1 files changed, 174 insertions, 0 deletions
diff --git a/ServiceBasedPlugins/src/pluginsupport/UPluginManager.pas b/ServiceBasedPlugins/src/pluginsupport/UPluginManager.pas
new file mode 100644
index 00000000..6c7f5056
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+++ b/ServiceBasedPlugins/src/pluginsupport/UPluginManager.pas
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+{* UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * $URL: https://ultrastardx.svn.sourceforge.net/svnroot/ultrastardx/trunk/src/base/UMain.pas $
+ * $Id: UMain.pas 1629 2009-03-07 22:30:04Z k-m_schindler $
+ *}
+unit UPluginManager;
+
+{ this class manages all loaded plugins }
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses Classes, UPluginDefines;
+
+type
+  TPluginManager = class
+    private
+      NextHandle: TUS_Handle;
+
+      Plugins: TInterfaceList;
+      Events: TInterfaceList;
+      Interfaces: TInterfaceList;
+
+    public
+      constructor Create;
+
+      //returns a unique handle to use e.g. w/ a pluginloader
+      function GetHandle: TUS_Handle;
+
+      //returns the plugin w/ the specified handle
+      function GetPluginbyHandle(Handle: TUS_Handle): IUS_Plugin;
+
+      //just adds a plugin to the pluginlist
+      //it will be inited on next call of init
+      function AddPlugin(Plugin: IInterface): TUS_Handle;
+
+      procedure Init;   //< inits all plugins w/ status psWaitingInit
+      procedure DeInit; //< deinits all plugins w/ status psInited
+
+      //called by plugins if they change to status psError
+      //removes all saved data and callbacks by this handle
+      procedure ReportError(Handle: TUS_Handle);
+
+      destructor Destroy;
+  end;
+
+var
+  PluginManager: TPluginManager;
+
+implementation
+uses SysUtils;
+
+constructor TPluginManager.Create;
+begin
+  NextHandle := US_HANDLE_CORE + 1;
+
+  Plugins := TInterfaceList.Create;
+  Events := TInterfaceList.Create;
+  Interfaces := TInterfaceList.Create;
+end;
+
+destructor TPluginManager.Destroy;
+begin
+  DeInit;
+
+  Plugins.Destroy;
+  Events.Destroy;
+  Interfaces.Destroy;
+end;
+
+// returns a unique handle to use e.g. w/ a pluginloader
+function TPluginManager.GetHandle: TUS_Handle;
+begin
+  Result := NextHandle;
+  Inc(NextHandle);
+end;
+
+//returns the plugin w/ the specified handle
+function TPluginManager.GetPluginbyHandle(Handle: TUS_Handle): IUS_Plugin; 
+  var
+    I: integer;
+    Plugin: IUS_Plugin;
+begin
+  Result := nil;
+  for I := 0 to Plugins.Count-1 do
+  begin
+    Plugin := IUS_Plugin(Plugins.Items[I]);
+    If (Plugin.GetHandle = Handle) then
+    begin
+      Result := Plugin;
+      Exit;
+    end;
+  end;
+end;
+
+// just adds a plugin to the pluginlist
+// it will be inited on next call of init
+function TPluginManager.AddPlugin(Plugin: IInterface): TUS_Handle;
+begin
+  If Supports(Plugin, IUS_Plugin) then
+    Plugins.Add(Plugin);
+end;
+
+// inits all plugins w/ status psWaitingInit
+procedure TPluginManager.Init;
+  var
+    I: integer;
+    Plugin: IUS_Plugin;
+begin
+  for I := 0 to Plugins.Count-1 do
+  begin
+    Plugin := IUS_Plugin(Plugins.Items[I]);
+    If (Plugin.GetStatus = psWaitingInit) then
+    begin
+      Plugin.Init;
+    end;
+  end;
+end;
+
+// deinits all plugins w/ status psInited
+procedure TPluginManager.DeInit;
+  var
+    I: integer;
+    Plugin: IUS_Plugin;
+begin
+  for I := 0 to Plugins.Count-1 do
+  begin
+    Plugin := IUS_Plugin(Plugins.Items[I]);
+    If (Plugin.GetStatus = psInited) then
+    begin
+      Plugin.DeInit;
+    end;
+  end;
+end;
+
+//called by plugins if they change to errorstate
+//removes all saved data and callbacks by this handle
+procedure TPluginManager.ReportError(Handle: TUS_Handle);
+  var
+    I: integer;
+    Event: IUS_HookableEvent;
+begin
+  for I := 0 to Events.Count-1 do
+  begin
+    Event := IUS_HookableEvent(Events.Items[I]);
+    Event.UnHookbyParent(Handle);
+  end;
+end;
+
+end.
+\ No newline at end of file