Prevent network errors from summarily closing the window when CoE is off

[u/mdw/putty] / window.c

#include <windows.h>
#include <commctrl.h>
#include <winsock.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>

#define PUTTY_DO_GLOBALS                       /* actually _define_ globals */
#include "putty.h"
#include "win_res.h"

#define IDM_SHOWLOG   0x0010
#define IDM_NEWSESS   0x0020
#define IDM_DUPSESS   0x0030
#define IDM_RECONF    0x0040
#define IDM_CLRSB     0x0050
#define IDM_RESET     0x0060
#define IDM_TEL_AYT   0x0070
#define IDM_TEL_BRK   0x0080
#define IDM_TEL_SYNCH 0x0090
#define IDM_TEL_EC    0x00a0
#define IDM_TEL_EL    0x00b0
#define IDM_TEL_GA    0x00c0
#define IDM_TEL_NOP   0x00d0
#define IDM_TEL_ABORT 0x00e0
#define IDM_TEL_AO    0x00f0
#define IDM_TEL_IP    0x0100
#define IDM_TEL_SUSP  0x0110
#define IDM_TEL_EOR   0x0120
#define IDM_TEL_EOF   0x0130
#define IDM_ABOUT     0x0140
#define IDM_SAVEDSESS 0x0150

#define IDM_SAVED_MIN 0x1000
#define IDM_SAVED_MAX 0x2000

#define WM_IGNORE_SIZE (WM_XUSER + 1)
#define WM_IGNORE_CLIP (WM_XUSER + 2)
#define WM_IGNORE_KEYMENU (WM_XUSER + 3)

static LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
static int TranslateKey(UINT message, WPARAM wParam, LPARAM lParam, unsigned char *output);
static void cfgtopalette(void);
static void init_palette(void);
static void init_fonts(int);

static int extra_width, extra_height;

static int pending_netevent = 0;
static WPARAM pend_netevent_wParam = 0;
static LPARAM pend_netevent_lParam = 0;
static void enact_pending_netevent(void);

#define FONT_NORMAL 0
#define FONT_BOLD 1
#define FONT_UNDERLINE 2
#define FONT_BOLDUND 3
#define FONT_OEM 4
#define FONT_OEMBOLD 5
#define FONT_OEMBOLDUND 6
#define FONT_OEMUND 7
static HFONT fonts[8];
static int font_needs_hand_underlining;
static enum {
    BOLD_COLOURS, BOLD_SHADOW, BOLD_FONT
} bold_mode;
static enum {
    UND_LINE, UND_FONT
} und_mode;
static int descent;

#define NCOLOURS 24
static COLORREF colours[NCOLOURS];
static HPALETTE pal;
static LPLOGPALETTE logpal;
static RGBTRIPLE defpal[NCOLOURS];

static HWND hwnd;

static int dbltime, lasttime, lastact;
static Mouse_Button lastbtn;

static char *window_name, *icon_name;

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
    static char appname[] = "PuTTY";
    WORD winsock_ver;
    WSADATA wsadata;
    WNDCLASS wndclass;
    MSG msg;
    int guess_width, guess_height;

    putty_inst = inst;
    flags = FLAG_VERBOSE | FLAG_INTERACTIVE;

    winsock_ver = MAKEWORD(1, 1);
    if (WSAStartup(winsock_ver, &wsadata)) {
        MessageBox(NULL, "Unable to initialise WinSock", "WinSock Error",
                   MB_OK | MB_ICONEXCLAMATION);
        return 1;
    }
    if (LOBYTE(wsadata.wVersion) != 1 || HIBYTE(wsadata.wVersion) != 1) {
        MessageBox(NULL, "WinSock version is incompatible with 1.1",
                   "WinSock Error", MB_OK | MB_ICONEXCLAMATION);
        WSACleanup();
        return 1;
    }
    /* WISHLIST: maybe allow config tweaking even if winsock not present? */

    InitCommonControls();

    /*
     * Process the command line.
     */
    {
        char *p;

        default_protocol = DEFAULT_PROTOCOL;
        default_port = DEFAULT_PORT;

        do_defaults(NULL);

        p = cmdline;
        while (*p && isspace(*p)) p++;

        /*
         * Process command line options first. Yes, this can be
         * done better, and it will be as soon as I have the
         * energy...
         */
        while (*p == '-') {
            char *q = p + strcspn(p, " \t");
            p++;
            if (q == p + 3 &&
                tolower(p[0]) == 's' &&
                tolower(p[1]) == 's' &&
                tolower(p[2]) == 'h') {
                default_protocol = cfg.protocol = PROT_SSH;
                default_port = cfg.port = 22;
            } else if (q == p + 3 &&
                tolower(p[0]) == 'l' &&
                tolower(p[1]) == 'o' &&
                tolower(p[2]) == 'g') {
                logfile = "putty.log";
            }
            p = q + strspn(q, " \t");
        }

        /*
         * An initial @ means to activate a saved session.
         */
        if (*p == '@') {
            do_defaults (p+1);
            if (!*cfg.host && !do_config()) {
                WSACleanup();
                return 0;
            }
        } else if (*p == '&') {
            /*
             * An initial & means we've been given a command line
             * containing the hex value of a HANDLE for a file
             * mapping object, which we must then extract as a
             * config.
             */
            HANDLE filemap;
            Config *cp;
            if (sscanf(p+1, "%p", &filemap) == 1 &&
                (cp = MapViewOfFile(filemap, FILE_MAP_READ,
                                    0, 0, sizeof(Config))) != NULL) {
                cfg = *cp;
                UnmapViewOfFile(cp);
                CloseHandle(filemap);
            } else if (!do_config()) {
                WSACleanup();
                return 0;
            }
        } else if (*p) {
            char *q = p;
            /*
             * If the hostname starts with "telnet:", set the
             * protocol to Telnet and process the string as a
             * Telnet URL.
             */
            if (!strncmp(q, "telnet:", 7)) {
                char c;

                q += 7;
                if (q[0] == '/' && q[1] == '/')
                    q += 2;
                cfg.protocol = PROT_TELNET;
                p = q;
                while (*p && *p != ':' && *p != '/') p++;
                c = *p;
                if (*p)
                    *p++ = '\0';
                if (c == ':')
                    cfg.port = atoi(p);
                else
                    cfg.port = -1;
                strncpy (cfg.host, q, sizeof(cfg.host)-1);
                cfg.host[sizeof(cfg.host)-1] = '\0';
            } else {
                while (*p && !isspace(*p)) p++;
                if (*p)
                    *p++ = '\0';
                strncpy (cfg.host, q, sizeof(cfg.host)-1);
                cfg.host[sizeof(cfg.host)-1] = '\0';
                while (*p && isspace(*p)) p++;
                if (*p)
                    cfg.port = atoi(p);
                else
                    cfg.port = -1;
            }
        } else {
            if (!do_config()) {
                WSACleanup();
                return 0;
            }
        }
    }

    /*
     * Select protocol. This is farmed out into a table in a
     * separate file to enable an ssh-free variant.
     */
    {
        int i;
        back = NULL;
        for (i = 0; backends[i].backend != NULL; i++)
            if (backends[i].protocol == cfg.protocol) {
                back = backends[i].backend;
                break;
            }
        if (back == NULL) {
            MessageBox(NULL, "Unsupported protocol number found",
                       "PuTTY Internal Error", MB_OK | MB_ICONEXCLAMATION);
            WSACleanup();
            return 1;
        }
    }

    ldisc = (cfg.ldisc_term ? &ldisc_term : &ldisc_simple);

    if (!prev) {
        wndclass.style         = 0;
        wndclass.lpfnWndProc   = WndProc;
        wndclass.cbClsExtra    = 0;
        wndclass.cbWndExtra    = 0;
        wndclass.hInstance     = inst;
        wndclass.hIcon         = LoadIcon (inst,
                                           MAKEINTRESOURCE(IDI_MAINICON));
        wndclass.hCursor       = LoadCursor (NULL, IDC_IBEAM);
        wndclass.hbrBackground = GetStockObject (BLACK_BRUSH);
        wndclass.lpszMenuName  = NULL;
        wndclass.lpszClassName = appname;

        RegisterClass (&wndclass);
    }

    hwnd = NULL;

    savelines = cfg.savelines;
    term_init();

    cfgtopalette();

    /*
     * Guess some defaults for the window size. This all gets
     * updated later, so we don't really care too much. However, we
     * do want the font width/height guesses to correspond to a
     * large font rather than a small one...
     */
    
    font_width = 10;
    font_height = 20;
    extra_width = 25;
    extra_height = 28;
    term_size (cfg.height, cfg.width, cfg.savelines);
    guess_width = extra_width + font_width * cols;
    guess_height = extra_height + font_height * rows;
    {
        RECT r;
        HWND w = GetDesktopWindow();
        GetWindowRect (w, &r);
        if (guess_width > r.right - r.left)
            guess_width = r.right - r.left;
        if (guess_height > r.bottom - r.top)
            guess_height = r.bottom - r.top;
    }

    {
       int winmode = WS_OVERLAPPEDWINDOW|WS_VSCROLL;
       if (!cfg.scrollbar) winmode &= ~(WS_VSCROLL);
       if (cfg.locksize)   winmode &= ~(WS_THICKFRAME|WS_MAXIMIZEBOX);
       hwnd = CreateWindow (appname, appname,
                            winmode,
                            CW_USEDEFAULT, CW_USEDEFAULT,
                            guess_width, guess_height,
                            NULL, NULL, inst, NULL);
    }

    /*
     * Initialise the fonts, simultaneously correcting the guesses
     * for font_{width,height}.
     */
    bold_mode = cfg.bold_colour ? BOLD_COLOURS : BOLD_FONT;
    und_mode = UND_FONT;
    init_fonts(0);

    /*
     * Correct the guesses for extra_{width,height}.
     */
    {
        RECT cr, wr;
        GetWindowRect (hwnd, &wr);
        GetClientRect (hwnd, &cr);
        extra_width = wr.right - wr.left - cr.right + cr.left;
        extra_height = wr.bottom - wr.top - cr.bottom + cr.top;
    }

    /*
     * Resize the window, now we know what size we _really_ want it
     * to be.
     */
    guess_width = extra_width + font_width * cols;
    guess_height = extra_height + font_height * rows;
    SendMessage (hwnd, WM_IGNORE_SIZE, 0, 0);
    SetWindowPos (hwnd, NULL, 0, 0, guess_width, guess_height,
                  SWP_NOMOVE | SWP_NOREDRAW | SWP_NOZORDER);

    /*
     * Initialise the scroll bar.
     */
    {
        SCROLLINFO si;

        si.cbSize = sizeof(si);
        si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
        si.nMin = 0;
        si.nMax = rows-1;
        si.nPage = rows;
        si.nPos = 0;
        SetScrollInfo (hwnd, SB_VERT, &si, FALSE);
    }

    /*
     * Start up the telnet connection.
     */
    {
        char *error;
        char msg[1024];
        char *realhost;

        error = back->init (hwnd, cfg.host, cfg.port, &realhost);
        if (error) {
            sprintf(msg, "Unable to open connection:\n%s", error);
            MessageBox(NULL, msg, "PuTTY Error", MB_ICONERROR | MB_OK);
            return 0;
        }
        window_name = icon_name = NULL;
        sprintf(msg, "%s - PuTTY", realhost);
        set_title (msg);
        set_icon (msg);
    }

    session_closed = FALSE;

    /*
     * Set up the input and output buffers.
     */
    inbuf_head = 0;
    outbuf_reap = outbuf_head = 0;

    /*
     * Prepare the mouse handler.
     */
    lastact = MA_NOTHING;
    lastbtn = MB_NOTHING;
    dbltime = GetDoubleClickTime();

    /*
     * Set up the session-control options on the system menu.
     */
    {
        HMENU m = GetSystemMenu (hwnd, FALSE);
        HMENU p,s;
        int i;

        AppendMenu (m, MF_SEPARATOR, 0, 0);
        if (cfg.protocol == PROT_TELNET) {
            p = CreateMenu();
            AppendMenu (p, MF_ENABLED, IDM_TEL_AYT, "Are You There");
            AppendMenu (p, MF_ENABLED, IDM_TEL_BRK, "Break");
            AppendMenu (p, MF_ENABLED, IDM_TEL_SYNCH, "Synch");
            AppendMenu (p, MF_SEPARATOR, 0, 0);
            AppendMenu (p, MF_ENABLED, IDM_TEL_EC, "Erase Character");
            AppendMenu (p, MF_ENABLED, IDM_TEL_EL, "Erase Line");
            AppendMenu (p, MF_ENABLED, IDM_TEL_GA, "Go Ahead");
            AppendMenu (p, MF_ENABLED, IDM_TEL_NOP, "No Operation");
            AppendMenu (p, MF_SEPARATOR, 0, 0);
            AppendMenu (p, MF_ENABLED, IDM_TEL_ABORT, "Abort Process");
            AppendMenu (p, MF_ENABLED, IDM_TEL_AO, "Abort Output");
            AppendMenu (p, MF_ENABLED, IDM_TEL_IP, "Interrupt Process");
            AppendMenu (p, MF_ENABLED, IDM_TEL_SUSP, "Suspend Process");
            AppendMenu (p, MF_SEPARATOR, 0, 0);
            AppendMenu (p, MF_ENABLED, IDM_TEL_EOR, "End Of Record");
            AppendMenu (p, MF_ENABLED, IDM_TEL_EOF, "End Of File");
            AppendMenu (m, MF_POPUP | MF_ENABLED, (UINT) p, "Telnet Command");
            AppendMenu (m, MF_SEPARATOR, 0, 0);
        }
        AppendMenu (m, MF_ENABLED, IDM_SHOWLOG, "&Event Log");
        AppendMenu (m, MF_SEPARATOR, 0, 0);
        AppendMenu (m, MF_ENABLED, IDM_NEWSESS, "Ne&w Session");
        AppendMenu (m, MF_ENABLED, IDM_DUPSESS, "&Duplicate Session");
        s = CreateMenu();
        get_sesslist(TRUE);
        for (i = 1 ; i < ((nsessions < 256) ? nsessions : 256) ; i++)
          AppendMenu (s, MF_ENABLED, IDM_SAVED_MIN + (16 * i) , sessions[i]);
        AppendMenu (m, MF_POPUP | MF_ENABLED, (UINT) s, "Sa&ved Sessions");
        AppendMenu (m, MF_ENABLED, IDM_RECONF, "Chan&ge Settings");
        AppendMenu (m, MF_SEPARATOR, 0, 0);
        AppendMenu (m, MF_ENABLED, IDM_CLRSB, "C&lear Scrollback");
        AppendMenu (m, MF_ENABLED, IDM_RESET, "Rese&t Terminal");
        AppendMenu (m, MF_SEPARATOR, 0, 0);
        AppendMenu (m, MF_ENABLED, IDM_ABOUT, "&About PuTTY");
    }

    /*
     * Finally show the window!
     */
    ShowWindow (hwnd, show);

    /*
     * Set the palette up.
     */
    pal = NULL;
    logpal = NULL;
    init_palette();

    has_focus = (GetForegroundWindow() == hwnd);
    UpdateWindow (hwnd);

    {
        int timer_id = 0, long_timer = 0;

        while (GetMessage (&msg, NULL, 0, 0) == 1) {
            /* Sometimes DispatchMessage calls routines that use their own
             * GetMessage loop, setup this timer so we get some control back.
             *
             * Also call term_update() from the timer so that if the host
             * is sending data flat out we still do redraws.
             */
            if(timer_id && long_timer) {
                KillTimer(hwnd, timer_id);
                long_timer = timer_id = 0;
            }
            if(!timer_id)
                timer_id = SetTimer(hwnd, 1, 20, NULL);
            DispatchMessage (&msg);

            /* This is too fast, but I'll leave it for now 'cause it shows
             * how often term_update is called (far too often at times!)
             */
            term_blink(0);

            /* Send the paste buffer if there's anything to send */
            term_paste();

            /* If there's nothing new in the queue then we can do everything
             * we've delayed, reading the socket, writing, and repainting
             * the window.
             */
            if (!PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE)) {
                if (pending_netevent) {
                    enact_pending_netevent();

                    term_blink(1);
                }
            } else continue;
            if (!PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE)) {
                if (timer_id) {
                    KillTimer(hwnd, timer_id);
                    timer_id = 0;
                }
                if (inbuf_head)
                    term_out();
                term_update();
                if (!has_focus)
                   timer_id = SetTimer(hwnd, 1, 2000, NULL);
                else if (cfg.blinktext)
                   timer_id = SetTimer(hwnd, 1, 250, NULL);
                else
                   timer_id = SetTimer(hwnd, 1, 500, NULL);
                long_timer = 1;
            }
        }
    }

    /*
     * Clean up.
     */
    {
        int i;
        for (i=0; i<8; i++)
            if (fonts[i])
                DeleteObject(fonts[i]);
    }
    sfree(logpal);
    if (pal)
        DeleteObject(pal);
    WSACleanup();

    if (cfg.protocol == PROT_SSH) {
        random_save_seed();
#ifdef MSCRYPTOAPI
        crypto_wrapup();
#endif
    }

    return msg.wParam;
}

/*
 * Print a message box and close the connection.
 */
void connection_fatal(char *fmt, ...) {
    va_list ap;
    char stuff[200];

    va_start(ap, fmt);
    vsprintf(stuff, fmt, ap);
    va_end(ap);
    MessageBox(hwnd, stuff, "PuTTY Fatal Error", MB_ICONERROR | MB_OK);
    if (cfg.close_on_exit)
        PostQuitMessage(1);
    else {
        session_closed = TRUE;
        SetWindowText (hwnd, "PuTTY (inactive)");
    }
}

/*
 * Actually do the job requested by a WM_NETEVENT
 */
static void enact_pending_netevent(void) {
    int i;
    static int reentering = 0;

    if (reentering)
        return;                        /* don't unpend the pending */

    pending_netevent = FALSE;

    reentering = 1;
    i = back->msg (pend_netevent_wParam, pend_netevent_lParam);
    reentering = 0;

    if (i < 0) {
        char buf[1024];
        switch (WSABASEERR + (-i) % 10000) {
          case WSAECONNRESET:
            sprintf(buf, "Connection reset by peer");
            break;
          default:
            sprintf(buf, "Unexpected network error %d", -i);
            break;
        }
        connection_fatal(buf);
    }
    if (i <= 0) {
        if (cfg.close_on_exit)
            PostQuitMessage(0);
        else {
            session_closed = TRUE;
            MessageBox(hwnd, "Connection closed by remote host",
                       "PuTTY", MB_OK | MB_ICONINFORMATION);
            SetWindowText (hwnd, "PuTTY (inactive)");
        }
    }
}

/*
 * Copy the colour palette from the configuration data into defpal.
 * This is non-trivial because the colour indices are different.
 */
static void cfgtopalette(void) {
    int i;
    static const int ww[] = {
        6, 7, 8, 9, 10, 11, 12, 13,
        14, 15, 16, 17, 18, 19, 20, 21,
        0, 1, 2, 3, 4, 4, 5, 5
    };

    for (i=0; i<24; i++) {
        int w = ww[i];
        defpal[i].rgbtRed = cfg.colours[w][0];
        defpal[i].rgbtGreen = cfg.colours[w][1];
        defpal[i].rgbtBlue = cfg.colours[w][2];
    }
}

/*
 * Set up the colour palette.
 */
static void init_palette(void) {
    int i;
    HDC hdc = GetDC (hwnd);
    if (hdc) {
        if (cfg.try_palette &&
            GetDeviceCaps (hdc, RASTERCAPS) & RC_PALETTE) {
            logpal = smalloc(sizeof(*logpal)
                             - sizeof(logpal->palPalEntry)
                             + NCOLOURS * sizeof(PALETTEENTRY));
            logpal->palVersion = 0x300;
            logpal->palNumEntries = NCOLOURS;
            for (i = 0; i < NCOLOURS; i++) {
                logpal->palPalEntry[i].peRed = defpal[i].rgbtRed;
                logpal->palPalEntry[i].peGreen = defpal[i].rgbtGreen;
                logpal->palPalEntry[i].peBlue = defpal[i].rgbtBlue;
                logpal->palPalEntry[i].peFlags = PC_NOCOLLAPSE;
            }
            pal = CreatePalette (logpal);
            if (pal) {
                SelectPalette (hdc, pal, FALSE);
                RealizePalette (hdc);
                SelectPalette (hdc, GetStockObject (DEFAULT_PALETTE),
                               FALSE);
            }
        }
        ReleaseDC (hwnd, hdc);
    }
    if (pal)
        for (i=0; i<NCOLOURS; i++)
            colours[i] = PALETTERGB(defpal[i].rgbtRed,
                                    defpal[i].rgbtGreen,
                                    defpal[i].rgbtBlue);
    else
        for(i=0; i<NCOLOURS; i++)
            colours[i] = RGB(defpal[i].rgbtRed,
                             defpal[i].rgbtGreen,
                             defpal[i].rgbtBlue);
}

/*
 * Initialise all the fonts we will need. There may be as many as
 * eight or as few as one. We also:
 *
 * - check the font width and height, correcting our guesses if
 *   necessary.
 *
 * - verify that the bold font is the same width as the ordinary
 *   one, and engage shadow bolding if not.
 * 
 * - verify that the underlined font is the same width as the
 *   ordinary one (manual underlining by means of line drawing can
 *   be done in a pinch).
 */
static void init_fonts(int pick_width) {
    TEXTMETRIC tm;
    int i;
    int fsize[8];
    HDC hdc;
    int fw_dontcare, fw_bold;
    int firstchar = ' ';

#ifdef CHECKOEMFONT
font_messup:
#endif
    for (i=0; i<8; i++)
        fonts[i] = NULL;

    if (cfg.fontisbold) {
        fw_dontcare = FW_BOLD;
        fw_bold = FW_BLACK;
   } else {
        fw_dontcare = FW_DONTCARE;
        fw_bold = FW_BOLD;
    }

    hdc = GetDC(hwnd);

    font_height = cfg.fontheight;
    font_width = pick_width;

#define f(i,c,w,u) \
    fonts[i] = CreateFont (font_height, font_width, 0, 0, w, FALSE, u, FALSE, \
                           c, OUT_DEFAULT_PRECIS, \
                           CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, \
                           FIXED_PITCH | FF_DONTCARE, cfg.font)

    if (cfg.vtmode != VT_OEMONLY) {
        f(FONT_NORMAL, cfg.fontcharset, fw_dontcare, FALSE);

        SelectObject (hdc, fonts[FONT_NORMAL]);
        GetTextMetrics(hdc, &tm); 
        font_height = tm.tmHeight;
        font_width = tm.tmAveCharWidth;

        f(FONT_UNDERLINE, cfg.fontcharset, fw_dontcare, TRUE);

        /*
         * Some fonts, e.g. 9-pt Courier, draw their underlines
         * outside their character cell. We successfully prevent
         * screen corruption by clipping the text output, but then
         * we lose the underline completely. Here we try to work
         * out whether this is such a font, and if it is, we set a
         * flag that causes underlines to be drawn by hand.
         *
         * Having tried other more sophisticated approaches (such
         * as examining the TEXTMETRIC structure or requesting the
         * height of a string), I think we'll do this the brute
         * force way: we create a small bitmap, draw an underlined
         * space on it, and test to see whether any pixels are
         * foreground-coloured. (Since we expect the underline to
         * go all the way across the character cell, we only search
         * down a single column of the bitmap, half way across.)
         */
        {
            HDC und_dc;
            HBITMAP und_bm, und_oldbm;
            int i, gotit;
            COLORREF c;

            und_dc = CreateCompatibleDC(hdc);
            und_bm = CreateCompatibleBitmap(hdc, font_width, font_height);
            und_oldbm = SelectObject(und_dc, und_bm);
            SelectObject(und_dc, fonts[FONT_UNDERLINE]);
            SetTextAlign(und_dc, TA_TOP | TA_LEFT | TA_NOUPDATECP);
            SetTextColor (und_dc, RGB(255,255,255));
            SetBkColor (und_dc, RGB(0,0,0));
            SetBkMode (und_dc, OPAQUE);
            ExtTextOut (und_dc, 0, 0, ETO_OPAQUE, NULL, " ", 1, NULL);
            gotit = FALSE;
            for (i = 0; i < font_height; i++) {
                c = GetPixel(und_dc, font_width/2, i);
                if (c != RGB(0,0,0))
                    gotit = TRUE;
            }
            SelectObject(und_dc, und_oldbm);
            DeleteObject(und_bm);
            DeleteDC(und_dc);
            font_needs_hand_underlining = !gotit;
        }

        if (bold_mode == BOLD_FONT) {
            f(FONT_BOLD, cfg.fontcharset, fw_bold, FALSE);
            f(FONT_BOLDUND, cfg.fontcharset, fw_bold, TRUE);
        }

        if (cfg.vtmode == VT_OEMANSI) {
            f(FONT_OEM, OEM_CHARSET, fw_dontcare, FALSE);
            f(FONT_OEMUND, OEM_CHARSET, fw_dontcare, TRUE);

            if (bold_mode == BOLD_FONT) {
                f(FONT_OEMBOLD, OEM_CHARSET, fw_bold, FALSE);
                f(FONT_OEMBOLDUND, OEM_CHARSET, fw_bold, TRUE);
            }
        }
    }
    else
    {
        f(FONT_OEM, cfg.fontcharset, fw_dontcare, FALSE);

        SelectObject (hdc, fonts[FONT_OEM]);
        GetTextMetrics(hdc, &tm); 
        font_height = tm.tmHeight;
        font_width = tm.tmAveCharWidth;

        f(FONT_OEMUND, cfg.fontcharset, fw_dontcare, TRUE);

        if (bold_mode == BOLD_FONT) {
            f(FONT_BOLD, cfg.fontcharset, fw_bold, FALSE);
            f(FONT_BOLDUND, cfg.fontcharset, fw_bold, TRUE);
        }
    }
#undef f

    descent = tm.tmAscent + 1;
    if (descent >= font_height)
        descent = font_height - 1;
    firstchar = tm.tmFirstChar;

    for (i=0; i<8; i++) {
        if (fonts[i]) {
            if (SelectObject (hdc, fonts[i]) &&
                GetTextMetrics(hdc, &tm) )
                 fsize[i] = tm.tmAveCharWidth + 256 * tm.tmHeight;
            else fsize[i] = -i;
        }
        else fsize[i] = -i;
    }

    ReleaseDC (hwnd, hdc);

    /* ... This is wrong in OEM only mode */
    if (fsize[FONT_UNDERLINE] != fsize[FONT_NORMAL] ||
        (bold_mode == BOLD_FONT &&
         fsize[FONT_BOLDUND] != fsize[FONT_BOLD])) {
        und_mode = UND_LINE;
        DeleteObject (fonts[FONT_UNDERLINE]);
        if (bold_mode == BOLD_FONT)
            DeleteObject (fonts[FONT_BOLDUND]);
    }

    if (bold_mode == BOLD_FONT &&
        fsize[FONT_BOLD] != fsize[FONT_NORMAL]) {
        bold_mode = BOLD_SHADOW;
        DeleteObject (fonts[FONT_BOLD]);
        if (und_mode == UND_FONT)
            DeleteObject (fonts[FONT_BOLDUND]);
    }

#ifdef CHECKOEMFONT
    /* With the fascist font painting it doesn't matter if the linedraw font
     * isn't exactly the right size anymore so we don't have to check this.
     */
    if (cfg.vtmode == VT_OEMANSI && fsize[FONT_OEM] != fsize[FONT_NORMAL] ) {
        if( cfg.fontcharset == OEM_CHARSET )
        {
            MessageBox(NULL, "The OEM and ANSI versions of this font are\n"
                   "different sizes. Using OEM-only mode instead",
                   "Font Size Mismatch", MB_ICONINFORMATION | MB_OK);
            cfg.vtmode = VT_OEMONLY;
        }
        else if( firstchar < ' ' )
        {
            MessageBox(NULL, "The OEM and ANSI versions of this font are\n"
                   "different sizes. Using XTerm mode instead",
                   "Font Size Mismatch", MB_ICONINFORMATION | MB_OK);
            cfg.vtmode = VT_XWINDOWS;
        }
        else
        {
            MessageBox(NULL, "The OEM and ANSI versions of this font are\n"
                   "different sizes. Using ISO8859-1 mode instead",
                   "Font Size Mismatch", MB_ICONINFORMATION | MB_OK);
            cfg.vtmode = VT_POORMAN;
        }

        for (i=0; i<8; i++)
            if (fonts[i])
                DeleteObject (fonts[i]);
        goto font_messup;
    }
#endif
}

void request_resize (int w, int h, int refont) {
    int width, height;

    /* If the window is maximized supress resizing attempts */
    if(IsZoomed(hwnd)) return;
    
#ifdef CHECKOEMFONT
    /* Don't do this in OEMANSI, you may get disable messages */
    if (refont && w != cols && (cols==80 || cols==132)
          && cfg.vtmode != VT_OEMANSI)
#else
    if (refont && w != cols && (cols==80 || cols==132))
#endif
    {
       /* If font width too big for screen should we shrink the font more ? */
        if (w==132)
            font_width = ((font_width*cols+w/2)/w);
        else
            font_width = 0;
        {
            int i;
            for (i=0; i<8; i++)
                if (fonts[i])
                    DeleteObject(fonts[i]);
        }
        bold_mode = cfg.bold_colour ? BOLD_COLOURS : BOLD_FONT;
        und_mode = UND_FONT;
        init_fonts(font_width);
    }
    else
    {
       static int first_time = 1;
       static RECT ss;

       switch(first_time)
       {
       case 1:
             /* Get the size of the screen */
             if (GetClientRect(GetDesktopWindow(),&ss))
                /* first_time = 0 */;
             else { first_time = 2; break; }
       case 0:
             /* Make sure the values are sane */
             width  = (ss.right-ss.left-extra_width  ) / font_width;
             height = (ss.bottom-ss.top-extra_height ) / font_height;

             if (w>width)  w=width;
             if (h>height) h=height;
             if (w<15) w = 15;
             if (h<1) w = 1;
       }
    }

    width = extra_width + font_width * w;
    height = extra_height + font_height * h;

    SetWindowPos (hwnd, NULL, 0, 0, width, height,
                  SWP_NOACTIVATE | SWP_NOCOPYBITS |
                  SWP_NOMOVE | SWP_NOZORDER);
}

static void click (Mouse_Button b, int x, int y) {
    int thistime = GetMessageTime();

    if (lastbtn == b && thistime - lasttime < dbltime) {
        lastact = (lastact == MA_CLICK ? MA_2CLK :
                   lastact == MA_2CLK ? MA_3CLK :
                   lastact == MA_3CLK ? MA_CLICK : MA_NOTHING);
    } else {
        lastbtn = b;
        lastact = MA_CLICK;
    }
    if (lastact != MA_NOTHING)
        term_mouse (b, lastact, x, y);
    lasttime = thistime;
}

static LRESULT CALLBACK WndProc (HWND hwnd, UINT message,
                                 WPARAM wParam, LPARAM lParam) {
    HDC hdc;
    static int ignore_size = FALSE;
    static int ignore_clip = FALSE;
    static int ignore_keymenu = TRUE;
    static int just_reconfigged = FALSE;

    switch (message) {
      case WM_TIMER:
        if (pending_netevent)
            enact_pending_netevent();
        if (inbuf_head)
            term_out();
        term_update();
        return 0;
      case WM_CREATE:
        break;
      case WM_CLOSE:
        if (!cfg.warn_on_close || session_closed ||
            MessageBox(hwnd, "Are you sure you want to close this session?",
                       "PuTTY Exit Confirmation",
                       MB_ICONWARNING | MB_OKCANCEL) == IDOK)
            DestroyWindow(hwnd);
        return 0;
      case WM_DESTROY:
        PostQuitMessage (0);
        return 0;
      case WM_SYSCOMMAND:
        switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
          case SC_KEYMENU:
            if (ignore_keymenu)
                return 0;              /* don't put up system menu on Alt */
            break;
          case IDM_SHOWLOG:
            showeventlog(hwnd);
            break;
          case IDM_NEWSESS:
          case IDM_DUPSESS:
          case IDM_SAVEDSESS:
            {
                char b[2048];
                char c[30], *cl;
                int freecl = FALSE;
                STARTUPINFO si;
                PROCESS_INFORMATION pi;
                HANDLE filemap = NULL;

                if (wParam == IDM_DUPSESS) {
                    /*
                     * Allocate a file-mapping memory chunk for the
                     * config structure.
                     */
                    SECURITY_ATTRIBUTES sa;
                    Config *p;

                    sa.nLength = sizeof(sa);
                    sa.lpSecurityDescriptor = NULL;
                    sa.bInheritHandle = TRUE;
                    filemap = CreateFileMapping((HANDLE)0xFFFFFFFF,
                                                &sa,
                                                PAGE_READWRITE,
                                                0,
                                                sizeof(Config),
                                                NULL);
                    if (filemap) {
                        p = (Config *)MapViewOfFile(filemap,
                                                    FILE_MAP_WRITE,
                                                    0, 0, sizeof(Config));
                        if (p) {
                            *p = cfg;  /* structure copy */
                            UnmapViewOfFile(p);
                        }
                    }
                    sprintf(c, "putty &%p", filemap);
                    cl = c;
                } else if (wParam == IDM_SAVEDSESS) {
                    char *session = sessions[(lParam - IDM_SAVED_MIN) / 16];
                    cl = malloc(16 + strlen(session)); /* 8, but play safe */
                    if (!cl)
                        cl = NULL;     /* not a very important failure mode */
                    else {
                        sprintf(cl, "putty @%s", session);
                        freecl = TRUE;
                    }
                } else
                    cl = NULL;

                GetModuleFileName (NULL, b, sizeof(b)-1);
                si.cb = sizeof(si);
                si.lpReserved = NULL;
                si.lpDesktop = NULL;
                si.lpTitle = NULL;
                si.dwFlags = 0;
                si.cbReserved2 = 0;
                si.lpReserved2 = NULL;
                CreateProcess (b, cl, NULL, NULL, TRUE,
                               NORMAL_PRIORITY_CLASS, NULL, NULL, &si, &pi);

                if (filemap)
                    CloseHandle(filemap);
                if (freecl)
                    free(cl);
            }
            break;
          case IDM_RECONF:
            if (!do_reconfig(hwnd))
                break;
            just_reconfigged = TRUE;
            {
                int i;
                for (i=0; i<8; i++)
                    if (fonts[i])
                        DeleteObject(fonts[i]);
            }
            bold_mode = cfg.bold_colour ? BOLD_COLOURS : BOLD_FONT;
            und_mode = UND_FONT;
            init_fonts(0);
            sfree(logpal);
            /* Telnet will change local echo -> remote if the remote asks */
            if (cfg.protocol != PROT_TELNET)
                ldisc = (cfg.ldisc_term ? &ldisc_term : &ldisc_simple);
            if (pal)
                DeleteObject(pal);
            logpal = NULL;
            pal = NULL;
            cfgtopalette();
            init_palette();

            /* Enable or disable the scroll bar, etc */
            {
                LONG nflg, flag = GetWindowLong(hwnd, GWL_STYLE);

                nflg = flag;
                if (cfg.scrollbar) nflg |=  WS_VSCROLL;
                else               nflg &= ~WS_VSCROLL;
                if (cfg.locksize) 
                   nflg &= ~(WS_THICKFRAME|WS_MAXIMIZEBOX);
                else              
                   nflg |= (WS_THICKFRAME|WS_MAXIMIZEBOX);

                if (nflg != flag)
                {
                    RECT cr, wr;

                    SetWindowLong(hwnd, GWL_STYLE, nflg);
                    SendMessage (hwnd, WM_IGNORE_SIZE, 0, 0);
                    SetWindowPos(hwnd, NULL, 0,0,0,0,
                         SWP_NOACTIVATE|SWP_NOCOPYBITS|
                         SWP_NOMOVE|SWP_NOSIZE| SWP_NOZORDER|
                         SWP_FRAMECHANGED);

                    GetWindowRect (hwnd, &wr);
                    GetClientRect (hwnd, &cr);
                    extra_width = wr.right - wr.left - cr.right + cr.left;
                    extra_height = wr.bottom - wr.top - cr.bottom + cr.top;
                }
            }

            term_size(cfg.height, cfg.width, cfg.savelines);
            InvalidateRect(hwnd, NULL, TRUE);
            SetWindowPos (hwnd, NULL, 0, 0,
                          extra_width + font_width * cfg.width,
                          extra_height + font_height * cfg.height,
                          SWP_NOACTIVATE | SWP_NOCOPYBITS |
                          SWP_NOMOVE | SWP_NOZORDER);
            if (IsIconic(hwnd)) {
                SetWindowText (hwnd,
                               cfg.win_name_always ? window_name : icon_name);
            }
            break;
          case IDM_CLRSB:
            term_clrsb();
            break;
          case IDM_RESET:
            term_pwron();
            break;
          case IDM_TEL_AYT: back->special (TS_AYT); break;
          case IDM_TEL_BRK: back->special (TS_BRK); break;
          case IDM_TEL_SYNCH: back->special (TS_SYNCH); break;
          case IDM_TEL_EC: back->special (TS_EC); break;
          case IDM_TEL_EL: back->special (TS_EL); break;
          case IDM_TEL_GA: back->special (TS_GA); break;
          case IDM_TEL_NOP: back->special (TS_NOP); break;
          case IDM_TEL_ABORT: back->special (TS_ABORT); break;
          case IDM_TEL_AO: back->special (TS_AO); break;
          case IDM_TEL_IP: back->special (TS_IP); break;
          case IDM_TEL_SUSP: back->special (TS_SUSP); break;
          case IDM_TEL_EOR: back->special (TS_EOR); break;
          case IDM_TEL_EOF: back->special (TS_EOF); break;
          case IDM_ABOUT:
            showabout (hwnd);
            break;
        default:
          if (wParam >= IDM_SAVED_MIN && wParam <= IDM_SAVED_MAX) {
            SendMessage(hwnd, WM_SYSCOMMAND, IDM_SAVEDSESS, wParam);
          }
        }
        break;

#define X_POS(l) ((int)(short)LOWORD(l))
#define Y_POS(l) ((int)(short)HIWORD(l))

#define TO_CHR_X(x) (((x)<0 ? (x)-font_width+1 : (x)) / font_width)
#define TO_CHR_Y(y) (((y)<0 ? (y)-font_height+1: (y)) / font_height)

      case WM_LBUTTONDOWN:
        click (MB_SELECT, TO_CHR_X(X_POS(lParam)),
               TO_CHR_Y(Y_POS(lParam)));
        SetCapture(hwnd);
        return 0;
      case WM_LBUTTONUP:
        term_mouse (MB_SELECT, MA_RELEASE, TO_CHR_X(X_POS(lParam)),
                    TO_CHR_Y(Y_POS(lParam)));
        ReleaseCapture();
        return 0;
      case WM_MBUTTONDOWN:
        SetCapture(hwnd);
        click (cfg.mouse_is_xterm ? MB_PASTE : MB_EXTEND,
               TO_CHR_X(X_POS(lParam)),
               TO_CHR_Y(Y_POS(lParam)));
        return 0;
      case WM_MBUTTONUP:
        term_mouse (cfg.mouse_is_xterm ? MB_PASTE : MB_EXTEND,
                    MA_RELEASE, TO_CHR_X(X_POS(lParam)),
                    TO_CHR_Y(Y_POS(lParam)));
        ReleaseCapture();
        return 0;
      case WM_RBUTTONDOWN:
        SetCapture(hwnd);
        click (cfg.mouse_is_xterm ? MB_EXTEND : MB_PASTE,
               TO_CHR_X(X_POS(lParam)),
               TO_CHR_Y(Y_POS(lParam)));
        return 0;
      case WM_RBUTTONUP:
        term_mouse (cfg.mouse_is_xterm ? MB_EXTEND : MB_PASTE,
                    MA_RELEASE, TO_CHR_X(X_POS(lParam)),
                    TO_CHR_Y(Y_POS(lParam)));
        ReleaseCapture();
        return 0;
      case WM_MOUSEMOVE:
        /*
         * Add the mouse position and message time to the random
         * number noise, if we're using ssh.
         */
        if (cfg.protocol == PROT_SSH)
            noise_ultralight(lParam);

        if (wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)) {
            Mouse_Button b;
            if (wParam & MK_LBUTTON)
                b = MB_SELECT;
            else if (wParam & MK_MBUTTON)
                b = cfg.mouse_is_xterm ? MB_PASTE : MB_EXTEND;
            else
                b = cfg.mouse_is_xterm ? MB_EXTEND : MB_PASTE;
            term_mouse (b, MA_DRAG, TO_CHR_X(X_POS(lParam)),
                        TO_CHR_Y(Y_POS(lParam)));
        }
        return 0;
      case WM_IGNORE_CLIP:
        ignore_clip = wParam;          /* don't panic on DESTROYCLIPBOARD */
        break;
      case WM_IGNORE_KEYMENU:
        ignore_keymenu = wParam;       /* do or don't ignore SC_KEYMENU */
        break;
      case WM_DESTROYCLIPBOARD:
        if (!ignore_clip)
            term_deselect();
        ignore_clip = FALSE;
        return 0;
      case WM_PAINT:
        {
            PAINTSTRUCT p;
            hdc = BeginPaint (hwnd, &p);
            if (pal) {
                SelectPalette (hdc, pal, TRUE);
                RealizePalette (hdc);
            }
            term_paint (hdc, p.rcPaint.left, p.rcPaint.top,
                        p.rcPaint.right, p.rcPaint.bottom);
            SelectObject (hdc, GetStockObject(SYSTEM_FONT));
            SelectObject (hdc, GetStockObject(WHITE_PEN));
            EndPaint (hwnd, &p);
        }
        return 0;
      case WM_NETEVENT:
        /* Notice we can get multiple netevents, FD_READ, FD_WRITE etc
         * but the only one that's likely to try to overload us is FD_READ.
         * This means buffering just one is fine.
         */
        if (pending_netevent)
            enact_pending_netevent();

        pending_netevent = TRUE;
        pend_netevent_wParam=wParam;
        pend_netevent_lParam=lParam;
        return 0;
      case WM_SETFOCUS:
        has_focus = TRUE;
        term_out();
        term_update();
        break;
      case WM_KILLFOCUS:
        has_focus = FALSE;
        term_out();
        term_update();
        break;
      case WM_IGNORE_SIZE:
        ignore_size = TRUE;            /* don't panic on next WM_SIZE msg */
        break;
      case WM_ENTERSIZEMOVE:
        EnableSizeTip(1);
        break;
      case WM_EXITSIZEMOVE:
        EnableSizeTip(0);
        break;
      case WM_SIZING:
        {
            int width, height, w, h, ew, eh;
            LPRECT r = (LPRECT)lParam;

            width = r->right - r->left - extra_width;
            height = r->bottom - r->top - extra_height;
            w = (width + font_width/2) / font_width; if (w < 1) w = 1;
            h = (height + font_height/2) / font_height; if (h < 1) h = 1;
            UpdateSizeTip(hwnd, w, h);
            ew = width - w * font_width;
            eh = height - h * font_height;
            if (ew != 0) {
                if (wParam == WMSZ_LEFT ||
                    wParam == WMSZ_BOTTOMLEFT ||
                    wParam == WMSZ_TOPLEFT)
                    r->left += ew;
                else
                    r->right -= ew;
            }
            if (eh != 0) {
                if (wParam == WMSZ_TOP ||
                    wParam == WMSZ_TOPRIGHT ||
                    wParam == WMSZ_TOPLEFT)
                    r->top += eh;
                else
                    r->bottom -= eh;
            }
            if (ew || eh)
                return 1;
            else
                return 0;
        }
        /* break;  (never reached) */
      case WM_SIZE:
        if (wParam == SIZE_MINIMIZED) {
            SetWindowText (hwnd,
                           cfg.win_name_always ? window_name : icon_name);
            break;
        }
        if (wParam == SIZE_RESTORED || wParam == SIZE_MAXIMIZED)
            SetWindowText (hwnd, window_name);
        if (!ignore_size) {
            int width, height, w, h;
#if 0 /* we have fixed this using WM_SIZING now */
            int ew, eh;
#endif

            width = LOWORD(lParam);
            height = HIWORD(lParam);
            w = width / font_width; if (w < 1) w = 1;
            h = height / font_height; if (h < 1) h = 1;
#if 0 /* we have fixed this using WM_SIZING now */
            ew = width - w * font_width;
            eh = height - h * font_height;
            if (ew != 0 || eh != 0) {
                RECT r;
                GetWindowRect (hwnd, &r);
                SendMessage (hwnd, WM_IGNORE_SIZE, 0, 0);
                SetWindowPos (hwnd, NULL, 0, 0,
                              r.right - r.left - ew, r.bottom - r.top - eh,
                              SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOZORDER);
            }
#endif
            if (w != cols || h != rows || just_reconfigged) {
                term_invalidate();
                term_size (h, w, cfg.savelines);
                back->size();
                just_reconfigged = FALSE;
            }
        }
        ignore_size = FALSE;
        return 0;
      case WM_VSCROLL:
        switch (LOWORD(wParam)) {
          case SB_BOTTOM: term_scroll(-1, 0); break;
          case SB_TOP: term_scroll(+1, 0); break;
          case SB_LINEDOWN: term_scroll (0, +1); break;
          case SB_LINEUP: term_scroll (0, -1); break;
          case SB_PAGEDOWN: term_scroll (0, +rows/2); break;
          case SB_PAGEUP: term_scroll (0, -rows/2); break;
          case SB_THUMBPOSITION: case SB_THUMBTRACK:
            term_scroll (1, HIWORD(wParam)); break;
        }
        break; 
     case WM_PALETTECHANGED:
        if ((HWND) wParam != hwnd && pal != NULL) {
            HDC hdc = get_ctx();
            if (hdc) {
                if (RealizePalette (hdc) > 0)
                    UpdateColors (hdc);
                free_ctx (hdc);
            }
        }
        break;
      case WM_QUERYNEWPALETTE:
        if (pal != NULL) {
            HDC hdc = get_ctx();
            if (hdc) {
                if (RealizePalette (hdc) > 0)
                    UpdateColors (hdc);
                free_ctx (hdc);
                return TRUE;
            }
        }
        return FALSE;
      case WM_KEYDOWN:
      case WM_SYSKEYDOWN:
      case WM_KEYUP:
      case WM_SYSKEYUP:
        /*
         * Add the scan code and keypress timing to the random
         * number noise, if we're using ssh.
         */
        if (cfg.protocol == PROT_SSH)
            noise_ultralight(lParam);

        /*
         * We don't do TranslateMessage since it disassociates the
         * resulting CHAR message from the KEYDOWN that sparked it,
         * which we occasionally don't want. Instead, we process
         * KEYDOWN, and call the Win32 translator functions so that
         * we get the translations under _our_ control.
         */
        {
            unsigned char buf[20];
            int len;

            len = TranslateKey (message, wParam, lParam, buf);
            if (len == -1)
                return DefWindowProc (hwnd, message, wParam, lParam);
            ldisc->send (buf, len);
        }
        return 0;
      case WM_CHAR:
      case WM_SYSCHAR:
        /*
         * Nevertheless, we are prepared to deal with WM_CHAR
         * messages, should they crop up. So if someone wants to
         * post the things to us as part of a macro manoeuvre,
         * we're ready to cope.
         */
        {
            char c = xlat_kbd2tty((unsigned char)wParam);
            ldisc->send (&c, 1);
        }
        return 0;
    }

    return DefWindowProc (hwnd, message, wParam, lParam);
}

/*
 * Draw a line of text in the window, at given character
 * coordinates, in given attributes.
 *
 * We are allowed to fiddle with the contents of `text'.
 */
void do_text (Context ctx, int x, int y, char *text, int len,
              unsigned long attr, int lattr) {
    COLORREF fg, bg, t;
    int nfg, nbg, nfont;
    HDC hdc = ctx;
    RECT line_box;
    int force_manual_underline = 0;
    int fnt_width = font_width*(1+(lattr!=LATTR_NORM));
    static int *IpDx = 0, IpDxLEN = 0;;

    if (len>IpDxLEN || IpDx[0] != fnt_width) {
        int i;
        if (len>IpDxLEN) {
            sfree(IpDx);
            IpDx = smalloc((len+16)*sizeof(int));
            IpDxLEN = (len+16);
        }
        for(i=0; i<IpDxLEN; i++)
            IpDx[i] = fnt_width;
    }

    x *= fnt_width;
    y *= font_height;

    if (attr & ATTR_ACTCURS) {
        attr &= (bold_mode == BOLD_COLOURS ? 0x300200 : 0x300300);
        attr ^= ATTR_CUR_XOR;
    }

    nfont = 0;
    if (cfg.vtmode == VT_OEMONLY)
        nfont |= FONT_OEM;

    /*
     * Map high-half characters in order to approximate ISO using
     * OEM character set. No characters are missing if the OEM codepage
     * is CP850.
     */
    if (nfont & FONT_OEM) {
        int i;
        for (i=0; i<len; i++)
            if (text[i] >= '\xA0' && text[i] <= '\xFF') {
#if 0
                /* This is CP850 ... perfect translation */
                static const char oemhighhalf[] =
                    "\x20\xAD\xBD\x9C\xCF\xBE\xDD\xF5" /* A0-A7 */
                    "\xF9\xB8\xA6\xAE\xAA\xF0\xA9\xEE" /* A8-AF */
                    "\xF8\xF1\xFD\xFC\xEF\xE6\xF4\xFA" /* B0-B7 */
                    "\xF7\xFB\xA7\xAF\xAC\xAB\xF3\xA8" /* B8-BF */
                    "\xB7\xB5\xB6\xC7\x8E\x8F\x92\x80" /* C0-C7 */
                    "\xD4\x90\xD2\xD3\xDE\xD6\xD7\xD8" /* C8-CF */
                    "\xD1\xA5\xE3\xE0\xE2\xE5\x99\x9E" /* D0-D7 */
                    "\x9D\xEB\xE9\xEA\x9A\xED\xE8\xE1" /* D8-DF */
                    "\x85\xA0\x83\xC6\x84\x86\x91\x87" /* E0-E7 */
                    "\x8A\x82\x88\x89\x8D\xA1\x8C\x8B" /* E8-EF */
                    "\xD0\xA4\x95\xA2\x93\xE4\x94\xF6" /* F0-F7 */
                    "\x9B\x97\xA3\x96\x81\xEC\xE7\x98" /* F8-FF */
                    ;
#endif
                /* This is CP437 ... junk translation */
                static const unsigned char oemhighhalf[] = {
                    0xff, 0xad, 0x9b, 0x9c, 0x6f, 0x9d, 0x7c, 0x15,
                    0x22, 0x43, 0xa6, 0xae, 0xaa, 0x2d, 0x52, 0xc4,
                    0xf8, 0xf1, 0xfd, 0x33, 0x27, 0xe6, 0x14, 0xfa,
                    0x2c, 0x31, 0xa7, 0xaf, 0xac, 0xab, 0x2f, 0xa8,
                    0x41, 0x41, 0x41, 0x41, 0x8e, 0x8f, 0x92, 0x80,
                    0x45, 0x90, 0x45, 0x45, 0x49, 0x49, 0x49, 0x49,
                    0x44, 0xa5, 0x4f, 0x4f, 0x4f, 0x4f, 0x99, 0x78,
                    0xed, 0x55, 0x55, 0x55, 0x9a, 0x59, 0x50, 0xe1,
                    0x85, 0xa0, 0x83, 0x61, 0x84, 0x86, 0x91, 0x87,
                    0x8a, 0x82, 0x88, 0x89, 0x8d, 0xa1, 0x8c, 0x8b,
                    0x0b, 0xa4, 0x95, 0xa2, 0x93, 0x6f, 0x94, 0xf6,
                    0xed, 0x97, 0xa3, 0x96, 0x81, 0x79, 0x70, 0x98
                };

                text[i] = oemhighhalf[(unsigned char)text[i] - 0xA0];
            }
    }

    if (attr & ATTR_GBCHR) {
        int i;
        /*
         * GB mapping: map # to pound, and everything else stays
         * normal.
         */
        for (i=0; i<len; i++)
            if (text[i] == '#')
                text[i] = cfg.vtmode == VT_OEMONLY ? '\x9C' : '\xA3';
    } else if (attr & ATTR_LINEDRW) {
        int i;
        /* ISO 8859-1 */
        static const char poorman[] =
            "*#****\xB0\xB1**+++++-----++++|****\xA3\xB7";

        /* CP437 */
        static const char oemmap_437[] =
            "\x04\xB1****\xF8\xF1**\xD9\xBF\xDA\xC0\xC5"
            "\xC4\xC4\xC4\xC4\xC4\xC3\xB4\xC1\xC2\xB3\xF3\xF2\xE3*\x9C\xFA";

        /* CP850 */
        static const char oemmap_850[] =
            "\x04\xB1****\xF8\xF1**\xD9\xBF\xDA\xC0\xC5"
            "\xC4\xC4\xC4\xC4\xC4\xC3\xB4\xC1\xC2\xB3****\x9C\xFA";

        /* Poor windows font ... eg: windows courier */
        static const char oemmap[] =
            "*\xB1****\xF8\xF1**\xD9\xBF\xDA\xC0\xC5"
            "\xC4\xC4\xC4\xC4\xC4\xC3\xB4\xC1\xC2\xB3****\x9C\xFA";

        /*
         * Line drawing mapping: map ` thru ~ (0x60 thru 0x7E) to
         * VT100 line drawing chars; everything else stays normal.
         */
        switch (cfg.vtmode) {
          case VT_XWINDOWS:
            for (i=0; i<len; i++)
                if (text[i] >= '\x60' && text[i] <= '\x7E')
                    text[i] += '\x01' - '\x60';
            break;
          case VT_OEMANSI:
            /* Make sure we actually have an OEM font */
            if (fonts[nfont|FONT_OEM]) { 
          case VT_OEMONLY:
                nfont |= FONT_OEM;
                for (i=0; i<len; i++)
                    if (text[i] >= '\x60' && text[i] <= '\x7E')
                        text[i] = oemmap[(unsigned char)text[i] - 0x60];
                break;
            }
          case VT_POORMAN:
            for (i=0; i<len; i++)
                if (text[i] >= '\x60' && text[i] <= '\x7E')
                    text[i] = poorman[(unsigned char)text[i] - 0x60];
            break;
        }
    }

    nfg = 2 * ((attr & ATTR_FGMASK) >> ATTR_FGSHIFT);
    nbg = 2 * ((attr & ATTR_BGMASK) >> ATTR_BGSHIFT);
    if (bold_mode == BOLD_FONT && (attr & ATTR_BOLD))
        nfont |= FONT_BOLD;
    if (und_mode == UND_FONT && (attr & ATTR_UNDER))
        nfont |= FONT_UNDERLINE;
    if (!fonts[nfont]) 
    {
        if (nfont&FONT_UNDERLINE)
            force_manual_underline = 1;
        /* Don't do the same for manual bold, it could be bad news. */

        nfont &= ~(FONT_BOLD|FONT_UNDERLINE);
    }
    if (font_needs_hand_underlining && (attr & ATTR_UNDER))
        force_manual_underline = 1;
    if (attr & ATTR_REVERSE) {
        t = nfg; nfg = nbg; nbg = t;
    }
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BOLD))
        nfg++;
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BLINK))
        nbg++;
    fg = colours[nfg];
    bg = colours[nbg];
    SelectObject (hdc, fonts[nfont]);
    SetTextColor (hdc, fg);
    SetBkColor (hdc, bg);
    SetBkMode (hdc, OPAQUE);
    line_box.left   = x;
    line_box.top    = y;
    line_box.right  = x+fnt_width*len;
    line_box.bottom = y+font_height;
    ExtTextOut (hdc, x, y, ETO_CLIPPED|ETO_OPAQUE, &line_box, text, len, IpDx);
    if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
        SetBkMode (hdc, TRANSPARENT);

       /* GRR: This draws the character outside it's box and can leave
        * 'droppings' even with the clip box! I suppose I could loop it
        * one character at a time ... yuk. 
        * 
        * Or ... I could do a test print with "W", and use +1 or -1 for this
        * shift depending on if the leftmost column is blank...
        */
        ExtTextOut (hdc, x-1, y, ETO_CLIPPED, &line_box, text, len, IpDx);
    }
    if (force_manual_underline || 
            (und_mode == UND_LINE && (attr & ATTR_UNDER))) {
        HPEN oldpen;
        oldpen = SelectObject (hdc, CreatePen(PS_SOLID, 0, fg));
        MoveToEx (hdc, x, y+descent, NULL);
        LineTo (hdc, x+len*fnt_width, y+descent);
        oldpen = SelectObject (hdc, oldpen);
        DeleteObject (oldpen);
    }
    if (attr & ATTR_PASCURS) {
        POINT pts[5];
        HPEN oldpen;
        pts[0].x = pts[1].x = pts[4].x = x;
        pts[2].x = pts[3].x = x+fnt_width-1;
        pts[0].y = pts[3].y = pts[4].y = y;
        pts[1].y = pts[2].y = y+font_height-1;
        oldpen = SelectObject (hdc, CreatePen(PS_SOLID, 0, colours[23]));
        Polyline (hdc, pts, 5);
        oldpen = SelectObject (hdc, oldpen);
        DeleteObject (oldpen);
    }
}

static int check_compose(int first, int second) {

    static char * composetbl[] = {
       "++#", "AA@", "(([", "//\\", "))]", "(-{", "-)}", "/^|", "!!¡", "C/¢",
       "C|¢", "L-£", "L=£", "XO¤", "X0¤", "Y-¥", "Y=¥", "||¦", "SO§", "S!§",
       "S0§", "\"\"¨", "CO©", "C0©", "A_ª", "<<«", ",-¬", "--­", "RO®",
       "-^¯", "0^°", "+-±", "2^²", "3^³", "''´", "/Uµ", "P!¶", ".^·", ",,¸",
       "1^¹", "O_º", ">>»", "14¼", "12½", "34¾", "??¿", "`AÀ", "'AÁ", "^AÂ",
       "~AÃ", "\"AÄ", "*AÅ", "AEÆ", ",CÇ", "`EÈ", "'EÉ", "^EÊ", "\"EË",
       "`IÌ", "'IÍ", "^IÎ", "\"IÏ", "-DÐ", "~NÑ", "`OÒ", "'OÓ", "^OÔ",
       "~OÕ", "\"OÖ", "XX×", "/OØ", "`UÙ", "'UÚ", "^UÛ", "\"UÜ", "'YÝ",
       "HTÞ", "ssß", "`aà", "'aá", "^aâ", "~aã", "\"aä", "*aå", "aeæ", ",cç",
       "`eè", "'eé", "^eê", "\"eë", "`iì", "'ií", "^iî", "\"iï", "-dð", "~nñ",
       "`oò", "'oó", "^oô", "~oõ", "\"oö", ":-÷", "o/ø", "`uù", "'uú", "^uû",
       "\"uü", "'yý", "htþ", "\"yÿ",
    0};

    char ** c;
    static int recurse = 0;
    int nc = -1;

    if(0)
    {
        char buf[256];
        char * p;
        sprintf(buf, "cc(%d,%d)", first, second);
        for(p=buf; *p; p++)
            c_write1(*p);
    }

    for(c=composetbl; *c; c++) {
        if( (*c)[0] == first && (*c)[1] == second)
        {
            return (*c)[2] & 0xFF;
        }
    }

    if(recurse==0)
    {
        recurse=1;
        nc = check_compose(second, first);
        if(nc == -1)
            nc = check_compose(toupper(first), toupper(second));
        if(nc == -1)
            nc = check_compose(toupper(second), toupper(first));
        recurse=0;
    }
    return nc;
}


/*
 * Translate a WM_(SYS)?KEY(UP|DOWN) message into a string of ASCII
 * codes. Returns number of bytes used or zero to drop the message
 * or -1 to forward the message to windows.
 */
static int TranslateKey(UINT message, WPARAM wParam, LPARAM lParam, unsigned char *output) {
    BYTE keystate[256];
    int  scan, left_alt = 0, key_down, shift_state;
    int  r, i, code;
    unsigned char * p = output;

static WORD keys[3];
static int compose_state = 0;
static int compose_char = 0;
static WPARAM compose_key = 0;

    r = GetKeyboardState(keystate);
    if (!r) memset(keystate, 0, sizeof(keystate));
    else
    {
        /* Note if AltGr was pressed and if it was used as a compose key */
        if (wParam == VK_MENU && (HIWORD(lParam)&KF_EXTENDED))
        {
            keystate[VK_RMENU] = keystate[VK_MENU];
            if (!compose_state) compose_key = wParam;
        }
        if (wParam == VK_APPS && !compose_state)
            compose_key = wParam;

        if (wParam == compose_key)
        {
            if (compose_state == 0 && (HIWORD(lParam)&(KF_UP|KF_REPEAT))==0)
               compose_state = 1;
            else if (compose_state == 1 && (HIWORD(lParam)&KF_UP))
               compose_state = 2;
            else
               compose_state = 0;
        }
        else if (compose_state==1 && wParam != VK_CONTROL)
           compose_state = 0;

        /* Nastyness with NUMLock - Shift-NUMLock is left alone though */
        if ( (cfg.funky_type == 0 || (cfg.funky_type == 1 && app_keypad_keys))
              && wParam==VK_NUMLOCK && !(keystate[VK_SHIFT]&0x80)) {

            wParam = VK_EXECUTE;

            /* UnToggle NUMLock */
            if ((HIWORD(lParam)&(KF_UP|KF_REPEAT))==0)
                keystate[VK_NUMLOCK] ^= 1;
        }

        /* And write back the 'adjusted' state */
        SetKeyboardState (keystate);
    }

    /* Disable Auto repeat if required */
    if (repeat_off && (HIWORD(lParam)&(KF_UP|KF_REPEAT))==KF_REPEAT)
       return 0;

    if ((HIWORD(lParam)&KF_ALTDOWN) && (keystate[VK_RMENU]&0x80) == 0)
        left_alt = 1;

    key_down = ((HIWORD(lParam)&KF_UP)==0);

    /* Make sure Ctrl-ALT is not the same as AltGr for ToAscii */
    if (left_alt && (keystate[VK_CONTROL]&0x80))
        keystate[VK_MENU] = 0;

    scan = (HIWORD(lParam) & (KF_UP | KF_EXTENDED | 0xFF));
    shift_state = ((keystate[VK_SHIFT]&0x80)!=0)
                + ((keystate[VK_CONTROL]&0x80)!=0)*2;

    /* 
     * Record that we pressed key so the scroll window can be reset, but
     * be careful to avoid Shift-UP/Down
     */
    if( wParam != VK_SHIFT && wParam != VK_PRIOR && wParam != VK_NEXT ) {
        seen_key_event = 1; 
    }

    /* Make sure we're not pasting */
    if (key_down) term_nopaste();

    if (compose_state>1 && left_alt) compose_state = 0;

    /* Sanitize the number pad if not using a PC NumPad */
    if( left_alt || (app_keypad_keys && cfg.funky_type != 2)
          || cfg.nethack_keypad || compose_state )
    {
        if ((HIWORD(lParam)&KF_EXTENDED) == 0)
        {
            int nParam = 0;
            switch(wParam)
            {
            case VK_INSERT:     nParam = VK_NUMPAD0; break;
            case VK_END:        nParam = VK_NUMPAD1; break;
            case VK_DOWN:       nParam = VK_NUMPAD2; break;
            case VK_NEXT:       nParam = VK_NUMPAD3; break;
            case VK_LEFT:       nParam = VK_NUMPAD4; break;
            case VK_CLEAR:      nParam = VK_NUMPAD5; break;
            case VK_RIGHT:      nParam = VK_NUMPAD6; break;
            case VK_HOME:       nParam = VK_NUMPAD7; break;
            case VK_UP:         nParam = VK_NUMPAD8; break;
            case VK_PRIOR:      nParam = VK_NUMPAD9; break;
            case VK_DELETE:     nParam = VK_DECIMAL; break;
            }
            if (nParam)
            {
                if (keystate[VK_NUMLOCK]&1) shift_state |= 1;
                wParam = nParam;
            }
        }
    }

    /* If a key is pressed and AltGr is not active */
    if (key_down && (keystate[VK_RMENU]&0x80) == 0 && !compose_state)
    {
        /* Okay, prepare for most alts then ...*/
        if (left_alt) *p++ = '\033';

        /* Lets see if it's a pattern we know all about ... */
        if (wParam == VK_PRIOR && shift_state == 1) {
            SendMessage (hwnd, WM_VSCROLL, SB_PAGEUP, 0);
            return 0;
        }
        if (wParam == VK_NEXT && shift_state == 1) {
            SendMessage (hwnd, WM_VSCROLL, SB_PAGEDOWN, 0);
            return 0;
        }
        if (left_alt && wParam == VK_F4 && cfg.alt_f4) {
            return -1;
        }
        if (left_alt && wParam == VK_SPACE && cfg.alt_space) {
            
            SendMessage (hwnd, WM_IGNORE_KEYMENU, FALSE, 0);
            SendMessage (hwnd, WM_SYSCOMMAND, SC_KEYMENU, 0);
            SendMessage (hwnd, WM_IGNORE_KEYMENU, TRUE, 0);
            return -1;
        }

        /* Nethack keypad */
        if (cfg.nethack_keypad && !left_alt) {
           switch(wParam) {
               case VK_NUMPAD1: *p++ = shift_state ? 'B': 'b'; return p-output;
               case VK_NUMPAD2: *p++ = shift_state ? 'J': 'j'; return p-output;
               case VK_NUMPAD3: *p++ = shift_state ? 'N': 'n'; return p-output;
               case VK_NUMPAD4: *p++ = shift_state ? 'H': 'h'; return p-output;
               case VK_NUMPAD5: *p++ = shift_state ? '.': '.'; return p-output;
               case VK_NUMPAD6: *p++ = shift_state ? 'L': 'l'; return p-output;
               case VK_NUMPAD7: *p++ = shift_state ? 'Y': 'y'; return p-output;
               case VK_NUMPAD8: *p++ = shift_state ? 'K': 'k'; return p-output;
               case VK_NUMPAD9: *p++ = shift_state ? 'U': 'u'; return p-output;
           }
        }

        /* Application Keypad */
        if (!left_alt) {
           int xkey = 0;

           if ( cfg.funky_type == 0 ||
              ( cfg.funky_type == 1 && app_keypad_keys)) switch(wParam) {
               case VK_EXECUTE: if (app_keypad_keys) xkey = 'P'; break;
               case VK_DIVIDE:  xkey = 'Q'; break;
               case VK_MULTIPLY:xkey = 'R'; break;
               case VK_SUBTRACT:xkey = 'S'; break;
           }
           if(app_keypad_keys) switch(wParam) {
               case VK_NUMPAD0: xkey = 'p'; break;
               case VK_NUMPAD1: xkey = 'q'; break;
               case VK_NUMPAD2: xkey = 'r'; break;
               case VK_NUMPAD3: xkey = 's'; break;
               case VK_NUMPAD4: xkey = 't'; break;
               case VK_NUMPAD5: xkey = 'u'; break;
               case VK_NUMPAD6: xkey = 'v'; break;
               case VK_NUMPAD7: xkey = 'w'; break;
               case VK_NUMPAD8: xkey = 'x'; break;
               case VK_NUMPAD9: xkey = 'y'; break;

               case VK_DECIMAL: xkey = 'n'; break;
               case VK_ADD:     if(shift_state) xkey = 'm'; 
                                else            xkey = 'l';
                                break;
               case VK_RETURN:
                                if (HIWORD(lParam)&KF_EXTENDED)
                                    xkey = 'M';
                                break;
            }
            if(xkey)
            {
                if (vt52_mode)
                {
                    if (xkey>='P' && xkey<='S')
                        p += sprintf((char *)p, "\x1B%c", xkey); 
                    else
                        p += sprintf((char *)p, "\x1B?%c", xkey); 
                }
                else 
                    p += sprintf((char *)p, "\x1BO%c", xkey); 
                return p - output;
            }
        }

        if (wParam == VK_BACK && shift_state == 0 )     /* Backspace */
        {
            *p++ = (cfg.bksp_is_delete ? 0x7F : 0x08);
            return p-output;
        }
        if (wParam == VK_TAB && shift_state == 1 )      /* Shift tab */
        {
            *p++ = 0x1B; *p++ = '['; *p++ = 'Z'; return p - output;
        }
        if (wParam == VK_SPACE && shift_state == 2 )    /* Ctrl-Space */
        {
            *p++ = 0; return p - output;
        }
        if (wParam == VK_SPACE && shift_state == 3 )    /* Ctrl-Shift-Space */
        {
            *p++ = 160; return p - output;
        }
        if (wParam == VK_CANCEL && shift_state == 2 )   /* Ctrl-Break */
        {
            *p++ = 3; return p - output;
        }
        /* Control-2 to Control-8 are special */
        if (shift_state == 2 && wParam >= '2' && wParam <= '8')
        {
            *p++ = "\000\033\034\035\036\037\177"[wParam-'2'];
            return p - output;
        }
        if (shift_state == 2 && wParam == 0xBD) {
            *p++ = 0x1F;
            return p - output;
        }
        if (shift_state == 2 && wParam == 0xDF) {
            *p++ = 0x1C;
            return p - output;
        }
        if (shift_state == 0 && wParam == VK_RETURN && cr_lf_return) {
            *p++ = '\r'; *p++ = '\n';
            return p - output;
        }

        /*
         * Next, all the keys that do tilde codes. (ESC '[' nn '~',
         * for integer decimal nn.)
         *
         * We also deal with the weird ones here. Linux VCs replace F1
         * to F5 by ESC [ [ A to ESC [ [ E. rxvt doesn't do _that_, but
         * does replace Home and End (1~ and 4~) by ESC [ H and ESC O w
         * respectively.
         */
        code = 0;
        switch (wParam) {
          case VK_F1: code = (keystate[VK_SHIFT] & 0x80 ? 23 : 11); break;
          case VK_F2: code = (keystate[VK_SHIFT] & 0x80 ? 24 : 12); break;
          case VK_F3: code = (keystate[VK_SHIFT] & 0x80 ? 25 : 13); break;
          case VK_F4: code = (keystate[VK_SHIFT] & 0x80 ? 26 : 14); break;
          case VK_F5: code = (keystate[VK_SHIFT] & 0x80 ? 28 : 15); break;
          case VK_F6: code = (keystate[VK_SHIFT] & 0x80 ? 29 : 17); break;
          case VK_F7: code = (keystate[VK_SHIFT] & 0x80 ? 31 : 18); break;
          case VK_F8: code = (keystate[VK_SHIFT] & 0x80 ? 32 : 19); break;
          case VK_F9: code = (keystate[VK_SHIFT] & 0x80 ? 33 : 20); break;
          case VK_F10: code = (keystate[VK_SHIFT] & 0x80 ? 34 : 21); break;
          case VK_F11: code = 23; break;
          case VK_F12: code = 24; break;
          case VK_F13: code = 25; break;
          case VK_F14: code = 26; break;
          case VK_F15: code = 28; break;
          case VK_F16: code = 29; break;
          case VK_F17: code = 31; break;
          case VK_F18: code = 32; break;
          case VK_F19: code = 33; break;
          case VK_F20: code = 34; break;
          case VK_HOME: code = 1; break;
          case VK_INSERT: code = 2; break;
          case VK_DELETE: code = 3; break;
          case VK_END: code = 4; break;
          case VK_PRIOR: code = 5; break;
          case VK_NEXT: code = 6; break;
        }
        if (cfg.funky_type == 1 && code >= 11 && code <= 15) {
            p += sprintf((char *)p, "\x1B[[%c", code + 'A' - 11);
            return p - output;
        }
        if (cfg.funky_type == 2 && code >= 11 && code <= 14) {
            p += sprintf((char *)p, "\x1BO%c", code + 'P' - 11);
            return p - output;
        }
        if (cfg.rxvt_homeend && (code == 1 || code == 4)) {
            p += sprintf((char *)p, code == 1 ? "\x1B[H" : "\x1BOw");
            return p - output;
        }
        if (code) {
            p += sprintf((char *)p, "\x1B[%d~", code);
            return p - output;
        }

        /*
         * Now the remaining keys (arrows and Keypad 5. Keypad 5 for
         * some reason seems to send VK_CLEAR to Windows...).
         */
        {
            char xkey = 0;
            switch (wParam) {
                case VK_UP:     xkey = 'A'; break;
                case VK_DOWN:   xkey = 'B'; break;
                case VK_RIGHT:  xkey = 'C'; break;
                case VK_LEFT:   xkey = 'D'; break;
                case VK_CLEAR:  xkey = 'G'; break;
            }
            if (xkey)
            {
                if (vt52_mode)
                    p += sprintf((char *)p, "\x1B%c", xkey);
                else if (app_cursor_keys)
                    p += sprintf((char *)p, "\x1BO%c", xkey);
                else
                    p += sprintf((char *)p, "\x1B[%c", xkey);
                return p - output;
            }
        }
    }

    /* Okay we've done everything interesting; let windows deal with 
     * the boring stuff */
    {
        BOOL capsOn=keystate[VK_CAPITAL] !=0;

        /* helg: clear CAPS LOCK state if caps lock switches to cyrillic */
        if(cfg.xlat_capslockcyr)
            keystate[VK_CAPITAL] = 0;

        r = ToAscii (wParam, scan, keystate, keys, 0);
        if(r>0)
        {
            p = output;
            for(i=0; i<r; i++)
            {
                unsigned char ch = (unsigned char)keys[i];

                if (compose_state==2 && (ch&0x80) == 0 && ch>' ') {
                    compose_char = ch;
                    compose_state ++;
                    continue;
                }
                if (compose_state==3 && (ch&0x80) == 0 && ch>' ') {
                    int nc;
                    compose_state = 0;

                    if ((nc=check_compose(compose_char,ch)) == -1)
                    {
                        c_write1('\007');
                        return 0;
                    }
                    *p++ = xlat_kbd2tty((unsigned char)nc);
                    return p-output;
                }

                compose_state = 0;

                if( left_alt && key_down ) *p++ = '\033';
                if (!key_down)
                    *p++ = ch;
                else
                {
                    if(capsOn)
                        ch = xlat_latkbd2win(ch);
                    *p++ = xlat_kbd2tty(ch);
                }
            }

            /* This is so the ALT-Numpad and dead keys work correctly. */
            keys[0] = 0;

            return p-output;
        }
    }

    /* This stops ALT press-release doing a 'COMMAND MENU' function */
#if 0
    if (message == WM_SYSKEYUP && wParam == VK_MENU) 
    {
        keystate[VK_MENU] = 0;
        return 0;
    }
#endif

    return -1;
}

void set_title (char *title) {
    sfree (window_name);
    window_name = smalloc(1+strlen(title));
    strcpy (window_name, title);
    if (cfg.win_name_always || !IsIconic(hwnd))
        SetWindowText (hwnd, title);
}

void set_icon (char *title) {
    sfree (icon_name);
    icon_name = smalloc(1+strlen(title));
    strcpy (icon_name, title);
    if (!cfg.win_name_always && IsIconic(hwnd))
        SetWindowText (hwnd, title);
}

void set_sbar (int total, int start, int page) {
    SCROLLINFO si;

    if (!cfg.scrollbar) return;

    si.cbSize = sizeof(si);
    si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
    si.nMin = 0;
    si.nMax = total - 1;
    si.nPage = page;
    si.nPos = start;
    if (hwnd)
        SetScrollInfo (hwnd, SB_VERT, &si, TRUE);
}

Context get_ctx(void) {
    HDC hdc;
    if (hwnd) {
        hdc = GetDC (hwnd);
        if (hdc && pal)
            SelectPalette (hdc, pal, FALSE);
        return hdc;
    } else
        return NULL;
}

void free_ctx (Context ctx) {
    SelectPalette (ctx, GetStockObject (DEFAULT_PALETTE), FALSE);
    ReleaseDC (hwnd, ctx);
}

static void real_palette_set (int n, int r, int g, int b) {
    if (pal) {
        logpal->palPalEntry[n].peRed = r;
        logpal->palPalEntry[n].peGreen = g;
        logpal->palPalEntry[n].peBlue = b;
        logpal->palPalEntry[n].peFlags = PC_NOCOLLAPSE;
        colours[n] = PALETTERGB(r, g, b);
        SetPaletteEntries (pal, 0, NCOLOURS, logpal->palPalEntry);
    } else
        colours[n] = RGB(r, g, b);
}

void palette_set (int n, int r, int g, int b) {
    static const int first[21] = {
        0, 2, 4, 6, 8, 10, 12, 14,
        1, 3, 5, 7, 9, 11, 13, 15,
        16, 17, 18, 20, 22
    };
    real_palette_set (first[n], r, g, b);
    if (first[n] >= 18)
        real_palette_set (first[n]+1, r, g, b);
    if (pal) {
        HDC hdc = get_ctx();
        UnrealizeObject (pal);
        RealizePalette (hdc);
        free_ctx (hdc);
    }
}

void palette_reset (void) {
    int i;

    for (i = 0; i < NCOLOURS; i++) {
        if (pal) {
            logpal->palPalEntry[i].peRed = defpal[i].rgbtRed;
            logpal->palPalEntry[i].peGreen = defpal[i].rgbtGreen;
            logpal->palPalEntry[i].peBlue = defpal[i].rgbtBlue;
            logpal->palPalEntry[i].peFlags = 0;
            colours[i] = PALETTERGB(defpal[i].rgbtRed,
                                    defpal[i].rgbtGreen,
                                    defpal[i].rgbtBlue);
        } else
            colours[i] = RGB(defpal[i].rgbtRed,
                             defpal[i].rgbtGreen,
                             defpal[i].rgbtBlue);
    }

    if (pal) {
        HDC hdc;
        SetPaletteEntries (pal, 0, NCOLOURS, logpal->palPalEntry);
        hdc = get_ctx();
        RealizePalette (hdc);
        free_ctx (hdc);
    }
}

void write_clip (void *data, int len) {
    HGLOBAL clipdata;
    void *lock;

    clipdata = GlobalAlloc (GMEM_DDESHARE | GMEM_MOVEABLE, len + 1);
    if (!clipdata)
        return;
    lock = GlobalLock (clipdata);
    if (!lock)
        return;
    memcpy (lock, data, len);
    ((unsigned char *) lock) [len] = 0;
    GlobalUnlock (clipdata);

    SendMessage (hwnd, WM_IGNORE_CLIP, TRUE, 0);
    if (OpenClipboard (hwnd)) {
        EmptyClipboard();
        SetClipboardData (CF_TEXT, clipdata);
        CloseClipboard();
    } else
        GlobalFree (clipdata);
    SendMessage (hwnd, WM_IGNORE_CLIP, FALSE, 0);
}

void get_clip (void **p, int *len) {
    static HGLOBAL clipdata = NULL;

    if (!p) {
        if (clipdata)
            GlobalUnlock (clipdata);
        clipdata = NULL;
        return;
    } else {
        if (OpenClipboard (NULL)) {
            clipdata = GetClipboardData (CF_TEXT);
            CloseClipboard();
            if (clipdata) {
                *p = GlobalLock (clipdata);
                if (*p) {
                    *len = strlen(*p);
                    return;
                }
            }
        }
    }

    *p = NULL;
    *len = 0;
}

/*
 * Move `lines' lines from position `from' to position `to' in the
 * window.
 */
void optimised_move (int to, int from, int lines) {
    RECT r;
    int min, max;

    min = (to < from ? to : from);
    max = to + from - min;

    r.left = 0; r.right = cols * font_width;
    r.top = min * font_height; r.bottom = (max+lines) * font_height;
    ScrollWindow (hwnd, 0, (to - from) * font_height, &r, &r);
}

/*
 * Print a message box and perform a fatal exit.
 */
void fatalbox(char *fmt, ...) {
    va_list ap;
    char stuff[200];

    va_start(ap, fmt);
    vsprintf(stuff, fmt, ap);
    va_end(ap);
    MessageBox(hwnd, stuff, "PuTTY Fatal Error", MB_ICONERROR | MB_OK);
    exit(1);
}

/*
 * Beep.
 */
void beep(int errorbeep) {
    static long last_beep = 0;
    long now, beep_diff;

    now = GetTickCount();
    beep_diff = now-last_beep;

    /* Make sure we only respond to one beep per packet or so */
    if (beep_diff>=0 && beep_diff<50)
        return;

    if(errorbeep)
       MessageBeep(MB_ICONHAND);
    else
       MessageBeep(MB_OK);

    last_beep = GetTickCount();
}