255 lines
10 KiB
C#
255 lines
10 KiB
C#
// Copyright (C) 2016, The Duplicati Team
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// http://www.duplicati.com, info@duplicati.com
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.IO;
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using System.Linq;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Reflection;
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using System.Text.RegularExpressions;
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namespace Duplicati.Library.Localization
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{
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/// <summary>
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/// Class for reading embedded PO files
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/// </summary>
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public class PoLocalizationService : ILocalizationService
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{
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/// <summary>
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/// The environment variable used to locate PO files
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/// </summary>
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public const string LOCALIZATIONDIR_ENVNAME = "LOCALIZATION_FOLDER";
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/// <summary>
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/// A cached copy of all strings
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/// </summary>
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private Dictionary<string, string> m_messages = new Dictionary<string, string>();
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/// <summary>
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/// Path to search for extra .po files in
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/// </summary>
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public static string[] SearchPaths =
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string.IsNullOrWhiteSpace(AppDomain.CurrentDomain.GetData(LOCALIZATIONDIR_ENVNAME) as string)
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? new string[] { Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) }
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: (AppDomain.CurrentDomain.GetData(LOCALIZATIONDIR_ENVNAME) as string).Split(new char[] { Path.PathSeparator }, StringSplitOptions.RemoveEmptyEntries);
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/// <summary>
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/// Assembly to look for .po files in
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/// </summary>
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public static Assembly SearchAssembly = Assembly.GetExecutingAssembly();
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/// <summary>
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/// Regular expression to match a PO line entry
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/// </summary>
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private static readonly Regex PO_MATCHER = new Regex(@"(?<key>\w+(\[(?<index>[0-9]+)\])?)\s+""(?<value>(?:\\.|""""|[^""\\])*)""");
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/// <summary>
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/// Regular expression to match a locale from a filename
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/// </summary>
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private static readonly Regex CI_MATCHER = new Regex(@"localization-(?<culture>" + LocalizationService.CI_MATCHER + @")\.po");
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/// <summary>
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/// Initializes a new instance of the <see cref="T:Duplicati.Library.Localization.PoLocalizationService"/> class.
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/// </summary>
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/// <param name="ci">The culture to find.</param>
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public PoLocalizationService(CultureInfo ci)
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{
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var filenames = new string[] {
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// Load the generic country version first
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string.Format("localization-{0}.po", ci.Name),
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// Then the specialized version with overrides
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string.Format("localization-{0}.po", ci.TwoLetterISOLanguageName)
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};
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foreach(var fn in filenames)
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{
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// Use embedded version first
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if (SearchAssembly != null)
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{
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// Find the localization streams inside the assembly
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var names =
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from name in SearchAssembly.GetManifestResourceNames()
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let m = CI_MATCHER.Match(name)
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let c = m.Success && string.Equals(m.Value, fn, StringComparison.InvariantCultureIgnoreCase) ? LocalizationService.ParseCulture(m.Groups["culture"].Value) : null
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where c != null
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select name;
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foreach (var sn in names)
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using (var s = SearchAssembly.GetManifestResourceStream(sn))
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if (s != null)
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using (var sr = new StreamReader(s, System.Text.Encoding.UTF8, true))
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ParseStream(sr);
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}
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// Then override with external
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foreach(var sp in SearchPaths)
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if (!string.IsNullOrWhiteSpace(sp) && File.Exists(Path.Combine(sp, fn)))
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using (var fs = new StreamReader(Path.Combine(sp, fn), System.Text.Encoding.UTF8, true))
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ParseStream(fs);
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}
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}
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/// <summary>
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/// Parses a PO file by reading each line
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/// </summary>
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/// <param name="rd">The reader to extract data from.</param>
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private void ParseStream(TextReader rd)
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{
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string ln;
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string msgid = null;
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while ((ln = rd.ReadLine()) != null)
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{
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var m = PO_MATCHER.Match(ln);
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if (m.Success)
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{
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var key = m.Groups["key"].Value;
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var value = m.Groups["value"].Value;
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if (!string.IsNullOrEmpty(value))
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value = value.Replace("\"\"", "\"").Replace("\\\"", "\"").Replace("\\t", "\t").Replace("\\r", "\r").Replace("\\n", "\n");
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if (string.Equals(key, "msgid", StringComparison.OrdinalIgnoreCase))
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{
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msgid = value;
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}
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else if (string.Equals(key, "msgstr", StringComparison.OrdinalIgnoreCase))
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{
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m_messages[msgid] = value;
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}
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}
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}
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}
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/// <summary>
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/// Performs the actual translation
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/// </summary>
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/// <param name="msg">The message to translate.</param>
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private string Transform(string msg)
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{
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string res;
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if (string.IsNullOrWhiteSpace(msg) || !m_messages.TryGetValue(msg, out res))
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return msg;
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return res;
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}
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/// <summary>
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/// Localizes the string similar to how string.Format works
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/// </summary>
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/// <param name="message">The string to localize</param>
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/// <returns>The localized string</returns>
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public string Localize(string message)
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{
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return string.Format(Transform(message));
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}
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/// <summary>
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/// Localizes the string similar to how string.Format works
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/// </summary>
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/// <param name="message">The string to localize</param>
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/// <param name="arg0">The first argument</param>
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/// <returns>The localized string</returns>
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public string Localize(string message, object arg0)
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{
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return string.Format(Transform(message), arg0);
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}
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/// <summary>
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/// Localizes the string similar to how string.Format works
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/// </summary>
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/// <param name="message">The string to localize</param>
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/// <param name="arg0">The first argument</param>
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/// <param name="arg1">The second argument</param>
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/// <returns>The localized string</returns>
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public string Localize(string message, object arg0, object arg1)
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{
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return string.Format(Transform(message), arg0, arg1);
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}
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/// <summary>
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/// Localizes the string similar to how string.Format works
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/// </summary>
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/// <param name="message">The string to localize</param>
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/// <param name="arg0">The first argument</param>
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/// <param name="arg1">The second argument</param>
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/// <param name="arg2">The third argument</param>
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/// <returns>The localized string</returns>
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public string Localize(string message, object arg0, object arg1, object arg2)
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{
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return string.Format(Transform(message), arg0, arg1, arg2);
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}
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/// <summary>
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/// Localizes the string similar to how string.Format works
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/// </summary>
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/// <param name="message">The string to localize</param>
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/// <param name="args">The arguments</param>
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public string Localize(string message, params object[] args)
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{
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return string.Format(Transform(message), args);
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}
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/// <summary>
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/// Gets all strings.
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/// </summary>
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public IDictionary<string, string> AllStrings { get { return m_messages; } }
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private static string[] m_supportedcultures = null;
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/// <summary>
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/// Gets a list of all the supported cultures
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/// </summary>
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public static IEnumerable<string> SupportedCultures
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{
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get
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{
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if (m_supportedcultures == null)
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{
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var lst = new string[0].AsEnumerable();
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if (SearchAssembly != null)
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lst = lst.Union(SearchAssembly.GetManifestResourceNames());
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foreach (var sp in SearchPaths)
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if (Directory.Exists(sp))
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lst = lst.Union(Directory.GetFiles(sp, "localization-*.po"));
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var allcultures =
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from name in lst
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let m = CI_MATCHER.Match(name)
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let ci = m.Success ? LocalizationService.ParseCulture(m.Groups["culture"].Value) : null
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where ci != null
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select ci;
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m_supportedcultures =
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allcultures
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.Select(x => x.TwoLetterISOLanguageName).Distinct().OrderBy(x => x)
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.Union(
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allcultures.Select(x => x.Name).Distinct().OrderBy(x => x)
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).ToArray();
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}
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return m_supportedcultures;
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}
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}
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}
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}
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