using ICSharpCode.TextEditor.Document;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JackWangCUMT.WinForm
{
 
 /// <summary>
 /// The class to generate the foldings, it implements ICSharpCode.TextEditor.Document.IFoldingStrategy
 /// </summary>
 public class MingFolding : IFoldingStrategy
 {
 /// <summary>
 /// Generates the foldings for our document.
 /// </summary>
 /// <param name="document">The current document.</param>
 /// <param name="fileName">The filename of the document.</param>
 /// <param name="parseInformation">Extra parse information, not used in this sample.</param>
 /// <returns>A list of FoldMarkers.</returns>
 public List<FoldMarker> GenerateFoldMarkers(IDocument document, string fileName, object parseInformation)
 {
 List<FoldMarker> list = new List<FoldMarker>();
 //stack 先進先出
 var startLines = new Stack<int>();
 // Create foldmarkers for the whole document, enumerate through every line.
 for (int i = 0; i < document.TotalNumberOfLines; i++)
 {
 // Get the text of current line.
 string text = document.GetText(document.GetLineSegment(i));

 if (text.Trim().StartsWith("#region")) // Look for method starts
 {
 startLines.Push(i);

 }
 if (text.Trim().StartsWith("#endregion")) // Look for method endings
 {
 int start = startLines.Pop();
 // Add a new FoldMarker to the list.
 // document = the current document
 // start = the start line for the FoldMarker
 // document.GetLineSegment(start).Length = the ending of the current line = the start column of our foldmarker.
 // i = The current line = end line of the FoldMarker.
 // 7 = The end column
 list.Add(new FoldMarker(document, start, document.GetLineSegment(start).Length, i, 57, FoldType.Region, "..."));
 }
 //支持嵌套 {}
 if (text.Trim().StartsWith("{")) // Look for method starts
 {
 startLines.Push(i);
 }
 if (text.Trim().StartsWith("}")) // Look for method endings
 {
 if (startLines.Count > 0)
 {
 int start = startLines.Pop();
 list.Add(new FoldMarker(document, start, document.GetLineSegment(start).Length, i, 57, FoldType.TypeBody, "...}"));
 }
 }


 // /// <summary>
 if (text.Trim().StartsWith("http:/// <summary>")) // Look for method starts
 {
 startLines.Push(i);
 }
 if (text.Trim().StartsWith("http:/// <returns>")) // Look for method endings
 {

 int start = startLines.Pop();
 //獲取注釋文本（包括空格）
 string display = document.GetText(document.GetLineSegment(start + 1).Offset, document.GetLineSegment(start + 1).Length);
 //remove ///
 display = display.Trim().TrimStart('/');
 list.Add(new FoldMarker(document, start, document.GetLineSegment(start).Length, i, 57, FoldType.TypeBody, display));
 }
 }

 return list;
 }
 }
}

textEditor.Encoding = System.Text.Encoding.UTF8;
 textEditor.Font = new Font("Hack",12);
 textEditor.Document.FoldingManager.FoldingStrategy = new JackWangCUMT.WinForm.MingFolding();
 textEditor.Text = sampleCode;

 //自定義代碼高亮
 string path = Application.StartupPath+ "\\HighLighting";
 FileSyntaxModeProvider fsmp;
 if (Directory.Exists(path))
 {
 fsmp = new FileSyntaxModeProvider(path);
 HighlightingManager.Manager.AddSyntaxModeFileProvider(fsmp);
 textEditor.SetHighlighting("JackC#");
 

 }

 private void TextEditor_TextChanged(object sender, EventArgs e)
 {
 //更新，以便進行代碼折疊
 textEditor.Document.FoldingManager.UpdateFoldings(null, null);
 }