Quelle nsPrimitiveHelpers.h Sprache: C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 nsPrimitiveHelpers_h___
#define nsPrimitiveHelpers_h___

#include "nsError.h"
#include "nscore.h"
#include "nsString.h"

class nsISupports;

class nsPrimitiveHelpers {
public:
  // Given some data and the flavor it corresponds to, creates the appropriate
  // nsISupports* wrapper for passing across IDL boundaries. The length
  // parameter should not include the null if the data is null terminated.
  static void CreatePrimitiveForData(const nsACString& aFlavor,
                                     const void* aDataBuff, uint32_t aDataLen,
                                     nsISupports** aPrimitive);

  // A specific case of CreatePrimitive for windows CF_HTML handling in
  // DataTransfer
  static void CreatePrimitiveForCFHTML(const void* aDataBuff,
                                       uint32_t* aDataLen,
                                       nsISupports** aPrimitive);

  // Given a nsISupports* primitive and the flavor it represents, creates a new
  // data buffer with the data in it. This data will be null terminated, but the
  // length parameter does not reflect that.
  static void CreateDataFromPrimitive(const nsACString& aFlavor,
                                      nsISupports* aPrimitive, void** aDataBuff,
                                      uint32_t* aDataLen);

};  // class nsPrimitiveHelpers

class nsLinebreakHelpers {
public:
  // Given some data, convert from the platform linebreaks into the LF expected
  // by the DOM. This will attempt to convert the data in place, but the buffer
  // may still need to be reallocated regardless (disposing the old buffer is
  // taken care of internally, see the note below).
  //
  // NOTE: this assumes that it can use 'free' to dispose of the old buffer.
  static nsresult ConvertPlatformToDOMLinebreaks(bool aIsSingleByteChars,
                                                 void** ioData,
                                                 int32_t* ioLengthInBytes);

};  // class nsLinebreakHelpers

#endif  // nsPrimitiveHelpers_h___

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