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Resolving Symbolic References in a CodeDOM (Part 7)

, 2 Dec 2012 CDDL
Resolving symbolic references in a CodeDOM.
Nova.0.6.exe.zip
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Nova.CodeDOM.dll
Nova.Examples.exe
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Nova.CLI
Properties
Nova.CodeDOM
CodeDOM
Annotations
Base
Comments
Base
DocComments
CodeRef
Base
List
Name
Base
Other
Simple
CompilerDirectives
Base
Conditionals
Base
Messages
Base
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Base
Symbols
Base
Base
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Base
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Iterators
Base
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Loops
Methods
OperatorDecls
Miscellaneous
Namespaces
Properties
Base
Events
Types
Base
Variables
Base
Parsing
Base
Properties
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Resolving
Utilities
Mono.Cecil
Reflection
Nova.Examples
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Nova.Studio
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Objects.ico
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Settings.settings
Nova.Test
Properties
Nova.UI
CodeDOM
Annotations
Base
Comments
Base
DocComments
CodeRef
Base
List
Name
Base
Other
Simple
CompilerDirectives
Base
Conditionals
Base
Messages
Base
Pragmas
Base
Symbols
Base
Base
Expressions
AnonymousMethods
Base
Operators
Base
Binary
Arithmetic
Base
Assignment
Base
Bitwise
Base
Conditional
Relational
Base
Shift
Base
Other
Base
Unary
Base
Other
References
Base
GotoTargets
Base
Methods
Namespaces
Other
Properties
Types
Base
Variables
Base
Projects
Namespaces
References
Base
Statements
Base
Conditionals
Base
Exceptions
Generics
Constraints
Base
Iterators
Base
Jumps
Loops
Methods
OperatorDecls
Miscellaneous
Namespaces
Properties
Base
Events
Types
Base
Variables
Base
Properties
Resolving
Utilties
// The Nova Project by Ken Beckett.
// Copyright (C) 2007-2012 Inevitable Software, all rights reserved.
// Released under the Common Development and Distribution License, CDDL-1.0: http://opensource.org/licenses/cddl1.php

using Nova.Parsing;
using Nova.Rendering;
using Nova.Resolving;
using Nova.Utilities;

namespace Nova.CodeDOM
{
    /// <summary>
    /// The common base class of all documentation comment tags that have a 'name' attribute (<see cref="DocParam"/>,
    /// <see cref="DocParamRef"/>, <see cref="DocTypeParam"/>, <see cref="DocTypeParamRef"/>).
    /// </summary>
    public abstract class DocNameBase : DocComment
    {
        #region /* FIELDS */

        // Should evaluate to a ParameterRef (if DocParam/DocParamRef)
        // or TypeParameterRef (if DocTypeParam/DocTypeParamRef) or an UnresolvedRef.
        protected SymbolicRef _nameRef;

        #endregion

        #region /* CONSTRUCTORS */

        protected DocNameBase(SymbolicRef nameRef, string text)
            : base(text)
        {
            NameRef = nameRef;
        }

        protected DocNameBase(SymbolicRef nameRef, params DocComment[] docComments)
            : base(docComments)
        {
            NameRef = nameRef;
        }

        #endregion

        #region /* PROPERTIES */

        /// <summary>
        /// The <see cref="SymbolicRef"/> of the associated code object.
        /// </summary>
        public SymbolicRef NameRef
        {
            get { return _nameRef; }
            set { SetField(ref _nameRef, value, true); }
        }

        #endregion

        #region /* METHODS */

        /// <summary>
        /// Deep-clone the code object.
        /// </summary>
        public override CodeObject Clone()
        {
            DocNameBase clone = (DocNameBase)base.Clone();
            clone.CloneField(ref clone._nameRef, _nameRef);
            return clone;
        }

        #endregion

        #region /* PARSING */

        /// <summary>
        /// The name of the name attribute.
        /// </summary>
        public const string AttributeName = "name";

        protected DocNameBase(Parser parser, CodeObject parent)
        {
            ParseTag(parser, parent);
        }

        protected override object ParseAttributeValue(Parser parser, string name)
        {
            // Override parsing of the 'name' attribute to parse as a reference
            if (StringUtil.NNEqualsIgnoreCase(name, AttributeName))
            {
                // By default, parse a string value (including any whitespace) delimited by single or double quotes.
                // If there's no delimiter, just use the text of the token (perhaps a single word).
                string value;
                int lineNumber = parser.Token.LineNumber;
                ushort columnNumber = parser.Token.ColumnNumber;
                if (parser.TokenText == ParseTokenValueQuote1 || parser.TokenText == ParseTokenValueQuote2)
                {
                    ++columnNumber;  // Start just past the quote
                    value = parser.GetToDelimiter(parser.TokenText[0]);
                }
                else
                    value = parser.TokenText;
                parser.NextToken(true);  // Move past delimiter (or token)

                NameRef = new UnresolvedRef(value.Trim(), AttributeCategory, lineNumber, columnNumber);
                return _nameRef;
            }
            return base.ParseAttributeValue(parser, name);
        }

        protected virtual ResolveCategory AttributeCategory
        {
            get { return ResolveCategory.Expression; }
        }

        #endregion

        #region /* RESOLVING */

        /// <summary>
        /// Resolve all child symbolic references, using the specified <see cref="ResolveCategory"/> and <see cref="ResolveFlags"/>.
        /// </summary>
        public override CodeObject Resolve(ResolveCategory resolveCategory, ResolveFlags flags)
        {
            if (_nameRef != null && (flags & (ResolveFlags.Phase1 | ResolveFlags.Phase2)) == 0)
                _nameRef = (SymbolicRef)_nameRef.Resolve(AttributeCategory, flags | ResolveFlags.InDocComment);
            return base.Resolve(ResolveCategory.CodeObject, flags);
        }

        #endregion

        #region /* FORMATTING */

        /// <summary>
        /// Determines if the code object only requires a single line for display.
        /// </summary>
        public override bool IsSingleLine
        {
            get { return (base.IsSingleLine && (_nameRef == null || (!_nameRef.IsFirstOnLine && _nameRef.IsSingleLine))); }
            set
            {
                base.IsSingleLine = value;
                if (_nameRef != null)
                {
                    if (value)
                        _nameRef.IsFirstOnLine = false;
                    _nameRef.IsSingleLine = value;
                }
            }
        }

        #endregion

        #region /* RENDERING */

        protected override void AsTextStart(CodeWriter writer, RenderFlags flags)
        {
            if (!flags.HasFlag(RenderFlags.Description))
                writer.Write("<" + TagName + " " + AttributeName + "=\"");
            if (_nameRef != null)
            {
                // Turn on translation of '<', '&', and '>' for content
                writer.InDocCommentContent = true;
                _nameRef.AsText(writer, flags);
                writer.InDocCommentContent = false;
            }
            if (!flags.HasFlag(RenderFlags.Description))
                writer.Write("\"" + (_content == null && !MissingEndTag ? "/>" : ">"));
        }

        #endregion
    }
}

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This article, along with any associated source code and files, is licensed under The Common Development and Distribution License (CDDL)

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About the Author

KenBeckett
Software Developer (Senior)
United States United States
I've been writing software since the late 70's, currently focusing mainly on C#.NET. I also like to travel around the world, and I own a Chocolate Factory (sadly, none of my employees are oompa loompas).

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