/// <summary>
/// Enforces the RMPolicy by walking through the PolicyBinding and setting the
/// IsBlockedByRM property on the associated Commands as appropriate.
/// </summary>
/// <param name="policyToEnforce"></param>
internal void Enforce()
{
Invariant.Assert(
_docViewer != null,
"CommandEnforcer has no reference to the parent DocumentApplicationDocumentViewer.");
// Get the current policy from the parent DocumentApplicationDocumentViewer
RightsManagementPolicy policyToEnforce = _docViewer.RightsManagementPolicy;
// Walk through the list of bindings
foreach (PolicyBinding binding in _bindings)
{
// If the incoming policy allows this action, and it completely masks our binding policy,
// then we set the IsBlockedByRM property to false, as this Command is permitted.
binding.Command.IsBlockedByRM = !((policyToEnforce & binding.Policy) == binding.Policy);
}
// Enforce PrintScreen
// This will disable PrintScreen if neither AllowCopy or AllowPrint
// permission is granted.
bool disablePrintScreen = !(((policyToEnforce & RightsManagementPolicy.AllowCopy)
== RightsManagementPolicy.AllowCopy) ||
((policyToEnforce & RightsManagementPolicy.AllowPrint)
== RightsManagementPolicy.AllowPrint));
DisablePrintScreen(disablePrintScreen);
}
/// <summary>
/// Constructor for a PolicyBinding.
/// </summary>
/// <param name="command">The Command to bind the permission to.</param>
/// <param name="policy">The RMPolicy to be bound to the above Command.</param>
public PolicyBinding(RoutedUICommand command, RightsManagementPolicy policy)
{
if (command == null)
{
throw new ArgumentNullException("command");
}
_command = command;
_policy = policy;
}
