97 lines
4.0 KiB
C#
97 lines
4.0 KiB
C#
#region License Statement
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// Copyright (c) L.A.B.Soft. All rights reserved.
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//
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// The use and distribution terms for this software are covered by the
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// Common Public License 1.0 (http://opensource.org/licenses/cpl.php)
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// which can be found in the file CPL.TXT at the root of this distribution.
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// By using this software in any fashion, you are agreeing to be bound by
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// the terms of this license.
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//
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// You must not remove this notice, or any other, from this software.
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#endregion
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#region Using Statements
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using System.Text.RegularExpressions;
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#endregion
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namespace Textile.Blocks
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{
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public abstract class PhraseBlockModifier : BlockModifier
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{
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protected PhraseBlockModifier()
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{
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}
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protected string PhraseModifierFormat(string input, string modifier, string tag)
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{
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// All phrase modifiers are one character, or a double character. Sometimes,
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// there's an additional escape character for the regex ('\').
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var compressedModifier = modifier;
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if (modifier.Length == 4)
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{
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compressedModifier = modifier.Substring(0, 2);
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}
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else if (modifier.Length == 2)
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{
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if (modifier[0] != '\\')
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compressedModifier = modifier[0].ToString();
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//else: compressedModifier = modifier;
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}
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//else: compressedModifier = modifier;
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// We try to remove the Textile tag used for the formatting from
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// the punctuation pattern, so that we match the end of the formatted
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// zone correctly.
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var punctuationPattern = Globals.PunctuationPattern.Replace(compressedModifier, "");
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// Now we can do the replacement.
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var pmme = new PhraseModifierMatchEvaluator(tag);
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var res = Regex.Replace(input,
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@"(?<=\s|" + punctuationPattern + @"|[{\(\[]|^)" +
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modifier +
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Globals.BlockModifiersPattern +
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@"(:(?<cite>(\S+)))?" +
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@"(?<content>[^" + compressedModifier + "]*)" +
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@"(?<end>" + punctuationPattern + @"*)" +
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modifier +
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@"(?=[\]\)}]|" + punctuationPattern + @"+|\s|$)",
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new MatchEvaluator(pmme.MatchEvaluator)
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);
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return res;
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}
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private class PhraseModifierMatchEvaluator
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{
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readonly string m_tag;
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public PhraseModifierMatchEvaluator(string tag)
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{
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m_tag = tag;
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}
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public string MatchEvaluator(Match m)
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{
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if (m.Groups["content"].Length == 0)
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{
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// It's possible that the "atts" match groups eats the contents
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// when the user didn't want to give block attributes, but the content
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// happens to match the syntax. For example: "*(blah)*".
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if (m.Groups["atts"].Length == 0)
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return m.ToString();
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return "<" + m_tag + ">" + m.Groups["atts"].Value + m.Groups["end"].Value + "</" + m_tag + ">";
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}
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var atts = BlockAttributesParser.ParseBlockAttributes(m.Groups["atts"].Value, m_tag);
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if (m.Groups["cite"].Length > 0)
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atts += " cite=\"" + m.Groups["cite"] + "\"";
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var res = "<" + m_tag + atts + ">" +
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m.Groups["content"].Value + m.Groups["end"].Value +
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"</" + m_tag + ">";
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return res;
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}
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}
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}
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}
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