зеркало из https://github.com/mozilla/gecko-dev.git
119 строки
2.4 KiB
C++
119 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_MetadataHelper_h
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#define mozilla_dom_MetadataHelper_h
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#include "FileHelper.h"
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#include "js/TypeDecls.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/dom/AsyncHelper.h"
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#include "nsAutoPtr.h"
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namespace mozilla {
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namespace dom {
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class MetadataHelper;
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class MetadataParameters final
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{
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friend class MetadataHelper;
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MetadataParameters)
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MetadataParameters(bool aSizeRequested, bool aLastModifiedRequested)
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: mSizeRequested(aSizeRequested)
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, mLastModifiedRequested(aLastModifiedRequested)
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{
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}
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bool
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IsConfigured() const
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{
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return mSizeRequested || mLastModifiedRequested;
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}
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bool
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SizeRequested() const
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{
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return mSizeRequested;
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}
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bool
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LastModifiedRequested() const
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{
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return mLastModifiedRequested;
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}
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uint64_t
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Size() const
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{
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return mSize;
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}
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int64_t
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LastModified() const
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{
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return mLastModified;
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}
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private:
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// Private destructor, to discourage deletion outside of Release():
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~MetadataParameters()
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{
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}
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uint64_t mSize;
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int64_t mLastModified;
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bool mSizeRequested;
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bool mLastModifiedRequested;
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};
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class MetadataHelper : public FileHelper
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{
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public:
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MetadataHelper(FileHandleBase* aFileHandle,
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FileRequestBase* aFileRequest,
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MetadataParameters* aParams)
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: FileHelper(aFileHandle, aFileRequest),
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mParams(aParams)
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{ }
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nsresult
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DoAsyncRun(nsISupports* aStream) override;
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nsresult
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GetSuccessResult(JSContext* aCx,
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JS::MutableHandle<JS::Value> aVal) override;
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protected:
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class AsyncMetadataGetter : public AsyncHelper
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{
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public:
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AsyncMetadataGetter(nsISupports* aStream, MetadataParameters* aParams,
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bool aReadWrite)
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: AsyncHelper(aStream),
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mParams(aParams), mReadWrite(aReadWrite)
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{ }
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protected:
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nsresult
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DoStreamWork(nsISupports* aStream) override;
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private:
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nsRefPtr<MetadataParameters> mParams;
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bool mReadWrite;
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};
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nsRefPtr<MetadataParameters> mParams;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_MetadataHelper_h
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