Add m-esr52 at 52.6.0

1 files changed, 140 insertions, 0 deletions

diff --git a/dom/xul/nsXULPrototypeCache.h b/dom/xul/nsXULPrototypeCache.h
new file mode 100644
index 000000000..f191c57ed
--- /dev/null
+++ b/dom/xul/nsXULPrototypeCache.h
@@ -0,0 +1,140 @@
+/* -*- 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/. */
+
+#ifndef nsXULPrototypeCache_h__
+#define nsXULPrototypeCache_h__
+
+#include "nsCOMPtr.h"
+#include "nsIObserver.h"
+#include "nsXBLDocumentInfo.h"
+#include "nsJSThingHashtable.h"
+#include "nsInterfaceHashtable.h"
+#include "nsRefPtrHashtable.h"
+#include "nsURIHashKey.h"
+#include "nsXULPrototypeDocument.h"
+#include "nsIInputStream.h"
+#include "nsIStorageStream.h"
+
+#include "mozilla/scache/StartupCache.h"
+
+namespace mozilla {
+class CSSStyleSheet;
+} // namespace mozilla
+
+/**
+ * The XUL prototype cache can be used to store and retrieve shared data for
+ * XUL documents, style sheets, XBL, and scripts.
+ *
+ * The cache has two levels:
+ *  1. In-memory hashtables
+ *  2. The on-disk cache file.
+ */
+class nsXULPrototypeCache : public nsIObserver
+{
+public:
+    // nsISupports
+    NS_DECL_THREADSAFE_ISUPPORTS
+    NS_DECL_NSIOBSERVER
+
+    bool IsCached(nsIURI* aURI) {
+        return GetPrototype(aURI) != nullptr;
+    }
+    void AbortCaching();
+
+
+    /**
+     * Whether the prototype cache is enabled.
+     */
+    bool IsEnabled();
+
+    /**
+     * Flush the cache; remove all XUL prototype documents, style
+     * sheets, and scripts.
+     */
+    void Flush();
+
+
+    // The following methods are used to put and retrive various items into and
+    // from the cache.
+
+    nsXULPrototypeDocument* GetPrototype(nsIURI* aURI);
+    nsresult PutPrototype(nsXULPrototypeDocument* aDocument);
+
+    JSScript* GetScript(nsIURI* aURI);
+    nsresult PutScript(nsIURI* aURI, JS::Handle<JSScript*> aScriptObject);
+
+    nsXBLDocumentInfo* GetXBLDocumentInfo(nsIURI* aURL) {
+        return mXBLDocTable.GetWeak(aURL);
+    }
+    nsresult PutXBLDocumentInfo(nsXBLDocumentInfo* aDocumentInfo);
+
+    /**
+     * Get a style sheet by URI. If the style sheet is not in the cache,
+     * returns nullptr.
+     */
+    mozilla::CSSStyleSheet* GetStyleSheet(nsIURI* aURI) {
+        return mStyleSheetTable.GetWeak(aURI);
+    }
+
+    /**
+     * Store a style sheet in the cache. The key, style sheet's URI is obtained
+     * from the style sheet itself.
+     */
+    nsresult PutStyleSheet(mozilla::CSSStyleSheet* aStyleSheet);
+
+    /**
+     * Write the XUL prototype document to a cache file. The proto must be
+     * fully loaded.
+     */
+    nsresult WritePrototype(nsXULPrototypeDocument* aPrototypeDocument);
+
+    /**
+     * This interface allows partial reads and writes from the buffers in the
+     * startupCache.
+     */
+    nsresult GetInputStream(nsIURI* aURI, nsIObjectInputStream** objectInput);
+    nsresult FinishInputStream(nsIURI* aURI);
+    nsresult GetOutputStream(nsIURI* aURI, nsIObjectOutputStream** objectOutput);
+    nsresult FinishOutputStream(nsIURI* aURI);
+    nsresult HasData(nsIURI* aURI, bool* exists);
+
+    static nsXULPrototypeCache* GetInstance();
+    static nsXULPrototypeCache* MaybeGetInstance() { return sInstance; }
+
+    static void ReleaseGlobals()
+    {
+        NS_IF_RELEASE(sInstance);
+    }
+
+    void MarkInCCGeneration(uint32_t aGeneration);
+    void MarkInGC(JSTracer* aTrc);
+    void FlushScripts();
+protected:
+    friend nsresult
+    NS_NewXULPrototypeCache(nsISupports* aOuter, REFNSIID aIID, void** aResult);
+
+    nsXULPrototypeCache();
+    virtual ~nsXULPrototypeCache();
+
+    static nsXULPrototypeCache* sInstance;
+
+    void FlushSkinFiles();
+
+    nsRefPtrHashtable<nsURIHashKey,nsXULPrototypeDocument>   mPrototypeTable; // owns the prototypes
+    nsRefPtrHashtable<nsURIHashKey,mozilla::CSSStyleSheet>   mStyleSheetTable;
+    nsJSThingHashtable<nsURIHashKey, JSScript*>              mScriptTable;
+    nsRefPtrHashtable<nsURIHashKey,nsXBLDocumentInfo>        mXBLDocTable;
+
+    // URIs already written to the startup cache, to prevent double-caching.
+    nsTHashtable<nsURIHashKey>                               mStartupCacheURITable;
+
+    nsInterfaceHashtable<nsURIHashKey, nsIStorageStream>     mOutputStreamTable;
+    nsInterfaceHashtable<nsURIHashKey, nsIObjectInputStream> mInputStreamTable;
+
+    // Bootstrap caching service
+    nsresult BeginCaching(nsIURI* aDocumentURI);
+};
+
+#endif // nsXULPrototypeCache_h__