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edit.c

/*
 *    Edit control
 *
 *    Copyright  David W. Metcalfe, 1994
 *    Copyright  William Magro, 1995, 1996
 *    Copyright  Frans van Dorsselaer, 1996, 1997
 *
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 *
 * NOTES
 *
 * This code was audited for completeness against the documented features
 * of Comctl32.dll version 6.0 on Oct. 8, 2004, by Dimitrie O. Paun.
 * 
 * Unless otherwise noted, we believe this code to be complete, as per
 * the specification mentioned above.
 * If you discover missing features, or bugs, please note them below.
 *
 * TODO:
 *   - EDITBALLOONTIP structure
 *   - EM_GETCUEBANNER/Edit_GetCueBannerText
 *   - EM_HIDEBALLOONTIP/Edit_HideBalloonTip
 *   - EM_SETCUEBANNER/Edit_SetCueBannerText
 *   - EM_SHOWBALLOONTIP/Edit_ShowBalloonTip
 *   - EM_GETIMESTATUS, EM_SETIMESTATUS
 *   - EN_ALIGN_LTR_EC
 *   - EN_ALIGN_RTL_EC
 *   - ES_OEMCONVERT
 *
 */

#include "config.h"

#include <stdarg.h>
#include <string.h>
#include <stdlib.h>

#include "windef.h"
#include "winbase.h"
#include "winnt.h"
#include "wownt32.h"
#include "win.h"
#include "imm.h"
#include "wine/winbase16.h"
#include "wine/winuser16.h"
#include "wine/unicode.h"
#include "controls.h"
#include "user_private.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(edit);
WINE_DECLARE_DEBUG_CHANNEL(combo);
WINE_DECLARE_DEBUG_CHANNEL(relay);

#define BUFLIMIT_INITIAL    30000   /* initial buffer size */
#define GROWLENGTH            32    /* buffers granularity in bytes: must be power of 2 */
#define ROUND_TO_GROW(size)   (((size) + (GROWLENGTH - 1)) & ~(GROWLENGTH - 1))
#define HSCROLL_FRACTION      3     /* scroll window by 1/3 width */

/*
 *    extra flags for EDITSTATE.flags field
 */
#define EF_MODIFIED           0x0001      /* text has been modified */
#define EF_FOCUSED            0x0002      /* we have input focus */
#define EF_UPDATE       0x0004      /* notify parent of changed state */
#define EF_VSCROLL_TRACK      0x0008      /* don't SetScrollPos() since we are tracking the thumb */
#define EF_HSCROLL_TRACK      0x0010      /* don't SetScrollPos() since we are tracking the thumb */
#define EF_AFTER_WRAP         0x0080      /* the caret is displayed after the last character of a
                                 wrapped line, instead of in front of the next character */
#define EF_USE_SOFTBRK        0x0100      /* Enable soft breaks in text. */
#define EF_APP_HAS_HANDLE       0x0200  /* Set when an app sends EM_[G|S]ETHANDLE.  We are in sole control of
                                           the text buffer if this is clear. */
#define EF_DIALOGMODE           0x0400  /* Indicates that we are inside a dialog window */

typedef enum
{
      END_0 = 0,              /* line ends with terminating '\0' character */
      END_WRAP,               /* line is wrapped */
      END_HARD,               /* line ends with a hard return '\r\n' */
        END_SOFT,                   /* line ends with a soft return '\r\r\n' */
        END_RICH                    /* line ends with a single '\n' */
} LINE_END;

typedef struct tagLINEDEF {
      INT length;             /* bruto length of a line in bytes */
      INT net_length;               /* netto length of a line in visible characters */
      LINE_END ending;
      INT width;              /* width of the line in pixels */
      INT index;              /* line index into the buffer */
      struct tagLINEDEF *next;
} LINEDEF;

typedef struct
{
      BOOL is_unicode;        /* how the control was created */
      LPWSTR text;                  /* the actual contents of the control */
        UINT text_length;               /* cached length of text buffer (in WCHARs) - use get_text_length() to retrieve */
      UINT buffer_size;       /* the size of the buffer in characters */
      UINT buffer_limit;            /* the maximum size to which the buffer may grow in characters */
      HFONT font;             /* NULL means standard system font */
      INT x_offset;                 /* scroll offset  for multi lines this is in pixels
                                                for single lines it's in characters */
      INT line_height;        /* height of a screen line in pixels */
      INT char_width;               /* average character width in pixels */
      DWORD style;                  /* sane version of wnd->dwStyle */
      WORD flags;             /* flags that are not in es->style or wnd->flags (EF_XXX) */
      INT undo_insert_count;        /* number of characters inserted in sequence */
      UINT undo_position;           /* character index of the insertion and deletion */
      LPWSTR undo_text;       /* deleted text */
      UINT undo_buffer_size;        /* size of the deleted text buffer */
      INT selection_start;          /* == selection_end if no selection */
      INT selection_end;            /* == current caret position */
      WCHAR password_char;          /* == 0 if no password char, and for multi line controls */
      INT left_margin;        /* in pixels */
      INT right_margin;       /* in pixels */
      RECT format_rect;
      INT text_width;               /* width of the widest line in pixels for multi line controls
                                 and just line width for single line controls */
      INT region_posx;        /* Position of cursor relative to region: */
      INT region_posy;        /* -1: to left, 0: within, 1: to right */
      EDITWORDBREAKPROC16 word_break_proc16;
      void *word_break_proc;        /* 32-bit word break proc: ANSI or Unicode */
      INT line_count;               /* number of lines */
      INT y_offset;                 /* scroll offset in number of lines */
      BOOL bCaptureState;           /* flag indicating whether mouse was captured */
      BOOL bEnableState;            /* flag keeping the enable state */
      HWND hwndSelf;                /* the our window handle */
      HWND hwndParent;        /* Handle of parent for sending EN_* messages.
                                   Even if parent will change, EN_* messages
                                 should be sent to the first parent. */
      HWND hwndListBox;       /* handle of ComboBox's listbox or NULL */
      /*
       *    only for multi line controls
       */
      INT lock_count;               /* amount of re-entries in the EditWndProc */
      INT tabs_count;
      LPINT tabs;
      LINEDEF *first_line_def;      /* linked list of (soft) linebreaks */
      HLOCAL hloc32W;               /* our unicode local memory block */
      HLOCAL16 hloc16;        /* alias for 16-bit control receiving EM_GETHANDLE16
                                 or EM_SETHANDLE16 */
      HLOCAL hloc32A;               /* alias for ANSI control receiving EM_GETHANDLE
                                 or EM_SETHANDLE */
      /*
       * IME Data
       */
      UINT composition_len;   /* length of composition, 0 == no composition */
      int composition_start;  /* the character position for the composition */
} EDITSTATE;


#define SWAP_UINT32(x,y) do { UINT temp = (UINT)(x); (x) = (UINT)(y); (y) = temp; } while(0)
#define ORDER_UINT(x,y) do { if ((UINT)(y) < (UINT)(x)) SWAP_UINT32((x),(y)); } while(0)

/* used for disabled or read-only edit control */
#define EDIT_NOTIFY_PARENT(es, wNotifyCode) \
      do \
      { /* Notify parent which has created this edit control */ \
          TRACE("notification " #wNotifyCode " sent to hwnd=%p\n", es->hwndParent); \
          SendMessageW(es->hwndParent, WM_COMMAND, \
                 MAKEWPARAM(GetWindowLongPtrW((es->hwndSelf),GWLP_ID), wNotifyCode), \
                 (LPARAM)(es->hwndSelf)); \
      } while(0)


/*********************************************************************
 *
 *    EM_CANUNDO
 *
 */
static inline BOOL EDIT_EM_CanUndo(const EDITSTATE *es)
{
      return (es->undo_insert_count || strlenW(es->undo_text));
}


/*********************************************************************
 *
 *    EM_EMPTYUNDOBUFFER
 *
 */
static inline void EDIT_EM_EmptyUndoBuffer(EDITSTATE *es)
{
      es->undo_insert_count = 0;
      *es->undo_text = '\0';
}


/**********************************************************************
 *         get_app_version
 *
 * Returns the window version in case Wine emulates a later version
 * of windows than the application expects.
 *
 * In a number of cases when windows runs an application that was
 * designed for an earlier windows version, windows reverts
 * to "old" behaviour of that earlier version.
 *
 * An example is a disabled  edit control that needs to be painted.
 * Old style behaviour is to send a WM_CTLCOLOREDIT message. This was
 * changed in Win95, NT4.0 by a WM_CTLCOLORSTATIC message _only_ for
 * applications with an expected version 0f 4.0 or higher.
 *
 */
static DWORD get_app_version(void)
{
    static DWORD version;
    if (!version)
    {
        DWORD dwEmulatedVersion;
        OSVERSIONINFOW info;
        DWORD dwProcVersion = GetProcessVersion(0);

      info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);
        GetVersionExW( &info );
        dwEmulatedVersion = MAKELONG( info.dwMinorVersion, info.dwMajorVersion );
        /* FIXME: this may not be 100% correct; see discussion on the
         * wine developer list in Nov 1999 */
        version = dwProcVersion < dwEmulatedVersion ? dwProcVersion : dwEmulatedVersion;
    }
    return version;
}

static HBRUSH EDIT_NotifyCtlColor(EDITSTATE *es, HDC hdc)
{
        HBRUSH hbrush;
      UINT msg;

        if ( get_app_version() >= 0x40000 && (!es->bEnableState || (es->style & ES_READONLY)))
            msg = WM_CTLCOLORSTATIC;
        else
            msg = WM_CTLCOLOREDIT;

      /* why do we notify to es->hwndParent, and we send this one to GetParent()? */
        hbrush = (HBRUSH)SendMessageW(GetParent(es->hwndSelf), msg, (WPARAM)hdc, (LPARAM)es->hwndSelf);
        if (!hbrush)
            hbrush = (HBRUSH)DefWindowProcW(GetParent(es->hwndSelf), msg, (WPARAM)hdc, (LPARAM)es->hwndSelf);
        return hbrush;
}


/*********************************************************************
 *
 *    EDIT_WordBreakProc
 *
 *    Find the beginning of words.
 *    Note: unlike the specs for a WordBreakProc, this function only
 *          allows to be called without linebreaks between s[0] up to
 *          s[count - 1].  Remember it is only called
 *          internally, so we can decide this for ourselves.
 *
 */
static INT EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action)
{
      INT ret = 0;

      TRACE("s=%p, index=%d, count=%d, action=%d\n", s, index, count, action);

      if(!s) return 0;

      switch (action) {
      case WB_LEFT:
            if (!count)
                  break;
            if (index)
                  index--;
            if (s[index] == ' ') {
                  while (index && (s[index] == ' '))
                        index--;
                  if (index) {
                        while (index && (s[index] != ' '))
                              index--;
                        if (s[index] == ' ')
                              index++;
                  }
            } else {
                  while (index && (s[index] != ' '))
                        index--;
                  if (s[index] == ' ')
                        index++;
            }
            ret = index;
            break;
      case WB_RIGHT:
            if (!count)
                  break;
            if (index)
                  index--;
            if (s[index] == ' ')
                  while ((index < count) && (s[index] == ' ')) index++;
            else {
                  while (s[index] && (s[index] != ' ') && (index < count))
                        index++;
                  while ((s[index] == ' ') && (index < count)) index++;
            }
            ret = index;
            break;
      case WB_ISDELIMITER:
            ret = (s[index] == ' ');
            break;
      default:
            ERR("unknown action code, please report !\n");
            break;
      }
      return ret;
}


/*********************************************************************
 *
 *    EDIT_CallWordBreakProc
 *
 *    Call appropriate WordBreakProc (internal or external).
 *
 *    Note: The "start" argument should always be an index referring
 *          to es->text.  The actual wordbreak proc might be
 *          16 bit, so we can't always pass any 32 bit LPSTR.
 *          Hence we assume that es->text is the buffer that holds
 *          the string under examination (we can decide this for ourselves).
 *
 */
static INT EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action)
{
      INT ret;

      if (es->word_break_proc16) {
          HGLOBAL16 hglob16;
          SEGPTR segptr;
          INT countA;
            WORD args[5];
            DWORD result;

          countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
          hglob16 = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT, countA);
          segptr = WOWGlobalLock16(hglob16);
          WideCharToMultiByte(CP_ACP, 0, es->text + start, count, MapSL(segptr), countA, NULL, NULL);
            args[4] = SELECTOROF(segptr);
            args[3] = OFFSETOF(segptr);
            args[2] = index;
            args[1] = countA;
            args[0] = action;
            WOWCallback16Ex((DWORD)es->word_break_proc16, WCB16_PASCAL, sizeof(args), args, &result);
            ret = LOWORD(result);
          GlobalUnlock16(hglob16);
          GlobalFree16(hglob16);
      }
      else if (es->word_break_proc)
        {
          if(es->is_unicode)
          {
            EDITWORDBREAKPROCW wbpW = (EDITWORDBREAKPROCW)es->word_break_proc;

            TRACE_(relay)("(UNICODE wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
                  es->word_break_proc, debugstr_wn(es->text + start, count), index, count, action);
            ret = wbpW(es->text + start, index, count, action);
          }
          else
          {
            EDITWORDBREAKPROCA wbpA = (EDITWORDBREAKPROCA)es->word_break_proc;
            INT countA;
            CHAR *textA;

            countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
            textA = HeapAlloc(GetProcessHeap(), 0, countA);
            WideCharToMultiByte(CP_ACP, 0, es->text + start, count, textA, countA, NULL, NULL);
            TRACE_(relay)("(ANSI wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
                  es->word_break_proc, debugstr_an(textA, countA), index, countA, action);
            ret = wbpA(textA, index, countA, action);
            HeapFree(GetProcessHeap(), 0, textA);
          }
        }
      else
            ret = EDIT_WordBreakProc(es->text + start, index, count, action);

      return ret;
}

/*********************************************************************
 *
 *    EDIT_BuildLineDefs_ML
 *
 *    Build linked list of text lines.
 *    Lines can end with '\0' (last line), a character (if it is wrapped),
 *    a soft return '\r\r\n' or a hard return '\r\n'
 *
 */
static void EDIT_BuildLineDefs_ML(EDITSTATE *es, INT istart, INT iend, INT delta, HRGN hrgn)
{
      HDC dc;
      HFONT old_font = 0;
      LPWSTR current_position, cp;
      INT fw;
      LINEDEF *current_line;
      LINEDEF *previous_line;
      LINEDEF *start_line;
      INT line_index = 0, nstart_line = 0, nstart_index = 0;
      INT line_count = es->line_count;
      INT orig_net_length;
      RECT rc;

      if (istart == iend && delta == 0)
            return;

      dc = GetDC(es->hwndSelf);
      if (es->font)
            old_font = SelectObject(dc, es->font);

      previous_line = NULL;
      current_line = es->first_line_def;

      /* Find starting line. istart must lie inside an existing line or
       * at the end of buffer */
      do {
            if (istart < current_line->index + current_line->length ||
                        current_line->ending == END_0)
                  break;

            previous_line = current_line;
            current_line = current_line->next;
            line_index++;
      } while (current_line);

      if (!current_line) /* Error occurred start is not inside previous buffer */
      {
            FIXME(" modification occurred outside buffer\n");
            ReleaseDC(es->hwndSelf, dc);
            return;
      }

      /* Remember start of modifications in order to calculate update region */
      nstart_line = line_index;
      nstart_index = current_line->index;

      /* We must start to reformat from the previous line since the modifications
       * may have caused the line to wrap upwards. */
      if (!(es->style & ES_AUTOHSCROLL) && line_index > 0)
      {
            line_index--;
            current_line = previous_line;
      }
      start_line = current_line;

      fw = es->format_rect.right - es->format_rect.left;
      current_position = es->text + current_line->index;
      do {
            if (current_line != start_line)
            {
                  if (!current_line || current_line->index + delta > current_position - es->text)
                  {
                        /* The buffer has been expanded, create a new line and
                           insert it into the link list */
                        LINEDEF *new_line = HeapAlloc(GetProcessHeap(), 0, sizeof(LINEDEF));
                        new_line->next = previous_line->next;
                        previous_line->next = new_line;
                        current_line = new_line;
                        es->line_count++;
                  }
                  else if (current_line->index + delta < current_position - es->text)
                  {
                        /* The previous line merged with this line so we delete this extra entry */
                        previous_line->next = current_line->next;
                        HeapFree(GetProcessHeap(), 0, current_line);
                        current_line = previous_line->next;
                        es->line_count--;
                        continue;
                  }
                  else /* current_line->index + delta == current_position */
                  {
                        if (current_position - es->text > iend)
                              break; /* We reached end of line modifications */
                        /* else recalculate this line */
                  }
            }

            current_line->index = current_position - es->text;
            orig_net_length = current_line->net_length;

            /* Find end of line */
            cp = current_position;
            while (*cp) {
                    if (*cp == '\n') break;
                  if ((*cp == '\r') && (*(cp + 1) == '\n'))
                        break;
                  cp++;
            }

            /* Mark type of line termination */
            if (!(*cp)) {
                  current_line->ending = END_0;
                  current_line->net_length = strlenW(current_position);
            } else if ((cp > current_position) && (*(cp - 1) == '\r')) {
                  current_line->ending = END_SOFT;
                  current_line->net_length = cp - current_position - 1;
                } else if (*cp == '\n') {
                  current_line->ending = END_RICH;
                  current_line->net_length = cp - current_position;
            } else {
                  current_line->ending = END_HARD;
                  current_line->net_length = cp - current_position;
            }

            /* Calculate line width */
            current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
                              current_position, current_line->net_length,
                              es->tabs_count, es->tabs));

            /* FIXME: check here for lines that are too wide even in AUTOHSCROLL (> 32767 ???) */
            if (!(es->style & ES_AUTOHSCROLL)) {
               if (current_line->width > fw) {
                  INT next = 0;
                  INT prev;
                  do {
                        prev = next;
                        next = EDIT_CallWordBreakProc(es, current_position - es->text,
                                    prev + 1, current_line->net_length, WB_RIGHT);
                        current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
                                          current_position, next, es->tabs_count, es->tabs));
                  } while (current_line->width <= fw);
                  if (!prev) { /* Didn't find a line break so force a break */
                        next = 0;
                        do {
                              prev = next;
                              next++;
                              current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
                                                current_position, next, es->tabs_count, es->tabs));
                        } while (current_line->width <= fw);
                        if (!prev)
                              prev = 1;
                  }

                  /* If the first line we are calculating, wrapped before istart, we must
                   * adjust istart in order for this to be reflected in the update region. */
                  if (current_line->index == nstart_index && istart > current_line->index + prev)
                        istart = current_line->index + prev;
                  /* else if we are updating the previous line before the first line we
                   * are re-calculating and it expanded */
                  else if (current_line == start_line &&
                              current_line->index != nstart_index && orig_net_length < prev)
                  {
                    /* Line expanded due to an upwards line wrap so we must partially include
                     * previous line in update region */
                        nstart_line = line_index;
                        nstart_index = current_line->index;
                        istart = current_line->index + orig_net_length;
                  }

                  current_line->net_length = prev;
                  current_line->ending = END_WRAP;
                  current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc, current_position,
                              current_line->net_length, es->tabs_count, es->tabs));
                }
                else if (current_line == start_line &&
                             current_line->index != nstart_index &&
                             orig_net_length < current_line->net_length) {
                  /* The previous line expanded but it's still not as wide as the client rect */
                  /* The expansion is due to an upwards line wrap so we must partially include
                     it in the update region */
                  nstart_line = line_index;
                  nstart_index = current_line->index;
                  istart = current_line->index + orig_net_length;
                }
            }


            /* Adjust length to include line termination */
            switch (current_line->ending) {
            case END_SOFT:
                  current_line->length = current_line->net_length + 3;
                  break;
                case END_RICH:
                  current_line->length = current_line->net_length + 1;
                  break;
            case END_HARD:
                  current_line->length = current_line->net_length + 2;
                  break;
            case END_WRAP:
            case END_0:
                  current_line->length = current_line->net_length;
                  break;
            }
            es->text_width = max(es->text_width, current_line->width);
            current_position += current_line->length;
            previous_line = current_line;
            current_line = current_line->next;
            line_index++;
      } while (previous_line->ending != END_0);

      /* Finish adjusting line indexes by delta or remove hanging lines */
      if (previous_line->ending == END_0)
      {
            LINEDEF *pnext = NULL;

            previous_line->next = NULL;
            while (current_line)
            {
                  pnext = current_line->next;
                  HeapFree(GetProcessHeap(), 0, current_line);
                  current_line = pnext;
                  es->line_count--;
            }
      }
      else if (delta != 0)
      {
            while (current_line)
            {
                  current_line->index += delta;
                  current_line = current_line->next;
            }
      }

      /* Calculate rest of modification rectangle */
      if (hrgn)
      {
            HRGN tmphrgn;
         /*
            * We calculate two rectangles. One for the first line which may have
            * an indent with respect to the format rect. The other is a format-width
            * rectangle that spans the rest of the lines that changed or moved.
            */
            rc.top = es->format_rect.top + nstart_line * es->line_height -
                  (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
            rc.bottom = rc.top + es->line_height;
            if ((es->style & ES_CENTER) || (es->style & ES_RIGHT))
                  rc.left = es->format_rect.left;
            else
                  rc.left = es->format_rect.left + (INT)LOWORD(GetTabbedTextExtentW(dc,
                              es->text + nstart_index, istart - nstart_index,
                              es->tabs_count, es->tabs)) - es->x_offset; /* Adjust for horz scroll */
            rc.right = es->format_rect.right;
            SetRectRgn(hrgn, rc.left, rc.top, rc.right, rc.bottom);

            rc.top = rc.bottom;
            rc.left = es->format_rect.left;
            rc.right = es->format_rect.right;
         /*
            * If lines were added or removed we must re-paint the remainder of the
          * lines since the remaining lines were either shifted up or down.
            */
            if (line_count < es->line_count) /* We added lines */
                  rc.bottom = es->line_count * es->line_height;
            else if (line_count > es->line_count) /* We removed lines */
                  rc.bottom = line_count * es->line_height;
            else
                  rc.bottom = line_index * es->line_height;
            rc.bottom += es->format_rect.top;
            rc.bottom -= (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
            tmphrgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
            CombineRgn(hrgn, hrgn, tmphrgn, RGN_OR);
            DeleteObject(tmphrgn);
      }

      if (es->font)
            SelectObject(dc, old_font);

      ReleaseDC(es->hwndSelf, dc);
}


static inline UINT get_text_length(EDITSTATE *es)
{
    if(es->text_length == (UINT)-1)
        es->text_length = strlenW(es->text);
    return es->text_length;
}

/*********************************************************************
 *
 *    EDIT_GetPasswordPointer_SL
 *
 *    note: caller should free the (optionally) allocated buffer
 *
 */
static LPWSTR EDIT_GetPasswordPointer_SL(EDITSTATE *es)
{
      if (es->style & ES_PASSWORD) {
            INT len = get_text_length(es);
            LPWSTR text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
            text[len] = '\0';
            while(len) text[--len] = es->password_char;
            return text;
      } else
            return es->text;
}


/*********************************************************************
 *
 *    EDIT_CalcLineWidth_SL
 *
 */
static void EDIT_CalcLineWidth_SL(EDITSTATE *es)
{
      SIZE size;
      LPWSTR text;
      HDC dc;
      HFONT old_font = 0;

      text = EDIT_GetPasswordPointer_SL(es);

      dc = GetDC(es->hwndSelf);
      if (es->font)
            old_font = SelectObject(dc, es->font);

      GetTextExtentPoint32W(dc, text, strlenW(text), &size);

      if (es->font)
            SelectObject(dc, old_font);
      ReleaseDC(es->hwndSelf, dc);

      if (es->style & ES_PASSWORD)
            HeapFree(GetProcessHeap(), 0, text);

      es->text_width = size.cx;
}

/*********************************************************************
 *
 *    EDIT_CharFromPos
 *
 *    Beware: This is not the function called on EM_CHARFROMPOS
 *          The position _can_ be outside the formatting / client
 *          rectangle
 *          The return value is only the character index
 *
 */
static INT EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap)
{
      INT index;
      HDC dc;
      HFONT old_font = 0;
      INT x_high = 0, x_low = 0;

      if (es->style & ES_MULTILINE) {
            INT line = (y - es->format_rect.top) / es->line_height + es->y_offset;
            INT line_index = 0;
            LINEDEF *line_def = es->first_line_def;
            INT low, high;
            while ((line > 0) && line_def->next) {
                  line_index += line_def->length;
                  line_def = line_def->next;
                  line--;
            }
            x += es->x_offset - es->format_rect.left;
            if (es->style & ES_RIGHT)
                  x -= (es->format_rect.right - es->format_rect.left) - line_def->width;
            else if (es->style & ES_CENTER)
                  x -= ((es->format_rect.right - es->format_rect.left) - line_def->width) / 2;
            if (x >= line_def->width) {
                  if (after_wrap)
                        *after_wrap = (line_def->ending == END_WRAP);
                  return line_index + line_def->net_length;
            }
            if (x <= 0) {
                  if (after_wrap)
                        *after_wrap = FALSE;
                  return line_index;
            }
            dc = GetDC(es->hwndSelf);
            if (es->font)
                  old_font = SelectObject(dc, es->font);
                    low = line_index;
                    high = line_index + line_def->net_length + 1;
                    while (low < high - 1)
                    {
                        INT mid = (low + high) / 2;
                        INT x_now = LOWORD(GetTabbedTextExtentW(dc, es->text + line_index, mid - line_index, es->tabs_count, es->tabs));
                        if (x_now > x) {
                            high = mid;
                            x_high = x_now;
                        } else {
                            low = mid;
                            x_low = x_now;
                        }
                    }
                    if (abs(x_high - x) + 1 <= abs(x_low - x))
                        index = high;
                    else
                        index = low;

            if (after_wrap)
                  *after_wrap = ((index == line_index + line_def->net_length) &&
                                          (line_def->ending == END_WRAP));
      } else {
            LPWSTR text;
            SIZE size;
            if (after_wrap)
                  *after_wrap = FALSE;
            x -= es->format_rect.left;
            if (!x)
                  return es->x_offset;

            if (!es->x_offset)
            {
                  INT indent = (es->format_rect.right - es->format_rect.left) - es->text_width;
                  if (es->style & ES_RIGHT)
                        x -= indent;
                  else if (es->style & ES_CENTER)
                        x -= indent / 2;
            }

            text = EDIT_GetPasswordPointer_SL(es);
            dc = GetDC(es->hwndSelf);
            if (es->font)
                  old_font = SelectObject(dc, es->font);
            if (x < 0)
                {
                    INT low = 0;
                    INT high = es->x_offset;
                    while (low < high - 1)
                    {
                        INT mid = (low + high) / 2;
                        GetTextExtentPoint32W( dc, text + mid,
                                               es->x_offset - mid, &size );
                        if (size.cx > -x) {
                            low = mid;
                            x_low = size.cx;
                        } else {
                            high = mid;
                            x_high = size.cx;
                        }
                    }
                    if (abs(x_high + x) <= abs(x_low + x) + 1)
                        index = high;
                    else
                        index = low;
            }
                else
                {
                    INT low = es->x_offset;
                    INT high = get_text_length(es) + 1;
                    while (low < high - 1)
                    {
                        INT mid = (low + high) / 2;
                        GetTextExtentPoint32W( dc, text + es->x_offset,
                                               mid - es->x_offset, &size );
                        if (size.cx > x) {
                               high = mid;
                               x_high = size.cx;
                        } else {
                               low = mid;
                               x_low = size.cx;
                       }
                    }
                   if (abs(x_high - x) <= abs(x_low - x) + 1)
                       index = high;
                   else
                       index = low;
            }
            if (es->style & ES_PASSWORD)
                  HeapFree(GetProcessHeap(), 0, text);
      }
      if (es->font)
            SelectObject(dc, old_font);
      ReleaseDC(es->hwndSelf, dc);
      return index;
}


/*********************************************************************
 *
 *    EDIT_ConfinePoint
 *
 *    adjusts the point to be within the formatting rectangle
 *    (so CharFromPos returns the nearest _visible_ character)
 *
 */
static void EDIT_ConfinePoint(const EDITSTATE *es, LPINT x, LPINT y)
{
      *x = min(max(*x, es->format_rect.left), es->format_rect.right - 1);
      *y = min(max(*y, es->format_rect.top), es->format_rect.bottom - 1);
}


/*********************************************************************
 *
 *    EM_LINEFROMCHAR
 *
 */
static INT EDIT_EM_LineFromChar(EDITSTATE *es, INT index)
{
      INT line;
      LINEDEF *line_def;

      if (!(es->style & ES_MULTILINE))
            return 0;
      if (index > (INT)get_text_length(es))
            return es->line_count - 1;
      if (index == -1)
            index = min(es->selection_start, es->selection_end);

      line = 0;
      line_def = es->first_line_def;
      index -= line_def->length;
      while ((index >= 0) && line_def->next) {
            line++;
            line_def = line_def->next;
            index -= line_def->length;
      }
      return line;
}


/*********************************************************************
 *
 *    EM_LINEINDEX
 *
 */
static INT EDIT_EM_LineIndex(const EDITSTATE *es, INT line)
{
      INT line_index;
      const LINEDEF *line_def;

      if (!(es->style & ES_MULTILINE))
            return 0;
      if (line >= es->line_count)
            return -1;

      line_index = 0;
      line_def = es->first_line_def;
      if (line == -1) {
            INT index = es->selection_end - line_def->length;
            while ((index >= 0) && line_def->next) {
                  line_index += line_def->length;
                  line_def = line_def->next;
                  index -= line_def->length;
            }
      } else {
            while (line > 0) {
                  line_index += line_def->length;
                  line_def = line_def->next;
                  line--;
            }
      }
      return line_index;
}


/*********************************************************************
 *
 *    EM_LINELENGTH
 *
 */
static INT EDIT_EM_LineLength(EDITSTATE *es, INT index)
{
      LINEDEF *line_def;

      if (!(es->style & ES_MULTILINE))
            return get_text_length(es);

      if (index == -1) {
            /* get the number of remaining non-selected chars of selected lines */
            INT32 l; /* line number */
            INT32 li; /* index of first char in line */
            INT32 count;
            l = EDIT_EM_LineFromChar(es, es->selection_start);
            /* # chars before start of selection area */
            count = es->selection_start - EDIT_EM_LineIndex(es, l);
            l = EDIT_EM_LineFromChar(es, es->selection_end);
            /* # chars after end of selection */
            li = EDIT_EM_LineIndex(es, l);
            count += li + EDIT_EM_LineLength(es, li) - es->selection_end;
            return count;
      }
      line_def = es->first_line_def;
      index -= line_def->length;
      while ((index >= 0) && line_def->next) {
            line_def = line_def->next;
            index -= line_def->length;
      }
      return line_def->net_length;
}


/*********************************************************************
 *
 *    EM_POSFROMCHAR
 *
 */
static LRESULT EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap)
{
      INT len = get_text_length(es);
      INT l;
      INT li;
      INT x;
      INT y = 0;
      INT w;
      INT lw = 0;
      INT ll = 0;
      HDC dc;
      HFONT old_font = 0;
      SIZE size;
      LINEDEF *line_def;

      index = min(index, len);
      dc = GetDC(es->hwndSelf);
      if (es->font)
            old_font = SelectObject(dc, es->font);
      if (es->style & ES_MULTILINE) {
            l = EDIT_EM_LineFromChar(es, index);
            y = (l - es->y_offset) * es->line_height;
            li = EDIT_EM_LineIndex(es, l);
            if (after_wrap && (li == index) && l) {
                  INT l2 = l - 1;
                  line_def = es->first_line_def;
                  while (l2) {
                        line_def = line_def->next;
                        l2--;
                  }
                  if (line_def->ending == END_WRAP) {
                        l--;
                        y -= es->line_height;
                        li = EDIT_EM_LineIndex(es, l);
                  }
            }

            line_def = es->first_line_def;
            while (line_def->index != li)
                  line_def = line_def->next;

            ll = line_def->net_length;
            lw = line_def->width;

            w = es->format_rect.right - es->format_rect.left;
            if (es->style & ES_RIGHT)
            {
                  x = LOWORD(GetTabbedTextExtentW(dc, es->text + li + (index - li), ll - (index - li),
                        es->tabs_count, es->tabs)) - es->x_offset;
                  x = w - x;
            }
            else if (es->style & ES_CENTER)
            {
                  x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
                        es->tabs_count, es->tabs)) - es->x_offset;
                  x += (w - lw) / 2;
            }
            else /* ES_LEFT */
            {
                x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
                        es->tabs_count, es->tabs)) - es->x_offset;
            }
      } else {
            LPWSTR text = EDIT_GetPasswordPointer_SL(es);
            if (index < es->x_offset) {
                  GetTextExtentPoint32W(dc, text + index,
                              es->x_offset - index, &size);
                  x = -size.cx;
            } else {
                  GetTextExtentPoint32W(dc, text + es->x_offset,
                              index - es->x_offset, &size);
                   x = size.cx;

                  if (!es->x_offset && (es->style & (ES_RIGHT | ES_CENTER)))
                  {
                        w = es->format_rect.right - es->format_rect.left;
                        if (w > es->text_width)
                        {
                              if (es->style & ES_RIGHT)
                                    x += w - es->text_width;
                              else if (es->style & ES_CENTER)
                                    x += (w - es->text_width) / 2;
                        }
                  }
            }
            y = 0;
            if (es->style & ES_PASSWORD)
                  HeapFree(GetProcessHeap(), 0, text);
      }
      x += es->format_rect.left;
      y += es->format_rect.top;
      if (es->font)
            SelectObject(dc, old_font);
      ReleaseDC(es->hwndSelf, dc);
      return MAKELONG((INT16)x, (INT16)y);
}


/*********************************************************************
 *
 *    EDIT_GetLineRect
 *
 *    Calculates the bounding rectangle for a line from a starting
 *    column to an ending column.
 *
 */
static void EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc)
{
      INT line_index =  EDIT_EM_LineIndex(es, line);

      if (es->style & ES_MULTILINE)
            rc->top = es->format_rect.top + (line - es->y_offset) * es->line_height;
      else
            rc->top = es->format_rect.top;
      rc->bottom = rc->top + es->line_height;
      rc->left = (scol == 0) ? es->format_rect.left : (short)LOWORD(EDIT_EM_PosFromChar(es, line_index + scol, TRUE));
      rc->right = (ecol == -1) ? es->format_rect.right : (short)LOWORD(EDIT_EM_PosFromChar(es, line_index + ecol, TRUE));
}


static inline void text_buffer_changed(EDITSTATE *es)
{
    es->text_length = (UINT)-1;
}

/*********************************************************************
 *
 *    EDIT_LockBuffer
 *
 *    This acts as a LocalLock16(), but it locks only once.  This way
 *    you can call it whenever you like, without unlocking.
 *
 *    Initially the edit control allocates a HLOCAL32 buffer 
 *    (32 bit linear memory handler).  However, 16 bit application
 *    might send an EM_GETHANDLE message and expect a HLOCAL16 (16 bit SEG:OFF
 *    handler).  From that moment on we have to keep using this 16 bit memory
 *    handler, because it is supposed to be valid at all times after EM_GETHANDLE.
 *    What we do is create a HLOCAL16 buffer, copy the text, and do pointer
 *    conversion.
 *
 */
static void EDIT_LockBuffer(EDITSTATE *es)
{
      STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
      HINSTANCE16 hInstance = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );

      if (!es->text) {
          CHAR *textA = NULL;
          UINT countA = 0;
          BOOL _16bit = FALSE;

          if(es->hloc32W)
          {
            if(es->hloc32A)
            {
                TRACE("Synchronizing with 32-bit ANSI buffer\n");
                textA = LocalLock(es->hloc32A);
                countA = strlen(textA) + 1;
            }
            else if(es->hloc16)
            {
                HANDLE16 oldDS = stack16->ds;
                TRACE("Synchronizing with 16-bit ANSI buffer\n");
                stack16->ds = hInstance;
                textA = MapSL(LocalLock16(es->hloc16));
                stack16->ds = oldDS;
                countA = strlen(textA) + 1;
                _16bit = TRUE;
            }
          }
          else {
            ERR("no buffer ... please report\n");
            return;
          }

          if(textA)
          {
            HLOCAL hloc32W_new;
            UINT countW_new = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
            TRACE("%d bytes translated to %d WCHARs\n", countA, countW_new);
            if(countW_new > es->buffer_size + 1)
            {
                UINT alloc_size = ROUND_TO_GROW(countW_new * sizeof(WCHAR));
                TRACE("Resizing 32-bit UNICODE buffer from %d+1 to %d WCHARs\n", es->buffer_size, countW_new);
                hloc32W_new = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
                if(hloc32W_new)
                {
                  es->hloc32W = hloc32W_new;
                  es->buffer_size = LocalSize(hloc32W_new)/sizeof(WCHAR) - 1;
                  TRACE("Real new size %d+1 WCHARs\n", es->buffer_size);
                }
                else
                  WARN("FAILED! Will synchronize partially\n");
            }
          }

          /*TRACE("Locking 32-bit UNICODE buffer\n");*/
          es->text = LocalLock(es->hloc32W);

          if(textA)
          {
            MultiByteToWideChar(CP_ACP, 0, textA, countA, es->text, es->buffer_size + 1);
            if(_16bit)
            {
                HANDLE16 oldDS = stack16->ds;
                stack16->ds = hInstance;
                LocalUnlock16(es->hloc16);
                stack16->ds = oldDS;
            }
            else
                LocalUnlock(es->hloc32A);
          }
      }
        if(es->flags & EF_APP_HAS_HANDLE) text_buffer_changed(es);
      es->lock_count++;
}


/*********************************************************************
 *
 *    EDIT_UnlockBuffer
 *
 */
static void EDIT_UnlockBuffer(EDITSTATE *es, BOOL force)
{

      /* Edit window might be already destroyed */
      if(!IsWindow(es->hwndSelf))
      {
          WARN("edit hwnd %p already destroyed\n", es->hwndSelf);
          return;
      }

      if (!es->lock_count) {
            ERR("lock_count == 0 ... please report\n");
            return;
      }
      if (!es->text) {
            ERR("es->text == 0 ... please report\n");
            return;
      }

      if (force || (es->lock_count == 1)) {
          if (es->hloc32W) {
            CHAR *textA = NULL;
            UINT countA = 0;
            UINT countW = get_text_length(es) + 1;
            STACK16FRAME* stack16 = NULL;
              HANDLE16 oldDS = 0;

            if(es->hloc32A)
            {
                UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
                TRACE("Synchronizing with 32-bit ANSI buffer\n");
                TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
                countA = LocalSize(es->hloc32A);
                if(countA_new > countA)
                {
                  HLOCAL hloc32A_new;
                  UINT alloc_size = ROUND_TO_GROW(countA_new);
                  TRACE("Resizing 32-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
                  hloc32A_new = LocalReAlloc(es->hloc32A, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
                  if(hloc32A_new)
                  {
                      es->hloc32A = hloc32A_new;
                      countA = LocalSize(hloc32A_new);
                      TRACE("Real new size %d bytes\n", countA);
                  }
                  else
                      WARN("FAILED! Will synchronize partially\n");
                }
                textA = LocalLock(es->hloc32A);
            }
            else if(es->hloc16)
            {
                UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);

                TRACE("Synchronizing with 16-bit ANSI buffer\n");
                TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);

                stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
                oldDS = stack16->ds;
                stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );

                countA = LocalSize16(es->hloc16);
                if(countA_new > countA)
                {
                  HLOCAL16 hloc16_new;
                  UINT alloc_size = ROUND_TO_GROW(countA_new);
                  TRACE("Resizing 16-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
                  hloc16_new = LocalReAlloc16(es->hloc16, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
                  if(hloc16_new)
                  {
                      es->hloc16 = hloc16_new;
                      countA = LocalSize16(hloc16_new);
                      TRACE("Real new size %d bytes\n", countA);
                  }
                  else
                      WARN("FAILED! Will synchronize partially\n");
                }
                textA = MapSL(LocalLock16(es->hloc16));
            }

            if(textA)
            {
                WideCharToMultiByte(CP_ACP, 0, es->text, countW, textA, countA, NULL, NULL);
                if(stack16)
                  LocalUnlock16(es->hloc16);
                else
                  LocalUnlock(es->hloc32A);
            }

            if (stack16) stack16->ds = oldDS;
            LocalUnlock(es->hloc32W);
            es->text = NULL;
          }
          else {
            ERR("no buffer ... please report\n");
            return;
          }
      }
      es->lock_count--;
}


/*********************************************************************
 *
 *    EDIT_MakeFit
 *
 * Try to fit size + 1 characters in the buffer.
 */
static BOOL EDIT_MakeFit(EDITSTATE *es, UINT size)
{
      HLOCAL hNew32W;

      if (size <= es->buffer_size)
            return TRUE;

      TRACE("trying to ReAlloc to %d+1 characters\n", size);

      /* Force edit to unlock it's buffer. es->text now NULL */
      EDIT_UnlockBuffer(es, TRUE);

      if (es->hloc32W) {
          UINT alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
          if ((hNew32W = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT))) {
            TRACE("Old 32 bit handle %p, new handle %p\n", es->hloc32W, hNew32W);
            es->hloc32W = hNew32W;
            es->buffer_size = LocalSize(hNew32W)/sizeof(WCHAR) - 1;
          }
      }

      EDIT_LockBuffer(es);

      if (es->buffer_size < size) {
            WARN("FAILED !  We now have %d+1\n", es->buffer_size);
            EDIT_NOTIFY_PARENT(es, EN_ERRSPACE);
            return FALSE;
      } else {
            TRACE("We now have %d+1\n", es->buffer_size);
            return TRUE;
      }
}


/*********************************************************************
 *
 *    EDIT_MakeUndoFit
 *
 *    Try to fit size + 1 bytes in the undo buffer.
 *
 */
static BOOL EDIT_MakeUndoFit(EDITSTATE *es, UINT size)
{
      UINT alloc_size;

      if (size <= es->undo_buffer_size)
            return TRUE;

      TRACE("trying to ReAlloc to %d+1\n", size);

      alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
      if ((es->undo_text = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, es->undo_text, alloc_size))) {
            es->undo_buffer_size = alloc_size/sizeof(WCHAR) - 1;
            return TRUE;
      }
      else
      {
            WARN("FAILED !  We now have %d+1\n", es->undo_buffer_size);
            return FALSE;
      }
}


/*********************************************************************
 *
 *    EDIT_UpdateTextRegion
 *
 */
static void EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase)
{
    if (es->flags & EF_UPDATE) {
        es->flags &= ~EF_UPDATE;
        EDIT_NOTIFY_PARENT(es, EN_UPDATE);
    }
    InvalidateRgn(es->hwndSelf, hrgn, bErase);
}


/*********************************************************************
 *
 *    EDIT_UpdateText
 *
 */
static void EDIT_UpdateText(EDITSTATE *es, const RECT *rc, BOOL bErase)
{
    if (es->flags & EF_UPDATE) {
        es->flags &= ~EF_UPDATE;
        EDIT_NOTIFY_PARENT(es, EN_UPDATE);
    }
    InvalidateRect(es->hwndSelf, rc, bErase);
}

/*********************************************************************
 *
 *    EDIT_SL_InvalidateText
 *
 *    Called from EDIT_InvalidateText().
 *    Does the job for single-line controls only.
 *
 */
static void EDIT_SL_InvalidateText(EDITSTATE *es, INT start, INT end)
{
      RECT line_rect;
      RECT rc;

      EDIT_GetLineRect(es, 0, start, end, &line_rect);
      if (IntersectRect(&rc, &line_rect, &es->format_rect))
            EDIT_UpdateText(es, &rc, TRUE);
}


static inline INT get_vertical_line_count(EDITSTATE *es)
{
      INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
      return max(1,vlc);
}

/*********************************************************************
 *
 *    EDIT_ML_InvalidateText
 *
 *    Called from EDIT_InvalidateText().
 *    Does the job for multi-line controls only.
 *
 */
static void EDIT_ML_InvalidateText(EDITSTATE *es, INT start, INT end)
{
      INT vlc = get_vertical_line_count(es);
      INT sl = EDIT_EM_LineFromChar(es, start);
      INT el = EDIT_EM_LineFromChar(es, end);
      INT sc;
      INT ec;
      RECT rc1;
      RECT rcWnd;
      RECT rcLine;
      RECT rcUpdate;
      INT l;

      if ((el < es->y_offset) || (sl > es->y_offset + vlc))
            return;

      sc = start - EDIT_EM_LineIndex(es, sl);
      ec = end - EDIT_EM_LineIndex(es, el);
      if (sl < es->y_offset) {
            sl = es->y_offset;
            sc = 0;
      }
      if (el > es->y_offset + vlc) {
            el = es->y_offset + vlc;
            ec = EDIT_EM_LineLength(es, EDIT_EM_LineIndex(es, el));
      }
      GetClientRect(es->hwndSelf, &rc1);
      IntersectRect(&rcWnd, &rc1, &es->format_rect);
      if (sl == el) {
            EDIT_GetLineRect(es, sl, sc, ec, &rcLine);
            if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
                  EDIT_UpdateText(es, &rcUpdate, TRUE);
      } else {
            EDIT_GetLineRect(es, sl, sc,
                        EDIT_EM_LineLength(es,
                              EDIT_EM_LineIndex(es, sl)),
                        &rcLine);
            if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
                  EDIT_UpdateText(es, &rcUpdate, TRUE);
            for (l = sl + 1 ; l < el ; l++) {
                  EDIT_GetLineRect(es, l, 0,
                        EDIT_EM_LineLength(es,
                              EDIT_EM_LineIndex(es, l)),
                        &rcLine);
                  if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
                        EDIT_UpdateText(es, &rcUpdate, TRUE);
            }
            EDIT_GetLineRect(es, el, 0, ec, &rcLine);
            if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
                  EDIT_UpdateText(es, &rcUpdate, TRUE);
      }
}


/*********************************************************************
 *
 *    EDIT_InvalidateText
 *
 *    Invalidate the text from offset start up to, but not including,
 *    offset end.  Useful for (re)painting the selection.
 *    Regions outside the linewidth are not invalidated.
 *    end == -1 means end == TextLength.
 *    start and end need not be ordered.
 *
 */
static void EDIT_InvalidateText(EDITSTATE *es, INT start, INT end)
{
      if (end == start)
            return;

      if (end == -1)
            end = get_text_length(es);

      if (end < start) {
          INT tmp = start;
          start = end;
          end = tmp;
      }

      if (es->style & ES_MULTILINE)
            EDIT_ML_InvalidateText(es, start, end);
      else
            EDIT_SL_InvalidateText(es, start, end);
}


/*********************************************************************
 *
 *    EDIT_EM_SetSel
 *
 *    note: unlike the specs say: the order of start and end
 *          _is_ preserved in Windows.  (i.e. start can be > end)
 *          In other words: this handler is OK
 *
 */
static void EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap)
{
      UINT old_start = es->selection_start;
      UINT old_end = es->selection_end;
      UINT len = get_text_length(es);

      if (start == (UINT)-1) {
            start = es->selection_end;
            end = es->selection_end;
      } else {
            start = min(start, len);
            end = min(end, len);
      }
      es->selection_start = start;
      es->selection_end = end;
      if (after_wrap)
            es->flags |= EF_AFTER_WRAP;
      else
            es->flags &= ~EF_AFTER_WRAP;
      /* Compute the necessary invalidation region. */
      /* Note that we don't need to invalidate regions which have
       * "never" been selected, or those which are "still" selected.
       * In fact, every time we hit a selection boundary, we can
       * *toggle* whether we need to invalidate.  Thus we can optimize by
       * *sorting* the interval endpoints.  Let's assume that we sort them
       * in this order:
       *        start <= end <= old_start <= old_end
       * Knuth 5.3.1 (p 183) assures us that this can be done optimally
       * in 5 comparisons; i.e. it is impossible to do better than the
       * following: */
        ORDER_UINT(end, old_end);
        ORDER_UINT(start, old_start);
        ORDER_UINT(old_start, old_end);
        ORDER_UINT(start, end);
      /* Note that at this point 'end' and 'old_start' are not in order, but
       * start is definitely the min. and old_end is definitely the max. */
      if (end != old_start)
        {
/*
 * One can also do
 *          ORDER_UINT32(end, old_start);
 *          EDIT_InvalidateText(es, start, end);
 *          EDIT_InvalidateText(es, old_start, old_end);
 * in place of the following if statement.
 * (That would complete the optimal five-comparison four-element sort.)
 */
            if (old_start > end )
            {
                EDIT_InvalidateText(es, start, end);
                EDIT_InvalidateText(es, old_start, old_end);
            }
            else
            {
                EDIT_InvalidateText(es, start, old_start);
                EDIT_InvalidateText(es, end, old_end);
            }
      }
        else EDIT_InvalidateText(es, start, old_end);
}


/*********************************************************************
 *
 *    EDIT_UpdateScrollInfo
 *
 */
static void EDIT_UpdateScrollInfo(EDITSTATE *es)
{
    if ((es->style & WS_VSCROLL) && !(es->flags & EF_VSCROLL_TRACK))
    {
      SCROLLINFO si;
      si.cbSize   = sizeof(SCROLLINFO);
      si.fMask    = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
      si.nMin           = 0;
      si.nMax           = es->line_count - 1;
      si.nPage    = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
      si.nPos           = es->y_offset;
      TRACE("SB_VERT, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
            si.nMin, si.nMax, si.nPage, si.nPos);
      SetScrollInfo(es->hwndSelf, SB_VERT, &si, TRUE);
    }

    if ((es->style & WS_HSCROLL) && !(es->flags & EF_HSCROLL_TRACK))
    {
      SCROLLINFO si;
      si.cbSize   = sizeof(SCROLLINFO);
      si.fMask    = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
      si.nMin           = 0;
      si.nMax           = es->text_width - 1;
      si.nPage    = es->format_rect.right - es->format_rect.left;
      si.nPos           = es->x_offset;
      TRACE("SB_HORZ, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
            si.nMin, si.nMax, si.nPage, si.nPos);
      SetScrollInfo(es->hwndSelf, SB_HORZ, &si, TRUE);
    }
}


/*********************************************************************
 *
 *    EDIT_EM_LineScroll_internal
 *
 *    Version of EDIT_EM_LineScroll for internal use.
 *    It doesn't refuse if ES_MULTILINE is set and assumes that
 *    dx is in pixels, dy - in lines.
 *
 */
static BOOL EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy)
{
      INT nyoff;
      INT x_offset_in_pixels;
      INT lines_per_page = (es->format_rect.bottom - es->format_rect.top) /
                        es->line_height;

      if (es->style & ES_MULTILINE)
      {
          x_offset_in_pixels = es->x_offset;
      }
      else
      {
          dy = 0;
          x_offset_in_pixels = (short)LOWORD(EDIT_EM_PosFromChar(es, es->x_offset, FALSE));
      }

      if (-dx > x_offset_in_pixels)
            dx = -x_offset_in_pixels;
      if (dx > es->text_width - x_offset_in_pixels)
            dx = es->text_width - x_offset_in_pixels;
      nyoff = max(0, es->y_offset + dy);
      if (nyoff >= es->line_count - lines_per_page)
            nyoff = max(0, es->line_count - lines_per_page);
      dy = (es->y_offset - nyoff) * es->line_height;
      if (dx || dy) {
            RECT rc1;
            RECT rc;

            es->y_offset = nyoff;
            if(es->style & ES_MULTILINE)
                es->x_offset += dx;
            else
                es->x_offset += dx / es->char_width;

            GetClientRect(es->hwndSelf, &rc1);
            IntersectRect(&rc, &rc1, &es->format_rect);
            ScrollWindowEx(es->hwndSelf, -dx, dy,
                        NULL, &rc, NULL, NULL, SW_INVALIDATE);
            /* force scroll info update */
            EDIT_UpdateScrollInfo(es);
      }
      if (dx && !(es->flags & EF_HSCROLL_TRACK))
            EDIT_NOTIFY_PARENT(es, EN_HSCROLL);
      if (dy && !(es->flags & EF_VSCROLL_TRACK))
            EDIT_NOTIFY_PARENT(es, EN_VSCROLL);
      return TRUE;
}

/*********************************************************************
 *
 *    EM_LINESCROLL
 *
 *    NOTE: dx is in average character widths, dy - in lines;
 *
 */
static BOOL EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy)
{
      if (!(es->style & ES_MULTILINE))
            return FALSE;

      dx *= es->char_width;
      return EDIT_EM_LineScroll_internal(es, dx, dy);
}


/*********************************************************************
 *
 *    EM_SCROLL
 *
 */
static LRESULT EDIT_EM_Scroll(EDITSTATE *es, INT action)
{
      INT dy;

      if (!(es->style & ES_MULTILINE))
            return (LRESULT)FALSE;

      dy = 0;

      switch (action) {
      case SB_LINEUP:
            if (es->y_offset)
                  dy = -1;
            break;
      case SB_LINEDOWN:
            if (es->y_offset < es->line_count - 1)
                  dy = 1;
            break;
      case SB_PAGEUP:
            if (es->y_offset)
                  dy = -(es->format_rect.bottom - es->format_rect.top) / es->line_height;
            break;
      case SB_PAGEDOWN:
            if (es->y_offset < es->line_count - 1)
                  dy = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
            break;
      default:
            return (LRESULT)FALSE;
      }
      if (dy) {
          INT vlc = get_vertical_line_count(es);
          /* check if we are going to move too far */
          if(es->y_offset + dy > es->line_count - vlc)
            dy = es->line_count - vlc - es->y_offset;

          /* Notification is done in EDIT_EM_LineScroll */
          if(dy)
            EDIT_EM_LineScroll(es, 0, dy);
      }
      return MAKELONG((INT16)dy, (BOOL16)TRUE);
}


/*********************************************************************
 *
 *    EDIT_SetCaretPos
 *
 */
static void EDIT_SetCaretPos(EDITSTATE *es, INT pos,
                       BOOL after_wrap)
{
      LRESULT res = EDIT_EM_PosFromChar(es, pos, after_wrap);
      TRACE("%d - %dx%d\n", pos, (short)LOWORD(res), (short)HIWORD(res));
      SetCaretPos((short)LOWORD(res), (short)HIWORD(res));
}


/*********************************************************************
 *
 *    EM_SCROLLCARET
 *
 */
static void EDIT_EM_ScrollCaret(EDITSTATE *es)
{
      if (es->style & ES_MULTILINE) {
            INT l;
            INT vlc;
            INT ww;
            INT cw = es->char_width;
            INT x;
            INT dy = 0;
            INT dx = 0;

            l = EDIT_EM_LineFromChar(es, es->selection_end);
            x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP));
            vlc = get_vertical_line_count(es);
            if (l >= es->y_offset + vlc)
                  dy = l - vlc + 1 - es->y_offset;
            if (l < es->y_offset)
                  dy = l - es->y_offset;
            ww = es->format_rect.right - es->format_rect.left;
            if (x < es->format_rect.left)
                  dx = x - es->format_rect.left - ww / HSCROLL_FRACTION / cw * cw;
            if (x > es->format_rect.right)
                  dx = x - es->format_rect.left - (HSCROLL_FRACTION - 1) * ww / HSCROLL_FRACTION / cw * cw;
            if (dy || dx || (es->y_offset && (es->line_count - es->y_offset < vlc)))
            {
                /* check if we are going to move too far */
                if(es->x_offset + dx + ww > es->text_width)
                  dx = es->text_width - ww - es->x_offset;
                if(dx || dy || (es->y_offset && (es->line_count - es->y_offset < vlc)))
                  EDIT_EM_LineScroll_internal(es, dx, dy);
            }
      } else {
            INT x;
            INT goal;
            INT format_width;

            x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
            format_width = es->format_rect.right - es->format_rect.left;
            if (x < es->format_rect.left) {
                  goal = es->format_rect.left + format_width / HSCROLL_FRACTION;
                  do {
                        es->x_offset--;
                        x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
                  } while ((x < goal) && es->x_offset);
                  /* FIXME: use ScrollWindow() somehow to improve performance */
                  EDIT_UpdateText(es, NULL, TRUE);
            } else if (x > es->format_rect.right) {
                  INT x_last;
                  INT len = get_text_length(es);
                  goal = es->format_rect.right - format_width / HSCROLL_FRACTION;
                  do {
                        es->x_offset++;
                        x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
                        x_last = (short)LOWORD(EDIT_EM_PosFromChar(es, len, FALSE));
                  } while ((x > goal) && (x_last > es->format_rect.right));
                  /* FIXME: use ScrollWindow() somehow to improve performance */
                  EDIT_UpdateText(es, NULL, TRUE);
            }
      }

    if(es->flags & EF_FOCUSED)
      EDIT_SetCaretPos(es, es->selection_end, es->flags & EF_AFTER_WRAP);
}


/*********************************************************************
 *
 *    EDIT_MoveBackward
 *
 */
static void EDIT_MoveBackward(EDITSTATE *es, BOOL extend)
{
      INT e = es->selection_end;

      if (e) {
            e--;
            if ((es->style & ES_MULTILINE) && e &&
                        (es->text[e - 1] == '\r') && (es->text[e] == '\n')) {
                  e--;
                  if (e && (es->text[e - 1] == '\r'))
                        e--;
            }
      }
      EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveDown_ML
 *
 *    Only for multi line controls
 *    Move the caret one line down, on a column with the nearest
 *    x coordinate on the screen (might be a different column).
 *
 */
static void EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
      LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
      INT x = (short)LOWORD(pos);
      INT y = (short)HIWORD(pos);

      e = EDIT_CharFromPos(es, x, y + es->line_height, &after_wrap);
      if (!extend)
            s = e;
      EDIT_EM_SetSel(es, s, e, after_wrap);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveEnd
 *
 */
static void EDIT_MoveEnd(EDITSTATE *es, BOOL extend, BOOL ctrl)
{
      BOOL after_wrap = FALSE;
      INT e;

      /* Pass a high value in x to make sure of receiving the end of the line */
      if (!ctrl && (es->style & ES_MULTILINE))
            e = EDIT_CharFromPos(es, 0x3fffffff,
                  HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), &after_wrap);
      else
            e = get_text_length(es);
      EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, after_wrap);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveForward
 *
 */
static void EDIT_MoveForward(EDITSTATE *es, BOOL extend)
{
      INT e = es->selection_end;

      if (es->text[e]) {
            e++;
            if ((es->style & ES_MULTILINE) && (es->text[e - 1] == '\r')) {
                  if (es->text[e] == '\n')
                        e++;
                  else if ((es->text[e] == '\r') && (es->text[e + 1] == '\n'))
                        e += 2;
            }
      }
      EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveHome
 *
 *    Home key: move to beginning of line.
 *
 */
static void EDIT_MoveHome(EDITSTATE *es, BOOL extend, BOOL ctrl)
{
      INT e;

      /* Pass the x_offset in x to make sure of receiving the first position of the line */
      if (!ctrl && (es->style & ES_MULTILINE))
            e = EDIT_CharFromPos(es, -es->x_offset,
                  HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), NULL);
      else
            e = 0;
      EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MovePageDown_ML
 *
 *    Only for multi line controls
 *    Move the caret one page down, on a column with the nearest
 *    x coordinate on the screen (might be a different column).
 *
 */
static void EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
      LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
      INT x = (short)LOWORD(pos);
      INT y = (short)HIWORD(pos);

      e = EDIT_CharFromPos(es, x,
            y + (es->format_rect.bottom - es->format_rect.top),
            &after_wrap);
      if (!extend)
            s = e;
      EDIT_EM_SetSel(es, s, e, after_wrap);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MovePageUp_ML
 *
 *    Only for multi line controls
 *    Move the caret one page up, on a column with the nearest
 *    x coordinate on the screen (might be a different column).
 *
 */
static void EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
      LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
      INT x = (short)LOWORD(pos);
      INT y = (short)HIWORD(pos);

      e = EDIT_CharFromPos(es, x,
            y - (es->format_rect.bottom - es->format_rect.top),
            &after_wrap);
      if (!extend)
            s = e;
      EDIT_EM_SetSel(es, s, e, after_wrap);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveUp_ML
 *
 *    Only for multi line controls
 *    Move the caret one line up, on a column with the nearest
 *    x coordinate on the screen (might be a different column).
 *
 */
static void EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
      LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
      INT x = (short)LOWORD(pos);
      INT y = (short)HIWORD(pos);

      e = EDIT_CharFromPos(es, x, y - es->line_height, &after_wrap);
      if (!extend)
            s = e;
      EDIT_EM_SetSel(es, s, e, after_wrap);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveWordBackward
 *
 */
static void EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      INT l;
      INT ll;
      INT li;

      l = EDIT_EM_LineFromChar(es, e);
      ll = EDIT_EM_LineLength(es, e);
      li = EDIT_EM_LineIndex(es, l);
      if (e - li == 0) {
            if (l) {
                  li = EDIT_EM_LineIndex(es, l - 1);
                  e = li + EDIT_EM_LineLength(es, li);
            }
      } else {
            e = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_LEFT);
      }
      if (!extend)
            s = e;
      EDIT_EM_SetSel(es, s, e, FALSE);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_MoveWordForward
 *
 */
static void EDIT_MoveWordForward(EDITSTATE *es, BOOL extend)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      INT l;
      INT ll;
      INT li;

      l = EDIT_EM_LineFromChar(es, e);
      ll = EDIT_EM_LineLength(es, e);
      li = EDIT_EM_LineIndex(es, l);
      if (e - li == ll) {
            if ((es->style & ES_MULTILINE) && (l != es->line_count - 1))
                  e = EDIT_EM_LineIndex(es, l + 1);
      } else {
            e = li + EDIT_CallWordBreakProc(es,
                        li, e - li + 1, ll, WB_RIGHT);
      }
      if (!extend)
            s = e;
      EDIT_EM_SetSel(es, s, e, FALSE);
      EDIT_EM_ScrollCaret(es);
}


/*********************************************************************
 *
 *    EDIT_PaintText
 *
 */
static INT EDIT_PaintText(EDITSTATE *es, HDC dc, INT x, INT y, INT line, INT col, INT count, BOOL rev)
{
      COLORREF BkColor;
      COLORREF TextColor;
      LOGFONTW underline_font;
      HFONT hUnderline = 0;
      HFONT old_font = 0;
      INT ret;
      INT li;
      INT BkMode;
      SIZE size;

      if (!count)
            return 0;
      BkMode = GetBkMode(dc);
      BkColor = GetBkColor(dc);
      TextColor = GetTextColor(dc);
      if (rev) {
              if (es->composition_len == 0)
              {
                  SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
                  SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
                  SetBkMode( dc, OPAQUE);
              }
            else
            {
                  HFONT current = GetCurrentObject(dc,OBJ_FONT);
                  GetObjectW(current,sizeof(LOGFONTW),&underline_font);
                  underline_font.lfUnderline = TRUE;
                        hUnderline = CreateFontIndirectW(&underline_font);
                  old_font = SelectObject(dc,hUnderline);
              }
      }
      li = EDIT_EM_LineIndex(es, line);
      if (es->style & ES_MULTILINE) {
            ret = (INT)LOWORD(TabbedTextOutW(dc, x, y, es->text + li + col, count,
                              es->tabs_count, es->tabs, es->format_rect.left - es->x_offset));
      } else {
            LPWSTR text = EDIT_GetPasswordPointer_SL(es);
            TextOutW(dc, x, y, text + li + col, count);
            GetTextExtentPoint32W(dc, text + li + col, count, &size);
            ret = size.cx;
            if (es->style & ES_PASSWORD)
                  HeapFree(GetProcessHeap(), 0, text);
      }
      if (rev) {
            if (es->composition_len == 0)
            {
                  SetBkColor(dc, BkColor);
                  SetTextColor(dc, TextColor);
                  SetBkMode( dc, BkMode);
            }
            else
            {
                  if (old_font)
                        SelectObject(dc,old_font);
                  if (hUnderline)
                        DeleteObject(hUnderline);
              }
      }
      return ret;
}


/*********************************************************************
 *
 *    EDIT_PaintLine
 *
 */
static void EDIT_PaintLine(EDITSTATE *es, HDC dc, INT line, BOOL rev)
{
      INT s = es->selection_start;
      INT e = es->selection_end;
      INT li;
      INT ll;
      INT x;
      INT y;
      LRESULT pos;

      if (es->style & ES_MULTILINE) {
            INT vlc = get_vertical_line_count(es);

            if ((line < es->y_offset) || (line > es->y_offset + vlc) || (line >= es->line_count))
                  return;
      } else if (line)
            return;

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

      pos = EDIT_EM_PosFromChar(es, EDIT_EM_LineIndex(es, line), FALSE);
      x = (short)LOWORD(pos);
      y = (short)HIWORD(pos);
      li = EDIT_EM_LineIndex(es, line);
      ll = EDIT_EM_LineLength(es, li);
      s = min(es->selection_start, es->selection_end);
      e = max(es->selection_start, es->selection_end);
      s = min(li + ll, max(li, s));
      e = min(li + ll, max(li, e));
      if (rev && (s != e) &&
                  ((es->flags & EF_FOCUSED) || (es->style & ES_NOHIDESEL))) {
            x += EDIT_PaintText(es, dc, x, y, line, 0, s - li, FALSE);
            x += EDIT_PaintText(es, dc, x, y, line, s - li, e - s, TRUE);
            x += EDIT_PaintText(es, dc, x, y, line, e - li, li + ll - e, FALSE);
      } else
            x += EDIT_PaintText(es, dc, x, y, line, 0, ll, FALSE);
}


/*********************************************************************
 *
 *    EDIT_AdjustFormatRect
 *
 *    Adjusts the format rectangle for the current font and the
 *    current client rectangle.
 *
 */
static void EDIT_AdjustFormatRect(EDITSTATE *es)
{
      RECT ClientRect;

      es->format_rect.right = max(es->format_rect.right, es->format_rect.left + es->char_width);
      if (es->style & ES_MULTILINE)
      {
          INT fw, vlc, max_x_offset, max_y_offset;

          vlc = get_vertical_line_count(es);
          es->format_rect.bottom = es->format_rect.top + vlc * es->line_height;

          /* correct es->x_offset */
          fw = es->format_rect.right - es->format_rect.left;
          max_x_offset = es->text_width - fw;
          if(max_x_offset < 0) max_x_offset = 0;
          if(es->x_offset > max_x_offset)
            es->x_offset = max_x_offset;

          /* correct es->y_offset */
          max_y_offset = es->line_count - vlc;
          if(max_y_offset < 0) max_y_offset = 0;
          if(es->y_offset > max_y_offset)
            es->y_offset = max_y_offset;

          /* force scroll info update */
          EDIT_UpdateScrollInfo(es);
      }
      else
      /* Windows doesn't care to fix text placement for SL controls */
            es->format_rect.bottom = es->format_rect.top + es->line_height;

      /* Always stay within the client area */
      GetClientRect(es->hwndSelf, &ClientRect);
      es->format_rect.bottom = min(es->format_rect.bottom, ClientRect.bottom);

      if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL))
            EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
      
      EDIT_SetCaretPos(es, es->selection_end, es->flags & EF_AFTER_WRAP);
}


/*********************************************************************
 *
 *    EDIT_SetRectNP
 *
 *    note: this is not (exactly) the handler called on EM_SETRECTNP
 *          it is also used to set the rect of a single line control
 *
 */
static void EDIT_SetRectNP(EDITSTATE *es, const RECT *rc)
{
      LONG_PTR ExStyle;
      INT bw, bh;
      ExStyle = GetWindowLongPtrW(es->hwndSelf, GWL_EXSTYLE);
      
      CopyRect(&es->format_rect, rc);
      
      if (ExStyle & WS_EX_CLIENTEDGE) {
            es->format_rect.left++;
            es->format_rect.right--;
            
            if (es->format_rect.bottom - es->format_rect.top
                >= es->line_height + 2)
            {
                  es->format_rect.top++;
                  es->format_rect.bottom--;
            }
      }
      else if (es->style & WS_BORDER) {
            bw = GetSystemMetrics(SM_CXBORDER) + 1;
            bh = GetSystemMetrics(SM_CYBORDER) + 1;
            es->format_rect.left += bw;
            es->format_rect.right -= bw;
            if (es->format_rect.bottom - es->format_rect.top
              >= es->line_height + 2 * bh)
            {
                es->format_rect.top += bh;
                es->format_rect.bottom -= bh;
            }
      }
      
      es->format_rect.left += es->left_margin;
      es->format_rect.right -= es->right_margin;
      EDIT_AdjustFormatRect(es);
}


/*********************************************************************
 *
 *    EM_CHARFROMPOS
 *
 *      returns line number (not index) in high-order word of result.
 *      NB : Q137805 is unclear about this. POINT * pointer in lParam apply
 *      to Richedit, not to the edit control. Original documentation is valid.
 *    FIXME: do the specs mean to return -1 if outside client area or
 *          if outside formatting rectangle ???
 *
 */
static LRESULT EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y)
{
      POINT pt;
      RECT rc;
      INT index;

      pt.x = x;
      pt.y = y;
      GetClientRect(es->hwndSelf, &rc);
      if (!PtInRect(&rc, pt))
            return -1;

      index = EDIT_CharFromPos(es, x, y, NULL);
      return MAKELONG(index, EDIT_EM_LineFromChar(es, index));
}


/*********************************************************************
 *
 *    EM_FMTLINES
 *
 * Enable or disable soft breaks.
 * 
 * This means: insert or remove the soft linebreak character (\r\r\n).
 * Take care to check if the text still fits the buffer after insertion.
 * If not, notify with EN_ERRSPACE.
 * 
 */
static BOOL EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol)
{
      es->flags &= ~EF_USE_SOFTBRK;
      if (add_eol) {
            es->flags |= EF_USE_SOFTBRK;
            FIXME("soft break enabled, not implemented\n");
      }
      return add_eol;
}


/*********************************************************************
 *
 *    EM_GETHANDLE
 *
 *    Hopefully this won't fire back at us.
 *    We always start with a fixed buffer in the local heap.
 *    Despite of the documentation says that the local heap is used
 *    only if DS_LOCALEDIT flag is set, NT and 2000 always allocate
 *    buffer on the local heap.
 *
 */
static HLOCAL EDIT_EM_GetHandle(EDITSTATE *es)
{
      HLOCAL hLocal;

      if (!(es->style & ES_MULTILINE))
            return 0;

      if(es->is_unicode)
          hLocal = es->hloc32W;
      else
      {
          if(!es->hloc32A)
          {
            CHAR *textA;
            UINT countA, alloc_size;
            TRACE("Allocating 32-bit ANSI alias buffer\n");
            countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
            alloc_size = ROUND_TO_GROW(countA);
            if(!(es->hloc32A = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
            {
                ERR("Could not allocate %d bytes for 32-bit ANSI alias buffer\n", alloc_size);
                return 0;
            }
            textA = LocalLock(es->hloc32A);
            WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
            LocalUnlock(es->hloc32A);
          }
          hLocal = es->hloc32A;
      }

        es->flags |= EF_APP_HAS_HANDLE;
      TRACE("Returning %p, LocalSize() = %ld\n", hLocal, LocalSize(hLocal));
      return hLocal;
}


/*********************************************************************
 *
 *    EM_GETHANDLE16
 *
 *    Hopefully this won't fire back at us.
 *    We always start with a buffer in 32 bit linear memory.
 *    However, with this message a 16 bit application requests
 *    a handle of 16 bit local heap memory, where it expects to find
 *    the text.
 *    It's a pitty that from this moment on we have to use this
 *    local heap, because applications may rely on the handle
 *    in the future.
 *
 *    In this function we'll try to switch to local heap.
 */
static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es)
{
      CHAR *textA;
      UINT countA, alloc_size;
      STACK16FRAME* stack16;
      HANDLE16 oldDS;

      if (!(es->style & ES_MULTILINE))
            return 0;

      if (es->hloc16)
            return es->hloc16;

      stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
      oldDS = stack16->ds;
      stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );

      if (!LocalHeapSize16()) {

            if (!LocalInit16(stack16->ds, 0, GlobalSize16(stack16->ds))) {
                  ERR("could not initialize local heap\n");
                  goto done;
            }
            TRACE("local heap initialized\n");
      }

      countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
      alloc_size = ROUND_TO_GROW(countA);

      TRACE("Allocating 16-bit ANSI alias buffer\n");
      if (!(es->hloc16 = LocalAlloc16(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size))) {
            ERR("could not allocate new 16 bit buffer\n");
            goto done;
      }

      if (!(textA = MapSL(LocalLock16( es->hloc16)))) {
            ERR("could not lock new 16 bit buffer\n");
            LocalFree16(es->hloc16);
            es->hloc16 = 0;
            goto done;
      }

      WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
      LocalUnlock16(es->hloc16);
        es->flags |= EF_APP_HAS_HANDLE;

      TRACE("Returning %04X, LocalSize() = %d\n", es->hloc16, LocalSize16(es->hloc16));

done:
      stack16->ds = oldDS;
      return es->hloc16;
}


/*********************************************************************
 *
 *    EM_GETLINE
 *
 */
static INT EDIT_EM_GetLine(EDITSTATE *es, INT line, LPWSTR dst, BOOL unicode)
{
      LPWSTR src;
      INT line_len, dst_len;
      INT i;

      if (es->style & ES_MULTILINE) {
            if (line >= es->line_count)
                  return 0;
      } else
            line = 0;
      i = EDIT_EM_LineIndex(es, line);
      src = es->text + i;
      line_len = EDIT_EM_LineLength(es, i);
      dst_len = *(WORD *)dst;
      if(unicode)
      {
          if(dst_len <= line_len)
          {
            memcpy(dst, src, dst_len * sizeof(WCHAR));
            return dst_len;
          }
          else /* Append 0 if enough space */
          {
            memcpy(dst, src, line_len * sizeof(WCHAR));
            dst[line_len] = 0;
            return line_len;
          }
      }
      else
      {
          INT ret = WideCharToMultiByte(CP_ACP, 0, src, line_len, (LPSTR)dst, dst_len, NULL, NULL);
          if(!ret && line_len) /* Insufficient buffer size */
            return dst_len;
          if(ret < dst_len) /* Append 0 if enough space */
            ((LPSTR)dst)[ret] = 0;
          return ret;
      }
}


/*********************************************************************
 *
 *    EM_GETSEL
 *
 */
static LRESULT EDIT_EM_GetSel(const EDITSTATE *es, PUINT start, PUINT end)
{
      UINT s = es->selection_start;
      UINT e = es->selection_end;

      ORDER_UINT(s, e);
      if (start)
            *start = s;
      if (end)
            *end = e;
      return MAKELONG(s, e);
}


/*********************************************************************
 *
 *    EM_REPLACESEL
 *
 *    FIXME: handle ES_NUMBER and ES_OEMCONVERT here
 *
 */
static void EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit)
{
      UINT strl = strlenW(lpsz_replace);
      UINT tl = get_text_length(es);
      UINT utl;
      UINT s;
      UINT e;
      UINT i;
      UINT size;
      LPWSTR p;
      HRGN hrgn = 0;
      LPWSTR buf = NULL;
      UINT bufl = 0;

      TRACE("%s, can_undo %d, send_update %d\n",
          debugstr_w(lpsz_replace), can_undo, send_update);

      s = es->selection_start;
      e = es->selection_end;

      if ((s == e) && !strl)
            return;

      ORDER_UINT(s, e);

      size = tl - (e - s) + strl;
      if (!size)
            es->text_width = 0;

      /* Issue the EN_MAXTEXT notification and continue with replacing text
       * such that buffer limit is honored. */
      if ((honor_limit) && (size > es->buffer_limit)) {
            EDIT_NOTIFY_PARENT(es, EN_MAXTEXT);
            /* Buffer limit can be smaller than the actual length of text in combobox */
            if (es->buffer_limit < (tl - (e-s)))
                  strl = 0;
            else
                  strl = es->buffer_limit - (tl - (e-s));
      }

      if (!EDIT_MakeFit(es, tl - (e - s) + strl))
            return;

      if (e != s) {
            /* there is something to be deleted */
            TRACE("deleting stuff.\n");
            bufl = e - s;
            buf = HeapAlloc(GetProcessHeap(), 0, (bufl + 1) * sizeof(WCHAR));
            if (!buf) return;
            memcpy(buf, es->text + s, bufl * sizeof(WCHAR));
            buf[bufl] = 0; /* ensure 0 termination */
            /* now delete */
            strcpyW(es->text + s, es->text + e);
                text_buffer_changed(es);
      }
      if (strl) {
            /* there is an insertion */
            tl = get_text_length(es);
            TRACE("inserting stuff (tl %d, strl %d, selstart %d (%s), text %s)\n", tl, strl, s, debugstr_w(es->text + s), debugstr_w(es->text));
            for (p = es->text + tl ; p >= es->text + s ; p--)
                  p[strl] = p[0];
            for (i = 0 , p = es->text + s ; i < strl ; i++)
                  p[i] = lpsz_replace[i];
            if(es->style & ES_UPPERCASE)
                  CharUpperBuffW(p, strl);
            else if(es->style & ES_LOWERCASE)
                  CharLowerBuffW(p, strl);
                text_buffer_changed(es);
      }
      if (es->style & ES_MULTILINE)
      {
            INT st = min(es->selection_start, es->selection_end);
            INT vlc = get_vertical_line_count(es);

            hrgn = CreateRectRgn(0, 0, 0, 0);
            EDIT_BuildLineDefs_ML(es, st, st + strl,
                        strl - abs(es->selection_end - es->selection_start), hrgn);
            /* if text is too long undo all changes */
            if (honor_limit && !(es->style & ES_AUTOVSCROLL) && (es->line_count > vlc)) {
                  if (strl)
                        strcpyW(es->text + e, es->text + e + strl);
                  if (e != s)
                        for (i = 0 , p = es->text ; i < e - s ; i++)
                              p[i + s] = buf[i];
                        text_buffer_changed(es);
                  EDIT_BuildLineDefs_ML(es, s, e, 
                        abs(es->selection_end - es->selection_start) - strl, hrgn);
                  strl = 0;
                  e = s;
                  hrgn = CreateRectRgn(0, 0, 0, 0);
                  EDIT_NOTIFY_PARENT(es, EN_MAXTEXT);
            }
      }
      else {
            INT fw = es->format_rect.right - es->format_rect.left;
            EDIT_CalcLineWidth_SL(es);
            /* remove chars that don't fit */
            if (honor_limit && !(es->style & ES_AUTOHSCROLL) && (es->text_width > fw)) {
                  while ((es->text_width > fw) && s + strl >= s) {
                        strcpyW(es->text + s + strl - 1, es->text + s + strl);
                        strl--;
                        EDIT_CalcLineWidth_SL(es);
                  }
                        text_buffer_changed(es);
                  EDIT_NOTIFY_PARENT(es, EN_MAXTEXT);
            }
      }
      
      if (e != s) {
            if (can_undo) {
                  utl = strlenW(es->undo_text);
                  if (!es->undo_insert_count && (*es->undo_text && (s == es->undo_position))) {
                        /* undo-buffer is extended to the right */
                        EDIT_MakeUndoFit(es, utl + e - s);
                        memcpy(es->undo_text + utl, buf, (e - s)*sizeof(WCHAR));
                        (es->undo_text + utl)[e - s] = 0; /* ensure 0 termination */
                  } else if (!es->undo_insert_count && (*es->undo_text && (e == es->undo_position))) {
                        /* undo-buffer is extended to the left */
                        EDIT_MakeUndoFit(es, utl + e - s);
                        for (p = es->undo_text + utl ; p >= es->undo_text ; p--)
                              p[e - s] = p[0];
                        for (i = 0 , p = es->undo_text ; i < e - s ; i++)
                              p[i] = buf[i];
                        es->undo_position = s;
                  } else {
                        /* new undo-buffer */
                        EDIT_MakeUndoFit(es, e - s);
                        memcpy(es->undo_text, buf, (e - s)*sizeof(WCHAR));
                        es->undo_text[e - s] = 0; /* ensure 0 termination */
                        es->undo_position = s;
                  }
                  /* any deletion makes the old insertion-undo invalid */
                  es->undo_insert_count = 0;
            } else
                  EDIT_EM_EmptyUndoBuffer(es);
      }
      if (strl) {
            if (can_undo) {
                  if ((s == es->undo_position) ||
                        ((es->undo_insert_count) &&
                        (s == es->undo_position + es->undo_insert_count)))
                        /*
                         * insertion is new and at delete position or
                         * an extension to either left or right
                         */
                        es->undo_insert_count += strl;
                  else {
                        /* new insertion undo */
                        es->undo_position = s;
                        es->undo_insert_count = strl;
                        /* new insertion makes old delete-buffer invalid */
                        *es->undo_text = '\0';
                  }
            } else
                  EDIT_EM_EmptyUndoBuffer(es);
      }

      if (bufl)
            HeapFree(GetProcessHeap(), 0, buf);
 
      s += strl;

      /* If text has been deleted and we're right or center aligned then scroll rightward */
      if (es->style & (ES_RIGHT | ES_CENTER))
      {
            INT delta = strl - abs(es->selection_end - es->selection_start);

            if (delta < 0 && es->x_offset)
            {
                  if (abs(delta) > es->x_offset)
                        es->x_offset = 0;
                  else
                        es->x_offset += delta;
            }
      }

      EDIT_EM_SetSel(es, s, s, FALSE);
      es->flags |= EF_MODIFIED;
      if (send_update) es->flags |= EF_UPDATE;
      if (hrgn)
      {
            EDIT_UpdateTextRegion(es, hrgn, TRUE);
            DeleteObject(hrgn);
      }
      else
            EDIT_UpdateText(es, NULL, TRUE);

      EDIT_EM_ScrollCaret(es);

      /* force scroll info update */
      EDIT_UpdateScrollInfo(es);


        if(send_update || (es->flags & EF_UPDATE))
      {
          es->flags &= ~EF_UPDATE;
          EDIT_NOTIFY_PARENT(es, EN_CHANGE);
      }
}


/*********************************************************************
 *
 *    EM_SETHANDLE
 *
 *    FIXME:      ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
 *
 */
static void EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc)
{
      if (!(es->style & ES_MULTILINE))
            return;

      if (!hloc) {
            WARN("called with NULL handle\n");
            return;
      }

      EDIT_UnlockBuffer(es, TRUE);

      if(es->hloc16)
      {
          STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
          HANDLE16 oldDS = stack16->ds;
      
          stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
          LocalFree16(es->hloc16);
          stack16->ds = oldDS;
          es->hloc16 = 0;
      }

      if(es->is_unicode)
      {
          if(es->hloc32A)
          {
            LocalFree(es->hloc32A);
            es->hloc32A = NULL;
          }
          es->hloc32W = hloc;
      }
      else
      {
          INT countW, countA;
          HLOCAL hloc32W_new;
          WCHAR *textW;
          CHAR *textA;

          countA = LocalSize(hloc);
          textA = LocalLock(hloc);
          countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
          if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
          {
            ERR("Could not allocate new unicode buffer\n");
            return;
          }
          textW = LocalLock(hloc32W_new);
          MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
          LocalUnlock(hloc32W_new);
          LocalUnlock(hloc);

          if(es->hloc32W)
            LocalFree(es->hloc32W);

          es->hloc32W = hloc32W_new;
          es->hloc32A = hloc;
      }

      es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;

        es->flags |= EF_APP_HAS_HANDLE;
      EDIT_LockBuffer(es);

      es->x_offset = es->y_offset = 0;
      es->selection_start = es->selection_end = 0;
      EDIT_EM_EmptyUndoBuffer(es);
      es->flags &= ~EF_MODIFIED;
      es->flags &= ~EF_UPDATE;
      EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
      EDIT_UpdateText(es, NULL, TRUE);
      EDIT_EM_ScrollCaret(es);
      /* force scroll info update */
      EDIT_UpdateScrollInfo(es);
}


/*********************************************************************
 *
 *    EM_SETHANDLE16
 *
 *    FIXME:      ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
 *
 */
static void EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc)
{
      STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
      HINSTANCE16 hInstance = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
      HANDLE16 oldDS = stack16->ds;
      INT countW, countA;
      HLOCAL hloc32W_new;
      WCHAR *textW;
      CHAR *textA;

      if (!(es->style & ES_MULTILINE))
            return;

      if (!hloc) {
            WARN("called with NULL handle\n");
            return;
      }

      EDIT_UnlockBuffer(es, TRUE);

      if(es->hloc32A)
      {
          LocalFree(es->hloc32A);
          es->hloc32A = NULL;
      }

      stack16->ds = hInstance;
      countA = LocalSize16(hloc);
      textA = MapSL(LocalLock16(hloc));
      countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
      if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
      {
          ERR("Could not allocate new unicode buffer\n");
          return;
      }
      textW = LocalLock(hloc32W_new);
      MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
      LocalUnlock(hloc32W_new);
      LocalUnlock16(hloc);
      stack16->ds = oldDS;

      if(es->hloc32W)
          LocalFree(es->hloc32W);

      es->hloc32W = hloc32W_new;
      es->hloc16 = hloc;

      es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;

        es->flags |= EF_APP_HAS_HANDLE;
      EDIT_LockBuffer(es);

      es->x_offset = es->y_offset = 0;
      es->selection_start = es->selection_end = 0;
      EDIT_EM_EmptyUndoBuffer(es);
      es->flags &= ~EF_MODIFIED;
      es->flags &= ~EF_UPDATE;
      EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
      EDIT_UpdateText(es, NULL, TRUE);
      EDIT_EM_ScrollCaret(es);
      /* force scroll info update */
      EDIT_UpdateScrollInfo(es);
}


/*********************************************************************
 *
 *    EM_SETLIMITTEXT
 *
 *    NOTE: this version currently implements WinNT limits
 *
 */
static void EDIT_EM_SetLimitText(EDITSTATE *es, UINT limit)
{
    if (!limit) limit = ~0u;
    if (!(es->style & ES_MULTILINE)) limit = min(limit, 0x7ffffffe);
    es->buffer_limit = limit;
}


/*********************************************************************
 *
 *    EM_SETMARGINS
 *
 * EC_USEFONTINFO is used as a left or right value i.e. lParam and not as an
 * action wParam despite what the docs say. EC_USEFONTINFO calculates the
 * margin according to the textmetrics of the current font.
 *
 * FIXME - With TrueType or vector fonts EC_USEFONTINFO currently sets one third
 * of the char's width as the margin, but this is not how Windows handles this.
 * For all other fonts Windows sets the margins to zero.
 *
 * FIXME - When EC_USEFONTINFO is used the margins only change if the
 * edit control is equal to or larger than a certain size.
 * Interestingly if one subtracts both the left and right margins from
 * this size one always seems to get an even number.  The extents of
 * the (four character) string "'**'" match this quite closely, so
 * we'll use this until we come up with a better idea.
 */
static int calc_min_set_margin_size(HDC dc, INT left, INT right)
{
    WCHAR magic_string[] = {'\'','*','*','\'', 0};
    SIZE sz;

    GetTextExtentPointW(dc, magic_string, sizeof(magic_string)/sizeof(WCHAR) - 1, &sz);
    return sz.cx + left + right;
}

static void EDIT_EM_SetMargins(EDITSTATE *es, INT action,
                         WORD left, WORD right, BOOL repaint)
{
      TEXTMETRICW tm;
      INT default_left_margin  = 0; /* in pixels */
      INT default_right_margin = 0; /* in pixels */

        /* Set the default margins depending on the font */
        if (es->font && (left == EC_USEFONTINFO || right == EC_USEFONTINFO)) {
            HDC dc = GetDC(es->hwndSelf);
            HFONT old_font = SelectObject(dc, es->font);
            GetTextMetricsW(dc, &tm);
            /* The default margins are only non zero for TrueType or Vector fonts */
            if (tm.tmPitchAndFamily & ( TMPF_VECTOR | TMPF_TRUETYPE )) {
                int min_size;
                RECT rc;
                /* This must be calculated more exactly! But how? */
                default_left_margin = tm.tmAveCharWidth / 2;
                default_right_margin = tm.tmAveCharWidth / 2;
                min_size = calc_min_set_margin_size(dc, default_left_margin, default_right_margin);
                GetClientRect(es->hwndSelf, &rc);
                if(rc.right - rc.left < min_size) {
                    default_left_margin = es->left_margin;
                    default_right_margin = es->right_margin;
                }
            }
            SelectObject(dc, old_font);
            ReleaseDC(es->hwndSelf, dc);
        }

      if (action & EC_LEFTMARGIN) {
            es->format_rect.left -= es->left_margin;
            if (left != EC_USEFONTINFO)
                  es->left_margin = left;
            else
                  es->left_margin = default_left_margin;
            es->format_rect.left += es->left_margin;
      }

      if (action & EC_RIGHTMARGIN) {
            es->format_rect.right += es->right_margin;
            if (right != EC_USEFONTINFO)
                  es->right_margin = right;
            else
                  es->right_margin = default_right_margin;
            es->format_rect.right -= es->right_margin;
      }
      
      if (action & (EC_LEFTMARGIN | EC_RIGHTMARGIN)) {
            EDIT_AdjustFormatRect(es);
            if (repaint) EDIT_UpdateText(es, NULL, TRUE);
      }
      
      TRACE("left=%d, right=%d\n", es->left_margin, es->right_margin);
}


/*********************************************************************
 *
 *    EM_SETPASSWORDCHAR
 *
 */
static void EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c)
{
      LONG style;

      if (es->style & ES_MULTILINE)
            return;

      if (es->password_char == c)
            return;

        style = GetWindowLongW( es->hwndSelf, GWL_STYLE );
      es->password_char = c;
      if (c) {
            SetWindowLongW( es->hwndSelf, GWL_STYLE, style | ES_PASSWORD );
            es->style |= ES_PASSWORD;
      } else {
            SetWindowLongW( es->hwndSelf, GWL_STYLE, style & ~ES_PASSWORD );
            es->style &= ~ES_PASSWORD;
      }
      EDIT_UpdateText(es, NULL, TRUE);
}


/*********************************************************************
 *
 *    EM_SETTABSTOPS
 *
 */
static BOOL EDIT_EM_SetTabStops(EDITSTATE *es, INT count, const INT *tabs)
{
      if (!(es->style & ES_MULTILINE))
            return FALSE;
        HeapFree(GetProcessHeap(), 0, es->tabs);
      es->tabs_count = count;
      if (!count)
            es->tabs = NULL;
      else {
            es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
            memcpy(es->tabs, tabs, count * sizeof(INT));
      }
      return TRUE;
}


/*********************************************************************
 *
 *    EM_SETTABSTOPS16
 *
 */
static BOOL EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, const INT16 *tabs)
{
      if (!(es->style & ES_MULTILINE))
            return FALSE;
        HeapFree(GetProcessHeap(), 0, es->tabs);
      es->tabs_count = count;
      if (!count)
            es->tabs = NULL;
      else {
            INT i;
            es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
            for (i = 0 ; i < count ; i++)
                  es->tabs[i] = *tabs++;
      }
      return TRUE;
}


/*********************************************************************
 *
 *    EM_SETWORDBREAKPROC
 *
 */
static void EDIT_EM_SetWordBreakProc(EDITSTATE *es, void *wbp)
{
      if (es->word_break_proc == wbp)
            return;

      es->word_break_proc = wbp;
      es->word_break_proc16 = NULL;

      if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
            EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
            EDIT_UpdateText(es, NULL, TRUE);
      }
}


/*********************************************************************
 *
 *    EM_SETWORDBREAKPROC16
 *
 */
static void EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp)
{
      if (es->word_break_proc16 == wbp)
            return;

      es->word_break_proc = NULL;
      es->word_break_proc16 = wbp;
      if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
            EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
            EDIT_UpdateText(es, NULL, TRUE);
      }
}


/*********************************************************************
 *
 *    EM_UNDO / WM_UNDO
 *
 */
static BOOL EDIT_EM_Undo(EDITSTATE *es)
{
      INT ulength;
      LPWSTR utext;

      /* As per MSDN spec, for a single-line edit control,
         the return value is always TRUE */
      if( es->style & ES_READONLY )
            return !(es->style & ES_MULTILINE);

      ulength = strlenW(es->undo_text);

      utext = HeapAlloc(GetProcessHeap(), 0, (ulength + 1) * sizeof(WCHAR));

      strcpyW(utext, es->undo_text);

      TRACE("before UNDO:insertion length = %d, deletion buffer = %s\n",
                 es->undo_insert_count, debugstr_w(utext));

      EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
      EDIT_EM_EmptyUndoBuffer(es);
      EDIT_EM_ReplaceSel(es, TRUE, utext, TRUE, TRUE);
      EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
        /* send the notification after the selection start and end are set */
        EDIT_NOTIFY_PARENT(es, EN_CHANGE);
      EDIT_EM_ScrollCaret(es);
      HeapFree(GetProcessHeap(), 0, utext);

      TRACE("after UNDO:insertion length = %d, deletion buffer = %s\n",
                  es->undo_insert_count, debugstr_w(es->undo_text));
      return TRUE;
}


/* Helper function for WM_CHAR
 *
 * According to an MSDN blog article titled "Just because you're a control
 * doesn't mean that you're necessarily inside a dialog box," multiline edit
 * controls without ES_WANTRETURN would attempt to detect whether it is inside
 * a dialog box or not.
 */
static inline BOOL EDIT_IsInsideDialog(EDITSTATE *es)
{
    return (es->flags & EF_DIALOGMODE);
}


/*********************************************************************
 *
 *    WM_PASTE
 *
 */
static void EDIT_WM_Paste(EDITSTATE *es)
{
      HGLOBAL hsrc;
      LPWSTR src;

      /* Protect read-only edit control from modification */
      if(es->style & ES_READONLY)
          return;

      OpenClipboard(es->hwndSelf);
      if ((hsrc = GetClipboardData(CF_UNICODETEXT))) {
            src = GlobalLock(hsrc);
            EDIT_EM_ReplaceSel(es, TRUE, src, TRUE, TRUE);
            GlobalUnlock(hsrc);
      }
        else if (es->style & ES_PASSWORD) {
            /* clear selected text in password edit box even with empty clipboard */
            const WCHAR empty_strW[] = { 0 };
            EDIT_EM_ReplaceSel(es, TRUE, empty_strW, TRUE, TRUE);
        }
      CloseClipboard();
}


/*********************************************************************
 *
 *    WM_COPY
 *
 */
static void EDIT_WM_Copy(EDITSTATE *es)
{
      INT s = min(es->selection_start, es->selection_end);
      INT e = max(es->selection_start, es->selection_end);
      HGLOBAL hdst;
      LPWSTR dst;
      DWORD len;

      if (e == s) return;

      len = e - s;
      hdst = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, (len + 1) * sizeof(WCHAR));
      dst = GlobalLock(hdst);
      memcpy(dst, es->text + s, len * sizeof(WCHAR));
      dst[len] = 0; /* ensure 0 termination */
      TRACE("%s\n", debugstr_w(dst));
      GlobalUnlock(hdst);
      OpenClipboard(es->hwndSelf);
      EmptyClipboard();
      SetClipboardData(CF_UNICODETEXT, hdst);
      CloseClipboard();
}


/*********************************************************************
 *
 *    WM_CLEAR
 *
 */
static inline void EDIT_WM_Clear(EDITSTATE *es)
{
      static const WCHAR empty_stringW[] = {0};

      /* Protect read-only edit control from modification */
      if(es->style & ES_READONLY)
          return;

      EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
}


/*********************************************************************
 *
 *    WM_CUT
 *
 */
static inline void EDIT_WM_Cut(EDITSTATE *es)
{
      EDIT_WM_Copy(es);
      EDIT_WM_Clear(es);
}


/*********************************************************************
 *
 *    WM_CHAR
 *
 */
static LRESULT EDIT_WM_Char(EDITSTATE *es, WCHAR c)
{
        BOOL control;

      control = GetKeyState(VK_CONTROL) & 0x8000;

      switch (c) {
      case '\r':
            /* If it's not a multiline edit box, it would be ignored below.
             * For multiline edit without ES_WANTRETURN, we have to make a
             * special case.
             */
            if ((es->style & ES_MULTILINE) && !(es->style & ES_WANTRETURN))
                if (EDIT_IsInsideDialog(es))
                    break;
      case '\n':
            if (es->style & ES_MULTILINE) {
                  if (es->style & ES_READONLY) {
                        EDIT_MoveHome(es, FALSE, FALSE);
                        EDIT_MoveDown_ML(es, FALSE);
                  } else {
                        static const WCHAR cr_lfW[] = {'\r','\n',0};
                        EDIT_EM_ReplaceSel(es, TRUE, cr_lfW, TRUE, TRUE);
                  }
            }
            break;
      case '\t':
            if ((es->style & ES_MULTILINE) && !(es->style & ES_READONLY))
            {
                  static const WCHAR tabW[] = {'\t',0};
                        if (EDIT_IsInsideDialog(es))
                            break;
                  EDIT_EM_ReplaceSel(es, TRUE, tabW, TRUE, TRUE);
            }
            break;
      case VK_BACK:
            if (!(es->style & ES_READONLY) && !control) {
                  if (es->selection_start != es->selection_end)
                        EDIT_WM_Clear(es);
                  else {
                        /* delete character left of caret */
                        EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
                        EDIT_MoveBackward(es, TRUE);
                        EDIT_WM_Clear(es);
                  }
            }
            break;
      case 0x03: /* ^C */
            if (!(es->style & ES_PASSWORD))
                SendMessageW(es->hwndSelf, WM_COPY, 0, 0);
            break;
      case 0x16: /* ^V */
              if (!(es->style & ES_READONLY))
                SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
            break;
      case 0x18: /* ^X */
              if (!((es->style & ES_READONLY) || (es->style & ES_PASSWORD)))
                SendMessageW(es->hwndSelf, WM_CUT, 0, 0);
            break;
      case 0x1A: /* ^Z */
              if (!(es->style & ES_READONLY))
                SendMessageW(es->hwndSelf, WM_UNDO, 0, 0);
            break;

      default:
            /*If Edit control style is ES_NUMBER allow users to key in only numeric values*/
            if( (es->style & ES_NUMBER) && !( c >= '0' && c <= '9') )
                  break;
                  
            if (!(es->style & ES_READONLY) && (c >= ' ') && (c != 127)) {
                  WCHAR str[2];
                  str[0] = c;
                  str[1] = '\0';
                  EDIT_EM_ReplaceSel(es, TRUE, str, TRUE, TRUE);
            }
            break;
      }
    return 1;
}


/*********************************************************************
 *
 *    WM_COMMAND
 *
 */
static void EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND control)
{
      if (code || control)
            return;

      switch (id) {
            case EM_UNDO:
                        SendMessageW(es->hwndSelf, WM_UNDO, 0, 0);
                  break;
            case WM_CUT:
                        SendMessageW(es->hwndSelf, WM_CUT, 0, 0);
                  break;
            case WM_COPY:
                        SendMessageW(es->hwndSelf, WM_COPY, 0, 0);
                  break;
            case WM_PASTE:
                        SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
                  break;
            case WM_CLEAR:
                        SendMessageW(es->hwndSelf, WM_CLEAR, 0, 0);
                  break;
            case EM_SETSEL:
                  EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
                  EDIT_EM_ScrollCaret(es);
                  break;
            default:
                  ERR("unknown menu item, please report\n");
                  break;
      }
}


/*********************************************************************
 *
 *    WM_CONTEXTMENU
 *
 *    Note: the resource files resource/sysres_??.rc cannot define a
 *          single popup menu.  Hence we use a (dummy) menubar
 *          containing the single popup menu as its first item.
 *
 *    FIXME: the message identifiers have been chosen arbitrarily,
 *          hence we use MF_BYPOSITION.
 *          We might as well use the "real" values (anybody knows ?)
 *          The menu definition is in resources/sysres_??.rc.
 *          Once these are OK, we better use MF_BYCOMMAND here
 *          (as we do in EDIT_WM_Command()).
 *
 */
static void EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y)
{
      HMENU menu = LoadMenuA(user32_module, "EDITMENU");
      HMENU popup = GetSubMenu(menu, 0);
      UINT start = es->selection_start;
      UINT end = es->selection_end;

      ORDER_UINT(start, end);

      /* undo */
      EnableMenuItem(popup, 0, MF_BYPOSITION | (EDIT_EM_CanUndo(es) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
      /* cut */
      EnableMenuItem(popup, 2, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
      /* copy */
      EnableMenuItem(popup, 3, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) ? MF_ENABLED : MF_GRAYED));
      /* paste */
      EnableMenuItem(popup, 4, MF_BYPOSITION | (IsClipboardFormatAvailable(CF_UNICODETEXT) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
      /* delete */
      EnableMenuItem(popup, 5, MF_BYPOSITION | ((end - start) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
      /* select all */
      EnableMenuItem(popup, 7, MF_BYPOSITION | (start || (end != get_text_length(es)) ? MF_ENABLED : MF_GRAYED));

        if (x == -1 && y == -1) /* passed via VK_APPS press/release */
        {
            RECT rc;
            /* Windows places the menu at the edit's center in this case */
            GetClientRect(es->hwndSelf, &rc);
            MapWindowPoints(es->hwndSelf, 0, (POINT *)&rc, 2);
            x = rc.left + (rc.right - rc.left) / 2;
            y = rc.top + (rc.bottom - rc.top) / 2;
        }

      TrackPopupMenu(popup, TPM_LEFTALIGN | TPM_RIGHTBUTTON, x, y, 0, es->hwndSelf, NULL);
      DestroyMenu(menu);
}


/*********************************************************************
 *
 *    WM_GETTEXT
 *
 */
static INT EDIT_WM_GetText(const EDITSTATE *es, INT count, LPWSTR dst, BOOL unicode)
{
    if(!count) return 0;

    if(unicode)
    {
      lstrcpynW(dst, es->text, count);
      return strlenW(dst);
    }
    else
    {
      LPSTR textA = (LPSTR)dst;
      if (!WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, count, NULL, NULL))
            textA[count - 1] = 0; /* ensure 0 termination */
      return strlen(textA);
    }
}

/*********************************************************************
 *
 *    EDIT_CheckCombo
 *
 */
static BOOL EDIT_CheckCombo(EDITSTATE *es, UINT msg, INT key)
{
   HWND hLBox = es->hwndListBox;
   HWND hCombo;
   BOOL bDropped;
   int  nEUI;

   if (!hLBox)
      return FALSE;

   hCombo   = GetParent(es->hwndSelf);
   bDropped = TRUE;
   nEUI     = 0;

   TRACE_(combo)("[%p]: handling msg %x (%x)\n", es->hwndSelf, msg, key);

   if (key == VK_UP || key == VK_DOWN)
   {
      if (SendMessageW(hCombo, CB_GETEXTENDEDUI, 0, 0))
         nEUI = 1;

      if (msg == WM_KEYDOWN || nEUI)
          bDropped = (BOOL)SendMessageW(hCombo, CB_GETDROPPEDSTATE, 0, 0);
   }

   switch (msg)
   {
      case WM_KEYDOWN:
         if (!bDropped && nEUI && (key == VK_UP || key == VK_DOWN))
         {
            /* make sure ComboLBox pops up */
            SendMessageW(hCombo, CB_SETEXTENDEDUI, FALSE, 0);
            key = VK_F4;
            nEUI = 2;
         }

         SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)key, 0);
         break;

      case WM_SYSKEYDOWN: /* Handle Alt+up/down arrows */
         if (nEUI)
            SendMessageW(hCombo, CB_SHOWDROPDOWN, bDropped ? FALSE : TRUE, 0);
         else
            SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)VK_F4, 0);
         break;
   }

   if(nEUI == 2)
      SendMessageW(hCombo, CB_SETEXTENDEDUI, TRUE, 0);

   return TRUE;
}


/*********************************************************************
 *
 *    WM_KEYDOWN
 *
 *    Handling of special keys that don't produce a WM_CHAR
 *    (i.e. non-printable keys) & Backspace & Delete
 *
 */
static LRESULT EDIT_WM_KeyDown(EDITSTATE *es, INT key)
{
      BOOL shift;
      BOOL control;

      if (GetKeyState(VK_MENU) & 0x8000)
            return 0;

      shift = GetKeyState(VK_SHIFT) & 0x8000;
      control = GetKeyState(VK_CONTROL) & 0x8000;

      switch (key) {
      case VK_F4:
      case VK_UP:
            if (EDIT_CheckCombo(es, WM_KEYDOWN, key) || key == VK_F4)
                  break;

            /* fall through */
      case VK_LEFT:
            if ((es->style & ES_MULTILINE) && (key == VK_UP))
                  EDIT_MoveUp_ML(es, shift);
            else
                  if (control)
                        EDIT_MoveWordBackward(es, shift);
                  else
                        EDIT_MoveBackward(es, shift);
            break;
      case VK_DOWN:
            if (EDIT_CheckCombo(es, WM_KEYDOWN, key))
                  break;
            /* fall through */
      case VK_RIGHT:
            if ((es->style & ES_MULTILINE) && (key == VK_DOWN))
                  EDIT_MoveDown_ML(es, shift);
            else if (control)
                  EDIT_MoveWordForward(es, shift);
            else
                  EDIT_MoveForward(es, shift);
            break;
      case VK_HOME:
            EDIT_MoveHome(es, shift, control);
            break;
      case VK_END:
            EDIT_MoveEnd(es, shift, control);
            break;
      case VK_PRIOR:
            if (es->style & ES_MULTILINE)
                  EDIT_MovePageUp_ML(es, shift);
            else
                  EDIT_CheckCombo(es, WM_KEYDOWN, key);
            break;
      case VK_NEXT:
            if (es->style & ES_MULTILINE)
                  EDIT_MovePageDown_ML(es, shift);
            else
                  EDIT_CheckCombo(es, WM_KEYDOWN, key);
            break;
      case VK_DELETE:
            if (!(es->style & ES_READONLY) && !(shift && control)) {
                  if (es->selection_start != es->selection_end) {
                        if (shift)
                              EDIT_WM_Cut(es);
                        else
                              EDIT_WM_Clear(es);
                  } else {
                        if (shift) {
                              /* delete character left of caret */
                              EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
                              EDIT_MoveBackward(es, TRUE);
                              EDIT_WM_Clear(es);
                        } else if (control) {
                              /* delete to end of line */
                              EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
                              EDIT_MoveEnd(es, TRUE, FALSE);
                              EDIT_WM_Clear(es);
                        } else {
                              /* delete character right of caret */
                              EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
                              EDIT_MoveForward(es, TRUE);
                              EDIT_WM_Clear(es);
                        }
                  }
            }
            break;
      case VK_INSERT:
            if (shift) {
                  if (!(es->style & ES_READONLY))
                        EDIT_WM_Paste(es);
            } else if (control)
                  EDIT_WM_Copy(es);
            break;
      case VK_RETURN:
          /* If the edit doesn't want the return send a message to the default object */
          if(!(es->style & ES_MULTILINE) || !(es->style & ES_WANTRETURN))
          {
                DWORD dw;

                if (!EDIT_IsInsideDialog(es)) break;
                if (control) break;
                dw = SendMessageW(es->hwndParent, DM_GETDEFID, 0, 0);
                if (HIWORD(dw) == DC_HASDEFID)
                {
                    HWND hwDefCtrl = GetDlgItem(es->hwndParent, LOWORD(dw));
                    if (hwDefCtrl)
                    {
                        SendMessageW(es->hwndParent, WM_NEXTDLGCTL, (WPARAM)hwDefCtrl, (LPARAM)TRUE);
                        PostMessageW(hwDefCtrl, WM_KEYDOWN, VK_RETURN, 0);
                    }
                }
          }
          break;
        case VK_ESCAPE:
            if ((es->style & ES_MULTILINE) && EDIT_IsInsideDialog(es))
                PostMessageW(es->hwndParent, WM_CLOSE, 0, 0);
            break;
        case VK_TAB:
            if ((es->style & ES_MULTILINE) && EDIT_IsInsideDialog(es))
                SendMessageW(es->hwndParent, WM_NEXTDLGCTL, shift, 0);
            break;
      }
        return TRUE;
}


/*********************************************************************
 *
 *    WM_KILLFOCUS
 *
 */
static LRESULT EDIT_WM_KillFocus(EDITSTATE *es)
{
      es->flags &= ~EF_FOCUSED;
      DestroyCaret();
      if(!(es->style & ES_NOHIDESEL))
            EDIT_InvalidateText(es, es->selection_start, es->selection_end);
      EDIT_NOTIFY_PARENT(es, EN_KILLFOCUS);
      return 0;
}


/*********************************************************************
 *
 *    WM_LBUTTONDBLCLK
 *
 *    The caret position has been set on the WM_LBUTTONDOWN message
 *
 */
static LRESULT EDIT_WM_LButtonDblClk(EDITSTATE *es)
{
      INT s;
      INT e = es->selection_end;
      INT l;
      INT li;
      INT ll;

      es->bCaptureState = TRUE;
      SetCapture(es->hwndSelf);

      l = EDIT_EM_LineFromChar(es, e);
      li = EDIT_EM_LineIndex(es, l);
      ll = EDIT_EM_LineLength(es, e);
      s = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_LEFT);
      e = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_RIGHT);
      EDIT_EM_SetSel(es, s, e, FALSE);
      EDIT_EM_ScrollCaret(es);
      es->region_posx = es->region_posy = 0;
      SetTimer(es->hwndSelf, 0, 100, NULL);
      return 0;
}


/*********************************************************************
 *
 *    WM_LBUTTONDOWN
 *
 */
static LRESULT EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y)
{
      INT e;
      BOOL after_wrap;

      es->bCaptureState = TRUE;
      SetCapture(es->hwndSelf);
      EDIT_ConfinePoint(es, &x, &y);
      e = EDIT_CharFromPos(es, x, y, &after_wrap);
      EDIT_EM_SetSel(es, (keys & MK_SHIFT) ? es->selection_start : e, e, after_wrap);
      EDIT_EM_ScrollCaret(es);
      es->region_posx = es->region_posy = 0;
      SetTimer(es->hwndSelf, 0, 100, NULL);

      if (!(es->flags & EF_FOCUSED))
            SetFocus(es->hwndSelf);

      return 0;
}


/*********************************************************************
 *
 *    WM_LBUTTONUP
 *
 */
static LRESULT EDIT_WM_LButtonUp(EDITSTATE *es)
{
      if (es->bCaptureState) {
            KillTimer(es->hwndSelf, 0);
            if (GetCapture() == es->hwndSelf) ReleaseCapture();
      }
      es->bCaptureState = FALSE;
      return 0;
}


/*********************************************************************
 *
 *    WM_MBUTTONDOWN
 *
 */
static LRESULT EDIT_WM_MButtonDown(EDITSTATE *es)
{
    SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
    return 0;
}


/*********************************************************************
 *
 *    WM_MOUSEMOVE
 *
 */
static LRESULT EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y)
{
      INT e;
      BOOL after_wrap;
      INT prex, prey;

        /* If the mouse has been captured by process other than the edit control itself,
         * the windows edit controls will not select the strings with mouse move.
         */
        if (!es->bCaptureState || GetCapture() != es->hwndSelf)
            return 0;

      /*
       *    FIXME: gotta do some scrolling if outside client
       *          area.  Maybe reset the timer ?
       */
      prex = x; prey = y;
      EDIT_ConfinePoint(es, &x, &y);
      es->region_posx = (prex < x) ? -1 : ((prex > x) ? 1 : 0);
      es->region_posy = (prey < y) ? -1 : ((prey > y) ? 1 : 0);
      e = EDIT_CharFromPos(es, x, y, &after_wrap);
      EDIT_EM_SetSel(es, es->selection_start, e, after_wrap);
      EDIT_SetCaretPos(es,es->selection_end,es->flags & EF_AFTER_WRAP);
      return 0;
}


/*********************************************************************
 *
 *    WM_PAINT
 *
 */
static void EDIT_WM_Paint(EDITSTATE *es, HDC hdc)
{
      PAINTSTRUCT ps;
      INT i;
      HDC dc;
      HFONT old_font = 0;
      RECT rc;
      RECT rcClient;
      RECT rcLine;
      RECT rcRgn;
      HBRUSH brush;
      HBRUSH old_brush;
      INT bw, bh;
      BOOL rev = es->bEnableState &&
                        ((es->flags & EF_FOCUSED) ||
                              (es->style & ES_NOHIDESEL));
        dc = hdc ? hdc : BeginPaint(es->hwndSelf, &ps);

      GetClientRect(es->hwndSelf, &rcClient);

      /* get the background brush */
      brush = EDIT_NotifyCtlColor(es, dc);

      /* paint the border and the background */
      IntersectClipRect(dc, rcClient.left, rcClient.top, rcClient.right, rcClient.bottom);
      
      if(es->style & WS_BORDER) {
            bw = GetSystemMetrics(SM_CXBORDER);
            bh = GetSystemMetrics(SM_CYBORDER);
            rc = rcClient;
            if(es->style & ES_MULTILINE) {
                  if(es->style & WS_HSCROLL) rc.bottom+=bh;
                  if(es->style & WS_VSCROLL) rc.right+=bw;
            }
            
            /* Draw the frame. Same code as in nonclient.c */
            old_brush = SelectObject(dc, GetSysColorBrush(COLOR_WINDOWFRAME));
            PatBlt(dc, rc.left, rc.top, rc.right - rc.left, bh, PATCOPY);
            PatBlt(dc, rc.left, rc.top, bw, rc.bottom - rc.top, PATCOPY);
            PatBlt(dc, rc.left, rc.bottom - 1, rc.right - rc.left, -bw, PATCOPY);
            PatBlt(dc, rc.right - 1, rc.top, -bw, rc.bottom - rc.top, PATCOPY);
            SelectObject(dc, old_brush);
            
            /* Keep the border clean */
            IntersectClipRect(dc, rc.left+bw, rc.top+bh,
                max(rc.right-bw, rc.left+bw), max(rc.bottom-bh, rc.top+bh));
      }
      
      GetClipBox(dc, &rc);
      FillRect(dc, &rc, brush);

      IntersectClipRect(dc, es->format_rect.left,
                        es->format_rect.top,
                        es->format_rect.right,
                        es->format_rect.bottom);
      if (es->style & ES_MULTILINE) {
            rc = rcClient;
            IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
      }
      if (es->font)
            old_font = SelectObject(dc, es->font);

      if (!es->bEnableState)
            SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT));
      GetClipBox(dc, &rcRgn);
      if (es->style & ES_MULTILINE) {
            INT vlc = get_vertical_line_count(es);
            for (i = es->y_offset ; i <= min(es->y_offset + vlc, es->y_offset + es->line_count - 1) ; i++) {
                  EDIT_GetLineRect(es, i, 0, -1, &rcLine);
                  if (IntersectRect(&rc, &rcRgn, &rcLine))
                        EDIT_PaintLine(es, dc, i, rev);
            }
      } else {
            EDIT_GetLineRect(es, 0, 0, -1, &rcLine);
            if (IntersectRect(&rc, &rcRgn, &rcLine))
                  EDIT_PaintLine(es, dc, 0, rev);
      }
      if (es->font)
            SelectObject(dc, old_font);

        if (!hdc)
            EndPaint(es->hwndSelf, &ps);
}


/*********************************************************************
 *
 *    WM_SETFOCUS
 *
 */
static void EDIT_WM_SetFocus(EDITSTATE *es)
{
      es->flags |= EF_FOCUSED;

        if (!(es->style & ES_NOHIDESEL))
            EDIT_InvalidateText(es, es->selection_start, es->selection_end);

        /* single line edit updates itself */
        if (!(es->style & ES_MULTILINE))
        {
            HDC hdc = GetDC(es->hwndSelf);
            EDIT_WM_Paint(es, hdc);
            ReleaseDC(es->hwndSelf, hdc);
        }

      CreateCaret(es->hwndSelf, 0, 1, es->line_height);
      EDIT_SetCaretPos(es, es->selection_end,
                   es->flags & EF_AFTER_WRAP);
      ShowCaret(es->hwndSelf);
      EDIT_NOTIFY_PARENT(es, EN_SETFOCUS);
}


/*********************************************************************
 *
 *    WM_SETFONT
 *
 * With Win95 look the margins are set to default font value unless
 * the system font (font == 0) is being set, in which case they are left
 * unchanged.
 *
 */
static void EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw)
{
      TEXTMETRICW tm;
      HDC dc;
      HFONT old_font = 0;
      RECT clientRect;

      es->font = font;
      dc = GetDC(es->hwndSelf);
      if (font)
            old_font = SelectObject(dc, font);
      GetTextMetricsW(dc, &tm);
      es->line_height = tm.tmHeight;
      es->char_width = tm.tmAveCharWidth;
      if (font)
            SelectObject(dc, old_font);
      ReleaseDC(es->hwndSelf, dc);
      
      /* Reset the format rect and the margins */
      GetClientRect(es->hwndSelf, &clientRect);
      EDIT_SetRectNP(es, &clientRect);
      EDIT_EM_SetMargins(es, EC_LEFTMARGIN | EC_RIGHTMARGIN,
                     EC_USEFONTINFO, EC_USEFONTINFO, FALSE);

      if (es->style & ES_MULTILINE)
            EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
      else
          EDIT_CalcLineWidth_SL(es);

      if (redraw)
            EDIT_UpdateText(es, NULL, TRUE);
      if (es->flags & EF_FOCUSED) {
            DestroyCaret();
            CreateCaret(es->hwndSelf, 0, 1, es->line_height);
            EDIT_SetCaretPos(es, es->selection_end,
                         es->flags & EF_AFTER_WRAP);
            ShowCaret(es->hwndSelf);
      }
}


/*********************************************************************
 *
 *    WM_SETTEXT
 *
 * NOTES
 *  For multiline controls (ES_MULTILINE), reception of WM_SETTEXT triggers:
 *  The modified flag is reset. No notifications are sent.
 *
 *  For single-line controls, reception of WM_SETTEXT triggers:
 *  The modified flag is reset. EN_UPDATE and EN_CHANGE notifications are sent.
 *
 */
static void EDIT_WM_SetText(EDITSTATE *es, LPCWSTR text, BOOL unicode)
{
    LPWSTR textW = NULL;
    if (!unicode && text)
    {
      LPCSTR textA = (LPCSTR)text;
      INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
        textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR));
      if (textW)
          MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
      text = textW;
    }

    if (es->flags & EF_UPDATE)
      /* fixed this bug once; complain if we see it about to happen again. */
      ERR("SetSel may generate UPDATE message whose handler may reset "
          "selection.\n");

    EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
    if (text) 
    {
      TRACE("%s\n", debugstr_w(text));
      EDIT_EM_ReplaceSel(es, FALSE, text, FALSE, FALSE);
      if(!unicode)
          HeapFree(GetProcessHeap(), 0, textW);
    } 
    else 
    {
      static const WCHAR empty_stringW[] = {0};
      TRACE("<NULL>\n");
      EDIT_EM_ReplaceSel(es, FALSE, empty_stringW, FALSE, FALSE);
    }
    es->x_offset = 0;
    es->flags &= ~EF_MODIFIED;
    EDIT_EM_SetSel(es, 0, 0, FALSE);

    /* Send the notification after the selection start and end have been set
     * edit control doesn't send notification on WM_SETTEXT
     * if it is multiline, or it is part of combobox
     */
    if( !((es->style & ES_MULTILINE) || es->hwndListBox))
    {
        EDIT_NOTIFY_PARENT(es, EN_UPDATE);
        EDIT_NOTIFY_PARENT(es, EN_CHANGE);
    }
    EDIT_EM_ScrollCaret(es);
    EDIT_UpdateScrollInfo(es);    
}


/*********************************************************************
 *
 *    WM_SIZE
 *
 */
static void EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height)
{
      if ((action == SIZE_MAXIMIZED) || (action == SIZE_RESTORED)) {
            RECT rc;
            TRACE("width = %d, height = %d\n", width, height);
            SetRect(&rc, 0, 0, width, height);
            EDIT_SetRectNP(es, &rc);
            EDIT_UpdateText(es, NULL, TRUE);
      }
}


/*********************************************************************
 *
 *    WM_STYLECHANGED
 *
 * This message is sent by SetWindowLong on having changed either the Style
 * or the extended style.
 *
 * We ensure that the window's version of the styles and the EDITSTATE's agree.
 *
 * See also EDIT_WM_NCCreate
 *
 * It appears that the Windows version of the edit control allows the style
 * (as retrieved by GetWindowLong) to be any value and maintains an internal
 * style variable which will generally be different.  In this function we
 * update the internal style based on what changed in the externally visible
 * style.
 *
 * Much of this content as based upon the MSDN, especially:
 *  Platform SDK Documentation -> User Interface Services ->
 *      Windows User Interface -> Edit Controls -> Edit Control Reference ->
 *      Edit Control Styles
 */
static LRESULT  EDIT_WM_StyleChanged ( EDITSTATE *es, WPARAM which, const STYLESTRUCT *style)
{
        if (GWL_STYLE == which) {
                DWORD style_change_mask;
                DWORD new_style;
                /* Only a subset of changes can be applied after the control
                 * has been created.
                 */
                style_change_mask = ES_UPPERCASE | ES_LOWERCASE |
                                    ES_NUMBER;
                if (es->style & ES_MULTILINE)
                        style_change_mask |= ES_WANTRETURN;

                new_style = style->styleNew & style_change_mask;

                /* Number overrides lowercase overrides uppercase (at least it
                 * does in Win95).  However I'll bet that ES_NUMBER would be
                 * invalid under Win 3.1.
                 */
                if (new_style & ES_NUMBER) {
                        ; /* do not override the ES_NUMBER */
                }  else if (new_style & ES_LOWERCASE) {
                        new_style &= ~ES_UPPERCASE;
                }

                es->style = (es->style & ~style_change_mask) | new_style;
        } else if (GWL_EXSTYLE == which) {
                ; /* FIXME - what is needed here */
        } else {
                WARN ("Invalid style change %ld\n",which);
        }

        return 0;
}

/*********************************************************************
 *
 *    WM_SYSKEYDOWN
 *
 */
static LRESULT EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data)
{
      if ((key == VK_BACK) && (key_data & 0x2000)) {
            if (EDIT_EM_CanUndo(es))
                  EDIT_EM_Undo(es);
            return 0;
      } else if (key == VK_UP || key == VK_DOWN) {
            if (EDIT_CheckCombo(es, WM_SYSKEYDOWN, key))
                  return 0;
      }
      return DefWindowProcW(es->hwndSelf, WM_SYSKEYDOWN, (WPARAM)key, (LPARAM)key_data);
}


/*********************************************************************
 *
 *    WM_TIMER
 *
 */
static void EDIT_WM_Timer(EDITSTATE *es)
{
      if (es->region_posx < 0) {
            EDIT_MoveBackward(es, TRUE);
      } else if (es->region_posx > 0) {
            EDIT_MoveForward(es, TRUE);
      }
/*
 *    FIXME: gotta do some vertical scrolling here, like
 *          EDIT_EM_LineScroll(hwnd, 0, 1);
 */
}

/*********************************************************************
 *
 *    WM_HSCROLL
 *
 */
static LRESULT EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos)
{
      INT dx;
      INT fw;

      if (!(es->style & ES_MULTILINE))
            return 0;

      if (!(es->style & ES_AUTOHSCROLL))
            return 0;

      dx = 0;
      fw = es->format_rect.right - es->format_rect.left;
      switch (action) {
      case SB_LINELEFT:
            TRACE("SB_LINELEFT\n");
            if (es->x_offset)
                  dx = -es->char_width;
            break;
      case SB_LINERIGHT:
            TRACE("SB_LINERIGHT\n");
            if (es->x_offset < es->text_width)
                  dx = es->char_width;
            break;
      case SB_PAGELEFT:
            TRACE("SB_PAGELEFT\n");
            if (es->x_offset)
                  dx = -fw / HSCROLL_FRACTION / es->char_width * es->char_width;
            break;
      case SB_PAGERIGHT:
            TRACE("SB_PAGERIGHT\n");
            if (es->x_offset < es->text_width)
                  dx = fw / HSCROLL_FRACTION / es->char_width * es->char_width;
            break;
      case SB_LEFT:
            TRACE("SB_LEFT\n");
            if (es->x_offset)
                  dx = -es->x_offset;
            break;
      case SB_RIGHT:
            TRACE("SB_RIGHT\n");
            if (es->x_offset < es->text_width)
                  dx = es->text_width - es->x_offset;
            break;
      case SB_THUMBTRACK:
            TRACE("SB_THUMBTRACK %d\n", pos);
            es->flags |= EF_HSCROLL_TRACK;
            if(es->style & WS_HSCROLL)
                dx = pos - es->x_offset;
            else
            {
                INT fw, new_x;
                /* Sanity check */
                if(pos < 0 || pos > 100) return 0;
                /* Assume default scroll range 0-100 */
                fw = es->format_rect.right - es->format_rect.left;
                new_x = pos * (es->text_width - fw) / 100;
                dx = es->text_width ? (new_x - es->x_offset) : 0;
            }
            break;
      case SB_THUMBPOSITION:
            TRACE("SB_THUMBPOSITION %d\n", pos);
            es->flags &= ~EF_HSCROLL_TRACK;
            if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
                dx = pos - es->x_offset;
            else
            {
                INT fw, new_x;
                /* Sanity check */
                if(pos < 0 || pos > 100) return 0;
                /* Assume default scroll range 0-100 */
                fw = es->format_rect.right - es->format_rect.left;
                new_x = pos * (es->text_width - fw) / 100;
                dx = es->text_width ? (new_x - es->x_offset) : 0;
            }
            if (!dx) {
                  /* force scroll info update */
                  EDIT_UpdateScrollInfo(es);
                  EDIT_NOTIFY_PARENT(es, EN_HSCROLL);
            }
            break;
      case SB_ENDSCROLL:
            TRACE("SB_ENDSCROLL\n");
            break;
      /*
       *    FIXME : the next two are undocumented !
       *    Are we doing the right thing ?
       *    At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
       *    although it's also a regular control message.
       */
      case EM_GETTHUMB: /* this one is used by NT notepad */
      case EM_GETTHUMB16:
      {
            LRESULT ret;
            if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
                ret = GetScrollPos(es->hwndSelf, SB_HORZ);
            else
            {
                /* Assume default scroll range 0-100 */
                INT fw = es->format_rect.right - es->format_rect.left;
                ret = es->text_width ? es->x_offset * 100 / (es->text_width - fw) : 0;
            }
            TRACE("EM_GETTHUMB: returning %ld\n", ret);
            return ret;
      }
      case EM_LINESCROLL16:
            TRACE("EM_LINESCROLL16\n");
            dx = pos;
            break;

      default:
            ERR("undocumented WM_HSCROLL action %d (0x%04x), please report\n",
                    action, action);
            return 0;
      }
      if (dx)
      {
          INT fw = es->format_rect.right - es->format_rect.left;
          /* check if we are going to move too far */
          if(es->x_offset + dx + fw > es->text_width)
            dx = es->text_width - fw - es->x_offset;
          if(dx)
            EDIT_EM_LineScroll_internal(es, dx, 0);
      }
      return 0;
}


/*********************************************************************
 *
 *    WM_VSCROLL
 *
 */
static LRESULT EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos)
{
      INT dy;

      if (!(es->style & ES_MULTILINE))
            return 0;

      if (!(es->style & ES_AUTOVSCROLL))
            return 0;

      dy = 0;
      switch (action) {
      case SB_LINEUP:
      case SB_LINEDOWN:
      case SB_PAGEUP:
      case SB_PAGEDOWN:
            TRACE("action %d (%s)\n", action, (action == SB_LINEUP ? "SB_LINEUP" :
                                       (action == SB_LINEDOWN ? "SB_LINEDOWN" :
                                        (action == SB_PAGEUP ? "SB_PAGEUP" :
                                         "SB_PAGEDOWN"))));
            EDIT_EM_Scroll(es, action);
            return 0;
      case SB_TOP:
            TRACE("SB_TOP\n");
            dy = -es->y_offset;
            break;
      case SB_BOTTOM:
            TRACE("SB_BOTTOM\n");
            dy = es->line_count - 1 - es->y_offset;
            break;
      case SB_THUMBTRACK:
            TRACE("SB_THUMBTRACK %d\n", pos);
            es->flags |= EF_VSCROLL_TRACK;
            if(es->style & WS_VSCROLL)
                dy = pos - es->y_offset;
            else
            {
                /* Assume default scroll range 0-100 */
                INT vlc, new_y;
                /* Sanity check */
                if(pos < 0 || pos > 100) return 0;
                vlc = get_vertical_line_count(es);
                new_y = pos * (es->line_count - vlc) / 100;
                dy = es->line_count ? (new_y - es->y_offset) : 0;
                TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
                      es->line_count, es->y_offset, pos, dy);
            }
            break;
      case SB_THUMBPOSITION:
            TRACE("SB_THUMBPOSITION %d\n", pos);
            es->flags &= ~EF_VSCROLL_TRACK;
            if(es->style & WS_VSCROLL)
                dy = pos - es->y_offset;
            else
            {
                /* Assume default scroll range 0-100 */
                INT vlc, new_y;
                /* Sanity check */
                if(pos < 0 || pos > 100) return 0;
                vlc = get_vertical_line_count(es);
                new_y = pos * (es->line_count - vlc) / 100;
                dy = es->line_count ? (new_y - es->y_offset) : 0;
                TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
                      es->line_count, es->y_offset, pos, dy);
            }
            if (!dy)
            {
                  /* force scroll info update */
                  EDIT_UpdateScrollInfo(es);
                  EDIT_NOTIFY_PARENT(es, EN_VSCROLL);
            }
            break;
      case SB_ENDSCROLL:
            TRACE("SB_ENDSCROLL\n");
            break;
      /*
       *    FIXME : the next two are undocumented !
       *    Are we doing the right thing ?
       *    At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
       *    although it's also a regular control message.
       */
      case EM_GETTHUMB: /* this one is used by NT notepad */
      case EM_GETTHUMB16:
      {
            LRESULT ret;
            if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_VSCROLL)
                ret = GetScrollPos(es->hwndSelf, SB_VERT);
            else
            {
                /* Assume default scroll range 0-100 */
                INT vlc = get_vertical_line_count(es);
                ret = es->line_count ? es->y_offset * 100 / (es->line_count - vlc) : 0;
            }
            TRACE("EM_GETTHUMB: returning %ld\n", ret);
            return ret;
      }
      case EM_LINESCROLL16:
            TRACE("EM_LINESCROLL16 %d\n", pos);
            dy = pos;
            break;

      default:
            ERR("undocumented WM_VSCROLL action %d (0x%04x), please report\n",
                    action, action);
            return 0;
      }
      if (dy)
            EDIT_EM_LineScroll(es, 0, dy);
      return 0;
}

/*********************************************************************
 *
 *    EM_GETTHUMB
 *
 *    FIXME: is this right ?  (or should it be only VSCROLL)
 *    (and maybe only for edit controls that really have their
 *    own scrollbars) (and maybe only for multiline controls ?)
 *    All in all: very poorly documented
 *
 */
static LRESULT EDIT_EM_GetThumb(EDITSTATE *es)
{
      return MAKELONG(EDIT_WM_VScroll(es, EM_GETTHUMB16, 0),
            EDIT_WM_HScroll(es, EM_GETTHUMB16, 0));
}


/********************************************************************
 * 
 * The Following code is to handle inline editing from IMEs
 */

static void EDIT_GetCompositionStr(HIMC hIMC, LPARAM CompFlag, EDITSTATE *es)
{
    LONG buflen;
    LPWSTR lpCompStr = NULL;
    LPSTR lpCompStrAttr = NULL;
    DWORD dwBufLenAttr;

    buflen = ImmGetCompositionStringW(hIMC, GCS_COMPSTR, NULL, 0);

    if (buflen < 0)
    {
        return;
    }

    lpCompStr = HeapAlloc(GetProcessHeap(),0,buflen + sizeof(WCHAR));
    if (!lpCompStr)
    {
        ERR("Unable to allocate IME CompositionString\n");
        return;
    }

    if (buflen)
        ImmGetCompositionStringW(hIMC, GCS_COMPSTR, lpCompStr, buflen);
    lpCompStr[buflen/sizeof(WCHAR)] = 0;

    if (CompFlag & GCS_COMPATTR)
    {
        /* 
         * We do not use the attributes yet. it would tell us what characters
         * are in transition and which are converted or decided upon
         */
        dwBufLenAttr = ImmGetCompositionStringW(hIMC, GCS_COMPATTR, NULL, 0);
        if (dwBufLenAttr)
        {
            dwBufLenAttr ++;
            lpCompStrAttr = HeapAlloc(GetProcessHeap(),0,dwBufLenAttr+1);
            if (!lpCompStrAttr)
            {
                ERR("Unable to allocate IME Attribute String\n");
                HeapFree(GetProcessHeap(),0,lpCompStr);
                return;
            }
            ImmGetCompositionStringW(hIMC,GCS_COMPATTR, lpCompStrAttr, 
                    dwBufLenAttr);
            lpCompStrAttr[dwBufLenAttr] = 0;
        }
        else
            lpCompStrAttr = NULL;
    }

    /* check for change in composition start */
    if (es->selection_end < es->composition_start)
        es->composition_start = es->selection_end;
    
    /* replace existing selection string */
    es->selection_start = es->composition_start;

    if (es->composition_len > 0)
        es->selection_end = es->composition_start + es->composition_len;
    else
        es->selection_end = es->selection_start;

    EDIT_EM_ReplaceSel(es, FALSE, lpCompStr, TRUE, TRUE);
    es->composition_len = abs(es->composition_start - es->selection_end);

    es->selection_start = es->composition_start;
    es->selection_end = es->selection_start + es->composition_len;

    HeapFree(GetProcessHeap(),0,lpCompStrAttr);
    HeapFree(GetProcessHeap(),0,lpCompStr);
}

static void EDIT_GetResultStr(HIMC hIMC, EDITSTATE *es)
{
    LONG buflen;
    LPWSTR lpResultStr;

    buflen = ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, NULL, 0);
    if (buflen <= 0)
    {
        return;
    }

    lpResultStr = HeapAlloc(GetProcessHeap(),0, buflen+sizeof(WCHAR));
    if (!lpResultStr)
    {
        ERR("Unable to alloc buffer for IME string\n");
        return;
    }

    ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, lpResultStr, buflen);
    lpResultStr[buflen/sizeof(WCHAR)] = 0;

    /* check for change in composition start */
    if (es->selection_end < es->composition_start)
        es->composition_start = es->selection_end;

    es->selection_start = es->composition_start;
    es->selection_end = es->composition_start + es->composition_len;
    EDIT_EM_ReplaceSel(es, TRUE, lpResultStr, TRUE, TRUE);
    es->composition_start = es->selection_end;
    es->composition_len = 0;

    HeapFree(GetProcessHeap(),0,lpResultStr);
}

static void EDIT_ImeComposition(HWND hwnd, LPARAM CompFlag, EDITSTATE *es)
{
    HIMC hIMC;
    int cursor;

    if (es->composition_len == 0 && es->selection_start != es->selection_end)
    {
        static const WCHAR empty_stringW[] = {0};
        EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
        es->composition_start = es->selection_end;
    }

    hIMC = ImmGetContext(hwnd);
    if (!hIMC)
        return;

    if (CompFlag & GCS_RESULTSTR)
        EDIT_GetResultStr(hIMC, es);
    if (CompFlag & GCS_COMPSTR)
        EDIT_GetCompositionStr(hIMC, CompFlag, es);
    cursor = ImmGetCompositionStringW(hIMC, GCS_CURSORPOS, 0, 0);
    ImmReleaseContext(hwnd, hIMC);
    EDIT_SetCaretPos(es, es->selection_start + cursor, es->flags & EF_AFTER_WRAP);
}


/*********************************************************************
 *
 *    WM_NCCREATE
 *
 * See also EDIT_WM_StyleChanged
 */
static LRESULT EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode)
{
      EDITSTATE *es;
      UINT alloc_size;

      TRACE("Creating %s edit control, style = %08x\n",
            unicode ? "Unicode" : "ANSI", lpcs->style);

      if (!(es = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*es))))
            return FALSE;
        SetWindowLongPtrW( hwnd, 0, (LONG_PTR)es );

       /*
        *      Note: since the EDITSTATE has not been fully initialized yet,
        *            we can't use any API calls that may send
        *            WM_XXX messages before WM_NCCREATE is completed.
        */

      es->is_unicode = unicode;
      es->style = lpcs->style;

        es->bEnableState = !(es->style & WS_DISABLED);

      es->hwndSelf = hwnd;
      /* Save parent, which will be notified by EN_* messages */
      es->hwndParent = lpcs->hwndParent;

      if (es->style & ES_COMBO)
         es->hwndListBox = GetDlgItem(es->hwndParent, ID_CB_LISTBOX);

        /* FIXME: should we handle changes to WS_EX_RIGHT style after creation? */
        if (lpcs->dwExStyle & WS_EX_RIGHT) es->style |= ES_RIGHT;

        /* Number overrides lowercase overrides uppercase (at least it
         * does in Win95).  However I'll bet that ES_NUMBER would be
         * invalid under Win 3.1.
         */
        if (es->style & ES_NUMBER) {
                ; /* do not override the ES_NUMBER */
        }  else if (es->style & ES_LOWERCASE) {
                es->style &= ~ES_UPPERCASE;
        }
      if (es->style & ES_MULTILINE) {
            es->buffer_limit = BUFLIMIT_INITIAL;
            if (es->style & WS_VSCROLL)
                  es->style |= ES_AUTOVSCROLL;
            if (es->style & WS_HSCROLL)
                  es->style |= ES_AUTOHSCROLL;
            es->style &= ~ES_PASSWORD;
            if ((es->style & ES_CENTER) || (es->style & ES_RIGHT)) {
                        /* Confirmed - RIGHT overrides CENTER */
                  if (es->style & ES_RIGHT)
                        es->style &= ~ES_CENTER;
                  es->style &= ~WS_HSCROLL;
                  es->style &= ~ES_AUTOHSCROLL;
            }
      } else {
            es->buffer_limit = BUFLIMIT_INITIAL;
            if ((es->style & ES_RIGHT) && (es->style & ES_CENTER))
                  es->style &= ~ES_CENTER;
            es->style &= ~WS_HSCROLL;
            es->style &= ~WS_VSCROLL;
            if (es->style & ES_PASSWORD)
                  es->password_char = '*';
      }

      alloc_size = ROUND_TO_GROW((es->buffer_size + 1) * sizeof(WCHAR));
      if(!(es->hloc32W = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
          goto cleanup;
      es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;

      if (!(es->undo_text = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (es->buffer_size + 1) * sizeof(WCHAR))))
            goto cleanup;
      es->undo_buffer_size = es->buffer_size;

      if (es->style & ES_MULTILINE)
            if (!(es->first_line_def = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LINEDEF))))
                  goto cleanup;
      es->line_count = 1;

      /*
       * In Win95 look and feel, the WS_BORDER style is replaced by the
       * WS_EX_CLIENTEDGE style for the edit control. This gives the edit
       * control a nonclient area so we don't need to draw the border.
         * If WS_BORDER without WS_EX_CLIENTEDGE is specified we shouldn't have
         * a nonclient area and we should handle painting the border ourselves.
         *
         * When making modifications please ensure that the code still works
         * for edit controls created directly with style 0x50800000, exStyle 0
         * (which should have a single pixel border)
       */
      if (lpcs->dwExStyle & WS_EX_CLIENTEDGE)
            es->style &= ~WS_BORDER;
        else if (es->style & WS_BORDER)
            SetWindowLongW(hwnd, GWL_STYLE, es->style & ~WS_BORDER);

      return TRUE;

cleanup:
      SetWindowLongPtrW(es->hwndSelf, 0, 0);
      HeapFree(GetProcessHeap(), 0, es->first_line_def);
      HeapFree(GetProcessHeap(), 0, es->undo_text);
      if (es->hloc32W) LocalFree(es->hloc32W);
      HeapFree(GetProcessHeap(), 0, es);
      return FALSE;
}


/*********************************************************************
 *
 *    WM_CREATE
 *
 */
static LRESULT EDIT_WM_Create(EDITSTATE *es, LPCWSTR name)
{
        RECT clientRect;

      TRACE("%s\n", debugstr_w(name));
       /*
        *   To initialize some final structure members, we call some helper
        *   functions.  However, since the EDITSTATE is not consistent (i.e.
        *   not fully initialized), we should be very careful which
        *   functions can be called, and in what order.
        */
        EDIT_WM_SetFont(es, 0, FALSE);
        EDIT_EM_EmptyUndoBuffer(es);

        /* We need to calculate the format rect
           (applications may send EM_SETMARGINS before the control gets visible) */
        GetClientRect(es->hwndSelf, &clientRect);
        EDIT_SetRectNP(es, &clientRect);

       if (name && *name) {
         EDIT_EM_ReplaceSel(es, FALSE, name, FALSE, FALSE);
         /* if we insert text to the editline, the text scrolls out
            * of the window, as the caret is placed after the insert
            * pos normally; thus we reset es->selection... to 0 and
            * update caret
            */
         es->selection_start = es->selection_end = 0;
           /* Adobe Photoshop does NOT like this. and MSDN says that EN_CHANGE
            * Messages are only to be sent when the USER does something to
            * change the contents. So I am removing this EN_CHANGE
            *
            * EDIT_NOTIFY_PARENT(es, EN_CHANGE);
            */
         EDIT_EM_ScrollCaret(es);
       }
       /* force scroll info update */
       EDIT_UpdateScrollInfo(es);
       /* The rule seems to return 1 here for success */
       /* Power Builder masked edit controls will crash  */
       /* if not. */
       /* FIXME: is that in all cases so ? */
       return 1;
}


/*********************************************************************
 *
 *    WM_DESTROY
 *
 */
static LRESULT EDIT_WM_Destroy(EDITSTATE *es)
{
      LINEDEF *pc, *pp;

      if (es->hloc32W) {
            LocalFree(es->hloc32W);
      }
      if (es->hloc32A) {
            LocalFree(es->hloc32A);
      }
      if (es->hloc16) {
            STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
            HANDLE16 oldDS = stack16->ds;

            stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
            while (LocalUnlock16(es->hloc16)) ;
            LocalFree16(es->hloc16);
            stack16->ds = oldDS;
      }

      pc = es->first_line_def;
      while (pc)
      {
            pp = pc->next;
            HeapFree(GetProcessHeap(), 0, pc);
            pc = pp;
      }

      SetWindowLongPtrW( es->hwndSelf, 0, 0 );
      HeapFree(GetProcessHeap(), 0, es->undo_text);
      HeapFree(GetProcessHeap(), 0, es);

      return 0;
}


static inline LRESULT DefWindowProcT(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam, BOOL unicode)
{
      if(unicode)
            return DefWindowProcW(hwnd, msg, wParam, lParam);
      else
            return DefWindowProcA(hwnd, msg, wParam, lParam);
}

/*********************************************************************
 *
 *    EditWndProc_common
 *
 *    The messages are in the order of the actual integer values
 *    (which can be found in include/windows.h)
 *    Wherever possible the 16 bit versions are converted to
 *    the 32 bit ones, so that we can 'fall through' to the
 *    helper functions.  These are mostly 32 bit (with a few
 *    exceptions, clearly indicated by a '16' extension to their
 *    names).
 *
 */
static LRESULT EditWndProc_common( HWND hwnd, UINT msg,
                                   WPARAM wParam, LPARAM lParam, BOOL unicode )
{
      EDITSTATE *es = (EDITSTATE *)GetWindowLongPtrW( hwnd, 0 );
      LRESULT result = 0;

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

      if (!es && msg != WM_NCCREATE)
            return DefWindowProcT(hwnd, msg, wParam, lParam, unicode);

      if (es && (msg != WM_DESTROY)) EDIT_LockBuffer(es);

      switch (msg) {
      case EM_GETSEL16:
            wParam = 0;
            lParam = 0;
            /* fall through */
      case EM_GETSEL:
            result = EDIT_EM_GetSel(es, (PUINT)wParam, (PUINT)lParam);
            break;

      case EM_SETSEL16:
            if ((short)LOWORD(lParam) == -1)
                  EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
            else
                  EDIT_EM_SetSel(es, LOWORD(lParam), HIWORD(lParam), FALSE);
            if (!wParam)
                  EDIT_EM_ScrollCaret(es);
            result = 1;
            break;
      case EM_SETSEL:
            EDIT_EM_SetSel(es, wParam, lParam, FALSE);
            EDIT_EM_ScrollCaret(es);
            result = 1;
            break;

      case EM_GETRECT16:
            if (lParam)
                {
                    RECT16 *r16 = MapSL(lParam);
                    r16->left   = es->format_rect.left;
                    r16->top    = es->format_rect.top;
                    r16->right  = es->format_rect.right;
                    r16->bottom = es->format_rect.bottom;
                }
            break;
      case EM_GETRECT:
            if (lParam)
                  CopyRect((LPRECT)lParam, &es->format_rect);
            break;

      case EM_SETRECT16:
            if ((es->style & ES_MULTILINE) && lParam) {
                  RECT rc;
                  RECT16 *r16 = MapSL(lParam);
                  rc.left   = r16->left;
                  rc.top    = r16->top;
                  rc.right  = r16->right;
                  rc.bottom = r16->bottom;
                  EDIT_SetRectNP(es, &rc);
                  EDIT_UpdateText(es, NULL, TRUE);
            }
            break;
      case EM_SETRECT:
            if ((es->style & ES_MULTILINE) && lParam) {
                  EDIT_SetRectNP(es, (LPRECT)lParam);
                  EDIT_UpdateText(es, NULL, TRUE);
            }
            break;

      case EM_SETRECTNP16:
            if ((es->style & ES_MULTILINE) && lParam) {
                  RECT rc;
                  RECT16 *r16 = MapSL(lParam);
                  rc.left   = r16->left;
                  rc.top    = r16->top;
                  rc.right  = r16->right;
                  rc.bottom = r16->bottom;
                  EDIT_SetRectNP(es, &rc);
            }
            break;
      case EM_SETRECTNP:
            if ((es->style & ES_MULTILINE) && lParam)
                  EDIT_SetRectNP(es, (LPRECT)lParam);
            break;

      case EM_SCROLL16:
      case EM_SCROLL:
            result = EDIT_EM_Scroll(es, (INT)wParam);
                break;

      case EM_LINESCROLL16:
            wParam = (WPARAM)(INT)(SHORT)HIWORD(lParam);
            lParam = (LPARAM)(INT)(SHORT)LOWORD(lParam);
            /* fall through */
      case EM_LINESCROLL:
            result = (LRESULT)EDIT_EM_LineScroll(es, (INT)wParam, (INT)lParam);
            break;

      case EM_SCROLLCARET16:
      case EM_SCROLLCARET:
            EDIT_EM_ScrollCaret(es);
            result = 1;
            break;

      case EM_GETMODIFY16:
      case EM_GETMODIFY:
            result = ((es->flags & EF_MODIFIED) != 0);
            break;

      case EM_SETMODIFY16:
      case EM_SETMODIFY:
            if (wParam)
                  es->flags |= EF_MODIFIED;
            else
                        es->flags &= ~(EF_MODIFIED | EF_UPDATE);  /* reset pending updates */
            break;

      case EM_GETLINECOUNT16:
      case EM_GETLINECOUNT:
            result = (es->style & ES_MULTILINE) ? es->line_count : 1;
            break;

      case EM_LINEINDEX16:
            if ((INT16)wParam == -1)
                  wParam = (WPARAM)-1;
            /* fall through */
      case EM_LINEINDEX:
            result = (LRESULT)EDIT_EM_LineIndex(es, (INT)wParam);
            break;

      case EM_SETHANDLE16:
            EDIT_EM_SetHandle16(es, (HLOCAL16)wParam);
            break;
      case EM_SETHANDLE:
            EDIT_EM_SetHandle(es, (HLOCAL)wParam);
            break;

      case EM_GETHANDLE16:
            result = (LRESULT)EDIT_EM_GetHandle16(es);
            break;
      case EM_GETHANDLE:
            result = (LRESULT)EDIT_EM_GetHandle(es);
            break;

      case EM_GETTHUMB16:
      case EM_GETTHUMB:
            result = EDIT_EM_GetThumb(es);
            break;

      /* these messages missing from specs */
      case WM_USER+15:
      case 0x00bf:
      case WM_USER+16:
      case 0x00c0:
      case WM_USER+19:
      case 0x00c3:
      case WM_USER+26:
      case 0x00ca:
            FIXME("undocumented message 0x%x, please report\n", msg);
            result = DefWindowProcW(hwnd, msg, wParam, lParam);
            break;

      case EM_LINELENGTH16:
      case EM_LINELENGTH:
            result = (LRESULT)EDIT_EM_LineLength(es, (INT)wParam);
            break;

      case EM_REPLACESEL16:
            lParam = (LPARAM)MapSL(lParam);
            unicode = FALSE;  /* 16-bit message is always ascii */
            /* fall through */
      case EM_REPLACESEL:
      {
            LPWSTR textW;

            if(unicode)
                textW = (LPWSTR)lParam;
            else
            {
                LPSTR textA = (LPSTR)lParam;
                INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
                if((textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
                  MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
            }

            EDIT_EM_ReplaceSel(es, (BOOL)wParam, textW, TRUE, TRUE);
            result = 1;

            if(!unicode)
                HeapFree(GetProcessHeap(), 0, textW);
            break;
      }

      case EM_GETLINE16:
            lParam = (LPARAM)MapSL(lParam);
            unicode = FALSE;  /* 16-bit message is always ascii */
            /* fall through */
      case EM_GETLINE:
            result = (LRESULT)EDIT_EM_GetLine(es, (INT)wParam, (LPWSTR)lParam, unicode);
            break;

      case EM_LIMITTEXT16:
      case EM_SETLIMITTEXT:
            EDIT_EM_SetLimitText(es, wParam);
            break;

      case EM_CANUNDO16:
      case EM_CANUNDO:
            result = (LRESULT)EDIT_EM_CanUndo(es);
            break;

      case EM_UNDO16:
      case EM_UNDO:
      case WM_UNDO:
            result = (LRESULT)EDIT_EM_Undo(es);
            break;

      case EM_FMTLINES16:
      case EM_FMTLINES:
            result = (LRESULT)EDIT_EM_FmtLines(es, (BOOL)wParam);
            break;

      case EM_LINEFROMCHAR16:
      case EM_LINEFROMCHAR:
            result = (LRESULT)EDIT_EM_LineFromChar(es, (INT)wParam);
            break;

      case EM_SETTABSTOPS16:
            result = (LRESULT)EDIT_EM_SetTabStops16(es, (INT)wParam, MapSL(lParam));
            break;
      case EM_SETTABSTOPS:
            result = (LRESULT)EDIT_EM_SetTabStops(es, (INT)wParam, (LPINT)lParam);
            break;

      case EM_SETPASSWORDCHAR16:
            unicode = FALSE;  /* 16-bit message is always ascii */
            /* fall through */
      case EM_SETPASSWORDCHAR:
      {
            WCHAR charW = 0;

            if(unicode)
                charW = (WCHAR)wParam;
            else
            {
                CHAR charA = wParam;
                MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
            }

            EDIT_EM_SetPasswordChar(es, charW);
            break;
      }

      case EM_EMPTYUNDOBUFFER16:
      case EM_EMPTYUNDOBUFFER:
            EDIT_EM_EmptyUndoBuffer(es);
            break;

      case EM_GETFIRSTVISIBLELINE16:
            result = es->y_offset;
            break;
      case EM_GETFIRSTVISIBLELINE:
            result = (es->style & ES_MULTILINE) ? es->y_offset : es->x_offset;
            break;

      case EM_SETREADONLY16:
      case EM_SETREADONLY:
      {
            DWORD old_style = es->style;

            if (wParam) {
                    SetWindowLongW( hwnd, GWL_STYLE,
                                    GetWindowLongW( hwnd, GWL_STYLE ) | ES_READONLY );
                    es->style |= ES_READONLY;
            } else {
                    SetWindowLongW( hwnd, GWL_STYLE,
                                    GetWindowLongW( hwnd, GWL_STYLE ) & ~ES_READONLY );
                    es->style &= ~ES_READONLY;
            }

            if (old_style ^ es->style)
                InvalidateRect(es->hwndSelf, NULL, TRUE);

            result = 1;
            break;
      }

      case EM_SETWORDBREAKPROC16:
            EDIT_EM_SetWordBreakProc16(es, (EDITWORDBREAKPROC16)lParam);
            break;
      case EM_SETWORDBREAKPROC:
            EDIT_EM_SetWordBreakProc(es, (void *)lParam);
            break;

      case EM_GETWORDBREAKPROC16:
            result = (LRESULT)es->word_break_proc16;
            break;
      case EM_GETWORDBREAKPROC:
            result = (LRESULT)es->word_break_proc;
            break;

      case EM_GETPASSWORDCHAR16:
            unicode = FALSE;  /* 16-bit message is always ascii */
            /* fall through */
      case EM_GETPASSWORDCHAR:
      {
            if(unicode)
                result = es->password_char;
            else
            {
                WCHAR charW = es->password_char;
                CHAR charA = 0;
                WideCharToMultiByte(CP_ACP, 0, &charW, 1, &charA, 1, NULL, NULL);
                result = charA;
            }
            break;
      }

      /* The following EM_xxx are new to win95 and don't exist for 16 bit */

      case EM_SETMARGINS:
            EDIT_EM_SetMargins(es, (INT)wParam, LOWORD(lParam), HIWORD(lParam), TRUE);
            break;

      case EM_GETMARGINS:
            result = MAKELONG(es->left_margin, es->right_margin);
            break;

      case EM_GETLIMITTEXT:
            result = es->buffer_limit;
            break;

      case EM_POSFROMCHAR:
            if ((INT)wParam >= get_text_length(es)) result = -1;
            else result = EDIT_EM_PosFromChar(es, (INT)wParam, FALSE);
            break;

      case EM_CHARFROMPOS:
            result = EDIT_EM_CharFromPos(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
            break;

        /* End of the EM_ messages which were in numerical order; what order
         * are these in?  vaguely alphabetical?
         */

      case WM_NCCREATE:
            result = EDIT_WM_NCCreate(hwnd, (LPCREATESTRUCTW)lParam, unicode);
            break;

      case WM_DESTROY:
            result = EDIT_WM_Destroy(es);
            es = NULL;
            break;

      case WM_GETDLGCODE:
            result = DLGC_HASSETSEL | DLGC_WANTCHARS | DLGC_WANTARROWS;

            if (es->style & ES_MULTILINE)
               result |= DLGC_WANTALLKEYS;

                if (lParam)
                {
                    es->flags|=EF_DIALOGMODE;

                    if (((LPMSG)lParam)->message == WM_KEYDOWN)
                    {
                        int vk = (int)((LPMSG)lParam)->wParam;

                        if (es->hwndListBox)
                        {
                            if (vk == VK_RETURN || vk == VK_ESCAPE)
                                if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
                                    result |= DLGC_WANTMESSAGE;
                        }
                  }
                }
            break;

        case WM_IME_CHAR:
            if (!unicode)
            {
                WCHAR charW;
                CHAR  strng[2];

                strng[0] = wParam >> 8;
                strng[1] = wParam & 0xff;
                if (strng[0]) MultiByteToWideChar(CP_ACP, 0, strng, 2, &charW, 1);
                else MultiByteToWideChar(CP_ACP, 0, &strng[1], 1, &charW, 1);
            result = EDIT_WM_Char(es, charW);
            break;
            }
            /* fall through */
      case WM_CHAR:
      {
            WCHAR charW;

            if(unicode)
                charW = wParam;
            else
            {
                CHAR charA = wParam;
                MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
            }

                if (es->hwndListBox)
                {
                    if (charW == VK_RETURN || charW == VK_ESCAPE)
                    {
                        if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
                            SendMessageW(GetParent(hwnd), WM_KEYDOWN, charW, 0);
                        break;
                    }
                }
            result = EDIT_WM_Char(es, charW);
            break;
      }

        case WM_UNICHAR:
                if (unicode)
                {
                    if (wParam == UNICODE_NOCHAR) return TRUE;
                    if (wParam <= 0x000fffff)
                    {
                        if(wParam > 0xffff) /* convert to surrogates */
                        {
                            wParam -= 0x10000;
                            EDIT_WM_Char(es, (wParam >> 10) + 0xd800);
                            EDIT_WM_Char(es, (wParam & 0x03ff) + 0xdc00);
                        }
                        else EDIT_WM_Char(es, wParam);
                    }
                    return 0;
                }
                break;

      case WM_CLEAR:
            EDIT_WM_Clear(es);
            break;

      case WM_COMMAND:
            EDIT_WM_Command(es, HIWORD(wParam), LOWORD(wParam), (HWND)lParam);
            break;

        case WM_CONTEXTMENU:
            EDIT_WM_ContextMenu(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
            break;

      case WM_COPY:
            EDIT_WM_Copy(es);
            break;

      case WM_CREATE:
            if(unicode)
                result = EDIT_WM_Create(es, ((LPCREATESTRUCTW)lParam)->lpszName);
            else
            {
                LPCSTR nameA = ((LPCREATESTRUCTA)lParam)->lpszName;
                LPWSTR nameW = NULL;
                if(nameA)
                {
                  INT countW = MultiByteToWideChar(CP_ACP, 0, nameA, -1, NULL, 0);
                  if((nameW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
                      MultiByteToWideChar(CP_ACP, 0, nameA, -1, nameW, countW);
                }
                result = EDIT_WM_Create(es, nameW);
                    HeapFree(GetProcessHeap(), 0, nameW);
            }
            break;

      case WM_CUT:
            EDIT_WM_Cut(es);
            break;

      case WM_ENABLE:
                es->bEnableState = (BOOL) wParam;
            EDIT_UpdateText(es, NULL, TRUE);
            break;

      case WM_ERASEBKGND:
            /* we do the proper erase in EDIT_WM_Paint */
            result = 1;
            break;

      case WM_GETFONT:
            result = (LRESULT)es->font;
            break;

      case WM_GETTEXT:
            result = (LRESULT)EDIT_WM_GetText(es, (INT)wParam, (LPWSTR)lParam, unicode);
            break;

      case WM_GETTEXTLENGTH:
                if (unicode) result = get_text_length(es);
                else result = WideCharToMultiByte( CP_ACP, 0, es->text, get_text_length(es),
                                                   NULL, 0, NULL, NULL );
            break;

      case WM_HSCROLL:
            result = EDIT_WM_HScroll(es, LOWORD(wParam), (short)HIWORD(wParam));
            break;

      case WM_KEYDOWN:
            result = EDIT_WM_KeyDown(es, (INT)wParam);
            break;

      case WM_KILLFOCUS:
            result = EDIT_WM_KillFocus(es);
            break;

      case WM_LBUTTONDBLCLK:
            result = EDIT_WM_LButtonDblClk(es);
            break;

      case WM_LBUTTONDOWN:
            result = EDIT_WM_LButtonDown(es, wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
            break;

      case WM_LBUTTONUP:
            result = EDIT_WM_LButtonUp(es);
            break;

      case WM_MBUTTONDOWN:
            result = EDIT_WM_MButtonDown(es);
            break;

      case WM_MOUSEMOVE:
            result = EDIT_WM_MouseMove(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
            break;

      case WM_PRINTCLIENT:
      case WM_PAINT:
              EDIT_WM_Paint(es, (HDC)wParam);
            break;

      case WM_PASTE:
            EDIT_WM_Paste(es);
            break;

      case WM_SETFOCUS:
            EDIT_WM_SetFocus(es);
            break;

      case WM_SETFONT:
            EDIT_WM_SetFont(es, (HFONT)wParam, LOWORD(lParam) != 0);
            break;

      case WM_SETREDRAW:
            /* FIXME: actually set an internal flag and behave accordingly */
            break;

      case WM_SETTEXT:
            EDIT_WM_SetText(es, (LPCWSTR)lParam, unicode);
            result = TRUE;
            break;

      case WM_SIZE:
            EDIT_WM_Size(es, (UINT)wParam, LOWORD(lParam), HIWORD(lParam));
            break;

        case WM_STYLECHANGED:
                result = EDIT_WM_StyleChanged(es, wParam, (const STYLESTRUCT *)lParam);
                break;

        case WM_STYLECHANGING:
                result = 0; /* See EDIT_WM_StyleChanged */
                break;

      case WM_SYSKEYDOWN:
            result = EDIT_WM_SysKeyDown(es, (INT)wParam, (DWORD)lParam);
            break;

      case WM_TIMER:
            EDIT_WM_Timer(es);
            break;

      case WM_VSCROLL:
            result = EDIT_WM_VScroll(es, LOWORD(wParam), (short)HIWORD(wParam));
            break;

        case WM_MOUSEWHEEL:
                {
                    int gcWheelDelta = 0;
                    UINT pulScrollLines = 3;
                    SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);

                    if (wParam & (MK_SHIFT | MK_CONTROL)) {
                        result = DefWindowProcW(hwnd, msg, wParam, lParam);
                        break;
                    }
                    gcWheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
                    if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
                    {
                        int cLineScroll= (int) min((UINT) es->line_count, pulScrollLines);
                        cLineScroll *= (gcWheelDelta / WHEEL_DELTA);
                  result = EDIT_EM_LineScroll(es, 0, cLineScroll);
                    }
                }
                break;


      /* IME messages to make the edit control IME aware */
      case WM_IME_SETCONTEXT:
            break;

      case WM_IME_STARTCOMPOSITION:
            es->composition_start = es->selection_end;
            es->composition_len = 0;
            break;

      case WM_IME_COMPOSITION:
                EDIT_ImeComposition(hwnd, lParam, es);
            break;

      case WM_IME_ENDCOMPOSITION:
                if (es->composition_len > 0)
                {
                        static const WCHAR empty_stringW[] = {0};
                        EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
                        es->selection_end = es->selection_start;
                        es->composition_len= 0;
                }
            break;

      case WM_IME_COMPOSITIONFULL:
            break;

      case WM_IME_SELECT:
            break;

      case WM_IME_CONTROL:
            break;

      default:
            result = DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
            break;
      }

      if (es) EDIT_UnlockBuffer(es, FALSE);

        TRACE("hwnd=%p msg=%x (%s) -- 0x%08lx\n", hwnd, msg, SPY_GetMsgName(msg, hwnd), result);

      return result;
}

/*********************************************************************
 *
 *    EditWndProc   (USER32.@)
 */
LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    return EditWndProc_common(hWnd, uMsg, wParam, lParam, FALSE);
}

/*********************************************************************
 *
 *    EditWndProcW
 */
static LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    return EditWndProc_common(hWnd, uMsg, wParam, lParam, TRUE);
}

/*********************************************************************
 * edit class descriptor
 */
static const WCHAR editW[] = {'E','d','i','t',0};
const struct builtin_class_descr EDIT_builtin_class =
{
    editW,                /* name */
    CS_DBLCLKS | CS_PARENTDC,   /* style */
    EditWndProcA,         /* procA */
    EditWndProcW,         /* procW */
#ifdef _WIN64
    sizeof(EDITSTATE *),  /* extra */
#else
    sizeof(EDITSTATE *) + sizeof(HANDLE16), /* extra */
#endif
    IDC_IBEAM,            /* cursor */
    0                     /* brush */
};

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