public Extension(String path)
{
_extensionPath = path;
_engine = new ScriptEngine();
_watcher = new FileSystemWatcher(path) { EnableRaisingEvents = true };
_watcher.Changed += _watcher_Changed;
String entryPoint = Path.Combine(path, "extension.js");
if (!File.Exists(entryPoint)) {
throw new Exception("Extension must contain an extension.js file.");
}
var files = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories).ToList();
foreach (var filePath in files) {
var file = new FileInfo(filePath);
_watchedFiles.Add(filePath, file.LastWriteTimeUtc);
}
_engine.SetNamedItem("lumen", new LumenScript(this));
try {
LoadScript(Path.Combine(path, @"..\common.js"));
_parsed = LoadScript(entryPoint);
__extension = new ParsedScript(_engine, _engine.Eval(_extensionIdent));
ExtensionManager.Current.Add(this);
}
catch (ScriptException ex) {
var s = _scripts.FromLineNumber(ex.Line);
ex.Line = s.TranslateLineNumber(ex.Line);
System.Windows.MessageBox.Show(ex.ErrorType + ": " + ex.Description + "\t\t\t" + s.Name + ":" + ex.Line);
}
}
/// <summary>
/// Evaluates an expression using the specified language, with an optional array of named items.
/// </summary>
/// <param name="language">The language.</param>
/// <param name="expression">The expression. May not be null.</param>
/// <param name="namedItems">The named items array.</param>
/// <returns>The result of the evaluation.</returns>
public static object Eval(string language, string expression, params KeyValuePair<string, object>[] namedItems)
{
if (language == null) {
throw new ArgumentNullException("language");
}
if (expression == null) {
throw new ArgumentNullException("expression");
}
using (ScriptEngine engine = new ScriptEngine()) {
if (namedItems != null) {
foreach (KeyValuePair<string, object> kvp in namedItems) {
engine.SetNamedItem(kvp.Key, kvp.Value);
}
}
return engine.Eval(expression);
}
}
internal ParsedScript(ScriptEngine engine, IntPtr dispatch)
{
this._engine = engine;
this._dispatch = Marshal.GetObjectForIUnknown(dispatch);
}
public ParsedScript(ScriptEngine engine, object dispatch)
{
this._engine = engine;
this._dispatch = dispatch;
}