private static int UpdatePossibleOverlaps(
Dictionary <TextFormattingRule, ICollection <Position> > dict,
List <WrappedFormat> possibleOverlaps,
int totalShift,
TextFormattingRule rule,
Position toProcess)
{
Func <Position, WrappedFormat, bool> toRemovePredicate = (pos2, outside) => outside.OriginalPosition.GetOverlap(pos2) == Position.OverlapType.None;
IEnumerable <WrappedFormat> toRemove = from p in possibleOverlaps where toRemovePredicate(toProcess, p) select p;
foreach (var item in toRemove.ToList())
{
totalShift += item.Rule.TotalLength;
FixDict(dict, item);
possibleOverlaps.Remove(item);
}
//TODO: Extracting this snippet back would remove the rule variable.
foreach (var item in possibleOverlaps)
{
item.AddRule(rule, item.OriginalPosition.GetOverlap(toProcess));
}
return(totalShift);
}
/// <summary>
/// Returns all the positions of an available for a formatting rule, or an empty collection if nothing exists.
/// </summary>
/// <param name="rule">The formatting rule to look for.</param>
/// <returns></returns>
private IEnumerable <Position> IfFound(TextFormattingRule rule)
{
if (rule == null)
{
throw new ArgumentNullException("rule");
}
return(Positions.ContainsKey(rule) ? Positions[rule] : new List <Position>());
}
public void IncrementPosition(Position p, TextFormattingRule rule)
{
if (p.Start < previousStart)
{
throw new ArgumentException("The supplied string position starts before the end of the processed and finalised data. Most likely caused by passing an unsorted collection to the state machine.");
}
if (p.Start > previousStart)
{
var toApply = from r in todo where r.Position.Start <= p.Start orderby r.Position.Start ascending select r;
int currentStart = previousStart;
foreach (var r in toApply)
{
if (r.Position.Start > currentStart)
{
builder.Append(value.Substring(currentStart, r.Position.Start - currentStart));
}
currentStart = r.Position.Start;
builder.Append(r.Value);
}
//TODO: Add rest of string.
builder.Append(value.Substring(currentStart, p.Start - currentStart));
previousStart = p.Start;
foreach (var pp in toApply)
{
todo.Remove(pp);
}
}
var rules = rule.UnProcess(value, p);
var toProcess = from r in rules where r.Position.Start == p.Start select r;
foreach (var r in toProcess)
{
builder.Append(r.Value);
}
//The range is inserted at 0 to keep the ordering of the tags if the position is the same,
//for example; <u><b> should be matched to </b></u>
todo.InsertRange(0, rules.Except(toProcess));
}
public replacement(Position p, TextFormattingRule rule)
{
this.p = p;
this.rule = rule;
}
