//------------------------------------------------------------------------------
// <copyright file="AttributeSetAction.cs" company="Microsoft">
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>                                                                
// <owner current="true" primary="true">Microsoft</owner>
//------------------------------------------------------------------------------

namespace System.Xml.Xsl.XsltOld {
    using Res = System.Xml.Utils.Res;
    using System;
    using System.Diagnostics;
    using System.Xml;
    using System.Xml.XPath;
    using System.Collections;

    internal class AttributeSetAction : ContainerAction {
        internal XmlQualifiedName            name;

        internal XmlQualifiedName Name {
            get { return this.name; }
        }

        internal override void Compile(Compiler compiler) {
            CompileAttributes(compiler);
            CheckRequiredAttribute(compiler, this.name, "name");
            CompileContent(compiler);
        }

        internal override bool CompileAttribute(Compiler compiler) {
            string name   = compiler.Input.LocalName;
            string value  = compiler.Input.Value;
            if (Ref.Equal(name, compiler.Atoms.Name)) {
                Debug.Assert(this.name == null);
                this.name = compiler.CreateXPathQName(value);
            }
            else if (Ref.Equal(name, compiler.Atoms.UseAttributeSets)) {
                // create a UseAttributeSetsAction
                // sets come before xsl:attributes
                AddAction(compiler.CreateUseAttributeSetsAction());
            }
            else {
                return false;
            }

            return true;
        }

        private void CompileContent(Compiler compiler) {
            NavigatorInput input = compiler.Input;

            if (compiler.Recurse()) {
                do {
                    switch(input.NodeType) {
                    case XPathNodeType.Element:
                        compiler.PushNamespaceScope();

                        string nspace = input.NamespaceURI;
                        string name   = input.LocalName;

                        if (Ref.Equal(nspace, input.Atoms.UriXsl) && Ref.Equal(name, input.Atoms.Attribute)) {
                            // found attribute so add it
                            AddAction(compiler.CreateAttributeAction());
                        }
                        else {
                            throw compiler.UnexpectedKeyword();
                        }
                        compiler.PopScope();
                        break;

                    case XPathNodeType.Comment:
                    case XPathNodeType.ProcessingInstruction:
                    case XPathNodeType.Whitespace:
                    case XPathNodeType.SignificantWhitespace:
                        break;

                    default:
                        throw XsltException.Create(Res.Xslt_InvalidContents, "attribute-set");
                    }
                }
                while(compiler.Advance());

                compiler.ToParent();
            }
        }

        internal void Merge(AttributeSetAction attributeAction) {
            // add the contents of "attributeAction" to this action
            // place them at the end
            Action  action;
            int     i = 0;

            while((action = attributeAction.GetAction(i)) != null) {
                AddAction(action);
                i++;
            }
        }
    }
}