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(*
History++ plugin for Miranda IM: the free IM client for Microsoft* Windows*
Copyright (C) 2006-2009 theMIROn, 2003-2006 Art Fedorov.
History+ parts (C) 2001 Christian Kastner
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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
{-----------------------------------------------------------------------------
hpp_mescatcher (historypp project)
Version: 1.0
Created: 09.12.2006
Author: theMIROn
[ Description ]
Hidden window, used for catching WM messages and hotkeys
[ History ]
1.0 (09.12.2006)
First version
[ Modifications ]
none
[ Known Issues ]
none
Contributors: theMIROn
-----------------------------------------------------------------------------}
unit hpp_mescatcher;
interface
{.$DEFINE USE_CUSTOMIDLEHOOK}
uses
Windows, Messages, Classes, Controls;
const
hppWindowClassName = 'History++ MainWindow';
var
hppMainWindow: HWND = 0;
procedure hppWakeMainThread(Sender: TObject);
function hppRegisterMainWindow: Boolean;
function hppUnregisterMainWindow: Boolean;
implementation
uses Forms, Themes;
{$IFDEF USE_CUSTOMIDLEHOOK}
type
THackApplication = class(TComponent)
protected
FxxxxxxxxxHandle: HWnd;
FxxxxxxxxxBiDiMode: TBiDiMode;
FxxxxxxxxxBiDiKeyboard: AnsiString;
FxxxxxxxxxNonBiDiKeyboard: AnsiString;
FxxxxxxxxxObjectInstance: Pointer;
FxxxxxxxxxMainForm: TForm;
FMouseControl: TControl;
end;
{$ENDIF}
var
SavedWakeMainThread: TNotifyEvent = nil;
SavedCheckIniChange: function (var Message: TMessage): Boolean of object = nil;
{$IFDEF USE_CUSTOMIDLEHOOK}
ForegroundIdleHook: HHOOK;
{$ENDIF}
function MainWindowWndProc(hwndDlg: HWND; uMsg: uint; wParam: WPARAM; lParam: LPARAM): lresult; stdcall;
var
Message: TMessage;
begin
Result := 0;
if Assigned(SavedCheckIniChange) then
begin
Message.Msg := uMsg;
SavedCheckIniChange(Message);
end;
case uMsg of
//WM_HOTKEY:
// place for global hotkeys :)
//if wParam = Hotkey then
// CallService(MS_HPP_SHOWGLOBALSEARCH,0,0);
CM_WINDOWHOOK: begin
if (wParam = 0) and not Assigned(SavedCheckIniChange) then
SavedCheckIniChange := TWindowHook(Pointer(LParam)^);
end;
WM_SETTINGCHANGE: begin
// workaround to force vcl notice mouse setting changed
if wParam = SPI_SETWHEELSCROLLLINES then
Mouse.SettingChanged(SPI_GETWHEELSCROLLLINES)
else
Mouse.SettingChanged(wParam);
Result := DefWindowProc(hwndDlg, uMsg, wParam, lParam);
end;
WM_FONTCHANGE: begin
Screen.ResetFonts;
Result := DefWindowProc(hwndDlg, uMsg, wParam, lParam);
end;
WM_THEMECHANGED:
StyleServices.ApplyThemeChange;
WM_NULL:
CheckSynchronize;
else
Result := DefWindowProc(hwndDlg, uMsg, wParam, lParam);
end;
end;
{$IFDEF USE_CUSTOMIDLEHOOK}
function IdleHookProc(code: Integer; wParam: WPARAM; lParam: LPARAM): Integer; stdcall;
var
Control: TControl;
MouseControl: TControl;
CaptureControl: TControl;
P: TPoint;
begin
if code < 0 then
begin
Result := CallNextHookEx(ForegroundIdleHook,code,wParam,lParam);
exit;
end;
GetCursorPos(P);
Control := FindDragTarget(P, True);
MouseControl := THackApplication(Application).FMouseControl;
CaptureControl := GetCaptureControl;
if MouseControl <> Control then
begin
if ((MouseControl <> nil) and (CaptureControl = nil)) or
((CaptureControl <> nil) and (MouseControl = CaptureControl)) then
MouseControl.Perform(CM_MOUSELEAVE, 0, 0);
MouseControl := Control;
if ((MouseControl <> nil) and (CaptureControl = nil)) or
((CaptureControl <> nil) and (MouseControl = CaptureControl)) then
MouseControl.Perform(CM_MOUSEENTER, 0, 0);
THackApplication(Application).FMouseControl := MouseControl;
end;
if Application.ShowHint and (MouseControl = nil) then
Application.CancelHint;
Result := 1;
end;
{$ENDIF}
function hppRegisterMainWindow: Boolean;
var
WndClass: TWNDCLASS;
begin
Result := False;
ZeroMemory(@WndClass,SizeOf(WndClass));
WndClass.lpfnWndProc := @MainWindowWndProc;
WndClass.hInstance := GetModuleHandle(nil);
WndClass.lpszClassName := hppWindowClassName;
if Windows.RegisterClass(WndClass) = 0 then exit;
hppMainWindow := CreateWindow(hppWindowClassName,hppWindowClassName,WS_DISABLED,
0,0,0,0,0,0,WndClass.hInstance,nil);
Result := (hppMainWindow <> 0);
if Result then
begin
// assign Application.CheckIniChange function
Application.Handle := hppMainWindow;
Application.Handle := 0;
SavedWakeMainThread := Classes.WakeMainThread;
@Classes.WakeMainThread := @hppWakeMainThread;
end;
{$IFDEF USE_CUSTOMIDLEHOOK}
ForegroundIdleHook := SetWindowsHookEx(WH_FOREGROUNDIDLE,
@IdleHookProc,0,GetCurrentThreadID);
{$ENDIF}
end;
function hppUnregisterMainWindow: Boolean;
begin
if hppMainWindow <> 0 then
begin
DestroyWindow(hppMainWindow);
hppMainWindow := 0;
end;
Result := Boolean(Windows.UnregisterClass(hppWindowClassName,GetModuleHandle(nil)));
Classes.WakeMainThread := SavedWakeMainThread;
{$IFDEF USE_CUSTOMIDLEHOOK}
if ForegroundIdleHook <> 0 then UnhookWindowsHookEx(ForegroundIdleHook);
{$ENDIF}
end;
procedure hppWakeMainThread(Sender: TObject);
begin
PostMessage(hppMainWindow, WM_NULL, 0, 0);
if Assigned(SavedWakeMainThread) then
SavedWakeMainThread(Sender);
end;
end.
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