/
XamlNodeVisitor.cs
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/
XamlNodeVisitor.cs
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using System;
namespace Xamarin.Forms.Xaml
{
interface IXamlNodeVisitor
{
TreeVisitingMode VisitingMode { get; }
bool StopOnDataTemplate { get; }
bool VisitNodeOnDataTemplate { get; }
bool StopOnResourceDictionary { get; }
void Visit(ValueNode node, INode parentNode);
void Visit(MarkupNode node, INode parentNode);
void Visit(ElementNode node, INode parentNode);
void Visit(RootNode node, INode parentNode);
void Visit(ListNode node, INode parentNode);
bool SkipChildren(INode node, INode parentNode);
bool IsResourceDictionary(ElementNode node);
}
enum TreeVisitingMode {
TopDown,
BottomUp
}
class XamlNodeVisitor : IXamlNodeVisitor
{
readonly Action<INode, INode> action;
public XamlNodeVisitor(Action<INode, INode> action, TreeVisitingMode visitingMode = TreeVisitingMode.TopDown, bool stopOnDataTemplate = false, bool visitNodeOnDataTemplate = true)
{
this.action = action;
VisitingMode = visitingMode;
StopOnDataTemplate = stopOnDataTemplate;
VisitNodeOnDataTemplate = visitNodeOnDataTemplate;
}
public TreeVisitingMode VisitingMode { get; }
public bool StopOnDataTemplate { get; }
public bool StopOnResourceDictionary { get; }
public bool VisitNodeOnDataTemplate { get; }
public void Visit(ValueNode node, INode parentNode) => action(node, parentNode);
public void Visit(MarkupNode node, INode parentNode) => action(node, parentNode);
public void Visit(ElementNode node, INode parentNode) => action(node, parentNode);
public void Visit(RootNode node, INode parentNode) => action(node, parentNode);
public void Visit(ListNode node, INode parentNode) => action(node, parentNode);
public bool SkipChildren(INode node, INode parentNode) => false;
public bool IsResourceDictionary(ElementNode node) => false;
}
}