michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_dom_file_metadatahelper_h__
michael@0: #define mozilla_dom_file_metadatahelper_h__
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "FileCommon.h"
michael@0: 
michael@0: #include "nsIFileStreams.h"
michael@0: 
michael@0: #include "AsyncHelper.h"
michael@0: #include "FileHelper.h"
michael@0: 
michael@0: class nsIFileStream;
michael@0: 
michael@0: BEGIN_FILE_NAMESPACE
michael@0: 
michael@0: class MetadataHelper;
michael@0: 
michael@0: class MetadataParameters MOZ_FINAL
michael@0: {
michael@0:   friend class MetadataHelper;
michael@0: 
michael@0: public:
michael@0:   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MetadataParameters)
michael@0: 
michael@0:   MetadataParameters(bool aSizeRequested, bool aLastModifiedRequested)
michael@0:     : mSizeRequested(aSizeRequested)
michael@0:     , mLastModifiedRequested(aLastModifiedRequested)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   bool
michael@0:   IsConfigured() const
michael@0:   {
michael@0:     return mSizeRequested || mLastModifiedRequested;
michael@0:   }
michael@0: 
michael@0:   bool
michael@0:   SizeRequested() const
michael@0:   {
michael@0:     return mSizeRequested;
michael@0:   }
michael@0: 
michael@0:   bool
michael@0:   LastModifiedRequested() const
michael@0:   {
michael@0:     return mLastModifiedRequested;
michael@0:   }
michael@0: 
michael@0:   uint64_t
michael@0:   Size() const
michael@0:   {
michael@0:     return mSize;
michael@0:   }
michael@0: 
michael@0:   int64_t
michael@0:   LastModified() const
michael@0:   {
michael@0:     return mLastModified;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   // Private destructor, to discourage deletion outside of Release():
michael@0:   ~MetadataParameters()
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   uint64_t mSize;
michael@0:   int64_t mLastModified;
michael@0:   bool mSizeRequested;
michael@0:   bool mLastModifiedRequested;
michael@0: };
michael@0: 
michael@0: class MetadataHelper : public FileHelper
michael@0: {
michael@0: public:
michael@0:   MetadataHelper(LockedFile* aLockedFile,
michael@0:                  FileRequest* aFileRequest,
michael@0:                  MetadataParameters* aParams)
michael@0:   : FileHelper(aLockedFile, aFileRequest),
michael@0:     mParams(aParams)
michael@0:   { }
michael@0: 
michael@0:   nsresult
michael@0:   DoAsyncRun(nsISupports* aStream) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsresult
michael@0:   GetSuccessResult(JSContext* aCx,
michael@0:                    JS::MutableHandle<JS::Value> aVal) MOZ_OVERRIDE;
michael@0: 
michael@0: protected:
michael@0:   class AsyncMetadataGetter : public AsyncHelper
michael@0:   {
michael@0:   public:
michael@0:     AsyncMetadataGetter(nsISupports* aStream, MetadataParameters* aParams,
michael@0:                         bool aReadWrite)
michael@0:     : AsyncHelper(aStream),
michael@0:       mParams(aParams), mReadWrite(aReadWrite)
michael@0:     { }
michael@0: 
michael@0:   protected:
michael@0:     nsresult
michael@0:     DoStreamWork(nsISupports* aStream) MOZ_OVERRIDE;
michael@0: 
michael@0:   private:
michael@0:     nsRefPtr<MetadataParameters> mParams;
michael@0:     bool mReadWrite;
michael@0:   };
michael@0: 
michael@0:   nsRefPtr<MetadataParameters> mParams;
michael@0: };
michael@0: 
michael@0: END_FILE_NAMESPACE
michael@0: 
michael@0: #endif // mozilla_dom_file_metadatahelper_h__