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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Microsoft.Boogie.ModelViewer
{
public interface ILanguageProvider
{
bool IsMyModel(Model m);
IEnumerable<IState> GetStates(Model m);
}
[Flags]
public enum NodeState
{
Normal = 0,
Changed = 1
}
public interface IEdgeName
{
int CompareTo(IEdgeName other);
string FullName();
string ShortName();
IEnumerable<Model.Element> Dependencies { get; }
int Score { get; }
}
public interface IDisplayNode
{
/// <summary>
/// Used for indexing the state tree.
/// </summary>
IEdgeName Name { get; }
/// <summary>
/// Used to determine aliasing. Can be null.
/// </summary>
Model.Element Element { get; }
bool Expandable { get; }
IEnumerable<IDisplayNode> Expand();
// Things displayed to the user.
NodeState State { get; }
IEnumerable<string> Values { get; }
string ToolTip { get; }
object ViewSync { get; set; }
}
public interface IState
{
string Name { get; }
IEnumerable<IDisplayNode> Nodes { get; }
}
public class TopState : IState
{
protected IDisplayNode[] children;
protected string name;
public TopState(string name, IEnumerable<IDisplayNode> nodes)
{
this.name = name;
children = nodes.ToArray();
}
public string Name
{
get { return name; }
}
public IEnumerable<IDisplayNode> Nodes
{
get { return children; }
}
}
public abstract class DisplayNode : IDisplayNode
{
protected IEdgeName name;
public DisplayNode(string n)
{
name = new EdgeName(n);
}
public DisplayNode(IEdgeName n)
{
name = n;
}
public virtual IEnumerable<string> Values
{
get { yield break; }
}
public virtual string ToolTip
{
get { return null; }
}
public virtual bool Expandable
{
get { return false; }
}
public virtual IEnumerable<IDisplayNode> Expand()
{
yield break;
}
public virtual NodeState State { get { return NodeState.Normal; } }
public object ViewSync { get; set; }
public virtual IEdgeName Name
{
get { return name; }
}
public virtual Model.Element Element
{
get { return null; }
}
}
public class ContainerNode<T> : DisplayNode
{
protected Func<T, IDisplayNode> convert;
protected IEnumerable<T> data;
public ContainerNode(IEdgeName name, Func<T, IDisplayNode> convert, IEnumerable<T> data) : base(name)
{
this.convert = convert;
this.data = data;
}
public ContainerNode(string name, Func<T, IDisplayNode> convert, IEnumerable<T> data)
: this(new EdgeName(name), convert, data)
{
}
public override bool Expandable { get { return true; } }
public override IEnumerable<IDisplayNode> Expand()
{
foreach (var f in data) {
var res = convert(f);
if (res != null)
yield return res;
}
}
}
public static class Util
{
public static void Assert(bool cond)
{
if (!cond) throw new System.Exception("assertion violation");
}
public static IEnumerable<T> Empty<T>() { yield break; }
public static IEnumerable<T> Singleton<T>(T e) { yield return e; }
public static IEnumerable<T> Concat1<T>(this IEnumerable<T> s, T e) { return s.Concat(Singleton(e)); }
public static IEnumerable<T> Map<S, T>(this IEnumerable<S> inp, Func<S, T> conv)
{
foreach (var s in inp) yield return conv(s);
}
public static void Iter<T>(this IEnumerable<T> inp, Action<T> fn)
{
foreach (var s in inp) fn(s);
}
public static T OrElse<T>(T a, T b)
where T : class
{
if (a != null) return a;
return b;
}
}
}
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