/// <summary>
/// Creates a new instance of <see cref="DataSourceWrapperInfo"/> that represents the specified data source wrapper.
/// </summary>
/// <param name="state">The expression compiler's current state.</param>
/// <param name="dataSourceDefinition">The data source definition for which to retrieve data source wrapper info.</param>
/// <returns>The <see cref="DataSourceWrapperInfo"/> that was created to represent the specified data source.</returns>
private static DataSourceWrapperInfo GetDataSourceWrapperInfo(ExpressionCompilerState state, DataSourceDefinition dataSourceDefinition)
{
var dataSourceWrappedType = dataSourceDefinition.TemplatedControl;
if (dataSourceWrappedType == null)
{
var definedDataSourceTypeAttr = dataSourceDefinition.Definition.Attribute("ViewModelType");
var definedDataSourceTypeName = (String)definedDataSourceTypeAttr;
if (definedDataSourceTypeName == null)
return null;
var typeNameCommaIx = definedDataSourceTypeName.IndexOf(',');
if (typeNameCommaIx < 0)
{
throw new BindingExpressionCompilationErrorException(definedDataSourceTypeAttr, dataSourceDefinition.DefinitionPath,
CompilerStrings.ViewModelTypeIsNotFullyQualified.Format(definedDataSourceTypeName));
}
var definedDataSourceType = Type.GetType(definedDataSourceTypeName);
if (definedDataSourceType == null)
{
throw new BindingExpressionCompilationErrorException(definedDataSourceTypeAttr, dataSourceDefinition.DefinitionPath,
PresentationStrings.ViewModelTypeNotFound.Format(definedDataSourceTypeName));
}
dataSourceWrappedType = definedDataSourceType;
}
var dataSourceWrapperName = dataSourceDefinition.DataSourceWrapperName;
var dataSourceWrapperExpressions = new List<BindingExpressionInfo>();
foreach (var element in dataSourceDefinition.Definition.Elements())
{
FindBindingExpressionsInDataSource(state,
dataSourceDefinition, dataSourceWrappedType, element, dataSourceWrapperExpressions);
}
dataSourceWrapperExpressions = CollapseDataSourceExpressions(dataSourceWrapperExpressions);
var dataSourceReferences = new List<String>();
var dataSourceImports = new List<String>();
var xmlRoot = dataSourceDefinition.Definition.Parent;
var xmlDirectives = xmlRoot.Elements("Directive");
foreach (var xmlDirective in xmlDirectives)
{
var xmlDirectiveType = (String)xmlDirective.Attribute("Type");
if (String.IsNullOrEmpty(xmlDirectiveType))
{
throw new BindingExpressionCompilationErrorException(xmlDirective, dataSourceDefinition.DefinitionPath,
CompilerStrings.ViewDirectiveMustHaveType);
}
var xmlDirectiveTypeName = xmlDirectiveType.ToLowerInvariant();
var xmlDirectiveValue = xmlDirective.Value.Trim();
switch (xmlDirectiveTypeName)
{
case "import":
{
if (String.IsNullOrEmpty(xmlDirectiveValue))
{
throw new BindingExpressionCompilationErrorException(xmlDirective, dataSourceDefinition.DefinitionPath,
CompilerStrings.ViewDirectiveHasInvalidValue);
}
dataSourceImports.Add(xmlDirective.Value.Trim());
}
break;
case "reference":
{
if (String.IsNullOrEmpty(xmlDirectiveValue))
{
throw new BindingExpressionCompilationErrorException(xmlDirective, dataSourceDefinition.DefinitionPath,
CompilerStrings.ViewDirectiveHasInvalidValue);
}
dataSourceReferences.Add(xmlDirective.Value.Trim());
}
break;
default:
throw new BindingExpressionCompilationErrorException(xmlDirective, dataSourceDefinition.DefinitionPath,
CompilerStrings.ViewDirectiveNotRecognized.Format(xmlDirectiveTypeName));
}
}
return new DataSourceWrapperInfo()
{
References = dataSourceReferences,
Imports = dataSourceImports,
DataSourceDefinition = dataSourceDefinition,
DataSourceType = dataSourceWrappedType,
DataSourceWrapperName = dataSourceWrapperName,
Expressions = dataSourceWrapperExpressions,
};
}
/// <summary>
/// Searches the specified XML element tree for binding expressions and adds them to the specified collection.
/// </summary>
/// <param name="state">The expression compiler's current state.</param>
/// <param name="dataSourceDefinition">The data source definition for the data source which is being compiled.</param>
/// <param name="dataSourceWrappedType">The type for which a data source wrapper is being compiled.</param>
/// <param name="element">The root of the XML element tree to search.</param>
/// <param name="expressions">The list to populate with any binding expressions that are found.</param>
private static void FindBindingExpressionsInDataSource(ExpressionCompilerState state, DataSourceDefinition dataSourceDefinition,
Type dataSourceWrappedType, XElement element, List<BindingExpressionInfo> expressions)
{
var elementName = element.Name.LocalName;
var elementType = GetPlaceholderType(dataSourceWrappedType, elementName);
if (elementType != null || state.GetKnownType(elementName, out elementType))
{
var attrs = element.Attributes();
foreach (var attr in attrs)
{
var attrValue = attr.Value;
if (!BindingExpressions.IsBindingExpression(attrValue))
continue;
var dprop = FindDependencyOrAttachedPropertyByName(state, attr.Name.LocalName, elementType);
if (dprop == null)
{
throw new BindingExpressionCompilationErrorException(attr, dataSourceDefinition.DefinitionPath,
CompilerStrings.OnlyDependencyPropertiesCanBeBound.Format(attr.Name.LocalName));
}
expressions.Add(new BindingExpressionInfo(attr, attrValue, dprop.PropertyType) { GenerateGetter = true });
}
if (element.Nodes().Count() == 1)
{
var singleChild = element.Nodes().Single();
if (singleChild.NodeType == XmlNodeType.Text)
{
var elementValue = ((XText)singleChild).Value;
if (BindingExpressions.IsBindingExpression(elementValue))
{
String defaultProperty;
if (!state.GetElementDefaultProperty(elementType, out defaultProperty))
{
throw new BindingExpressionCompilationErrorException(singleChild, dataSourceDefinition.DefinitionPath,
CompilerStrings.ElementDoesNotHaveDefaultProperty.Format(elementType.Name));
}
var dprop = FindDependencyOrAttachedPropertyByName(state, defaultProperty, elementType);
if (dprop == null)
{
throw new BindingExpressionCompilationErrorException(singleChild, dataSourceDefinition.DefinitionPath,
CompilerStrings.OnlyDependencyPropertiesCanBeBound.Format(defaultProperty));
}
expressions.Add(new BindingExpressionInfo(singleChild, elementValue, dprop.PropertyType) { GenerateGetter = true });
}
}
}
}
var children = element.Elements();
foreach (var child in children)
{
FindBindingExpressionsInDataSource(state, dataSourceDefinition,
dataSourceWrappedType, child, expressions);
}
}
/// <summary>
/// Creates a new <see cref="DataSourceWrapperInfo"/> instance which represents a particular framework template.
/// </summary>
private static DataSourceWrapperInfo GetDataSourceWrapperInfoForFrameworkTemplate(ExpressionCompilerState state,
IEnumerable<String> references, IEnumerable<String> imports, DataSourceDefinition definition)
{
var dataSourceWrappedTypeAttr = definition.Definition.Attribute("ViewModelType");
if (dataSourceWrappedTypeAttr == null)
{
throw new BindingExpressionCompilationErrorException(definition.Definition, definition.DefinitionPath,
PresentationStrings.TemplateMustSpecifyViewModelType);
}
var dataSourceWrappedType = Type.GetType(dataSourceWrappedTypeAttr.Value, false);
if (dataSourceWrappedType == null)
{
throw new BindingExpressionCompilationErrorException(dataSourceWrappedTypeAttr, definition.DefinitionPath,
PresentationStrings.ViewModelTypeNotFound.Format(dataSourceWrappedTypeAttr.Value));
}
var dataSourceDefinition = definition;
var dataSourceWrapperName = definition.DataSourceWrapperName;
var expressions = new List<BindingExpressionInfo>();
foreach (var element in dataSourceDefinition.Definition.Elements())
{
FindBindingExpressionsInDataSource(state,
dataSourceDefinition, dataSourceWrappedType, element, expressions);
}
expressions = CollapseDataSourceExpressions(expressions);
return new DataSourceWrapperInfo()
{
References = references,
Imports = imports,
DataSourceDefinition = dataSourceDefinition,
DataSourceType = dataSourceWrappedType,
DataSourceWrapperName = dataSourceWrapperName,
Expressions = expressions
};
}
