1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/file/MetadataHelper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,120 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.8 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef mozilla_dom_file_metadatahelper_h__
1.11 +#define mozilla_dom_file_metadatahelper_h__
1.12 +
1.13 +#include "mozilla/Attributes.h"
1.14 +#include "FileCommon.h"
1.15 +
1.16 +#include "nsIFileStreams.h"
1.17 +
1.18 +#include "AsyncHelper.h"
1.19 +#include "FileHelper.h"
1.20 +
1.21 +class nsIFileStream;
1.22 +
1.23 +BEGIN_FILE_NAMESPACE
1.24 +
1.25 +class MetadataHelper;
1.26 +
1.27 +class MetadataParameters MOZ_FINAL
1.28 +{
1.29 + friend class MetadataHelper;
1.30 +
1.31 +public:
1.32 + NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MetadataParameters)
1.33 +
1.34 + MetadataParameters(bool aSizeRequested, bool aLastModifiedRequested)
1.35 + : mSizeRequested(aSizeRequested)
1.36 + , mLastModifiedRequested(aLastModifiedRequested)
1.37 + {
1.38 + }
1.39 +
1.40 + bool
1.41 + IsConfigured() const
1.42 + {
1.43 + return mSizeRequested || mLastModifiedRequested;
1.44 + }
1.45 +
1.46 + bool
1.47 + SizeRequested() const
1.48 + {
1.49 + return mSizeRequested;
1.50 + }
1.51 +
1.52 + bool
1.53 + LastModifiedRequested() const
1.54 + {
1.55 + return mLastModifiedRequested;
1.56 + }
1.57 +
1.58 + uint64_t
1.59 + Size() const
1.60 + {
1.61 + return mSize;
1.62 + }
1.63 +
1.64 + int64_t
1.65 + LastModified() const
1.66 + {
1.67 + return mLastModified;
1.68 + }
1.69 +
1.70 +private:
1.71 + // Private destructor, to discourage deletion outside of Release():
1.72 + ~MetadataParameters()
1.73 + {
1.74 + }
1.75 +
1.76 + uint64_t mSize;
1.77 + int64_t mLastModified;
1.78 + bool mSizeRequested;
1.79 + bool mLastModifiedRequested;
1.80 +};
1.81 +
1.82 +class MetadataHelper : public FileHelper
1.83 +{
1.84 +public:
1.85 + MetadataHelper(LockedFile* aLockedFile,
1.86 + FileRequest* aFileRequest,
1.87 + MetadataParameters* aParams)
1.88 + : FileHelper(aLockedFile, aFileRequest),
1.89 + mParams(aParams)
1.90 + { }
1.91 +
1.92 + nsresult
1.93 + DoAsyncRun(nsISupports* aStream) MOZ_OVERRIDE;
1.94 +
1.95 + nsresult
1.96 + GetSuccessResult(JSContext* aCx,
1.97 + JS::MutableHandle<JS::Value> aVal) MOZ_OVERRIDE;
1.98 +
1.99 +protected:
1.100 + class AsyncMetadataGetter : public AsyncHelper
1.101 + {
1.102 + public:
1.103 + AsyncMetadataGetter(nsISupports* aStream, MetadataParameters* aParams,
1.104 + bool aReadWrite)
1.105 + : AsyncHelper(aStream),
1.106 + mParams(aParams), mReadWrite(aReadWrite)
1.107 + { }
1.108 +
1.109 + protected:
1.110 + nsresult
1.111 + DoStreamWork(nsISupports* aStream) MOZ_OVERRIDE;
1.112 +
1.113 + private:
1.114 + nsRefPtr<MetadataParameters> mParams;
1.115 + bool mReadWrite;
1.116 + };
1.117 +
1.118 + nsRefPtr<MetadataParameters> mParams;
1.119 +};
1.120 +
1.121 +END_FILE_NAMESPACE
1.122 +
1.123 +#endif // mozilla_dom_file_metadatahelper_h__
