mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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349 lines
12 KiB
C++
349 lines
12 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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#ifndef mozilla_dom_Event_h_
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#define mozilla_dom_Event_h_
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#include "mozilla/Attributes.h"
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#include "mozilla/BasicEvents.h"
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#include "nsIDOMEvent.h"
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#include "nsISupports.h"
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#include "nsCOMPtr.h"
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#include "nsPIDOMWindow.h"
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#include "nsPoint.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsAutoPtr.h"
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#include "mozilla/dom/EventBinding.h"
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#include "nsIScriptGlobalObject.h"
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#include "Units.h"
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#include "js/TypeDecls.h"
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#include "nsIGlobalObject.h"
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class nsIContent;
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class nsIDOMEventTarget;
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class nsPresContext;
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namespace mozilla {
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namespace dom {
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class EventTarget;
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class WantsPopupControlCheck;
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#define GENERATED_EVENT(EventClass_) class EventClass_;
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#include "mozilla/dom/GeneratedEventList.h"
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#undef GENERATED_EVENT
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// ExtendableEvent is a ServiceWorker event that is not
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// autogenerated since it has some extra methods.
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namespace workers {
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class ExtendableEvent;
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} // namespace workers
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// Dummy class so we can cast through it to get from nsISupports to
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// Event subclasses with only two non-ambiguous static casts.
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class EventBase : public nsIDOMEvent
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{
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};
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class Event : public EventBase,
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public nsWrapperCache
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{
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public:
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Event(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetEvent* aEvent);
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explicit Event(nsPIDOMWindow* aWindow);
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protected:
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virtual ~Event();
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private:
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void ConstructorInit(EventTarget* aOwner,
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nsPresContext* aPresContext,
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WidgetEvent* aEvent);
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public:
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static Event* FromSupports(nsISupports* aSupports)
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{
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nsIDOMEvent* event =
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static_cast<nsIDOMEvent*>(aSupports);
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#ifdef DEBUG
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{
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nsCOMPtr<nsIDOMEvent> target_qi =
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do_QueryInterface(aSupports);
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// If this assertion fires the QI implementation for the object in
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// question doesn't use the nsIDOMEvent pointer as the
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// nsISupports pointer. That must be fixed, or we'll crash...
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MOZ_ASSERT(target_qi == event, "Uh, fix QI!");
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}
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#endif
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return static_cast<Event*>(event);
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}
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(Event)
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nsIGlobalObject* GetParentObject()
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{
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return mOwner;
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}
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virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override final;
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virtual JSObject* WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto);
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#define GENERATED_EVENT(EventClass_) \
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virtual EventClass_* As##EventClass_() \
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{ \
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return nullptr; \
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}
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#include "mozilla/dom/GeneratedEventList.h"
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#undef GENERATED_EVENT
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// ExtendableEvent is a ServiceWorker event that is not
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// autogenerated since it has some extra methods.
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virtual workers::ExtendableEvent* AsExtendableEvent()
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{
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return nullptr;
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}
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// nsIDOMEvent Interface
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NS_DECL_NSIDOMEVENT
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void InitPresContextData(nsPresContext* aPresContext);
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// Returns true if the event should be trusted.
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bool Init(EventTarget* aGlobal);
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static PopupControlState GetEventPopupControlState(WidgetEvent* aEvent,
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nsIDOMEvent* aDOMEvent = nullptr);
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static void PopupAllowedEventsChanged();
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static void Shutdown();
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static const char* GetEventName(uint32_t aEventType);
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static CSSIntPoint GetClientCoords(nsPresContext* aPresContext,
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WidgetEvent* aEvent,
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LayoutDeviceIntPoint aPoint,
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CSSIntPoint aDefaultPoint);
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static CSSIntPoint GetPageCoords(nsPresContext* aPresContext,
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WidgetEvent* aEvent,
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LayoutDeviceIntPoint aPoint,
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CSSIntPoint aDefaultPoint);
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static LayoutDeviceIntPoint GetScreenCoords(nsPresContext* aPresContext,
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WidgetEvent* aEvent,
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LayoutDeviceIntPoint aPoint);
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static CSSIntPoint GetOffsetCoords(nsPresContext* aPresContext,
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WidgetEvent* aEvent,
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LayoutDeviceIntPoint aPoint,
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CSSIntPoint aDefaultPoint);
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static already_AddRefed<Event> Constructor(const GlobalObject& aGlobal,
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const nsAString& aType,
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const EventInit& aParam,
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ErrorResult& aRv);
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// Implemented as xpidl method
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// void GetType(nsString& aRetval) {}
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EventTarget* GetTarget() const;
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EventTarget* GetCurrentTarget() const;
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uint16_t EventPhase() const;
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// xpidl implementation
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// void StopPropagation();
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// xpidl implementation
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// void StopImmediatePropagation();
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bool Bubbles() const
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{
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return mEvent->mFlags.mBubbles;
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}
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bool Cancelable() const
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{
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return mEvent->mFlags.mCancelable;
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}
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// xpidl implementation
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// void PreventDefault();
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// You MUST NOT call PreventDefaultJ(JSContext*) from C++ code. A call of
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// this method always sets Event.defaultPrevented true for web contents.
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// If default action handler calls this, web applications meet wrong
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// defaultPrevented value.
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void PreventDefault(JSContext* aCx);
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// You MUST NOT call DefaultPrevented(JSContext*) from C++ code. This may
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// return false even if PreventDefault() has been called.
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// See comments in its implementation for the detail.
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bool DefaultPrevented(JSContext* aCx) const;
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bool DefaultPrevented() const
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{
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return mEvent->mFlags.mDefaultPrevented;
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}
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bool MultipleActionsPrevented() const
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{
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return mEvent->mFlags.mMultipleActionsPrevented;
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}
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bool IsTrusted() const
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{
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return mEvent->mFlags.mIsTrusted;
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}
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bool IsSynthesized() const
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{
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return mEvent->mFlags.mIsSynthesizedForTests;
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}
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double TimeStamp() const;
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void InitEvent(const nsAString& aType, bool aBubbles, bool aCancelable,
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ErrorResult& aRv)
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{
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aRv = InitEvent(aType, aBubbles, aCancelable);
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}
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EventTarget* GetOriginalTarget() const;
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EventTarget* GetExplicitOriginalTarget() const;
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EventTarget* GetComposedTarget() const;
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bool GetPreventDefault() const;
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/**
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* @param aCalledByDefaultHandler Should be true when this is called by
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* C++ or Chrome. Otherwise, e.g., called
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* by a call of Event.preventDefault() in
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* content script, false.
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*/
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void PreventDefaultInternal(bool aCalledByDefaultHandler);
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bool IsMainThreadEvent()
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{
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return mIsMainThreadEvent;
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}
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/**
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* For a given current target, returns the related target adjusted with
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* shadow DOM retargeting rules. Returns nullptr if related target
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* is not adjusted.
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*/
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static nsIContent* GetShadowRelatedTarget(nsIContent* aCurrentTarget,
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nsIContent* aRelatedTarget);
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protected:
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// Internal helper functions
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void SetEventType(const nsAString& aEventTypeArg);
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already_AddRefed<nsIContent> GetTargetFromFrame();
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friend class WantsPopupControlCheck;
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void SetWantsPopupControlCheck(bool aCheck)
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{
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mWantsPopupControlCheck = aCheck;
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}
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bool GetWantsPopupControlCheck()
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{
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return IsTrusted() && mWantsPopupControlCheck;
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}
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/**
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* IsChrome() returns true if aCx is chrome context or the event is created
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* in chrome's thread. Otherwise, false.
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*/
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bool IsChrome(JSContext* aCx) const;
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mozilla::WidgetEvent* mEvent;
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nsRefPtr<nsPresContext> mPresContext;
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nsCOMPtr<EventTarget> mExplicitOriginalTarget;
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nsCOMPtr<nsIGlobalObject> mOwner;
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bool mEventIsInternal;
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bool mPrivateDataDuplicated;
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bool mIsMainThreadEvent;
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// True when popup control check should rely on event.type, not
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// WidgetEvent.mMessage.
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bool mWantsPopupControlCheck;
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};
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class MOZ_STACK_CLASS WantsPopupControlCheck
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{
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public:
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explicit WantsPopupControlCheck(nsIDOMEvent* aEvent) :
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mEvent(aEvent->InternalDOMEvent())
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{
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mOriginalWantsPopupControlCheck = mEvent->GetWantsPopupControlCheck();
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mEvent->SetWantsPopupControlCheck(mEvent->IsTrusted());
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}
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~WantsPopupControlCheck()
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{
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mEvent->SetWantsPopupControlCheck(mOriginalWantsPopupControlCheck);
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}
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private:
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Event* mEvent;
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bool mOriginalWantsPopupControlCheck;
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};
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} // namespace dom
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} // namespace mozilla
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#define NS_FORWARD_TO_EVENT \
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NS_FORWARD_NSIDOMEVENT(Event::)
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#define NS_FORWARD_NSIDOMEVENT_NO_SERIALIZATION_NO_DUPLICATION(_to) \
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NS_IMETHOD GetType(nsAString& aType) override { return _to GetType(aType); } \
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NS_IMETHOD GetTarget(nsIDOMEventTarget** aTarget) override { return _to GetTarget(aTarget); } \
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NS_IMETHOD GetCurrentTarget(nsIDOMEventTarget** aCurrentTarget) override { return _to GetCurrentTarget(aCurrentTarget); } \
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NS_IMETHOD GetEventPhase(uint16_t* aEventPhase) override { return _to GetEventPhase(aEventPhase); } \
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NS_IMETHOD GetBubbles(bool* aBubbles) override { return _to GetBubbles(aBubbles); } \
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NS_IMETHOD GetCancelable(bool* aCancelable) override { return _to GetCancelable(aCancelable); } \
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NS_IMETHOD GetTimeStamp(DOMTimeStamp* aTimeStamp) override { return _to GetTimeStamp(aTimeStamp); } \
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NS_IMETHOD StopPropagation(void) override { return _to StopPropagation(); } \
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NS_IMETHOD StopCrossProcessForwarding(void) override { return _to StopCrossProcessForwarding(); } \
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NS_IMETHOD PreventDefault(void) override { return _to PreventDefault(); } \
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NS_IMETHOD InitEvent(const nsAString& eventTypeArg, bool canBubbleArg, bool cancelableArg) override { return _to InitEvent(eventTypeArg, canBubbleArg, cancelableArg); } \
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NS_IMETHOD GetDefaultPrevented(bool* aDefaultPrevented) override { return _to GetDefaultPrevented(aDefaultPrevented); } \
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NS_IMETHOD StopImmediatePropagation(void) override { return _to StopImmediatePropagation(); } \
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NS_IMETHOD GetOriginalTarget(nsIDOMEventTarget** aOriginalTarget) override { return _to GetOriginalTarget(aOriginalTarget); } \
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NS_IMETHOD GetExplicitOriginalTarget(nsIDOMEventTarget** aExplicitOriginalTarget) override { return _to GetExplicitOriginalTarget(aExplicitOriginalTarget); } \
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NS_IMETHOD GetPreventDefault(bool* aRetval) override { return _to GetPreventDefault(aRetval); } \
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NS_IMETHOD GetIsTrusted(bool* aIsTrusted) override { return _to GetIsTrusted(aIsTrusted); } \
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NS_IMETHOD SetTarget(nsIDOMEventTarget* aTarget) override { return _to SetTarget(aTarget); } \
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NS_IMETHOD_(bool) IsDispatchStopped(void) override { return _to IsDispatchStopped(); } \
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NS_IMETHOD_(WidgetEvent*) GetInternalNSEvent(void) override { return _to GetInternalNSEvent(); } \
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NS_IMETHOD_(void) SetTrusted(bool aTrusted) override { _to SetTrusted(aTrusted); } \
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NS_IMETHOD_(void) SetOwner(EventTarget* aOwner) override { _to SetOwner(aOwner); } \
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NS_IMETHOD_(Event*) InternalDOMEvent() override { return _to InternalDOMEvent(); }
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#define NS_FORWARD_TO_EVENT_NO_SERIALIZATION_NO_DUPLICATION \
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NS_FORWARD_NSIDOMEVENT_NO_SERIALIZATION_NO_DUPLICATION(Event::)
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inline nsISupports*
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ToSupports(mozilla::dom::Event* e)
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{
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return static_cast<nsIDOMEvent*>(e);
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}
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inline nsISupports*
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ToCanonicalSupports(mozilla::dom::Event* e)
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{
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return static_cast<nsIDOMEvent*>(e);
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}
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already_AddRefed<mozilla::dom::Event>
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NS_NewDOMEvent(mozilla::dom::EventTarget* aOwner,
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nsPresContext* aPresContext,
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mozilla::WidgetEvent* aEvent);
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#endif // mozilla_dom_Event_h_
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