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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.
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