/*++

Copyright (c) 1985 - 1999, Microsoft Corporation

Module Name:

    imewndhd.h

Abstract:

    This file defines the IME window handler Class.

Author:

Revision History:

Notes:

--*/

#ifndef _IMEWNDHD_H_
#define _IMEWNDHD_H_

#include "ctxtlist.h"
#include "globals.h"

extern LPCTSTR IMEWndHandlerName;

class CIMEWindowHandler
{
public:
    CIMEWindowHandler(HWND hwnd = NULL, BOOL fDefault = FALSE);
    ~CIMEWindowHandler();

    LRESULT ImeWndCreateHandler(DWORD style, HIMC hDefIMC);
    LRESULT ImeWndCreateHandler(LPCREATESTRUCT lpcs);

    HIMC ImeGetImc()
    {
        return m_imeui.hIMC;
    }

    VOID ImeSetWnd(HWND hwnd)
    {
        m_imeui.hImeWnd = hwnd;
    }

    LRESULT ImeWndProcWorker(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode = TRUE);

private:
    LRESULT _ImeWndProcWorker(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);

public:
    VOID    ImeWndFinalDestroyHandler();

private:
    VOID    ImeWndDestroyHandler();
    LRESULT ImeSystemHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);
    LRESULT ImeSelectHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);
    LRESULT ImeControlHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);
    LRESULT ImeSetContextHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);
    LRESULT ImeNotifyHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);
    LRESULT ImeMsImeHandler(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);

    LRESULT SendMessageToUI(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode, CActiveIMM* pActiveIMM);

    LRESULT ImeActivateLayout(HKL hSelKL, CActiveIMM* pActiveIMM);
    VOID ImeSetImc(HIMC hIMC, CActiveIMM* pActiveIMM);

    VOID ImeMarkUsedContext(HWND hImeWnd, HIMC hIMC, CActiveIMM* pActiveIMM);
    BOOL ImeIsUsableContext(HWND hImeWnd, HIMC hIMC, CActiveIMM* pActiveIMM);
    BOOL ImeBroadCastMsg(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL fUnicode);

    int IsIMEHandler()
    {
        return (m_imeui.nCntInIMEProc);
    }

    BOOL IsMsImeMessage(UINT uMsg)
    {
        if (uMsg == WM_MSIME_SERVICE ||
            uMsg == WM_MSIME_UIREADY ||
            uMsg == WM_MSIME_RECONVERTREQUEST ||
            uMsg == WM_MSIME_RECONVERT ||
            uMsg == WM_MSIME_DOCUMENTFEED ||
            uMsg == WM_MSIME_QUERYPOSITION ||
            uMsg == WM_MSIME_MODEBIAS ||
            uMsg == WM_MSIME_SHOWIMEPAD ||
            uMsg == WM_MSIME_MOUSE ||
            uMsg == WM_MSIME_KEYMAP)
            return TRUE;
        else
            return FALSE;
    }

    //
    // Enumrate callbacks
    //
    static ENUM_RET EnumInputContextCallback(HIMC hIMC,
                                             CContextList* pList);

private:
    typedef struct tagIMEUI {
        HWND  hImeWnd;
        HIMC  hIMC;
        LONG  nCntInIMEProc;   // Non-zero if hwnd has called into ImeWndProc.
        BOOL  fDefault:1;      // TRUE if this is the default IME.
    } IMEUI;
    IMEUI     m_imeui;

    HKL   m_hKL_UnSelect;      // Use in ImeActivateLayout() for unselect hKL value.
};



CIMEWindowHandler* GetImeWndHandler(HWND hwnd, BOOL fDefault = FALSE);


#endif // _IMEWNDHD_H_