/// <summary>
/// Writes an implementation of the <see cref="IDataSourceWrapper"/> interface.
/// </summary>
/// <param name="dataSourceWrapperInfo">A <see cref="DataSourceWrapperInfo"/> describing the data source wrapper for which to write an <see cref="IDataSourceWrapper"/> implementation.</param>
public void WriteIDataSourceWrapperImplementation(DataSourceWrapperInfo dataSourceWrapperInfo)
{
WriteLine("public override Object WrappedDataSource");
WriteLine("{");
WriteLine("get { return value; }");
WriteLine("}");
WriteLine("private readonly {0} value;", CSharpLanguage.GetCSharpTypeName(dataSourceWrapperInfo.DataSourceType));
}
/// <summary>
/// Writes a constructor for the specified data source wrapper.
/// </summary>
/// <param name="dataSourceWrapperInfo">A <see cref="DataSourceWrapperInfo"/> describing the data source for which to write a constructor.</param>
public void WriteConstructor(DataSourceWrapperInfo dataSourceWrapperInfo)
{
WriteLine("public {0}({1} dataSource, {2} namescope) : base(namescope)", dataSourceWrapperInfo.DataSourceWrapperName,
CSharpLanguage.GetCSharpTypeName(dataSourceWrapperInfo.DataSourceType),
CSharpLanguage.GetCSharpTypeName(typeof(Namescope)));
WriteLine("{");
WriteLine("this.value = dataSource;");
WriteLine("}");
}
/// <summary>
/// Given a targeted binding expression (in the form "foo->bar"), this method extracts the target name, target type, and expression text.
/// </summary>
private Boolean GetExpressionTargetInfo(IExpressionCompilerState state, DataSourceWrapperInfo dataSourceWrapperInfo,
XObject source, ref String expText, out String expTarget, out Type expTargetType)
{
const string TargetExpressionDelimiter = "->";
var expOriginal = expText;
var delimiterIndex = expText.IndexOf(TargetExpressionDelimiter);
if (delimiterIndex >= 0)
{
var expPartTarget = expText.Substring(0, delimiterIndex);
var expPartText = expText.Substring(delimiterIndex + TargetExpressionDelimiter.Length);
var matchCandidates = (from element in dataSourceWrapperInfo.DataSourceDefinition.Definition.Descendants()
where (String)element.Attribute("Name") == expPartTarget
select element).ToList();
if (matchCandidates.Count == 0)
{
throw new BindingExpressionCompilationErrorException(source, dataSourceWrapperInfo.DataSourceDefinition.DefinitionPath,
CompilerStrings.ExpressionTargetIsNotFound.Format(expPartTarget));
}
if (matchCandidates.Count > 1)
{
throw new BindingExpressionCompilationErrorException(source, dataSourceWrapperInfo.DataSourceDefinition.DefinitionPath,
CompilerStrings.ExpressionTargetIsAmbiguous.Format(expPartTarget));
}
var match = matchCandidates.Single();
var matchName = match.Name.LocalName;
expText = expPartText;
expTargetType = UvmlTypeAnalysis.GetPlaceholderType(dataSourceWrapperInfo.DataSourceType, matchName);
if (expTargetType == null && !state.GetKnownType(matchName, out expTargetType))
{
throw new BindingExpressionCompilationErrorException(source, dataSourceWrapperInfo.DataSourceDefinition.DefinitionPath,
CompilerStrings.ExpressionTargetIsUnrecognizedType.Format(expOriginal, matchName));
}
expTarget = String.Format("__UPF_FindName<{0}>(\"{1}\").", CSharpLanguage.GetCSharpTypeName(expTargetType), expPartTarget);
return(true);
}
expTarget = default(String);
expTargetType = dataSourceWrapperInfo.DataSourceType;
return(false);
}
/// <summary>
/// Writes the source code for the specified data source wrapper.
/// </summary>
private static void WriteSourceCodeForDataSourceWrapper(RoslynExpressionCompilerState state,
DataSourceWrapperInfo dataSourceWrapperInfo)
{
using (var writer = new DataSourceWrapperWriter())
{
// Using statements
var imports = Enumerable.Union(new[] { "System" }, dataSourceWrapperInfo.Imports).Distinct().OrderBy(x => x);
foreach (var import in imports)
{
writer.WriteLine("using {0};", import);
}
writer.WriteLine();
// Namespace declaration
var @namespace = dataSourceWrapperInfo.DataSourceDefinition.DataSourceWrapperNamespace;
writer.WriteLine("namespace " + @namespace);
writer.WriteLine("{");
writer.WriteLine("#pragma warning disable 1591");
writer.WriteLine("#pragma warning disable 0184");
// Data source wrapper class - main
WriteSourceCodeForDataSourceWrapperClass(state, dataSourceWrapperInfo, writer);
// Data source wrapper class - dependent
foreach (var dependentWrapperInfo in dataSourceWrapperInfo.DependentWrapperInfos)
{
WriteSourceCodeForDataSourceWrapperClass(state, dependentWrapperInfo, writer);
}
// Namespace complete
writer.WriteLine("#pragma warning restore 0184");
writer.WriteLine("#pragma warning restore 1591");
writer.WriteLine("}");
dataSourceWrapperInfo.DataSourceWrapperSourceCode = writer.ToString();
}
}
/// <summary>
/// Writes the source code for an individual data source wrapper class.
/// </summary>
private static void WriteSourceCodeForDataSourceWrapperClass(RoslynExpressionCompilerState state,
DataSourceWrapperInfo dataSourceWrapperInfo, DataSourceWrapperWriter writer)
{
// Class declaration
writer.WriteLine("// Generated by the UPF Binding Expression Compiler, version {0}", FileVersionInfo.GetVersionInfo(Assembly.GetExecutingAssembly().Location).FileVersion);
writer.WriteLine("[System.CLSCompliant(false)]");
writer.WriteLine("[Ultraviolet.Presentation.WrappedDataSource(typeof({0}))]", CSharpLanguage.GetCSharpTypeName(dataSourceWrapperInfo.DataSourceType));
writer.WriteLine("public sealed partial class {0} : {1}", dataSourceWrapperInfo.DataSourceWrapperName, CSharpLanguage.GetCSharpTypeName(typeof(CompiledDataSourceWrapper)));
writer.WriteLine("{");
// Constructors
writer.WriteLine("#region Constructors");
writer.WriteConstructor(dataSourceWrapperInfo);
writer.WriteLine("#endregion");
writer.WriteLine();
// IDataSourceWrapper
writer.WriteLine("#region IDataSourceWrapper");
writer.WriteIDataSourceWrapperImplementation(dataSourceWrapperInfo);
writer.WriteLine("#endregion");
writer.WriteLine();
// Methods
writer.WriteLine("#region Methods");
var methods = dataSourceWrapperInfo.DataSourceType.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
foreach (var method in methods)
{
if (!ExpressionUtil.NeedsWrapper(method))
{
continue;
}
writer.WriteWrapperMethod(method);
}
writer.WriteLine("#endregion");
writer.WriteLine();
// Properties
writer.WriteLine("#region Properties");
var properties = dataSourceWrapperInfo.DataSourceType.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
foreach (var property in properties)
{
if (!ExpressionUtil.NeedsWrapper(property))
{
continue;
}
writer.WriteWrapperProperty(property);
}
writer.WriteLine("#endregion");
writer.WriteLine();
// Fields
writer.WriteLine("#region Fields");
var fields = dataSourceWrapperInfo.DataSourceType.GetFields(BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static);
foreach (var field in fields)
{
if (!ExpressionUtil.NeedsWrapper(field))
{
continue;
}
writer.WriteWrapperProperty(field);
}
writer.WriteLine("#endregion");
writer.WriteLine();
// Expressions
writer.WriteLine("#region Expressions");
for (int i = 0; i < dataSourceWrapperInfo.Expressions.Count; i++)
{
var expressionInfo = dataSourceWrapperInfo.Expressions[i];
writer.WriteExpressionProperty(state, dataSourceWrapperInfo, expressionInfo, i);
}
writer.WriteLine("#endregion");
writer.WriteLine();
// Special-case binding delegates
writer.WriteLine("#region Binding Delegates");
if (typeof(Controls.ContentControl).IsAssignableFrom(dataSourceWrapperInfo.DataSourceType))
{
// ContentControl
writer.WriteLine("public static readonly DataBindingGetter<System.Object> __GetContent = " +
"new DataBindingGetter<System.Object>(vm => (({0})vm).Content);", dataSourceWrapperInfo.DataSourceWrapperName);
writer.WriteLine("public static readonly DataBindingGetter<System.String> __GetContentStringFormat = " +
"new DataBindingGetter<System.String>(vm => (({0})vm).ContentStringFormat);", dataSourceWrapperInfo.DataSourceWrapperName);
writer.WriteLine("public static readonly DataBindingSetter<System.Object> __SetContent = " +
"new DataBindingSetter<System.Object>((vm, value) => (({0})vm).Content = value);", dataSourceWrapperInfo.DataSourceWrapperName);
writer.WriteLine("public static readonly DataBindingSetter<System.String> __SetContentStringFormat = " +
"new DataBindingSetter<System.String>((vm, value) => (({0})vm).ContentStringFormat = value);", dataSourceWrapperInfo.DataSourceWrapperName);
}
writer.WriteLine("#endregion");
// Class complete
writer.WriteLine("}");
}
/// <summary>
/// Writes a property which wraps a binding expression.
/// </summary>
/// <param name="state">The expression compiler's current state.</param>
/// <param name="dataSourceWrapperInfo">A <see cref="DataSourceWrapperInfo"/> describing the data source for which to write an expression property.</param>
/// <param name="expressionInfo">The binding expression for which to write a property.</param>
/// <param name="id">The expression's identifier within the view model.</param>
public void WriteExpressionProperty(IExpressionCompilerState state, DataSourceWrapperInfo dataSourceWrapperInfo, BindingExpressionInfo expressionInfo, Int32 id)
{
var isDependencyProperty = false;
var isSimpleDependencyProperty = false;
var expText = BindingExpressions.GetBindingMemberPathPart(expressionInfo.Expression);
var expTarget = default(String);
var expTargetType = dataSourceWrapperInfo.DataSourceType;
var expFormatString = BindingExpressions.GetBindingFormatStringPart(expressionInfo.Expression);
var targeted = GetExpressionTargetInfo(state, dataSourceWrapperInfo,
expressionInfo.Source, ref expText, out expTarget, out expTargetType);
var dprop = DependencyProperty.FindByName(expText, expTargetType);
var dpropField = default(FieldInfo);
if (dprop != null)
{
isDependencyProperty = true;
dpropField =
(from prop in dprop.OwnerType.GetFields(BindingFlags.Public | BindingFlags.Static)
where
prop.FieldType == typeof(DependencyProperty) &&
prop.GetValue(null) == dprop
select prop).SingleOrDefault();
if (dpropField == null)
{
throw new BindingExpressionCompilationErrorException(expressionInfo.Source, dataSourceWrapperInfo.DataSourceDefinition.DefinitionPath,
PresentationStrings.CannotFindDependencyPropertyField.Format(dprop.OwnerType.Name, dprop.Name));
}
if (String.IsNullOrEmpty(expFormatString) && !targeted)
{
isSimpleDependencyProperty = true;
}
}
WriteLine("[{0}(@\"{1}\", SimpleDependencyPropertyOwner = {2}, SimpleDependencyPropertyName = {3})]", typeof(CompiledBindingExpressionAttribute).FullName, expressionInfo.Expression.Replace("\"", "\"\""),
isSimpleDependencyProperty ? "typeof(" + CSharpLanguage.GetCSharpTypeName(dprop.OwnerType) + ")" : "null",
isSimpleDependencyProperty ? "\"" + dprop.Name + "\"" : "null");
WriteLine("public {0} __UPF_Expression{1}", CSharpLanguage.GetCSharpTypeName(expressionInfo.Type), id);
WriteLine("{");
if (expressionInfo.GenerateGetter)
{
expressionInfo.GetterLineStart = LineCount;
var getexp = default(String);
if (isDependencyProperty)
{
getexp = String.Format("{0}GetValue<{1}>({2}.{3})", expTarget,
CSharpLanguage.GetCSharpTypeName(dprop.PropertyType),
CSharpLanguage.GetCSharpTypeName(dprop.OwnerType), dpropField.Name);
}
else
{
getexp = String.Format("{0}{1}", expTarget, expText);
}
var hasFormatString = !String.IsNullOrEmpty(expFormatString);
expFormatString = hasFormatString ? String.Format("\"{{0:{0}}}\"", expFormatString) : "null";
if (IsStringType(expressionInfo.Type) || (expressionInfo.Type == typeof(Object) && hasFormatString))
{
WriteLine("get");
WriteLine("{");
WriteLine("var value = {0};", getexp);
WriteLine("return ({0})__UPF_ConvertToString(value, {1});", CSharpLanguage.GetCSharpTypeName(expressionInfo.Type), expFormatString);
WriteLine("}");
}
else
{
WriteLine("get {{ return ({0})({1}); }}", CSharpLanguage.GetCSharpTypeName(expressionInfo.Type), getexp);
}
expressionInfo.GetterLineEnd = LineCount - 1;
}
if (dprop != null && dprop.IsReadOnly)
{
expressionInfo.GenerateSetter = false;
}
if (expressionInfo.GenerateSetter)
{
var targetTypeName = expressionInfo.CS0266TargetType;
var targetTypeSpecified = !String.IsNullOrEmpty(targetTypeName);
expressionInfo.SetterLineStart = LineCount;
if (isDependencyProperty)
{
if (IsStringType(expressionInfo.Type))
{
WriteLine("set");
WriteLine("{");
WriteLine("var current = {0}GetValue<{1}>({2}.{3});",
expTarget, CSharpLanguage.GetCSharpTypeName(dprop.PropertyType), CSharpLanguage.GetCSharpTypeName(dprop.OwnerType), dpropField.Name);
WriteLine("{0}SetValue<{1}>({2}.{3}, __UPF_ConvertFromString(value, current));",
expTarget, CSharpLanguage.GetCSharpTypeName(dprop.PropertyType), CSharpLanguage.GetCSharpTypeName(dprop.OwnerType), dpropField.Name);
WriteLine("}");
}
else
{
if (expressionInfo.NullableFixup)
{
WriteLine(targetTypeSpecified ? "set {{ {0}SetValue<{1}>({2}.{3}, ({4})(value ?? default({1}))); }}" : "set {{ {0}SetValue<{1}>({2}.{3}, value ?? default({1})); }}",
expTarget,
CSharpLanguage.GetCSharpTypeName(dprop.PropertyType),
CSharpLanguage.GetCSharpTypeName(dprop.OwnerType),
dpropField.Name, targetTypeName);
}
else
{
WriteLine(targetTypeSpecified ? "set {{ {0}SetValue<{1}>({2}.{3}, ({4})(value)); }}" : "set {{ {0}SetValue<{1}>({2}.{3}, value); }}",
expTarget,
CSharpLanguage.GetCSharpTypeName(dprop.PropertyType),
CSharpLanguage.GetCSharpTypeName(dprop.OwnerType),
dpropField.Name, targetTypeName);
}
}
}
else
{
if (IsStringType(expressionInfo.Type))
{
WriteLine("set");
WriteLine("{");
WriteLine("var current = {0}{1};", expTarget, expText);
WriteLine("{0}{1} = __UPF_ConvertFromString(value, current);", expTarget, expText);
WriteLine("}");
}
else
{
if (expressionInfo.NullableFixup)
{
WriteLine(targetTypeSpecified ? "set {{ ({0}{1}) = ({3})(value ?? default({2})); }}" : "set {{ ({0}{1}) = value ?? default({2}); }}",
expTarget, expText, CSharpLanguage.GetCSharpTypeName(Nullable.GetUnderlyingType(expressionInfo.Type)), targetTypeName);
}
else
{
WriteLine(targetTypeSpecified ? "set {{ ({0}{1}) = ({2})(value); }}" : "set {{ ({0}{1}) = value; }}",
expTarget, expText, targetTypeName);
}
}
}
expressionInfo.SetterLineEnd = LineCount - 1;
}
WriteLine("}");
WriteLine();
if (expressionInfo.GenerateGetter)
{
WriteLine("public static readonly DataBindingGetter<{0}> __Get__UPF_Expression{1} = new DataBindingGetter<{0}>(vm => (({2})vm).__UPF_Expression{1});",
CSharpLanguage.GetCSharpTypeName(expressionInfo.Type), id, dataSourceWrapperInfo.DataSourceWrapperName);
WriteLine();
}
if (expressionInfo.GenerateSetter)
{
WriteLine("public static readonly DataBindingSetter<{0}> __Set__UPF_Expression{1} = new DataBindingSetter<{0}>((vm, value) => (({2})vm).__UPF_Expression{1} = value);",
CSharpLanguage.GetCSharpTypeName(expressionInfo.Type), id, dataSourceWrapperInfo.DataSourceWrapperName);
WriteLine();
}
}
/// <summary>
/// Gets the name of the file in which the specified data source wrapper's source code is saved during compilation.
/// </summary>
/// <param name="dataSourceWrapperInfo">The <see cref="DataSourceWrapperInfo"/> for which to retrieve a file name.</param>
/// <returns>The name of the file in which the specified data souurce wrapper's source code is saved during compilation.</returns>
public String GetWorkingFileForDataSourceWrapper(DataSourceWrapperInfo dataSourceWrapperInfo)
{
return(Path.ChangeExtension(Path.Combine(Path.GetTempPath(), dataSourceWrapperInfo.UniqueID.ToString()), "cs"));
}
