// --------------------------------------------------------------------------------------------
/// <summary>
/// Retrieves the CommandTargetInfo belonging to the target type.
/// </summary>
// --------------------------------------------------------------------------------------------
private CommandTargetInfo GetTargetInfo()
{
CommandTargetInfo targetInfo;
if (!_Targets.TryGetValue(EventTarget.GetType(), out targetInfo))
{
throw new InvalidOperationException(
(String.Format(Resources.CommandDispatcher_NoType, EventTarget.GetType())));
}
return(targetInfo);
}
// --------------------------------------------------------------------------------------------
/// <summary>
/// Scans through all the methods of the EventTarget's type to collect information about
/// command handler methods.
/// </summary>
// --------------------------------------------------------------------------------------------
private void ScanDispatchInfo()
{
Type targetType = EventTarget.GetType();
lock (_Targets)
{
// --- We scan only the type info, if we have not scanned it yet.
if (_Targets.ContainsKey(targetType))
{
return;
}
var target = new CommandTargetInfo();
// --- Obtain the default command Guid for the event target
var defaultGuidAttr = targetType.GetAttribute <DefaultCommandGroupAttribute>();
Guid defaultGuid = defaultGuidAttr == null
? (GuidProvider == null ? targetType.GUID : GuidProvider.CommandGuid)
: defaultGuidAttr.Value.GUID;
target.DefaultGuid = defaultGuid;
// --- Obtain command mapping information
var mappings = targetType.AttributesOfType <CommandMapAttribute>();
foreach (var attr in mappings)
{
target.Mappings.Add(attr);
}
// --- Obtain all methods that can be used as command methods
var commandMethods =
from method in targetType.GetMethods(BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Instance | BindingFlags.Static)
where method.ReturnType == typeof(void) &&
(
// --- void MyCommandExec()
method.GetParameters().Count() == 0 &&
Attribute.IsDefined(method, typeof(CommandExecMethodAttribute))
||
// --- void MyCommandExec(CommandContext)
method.GetParameters().Count() == 1 &&
(
method.GetParameters()[0].ParameterType == typeof(CommandContext) ||
method.GetParameters()[0].ParameterType.IsSubclassOf(typeof(CommandContext))
) &&
Attribute.IsDefined(method, typeof(CommandExecMethodAttribute))
||
// --- void MyCommandMethod(OleMenuCommand)
method.GetParameters().Count() == 1 &&
method.GetParameters()[0].ParameterType == typeof(OleMenuCommand) &&
Attribute.IsDefined(method, typeof(CommandMethodAttribute))
||
// --- void MyCommandMethod(OleMenuCommand, CommandExec)
method.GetParameters().Count() == 2 &&
method.GetParameters()[0].ParameterType == typeof(OleMenuCommand) &&
(
method.GetParameters()[1].ParameterType == typeof(CommandContext) ||
method.GetParameters()[1].ParameterType.IsSubclassOf(typeof(CommandContext))
) &&
Attribute.IsDefined(method, typeof(CommandMethodAttribute))
) &&
Attribute.IsDefined(method, typeof(CommandIdAttribute))
select method;
foreach (var method in commandMethods)
{
foreach (CommandIdAttribute idAttr in
method.GetCustomAttributes(typeof(CommandIdAttribute), false))
{
var menuInfo = ObtainCommandMethodAttributes(idAttr, method, defaultGuid);
MergeCommandMethodInfo(target, menuInfo);
}
}
_Targets.Add(targetType, target);
}
}