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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /dom/events/DOMEventTargetHelper.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/events/DOMEventTargetHelper.h')
-rw-r--r--dom/events/DOMEventTargetHelper.h168
1 files changed, 168 insertions, 0 deletions
diff --git a/dom/events/DOMEventTargetHelper.h b/dom/events/DOMEventTargetHelper.h
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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: */
+/* 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/. */
+
+#ifndef mozilla_DOMEventTargetHelper_h_
+#define mozilla_DOMEventTargetHelper_h_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/EventTarget.h"
+#include "mozilla/GlobalTeardownObserver.h"
+#include "mozilla/LinkedList.h"
+#include "mozilla/RefPtr.h"
+#include "nsAtom.h"
+#include "nsCOMPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsDebug.h"
+#include "nsGkAtoms.h"
+#include "nsID.h"
+#include "nsIGlobalObject.h"
+#include "nsIScriptGlobalObject.h"
+#include "nsISupports.h"
+#include "nsISupportsUtils.h"
+#include "nsPIDOMWindow.h"
+#include "nsStringFwd.h"
+#include "nsTArray.h"
+
+class nsCycleCollectionTraversalCallback;
+
+namespace mozilla {
+
+class ErrorResult;
+class EventChainPostVisitor;
+class EventChainPreVisitor;
+class EventListenerManager;
+
+namespace dom {
+class Document;
+class Event;
+enum class CallerType : uint32_t;
+} // namespace dom
+
+#define NS_DOMEVENTTARGETHELPER_IID \
+ { \
+ 0xa28385c6, 0x9451, 0x4d7e, { \
+ 0xa3, 0xdd, 0xf4, 0xb6, 0x87, 0x2f, 0xa4, 0x76 \
+ } \
+ }
+
+class DOMEventTargetHelper : public dom::EventTarget,
+ public GlobalTeardownObserver {
+ public:
+ DOMEventTargetHelper();
+ explicit DOMEventTargetHelper(nsPIDOMWindowInner* aWindow);
+ explicit DOMEventTargetHelper(nsIGlobalObject* aGlobalObject);
+ explicit DOMEventTargetHelper(DOMEventTargetHelper* aOther);
+
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_IMETHOD_(void) DeleteCycleCollectable() override;
+ NS_DECL_CYCLE_COLLECTION_SKIPPABLE_WRAPPERCACHE_CLASS_AMBIGUOUS(
+ DOMEventTargetHelper, dom::EventTarget)
+
+ virtual EventListenerManager* GetExistingListenerManager() const override;
+ virtual EventListenerManager* GetOrCreateListenerManager() override;
+
+ bool ComputeDefaultWantsUntrusted(ErrorResult& aRv) override;
+
+ using EventTarget::DispatchEvent;
+ // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY bool DispatchEvent(dom::Event& aEvent,
+ dom::CallerType aCallerType,
+ ErrorResult& aRv) override;
+
+ void GetEventTargetParent(EventChainPreVisitor& aVisitor) override;
+
+ nsresult PostHandleEvent(EventChainPostVisitor& aVisitor) override;
+
+ NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOMEVENTTARGETHELPER_IID)
+
+ nsIGlobalObject* GetOwnerGlobal() const override {
+ return GlobalTeardownObserver::GetOwnerGlobal();
+ }
+
+ 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) const;
+
+ bool HasListenersFor(nsAtom* aTypeWithOn) const;
+
+ virtual nsPIDOMWindowOuter* GetOwnerGlobalForBindingsInternal() override {
+ return nsPIDOMWindowOuter::GetFromCurrentInner(GetOwner());
+ }
+
+ // 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.
+ mozilla::dom::Document* GetDocumentIfCurrent() const;
+
+ void DisconnectFromOwner() override;
+ using EventTarget::GetParentObject;
+
+ virtual void EventListenerAdded(nsAtom* aType) override;
+
+ virtual void EventListenerRemoved(nsAtom* aType) override;
+
+ // Dispatch a trusted, non-cancellable and non-bubbling event to |this|.
+ nsresult DispatchTrustedEvent(const nsAString& aEventName);
+
+ protected:
+ virtual ~DOMEventTargetHelper();
+
+ nsresult WantsUntrusted(bool* aRetVal);
+
+ void MaybeUpdateKeepAlive();
+ void MaybeDontKeepAlive();
+
+ // 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 mIsKeptAlive; }
+
+ RefPtr<EventListenerManager> mListenerManager;
+ // Make |event| trusted and dispatch |aEvent| to |this|.
+ nsresult DispatchTrustedEvent(dom::Event* aEvent);
+
+ virtual void LastRelease() {}
+
+ void KeepAliveIfHasListenersFor(nsAtom* aType);
+
+ void IgnoreKeepAliveIfHasListenersFor(nsAtom* aType);
+
+ private:
+ nsTArray<RefPtr<nsAtom>> mKeepingAliveTypes;
+
+ bool mIsKeptAlive = false;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(DOMEventTargetHelper, NS_DOMEVENTTARGETHELPER_IID)
+
+} // namespace mozilla
+
+// WebIDL event handlers
+#define IMPL_EVENT_HANDLER(_event) \
+ inline mozilla::dom::EventHandlerNonNull* GetOn##_event() { \
+ return GetEventHandler(nsGkAtoms::on##_event); \
+ } \
+ inline void SetOn##_event(mozilla::dom::EventHandlerNonNull* aCallback) { \
+ SetEventHandler(nsGkAtoms::on##_event, aCallback); \
+ }
+
+#endif // mozilla_DOMEventTargetHelper_h_