/
SetResourcesVisitor.cs
93 lines (80 loc) · 3.04 KB
/
SetResourcesVisitor.cs
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using System;
using System.Collections;
using System.Linq;
using Mono.Cecil;
using Mono.Cecil.Cil;
using Xamarin.Forms.Xaml;
namespace Xamarin.Forms.Build.Tasks
{
class SetResourcesVisitor : IXamlNodeVisitor
{
public SetResourcesVisitor(ILContext context)
{
Context = context;
Module = context.Body.Method.Module;
}
public ILContext Context { get; }
ModuleDefinition Module { get; }
public TreeVisitingMode VisitingMode => TreeVisitingMode.TopDown;
public bool StopOnDataTemplate => true;
public bool StopOnResourceDictionary => false;
public bool VisitNodeOnDataTemplate => false;
public void Visit(ValueNode node, INode parentNode)
{
if (!IsResourceDictionary((IElementNode)parentNode))
return;
node.Accept(new SetPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
}
public void Visit(MarkupNode node, INode parentNode)
{
}
public void Visit(ElementNode node, INode parentNode)
{
XmlName propertyName;
//Set ResourcesDictionaries to their parents
if (IsResourceDictionary(node) && SetPropertiesVisitor.TryGetPropertyName(node, parentNode, out propertyName)) {
if ((propertyName.LocalName == "Resources" || propertyName.LocalName.EndsWith(".Resources", StringComparison.Ordinal))) {
Context.IL.Append(SetPropertiesVisitor.SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node));
return;
}
}
//Only proceed further if the node is a keyless RD
if ( parentNode is IElementNode
&& IsResourceDictionary((IElementNode)parentNode)
&& !((IElementNode)parentNode).Properties.ContainsKey(XmlName.xKey))
node.Accept(new SetPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
else if ( parentNode is ListNode
&& IsResourceDictionary((IElementNode)parentNode.Parent)
&& !((IElementNode)parentNode.Parent).Properties.ContainsKey(XmlName.xKey))
node.Accept(new SetPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
}
public void Visit(RootNode node, INode parentNode)
{
}
public void Visit(ListNode node, INode parentNode)
{
}
public bool IsResourceDictionary(ElementNode node) => IsResourceDictionary((IElementNode)node);
bool IsResourceDictionary(IElementNode node)
{
var parentVar = Context.Variables[(IElementNode)node];
return parentVar.VariableType.FullName == "Xamarin.Forms.ResourceDictionary"
|| parentVar.VariableType.ResolveCached().BaseType?.FullName == "Xamarin.Forms.ResourceDictionary";
}
public bool SkipChildren(INode node, INode parentNode)
{
var enode = node as ElementNode;
if (enode == null)
return false;
if ( parentNode is IElementNode
&& IsResourceDictionary((IElementNode)parentNode)
&& !((IElementNode)parentNode).Properties.ContainsKey(XmlName.xKey))
return true;
if ( parentNode is ListNode
&& IsResourceDictionary((IElementNode)parentNode.Parent)
&& !((IElementNode)parentNode.Parent).Properties.ContainsKey(XmlName.xKey))
return true;
return false;
}
}
}