/// <summary>
/// Replaces token with formatted value of the Model.
/// </summary>
/// <param name="paragraph"></param>
/// <param name="token"></param>
/// <param name="model"></param>
/// <param name="imageProcessor"></param>
/// <returns>Position(index) after the replacement of the token.</returns>
public static int ReplaceToken(
this Paragraph paragraph,
Token token,
Model model,
IImageProcessor imageProcessor)
{
var runs = paragraph.Runs().ToArray();
var(startRunIndex, endRunIndex) = runs.FindIndeces(token.Position.TextIndex, token.ModelDescription.OriginalText.Length);
var affectedRuns = runs
.Skip(startRunIndex)
.Take(endRunIndex - startRunIndex + 1)
.ToArray();
var startRun = affectedRuns.First();
var endRun = affectedRuns.Last();
var previousRunsTextLength = runs
.Take(startRunIndex)
.TextLength();
if (startRun != endRun)
{
var replaceLength = token.ModelDescription.OriginalText.Length
- previousRunsTextLength
- affectedRuns.Take(affectedRuns.Length - 1).TextLength()
+ token.Position.TextIndex
;
endRun.ReplaceText(0, replaceLength, string.Empty);
var firstText = endRun.Childs <Text>().FirstOrDefault();
if (firstText != null)
{
firstText.Space = SpaceProcessingModeValues.Preserve;
}
}
var replaceFromIndex = token.Position.TextIndex - previousRunsTextLength;
string replacement;
int replacementLength;
switch (model)
{
case ImageModel im:
replacementLength = 0;
startRun.ReplaceText(replaceFromIndex, token.ModelDescription.OriginalText.Length, string.Empty);
startRun.SplitIntoTwoRuns(replaceFromIndex);
var imageRun = imageProcessor.AddImage(im, token.ModelDescription.Parameters);
startRun.InsertAfterSelf(imageRun);
break;
default:
replacement = model.FormattedValue() ?? string.Empty;
replacementLength = replacement.Length;
startRun.ReplaceText(replaceFromIndex, token.ModelDescription.OriginalText.Length, model.FormattedValue());
break;
}
affectedRuns
.Skip(1)
.Take(affectedRuns.Length - 2)
.RemoveSelfFromParent();
return(token.Position.TextIndex + replacementLength);
}
