private string DeleteMarks(RenderingRule rule, string rawText)
{
var selection = rule.GetSelection(rawText);
var renderedText = rawText.Replace(selection, rule.Selector.Start, rule.Selector.GetLength());
return(renderedText);
}
public string RenderWithPriority(RenderingRule rule, string rawText)
{
string renderedText;
var selection = rule.GetSelection(rawText);
var intersectedRules = RenderingRules.Where(r => IntersectedWithRenderedRule(selection, r)).ToList();
if (intersectedRules.Any())
{
foreach (var r in intersectedRules)
{
rule.Selector.Start += r.OpeningTag.Length - 1;
}
return(DeleteMarks(rule, rawText));
}
if (IntersectedWithHigherPriorityRule(rule))
{
var oldEndOfSelection = rule.Selector.End;
var oldStartOfSelection = rule.Selector.Start;
renderedText = DeleteMarks(rule, rawText);
MoveIntersectedStarts(rule, oldStartOfSelection, oldEndOfSelection);
return(renderedText);
}
renderedText = Render(rule, rawText);
rule.Selector.ResetSelection();
return(renderedText);
}
private string Render(RenderingRule rule, string rawText)
{
var selection = rule.GetSelection(rawText);
var tagedSelection = String.Concat(rule.OpeningTag, selection, rule.ClosingTag);
var renderedText = rawText.Replace(tagedSelection, rule.Selector.Start, rule.Selector.GetLength());
return(renderedText);
}
private void MoveIntersectedStarts(RenderingRule rule, int oldStartOfSelection, int oldEndOfSelection)
{
var intersectedRules = RenderingRules.Where(r => r.Selector.Start < oldEndOfSelection)
.Where(r => r.Selector.Start > oldStartOfSelection)
.ToList();
foreach (var r in intersectedRules)
{
r.Selector.Start -= rule.Mark.Length;
}
}
private bool IntersectedWithHigherPriorityRule(RenderingRule rule)
{
return(RenderingRules.Where(r => r.Selector.Start != -1).Any(r => r.PriorityLevel < rule.PriorityLevel));
}
private bool IntersectedWithRenderedRule(string selection, RenderingRule rule)
{
return(selection.Contains(rule.ClosingTag) &&
!selection.Contains(rule.OpeningTag));
}