dlls/user32/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  *
  23  * NOTES
  24  *
  25  * This code was audited for completeness against the documented features
  26  * of Comctl32.dll version 6.0 on Oct. 8, 2004, by Dimitrie O. Paun.
  27  *
  28  * Unless otherwise noted, we believe this code to be complete, as per
  29  * the specification mentioned above.
  30  * If you discover missing features, or bugs, please note them below.
  31  *
  32  * TODO:
  33  *   - EDITBALLOONTIP structure
  34  *   - EM_GETCUEBANNER/Edit_GetCueBannerText
  35  *   - EM_HIDEBALLOONTIP/Edit_HideBalloonTip
  36  *   - EM_SETCUEBANNER/Edit_SetCueBannerText
  37  *   - EM_SHOWBALLOONTIP/Edit_ShowBalloonTip
  38  *   - EM_GETIMESTATUS, EM_SETIMESTATUS
  39  *   - EN_ALIGN_LTR_EC
  40  *   - EN_ALIGN_RTL_EC
  41  *   - ES_OEMCONVERT
  42  *
  43  */
  44
  45 #include "config.h"
  46
  47 #include <stdarg.h>
  48 #include <string.h>
  49 #include <stdlib.h>
  50
  51 #include "windef.h"
  52 #include "winbase.h"
  53 #include "winnt.h"
  54 #include "wownt32.h"
  55 #include "win.h"
  56 #include "imm.h"
  57 #include "wine/winbase16.h"
  58 #include "wine/winuser16.h"
  59 #include "wine/unicode.h"
  60 #include "controls.h"
  61 #include "user_private.h"
  62 #include "wine/debug.h"
  63
  64 WINE_DEFAULT_DEBUG_CHANNEL(edit);
  65 WINE_DECLARE_DEBUG_CHANNEL(combo);
  66 WINE_DECLARE_DEBUG_CHANNEL(relay);
  67
  68 #define BUFLIMIT_MULTI          65534   /* maximum buffer size (not including '\0')
  69                                            FIXME: BTW, new specs say 65535 (do you dare ???) */
  70 #define BUFLIMIT_SINGLE         32766   /* maximum buffer size (not including '\0') */
  71 #define GROWLENGTH              32      /* buffers granularity in bytes: must be power of 2 */
  72 #define ROUND_TO_GROW(size)     (((size) + (GROWLENGTH - 1)) & ~(GROWLENGTH - 1))
  73 #define HSCROLL_FRACTION        3       /* scroll window by 1/3 width */
  74
  75 /*
  76  *      extra flags for EDITSTATE.flags field
  77  */
  78 #define EF_MODIFIED             0x0001  /* text has been modified */
  79 #define EF_FOCUSED              0x0002  /* we have input focus */
  80 #define EF_UPDATE               0x0004  /* notify parent of changed state */
  81 #define EF_VSCROLL_TRACK        0x0008  /* don't SetScrollPos() since we are tracking the thumb */
  82 #define EF_HSCROLL_TRACK        0x0010  /* don't SetScrollPos() since we are tracking the thumb */
  83 #define EF_AFTER_WRAP           0x0080  /* the caret is displayed after the last character of a
  84                                            wrapped line, instead of in front of the next character */
  85 #define EF_USE_SOFTBRK          0x0100  /* Enable soft breaks in text. */
  86 #define EF_APP_HAS_HANDLE       0x0200  /* Set when an app sends EM_[G|S]ETHANDLE.  We are in sole control of
  87                                            the text buffer if this is clear. */
  88 typedef enum
  89 {
  90         END_0 = 0,                      /* line ends with terminating '\0' character */
  91         END_WRAP,                       /* line is wrapped */
  92         END_HARD,                       /* line ends with a hard return '\r\n' */
  93         END_SOFT,                       /* line ends with a soft return '\r\r\n' */
  94         END_RICH                        /* line ends with a single '\n' */
  95 } LINE_END;
  96
  97 typedef struct tagLINEDEF {
  98         INT length;                     /* bruto length of a line in bytes */
  99         INT net_length;                 /* netto length of a line in visible characters */
 100         LINE_END ending;
 101         INT width;                      /* width of the line in pixels */
 102         INT index;                      /* line index into the buffer */
 103         struct tagLINEDEF *next;
 104 } LINEDEF;
 105
 106 typedef struct
 107 {
 108         BOOL is_unicode;                /* how the control was created */
 109         LPWSTR text;                    /* the actual contents of the control */
 110         UINT text_length;               /* cached length of text buffer (in WCHARs) - use get_text_length() to retrieve */
 111         UINT buffer_size;               /* the size of the buffer in characters */
 112         UINT buffer_limit;              /* the maximum size to which the buffer may grow in characters */
 113         HFONT font;                     /* NULL means standard system font */
 114         INT x_offset;                   /* scroll offset        for multi lines this is in pixels
 115                                                                 for single lines it's in characters */
 116         INT line_height;                /* height of a screen line in pixels */
 117         INT char_width;                 /* average character width in pixels */
 118         DWORD style;                    /* sane version of wnd->dwStyle */
 119         WORD flags;                     /* flags that are not in es->style or wnd->flags (EF_XXX) */
 120         INT undo_insert_count;          /* number of characters inserted in sequence */
 121         UINT undo_position;             /* character index of the insertion and deletion */
 122         LPWSTR undo_text;               /* deleted text */
 123         UINT undo_buffer_size;          /* size of the deleted text buffer */
 124         INT selection_start;            /* == selection_end if no selection */
 125         INT selection_end;              /* == current caret position */
 126         WCHAR password_char;            /* == 0 if no password char, and for multi line controls */
 127         INT left_margin;                /* in pixels */
 128         INT right_margin;               /* in pixels */
 129         RECT format_rect;
 130         INT text_width;                 /* width of the widest line in pixels for multi line controls
 131                                            and just line width for single line controls */
 132         INT region_posx;                /* Position of cursor relative to region: */
 133         INT region_posy;                /* -1: to left, 0: within, 1: to right */
 134         EDITWORDBREAKPROC16 word_break_proc16;
 135         void *word_break_proc;          /* 32-bit word break proc: ANSI or Unicode */
 136         INT line_count;                 /* number of lines */
 137         INT y_offset;                   /* scroll offset in number of lines */
 138         BOOL bCaptureState;             /* flag indicating whether mouse was captured */
 139         BOOL bEnableState;              /* flag keeping the enable state */
 140         HWND hwndSelf;                  /* the our window handle */
 141         HWND hwndParent;                /* Handle of parent for sending EN_* messages.
 142                                            Even if parent will change, EN_* messages
 143                                            should be sent to the first parent. */
 144         HWND hwndListBox;               /* handle of ComboBox's listbox or NULL */
 145         /*
 146          *      only for multi line controls
 147          */
 148         INT lock_count;                 /* amount of re-entries in the EditWndProc */
 149         INT tabs_count;
 150         LPINT tabs;
 151         LINEDEF *first_line_def;        /* linked list of (soft) linebreaks */
 152         HLOCAL hloc32W;                 /* our unicode local memory block */
 153         HLOCAL16 hloc16;                /* alias for 16-bit control receiving EM_GETHANDLE16
 154                                            or EM_SETHANDLE16 */
 155         HLOCAL hloc32A;                 /* alias for ANSI control receiving EM_GETHANDLE
 156                                            or EM_SETHANDLE */
 157         /*
 158          * IME Data
 159          */
 160         UINT composition_len;   /* length of composition, 0 == no composition */
 161         int composition_start;  /* the character position for the composition */
 162 } EDITSTATE;
 163
 164
 165 #define SWAP_UINT32(x,y) do { UINT temp = (UINT)(x); (x) = (UINT)(y); (y) = temp; } while(0)
 166 #define ORDER_UINT(x,y) do { if ((UINT)(y) < (UINT)(x)) SWAP_UINT32((x),(y)); } while(0)
 167
 168 /* used for disabled or read-only edit control */
 169 #define EDIT_NOTIFY_PARENT(es, wNotifyCode) \
 170         do \
 171         { /* Notify parent which has created this edit control */ \
 172             TRACE("notification " #wNotifyCode " sent to hwnd=%p\n", es->hwndParent); \
 173             SendMessageW(es->hwndParent, WM_COMMAND, \
 174                      MAKEWPARAM(GetWindowLongPtrW((es->hwndSelf),GWLP_ID), wNotifyCode), \
 175                      (LPARAM)(es->hwndSelf)); \
 176         } while(0)
 177
 178 /*********************************************************************
 179  *
 180  *      Declarations
 181  *
 182  */
 183
 184 /*
 185  *      These functions have trivial implementations
 186  *      We still like to call them internally
 187  *      "static inline" makes them more like macro's
 188  */
 189 static inline BOOL      EDIT_EM_CanUndo(EDITSTATE *es);
 190 static inline void      EDIT_EM_EmptyUndoBuffer(EDITSTATE *es);
 191 static inline void      EDIT_WM_Clear(EDITSTATE *es);
 192 static inline void      EDIT_WM_Cut(EDITSTATE *es);
 193
 194 /*
 195  *      Helper functions only valid for one type of control
 196  */
 197 static void     EDIT_BuildLineDefs_ML(EDITSTATE *es, INT iStart, INT iEnd, INT delta, HRGN hrgn);
 198 static void     EDIT_CalcLineWidth_SL(EDITSTATE *es);
 199 static LPWSTR   EDIT_GetPasswordPointer_SL(EDITSTATE *es);
 200 static void     EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend);
 201 static void     EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend);
 202 static void     EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend);
 203 static void     EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend);
 204 /*
 205  *      Helper functions valid for both single line _and_ multi line controls
 206  */
 207 static INT      EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action);
 208 static INT      EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap);
 209 static void     EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y);
 210 static void     EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc);
 211 static void     EDIT_InvalidateText(EDITSTATE *es, INT start, INT end);
 212 static void     EDIT_LockBuffer(EDITSTATE *es);
 213 static BOOL     EDIT_MakeFit(EDITSTATE *es, UINT size);
 214 static BOOL     EDIT_MakeUndoFit(EDITSTATE *es, UINT size);
 215 static void     EDIT_MoveBackward(EDITSTATE *es, BOOL extend);
 216 static void     EDIT_MoveEnd(EDITSTATE *es, BOOL extend);
 217 static void     EDIT_MoveForward(EDITSTATE *es, BOOL extend);
 218 static void     EDIT_MoveHome(EDITSTATE *es, BOOL extend);
 219 static void     EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend);
 220 static void     EDIT_MoveWordForward(EDITSTATE *es, BOOL extend);
 221 static void     EDIT_PaintLine(EDITSTATE *es, HDC hdc, INT line, BOOL rev);
 222 static INT      EDIT_PaintText(EDITSTATE *es, HDC hdc, INT x, INT y, INT line, INT col, INT count, BOOL rev);
 223 static void     EDIT_SetCaretPos(EDITSTATE *es, INT pos, BOOL after_wrap);
 224 static void     EDIT_AdjustFormatRect(EDITSTATE *es);
 225 static void     EDIT_SetRectNP(EDITSTATE *es, LPRECT lprc);
 226 static void     EDIT_UnlockBuffer(EDITSTATE *es, BOOL force);
 227 static void     EDIT_UpdateScrollInfo(EDITSTATE *es);
 228 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action);
 229 /*
 230  *      EM_XXX message handlers
 231  */
 232 static LRESULT  EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y);
 233 static BOOL     EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol);
 234 static HLOCAL   EDIT_EM_GetHandle(EDITSTATE *es);
 235 static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es);
 236 static INT      EDIT_EM_GetLine(EDITSTATE *es, INT line, LPWSTR dst, BOOL unicode);
 237 static LRESULT  EDIT_EM_GetSel(EDITSTATE *es, PUINT start, PUINT end);
 238 static LRESULT  EDIT_EM_GetThumb(EDITSTATE *es);
 239 static INT      EDIT_EM_LineFromChar(EDITSTATE *es, INT index);
 240 static INT      EDIT_EM_LineIndex(EDITSTATE *es, INT line);
 241 static INT      EDIT_EM_LineLength(EDITSTATE *es, INT index);
 242 static BOOL     EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy);
 243 static BOOL     EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy);
 244 static LRESULT  EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap);
 245 static void     EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit);
 246 static LRESULT  EDIT_EM_Scroll(EDITSTATE *es, INT action);
 247 static void     EDIT_EM_ScrollCaret(EDITSTATE *es);
 248 static void     EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc);
 249 static void     EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc);
 250 static void     EDIT_EM_SetLimitText(EDITSTATE *es, INT limit);
 251 static void     EDIT_EM_SetMargins(EDITSTATE *es, INT action, WORD left, WORD right, BOOL repaint);
 252 static void     EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c);
 253 static void     EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap);
 254 static BOOL     EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs);
 255 static BOOL     EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs);
 256 static void     EDIT_EM_SetWordBreakProc(EDITSTATE *es, void *wbp);
 257 static void     EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp);
 258 static BOOL     EDIT_EM_Undo(EDITSTATE *es);
 259 /*
 260  *      WM_XXX message handlers
 261  */
 262 static void     EDIT_WM_Char(EDITSTATE *es, WCHAR c);
 263 static void     EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND conrtol);
 264 static void     EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y);
 265 static void     EDIT_WM_Copy(EDITSTATE *es);
 266 static LRESULT  EDIT_WM_Create(EDITSTATE *es, LPCWSTR name);
 267 static LRESULT  EDIT_WM_Destroy(EDITSTATE *es);
 268 static LRESULT  EDIT_WM_EraseBkGnd(EDITSTATE *es, HDC dc);
 269 static INT      EDIT_WM_GetText(EDITSTATE *es, INT count, LPWSTR dst, BOOL unicode);
 270 static LRESULT  EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos);
 271 static LRESULT  EDIT_WM_KeyDown(EDITSTATE *es, INT key);
 272 static LRESULT  EDIT_WM_KillFocus(EDITSTATE *es);
 273 static LRESULT  EDIT_WM_LButtonDblClk(EDITSTATE *es);
 274 static LRESULT  EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y);
 275 static LRESULT  EDIT_WM_LButtonUp(EDITSTATE *es);
 276 static LRESULT  EDIT_WM_MButtonDown(EDITSTATE *es);
 277 static LRESULT  EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y);
 278 static LRESULT  EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode);
 279 static void     EDIT_WM_Paint(EDITSTATE *es, HDC hdc);
 280 static void     EDIT_WM_Paste(EDITSTATE *es);
 281 static void     EDIT_WM_SetFocus(EDITSTATE *es);
 282 static void     EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw);
 283 static void     EDIT_WM_SetText(EDITSTATE *es, LPCWSTR text, BOOL unicode);
 284 static void     EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height);
 285 static LRESULT  EDIT_WM_StyleChanged(EDITSTATE *es, WPARAM which, const STYLESTRUCT *style);
 286 static LRESULT  EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data);
 287 static void     EDIT_WM_Timer(EDITSTATE *es);
 288 static LRESULT  EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos);
 289 static void     EDIT_UpdateText(EDITSTATE *es, LPRECT rc, BOOL bErase);
 290 static void     EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase);
 291 static void EDIT_ImeComposition(HWND hwnd, LPARAM CompFlag, EDITSTATE *es);
 292
 293 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 294 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 295
 296 /*********************************************************************
 297  * edit class descriptor
 298  */
 299 const struct builtin_class_descr EDIT_builtin_class =
 300 {
 301     "Edit",               /* name */
 302     CS_DBLCLKS | CS_PARENTDC,   /* style */
 303     EditWndProcA,         /* procA */
 304     EditWndProcW,         /* procW */
 305     sizeof(EDITSTATE *),  /* extra */
 306     IDC_IBEAM,            /* cursor */
 307     0                     /* brush */
 308 };
 309
 310
 311 /*********************************************************************
 312  *
 313  *      EM_CANUNDO
 314  *
 315  */
 316 static inline BOOL EDIT_EM_CanUndo(EDITSTATE *es)
 317 {
 318         return (es->undo_insert_count || strlenW(es->undo_text));
 319 }
 320
 321
 322 /*********************************************************************
 323  *
 324  *      EM_EMPTYUNDOBUFFER
 325  *
 326  */
 327 static inline void EDIT_EM_EmptyUndoBuffer(EDITSTATE *es)
 328 {
 329         es->undo_insert_count = 0;
 330         *es->undo_text = '\0';
 331 }
 332
 333
 334 /*********************************************************************
 335  *
 336  *      WM_CLEAR
 337  *
 338  */
 339 static inline void EDIT_WM_Clear(EDITSTATE *es)
 340 {
 341         static const WCHAR empty_stringW[] = {0};
 342
 343         /* Protect read-only edit control from modification */
 344         if(es->style & ES_READONLY)
 345             return;
 346
 347         EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
 348 }
 349
 350
 351 /*********************************************************************
 352  *
 353  *      WM_CUT
 354  *
 355  */
 356 static inline void EDIT_WM_Cut(EDITSTATE *es)
 357 {
 358         EDIT_WM_Copy(es);
 359         EDIT_WM_Clear(es);
 360 }
 361
 362
 363 /**********************************************************************
 364  *         get_app_version
 365  *
 366  * Returns the window version in case Wine emulates a later version
 367  * of windows than the application expects.
 368  *
 369  * In a number of cases when windows runs an application that was
 370  * designed for an earlier windows version, windows reverts
 371  * to "old" behaviour of that earlier version.
 372  *
 373  * An example is a disabled  edit control that needs to be painted.
 374  * Old style behaviour is to send a WM_CTLCOLOREDIT message. This was
 375  * changed in Win95, NT4.0 by a WM_CTLCOLORSTATIC message _only_ for
 376  * applications with an expected version 0f 4.0 or higher.
 377  *
 378  */
 379 static DWORD get_app_version(void)
 380 {
 381     static DWORD version;
 382     if (!version)
 383     {
 384         DWORD dwEmulatedVersion;
 385         OSVERSIONINFOW info;
 386         DWORD dwProcVersion = GetProcessVersion(0);
 387
 388         info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);
 389         GetVersionExW( &info );
 390         dwEmulatedVersion = MAKELONG( info.dwMinorVersion, info.dwMajorVersion );
 391         /* FIXME: this may not be 100% correct; see discussion on the
 392          * wine developer list in Nov 1999 */
 393         version = dwProcVersion < dwEmulatedVersion ? dwProcVersion : dwEmulatedVersion;
 394     }
 395     return version;
 396 }
 397
 398 static inline UINT get_text_length(EDITSTATE *es)
 399 {
 400     if(es->text_length == (UINT)-1)
 401         es->text_length = strlenW(es->text);
 402     return es->text_length;
 403 }
 404
 405 static inline void text_buffer_changed(EDITSTATE *es)
 406 {
 407     es->text_length = (UINT)-1;
 408 }
 409
 410 static HBRUSH EDIT_NotifyCtlColor(EDITSTATE *es, HDC hdc)
 411 {
 412         HBRUSH hbrush;
 413         UINT msg;
 414
 415         if ( get_app_version() >= 0x40000 && (!es->bEnableState || (es->style & ES_READONLY)))
 416                 msg = WM_CTLCOLORSTATIC;
 417         else
 418                 msg = WM_CTLCOLOREDIT;
 419
 420         /* why do we notify to es->hwndParent, and we send this one to GetParent()? */
 421         hbrush = (HBRUSH)SendMessageW(GetParent(es->hwndSelf), msg, (WPARAM)hdc, (LPARAM)es->hwndSelf);
 422         if (!hbrush)
 423             hbrush = (HBRUSH)DefWindowProcW(GetParent(es->hwndSelf), msg, (WPARAM)hdc, (LPARAM)es->hwndSelf);
 424         return hbrush;
 425 }
 426
 427 static inline LRESULT DefWindowProcT(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam, BOOL unicode)
 428 {
 429         if(unicode)
 430                 return DefWindowProcW(hwnd, msg, wParam, lParam);
 431         else
 432                 return DefWindowProcA(hwnd, msg, wParam, lParam);
 433 }
 434
 435 /*********************************************************************
 436  *
 437  *      EditWndProc_common
 438  *
 439  *      The messages are in the order of the actual integer values
 440  *      (which can be found in include/windows.h)
 441  *      Wherever possible the 16 bit versions are converted to
 442  *      the 32 bit ones, so that we can 'fall through' to the
 443  *      helper functions.  These are mostly 32 bit (with a few
 444  *      exceptions, clearly indicated by a '16' extension to their
 445  *      names).
 446  *
 447  */
 448 static LRESULT WINAPI EditWndProc_common( HWND hwnd, UINT msg,
 449                                           WPARAM wParam, LPARAM lParam, BOOL unicode )
 450 {
 451         EDITSTATE *es = (EDITSTATE *)GetWindowLongPtrW( hwnd, 0 );
 452         LRESULT result = 0;
 453
 454         TRACE("hwnd=%p msg=%x (%s) wparam=%lx lparam=%lx\n", hwnd, msg, SPY_GetMsgName(msg, hwnd), wParam, lParam);
 455
 456         if (!es && msg != WM_NCCREATE)
 457                 return DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
 458
 459         if (es && (msg != WM_DESTROY)) EDIT_LockBuffer(es);
 460
 461         switch (msg) {
 462         case EM_GETSEL16:
 463                 wParam = 0;
 464                 lParam = 0;
 465                 /* fall through */
 466         case EM_GETSEL:
 467                 result = EDIT_EM_GetSel(es, (PUINT)wParam, (PUINT)lParam);
 468                 break;
 469
 470         case EM_SETSEL16:
 471                 if ((short)LOWORD(lParam) == -1)
 472                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
 473                 else
 474                         EDIT_EM_SetSel(es, LOWORD(lParam), HIWORD(lParam), FALSE);
 475                 if (!wParam)
 476                         EDIT_EM_ScrollCaret(es);
 477                 result = 1;
 478                 break;
 479         case EM_SETSEL:
 480                 EDIT_EM_SetSel(es, wParam, lParam, FALSE);
 481                 EDIT_EM_ScrollCaret(es);
 482                 result = 1;
 483                 break;
 484
 485         case EM_GETRECT16:
 486                 if (lParam)
 487                 {
 488                     RECT16 *r16 = MapSL(lParam);
 489                     r16->left   = es->format_rect.left;
 490                     r16->top    = es->format_rect.top;
 491                     r16->right  = es->format_rect.right;
 492                     r16->bottom = es->format_rect.bottom;
 493                 }
 494                 break;
 495         case EM_GETRECT:
 496                 if (lParam)
 497                         CopyRect((LPRECT)lParam, &es->format_rect);
 498                 break;
 499
 500         case EM_SETRECT16:
 501                 if ((es->style & ES_MULTILINE) && lParam) {
 502                         RECT rc;
 503                         RECT16 *r16 = MapSL(lParam);
 504                         rc.left   = r16->left;
 505                         rc.top    = r16->top;
 506                         rc.right  = r16->right;
 507                         rc.bottom = r16->bottom;
 508                         EDIT_SetRectNP(es, &rc);
 509                         EDIT_UpdateText(es, NULL, TRUE);
 510                 }
 511                 break;
 512         case EM_SETRECT:
 513                 if ((es->style & ES_MULTILINE) && lParam) {
 514                         EDIT_SetRectNP(es, (LPRECT)lParam);
 515                         EDIT_UpdateText(es, NULL, TRUE);
 516                 }
 517                 break;
 518
 519         case EM_SETRECTNP16:
 520                 if ((es->style & ES_MULTILINE) && lParam) {
 521                         RECT rc;
 522                         RECT16 *r16 = MapSL(lParam);
 523                         rc.left   = r16->left;
 524                         rc.top    = r16->top;
 525                         rc.right  = r16->right;
 526                         rc.bottom = r16->bottom;
 527                         EDIT_SetRectNP(es, &rc);
 528                 }
 529                 break;
 530         case EM_SETRECTNP:
 531                 if ((es->style & ES_MULTILINE) && lParam)
 532                         EDIT_SetRectNP(es, (LPRECT)lParam);
 533                 break;
 534
 535         case EM_SCROLL16:
 536         case EM_SCROLL:
 537                 result = EDIT_EM_Scroll(es, (INT)wParam);
 538                 break;
 539
 540         case EM_LINESCROLL16:
 541                 wParam = (WPARAM)(INT)(SHORT)HIWORD(lParam);
 542                 lParam = (LPARAM)(INT)(SHORT)LOWORD(lParam);
 543                 /* fall through */
 544         case EM_LINESCROLL:
 545                 result = (LRESULT)EDIT_EM_LineScroll(es, (INT)wParam, (INT)lParam);
 546                 break;
 547
 548         case EM_SCROLLCARET16:
 549         case EM_SCROLLCARET:
 550                 EDIT_EM_ScrollCaret(es);
 551                 result = 1;
 552                 break;
 553
 554         case EM_GETMODIFY16:
 555         case EM_GETMODIFY:
 556                 result = ((es->flags & EF_MODIFIED) != 0);
 557                 break;
 558
 559         case EM_SETMODIFY16:
 560         case EM_SETMODIFY:
 561                 if (wParam)
 562                         es->flags |= EF_MODIFIED;
 563                 else
 564                         es->flags &= ~(EF_MODIFIED | EF_UPDATE);  /* reset pending updates */
 565                 break;
 566
 567         case EM_GETLINECOUNT16:
 568         case EM_GETLINECOUNT:
 569                 result = (es->style & ES_MULTILINE) ? es->line_count : 1;
 570                 break;
 571
 572         case EM_LINEINDEX16:
 573                 if ((INT16)wParam == -1)
 574                         wParam = (WPARAM)-1;
 575                 /* fall through */
 576         case EM_LINEINDEX:
 577                 result = (LRESULT)EDIT_EM_LineIndex(es, (INT)wParam);
 578                 break;
 579
 580         case EM_SETHANDLE16:
 581                 EDIT_EM_SetHandle16(es, (HLOCAL16)wParam);
 582                 break;
 583         case EM_SETHANDLE:
 584                 EDIT_EM_SetHandle(es, (HLOCAL)wParam);
 585                 break;
 586
 587         case EM_GETHANDLE16:
 588                 result = (LRESULT)EDIT_EM_GetHandle16(es);
 589                 break;
 590         case EM_GETHANDLE:
 591                 result = (LRESULT)EDIT_EM_GetHandle(es);
 592                 break;
 593
 594         case EM_GETTHUMB16:
 595         case EM_GETTHUMB:
 596                 result = EDIT_EM_GetThumb(es);
 597                 break;
 598
 599         /* these messages missing from specs */
 600         case WM_USER+15:
 601         case 0x00bf:
 602         case WM_USER+16:
 603         case 0x00c0:
 604         case WM_USER+19:
 605         case 0x00c3:
 606         case WM_USER+26:
 607         case 0x00ca:
 608                 FIXME("undocumented message 0x%x, please report\n", msg);
 609                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 610                 break;
 611
 612         case EM_LINELENGTH16:
 613         case EM_LINELENGTH:
 614                 result = (LRESULT)EDIT_EM_LineLength(es, (INT)wParam);
 615                 break;
 616
 617         case EM_REPLACESEL16:
 618                 lParam = (LPARAM)MapSL(lParam);
 619                 unicode = FALSE;  /* 16-bit message is always ascii */
 620                 /* fall through */
 621         case EM_REPLACESEL:
 622         {
 623                 LPWSTR textW;
 624
 625                 if(unicode)
 626                     textW = (LPWSTR)lParam;
 627                 else
 628                 {
 629                     LPSTR textA = (LPSTR)lParam;
 630                     INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
 631                     if((textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 632                         MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
 633                 }
 634
 635                 EDIT_EM_ReplaceSel(es, (BOOL)wParam, textW, TRUE, TRUE);
 636                 result = 1;
 637
 638                 if(!unicode)
 639                     HeapFree(GetProcessHeap(), 0, textW);
 640                 break;
 641         }
 642
 643         case EM_GETLINE16:
 644                 lParam = (LPARAM)MapSL(lParam);
 645                 unicode = FALSE;  /* 16-bit message is always ascii */
 646                 /* fall through */
 647         case EM_GETLINE:
 648                 result = (LRESULT)EDIT_EM_GetLine(es, (INT)wParam, (LPWSTR)lParam, unicode);
 649                 break;
 650
 651         case EM_LIMITTEXT16:
 652         case EM_SETLIMITTEXT:
 653                 EDIT_EM_SetLimitText(es, (INT)wParam);
 654                 break;
 655
 656         case EM_CANUNDO16:
 657         case EM_CANUNDO:
 658                 result = (LRESULT)EDIT_EM_CanUndo(es);
 659                 break;
 660
 661         case EM_UNDO16:
 662         case EM_UNDO:
 663         case WM_UNDO:
 664                 result = (LRESULT)EDIT_EM_Undo(es);
 665                 break;
 666
 667         case EM_FMTLINES16:
 668         case EM_FMTLINES:
 669                 result = (LRESULT)EDIT_EM_FmtLines(es, (BOOL)wParam);
 670                 break;
 671
 672         case EM_LINEFROMCHAR16:
 673         case EM_LINEFROMCHAR:
 674                 result = (LRESULT)EDIT_EM_LineFromChar(es, (INT)wParam);
 675                 break;
 676
 677         case EM_SETTABSTOPS16:
 678                 result = (LRESULT)EDIT_EM_SetTabStops16(es, (INT)wParam, MapSL(lParam));
 679                 break;
 680         case EM_SETTABSTOPS:
 681                 result = (LRESULT)EDIT_EM_SetTabStops(es, (INT)wParam, (LPINT)lParam);
 682                 break;
 683
 684         case EM_SETPASSWORDCHAR16:
 685                 unicode = FALSE;  /* 16-bit message is always ascii */
 686                 /* fall through */
 687         case EM_SETPASSWORDCHAR:
 688         {
 689                 WCHAR charW = 0;
 690
 691                 if(unicode)
 692                     charW = (WCHAR)wParam;
 693                 else
 694                 {
 695                     CHAR charA = wParam;
 696                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 697                 }
 698
 699                 EDIT_EM_SetPasswordChar(es, charW);
 700                 break;
 701         }
 702
 703         case EM_EMPTYUNDOBUFFER16:
 704         case EM_EMPTYUNDOBUFFER:
 705                 EDIT_EM_EmptyUndoBuffer(es);
 706                 break;
 707
 708         case EM_GETFIRSTVISIBLELINE16:
 709                 result = es->y_offset;
 710                 break;
 711         case EM_GETFIRSTVISIBLELINE:
 712                 result = (es->style & ES_MULTILINE) ? es->y_offset : es->x_offset;
 713                 break;
 714
 715         case EM_SETREADONLY16:
 716         case EM_SETREADONLY:
 717                 if (wParam) {
 718                     SetWindowLongW( hwnd, GWL_STYLE,
 719                                     GetWindowLongW( hwnd, GWL_STYLE ) | ES_READONLY );
 720                     es->style |= ES_READONLY;
 721                 } else {
 722                     SetWindowLongW( hwnd, GWL_STYLE,
 723                                     GetWindowLongW( hwnd, GWL_STYLE ) & ~ES_READONLY );
 724                     es->style &= ~ES_READONLY;
 725                 }
 726                 result = 1;
 727                 break;
 728
 729         case EM_SETWORDBREAKPROC16:
 730                 EDIT_EM_SetWordBreakProc16(es, (EDITWORDBREAKPROC16)lParam);
 731                 break;
 732         case EM_SETWORDBREAKPROC:
 733                 EDIT_EM_SetWordBreakProc(es, (void *)lParam);
 734                 break;
 735
 736         case EM_GETWORDBREAKPROC16:
 737                 result = (LRESULT)es->word_break_proc16;
 738                 break;
 739         case EM_GETWORDBREAKPROC:
 740                 result = (LRESULT)es->word_break_proc;
 741                 break;
 742
 743         case EM_GETPASSWORDCHAR16:
 744                 unicode = FALSE;  /* 16-bit message is always ascii */
 745                 /* fall through */
 746         case EM_GETPASSWORDCHAR:
 747         {
 748                 if(unicode)
 749                     result = es->password_char;
 750                 else
 751                 {
 752                     WCHAR charW = es->password_char;
 753                     CHAR charA = 0;
 754                     WideCharToMultiByte(CP_ACP, 0, &charW, 1, &charA, 1, NULL, NULL);
 755                     result = charA;
 756                 }
 757                 break;
 758         }
 759
 760         /* The following EM_xxx are new to win95 and don't exist for 16 bit */
 761
 762         case EM_SETMARGINS:
 763                 EDIT_EM_SetMargins(es, (INT)wParam, LOWORD(lParam), HIWORD(lParam), TRUE);
 764                 break;
 765
 766         case EM_GETMARGINS:
 767                 result = MAKELONG(es->left_margin, es->right_margin);
 768                 break;
 769
 770         case EM_GETLIMITTEXT:
 771                 result = es->buffer_limit;
 772                 break;
 773
 774         case EM_POSFROMCHAR:
 775                 if ((INT)wParam >= get_text_length(es)) result = -1;
 776                 else result = EDIT_EM_PosFromChar(es, (INT)wParam, FALSE);
 777                 break;
 778
 779         case EM_CHARFROMPOS:
 780                 result = EDIT_EM_CharFromPos(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
 781                 break;
 782
 783         /* End of the EM_ messages which were in numerical order; what order
 784          * are these in?  vaguely alphabetical?
 785          */
 786
 787         case WM_NCCREATE:
 788                 result = EDIT_WM_NCCreate(hwnd, (LPCREATESTRUCTW)lParam, unicode);
 789                 break;
 790
 791         case WM_DESTROY:
 792                 result = EDIT_WM_Destroy(es);
 793                 es = NULL;
 794                 break;
 795
 796         case WM_GETDLGCODE:
 797                 result = DLGC_HASSETSEL | DLGC_WANTCHARS | DLGC_WANTARROWS;
 798
 799                 if (es->style & ES_MULTILINE)
 800                 {
 801                    result |= DLGC_WANTALLKEYS;
 802                    break;
 803                 }
 804
 805                 if (lParam && (((LPMSG)lParam)->message == WM_KEYDOWN))
 806                 {
 807                    int vk = (int)((LPMSG)lParam)->wParam;
 808
 809                    if (es->hwndListBox && (vk == VK_RETURN || vk == VK_ESCAPE))
 810                    {
 811                       if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 812                          result |= DLGC_WANTMESSAGE;
 813                    }
 814                 }
 815                 break;
 816
 817         case WM_IME_CHAR:
 818             if (!unicode)
 819             {
 820                 WCHAR charW;
 821                 CHAR  strng[2];
 822
 823                 strng[0] = wParam >> 8;
 824                 strng[1] = wParam & 0xff;
 825                 if (strng[0]) MultiByteToWideChar(CP_ACP, 0, strng, 2, &charW, 1);
 826                 else MultiByteToWideChar(CP_ACP, 0, &strng[1], 1, &charW, 1);
 827                 EDIT_WM_Char(es, charW);
 828                 break;
 829             }
 830             /* fall through */
 831         case WM_CHAR:
 832         {
 833                 WCHAR charW;
 834
 835                 if(unicode)
 836                     charW = wParam;
 837                 else
 838                 {
 839                     CHAR charA = wParam;
 840                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 841                 }
 842
 843                 if ((charW == VK_RETURN || charW == VK_ESCAPE) && es->hwndListBox)
 844                 {
 845                    if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 846                       SendMessageW(GetParent(hwnd), WM_KEYDOWN, charW, 0);
 847                    break;
 848                 }
 849                 EDIT_WM_Char(es, charW);
 850                 break;
 851         }
 852
 853         case WM_CLEAR:
 854                 EDIT_WM_Clear(es);
 855                 break;
 856
 857         case WM_COMMAND:
 858                 EDIT_WM_Command(es, HIWORD(wParam), LOWORD(wParam), (HWND)lParam);
 859                 break;
 860
 861         case WM_CONTEXTMENU:
 862                 EDIT_WM_ContextMenu(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
 863                 break;
 864
 865         case WM_COPY:
 866                 EDIT_WM_Copy(es);
 867                 break;
 868
 869         case WM_CREATE:
 870                 if(unicode)
 871                     result = EDIT_WM_Create(es, ((LPCREATESTRUCTW)lParam)->lpszName);
 872                 else
 873                 {
 874                     LPCSTR nameA = ((LPCREATESTRUCTA)lParam)->lpszName;
 875                     LPWSTR nameW = NULL;
 876                     if(nameA)
 877                     {
 878                         INT countW = MultiByteToWideChar(CP_ACP, 0, nameA, -1, NULL, 0);
 879                         if((nameW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 880                             MultiByteToWideChar(CP_ACP, 0, nameA, -1, nameW, countW);
 881                     }
 882                     result = EDIT_WM_Create(es, nameW);
 883                     HeapFree(GetProcessHeap(), 0, nameW);
 884                 }
 885                 break;
 886
 887         case WM_CUT:
 888                 EDIT_WM_Cut(es);
 889                 break;
 890
 891         case WM_ENABLE:
 892                 es->bEnableState = (BOOL) wParam;
 893                 EDIT_UpdateText(es, NULL, TRUE);
 894                 break;
 895
 896         case WM_ERASEBKGND:
 897                 result = EDIT_WM_EraseBkGnd(es, (HDC)wParam);
 898                 break;
 899
 900         case WM_GETFONT:
 901                 result = (LRESULT)es->font;
 902                 break;
 903
 904         case WM_GETTEXT:
 905                 result = (LRESULT)EDIT_WM_GetText(es, (INT)wParam, (LPWSTR)lParam, unicode);
 906                 break;
 907
 908         case WM_GETTEXTLENGTH:
 909                 if (unicode) result = get_text_length(es);
 910                 else result = WideCharToMultiByte( CP_ACP, 0, es->text, get_text_length(es),
 911                                                    NULL, 0, NULL, NULL );
 912                 break;
 913
 914         case WM_HSCROLL:
 915                 result = EDIT_WM_HScroll(es, LOWORD(wParam), (short)HIWORD(wParam));
 916                 break;
 917
 918         case WM_KEYDOWN:
 919                 result = EDIT_WM_KeyDown(es, (INT)wParam);
 920                 break;
 921
 922         case WM_KILLFOCUS:
 923                 result = EDIT_WM_KillFocus(es);
 924                 break;
 925
 926         case WM_LBUTTONDBLCLK:
 927                 result = EDIT_WM_LButtonDblClk(es);
 928                 break;
 929
 930         case WM_LBUTTONDOWN:
 931                 result = EDIT_WM_LButtonDown(es, wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
 932                 break;
 933
 934         case WM_LBUTTONUP:
 935                 result = EDIT_WM_LButtonUp(es);
 936                 break;
 937
 938         case WM_MBUTTONDOWN:
 939                 result = EDIT_WM_MButtonDown(es);
 940                 break;
 941
 942         case WM_MOUSEMOVE:
 943                 result = EDIT_WM_MouseMove(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
 944                 break;
 945
 946         case WM_PRINTCLIENT:
 947         case WM_PAINT:
 948                 EDIT_WM_Paint(es, (HDC)wParam);
 949                 break;
 950
 951         case WM_PASTE:
 952                 EDIT_WM_Paste(es);
 953                 break;
 954
 955         case WM_SETFOCUS:
 956                 EDIT_WM_SetFocus(es);
 957                 break;
 958
 959         case WM_SETFONT:
 960                 EDIT_WM_SetFont(es, (HFONT)wParam, LOWORD(lParam) != 0);
 961                 break;
 962
 963         case WM_SETREDRAW:
 964                 /* FIXME: actually set an internal flag and behave accordingly */
 965                 break;
 966
 967         case WM_SETTEXT:
 968                 EDIT_WM_SetText(es, (LPCWSTR)lParam, unicode);
 969                 result = TRUE;
 970                 break;
 971
 972         case WM_SIZE:
 973                 EDIT_WM_Size(es, (UINT)wParam, LOWORD(lParam), HIWORD(lParam));
 974                 break;
 975
 976         case WM_STYLECHANGED:
 977                 result = EDIT_WM_StyleChanged(es, wParam, (const STYLESTRUCT *)lParam);
 978                 break;
 979
 980         case WM_STYLECHANGING:
 981                 result = 0; /* See EDIT_WM_StyleChanged */
 982                 break;
 983
 984         case WM_SYSKEYDOWN:
 985                 result = EDIT_WM_SysKeyDown(es, (INT)wParam, (DWORD)lParam);
 986                 break;
 987
 988         case WM_TIMER:
 989                 EDIT_WM_Timer(es);
 990                 break;
 991
 992         case WM_VSCROLL:
 993                 result = EDIT_WM_VScroll(es, LOWORD(wParam), (short)HIWORD(wParam));
 994                 break;
 995
 996         case WM_MOUSEWHEEL:
 997                 {
 998                     int gcWheelDelta = 0;
 999                     UINT pulScrollLines = 3;
1000                     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
1001
1002                     if (wParam & (MK_SHIFT | MK_CONTROL)) {
1003                         result = DefWindowProcW(hwnd, msg, wParam, lParam);
1004                         break;
1005                     }
1006                     gcWheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
1007                     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
1008                     {
1009                         int cLineScroll= (int) min((UINT) es->line_count, pulScrollLines);
1010                         cLineScroll *= (gcWheelDelta / WHEEL_DELTA);
1011                         result = EDIT_EM_LineScroll(es, 0, cLineScroll);
1012                     }
1013                 }
1014                 break;
1015
1016
1017         /* IME messages to make the edit control IME aware */
1018         case WM_IME_SETCONTEXT:
1019                 break;
1020
1021         case WM_IME_STARTCOMPOSITION:
1022         /*
1023          * FIXME in IME: This message is not always sent like it should be
1024          */
1025                 if (es->selection_start != es->selection_end)
1026                 {
1027                         static const WCHAR empty_stringW[] = {0};
1028                         EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
1029                 }
1030                 es->composition_start = es->selection_end;
1031                 es->composition_len = 0;
1032                 break;
1033
1034         case WM_IME_COMPOSITION:
1035                 if (es->composition_len == 0)
1036                 {
1037                         if (es->selection_start != es->selection_end)
1038                         {
1039                                 static const WCHAR empty_stringW[] = {0};
1040                                 EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
1041                         }
1042
1043                         es->composition_start = es->selection_end;
1044                 }
1045                 EDIT_ImeComposition(hwnd,lParam,es);
1046                 break;
1047
1048         case WM_IME_ENDCOMPOSITION:
1049                 es->composition_len= 0;
1050                 break;
1051
1052         case WM_IME_COMPOSITIONFULL:
1053                 break;
1054
1055         case WM_IME_SELECT:
1056                 break;
1057
1058         case WM_IME_CONTROL:
1059                 break;
1060
1061         default:
1062                 result = DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
1063                 break;
1064         }
1065
1066         if (es) EDIT_UnlockBuffer(es, FALSE);
1067
1068         TRACE("hwnd=%p msg=%x (%s) -- 0x%08lx\n", hwnd, msg, SPY_GetMsgName(msg, hwnd), result);
1069
1070         return result;
1071 }
1072
1073 /*********************************************************************
1074  *
1075  *      EditWndProcW   (USER32.@)
1076  */
1077 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
1078 {
1079     return EditWndProc_common(hWnd, uMsg, wParam, lParam, TRUE);
1080 }
1081
1082 /*********************************************************************
1083  *
1084  *      EditWndProc   (USER32.@)
1085  */
1086 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
1087 {
1088     return EditWndProc_common(hWnd, uMsg, wParam, lParam, FALSE);
1089 }
1090
1091 /*********************************************************************
1092  *
1093  *      EDIT_BuildLineDefs_ML
1094  *
1095  *      Build linked list of text lines.
1096  *      Lines can end with '\0' (last line), a character (if it is wrapped),
1097  *      a soft return '\r\r\n' or a hard return '\r\n'
1098  *
1099  */
1100 static void EDIT_BuildLineDefs_ML(EDITSTATE *es, INT istart, INT iend, INT delta, HRGN hrgn)
1101 {
1102         HDC dc;
1103         HFONT old_font = 0;
1104         LPWSTR current_position, cp;
1105         INT fw;
1106         LINEDEF *current_line;
1107         LINEDEF *previous_line;
1108         LINEDEF *start_line;
1109         INT line_index = 0, nstart_line = 0, nstart_index = 0;
1110         INT line_count = es->line_count;
1111         INT orig_net_length;
1112         RECT rc;
1113
1114         if (istart == iend && delta == 0)
1115                 return;
1116
1117         dc = GetDC(es->hwndSelf);
1118         if (es->font)
1119                 old_font = SelectObject(dc, es->font);
1120
1121         previous_line = NULL;
1122         current_line = es->first_line_def;
1123
1124         /* Find starting line. istart must lie inside an existing line or
1125          * at the end of buffer */
1126         do {
1127                 if (istart < current_line->index + current_line->length ||
1128                                 current_line->ending == END_0)
1129                         break;
1130
1131                 previous_line = current_line;
1132                 current_line = current_line->next;
1133                 line_index++;
1134         } while (current_line);
1135
1136         if (!current_line) /* Error occurred start is not inside previous buffer */
1137         {
1138                 FIXME(" modification occurred outside buffer\n");
1139                 ReleaseDC(es->hwndSelf, dc);
1140                 return;
1141         }
1142
1143         /* Remember start of modifications in order to calculate update region */
1144         nstart_line = line_index;
1145         nstart_index = current_line->index;
1146
1147         /* We must start to reformat from the previous line since the modifications
1148          * may have caused the line to wrap upwards. */
1149         if (!(es->style & ES_AUTOHSCROLL) && line_index > 0)
1150         {
1151                 line_index--;
1152                 current_line = previous_line;
1153         }
1154         start_line = current_line;
1155
1156         fw = es->format_rect.right - es->format_rect.left;
1157         current_position = es->text + current_line->index;
1158         do {
1159                 if (current_line != start_line)
1160                 {
1161                         if (!current_line || current_line->index + delta > current_position - es->text)
1162                         {
1163                                 /* The buffer has been expanded, create a new line and
1164                                    insert it into the link list */
1165                                 LINEDEF *new_line = HeapAlloc(GetProcessHeap(), 0, sizeof(LINEDEF));
1166                                 new_line->next = previous_line->next;
1167                                 previous_line->next = new_line;
1168                                 current_line = new_line;
1169                                 es->line_count++;
1170                         }
1171                         else if (current_line->index + delta < current_position - es->text)
1172                         {
1173                                 /* The previous line merged with this line so we delete this extra entry */
1174                                 previous_line->next = current_line->next;
1175                                 HeapFree(GetProcessHeap(), 0, current_line);
1176                                 current_line = previous_line->next;
1177                                 es->line_count--;
1178                                 continue;
1179                         }
1180                         else /* current_line->index + delta == current_position */
1181                         {
1182                                 if (current_position - es->text > iend)
1183                                         break; /* We reached end of line modifications */
1184                                 /* else recalulate this line */
1185                         }
1186                 }
1187
1188                 current_line->index = current_position - es->text;
1189                 orig_net_length = current_line->net_length;
1190
1191                 /* Find end of line */
1192                 cp = current_position;
1193                 while (*cp) {
1194                     if (*cp == '\n') break;
1195                         if ((*cp == '\r') && (*(cp + 1) == '\n'))
1196                                 break;
1197                         cp++;
1198                 }
1199
1200                 /* Mark type of line termination */
1201                 if (!(*cp)) {
1202                         current_line->ending = END_0;
1203                         current_line->net_length = strlenW(current_position);
1204                 } else if ((cp > current_position) && (*(cp - 1) == '\r')) {
1205                         current_line->ending = END_SOFT;
1206                         current_line->net_length = cp - current_position - 1;
1207                 } else if (*cp == '\n') {
1208                         current_line->ending = END_RICH;
1209                         current_line->net_length = cp - current_position;
1210                 } else {
1211                         current_line->ending = END_HARD;
1212                         current_line->net_length = cp - current_position;
1213                 }
1214
1215                 /* Calculate line width */
1216                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1217                                         current_position, current_line->net_length,
1218                                         es->tabs_count, es->tabs));
1219
1220                 /* FIXME: check here for lines that are too wide even in AUTOHSCROLL (> 32767 ???) */
1221                 if (!(es->style & ES_AUTOHSCROLL)) {
1222                    if (current_line->width > fw) {
1223                         INT next = 0;
1224                         INT prev;
1225                         do {
1226                                 prev = next;
1227                                 next = EDIT_CallWordBreakProc(es, current_position - es->text,
1228                                                 prev + 1, current_line->net_length, WB_RIGHT);
1229                                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1230                                                         current_position, next, es->tabs_count, es->tabs));
1231                         } while (current_line->width <= fw);
1232                         if (!prev) { /* Didn't find a line break so force a break */
1233                                 next = 0;
1234                                 do {
1235                                         prev = next;
1236                                         next++;
1237                                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1238                                                                 current_position, next, es->tabs_count, es->tabs));
1239                                 } while (current_line->width <= fw);
1240                                 if (!prev)
1241                                         prev = 1;
1242                         }
1243
1244                         /* If the first line we are calculating, wrapped before istart, we must
1245                          * adjust istart in order for this to be reflected in the update region. */
1246                         if (current_line->index == nstart_index && istart > current_line->index + prev)
1247                                 istart = current_line->index + prev;
1248                         /* else if we are updating the previous line before the first line we
1249                          * are re-calculating and it expanded */
1250                         else if (current_line == start_line &&
1251                                         current_line->index != nstart_index && orig_net_length < prev)
1252                         {
1253                           /* Line expanded due to an upwards line wrap so we must partially include
1254                            * previous line in update region */
1255                                 nstart_line = line_index;
1256                                 nstart_index = current_line->index;
1257                                 istart = current_line->index + orig_net_length;
1258                         }
1259
1260                         current_line->net_length = prev;
1261                         current_line->ending = END_WRAP;
1262                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc, current_position,
1263                                         current_line->net_length, es->tabs_count, es->tabs));
1264                     }
1265                     else if (orig_net_length <  current_line->net_length  &&
1266                         current_line == start_line &&
1267                         current_line->index != nstart_index) {
1268                         /* The previous line expanded but it's still not as wide as the client rect */
1269                         /* The expansion is due to an upwards line wrap so we must partially include
1270                            it in the update region */
1271                         nstart_line = line_index;
1272                         nstart_index = current_line->index;
1273                         istart = current_line->index + orig_net_length;
1274                     }
1275                 }
1276
1277
1278                 /* Adjust length to include line termination */
1279                 switch (current_line->ending) {
1280                 case END_SOFT:
1281                         current_line->length = current_line->net_length + 3;
1282                         break;
1283                 case END_RICH:
1284                         current_line->length = current_line->net_length + 1;
1285                         break;
1286                 case END_HARD:
1287                         current_line->length = current_line->net_length + 2;
1288                         break;
1289                 case END_WRAP:
1290                 case END_0:
1291                         current_line->length = current_line->net_length;
1292                         break;
1293                 }
1294                 es->text_width = max(es->text_width, current_line->width);
1295                 current_position += current_line->length;
1296                 previous_line = current_line;
1297                 current_line = current_line->next;
1298                 line_index++;
1299         } while (previous_line->ending != END_0);
1300
1301         /* Finish adjusting line indexes by delta or remove hanging lines */
1302         if (previous_line->ending == END_0)
1303         {
1304                 LINEDEF *pnext = NULL;
1305
1306                 previous_line->next = NULL;
1307                 while (current_line)
1308                 {
1309                         pnext = current_line->next;
1310                         HeapFree(GetProcessHeap(), 0, current_line);
1311                         current_line = pnext;
1312                         es->line_count--;
1313                 }
1314         }
1315         else if (delta != 0)
1316         {
1317                 while (current_line)
1318                 {
1319                         current_line->index += delta;
1320                         current_line = current_line->next;
1321                 }
1322         }
1323
1324         /* Calculate rest of modification rectangle */
1325         if (hrgn)
1326         {
1327                 HRGN tmphrgn;
1328            /*
1329                 * We calculate two rectangles. One for the first line which may have
1330                 * an indent with respect to the format rect. The other is a format-width
1331                 * rectangle that spans the rest of the lines that changed or moved.
1332                 */
1333                 rc.top = es->format_rect.top + nstart_line * es->line_height -
1334                         (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1335                 rc.bottom = rc.top + es->line_height;
1336                 if ((es->style & ES_CENTER) || (es->style & ES_RIGHT))
1337                         rc.left = es->format_rect.left;
1338                 else
1339                         rc.left = es->format_rect.left + (INT)LOWORD(GetTabbedTextExtentW(dc,
1340                                         es->text + nstart_index, istart - nstart_index,
1341                                         es->tabs_count, es->tabs)) - es->x_offset; /* Adjust for horz scroll */
1342                 rc.right = es->format_rect.right;
1343                 SetRectRgn(hrgn, rc.left, rc.top, rc.right, rc.bottom);
1344
1345                 rc.top = rc.bottom;
1346                 rc.left = es->format_rect.left;
1347                 rc.right = es->format_rect.right;
1348            /*
1349                 * If lines were added or removed we must re-paint the remainder of the
1350             * lines since the remaining lines were either shifted up or down.
1351                 */
1352                 if (line_count < es->line_count) /* We added lines */
1353                         rc.bottom = es->line_count * es->line_height;
1354                 else if (line_count > es->line_count) /* We removed lines */
1355                         rc.bottom = line_count * es->line_height;
1356                 else
1357                         rc.bottom = line_index * es->line_height;
1358                 rc.bottom += es->format_rect.top;
1359                 rc.bottom -= (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1360                 tmphrgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
1361                 CombineRgn(hrgn, hrgn, tmphrgn, RGN_OR);
1362                 DeleteObject(tmphrgn);
1363         }
1364
1365         if (es->font)
1366                 SelectObject(dc, old_font);
1367
1368         ReleaseDC(es->hwndSelf, dc);
1369 }
1370
1371 /*********************************************************************
1372  *
1373  *      EDIT_CalcLineWidth_SL
1374  *
1375  */
1376 static void EDIT_CalcLineWidth_SL(EDITSTATE *es)
1377 {
1378         SIZE size;
1379         LPWSTR text;
1380         HDC dc;
1381         HFONT old_font = 0;
1382
1383         text = EDIT_GetPasswordPointer_SL(es);
1384
1385         dc = GetDC(es->hwndSelf);
1386         if (es->font)
1387                 old_font = SelectObject(dc, es->font);
1388
1389         GetTextExtentPoint32W(dc, text, strlenW(text), &size);
1390
1391         if (es->font)
1392                 SelectObject(dc, old_font);
1393         ReleaseDC(es->hwndSelf, dc);
1394
1395         if (es->style & ES_PASSWORD)
1396                 HeapFree(GetProcessHeap(), 0, text);
1397
1398         es->text_width = size.cx;
1399 }
1400
1401 /*********************************************************************
1402  *
1403  *      EDIT_CallWordBreakProc
1404  *
1405  *      Call appropriate WordBreakProc (internal or external).
1406  *
1407  *      Note: The "start" argument should always be an index referring
1408  *              to es->text.  The actual wordbreak proc might be
1409  *              16 bit, so we can't always pass any 32 bit LPSTR.
1410  *              Hence we assume that es->text is the buffer that holds
1411  *              the string under examination (we can decide this for ourselves).
1412  *
1413  */
1414 static INT EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action)
1415 {
1416         INT ret;
1417
1418         if (es->word_break_proc16) {
1419             HGLOBAL16 hglob16;
1420             SEGPTR segptr;
1421             INT countA;
1422             WORD args[5];
1423             DWORD result;
1424
1425             countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1426             hglob16 = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT, countA);
1427             segptr = WOWGlobalLock16(hglob16);
1428             WideCharToMultiByte(CP_ACP, 0, es->text + start, count, MapSL(segptr), countA, NULL, NULL);
1429             args[4] = SELECTOROF(segptr);
1430             args[3] = OFFSETOF(segptr);
1431             args[2] = index;
1432             args[1] = countA;
1433             args[0] = action;
1434             WOWCallback16Ex((DWORD)es->word_break_proc16, WCB16_PASCAL, sizeof(args), args, &result);
1435             ret = LOWORD(result);
1436             GlobalUnlock16(hglob16);
1437             GlobalFree16(hglob16);
1438         }
1439         else if (es->word_break_proc)
1440         {
1441             if(es->is_unicode)
1442             {
1443                 EDITWORDBREAKPROCW wbpW = (EDITWORDBREAKPROCW)es->word_break_proc;
1444
1445                 TRACE_(relay)("(UNICODE wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1446                         es->word_break_proc, debugstr_wn(es->text + start, count), index, count, action);
1447                 ret = wbpW(es->text + start, index, count, action);
1448             }
1449             else
1450             {
1451                 EDITWORDBREAKPROCA wbpA = (EDITWORDBREAKPROCA)es->word_break_proc;
1452                 INT countA;
1453                 CHAR *textA;
1454
1455                 countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1456                 textA = HeapAlloc(GetProcessHeap(), 0, countA);
1457                 WideCharToMultiByte(CP_ACP, 0, es->text + start, count, textA, countA, NULL, NULL);
1458                 TRACE_(relay)("(ANSI wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1459                         es->word_break_proc, debugstr_an(textA, countA), index, countA, action);
1460                 ret = wbpA(textA, index, countA, action);
1461                 HeapFree(GetProcessHeap(), 0, textA);
1462             }
1463         }
1464         else
1465             ret = EDIT_WordBreakProc(es->text + start, index, count, action);
1466
1467         return ret;
1468 }
1469
1470
1471 /*********************************************************************
1472  *
1473  *      EDIT_CharFromPos
1474  *
1475  *      Beware: This is not the function called on EM_CHARFROMPOS
1476  *              The position _can_ be outside the formatting / client
1477  *              rectangle
1478  *              The return value is only the character index
1479  *
1480  */
1481 static INT EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap)
1482 {
1483         INT index;
1484         HDC dc;
1485         HFONT old_font = 0;
1486         INT x_high = 0, x_low = 0;
1487
1488         if (es->style & ES_MULTILINE) {
1489                 INT line = (y - es->format_rect.top) / es->line_height + es->y_offset;
1490                 INT line_index = 0;
1491                 LINEDEF *line_def = es->first_line_def;
1492                 INT low, high;
1493                 while ((line > 0) && line_def->next) {
1494                         line_index += line_def->length;
1495                         line_def = line_def->next;
1496                         line--;
1497                 }
1498                 x += es->x_offset - es->format_rect.left;
1499                 if (es->style & ES_RIGHT)
1500                         x -= (es->format_rect.right - es->format_rect.left) - line_def->width;
1501                 else if (es->style & ES_CENTER)
1502                         x -= ((es->format_rect.right - es->format_rect.left) - line_def->width) / 2;
1503                 if (x >= line_def->width) {
1504                         if (after_wrap)
1505                                 *after_wrap = (line_def->ending == END_WRAP);
1506                         return line_index + line_def->net_length;
1507                 }
1508                 if (x <= 0) {
1509                         if (after_wrap)
1510                                 *after_wrap = FALSE;
1511                         return line_index;
1512                 }
1513                 dc = GetDC(es->hwndSelf);
1514                 if (es->font)
1515                         old_font = SelectObject(dc, es->font);
1516                     low = line_index;
1517                     high = line_index + line_def->net_length + 1;
1518                     while (low < high - 1)
1519                     {
1520                         INT mid = (low + high) / 2;
1521                         INT x_now = LOWORD(GetTabbedTextExtentW(dc, es->text + line_index, mid - line_index, es->tabs_count, es->tabs));
1522                         if (x_now > x) {
1523                             high = mid;
1524                             x_high = x_now;
1525                         } else {
1526                             low = mid;
1527                             x_low = x_now;
1528                         }
1529                     }
1530                     if (abs(x_high - x) + 1 <= abs(x_low - x))
1531                         index = high;
1532                     else
1533                         index = low;
1534
1535                 if (after_wrap)
1536                         *after_wrap = ((index == line_index + line_def->net_length) &&
1537                                                         (line_def->ending == END_WRAP));
1538         } else {
1539                 LPWSTR text;
1540                 SIZE size;
1541                 if (after_wrap)
1542                         *after_wrap = FALSE;
1543                 x -= es->format_rect.left;
1544                 if (!x)
1545                         return es->x_offset;
1546
1547                 if (!es->x_offset)
1548                 {
1549                         INT indent = (es->format_rect.right - es->format_rect.left) - es->text_width;
1550                         if (es->style & ES_RIGHT)
1551                                 x -= indent;
1552                         else if (es->style & ES_CENTER)
1553                                 x -= indent / 2;
1554                 }
1555
1556                 text = EDIT_GetPasswordPointer_SL(es);
1557                 dc = GetDC(es->hwndSelf);
1558                 if (es->font)
1559                         old_font = SelectObject(dc, es->font);
1560                 if (x < 0)
1561                 {
1562                     INT low = 0;
1563                     INT high = es->x_offset;
1564                     while (low < high - 1)
1565                     {
1566                         INT mid = (low + high) / 2;
1567                         GetTextExtentPoint32W( dc, text + mid,
1568                                                es->x_offset - mid, &size );
1569                         if (size.cx > -x) {
1570                             low = mid;
1571                             x_low = size.cx;
1572                         } else {
1573                             high = mid;
1574                             x_high = size.cx;
1575                         }
1576                     }
1577                     if (abs(x_high + x) <= abs(x_low + x) + 1)
1578                         index = high;
1579                     else
1580                         index = low;
1581                 }
1582                 else
1583                 {
1584                     INT low = es->x_offset;
1585                     INT high = get_text_length(es) + 1;
1586                     while (low < high - 1)
1587                     {
1588                         INT mid = (low + high) / 2;
1589                         GetTextExtentPoint32W( dc, text + es->x_offset,
1590                                                mid - es->x_offset, &size );
1591                         if (size.cx > x) {
1592                                high = mid;
1593                                x_high = size.cx;
1594                         } else {
1595                                low = mid;
1596                                x_low = size.cx;
1597                        }
1598                     }
1599                    if (abs(x_high - x) <= abs(x_low - x) + 1)
1600                        index = high;
1601                    else
1602                        index = low;
1603                 }
1604                 if (es->style & ES_PASSWORD)
1605                         HeapFree(GetProcessHeap(), 0, text);
1606         }
1607         if (es->font)
1608                 SelectObject(dc, old_font);
1609         ReleaseDC(es->hwndSelf, dc);
1610         return index;
1611 }
1612
1613
1614 /*********************************************************************
1615  *
1616  *      EDIT_ConfinePoint
1617  *
1618  *      adjusts the point to be within the formatting rectangle
1619  *      (so CharFromPos returns the nearest _visible_ character)
1620  *
1621  */
1622 static void EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y)
1623 {
1624         *x = min(max(*x, es->format_rect.left), es->format_rect.right - 1);
1625         *y = min(max(*y, es->format_rect.top), es->format_rect.bottom - 1);
1626 }
1627
1628
1629 /*********************************************************************
1630  *
1631  *      EDIT_GetLineRect
1632  *
1633  *      Calculates the bounding rectangle for a line from a starting
1634  *      column to an ending column.
1635  *
1636  */
1637 static void EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc)
1638 {
1639         INT line_index =  EDIT_EM_LineIndex(es, line);
1640
1641         if (es->style & ES_MULTILINE)
1642                 rc->top = es->format_rect.top + (line - es->y_offset) * es->line_height;
1643         else
1644                 rc->top = es->format_rect.top;
1645         rc->bottom = rc->top + es->line_height;
1646         rc->left = (scol == 0) ? es->format_rect.left : (short)LOWORD(EDIT_EM_PosFromChar(es, line_index + scol, TRUE));
1647         rc->right = (ecol == -1) ? es->format_rect.right : (short)LOWORD(EDIT_EM_PosFromChar(es, line_index + ecol, TRUE));
1648 }
1649
1650
1651 /*********************************************************************
1652  *
1653  *      EDIT_GetPasswordPointer_SL
1654  *
1655  *      note: caller should free the (optionally) allocated buffer
1656  *
1657  */
1658 static LPWSTR EDIT_GetPasswordPointer_SL(EDITSTATE *es)
1659 {
1660         if (es->style & ES_PASSWORD) {
1661                 INT len = get_text_length(es);
1662                 LPWSTR text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
1663                 text[len] = '\0';
1664                 while(len) text[--len] = es->password_char;
1665                 return text;
1666         } else
1667                 return es->text;
1668 }
1669
1670
1671 /*********************************************************************
1672  *
1673  *      EDIT_LockBuffer
1674  *
1675  *      This acts as a LocalLock16(), but it locks only once.  This way
1676  *      you can call it whenever you like, without unlocking.
1677  *
1678  *      Initially the edit control allocates a HLOCAL32 buffer
1679  *      (32 bit linear memory handler).  However, 16 bit application
1680  *      might send an EM_GETHANDLE message and expect a HLOCAL16 (16 bit SEG:OFF
1681  *      handler).  From that moment on we have to keep using this 16 bit memory
1682  *      handler, because it is supposed to be valid at all times after EM_GETHANDLE.
1683  *      What we do is create a HLOCAL16 buffer, copy the text, and do pointer
1684  *      conversion.
1685  *
1686  */
1687 static void EDIT_LockBuffer(EDITSTATE *es)
1688 {
1689         STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
1690         HINSTANCE16 hInstance = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
1691
1692         if (!es->text) {
1693             CHAR *textA = NULL;
1694             UINT countA = 0;
1695             BOOL _16bit = FALSE;
1696
1697             if(es->hloc32W)
1698             {
1699                 if(es->hloc32A)
1700                 {
1701                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
1702                     textA = LocalLock(es->hloc32A);
1703                     countA = strlen(textA) + 1;
1704                 }
1705                 else if(es->hloc16)
1706                 {
1707                     HANDLE16 oldDS = stack16->ds;
1708                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
1709                     stack16->ds = hInstance;
1710                     textA = MapSL(LocalLock16(es->hloc16));
1711                     stack16->ds = oldDS;
1712                     countA = strlen(textA) + 1;
1713                     _16bit = TRUE;
1714                 }
1715             }
1716             else {
1717                 ERR("no buffer ... please report\n");
1718                 return;
1719             }
1720
1721             if(textA)
1722             {
1723                 HLOCAL hloc32W_new;
1724                 UINT countW_new = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
1725                 TRACE("%d bytes translated to %d WCHARs\n", countA, countW_new);
1726                 if(countW_new > es->buffer_size + 1)
1727                 {
1728                     UINT alloc_size = ROUND_TO_GROW(countW_new * sizeof(WCHAR));
1729                     TRACE("Resizing 32-bit UNICODE buffer from %d+1 to %d WCHARs\n", es->buffer_size, countW_new);
1730                     hloc32W_new = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
1731                     if(hloc32W_new)
1732                     {
1733                         es->hloc32W = hloc32W_new;
1734                         es->buffer_size = LocalSize(hloc32W_new)/sizeof(WCHAR) - 1;
1735                         TRACE("Real new size %d+1 WCHARs\n", es->buffer_size);
1736                     }
1737                     else
1738                         WARN("FAILED! Will synchronize partially\n");
1739                 }
1740             }
1741
1742             /*TRACE("Locking 32-bit UNICODE buffer\n");*/
1743             es->text = LocalLock(es->hloc32W);
1744
1745             if(textA)
1746             {
1747                 MultiByteToWideChar(CP_ACP, 0, textA, countA, es->text, es->buffer_size + 1);
1748                 if(_16bit)
1749                 {
1750                     HANDLE16 oldDS = stack16->ds;
1751                     stack16->ds = hInstance;
1752                     LocalUnlock16(es->hloc16);
1753                     stack16->ds = oldDS;
1754                 }
1755                 else
1756                     LocalUnlock(es->hloc32A);
1757             }
1758         }
1759         if(es->flags & EF_APP_HAS_HANDLE) text_buffer_changed(es);
1760         es->lock_count++;
1761 }
1762
1763
1764 /*********************************************************************
1765  *
1766  *      EDIT_SL_InvalidateText
1767  *
1768  *      Called from EDIT_InvalidateText().
1769  *      Does the job for single-line controls only.
1770  *
1771  */
1772 static void EDIT_SL_InvalidateText(EDITSTATE *es, INT start, INT end)
1773 {
1774         RECT line_rect;
1775         RECT rc;
1776
1777         EDIT_GetLineRect(es, 0, start, end, &line_rect);
1778         if (IntersectRect(&rc, &line_rect, &es->format_rect))
1779                 EDIT_UpdateText(es, &rc, TRUE);
1780 }
1781
1782
1783 /*********************************************************************
1784  *
1785  *      EDIT_ML_InvalidateText
1786  *
1787  *      Called from EDIT_InvalidateText().
1788  *      Does the job for multi-line controls only.
1789  *
1790  */
1791 static void EDIT_ML_InvalidateText(EDITSTATE *es, INT start, INT end)
1792 {
1793         INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
1794         INT sl = EDIT_EM_LineFromChar(es, start);
1795         INT el = EDIT_EM_LineFromChar(es, end);
1796         INT sc;
1797         INT ec;
1798         RECT rc1;
1799         RECT rcWnd;
1800         RECT rcLine;
1801         RECT rcUpdate;
1802         INT l;
1803
1804         if ((el < es->y_offset) || (sl > es->y_offset + vlc))
1805                 return;
1806
1807         sc = start - EDIT_EM_LineIndex(es, sl);
1808         ec = end - EDIT_EM_LineIndex(es, el);
1809         if (sl < es->y_offset) {
1810                 sl = es->y_offset;
1811                 sc = 0;
1812         }
1813         if (el > es->y_offset + vlc) {
1814                 el = es->y_offset + vlc;
1815                 ec = EDIT_EM_LineLength(es, EDIT_EM_LineIndex(es, el));
1816         }
1817         GetClientRect(es->hwndSelf, &rc1);
1818         IntersectRect(&rcWnd, &rc1, &es->format_rect);
1819         if (sl == el) {
1820                 EDIT_GetLineRect(es, sl, sc, ec, &rcLine);
1821                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1822                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1823         } else {
1824                 EDIT_GetLineRect(es, sl, sc,
1825                                 EDIT_EM_LineLength(es,
1826                                         EDIT_EM_LineIndex(es, sl)),
1827                                 &rcLine);
1828                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1829                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1830                 for (l = sl + 1 ; l < el ; l++) {
1831                         EDIT_GetLineRect(es, l, 0,
1832                                 EDIT_EM_LineLength(es,
1833                                         EDIT_EM_LineIndex(es, l)),
1834                                 &rcLine);
1835                         if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1836                                 EDIT_UpdateText(es, &rcUpdate, TRUE);
1837                 }
1838                 EDIT_GetLineRect(es, el, 0, ec, &rcLine);
1839                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1840                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1841         }
1842 }
1843
1844
1845 /*********************************************************************
1846  *
1847  *      EDIT_InvalidateText
1848  *
1849  *      Invalidate the text from offset start up to, but not including,
1850  *      offset end.  Useful for (re)painting the selection.
1851  *      Regions outside the linewidth are not invalidated.
1852  *      end == -1 means end == TextLength.
1853  *      start and end need not be ordered.
1854  *
1855  */
1856 static void EDIT_InvalidateText(EDITSTATE *es, INT start, INT end)
1857 {
1858         if (end == start)
1859                 return;
1860
1861         if (end == -1)
1862                 end = get_text_length(es);
1863
1864         if (end < start) {
1865             INT tmp = start;
1866             start = end;
1867             end = tmp;
1868         }
1869
1870         if (es->style & ES_MULTILINE)
1871                 EDIT_ML_InvalidateText(es, start, end);
1872         else
1873                 EDIT_SL_InvalidateText(es, start, end);
1874 }
1875
1876
1877 /*********************************************************************
1878  *
1879  *      EDIT_MakeFit
1880  *
1881  * Try to fit size + 1 characters in the buffer.
1882  */
1883 static BOOL EDIT_MakeFit(EDITSTATE *es, UINT size)
1884 {
1885         HLOCAL hNew32W;
1886
1887         if (size <= es->buffer_size)
1888                 return TRUE;
1889
1890         TRACE("trying to ReAlloc to %d+1 characters\n", size);
1891
1892         /* Force edit to unlock it's buffer. es->text now NULL */
1893         EDIT_UnlockBuffer(es, TRUE);
1894
1895         if (es->hloc32W) {
1896             UINT alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1897             if ((hNew32W = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT))) {
1898                 TRACE("Old 32 bit handle %p, new handle %p\n", es->hloc32W, hNew32W);
1899                 es->hloc32W = hNew32W;
1900                 es->buffer_size = LocalSize(hNew32W)/sizeof(WCHAR) - 1;
1901             }
1902         }
1903
1904         EDIT_LockBuffer(es);
1905
1906         if (es->buffer_size < size) {
1907                 WARN("FAILED !  We now have %d+1\n", es->buffer_size);
1908                 EDIT_NOTIFY_PARENT(es, EN_ERRSPACE);
1909                 return FALSE;
1910         } else {
1911                 TRACE("We now have %d+1\n", es->buffer_size);
1912                 return TRUE;
1913         }
1914 }
1915
1916
1917 /*********************************************************************
1918  *
1919  *      EDIT_MakeUndoFit
1920  *
1921  *      Try to fit size + 1 bytes in the undo buffer.
1922  *
1923  */
1924 static BOOL EDIT_MakeUndoFit(EDITSTATE *es, UINT size)
1925 {
1926         UINT alloc_size;
1927
1928         if (size <= es->undo_buffer_size)
1929                 return TRUE;
1930
1931         TRACE("trying to ReAlloc to %d+1\n", size);
1932
1933         alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1934         if ((es->undo_text = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, es->undo_text, alloc_size))) {
1935                 es->undo_buffer_size = alloc_size/sizeof(WCHAR) - 1;
1936                 return TRUE;
1937         }
1938         else
1939         {
1940                 WARN("FAILED !  We now have %d+1\n", es->undo_buffer_size);
1941                 return FALSE;
1942         }
1943 }
1944
1945
1946 /*********************************************************************
1947  *
1948  *      EDIT_MoveBackward
1949  *
1950  */
1951 static void EDIT_MoveBackward(EDITSTATE *es, BOOL extend)
1952 {
1953         INT e = es->selection_end;
1954
1955         if (e) {
1956                 e--;
1957                 if ((es->style & ES_MULTILINE) && e &&
1958                                 (es->text[e - 1] == '\r') && (es->text[e] == '\n')) {
1959                         e--;
1960                         if (e && (es->text[e - 1] == '\r'))
1961                                 e--;
1962                 }
1963         }
1964         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1965         EDIT_EM_ScrollCaret(es);
1966 }
1967
1968
1969 /*********************************************************************
1970  *
1971  *      EDIT_MoveDown_ML
1972  *
1973  *      Only for multi line controls
1974  *      Move the caret one line down, on a column with the nearest
1975  *      x coordinate on the screen (might be a different column).
1976  *
1977  */
1978 static void EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend)
1979 {
1980         INT s = es->selection_start;
1981         INT e = es->selection_end;
1982         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1983         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1984         INT x = (short)LOWORD(pos);
1985         INT y = (short)HIWORD(pos);
1986
1987         e = EDIT_CharFromPos(es, x, y + es->line_height, &after_wrap);
1988         if (!extend)
1989                 s = e;
1990         EDIT_EM_SetSel(es, s, e, after_wrap);
1991         EDIT_EM_ScrollCaret(es);
1992 }
1993
1994
1995 /*********************************************************************
1996  *
1997  *      EDIT_MoveEnd
1998  *
1999  */
2000 static void EDIT_MoveEnd(EDITSTATE *es, BOOL extend)
2001 {
2002         BOOL after_wrap = FALSE;
2003         INT e;
2004
2005         /* Pass a high value in x to make sure of receiving the end of the line */
2006         if (es->style & ES_MULTILINE)
2007                 e = EDIT_CharFromPos(es, 0x3fffffff,
2008                         HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), &after_wrap);
2009         else
2010                 e = get_text_length(es);
2011         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, after_wrap);
2012         EDIT_EM_ScrollCaret(es);
2013 }
2014
2015
2016 /*********************************************************************
2017  *
2018  *      EDIT_MoveForward
2019  *
2020  */
2021 static void EDIT_MoveForward(EDITSTATE *es, BOOL extend)
2022 {
2023         INT e = es->selection_end;
2024
2025         if (es->text[e]) {
2026                 e++;
2027                 if ((es->style & ES_MULTILINE) && (es->text[e - 1] == '\r')) {
2028                         if (es->text[e] == '\n')
2029                                 e++;
2030                         else if ((es->text[e] == '\r') && (es->text[e + 1] == '\n'))
2031                                 e += 2;
2032                 }
2033         }
2034         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
2035         EDIT_EM_ScrollCaret(es);
2036 }
2037
2038
2039 /*********************************************************************
2040  *
2041  *      EDIT_MoveHome
2042  *
2043  *      Home key: move to beginning of line.
2044  *
2045  */
2046 static void EDIT_MoveHome(EDITSTATE *es, BOOL extend)
2047 {
2048         INT e;
2049
2050         /* Pass the x_offset in x to make sure of receiving the first position of the line */
2051         if (es->style & ES_MULTILINE)
2052                 e = EDIT_CharFromPos(es, -es->x_offset,
2053                         HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), NULL);
2054         else
2055                 e = 0;
2056         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
2057         EDIT_EM_ScrollCaret(es);
2058 }
2059
2060
2061 /*********************************************************************
2062  *
2063  *      EDIT_MovePageDown_ML
2064  *
2065  *      Only for multi line controls
2066  *      Move the caret one page down, on a column with the nearest
2067  *      x coordinate on the screen (might be a different column).
2068  *
2069  */
2070 static void EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend)
2071 {
2072         INT s = es->selection_start;
2073         INT e = es->selection_end;
2074         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
2075         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
2076         INT x = (short)LOWORD(pos);
2077         INT y = (short)HIWORD(pos);
2078
2079         e = EDIT_CharFromPos(es, x,
2080                 y + (es->format_rect.bottom - es->format_rect.top),
2081                 &after_wrap);
2082         if (!extend)
2083                 s = e;
2084         EDIT_EM_SetSel(es, s, e, after_wrap);
2085         EDIT_EM_ScrollCaret(es);
2086 }
2087
2088
2089 /*********************************************************************
2090  *
2091  *      EDIT_MovePageUp_ML
2092  *
2093  *      Only for multi line controls
2094  *      Move the caret one page up, on a column with the nearest
2095  *      x coordinate on the screen (might be a different column).
2096  *
2097  */
2098 static void EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend)
2099 {
2100         INT s = es->selection_start;
2101         INT e = es->selection_end;
2102         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
2103         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
2104         INT x = (short)LOWORD(pos);
2105         INT y = (short)HIWORD(pos);
2106
2107         e = EDIT_CharFromPos(es, x,
2108                 y - (es->format_rect.bottom - es->format_rect.top),
2109                 &after_wrap);
2110         if (!extend)
2111                 s = e;
2112         EDIT_EM_SetSel(es, s, e, after_wrap);
2113         EDIT_EM_ScrollCaret(es);
2114 }
2115
2116
2117 /*********************************************************************
2118  *
2119  *      EDIT_MoveUp_ML
2120  *
2121  *      Only for multi line controls
2122  *      Move the caret one line up, on a column with the nearest
2123  *      x coordinate on the screen (might be a different column).
2124  *
2125  */
2126 static void EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend)
2127 {
2128         INT s = es->selection_start;
2129         INT e = es->selection_end;
2130         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
2131         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
2132         INT x = (short)LOWORD(pos);
2133         INT y = (short)HIWORD(pos);
2134
2135         e = EDIT_CharFromPos(es, x, y - es->line_height, &after_wrap);
2136         if (!extend)
2137                 s = e;
2138         EDIT_EM_SetSel(es, s, e, after_wrap);
2139         EDIT_EM_ScrollCaret(es);
2140 }
2141
2142
2143 /*********************************************************************
2144  *
2145  *      EDIT_MoveWordBackward
2146  *
2147  */
2148 static void EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend)
2149 {
2150         INT s = es->selection_start;
2151         INT e = es->selection_end;
2152         INT l;
2153         INT ll;
2154         INT li;
2155
2156         l = EDIT_EM_LineFromChar(es, e);
2157         ll = EDIT_EM_LineLength(es, e);
2158         li = EDIT_EM_LineIndex(es, l);
2159         if (e - li == 0) {
2160                 if (l) {
2161                         li = EDIT_EM_LineIndex(es, l - 1);
2162                         e = li + EDIT_EM_LineLength(es, li);
2163                 }
2164         } else {
2165                 e = li + (INT)EDIT_CallWordBreakProc(es,
2166                                 li, e - li, ll, WB_LEFT);
2167         }
2168         if (!extend)
2169                 s = e;
2170         EDIT_EM_SetSel(es, s, e, FALSE);
2171         EDIT_EM_ScrollCaret(es);
2172 }
2173
2174
2175 /*********************************************************************
2176  *
2177  *      EDIT_MoveWordForward
2178  *
2179  */
2180 static void EDIT_MoveWordForward(EDITSTATE *es, BOOL extend)
2181 {
2182         INT s = es->selection_start;
2183         INT e = es->selection_end;
2184         INT l;
2185         INT ll;
2186         INT li;
2187
2188         l = EDIT_EM_LineFromChar(es, e);
2189         ll = EDIT_EM_LineLength(es, e);
2190         li = EDIT_EM_LineIndex(es, l);
2191         if (e - li == ll) {
2192                 if ((es->style & ES_MULTILINE) && (l != es->line_count - 1))
2193                         e = EDIT_EM_LineIndex(es, l + 1);
2194         } else {
2195                 e = li + EDIT_CallWordBreakProc(es,
2196                                 li, e - li + 1, ll, WB_RIGHT);
2197         }
2198         if (!extend)
2199                 s = e;
2200         EDIT_EM_SetSel(es, s, e, FALSE);
2201         EDIT_EM_ScrollCaret(es);
2202 }
2203
2204
2205 /*********************************************************************
2206  *
2207  *      EDIT_PaintLine
2208  *
2209  */
2210 static void EDIT_PaintLine(EDITSTATE *es, HDC dc, INT line, BOOL rev)
2211 {
2212         INT s = es->selection_start;
2213         INT e = es->selection_end;
2214         INT li;
2215         INT ll;
2216         INT x;
2217         INT y;
2218         LRESULT pos;
2219
2220         if (es->style & ES_MULTILINE) {
2221                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2222                 if ((line < es->y_offset) || (line > es->y_offset + vlc) || (line >= es->line_count))
2223                         return;
2224         } else if (line)
2225                 return;
2226
2227         TRACE("line=%d\n", line);
2228
2229         pos = EDIT_EM_PosFromChar(es, EDIT_EM_LineIndex(es, line), FALSE);
2230         x = (short)LOWORD(pos);
2231         y = (short)HIWORD(pos);
2232         li = EDIT_EM_LineIndex(es, line);
2233         ll = EDIT_EM_LineLength(es, li);
2234         s = min(es->selection_start, es->selection_end);
2235         e = max(es->selection_start, es->selection_end);
2236         s = min(li + ll, max(li, s));
2237         e = min(li + ll, max(li, e));
2238         if (rev && (s != e) &&
2239                         ((es->flags & EF_FOCUSED) || (es->style & ES_NOHIDESEL))) {
2240                 x += EDIT_PaintText(es, dc, x, y, line, 0, s - li, FALSE);
2241                 x += EDIT_PaintText(es, dc, x, y, line, s - li, e - s, TRUE);
2242                 x += EDIT_PaintText(es, dc, x, y, line, e - li, li + ll - e, FALSE);
2243         } else
2244                 x += EDIT_PaintText(es, dc, x, y, line, 0, ll, FALSE);
2245 }
2246
2247
2248 /*********************************************************************
2249  *
2250  *      EDIT_PaintText
2251  *
2252  */
2253 static INT EDIT_PaintText(EDITSTATE *es, HDC dc, INT x, INT y, INT line, INT col, INT count, BOOL rev)
2254 {
2255         COLORREF BkColor;
2256         COLORREF TextColor;
2257         LOGFONTW underline_font;
2258         HFONT hUnderline = 0;
2259         HFONT old_font = 0;
2260         INT ret;
2261         INT li;
2262         INT BkMode;
2263         SIZE size;
2264
2265         if (!count)
2266                 return 0;
2267         BkMode = GetBkMode(dc);
2268         BkColor = GetBkColor(dc);
2269         TextColor = GetTextColor(dc);
2270         if (rev) {
2271                 if (es->composition_len == 0)
2272                 {
2273                         SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
2274                         SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
2275                         SetBkMode( dc, OPAQUE);
2276                 }
2277                 else
2278                 {
2279                         HFONT current = GetCurrentObject(dc,OBJ_FONT);
2280                         GetObjectW(current,sizeof(LOGFONTW),&underline_font);
2281                         underline_font.lfUnderline = TRUE;
2282                         hUnderline = CreateFontIndirectW(&underline_font);
2283                         old_font = SelectObject(dc,hUnderline);
2284                 }
2285         }
2286         li = EDIT_EM_LineIndex(es, line);
2287         if (es->style & ES_MULTILINE) {
2288                 ret = (INT)LOWORD(TabbedTextOutW(dc, x, y, es->text + li + col, count,
2289                                         es->tabs_count, es->tabs, es->format_rect.left - es->x_offset));
2290         } else {
2291                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2292                 TextOutW(dc, x, y, text + li + col, count);
2293                 GetTextExtentPoint32W(dc, text + li + col, count, &size);
2294                 ret = size.cx;
2295                 if (es->style & ES_PASSWORD)
2296                         HeapFree(GetProcessHeap(), 0, text);
2297         }
2298         if (rev) {
2299                 if (es->composition_len == 0)
2300                 {
2301                         SetBkColor(dc, BkColor);
2302                         SetTextColor(dc, TextColor);
2303                         SetBkMode( dc, BkMode);
2304                 }
2305                 else
2306                 {
2307                         if (old_font)
2308                                 SelectObject(dc,old_font);
2309                         if (hUnderline)
2310                                 DeleteObject(hUnderline);
2311                 }
2312         }
2313         return ret;
2314 }
2315
2316
2317 /*********************************************************************
2318  *
2319  *      EDIT_SetCaretPos
2320  *
2321  */
2322 static void EDIT_SetCaretPos(EDITSTATE *es, INT pos,
2323                              BOOL after_wrap)
2324 {
2325         LRESULT res = EDIT_EM_PosFromChar(es, pos, after_wrap);
2326         TRACE("%d - %dx%d\n", pos, (short)LOWORD(res), (short)HIWORD(res));
2327         SetCaretPos((short)LOWORD(res), (short)HIWORD(res));
2328 }
2329
2330
2331 /*********************************************************************
2332  *
2333  *      EDIT_AdjustFormatRect
2334  *
2335  *      Adjusts the format rectangle for the current font and the
2336  *      current client rectangle.
2337  *
2338  */
2339 static void EDIT_AdjustFormatRect(EDITSTATE *es)
2340 {
2341         RECT ClientRect;
2342
2343         es->format_rect.right = max(es->format_rect.right, es->format_rect.left + es->char_width);
2344         if (es->style & ES_MULTILINE)
2345         {
2346             INT fw, vlc, max_x_offset, max_y_offset;
2347
2348             vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2349             es->format_rect.bottom = es->format_rect.top + max(1, vlc) * es->line_height;
2350
2351             /* correct es->x_offset */
2352             fw = es->format_rect.right - es->format_rect.left;
2353             max_x_offset = es->text_width - fw;
2354             if(max_x_offset < 0) max_x_offset = 0;
2355             if(es->x_offset > max_x_offset)
2356                 es->x_offset = max_x_offset;
2357
2358             /* correct es->y_offset */
2359             max_y_offset = es->line_count - vlc;
2360             if(max_y_offset < 0) max_y_offset = 0;
2361             if(es->y_offset > max_y_offset)
2362                 es->y_offset = max_y_offset;
2363
2364             /* force scroll info update */
2365             EDIT_UpdateScrollInfo(es);
2366         }
2367         else
2368         /* Windows doesn't care to fix text placement for SL controls */
2369                 es->format_rect.bottom = es->format_rect.top + es->line_height;
2370
2371         /* Always stay within the client area */
2372         GetClientRect(es->hwndSelf, &ClientRect);
2373         es->format_rect.bottom = min(es->format_rect.bottom, ClientRect.bottom);
2374
2375         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL))
2376                 EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
2377
2378         EDIT_SetCaretPos(es, es->selection_end, es->flags & EF_AFTER_WRAP);
2379 }
2380
2381
2382 /*********************************************************************
2383  *
2384  *      EDIT_SetRectNP
2385  *
2386  *      note:   this is not (exactly) the handler called on EM_SETRECTNP
2387  *              it is also used to set the rect of a single line control
2388  *
2389  */
2390 static void EDIT_SetRectNP(EDITSTATE *es, LPRECT rc)
2391 {
2392         LONG_PTR ExStyle;
2393         INT bw, bh;
2394         ExStyle = GetWindowLongPtrW(es->hwndSelf, GWL_EXSTYLE);
2395
2396         CopyRect(&es->format_rect, rc);
2397
2398         if (ExStyle & WS_EX_CLIENTEDGE) {
2399                 es->format_rect.left++;
2400                 es->format_rect.right--;
2401
2402                 if (es->format_rect.bottom - es->format_rect.top
2403                     >= es->line_height + 2)
2404                 {
2405                         es->format_rect.top++;
2406                         es->format_rect.bottom--;
2407                 }
2408         }
2409         else if (es->style & WS_BORDER) {
2410                 bw = GetSystemMetrics(SM_CXBORDER) + 1;
2411                 bh = GetSystemMetrics(SM_CYBORDER) + 1;
2412                 es->format_rect.left += bw;
2413                 es->format_rect.right -= bw;
2414                 if (es->format_rect.bottom - es->format_rect.top
2415                   >= es->line_height + 2 * bh)
2416                 {
2417                     es->format_rect.top += bh;
2418                     es->format_rect.bottom -= bh;
2419                 }
2420         }
2421
2422         es->format_rect.left += es->left_margin;
2423         es->format_rect.right -= es->right_margin;
2424         EDIT_AdjustFormatRect(es);
2425 }
2426
2427
2428 /*********************************************************************
2429  *
2430  *      EDIT_UnlockBuffer
2431  *
2432  */
2433 static void EDIT_UnlockBuffer(EDITSTATE *es, BOOL force)
2434 {
2435
2436         /* Edit window might be already destroyed */
2437         if(!IsWindow(es->hwndSelf))
2438         {
2439             WARN("edit hwnd %p already destroyed\n", es->hwndSelf);
2440             return;
2441         }
2442
2443         if (!es->lock_count) {
2444                 ERR("lock_count == 0 ... please report\n");
2445                 return;
2446         }
2447         if (!es->text) {
2448                 ERR("es->text == 0 ... please report\n");
2449                 return;
2450         }
2451
2452         if (force || (es->lock_count == 1)) {
2453             if (es->hloc32W) {
2454                 CHAR *textA = NULL;
2455                 UINT countA = 0;
2456                 UINT countW = get_text_length(es) + 1;
2457                 STACK16FRAME* stack16 = NULL;
2458                 HANDLE16 oldDS = 0;
2459
2460                 if(es->hloc32A)
2461                 {
2462                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2463                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
2464                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2465                     countA = LocalSize(es->hloc32A);
2466                     if(countA_new > countA)
2467                     {
2468                         HLOCAL hloc32A_new;
2469                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2470                         TRACE("Resizing 32-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2471                         hloc32A_new = LocalReAlloc(es->hloc32A, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2472                         if(hloc32A_new)
2473                         {
2474                             es->hloc32A = hloc32A_new;
2475                             countA = LocalSize(hloc32A_new);
2476                             TRACE("Real new size %d bytes\n", countA);
2477                         }
2478                         else
2479                             WARN("FAILED! Will synchronize partially\n");
2480                     }
2481                     textA = LocalLock(es->hloc32A);
2482                 }
2483                 else if(es->hloc16)
2484                 {
2485                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2486
2487                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
2488                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2489
2490                     stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
2491                     oldDS = stack16->ds;
2492                     stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
2493
2494                     countA = LocalSize16(es->hloc16);
2495                     if(countA_new > countA)
2496                     {
2497                         HLOCAL16 hloc16_new;
2498                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2499                         TRACE("Resizing 16-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2500                         hloc16_new = LocalReAlloc16(es->hloc16, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2501                         if(hloc16_new)
2502                         {
2503                             es->hloc16 = hloc16_new;
2504                             countA = LocalSize16(hloc16_new);
2505                             TRACE("Real new size %d bytes\n", countA);
2506                         }
2507                         else
2508                             WARN("FAILED! Will synchronize partially\n");
2509                     }
2510                     textA = MapSL(LocalLock16(es->hloc16));
2511                 }
2512
2513                 if(textA)
2514                 {
2515                     WideCharToMultiByte(CP_ACP, 0, es->text, countW, textA, countA, NULL, NULL);
2516                     if(stack16)
2517                         LocalUnlock16(es->hloc16);
2518                     else
2519                         LocalUnlock(es->hloc32A);
2520                 }
2521
2522                 if (stack16) stack16->ds = oldDS;
2523                 LocalUnlock(es->hloc32W);
2524                 es->text = NULL;
2525             }
2526             else {
2527                 ERR("no buffer ... please report\n");
2528                 return;
2529             }
2530         }
2531         es->lock_count--;
2532 }
2533
2534
2535 /*********************************************************************
2536  *
2537  *      EDIT_UpdateScrollInfo
2538  *
2539  */
2540 static void EDIT_UpdateScrollInfo(EDITSTATE *es)
2541 {
2542     if ((es->style & WS_VSCROLL) && !(es->flags & EF_VSCROLL_TRACK))
2543     {
2544         SCROLLINFO si;
2545         si.cbSize       = sizeof(SCROLLINFO);
2546         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2547         si.nMin         = 0;
2548         si.nMax         = es->line_count - 1;
2549         si.nPage        = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2550         si.nPos         = es->y_offset;
2551         TRACE("SB_VERT, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2552                 si.nMin, si.nMax, si.nPage, si.nPos);
2553         SetScrollInfo(es->hwndSelf, SB_VERT, &si, TRUE);
2554     }
2555
2556     if ((es->style & WS_HSCROLL) && !(es->flags & EF_HSCROLL_TRACK))
2557     {
2558         SCROLLINFO si;
2559         si.cbSize       = sizeof(SCROLLINFO);
2560         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2561         si.nMin         = 0;
2562         si.nMax         = es->text_width - 1;
2563         si.nPage        = es->format_rect.right - es->format_rect.left;
2564         si.nPos         = es->x_offset;
2565         TRACE("SB_HORZ, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2566                 si.nMin, si.nMax, si.nPage, si.nPos);
2567         SetScrollInfo(es->hwndSelf, SB_HORZ, &si, TRUE);
2568     }
2569 }
2570
2571 /*********************************************************************
2572  *
2573  *      EDIT_WordBreakProc
2574  *
2575  *      Find the beginning of words.
2576  *      Note:   unlike the specs for a WordBreakProc, this function only
2577  *              allows to be called without linebreaks between s[0] up to
2578  *              s[count - 1].  Remember it is only called
2579  *              internally, so we can decide this for ourselves.
2580  *
2581  */
2582 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action)
2583 {
2584         INT ret = 0;
2585
2586         TRACE("s=%p, index=%d, count=%d, action=%d\n", s, index, count, action);
2587
2588         if(!s) return 0;
2589
2590         switch (action) {
2591         case WB_LEFT:
2592                 if (!count)
2593                         break;
2594                 if (index)
2595                         index--;
2596                 if (s[index] == ' ') {
2597                         while (index && (s[index] == ' '))
2598                                 index--;
2599                         if (index) {
2600                                 while (index && (s[index] != ' '))
2601                                         index--;
2602                                 if (s[index] == ' ')
2603                                         index++;
2604                         }
2605                 } else {
2606                         while (index && (s[index] != ' '))
2607                                 index--;
2608                         if (s[index] == ' ')
2609                                 index++;
2610                 }
2611                 ret = index;
2612                 break;
2613         case WB_RIGHT:
2614                 if (!count)
2615                         break;
2616                 if (index)
2617                         index--;
2618                 if (s[index] == ' ')
2619                         while ((index < count) && (s[index] == ' ')) index++;
2620                 else {
2621                         while (s[index] && (s[index] != ' ') && (index < count))
2622                                 index++;
2623                         while ((s[index] == ' ') && (index < count)) index++;
2624                 }
2625                 ret = index;
2626                 break;
2627         case WB_ISDELIMITER:
2628                 ret = (s[index] == ' ');
2629                 break;
2630         default:
2631                 ERR("unknown action code, please report !\n");
2632                 break;
2633         }
2634         return ret;
2635 }
2636
2637
2638 /*********************************************************************
2639  *
2640  *      EM_CHARFROMPOS
2641  *
2642  *      returns line number (not index) in high-order word of result.
2643  *      NB : Q137805 is unclear about this. POINT * pointer in lParam apply
2644  *      to Richedit, not to the edit control. Original documentation is valid.
2645  *      FIXME: do the specs mean to return -1 if outside client area or
2646  *              if outside formatting rectangle ???
2647  *
2648  */
2649 static LRESULT EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y)
2650 {
2651         POINT pt;
2652         RECT rc;
2653         INT index;
2654
2655         pt.x = x;
2656         pt.y = y;
2657         GetClientRect(es->hwndSelf, &rc);
2658         if (!PtInRect(&rc, pt))
2659                 return -1;
2660
2661         index = EDIT_CharFromPos(es, x, y, NULL);
2662         return MAKELONG(index, EDIT_EM_LineFromChar(es, index));
2663 }
2664
2665
2666 /*********************************************************************
2667  *
2668  *      EM_FMTLINES
2669  *
2670  * Enable or disable soft breaks.
2671  *
2672  * This means: insert or remove the soft linebreak character (\r\r\n).
2673  * Take care to check if the text still fits the buffer after insertion.
2674  * If not, notify with EN_ERRSPACE.
2675  *
2676  */
2677 static BOOL EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol)
2678 {
2679         es->flags &= ~EF_USE_SOFTBRK;
2680         if (add_eol) {
2681                 es->flags |= EF_USE_SOFTBRK;
2682                 FIXME("soft break enabled, not implemented\n");
2683         }
2684         return add_eol;
2685 }
2686
2687
2688 /*********************************************************************
2689  *
2690  *      EM_GETHANDLE
2691  *
2692  *      Hopefully this won't fire back at us.
2693  *      We always start with a fixed buffer in the local heap.
2694  *      Despite of the documentation says that the local heap is used
2695  *      only if DS_LOCALEDIT flag is set, NT and 2000 always allocate
2696  *      buffer on the local heap.
2697  *
2698  */
2699 static HLOCAL EDIT_EM_GetHandle(EDITSTATE *es)
2700 {
2701         HLOCAL hLocal;
2702
2703         if (!(es->style & ES_MULTILINE))
2704                 return 0;
2705
2706         if(es->is_unicode)
2707             hLocal = es->hloc32W;
2708         else
2709         {
2710             if(!es->hloc32A)
2711             {
2712                 CHAR *textA;
2713                 UINT countA, alloc_size;
2714                 TRACE("Allocating 32-bit ANSI alias buffer\n");
2715                 countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2716                 alloc_size = ROUND_TO_GROW(countA);
2717                 if(!(es->hloc32A = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
2718                 {
2719                     ERR("Could not allocate %d bytes for 32-bit ANSI alias buffer\n", alloc_size);
2720                     return 0;
2721                 }
2722                 textA = LocalLock(es->hloc32A);
2723                 WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2724                 LocalUnlock(es->hloc32A);
2725             }
2726             hLocal = es->hloc32A;
2727         }
2728
2729         es->flags |= EF_APP_HAS_HANDLE;
2730         TRACE("Returning %p, LocalSize() = %ld\n", hLocal, LocalSize(hLocal));
2731         return hLocal;
2732 }
2733
2734
2735 /*********************************************************************
2736  *
2737  *      EM_GETHANDLE16
2738  *
2739  *      Hopefully this won't fire back at us.
2740  *      We always start with a buffer in 32 bit linear memory.
2741  *      However, with this message a 16 bit application requests
2742  *      a handle of 16 bit local heap memory, where it expects to find
2743  *      the text.
2744  *      It's a pitty that from this moment on we have to use this
2745  *      local heap, because applications may rely on the handle
2746  *      in the future.
2747  *
2748  *      In this function we'll try to switch to local heap.
2749  */
2750 static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es)
2751 {
2752         CHAR *textA;
2753         UINT countA, alloc_size;
2754         STACK16FRAME* stack16;
2755         HANDLE16 oldDS;
2756
2757         if (!(es->style & ES_MULTILINE))
2758                 return 0;
2759
2760         if (es->hloc16)
2761                 return es->hloc16;
2762
2763         stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
2764         oldDS = stack16->ds;
2765         stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
2766
2767         if (!LocalHeapSize16()) {
2768
2769                 if (!LocalInit16(stack16->ds, 0, GlobalSize16(stack16->ds))) {
2770                         ERR("could not initialize local heap\n");
2771                         goto done;
2772                 }
2773                 TRACE("local heap initialized\n");
2774         }
2775
2776         countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2777         alloc_size = ROUND_TO_GROW(countA);
2778
2779         TRACE("Allocating 16-bit ANSI alias buffer\n");
2780         if (!(es->hloc16 = LocalAlloc16(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size))) {
2781                 ERR("could not allocate new 16 bit buffer\n");
2782                 goto done;
2783         }
2784
2785         if (!(textA = MapSL(LocalLock16( es->hloc16)))) {
2786                 ERR("could not lock new 16 bit buffer\n");
2787                 LocalFree16(es->hloc16);
2788                 es->hloc16 = 0;
2789                 goto done;
2790         }
2791
2792         WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2793         LocalUnlock16(es->hloc16);
2794         es->flags |= EF_APP_HAS_HANDLE;
2795
2796         TRACE("Returning %04X, LocalSize() = %d\n", es->hloc16, LocalSize16(es->hloc16));
2797
2798 done:
2799         stack16->ds = oldDS;
2800         return es->hloc16;
2801 }
2802
2803
2804 /*********************************************************************
2805  *
2806  *      EM_GETLINE
2807  *
2808  */
2809 static INT EDIT_EM_GetLine(EDITSTATE *es, INT line, LPWSTR dst, BOOL unicode)
2810 {
2811         LPWSTR src;
2812         INT line_len, dst_len;
2813         INT i;
2814
2815         if (es->style & ES_MULTILINE) {
2816                 if (line >= es->line_count)
2817                         return 0;
2818         } else
2819                 line = 0;
2820         i = EDIT_EM_LineIndex(es, line);
2821         src = es->text + i;
2822         line_len = EDIT_EM_LineLength(es, i);
2823         dst_len = *(WORD *)dst;
2824         if(unicode)
2825         {
2826             if(dst_len <= line_len)
2827             {
2828                 memcpy(dst, src, dst_len * sizeof(WCHAR));
2829                 return dst_len;
2830             }
2831             else /* Append 0 if enough space */
2832             {
2833                 memcpy(dst, src, line_len * sizeof(WCHAR));
2834                 dst[line_len] = 0;
2835                 return line_len;
2836             }
2837         }
2838         else
2839         {
2840             INT ret = WideCharToMultiByte(CP_ACP, 0, src, line_len, (LPSTR)dst, dst_len, NULL, NULL);
2841             if(!ret && line_len) /* Insufficient buffer size */
2842                 return dst_len;
2843             if(ret < dst_len) /* Append 0 if enough space */
2844                 ((LPSTR)dst)[ret] = 0;
2845             return ret;
2846         }
2847 }
2848
2849
2850 /*********************************************************************
2851  *
2852  *      EM_GETSEL
2853  *
2854  */
2855 static LRESULT EDIT_EM_GetSel(EDITSTATE *es, PUINT start, PUINT end)
2856 {
2857         UINT s = es->selection_start;
2858         UINT e = es->selection_end;
2859
2860         ORDER_UINT(s, e);
2861         if (start)
2862                 *start = s;
2863         if (end)
2864                 *end = e;
2865         return MAKELONG(s, e);
2866 }
2867
2868
2869 /*********************************************************************
2870  *
2871  *      EM_GETTHUMB
2872  *
2873  *      FIXME: is this right ?  (or should it be only VSCROLL)
2874  *      (and maybe only for edit controls that really have their
2875  *      own scrollbars) (and maybe only for multiline controls ?)
2876  *      All in all: very poorly documented
2877  *
2878  */
2879 static LRESULT EDIT_EM_GetThumb(EDITSTATE *es)
2880 {
2881         return MAKELONG(EDIT_WM_VScroll(es, EM_GETTHUMB16, 0),
2882                 EDIT_WM_HScroll(es, EM_GETTHUMB16, 0));
2883 }
2884
2885
2886 /*********************************************************************
2887  *
2888  *      EM_LINEFROMCHAR
2889  *
2890  */
2891 static INT EDIT_EM_LineFromChar(EDITSTATE *es, INT index)
2892 {
2893         INT line;
2894         LINEDEF *line_def;
2895
2896         if (!(es->style & ES_MULTILINE))
2897                 return 0;
2898         if (index > (INT)get_text_length(es))
2899                 return es->line_count - 1;
2900         if (index == -1)
2901                 index = min(es->selection_start, es->selection_end);
2902
2903         line = 0;
2904         line_def = es->first_line_def;
2905         index -= line_def->length;
2906         while ((index >= 0) && line_def->next) {
2907                 line++;
2908                 line_def = line_def->next;
2909                 index -= line_def->length;
2910         }
2911         return line;
2912 }
2913
2914
2915 /*********************************************************************
2916  *
2917  *      EM_LINEINDEX
2918  *
2919  */
2920 static INT EDIT_EM_LineIndex(EDITSTATE *es, INT line)
2921 {
2922         INT line_index;
2923         LINEDEF *line_def;
2924
2925         if (!(es->style & ES_MULTILINE))
2926                 return 0;
2927         if (line >= es->line_count)
2928                 return -1;
2929
2930         line_index = 0;
2931         line_def = es->first_line_def;
2932         if (line == -1) {
2933                 INT index = es->selection_end - line_def->length;
2934                 while ((index >= 0) && line_def->next) {
2935                         line_index += line_def->length;
2936                         line_def = line_def->next;
2937                         index -= line_def->length;
2938                 }
2939         } else {
2940                 while (line > 0) {
2941                         line_index += line_def->length;
2942                         line_def = line_def->next;
2943                         line--;
2944                 }
2945         }
2946         return line_index;
2947 }
2948
2949
2950 /*********************************************************************
2951  *
2952  *      EM_LINELENGTH
2953  *
2954  */
2955 static INT EDIT_EM_LineLength(EDITSTATE *es, INT index)
2956 {
2957         LINEDEF *line_def;
2958
2959         if (!(es->style & ES_MULTILINE))
2960                 return get_text_length(es);
2961
2962         if (index == -1) {
2963                 /* get the number of remaining non-selected chars of selected lines */
2964                 INT32 l; /* line number */
2965                 INT32 li; /* index of first char in line */
2966                 INT32 count;
2967                 l = EDIT_EM_LineFromChar(es, es->selection_start);
2968                 /* # chars before start of selection area */
2969                 count = es->selection_start - EDIT_EM_LineIndex(es, l);
2970                 l = EDIT_EM_LineFromChar(es, es->selection_end);
2971                 /* # chars after end of selection */
2972                 li = EDIT_EM_LineIndex(es, l);
2973                 count += li + EDIT_EM_LineLength(es, li) - es->selection_end;
2974                 return count;
2975         }
2976         line_def = es->first_line_def;
2977         index -= line_def->length;
2978         while ((index >= 0) && line_def->next) {
2979                 line_def = line_def->next;
2980                 index -= line_def->length;
2981         }
2982         return line_def->net_length;
2983 }
2984
2985
2986 /*********************************************************************
2987  *
2988  *      EM_LINESCROLL
2989  *
2990  *      NOTE: dx is in average character widths, dy - in lines;
2991  *
2992  */
2993 static BOOL EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy)
2994 {
2995         if (!(es->style & ES_MULTILINE))
2996                 return FALSE;
2997
2998         dx *= es->char_width;
2999         return EDIT_EM_LineScroll_internal(es, dx, dy);
3000 }
3001
3002 /*********************************************************************
3003  *
3004  *      EDIT_EM_LineScroll_internal
3005  *
3006  *      Version of EDIT_EM_LineScroll for internal use.
3007  *      It doesn't refuse if ES_MULTILINE is set and assumes that
3008  *      dx is in pixels, dy - in lines.
3009  *
3010  */
3011 static BOOL EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy)
3012 {
3013         INT nyoff;
3014         INT x_offset_in_pixels;
3015         INT lines_per_page = (es->format_rect.bottom - es->format_rect.top) /
3016                               es->line_height;
3017
3018         if (es->style & ES_MULTILINE)
3019         {
3020             x_offset_in_pixels = es->x_offset;
3021         }
3022         else
3023         {
3024             dy = 0;
3025             x_offset_in_pixels = (short)LOWORD(EDIT_EM_PosFromChar(es, es->x_offset, FALSE));
3026         }
3027
3028         if (-dx > x_offset_in_pixels)
3029                 dx = -x_offset_in_pixels;
3030         if (dx > es->text_width - x_offset_in_pixels)
3031                 dx = es->text_width - x_offset_in_pixels;
3032         nyoff = max(0, es->y_offset + dy);
3033         if (nyoff >= es->line_count - lines_per_page)
3034                 nyoff = max(0, es->line_count - lines_per_page);
3035         dy = (es->y_offset - nyoff) * es->line_height;
3036         if (dx || dy) {
3037                 RECT rc1;
3038                 RECT rc;
3039
3040                 es->y_offset = nyoff;
3041                 if(es->style & ES_MULTILINE)
3042                     es->x_offset += dx;
3043                 else
3044                     es->x_offset += dx / es->char_width;
3045
3046                 GetClientRect(es->hwndSelf, &rc1);
3047                 IntersectRect(&rc, &rc1, &es->format_rect);
3048                 ScrollWindowEx(es->hwndSelf, -dx, dy,
3049                                 NULL, &rc, NULL, NULL, SW_INVALIDATE);
3050                 /* force scroll info update */
3051                 EDIT_UpdateScrollInfo(es);
3052         }
3053         if (dx && !(es->flags & EF_HSCROLL_TRACK))
3054                 EDIT_NOTIFY_PARENT(es, EN_HSCROLL);
3055         if (dy && !(es->flags & EF_VSCROLL_TRACK))
3056                 EDIT_NOTIFY_PARENT(es, EN_VSCROLL);
3057         return TRUE;
3058 }
3059
3060
3061 /*********************************************************************
3062  *
3063  *      EM_POSFROMCHAR
3064  *
3065  */
3066 static LRESULT EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap)
3067 {
3068         INT len = get_text_length(es);
3069         INT l;
3070         INT li;
3071         INT x;
3072         INT y = 0;
3073         INT w;
3074         INT lw = 0;
3075         INT ll = 0;
3076         HDC dc;
3077         HFONT old_font = 0;
3078         SIZE size;
3079         LINEDEF *line_def;
3080
3081         index = min(index, len);
3082         dc = GetDC(es->hwndSelf);
3083         if (es->font)
3084                 old_font = SelectObject(dc, es->font);
3085         if (es->style & ES_MULTILINE) {
3086                 l = EDIT_EM_LineFromChar(es, index);
3087                 y = (l - es->y_offset) * es->line_height;
3088                 li = EDIT_EM_LineIndex(es, l);
3089                 if (after_wrap && (li == index) && l) {
3090                         INT l2 = l - 1;
3091                         line_def = es->first_line_def;
3092                         while (l2) {
3093                                 line_def = line_def->next;
3094                                 l2--;
3095                         }
3096                         if (line_def->ending == END_WRAP) {
3097                                 l--;
3098                                 y -= es->line_height;
3099                                 li = EDIT_EM_LineIndex(es, l);
3100                         }
3101                 }
3102
3103                 line_def = es->first_line_def;
3104                 while (line_def->index != li)
3105                         line_def = line_def->next;
3106
3107                 ll = line_def->net_length;
3108                 lw = line_def->width;
3109
3110                 w = es->format_rect.right - es->format_rect.left;
3111                 if (es->style & ES_RIGHT)
3112                 {
3113                         x = LOWORD(GetTabbedTextExtentW(dc, es->text + li + (index - li), ll - (index - li),
3114                                 es->tabs_count, es->tabs)) - es->x_offset;
3115                         x = w - x;
3116                 }
3117                 else if (es->style & ES_CENTER)
3118                 {
3119                         x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
3120                                 es->tabs_count, es->tabs)) - es->x_offset;
3121                         x += (w - lw) / 2;
3122                 }
3123                 else /* ES_LEFT */
3124                 {
3125                     x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
3126                                 es->tabs_count, es->tabs)) - es->x_offset;
3127                 }
3128         } else {
3129                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
3130                 if (index < es->x_offset) {
3131                         GetTextExtentPoint32W(dc, text + index,
3132                                         es->x_offset - index, &size);
3133                         x = -size.cx;
3134                 } else {
3135                         GetTextExtentPoint32W(dc, text + es->x_offset,
3136                                         index - es->x_offset, &size);
3137                          x = size.cx;
3138
3139                         if (!es->x_offset && (es->style & (ES_RIGHT | ES_CENTER)))
3140                         {
3141                                 w = es->format_rect.right - es->format_rect.left;
3142                                 if (w > es->text_width)
3143                                 {
3144                                         if (es->style & ES_RIGHT)
3145                                                 x += w - es->text_width;
3146                                         else if (es->style & ES_CENTER)
3147                                                 x += (w - es->text_width) / 2;
3148                                 }
3149                         }
3150                 }
3151                 y = 0;
3152                 if (es->style & ES_PASSWORD)
3153                         HeapFree(GetProcessHeap(), 0, text);
3154         }
3155         x += es->format_rect.left;
3156         y += es->format_rect.top;
3157         if (es->font)
3158                 SelectObject(dc, old_font);
3159         ReleaseDC(es->hwndSelf, dc);
3160         return MAKELONG((INT16)x, (INT16)y);
3161 }
3162
3163
3164 /*********************************************************************
3165  *
3166  *      EM_REPLACESEL
3167  *
3168  *      FIXME: handle ES_NUMBER and ES_OEMCONVERT here
3169  *
3170  */
3171 static void EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit)
3172 {
3173         UINT strl = strlenW(lpsz_replace);
3174         UINT tl = get_text_length(es);
3175         UINT utl;
3176         UINT s;
3177         UINT e;
3178         UINT i;
3179         UINT size;
3180         LPWSTR p;
3181         HRGN hrgn = 0;
3182         LPWSTR buf = NULL;
3183         UINT bufl = 0;
3184
3185         TRACE("%s, can_undo %d, send_update %d\n",
3186             debugstr_w(lpsz_replace), can_undo, send_update);
3187
3188         s = es->selection_start;
3189         e = es->selection_end;
3190
3191         if ((s == e) && !strl)
3192                 return;
3193
3194         ORDER_UINT(s, e);
3195
3196         size = tl - (e - s) + strl;
3197         if (!size)
3198                 es->text_width = 0;
3199
3200         /* Issue the EN_MAXTEXT notification and continue with replacing text
3201          * such that buffer limit is honored. */
3202         if ((honor_limit) && (es->buffer_limit > 0) && (size > es->buffer_limit)) {
3203                 EDIT_NOTIFY_PARENT(es, EN_MAXTEXT);
3204                 strl = es->buffer_limit - (tl - (e-s));
3205         }
3206
3207         if (!EDIT_MakeFit(es, tl - (e - s) + strl))
3208                 return;
3209
3210         if (e != s) {
3211                 /* there is something to be deleted */
3212                 TRACE("deleting stuff.\n");
3213                 bufl = e - s;
3214                 buf = HeapAlloc(GetProcessHeap(), 0, (bufl + 1) * sizeof(WCHAR));
3215                 if (!buf) return;
3216                 memcpy(buf, es->text + s, bufl * sizeof(WCHAR));
3217                 buf[bufl] = 0; /* ensure 0 termination */
3218                 /* now delete */
3219                 strcpyW(es->text + s, es->text + e);
3220                 text_buffer_changed(es);
3221         }
3222         if (strl) {
3223                 /* there is an insertion */
3224                 tl = get_text_length(es);
3225                 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));
3226                 for (p = es->text + tl ; p >= es->text + s ; p--)
3227                         p[strl] = p[0];
3228                 for (i = 0 , p = es->text + s ; i < strl ; i++)
3229                         p[i] = lpsz_replace[i];
3230                 if(es->style & ES_UPPERCASE)
3231                         CharUpperBuffW(p, strl);
3232                 else if(es->style & ES_LOWERCASE)
3233                         CharLowerBuffW(p, strl);
3234                 text_buffer_changed(es);
3235         }
3236         if (es->style & ES_MULTILINE)
3237         {
3238                 INT st = min(es->selection_start, es->selection_end);
3239                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3240
3241                 hrgn = CreateRectRgn(0, 0, 0, 0);
3242                 EDIT_BuildLineDefs_ML(es, st, st + strl,
3243                                 strl - abs(es->selection_end - es->selection_start), hrgn);
3244                 /* if text is too long undo all changes */
3245                 if (honor_limit && !(es->style & ES_AUTOVSCROLL) && (es->line_count > vlc)) {
3246                         if (strl)
3247                                 strcpyW(es->text + e, es->text + e + strl);
3248                         if (e != s)
3249                                 for (i = 0 , p = es->text ; i < e - s ; i++)
3250                                         p[i + s] = buf[i];
3251                         text_buffer_changed(es);
3252                         EDIT_BuildLineDefs_ML(es, s, e,
3253                                 abs(es->selection_end - es->selection_start) - strl, hrgn);
3254                         strl = 0;
3255                         e = s;
3256                         hrgn = CreateRectRgn(0, 0, 0, 0);
3257                         EDIT_NOTIFY_PARENT(es, EN_MAXTEXT);
3258                 }
3259         }
3260         else {
3261                 INT fw = es->format_rect.right - es->format_rect.left;
3262                 EDIT_CalcLineWidth_SL(es);
3263                 /* remove chars that don't fit */
3264                 if (honor_limit && !(es->style & ES_AUTOHSCROLL) && (es->text_width > fw)) {
3265                         while ((es->text_width > fw) && s + strl >= s) {
3266                                 strcpyW(es->text + s + strl - 1, es->text + s + strl);
3267                                 strl--;
3268                                 EDIT_CalcLineWidth_SL(es);
3269                         }
3270                         text_buffer_changed(es);
3271                         EDIT_NOTIFY_PARENT(es, EN_MAXTEXT);
3272                 }
3273         }
3274
3275         if (e != s) {
3276                 if (can_undo) {
3277                         utl = strlenW(es->undo_text);
3278                         if (!es->undo_insert_count && (*es->undo_text && (s == es->undo_position))) {
3279                                 /* undo-buffer is extended to the right */
3280                                 EDIT_MakeUndoFit(es, utl + e - s);
3281                                 memcpy(es->undo_text + utl, buf, (e - s)*sizeof(WCHAR));
3282                                 (es->undo_text + utl)[e - s] = 0; /* ensure 0 termination */
3283                         } else if (!es->undo_insert_count && (*es->undo_text && (e == es->undo_position))) {
3284                                 /* undo-buffer is extended to the left */
3285                                 EDIT_MakeUndoFit(es, utl + e - s);
3286                                 for (p = es->undo_text + utl ; p >= es->undo_text ; p--)
3287                                         p[e - s] = p[0];
3288                                 for (i = 0 , p = es->undo_text ; i < e - s ; i++)
3289                                         p[i] = buf[i];
3290                                 es->undo_position = s;
3291                         } else {
3292                                 /* new undo-buffer */
3293                                 EDIT_MakeUndoFit(es, e - s);
3294                                 memcpy(es->undo_text, buf, (e - s)*sizeof(WCHAR));
3295                                 es->undo_text[e - s] = 0; /* ensure 0 termination */
3296                                 es->undo_position = s;
3297                         }
3298                         /* any deletion makes the old insertion-undo invalid */
3299                         es->undo_insert_count = 0;
3300                 } else
3301                         EDIT_EM_EmptyUndoBuffer(es);
3302         }
3303         if (strl) {
3304                 if (can_undo) {
3305                         if ((s == es->undo_position) ||
3306                                 ((es->undo_insert_count) &&
3307                                 (s == es->undo_position + es->undo_insert_count)))
3308                                 /*
3309                                  * insertion is new and at delete position or
3310                                  * an extension to either left or right
3311                                  */
3312                                 es->undo_insert_count += strl;
3313                         else {
3314                                 /* new insertion undo */
3315                                 es->undo_position = s;
3316                                 es->undo_insert_count = strl;
3317                                 /* new insertion makes old delete-buffer invalid */
3318                                 *es->undo_text = '\0';
3319                         }
3320                 } else
3321                         EDIT_EM_EmptyUndoBuffer(es);
3322         }
3323
3324         if (bufl)
3325                 HeapFree(GetProcessHeap(), 0, buf);
3326
3327         s += strl;
3328
3329         /* If text has been deleted and we're right or center aligned then scroll rightward */
3330         if (es->style & (ES_RIGHT | ES_CENTER))
3331         {
3332                 INT delta = strl - abs(es->selection_end - es->selection_start);
3333
3334                 if (delta < 0 && es->x_offset)
3335                 {
3336                         if (abs(delta) > es->x_offset)
3337                                 es->x_offset = 0;
3338                         else
3339                                 es->x_offset += delta;
3340                 }
3341         }
3342
3343         EDIT_EM_SetSel(es, s, s, FALSE);
3344         es->flags |= EF_MODIFIED;
3345         if (send_update) es->flags |= EF_UPDATE;
3346         if (hrgn)
3347         {
3348                 EDIT_UpdateTextRegion(es, hrgn, TRUE);
3349                 DeleteObject(hrgn);
3350         }
3351         else
3352             EDIT_UpdateText(es, NULL, TRUE);
3353
3354         EDIT_EM_ScrollCaret(es);
3355
3356         /* force scroll info update */
3357         EDIT_UpdateScrollInfo(es);
3358
3359
3360         if(send_update || (es->flags & EF_UPDATE))
3361         {
3362             es->flags &= ~EF_UPDATE;
3363             EDIT_NOTIFY_PARENT(es, EN_CHANGE);
3364         }
3365 }
3366
3367
3368 /*********************************************************************
3369  *
3370  *      EM_SCROLL
3371  *
3372  */
3373 static LRESULT EDIT_EM_Scroll(EDITSTATE *es, INT action)
3374 {
3375         INT dy;
3376
3377         if (!(es->style & ES_MULTILINE))
3378                 return (LRESULT)FALSE;
3379
3380         dy = 0;
3381
3382         switch (action) {
3383         case SB_LINEUP:
3384                 if (es->y_offset)
3385                         dy = -1;
3386                 break;
3387         case SB_LINEDOWN:
3388                 if (es->y_offset < es->line_count - 1)
3389                         dy = 1;
3390                 break;
3391         case SB_PAGEUP:
3392                 if (es->y_offset)
3393                         dy = -(es->format_rect.bottom - es->format_rect.top) / es->line_height;
3394                 break;
3395         case SB_PAGEDOWN:
3396                 if (es->y_offset < es->line_count - 1)
3397                         dy = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3398                 break;
3399         default:
3400                 return (LRESULT)FALSE;
3401         }
3402         if (dy) {
3403             INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3404             /* check if we are going to move too far */
3405             if(es->y_offset + dy > es->line_count - vlc)
3406                 dy = es->line_count - vlc - es->y_offset;
3407
3408             /* Notification is done in EDIT_EM_LineScroll */
3409             if(dy)
3410                 EDIT_EM_LineScroll(es, 0, dy);
3411         }
3412         return MAKELONG((INT16)dy, (BOOL16)TRUE);
3413 }
3414
3415
3416 /*********************************************************************
3417  *
3418  *      EM_SCROLLCARET
3419  *
3420  */
3421 static void EDIT_EM_ScrollCaret(EDITSTATE *es)
3422 {
3423         if (es->style & ES_MULTILINE) {
3424                 INT l;
3425                 INT li;
3426                 INT vlc;
3427                 INT ww;
3428                 INT cw = es->char_width;
3429                 INT x;
3430                 INT dy = 0;
3431                 INT dx = 0;
3432
3433                 l = EDIT_EM_LineFromChar(es, es->selection_end);
3434                 li = EDIT_EM_LineIndex(es, l);
3435                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP));
3436                 vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3437                 if (l >= es->y_offset + vlc)
3438                         dy = l - vlc + 1 - es->y_offset;
3439                 if (l < es->y_offset)
3440                         dy = l - es->y_offset;
3441                 ww = es->format_rect.right - es->format_rect.left;
3442                 if (x < es->format_rect.left)
3443                         dx = x - es->format_rect.left - ww / HSCROLL_FRACTION / cw * cw;
3444                 if (x > es->format_rect.right)
3445                         dx = x - es->format_rect.left - (HSCROLL_FRACTION - 1) * ww / HSCROLL_FRACTION / cw * cw;
3446                 if (dy || dx || (es->y_offset && (es->line_count - es->y_offset < vlc)))
3447                 {
3448                     /* check if we are going to move too far */
3449                     if(es->x_offset + dx + ww > es->text_width)
3450                         dx = es->text_width - ww - es->x_offset;
3451                     if(dx || dy || (es->y_offset && (es->line_count - es->y_offset < vlc)))
3452                         EDIT_EM_LineScroll_internal(es, dx, dy);
3453                 }
3454         } else {
3455                 INT x;
3456                 INT goal;
3457                 INT format_width;
3458
3459                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3460                 format_width = es->format_rect.right - es->format_rect.left;
3461                 if (x < es->format_rect.left) {
3462                         goal = es->format_rect.left + format_width / HSCROLL_FRACTION;
3463                         do {
3464                                 es->x_offset--;
3465                                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3466                         } while ((x < goal) && es->x_offset);
3467                         /* FIXME: use ScrollWindow() somehow to improve performance */
3468                         EDIT_UpdateText(es, NULL, TRUE);
3469                 } else if (x > es->format_rect.right) {
3470                         INT x_last;
3471                         INT len = get_text_length(es);
3472                         goal = es->format_rect.right - format_width / HSCROLL_FRACTION;
3473                         do {
3474                                 es->x_offset++;
3475                                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3476                                 x_last = (short)LOWORD(EDIT_EM_PosFromChar(es, len, FALSE));
3477                         } while ((x > goal) && (x_last > es->format_rect.right));
3478                         /* FIXME: use ScrollWindow() somehow to improve performance */
3479                         EDIT_UpdateText(es, NULL, TRUE);
3480                 }
3481         }
3482
3483     if(es->flags & EF_FOCUSED)
3484         EDIT_SetCaretPos(es, es->selection_end, es->flags & EF_AFTER_WRAP);
3485 }
3486
3487
3488 /*********************************************************************
3489  *
3490  *      EM_SETHANDLE
3491  *
3492  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3493  *
3494  */
3495 static void EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc)
3496 {
3497         if (!(es->style & ES_MULTILINE))
3498                 return;
3499
3500         if (!hloc) {
3501                 WARN("called with NULL handle\n");
3502                 return;
3503         }
3504
3505         EDIT_UnlockBuffer(es, TRUE);
3506
3507         if(es->hloc16)
3508         {
3509             STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
3510             HANDLE16 oldDS = stack16->ds;
3511
3512             stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
3513             LocalFree16(es->hloc16);
3514             stack16->ds = oldDS;
3515             es->hloc16 = 0;
3516         }
3517
3518         if(es->is_unicode)
3519         {
3520             if(es->hloc32A)
3521             {
3522                 LocalFree(es->hloc32A);
3523                 es->hloc32A = NULL;
3524             }
3525             es->hloc32W = hloc;
3526         }
3527         else
3528         {
3529             INT countW, countA;
3530             HLOCAL hloc32W_new;
3531             WCHAR *textW;
3532             CHAR *textA;
3533
3534             countA = LocalSize(hloc);
3535             textA = LocalLock(hloc);
3536             countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3537             if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3538             {
3539                 ERR("Could not allocate new unicode buffer\n");
3540                 return;
3541             }
3542             textW = LocalLock(hloc32W_new);
3543             MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3544             LocalUnlock(hloc32W_new);
3545             LocalUnlock(hloc);
3546
3547             if(es->hloc32W)
3548                 LocalFree(es->hloc32W);
3549
3550             es->hloc32W = hloc32W_new;
3551             es->hloc32A = hloc;
3552         }
3553
3554         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3555
3556         es->flags |= EF_APP_HAS_HANDLE;
3557         EDIT_LockBuffer(es);
3558
3559         es->x_offset = es->y_offset = 0;
3560         es->selection_start = es->selection_end = 0;
3561         EDIT_EM_EmptyUndoBuffer(es);
3562         es->flags &= ~EF_MODIFIED;
3563         es->flags &= ~EF_UPDATE;
3564         EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
3565         EDIT_UpdateText(es, NULL, TRUE);
3566         EDIT_EM_ScrollCaret(es);
3567         /* force scroll info update */
3568         EDIT_UpdateScrollInfo(es);
3569 }
3570
3571
3572 /*********************************************************************
3573  *
3574  *      EM_SETHANDLE16
3575  *
3576  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3577  *
3578  */
3579 static void EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc)
3580 {
3581         STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
3582         HINSTANCE16 hInstance = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
3583         HANDLE16 oldDS = stack16->ds;
3584         INT countW, countA;
3585         HLOCAL hloc32W_new;
3586         WCHAR *textW;
3587         CHAR *textA;
3588
3589         if (!(es->style & ES_MULTILINE))
3590                 return;
3591
3592         if (!hloc) {
3593                 WARN("called with NULL handle\n");
3594                 return;
3595         }
3596
3597         EDIT_UnlockBuffer(es, TRUE);
3598
3599         if(es->hloc32A)
3600         {
3601             LocalFree(es->hloc32A);
3602             es->hloc32A = NULL;
3603         }
3604
3605         stack16->ds = hInstance;
3606         countA = LocalSize16(hloc);
3607         textA = MapSL(LocalLock16(hloc));
3608         countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3609         if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3610         {
3611             ERR("Could not allocate new unicode buffer\n");
3612             return;
3613         }
3614         textW = LocalLock(hloc32W_new);
3615         MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3616         LocalUnlock(hloc32W_new);
3617         LocalUnlock16(hloc);
3618         stack16->ds = oldDS;
3619
3620         if(es->hloc32W)
3621             LocalFree(es->hloc32W);
3622
3623         es->hloc32W = hloc32W_new;
3624         es->hloc16 = hloc;
3625
3626         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3627
3628         es->flags |= EF_APP_HAS_HANDLE;
3629         EDIT_LockBuffer(es);
3630
3631         es->x_offset = es->y_offset = 0;
3632         es->selection_start = es->selection_end = 0;
3633         EDIT_EM_EmptyUndoBuffer(es);
3634         es->flags &= ~EF_MODIFIED;
3635         es->flags &= ~EF_UPDATE;
3636         EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
3637         EDIT_UpdateText(es, NULL, TRUE);
3638         EDIT_EM_ScrollCaret(es);
3639         /* force scroll info update */
3640         EDIT_UpdateScrollInfo(es);
3641 }
3642
3643
3644 /*********************************************************************
3645  *
3646  *      EM_SETLIMITTEXT
3647  *
3648  *      FIXME: in WinNT maxsize is 0x7FFFFFFF / 0xFFFFFFFF
3649  *      However, the windows version is not complied to yet in all of edit.c
3650  *
3651  *  Additionally as the wrapper for RichEdit controls we need larger buffers
3652  *  at present -1 will represent nolimit
3653  */
3654 static void EDIT_EM_SetLimitText(EDITSTATE *es, INT limit)
3655 {
3656     if (limit == 0xFFFFFFFF)
3657         es->buffer_limit = -1;
3658     else if (es->style & ES_MULTILINE) {
3659                 if (limit)
3660                         es->buffer_limit = min(limit, BUFLIMIT_MULTI);
3661                 else
3662                         es->buffer_limit = BUFLIMIT_MULTI;
3663         } else {
3664                 if (limit)
3665                         es->buffer_limit = min(limit, BUFLIMIT_SINGLE);
3666                 else
3667                         es->buffer_limit = BUFLIMIT_SINGLE;
3668         }
3669 }
3670
3671
3672 /*********************************************************************
3673  *
3674  *      EM_SETMARGINS
3675  *
3676  * EC_USEFONTINFO is used as a left or right value i.e. lParam and not as an
3677  * action wParam despite what the docs say. EC_USEFONTINFO calculates the
3678  * margin according to the textmetrics of the current font.
3679  *
3680  * FIXME - With TrueType or vector fonts EC_USEFONTINFO currently sets one third
3681  * of the char's width as the margin, but this is not how Windows handles this.
3682  * For all other fonts Windows sets the margins to zero.
3683  *
3684  * FIXME - When EC_USEFONTINFO is used the margins only change if the
3685  * edit control is equal to or larger than a certain size.
3686  * Interestingly if one subtracts both the left and right margins from
3687  * this size one always seems to get an even number.  The extents of
3688  * the (four character) string "'**'" match this quite closely, so
3689  * we'll use this until we come up with a better idea.
3690  */
3691 static int calc_min_set_margin_size(HDC dc, INT left, INT right)
3692 {
3693     WCHAR magic_string[] = {'\'','*','*','\'', 0};
3694     SIZE sz;
3695
3696     GetTextExtentPointW(dc, magic_string, sizeof(magic_string)/sizeof(WCHAR) - 1, &sz);
3697     return sz.cx + left + right;
3698 }
3699
3700 static void EDIT_EM_SetMargins(EDITSTATE *es, INT action,
3701                                WORD left, WORD right, BOOL repaint)
3702 {
3703         TEXTMETRICW tm;
3704         INT default_left_margin  = 0; /* in pixels */
3705         INT default_right_margin = 0; /* in pixels */
3706
3707         /* Set the default margins depending on the font */
3708         if (es->font && (left == EC_USEFONTINFO || right == EC_USEFONTINFO)) {
3709             HDC dc = GetDC(es->hwndSelf);
3710             HFONT old_font = SelectObject(dc, es->font);
3711             GetTextMetricsW(dc, &tm);
3712             /* The default margins are only non zero for TrueType or Vector fonts */
3713             if (tm.tmPitchAndFamily & ( TMPF_VECTOR | TMPF_TRUETYPE )) {
3714                 int min_size;
3715                 RECT rc;
3716                 /* This must be calculated more exactly! But how? */
3717                 default_left_margin = tm.tmAveCharWidth / 2;
3718                 default_right_margin = tm.tmAveCharWidth / 2;
3719                 min_size = calc_min_set_margin_size(dc, default_left_margin, default_right_margin);
3720                 GetClientRect(es->hwndSelf, &rc);
3721                 if(rc.right - rc.left < min_size) {
3722                     default_left_margin = es->left_margin;
3723                     default_right_margin = es->right_margin;
3724                 }
3725             }
3726             SelectObject(dc, old_font);
3727             ReleaseDC(es->hwndSelf, dc);
3728         }
3729
3730         if (action & EC_LEFTMARGIN) {
3731                 es->format_rect.left -= es->left_margin;
3732                 if (left != EC_USEFONTINFO)
3733                         es->left_margin = left;
3734                 else
3735                         es->left_margin = default_left_margin;
3736                 es->format_rect.left += es->left_margin;
3737         }
3738
3739         if (action & EC_RIGHTMARGIN) {
3740                 es->format_rect.right += es->right_margin;
3741                 if (right != EC_USEFONTINFO)
3742                         es->right_margin = right;
3743                 else
3744                         es->right_margin = default_right_margin;
3745                 es->format_rect.right -= es->right_margin;
3746         }
3747
3748         if (action & (EC_LEFTMARGIN | EC_RIGHTMARGIN)) {
3749                 EDIT_AdjustFormatRect(es);
3750                 if (repaint) EDIT_UpdateText(es, NULL, TRUE);
3751         }
3752
3753         TRACE("left=%d, right=%d\n", es->left_margin, es->right_margin);
3754 }
3755
3756
3757 /*********************************************************************
3758  *
3759  *      EM_SETPASSWORDCHAR
3760  *
3761  */
3762 static void EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c)
3763 {
3764         LONG style;
3765
3766         if (es->style & ES_MULTILINE)
3767                 return;
3768
3769         if (es->password_char == c)
3770                 return;
3771
3772         style = GetWindowLongW( es->hwndSelf, GWL_STYLE );
3773         es->password_char = c;
3774         if (c) {
3775             SetWindowLongW( es->hwndSelf, GWL_STYLE, style | ES_PASSWORD );
3776             es->style |= ES_PASSWORD;
3777         } else {
3778             SetWindowLongW( es->hwndSelf, GWL_STYLE, style & ~ES_PASSWORD );
3779             es->style &= ~ES_PASSWORD;
3780         }
3781         EDIT_UpdateText(es, NULL, TRUE);
3782 }
3783
3784
3785 /*********************************************************************
3786  *
3787  *      EDIT_EM_SetSel
3788  *
3789  *      note:   unlike the specs say: the order of start and end
3790  *              _is_ preserved in Windows.  (i.e. start can be > end)
3791  *              In other words: this handler is OK
3792  *
3793  */
3794 static void EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap)
3795 {
3796         UINT old_start = es->selection_start;
3797         UINT old_end = es->selection_end;
3798         UINT len = get_text_length(es);
3799
3800         if (start == (UINT)-1) {
3801                 start = es->selection_end;
3802                 end = es->selection_end;
3803         } else {
3804                 start = min(start, len);
3805                 end = min(end, len);
3806         }
3807         es->selection_start = start;
3808         es->selection_end = end;
3809         if (after_wrap)
3810                 es->flags |= EF_AFTER_WRAP;
3811         else
3812                 es->flags &= ~EF_AFTER_WRAP;
3813         /* Compute the necessary invalidation region. */
3814         /* Note that we don't need to invalidate regions which have
3815          * "never" been selected, or those which are "still" selected.
3816          * In fact, every time we hit a selection boundary, we can
3817          * *toggle* whether we need to invalidate.  Thus we can optimize by
3818          * *sorting* the interval endpoints.  Let's assume that we sort them
3819          * in this order:
3820          *        start <= end <= old_start <= old_end
3821          * Knuth 5.3.1 (p 183) asssures us that this can be done optimally
3822          * in 5 comparisons; ie it's impossible to do better than the
3823          * following: */
3824         ORDER_UINT(end, old_end);
3825         ORDER_UINT(start, old_start);
3826         ORDER_UINT(old_start, old_end);
3827         ORDER_UINT(start, end);
3828         /* Note that at this point 'end' and 'old_start' are not in order, but
3829          * start is definitely the min. and old_end is definitely the max. */
3830         if (end != old_start)
3831         {
3832 /*
3833  * One can also do
3834  *          ORDER_UINT32(end, old_start);
3835  *          EDIT_InvalidateText(es, start, end);
3836  *          EDIT_InvalidateText(es, old_start, old_end);
3837  * in place of the following if statement.
3838  * (That would complete the optimal five-comparison four-element sort.)
3839  */
3840             if (old_start > end )
3841             {
3842                 EDIT_InvalidateText(es, start, end);
3843                 EDIT_InvalidateText(es, old_start, old_end);
3844             }
3845             else
3846             {
3847                 EDIT_InvalidateText(es, start, old_start);
3848                 EDIT_InvalidateText(es, end, old_end);
3849             }
3850         }
3851         else EDIT_InvalidateText(es, start, old_end);
3852 }
3853
3854
3855 /*********************************************************************
3856  *
3857  *      EM_SETTABSTOPS
3858  *
3859  */
3860 static BOOL EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs)
3861 {
3862         if (!(es->style & ES_MULTILINE))
3863                 return FALSE;
3864         HeapFree(GetProcessHeap(), 0, es->tabs);
3865         es->tabs_count = count;
3866         if (!count)
3867                 es->tabs = NULL;
3868         else {
3869                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3870                 memcpy(es->tabs, tabs, count * sizeof(INT));
3871         }
3872         return TRUE;
3873 }
3874
3875
3876 /*********************************************************************
3877  *
3878  *      EM_SETTABSTOPS16
3879  *
3880  */
3881 static BOOL EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs)
3882 {
3883         if (!(es->style & ES_MULTILINE))
3884                 return FALSE;
3885         HeapFree(GetProcessHeap(), 0, es->tabs);
3886         es->tabs_count = count;
3887         if (!count)
3888                 es->tabs = NULL;
3889         else {
3890                 INT i;
3891                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3892                 for (i = 0 ; i < count ; i++)
3893                         es->tabs[i] = *tabs++;
3894         }
3895         return TRUE;
3896 }
3897
3898
3899 /*********************************************************************
3900  *
3901  *      EM_SETWORDBREAKPROC
3902  *
3903  */
3904 static void EDIT_EM_SetWordBreakProc(EDITSTATE *es, void *wbp)
3905 {
3906         if (es->word_break_proc == wbp)
3907                 return;
3908
3909         es->word_break_proc = wbp;
3910         es->word_break_proc16 = NULL;
3911
3912         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3913                 EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
3914                 EDIT_UpdateText(es, NULL, TRUE);
3915         }
3916 }
3917
3918
3919 /*********************************************************************
3920  *
3921  *      EM_SETWORDBREAKPROC16
3922  *
3923  */
3924 static void EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp)
3925 {
3926         if (es->word_break_proc16 == wbp)
3927                 return;
3928
3929         es->word_break_proc = NULL;
3930         es->word_break_proc16 = wbp;
3931         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3932                 EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
3933                 EDIT_UpdateText(es, NULL, TRUE);
3934         }
3935 }
3936
3937
3938 /*********************************************************************
3939  *
3940  *      EM_UNDO / WM_UNDO
3941  *
3942  */
3943 static BOOL EDIT_EM_Undo(EDITSTATE *es)
3944 {
3945         INT ulength;
3946         LPWSTR utext;
3947
3948         /* As per MSDN spec, for a single-line edit control,
3949            the return value is always TRUE */
3950         if( es->style & ES_READONLY )
3951             return !(es->style & ES_MULTILINE);
3952
3953         ulength = strlenW(es->undo_text);
3954
3955         utext = HeapAlloc(GetProcessHeap(), 0, (ulength + 1) * sizeof(WCHAR));
3956
3957         strcpyW(utext, es->undo_text);
3958
3959         TRACE("before UNDO:insertion length = %d, deletion buffer = %s\n",
3960                      es->undo_insert_count, debugstr_w(utext));
3961
3962         EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3963         EDIT_EM_EmptyUndoBuffer(es);
3964         EDIT_EM_ReplaceSel(es, TRUE, utext, TRUE, TRUE);
3965         EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3966         /* send the notification after the selection start and end are set */
3967         EDIT_NOTIFY_PARENT(es, EN_CHANGE);
3968         EDIT_EM_ScrollCaret(es);
3969         HeapFree(GetProcessHeap(), 0, utext);
3970
3971         TRACE("after UNDO:insertion length = %d, deletion buffer = %s\n",
3972                         es->undo_insert_count, debugstr_w(es->undo_text));
3973         return TRUE;
3974 }
3975
3976
3977 /*********************************************************************
3978  *
3979  *      WM_CHAR
3980  *
3981  */
3982 static void EDIT_WM_Char(EDITSTATE *es, WCHAR c)
3983 {
3984         BOOL control;
3985
3986         control = GetKeyState(VK_CONTROL) & 0x8000;
3987
3988         switch (c) {
3989         case '\r':
3990             /* If the edit doesn't want the return and it's not a multiline edit, do nothing */
3991             if(!(es->style & ES_MULTILINE) && !(es->style & ES_WANTRETURN))
3992                 break;
3993         case '\n':
3994                 if (es->style & ES_MULTILINE) {
3995                         if (es->style & ES_READONLY) {
3996                                 EDIT_MoveHome(es, FALSE);
3997                                 EDIT_MoveDown_ML(es, FALSE);
3998                         } else {
3999                                 static const WCHAR cr_lfW[] = {'\r','\n',0};
4000                                 EDIT_EM_ReplaceSel(es, TRUE, cr_lfW, TRUE, TRUE);
4001                         }
4002                 }
4003                 break;
4004         case '\t':
4005                 if ((es->style & ES_MULTILINE) && !(es->style & ES_READONLY))
4006                 {
4007                         static const WCHAR tabW[] = {'\t',0};
4008                         EDIT_EM_ReplaceSel(es, TRUE, tabW, TRUE, TRUE);
4009                 }
4010                 break;
4011         case VK_BACK:
4012                 if (!(es->style & ES_READONLY) && !control) {
4013                         if (es->selection_start != es->selection_end)
4014                                 EDIT_WM_Clear(es);
4015                         else {
4016                                 /* delete character left of caret */
4017                                 EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4018                                 EDIT_MoveBackward(es, TRUE);
4019                                 EDIT_WM_Clear(es);
4020                         }
4021                 }
4022                 break;
4023         case 0x03: /* ^C */
4024                 if (!(es->style & ES_PASSWORD))
4025                     SendMessageW(es->hwndSelf, WM_COPY, 0, 0);
4026                 break;
4027         case 0x16: /* ^V */
4028                 if (!(es->style & ES_READONLY))
4029                     SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
4030                 break;
4031         case 0x18: /* ^X */
4032                 if (!((es->style & ES_READONLY) || (es->style & ES_PASSWORD)))
4033                     SendMessageW(es->hwndSelf, WM_CUT, 0, 0);
4034                 break;
4035
4036         default:
4037                 /*If Edit control style is ES_NUMBER allow users to key in only numeric values*/
4038                 if( (es->style & ES_NUMBER) && !( c >= '0' && c <= '9') )
4039                         break;
4040
4041                 if (!(es->style & ES_READONLY) && (c >= ' ') && (c != 127)) {
4042                         WCHAR str[2];
4043                         str[0] = c;
4044                         str[1] = '\0';
4045                         EDIT_EM_ReplaceSel(es, TRUE, str, TRUE, TRUE);
4046                 }
4047                 break;
4048         }
4049 }
4050
4051
4052 /*********************************************************************
4053  *
4054  *      WM_COMMAND
4055  *
4056  */
4057 static void EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND control)
4058 {
4059         if (code || control)
4060                 return;
4061
4062         switch (id) {
4063                 case EM_UNDO:
4064                         EDIT_EM_Undo(es);
4065                         break;
4066                 case WM_CUT:
4067                         EDIT_WM_Cut(es);
4068                         break;
4069                 case WM_COPY:
4070                         EDIT_WM_Copy(es);
4071                         break;
4072                 case WM_PASTE:
4073                         EDIT_WM_Paste(es);
4074                         break;
4075                 case WM_CLEAR:
4076                         EDIT_WM_Clear(es);
4077                         break;
4078                 case EM_SETSEL:
4079                         EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
4080                         EDIT_EM_ScrollCaret(es);
4081                         break;
4082                 default:
4083                         ERR("unknown menu item, please report\n");
4084                         break;
4085         }
4086 }
4087
4088
4089 /*********************************************************************
4090  *
4091  *      WM_CONTEXTMENU
4092  *
4093  *      Note: the resource files resource/sysres_??.rc cannot define a
4094  *              single popup menu.  Hence we use a (dummy) menubar
4095  *              containing the single popup menu as its first item.
4096  *
4097  *      FIXME: the message identifiers have been chosen arbitrarily,
4098  *              hence we use MF_BYPOSITION.
4099  *              We might as well use the "real" values (anybody knows ?)
4100  *              The menu definition is in resources/sysres_??.rc.
4101  *              Once these are OK, we better use MF_BYCOMMAND here
4102  *              (as we do in EDIT_WM_Command()).
4103  *
4104  */
4105 static void EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y)
4106 {
4107         HMENU menu = LoadMenuA(user32_module, "EDITMENU");
4108         HMENU popup = GetSubMenu(menu, 0);
4109         UINT start = es->selection_start;
4110         UINT end = es->selection_end;
4111
4112         ORDER_UINT(start, end);
4113
4114         /* undo */
4115         EnableMenuItem(popup, 0, MF_BYPOSITION | (EDIT_EM_CanUndo(es) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
4116         /* cut */
4117         EnableMenuItem(popup, 2, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
4118         /* copy */
4119         EnableMenuItem(popup, 3, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) ? MF_ENABLED : MF_GRAYED));
4120         /* paste */
4121         EnableMenuItem(popup, 4, MF_BYPOSITION | (IsClipboardFormatAvailable(CF_UNICODETEXT) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
4122         /* delete */
4123         EnableMenuItem(popup, 5, MF_BYPOSITION | ((end - start) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
4124         /* select all */
4125         EnableMenuItem(popup, 7, MF_BYPOSITION | (start || (end != get_text_length(es)) ? MF_ENABLED : MF_GRAYED));
4126
4127         if (x == -1 && y == -1) /* passed via VK_APPS press/release */
4128         {
4129             RECT rc;
4130             /* Windows places the menu at the edit's center in this case */
4131             GetClientRect(es->hwndSelf, &rc);
4132             MapWindowPoints(es->hwndSelf, 0, (POINT *)&rc, 2);
4133             x = rc.left + (rc.right - rc.left) / 2;
4134             y = rc.top + (rc.bottom - rc.top) / 2;
4135         }
4136
4137         TrackPopupMenu(popup, TPM_LEFTALIGN | TPM_RIGHTBUTTON, x, y, 0, es->hwndSelf, NULL);
4138         DestroyMenu(menu);
4139 }
4140
4141
4142 /*********************************************************************
4143  *
4144  *      WM_COPY
4145  *
4146  */
4147 static void EDIT_WM_Copy(EDITSTATE *es)
4148 {
4149         INT s = min(es->selection_start, es->selection_end);
4150         INT e = max(es->selection_start, es->selection_end);
4151         HGLOBAL hdst;
4152         LPWSTR dst;
4153         DWORD len;
4154
4155         if (e == s) return;
4156
4157         len = e - s;
4158         hdst = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, (len + 1) * sizeof(WCHAR));
4159         dst = GlobalLock(hdst);
4160         memcpy(dst, es->text + s, len * sizeof(WCHAR));
4161         dst[len] = 0; /* ensure 0 termination */
4162         TRACE("%s\n", debugstr_w(dst));
4163         GlobalUnlock(hdst);
4164         OpenClipboard(es->hwndSelf);
4165         EmptyClipboard();
4166         SetClipboardData(CF_UNICODETEXT, hdst);
4167         CloseClipboard();
4168 }
4169
4170
4171 /*********************************************************************
4172  *
4173  *      WM_CREATE
4174  *
4175  */
4176 static LRESULT EDIT_WM_Create(EDITSTATE *es, LPCWSTR name)
4177 {
4178         RECT clientRect;
4179
4180         TRACE("%s\n", debugstr_w(name));
4181        /*
4182         *       To initialize some final structure members, we call some helper
4183         *       functions.  However, since the EDITSTATE is not consistent (i.e.
4184         *       not fully initialized), we should be very careful which
4185         *       functions can be called, and in what order.
4186         */
4187         EDIT_WM_SetFont(es, 0, FALSE);
4188         EDIT_EM_EmptyUndoBuffer(es);
4189
4190         /* We need to calculate the format rect
4191            (applications may send EM_SETMARGINS before the control gets visible) */
4192         GetClientRect(es->hwndSelf, &clientRect);
4193         EDIT_SetRectNP(es, &clientRect);
4194
4195        if (name && *name) {
4196            EDIT_EM_ReplaceSel(es, FALSE, name, FALSE, FALSE);
4197            /* if we insert text to the editline, the text scrolls out
4198             * of the window, as the caret is placed after the insert
4199             * pos normally; thus we reset es->selection... to 0 and
4200             * update caret
4201             */
4202            es->selection_start = es->selection_end = 0;
4203            /* Adobe Photoshop does NOT like this. and MSDN says that EN_CHANGE
4204             * Messages are only to be sent when the USER does something to
4205             * change the contents. So I am removing this EN_CHANGE
4206             *
4207             * EDIT_NOTIFY_PARENT(es, EN_CHANGE);
4208             */
4209            EDIT_EM_ScrollCaret(es);
4210        }
4211        /* force scroll info update */
4212        EDIT_UpdateScrollInfo(es);
4213        /* The rule seems to return 1 here for success */
4214        /* Power Builder masked edit controls will crash  */
4215        /* if not. */
4216        /* FIXME: is that in all cases so ? */
4217        return 1;
4218 }
4219
4220
4221 /*********************************************************************
4222  *
4223  *      WM_DESTROY
4224  *
4225  */
4226 static LRESULT EDIT_WM_Destroy(EDITSTATE *es)
4227 {
4228         LINEDEF *pc, *pp;
4229
4230         if (es->hloc32W) {
4231                 while (LocalUnlock(es->hloc32W)) ;
4232                 LocalFree(es->hloc32W);
4233         }
4234         if (es->hloc32A) {
4235                 while (LocalUnlock(es->hloc32A)) ;
4236                 LocalFree(es->hloc32A);
4237         }
4238         if (es->hloc16) {
4239                 STACK16FRAME* stack16 = MapSL(PtrToUlong(NtCurrentTeb()->WOW32Reserved));
4240                 HANDLE16 oldDS = stack16->ds;
4241
4242                 stack16->ds = GetWindowLongPtrW( es->hwndSelf, GWLP_HINSTANCE );
4243                 while (LocalUnlock16(es->hloc16)) ;
4244                 LocalFree16(es->hloc16);
4245                 stack16->ds = oldDS;
4246         }
4247
4248         pc = es->first_line_def;
4249         while (pc)
4250         {
4251                 pp = pc->next;
4252                 HeapFree(GetProcessHeap(), 0, pc);
4253                 pc = pp;
4254         }
4255
4256         SetWindowLongPtrW( es->hwndSelf, 0, 0 );
4257         HeapFree(GetProcessHeap(), 0, es);
4258
4259         return 0;
4260 }
4261
4262
4263 /*********************************************************************
4264  *
4265  *      WM_ERASEBKGND
4266  *
4267  */
4268 static LRESULT EDIT_WM_EraseBkGnd(EDITSTATE *es, HDC dc)
4269 {
4270     /* we do the proper erase in EDIT_WM_Paint */
4271     return 1;
4272 }
4273
4274
4275 /*********************************************************************
4276  *
4277  *      WM_GETTEXT
4278  *
4279  */
4280 static INT EDIT_WM_GetText(EDITSTATE *es, INT count, LPWSTR dst, BOOL unicode)
4281 {
4282     if(!count) return 0;
4283
4284     if(unicode)
4285     {
4286         lstrcpynW(dst, es->text, count);
4287         return strlenW(dst);
4288     }
4289     else
4290     {
4291         LPSTR textA = (LPSTR)dst;
4292         if (!WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, count, NULL, NULL))
4293             textA[count - 1] = 0; /* ensure 0 termination */
4294         return strlen(textA);
4295     }
4296 }
4297
4298 /*********************************************************************
4299  *
4300  *      WM_HSCROLL
4301  *
4302  */
4303 static LRESULT EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos)
4304 {
4305         INT dx;
4306         INT fw;
4307
4308         if (!(es->style & ES_MULTILINE))
4309                 return 0;
4310
4311         if (!(es->style & ES_AUTOHSCROLL))
4312                 return 0;
4313
4314         dx = 0;
4315         fw = es->format_rect.right - es->format_rect.left;
4316         switch (action) {
4317         case SB_LINELEFT:
4318                 TRACE("SB_LINELEFT\n");
4319                 if (es->x_offset)
4320                         dx = -es->char_width;
4321                 break;
4322         case SB_LINERIGHT:
4323                 TRACE("SB_LINERIGHT\n");
4324                 if (es->x_offset < es->text_width)
4325                         dx = es->char_width;
4326                 break;
4327         case SB_PAGELEFT:
4328                 TRACE("SB_PAGELEFT\n");
4329                 if (es->x_offset)
4330                         dx = -fw / HSCROLL_FRACTION / es->char_width * es->char_width;
4331                 break;
4332         case SB_PAGERIGHT:
4333                 TRACE("SB_PAGERIGHT\n");
4334                 if (es->x_offset < es->text_width)
4335                         dx = fw / HSCROLL_FRACTION / es->char_width * es->char_width;
4336                 break;
4337         case SB_LEFT:
4338                 TRACE("SB_LEFT\n");
4339                 if (es->x_offset)
4340                         dx = -es->x_offset;
4341                 break;
4342         case SB_RIGHT:
4343                 TRACE("SB_RIGHT\n");
4344                 if (es->x_offset < es->text_width)
4345                         dx = es->text_width - es->x_offset;
4346                 break;
4347         case SB_THUMBTRACK:
4348                 TRACE("SB_THUMBTRACK %d\n", pos);
4349                 es->flags |= EF_HSCROLL_TRACK;
4350                 if(es->style & WS_HSCROLL)
4351                     dx = pos - es->x_offset;
4352                 else
4353                 {
4354                     INT fw, new_x;
4355                     /* Sanity check */
4356                     if(pos < 0 || pos > 100) return 0;
4357                     /* Assume default scroll range 0-100 */
4358                     fw = es->format_rect.right - es->format_rect.left;
4359                     new_x = pos * (es->text_width - fw) / 100;
4360                     dx = es->text_width ? (new_x - es->x_offset) : 0;
4361                 }
4362                 break;
4363         case SB_THUMBPOSITION:
4364                 TRACE("SB_THUMBPOSITION %d\n", pos);
4365                 es->flags &= ~EF_HSCROLL_TRACK;
4366                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
4367                     dx = pos - es->x_offset;
4368                 else
4369                 {
4370                     INT fw, new_x;
4371                     /* Sanity check */
4372                     if(pos < 0 || pos > 100) return 0;
4373                     /* Assume default scroll range 0-100 */
4374                     fw = es->format_rect.right - es->format_rect.left;
4375                     new_x = pos * (es->text_width - fw) / 100;
4376                     dx = es->text_width ? (new_x - es->x_offset) : 0;
4377                 }
4378                 if (!dx) {
4379                         /* force scroll info update */
4380                         EDIT_UpdateScrollInfo(es);
4381                         EDIT_NOTIFY_PARENT(es, EN_HSCROLL);
4382                 }
4383                 break;
4384         case SB_ENDSCROLL:
4385                 TRACE("SB_ENDSCROLL\n");
4386                 break;
4387         /*
4388          *      FIXME : the next two are undocumented !
4389          *      Are we doing the right thing ?
4390          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
4391          *      although it's also a regular control message.
4392          */
4393         case EM_GETTHUMB: /* this one is used by NT notepad */
4394         case EM_GETTHUMB16:
4395         {
4396                 LRESULT ret;
4397                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
4398                     ret = GetScrollPos(es->hwndSelf, SB_HORZ);
4399                 else
4400                 {
4401                     /* Assume default scroll range 0-100 */
4402                     INT fw = es->format_rect.right - es->format_rect.left;
4403                     ret = es->text_width ? es->x_offset * 100 / (es->text_width - fw) : 0;
4404                 }
4405                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
4406                 return ret;
4407         }
4408         case EM_LINESCROLL16:
4409                 TRACE("EM_LINESCROLL16\n");
4410                 dx = pos;
4411                 break;
4412
4413         default:
4414                 ERR("undocumented WM_HSCROLL action %d (0x%04x), please report\n",
4415                     action, action);
4416                 return 0;
4417         }
4418         if (dx)
4419         {
4420             INT fw = es->format_rect.right - es->format_rect.left;
4421             /* check if we are going to move too far */
4422             if(es->x_offset + dx + fw > es->text_width)
4423                 dx = es->text_width - fw - es->x_offset;
4424             if(dx)
4425                 EDIT_EM_LineScroll_internal(es, dx, 0);
4426         }
4427         return 0;
4428 }
4429
4430
4431 /*********************************************************************
4432  *
4433  *      EDIT_CheckCombo
4434  *
4435  */
4436 static BOOL EDIT_CheckCombo(EDITSTATE *es, UINT msg, INT key)
4437 {
4438    HWND hLBox = es->hwndListBox;
4439    HWND hCombo;
4440    BOOL bDropped;
4441    int  nEUI;
4442
4443    if (!hLBox)
4444       return FALSE;
4445
4446    hCombo   = GetParent(es->hwndSelf);
4447    bDropped = TRUE;
4448    nEUI     = 0;
4449
4450    TRACE_(combo)("[%p]: handling msg %x (%x)\n", es->hwndSelf, msg, key);
4451
4452    if (key == VK_UP || key == VK_DOWN)
4453    {
4454       if (SendMessageW(hCombo, CB_GETEXTENDEDUI, 0, 0))
4455          nEUI = 1;
4456
4457       if (msg == WM_KEYDOWN || nEUI)
4458           bDropped = (BOOL)SendMessageW(hCombo, CB_GETDROPPEDSTATE, 0, 0);
4459    }
4460
4461    switch (msg)
4462    {
4463       case WM_KEYDOWN:
4464          if (!bDropped && nEUI && (key == VK_UP || key == VK_DOWN))
4465          {
4466             /* make sure ComboLBox pops up */
4467             SendMessageW(hCombo, CB_SETEXTENDEDUI, FALSE, 0);
4468             key = VK_F4;
4469             nEUI = 2;
4470          }
4471
4472          SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)key, 0);
4473          break;
4474
4475       case WM_SYSKEYDOWN: /* Handle Alt+up/down arrows */
4476          if (nEUI)
4477             SendMessageW(hCombo, CB_SHOWDROPDOWN, bDropped ? FALSE : TRUE, 0);
4478          else
4479             SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)VK_F4, 0);
4480          break;
4481    }
4482
4483    if(nEUI == 2)
4484       SendMessageW(hCombo, CB_SETEXTENDEDUI, TRUE, 0);
4485
4486    return TRUE;
4487 }
4488
4489
4490 /*********************************************************************
4491  *
4492  *      WM_KEYDOWN
4493  *
4494  *      Handling of special keys that don't produce a WM_CHAR
4495  *      (i.e. non-printable keys) & Backspace & Delete
4496  *
4497  */
4498 static LRESULT EDIT_WM_KeyDown(EDITSTATE *es, INT key)
4499 {
4500         BOOL shift;
4501         BOOL control;
4502
4503         if (GetKeyState(VK_MENU) & 0x8000)
4504                 return 0;
4505
4506         shift = GetKeyState(VK_SHIFT) & 0x8000;
4507         control = GetKeyState(VK_CONTROL) & 0x8000;
4508
4509         switch (key) {
4510         case VK_F4:
4511         case VK_UP:
4512                 if (EDIT_CheckCombo(es, WM_KEYDOWN, key) || key == VK_F4)
4513                         break;
4514
4515                 /* fall through */
4516         case VK_LEFT:
4517                 if ((es->style & ES_MULTILINE) && (key == VK_UP))
4518                         EDIT_MoveUp_ML(es, shift);
4519                 else
4520                         if (control)
4521                                 EDIT_MoveWordBackward(es, shift);
4522                         else
4523                                 EDIT_MoveBackward(es, shift);
4524                 break;
4525         case VK_DOWN:
4526                 if (EDIT_CheckCombo(es, WM_KEYDOWN, key))
4527                         break;
4528                 /* fall through */
4529         case VK_RIGHT:
4530                 if ((es->style & ES_MULTILINE) && (key == VK_DOWN))
4531                         EDIT_MoveDown_ML(es, shift);
4532                 else if (control)
4533                         EDIT_MoveWordForward(es, shift);
4534                 else
4535                         EDIT_MoveForward(es, shift);
4536                 break;
4537         case VK_HOME:
4538                 EDIT_MoveHome(es, shift);
4539                 break;
4540         case VK_END:
4541                 EDIT_MoveEnd(es, shift);
4542                 break;
4543         case VK_PRIOR:
4544                 if (es->style & ES_MULTILINE)
4545                         EDIT_MovePageUp_ML(es, shift);
4546                 else
4547                         EDIT_CheckCombo(es, WM_KEYDOWN, key);
4548                 break;
4549         case VK_NEXT:
4550                 if (es->style & ES_MULTILINE)
4551                         EDIT_MovePageDown_ML(es, shift);
4552                 else
4553                         EDIT_CheckCombo(es, WM_KEYDOWN, key);
4554                 break;
4555         case VK_DELETE:
4556                 if (!(es->style & ES_READONLY) && !(shift && control)) {
4557                         if (es->selection_start != es->selection_end) {
4558                                 if (shift)
4559                                         EDIT_WM_Cut(es);
4560                                 else
4561                                         EDIT_WM_Clear(es);
4562                         } else {
4563                                 if (shift) {
4564                                         /* delete character left of caret */
4565                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4566                                         EDIT_MoveBackward(es, TRUE);
4567                                         EDIT_WM_Clear(es);
4568                                 } else if (control) {
4569                                         /* delete to end of line */
4570                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4571                                         EDIT_MoveEnd(es, TRUE);
4572                                         EDIT_WM_Clear(es);
4573                                 } else {
4574                                         /* delete character right of caret */
4575                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4576                                         EDIT_MoveForward(es, TRUE);
4577                                         EDIT_WM_Clear(es);
4578                                 }
4579                         }
4580                 }
4581                 break;
4582         case VK_INSERT:
4583                 if (shift) {
4584                         if (!(es->style & ES_READONLY))
4585                                 EDIT_WM_Paste(es);
4586                 } else if (control)
4587                         EDIT_WM_Copy(es);
4588                 break;
4589         case VK_RETURN:
4590             /* If the edit doesn't want the return send a message to the default object */
4591             if(!(es->style & ES_WANTRETURN))
4592             {
4593                 HWND hwndParent = GetParent(es->hwndSelf);
4594                 DWORD dw = SendMessageW( hwndParent, DM_GETDEFID, 0, 0 );
4595                 if (HIWORD(dw) == DC_HASDEFID)
4596                 {
4597                     SendMessageW( hwndParent, WM_COMMAND,
4598                                   MAKEWPARAM( LOWORD(dw), BN_CLICKED ),
4599                               (LPARAM)GetDlgItem( hwndParent, LOWORD(dw) ) );
4600                 }
4601             }
4602             break;
4603         }
4604         return 0;
4605 }
4606
4607
4608 /*********************************************************************
4609  *
4610  *      WM_KILLFOCUS
4611  *
4612  */
4613 static LRESULT EDIT_WM_KillFocus(EDITSTATE *es)
4614 {
4615         es->flags &= ~EF_FOCUSED;
4616         DestroyCaret();
4617         if(!(es->style & ES_NOHIDESEL))
4618                 EDIT_InvalidateText(es, es->selection_start, es->selection_end);
4619         EDIT_NOTIFY_PARENT(es, EN_KILLFOCUS);
4620         return 0;
4621 }
4622
4623
4624 /*********************************************************************
4625  *
4626  *      WM_LBUTTONDBLCLK
4627  *
4628  *      The caret position has been set on the WM_LBUTTONDOWN message
4629  *
4630  */
4631 static LRESULT EDIT_WM_LButtonDblClk(EDITSTATE *es)
4632 {
4633         INT s;
4634         INT e = es->selection_end;
4635         INT l;
4636         INT li;
4637         INT ll;
4638
4639         es->bCaptureState = TRUE;
4640         SetCapture(es->hwndSelf);
4641
4642         l = EDIT_EM_LineFromChar(es, e);
4643         li = EDIT_EM_LineIndex(es, l);
4644         ll = EDIT_EM_LineLength(es, e);
4645         s = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_LEFT);
4646         e = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_RIGHT);
4647         EDIT_EM_SetSel(es, s, e, FALSE);
4648         EDIT_EM_ScrollCaret(es);
4649         es->region_posx = es->region_posy = 0;
4650         SetTimer(es->hwndSelf, 0, 100, NULL);
4651         return 0;
4652 }
4653
4654
4655 /*********************************************************************
4656  *
4657  *      WM_LBUTTONDOWN
4658  *
4659  */
4660 static LRESULT EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y)
4661 {
4662         INT e;
4663         BOOL after_wrap;
4664
4665         es->bCaptureState = TRUE;
4666         SetCapture(es->hwndSelf);
4667         EDIT_ConfinePoint(es, &x, &y);
4668         e = EDIT_CharFromPos(es, x, y, &after_wrap);
4669         EDIT_EM_SetSel(es, (keys & MK_SHIFT) ? es->selection_start : e, e, after_wrap);
4670         EDIT_EM_ScrollCaret(es);
4671         es->region_posx = es->region_posy = 0;
4672         SetTimer(es->hwndSelf, 0, 100, NULL);
4673
4674         if (!(es->flags & EF_FOCUSED))
4675             SetFocus(es->hwndSelf);
4676
4677         return 0;
4678 }
4679
4680
4681 /*********************************************************************
4682  *
4683  *      WM_LBUTTONUP
4684  *
4685  */
4686 static LRESULT EDIT_WM_LButtonUp(EDITSTATE *es)
4687 {
4688         if (es->bCaptureState) {
4689                 KillTimer(es->hwndSelf, 0);
4690                 if (GetCapture() == es->hwndSelf) ReleaseCapture();
4691         }
4692         es->bCaptureState = FALSE;
4693         return 0;
4694 }
4695
4696
4697 /*********************************************************************
4698  *
4699  *      WM_MBUTTONDOWN
4700  *
4701  */
4702 static LRESULT EDIT_WM_MButtonDown(EDITSTATE *es)
4703 {
4704     SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
4705     return 0;
4706 }
4707
4708
4709 /*********************************************************************
4710  *
4711  *      WM_MOUSEMOVE
4712  *
4713  */
4714 static LRESULT EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y)
4715 {
4716         INT e;
4717         BOOL after_wrap;
4718         INT prex, prey;
4719
4720         /* If the mouse has been captured by process other than the edit control itself,
4721          * the windows edit controls will not select the strings with mouse move.
4722          */
4723         if (!es->bCaptureState || GetCapture() != es->hwndSelf)
4724                 return 0;
4725
4726         /*
4727          *      FIXME: gotta do some scrolling if outside client
4728          *              area.  Maybe reset the timer ?
4729          */
4730         prex = x; prey = y;
4731         EDIT_ConfinePoint(es, &x, &y);
4732         es->region_posx = (prex < x) ? -1 : ((prex > x) ? 1 : 0);
4733         es->region_posy = (prey < y) ? -1 : ((prey > y) ? 1 : 0);
4734         e = EDIT_CharFromPos(es, x, y, &after_wrap);
4735         EDIT_EM_SetSel(es, es->selection_start, e, after_wrap);
4736         EDIT_SetCaretPos(es,es->selection_end,es->flags & EF_AFTER_WRAP);
4737         return 0;
4738 }
4739
4740
4741 /*********************************************************************
4742  *
4743  *      WM_NCCREATE
4744  *
4745  * See also EDIT_WM_StyleChanged
4746  */
4747 static LRESULT EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode)
4748 {
4749         EDITSTATE *es;
4750         UINT alloc_size;
4751
4752         TRACE("Creating %s edit control, style = %08x\n",
4753                 unicode ? "Unicode" : "ANSI", lpcs->style);
4754
4755         if (!(es = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*es))))
4756                 return FALSE;
4757         SetWindowLongPtrW( hwnd, 0, (LONG_PTR)es );
4758
4759        /*
4760         *      Note: since the EDITSTATE has not been fully initialized yet,
4761         *            we can't use any API calls that may send
4762         *            WM_XXX messages before WM_NCCREATE is completed.
4763         */
4764
4765         es->is_unicode = unicode;
4766         es->style = lpcs->style;
4767
4768         es->bEnableState = !(es->style & WS_DISABLED);
4769
4770         es->hwndSelf = hwnd;
4771         /* Save parent, which will be notified by EN_* messages */
4772         es->hwndParent = lpcs->hwndParent;
4773
4774         if (es->style & ES_COMBO)
4775            es->hwndListBox = GetDlgItem(es->hwndParent, ID_CB_LISTBOX);
4776
4777         /* Number overrides lowercase overrides uppercase (at least it
4778          * does in Win95).  However I'll bet that ES_NUMBER would be
4779          * invalid under Win 3.1.
4780          */
4781         if (es->style & ES_NUMBER) {
4782                 ; /* do not override the ES_NUMBER */
4783         }  else if (es->style & ES_LOWERCASE) {
4784                 es->style &= ~ES_UPPERCASE;
4785         }
4786         if (es->style & ES_MULTILINE) {
4787                 es->buffer_limit = BUFLIMIT_MULTI;
4788                 if (es->style & WS_VSCROLL)
4789                         es->style |= ES_AUTOVSCROLL;
4790                 if (es->style & WS_HSCROLL)
4791                         es->style |= ES_AUTOHSCROLL;
4792                 es->style &= ~ES_PASSWORD;
4793                 if ((es->style & ES_CENTER) || (es->style & ES_RIGHT)) {
4794                         /* Confirmed - RIGHT overrides CENTER */
4795                         if (es->style & ES_RIGHT)
4796                                 es->style &= ~ES_CENTER;
4797                         es->style &= ~WS_HSCROLL;
4798                         es->style &= ~ES_AUTOHSCROLL;
4799                 }
4800         } else {
4801                 es->buffer_limit = BUFLIMIT_SINGLE;
4802                 if ((es->style & ES_RIGHT) && (es->style & ES_CENTER))
4803                         es->style &= ~ES_CENTER;
4804                 es->style &= ~WS_HSCROLL;
4805                 es->style &= ~WS_VSCROLL;
4806                 if (es->style & ES_PASSWORD)
4807                         es->password_char = '*';
4808         }
4809
4810         alloc_size = ROUND_TO_GROW((es->buffer_size + 1) * sizeof(WCHAR));
4811         if(!(es->hloc32W = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
4812             return FALSE;
4813         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
4814
4815         if (!(es->undo_text = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (es->buffer_size + 1) * sizeof(WCHAR))))
4816                 return FALSE;
4817         es->undo_buffer_size = es->buffer_size;
4818
4819         if (es->style & ES_MULTILINE)
4820                 if (!(es->first_line_def = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LINEDEF))))
4821                         return FALSE;
4822         es->line_count = 1;
4823
4824         /*
4825          * In Win95 look and feel, the WS_BORDER style is replaced by the
4826          * WS_EX_CLIENTEDGE style for the edit control. This gives the edit
4827          * control a nonclient area so we don't need to draw the border.
4828          * If WS_BORDER without WS_EX_CLIENTEDGE is specified we shouldn't have
4829          * a nonclient area and we should handle painting the border ourselves.
4830          *
4831          * When making modifications please ensure that the code still works
4832          * for edit controls created directly with style 0x50800000, exStyle 0
4833          * (which should have a single pixel border)
4834          */
4835         if (lpcs->dwExStyle & WS_EX_CLIENTEDGE)
4836                 es->style &= ~WS_BORDER;
4837         else if (es->style & WS_BORDER)
4838                 SetWindowLongW(hwnd, GWL_STYLE, es->style & ~WS_BORDER);
4839
4840         return TRUE;
4841 }
4842
4843 /*********************************************************************
4844  *
4845  *      WM_PAINT
4846  *
4847  */
4848 static void EDIT_WM_Paint(EDITSTATE *es, HDC hdc)
4849 {
4850         PAINTSTRUCT ps;
4851         INT i;
4852         HDC dc;
4853         HFONT old_font = 0;
4854         RECT rc;
4855         RECT rcClient;
4856         RECT rcLine;
4857         RECT rcRgn;
4858         HBRUSH brush;
4859         HBRUSH old_brush;
4860         INT bw, bh;
4861         BOOL rev = es->bEnableState &&
4862                                 ((es->flags & EF_FOCUSED) ||
4863                                         (es->style & ES_NOHIDESEL));
4864         dc = hdc ? hdc : BeginPaint(es->hwndSelf, &ps);
4865
4866         GetClientRect(es->hwndSelf, &rcClient);
4867
4868         /* get the background brush */
4869         brush = EDIT_NotifyCtlColor(es, dc);
4870
4871         /* paint the border and the background */
4872         IntersectClipRect(dc, rcClient.left, rcClient.top, rcClient.right, rcClient.bottom);
4873
4874         if(es->style & WS_BORDER) {
4875                 bw = GetSystemMetrics(SM_CXBORDER);
4876                 bh = GetSystemMetrics(SM_CYBORDER);
4877                 rc = rcClient;
4878                 if(es->style & ES_MULTILINE) {
4879                         if(es->style & WS_HSCROLL) rc.bottom+=bh;
4880                         if(es->style & WS_VSCROLL) rc.right+=bw;
4881                 }
4882
4883                 /* Draw the frame. Same code as in nonclient.c */
4884                 old_brush = SelectObject(dc, GetSysColorBrush(COLOR_WINDOWFRAME));
4885                 PatBlt(dc, rc.left, rc.top, rc.right - rc.left, bh, PATCOPY);
4886                 PatBlt(dc, rc.left, rc.top, bw, rc.bottom - rc.top, PATCOPY);
4887                 PatBlt(dc, rc.left, rc.bottom - 1, rc.right - rc.left, -bw, PATCOPY);
4888                 PatBlt(dc, rc.right - 1, rc.top, -bw, rc.bottom - rc.top, PATCOPY);
4889                 SelectObject(dc, old_brush);
4890
4891                 /* Keep the border clean */
4892                 IntersectClipRect(dc, rc.left+bw, rc.top+bh,
4893                     max(rc.right-bw, rc.left+bw), max(rc.bottom-bh, rc.top+bh));
4894         }
4895
4896         GetClipBox(dc, &rc);
4897         FillRect(dc, &rc, brush);
4898
4899         IntersectClipRect(dc, es->format_rect.left,
4900                                 es->format_rect.top,
4901                                 es->format_rect.right,
4902                                 es->format_rect.bottom);
4903         if (es->style & ES_MULTILINE) {
4904                 rc = rcClient;
4905                 IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
4906         }
4907         if (es->font)
4908                 old_font = SelectObject(dc, es->font);
4909
4910         if (!es->bEnableState)
4911                 SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT));
4912         GetClipBox(dc, &rcRgn);
4913         if (es->style & ES_MULTILINE) {
4914                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4915                 for (i = es->y_offset ; i <= min(es->y_offset + vlc, es->y_offset + es->line_count - 1) ; i++) {
4916                         EDIT_GetLineRect(es, i, 0, -1, &rcLine);
4917                         if (IntersectRect(&rc, &rcRgn, &rcLine))
4918                                 EDIT_PaintLine(es, dc, i, rev);
4919                 }
4920         } else {
4921                 EDIT_GetLineRect(es, 0, 0, -1, &rcLine);
4922                 if (IntersectRect(&rc, &rcRgn, &rcLine))
4923                         EDIT_PaintLine(es, dc, 0, rev);
4924         }
4925         if (es->font)
4926                 SelectObject(dc, old_font);
4927
4928         if (!hdc)
4929             EndPaint(es->hwndSelf, &ps);
4930 }
4931
4932
4933 /*********************************************************************
4934  *
4935  *      WM_PASTE
4936  *
4937  */
4938 static void EDIT_WM_Paste(EDITSTATE *es)
4939 {
4940         HGLOBAL hsrc;
4941         LPWSTR src;
4942
4943         /* Protect read-only edit control from modification */
4944         if(es->style & ES_READONLY)
4945             return;
4946
4947         OpenClipboard(es->hwndSelf);
4948         if ((hsrc = GetClipboardData(CF_UNICODETEXT))) {
4949                 src = (LPWSTR)GlobalLock(hsrc);
4950                 EDIT_EM_ReplaceSel(es, TRUE, src, TRUE, TRUE);
4951                 GlobalUnlock(hsrc);
4952         }
4953         else if (es->style & ES_PASSWORD) {
4954             /* clear selected text in password edit box even with empty clipboard */
4955             const WCHAR empty_strW[] = { 0 };
4956             EDIT_EM_ReplaceSel(es, TRUE, empty_strW, TRUE, TRUE);
4957         }
4958         CloseClipboard();
4959 }
4960
4961
4962 /*********************************************************************
4963  *
4964  *      WM_SETFOCUS
4965  *
4966  */
4967 static void EDIT_WM_SetFocus(EDITSTATE *es)
4968 {
4969         es->flags |= EF_FOCUSED;
4970
4971         if (!(es->style & ES_NOHIDESEL))
4972             EDIT_InvalidateText(es, es->selection_start, es->selection_end);
4973
4974         /* single line edit updates itself */
4975         if (!(es->style & ES_MULTILINE))
4976         {
4977             HDC hdc = GetDC(es->hwndSelf);
4978             EDIT_WM_Paint(es, hdc);
4979             ReleaseDC(es->hwndSelf, hdc);
4980         }
4981
4982         CreateCaret(es->hwndSelf, 0, 2, es->line_height);
4983         EDIT_SetCaretPos(es, es->selection_end,
4984                          es->flags & EF_AFTER_WRAP);
4985         ShowCaret(es->hwndSelf);
4986         EDIT_NOTIFY_PARENT(es, EN_SETFOCUS);
4987 }
4988
4989
4990 /*********************************************************************
4991  *
4992  *      WM_SETFONT
4993  *
4994  * With Win95 look the margins are set to default font value unless
4995  * the system font (font == 0) is being set, in which case they are left
4996  * unchanged.
4997  *
4998  */
4999 static void EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw)
5000 {
5001         TEXTMETRICW tm;
5002         HDC dc;
5003         HFONT old_font = 0;
5004         RECT clientRect;
5005
5006         es->font = font;
5007         dc = GetDC(es->hwndSelf);
5008         if (font)
5009                 old_font = SelectObject(dc, font);
5010         GetTextMetricsW(dc, &tm);
5011         es->line_height = tm.tmHeight;
5012         es->char_width = tm.tmAveCharWidth;
5013         if (font)
5014                 SelectObject(dc, old_font);
5015         ReleaseDC(es->hwndSelf, dc);
5016
5017         /* Reset the format rect and the margins */
5018         GetClientRect(es->hwndSelf, &clientRect);
5019         EDIT_SetRectNP(es, &clientRect);
5020         EDIT_EM_SetMargins(es, EC_LEFTMARGIN | EC_RIGHTMARGIN,
5021                            EC_USEFONTINFO, EC_USEFONTINFO, FALSE);
5022
5023         if (es->style & ES_MULTILINE)
5024                 EDIT_BuildLineDefs_ML(es, 0, get_text_length(es), 0, NULL);
5025         else
5026             EDIT_CalcLineWidth_SL(es);
5027
5028         if (redraw)
5029                 EDIT_UpdateText(es, NULL, TRUE);
5030         if (es->flags & EF_FOCUSED) {
5031                 DestroyCaret();
5032                 CreateCaret(es->hwndSelf, 0, 2, es->line_height);
5033                 EDIT_SetCaretPos(es, es->selection_end,
5034                                  es->flags & EF_AFTER_WRAP);
5035                 ShowCaret(es->hwndSelf);
5036         }
5037 }
5038
5039
5040 /*********************************************************************
5041  *
5042  *      WM_SETTEXT
5043  *
5044  * NOTES
5045  *  For multiline controls (ES_MULTILINE), reception of WM_SETTEXT triggers:
5046  *  The modified flag is reset. No notifications are sent.
5047  *
5048  *  For single-line controls, reception of WM_SETTEXT triggers:
5049  *  The modified flag is reset. EN_UPDATE and EN_CHANGE notifications are sent.
5050  *
5051  */
5052 static void EDIT_WM_SetText(EDITSTATE *es, LPCWSTR text, BOOL unicode)
5053 {
5054     LPWSTR textW = NULL;
5055     if (!unicode && text)
5056     {
5057         LPCSTR textA = (LPCSTR)text;
5058         INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
5059         textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR));
5060         if (textW)
5061             MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
5062         text = textW;
5063     }
5064
5065     if (es->flags & EF_UPDATE)
5066         /* fixed this bug once; complain if we see it about to happen again. */
5067         ERR("SetSel may generate UPDATE message whose handler may reset "
5068             "selection.\n");
5069
5070     EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
5071     if (text)
5072     {
5073         TRACE("%s\n", debugstr_w(text));
5074         EDIT_EM_ReplaceSel(es, FALSE, text, FALSE, FALSE);
5075         if(!unicode)
5076             HeapFree(GetProcessHeap(), 0, textW);
5077     }
5078     else
5079     {
5080         static const WCHAR empty_stringW[] = {0};
5081         TRACE("<NULL>\n");
5082         EDIT_EM_ReplaceSel(es, FALSE, empty_stringW, FALSE, FALSE);
5083     }
5084     es->x_offset = 0;
5085     es->flags &= ~EF_MODIFIED;
5086     EDIT_EM_SetSel(es, 0, 0, FALSE);
5087
5088     /* Send the notification after the selection start and end have been set
5089      * edit control doesn't send notification on WM_SETTEXT
5090      * if it is multiline, or it is part of combobox
5091      */
5092     if( !((es->style & ES_MULTILINE) || es->hwndListBox))
5093     {
5094         EDIT_NOTIFY_PARENT(es, EN_UPDATE);
5095         EDIT_NOTIFY_PARENT(es, EN_CHANGE);
5096     }
5097     EDIT_EM_ScrollCaret(es);
5098     EDIT_UpdateScrollInfo(es);
5099 }
5100
5101
5102 /*********************************************************************
5103  *
5104  *      WM_SIZE
5105  *
5106  */
5107 static void EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height)
5108 {
5109         if ((action == SIZE_MAXIMIZED) || (action == SIZE_RESTORED)) {
5110                 RECT rc;
5111                 TRACE("width = %d, height = %d\n", width, height);
5112                 SetRect(&rc, 0, 0, width, height);
5113                 EDIT_SetRectNP(es, &rc);
5114                 EDIT_UpdateText(es, NULL, TRUE);
5115         }
5116 }
5117
5118
5119 /*********************************************************************
5120  *
5121  *      WM_STYLECHANGED
5122  *
5123  * This message is sent by SetWindowLong on having changed either the Style
5124  * or the extended style.
5125  *
5126  * We ensure that the window's version of the styles and the EDITSTATE's agree.
5127  *
5128  * See also EDIT_WM_NCCreate
5129  *
5130  * It appears that the Windows version of the edit control allows the style
5131  * (as retrieved by GetWindowLong) to be any value and maintains an internal
5132  * style variable which will generally be different.  In this function we
5133  * update the internal style based on what changed in the externally visible
5134  * style.
5135  *
5136  * Much of this content as based upon the MSDN, especially:
5137  *  Platform SDK Documentation -> User Interface Services ->
5138  *      Windows User Interface -> Edit Controls -> Edit Control Reference ->
5139  *      Edit Control Styles
5140  */
5141 static LRESULT  EDIT_WM_StyleChanged ( EDITSTATE *es, WPARAM which, const STYLESTRUCT *style)
5142 {
5143         if (GWL_STYLE == which) {
5144                 DWORD style_change_mask;
5145                 DWORD new_style;
5146                 /* Only a subset of changes can be applied after the control
5147                  * has been created.
5148                  */
5149                 style_change_mask = ES_UPPERCASE | ES_LOWERCASE |
5150                                     ES_NUMBER;
5151                 if (es->style & ES_MULTILINE)
5152                         style_change_mask |= ES_WANTRETURN;
5153
5154                 new_style = style->styleNew & style_change_mask;
5155
5156                 /* Number overrides lowercase overrides uppercase (at least it
5157                  * does in Win95).  However I'll bet that ES_NUMBER would be
5158                  * invalid under Win 3.1.
5159                  */
5160                 if (new_style & ES_NUMBER) {
5161                         ; /* do not override the ES_NUMBER */
5162                 }  else if (new_style & ES_LOWERCASE) {
5163                         new_style &= ~ES_UPPERCASE;
5164                 }
5165
5166                 es->style = (es->style & ~style_change_mask) | new_style;
5167         } else if (GWL_EXSTYLE == which) {
5168                 ; /* FIXME - what is needed here */
5169         } else {
5170                 WARN ("Invalid style change %ld\n",which);
5171         }
5172
5173         return 0;
5174 }
5175
5176 /*********************************************************************
5177  *
5178  *      WM_SYSKEYDOWN
5179  *
5180  */
5181 static LRESULT EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data)
5182 {
5183         if ((key == VK_BACK) && (key_data & 0x2000)) {
5184                 if (EDIT_EM_CanUndo(es))
5185                         EDIT_EM_Undo(es);
5186                 return 0;
5187         } else if (key == VK_UP || key == VK_DOWN) {
5188                 if (EDIT_CheckCombo(es, WM_SYSKEYDOWN, key))
5189                         return 0;
5190         }
5191         return DefWindowProcW(es->hwndSelf, WM_SYSKEYDOWN, (WPARAM)key, (LPARAM)key_data);
5192 }
5193
5194
5195 /*********************************************************************
5196  *
5197  *      WM_TIMER
5198  *
5199  */
5200 static void EDIT_WM_Timer(EDITSTATE *es)
5201 {
5202         if (es->region_posx < 0) {
5203                 EDIT_MoveBackward(es, TRUE);
5204         } else if (es->region_posx > 0) {
5205                 EDIT_MoveForward(es, TRUE);
5206         }
5207 /*
5208  *      FIXME: gotta do some vertical scrolling here, like
5209  *              EDIT_EM_LineScroll(hwnd, 0, 1);
5210  */
5211 }
5212
5213 /*********************************************************************
5214  *
5215  *      WM_VSCROLL
5216  *
5217  */
5218 static LRESULT EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos)
5219 {
5220         INT dy;
5221
5222         if (!(es->style & ES_MULTILINE))
5223                 return 0;
5224
5225         if (!(es->style & ES_AUTOVSCROLL))
5226                 return 0;
5227
5228         dy = 0;
5229         switch (action) {
5230         case SB_LINEUP:
5231         case SB_LINEDOWN:
5232         case SB_PAGEUP:
5233         case SB_PAGEDOWN:
5234                 TRACE("action %d (%s)\n", action, (action == SB_LINEUP ? "SB_LINEUP" :
5235                                                    (action == SB_LINEDOWN ? "SB_LINEDOWN" :
5236                                                     (action == SB_PAGEUP ? "SB_PAGEUP" :
5237                                                      "SB_PAGEDOWN"))));
5238                 EDIT_EM_Scroll(es, action);
5239                 return 0;
5240         case SB_TOP:
5241                 TRACE("SB_TOP\n");
5242                 dy = -es->y_offset;
5243                 break;
5244         case SB_BOTTOM:
5245                 TRACE("SB_BOTTOM\n");
5246                 dy = es->line_count - 1 - es->y_offset;
5247                 break;
5248         case SB_THUMBTRACK:
5249                 TRACE("SB_THUMBTRACK %d\n", pos);
5250                 es->flags |= EF_VSCROLL_TRACK;
5251                 if(es->style & WS_VSCROLL)
5252                     dy = pos - es->y_offset;
5253                 else
5254                 {
5255                     /* Assume default scroll range 0-100 */
5256                     INT vlc, new_y;
5257                     /* Sanity check */
5258                     if(pos < 0 || pos > 100) return 0;
5259                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
5260                     new_y = pos * (es->line_count - vlc) / 100;
5261                     dy = es->line_count ? (new_y - es->y_offset) : 0;
5262                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
5263                             es->line_count, es->y_offset, pos, dy);
5264                 }
5265                 break;
5266         case SB_THUMBPOSITION:
5267                 TRACE("SB_THUMBPOSITION %d\n", pos);
5268                 es->flags &= ~EF_VSCROLL_TRACK;
5269                 if(es->style & WS_VSCROLL)
5270                     dy = pos - es->y_offset;
5271                 else
5272                 {
5273                     /* Assume default scroll range 0-100 */
5274                     INT vlc, new_y;
5275                     /* Sanity check */
5276                     if(pos < 0 || pos > 100) return 0;
5277                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
5278                     new_y = pos * (es->line_count - vlc) / 100;
5279                     dy = es->line_count ? (new_y - es->y_offset) : 0;
5280                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
5281                             es->line_count, es->y_offset, pos, dy);
5282                 }
5283                 if (!dy)
5284                 {
5285                         /* force scroll info update */
5286                         EDIT_UpdateScrollInfo(es);
5287                         EDIT_NOTIFY_PARENT(es, EN_VSCROLL);
5288                 }
5289                 break;
5290         case SB_ENDSCROLL:
5291                 TRACE("SB_ENDSCROLL\n");
5292                 break;
5293         /*
5294          *      FIXME : the next two are undocumented !
5295          *      Are we doing the right thing ?
5296          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
5297          *      although it's also a regular control message.
5298          */
5299         case EM_GETTHUMB: /* this one is used by NT notepad */
5300         case EM_GETTHUMB16:
5301         {
5302                 LRESULT ret;
5303                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_VSCROLL)
5304                     ret = GetScrollPos(es->hwndSelf, SB_VERT);
5305                 else
5306                 {
5307                     /* Assume default scroll range 0-100 */
5308                     INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
5309                     ret = es->line_count ? es->y_offset * 100 / (es->line_count - vlc) : 0;
5310                 }
5311                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
5312                 return ret;
5313         }
5314         case EM_LINESCROLL16:
5315                 TRACE("EM_LINESCROLL16 %d\n", pos);
5316                 dy = pos;
5317                 break;
5318
5319         default:
5320                 ERR("undocumented WM_VSCROLL action %d (0x%04x), please report\n",
5321                     action, action);
5322                 return 0;
5323         }
5324         if (dy)
5325                 EDIT_EM_LineScroll(es, 0, dy);
5326         return 0;
5327 }
5328
5329 /*********************************************************************
5330  *
5331  *      EDIT_UpdateText
5332  *
5333  */
5334 static void EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase)
5335 {
5336     if (es->flags & EF_UPDATE) {
5337         es->flags &= ~EF_UPDATE;
5338         EDIT_NOTIFY_PARENT(es, EN_UPDATE);
5339     }
5340     InvalidateRgn(es->hwndSelf, hrgn, bErase);
5341 }
5342
5343
5344 /*********************************************************************
5345  *
5346  *      EDIT_UpdateText
5347  *
5348  */
5349 static void EDIT_UpdateText(EDITSTATE *es, LPRECT rc, BOOL bErase)
5350 {
5351     if (es->flags & EF_UPDATE) {
5352         es->flags &= ~EF_UPDATE;
5353         EDIT_NOTIFY_PARENT(es, EN_UPDATE);
5354     }
5355     InvalidateRect(es->hwndSelf, rc, bErase);
5356 }
5357
5358 /********************************************************************
5359  *
5360  * The Following code is to handle inline editing from IMEs
5361  */
5362
5363 static void EDIT_GetCompositionStr(HWND hwnd, LPARAM CompFlag, EDITSTATE *es)
5364 {
5365     DWORD dwBufLen;
5366     LPWSTR lpCompStr = NULL;
5367     HIMC hIMC;
5368     LPSTR lpCompStrAttr = NULL;
5369     DWORD dwBufLenAttr;
5370
5371     if (!(hIMC = ImmGetContext(hwnd)))
5372         return;
5373
5374     dwBufLen = ImmGetCompositionStringW(hIMC, GCS_COMPSTR, NULL, 0);
5375
5376     if (dwBufLen < 0)
5377     {
5378         ImmReleaseContext(hwnd, hIMC);
5379         return;
5380     }
5381
5382     lpCompStr = HeapAlloc(GetProcessHeap(),0,dwBufLen + sizeof(WCHAR));
5383     if (!lpCompStr)
5384     {
5385         ERR("Unable to allocate IME CompositionString\n");
5386         ImmReleaseContext(hwnd,hIMC);
5387         return;
5388     }
5389
5390     if (dwBufLen)
5391         ImmGetCompositionStringW(hIMC, GCS_COMPSTR, lpCompStr, dwBufLen);
5392     lpCompStr[dwBufLen/sizeof(WCHAR)] = 0;
5393
5394     if (CompFlag & GCS_COMPATTR)
5395     {
5396         /*
5397          * We do not use the attributes yet. it would tell us what characters
5398          * are in transition and which are converted or decided upon
5399          */
5400         dwBufLenAttr = ImmGetCompositionStringW(hIMC, GCS_COMPATTR, NULL, 0);
5401         if (dwBufLenAttr)
5402         {
5403             dwBufLenAttr ++;
5404             lpCompStrAttr = HeapAlloc(GetProcessHeap(),0,dwBufLenAttr+1);
5405             if (!lpCompStrAttr)
5406             {
5407                 ERR("Unable to allocate IME Attribute String\n");
5408                 HeapFree(GetProcessHeap(),0,lpCompStr);
5409                 ImmReleaseContext(hwnd,hIMC);
5410                 return;
5411             }
5412             ImmGetCompositionStringW(hIMC,GCS_COMPATTR, lpCompStrAttr,
5413                     dwBufLenAttr);
5414             lpCompStrAttr[dwBufLenAttr] = 0;
5415         }
5416         else
5417             lpCompStrAttr = NULL;
5418     }
5419
5420     /* check for change in composition start */
5421     if (es->selection_end < es->composition_start)
5422         es->composition_start = es->selection_end;
5423
5424     /* replace existing selection string */
5425     es->selection_start = es->composition_start;
5426
5427     if (es->composition_len > 0)
5428         es->selection_end = es->composition_start + es->composition_len;
5429     else
5430         es->selection_end = es->selection_start;
5431
5432     EDIT_EM_ReplaceSel(es, FALSE, lpCompStr, TRUE, TRUE);
5433     es->composition_len = abs(es->composition_start - es->selection_end);
5434
5435     es->selection_start = es->composition_start;
5436     es->selection_end = es->selection_start + es->composition_len;
5437
5438     HeapFree(GetProcessHeap(),0,lpCompStrAttr);
5439     HeapFree(GetProcessHeap(),0,lpCompStr);
5440     ImmReleaseContext(hwnd,hIMC);
5441 }
5442
5443 static void EDIT_GetResultStr(HWND hwnd, EDITSTATE *es)
5444 {
5445     DWORD dwBufLen;
5446     LPWSTR lpResultStr;
5447     HIMC    hIMC;
5448
5449     if ( !(hIMC = ImmGetContext(hwnd)))
5450         return;
5451
5452     dwBufLen = ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, NULL, 0);
5453     if (dwBufLen <= 0)
5454     {
5455         ImmReleaseContext(hwnd, hIMC);
5456         return;
5457     }
5458
5459     lpResultStr = HeapAlloc(GetProcessHeap(),0, dwBufLen+sizeof(WCHAR));
5460     if (!lpResultStr)
5461     {
5462         ERR("Unable to alloc buffer for IME string\n");
5463         ImmReleaseContext(hwnd, hIMC);
5464         return;
5465     }
5466
5467     ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, lpResultStr, dwBufLen);
5468     lpResultStr[dwBufLen/sizeof(WCHAR)] = 0;
5469
5470     /* check for change in composition start */
5471     if (es->selection_end < es->composition_start)
5472         es->composition_start = es->selection_end;
5473
5474     es->selection_start = es->composition_start;
5475     es->selection_end = es->composition_start + es->composition_len;
5476     EDIT_EM_ReplaceSel(es, TRUE, lpResultStr, TRUE, TRUE);
5477     es->composition_start = es->selection_end;
5478     es->composition_len = 0;
5479
5480     HeapFree(GetProcessHeap(),0,lpResultStr);
5481     ImmReleaseContext(hwnd, hIMC);
5482 }
5483
5484 static void EDIT_ImeComposition(HWND hwnd, LPARAM CompFlag, EDITSTATE *es)
5485 {
5486     if (CompFlag & GCS_RESULTSTR)
5487         EDIT_GetResultStr(hwnd,es);
5488     if (CompFlag & GCS_COMPSTR)
5489         EDIT_GetCompositionStr(hwnd, CompFlag, es);
5490 }