internal string Format(CharPosition start, CharPosition end)
{
Paragraph paragraph = new Paragraph();
for (int lineIndex = start.CharacterY; lineIndex <= end.CharacterY; ++lineIndex)
{
string lineContent = textBuffer.GetLineContent(lineIndex);
if (string.IsNullOrEmpty(lineContent))
{
continue;
}
int charStart = 0, lineLength = lineContent.Length;
if (lineIndex == start.CharacterY) // Starting line.
{
charStart = start.CharacterX;
}
if (lineIndex == end.CharacterY) // Ending line.
{
lineLength = end.CharacterX;
}
for (int charIndex = charStart; charIndex < lineLength; ++charIndex)
{
CodeFragment fragment = null;
int fragmentWidth = codeFragmentManager.GetFragment(
charIndex, lineIndex, out fragment);
if (null == fragment)
{
// We have encountered a whitespace character (e.g. space, tab, etc),
// scan forward until we get a non-whitespace character, then flush
// whatever we have found (whitespaces) into the paragraph at one go.
//
int startIndex = charIndex;
while (charIndex < lineLength)
{
fragmentWidth = codeFragmentManager.GetFragment(
charIndex, lineIndex, out fragment);
if (fragmentWidth > 0 && (null != fragment))
{
string text = lineContent.Substring(startIndex, charIndex - startIndex);
FormatFragment(null, text, paragraph);
break;
}
charIndex = charIndex + 1;
}
if (charIndex >= lineLength)
{
// If there was no fragment at the time we reached the
// end of line, then flush out the remaining whitespaces,
// if there is any.
//
if (null == fragment && (startIndex < charIndex))
{
FormatFragment(null, lineContent.Substring(startIndex,
charIndex - startIndex), paragraph);
}
break; // Reach the end of line.
}
}
int offsetToNextChar = fragmentWidth - 1;
if ((charIndex + fragmentWidth) > (lineLength - 1))
{
fragmentWidth = (lineLength - 1) - charIndex;
offsetToNextChar = fragmentWidth - 1;
}
// Initialize the text store.
string textContent = string.Empty;
textContent = lineContent.Substring(charIndex,
((fragmentWidth == 0) ? 1 : fragmentWidth));
FormatFragment(fragment, textContent, paragraph);
if (fragmentWidth > 0)
{
charIndex += offsetToNextChar;
}
}
}
FlowDocument flowDocument = new FlowDocument();
flowDocument.TextAlignment = TextAlignment.Left;
flowDocument.FontSize = 11;
flowDocument.FontFamily = new FontFamily("Consolas");
flowDocument.FlowDirection = FlowDirection.LeftToRight;
flowDocument.TextAlignment = TextAlignment.Left;
flowDocument.Blocks.Add(paragraph);
TextRange range = new TextRange(flowDocument.ContentStart, flowDocument.ContentEnd);
if (range.CanSave(DataFormats.Rtf))
{
using (MemoryStream stream = new MemoryStream())
{
range.Save(stream, DataFormats.Rtf);
stream.Flush();
return(Encoding.UTF8.GetString(stream.ToArray()));
}
}
return(string.Empty);
}
