XmlUtilWriter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Configuration / System / Configuration / XmlUtilWriter.cs / 1 / XmlUtilWriter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Configuration { 
    using System.Configuration.Internal; 
    using System.Collections;
    using System.Collections.Specialized; 
    using System.Collections.Generic;
    using System.Configuration;
    using System.Globalization;
    using System.IO; 
    using System.Runtime.InteropServices;
    using System.Security; 
    using System.Security.Permissions; 
    using System.Text;
    using System.Xml; 
    using System.Net;

    //
    // A utility class for writing XML to a TextWriter. 
    //
    // When this class is used to copy an XML document that may include a " 0xFFFD)) {
                    appendCharEntity = true; 
                }
                else { 
                    switch (ch) 
                    {
                        case '<': 
                            entityRef = "lt";
                            break;

                        case '>': 
                            entityRef = "gt";
                            break; 
 
                        case '&':
                            entityRef = "amp"; 
                            break;

                        case '\'':
                            if (inAttribute && quoteChar == ch) { 
                                entityRef = "apos";
                            } 
                            break; 

                        case '"': 
                            if (inAttribute && quoteChar == ch) {
                                entityRef = "quot";
                            }
                            break; 

                        case '\n': 
                        case '\r': 
                            appendCharEntity = inAttribute;
                            break; 

                        default:
                            break;
                    } 
                }
 
                if (appendCharEntity) { 
                    charactersWritten += AppendCharEntity(ch);
                } 
                else if (entityRef != null) {
                    charactersWritten += AppendEntityRef(entityRef);
                }
                else { 
                    charactersWritten += Write(ch);
                } 
            } 

            return charactersWritten; 
        }

        internal int AppendEntityRef(string entityRef) {
            Write('&'); 
            Write(entityRef);
            Write(';'); 
            return entityRef.Length + 2; 
        }
 
        internal int AppendCharEntity(char ch) {
            string numberToWrite = ((int)ch).ToString("X", CultureInfo.InvariantCulture);
            Write('&');
            Write('#'); 
            Write('x');
            Write(numberToWrite); 
            Write(';'); 
            return numberToWrite.Length + 4;
        } 

        internal int AppendCData(string cdata) {
            Write("");
            return cdata.Length + 12; 
        } 

        internal int AppendProcessingInstruction(string name, string value) { 
            Write("");
            return name.Length + value.Length + 5; 
        } 

        internal int AppendComment(string comment) { 
            Write("");
            return comment.Length + 7; 
        }
 
        internal int AppendAttributeValue(XmlTextReader reader) { 
            int charactersWritten = 0;
            char quote = reader.QuoteChar; 

            //
            // In !DOCTYPE, quote is '\0' for second public attribute.
            // Protect ourselves from writing invalid XML by always 
            // supplying a valid quote char.
            // 
            if (quote != '"' && quote != '\'') { 
                quote = '"';
            } 

            charactersWritten += Write(quote);
            while (reader.ReadAttributeValue()) {
                if (reader.NodeType == XmlNodeType.Text) { 
                    charactersWritten += AppendEscapeXmlString(reader.Value, true, quote);
                } 
                else { 
                    charactersWritten += AppendEntityRef(reader.Name);
                } 
            }

            charactersWritten += Write(quote);
            return charactersWritten; 
        }
 
        // Append whitespace, ensuring there is at least one space. 
        internal int AppendRequiredWhiteSpace(int fromLineNumber, int fromLinePosition, int toLineNumber, int toLinePosition) {
            int charactersWritten = AppendWhiteSpace(fromLineNumber, fromLinePosition, toLineNumber, toLinePosition); 
            if (charactersWritten == 0) {
                charactersWritten += AppendSpace();
            }
 
            return charactersWritten;
        } 
 

        // Append whitespce 
        internal int AppendWhiteSpace(int fromLineNumber, int fromLinePosition, int toLineNumber, int toLinePosition) {
            int charactersWritten = 0;
            while (fromLineNumber++ < toLineNumber) {
                charactersWritten += AppendNewLine(); 
                fromLinePosition = 1;
            } 
 
            charactersWritten += AppendSpaces(toLinePosition - fromLinePosition);
            return charactersWritten; 
        }

        //
        // Append indent 
        //      linePosition - starting line position
        //      indent - number of spaces to indent each unit of depth 
        //      depth - depth to indent 
        //      newLine - insert new line before indent?
        // 
        internal int AppendIndent(int linePosition, int indent, int depth, bool newLine) {
            int charactersWritten = 0;
            if (newLine) {
                charactersWritten += AppendNewLine(); 
            }
 
            int c = (linePosition - 1) + (indent * depth); 
            charactersWritten += AppendSpaces(c);
            return charactersWritten; 
        }

        //
        // AppendSpacesToLinePosition 
        //
        // Write spaces up to the line position, taking into account the 
        // current line position of the writer. 
        //
        internal int AppendSpacesToLinePosition(int linePosition) { 
            Debug.Assert(_trackPosition, "_trackPosition");

            if (linePosition <= 0) {
                return 0; 
            }
 
            int delta = linePosition - _linePosition; 
            if (delta < 0 && IsLastLineBlank) {
                SeekToLineStart(); 
            }

            return AppendSpaces(linePosition - _linePosition);
        } 

        // 
        // Append a new line 
        //
        internal int AppendNewLine() { 
            return Write(NL);
        }

        // 
        // AppendSpaces
        // 
        // Write spaces to the writer provided.  Since we do not want waste 
        // memory by allocating do not use "new String(' ', count)".
        // 
        internal int AppendSpaces(int count) {
            int c = count;
            while (c > 0) {
                if (c >= 8) { 
                    Write(SPACES_8);
                    c -= 8; 
                } 
                else if (c >= 4) {
                    Write(SPACES_4); 
                    c -= 4;
                }
                else if (c >= 2) {
                    Write(SPACES_2); 
                    c -= 2;
                } 
                else { 
                    Write(SPACE);
                    break; 
                }
            }

            return (count > 0) ? count : 0; 
        }
 
        // 
        // Append a single space character
        // 
        internal int AppendSpace() {
            return Write(SPACE);
        }
 
        //
        // Reset the stream to the beginning of the current blank line. 
        // 
        internal void SeekToLineStart() {
            Debug.Assert(_isLastLineBlank, "_isLastLineBlank"); 
            RestoreStreamCheckpoint(_lineStartCheckpoint);
        }

        // Create a checkpoint that can be restored with RestoreStreamCheckpoint(). 
        internal object CreateStreamCheckpoint() {
            return new StreamWriterCheckpoint(this); 
        } 

        // Restore the writer state that was recorded with CreateStreamCheckpoint(). 
        internal void RestoreStreamCheckpoint(object o) {
            StreamWriterCheckpoint checkpoint = (StreamWriterCheckpoint) o;

            Flush(); 

            _lineNumber = checkpoint._lineNumber; 
            _linePosition = checkpoint._linePosition; 
            _isLastLineBlank = checkpoint._isLastLineBlank;
 
            _baseStream.Seek(checkpoint._streamPosition, SeekOrigin.Begin);
            _baseStream.SetLength(checkpoint._streamLength);
            _baseStream.Flush();
        } 

        // Class that contains the state of the writer and its underlying stream. 
        private class StreamWriterCheckpoint { 
            internal int         _lineNumber;       // line number
            internal int         _linePosition;     // line position 
            internal bool        _isLastLineBlank;  // is the last line blank?
            internal long        _streamLength;     // length of the stream
            internal long        _streamPosition;   // position of the stream pointer
 
            internal StreamWriterCheckpoint(XmlUtilWriter writer) {
                writer.Flush(); 
                _lineNumber = writer._lineNumber; 
                _linePosition = writer._linePosition;
                _isLastLineBlank = writer._isLastLineBlank; 

                writer._baseStream.Flush();
                _streamPosition = writer._baseStream.Position;
                _streamLength = writer._baseStream.Length; 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Configuration { 
    using System.Configuration.Internal; 
    using System.Collections;
    using System.Collections.Specialized; 
    using System.Collections.Generic;
    using System.Configuration;
    using System.Globalization;
    using System.IO; 
    using System.Runtime.InteropServices;
    using System.Security; 
    using System.Security.Permissions; 
    using System.Text;
    using System.Xml; 
    using System.Net;

    //
    // A utility class for writing XML to a TextWriter. 
    //
    // When this class is used to copy an XML document that may include a " 0xFFFD)) {
                    appendCharEntity = true; 
                }
                else { 
                    switch (ch) 
                    {
                        case '<': 
                            entityRef = "lt";
                            break;

                        case '>': 
                            entityRef = "gt";
                            break; 
 
                        case '&':
                            entityRef = "amp"; 
                            break;

                        case '\'':
                            if (inAttribute && quoteChar == ch) { 
                                entityRef = "apos";
                            } 
                            break; 

                        case '"': 
                            if (inAttribute && quoteChar == ch) {
                                entityRef = "quot";
                            }
                            break; 

                        case '\n': 
                        case '\r': 
                            appendCharEntity = inAttribute;
                            break; 

                        default:
                            break;
                    } 
                }
 
                if (appendCharEntity) { 
                    charactersWritten += AppendCharEntity(ch);
                } 
                else if (entityRef != null) {
                    charactersWritten += AppendEntityRef(entityRef);
                }
                else { 
                    charactersWritten += Write(ch);
                } 
            } 

            return charactersWritten; 
        }

        internal int AppendEntityRef(string entityRef) {
            Write('&'); 
            Write(entityRef);
            Write(';'); 
            return entityRef.Length + 2; 
        }
 
        internal int AppendCharEntity(char ch) {
            string numberToWrite = ((int)ch).ToString("X", CultureInfo.InvariantCulture);
            Write('&');
            Write('#'); 
            Write('x');
            Write(numberToWrite); 
            Write(';'); 
            return numberToWrite.Length + 4;
        } 

        internal int AppendCData(string cdata) {
            Write("");
            return cdata.Length + 12; 
        } 

        internal int AppendProcessingInstruction(string name, string value) { 
            Write("");
            return name.Length + value.Length + 5; 
        } 

        internal int AppendComment(string comment) { 
            Write("");
            return comment.Length + 7; 
        }
 
        internal int AppendAttributeValue(XmlTextReader reader) { 
            int charactersWritten = 0;
            char quote = reader.QuoteChar; 

            //
            // In !DOCTYPE, quote is '\0' for second public attribute.
            // Protect ourselves from writing invalid XML by always 
            // supplying a valid quote char.
            // 
            if (quote != '"' && quote != '\'') { 
                quote = '"';
            } 

            charactersWritten += Write(quote);
            while (reader.ReadAttributeValue()) {
                if (reader.NodeType == XmlNodeType.Text) { 
                    charactersWritten += AppendEscapeXmlString(reader.Value, true, quote);
                } 
                else { 
                    charactersWritten += AppendEntityRef(reader.Name);
                } 
            }

            charactersWritten += Write(quote);
            return charactersWritten; 
        }
 
        // Append whitespace, ensuring there is at least one space. 
        internal int AppendRequiredWhiteSpace(int fromLineNumber, int fromLinePosition, int toLineNumber, int toLinePosition) {
            int charactersWritten = AppendWhiteSpace(fromLineNumber, fromLinePosition, toLineNumber, toLinePosition); 
            if (charactersWritten == 0) {
                charactersWritten += AppendSpace();
            }
 
            return charactersWritten;
        } 
 

        // Append whitespce 
        internal int AppendWhiteSpace(int fromLineNumber, int fromLinePosition, int toLineNumber, int toLinePosition) {
            int charactersWritten = 0;
            while (fromLineNumber++ < toLineNumber) {
                charactersWritten += AppendNewLine(); 
                fromLinePosition = 1;
            } 
 
            charactersWritten += AppendSpaces(toLinePosition - fromLinePosition);
            return charactersWritten; 
        }

        //
        // Append indent 
        //      linePosition - starting line position
        //      indent - number of spaces to indent each unit of depth 
        //      depth - depth to indent 
        //      newLine - insert new line before indent?
        // 
        internal int AppendIndent(int linePosition, int indent, int depth, bool newLine) {
            int charactersWritten = 0;
            if (newLine) {
                charactersWritten += AppendNewLine(); 
            }
 
            int c = (linePosition - 1) + (indent * depth); 
            charactersWritten += AppendSpaces(c);
            return charactersWritten; 
        }

        //
        // AppendSpacesToLinePosition 
        //
        // Write spaces up to the line position, taking into account the 
        // current line position of the writer. 
        //
        internal int AppendSpacesToLinePosition(int linePosition) { 
            Debug.Assert(_trackPosition, "_trackPosition");

            if (linePosition <= 0) {
                return 0; 
            }
 
            int delta = linePosition - _linePosition; 
            if (delta < 0 && IsLastLineBlank) {
                SeekToLineStart(); 
            }

            return AppendSpaces(linePosition - _linePosition);
        } 

        // 
        // Append a new line 
        //
        internal int AppendNewLine() { 
            return Write(NL);
        }

        // 
        // AppendSpaces
        // 
        // Write spaces to the writer provided.  Since we do not want waste 
        // memory by allocating do not use "new String(' ', count)".
        // 
        internal int AppendSpaces(int count) {
            int c = count;
            while (c > 0) {
                if (c >= 8) { 
                    Write(SPACES_8);
                    c -= 8; 
                } 
                else if (c >= 4) {
                    Write(SPACES_4); 
                    c -= 4;
                }
                else if (c >= 2) {
                    Write(SPACES_2); 
                    c -= 2;
                } 
                else { 
                    Write(SPACE);
                    break; 
                }
            }

            return (count > 0) ? count : 0; 
        }
 
        // 
        // Append a single space character
        // 
        internal int AppendSpace() {
            return Write(SPACE);
        }
 
        //
        // Reset the stream to the beginning of the current blank line. 
        // 
        internal void SeekToLineStart() {
            Debug.Assert(_isLastLineBlank, "_isLastLineBlank"); 
            RestoreStreamCheckpoint(_lineStartCheckpoint);
        }

        // Create a checkpoint that can be restored with RestoreStreamCheckpoint(). 
        internal object CreateStreamCheckpoint() {
            return new StreamWriterCheckpoint(this); 
        } 

        // Restore the writer state that was recorded with CreateStreamCheckpoint(). 
        internal void RestoreStreamCheckpoint(object o) {
            StreamWriterCheckpoint checkpoint = (StreamWriterCheckpoint) o;

            Flush(); 

            _lineNumber = checkpoint._lineNumber; 
            _linePosition = checkpoint._linePosition; 
            _isLastLineBlank = checkpoint._isLastLineBlank;
 
            _baseStream.Seek(checkpoint._streamPosition, SeekOrigin.Begin);
            _baseStream.SetLength(checkpoint._streamLength);
            _baseStream.Flush();
        } 

        // Class that contains the state of the writer and its underlying stream. 
        private class StreamWriterCheckpoint { 
            internal int         _lineNumber;       // line number
            internal int         _linePosition;     // line position 
            internal bool        _isLastLineBlank;  // is the last line blank?
            internal long        _streamLength;     // length of the stream
            internal long        _streamPosition;   // position of the stream pointer
 
            internal StreamWriterCheckpoint(XmlUtilWriter writer) {
                writer.Flush(); 
                _lineNumber = writer._lineNumber; 
                _linePosition = writer._linePosition;
                _isLastLineBlank = writer._isLastLineBlank; 

                writer._baseStream.Flush();
                _streamPosition = writer._baseStream.Position;
                _streamLength = writer._baseStream.Length; 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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