CompiledAction.cs

Go to the documentation of this file.

using System.Xml.XPath;
 
namespace System.Xml.Xsl.XsltOld;
 
internal abstract class CompiledAction : Action
{
    internal abstract void Compile(Compiler compiler);
 
    internal virtual bool CompileAttribute(Compiler compiler)
    {
        return false;
    }
 
    public void CompileAttributes(Compiler compiler)
    {
        NavigatorInput input = compiler.Input;
        string localName = input.LocalName;
        if (!input.MoveToFirstAttribute())
        {
            return;
        }
        do
        {
            if (input.NamespaceURI.Length != 0)
            {
                continue;
            }
            try
            {
                if (!CompileAttribute(compiler))
                {
                    throw XsltException.Create(System.SR.Xslt_InvalidAttribute, input.LocalName, localName);
                }
            }
            catch
            {
                if (!compiler.ForwardCompatibility)
                {
                    throw;
                }
            }
        }
        while (input.MoveToNextAttribute());
        input.ToParent();
    }
 
    internal static string PrecalculateAvt(ref Avt avt)
    {
        string result = null;
        if (avt != null && avt.IsConstant)
        {
            result = avt.Evaluate(null, null);
            avt = null;
        }
        return result;
    }
 
    public void CheckEmpty(Compiler compiler)
    {
        string name = compiler.Input.Name;
        if (!compiler.Recurse())
        {
            return;
        }
        do
        {
            XPathNodeType nodeType = compiler.Input.NodeType;
            if (nodeType != XPathNodeType.Whitespace && nodeType != XPathNodeType.Comment && nodeType != XPathNodeType.ProcessingInstruction)
            {
                throw XsltException.Create(System.SR.Xslt_NotEmptyContents, name);
            }
        }
        while (compiler.Advance());
        compiler.ToParent();
    }
 
    public void CheckRequiredAttribute(Compiler compiler, object attrValue, string attrName)
    {
        CheckRequiredAttribute(compiler, attrValue != null, attrName);
    }
 
    public void CheckRequiredAttribute(Compiler compiler, bool attr, string attrName)
    {
        if (!attr)
        {
            throw XsltException.Create(System.SR.Xslt_MissingAttribute, attrName);
        }
    }
}