public ProxyCommand(ModuleManager manager, Guid id, ModuleCommandAttribute attribute, EventHandler<ModuleCommandEventArgs> handler)
: base(manager, id, (attribute == null ? null : (ModuleCommandAttribute)attribute.Clone()))
{
_Handler = handler;
Init();
}
internal ProxyCommand(ModuleManager manager, EnumerableReader reader)
: base(manager, reader, new ModuleCommandAttribute())
{
Attribute.Prefix = (string)reader.Read();
Init();
}
protected ProxyAction(ModuleManager manager, Type classType, Type attributeType)
{
if (classType == null) throw new ArgumentNullException("classType");
if (attributeType == null) throw new ArgumentNullException("attributeType");
_Manager = manager;
_ClassType = classType;
object[] attrs;
// Guid attribute; get it this way, not as Type.GUID, to be sure the attribute is applied
attrs = _ClassType.GetCustomAttributes(typeof(GuidAttribute), false);
if (attrs.Length == 0)
throw new ModuleException(string.Format(null, "Apply the Guid attribute to the '{0}' class.", _ClassType.Name));
_Id = new Guid(((GuidAttribute)attrs[0]).Value);
// Module* attribure
attrs = _ClassType.GetCustomAttributes(attributeType, false);
if (attrs.Length == 0)
throw new ModuleException(string.Format(null, "Apply the '{0}' attribute to the '{1}' class.", attributeType.Name, _ClassType.Name));
_Attribute = (ModuleActionAttribute)attrs[0];
Initialize();
if (_Attribute.Resources)
{
_Manager.CachedResources = true;
string name = _Manager.GetString(_Attribute.Name);
if (!string.IsNullOrEmpty(name))
_Attribute.Name = name;
}
}
internal ProxyEditor(ModuleManager manager, EnumerableReader reader)
: base(manager, reader, new ModuleEditorAttribute())
{
Attribute.Mask = (string)reader.Read();
Init();
}
internal ProxyDrawer(ModuleManager manager, EnumerableReader reader)
: base(manager, reader, new ModuleDrawerAttribute())
{
Attribute.Mask = (string)reader.Read();
Attribute.Priority = (int)reader.Read();
Init();
}
protected ProxyAction(ModuleManager manager, Guid id, ModuleActionAttribute attribute)
{
_Manager = manager;
_Id = id;
_Attribute = attribute;
Initialize();
}
protected ProxyAction(ModuleManager manager, EnumerableReader reader, ModuleActionAttribute attribute)
{
if (reader == null)
throw new ArgumentNullException("reader");
_Manager = manager;
_Attribute = attribute;
_ClassName = (string)reader.Read();
_Attribute.Name = (string)reader.Read();
_Id = (Guid)reader.Read();
}
internal ProxyCommand(ModuleManager manager, Type classType)
: base(manager, classType, typeof(ModuleCommandAttribute))
{
Init();
}
internal ProxyDrawer(ModuleManager manager, Type classType)
: base(manager, classType, typeof(ModuleDrawerAttribute))
{
Init();
}
internal ProxyTool(ModuleManager manager, Guid id, ModuleToolAttribute attribute, EventHandler<ModuleToolEventArgs> handler)
: base(manager, id, (ModuleToolAttribute)attribute.Clone())
{
_Handler = handler;
}
/// <summary>
/// Loads the module item by type.
/// </summary>
static int LoadType(ModuleManager manager, Hashtable settings, Type type)
{
Log.Source.TraceInformation("Load class {0}", type);
// case: host
if (typeof(ModuleHost).IsAssignableFrom(type))
{
manager.SetModuleHost(type);
return 0;
}
// case: settings
if (typeof(ApplicationSettingsBase).IsAssignableFrom(type))
{
manager.HasSettings = true;
return 0;
}
// command
ProxyAction action;
if (typeof(ModuleCommand).IsAssignableFrom(type))
{
var it = new ProxyCommand(manager, type);
Host.Instance.RegisterProxyCommand(it);
action = it;
}
// tool
else if (typeof(ModuleTool).IsAssignableFrom(type))
{
var it = new ProxyTool(manager, type);
Host.Instance.RegisterProxyTool(it);
action = it;
}
// editor
else if (typeof(ModuleEditor).IsAssignableFrom(type))
{
var it = new ProxyEditor(manager, type);
Host.Instance.RegisterProxyEditor(it);
action = it;
}
// drawer
else if (typeof(ModuleDrawer).IsAssignableFrom(type))
{
var it = new ProxyDrawer(manager, type);
Host.Instance.RegisterProxyDrawer(it);
action = it;
}
else throw new ModuleException("Unknown module class type.");
// set settings
action.LoadData((Hashtable)settings[action.Id]);
return 1;
}
internal ProxyTool(ModuleManager manager, EnumerableReader reader)
: base(manager, reader, new ModuleToolAttribute())
{
Attribute.Options = (ModuleToolOptions)reader.Read();
}
/// <summary>
/// Saves the module cache.
/// </summary>
void SaveModuleCache(ModuleManager manager, FileInfo fileInfo)
{
Log.Source.TraceInformation("Save cache {0}", fileInfo);
var data = new ArrayList();
// << Stamp
data.Add(fileInfo.LastWriteTime.Ticks);
// << Culture
if (manager.CachedResources)
data.Add(manager.CurrentUICulture.Name);
else
data.Add(string.Empty);
// << Settings
data.Add(manager.HasSettings);
// << Host
string hostClassName = manager.GetModuleHostClassName();
if (hostClassName != null)
{
// Type
data.Add((int)ModuleItemKind.Host);
// Class
data.Add(hostClassName);
}
// << Actions
foreach (ProxyAction it in Host.Actions.Values)
if (it.Manager == manager)
it.WriteCache(data);
// to write
_Cache.Set(manager.AssemblyPath, data);
}
/// <summary>
/// Reads the module from the cache.
/// </summary>
/// <param name="fileInfo">Module file information.</param>
/// <returns>True if the module has been loaded from the cache.</returns>
bool ReadCache(FileInfo fileInfo)
{
Log.Source.TraceInformation("Read cache {0}", fileInfo);
string path = fileInfo.FullName;
var data = _Cache.Get(path);
if (data == null)
return false;
++_Cache.CountLoaded;
bool done = false;
ModuleManager manager = null;
try
{
// read data
EnumerableReader reader = new EnumerableReader((IEnumerable)data);
// >> Stamp
var assemblyStamp = (long)reader.Read();
if (assemblyStamp != fileInfo.LastWriteTime.Ticks)
return false;
// new manager, add it now, remove later on errors
manager = new ModuleManager(path);
_Managers.Add(manager.ModuleName, manager);
// read and load data
var settings = manager.ReadSettings();
manager.LoadData(settings);
// >> Culture of cached resources
var savedCulture = (string)reader.Read();
// check the culture
if (savedCulture.Length > 0)
{
// the culture changed, ignore the cache
if (savedCulture != manager.CurrentUICulture.Name)
return false;
// restore the flag
manager.CachedResources = true;
}
// >> Settings
manager.HasSettings = (bool)reader.Read();
object kind;
while (null != (kind = reader.TryRead()))
{
ProxyAction action = null;
switch ((ModuleItemKind)kind)
{
case ModuleItemKind.Host:
{
manager.SetModuleHost((string)reader.Read());
}
break;
case ModuleItemKind.Command:
{
var it = new ProxyCommand(manager, reader);
Host.Instance.RegisterProxyCommand(it);
action = it;
}
break;
case ModuleItemKind.Editor:
{
var it = new ProxyEditor(manager, reader);
Host.Instance.RegisterProxyEditor(it);
action = it;
}
break;
case ModuleItemKind.Drawer:
{
var it = new ProxyDrawer(manager, reader);
Host.Instance.RegisterProxyDrawer(it);
action = it;
}
break;
case ModuleItemKind.Tool:
{
var it = new ProxyTool(manager, reader);
Host.Instance.RegisterProxyTool(it);
action = it;
}
break;
default:
throw new ModuleException();
}
if (action != null)
action.LoadData((Hashtable)settings[action.Id]);
}
done = true;
}
catch (ModuleException)
{
// ignore known
}
catch (Exception ex)
{
throw new ModuleException(string.Format(null, "Error on reading the cache for '{0}'.", path), ex);
}
finally
{
if (!done)
{
// remove cached data
_Cache.Remove(path);
// remove the manager
if (manager != null)
RemoveModuleManager(manager);
}
}
return done;
}
/// <summary>
/// Loads the module assembly.
/// </summary>
/// <param name="fileName">The assembly path to load a module from.</param>
void LoadModule(string fileName)
{
Log.Source.TraceInformation("Load module {0}", fileName);
// use the file info to reduce file access
var fileInfo = new FileInfo(fileName);
if (!fileInfo.Exists)
{
Log.Source.TraceInformation("Module is not found.");
return;
}
// load from the cache
if (ReadCache(fileInfo))
return;
// add new module manager now, it will be removed on errors
ModuleManager manager = new ModuleManager(fileInfo.FullName);
_Managers.Add(manager.ModuleName, manager);
// read and load data
var settings = manager.ReadSettings();
manager.LoadData(settings);
bool done = false;
try
{
Log.Source.TraceInformation("Load module {0}", manager.ModuleName);
int actionCount = 0;
Assembly assembly = manager.LoadAssembly();
foreach (Type type in assembly.GetExportedTypes())
{
if (typeof(BaseModuleItem).IsAssignableFrom(type) && !type.IsAbstract)
actionCount += LoadType(manager, settings, type);
else if (!manager.HasSettings && typeof(ApplicationSettingsBase).IsAssignableFrom(type) && !type.IsAbstract)
manager.HasSettings = true;
}
// if the module has the host to load then load it now, if it is not loaded then the module should be cached
if (!manager.LoadLoadableModuleHost())
{
if (0 == actionCount)
throw new ModuleException("A module must have a public action or a pre-loadable host.");
SaveModuleCache(manager, fileInfo);
}
// done
done = true;
}
finally
{
if (!done)
RemoveModuleManager(manager);
}
}
internal ProxyTool(ModuleManager manager, Type classType)
: base(manager, classType, typeof(ModuleToolAttribute))
{
}
internal ProxyEditor(ModuleManager manager, Type classType)
: base(manager, classType, typeof(ModuleEditorAttribute))
{
Init();
}
//! Don't use Far UI
internal static void RemoveModuleManager(ModuleManager manager)
{
// remove the module
_Managers.Remove(manager.ModuleName);
// 1) gather its actions
var actions = new List<ProxyAction>();
foreach (ProxyAction action in Host.Actions.Values)
if (action.Manager == manager)
actions.Add(action);
// 2) unregister its actions
foreach (ProxyAction action in actions)
action.Unregister();
}
