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window.c

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <assert.h>

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

#ifndef NO_MULTIMON
#if WINVER < 0x0500
#define COMPILE_MULTIMON_STUBS
#include <multimon.h>
#endif
#endif

#include <imm.h>
#include <commctrl.h>
#include <richedit.h>
#include <mmsystem.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_HELP      0x0140
#define IDM_ABOUT     0x0150
#define IDM_SAVEDSESS 0x0160
#define IDM_COPYALL   0x0170
#define IDM_FULLSCREEN  0x0180
#define IDM_PASTE     0x0190

#define IDM_SESSLGP   0x0250         /* log type printable */
#define IDM_SESSLGA   0x0260         /* log type all chars */
#define IDM_SESSLGE   0x0270         /* log end */

#define IDM_SPECIAL_MIN 0x0400
#define IDM_SPECIAL_MAX 0x0800

#define IDM_SAVED_MIN 0x1000
#define IDM_SAVED_MAX 0x2000

#define WM_IGNORE_CLIP (WM_XUSER + 2)
#define WM_FULLSCR_ON_MAX (WM_XUSER + 3)
#define WM_AGENT_CALLBACK (WM_XUSER + 4)

/* Needed for Chinese support and apparently not always defined. */
#ifndef VK_PROCESSKEY
#define VK_PROCESSKEY 0xE5
#endif

/* Mouse wheel support. */
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0x020A         /* not defined in earlier SDKs */
#endif
#ifndef WHEEL_DELTA
#define WHEEL_DELTA 120
#endif

static Mouse_Button translate_button(Mouse_Button button);
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 systopalette(void);
static void init_palette(void);
static void init_fonts(int, int);
static void another_font(int);
static void deinit_fonts(void);
static void set_input_locale(HKL);

static int is_full_screen(void);
static void make_full_screen(void);
static void clear_full_screen(void);
static void flip_full_screen(void);

/* Window layout information */
static void reset_window(int);
static int extra_width, extra_height;
static int font_width, font_height, font_dualwidth;
static int offset_width, offset_height;
static int was_zoomed = 0;
static int prev_rows, prev_cols;
  
static int pending_netevent = 0;
static WPARAM pend_netevent_wParam = 0;
static LPARAM pend_netevent_lParam = 0;
static void enact_pending_netevent(void);
static void flash_window(int mode);
static void sys_cursor_update(void);
static int is_shift_pressed(void);
static int get_fullscreen_rect(RECT * ss);

static time_t last_movement = 0;

static int caret_x = -1, caret_y = -1;

static int kbd_codepage;

static void *ldisc;
static Backend *back;
static void *backhandle;

static struct unicode_data ucsdata;
static int session_closed;

static const struct telnet_special *specials;

static struct {
    HMENU menu;
    int specials_submenu_pos;
} popup_menus[2];
enum { SYSMENU, CTXMENU };

Config cfg;                    /* exported to windlg.c */

extern struct sesslist sesslist;       /* imported from windlg.c */

struct agent_callback {
    void (*callback)(void *, void *, int);
    void *callback_ctx;
    void *data;
    int len;
};

#define FONT_NORMAL 0
#define FONT_BOLD 1
#define FONT_UNDERLINE 2
#define FONT_BOLDUND 3
#define FONT_WIDE 0x04
#define FONT_HIGH 0x08
#define FONT_NARROW     0x10

#define FONT_OEM  0x20
#define FONT_OEMBOLD    0x21
#define FONT_OEMUND     0x22
#define FONT_OEMBOLDUND 0x23

#define FONT_MAXNO      0x2F
#define FONT_SHIFT      5
static HFONT fonts[FONT_MAXNO];
static LOGFONT lfont;
static int fontflag[FONT_MAXNO];
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 HBITMAP caretbm;

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

/* this allows xterm-style mouse handling. */
static int send_raw_mouse = 0;
static int wheel_accumulator = 0;

static char *window_name, *icon_name;

static int compose_state = 0;

static UINT wm_mousewheel = WM_MOUSEWHEEL;

/* Dummy routine, only required in plink. */
void ldisc_update(void *frontend, int echo, int edit)
{
}

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
{
    WNDCLASS wndclass;
    MSG msg;
    int guess_width, guess_height;

    hinst = inst;
    flags = FLAG_VERBOSE | FLAG_INTERACTIVE;

    sk_init();

    InitCommonControls();

    /* Ensure a Maximize setting in Explorer doesn't maximise the
     * config box. */
    defuse_showwindow();

    if (!init_winver())
    {
      char *str = dupprintf("%s Fatal Error", appname);
      MessageBox(NULL, "Windows refuses to report a version",
               str, MB_OK | MB_ICONEXCLAMATION);
      sfree(str);
      return 1;
    }

    /*
     * If we're running a version of Windows that doesn't support
     * WM_MOUSEWHEEL, find out what message number we should be
     * using instead.
     */
    if (osVersion.dwMajorVersion < 4 ||
      (osVersion.dwMajorVersion == 4 && 
       osVersion.dwPlatformId != VER_PLATFORM_WIN32_NT))
      wm_mousewheel = RegisterWindowMessage("MSWHEEL_ROLLMSG");

    /*
     * See if we can find our Help file.
     */
    {
        char b[2048], *p, *q, *r;
        FILE *fp;
        GetModuleFileName(NULL, b, sizeof(b) - 1);
        r = b;
        p = strrchr(b, '\\');
        if (p && p >= r) r = p+1;
        q = strrchr(b, ':');
        if (q && q >= r) r = q+1;
        strcpy(r, "putty.hlp");
        if ( (fp = fopen(b, "r")) != NULL) {
            help_path = dupstr(b);
            fclose(fp);
        } else
            help_path = NULL;
        strcpy(r, "putty.cnt");
        if ( (fp = fopen(b, "r")) != NULL) {
            help_has_contents = TRUE;
            fclose(fp);
        } else
            help_has_contents = FALSE;
    }

    /*
     * Process the command line.
     */
    {
      char *p;
      int got_host = 0;

      default_protocol = be_default_protocol;
      /* Find the appropriate default port. */
      {
          int i;
          default_port = 0; /* illegal */
          for (i = 0; backends[i].backend != NULL; i++)
            if (backends[i].protocol == default_protocol) {
                default_port = backends[i].backend->default_port;
                break;
            }
      }
      cfg.logtype = LGTYP_NONE;

      do_defaults(NULL, &cfg);

      p = cmdline;

      /*
       * Process a couple of command-line options which are more
       * easily dealt with before the line is broken up into
       * words. These are the soon-to-be-defunct @sessionname and
       * the internal-use-only &sharedmemoryhandle, neither of
       * which are combined with anything else.
       */
      while (*p && isspace(*p))
          p++;
      if (*p == '@') {
          int i = strlen(p);
          while (i > 1 && isspace(p[i - 1]))
            i--;
          p[i] = '\0';
          do_defaults(p + 1, &cfg);
          if (!*cfg.host && !do_config()) {
            cleanup_exit(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()) {
            cleanup_exit(0);
          }
      } else {
          /*
           * Otherwise, break up the command line and deal with
           * it sensibly.
           */
          int argc, i;
          char **argv;
          
          split_into_argv(cmdline, &argc, &argv, NULL);

          for (i = 0; i < argc; i++) {
            char *p = argv[i];
            int ret;

            ret = cmdline_process_param(p, i+1<argc?argv[i+1]:NULL,
                                  1, &cfg);
            if (ret == -2) {
                cmdline_error("option \"%s\" requires an argument", p);
            } else if (ret == 2) {
                i++;           /* skip next argument */
            } else if (ret == 1) {
                continue;            /* nothing further needs doing */
            } else if (!strcmp(p, "-cleanup")) {
                /*
                 * `putty -cleanup'. Remove all registry
                 * entries associated with PuTTY, and also find
                 * and delete the random seed file.
                 */
                char *s1, *s2;
                s1 = dupprintf("This procedure will remove ALL Registry\n"
                           "entries associated with %s, and will\n"
                           "also remove the random seed file.\n"
                           "\n"
                           "THIS PROCESS WILL DESTROY YOUR SAVED\n"
                           "SESSIONS. Are you really sure you want\n"
                           "to continue?", appname);
                s2 = dupprintf("%s Warning", appname);
                if (MessageBox(NULL, s1, s2,
                           MB_YESNO | MB_ICONWARNING) == IDYES) {
                  cleanup_all();
                }
                sfree(s1);
                sfree(s2);
                exit(0);
            } else if (*p != '-') {
                char *q = p;
                if (got_host) {
                  /*
                   * If we already have a host name, treat
                   * this argument as a port number. NB we
                   * have to treat this as a saved -P
                   * argument, so that it will be deferred
                   * until it's a good moment to run it.
                   */
                  int ret = cmdline_process_param("-P", p, 1, &cfg);
                  assert(ret == 2);
                } else if (!strncmp(q, "telnet:", 7)) {
                  /*
                   * If the hostname starts with "telnet:",
                   * set the protocol to Telnet and process
                   * the string as a Telnet URL.
                   */
                  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';
                  got_host = 1;
                } else {
                  /*
                   * Otherwise, treat this argument as a host
                   * name.
                   */
                  while (*p && !isspace(*p))
                      p++;
                  if (*p)
                      *p++ = '\0';
                  strncpy(cfg.host, q, sizeof(cfg.host) - 1);
                  cfg.host[sizeof(cfg.host) - 1] = '\0';
                  got_host = 1;
                }
            } else {
                cmdline_error("unknown option \"%s\"", p);
            }
          }
      }

      cmdline_run_saved(&cfg);

      if (!*cfg.host && !do_config()) {
          cleanup_exit(0);
      }

      /*
       * Trim leading whitespace off the hostname if it's there.
       */
      {
          int space = strspn(cfg.host, " \t");
          memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space);
      }

      /* See if host is of the form user@host */
      if (cfg.host[0] != '\0') {
          char *atsign = strchr(cfg.host, '@');
          /* Make sure we're not overflowing the user field */
          if (atsign) {
            if (atsign - cfg.host < sizeof cfg.username) {
                strncpy(cfg.username, cfg.host, atsign - cfg.host);
                cfg.username[atsign - cfg.host] = '\0';
            }
            memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1));
          }
      }

      /*
       * Trim a colon suffix off the hostname if it's there.
       */
      cfg.host[strcspn(cfg.host, ":")] = '\0';

      /*
       * Remove any remaining whitespace from the hostname.
       */
      {
          int p1 = 0, p2 = 0;
          while (cfg.host[p2] != '\0') {
            if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') {
                cfg.host[p1] = cfg.host[p2];
                p1++;
            }
            p2++;
          }
          cfg.host[p1] = '\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) {
          char *str = dupprintf("%s Internal Error", appname);
          MessageBox(NULL, "Unsupported protocol number found",
                   str, MB_OK | MB_ICONEXCLAMATION);
          sfree(str);
          cleanup_exit(1);
      }
    }

    /* Check for invalid Port number (i.e. zero) */
    if (cfg.port == 0) {
      char *str = dupprintf("%s Internal Error", appname);
      MessageBox(NULL, "Invalid Port Number",
               str, MB_OK | MB_ICONEXCLAMATION);
      sfree(str);
      cleanup_exit(1);
    }

    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 = NULL;
      wndclass.lpszMenuName = NULL;
      wndclass.lpszClassName = appname;

      RegisterClass(&wndclass);
    }

    hwnd = NULL;

    memset(&ucsdata, 0, sizeof(ucsdata));

    term = term_init(&cfg, &ucsdata, NULL);
    logctx = log_init(NULL, &cfg);
    term_provide_logctx(term, logctx);

    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(term, cfg.height, cfg.width, cfg.savelines);
    guess_width = extra_width + font_width * term->cols;
    guess_height = extra_height + font_height * term->rows;
    {
      RECT r;
            get_fullscreen_rect(&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;
      int exwinmode = 0;
      if (!cfg.scrollbar)
          winmode &= ~(WS_VSCROLL);
      if (cfg.resize_action == RESIZE_DISABLED)
          winmode &= ~(WS_THICKFRAME | WS_MAXIMIZEBOX);
      if (cfg.alwaysontop)
          exwinmode |= WS_EX_TOPMOST;
      if (cfg.sunken_edge)
          exwinmode |= WS_EX_CLIENTEDGE;
      hwnd = CreateWindowEx(exwinmode, 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}.
     */
    init_fonts(0,0);

    /*
     * Correct the guesses for extra_{width,height}.
     */
    {
      RECT cr, wr;
      GetWindowRect(hwnd, &wr);
      GetClientRect(hwnd, &cr);
      offset_width = offset_height = cfg.window_border;
      extra_width = wr.right - wr.left - cr.right + cr.left + offset_width*2;
      extra_height = wr.bottom - wr.top - cr.bottom + cr.top +offset_height*2;
    }

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

    /*
     * Set up a caret bitmap, with no content.
     */
    {
      char *bits;
      int size = (font_width + 15) / 16 * 2 * font_height;
      bits = snewn(size, char);
      memset(bits, 0, size);
      caretbm = CreateBitmap(font_width, font_height, 1, 1, bits);
      sfree(bits);
    }
    CreateCaret(hwnd, caretbm, font_width, font_height);

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

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

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

      error = back->init(NULL, &backhandle, &cfg,
                     cfg.host, cfg.port, &realhost, cfg.tcp_nodelay,
                     cfg.tcp_keepalives);
      back->provide_logctx(backhandle, logctx);
      if (error) {
          char *str = dupprintf("%s Error", appname);
          sprintf(msg, "Unable to open connection to\n"
                "%.800s\n" "%s", cfg.host, error);
          MessageBox(NULL, msg, str, MB_ICONERROR | MB_OK);
          sfree(str);
          return 0;
      }
      window_name = icon_name = NULL;
      if (*cfg.wintitle) {
          title = cfg.wintitle;
      } else {
          sprintf(msg, "%s - %s", realhost, appname);
          title = msg;
      }
      sfree(realhost);
      set_title(NULL, title);
      set_icon(NULL, title);
    }

    /*
     * Connect the terminal to the backend for resize purposes.
     */
    term_provide_resize_fn(term, back->size, backhandle);

    /*
     * Set up a line discipline.
     */
    ldisc = ldisc_create(&cfg, term, back, backhandle, NULL);

    session_closed = FALSE;

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

    /*
     * Set up the session-control options on the system menu.
     */
    {
      HMENU s, m;
      int i, j;
      char *str;

      popup_menus[SYSMENU].menu = GetSystemMenu(hwnd, FALSE);
      popup_menus[CTXMENU].menu = CreatePopupMenu();
      AppendMenu(popup_menus[CTXMENU].menu, MF_ENABLED, IDM_PASTE, "&Paste");

      s = CreateMenu();
      get_sesslist(&sesslist, TRUE);
      for (i = 1;
           i < ((sesslist.nsessions < 256) ? sesslist.nsessions : 256);
           i++)
          AppendMenu(s, MF_ENABLED, IDM_SAVED_MIN + (16 * i),
                   sesslist.sessions[i]);

      for (j = 0; j < lenof(popup_menus); j++) {
          m = popup_menus[j].menu;

          AppendMenu(m, MF_SEPARATOR, 0, 0);
          popup_menus[j].specials_submenu_pos = GetMenuItemCount(m);
          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");
          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_COPYALL, "C&opy All to Clipboard");
          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, (cfg.resize_action == RESIZE_DISABLED) ?
                   MF_GRAYED : MF_ENABLED, IDM_FULLSCREEN, "&Full Screen");
          AppendMenu(m, MF_SEPARATOR, 0, 0);
          if (help_path)
            AppendMenu(m, MF_ENABLED, IDM_HELP, "&Help");
          str = dupprintf("&About %s", appname);
          AppendMenu(m, MF_ENABLED, IDM_ABOUT, str);
          sfree(str);
      }
    }

    update_specials_menu(NULL);

    /*
     * Set up the initial input locale.
     */
    set_input_locale(GetKeyboardLayout(0));

    /*
     * Open the initial log file if there is one.
     */
    logfopen(logctx);

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

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

    term->has_focus = (GetForegroundWindow() == hwnd);
    UpdateWindow(hwnd);

    if (GetMessage(&msg, NULL, 0, 0) == 1) {
      int timer_id = 0, long_timer = 0;

      while (msg.message != WM_QUIT) {
          /* 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);
          if (!(IsWindow(logbox) && IsDialogMessage(logbox, &msg)))
            DispatchMessage(&msg);

          /* Make sure we blink everything that needs it. */
          term_blink(term, 0);

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

          /* 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_REMOVE))
            continue;

          if (pending_netevent) {
            enact_pending_netevent();

            if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
                continue;
          }

          /* Okay there is now nothing to do so we make sure the screen is
           * completely up to date then tell windows to call us in a little 
           * while.
           */
          if (timer_id) {
            KillTimer(hwnd, timer_id);
            timer_id = 0;
          }
          HideCaret(hwnd);
          if (GetCapture() != hwnd || 
            (send_raw_mouse &&
             !(cfg.mouse_override && is_shift_pressed())))
            term_out(term);
          term_update(term);
          ShowCaret(hwnd);

          flash_window(1);           /* maintain */

          /* The messages seem unreliable; especially if we're being tricky */
          term->has_focus = (GetForegroundWindow() == hwnd);

          if (term->in_vbell)
            /* Hmm, term_update didn't want to do an update too soon ... */
            timer_id = SetTimer(hwnd, 1, 50, NULL);
          else if (!term->has_focus)
            timer_id = SetTimer(hwnd, 1, 500, NULL);
          else
            timer_id = SetTimer(hwnd, 1, 100, NULL);
          long_timer = 1;

          /* There's no point rescanning everything in the message queue
           * so we do an apparently unnecessary wait here
           */
          WaitMessage();
          if (GetMessage(&msg, NULL, 0, 0) != 1)
            break;
      }
    }

    cleanup_exit(msg.wParam);        /* this doesn't return... */
    return msg.wParam;               /* ... but optimiser doesn't know */
}

/*
 * Clean up and exit.
 */
void cleanup_exit(int code)
{
    /*
     * Clean up.
     */
    deinit_fonts();
    sfree(logpal);
    if (pal)
      DeleteObject(pal);
    sk_cleanup();

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

    exit(code);
}

/*
 * Set up, or shut down, an AsyncSelect. Called from winnet.c.
 */
char *do_select(SOCKET skt, int startup)
{
    int msg, events;
    if (startup) {
      msg = WM_NETEVENT;
      events = (FD_CONNECT | FD_READ | FD_WRITE |
              FD_OOB | FD_CLOSE | FD_ACCEPT);
    } else {
      msg = events = 0;
    }
    if (!hwnd)
      return "do_select(): internal error (hwnd==NULL)";
    if (p_WSAAsyncSelect(skt, hwnd, msg, events) == SOCKET_ERROR) {
      switch (p_WSAGetLastError()) {
        case WSAENETDOWN:
          return "Network is down";
        default:
          return "WSAAsyncSelect(): unknown error";
      }
    }
    return NULL;
}

/*
 * Update the Special Commands submenu.
 */
void update_specials_menu(void *frontend)
{
    HMENU m = GetSystemMenu(hwnd, FALSE);
    int menu_already_exists = (specials != NULL);
    int i, j;

    specials = back->get_specials(backhandle);
    if (specials) {
      HMENU p = CreateMenu();
      for (i = 0; specials[i].name; i++) {
          assert(IDM_SPECIAL_MIN + 0x10 * i < IDM_SPECIAL_MAX);
          if (*specials[i].name)
            AppendMenu(p, MF_ENABLED, IDM_SPECIAL_MIN + 0x10 * i,
                     specials[i].name);
          else
            AppendMenu(p, MF_SEPARATOR, 0, 0);
      }
      for (j = 0; j < lenof(popup_menus); j++) {
          if (menu_already_exists)
            DeleteMenu(popup_menus[j].menu,
                     popup_menus[j].specials_submenu_pos,
                     MF_BYPOSITION);
          else
            InsertMenu(popup_menus[j].menu,
                     popup_menus[j].specials_submenu_pos,
                     MF_BYPOSITION | MF_SEPARATOR, 0, 0);
          InsertMenu(popup_menus[j].menu,
                   popup_menus[j].specials_submenu_pos,
                   MF_BYPOSITION | MF_POPUP | MF_ENABLED,
                   (UINT) p, "Special Command");
      }
    }
}

/*
 * set or clear the "raw mouse message" mode
 */
void set_raw_mouse_mode(void *frontend, int activate)
{
    activate = activate && !cfg.no_mouse_rep;
    send_raw_mouse = activate;
    SetCursor(LoadCursor(NULL, activate ? IDC_ARROW : IDC_IBEAM));
}

/*
 * Print a message box and close the connection.
 */
void connection_fatal(void *frontend, char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);

    if (cfg.close_on_exit == FORCE_ON)
      PostQuitMessage(1);
    else {
      session_closed = TRUE;
      sprintf(morestuff, "%.70s (inactive)", appname);
      set_icon(NULL, morestuff);
      set_title(NULL, morestuff);
    }
}

/*
 * Report an error at the command-line parsing stage.
 */
void cmdline_error(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Command Line Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);
    exit(1);
}

/*
 * Actually do the job requested by a WM_NETEVENT
 */
static void enact_pending_netevent(void)
{
    static int reentering = 0;
    extern int select_result(WPARAM, LPARAM);
    int ret;

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

    pending_netevent = FALSE;

    reentering = 1;
    ret = select_result(pend_netevent_wParam, pend_netevent_lParam);
    reentering = 0;

    if (ret == 0 && !session_closed) {
      /* Abnormal exits will already have set session_closed and taken
       * appropriate action. */
      if (cfg.close_on_exit == FORCE_ON ||
          cfg.close_on_exit == AUTO) PostQuitMessage(0);
      else {
          char morestuff[100];
          session_closed = TRUE;
          sprintf(morestuff, "%.70s (inactive)", appname);
          set_icon(NULL, morestuff);
          set_title(NULL, morestuff);
          MessageBox(hwnd, "Connection closed by remote host",
                   appname, MB_OK | MB_ICONINFORMATION);
      }
    }
}

/*
 * 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];
    }

    /* Override with system colours if appropriate */
    if (cfg.system_colour)
        systopalette();
}

/*
 * Override bit of defpal with colours from the system.
 * (NB that this takes a copy the system colours at the time this is called,
 * so subsequent colour scheme changes don't take effect. To fix that we'd
 * probably want to be using GetSysColorBrush() and the like.)
 */
static void systopalette(void)
{
    int i;
    static const struct { int nIndex; int norm; int bold; } or[] =
    {
      { COLOR_WINDOWTEXT,     16, 17 }, /* Default Foreground */
      { COLOR_WINDOW,         18, 19 }, /* Default Background */
      { COLOR_HIGHLIGHTTEXT,  20, 21 }, /* Cursor Text */
      { COLOR_HIGHLIGHT,      22, 23 }, /* Cursor Colour */
    };

    for (i = 0; i < (sizeof(or)/sizeof(or[0])); i++) {
      COLORREF colour = GetSysColor(or[i].nIndex);
      defpal[or[i].norm].rgbtRed =
         defpal[or[i].bold].rgbtRed = GetRValue(colour);
      defpal[or[i].norm].rgbtGreen =
         defpal[or[i].bold].rgbtGreen = GetGValue(colour);
      defpal[or[i].norm].rgbtBlue =
         defpal[or[i].bold].rgbtBlue = GetBValue(colour);
    }
}

/*
 * 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) {
          /*
           * This is a genuine case where we must use smalloc
           * because the snew macros can't cope.
           */
          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 initially. There may be as many as
 * three or as few as one.  The other (poentially) twentyone fonts are done
 * if/when they are needed.
 *
 * 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, int pick_height)
{
    TEXTMETRIC tm;
    CPINFO cpinfo;
    int fontsize[3];
    int i;
    HDC hdc;
    int fw_dontcare, fw_bold;

    for (i = 0; i < FONT_MAXNO; i++)
      fonts[i] = NULL;

    bold_mode = cfg.bold_colour ? BOLD_COLOURS : BOLD_FONT;
    und_mode = UND_FONT;

    if (cfg.font.isbold) {
      fw_dontcare = FW_BOLD;
      fw_bold = FW_HEAVY;
    } else {
      fw_dontcare = FW_DONTCARE;
      fw_bold = FW_BOLD;
    }

    hdc = GetDC(hwnd);

    if (pick_height)
      font_height = pick_height;
    else {
      font_height = cfg.font.height;
      if (font_height > 0) {
          font_height =
            -MulDiv(font_height, GetDeviceCaps(hdc, LOGPIXELSY), 72);
      }
    }
    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.name)

    f(FONT_NORMAL, cfg.font.charset, fw_dontcare, FALSE);

    lfont.lfHeight = font_height;
    lfont.lfWidth = font_width;
    lfont.lfEscapement = 0;
    lfont.lfOrientation  = 0;
    lfont.lfWeight  = fw_dontcare;
    lfont.lfItalic = FALSE;
    lfont.lfUnderline = FALSE;
    lfont.lfStrikeOut = FALSE;
    lfont.lfCharSet = cfg.font.charset;
    lfont.lfOutPrecision = OUT_DEFAULT_PRECIS;
    lfont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
    lfont.lfQuality = DEFAULT_QUALITY;
    lfont.lfPitchAndFamily = FIXED_PITCH | FF_DONTCARE;
    strncpy(lfont.lfFaceName, cfg.font.name, LF_FACESIZE);

    SelectObject(hdc, fonts[FONT_NORMAL]);
    GetTextMetrics(hdc, &tm);

    if (pick_width == 0 || pick_height == 0) {
      font_height = tm.tmHeight;
      font_width = tm.tmAveCharWidth;
    }
    font_dualwidth = (tm.tmAveCharWidth != tm.tmMaxCharWidth);

#ifdef RDB_DEBUG_PATCH
    debug(23, "Primary font H=%d, AW=%d, MW=%d",
          tm.tmHeight, tm.tmAveCharWidth, tm.tmMaxCharWidth);
#endif

    {
      CHARSETINFO info;
      DWORD cset = tm.tmCharSet;
      memset(&info, 0xFF, sizeof(info));

      /* !!! Yes the next line is right */
      if (cset == OEM_CHARSET)
          ucsdata.font_codepage = GetOEMCP();
      else
          if (TranslateCharsetInfo ((DWORD *) cset, &info, TCI_SRCCHARSET))
            ucsdata.font_codepage = info.ciACP;
      else
          ucsdata.font_codepage = -1;

      GetCPInfo(ucsdata.font_codepage, &cpinfo);
      ucsdata.dbcs_screenfont = (cpinfo.MaxCharSize > 1);
    }

    f(FONT_UNDERLINE, cfg.font.charset, 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);
      if (!gotit) {
          und_mode = UND_LINE;
          DeleteObject(fonts[FONT_UNDERLINE]);
          fonts[FONT_UNDERLINE] = 0;
      }
    }

    if (bold_mode == BOLD_FONT) {
      f(FONT_BOLD, cfg.font.charset, fw_bold, FALSE);
    }
#undef f

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

    for (i = 0; i < 3; i++) {
      if (fonts[i]) {
          if (SelectObject(hdc, fonts[i]) && GetTextMetrics(hdc, &tm))
            fontsize[i] = tm.tmAveCharWidth + 256 * tm.tmHeight;
          else
            fontsize[i] = -i;
      } else
          fontsize[i] = -i;
    }

    ReleaseDC(hwnd, hdc);

    if (fontsize[FONT_UNDERLINE] != fontsize[FONT_NORMAL]) {
      und_mode = UND_LINE;
      DeleteObject(fonts[FONT_UNDERLINE]);
      fonts[FONT_UNDERLINE] = 0;
    }

    if (bold_mode == BOLD_FONT &&
      fontsize[FONT_BOLD] != fontsize[FONT_NORMAL]) {
      bold_mode = BOLD_SHADOW;
      DeleteObject(fonts[FONT_BOLD]);
      fonts[FONT_BOLD] = 0;
    }
    fontflag[0] = fontflag[1] = fontflag[2] = 1;

    init_ucs(&cfg, &ucsdata);
}

static void another_font(int fontno)
{
    int basefont;
    int fw_dontcare, fw_bold;
    int c, u, w, x;
    char *s;

    if (fontno < 0 || fontno >= FONT_MAXNO || fontflag[fontno])
      return;

    basefont = (fontno & ~(FONT_BOLDUND));
    if (basefont != fontno && !fontflag[basefont])
      another_font(basefont);

    if (cfg.font.isbold) {
      fw_dontcare = FW_BOLD;
      fw_bold = FW_HEAVY;
    } else {
      fw_dontcare = FW_DONTCARE;
      fw_bold = FW_BOLD;
    }

    c = cfg.font.charset;
    w = fw_dontcare;
    u = FALSE;
    s = cfg.font.name;
    x = font_width;

    if (fontno & FONT_WIDE)
      x *= 2;
    if (fontno & FONT_NARROW)
      x = (x+1)/2;
    if (fontno & FONT_OEM)
      c = OEM_CHARSET;
    if (fontno & FONT_BOLD)
      w = fw_bold;
    if (fontno & FONT_UNDERLINE)
      u = TRUE;

    fonts[fontno] =
      CreateFont(font_height * (1 + !!(fontno & FONT_HIGH)), x, 0, 0, w,
               FALSE, u, FALSE, c, OUT_DEFAULT_PRECIS,
               CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY,
               FIXED_PITCH | FF_DONTCARE, s);

    fontflag[fontno] = 1;
}

static void deinit_fonts(void)
{
    int i;
    for (i = 0; i < FONT_MAXNO; i++) {
      if (fonts[i])
          DeleteObject(fonts[i]);
      fonts[i] = 0;
      fontflag[i] = 0;
    }
}

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

    /* If the window is maximized supress resizing attempts */
    if (IsZoomed(hwnd)) {
      if (cfg.resize_action == RESIZE_TERM)
          return;
    }

    if (cfg.resize_action == RESIZE_DISABLED) return;
    if (h == term->rows && w == term->cols) return;

    /* Sanity checks ... */
    {
      static int first_time = 1;
      static RECT ss;

      switch (first_time) {
        case 1:
          /* Get the size of the screen */
          if (get_fullscreen_rect(&ss))
            /* first_time = 0 */ ;
          else {
            first_time = 2;
            break;
          }
        case 0:
          /* Make sure the values are sane */
          width = (ss.right - ss.left - extra_width) / 4;
          height = (ss.bottom - ss.top - extra_height) / 6;

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

    term_size(term, h, w, cfg.savelines);

    if (cfg.resize_action != RESIZE_FONT && !IsZoomed(hwnd)) {
      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);
    } else
      reset_window(0);

    InvalidateRect(hwnd, NULL, TRUE);
}

static void reset_window(int reinit) {
    /*
     * This function decides how to resize or redraw when the 
     * user changes something. 
     *
     * This function doesn't like to change the terminal size but if the
     * font size is locked that may be it's only soluion.
     */
    int win_width, win_height;
    RECT cr, wr;

#ifdef RDB_DEBUG_PATCH
    debug((27, "reset_window()"));
#endif

    /* Current window sizes ... */
    GetWindowRect(hwnd, &wr);
    GetClientRect(hwnd, &cr);

    win_width  = cr.right - cr.left;
    win_height = cr.bottom - cr.top;

    if (cfg.resize_action == RESIZE_DISABLED) reinit = 2;

    /* Are we being forced to reload the fonts ? */
    if (reinit>1) {
#ifdef RDB_DEBUG_PATCH
      debug((27, "reset_window() -- Forced deinit"));
#endif
      deinit_fonts();
      init_fonts(0,0);
    }

    /* Oh, looks like we're minimised */
    if (win_width == 0 || win_height == 0)
      return;

    /* Is the window out of position ? */
    if ( !reinit && 
          (offset_width != (win_width-font_width*term->cols)/2 ||
           offset_height != (win_height-font_height*term->rows)/2) ){
      offset_width = (win_width-font_width*term->cols)/2;
      offset_height = (win_height-font_height*term->rows)/2;
      InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
      debug((27, "reset_window() -> Reposition terminal"));
#endif
    }

    if (IsZoomed(hwnd)) {
      /* We're fullscreen, this means we must not change the size of
       * the window so it's the font size or the terminal itself.
       */

      extra_width = wr.right - wr.left - cr.right + cr.left;
      extra_height = wr.bottom - wr.top - cr.bottom + cr.top;

      if (cfg.resize_action != RESIZE_TERM) {
          if (  font_width != win_width/term->cols || 
              font_height != win_height/term->rows) {
            deinit_fonts();
            init_fonts(win_width/term->cols, win_height/term->rows);
            offset_width = (win_width-font_width*term->cols)/2;
            offset_height = (win_height-font_height*term->rows)/2;
            InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
            debug((25, "reset_window() -> Z font resize to (%d, %d)",
                  font_width, font_height));
#endif
          }
      } else {
          if (  font_width != win_width/term->cols || 
              font_height != win_height/term->rows) {
            /* Our only choice at this point is to change the 
             * size of the terminal; Oh well.
             */
            term_size(term, win_height/font_height, win_width/font_width,
                    cfg.savelines);
            offset_width = (win_width-font_width*term->cols)/2;
            offset_height = (win_height-font_height*term->rows)/2;
            InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
            debug((27, "reset_window() -> Zoomed term_size"));
#endif
          }
      }
      return;
    }

    /* Hmm, a force re-init means we should ignore the current window
     * so we resize to the default font size.
     */
    if (reinit>0) {
#ifdef RDB_DEBUG_PATCH
      debug((27, "reset_window() -> Forced re-init"));
#endif

      offset_width = offset_height = cfg.window_border;
      extra_width = wr.right - wr.left - cr.right + cr.left + offset_width*2;
      extra_height = wr.bottom - wr.top - cr.bottom + cr.top +offset_height*2;

      if (win_width != font_width*term->cols + offset_width*2 ||
          win_height != font_height*term->rows + offset_height*2) {

          /* If this is too large windows will resize it to the maximum
           * allowed window size, we will then be back in here and resize
           * the font or terminal to fit.
           */
          SetWindowPos(hwnd, NULL, 0, 0, 
                     font_width*term->cols + extra_width, 
                   font_height*term->rows + extra_height,
                   SWP_NOMOVE | SWP_NOZORDER);
      }

      InvalidateRect(hwnd, NULL, TRUE);
      return;
    }

    /* Okay the user doesn't want us to change the font so we try the 
     * window. But that may be too big for the screen which forces us
     * to change the terminal.
     */
    if ((cfg.resize_action == RESIZE_TERM && reinit<=0) ||
        (cfg.resize_action == RESIZE_EITHER && reinit<0) ||
          reinit>0) {
      offset_width = offset_height = cfg.window_border;
      extra_width = wr.right - wr.left - cr.right + cr.left + offset_width*2;
      extra_height = wr.bottom - wr.top - cr.bottom + cr.top +offset_height*2;

      if (win_width != font_width*term->cols + offset_width*2 ||
          win_height != font_height*term->rows + offset_height*2) {

          static RECT ss;
          int width, height;
            
            get_fullscreen_rect(&ss);

          width = (ss.right - ss.left - extra_width) / font_width;
          height = (ss.bottom - ss.top - extra_height) / font_height;

          /* Grrr too big */
          if ( term->rows > height || term->cols > width ) {
            if (cfg.resize_action == RESIZE_EITHER) {
                /* Make the font the biggest we can */
                if (term->cols > width)
                  font_width = (ss.right - ss.left - extra_width)
                      / term->cols;
                if (term->rows > height)
                  font_height = (ss.bottom - ss.top - extra_height)
                      / term->rows;

                deinit_fonts();
                init_fonts(font_width, font_height);

                width = (ss.right - ss.left - extra_width) / font_width;
                height = (ss.bottom - ss.top - extra_height) / font_height;
            } else {
                if ( height > term->rows ) height = term->rows;
                if ( width > term->cols )  width = term->cols;
                term_size(term, height, width, cfg.savelines);
#ifdef RDB_DEBUG_PATCH
                debug((27, "reset_window() -> term resize to (%d,%d)",
                         height, width));
#endif
            }
          }
          
          SetWindowPos(hwnd, NULL, 0, 0, 
                     font_width*term->cols + extra_width, 
                   font_height*term->rows + extra_height,
                   SWP_NOMOVE | SWP_NOZORDER);

          InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
          debug((27, "reset_window() -> window resize to (%d,%d)",
                  font_width*term->cols + extra_width,
                  font_height*term->rows + extra_height));
#endif
      }
      return;
    }

    /* We're allowed to or must change the font but do we want to ?  */

    if (font_width != (win_width-cfg.window_border*2)/term->cols || 
      font_height != (win_height-cfg.window_border*2)/term->rows) {

      deinit_fonts();
      init_fonts((win_width-cfg.window_border*2)/term->cols, 
               (win_height-cfg.window_border*2)/term->rows);
      offset_width = (win_width-font_width*term->cols)/2;
      offset_height = (win_height-font_height*term->rows)/2;

      extra_width = wr.right - wr.left - cr.right + cr.left +offset_width*2;
      extra_height = wr.bottom - wr.top - cr.bottom + cr.top+offset_height*2;

      InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
      debug((25, "reset_window() -> font resize to (%d,%d)", 
               font_width, font_height));
#endif
    }
}

static void set_input_locale(HKL kl)
{
    char lbuf[20];

    GetLocaleInfo(LOWORD(kl), LOCALE_IDEFAULTANSICODEPAGE,
              lbuf, sizeof(lbuf));

    kbd_codepage = atoi(lbuf);
}

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

    if (send_raw_mouse && !(cfg.mouse_override && shift)) {
      lastbtn = MBT_NOTHING;
      term_mouse(term, b, translate_button(b), MA_CLICK,
               x, y, shift, ctrl, alt);
      return;
    }

    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(term, b, translate_button(b), lastact,
               x, y, shift, ctrl, alt);
    lasttime = thistime;
}

/*
 * Translate a raw mouse button designation (LEFT, MIDDLE, RIGHT)
 * into a cooked one (SELECT, EXTEND, PASTE).
 */
static Mouse_Button translate_button(Mouse_Button button)
{
    if (button == MBT_LEFT)
      return MBT_SELECT;
    if (button == MBT_MIDDLE)
      return cfg.mouse_is_xterm == 1 ? MBT_PASTE : MBT_EXTEND;
    if (button == MBT_RIGHT)
      return cfg.mouse_is_xterm == 1 ? MBT_EXTEND : MBT_PASTE;
    return 0;                        /* shouldn't happen */
}

static void show_mouseptr(int show)
{
    static int cursor_visible = 1;
    if (!cfg.hide_mouseptr)          /* override if this feature disabled */
      show = 1;
    if (cursor_visible && !show)
      ShowCursor(FALSE);
    else if (!cursor_visible && show)
      ShowCursor(TRUE);
    cursor_visible = show;
}

static int is_alt_pressed(void)
{
    BYTE keystate[256];
    int r = GetKeyboardState(keystate);
    if (!r)
      return FALSE;
    if (keystate[VK_MENU] & 0x80)
      return TRUE;
    if (keystate[VK_RMENU] & 0x80)
      return TRUE;
    return FALSE;
}

static int is_shift_pressed(void)
{
    BYTE keystate[256];
    int r = GetKeyboardState(keystate);
    if (!r)
      return FALSE;
    if (keystate[VK_SHIFT] & 0x80)
      return TRUE;
    return FALSE;
}

static int resizing;

static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
                        WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    static int ignore_clip = FALSE;
    static int need_backend_resize = FALSE;
    static int fullscr_on_max = FALSE;
    static UINT last_mousemove = 0;

    switch (message) {
      case WM_TIMER:
      if (pending_netevent)
          enact_pending_netevent();
      if (GetCapture() != hwnd || 
          (send_raw_mouse && !(cfg.mouse_override && is_shift_pressed())))
          term_out(term);
      noise_regular();
      HideCaret(hwnd);
      term_update(term);
      ShowCaret(hwnd);
      if (cfg.ping_interval > 0) {
          time_t now;
          time(&now);
          if (now - last_movement > cfg.ping_interval) {
            back->special(backhandle, TS_PING);
            last_movement = now;
          }
      }
      net_pending_errors();
      return 0;
      case WM_CREATE:
      break;
      case WM_CLOSE:
      {
          char *str;
          show_mouseptr(1);
          str = dupprintf("%s Exit Confirmation", appname);
          if (!cfg.warn_on_close || session_closed ||
            MessageBox(hwnd,
                     "Are you sure you want to close this session?",
                     str, MB_ICONWARNING | MB_OKCANCEL) == IDOK)
            DestroyWindow(hwnd);
          sfree(str);
      }
      return 0;
      case WM_DESTROY:
      show_mouseptr(1);
      PostQuitMessage(0);
      return 0;
      case WM_COMMAND:
      case WM_SYSCOMMAND:
      switch (wParam & ~0xF) {       /* low 4 bits reserved to Windows */
        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) {
                if ((lParam - IDM_SAVED_MIN) / 16 < sesslist.nsessions) {
                  char *session =
                      sesslist.sessions[(lParam - IDM_SAVED_MIN) / 16];
                  cl = snewn(16 + strlen(session), char);
                               /* 8, but play safe */
                  if (!cl)
                      cl = NULL;    
                               /* not a very important failure mode */
                  else {
                      sprintf(cl, "putty @%s", session);
                      freecl = TRUE;
                  }
                } else
                  break;
            } 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)
                sfree(cl);
          }
          break;
        case IDM_RECONF:
          {
            Config prev_cfg;
            int init_lvl = 1;

            GetWindowText(hwnd, cfg.wintitle, sizeof(cfg.wintitle));
            prev_cfg = cfg;

            if (!do_reconfig(hwnd))
                break;

            {
                /* Disable full-screen if resizing forbidden */
                HMENU m = GetSystemMenu (hwnd, FALSE);
                EnableMenuItem(m, IDM_FULLSCREEN, MF_BYCOMMAND | 
                           (cfg.resize_action == RESIZE_DISABLED)
                           ? MF_GRAYED : MF_ENABLED);
                /* Gracefully unzoom if necessary */
                if (IsZoomed(hwnd) &&
                  (cfg.resize_action == RESIZE_DISABLED)) {
                  ShowWindow(hwnd, SW_RESTORE);
                }
            }

            /* Pass new config data to the logging module */
            log_reconfig(logctx, &cfg);

            sfree(logpal);
            /*
             * Flush the line discipline's edit buffer in the
             * case where local editing has just been disabled.
             */
            ldisc_send(ldisc, NULL, 0, 0);
            if (pal)
                DeleteObject(pal);
            logpal = NULL;
            pal = NULL;
            cfgtopalette();
            init_palette();

            /* Pass new config data to the terminal */
            term_reconfig(term, &cfg);

            /* Pass new config data to the back end */
            back->reconfig(backhandle, &cfg);

            /* Screen size changed ? */
            if (cfg.height != prev_cfg.height ||
                cfg.width != prev_cfg.width ||
                cfg.savelines != prev_cfg.savelines ||
                cfg.resize_action == RESIZE_FONT ||
                (cfg.resize_action == RESIZE_EITHER && IsZoomed(hwnd)) ||
                cfg.resize_action == RESIZE_DISABLED)
                term_size(term, cfg.height, cfg.width, cfg.savelines);

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

                nexflag = exflag;
                if (cfg.alwaysontop != prev_cfg.alwaysontop) {
                  if (cfg.alwaysontop) {
                      nexflag |= WS_EX_TOPMOST;
                      SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0,
                               SWP_NOMOVE | SWP_NOSIZE);
                  } else {
                      nexflag &= ~(WS_EX_TOPMOST);
                      SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, 0, 0,
                               SWP_NOMOVE | SWP_NOSIZE);
                  }
                }
                if (cfg.sunken_edge)
                  nexflag |= WS_EX_CLIENTEDGE;
                else
                  nexflag &= ~(WS_EX_CLIENTEDGE);

                nflg = flag;
                if (is_full_screen() ?
                  cfg.scrollbar_in_fullscreen : cfg.scrollbar)
                  nflg |= WS_VSCROLL;
                else
                  nflg &= ~WS_VSCROLL;

                if (cfg.resize_action == RESIZE_DISABLED ||
                        is_full_screen())
                  nflg &= ~WS_THICKFRAME;
                else
                  nflg |= WS_THICKFRAME;

                if (cfg.resize_action == RESIZE_DISABLED)
                  nflg &= ~WS_MAXIMIZEBOX;
                else
                  nflg |= WS_MAXIMIZEBOX;

                if (nflg != flag || nexflag != exflag) {
                  if (nflg != flag)
                      SetWindowLong(hwnd, GWL_STYLE, nflg);
                  if (nexflag != exflag)
                      SetWindowLong(hwnd, GWL_EXSTYLE, nexflag);

                  SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
                             SWP_NOACTIVATE | SWP_NOCOPYBITS |
                             SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
                             SWP_FRAMECHANGED);

                  init_lvl = 2;
                }
            }

            /* Oops */
            if (cfg.resize_action == RESIZE_DISABLED && IsZoomed(hwnd)) {
                force_normal(hwnd);
                init_lvl = 2;
            }

            set_title(NULL, cfg.wintitle);
            if (IsIconic(hwnd)) {
                SetWindowText(hwnd,
                          cfg.win_name_always ? window_name :
                          icon_name);
            }

            if (strcmp(cfg.font.name, prev_cfg.font.name) != 0 ||
                strcmp(cfg.line_codepage, prev_cfg.line_codepage) != 0 ||
                cfg.font.isbold != prev_cfg.font.isbold ||
                cfg.font.height != prev_cfg.font.height ||
                cfg.font.charset != prev_cfg.font.charset ||
                cfg.vtmode != prev_cfg.vtmode ||
                cfg.bold_colour != prev_cfg.bold_colour ||
                cfg.resize_action == RESIZE_DISABLED ||
                cfg.resize_action == RESIZE_EITHER ||
                (cfg.resize_action != prev_cfg.resize_action))
                init_lvl = 2;

            InvalidateRect(hwnd, NULL, TRUE);
            reset_window(init_lvl);
            net_pending_errors();
          }
          break;
        case IDM_COPYALL:
          term_copyall(term);
          break;
        case IDM_PASTE:
          term_do_paste(term);
          break;
        case IDM_CLRSB:
          term_clrsb(term);
          break;
        case IDM_RESET:
          term_pwron(term);
          ldisc_send(ldisc, NULL, 0, 0);
          break;
        case IDM_ABOUT:
          showabout(hwnd);
          break;
        case IDM_HELP:
          WinHelp(hwnd, help_path,
                    help_has_contents ? HELP_FINDER : HELP_CONTENTS, 0);
          break;
        case SC_MOUSEMENU:
          /*
           * We get this if the System menu has been activated
           * using the mouse.
           */
          show_mouseptr(1);
          break;
          case SC_KEYMENU:
          /*
           * We get this if the System menu has been activated
           * using the keyboard. This might happen from within
           * TranslateKey, in which case it really wants to be
           * followed by a `space' character to actually _bring
           * the menu up_ rather than just sitting there in
           * `ready to appear' state.
           */
          show_mouseptr(1);          /* make sure pointer is visible */
          if( lParam == 0 )
            PostMessage(hwnd, WM_CHAR, ' ', 0);
          break;
        case IDM_FULLSCREEN:
          flip_full_screen();
          break;
        default:
          if (wParam >= IDM_SAVED_MIN && wParam <= IDM_SAVED_MAX) {
            SendMessage(hwnd, WM_SYSCOMMAND, IDM_SAVEDSESS, wParam);
          }
          if (wParam >= IDM_SPECIAL_MIN && wParam <= IDM_SPECIAL_MAX) {
            int i = (wParam - IDM_SPECIAL_MIN) / 0x10;
            int j;
            /*
             * Ensure we haven't been sent a bogus SYSCOMMAND
             * which would cause us to reference invalid memory
             * and crash. Perhaps I'm just too paranoid here.
             */
            for (j = 0; j < i; j++)
                if (!specials || !specials[j].name)
                  break;
            if (j == i) {
                back->special(backhandle, specials[i].code);
                net_pending_errors();
            }
          }
      }
      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))-offset_width) / font_width)
#define TO_CHR_Y(y) ((((y)<0 ? (y)-font_height+1: (y))-offset_height) / font_height)
      case WM_LBUTTONDOWN:
      case WM_MBUTTONDOWN:
      case WM_RBUTTONDOWN:
      case WM_LBUTTONUP:
      case WM_MBUTTONUP:
      case WM_RBUTTONUP:
      if (message == WM_RBUTTONDOWN &&
          ((wParam & MK_CONTROL) || (cfg.mouse_is_xterm == 2))) {
          POINT cursorpos;

          show_mouseptr(1);          /* make sure pointer is visible */
          GetCursorPos(&cursorpos);
          TrackPopupMenu(popup_menus[CTXMENU].menu,
                     TPM_LEFTALIGN | TPM_TOPALIGN | TPM_RIGHTBUTTON,
                     cursorpos.x, cursorpos.y,
                     0, hwnd, NULL);
          break;
      }
      {
          int button, press;

          switch (message) {
            case WM_LBUTTONDOWN:
            button = MBT_LEFT;
            press = 1;
            break;
            case WM_MBUTTONDOWN:
            button = MBT_MIDDLE;
            press = 1;
            break;
            case WM_RBUTTONDOWN:
            button = MBT_RIGHT;
            press = 1;
            break;
            case WM_LBUTTONUP:
            button = MBT_LEFT;
            press = 0;
            break;
            case WM_MBUTTONUP:
            button = MBT_MIDDLE;
            press = 0;
            break;
            case WM_RBUTTONUP:
            button = MBT_RIGHT;
            press = 0;
            break;
            default:
            button = press = 0;    /* shouldn't happen */
          }
          show_mouseptr(1);
          /*
           * Special case: in full-screen mode, if the left
           * button is clicked in the very top left corner of the
           * window, we put up the System menu instead of doing
           * selection.
           */
          {
            char mouse_on_hotspot = 0;
            POINT pt;

            GetCursorPos(&pt);
#ifndef NO_MULTIMON
            {
                HMONITOR mon;
                MONITORINFO mi;

                mon = MonitorFromPoint(pt, MONITOR_DEFAULTTONULL);

                if (mon != NULL) {
                  mi.cbSize = sizeof(MONITORINFO);
                  GetMonitorInfo(mon, &mi);

                  if (mi.rcMonitor.left == pt.x &&
                      mi.rcMonitor.top == pt.y) {
                      mouse_on_hotspot = 1;
                  }
                  CloseHandle(mon);
                }
            }
#else
            if (pt.x == 0 && pt.y == 0) {
                mouse_on_hotspot = 1;
            }
#endif
            if (is_full_screen() && press &&
                button == MBT_LEFT && mouse_on_hotspot) {
                SendMessage(hwnd, WM_SYSCOMMAND, SC_MOUSEMENU,
                        MAKELPARAM(pt.x, pt.y));
                return 0;
            }
          }

          if (press) {
            click(button,
                  TO_CHR_X(X_POS(lParam)), TO_CHR_Y(Y_POS(lParam)),
                  wParam & MK_SHIFT, wParam & MK_CONTROL,
                  is_alt_pressed());
            SetCapture(hwnd);
          } else {
            term_mouse(term, button, translate_button(button), MA_RELEASE,
                     TO_CHR_X(X_POS(lParam)),
                     TO_CHR_Y(Y_POS(lParam)), wParam & MK_SHIFT,
                     wParam & MK_CONTROL, is_alt_pressed());
            ReleaseCapture();
          }
      }
      return 0;
      case WM_MOUSEMOVE:
      {
          /*
           * Windows seems to like to occasionally send MOUSEMOVE
           * events even if the mouse hasn't moved. Don't unhide
           * the mouse pointer in this case.
           */
          static WPARAM wp = 0;
          static LPARAM lp = 0;
          if (wParam != wp || lParam != lp ||
            last_mousemove != WM_MOUSEMOVE) {
            show_mouseptr(1);
            wp = wParam; lp = lParam;
            last_mousemove = WM_MOUSEMOVE;
          }
      }
      /*
       * Add the mouse position and message time to the random
       * number noise.
       */
      noise_ultralight(lParam);

      if (wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON) &&
          GetCapture() == hwnd) {
          Mouse_Button b;
          if (wParam & MK_LBUTTON)
            b = MBT_LEFT;
          else if (wParam & MK_MBUTTON)
            b = MBT_MIDDLE;
          else
            b = MBT_RIGHT;
          term_mouse(term, b, translate_button(b), MA_DRAG,
                   TO_CHR_X(X_POS(lParam)),
                   TO_CHR_Y(Y_POS(lParam)), wParam & MK_SHIFT,
                   wParam & MK_CONTROL, is_alt_pressed());
      }
      return 0;
      case WM_NCMOUSEMOVE:
      {
          static WPARAM wp = 0;
          static LPARAM lp = 0;
          if (wParam != wp || lParam != lp ||
            last_mousemove != WM_NCMOUSEMOVE) {
            show_mouseptr(1);
            wp = wParam; lp = lParam;
            last_mousemove = WM_NCMOUSEMOVE;
          }
      }
      noise_ultralight(lParam);
      break;
      case WM_IGNORE_CLIP:
      ignore_clip = wParam;          /* don't panic on DESTROYCLIPBOARD */
      break;
      case WM_DESTROYCLIPBOARD:
      if (!ignore_clip)
          term_deselect(term);
      ignore_clip = FALSE;
      return 0;
      case WM_PAINT:
      {
          PAINTSTRUCT p;
          HideCaret(hwnd);
          hdc = BeginPaint(hwnd, &p);
          if (pal) {
            SelectPalette(hdc, pal, TRUE);
            RealizePalette(hdc);
          }
          term_paint(term, hdc, 
                   (p.rcPaint.left-offset_width)/font_width,
                   (p.rcPaint.top-offset_height)/font_height,
                   (p.rcPaint.right-offset_width-1)/font_width,
                   (p.rcPaint.bottom-offset_height-1)/font_height,
                   is_alt_pressed());

          if (p.fErase ||
              p.rcPaint.left  < offset_width  ||
            p.rcPaint.top   < offset_height ||
            p.rcPaint.right >= offset_width + font_width*term->cols ||
            p.rcPaint.bottom>= offset_height + font_height*term->rows)
          {
            HBRUSH fillcolour, oldbrush;
            HPEN   edge, oldpen;
            fillcolour = CreateSolidBrush (
                            colours[(ATTR_DEFBG>>ATTR_BGSHIFT)*2]);
            oldbrush = SelectObject(hdc, fillcolour);
            edge = CreatePen(PS_SOLID, 0, 
                            colours[(ATTR_DEFBG>>ATTR_BGSHIFT)*2]);
            oldpen = SelectObject(hdc, edge);

            /*
             * Jordan Russell reports that this apparently
             * ineffectual IntersectClipRect() call masks a
             * Windows NT/2K bug causing strange display
             * problems when the PuTTY window is taller than
             * the primary monitor. It seems harmless enough...
             */
            IntersectClipRect(hdc,
                  p.rcPaint.left, p.rcPaint.top,
                  p.rcPaint.right, p.rcPaint.bottom);

            ExcludeClipRect(hdc, 
                  offset_width, offset_height,
                  offset_width+font_width*term->cols,
                  offset_height+font_height*term->rows);

            Rectangle(hdc, p.rcPaint.left, p.rcPaint.top, 
                    p.rcPaint.right, p.rcPaint.bottom);

            // SelectClipRgn(hdc, NULL);

            SelectObject(hdc, oldbrush);
            DeleteObject(fillcolour);
            SelectObject(hdc, oldpen);
            DeleteObject(edge);
          }
          SelectObject(hdc, GetStockObject(SYSTEM_FONT));
          SelectObject(hdc, GetStockObject(WHITE_PEN));
          EndPaint(hwnd, &p);
          ShowCaret(hwnd);
      }
      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;
      if (WSAGETSELECTEVENT(lParam) != FD_READ)
          enact_pending_netevent();

      time(&last_movement);
      return 0;
      case WM_SETFOCUS:
      term->has_focus = TRUE;
      CreateCaret(hwnd, caretbm, font_width, font_height);
      ShowCaret(hwnd);
      flash_window(0);         /* stop */
      compose_state = 0;
      term_out(term);
      term_update(term);
      break;
      case WM_KILLFOCUS:
      show_mouseptr(1);
      term->has_focus = FALSE;
      DestroyCaret();
      caret_x = caret_y = -1;        /* ensure caret is replaced next time */
      term_out(term);
      term_update(term);
      break;
      case WM_ENTERSIZEMOVE:
#ifdef RDB_DEBUG_PATCH
      debug((27, "WM_ENTERSIZEMOVE"));
#endif
      EnableSizeTip(1);
      resizing = TRUE;
      need_backend_resize = FALSE;
      break;
      case WM_EXITSIZEMOVE:
      EnableSizeTip(0);
      resizing = FALSE;
#ifdef RDB_DEBUG_PATCH
      debug((27, "WM_EXITSIZEMOVE"));
#endif
      if (need_backend_resize) {
          term_size(term, cfg.height, cfg.width, cfg.savelines);
          InvalidateRect(hwnd, NULL, TRUE);
      }
      break;
      case WM_SIZING:
      /*
       * This does two jobs:
       * 1) Keep the sizetip uptodate
       * 2) Make sure the window size is _stepped_ in units of the font size.
       */
      if (cfg.resize_action != RESIZE_FONT && !is_alt_pressed()) {
          int width, height, w, h, ew, eh;
          LPRECT r = (LPRECT) lParam;

          if ( !need_backend_resize && cfg.resize_action == RESIZE_EITHER &&
                (cfg.height != term->rows || cfg.width != term->cols )) {
            /* 
             * Great! It seems that both the terminal size and the
             * font size have been changed and the user is now dragging.
             * 
             * It will now be difficult to get back to the configured
             * font size!
             *
             * This would be easier but it seems to be too confusing.

            term_size(term, cfg.height, cfg.width, cfg.savelines);
            reset_window(2);
             */
              cfg.height=term->rows; cfg.width=term->cols;

            InvalidateRect(hwnd, NULL, TRUE);
            need_backend_resize = TRUE;
          }

          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;
      } else {
          int width, height, w, h, rv = 0;
          int ex_width = extra_width + (cfg.window_border - offset_width) * 2;
          int ex_height = extra_height + (cfg.window_border - offset_height) * 2;
          LPRECT r = (LPRECT) lParam;

          width = r->right - r->left - ex_width;
          height = r->bottom - r->top - ex_height;

          w = (width + term->cols/2)/term->cols;
          h = (height + term->rows/2)/term->rows;
          if ( r->right != r->left + w*term->cols + ex_width)
            rv = 1;

          if (wParam == WMSZ_LEFT ||
            wParam == WMSZ_BOTTOMLEFT || wParam == WMSZ_TOPLEFT)
            r->left = r->right - w*term->cols - ex_width;
          else
            r->right = r->left + w*term->cols + ex_width;

          if (r->bottom != r->top + h*term->rows + ex_height)
            rv = 1;

          if (wParam == WMSZ_TOP ||
            wParam == WMSZ_TOPRIGHT || wParam == WMSZ_TOPLEFT)
            r->top = r->bottom - h*term->rows - ex_height;
          else
            r->bottom = r->top + h*term->rows + ex_height;

          return rv;
      }
      /* break;  (never reached) */
      case WM_FULLSCR_ON_MAX:
      fullscr_on_max = TRUE;
      break;
      case WM_MOVE:
      sys_cursor_update();
      break;
      case WM_SIZE:
#ifdef RDB_DEBUG_PATCH
      debug((27, "WM_SIZE %s (%d,%d)",
            (wParam == SIZE_MINIMIZED) ? "SIZE_MINIMIZED":
            (wParam == SIZE_MAXIMIZED) ? "SIZE_MAXIMIZED":
            (wParam == SIZE_RESTORED && resizing) ? "to":
            (wParam == SIZE_RESTORED) ? "SIZE_RESTORED":
            "...",
          LOWORD(lParam), HIWORD(lParam)));
#endif
      if (wParam == SIZE_MINIMIZED)
          SetWindowText(hwnd,
                    cfg.win_name_always ? window_name : icon_name);
      if (wParam == SIZE_RESTORED || wParam == SIZE_MAXIMIZED)
          SetWindowText(hwnd, window_name);
        if (wParam == SIZE_RESTORED)
            clear_full_screen();
        if (wParam == SIZE_MAXIMIZED && fullscr_on_max) {
            fullscr_on_max = FALSE;
            make_full_screen();
        }

      if (cfg.resize_action == RESIZE_DISABLED) {
          /* A resize, well it better be a minimize. */
          reset_window(-1);
      } else {

          int width, height, w, h;

          width = LOWORD(lParam);
          height = HIWORD(lParam);

          if (!resizing) {
            if (wParam == SIZE_MAXIMIZED && !was_zoomed) {
                was_zoomed = 1;
                prev_rows = term->rows;
                prev_cols = term->cols;
                if (cfg.resize_action == RESIZE_TERM) {
                  w = width / font_width;
                  if (w < 1) w = 1;
                  h = height / font_height;
                  if (h < 1) h = 1;

                  term_size(term, h, w, cfg.savelines);
                }
                reset_window(0);
            } else if (wParam == SIZE_RESTORED && was_zoomed) {
                was_zoomed = 0;
                if (cfg.resize_action == RESIZE_TERM)
                  term_size(term, prev_rows, prev_cols, cfg.savelines);
                if (cfg.resize_action != RESIZE_FONT)
                  reset_window(2);
                else
                  reset_window(0);
            }
            /* This is an unexpected resize, these will normally happen
             * if the window is too large. Probably either the user
             * selected a huge font or the screen size has changed.
             *
             * This is also called with minimize.
             */
            else reset_window(-1);
          }

          /*
           * Don't call back->size in mid-resize. (To prevent
           * massive numbers of resize events getting sent
           * down the connection during an NT opaque drag.)
           */
          if (resizing) {
            if (cfg.resize_action != RESIZE_FONT && !is_alt_pressed()) {
                need_backend_resize = TRUE;
                w = (width-cfg.window_border*2) / font_width;
                if (w < 1) w = 1;
                h = (height-cfg.window_border*2) / font_height;
                if (h < 1) h = 1;

                cfg.height = h;
                cfg.width = w;
              } else 
                reset_window(0);
          }
      }
      sys_cursor_update();
      return 0;
      case WM_VSCROLL:
      switch (LOWORD(wParam)) {
        case SB_BOTTOM:
          term_scroll(term, -1, 0);
          break;
        case SB_TOP:
          term_scroll(term, +1, 0);
          break;
        case SB_LINEDOWN:
          term_scroll(term, 0, +1);
          break;
        case SB_LINEUP:
          term_scroll(term, 0, -1);
          break;
        case SB_PAGEDOWN:
          term_scroll(term, 0, +term->rows / 2);
          break;
        case SB_PAGEUP:
          term_scroll(term, 0, -term->rows / 2);
          break;
        case SB_THUMBPOSITION:
        case SB_THUMBTRACK:
          term_scroll(term, 1, HIWORD(wParam));
          break;
      }
      break;
      case WM_PALETTECHANGED:
      if ((HWND) wParam != hwnd && pal != NULL) {
          HDC hdc = get_ctx(NULL);
          if (hdc) {
            if (RealizePalette(hdc) > 0)
                UpdateColors(hdc);
            free_ctx(hdc);
          }
      }
      break;
      case WM_QUERYNEWPALETTE:
      if (pal != NULL) {
          HDC hdc = get_ctx(NULL);
          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.
       */
      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;

          if (wParam == VK_PROCESSKEY) {
            MSG m;
            m.hwnd = hwnd;
            m.message = WM_KEYDOWN;
            m.wParam = wParam;
            m.lParam = lParam & 0xdfff;
            TranslateMessage(&m);
          } else {
            len = TranslateKey(message, wParam, lParam, buf);
            if (len == -1)
                return DefWindowProc(hwnd, message, wParam, lParam);

            if (len != 0) {
                /*
                 * Interrupt an ongoing paste. I'm not sure
                 * this is sensible, but for the moment it's
                 * preferable to having to faff about buffering
                 * things.
                 */
                term_nopaste(term);

                /*
                 * We need not bother about stdin backlogs
                 * here, because in GUI PuTTY we can't do
                 * anything about it anyway; there's no means
                 * of asking Windows to hold off on KEYDOWN
                 * messages. We _have_ to buffer everything
                 * we're sent.
                 */
                term_seen_key_event(term);
                ldisc_send(ldisc, buf, len, 1);
                show_mouseptr(0);
            }
          }
      }
      net_pending_errors();
      return 0;
      case WM_INPUTLANGCHANGE:
      /* wParam == Font number */
      /* lParam == Locale */
      set_input_locale((HKL)lParam);
      sys_cursor_update();
      break;
      case WM_IME_NOTIFY:
      if(wParam == IMN_SETOPENSTATUS) {
          HIMC hImc = ImmGetContext(hwnd);
          ImmSetCompositionFont(hImc, &lfont);
          ImmReleaseContext(hwnd, hImc);
          return 0;
      }
      break;
      case WM_IME_COMPOSITION:
      {
          HIMC hIMC;
          int n;
          char *buff;

          if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS || 
              osVersion.dwPlatformId == VER_PLATFORM_WIN32s) break; /* no Unicode */

          if ((lParam & GCS_RESULTSTR) == 0) /* Composition unfinished. */
            break; /* fall back to DefWindowProc */

          hIMC = ImmGetContext(hwnd);
          n = ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, NULL, 0);

          if (n > 0) {
            int i;
            buff = snewn(n, char);
            ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, buff, n);
            /*
             * Jaeyoun Chung reports that Korean character
             * input doesn't work correctly if we do a single
             * luni_send() covering the whole of buff. So
             * instead we luni_send the characters one by one.
             */
            term_seen_key_event(term);
            for (i = 0; i < n; i += 2) {
                luni_send(ldisc, (unsigned short *)(buff+i), 1, 1);
            }
            free(buff);
          }
          ImmReleaseContext(hwnd, hIMC);
          return 1;
      }

      case WM_IME_CHAR:
      if (wParam & 0xFF00) {
          unsigned char buf[2];

          buf[1] = wParam;
          buf[0] = wParam >> 8;
          term_seen_key_event(term);
          lpage_send(ldisc, kbd_codepage, buf, 2, 1);
      } else {
          char c = (unsigned char) wParam;
          term_seen_key_event(term);
          lpage_send(ldisc, kbd_codepage, &c, 1, 1);
      }
      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 = (unsigned char)wParam;
          term_seen_key_event(term);
          lpage_send(ldisc, CP_ACP, &c, 1, 1);
      }
      return 0;
      case WM_SETCURSOR:
      if (send_raw_mouse && LOWORD(lParam) == HTCLIENT) {
          SetCursor(LoadCursor(NULL, IDC_ARROW));
          return TRUE;
      }
      break;
      case WM_AGENT_CALLBACK:
      {
          struct agent_callback *c = (struct agent_callback *)lParam;
          c->callback(c->callback_ctx, c->data, c->len);
          sfree(c);
      }
      return 0;
      default:
      if (message == wm_mousewheel || message == WM_MOUSEWHEEL) {
          int shift_pressed=0, control_pressed=0;

          if (message == WM_MOUSEWHEEL) {
            wheel_accumulator += (short)HIWORD(wParam);
            shift_pressed=LOWORD(wParam) & MK_SHIFT;
            control_pressed=LOWORD(wParam) & MK_CONTROL;
          } else {
            BYTE keys[256];
            wheel_accumulator += (int)wParam;
            if (GetKeyboardState(keys)!=0) {
                shift_pressed=keys[VK_SHIFT]&0x80;
                control_pressed=keys[VK_CONTROL]&0x80;
            }
          }

          /* process events when the threshold is reached */
          while (abs(wheel_accumulator) >= WHEEL_DELTA) {
            int b;

            /* reduce amount for next time */
            if (wheel_accumulator > 0) {
                b = MBT_WHEEL_UP;
                wheel_accumulator -= WHEEL_DELTA;
            } else if (wheel_accumulator < 0) {
                b = MBT_WHEEL_DOWN;
                wheel_accumulator += WHEEL_DELTA;
            } else
                break;

            if (send_raw_mouse &&
                !(cfg.mouse_override && shift_pressed)) {
                /* send a mouse-down followed by a mouse up */
                term_mouse(term, b, translate_button(b),
                         MA_CLICK,
                         TO_CHR_X(X_POS(lParam)),
                         TO_CHR_Y(Y_POS(lParam)), shift_pressed,
                         control_pressed, is_alt_pressed());
                term_mouse(term, b, translate_button(b),
                         MA_RELEASE, TO_CHR_X(X_POS(lParam)),
                         TO_CHR_Y(Y_POS(lParam)), shift_pressed,
                         control_pressed, is_alt_pressed());
            } else {
                /* trigger a scroll */
                term_scroll(term, 0,
                        b == MBT_WHEEL_UP ?
                        -term->rows / 2 : term->rows / 2);
            }
          }
          return 0;
      }
    }

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

/*
 * Move the system caret. (We maintain one, even though it's
 * invisible, for the benefit of blind people: apparently some
 * helper software tracks the system caret, so we should arrange to
 * have one.)
 */
void sys_cursor(void *frontend, int x, int y)
{
    int cx, cy;

    if (!term->has_focus) return;

    /*
     * Avoid gratuitously re-updating the cursor position and IMM
     * window if there's no actual change required.
     */
    cx = x * font_width + offset_width;
    cy = y * font_height + offset_height;
    if (cx == caret_x && cy == caret_y)
      return;
    caret_x = cx;
    caret_y = cy;

    sys_cursor_update();
}

static void sys_cursor_update(void)
{
    COMPOSITIONFORM cf;
    HIMC hIMC;

    if (!term->has_focus) return;

    if (caret_x < 0 || caret_y < 0)
      return;

    SetCaretPos(caret_x, caret_y);

    /* IMM calls on Win98 and beyond only */
    if(osVersion.dwPlatformId == VER_PLATFORM_WIN32s) return; /* 3.11 */
    
    if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS &&
          osVersion.dwMinorVersion == 0) return; /* 95 */

    /* we should have the IMM functions */
    hIMC = ImmGetContext(hwnd);
    cf.dwStyle = CFS_POINT;
    cf.ptCurrentPos.x = caret_x;
    cf.ptCurrentPos.y = caret_y;
    ImmSetCompositionWindow(hIMC, &cf);

    ImmReleaseContext(hwnd, hIMC);
}

/*
 * 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));
    int char_width = fnt_width;
    int text_adjust = 0;
    static int *IpDx = 0, IpDxLEN = 0;

    if (attr & ATTR_WIDE)
      char_width *= 2;

    if (len > IpDxLEN || IpDx[0] != char_width) {
      int i;
      if (len > IpDxLEN) {
          sfree(IpDx);
          IpDx = snewn(len + 16, int);
          IpDxLEN = (len + 16);
      }
      for (i = 0; i < IpDxLEN; i++)
          IpDx[i] = char_width;
    }

    /* Only want the left half of double width lines */
    if (lattr != LATTR_NORM && x*2 >= term->cols)
      return;

    x *= fnt_width;
    y *= font_height;
    x += offset_width;
    y += offset_height;

    if ((attr & TATTR_ACTCURS) && (cfg.cursor_type == 0 || term->big_cursor)) {
      attr &= ATTR_CUR_AND | (bold_mode != BOLD_COLOURS ? ATTR_BOLD : 0);
      attr ^= ATTR_CUR_XOR;
    }

    nfont = 0;
    if (cfg.vtmode == VT_POORMAN && lattr != LATTR_NORM) {
      /* Assume a poorman font is borken in other ways too. */
      lattr = LATTR_WIDE;
    } else
      switch (lattr) {
        case LATTR_NORM:
          break;
        case LATTR_WIDE:
          nfont |= FONT_WIDE;
          break;
        default:
          nfont |= FONT_WIDE + FONT_HIGH;
          break;
      }
    if (attr & ATTR_NARROW)
      nfont |= FONT_NARROW;

    /* Special hack for the VT100 linedraw glyphs. */
    if ((attr & CSET_MASK) == 0x2300) {
      if (text[0] >= (char) 0xBA && text[0] <= (char) 0xBD) {
          switch ((unsigned char) (text[0])) {
            case 0xBA:
            text_adjust = -2 * font_height / 5;
            break;
            case 0xBB:
            text_adjust = -1 * font_height / 5;
            break;
            case 0xBC:
            text_adjust = font_height / 5;
            break;
            case 0xBD:
            text_adjust = 2 * font_height / 5;
            break;
          }
          if (lattr == LATTR_TOP || lattr == LATTR_BOT)
            text_adjust *= 2;
          attr &= ~CSET_MASK;
          text[0] = (char) (ucsdata.unitab_xterm['q'] & CHAR_MASK);
          attr |= (ucsdata.unitab_xterm['q'] & CSET_MASK);
          if (attr & ATTR_UNDER) {
            attr &= ~ATTR_UNDER;
            force_manual_underline = 1;
          }
      }
    }

    /* Anything left as an original character set is unprintable. */
    if (DIRECT_CHAR(attr)) {
      attr &= ~CSET_MASK;
      attr |= 0xFF00;
      memset(text, 0xFD, len);
    }

    /* OEM CP */
    if ((attr & CSET_MASK) == ATTR_OEMCP)
      nfont |= FONT_OEM;

    nfg = ((attr & ATTR_FGMASK) >> ATTR_FGSHIFT);
    nfg = 2 * (nfg & 0xF) + (nfg & 0x10 ? 1 : 0);
    nbg = ((attr & ATTR_BGMASK) >> ATTR_BGSHIFT);
    nbg = 2 * (nbg & 0xF) + (nbg & 0x10 ? 1 : 0);
    if (bold_mode == BOLD_FONT && (attr & ATTR_BOLD))
      nfont |= FONT_BOLD;
    if (und_mode == UND_FONT && (attr & ATTR_UNDER))
      nfont |= FONT_UNDERLINE;
    another_font(nfont);
    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);
    }
    another_font(nfont);
    if (!fonts[nfont])
      nfont = FONT_NORMAL;
    if (attr & ATTR_REVERSE) {
      t = nfg;
      nfg = nbg;
      nbg = t;
    }
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BOLD))
      nfg |= 1;
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BLINK))
      nbg |= 1;
    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 + char_width * len;
    line_box.bottom = y + font_height;

    /* Only want the left half of double width lines */
    if (line_box.right > font_width*term->cols+offset_width)
      line_box.right = font_width*term->cols+offset_width;

    /* We're using a private area for direct to font. (512 chars.) */
    if (ucsdata.dbcs_screenfont && (attr & CSET_MASK) == ATTR_ACP) {
      /* Ho Hum, dbcs fonts are a PITA! */
      /* To display on W9x I have to convert to UCS */
      static wchar_t *uni_buf = 0;
      static int uni_len = 0;
      int nlen, mptr;
      if (len > uni_len) {
          sfree(uni_buf);
          uni_len = len;
          uni_buf = snewn(uni_len, wchar_t);
      }

      for(nlen = mptr = 0; mptr<len; mptr++) {
          uni_buf[nlen] = 0xFFFD;
          if (IsDBCSLeadByteEx(ucsdata.font_codepage, (BYTE) text[mptr])) {
            IpDx[nlen] += char_width;
              MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
                           text+mptr, 2, uni_buf+nlen, 1);
            mptr++;
          }
          else
          {
              MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS,
                           text+mptr, 1, uni_buf+nlen, 1);
          }
          nlen++;
      }
      if (nlen <= 0)
          return;              /* Eeek! */

      ExtTextOutW(hdc, x,
                y - font_height * (lattr == LATTR_BOT) + text_adjust,
                ETO_CLIPPED | ETO_OPAQUE, &line_box, uni_buf, nlen, IpDx);
      if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
          SetBkMode(hdc, TRANSPARENT);
          ExtTextOutW(hdc, x - 1,
                  y - font_height * (lattr ==
                                 LATTR_BOT) + text_adjust,
                  ETO_CLIPPED, &line_box, uni_buf, nlen, IpDx);
      }

      IpDx[0] = -1;
    } else if (DIRECT_FONT(attr)) {
      ExtTextOut(hdc, x,
               y - font_height * (lattr == LATTR_BOT) + text_adjust,
               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 - font_height * (lattr ==
                                LATTR_BOT) + text_adjust,
                   ETO_CLIPPED, &line_box, text, len, IpDx);
      }
    } else {
      /* And 'normal' unicode characters */
      static WCHAR *wbuf = NULL;
      static int wlen = 0;
      int i;
      if (wlen < len) {
          sfree(wbuf);
          wlen = len;
          wbuf = snewn(wlen, WCHAR);
      }
      for (i = 0; i < len; i++)
          wbuf[i] = (WCHAR) ((attr & CSET_MASK) + (text[i] & CHAR_MASK));

      ExtTextOutW(hdc, x,
                y - font_height * (lattr == LATTR_BOT) + text_adjust,
                ETO_CLIPPED | ETO_OPAQUE, &line_box, wbuf, len, IpDx);

      /* And the shadow bold hack. */
      if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD)) {
          SetBkMode(hdc, TRANSPARENT);
          ExtTextOutW(hdc, x - 1,
                  y - font_height * (lattr ==
                                 LATTR_BOT) + text_adjust,
                  ETO_CLIPPED, &line_box, wbuf, len, IpDx);
      }
    }
    if (lattr != LATTR_TOP && (force_manual_underline ||
                         (und_mode == UND_LINE
                        && (attr & ATTR_UNDER)))) {
      HPEN oldpen;
      int dec = descent;
      if (lattr == LATTR_BOT)
          dec = dec * 2 - font_height;

      oldpen = SelectObject(hdc, CreatePen(PS_SOLID, 0, fg));
      MoveToEx(hdc, x, y + dec, NULL);
      LineTo(hdc, x + len * char_width, y + dec);
      oldpen = SelectObject(hdc, oldpen);
      DeleteObject(oldpen);
    }
}

void do_cursor(Context ctx, int x, int y, char *text, int len,
             unsigned long attr, int lattr)
{

    int fnt_width;
    int char_width;
    HDC hdc = ctx;
    int ctype = cfg.cursor_type;

    if ((attr & TATTR_ACTCURS) && (ctype == 0 || term->big_cursor)) {
      if (((attr & CSET_MASK) | (unsigned char) *text) != UCSWIDE) {
          do_text(ctx, x, y, text, len, attr, lattr);
          return;
      }
      ctype = 2;
      attr |= TATTR_RIGHTCURS;
    }

    fnt_width = char_width = font_width * (1 + (lattr != LATTR_NORM));
    if (attr & ATTR_WIDE)
      char_width *= 2;
    x *= fnt_width;
    y *= font_height;
    x += offset_width;
    y += offset_height;

    if ((attr & TATTR_PASCURS) && (ctype == 0 || term->big_cursor)) {
      POINT pts[5];
      HPEN oldpen;
      pts[0].x = pts[1].x = pts[4].x = x;
      pts[2].x = pts[3].x = x + char_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);
    } else if ((attr & (TATTR_ACTCURS | TATTR_PASCURS)) && ctype != 0) {
      int startx, starty, dx, dy, length, i;
      if (ctype == 1) {
          startx = x;
          starty = y + descent;
          dx = 1;
          dy = 0;
          length = char_width;
      } else {
          int xadjust = 0;
          if (attr & TATTR_RIGHTCURS)
            xadjust = char_width - 1;
          startx = x + xadjust;
          starty = y;
          dx = 0;
          dy = 1;
          length = font_height;
      }
      if (attr & TATTR_ACTCURS) {
          HPEN oldpen;
          oldpen =
            SelectObject(hdc, CreatePen(PS_SOLID, 0, colours[23]));
          MoveToEx(hdc, startx, starty, NULL);
          LineTo(hdc, startx + dx * length, starty + dy * length);
          oldpen = SelectObject(hdc, oldpen);
          DeleteObject(oldpen);
      } else {
          for (i = 0; i < length; i++) {
            if (i % 2 == 0) {
                SetPixel(hdc, startx, starty, colours[23]);
            }
            startx += dx;
            starty += dy;
          }
      }
    }
}

/* This function gets the actual width of a character in the normal font.
 */
int char_width(Context ctx, int uc) {
    HDC hdc = ctx;
    int ibuf = 0;

    /* If the font max is the same as the font ave width then this
     * function is a no-op.
     */
    if (!font_dualwidth) return 1;

    switch (uc & CSET_MASK) {
      case ATTR_ASCII:
      uc = ucsdata.unitab_line[uc & 0xFF];
      break;
      case ATTR_LINEDRW:
      uc = ucsdata.unitab_xterm[uc & 0xFF];
      break;
      case ATTR_SCOACS:
      uc = ucsdata.unitab_scoacs[uc & 0xFF];
      break;
    }
    if (DIRECT_FONT(uc)) {
      if (ucsdata.dbcs_screenfont) return 1;

      /* Speedup, I know of no font where ascii is the wrong width */
      if ((uc&CHAR_MASK) >= ' ' && (uc&CHAR_MASK)<= '~') 
          return 1;

      if ( (uc & CSET_MASK) == ATTR_ACP ) {
          SelectObject(hdc, fonts[FONT_NORMAL]);
      } else if ( (uc & CSET_MASK) == ATTR_OEMCP ) {
          another_font(FONT_OEM);
          if (!fonts[FONT_OEM]) return 0;

          SelectObject(hdc, fonts[FONT_OEM]);
      } else
          return 0;

      if ( GetCharWidth32(hdc, uc&CHAR_MASK, uc&CHAR_MASK, &ibuf) != 1 && 
           GetCharWidth(hdc, uc&CHAR_MASK, uc&CHAR_MASK, &ibuf) != 1)
          return 0;
    } else {
      /* Speedup, I know of no font where ascii is the wrong width */
      if (uc >= ' ' && uc <= '~') return 1;

      SelectObject(hdc, fonts[FONT_NORMAL]);
      if ( GetCharWidth32W(hdc, uc, uc, &ibuf) == 1 )
          /* Okay that one worked */ ;
      else if ( GetCharWidthW(hdc, uc, uc, &ibuf) == 1 )
          /* This should work on 9x too, but it's "less accurate" */ ;
      else
          return 0;
    }

    ibuf += font_width / 2 -1;
    ibuf /= font_width;

    return ibuf;
}

/*
 * 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 int alt_sum = 0;

    HKL kbd_layout = GetKeyboardLayout(0);

    /* keys is for ToAsciiEx. There's some ick here, see below. */
    static WORD keys[3];
    static int compose_char = 0;
    static WPARAM compose_key = 0;

    r = GetKeyboardState(keystate);
    if (!r)
      memset(keystate, 0, sizeof(keystate));
    else {
#if 0
#define SHOW_TOASCII_RESULT
      {                        /* Tell us all about key events */
          static BYTE oldstate[256];
          static int first = 1;
          static int scan;
          int ch;
          if (first)
            memcpy(oldstate, keystate, sizeof(oldstate));
          first = 0;

          if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT) {
            debug(("+"));
          } else if ((HIWORD(lParam) & KF_UP)
                   && scan == (HIWORD(lParam) & 0xFF)) {
            debug((". U"));
          } else {
            debug((".\n"));
            if (wParam >= VK_F1 && wParam <= VK_F20)
                debug(("K_F%d", wParam + 1 - VK_F1));
            else
                switch (wParam) {
                  case VK_SHIFT:
                  debug(("SHIFT"));
                  break;
                  case VK_CONTROL:
                  debug(("CTRL"));
                  break;
                  case VK_MENU:
                  debug(("ALT"));
                  break;
                  default:
                  debug(("VK_%02x", wParam));
                }
            if (message == WM_SYSKEYDOWN || message == WM_SYSKEYUP)
                debug(("*"));
            debug((", S%02x", scan = (HIWORD(lParam) & 0xFF)));

            ch = MapVirtualKeyEx(wParam, 2, kbd_layout);
            if (ch >= ' ' && ch <= '~')
                debug((", '%c'", ch));
            else if (ch)
                debug((", $%02x", ch));

            if (keys[0])
                debug((", KB0=%02x", keys[0]));
            if (keys[1])
                debug((", KB1=%02x", keys[1]));
            if (keys[2])
                debug((", KB2=%02x", keys[2]));

            if ((keystate[VK_SHIFT] & 0x80) != 0)
                debug((", S"));
            if ((keystate[VK_CONTROL] & 0x80) != 0)
                debug((", C"));
            if ((HIWORD(lParam) & KF_EXTENDED))
                debug((", E"));
            if ((HIWORD(lParam) & KF_UP))
                debug((", U"));
          }

          if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT);
          else if ((HIWORD(lParam) & KF_UP))
            oldstate[wParam & 0xFF] ^= 0x80;
          else
            oldstate[wParam & 0xFF] ^= 0x81;

          for (ch = 0; ch < 256; ch++)
            if (oldstate[ch] != keystate[ch])
                debug((", M%02x=%02x", ch, keystate[ch]));

          memcpy(oldstate, keystate, sizeof(oldstate));
      }
#endif

      if (wParam == VK_MENU && (HIWORD(lParam) & KF_EXTENDED)) {
          keystate[VK_RMENU] = keystate[VK_MENU];
      }


      /* Nastyness with NUMLock - Shift-NUMLock is left alone though */
      if ((cfg.funky_type == 3 ||
           (cfg.funky_type <= 1 && term->app_keypad_keys &&
            !cfg.no_applic_k))
          && 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 (term->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 unless told. */
    if (left_alt && (keystate[VK_CONTROL] & 0x80)) {
      if (cfg.ctrlaltkeys)
          keystate[VK_MENU] = 0;
      else {
          keystate[VK_RMENU] = 0x80;
          left_alt = 0;
      }
    }

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

    /* Note if AltGr was pressed and if it was used as a compose key */
    if (!compose_state) {
      compose_key = 0x100;
      if (cfg.compose_key) {
          if (wParam == VK_MENU && (HIWORD(lParam) & KF_EXTENDED))
            compose_key = wParam;
      }
      if (wParam == VK_APPS)
          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;

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

    /* Sanitize the number pad if not using a PC NumPad */
    if (left_alt || (term->app_keypad_keys && !cfg.no_applic_k
                 && cfg.funky_type != 2)
      || cfg.funky_type == 3 || 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_PRIOR && shift_state == 2) {
          SendMessage(hwnd, WM_VSCROLL, SB_LINEUP, 0);
          return 0;
      }
      if (wParam == VK_NEXT && shift_state == 1) {
          SendMessage(hwnd, WM_VSCROLL, SB_PAGEDOWN, 0);
          return 0;
      }
      if (wParam == VK_NEXT && shift_state == 2) {
          SendMessage(hwnd, WM_VSCROLL, SB_LINEDOWN, 0);
          return 0;
      }
      if (wParam == VK_INSERT && shift_state == 1) {
          term_do_paste(term);
          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_SYSCOMMAND, SC_KEYMENU, 0);
          return -1;
      }
      if (left_alt && wParam == VK_RETURN && cfg.fullscreenonaltenter &&
          (cfg.resize_action != RESIZE_DISABLED)) {
          if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) != KF_REPEAT)
            flip_full_screen();
          return -1;
      }
      /* Control-Numlock for app-keypad mode switch */
      if (wParam == VK_PAUSE && shift_state == 2) {
          term->app_keypad_keys ^= 1;
          return 0;
      }

      /* 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 == 3 ||
            (cfg.funky_type <= 1 &&
             term->app_keypad_keys && !cfg.no_applic_k)) switch (wParam) {
              case VK_EXECUTE:
                xkey = 'P';
                break;
              case VK_DIVIDE:
                xkey = 'Q';
                break;
              case VK_MULTIPLY:
                xkey = 'R';
                break;
              case VK_SUBTRACT:
                xkey = 'S';
                break;
            }
          if (term->app_keypad_keys && !cfg.no_applic_k)
            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 (cfg.funky_type == 2) {
                  if (shift_state)
                      xkey = 'l';
                  else
                      xkey = 'k';
                } else if (shift_state)
                  xkey = 'm';
                else
                  xkey = 'l';
                break;

              case VK_DIVIDE:
                if (cfg.funky_type == 2)
                  xkey = 'o';
                break;
              case VK_MULTIPLY:
                if (cfg.funky_type == 2)
                  xkey = 'j';
                break;
              case VK_SUBTRACT:
                if (cfg.funky_type == 2)
                  xkey = 'm';
                break;

              case VK_RETURN:
                if (HIWORD(lParam) & KF_EXTENDED)
                  xkey = 'M';
                break;
            }
          if (xkey) {
            if (term->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);
          *p++ = 0;
          return -2;
      }
      if (wParam == VK_BACK && shift_state == 1) {    /* Shift Backspace */
          /* We do the opposite of what is configured */
          *p++ = (cfg.bksp_is_delete ? 0x08 : 0x7F);
          *p++ = 0;
          return -2;
      }
      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;
          *p++ = 0;
          return -2;
      }
      if (wParam == VK_PAUSE) {      /* Break/Pause */
          *p++ = 26;
          *p++ = 0;
          return -2;
      }
      /* 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 || wParam == 0xBF)) {
          *p++ = 0x1F;
          return p - output;
      }
      if (shift_state == 2 && wParam == 0xDF) {
          *p++ = 0x1C;
          return p - output;
      }
      if (shift_state == 3 && wParam == 0xDE) {
          *p++ = 0x1E;         /* Ctrl-~ == Ctrl-^ in xterm at least */
          return p - output;
      }
      if (shift_state == 0 && wParam == VK_RETURN && term->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;
      }
      if ((shift_state&2) == 0) switch (wParam) {
        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;
      }
      /* Reorder edit keys to physical order */
      if (cfg.funky_type == 3 && code <= 6)
          code = "\0\2\1\4\5\3\6"[code];

      if (term->vt52_mode && code > 0 && code <= 6) {
          p += sprintf((char *) p, "\x1B%c", " HLMEIG"[code]);
          return p - output;
      }

      if (cfg.funky_type == 5 &&     /* SCO function keys */
          code >= 11 && code <= 34) {
          char codes[] = "MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{";
          int index = 0;
          switch (wParam) {
            case VK_F1: index = 0; break;
            case VK_F2: index = 1; break;
            case VK_F3: index = 2; break;
            case VK_F4: index = 3; break;
            case VK_F5: index = 4; break;
            case VK_F6: index = 5; break;
            case VK_F7: index = 6; break;
            case VK_F8: index = 7; break;
            case VK_F9: index = 8; break;
            case VK_F10: index = 9; break;
            case VK_F11: index = 10; break;
            case VK_F12: index = 11; break;
          }
          if (keystate[VK_SHIFT] & 0x80) index += 12;
          if (keystate[VK_CONTROL] & 0x80) index += 24;
          p += sprintf((char *) p, "\x1B[%c", codes[index]);
          return p - output;
      }
      if (cfg.funky_type == 5 &&     /* SCO small keypad */
          code >= 1 && code <= 6) {
          char codes[] = "HL.FIG";
          if (code == 3) {
            *p++ = '\x7F';
          } else {
            p += sprintf((char *) p, "\x1B[%c", codes[code-1]);
          }
          return p - output;
      }
      if ((term->vt52_mode || cfg.funky_type == 4) && code >= 11 && code <= 24) {
          int offt = 0;
          if (code > 15)
            offt++;
          if (code > 21)
            offt++;
          if (term->vt52_mode)
            p += sprintf((char *) p, "\x1B%c", code + 'P' - 11 - offt);
          else
            p +=
                sprintf((char *) p, "\x1BO%c", code + 'P' - 11 - offt);
          return p - output;
      }
      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) {
          if (term->vt52_mode)
            p += sprintf((char *) p, "\x1B%c", code + 'P' - 11);
          else
            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 (term->vt52_mode)
                p += sprintf((char *) p, "\x1B%c", xkey);
            else {
                int app_flg = (term->app_cursor_keys && !cfg.no_applic_c);
#if 0
                /*
                 * RDB: VT100 & VT102 manuals both state the
                 * app cursor keys only work if the app keypad
                 * is on.
                 * 
                 * SGT: That may well be true, but xterm
                 * disagrees and so does at least one
                 * application, so I've #if'ed this out and the
                 * behaviour is back to PuTTY's original: app
                 * cursor and app keypad are independently
                 * switchable modes. If anyone complains about
                 * _this_ I'll have to put in a configurable
                 * option.
                 */
                if (!term->app_keypad_keys)
                  app_flg = 0;
#endif
                /* Useful mapping of Ctrl-arrows */
                if (shift_state == 2)
                  app_flg = !app_flg;

                if (app_flg)
                  p += sprintf((char *) p, "\x1BO%c", xkey);
                else
                  p += sprintf((char *) p, "\x1B[%c", xkey);
            }
            return p - output;
          }
      }

      /*
       * Finally, deal with Return ourselves. (Win95 seems to
       * foul it up when Alt is pressed, for some reason.)
       */
      if (wParam == VK_RETURN) {     /* Return */
          *p++ = 0x0D;
          *p++ = 0;
          return -2;
      }

      if (left_alt && wParam >= VK_NUMPAD0 && wParam <= VK_NUMPAD9)
          alt_sum = alt_sum * 10 + wParam - VK_NUMPAD0;
      else
          alt_sum = 0;
    }

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

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

      /* XXX how do we know what the max size of the keys array should
       * be is? There's indication on MS' website of an Inquire/InquireEx
       * functioning returning a KBINFO structure which tells us. */
      if (osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT) {
          /* XXX 'keys' parameter is declared in MSDN documentation as
           * 'LPWORD lpChar'.
           * The experience of a French user indicates that on
           * Win98, WORD[] should be passed in, but on Win2K, it should
           * be BYTE[]. German WinXP and my Win2K with "US International"
           * driver corroborate this.
           * Experimentally I've conditionalised the behaviour on the
           * Win9x/NT split, but I suspect it's worse than that.
           * See wishlist item `win-dead-keys' for more horrible detail
           * and speculations. */
          BYTE keybs[3];
          int i;
          r = ToAsciiEx(wParam, scan, keystate, (LPWORD)keybs, 0, kbd_layout);
          for (i=0; i<3; i++) keys[i] = keybs[i];
      } else {
          r = ToAsciiEx(wParam, scan, keystate, keys, 0, kbd_layout);
      }
#ifdef SHOW_TOASCII_RESULT
      if (r == 1 && !key_down) {
          if (alt_sum) {
            if (in_utf(term) || ucsdata.dbcs_screenfont)
                debug((", (U+%04x)", alt_sum));
            else
                debug((", LCH(%d)", alt_sum));
          } else {
            debug((", ACH(%d)", keys[0]));
          }
      } else if (r > 0) {
          int r1;
          debug((", ASC("));
          for (r1 = 0; r1 < r; r1++) {
            debug(("%s%d", r1 ? "," : "", keys[r1]));
          }
          debug((")"));
      }
#endif
      if (r > 0) {
          WCHAR keybuf;

          /*
           * Interrupt an ongoing paste. I'm not sure this is
           * sensible, but for the moment it's preferable to
           * having to faff about buffering things.
           */
          term_nopaste(term);

          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) {
                  MessageBeep(MB_ICONHAND);
                  return 0;
                }
                keybuf = nc;
                term_seen_key_event(term);
                luni_send(ldisc, &keybuf, 1, 1);
                continue;
            }

            compose_state = 0;

            if (!key_down) {
                if (alt_sum) {
                  if (in_utf(term) || ucsdata.dbcs_screenfont) {
                      keybuf = alt_sum;
                      term_seen_key_event(term);
                      luni_send(ldisc, &keybuf, 1, 1);
                  } else {
                      ch = (char) alt_sum;
                      /*
                       * We need not bother about stdin
                       * backlogs here, because in GUI PuTTY
                       * we can't do anything about it
                       * anyway; there's no means of asking
                       * Windows to hold off on KEYDOWN
                       * messages. We _have_ to buffer
                       * everything we're sent.
                       */
                      term_seen_key_event(term);
                      ldisc_send(ldisc, &ch, 1, 1);
                  }
                  alt_sum = 0;
                } else {
                  term_seen_key_event(term);
                  lpage_send(ldisc, kbd_codepage, &ch, 1, 1);
                }
            } else {
                if(capsOn && ch < 0x80) {
                  WCHAR cbuf[2];
                  cbuf[0] = 27;
                  cbuf[1] = xlat_uskbd2cyrllic(ch);
                  term_seen_key_event(term);
                  luni_send(ldisc, cbuf+!left_alt, 1+!!left_alt, 1);
                } else {
                  char cbuf[2];
                  cbuf[0] = '\033';
                  cbuf[1] = ch;
                  term_seen_key_event(term);
                  lpage_send(ldisc, kbd_codepage,
                           cbuf+!left_alt, 1+!!left_alt, 1);
                }
            }
            show_mouseptr(0);
          }

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

          return p - output;
      }
      /* If we're definitly not building up an ALT-54321 then clear it */
      if (!left_alt)
          keys[0] = 0;
      /* If we will be using alt_sum fix the 256s */
      else if (keys[0] && (in_utf(term) || ucsdata.dbcs_screenfont))
          keys[0] = 10;
    }

    /*
     * ALT alone may or may not want to bring up the System menu.
     * If it's not meant to, we return 0 on presses or releases of
     * ALT, to show that we've swallowed the keystroke. Otherwise
     * we return -1, which means Windows will give the keystroke
     * its default handling (i.e. bring up the System menu).
     */
    if (wParam == VK_MENU && !cfg.alt_only)
      return 0;

    return -1;
}

void request_paste(void *frontend)
{
    /*
     * In Windows, pasting is synchronous: we can read the
     * clipboard with no difficulty, so request_paste() can just go
     * ahead and paste.
     */
    term_do_paste(term);
}

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

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

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

    if (is_full_screen() ? !cfg.scrollbar_in_fullscreen : !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 *frontend)
{
    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(void *frontend, 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(frontend);
      UnrealizeObject(pal);
      RealizePalette(hdc);
      free_ctx(hdc);
    }
}

void palette_reset(void *frontend)
{
    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(frontend);
      RealizePalette(hdc);
      free_ctx(hdc);
    }
}

void write_aclip(void *frontend, char *data, int len, int must_deselect)
{
    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);

    if (!must_deselect)
      SendMessage(hwnd, WM_IGNORE_CLIP, TRUE, 0);

    if (OpenClipboard(hwnd)) {
      EmptyClipboard();
      SetClipboardData(CF_TEXT, clipdata);
      CloseClipboard();
    } else
      GlobalFree(clipdata);

    if (!must_deselect)
      SendMessage(hwnd, WM_IGNORE_CLIP, FALSE, 0);
}

/*
 * Note: unlike write_aclip() this will not append a nul.
 */
void write_clip(void *frontend, wchar_t * data, int len, int must_deselect)
{
    HGLOBAL clipdata, clipdata2, clipdata3;
    int len2;
    void *lock, *lock2, *lock3;

    len2 = WideCharToMultiByte(CP_ACP, 0, data, len, 0, 0, NULL, NULL);

    clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE,
                     len * sizeof(wchar_t));
    clipdata2 = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len2);

    if (!clipdata || !clipdata2) {
      if (clipdata)
          GlobalFree(clipdata);
      if (clipdata2)
          GlobalFree(clipdata2);
      return;
    }
    if (!(lock = GlobalLock(clipdata)))
      return;
    if (!(lock2 = GlobalLock(clipdata2)))
      return;

    memcpy(lock, data, len * sizeof(wchar_t));
    WideCharToMultiByte(CP_ACP, 0, data, len, lock2, len2, NULL, NULL);

    if (cfg.rtf_paste) {
      wchar_t unitab[256];
      char *rtf = NULL;
      unsigned char *tdata = (unsigned char *)lock2;
      wchar_t *udata = (wchar_t *)lock;
      int rtflen = 0, uindex = 0, tindex = 0;
      int rtfsize = 0;
      int multilen, blen, alen, totallen, i;
      char before[16], after[4];

      get_unitab(CP_ACP, unitab, 0);

      rtfsize = 100 + strlen(cfg.font.name);
      rtf = snewn(rtfsize, char);
      sprintf(rtf, "{\\rtf1\\ansi%d{\\fonttbl\\f0\\fmodern %s;}\\f0",
            GetACP(), cfg.font.name);
      rtflen = strlen(rtf);

      /*
       * We want to construct a piece of RTF that specifies the
       * same Unicode text. To do this we will read back in
       * parallel from the Unicode data in `udata' and the
       * non-Unicode data in `tdata'. For each character in
       * `tdata' which becomes the right thing in `udata' when
       * looked up in `unitab', we just copy straight over from
       * tdata. For each one that doesn't, we must WCToMB it
       * individually and produce a \u escape sequence.
       * 
       * It would probably be more robust to just bite the bullet
       * and WCToMB each individual Unicode character one by one,
       * then MBToWC each one back to see if it was an accurate
       * translation; but that strikes me as a horrifying number
       * of Windows API calls so I want to see if this faster way
       * will work. If it screws up badly we can always revert to
       * the simple and slow way.
       */
      while (tindex < len2 && uindex < len &&
             tdata[tindex] && udata[uindex]) {
          if (tindex + 1 < len2 &&
            tdata[tindex] == '\r' &&
            tdata[tindex+1] == '\n') {
            tindex++;
            uindex++;
          }
          if (unitab[tdata[tindex]] == udata[uindex]) {
            multilen = 1;
            before[0] = '\0';
            after[0] = '\0';
            blen = alen = 0;
          } else {
            multilen = WideCharToMultiByte(CP_ACP, 0, unitab+uindex, 1,
                                     NULL, 0, NULL, NULL);
            if (multilen != 1) {
                blen = sprintf(before, "{\\uc%d\\u%d", multilen,
                           udata[uindex]);
                alen = 1; strcpy(after, "}");
            } else {
                blen = sprintf(before, "\\u%d", udata[uindex]);
                alen = 0; after[0] = '\0';
            }
          }
          assert(tindex + multilen <= len2);
          totallen = blen + alen;
          for (i = 0; i < multilen; i++) {
            if (tdata[tindex+i] == '\\' ||
                tdata[tindex+i] == '{' ||
                tdata[tindex+i] == '}')
                totallen += 2;
            else if (tdata[tindex+i] == 0x0D || tdata[tindex+i] == 0x0A)
                totallen += 6;     /* \par\r\n */
            else if (tdata[tindex+i] > 0x7E || tdata[tindex+i] < 0x20)
                totallen += 4;
            else
                totallen++;
          }

          if (rtfsize < rtflen + totallen + 3) {
            rtfsize = rtflen + totallen + 512;
            rtf = sresize(rtf, rtfsize, char);
          }

          strcpy(rtf + rtflen, before); rtflen += blen;
          for (i = 0; i < multilen; i++) {
            if (tdata[tindex+i] == '\\' ||
                tdata[tindex+i] == '{' ||
                tdata[tindex+i] == '}') {
                rtf[rtflen++] = '\\';
                rtf[rtflen++] = tdata[tindex+i];
            } else if (tdata[tindex+i] == 0x0D || tdata[tindex+i] == 0x0A) {
                rtflen += sprintf(rtf+rtflen, "\\par\r\n");
            } else if (tdata[tindex+i] > 0x7E || tdata[tindex+i] < 0x20) {
                rtflen += sprintf(rtf+rtflen, "\\'%02x", tdata[tindex+i]);
            } else {
                rtf[rtflen++] = tdata[tindex+i];
            }
          }
          strcpy(rtf + rtflen, after); rtflen += alen;

          tindex += multilen;
          uindex++;
      }

      strcpy(rtf + rtflen, "}");
      rtflen += 2;

      clipdata3 = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, rtflen);
      if (clipdata3 && (lock3 = GlobalLock(clipdata3)) != NULL) {
          strcpy(lock3, rtf);
          GlobalUnlock(clipdata3);
      }
      sfree(rtf);
    } else
      clipdata3 = NULL;

    GlobalUnlock(clipdata);
    GlobalUnlock(clipdata2);

    if (!must_deselect)
      SendMessage(hwnd, WM_IGNORE_CLIP, TRUE, 0);

    if (OpenClipboard(hwnd)) {
      EmptyClipboard();
      SetClipboardData(CF_UNICODETEXT, clipdata);
      SetClipboardData(CF_TEXT, clipdata2);
      if (clipdata3)
          SetClipboardData(RegisterClipboardFormat(CF_RTF), clipdata3);
      CloseClipboard();
    } else {
      GlobalFree(clipdata);
      GlobalFree(clipdata2);
    }

    if (!must_deselect)
      SendMessage(hwnd, WM_IGNORE_CLIP, FALSE, 0);
}

void get_clip(void *frontend, wchar_t ** p, int *len)
{
    static HGLOBAL clipdata = NULL;
    static wchar_t *converted = 0;
    wchar_t *p2;

    if (converted) {
      sfree(converted);
      converted = 0;
    }
    if (!p) {
      if (clipdata)
          GlobalUnlock(clipdata);
      clipdata = NULL;
      return;
    } else if (OpenClipboard(NULL)) {
      if ((clipdata = GetClipboardData(CF_UNICODETEXT))) {
          CloseClipboard();
          *p = GlobalLock(clipdata);
          if (*p) {
            for (p2 = *p; *p2; p2++);
            *len = p2 - *p;
            return;
          }
      } else if ( (clipdata = GetClipboardData(CF_TEXT)) ) {
          char *s;
          int i;
          CloseClipboard();
          s = GlobalLock(clipdata);
          i = MultiByteToWideChar(CP_ACP, 0, s, strlen(s) + 1, 0, 0);
          *p = converted = snewn(i, wchar_t);
          MultiByteToWideChar(CP_ACP, 0, s, strlen(s) + 1, converted, i);
          *len = i - 1;
          return;
      } else
          CloseClipboard();
    }

    *p = NULL;
    *len = 0;
}

#if 0
/*
 * Move `lines' lines from position `from' to position `to' in the
 * window.
 */
void optimised_move(void *frontend, int to, int from, int lines)
{
    RECT r;
    int min, max;

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

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

/*
 * Print a message box and perform a fatal exit.
 */
void fatalbox(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);
    cleanup_exit(1);
}

/*
 * Print a modal (Really Bad) message box and perform a fatal exit.
 */
void modalfatalbox(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff,
             MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
    sfree(stuff);
    cleanup_exit(1);
}

/*
 * Manage window caption / taskbar flashing, if enabled.
 * 0 = stop, 1 = maintain, 2 = start
 */
static void flash_window(int mode)
{
    static long last_flash = 0;
    static int flashing = 0;
    if ((mode == 0) || (cfg.beep_ind == B_IND_DISABLED)) {
      /* stop */
      if (flashing) {
          FlashWindow(hwnd, FALSE);
          flashing = 0;
      }

    } else if (mode == 2) {
      /* start */
      if (!flashing) {
          last_flash = GetTickCount();
          flashing = 1;
          FlashWindow(hwnd, TRUE);
      }

    } else if ((mode == 1) && (cfg.beep_ind == B_IND_FLASH)) {
      /* maintain */
      if (flashing) {
          long now = GetTickCount();
          long fdiff = now - last_flash;
          if (fdiff < 0 || fdiff > 450) {
            last_flash = now;
            FlashWindow(hwnd, TRUE);      /* toggle */
          }
      }
    }
}

/*
 * Beep.
 */
void beep(void *frontend, int mode)
{
    if (mode == BELL_DEFAULT) {
      /*
       * For MessageBeep style bells, we want to be careful of
       * timing, because they don't have the nice property of
       * PlaySound bells that each one cancels the previous
       * active one. So we limit the rate to one per 50ms or so.
       */
      static long lastbeep = 0;
      long beepdiff;

      beepdiff = GetTickCount() - lastbeep;
      if (beepdiff >= 0 && beepdiff < 50)
          return;
      MessageBeep(MB_OK);
      /*
       * The above MessageBeep call takes time, so we record the
       * time _after_ it finishes rather than before it starts.
       */
      lastbeep = GetTickCount();
    } else if (mode == BELL_WAVEFILE) {
      if (!PlaySound(cfg.bell_wavefile.path, NULL,
                   SND_ASYNC | SND_FILENAME)) {
          char buf[sizeof(cfg.bell_wavefile.path) + 80];
          char otherbuf[100];
          sprintf(buf, "Unable to play sound file\n%s\n"
                "Using default sound instead", cfg.bell_wavefile.path);
          sprintf(otherbuf, "%.70s Sound Error", appname);
          MessageBox(hwnd, buf, otherbuf,
                   MB_OK | MB_ICONEXCLAMATION);
          cfg.beep = BELL_DEFAULT;
      }
    } else if (mode == BELL_PCSPEAKER) {
      static long lastbeep = 0;
      long beepdiff;

      beepdiff = GetTickCount() - lastbeep;
      if (beepdiff >= 0 && beepdiff < 50)
          return;

      /*
       * We must beep in different ways depending on whether this
       * is a 95-series or NT-series OS.
       */
      if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT)
          Beep(800, 100);
      else
          MessageBeep(-1);
      lastbeep = GetTickCount();
    }
    /* Otherwise, either visual bell or disabled; do nothing here */
    if (!term->has_focus) {
      flash_window(2);         /* start */
    }
}

/*
 * Minimise or restore the window in response to a server-side
 * request.
 */
void set_iconic(void *frontend, int iconic)
{
    if (IsIconic(hwnd)) {
      if (!iconic)
          ShowWindow(hwnd, SW_RESTORE);
    } else {
      if (iconic)
          ShowWindow(hwnd, SW_MINIMIZE);
    }
}

/*
 * Move the window in response to a server-side request.
 */
void move_window(void *frontend, int x, int y)
{
    if (cfg.resize_action == RESIZE_DISABLED || 
        cfg.resize_action == RESIZE_FONT ||
      IsZoomed(hwnd))
       return;

    SetWindowPos(hwnd, NULL, x, y, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
}

/*
 * Move the window to the top or bottom of the z-order in response
 * to a server-side request.
 */
void set_zorder(void *frontend, int top)
{
    if (cfg.alwaysontop)
      return;                        /* ignore */
    SetWindowPos(hwnd, top ? HWND_TOP : HWND_BOTTOM, 0, 0, 0, 0,
             SWP_NOMOVE | SWP_NOSIZE);
}

/*
 * Refresh the window in response to a server-side request.
 */
void refresh_window(void *frontend)
{
    InvalidateRect(hwnd, NULL, TRUE);
}

/*
 * Maximise or restore the window in response to a server-side
 * request.
 */
void set_zoomed(void *frontend, int zoomed)
{
    if (IsZoomed(hwnd)) {
        if (!zoomed)
          ShowWindow(hwnd, SW_RESTORE);
    } else {
      if (zoomed)
          ShowWindow(hwnd, SW_MAXIMIZE);
    }
}

/*
 * Report whether the window is iconic, for terminal reports.
 */
int is_iconic(void *frontend)
{
    return IsIconic(hwnd);
}

/*
 * Report the window's position, for terminal reports.
 */
void get_window_pos(void *frontend, int *x, int *y)
{
    RECT r;
    GetWindowRect(hwnd, &r);
    *x = r.left;
    *y = r.top;
}

/*
 * Report the window's pixel size, for terminal reports.
 */
void get_window_pixels(void *frontend, int *x, int *y)
{
    RECT r;
    GetWindowRect(hwnd, &r);
    *x = r.right - r.left;
    *y = r.bottom - r.top;
}

/*
 * Return the window or icon title.
 */
char *get_window_title(void *frontend, int icon)
{
    return icon ? icon_name : window_name;
}

/*
 * See if we're in full-screen mode.
 */
static int is_full_screen()
{
    if (!IsZoomed(hwnd))
      return FALSE;
    if (GetWindowLong(hwnd, GWL_STYLE) & WS_CAPTION)
      return FALSE;
    return TRUE;
}

/* Get the rect/size of a full screen window using the nearest available
 * monitor in multimon systems; default to something sensible if only
 * one monitor is present. */
static int get_fullscreen_rect(RECT * ss)
{
#if defined(MONITOR_DEFAULTTONEAREST) && !defined(NO_MULTIMON)
      HMONITOR mon;
      MONITORINFO mi;
      mon = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
      mi.cbSize = sizeof(mi);
      GetMonitorInfo(mon, &mi);

      /* structure copy */
      *ss = mi.rcMonitor;
      return TRUE;
#else
/* could also use code like this:
      ss->left = ss->top = 0;
      ss->right = GetSystemMetrics(SM_CXSCREEN);
      ss->bottom = GetSystemMetrics(SM_CYSCREEN);
*/ 
      return GetClientRect(GetDesktopWindow(), ss);
#endif
}


/*
 * Go full-screen. This should only be called when we are already
 * maximised.
 */
static void make_full_screen()
{
    DWORD style;
      RECT ss;

    assert(IsZoomed(hwnd));

      if (is_full_screen())
            return;
      
    /* Remove the window furniture. */
    style = GetWindowLong(hwnd, GWL_STYLE);
    style &= ~(WS_CAPTION | WS_BORDER | WS_THICKFRAME);
    if (cfg.scrollbar_in_fullscreen)
      style |= WS_VSCROLL;
    else
      style &= ~WS_VSCROLL;
    SetWindowLong(hwnd, GWL_STYLE, style);

    /* Resize ourselves to exactly cover the nearest monitor. */
      get_fullscreen_rect(&ss);
    SetWindowPos(hwnd, HWND_TOP, ss.left, ss.top,
                  ss.right - ss.left,
                  ss.bottom - ss.top,
                  SWP_FRAMECHANGED);

    /* Tick the menu item in the System menu. */
    CheckMenuItem(GetSystemMenu(hwnd, FALSE), IDM_FULLSCREEN,
              MF_CHECKED);
}

/*
 * Clear the full-screen attributes.
 */
static void clear_full_screen()
{
    DWORD oldstyle, style;

    /* Reinstate the window furniture. */
    style = oldstyle = GetWindowLong(hwnd, GWL_STYLE);
    style |= WS_CAPTION | WS_BORDER;
    if (cfg.resize_action == RESIZE_DISABLED)
        style &= ~WS_THICKFRAME;
    else
        style |= WS_THICKFRAME;
    if (cfg.scrollbar)
      style |= WS_VSCROLL;
    else
      style &= ~WS_VSCROLL;
    if (style != oldstyle) {
      SetWindowLong(hwnd, GWL_STYLE, style);
      SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
                 SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
                 SWP_FRAMECHANGED);
    }

    /* Untick the menu item in the System menu. */
    CheckMenuItem(GetSystemMenu(hwnd, FALSE), IDM_FULLSCREEN,
              MF_UNCHECKED);
}

/*
 * Toggle full-screen mode.
 */
static void flip_full_screen()
{
    if (is_full_screen()) {
      ShowWindow(hwnd, SW_RESTORE);
    } else if (IsZoomed(hwnd)) {
      make_full_screen();
    } else {
      SendMessage(hwnd, WM_FULLSCR_ON_MAX, 0, 0);
      ShowWindow(hwnd, SW_MAXIMIZE);
    }
}

void frontend_keypress(void *handle)
{
    /*
     * Keypress termination in non-Close-On-Exit mode is not
     * currently supported in PuTTY proper, because the window
     * always has a perfectly good Close button anyway. So we do
     * nothing here.
     */
    return;
}

int from_backend(void *frontend, int is_stderr, const char *data, int len)
{
    return term_data(term, is_stderr, data, len);
}

void agent_schedule_callback(void (*callback)(void *, void *, int),
                       void *callback_ctx, void *data, int len)
{
    struct agent_callback *c = snew(struct agent_callback);
    c->callback = callback;
    c->callback_ctx = callback_ctx;
    c->data = data;
    c->len = len;
    PostMessage(hwnd, WM_AGENT_CALLBACK, 0, (LPARAM)c);
}

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