import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

xpfe/components/windowds/nsWindowDataSource.h

@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+#include "nsIRDFDataSource.h"
+#include "nsIWindowMediatorListener.h"
+#include "nsIWindowDataSource.h"
+#include "nsIObserver.h"
+
+#include "nsHashKeys.h"
+#include "nsIRDFService.h"
+#include "nsIRDFContainer.h"
+#include "nsInterfaceHashtable.h"
+#include "nsCycleCollectionParticipant.h"
+
+// {C744CA3D-840B-460a-8D70-7CE63C51C958}
+#define NS_WINDOWDATASOURCE_CID \
+{ 0xc744ca3d, 0x840b, 0x460a, \
+ { 0x8d, 0x70, 0x7c, 0xe6, 0x3c, 0x51, 0xc9, 0x58 } }
+
+
+class nsWindowDataSource final : public nsIRDFDataSource,
+                                 public nsIObserver,
+                                 public nsIWindowMediatorListener,
+                                 public nsIWindowDataSource
+{
+ public:
+    nsWindowDataSource() { }
+
+    nsresult Init();
+
+    NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+    NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsWindowDataSource,
+                                             nsIRDFDataSource)
+    NS_DECL_NSIOBSERVER
+    NS_DECL_NSIWINDOWMEDIATORLISTENER
+    NS_DECL_NSIWINDOWDATASOURCE
+    NS_DECL_NSIRDFDATASOURCE
+
+ protected:
+    virtual ~nsWindowDataSource();
+
+ private:
+
+    // mapping of window -> RDF resource
+    nsInterfaceHashtable<nsPtrHashKey<nsIXULWindow>, nsIRDFResource> mWindowResources;
+
+    static uint32_t windowCount;
+    static uint32_t gRefCnt;
+
+    nsCOMPtr<nsIRDFDataSource> mInner;
+    nsCOMPtr<nsIRDFContainer> mContainer;
+
+    static nsIRDFResource* kNC_Name;
+    static nsIRDFResource* kNC_KeyIndex;
+    static nsIRDFResource* kNC_WindowRoot;
+    static nsIRDFService* gRDFService;
+};