AvalonEdit中的BraceFolding

Question

我使用DanielGrünwald的BraceFoldingStrategy:

public IEnumerable<NewFolding> CreateNewFoldings(ITextSource document)
        {
            List<NewFolding> newFoldings = new List<NewFolding>();

            Stack<int> startOffsets = new Stack<int>();
            int lastNewLineOffset = 0;
            char openingBrace = this.OpeningBrace;
            char closingBrace = this.ClosingBrace;
            for (int i = 0; i < document.TextLength; i++) {
                char c = document.GetCharAt(i);
                if (c == openingBrace) {
                    startOffsets.Push(i);
                } else if (c == closingBrace && startOffsets.Count > 0) {
                    int startOffset = startOffsets.Pop();
                    // don't fold if opening and closing brace are on the same line
                    if (startOffset < lastNewLineOffset) {
                        newFoldings.Add(new NewFolding(startOffset, i + 1));
                    }
                } else if (c == '\n' || c == '\r') {
                    lastNewLineOffset = i + 1;
                }
            }
            newFoldings.Sort((a,b) => a.StartOffset.CompareTo(b.StartOffset));
            return newFoldings;
        }

这按预期工作,但仍有一个问题

最后一个大括号上总是有一个最后一个图标.我试图删除它,但是当我查看列表newFoldings时,我可以看到那里只有3个折叠.那么第四个来自哪里？

编辑

根据DanielGrünwald的说法,问题在于我必须使用不同的折叠管理器.但是我在初始化代码中找不到任何声明,我在其中设置了第二个FoldingManager.也许有任何提示？

private void textEditor_Loaded(object sender, RoutedEventArgs e)
{
   LoadSourceCode();
   textEditor.Background = Brushes.Green;  
   textEditor.IsReadOnly = true;    
   textEditor.ShowLineNumbers = true;

   using (Stream s = this.GetType().Assembly.GetManifestResourceStream("Prototype_Concept_2.View.Layouts.CustomHighlighting.xshd"))
   {
      using (XmlTextReader reader = new XmlTextReader(s))
      {    
         textEditor.SyntaxHighlighting = HighlightingLoader.Load(reader, HighlightingManager.Instance);
      }
    }

   (textEditor.TextArea as IScrollInfo).ScrollOwner.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden;
   (textEditor.TextArea as IScrollInfo).ScrollOwner.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;

   FoldingManager foldingManager = FoldingManager.Install(textEditor.TextArea);    
   BraceFoldingStrategy foldingStrategy = new BraceFoldingStrategy();    
   foldingStrategy.UpdateFoldings(foldingManager, textEditor.Document);

   TextArea txt = textEditor.TextArea;    
   ObservableCollection<UIElement> margins = txt.LeftMargins;

   foreach (UIElement margin in margins)    
   {    
      if ((margin as FoldingMargin) != null)
      {
         Contacts.AddPreviewContactDownHandler(margin as FoldingMargin, OnDown);
      }
   }

   Main.Children.Remove(textEditor);
   ScrollHost.Width = textEditor.Width;    
   ScrollHost.Height = textEditor.Height;    
   ScrollHost.Content = textEditor;
   textEditor.Background = Brushes.Transparent;
   ScrollHost.Background = Brushes.Transparent;    
}

编辑2

我检查了当前安装的FoldingManager有3个折叠,但我仍然不知道第四个折叠的定义.

Answer 1

简单的BraceFoldingStrategy在我的经验中太麻烦,真的没用.有多个问题,比如破坏缩进(每次在AvalonDock中更改标签时我都会获得额外的折叠边距 - 它可能是您面临的同样问题),字符串中的大括号被解析为普通大括号(它甚至可以配对一个字符串{有真实})等,所以我决定放弃它.

真正的代码折叠支持需要真正的词法(或更好的语法)分析信息,如果可以的话可以使用(您可以在SharpDevelop 4.0源代码中找到用法示例),但您必须能够访问编写编辑器的语言的解析器因为那个.

我认为代码折叠不是IDE最重要的功能,我个人很少使用它(只有非常大的文件与区域/大方法).

我知道这不是你所希望的答案(如果帖子没有超过长度限制,我会将其作为评论发布).我会继续关注这一点(并希望有人提供一个真正的答案).