grammarelement.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Speech / Src / Internal / SrgsCompiler / grammarelement.cs / 1 / grammarelement.cs
                        
                        
                            //  
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//
// 
// Description:
// 
// History: 
//		6/1/2004	[....]		Converted from the managed code
//      10/1/2004   [....]      Added Custom grammar support 
//----------------------------------------------------------------------------

using System;
using System.Collections.Generic; 
using System.Collections.ObjectModel;
using System.Globalization; 
using System.Speech.Internal.SrgsParser; 

namespace System.Speech.Internal.SrgsCompiler 
{
    internal class GrammarElement : ParseElement, IGrammar
    {
        //******************************************************************* 
        //
        // Constructors 
        // 
        //*******************************************************************
 
        #region Constructors

#if !NO_STG
        internal GrammarElement (Backend backend, CustomGrammar cg) 
            : base (null)
        { 
            _cg = cg; 
#else
        internal GrammarElement (Backend backend) 
            : base (null)
        {
#endif
            _backend = backend; 
        }
 
        #endregion 

        //******************************************************************* 
        //
        // Internal Method
        //
        //******************************************************************** 

        #region Internal Method 
 
        string IGrammar.Root
        { 
            set
            {
                _sRoot = value;
            } 
            get
            { 
                return _sRoot; 
            }
        } 

        IRule IGrammar.CreateRule (string id, RulePublic publicRule, RuleDynamic dynamic, bool hasScript)
        {
            SPCFGRULEATTRIBUTES dwRuleAttributes = 0; 

            // Determine rule attributes to apply based on RuleScope, IsDynamic, and IsRootRule. 
            //  IsRootRule  RuleScope   IsDynamic   Rule Attributes 
            //  ---------------------------------------------------------------------
            //  true        *           true        Root | Active | TopLevel | Export | Dynamic 
            //  true        *           false       Root | Active | TopLevel | Export
            //  false       internal    true        TopLevel | Export | Dynamic
            //  false       internal    false       TopLevel | Export
            //  false       private     true        Dynamic 
            //  false       private     false       0
            if (id == _sRoot) 
            { 
                dwRuleAttributes |= SPCFGRULEATTRIBUTES.SPRAF_Root | SPCFGRULEATTRIBUTES.SPRAF_Active | SPCFGRULEATTRIBUTES.SPRAF_TopLevel;
                _hasRoot = true; 
            }

            if (publicRule == RulePublic.True)
            { 
                dwRuleAttributes |= SPCFGRULEATTRIBUTES.SPRAF_TopLevel | SPCFGRULEATTRIBUTES.SPRAF_Export;
            } 
 
            if (dynamic == RuleDynamic.True)
            { 
                // BackEnd supports exported dynamic rules for SRGS grammars.
                dwRuleAttributes |= SPCFGRULEATTRIBUTES.SPRAF_Dynamic;
            }
 
            // Create rule with specified attributes
            Rule rule = GetRule (id, dwRuleAttributes); 
 
#if !NO_STG
            // Add this rule to the list of rules of the STG list 
            if (publicRule == RulePublic.True || id == _sRoot || hasScript)
            {
                _cg._rules.Add (rule);
            } 
#endif
            return (IRule) rule; 
        } 

        void IElement.PostParse (IElement parent) 
        {
            if (_sRoot != null && !_hasRoot)
            {
                // "Root rule ""%s"" is undefined." 
                XmlParser.ThrowSrgsException (SRID.RootNotDefined, _sRoot);
            } 
 
            if (_undefRules.Count > 0)
            { 
                // "Root rule ""%s"" is undefined."
                Rule rule = _undefRules [0];
                XmlParser.ThrowSrgsException (SRID.UndefRuleRef, rule.Name);
            } 

#if !NO_STG 
            // SAPI semantics only for .Net Semantics 
            bool containsCode = ((IGrammar) this).CodeBehind.Count > 0 || ((IGrammar) this).ImportNamespaces.Count > 0 || ((IGrammar) this).AssemblyReferences.Count > 0 || CustomGrammar._scriptRefs.Count > 0;
            if (containsCode && ((IGrammar) this).TagFormat != System.Speech.Recognition.SrgsGrammar.SrgsTagFormat.KeyValuePairs) 
            {
                XmlParser.ThrowSrgsException (SRID.InvalidSemanticProcessingType);
            }
#endif 
        }
 
#if !NO_STG 

        internal void AddScript (string name, string code) 
        {
            foreach (Rule rule in _cg._rules)
            {
                if (rule.Name == name) 
                {
                    rule.Script.Append (code); 
                    break; 
                }
            } 
        }

#endif
        #endregion 

        //******************************************************************** 
        // 
        // Internal Properties
        // 
        //********************************************************************

        #region Internal Properties
 
        /// |summary|
        /// Base URI of grammar (xml:base) 
        /// |/summary| 
        /// |remarks|
        /// 

        Uri IGrammar.XmlBase
        {
            set 
            {
                if (value != null) 
                { 
                    _backend.SetBasePath (value.ToString ());
                } 
            }
        }

        /// |summary| 
        /// GrammarElement language (xml:lang)
        /// |/summary| 
        CultureInfo IGrammar.Culture 
        {
            set 
            {
                Helpers.ThrowIfNull (value, "value");

                _backend.LangId = value.LCID; 
            }
        } 
 
        /// |summary|
        /// GrammarElement mode.  voice or dtmf 
        /// |/summary|
        GrammarType IGrammar.Mode
        {
            set 
            {
                _backend.GrammarMode = value; 
            } 
        }
 
        /// |summary|
        /// GrammarElement mode.  voice or dtmf
        /// |/summary|
        AlphabetType IGrammar.PhoneticAlphabet 
        {
            set 
            { 
                _backend.Alphabet = value;
            } 
        }

        /// |summary|
        /// Tag format (srgs:tag-format) 
        /// |/summary|
        System.Speech.Recognition.SrgsGrammar.SrgsTagFormat IGrammar.TagFormat 
        { 
            get
            { 
                return System.Speech.Recognition.SrgsGrammar.SrgsDocument.GrammarOptions2TagFormat (_backend.GrammarOptions);
            }
            set
            { 
                _backend.GrammarOptions = System.Speech.Recognition.SrgsGrammar.SrgsDocument.TagFormat2GrammarOptions (value);
            } 
        } 

        /// |summary| 
        /// Tag format (srgs:tag-format)
        /// |/summary|
        Collection IGrammar.GlobalTags
        { 
            get
            { 
                return _backend.GlobalTags; 
            }
            set 
            {
                _backend.GlobalTags = value;
            }
        } 

        internal List UndefRules 
        { 
            get
            { 
                return _undefRules;
            }
        }
 
        internal Backend Backend
        { 
            get 
            {
                return _backend; 
            }
        }

#if !NO_STG 

        /// |summary| 
        /// language 
        /// |/summary|
        string IGrammar.Language 
        {
            set
            {
                _cg._language = value; 
            }
            get 
            { 
                return _cg._language;
            } 
        }

        /// |summary|
        /// namespace 
        /// |/summary|
        string IGrammar.Namespace 
        { 
            set
            { 
                _cg._namespace = value;
            }
            get
            { 
                return _cg._namespace;
            } 
        } 

        /// |summary| 
        /// CodeBehind
        /// |/summary|
        Collection IGrammar.CodeBehind
        { 
            set
            { 
                _cg._codebehind = value; 
            }
            get 
            {
                return _cg._codebehind;
            }
        } 

        /// |summary| 
        /// Add #line statements to the inline scripts if set 
        /// |/summary|
        bool IGrammar.Debug 
        {
            set
            {
                _cg._fDebugScript = value; 
            }
        } 
 
        /// |summary|
        /// ImportNameSpaces 
        /// |/summary|
        Collection IGrammar.ImportNamespaces
        {
            set 
            {
                _cg._importNamespaces = value; 
            } 
            get
            { 
                return _cg._importNamespaces;
            }
        }
 
        /// |summary|
        /// ImportNameSpaces 
        /// |/summary| 
        Collection IGrammar.AssemblyReferences
        { 
            set
            {
                _cg._assemblyReferences = value;
            } 
            get
            { 
                return _cg._assemblyReferences; 
            }
        } 

        internal CustomGrammar CustomGrammar
        {
            get 
            {
                return _cg; 
            } 
        }
 
#endif
        #endregion

        //******************************************************************* 
        //
        // Private Methods 
        // 
        //********************************************************************
 
        #region Private Methods

        /// 
        /// Create a new rule with the specified name and attribute, and return the initial state. 
        /// Verify if Rule is unique.  A Rule may already have been created as a placeholder during RuleRef.
        ///  
        /// Rule name 
        /// Rule attributes
        ///  
        private Rule GetRule (string sRuleId, SPCFGRULEATTRIBUTES dwAttributes)
        {
            System.Diagnostics.Debug.Assert (!string.IsNullOrEmpty (sRuleId));
 
            // Check if RuleID is unique.
            Rule rule = _backend.FindRule (sRuleId); 
 
            if (rule != null)
            { 
                // Rule already defined.  Check if it is a placeholder.
                int iRule = _undefRules.IndexOf (rule);

                if (iRule != -1) 
                {
                    // This is a UndefinedRule created as a placeholder for a RuleRef. 
                    // - Update placeholder rule with correct attributes. 
                    _backend.SetRuleAttributes (rule, dwAttributes);
 
                    // - Remove this now defined rule from UndefinedRules.
                    //   Swap top element with this rule and pop the top element.
                    _undefRules.RemoveAt (iRule);
                } 
                else
                { 
                    // Multiple definitions of the same Rule. 
                    XmlParser.ThrowSrgsException (SRID.RuleRedefinition, sRuleId);    // "Redefinition of rule ""%s""."
                } 
            }
            else
            {
                // Rule not yet defined.  Create a new rule and return the InitalState. 
                rule = _backend.CreateRule (sRuleId, dwAttributes);
            } 
 
            return rule;
        } 

        #endregion

        //******************************************************************* 
        //
        // Private Fields 
        // 
        //*******************************************************************
 
        #region Private Fields

        private Backend _backend;
 
        // Collection of referenced, but undefined, rules
        private List _undefRules = new List (); 
 
        // Collection of defined rules
        private List _rules = new List (); 

#if !NO_STG

        private CustomGrammar _cg; 

#endif 
 
        private string _sRoot;
 
        private bool _hasRoot;

        #endregion
    } 
}

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