gecko-dev/widget/nsPrimitiveHelpers.h
2015-05-02 03:01:06 +12:00

66 lines
2.9 KiB
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"
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 char* aFlavor, 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 char* aFlavor, nsISupports* aPrimitive,
void** aDataBuff, uint32_t aDataLen ) ;
// Given a unicode buffer (flavor text/unicode), this converts it to plain text using
// the appropriate platform charset encoding. |inUnicodeLen| is the length of the input
// string, not the # of bytes in the buffer. |outPlainTextData| is null terminated,
// but its length parameter, |outPlainTextLen|, does not reflect that.
static nsresult ConvertUnicodeToPlatformPlainText ( char16_t* inUnicode, int32_t inUnicodeLen,
char** outPlainTextData, int32_t* outPlainTextLen ) ;
// Given a char buffer (flavor text/plaikn), this converts it to unicode using
// the appropriate platform charset encoding. |outUnicode| is null terminated,
// but its length parameter, |outUnicodeLen|, does not reflect that. |outUnicodeLen| is
// the length of the string in characters, not bytes.
static nsresult ConvertPlatformPlainTextToUnicode ( const char* inText, int32_t inTextLen,
char16_t** outUnicode, int32_t* outUnicodeLen ) ;
}; // 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 ( const char* inFlavor, void** ioData, int32_t* ioLengthInBytes ) ;
}; // class nsLinebreakHelpers
#endif // nsPrimitiveHelpers_h___