/// <summary>
/// Define the given symbol on the current stack frame.
/// </summary>
/// <param name="constant_def"></param>
private void _SetConstant(Constant constant_def)
{
_env_stack.Peek().Add(constant_def.Name.ToLowerInvariant(), constant_def);
}
/// <summary>
/// XSLT extension method, called to define a text constant in the
/// preprocessor environment. The constant can be referred to symbolically
/// in subsequent definitions or expansions.
/// </summary>
/// <param name="name"></param>
/// <param name="value"></param>
public void define_text_constant(string name, string value)
{
_CheckAlreadyDefined(name);
Constant const_def = new Constant();
const_def.Name = name;
const_def.Value = value;
_SetConstant(const_def);
}
/// <summary>
/// Define the given symbol on the current stack frame.
/// </summary>
/// <param name="constant_def"></param>
private void _SetConstant(Constant constant_def )
{
_env_stack.Peek().Add( constant_def.Name.ToLowerInvariant(), constant_def );
}
/// <summary>
/// Search for the given symbol definition in the environment.
/// </summary>
/// <param name="symbol_name"></param>
/// <returns></returns>
private Constant _InternalGetSymbolDef (string symbol_name)
{
symbol_name = symbol_name.ToLowerInvariant();
// Try each stack frame.
foreach ( ConstantDict frame_defs in _env_stack.ToArray() )
{
Constant constant_def;
if ( frame_defs.TryGetValue( symbol_name, out constant_def ))
return constant_def;
}
// If nothing is found on the stack, try the system environment variables.
string env_var = Environment.GetEnvironmentVariable( symbol_name );
if ( env_var != null )
{
Constant c = new Constant();
c.Name = symbol_name;
c.Value = env_var;
return c;
}
return null;
}
/// <summary>
/// XSLT extension method, called to define a notset constant in the preprocessor
/// environment. The constant can be referred to symbolically in subsequent
/// definitions or expansions.
/// </summary>
/// <param name="name"></param>
/// <param name="value"></param>
public void define_nodeset_constant(string name, XPathNodeIterator value)
{
_CheckAlreadyDefined(name);
Constant const_def = new Constant();
const_def.Name = name;
const_def.Value = value;
_SetConstant(const_def);
}