/// <summary>
/// Creates a new instance of BaseHighlighter
/// </summary>
/// <param name="document">Document to highlight</param>
public BaseHighlighter(ITextDocument document)
{
this.document = document;
// Much faster to keep a worker range rather than to keep requesting one from
// the document
this.workerRange = document.GetRange(0, 0);
this._highlights = new List<Tuple<Regex, Action<ITextCharacterFormat>>>();
// Add highlighting rules
AddHighlightRules();
}
private static void ForEachLinkInDocument(ITextDocument document, Action <ITextRange> action)
{
var range = document.GetRange(0, 0);
range.SetIndex(TextRangeUnit.Character, -1, false);
// Handle link at the very end of the document where GetIndex fails to detect
range.Expand(TextRangeUnit.Link);
if (!string.IsNullOrEmpty(range.Link))
{
action?.Invoke(range);
}
var nextIndex = range.GetIndex(TextRangeUnit.Link);
while (nextIndex != 0 && nextIndex != 1)
{
range.Move(TextRangeUnit.Link, -1);
var linkRange = range.GetClone();
linkRange.Expand(TextRangeUnit.Link);
// Adjacent links have the same index. Manually check each link with Collapse and Expand.
var previousStart = linkRange.StartPosition;
var hasAdjacentToken = true;
while (hasAdjacentToken)
{
action?.Invoke(linkRange);
linkRange.Collapse(false);
linkRange.Expand(TextRangeUnit.Link);
hasAdjacentToken = !string.IsNullOrEmpty(linkRange.Link) && linkRange.StartPosition != previousStart;
previousStart = linkRange.StartPosition;
}
nextIndex = range.GetIndex(TextRangeUnit.Link);
}
}
public static void ToHtml(ITextDocument doc)
{
// Takes a RichEditBox control and returns a
// simple HTML-formatted version of its contents
string strHTML, strFont, strColour, strBold, strFntName;
float shtSize;
int lngOriginalStart, lngOriginalLength;
int intCount = 0;
ITextRange tr = doc.GetRange(0, 9999999);
// If nothing in the box, exit
if (tr.Length == 0)
{
//App.Current.Exit();
}
// Store original selections, then select first character
lngOriginalStart = 0;
lngOriginalLength = tr.Length;
tr.SetRange(0, 1);
// Add HTML header
strHTML = "<html>";
// Set up initial parameters
strColour = tr.CharacterFormat.ForegroundColor.ToString();
strFont = tr.CharacterFormat.FontStyle.ToString();
shtSize = tr.CharacterFormat.Size;
strBold = tr.CharacterFormat.Bold.ToString();
strFntName = tr.CharacterFormat.Name;
Debug.WriteLine("Colour: " + strColour);
// Include first 'style' parameters in the HTML
strHTML += "<span style=\"font-family:" + strFntName + "; font-size: " + shtSize + "pt; color: #" + strColour.Substring(3) + "\">";
// Include bold tag, if required
if (strBold.ToLower() == "on")
{
strHTML += "<b>";
}
// Include italic tag, if required
if (strFont.ToLower() == "italic")
{
strHTML += "<i>";
}
// Finally, add our first character
strHTML += tr.Character;
// Loop around all remaining characters
for (intCount = 2; intCount < lngOriginalLength; intCount++)
{
// Select current character
tr.SetRange(intCount - 1, intCount + 1);
// If this is a line break, add HTML tag
if (tr.Character == Convert.ToChar(13))
{
strHTML += "<br />";
}
// ' Check/implement any changes in style
if (tr.CharacterFormat.ForegroundColor.ToString() != strColour || tr.CharacterFormat.Name != strFntName || tr.CharacterFormat.Size != shtSize)
{
strHTML += "</span><span style=\"font-family: " + tr.CharacterFormat.Name + "; font size: " + tr.CharacterFormat.Size + "pt; color: #" + tr.CharacterFormat.ForegroundColor.ToString().Substring(3) + "\">";
}
// Check for bold changes
if (tr.CharacterFormat.Bold.ToString().ToLower() != strBold.ToLower())
{
if (tr.CharacterFormat.Bold.ToString().ToLower() != "on")
{
strHTML += "</b>";
}
else
{
strHTML += "<b>";
}
}
// Check for italic changes
if (tr.CharacterFormat.FontStyle.ToString().ToLower() != strFont.ToLower())
{
if (tr.CharacterFormat.FontStyle.ToString().ToLower() != "italic")
{
strHTML += "</i>";
}
else
{
strHTML += "<i>";
}
}
// ' Add the actual character
strHTML += tr.Character;
// ' Update variables with current style
strColour = tr.CharacterFormat.ForegroundColor.ToString();
strFont = tr.CharacterFormat.FontStyle.ToString();
shtSize = tr.CharacterFormat.Size;
strFntName = tr.CharacterFormat.Name;
strBold = tr.CharacterFormat.Bold.ToString();
}
// Close off any open bold/italic tags
if (strBold == "on")
{
strHTML += "";
}
if (strFont.ToLower() == "italic")
{
strHTML += "";
}
// Terminate outstanding HTML tags
strHTML += "</span></html>";
//' Restore original RichTextBox selection
tr.SetRange(lngOriginalStart, lngOriginalLength);
doc.SetText(TextSetOptions.FormatRtf, strHTML);
}
public static void SetRangeColor(this ITextDocument document, int start, int end, Color color)
{
ITextRange range = document.GetRange(start, end);
range.CharacterFormat.ForegroundColor = color;
}
public static ITextRange GetRangeAt(this ITextDocument document, int position)
{
return(document.GetRange(position, position));
}
