/// <summary>
/// Constructs an instance of the Chakra JsRT JavaScript engine
/// </summary>
/// <param name="engineMode">JavaScript engine mode</param>
/// <param name="enableDebugging">Flag for whether to enable script debugging features</param>
protected ChakraJsRtJsEngineBase(JsEngineMode engineMode, bool enableDebugging)
{
_engineMode = engineMode;
_engineModeName = JsEngineModeHelpers.GetModeName(engineMode);
_enableDebugging = enableDebugging;
#if NETSTANDARD1_3
_externalObjectFinalizeCallback = ExternalObjectFinalizeCallback;
#endif
}
/// <summary>
/// Constructs an instance of the ActiveScript JavaScript engine
/// </summary>
/// <param name="clsid">CLSID of JavaScript engine</param>
/// <param name="engineMode">JavaScript engine mode</param>
/// <param name="lowerIeVersion">Lowest supported version of Internet Explorer</param>
/// <param name="languageVersion">Version of script language</param>
/// <param name="useEcmaScript5Polyfill">Flag for whether to use the ECMAScript 5 Polyfill</param>
/// <param name="useJson2Library">Flag for whether to use the JSON2 library</param>
protected ActiveScriptJsEngineBase(string clsid, JsEngineMode engineMode, string lowerIeVersion,
ScriptLanguageVersion languageVersion, bool useEcmaScript5Polyfill, bool useJson2Library)
{
_engineMode = engineMode;
_engineModeName = JsEngineModeHelpers.GetModeName(engineMode);
_documentVersion = DateTime.UtcNow.ToString("o");
_dispatcher.Invoke(() =>
{
_pActiveScript = IntPtr.Zero;
try
{
_pActiveScript = ComHelpers.CreateInstanceByClsid <IActiveScript>(clsid);
_activeScript = (IActiveScript)Marshal.GetObjectForIUnknown(_pActiveScript);
}
catch (Exception e)
{
throw new JsEngineLoadException(
string.Format(CommonStrings.Runtime_IeJsEngineNotLoaded,
_engineModeName, lowerIeVersion, e.Message), _engineModeName);
}
if (languageVersion != ScriptLanguageVersion.None)
{
var activeScriptProperty = _activeScript as IActiveScriptProperty;
if (activeScriptProperty != null)
{
object scriptLanguageVersion = (int)languageVersion;
uint result = activeScriptProperty.SetProperty((uint)ScriptProperty.InvokeVersioning,
IntPtr.Zero, ref scriptLanguageVersion);
if (result != (uint)ScriptHResult.Ok)
{
throw new JsEngineLoadException(
string.Format(NetFrameworkStrings.Runtime_ActiveScriptLanguageVersionSelectionFailed, languageVersion));
}
}
}
_activeScriptParse = new ActiveScriptParseWrapper(_pActiveScript, _activeScript);
_activeScriptParse.InitNew();
_pActiveScriptGarbageCollector = ComHelpers.QueryInterfaceNoThrow <IActiveScriptGarbageCollector>(_pActiveScript);
_activeScriptGarbageCollector = _activeScript as IActiveScriptGarbageCollector;
_activeScript.SetScriptSite(this);
_activeScript.SetScriptState(ScriptState.Started);
InitScriptDispatch();
});
LoadResources(useEcmaScript5Polyfill, useJson2Library);
}
/// <summary>
/// Constructs instance of MSIE JavaScript engine
/// </summary>
/// <param name="settings">JavaScript engine settings</param>
/// <exception cref="MsieJavaScriptEngine.JsEngineLoadException">Failed to load a JavaScript engine.</exception>
/// <exception cref="System.NotSupportedException">Selected mode of JavaScript engine is not supported.</exception>
public MsieJsEngine(JsEngineSettings settings)
{
JsEngineMode engineMode = settings.EngineMode;
JsEngineMode processedEngineMode = engineMode;
if (engineMode == JsEngineMode.Auto)
{
if (ChakraEdgeJsRtJsEngine.IsSupported())
{
processedEngineMode = JsEngineMode.ChakraEdgeJsRt;
}
else if (ChakraIeJsRtJsEngine.IsSupported())
{
processedEngineMode = JsEngineMode.ChakraIeJsRt;
}
#if !NETSTANDARD1_3
else if (ChakraActiveScriptJsEngine.IsSupported())
{
processedEngineMode = JsEngineMode.ChakraActiveScript;
}
else if (ClassicActiveScriptJsEngine.IsSupported())
{
processedEngineMode = JsEngineMode.Classic;
}
#endif
else
{
throw new JsEngineLoadException(
#if NETSTANDARD1_3
NetCoreStrings.Runtime_JsEnginesNotFound
#else
NetFrameworkStrings.Runtime_JsEnginesNotFound
#endif
);
}
}
lock (_creationSynchronizer)
{
JsEngineMode previousMode = _currentMode;
switch (processedEngineMode)
{
case JsEngineMode.ChakraEdgeJsRt:
if (previousMode != JsEngineMode.ChakraIeJsRt &&
previousMode != JsEngineMode.ChakraActiveScript)
{
_jsEngine = new ChakraEdgeJsRtJsEngine(settings.EnableDebugging);
}
else if (previousMode == JsEngineMode.ChakraIeJsRt)
{
throw new JsEngineLoadException(
string.Format(
CommonStrings.Runtime_JsEnginesConflictInProcess,
JsEngineModeHelpers.GetModeName(processedEngineMode),
JsEngineModeHelpers.GetModeName(previousMode)
)
);
}
else if (previousMode == JsEngineMode.ChakraActiveScript)
{
throw new JsEngineLoadException(
string.Format(
CommonStrings.Runtime_JsEnginesConflictInProcess,
JsEngineModeHelpers.GetModeName(processedEngineMode),
JsEngineModeHelpers.GetModeName(previousMode)
)
);
}
break;
case JsEngineMode.ChakraIeJsRt:
if (previousMode != JsEngineMode.ChakraEdgeJsRt)
{
_jsEngine = new ChakraIeJsRtJsEngine(settings.EnableDebugging);
}
else
{
throw new JsEngineLoadException(
string.Format(
CommonStrings.Runtime_JsEnginesConflictInProcess,
JsEngineModeHelpers.GetModeName(processedEngineMode),
JsEngineModeHelpers.GetModeName(previousMode)
)
);
}
break;
case JsEngineMode.ChakraActiveScript:
#if !NETSTANDARD1_3
if (previousMode != JsEngineMode.ChakraEdgeJsRt)
{
_jsEngine = new ChakraActiveScriptJsEngine();
}
else
{
throw new JsEngineLoadException(
string.Format(
CommonStrings.Runtime_JsEnginesConflictInProcess,
JsEngineModeHelpers.GetModeName(processedEngineMode),
JsEngineModeHelpers.GetModeName(previousMode)
)
);
}
break;
#else
throw new NotSupportedException(
string.Format(NetCoreStrings.Runtime_JsEngineModeNotCompatibleWithNetCore, processedEngineMode));
#endif
case JsEngineMode.Classic:
#if !NETSTANDARD1_3
_jsEngine = new ClassicActiveScriptJsEngine(settings.UseEcmaScript5Polyfill,
settings.UseJson2Library);
break;
#else
throw new NotSupportedException(
string.Format(NetCoreStrings.Runtime_JsEngineModeNotCompatibleWithNetCore, processedEngineMode));
#endif
default:
throw new NotSupportedException(
string.Format(CommonStrings.Runtime_JsEngineModeNotSupported, processedEngineMode));
}
_currentMode = processedEngineMode;
}
}
/// <summary>
/// Constructs an instance of the inner JS engine
/// </summary>
/// <param name="engineMode">JS engine mode</param>
protected InnerJsEngineBase(JsEngineMode engineMode)
{
_engineMode = engineMode;
_engineModeName = JsEngineModeHelpers.GetModeName(engineMode);
}
