The R13B03 release.OTP_R13B03

1 files changed, 2259 insertions, 0 deletions

diff --git a/erts/emulator/drivers/win32/win_con.c b/erts/emulator/drivers/win32/win_con.c
new file mode 100644
index 0000000000..2202ca655f
--- /dev/null
+++ b/erts/emulator/drivers/win32/win_con.c
@@ -0,0 +1,2259 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1997-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+
+#define UNICODE 1
+#define _UNICODE 1
+#include <tchar.h>
+#include <stdio.h>
+#include "sys.h"
+#include <windowsx.h>
+#include "resource.h"
+#include "erl_version.h"
+#include <commdlg.h>
+#include <commctrl.h>
+#include "erl_driver.h"
+#include "win_con.h"
+
+#define ALLOC(X) malloc(X)
+#define REALLOC(X,Y) realloc(X,Y)
+#define FREE(X) free(X)
+
+#ifndef STATE_SYSTEM_INVISIBLE
+/* Mingw problem with oleacc.h and WIN32_LEAN_AND_MEAN */
+#define STATE_SYSTEM_INVISIBLE 0x00008000
+#endif
+
+#define WM_CONTEXT      (0x0401)
+#define WM_CONBEEP      (0x0402)
+#define WM_SAVE_PREFS   (0x0403)
+
+#define USER_KEY TEXT("Software\\Ericsson\\Erlang\\") TEXT(ERLANG_VERSION)
+
+#define FRAME_HEIGHT ((2*GetSystemMetrics(SM_CYEDGE))+(2*GetSystemMetrics(SM_CYFRAME))+GetSystemMetrics(SM_CYCAPTION))
+#define FRAME_WIDTH  (2*GetSystemMetrics(SM_CXFRAME)+(2*GetSystemMetrics(SM_CXFRAME))+GetSystemMetrics(SM_CXVSCROLL))
+
+#define LINE_LENGTH canvasColumns
+#define COL(_l) ((_l) % LINE_LENGTH)
+#define LINE(_l) ((_l) / LINE_LENGTH)
+
+#ifdef UNICODE
+/*
+ * We use a character in the invalid unicode range
+ */
+#define SET_CURSOR (0xD8FF) 
+#else
+/*
+ * XXX There is no escape to send a character 0x80.  Fortunately, 
+ * the ttsl driver currently replaces 0x80 with an octal sequence.
+ */
+#define SET_CURSOR (0x80)
+#endif
+
+#define SCAN_CODE_BREAK 0x46	/* scan code for Ctrl-Break */
+
+
+typedef struct ScreenLine_s {
+    struct ScreenLine_s* next;
+    struct ScreenLine_s* prev;
+    int width;
+#ifdef HARDDEBUG
+    int allocated;
+#endif
+    int newline; /* Ends with hard newline: 1, wrapped at end: 0 */
+    TCHAR *text;
+} ScreenLine_t;
+
+extern Uint32 *lbuf;		/* The current line buffer */
+extern int llen;		/* The current line length */
+extern int lpos;
+
+HANDLE console_input_event;
+HANDLE console_thread = NULL;
+
+#define DEF_CANVAS_COLUMNS 80
+#define DEF_CANVAS_ROWS 26
+
+#define BUFSIZE 4096
+#define MAXBUFSIZE 32768
+typedef struct {
+    TCHAR *data; 
+    int size;
+    int wrPos;
+    int rdPos;
+} buffer_t;
+
+static buffer_t inbuf;
+static buffer_t outbuf;
+
+static CHOOSEFONT cf;
+
+static TCHAR szFrameClass[] = TEXT("FrameClass");
+static TCHAR szClientClass[] = TEXT("ClientClass");
+static HWND hFrameWnd;
+static HWND hClientWnd;
+static HWND hTBWnd;
+static HWND hComboWnd;
+static HANDLE console_input;
+static HANDLE console_output;
+static int cxChar,cyChar, cxCharMax;
+static int cxClient,cyClient;
+static int cyToolBar;
+static int iVscrollPos,iHscrollPos;
+static int iVscrollMax,iHscrollMax;
+static int nBufLines;
+static int cur_x;
+static int cur_y;
+static int canvasColumns = DEF_CANVAS_COLUMNS;
+static int canvasRows = DEF_CANVAS_ROWS;
+static ScreenLine_t *buffer_top,*buffer_bottom;
+static ScreenLine_t* cur_line;
+static POINT editBeg,editEnd;
+static BOOL fSelecting = FALSE;
+static BOOL fTextSelected = FALSE;
+static HKEY key;
+static BOOL has_key = FALSE;
+static LOGFONT logfont;
+static DWORD fgColor;
+static DWORD bkgColor;
+static FILE *logfile = NULL;
+static RECT winPos;
+static BOOL toolbarVisible;
+static BOOL destroyed = FALSE;
+
+static int lines_to_save = 1000; /* Maximum number of screen lines to save. */
+
+#define TITLE_BUF_SZ 256
+
+struct title_buf {
+    TCHAR *name;
+    TCHAR buf[TITLE_BUF_SZ];
+};
+
+static TCHAR *erlang_window_title = TEXT("Erlang");
+
+static unsigned __stdcall ConThreadInit(LPVOID param);
+static LRESULT CALLBACK ClientWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
+static LRESULT CALLBACK FrameWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
+static BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam);
+static ScreenLine_t *ConNewLine(void);
+static void DeleteTopLine(void);
+static void ensure_line_below(void);
+static ScreenLine_t *GetLineFromY(int y);
+static void LoadUserPreferences(void);
+static void SaveUserPreferences(void);
+static void set_scroll_info(HWND hwnd);
+static void ConCarriageFeed(int);
+static void ConScrollScreen(void);
+static BOOL ConChooseFont(HWND hwnd);
+static void ConFontInitialize(HWND hwnd);
+static void ConSetFont(HWND hwnd);
+static void ConChooseColor(HWND hwnd);
+static void DrawSelection(HWND hwnd, POINT pt1, POINT pt2);
+static void InvertSelectionArea(HWND hwnd);
+static void OnEditCopy(HWND hwnd);
+static void OnEditPaste(HWND hwnd);
+static void OnEditSelAll(HWND hwnd);
+static void GetFileName(HWND hwnd, TCHAR *pFile);
+static void OpenLogFile(HWND hwnd);
+static void CloseLogFile(HWND hwnd);
+static void LogFileWrite(TCHAR *buf, int n);
+static int write_inbuf(TCHAR *data, int n);
+static void init_buffers(void);
+static void AddToCmdHistory(void);
+static int write_outbuf(TCHAR *data, int num_chars);
+static void ConDrawText(HWND hwnd);
+static BOOL (WINAPI *ctrl_handler)(DWORD);
+static HWND InitToolBar(HWND hwndParent); 
+static void window_title(struct title_buf *);
+static void free_window_title(struct title_buf *);
+static void Client_OnMouseMove(HWND hwnd, int x, int y, UINT keyFlags);
+
+#define CON_VPRINTF_BUF_INC_SIZE 1024
+
+static erts_dsprintf_buf_t *
+grow_con_vprintf_buf(erts_dsprintf_buf_t *dsbufp, size_t need)
+{
+    char *buf;
+    size_t size;
+
+    ASSERT(dsbufp);
+
+    if (!dsbufp->str) {
+	size = (((need + CON_VPRINTF_BUF_INC_SIZE - 1)
+		 / CON_VPRINTF_BUF_INC_SIZE)
+		* CON_VPRINTF_BUF_INC_SIZE);
+	buf = (char *) ALLOC(size * sizeof(char));
+    }
+    else {
+	size_t free_size = dsbufp->size - dsbufp->str_len;
+
+	if (need <= free_size)
+	    return dsbufp;
+
+	size = need - free_size + CON_VPRINTF_BUF_INC_SIZE;
+	size = (((size + CON_VPRINTF_BUF_INC_SIZE - 1)
+		 / CON_VPRINTF_BUF_INC_SIZE)
+		* CON_VPRINTF_BUF_INC_SIZE);
+	size += dsbufp->size;
+	buf = (char *) REALLOC((void *) dsbufp->str,
+			       size * sizeof(char));
+    }
+    if (!buf)
+	return NULL;
+    if (buf != dsbufp->str)
+	dsbufp->str = buf;
+    dsbufp->size = size;
+    return dsbufp;
+}
+
+static int con_vprintf(char *format, va_list arg_list)
+{
+    int res,i;
+    erts_dsprintf_buf_t dsbuf = ERTS_DSPRINTF_BUF_INITER(grow_con_vprintf_buf);
+    res = erts_vdsprintf(&dsbuf, format, arg_list);
+    if (res >= 0) {
+	TCHAR *tmp = ALLOC(dsbuf.str_len*sizeof(TCHAR));
+	for (i=0;i<dsbuf.str_len;++i) {
+	    tmp[i] = dsbuf.str[i];
+	}
+	write_outbuf(tmp, dsbuf.str_len);
+	FREE(tmp);
+    }
+    if (dsbuf.str)
+      FREE((void *) dsbuf.str);
+    return res;
+}
+
+void
+ConInit(void)
+{
+    unsigned tid;
+    
+    console_input = CreateSemaphore(NULL, 0, 1, NULL);
+    console_output = CreateSemaphore(NULL, 0, 1, NULL);
+    console_input_event = CreateManualEvent(FALSE);
+    console_thread = (HANDLE *) _beginthreadex(NULL, 0, 
+					       ConThreadInit,
+					       0, 0, &tid);
+
+    /* Make all erts_*printf on stdout and stderr use con_vprintf */
+    erts_printf_stdout_func = con_vprintf;
+    erts_printf_stderr_func = con_vprintf;
+}
+
+/*
+  ConNormalExit() is called from erl_exit() when the emulator
+  is stopping. If the exit has not been initiated by this 
+  console thread (WM_DESTROY or ID_BREAK), the function must 
+  invoke the console thread to save the user preferences.
+*/
+void
+ConNormalExit(void)
+{
+  if (!destroyed)
+    SendMessage(hFrameWnd, WM_SAVE_PREFS, 0L, 0L);
+}
+
+void
+ConWaitForExit(void)
+{
+    ConPrintf("\n\nAbnormal termination\n");
+    WaitForSingleObject(console_thread, INFINITE);
+}
+
+void ConSetCtrlHandler(BOOL (WINAPI *handler)(DWORD))
+{
+    ctrl_handler = handler;
+}
+
+int ConPutChar(Uint32 c)
+{
+    TCHAR sbuf[1];
+#ifdef HARDDEBUG
+    fprintf(stderr,"ConPutChar: %d\n",(int) c);
+    fflush(stderr);
+#endif
+    sbuf[0] = c;
+    write_outbuf(sbuf, 1);
+    return 1;
+}
+
+static int GetXFromLine(HDC hdc, int hscroll, int xpos,ScreenLine_t *pLine)
+{
+   SIZE size;
+   int hscrollPix = hscroll * cxChar; 
+
+   if (pLine == NULL) {
+       return 0;
+   }
+
+   if (pLine->width < xpos) {
+       return (canvasColumns-hscroll)*cxChar;
+   }
+   /* Not needed (?): SelectObject(hdc,CreateFontIndirect(&logfont)); */
+   if (GetTextExtentPoint32(hdc,pLine->text,xpos,&size)) {
+#ifdef HARDDEBUG
+       fprintf(stderr,"size.cx:%d\n",(int)size.cx);
+       fflush(stderr);
+#endif
+       if (hscrollPix >= size.cx) {
+	   return 0;
+       }
+       return ((int) size.cx) - hscrollPix;
+   } else {
+       return (xpos-hscroll)*cxChar;
+   }
+}
+
+static int GetXFromCurrentY(HDC hdc, int hscroll, int xpos) {
+    return GetXFromLine(hdc, hscroll, xpos, GetLineFromY(cur_y));
+}
+
+void ConSetCursor(int from, int to)
+{   TCHAR cmd[9];
+    int *p;
+    //DebugBreak();
+    cmd[0] = SET_CURSOR;
+    /*
+     * XXX Expect trouble on CPUs which don't allow misaligned read and writes.
+     */
+    p = (int *)&cmd[1];
+    *p++ = from;
+    *p = to;
+    write_outbuf(cmd, 1 + (2*sizeof(int)/sizeof(TCHAR)));
+}
+
+void ConPrintf(char *format, ...)
+{
+    va_list va;
+
+    va_start(va, format);
+    (void) con_vprintf(format, va);
+    va_end(va);
+}
+
+void ConBeep(void)
+{
+    SendMessage(hClientWnd, WM_CONBEEP, 0L, 0L);
+}
+
+int ConReadInput(Uint32 *data, int num_chars)
+{
+    TCHAR *buf;
+    int nread;
+    WaitForSingleObject(console_input,INFINITE);
+    nread = num_chars = min(num_chars,inbuf.wrPos-inbuf.rdPos);
+    buf = &inbuf.data[inbuf.rdPos];
+    inbuf.rdPos += nread;
+    while (nread--) 
+        *data++ = *buf++;
+    if (inbuf.rdPos >= inbuf.wrPos) {
+        inbuf.rdPos = 0;
+        inbuf.wrPos = 0;
+        ResetEvent(console_input_event);
+    }
+    ReleaseSemaphore(console_input,1,NULL);
+    return num_chars;
+}
+
+int ConGetKey(void)
+{
+    Uint32 c;
+    WaitForSingleObject(console_input,INFINITE);
+    ResetEvent(console_input_event);
+    inbuf.rdPos = inbuf.wrPos = 0;
+    ReleaseSemaphore(console_input,1,NULL);
+    WaitForSingleObject(console_input_event,INFINITE);
+    ConReadInput(&c, 1);
+    return (int) c;
+}
+
+int ConGetColumns(void) 
+{
+    return (int) canvasColumns; /* 32bit atomic on windows */
+}
+
+int ConGetRows(void) {
+    return (int) canvasRows;
+}
+
+
+static HINSTANCE hInstance;
+extern HMODULE beam_module;
+
+static unsigned __stdcall
+ConThreadInit(LPVOID param)
+{
+    MSG msg;
+    WNDCLASSEX wndclass;
+    int iCmdShow;
+    STARTUPINFO StartupInfo;
+    HACCEL hAccel;
+    int x, y, w, h;
+    struct title_buf title;
+
+    /*DebugBreak();*/
+    hInstance = GetModuleHandle(NULL);
+    StartupInfo.dwFlags = 0;
+    GetStartupInfo(&StartupInfo);
+    iCmdShow = StartupInfo.dwFlags & STARTF_USESHOWWINDOW ?
+	StartupInfo.wShowWindow : SW_SHOWDEFAULT;
+
+    LoadUserPreferences();
+
+    /* frame window class */
+    wndclass.cbSize	        = sizeof (wndclass);	
+    wndclass.style          = CS_HREDRAW | CS_VREDRAW | CS_BYTEALIGNCLIENT;
+    wndclass.lpfnWndProc    = FrameWndProc;
+    wndclass.cbClsExtra     = 0;
+    wndclass.cbWndExtra     = 0;
+    wndclass.hInstance      = hInstance;
+    wndclass.hIcon          = LoadIcon (hInstance, MAKEINTRESOURCE(1));
+    wndclass.hCursor        = LoadCursor (NULL, IDC_ARROW);
+    wndclass.hbrBackground  = NULL;
+    wndclass.lpszMenuName   = NULL;
+    wndclass.lpszClassName  = szFrameClass;
+    wndclass.hIconSm	    = LoadIcon (hInstance, MAKEINTRESOURCE(1));
+    RegisterClassExW (&wndclass);
+
+    /* client window class */
+    wndclass.cbSize	        = sizeof (wndclass);	
+    wndclass.style          = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+    wndclass.lpfnWndProc    = ClientWndProc;
+    wndclass.cbClsExtra     = 0;
+    wndclass.cbWndExtra     = 0;
+    wndclass.hInstance      = hInstance;
+    wndclass.hIcon          = LoadIcon (hInstance, MAKEINTRESOURCE(1));
+    wndclass.hCursor        = LoadCursor (NULL, IDC_ARROW);
+    wndclass.hbrBackground  = CreateSolidBrush(bkgColor);
+    wndclass.lpszMenuName   = NULL;
+    wndclass.lpszClassName  = szClientClass;
+    wndclass.hIconSm	    = LoadIcon (hInstance, MAKEINTRESOURCE(1));
+    RegisterClassExW (&wndclass);
+
+    InitCommonControls();
+    init_buffers();
+
+    nBufLines = 0;
+    buffer_top = cur_line = ConNewLine();
+    cur_line->next = buffer_bottom = ConNewLine();
+    buffer_bottom->prev = cur_line;
+
+    /* Create Frame Window */
+    window_title(&title);
+    hFrameWnd = CreateWindowEx(0, szFrameClass, title.name,
+			       WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,
+			       CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,	
+			       NULL,LoadMenu(beam_module,MAKEINTRESOURCE(1)),
+			       hInstance,NULL);
+    free_window_title(&title);
+
+    /* XXX OTP-5522:
+       The window position is not saved correctly and if the window
+       is closed when minimized, it's not possible to start werl again
+       with the window open. Temporary fix so far is to ignore saved values
+       and always start with initial settings. */
+    /* Original:   if (winPos.left == -1) {  */
+    /* Temporary:  if (1) { */
+    if (1) {
+
+	/* initial window position */
+	x = 0;
+	y = 0;
+	w = cxChar*LINE_LENGTH+FRAME_WIDTH+GetSystemMetrics(SM_CXVSCROLL);
+	h = cyChar*30+FRAME_HEIGHT;
+    } else {
+	/* saved window position */
+	x = winPos.left;
+	y = winPos.top;
+	w = winPos.right - x;
+	h = winPos.bottom - y;
+    }
+    SetWindowPos(hFrameWnd, NULL, x, y, w, h, SWP_NOZORDER);
+
+    ShowWindow(hFrameWnd, iCmdShow);
+    UpdateWindow(hFrameWnd);
+
+    hAccel = LoadAccelerators(beam_module,MAKEINTRESOURCE(1));
+
+    ReleaseSemaphore(console_input, 1, NULL);
+    ReleaseSemaphore(console_output, 1, NULL);
+
+
+    /* Main message loop */
+    while (GetMessage (&msg, NULL, 0, 0))
+    {
+        if (!TranslateAccelerator(hFrameWnd,hAccel,&msg)) 
+        {
+            TranslateMessage (&msg);
+            DispatchMessage (&msg);
+        }
+    }
+    /*
+       PostQuitMessage() results in WM_QUIT which makes GetMessage()
+       return 0 (which stops the main loop). Before we return from
+       the console thread, the ctrl_handler is called to do erl_exit. 
+    */
+    (*ctrl_handler)(CTRL_CLOSE_EVENT);
+    return msg.wParam;
+}
+
+static LRESULT CALLBACK
+FrameWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
+{
+    RECT r;
+    int cy,i,bufsize;
+    TCHAR c;
+    unsigned long l;
+    TCHAR buf[128];
+    struct title_buf title;
+
+    switch (iMsg) {         
+    case WM_CREATE:
+        /* client window creation */
+	window_title(&title);
+        hClientWnd = CreateWindowEx(WS_EX_CLIENTEDGE, szClientClass, title.name,
+				    WS_CHILD|WS_VISIBLE|WS_VSCROLL|WS_HSCROLL,
+				    CW_USEDEFAULT, CW_USEDEFAULT,
+				    CW_USEDEFAULT, CW_USEDEFAULT,		
+				    hwnd, (HMENU)0, hInstance, NULL);
+	free_window_title(&title);
+        hTBWnd = InitToolBar(hwnd);
+        UpdateWindow (hClientWnd);
+        return 0;
+    case WM_SIZE :
+        if (IsWindowVisible(hTBWnd)) {
+            SendMessage(hTBWnd,TB_AUTOSIZE,0,0L);
+            GetWindowRect(hTBWnd,&r);
+            cy = r.bottom-r.top;
+        } else cy = 0;
+        MoveWindow(hClientWnd,0,cy,LOWORD(lParam),HIWORD(lParam)-cy,TRUE);
+        return 0;
+    case WM_ERASEBKGND:
+        return 1;
+    case WM_SETFOCUS :
+        CreateCaret(hClientWnd, NULL, cxChar, cyChar);
+        SetCaretPos(GetXFromCurrentY(GetDC(hwnd),0,cur_x), (cur_y-iVscrollPos)*cyChar);
+        ShowCaret(hClientWnd);
+        return 0;
+    case WM_KILLFOCUS:
+        HideCaret(hClientWnd);
+        DestroyCaret();
+        return 0;
+    case WM_INITMENUPOPUP :
+        if (lParam == 0)	/* File popup menu */
+        {
+            EnableMenuItem((HMENU)wParam, IDMENU_STARTLOG,
+			   logfile ? MF_GRAYED : MF_ENABLED);
+            EnableMenuItem((HMENU)wParam, IDMENU_STOPLOG,
+			   logfile ? MF_ENABLED : MF_GRAYED);
+            return 0;
+	}
+        else if (lParam == 1)	/* Edit popup menu */
+        {
+            EnableMenuItem((HMENU)wParam, IDMENU_COPY,
+			   fTextSelected ? MF_ENABLED : MF_GRAYED);
+            EnableMenuItem((HMENU)wParam, IDMENU_PASTE,
+			   IsClipboardFormatAvailable(CF_TEXT) ? MF_ENABLED : MF_GRAYED);
+            return 0;
+        }
+        else if (lParam == 3)	/* View popup menu */
+        {
+            CheckMenuItem((HMENU)wParam,IDMENU_TOOLBAR,
+			  IsWindowVisible(hTBWnd) ? MF_CHECKED : MF_UNCHECKED);
+            return 0;
+        }
+        break;
+    case WM_NOTIFY: 
+        switch (((LPNMHDR) lParam)->code) { 
+        case TTN_NEEDTEXT: 
+            {    
+		LPTOOLTIPTEXT lpttt; 
+		lpttt = (LPTOOLTIPTEXT) lParam; 
+		lpttt->hinst = hInstance;
+		/* check for combobox handle */
+		if (lpttt->uFlags&TTF_IDISHWND) {
+		    if ((lpttt->hdr.idFrom == (UINT) hComboWnd)) {
+			lstrcpy(lpttt->lpszText,TEXT("Command History"));
+			break;
+		    }
+		}
+		/* check for toolbar buttons */
+		switch (lpttt->hdr.idFrom) { 
+                case IDMENU_COPY: 
+                    lstrcpy(lpttt->lpszText,TEXT("Copy (Ctrl+C)")); 
+                    break; 
+                case IDMENU_PASTE: 
+                    lstrcpy(lpttt->lpszText,TEXT("Paste (Ctrl+V)")); 
+                    break; 
+		case IDMENU_FONT: 
+                    lstrcpy(lpttt->lpszText,TEXT("Fonts")); 
+                    break; 
+		case IDMENU_ABOUT: 
+                    lstrcpy(lpttt->lpszText,TEXT("Help")); 
+                    break; 
+		} 
+	    }
+        }
+        break; 
+    case WM_COMMAND:
+	switch(LOWORD(wParam))
+	{
+	case IDMENU_STARTLOG:
+            OpenLogFile(hwnd);
+	    return 0;
+	case IDMENU_STOPLOG:
+            CloseLogFile(hwnd);
+	    return 0;
+	case IDMENU_EXIT:
+	    SendMessage(hwnd, WM_CLOSE, 0, 0L);
+	    return 0;
+	case IDMENU_COPY:
+	    if (fTextSelected)
+                OnEditCopy(hClientWnd);
+	    return 0;
+	case IDMENU_PASTE:
+	    OnEditPaste(hClientWnd);
+	    return 0;
+        case IDMENU_SELALL:
+            OnEditSelAll(hClientWnd);
+            return 0;
+	case IDMENU_FONT:
+	    if (ConChooseFont(hClientWnd)) {
+		ConSetFont(hClientWnd);
+	    }
+	    SaveUserPreferences();
+	    return 0;
+        case IDMENU_SELECTBKG:
+            ConChooseColor(hClientWnd);
+	    SaveUserPreferences();
+            return 0;
+        case IDMENU_TOOLBAR:
+            if (toolbarVisible) {
+                ShowWindow(hTBWnd,SW_HIDE);
+		toolbarVisible = FALSE;
+            } else {
+                ShowWindow(hTBWnd,SW_SHOW);
+		toolbarVisible = TRUE;
+	    }
+            GetClientRect(hwnd,&r);
+            PostMessage(hwnd,WM_SIZE,0,MAKELPARAM(r.right,r.bottom));
+            return 0;
+        case IDMENU_ABOUT:
+            DialogBox(beam_module,TEXT("AboutBox"),hwnd,AboutDlgProc);
+            return 0;
+        case ID_COMBOBOX:
+            switch (HIWORD(wParam)) {
+            case CBN_SELENDOK:
+                i = SendMessage(hComboWnd,CB_GETCURSEL,0,0);
+                if (i != CB_ERR) {
+                    buf[0] = 0x01; /* CTRL+A */
+                    buf[1] = 0x0B; /* CTRL+K */
+                    bufsize = SendMessage(hComboWnd,CB_GETLBTEXT,i,(LPARAM)&buf[2]);
+                    if (bufsize != CB_ERR)
+                        write_inbuf(buf,bufsize+2);
+                    SetFocus(hwnd);
+                }
+                break;
+            case CBN_SELENDCANCEL:
+                break;
+            }
+	    break;
+	case ID_BREAK:		  /* CTRL+BRK */
+	    /* pass on break char if the ctrl_handler is disabled */
+	    if ((*ctrl_handler)(CTRL_C_EVENT) == FALSE) {
+		c = 0x03;
+		write_inbuf(&c,1);
+	    }
+	    return 0;
+        }
+        break;
+    case WM_KEYDOWN :
+	switch (wParam) {
+	case VK_UP: c = 'P'-'@'; break;
+	case VK_DOWN : c = 'N'-'@'; break;
+	case VK_RIGHT : c = 'F'-'@'; break;
+	case VK_LEFT : c = 'B'-'@'; break;
+	case VK_DELETE : c = 'D' -'@'; break;
+	case VK_HOME : c = 'A'-'@'; break;
+	case VK_END : c = 'E'-'@'; break;
+        case VK_RETURN : AddToCmdHistory(); return 0;
+	case VK_PRIOR :   /* PageUp */
+	    PostMessage(hClientWnd, WM_VSCROLL, SB_PAGEUP, 0);
+	    return 0;
+	case VK_NEXT :   /* PageDown */
+	    PostMessage(hClientWnd, WM_VSCROLL, SB_PAGEDOWN, 0);
+	    return 0;
+	default: return 0;
+	}
+        write_inbuf(&c, 1);
+	return 0;
+    case WM_CHAR:
+	c = (TCHAR)wParam;
+        write_inbuf(&c,1);
+	return 0;
+    case WM_CLOSE :
+	break;
+    case WM_DESTROY :
+	SaveUserPreferences();
+	destroyed = TRUE;
+	PostQuitMessage(0);
+	return 0;
+    case WM_SAVE_PREFS :
+	SaveUserPreferences();
+	return 0;
+    }
+    return DefWindowProc(hwnd, iMsg, wParam, lParam);
+}
+
+static BOOL
+Client_OnCreate(HWND hwnd, LPCREATESTRUCT lpCreateStruct)
+{
+    ConFontInitialize(hwnd);
+    cur_x = cur_y = 0;
+    iVscrollPos = 0;
+    iHscrollPos = 0;
+    return TRUE;
+}       
+
+static void
+Client_OnPaint(HWND hwnd)
+{
+    ScreenLine_t *pLine;
+    int x,y,i,iTop,iBot;
+    PAINTSTRUCT ps;
+    RECT rcInvalid;
+    HDC hdc;
+
+    hdc = BeginPaint(hwnd, &ps);
+    rcInvalid = ps.rcPaint;
+    hdc = ps.hdc;
+    iTop = max(0, iVscrollPos + rcInvalid.top/cyChar);
+    iBot = min(nBufLines, iVscrollPos + rcInvalid.bottom/cyChar+1);
+    pLine = GetLineFromY(iTop);
+    for (i = iTop; i < iBot && pLine != NULL; i++) {
+      	y = cyChar*(i-iVscrollPos);
+        x = -cxChar*iHscrollPos;
+	TextOut(hdc, x, y, &pLine->text[0], pLine->width);
+        pLine = pLine->next;
+    }
+    if (fTextSelected || fSelecting) {
+	InvertSelectionArea(hwnd);
+    }
+    SetCaretPos(GetXFromCurrentY(hdc,iHscrollPos,cur_x), (cur_y-iVscrollPos)*cyChar);
+    EndPaint(hwnd, &ps);
+}
+#ifdef HARDDEBUG
+static void dump_linebufs(void) {
+    char *buff;
+    ScreenLine_t *s = buffer_top;
+    fprintf(stderr,"LinebufDump------------------------\n");
+    while(s) {
+	if (s == buffer_top) fprintf(stderr,"BT-> ");
+	if (s == buffer_bottom) fprintf(stderr,"BB-> ");
+	if (s == cur_line) fprintf(stderr,"CL-> ");
+
+	buff = (char *) ALLOC(s->width+1);
+	memcpy(buff,s->text,s->width);
+	buff[s->width] = '\0';
+	fprintf(stderr,"{\"%s\",%d,%d}\n",buff,s->newline,s->allocated);
+	FREE(buff);
+	s = s->next;
+    }
+    fprintf(stderr,"LinebufDumpEnd---------------------\n");
+    fflush(stderr);
+}
+#endif	    
+
+static void reorganize_linebufs(HWND hwnd) {
+    ScreenLine_t *otop = buffer_top;
+    ScreenLine_t *obot = buffer_bottom;
+    ScreenLine_t *next;
+    int i,cpos;
+
+    cpos = 0;
+    i = nBufLines - cur_y;
+    while (i > 1) {
+	cpos += obot->width;
+	obot = obot->prev;
+	i--;
+    }
+    cpos += (obot->width - cur_x);
+#ifdef HARDDEBUG
+    fprintf(stderr,"nBufLines = %d, cur_x = %d, cur_y = %d, cpos = %d\n",
+	    nBufLines,cur_x,cur_y,cpos);
+    fflush(stderr);
+#endif
+    
+
+    nBufLines = 0;
+    buffer_top = cur_line = ConNewLine();
+    cur_line->next = buffer_bottom = ConNewLine();
+    buffer_bottom->prev = cur_line;
+    
+    cur_x = cur_y = 0; 
+    iVscrollPos = 0;
+    iHscrollPos = 0;
+
+    while(otop) {
+	for(i=0;i<otop->width;++i) {
+	    cur_line->text[cur_x] = otop->text[i];
+	    cur_x++;
+            if (cur_x > cur_line->width)
+		cur_line->width = cur_x; 
+	    if (GetXFromCurrentY(GetDC(hwnd),0,cur_x) + cxChar > 
+		(LINE_LENGTH * cxChar)) {
+                ConCarriageFeed(0);
+	    }
+	}
+	if (otop->newline) {
+	    ConCarriageFeed(1);
+            /*ConScrollScreen();*/
+	}
+	next = otop->next;
+	FREE(otop->text);
+	FREE(otop);
+	otop = next;
+    }
+    while (cpos) {
+	cur_x--;
+	if (cur_x < 0) {
+	    cur_y--;
+	    cur_line = cur_line->prev;
+	    cur_x = cur_line->width-1;
+	}
+	cpos--;
+    }
+    SetCaretPos(GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x), (cur_y-iVscrollPos)*cyChar);
+#ifdef HARDDEBUG
+    fprintf(stderr,"canvasColumns = %d,nBufLines = %d, cur_x = %d, cur_y = %d\n",
+	    canvasColumns,nBufLines,cur_x,cur_y);
+    fflush(stderr);
+#endif
+}
+	    
+
+static void
+Client_OnSize(HWND hwnd, UINT state, int cx, int cy)
+{
+    RECT r;
+    SCROLLBARINFO sbi;
+    int w,h,columns;
+    int scrollheight;
+    cxClient = cx;
+    cyClient = cy;
+    set_scroll_info(hwnd);
+    GetClientRect(hwnd,&r);
+    w = r.right - r.left;
+    h = r.bottom - r.top;
+    sbi.cbSize = sizeof(SCROLLBARINFO);
+    if (!GetScrollBarInfo(hwnd, OBJID_HSCROLL,&sbi) || 
+	(sbi.rgstate[0] & STATE_SYSTEM_INVISIBLE)) {
+	scrollheight = 0;
+    } else {
+	scrollheight = sbi.rcScrollBar.bottom - sbi.rcScrollBar.top;
+    }
+    canvasRows = (h - scrollheight) / cyChar;
+    if (canvasRows < DEF_CANVAS_ROWS) {
+	canvasRows = DEF_CANVAS_ROWS;
+    }
+    columns = (w - GetSystemMetrics(SM_CXVSCROLL)) /cxChar;
+    if (columns < DEF_CANVAS_COLUMNS)
+	columns = DEF_CANVAS_COLUMNS;
+    if (columns != canvasColumns) {
+	canvasColumns = columns;
+	/*dump_linebufs();*/
+	reorganize_linebufs(hwnd);
+	fSelecting = fTextSelected = FALSE;
+	InvalidateRect(hwnd, NULL, TRUE);
+#ifdef HARDDEBUG
+	fprintf(stderr,"Paint: cols = %d, rows = %d\n",canvasColumns,canvasRows);
+	fflush(stderr);
+#endif
+    }
+    
+    SetCaretPos(GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x), (cur_y-iVscrollPos)*cyChar);
+}
+
+static void calc_charpoint_from_point(HDC dc, int x, int y, int y_offset, POINT *pt) 
+{
+    int r;
+    int hscrollPix = iHscrollPos * cxChar;
+
+    pt->y = y/cyChar + iVscrollPos + y_offset;
+
+    if (x > (LINE_LENGTH-iHscrollPos) * cxChar) {
+	x =  (LINE_LENGTH-iHscrollPos) * cxChar;
+    }
+    if (pt->y - y_offset > 0 && GetLineFromY(pt->y - y_offset) == NULL) {
+	pt->y = nBufLines - 1 + y_offset;
+	pt->x = GetLineFromY(pt->y - y_offset)->width;
+    } else {
+	for (pt->x = 1; 
+	     (r = GetXFromLine(dc, 0, pt->x, GetLineFromY(pt->y - y_offset))) != 0 && 
+		 (r - hscrollPix) < x; 
+	     ++(pt->x))
+	    ;
+	if ((r - hscrollPix) > x)
+	    --(pt->x);
+#ifdef HARD_SEL_DEBUG
+	fprintf(stderr,"pt->x = %d, iHscrollPos = %d\n",(int) pt->x, iHscrollPos);
+	fflush(stderr);
+#endif
+	if (pt->x <= 0) {
+	    pt->x = x/cxChar + iHscrollPos;
+	}
+    }
+}
+
+
+static void
+Client_OnLButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags)
+{
+    int r;
+    SetFocus(GetParent(hwnd));	/* In case combobox steals the focus */
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"OnLButtonDown fSelecting = %d, fTextSelected = %d:\n",
+	    fSelecting,fTextSelected);
+    fflush(stderr);
+#endif
+    if (fTextSelected) {
+	InvertSelectionArea(hwnd);
+    }
+    fTextSelected = FALSE;
+
+    calc_charpoint_from_point(GetDC(hwnd), x, y, 0, &editBeg);
+
+    editEnd.x = editBeg.x;
+    editEnd.y = editBeg.y + 1;
+    fSelecting = TRUE;
+    SetCapture(hwnd);
+}
+
+static void
+Client_OnRButtonDown(HWND hwnd, BOOL fDoubleClick, int x, int y, UINT keyFlags)
+{
+    if (fTextSelected) {
+	fSelecting = TRUE;
+	Client_OnMouseMove(hwnd,x,y,keyFlags);
+	fSelecting = FALSE;
+    }
+}
+
+static void
+Client_OnLButtonUp(HWND hwnd, int x, int y, UINT keyFlags)
+{
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"OnLButtonUp fSelecting = %d, fTextSelected = %d:\n",
+	    fSelecting,fTextSelected);
+    fprintf(stderr,"(Beg.x = %d, Beg.y = %d, " 
+	    "End.x = %d, End.y = %d)\n",editBeg.x,editBeg.y,
+	    editEnd.x,editEnd.y);
+#endif
+    if (fSelecting && 
+	!(editBeg.x == editEnd.x && editBeg.y == (editEnd.y - 1))) {
+	fTextSelected = TRUE;
+    }
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"OnLButtonUp fTextSelected = %d:\n",
+	    fTextSelected);
+    fflush(stderr);
+#endif
+    fSelecting = FALSE;
+    ReleaseCapture();
+}
+
+#define EMPTY_RECT(R) \
+(((R).bottom - (R).top == 0) || ((R).right - (R).left == 0))
+#define ABS(X) (((X)< 0) ? -1 * (X) : X) 
+#define DIFF(A,B) ABS(((int)(A)) - ((int)(B)))
+
+static int diff_sel_area(RECT old[3], RECT new[3], RECT result[6])
+{
+    int absposold = old[0].left + old[0].top * canvasColumns;
+    int absposnew = new[0].left + new[0].top * canvasColumns;
+    int absendold = absposold, absendnew = absposnew;
+    int i, x, ret = 0;
+    int abspos[2],absend[2];
+    for(i = 0; i < 3; ++i) {
+	if (!EMPTY_RECT(old[i])) {
+	    absendold += (old[i].right - old[i].left) * 
+		(old[i].bottom - old[i].top);
+	} 
+	if (!EMPTY_RECT(new[i])) {
+	    absendnew += (new[i].right - new[i].left) * 
+		(new[i].bottom - new[i].top);
+	}
+    }
+    abspos[0] = min(absposold, absposnew);
+    absend[0] = DIFF(absposold, absposnew) + abspos[0];
+    abspos[1] = min(absendold, absendnew);
+    absend[1] = DIFF(absendold, absendnew) + abspos[1];
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"abspos[0] = %d, absend[0] = %d, abspos[1] = %d, absend[1] = %d\n",abspos[0],absend[0],abspos[1],absend[1]);
+    fflush(stderr);
+#endif
+    i = 0;
+    for (x = 0; x < 2; ++x) {
+	if (abspos[x] != absend[x]) {
+	    int consumed = 0;
+	    result[i].left = abspos[x] % canvasColumns;
+	    result[i].top = abspos[x] / canvasColumns;
+	    result[i].bottom = result[i].top + 1;
+	    if ((absend[x] - abspos[x]) + result[i].left < canvasColumns) {
+#ifdef HARD_SEL_DEBUG
+		fprintf(stderr,"Nowrap, %d < canvasColumns\n",
+			(absend[x] - abspos[x]) + result[i].left);
+		fflush(stderr);
+#endif
+		result[i].right = (absend[x] - abspos[x]) + result[i].left;
+		consumed += result[i].right - result[i].left; 
+	    } else {
+#ifdef HARD_SEL_DEBUG
+		fprintf(stderr,"Wrap, %d >= canvasColumns\n",
+			(absend[x] - abspos[x]) + result[i].left);
+		fflush(stderr);
+#endif
+		result[i].right = canvasColumns;
+		consumed += result[i].right - result[i].left;
+		if (absend[x] - abspos[x] - consumed >= canvasColumns) {
+		    ++i;
+		    result[i].top = result[i-1].bottom;
+		    result[i].left = 0;
+		    result[i].right = canvasColumns;
+		    result[i].bottom = (absend[x] - abspos[x] - consumed) / canvasColumns + result[i].top;
+		    consumed += (result[i].bottom - result[i].top) * canvasColumns;
+		}
+		if (absend[x] - abspos[x] - consumed > 0) {
+		    ++i;
+		    result[i].top = result[i-1].bottom;
+		    result[i].bottom = result[i].top + 1;
+		    result[i].left = 0;
+		    result[i].right = absend[x] - abspos[x] - consumed;
+		}
+	    }
+	    ++i;
+	}
+    }
+#ifdef HARD_SEL_DEBUG
+    if (i > 2) {
+	int x;
+	fprintf(stderr,"i = %d\n",i);
+	fflush(stderr);
+	for (x = 0; x < i; ++x) {
+	    fprintf(stderr, "result[%d]: top = %d, left = %d, "
+		    "bottom = %d. right = %d\n",
+		    x, result[x].top, result[x].left,
+		    result[x].bottom, result[x].right);
+	}
+    }
+#endif
+    return i;
+}
+    
+
+
+static void calc_sel_area(RECT rects[3], POINT beg, POINT end) 
+{
+    /* These are not really rects and points, these are character
+       based positions, need to be multiplied by cxChar and cyChar to
+       make up canvas coordinates */
+    memset(rects,0,3*sizeof(RECT));
+    rects[0].left = beg.x;
+    rects[0].top = beg.y;
+    rects[0].bottom = beg.y+1;
+    if (end.y - beg.y == 1) { /* Only one row */
+	rects[0].right = end.x;
+	goto out;
+    }
+    rects[0].right = canvasColumns;
+    if (end.y - beg.y > 2) { 
+	rects[1].left = 0;
+	rects[1].top = rects[0].bottom;
+	rects[1].right = canvasColumns;
+	rects[1].bottom = end.y - 1;
+    }
+    rects[2].left = 0;
+    rects[2].top = end.y - 1;
+    rects[2].bottom = end.y;
+    rects[2].right = end.x;
+
+ out:
+#ifdef HARD_SEL_DEBUG
+    {
+	int i;
+	fprintf(stderr,"beg.x = %d, beg.y = %d, end.x = %d, end.y = %d\n",
+		beg.x,beg.y,end.x,end.y);
+	for (i = 0; i < 3; ++i) {
+	    fprintf(stderr,"[%d] left = %d, top = %d, "
+		    "right = %d, bottom = %d\n",
+		    i, rects[i].left, rects[i].top, 
+		    rects[i].right, rects[i].bottom);
+	}
+	fflush(stderr);
+    }
+#endif
+    return;
+}
+
+static void calc_sel_area_turned(RECT rects[3], POINT eBeg, POINT eEnd) {
+    POINT from,to;
+    if (eBeg.y >=  eEnd.y || 
+	(eBeg.y == eEnd.y - 1 && eBeg.x > eEnd.x)) {
+#ifdef HARD_SEL_DEBUG
+	fprintf(stderr,"Reverting (Beg.x = %d, Beg.y = %d, " 
+		"End.x = %d, End.y = %d)\n",eBeg.x,eBeg.y,
+		eEnd.x,eEnd.y);
+	fflush(stderr);
+#endif
+	from.x = eEnd.x;
+	from.y = eEnd.y - 1;
+	to.x = eBeg.x;
+	to.y = eBeg.y + 1; 
+	calc_sel_area(rects,from,to);
+    } else {
+	calc_sel_area(rects,eBeg,eEnd);
+    }
+}
+ 
+
+static void InvertSelectionArea(HWND hwnd)
+{
+    RECT rects[3];
+    POINT from,to;
+    int i;
+    calc_sel_area_turned(rects,editBeg,editEnd);
+    for (i = 0; i < 3; ++i) {
+	if (!EMPTY_RECT(rects[i])) {
+	    from.x = rects[i].left;
+	    to.x = rects[i].right;
+	    from.y = rects[i].top;
+	    to.y = rects[i].bottom;
+	    DrawSelection(hwnd,from,to);
+	}
+    }
+}
+
+static void
+Client_OnMouseMove(HWND hwnd, int x, int y, UINT keyFlags)
+{
+    if (fSelecting) {
+	RECT rold[3], rnew[3], rupdate[6];
+	int num_updates,i,r;
+	POINT from,to;
+	calc_sel_area_turned(rold,editBeg,editEnd);
+
+	calc_charpoint_from_point(GetDC(hwnd), x, y, 1, &editEnd);
+
+	calc_sel_area_turned(rnew,editBeg,editEnd);
+	num_updates = diff_sel_area(rold,rnew,rupdate);
+	for (i = 0; i < num_updates;++i) {
+	    from.x = rupdate[i].left;
+	    to.x = rupdate[i].right;
+	    from.y = rupdate[i].top;
+	    to.y = rupdate[i].bottom;
+#ifdef HARD_SEL_DEBUG
+	    fprintf(stderr,"from: x=%d,y=%d, to: x=%d, y=%d\n",
+		    from.x, from.y,to.x,to.y);
+	    fflush(stderr);
+#endif
+	    DrawSelection(hwnd,from,to);
+	}
+    }
+}
+
+static void
+Client_OnVScroll(HWND hwnd, HWND hwndCtl, UINT code, int pos)
+{
+    int iVscroll;
+
+    switch(code) {
+    case SB_LINEDOWN:
+	iVscroll = 1;
+	break;
+    case SB_LINEUP:
+	iVscroll = -1;
+	break;
+    case SB_PAGEDOWN:
+	iVscroll = max(1, cyClient/cyChar);
+	break;
+    case SB_PAGEUP:
+	iVscroll = min(-1, -cyClient/cyChar);
+	break;
+    case SB_THUMBTRACK:
+	iVscroll = pos - iVscrollPos;
+	break;
+    default:
+	iVscroll = 0;
+    }
+    iVscroll = max(-iVscrollPos, min(iVscroll, iVscrollMax-iVscrollPos));
+    if (iVscroll != 0) {
+	iVscrollPos += iVscroll;
+	ScrollWindowEx(hwnd, 0, -cyChar*iVscroll, NULL, NULL,
+		       NULL, NULL, SW_ERASE | SW_INVALIDATE);
+	SetScrollPos(hwnd, SB_VERT, iVscrollPos, TRUE);
+	iVscroll = GetScrollPos(hwnd, SB_VERT);
+	UpdateWindow(hwnd);
+    }
+}
+
+static void
+Client_OnHScroll(HWND hwnd, HWND hwndCtl, UINT code, int pos)
+{
+    int iHscroll, curCharWidth = cxClient/cxChar;
+
+    switch(code) {
+    case SB_LINEDOWN:
+	iHscroll = 1;
+	break;
+    case SB_LINEUP:
+	iHscroll = -1;
+	break;
+    case SB_PAGEDOWN:
+	iHscroll = max(1,curCharWidth-1);
+	break;
+    case SB_PAGEUP:
+	iHscroll = min(-1,-(curCharWidth-1));
+	break;
+    case SB_THUMBTRACK:
+	iHscroll = pos - iHscrollPos;
+	break;
+    default:
+	iHscroll = 0;
+    }
+    iHscroll = max(-iHscrollPos, min(iHscroll, iHscrollMax-iHscrollPos-(curCharWidth-1)));
+    if (iHscroll != 0) {
+	iHscrollPos += iHscroll;
+	ScrollWindow(hwnd, -cxChar*iHscroll, 0, NULL, NULL);
+	SetScrollPos(hwnd, SB_HORZ, iHscrollPos, TRUE);
+	UpdateWindow(hwnd);
+    }
+}
+
+static LRESULT CALLBACK
+ClientWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
+{
+    switch (iMsg) {
+	HANDLE_MSG(hwnd, WM_CREATE, Client_OnCreate);
+	HANDLE_MSG(hwnd, WM_SIZE, Client_OnSize);
+	HANDLE_MSG(hwnd, WM_PAINT, Client_OnPaint);
+	HANDLE_MSG(hwnd, WM_LBUTTONDOWN, Client_OnLButtonDown);
+	HANDLE_MSG(hwnd, WM_RBUTTONDOWN, Client_OnRButtonDown);
+	HANDLE_MSG(hwnd, WM_LBUTTONUP, Client_OnLButtonUp);
+	HANDLE_MSG(hwnd, WM_MOUSEMOVE, Client_OnMouseMove);
+	HANDLE_MSG(hwnd, WM_VSCROLL, Client_OnVScroll);
+	HANDLE_MSG(hwnd, WM_HSCROLL, Client_OnHScroll);
+    case WM_CONBEEP:
+        if (0) Beep(440, 400);
+        return 0;
+    case WM_CONTEXT:
+        ConDrawText(hwnd);
+        return 0;
+    case WM_CLOSE:
+        break;
+    case WM_DESTROY:
+        PostQuitMessage(0);
+        return 0;
+    }
+    return DefWindowProc (hwnd, iMsg, wParam, lParam);
+}
+
+static void
+LoadUserPreferences(void) 
+{
+    DWORD size;
+    DWORD res;
+    DWORD type;
+
+    /* default prefs */
+    GetObject(GetStockObject(SYSTEM_FIXED_FONT),sizeof(LOGFONT),(PSTR)&logfont);
+    fgColor = GetSysColor(COLOR_WINDOWTEXT);
+    bkgColor = GetSysColor(COLOR_WINDOW);
+    winPos.left = -1;
+    toolbarVisible = TRUE;
+
+    if (RegCreateKeyEx(HKEY_CURRENT_USER, USER_KEY, 0, 0,
+		       REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL,
+		       &key, &res) != ERROR_SUCCESS)
+        return;
+    has_key = TRUE;
+    if (res == REG_CREATED_NEW_KEY)
+	return;
+    size = sizeof(logfont);
+    res = RegQueryValueEx(key,TEXT("Font"),NULL,&type,(LPBYTE)&logfont,&size);
+    size = sizeof(fgColor);
+    res = RegQueryValueEx(key,TEXT("FgColor"),NULL,&type,(LPBYTE)&fgColor,&size);
+    size = sizeof(bkgColor);
+    res = RegQueryValueEx(key,TEXT("BkColor"),NULL,&type,(LPBYTE)&bkgColor,&size);
+    size = sizeof(winPos);
+    res = RegQueryValueEx(key,TEXT("Pos"),NULL,&type,(LPBYTE)&winPos,&size);
+    size = sizeof(toolbarVisible);
+    res = RegQueryValueEx(key,TEXT("Toolbar"),NULL,&type,(LPBYTE)&toolbarVisible,&size);
+}
+
+static void
+SaveUserPreferences(void)
+{  
+    WINDOWPLACEMENT wndPlace;
+
+    if (has_key == TRUE) {
+        RegSetValueEx(key,TEXT("Font"),0,REG_BINARY,(CONST BYTE *)&logfont,sizeof(LOGFONT));
+        RegSetValueEx(key,TEXT("FgColor"),0,REG_DWORD,(CONST BYTE *)&fgColor,sizeof(fgColor));
+        RegSetValueEx(key,TEXT("BkColor"),0,REG_DWORD,(CONST BYTE *)&bkgColor,sizeof(bkgColor));
+        RegSetValueEx(key,TEXT("Toolbar"),0,REG_DWORD,(CONST BYTE *)&toolbarVisible,sizeof(toolbarVisible));
+
+	wndPlace.length = sizeof(WINDOWPLACEMENT);
+	GetWindowPlacement(hFrameWnd,&wndPlace);
+	/* If wndPlace.showCmd == SW_MINIMIZE, then the window is minimized.
+	   We don't care, wndPlace.rcNormalPosition always holds the last known position. */
+	winPos = wndPlace.rcNormalPosition;
+	RegSetValueEx(key,TEXT("Pos"),0,REG_BINARY,(CONST BYTE *)&winPos,sizeof(winPos));
+    }
+}
+
+
+static void
+set_scroll_info(HWND hwnd)
+{
+    SCROLLINFO info;
+    int hScrollBy;
+    /*
+     * Set vertical scrolling range and scroll box position.
+     */
+
+    iVscrollMax = nBufLines-1;
+    iVscrollPos = min(iVscrollPos, iVscrollMax);
+    info.cbSize = sizeof(info); 
+    info.fMask = SIF_PAGE|SIF_RANGE|SIF_POS;
+    info.nMin = 0;
+    info.nPos = iVscrollPos; 
+    info.nPage = min(cyClient/cyChar, iVscrollMax);
+    info.nMax = iVscrollMax;
+    SetScrollInfo(hwnd, SB_VERT, &info, TRUE);
+
+    /*
+     * Set horizontal scrolling range and scroll box position.
+     */ 
+
+    iHscrollMax = LINE_LENGTH-1;
+    hScrollBy = max(0, (iHscrollPos - (iHscrollMax-cxClient/cxChar))*cxChar);
+    iHscrollPos = min(iHscrollPos, iHscrollMax);
+    info.nPos = iHscrollPos; 
+    info.nPage = cxClient/cxChar;
+    info.nMax = iHscrollMax;
+    SetScrollInfo(hwnd, SB_HORZ, &info, TRUE);
+    /*ScrollWindow(hwnd, hScrollBy, 0, NULL, NULL);*/
+}
+
+
+static void
+ensure_line_below(void)
+{
+    if (cur_line->next == NULL) {
+	if (nBufLines >= lines_to_save) {
+	    ScreenLine_t* pLine = buffer_top->next;
+	    FREE(buffer_top->text);
+	    FREE(buffer_top);
+	    buffer_top = pLine;
+	    buffer_top->prev = NULL;
+	    nBufLines--;
+	}
+	cur_line->next = ConNewLine();
+	cur_line->next->prev = cur_line;
+	buffer_bottom = cur_line->next;
+	set_scroll_info(hClientWnd);
+    }
+}
+
+static ScreenLine_t*
+ConNewLine(void)
+{
+    ScreenLine_t *pLine;
+
+    pLine = (ScreenLine_t *)ALLOC(sizeof(ScreenLine_t));
+    if (!pLine)
+	return NULL;
+    pLine->text = (TCHAR *) ALLOC(canvasColumns * sizeof(TCHAR));
+#ifdef HARDDEBUG
+    pLine->allocated = canvasColumns;
+#endif
+    pLine->width = 0;
+    pLine->prev = pLine->next = NULL;
+    pLine->newline = 0;
+    nBufLines++;
+    return pLine;
+}
+
+static ScreenLine_t*
+GetLineFromY(int y)
+{
+    ScreenLine_t *pLine = buffer_top;
+    int i;
+
+    for (i = 0; i < nBufLines && pLine != NULL; i++) {
+        if (i == y)
+	    return pLine;
+        pLine  = pLine->next;        
+    }
+    return NULL;
+}    
+
+void ConCarriageFeed(int hard_newline)
+{
+    cur_x = 0;
+    ensure_line_below();
+    cur_line->newline = hard_newline;
+    cur_line = cur_line->next;
+    if (cur_y < nBufLines-1) {
+	cur_y++;
+    } else if (iVscrollPos > 0) {
+	iVscrollPos--;
+    }
+}
+
+/*
+ * Scroll screen if cursor is not visible.
+ */
+static void
+ConScrollScreen(void)
+{
+    if (cur_y >= iVscrollPos + cyClient/cyChar) {
+	int iVscroll;
+
+	iVscroll = cur_y - iVscrollPos - cyClient/cyChar + 1;
+	iVscrollPos += iVscroll;
+	ScrollWindowEx(hClientWnd, 0, -cyChar*iVscroll, NULL, NULL,
+		     NULL, NULL, SW_ERASE | SW_INVALIDATE);
+	SetScrollPos(hClientWnd, SB_VERT, iVscrollPos, TRUE);
+	UpdateWindow(hClientWnd);
+    }
+}
+
+static void
+DrawSelection(HWND hwnd, POINT pt1, POINT pt2)
+{
+    HDC hdc;
+    int width,height;
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"pt1.x = %d, pt1.y = %d, pt2.x = %d, pt2.y = %d\n",
+	    (int) pt1.x, (int) pt1.y, (int) pt2.x, (int) pt2.y);
+#endif
+    pt1.x = GetXFromLine(GetDC(hwnd),iHscrollPos,pt1.x,GetLineFromY(pt1.y));
+    pt2.x = GetXFromLine(GetDC(hwnd),iHscrollPos,pt2.x,GetLineFromY(pt2.y-1));
+    pt1.y -= iVscrollPos;
+    pt2.y -= iVscrollPos;
+    pt1.y *= cyChar;
+    pt2.y *= cyChar;
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"pt1.x = %d, pt1.y = %d, pt2.x = %d, pt2.y = %d\n",
+	    (int) pt1.x, (int) pt1.y, (int) pt2.x, (int) pt2.y);
+    fflush(stderr);
+#endif
+    width = pt2.x-pt1.x;
+    height = pt2.y - pt1.y;
+    hdc = GetDC(hwnd);
+    PatBlt(hdc,pt1.x,pt1.y,width,height,DSTINVERT);
+    ReleaseDC(hwnd,hdc);
+}
+
+static void
+OnEditCopy(HWND hwnd)
+{
+    HGLOBAL hMem;
+    TCHAR *pMem;
+    ScreenLine_t *pLine;
+    RECT rects[3];
+    POINT from,to;
+    int i,j,sum,len;
+    if (editBeg.y >=  editEnd.y || 
+	(editBeg.y == editEnd.y - 1 && editBeg.x > editEnd.x)) {
+#ifdef HARD_SEL_DEBUG
+	fprintf(stderr,"CopyReverting (Beg.x = %d, Beg.y = %d, " 
+		"End.x = %d, End.y = %d)\n",editBeg.x,editBeg.y,
+		editEnd.x,editEnd.y);
+	fflush(stderr);
+#endif
+	from.x = editEnd.x;
+	from.y = editEnd.y - 1;
+	to.x = editBeg.x;
+	to.y = editBeg.y + 1; 
+	calc_sel_area(rects,from,to);
+    } else {
+	calc_sel_area(rects,editBeg,editEnd);
+    }
+    sum = 1;
+    for (i = 0; i < 3; ++i) {
+	if (!EMPTY_RECT(rects[i])) {
+	    pLine = GetLineFromY(rects[i].top);
+	    for (j = rects[i].top; j < rects[i].bottom ;++j) {
+		if (pLine == NULL) {
+		    sum += 2;
+		    break;
+		}
+		if (pLine->width > rects[i].left) {
+		    sum += (pLine->width < rects[i].right) ?
+			pLine->width -  rects[i].left : 
+			rects[i].right - rects[i].left;
+		}
+		if(pLine->newline && rects[i].right >= pLine->width) {
+		    sum += 2;
+		}
+		pLine = pLine->next;
+	    }
+	}
+    }
+#ifdef HARD_SEL_DEBUG
+    fprintf(stderr,"sum = %d\n",sum);
+    fflush(stderr);
+#endif
+    hMem = GlobalAlloc(GHND, sum * sizeof(TCHAR));
+    pMem = GlobalLock(hMem);
+    for (i = 0; i < 3; ++i) {
+	if (!EMPTY_RECT(rects[i])) {
+	    pLine = GetLineFromY(rects[i].top);
+	    for (j = rects[i].top; j < rects[i].bottom; ++j) {
+		if (pLine == NULL) {
+		    memcpy(pMem,TEXT("\r\n"),2 * sizeof(TCHAR));
+		    pMem += 2;
+		    break;
+		}
+		if (pLine->width > rects[i].left) {
+		    len = (pLine->width < rects[i].right) ?
+			pLine->width -  rects[i].left : 
+			rects[i].right - rects[i].left;
+		    memcpy(pMem,pLine->text + rects[i].left,len * sizeof(TCHAR));
+		    pMem +=len;
+		}
+		if(pLine->newline && rects[i].right >= pLine->width) {
+		    memcpy(pMem,TEXT("\r\n"),2 * sizeof(TCHAR));
+		    pMem += 2;
+		}
+		pLine = pLine->next;
+	    }
+	}
+    }
+    *pMem = TEXT('\0');
+    /* Flash de selection area to give user feedback about copying */
+    InvertSelectionArea(hwnd);
+    Sleep(100);
+    InvertSelectionArea(hwnd);
+
+    OpenClipboard(hwnd);
+    EmptyClipboard();
+    GlobalUnlock(hMem);
+    SetClipboardData(CF_UNICODETEXT,hMem);
+    CloseClipboard();
+}
+
+/* XXX:PaN Tchar or char? */
+static void
+OnEditPaste(HWND hwnd)
+{
+    HANDLE hClipMem;
+    TCHAR *pClipMem,*pMem,*pMem2;
+    if (!OpenClipboard(hwnd))
+	return;
+    if ((hClipMem = GetClipboardData(CF_UNICODETEXT)) != NULL) {
+        pClipMem = GlobalLock(hClipMem);
+        pMem = (TCHAR *)ALLOC(GlobalSize(hClipMem) * sizeof(TCHAR));
+        pMem2 = pMem;
+        while ((*pMem2 = *pClipMem) != TEXT('\0')) {
+            if (*pClipMem == TEXT('\r'))
+                *pMem2 = TEXT('\n');
+            ++pMem2;
+	    ++pClipMem;
+        }
+        GlobalUnlock(hClipMem);
+        write_inbuf(pMem, _tcsclen(pMem));
+    }
+    CloseClipboard();
+}
+
+static void
+OnEditSelAll(HWND hwnd)
+{
+    editBeg.x = 0;
+    editBeg.y = 0;
+    editEnd.x = LINE_LENGTH-1;
+    editEnd.y = cur_y;
+    fTextSelected = TRUE;
+    InvalidateRect(hwnd, NULL, TRUE);
+}
+
+UINT APIENTRY CFHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
+{
+    /* Hook procedure for font dialog box */
+    HWND hOwner;
+    RECT rc,rcOwner,rcDlg;
+    switch (iMsg) {
+    case WM_INITDIALOG:
+        /* center dialogbox within its owner window */
+        if ((hOwner = GetParent(hDlg)) == NULL) 
+            hOwner = GetDesktopWindow(); 
+        GetWindowRect(hOwner, &rcOwner); 
+        GetWindowRect(hDlg, &rcDlg); 
+        CopyRect(&rc, &rcOwner); 
+        OffsetRect(&rcDlg, -rcDlg.left, -rcDlg.top); 
+        OffsetRect(&rc, -rc.left, -rc.top); 
+        OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
+        SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
+		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
+        return 1;
+    default:
+        break;
+    }
+    return 0;			/* Let the default procedure process the message */
+}
+
+static BOOL
+ConChooseFont(HWND hwnd)
+{
+    HDC hdc;
+    hdc = GetDC(hwnd);
+    cf.lStructSize = sizeof(CHOOSEFONT);
+    cf.hwndOwner = hwnd;
+    cf.hDC = NULL;
+    cf.lpLogFont = &logfont;
+    cf.iPointSize = 0;
+    cf.Flags = CF_INITTOLOGFONTSTRUCT|CF_SCREENFONTS|CF_FIXEDPITCHONLY|CF_EFFECTS|CF_ENABLEHOOK;
+    cf.rgbColors = GetTextColor(hdc);
+    cf.lCustData = 0L;
+    cf.lpfnHook = CFHookProc;
+    cf.lpTemplateName = NULL;
+    cf.hInstance = NULL;
+    cf.lpszStyle = NULL;
+    cf.nFontType = 0;
+    cf.nSizeMin = 0;
+    cf.nSizeMax = 0;
+    ReleaseDC(hwnd,hdc);
+    return ChooseFont(&cf);
+}
+
+static void
+ConFontInitialize(HWND hwnd)
+{
+    HDC hdc;
+    TEXTMETRIC tm;
+    HFONT hFont;
+
+    hFont = CreateFontIndirect(&logfont);
+    hdc = GetDC(hwnd);
+    SelectObject(hdc, hFont); 
+    SetTextColor(hdc,fgColor);
+    SetBkColor(hdc,bkgColor);
+    GetTextMetrics(hdc, &tm);
+    cxChar = tm.tmAveCharWidth;
+    cxCharMax = tm.tmMaxCharWidth;
+    cyChar = tm.tmHeight + tm.tmExternalLeading;
+    ReleaseDC(hwnd, hdc);
+}
+
+static void
+ConSetFont(HWND hwnd)
+{
+    HDC hdc;
+    TEXTMETRIC tm;
+    HFONT hFontNew;
+	
+    hFontNew = CreateFontIndirect(&logfont); 
+    SendMessage(hComboWnd,WM_SETFONT,(WPARAM)hFontNew,
+		MAKELPARAM(1,0));
+    hdc = GetDC(hwnd);
+    DeleteObject(SelectObject(hdc, hFontNew));
+    GetTextMetrics(hdc, &tm);
+    cxChar = tm.tmAveCharWidth;
+    cxCharMax = tm.tmMaxCharWidth;
+    cyChar = tm.tmHeight + tm.tmExternalLeading;
+    fgColor = cf.rgbColors;
+    SetTextColor(hdc,fgColor);
+    ReleaseDC(hwnd, hdc);
+    set_scroll_info(hwnd);
+    HideCaret(hwnd);
+    if (DestroyCaret()) {
+        CreateCaret(hwnd, NULL, cxChar, cyChar);
+        SetCaretPos(GetXFromCurrentY(hdc,iHscrollPos,cur_x), (cur_y-iVscrollPos)*cyChar); 
+    }
+    ShowCaret(hwnd);
+    InvalidateRect(hwnd, NULL, TRUE);
+}
+
+UINT APIENTRY
+CCHookProc(HWND hDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
+{
+    /* Hook procedure for choose color dialog box */
+    HWND hOwner;
+    RECT rc,rcOwner,rcDlg;
+    switch (iMsg) {
+    case WM_INITDIALOG:
+        /* center dialogbox within its owner window */
+        if ((hOwner = GetParent(hDlg)) == NULL) 
+            hOwner = GetDesktopWindow(); 
+        GetWindowRect(hOwner, &rcOwner); 
+        GetWindowRect(hDlg, &rcDlg); 
+        CopyRect(&rc, &rcOwner); 
+        OffsetRect(&rcDlg, -rcDlg.left, -rcDlg.top); 
+        OffsetRect(&rc, -rc.left, -rc.top); 
+        OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
+        SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
+		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
+        return 1;
+    default:
+        break;
+    }
+    return 0;			/* Let the default procedure process the message */
+}
+
+void ConChooseColor(HWND hwnd)
+{
+    CHOOSECOLOR cc;                 
+    static COLORREF acrCustClr[16];                      
+    HBRUSH hbrush;
+    HDC hdc;
+
+    /* Initialize CHOOSECOLOR */
+    ZeroMemory(&cc, sizeof(CHOOSECOLOR));
+    cc.lStructSize = sizeof(CHOOSECOLOR);
+    cc.hwndOwner = hwnd;
+    cc.lpCustColors = (LPDWORD) acrCustClr;
+    cc.rgbResult = bkgColor;
+    cc.lpfnHook = CCHookProc;
+    cc.Flags = CC_FULLOPEN|CC_RGBINIT|CC_SOLIDCOLOR|CC_ENABLEHOOK;
+ 
+    if (ChooseColor(&cc)==TRUE) {
+        bkgColor = cc.rgbResult;
+        hdc = GetDC(hwnd);
+        SetBkColor(hdc,bkgColor);
+        ReleaseDC(hwnd,hdc);
+        hbrush = CreateSolidBrush(bkgColor);
+        DeleteObject((HBRUSH)SetClassLong(hClientWnd,GCL_HBRBACKGROUND,(LONG)hbrush));
+        InvalidateRect(hwnd,NULL,TRUE);		
+    }    
+}
+
+UINT APIENTRY OFNHookProc(HWND hwndDlg,UINT iMsg,WPARAM wParam,LPARAM lParam)
+{
+    /* Hook procedure for open file dialog box */
+    HWND hOwner,hDlg;
+    RECT rc,rcOwner,rcDlg;
+    hDlg = GetParent(hwndDlg);
+    switch (iMsg) {
+    case WM_INITDIALOG:
+        /* center dialogbox within its owner window */
+        if ((hOwner = GetParent(hDlg)) == NULL) 
+            hOwner = GetDesktopWindow(); 
+        GetWindowRect(hOwner, &rcOwner); 
+        GetWindowRect(hDlg, &rcDlg); 
+        CopyRect(&rc, &rcOwner); 
+        OffsetRect(&rcDlg, -rcDlg.left, -rcDlg.top); 
+        OffsetRect(&rc, -rc.left, -rc.top); 
+        OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
+        SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
+		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
+        return 1;
+    default:
+        break;
+    }
+    return 0;			/* the let default procedure process the message */
+}
+
+static void
+GetFileName(HWND hwnd, TCHAR *pFile)
+{
+    /* Open the File Open dialog box and */
+    /* retrieve the file name            */
+    OPENFILENAME ofn;
+    TCHAR szFilterSpec [128] = TEXT("logfiles (*.log)\0*.log\0All files (*.*)\0*.*\0\0");
+    #define MAXFILENAME 256
+    TCHAR szFileName[MAXFILENAME];
+    TCHAR szFileTitle[MAXFILENAME];
+
+    /* these need to be filled in */
+    _tcscpy(szFileName, TEXT("erlshell.log"));   
+    _tcscpy(szFileTitle, TEXT("")); /* must be NULL */
+
+    ofn.lStructSize       = sizeof(OPENFILENAME);
+    ofn.hwndOwner         = NULL;
+    ofn.lpstrFilter       = szFilterSpec;
+    ofn.lpstrCustomFilter = NULL;
+    ofn.nMaxCustFilter    = 0;
+    ofn.nFilterIndex      = 0;
+    ofn.lpstrFile         = szFileName;
+    ofn.nMaxFile          = MAXFILENAME;
+    ofn.lpstrInitialDir   = NULL;
+    ofn.lpstrFileTitle    = szFileTitle;
+    ofn.nMaxFileTitle     = MAXFILENAME;
+    ofn.lpstrTitle        = TEXT("Open logfile");
+    ofn.lpstrDefExt       = TEXT("log");
+    ofn.Flags             = OFN_CREATEPROMPT|OFN_HIDEREADONLY|OFN_EXPLORER|OFN_ENABLEHOOK|OFN_NOCHANGEDIR; /* OFN_NOCHANGEDIR only works in Vista :( */
+    ofn.lpfnHook          = OFNHookProc;
+   
+    if (!GetOpenFileName ((LPOPENFILENAME)&ofn)){
+        *pFile = TEXT('\0');
+    } else {
+        _tcscpy(pFile, ofn.lpstrFile);
+    }
+}
+
+void OpenLogFile(HWND hwnd)
+{
+    /* open a file for logging */
+    TCHAR filename[_MAX_PATH];
+
+    GetFileName(hwnd, filename);
+    if (filename[0] == '\0')
+        return;
+    if (NULL == (logfile = _tfopen(filename,TEXT("w,ccs=UNICODE"))))
+        return;
+}
+
+void CloseLogFile(HWND hwnd)
+{
+    /* close log file */
+    fclose(logfile);
+    logfile = NULL;
+}
+
+void LogFileWrite(TCHAR *buf, int num_chars)
+{
+    /* write to logfile */
+    int from,to;
+    while (num_chars-- > 0) {     
+        switch (*buf) {
+        case SET_CURSOR:
+            buf++;
+            from = *((int *)buf);
+            buf += sizeof(int)/sizeof(TCHAR);
+            to = *((int *)buf);
+            buf += (sizeof(int)/sizeof(TCHAR))-1;
+            num_chars -= 2 * (sizeof(int)/sizeof(TCHAR));
+	    // Wont seek in Unicode file, sorry...
+            // fseek(logfile,to-from *sizeof(TCHAR),SEEK_CUR);
+            break;
+        default:
+            _fputtc(*buf,logfile);
+            break;
+        }
+        buf++;
+    }
+}
+
+static void
+init_buffers(void)
+{
+    inbuf.data = (TCHAR *) ALLOC(BUFSIZE * sizeof(TCHAR));
+    outbuf.data = (TCHAR *) ALLOC(BUFSIZE * sizeof(TCHAR));
+    inbuf.size = BUFSIZE;
+    inbuf.rdPos = inbuf.wrPos = 0;
+    outbuf.size = BUFSIZE;
+    outbuf.rdPos = outbuf.wrPos = 0;
+}
+
+static int
+check_realloc(buffer_t *buf, int num_chars)
+{
+    if (buf->wrPos + num_chars >= buf->size) {
+	if (buf->size > MAXBUFSIZE)
+	    return 0;
+	buf->size += num_chars + BUFSIZE;
+	if (!(buf->data = (TCHAR *)REALLOC(buf->data, buf->size * sizeof(TCHAR)))) {
+	    buf->size = buf->rdPos = buf->wrPos = 0;
+	    return 0;
+        }
+    }
+    return 1;
+}
+
+static int
+write_inbuf(TCHAR *data, int num_chars)
+{
+    TCHAR *buf;
+    int nwrite;
+    WaitForSingleObject(console_input,INFINITE);
+    if (!check_realloc(&inbuf,num_chars)) {
+        ReleaseSemaphore(console_input,1,NULL);
+        return -1;
+    }
+    buf = &inbuf.data[inbuf.wrPos];
+    inbuf.wrPos += num_chars; 
+    nwrite = num_chars;
+    while (nwrite--) 
+        *buf++ = *data++;
+    SetEvent(console_input_event);
+    ReleaseSemaphore(console_input,1,NULL);
+    return num_chars;
+}
+
+static int 
+write_outbuf(TCHAR *data, int num_chars)
+{
+    TCHAR *buf;
+    int nwrite;
+
+    WaitForSingleObject(console_output,INFINITE);
+    if (!check_realloc(&outbuf, num_chars)) {
+        ReleaseSemaphore(console_output,1,NULL);
+        return -1;
+    }
+    if (outbuf.rdPos == outbuf.wrPos)
+        PostMessage(hClientWnd, WM_CONTEXT, 0L, 0L);
+    buf = &outbuf.data[outbuf.wrPos];
+    outbuf.wrPos += num_chars; 
+    nwrite = num_chars;
+    while (nwrite--) 
+        *buf++ = *data++;
+    ReleaseSemaphore(console_output,1,NULL);
+    return num_chars;
+}
+
+BOOL CALLBACK AboutDlgProc(HWND hDlg, UINT iMsg, WPARAM wParam, LPARAM lParam)
+{
+    HWND hOwner;
+    RECT rc,rcOwner,rcDlg;
+
+    switch (iMsg) {
+    case WM_INITDIALOG:
+        /* center dialogbox within its owner window */
+        if ((hOwner = GetParent(hDlg)) == NULL) 
+            hOwner = GetDesktopWindow(); 
+        GetWindowRect(hOwner, &rcOwner); 
+        GetWindowRect(hDlg, &rcDlg); 
+        CopyRect(&rc, &rcOwner); 
+        OffsetRect(&rcDlg, -rcDlg.left, -rcDlg.top); 
+        OffsetRect(&rc, -rc.left, -rc.top); 
+        OffsetRect(&rc, -rcDlg.right, -rcDlg.bottom); 
+        SetWindowPos(hDlg,HWND_TOP,rcOwner.left + (rc.right / 2), 
+		     rcOwner.top + (rc.bottom / 2),0,0,SWP_NOSIZE); 
+        SetDlgItemText(hDlg, ID_VERSIONSTRING,
+		       TEXT("Erlang emulator version ") TEXT(ERLANG_VERSION)); 
+        return TRUE;
+    case WM_COMMAND:
+        switch (LOWORD(wParam)) {
+        case IDOK:
+        case IDCANCEL:
+            EndDialog(hDlg,0);
+            return TRUE;
+        }
+        break;
+    }
+    return FALSE;
+}
+
+static void
+ConDrawText(HWND hwnd)
+{
+    int num_chars;
+    int nchars;
+    TCHAR *buf;
+    int from, to;
+    int dl;
+    int dc;
+    RECT rc;
+
+    WaitForSingleObject(console_output, INFINITE);
+    nchars = 0;
+    num_chars = outbuf.wrPos - outbuf.rdPos;
+    buf = &outbuf.data[outbuf.rdPos];
+    if (logfile != NULL)
+	LogFileWrite(buf, num_chars);
+
+
+#ifdef HARDDEBUG
+    {
+	TCHAR *bu = (TCHAR *) ALLOC((num_chars+1) * sizeof(TCHAR));
+	memcpy(bu,buf,num_chars * sizeof(TCHAR));
+	bu[num_chars]='\0';
+	fprintf(stderr,TEXT("ConDrawText\"%s\"\n"),bu);
+	FREE(bu);
+	fflush(stderr);
+    }
+#endif
+    /*
+     * Don't draw any text in the window; just update the line buffers
+     * and invalidate the appropriate part of the window.  The window
+     * will be updated on the next WM_PAINT message.
+     */
+
+    while (num_chars-- > 0) {     
+        switch (*buf) {
+        case '\r':
+            break;
+        case '\n':
+            if (nchars > 0) {
+		rc.left = GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x - nchars);
+		rc.right = rc.left + cxCharMax*nchars;
+		rc.top = cyChar * (cur_y-iVscrollPos);
+		rc.bottom = rc.top + cyChar;
+		InvalidateRect(hwnd, &rc, TRUE);
+                nchars = 0;
+	    }
+	    ConCarriageFeed(1);
+            ConScrollScreen();
+            break;
+        case SET_CURSOR:
+            if (nchars > 0) { 
+		rc.left = GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x - nchars);
+		rc.right = rc.left + cxCharMax*nchars;
+		rc.top = cyChar * (cur_y-iVscrollPos);
+		rc.bottom = rc.top + cyChar;
+		InvalidateRect(hwnd, &rc, TRUE);
+                nchars = 0;
+            }
+            buf++;
+            from = *((int *)buf);
+            buf += sizeof(int)/sizeof(TCHAR);
+            to = *((int *)buf);
+            buf += (sizeof(int)/sizeof(TCHAR))-1;
+            num_chars -= 2 * (sizeof(int)/sizeof(TCHAR));
+	    while (to > from) {
+		cur_x++;
+		if (GetXFromCurrentY(GetDC(hwnd),0,cur_x)+cxChar > 
+		    (LINE_LENGTH * cxChar)) {
+		    cur_x = 0;
+		    cur_y++;
+		    ensure_line_below();
+		    cur_line = cur_line->next;
+		}
+		from++;
+	    }
+	    while (to < from) {
+		cur_x--;
+		if (cur_x < 0) {
+		    cur_y--;
+		    cur_line = cur_line->prev;
+		    cur_x = cur_line->width-1;
+		}
+		from--;
+	    }
+		
+            break;
+        default:
+            nchars++;
+	    cur_line->text[cur_x] = *buf;
+	    cur_x++;
+            if (cur_x > cur_line->width)
+		cur_line->width = cur_x; 
+	    if (GetXFromCurrentY(GetDC(hwnd),0,cur_x)+cxChar > 
+		(LINE_LENGTH * cxChar)) {
+                if (nchars > 0) { 
+		    rc.left = GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x - nchars);
+                    rc.right = rc.left + cxCharMax*nchars;
+                    rc.top = cyChar * (cur_y-iVscrollPos);
+                    rc.bottom = rc.top + cyChar;
+		    InvalidateRect(hwnd, &rc, TRUE);
+                }
+                ConCarriageFeed(0);
+                nchars = 0;
+            }
+        }
+        buf++;
+    }
+    if (nchars > 0) {
+	rc.left = GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x - nchars);
+	rc.right = rc.left + cxCharMax*nchars;
+	rc.top = cyChar * (cur_y-iVscrollPos);
+	rc.bottom = rc.top + cyChar;
+	InvalidateRect(hwnd, &rc, TRUE);
+    }
+    ConScrollScreen();
+    SetCaretPos(GetXFromCurrentY(GetDC(hwnd),iHscrollPos,cur_x), (cur_y-iVscrollPos)*cyChar);
+    outbuf.wrPos = outbuf.rdPos = 0;
+    ReleaseSemaphore(console_output, 1, NULL);
+}
+
+static void
+AddToCmdHistory(void)
+{
+    int i;
+    int size;
+    Uint32 *buf;
+    wchar_t cmdBuf[128];
+
+    if (llen != 0) {
+	for (i = 0, size = 0; i < llen-1; i++) {
+	    /*
+	     * Find end of prompt.
+	     */
+	    if ((lbuf[i] == '>') && lbuf[i+1] == ' ') {
+		buf = &lbuf[i+2];
+		size = llen-i-2;
+		break;
+	    }
+	}
+	if (size > 0 && size < 128) {
+	    for (i = 0;i < size; ++i) {
+		cmdBuf[i] = (wchar_t) buf[i];
+	    }
+	    cmdBuf[size] = 0;
+	    SendMessage(hComboWnd,CB_INSERTSTRING,0,(LPARAM)cmdBuf);
+	}
+    }
+}
+
+static TBBUTTON tbb[] =
+{
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+    0,          IDMENU_COPY,	TBSTATE_ENABLED, TBSTYLE_AUTOSIZE, 0, 0, 0, 0,
+    1,	        IDMENU_PASTE,	TBSTATE_ENABLED, TBSTYLE_AUTOSIZE, 0, 0, 0, 0,
+    2,	        IDMENU_FONT,	TBSTATE_ENABLED, TBSTYLE_AUTOSIZE, 0, 0, 0, 0,
+    3,	        IDMENU_ABOUT,	TBSTATE_ENABLED, TBSTYLE_AUTOSIZE, 0, 0, 0, 0,
+    0,          0,              TBSTATE_ENABLED, TBSTYLE_SEP,    0, 0, 0, 0,
+};
+
+static TBADDBITMAP tbbitmap =
+{
+    HINST_COMMCTRL, IDB_STD_SMALL_COLOR,
+};
+
+
+static HWND
+InitToolBar(HWND hwndParent) 
+{ 
+    int x,y,cx;
+    HWND hwndTB,hwndTT; 
+    RECT r;
+    TOOLINFO ti;
+    HFONT hFontNew;
+    DWORD backgroundColor = GetSysColor(COLOR_BTNFACE);
+    COLORMAP colorMap;
+    colorMap.from = RGB(192, 192, 192);
+    colorMap.to = backgroundColor;
+
+    /* Create toolbar window with tooltips */
+    hwndTB = CreateWindowEx(0,TOOLBARCLASSNAME,(TCHAR *)NULL,
+			    WS_CHILD|CCS_TOP|WS_CLIPSIBLINGS|TBSTYLE_TOOLTIPS,
+			    0,0,0,0,hwndParent,
+			    (HMENU)2,hInstance,NULL); 
+    SendMessage(hwndTB,TB_BUTTONSTRUCTSIZE,
+		(WPARAM) sizeof(TBBUTTON),0); 
+    tbbitmap.hInst = NULL;
+    tbbitmap.nID   = (UINT) CreateMappedBitmap(beam_module, 1,0, &colorMap, 1);
+    SendMessage(hwndTB, TB_ADDBITMAP, (WPARAM) 4, 
+		(WPARAM) &tbbitmap); 
+    SendMessage(hwndTB,TB_ADDBUTTONS, (WPARAM) 30,
+		(LPARAM) (LPTBBUTTON) tbb); 
+    if (toolbarVisible)
+	ShowWindow(hwndTB, SW_SHOW); 
+
+    /* Create combobox window */
+    SendMessage(hwndTB,TB_GETITEMRECT,0,(LPARAM)&r);
+    x = r.left; y = r.top;
+    SendMessage(hwndTB,TB_GETITEMRECT,23,(LPARAM)&r);
+    cx = r.right - x + 1;
+    hComboWnd = CreateWindow(TEXT("combobox"),NULL,WS_VSCROLL|WS_CHILD|WS_VISIBLE|CBS_DROPDOWNLIST,
+			     x,y,cx,100,hwndParent,(HMENU)ID_COMBOBOX, hInstance,NULL);
+    SetParent(hComboWnd,hwndTB);
+    hFontNew = CreateFontIndirect(&logfont); 
+    SendMessage(hComboWnd,WM_SETFONT,(WPARAM)hFontNew,
+		MAKELPARAM(1,0));
+
+    /* Add tooltip for combo box */
+    ZeroMemory(&ti,sizeof(TOOLINFO));
+    ti.cbSize = sizeof(TOOLINFO);
+    ti.uFlags = TTF_IDISHWND|TTF_CENTERTIP|TTF_SUBCLASS;
+    ti.hwnd = hwndTB;;
+    ti.uId = (UINT)hComboWnd;
+    ti.lpszText = LPSTR_TEXTCALLBACK;
+    hwndTT = (HWND)SendMessage(hwndTB,TB_GETTOOLTIPS,0,0);
+    SendMessage(hwndTT,TTM_ADDTOOL,0,(LPARAM)&ti);
+
+    return hwndTB; 
+} 
+
+static void
+window_title(struct title_buf *tbuf)
+{
+    int res, i;
+    size_t bufsz = TITLE_BUF_SZ;
+    unsigned char charbuff[TITLE_BUF_SZ];
+
+    res = erl_drv_getenv("ERL_WINDOW_TITLE", charbuff, &bufsz);
+    if (res < 0)
+	tbuf->name = erlang_window_title;
+    else if (res == 0) { 
+	for (i = 0; i < bufsz; ++i) {
+	    tbuf->buf[i] = charbuff[i];
+	}
+        tbuf->buf[bufsz - 1] = 0;
+	tbuf->name = &tbuf->buf[0];
+    } else {
+	char *buf = ALLOC(bufsz);
+	if (!buf)
+	    tbuf->name = erlang_window_title;
+	else {
+	    while (1) {
+		char *newbuf;
+		res = erl_drv_getenv("ERL_WINDOW_TITLE", buf, &bufsz);
+		if (res <= 0) {
+		    if (res == 0) {
+			TCHAR *wbuf = ALLOC(bufsz *sizeof(TCHAR));
+			for (i = 0; i < bufsz ; ++i) {
+			    wbuf[i] = buf[i];
+			}
+			wbuf[bufsz - 1] = 0;
+			FREE(buf);
+			tbuf->name = wbuf;
+		    } else {
+			tbuf->name = erlang_window_title;
+			FREE(buf);
+		    }
+		    break;
+		}
+		newbuf = REALLOC(buf, bufsz);
+		if (newbuf)
+		    buf = newbuf;
+		else {
+		    tbuf->name = erlang_window_title;
+		    FREE(buf);
+		    break;
+		}
+	    }
+	}
+    }
+}
+
+static void
+free_window_title(struct title_buf *tbuf)
+{
+    if (tbuf->name != erlang_window_title && tbuf->name != &tbuf->buf[0])
+	FREE(tbuf->name);
+}