/// <summary>
/// Creates a new language specific engine based upon the language specified
/// </summary>
/// <param name="language">The language that the engine should support</param>
/// <returns></returns>
protected VsaEngine CreateLanguageSpecificEngine(VsaScriptingLanguages language)
{
VsaEngine engine = null;
switch (language)
{
//case VsaScriptingLanguages.VBScript:
// use the vbscript engine provided in the assembly Microsoft.VisualBasic.Vsa.dll
// engine = new Microsoft.VisualBasic.Vsa.VsaEngine();
// break;
case VsaScriptingLanguages.JScript:
// use the jscript engine provided in the assembly Microsoft.JScript.dll
engine = new Microsoft.JScript.Vsa.VsaEngine();
break;
default:
// the language specified is not supported
throw new VsaScriptingLanguageNotSupportedException(language);
};
return engine;
}
/// <summary>
/// Selects the appropriate language based upon the file extension
/// </summary>
/// <param name="info"></param>
/// <param name="language"></param>
/// <returns></returns>
public bool SelectLanguageBasedOnExtension(FileInfo info, out VsaScriptingLanguages language)
{
// default the language type to none
language = VsaScriptingLanguages.None;
if (string.Compare(info.Extension, @".js", true) == 0)
{
language = VsaScriptingLanguages.JScript;
return true;
}
else if (string.Compare(info.Extension, @".vb", true) == 0)
{
language = VsaScriptingLanguages.VBScript;
return true;
}
return false;
}
/// <summary>a
/// Initializes a new instance of the VsaScriptingHost class
/// </summary>
/// <param name="language">The language used by this scripting host</param>
/// <param name="name">The name of the engine used by the scripting host</param>
/// <param name="rootMoniker">The root moniker of the engine used by the scripting host</param>
/// <param name="rootNamespace">The root namespace of the engine used by the scripting host</param>
/// <param name="generateDebugInfo">A flag that indicates whether the engine should generate debugging information</param>
public VsaScriptingHost(VsaScriptingLanguages language, string name, string rootMoniker, string rootNamespace, bool generateDebugInfo)
{
// create a new hashtable for storing global items so that we can look them up as needed
_globalItemLookupTable = new Hashtable();
_language = language;
// create an engine aligned to the language specified (currently only JScript and VBScript are supported)
_engine = ((object)this.CreateLanguageSpecificEngine(language)) as IVsaEngine;
_engine.RootMoniker = rootMoniker;
SetEngine(_engine);
SetUpEngine(name, rootMoniker, rootNamespace, generateDebugInfo);
}
/// <summary>
/// Initializes a new instance of the VsaScriptingLanguageNotSupportedException class
/// </summary>
/// <param name="language"></param>
public VsaScriptingLanguageNotSupportedException(VsaScriptingLanguages language)
: base(string.Format("The language '{0}' is not supported.", language.ToString()))
{
_language = language;
}