base/applications/kbswitch/kbsdll/kbsdll.c

   1 /*
   2  * PROJECT:         ReactOS Keyboard Layout Switcher
   3  * FILE:            kbswitch/kbsdll/kbsdll.c
   4  * PROGRAMMER:      Dmitry Chapyshev <dmitry@reactos.org>
   5  *
   6  */
   7
   8 #include "../kbswitch.h"
   9
  10 HHOOK hKeyboardHook, hLangHook, hWinHook;
  11 HINSTANCE hInstance;
  12 HWND hKbSwitchWnd;
  13
  14 static VOID
  15 SendMessageToMainWnd(UINT Msg, WPARAM wParam, LPARAM lParam)
  16 {
  17     PostMessage(hKbSwitchWnd, Msg, wParam, lParam);
  18 }
  19
  20 /* Not used yet */
  21 LRESULT CALLBACK
  22 KeyboardHookProc(int code, WPARAM wParam, LPARAM lParam)
  23 {
  24     return CallNextHookEx(hKeyboardHook, code, wParam, lParam);
  25 }
  26
  27 LRESULT CALLBACK
  28 LangHookProc(int code, WPARAM wParam, LPARAM lParam)
  29 {
  30     PMSG msg;
  31     msg = (PMSG) lParam;
  32
  33     switch (msg->message)
  34     {
  35         case WM_INPUTLANGCHANGEREQUEST:
  36         {
  37             SendMessageToMainWnd(WM_LANG_CHANGED, wParam, msg->lParam);
  38         }
  39         break;
  40
  41         case WM_HOTKEY:
  42         {
  43             if (msg->hwnd)
  44             {
  45                 SendMessageToMainWnd(WM_LOAD_LAYOUT, (WPARAM)msg->hwnd, msg->lParam);
  46             }
  47         }
  48         break;
  49     }
  50
  51     return CallNextHookEx(hLangHook, code, wParam, lParam);
  52 }
  53
  54 LRESULT CALLBACK
  55 WinHookProc(int code, WPARAM wParam, LPARAM lParam)
  56 {
  57     int id = GlobalAddAtom(_T("KBSWITCH"));
  58
  59     switch (code)
  60     {
  61         case HCBT_SETFOCUS:
  62         {
  63             if ((HWND)wParam != NULL)
  64             {
  65                 if ((HWND)wParam != hKbSwitchWnd)
  66                 {
  67                     SendMessageToMainWnd(WM_WINDOW_ACTIVATE, wParam, lParam);
  68                 }
  69             }
  70         }
  71         break;
  72
  73         case HCBT_CREATEWND:
  74         {
  75             RegisterHotKey((HWND)wParam, id, MOD_ALT, VK_F10);
  76         }
  77         break;
  78
  79         case HCBT_DESTROYWND:
  80         {
  81             UnregisterHotKey((HWND)wParam, id);
  82         }
  83         break;
  84     }
  85
  86     GlobalDeleteAtom(id);
  87
  88     return CallNextHookEx(hWinHook, code, wParam, lParam);
  89 }
  90
  91 BOOL WINAPI
  92 KbSwitchSetHooks(VOID)
  93 {
  94     hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardHookProc, hInstance, 0);
  95     hLangHook = SetWindowsHookEx(WH_GETMESSAGE, LangHookProc, hInstance, 0);
  96     hWinHook = SetWindowsHookEx(WH_CBT, WinHookProc, hInstance, 0);
  97
  98     if ((hKeyboardHook)&&(hLangHook)&&(hWinHook))
  99         return TRUE;
 100     else
 101         return FALSE;
 102 }
 103
 104 VOID WINAPI
 105 KbSwitchDeleteHooks(VOID)
 106 {
 107     if (hKeyboardHook) UnhookWindowsHookEx(hKeyboardHook);
 108     if (hLangHook) UnhookWindowsHookEx(hLangHook);
 109     if (hWinHook) UnhookWindowsHookEx(hWinHook);
 110 }
 111
 112 BOOL WINAPI
 113 DllMain(IN HINSTANCE hinstDLL,
 114         IN DWORD dwReason,
 115         IN LPVOID lpvReserved)
 116 {
 117     switch (dwReason)
 118     {
 119         case DLL_PROCESS_ATTACH:
 120             hInstance = hinstDLL;
 121             hKbSwitchWnd = FindWindow(szKbSwitcherName, NULL);
 122             if (!hKbSwitchWnd) return FALSE;
 123             break;
 124     }
 125
 126     return TRUE;
 127 }