Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / XsltOld / ActionFrame.cs / 1305376 / ActionFrame.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace System.Xml.Xsl.XsltOld { using Res = System.Xml.Utils.Res; using System; using System.Xml; using System.Xml.XPath; using MS.Internal.Xml.XPath; using System.Collections; using System.Collections.Generic; using System.Diagnostics; using System.Xml.Xsl.XsltOld.Debugger; internal class ActionFrame : IStackFrame { private int state; // Action execution state private int counter; // Counter, for the use of particular action private object [] variables; // Store for template local variable values private Hashtable withParams; private Action action; // Action currently being executed private ActionFrame container; // Frame of enclosing container action and index within it private int currentAction; private XPathNodeIterator nodeSet; // Current node set private XPathNodeIterator newNodeSet; // Node set for processing children or other templates // Variables to store action data between states: private PrefixQName calulatedName; // Used in ElementAction and AttributeAction private string storedOutput; // Used in NumberAction, CopyOfAction, ValueOfAction and ProcessingInstructionAction internal PrefixQName CalulatedName { get { return this.calulatedName; } set { this.calulatedName = value; } } internal string StoredOutput { get { return this.storedOutput; } set { this.storedOutput = value; } } internal int State { get { return this.state; } set { this.state = value; } } internal int Counter { get { return this.counter; } set { this.counter = value; } } internal ActionFrame Container { get { return this.container; } } internal XPathNavigator Node { get { if (this.nodeSet != null) { return this.nodeSet.Current; } return null; } } internal XPathNodeIterator NodeSet { get { return this.nodeSet; } } internal XPathNodeIterator NewNodeSet { get { return this.newNodeSet; } } internal int IncrementCounter() { return ++ this.counter; } [System.Runtime.TargetedPatchingOptOutAttribute("Performance critical to inline across NGen image boundaries")] internal void AllocateVariables(int count) { if (0 < count) { this.variables = new object [count]; } else { this.variables = null; } } internal object GetVariable(int index) { Debug.Assert(this.variables != null && index < this.variables.Length); return this.variables[index]; } internal void SetVariable(int index, object value) { Debug.Assert(this.variables != null && index < this.variables.Length); this.variables[index] = value; } internal void SetParameter(XmlQualifiedName name, object value) { if (this.withParams == null) { this.withParams = new Hashtable(); } Debug.Assert(! this.withParams.Contains(name), "We should check duplicate params at compile time"); this.withParams[name] = value; } internal void ResetParams() { if (this.withParams != null) this.withParams.Clear(); } internal object GetParameter(XmlQualifiedName name) { if (this.withParams != null) { return this.withParams[name]; } return null; } internal void InitNodeSet(XPathNodeIterator nodeSet) { Debug.Assert(nodeSet != null); this.nodeSet = nodeSet; } internal void InitNewNodeSet(XPathNodeIterator nodeSet) { Debug.Assert(nodeSet != null); this.newNodeSet = nodeSet; } internal void SortNewNodeSet(Processor proc, ArrayList sortarray) { Debug.Assert(0 < sortarray.Count); int numSorts = sortarray.Count; XPathSortComparer comparer = new XPathSortComparer(numSorts); for (int i = 0; i < numSorts; i++) { Sort sort = (Sort) sortarray[i]; Query expr = proc.GetCompiledQuery(sort.select); comparer.AddSort(expr, new XPathComparerHelper(sort.order, sort.caseOrder, sort.lang, sort.dataType)); } Listresults = new List (); Debug.Assert(proc.ActionStack.Peek() == this, "the trick we are doing with proc.Current will work only if this is topmost frame"); while (NewNextNode(proc)) { XPathNodeIterator savedNodeset = this.nodeSet; this.nodeSet = this.newNodeSet; // trick proc.Current node SortKey key = new SortKey(numSorts, /*originalPosition:*/results.Count, this.newNodeSet.Current.Clone()); for (int j = 0; j < numSorts; j ++) { key[j] = comparer.Expression(j).Evaluate(this.newNodeSet); } results.Add(key); this.nodeSet = savedNodeset; // restore proc.Current node } results.Sort(comparer); this.newNodeSet = new XPathSortArrayIterator(results); } // Finished internal void Finished() { State = Action.Finished; } internal void Inherit(ActionFrame parent) { Debug.Assert(parent != null); this.variables = parent.variables; } private void Init(Action action, ActionFrame container, XPathNodeIterator nodeSet) { this.state = Action.Initialized; this.action = action; this.container = container; this.currentAction = 0; this.nodeSet = nodeSet; this.newNodeSet = null; } internal void Init(Action action, XPathNodeIterator nodeSet) { Init(action, null, nodeSet); } internal void Init(ActionFrame containerFrame, XPathNodeIterator nodeSet) { Init(containerFrame.GetAction(0), containerFrame, nodeSet); } internal void SetAction(Action action) { SetAction(action, Action.Initialized); } internal void SetAction(Action action, int state) { this.action = action; this.state = state; } private Action GetAction(int actionIndex) { Debug.Assert(this.action is ContainerAction); return((ContainerAction) this.action).GetAction(actionIndex); } internal void Exit() { Finished(); this.container = null; } /* * Execute * return values: true - pop, false - nothing */ internal bool Execute(Processor processor) { if (this.action == null) { return true; } // Execute the action this.action.Execute(processor, this); // Process results if (State == Action.Finished) { // Advanced to next action if(this.container != null) { this.currentAction ++; this.action = this.container.GetAction(this.currentAction); State = Action.Initialized; } else { this.action = null; } return this.action == null; } return false; // Do not pop, unless specified otherwise } internal bool NextNode(Processor proc) { bool next = this.nodeSet.MoveNext(); if (next && proc.Stylesheet.Whitespace) { XPathNodeType type = this.nodeSet.Current.NodeType; if (type == XPathNodeType.Whitespace) { XPathNavigator nav = this.nodeSet.Current.Clone(); bool flag; do { nav.MoveTo(this.nodeSet.Current); nav.MoveToParent(); flag = ! proc.Stylesheet.PreserveWhiteSpace(proc, nav) && (next = this.nodeSet.MoveNext()); type = this.nodeSet.Current.NodeType; } while (flag && (type == XPathNodeType.Whitespace )); } } return next; } internal bool NewNextNode(Processor proc) { bool next = this.newNodeSet.MoveNext(); if (next && proc.Stylesheet.Whitespace) { XPathNodeType type = this.newNodeSet.Current.NodeType; if (type == XPathNodeType.Whitespace) { XPathNavigator nav = this.newNodeSet.Current.Clone(); bool flag; do { nav.MoveTo(this.newNodeSet.Current); nav.MoveToParent(); flag = ! proc.Stylesheet.PreserveWhiteSpace(proc, nav) && (next = this.newNodeSet.MoveNext()) ; type = this.newNodeSet.Current.NodeType; } while(flag && (type == XPathNodeType.Whitespace )); } } return next; } // ----------------------- IStackFrame : -------------------- XPathNavigator IStackFrame.Instruction { get { if (this.action == null) { return null; // for builtIn action this shoud be null; } return this.action.GetDbgData(this).StyleSheet; } } XPathNodeIterator IStackFrame.NodeSet { get { return this.nodeSet.Clone(); } } // Variables: int IStackFrame.GetVariablesCount() { if (this.action == null) { return 0; } return this.action.GetDbgData(this).Variables.Length; } XPathNavigator IStackFrame.GetVariable(int varIndex) { return this.action.GetDbgData(this).Variables[varIndex].GetDbgData(null).StyleSheet; } object IStackFrame.GetVariableValue(int varIndex) { return GetVariable(this.action.GetDbgData(this).Variables[varIndex].VarKey); } // special array iterator that iterates over ArrayList of SortKey private class XPathSortArrayIterator : XPathArrayIterator { public XPathSortArrayIterator(List list) : base(list) { } public XPathSortArrayIterator(XPathSortArrayIterator it) : base(it) {} public override XPathNodeIterator Clone() { return new XPathSortArrayIterator(this); } public override XPathNavigator Current { get { Debug.Assert(index > 0, "MoveNext() wasn't called"); return ((SortKey) this.list[this.index - 1]).Node; } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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