gecko-dev/dom/events/DOMEventTargetHelper.h

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C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_DOMEventTargetHelper_h_
#define mozilla_DOMEventTargetHelper_h_
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#include "nsCOMPtr.h"
#include "nsGkAtoms.h"
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#include "nsCycleCollectionParticipant.h"
#include "nsPIDOMWindow.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptContext.h"
#include "nsIWeakReferenceUtils.h"
#include "MainThreadUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/dom/EventTarget.h"
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struct JSCompartment;
class nsIDocument;
namespace mozilla {
class ErrorResult;
#define NS_DOMEVENTTARGETHELPER_IID \
{ 0xa28385c6, 0x9451, 0x4d7e, \
{ 0xa3, 0xdd, 0xf4, 0xb6, 0x87, 0x2f, 0xa4, 0x76 } }
class DOMEventTargetHelper : public dom::EventTarget
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{
public:
DOMEventTargetHelper()
: mParentObject(nullptr)
, mOwnerWindow(nullptr)
, mHasOrHasHadOwnerWindow(false)
{
}
explicit DOMEventTargetHelper(nsPIDOMWindowInner* aWindow)
: mParentObject(nullptr)
, mOwnerWindow(nullptr)
, mHasOrHasHadOwnerWindow(false)
{
BindToOwner(aWindow);
}
explicit DOMEventTargetHelper(nsIGlobalObject* aGlobalObject)
: mParentObject(nullptr)
, mOwnerWindow(nullptr)
, mHasOrHasHadOwnerWindow(false)
{
BindToOwner(aGlobalObject);
}
explicit DOMEventTargetHelper(DOMEventTargetHelper* aOther)
: mParentObject(nullptr)
, mOwnerWindow(nullptr)
, mHasOrHasHadOwnerWindow(false)
{
BindToOwner(aOther);
}
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(DOMEventTargetHelper)
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NS_DECL_NSIDOMEVENTTARGET
virtual EventListenerManager* GetExistingListenerManager() const override;
virtual EventListenerManager* GetOrCreateListenerManager() override;
using dom::EventTarget::RemoveEventListener;
virtual void AddEventListener(const nsAString& aType,
dom::EventListener* aListener,
const dom::AddEventListenerOptionsOrBoolean& aOptions,
const dom::Nullable<bool>& aWantsUntrusted,
ErrorResult& aRv) override;
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOMEVENTTARGETHELPER_IID)
void GetParentObject(nsIScriptGlobalObject **aParentObject)
{
if (mParentObject) {
CallQueryInterface(mParentObject, aParentObject);
} else {
*aParentObject = nullptr;
}
}
static DOMEventTargetHelper* FromSupports(nsISupports* aSupports)
{
dom::EventTarget* target = static_cast<dom::EventTarget*>(aSupports);
#ifdef DEBUG
{
nsCOMPtr<dom::EventTarget> target_qi = do_QueryInterface(aSupports);
// If this assertion fires the QI implementation for the object in
// question doesn't use the EventTarget pointer as the
// nsISupports pointer. That must be fixed, or we'll crash...
NS_ASSERTION(target_qi == target, "Uh, fix QI!");
}
#endif
return static_cast<DOMEventTargetHelper*>(target);
}
bool HasListenersFor(const nsAString& aType)
{
return mListenerManager && mListenerManager->HasListenersFor(aType);
}
bool HasListenersFor(nsIAtom* aTypeWithOn)
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{
return mListenerManager && mListenerManager->HasListenersFor(aTypeWithOn);
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}
nsresult SetEventHandler(nsIAtom* aType,
JSContext* aCx,
const JS::Value& aValue);
using dom::EventTarget::SetEventHandler;
void GetEventHandler(nsIAtom* aType,
JSContext* aCx,
JS::Value* aValue);
using dom::EventTarget::GetEventHandler;
virtual nsPIDOMWindowOuter* GetOwnerGlobalForBindings() override
{
return nsPIDOMWindowOuter::GetFromCurrentInner(GetOwner());
}
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nsresult CheckInnerWindowCorrectness() const
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{
NS_ENSURE_STATE(!mHasOrHasHadOwnerWindow || mOwnerWindow);
if (mOwnerWindow && !mOwnerWindow->IsCurrentInnerWindow()) {
return NS_ERROR_FAILURE;
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}
return NS_OK;
}
nsPIDOMWindowInner* GetOwner() const { return mOwnerWindow; }
// Like GetOwner, but only returns non-null if the window being returned is
// current (in the "current document" sense of the HTML spec).
nsPIDOMWindowInner* GetWindowIfCurrent() const;
// Returns the document associated with this event target, if that document is
// the current document of its browsing context. Will return null otherwise.
nsIDocument* GetDocumentIfCurrent() const;
void BindToOwner(nsIGlobalObject* aOwner);
void BindToOwner(nsPIDOMWindowInner* aOwner);
void BindToOwner(DOMEventTargetHelper* aOther);
virtual void DisconnectFromOwner();
nsIGlobalObject* GetParentObject() const
{
return GetOwnerGlobal();
}
virtual nsIGlobalObject* GetOwnerGlobal() const override
{
nsCOMPtr<nsIGlobalObject> parentObject = do_QueryReferent(mParentObject);
return parentObject;
}
bool HasOrHasHadOwner() { return mHasOrHasHadOwnerWindow; }
virtual void EventListenerAdded(nsIAtom* aType) override;
virtual void EventListenerRemoved(nsIAtom* aType) override;
virtual void EventListenerWasAdded(const nsAString& aType,
ErrorResult& aRv,
JSCompartment* aCompartment = nullptr) {}
virtual void EventListenerWasRemoved(const nsAString& aType,
ErrorResult& aRv,
JSCompartment* aCompartment = nullptr) {}
// Dispatch a trusted, non-cancellable and non-bubbling event to |this|.
nsresult DispatchTrustedEvent(const nsAString& aEventName);
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protected:
virtual ~DOMEventTargetHelper();
nsresult WantsUntrusted(bool* aRetVal);
// If this method returns true your object is kept alive until it returns
// false. You can use this method instead using
// NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN macro.
virtual bool IsCertainlyAliveForCC() const
{
return false;
}
Bug 1207245 - part 6 - rename nsRefPtr<T> to RefPtr<T>; r=ehsan; a=Tomcat The bulk of this commit was generated with a script, executed at the top level of a typical source code checkout. The only non-machine-generated part was modifying MFBT's moz.build to reflect the new naming. CLOSED TREE makes big refactorings like this a piece of cake. # The main substitution. find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \ xargs perl -p -i -e ' s/nsRefPtr\.h/RefPtr\.h/g; # handle includes s/nsRefPtr ?</RefPtr</g; # handle declarations and variables ' # Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h. perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h # Handle nsRefPtr.h itself, a couple places that define constructors # from nsRefPtr, and code generators specially. We do this here, rather # than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename # things like nsRefPtrHashtable. perl -p -i -e 's/nsRefPtr/RefPtr/g' \ mfbt/nsRefPtr.h \ xpcom/glue/nsCOMPtr.h \ xpcom/base/OwningNonNull.h \ ipc/ipdl/ipdl/lower.py \ ipc/ipdl/ipdl/builtin.py \ dom/bindings/Codegen.py \ python/lldbutils/lldbutils/utils.py # In our indiscriminate substitution above, we renamed # nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up. find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \ xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g' if [ -d .git ]; then git mv mfbt/nsRefPtr.h mfbt/RefPtr.h else hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h fi --HG-- rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
2015-10-18 08:24:48 +03:00
RefPtr<EventListenerManager> mListenerManager;
// Make |event| trusted and dispatch |aEvent| to |this|.
nsresult DispatchTrustedEvent(nsIDOMEvent* aEvent);
virtual void LastRelease() {}
private:
// Inner window or sandbox.
nsWeakPtr mParentObject;
// mParentObject pre QI-ed and cached (inner window)
// (it is needed for off main thread access)
// It is obtained in BindToOwner and reset in DisconnectFromOwner.
nsPIDOMWindowInner* MOZ_NON_OWNING_REF mOwnerWindow;
bool mHasOrHasHadOwnerWindow;
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};
NS_DEFINE_STATIC_IID_ACCESSOR(DOMEventTargetHelper,
NS_DOMEVENTTARGETHELPER_IID)
} // namespace mozilla
// XPIDL event handlers
#define NS_IMPL_EVENT_HANDLER(_class, _event) \
NS_IMETHODIMP _class::GetOn##_event(JSContext* aCx, \
JS::MutableHandle<JS::Value> aValue) \
{ \
GetEventHandler(nsGkAtoms::on##_event, aCx, aValue.address()); \
return NS_OK; \
} \
NS_IMETHODIMP _class::SetOn##_event(JSContext* aCx, \
JS::Handle<JS::Value> aValue) \
{ \
return SetEventHandler(nsGkAtoms::on##_event, aCx, aValue); \
}
#define NS_IMPL_FORWARD_EVENT_HANDLER(_class, _event, _baseclass) \
NS_IMETHODIMP _class::GetOn##_event(JSContext* aCx, \
JS::MutableHandle<JS::Value> aValue) \
{ \
return _baseclass::GetOn##_event(aCx, aValue); \
} \
NS_IMETHODIMP _class::SetOn##_event(JSContext* aCx, \
JS::Handle<JS::Value> aValue) \
{ \
return _baseclass::SetOn##_event(aCx, aValue); \
}
// WebIDL event handlers
#define IMPL_EVENT_HANDLER(_event) \
inline mozilla::dom::EventHandlerNonNull* GetOn##_event() \
{ \
if (NS_IsMainThread()) { \
return GetEventHandler(nsGkAtoms::on##_event, EmptyString()); \
} \
return GetEventHandler(nullptr, NS_LITERAL_STRING(#_event)); \
} \
inline void SetOn##_event(mozilla::dom::EventHandlerNonNull* aCallback) \
{ \
if (NS_IsMainThread()) { \
SetEventHandler(nsGkAtoms::on##_event, EmptyString(), aCallback); \
} else { \
SetEventHandler(nullptr, NS_LITERAL_STRING(#_event), aCallback); \
} \
}
/* Use this macro to declare functions that forward the behavior of this
* interface to another object.
* This macro doesn't forward PreHandleEvent because sometimes subclasses
* want to override it.
*/
#define NS_FORWARD_NSIDOMEVENTTARGET_NOPREHANDLEEVENT(_to) \
NS_IMETHOD AddEventListener(const nsAString & type, nsIDOMEventListener *listener, bool useCapture, bool wantsUntrusted, uint8_t _argc) { \
return _to AddEventListener(type, listener, useCapture, wantsUntrusted, _argc); \
} \
NS_IMETHOD AddSystemEventListener(const nsAString & type, nsIDOMEventListener *listener, bool aUseCapture, bool aWantsUntrusted, uint8_t _argc) { \
return _to AddSystemEventListener(type, listener, aUseCapture, aWantsUntrusted, _argc); \
} \
NS_IMETHOD RemoveEventListener(const nsAString & type, nsIDOMEventListener *listener, bool useCapture) { \
return _to RemoveEventListener(type, listener, useCapture); \
} \
NS_IMETHOD RemoveSystemEventListener(const nsAString & type, nsIDOMEventListener *listener, bool aUseCapture) { \
return _to RemoveSystemEventListener(type, listener, aUseCapture); \
} \
NS_IMETHOD DispatchEvent(nsIDOMEvent *evt, bool *_retval) { \
return _to DispatchEvent(evt, _retval); \
} \
virtual mozilla::dom::EventTarget* GetTargetForDOMEvent() { \
return _to GetTargetForDOMEvent(); \
} \
virtual mozilla::dom::EventTarget* GetTargetForEventTargetChain() { \
return _to GetTargetForEventTargetChain(); \
} \
virtual nsresult WillHandleEvent( \
mozilla::EventChainPostVisitor & aVisitor) { \
return _to WillHandleEvent(aVisitor); \
} \
virtual nsresult PostHandleEvent( \
mozilla::EventChainPostVisitor & aVisitor) { \
return _to PostHandleEvent(aVisitor); \
} \
virtual nsresult DispatchDOMEvent(mozilla::WidgetEvent* aEvent, nsIDOMEvent* aDOMEvent, nsPresContext* aPresContext, nsEventStatus* aEventStatus) { \
return _to DispatchDOMEvent(aEvent, aDOMEvent, aPresContext, aEventStatus); \
} \
virtual mozilla::EventListenerManager* GetOrCreateListenerManager() { \
return _to GetOrCreateListenerManager(); \
} \
virtual mozilla::EventListenerManager* GetExistingListenerManager() const { \
return _to GetExistingListenerManager(); \
} \
virtual nsIScriptContext * GetContextForEventHandlers(nsresult *aRv) { \
return _to GetContextForEventHandlers(aRv); \
} \
virtual JSContext * GetJSContextForEventHandlers(void) { \
return _to GetJSContextForEventHandlers(); \
}
#define NS_REALLY_FORWARD_NSIDOMEVENTTARGET(_class) \
using _class::AddEventListener; \
using _class::RemoveEventListener; \
NS_FORWARD_NSIDOMEVENTTARGET(_class::) \
virtual mozilla::EventListenerManager* \
GetOrCreateListenerManager() override { \
return _class::GetOrCreateListenerManager(); \
} \
virtual mozilla::EventListenerManager* \
GetExistingListenerManager() const override { \
return _class::GetExistingListenerManager(); \
}
#endif // mozilla_DOMEventTargetHelper_h_