Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / Runtime / WhitespaceRuleReader.cs / 1305376 / WhitespaceRuleReader.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System; using System.IO; using System.Xml; using System.Xml.Schema; using System.Diagnostics; using MS.Internal.Xml; namespace System.Xml.Xsl.Runtime { ////// internal class WhitespaceRuleReader : XmlWrappingReader { private WhitespaceRuleLookup wsRules; private BitStack stkStrip; private bool shouldStrip, preserveAdjacent; private string val; private XmlCharType xmlCharType = XmlCharType.Instance; static public XmlReader CreateReader(XmlReader baseReader, WhitespaceRuleLookup wsRules) { if (wsRules == null) { return baseReader; // There is no rules to process } XmlReaderSettings readerSettings = baseReader.Settings; if (readerSettings != null) { if (readerSettings.IgnoreWhitespace) { return baseReader; // V2 XmlReader that strips all WS } } else { XmlTextReader txtReader = baseReader as XmlTextReader; if (txtReader != null && txtReader.WhitespaceHandling == WhitespaceHandling.None) { return baseReader; // V1 XmlTextReader that strips all WS } XmlTextReaderImpl txtReaderImpl = baseReader as XmlTextReaderImpl; if (txtReaderImpl != null && txtReaderImpl.WhitespaceHandling == WhitespaceHandling.None) { return baseReader; // XmlTextReaderImpl that strips all WS } } return new WhitespaceRuleReader(baseReader, wsRules); } private WhitespaceRuleReader(XmlReader baseReader, WhitespaceRuleLookup wsRules) : base(baseReader) { Debug.Assert(wsRules != null); this.val = null; this.stkStrip = new BitStack(); this.shouldStrip = false; this.preserveAdjacent = false; this.wsRules = wsRules; this.wsRules.Atomize(baseReader.NameTable); } ////// Override Value in order to possibly prepend extra whitespace. /// public override string Value { get { return (this.val == null) ? base.Value : this.val; } } ////// Override Read in order to search for strippable whitespace, to concatenate adjacent text nodes, and to /// resolve entities. /// public override bool Read() { XmlCharType xmlCharType = XmlCharType.Instance; string ws = null; // Clear text value this.val = null; while (base.Read()) { switch (base.NodeType) { case XmlNodeType.Element: // Push boolean indicating whether whitespace children of this element should be stripped if (!base.IsEmptyElement) { this.stkStrip.PushBit(this.shouldStrip); // Strip if rules say we should and we're not within the scope of xml:space="preserve" this.shouldStrip = wsRules.ShouldStripSpace(base.LocalName, base.NamespaceURI) && (base.XmlSpace != XmlSpace.Preserve); } break; case XmlNodeType.EndElement: // Restore parent shouldStrip setting this.shouldStrip = this.stkStrip.PopBit(); break; case XmlNodeType.Text: case XmlNodeType.CDATA: // If preserving adjacent text, don't perform any further checks if (this.preserveAdjacent) return true; if (this.shouldStrip) { // Reader may report whitespace as Text or CDATA if (xmlCharType.IsOnlyWhitespace(base.Value)) goto case XmlNodeType.Whitespace; // If whitespace was cached, then prepend it to text or CDATA value if (ws != null) this.val = string.Concat(ws, base.Value); // Preserve adjacent whitespace this.preserveAdjacent = true; return true; } break; case XmlNodeType.Whitespace: case XmlNodeType.SignificantWhitespace: // If preserving adjacent text, don't perform any further checks if (this.preserveAdjacent) return true; if (this.shouldStrip) { // Save whitespace until it can be determined whether it will be stripped if (ws == null) ws = base.Value; else ws = string.Concat(ws, base.Value); // Read next event continue; } break; case XmlNodeType.EndEntity: // Read next event continue; } // No longer preserve adjacent space this.preserveAdjacent = false; return true; } return false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- using System; using System.IO; using System.Xml; using System.Xml.Schema; using System.Diagnostics; using MS.Internal.Xml; namespace System.Xml.Xsl.Runtime { ////// internal class WhitespaceRuleReader : XmlWrappingReader { private WhitespaceRuleLookup wsRules; private BitStack stkStrip; private bool shouldStrip, preserveAdjacent; private string val; private XmlCharType xmlCharType = XmlCharType.Instance; static public XmlReader CreateReader(XmlReader baseReader, WhitespaceRuleLookup wsRules) { if (wsRules == null) { return baseReader; // There is no rules to process } XmlReaderSettings readerSettings = baseReader.Settings; if (readerSettings != null) { if (readerSettings.IgnoreWhitespace) { return baseReader; // V2 XmlReader that strips all WS } } else { XmlTextReader txtReader = baseReader as XmlTextReader; if (txtReader != null && txtReader.WhitespaceHandling == WhitespaceHandling.None) { return baseReader; // V1 XmlTextReader that strips all WS } XmlTextReaderImpl txtReaderImpl = baseReader as XmlTextReaderImpl; if (txtReaderImpl != null && txtReaderImpl.WhitespaceHandling == WhitespaceHandling.None) { return baseReader; // XmlTextReaderImpl that strips all WS } } return new WhitespaceRuleReader(baseReader, wsRules); } private WhitespaceRuleReader(XmlReader baseReader, WhitespaceRuleLookup wsRules) : base(baseReader) { Debug.Assert(wsRules != null); this.val = null; this.stkStrip = new BitStack(); this.shouldStrip = false; this.preserveAdjacent = false; this.wsRules = wsRules; this.wsRules.Atomize(baseReader.NameTable); } ////// Override Value in order to possibly prepend extra whitespace. /// public override string Value { get { return (this.val == null) ? base.Value : this.val; } } ////// Override Read in order to search for strippable whitespace, to concatenate adjacent text nodes, and to /// resolve entities. /// public override bool Read() { XmlCharType xmlCharType = XmlCharType.Instance; string ws = null; // Clear text value this.val = null; while (base.Read()) { switch (base.NodeType) { case XmlNodeType.Element: // Push boolean indicating whether whitespace children of this element should be stripped if (!base.IsEmptyElement) { this.stkStrip.PushBit(this.shouldStrip); // Strip if rules say we should and we're not within the scope of xml:space="preserve" this.shouldStrip = wsRules.ShouldStripSpace(base.LocalName, base.NamespaceURI) && (base.XmlSpace != XmlSpace.Preserve); } break; case XmlNodeType.EndElement: // Restore parent shouldStrip setting this.shouldStrip = this.stkStrip.PopBit(); break; case XmlNodeType.Text: case XmlNodeType.CDATA: // If preserving adjacent text, don't perform any further checks if (this.preserveAdjacent) return true; if (this.shouldStrip) { // Reader may report whitespace as Text or CDATA if (xmlCharType.IsOnlyWhitespace(base.Value)) goto case XmlNodeType.Whitespace; // If whitespace was cached, then prepend it to text or CDATA value if (ws != null) this.val = string.Concat(ws, base.Value); // Preserve adjacent whitespace this.preserveAdjacent = true; return true; } break; case XmlNodeType.Whitespace: case XmlNodeType.SignificantWhitespace: // If preserving adjacent text, don't perform any further checks if (this.preserveAdjacent) return true; if (this.shouldStrip) { // Save whitespace until it can be determined whether it will be stripped if (ws == null) ws = base.Value; else ws = string.Concat(ws, base.Value); // Read next event continue; } break; case XmlNodeType.EndEntity: // Read next event continue; } // No longer preserve adjacent space this.preserveAdjacent = false; return true; } return false; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- TypeDescriptionProviderAttribute.cs
- SQLDouble.cs
- SamlAdvice.cs
- CommandHelper.cs
- ButtonBase.cs
- HandlerMappingMemo.cs
- TakeQueryOptionExpression.cs
- HostingEnvironment.cs
- GreaterThan.cs
- DataGridColumnCollection.cs
- EnvelopedPkcs7.cs
- MailAddress.cs
- StdValidatorsAndConverters.cs
- Package.cs
- SatelliteContractVersionAttribute.cs
- FastEncoderWindow.cs
- SecurityProtocolFactory.cs
- PageCodeDomTreeGenerator.cs
- DetailsViewPagerRow.cs
- NTAccount.cs
- TreeBuilder.cs
- CapabilitiesUse.cs
- UnsafeNativeMethods.cs
- RadioButton.cs
- ToolStripGripRenderEventArgs.cs
- ObjectView.cs
- XmlWriterTraceListener.cs
- OleStrCAMarshaler.cs
- SmiEventSink_Default.cs
- SiteMapNodeCollection.cs
- TreeNodeEventArgs.cs
- UpdatePanelControlTrigger.cs
- WebPartDeleteVerb.cs
- ReplacementText.cs
- Figure.cs
- DataView.cs
- SubclassTypeValidatorAttribute.cs
- SQLBinary.cs
- DocumentViewer.cs
- TypeConverterAttribute.cs
- AmbientValueAttribute.cs
- PathGeometry.cs
- GlobalAllocSafeHandle.cs
- ContainerParagraph.cs
- WebPartVerbCollection.cs
- Source.cs
- BitmapEffectInput.cs
- ObjectConverter.cs
- StickyNote.cs
- ActivityBuilderHelper.cs
- TextBoxBaseDesigner.cs
- ControlCachePolicy.cs
- Rotation3DKeyFrameCollection.cs
- CodeMemberEvent.cs
- InternalTypeHelper.cs
- CdpEqualityComparer.cs
- HtmlSelect.cs
- PenThread.cs
- DataReceivedEventArgs.cs
- Rect3D.cs
- SystemWebSectionGroup.cs
- InheritedPropertyChangedEventArgs.cs
- OdbcConnectionStringbuilder.cs
- SocketInformation.cs
- SoapFaultCodes.cs
- FixedPage.cs
- TextRangeBase.cs
- NullRuntimeConfig.cs
- ListBox.cs
- ChooseAction.cs
- Properties.cs
- MetafileHeader.cs
- EntityTemplateFactory.cs
- FtpRequestCacheValidator.cs
- AsyncSerializedWorker.cs
- TextServicesCompartment.cs
- WebPartZoneDesigner.cs
- ImagingCache.cs
- ConfigXmlAttribute.cs
- CompareInfo.cs
- LogExtent.cs
- ReadOnlyHierarchicalDataSource.cs
- DataGridViewTextBoxColumn.cs
- RoutedEvent.cs
- PreservationFileWriter.cs
- StaticFileHandler.cs
- ControlCachePolicy.cs
- TdsParserStaticMethods.cs
- ReadOnlyDataSourceView.cs
- TraceHandler.cs
- Expression.cs
- SolidColorBrush.cs
- DateTimeOffset.cs
- RpcAsyncResult.cs
- PlaceHolder.cs
- WindowsSolidBrush.cs
- HostAdapter.cs
- basecomparevalidator.cs
- NativeMethods.cs
- ThicknessAnimationBase.cs