C#
using System;using System.Collections.Generic;using System.Drawing;using System.Runtime.InteropServices;using System.Text.RegularExpressions;namespace SyntaxEngineClass
{
/// <summary>
/// 语法分析引擎基类 /// ZswangY37 wjhu111#21cn.com 2007-03-17 尊重作者，转贴请注明出处 /// 日期:2007-03-17 /// 设计:ZswangY37 /// 支持:wjhu111#21cn.com /// 感谢CSDN中的kissknife、chinnel提供改进意见 /// http://community.csdn.net/Expert/TopicView.asp?id=5400165
/// </summary> class SyntaxEngine { /// <summary> /// 语法项 /// </summary> public class SyntaxItem { private string FPattern; // 正则表达式 private RegexOptions FOptions; // 正则表达式附加选项 private string FName; // 语法名称 private int FIndex; // 序号 public string Pattern { get { return FPattern; } } // 正则表达式 public RegexOptions Options { get { return FOptions; } } // 正则表达式附加选项 public string Name { get { return FName; } } // 名称 public int Index { get { return FIndex; } } // 序号 public SyntaxItem(string APattern, RegexOptions AOptions, string AName, int AIndex) { FPattern = APattern; FOptions = AOptions; FName = AName; FIndex = AIndex; } } /// <summary> /// 语法分析返回项 /// </summary> public class AnalyzeReslut { private SyntaxItem FItem; // 所属语法项 private string FBlock; // 文字块 public SyntaxItem Item { get { return FItem; } } public string Block { get { return FBlock; } } public AnalyzeReslut(SyntaxItem AItem, string ABlock) { FItem = AItem; FBlock = ABlock; } } private List<SyntaxItem> FSyntaxItems = new List<SyntaxItem>(); private List<AnalyzeReslut> FAnalyzeResluts = new List<AnalyzeReslut>(); public List<SyntaxItem> SyntaxItems { get { return FSyntaxItems; } } public List<AnalyzeReslut> AnalyzeResluts { get { return FAnalyzeResluts; } } /// <summary> /// 进行语法分析 /// </summary> /// <param name="ACode">所分析的代码</param> /// <returns>返回分析是否成功</returns> public virtual bool Analyze(string ACode) { if (FSyntaxItems.Count <= 0) return false; if (ACode == null) return false; AnalyzeResluts.Clear(); string vCode = ACode; bool vFind = true; while (vFind && (vCode.Length > 0)) { vFind = false; foreach (SyntaxItem vSyntaxItem in FSyntaxItems) { if (Regex.IsMatch(vCode, vSyntaxItem.Pattern, vSyntaxItem.Options)) { AnalyzeResluts.Add(new AnalyzeReslut(vSyntaxItem, Regex.Match(vCode, vSyntaxItem.Pattern, vSyntaxItem.Options).Value)); vCode = Regex.Replace(vCode, vSyntaxItem.Pattern, "", vSyntaxItem.Options); vFind = true; break; } } } return true; } } /// <summary> /// C#语法分析引擎 /// ZswangY37 wjhu111#21cn.com 2007-03-17 尊重作者，转贴请注明出处 /// </summary> class CSharpEngine : SyntaxEngine { public CSharpEngine() { SyntaxItems.Add(new SyntaxItem(@"^\s+", RegexOptions.None, "空白", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^\/\/[^\n]*[\n]?", RegexOptions.None, "单行注释", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^\/\*.*?\*\/", RegexOptions.None, "多行注释", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^#\s*(define|elif|else|endif|endregion|" + @"error|if|line|pragma|region|undef|using|warning)\b[^\n]*[\n]?", RegexOptions.None, "指令", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^(abstract|event|new|struct|as|explicit|" + @"null|switch|base|extern|object|this|bool|false|operator|throw|break|" + @"finally|out|true|byte|fixed|override|try|case|float|params|typeof|" + @"catch|for|private|uint|char|foreach|protected|ulong|checked|goto|" + @"public|unchecked|class|if|readonly|unsafe|const|implicit|ref|ushort|" + @"continue|in|return|using|decimal|int|sbyte|virtual|default|interface|" + @"sealed|volatile|delegate|internal|short|void|do|is|sizeof|while|" + @"double|lock|stackalloc|else|long|static|enum|namespace|string)\b", RegexOptions.None, "关键字", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^(get|partial|set|value|where|yield)\b", RegexOptions.None, "上下文关键字", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^(\+\=|\-\=|\&\&|\|\||\/\=|\&\=|\%\=|\~|\!|\+\+|\-\-|" + @"\#|\$|\%|\^|\&|\*|\(|\)|\+|\-|\=|\{|\}|\[|\]|\\|\;|\:|\<|\>|\?|\,|\.|\/)+", RegexOptions.None, "标点符号", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^(\d+(?!\.|x|e|d|m)u?)|^0x([\da-f]+(?!\.|x|m)u?)", RegexOptions.IgnoreCase, "整数", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^(\d+)?\.\d+((\+|\-)?e\d+)?(m|d|f)?|^\d+((\+|\-)?e\d+)?(m|d|f)", RegexOptions.IgnoreCase, "浮点数", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^@""(("""")*([^""])*)*""|^""((\\\\)*(\\"")*(\\[a-z])*[^""^\\]*)*""", RegexOptions.None, "字符串", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^\'(\\\')*[^\']*\'", RegexOptions.None, "字符", SyntaxItems.Count)); SyntaxItems.Add(new SyntaxItem(@"^\w*", RegexOptions.None, "标识符", SyntaxItems.Count)); } } /// <summary> /// 语法高亮引擎 /// ZswangY37 wjhu111#21cn.com 2007-03-17 尊重作者，转贴请注明出处 /// </summary> class SyntaxHighlight { public class HighlightItem { private Color FForeColor; // 前景色 private bool FBold; // 是否加粗 private bool FItalic; // 是否斜体 private bool FUnderline; // 是否下划线 public Color ForeColor { get { return FForeColor; } } // 前景色 public bool Bold { get { return FBold; } } // 是否加粗 public bool Italic { get { return FItalic; } } // 是否斜体 public bool Underline { get { return FUnderline; } } // 是否下划线 public HighlightItem(Color AForeColor, bool ABold, bool AItalic, bool AUnderline) { FForeColor = AForeColor; FBold = ABold; FItalic = AItalic; FUnderline = AUnderline; } } private List<SyntaxEngine.AnalyzeReslut> FAnalyzeResluts; private Font FDefaultFont; private List<HighlightItem> FHighlightItems = new List<HighlightItem>(); public List<HighlightItem> HighlightItems { get { return FHighlightItems; } } public SyntaxHighlight(SyntaxEngine ASyntaxEngine, Font ADefaultFont) { FAnalyzeResluts = ASyntaxEngine.AnalyzeResluts; FDefaultFont = ADefaultFont; } /// <summary> /// 将文本中的RTF元素处理掉 /// </summary> /// <param name="AText">输入的文本</param> /// <returns>返回处理后的RTF文本</returns> public string TextToRtf(string AText) { string Result = ""; foreach (char vChar in AText) { switch (vChar) { case '\\': Result += @"\\"; break; case '{': Result += @"\{"; break; case '}': Result += @"\}"; break; default: if (vChar > (char) 127) Result += @"\u" + ((int) vChar).ToString() + "?"; else Result += vChar; break; } } return Result; } [DllImport("user32.dll")] private static extern uint GetKBCodePage(); [DllImport("kernel32.dll")] private static extern ushort GetSystemDefaultLangID(); /// <summary> /// 将代码处理成RTF格式 /// </summary> /// <returns>返回处理后的RTF文本</returns> public string MakeRtf() { if (HighlightItems.Count <= 0) return ""; string Result = @"{\rtf1\ansi\ansicpg" + GetKBCodePage().ToString() + @"\deff0\deflang1033\deflangfe" + GetSystemDefaultLangID().ToString() + @"{\fonttbl{\f0\fmodern " + FDefaultFont.Name + ";}}\r\n"; Result += @"{\colortbl ;"; foreach (HighlightItem vHighlightItem in HighlightItems) Result += string.Format(@"\red{0}\green{1}\blue{2};", vHighlightItem.ForeColor.R, vHighlightItem.ForeColor.G, vHighlightItem.ForeColor.B); Result += "}\r\n"; Result += @"\viewkind4\uc1\pard\f0\fs20" + "\r\n"; bool vBold = false, vItalic = false, vUnderline = false; foreach (SyntaxEngine.AnalyzeReslut vAnalyzeReslut in FAnalyzeResluts) { int i = vAnalyzeReslut.Item.Index; if (i >= HighlightItems.Count) i = 0; if (vBold != HighlightItems[i].Bold) { if (HighlightItems[i].Bold) Result += @"\b1"; else Result += @"\b0"; } if (vItalic != HighlightItems[i].Italic) { if (HighlightItems[i].Italic) Result += @"\i1"; else Result += @"\i0"; } if (vItalic != HighlightItems[i].Underline) { if (HighlightItems[i].Underline) Result += @"\ul1"; else Result += @"\ul0"; } Result += string.Format(@"\cf{0} ", i + 1); vBold = HighlightItems[i].Bold; vItalic = HighlightItems[i].Italic; vUnderline = HighlightItems[i].Underline; Result += TextToRtf(vAnalyzeReslut.Block).Replace("\r\n", "\r\n" + @"\par"); } return Result + "}"; } /// <summary> /// 将文本中的HTML元素处理掉 /// </summary> /// <param name="AText">输入的文本</param> /// <returns>返回处理后的HTML文本</returns> private string TextToHtml(string AText) { string Result = ""; foreach (char vChar in AText) { switch (vChar) { case '&': Result += @"&"; break; case ' ': Result += @" "; break; case '<': Result += @"<"; break; case '>': Result += @">"; break; case '"': Result += @"""; break; //case '\n': // Result += @"<br>"; // break; default: if (vChar > (char) 127) Result += @"&#" + ((int) vChar).ToString() + ";"; else Result += vChar; break; } } return Result; } /// <summary> /// 将颜色处理为HTML表达的方式 /// </summary> /// <param name="AColor">输入的颜色</param> /// <returns>返回HTML颜色表达式</returns> private string ColorToHtml(Color AColor) { return string.Format("#{0:X2}{1:X2}{2:X2}", AColor.R, AColor.G, AColor.B); } /// <summary> /// 将代码处理为HTML文本 /// </summary> /// <returns>返回处理后的HTML文本</returns> public string MakeHtml() { string Result = @"<code><pre style=""font-size:" + FDefaultFont.Size + @"pt;font-family:" + FDefaultFont.Name + @""">"; foreach (SyntaxEngine.AnalyzeReslut vAnalyzeReslut in FAnalyzeResluts) { int i = vAnalyzeReslut.Item.Index; if (i >= HighlightItems.Count) i = 0; string vLeft = string.Format(@"<span style=""color={0}"">", ColorToHtml(HighlightItems[i].ForeColor)); string vRight = "</span>"; if (HighlightItems[i].Bold) { vLeft += "<b>"; vRight = "</b>" + vRight; } if (HighlightItems[i].Italic) { vLeft += "<i>"; vRight = "</i>" + vRight; } if (HighlightItems[i].Underline) { vLeft += "<u>"; vRight = "</u>" + vRight; } Result += vLeft + TextToHtml(vAnalyzeReslut.Block) + vRight; } return Result + "</pre></code>"; } } /// <summary> /// C#语法高亮引擎 /// </summary> class CSharpHighlight : SyntaxHighlight { public CSharpHighlight(SyntaxEngine ASyntaxEngine, Font ADefaultFont) : base(ASyntaxEngine, ADefaultFont) { //空白 HighlightItems.Add(new HighlightItem(Color.White, false, false, false)); //单行注释 HighlightItems.Add(new HighlightItem(Color.Green, false, false, false)); //多行注释 HighlightItems.Add(new HighlightItem(Color.Green, false, false, false)); //指令 HighlightItems.Add(new HighlightItem(Color.Blue, false, false, false)); //关键字 HighlightItems.Add(new HighlightItem(Color.Black, true, false, false)); //上下文关键字 HighlightItems.Add(new HighlightItem(Color.Black, true, false, false)); //标点符号 HighlightItems.Add(new HighlightItem(Color.BlueViolet, false, false, false)); //整数 HighlightItems.Add(new HighlightItem(Color.Red, true, false, false)); //浮点数 HighlightItems.Add(new HighlightItem(Color.Red, true, false, false)); //字符串 HighlightItems.Add(new HighlightItem(Color.Maroon, false, false, false)); //字符 HighlightItems.Add(new HighlightItem(Color.Maroon, false, false, false)); //标识符 HighlightItems.Add(new HighlightItem(Color.Black, false, false, false)); } }
}