From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- accessible/base/DocManager.h | 193 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 accessible/base/DocManager.h (limited to 'accessible/base/DocManager.h') diff --git a/accessible/base/DocManager.h b/accessible/base/DocManager.h new file mode 100644 index 0000000000..94da5d0a24 --- /dev/null +++ b/accessible/base/DocManager.h @@ -0,0 +1,193 @@ +/* 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_a11_DocManager_h_ +#define mozilla_a11_DocManager_h_ + +#include "mozilla/ClearOnShutdown.h" +#include "nsIDOMEventListener.h" +#include "nsRefPtrHashtable.h" +#include "nsIWebProgressListener.h" +#include "nsWeakReference.h" +#include "mozilla/StaticPtr.h" +#include "nsINode.h" + +namespace mozilla::dom { +class Document; +} + +namespace mozilla { +class PresShell; + +namespace a11y { + +class LocalAccessible; +class DocAccessible; +class xpcAccessibleDocument; +class DocAccessibleParent; + +/** + * Manage the document accessible life cycle. + */ +class DocManager : public nsIWebProgressListener, + public nsIDOMEventListener, + public nsSupportsWeakReference { + public: + NS_DECL_THREADSAFE_ISUPPORTS + NS_DECL_NSIWEBPROGRESSLISTENER + NS_DECL_NSIDOMEVENTLISTENER + + /** + * Return document accessible for the given DOM node. + */ + DocAccessible* GetDocAccessible(dom::Document* aDocument); + + /** + * Return document accessible for the given presshell. + */ + DocAccessible* GetDocAccessible(const PresShell* aPresShell); + + /** + * Search through all document accessibles for an accessible with the given + * unique id. + */ + LocalAccessible* FindAccessibleInCache(nsINode* aNode) const; + + /** + * Called by document accessible when it gets shutdown. + * @param aAllowServiceShutdown true to shut down nsAccessibilityService + * if it is no longer required, false to prevent it. + */ + void NotifyOfDocumentShutdown(DocAccessible* aDocument, + dom::Document* aDOMDocument, + bool aAllowServiceShutdown = true); + + void RemoveFromXPCDocumentCache(DocAccessible* aDocument, + bool aAllowServiceShutdown = true); + + /** + * Return XPCOM accessible document. + */ + xpcAccessibleDocument* GetXPCDocument(DocAccessible* aDocument); + xpcAccessibleDocument* GetCachedXPCDocument(DocAccessible* aDocument) const { + return mXPCDocumentCache.GetWeak(aDocument); + } + + /* + * Notification that a top level document in a content process has gone away. + */ + static void RemoteDocShutdown(DocAccessibleParent* aDoc) { + DebugOnly result = sRemoteDocuments->RemoveElement(aDoc); + MOZ_ASSERT(result, "Why didn't we find the document!"); + } + + /* + * Notify of a new top level document in a content process. + */ + static void RemoteDocAdded(DocAccessibleParent* aDoc); + + static const nsTArray* TopLevelRemoteDocs() { + return sRemoteDocuments; + } + + /** + * Remove the xpc document for a remote document if there is one. + */ + static void NotifyOfRemoteDocShutdown(DocAccessibleParent* adoc); + + static void RemoveFromRemoteXPCDocumentCache(DocAccessibleParent* aDoc); + + /** + * Get a XPC document for a remote document. + */ + static xpcAccessibleDocument* GetXPCDocument(DocAccessibleParent* aDoc); + static xpcAccessibleDocument* GetCachedXPCDocument( + const DocAccessibleParent* aDoc) { + return sRemoteXPCDocumentCache ? sRemoteXPCDocumentCache->GetWeak(aDoc) + : nullptr; + } + +#ifdef DEBUG + bool IsProcessingRefreshDriverNotification() const; +#endif + + protected: + DocManager(); + virtual ~DocManager() = default; + + /** + * Initialize the manager. + */ + bool Init(); + + /** + * Shutdown the manager. + */ + void Shutdown(); + + bool HasXPCDocuments() { + return mXPCDocumentCache.Count() > 0 || + (sRemoteXPCDocumentCache && sRemoteXPCDocumentCache->Count() > 0); + } + + private: + DocManager(const DocManager&); + DocManager& operator=(const DocManager&); + + private: + /** + * Create an accessible document if it was't created and fire accessibility + * events if needed. + * + * @param aDocument [in] loaded DOM document + * @param aLoadEventType [in] specifies the event type to fire load event, + * if 0 then no event is fired + */ + void HandleDOMDocumentLoad(dom::Document* aDocument, uint32_t aLoadEventType); + + /** + * Add/remove 'pagehide' and 'DOMContentLoaded' event listeners. + */ + void AddListeners(dom::Document* aDocument, bool aAddPageShowListener); + void RemoveListeners(dom::Document* aDocument); + + /** + * Create document or root accessible. + */ + DocAccessible* CreateDocOrRootAccessible(dom::Document* aDocument); + + /** + * Clear the cache and shutdown the document accessibles. + */ + void ClearDocCache(); + + typedef nsRefPtrHashtable, DocAccessible> + DocAccessibleHashtable; + DocAccessibleHashtable mDocAccessibleCache; + + typedef nsRefPtrHashtable, + xpcAccessibleDocument> + XPCDocumentHashtable; + XPCDocumentHashtable mXPCDocumentCache; + static StaticAutoPtr, xpcAccessibleDocument>> + sRemoteXPCDocumentCache; + + /* + * The list of remote top level documents. + */ + static StaticAutoPtr> sRemoteDocuments; +}; + +/** + * Return the existing document accessible for the document if any. + * Note this returns the doc accessible for the primary pres shell if there is + * more than one. + */ +DocAccessible* GetExistingDocAccessible(const dom::Document* aDocument); + +} // namespace a11y +} // namespace mozilla + +#endif // mozilla_a11_DocManager_h_ -- cgit v1.2.3