private (CommentGroup comments, int endline) ConsumeCommentGroup(int n)
{
var list = new slice <Comment>();
var endline = tok.Pos.Line;
while (tok.Type == TokenType.COMMENT && tok.Pos.Line <= endline + n)
{
Comment comment;
(comment, endline) = ConsumeComment();
list = list.Append(comment);
}
// add comment group to the comments list
var comments = new CommentGroup {
List = list
};
this.comments = this.comments.Append(comments);
return(comments, endline);
}
public void Add(ObjectItem item)
{
Items = Items.Append(item);
}
public void Add(INode node)
{
List = List.Append(node);
}
/// Format the text between line0 and line1 (excluding line1); pos
/// is the buffer position corresponding to the beginning of line0.
/// Returns the buffer position corresponding to the beginning of
/// line1 and an error, if any.
///
private int Format(int pos0, int line0, int line1)
{
var pos = pos0;
var column = widths.Length;
for (var thisLine = line0; thisLine < line1; thisLine++)
{
var line = lines[thisLine];
if (column < line.Length - 1)
{
// cell exists in this column => this line
// has more cells than the previous line
// (the last cell per line is ignored because cells are
// tab-terminated; the last cell per line describes the
// text before the newline/formfeed and does not belong
// to a column)
// print unprinted lines until beginning of block
pos = WriteLines(pos, line0, thisLine);
line0 = thisLine;
// column block begin
var width = minwidth; // minimal column width
var discardable = true; // true if all cells in this column are empty and "soft"
for (; thisLine < line1; thisLine++)
{
line = lines[thisLine];
if (column < line.Length - 1)
{
// cell exists in this column
var c = line[column];
// update width
var w = c.width + padding;
if (w > width)
{
width = w;
}
// update discardable
if (c.width > 0 || c.htab)
{
discardable = false;
}
}
else
{
break;
}
}
// column block end
// discard empty columns if necessary
if (discardable && (flags & Formatting.DiscardEmptyColumns) != 0)
{
width = 0;
}
// format and print all columns to the right of this column
// (we know the widths of this column and all columns to the left)
widths = widths.Append(width); // push width
pos = Format(pos, line0, thisLine);
widths = widths.Slice(0, widths.Length - 1); // pop width
line0 = thisLine;
}
}
// print unprinted lines until end
return(WriteLines(pos, line0, line1));
}
private slice <int> widths; // list of column widths in runes - re-used during formatting
private void AddLine()
{
this.lines = lines.Append(new slice <Cell>());
}