/// <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);
}
/// <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)
{
// FIXME: Support any kind of types, not just Xamarin.Forms views
if (!fileName.EndsWith(".xaml") && !fileName.EndsWith(".xaml.cs"))
{
return(null);
}
if (!GetOrCreate(fileName, text, syntaxTree, semanticModel,
out FormsViewClassDeclaration xamlClass,
out XAMLDocument xamlDocument))
{
Log.Error("Could not handle document update");
return(null);
}
// The document is a XAML file
if (fileName.EndsWith(".xaml"))
{
if (xamlDocument == null)
{
xamlDocument = XAMLDocument.Parse(fileName, text);
}
await xamlClass.UpdateXaml(xamlDocument);
}
// The document is code behind
else if (fileName.EndsWith(".xaml.cs"))
{
var classDeclaration = FormsViewClassDeclaration.FindClass(syntaxTree, xamlClass.ClassName);
if (xamlClass.NeedsClassInitialization)
{
xamlClass.FillClassInfo(classDeclaration, semanticModel);
}
xamlClass.UpdateCode(classDeclaration);
}
return(xamlClass);
}
static bool GetOrCreate(string fileName,
string text,
SyntaxTree syntaxTree,
SemanticModel semanticModel,
out FormsViewClassDeclaration xamlClass,
out XAMLDocument xamlDocument)
{
string xaml = null, xamlFilePath = null, codeBehindFilePath = null;
xamlDocument = null;
// Check if we have already an instance of the class declaration for that file
if (FormsViewClassDeclaration.TryGetByFileName(fileName, out xamlClass))
{
return(true);
}
if (fileName.EndsWith(".xaml"))
{
xaml = text;
xamlFilePath = fileName;
var candidate = xamlFilePath + ".cs";
if (File.Exists(candidate))
{
codeBehindFilePath = candidate;
}
}
else
{
codeBehindFilePath = fileName;
var candidate = fileName.Substring(0, fileName.Length - 3);
if (File.Exists(candidate))
{
xamlFilePath = candidate;
xaml = File.ReadAllText(xamlFilePath);
}
}
// FIXME: Handle XF views without XAML
// Parse the XAML file
xamlDocument = XAMLDocument.Parse(xamlFilePath, xaml);
if (xamlDocument == null)
{
Log.Error("Error parsing XAML");
return(false);
}
// Check if we have an instance of class by namespace
if (FormsViewClassDeclaration.TryGetByFullNamespace(xamlDocument.Type, out xamlClass))
{
return(true);
}
// This is the first time we have an update for this type
// Create a new class declaration instance from the syntax tree
if (syntaxTree != null)
{
var className = xamlDocument.Type.Split('.').Last();
var classDeclaration = FormsViewClassDeclaration.FindClass(syntaxTree, className);
xamlClass = new FormsViewClassDeclaration(classDeclaration, semanticModel,
codeBehindFilePath, xamlDocument);
}
// Create a new class declaration instance from the XAML
else
{
xamlClass = new FormsViewClassDeclaration(codeBehindFilePath, xamlDocument);
}
return(true);
}
