public void AppendLine(string appendLine, IndentChange change)
{
switch (change)
{
case IndentChange.Increase:
IndentLevel++;
break;
case IndentChange.Decrease:
if (IndentLevel > 0)
{
IndentLevel--;
}
break;
default: break;
}
InsertIndentation();
stringBuilder.AppendLine(appendLine);
}
public int?GetDesiredIndentation(ITextSnapshotLine line)
{
// Look at the previous line
int line_no = line.LineNumber - 1;
var snapshot = line.Snapshot;
while (line_no >= 0)
{
var prevLine = snapshot.GetLineFromLineNumber(line_no);
var lineSpan = new SnapshotSpan(snapshot, new Span(prevLine.Start, prevLine.Length));
int prevIndent = 0;
bool nonBlank = false;
int indentInc = 0;
foreach (var tag in _lexTags.GetTags(lineSpan))
{
TokenId id = tag.Tag.type;
if (id == TokenId.Ignore || id == TokenId.Comment) // Ignore comments and whitespace
{
continue;
}
IndentChange change = IndentChange.None;
_indenters.TryGetValue(id, out change);
if (!nonBlank)
{
var tagSpans = tag.Span.GetSpans(snapshot);
prevIndent = tagSpans[0].Start - prevLine.Start;
nonBlank = true;
if (change == IndentChange.Dec || change == IndentChange.BackOne)
{
// Our 0 change position should be one level in from previous line
indentInc++;
}
}
if (change == IndentChange.Inc)
{
indentInc++;
}
if (change == IndentChange.Dec)
{
indentInc--;
}
}
if (nonBlank)
{
// We found a non-blank line
int newIndent = prevIndent + (indentInc * _options.GetIndentSize());
if (newIndent < 0)
{
return(0);
}
return(newIndent);
}
// That line was blank, try the one before
line_no--;
}
// No non-blank lines before this one, no indent
return(0);
}