/// <summary>Re-initializes internal state to be ready for re-use.</summary>
public void Reset()
{
// some declarations may be pending in nextScope
nextScope.ClearMappings();
// store active scopes for re-use
NamespaceScope scope = topScope;
if (scope != null)
{
// need to reset active scopes before storing them for re-use
scope.ClearMappings();
while (scope.parent != null)
{
scope = scope.parent;
scope.ClearMappings();
}
// attach free scopes to end of active scopes
scope.parent = nextScope;
// move the whole stack from topScope to nextScope
nextScope = topScope;
topScope = null;
}
// the 'xml' prefix is always declared
nextScope.AddMapping("xml", Constants.XmlUri);
}
/// <summary>Deactivates namespace scope.</summary>
/// <remarks>All namespace mappings that became active with this scope
/// are going out of effect.</remarks>
public void PopScope()
{
if (nextScope.emptyLevels > 0)
{
nextScope.emptyLevels--;
}
else if (topScope == null) // don't pop too many times
{
string msg = Resources.GetString(RsId.NoActiveNsScope);
throw new InvalidOperationException(msg);
}
else
{
NamespaceScope oldNextScope = nextScope;
// clear pending declarations
oldNextScope.ClearMappings();
nextScope = topScope;
topScope = topScope.parent;
nextScope.parent = oldNextScope;
nextScope.ClearMappings();
}
}
/// <summary>Deactivates namespace scope.</summary>
/// <remarks>All namespace mappings that became active with this scope
/// are going out of effect.</remarks>
public void PopScope()
{
if (nextScope.emptyLevels > 0)
nextScope.emptyLevels--;
else if (topScope == null) { // don't pop too many times
string msg = Resources.GetString(RsId.NoActiveNsScope);
throw new InvalidOperationException(msg);
}
else {
NamespaceScope oldNextScope = nextScope;
// clear pending declarations
oldNextScope.ClearMappings();
nextScope = topScope;
topScope = topScope.parent;
nextScope.parent = oldNextScope;
nextScope.ClearMappings();
}
}
