Siegfried Pammer
13 years ago
16 changed files with 841 additions and 583 deletions
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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System; |
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using System.Collections.Generic; |
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using System.Diagnostics; |
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using System.Globalization; |
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using System.IO; |
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using System.Linq; |
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using System.Text; |
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using System.Threading.Tasks; |
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using ICSharpCode.NRefactory.PatternMatching; |
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using ICSharpCode.NRefactory.TypeSystem; |
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using ICSharpCode.NRefactory.CSharp; |
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namespace ICSharpCode.NRefactory.CSharp |
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{ |
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class InsertRequiredSpacesDecorator : DecoratingTokenWriter |
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{ |
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/// <summary>
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/// Used to insert the minimal amount of spaces so that the lexer recognizes the tokens that were written.
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/// </summary>
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LastWritten lastWritten; |
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enum LastWritten |
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{ |
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Whitespace, |
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Other, |
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KeywordOrIdentifier, |
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Plus, |
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Minus, |
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Ampersand, |
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QuestionMark, |
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Division |
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} |
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public InsertRequiredSpacesDecorator(ITokenWriter writer) |
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: base(writer) |
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{ |
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} |
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public override void WriteIdentifier(Identifier identifier) |
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{ |
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if (identifier.IsVerbatim) { |
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if (lastWritten == LastWritten.KeywordOrIdentifier) { |
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// this space is not strictly required, so we call Space()
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Space(); |
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} |
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} else if (lastWritten == LastWritten.KeywordOrIdentifier) { |
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// this space is strictly required, so we directly call the formatter
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base.Space(); |
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} |
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base.WriteIdentifier(identifier); |
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lastWritten = LastWritten.KeywordOrIdentifier; |
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} |
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public override void WriteKeyword(Role role, string keyword) |
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{ |
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if (lastWritten == LastWritten.KeywordOrIdentifier) { |
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Space(); |
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} |
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base.WriteKeyword(role, keyword); |
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lastWritten = LastWritten.KeywordOrIdentifier; |
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} |
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public override void WriteToken(Role role, string token) |
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{ |
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// Avoid that two +, - or ? tokens are combined into a ++, -- or ?? token.
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// Note that we don't need to handle tokens like = because there's no valid
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// C# program that contains the single token twice in a row.
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// (for +, - and &, this can happen with unary operators;
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// for ?, this can happen in "a is int? ? b : c" or "a as int? ?? 0";
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// and for /, this can happen with "1/ *ptr" or "1/ //comment".)
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if (lastWritten == LastWritten.Plus && token[0] == '+' || |
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lastWritten == LastWritten.Minus && token[0] == '-' || |
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lastWritten == LastWritten.Ampersand && token[0] == '&' || |
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lastWritten == LastWritten.QuestionMark && token[0] == '?' || |
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lastWritten == LastWritten.Division && token[0] == '*') { |
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base.Space(); |
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} |
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base.WriteToken(role, token); |
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if (token == "+") { |
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lastWritten = LastWritten.Plus; |
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} else if (token == "-") { |
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lastWritten = LastWritten.Minus; |
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} else if (token == "&") { |
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lastWritten = LastWritten.Ampersand; |
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} else if (token == "?") { |
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lastWritten = LastWritten.QuestionMark; |
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} else if (token == "/") { |
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lastWritten = LastWritten.Division; |
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} else { |
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lastWritten = LastWritten.Other; |
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} |
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} |
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public override void Space() |
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{ |
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base.Space(); |
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lastWritten = LastWritten.Whitespace; |
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} |
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public void Indent() |
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{ |
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throw new NotImplementedException(); |
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} |
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public void Unindent() |
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{ |
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throw new NotImplementedException(); |
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} |
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public override void NewLine() |
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{ |
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base.NewLine(); |
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lastWritten = LastWritten.Whitespace; |
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} |
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public override void WriteComment(CommentType commentType, string content) |
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{ |
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if (lastWritten == LastWritten.Division) { |
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// When there's a comment starting after a division operator
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// "1.0 / /*comment*/a", then we need to insert a space in front of the comment.
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base.Space(); |
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} |
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base.WriteComment(commentType, content); |
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lastWritten = LastWritten.Whitespace; |
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} |
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public override void WritePreProcessorDirective(PreProcessorDirectiveType type, string argument) |
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{ |
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base.WritePreProcessorDirective(type, argument); |
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lastWritten = LastWritten.Whitespace; |
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} |
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public override void WritePrimitiveValue(object value) |
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{ |
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base.WritePrimitiveValue(value); |
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if (value == null || value is bool) |
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return; |
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if (value is string) { |
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lastWritten = LastWritten.Other; |
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} else if (value is char) { |
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lastWritten = LastWritten.Other; |
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} else if (value is decimal) { |
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lastWritten = LastWritten.Other; |
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} else if (value is float) { |
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float f = (float)value; |
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if (float.IsInfinity(f) || float.IsNaN(f)) return; |
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lastWritten = LastWritten.Other; |
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} else if (value is double) { |
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double f = (double)value; |
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if (double.IsInfinity(f) || double.IsNaN(f)) return; |
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// needs space if identifier follows number;
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// this avoids mistaking the following identifier as type suffix
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lastWritten = LastWritten.KeywordOrIdentifier; |
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} else if (value is IFormattable) { |
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// needs space if identifier follows number;
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// this avoids mistaking the following identifier as type suffix
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lastWritten = LastWritten.KeywordOrIdentifier; |
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} else { |
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lastWritten = LastWritten.Other; |
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} |
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} |
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} |
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} |
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