public static TextCanvas ToTextCanvas(this IRuleEntry entry, Rule ruler)
{
if (ruler == null)
{
throw new NoRuleSetException();
}
var entryIndex = ruler.CalcEntryIndex(entry);
var entryLines = entry.ToString().Split(Config.GraphChars.UNIX_NL_CHAR);
var ruleIndex = ruler.GetIndexRule();
//iteration is on this difference so there needs to be at least that many lines in the string
if (entryIndex.Item2 - entryIndex.Item1 > entryLines.Length)
{
throw new DrawingException(
string.Format(
"Entry is indexed at '{0}' to '{1}', a difference of '{2}' while the entry as a string is composed of '{3}' lines",
entryIndex.Item1,
entryIndex.Item2,
(entryIndex.Item2 - entryIndex.Item1),
entryLines.Length));
}
var textCanvas = new TextCanvas
{
Ruler = ruler,
Items = new List <TextItem>(),
MinIndex = entryIndex.Item1,
MaxIndex = entryIndex.Item2,
StartValue = entry.StartValue,
EndValue = entry.EndValue,
Width = entry.Width,
Id = entry.Id
};
//single line entry
if (entryIndex.Item2 == entryIndex.Item1)
{
if (entryIndex.Item1 < 0 || entryIndex.Item1 >= ruleIndex.Count)
{
throw new DrawingException(
string.Format(
"The entry by ID '{0}' having the text value of '{1}' " +
"is set to a position that is beyond the current ruler's max.",
entry.Id, entry));
}
textCanvas.Items.Add(new TextItem
{
HashMarkValue = ruleIndex[entryIndex.Item1],
Index = entryIndex.Item1,
Text = entry.ToString().ToCharArray().ToList()
});
return(textCanvas);
}
//multiple line entry
for (var i = entryIndex.Item1; i <= entryIndex.Item2; i++)
{
var hashMark = ruleIndex[i];
var text = entryLines[(i - entryIndex.Item1)];
if (string.IsNullOrEmpty(text))
{
continue;
}
var nti = new TextItem
{
HashMarkValue = hashMark,
Index = i,
Text = text.ToCharArray().ToList()
};
nti.Ranges.Add(new TextRange()
{
Id = entry.Id, Length = nti.Text.Count, StartIndex = 0
});
textCanvas.Items.Add(nti);
}
return(textCanvas);
}
