private void DeleteProduction_Click(object sender, RoutedEventArgs e)
{
if (ToDeleteProduction != null)
{
Productions.Remove(ToDeleteProduction);
}
ToDeleteProduction = null;
}
private void DeleteProductionViewer_Click(object sender, ItemClickEventArgs e)
{
ToDeleteProduction = (ProductionViewer)e.ClickedItem;
}
async private void OnLoadGrammarCallBack(List <string> nonterminals, List <string> terminals, List <string> productions, string start)
{
Nonterminals.Clear();
Terminals.Clear();
StartNonterminal = null;
foreach (var item in nonterminals)
{
Nonterminals.Add(new TokenViewer
{
Token = item,
IsStart = false,
Type = TokenType.Nonterminal
});
}
foreach (var item in terminals)
{
Terminals.Add(new TokenViewer
{
Token = item,
IsStart = false,
Type = TokenType.Terminal
});
}
Terminals.Add(new TokenViewer
{
Token = "ε",
IsStart = false,
Type = TokenType.Epsilon
});
foreach (var item in Nonterminals)
{
if (item.Token.Equals(start))
{
StartNonterminal = item;
StartNonterminal.IsStart = true;
}
}
ProductionsLoadByLocal = new ObservableCollection <ProductionViewer>();
foreach (var item in productions)
{
string[] nonterminalAndCandidate = item.Split('#');
if (nonterminalAndCandidate.Length != 2)
{
ProductionsLoadByLocal = null;
break;
}
else
{
try
{
ProductionViewer newProduction = new ProductionViewer
{
Nonterminal = Nonterminals.First(elem => elem.Token.Equals(nonterminalAndCandidate[0])),
Candidates = new List <TokenViewer>()
};
string[] candidates = nonterminalAndCandidate[1].Split('.');
foreach (var elem in candidates)
{
if (!string.IsNullOrWhiteSpace(elem))
{
newProduction.Candidates.Add(Nonterminals.Concat(Terminals).First(e => e.Token.Equals(elem)));
}
}
ProductionsLoadByLocal.Add(newProduction);
}
catch (Exception)
{
ProductionsLoadByLocal = null;
break;
}
}
}
if (Nonterminals.Count == 0 ||
Terminals.Count == 0 ||
StartNonterminal == null ||
ProductionsLoadByLocal == null)
{
Nonterminals.Clear();
Terminals.Clear();
StartNonterminal = null;
MessageDialog error = new MessageDialog("文件读取失败")
{
Title = "错误"
};
error.Commands.Add(new UICommand("确定"));
await error.ShowAsync();
}
else
{
this.Frame.Navigate(typeof(ProductionPage), Nonterminals.Concat(Terminals));
}
}