/// <summary>
/// Calculate a Hash for a DataView and the calculates the size of the DataView, too.
/// </summary>
/// <remarks><em>Do not use for creation of a password hash</em> - this Method uses the SHA1 algorithm
/// for speed reasons but this is not deemed safe enough for password hashing! --> Use
/// PasswordHelper.GetPasswordHash() for this instead!!!</remarks>
/// <param name="AHashDV">The DataView to be analysed.</param>
/// <param name="AHash">Returns the Hash value of the DataView.</param>
/// <param name="ASize">Returns the size of the DataView.</param>
public static void CalculateHashAndSize(DataView AHashDV, out String AHash, out Int32 ASize)
{
StringBuilder HashStringBuilder;
SHA1CryptoServiceProvider HashingProvider;
Int32 RowCounter;
Int32 ColumnCounter;
Int32 TmpSize = 0;
ASize = 0;
/*
* Build a string that contains all values of all rows in the DataView, using
* a StringBuilder for efficiency.
*/
HashStringBuilder = new StringBuilder();
for (RowCounter = 0; RowCounter <= AHashDV.Count - 1; RowCounter += 1)
{
for (ColumnCounter = 0; ColumnCounter <= AHashDV.Table.Columns.Count - 1; ColumnCounter += 1)
{
if (AHashDV.Table.Columns[ColumnCounter].DataType != System.Type.GetType("System.DateTime"))
{
HashStringBuilder.Append(
RowCounter.ToString() + '/' + ColumnCounter.ToString() + ':' + AHashDV[RowCounter][ColumnCounter].ToString());
}
else
{
HashStringBuilder.Append(RowCounter.ToString() + '/' + ColumnCounter.ToString() + ':' +
TSaveConvert.DateColumnToDate(AHashDV.Table.Columns[ColumnCounter], AHashDV[RowCounter].Row).ToString("dd-MM-yy HH:MM"));
}
// Increment the size
TmpSize = AHashDV[RowCounter][ColumnCounter].ToString().Length;
ASize = ASize + TmpSize;
}
}
/*
* Calculate the hash of the string containing all values of all rows
*/
HashingProvider = new SHA1CryptoServiceProvider();
AHash = Convert.ToBase64String(HashingProvider.ComputeHash(Encoding.UTF8.GetBytes(HashStringBuilder.ToString())));
}
/// <summary>
///
/// </summary>
private IEnumerable <ICharMetric> EnumerateCharMetricsByLine(int lineIndex, bool isTabProcess, bool isAddMetaChar)
{
var chars = _textView.Doc.Lines[lineIndex].Text.AsEnumerable();
if (isAddMetaChar)
{
if (lineIndex < _textView.Doc.Lines.LastIndex())
{
chars = chars.Append(CharUtil.Space);
}
DebugUtil.DebugCode(() =>
{
if (lineIndex < _textView.Doc.Lines.LastIndex())
{
chars = chars.SkipLast(1).Append('↓');
}
else
{
chars = chars.Concat("[EOF]");
}
});
}
var lineHeight = _textView.GetLineHeight();
var columnCounter = new ColumnCounter(_textView._settings.tabWidth);
var originalIndex = 0;
var index = 0;
var lineLength = _textView.Doc.Lines[lineIndex].Length;
var x = 0.0;
var chItem = new CharMetric();
foreach (var ch in chars)
{
columnCounter.Add(ch);
var sourceChar = ch;
var color = Color.Black;
var backgroundColor = Color.Transparent;
#warning test
//if (!CharUtil.CanDraw(ch) && ch != CharUtil.Tab)
//{
// // バイナリファイルを開いた場合でも、それとなく表示できるようにしておく
// ch = '?';
//}
if (sourceChar == CharUtil.Tab && isTabProcess)
{
sourceChar = CharUtil.Space;
for (var i = 0; i < columnCounter.LastCharCount; i++)
{
DebugUtil.DebugCode(() =>
{
sourceChar = i == 0 ? '>' : '.';
color = Color.DarkCyan;
backgroundColor = Color.FromRgb(0x00aaaa);
});
var width = _textView.AsciiFont.MeasureChar(sourceChar).Width;
yield return(chItem.Init(
lineIndex, lineHeight,
sourceChar, x, index, originalIndex, 1,
color, backgroundColor, _textView.AsciiFont, width, _textView._settings.lineHeightAdjust / 2.0));
x += width;
index++;
}
}
else
{
DebugUtil.DebugCode(() =>
{
if (sourceChar == CharUtil.FullWidthSpace)
{
sourceChar = '□';
color = Color.DarkCyan;
}
if (originalIndex >= lineLength)
{
color = Color.DarkCyan;
}
});
var tempChar = (sourceChar == CharUtil.Tab) ? CharUtil.Space : sourceChar;
var font = CharUtil.IsAscii(tempChar) ? _textView.AsciiFont : _textView.JpFont;
var width = font.MeasureChar(tempChar).Width *columnCounter.LastCharCount;
yield return(chItem.Init(
lineIndex, lineHeight,
sourceChar, x, index, originalIndex, columnCounter.LastColumnCount,
color, backgroundColor, font, width, _textView._settings.lineHeightAdjust / 2.0));
x += width;
index++;
}
originalIndex++;
}
}
