// Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//

#ifndef CEF_INCLUDE_CEF_STREAM_H_
#define CEF_INCLUDE_CEF_STREAM_H_

#include "include/cef_base.h"

///
// Interface the client can implement to provide a custom stream reader. The
// methods of this class may be called on any thread.
///
/*--cef(source=client)--*/
class CefReadHandler : public virtual CefBaseRefCounted {
 public:
 ///
 // Read raw binary data.
 ///
 /*--cef()--*/
 virtual size_t Read(void* ptr, size_t size, size_t n) = 0;

 ///
 // Seek to the specified offset position. |whence| may be any one of
 // SEEK_CUR, SEEK_END or SEEK_SET. Return zero on success and non-zero on
 // failure.
 ///
 /*--cef()--*/
 virtual int Seek(int64 offset, int whence) = 0;

 ///
 // Return the current offset position.
 ///
 /*--cef()--*/
 virtual int64 Tell() = 0;

 ///
 // Return non-zero if at end of file.
 ///
 /*--cef()--*/
 virtual int Eof() = 0;

 ///
 // Return true if this handler performs work like accessing the file system
 // which may block. Used as a hint for determining the thread to access the
 // handler from.
 ///
 /*--cef()--*/
 virtual bool MayBlock() = 0;
};

///
// Class used to read data from a stream. The methods of this class may be
// called on any thread.
///
/*--cef(source=library)--*/
class CefStreamReader : public virtual CefBaseRefCounted {
 public:
 ///
 // Create a new CefStreamReader object from a file.
 ///
 /*--cef()--*/
 static CefRefPtr<CefStreamReader> CreateForFile(const CefString& fileName);
 ///
 // Create a new CefStreamReader object from data.
 ///
 /*--cef()--*/
 static CefRefPtr<CefStreamReader> CreateForData(void* data, size_t size);
 ///
 // Create a new CefStreamReader object from a custom handler.
 ///
 /*--cef()--*/
 static CefRefPtr<CefStreamReader> CreateForHandler(
 CefRefPtr<CefReadHandler> handler);

 ///
 // Read raw binary data.
 ///
 /*--cef()--*/
 virtual size_t Read(void* ptr, size_t size, size_t n) = 0;

 ///
 // Seek to the specified offset position. |whence| may be any one of
 // SEEK_CUR, SEEK_END or SEEK_SET. Returns zero on success and non-zero on
 // failure.
 ///
 /*--cef()--*/
 virtual int Seek(int64 offset, int whence) = 0;

 ///
 // Return the current offset position.
 ///
 /*--cef()--*/
 virtual int64 Tell() = 0;

 ///
 // Return non-zero if at end of file.
 ///
 /*--cef()--*/
 virtual int Eof() = 0;

 ///
 // Returns true if this reader performs work like accessing the file system
 // which may block. Used as a hint for determining the thread to access the
 // reader from.
 ///
 /*--cef()--*/
 virtual bool MayBlock() = 0;
};

///
// Interface the client can implement to provide a custom stream writer. The
// methods of this class may be called on any thread.
///
/*--cef(source=client)--*/
class CefWriteHandler : public virtual CefBaseRefCounted {
 public:
 ///
 // Write raw binary data.
 ///
 /*--cef()--*/
 virtual size_t Write(const void* ptr, size_t size, size_t n) = 0;

 ///
 // Seek to the specified offset position. |whence| may be any one of
 // SEEK_CUR, SEEK_END or SEEK_SET. Return zero on success and non-zero on
 // failure.
 ///
 /*--cef()--*/
 virtual int Seek(int64 offset, int whence) = 0;

 ///
 // Return the current offset position.
 ///
 /*--cef()--*/
 virtual int64 Tell() = 0;

 ///
 // Flush the stream.
 ///
 /*--cef()--*/
 virtual int Flush() = 0;

 ///
 // Return true if this handler performs work like accessing the file system
 // which may block. Used as a hint for determining the thread to access the
 // handler from.
 ///
 /*--cef()--*/
 virtual bool MayBlock() = 0;
};

///
// Class used to write data to a stream. The methods of this class may be called
// on any thread.
///
/*--cef(source=library)--*/
class CefStreamWriter : public virtual CefBaseRefCounted {
 public:
 ///
 // Create a new CefStreamWriter object for a file.
 ///
 /*--cef()--*/
 static CefRefPtr<CefStreamWriter> CreateForFile(const CefString& fileName);
 ///
 // Create a new CefStreamWriter object for a custom handler.
 ///
 /*--cef()--*/
 static CefRefPtr<CefStreamWriter> CreateForHandler(
 CefRefPtr<CefWriteHandler> handler);

 ///
 // Write raw binary data.
 ///
 /*--cef()--*/
 virtual size_t Write(const void* ptr, size_t size, size_t n) = 0;

 ///
 // Seek to the specified offset position. |whence| may be any one of
 // SEEK_CUR, SEEK_END or SEEK_SET. Returns zero on success and non-zero on
 // failure.
 ///
 /*--cef()--*/
 virtual int Seek(int64 offset, int whence) = 0;

 ///
 // Return the current offset position.
 ///
 /*--cef()--*/
 virtual int64 Tell() = 0;

 ///
 // Flush the stream.
 ///
 /*--cef()--*/
 virtual int Flush() = 0;

 ///
 // Returns true if this writer performs work like accessing the file system
 // which may block. Used as a hint for determining the thread to access the
 // writer from.
 ///
 /*--cef()--*/
 virtual bool MayBlock() = 0;
};

#endif // CEF_INCLUDE_CEF_STREAM_H_