controls/edit.c

   1 /*
   2  *      Edit control
   3  *
   4  *      Copyright  David W. Metcalfe, 1994
   5  *      Copyright  William Magro, 1995, 1996
   6  *      Copyright  Frans van Dorsselaer, 1996, 1997
   7  *
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * TODO:
  24  *   - ES_CENTER
  25  *   - ES_RIGHT
  26  *   - ES_NUMBER (new since win95)
  27  *   - ES_OEMCONVERT
  28  *   -!ES_AUTOVSCROLL (every multi line control *is* auto vscroll)
  29  *   -!ES_AUTOHSCROLL (every single line control *is* auto hscroll)
  30  *
  31  * When there is no autoscrolling, the control should first check whether
  32  * the new text would fit.  If not, an EN_MAXTEXT should be sent.
  33  * However, currently this would require the actual change to be made,
  34  * then call EDIT_BuildLineDefs() and then find out that the new text doesn't
  35  * fit.  After all this, things should be put back in the state before the
  36  * changes. Note that for multi line controls !ES_AUTOHSCROLL works : wordwrap.
  37  *
  38  */
  39
  40 #include "config.h"
  41
  42 #include <string.h>
  43 #include <stdlib.h>
  44
  45 #include "winbase.h"
  46 #include "winnt.h"
  47 #include "wownt32.h"
  48 #include "win.h"
  49 #include "wine/winbase16.h"
  50 #include "wine/winuser16.h"
  51 #include "wine/unicode.h"
  52 #include "controls.h"
  53 #include "local.h"
  54 #include "user.h"
  55 #include "wine/debug.h"
  56
  57 WINE_DEFAULT_DEBUG_CHANNEL(edit);
  58 WINE_DECLARE_DEBUG_CHANNEL(combo);
  59 WINE_DECLARE_DEBUG_CHANNEL(relay);
  60
  61 #define BUFLIMIT_MULTI          65534   /* maximum buffer size (not including '\0')
  62                                            FIXME: BTW, new specs say 65535 (do you dare ???) */
  63 #define BUFLIMIT_SINGLE         32766   /* maximum buffer size (not including '\0') */
  64 #define GROWLENGTH              32      /* buffers granularity in bytes: must be power of 2 */
  65 #define ROUND_TO_GROW(size)     (((size) + (GROWLENGTH - 1)) & ~(GROWLENGTH - 1))
  66 #define HSCROLL_FRACTION        3       /* scroll window by 1/3 width */
  67
  68 /*
  69  *      extra flags for EDITSTATE.flags field
  70  */
  71 #define EF_MODIFIED             0x0001  /* text has been modified */
  72 #define EF_FOCUSED              0x0002  /* we have input focus */
  73 #define EF_UPDATE               0x0004  /* notify parent of changed state */
  74 #define EF_VSCROLL_TRACK        0x0008  /* don't SetScrollPos() since we are tracking the thumb */
  75 #define EF_HSCROLL_TRACK        0x0010  /* don't SetScrollPos() since we are tracking the thumb */
  76 #define EF_AFTER_WRAP           0x0080  /* the caret is displayed after the last character of a
  77                                            wrapped line, instead of in front of the next character */
  78 #define EF_USE_SOFTBRK          0x0100  /* Enable soft breaks in text. */
  79
  80 typedef enum
  81 {
  82         END_0 = 0,                      /* line ends with terminating '\0' character */
  83         END_WRAP,                       /* line is wrapped */
  84         END_HARD,                       /* line ends with a hard return '\r\n' */
  85         END_SOFT,                       /* line ends with a soft return '\r\r\n' */
  86         END_RICH                        /* line ends with a single '\n' */
  87 } LINE_END;
  88
  89 typedef struct tagLINEDEF {
  90         INT length;                     /* bruto length of a line in bytes */
  91         INT net_length;                 /* netto length of a line in visible characters */
  92         LINE_END ending;
  93         INT width;                      /* width of the line in pixels */
  94         INT index;                      /* line index into the buffer */
  95         struct tagLINEDEF *next;
  96 } LINEDEF;
  97
  98 typedef struct
  99 {
 100         BOOL is_unicode;                /* how the control was created */
 101         LPWSTR text;                    /* the actual contents of the control */
 102         UINT buffer_size;               /* the size of the buffer in characters */
 103         UINT buffer_limit;              /* the maximum size to which the buffer may grow in characters */
 104         HFONT font;                     /* NULL means standard system font */
 105         INT x_offset;                   /* scroll offset        for multi lines this is in pixels
 106                                                                 for single lines it's in characters */
 107         INT line_height;                /* height of a screen line in pixels */
 108         INT char_width;                 /* average character width in pixels */
 109         DWORD style;                    /* sane version of wnd->dwStyle */
 110         WORD flags;                     /* flags that are not in es->style or wnd->flags (EF_XXX) */
 111         INT undo_insert_count;          /* number of characters inserted in sequence */
 112         UINT undo_position;             /* character index of the insertion and deletion */
 113         LPWSTR undo_text;               /* deleted text */
 114         UINT undo_buffer_size;          /* size of the deleted text buffer */
 115         INT selection_start;            /* == selection_end if no selection */
 116         INT selection_end;              /* == current caret position */
 117         WCHAR password_char;            /* == 0 if no password char, and for multi line controls */
 118         INT left_margin;                /* in pixels */
 119         INT right_margin;               /* in pixels */
 120         RECT format_rect;
 121         INT text_width;                 /* width of the widest line in pixels for multi line controls
 122                                            and just line width for single line controls */
 123         INT region_posx;                /* Position of cursor relative to region: */
 124         INT region_posy;                /* -1: to left, 0: within, 1: to right */
 125         EDITWORDBREAKPROC16 word_break_proc16;
 126         void *word_break_proc;          /* 32-bit word break proc: ANSI or Unicode */
 127         INT line_count;                 /* number of lines */
 128         INT y_offset;                   /* scroll offset in number of lines */
 129         BOOL bCaptureState;             /* flag indicating whether mouse was captured */
 130         BOOL bEnableState;              /* flag keeping the enable state */
 131         HWND hwndSelf;                  /* the our window handle */
 132         HWND hwndParent;                /* Handle of parent for sending EN_* messages.
 133                                            Even if parent will change, EN_* messages
 134                                            should be sent to the first parent. */
 135         HWND hwndListBox;               /* handle of ComboBox's listbox or NULL */
 136         /*
 137          *      only for multi line controls
 138          */
 139         INT lock_count;                 /* amount of re-entries in the EditWndProc */
 140         INT tabs_count;
 141         LPINT tabs;
 142         LINEDEF *first_line_def;        /* linked list of (soft) linebreaks */
 143         HLOCAL hloc32W;                 /* our unicode local memory block */
 144         HLOCAL16 hloc16;                /* alias for 16-bit control receiving EM_GETHANDLE16
 145                                            or EM_SETHANDLE16 */
 146         HLOCAL hloc32A;                 /* alias for ANSI control receiving EM_GETHANDLE
 147                                            or EM_SETHANDLE */
 148 } EDITSTATE;
 149
 150
 151 #define SWAP_UINT32(x,y) do { UINT temp = (UINT)(x); (x) = (UINT)(y); (y) = temp; } while(0)
 152 #define ORDER_UINT(x,y) do { if ((UINT)(y) < (UINT)(x)) SWAP_UINT32((x),(y)); } while(0)
 153
 154 /* used for disabled or read-only edit control */
 155 #define EDIT_NOTIFY_PARENT(es, wNotifyCode, str) \
 156         do \
 157         { /* Notify parent which has created this edit control */ \
 158             TRACE("notification " str " sent to hwnd=%p\n", es->hwndParent); \
 159             SendMessageW(es->hwndParent, WM_COMMAND, \
 160                      MAKEWPARAM(GetWindowLongW((es->hwndSelf),GWL_ID), wNotifyCode), \
 161                      (LPARAM)(es->hwndSelf)); \
 162         } while(0)
 163
 164 /*********************************************************************
 165  *
 166  *      Declarations
 167  *
 168  */
 169
 170 /*
 171  *      These functions have trivial implementations
 172  *      We still like to call them internally
 173  *      "static inline" makes them more like macro's
 174  */
 175 static inline BOOL      EDIT_EM_CanUndo(EDITSTATE *es);
 176 static inline void      EDIT_EM_EmptyUndoBuffer(EDITSTATE *es);
 177 static inline void      EDIT_WM_Clear(EDITSTATE *es);
 178 static inline void      EDIT_WM_Cut(EDITSTATE *es);
 179
 180 /*
 181  *      Helper functions only valid for one type of control
 182  */
 183 static void     EDIT_BuildLineDefs_ML(EDITSTATE *es, INT iStart, INT iEnd, INT delta, HRGN hrgn);
 184 static void     EDIT_CalcLineWidth_SL(EDITSTATE *es);
 185 static LPWSTR   EDIT_GetPasswordPointer_SL(EDITSTATE *es);
 186 static void     EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend);
 187 static void     EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend);
 188 static void     EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend);
 189 static void     EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend);
 190 /*
 191  *      Helper functions valid for both single line _and_ multi line controls
 192  */
 193 static INT      EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action);
 194 static INT      EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap);
 195 static void     EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y);
 196 static void     EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc);
 197 static void     EDIT_InvalidateText(EDITSTATE *es, INT start, INT end);
 198 static void     EDIT_LockBuffer(EDITSTATE *es);
 199 static BOOL     EDIT_MakeFit(EDITSTATE *es, UINT size, BOOL honor_limit);
 200 static BOOL     EDIT_MakeUndoFit(EDITSTATE *es, UINT size);
 201 static void     EDIT_MoveBackward(EDITSTATE *es, BOOL extend);
 202 static void     EDIT_MoveEnd(EDITSTATE *es, BOOL extend);
 203 static void     EDIT_MoveForward(EDITSTATE *es, BOOL extend);
 204 static void     EDIT_MoveHome(EDITSTATE *es, BOOL extend);
 205 static void     EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend);
 206 static void     EDIT_MoveWordForward(EDITSTATE *es, BOOL extend);
 207 static void     EDIT_PaintLine(EDITSTATE *es, HDC hdc, INT line, BOOL rev);
 208 static INT      EDIT_PaintText(EDITSTATE *es, HDC hdc, INT x, INT y, INT line, INT col, INT count, BOOL rev);
 209 static void     EDIT_SetCaretPos(EDITSTATE *es, INT pos, BOOL after_wrap);
 210 static void     EDIT_SetRectNP(EDITSTATE *es, LPRECT lprc);
 211 static void     EDIT_UnlockBuffer(EDITSTATE *es, BOOL force);
 212 static void     EDIT_UpdateScrollInfo(EDITSTATE *es);
 213 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action);
 214 /*
 215  *      EM_XXX message handlers
 216  */
 217 static LRESULT  EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y);
 218 static BOOL     EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol);
 219 static HLOCAL   EDIT_EM_GetHandle(EDITSTATE *es);
 220 static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es);
 221 static INT      EDIT_EM_GetLine(EDITSTATE *es, INT line, LPARAM lParam, BOOL unicode);
 222 static LRESULT  EDIT_EM_GetSel(EDITSTATE *es, PUINT start, PUINT end);
 223 static LRESULT  EDIT_EM_GetThumb(EDITSTATE *es);
 224 static INT      EDIT_EM_LineFromChar(EDITSTATE *es, INT index);
 225 static INT      EDIT_EM_LineIndex(EDITSTATE *es, INT line);
 226 static INT      EDIT_EM_LineLength(EDITSTATE *es, INT index);
 227 static BOOL     EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy);
 228 static BOOL     EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy);
 229 static LRESULT  EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap);
 230 static void     EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit);
 231 static LRESULT  EDIT_EM_Scroll(EDITSTATE *es, INT action);
 232 static void     EDIT_EM_ScrollCaret(EDITSTATE *es);
 233 static void     EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc);
 234 static void     EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc);
 235 static void     EDIT_EM_SetLimitText(EDITSTATE *es, INT limit);
 236 static void     EDIT_EM_SetMargins(EDITSTATE *es, INT action, INT left, INT right);
 237 static void     EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c);
 238 static void     EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap);
 239 static BOOL     EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs);
 240 static BOOL     EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs);
 241 static void     EDIT_EM_SetWordBreakProc(EDITSTATE *es, LPARAM lParam);
 242 static void     EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp);
 243 static BOOL     EDIT_EM_Undo(EDITSTATE *es);
 244 /*
 245  *      WM_XXX message handlers
 246  */
 247 static void     EDIT_WM_Char(EDITSTATE *es, WCHAR c);
 248 static void     EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND conrtol);
 249 static void     EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y);
 250 static void     EDIT_WM_Copy(EDITSTATE *es);
 251 static LRESULT  EDIT_WM_Create(EDITSTATE *es, LPCWSTR name);
 252 static LRESULT  EDIT_WM_Destroy(EDITSTATE *es);
 253 static LRESULT  EDIT_WM_EraseBkGnd(EDITSTATE *es, HDC dc);
 254 static INT      EDIT_WM_GetText(EDITSTATE *es, INT count, LPARAM lParam, BOOL unicode);
 255 static LRESULT  EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos);
 256 static LRESULT  EDIT_WM_KeyDown(EDITSTATE *es, INT key);
 257 static LRESULT  EDIT_WM_KillFocus(EDITSTATE *es);
 258 static LRESULT  EDIT_WM_LButtonDblClk(EDITSTATE *es);
 259 static LRESULT  EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y);
 260 static LRESULT  EDIT_WM_LButtonUp(EDITSTATE *es);
 261 static LRESULT  EDIT_WM_MButtonDown(EDITSTATE *es);
 262 static LRESULT  EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y);
 263 static LRESULT  EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode);
 264 static void     EDIT_WM_Paint(EDITSTATE *es, WPARAM wParam);
 265 static void     EDIT_WM_Paste(EDITSTATE *es);
 266 static void     EDIT_WM_SetFocus(EDITSTATE *es);
 267 static void     EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw);
 268 static void     EDIT_WM_SetText(EDITSTATE *es, LPARAM lParam, BOOL unicode);
 269 static void     EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height);
 270 static LRESULT  EDIT_WM_StyleChanged(EDITSTATE *es, WPARAM which, const STYLESTRUCT *style);
 271 static LRESULT  EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data);
 272 static void     EDIT_WM_Timer(EDITSTATE *es);
 273 static LRESULT  EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos);
 274 static void     EDIT_UpdateText(EDITSTATE *es, LPRECT rc, BOOL bErase);
 275 static void     EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase);
 276
 277 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 278 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 279
 280 /*********************************************************************
 281  * edit class descriptor
 282  */
 283 const struct builtin_class_descr EDIT_builtin_class =
 284 {
 285     "Edit",               /* name */
 286     CS_GLOBALCLASS | CS_DBLCLKS | CS_PARENTDC,   /* style */
 287     EditWndProcA,         /* procA */
 288     EditWndProcW,         /* procW */
 289     sizeof(EDITSTATE *),  /* extra */
 290     IDC_IBEAMA,           /* cursor */
 291     0                     /* brush */
 292 };
 293
 294
 295 /*********************************************************************
 296  *
 297  *      EM_CANUNDO
 298  *
 299  */
 300 static inline BOOL EDIT_EM_CanUndo(EDITSTATE *es)
 301 {
 302         return (es->undo_insert_count || strlenW(es->undo_text));
 303 }
 304
 305
 306 /*********************************************************************
 307  *
 308  *      EM_EMPTYUNDOBUFFER
 309  *
 310  */
 311 static inline void EDIT_EM_EmptyUndoBuffer(EDITSTATE *es)
 312 {
 313         es->undo_insert_count = 0;
 314         *es->undo_text = '\0';
 315 }
 316
 317
 318 /*********************************************************************
 319  *
 320  *      WM_CLEAR
 321  *
 322  */
 323 static inline void EDIT_WM_Clear(EDITSTATE *es)
 324 {
 325         static const WCHAR empty_stringW[] = {0};
 326
 327         /* Protect read-only edit control from modification */
 328         if(es->style & ES_READONLY)
 329             return;
 330
 331         EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
 332 }
 333
 334
 335 /*********************************************************************
 336  *
 337  *      WM_CUT
 338  *
 339  */
 340 static inline void EDIT_WM_Cut(EDITSTATE *es)
 341 {
 342         EDIT_WM_Copy(es);
 343         EDIT_WM_Clear(es);
 344 }
 345
 346
 347 /**********************************************************************
 348  *         get_app_version
 349  *
 350  * Returns the window version in case Wine emulates a later version
 351  * of windows then the application expects.
 352  *
 353  * In a number of cases when windows runs an application that was
 354  * designed for an earlier windows version, windows reverts
 355  * to "old" behaviour of that earlier version.
 356  *
 357  * An example is a disabled  edit control that needs to be painted.
 358  * Old style behaviour is to send a WM_CTLCOLOREDIT message. This was
 359  * changed in Win95, NT4.0 by a WM_CTLCOLORSTATIC message _only_ for
 360  * applications with an expected version 0f 4.0 or higher.
 361  *
 362  */
 363 static DWORD get_app_version(void)
 364 {
 365     static DWORD version;
 366     if (!version)
 367     {
 368         DWORD dwEmulatedVersion;
 369         OSVERSIONINFOW info;
 370         DWORD dwProcVersion = GetProcessVersion(0);
 371
 372         info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);
 373         GetVersionExW( &info );
 374         dwEmulatedVersion = MAKELONG( info.dwMinorVersion, info.dwMajorVersion );
 375         /* FIXME: this may not be 100% correct; see discussion on the
 376          * wine developer list in Nov 1999 */
 377         version = dwProcVersion < dwEmulatedVersion ? dwProcVersion : dwEmulatedVersion;
 378     }
 379     return version;
 380 }
 381
 382
 383 static HBRUSH EDIT_NotifyCtlColor(EDITSTATE *es, HDC hdc)
 384 {
 385         UINT msg;
 386
 387         if ( get_app_version() >= 0x40000 && (!es->bEnableState || (es->style & ES_READONLY)))
 388                 msg = WM_CTLCOLORSTATIC;
 389         else
 390                 msg = WM_CTLCOLOREDIT;
 391
 392         /* why do we notify to es->hwndParent, and we send this one to GetParent()? */
 393         return (HBRUSH)SendMessageW(GetParent(es->hwndSelf), msg, (WPARAM)hdc, (LPARAM)es->hwndSelf);
 394 }
 395
 396 static inline LRESULT DefWindowProcT(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam, BOOL unicode)
 397 {
 398         if(unicode)
 399                 return DefWindowProcW(hwnd, msg, wParam, lParam);
 400         else
 401                 return DefWindowProcA(hwnd, msg, wParam, lParam);
 402 }
 403
 404 /*********************************************************************
 405  *
 406  *      EditWndProc_common
 407  *
 408  *      The messages are in the order of the actual integer values
 409  *      (which can be found in include/windows.h)
 410  *      Wherever possible the 16 bit versions are converted to
 411  *      the 32 bit ones, so that we can 'fall through' to the
 412  *      helper functions.  These are mostly 32 bit (with a few
 413  *      exceptions, clearly indicated by a '16' extension to their
 414  *      names).
 415  *
 416  */
 417 static LRESULT WINAPI EditWndProc_common( HWND hwnd, UINT msg,
 418                                           WPARAM wParam, LPARAM lParam, BOOL unicode )
 419 {
 420         EDITSTATE *es = (EDITSTATE *)GetWindowLongW( hwnd, 0 );
 421         LRESULT result = 0;
 422
 423         TRACE("hwnd=%p msg=%x wparam=%x lparam=%lx\n", hwnd, msg, wParam, lParam);
 424
 425         if (!es && msg != WM_NCCREATE)
 426                 return DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
 427         else if (msg == WM_NCCREATE)
 428                 return EDIT_WM_NCCreate(hwnd, (LPCREATESTRUCTW)lParam, unicode);
 429         else if (msg == WM_DESTROY)
 430                 return EDIT_WM_Destroy(es);
 431
 432
 433         if (es) EDIT_LockBuffer(es);
 434
 435         switch (msg) {
 436         case EM_GETSEL16:
 437                 wParam = 0;
 438                 lParam = 0;
 439                 /* fall through */
 440         case EM_GETSEL:
 441                 result = EDIT_EM_GetSel(es, (PUINT)wParam, (PUINT)lParam);
 442                 break;
 443
 444         case EM_SETSEL16:
 445                 if (SLOWORD(lParam) == -1)
 446                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
 447                 else
 448                         EDIT_EM_SetSel(es, LOWORD(lParam), HIWORD(lParam), FALSE);
 449                 if (!wParam)
 450                         EDIT_EM_ScrollCaret(es);
 451                 result = 1;
 452                 break;
 453         case EM_SETSEL:
 454                 EDIT_EM_SetSel(es, wParam, lParam, FALSE);
 455                 EDIT_EM_ScrollCaret(es);
 456                 result = 1;
 457                 break;
 458
 459         case EM_GETRECT16:
 460                 if (lParam)
 461                         CONV_RECT32TO16(&es->format_rect, MapSL(lParam));
 462                 break;
 463         case EM_GETRECT:
 464                 if (lParam)
 465                         CopyRect((LPRECT)lParam, &es->format_rect);
 466                 break;
 467
 468         case EM_SETRECT16:
 469                 if ((es->style & ES_MULTILINE) && lParam) {
 470                         RECT rc;
 471                         CONV_RECT16TO32(MapSL(lParam), &rc);
 472                         EDIT_SetRectNP(es, &rc);
 473                         EDIT_UpdateText(es, NULL, TRUE);
 474                 }
 475                 break;
 476         case EM_SETRECT:
 477                 if ((es->style & ES_MULTILINE) && lParam) {
 478                         EDIT_SetRectNP(es, (LPRECT)lParam);
 479                         EDIT_UpdateText(es, NULL, TRUE);
 480                 }
 481                 break;
 482
 483         case EM_SETRECTNP16:
 484                 if ((es->style & ES_MULTILINE) && lParam) {
 485                         RECT rc;
 486                         CONV_RECT16TO32(MapSL(lParam), &rc);
 487                         EDIT_SetRectNP(es, &rc);
 488                 }
 489                 break;
 490         case EM_SETRECTNP:
 491                 if ((es->style & ES_MULTILINE) && lParam)
 492                         EDIT_SetRectNP(es, (LPRECT)lParam);
 493                 break;
 494
 495         case EM_SCROLL16:
 496         case EM_SCROLL:
 497                 result = EDIT_EM_Scroll(es, (INT)wParam);
 498                 break;
 499
 500         case EM_LINESCROLL16:
 501                 wParam = (WPARAM)(INT)SHIWORD(lParam);
 502                 lParam = (LPARAM)(INT)SLOWORD(lParam);
 503                 /* fall through */
 504         case EM_LINESCROLL:
 505                 result = (LRESULT)EDIT_EM_LineScroll(es, (INT)wParam, (INT)lParam);
 506                 break;
 507
 508         case EM_SCROLLCARET16:
 509         case EM_SCROLLCARET:
 510                 EDIT_EM_ScrollCaret(es);
 511                 result = 1;
 512                 break;
 513
 514         case EM_GETMODIFY16:
 515         case EM_GETMODIFY:
 516                 result = ((es->flags & EF_MODIFIED) != 0);
 517                 break;
 518
 519         case EM_SETMODIFY16:
 520         case EM_SETMODIFY:
 521                 if (wParam)
 522                         es->flags |= EF_MODIFIED;
 523                 else
 524                         es->flags &= ~(EF_MODIFIED | EF_UPDATE);  /* reset pending updates */
 525                 break;
 526
 527         case EM_GETLINECOUNT16:
 528         case EM_GETLINECOUNT:
 529                 result = (es->style & ES_MULTILINE) ? es->line_count : 1;
 530                 break;
 531
 532         case EM_LINEINDEX16:
 533                 if ((INT16)wParam == -1)
 534                         wParam = (WPARAM)-1;
 535                 /* fall through */
 536         case EM_LINEINDEX:
 537                 result = (LRESULT)EDIT_EM_LineIndex(es, (INT)wParam);
 538                 break;
 539
 540         case EM_SETHANDLE16:
 541                 EDIT_EM_SetHandle16(es, (HLOCAL16)wParam);
 542                 break;
 543         case EM_SETHANDLE:
 544                 EDIT_EM_SetHandle(es, (HLOCAL)wParam);
 545                 break;
 546
 547         case EM_GETHANDLE16:
 548                 result = (LRESULT)EDIT_EM_GetHandle16(es);
 549                 break;
 550         case EM_GETHANDLE:
 551                 result = (LRESULT)EDIT_EM_GetHandle(es);
 552                 break;
 553
 554         case EM_GETTHUMB16:
 555         case EM_GETTHUMB:
 556                 result = EDIT_EM_GetThumb(es);
 557                 break;
 558
 559         /* these messages missing from specs */
 560         case WM_USER+15:
 561         case 0x00bf:
 562         case WM_USER+16:
 563         case 0x00c0:
 564         case WM_USER+19:
 565         case 0x00c3:
 566         case WM_USER+26:
 567         case 0x00ca:
 568                 FIXME("undocumented message 0x%x, please report\n", msg);
 569                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 570                 break;
 571
 572         case EM_LINELENGTH16:
 573         case EM_LINELENGTH:
 574                 result = (LRESULT)EDIT_EM_LineLength(es, (INT)wParam);
 575                 break;
 576
 577         case EM_REPLACESEL16:
 578                 lParam = (LPARAM)MapSL(lParam);
 579                 unicode = FALSE;  /* 16-bit message is always ascii */
 580                 /* fall through */
 581         case EM_REPLACESEL:
 582         {
 583                 LPWSTR textW;
 584
 585                 if(unicode)
 586                     textW = (LPWSTR)lParam;
 587                 else
 588                 {
 589                     LPSTR textA = (LPSTR)lParam;
 590                     INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
 591                     if((textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 592                         MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
 593                 }
 594
 595                 EDIT_EM_ReplaceSel(es, (BOOL)wParam, textW, TRUE, TRUE);
 596                 result = 1;
 597
 598                 if(!unicode)
 599                     HeapFree(GetProcessHeap(), 0, textW);
 600                 break;
 601         }
 602
 603         case EM_GETLINE16:
 604                 lParam = (LPARAM)MapSL(lParam);
 605                 unicode = FALSE;  /* 16-bit message is always ascii */
 606                 /* fall through */
 607         case EM_GETLINE:
 608                 result = (LRESULT)EDIT_EM_GetLine(es, (INT)wParam, lParam, unicode);
 609                 break;
 610
 611         case EM_LIMITTEXT16:
 612         case EM_SETLIMITTEXT:
 613                 EDIT_EM_SetLimitText(es, (INT)wParam);
 614                 break;
 615
 616         case EM_CANUNDO16:
 617         case EM_CANUNDO:
 618                 result = (LRESULT)EDIT_EM_CanUndo(es);
 619                 break;
 620
 621         case EM_UNDO16:
 622         case EM_UNDO:
 623         case WM_UNDO:
 624                 result = (LRESULT)EDIT_EM_Undo(es);
 625                 break;
 626
 627         case EM_FMTLINES16:
 628         case EM_FMTLINES:
 629                 result = (LRESULT)EDIT_EM_FmtLines(es, (BOOL)wParam);
 630                 break;
 631
 632         case EM_LINEFROMCHAR16:
 633         case EM_LINEFROMCHAR:
 634                 result = (LRESULT)EDIT_EM_LineFromChar(es, (INT)wParam);
 635                 break;
 636
 637         case EM_SETTABSTOPS16:
 638                 result = (LRESULT)EDIT_EM_SetTabStops16(es, (INT)wParam, MapSL(lParam));
 639                 break;
 640         case EM_SETTABSTOPS:
 641                 result = (LRESULT)EDIT_EM_SetTabStops(es, (INT)wParam, (LPINT)lParam);
 642                 break;
 643
 644         case EM_SETPASSWORDCHAR16:
 645                 unicode = FALSE;  /* 16-bit message is always ascii */
 646                 /* fall through */
 647         case EM_SETPASSWORDCHAR:
 648         {
 649                 WCHAR charW = 0;
 650
 651                 if(unicode)
 652                     charW = (WCHAR)wParam;
 653                 else
 654                 {
 655                     CHAR charA = wParam;
 656                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 657                 }
 658
 659                 EDIT_EM_SetPasswordChar(es, charW);
 660                 break;
 661         }
 662
 663         case EM_EMPTYUNDOBUFFER16:
 664         case EM_EMPTYUNDOBUFFER:
 665                 EDIT_EM_EmptyUndoBuffer(es);
 666                 break;
 667
 668         case EM_GETFIRSTVISIBLELINE16:
 669                 result = es->y_offset;
 670                 break;
 671         case EM_GETFIRSTVISIBLELINE:
 672                 result = (es->style & ES_MULTILINE) ? es->y_offset : es->x_offset;
 673                 break;
 674
 675         case EM_SETREADONLY16:
 676         case EM_SETREADONLY:
 677                 if (wParam) {
 678                     SetWindowLongW( hwnd, GWL_STYLE,
 679                                     GetWindowLongW( hwnd, GWL_STYLE ) | ES_READONLY );
 680                     es->style |= ES_READONLY;
 681                 } else {
 682                     SetWindowLongW( hwnd, GWL_STYLE,
 683                                     GetWindowLongW( hwnd, GWL_STYLE ) & ~ES_READONLY );
 684                     es->style &= ~ES_READONLY;
 685                 }
 686                 result = 1;
 687                 break;
 688
 689         case EM_SETWORDBREAKPROC16:
 690                 EDIT_EM_SetWordBreakProc16(es, (EDITWORDBREAKPROC16)lParam);
 691                 break;
 692         case EM_SETWORDBREAKPROC:
 693                 EDIT_EM_SetWordBreakProc(es, lParam);
 694                 break;
 695
 696         case EM_GETWORDBREAKPROC16:
 697                 result = (LRESULT)es->word_break_proc16;
 698                 break;
 699         case EM_GETWORDBREAKPROC:
 700                 result = (LRESULT)es->word_break_proc;
 701                 break;
 702
 703         case EM_GETPASSWORDCHAR16:
 704                 unicode = FALSE;  /* 16-bit message is always ascii */
 705                 /* fall through */
 706         case EM_GETPASSWORDCHAR:
 707         {
 708                 if(unicode)
 709                     result = es->password_char;
 710                 else
 711                 {
 712                     WCHAR charW = es->password_char;
 713                     CHAR charA = 0;
 714                     WideCharToMultiByte(CP_ACP, 0, &charW, 1, &charA, 1, NULL, NULL);
 715                     result = charA;
 716                 }
 717                 break;
 718         }
 719
 720         /* The following EM_xxx are new to win95 and don't exist for 16 bit */
 721
 722         case EM_SETMARGINS:
 723                 EDIT_EM_SetMargins(es, (INT)wParam, SLOWORD(lParam), SHIWORD(lParam));
 724                 break;
 725
 726         case EM_GETMARGINS:
 727                 result = MAKELONG(es->left_margin, es->right_margin);
 728                 break;
 729
 730         case EM_GETLIMITTEXT:
 731                 result = es->buffer_limit;
 732                 break;
 733
 734         case EM_POSFROMCHAR:
 735                 result = EDIT_EM_PosFromChar(es, (INT)wParam, FALSE);
 736                 break;
 737
 738         case EM_CHARFROMPOS:
 739                 result = EDIT_EM_CharFromPos(es, SLOWORD(lParam), SHIWORD(lParam));
 740                 break;
 741
 742         /* End of the EM_ messages which were in numerical order; what order
 743          * are these in?  vaguely alphabetical?
 744          */
 745
 746         case WM_GETDLGCODE:
 747                 result = DLGC_HASSETSEL | DLGC_WANTCHARS | DLGC_WANTARROWS;
 748
 749                 if (lParam && (((LPMSG)lParam)->message == WM_KEYDOWN))
 750                 {
 751                    int vk = (int)((LPMSG)lParam)->wParam;
 752
 753                    if (vk == VK_RETURN && (GetWindowLongW( hwnd, GWL_STYLE ) & ES_WANTRETURN))
 754                    {
 755                       result |= DLGC_WANTMESSAGE;
 756                    }
 757                    else if (es->hwndListBox && (vk == VK_RETURN || vk == VK_ESCAPE))
 758                    {
 759                       if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 760                          result |= DLGC_WANTMESSAGE;
 761                    }
 762                 }
 763                 break;
 764
 765         case WM_CHAR:
 766         {
 767                 WCHAR charW;
 768
 769                 if(unicode)
 770                     charW = wParam;
 771                 else
 772                 {
 773                     CHAR charA = wParam;
 774                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 775                 }
 776
 777                 if ((charW == VK_RETURN || charW == VK_ESCAPE) && es->hwndListBox)
 778                 {
 779                    if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 780                       SendMessageW(GetParent(hwnd), WM_KEYDOWN, charW, 0);
 781                    break;
 782                 }
 783                 EDIT_WM_Char(es, charW);
 784                 break;
 785         }
 786
 787         case WM_CLEAR:
 788                 EDIT_WM_Clear(es);
 789                 break;
 790
 791         case WM_COMMAND:
 792                 EDIT_WM_Command(es, HIWORD(wParam), LOWORD(wParam), (HWND)lParam);
 793                 break;
 794
 795         case WM_CONTEXTMENU:
 796                 EDIT_WM_ContextMenu(es, SLOWORD(lParam), SHIWORD(lParam));
 797                 break;
 798
 799         case WM_COPY:
 800                 EDIT_WM_Copy(es);
 801                 break;
 802
 803         case WM_CREATE:
 804                 if(unicode)
 805                     result = EDIT_WM_Create(es, ((LPCREATESTRUCTW)lParam)->lpszName);
 806                 else
 807                 {
 808                     LPCSTR nameA = ((LPCREATESTRUCTA)lParam)->lpszName;
 809                     LPWSTR nameW = NULL;
 810                     if(nameA)
 811                     {
 812                         INT countW = MultiByteToWideChar(CP_ACP, 0, nameA, -1, NULL, 0);
 813                         if((nameW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 814                             MultiByteToWideChar(CP_ACP, 0, nameA, -1, nameW, countW);
 815                     }
 816                     result = EDIT_WM_Create(es, nameW);
 817                     if(nameW)
 818                         HeapFree(GetProcessHeap(), 0, nameW);
 819                 }
 820                 break;
 821
 822         case WM_CUT:
 823                 EDIT_WM_Cut(es);
 824                 break;
 825
 826         case WM_ENABLE:
 827                 es->bEnableState = (BOOL) wParam;
 828                 EDIT_UpdateText(es, NULL, TRUE);
 829                 break;
 830
 831         case WM_ERASEBKGND:
 832                 result = EDIT_WM_EraseBkGnd(es, (HDC)wParam);
 833                 break;
 834
 835         case WM_GETFONT:
 836                 result = (LRESULT)es->font;
 837                 break;
 838
 839         case WM_GETTEXT:
 840                 result = (LRESULT)EDIT_WM_GetText(es, (INT)wParam, lParam, unicode);
 841                 break;
 842
 843         case WM_GETTEXTLENGTH:
 844                 if (unicode) result = strlenW(es->text);
 845                 else result = WideCharToMultiByte( CP_ACP, 0, es->text, strlenW(es->text),
 846                                                    NULL, 0, NULL, NULL );
 847                 break;
 848
 849         case WM_HSCROLL:
 850                 result = EDIT_WM_HScroll(es, LOWORD(wParam), SHIWORD(wParam));
 851                 break;
 852
 853         case WM_KEYDOWN:
 854                 result = EDIT_WM_KeyDown(es, (INT)wParam);
 855                 break;
 856
 857         case WM_KILLFOCUS:
 858                 result = EDIT_WM_KillFocus(es);
 859                 break;
 860
 861         case WM_LBUTTONDBLCLK:
 862                 result = EDIT_WM_LButtonDblClk(es);
 863                 break;
 864
 865         case WM_LBUTTONDOWN:
 866                 result = EDIT_WM_LButtonDown(es, (DWORD)wParam, SLOWORD(lParam), SHIWORD(lParam));
 867                 break;
 868
 869         case WM_LBUTTONUP:
 870                 result = EDIT_WM_LButtonUp(es);
 871                 break;
 872
 873         case WM_MBUTTONDOWN:
 874                 result = EDIT_WM_MButtonDown(es);
 875                 break;
 876
 877         case WM_MOUSEACTIVATE:
 878                 /*
 879                  *      FIXME: maybe DefWindowProc() screws up, but it seems that
 880                  *              modeless dialog boxes need this.  If we don't do this, the focus
 881                  *              will _not_ be set by DefWindowProc() for edit controls in a
 882                  *              modeless dialog box ???
 883                  */
 884                 SetFocus(hwnd);
 885                 result = MA_ACTIVATE;
 886                 break;
 887
 888         case WM_MOUSEMOVE:
 889                 result = EDIT_WM_MouseMove(es, SLOWORD(lParam), SHIWORD(lParam));
 890                 break;
 891
 892         case WM_PAINT:
 893                 EDIT_WM_Paint(es, wParam);
 894                 break;
 895
 896         case WM_PASTE:
 897                 EDIT_WM_Paste(es);
 898                 break;
 899
 900         case WM_SETFOCUS:
 901                 EDIT_WM_SetFocus(es);
 902                 break;
 903
 904         case WM_SETFONT:
 905                 EDIT_WM_SetFont(es, (HFONT)wParam, LOWORD(lParam) != 0);
 906                 break;
 907
 908         case WM_SETREDRAW:
 909                 /* FIXME: actually set an internal flag and behave accordingly */
 910                 break;
 911
 912         case WM_SETTEXT:
 913                 EDIT_WM_SetText(es, lParam, unicode);
 914                 result = TRUE;
 915                 break;
 916
 917         case WM_SIZE:
 918                 EDIT_WM_Size(es, (UINT)wParam, LOWORD(lParam), HIWORD(lParam));
 919                 break;
 920
 921         case WM_STYLECHANGED:
 922                 result = EDIT_WM_StyleChanged(es, wParam, (const STYLESTRUCT *)lParam);
 923                 break;
 924
 925         case WM_STYLECHANGING:
 926                 result = 0; /* See EDIT_WM_StyleChanged */
 927                 break;
 928
 929         case WM_SYSKEYDOWN:
 930                 result = EDIT_WM_SysKeyDown(es, (INT)wParam, (DWORD)lParam);
 931                 break;
 932
 933         case WM_TIMER:
 934                 EDIT_WM_Timer(es);
 935                 break;
 936
 937         case WM_VSCROLL:
 938                 result = EDIT_WM_VScroll(es, LOWORD(wParam), SHIWORD(wParam));
 939                 break;
 940
 941         case WM_MOUSEWHEEL:
 942                 {
 943                     int gcWheelDelta = 0;
 944                     UINT pulScrollLines = 3;
 945                     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
 946
 947                     if (wParam & (MK_SHIFT | MK_CONTROL)) {
 948                         result = DefWindowProcW(hwnd, msg, wParam, lParam);
 949                         break;
 950                     }
 951                     gcWheelDelta -= SHIWORD(wParam);
 952                     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
 953                     {
 954                         int cLineScroll= (int) min((UINT) es->line_count, pulScrollLines);
 955                         cLineScroll *= (gcWheelDelta / WHEEL_DELTA);
 956                         result = EDIT_EM_LineScroll(es, 0, cLineScroll);
 957                     }
 958                 }
 959                 break;
 960         default:
 961                 result = DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
 962                 break;
 963         }
 964
 965         if (es) EDIT_UnlockBuffer(es, FALSE);
 966
 967         return result;
 968 }
 969
 970 /*********************************************************************
 971  *
 972  *      EditWndProcW   (USER32.@)
 973  */
 974 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 975 {
 976     return EditWndProc_common(hWnd, uMsg, wParam, lParam, TRUE);
 977 }
 978
 979 /*********************************************************************
 980  *
 981  *      EditWndProc   (USER32.@)
 982  */
 983 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 984 {
 985     return EditWndProc_common(hWnd, uMsg, wParam, lParam, FALSE);
 986 }
 987
 988 /*********************************************************************
 989  *
 990  *      EDIT_BuildLineDefs_ML
 991  *
 992  *      Build linked list of text lines.
 993  *      Lines can end with '\0' (last line), a character (if it is wrapped),
 994  *      a soft return '\r\r\n' or a hard return '\r\n'
 995  *
 996  */
 997 static void EDIT_BuildLineDefs_ML(EDITSTATE *es, INT istart, INT iend, INT delta, HRGN hrgn)
 998 {
 999         HDC dc;
1000         HFONT old_font = 0;
1001         LPWSTR current_position, cp;
1002         INT fw;
1003         LINEDEF *current_line;
1004         LINEDEF *previous_line;
1005         LINEDEF *start_line;
1006         INT line_index = 0, nstart_line = 0, nstart_index = 0;
1007         INT line_count = es->line_count;
1008         INT orig_net_length;
1009         RECT rc;
1010
1011         if (istart == iend && delta == 0)
1012                 return;
1013
1014         dc = GetDC(es->hwndSelf);
1015         if (es->font)
1016                 old_font = SelectObject(dc, es->font);
1017
1018         previous_line = NULL;
1019         current_line = es->first_line_def;
1020
1021         /* Find starting line. istart must lie inside an existing line or
1022          * at the end of buffer */
1023         do {
1024                 if (istart < current_line->index + current_line->length ||
1025                                 current_line->ending == END_0)
1026                         break;
1027
1028                 previous_line = current_line;
1029                 current_line = current_line->next;
1030                 line_index++;
1031         } while (current_line);
1032
1033         if (!current_line) /* Error occurred start is not inside previous buffer */
1034         {
1035                 FIXME(" modification occurred outside buffer\n");
1036                 ReleaseDC(es->hwndSelf, dc);
1037                 return;
1038         }
1039
1040         /* Remember start of modifications in order to calculate update region */
1041         nstart_line = line_index;
1042         nstart_index = current_line->index;
1043
1044         /* We must start to reformat from the previous line since the modifications
1045          * may have caused the line to wrap upwards. */
1046         if (!(es->style & ES_AUTOHSCROLL) && line_index > 0)
1047         {
1048                 line_index--;
1049                 current_line = previous_line;
1050         }
1051         start_line = current_line;
1052
1053         fw = es->format_rect.right - es->format_rect.left;
1054         current_position = es->text + current_line->index;
1055         do {
1056                 if (current_line != start_line)
1057                 {
1058                         if (!current_line || current_line->index + delta > current_position - es->text)
1059                         {
1060                                 /* The buffer has been expanded, create a new line and
1061                                    insert it into the link list */
1062                                 LINEDEF *new_line = HeapAlloc(GetProcessHeap(), 0, sizeof(LINEDEF));
1063                                 new_line->next = previous_line->next;
1064                                 previous_line->next = new_line;
1065                                 current_line = new_line;
1066                                 es->line_count++;
1067                         }
1068                         else if (current_line->index + delta < current_position - es->text)
1069                         {
1070                                 /* The previous line merged with this line so we delete this extra entry */
1071                                 previous_line->next = current_line->next;
1072                                 HeapFree(GetProcessHeap(), 0, current_line);
1073                                 current_line = previous_line->next;
1074                                 es->line_count--;
1075                                 continue;
1076                         }
1077                         else /* current_line->index + delta == current_position */
1078                         {
1079                                 if (current_position - es->text > iend)
1080                                         break; /* We reached end of line modifications */
1081                                 /* else recalulate this line */
1082                         }
1083                 }
1084
1085                 current_line->index = current_position - es->text;
1086                 orig_net_length = current_line->net_length;
1087
1088                 /* Find end of line */
1089                 cp = current_position;
1090                 while (*cp) {
1091                     if (*cp == '\n') break;
1092                         if ((*cp == '\r') && (*(cp + 1) == '\n'))
1093                                 break;
1094                         cp++;
1095                 }
1096
1097                 /* Mark type of line termination */
1098                 if (!(*cp)) {
1099                         current_line->ending = END_0;
1100                         current_line->net_length = strlenW(current_position);
1101                 } else if ((cp > current_position) && (*(cp - 1) == '\r')) {
1102                         current_line->ending = END_SOFT;
1103                         current_line->net_length = cp - current_position - 1;
1104                 } else if (*cp == '\n') {
1105                         current_line->ending = END_RICH;
1106                         current_line->net_length = cp - current_position;
1107                 } else {
1108                         current_line->ending = END_HARD;
1109                         current_line->net_length = cp - current_position;
1110                 }
1111
1112                 /* Calculate line width */
1113                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1114                                         current_position, current_line->net_length,
1115                                         es->tabs_count, es->tabs));
1116
1117                 /* FIXME: check here for lines that are too wide even in AUTOHSCROLL (> 32767 ???) */
1118                 if ((!(es->style & ES_AUTOHSCROLL)) && (current_line->width > fw)) {
1119                         INT next = 0;
1120                         INT prev;
1121                         do {
1122                                 prev = next;
1123                                 next = EDIT_CallWordBreakProc(es, current_position - es->text,
1124                                                 prev + 1, current_line->net_length, WB_RIGHT);
1125                                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1126                                                         current_position, next, es->tabs_count, es->tabs));
1127                         } while (current_line->width <= fw);
1128                         if (!prev) { /* Didn't find a line break so force a break */
1129                                 next = 0;
1130                                 do {
1131                                         prev = next;
1132                                         next++;
1133                                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1134                                                                 current_position, next, es->tabs_count, es->tabs));
1135                                 } while (current_line->width <= fw);
1136                                 if (!prev)
1137                                         prev = 1;
1138                         }
1139
1140                         /* If the first line we are calculating, wrapped before istart, we must
1141                          * adjust istart in order for this to be reflected in the update region. */
1142                         if (current_line->index == nstart_index && istart > current_line->index + prev)
1143                                 istart = current_line->index + prev;
1144                         /* else if we are updating the previous line before the first line we
1145                          * are re-calculating and it expanded */
1146                         else if (current_line == start_line &&
1147                                         current_line->index != nstart_index && orig_net_length < prev)
1148                         {
1149                           /* Line expanded due to an upwards line wrap so we must partially include
1150                            * previous line in update region */
1151                                 nstart_line = line_index;
1152                                 nstart_index = current_line->index;
1153                                 istart = current_line->index + orig_net_length;
1154                         }
1155
1156                         current_line->net_length = prev;
1157                         current_line->ending = END_WRAP;
1158                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc, current_position,
1159                                         current_line->net_length, es->tabs_count, es->tabs));
1160                 }
1161
1162
1163                 /* Adjust length to include line termination */
1164                 switch (current_line->ending) {
1165                 case END_SOFT:
1166                         current_line->length = current_line->net_length + 3;
1167                         break;
1168                 case END_RICH:
1169                         current_line->length = current_line->net_length + 1;
1170                         break;
1171                 case END_HARD:
1172                         current_line->length = current_line->net_length + 2;
1173                         break;
1174                 case END_WRAP:
1175                 case END_0:
1176                         current_line->length = current_line->net_length;
1177                         break;
1178                 }
1179                 es->text_width = max(es->text_width, current_line->width);
1180                 current_position += current_line->length;
1181                 previous_line = current_line;
1182                 current_line = current_line->next;
1183                 line_index++;
1184         } while (previous_line->ending != END_0);
1185
1186         /* Finish adjusting line indexes by delta or remove hanging lines */
1187         if (previous_line->ending == END_0)
1188         {
1189                 LINEDEF *pnext = NULL;
1190
1191                 previous_line->next = NULL;
1192                 while (current_line)
1193                 {
1194                         pnext = current_line->next;
1195                         HeapFree(GetProcessHeap(), 0, current_line);
1196                         current_line = pnext;
1197                         es->line_count--;
1198                 }
1199         }
1200         else
1201         {
1202                 while (current_line)
1203                 {
1204                         current_line->index += delta;
1205                         current_line = current_line->next;
1206                 }
1207         }
1208
1209         /* Calculate rest of modification rectangle */
1210         if (hrgn)
1211         {
1212                 HRGN tmphrgn;
1213            /*
1214                 * We calculate two rectangles. One for the first line which may have
1215                 * an indent with respect to the format rect. The other is a format-width
1216                 * rectangle that spans the rest of the lines that changed or moved.
1217                 */
1218                 rc.top = es->format_rect.top + nstart_line * es->line_height -
1219                         (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1220                 rc.bottom = rc.top + es->line_height;
1221                 rc.left = es->format_rect.left + (INT)LOWORD(GetTabbedTextExtentW(dc,
1222                                         es->text + nstart_index, istart - nstart_index,
1223                                         es->tabs_count, es->tabs)) - es->x_offset; /* Adjust for horz scroll */
1224                 rc.right = es->format_rect.right;
1225                 SetRectRgn(hrgn, rc.left, rc.top, rc.right, rc.bottom);
1226
1227                 rc.top = rc.bottom;
1228                 rc.left = es->format_rect.left;
1229                 rc.right = es->format_rect.right;
1230            /*
1231                 * If lines were added or removed we must re-paint the remainder of the
1232             * lines since the remaining lines were either shifted up or down.
1233                 */
1234                 if (line_count < es->line_count) /* We added lines */
1235                         rc.bottom = es->line_count * es->line_height;
1236                 else if (line_count > es->line_count) /* We removed lines */
1237                         rc.bottom = line_count * es->line_height;
1238                 else
1239                         rc.bottom = line_index * es->line_height;
1240                 rc.bottom -= (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1241                 tmphrgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
1242                 CombineRgn(hrgn, hrgn, tmphrgn, RGN_OR);
1243                 DeleteObject(tmphrgn);
1244         }
1245
1246         if (es->font)
1247                 SelectObject(dc, old_font);
1248
1249         ReleaseDC(es->hwndSelf, dc);
1250 }
1251
1252 /*********************************************************************
1253  *
1254  *      EDIT_CalcLineWidth_SL
1255  *
1256  */
1257 static void EDIT_CalcLineWidth_SL(EDITSTATE *es)
1258 {
1259     es->text_width = SLOWORD(EDIT_EM_PosFromChar(es, strlenW(es->text), FALSE));
1260 }
1261
1262 /*********************************************************************
1263  *
1264  *      EDIT_CallWordBreakProc
1265  *
1266  *      Call appropriate WordBreakProc (internal or external).
1267  *
1268  *      Note: The "start" argument should always be an index referring
1269  *              to es->text.  The actual wordbreak proc might be
1270  *              16 bit, so we can't always pass any 32 bit LPSTR.
1271  *              Hence we assume that es->text is the buffer that holds
1272  *              the string under examination (we can decide this for ourselves).
1273  *
1274  */
1275 static INT EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action)
1276 {
1277     INT ret, iWndsLocks;
1278
1279     /* To avoid any deadlocks, all the locks on the window structures
1280        must be suspended before the control is passed to the application */
1281     iWndsLocks = WIN_SuspendWndsLock();
1282
1283         if (es->word_break_proc16) {
1284             HGLOBAL16 hglob16;
1285             SEGPTR segptr;
1286             INT countA;
1287             WORD args[5];
1288             DWORD result;
1289
1290             countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1291             hglob16 = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT, countA);
1292             segptr = K32WOWGlobalLock16(hglob16);
1293             WideCharToMultiByte(CP_ACP, 0, es->text + start, count, MapSL(segptr), countA, NULL, NULL);
1294             args[4] = SELECTOROF(segptr);
1295             args[3] = OFFSETOF(segptr);
1296             args[2] = index;
1297             args[1] = countA;
1298             args[0] = action;
1299             WOWCallback16Ex((DWORD)es->word_break_proc16, WCB16_PASCAL, sizeof(args), args, &result);
1300             ret = LOWORD(result);
1301             GlobalUnlock16(hglob16);
1302             GlobalFree16(hglob16);
1303         }
1304         else if (es->word_break_proc)
1305         {
1306             if(es->is_unicode)
1307             {
1308                 EDITWORDBREAKPROCW wbpW = (EDITWORDBREAKPROCW)es->word_break_proc;
1309
1310                 TRACE_(relay)("(UNICODE wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1311                         es->word_break_proc, debugstr_wn(es->text + start, count), index, count, action);
1312                 ret = wbpW(es->text + start, index, count, action);
1313             }
1314             else
1315             {
1316                 EDITWORDBREAKPROCA wbpA = (EDITWORDBREAKPROCA)es->word_break_proc;
1317                 INT countA;
1318                 CHAR *textA;
1319
1320                 countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1321                 textA = HeapAlloc(GetProcessHeap(), 0, countA);
1322                 WideCharToMultiByte(CP_ACP, 0, es->text + start, count, textA, countA, NULL, NULL);
1323                 TRACE_(relay)("(ANSI wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1324                         es->word_break_proc, debugstr_an(textA, countA), index, countA, action);
1325                 ret = wbpA(textA, index, countA, action);
1326                 HeapFree(GetProcessHeap(), 0, textA);
1327             }
1328         }
1329         else
1330             ret = EDIT_WordBreakProc(es->text + start, index, count, action);
1331
1332     WIN_RestoreWndsLock(iWndsLocks);
1333     return ret;
1334 }
1335
1336
1337 /*********************************************************************
1338  *
1339  *      EDIT_CharFromPos
1340  *
1341  *      Beware: This is not the function called on EM_CHARFROMPOS
1342  *              The position _can_ be outside the formatting / client
1343  *              rectangle
1344  *              The return value is only the character index
1345  *
1346  */
1347 static INT EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap)
1348 {
1349         INT index;
1350         HDC dc;
1351         HFONT old_font = 0;
1352
1353         if (es->style & ES_MULTILINE) {
1354                 INT line = (y - es->format_rect.top) / es->line_height + es->y_offset;
1355                 INT line_index = 0;
1356                 LINEDEF *line_def = es->first_line_def;
1357                 INT low, high;
1358                 while ((line > 0) && line_def->next) {
1359                         line_index += line_def->length;
1360                         line_def = line_def->next;
1361                         line--;
1362                 }
1363                 x += es->x_offset - es->format_rect.left;
1364                 if (x >= line_def->width) {
1365                         if (after_wrap)
1366                                 *after_wrap = (line_def->ending == END_WRAP);
1367                         return line_index + line_def->net_length;
1368                 }
1369                 if (x <= 0) {
1370                         if (after_wrap)
1371                                 *after_wrap = FALSE;
1372                         return line_index;
1373                 }
1374                 dc = GetDC(es->hwndSelf);
1375                 if (es->font)
1376                         old_font = SelectObject(dc, es->font);
1377                     low = line_index + 1;
1378                     high = line_index + line_def->net_length + 1;
1379                     while (low < high - 1)
1380                     {
1381                         INT mid = (low + high) / 2;
1382                         if (LOWORD(GetTabbedTextExtentW(dc, es->text + line_index,mid - line_index, es->tabs_count, es->tabs)) > x) high = mid;
1383                         else low = mid;
1384                     }
1385                     index = low;
1386
1387                 if (after_wrap)
1388                         *after_wrap = ((index == line_index + line_def->net_length) &&
1389                                                         (line_def->ending == END_WRAP));
1390         } else {
1391                 LPWSTR text;
1392                 SIZE size;
1393                 if (after_wrap)
1394                         *after_wrap = FALSE;
1395                 x -= es->format_rect.left;
1396                 if (!x)
1397                         return es->x_offset;
1398                 text = EDIT_GetPasswordPointer_SL(es);
1399                 dc = GetDC(es->hwndSelf);
1400                 if (es->font)
1401                         old_font = SelectObject(dc, es->font);
1402                 if (x < 0)
1403                 {
1404                     INT low = 0;
1405                     INT high = es->x_offset;
1406                     while (low < high - 1)
1407                     {
1408                         INT mid = (low + high) / 2;
1409                         GetTextExtentPoint32W( dc, text + mid,
1410                                                es->x_offset - mid, &size );
1411                         if (size.cx > -x) low = mid;
1412                         else high = mid;
1413                     }
1414                     index = low;
1415                 }
1416                 else
1417                 {
1418                     INT low = es->x_offset;
1419                     INT high = strlenW(es->text) + 1;
1420                     while (low < high - 1)
1421                     {
1422                         INT mid = (low + high) / 2;
1423                         GetTextExtentPoint32W( dc, text + es->x_offset,
1424                                                mid - es->x_offset, &size );
1425                         if (size.cx > x) high = mid;
1426                         else low = mid;
1427                     }
1428                     index = low;
1429                 }
1430                 if (es->style & ES_PASSWORD)
1431                         HeapFree(GetProcessHeap(), 0, text);
1432         }
1433         if (es->font)
1434                 SelectObject(dc, old_font);
1435         ReleaseDC(es->hwndSelf, dc);
1436         return index;
1437 }
1438
1439
1440 /*********************************************************************
1441  *
1442  *      EDIT_ConfinePoint
1443  *
1444  *      adjusts the point to be within the formatting rectangle
1445  *      (so CharFromPos returns the nearest _visible_ character)
1446  *
1447  */
1448 static void EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y)
1449 {
1450         *x = min(max(*x, es->format_rect.left), es->format_rect.right - 1);
1451         *y = min(max(*y, es->format_rect.top), es->format_rect.bottom - 1);
1452 }
1453
1454
1455 /*********************************************************************
1456  *
1457  *      EDIT_GetLineRect
1458  *
1459  *      Calculates the bounding rectangle for a line from a starting
1460  *      column to an ending column.
1461  *
1462  */
1463 static void EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc)
1464 {
1465         INT line_index =  EDIT_EM_LineIndex(es, line);
1466
1467         if (es->style & ES_MULTILINE)
1468                 rc->top = es->format_rect.top + (line - es->y_offset) * es->line_height;
1469         else
1470                 rc->top = es->format_rect.top;
1471         rc->bottom = rc->top + es->line_height;
1472         rc->left = (scol == 0) ? es->format_rect.left : SLOWORD(EDIT_EM_PosFromChar(es, line_index + scol, TRUE));
1473         rc->right = (ecol == -1) ? es->format_rect.right : SLOWORD(EDIT_EM_PosFromChar(es, line_index + ecol, TRUE));
1474 }
1475
1476
1477 /*********************************************************************
1478  *
1479  *      EDIT_GetPasswordPointer_SL
1480  *
1481  *      note: caller should free the (optionally) allocated buffer
1482  *
1483  */
1484 static LPWSTR EDIT_GetPasswordPointer_SL(EDITSTATE *es)
1485 {
1486         if (es->style & ES_PASSWORD) {
1487                 INT len = strlenW(es->text);
1488                 LPWSTR text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
1489                 text[len] = '\0';
1490                 while(len) text[--len] = es->password_char;
1491                 return text;
1492         } else
1493                 return es->text;
1494 }
1495
1496
1497 /*********************************************************************
1498  *
1499  *      EDIT_LockBuffer
1500  *
1501  *      This acts as a LOCAL_Lock(), but it locks only once.  This way
1502  *      you can call it whenever you like, without unlocking.
1503  *
1504  *      Initially the edit control allocates a HLOCAL32 buffer
1505  *      (32 bit linear memory handler).  However, 16 bit application
1506  *      might send a EM_GETHANDLE message and expect a HLOCAL16 (16 bit SEG:OFF
1507  *      handler).  From that moment on we have to keep using this 16 bit memory
1508  *      handler, because it is supposed to be valid at all times after EM_GETHANDLE.
1509  *      What we do is create a HLOCAL16 buffer, copy the text, and do pointer
1510  *      conversion.
1511  *
1512  */
1513 static void EDIT_LockBuffer(EDITSTATE *es)
1514 {
1515         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
1516         if (!es->text) {
1517             CHAR *textA = NULL;
1518             UINT countA = 0;
1519             BOOL _16bit = FALSE;
1520
1521             if(es->hloc32W)
1522             {
1523                 if(es->hloc32A)
1524                 {
1525                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
1526                     textA = LocalLock(es->hloc32A);
1527                     countA = strlen(textA) + 1;
1528                 }
1529                 else if(es->hloc16)
1530                 {
1531                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
1532                     textA = LOCAL_Lock(hInstance, es->hloc16);
1533                     countA = strlen(textA) + 1;
1534                     _16bit = TRUE;
1535                 }
1536             }
1537             else {
1538                 ERR("no buffer ... please report\n");
1539                 return;
1540             }
1541
1542             if(textA)
1543             {
1544                 HLOCAL hloc32W_new;
1545                 UINT countW_new = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
1546                 TRACE("%d bytes translated to %d WCHARs\n", countA, countW_new);
1547                 if(countW_new > es->buffer_size + 1)
1548                 {
1549                     UINT alloc_size = ROUND_TO_GROW(countW_new * sizeof(WCHAR));
1550                     TRACE("Resizing 32-bit UNICODE buffer from %d+1 to %d WCHARs\n", es->buffer_size, countW_new);
1551                     hloc32W_new = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
1552                     if(hloc32W_new)
1553                     {
1554                         es->hloc32W = hloc32W_new;
1555                         es->buffer_size = LocalSize(hloc32W_new)/sizeof(WCHAR) - 1;
1556                         TRACE("Real new size %d+1 WCHARs\n", es->buffer_size);
1557                     }
1558                     else
1559                         WARN("FAILED! Will synchronize partially\n");
1560                 }
1561             }
1562
1563             /*TRACE("Locking 32-bit UNICODE buffer\n");*/
1564             es->text = LocalLock(es->hloc32W);
1565
1566             if(textA)
1567             {
1568                 MultiByteToWideChar(CP_ACP, 0, textA, countA, es->text, es->buffer_size + 1);
1569                 if(_16bit)
1570                     LOCAL_Unlock(hInstance, es->hloc16);
1571                 else
1572                     LocalUnlock(es->hloc32A);
1573             }
1574         }
1575         es->lock_count++;
1576 }
1577
1578
1579 /*********************************************************************
1580  *
1581  *      EDIT_SL_InvalidateText
1582  *
1583  *      Called from EDIT_InvalidateText().
1584  *      Does the job for single-line controls only.
1585  *
1586  */
1587 static void EDIT_SL_InvalidateText(EDITSTATE *es, INT start, INT end)
1588 {
1589         RECT line_rect;
1590         RECT rc;
1591
1592         EDIT_GetLineRect(es, 0, start, end, &line_rect);
1593         if (IntersectRect(&rc, &line_rect, &es->format_rect))
1594                 EDIT_UpdateText(es, &rc, TRUE);
1595 }
1596
1597
1598 /*********************************************************************
1599  *
1600  *      EDIT_ML_InvalidateText
1601  *
1602  *      Called from EDIT_InvalidateText().
1603  *      Does the job for multi-line controls only.
1604  *
1605  */
1606 static void EDIT_ML_InvalidateText(EDITSTATE *es, INT start, INT end)
1607 {
1608         INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
1609         INT sl = EDIT_EM_LineFromChar(es, start);
1610         INT el = EDIT_EM_LineFromChar(es, end);
1611         INT sc;
1612         INT ec;
1613         RECT rc1;
1614         RECT rcWnd;
1615         RECT rcLine;
1616         RECT rcUpdate;
1617         INT l;
1618
1619         if ((el < es->y_offset) || (sl > es->y_offset + vlc))
1620                 return;
1621
1622         sc = start - EDIT_EM_LineIndex(es, sl);
1623         ec = end - EDIT_EM_LineIndex(es, el);
1624         if (sl < es->y_offset) {
1625                 sl = es->y_offset;
1626                 sc = 0;
1627         }
1628         if (el > es->y_offset + vlc) {
1629                 el = es->y_offset + vlc;
1630                 ec = EDIT_EM_LineLength(es, EDIT_EM_LineIndex(es, el));
1631         }
1632         GetClientRect(es->hwndSelf, &rc1);
1633         IntersectRect(&rcWnd, &rc1, &es->format_rect);
1634         if (sl == el) {
1635                 EDIT_GetLineRect(es, sl, sc, ec, &rcLine);
1636                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1637                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1638         } else {
1639                 EDIT_GetLineRect(es, sl, sc,
1640                                 EDIT_EM_LineLength(es,
1641                                         EDIT_EM_LineIndex(es, sl)),
1642                                 &rcLine);
1643                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1644                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1645                 for (l = sl + 1 ; l < el ; l++) {
1646                         EDIT_GetLineRect(es, l, 0,
1647                                 EDIT_EM_LineLength(es,
1648                                         EDIT_EM_LineIndex(es, l)),
1649                                 &rcLine);
1650                         if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1651                                 EDIT_UpdateText(es, &rcUpdate, TRUE);
1652                 }
1653                 EDIT_GetLineRect(es, el, 0, ec, &rcLine);
1654                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1655                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1656         }
1657 }
1658
1659
1660 /*********************************************************************
1661  *
1662  *      EDIT_InvalidateText
1663  *
1664  *      Invalidate the text from offset start upto, but not including,
1665  *      offset end.  Useful for (re)painting the selection.
1666  *      Regions outside the linewidth are not invalidated.
1667  *      end == -1 means end == TextLength.
1668  *      start and end need not be ordered.
1669  *
1670  */
1671 static void EDIT_InvalidateText(EDITSTATE *es, INT start, INT end)
1672 {
1673         if (end == start)
1674                 return;
1675
1676         if (end == -1)
1677                 end = strlenW(es->text);
1678
1679         if (end < start) {
1680             INT tmp = start;
1681             start = end;
1682             end = tmp;
1683         }
1684
1685         if (es->style & ES_MULTILINE)
1686                 EDIT_ML_InvalidateText(es, start, end);
1687         else
1688                 EDIT_SL_InvalidateText(es, start, end);
1689 }
1690
1691
1692 /*********************************************************************
1693  *
1694  *      EDIT_MakeFit
1695  *
1696  * Try to fit size + 1 characters in the buffer.
1697  * Constrain to limits if honor_limit is TRUE.
1698  */
1699 static BOOL EDIT_MakeFit(EDITSTATE *es, UINT size, BOOL honor_limit)
1700 {
1701         HLOCAL hNew32W;
1702
1703         if ((honor_limit) && (es->buffer_limit > 0) && (size > es->buffer_limit)) {
1704                 EDIT_NOTIFY_PARENT(es, EN_MAXTEXT, "EN_MAXTEXT");
1705                 return FALSE;
1706         }
1707
1708         if (size <= es->buffer_size)
1709                 return TRUE;
1710
1711         TRACE("trying to ReAlloc to %d+1 characters\n", size);
1712
1713         /* Force edit to unlock it's buffer. es->text now NULL */
1714         EDIT_UnlockBuffer(es, TRUE);
1715
1716         if (es->hloc32W) {
1717             UINT alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1718             if ((hNew32W = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT))) {
1719                 TRACE("Old 32 bit handle %p, new handle %p\n", es->hloc32W, hNew32W);
1720                 es->hloc32W = hNew32W;
1721                 es->buffer_size = LocalSize(hNew32W)/sizeof(WCHAR) - 1;
1722             }
1723         }
1724
1725         EDIT_LockBuffer(es);
1726
1727         if (es->buffer_size < size) {
1728                 WARN("FAILED !  We now have %d+1\n", es->buffer_size);
1729                 EDIT_NOTIFY_PARENT(es, EN_ERRSPACE, "EN_ERRSPACE");
1730                 return FALSE;
1731         } else {
1732                 TRACE("We now have %d+1\n", es->buffer_size);
1733                 return TRUE;
1734         }
1735 }
1736
1737
1738 /*********************************************************************
1739  *
1740  *      EDIT_MakeUndoFit
1741  *
1742  *      Try to fit size + 1 bytes in the undo buffer.
1743  *
1744  */
1745 static BOOL EDIT_MakeUndoFit(EDITSTATE *es, UINT size)
1746 {
1747         UINT alloc_size;
1748
1749         if (size <= es->undo_buffer_size)
1750                 return TRUE;
1751
1752         TRACE("trying to ReAlloc to %d+1\n", size);
1753
1754         alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1755         if ((es->undo_text = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, es->undo_text, alloc_size))) {
1756                 es->undo_buffer_size = alloc_size/sizeof(WCHAR) - 1;
1757                 return TRUE;
1758         }
1759         else
1760         {
1761                 WARN("FAILED !  We now have %d+1\n", es->undo_buffer_size);
1762                 return FALSE;
1763         }
1764 }
1765
1766
1767 /*********************************************************************
1768  *
1769  *      EDIT_MoveBackward
1770  *
1771  */
1772 static void EDIT_MoveBackward(EDITSTATE *es, BOOL extend)
1773 {
1774         INT e = es->selection_end;
1775
1776         if (e) {
1777                 e--;
1778                 if ((es->style & ES_MULTILINE) && e &&
1779                                 (es->text[e - 1] == '\r') && (es->text[e] == '\n')) {
1780                         e--;
1781                         if (e && (es->text[e - 1] == '\r'))
1782                                 e--;
1783                 }
1784         }
1785         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1786         EDIT_EM_ScrollCaret(es);
1787 }
1788
1789
1790 /*********************************************************************
1791  *
1792  *      EDIT_MoveDown_ML
1793  *
1794  *      Only for multi line controls
1795  *      Move the caret one line down, on a column with the nearest
1796  *      x coordinate on the screen (might be a different column).
1797  *
1798  */
1799 static void EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend)
1800 {
1801         INT s = es->selection_start;
1802         INT e = es->selection_end;
1803         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1804         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1805         INT x = SLOWORD(pos);
1806         INT y = SHIWORD(pos);
1807
1808         e = EDIT_CharFromPos(es, x, y + es->line_height, &after_wrap);
1809         if (!extend)
1810                 s = e;
1811         EDIT_EM_SetSel(es, s, e, after_wrap);
1812         EDIT_EM_ScrollCaret(es);
1813 }
1814
1815
1816 /*********************************************************************
1817  *
1818  *      EDIT_MoveEnd
1819  *
1820  */
1821 static void EDIT_MoveEnd(EDITSTATE *es, BOOL extend)
1822 {
1823         BOOL after_wrap = FALSE;
1824         INT e;
1825
1826         /* Pass a high value in x to make sure of receiving the end of the line */
1827         if (es->style & ES_MULTILINE)
1828                 e = EDIT_CharFromPos(es, 0x3fffffff,
1829                         HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), &after_wrap);
1830         else
1831                 e = strlenW(es->text);
1832         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, after_wrap);
1833         EDIT_EM_ScrollCaret(es);
1834 }
1835
1836
1837 /*********************************************************************
1838  *
1839  *      EDIT_MoveForward
1840  *
1841  */
1842 static void EDIT_MoveForward(EDITSTATE *es, BOOL extend)
1843 {
1844         INT e = es->selection_end;
1845
1846         if (es->text[e]) {
1847                 e++;
1848                 if ((es->style & ES_MULTILINE) && (es->text[e - 1] == '\r')) {
1849                         if (es->text[e] == '\n')
1850                                 e++;
1851                         else if ((es->text[e] == '\r') && (es->text[e + 1] == '\n'))
1852                                 e += 2;
1853                 }
1854         }
1855         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1856         EDIT_EM_ScrollCaret(es);
1857 }
1858
1859
1860 /*********************************************************************
1861  *
1862  *      EDIT_MoveHome
1863  *
1864  *      Home key: move to beginning of line.
1865  *
1866  */
1867 static void EDIT_MoveHome(EDITSTATE *es, BOOL extend)
1868 {
1869         INT e;
1870
1871         /* Pass the x_offset in x to make sure of receiving the first position of the line */
1872         if (es->style & ES_MULTILINE)
1873                 e = EDIT_CharFromPos(es, -es->x_offset,
1874                         HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), NULL);
1875         else
1876                 e = 0;
1877         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1878         EDIT_EM_ScrollCaret(es);
1879 }
1880
1881
1882 /*********************************************************************
1883  *
1884  *      EDIT_MovePageDown_ML
1885  *
1886  *      Only for multi line controls
1887  *      Move the caret one page down, on a column with the nearest
1888  *      x coordinate on the screen (might be a different column).
1889  *
1890  */
1891 static void EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend)
1892 {
1893         INT s = es->selection_start;
1894         INT e = es->selection_end;
1895         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1896         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1897         INT x = SLOWORD(pos);
1898         INT y = SHIWORD(pos);
1899
1900         e = EDIT_CharFromPos(es, x,
1901                 y + (es->format_rect.bottom - es->format_rect.top),
1902                 &after_wrap);
1903         if (!extend)
1904                 s = e;
1905         EDIT_EM_SetSel(es, s, e, after_wrap);
1906         EDIT_EM_ScrollCaret(es);
1907 }
1908
1909
1910 /*********************************************************************
1911  *
1912  *      EDIT_MovePageUp_ML
1913  *
1914  *      Only for multi line controls
1915  *      Move the caret one page up, on a column with the nearest
1916  *      x coordinate on the screen (might be a different column).
1917  *
1918  */
1919 static void EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend)
1920 {
1921         INT s = es->selection_start;
1922         INT e = es->selection_end;
1923         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1924         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1925         INT x = SLOWORD(pos);
1926         INT y = SHIWORD(pos);
1927
1928         e = EDIT_CharFromPos(es, x,
1929                 y - (es->format_rect.bottom - es->format_rect.top),
1930                 &after_wrap);
1931         if (!extend)
1932                 s = e;
1933         EDIT_EM_SetSel(es, s, e, after_wrap);
1934         EDIT_EM_ScrollCaret(es);
1935 }
1936
1937
1938 /*********************************************************************
1939  *
1940  *      EDIT_MoveUp_ML
1941  *
1942  *      Only for multi line controls
1943  *      Move the caret one line up, on a column with the nearest
1944  *      x coordinate on the screen (might be a different column).
1945  *
1946  */
1947 static void EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend)
1948 {
1949         INT s = es->selection_start;
1950         INT e = es->selection_end;
1951         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1952         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1953         INT x = SLOWORD(pos);
1954         INT y = SHIWORD(pos);
1955
1956         e = EDIT_CharFromPos(es, x, y - es->line_height, &after_wrap);
1957         if (!extend)
1958                 s = e;
1959         EDIT_EM_SetSel(es, s, e, after_wrap);
1960         EDIT_EM_ScrollCaret(es);
1961 }
1962
1963
1964 /*********************************************************************
1965  *
1966  *      EDIT_MoveWordBackward
1967  *
1968  */
1969 static void EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend)
1970 {
1971         INT s = es->selection_start;
1972         INT e = es->selection_end;
1973         INT l;
1974         INT ll;
1975         INT li;
1976
1977         l = EDIT_EM_LineFromChar(es, e);
1978         ll = EDIT_EM_LineLength(es, e);
1979         li = EDIT_EM_LineIndex(es, l);
1980         if (e - li == 0) {
1981                 if (l) {
1982                         li = EDIT_EM_LineIndex(es, l - 1);
1983                         e = li + EDIT_EM_LineLength(es, li);
1984                 }
1985         } else {
1986                 e = li + (INT)EDIT_CallWordBreakProc(es,
1987                                 li, e - li, ll, WB_LEFT);
1988         }
1989         if (!extend)
1990                 s = e;
1991         EDIT_EM_SetSel(es, s, e, FALSE);
1992         EDIT_EM_ScrollCaret(es);
1993 }
1994
1995
1996 /*********************************************************************
1997  *
1998  *      EDIT_MoveWordForward
1999  *
2000  */
2001 static void EDIT_MoveWordForward(EDITSTATE *es, BOOL extend)
2002 {
2003         INT s = es->selection_start;
2004         INT e = es->selection_end;
2005         INT l;
2006         INT ll;
2007         INT li;
2008
2009         l = EDIT_EM_LineFromChar(es, e);
2010         ll = EDIT_EM_LineLength(es, e);
2011         li = EDIT_EM_LineIndex(es, l);
2012         if (e - li == ll) {
2013                 if ((es->style & ES_MULTILINE) && (l != es->line_count - 1))
2014                         e = EDIT_EM_LineIndex(es, l + 1);
2015         } else {
2016                 e = li + EDIT_CallWordBreakProc(es,
2017                                 li, e - li + 1, ll, WB_RIGHT);
2018         }
2019         if (!extend)
2020                 s = e;
2021         EDIT_EM_SetSel(es, s, e, FALSE);
2022         EDIT_EM_ScrollCaret(es);
2023 }
2024
2025
2026 /*********************************************************************
2027  *
2028  *      EDIT_PaintLine
2029  *
2030  */
2031 static void EDIT_PaintLine(EDITSTATE *es, HDC dc, INT line, BOOL rev)
2032 {
2033         INT s = es->selection_start;
2034         INT e = es->selection_end;
2035         INT li;
2036         INT ll;
2037         INT x;
2038         INT y;
2039         LRESULT pos;
2040
2041         if (es->style & ES_MULTILINE) {
2042                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2043                 if ((line < es->y_offset) || (line > es->y_offset + vlc) || (line >= es->line_count))
2044                         return;
2045         } else if (line)
2046                 return;
2047
2048         TRACE("line=%d\n", line);
2049
2050         pos = EDIT_EM_PosFromChar(es, EDIT_EM_LineIndex(es, line), FALSE);
2051         x = SLOWORD(pos);
2052         y = SHIWORD(pos);
2053         li = EDIT_EM_LineIndex(es, line);
2054         ll = EDIT_EM_LineLength(es, li);
2055         s = min(es->selection_start, es->selection_end);
2056         e = max(es->selection_start, es->selection_end);
2057         s = min(li + ll, max(li, s));
2058         e = min(li + ll, max(li, e));
2059         if (rev && (s != e) &&
2060                         ((es->flags & EF_FOCUSED) || (es->style & ES_NOHIDESEL))) {
2061                 x += EDIT_PaintText(es, dc, x, y, line, 0, s - li, FALSE);
2062                 x += EDIT_PaintText(es, dc, x, y, line, s - li, e - s, TRUE);
2063                 x += EDIT_PaintText(es, dc, x, y, line, e - li, li + ll - e, FALSE);
2064         } else
2065                 x += EDIT_PaintText(es, dc, x, y, line, 0, ll, FALSE);
2066 }
2067
2068
2069 /*********************************************************************
2070  *
2071  *      EDIT_PaintText
2072  *
2073  */
2074 static INT EDIT_PaintText(EDITSTATE *es, HDC dc, INT x, INT y, INT line, INT col, INT count, BOOL rev)
2075 {
2076         COLORREF BkColor;
2077         COLORREF TextColor;
2078         INT ret;
2079         INT li;
2080         INT BkMode;
2081         SIZE size;
2082
2083         if (!count)
2084                 return 0;
2085         BkMode = GetBkMode(dc);
2086         BkColor = GetBkColor(dc);
2087         TextColor = GetTextColor(dc);
2088         if (rev) {
2089                 SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
2090                 SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
2091                 SetBkMode( dc, OPAQUE);
2092         }
2093         li = EDIT_EM_LineIndex(es, line);
2094         if (es->style & ES_MULTILINE) {
2095                 ret = (INT)LOWORD(TabbedTextOutW(dc, x, y, es->text + li + col, count,
2096                                         es->tabs_count, es->tabs, es->format_rect.left - es->x_offset));
2097         } else {
2098                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2099                 TextOutW(dc, x, y, text + li + col, count);
2100                 GetTextExtentPoint32W(dc, text + li + col, count, &size);
2101                 ret = size.cx;
2102                 if (es->style & ES_PASSWORD)
2103                         HeapFree(GetProcessHeap(), 0, text);
2104         }
2105         if (rev) {
2106                 SetBkColor(dc, BkColor);
2107                 SetTextColor(dc, TextColor);
2108                 SetBkMode( dc, BkMode);
2109         }
2110         return ret;
2111 }
2112
2113
2114 /*********************************************************************
2115  *
2116  *      EDIT_SetCaretPos
2117  *
2118  */
2119 static void EDIT_SetCaretPos(EDITSTATE *es, INT pos,
2120                              BOOL after_wrap)
2121 {
2122         LRESULT res = EDIT_EM_PosFromChar(es, pos, after_wrap);
2123         SetCaretPos(SLOWORD(res), SHIWORD(res));
2124 }
2125
2126
2127 /*********************************************************************
2128  *
2129  *      EDIT_SetRectNP
2130  *
2131  *      note:   this is not (exactly) the handler called on EM_SETRECTNP
2132  *              it is also used to set the rect of a single line control
2133  *
2134  */
2135 static void EDIT_SetRectNP(EDITSTATE *es, LPRECT rc)
2136 {
2137         CopyRect(&es->format_rect, rc);
2138         if (es->style & WS_BORDER) {
2139                 INT bw = GetSystemMetrics(SM_CXBORDER) + 1;
2140                 if(TWEAK_WineLook == WIN31_LOOK)
2141                         bw += 2;
2142                 es->format_rect.left += bw;
2143                 es->format_rect.top += bw;
2144                 es->format_rect.right -= bw;
2145                 es->format_rect.bottom -= bw;
2146         }
2147         es->format_rect.left += es->left_margin;
2148         es->format_rect.right -= es->right_margin;
2149         es->format_rect.right = max(es->format_rect.right, es->format_rect.left + es->char_width);
2150         if (es->style & ES_MULTILINE)
2151         {
2152             INT fw, vlc, max_x_offset, max_y_offset;
2153
2154             vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2155             es->format_rect.bottom = es->format_rect.top + max(1, vlc) * es->line_height;
2156
2157             /* correct es->x_offset */
2158             fw = es->format_rect.right - es->format_rect.left;
2159             max_x_offset = es->text_width - fw;
2160             if(max_x_offset < 0) max_x_offset = 0;
2161             if(es->x_offset > max_x_offset)
2162                 es->x_offset = max_x_offset;
2163
2164             /* correct es->y_offset */
2165             max_y_offset = es->line_count - vlc;
2166             if(max_y_offset < 0) max_y_offset = 0;
2167             if(es->y_offset > max_y_offset)
2168                 es->y_offset = max_y_offset;
2169
2170             /* force scroll info update */
2171             EDIT_UpdateScrollInfo(es);
2172         }
2173         else
2174         /* Windows doesn't care to fix text placement for SL controls */
2175                 es->format_rect.bottom = es->format_rect.top + es->line_height;
2176
2177         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL))
2178                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
2179 }
2180
2181
2182 /*********************************************************************
2183  *
2184  *      EDIT_UnlockBuffer
2185  *
2186  */
2187 static void EDIT_UnlockBuffer(EDITSTATE *es, BOOL force)
2188 {
2189         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
2190
2191         /* Edit window might be already destroyed */
2192         if(!IsWindow(es->hwndSelf))
2193         {
2194             WARN("edit hwnd %p already destroyed\n", es->hwndSelf);
2195             return;
2196         }
2197
2198         if (!es->lock_count) {
2199                 ERR("lock_count == 0 ... please report\n");
2200                 return;
2201         }
2202         if (!es->text) {
2203                 ERR("es->text == 0 ... please report\n");
2204                 return;
2205         }
2206
2207         if (force || (es->lock_count == 1)) {
2208             if (es->hloc32W) {
2209                 CHAR *textA = NULL;
2210                 BOOL _16bit = FALSE;
2211                 UINT countA = 0;
2212                 UINT countW = strlenW(es->text) + 1;
2213
2214                 if(es->hloc32A)
2215                 {
2216                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2217                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
2218                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2219                     countA = LocalSize(es->hloc32A);
2220                     if(countA_new > countA)
2221                     {
2222                         HLOCAL hloc32A_new;
2223                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2224                         TRACE("Resizing 32-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2225                         hloc32A_new = LocalReAlloc(es->hloc32A, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2226                         if(hloc32A_new)
2227                         {
2228                             es->hloc32A = hloc32A_new;
2229                             countA = LocalSize(hloc32A_new);
2230                             TRACE("Real new size %d bytes\n", countA);
2231                         }
2232                         else
2233                             WARN("FAILED! Will synchronize partially\n");
2234                     }
2235                     textA = LocalLock(es->hloc32A);
2236                 }
2237                 else if(es->hloc16)
2238                 {
2239                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2240                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
2241                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2242                     countA = LOCAL_Size(hInstance, es->hloc16);
2243                     if(countA_new > countA)
2244                     {
2245                         HLOCAL16 hloc16_new;
2246                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2247                         TRACE("Resizing 16-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2248                         hloc16_new = LOCAL_ReAlloc(hInstance, es->hloc16, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2249                         if(hloc16_new)
2250                         {
2251                             es->hloc16 = hloc16_new;
2252                             countA = LOCAL_Size(hInstance, hloc16_new);
2253                             TRACE("Real new size %d bytes\n", countA);
2254                         }
2255                         else
2256                             WARN("FAILED! Will synchronize partially\n");
2257                     }
2258                     textA = LOCAL_Lock(hInstance, es->hloc16);
2259                     _16bit = TRUE;
2260                 }
2261
2262                 if(textA)
2263                 {
2264                     WideCharToMultiByte(CP_ACP, 0, es->text, countW, textA, countA, NULL, NULL);
2265                     if(_16bit)
2266                         LOCAL_Unlock(hInstance, es->hloc16);
2267                     else
2268                         LocalUnlock(es->hloc32A);
2269                 }
2270
2271                 LocalUnlock(es->hloc32W);
2272                 es->text = NULL;
2273             }
2274             else {
2275                 ERR("no buffer ... please report\n");
2276                 return;
2277             }
2278         }
2279         es->lock_count--;
2280 }
2281
2282
2283 /*********************************************************************
2284  *
2285  *      EDIT_UpdateScrollInfo
2286  *
2287  */
2288 static void EDIT_UpdateScrollInfo(EDITSTATE *es)
2289 {
2290     if ((es->style & WS_VSCROLL) && !(es->flags & EF_VSCROLL_TRACK))
2291     {
2292         SCROLLINFO si;
2293         si.cbSize       = sizeof(SCROLLINFO);
2294         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2295         si.nMin         = 0;
2296         si.nMax         = es->line_count - 1;
2297         si.nPage        = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2298         si.nPos         = es->y_offset;
2299         TRACE("SB_VERT, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2300                 si.nMin, si.nMax, si.nPage, si.nPos);
2301         SetScrollInfo(es->hwndSelf, SB_VERT, &si, TRUE);
2302     }
2303
2304     if ((es->style & WS_HSCROLL) && !(es->flags & EF_HSCROLL_TRACK))
2305     {
2306         SCROLLINFO si;
2307         si.cbSize       = sizeof(SCROLLINFO);
2308         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2309         si.nMin         = 0;
2310         si.nMax         = es->text_width - 1;
2311         si.nPage        = es->format_rect.right - es->format_rect.left;
2312         si.nPos         = es->x_offset;
2313         TRACE("SB_HORZ, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2314                 si.nMin, si.nMax, si.nPage, si.nPos);
2315         SetScrollInfo(es->hwndSelf, SB_HORZ, &si, TRUE);
2316     }
2317 }
2318
2319 /*********************************************************************
2320  *
2321  *      EDIT_WordBreakProc
2322  *
2323  *      Find the beginning of words.
2324  *      Note:   unlike the specs for a WordBreakProc, this function only
2325  *              allows to be called without linebreaks between s[0] upto
2326  *              s[count - 1].  Remember it is only called
2327  *              internally, so we can decide this for ourselves.
2328  *
2329  */
2330 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action)
2331 {
2332         INT ret = 0;
2333
2334         TRACE("s=%p, index=%d, count=%d, action=%d\n", s, index, count, action);
2335
2336         if(!s) return 0;
2337
2338         switch (action) {
2339         case WB_LEFT:
2340                 if (!count)
2341                         break;
2342                 if (index)
2343                         index--;
2344                 if (s[index] == ' ') {
2345                         while (index && (s[index] == ' '))
2346                                 index--;
2347                         if (index) {
2348                                 while (index && (s[index] != ' '))
2349                                         index--;
2350                                 if (s[index] == ' ')
2351                                         index++;
2352                         }
2353                 } else {
2354                         while (index && (s[index] != ' '))
2355                                 index--;
2356                         if (s[index] == ' ')
2357                                 index++;
2358                 }
2359                 ret = index;
2360                 break;
2361         case WB_RIGHT:
2362                 if (!count)
2363                         break;
2364                 if (index)
2365                         index--;
2366                 if (s[index] == ' ')
2367                         while ((index < count) && (s[index] == ' ')) index++;
2368                 else {
2369                         while (s[index] && (s[index] != ' ') && (index < count))
2370                                 index++;
2371                         while ((s[index] == ' ') && (index < count)) index++;
2372                 }
2373                 ret = index;
2374                 break;
2375         case WB_ISDELIMITER:
2376                 ret = (s[index] == ' ');
2377                 break;
2378         default:
2379                 ERR("unknown action code, please report !\n");
2380                 break;
2381         }
2382         return ret;
2383 }
2384
2385
2386 /*********************************************************************
2387  *
2388  *      EM_CHARFROMPOS
2389  *
2390  *      returns line number (not index) in high-order word of result.
2391  *      NB : Q137805 is unclear about this. POINT * pointer in lParam apply
2392  *      to Richedit, not to the edit control. Original documentation is valid.
2393  *      FIXME: do the specs mean to return -1 if outside client area or
2394  *              if outside formatting rectangle ???
2395  *
2396  */
2397 static LRESULT EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y)
2398 {
2399         POINT pt;
2400         RECT rc;
2401         INT index;
2402
2403         pt.x = x;
2404         pt.y = y;
2405         GetClientRect(es->hwndSelf, &rc);
2406         if (!PtInRect(&rc, pt))
2407                 return -1;
2408
2409         index = EDIT_CharFromPos(es, x, y, NULL);
2410         return MAKELONG(index, EDIT_EM_LineFromChar(es, index));
2411 }
2412
2413
2414 /*********************************************************************
2415  *
2416  *      EM_FMTLINES
2417  *
2418  * Enable or disable soft breaks.
2419  *
2420  * This means: insert or remove the soft linebreak character (\r\r\n).
2421  * Take care to check if the text still fits the buffer after insertion.
2422  * If not, notify with EN_ERRSPACE.
2423  *
2424  */
2425 static BOOL EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol)
2426 {
2427         es->flags &= ~EF_USE_SOFTBRK;
2428         if (add_eol) {
2429                 es->flags |= EF_USE_SOFTBRK;
2430                 FIXME("soft break enabled, not implemented\n");
2431         }
2432         return add_eol;
2433 }
2434
2435
2436 /*********************************************************************
2437  *
2438  *      EM_GETHANDLE
2439  *
2440  *      Hopefully this won't fire back at us.
2441  *      We always start with a fixed buffer in the local heap.
2442  *      Despite of the documentation says that the local heap is used
2443  *      only if DS_LOCALEDIT flag is set, NT and 2000 always allocate
2444  *      buffer on the local heap.
2445  *
2446  */
2447 static HLOCAL EDIT_EM_GetHandle(EDITSTATE *es)
2448 {
2449         HLOCAL hLocal;
2450
2451         if (!(es->style & ES_MULTILINE))
2452                 return 0;
2453
2454         if(es->is_unicode)
2455             hLocal = es->hloc32W;
2456         else
2457         {
2458             if(!es->hloc32A)
2459             {
2460                 CHAR *textA;
2461                 UINT countA, alloc_size;
2462                 TRACE("Allocating 32-bit ANSI alias buffer\n");
2463                 countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2464                 alloc_size = ROUND_TO_GROW(countA);
2465                 if(!(es->hloc32A = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
2466                 {
2467                     ERR("Could not allocate %d bytes for 32-bit ANSI alias buffer\n", alloc_size);
2468                     return 0;
2469                 }
2470                 textA = LocalLock(es->hloc32A);
2471                 WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2472                 LocalUnlock(es->hloc32A);
2473             }
2474             hLocal = es->hloc32A;
2475         }
2476
2477         TRACE("Returning %p, LocalSize() = %ld\n", hLocal, LocalSize(hLocal));
2478         return hLocal;
2479 }
2480
2481
2482 /*********************************************************************
2483  *
2484  *      EM_GETHANDLE16
2485  *
2486  *      Hopefully this won't fire back at us.
2487  *      We always start with a buffer in 32 bit linear memory.
2488  *      However, with this message a 16 bit application requests
2489  *      a handle of 16 bit local heap memory, where it expects to find
2490  *      the text.
2491  *      It's a pitty that from this moment on we have to use this
2492  *      local heap, because applications may rely on the handle
2493  *      in the future.
2494  *
2495  *      In this function we'll try to switch to local heap.
2496  */
2497 static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es)
2498 {
2499         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
2500         CHAR *textA;
2501         UINT countA, alloc_size;
2502
2503         if (!(es->style & ES_MULTILINE))
2504                 return 0;
2505
2506         if (es->hloc16)
2507                 return es->hloc16;
2508
2509         if (!LOCAL_HeapSize(hInstance)) {
2510                 if (!LocalInit16(hInstance, 0,
2511                                 GlobalSize16(hInstance))) {
2512                         ERR("could not initialize local heap\n");
2513                         return 0;
2514                 }
2515                 TRACE("local heap initialized\n");
2516         }
2517
2518         countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2519         alloc_size = ROUND_TO_GROW(countA);
2520
2521         TRACE("Allocating 16-bit ANSI alias buffer\n");
2522         if (!(es->hloc16 = LOCAL_Alloc(hInstance, LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size))) {
2523                 ERR("could not allocate new 16 bit buffer\n");
2524                 return 0;
2525         }
2526
2527         if (!(textA = (LPSTR)LOCAL_Lock(hInstance, es->hloc16))) {
2528                 ERR("could not lock new 16 bit buffer\n");
2529                 LOCAL_Free(hInstance, es->hloc16);
2530                 es->hloc16 = 0;
2531                 return 0;
2532         }
2533
2534         WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2535         LOCAL_Unlock(hInstance, es->hloc16);
2536
2537         TRACE("Returning %04X, LocalSize() = %d\n", es->hloc16, LOCAL_Size(hInstance, es->hloc16));
2538         return es->hloc16;
2539 }
2540
2541
2542 /*********************************************************************
2543  *
2544  *      EM_GETLINE
2545  *
2546  */
2547 static INT EDIT_EM_GetLine(EDITSTATE *es, INT line, LPARAM lParam, BOOL unicode)
2548 {
2549         LPWSTR src;
2550         INT line_len, dst_len;
2551         INT i;
2552
2553         if (es->style & ES_MULTILINE) {
2554                 if (line >= es->line_count)
2555                         return 0;
2556         } else
2557                 line = 0;
2558         i = EDIT_EM_LineIndex(es, line);
2559         src = es->text + i;
2560         line_len = EDIT_EM_LineLength(es, i);
2561         dst_len = *(WORD *)lParam;
2562         if(unicode)
2563         {
2564             LPWSTR dst = (LPWSTR)lParam;
2565             if(dst_len <= line_len)
2566             {
2567                 memcpy(dst, src, dst_len * sizeof(WCHAR));
2568                 return dst_len;
2569             }
2570             else /* Append 0 if enough space */
2571             {
2572                 memcpy(dst, src, line_len * sizeof(WCHAR));
2573                 dst[line_len] = 0;
2574                 return line_len;
2575             }
2576         }
2577         else
2578         {
2579             LPSTR dst = (LPSTR)lParam;
2580             INT ret;
2581             ret = WideCharToMultiByte(CP_ACP, 0, src, line_len, dst, dst_len, NULL, NULL);
2582             if(!ret) /* Insufficient buffer size */
2583                 return dst_len;
2584             if(ret < dst_len) /* Append 0 if enough space */
2585                 dst[ret] = 0;
2586             return ret;
2587         }
2588 }
2589
2590
2591 /*********************************************************************
2592  *
2593  *      EM_GETSEL
2594  *
2595  */
2596 static LRESULT EDIT_EM_GetSel(EDITSTATE *es, PUINT start, PUINT end)
2597 {
2598         UINT s = es->selection_start;
2599         UINT e = es->selection_end;
2600
2601         ORDER_UINT(s, e);
2602         if (start)
2603                 *start = s;
2604         if (end)
2605                 *end = e;
2606         return MAKELONG(s, e);
2607 }
2608
2609
2610 /*********************************************************************
2611  *
2612  *      EM_GETTHUMB
2613  *
2614  *      FIXME: is this right ?  (or should it be only VSCROLL)
2615  *      (and maybe only for edit controls that really have their
2616  *      own scrollbars) (and maybe only for multiline controls ?)
2617  *      All in all: very poorly documented
2618  *
2619  */
2620 static LRESULT EDIT_EM_GetThumb(EDITSTATE *es)
2621 {
2622         return MAKELONG(EDIT_WM_VScroll(es, EM_GETTHUMB16, 0),
2623                 EDIT_WM_HScroll(es, EM_GETTHUMB16, 0));
2624 }
2625
2626
2627 /*********************************************************************
2628  *
2629  *      EM_LINEFROMCHAR
2630  *
2631  */
2632 static INT EDIT_EM_LineFromChar(EDITSTATE *es, INT index)
2633 {
2634         INT line;
2635         LINEDEF *line_def;
2636
2637         if (!(es->style & ES_MULTILINE))
2638                 return 0;
2639         if (index > (INT)strlenW(es->text))
2640                 return es->line_count - 1;
2641         if (index == -1)
2642                 index = min(es->selection_start, es->selection_end);
2643
2644         line = 0;
2645         line_def = es->first_line_def;
2646         index -= line_def->length;
2647         while ((index >= 0) && line_def->next) {
2648                 line++;
2649                 line_def = line_def->next;
2650                 index -= line_def->length;
2651         }
2652         return line;
2653 }
2654
2655
2656 /*********************************************************************
2657  *
2658  *      EM_LINEINDEX
2659  *
2660  */
2661 static INT EDIT_EM_LineIndex(EDITSTATE *es, INT line)
2662 {
2663         INT line_index;
2664         LINEDEF *line_def;
2665
2666         if (!(es->style & ES_MULTILINE))
2667                 return 0;
2668         if (line >= es->line_count)
2669                 return -1;
2670
2671         line_index = 0;
2672         line_def = es->first_line_def;
2673         if (line == -1) {
2674                 INT index = es->selection_end - line_def->length;
2675                 while ((index >= 0) && line_def->next) {
2676                         line_index += line_def->length;
2677                         line_def = line_def->next;
2678                         index -= line_def->length;
2679                 }
2680         } else {
2681                 while (line > 0) {
2682                         line_index += line_def->length;
2683                         line_def = line_def->next;
2684                         line--;
2685                 }
2686         }
2687         return line_index;
2688 }
2689
2690
2691 /*********************************************************************
2692  *
2693  *      EM_LINELENGTH
2694  *
2695  */
2696 static INT EDIT_EM_LineLength(EDITSTATE *es, INT index)
2697 {
2698         LINEDEF *line_def;
2699
2700         if (!(es->style & ES_MULTILINE))
2701                 return strlenW(es->text);
2702
2703         if (index == -1) {
2704                 /* get the number of remaining non-selected chars of selected lines */
2705                 INT32 l; /* line number */
2706                 INT32 li; /* index of first char in line */
2707                 INT32 count;
2708                 l = EDIT_EM_LineFromChar(es, es->selection_start);
2709                 /* # chars before start of selection area */
2710                 count = es->selection_start - EDIT_EM_LineIndex(es, l);
2711                 l = EDIT_EM_LineFromChar(es, es->selection_end);
2712                 /* # chars after end of selection */
2713                 li = EDIT_EM_LineIndex(es, l);
2714                 count += li + EDIT_EM_LineLength(es, li) - es->selection_end;
2715                 return count;
2716         }
2717         line_def = es->first_line_def;
2718         index -= line_def->length;
2719         while ((index >= 0) && line_def->next) {
2720                 line_def = line_def->next;
2721                 index -= line_def->length;
2722         }
2723         return line_def->net_length;
2724 }
2725
2726
2727 /*********************************************************************
2728  *
2729  *      EM_LINESCROLL
2730  *
2731  *      NOTE: dx is in average character widths, dy - in lines;
2732  *
2733  */
2734 static BOOL EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy)
2735 {
2736         if (!(es->style & ES_MULTILINE))
2737                 return FALSE;
2738
2739         dx *= es->char_width;
2740         return EDIT_EM_LineScroll_internal(es, dx, dy);
2741 }
2742
2743 /*********************************************************************
2744  *
2745  *      EDIT_EM_LineScroll_internal
2746  *
2747  *      Version of EDIT_EM_LineScroll for internal use.
2748  *      It doesn't refuse if ES_MULTILINE is set and assumes that
2749  *      dx is in pixels, dy - in lines.
2750  *
2751  */
2752 static BOOL EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy)
2753 {
2754         INT nyoff;
2755         INT x_offset_in_pixels;
2756
2757         if (es->style & ES_MULTILINE)
2758         {
2759             x_offset_in_pixels = es->x_offset;
2760         }
2761         else
2762         {
2763             dy = 0;
2764             x_offset_in_pixels = SLOWORD(EDIT_EM_PosFromChar(es, es->x_offset, FALSE));
2765         }
2766
2767         if (-dx > x_offset_in_pixels)
2768                 dx = -x_offset_in_pixels;
2769         if (dx > es->text_width - x_offset_in_pixels)
2770                 dx = es->text_width - x_offset_in_pixels;
2771         nyoff = max(0, es->y_offset + dy);
2772         if (nyoff >= es->line_count)
2773                 nyoff = es->line_count - 1;
2774         dy = (es->y_offset - nyoff) * es->line_height;
2775         if (dx || dy) {
2776                 RECT rc1;
2777                 RECT rc;
2778
2779                 es->y_offset = nyoff;
2780                 if(es->style & ES_MULTILINE)
2781                     es->x_offset += dx;
2782                 else
2783                     es->x_offset += dx / es->char_width;
2784
2785                 GetClientRect(es->hwndSelf, &rc1);
2786                 IntersectRect(&rc, &rc1, &es->format_rect);
2787                 ScrollWindowEx(es->hwndSelf, -dx, dy,
2788                                 NULL, &rc, NULL, NULL, SW_INVALIDATE);
2789                 /* force scroll info update */
2790                 EDIT_UpdateScrollInfo(es);
2791         }
2792         if (dx && !(es->flags & EF_HSCROLL_TRACK))
2793                 EDIT_NOTIFY_PARENT(es, EN_HSCROLL, "EN_HSCROLL");
2794         if (dy && !(es->flags & EF_VSCROLL_TRACK))
2795                 EDIT_NOTIFY_PARENT(es, EN_VSCROLL, "EN_VSCROLL");
2796         return TRUE;
2797 }
2798
2799
2800 /*********************************************************************
2801  *
2802  *      EM_POSFROMCHAR
2803  *
2804  */
2805 static LRESULT EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap)
2806 {
2807         INT len = strlenW(es->text);
2808         INT l;
2809         INT li;
2810         INT x;
2811         INT y = 0;
2812         HDC dc;
2813         HFONT old_font = 0;
2814         SIZE size;
2815
2816         index = min(index, len);
2817         dc = GetDC(es->hwndSelf);
2818         if (es->font)
2819                 old_font = SelectObject(dc, es->font);
2820         if (es->style & ES_MULTILINE) {
2821                 l = EDIT_EM_LineFromChar(es, index);
2822                 y = (l - es->y_offset) * es->line_height;
2823                 li = EDIT_EM_LineIndex(es, l);
2824                 if (after_wrap && (li == index) && l) {
2825                         INT l2 = l - 1;
2826                         LINEDEF *line_def = es->first_line_def;
2827                         while (l2) {
2828                                 line_def = line_def->next;
2829                                 l2--;
2830                         }
2831                         if (line_def->ending == END_WRAP) {
2832                                 l--;
2833                                 y -= es->line_height;
2834                                 li = EDIT_EM_LineIndex(es, l);
2835                         }
2836                 }
2837                 x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
2838                                 es->tabs_count, es->tabs)) - es->x_offset;
2839         } else {
2840                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2841                 if (index < es->x_offset) {
2842                         GetTextExtentPoint32W(dc, text + index,
2843                                         es->x_offset - index, &size);
2844                         x = -size.cx;
2845                 } else {
2846                         GetTextExtentPoint32W(dc, text + es->x_offset,
2847                                         index - es->x_offset, &size);
2848                          x = size.cx;
2849                 }
2850                 y = 0;
2851                 if (es->style & ES_PASSWORD)
2852                         HeapFree(GetProcessHeap(), 0, text);
2853         }
2854         x += es->format_rect.left;
2855         y += es->format_rect.top;
2856         if (es->font)
2857                 SelectObject(dc, old_font);
2858         ReleaseDC(es->hwndSelf, dc);
2859         return MAKELONG((INT16)x, (INT16)y);
2860 }
2861
2862
2863 /*********************************************************************
2864  *
2865  *      EM_REPLACESEL
2866  *
2867  *      FIXME: handle ES_NUMBER and ES_OEMCONVERT here
2868  *
2869  */
2870 static void EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit)
2871 {
2872         UINT strl = strlenW(lpsz_replace);
2873         UINT tl = strlenW(es->text);
2874         UINT utl;
2875         UINT s;
2876         UINT e;
2877         UINT i;
2878         LPWSTR p;
2879         HRGN hrgn = 0;
2880
2881         TRACE("%s, can_undo %d, send_update %d\n",
2882             debugstr_w(lpsz_replace), can_undo, send_update);
2883
2884         s = es->selection_start;
2885         e = es->selection_end;
2886
2887         if ((s == e) && !strl)
2888                 return;
2889
2890         ORDER_UINT(s, e);
2891
2892         if (!EDIT_MakeFit(es, tl - (e - s) + strl, honor_limit))
2893                 return;
2894
2895         if (e != s) {
2896                 /* there is something to be deleted */
2897                 TRACE("deleting stuff.\n");
2898                 if (can_undo) {
2899                         utl = strlenW(es->undo_text);
2900                         if (!es->undo_insert_count && (*es->undo_text && (s == es->undo_position))) {
2901                                 /* undo-buffer is extended to the right */
2902                                 EDIT_MakeUndoFit(es, utl + e - s);
2903                                 strncpyW(es->undo_text + utl, es->text + s, e - s + 1);
2904                                 (es->undo_text + utl)[e - s] = 0; /* ensure 0 termination */
2905                         } else if (!es->undo_insert_count && (*es->undo_text && (e == es->undo_position))) {
2906                                 /* undo-buffer is extended to the left */
2907                                 EDIT_MakeUndoFit(es, utl + e - s);
2908                                 for (p = es->undo_text + utl ; p >= es->undo_text ; p--)
2909                                         p[e - s] = p[0];
2910                                 for (i = 0 , p = es->undo_text ; i < e - s ; i++)
2911                                         p[i] = (es->text + s)[i];
2912                                 es->undo_position = s;
2913                         } else {
2914                                 /* new undo-buffer */
2915                                 EDIT_MakeUndoFit(es, e - s);
2916                                 strncpyW(es->undo_text, es->text + s, e - s + 1);
2917                                 es->undo_text[e - s] = 0; /* ensure 0 termination */
2918                                 es->undo_position = s;
2919                         }
2920                         /* any deletion makes the old insertion-undo invalid */
2921                         es->undo_insert_count = 0;
2922                 } else
2923                         EDIT_EM_EmptyUndoBuffer(es);
2924
2925                 /* now delete */
2926                 strcpyW(es->text + s, es->text + e);
2927         }
2928         if (strl) {
2929                 /* there is an insertion */
2930                 if (can_undo) {
2931                         if ((s == es->undo_position) ||
2932                                         ((es->undo_insert_count) &&
2933                                         (s == es->undo_position + es->undo_insert_count)))
2934                                 /*
2935                                  * insertion is new and at delete position or
2936                                  * an extension to either left or right
2937                                  */
2938                                 es->undo_insert_count += strl;
2939                         else {
2940                                 /* new insertion undo */
2941                                 es->undo_position = s;
2942                                 es->undo_insert_count = strl;
2943                                 /* new insertion makes old delete-buffer invalid */
2944                                 *es->undo_text = '\0';
2945                         }
2946                 } else
2947                         EDIT_EM_EmptyUndoBuffer(es);
2948
2949                 /* now insert */
2950                 tl = strlenW(es->text);
2951                 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));
2952                 for (p = es->text + tl ; p >= es->text + s ; p--)
2953                         p[strl] = p[0];
2954                 for (i = 0 , p = es->text + s ; i < strl ; i++)
2955                         p[i] = lpsz_replace[i];
2956                 if(es->style & ES_UPPERCASE)
2957                         CharUpperBuffW(p, strl);
2958                 else if(es->style & ES_LOWERCASE)
2959                         CharLowerBuffW(p, strl);
2960                 s += strl;
2961         }
2962         if (es->style & ES_MULTILINE)
2963         {
2964                 INT s = min(es->selection_start, es->selection_end);
2965
2966                 hrgn = CreateRectRgn(0, 0, 0, 0);
2967                 EDIT_BuildLineDefs_ML(es, s, s + strl,
2968                                 strl - abs(es->selection_end - es->selection_start), hrgn);
2969         }
2970         else
2971             EDIT_CalcLineWidth_SL(es);
2972
2973         EDIT_EM_SetSel(es, s, s, FALSE);
2974         es->flags |= EF_MODIFIED;
2975         if (send_update) es->flags |= EF_UPDATE;
2976         EDIT_EM_ScrollCaret(es);
2977
2978         /* force scroll info update */
2979         EDIT_UpdateScrollInfo(es);
2980
2981         if (hrgn)
2982         {
2983                 EDIT_UpdateTextRegion(es, hrgn, TRUE);
2984                 DeleteObject(hrgn);
2985         }
2986         else
2987         EDIT_UpdateText(es, NULL, TRUE);
2988
2989         if(es->flags & EF_UPDATE)
2990         {
2991             es->flags &= ~EF_UPDATE;
2992             EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
2993         }
2994 }
2995
2996
2997 /*********************************************************************
2998  *
2999  *      EM_SCROLL
3000  *
3001  */
3002 static LRESULT EDIT_EM_Scroll(EDITSTATE *es, INT action)
3003 {
3004         INT dy;
3005
3006         if (!(es->style & ES_MULTILINE))
3007                 return (LRESULT)FALSE;
3008
3009         dy = 0;
3010
3011         switch (action) {
3012         case SB_LINEUP:
3013                 if (es->y_offset)
3014                         dy = -1;
3015                 break;
3016         case SB_LINEDOWN:
3017                 if (es->y_offset < es->line_count - 1)
3018                         dy = 1;
3019                 break;
3020         case SB_PAGEUP:
3021                 if (es->y_offset)
3022                         dy = -(es->format_rect.bottom - es->format_rect.top) / es->line_height;
3023                 break;
3024         case SB_PAGEDOWN:
3025                 if (es->y_offset < es->line_count - 1)
3026                         dy = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3027                 break;
3028         default:
3029                 return (LRESULT)FALSE;
3030         }
3031         if (dy) {
3032             INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3033             /* check if we are going to move too far */
3034             if(es->y_offset + dy > es->line_count - vlc)
3035                 dy = es->line_count - vlc - es->y_offset;
3036
3037             /* Notification is done in EDIT_EM_LineScroll */
3038             if(dy)
3039                 EDIT_EM_LineScroll(es, 0, dy);
3040         }
3041         return MAKELONG((INT16)dy, (BOOL16)TRUE);
3042 }
3043
3044
3045 /*********************************************************************
3046  *
3047  *      EM_SCROLLCARET
3048  *
3049  */
3050 static void EDIT_EM_ScrollCaret(EDITSTATE *es)
3051 {
3052         if (es->style & ES_MULTILINE) {
3053                 INT l;
3054                 INT li;
3055                 INT vlc;
3056                 INT ww;
3057                 INT cw = es->char_width;
3058                 INT x;
3059                 INT dy = 0;
3060                 INT dx = 0;
3061
3062                 l = EDIT_EM_LineFromChar(es, es->selection_end);
3063                 li = EDIT_EM_LineIndex(es, l);
3064                 x = SLOWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP));
3065                 vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3066                 if (l >= es->y_offset + vlc)
3067                         dy = l - vlc + 1 - es->y_offset;
3068                 if (l < es->y_offset)
3069                         dy = l - es->y_offset;
3070                 ww = es->format_rect.right - es->format_rect.left;
3071                 if (x < es->format_rect.left)
3072                         dx = x - es->format_rect.left - ww / HSCROLL_FRACTION / cw * cw;
3073                 if (x > es->format_rect.right)
3074                         dx = x - es->format_rect.left - (HSCROLL_FRACTION - 1) * ww / HSCROLL_FRACTION / cw * cw;
3075                 if (dy || dx)
3076                 {
3077                     /* check if we are going to move too far */
3078                     if(es->x_offset + dx + ww > es->text_width)
3079                         dx = es->text_width - ww - es->x_offset;
3080                     if(dx || dy)
3081                         EDIT_EM_LineScroll_internal(es, dx, dy);
3082                 }
3083         } else {
3084                 INT x;
3085                 INT goal;
3086                 INT format_width;
3087
3088                 if (!(es->style & ES_AUTOHSCROLL))
3089                         return;
3090
3091                 x = SLOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3092                 format_width = es->format_rect.right - es->format_rect.left;
3093                 if (x < es->format_rect.left) {
3094                         goal = es->format_rect.left + format_width / HSCROLL_FRACTION;
3095                         do {
3096                                 es->x_offset--;
3097                                 x = SLOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3098                         } while ((x < goal) && es->x_offset);
3099                         /* FIXME: use ScrollWindow() somehow to improve performance */
3100                         EDIT_UpdateText(es, NULL, TRUE);
3101                 } else if (x > es->format_rect.right) {
3102                         INT x_last;
3103                         INT len = strlenW(es->text);
3104                         goal = es->format_rect.right - format_width / HSCROLL_FRACTION;
3105                         do {
3106                                 es->x_offset++;
3107                                 x = SLOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3108                                 x_last = SLOWORD(EDIT_EM_PosFromChar(es, len, FALSE));
3109                         } while ((x > goal) && (x_last > es->format_rect.right));
3110                         /* FIXME: use ScrollWindow() somehow to improve performance */
3111                         EDIT_UpdateText(es, NULL, TRUE);
3112                 }
3113         }
3114
3115     if(es->flags & EF_FOCUSED)
3116         EDIT_SetCaretPos(es, es->selection_end, es->flags & EF_AFTER_WRAP);
3117 }
3118
3119
3120 /*********************************************************************
3121  *
3122  *      EM_SETHANDLE
3123  *
3124  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3125  *
3126  */
3127 static void EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc)
3128 {
3129         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
3130
3131         if (!(es->style & ES_MULTILINE))
3132                 return;
3133
3134         if (!hloc) {
3135                 WARN("called with NULL handle\n");
3136                 return;
3137         }
3138
3139         EDIT_UnlockBuffer(es, TRUE);
3140
3141         if(es->hloc16)
3142         {
3143             LOCAL_Free(hInstance, es->hloc16);
3144             es->hloc16 = (HLOCAL16)NULL;
3145         }
3146
3147         if(es->is_unicode)
3148         {
3149             if(es->hloc32A)
3150             {
3151                 LocalFree(es->hloc32A);
3152                 es->hloc32A = NULL;
3153             }
3154             es->hloc32W = hloc;
3155         }
3156         else
3157         {
3158             INT countW, countA;
3159             HLOCAL hloc32W_new;
3160             WCHAR *textW;
3161             CHAR *textA;
3162
3163             countA = LocalSize(hloc);
3164             textA = LocalLock(hloc);
3165             countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3166             if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3167             {
3168                 ERR("Could not allocate new unicode buffer\n");
3169                 return;
3170             }
3171             textW = LocalLock(hloc32W_new);
3172             MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3173             LocalUnlock(hloc32W_new);
3174             LocalUnlock(hloc);
3175
3176             if(es->hloc32W)
3177                 LocalFree(es->hloc32W);
3178
3179             es->hloc32W = hloc32W_new;
3180             es->hloc32A = hloc;
3181         }
3182
3183         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3184
3185         EDIT_LockBuffer(es);
3186
3187         es->x_offset = es->y_offset = 0;
3188         es->selection_start = es->selection_end = 0;
3189         EDIT_EM_EmptyUndoBuffer(es);
3190         es->flags &= ~EF_MODIFIED;
3191         es->flags &= ~EF_UPDATE;
3192         EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3193         EDIT_UpdateText(es, NULL, TRUE);
3194         EDIT_EM_ScrollCaret(es);
3195         /* force scroll info update */
3196         EDIT_UpdateScrollInfo(es);
3197 }
3198
3199
3200 /*********************************************************************
3201  *
3202  *      EM_SETHANDLE16
3203  *
3204  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3205  *
3206  */
3207 static void EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc)
3208 {
3209         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
3210         INT countW, countA;
3211         HLOCAL hloc32W_new;
3212         WCHAR *textW;
3213         CHAR *textA;
3214
3215         if (!(es->style & ES_MULTILINE))
3216                 return;
3217
3218         if (!hloc) {
3219                 WARN("called with NULL handle\n");
3220                 return;
3221         }
3222
3223         EDIT_UnlockBuffer(es, TRUE);
3224
3225         if(es->hloc32A)
3226         {
3227             LocalFree(es->hloc32A);
3228             es->hloc32A = NULL;
3229         }
3230
3231         countA = LOCAL_Size(hInstance, hloc);
3232         textA = LOCAL_Lock(hInstance, hloc);
3233         countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3234         if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3235         {
3236             ERR("Could not allocate new unicode buffer\n");
3237             return;
3238         }
3239         textW = LocalLock(hloc32W_new);
3240         MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3241         LocalUnlock(hloc32W_new);
3242         LOCAL_Unlock(hInstance, hloc);
3243
3244         if(es->hloc32W)
3245             LocalFree(es->hloc32W);
3246
3247         es->hloc32W = hloc32W_new;
3248         es->hloc16 = hloc;
3249
3250         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3251
3252         EDIT_LockBuffer(es);
3253
3254         es->x_offset = es->y_offset = 0;
3255         es->selection_start = es->selection_end = 0;
3256         EDIT_EM_EmptyUndoBuffer(es);
3257         es->flags &= ~EF_MODIFIED;
3258         es->flags &= ~EF_UPDATE;
3259         EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3260         EDIT_UpdateText(es, NULL, TRUE);
3261         EDIT_EM_ScrollCaret(es);
3262         /* force scroll info update */
3263         EDIT_UpdateScrollInfo(es);
3264 }
3265
3266
3267 /*********************************************************************
3268  *
3269  *      EM_SETLIMITTEXT
3270  *
3271  *      FIXME: in WinNT maxsize is 0x7FFFFFFF / 0xFFFFFFFF
3272  *      However, the windows version is not complied to yet in all of edit.c
3273  *
3274  *  Additionally as the wrapper for RichEdit controls we need larger buffers
3275  *  at present -1 will represent nolimit
3276  */
3277 static void EDIT_EM_SetLimitText(EDITSTATE *es, INT limit)
3278 {
3279     if (limit == 0xFFFFFFFF)
3280         es->buffer_limit = -1;
3281     else if (es->style & ES_MULTILINE) {
3282                 if (limit)
3283                         es->buffer_limit = min(limit, BUFLIMIT_MULTI);
3284                 else
3285                         es->buffer_limit = BUFLIMIT_MULTI;
3286         } else {
3287                 if (limit)
3288                         es->buffer_limit = min(limit, BUFLIMIT_SINGLE);
3289                 else
3290                         es->buffer_limit = BUFLIMIT_SINGLE;
3291         }
3292 }
3293
3294
3295 /*********************************************************************
3296  *
3297  *      EM_SETMARGINS
3298  *
3299  * EC_USEFONTINFO is used as a left or right value i.e. lParam and not as an
3300  * action wParam despite what the docs say. EC_USEFONTINFO calculates the
3301  * margin according to the textmetrics of the current font.
3302  *
3303  * FIXME - With TrueType or vector fonts EC_USEFONTINFO currently sets one third
3304  * of the char's width as the margin, but this is not how Windows handles this.
3305  * For all other fonts Windows sets the margins to zero.
3306  *
3307  */
3308 static void EDIT_EM_SetMargins(EDITSTATE *es, INT action,
3309                                INT left, INT right)
3310 {
3311         TEXTMETRICW tm;
3312         INT default_left_margin  = 0; /* in pixels */
3313         INT default_right_margin = 0; /* in pixels */
3314
3315         /* Set the default margins depending on the font */
3316         if (es->font && (left == EC_USEFONTINFO || right == EC_USEFONTINFO)) {
3317             HDC dc = GetDC(es->hwndSelf);
3318             HFONT old_font = SelectObject(dc, es->font);
3319             GetTextMetricsW(dc, &tm);
3320             /* The default margins are only non zero for TrueType or Vector fonts */
3321             if (tm.tmPitchAndFamily & ( TMPF_VECTOR | TMPF_TRUETYPE )) {
3322                 /* This must be calculated more exactly! But how? */
3323                 default_left_margin = tm.tmAveCharWidth / 3;
3324                 default_right_margin = tm.tmAveCharWidth / 3;
3325             }
3326             SelectObject(dc, old_font);
3327             ReleaseDC(es->hwndSelf, dc);
3328         }
3329
3330         if (action & EC_LEFTMARGIN) {
3331                 if (left != EC_USEFONTINFO)
3332                         es->left_margin = left;
3333                 else
3334                         es->left_margin = default_left_margin;
3335         }
3336
3337         if (action & EC_RIGHTMARGIN) {
3338                 if (right != EC_USEFONTINFO)
3339                         es->right_margin = right;
3340                 else
3341                         es->right_margin = default_right_margin;
3342         }
3343         TRACE("left=%d, right=%d\n", es->left_margin, es->right_margin);
3344 }
3345
3346
3347 /*********************************************************************
3348  *
3349  *      EM_SETPASSWORDCHAR
3350  *
3351  */
3352 static void EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c)
3353 {
3354         LONG style;
3355
3356         if (es->style & ES_MULTILINE)
3357                 return;
3358
3359         if (es->password_char == c)
3360                 return;
3361
3362         style = GetWindowLongW( es->hwndSelf, GWL_STYLE );
3363         es->password_char = c;
3364         if (c) {
3365             SetWindowLongW( es->hwndSelf, GWL_STYLE, style | ES_PASSWORD );
3366             es->style |= ES_PASSWORD;
3367         } else {
3368             SetWindowLongW( es->hwndSelf, GWL_STYLE, style & ~ES_PASSWORD );
3369             es->style &= ~ES_PASSWORD;
3370         }
3371         EDIT_UpdateText(es, NULL, TRUE);
3372 }
3373
3374
3375 /*********************************************************************
3376  *
3377  *      EDIT_EM_SetSel
3378  *
3379  *      note:   unlike the specs say: the order of start and end
3380  *              _is_ preserved in Windows.  (i.e. start can be > end)
3381  *              In other words: this handler is OK
3382  *
3383  */
3384 static void EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap)
3385 {
3386         UINT old_start = es->selection_start;
3387         UINT old_end = es->selection_end;
3388         UINT len = strlenW(es->text);
3389
3390         if (start == (UINT)-1) {
3391                 start = es->selection_end;
3392                 end = es->selection_end;
3393         } else {
3394                 start = min(start, len);
3395                 end = min(end, len);
3396         }
3397         es->selection_start = start;
3398         es->selection_end = end;
3399         if (after_wrap)
3400                 es->flags |= EF_AFTER_WRAP;
3401         else
3402                 es->flags &= ~EF_AFTER_WRAP;
3403 /* This is a little bit more efficient than before, not sure if it can be improved. FIXME? */
3404         ORDER_UINT(start, end);
3405         ORDER_UINT(end, old_end);
3406         ORDER_UINT(start, old_start);
3407         ORDER_UINT(old_start, old_end);
3408         if (end != old_start)
3409         {
3410 /*
3411  * One can also do
3412  *          ORDER_UINT32(end, old_start);
3413  *          EDIT_InvalidateText(es, start, end);
3414  *          EDIT_InvalidateText(es, old_start, old_end);
3415  * in place of the following if statement.
3416  */
3417             if (old_start > end )
3418             {
3419                 EDIT_InvalidateText(es, start, end);
3420                 EDIT_InvalidateText(es, old_start, old_end);
3421             }
3422             else
3423             {
3424                 EDIT_InvalidateText(es, start, old_start);
3425                 EDIT_InvalidateText(es, end, old_end);
3426             }
3427         }
3428         else EDIT_InvalidateText(es, start, old_end);
3429 }
3430
3431
3432 /*********************************************************************
3433  *
3434  *      EM_SETTABSTOPS
3435  *
3436  */
3437 static BOOL EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs)
3438 {
3439         if (!(es->style & ES_MULTILINE))
3440                 return FALSE;
3441         if (es->tabs)
3442                 HeapFree(GetProcessHeap(), 0, es->tabs);
3443         es->tabs_count = count;
3444         if (!count)
3445                 es->tabs = NULL;
3446         else {
3447                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3448                 memcpy(es->tabs, tabs, count * sizeof(INT));
3449         }
3450         return TRUE;
3451 }
3452
3453
3454 /*********************************************************************
3455  *
3456  *      EM_SETTABSTOPS16
3457  *
3458  */
3459 static BOOL EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs)
3460 {
3461         if (!(es->style & ES_MULTILINE))
3462                 return FALSE;
3463         if (es->tabs)
3464                 HeapFree(GetProcessHeap(), 0, es->tabs);
3465         es->tabs_count = count;
3466         if (!count)
3467                 es->tabs = NULL;
3468         else {
3469                 INT i;
3470                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3471                 for (i = 0 ; i < count ; i++)
3472                         es->tabs[i] = *tabs++;
3473         }
3474         return TRUE;
3475 }
3476
3477
3478 /*********************************************************************
3479  *
3480  *      EM_SETWORDBREAKPROC
3481  *
3482  */
3483 static void EDIT_EM_SetWordBreakProc(EDITSTATE *es, LPARAM lParam)
3484 {
3485         if (es->word_break_proc == (void *)lParam)
3486                 return;
3487
3488         es->word_break_proc = (void *)lParam;
3489         es->word_break_proc16 = NULL;
3490
3491         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3492                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3493                 EDIT_UpdateText(es, NULL, TRUE);
3494         }
3495 }
3496
3497
3498 /*********************************************************************
3499  *
3500  *      EM_SETWORDBREAKPROC16
3501  *
3502  */
3503 static void EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp)
3504 {
3505         if (es->word_break_proc16 == wbp)
3506                 return;
3507
3508         es->word_break_proc = NULL;
3509         es->word_break_proc16 = wbp;
3510         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3511                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3512                 EDIT_UpdateText(es, NULL, TRUE);
3513         }
3514 }
3515
3516
3517 /*********************************************************************
3518  *
3519  *      EM_UNDO / WM_UNDO
3520  *
3521  */
3522 static BOOL EDIT_EM_Undo(EDITSTATE *es)
3523 {
3524         INT ulength;
3525         LPWSTR utext;
3526
3527         /* Protect read-only edit control from modification */
3528         if(es->style & ES_READONLY)
3529             return FALSE;
3530
3531         ulength = strlenW(es->undo_text);
3532         utext = HeapAlloc(GetProcessHeap(), 0, (ulength + 1) * sizeof(WCHAR));
3533
3534         strcpyW(utext, es->undo_text);
3535
3536         TRACE("before UNDO:insertion length = %d, deletion buffer = %s\n",
3537                      es->undo_insert_count, debugstr_w(utext));
3538
3539         EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3540         EDIT_EM_EmptyUndoBuffer(es);
3541         EDIT_EM_ReplaceSel(es, TRUE, utext, FALSE, TRUE);
3542         EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3543         /* send the notification after the selection start and end are set */
3544         EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
3545         EDIT_EM_ScrollCaret(es);
3546         HeapFree(GetProcessHeap(), 0, utext);
3547
3548         TRACE("after UNDO:insertion length = %d, deletion buffer = %s\n",
3549                         es->undo_insert_count, debugstr_w(es->undo_text));
3550         return TRUE;
3551 }
3552
3553
3554 /*********************************************************************
3555  *
3556  *      WM_CHAR
3557  *
3558  */
3559 static void EDIT_WM_Char(EDITSTATE *es, WCHAR c)
3560 {
3561         BOOL control;
3562
3563         /* Protect read-only edit control from modification */
3564         if(es->style & ES_READONLY)
3565             return;
3566
3567         control = GetKeyState(VK_CONTROL) & 0x8000;
3568
3569         switch (c) {
3570         case '\r':
3571             /* If the edit doesn't want the return and it's not a multiline edit, do nothing */
3572             if(!(es->style & ES_MULTILINE) && !(es->style & ES_WANTRETURN))
3573                 break;
3574         case '\n':
3575                 if (es->style & ES_MULTILINE) {
3576                         if (es->style & ES_READONLY) {
3577                                 EDIT_MoveHome(es, FALSE);
3578                                 EDIT_MoveDown_ML(es, FALSE);
3579                         } else {
3580                                 static const WCHAR cr_lfW[] = {'\r','\n',0};
3581                                 EDIT_EM_ReplaceSel(es, TRUE, cr_lfW, TRUE, TRUE);
3582                         }
3583                 }
3584                 break;
3585         case '\t':
3586                 if ((es->style & ES_MULTILINE) && !(es->style & ES_READONLY))
3587                 {
3588                         static const WCHAR tabW[] = {'\t',0};
3589                         EDIT_EM_ReplaceSel(es, TRUE, tabW, TRUE, TRUE);
3590                 }
3591                 break;
3592         case VK_BACK:
3593                 if (!(es->style & ES_READONLY) && !control) {
3594                         if (es->selection_start != es->selection_end)
3595                                 EDIT_WM_Clear(es);
3596                         else {
3597                                 /* delete character left of caret */
3598                                 EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
3599                                 EDIT_MoveBackward(es, TRUE);
3600                                 EDIT_WM_Clear(es);
3601                         }
3602                 }
3603                 break;
3604         case 0x03: /* ^C */
3605                 SendMessageW(es->hwndSelf, WM_COPY, 0, 0);
3606                 break;
3607         case 0x16: /* ^V */
3608                 SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
3609                 break;
3610         case 0x18: /* ^X */
3611                 SendMessageW(es->hwndSelf, WM_CUT, 0, 0);
3612                 break;
3613
3614         default:
3615                 if (!(es->style & ES_READONLY) && (c >= ' ') && (c != 127)) {
3616                         WCHAR str[2];
3617                         str[0] = c;
3618                         str[1] = '\0';
3619                         EDIT_EM_ReplaceSel(es, TRUE, str, TRUE, TRUE);
3620                 }
3621                 break;
3622         }
3623 }
3624
3625
3626 /*********************************************************************
3627  *
3628  *      WM_COMMAND
3629  *
3630  */
3631 static void EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND control)
3632 {
3633         if (code || control)
3634                 return;
3635
3636         switch (id) {
3637                 case EM_UNDO:
3638                         EDIT_EM_Undo(es);
3639                         break;
3640                 case WM_CUT:
3641                         EDIT_WM_Cut(es);
3642                         break;
3643                 case WM_COPY:
3644                         EDIT_WM_Copy(es);
3645                         break;
3646                 case WM_PASTE:
3647                         EDIT_WM_Paste(es);
3648                         break;
3649                 case WM_CLEAR:
3650                         EDIT_WM_Clear(es);
3651                         break;
3652                 case EM_SETSEL:
3653                         EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
3654                         EDIT_EM_ScrollCaret(es);
3655                         break;
3656                 default:
3657                         ERR("unknown menu item, please report\n");
3658                         break;
3659         }
3660 }
3661
3662
3663 /*********************************************************************
3664  *
3665  *      WM_CONTEXTMENU
3666  *
3667  *      Note: the resource files resource/sysres_??.rc cannot define a
3668  *              single popup menu.  Hence we use a (dummy) menubar
3669  *              containing the single popup menu as its first item.
3670  *
3671  *      FIXME: the message identifiers have been chosen arbitrarily,
3672  *              hence we use MF_BYPOSITION.
3673  *              We might as well use the "real" values (anybody knows ?)
3674  *              The menu definition is in resources/sysres_??.rc.
3675  *              Once these are OK, we better use MF_BYCOMMAND here
3676  *              (as we do in EDIT_WM_Command()).
3677  *
3678  */
3679 static void EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y)
3680 {
3681         HMENU menu = LoadMenuA(GetModuleHandleA("USER32"), "EDITMENU");
3682         HMENU popup = GetSubMenu(menu, 0);
3683         UINT start = es->selection_start;
3684         UINT end = es->selection_end;
3685
3686         ORDER_UINT(start, end);
3687
3688         /* undo */
3689         EnableMenuItem(popup, 0, MF_BYPOSITION | (EDIT_EM_CanUndo(es) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3690         /* cut */
3691         EnableMenuItem(popup, 2, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3692         /* copy */
3693         EnableMenuItem(popup, 3, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) ? MF_ENABLED : MF_GRAYED));
3694         /* paste */
3695         EnableMenuItem(popup, 4, MF_BYPOSITION | (IsClipboardFormatAvailable(CF_UNICODETEXT) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3696         /* delete */
3697         EnableMenuItem(popup, 5, MF_BYPOSITION | ((end - start) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3698         /* select all */
3699         EnableMenuItem(popup, 7, MF_BYPOSITION | (start || (end != strlenW(es->text)) ? MF_ENABLED : MF_GRAYED));
3700
3701         TrackPopupMenu(popup, TPM_LEFTALIGN | TPM_RIGHTBUTTON, x, y, 0, es->hwndSelf, NULL);
3702         DestroyMenu(menu);
3703 }
3704
3705
3706 /*********************************************************************
3707  *
3708  *      WM_COPY
3709  *
3710  */
3711 static void EDIT_WM_Copy(EDITSTATE *es)
3712 {
3713         INT s = min(es->selection_start, es->selection_end);
3714         INT e = max(es->selection_start, es->selection_end);
3715         HGLOBAL hdst;
3716         LPWSTR dst;
3717
3718         if (e == s) return;
3719
3720         hdst = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, (DWORD)(e - s + 1) * sizeof(WCHAR));
3721         dst = GlobalLock(hdst);
3722         strncpyW(dst, es->text + s, e - s);
3723         dst[e - s] = 0; /* ensure 0 termination */
3724         TRACE("%s\n", debugstr_w(dst));
3725         GlobalUnlock(hdst);
3726         OpenClipboard(es->hwndSelf);
3727         EmptyClipboard();
3728         SetClipboardData(CF_UNICODETEXT, hdst);
3729         CloseClipboard();
3730 }
3731
3732
3733 /*********************************************************************
3734  *
3735  *      WM_CREATE
3736  *
3737  */
3738 static LRESULT EDIT_WM_Create(EDITSTATE *es, LPCWSTR name)
3739 {
3740         TRACE("%s\n", debugstr_w(name));
3741        /*
3742         *       To initialize some final structure members, we call some helper
3743         *       functions.  However, since the EDITSTATE is not consistent (i.e.
3744         *       not fully initialized), we should be very careful which
3745         *       functions can be called, and in what order.
3746         */
3747         EDIT_WM_SetFont(es, 0, FALSE);
3748         EDIT_EM_EmptyUndoBuffer(es);
3749
3750        if (name && *name) {
3751            EDIT_EM_ReplaceSel(es, FALSE, name, FALSE, TRUE);
3752            /* if we insert text to the editline, the text scrolls out
3753             * of the window, as the caret is placed after the insert
3754             * pos normally; thus we reset es->selection... to 0 and
3755             * update caret
3756             */
3757            es->selection_start = es->selection_end = 0;
3758            /* Adobe Photoshop does NOT like this. and MSDN says that EN_CHANGE
3759             * Messages are only to be sent when the USER does something to
3760             * change the contents. So I am removing this EN_CHANGE
3761             *
3762             * EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
3763             */
3764            EDIT_EM_ScrollCaret(es);
3765        }
3766        /* force scroll info update */
3767        EDIT_UpdateScrollInfo(es);
3768        return 0;
3769 }
3770
3771
3772 /*********************************************************************
3773  *
3774  *      WM_DESTROY
3775  *
3776  */
3777 static LRESULT EDIT_WM_Destroy(EDITSTATE *es)
3778 {
3779         LINEDEF *pc, *pp;
3780
3781         if (es->hloc32W) {
3782                 while (LocalUnlock(es->hloc32W)) ;
3783                 LocalFree(es->hloc32W);
3784         }
3785         if (es->hloc32A) {
3786                 while (LocalUnlock(es->hloc32A)) ;
3787                 LocalFree(es->hloc32A);
3788         }
3789         if (es->hloc16) {
3790                 HINSTANCE16 hInstance = GetWindowWord( es->hwndSelf, GWL_HINSTANCE );
3791                 while (LOCAL_Unlock(hInstance, es->hloc16)) ;
3792                 LOCAL_Free(hInstance, es->hloc16);
3793         }
3794
3795         pc = es->first_line_def;
3796         while (pc)
3797         {
3798                 pp = pc->next;
3799                 HeapFree(GetProcessHeap(), 0, pc);
3800                 pc = pp;
3801         }
3802
3803         SetWindowLongW( es->hwndSelf, 0, 0 );
3804         HeapFree(GetProcessHeap(), 0, es);
3805
3806         return 0;
3807 }
3808
3809
3810 /*********************************************************************
3811  *
3812  *      WM_ERASEBKGND
3813  *
3814  */
3815 static LRESULT EDIT_WM_EraseBkGnd(EDITSTATE *es, HDC dc)
3816 {
3817         HBRUSH brush;
3818         RECT rc;
3819
3820         if (!(brush = EDIT_NotifyCtlColor(es, dc)))
3821                 brush = (HBRUSH)GetStockObject(WHITE_BRUSH);
3822
3823         GetClientRect(es->hwndSelf, &rc);
3824         IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
3825         GetClipBox(dc, &rc);
3826         /*
3827          *      FIXME:  specs say that we should UnrealizeObject() the brush,
3828          *              but the specs of UnrealizeObject() say that we shouldn't
3829          *              unrealize a stock object.  The default brush that
3830          *              DefWndProc() returns is ... a stock object.
3831          */
3832         FillRect(dc, &rc, brush);
3833         return -1;
3834 }
3835
3836
3837 /*********************************************************************
3838  *
3839  *      WM_GETTEXT
3840  *
3841  */
3842 static INT EDIT_WM_GetText(EDITSTATE *es, INT count, LPARAM lParam, BOOL unicode)
3843 {
3844     if(!count) return 0;
3845
3846     if(unicode)
3847     {
3848         LPWSTR textW = (LPWSTR)lParam;
3849         lstrcpynW(textW, es->text, count);
3850         return strlenW(textW);
3851     }
3852     else
3853     {
3854         LPSTR textA = (LPSTR)lParam;
3855         if (!WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, count, NULL, NULL))
3856             textA[count - 1] = 0; /* ensure 0 termination */
3857         return strlen(textA);
3858     }
3859 }
3860
3861 /*********************************************************************
3862  *
3863  *      WM_HSCROLL
3864  *
3865  */
3866 static LRESULT EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos)
3867 {
3868         INT dx;
3869         INT fw;
3870
3871         if (!(es->style & ES_MULTILINE))
3872                 return 0;
3873
3874         if (!(es->style & ES_AUTOHSCROLL))
3875                 return 0;
3876
3877         dx = 0;
3878         fw = es->format_rect.right - es->format_rect.left;
3879         switch (action) {
3880         case SB_LINELEFT:
3881                 TRACE("SB_LINELEFT\n");
3882                 if (es->x_offset)
3883                         dx = -es->char_width;
3884                 break;
3885         case SB_LINERIGHT:
3886                 TRACE("SB_LINERIGHT\n");
3887                 if (es->x_offset < es->text_width)
3888                         dx = es->char_width;
3889                 break;
3890         case SB_PAGELEFT:
3891                 TRACE("SB_PAGELEFT\n");
3892                 if (es->x_offset)
3893                         dx = -fw / HSCROLL_FRACTION / es->char_width * es->char_width;
3894                 break;
3895         case SB_PAGERIGHT:
3896                 TRACE("SB_PAGERIGHT\n");
3897                 if (es->x_offset < es->text_width)
3898                         dx = fw / HSCROLL_FRACTION / es->char_width * es->char_width;
3899                 break;
3900         case SB_LEFT:
3901                 TRACE("SB_LEFT\n");
3902                 if (es->x_offset)
3903                         dx = -es->x_offset;
3904                 break;
3905         case SB_RIGHT:
3906                 TRACE("SB_RIGHT\n");
3907                 if (es->x_offset < es->text_width)
3908                         dx = es->text_width - es->x_offset;
3909                 break;
3910         case SB_THUMBTRACK:
3911                 TRACE("SB_THUMBTRACK %d\n", pos);
3912                 es->flags |= EF_HSCROLL_TRACK;
3913                 if(es->style & WS_HSCROLL)
3914                     dx = pos - es->x_offset;
3915                 else
3916                 {
3917                     INT fw, new_x;
3918                     /* Sanity check */
3919                     if(pos < 0 || pos > 100) return 0;
3920                     /* Assume default scroll range 0-100 */
3921                     fw = es->format_rect.right - es->format_rect.left;
3922                     new_x = pos * (es->text_width - fw) / 100;
3923                     dx = es->text_width ? (new_x - es->x_offset) : 0;
3924                 }
3925                 break;
3926         case SB_THUMBPOSITION:
3927                 TRACE("SB_THUMBPOSITION %d\n", pos);
3928                 es->flags &= ~EF_HSCROLL_TRACK;
3929                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
3930                     dx = pos - es->x_offset;
3931                 else
3932                 {
3933                     INT fw, new_x;
3934                     /* Sanity check */
3935                     if(pos < 0 || pos > 100) return 0;
3936                     /* Assume default scroll range 0-100 */
3937                     fw = es->format_rect.right - es->format_rect.left;
3938                     new_x = pos * (es->text_width - fw) / 100;
3939                     dx = es->text_width ? (new_x - es->x_offset) : 0;
3940                 }
3941                 if (!dx) {
3942                         /* force scroll info update */
3943                         EDIT_UpdateScrollInfo(es);
3944                         EDIT_NOTIFY_PARENT(es, EN_HSCROLL, "EN_HSCROLL");
3945                 }
3946                 break;
3947         case SB_ENDSCROLL:
3948                 TRACE("SB_ENDSCROLL\n");
3949                 break;
3950         /*
3951          *      FIXME : the next two are undocumented !
3952          *      Are we doing the right thing ?
3953          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
3954          *      although it's also a regular control message.
3955          */
3956         case EM_GETTHUMB: /* this one is used by NT notepad */
3957         case EM_GETTHUMB16:
3958         {
3959                 LRESULT ret;
3960                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
3961                     ret = GetScrollPos(es->hwndSelf, SB_HORZ);
3962                 else
3963                 {
3964                     /* Assume default scroll range 0-100 */
3965                     INT fw = es->format_rect.right - es->format_rect.left;
3966                     ret = es->text_width ? es->x_offset * 100 / (es->text_width - fw) : 0;
3967                 }
3968                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
3969                 return ret;
3970         }
3971         case EM_LINESCROLL16:
3972                 TRACE("EM_LINESCROLL16\n");
3973                 dx = pos;
3974                 break;
3975
3976         default:
3977                 ERR("undocumented WM_HSCROLL action %d (0x%04x), please report\n",
3978                     action, action);
3979                 return 0;
3980         }
3981         if (dx)
3982         {
3983             INT fw = es->format_rect.right - es->format_rect.left;
3984             /* check if we are going to move too far */
3985             if(es->x_offset + dx + fw > es->text_width)
3986                 dx = es->text_width - fw - es->x_offset;
3987             if(dx)
3988                 EDIT_EM_LineScroll_internal(es, dx, 0);
3989         }
3990         return 0;
3991 }
3992
3993
3994 /*********************************************************************
3995  *
3996  *      EDIT_CheckCombo
3997  *
3998  */
3999 static BOOL EDIT_CheckCombo(EDITSTATE *es, UINT msg, INT key)
4000 {
4001    HWND hLBox = es->hwndListBox;
4002    HWND hCombo;
4003    BOOL bDropped;
4004    int  nEUI;
4005
4006    if (!hLBox)
4007       return FALSE;
4008
4009    hCombo   = GetParent(es->hwndSelf);
4010    bDropped = TRUE;
4011    nEUI     = 0;
4012
4013    TRACE_(combo)("[%p]: handling msg %x (%x)\n", es->hwndSelf, msg, key);
4014
4015    if (key == VK_UP || key == VK_DOWN)
4016    {
4017       if (SendMessageW(hCombo, CB_GETEXTENDEDUI, 0, 0))
4018          nEUI = 1;
4019
4020       if (msg == WM_KEYDOWN || nEUI)
4021           bDropped = (BOOL)SendMessageW(hCombo, CB_GETDROPPEDSTATE, 0, 0);
4022    }
4023
4024    switch (msg)
4025    {
4026       case WM_KEYDOWN:
4027          if (!bDropped && nEUI && (key == VK_UP || key == VK_DOWN))
4028          {
4029             /* make sure ComboLBox pops up */
4030             SendMessageW(hCombo, CB_SETEXTENDEDUI, FALSE, 0);
4031             key = VK_F4;
4032             nEUI = 2;
4033          }
4034
4035          SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)key, 0);
4036          break;
4037
4038       case WM_SYSKEYDOWN: /* Handle Alt+up/down arrows */
4039          if (nEUI)
4040             SendMessageW(hCombo, CB_SHOWDROPDOWN, bDropped ? FALSE : TRUE, 0);
4041          else
4042             SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)VK_F4, 0);
4043          break;
4044    }
4045
4046    if(nEUI == 2)
4047       SendMessageW(hCombo, CB_SETEXTENDEDUI, TRUE, 0);
4048
4049    return TRUE;
4050 }
4051
4052
4053 /*********************************************************************
4054  *
4055  *      WM_KEYDOWN
4056  *
4057  *      Handling of special keys that don't produce a WM_CHAR
4058  *      (i.e. non-printable keys) & Backspace & Delete
4059  *
4060  */
4061 static LRESULT EDIT_WM_KeyDown(EDITSTATE *es, INT key)
4062 {
4063         BOOL shift;
4064         BOOL control;
4065
4066         if (GetKeyState(VK_MENU) & 0x8000)
4067                 return 0;
4068
4069         shift = GetKeyState(VK_SHIFT) & 0x8000;
4070         control = GetKeyState(VK_CONTROL) & 0x8000;
4071
4072         switch (key) {
4073         case VK_F4:
4074         case VK_UP:
4075                 if (EDIT_CheckCombo(es, WM_KEYDOWN, key) || key == VK_F4)
4076                         break;
4077
4078                 /* fall through */
4079         case VK_LEFT:
4080                 if ((es->style & ES_MULTILINE) && (key == VK_UP))
4081                         EDIT_MoveUp_ML(es, shift);
4082                 else
4083                         if (control)
4084                                 EDIT_MoveWordBackward(es, shift);
4085                         else
4086                                 EDIT_MoveBackward(es, shift);
4087                 break;
4088         case VK_DOWN:
4089                 if (EDIT_CheckCombo(es, WM_KEYDOWN, key))
4090                         break;
4091                 /* fall through */
4092         case VK_RIGHT:
4093                 if ((es->style & ES_MULTILINE) && (key == VK_DOWN))
4094                         EDIT_MoveDown_ML(es, shift);
4095                 else if (control)
4096                         EDIT_MoveWordForward(es, shift);
4097                 else
4098                         EDIT_MoveForward(es, shift);
4099                 break;
4100         case VK_HOME:
4101                 EDIT_MoveHome(es, shift);
4102                 break;
4103         case VK_END:
4104                 EDIT_MoveEnd(es, shift);
4105                 break;
4106         case VK_PRIOR:
4107                 if (es->style & ES_MULTILINE)
4108                         EDIT_MovePageUp_ML(es, shift);
4109                 else
4110                         EDIT_CheckCombo(es, WM_KEYDOWN, key);
4111                 break;
4112         case VK_NEXT:
4113                 if (es->style & ES_MULTILINE)
4114                         EDIT_MovePageDown_ML(es, shift);
4115                 else
4116                         EDIT_CheckCombo(es, WM_KEYDOWN, key);
4117                 break;
4118         case VK_DELETE:
4119                 if (!(es->style & ES_READONLY) && !(shift && control)) {
4120                         if (es->selection_start != es->selection_end) {
4121                                 if (shift)
4122                                         EDIT_WM_Cut(es);
4123                                 else
4124                                         EDIT_WM_Clear(es);
4125                         } else {
4126                                 if (shift) {
4127                                         /* delete character left of caret */
4128                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4129                                         EDIT_MoveBackward(es, TRUE);
4130                                         EDIT_WM_Clear(es);
4131                                 } else if (control) {
4132                                         /* delete to end of line */
4133                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4134                                         EDIT_MoveEnd(es, TRUE);
4135                                         EDIT_WM_Clear(es);
4136                                 } else {
4137                                         /* delete character right of caret */
4138                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4139                                         EDIT_MoveForward(es, TRUE);
4140                                         EDIT_WM_Clear(es);
4141                                 }
4142                         }
4143                 }
4144                 break;
4145         case VK_INSERT:
4146                 if (shift) {
4147                         if (!(es->style & ES_READONLY))
4148                                 EDIT_WM_Paste(es);
4149                 } else if (control)
4150                         EDIT_WM_Copy(es);
4151                 break;
4152         case VK_RETURN:
4153             /* If the edit doesn't want the return send a message to the default object */
4154             if(!(es->style & ES_WANTRETURN))
4155             {
4156                 HWND hwndParent = GetParent(es->hwndSelf);
4157                 DWORD dw = SendMessageW( hwndParent, DM_GETDEFID, 0, 0 );
4158                 if (HIWORD(dw) == DC_HASDEFID)
4159                 {
4160                     SendMessageW( hwndParent, WM_COMMAND,
4161                                   MAKEWPARAM( LOWORD(dw), BN_CLICKED ),
4162                               (LPARAM)GetDlgItem( hwndParent, LOWORD(dw) ) );
4163                 }
4164             }
4165             break;
4166         }
4167         return 0;
4168 }
4169
4170
4171 /*********************************************************************
4172  *
4173  *      WM_KILLFOCUS
4174  *
4175  */
4176 static LRESULT EDIT_WM_KillFocus(EDITSTATE *es)
4177 {
4178         es->flags &= ~EF_FOCUSED;
4179         DestroyCaret();
4180         if(!(es->style & ES_NOHIDESEL))
4181                 EDIT_InvalidateText(es, es->selection_start, es->selection_end);
4182         EDIT_NOTIFY_PARENT(es, EN_KILLFOCUS, "EN_KILLFOCUS");
4183         return 0;
4184 }
4185
4186
4187 /*********************************************************************
4188  *
4189  *      WM_LBUTTONDBLCLK
4190  *
4191  *      The caret position has been set on the WM_LBUTTONDOWN message
4192  *
4193  */
4194 static LRESULT EDIT_WM_LButtonDblClk(EDITSTATE *es)
4195 {
4196         INT s;
4197         INT e = es->selection_end;
4198         INT l;
4199         INT li;
4200         INT ll;
4201
4202         if (!(es->flags & EF_FOCUSED))
4203                 return 0;
4204
4205         l = EDIT_EM_LineFromChar(es, e);
4206         li = EDIT_EM_LineIndex(es, l);
4207         ll = EDIT_EM_LineLength(es, e);
4208         s = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_LEFT);
4209         e = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_RIGHT);
4210         EDIT_EM_SetSel(es, s, e, FALSE);
4211         EDIT_EM_ScrollCaret(es);
4212         return 0;
4213 }
4214
4215
4216 /*********************************************************************
4217  *
4218  *      WM_LBUTTONDOWN
4219  *
4220  */
4221 static LRESULT EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y)
4222 {
4223         INT e;
4224         BOOL after_wrap;
4225
4226         if (!(es->flags & EF_FOCUSED))
4227                 return 0;
4228
4229         es->bCaptureState = TRUE;
4230         SetCapture(es->hwndSelf);
4231         EDIT_ConfinePoint(es, &x, &y);
4232         e = EDIT_CharFromPos(es, x, y, &after_wrap);
4233         EDIT_EM_SetSel(es, (keys & MK_SHIFT) ? es->selection_start : e, e, after_wrap);
4234         EDIT_EM_ScrollCaret(es);
4235         es->region_posx = es->region_posy = 0;
4236         SetTimer(es->hwndSelf, 0, 100, NULL);
4237         return 0;
4238 }
4239
4240
4241 /*********************************************************************
4242  *
4243  *      WM_LBUTTONUP
4244  *
4245  */
4246 static LRESULT EDIT_WM_LButtonUp(EDITSTATE *es)
4247 {
4248         if (es->bCaptureState) {
4249                 KillTimer(es->hwndSelf, 0);
4250                 if (GetCapture() == es->hwndSelf) ReleaseCapture();
4251         }
4252         es->bCaptureState = FALSE;
4253         return 0;
4254 }
4255
4256
4257 /*********************************************************************
4258  *
4259  *      WM_MBUTTONDOWN
4260  *
4261  */
4262 static LRESULT EDIT_WM_MButtonDown(EDITSTATE *es)
4263 {
4264     SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
4265     return 0;
4266 }
4267
4268
4269 /*********************************************************************
4270  *
4271  *      WM_MOUSEMOVE
4272  *
4273  */
4274 static LRESULT EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y)
4275 {
4276         INT e;
4277         BOOL after_wrap;
4278         INT prex, prey;
4279
4280         if (GetCapture() != es->hwndSelf)
4281                 return 0;
4282
4283         /*
4284          *      FIXME: gotta do some scrolling if outside client
4285          *              area.  Maybe reset the timer ?
4286          */
4287         prex = x; prey = y;
4288         EDIT_ConfinePoint(es, &x, &y);
4289         es->region_posx = (prex < x) ? -1 : ((prex > x) ? 1 : 0);
4290         es->region_posy = (prey < y) ? -1 : ((prey > y) ? 1 : 0);
4291         e = EDIT_CharFromPos(es, x, y, &after_wrap);
4292         EDIT_EM_SetSel(es, es->selection_start, e, after_wrap);
4293         EDIT_SetCaretPos(es,es->selection_end,es->flags & EF_AFTER_WRAP);
4294         return 0;
4295 }
4296
4297
4298 /*********************************************************************
4299  *
4300  *      WM_NCCREATE
4301  *
4302  * See also EDIT_WM_StyleChanged
4303  */
4304 static LRESULT EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode)
4305 {
4306         EDITSTATE *es;
4307         UINT alloc_size;
4308
4309         TRACE("Creating %s edit control, style = %08lx\n",
4310                 unicode ? "Unicode" : "ANSI", lpcs->style);
4311
4312         if (!(es = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*es))))
4313                 return FALSE;
4314         SetWindowLongW( hwnd, 0, (LONG)es );
4315
4316        /*
4317         *      Note: since the EDITSTATE has not been fully initialized yet,
4318         *            we can't use any API calls that may send
4319         *            WM_XXX messages before WM_NCCREATE is completed.
4320         */
4321
4322         es->is_unicode = unicode;
4323         es->style = lpcs->style;
4324
4325         es->bEnableState = !(es->style & WS_DISABLED);
4326
4327         es->hwndSelf = hwnd;
4328         /* Save parent, which will be notified by EN_* messages */
4329         es->hwndParent = lpcs->hwndParent;
4330
4331         if (es->style & ES_COMBO)
4332            es->hwndListBox = GetDlgItem(es->hwndParent, ID_CB_LISTBOX);
4333
4334         /* Number overrides lowercase overrides uppercase (at least it
4335          * does in Win95).  However I'll bet that ES_NUMBER would be
4336          * invalid under Win 3.1.
4337          */
4338         if (es->style & ES_NUMBER) {
4339                 ; /* do not override the ES_NUMBER */
4340         }  else if (es->style & ES_LOWERCASE) {
4341                 es->style &= ~ES_UPPERCASE;
4342         }
4343         if (es->style & ES_MULTILINE) {
4344                 es->buffer_limit = BUFLIMIT_MULTI;
4345                 if (es->style & WS_VSCROLL)
4346                         es->style |= ES_AUTOVSCROLL;
4347                 if (es->style & WS_HSCROLL)
4348                         es->style |= ES_AUTOHSCROLL;
4349                 es->style &= ~ES_PASSWORD;
4350                 if ((es->style & ES_CENTER) || (es->style & ES_RIGHT)) {
4351                         /* Confirmed - RIGHT overrides CENTER */
4352                         if (es->style & ES_RIGHT)
4353                                 es->style &= ~ES_CENTER;
4354                         es->style &= ~WS_HSCROLL;
4355                         es->style &= ~ES_AUTOHSCROLL;
4356                 }
4357
4358                 /* FIXME: for now, all multi line controls are AUTOVSCROLL */
4359                 es->style |= ES_AUTOVSCROLL;
4360         } else {
4361                 es->buffer_limit = BUFLIMIT_SINGLE;
4362                 if (WIN31_LOOK == TWEAK_WineLook ||
4363                     WIN95_LOOK == TWEAK_WineLook) {
4364                         es->style &= ~ES_CENTER;
4365                         es->style &= ~ES_RIGHT;
4366                 } else {
4367                         if (es->style & ES_RIGHT)
4368                                 es->style &= ~ES_CENTER;
4369                 }
4370                 es->style &= ~WS_HSCROLL;
4371                 es->style &= ~WS_VSCROLL;
4372                 es->style &= ~ES_AUTOVSCROLL;
4373                 es->style &= ~ES_WANTRETURN;
4374                 if (es->style & ES_PASSWORD)
4375                         es->password_char = '*';
4376
4377                 /* FIXME: for now, all single line controls are AUTOHSCROLL */
4378                 es->style |= ES_AUTOHSCROLL;
4379         }
4380
4381         alloc_size = ROUND_TO_GROW((es->buffer_size + 1) * sizeof(WCHAR));
4382         if(!(es->hloc32W = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
4383             return FALSE;
4384         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
4385
4386         if (!(es->undo_text = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (es->buffer_size + 1) * sizeof(WCHAR))))
4387                 return FALSE;
4388         es->undo_buffer_size = es->buffer_size;
4389
4390         if (es->style & ES_MULTILINE)
4391                 if (!(es->first_line_def = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LINEDEF))))
4392                         return FALSE;
4393         es->line_count = 1;
4394
4395         /*
4396          * In Win95 look and feel, the WS_BORDER style is replaced by the
4397          * WS_EX_CLIENTEDGE style for the edit control. This gives the edit
4398          * control a non client area.  Not always.  This coordinates in some
4399          * way with the window creation code in dialog.c  When making
4400          * modifications please ensure that the code still works for edit
4401          * controls created directly with style 0x50800000, exStyle 0 (
4402          * which should have a single pixel border)
4403          */
4404         if (TWEAK_WineLook != WIN31_LOOK)
4405         {
4406           es->style      &= ~WS_BORDER;
4407         }
4408         else
4409         {
4410           if ((es->style & WS_BORDER) && !(es->style & WS_DLGFRAME))
4411               SetWindowLongW( hwnd, GWL_STYLE,
4412                               GetWindowLongW( hwnd, GWL_STYLE ) & ~WS_BORDER );
4413         }
4414
4415         return TRUE;
4416 }
4417
4418 /*********************************************************************
4419  *
4420  *      WM_PAINT
4421  *
4422  */
4423 static void EDIT_WM_Paint(EDITSTATE *es, WPARAM wParam)
4424 {
4425         PAINTSTRUCT ps;
4426         INT i;
4427         HDC dc;
4428         HFONT old_font = 0;
4429         RECT rc;
4430         RECT rcLine;
4431         RECT rcRgn;
4432         BOOL rev = es->bEnableState &&
4433                                 ((es->flags & EF_FOCUSED) ||
4434                                         (es->style & ES_NOHIDESEL));
4435         if (!wParam)
4436             dc = BeginPaint(es->hwndSelf, &ps);
4437         else
4438             dc = (HDC) wParam;
4439         if(es->style & WS_BORDER) {
4440                 GetClientRect(es->hwndSelf, &rc);
4441                 if(es->style & ES_MULTILINE) {
4442                         if(es->style & WS_HSCROLL) rc.bottom++;
4443                         if(es->style & WS_VSCROLL) rc.right++;
4444                 }
4445                 Rectangle(dc, rc.left, rc.top, rc.right, rc.bottom);
4446         }
4447         IntersectClipRect(dc, es->format_rect.left,
4448                                 es->format_rect.top,
4449                                 es->format_rect.right,
4450                                 es->format_rect.bottom);
4451         if (es->style & ES_MULTILINE) {
4452                 GetClientRect(es->hwndSelf, &rc);
4453                 IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
4454         }
4455         if (es->font)
4456                 old_font = SelectObject(dc, es->font);
4457         EDIT_NotifyCtlColor(es, dc);
4458
4459         if (!es->bEnableState)
4460                 SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT));
4461         GetClipBox(dc, &rcRgn);
4462         if (es->style & ES_MULTILINE) {
4463                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4464                 for (i = es->y_offset ; i <= min(es->y_offset + vlc, es->y_offset + es->line_count - 1) ; i++) {
4465                         EDIT_GetLineRect(es, i, 0, -1, &rcLine);
4466                         if (IntersectRect(&rc, &rcRgn, &rcLine))
4467                                 EDIT_PaintLine(es, dc, i, rev);
4468                 }
4469         } else {
4470                 EDIT_GetLineRect(es, 0, 0, -1, &rcLine);
4471                 if (IntersectRect(&rc, &rcRgn, &rcLine))
4472                         EDIT_PaintLine(es, dc, 0, rev);
4473         }
4474         if (es->font)
4475                 SelectObject(dc, old_font);
4476
4477         if (!wParam)
4478             EndPaint(es->hwndSelf, &ps);
4479 }
4480
4481
4482 /*********************************************************************
4483  *
4484  *      WM_PASTE
4485  *
4486  */
4487 static void EDIT_WM_Paste(EDITSTATE *es)
4488 {
4489         HGLOBAL hsrc;
4490         LPWSTR src;
4491
4492         /* Protect read-only edit control from modification */
4493         if(es->style & ES_READONLY)
4494             return;
4495
4496         OpenClipboard(es->hwndSelf);
4497         if ((hsrc = GetClipboardData(CF_UNICODETEXT))) {
4498                 src = (LPWSTR)GlobalLock(hsrc);
4499                 EDIT_EM_ReplaceSel(es, TRUE, src, TRUE, TRUE);
4500                 GlobalUnlock(hsrc);
4501         }
4502         CloseClipboard();
4503 }
4504
4505
4506 /*********************************************************************
4507  *
4508  *      WM_SETFOCUS
4509  *
4510  */
4511 static void EDIT_WM_SetFocus(EDITSTATE *es)
4512 {
4513         es->flags |= EF_FOCUSED;
4514         CreateCaret(es->hwndSelf, 0, 2, es->line_height);
4515         EDIT_SetCaretPos(es, es->selection_end,
4516                          es->flags & EF_AFTER_WRAP);
4517         if(!(es->style & ES_NOHIDESEL))
4518                 EDIT_InvalidateText(es, es->selection_start, es->selection_end);
4519         ShowCaret(es->hwndSelf);
4520         EDIT_NOTIFY_PARENT(es, EN_SETFOCUS, "EN_SETFOCUS");
4521 }
4522
4523
4524 /*********************************************************************
4525  *
4526  *      WM_SETFONT
4527  *
4528  * With Win95 look the margins are set to default font value unless
4529  * the system font (font == 0) is being set, in which case they are left
4530  * unchanged.
4531  *
4532  */
4533 static void EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw)
4534 {
4535         TEXTMETRICW tm;
4536         HDC dc;
4537         HFONT old_font = 0;
4538         RECT r;
4539
4540         es->font = font;
4541         dc = GetDC(es->hwndSelf);
4542         if (font)
4543                 old_font = SelectObject(dc, font);
4544         GetTextMetricsW(dc, &tm);
4545         es->line_height = tm.tmHeight;
4546         es->char_width = tm.tmAveCharWidth;
4547         if (font)
4548                 SelectObject(dc, old_font);
4549         ReleaseDC(es->hwndSelf, dc);
4550         if (font && (TWEAK_WineLook > WIN31_LOOK))
4551                 EDIT_EM_SetMargins(es, EC_LEFTMARGIN | EC_RIGHTMARGIN,
4552                                    EC_USEFONTINFO, EC_USEFONTINFO);
4553
4554         /* Force the recalculation of the format rect for each font change */
4555         GetClientRect(es->hwndSelf, &r);
4556         EDIT_SetRectNP(es, &r);
4557
4558         if (es->style & ES_MULTILINE)
4559                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
4560         else
4561             EDIT_CalcLineWidth_SL(es);
4562
4563         if (redraw)
4564                 EDIT_UpdateText(es, NULL, TRUE);
4565         if (es->flags & EF_FOCUSED) {
4566                 DestroyCaret();
4567                 CreateCaret(es->hwndSelf, 0, 2, es->line_height);
4568                 EDIT_SetCaretPos(es, es->selection_end,
4569                                  es->flags & EF_AFTER_WRAP);
4570                 ShowCaret(es->hwndSelf);
4571         }
4572 }
4573
4574
4575 /*********************************************************************
4576  *
4577  *      WM_SETTEXT
4578  *
4579  * NOTES
4580  *  For multiline controls (ES_MULTILINE), reception of WM_SETTEXT triggers:
4581  *  The modified flag is reset. No notifications are sent.
4582  *
4583  *  For single-line controls, reception of WM_SETTEXT triggers:
4584  *  The modified flag is reset. EN_UPDATE and EN_CHANGE notifications are sent.
4585  *
4586  */
4587 static void EDIT_WM_SetText(EDITSTATE *es, LPARAM lParam, BOOL unicode)
4588 {
4589     LPWSTR text = NULL;
4590
4591     if(unicode)
4592         text = (LPWSTR)lParam;
4593     else if (lParam)
4594     {
4595         LPCSTR textA = (LPCSTR)lParam;
4596         INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
4597         if((text = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
4598             MultiByteToWideChar(CP_ACP, 0, textA, -1, text, countW);
4599     }
4600
4601         EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
4602         if (text) {
4603                 TRACE("%s\n", debugstr_w(text));
4604                 EDIT_EM_ReplaceSel(es, FALSE, text, FALSE, FALSE);
4605                 if(!unicode)
4606                     HeapFree(GetProcessHeap(), 0, text);
4607         } else {
4608                 static const WCHAR empty_stringW[] = {0};
4609                 TRACE("<NULL>\n");
4610                 EDIT_EM_ReplaceSel(es, FALSE, empty_stringW, FALSE, FALSE);
4611         }
4612         es->x_offset = 0;
4613         es->flags &= ~EF_MODIFIED;
4614         EDIT_EM_SetSel(es, 0, 0, FALSE);
4615         /* Send the notification after the selection start and end have been set
4616          * edit control doesn't send notification on WM_SETTEXT
4617          * if it is multiline, or it is part of combobox
4618          */
4619         if( !((es->style & ES_MULTILINE) || es->hwndListBox))
4620        {
4621             EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
4622            EDIT_NOTIFY_PARENT(es, EN_UPDATE, "EN_UPDATE");
4623        }
4624         EDIT_EM_ScrollCaret(es);
4625 }
4626
4627
4628 /*********************************************************************
4629  *
4630  *      WM_SIZE
4631  *
4632  */
4633 static void EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height)
4634 {
4635         if ((action == SIZE_MAXIMIZED) || (action == SIZE_RESTORED)) {
4636                 RECT rc;
4637                 TRACE("width = %d, height = %d\n", width, height);
4638                 SetRect(&rc, 0, 0, width, height);
4639                 EDIT_SetRectNP(es, &rc);
4640                 EDIT_UpdateText(es, NULL, TRUE);
4641         }
4642 }
4643
4644
4645 /*********************************************************************
4646  *
4647  *      WM_STYLECHANGED
4648  *
4649  * This message is sent by SetWindowLong on having changed either the Style
4650  * or the extended style.
4651  *
4652  * We ensure that the window's version of the styles and the EDITSTATE's agree.
4653  *
4654  * See also EDIT_WM_NCCreate
4655  *
4656  * It appears that the Windows version of the edit control allows the style
4657  * (as retrieved by GetWindowLong) to be any value and maintains an internal
4658  * style variable which will generally be different.  In this function we
4659  * update the internal style based on what changed in the externally visible
4660  * style.
4661  *
4662  * Much of this content as based upon the MSDN, especially:
4663  *  Platform SDK Documentation -> User Interface Services ->
4664  *      Windows User Interface -> Edit Controls -> Edit Control Reference ->
4665  *      Edit Control Styles
4666  */
4667 static LRESULT  EDIT_WM_StyleChanged ( EDITSTATE *es, WPARAM which, const STYLESTRUCT *style)
4668 {
4669         if (GWL_STYLE == which) {
4670                 DWORD style_change_mask;
4671                 DWORD new_style;
4672                 /* Only a subset of changes can be applied after the control
4673                  * has been created.
4674                  */
4675                 style_change_mask = ES_UPPERCASE | ES_LOWERCASE |
4676                                     ES_NUMBER;
4677                 if (es->style & ES_MULTILINE)
4678                         style_change_mask |= ES_WANTRETURN;
4679
4680                 new_style = style->styleNew & style_change_mask;
4681
4682                 /* Number overrides lowercase overrides uppercase (at least it
4683                  * does in Win95).  However I'll bet that ES_NUMBER would be
4684                  * invalid under Win 3.1.
4685                  */
4686                 if (new_style & ES_NUMBER) {
4687                         ; /* do not override the ES_NUMBER */
4688                 }  else if (new_style & ES_LOWERCASE) {
4689                         new_style &= ~ES_UPPERCASE;
4690                 }
4691
4692                 es->style = (es->style & ~style_change_mask) | new_style;
4693         } else if (GWL_EXSTYLE == which) {
4694                 ; /* FIXME - what is needed here */
4695         } else {
4696                 WARN ("Invalid style change %d\n",which);
4697         }
4698
4699         return 0;
4700 }
4701
4702 /*********************************************************************
4703  *
4704  *      WM_SYSKEYDOWN
4705  *
4706  */
4707 static LRESULT EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data)
4708 {
4709         if ((key == VK_BACK) && (key_data & 0x2000)) {
4710                 if (EDIT_EM_CanUndo(es))
4711                         EDIT_EM_Undo(es);
4712                 return 0;
4713         } else if (key == VK_UP || key == VK_DOWN) {
4714                 if (EDIT_CheckCombo(es, WM_SYSKEYDOWN, key))
4715                         return 0;
4716         }
4717         return DefWindowProcW(es->hwndSelf, WM_SYSKEYDOWN, (WPARAM)key, (LPARAM)key_data);
4718 }
4719
4720
4721 /*********************************************************************
4722  *
4723  *      WM_TIMER
4724  *
4725  */
4726 static void EDIT_WM_Timer(EDITSTATE *es)
4727 {
4728         if (es->region_posx < 0) {
4729                 EDIT_MoveBackward(es, TRUE);
4730         } else if (es->region_posx > 0) {
4731                 EDIT_MoveForward(es, TRUE);
4732         }
4733 /*
4734  *      FIXME: gotta do some vertical scrolling here, like
4735  *              EDIT_EM_LineScroll(hwnd, 0, 1);
4736  */
4737 }
4738
4739 /*********************************************************************
4740  *
4741  *      WM_VSCROLL
4742  *
4743  */
4744 static LRESULT EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos)
4745 {
4746         INT dy;
4747
4748         if (!(es->style & ES_MULTILINE))
4749                 return 0;
4750
4751         if (!(es->style & ES_AUTOVSCROLL))
4752                 return 0;
4753
4754         dy = 0;
4755         switch (action) {
4756         case SB_LINEUP:
4757         case SB_LINEDOWN:
4758         case SB_PAGEUP:
4759         case SB_PAGEDOWN:
4760                 TRACE("action %d\n", action);
4761                 EDIT_EM_Scroll(es, action);
4762                 return 0;
4763         case SB_TOP:
4764                 TRACE("SB_TOP\n");
4765                 dy = -es->y_offset;
4766                 break;
4767         case SB_BOTTOM:
4768                 TRACE("SB_BOTTOM\n");
4769                 dy = es->line_count - 1 - es->y_offset;
4770                 break;
4771         case SB_THUMBTRACK:
4772                 TRACE("SB_THUMBTRACK %d\n", pos);
4773                 es->flags |= EF_VSCROLL_TRACK;
4774                 if(es->style & WS_VSCROLL)
4775                     dy = pos - es->y_offset;
4776                 else
4777                 {
4778                     /* Assume default scroll range 0-100 */
4779                     INT vlc, new_y;
4780                     /* Sanity check */
4781                     if(pos < 0 || pos > 100) return 0;
4782                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4783                     new_y = pos * (es->line_count - vlc) / 100;
4784                     dy = es->line_count ? (new_y - es->y_offset) : 0;
4785                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
4786                             es->line_count, es->y_offset, pos, dy);
4787                 }
4788                 break;
4789         case SB_THUMBPOSITION:
4790                 TRACE("SB_THUMBPOSITION %d\n", pos);
4791                 es->flags &= ~EF_VSCROLL_TRACK;
4792                 if(es->style & WS_VSCROLL)
4793                     dy = pos - es->y_offset;
4794                 else
4795                 {
4796                     /* Assume default scroll range 0-100 */
4797                     INT vlc, new_y;
4798                     /* Sanity check */
4799                     if(pos < 0 || pos > 100) return 0;
4800                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4801                     new_y = pos * (es->line_count - vlc) / 100;
4802                     dy = es->line_count ? (new_y - es->y_offset) : 0;
4803                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
4804                             es->line_count, es->y_offset, pos, dy);
4805                 }
4806                 if (!dy)
4807                 {
4808                         /* force scroll info update */
4809                         EDIT_UpdateScrollInfo(es);
4810                         EDIT_NOTIFY_PARENT(es, EN_VSCROLL, "EN_VSCROLL");
4811                 }
4812                 break;
4813         case SB_ENDSCROLL:
4814                 TRACE("SB_ENDSCROLL\n");
4815                 break;
4816         /*
4817          *      FIXME : the next two are undocumented !
4818          *      Are we doing the right thing ?
4819          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
4820          *      although it's also a regular control message.
4821          */
4822         case EM_GETTHUMB: /* this one is used by NT notepad */
4823         case EM_GETTHUMB16:
4824         {
4825                 LRESULT ret;
4826                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_VSCROLL)
4827                     ret = GetScrollPos(es->hwndSelf, SB_VERT);
4828                 else
4829                 {
4830                     /* Assume default scroll range 0-100 */
4831                     INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4832                     ret = es->line_count ? es->y_offset * 100 / (es->line_count - vlc) : 0;
4833                 }
4834                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
4835                 return ret;
4836         }
4837         case EM_LINESCROLL16:
4838                 TRACE("EM_LINESCROLL16 %d\n", pos);
4839                 dy = pos;
4840                 break;
4841
4842         default:
4843                 ERR("undocumented WM_VSCROLL action %d (0x%04x), please report\n",
4844                     action, action);
4845                 return 0;
4846         }
4847         if (dy)
4848                 EDIT_EM_LineScroll(es, 0, dy);
4849         return 0;
4850 }
4851
4852 /*********************************************************************
4853  *
4854  *      EDIT_UpdateText
4855  *
4856  */
4857 static void EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase)
4858 {
4859     if (es->flags & EF_UPDATE) EDIT_NOTIFY_PARENT(es, EN_UPDATE, "EN_UPDATE");
4860     InvalidateRgn(es->hwndSelf, hrgn, bErase);
4861 }
4862
4863
4864 /*********************************************************************
4865  *
4866  *      EDIT_UpdateText
4867  *
4868  */
4869 static void EDIT_UpdateText(EDITSTATE *es, LPRECT rc, BOOL bErase)
4870 {
4871     if (es->flags & EF_UPDATE) EDIT_NOTIFY_PARENT(es, EN_UPDATE, "EN_UPDATE");
4872     InvalidateRect(es->hwndSelf, rc, bErase);
4873 }