Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / Runtime / RtfNavigator.cs / 1305376 / RtfNavigator.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
//-----------------------------------------------------------------------------
using System;
using System.Threading;
using System.IO;
using System.Collections;
using System.Globalization;
using System.Text;
using System.Diagnostics;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Schema;
namespace System.Xml.Xsl.Runtime {
///
/// RtfNavigators store Xslt result-tree-fragments. At runtime, the Xslt library tests to see if a Navigator
/// is an RtfNavigator in order to enforce certain restrictions, such as prohibiting querying into Rtfs.
/// Furthermore, Rtfs must store extra serialization information required in order to properly implement the
/// Xslt disable-output-escaping flag.
///
internal abstract class RtfNavigator : XPathNavigator {
//-----------------------------------------------
// RtfNavigator
//-----------------------------------------------
///
/// Preserve serialization hints when deep copying.
///
public abstract void CopyToWriter(XmlWriter writer);
///
/// Discard serialization hints and return a navigator that actually allows navigation.
///
public abstract XPathNavigator ToNavigator();
//-----------------------------------------------
// XPathNavigator
//-----------------------------------------------
///
/// Get the XPath node type of the current node.
///
public override XPathNodeType NodeType {
get { return XPathNodeType.Root; }
}
///
/// Get the local name portion of the current node's name.
///
public override string LocalName {
get { return string.Empty; }
}
///
/// Get the namespace portion of the current node's name.
///
public override string NamespaceURI {
get { return string.Empty; }
}
///
/// Get the name of the current node.
///
public override string Name {
get { return string.Empty; }
}
///
/// Get the prefix portion of the current node's name.
///
public override string Prefix {
get { return string.Empty; }
}
///
/// Return true if this is an element which used a shortcut tag in its Xml 1.0 serialized form.
///
public override bool IsEmptyElement {
get { return false; }
}
///
/// Return the xml name table which was used to atomize all prefixes, local-names, and
/// namespace uris in the document.
///
public override XmlNameTable NameTable {
get { throw new NotSupportedException(); }
}
///
/// Position the navigator on the first attribute of the current node and return true. If no attributes
/// can be found, return false.
///
public override bool MoveToFirstAttribute() {
throw new NotSupportedException();
}
///
/// If positioned on an attribute, move to its next sibling attribute. If no attributes can be found,
/// return false.
///
public override bool MoveToNextAttribute() {
throw new NotSupportedException();
}
///
/// Position the navigator on the namespace within the specified scope. If no matching namespace
/// can be found, return false.
///
public override bool MoveToFirstNamespace(XPathNamespaceScope namespaceScope) {
throw new NotSupportedException();
}
///
/// Position the navigator on the next namespace within the specified scope. If no matching namespace
/// can be found, return false.
///
public override bool MoveToNextNamespace(XPathNamespaceScope namespaceScope) {
throw new NotSupportedException();
}
///
/// If the current node is an attribute or namespace (not content), return false. Otherwise,
/// move to the next content node. Return false if there are no more content nodes.
///
public override bool MoveToNext() {
throw new NotSupportedException();
}
///
/// If the current node is an attribute or namespace (not content), return false. Otherwise,
/// move to the previous (sibling) content node. Return false if there are no previous content nodes.
///
public override bool MoveToPrevious() {
throw new NotSupportedException();
}
///
/// Move to the first content-typed child of the current node. Return false if the current
/// node has no content children.
///
public override bool MoveToFirstChild() {
throw new NotSupportedException();
}
///
/// Position the navigator on the parent of the current node. If the current node has no parent,
/// return false.
///
public override bool MoveToParent() {
throw new NotSupportedException();
}
///
/// Position to the navigator to the element whose id is equal to the specified "id" string.
///
public override bool MoveToId(string id) {
throw new NotSupportedException();
}
///
/// Returns true if this navigator is positioned to the same node as the "other" navigator. Returns false
/// if not, or if the "other" navigator is not the same type as this navigator.
///
public override bool IsSamePosition(XPathNavigator other) {
throw new NotSupportedException();
}
}
///
/// This navigator is a cursor over a cache that stores Xslt disable-output-escaping flags.
///
internal sealed class RtfTreeNavigator : RtfNavigator {
private XmlEventCache events;
private NavigatorConstructor constr;
private XmlNameTable nameTable;
//-----------------------------------------------
// Constructors
//-----------------------------------------------
///
/// Create a new navigator over the specified cache of Xml events.
///
public RtfTreeNavigator(XmlEventCache events, XmlNameTable nameTable) {
this.events = events;
this.constr = new NavigatorConstructor();
this.nameTable = nameTable;
}
///
/// Copy constructor.
///
public RtfTreeNavigator(RtfTreeNavigator that) {
this.events = that.events;
this.constr = that.constr;
this.nameTable = that.nameTable;
}
//-----------------------------------------------
// RtfNavigator
//-----------------------------------------------
///
/// Preserve serialization hints when deep copying.
///
public override void CopyToWriter(XmlWriter writer) {
this.events.EventsToWriter(writer);
}
///
/// Discard serialization hints and return a navigator that actually allows navigation.
///
public override XPathNavigator ToNavigator() {
return this.constr.GetNavigator(this.events, this.nameTable);
}
//-----------------------------------------------
// XPathItem
//-----------------------------------------------
///
/// Get the string value of the current node, computed using data model dm:string-value rules.
/// If the node has a typed value, return the string representation of the value. If the node
/// is not a parent type (comment, text, pi, etc.), get its simple text value. Otherwise,
/// concatenate all text node descendants of the current node.
///
public override string Value {
get { return this.events.EventsToString(); }
}
//-----------------------------------------------
// XPathNavigator
//-----------------------------------------------
///
/// Get the base URI of the Rtf.
///
public override string BaseURI {
get { return this.events.BaseUri; }
}
///
/// Create a copy of this navigator, positioned to the same node in the tree.
///
public override XPathNavigator Clone() {
return new RtfTreeNavigator(this);
}
///
/// Position this navigator to the same position as the "other" navigator. If the "other" navigator
/// is not of the same type as this navigator, then return false.
///
public override bool MoveTo(XPathNavigator other) {
RtfTreeNavigator that = other as RtfTreeNavigator;
if (that != null) {
this.events = that.events;
this.constr = that.constr;
this.nameTable = that.nameTable;
return true;
}
return false;
}
}
///
/// This RtfNavigator specializes the case of a root node having a single text node child. This is a very common
/// case, such as in bar .
///
internal sealed class RtfTextNavigator : RtfNavigator {
private string text, baseUri;
private NavigatorConstructor constr;
//-----------------------------------------------
// Constructors
//-----------------------------------------------
///
/// Create a new navigator having a text node with value = "text" string.
///
public RtfTextNavigator(string text, string baseUri) {
this.text = text;
this.baseUri = baseUri;
this.constr = new NavigatorConstructor();
}
///
/// Copy constructor.
///
public RtfTextNavigator(RtfTextNavigator that) {
this.text = that.text;
this.baseUri = that.baseUri;
this.constr = that.constr;
}
//-----------------------------------------------
// RtfNavigator
//-----------------------------------------------
///
/// Preserve serialization hints when deep copying.
///
public override void CopyToWriter(XmlWriter writer) {
writer.WriteString(Value);
}
///
/// Discard serialization hints and return a navigator that actually allows navigation.
///
public override XPathNavigator ToNavigator() {
return this.constr.GetNavigator(this.text, this.baseUri, new NameTable());
}
//-----------------------------------------------
// XPathItem
//-----------------------------------------------
///
/// Get the string value of the current node, computed using data model dm:string-value rules.
/// If the node has a typed value, return the string representation of the value. If the node
/// is not a parent type (comment, text, pi, etc.), get its simple text value. Otherwise,
/// concatenate all text node descendants of the current node.
///
public override string Value {
get { return this.text; }
}
//-----------------------------------------------
// XPathNavigator
//-----------------------------------------------
///
/// Get the base URI of the Rtf.
///
public override string BaseURI {
get { return this.baseUri; }
}
///
/// Create a copy of this navigator, positioned to the same node in the tree.
///
public override XPathNavigator Clone() {
return new RtfTextNavigator(this);
}
///
/// Position this navigator to the same position as the "other" navigator. If the "other" navigator
/// is not of the same type as this navigator, then return false.
///
public override bool MoveTo(XPathNavigator other) {
RtfTextNavigator that = other as RtfTextNavigator;
if (that != null) {
this.text = that.text;
this.baseUri = that.baseUri;
this.constr = that.constr;
return true;
}
return false;
}
}
///
/// This class creates a document on the first call to GetNavigator(), and returns a Navigator from it. On
/// subsequent calls, Navigators from the same document are returned (no new document is created).
///
internal sealed class NavigatorConstructor {
object cache;
///
/// Create a document from the cache of events. If a document has already been created previously, return it.
/// This method is thread-safe, and is always guaranteed to return the exact same document, no matter how many
/// threads have called it concurrently.
///
public XPathNavigator GetNavigator(XmlEventCache events, XmlNameTable nameTable) {
if (this.cache == null) {
// Create XPathDocument from event cache
XPathDocument doc = new XPathDocument(nameTable);
XmlRawWriter writer = doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames | (events.HasRootNode ? XPathDocument.LoadFlags.None : XPathDocument.LoadFlags.Fragment), events.BaseUri);
events.EventsToWriter(writer);
writer.Close();
this.cache = doc;
}
return ((XPathDocument) this.cache).CreateNavigator();
}
///
/// Create a document containing a root node and a single text node child with "text" as its text value.
/// This method is thread-safe, and is always guaranteed to return the exact same document, no matter how many
/// threads have called it concurrently.
///
public XPathNavigator GetNavigator(string text, string baseUri, XmlNameTable nameTable) {
if (this.cache == null) {
// Create XPathDocument
XPathDocument doc = new XPathDocument(nameTable);
XmlRawWriter writer = doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames, baseUri);
writer.WriteString(text);
writer.Close();
this.cache = doc;
}
return ((XPathDocument) this.cache).CreateNavigator();
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// [....]
//-----------------------------------------------------------------------------
using System;
using System.Threading;
using System.IO;
using System.Collections;
using System.Globalization;
using System.Text;
using System.Diagnostics;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Schema;
namespace System.Xml.Xsl.Runtime {
///
/// RtfNavigators store Xslt result-tree-fragments. At runtime, the Xslt library tests to see if a Navigator
/// is an RtfNavigator in order to enforce certain restrictions, such as prohibiting querying into Rtfs.
/// Furthermore, Rtfs must store extra serialization information required in order to properly implement the
/// Xslt disable-output-escaping flag.
///
internal abstract class RtfNavigator : XPathNavigator {
//-----------------------------------------------
// RtfNavigator
//-----------------------------------------------
///
/// Preserve serialization hints when deep copying.
///
public abstract void CopyToWriter(XmlWriter writer);
///
/// Discard serialization hints and return a navigator that actually allows navigation.
///
public abstract XPathNavigator ToNavigator();
//-----------------------------------------------
// XPathNavigator
//-----------------------------------------------
///
/// Get the XPath node type of the current node.
///
public override XPathNodeType NodeType {
get { return XPathNodeType.Root; }
}
///
/// Get the local name portion of the current node's name.
///
public override string LocalName {
get { return string.Empty; }
}
///
/// Get the namespace portion of the current node's name.
///
public override string NamespaceURI {
get { return string.Empty; }
}
///
/// Get the name of the current node.
///
public override string Name {
get { return string.Empty; }
}
///
/// Get the prefix portion of the current node's name.
///
public override string Prefix {
get { return string.Empty; }
}
///
/// Return true if this is an element which used a shortcut tag in its Xml 1.0 serialized form.
///
public override bool IsEmptyElement {
get { return false; }
}
///
/// Return the xml name table which was used to atomize all prefixes, local-names, and
/// namespace uris in the document.
///
public override XmlNameTable NameTable {
get { throw new NotSupportedException(); }
}
///
/// Position the navigator on the first attribute of the current node and return true. If no attributes
/// can be found, return false.
///
public override bool MoveToFirstAttribute() {
throw new NotSupportedException();
}
///
/// If positioned on an attribute, move to its next sibling attribute. If no attributes can be found,
/// return false.
///
public override bool MoveToNextAttribute() {
throw new NotSupportedException();
}
///
/// Position the navigator on the namespace within the specified scope. If no matching namespace
/// can be found, return false.
///
public override bool MoveToFirstNamespace(XPathNamespaceScope namespaceScope) {
throw new NotSupportedException();
}
///
/// Position the navigator on the next namespace within the specified scope. If no matching namespace
/// can be found, return false.
///
public override bool MoveToNextNamespace(XPathNamespaceScope namespaceScope) {
throw new NotSupportedException();
}
///
/// If the current node is an attribute or namespace (not content), return false. Otherwise,
/// move to the next content node. Return false if there are no more content nodes.
///
public override bool MoveToNext() {
throw new NotSupportedException();
}
///
/// If the current node is an attribute or namespace (not content), return false. Otherwise,
/// move to the previous (sibling) content node. Return false if there are no previous content nodes.
///
public override bool MoveToPrevious() {
throw new NotSupportedException();
}
///
/// Move to the first content-typed child of the current node. Return false if the current
/// node has no content children.
///
public override bool MoveToFirstChild() {
throw new NotSupportedException();
}
///
/// Position the navigator on the parent of the current node. If the current node has no parent,
/// return false.
///
public override bool MoveToParent() {
throw new NotSupportedException();
}
///
/// Position to the navigator to the element whose id is equal to the specified "id" string.
///
public override bool MoveToId(string id) {
throw new NotSupportedException();
}
///
/// Returns true if this navigator is positioned to the same node as the "other" navigator. Returns false
/// if not, or if the "other" navigator is not the same type as this navigator.
///
public override bool IsSamePosition(XPathNavigator other) {
throw new NotSupportedException();
}
}
///
/// This navigator is a cursor over a cache that stores Xslt disable-output-escaping flags.
///
internal sealed class RtfTreeNavigator : RtfNavigator {
private XmlEventCache events;
private NavigatorConstructor constr;
private XmlNameTable nameTable;
//-----------------------------------------------
// Constructors
//-----------------------------------------------
///
/// Create a new navigator over the specified cache of Xml events.
///
public RtfTreeNavigator(XmlEventCache events, XmlNameTable nameTable) {
this.events = events;
this.constr = new NavigatorConstructor();
this.nameTable = nameTable;
}
///
/// Copy constructor.
///
public RtfTreeNavigator(RtfTreeNavigator that) {
this.events = that.events;
this.constr = that.constr;
this.nameTable = that.nameTable;
}
//-----------------------------------------------
// RtfNavigator
//-----------------------------------------------
///
/// Preserve serialization hints when deep copying.
///
public override void CopyToWriter(XmlWriter writer) {
this.events.EventsToWriter(writer);
}
///
/// Discard serialization hints and return a navigator that actually allows navigation.
///
public override XPathNavigator ToNavigator() {
return this.constr.GetNavigator(this.events, this.nameTable);
}
//-----------------------------------------------
// XPathItem
//-----------------------------------------------
///
/// Get the string value of the current node, computed using data model dm:string-value rules.
/// If the node has a typed value, return the string representation of the value. If the node
/// is not a parent type (comment, text, pi, etc.), get its simple text value. Otherwise,
/// concatenate all text node descendants of the current node.
///
public override string Value {
get { return this.events.EventsToString(); }
}
//-----------------------------------------------
// XPathNavigator
//-----------------------------------------------
///
/// Get the base URI of the Rtf.
///
public override string BaseURI {
get { return this.events.BaseUri; }
}
///
/// Create a copy of this navigator, positioned to the same node in the tree.
///
public override XPathNavigator Clone() {
return new RtfTreeNavigator(this);
}
///
/// Position this navigator to the same position as the "other" navigator. If the "other" navigator
/// is not of the same type as this navigator, then return false.
///
public override bool MoveTo(XPathNavigator other) {
RtfTreeNavigator that = other as RtfTreeNavigator;
if (that != null) {
this.events = that.events;
this.constr = that.constr;
this.nameTable = that.nameTable;
return true;
}
return false;
}
}
///
/// This RtfNavigator specializes the case of a root node having a single text node child. This is a very common
/// case, such as in bar .
///
internal sealed class RtfTextNavigator : RtfNavigator {
private string text, baseUri;
private NavigatorConstructor constr;
//-----------------------------------------------
// Constructors
//-----------------------------------------------
///
/// Create a new navigator having a text node with value = "text" string.
///
public RtfTextNavigator(string text, string baseUri) {
this.text = text;
this.baseUri = baseUri;
this.constr = new NavigatorConstructor();
}
///
/// Copy constructor.
///
public RtfTextNavigator(RtfTextNavigator that) {
this.text = that.text;
this.baseUri = that.baseUri;
this.constr = that.constr;
}
//-----------------------------------------------
// RtfNavigator
//-----------------------------------------------
///
/// Preserve serialization hints when deep copying.
///
public override void CopyToWriter(XmlWriter writer) {
writer.WriteString(Value);
}
///
/// Discard serialization hints and return a navigator that actually allows navigation.
///
public override XPathNavigator ToNavigator() {
return this.constr.GetNavigator(this.text, this.baseUri, new NameTable());
}
//-----------------------------------------------
// XPathItem
//-----------------------------------------------
///
/// Get the string value of the current node, computed using data model dm:string-value rules.
/// If the node has a typed value, return the string representation of the value. If the node
/// is not a parent type (comment, text, pi, etc.), get its simple text value. Otherwise,
/// concatenate all text node descendants of the current node.
///
public override string Value {
get { return this.text; }
}
//-----------------------------------------------
// XPathNavigator
//-----------------------------------------------
///
/// Get the base URI of the Rtf.
///
public override string BaseURI {
get { return this.baseUri; }
}
///
/// Create a copy of this navigator, positioned to the same node in the tree.
///
public override XPathNavigator Clone() {
return new RtfTextNavigator(this);
}
///
/// Position this navigator to the same position as the "other" navigator. If the "other" navigator
/// is not of the same type as this navigator, then return false.
///
public override bool MoveTo(XPathNavigator other) {
RtfTextNavigator that = other as RtfTextNavigator;
if (that != null) {
this.text = that.text;
this.baseUri = that.baseUri;
this.constr = that.constr;
return true;
}
return false;
}
}
///
/// This class creates a document on the first call to GetNavigator(), and returns a Navigator from it. On
/// subsequent calls, Navigators from the same document are returned (no new document is created).
///
internal sealed class NavigatorConstructor {
object cache;
///
/// Create a document from the cache of events. If a document has already been created previously, return it.
/// This method is thread-safe, and is always guaranteed to return the exact same document, no matter how many
/// threads have called it concurrently.
///
public XPathNavigator GetNavigator(XmlEventCache events, XmlNameTable nameTable) {
if (this.cache == null) {
// Create XPathDocument from event cache
XPathDocument doc = new XPathDocument(nameTable);
XmlRawWriter writer = doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames | (events.HasRootNode ? XPathDocument.LoadFlags.None : XPathDocument.LoadFlags.Fragment), events.BaseUri);
events.EventsToWriter(writer);
writer.Close();
this.cache = doc;
}
return ((XPathDocument) this.cache).CreateNavigator();
}
///
/// Create a document containing a root node and a single text node child with "text" as its text value.
/// This method is thread-safe, and is always guaranteed to return the exact same document, no matter how many
/// threads have called it concurrently.
///
public XPathNavigator GetNavigator(string text, string baseUri, XmlNameTable nameTable) {
if (this.cache == null) {
// Create XPathDocument
XPathDocument doc = new XPathDocument(nameTable);
XmlRawWriter writer = doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames, baseUri);
writer.WriteString(text);
writer.Close();
this.cache = doc;
}
return ((XPathDocument) this.cache).CreateNavigator();
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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