/// <summary>
/// Parses document updates from the IDE and return the class associated
/// with the changes.
/// </summary>
/// <returns>The class declaration that changed.</returns>
/// <param name="fileName">File name changed.</param>
/// <param name="text">Text changed.</param>
/// <param name="syntaxTree">Syntax tree.</param>
/// <param name="semanticModel">Semantic model.</param>
public static async Task <FormsViewClassDeclaration> ParseDocument(string fileName,
string text,
SyntaxTree syntaxTree,
SemanticModel semanticModel)
{
XAMLDocument xamlDocument = null;
FormsViewClassDeclaration formsViewClass = null;
// FIXME: Support any kind of types, not just Xamarin.Forms views
if (!fileName.EndsWith(".xaml") && !fileName.EndsWith(".xaml.cs") && !fileName.EndsWith(".cs"))
{
return(null);
}
// Check if we have already an instance of the class declaration for that file
if (!FormsViewClassDeclaration.TryGetByFileName(fileName, out formsViewClass))
{
if (fileName.EndsWith(".xaml"))
{
xamlDocument = XAMLDocument.Parse(fileName, text);
// Check if we have an instance of class by namespace
if (!FormsViewClassDeclaration.TryGetByFullNamespace(xamlDocument.Type, out formsViewClass))
{
formsViewClass = await CreateFromXaml(xamlDocument);
}
}
else
{
formsViewClass = await CreateFromCodeBehind(fileName, syntaxTree, semanticModel);
}
}
if (formsViewClass == null)
{
return(null);
}
// The document is a XAML file
if (fileName.EndsWith(".xaml") && xamlDocument == null)
{
xamlDocument = XAMLDocument.Parse(fileName, text);
await formsViewClass.UpdateXaml(xamlDocument);
}
// The document is code behind or a view without XAML
if (fileName.EndsWith(".cs"))
{
var classDeclaration = FormsViewClassDeclaration.FindClass(syntaxTree, formsViewClass.ClassName);
if (formsViewClass.NeedsClassInitialization)
{
formsViewClass.FillClassInfo(classDeclaration, semanticModel);
}
formsViewClass.UpdateCode(classDeclaration, semanticModel);
}
return(formsViewClass);
}
static async Task <FormsViewClassDeclaration> CreateFromCodeBehind(string fileName,
SyntaxTree syntaxTree, SemanticModel semanticModel)
{
string xaml = null;
string xamlFilePath = null;
string codeBehindFilePath = null;
string className = null;
ClassDeclarationSyntax classDeclaration;
XAMLDocument xamlDocument = null;
codeBehindFilePath = fileName;
var xamlCandidate = fileName.Substring(0, fileName.Length - 3);
if (File.Exists(xamlCandidate))
{
xamlFilePath = xamlCandidate;
xaml = File.ReadAllText(xamlFilePath);
}
// FIXME: Handle XF views without XAML
if (xamlFilePath != null)
{
// Parse the XAML file
xamlDocument = XAMLDocument.Parse(xamlFilePath, xaml);
className = xamlDocument.Type.Split('.').Last();
classDeclaration = FormsViewClassDeclaration.FindClass(syntaxTree, className);
}
else
{
try
{
classDeclaration = FormsViewClassDeclaration.FindFormsViewClass(syntaxTree, semanticModel);
}
catch (Exception ex)
{
Log.Exception(ex);
Log.Error("The class is not a Xamarin.Forms View or Page");
return(null);
}
}
var formsClass = new FormsViewClassDeclaration(classDeclaration, semanticModel,
codeBehindFilePath, xamlDocument);
if (xamlDocument != null)
{
await formsClass.UpdateXaml(xamlDocument);
}
return(formsClass);
}
static async Task <FormsViewClassDeclaration> CreateFromXaml(XAMLDocument xamlDocument)
{
string codeBehindFilePath = xamlDocument.FilePath + ".cs";
if (!File.Exists(codeBehindFilePath))
{
Log.Error("XAML file without code behind");
return(null);
}
var xamlClass = new FormsViewClassDeclaration(codeBehindFilePath, xamlDocument);
await xamlClass.UpdateXaml(xamlDocument);
return(xamlClass);
}
