75 lines
3.3 KiB
C#
75 lines
3.3 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace Textile.Blocks;
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public class HyperLinkBlockModifier : BlockModifier
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{
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private readonly string _rel = string.Empty;
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public override string ModifyLine(string line)
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{
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line = Regex.Replace(line,
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@"(?<pre>[\s[{(]|" + Globals.PunctuationPattern + @")?" + // $pre
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"\"" + // start
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Globals.BlockModifiersPattern + // attributes
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"(?<text>[\\w\\W]+?)" + // text
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@"\s?" +
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@"(?:\((?<title>[^)]+)\)(?=""))?" + // title
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"\":" +
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@"""(?<url>\S+[^""]+)""" + // url
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@"(?<slash>\/)?" + // slash
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@"(?<post>[^\w\/;]*)" + // post
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@"(?=\s|$)",
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new MatchEvaluator(HyperLinksFormatMatchEvaluator));
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return line;
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}
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private string HyperLinksFormatMatchEvaluator(Match m)
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{
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//TODO: check the URL
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var atts = BlockAttributesParser.ParseBlockAttributes(m.Groups["atts"].Value, "a");
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if (m.Groups["title"].Length > 0)
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{
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atts += " title=\"" + m.Groups["title"].Value + "\"";
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}
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var linkText = m.Groups["text"].Value.Trim(' ');
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var str = m.Groups["pre"].Value + "<a ";
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if (!string.IsNullOrEmpty(_rel))
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{
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str += "ref=\"" + _rel + "\" ";
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}
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str += "href=\"" +
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m.Groups["url"].Value + m.Groups["slash"].Value + "\"" +
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atts +
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">" + linkText + "</a>" + m.Groups["post"].Value;
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return str;
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}
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}
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