/*
 * ComboBoxEx control
 *
 * Copyright 1998, 1999 Eric Kohl
 *
 * NOTES
 *   This is just a dummy control. An author is needed! Any volunteers?
 *   I will only improve this control once in a while.
 *     Eric <ekohl@abo.rhein-zeitung.de>
 *
 * TODO:
 *   - All messages.
 *   - All notifications.
 *
 * FIXME:
 *   - should include "combo.h" 
 */

#include "winbase.h"
#include "commctrl.h"
#include "debugtools.h"

DEFAULT_DEBUG_CHANNEL(comboex);

typedef struct
{
    HIMAGELIST himl;
    HWND     hwndCombo;
    DWORD      dwExtStyle;
} COMBOEX_INFO;

#define ID_CB_EDIT    1001

#define COMBOEX_GetInfoPtr(wndPtr) ((COMBOEX_INFO *)GetWindowLongA (hwnd, 0))


/* << COMBOEX_DeleteItem >> */


inline static LRESULT
COMBOEX_GetComboControl (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);

    TRACE("\n");

    return (LRESULT)infoPtr->hwndCombo;
}


inline static LRESULT
COMBOEX_GetEditControl (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);

    if ((GetWindowLongA (hwnd, GWL_STYLE) & CBS_DROPDOWNLIST) != CBS_DROPDOWN)
	return 0;

    TRACE("-- 0x%x\n", GetDlgItem (infoPtr->hwndCombo, ID_CB_EDIT));

    return (LRESULT)GetDlgItem (infoPtr->hwndCombo, ID_CB_EDIT);
}


inline static LRESULT
COMBOEX_GetExtendedStyle (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);

    return (LRESULT)infoPtr->dwExtStyle;
}


inline static LRESULT
COMBOEX_GetImageList (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);

    TRACE("(0x%08x 0x%08lx)\n", wParam, lParam);

    return (LRESULT)infoPtr->himl;
}


static LRESULT
COMBOEX_InsertItemA (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    /* COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd); */

    FIXME("(0x%08x 0x%08lx)\n", wParam, lParam);

    return -1;
}


static LRESULT
COMBOEX_SetExtendedStyle (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);
    DWORD dwTemp;

    TRACE("(0x%08x 0x%08lx)\n", wParam, lParam);

    dwTemp = infoPtr->dwExtStyle;

    if ((DWORD)wParam) {
	infoPtr->dwExtStyle = (infoPtr->dwExtStyle & ~(DWORD)wParam) | (DWORD)lParam;
    }
    else
	infoPtr->dwExtStyle = (DWORD)lParam;

    /* FIXME: repaint?? */

    return (LRESULT)dwTemp;
}


inline static LRESULT
COMBOEX_SetImageList (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);
    HIMAGELIST himlTemp;

    TRACE("(0x%08x 0x%08lx)\n", wParam, lParam);

    himlTemp = infoPtr->himl;
    infoPtr->himl = (HIMAGELIST)lParam;

    return (LRESULT)himlTemp;
}


static LRESULT
COMBOEX_SetItemA (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    /* COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd); */

    FIXME("(%p): stub\n", (LPVOID)lParam);

    return TRUE;
}


/* << COMBOEX_SetItem32W >> */


inline static LRESULT
COMBOEX_Forward (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);

    FIXME("(0x%x 0x%x 0x%lx): stub\n", uMsg, wParam, lParam);

    if (infoPtr->hwndCombo)    
	return SendMessageA (infoPtr->hwndCombo, uMsg, wParam, lParam);

    return 0;
}


static LRESULT
COMBOEX_Create (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr;
    DWORD dwComboStyle;

    /* allocate memory for info structure */
    infoPtr = (COMBOEX_INFO *)COMCTL32_Alloc (sizeof(COMBOEX_INFO));
    if (infoPtr == NULL) {
	ERR("could not allocate info memory!\n");
	return 0;
    }

    SetWindowLongA (hwnd, 0, (DWORD)infoPtr);


    /* initialize info structure */


    /* create combo box */
    dwComboStyle = GetWindowLongA (hwnd, GWL_STYLE) &
			(CBS_SIMPLE|CBS_DROPDOWN|CBS_DROPDOWNLIST|WS_CHILD);

    infoPtr->hwndCombo = CreateWindowA ("ComboBox", "",
			 WS_CHILD | WS_VISIBLE | CBS_OWNERDRAWFIXED | dwComboStyle,
			0, 0, 0, 0, hwnd, (HMENU)1,
			GetWindowLongA (hwnd, GWL_HINSTANCE), NULL);

    return 0;
}


static LRESULT
COMBOEX_Destroy (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);


    if (infoPtr->hwndCombo)
	DestroyWindow (infoPtr->hwndCombo);


    /* free comboex info data */
    COMCTL32_Free (infoPtr);
    SetWindowLongA (hwnd, 0, 0);
    return 0;
}


static LRESULT
COMBOEX_Size (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    COMBOEX_INFO *infoPtr = COMBOEX_GetInfoPtr (hwnd);
    RECT rect;

    GetClientRect (hwnd, &rect);

    MoveWindow (infoPtr->hwndCombo, 0, 0, rect.right -rect.left,
		  rect.bottom - rect.top, TRUE);

    return 0;
}


static LRESULT WINAPI
COMBOEX_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    TRACE("hwnd=%x msg=%x wparam=%x lParam=%lx\n", hwnd, uMsg, wParam, lParam);
    if (!COMBOEX_GetInfoPtr (hwnd) && (uMsg != WM_CREATE))
        return DefWindowProcA (hwnd, uMsg, wParam, lParam);

    switch (uMsg)
    {
/*	case CBEM_DELETEITEM: */

	case CBEM_GETCOMBOCONTROL:
	    return COMBOEX_GetComboControl (hwnd, wParam, lParam);

	case CBEM_GETEDITCONTROL:
	    return COMBOEX_GetEditControl (hwnd, wParam, lParam);

	case CBEM_GETEXTENDEDSTYLE:
	    return COMBOEX_GetExtendedStyle (hwnd, wParam, lParam);

	case CBEM_GETIMAGELIST:
	    return COMBOEX_GetImageList (hwnd, wParam, lParam);

/*	case CBEM_GETITEM32A:
	case CBEM_GETITEM32W:
	case CBEM_GETUNICODEFORMAT:
	case CBEM_HASEDITCHANGED:
*/

	case CBEM_INSERTITEMA:
	    return COMBOEX_InsertItemA (hwnd, wParam, lParam);

/*	case CBEM_INSERTITEM32W: */

	case CBEM_SETEXTENDEDSTYLE:
	    return COMBOEX_SetExtendedStyle (hwnd, wParam, lParam);

	case CBEM_SETIMAGELIST:
	    return COMBOEX_SetImageList (hwnd, wParam, lParam);

	case CBEM_SETITEMA:
	    return COMBOEX_SetItemA (hwnd, wParam, lParam);

/*	case CBEM_SETITEM32W:
	case CBEM_SETUNICODEFORMAT:
*/

	case CB_DELETESTRING:
	case CB_FINDSTRINGEXACT:
	case CB_GETCOUNT:
	case CB_GETCURSEL:
	case CB_GETDROPPEDCONTROLRECT:
	case CB_GETDROPPEDSTATE:
	case CB_GETITEMDATA:
	case CB_GETITEMHEIGHT:
	case CB_GETLBTEXT:
	case CB_GETLBTEXTLEN:
	case CB_GETEXTENDEDUI:
	case CB_LIMITTEXT:
	case CB_RESETCONTENT:
	case CB_SELECTSTRING:
	case CB_SETCURSEL:
	case CB_SETDROPPEDWIDTH:
	case CB_SETEXTENDEDUI:
	case CB_SETITEMDATA:
	case CB_SETITEMHEIGHT:
	case CB_SHOWDROPDOWN:
	    return COMBOEX_Forward (hwnd, uMsg, wParam, lParam);


	case WM_CREATE:
	    return COMBOEX_Create (hwnd, wParam, lParam);

	case WM_DESTROY:
	    return COMBOEX_Destroy (hwnd, wParam, lParam);

	case WM_SIZE:
	    return COMBOEX_Size (hwnd, wParam, lParam);

	default:
	    if (uMsg >= WM_USER)
		ERR("unknown msg %04x wp=%08x lp=%08lx\n",
		     uMsg, wParam, lParam);
	    return DefWindowProcA (hwnd, uMsg, wParam, lParam);
    }
    return 0;
}


VOID
COMBOEX_Register (void)
{
    WNDCLASSA wndClass;

    ZeroMemory (&wndClass, sizeof(WNDCLASSA));
    wndClass.style         = CS_GLOBALCLASS;
    wndClass.lpfnWndProc   = (WNDPROC)COMBOEX_WindowProc;
    wndClass.cbClsExtra    = 0;
    wndClass.cbWndExtra    = sizeof(COMBOEX_INFO *);
    wndClass.hCursor       = LoadCursorA (0, IDC_ARROWA);
    wndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wndClass.lpszClassName = WC_COMBOBOXEXA;
 
    RegisterClassA (&wndClass);
}


VOID
COMBOEX_Unregister (void)
{
    UnregisterClassA (WC_COMBOBOXEXA, (HINSTANCE)NULL);
}