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LogicalCodeLine.cs
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LogicalCodeLine.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
namespace Rubberduck.SmartIndenter
{
public class LogicalCodeLine
{
private readonly List<AbsoluteCodeLine> _lines = new List<AbsoluteCodeLine>();
private AbsoluteCodeLine _rebuilt;
private readonly IIndenterSettings _settings;
public int IndentationLevel { get; set; }
public bool AtProcedureStart { get; set; }
public bool AtPropertyStart { get; set; }
public string PropertyIdentifier { get; set; }
public bool AtEnumTypeStart { get; set; }
public bool InsideProcedureTypeOrEnum { get; set; }
public bool IsEmpty
{
get { return _lines.All(x => x.IsEmpty); }
}
public LogicalCodeLine(AbsoluteCodeLine first, IIndenterSettings settings)
{
_lines.Add(first);
_settings = settings;
}
public LogicalCodeLine(IEnumerable<AbsoluteCodeLine> lines, IIndenterSettings settings)
{
_lines = lines.ToList();
_settings = settings;
}
public void AddContinuationLine(AbsoluteCodeLine line)
{
var last = _lines.Last();
line.IsDeclarationContinuation = last.HasDeclarationContinuation && !line.ContainsOnlyComment;
_lines.Add(line);
}
public int NextLineIndents
{
get
{
RebuildContinuedLine();
if (_rebuilt.ContainsOnlyComment)
{
return 0;
}
return _rebuilt.Segments.Count() < 2
? _rebuilt.NextLineIndents
: _rebuilt.Segments.Select(s => new AbsoluteCodeLine(s, _settings)).Select(a => a.NextLineIndents).Sum();
}
}
public int EnumTypeIndents
{
get
{
if (!IsEnumOrTypeMember)
{
return 0;
}
return _settings.IndentEnumTypeAsProcedure &&
AtEnumTypeStart &&
IsCommentBlock &&
!_settings.IndentFirstCommentBlock
? 0
: 1;
}
}
public int Outdents
{
get
{
RebuildContinuedLine();
if (_rebuilt.Segments.Count() < 2)
{
return _rebuilt.Outdents;
}
var baseSegment = new AbsoluteCodeLine(_rebuilt.Segments.First(), _settings);
return baseSegment.Outdents;
}
}
private void RebuildContinuedLine()
{
if (_rebuilt != null) return;
if (_lines.Count == 1)
{
_rebuilt = _lines.First();
return;
}
var code = _lines.Aggregate(string.Empty, (c, line) => c + line.ContinuationRebuildText);
_rebuilt = new AbsoluteCodeLine(code, _settings);
}
public bool IsProcedureStart
{
get { return _lines.Any(x => x.IsProcedureStart); }
}
public bool IsPropertyStart
{
get { return _lines.Any(x => x.IsPropertyStart); }
}
public bool IsProcedureEnd
{
get { return _lines.Any(x => x.IsProcedureEnd); }
}
public bool IsEnumOrTypeStart
{
get { return _lines.Sum(x => x.EnumOrTypeStarts) > _lines.Sum(x => x.EnumOrTypeEnds); }
}
public bool IsEnumOrTypeEnd
{
get { return _lines.Sum(x => x.EnumOrTypeEnds) > _lines.Sum(x => x.EnumOrTypeStarts); }
}
public bool IsEnumOrTypeMember { get; set; }
public bool IsDeclaration
{
get { return _lines.All(x => x.IsDeclaration || x.IsDeclarationContinuation); }
}
public bool IsCommentBlock
{
get { return _lines.All(x => x.ContainsOnlyComment); }
}
private static readonly Regex OperatorIgnoreRegex = new Regex(@"^(\d*\s)?\s*[+&]\s", RegexOptions.IgnoreCase);
public string Indented()
{
if (!_lines.Any())
{
return string.Empty;
}
if (_lines.Count == 1)
{
return _lines.First().Indent(IndentationLevel, AtProcedureStart);
}
if (!_settings.AlignContinuations || _lines.First().ContainsOnlyComment || IsEnumOrTypeMember)
{
return string.Join(Environment.NewLine, _lines.Select(line => line.Indent(IndentationLevel, AtProcedureStart)));
}
var output = new List<string>();
var current = _lines.First().Indent(IndentationLevel, AtProcedureStart);
var commentPos = string.IsNullOrEmpty(_lines.First().EndOfLineComment) ? 0 : current.Length - _lines.First().EndOfLineComment.Length;
output.Add(current);
var alignment = FunctionAlign(current, _lines[1].Escaped.Trim().StartsWith(":="));
for (var i = 1; i < _lines.Count; i++)
{
var line = _lines[i];
if (line.IsDeclarationContinuation && !line.IsProcedureStart)
{
output.Add(line.Indent(IndentationLevel, AtProcedureStart));
continue;
}
if (line.ContainsOnlyComment)
{
commentPos = alignment;
}
if (commentPos > 0)
{
output.Add(line.Indent(commentPos, AtProcedureStart, true));
continue;
}
var operatorAdjust = _settings.IgnoreOperatorsInContinuations && OperatorIgnoreRegex.IsMatch(line.Original) ? 2 : 0;
current = line.Indent(Math.Max(alignment - operatorAdjust, 0), AtProcedureStart, true);
output.Add(current);
alignment = FunctionAlign(current, i + 1 < _lines.Count && _lines[i + 1].Escaped.Trim().StartsWith(":="));
commentPos = string.IsNullOrEmpty(line.EndOfLineComment) ? 0 : current.Length - line.EndOfLineComment.Length;
}
return string.Join(Environment.NewLine, output);
}
public override string ToString()
{
return _lines.Aggregate(string.Empty, (x, y) => x + y.ToString());
}
private static readonly Regex StartIgnoreRegex = new Regex(@"^(\d*\s)?\s*[LR]?Set\s|^(\d*\s)?\s*Let\s|^(\d*\s)?\s*(Public|Private)\sDeclare\s(Function|Sub)|^(\d*\s+)", RegexOptions.IgnoreCase);
private readonly Stack<AlignmentToken> _alignment = new Stack<AlignmentToken>();
private int _nestingDepth;
//The splitNamed parameter is a straight up hack for fixing https://github.com/rubberduck-vba/Rubberduck/issues/2402
private int FunctionAlign(string line, bool splitNamed)
{
line = new StringLiteralAndBracketEscaper(line).EscapedString;
var stackPos = _alignment.Count;
for (var index = StartIgnoreRegex.Match(line).Length + 1; index <= line.Length; index++)
{
var character = line.Substring(index - 1, 1);
switch (character)
{
case "\a":
case "\x2":
break;
case "(":
//Start of another function => remember this position
_alignment.Push(new AlignmentToken(AlignmentTokenType.Function, index, ++_nestingDepth));
_alignment.Push(new AlignmentToken(AlignmentTokenType.Parameter, index + 1, _nestingDepth));
break;
case ")":
//Function finished => Remove back to the previous open bracket
while (_alignment.Any())
{
var finished = _alignment.Count == stackPos + 1;
var token =_alignment.Pop();
if (token.NestingDepth < _nestingDepth )
{
_alignment.Push(token);
finished = true;
}
if (finished)
{
_nestingDepth--;
break;
}
}
break;
case " ":
if (index + 3 < line.Length && line.Substring(index - 1, 3).Equals(" = "))
{
//Space before an = sign => remember it to align to later
if (!_alignment.Any(a => a.Type == AlignmentTokenType.Equals || a.Type == AlignmentTokenType.Variable))
{
_alignment.Push(new AlignmentToken(AlignmentTokenType.Equals, index + 2, _nestingDepth));
}
}
else if (!_alignment.Any() && index < line.Length - 2)
{
//Space after a name before the end of the line => remember it for later
_alignment.Push(new AlignmentToken(AlignmentTokenType.Variable, index, _nestingDepth));
}
else if (index > 5 && line.Substring(index - 6, 6).Equals(" Then "))
{
//Clear the collection if we find a Then in an If...Then and set the
//indenting to align with the bit after the "If "
while (_alignment.Count > 1)
{
_alignment.Pop();
}
}
break;
case ",":
//Start of a new parameter => remember it to align to
_alignment.Push(new AlignmentToken(AlignmentTokenType.Parameter, index + 1, _nestingDepth));
break;
case ":":
if (line.Substring(index - 1, 2).Equals(":="))
{
//A named paremeter => remember to align to after the name
_alignment.Push(new AlignmentToken(AlignmentTokenType.Parameter, index + 3, _nestingDepth));
}
else if (line.Substring(index, 2).Equals(": "))
{
//A new line section, so clear the brackets
_alignment.Clear();
index++;
}
break;
}
}
//If we end with a comma or a named parameter, get rid of all other comma alignments
if (line.EndsWith(", _") || line.EndsWith(":= _") || splitNamed)
{
while (_alignment.Any() && _alignment.Peek().Type == AlignmentTokenType.Parameter)
{
_alignment.Pop();
}
}
else if (line.EndsWith("( _")) //If we end with a "( _", remove it and the space alignment after it'
{
_alignment.Pop();
_alignment.Pop();
}
var output = 0;
var fallback = 0;
//Get the position of the unmatched bracket and align to that
foreach (var align in _alignment.Reverse())
{
switch (align.Type)
{
case AlignmentTokenType.Parameter:
output = align.Position - 1;
break;
case AlignmentTokenType.Function:
case AlignmentTokenType.Equals:
output = align.Position;
break;
default:
fallback = align.Position - 1;
break;
}
}
if (fallback == 0 || fallback >= line.Length - 1)
{
fallback = !_alignment.Any() ? (_settings.IndentSpaces * 2) : 0;
}
else
{
fallback = fallback + 1;
}
return output > 0 ? output : fallback;
}
}
}