ValueOfAction.cs

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namespace System.Xml.Xsl.XsltOld;
 
internal class ValueOfAction : CompiledAction
{
    private int _selectKey = -1;
 
    private bool _disableOutputEscaping;
 
    private static readonly Action s_BuiltInRule = new BuiltInRuleTextAction();
 
    internal static Action BuiltInRule()
    {
        return s_BuiltInRule;
    }
 
    internal override void Compile(Compiler compiler)
    {
        CompileAttributes(compiler);
        CheckRequiredAttribute(compiler, _selectKey != -1, "select");
        CheckEmpty(compiler);
    }
 
    internal override bool CompileAttribute(Compiler compiler)
    {
        string localName = compiler.Input.LocalName;
        string value = compiler.Input.Value;
        if (Ref.Equal(localName, compiler.Atoms.Select))
        {
            _selectKey = compiler.AddQuery(value);
        }
        else
        {
            if (!Ref.Equal(localName, compiler.Atoms.DisableOutputEscaping))
            {
                return false;
            }
            _disableOutputEscaping = compiler.GetYesNo(value);
        }
        return true;
    }
 
    internal override void Execute(Processor processor, ActionFrame frame)
    {
        switch (frame.State)
        {
        case 0:
        {
            string text = processor.ValueOf(frame, _selectKey);
            if (processor.TextEvent(text, _disableOutputEscaping))
            {
                frame.Finished();
                break;
            }
            frame.StoredOutput = text;
            frame.State = 2;
            break;
        }
        case 2:
            processor.TextEvent(frame.StoredOutput);
            frame.Finished();
            break;
        }
    }
}