Add syntax to filter dirs with regex

Author: Sébastien Geiser

RegexDialog/RegExToolDialog.xaml

@@ -844,7 +844,7 @@
                                         <Label Content="_Filters"
                                            VerticalAlignment="Center"
                                            Padding="3,0"
-                                           ToolTip="File Patterns supporting * and ? wildcards.Multi patterns separated by [,] char"/>
+                                           ToolTip="File Patterns supporting * and ? wildcards.Multi patterns separated by [,] char. Begin and end the pattern with / to filter with a Regex and double // to exclude paths after adding it."/>
                                         <ComboBox x:Name="SpecifiedDirectoryTextSourceFilterComboBox"
                                               Text="{Binding TextSourceDirectorySearchFilter, UpdateSourceTrigger=PropertyChanged}"
                                               ItemsSource="{Binding TextSourceDirectorySearchFilterHistory}"

RegexDialog/RegExToolDialog.xaml.cs

@@ -976,7 +976,22 @@ private List<string> GetFiles()
 
             filter.Split(';', ',', '|')
                 .ToList()
-                .ForEach(pattern => result.AddRange(Directory.GetFiles(Config.Instance.TextSourceDirectoryPath, pattern, Config.Instance.TextSourceDirectorySearchSubDirectories ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly)));
+                .ForEach(pattern =>
+                {
+                    if (pattern.StartsWith("//") && pattern.EndsWith("//"))
+                    {
+                        result.RemoveAll(path => Regex.IsMatch(path, pattern.Trim('/'), RegexOptions.IgnoreCase));
+                    }
+                    else if (pattern.StartsWith("/") && pattern.EndsWith("/"))
+                    {
+                        result.AddRange(Directory.GetFiles(Config.Instance.TextSourceDirectoryPath, "*", Config.Instance.TextSourceDirectorySearchSubDirectories ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly)
+                            .Where(path => Regex.IsMatch(path, pattern.Trim('/'), RegexOptions.IgnoreCase)));
+                    }
+                    else
+                    {
+                        result.AddRange(Directory.GetFiles(Config.Instance.TextSourceDirectoryPath, pattern, Config.Instance.TextSourceDirectorySearchSubDirectories ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly));
+                    }
+                });
 
             return result;
         }