public void HighlightSyntax(Regex regex, Color color)
{
var text = HighlightSupportRichTextBox.Text;
var matches =
regex.Matches(text).Cast <Match>().ToArray();
ResetTextBoxColors();
HighlightSupportRichTextBox.BeginUpdate();
int lastIndex = HighlightSupportRichTextBox.SelectionStart;
int lastLength = HighlightSupportRichTextBox.SelectionLength;
HighlightSupportRichTextBox.SelectAll();
if (matches.Length > 0)
{
int start = 0;
int end = matches.Length - 1;
SelectMatchesFromArr(matches, start, end, color);
}
HighlightSupportRichTextBox.Select(lastIndex, lastLength);
HighlightSupportRichTextBox.SelectionColor = DefaultColor;
HighlightSupportRichTextBox.EndUpdate();
}
private void SelectMatchesFromArr(Match[] matches, int startIndex, int endIndex, Color color)
{
for (int i = startIndex; i <= endIndex; i++)
{
int selectionStart = HighlightSupportRichTextBox.SelectionStart;
HighlightSupportRichTextBox.Select(matches[i].Index, matches[i].Length);
HighlightSupportRichTextBox.SelectionColor = color;
HighlightSupportRichTextBox.DeselectAll();
HighlightSupportRichTextBox.SelectionStart = selectionStart;
HighlightSupportRichTextBox.SelectionLength = 0;
}
}
public void ResetTextBoxColors()
{
HighlightSupportRichTextBox.BeginUpdate();
HighlightSupportRichTextBox.ForeColor = DefaultColor;
int selectionStart = HighlightSupportRichTextBox.SelectionStart;
int selectionLength = HighlightSupportRichTextBox.SelectionLength;
HighlightSupportRichTextBox.SelectAll();
HighlightSupportRichTextBox.SelectionColor = DefaultColor;
HighlightSupportRichTextBox.DeselectAll();
HighlightSupportRichTextBox.SelectionStart = selectionStart;
HighlightSupportRichTextBox.SelectionLength = selectionLength;
HighlightSupportRichTextBox.EndUpdate();
}
public HighlightSupportRichTextBoxColorsProcessor(HighlightSupportRichTextBox richTextBox, Color defaultColor)
{
HighlightSupportRichTextBox = richTextBox;
DefaultColor = defaultColor;
}
