[转]ScintillaNET的应用

　　出于工作需要，需要制作一个嵌入在桌面应用中的C语言编辑器，经过一系列调研，目前ScintillaNET应该是最合适的了，开源、轻便、功能丰富，但是踩得坑也很多，接下面一一说道。

　　目前ScintillaNET托管在https://github.com/jacobslusser/ScintillaNET，拉下来重新编译。由于需要移植到.NET 2.0的平台上，需要修改源码中的对Linq的依赖，这里不多说，把目标框架改为.NET 2.0，编译，哪里报错改哪里。

1. 编辑器风格

参考：https://github.com/robinrodricks/ScintillaNET.Demo

2. 括号的匹配和高亮

为了方便多处调用该控件，继承Scintilla类，实现“自定义”控件，以下均以这种做法来实现功能。

重写OnUpdateUI事件，在UpdateUI中实现括号匹配功能。

private int m_lastCaretPos =0; 2 protected override void OnUpdateUI(UpdateUIEventArgs e) 3 { 4     base.OnUpdateUI(e); 5     MatchAndLightBracket(); 6 } 7 private void MatchAndLightBracket() 8  { 9     // Has the caret changed position?10     int caretPos = this.CurrentPosition;11     if (m_lastCaretPos != caretPos)12     {13         m_lastCaretPos = caretPos;14         int bracePos1 = -1;15         int bracePos2 = -1;16 17         // Is there a brace to the left or right?18         if (caretPos > 0 && IsBrace(this.GetCharAt(caretPos - 1)))19              bracePos1 = (caretPos - 1);20         else if (IsBrace(this.GetCharAt(caretPos)))21              bracePos1 = caretPos;22 23         if (bracePos1 >= 0)24         {25              // Find the matching brace26              bracePos2 = this.BraceMatch(bracePos1);27              if (bracePos2 == CodeEditor.InvalidPosition)28              {29                   ReleaseHighlightB();30              }31               else32               {33                    ReleaseHighlightB();34                    HighlightBracket(bracePos1);35                    HighlightBracket(bracePos2);36               }37          }38          else39          {40                 ReleaseHighlightB();41          }42     }43 }44 private void HighlightBracket(int pos)45 {46     if (pos < 0)47         return;48     this.IndicatorFillRange(pos, 1);49 }50 private void ReleaseHighlightB()51 {52     this.IndicatorClearRange(0, this.TextLength);53 }54 private static bool IsBrace(int c)55 {56     switch (c)57     {58         case '(':59         case ')':60         case '[':61         case ']':62         case '{':63         case '}':64         case '<':65         case '>':66             return true;67     }68 69     return false;70 }

3. Ctrl+Z会一次性清空所有的修改

protected override void OnBeforeInsert(BeforeModificationEventArgs e) 2 { 3     base.OnBeforeInsert(e); 4     Count = this.Text.Length; 5     this.BeginUndoAction(); 6 } 7 protected override void OnInsert(ModificationEventArgs e) 8 { 9     base.OnInsert(e);10     if (Count < this.Text.Length)11         this.EndUndoAction(); 12 }

4.缩进调整

protected override void OnCharAdded(CharAddedEventArgs e) 2 { 3     base.OnCharAdded(e); 4     AutoIndicator(); 5 } 6 private void AutoIndicator() 7 { 8     int pos = this.CurrentPosition; 9     if (pos > 3 && this.GetCharAt(pos - 1) == '
' && this.GetCharAt(pos - 2) == '
')10     {11         if (this.GetCharAt(pos - 3) == '{')12         {13             string[] Text = GetStringList();14             string line = Text[this.CurrentLine - 1];15             int start = line.IndexOf(line.TrimStart());16             string ss = line.Substring(0, start);17             string str = new string(' ',4);18             this.InsertText(pos, ss+str);19             this.SelectionStart = this.SelectionEnd = pos + ss.Length + 4;20         }21         else22         {23             string[] Text = GetStringList();24             string line = Text[this.CurrentLine - 1];25             int start = line.IndexOf(line.TrimStart());26             string ss = line.Substring(0, start);27             this.InsertText(pos, ss);28             this.SelectionStart = this.SelectionEnd = pos + ss.Length;29         }30 31     }32 }33 private string[] GetStringList()34 {35     string[] s = new string[] { "
" };36     return this.Text.Split(s, StringSplitOptions.None);37 }

目前整理了这么多，有机会再继续深入理解和应用ScintillaNET。

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作者：EditCode
来源：CNBLOGS
原文：https://www.cnblogs.com/hawk007/p/10383528.html
版权声明：本文为作者原创文章，转载请附上博文链接！