private string ConvertEquationImpl(byte[] equationRawBytes)
{
MTAPI_DIMS dims = new MTAPI_DIMS();
var resultStringBuilder = new StringBuilder(INITIAL_RESULT_BUFFER_SIZE);
var success = false;
while (!success)
{
if (resultStringBuilder.Capacity > MAX_RESULT_BUFFER_SIZE)
{
throw new Exception("Could not convert due high memory usage");
}
int result;
try
{
result = Api.MTXFormEqnMgn(
MTXFormEqn.mtxfmLOCAL,
MTXFormEqn.mtxfmMTEF,
equationRawBytes,
equationRawBytes.Length,
MTXFormEqn.mtxfmLOCAL,
MTXFormEqn.mtxfmTEXT,
resultStringBuilder,
resultStringBuilder.Capacity,
string.Empty,
ref dims
);
}
catch (AccessViolationException e)
{
throw new Exception("Access violation exception while FormEqn." + e.ToString());
}
success = MathTypeReturnValue.mtOK == result;
if (MathTypeReturnValue.mtMEMORY == result)
{
resultStringBuilder.Clear();
resultStringBuilder.Capacity *= 2; // retry with increased buffer
}
else if (MathTypeReturnValue.mtTRANSLATOR_ERROR == result)
{
throw new Exception("mtTRANSLATOR_ERROR. Result eq: " + resultStringBuilder.ToString());
}
else if (!success)
{
throw new Exception("MathType returned: " + result);
}
}
return(resultStringBuilder.ToString());
}
protected bool ConvertToOutput()
{
bool bResult = false;
//try
//{
if (!m_sdk.Init())
{
return(false);
}
if (MathTypeSDK.Instance.MTXFormResetMgn() == MathTypeReturnValue.mtOK &&
SetTranslator())
{
Int32 stat = 0;
Int32 iBufferLength = 5000;
StringBuilder strDest = new StringBuilder(iBufferLength);
MTAPI_DIMS dims = new MTAPI_DIMS();
// convert
stat = MathTypeSDK.Instance.MTXFormEqnMgn(
m_ei.iType,
m_ei.iFormat,
m_ei.bMTEF,
m_ei.iMTEF_Length,
m_eo.iType,
m_eo.iFormat,
strDest,
iBufferLength,
m_eo.strFileName,
ref dims);
// save equation
if (stat == MathTypeReturnValue.mtOK)
{
m_eo.strEquation = strDest.ToString();
bResult = true;
}
}
m_sdk.DeInit();
// }
// catch (Exception e)
// {
// Console.WriteLine(e.Message);
// return false;
// }
return(bResult);
}
/// <summary>
/// Transforms an equation (uses options specified via MTXFormAddVarSub,
/// MTXFormSetTranslator, and MTXFormSetPrefs).
/// </summary>
/// <param name="sender">Parameter not used</param>
/// <param name="e">Parameter not used</param>
private void FormEqn_Click(object sender, EventArgs e)
{
long retVal = 0;
string error;
if (_isMTAPIConnected == false)
{
InternalStartAPI(true);
}
if (_isMTAPIConnected == true)
{
string srcString = "MathType!MTEF!2!1!+-feaaguart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-xfr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaG4naiabgUcaRiaadIhaaaa!3892!";
string srcPath = @"";
const int iDstLen = 10000;
StringBuilder strDest = new StringBuilder(iDstLen);
MTAPI_DIMS dims = new MTAPI_DIMS();
/* IntPtr ptr = Marshal.AllocHGlobal(1024);
* int length = srcString.Length;
* length = 2 * (length + 1);
* IntPtr srcData = Marshal.AllocHGlobal(length);
* Marshal.Copy(srcString.ToCharArray(), 0, srcData, srcString.Length);*/
byte[] srcData = System.Text.Encoding.ASCII.GetBytes(srcString);
retVal = _MTSDK.MTXFormEqnMgn(mtxFormEqn.mtxfmLOCAL,
mtxFormEqn.mtxfmMTEF,
srcData,
srcString.Length,
mtxFormEqn.mtxfmLOCAL,
mtxFormEqn.mtxfmTEXT,
strDest,
iDstLen,
srcPath,
ref dims);
if (retVal == mtReturnValues.mtOK)
{
error = "Equation transformation was successful";
_appHelper.ShowOKDialog(error);
}
else if (retVal == mtReturnValues.mtNOT_EQUATION)
{
error = "Error: Source data does not contain MTEF";
_appHelper.ShowErrorDialog(error);
}
else if (retVal == mtReturnValues.mtSUBSTITUTION_ERROR)
{
error = "Error: Could not perform one or more rules";
_appHelper.ShowErrorDialog(error);
}
else if (retVal == mtReturnValues.mtTRANSLATOR_ERROR)
{
error = "Error: Errors occured during translation (translation not done)";
_appHelper.ShowErrorDialog(error);
}
else if (retVal == mtReturnValues.mtPREFERENCE_ERROR)
{
error = "Error: Could not set preferences";
_appHelper.ShowErrorDialog(error);
}
else if (retVal == mtReturnValues.mtMEMORY)
{
error = "Error: Not enough space in dstData";
_appHelper.ShowErrorDialog(error);
}
else
{
error = "Error: Some other error occurred";
_appHelper.ShowErrorDialog(error);
}
// Free memory allocated from hglobal allocation
// Marshal.FreeHGlobal(srcData);
}
}
