ipaddress.c

winNT技术操作系统,国外开放的原代码和LIUX一样

static void IPADDRESS_ClearAddress (IPADDRESS_INFO *infoPtr)
{
    WCHAR nil[1] = { 0 };
    int i;

    TRACE("\n");

    for (i = 0; i < 4; i++)
        SetWindowTextW (infoPtr->Part[i].EditHwnd, nil);
}


static LRESULT IPADDRESS_SetAddress (IPADDRESS_INFO *infoPtr, DWORD ip_address)
{
    WCHAR buf[20];
    static const WCHAR fmt[] = { '%', 'd', 0 };
    int i;

    TRACE("\n");

    for (i = 3; i >= 0; i--) {
	IPPART_INFO* part = &infoPtr->Part[i];
        int value = ip_address & 0xff;
	if ( (value >= part->LowerLimit) && (value <= part->UpperLimit) ) {
	    wsprintfW (buf, fmt, value);
	    SetWindowTextW (part->EditHwnd, buf);
	    IPADDRESS_Notify (infoPtr, EN_CHANGE);
        }
        ip_address >>= 8;
    }

    return TRUE;
}


static void IPADDRESS_SetFocusToField (IPADDRESS_INFO *infoPtr, INT index)
{
    TRACE("(index=%d)\n", index);

    if (index > 3 || index < 0) index=0;

    SetFocus (infoPtr->Part[index].EditHwnd);
}


static BOOL IPADDRESS_ConstrainField (IPADDRESS_INFO *infoPtr, int currentfield)
{
    IPPART_INFO *part = &infoPtr->Part[currentfield];
    WCHAR field[10];
    static const WCHAR fmt[] = { '%', 'd', 0 };
    int curValue, newValue;

    TRACE("(currentfield=%d)\n", currentfield);

    if (currentfield < 0 || currentfield > 3) return FALSE;

    if (!GetWindowTextW (part->EditHwnd, field, 4)) return FALSE;

    curValue = atoiW(field);
    TRACE("  curValue=%d\n", curValue);

    newValue = IPADDRESS_IPNotify(infoPtr, currentfield, curValue);
    TRACE("  newValue=%d\n", newValue);

    if (newValue < part->LowerLimit) newValue = part->LowerLimit;
    if (newValue > part->UpperLimit) newValue = part->UpperLimit;

    if (newValue == curValue) return FALSE;

    wsprintfW (field, fmt, newValue);
    TRACE("  field='%s'\n", debugstr_w(field));
    return SetWindowTextW (part->EditHwnd, field);
}


static BOOL IPADDRESS_GotoNextField (IPADDRESS_INFO *infoPtr, int cur, int sel)
{
    TRACE("\n");

    if(cur >= -1 && cur < 4) {
	IPADDRESS_ConstrainField(infoPtr, cur);

	if(cur < 3) {
	    IPPART_INFO *next = &infoPtr->Part[cur + 1];
	    int start = 0, end = 0;
            SetFocus (next->EditHwnd);
	    if (sel != POS_DEFAULT) {
		if (sel == POS_RIGHT)
		    start = end = GetWindowTextLengthW(next->EditHwnd);
		else if (sel == POS_SELALL)
		    end = -1;
	        SendMessageW(next->EditHwnd, EM_SETSEL, start, end);
	    }
	    return TRUE;
	}

    }
    return FALSE;
}


/*
 * period: move and select the text in the next field to the right if
 *         the current field is not empty(l!=0), we are not in the
 *         left most position, and nothing is selected(startsel==endsel)
 *
 * spacebar: same behavior as period
 *
 * alpha characters: completely ignored
 *
 * digits: accepted when field text length < 2 ignored otherwise.
 *         when 3 numbers have been entered into the field the value
 *         of the field is checked, if the field value exceeds the
 *         maximum value and is changed the field remains the current
 *         field, otherwise focus moves to the field to the right
 *
 * tab: change focus from the current ipaddress control to the next
 *      control in the tab order
 *
 * right arrow: move to the field on the right to the left most
 *              position in that field if no text is selected,
 *              we are in the right most position in the field,
 *              we are not in the right most field
 *
 * left arrow: move to the field on the left to the right most
 *             position in that field if no text is selected,
 *             we are in the left most position in the current field
 *             and we are not in the left most field
 *
 * backspace: delete the character to the left of the cursor position,
 *            if none are present move to the field on the left if
 *            we are not in the left most field and delete the right
 *            most digit in that field while keeping the cursor
 *            on the right side of the field
 */
LRESULT CALLBACK
IPADDRESS_SubclassProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    HWND Self = (HWND)GetPropW (hwnd, IP_SUBCLASS_PROP);
    IPADDRESS_INFO *infoPtr = (IPADDRESS_INFO *)GetWindowLongPtrW (Self, 0);
    CHAR c = (CHAR)wParam;
    INT index, len = 0, startsel, endsel;
    IPPART_INFO *part;

    TRACE("(hwnd=%p msg=0x%x wparam=0x%x lparam=0x%lx)\n", hwnd, uMsg, wParam, lParam);

    if ( (index = IPADDRESS_GetPartIndex(infoPtr, hwnd)) < 0) return 0;
    part = &infoPtr->Part[index];

    if (uMsg == WM_CHAR || uMsg == WM_KEYDOWN) {
	len = GetWindowTextLengthW (hwnd);
	SendMessageW(hwnd, EM_GETSEL, (WPARAM)&startsel, (LPARAM)&endsel);
    }
    switch (uMsg) {
 	case WM_CHAR:
 	    if(isdigit(c)) {
		if(len == 2 && startsel==endsel && endsel==len) {
		    /* process the digit press before we check the field */
		    int return_val = CallWindowProcW (part->OrigProc, hwnd, uMsg, wParam, lParam);

		    /* if the field value was changed stay at the current field */
		    if(!IPADDRESS_ConstrainField(infoPtr, index))
			IPADDRESS_GotoNextField (infoPtr, index, POS_DEFAULT);

		    return return_val;
		} else if (len == 3 && startsel==endsel && endsel==len)
		    IPADDRESS_GotoNextField (infoPtr, index, POS_SELALL);
		else if (len < 3) break;
	    } else if(c == '.' || c == ' ') {
		if(len && startsel==endsel && startsel != 0) {
		    IPADDRESS_GotoNextField(infoPtr, index, POS_SELALL);
		}
 	    } else if (c == VK_BACK) break;
	    return 0;

	case WM_KEYDOWN:
	    switch(c) {
		case VK_RIGHT:
		    if(startsel==endsel && startsel==len) {
			IPADDRESS_GotoNextField(infoPtr, index, POS_LEFT);
			return 0;
		    }
		    break;
		case VK_LEFT:
		    if(startsel==0 && startsel==endsel && index > 0) {
			IPADDRESS_GotoNextField(infoPtr, index - 2, POS_RIGHT);
			return 0;
		    }
		    break;
		case VK_BACK:
		    if(startsel==endsel && startsel==0 && index > 0) {
			IPPART_INFO *prev = &infoPtr->Part[index-1];
			WCHAR val[10];

			if(GetWindowTextW(prev->EditHwnd, val, 5)) {
			    val[lstrlenW(val) - 1] = 0;
			    SetWindowTextW(prev->EditHwnd, val);
			}

			IPADDRESS_GotoNextField(infoPtr, index - 2, POS_RIGHT);
			return 0;
		    }
		    break;
	    }
	    break;
	case WM_KILLFOCUS:
	    if (IPADDRESS_GetPartIndex(infoPtr, (HWND)wParam) < 0)
		IPADDRESS_Notify(infoPtr, EN_KILLFOCUS);
	    break;
	case WM_SETFOCUS:
	    if (IPADDRESS_GetPartIndex(infoPtr, (HWND)wParam) < 0)
		IPADDRESS_Notify(infoPtr, EN_SETFOCUS);
	    break;
    }
    return CallWindowProcW (part->OrigProc, hwnd, uMsg, wParam, lParam);
}


static LRESULT WINAPI
IPADDRESS_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    IPADDRESS_INFO *infoPtr = (IPADDRESS_INFO *)GetWindowLongPtrW (hwnd, 0);

    TRACE("(hwnd=%p msg=0x%x wparam=0x%x lparam=0x%lx)\n", hwnd, uMsg, wParam, lParam);

    if (!infoPtr && (uMsg != WM_CREATE))
        return DefWindowProcW (hwnd, uMsg, wParam, lParam);

    switch (uMsg)
    {
	case WM_CREATE:
	    return IPADDRESS_Create (hwnd, (LPCREATESTRUCTA)lParam);

	case WM_DESTROY:
	    return IPADDRESS_Destroy (infoPtr);

	case WM_ENABLE:
	    return IPADDRESS_Enable (infoPtr, (BOOL)wParam);
	    break;

	case WM_PAINT:
	    return IPADDRESS_Paint (infoPtr, (HDC)wParam);

	case WM_COMMAND:
	    switch(wParam >> 16) {
		case EN_CHANGE:
		    IPADDRESS_Notify(infoPtr, EN_CHANGE);
		    break;
		case EN_KILLFOCUS:
		    IPADDRESS_ConstrainField(infoPtr, IPADDRESS_GetPartIndex(infoPtr, (HWND)lParam));
		    break;
	    }
	    break;

        case IPM_CLEARADDRESS:
            IPADDRESS_ClearAddress (infoPtr);
	    break;

        case IPM_SETADDRESS:
            return IPADDRESS_SetAddress (infoPtr, (DWORD)lParam);

        case IPM_GETADDRESS:
 	    return IPADDRESS_GetAddress (infoPtr, (LPDWORD)lParam);

	case IPM_SETRANGE:
	    return IPADDRESS_SetRange (infoPtr, (int)wParam, (WORD)lParam);

	case IPM_SETFOCUS:
	    IPADDRESS_SetFocusToField (infoPtr, (int)wParam);
	    break;

	case IPM_ISBLANK:
	    return IPADDRESS_IsBlank (infoPtr);

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


void IPADDRESS_Register (void)
{
    WNDCLASSW wndClass;

    ZeroMemory (&wndClass, sizeof(WNDCLASSW));
    wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
    wndClass.lpfnWndProc   = IPADDRESS_WindowProc;
    wndClass.cbClsExtra    = 0;
    wndClass.cbWndExtra    = sizeof(IPADDRESS_INFO *);
    wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_IBEAM);
    wndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
    wndClass.lpszClassName = WC_IPADDRESSW;

    RegisterClassW (&wndClass);
}


void IPADDRESS_Unregister (void)
{
    UnregisterClassW (WC_IPADDRESSW, NULL);
}