 1. Vertical scroll
|
|
// 2. Vertical pixel scroll (even if #1 isn't consumed)
|
|
// 3. Horizontal scroll (even if #1 and/or #2 are consumed)
|
|
// 4. Horizontal pixel scroll (even if #3 isn't consumed)
|
|
|
|
AutoWeakFrame targetFrame(aTargetFrame);
|
|
|
|
MOZ_ASSERT(*aStatus != nsEventStatus_eConsumeNoDefault &&
|
|
!aEvent->DefaultPrevented(),
|
|
"If you make legacy events dispatched for default prevented wheel "
|
|
"event, you need to initialize stateX and stateY");
|
|
EventState stateX, stateY;
|
|
if (scrollDeltaY) {
|
|
SendLineScrollEvent(aTargetFrame, aEvent, stateY, scrollDeltaY,
|
|
DELTA_DIRECTION_Y);
|
|
if (!targetFrame.IsAlive()) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pixelDeltaY) {
|
|
SendPixelScrollEvent(aTargetFrame, aEvent, stateY, pixelDeltaY,
|
|
DELTA_DIRECTION_Y);
|
|
if (!targetFrame.IsAlive()) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (scrollDeltaX) {
|
|
SendLineScrollEvent(aTargetFrame, aEvent, stateX, scrollDeltaX,
|
|
DELTA_DIRECTION_X);
|
|
if (!targetFrame.IsAlive()) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pixelDeltaX) {
|
|
SendPixelScrollEvent(aTargetFrame, aEvent, stateX, pixelDeltaX,
|
|
DELTA_DIRECTION_X);
|
|
if (!targetFrame.IsAlive()) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (stateY.mDefaultPrevented) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
aEvent->PreventDefault(!stateY.mDefaultPreventedByContent);
|
|
}
|
|
|
|
if (stateX.mDefaultPrevented) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
aEvent->PreventDefault(!stateX.mDefaultPreventedByContent);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::SendLineScrollEvent(nsIFrame* aTargetFrame,
|
|
WidgetWheelEvent* aEvent,
|
|
EventState& aState, int32_t aDelta,
|
|
DeltaDirection aDeltaDirection) {
|
|
nsCOMPtr<nsIContent> targetContent = aTargetFrame->GetContent();
|
|
if (!targetContent) targetContent = GetFocusedContent();
|
|
if (!targetContent) return;
|
|
|
|
while (targetContent->IsText()) {
|
|
targetContent = targetContent->GetFlattenedTreeParent();
|
|
}
|
|
|
|
WidgetMouseScrollEvent event(aEvent->IsTrusted(),
|
|
eLegacyMouseLineOrPageScroll, aEvent->mWidget);
|
|
event.mFlags.mDefaultPrevented = aState.mDefaultPrevented;
|
|
event.mFlags.mDefaultPreventedByContent = aState.mDefaultPreventedByContent;
|
|
event.mRefPoint = aEvent->mRefPoint;
|
|
event.mTime = aEvent->mTime;
|
|
event.mTimeStamp = aEvent->mTimeStamp;
|
|
event.mModifiers = aEvent->mModifiers;
|
|
event.mButtons = aEvent->mButtons;
|
|
event.mIsHorizontal = (aDeltaDirection == DELTA_DIRECTION_X);
|
|
event.mDelta = aDelta;
|
|
event.mInputSource = aEvent->mInputSource;
|
|
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
EventDispatcher::Dispatch(targetContent, aTargetFrame->PresContext(), &event,
|
|
nullptr, &status);
|
|
aState.mDefaultPrevented =
|
|
event.DefaultPrevented() || status == nsEventStatus_eConsumeNoDefault;
|
|
aState.mDefaultPreventedByContent = event.DefaultPreventedByContent();
|
|
}
|
|
|
|
void EventStateManager::SendPixelScrollEvent(nsIFrame* aTargetFrame,
|
|
WidgetWheelEvent* aEvent,
|
|
EventState& aState,
|
|
int32_t aPixelDelta,
|
|
DeltaDirection aDeltaDirection) {
|
|
nsCOMPtr<nsIContent> targetContent = aTargetFrame->GetContent();
|
|
if (!targetContent) {
|
|
targetContent = GetFocusedContent();
|
|
if (!targetContent) return;
|
|
}
|
|
|
|
while (targetContent->IsText()) {
|
|
targetContent = targetContent->GetFlattenedTreeParent();
|
|
}
|
|
|
|
WidgetMouseScrollEvent event(aEvent->IsTrusted(), eLegacyMousePixelScroll,
|
|
aEvent->mWidget);
|
|
event.mFlags.mDefaultPrevented = aState.mDefaultPrevented;
|
|
event.mFlags.mDefaultPreventedByContent = aState.mDefaultPreventedByContent;
|
|
event.mRefPoint = aEvent->mRefPoint;
|
|
event.mTime = aEvent->mTime;
|
|
event.mTimeStamp = aEvent->mTimeStamp;
|
|
event.mModifiers = aEvent->mModifiers;
|
|
event.mButtons = aEvent->mButtons;
|
|
event.mIsHorizontal = (aDeltaDirection == DELTA_DIRECTION_X);
|
|
event.mDelta = aPixelDelta;
|
|
event.mInputSource = aEvent->mInputSource;
|
|
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
EventDispatcher::Dispatch(targetContent, aTargetFrame->PresContext(), &event,
|
|
nullptr, &status);
|
|
aState.mDefaultPrevented =
|
|
event.DefaultPrevented() || status == nsEventStatus_eConsumeNoDefault;
|
|
aState.mDefaultPreventedByContent = event.DefaultPreventedByContent();
|
|
}
|
|
|
|
nsIFrame* EventStateManager::ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
nsIFrame* aTargetFrame, WidgetWheelEvent* aEvent,
|
|
ComputeScrollTargetOptions aOptions) {
|
|
return ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
aTargetFrame, aEvent->mDeltaX, aEvent->mDeltaY, aEvent, aOptions);
|
|
}
|
|
|
|
// Overload ComputeScrollTargetAndMayAdjustWheelEvent method to allow passing
|
|
// "test" dx and dy when looking for which scrollbarmediators to activate when
|
|
// two finger down on trackpad and before any actual motion
|
|
nsIFrame* EventStateManager::ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
nsIFrame* aTargetFrame, double aDirectionX, double aDirectionY,
|
|
WidgetWheelEvent* aEvent, ComputeScrollTargetOptions aOptions) {
|
|
if ((aOptions & INCLUDE_PLUGIN_AS_TARGET) &&
|
|
!StaticPrefs::plugin_mousewheel_enabled()) {
|
|
aOptions = RemovePluginFromTarget(aOptions);
|
|
}
|
|
|
|
bool isAutoDir = false;
|
|
bool honoursRoot = false;
|
|
if (MAY_BE_ADJUSTED_BY_AUTO_DIR & aOptions) {
|
|
// If the scroll is respected as auto-dir, aDirection* should always be
|
|
// equivalent to the event's delta vlaues(Currently, there are only one case
|
|
// where aDirection*s have different values from the widget wheel event's
|
|
// original delta values and the only case isn't auto-dir, see
|
|
// ScrollbarsForWheel::TemporarilyActivateAllPossibleScrollTargets).
|
|
MOZ_ASSERT(aDirectionX == aEvent->mDeltaX &&
|
|
aDirectionY == aEvent->mDeltaY);
|
|
|
|
WheelDeltaAdjustmentStrategy strategy =
|
|
GetWheelDeltaAdjustmentStrategy(*aEvent);
|
|
switch (strategy) {
|
|
case WheelDeltaAdjustmentStrategy::eAutoDir:
|
|
isAutoDir = true;
|
|
honoursRoot = false;
|
|
break;
|
|
case WheelDeltaAdjustmentStrategy::eAutoDirWithRootHonour:
|
|
isAutoDir = true;
|
|
honoursRoot = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (aOptions & PREFER_MOUSE_WHEEL_TRANSACTION) {
|
|
// 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. WheelTransaction 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 = WheelTransaction::GetTargetFrame();
|
|
if (lastScrollFrame) {
|
|
if (aOptions & INCLUDE_PLUGIN_AS_TARGET) {
|
|
nsPluginFrame* pluginFrame = do_QueryFrame(lastScrollFrame);
|
|
if (pluginFrame &&
|
|
pluginFrame->WantsToHandleWheelEventAsDefaultAction()) {
|
|
return lastScrollFrame;
|
|
}
|
|
}
|
|
nsIScrollableFrame* scrollableFrame =
|
|
lastScrollFrame->GetScrollTargetFrame();
|
|
if (scrollableFrame) {
|
|
nsIFrame* frameToScroll = do_QueryFrame(scrollableFrame);
|
|
MOZ_ASSERT(frameToScroll);
|
|
if (isAutoDir) {
|
|
ESMAutoDirWheelDeltaAdjuster adjuster(*aEvent, *lastScrollFrame,
|
|
honoursRoot);
|
|
// Note that calling this function will not always cause the delta to
|
|
// be adjusted, it only adjusts the delta when it should, because
|
|
// Adjust() internally calls ShouldBeAdjusted() before making
|
|
// adjustment.
|
|
adjuster.Adjust();
|
|
}
|
|
return frameToScroll;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If the event doesn't cause scroll actually, we cannot find scroll target
|
|
// because we check if the event can cause scroll actually on each found
|
|
// scrollable frame.
|
|
if (!aDirectionX && !aDirectionY) {
|
|
return nullptr;
|
|
}
|
|
|
|
bool checkIfScrollableX;
|
|
bool checkIfScrollableY;
|
|
if (isAutoDir) {
|
|
// Always check the frame's scrollability in both the two directions for an
|
|
// auto-dir scroll. That is, for an auto-dir scroll,
|
|
// PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_X_AXIS and
|
|
// PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_Y_AXIS should be ignored.
|
|
checkIfScrollableX = true;
|
|
checkIfScrollableY = true;
|
|
} else {
|
|
checkIfScrollableX =
|
|
aDirectionX &&
|
|
(aOptions & PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_X_AXIS);
|
|
checkIfScrollableY =
|
|
aDirectionY &&
|
|
(aOptions & PREFER_ACTUAL_SCROLLABLE_TARGET_ALONG_Y_AXIS);
|
|
}
|
|
|
|
nsIFrame* scrollFrame = !(aOptions & START_FROM_PARENT)
|
|
? aTargetFrame
|
|
: GetParentFrameToScroll(aTargetFrame);
|
|
for (; scrollFrame; scrollFrame = GetParentFrameToScroll(scrollFrame)) {
|
|
// Check whether the frame wants to provide us with a scrollable view.
|
|
nsIScrollableFrame* scrollableFrame = scrollFrame->GetScrollTargetFrame();
|
|
if (!scrollableFrame) {
|
|
// If the frame is a plugin frame, then, the plugin content may handle
|
|
// wheel events. Only when the caller computes the scroll target for
|
|
// default action handling, we should assume the plugin frame as
|
|
// scrollable if the plugin wants to handle wheel events as default
|
|
// action.
|
|
if (aOptions & INCLUDE_PLUGIN_AS_TARGET) {
|
|
nsPluginFrame* pluginFrame = do_QueryFrame(scrollFrame);
|
|
if (pluginFrame &&
|
|
pluginFrame->WantsToHandleWheelEventAsDefaultAction()) {
|
|
return scrollFrame;
|
|
}
|
|
}
|
|
nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(scrollFrame);
|
|
if (menuPopupFrame) {
|
|
return nullptr;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
nsIFrame* frameToScroll = do_QueryFrame(scrollableFrame);
|
|
MOZ_ASSERT(frameToScroll);
|
|
|
|
if (!checkIfScrollableX && !checkIfScrollableY) {
|
|
return frameToScroll;
|
|
}
|
|
|
|
// If the frame disregards the direction the user is trying to scroll, then
|
|
// it should just bubbles the scroll event up to its parental scroll frame
|
|
Maybe<layers::ScrollDirection> disregardedDirection =
|
|
WheelHandlingUtils::GetDisregardedWheelScrollDirection(scrollFrame);
|
|
if (disregardedDirection) {
|
|
switch (disregardedDirection.ref()) {
|
|
case layers::ScrollDirection::eHorizontal:
|
|
if (checkIfScrollableX) {
|
|
continue;
|
|
}
|
|
break;
|
|
case layers::ScrollDirection::eVertical:
|
|
if (checkIfScrollableY) {
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
uint32_t directions =
|
|
scrollableFrame->GetAvailableScrollingDirectionsForUserInputEvents();
|
|
if ((!(directions & nsIScrollableFrame::VERTICAL) &&
|
|
!(directions & nsIScrollableFrame::HORIZONTAL)) ||
|
|
(checkIfScrollableY && !checkIfScrollableX &&
|
|
!(directions & nsIScrollableFrame::VERTICAL)) ||
|
|
(checkIfScrollableX && !checkIfScrollableY &&
|
|
!(directions & nsIScrollableFrame::HORIZONTAL))) {
|
|
continue;
|
|
}
|
|
|
|
// Computes whether the currently checked frame is scrollable by this wheel
|
|
// event.
|
|
bool canScroll = false;
|
|
if (isAutoDir) {
|
|
ESMAutoDirWheelDeltaAdjuster adjuster(*aEvent, *scrollFrame, honoursRoot);
|
|
if (adjuster.ShouldBeAdjusted()) {
|
|
adjuster.Adjust();
|
|
canScroll = true;
|
|
} else if (WheelHandlingUtils::CanScrollOn(scrollableFrame, aDirectionX,
|
|
aDirectionY)) {
|
|
canScroll = true;
|
|
}
|
|
} else if (WheelHandlingUtils::CanScrollOn(scrollableFrame, aDirectionX,
|
|
aDirectionY)) {
|
|
canScroll = true;
|
|
}
|
|
|
|
// Comboboxes need special care.
|
|
nsComboboxControlFrame* comboBox = do_QueryFrame(scrollFrame);
|
|
if (comboBox) {
|
|
if (comboBox->IsDroppedDown()) {
|
|
// Don't propagate to parent when drop down menu is active.
|
|
return canScroll ? frameToScroll : nullptr;
|
|
}
|
|
// Always propagate when not dropped down (even if focused).
|
|
continue;
|
|
}
|
|
|
|
if (canScroll) {
|
|
return frameToScroll;
|
|
}
|
|
|
|
// Where we are at is the block ending in a for loop.
|
|
// The current frame has been checked to be unscrollable by this wheel
|
|
// event, continue the loop to check its parent, if any.
|
|
}
|
|
|
|
nsIFrame* newFrame = nsLayoutUtils::GetCrossDocParentFrame(
|
|
aTargetFrame->PresShell()->GetRootFrame());
|
|
aOptions =
|
|
static_cast<ComputeScrollTargetOptions>(aOptions & ~START_FROM_PARENT);
|
|
if (!newFrame) {
|
|
return nullptr;
|
|
}
|
|
return ComputeScrollTargetAndMayAdjustWheelEvent(newFrame, aEvent, aOptions);
|
|
}
|
|
|
|
nsSize EventStateManager::GetScrollAmount(
|
|
nsPresContext* aPresContext, WidgetWheelEvent* aEvent,
|
|
nsIScrollableFrame* aScrollableFrame) {
|
|
MOZ_ASSERT(aPresContext);
|
|
MOZ_ASSERT(aEvent);
|
|
|
|
bool isPage = (aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_PAGE);
|
|
if (aScrollableFrame) {
|
|
return isPage ? aScrollableFrame->GetPageScrollAmount()
|
|
: aScrollableFrame->GetLineScrollAmount();
|
|
}
|
|
|
|
// If there is no scrollable frame and page scrolling, use viewport size.
|
|
if (isPage) {
|
|
return aPresContext->GetVisibleArea().Size();
|
|
}
|
|
|
|
// If there is no scrollable frame, we should use root frame's information.
|
|
nsIFrame* rootFrame = aPresContext->PresShell()->GetRootFrame();
|
|
if (!rootFrame) {
|
|
return nsSize(0, 0);
|
|
}
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetInflatedFontMetricsForFrame(rootFrame);
|
|
NS_ENSURE_TRUE(fm, nsSize(0, 0));
|
|
return nsSize(fm->AveCharWidth(), fm->MaxHeight());
|
|
}
|
|
|
|
void EventStateManager::DoScrollText(nsIScrollableFrame* aScrollableFrame,
|
|
WidgetWheelEvent* aEvent) {
|
|
MOZ_ASSERT(aScrollableFrame);
|
|
MOZ_ASSERT(aEvent);
|
|
|
|
nsIFrame* scrollFrame = do_QueryFrame(aScrollableFrame);
|
|
MOZ_ASSERT(scrollFrame);
|
|
|
|
AutoWeakFrame scrollFrameWeak(scrollFrame);
|
|
if (!WheelTransaction::WillHandleDefaultAction(aEvent, scrollFrameWeak)) {
|
|
return;
|
|
}
|
|
|
|
// Default action's actual scroll amount should be computed from device
|
|
// pixels.
|
|
nsPresContext* pc = scrollFrame->PresContext();
|
|
nsSize scrollAmount = GetScrollAmount(pc, aEvent, aScrollableFrame);
|
|
nsIntSize scrollAmountInDevPixels(
|
|
pc->AppUnitsToDevPixels(scrollAmount.width),
|
|
pc->AppUnitsToDevPixels(scrollAmount.height));
|
|
nsIntPoint actualDevPixelScrollAmount =
|
|
DeltaAccumulator::GetInstance()->ComputeScrollAmountForDefaultAction(
|
|
aEvent, scrollAmountInDevPixels);
|
|
|
|
// Don't scroll around the axis whose overflow style is hidden.
|
|
ScrollStyles overflowStyle = aScrollableFrame->GetScrollStyles();
|
|
if (overflowStyle.mHorizontal == StyleOverflow::Hidden) {
|
|
actualDevPixelScrollAmount.x = 0;
|
|
}
|
|
if (overflowStyle.mVertical == StyleOverflow::Hidden) {
|
|
actualDevPixelScrollAmount.y = 0;
|
|
}
|
|
|
|
nsIScrollbarMediator::ScrollSnapMode snapMode =
|
|
nsIScrollbarMediator::DISABLE_SNAP;
|
|
mozilla::ScrollOrigin origin = mozilla::ScrollOrigin::NotSpecified;
|
|
switch (aEvent->mDeltaMode) {
|
|
case WheelEvent_Binding::DOM_DELTA_LINE:
|
|
origin = mozilla::ScrollOrigin::MouseWheel;
|
|
snapMode = nsIScrollableFrame::ENABLE_SNAP;
|
|
break;
|
|
case WheelEvent_Binding::DOM_DELTA_PAGE:
|
|
origin = mozilla::ScrollOrigin::Pages;
|
|
snapMode = nsIScrollableFrame::ENABLE_SNAP;
|
|
break;
|
|
case WheelEvent_Binding::DOM_DELTA_PIXEL:
|
|
origin = mozilla::ScrollOrigin::Pixels;
|
|
break;
|
|
default:
|
|
MOZ_CRASH("Invalid deltaMode value comes");
|
|
}
|
|
|
|
// We shouldn't scroll more one page at once except when over one page scroll
|
|
// is allowed for the event.
|
|
nsSize pageSize = aScrollableFrame->GetPageScrollAmount();
|
|
nsIntSize devPixelPageSize(pc->AppUnitsToDevPixels(pageSize.width),
|
|
pc->AppUnitsToDevPixels(pageSize.height));
|
|
if (!WheelPrefs::GetInstance()->IsOverOnePageScrollAllowedX(aEvent) &&
|
|
DeprecatedAbs(actualDevPixelScrollAmount.x) > devPixelPageSize.width) {
|
|
actualDevPixelScrollAmount.x = (actualDevPixelScrollAmount.x >= 0)
|
|
? devPixelPageSize.width
|
|
: -devPixelPageSize.width;
|
|
}
|
|
|
|
if (!WheelPrefs::GetInstance()->IsOverOnePageScrollAllowedY(aEvent) &&
|
|
DeprecatedAbs(actualDevPixelScrollAmount.y) > devPixelPageSize.height) {
|
|
actualDevPixelScrollAmount.y = (actualDevPixelScrollAmount.y >= 0)
|
|
? devPixelPageSize.height
|
|
: -devPixelPageSize.height;
|
|
}
|
|
|
|
bool isDeltaModePixel =
|
|
(aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_PIXEL);
|
|
|
|
ScrollMode mode;
|
|
switch (aEvent->mScrollType) {
|
|
case WidgetWheelEvent::SCROLL_DEFAULT:
|
|
if (isDeltaModePixel) {
|
|
mode = ScrollMode::Normal;
|
|
} else if (aEvent->mFlags.mHandledByAPZ) {
|
|
mode = ScrollMode::SmoothMsd;
|
|
} else {
|
|
mode = ScrollMode::Smooth;
|
|
}
|
|
break;
|
|
case WidgetWheelEvent::SCROLL_SYNCHRONOUSLY:
|
|
mode = ScrollMode::Instant;
|
|
break;
|
|
case WidgetWheelEvent::SCROLL_ASYNCHRONOUSELY:
|
|
mode = ScrollMode::Normal;
|
|
break;
|
|
case WidgetWheelEvent::SCROLL_SMOOTHLY:
|
|
mode = ScrollMode::Smooth;
|
|
break;
|
|
default:
|
|
MOZ_CRASH("Invalid mScrollType value comes");
|
|
}
|
|
|
|
nsIScrollableFrame::ScrollMomentum momentum =
|
|
aEvent->mIsMomentum ? nsIScrollableFrame::SYNTHESIZED_MOMENTUM_EVENT
|
|
: nsIScrollableFrame::NOT_MOMENTUM;
|
|
|
|
nsIntPoint overflow;
|
|
aScrollableFrame->ScrollBy(actualDevPixelScrollAmount,
|
|
ScrollUnit::DEVICE_PIXELS, mode, &overflow, origin,
|
|
momentum, snapMode);
|
|
|
|
if (!scrollFrameWeak.IsAlive()) {
|
|
// If the scroll causes changing the layout, we can think that the event
|
|
// has been completely consumed by the content. Then, users probably don't
|
|
// want additional action.
|
|
aEvent->mOverflowDeltaX = aEvent->mOverflowDeltaY = 0;
|
|
} else if (isDeltaModePixel) {
|
|
aEvent->mOverflowDeltaX = overflow.x;
|
|
aEvent->mOverflowDeltaY = overflow.y;
|
|
} else {
|
|
aEvent->mOverflowDeltaX =
|
|
static_cast<double>(overflow.x) / scrollAmountInDevPixels.width;
|
|
aEvent->mOverflowDeltaY =
|
|
static_cast<double>(overflow.y) / scrollAmountInDevPixels.height;
|
|
}
|
|
|
|
// If CSS overflow properties caused not to scroll, the overflowDelta* values
|
|
// should be same as delta* values since they may be used as gesture event by
|
|
// widget. However, if there is another scrollable element in the ancestor
|
|
// along the axis, probably users don't want the operation to cause
|
|
// additional action such as moving history. In such case, overflowDelta
|
|
// values should stay zero.
|
|
if (scrollFrameWeak.IsAlive()) {
|
|
if (aEvent->mDeltaX && overflowStyle.mHorizontal == StyleOverflow::Hidden &&
|
|
!ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
scrollFrame, aEvent,
|
|
COMPUTE_SCROLLABLE_ANCESTOR_ALONG_X_AXIS_WITH_AUTO_DIR)) {
|
|
aEvent->mOverflowDeltaX = aEvent->mDeltaX;
|
|
}
|
|
if (aEvent->mDeltaY && overflowStyle.mVertical == StyleOverflow::Hidden &&
|
|
!ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
scrollFrame, aEvent,
|
|
COMPUTE_SCROLLABLE_ANCESTOR_ALONG_Y_AXIS_WITH_AUTO_DIR)) {
|
|
aEvent->mOverflowDeltaY = aEvent->mDeltaY;
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(
|
|
aEvent->mOverflowDeltaX == 0 ||
|
|
(aEvent->mOverflowDeltaX > 0) == (aEvent->mDeltaX > 0),
|
|
"The sign of mOverflowDeltaX is different from the scroll direction");
|
|
NS_ASSERTION(
|
|
aEvent->mOverflowDeltaY == 0 ||
|
|
(aEvent->mOverflowDeltaY > 0) == (aEvent->mDeltaY > 0),
|
|
"The sign of mOverflowDeltaY is different from the scroll direction");
|
|
|
|
WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(aEvent);
|
|
}
|
|
|
|
void EventStateManager::DecideGestureEvent(WidgetGestureNotifyEvent* aEvent,
|
|
nsIFrame* targetFrame) {
|
|
NS_ASSERTION(aEvent->mMessage == eGestureNotify,
|
|
"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
|
|
*/
|
|
WidgetGestureNotifyEvent::PanDirection panDirection =
|
|
WidgetGestureNotifyEvent::ePanNone;
|
|
bool displayPanFeedback = false;
|
|
for (nsIFrame* current = targetFrame; current;
|
|
current = nsLayoutUtils::GetCrossDocParentFrame(current)) {
|
|
// e10s - mark remote content as pannable. This is a work around since
|
|
// we don't have access to remote frame scroll info here. Apz data may
|
|
// assist is solving this.
|
|
if (current && IsTopLevelRemoteTarget(current->GetContent())) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanBoth;
|
|
// We don't know when we reach bounds, so just disable feedback for now.
|
|
displayPanFeedback = false;
|
|
break;
|
|
}
|
|
|
|
LayoutFrameType currentFrameType = current->Type();
|
|
|
|
// Scrollbars should always be draggable
|
|
if (currentFrameType == LayoutFrameType::Scrollbar) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanNone;
|
|
break;
|
|
}
|
|
|
|
#ifdef MOZ_XUL
|
|
// Special check for trees
|
|
nsTreeBodyFrame* treeFrame = do_QueryFrame(current);
|
|
if (treeFrame) {
|
|
if (treeFrame->GetHorizontalOverflow()) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
|
|
}
|
|
if (treeFrame->GetVerticalOverflow()) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanVertical;
|
|
}
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
nsIScrollableFrame* scrollableFrame = do_QueryFrame(current);
|
|
if (scrollableFrame) {
|
|
if (current->IsFrameOfType(nsIFrame::eXULBox)) {
|
|
displayPanFeedback = true;
|
|
|
|
nsRect scrollRange = scrollableFrame->GetScrollRange();
|
|
bool canScrollHorizontally = scrollRange.width > 0;
|
|
|
|
if (targetFrame->IsMenuFrame()) {
|
|
// menu frames report horizontal scroll when they have submenus
|
|
// and we don't want that
|
|
canScrollHorizontally = false;
|
|
displayPanFeedback = 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 = WidgetGestureNotifyEvent::ePanVertical;
|
|
break;
|
|
}
|
|
|
|
if (canScrollHorizontally) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
|
|
displayPanFeedback = false;
|
|
}
|
|
} else { // Not a XUL box
|
|
uint32_t scrollbarVisibility =
|
|
scrollableFrame->GetScrollbarVisibility();
|
|
|
|
// Check if we have visible scrollbars
|
|
if (scrollbarVisibility & nsIScrollableFrame::VERTICAL) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanVertical;
|
|
displayPanFeedback = true;
|
|
break;
|
|
}
|
|
|
|
if (scrollbarVisibility & nsIScrollableFrame::HORIZONTAL) {
|
|
panDirection = WidgetGestureNotifyEvent::ePanHorizontal;
|
|
displayPanFeedback = true;
|
|
}
|
|
}
|
|
} // scrollableFrame
|
|
} // ancestor chain
|
|
aEvent->mDisplayPanFeedback = displayPanFeedback;
|
|
aEvent->mPanDirection = panDirection;
|
|
}
|
|
|
|
#ifdef XP_MACOSX
|
|
static bool NodeAllowsClickThrough(nsINode* aNode) {
|
|
while (aNode) {
|
|
if (aNode->IsXULElement(nsGkAtoms::browser)) {
|
|
return false;
|
|
}
|
|
if (aNode->IsXULElement()) {
|
|
mozilla::dom::Element* element = aNode->AsElement();
|
|
static Element::AttrValuesArray strings[] = {nsGkAtoms::always,
|
|
nsGkAtoms::never, nullptr};
|
|
switch (element->FindAttrValueIn(
|
|
kNameSpaceID_None, nsGkAtoms::clickthrough, strings, eCaseMatters)) {
|
|
case 0:
|
|
return true;
|
|
case 1:
|
|
return false;
|
|
}
|
|
}
|
|
aNode = nsContentUtils::GetCrossDocParentNode(aNode);
|
|
}
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
void EventStateManager::PostHandleKeyboardEvent(
|
|
WidgetKeyboardEvent* aKeyboardEvent, nsIFrame* aTargetFrame,
|
|
nsEventStatus& aStatus) {
|
|
if (aStatus == nsEventStatus_eConsumeNoDefault) {
|
|
return;
|
|
}
|
|
|
|
if (!aKeyboardEvent->HasBeenPostedToRemoteProcess()) {
|
|
if (aKeyboardEvent->IsWaitingReplyFromRemoteProcess()) {
|
|
RefPtr<BrowserParent> remote =
|
|
aTargetFrame ? BrowserParent::GetFrom(aTargetFrame->GetContent())
|
|
: nullptr;
|
|
if (remote) {
|
|
// remote is null-checked above in order to let pre-existing event
|
|
// targeting code's chrome vs. content decision override in case of
|
|
// disagreement in order not to disrupt non-Fission e10s mode in case
|
|
// there are still bugs in the Fission-mode code. That is, if remote
|
|
// is nullptr, the pre-existing event targeting code has deemed this
|
|
// event to belong to chrome rather than content.
|
|
BrowserParent* preciseRemote = BrowserParent::GetFocused();
|
|
if (preciseRemote) {
|
|
remote = preciseRemote;
|
|
}
|
|
// else there was a race between layout and focus tracking
|
|
}
|
|
if (remote && !remote->IsReadyToHandleInputEvents()) {
|
|
// We need to dispatch the event to the browser element again if we were
|
|
// waiting for the key reply but the event wasn't sent to the content
|
|
// process due to the remote browser wasn't ready.
|
|
WidgetKeyboardEvent keyEvent(*aKeyboardEvent);
|
|
aKeyboardEvent->MarkAsHandledInRemoteProcess();
|
|
EventDispatcher::Dispatch(remote->GetOwnerElement(), mPresContext,
|
|
&keyEvent);
|
|
if (keyEvent.DefaultPrevented()) {
|
|
aKeyboardEvent->PreventDefault(!keyEvent.DefaultPreventedByContent());
|
|
aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
// The widget expects a reply for every keyboard event. If the event wasn't
|
|
// dispatched to a content process (non-e10s or no content process
|
|
// running), we need to short-circuit here. Otherwise, we need to wait for
|
|
// the content process to handle the event.
|
|
if (aKeyboardEvent->mWidget) {
|
|
aKeyboardEvent->mWidget->PostHandleKeyEvent(aKeyboardEvent);
|
|
}
|
|
if (aKeyboardEvent->DefaultPrevented()) {
|
|
aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// XXX Currently, our automated tests don't support mKeyNameIndex.
|
|
// Therefore, we still need to handle this with keyCode.
|
|
switch (aKeyboardEvent->mKeyCode) {
|
|
case NS_VK_TAB:
|
|
case NS_VK_F6:
|
|
// This is to prevent keyboard scrolling while alt modifier in use.
|
|
if (!aKeyboardEvent->IsAlt()) {
|
|
aStatus = nsEventStatus_eConsumeNoDefault;
|
|
|
|
// Handling the tab event after it was sent to content is bad,
|
|
// because to the FocusManager the remote-browser looks like one
|
|
// element, so we would just move the focus to the next element
|
|
// in chrome, instead of handling it in content.
|
|
if (aKeyboardEvent->HasBeenPostedToRemoteProcess()) {
|
|
break;
|
|
}
|
|
|
|
EnsureDocument(mPresContext);
|
|
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
|
|
if (fm && mDocument) {
|
|
// Shift focus forward or back depending on shift key
|
|
bool isDocMove = aKeyboardEvent->IsControl() ||
|
|
aKeyboardEvent->mKeyCode == NS_VK_F6;
|
|
uint32_t dir =
|
|
aKeyboardEvent->IsShift()
|
|
? (isDocMove ? static_cast<uint32_t>(
|
|
nsIFocusManager::MOVEFOCUS_BACKWARDDOC)
|
|
: static_cast<uint32_t>(
|
|
nsIFocusManager::MOVEFOCUS_BACKWARD))
|
|
: (isDocMove ? static_cast<uint32_t>(
|
|
nsIFocusManager::MOVEFOCUS_FORWARDDOC)
|
|
: static_cast<uint32_t>(
|
|
nsIFocusManager::MOVEFOCUS_FORWARD));
|
|
RefPtr<Element> result;
|
|
fm->MoveFocus(mDocument->GetWindow(), nullptr, dir,
|
|
nsIFocusManager::FLAG_BYKEY, getter_AddRefs(result));
|
|
}
|
|
}
|
|
return;
|
|
case 0:
|
|
// We handle keys with no specific keycode value below.
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
switch (aKeyboardEvent->mKeyNameIndex) {
|
|
case KEY_NAME_INDEX_ZoomIn:
|
|
case KEY_NAME_INDEX_ZoomOut:
|
|
ChangeZoom(aKeyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_ZoomIn);
|
|
aStatus = nsEventStatus_eConsumeNoDefault;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
nsresult EventStateManager::PostHandleEvent(nsPresContext* aPresContext,
|
|
WidgetEvent* aEvent,
|
|
nsIFrame* aTargetFrame,
|
|
nsEventStatus* aStatus,
|
|
nsIContent* aOverrideClickTarget) {
|
|
NS_ENSURE_ARG(aPresContext);
|
|
NS_ENSURE_ARG_POINTER(aStatus);
|
|
|
|
mCurrentTarget = aTargetFrame;
|
|
mCurrentTargetContent = nullptr;
|
|
|
|
HandleCrossProcessEvent(aEvent, aStatus);
|
|
// NOTE: the above call may have destroyed aTargetFrame, please use
|
|
// mCurrentTarget henceforth. This is to avoid using it accidentally:
|
|
aTargetFrame = nullptr;
|
|
|
|
// Most of the events we handle below require a frame.
|
|
// Add special cases here.
|
|
if (!mCurrentTarget && aEvent->mMessage != eMouseUp &&
|
|
aEvent->mMessage != eMouseDown && aEvent->mMessage != eDragEnter &&
|
|
aEvent->mMessage != eDragOver) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Keep the prescontext alive, we might need it after event dispatch
|
|
RefPtr<nsPresContext> presContext = aPresContext;
|
|
nsresult ret = NS_OK;
|
|
|
|
switch (aEvent->mMessage) {
|
|
case eMouseDown: {
|
|
WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
|
|
if (mouseEvent->mButton == MouseButton::ePrimary &&
|
|
!sNormalLMouseEventInProcess) {
|
|
// We got a mouseup event while a mousedown event was being processed.
|
|
// Make sure that the capturing content is cleared.
|
|
PresShell::ReleaseCapturingContent();
|
|
break;
|
|
}
|
|
|
|
// For remote content, capture the event in the parent process at the
|
|
// <xul:browser remote> element. This will ensure that subsequent
|
|
// mousemove/mouseup events will continue to be dispatched to this element
|
|
// and therefore forwarded to the child.
|
|
if (aEvent->HasBeenPostedToRemoteProcess() &&
|
|
!PresShell::GetCapturingContent()) {
|
|
if (nsIContent* content =
|
|
mCurrentTarget ? mCurrentTarget->GetContent() : nullptr) {
|
|
PresShell::SetCapturingContent(content, CaptureFlags::None);
|
|
} else {
|
|
PresShell::ReleaseCapturingContent();
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> activeContent;
|
|
// When content calls PreventDefault on pointerdown, we also call
|
|
// PreventDefault on the subsequent mouse events to suppress default
|
|
// behaviors. Normally, aStatus should be nsEventStatus_eConsumeNoDefault
|
|
// when the event is DefaultPrevented but it's reset to
|
|
// nsEventStatus_eIgnore in EventStateManager::PreHandleEvent. So we also
|
|
// check if the event is DefaultPrevented.
|
|
if (nsEventStatus_eConsumeNoDefault != *aStatus &&
|
|
!aEvent->DefaultPrevented()) {
|
|
nsCOMPtr<nsIContent> newFocus;
|
|
bool suppressBlur = false;
|
|
if (mCurrentTarget) {
|
|
mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(newFocus));
|
|
const nsStyleUI* ui = mCurrentTarget->StyleUI();
|
|
activeContent = mCurrentTarget->GetContent();
|
|
|
|
// In some cases, we do not want to even blur the current focused
|
|
// element. Those cases are:
|
|
// 1. -moz-user-focus CSS property is set to 'ignore';
|
|
// 2. XUL control element has the disabled property set to 'true'.
|
|
//
|
|
// We can't use nsIFrame::IsFocusable() because we want to blur when
|
|
// we click on a visibility: none element.
|
|
// We can't use nsIContent::IsFocusable() because we want to blur when
|
|
// we click on a non-focusable element like a <div>.
|
|
// We have to use |aEvent->mTarget| to not make sure we do not check
|
|
// an anonymous node of the targeted element.
|
|
suppressBlur = (ui->mUserFocus == StyleUserFocus::Ignore);
|
|
|
|
nsCOMPtr<Element> element = do_QueryInterface(aEvent->mTarget);
|
|
if (!suppressBlur && element) {
|
|
nsCOMPtr<nsIDOMXULControlElement> xulControl =
|
|
element->AsXULControl();
|
|
if (xulControl) {
|
|
bool disabled = false;
|
|
xulControl->GetDisabled(&disabled);
|
|
suppressBlur = disabled;
|
|
}
|
|
}
|
|
}
|
|
|
|
// When a root content which isn't editable but has an editable HTML
|
|
// <body> element is clicked, we should redirect the focus to the
|
|
// the <body> element. E.g., when an user click bottom of the editor
|
|
// where is outside of the <body> element, the <body> 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()) {
|
|
Document* doc = newFocus->GetComposedDoc();
|
|
if (doc && newFocus == doc->GetRootElement()) {
|
|
nsIContent* bodyContent =
|
|
nsLayoutUtils::GetEditableRootContentByContentEditable(doc);
|
|
if (bodyContent && bodyContent->GetPrimaryFrame()) {
|
|
newFocus = bodyContent;
|
|
}
|
|
}
|
|
}
|
|
|
|
// When the mouse is pressed, the default action is to focus the
|
|
// target. Look for the nearest enclosing focusable frame.
|
|
//
|
|
// TODO: Probably this should be moved to Element::PostHandleEvent.
|
|
for (; newFocus; newFocus = newFocus->GetFlattenedTreeParent()) {
|
|
if (!newFocus->IsElement()) {
|
|
continue;
|
|
}
|
|
|
|
nsIFrame* frame = newFocus->GetPrimaryFrame();
|
|
if (!frame) {
|
|
continue;
|
|
}
|
|
|
|
// If the mousedown happened inside a popup, don't try to set focus on
|
|
// one of its containing elements
|
|
if (frame->StyleDisplay()->mDisplay == StyleDisplay::MozPopup) {
|
|
newFocus = nullptr;
|
|
break;
|
|
}
|
|
|
|
int32_t tabIndexUnused;
|
|
if (frame->IsFocusable(&tabIndexUnused, true)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT_IF(newFocus, newFocus->IsElement());
|
|
|
|
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) {
|
|
// use the mouse flag and the noscroll flag so that the content
|
|
// doesn't unexpectedly scroll when clicking an element that is
|
|
// only half visible
|
|
uint32_t flags =
|
|
nsIFocusManager::FLAG_BYMOUSE | nsIFocusManager::FLAG_NOSCROLL;
|
|
// If this was a touch-generated event, pass that information:
|
|
if (mouseEvent->mInputSource ==
|
|
MouseEvent_Binding::MOZ_SOURCE_TOUCH) {
|
|
flags |= nsIFocusManager::FLAG_BYTOUCH;
|
|
}
|
|
fm->SetFocus(newFocus->AsElement(), flags);
|
|
} 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->IsXULElement())
|
|
#endif
|
|
fm->ClearFocus(mDocument->GetWindow());
|
|
fm->SetFocusedWindow(mDocument->GetWindow());
|
|
}
|
|
}
|
|
}
|
|
|
|
// The rest is left button-specific.
|
|
if (mouseEvent->mButton != MouseButton::ePrimary) {
|
|
break;
|
|
}
|
|
|
|
// The nearest enclosing element goes into the :active state. If we're
|
|
// not an element (so we're text or something) we need to obtain
|
|
// our parent element and put it into :active instead.
|
|
if (activeContent && !activeContent->IsElement()) {
|
|
if (nsIContent* par = activeContent->GetFlattenedTreeParent()) {
|
|
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(true);
|
|
}
|
|
SetActiveManager(this, activeContent);
|
|
} break;
|
|
case ePointerCancel:
|
|
case ePointerUp: {
|
|
WidgetPointerEvent* pointerEvent = aEvent->AsPointerEvent();
|
|
MOZ_ASSERT(pointerEvent);
|
|
// Implicitly releasing capture for given pointer. ePointerLostCapture
|
|
// should be send after ePointerUp or ePointerCancel.
|
|
PointerEventHandler::ImplicitlyReleasePointerCapture(pointerEvent);
|
|
|
|
if (pointerEvent->mMessage == ePointerCancel ||
|
|
pointerEvent->mInputSource == MouseEvent_Binding::MOZ_SOURCE_TOUCH) {
|
|
// After pointercancel, pointer becomes invalid so we can remove
|
|
// relevant helper from table. Regarding pointerup with non-hoverable
|
|
// device, the pointer also becomes invalid. Hoverable (mouse/pen)
|
|
// pointers are valid all the time (not only between down/up).
|
|
GenerateMouseEnterExit(pointerEvent);
|
|
mPointersEnterLeaveHelper.Remove(pointerEvent->pointerId);
|
|
}
|
|
break;
|
|
}
|
|
case eMouseUp: {
|
|
ClearGlobalActiveContent(this);
|
|
WidgetMouseEvent* mouseUpEvent = aEvent->AsMouseEvent();
|
|
if (mouseUpEvent && EventCausesClickEvents(*mouseUpEvent)) {
|
|
// Make sure to dispatch the click even if there is no frame for
|
|
// the current target element. This is required for Web compatibility.
|
|
RefPtr<EventStateManager> esm =
|
|
ESMFromContentOrThis(aOverrideClickTarget);
|
|
ret =
|
|
esm->PostHandleMouseUp(mouseUpEvent, aStatus, aOverrideClickTarget);
|
|
}
|
|
|
|
if (PresShell* presShell = presContext->GetPresShell()) {
|
|
RefPtr<nsFrameSelection> frameSelection = presShell->FrameSelection();
|
|
frameSelection->SetDragState(false);
|
|
}
|
|
} break;
|
|
case eWheelOperationEnd: {
|
|
MOZ_ASSERT(aEvent->IsTrusted());
|
|
ScrollbarsForWheel::MayInactivate();
|
|
WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
|
|
nsIScrollableFrame* scrollTarget =
|
|
do_QueryFrame(ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
mCurrentTarget, wheelEvent,
|
|
COMPUTE_DEFAULT_ACTION_TARGET_WITH_AUTO_DIR));
|
|
if (scrollTarget) {
|
|
scrollTarget->ScrollSnap();
|
|
}
|
|
} break;
|
|
case eWheel:
|
|
case eWheelOperationStart: {
|
|
MOZ_ASSERT(aEvent->IsTrusted());
|
|
|
|
if (*aStatus == nsEventStatus_eConsumeNoDefault) {
|
|
ScrollbarsForWheel::Inactivate();
|
|
break;
|
|
}
|
|
|
|
WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
|
|
MOZ_ASSERT(wheelEvent);
|
|
|
|
// When APZ is enabled, the actual scroll animation might be handled by
|
|
// the compositor.
|
|
WheelPrefs::Action action =
|
|
wheelEvent->mFlags.mHandledByAPZ
|
|
? WheelPrefs::ACTION_NONE
|
|
: WheelPrefs::GetInstance()->ComputeActionFor(wheelEvent);
|
|
|
|
WheelDeltaAdjustmentStrategy strategy =
|
|
GetWheelDeltaAdjustmentStrategy(*wheelEvent);
|
|
// Adjust the delta values of the wheel event if the current default
|
|
// action is to horizontalize scrolling. I.e., deltaY values are set to
|
|
// deltaX and deltaY and deltaZ values are set to 0.
|
|
// If horizontalized, the delta values will be restored and its overflow
|
|
// deltaX will become 0 when the WheelDeltaHorizontalizer instance is
|
|
// being destroyed.
|
|
WheelDeltaHorizontalizer horizontalizer(*wheelEvent);
|
|
if (WheelDeltaAdjustmentStrategy::eHorizontalize == strategy) {
|
|
horizontalizer.Horizontalize();
|
|
}
|
|
|
|
// Since ComputeScrollTargetAndMayAdjustWheelEvent() may adjust the delta
|
|
// if the event is auto-dir. So we use |ESMAutoDirWheelDeltaRestorer|
|
|
// here.
|
|
// An instance of |ESMAutoDirWheelDeltaRestorer| is used to monitor
|
|
// auto-dir adjustment which may happen during its lifetime. If the delta
|
|
// values is adjusted during its lifetime, the instance will restore the
|
|
// adjusted delta when it's being destrcuted.
|
|
ESMAutoDirWheelDeltaRestorer restorer(*wheelEvent);
|
|
// Check if the frame to scroll before checking the default action
|
|
// because if the scroll target is a plugin, the default action should be
|
|
// chosen by the plugin rather than by our prefs.
|
|
nsIFrame* frameToScroll = ComputeScrollTargetAndMayAdjustWheelEvent(
|
|
mCurrentTarget, wheelEvent,
|
|
COMPUTE_DEFAULT_ACTION_TARGET_WITH_AUTO_DIR);
|
|
nsPluginFrame* pluginFrame = do_QueryFrame(frameToScroll);
|
|
if (pluginFrame) {
|
|
MOZ_ASSERT(pluginFrame->WantsToHandleWheelEventAsDefaultAction());
|
|
// Plugins should receive original values instead of adjusted values.
|
|
horizontalizer.CancelHorizontalization();
|
|
action = WheelPrefs::ACTION_SEND_TO_PLUGIN;
|
|
}
|
|
|
|
switch (action) {
|
|
case WheelPrefs::ACTION_SCROLL:
|
|
case WheelPrefs::ACTION_HORIZONTALIZED_SCROLL: {
|
|
// For scrolling of default action, we should honor the mouse wheel
|
|
// transaction.
|
|
|
|
ScrollbarsForWheel::PrepareToScrollText(this, mCurrentTarget,
|
|
wheelEvent);
|
|
|
|
if (aEvent->mMessage != eWheel ||
|
|
(!wheelEvent->mDeltaX && !wheelEvent->mDeltaY)) {
|
|
break;
|
|
}
|
|
|
|
nsIScrollableFrame* scrollTarget = do_QueryFrame(frameToScroll);
|
|
ScrollbarsForWheel::SetActiveScrollTarget(scrollTarget);
|
|
|
|
nsIFrame* rootScrollFrame =
|
|
!mCurrentTarget
|
|
? nullptr
|
|
: mCurrentTarget->PresShell()->GetRootScrollFrame();
|
|
nsIScrollableFrame* rootScrollableFrame = nullptr;
|
|
if (rootScrollFrame) {
|
|
rootScrollableFrame = do_QueryFrame(rootScrollFrame);
|
|
}
|
|
if (!scrollTarget || scrollTarget == rootScrollableFrame) {
|
|
wheelEvent->mViewPortIsOverscrolled = true;
|
|
}
|
|
wheelEvent->mOverflowDeltaX = wheelEvent->mDeltaX;
|
|
wheelEvent->mOverflowDeltaY = wheelEvent->mDeltaY;
|
|
WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(
|
|
wheelEvent);
|
|
if (scrollTarget) {
|
|
DoScrollText(scrollTarget, wheelEvent);
|
|
} else {
|
|
WheelTransaction::EndTransaction();
|
|
ScrollbarsForWheel::Inactivate();
|
|
}
|
|
break;
|
|
}
|
|
case WheelPrefs::ACTION_HISTORY: {
|
|
// If this event doesn't cause eLegacyMouseLineOrPageScroll event or
|
|
// the direction is oblique, don't perform history back/forward.
|
|
int32_t intDelta = wheelEvent->GetPreferredIntDelta();
|
|
if (!intDelta) {
|
|
break;
|
|
}
|
|
DoScrollHistory(intDelta);
|
|
break;
|
|
}
|
|
case WheelPrefs::ACTION_ZOOM: {
|
|
// If this event doesn't cause eLegacyMouseLineOrPageScroll event or
|
|
// the direction is oblique, don't perform zoom in/out.
|
|
int32_t intDelta = wheelEvent->GetPreferredIntDelta();
|
|
if (!intDelta) {
|
|
break;
|
|
}
|
|
DoScrollZoom(mCurrentTarget, intDelta);
|
|
break;
|
|
}
|
|
case WheelPrefs::ACTION_SEND_TO_PLUGIN:
|
|
MOZ_ASSERT(pluginFrame);
|
|
|
|
if (wheelEvent->mMessage != eWheel ||
|
|
(!wheelEvent->mDeltaX && !wheelEvent->mDeltaY)) {
|
|
break;
|
|
}
|
|
|
|
MOZ_ASSERT(static_cast<void*>(frameToScroll) ==
|
|
static_cast<void*>(pluginFrame));
|
|
if (!WheelTransaction::WillHandleDefaultAction(wheelEvent,
|
|
frameToScroll)) {
|
|
break;
|
|
}
|
|
|
|
pluginFrame->HandleWheelEventAsDefaultAction(wheelEvent);
|
|
break;
|
|
case WheelPrefs::ACTION_NONE:
|
|
default:
|
|
bool allDeltaOverflown = false;
|
|
if (wheelEvent->mFlags.mHandledByAPZ) {
|
|
if (wheelEvent->mCanTriggerSwipe) {
|
|
// For events that can trigger swipes, APZ needs to know whether
|
|
// scrolling is possible in the requested direction. It does this
|
|
// by looking at the scroll overflow values on mCanTriggerSwipe
|
|
// events after they have been processed.
|
|
allDeltaOverflown = !ComputeScrollTarget(
|
|
mCurrentTarget, wheelEvent, COMPUTE_DEFAULT_ACTION_TARGET);
|
|
}
|
|
} else {
|
|
// The event was processed neither by APZ nor by us, so all of the
|
|
// delta values must be overflown delta values.
|
|
allDeltaOverflown = true;
|
|
}
|
|
|
|
if (!allDeltaOverflown) {
|
|
break;
|
|
}
|
|
wheelEvent->mOverflowDeltaX = wheelEvent->mDeltaX;
|
|
wheelEvent->mOverflowDeltaY = wheelEvent->mDeltaY;
|
|
WheelPrefs::GetInstance()->CancelApplyingUserPrefsFromOverflowDelta(
|
|
wheelEvent);
|
|
wheelEvent->mViewPortIsOverscrolled = true;
|
|
break;
|
|
}
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
} break;
|
|
|
|
case eGestureNotify: {
|
|
if (nsEventStatus_eConsumeNoDefault != *aStatus) {
|
|
DecideGestureEvent(aEvent->AsGestureNotifyEvent(), mCurrentTarget);
|
|
}
|
|
} break;
|
|
|
|
case eDragEnter:
|
|
case eDragOver: {
|
|
NS_ASSERTION(aEvent->mClass == eDragEventClass, "Expected a drag event");
|
|
|
|
// Check if the drag is occurring inside a scrollable area. If so, scroll
|
|
// the area when the mouse is near the edges.
|
|
if (mCurrentTarget && aEvent->mMessage == eDragOver) {
|
|
nsIFrame* checkFrame = mCurrentTarget;
|
|
while (checkFrame) {
|
|
nsIScrollableFrame* scrollFrame = do_QueryFrame(checkFrame);
|
|
// Break out so only the innermost scrollframe is scrolled.
|
|
if (scrollFrame && scrollFrame->DragScroll(aEvent)) {
|
|
break;
|
|
}
|
|
checkFrame = checkFrame->GetParent();
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
|
|
if (!dragSession) break;
|
|
|
|
// Reset the flag.
|
|
dragSession->SetOnlyChromeDrop(false);
|
|
if (mPresContext) {
|
|
EnsureDocument(mPresContext);
|
|
}
|
|
bool isChromeDoc = nsContentUtils::IsChromeDoc(mDocument);
|
|
|
|
// the initial dataTransfer is the one from the dragstart event that
|
|
// was set on the dragSession when the drag began.
|
|
RefPtr<DataTransfer> dataTransfer;
|
|
RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
|
|
|
|
WidgetDragEvent* dragEvent = aEvent->AsDragEvent();
|
|
|
|
// 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.
|
|
uint32_t dropEffect = nsIDragService::DRAGDROP_ACTION_NONE;
|
|
uint32_t action = nsIDragService::DRAGDROP_ACTION_NONE;
|
|
if (nsEventStatus_eConsumeNoDefault == *aStatus) {
|
|
// If the event has initialized its mDataTransfer, use it.
|
|
// Or the event has not been initialized its mDataTransfer, but
|
|
// it's set before dispatch because of synthesized, but without
|
|
// testing session (e.g., emulating drag from another app), use it
|
|
// coming from outside.
|
|
// XXX Perhaps, for the latter case, we need new API because we don't
|
|
// have a chance to initialize allowed effects of the session.
|
|
if (dragEvent->mDataTransfer) {
|
|
// get the dataTransfer and the dropEffect that was set on it
|
|
dataTransfer = dragEvent->mDataTransfer;
|
|
dropEffect = dataTransfer->DropEffectInt();
|
|
} else {
|
|
// if dragEvent->mDataTransfer 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 DragEvent::GetDataTransfer),
|
|
// so set it from the drag action. We'll still want to filter it
|
|
// based on the effectAllowed below.
|
|
dataTransfer = initialDataTransfer;
|
|
|
|
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.
|
|
uint32_t effectAllowed = nsIDragService::DRAGDROP_ACTION_UNINITIALIZED;
|
|
if (dataTransfer) {
|
|
effectAllowed = dataTransfer->EffectAllowedInt();
|
|
}
|
|
|
|
// 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.
|
|
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->mMessage == eDragOver && !isChromeDoc) {
|
|
// Someone has called preventDefault(), check whether is was on
|
|
// content or chrome.
|
|
dragSession->SetOnlyChromeDrop(
|
|
!dragEvent->mDefaultPreventedOnContent);
|
|
}
|
|
} else if (aEvent->mMessage == eDragOver && !isChromeDoc) {
|
|
// No one called preventDefault(), so handle drop only in chrome.
|
|
dragSession->SetOnlyChromeDrop(true);
|
|
}
|
|
if (ContentChild* child = ContentChild::GetSingleton()) {
|
|
child->SendUpdateDropEffect(action, dropEffect);
|
|
}
|
|
if (aEvent->HasBeenPostedToRemoteProcess()) {
|
|
dragSession->SetCanDrop(true);
|
|
} else if (initialDataTransfer) {
|
|
// Now set the drop effect in the initial dataTransfer. This ensures
|
|
// that we can get the desired drop effect in the drop event. For events
|
|
// dispatched to content, the content process will take care of setting
|
|
// this.
|
|
initialDataTransfer->SetDropEffectInt(dropEffect);
|
|
}
|
|
} break;
|
|
|
|
case eDrop: {
|
|
if (aEvent->mFlags.mIsSynthesizedForTests) {
|
|
if (nsCOMPtr<nsIDragSession> dragSession =
|
|
nsContentUtils::GetDragSession()) {
|
|
MOZ_ASSERT(dragSession->IsSynthesizedForTests());
|
|
RefPtr<Document> sourceDocument;
|
|
DebugOnly<nsresult> rvIgnored =
|
|
dragSession->GetSourceDocument(getter_AddRefs(sourceDocument));
|
|
NS_WARNING_ASSERTION(
|
|
NS_SUCCEEDED(rvIgnored),
|
|
"nsIDragSession::GetSourceDocument() failed, but ignored");
|
|
// If source document hasn't been initialized, i.e., dragstart was
|
|
// consumed by the test, the test needs to dispatch "dragend" event
|
|
// instead of the drag session. Therefore, it does not make sense
|
|
// to set drag end point in such case (you hit assersion if you do
|
|
// it).
|
|
if (sourceDocument) {
|
|
CSSIntPoint dropPointInScreen =
|
|
Event::GetScreenCoords(aPresContext, aEvent, aEvent->mRefPoint);
|
|
dragSession->SetDragEndPointForTests(dropPointInScreen.x,
|
|
dropPointInScreen.y);
|
|
}
|
|
}
|
|
}
|
|
sLastDragOverFrame = nullptr;
|
|
ClearGlobalActiveContent(this);
|
|
break;
|
|
}
|
|
case eDragExit:
|
|
// make sure to fire the enter and exit_synth events after the
|
|
// eDragExit event, otherwise we'll clean up too early
|
|
GenerateDragDropEnterExit(presContext, aEvent->AsDragEvent());
|
|
if (ContentChild* child = ContentChild::GetSingleton()) {
|
|
// SendUpdateDropEffect to prevent nsIDragService from waiting for
|
|
// response of forwarded dragexit event.
|
|
child->SendUpdateDropEffect(nsIDragService::DRAGDROP_ACTION_NONE,
|
|
nsIDragService::DRAGDROP_ACTION_NONE);
|
|
}
|
|
break;
|
|
|
|
case eKeyUp:
|
|
break;
|
|
|
|
case eKeyPress: {
|
|
WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
|
|
PostHandleKeyboardEvent(keyEvent, mCurrentTarget, *aStatus);
|
|
} break;
|
|
|
|
case eMouseEnterIntoWidget:
|
|
if (mCurrentTarget) {
|
|
nsCOMPtr<nsIContent> targetContent;
|
|
mCurrentTarget->GetContentForEvent(aEvent,
|
|
getter_AddRefs(targetContent));
|
|
SetContentState(targetContent, NS_EVENT_STATE_HOVER);
|
|
}
|
|
break;
|
|
|
|
#ifdef XP_MACOSX
|
|
case eMouseActivate:
|
|
if (mCurrentTarget) {
|
|
nsCOMPtr<nsIContent> targetContent;
|
|
mCurrentTarget->GetContentForEvent(aEvent,
|
|
getter_AddRefs(targetContent));
|
|
if (!NodeAllowsClickThrough(targetContent)) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Reset target frame to null to avoid mistargeting after reentrant event
|
|
mCurrentTarget = nullptr;
|
|
mCurrentTargetContent = nullptr;
|
|
|
|
return ret;
|
|
}
|
|
|
|
BrowserParent* EventStateManager::GetCrossProcessTarget() {
|
|
return IMEStateManager::GetActiveBrowserParent();
|
|
}
|
|
|
|
bool EventStateManager::IsTargetCrossProcess(WidgetGUIEvent* 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 false;
|
|
return IMEStateManager::GetActiveBrowserParent() != nullptr;
|
|
}
|
|
|
|
void EventStateManager::NotifyDestroyPresContext(nsPresContext* aPresContext) {
|
|
IMEStateManager::OnDestroyPresContext(aPresContext);
|
|
if (mHoverContent) {
|
|
// Bug 70855: Presentation is going away, possibly for a reframe.
|
|
// Reset the hover state so that if we're recreating the presentation,
|
|
// we won't have the old hover state still set in the new presentation,
|
|
// as if the new presentation is resized, a new element may be hovered.
|
|
SetContentState(nullptr, NS_EVENT_STATE_HOVER);
|
|
}
|
|
mPointersEnterLeaveHelper.Clear();
|
|
}
|
|
|
|
void EventStateManager::SetPresContext(nsPresContext* aPresContext) {
|
|
mPresContext = aPresContext;
|
|
}
|
|
|
|
void EventStateManager::ClearFrameRefs(nsIFrame* aFrame) {
|
|
if (aFrame && aFrame == mCurrentTarget) {
|
|
mCurrentTargetContent = aFrame->GetContent();
|
|
}
|
|
}
|
|
|
|
struct CursorImage {
|
|
gfx::IntPoint mHotspot;
|
|
nsCOMPtr<imgIContainer> mContainer;
|
|
bool mEarlierCursorLoading = false;
|
|
};
|
|
|
|
// Given the event that we're processing, and the computed cursor and hotspot,
|
|
// determine whether the custom CSS cursor should be blocked (that is, not
|
|
// honored).
|
|
//
|
|
// We will not honor it all of the following are true:
|
|
//
|
|
// * layout.cursor.block.enabled is true.
|
|
// * the size of the custom cursor is bigger than layout.cursor.block.max-size.
|
|
// * the bounds of the cursor would end up outside of the viewport of the
|
|
// top-level content document.
|
|
//
|
|
// This is done in order to prevent hijacking the cursor, see bug 1445844 and
|
|
// co.
|
|
static bool ShouldBlockCustomCursor(nsPresContext* aPresContext,
|
|
WidgetEvent* aEvent,
|
|
const CursorImage& aCursor) {
|
|
if (!StaticPrefs::layout_cursor_block_enabled()) {
|
|
return false;
|
|
}
|
|
|
|
int32_t width = 0;
|
|
int32_t height = 0;
|
|
aCursor.mContainer->GetWidth(&width);
|
|
aCursor.mContainer->GetHeight(&height);
|
|
|
|
int32_t maxSize = StaticPrefs::layout_cursor_block_max_size();
|
|
|
|
if (width <= maxSize && height <= maxSize) {
|
|
return false;
|
|
}
|
|
|
|
// We don't want to deal with iframes, just let them do their thing unless
|
|
// they intersect UI.
|
|
//
|
|
// TODO(emilio, bug 1525561): In a fission world, we should have a better way
|
|
// to find the event coordinates relative to the content area.
|
|
nsPresContext* topLevel =
|
|
aPresContext->GetInProcessRootContentDocumentPresContext();
|
|
if (!topLevel) {
|
|
return false;
|
|
}
|
|
|
|
nsPoint point = nsLayoutUtils::GetEventCoordinatesRelativeTo(
|
|
aEvent, RelativeTo{topLevel->PresShell()->GetRootFrame()});
|
|
|
|
nsSize size(CSSPixel::ToAppUnits(width), CSSPixel::ToAppUnits(height));
|
|
nsPoint hotspot(CSSPixel::ToAppUnits(aCursor.mHotspot.x),
|
|
CSSPixel::ToAppUnits(aCursor.mHotspot.y));
|
|
|
|
nsRect cursorRect(point - hotspot, size);
|
|
return !topLevel->GetVisibleArea().Contains(cursorRect);
|
|
}
|
|
|
|
static gfx::IntPoint ComputeHotspot(imgIContainer* aContainer,
|
|
const Maybe<gfx::Point>& aHotspot) {
|
|
MOZ_ASSERT(aContainer);
|
|
|
|
// css3-ui says to use the CSS-specified hotspot if present,
|
|
// otherwise use the intrinsic hotspot, otherwise use the top left
|
|
// corner.
|
|
if (aHotspot) {
|
|
int32_t imgWidth, imgHeight;
|
|
aContainer->GetWidth(&imgWidth);
|
|
aContainer->GetHeight(&imgHeight);
|
|
auto hotspot = gfx::IntPoint::Round(*aHotspot);
|
|
return {std::max(std::min(hotspot.x, imgWidth - 1), 0),
|
|
std::max(std::min(hotspot.y, imgHeight - 1), 0)};
|
|
}
|
|
|
|
gfx::IntPoint hotspot;
|
|
aContainer->GetHotspotX(&hotspot.x);
|
|
aContainer->GetHotspotY(&hotspot.y);
|
|
return hotspot;
|
|
}
|
|
|
|
static CursorImage ComputeCustomCursor(nsPresContext* aPresContext,
|
|
WidgetEvent* aEvent,
|
|
const nsIFrame& aFrame,
|
|
const nsIFrame::Cursor& aCursor) {
|
|
if (aCursor.mAllowCustomCursor == nsIFrame::AllowCustomCursorImage::No) {
|
|
return {};
|
|
}
|
|
const ComputedStyle& style =
|
|
aCursor.mStyle ? *aCursor.mStyle : *aFrame.Style();
|
|
|
|
// If we are falling back because any cursor before us is loading, let the
|
|
// consumer know.
|
|
bool loading = false;
|
|
for (const auto& image : style.StyleUI()->mCursor.images.AsSpan()) {
|
|
uint32_t status;
|
|
imgRequestProxy* req = image.url.GetImage();
|
|
if (!req || NS_FAILED(req->GetImageStatus(&status))) {
|
|
continue;
|
|
}
|
|
if (!(status & imgIRequest::STATUS_LOAD_COMPLETE)) {
|
|
loading = true;
|
|
continue;
|
|
}
|
|
if (status & imgIRequest::STATUS_ERROR) {
|
|
continue;
|
|
}
|
|
nsCOMPtr<imgIContainer> container;
|
|
req->GetImage(getter_AddRefs(container));
|
|
if (!container) {
|
|
continue;
|
|
}
|
|
container = nsLayoutUtils::OrientImage(
|
|
container, aFrame.StyleVisibility()->mImageOrientation);
|
|
Maybe<gfx::Point> specifiedHotspot =
|
|
image.has_hotspot ? Some(gfx::Point{image.hotspot_x, image.hotspot_y})
|
|
: Nothing();
|
|
gfx::IntPoint hotspot = ComputeHotspot(container, specifiedHotspot);
|
|
CursorImage result{hotspot, std::move(container), loading};
|
|
if (ShouldBlockCustomCursor(aPresContext, aEvent, result)) {
|
|
continue;
|
|
}
|
|
// This is the one we want!
|
|
return result;
|
|
}
|
|
return {{}, nullptr, loading};
|
|
}
|
|
|
|
void EventStateManager::UpdateCursor(nsPresContext* aPresContext,
|
|
WidgetEvent* aEvent,
|
|
nsIFrame* aTargetFrame,
|
|
nsEventStatus* aStatus) {
|
|
if (aTargetFrame && IsRemoteTarget(aTargetFrame->GetContent())) {
|
|
return;
|
|
}
|
|
|
|
auto cursor = StyleCursorKind::Default;
|
|
nsCOMPtr<imgIContainer> container;
|
|
Maybe<gfx::IntPoint> hotspot;
|
|
|
|
// If cursor is locked just use the locked one
|
|
if (mLockCursor != kInvalidCursorKind) {
|
|
cursor = mLockCursor;
|
|
}
|
|
// If not locked, look for correct cursor
|
|
else if (aTargetFrame) {
|
|
nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(
|
|
aEvent, RelativeTo{aTargetFrame});
|
|
Maybe<nsIFrame::Cursor> framecursor = aTargetFrame->GetCursor(pt);
|
|
// Avoid setting cursor when the mouse is over a windowless plugin.
|
|
if (!framecursor) {
|
|
if (XRE_IsContentProcess()) {
|
|
mLastFrameConsumedSetCursor = true;
|
|
}
|
|
return;
|
|
}
|
|
// Make sure cursors get reset after the mouse leaves a
|
|
// windowless plugin frame.
|
|
if (mLastFrameConsumedSetCursor) {
|
|
ClearCachedWidgetCursor(aTargetFrame);
|
|
mLastFrameConsumedSetCursor = false;
|
|
}
|
|
|
|
CursorImage customCursor =
|
|
ComputeCustomCursor(aPresContext, aEvent, *aTargetFrame, *framecursor);
|
|
|
|
// If the current cursor is from the same frame, and it is now
|
|
// loading some new image for the cursor, we should wait for a
|
|
// while rather than taking its fallback cursor directly.
|
|
if (customCursor.mEarlierCursorLoading &&
|
|
gLastCursorSourceFrame == aTargetFrame &&
|
|
TimeStamp::NowLoRes() - gLastCursorUpdateTime <
|
|
TimeDuration::FromMilliseconds(kCursorLoadingTimeout)) {
|
|
return;
|
|
}
|
|
cursor = framecursor->mCursor;
|
|
container = std::move(customCursor.mContainer);
|
|
hotspot = Some(customCursor.mHotspot);
|
|
}
|
|
|
|
if (StaticPrefs::ui_use_activity_cursor()) {
|
|
// Check whether or not to show the busy cursor
|
|
nsCOMPtr<nsIDocShell> docShell(aPresContext->GetDocShell());
|
|
if (!docShell) return;
|
|
auto busyFlags = docShell->GetBusyFlags();
|
|
|
|
// Show busy cursor everywhere before page loads
|
|
// and just replace the arrow cursor after page starts loading
|
|
if (busyFlags & nsIDocShell::BUSY_FLAGS_BUSY &&
|
|
(cursor == StyleCursorKind::Auto ||
|
|
cursor == StyleCursorKind::Default)) {
|
|
cursor = StyleCursorKind::Progress;
|
|
container = nullptr;
|
|
}
|
|
}
|
|
|
|
if (aTargetFrame) {
|
|
SetCursor(cursor, container, hotspot, aTargetFrame->GetNearestWidget(),
|
|
false);
|
|
gLastCursorSourceFrame = aTargetFrame;
|
|
gLastCursorUpdateTime = TimeStamp::NowLoRes();
|
|
}
|
|
|
|
if (mLockCursor != kInvalidCursorKind || StyleCursorKind::Auto != cursor) {
|
|
*aStatus = nsEventStatus_eConsumeDoDefault;
|
|
}
|
|
}
|
|
|
|
void EventStateManager::ClearCachedWidgetCursor(nsIFrame* aTargetFrame) {
|
|
if (!aTargetFrame) {
|
|
return;
|
|
}
|
|
nsIWidget* aWidget = aTargetFrame->GetNearestWidget();
|
|
if (!aWidget) {
|
|
return;
|
|
}
|
|
aWidget->ClearCachedCursor();
|
|
}
|
|
|
|
nsresult EventStateManager::SetCursor(StyleCursorKind aCursor,
|
|
imgIContainer* aContainer,
|
|
const Maybe<gfx::IntPoint>& aHotspot,
|
|
nsIWidget* aWidget, bool aLockCursor) {
|
|
EnsureDocument(mPresContext);
|
|
NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);
|
|
sMouseOverDocument = mDocument.get();
|
|
|
|
NS_ENSURE_TRUE(aWidget, NS_ERROR_FAILURE);
|
|
if (aLockCursor) {
|
|
if (StyleCursorKind::Auto != aCursor) {
|
|
mLockCursor = aCursor;
|
|
} else {
|
|
// If cursor style is set to auto we unlock the cursor again.
|
|
mLockCursor = kInvalidCursorKind;
|
|
}
|
|
}
|
|
nsCursor c;
|
|
switch (aCursor) {
|
|
case StyleCursorKind::Auto:
|
|
case StyleCursorKind::Default:
|
|
c = eCursor_standard;
|
|
break;
|
|
case StyleCursorKind::Pointer:
|
|
c = eCursor_hyperlink;
|
|
break;
|
|
case StyleCursorKind::Crosshair:
|
|
c = eCursor_crosshair;
|
|
break;
|
|
case StyleCursorKind::Move:
|
|
c = eCursor_move;
|
|
break;
|
|
case StyleCursorKind::Text:
|
|
c = eCursor_select;
|
|
break;
|
|
case StyleCursorKind::Wait:
|
|
c = eCursor_wait;
|
|
break;
|
|
case StyleCursorKind::Help:
|
|
c = eCursor_help;
|
|
break;
|
|
case StyleCursorKind::NResize:
|
|
c = eCursor_n_resize;
|
|
break;
|
|
case StyleCursorKind::SResize:
|
|
c = eCursor_s_resize;
|
|
break;
|
|
case StyleCursorKind::WResize:
|
|
c = eCursor_w_resize;
|
|
break;
|
|
case StyleCursorKind::EResize:
|
|
c = eCursor_e_resize;
|
|
break;
|
|
case StyleCursorKind::NwResize:
|
|
c = eCursor_nw_resize;
|
|
break;
|
|
case StyleCursorKind::SeResize:
|
|
c = eCursor_se_resize;
|
|
break;
|
|
case StyleCursorKind::NeResize:
|
|
c = eCursor_ne_resize;
|
|
break;
|
|
case StyleCursorKind::SwResize:
|
|
c = eCursor_sw_resize;
|
|
break;
|
|
case StyleCursorKind::Copy: // CSS3
|
|
c = eCursor_copy;
|
|
break;
|
|
case StyleCursorKind::Alias:
|
|
c = eCursor_alias;
|
|
break;
|
|
case StyleCursorKind::ContextMenu:
|
|
c = eCursor_context_menu;
|
|
break;
|
|
case StyleCursorKind::Cell:
|
|
c = eCursor_cell;
|
|
break;
|
|
case StyleCursorKind::Grab:
|
|
c = eCursor_grab;
|
|
break;
|
|
case StyleCursorKind::Grabbing:
|
|
c = eCursor_grabbing;
|
|
break;
|
|
case StyleCursorKind::Progress:
|
|
c = eCursor_spinning;
|
|
break;
|
|
case StyleCursorKind::ZoomIn:
|
|
c = eCursor_zoom_in;
|
|
break;
|
|
case StyleCursorKind::ZoomOut:
|
|
c = eCursor_zoom_out;
|
|
break;
|
|
case StyleCursorKind::NotAllowed:
|
|
c = eCursor_not_allowed;
|
|
break;
|
|
case StyleCursorKind::ColResize:
|
|
c = eCursor_col_resize;
|
|
break;
|
|
case StyleCursorKind::RowResize:
|
|
c = eCursor_row_resize;
|
|
break;
|
|
case StyleCursorKind::NoDrop:
|
|
c = eCursor_no_drop;
|
|
break;
|
|
case StyleCursorKind::VerticalText:
|
|
c = eCursor_vertical_text;
|
|
break;
|
|
case StyleCursorKind::AllScroll:
|
|
c = eCursor_all_scroll;
|
|
break;
|
|
case StyleCursorKind::NeswResize:
|
|
c = eCursor_nesw_resize;
|
|
break;
|
|
case StyleCursorKind::NwseResize:
|
|
c = eCursor_nwse_resize;
|
|
break;
|
|
case StyleCursorKind::NsResize:
|
|
c = eCursor_ns_resize;
|
|
break;
|
|
case StyleCursorKind::EwResize:
|
|
c = eCursor_ew_resize;
|
|
break;
|
|
case StyleCursorKind::None:
|
|
c = eCursor_none;
|
|
break;
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("Unknown cursor kind");
|
|
c = eCursor_standard;
|
|
break;
|
|
}
|
|
|
|
int32_t x = aHotspot ? aHotspot->x : 0;
|
|
int32_t y = aHotspot ? aHotspot->y : 0;
|
|
aWidget->SetCursor(c, aContainer, x, y);
|
|
return NS_OK;
|
|
}
|
|
|
|
class MOZ_STACK_CLASS ESMEventCB : public EventDispatchingCallback {
|
|
public:
|
|
explicit ESMEventCB(nsIContent* aTarget) : mTarget(aTarget) {}
|
|
|
|
MOZ_CAN_RUN_SCRIPT
|
|
void HandleEvent(EventChainPostVisitor& aVisitor) override {
|
|
if (aVisitor.mPresContext) {
|
|
nsIFrame* frame = aVisitor.mPresContext->GetPrimaryFrameFor(mTarget);
|
|
if (frame) {
|
|
frame->HandleEvent(MOZ_KnownLive(aVisitor.mPresContext),
|
|
aVisitor.mEvent->AsGUIEvent(),
|
|
&aVisitor.mEventStatus);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> mTarget;
|
|
};
|
|
|
|
static UniquePtr<WidgetMouseEvent> CreateMouseOrPointerWidgetEvent(
|
|
WidgetMouseEvent* aMouseEvent, EventMessage aMessage,
|
|
EventTarget* aRelatedTarget) {
|
|
WidgetPointerEvent* sourcePointer = aMouseEvent->AsPointerEvent();
|
|
UniquePtr<WidgetMouseEvent> newEvent;
|
|
if (sourcePointer) {
|
|
AUTO_PROFILER_LABEL("CreateMouseOrPointerWidgetEvent", OTHER);
|
|
|
|
WidgetPointerEvent* newPointerEvent = new WidgetPointerEvent(
|
|
aMouseEvent->IsTrusted(), aMessage, aMouseEvent->mWidget);
|
|
newPointerEvent->mIsPrimary = sourcePointer->mIsPrimary;
|
|
newPointerEvent->mWidth = sourcePointer->mWidth;
|
|
newPointerEvent->mHeight = sourcePointer->mHeight;
|
|
newPointerEvent->mInputSource = sourcePointer->mInputSource;
|
|
|
|
newEvent = WrapUnique(newPointerEvent);
|
|
} else {
|
|
newEvent = MakeUnique<WidgetMouseEvent>(aMouseEvent->IsTrusted(), aMessage,
|
|
aMouseEvent->mWidget,
|
|
WidgetMouseEvent::eReal);
|
|
}
|
|
newEvent->mRelatedTarget = aRelatedTarget;
|
|
newEvent->mRefPoint = aMouseEvent->mRefPoint;
|
|
newEvent->mModifiers = aMouseEvent->mModifiers;
|
|
newEvent->mButton = aMouseEvent->mButton;
|
|
newEvent->mButtons = aMouseEvent->mButtons;
|
|
newEvent->mPressure = aMouseEvent->mPressure;
|
|
newEvent->mPluginEvent = aMouseEvent->mPluginEvent;
|
|
newEvent->mInputSource = aMouseEvent->mInputSource;
|
|
newEvent->pointerId = aMouseEvent->pointerId;
|
|
|
|
return newEvent;
|
|
}
|
|
|
|
nsIFrame* EventStateManager::DispatchMouseOrPointerEvent(
|
|
WidgetMouseEvent* aMouseEvent, EventMessage aMessage,
|
|
nsIContent* aTargetContent, nsIContent* aRelatedContent) {
|
|
// http://dvcs.w3.org/hg/webevents/raw-file/default/mouse-lock.html#methods
|
|
// "[When the mouse is locked on an element...e]vents that require the concept
|
|
// of a mouse cursor must not be dispatched (for example: mouseover,
|
|
// mouseout).
|
|
if (sIsPointerLocked && (aMessage == eMouseLeave || aMessage == eMouseEnter ||
|
|
aMessage == eMouseOver || aMessage == eMouseOut)) {
|
|
mCurrentTargetContent = nullptr;
|
|
nsCOMPtr<Element> pointerLockedElement =
|
|
do_QueryReferent(EventStateManager::sPointerLockedElement);
|
|
if (!pointerLockedElement) {
|
|
NS_WARNING("Should have pointer locked element, but didn't.");
|
|
return nullptr;
|
|
}
|
|
return mPresContext->GetPrimaryFrameFor(pointerLockedElement);
|
|
}
|
|
|
|
mCurrentTargetContent = nullptr;
|
|
|
|
if (!aTargetContent) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> targetContent = aTargetContent;
|
|
nsCOMPtr<nsIContent> relatedContent = aRelatedContent;
|
|
|
|
UniquePtr<WidgetMouseEvent> dispatchEvent =
|
|
CreateMouseOrPointerWidgetEvent(aMouseEvent, aMessage, relatedContent);
|
|
|
|
AutoWeakFrame previousTarget = mCurrentTarget;
|
|
mCurrentTargetContent = targetContent;
|
|
|
|
nsIFrame* targetFrame = nullptr;
|
|
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
ESMEventCB callback(targetContent);
|
|
EventDispatcher::Dispatch(targetContent, mPresContext, dispatchEvent.get(),
|
|
nullptr, &status, &callback);
|
|
|
|
if (mPresContext) {
|
|
// Although the primary frame was checked in event callback, it may not be
|
|
// the same object after event dispatch and handling, so refetch it.
|
|
targetFrame = mPresContext->GetPrimaryFrameFor(targetContent);
|
|
|
|
// If we are entering/leaving remote content, dispatch a mouse enter/exit
|
|
// event to the remote frame.
|
|
if (IsTopLevelRemoteTarget(targetContent)) {
|
|
if (aMessage == eMouseOut) {
|
|
// For remote content, send a puppet widget mouse exit event.
|
|
UniquePtr<WidgetMouseEvent> remoteEvent =
|
|
CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseExitFromWidget,
|
|
relatedContent);
|
|
remoteEvent->mExitFrom = Some(WidgetMouseEvent::ePuppet);
|
|
|
|
// mCurrentTarget is set to the new target, so we must reset it to the
|
|
// old target and then dispatch a cross-process event. (mCurrentTarget
|
|
// will be set back below.) HandleCrossProcessEvent will query for the
|
|
// proper target via GetEventTarget which will return mCurrentTarget.
|
|
mCurrentTarget = targetFrame;
|
|
HandleCrossProcessEvent(remoteEvent.get(), &status);
|
|
} else if (aMessage == eMouseOver) {
|
|
UniquePtr<WidgetMouseEvent> remoteEvent =
|
|
CreateMouseOrPointerWidgetEvent(aMouseEvent, eMouseEnterIntoWidget,
|
|
relatedContent);
|
|
HandleCrossProcessEvent(remoteEvent.get(), &status);
|
|
}
|
|
}
|
|
}
|
|
|
|
mCurrentTargetContent = nullptr;
|
|
mCurrentTarget = previousTarget;
|
|
|
|
return targetFrame;
|
|
}
|
|
|
|
static nsIContent* FindCommonAncestor(nsIContent* aNode1, nsIContent* aNode2) {
|
|
if (!aNode1 || !aNode2) {
|
|
return nullptr;
|
|
}
|
|
return nsContentUtils::GetCommonFlattenedTreeAncestor(aNode1, aNode2);
|
|
}
|
|
|
|
class EnterLeaveDispatcher {
|
|
public:
|
|
EnterLeaveDispatcher(EventStateManager* aESM, nsIContent* aTarget,
|
|
nsIContent* aRelatedTarget,
|
|
WidgetMouseEvent* aMouseEvent,
|
|
EventMessage aEventMessage)
|
|
: mESM(aESM), mMouseEvent(aMouseEvent), mEventMessage(aEventMessage) {
|
|
nsPIDOMWindowInner* win =
|
|
aTarget ? aTarget->OwnerDoc()->GetInnerWindow() : nullptr;
|
|
if (aMouseEvent->AsPointerEvent()
|
|
? win && win->HasPointerEnterLeaveEventListeners()
|
|
: win && win->HasMouseEnterLeaveEventListeners()) {
|
|
mRelatedTarget =
|
|
aRelatedTarget ? aRelatedTarget->FindFirstNonChromeOnlyAccessContent()
|
|
: nullptr;
|
|
nsINode* commonParent = FindCommonAncestor(aTarget, aRelatedTarget);
|
|
nsIContent* current = aTarget;
|
|
// Note, it is ok if commonParent is null!
|
|
while (current && current != commonParent) {
|
|
if (!current->ChromeOnlyAccess()) {
|
|
mTargets.AppendObject(current);
|
|
}
|
|
// mouseenter/leave is fired only on elements.
|
|
current = current->GetFlattenedTreeParent();
|
|
}
|
|
}
|
|
}
|
|
|
|
void Dispatch() {
|
|
if (mEventMessage == eMouseEnter || mEventMessage == ePointerEnter) {
|
|
for (int32_t i = mTargets.Count() - 1; i >= 0; --i) {
|
|
mESM->DispatchMouseOrPointerEvent(mMouseEvent, mEventMessage,
|
|
mTargets[i], mRelatedTarget);
|
|
}
|
|
} else {
|
|
for (int32_t i = 0; i < mTargets.Count(); ++i) {
|
|
mESM->DispatchMouseOrPointerEvent(mMouseEvent, mEventMessage,
|
|
mTargets[i], mRelatedTarget);
|
|
}
|
|
}
|
|
}
|
|
|
|
EventStateManager* mESM;
|
|
nsCOMArray<nsIContent> mTargets;
|
|
nsCOMPtr<nsIContent> mRelatedTarget;
|
|
WidgetMouseEvent* mMouseEvent;
|
|
EventMessage mEventMessage;
|
|
};
|
|
|
|
void EventStateManager::NotifyMouseOut(WidgetMouseEvent* aMouseEvent,
|
|
nsIContent* aMovingInto) {
|
|
RefPtr<OverOutElementsWrapper> wrapper = GetWrapperByEventID(aMouseEvent);
|
|
|
|
if (!wrapper || !wrapper->mLastOverElement) return;
|
|
// Before firing mouseout, check for recursion
|
|
if (wrapper->mLastOverElement == wrapper->mFirstOutEventElement) return;
|
|
|
|
if (wrapper->mLastOverFrame) {
|
|
// if the frame is associated with a subdocument,
|
|
// tell the subdocument that we're moving out of it
|
|
nsSubDocumentFrame* subdocFrame =
|
|
do_QueryFrame(wrapper->mLastOverFrame.GetFrame());
|
|
if (subdocFrame) {
|
|
nsIDocShell* docshell = subdocFrame->GetDocShell();
|
|
if (docshell) {
|
|
RefPtr<nsPresContext> presContext = docshell->GetPresContext();
|
|
|
|
if (presContext) {
|
|
EventStateManager* kidESM = presContext->EventStateManager();
|
|
// Not moving into any element in this subdocument
|
|
kidESM->NotifyMouseOut(aMouseEvent, nullptr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// That could have caused DOM events which could wreak havoc. Reverify
|
|
// things and be careful.
|
|
if (!wrapper->mLastOverElement) return;
|
|
|
|
// Store the first mouseOut event we fire and don't refire mouseOut
|
|
// to that element while the first mouseOut is still ongoing.
|
|
wrapper->mFirstOutEventElement = wrapper->mLastOverElement;
|
|
|
|
// 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.
|
|
bool isPointer = aMouseEvent->mClass == ePointerEventClass;
|
|
if (!aMovingInto && !isPointer) {
|
|
// Unset :hover
|
|
SetContentState(nullptr, NS_EVENT_STATE_HOVER);
|
|
}
|
|
|
|
EnterLeaveDispatcher leaveDispatcher(this, wrapper->mLastOverElement,
|
|
aMovingInto, aMouseEvent,
|
|
isPointer ? ePointerLeave : eMouseLeave);
|
|
|
|
// Fire mouseout
|
|
DispatchMouseOrPointerEvent(aMouseEvent, isPointer ? ePointerOut : eMouseOut,
|
|
wrapper->mLastOverElement, aMovingInto);
|
|
leaveDispatcher.Dispatch();
|
|
|
|
wrapper->mLastOverFrame = nullptr;
|
|
wrapper->mLastOverElement = nullptr;
|
|
|
|
// Turn recursion protection back off
|
|
wrapper->mFirstOutEventElement = nullptr;
|
|
}
|
|
|
|
void EventStateManager::RecomputeMouseEnterStateForRemoteFrame(
|
|
Element& aElement) {
|
|
if (!mMouseEnterLeaveHelper ||
|
|
mMouseEnterLeaveHelper->mLastOverElement != &aElement) {
|
|
return;
|
|
}
|
|
|
|
if (BrowserParent* remote = BrowserParent::GetFrom(&aElement)) {
|
|
remote->MouseEnterIntoWidget();
|
|
}
|
|
}
|
|
|
|
void EventStateManager::NotifyMouseOver(WidgetMouseEvent* aMouseEvent,
|
|
nsIContent* aContent) {
|
|
NS_ASSERTION(aContent, "Mouse must be over something");
|
|
|
|
RefPtr<OverOutElementsWrapper> wrapper = GetWrapperByEventID(aMouseEvent);
|
|
|
|
if (!wrapper || wrapper->mLastOverElement == aContent) return;
|
|
|
|
// Before firing mouseover, check for recursion
|
|
if (aContent == wrapper->mFirstOverEventElement) 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);
|
|
if (Document* parentDoc = mDocument->GetInProcessParentDocument()) {
|
|
if (nsCOMPtr<nsIContent> docContent =
|
|
parentDoc->FindContentForSubDocument(mDocument)) {
|
|
if (PresShell* parentPresShell = parentDoc->GetPresShell()) {
|
|
RefPtr<EventStateManager> parentESM =
|
|
parentPresShell->GetPresContext()->EventStateManager();
|
|
parentESM->NotifyMouseOver(aMouseEvent, docContent);
|
|
}
|
|
}
|
|
}
|
|
// Firing the DOM event in the parent document could cause all kinds
|
|
// of havoc. Reverify and take care.
|
|
if (wrapper->mLastOverElement == aContent) return;
|
|
|
|
// Remember mLastOverElement as the related content for the
|
|
// DispatchMouseOrPointerEvent() call below, since NotifyMouseOut() resets it,
|
|
// bug 298477.
|
|
nsCOMPtr<nsIContent> lastOverElement = wrapper->mLastOverElement;
|
|
|
|
bool isPointer = aMouseEvent->mClass == ePointerEventClass;
|
|
|
|
EnterLeaveDispatcher enterDispatcher(this, aContent, lastOverElement,
|
|
aMouseEvent,
|
|
isPointer ? ePointerEnter : eMouseEnter);
|
|
|
|
if (!isPointer) {
|
|
SetContentState(aContent, NS_EVENT_STATE_HOVER);
|
|
}
|
|
|
|
NotifyMouseOut(aMouseEvent, aContent);
|
|
|
|
// Store the first mouseOver event we fire and don't refire mouseOver
|
|
// to that element while the first mouseOver is still ongoing.
|
|
wrapper->mFirstOverEventElement = aContent;
|
|
|
|
// Fire mouseover
|
|
wrapper->mLastOverFrame = DispatchMouseOrPointerEvent(
|
|
aMouseEvent, isPointer ? ePointerOver : eMouseOver, aContent,
|
|
lastOverElement);
|
|
enterDispatcher.Dispatch();
|
|
wrapper->mLastOverElement = aContent;
|
|
|
|
// Turn recursion protection back off
|
|
wrapper->mFirstOverEventElement = nullptr;
|
|
}
|
|
|
|
// Returns the center point of the window's client area. This is
|
|
// in widget coordinates, i.e. relative to the widget's top-left
|
|
// corner, not in screen coordinates, the same units that UIEvent::
|
|
// refpoint is in. It may not be the exact center of the window if
|
|
// the platform requires rounding the coordinate.
|
|
static LayoutDeviceIntPoint GetWindowClientRectCenter(nsIWidget* aWidget) {
|
|
NS_ENSURE_TRUE(aWidget, LayoutDeviceIntPoint(0, 0));
|
|
|
|
LayoutDeviceIntRect rect = aWidget->GetClientBounds();
|
|
LayoutDeviceIntPoint point(rect.x + rect.width / 2, rect.y + rect.height / 2);
|
|
int32_t round = aWidget->RoundsWidgetCoordinatesTo();
|
|
point.x = point.x / round * round;
|
|
point.y = point.y / round * round;
|
|
return point - aWidget->WidgetToScreenOffset();
|
|
}
|
|
|
|
void EventStateManager::GeneratePointerEnterExit(EventMessage aMessage,
|
|
WidgetMouseEvent* aEvent) {
|
|
if (!StaticPrefs::dom_w3c_pointer_events_enabled()) {
|
|
return;
|
|
}
|
|
WidgetPointerEvent pointerEvent(*aEvent);
|
|
pointerEvent.mMessage = aMessage;
|
|
GenerateMouseEnterExit(&pointerEvent);
|
|
}
|
|
|
|
/* static */
|
|
void EventStateManager::UpdateLastRefPointOfMouseEvent(
|
|
WidgetMouseEvent* aMouseEvent) {
|
|
if (aMouseEvent->mMessage != eMouseMove &&
|
|
aMouseEvent->mMessage != ePointerMove) {
|
|
return;
|
|
}
|
|
|
|
// Mouse movement is reported on the MouseEvent.movement{X,Y} fields.
|
|
// Movement is calculated in UIEvent::GetMovementPoint() as:
|
|
// previous_mousemove_mRefPoint - current_mousemove_mRefPoint.
|
|
if (sIsPointerLocked && aMouseEvent->mWidget) {
|
|
// The pointer is locked. If the pointer is not located at the center of
|
|
// the window, dispatch a synthetic mousemove to return the pointer there.
|
|
// Doing this between "real" pointer moves gives the impression that the
|
|
// (locked) pointer can continue moving and won't stop at the screen
|
|
// boundary. We cancel the synthetic event so that we don't end up
|
|
// dispatching the centering move event to content.
|
|
aMouseEvent->mLastRefPoint =
|
|
GetWindowClientRectCenter(aMouseEvent->mWidget);
|
|
|
|
} else if (sLastRefPoint == kInvalidRefPoint) {
|
|
// We don't have a valid previous mousemove mRefPoint. This is either
|
|
// the first move we've encountered, or the mouse has just re-entered
|
|
// the application window. We should report (0,0) movement for this
|
|
// case, so make the current and previous mRefPoints the same.
|
|
aMouseEvent->mLastRefPoint = aMouseEvent->mRefPoint;
|
|
} else {
|
|
aMouseEvent->mLastRefPoint = sLastRefPoint;
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void EventStateManager::ResetPointerToWindowCenterWhilePointerLocked(
|
|
WidgetMouseEvent* aMouseEvent) {
|
|
MOZ_ASSERT(sIsPointerLocked);
|
|
if ((aMouseEvent->mMessage != eMouseMove &&
|
|
aMouseEvent->mMessage != ePointerMove) ||
|
|
!aMouseEvent->mWidget) {
|
|
return;
|
|
}
|
|
|
|
// We generate pointermove from mousemove event, so only synthesize native
|
|
// mouse move and update sSynthCenteringPoint by mousemove event.
|
|
bool updateSynthCenteringPoint = aMouseEvent->mMessage == eMouseMove;
|
|
|
|
// The pointer is locked. If the pointer is not located at the center of
|
|
// the window, dispatch a synthetic mousemove to return the pointer there.
|
|
// Doing this between "real" pointer moves gives the impression that the
|
|
// (locked) pointer can continue moving and won't stop at the screen
|
|
// boundary. We cancel the synthetic event so that we don't end up
|
|
// dispatching the centering move event to content.
|
|
LayoutDeviceIntPoint center = GetWindowClientRectCenter(aMouseEvent->mWidget);
|
|
|
|
if (aMouseEvent->mRefPoint != center && updateSynthCenteringPoint) {
|
|
// Mouse move doesn't finish at the center of the window. Dispatch a
|
|
// synthetic native mouse event to move the pointer back to the center
|
|
// of the window, to faciliate more movement. But first, record that
|
|
// we've dispatched a synthetic mouse movement, so we can cancel it
|
|
// in the other branch here.
|
|
sSynthCenteringPoint = center;
|
|
aMouseEvent->mWidget->SynthesizeNativeMouseMove(
|
|
center + aMouseEvent->mWidget->WidgetToScreenOffset(), nullptr);
|
|
} else if (aMouseEvent->mRefPoint == sSynthCenteringPoint) {
|
|
// This is the "synthetic native" event we dispatched to re-center the
|
|
// pointer. Cancel it so we don't expose the centering move to content.
|
|
aMouseEvent->StopPropagation();
|
|
// Clear sSynthCenteringPoint so we don't cancel other events
|
|
// targeted at the center.
|
|
if (updateSynthCenteringPoint) {
|
|
sSynthCenteringPoint = kInvalidRefPoint;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void EventStateManager::UpdateLastPointerPosition(
|
|
WidgetMouseEvent* aMouseEvent) {
|
|
if (aMouseEvent->mMessage != eMouseMove) {
|
|
return;
|
|
}
|
|
sLastRefPoint = aMouseEvent->mRefPoint;
|
|
}
|
|
|
|
void EventStateManager::GenerateMouseEnterExit(WidgetMouseEvent* aMouseEvent) {
|
|
EnsureDocument(mPresContext);
|
|
if (!mDocument) return;
|
|
|
|
// Hold onto old target content through the event and reset after.
|
|
nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
|
|
|
|
switch (aMouseEvent->mMessage) {
|
|
case eMouseMove:
|
|
case ePointerMove:
|
|
case ePointerDown:
|
|
case ePointerGotCapture: {
|
|
// Get the target content target (mousemove target == mouseover target)
|
|
nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
|
|
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(aMouseEvent, targetElement);
|
|
}
|
|
} break;
|
|
case ePointerUp: {
|
|
// Get the target content target (mousemove target == mouseover target)
|
|
nsCOMPtr<nsIContent> targetElement = GetEventTargetContent(aMouseEvent);
|
|
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) {
|
|
RefPtr<OverOutElementsWrapper> helper =
|
|
GetWrapperByEventID(aMouseEvent);
|
|
if (helper) {
|
|
helper->mLastOverElement = targetElement;
|
|
}
|
|
NotifyMouseOut(aMouseEvent, nullptr);
|
|
}
|
|
} break;
|
|
case ePointerLeave:
|
|
case ePointerCancel:
|
|
case eMouseExitFromWidget: {
|
|
// This is actually the window mouse exit or pointer leave event. We're
|
|
// not moving into any new element.
|
|
|
|
RefPtr<OverOutElementsWrapper> helper = GetWrapperByEventID(aMouseEvent);
|
|
if (helper && helper->mLastOverFrame &&
|
|
nsContentUtils::GetTopLevelWidget(aMouseEvent->mWidget) !=
|
|
nsContentUtils::GetTopLevelWidget(
|
|
helper->mLastOverFrame->GetNearestWidget())) {
|
|
// the Mouse/PointerOut event widget doesn't have same top widget with
|
|
// mLastOverFrame, it's a spurious event for mLastOverFrame
|
|
break;
|
|
}
|
|
|
|
// Reset sLastRefPoint, so that we'll know not to report any
|
|
// movement the next time we re-enter the window.
|
|
sLastRefPoint = kInvalidRefPoint;
|
|
|
|
NotifyMouseOut(aMouseEvent, nullptr);
|
|
} break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// reset mCurretTargetContent to what it was
|
|
mCurrentTargetContent = targetBeforeEvent;
|
|
}
|
|
|
|
OverOutElementsWrapper* EventStateManager::GetWrapperByEventID(
|
|
WidgetMouseEvent* aEvent) {
|
|
WidgetPointerEvent* pointer = aEvent->AsPointerEvent();
|
|
if (!pointer) {
|
|
MOZ_ASSERT(aEvent->AsMouseEvent() != nullptr);
|
|
if (!mMouseEnterLeaveHelper) {
|
|
mMouseEnterLeaveHelper = new OverOutElementsWrapper();
|
|
}
|
|
return mMouseEnterLeaveHelper;
|
|
}
|
|
return mPointersEnterLeaveHelper.LookupForAdd(pointer->pointerId)
|
|
.OrInsert([]() { return new OverOutElementsWrapper(); });
|
|
}
|
|
|
|
/* static */
|
|
void EventStateManager::SetPointerLock(nsIWidget* aWidget,
|
|
nsIContent* aElement) {
|
|
// NOTE: aElement will be nullptr when unlocking.
|
|
sIsPointerLocked = !!aElement;
|
|
|
|
// Reset mouse wheel transaction
|
|
WheelTransaction::EndTransaction();
|
|
|
|
// Deal with DnD events
|
|
nsCOMPtr<nsIDragService> dragService =
|
|
do_GetService("@mozilla.org/widget/dragservice;1");
|
|
|
|
if (sIsPointerLocked) {
|
|
MOZ_ASSERT(aWidget, "Locking pointer requires a widget");
|
|
|
|
// Release all pointer capture when a pointer lock is successfully applied
|
|
// on an element.
|
|
PointerEventHandler::ReleaseAllPointerCapture();
|
|
|
|
// Store the last known ref point so we can reposition the pointer after
|
|
// unlock.
|
|
sPreLockPoint = sLastRefPoint;
|
|
|
|
// Fire a synthetic mouse move to ensure event state is updated. We first
|
|
// set the mouse to the center of the window, so that the mouse event
|
|
// doesn't report any movement.
|
|
sLastRefPoint = GetWindowClientRectCenter(aWidget);
|
|
aWidget->SynthesizeNativeMouseMove(
|
|
sLastRefPoint + aWidget->WidgetToScreenOffset(), nullptr);
|
|
|
|
// Suppress DnD
|
|
if (dragService) {
|
|
dragService->Suppress();
|
|
}
|
|
} else {
|
|
// Unlocking, so return pointer to the original position by firing a
|
|
// synthetic mouse event. We first reset sLastRefPoint to its
|
|
// pre-pointerlock position, so that the synthetic mouse event reports
|
|
// no movement.
|
|
sLastRefPoint = sPreLockPoint;
|
|
// Reset SynthCenteringPoint to invalid so that next time we start
|
|
// locking pointer, it has its initial value.
|
|
sSynthCenteringPoint = kInvalidRefPoint;
|
|
if (aWidget) {
|
|
aWidget->SynthesizeNativeMouseMove(
|
|
sPreLockPoint + aWidget->WidgetToScreenOffset(), nullptr);
|
|
}
|
|
|
|
// Unsuppress DnD
|
|
if (dragService) {
|
|
dragService->Unsuppress();
|
|
}
|
|
}
|
|
}
|
|
|
|
void EventStateManager::GenerateDragDropEnterExit(nsPresContext* aPresContext,
|
|
WidgetDragEvent* aDragEvent) {
|
|
// Hold onto old target content through the event and reset after.
|
|
nsCOMPtr<nsIContent> targetBeforeEvent = mCurrentTargetContent;
|
|
|
|
switch (aDragEvent->mMessage) {
|
|
case eDragOver: {
|
|
// when dragging from one frame to another, events are fired in the
|
|
// order: dragexit, dragenter, dragleave
|
|
if (sLastDragOverFrame != mCurrentTarget) {
|
|
// We'll need the content, too, to check if it changed separately from
|
|
// the frames.
|
|
nsCOMPtr<nsIContent> lastContent;
|
|
nsCOMPtr<nsIContent> targetContent;
|
|
mCurrentTarget->GetContentForEvent(aDragEvent,
|
|
getter_AddRefs(targetContent));
|
|
|
|
if (sLastDragOverFrame) {
|
|
// The frame has changed but the content may not have. Check before
|
|
// dispatching to content
|
|
sLastDragOverFrame->GetContentForEvent(aDragEvent,
|
|
getter_AddRefs(lastContent));
|
|
|
|
FireDragEnterOrExit(sLastDragOverFrame->PresContext(), aDragEvent,
|
|
eDragExit, targetContent, lastContent,
|
|
sLastDragOverFrame);
|
|
nsIContent* target = sLastDragOverFrame
|
|
? sLastDragOverFrame.GetFrame()->GetContent()
|
|
: nullptr;
|
|
// XXXedgar, look like we need to consider fission OOP iframe, too.
|
|
if (IsTopLevelRemoteTarget(target)) {
|
|
// Dragging something and moving from web content to chrome only
|
|
// fires dragexit and dragleave to xul:browser. We have to forward
|
|
// dragexit to sLastDragOverFrame when its content is a remote
|
|
// target. We don't forward dragleave since it's generated from
|
|
// dragexit.
|
|
WidgetDragEvent remoteEvent(aDragEvent->IsTrusted(), eDragExit,
|
|
aDragEvent->mWidget);
|
|
remoteEvent.AssignDragEventData(*aDragEvent, true);
|
|
remoteEvent.mFlags.mIsSynthesizedForTests =
|
|
aDragEvent->mFlags.mIsSynthesizedForTests;
|
|
nsEventStatus remoteStatus = nsEventStatus_eIgnore;
|
|
HandleCrossProcessEvent(&remoteEvent, &remoteStatus);
|
|
}
|
|
}
|
|
|
|
AutoWeakFrame currentTraget = mCurrentTarget;
|
|
FireDragEnterOrExit(aPresContext, aDragEvent, eDragEnter, lastContent,
|
|
targetContent, currentTraget);
|
|
|
|
if (sLastDragOverFrame) {
|
|
FireDragEnterOrExit(sLastDragOverFrame->PresContext(), aDragEvent,
|
|
eDragLeave, targetContent, lastContent,
|
|
sLastDragOverFrame);
|
|
}
|
|
|
|
sLastDragOverFrame = mCurrentTarget;
|
|
}
|
|
} break;
|
|
|
|
case eDragExit: {
|
|
// This is actually the window mouse exit event.
|
|
if (sLastDragOverFrame) {
|
|
nsCOMPtr<nsIContent> lastContent;
|
|
sLastDragOverFrame->GetContentForEvent(aDragEvent,
|
|
getter_AddRefs(lastContent));
|
|
|
|
RefPtr<nsPresContext> lastDragOverFramePresContext =
|
|
sLastDragOverFrame->PresContext();
|
|
FireDragEnterOrExit(lastDragOverFramePresContext, aDragEvent, eDragExit,
|
|
nullptr, lastContent, sLastDragOverFrame);
|
|
FireDragEnterOrExit(lastDragOverFramePresContext, aDragEvent,
|
|
eDragLeave, nullptr, lastContent,
|
|
sLastDragOverFrame);
|
|
|
|
sLastDragOverFrame = nullptr;
|
|
}
|
|
} break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// reset mCurretTargetContent to what it was
|
|
mCurrentTargetContent = targetBeforeEvent;
|
|
|
|
// Now flush all pending notifications, for better responsiveness.
|
|
FlushLayout(aPresContext);
|
|
}
|
|
|
|
void EventStateManager::FireDragEnterOrExit(nsPresContext* aPresContext,
|
|
WidgetDragEvent* aDragEvent,
|
|
EventMessage aMessage,
|
|
nsIContent* aRelatedTarget,
|
|
nsIContent* aTargetContent,
|
|
AutoWeakFrame& aTargetFrame) {
|
|
MOZ_ASSERT(aMessage == eDragLeave || aMessage == eDragExit ||
|
|
aMessage == eDragEnter);
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
WidgetDragEvent event(aDragEvent->IsTrusted(), aMessage, aDragEvent->mWidget);
|
|
event.AssignDragEventData(*aDragEvent, false);
|
|
event.mFlags.mIsSynthesizedForTests =
|
|
aDragEvent->mFlags.mIsSynthesizedForTests;
|
|
event.mRelatedTarget = aRelatedTarget;
|
|
mCurrentTargetContent = aTargetContent;
|
|
|
|
if (aTargetContent != aRelatedTarget) {
|
|
// XXX This event should still go somewhere!!
|
|
if (aTargetContent) {
|
|
EventDispatcher::Dispatch(aTargetContent, aPresContext, &event, nullptr,
|
|
&status);
|
|
}
|
|
|
|
// adjust the drag hover if the dragenter event was cancelled or this is a
|
|
// drag exit
|
|
if (status == nsEventStatus_eConsumeNoDefault || aMessage == eDragExit) {
|
|
SetContentState((aMessage == eDragEnter) ? aTargetContent : nullptr,
|
|
NS_EVENT_STATE_DRAGOVER);
|
|
}
|
|
|
|
// collect any changes to moz cursor settings stored in the event's
|
|
// data transfer.
|
|
UpdateDragDataTransfer(&event);
|
|
}
|
|
|
|
// Finally dispatch the event to the frame
|
|
if (aTargetFrame) {
|
|
aTargetFrame->HandleEvent(aPresContext, &event, &status);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::UpdateDragDataTransfer(WidgetDragEvent* dragEvent) {
|
|
NS_ASSERTION(dragEvent, "drag event is null in UpdateDragDataTransfer!");
|
|
if (!dragEvent->mDataTransfer) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIDragSession> 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.
|
|
RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
|
|
if (initialDataTransfer) {
|
|
// retrieve the current moz cursor setting and save it.
|
|
nsAutoString mozCursor;
|
|
dragEvent->mDataTransfer->GetMozCursor(mozCursor);
|
|
initialDataTransfer->SetMozCursor(mozCursor);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult EventStateManager::SetClickCount(WidgetMouseEvent* aEvent,
|
|
nsEventStatus* aStatus,
|
|
nsIContent* aOverrideClickTarget) {
|
|
nsCOMPtr<nsIContent> mouseContent = aOverrideClickTarget;
|
|
if (!mouseContent && mCurrentTarget) {
|
|
mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(mouseContent));
|
|
}
|
|
if (mouseContent && mouseContent->IsText()) {
|
|
nsINode* parent = mouseContent->GetFlattenedTreeParentNode();
|
|
if (parent && parent->IsContent()) {
|
|
mouseContent = parent->AsContent();
|
|
}
|
|
}
|
|
|
|
switch (aEvent->mButton) {
|
|
case MouseButton::ePrimary:
|
|
if (aEvent->mMessage == eMouseDown) {
|
|
mLastLeftMouseDownContent = mouseContent;
|
|
} else if (aEvent->mMessage == eMouseUp) {
|
|
aEvent->mClickTarget =
|
|
nsContentUtils::GetCommonAncestorUnderInteractiveContent(
|
|
mouseContent, mLastLeftMouseDownContent);
|
|
if (aEvent->mClickTarget) {
|
|
aEvent->mClickCount = mLClickCount;
|
|
mLClickCount = 0;
|
|
} else {
|
|
aEvent->mClickCount = 0;
|
|
}
|
|
mLastLeftMouseDownContent = nullptr;
|
|
}
|
|
break;
|
|
|
|
case MouseButton::eMiddle:
|
|
if (aEvent->mMessage == eMouseDown) {
|
|
mLastMiddleMouseDownContent = mouseContent;
|
|
} else if (aEvent->mMessage == eMouseUp) {
|
|
aEvent->mClickTarget =
|
|
nsContentUtils::GetCommonAncestorUnderInteractiveContent(
|
|
mouseContent, mLastMiddleMouseDownContent);
|
|
if (aEvent->mClickTarget) {
|
|
aEvent->mClickCount = mMClickCount;
|
|
mMClickCount = 0;
|
|
} else {
|
|
aEvent->mClickCount = 0;
|
|
}
|
|
mLastMiddleMouseDownContent = nullptr;
|
|
}
|
|
break;
|
|
|
|
case MouseButton::eSecondary:
|
|
if (aEvent->mMessage == eMouseDown) {
|
|
mLastRightMouseDownContent = mouseContent;
|
|
} else if (aEvent->mMessage == eMouseUp) {
|
|
aEvent->mClickTarget =
|
|
nsContentUtils::GetCommonAncestorUnderInteractiveContent(
|
|
mouseContent, mLastRightMouseDownContent);
|
|
if (aEvent->mClickTarget) {
|
|
aEvent->mClickCount = mRClickCount;
|
|
mRClickCount = 0;
|
|
} else {
|
|
aEvent->mClickCount = 0;
|
|
}
|
|
mLastRightMouseDownContent = nullptr;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// static
|
|
bool EventStateManager::EventCausesClickEvents(
|
|
const WidgetMouseEvent& aMouseEvent) {
|
|
if (NS_WARN_IF(aMouseEvent.mMessage != eMouseUp)) {
|
|
return false;
|
|
}
|
|
// If the mouseup event is synthesized event, we don't need to dispatch
|
|
// click events.
|
|
if (!aMouseEvent.IsReal()) {
|
|
return false;
|
|
}
|
|
// If mouse is still over same element, clickcount will be > 1.
|
|
// If it has moved it will be zero, so no click.
|
|
if (!aMouseEvent.mClickCount || !aMouseEvent.mClickTarget) {
|
|
return false;
|
|
}
|
|
// Check that the window isn't disabled before firing a click
|
|
// (see bug 366544).
|
|
return !(aMouseEvent.mWidget && !aMouseEvent.mWidget->IsEnabled());
|
|
}
|
|
|
|
nsresult EventStateManager::InitAndDispatchClickEvent(
|
|
WidgetMouseEvent* aMouseUpEvent, nsEventStatus* aStatus,
|
|
EventMessage aMessage, PresShell* aPresShell, nsIContent* aMouseUpContent,
|
|
AutoWeakFrame aCurrentTarget, bool aNoContentDispatch,
|
|
nsIContent* aOverrideClickTarget) {
|
|
MOZ_ASSERT(aMouseUpEvent);
|
|
MOZ_ASSERT(EventCausesClickEvents(*aMouseUpEvent));
|
|
MOZ_ASSERT(aMouseUpContent || aCurrentTarget || aOverrideClickTarget);
|
|
|
|
WidgetMouseEvent event(aMouseUpEvent->IsTrusted(), aMessage,
|
|
aMouseUpEvent->mWidget, WidgetMouseEvent::eReal);
|
|
|
|
event.mRefPoint = aMouseUpEvent->mRefPoint;
|
|
event.mClickCount = aMouseUpEvent->mClickCount;
|
|
event.mModifiers = aMouseUpEvent->mModifiers;
|
|
event.mButtons = aMouseUpEvent->mButtons;
|
|
event.mTime = aMouseUpEvent->mTime;
|
|
event.mTimeStamp = aMouseUpEvent->mTimeStamp;
|
|
event.mFlags.mOnlyChromeDispatch =
|
|
aNoContentDispatch && !aMouseUpEvent->mUseLegacyNonPrimaryDispatch;
|
|
event.mFlags.mNoContentDispatch = aNoContentDispatch;
|
|
event.mButton = aMouseUpEvent->mButton;
|
|
event.pointerId = aMouseUpEvent->pointerId;
|
|
event.mInputSource = aMouseUpEvent->mInputSource;
|
|
nsIContent* target = aMouseUpContent;
|
|
nsIFrame* targetFrame = aCurrentTarget;
|
|
if (aOverrideClickTarget) {
|
|
target = aOverrideClickTarget;
|
|
targetFrame = aOverrideClickTarget->GetPrimaryFrame();
|
|
}
|
|
|
|
if (!target->IsInComposedDoc()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Use local event status for each click event dispatching since it'll be
|
|
// cleared by EventStateManager::PreHandleEvent(). Therefore, dispatching
|
|
// an event means that previous event status will be ignored.
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
nsresult rv = aPresShell->HandleEventWithTarget(
|
|
&event, targetFrame, MOZ_KnownLive(target), &status);
|
|
|
|
// Copy mMultipleActionsPrevented flag from a click event to the mouseup
|
|
// event only when it's set to true. It may be set to true if an editor has
|
|
// already handled it. This is important to avoid two or more default
|
|
// actions handled here.
|
|
aMouseUpEvent->mFlags.mMultipleActionsPrevented |=
|
|
event.mFlags.mMultipleActionsPrevented;
|
|
// If current status is nsEventStatus_eConsumeNoDefault, we don't need to
|
|
// overwrite it.
|
|
if (*aStatus == nsEventStatus_eConsumeNoDefault) {
|
|
return rv;
|
|
}
|
|
// If new status is nsEventStatus_eConsumeNoDefault or
|
|
// nsEventStatus_eConsumeDoDefault, use it.
|
|
if (status == nsEventStatus_eConsumeNoDefault ||
|
|
status == nsEventStatus_eConsumeDoDefault) {
|
|
*aStatus = status;
|
|
return rv;
|
|
}
|
|
// Otherwise, keep the original status.
|
|
return rv;
|
|
}
|
|
|
|
nsresult EventStateManager::PostHandleMouseUp(
|
|
WidgetMouseEvent* aMouseUpEvent, nsEventStatus* aStatus,
|
|
nsIContent* aOverrideClickTarget) {
|
|
MOZ_ASSERT(aMouseUpEvent);
|
|
MOZ_ASSERT(EventCausesClickEvents(*aMouseUpEvent));
|
|
MOZ_ASSERT(aStatus);
|
|
|
|
RefPtr<PresShell> presShell = mPresContext->GetPresShell();
|
|
if (!presShell) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> clickTarget =
|
|
do_QueryInterface(aMouseUpEvent->mClickTarget);
|
|
NS_ENSURE_STATE(clickTarget);
|
|
|
|
// Fire click events if the event target is still available.
|
|
// Note that do not include the eMouseUp event's status since we ignore it
|
|
// for compatibility with the other browsers.
|
|
nsEventStatus status = nsEventStatus_eIgnore;
|
|
nsresult rv = DispatchClickEvents(presShell, aMouseUpEvent, &status,
|
|
clickTarget, aOverrideClickTarget);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
// Do not do anything if preceding click events are consumed.
|
|
// Note that Chromium dispatches "paste" event and actually pates clipboard
|
|
// text into focused editor even if the preceding click events are consumed.
|
|
// However, this is different from our traditional behavior and does not
|
|
// conform to DOM events. If we need to keep compatibility with Chromium,
|
|
// we should change it later.
|
|
if (status == nsEventStatus_eConsumeNoDefault) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Handle middle click paste if it's enabled and the mouse button is middle.
|
|
if (aMouseUpEvent->mButton != MouseButton::eMiddle ||
|
|
!WidgetMouseEvent::IsMiddleClickPasteEnabled()) {
|
|
return NS_OK;
|
|
}
|
|
DebugOnly<nsresult> rvIgnored =
|
|
HandleMiddleClickPaste(presShell, aMouseUpEvent, &status, nullptr);
|
|
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
|
|
"Failed to paste for a middle click");
|
|
|
|
// If new status is nsEventStatus_eConsumeNoDefault or
|
|
// nsEventStatus_eConsumeDoDefault, use it.
|
|
if (*aStatus != nsEventStatus_eConsumeNoDefault &&
|
|
(status == nsEventStatus_eConsumeNoDefault ||
|
|
status == nsEventStatus_eConsumeDoDefault)) {
|
|
*aStatus = status;
|
|
}
|
|
|
|
// Don't return error even if middle mouse paste fails since we haven't
|
|
// handled it here.
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult EventStateManager::DispatchClickEvents(
|
|
PresShell* aPresShell, WidgetMouseEvent* aMouseUpEvent,
|
|
nsEventStatus* aStatus, nsIContent* aClickTarget,
|
|
nsIContent* aOverrideClickTarget) {
|
|
MOZ_ASSERT(aPresShell);
|
|
MOZ_ASSERT(aMouseUpEvent);
|
|
MOZ_ASSERT(EventCausesClickEvents(*aMouseUpEvent));
|
|
MOZ_ASSERT(aStatus);
|
|
MOZ_ASSERT(aClickTarget || aOverrideClickTarget);
|
|
|
|
bool notDispatchToContents =
|
|
(aMouseUpEvent->mButton == MouseButton::eMiddle ||
|
|
aMouseUpEvent->mButton == MouseButton::eSecondary);
|
|
|
|
bool fireAuxClick = notDispatchToContents;
|
|
|
|
AutoWeakFrame currentTarget = aClickTarget->GetPrimaryFrame();
|
|
nsresult rv = InitAndDispatchClickEvent(
|
|
aMouseUpEvent, aStatus, eMouseClick, aPresShell, aClickTarget,
|
|
currentTarget, notDispatchToContents, aOverrideClickTarget);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
// Fire auxclick event if necessary.
|
|
if (fireAuxClick && *aStatus != nsEventStatus_eConsumeNoDefault &&
|
|
aClickTarget && aClickTarget->IsInComposedDoc()) {
|
|
rv = InitAndDispatchClickEvent(aMouseUpEvent, aStatus, eMouseAuxClick,
|
|
aPresShell, aClickTarget, currentTarget,
|
|
false, aOverrideClickTarget);
|
|
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to dispatch eMouseAuxClick");
|
|
}
|
|
|
|
// Fire double click event if click count is 2.
|
|
if (aMouseUpEvent->mClickCount == 2 && !fireAuxClick && aClickTarget &&
|
|
aClickTarget->IsInComposedDoc()) {
|
|
rv = InitAndDispatchClickEvent(aMouseUpEvent, aStatus, eMouseDoubleClick,
|
|
aPresShell, aClickTarget, currentTarget,
|
|
notDispatchToContents, aOverrideClickTarget);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult EventStateManager::HandleMiddleClickPaste(
|
|
PresShell* aPresShell, WidgetMouseEvent* aMouseEvent,
|
|
nsEventStatus* aStatus, TextEditor* aTextEditor) {
|
|
MOZ_ASSERT(aPresShell);
|
|
MOZ_ASSERT(aMouseEvent);
|
|
MOZ_ASSERT((aMouseEvent->mMessage == eMouseAuxClick &&
|
|
aMouseEvent->mButton == MouseButton::eMiddle) ||
|
|
EventCausesClickEvents(*aMouseEvent));
|
|
MOZ_ASSERT(aStatus);
|
|
MOZ_ASSERT(*aStatus != nsEventStatus_eConsumeNoDefault);
|
|
|
|
// Even if we're called twice or more for a mouse operation, we should
|
|
// handle only once. Although mMultipleActionsPrevented may be set to
|
|
// true by different event handler in the future, we can use it for now.
|
|
if (aMouseEvent->mFlags.mMultipleActionsPrevented) {
|
|
return NS_OK;
|
|
}
|
|
aMouseEvent->mFlags.mMultipleActionsPrevented = true;
|
|
|
|
RefPtr<Selection> selection;
|
|
if (aTextEditor) {
|
|
selection = aTextEditor->GetSelection();
|
|
if (NS_WARN_IF(!selection)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
} else {
|
|
Document* document = aPresShell->GetDocument();
|
|
if (NS_WARN_IF(!document)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
selection = nsCopySupport::GetSelectionForCopy(document);
|
|
if (NS_WARN_IF(!selection)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Move selection to the clicked point.
|
|
nsCOMPtr<nsIContent> container;
|
|
int32_t offset;
|
|
nsLayoutUtils::GetContainerAndOffsetAtEvent(
|
|
aPresShell, aMouseEvent, getter_AddRefs(container), &offset);
|
|
if (container) {
|
|
// XXX If readonly or disabled <input> or <textarea> in contenteditable
|
|
// designMode editor is clicked, the point is in the editor.
|
|
// However, outer HTMLEditor and Selection should handle it.
|
|
// So, in such case, Selection::Collapse() will fail.
|
|
DebugOnly<nsresult> rv = selection->CollapseInLimiter(container, offset);
|
|
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
|
|
"Failed to collapse Selection at middle clicked");
|
|
}
|
|
|
|
int32_t clipboardType = nsIClipboard::kGlobalClipboard;
|
|
nsresult rv = NS_OK;
|
|
nsCOMPtr<nsIClipboard> clipboardService =
|
|
do_GetService("@mozilla.org/widget/clipboard;1", &rv);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
bool selectionSupported;
|
|
rv = clipboardService->SupportsSelectionClipboard(&selectionSupported);
|
|
if (NS_SUCCEEDED(rv) && selectionSupported) {
|
|
clipboardType = nsIClipboard::kSelectionClipboard;
|
|
}
|
|
}
|
|
|
|
// Fire ePaste event by ourselves since we need to dispatch "paste" event
|
|
// even if the middle click event was consumed for compatibility with
|
|
// Chromium.
|
|
if (!nsCopySupport::FireClipboardEvent(ePaste, clipboardType, aPresShell,
|
|
selection)) {
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Although we've fired "paste" event, there is no editor to accept the
|
|
// clipboard content.
|
|
if (!aTextEditor) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Check if the editor is still the good target to paste.
|
|
if (aTextEditor->Destroyed() || aTextEditor->IsReadonly()) {
|
|
// XXX Should we consume the event when the editor is readonly and/or
|
|
// disabled?
|
|
return NS_OK;
|
|
}
|
|
|
|
// The selection may have been modified during reflow. Therefore, we
|
|
// should adjust event target to pass IsAcceptableInputEvent().
|
|
const nsRange* range = selection->GetRangeAt(0);
|
|
if (!range) {
|
|
return NS_OK;
|
|
}
|
|
WidgetMouseEvent mouseEvent(*aMouseEvent);
|
|
mouseEvent.mOriginalTarget = range->GetStartContainer();
|
|
if (NS_WARN_IF(!mouseEvent.mOriginalTarget) ||
|
|
!aTextEditor->IsAcceptableInputEvent(&mouseEvent)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// If Control key is pressed, we should paste clipboard content as
|
|
// quotation. Otherwise, paste it as is.
|
|
if (aMouseEvent->IsControl()) {
|
|
DebugOnly<nsresult> rv =
|
|
aTextEditor->PasteAsQuotationAsAction(clipboardType, false);
|
|
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to paste as quotation");
|
|
} else {
|
|
DebugOnly<nsresult> rv = aTextEditor->PasteAsAction(clipboardType, false);
|
|
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to paste");
|
|
}
|
|
*aStatus = nsEventStatus_eConsumeNoDefault;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame* EventStateManager::GetEventTarget() {
|
|
PresShell* presShell;
|
|
if (mCurrentTarget || !mPresContext ||
|
|
!(presShell = mPresContext->GetPresShell())) {
|
|
return mCurrentTarget;
|
|
}
|
|
|
|
if (mCurrentTargetContent) {
|
|
mCurrentTarget = mPresContext->GetPrimaryFrameFor(mCurrentTargetContent);
|
|
if (mCurrentTarget) {
|
|
return mCurrentTarget;
|
|
}
|
|
}
|
|
|
|
nsIFrame* frame = presShell->GetCurrentEventFrame();
|
|
return (mCurrentTarget = frame);
|
|
}
|
|
|
|
already_AddRefed<nsIContent> EventStateManager::GetEventTargetContent(
|
|
WidgetEvent* aEvent) {
|
|
if (aEvent && (aEvent->mMessage == eFocus || aEvent->mMessage == eBlur)) {
|
|
nsCOMPtr<nsIContent> content = GetFocusedContent();
|
|
return content.forget();
|
|
}
|
|
|
|
if (mCurrentTargetContent) {
|
|
nsCOMPtr<nsIContent> content = mCurrentTargetContent;
|
|
return content.forget();
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> content;
|
|
if (PresShell* presShell = mPresContext->GetPresShell()) {
|
|
content = presShell->GetEventTargetContent(aEvent);
|
|
}
|
|
|
|
// Some events here may set mCurrentTarget but not set the corresponding
|
|
// event target in the PresShell.
|
|
if (!content && mCurrentTarget) {
|
|
mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(content));
|
|
}
|
|
|
|
return content.forget();
|
|
}
|
|
|
|
static Element* GetLabelTarget(nsIContent* aPossibleLabel) {
|
|
mozilla::dom::HTMLLabelElement* label =
|
|
mozilla::dom::HTMLLabelElement::FromNode(aPossibleLabel);
|
|
if (!label) return nullptr;
|
|
|
|
return label->GetLabeledElement();
|
|
}
|
|
|
|
/* static */
|
|
void EventStateManager::SetFullscreenState(Element* aElement,
|
|
bool aIsFullscreen) {
|
|
DoStateChange(aElement, NS_EVENT_STATE_FULLSCREEN, aIsFullscreen);
|
|
}
|
|
|
|
/* static */
|
|
inline void EventStateManager::DoStateChange(Element* aElement,
|
|
EventStates aState,
|
|
bool aAddState) {
|
|
if (aAddState) {
|
|
aElement->AddStates(aState);
|
|
} else {
|
|
aElement->RemoveStates(aState);
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
inline void EventStateManager::DoStateChange(nsIContent* aContent,
|
|
EventStates aState,
|
|
bool aStateAdded) {
|
|
if (aContent->IsElement()) {
|
|
DoStateChange(aContent->AsElement(), aState, aStateAdded);
|
|
}
|
|
}
|
|
|
|
/* static */
|
|
void EventStateManager::UpdateAncestorState(nsIContent* aStartNode,
|
|
nsIContent* aStopBefore,
|
|
EventStates aState,
|
|
bool aAddState) {
|
|
for (; aStartNode && aStartNode != aStopBefore;
|
|
aStartNode = aStartNode->GetFlattenedTreeParent()) {
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
if (aAddState) {
|
|
// We might be in a situation where a node was in hover both
|
|
// because it was hovered and because the label for it was
|
|
// hovered, and while we stopped hovering the node the label is
|
|
// still hovered. Or we might have had two nested labels for the
|
|
// same node, and while one is no longer hovered the other still
|
|
// is. In that situation, the label that's still hovered will be
|
|
// aStopBefore or some ancestor of it, and the call we just made
|
|
// to UpdateAncestorState with aAddState = false would have
|
|
// removed the hover state from the node. But the node should
|
|
// still be in hover state. To handle this situation we need to
|
|
// keep walking up the tree and any time we find a label mark its
|
|
// corresponding node as still in our state.
|
|
for (; aStartNode; aStartNode = aStartNode->GetFlattenedTreeParent()) {
|
|
if (!aStartNode->IsElement()) {
|
|
continue;
|
|
}
|
|
|
|
Element* labelTarget = GetLabelTarget(aStartNode->AsElement());
|
|
if (labelTarget && !labelTarget->State().HasState(aState)) {
|
|
DoStateChange(labelTarget, aState, true);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool EventStateManager::SetContentState(nsIContent* aContent,
|
|
EventStates aState) {
|
|
MOZ_ASSERT(ManagesState(aState), "Unexpected state");
|
|
|
|
nsCOMPtr<nsIContent> notifyContent1;
|
|
nsCOMPtr<nsIContent> notifyContent2;
|
|
bool updateAncestors;
|
|
|
|
if (aState == NS_EVENT_STATE_HOVER || aState == NS_EVENT_STATE_ACTIVE) {
|
|
// Hover and active are hierarchical
|
|
updateAncestors = true;
|
|
|
|
// check to see that this state is allowed by style. Check dragover too?
|
|
// XXX Is this even what we want?
|
|
if (mCurrentTarget) {
|
|
const nsStyleUI* ui = mCurrentTarget->StyleUI();
|
|
if (ui->mUserInput == StyleUserInput::None) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (aState == NS_EVENT_STATE_ACTIVE) {
|
|
// Editable content can never become active since their default actions
|
|
// are disabled. Watch out for editable content in native anonymous
|
|
// subtrees though, as they belong to text controls.
|
|
if (aContent && aContent->IsEditable() &&
|
|
!aContent->IsInNativeAnonymousSubtree()) {
|
|
aContent = nullptr;
|
|
}
|
|
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->GetComposedDoc() ==
|
|
mPresContext->PresShell()->GetDocument(),
|
|
"Unexpected document");
|
|
nsIFrame* frame = aContent ? aContent->GetPrimaryFrame() : nullptr;
|
|
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 = nullptr;
|
|
}
|
|
}
|
|
|
|
if (newHover != mHoverContent) {
|
|
notifyContent1 = newHover;
|
|
notifyContent2 = mHoverContent;
|
|
mHoverContent = newHover;
|
|
}
|
|
}
|
|
} else {
|
|
updateAncestors = false;
|
|
if (aState == NS_EVENT_STATE_DRAGOVER) {
|
|
if (aContent != sDragOverContent) {
|
|
notifyContent1 = aContent;
|
|
notifyContent2 = sDragOverContent;
|
|
sDragOverContent = 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.
|
|
bool content1StateSet = true;
|
|
if (!notifyContent1) {
|
|
// This is ok because FindCommonAncestor wouldn't find anything
|
|
// anyway if notifyContent1 is null.
|
|
notifyContent1 = notifyContent2;
|
|
notifyContent2 = nullptr;
|
|
content1StateSet = false;
|
|
}
|
|
|
|
if (notifyContent1 && mPresContext) {
|
|
EnsureDocument(mPresContext);
|
|
if (mDocument) {
|
|
nsAutoScriptBlocker scriptBlocker;
|
|
|
|
if (updateAncestors) {
|
|
nsCOMPtr<nsIContent> 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, false);
|
|
}
|
|
UpdateAncestorState(notifyContent1, commonAncestor, aState,
|
|
content1StateSet);
|
|
} else {
|
|
if (notifyContent2) {
|
|
DoStateChange(notifyContent2, aState, false);
|
|
}
|
|
DoStateChange(notifyContent1, aState, content1StateSet);
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void EventStateManager::ResetLastOverForContent(
|
|
const uint32_t& aIdx, RefPtr<OverOutElementsWrapper>& aElemWrapper,
|
|
nsIContent* aContent) {
|
|
if (aElemWrapper && aElemWrapper->mLastOverElement &&
|
|
nsContentUtils::ContentIsFlattenedTreeDescendantOf(
|
|
aElemWrapper->mLastOverElement, aContent)) {
|
|
aElemWrapper->mLastOverElement = nullptr;
|
|
}
|
|
}
|
|
|
|
void EventStateManager::RemoveNodeFromChainIfNeeded(EventStates aState,
|
|
nsIContent* aContentRemoved,
|
|
bool aNotify) {
|
|
MOZ_ASSERT(aState == NS_EVENT_STATE_HOVER || aState == NS_EVENT_STATE_ACTIVE);
|
|
if (!aContentRemoved->IsElement() ||
|
|
!aContentRemoved->AsElement()->State().HasState(aState)) {
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent>& leaf =
|
|
aState == NS_EVENT_STATE_HOVER ? mHoverContent : mActiveContent;
|
|
|
|
MOZ_ASSERT(leaf);
|
|
// These two NS_ASSERTIONS below can fail for Shadow DOM sometimes, and it's
|
|
// not clear how to best handle it, see
|
|
// https://github.com/whatwg/html/issues/4795 and bug 1551621.
|
|
NS_ASSERTION(
|
|
nsContentUtils::ContentIsFlattenedTreeDescendantOf(leaf, aContentRemoved),
|
|
"Flat tree and active / hover chain got out of sync");
|
|
|
|
nsIContent* newLeaf = aContentRemoved->GetFlattenedTreeParent();
|
|
MOZ_ASSERT(!newLeaf || newLeaf->IsElement());
|
|
NS_ASSERTION(!newLeaf || newLeaf->AsElement()->State().HasState(aState),
|
|
"State got out of sync because of shadow DOM");
|
|
if (aNotify) {
|
|
SetContentState(newLeaf, aState);
|
|
} else {
|
|
// We don't update the removed content's state here, since removing NAC
|
|
// happens from layout and we don't really want to notify at that point or
|
|
// what not.
|
|
//
|
|
// Also, NAC is not observable and NAC being removed will go away soon.
|
|
leaf = newLeaf;
|
|
}
|
|
MOZ_ASSERT(leaf == newLeaf);
|
|
}
|
|
|
|
void EventStateManager::NativeAnonymousContentRemoved(nsIContent* aContent) {
|
|
MOZ_ASSERT(aContent->IsRootOfNativeAnonymousSubtree());
|
|
RemoveNodeFromChainIfNeeded(NS_EVENT_STATE_HOVER, aContent, false);
|
|
RemoveNodeFromChainIfNeeded(NS_EVENT_STATE_ACTIVE, aContent, false);
|
|
|
|
if (mLastLeftMouseDownContent &&
|
|
nsContentUtils::ContentIsFlattenedTreeDescendantOf(
|
|
mLastLeftMouseDownContent, aContent)) {
|
|
mLastLeftMouseDownContent = aContent->GetFlattenedTreeParent();
|
|
}
|
|
|
|
if (mLastMiddleMouseDownContent &&
|
|
nsContentUtils::ContentIsFlattenedTreeDescendantOf(
|
|
mLastMiddleMouseDownContent, aContent)) {
|
|
mLastMiddleMouseDownContent = aContent->GetFlattenedTreeParent();
|
|
}
|
|
|
|
if (mLastRightMouseDownContent &&
|
|
nsContentUtils::ContentIsFlattenedTreeDescendantOf(
|
|
mLastRightMouseDownContent, aContent)) {
|
|
mLastRightMouseDownContent = aContent->GetFlattenedTreeParent();
|
|
}
|
|
}
|
|
|
|
void EventStateManager::ContentRemoved(Document* aDocument,
|
|
nsIContent* aContent) {
|
|
/*
|
|
* Anchor and area elements when focused or hovered might make the UI to show
|
|
* the current link. We want to make sure that the UI gets informed when they
|
|
* are actually removed from the DOM.
|
|
*/
|
|
if (aContent->IsAnyOfHTMLElements(nsGkAtoms::a, nsGkAtoms::area) &&
|
|
(aContent->AsElement()->State().HasAtLeastOneOfStates(
|
|
NS_EVENT_STATE_FOCUS | NS_EVENT_STATE_HOVER))) {
|
|
nsGenericHTMLElement* element =
|
|
static_cast<nsGenericHTMLElement*>(aContent);
|
|
element->LeaveLink(
|
|
element->GetPresContext(nsGenericHTMLElement::eForComposedDoc));
|
|
}
|
|
|
|
IMEStateManager::OnRemoveContent(mPresContext, 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);
|
|
|
|
RemoveNodeFromChainIfNeeded(NS_EVENT_STATE_HOVER, aContent, true);
|
|
RemoveNodeFromChainIfNeeded(NS_EVENT_STATE_ACTIVE, aContent, true);
|
|
|
|
if (sDragOverContent &&
|
|
sDragOverContent->OwnerDoc() == aContent->OwnerDoc() &&
|
|
nsContentUtils::ContentIsFlattenedTreeDescendantOf(sDragOverContent,
|
|
aContent)) {
|
|
sDragOverContent = nullptr;
|
|
}
|
|
|
|
PointerEventHandler::ReleaseIfCaptureByDescendant(aContent);
|
|
|
|
// See bug 292146 for why we want to null this out
|
|
ResetLastOverForContent(0, mMouseEnterLeaveHelper, aContent);
|
|
for (auto iter = mPointersEnterLeaveHelper.Iter(); !iter.Done();
|
|
iter.Next()) {
|
|
ResetLastOverForContent(iter.Key(), iter.Data(), aContent);
|
|
}
|
|
}
|
|
|
|
bool EventStateManager::EventStatusOK(WidgetGUIEvent* aEvent) {
|
|
return !(aEvent->mMessage == eMouseDown &&
|
|
aEvent->AsMouseEvent()->mButton == MouseButton::ePrimary &&
|
|
!sNormalLMouseEventInProcess);
|
|
}
|
|
|
|
//-------------------------------------------
|
|
// Access Key Registration
|
|
//-------------------------------------------
|
|
void EventStateManager::RegisterAccessKey(Element* aElement, uint32_t aKey) {
|
|
if (aElement && mAccessKeys.IndexOf(aElement) == -1)
|
|
mAccessKeys.AppendObject(aElement);
|
|
}
|
|
|
|
void EventStateManager::UnregisterAccessKey(Element* aElement, uint32_t aKey) {
|
|
if (aElement) mAccessKeys.RemoveObject(aElement);
|
|
}
|
|
|
|
uint32_t EventStateManager::GetRegisteredAccessKey(Element* aElement) {
|
|
MOZ_ASSERT(aElement);
|
|
|
|
if (mAccessKeys.IndexOf(aElement) == -1) return 0;
|
|
|
|
nsAutoString accessKey;
|
|
aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey);
|
|
return accessKey.First();
|
|
}
|
|
|
|
void EventStateManager::EnsureDocument(nsPresContext* aPresContext) {
|
|
if (!mDocument) mDocument = aPresContext->Document();
|
|
}
|
|
|
|
void EventStateManager::FlushLayout(nsPresContext* aPresContext) {
|
|
MOZ_ASSERT(aPresContext, "nullptr ptr");
|
|
if (RefPtr<PresShell> presShell = aPresContext->GetPresShell()) {
|
|
presShell->FlushPendingNotifications(FlushType::InterruptibleLayout);
|
|
}
|
|
}
|
|
|
|
nsIContent* EventStateManager::GetFocusedContent() {
|
|
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
|
|
EnsureDocument(mPresContext);
|
|
if (!fm || !mDocument) return nullptr;
|
|
|
|
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
|
|
return nsFocusManager::GetFocusedDescendant(
|
|
mDocument->GetWindow(), nsFocusManager::eOnlyCurrentWindow,
|
|
getter_AddRefs(focusedWindow));
|
|
}
|
|
|
|
//-------------------------------------------------------
|
|
// Return true if the docshell is visible
|
|
|
|
bool EventStateManager::IsShellVisible(nsIDocShell* aShell) {
|
|
NS_ASSERTION(aShell, "docshell is null");
|
|
|
|
nsCOMPtr<nsIBaseWindow> basewin = do_QueryInterface(aShell);
|
|
if (!basewin) return true;
|
|
|
|
bool isVisible = 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 EventStateManager::DoContentCommandEvent(
|
|
WidgetContentCommandEvent* aEvent) {
|
|
EnsureDocument(mPresContext);
|
|
NS_ENSURE_TRUE(mDocument, NS_ERROR_FAILURE);
|
|
nsCOMPtr<nsPIDOMWindowOuter> window(mDocument->GetWindow());
|
|
NS_ENSURE_TRUE(window, NS_ERROR_FAILURE);
|
|
|
|
nsCOMPtr<nsPIWindowRoot> root = window->GetTopWindowRoot();
|
|
NS_ENSURE_TRUE(root, NS_ERROR_FAILURE);
|
|
const char* cmd;
|
|
switch (aEvent->mMessage) {
|
|
case eContentCommandCut:
|
|
cmd = "cmd_cut";
|
|
break;
|
|
case eContentCommandCopy:
|
|
cmd = "cmd_copy";
|
|
break;
|
|
case eContentCommandPaste:
|
|
cmd = "cmd_paste";
|
|
break;
|
|
case eContentCommandDelete:
|
|
cmd = "cmd_delete";
|
|
break;
|
|
case eContentCommandUndo:
|
|
cmd = "cmd_undo";
|
|
break;
|
|
case eContentCommandRedo:
|
|
cmd = "cmd_redo";
|
|
break;
|
|
case eContentCommandPasteTransferable:
|
|
cmd = "cmd_pasteTransferable";
|
|
break;
|
|
case eContentCommandLookUpDictionary:
|
|
cmd = "cmd_lookUpDictionary";
|
|
break;
|
|
default:
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
// If user tries to do something, user must try to do it in visible window.
|
|
// So, let's retrieve controller of visible window.
|
|
nsCOMPtr<nsIController> controller;
|
|
nsresult rv =
|
|
root->GetControllerForCommand(cmd, true, 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 = false;
|
|
} else {
|
|
bool canDoIt;
|
|
rv = controller->IsCommandEnabled(cmd, &canDoIt);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
aEvent->mIsEnabled = canDoIt;
|
|
if (canDoIt && !aEvent->mOnlyEnabledCheck) {
|
|
switch (aEvent->mMessage) {
|
|
case eContentCommandPasteTransferable: {
|
|
BrowserParent* remote = BrowserParent::GetFocused();
|
|
if (remote) {
|
|
nsCOMPtr<nsITransferable> transferable = aEvent->mTransferable;
|
|
IPCDataTransfer ipcDataTransfer;
|
|
nsContentUtils::TransferableToIPCTransferable(
|
|
transferable, &ipcDataTransfer, false, nullptr,
|
|
remote->Manager());
|
|
bool isPrivateData = transferable->GetIsPrivateData();
|
|
nsCOMPtr<nsIPrincipal> requestingPrincipal =
|
|
transferable->GetRequestingPrincipal();
|
|
nsContentPolicyType contentPolicyType =
|
|
transferable->GetContentPolicyType();
|
|
remote->SendPasteTransferable(ipcDataTransfer, isPrivateData,
|
|
requestingPrincipal,
|
|
contentPolicyType);
|
|
rv = NS_OK;
|
|
} else {
|
|
nsCOMPtr<nsICommandController> commandController =
|
|
do_QueryInterface(controller);
|
|
NS_ENSURE_STATE(commandController);
|
|
|
|
RefPtr<nsCommandParams> params = new nsCommandParams();
|
|
rv = params->SetISupports("transferable", aEvent->mTransferable);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
rv = commandController->DoCommandWithParams(cmd, params);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case eContentCommandLookUpDictionary: {
|
|
nsCOMPtr<nsICommandController> commandController =
|
|
do_QueryInterface(controller);
|
|
if (NS_WARN_IF(!commandController)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
RefPtr<nsCommandParams> params = new nsCommandParams();
|
|
rv = params->SetInt("x", aEvent->mRefPoint.x);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
rv = params->SetInt("y", aEvent->mRefPoint.y);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
rv = commandController->DoCommandWithParams(cmd, params);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
rv = controller->DoCommand(cmd);
|
|
break;
|
|
}
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
aEvent->mSucceeded = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult EventStateManager::DoContentCommandScrollEvent(
|
|
WidgetContentCommandEvent* aEvent) {
|
|
NS_ENSURE_TRUE(mPresContext, NS_ERROR_NOT_AVAILABLE);
|
|
PresShell* presShell = mPresContext->GetPresShell();
|
|
NS_ENSURE_TRUE(presShell, NS_ERROR_NOT_AVAILABLE);
|
|
NS_ENSURE_TRUE(aEvent->mScroll.mAmount != 0, NS_ERROR_INVALID_ARG);
|
|
|
|
ScrollUnit scrollUnit;
|
|
switch (aEvent->mScroll.mUnit) {
|
|
case WidgetContentCommandEvent::eCmdScrollUnit_Line:
|
|
scrollUnit = ScrollUnit::LINES;
|
|
break;
|
|
case WidgetContentCommandEvent::eCmdScrollUnit_Page:
|
|
scrollUnit = ScrollUnit::PAGES;
|
|
break;
|
|
case WidgetContentCommandEvent::eCmdScrollUnit_Whole:
|
|
scrollUnit = ScrollUnit::WHOLE;
|
|
break;
|
|
default:
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
aEvent->mSucceeded = true;
|
|
|
|
nsIScrollableFrame* sf =
|
|
presShell->GetScrollableFrameToScroll(ScrollableDirection::Either);
|
|
aEvent->mIsEnabled =
|
|
sf ? (aEvent->mScroll.mIsHorizontal ? WheelHandlingUtils::CanScrollOn(
|
|
sf, aEvent->mScroll.mAmount, 0)
|
|
: WheelHandlingUtils::CanScrollOn(
|
|
sf, 0, aEvent->mScroll.mAmount))
|
|
: 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, ScrollMode::Instant);
|
|
return NS_OK;
|
|
}
|
|
|
|
void EventStateManager::SetActiveManager(EventStateManager* aNewESM,
|
|
nsIContent* aContent) {
|
|
if (sActiveESM && aNewESM != sActiveESM) {
|
|
sActiveESM->SetContentState(nullptr, NS_EVENT_STATE_ACTIVE);
|
|
}
|
|
sActiveESM = aNewESM;
|
|
if (sActiveESM && aContent) {
|
|
sActiveESM->SetContentState(aContent, NS_EVENT_STATE_ACTIVE);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::ClearGlobalActiveContent(EventStateManager* aClearer) {
|
|
if (aClearer) {
|
|
aClearer->SetContentState(nullptr, NS_EVENT_STATE_ACTIVE);
|
|
if (sDragOverContent) {
|
|
aClearer->SetContentState(nullptr, NS_EVENT_STATE_DRAGOVER);
|
|
}
|
|
}
|
|
if (sActiveESM && aClearer != sActiveESM) {
|
|
sActiveESM->SetContentState(nullptr, NS_EVENT_STATE_ACTIVE);
|
|
}
|
|
sActiveESM = nullptr;
|
|
}
|
|
|
|
/******************************************************************/
|
|
/* mozilla::EventStateManager::DeltaAccumulator */
|
|
/******************************************************************/
|
|
|
|
void EventStateManager::DeltaAccumulator::InitLineOrPageDelta(
|
|
nsIFrame* aTargetFrame, EventStateManager* aESM, WidgetWheelEvent* aEvent) {
|
|
MOZ_ASSERT(aESM);
|
|
MOZ_ASSERT(aEvent);
|
|
|
|
// Reset if the previous wheel event is too old.
|
|
if (!mLastTime.IsNull()) {
|
|
TimeDuration duration = TimeStamp::Now() - mLastTime;
|
|
if (duration.ToMilliseconds() >
|
|
StaticPrefs::mousewheel_transaction_timeout()) {
|
|
Reset();
|
|
}
|
|
}
|
|
// If we have accumulated delta, we may need to reset it.
|
|
if (IsInTransaction()) {
|
|
// If wheel event type is changed, reset the values.
|
|
if (mHandlingDeltaMode != aEvent->mDeltaMode ||
|
|
mIsNoLineOrPageDeltaDevice != aEvent->mIsNoLineOrPageDelta) {
|
|
Reset();
|
|
} else {
|
|
// If the delta direction is changed, we should reset only the
|
|
// accumulated values.
|
|
if (mX && aEvent->mDeltaX && ((aEvent->mDeltaX > 0.0) != (mX > 0.0))) {
|
|
mX = mPendingScrollAmountX = 0.0;
|
|
}
|
|
if (mY && aEvent->mDeltaY && ((aEvent->mDeltaY > 0.0) != (mY > 0.0))) {
|
|
mY = mPendingScrollAmountY = 0.0;
|
|
}
|
|
}
|
|
}
|
|
|
|
mHandlingDeltaMode = aEvent->mDeltaMode;
|
|
mIsNoLineOrPageDeltaDevice = aEvent->mIsNoLineOrPageDelta;
|
|
|
|
// If it's handling neither a device that does not provide line or page deltas
|
|
// nor delta values multiplied by prefs, we must not modify lineOrPageDelta
|
|
// values.
|
|
if (!mIsNoLineOrPageDeltaDevice &&
|
|
!EventStateManager::WheelPrefs::GetInstance()
|
|
->NeedToComputeLineOrPageDelta(aEvent)) {
|
|
// Set the delta values to mX and mY. They would be used when above block
|
|
// resets mX/mY/mPendingScrollAmountX/mPendingScrollAmountY if the direction
|
|
// is changed.
|
|
// NOTE: We shouldn't accumulate the delta values, it might could cause
|
|
// overflow even though it's not a realistic situation.
|
|
if (aEvent->mDeltaX) {
|
|
mX = aEvent->mDeltaX;
|
|
}
|
|
if (aEvent->mDeltaY) {
|
|
mY = aEvent->mDeltaY;
|
|
}
|
|
mLastTime = TimeStamp::Now();
|
|
return;
|
|
}
|
|
|
|
mX += aEvent->mDeltaX;
|
|
mY += aEvent->mDeltaY;
|
|
|
|
if (mHandlingDeltaMode == WheelEvent_Binding::DOM_DELTA_PIXEL) {
|
|
// Records pixel delta values and init mLineOrPageDeltaX and
|
|
// mLineOrPageDeltaY for wheel events which are caused by pixel only
|
|
// devices. Ignore mouse wheel transaction for computing this. The
|
|
// lineOrPageDelta values will be used by dispatching legacy
|
|
// eMouseScrollEventClass (DOMMouseScroll) but not be used for scrolling
|
|
// of default action. The transaction should be used only for the default
|
|
// action.
|
|
nsIFrame* frame = aESM->ComputeScrollTarget(
|
|
aTargetFrame, aEvent, COMPUTE_LEGACY_MOUSE_SCROLL_EVENT_TARGET);
|
|
nsPresContext* pc =
|
|
frame ? frame->PresContext() : aTargetFrame->PresContext();
|
|
nsIScrollableFrame* scrollTarget = do_QueryFrame(frame);
|
|
nsSize scrollAmount = aESM->GetScrollAmount(pc, aEvent, scrollTarget);
|
|
nsIntSize scrollAmountInCSSPixels(
|
|
nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.width),
|
|
nsPresContext::AppUnitsToIntCSSPixels(scrollAmount.height));
|
|
|
|
aEvent->mLineOrPageDeltaX = RoundDown(mX) / scrollAmountInCSSPixels.width;
|
|
aEvent->mLineOrPageDeltaY = RoundDown(mY) / scrollAmountInCSSPixels.height;
|
|
|
|
mX -= aEvent->mLineOrPageDeltaX * scrollAmountInCSSPixels.width;
|
|
mY -= aEvent->mLineOrPageDeltaY * scrollAmountInCSSPixels.height;
|
|
} else {
|
|
aEvent->mLineOrPageDeltaX = RoundDown(mX);
|
|
aEvent->mLineOrPageDeltaY = RoundDown(mY);
|
|
mX -= aEvent->mLineOrPageDeltaX;
|
|
mY -= aEvent->mLineOrPageDeltaY;
|
|
}
|
|
|
|
mLastTime = TimeStamp::Now();
|
|
}
|
|
|
|
void EventStateManager::DeltaAccumulator::Reset() {
|
|
mX = mY = 0.0;
|
|
mPendingScrollAmountX = mPendingScrollAmountY = 0.0;
|
|
mHandlingDeltaMode = UINT32_MAX;
|
|
mIsNoLineOrPageDeltaDevice = false;
|
|
}
|
|
|
|
nsIntPoint
|
|
EventStateManager::DeltaAccumulator::ComputeScrollAmountForDefaultAction(
|
|
WidgetWheelEvent* aEvent, const nsIntSize& aScrollAmountInDevPixels) {
|
|
MOZ_ASSERT(aEvent);
|
|
|
|
// If the wheel event is line scroll and the delta value is computed from
|
|
// system settings, allow to override the system speed.
|
|
bool allowScrollSpeedOverride =
|
|
(!aEvent->mCustomizedByUserPrefs &&
|
|
aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_LINE);
|
|
DeltaValues acceleratedDelta =
|
|
WheelTransaction::AccelerateWheelDelta(aEvent, allowScrollSpeedOverride);
|
|
|
|
nsIntPoint result(0, 0);
|
|
if (aEvent->mDeltaMode == WheelEvent_Binding::DOM_DELTA_PIXEL) {
|
|
mPendingScrollAmountX += acceleratedDelta.deltaX;
|
|
mPendingScrollAmountY += acceleratedDelta.deltaY;
|
|
} else {
|
|
mPendingScrollAmountX +=
|
|
aScrollAmountInDevPixels.width * acceleratedDelta.deltaX;
|
|
mPendingScrollAmountY +=
|
|
aScrollAmountInDevPixels.height * acceleratedDelta.deltaY;
|
|
}
|
|
result.x = RoundDown(mPendingScrollAmountX);
|
|
result.y = RoundDown(mPendingScrollAmountY);
|
|
mPendingScrollAmountX -= result.x;
|
|
mPendingScrollAmountY -= result.y;
|
|
|
|
return result;
|
|
}
|
|
|
|
/******************************************************************/
|
|
/* mozilla::EventStateManager::WheelPrefs */
|
|
/******************************************************************/
|
|
|
|
// static
|
|
EventStateManager::WheelPrefs* EventStateManager::WheelPrefs::GetInstance() {
|
|
if (!sInstance) {
|
|
sInstance = new WheelPrefs();
|
|
}
|
|
return sInstance;
|
|
}
|
|
|
|
// static
|
|
void EventStateManager::WheelPrefs::Shutdown() {
|
|
delete sInstance;
|
|
sInstance = nullptr;
|
|
}
|
|
|
|
// static
|
|
void EventStateManager::WheelPrefs::OnPrefChanged(const char* aPrefName,
|
|
void* aClosure) {
|
|
// forget all prefs, it's not problem for performance.
|
|
sInstance->Reset();
|
|
DeltaAccumulator::GetInstance()->Reset();
|
|
}
|
|
|
|
EventStateManager::WheelPrefs::WheelPrefs() {
|
|
Reset();
|
|
Preferences::RegisterPrefixCallback(OnPrefChanged, "mousewheel.");
|
|
}
|
|
|
|
EventStateManager::WheelPrefs::~WheelPrefs() {
|
|
Preferences::UnregisterPrefixCallback(OnPrefChanged, "mousewheel.");
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::Reset() { memset(mInit, 0, sizeof(mInit)); }
|
|
|
|
EventStateManager::WheelPrefs::Index EventStateManager::WheelPrefs::GetIndexFor(
|
|
const WidgetWheelEvent* aEvent) {
|
|
if (!aEvent) {
|
|
return INDEX_DEFAULT;
|
|
}
|
|
|
|
Modifiers modifiers =
|
|
(aEvent->mModifiers & (MODIFIER_ALT | MODIFIER_CONTROL | MODIFIER_META |
|
|
MODIFIER_SHIFT | MODIFIER_OS));
|
|
|
|
switch (modifiers) {
|
|
case MODIFIER_ALT:
|
|
return INDEX_ALT;
|
|
case MODIFIER_CONTROL:
|
|
return INDEX_CONTROL;
|
|
case MODIFIER_META:
|
|
return INDEX_META;
|
|
case MODIFIER_SHIFT:
|
|
return INDEX_SHIFT;
|
|
case MODIFIER_OS:
|
|
return INDEX_OS;
|
|
default:
|
|
// If two or more modifier keys are pressed, we should use default
|
|
// settings.
|
|
return INDEX_DEFAULT;
|
|
}
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::GetBasePrefName(
|
|
EventStateManager::WheelPrefs::Index aIndex, nsACString& aBasePrefName) {
|
|
aBasePrefName.AssignLiteral("mousewheel.");
|
|
switch (aIndex) {
|
|
case INDEX_ALT:
|
|
aBasePrefName.AppendLiteral("with_alt.");
|
|
break;
|
|
case INDEX_CONTROL:
|
|
aBasePrefName.AppendLiteral("with_control.");
|
|
break;
|
|
case INDEX_META:
|
|
aBasePrefName.AppendLiteral("with_meta.");
|
|
break;
|
|
case INDEX_SHIFT:
|
|
aBasePrefName.AppendLiteral("with_shift.");
|
|
break;
|
|
case INDEX_OS:
|
|
aBasePrefName.AppendLiteral("with_win.");
|
|
break;
|
|
case INDEX_DEFAULT:
|
|
default:
|
|
aBasePrefName.AppendLiteral("default.");
|
|
break;
|
|
}
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::Init(
|
|
EventStateManager::WheelPrefs::Index aIndex) {
|
|
if (mInit[aIndex]) {
|
|
return;
|
|
}
|
|
mInit[aIndex] = true;
|
|
|
|
nsAutoCString basePrefName;
|
|
GetBasePrefName(aIndex, basePrefName);
|
|
|
|
nsAutoCString prefNameX(basePrefName);
|
|
prefNameX.AppendLiteral("delta_multiplier_x");
|
|
mMultiplierX[aIndex] =
|
|
static_cast<double>(Preferences::GetInt(prefNameX.get(), 100)) / 100;
|
|
|
|
nsAutoCString prefNameY(basePrefName);
|
|
prefNameY.AppendLiteral("delta_multiplier_y");
|
|
mMultiplierY[aIndex] =
|
|
static_cast<double>(Preferences::GetInt(prefNameY.get(), 100)) / 100;
|
|
|
|
nsAutoCString prefNameZ(basePrefName);
|
|
prefNameZ.AppendLiteral("delta_multiplier_z");
|
|
mMultiplierZ[aIndex] =
|
|
static_cast<double>(Preferences::GetInt(prefNameZ.get(), 100)) / 100;
|
|
|
|
nsAutoCString prefNameAction(basePrefName);
|
|
prefNameAction.AppendLiteral("action");
|
|
int32_t action = Preferences::GetInt(prefNameAction.get(), ACTION_SCROLL);
|
|
if (action < int32_t(ACTION_NONE) || action > int32_t(ACTION_LAST)) {
|
|
NS_WARNING("Unsupported action pref value, replaced with 'Scroll'.");
|
|
action = ACTION_SCROLL;
|
|
}
|
|
mActions[aIndex] = static_cast<Action>(action);
|
|
|
|
// Compute action values overridden by .override_x pref.
|
|
// At present, override is possible only for the x-direction
|
|
// because this pref is introduced mainly for tilt wheels.
|
|
// Note that ACTION_HORIZONTALIZED_SCROLL isn't a valid value for this pref
|
|
// because it affects only to deltaY.
|
|
prefNameAction.AppendLiteral(".override_x");
|
|
int32_t actionOverrideX = Preferences::GetInt(prefNameAction.get(), -1);
|
|
if (actionOverrideX < -1 || actionOverrideX > int32_t(ACTION_LAST) ||
|
|
actionOverrideX == ACTION_HORIZONTALIZED_SCROLL) {
|
|
NS_WARNING("Unsupported action override pref value, didn't override.");
|
|
actionOverrideX = -1;
|
|
}
|
|
mOverriddenActionsX[aIndex] = (actionOverrideX == -1)
|
|
? static_cast<Action>(action)
|
|
: static_cast<Action>(actionOverrideX);
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::GetMultiplierForDeltaXAndY(
|
|
const WidgetWheelEvent* aEvent, Index aIndex, double* aMultiplierForDeltaX,
|
|
double* aMultiplierForDeltaY) {
|
|
*aMultiplierForDeltaX = mMultiplierX[aIndex];
|
|
*aMultiplierForDeltaY = mMultiplierY[aIndex];
|
|
// If the event has been horizontalized(I.e. treated as a horizontal wheel
|
|
// scroll for a vertical wheel scroll), then we should swap mMultiplierX and
|
|
// mMultiplierY. By doing this, multipliers will still apply to the delta
|
|
// values they origianlly corresponded to.
|
|
if (aEvent->mDeltaValuesHorizontalizedForDefaultHandler &&
|
|
ComputeActionFor(aEvent) == ACTION_HORIZONTALIZED_SCROLL) {
|
|
std::swap(*aMultiplierForDeltaX, *aMultiplierForDeltaY);
|
|
}
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::ApplyUserPrefsToDelta(
|
|
WidgetWheelEvent* aEvent) {
|
|
if (aEvent->mCustomizedByUserPrefs) {
|
|
return;
|
|
}
|
|
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
|
|
double multiplierForDeltaX = 1.0, multiplierForDeltaY = 1.0;
|
|
GetMultiplierForDeltaXAndY(aEvent, index, &multiplierForDeltaX,
|
|
&multiplierForDeltaY);
|
|
aEvent->mDeltaX *= multiplierForDeltaX;
|
|
aEvent->mDeltaY *= multiplierForDeltaY;
|
|
aEvent->mDeltaZ *= mMultiplierZ[index];
|
|
|
|
// If the multiplier is 1.0 or -1.0, i.e., it doesn't change the absolute
|
|
// value, we should use lineOrPageDelta values which were set by widget.
|
|
// Otherwise, we need to compute them from accumulated delta values.
|
|
if (!NeedToComputeLineOrPageDelta(aEvent)) {
|
|
aEvent->mLineOrPageDeltaX *= static_cast<int32_t>(multiplierForDeltaX);
|
|
aEvent->mLineOrPageDeltaY *= static_cast<int32_t>(multiplierForDeltaY);
|
|
} else {
|
|
aEvent->mLineOrPageDeltaX = 0;
|
|
aEvent->mLineOrPageDeltaY = 0;
|
|
}
|
|
|
|
aEvent->mCustomizedByUserPrefs =
|
|
((mMultiplierX[index] != 1.0) || (mMultiplierY[index] != 1.0) ||
|
|
(mMultiplierZ[index] != 1.0));
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::CancelApplyingUserPrefsFromOverflowDelta(
|
|
WidgetWheelEvent* aEvent) {
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
|
|
// XXX If the multiplier pref value is negative, the scroll direction was
|
|
// changed and caused to scroll different direction. In such case,
|
|
// this method reverts the sign of overflowDelta. Does it make widget
|
|
// happy? Although, widget can know the pref applied delta values by
|
|
// referrencing the deltaX and deltaY of the event.
|
|
|
|
double multiplierForDeltaX = 1.0, multiplierForDeltaY = 1.0;
|
|
GetMultiplierForDeltaXAndY(aEvent, index, &multiplierForDeltaX,
|
|
&multiplierForDeltaY);
|
|
if (multiplierForDeltaX) {
|
|
aEvent->mOverflowDeltaX /= multiplierForDeltaX;
|
|
}
|
|
if (multiplierForDeltaY) {
|
|
aEvent->mOverflowDeltaY /= multiplierForDeltaY;
|
|
}
|
|
}
|
|
|
|
EventStateManager::WheelPrefs::Action
|
|
EventStateManager::WheelPrefs::ComputeActionFor(
|
|
const WidgetWheelEvent* aEvent) {
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
|
|
bool deltaXPreferred = (Abs(aEvent->mDeltaX) > Abs(aEvent->mDeltaY) &&
|
|
Abs(aEvent->mDeltaX) > Abs(aEvent->mDeltaZ));
|
|
Action* actions = deltaXPreferred ? mOverriddenActionsX : mActions;
|
|
if (actions[index] == ACTION_NONE || actions[index] == ACTION_SCROLL ||
|
|
actions[index] == ACTION_HORIZONTALIZED_SCROLL) {
|
|
return actions[index];
|
|
}
|
|
|
|
// Momentum events shouldn't run special actions.
|
|
if (aEvent->mIsMomentum) {
|
|
// Use the default action. Note that user might kill the wheel scrolling.
|
|
Init(INDEX_DEFAULT);
|
|
if (actions[INDEX_DEFAULT] == ACTION_SCROLL ||
|
|
actions[INDEX_DEFAULT] == ACTION_HORIZONTALIZED_SCROLL) {
|
|
return actions[INDEX_DEFAULT];
|
|
}
|
|
return ACTION_NONE;
|
|
}
|
|
|
|
return actions[index];
|
|
}
|
|
|
|
bool EventStateManager::WheelPrefs::NeedToComputeLineOrPageDelta(
|
|
const WidgetWheelEvent* aEvent) {
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
|
|
return (mMultiplierX[index] != 1.0 && mMultiplierX[index] != -1.0) ||
|
|
(mMultiplierY[index] != 1.0 && mMultiplierY[index] != -1.0);
|
|
}
|
|
|
|
void EventStateManager::WheelPrefs::GetUserPrefsForEvent(
|
|
const WidgetWheelEvent* aEvent, double* aOutMultiplierX,
|
|
double* aOutMultiplierY) {
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
|
|
double multiplierForDeltaX = 1.0, multiplierForDeltaY = 1.0;
|
|
GetMultiplierForDeltaXAndY(aEvent, index, &multiplierForDeltaX,
|
|
&multiplierForDeltaY);
|
|
*aOutMultiplierX = multiplierForDeltaX;
|
|
*aOutMultiplierY = multiplierForDeltaY;
|
|
}
|
|
|
|
// static
|
|
Maybe<layers::APZWheelAction> EventStateManager::APZWheelActionFor(
|
|
const WidgetWheelEvent* aEvent) {
|
|
if (aEvent->mMessage != eWheel) {
|
|
return Nothing();
|
|
}
|
|
WheelPrefs::Action action =
|
|
WheelPrefs::GetInstance()->ComputeActionFor(aEvent);
|
|
switch (action) {
|
|
case WheelPrefs::ACTION_SCROLL:
|
|
case WheelPrefs::ACTION_HORIZONTALIZED_SCROLL:
|
|
return Some(layers::APZWheelAction::Scroll);
|
|
case WheelPrefs::ACTION_PINCH_ZOOM:
|
|
return Some(layers::APZWheelAction::PinchZoom);
|
|
default:
|
|
return Nothing();
|
|
}
|
|
}
|
|
|
|
// static
|
|
WheelDeltaAdjustmentStrategy EventStateManager::GetWheelDeltaAdjustmentStrategy(
|
|
const WidgetWheelEvent& aEvent) {
|
|
if (aEvent.mMessage != eWheel) {
|
|
return WheelDeltaAdjustmentStrategy::eNone;
|
|
}
|
|
switch (WheelPrefs::GetInstance()->ComputeActionFor(&aEvent)) {
|
|
case WheelPrefs::ACTION_SCROLL:
|
|
if (StaticPrefs::mousewheel_autodir_enabled() && 0 == aEvent.mDeltaZ) {
|
|
if (StaticPrefs::mousewheel_autodir_honourroot()) {
|
|
return WheelDeltaAdjustmentStrategy::eAutoDirWithRootHonour;
|
|
}
|
|
return WheelDeltaAdjustmentStrategy::eAutoDir;
|
|
}
|
|
return WheelDeltaAdjustmentStrategy::eNone;
|
|
case WheelPrefs::ACTION_HORIZONTALIZED_SCROLL:
|
|
return WheelDeltaAdjustmentStrategy::eHorizontalize;
|
|
default:
|
|
break;
|
|
}
|
|
return WheelDeltaAdjustmentStrategy::eNone;
|
|
}
|
|
|
|
void EventStateManager::GetUserPrefsForWheelEvent(
|
|
const WidgetWheelEvent* aEvent, double* aOutMultiplierX,
|
|
double* aOutMultiplierY) {
|
|
WheelPrefs::GetInstance()->GetUserPrefsForEvent(aEvent, aOutMultiplierX,
|
|
aOutMultiplierY);
|
|
}
|
|
|
|
bool EventStateManager::WheelPrefs::IsOverOnePageScrollAllowedX(
|
|
const WidgetWheelEvent* aEvent) {
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
return Abs(mMultiplierX[index]) >=
|
|
MIN_MULTIPLIER_VALUE_ALLOWING_OVER_ONE_PAGE_SCROLL;
|
|
}
|
|
|
|
bool EventStateManager::WheelPrefs::IsOverOnePageScrollAllowedY(
|
|
const WidgetWheelEvent* aEvent) {
|
|
Index index = GetIndexFor(aEvent);
|
|
Init(index);
|
|
return Abs(mMultiplierY[index]) >=
|
|
MIN_MULTIPLIER_VALUE_ALLOWING_OVER_ONE_PAGE_SCROLL;
|
|
}
|
|
|
|
} // namespace mozilla
|