IPublicAPI.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Runtime.CompilerServices;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;
using Flow.Launcher.Plugin.SharedModels;
using JetBrains.Annotations;

namespace Flow.Launcher.Plugin
{
    /// <summary>
    /// Public APIs that plugin can use
    /// </summary>
    public interface IPublicAPI
    {
        /// <summary>
        /// Change Flow.Launcher query.
        /// When current results are from context menu or history, it will go back to query results before changing query.
        /// </summary>
        /// <param name="query">query text</param>
        /// <param name="requery">
        /// Force requery. By default, Flow Launcher will not fire query if your query is same with existing one.
        /// Set this to <see langword="true"/> to force Flow Launcher re-querying
        /// </param>
        void ChangeQuery(string query, bool requery = false);

        /// <summary>
        /// Restart Flow Launcher
        /// </summary>
        void RestartApp();

        /// <summary>
        /// Run a shell command
        /// </summary>
        /// <param name="cmd">The command or program to run</param>
        /// <param name="filename">the shell type to run, e.g. powershell.exe</param>
        /// <exception cref="FileNotFoundException">Thrown when unable to find the file specified in the command </exception>
        /// <exception cref="Win32Exception">Thrown when error occurs during the execution of the command </exception>
        void ShellRun(string cmd, string filename = "cmd.exe");

        /// <summary>
        /// Copies the passed in text and shows a message indicating whether the operation was completed successfully.
        /// When directCopy is set to true and passed in text is the path to a file or directory,
        /// the actual file/directory will be copied to clipboard. Otherwise the text itself will still be copied to clipboard.
        /// </summary>
        /// <param name="text">Text to save on clipboard</param>
        /// <param name="directCopy">When true it will directly copy the file/folder from the path specified in text</param>
        /// <param name="showDefaultNotification">Whether to show the default notification from this method after copy is done.
        ///                                         It will show file/folder/text is copied successfully.
        ///                                         Turn this off to show your own notification after copy is done.</param>>
        public void CopyToClipboard(string text, bool directCopy = false, bool showDefaultNotification = true);

        /// <summary>
        /// Save everything, all of Flow Launcher and plugins' data and settings
        /// </summary>
        void SaveAppAllSettings();

        /// <summary>
        /// Save all Flow's plugins settings
        /// </summary>
        void SavePluginSettings();

        /// <summary>
        /// Reloads any Plugins that have the
        /// IReloadable implemented. It refeshes
        /// Plugin's in memory data with new content
        /// added by user.
        /// </summary>
        Task ReloadAllPluginData();

        /// <summary>
        /// Check for new Flow Launcher update
        /// </summary>
        void CheckForNewUpdate();

        /// <summary>
        /// Show the error message using Flow's standard error icon.
        /// </summary>
        /// <param name="title">Message title</param>
        /// <param name="subTitle">Optional message subtitle</param>
        void ShowMsgError(string title, string subTitle = "");

        /// <summary>
        /// Show the error message using Flow's standard error icon.
        /// </summary>
        /// <param name="title">Message title</param>
        /// <param name="buttonText">Message button content</param>
        /// <param name="buttonAction">Message button action</param>
        /// <param name="subTitle">Optional message subtitle</param>
        void ShowMsgErrorWithButton(string title, string buttonText, Action buttonAction, string subTitle = "");

        /// <summary>
        /// Show the MainWindow when hiding
        /// </summary>
        void ShowMainWindow();

        /// <summary>
        /// Focus the query text box in the main window
        /// </summary>
        void FocusQueryTextBox();

        /// <summary>
        /// Hide MainWindow
        /// </summary>
        void HideMainWindow();

        /// <summary>
        /// Representing whether the main window is visible
        /// </summary>
        /// <returns></returns>
        bool IsMainWindowVisible();

        /// <summary>
        /// Invoked when the visibility of the main window has changed. Currently, the plugin will continue to be subscribed even if it is turned off.
        /// </summary>
        event VisibilityChangedEventHandler VisibilityChanged;

        /// <summary>
        /// Show message box
        /// </summary>
        /// <param name="title">Message title</param>
        /// <param name="subTitle">Message subtitle</param>
        /// <param name="iconPath">Message icon path (relative path to your plugin folder)</param>
        void ShowMsg(string title, string subTitle = "", string iconPath = "");

        /// <summary>
        /// Show message box
        /// </summary>
        /// <param name="title">Message title</param>
        /// <param name="subTitle">Message subtitle</param>
        /// <param name="iconPath">Message icon path (relative path to your plugin folder)</param>
        /// <param name="useMainWindowAsOwner">when true will use main windows as the owner</param>
        void ShowMsg(string title, string subTitle, string iconPath, bool useMainWindowAsOwner = true);

        /// <summary>
        /// Show message box with button
        /// </summary>
        /// <param name="title">Message title</param>
        /// <param name="buttonText">Message button content</param>
        /// <param name="buttonAction">Message button action</param>
        /// <param name="subTitle">Message subtitle</param>
        /// <param name="iconPath">Message icon path (relative path to your plugin folder)</param>
        void ShowMsgWithButton(string title, string buttonText, Action buttonAction, string subTitle = "", string iconPath = "");

        /// <summary>
        /// Show message box with button
        /// </summary>
        /// <param name="title">Message title</param>
        /// <param name="buttonText">Message button content</param>
        /// <param name="buttonAction">Message button action</param>
        /// <param name="subTitle">Message subtitle</param>
        /// <param name="iconPath">Message icon path (relative path to your plugin folder)</param>
        /// <param name="useMainWindowAsOwner">when true will use main windows as the owner</param>
        void ShowMsgWithButton(string title, string buttonText, Action buttonAction, string subTitle, string iconPath, bool useMainWindowAsOwner = true);

        /// <summary>
        /// Open setting dialog
        /// </summary>
        void OpenSettingDialog();

        /// <summary>
        /// Get translation of current language
        /// You need to implement IPluginI18n if you want to support multiple languages for your plugin
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        string GetTranslation(string key);

        /// <summary>
        /// Get all loaded plugins
        /// </summary>
        /// <remarks>
        /// Will also return any plugins not fully initialized yet
        /// </remarks>
        /// <returns></returns>
        List<PluginPair> GetAllPlugins();

        /// <summary>
        /// Get all initialized plugins
        /// </summary>
        /// <param name="includeFailed">
        /// Whether to include plugins that failed to initialize
        /// </param>
        /// <returns></returns>
        List<PluginPair> GetAllInitializedPlugins(bool includeFailed);

        /// <summary>
        /// Registers a callback function for global keyboard events.
        /// </summary>
        /// <param name="callback">
        /// The callback function to invoke when a global keyboard event occurs.
        /// <para>
        /// Parameters:
        /// <list type="number">
        ///   <item><description>int: The type of <see cref="KeyEvent"/> (key down, key up, etc.)</description></item>
        ///   <item><description>int: The virtual key code of the pressed/released key</description></item>
        ///   <item><description><see cref="SpecialKeyState"/>: The state of modifier keys (Ctrl, Alt, Shift, etc.)</description></item>
        /// </list>
        /// </para>
        /// <para>
        /// Returns: <c>true</c> to allow normal system processing of the key event,
        /// or <c>false</c> to intercept and prevent default handling.
        /// </para>
        /// </param>
        /// <remarks>
        /// This callback will be invoked for all keyboard events system-wide.
        /// Use with caution as intercepting system keys may affect normal system operation.
        /// </remarks>
        public void RegisterGlobalKeyboardCallback(Func<int, int, SpecialKeyState, bool> callback);

        /// <summary>
        /// Remove a callback for Global Keyboard Event
        /// </summary>
        /// <param name="callback">
        /// The callback function to invoke when a global keyboard event occurs.
        /// <para>
        /// Parameters:
        /// <list type="number">
        ///   <item><description>int: The type of <see cref="KeyEvent"/> (key down, key up, etc.)</description></item>
        ///   <item><description>int: The virtual key code of the pressed/released key</description></item>
        ///   <item><description><see cref="SpecialKeyState"/>: The state of modifier keys (Ctrl, Alt, Shift, etc.)</description></item>
        /// </list>
        /// </para>
        /// <para>
        /// Returns: <c>true</c> to allow normal system processing of the key event,
        /// or <c>false</c> to intercept and prevent default handling.
        /// </para>
        /// </param>
        public void RemoveGlobalKeyboardCallback(Func<int, int, SpecialKeyState, bool> callback);

        /// <summary>
        /// Fuzzy Search the string with the given query. This is the core search mechanism Flow uses
        /// </summary>
        /// <param name="query">Query string</param>
        /// <param name="stringToCompare">The string that will be compared against the query</param>
        /// <returns>Match results</returns>
        MatchResult FuzzySearch(string query, string stringToCompare);

        /// <summary>
        /// Http download the specific url and return as string
        /// </summary>
        /// <param name="url">URL to call Http Get</param>
        /// <param name="token">Cancellation Token</param>
        /// <returns>Task to get string result</returns>
        Task<string> HttpGetStringAsync(string url, CancellationToken token = default);

        /// <summary>
        /// Http download the specific url and return as stream
        /// </summary>
        /// <param name="url">URL to call Http Get</param>
        /// <param name="token">Cancellation Token</param>
        /// <returns>Task to get stream result</returns>
        Task<Stream> HttpGetStreamAsync(string url, CancellationToken token = default);

        /// <summary>
        /// Download the specific url to a cretain file path
        /// </summary>
        /// <param name="url">URL to download file</param>
        /// <param name="filePath">path to save downloaded file</param>
        /// <param name="reportProgress">
        /// Action to report progress. The input of the action is the progress value which is a double value between 0 and 100.
        /// It will be called if url support range request and the reportProgress is not null.
        /// </param>
        /// <param name="token">place to store file</param>
        /// <returns>Task showing the progress</returns>
        Task HttpDownloadAsync([NotNull] string url, [NotNull] string filePath, Action<double> reportProgress = null, CancellationToken token = default);

        /// <summary>
        /// Add ActionKeyword and update action keyword metadata for specific plugin.
        /// Before adding, please check if action keyword is already assigned by <see cref="ActionKeywordAssigned"/>
        /// </summary>
        /// <param name="pluginId">ID for plugin that needs to add action keyword</param>
        /// <param name="newActionKeyword">The actionkeyword that is supposed to be added</param>
        /// <remarks>
        /// If new action keyword contains any whitespace, FL will still add it but it will not work for users.
        /// So plugin should check the whitespace before calling this function.
        /// </remarks>
        void AddActionKeyword(string pluginId, string newActionKeyword);

        /// <summary>
        /// Remove ActionKeyword and update action keyword metadata for specific plugin
        /// </summary>
        /// <param name="pluginId">ID for plugin that needs to remove action keyword</param>
        /// <param name="oldActionKeyword">The actionkeyword that is supposed to be removed</param>
        void RemoveActionKeyword(string pluginId, string oldActionKeyword);

        /// <summary>
        /// Check whether specific ActionKeyword is assigned to any of the plugin
        /// </summary>
        /// <param name="actionKeyword">The actionkeyword for checking</param>
        /// <returns>True if the actionkeyword is already assigned, False otherwise</returns>
        bool ActionKeywordAssigned(string actionKeyword);

        /// <summary>
        /// Log debug message
        /// Message will only be logged in Debug mode
        /// </summary>
        void LogDebug(string className, string message, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log info message
        /// </summary>
        void LogInfo(string className, string message, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log warning message
        /// </summary>
        void LogWarn(string className, string message, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log error message. Preferred error logging method for plugins.
        /// </summary>
        void LogError(string className, string message, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log an Exception. Will throw if in debug mode so developer will be aware,
        /// otherwise logs the eror message. This is the primary logging method used for Flow
        /// </summary>
        void LogException(string className, string message, Exception e, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Load JsonStorage for current plugin's setting. This is the method used to load settings from json in Flow.
        /// When the file is not exist, it will create a new instance for the specific type.
        /// </summary>
        /// <typeparam name="T">Type for deserialization</typeparam>
        /// <returns></returns>
        T LoadSettingJsonStorage<T>() where T : new();

        /// <summary>
        /// Save JsonStorage for current plugin's setting. This is the method used to save settings to json in Flow.
        /// This method will save the original instance loaded with LoadJsonStorage.
        /// This API call is for manually Save.
        /// Flow will automatically save all setting type that has called <see cref="LoadSettingJsonStorage"/> or <see cref="SaveSettingJsonStorage"/> previously.
        /// </summary>
        /// <typeparam name="T">Type for Serialization</typeparam>
        /// <returns></returns>
        void SaveSettingJsonStorage<T>() where T : new();

        /// <summary>
        /// Open directory in an explorer configured by user via Flow's Settings. The default is Windows Explorer
        /// </summary>
        /// <param name="DirectoryPath">Directory Path to open</param>
        /// <param name="FileNameOrFilePath">Extra FileName Info</param>
        public void OpenDirectory(string DirectoryPath, string FileNameOrFilePath = null);

        /// <summary>
        /// Opens the URL using the browser with the given Uri object, even if the URL is a local file.
        /// The browser and mode used is based on what's configured in Flow's default browser settings.
        /// </summary>
        public void OpenWebUrl(Uri url, bool? inPrivate = null);

        /// <summary>
        /// Opens the URL using the browser with the given string, even if the URL is a local file.
        /// The browser and mode used is based on what's configured in Flow's default browser settings.
        /// Non-C# plugins should use this method.
        /// </summary>
        public void OpenWebUrl(string url, bool? inPrivate = null);

        /// <summary>
        /// Opens the URL with the given Uri object in browser if scheme is Http or Https.
        /// If the URL is a local file, it will instead be opened with the default application for that file type.
        /// The browser and mode used is based on what's configured in Flow's default browser settings.
        /// </summary>
        public void OpenUrl(Uri url, bool? inPrivate = null);

        /// <summary>
        /// Opens the URL with the given string in browser if scheme is Http or Https.
        /// If the URL is a local file, it will instead be opened with the default application for that file type.
        /// The browser and mode used is based on what's configured in Flow's default browser settings.
        /// Non-C# plugins should use this method.
        /// </summary>
        public void OpenUrl(string url, bool? inPrivate = null);

        /// <summary>
        /// Opens the application URI with the given Uri object, e.g. obsidian://search-query-example
        /// </summary>
        public void OpenAppUri(Uri appUri);

        /// <summary>
        /// Opens the application URI with the given string, e.g. obsidian://search-query-example
        /// Non-C# plugins should use this method
        /// </summary>
        public void OpenAppUri(string appUri);

        /// <summary>
        /// Toggles Game Mode. off -> on and backwards
        /// </summary>
        public void ToggleGameMode();

        /// <summary>
        /// Switches Game Mode to given value
        /// </summary>
        /// <param name="value">New Game Mode status</param>
        public void SetGameMode(bool value);

        /// <summary>
        /// Representing Game Mode status
        /// </summary>
        /// <returns></returns>
        public bool IsGameModeOn();

        /// <summary>
        /// Reloads the query.
        /// When current results are from context menu or history, it will go back to query results before re-querying.
        /// </summary>
        /// <param name="reselect">Choose the first result after reload if true; keep the last selected result if false. Default is true.</param>
        public void ReQuery(bool reselect = true);

        /// <summary>
        /// Back to the query results.
        /// This method should run when selected item is from context menu or history.
        /// </summary>
        public void BackToQueryResults();

        /// <summary>
        /// Displays a standardised Flow message box.
        /// </summary>
        /// <param name="messageBoxText">The message of the message box.</param>
        /// <param name="caption">The caption of the message box.</param>
        /// <param name="button">Specifies which button or buttons to display.</param>
        /// <param name="icon">Specifies the icon to display.</param>
        /// <param name="defaultResult">Specifies the default result of the message box.</param>
        /// <returns>Specifies which message box button is clicked by the user.</returns>
        public MessageBoxResult ShowMsgBox(string messageBoxText, string caption = "", MessageBoxButton button = MessageBoxButton.OK, MessageBoxImage icon = MessageBoxImage.None, MessageBoxResult defaultResult = MessageBoxResult.OK);

        /// <summary>
        /// Displays a standardised Flow progress box.
        /// </summary>
        /// <param name="caption">The caption of the progress box.</param>
        /// <param name="reportProgressAsync">
        /// Time-consuming task function, whose input is the action to report progress.
        /// The input of the action is the progress value which is a double value between 0 and 100.
        /// If there are any exceptions, this action will be null.
        /// </param>
        /// <param name="cancelProgress">When user cancel the progress, this action will be called.</param>
        /// <returns></returns>
        public Task ShowProgressBoxAsync(string caption, Func<Action<double>, Task> reportProgressAsync, Action cancelProgress = null);

        /// <summary>
        /// Start the loading bar in main window
        /// </summary>
        public void StartLoadingBar();

        /// <summary>
        /// Stop the loading bar in main window
        /// </summary>
        public void StopLoadingBar();

        /// <summary>
        /// Get all available themes
        /// </summary>
        /// <returns></returns>
        public List<ThemeData> GetAvailableThemes();

        /// <summary>
        /// Get the current theme
        /// </summary>
        /// <returns></returns>
        public ThemeData GetCurrentTheme();

        /// <summary>
        /// Set the current theme
        /// </summary>
        /// <param name="theme"></param>
        /// <returns>
        /// True if the theme is set successfully, false otherwise.
        /// </returns>
        public bool SetCurrentTheme(ThemeData theme);

        /// <summary>
        /// Save all Flow's plugins caches
        /// </summary>
        void SavePluginCaches();

        /// <summary>
        /// Load BinaryStorage for current plugin's cache. This is the method used to load cache from binary in Flow.
        /// When the file is not exist, it will create a new instance for the specific type.
        /// </summary>
        /// <typeparam name="T">Type for deserialization</typeparam>
        /// <param name="cacheName">Cache file name</param>
        /// <param name="cacheDirectory">Cache directory from plugin metadata</param>
        /// <param name="defaultData">Default data to return</param>
        /// <returns></returns>
        /// <remarks>
        /// BinaryStorage utilizes MemoryPack, which means the object must be MemoryPackSerializable <see href="https://github.com/Cysharp/MemoryPack"/>
        /// </remarks>
        Task<T> LoadCacheBinaryStorageAsync<T>(string cacheName, string cacheDirectory, T defaultData) where T : new();

        /// <summary>
        /// Save BinaryStorage for current plugin's cache. This is the method used to save cache to binary in Flow.
        /// This method will save the original instance loaded with LoadCacheBinaryStorageAsync.
        /// This API call is for manually Save.
        /// Flow will automatically save all cache type that has called <see cref="LoadCacheBinaryStorageAsync"/> or <see cref="SaveCacheBinaryStorageAsync"/> previously.
        /// </summary>
        /// <typeparam name="T">Type for Serialization</typeparam>
        /// <param name="cacheName">Cache file name</param>
        /// <param name="cacheDirectory">Cache directory from plugin metadata</param>
        /// <returns></returns>
        /// <remarks>
        /// BinaryStorage utilizes MemoryPack, which means the object must be MemoryPackSerializable <see href="https://github.com/Cysharp/MemoryPack"/>
        /// </remarks>
        Task SaveCacheBinaryStorageAsync<T>(string cacheName, string cacheDirectory) where T : new();

        /// <summary>
        /// Load image from path.
        /// Support local, remote and data:image url.
        /// Support png, jpg, jpeg, gif, bmp, tiff, ico, svg image files.
        /// If image path is missing, it will return a missing icon.
        /// </summary>
        /// <param name="path">The path of the image.</param>
        /// <param name="loadFullImage">
        /// Load full image or not.
        /// </param>
        /// <param name="cacheImage">
        /// Cache the image or not. Cached image will be stored in FL cache.
        /// If the image is just used one time, it's better to set this to false.
        /// </param>
        /// <returns></returns>
        ValueTask<ImageSource> LoadImageAsync(string path, bool loadFullImage = false, bool cacheImage = true);

        /// <summary>
        /// Update the plugin manifest
        /// </summary>
        /// <param name="usePrimaryUrlOnly">
        /// FL has multiple urls to download the plugin manifest. Set this to true to only use the primary url.
        /// </param>
        /// <param name="token"></param>
        /// <returns>True if the manifest is updated successfully, false otherwise</returns>
        public Task<bool> UpdatePluginManifestAsync(bool usePrimaryUrlOnly = false, CancellationToken token = default);

        /// <summary>
        /// Get the current plugin manifest entries known to Flow Launcher.
        /// </summary>
        /// <returns>
        /// A non-null read-only list of <see cref="UserPlugin"/> entries. The list may be empty if the
        /// manifest has not been loaded yet, or if no successful manifest fetch has completed in the current session.
        /// </returns>
        public IReadOnlyList<UserPlugin> GetPluginManifest();

        /// <summary>
        /// Check if the plugin has been modified.
        /// If this plugin is updated, installed or uninstalled and users do not restart the app,
        /// it will be marked as modified
        /// </summary>
        /// <param name="id">Plugin id</param>
        /// <returns></returns>
        public bool PluginModified(string id);

        /// <summary>
        /// Update a plugin to new version, from a zip file. By default will remove the zip file if update is via url,
        /// unless it's a local path installation
        /// </summary>
        /// <param name="pluginMetadata">The metadata of the old plugin to update</param>
        /// <param name="plugin">The new plugin to update</param>
        /// <param name="zipFilePath">
        /// Path to the zip file containing the plugin. It will be unzipped to the temporary directory, removed and installed.
        /// </param>
        /// <returns>
        /// True if the plugin is updated successfully, false otherwise.
        /// </returns>
        public Task<bool> UpdatePluginAsync(PluginMetadata pluginMetadata, UserPlugin plugin, string zipFilePath);

        /// <summary>
        /// Install a plugin. By default will remove the zip file if installation is from url,
        /// unless it's a local path installation
        /// </summary>
        /// <param name="plugin">The plugin to install</param>
        /// <param name="zipFilePath">
        /// Path to the zip file containing the plugin. It will be unzipped to the temporary directory, removed and installed.
        /// </param>
        /// <returns>
        /// True if the plugin is installed successfully, false otherwise.
        /// </returns>
        public bool InstallPlugin(UserPlugin plugin, string zipFilePath);

        /// <summary>
        /// Uninstall a plugin
        /// </summary>
        /// <param name="pluginMetadata">The metadata of the plugin to uninstall</param>
        /// <param name="removePluginSettings">
        /// Plugin has their own settings. If this is set to true, the plugin settings will be removed.
        /// </param>
        /// <returns>
        /// True if the plugin is updated successfully, false otherwise.
        /// </returns>
        public Task<bool> UninstallPluginAsync(PluginMetadata pluginMetadata, bool removePluginSettings = false);

        /// <summary>
        /// Log debug message of the time taken to execute a method
        /// Message will only be logged in Debug mode
        /// </summary>
        /// <returns>The time taken to execute the method in milliseconds</returns>
        public long StopwatchLogDebug(string className, string message, Action action, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log debug message of the time taken to execute a method asynchronously
        /// Message will only be logged in Debug mode
        /// </summary>
        /// <returns>The time taken to execute the method in milliseconds</returns>
        public Task<long> StopwatchLogDebugAsync(string className, string message, Func<Task> action, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log info message of the time taken to execute a method
        /// </summary>
        /// <returns>The time taken to execute the method in milliseconds</returns>
        public long StopwatchLogInfo(string className, string message, Action action, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Log info message of the time taken to execute a method asynchronously
        /// </summary>
        /// <returns>The time taken to execute the method in milliseconds</returns>
        public Task<long> StopwatchLogInfoAsync(string className, string message, Func<Task> action, [CallerMemberName] string methodName = "");

        /// <summary>
        /// Representing whether the application is using a dark theme
        /// </summary>
        /// <returns></returns>
        bool IsApplicationDarkTheme();

        /// <summary>
        /// Invoked when the actual theme of the application has changed. Currently, the plugin will continue to be subscribed even if it is turned off.
        /// </summary>
        event ActualApplicationThemeChangedEventHandler ActualApplicationThemeChanged;

        /// <summary>
        /// Get the user data directory of Flow Launcher.
        /// </summary>
        /// <returns></returns>
        string GetDataDirectory();

        /// <summary>
        /// Get the log directory of Flow Launcher.
        /// </summary>
        /// <returns></returns>
        string GetLogDirectory();

        /// <summary>
        /// Invoked when the behavior of string matcher has changed which can effect the result of <see cref="MatchResult"/>.
        /// </summary>
        event EventHandler StringMatcherBehaviorChanged;
    }
}