private void FindNext()
{
if (_currentFindHighlights != null && _currentFindHighlights.Count > 0)
{
_currentFindIndex++;
if (_currentFindIndex >= _currentFindHighlights.Count)
{
_currentFindIndex = 0;
}
RtfHighlight currentHighlight = _currentFindHighlights[_currentFindIndex];
HighlightMatch(_textBox, currentHighlight);
}
}
/// <summary>
/// Converts a byte array into an RTF for the raw traffic view
/// </summary>
/// <param name="text"></param>
/// <param name="highlights">List of highlights to be applied to this Rtf</param>
/// <returns>Rtf formatted string</returns>
public string Convert(string text, params RtfHighlight[] highlights)
{
_cancelRequested = false;
int i, n = text.Length;
int lastBreakIndex = 0; //maintains the index following the last break in the text
Dictionary <Color, int> colorMap = new Dictionary <Color, int>(); //holds color map for the rtf
StringBuilder sb = new StringBuilder(n);
sb.Append(RTF_HEADER1);
sb.Append(RTF_FONT_TABLE);
//if there is highlighting define a color table
highlights = SortHighlights(highlights);
int hIndex = 0; //maintains the index of the last processed highlight
int hLen = highlights.Length;
//generate the color table
sb.Append("\r\n{\\colortbl ");
//get the default font color
Color defaultFontColor = TVColorConverter.GetColorFromString(TrafficViewerOptions.Instance.ColorTextboxText);
sb.AppendFormat(@"\red{0}\green{1}\blue{2};",
defaultFontColor.R,
defaultFontColor.G,
defaultFontColor.B);
Color defaultBkgColor = TVColorConverter.GetColorFromString(TrafficViewerOptions.Instance.ColorTextboxBackground);
sb.AppendFormat(@"\red{0}\green{1}\blue{2};",
defaultBkgColor.R,
defaultBkgColor.G,
defaultBkgColor.B);
const int DEFAULT_FONT_COLOR_INDEX = 0;
const int DEFAULT_BKG_COLOR_INDEX = 1;
const int HIGHLIGHTS_OFFSET = 2;
if (hLen > 0)
{
int colorIndex = HIGHLIGHTS_OFFSET;
foreach (RtfHighlight h in highlights)
{
if (!colorMap.ContainsKey(h.Color))
{
colorMap.Add(h.Color, colorIndex);
colorIndex++;
sb.AppendFormat(@"\red{0}\green{1}\blue{2};", h.Color.R, h.Color.G, h.Color.B);
}
}
}
sb.Append("}");
sb.Append(Environment.NewLine);
sb.Append(RTF_HEADER2);
//add /PAR for each newline add /TAB for each tab
//add highlighting
//start by adding a default text color
sb.Append("\\cf0 ");
int len; //used in measuring a chunk to be written to the string builder
RtfHighlight currHlt = null;
int nextBreak = 0;
string formatText = String.Empty;
for (i = 0; i < n && !_cancelRequested; i++)
{
int colorIndex = 0;
//start a highlight section if necessary
if (hIndex < hLen && highlights[hIndex].Start == i)
{
currHlt = highlights[hIndex];
if (colorMap.TryGetValue(currHlt.Color, out colorIndex))
{
//append the text collected since the last highlight or special symbol
len = i - lastBreakIndex;
sb.Append(text, lastBreakIndex, len);
lastBreakIndex = i;
if (currHlt.Type == RtfHighlightType.Background)
{
formatText = "highlight";
}
else
{
formatText = "cf";
}
sb.AppendFormat("\\{0}{1} ", formatText, colorIndex);
//calculate the index where the highlight stops
nextBreak = i + currHlt.Length;
//the highlight tag was appended continue as usual
}
else
{
currHlt = null;
}
}
//check for special symbols
short charCode = (short)text[i];
if (text[i] == NL)
{
len = i - lastBreakIndex;
bool cr = false;
if (i > 0 && len > 0 && text[i - 1] == CR)
{
cr = true;
//append the cr after the \par
len--;
}
sb.Append(text, lastBreakIndex, len);
if (currHlt == null)
{
sb.Append(@"\par");
}
if (cr)
{
sb.Append("\r");
}
sb.Append("\n");
lastBreakIndex = i + 1;
}
else if (text[i] == TB)
{
len = i - lastBreakIndex;
sb.Append(text, lastBreakIndex, len);
while (i < n && text[i] == TB)
{
sb.Append("\\tab");
i++;
}
sb.Append(' ');
lastBreakIndex = i;
i--;
}
else if (text[i] == '{' || text[i] == '}' || text[i] == '\\')
{
len = i - lastBreakIndex;
sb.Append(text, lastBreakIndex, len);
sb.Append("\\" + text[i]);
lastBreakIndex = i + 1;
}
else if (charCode > 127 || charCode <= 0)
{
//any characters above the regular ASCII set should be converted to unicode
len = i - lastBreakIndex;
sb.Append(text, lastBreakIndex, len);
sb.AppendFormat("\\u{0}?", charCode);
lastBreakIndex = i + 1;
}
//close the highlight
if (currHlt != null && i == nextBreak)
{
//append the text in between as usual
len = i - lastBreakIndex;
if (len > 0)
{
sb.Append(text, lastBreakIndex, len);
}
//depending on the type of highlight set the default color back
int defColorIndex = currHlt.Type == RtfHighlightType.Foreground ?
DEFAULT_FONT_COLOR_INDEX : DEFAULT_BKG_COLOR_INDEX;
sb.AppendFormat("\\{0}{1} ", formatText, defColorIndex);
lastBreakIndex = i;
i--;
currHlt = null;
hIndex++;
}
}
len = i - lastBreakIndex;
if (len > 0 && i <= n)
{
sb.Append(text, lastBreakIndex, len);
if (currHlt != null)
{
//depending on the type of highlight set the default color back
int defColorIndex = currHlt.Type == RtfHighlightType.Foreground ?
DEFAULT_FONT_COLOR_INDEX : DEFAULT_BKG_COLOR_INDEX;
//close any highlights that were eventually opened before the end
sb.AppendFormat("\\{0}{1} ", formatText, defColorIndex);
}
}
sb.Append(RTF_FOOTER);
return(sb.ToString());
}
private void HighlightMatch(RichTextBox box, RtfHighlight currHighlight)
{
box.Focus();
box.Select(currHighlight.Start, currHighlight.Length);
box.ScrollToCaret();
}