public TextCanvas ComposeArrow(Rule ruler, TextCanvas tc)
{
if (ruler == null)
{
throw new NoRuleSetException();
}
var arrowIdx = ruler.CalcEntryIndex(this);
Width = tc.Width;
//find the line on the text canvas
var ti = tc.Items.FirstOrDefault(t => t.Index == arrowIdx.Item1);
if (ti == null)
{
return(tc);
}
//scope in on the ranges for the located line
TextRange fromTr;
TryGetTextRange(ti.Ranges, FromBlock.Id, out fromTr);
TextRange toTr;
TryGetTextRange(ti.Ranges, ToBlock.Id, out toTr);
if (fromTr == null || toTr == null)
{
return(tc);
}
var isOuterBlock = !string.IsNullOrWhiteSpace(tc.Id);
System.Console.WriteLine(
$"({(isOuterBlock ? "Outer Block" : "InnerBlock")}) {fromTr.Id} -> {toTr.Id}");
var arrowText = new StringBuilder();
var arrowDirection = DetermineArrowDirection(fromTr.Id, toTr.Id, ti.Ranges);
switch (arrowDirection)
{
case PrintLocation.Left:
arrowText = GetLeftArrowStrBldr(fromTr, toTr, ti);
break;
case PrintLocation.Right:
arrowText = GetRightArrowStrBldr(fromTr, toTr, ti);
break;
}
tc.Items.First(t => t.Index == arrowIdx.Item1).Text =
NfString.MergeString(arrowText.ToString(),
new string(tc.Items.First(t => t.Index == arrowIdx.Item1).Text.ToArray())).ToCharArray().ToList();
return(tc);
}
public static TextCanvas Merge(this TextCanvas entry1Tc, TextCanvas entry2Tc, Rule ruler)
{
//check for null args
if (ruler == null || entry2Tc == null)
{
throw new DrawingException("A merge requires a source, a candidate and a ruler");
}
//validate args have something to work with
if (entry1Tc.IsEmptyItems() && entry2Tc.IsEmptyItems())
{
return(new TextCanvas());
}
if (entry2Tc.IsEmptyItems() && !entry1Tc.IsEmptyItems())
{
return(entry1Tc);
}
if (entry1Tc.IsEmptyItems() && !entry2Tc.IsEmptyItems())
{
return(entry2Tc);
}
//determine total edges for the whole
var entriesMin = entry1Tc.MinIndex < entry2Tc.MinIndex ? entry1Tc.MinIndex : entry2Tc.MinIndex;
var entriesMax = entry1Tc.MaxIndex > entry2Tc.MaxIndex ? entry1Tc.MaxIndex : entry2Tc.MaxIndex;
Func <TextItem, bool> tti = ti1 => ti1 != null && !ti1.IsEmptyText();
var textCanvas = new TextCanvas
{
Ruler = ruler,
Items = new List <TextItem>(),
MaxIndex = entriesMax,
MinIndex = entriesMin,
Width = entry1Tc.Width > entry2Tc.Width ? entry1Tc.Width : entry2Tc.Width
};
for (var i = entriesMin; i <= entriesMax; i++)
{
var entry1i = entry1Tc.Items.FirstOrDefault(item => item.Index == i);
var entry2i = entry2Tc.Items.FirstOrDefault(item => item.Index == i);
if (entry1i == null && entry2i == null)
{
continue;
}
//merge line
if (tti(entry1i) && tti(entry2i))
{
var newEntry = entry1i.Copy();
newEntry.Ranges.AddRange(entry2i.Ranges);
newEntry.Text =
NfString.MergeString(new string(entry1i.Text.ToArray()), new string(entry2i.Text.ToArray()))
.ToCharArray().Where(c => Convert.ToInt32(c) >= 0x20)
.ToList();
textCanvas.Items.Add(newEntry);
continue;
}
if (tti(entry1i))
{
textCanvas.Items.Add(entry1i.Copy());
continue;
}
textCanvas.Items.Add(entry2i.Copy());
}
return(textCanvas);
}