main.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

                               LPARAM lParam)
{
    switch (msg) {

    case WM_CREATE:
    {
        static const WCHAR editW[] = { 'e','d','i','t',0 };
        RECT rc;
        GetClientRect(hWnd, &rc);
        Globals.hEdit = CreateWindowEx(EDIT_EXSTYLE, editW, NULL, Globals.bWrapLongLines ? EDIT_STYLE_WRAP : EDIT_STYLE,
                             0, 0, rc.right, rc.bottom, hWnd,
                             NULL, Globals.hInstance, NULL);
        if (!Globals.hEdit)
            return -1;
        SendMessage(Globals.hEdit, EM_LIMITTEXT, 0, 0);
        if (Globals.hFont)
            SendMessage(Globals.hEdit, WM_SETFONT, (WPARAM)Globals.hFont, (LPARAM)TRUE);
        break;
    }

    case WM_COMMAND:
        if (HIWORD(wParam) == EN_CHANGE || HIWORD(wParam) == EN_HSCROLL || HIWORD(wParam) == EN_VSCROLL)
            DIALOG_StatusBarUpdateCaretPos();
        NOTEPAD_MenuCommand(LOWORD(wParam));
        break;

    case WM_DESTROYCLIPBOARD:
        /*MessageBox(Globals.hMainWnd, "Empty clipboard", "Debug", MB_ICONEXCLAMATION);*/
        break;

    case WM_CLOSE:
        if (DoCloseFile()) {
            DestroyWindow(hWnd);
        }
        break;

    case WM_QUERYENDSESSION:
        if (DoCloseFile()) {
            return 1;
        }
        break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    case WM_SIZE:
    {
        if (Globals.bShowStatusBar)
        {
            RECT rcStatusBar;
            HDWP hdwp;

            if (!GetWindowRect(Globals.hStatusBar, &rcStatusBar))
                break;

            hdwp = BeginDeferWindowPos(2);
            if (hdwp == NULL)
                break;

            hdwp = DeferWindowPos(hdwp, Globals.hEdit, NULL, 0, 0, LOWORD(lParam), HIWORD(lParam) - (rcStatusBar.bottom - rcStatusBar.top), SWP_NOZORDER | SWP_NOMOVE);
            if (hdwp == NULL)
                break;

            hdwp = DeferWindowPos(hdwp, Globals.hStatusBar, NULL, 0, 0, LOWORD(lParam), LOWORD(wParam), SWP_NOZORDER);

            if (hdwp != NULL)
                EndDeferWindowPos(hdwp);
        }
        else
            SetWindowPos(Globals.hEdit, NULL, 0, 0, LOWORD(lParam), HIWORD(lParam), SWP_NOZORDER | SWP_NOMOVE);

        break;
    }

    case WM_SETFOCUS:
        SetFocus(Globals.hEdit);
        break;

    case WM_DROPFILES:
    {
        WCHAR szFileName[MAX_PATH];
        HDROP hDrop = (HDROP) wParam;

        DragQueryFile(hDrop, 0, szFileName, SIZEOF(szFileName));
        DragFinish(hDrop);
        DoOpenFile(szFileName);
        break;
    }
    case WM_CHAR:
    case WM_INITMENUPOPUP:
        NOTEPAD_InitMenuPopup((HMENU)wParam, lParam);
        break;
    default:
        if (msg == aFINDMSGSTRING)
        {
            FINDREPLACE *pFindReplace = (FINDREPLACE *) lParam;
            Globals.find = *(FINDREPLACE *) lParam;

            if (pFindReplace->Flags & FR_FINDNEXT)
                NOTEPAD_FindNext(pFindReplace, FALSE, TRUE);
            else if (pFindReplace->Flags & FR_REPLACE)
                NOTEPAD_FindNext(pFindReplace, TRUE, TRUE);
            else if (pFindReplace->Flags & FR_REPLACEALL)
                NOTEPAD_ReplaceAll(pFindReplace);
            else if (pFindReplace->Flags & FR_DIALOGTERM)
                NOTEPAD_FindTerm();
            break;
        }

        return DefWindowProc(hWnd, msg, wParam, lParam);
    }
    return 0;
}

static int AlertFileDoesNotExist(LPCWSTR szFileName)
{
   int nResult;
   WCHAR szMessage[MAX_STRING_LEN];
   WCHAR szResource[MAX_STRING_LEN];

   LoadString(Globals.hInstance, STRING_DOESNOTEXIST, szResource, SIZEOF(szResource));
   wsprintf(szMessage, szResource, szFileName);

   LoadString(Globals.hInstance, STRING_NOTEPAD, szResource, SIZEOF(szResource));

   nResult = MessageBox(Globals.hMainWnd, szMessage, szResource,
                        MB_ICONEXCLAMATION | MB_YESNO);

   return(nResult);
}

static void HandleCommandLine(LPWSTR cmdline)
{
    WCHAR delimiter;
    int opt_print=0;

    /* skip white space */
    while (*cmdline == ' ') cmdline++;

    /* skip executable name */
    delimiter = (*cmdline == '"' ? '"' : ' ');

    do
    {
        cmdline++;
    }
    while (*cmdline && *cmdline != delimiter);
    if (*cmdline == delimiter) cmdline++;

    while (*cmdline == ' ' || *cmdline == '-' || *cmdline == '/')
    {
        WCHAR option;

        if (*cmdline++ == ' ') continue;

        option = *cmdline;
        if (option) cmdline++;
        while (*cmdline == ' ') cmdline++;

        switch(option)
        {
            case 'p':
            case 'P':
                opt_print=1;
                break;
        }
    }

    if (*cmdline)
    {
        /* file name is passed in the command line */
        LPCWSTR file_name = NULL;
        BOOL file_exists = FALSE;
        WCHAR buf[MAX_PATH];

        if (cmdline[0] == '"')
        {
            cmdline++;
            cmdline[lstrlen(cmdline) - 1] = 0;
        }

        file_name = cmdline;
        if (FileExists(file_name))
        {
            file_exists = TRUE;
        }
        else if (!HasFileExtension(cmdline))
        {
            static const WCHAR txtW[] = { '.','t','x','t',0 };

            /* try to find file with ".txt" extension */
            if (!lstrcmp(txtW, cmdline + lstrlen(cmdline) - lstrlen(txtW)))
            {
                file_exists = FALSE;
            }
            else
            {
                lstrcpyn(buf, cmdline, MAX_PATH - lstrlen(txtW) - 1);
                lstrcat(buf, txtW);
                file_name = buf;
                file_exists = FileExists(file_name);
            }
        }

        if (file_exists)
        {
            DoOpenFile(file_name);
            InvalidateRect(Globals.hMainWnd, NULL, FALSE);
            if (opt_print)
                DIALOG_FilePrint();
        }
        else
        {
            switch (AlertFileDoesNotExist(file_name)) {
            case IDYES:
                DoOpenFile(file_name);
                break;

            case IDNO:
                break;
            }
        }
     }
}

/***********************************************************************
 *
 *           WinMain
 */
int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE prev, LPSTR cmdline, int show)
{
    MSG        msg;
    HACCEL     hAccel;
    WNDCLASSEX wndclass;
    static const WCHAR className[] = {'N','P','C','l','a','s','s',0};
    static const WCHAR winName[]   = {'N','o','t','e','p','a','d',0};

    UNREFERENCED_PARAMETER(prev);
    UNREFERENCED_PARAMETER(cmdline);

    aFINDMSGSTRING = (ATOM) RegisterWindowMessage(FINDMSGSTRING);

    ZeroMemory(&Globals, sizeof(Globals));
    Globals.hInstance       = hInstance;
    LoadSettings();

    ZeroMemory(&wndclass, sizeof(wndclass));
    wndclass.cbSize        = sizeof(wndclass);
    wndclass.lpfnWndProc   = NOTEPAD_WndProc;
    wndclass.hInstance     = Globals.hInstance;
    wndclass.hIcon         = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_NPICON));
    wndclass.hCursor       = LoadCursor(0, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wndclass.lpszMenuName  = MAKEINTRESOURCE(MAIN_MENU);
    wndclass.lpszClassName = className;
    wndclass.hIconSm       = (HICON)LoadImage(hInstance, MAKEINTRESOURCE(IDI_NPICON),
                            IMAGE_ICON, 16, 16, 0);

    if (!RegisterClassEx(&wndclass)) return FALSE;

    /* Setup windows */

    Globals.hMainWnd =
        CreateWindow(className, winName, WS_OVERLAPPEDWINDOW,
                     CW_USEDEFAULT, 0, CW_USEDEFAULT, 0,
                     NULL, NULL, Globals.hInstance, NULL);
    if (!Globals.hMainWnd)
    {
        ShowLastError();
        ExitProcess(1);
    }

    NOTEPAD_InitData();
    DIALOG_FileNew();

    ShowWindow(Globals.hMainWnd, show);
    UpdateWindow(Globals.hMainWnd);
    DragAcceptFiles(Globals.hMainWnd, TRUE);

    HandleCommandLine(GetCommandLine());

    hAccel = LoadAccelerators( hInstance, MAKEINTRESOURCE(ID_ACCEL) );

    while (GetMessage(&msg, 0, 0, 0))
    {
        if (!IsDialogMessage(Globals.hFindReplaceDlg, &msg) &&
            !TranslateAccelerator(Globals.hMainWnd, hAccel, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }
    SaveSettings();
    return (int) msg.wParam;
}