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namespace System.Workflow.ComponentModel.Serialization
{
using System;
using System.IO;
using System.Xml;
using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.CodeDom.Compiler;
using System.Workflow.ComponentModel.Design;
using System.Workflow.ComponentModel.Compiler;
using System.Collections.Specialized;
using System.ComponentModel.Design.Serialization;
using System.CodeDom;
using System.ComponentModel;
using System.Globalization;
using System.Security.Cryptography;
using System.Text.RegularExpressions;
using System.Text;
using System.Diagnostics.CodeAnalysis;
internal static class StandardXomlKeys
{
internal const string WorkflowXmlNs = "http://schemas.microsoft.com/winfx/2006/xaml/workflow";
internal const string WorkflowPrefix = "wf";
internal const string CLRNamespaceQualifier = "clr-namespace:";
internal const string AssemblyNameQualifier = "Assembly=";
internal const string GlobalNamespace = "{Global}";
internal const string MarkupExtensionSuffix = "Extension";
internal const string Definitions_XmlNs = "http://schemas.microsoft.com/winfx/2006/xaml";
internal const string Definitions_XmlNs_Prefix = "x";
internal const string Definitions_Class_LocalName = "Class";
internal const string Definitions_Code_LocalName = "Code";
internal const string Definitions_ActivityVisible_LocalName = "Visible";
internal const string Definitions_ActivityEditable_LocalName = "Editable";
internal const string Definitions_Type_LocalName = "Type";
}
internal interface ITypeAuthorizer
{
bool IsTypeAuthorized(Type typeToAuthorize);
}
internal static class WorkflowMarkupSerializationHelpers
{
internal static string[] standardNamespaces = {
"System",
"System.Collections",
"System.ComponentModel",
"System.ComponentModel.Design",
"System.Collections.Generic",
"System.Workflow.ComponentModel",
"System.Workflow.Runtime",
"System.Workflow.Activities"
};
// This type authorizer is created by the WorkflowCompiler to check for allowed types during deserialization.
internal static ITypeAuthorizer TypeAuthorizer;
// This type authorizer is created by the WorkflowMarkupSerializer to check for disallowed types during deserialization.
// This is separate from TypeAuthorizer so that it applies to situations where the WorkflowCompiler is not involved, such
// as when the workflow designer is deserializing the XOML.
internal static ITypeAuthorizer SerializationTypeAuthorizer;
public static Activity LoadXomlDocument(WorkflowMarkupSerializationManager xomlSerializationManager, XmlReader textReader, string fileName)
{
if (xomlSerializationManager == null)
throw new ArgumentNullException("xomlSerializationManager");
Activity rootActivity = null;
try
{
xomlSerializationManager.Context.Push(fileName);
WorkflowMarkupSerializationHelpers.TypeAuthorizer = null;
rootActivity = new WorkflowMarkupSerializer().Deserialize(xomlSerializationManager, textReader) as Activity;
}
finally
{
xomlSerializationManager.Context.Pop();
}
return rootActivity;
}
internal static Activity LoadXomlDocument(WorkflowMarkupSerializationManager xomlSerializationManager, XmlReader textReader, string fileName, ITypeAuthorizer typeAuthorizer)
{
if (xomlSerializationManager == null)
throw new ArgumentNullException("xomlSerializationManager");
Activity rootActivity = null;
try
{
xomlSerializationManager.Context.Push(fileName);
WorkflowMarkupSerializationHelpers.TypeAuthorizer = typeAuthorizer;
rootActivity = new WorkflowMarkupSerializer().Deserialize(xomlSerializationManager, textReader) as Activity;
}
finally
{
xomlSerializationManager.Context.Pop();
}
return rootActivity;
}
[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal static void ProcessDefTag(WorkflowMarkupSerializationManager serializationManager, XmlReader reader, Activity activity, bool newSegment, string fileName)
{
System.Resources.ResourceManager resourceManager = new System.Resources.ResourceManager("System.Workflow.ComponentModel.StringResources", typeof(System.Workflow.ComponentModel.ActivityBind).Assembly);
if (reader.NodeType == XmlNodeType.Attribute)
{
switch (reader.LocalName)
{
case StandardXomlKeys.Definitions_Class_LocalName:
activity.SetValue(WorkflowMarkupSerializer.XClassProperty, reader.Value);
break;
default:
serializationManager.ReportError(new WorkflowMarkupSerializationException(string.Format(CultureInfo.CurrentCulture, resourceManager.GetString("UnknownDefinitionTag"), new object[] { StandardXomlKeys.Definitions_XmlNs_Prefix, reader.LocalName, StandardXomlKeys.Definitions_XmlNs }), (reader is IXmlLineInfo) ? ((IXmlLineInfo)reader).LineNumber : 1, (reader is IXmlLineInfo) ? ((IXmlLineInfo)reader).LinePosition : 1));
break;
}
return;
}
bool exitLoop = false;
bool isEmptyElement = reader.IsEmptyElement;
int initialDepth = reader.Depth;
do
{
XmlNodeType currNodeType = reader.NodeType;
switch (currNodeType)
{
case XmlNodeType.Element:
{
/*
if (!reader.LocalName.Equals(localName))
{
serializationManager.ReportError(new WorkflowMarkupSerializationException(string.Format(resourceManager.GetString("DefnTagsCannotBeNested"), "def", localName, reader.LocalName), reader.LineNumber, reader.LinePosition));
return;
}
*/
switch (reader.LocalName)
{
case StandardXomlKeys.Definitions_Code_LocalName:
break;
case "Constructor":
default:
serializationManager.ReportError(new WorkflowMarkupSerializationException(string.Format(CultureInfo.CurrentCulture, resourceManager.GetString("UnknownDefinitionTag"), StandardXomlKeys.Definitions_XmlNs_Prefix, reader.LocalName, StandardXomlKeys.Definitions_XmlNs), (reader is IXmlLineInfo) ? ((IXmlLineInfo)reader).LineNumber : 1, (reader is IXmlLineInfo) ? ((IXmlLineInfo)reader).LinePosition : 1));
return;
}
// if an empty element do a Reader then exit
if (isEmptyElement)
exitLoop = true;
break;
}
case XmlNodeType.EndElement:
{
//reader.Read();
if (reader.Depth == initialDepth)
exitLoop = true;
break;
}
case XmlNodeType.CDATA:
case XmlNodeType.Text:
{
//
int lineNumber = (reader is IXmlLineInfo) ? ((IXmlLineInfo)reader).LineNumber : 1;
int linePosition = (reader is IXmlLineInfo) ? ((IXmlLineInfo)reader).LinePosition : 1;
CodeSnippetTypeMember codeSegment = new CodeSnippetTypeMember(reader.Value);
codeSegment.LinePragma = new CodeLinePragma(fileName, Math.Max(lineNumber - 1, 1));
codeSegment.UserData[UserDataKeys.CodeSegment_New] = newSegment;
codeSegment.UserData[UserDataKeys.CodeSegment_ColumnNumber] = linePosition + reader.Name.Length - 1;
CodeTypeMemberCollection codeSegments = activity.GetValue(WorkflowMarkupSerializer.XCodeProperty) as CodeTypeMemberCollection;
if (codeSegments == null)
{
codeSegments = new CodeTypeMemberCollection();
activity.SetValue(WorkflowMarkupSerializer.XCodeProperty, codeSegments);
}
codeSegments.Add(codeSegment);
//}
/*else
{
serializationManager.ReportError( new WorkflowMarkupSerializationException(
string.Format(resourceManager.GetString("IllegalCDataTextScoping"),
"def",
reader.LocalName,
(currNodeType == XmlNodeType.CDATA ? resourceManager.GetString("CDATASection") : resourceManager.GetString("TextSection"))),
reader.LineNumber,
reader.LinePosition)
);
}
*/
break;
}
}
}
while (!exitLoop && reader.Read());
}
[SuppressMessage("Microsoft.Cryptographic.Standard", "CA5350:MD5CannotBeUsed",
Justification = "Design has been approved. We are not using MD5 for any security or cryptography purposes but rather as a hash.")]
internal static CodeNamespaceCollection GenerateCodeFromXomlDocument(Activity rootActivity, string filePath, string rootNamespace, SupportedLanguages language, IServiceProvider serviceProvider)
{
CodeNamespaceCollection codeNamespaces = new CodeNamespaceCollection();
CodeDomProvider codeDomProvider = CompilerHelpers.GetCodeDomProvider(language);
// generate activity class
string activityFullClassName = rootActivity.GetValue(WorkflowMarkupSerializer.XClassProperty) as string;
CodeTypeDeclaration activityTypeDeclaration = null;
if (codeDomProvider != null && !string.IsNullOrEmpty(activityFullClassName))
{
// get class and namespace names
string activityNamespaceName, activityClassName;
Helpers.GetNamespaceAndClassName(activityFullClassName, out activityNamespaceName, out activityClassName);
if (codeDomProvider.IsValidIdentifier(activityClassName))
{
DesignerSerializationManager designerSerializationManager = new DesignerSerializationManager(serviceProvider);
using (designerSerializationManager.CreateSession())
{
ActivityCodeDomSerializationManager codeDomSerializationManager = new ActivityCodeDomSerializationManager(designerSerializationManager);
TypeCodeDomSerializer typeCodeDomSerializer = codeDomSerializationManager.GetSerializer(rootActivity.GetType(), typeof(TypeCodeDomSerializer)) as TypeCodeDomSerializer;
// get all activities
bool generateCode = true;
ArrayList allActivities = new ArrayList();
allActivities.Add(rootActivity);
if (rootActivity is CompositeActivity)
{
foreach (Activity activity in Helpers.GetNestedActivities((CompositeActivity)rootActivity))
{
if (Helpers.IsActivityLocked(activity))
continue;
if (codeDomProvider.IsValidIdentifier(codeDomSerializationManager.GetName(activity)))
{
// WinOE Bug 14561. This is to fix a performance problem. When an activity is added to the activity
// tree at the runtime, it's much faster if the ID of the activity is already set. The code that
// the CodeDomSerializer generates will add the activity first before it sets the ID for the child
// activity. We can change that order by always serializing the children first. Therefore, we
// construct a list where we guarantee that the child will be serialized before its parent.
allActivities.Insert(0, activity);
}
else
{
generateCode = false;
break;
}
}
}
if (generateCode)
{
// Work around!! TypeCodeDomSerializer checks that root component has a site or not, otherwise it
// does not serialize it look at ComponentTypeCodeDomSerializer.cs
DummySite dummySite = new DummySite();
foreach (Activity nestedActivity in allActivities)
((IComponent)nestedActivity).Site = dummySite;
((IComponent)rootActivity).Site = dummySite;
// create activity partial class
activityTypeDeclaration = typeCodeDomSerializer.Serialize(codeDomSerializationManager, rootActivity, allActivities);
activityTypeDeclaration.IsPartial = true;
// add checksum attribute
if (filePath != null && filePath.Length > 0)
{
byte[] checksumBytes = null;
HashAlgorithm hashAlgorithm = null;
if (System.Workflow.ComponentModel.LocalAppContextSwitches.UseLegacyHashForXomlFileChecksum)
{
hashAlgorithm = new MD5CryptoServiceProvider();
}
else
{
hashAlgorithm = new SHA256CryptoServiceProvider();
}
using (StreamReader streamReader = new StreamReader(filePath))
checksumBytes = hashAlgorithm.ComputeHash(streamReader.BaseStream);
// Only use the first 16 bytes of the resulting hash byte[];
string checksum = string.Format(CultureInfo.InvariantCulture, "{0}{1}{2}{3}{4}{5}{6}{7}{8}{9}{10}{11}{12}{13}{14}{15}", new object[] { checksumBytes[0].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[1].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[2].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[3].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[4].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[5].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[6].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[7].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[8].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[9].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[10].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[11].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[12].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[13].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[14].ToString("X2", CultureInfo.InvariantCulture), checksumBytes[15].ToString("X2", CultureInfo.InvariantCulture) });
CodeAttributeDeclaration xomlSourceAttribute = new CodeAttributeDeclaration(typeof(WorkflowMarkupSourceAttribute).FullName);
xomlSourceAttribute.Arguments.Add(new CodeAttributeArgument(new CodePrimitiveExpression(filePath)));
xomlSourceAttribute.Arguments.Add(new CodeAttributeArgument(new CodePrimitiveExpression(checksum)));
activityTypeDeclaration.CustomAttributes.Add(xomlSourceAttribute);
}
// create a new namespace and add activity class into that
CodeNamespace activityCodeNamespace = new CodeNamespace(activityNamespaceName);
activityCodeNamespace.Types.Add(activityTypeDeclaration);
codeNamespaces.Add(activityCodeNamespace);
}
}
}
}
// generate code for x:Code
if (activityTypeDeclaration != null)
{
Queue activitiesQueue = new Queue(new object[] { rootActivity });
while (activitiesQueue.Count > 0)
{
Activity activity = (Activity)activitiesQueue.Dequeue();
if (Helpers.IsActivityLocked(activity))
continue;
Queue childActivities = new Queue(new object[] { activity });
while (childActivities.Count > 0)
{
Activity childActivity = (Activity)childActivities.Dequeue();
if (childActivity is CompositeActivity)
{
foreach (Activity nestedChildActivity in ((CompositeActivity)childActivity).Activities)
{
childActivities.Enqueue(nestedChildActivity);
}
}
// generate x:Code
CodeTypeMemberCollection codeSegments = childActivity.GetValue(WorkflowMarkupSerializer.XCodeProperty) as CodeTypeMemberCollection;
if (codeSegments != null)
{
foreach (CodeSnippetTypeMember codeSegmentMember in codeSegments)
activityTypeDeclaration.Members.Add(codeSegmentMember);
}
}
}
if (language == SupportedLanguages.CSharp)
activityTypeDeclaration.LinePragma = new CodeLinePragma((string)rootActivity.GetValue(ActivityCodeDomSerializer.MarkupFileNameProperty), Math.Max((int)rootActivity.GetValue(ActivityMarkupSerializer.StartLineProperty), 1));
//Now make sure we that we also emit line pragma around the constructor
CodeConstructor constructor = null;
CodeMemberMethod method = null;
foreach (CodeTypeMember typeMember in activityTypeDeclaration.Members)
{
if (constructor == null && typeMember is CodeConstructor)
constructor = typeMember as CodeConstructor;
if (method == null && typeMember is CodeMemberMethod && typeMember.Name.Equals("InitializeComponent", StringComparison.Ordinal))
method = typeMember as CodeMemberMethod;
if (constructor != null && method != null)
break;
}
if (constructor != null)
constructor.LinePragma = new CodeLinePragma((string)rootActivity.GetValue(ActivityCodeDomSerializer.MarkupFileNameProperty), Math.Max((int)rootActivity.GetValue(ActivityMarkupSerializer.StartLineProperty), 1));
if (method != null && language == SupportedLanguages.CSharp)
method.LinePragma = new CodeLinePragma((string)rootActivity.GetValue(ActivityCodeDomSerializer.MarkupFileNameProperty), Math.Max((int)rootActivity.GetValue(ActivityMarkupSerializer.StartLineProperty), 1));
}
// generate mappings
List<String> clrNamespaces = rootActivity.GetValue(WorkflowMarkupSerializer.ClrNamespacesProperty) as List<String>;
if (clrNamespaces != null)
{
// foreach namespace add these mappings
foreach (CodeNamespace codeNamespace in codeNamespaces)
{
foreach (string clrNamespace in clrNamespaces)
{
if (!String.IsNullOrEmpty(clrNamespace))
{
CodeNamespaceImport codeNamespaceImport = new CodeNamespaceImport(clrNamespace);
codeNamespaceImport.LinePragma = new CodeLinePragma((string)rootActivity.GetValue(ActivityCodeDomSerializer.MarkupFileNameProperty), Math.Max((int)rootActivity.GetValue(ActivityMarkupSerializer.StartLineProperty), 1));
codeNamespace.Imports.Add(codeNamespaceImport);
}
}
}
}
// return namespaces
return codeNamespaces;
}
internal static void FixStandardNamespacesAndRootNamespace(CodeNamespaceCollection codeNamespaces, string rootNS, SupportedLanguages language)
{
// add the standard imports to all the namespaces.
if (language == SupportedLanguages.VB)
{
foreach (CodeNamespace codeNamespace in codeNamespaces)
{
if (codeNamespace.Name == rootNS)
{
codeNamespace.Name = string.Empty;
codeNamespace.UserData.Add("TruncatedNamespace", null);
}
else if (codeNamespace.Name.StartsWith(rootNS + ".", StringComparison.Ordinal))
{
codeNamespace.Name = codeNamespace.Name.Substring(rootNS.Length + 1);
codeNamespace.UserData.Add("TruncatedNamespace", null);
}
}
}
foreach (CodeNamespace codeNamespace in codeNamespaces)
{
Hashtable definedNamespaces = new Hashtable();
foreach (CodeNamespaceImport codeNamespaceImport in codeNamespace.Imports)
definedNamespaces.Add(codeNamespaceImport.Namespace, codeNamespaceImport);
foreach (string standardNS in standardNamespaces)
if (!definedNamespaces.Contains(standardNS))//add only new imports
codeNamespace.Imports.Add(new CodeNamespaceImport(standardNS));
}
}
[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal static void ReapplyRootNamespace(CodeNamespaceCollection codeNamespaces, string rootNS, SupportedLanguages language)
{
if (language == SupportedLanguages.VB)
{
foreach (CodeNamespace codeNamespace in codeNamespaces)
{
if (codeNamespace.UserData.Contains("TruncatedNamespace"))
{
if (codeNamespace.Name == null || codeNamespace.Name.Length == 0)
codeNamespace.Name = rootNS;
else if (codeNamespace.Name.StartsWith(rootNS + ".", StringComparison.Ordinal))
codeNamespace.Name = rootNS + "." + codeNamespace.Name;
codeNamespace.UserData.Remove("TruncatedNamespace");
}
}
}
}
#region Event Support
[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal static string GetEventHandlerName(object owner, string eventName)
{
string handler = null;
DependencyObject dependencyObject = owner as DependencyObject;
if (!string.IsNullOrEmpty(eventName) && owner != null && dependencyObject != null)
{
if (dependencyObject.GetValue(WorkflowMarkupSerializer.EventsProperty) != null)
{
Hashtable dynamicEvents = dependencyObject.GetValue(WorkflowMarkupSerializer.EventsProperty) as Hashtable;
if (dynamicEvents != null && dynamicEvents.ContainsKey(eventName))
handler = dynamicEvents[eventName] as string;
}
}
return handler;
}
[SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal static void SetEventHandlerName(object owner, string eventName, string value)
{
DependencyObject dependencyObject = owner as DependencyObject;
if (!string.IsNullOrEmpty(eventName) && owner != null && dependencyObject != null)
{
if (dependencyObject.GetValue(WorkflowMarkupSerializer.EventsProperty) == null)
dependencyObject.SetValue(WorkflowMarkupSerializer.EventsProperty, new Hashtable());
Hashtable dynamicEvents = dependencyObject.GetValue(WorkflowMarkupSerializer.EventsProperty) as Hashtable;
dynamicEvents[eventName] = value;
}
}
#endregion
private class DummySite : ISite
{
public IComponent Component { get { return null; } }
public IContainer Container { get { return null; } }
public bool DesignMode { get { return true; } }
public string Name { get { return string.Empty; } set { } }
public object GetService(Type type) { return null; }
}
}
}
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