DocSpace-client/common/ASC.Textile/States/ListFormatterState.cs

125 lines
4.1 KiB
C#

namespace Textile.States
{
/// <summary>
/// Base formatting state for all lists.
/// </summary>
abstract public class ListFormatterState : FormatterState
{
internal const string PatternBegin = @"^\s*(?<tag>";
internal const string PatternEnd = @")" + Globals.BlockModifiersPattern + @"(?:\s+)? (?<content>.*)$";
private bool _firstItem = true;
private bool _firstItemLine = true;
private string _tag;
private string _attsInfo;
private string _alignInfo;
protected int NestingDepth
{
get { return _tag.Length; }
}
protected ListFormatterState(TextileFormatter formatter)
: base(formatter)
{
}
public override string Consume(string input, Match m)
{
_tag = m.Groups["tag"].Value;
_alignInfo = m.Groups["align"].Value;
_attsInfo = m.Groups["atts"].Value;
input = m.Groups["content"].Value;
this.Formatter.ChangeState(this);
return input;
}
public sealed override void Enter()
{
_firstItem = true;
_firstItemLine = true;
WriteIndent();
}
public sealed override void Exit()
{
Formatter.Output.WriteLine("</li>");
WriteOutdent();
}
public sealed override void FormatLine(string input)
{
if (_firstItemLine)
{
if (!_firstItem)
Formatter.Output.WriteLine("</li>");
Formatter.Output.Write("<li " + FormattedStylesAndAlignment("li") + ">");
_firstItemLine = false;
}
else
{
Formatter.Output.WriteLine("<br />");
}
Formatter.Output.Write(input);
_firstItem = false;
}
public sealed override bool ShouldNestState(FormatterState other)
{
var listState = (ListFormatterState)other;
return listState.NestingDepth > NestingDepth;
}
public sealed override bool ShouldExit(string input)
{
// If we have an empty line, we can exit.
if (string.IsNullOrEmpty(input))
return true;
// We exit this list if the next
// list item is of the same type but less
// deep as us, or of the other type of
// list and as deep or less.
if (NestingDepth > 1)
{
if (IsMatchForMe(input, 1, NestingDepth - 1))
return true;
}
if (IsMatchForOthers(input, 1, NestingDepth))
return true;
// As it seems we're going to continue taking
// care of this line, we take the opportunity
// to check whether it's the same list item as
// previously (no "**" or "##" tags), or if it's
// a new list item.
if (IsMatchForMe(input, NestingDepth, NestingDepth))
_firstItemLine = true;
return false;
}
public sealed override bool ShouldParseForNewFormatterState(string input)
{
// We don't let anyone but ourselves mess with our stuff.
if (IsMatchForMe(input, 1, 100))
return true;
if (IsMatchForOthers(input, 1, 100))
return true;
return false;
}
protected abstract void WriteIndent();
protected abstract void WriteOutdent();
protected abstract bool IsMatchForMe(string input, int minNestingDepth, int maxNestingDepth);
protected abstract bool IsMatchForOthers(string input, int minNestingDepth, int maxNestingDepth);
protected string FormattedStylesAndAlignment(string element)
{
return Blocks.BlockAttributesParser.ParseBlockAttributes(_alignInfo + _attsInfo, element);
}
}
}