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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Xml;
using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;
using Mono.Cecil;
using Xamarin.Forms.Xaml;
namespace Xamarin.Forms.Build.Tasks
{
public abstract class XamlTask : AppDomainIsolatedTask
{
[Required]
public string Assembly { get; set; }
public string DependencyPaths { get; set; }
public string ReferencePath { get; set; }
public int Verbosity { get; set; }
public bool DebugSymbols { get; set; }
internal XamlTask()
{
}
protected Logger Logger { get; set; }
public override bool Execute()
{
Logger = new Logger(Log, Verbosity);
return Execute(null);
}
public abstract bool Execute(IList<Exception> thrownExceptions);
protected static MethodDefinition DuplicateMethodDef(TypeDefinition typeDef, MethodDefinition methodDef, string newName)
{
var dup = new MethodDefinition(newName, methodDef.Attributes, methodDef.ReturnType);
dup.Body = methodDef.Body;
typeDef.Methods.Add(dup);
return dup;
}
internal static ILRootNode ParseXaml(Stream stream, TypeReference typeReference)
{
ILRootNode rootnode = null;
using (var reader = XmlReader.Create(stream)) {
while (reader.Read()) {
//Skip until element
if (reader.NodeType == XmlNodeType.Whitespace)
continue;
if (reader.NodeType != XmlNodeType.Element) {
Debug.WriteLine("Unhandled node {0} {1} {2}", reader.NodeType, reader.Name, reader.Value);
continue;
}
XamlParser.ParseXaml(
rootnode = new ILRootNode(new XmlType(reader.NamespaceURI, reader.Name, null), typeReference, reader as IXmlNamespaceResolver), reader);
break;
}
}
return rootnode;
}
}
static class CecilExtensions
{
public static bool IsXaml(this EmbeddedResource resource, out string classname)
{
classname = null;
if (!resource.Name.EndsWith(".xaml", StringComparison.InvariantCulture))
return false;
using (var resourceStream = resource.GetResourceStream()) {
var xmlDoc = new XmlDocument();
xmlDoc.Load(resourceStream);
var nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
var root = xmlDoc.SelectSingleNode("/*", nsmgr);
if (root == null)
return false;
var rootClass = root.Attributes ["Class", "http://schemas.microsoft.com/winfx/2006/xaml"] ??
root.Attributes ["Class", "http://schemas.microsoft.com/winfx/2009/xaml"];
if (rootClass == null)
return false;
classname = rootClass.Value;
return true;
}
}
}
}
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