entity.cs

Freetextbox是优秀的在线编辑器

        public char ReadChar()
        {
            char ch1 = (char) ((ushort) this.stm.Read());
            if (ch1 == '\0')
            {
                ch1 = ' ';
            }
            this.absolutePos++;
            if (ch1 == '\n')
            {
                this.IsWhitespace = true;
                this.lineStart = this.absolutePos + 1;
                this.Line++;
            }
            else if ((ch1 == ' ') || (ch1 == '\t'))
            {
                this.IsWhitespace = true;
                if (this.Lastchar == '\r')
                {
                    this.lineStart = this.absolutePos;
                    this.Line++;
                }
            }
            else if (ch1 == '\r')
            {
                this.IsWhitespace = true;
            }
            else
            {
                this.IsWhitespace = false;
                if (this.Lastchar == '\r')
                {
                    this.Line++;
                    this.lineStart = this.absolutePos;
                }
            }
            this.Lastchar = ch1;
            return ch1;
        }

        public string ScanLiteral(StringBuilder sb, char quote)
        {
            sb.Length = 0;
            for (char ch1 = this.ReadChar(); (ch1 != 0xffff) && (ch1 != quote); ch1 = this.ReadChar())
            {
                if (ch1 == '&')
                {
                    ch1 = this.ReadChar();
                    if (ch1 == '#')
                    {
                        string text1 = this.ExpandCharEntity();
                        sb.Append(text1);
                    }
                    else
                    {
                        sb.Append('&');
                        sb.Append(ch1);
                    }
                }
                else
                {
                    sb.Append(ch1);
                }
            }
            this.ReadChar();
            return sb.ToString();
        }

        public string ScanToEnd(StringBuilder sb, string type, string terminators)
        {
            if (sb != null)
            {
                sb.Length = 0;
            }
            int num1 = this.Line;
            char ch1 = this.ReadChar();
            int num2 = 0;
            char ch2 = terminators[num2];
            while (ch1 != 0xffff)
            {
                if (ch1 == ch2)
                {
                    num2++;
                    if (num2 >= terminators.Length)
                    {
                        break;
                    }
                    ch2 = terminators[num2];
                }
                else if (num2 > 0)
                {
                    int num3 = num2 - 1;
                    int num4 = 0;
                    while ((num3 >= 0) && (num4 == 0))
                    {
                        if (terminators[num3] == ch1)
                        {
                            int num5 = 1;
                            while ((num3 - num5) >= 0)
                            {
                                if (terminators[num3 - num5] != terminators[num2 - num5])
                                {
                                    break;
                                }
                                num5++;
                            }
                            if (num5 > num3)
                            {
                                num4 = num3 + 1;
                            }
                        }
                        else
                        {
                            num3--;
                        }
                    }
                    if (sb != null)
                    {
                        num3 = (num3 < 0) ? 1 : 0;
                        for (int num6 = 0; num6 <= ((num2 - num4) - num3); num6++)
                        {
                            sb.Append(terminators[num6]);
                        }
                        if (num3 > 0)
                        {
                            sb.Append(ch1);
                        }
                    }
                    num2 = num4;
                    ch2 = terminators[num4];
                }
                else if (sb != null)
                {
                    sb.Append(ch1);
                }
                ch1 = this.ReadChar();
            }
            if (ch1 == '\0')
            {
                this.Error(type + " starting on line {0} was never closed", num1);
            }
            this.ReadChar();
            if (sb != null)
            {
                return sb.ToString();
            }
            return "";
        }

        public string ScanToken(StringBuilder sb, string term, bool nmtoken)
        {
            sb.Length = 0;
            char ch1 = this.Lastchar;
            if (!((!nmtoken || (ch1 == '_')) || char.IsLetter(ch1)))
            {
                throw new Exception(string.Format("Invalid name start character '{0}'", ch1));
            }
            while ((ch1 != 0xffff) && (term.IndexOf(ch1) < 0))
            {
                if ((((nmtoken && (ch1 != '_')) && ((ch1 != '.') && (ch1 != '-'))) && (ch1 != ':')) && !char.IsLetterOrDigit(ch1))
                {
                    throw new Exception(string.Format("Invalid name character '{0}'", ch1));
                }
                sb.Append(ch1);
                ch1 = this.ReadChar();
            }
            return sb.ToString();
        }

        public void SetLiteralType(string token)
        {
            switch (token)
            {
                case "CDATA":
                    this.LiteralType = FreeTextBoxControls.Support.Sgml.LiteralType.CDATA;
                    break;

                case "SDATA":
                    this.LiteralType = FreeTextBoxControls.Support.Sgml.LiteralType.SDATA;
                    break;

                case "PI":
                    this.LiteralType = FreeTextBoxControls.Support.Sgml.LiteralType.PI;
                    break;
            }
        }

        public char SkipWhitespace()
        {
            char ch1 = this.Lastchar;
            while ((ch1 != 0xffff) && ((((ch1 == ' ') || (ch1 == '\r')) || (ch1 == '\n')) || (ch1 == '\t')))
            {
                ch1 = this.ReadChar();
            }
            return ch1;
        }


        public int LinePosition
        {
            get
            {
                return ((this.absolutePos - this.lineStart) + 1);
            }
        }

        public System.Uri ResolvedUri
        {
            get
            {
                if (this.resolvedUri != null)
                {
                    return this.resolvedUri;
                }
                if (this.Parent != null)
                {
                    return this.Parent.ResolvedUri;
                }
                return null;
            }
        }


        private int absolutePos;
        private static int[] CtrlMap;
        private Encoding encoding;
        public const char EOF = '\uffff';
        public bool Html;
        public bool Internal;
        public bool IsWhitespace;
        public char Lastchar;
        public int Line;
        private int lineStart;
        public string Literal;
        public FreeTextBoxControls.Support.Sgml.LiteralType LiteralType;
        public string Name;
        public Entity Parent;
        public string Proxy;
        public string PublicId;
        private System.Uri resolvedUri;
        private TextReader stm;
        public string Uri;
        private bool weOwnTheStream;
    }
}