Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / Core / QueryOutputWriterV1.cs / 1305376 / QueryOutputWriterV1.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System; using System.IO; using System.Diagnostics; using System.Collections.Generic; namespace System.Xml { ////// This writer wraps an XmlWriter that was not build using the XmlRawWriter architecture (such as XmlTextWriter or a custom XmlWriter) /// for use in the XslCompilerTransform. Depending on the Xsl stylesheet output settings (which gets transfered to this writer via the /// internal properties of XmlWriterSettings) this writer will inserts additional lexical information into the resulting Xml 1.0 document: /// /// 1. CData sections /// 2. DocType declaration /// 3. Standalone attribute /// /// It also calls WriteStateDocument if standalone="yes" and/or a DocType declaration is written out in order to enforce document conformance /// checking. /// internal class QueryOutputWriterV1 : XmlWriter { private XmlWriter wrapped; private bool inCDataSection; private DictionarylookupCDataElems; private BitStack bitsCData; private XmlQualifiedName qnameCData; private bool outputDocType, inAttr; private string systemId, publicId; private XmlStandalone standalone; public QueryOutputWriterV1(XmlWriter writer, XmlWriterSettings settings) { this.wrapped = writer; this.systemId = settings.DocTypeSystem; this.publicId = settings.DocTypePublic; if (settings.OutputMethod == XmlOutputMethod.Xml) { bool documentConformance = false; // Xml output method shouldn't output doc-type-decl if system ID is not defined (even if public ID is) // Only check for well-formed document if output method is xml if (this.systemId != null) { documentConformance = true; this.outputDocType = true; } // Check for well-formed document if standalone="yes" in an auto-generated xml declaration if (settings.Standalone == XmlStandalone.Yes) { documentConformance = true; this.standalone = settings.Standalone; } if (documentConformance) { if (settings.Standalone == XmlStandalone.Yes) { this.wrapped.WriteStartDocument(true); } else { this.wrapped.WriteStartDocument(); } } if (settings.CDataSectionElements != null && settings.CDataSectionElements.Count > 0) { this.bitsCData = new BitStack(); this.lookupCDataElems = new Dictionary (); this.qnameCData = new XmlQualifiedName(); // Add each element name to the lookup table foreach (XmlQualifiedName name in settings.CDataSectionElements) { this.lookupCDataElems[name] = null; } this.bitsCData.PushBit(false); } } else if (settings.OutputMethod == XmlOutputMethod.Html) { // Html output method should output doc-type-decl if system ID or public ID is defined if (this.systemId != null || this.publicId != null) this.outputDocType = true; } } //----------------------------------------------- // XmlWriter interface //----------------------------------------------- public override WriteState WriteState { get { return this.wrapped.WriteState; } } public override void WriteStartDocument() { this.wrapped.WriteStartDocument(); } public override void WriteStartDocument(bool standalone) { this.wrapped.WriteStartDocument(standalone); } public override void WriteEndDocument() { this.wrapped.WriteEndDocument(); } /// /// Suppress this explicit call to WriteDocType if information was provided by XmlWriterSettings. /// public override void WriteDocType(string name, string pubid, string sysid, string subset) { if (this.publicId == null && this.systemId == null) { Debug.Assert(!this.outputDocType); this.wrapped.WriteDocType(name, pubid, sysid, subset); } } ////// Output doc-type-decl on the first element, and determine whether this element is a /// CData section element. /// public override void WriteStartElement(string prefix, string localName, string ns) { EndCDataSection(); // Output doc-type declaration immediately before first element is output if (this.outputDocType) { WriteState ws = this.wrapped.WriteState; if (ws == WriteState.Start || ws == WriteState.Prolog) { this.wrapped.WriteDocType( prefix.Length != 0 ? prefix + ":" + localName : localName, this.publicId, this.systemId, null ); } this.outputDocType = false; } this.wrapped.WriteStartElement(prefix, localName, ns); if (this.lookupCDataElems != null) { // Determine whether this element is a CData section element this.qnameCData.Init(localName, ns); this.bitsCData.PushBit(this.lookupCDataElems.ContainsKey(this.qnameCData)); } } public override void WriteEndElement() { EndCDataSection(); this.wrapped.WriteEndElement(); if (this.lookupCDataElems != null) this.bitsCData.PopBit(); } public override void WriteFullEndElement() { EndCDataSection(); this.wrapped.WriteFullEndElement(); if (this.lookupCDataElems != null) this.bitsCData.PopBit(); } public override void WriteStartAttribute(string prefix, string localName, string ns) { this.inAttr = true; this.wrapped.WriteStartAttribute(prefix, localName, ns); } public override void WriteEndAttribute() { this.inAttr = false; this.wrapped.WriteEndAttribute(); } public override void WriteCData(string text) { this.wrapped.WriteCData(text); } public override void WriteComment(string text) { EndCDataSection(); this.wrapped.WriteComment(text); } public override void WriteProcessingInstruction(string name, string text) { EndCDataSection(); this.wrapped.WriteProcessingInstruction(name, text); } public override void WriteWhitespace(string ws) { if (!this.inAttr && (this.inCDataSection || StartCDataSection())) this.wrapped.WriteCData(ws); else this.wrapped.WriteWhitespace(ws); } public override void WriteString(string text) { if (!this.inAttr && (this.inCDataSection || StartCDataSection())) this.wrapped.WriteCData(text); else this.wrapped.WriteString(text); } public override void WriteChars(char[] buffer, int index, int count) { if (!this.inAttr && (this.inCDataSection || StartCDataSection())) this.wrapped.WriteCData(new string(buffer, index, count)); else this.wrapped.WriteChars(buffer, index, count); } public override void WriteBase64(byte[] buffer, int index, int count) { if (!this.inAttr && (this.inCDataSection || StartCDataSection())) this.wrapped.WriteBase64(buffer, index, count); else this.wrapped.WriteBase64(buffer, index, count); } public override void WriteEntityRef(string name) { EndCDataSection(); this.wrapped.WriteEntityRef(name); } public override void WriteCharEntity(char ch) { EndCDataSection(); this.wrapped.WriteCharEntity(ch); } public override void WriteSurrogateCharEntity(char lowChar, char highChar) { EndCDataSection(); this.wrapped.WriteSurrogateCharEntity(lowChar, highChar); } public override void WriteRaw(char[] buffer, int index, int count) { if (!this.inAttr && (this.inCDataSection || StartCDataSection())) this.wrapped.WriteCData(new string(buffer, index, count)); else this.wrapped.WriteRaw(buffer, index, count); } public override void WriteRaw(string data) { if (!this.inAttr && (this.inCDataSection || StartCDataSection())) this.wrapped.WriteCData(data); else this.wrapped.WriteRaw(data); } public override void Close() { this.wrapped.Close(); } public override void Flush() { this.wrapped.Flush(); } public override string LookupPrefix(string ns) { return this.wrapped.LookupPrefix(ns); } //----------------------------------------------- // Helper methods //----------------------------------------------- ////// Write CData text if element is a CData element. Return true if text should be written /// within a CData section. /// private bool StartCDataSection() { Debug.Assert(!this.inCDataSection); if (this.lookupCDataElems != null && this.bitsCData.PeekBit()) { this.inCDataSection = true; return true; } return false; } ////// No longer write CData text. /// private void EndCDataSection() { this.inCDataSection = false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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