private static IHighlightingHandler MakeSelectionInplaceHighlightingHander(
SelectionInfo selection, MessageTextGetter displayTextGetter, IWordSelection wordSelection, int cacheSize)
{
IHighlightingHandler newHandler = null;
if (selection?.IsSingleLine == true)
{
var normSelection = selection.Normalize();
var text = displayTextGetter(normSelection.First.Message);
var line = text.GetNthTextLine(normSelection.First.TextLineIndex);
int beginIdx = normSelection.First.LineCharIndex;
int endIdx = normSelection.Last.LineCharIndex;
var selectedPart = line.SubString(beginIdx, endIdx - beginIdx);
if (selectedPart.Any(c => !char.IsWhiteSpace(c)))
{
var options = new Search.Options()
{
Template = selectedPart,
MessageTextGetter = displayTextGetter,
};
var optionsPreprocessed = options.BeginSearch();
newHandler = new CachingHighlightingHandler(msg => GetSelectionHighlightingRanges(msg, optionsPreprocessed, wordSelection,
(normSelection.First.Message, beginIdx + line.StartIndex - text.Text.StartIndex)), cacheSize);
}
}
return(newHandler);
}
private void DoInplaceHighlighting(
IMessage msg,
PointF location,
StringSlice text,
int lineBegin, int lineEnd,
IHighlightingHandler handler,
Brush brush)
{
if (handler != null)
{
foreach (var hlRange in handler.GetHighlightingRanges(msg))
{
int?hlBegin = null;
int?hlEnd = null;
if (hlRange.Item1 >= lineBegin && hlRange.Item1 <= lineEnd)
{
hlBegin = hlRange.Item1;
}
if (hlRange.Item2 >= lineBegin && hlRange.Item2 <= lineEnd)
{
hlEnd = hlRange.Item2;
}
if (hlBegin != null || hlEnd != null)
{
var tmp = DrawingUtils.GetLineSubstringBounds(
text.SubString(lineBegin, lineEnd - lineBegin).Value,
hlBegin.GetValueOrDefault(lineBegin) - lineBegin,
hlEnd.GetValueOrDefault(lineEnd) - lineBegin,
ctx.Canvas,
ctx.Font,
ctx.TextFormat,
m.MessageRect, location.X);
tmp.Inflate(0, -1);
if (brush == null)
{
var cl = hlRange.Item3.GetBackgroundColor();
if (cl != null)
{
using (var tmpBrush = new Brush(cl.Value.ToColor()))
{
FillInplaceHightlightRectangle(ctx, tmp, tmpBrush);
}
}
}
else
{
FillInplaceHightlightRectangle(ctx, tmp, brush);
}
}
}
}
}
void UpdateSelectionInplaceHighlightingFields()
{
IHighlightingHandler newHandler = null;
if (selection.IsSingleLine)
{
var normSelection = selection.Normalize();
var line = GetTextToDisplay(normSelection.First.Message).GetNthTextLine(normSelection.First.TextLineIndex);
int beginIdx = normSelection.First.LineCharIndex;
int endIdx = normSelection.Last.LineCharIndex;
if (wordSelection.IsWordBoundary(line, beginIdx, endIdx))
{
var selectedPart = line.SubString(beginIdx, endIdx - beginIdx);
if (wordSelection.IsWord(selectedPart))
{
var options = new Search.Options()
{
Template = selectedPart,
SearchInRawText = presentationDataAccess.ShowRawMessages,
};
var optionsPreprocessed = options.BeginSearch();
newHandler = new HighlightingHandler(optionsPreprocessed, wordSelection);
}
}
}
if ((selectionInplaceHighlightingHandler != null) != (newHandler != null))
{
view.Invalidate();
}
else if (newHandler != null)
{
view.Invalidate();
}
selectionInplaceHighlightingHandler = newHandler;
}