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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/. */
+
+#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<bool> 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<DocAccessibleParent*>* 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<nsPtrHashKey<const dom::Document>, DocAccessible>
+ DocAccessibleHashtable;
+ DocAccessibleHashtable mDocAccessibleCache;
+
+ typedef nsRefPtrHashtable<nsPtrHashKey<const DocAccessible>,
+ xpcAccessibleDocument>
+ XPCDocumentHashtable;
+ XPCDocumentHashtable mXPCDocumentCache;
+ static StaticAutoPtr<nsRefPtrHashtable<
+ nsPtrHashKey<const DocAccessibleParent>, xpcAccessibleDocument>>
+ sRemoteXPCDocumentCache;
+
+ /*
+ * The list of remote top level documents.
+ */
+ static StaticAutoPtr<nsTArray<DocAccessibleParent*>> 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_