git.oblomov.eu Git - wine/blob - controls/edit.c

   1 /*
   2  *      Edit control
   3  *
   4  *      Copyright  David W. Metcalfe, 1994
   5  *      Copyright  William Magro, 1995, 1996
   6  *      Copyright  Frans van Dorsselaer, 1996, 1997
   7  *
   8  */
   9
  10 /*
  11  *      please read EDIT.TODO (and update it when you change things)
  12  */
  13
  14 #include "config.h"
  15
  16 #include <string.h>
  17 #include <stdlib.h>
  18
  19 #include "winbase.h"
  20 #include "winnt.h"
  21 #include "win.h"
  22 #include "wine/winbase16.h"
  23 #include "wine/winuser16.h"
  24 #include "wine/unicode.h"
  25 #include "controls.h"
  26 #include "local.h"
  27 #include "user.h"
  28 #include "debugtools.h"
  29
  30 DEFAULT_DEBUG_CHANNEL(edit);
  31 DECLARE_DEBUG_CHANNEL(combo);
  32 DECLARE_DEBUG_CHANNEL(relay);
  33
  34 #define BUFLIMIT_MULTI          65534   /* maximum buffer size (not including '\0')
  35                                            FIXME: BTW, new specs say 65535 (do you dare ???) */
  36 #define BUFLIMIT_SINGLE         32766   /* maximum buffer size (not including '\0') */
  37 #define GROWLENGTH              32      /* buffers granularity in bytes: must be power of 2 */
  38 #define ROUND_TO_GROW(size)     (((size) + (GROWLENGTH - 1)) & ~(GROWLENGTH - 1))
  39 #define HSCROLL_FRACTION        3       /* scroll window by 1/3 width */
  40
  41 /*
  42  *      extra flags for EDITSTATE.flags field
  43  */
  44 #define EF_MODIFIED             0x0001  /* text has been modified */
  45 #define EF_FOCUSED              0x0002  /* we have input focus */
  46 #define EF_UPDATE               0x0004  /* notify parent of changed state */
  47 #define EF_VSCROLL_TRACK        0x0008  /* don't SetScrollPos() since we are tracking the thumb */
  48 #define EF_HSCROLL_TRACK        0x0010  /* don't SetScrollPos() since we are tracking the thumb */
  49 #define EF_AFTER_WRAP           0x0080  /* the caret is displayed after the last character of a
  50                                            wrapped line, instead of in front of the next character */
  51 #define EF_USE_SOFTBRK          0x0100  /* Enable soft breaks in text. */
  52
  53 typedef enum
  54 {
  55         END_0 = 0,      /* line ends with terminating '\0' character */
  56         END_WRAP,       /* line is wrapped */
  57         END_HARD,       /* line ends with a hard return '\r\n' */
  58         END_SOFT        /* line ends with a soft return '\r\r\n' */
  59 } LINE_END;
  60
  61 typedef struct tagLINEDEF {
  62         INT length;             /* bruto length of a line in bytes */
  63         INT net_length; /* netto length of a line in visible characters */
  64         LINE_END ending;
  65         INT width;              /* width of the line in pixels */
  66         INT index; /* line index into the buffer */
  67         struct tagLINEDEF *next;
  68 } LINEDEF;
  69
  70 typedef struct
  71 {
  72         BOOL is_unicode;                /* how the control was created */
  73         LPWSTR text;                    /* the actual contents of the control */
  74         UINT buffer_size;               /* the size of the buffer in characters */
  75         UINT buffer_limit;              /* the maximum size to which the buffer may grow in characters */
  76         HFONT font;                     /* NULL means standard system font */
  77         INT x_offset;                   /* scroll offset        for multi lines this is in pixels
  78                                                                 for single lines it's in characters */
  79         INT line_height;                /* height of a screen line in pixels */
  80         INT char_width;         /* average character width in pixels */
  81         DWORD style;                    /* sane version of wnd->dwStyle */
  82         WORD flags;                     /* flags that are not in es->style or wnd->flags (EF_XXX) */
  83         INT undo_insert_count;  /* number of characters inserted in sequence */
  84         UINT undo_position;             /* character index of the insertion and deletion */
  85         LPWSTR undo_text;               /* deleted text */
  86         UINT undo_buffer_size;          /* size of the deleted text buffer */
  87         INT selection_start;            /* == selection_end if no selection */
  88         INT selection_end;              /* == current caret position */
  89         WCHAR password_char;            /* == 0 if no password char, and for multi line controls */
  90         INT left_margin;                /* in pixels */
  91         INT right_margin;               /* in pixels */
  92         RECT format_rect;
  93         INT text_width;                 /* width of the widest line in pixels for multi line controls
  94                                            and just line width for single line controls */
  95         INT region_posx;                /* Position of cursor relative to region: */
  96         INT region_posy;                /* -1: to left, 0: within, 1: to right */
  97         EDITWORDBREAKPROC16 word_break_proc16;
  98         void *word_break_proc;          /* 32-bit word break proc: ANSI or Unicode */
  99         INT line_count;         /* number of lines */
 100         INT y_offset;                   /* scroll offset in number of lines */
 101         BOOL bCaptureState; /* flag indicating whether mouse was captured */
 102         BOOL bEnableState;             /* flag keeping the enable state */
 103         HWND hwndParent;               /* Handle of parent for sending EN_* messages.
 104                                           Even if parent will change, EN_* messages
 105                                           should be sent to the first parent. */
 106         HWND hwndListBox;              /* handle of ComboBox's listbox or NULL */
 107         /*
 108          *      only for multi line controls
 109          */
 110         INT lock_count;         /* amount of re-entries in the EditWndProc */
 111         INT tabs_count;
 112         LPINT tabs;
 113         LINEDEF *first_line_def;        /* linked list of (soft) linebreaks */
 114         HLOCAL hloc32W;         /* our unicode local memory block */
 115         HLOCAL16 hloc16;        /* alias for 16-bit control receiving EM_GETHANDLE16
 116                                    or EM_SETHANDLE16 */
 117         HLOCAL hloc32A;         /* alias for ANSI control receiving EM_GETHANDLE
 118                                    or EM_SETHANDLE */
 119 } EDITSTATE;
 120
 121
 122 #define SWAP_INT32(x,y) do { INT temp = (INT)(x); (x) = (INT)(y); (y) = temp; } while(0)
 123 #define ORDER_INT(x,y) do { if ((INT)(y) < (INT)(x)) SWAP_INT32((x),(y)); } while(0)
 124
 125 #define SWAP_UINT32(x,y) do { UINT temp = (UINT)(x); (x) = (UINT)(y); (y) = temp; } while(0)
 126 #define ORDER_UINT(x,y) do { if ((UINT)(y) < (UINT)(x)) SWAP_UINT32((x),(y)); } while(0)
 127
 128 #define DPRINTF_EDIT_NOTIFY(hwnd, str) \
 129         do {TRACE("notification " str " sent to hwnd=%08x\n", \
 130                        (UINT)(hwnd));} while(0)
 131
 132 /* used for disabled or read-only edit control */
 133 #define EDIT_SEND_CTLCOLORSTATIC(hwnd,hdc) \
 134         (SendMessageW(GetParent(hwnd), WM_CTLCOLORSTATIC, \
 135                         (WPARAM)(hdc), (LPARAM)(hwnd)))
 136 #define EDIT_SEND_CTLCOLOR(hwnd,hdc) \
 137         (SendMessageW(GetParent(hwnd), WM_CTLCOLOREDIT, \
 138                         (WPARAM)(hdc), (LPARAM)(hwnd)))
 139 #define EDIT_NOTIFY_PARENT(hwnd, es, wNotifyCode, str) \
 140         do \
 141         { /* Notify parent which has created this edit control */ \
 142             DPRINTF_EDIT_NOTIFY((es)->hwndParent, str); \
 143             SendMessageW((es)->hwndParent, WM_COMMAND, \
 144                      MAKEWPARAM(GetWindowLongA((hwnd),GWL_ID), wNotifyCode), \
 145                      (LPARAM)(hwnd)); \
 146         } while(0)
 147 #define DPRINTF_EDIT_MSG16(str) \
 148         TRACE(\
 149                      "16 bit : " str ": hwnd=%08x, wParam=%08x, lParam=%08x\n", \
 150                      hwnd, (UINT)wParam, (UINT)lParam)
 151 #define DPRINTF_EDIT_MSG32(str) \
 152         TRACE(\
 153                      "32 bit %c : " str ": hwnd=%08x, wParam=%08x, lParam=%08x\n", \
 154                      unicode ? 'W' : 'A', \
 155                      hwnd, (UINT)wParam, (UINT)lParam)
 156
 157 /*********************************************************************
 158  *
 159  *      Declarations
 160  *
 161  */
 162
 163 /*
 164  *      These functions have trivial implementations
 165  *      We still like to call them internally
 166  *      "static inline" makes them more like macro's
 167  */
 168 static inline BOOL      EDIT_EM_CanUndo(EDITSTATE *es);
 169 static inline void      EDIT_EM_EmptyUndoBuffer(EDITSTATE *es);
 170 static inline void      EDIT_WM_Clear(HWND hwnd, EDITSTATE *es);
 171 static inline void      EDIT_WM_Cut(HWND hwnd, EDITSTATE *es);
 172
 173 /*
 174  *      Helper functions only valid for one type of control
 175  */
 176 static void     EDIT_BuildLineDefs_ML(HWND hwnd, EDITSTATE *es, INT iStart, INT iEnd, INT delta, HRGN hrgn);
 177 static void     EDIT_CalcLineWidth_SL(HWND hwnd, EDITSTATE *es);
 178 static LPWSTR   EDIT_GetPasswordPointer_SL(EDITSTATE *es);
 179 static void     EDIT_MoveDown_ML(HWND hwnd, EDITSTATE *es, BOOL extend);
 180 static void     EDIT_MovePageDown_ML(HWND hwnd, EDITSTATE *es, BOOL extend);
 181 static void     EDIT_MovePageUp_ML(HWND hwnd, EDITSTATE *es, BOOL extend);
 182 static void     EDIT_MoveUp_ML(HWND hwnd, EDITSTATE *es, BOOL extend);
 183 /*
 184  *      Helper functions valid for both single line _and_ multi line controls
 185  */
 186 static INT      EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action);
 187 static INT      EDIT_CharFromPos(HWND hwnd, EDITSTATE *es, INT x, INT y, LPBOOL after_wrap);
 188 static void     EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y);
 189 static void     EDIT_GetLineRect(HWND hwnd, EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc);
 190 static void     EDIT_InvalidateText(HWND hwnd, EDITSTATE *es, INT start, INT end);
 191 static void     EDIT_LockBuffer(HWND hwnd, EDITSTATE *es);
 192 static BOOL     EDIT_MakeFit(HWND hwnd, EDITSTATE *es, UINT size);
 193 static BOOL     EDIT_MakeUndoFit(EDITSTATE *es, UINT size);
 194 static void     EDIT_MoveBackward(HWND hwnd, EDITSTATE *es, BOOL extend);
 195 static void     EDIT_MoveEnd(HWND hwnd, EDITSTATE *es, BOOL extend);
 196 static void     EDIT_MoveForward(HWND hwnd, EDITSTATE *es, BOOL extend);
 197 static void     EDIT_MoveHome(HWND hwnd, EDITSTATE *es, BOOL extend);
 198 static void     EDIT_MoveWordBackward(HWND hwnd, EDITSTATE *es, BOOL extend);
 199 static void     EDIT_MoveWordForward(HWND hwnd, EDITSTATE *es, BOOL extend);
 200 static void     EDIT_PaintLine(HWND hwnd, EDITSTATE *es, HDC hdc, INT line, BOOL rev);
 201 static INT      EDIT_PaintText(EDITSTATE *es, HDC hdc, INT x, INT y, INT line, INT col, INT count, BOOL rev);
 202 static void     EDIT_SetCaretPos(HWND hwnd, EDITSTATE *es, INT pos, BOOL after_wrap);
 203 static void     EDIT_SetRectNP(HWND hwnd, EDITSTATE *es, LPRECT lprc);
 204 static void     EDIT_UnlockBuffer(HWND hwnd, EDITSTATE *es, BOOL force);
 205 static void     EDIT_UpdateScrollInfo(HWND hwnd, EDITSTATE *es);
 206 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action);
 207 /*
 208  *      EM_XXX message handlers
 209  */
 210 static LRESULT  EDIT_EM_CharFromPos(HWND hwnd, EDITSTATE *es, INT x, INT y);
 211 static BOOL     EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol);
 212 static HLOCAL   EDIT_EM_GetHandle(EDITSTATE *es);
 213 static HLOCAL16 EDIT_EM_GetHandle16(HWND hwnd, EDITSTATE *es);
 214 static INT      EDIT_EM_GetLine(EDITSTATE *es, INT line, LPARAM lParam, BOOL unicode);
 215 static LRESULT  EDIT_EM_GetSel(EDITSTATE *es, LPUINT start, LPUINT end);
 216 static LRESULT  EDIT_EM_GetThumb(HWND hwnd, EDITSTATE *es);
 217 static INT      EDIT_EM_LineFromChar(EDITSTATE *es, INT index);
 218 static INT      EDIT_EM_LineIndex(EDITSTATE *es, INT line);
 219 static INT      EDIT_EM_LineLength(EDITSTATE *es, INT index);
 220 static BOOL     EDIT_EM_LineScroll(HWND hwnd, EDITSTATE *es, INT dx, INT dy);
 221 static BOOL     EDIT_EM_LineScroll_internal(HWND hwnd, EDITSTATE *es, INT dx, INT dy);
 222 static LRESULT  EDIT_EM_PosFromChar(HWND hwnd, EDITSTATE *es, INT index, BOOL after_wrap);
 223 static void     EDIT_EM_ReplaceSel(HWND hwnd, EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update);
 224 static LRESULT  EDIT_EM_Scroll(HWND hwnd, EDITSTATE *es, INT action);
 225 static void     EDIT_EM_ScrollCaret(HWND hwnd, EDITSTATE *es);
 226 static void     EDIT_EM_SetHandle(HWND hwnd, EDITSTATE *es, HLOCAL hloc);
 227 static void     EDIT_EM_SetHandle16(HWND hwnd, EDITSTATE *es, HLOCAL16 hloc);
 228 static void     EDIT_EM_SetLimitText(EDITSTATE *es, INT limit);
 229 static void     EDIT_EM_SetMargins(EDITSTATE *es, INT action, INT left, INT right);
 230 static void     EDIT_EM_SetPasswordChar(HWND hwnd, EDITSTATE *es, WCHAR c);
 231 static void     EDIT_EM_SetSel(HWND hwnd, EDITSTATE *es, UINT start, UINT end, BOOL after_wrap);
 232 static BOOL     EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs);
 233 static BOOL     EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs);
 234 static void     EDIT_EM_SetWordBreakProc(HWND hwnd, EDITSTATE *es, LPARAM lParam);
 235 static void     EDIT_EM_SetWordBreakProc16(HWND hwnd, EDITSTATE *es, EDITWORDBREAKPROC16 wbp);
 236 static BOOL     EDIT_EM_Undo(HWND hwnd, EDITSTATE *es);
 237 /*
 238  *      WM_XXX message handlers
 239  */
 240 static void     EDIT_WM_Char(HWND hwnd, EDITSTATE *es, WCHAR c);
 241 static void     EDIT_WM_Command(HWND hwnd, EDITSTATE *es, INT code, INT id, HWND conrtol);
 242 static void     EDIT_WM_ContextMenu(HWND hwnd, EDITSTATE *es, INT x, INT y);
 243 static void     EDIT_WM_Copy(HWND hwnd, EDITSTATE *es);
 244 static LRESULT  EDIT_WM_Create(HWND hwnd, EDITSTATE *es, LPCWSTR name);
 245 static void     EDIT_WM_Destroy(HWND hwnd, EDITSTATE *es);
 246 static LRESULT  EDIT_WM_EraseBkGnd(HWND hwnd, EDITSTATE *es, HDC dc);
 247 static INT      EDIT_WM_GetText(EDITSTATE *es, INT count, LPARAM lParam, BOOL unicode);
 248 static LRESULT  EDIT_WM_HScroll(HWND hwnd, EDITSTATE *es, INT action, INT pos);
 249 static LRESULT  EDIT_WM_KeyDown(HWND hwnd, EDITSTATE *es, INT key);
 250 static LRESULT  EDIT_WM_KillFocus(HWND hwnd, EDITSTATE *es);
 251 static LRESULT  EDIT_WM_LButtonDblClk(HWND hwnd, EDITSTATE *es);
 252 static LRESULT  EDIT_WM_LButtonDown(HWND hwnd, EDITSTATE *es, DWORD keys, INT x, INT y);
 253 static LRESULT  EDIT_WM_LButtonUp(HWND hwndSelf, EDITSTATE *es);
 254 static LRESULT  EDIT_WM_MButtonDown(HWND hwnd);
 255 static LRESULT  EDIT_WM_MouseMove(HWND hwnd, EDITSTATE *es, INT x, INT y);
 256 static LRESULT  EDIT_WM_NCCreate(HWND hwnd, DWORD style, HWND hwndParent, BOOL unicode);
 257 static void     EDIT_WM_Paint(HWND hwnd, EDITSTATE *es, WPARAM wParam);
 258 static void     EDIT_WM_Paste(HWND hwnd, EDITSTATE *es);
 259 static void     EDIT_WM_SetFocus(HWND hwnd, EDITSTATE *es);
 260 static void     EDIT_WM_SetFont(HWND hwnd, EDITSTATE *es, HFONT font, BOOL redraw);
 261 static void     EDIT_WM_SetText(HWND hwnd, EDITSTATE *es, LPARAM lParam, BOOL unicode);
 262 static void     EDIT_WM_Size(HWND hwnd, EDITSTATE *es, UINT action, INT width, INT height);
 263 static LRESULT  EDIT_WM_StyleChanged (HWND hwnd, EDITSTATE *es, WPARAM which, const STYLESTRUCT *style);
 264 static LRESULT  EDIT_WM_SysKeyDown(HWND hwnd, EDITSTATE *es, INT key, DWORD key_data);
 265 static void     EDIT_WM_Timer(HWND hwnd, EDITSTATE *es);
 266 static LRESULT  EDIT_WM_VScroll(HWND hwnd, EDITSTATE *es, INT action, INT pos);
 267 static void EDIT_UpdateText(HWND hwnd, EDITSTATE *es, LPRECT rc, BOOL bErase);
 268 static void EDIT_UpdateTextRegion(HWND hwnd, EDITSTATE *es, HRGN hrgn, BOOL bErase);
 269
 270 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 271 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 272
 273 /*********************************************************************
 274  * edit class descriptor
 275  */
 276 const struct builtin_class_descr EDIT_builtin_class =
 277 {
 278     "Edit",               /* name */
 279     CS_GLOBALCLASS | CS_DBLCLKS /*| CS_PARENTDC*/,   /* style */
 280     EditWndProcA,         /* procA */
 281     EditWndProcW,         /* procW */
 282     sizeof(EDITSTATE *),  /* extra */
 283     IDC_IBEAMA,           /* cursor */
 284     0                     /* brush */
 285 };
 286
 287
 288 /*********************************************************************
 289  *
 290  *      EM_CANUNDO
 291  *
 292  */
 293 static inline BOOL EDIT_EM_CanUndo(EDITSTATE *es)
 294 {
 295         return (es->undo_insert_count || strlenW(es->undo_text));
 296 }
 297
 298
 299 /*********************************************************************
 300  *
 301  *      EM_EMPTYUNDOBUFFER
 302  *
 303  */
 304 static inline void EDIT_EM_EmptyUndoBuffer(EDITSTATE *es)
 305 {
 306         es->undo_insert_count = 0;
 307         *es->undo_text = '\0';
 308 }
 309
 310
 311 /*********************************************************************
 312  *
 313  *      WM_CLEAR
 314  *
 315  */
 316 static inline void EDIT_WM_Clear(HWND hwnd, EDITSTATE *es)
 317 {
 318         static const WCHAR empty_stringW[] = {0};
 319
 320         /* Protect read-only edit control from modification */
 321         if(es->style & ES_READONLY)
 322             return;
 323
 324         EDIT_EM_ReplaceSel(hwnd, es, TRUE, empty_stringW, TRUE);
 325 }
 326
 327
 328 /*********************************************************************
 329  *
 330  *      WM_CUT
 331  *
 332  */
 333 static inline void EDIT_WM_Cut(HWND hwnd, EDITSTATE *es)
 334 {
 335         EDIT_WM_Copy(hwnd, es);
 336         EDIT_WM_Clear(hwnd, es);
 337 }
 338
 339
 340 /**********************************************************************
 341  *         get_app_version
 342  *
 343  * Returns the window version in case Wine emulates a later version
 344  * of windows then the application expects.
 345  *
 346  * In a number of cases when windows runs an application that was
 347  * designed for an earlier windows version, windows reverts
 348  * to "old" behaviour of that earlier version.
 349  *
 350  * An example is a disabled  edit control that needs to be painted.
 351  * Old style behaviour is to send a WM_CTLCOLOREDIT message. This was
 352  * changed in Win95, NT4.0 by a WM_CTLCOLORSTATIC message _only_ for
 353  * applications with an expected version 0f 4.0 or higher.
 354  *
 355  */
 356 static DWORD get_app_version(void)
 357 {
 358     static DWORD version;
 359     if (!version)
 360     {
 361         DWORD dwEmulatedVersion;
 362         OSVERSIONINFOW info;
 363         DWORD dwProcVersion = GetProcessVersion(0);
 364
 365         info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);
 366         GetVersionExW( &info );
 367         dwEmulatedVersion = MAKELONG( info.dwMinorVersion, info.dwMajorVersion );
 368         /* fixme: this may not be 100% correct; see discussion on the
 369          * wine developer list in Nov 1999 */
 370         version = dwProcVersion < dwEmulatedVersion ? dwProcVersion : dwEmulatedVersion;
 371     }
 372     return version;
 373 }
 374
 375
 376 /*********************************************************************
 377  *
 378  *      EditWndProc_common
 379  *
 380  *      The messages are in the order of the actual integer values
 381  *      (which can be found in include/windows.h)
 382  *      Wherever possible the 16 bit versions are converted to
 383  *      the 32 bit ones, so that we can 'fall through' to the
 384  *      helper functions.  These are mostly 32 bit (with a few
 385  *      exceptions, clearly indicated by a '16' extension to their
 386  *      names).
 387  *
 388  */
 389 static LRESULT WINAPI EditWndProc_common( HWND hwnd, UINT msg,
 390                                           WPARAM wParam, LPARAM lParam, BOOL unicode )
 391 {
 392         EDITSTATE *es = (EDITSTATE *)GetWindowLongA( hwnd, 0 );
 393         LRESULT result = 0;
 394
 395         switch (msg) {
 396         case WM_DESTROY:
 397                 DPRINTF_EDIT_MSG32("WM_DESTROY");
 398                 if (es) EDIT_WM_Destroy(hwnd, es);
 399                 result = 0;
 400                 goto END;
 401
 402         case WM_NCCREATE:
 403                 DPRINTF_EDIT_MSG32("WM_NCCREATE");
 404                 if(unicode)
 405                 {
 406                     LPCREATESTRUCTW cs = (LPCREATESTRUCTW)lParam;
 407                     result = EDIT_WM_NCCreate(hwnd, cs->style, cs->hwndParent, TRUE);
 408                 }
 409                 else
 410                 {
 411                     LPCREATESTRUCTA cs = (LPCREATESTRUCTA)lParam;
 412                     result = EDIT_WM_NCCreate(hwnd, cs->style, cs->hwndParent, FALSE);
 413                 }
 414                 goto END;
 415         }
 416
 417         if (!es)
 418         {
 419             if(unicode)
 420                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 421             else
 422                 result = DefWindowProcA(hwnd, msg, wParam, lParam);
 423             goto END;
 424         }
 425
 426
 427         EDIT_LockBuffer(hwnd, es);
 428         switch (msg) {
 429         case EM_GETSEL16:
 430                 DPRINTF_EDIT_MSG16("EM_GETSEL");
 431                 wParam = 0;
 432                 lParam = 0;
 433                 /* fall through */
 434         case EM_GETSEL:
 435                 DPRINTF_EDIT_MSG32("EM_GETSEL");
 436                 result = EDIT_EM_GetSel(es, (LPUINT)wParam, (LPUINT)lParam);
 437                 break;
 438
 439         case EM_SETSEL16:
 440                 DPRINTF_EDIT_MSG16("EM_SETSEL");
 441                 if (SLOWORD(lParam) == -1)
 442                         EDIT_EM_SetSel(hwnd, es, (UINT)-1, 0, FALSE);
 443                 else
 444                         EDIT_EM_SetSel(hwnd, es, LOWORD(lParam), HIWORD(lParam), FALSE);
 445                 if (!wParam)
 446                         EDIT_EM_ScrollCaret(hwnd, es);
 447                 result = 1;
 448                 break;
 449         case EM_SETSEL:
 450                 DPRINTF_EDIT_MSG32("EM_SETSEL");
 451                 EDIT_EM_SetSel(hwnd, es, wParam, lParam, FALSE);
 452                 EDIT_EM_ScrollCaret(hwnd, es);
 453                 result = 1;
 454                 break;
 455
 456         case EM_GETRECT16:
 457                 DPRINTF_EDIT_MSG16("EM_GETRECT");
 458                 if (lParam)
 459                         CONV_RECT32TO16(&es->format_rect, MapSL(lParam));
 460                 break;
 461         case EM_GETRECT:
 462                 DPRINTF_EDIT_MSG32("EM_GETRECT");
 463                 if (lParam)
 464                         CopyRect((LPRECT)lParam, &es->format_rect);
 465                 break;
 466
 467         case EM_SETRECT16:
 468                 DPRINTF_EDIT_MSG16("EM_SETRECT");
 469                 if ((es->style & ES_MULTILINE) && lParam) {
 470                         RECT rc;
 471                         CONV_RECT16TO32(MapSL(lParam), &rc);
 472                         EDIT_SetRectNP(hwnd, es, &rc);
 473                         EDIT_UpdateText(hwnd, es, NULL, TRUE);
 474                 }
 475                 break;
 476         case EM_SETRECT:
 477                 DPRINTF_EDIT_MSG32("EM_SETRECT");
 478                 if ((es->style & ES_MULTILINE) && lParam) {
 479                         EDIT_SetRectNP(hwnd, es, (LPRECT)lParam);
 480                         EDIT_UpdateText(hwnd, es, NULL, TRUE);
 481                 }
 482                 break;
 483
 484         case EM_SETRECTNP16:
 485                 DPRINTF_EDIT_MSG16("EM_SETRECTNP");
 486                 if ((es->style & ES_MULTILINE) && lParam) {
 487                         RECT rc;
 488                         CONV_RECT16TO32(MapSL(lParam), &rc);
 489                         EDIT_SetRectNP(hwnd, es, &rc);
 490                 }
 491                 break;
 492         case EM_SETRECTNP:
 493                 DPRINTF_EDIT_MSG32("EM_SETRECTNP");
 494                 if ((es->style & ES_MULTILINE) && lParam)
 495                         EDIT_SetRectNP(hwnd, es, (LPRECT)lParam);
 496                 break;
 497
 498         case EM_SCROLL16:
 499                 DPRINTF_EDIT_MSG16("EM_SCROLL");
 500                 /* fall through */
 501         case EM_SCROLL:
 502                 DPRINTF_EDIT_MSG32("EM_SCROLL");
 503                 result = EDIT_EM_Scroll(hwnd, es, (INT)wParam);
 504                 break;
 505
 506         case EM_LINESCROLL16:
 507                 DPRINTF_EDIT_MSG16("EM_LINESCROLL");
 508                 wParam = (WPARAM)(INT)SHIWORD(lParam);
 509                 lParam = (LPARAM)(INT)SLOWORD(lParam);
 510                 /* fall through */
 511         case EM_LINESCROLL:
 512                 DPRINTF_EDIT_MSG32("EM_LINESCROLL");
 513                 result = (LRESULT)EDIT_EM_LineScroll(hwnd, es, (INT)wParam, (INT)lParam);
 514                 break;
 515
 516         case EM_SCROLLCARET16:
 517                 DPRINTF_EDIT_MSG16("EM_SCROLLCARET");
 518                 /* fall through */
 519         case EM_SCROLLCARET:
 520                 DPRINTF_EDIT_MSG32("EM_SCROLLCARET");
 521                 EDIT_EM_ScrollCaret(hwnd, es);
 522                 result = 1;
 523                 break;
 524
 525         case EM_GETMODIFY16:
 526                 DPRINTF_EDIT_MSG16("EM_GETMODIFY");
 527                 /* fall through */
 528         case EM_GETMODIFY:
 529                 DPRINTF_EDIT_MSG32("EM_GETMODIFY");
 530                 result = ((es->flags & EF_MODIFIED) != 0);
 531                 break;
 532
 533         case EM_SETMODIFY16:
 534                 DPRINTF_EDIT_MSG16("EM_SETMODIFY");
 535                 /* fall through */
 536         case EM_SETMODIFY:
 537                 DPRINTF_EDIT_MSG32("EM_SETMODIFY");
 538                 if (wParam)
 539                         es->flags |= EF_MODIFIED;
 540                 else
 541                         es->flags &= ~(EF_MODIFIED | EF_UPDATE);  /* reset pending updates */
 542                 break;
 543
 544         case EM_GETLINECOUNT16:
 545                 DPRINTF_EDIT_MSG16("EM_GETLINECOUNT");
 546                 /* fall through */
 547         case EM_GETLINECOUNT:
 548                 DPRINTF_EDIT_MSG32("EM_GETLINECOUNT");
 549                 result = (es->style & ES_MULTILINE) ? es->line_count : 1;
 550                 break;
 551
 552         case EM_LINEINDEX16:
 553                 DPRINTF_EDIT_MSG16("EM_LINEINDEX");
 554                 if ((INT16)wParam == -1)
 555                         wParam = (WPARAM)-1;
 556                 /* fall through */
 557         case EM_LINEINDEX:
 558                 DPRINTF_EDIT_MSG32("EM_LINEINDEX");
 559                 result = (LRESULT)EDIT_EM_LineIndex(es, (INT)wParam);
 560                 break;
 561
 562         case EM_SETHANDLE16:
 563                 DPRINTF_EDIT_MSG16("EM_SETHANDLE");
 564                 EDIT_EM_SetHandle16(hwnd, es, (HLOCAL16)wParam);
 565                 break;
 566         case EM_SETHANDLE:
 567                 DPRINTF_EDIT_MSG32("EM_SETHANDLE");
 568                 EDIT_EM_SetHandle(hwnd, es, (HLOCAL)wParam);
 569                 break;
 570
 571         case EM_GETHANDLE16:
 572                 DPRINTF_EDIT_MSG16("EM_GETHANDLE");
 573                 result = (LRESULT)EDIT_EM_GetHandle16(hwnd, es);
 574                 break;
 575         case EM_GETHANDLE:
 576                 DPRINTF_EDIT_MSG32("EM_GETHANDLE");
 577                 result = (LRESULT)EDIT_EM_GetHandle(es);
 578                 break;
 579
 580         case EM_GETTHUMB16:
 581                 DPRINTF_EDIT_MSG16("EM_GETTHUMB");
 582                 /* fall through */
 583         case EM_GETTHUMB:
 584                 DPRINTF_EDIT_MSG32("EM_GETTHUMB");
 585                 result = EDIT_EM_GetThumb(hwnd, es);
 586                 break;
 587
 588         /* messages 0x00bf and 0x00c0 missing from specs */
 589
 590         case WM_USER+15:
 591                 DPRINTF_EDIT_MSG16("undocumented WM_USER+15, please report");
 592                 /* fall through */
 593         case 0x00bf:
 594                 DPRINTF_EDIT_MSG32("undocumented 0x00bf, please report");
 595                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 596                 break;
 597
 598         case WM_USER+16:
 599                 DPRINTF_EDIT_MSG16("undocumented WM_USER+16, please report");
 600                 /* fall through */
 601         case 0x00c0:
 602                 DPRINTF_EDIT_MSG32("undocumented 0x00c0, please report");
 603                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 604                 break;
 605
 606         case EM_LINELENGTH16:
 607                 DPRINTF_EDIT_MSG16("EM_LINELENGTH");
 608                 /* fall through */
 609         case EM_LINELENGTH:
 610                 DPRINTF_EDIT_MSG32("EM_LINELENGTH");
 611                 result = (LRESULT)EDIT_EM_LineLength(es, (INT)wParam);
 612                 break;
 613
 614         case EM_REPLACESEL16:
 615                 DPRINTF_EDIT_MSG16("EM_REPLACESEL");
 616                 lParam = (LPARAM)MapSL(lParam);
 617                 unicode = FALSE;  /* 16-bit message is always ascii */
 618                 /* fall through */
 619         case EM_REPLACESEL:
 620         {
 621                 LPWSTR textW;
 622                 DPRINTF_EDIT_MSG32("EM_REPLACESEL");
 623
 624                 if(unicode)
 625                     textW = (LPWSTR)lParam;
 626                 else
 627                 {
 628                     LPSTR textA = (LPSTR)lParam;
 629                     INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
 630                     if((textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 631                         MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
 632                 }
 633
 634                 EDIT_EM_ReplaceSel(hwnd, es, (BOOL)wParam, textW, TRUE);
 635                 result = 1;
 636
 637                 if(!unicode)
 638                     HeapFree(GetProcessHeap(), 0, textW);
 639                 break;
 640         }
 641         /* message 0x00c3 missing from specs */
 642
 643         case WM_USER+19:
 644                 DPRINTF_EDIT_MSG16("undocumented WM_USER+19, please report");
 645                 /* fall through */
 646         case 0x00c3:
 647                 DPRINTF_EDIT_MSG32("undocumented 0x00c3, please report");
 648                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 649                 break;
 650
 651         case EM_GETLINE16:
 652                 DPRINTF_EDIT_MSG16("EM_GETLINE");
 653                 lParam = (LPARAM)MapSL(lParam);
 654                 unicode = FALSE;  /* 16-bit message is always ascii */
 655                 /* fall through */
 656         case EM_GETLINE:
 657                 DPRINTF_EDIT_MSG32("EM_GETLINE");
 658                 result = (LRESULT)EDIT_EM_GetLine(es, (INT)wParam, lParam, unicode);
 659                 break;
 660
 661         case EM_LIMITTEXT16:
 662                 DPRINTF_EDIT_MSG16("EM_LIMITTEXT");
 663                 /* fall through */
 664         case EM_SETLIMITTEXT:
 665                 DPRINTF_EDIT_MSG32("EM_SETLIMITTEXT");
 666                 EDIT_EM_SetLimitText(es, (INT)wParam);
 667                 break;
 668
 669         case EM_CANUNDO16:
 670                 DPRINTF_EDIT_MSG16("EM_CANUNDO");
 671                 /* fall through */
 672         case EM_CANUNDO:
 673                 DPRINTF_EDIT_MSG32("EM_CANUNDO");
 674                 result = (LRESULT)EDIT_EM_CanUndo(es);
 675                 break;
 676
 677         case EM_UNDO16:
 678                 DPRINTF_EDIT_MSG16("EM_UNDO");
 679                 /* fall through */
 680         case EM_UNDO:
 681                 /* fall through */
 682         case WM_UNDO:
 683                 DPRINTF_EDIT_MSG32("EM_UNDO / WM_UNDO");
 684                 result = (LRESULT)EDIT_EM_Undo(hwnd, es);
 685                 break;
 686
 687         case EM_FMTLINES16:
 688                 DPRINTF_EDIT_MSG16("EM_FMTLINES");
 689                 /* fall through */
 690         case EM_FMTLINES:
 691                 DPRINTF_EDIT_MSG32("EM_FMTLINES");
 692                 result = (LRESULT)EDIT_EM_FmtLines(es, (BOOL)wParam);
 693                 break;
 694
 695         case EM_LINEFROMCHAR16:
 696                 DPRINTF_EDIT_MSG16("EM_LINEFROMCHAR");
 697                 /* fall through */
 698         case EM_LINEFROMCHAR:
 699                 DPRINTF_EDIT_MSG32("EM_LINEFROMCHAR");
 700                 result = (LRESULT)EDIT_EM_LineFromChar(es, (INT)wParam);
 701                 break;
 702
 703         /* message 0x00ca missing from specs */
 704
 705         case WM_USER+26:
 706                 DPRINTF_EDIT_MSG16("undocumented WM_USER+26, please report");
 707                 /* fall through */
 708         case 0x00ca:
 709                 DPRINTF_EDIT_MSG32("undocumented 0x00ca, please report");
 710                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 711                 break;
 712
 713         case EM_SETTABSTOPS16:
 714                 DPRINTF_EDIT_MSG16("EM_SETTABSTOPS");
 715                 result = (LRESULT)EDIT_EM_SetTabStops16(es, (INT)wParam, MapSL(lParam));
 716                 break;
 717         case EM_SETTABSTOPS:
 718                 DPRINTF_EDIT_MSG32("EM_SETTABSTOPS");
 719                 result = (LRESULT)EDIT_EM_SetTabStops(es, (INT)wParam, (LPINT)lParam);
 720                 break;
 721
 722         case EM_SETPASSWORDCHAR16:
 723                 DPRINTF_EDIT_MSG16("EM_SETPASSWORDCHAR");
 724                 unicode = FALSE;  /* 16-bit message is always ascii */
 725                 /* fall through */
 726         case EM_SETPASSWORDCHAR:
 727         {
 728                 WCHAR charW = 0;
 729                 DPRINTF_EDIT_MSG32("EM_SETPASSWORDCHAR");
 730
 731                 if(unicode)
 732                     charW = (WCHAR)wParam;
 733                 else
 734                 {
 735                     CHAR charA = wParam;
 736                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 737                 }
 738
 739                 EDIT_EM_SetPasswordChar(hwnd, es, charW);
 740                 break;
 741         }
 742
 743         case EM_EMPTYUNDOBUFFER16:
 744                 DPRINTF_EDIT_MSG16("EM_EMPTYUNDOBUFFER");
 745                 /* fall through */
 746         case EM_EMPTYUNDOBUFFER:
 747                 DPRINTF_EDIT_MSG32("EM_EMPTYUNDOBUFFER");
 748                 EDIT_EM_EmptyUndoBuffer(es);
 749                 break;
 750
 751         case EM_GETFIRSTVISIBLELINE16:
 752                 DPRINTF_EDIT_MSG16("EM_GETFIRSTVISIBLELINE");
 753                 result = es->y_offset;
 754                 break;
 755         case EM_GETFIRSTVISIBLELINE:
 756                 DPRINTF_EDIT_MSG32("EM_GETFIRSTVISIBLELINE");
 757                 result = (es->style & ES_MULTILINE) ? es->y_offset : es->x_offset;
 758                 break;
 759
 760         case EM_SETREADONLY16:
 761                 DPRINTF_EDIT_MSG16("EM_SETREADONLY");
 762                 /* fall through */
 763         case EM_SETREADONLY:
 764                 DPRINTF_EDIT_MSG32("EM_SETREADONLY");
 765                 if (wParam) {
 766                     SetWindowLongA( hwnd, GWL_STYLE,
 767                                     GetWindowLongA( hwnd, GWL_STYLE ) | ES_READONLY );
 768                     es->style |= ES_READONLY;
 769                 } else {
 770                     SetWindowLongA( hwnd, GWL_STYLE,
 771                                     GetWindowLongA( hwnd, GWL_STYLE ) & ~ES_READONLY );
 772                     es->style &= ~ES_READONLY;
 773                 }
 774                 result = 1;
 775                 break;
 776
 777         case EM_SETWORDBREAKPROC16:
 778                 DPRINTF_EDIT_MSG16("EM_SETWORDBREAKPROC");
 779                 EDIT_EM_SetWordBreakProc16(hwnd, es, (EDITWORDBREAKPROC16)lParam);
 780                 break;
 781         case EM_SETWORDBREAKPROC:
 782                 DPRINTF_EDIT_MSG32("EM_SETWORDBREAKPROC");
 783                 EDIT_EM_SetWordBreakProc(hwnd, es, lParam);
 784                 break;
 785
 786         case EM_GETWORDBREAKPROC16:
 787                 DPRINTF_EDIT_MSG16("EM_GETWORDBREAKPROC");
 788                 result = (LRESULT)es->word_break_proc16;
 789                 break;
 790         case EM_GETWORDBREAKPROC:
 791                 DPRINTF_EDIT_MSG32("EM_GETWORDBREAKPROC");
 792                 result = (LRESULT)es->word_break_proc;
 793                 break;
 794
 795         case EM_GETPASSWORDCHAR16:
 796                 DPRINTF_EDIT_MSG16("EM_GETPASSWORDCHAR");
 797                 unicode = FALSE;  /* 16-bit message is always ascii */
 798                 /* fall through */
 799         case EM_GETPASSWORDCHAR:
 800         {
 801                 DPRINTF_EDIT_MSG32("EM_GETPASSWORDCHAR");
 802
 803                 if(unicode)
 804                     result = es->password_char;
 805                 else
 806                 {
 807                     WCHAR charW = es->password_char;
 808                     CHAR charA = 0;
 809                     WideCharToMultiByte(CP_ACP, 0, &charW, 1, &charA, 1, NULL, NULL);
 810                     result = charA;
 811                 }
 812                 break;
 813         }
 814
 815         /* The following EM_xxx are new to win95 and don't exist for 16 bit */
 816
 817         case EM_SETMARGINS:
 818                 DPRINTF_EDIT_MSG32("EM_SETMARGINS");
 819                 EDIT_EM_SetMargins(es, (INT)wParam, SLOWORD(lParam), SHIWORD(lParam));
 820                 break;
 821
 822         case EM_GETMARGINS:
 823                 DPRINTF_EDIT_MSG32("EM_GETMARGINS");
 824                 result = MAKELONG(es->left_margin, es->right_margin);
 825                 break;
 826
 827         case EM_GETLIMITTEXT:
 828                 DPRINTF_EDIT_MSG32("EM_GETLIMITTEXT");
 829                 result = es->buffer_limit;
 830                 break;
 831
 832         case EM_POSFROMCHAR:
 833                 DPRINTF_EDIT_MSG32("EM_POSFROMCHAR");
 834                 result = EDIT_EM_PosFromChar(hwnd, es, (INT)wParam, FALSE);
 835                 break;
 836
 837         case EM_CHARFROMPOS:
 838                 DPRINTF_EDIT_MSG32("EM_CHARFROMPOS");
 839                 result = EDIT_EM_CharFromPos(hwnd, es, SLOWORD(lParam), SHIWORD(lParam));
 840                 break;
 841
 842         /* End of the EM_ messages which were in numerical order; what order
 843          * are these in?  vaguely alphabetical?
 844          */
 845
 846         case WM_GETDLGCODE:
 847                 DPRINTF_EDIT_MSG32("WM_GETDLGCODE");
 848                 result = DLGC_HASSETSEL | DLGC_WANTCHARS | DLGC_WANTARROWS;
 849
 850                 if (lParam && (((LPMSG)lParam)->message == WM_KEYDOWN))
 851                 {
 852                    int vk = (int)((LPMSG)lParam)->wParam;
 853
 854                    if (vk == VK_RETURN && (GetWindowLongA( hwnd, GWL_STYLE ) & ES_WANTRETURN))
 855                    {
 856                       result |= DLGC_WANTMESSAGE;
 857                    }
 858                    else if (es->hwndListBox && (vk == VK_RETURN || vk == VK_ESCAPE))
 859                    {
 860                       if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 861                          result |= DLGC_WANTMESSAGE;
 862                    }
 863                 }
 864                 break;
 865
 866         case WM_CHAR:
 867         {
 868                 WCHAR charW;
 869                 DPRINTF_EDIT_MSG32("WM_CHAR");
 870
 871                 if(unicode)
 872                     charW = wParam;
 873                 else
 874                 {
 875                     CHAR charA = wParam;
 876                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 877                 }
 878
 879                 if ((charW == VK_RETURN || charW == VK_ESCAPE) && es->hwndListBox)
 880                 {
 881                    if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 882                       SendMessageW(GetParent(hwnd), WM_KEYDOWN, charW, 0);
 883                    break;
 884                 }
 885                 EDIT_WM_Char(hwnd, es, charW);
 886                 break;
 887         }
 888
 889         case WM_CLEAR:
 890                 DPRINTF_EDIT_MSG32("WM_CLEAR");
 891                 EDIT_WM_Clear(hwnd, es);
 892                 break;
 893
 894         case WM_COMMAND:
 895                 DPRINTF_EDIT_MSG32("WM_COMMAND");
 896                 EDIT_WM_Command(hwnd, es, HIWORD(wParam), LOWORD(wParam), (HWND)lParam);
 897                 break;
 898
 899         case WM_CONTEXTMENU:
 900                 DPRINTF_EDIT_MSG32("WM_CONTEXTMENU");
 901                 EDIT_WM_ContextMenu(hwnd, es, SLOWORD(lParam), SHIWORD(lParam));
 902                 break;
 903
 904         case WM_COPY:
 905                 DPRINTF_EDIT_MSG32("WM_COPY");
 906                 EDIT_WM_Copy(hwnd, es);
 907                 break;
 908
 909         case WM_CREATE:
 910                 DPRINTF_EDIT_MSG32("WM_CREATE");
 911                 if(unicode)
 912                     result = EDIT_WM_Create(hwnd, es, ((LPCREATESTRUCTW)lParam)->lpszName);
 913                 else
 914                 {
 915                     LPCSTR nameA = ((LPCREATESTRUCTA)lParam)->lpszName;
 916                     LPWSTR nameW = NULL;
 917                     if(nameA)
 918                     {
 919                         INT countW = MultiByteToWideChar(CP_ACP, 0, nameA, -1, NULL, 0);
 920                         if((nameW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 921                             MultiByteToWideChar(CP_ACP, 0, nameA, -1, nameW, countW);
 922                     }
 923                     result = EDIT_WM_Create(hwnd, es, nameW);
 924                     if(nameW)
 925                         HeapFree(GetProcessHeap(), 0, nameW);
 926                 }
 927                 break;
 928
 929         case WM_CUT:
 930                 DPRINTF_EDIT_MSG32("WM_CUT");
 931                 EDIT_WM_Cut(hwnd, es);
 932                 break;
 933
 934         case WM_ENABLE:
 935                 DPRINTF_EDIT_MSG32("WM_ENABLE");
 936                 es->bEnableState = (BOOL) wParam;
 937                 EDIT_UpdateText(hwnd, es, NULL, TRUE);
 938                 break;
 939
 940         case WM_ERASEBKGND:
 941                 DPRINTF_EDIT_MSG32("WM_ERASEBKGND");
 942                 result = EDIT_WM_EraseBkGnd(hwnd, es, (HDC)wParam);
 943                 break;
 944
 945         case WM_GETFONT:
 946                 DPRINTF_EDIT_MSG32("WM_GETFONT");
 947                 result = (LRESULT)es->font;
 948                 break;
 949
 950         case WM_GETTEXT:
 951                 DPRINTF_EDIT_MSG32("WM_GETTEXT");
 952                 result = (LRESULT)EDIT_WM_GetText(es, (INT)wParam, lParam, unicode);
 953                 break;
 954
 955         case WM_GETTEXTLENGTH:
 956                 DPRINTF_EDIT_MSG32("WM_GETTEXTLENGTH");
 957                 result = strlenW(es->text);
 958                 break;
 959
 960         case WM_HSCROLL:
 961                 DPRINTF_EDIT_MSG32("WM_HSCROLL");
 962                 result = EDIT_WM_HScroll(hwnd, es, LOWORD(wParam), SHIWORD(wParam));
 963                 break;
 964
 965         case WM_KEYDOWN:
 966                 DPRINTF_EDIT_MSG32("WM_KEYDOWN");
 967                 result = EDIT_WM_KeyDown(hwnd, es, (INT)wParam);
 968                 break;
 969
 970         case WM_KILLFOCUS:
 971                 DPRINTF_EDIT_MSG32("WM_KILLFOCUS");
 972                 result = EDIT_WM_KillFocus(hwnd, es);
 973                 break;
 974
 975         case WM_LBUTTONDBLCLK:
 976                 DPRINTF_EDIT_MSG32("WM_LBUTTONDBLCLK");
 977                 result = EDIT_WM_LButtonDblClk(hwnd, es);
 978                 break;
 979
 980         case WM_LBUTTONDOWN:
 981                 DPRINTF_EDIT_MSG32("WM_LBUTTONDOWN");
 982                 result = EDIT_WM_LButtonDown(hwnd, es, (DWORD)wParam, SLOWORD(lParam), SHIWORD(lParam));
 983                 break;
 984
 985         case WM_LBUTTONUP:
 986                 DPRINTF_EDIT_MSG32("WM_LBUTTONUP");
 987                 result = EDIT_WM_LButtonUp(hwnd, es);
 988                 break;
 989
 990         case WM_MBUTTONDOWN:
 991                 DPRINTF_EDIT_MSG32("WM_MBUTTONDOWN");
 992                 result = EDIT_WM_MButtonDown(hwnd);
 993                 break;
 994
 995         case WM_MOUSEACTIVATE:
 996                 /*
 997                  *      FIXME: maybe DefWindowProc() screws up, but it seems that
 998                  *              modeless dialog boxes need this.  If we don't do this, the focus
 999                  *              will _not_ be set by DefWindowProc() for edit controls in a
1000                  *              modeless dialog box ???
1001                  */
1002                 DPRINTF_EDIT_MSG32("WM_MOUSEACTIVATE");
1003                 SetFocus(hwnd);
1004                 result = MA_ACTIVATE;
1005                 break;
1006
1007         case WM_MOUSEMOVE:
1008                 /*
1009                  *      DPRINTF_EDIT_MSG32("WM_MOUSEMOVE");
1010                  */
1011                 result = EDIT_WM_MouseMove(hwnd, es, SLOWORD(lParam), SHIWORD(lParam));
1012                 break;
1013
1014         case WM_PAINT:
1015                 DPRINTF_EDIT_MSG32("WM_PAINT");
1016                 EDIT_WM_Paint(hwnd, es, wParam);
1017                 break;
1018
1019         case WM_PASTE:
1020                 DPRINTF_EDIT_MSG32("WM_PASTE");
1021                 EDIT_WM_Paste(hwnd, es);
1022                 break;
1023
1024         case WM_SETFOCUS:
1025                 DPRINTF_EDIT_MSG32("WM_SETFOCUS");
1026                 EDIT_WM_SetFocus(hwnd, es);
1027                 break;
1028
1029         case WM_SETFONT:
1030                 DPRINTF_EDIT_MSG32("WM_SETFONT");
1031                 EDIT_WM_SetFont(hwnd, es, (HFONT)wParam, LOWORD(lParam) != 0);
1032                 break;
1033
1034         case WM_SETREDRAW:
1035                 /* FIXME: actually set an internal flag and behave accordingly */
1036                 break;
1037
1038         case WM_SETTEXT:
1039                 DPRINTF_EDIT_MSG32("WM_SETTEXT");
1040                 EDIT_WM_SetText(hwnd, es, lParam, unicode);
1041                 result = TRUE;
1042                 break;
1043
1044         case WM_SIZE:
1045                 DPRINTF_EDIT_MSG32("WM_SIZE");
1046                 EDIT_WM_Size(hwnd, es, (UINT)wParam, LOWORD(lParam), HIWORD(lParam));
1047                 break;
1048
1049         case WM_STYLECHANGED:
1050                 DPRINTF_EDIT_MSG32("WM_STYLECHANGED");
1051                 result = EDIT_WM_StyleChanged (hwnd, es, wParam, (const STYLESTRUCT *)lParam);
1052                 break;
1053
1054         case WM_STYLECHANGING:
1055                 DPRINTF_EDIT_MSG32("WM_STYLECHANGING");
1056                 result = 0; /* See EDIT_WM_StyleChanged */
1057                 break;
1058
1059         case WM_SYSKEYDOWN:
1060                 DPRINTF_EDIT_MSG32("WM_SYSKEYDOWN");
1061                 result = EDIT_WM_SysKeyDown(hwnd, es, (INT)wParam, (DWORD)lParam);
1062                 break;
1063
1064         case WM_TIMER:
1065                 DPRINTF_EDIT_MSG32("WM_TIMER");
1066                 EDIT_WM_Timer(hwnd, es);
1067                 break;
1068
1069         case WM_VSCROLL:
1070                 DPRINTF_EDIT_MSG32("WM_VSCROLL");
1071                 result = EDIT_WM_VScroll(hwnd, es, LOWORD(wParam), SHIWORD(wParam));
1072                 break;
1073
1074         case WM_MOUSEWHEEL:
1075                 {
1076                     int gcWheelDelta = 0;
1077                     UINT pulScrollLines = 3;
1078                     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
1079
1080                     if (wParam & (MK_SHIFT | MK_CONTROL)) {
1081                         result = DefWindowProcW(hwnd, msg, wParam, lParam);
1082                         break;
1083                     }
1084                     gcWheelDelta -= SHIWORD(wParam);
1085                     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
1086                     {
1087                         int cLineScroll= (int) min((UINT) es->line_count, pulScrollLines);
1088                         cLineScroll *= (gcWheelDelta / WHEEL_DELTA);
1089                         result = EDIT_EM_LineScroll(hwnd, es, 0, cLineScroll);
1090                     }
1091                 }
1092                 break;
1093         default:
1094                 if(unicode)
1095                     result = DefWindowProcW(hwnd, msg, wParam, lParam);
1096                 else
1097                     result = DefWindowProcA(hwnd, msg, wParam, lParam);
1098                 break;
1099         }
1100         EDIT_UnlockBuffer(hwnd, es, FALSE);
1101     END:
1102         return result;
1103 }
1104
1105 /*********************************************************************
1106  *
1107  *      EditWndProcW   (USER32.@)
1108  */
1109 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
1110 {
1111     if (!IsWindow( hWnd )) return 0;
1112     return EditWndProc_common(hWnd, uMsg, wParam, lParam, TRUE);
1113 }
1114
1115 /*********************************************************************
1116  *
1117  *      EditWndProc   (USER32.@)
1118  */
1119 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
1120 {
1121     if (!IsWindow( hWnd )) return 0;
1122     return EditWndProc_common(hWnd, uMsg, wParam, lParam, FALSE);
1123 }
1124
1125 /*********************************************************************
1126  *
1127  *      EDIT_BuildLineDefs_ML
1128  *
1129  *      Build linked list of text lines.
1130  *      Lines can end with '\0' (last line), a character (if it is wrapped),
1131  *      a soft return '\r\r\n' or a hard return '\r\n'
1132  *
1133  */
1134 static void EDIT_BuildLineDefs_ML(HWND hwnd, EDITSTATE *es, INT istart, INT iend, INT delta, HRGN hrgn)
1135 {
1136         HDC dc;
1137         HFONT old_font = 0;
1138         LPWSTR current_position, cp;
1139         INT fw;
1140         LINEDEF *current_line;
1141         LINEDEF *previous_line;
1142         LINEDEF *start_line;
1143         INT line_index = 0, nstart_line = 0, nstart_index = 0;
1144         INT line_count = es->line_count;
1145         INT orig_net_length;
1146         RECT rc;
1147
1148         if (istart == iend && delta == 0)
1149                 return;
1150
1151         dc = GetDC(hwnd);
1152         if (es->font)
1153                 old_font = SelectObject(dc, es->font);
1154
1155         previous_line = NULL;
1156         current_line = es->first_line_def;
1157
1158         /* Find starting line. istart must lie inside an existing line or
1159          * at the end of buffer */
1160         do {
1161                 if (istart < current_line->index + current_line->length ||
1162                                 current_line->ending == END_0)
1163                         break;
1164
1165                 previous_line = current_line;
1166                 current_line = current_line->next;
1167                 line_index++;
1168         } while (current_line);
1169
1170         if (!current_line) /* Error occurred start is not inside previous buffer */
1171         {
1172                 FIXME(" modification occurred outside buffer\n");
1173                 return;
1174         }
1175
1176         /* Remember start of modifications in order to calculate update region */
1177         nstart_line = line_index;
1178         nstart_index = current_line->index;
1179
1180         /* We must start to reformat from the previous line since the modifications
1181          * may have caused the line to wrap upwards. */
1182         if (!(es->style & ES_AUTOHSCROLL) && line_index > 0)
1183         {
1184                 line_index--;
1185                 current_line = previous_line;
1186         }
1187         start_line = current_line;
1188
1189         fw = es->format_rect.right - es->format_rect.left;
1190         current_position = es->text + current_line->index;
1191         do {
1192                 if (current_line != start_line)
1193                 {
1194                         if (!current_line || current_line->index + delta > current_position - es->text)
1195                         {
1196                                 /* The buffer has been expanded, create a new line and
1197                                    insert it into the link list */
1198                                 LINEDEF *new_line = HeapAlloc(GetProcessHeap(), 0, sizeof(LINEDEF));
1199                                 new_line->next = previous_line->next;
1200                                 previous_line->next = new_line;
1201                                 current_line = new_line;
1202                                 es->line_count++;
1203                         }
1204                         else if (current_line->index + delta < current_position - es->text)
1205                         {
1206                                 /* The previous line merged with this line so we delete this extra entry */
1207                                 previous_line->next = current_line->next;
1208                                 HeapFree(GetProcessHeap(), 0, current_line);
1209                                 current_line = previous_line->next;
1210                                 es->line_count--;
1211                                 continue;
1212                         }
1213                         else /* current_line->index + delta == current_position */
1214                         {
1215                                 if (current_position - es->text > iend)
1216                                         break; /* We reached end of line modifications */
1217                                 /* else recalulate this line */
1218                         }
1219                 }
1220
1221                 current_line->index = current_position - es->text;
1222                 orig_net_length = current_line->net_length;
1223
1224                 /* Find end of line */
1225                 cp = current_position;
1226                 while (*cp) {
1227                         if ((*cp == '\r') && (*(cp + 1) == '\n'))
1228                                 break;
1229                         cp++;
1230                 }
1231
1232                 /* Mark type of line termination */
1233                 if (!(*cp)) {
1234                         current_line->ending = END_0;
1235                         current_line->net_length = strlenW(current_position);
1236                 } else if ((cp > current_position) && (*(cp - 1) == '\r')) {
1237                         current_line->ending = END_SOFT;
1238                         current_line->net_length = cp - current_position - 1;
1239                 } else {
1240                         current_line->ending = END_HARD;
1241                         current_line->net_length = cp - current_position;
1242                 }
1243
1244                 /* Calculate line width */
1245                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1246                                         current_position, current_line->net_length,
1247                                         es->tabs_count, es->tabs));
1248
1249                 /* FIXME: check here for lines that are too wide even in AUTOHSCROLL (> 32767 ???) */
1250                 if ((!(es->style & ES_AUTOHSCROLL)) && (current_line->width > fw)) {
1251                         INT next = 0;
1252                         INT prev;
1253                         do {
1254                                 prev = next;
1255                                 next = EDIT_CallWordBreakProc(es, current_position - es->text,
1256                                                 prev + 1, current_line->net_length, WB_RIGHT);
1257                                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1258                                                         current_position, next, es->tabs_count, es->tabs));
1259                         } while (current_line->width <= fw);
1260                         if (!prev) { /* Didn't find a line break so force a break */
1261                                 next = 0;
1262                                 do {
1263                                         prev = next;
1264                                         next++;
1265                                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1266                                                                 current_position, next, es->tabs_count, es->tabs));
1267                                 } while (current_line->width <= fw);
1268                                 if (!prev)
1269                                         prev = 1;
1270                         }
1271
1272                         /* If the first line we are calculating, wrapped before istart, we must
1273                          * adjust istart in order for this to be reflected in the update region. */
1274                         if (current_line->index == nstart_index && istart > current_line->index + prev)
1275                                 istart = current_line->index + prev;
1276                         /* else if we are updating the previous line before the first line we
1277                          * are re-calculating and it expanded */
1278                         else if (current_line == start_line &&
1279                                         current_line->index != nstart_index && orig_net_length < prev)
1280                         {
1281                           /* Line expanded due to an upwards line wrap so we must partially include
1282                            * previous line in update region */
1283                                 nstart_line = line_index;
1284                                 nstart_index = current_line->index;
1285                                 istart = current_line->index + orig_net_length;
1286                         }
1287
1288                         current_line->net_length = prev;
1289                         current_line->ending = END_WRAP;
1290                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc, current_position,
1291                                         current_line->net_length, es->tabs_count, es->tabs));
1292                 }
1293
1294
1295                 /* Adjust length to include line termination */
1296                 switch (current_line->ending) {
1297                 case END_SOFT:
1298                         current_line->length = current_line->net_length + 3;
1299                         break;
1300                 case END_HARD:
1301                         current_line->length = current_line->net_length + 2;
1302                         break;
1303                 case END_WRAP:
1304                 case END_0:
1305                         current_line->length = current_line->net_length;
1306                         break;
1307                 }
1308                 es->text_width = max(es->text_width, current_line->width);
1309                 current_position += current_line->length;
1310                 previous_line = current_line;
1311                 current_line = current_line->next;
1312                 line_index++;
1313         } while (previous_line->ending != END_0);
1314
1315         /* Finish adjusting line indexes by delta or remove hanging lines */
1316         if (previous_line->ending == END_0)
1317         {
1318                 LINEDEF *pnext = NULL;
1319
1320                 previous_line->next = NULL;
1321                 while (current_line)
1322                 {
1323                         pnext = current_line->next;
1324                         HeapFree(GetProcessHeap(), 0, current_line);
1325                         current_line = pnext;
1326                         es->line_count--;
1327                 }
1328         }
1329         else
1330         {
1331                 while (current_line)
1332                 {
1333                         current_line->index += delta;
1334                         current_line = current_line->next;
1335                 }
1336         }
1337
1338         /* Calculate rest of modification rectangle */
1339         if (hrgn)
1340         {
1341                 HRGN tmphrgn;
1342            /*
1343                 * We calculate two rectangles. One for the first line which may have
1344                 * an indent with respect to the format rect. The other is a format-width
1345                 * rectangle that spans the rest of the lines that changed or moved.
1346                 */
1347                 rc.top = es->format_rect.top + nstart_line * es->line_height -
1348                         (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1349                 rc.bottom = rc.top + es->line_height;
1350                 rc.left = es->format_rect.left + (INT)LOWORD(GetTabbedTextExtentW(dc,
1351                                         es->text + nstart_index, istart - nstart_index,
1352                                         es->tabs_count, es->tabs)) - es->x_offset; /* Adjust for horz scroll */
1353                 rc.right = es->format_rect.right;
1354                 SetRectRgn(hrgn, rc.left, rc.top, rc.right, rc.bottom);
1355
1356                 rc.top = rc.bottom;
1357                 rc.left = es->format_rect.left;
1358                 rc.right = es->format_rect.right;
1359            /*
1360                 * If lines were added or removed we must re-paint the remainder of the
1361             * lines since the remaining lines were either shifted up or down.
1362                 */
1363                 if (line_count < es->line_count) /* We added lines */
1364                         rc.bottom = es->line_count * es->line_height;
1365                 else if (line_count > es->line_count) /* We removed lines */
1366                         rc.bottom = line_count * es->line_height;
1367                 else
1368                         rc.bottom = line_index * es->line_height;
1369                 rc.bottom -= (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1370                 tmphrgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
1371                 CombineRgn(hrgn, hrgn, tmphrgn, RGN_OR);
1372                 DeleteObject(tmphrgn);
1373         }
1374
1375         if (es->font)
1376                 SelectObject(dc, old_font);
1377
1378         ReleaseDC(hwnd, dc);
1379 }
1380
1381 /*********************************************************************
1382  *
1383  *      EDIT_CalcLineWidth_SL
1384  *
1385  */
1386 static void EDIT_CalcLineWidth_SL(HWND hwnd, EDITSTATE *es)
1387 {
1388     es->text_width = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, strlenW(es->text), FALSE));
1389 }
1390
1391 /*********************************************************************
1392  *
1393  *      EDIT_CallWordBreakProc
1394  *
1395  *      Call appropriate WordBreakProc (internal or external).
1396  *
1397  *      Note: The "start" argument should always be an index referring
1398  *              to es->text.  The actual wordbreak proc might be
1399  *              16 bit, so we can't always pass any 32 bit LPSTR.
1400  *              Hence we assume that es->text is the buffer that holds
1401  *              the string under examination (we can decide this for ourselves).
1402  *
1403  */
1404 /* ### start build ### */
1405 extern WORD CALLBACK EDIT_CallTo16_word_lwww(EDITWORDBREAKPROC16,SEGPTR,WORD,WORD,WORD);
1406 /* ### stop build ### */
1407 static INT EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action)
1408 {
1409     INT ret, iWndsLocks;
1410
1411     /* To avoid any deadlocks, all the locks on the window structures
1412        must be suspended before the control is passed to the application */
1413     iWndsLocks = WIN_SuspendWndsLock();
1414
1415         if (es->word_break_proc16) {
1416             HGLOBAL16 hglob16;
1417             SEGPTR segptr;
1418             INT countA;
1419
1420             countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1421             hglob16 = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT, countA);
1422             segptr = K32WOWGlobalLock16(hglob16);
1423             WideCharToMultiByte(CP_ACP, 0, es->text + start, count, MapSL(segptr), countA, NULL, NULL);
1424             ret = (INT)EDIT_CallTo16_word_lwww(es->word_break_proc16,
1425                                                 segptr, index, countA, action);
1426             GlobalUnlock16(hglob16);
1427             GlobalFree16(hglob16);
1428         }
1429         else if (es->word_break_proc)
1430         {
1431             if(es->is_unicode)
1432             {
1433                 EDITWORDBREAKPROCW wbpW = (EDITWORDBREAKPROCW)es->word_break_proc;
1434
1435                 TRACE_(relay)("(UNICODE wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1436                         es->word_break_proc, debugstr_wn(es->text + start, count), index, count, action);
1437                 ret = wbpW(es->text + start, index, count, action);
1438             }
1439             else
1440             {
1441                 EDITWORDBREAKPROCA wbpA = (EDITWORDBREAKPROCA)es->word_break_proc;
1442                 INT countA;
1443                 CHAR *textA;
1444
1445                 countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1446                 textA = HeapAlloc(GetProcessHeap(), 0, countA);
1447                 WideCharToMultiByte(CP_ACP, 0, es->text + start, count, textA, countA, NULL, NULL);
1448                 TRACE_(relay)("(ANSI wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1449                         es->word_break_proc, debugstr_an(textA, countA), index, countA, action);
1450                 ret = wbpA(textA, index, countA, action);
1451                 HeapFree(GetProcessHeap(), 0, textA);
1452             }
1453         }
1454         else
1455             ret = EDIT_WordBreakProc(es->text + start, index, count, action);
1456
1457     WIN_RestoreWndsLock(iWndsLocks);
1458     return ret;
1459 }
1460
1461
1462 /*********************************************************************
1463  *
1464  *      EDIT_CharFromPos
1465  *
1466  *      Beware: This is not the function called on EM_CHARFROMPOS
1467  *              The position _can_ be outside the formatting / client
1468  *              rectangle
1469  *              The return value is only the character index
1470  *
1471  */
1472 static INT EDIT_CharFromPos(HWND hwnd, EDITSTATE *es, INT x, INT y, LPBOOL after_wrap)
1473 {
1474         INT index;
1475         HDC dc;
1476         HFONT old_font = 0;
1477
1478         if (es->style & ES_MULTILINE) {
1479                 INT line = (y - es->format_rect.top) / es->line_height + es->y_offset;
1480                 INT line_index = 0;
1481                 LINEDEF *line_def = es->first_line_def;
1482                 INT low, high;
1483                 while ((line > 0) && line_def->next) {
1484                         line_index += line_def->length;
1485                         line_def = line_def->next;
1486                         line--;
1487                 }
1488                 x += es->x_offset - es->format_rect.left;
1489                 if (x >= line_def->width) {
1490                         if (after_wrap)
1491                                 *after_wrap = (line_def->ending == END_WRAP);
1492                         return line_index + line_def->net_length;
1493                 }
1494                 if (x <= 0) {
1495                         if (after_wrap)
1496                                 *after_wrap = FALSE;
1497                         return line_index;
1498                 }
1499                 dc = GetDC(hwnd);
1500                 if (es->font)
1501                         old_font = SelectObject(dc, es->font);
1502                     low = line_index + 1;
1503                     high = line_index + line_def->net_length + 1;
1504                     while (low < high - 1)
1505                     {
1506                         INT mid = (low + high) / 2;
1507                         if (LOWORD(GetTabbedTextExtentW(dc, es->text + line_index,mid - line_index, es->tabs_count, es->tabs)) > x) high = mid;
1508                         else low = mid;
1509                     }
1510                     index = low;
1511
1512                 if (after_wrap)
1513                         *after_wrap = ((index == line_index + line_def->net_length) &&
1514                                                         (line_def->ending == END_WRAP));
1515         } else {
1516                 LPWSTR text;
1517                 SIZE size;
1518                 if (after_wrap)
1519                         *after_wrap = FALSE;
1520                 x -= es->format_rect.left;
1521                 if (!x)
1522                         return es->x_offset;
1523                 text = EDIT_GetPasswordPointer_SL(es);
1524                 dc = GetDC(hwnd);
1525                 if (es->font)
1526                         old_font = SelectObject(dc, es->font);
1527                 if (x < 0)
1528                 {
1529                     INT low = 0;
1530                     INT high = es->x_offset;
1531                     while (low < high - 1)
1532                     {
1533                         INT mid = (low + high) / 2;
1534                         GetTextExtentPoint32W( dc, text + mid,
1535                                                es->x_offset - mid, &size );
1536                         if (size.cx > -x) low = mid;
1537                         else high = mid;
1538                     }
1539                     index = low;
1540                 }
1541                 else
1542                 {
1543                     INT low = es->x_offset;
1544                     INT high = strlenW(es->text) + 1;
1545                     while (low < high - 1)
1546                     {
1547                         INT mid = (low + high) / 2;
1548                         GetTextExtentPoint32W( dc, text + es->x_offset,
1549                                                mid - es->x_offset, &size );
1550                         if (size.cx > x) high = mid;
1551                         else low = mid;
1552                     }
1553                     index = low;
1554                 }
1555                 if (es->style & ES_PASSWORD)
1556                         HeapFree(GetProcessHeap(), 0, text);
1557         }
1558         if (es->font)
1559                 SelectObject(dc, old_font);
1560         ReleaseDC(hwnd, dc);
1561         return index;
1562 }
1563
1564
1565 /*********************************************************************
1566  *
1567  *      EDIT_ConfinePoint
1568  *
1569  *      adjusts the point to be within the formatting rectangle
1570  *      (so CharFromPos returns the nearest _visible_ character)
1571  *
1572  */
1573 static void EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y)
1574 {
1575         *x = min(max(*x, es->format_rect.left), es->format_rect.right - 1);
1576         *y = min(max(*y, es->format_rect.top), es->format_rect.bottom - 1);
1577 }
1578
1579
1580 /*********************************************************************
1581  *
1582  *      EDIT_GetLineRect
1583  *
1584  *      Calculates the bounding rectangle for a line from a starting
1585  *      column to an ending column.
1586  *
1587  */
1588 static void EDIT_GetLineRect(HWND hwnd, EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc)
1589 {
1590         INT line_index =  EDIT_EM_LineIndex(es, line);
1591
1592         if (es->style & ES_MULTILINE)
1593                 rc->top = es->format_rect.top + (line - es->y_offset) * es->line_height;
1594         else
1595                 rc->top = es->format_rect.top;
1596         rc->bottom = rc->top + es->line_height;
1597         rc->left = (scol == 0) ? es->format_rect.left : SLOWORD(EDIT_EM_PosFromChar(hwnd, es, line_index + scol, TRUE));
1598         rc->right = (ecol == -1) ? es->format_rect.right : SLOWORD(EDIT_EM_PosFromChar(hwnd, es, line_index + ecol, TRUE));
1599 }
1600
1601
1602 /*********************************************************************
1603  *
1604  *      EDIT_GetPasswordPointer_SL
1605  *
1606  *      note: caller should free the (optionally) allocated buffer
1607  *
1608  */
1609 static LPWSTR EDIT_GetPasswordPointer_SL(EDITSTATE *es)
1610 {
1611         if (es->style & ES_PASSWORD) {
1612                 INT len = strlenW(es->text);
1613                 LPWSTR text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
1614                 text[len] = '\0';
1615                 while(len) text[--len] = es->password_char;
1616                 return text;
1617         } else
1618                 return es->text;
1619 }
1620
1621
1622 /*********************************************************************
1623  *
1624  *      EDIT_LockBuffer
1625  *
1626  *      This acts as a LOCAL_Lock(), but it locks only once.  This way
1627  *      you can call it whenever you like, without unlocking.
1628  *
1629  */
1630 static void EDIT_LockBuffer(HWND hwnd, EDITSTATE *es)
1631 {
1632     HINSTANCE hInstance = GetWindowLongA( hwnd, GWL_HINSTANCE );
1633         if (!es) {
1634                 ERR("no EDITSTATE ... please report\n");
1635                 return;
1636         }
1637         if (!es->text) {
1638             CHAR *textA = NULL;
1639             UINT countA = 0;
1640             BOOL _16bit = FALSE;
1641
1642             if(es->hloc32W)
1643             {
1644                 if(es->hloc32A)
1645                 {
1646                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
1647                     textA = LocalLock(es->hloc32A);
1648                     countA = strlen(textA) + 1;
1649                 }
1650                 else if(es->hloc16)
1651                 {
1652                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
1653                     textA = LOCAL_Lock(hInstance, es->hloc16);
1654                     countA = strlen(textA) + 1;
1655                     _16bit = TRUE;
1656                 }
1657             }
1658             else {
1659                 ERR("no buffer ... please report\n");
1660                 return;
1661             }
1662
1663             if(textA)
1664             {
1665                 HLOCAL hloc32W_new;
1666                 UINT countW_new = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
1667                 TRACE("%d bytes translated to %d WCHARs\n", countA, countW_new);
1668                 if(countW_new > es->buffer_size + 1)
1669                 {
1670                     UINT alloc_size = ROUND_TO_GROW(countW_new * sizeof(WCHAR));
1671                     TRACE("Resizing 32-bit UNICODE buffer from %d+1 to %d WCHARs\n", es->buffer_size, countW_new);
1672                     hloc32W_new = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
1673                     if(hloc32W_new)
1674                     {
1675                         es->hloc32W = hloc32W_new;
1676                         es->buffer_size = LocalSize(hloc32W_new)/sizeof(WCHAR) - 1;
1677                         TRACE("Real new size %d+1 WCHARs\n", es->buffer_size);
1678                     }
1679                     else
1680                         WARN("FAILED! Will synchronize partially\n");
1681                 }
1682             }
1683
1684             /*TRACE("Locking 32-bit UNICODE buffer\n");*/
1685             es->text = LocalLock(es->hloc32W);
1686
1687             if(textA)
1688             {
1689                 MultiByteToWideChar(CP_ACP, 0, textA, countA, es->text, es->buffer_size + 1);
1690                 if(_16bit)
1691                     LOCAL_Unlock(hInstance, es->hloc16);
1692                 else
1693                     LocalUnlock(es->hloc32A);
1694             }
1695         }
1696         es->lock_count++;
1697 }
1698
1699
1700 /*********************************************************************
1701  *
1702  *      EDIT_SL_InvalidateText
1703  *
1704  *      Called from EDIT_InvalidateText().
1705  *      Does the job for single-line controls only.
1706  *
1707  */
1708 static void EDIT_SL_InvalidateText(HWND hwnd, EDITSTATE *es, INT start, INT end)
1709 {
1710         RECT line_rect;
1711         RECT rc;
1712
1713         EDIT_GetLineRect(hwnd, es, 0, start, end, &line_rect);
1714         if (IntersectRect(&rc, &line_rect, &es->format_rect))
1715                 EDIT_UpdateText(hwnd, es, &rc, FALSE);
1716 }
1717
1718
1719 /*********************************************************************
1720  *
1721  *      EDIT_ML_InvalidateText
1722  *
1723  *      Called from EDIT_InvalidateText().
1724  *      Does the job for multi-line controls only.
1725  *
1726  */
1727 static void EDIT_ML_InvalidateText(HWND hwnd, EDITSTATE *es, INT start, INT end)
1728 {
1729         INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
1730         INT sl = EDIT_EM_LineFromChar(es, start);
1731         INT el = EDIT_EM_LineFromChar(es, end);
1732         INT sc;
1733         INT ec;
1734         RECT rc1;
1735         RECT rcWnd;
1736         RECT rcLine;
1737         RECT rcUpdate;
1738         INT l;
1739
1740         if ((el < es->y_offset) || (sl > es->y_offset + vlc))
1741                 return;
1742
1743         sc = start - EDIT_EM_LineIndex(es, sl);
1744         ec = end - EDIT_EM_LineIndex(es, el);
1745         if (sl < es->y_offset) {
1746                 sl = es->y_offset;
1747                 sc = 0;
1748         }
1749         if (el > es->y_offset + vlc) {
1750                 el = es->y_offset + vlc;
1751                 ec = EDIT_EM_LineLength(es, EDIT_EM_LineIndex(es, el));
1752         }
1753         GetClientRect(hwnd, &rc1);
1754         IntersectRect(&rcWnd, &rc1, &es->format_rect);
1755         if (sl == el) {
1756                 EDIT_GetLineRect(hwnd, es, sl, sc, ec, &rcLine);
1757                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1758                         EDIT_UpdateText(hwnd, es, &rcUpdate, FALSE);
1759         } else {
1760                 EDIT_GetLineRect(hwnd, es, sl, sc,
1761                                 EDIT_EM_LineLength(es,
1762                                         EDIT_EM_LineIndex(es, sl)),
1763                                 &rcLine);
1764                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1765                         EDIT_UpdateText(hwnd, es, &rcUpdate, FALSE);
1766                 for (l = sl + 1 ; l < el ; l++) {
1767                         EDIT_GetLineRect(hwnd, es, l, 0,
1768                                 EDIT_EM_LineLength(es,
1769                                         EDIT_EM_LineIndex(es, l)),
1770                                 &rcLine);
1771                         if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1772                                 EDIT_UpdateText(hwnd, es, &rcUpdate, FALSE);
1773                 }
1774                 EDIT_GetLineRect(hwnd, es, el, 0, ec, &rcLine);
1775                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1776                         EDIT_UpdateText(hwnd, es, &rcUpdate, FALSE);
1777         }
1778 }
1779
1780
1781 /*********************************************************************
1782  *
1783  *      EDIT_InvalidateText
1784  *
1785  *      Invalidate the text from offset start upto, but not including,
1786  *      offset end.  Useful for (re)painting the selection.
1787  *      Regions outside the linewidth are not invalidated.
1788  *      end == -1 means end == TextLength.
1789  *      start and end need not be ordered.
1790  *
1791  */
1792 static void EDIT_InvalidateText(HWND hwnd, EDITSTATE *es, INT start, INT end)
1793 {
1794         if (end == start)
1795                 return;
1796
1797         if (end == -1)
1798                 end = strlenW(es->text);
1799
1800         ORDER_INT(start, end);
1801
1802         if (es->style & ES_MULTILINE)
1803                 EDIT_ML_InvalidateText(hwnd, es, start, end);
1804         else
1805                 EDIT_SL_InvalidateText(hwnd, es, start, end);
1806 }
1807
1808
1809 /*********************************************************************
1810  *
1811  *      EDIT_MakeFit
1812  *
1813  *      Try to fit size + 1 characters in the buffer. Constrain to limits.
1814  *
1815  */
1816 static BOOL EDIT_MakeFit(HWND hwnd, EDITSTATE *es, UINT size)
1817 {
1818         HLOCAL hNew32W;
1819
1820         if (size <= es->buffer_size)
1821                 return TRUE;
1822         if (size > es->buffer_limit) {
1823                 EDIT_NOTIFY_PARENT(hwnd, es, EN_MAXTEXT, "EN_MAXTEXT");
1824                 return FALSE;
1825         }
1826         if (size > es->buffer_limit)
1827                 size = es->buffer_limit;
1828
1829         TRACE("trying to ReAlloc to %d+1 characters\n", size);
1830
1831         /* Force edit to unlock it's buffer. es->text now NULL */
1832         EDIT_UnlockBuffer(hwnd, es, TRUE);
1833
1834         if (es->hloc32W) {
1835             UINT alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1836             if ((hNew32W = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT))) {
1837                 TRACE("Old 32 bit handle %08x, new handle %08x\n", es->hloc32W, hNew32W);
1838                 es->hloc32W = hNew32W;
1839                 es->buffer_size = LocalSize(hNew32W)/sizeof(WCHAR) - 1;
1840             }
1841         }
1842
1843         EDIT_LockBuffer(hwnd, es);
1844
1845         if (es->buffer_size < size) {
1846                 WARN("FAILED !  We now have %d+1\n", es->buffer_size);
1847                 EDIT_NOTIFY_PARENT(hwnd, es, EN_ERRSPACE, "EN_ERRSPACE");
1848                 return FALSE;
1849         } else {
1850                 TRACE("We now have %d+1\n", es->buffer_size);
1851                 return TRUE;
1852         }
1853 }
1854
1855
1856 /*********************************************************************
1857  *
1858  *      EDIT_MakeUndoFit
1859  *
1860  *      Try to fit size + 1 bytes in the undo buffer.
1861  *
1862  */
1863 static BOOL EDIT_MakeUndoFit(EDITSTATE *es, UINT size)
1864 {
1865         UINT alloc_size;
1866
1867         if (size <= es->undo_buffer_size)
1868                 return TRUE;
1869
1870         TRACE("trying to ReAlloc to %d+1\n", size);
1871
1872         alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1873         if ((es->undo_text = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, es->undo_text, alloc_size))) {
1874                 es->undo_buffer_size = alloc_size/sizeof(WCHAR);
1875                 return TRUE;
1876         }
1877         else
1878         {
1879                 WARN("FAILED !  We now have %d+1\n", es->undo_buffer_size);
1880                 return FALSE;
1881         }
1882 }
1883
1884
1885 /*********************************************************************
1886  *
1887  *      EDIT_MoveBackward
1888  *
1889  */
1890 static void EDIT_MoveBackward(HWND hwnd, EDITSTATE *es, BOOL extend)
1891 {
1892         INT e = es->selection_end;
1893
1894         if (e) {
1895                 e--;
1896                 if ((es->style & ES_MULTILINE) && e &&
1897                                 (es->text[e - 1] == '\r') && (es->text[e] == '\n')) {
1898                         e--;
1899                         if (e && (es->text[e - 1] == '\r'))
1900                                 e--;
1901                 }
1902         }
1903         EDIT_EM_SetSel(hwnd, es, extend ? es->selection_start : e, e, FALSE);
1904         EDIT_EM_ScrollCaret(hwnd, es);
1905 }
1906
1907
1908 /*********************************************************************
1909  *
1910  *      EDIT_MoveDown_ML
1911  *
1912  *      Only for multi line controls
1913  *      Move the caret one line down, on a column with the nearest
1914  *      x coordinate on the screen (might be a different column).
1915  *
1916  */
1917 static void EDIT_MoveDown_ML(HWND hwnd, EDITSTATE *es, BOOL extend)
1918 {
1919         INT s = es->selection_start;
1920         INT e = es->selection_end;
1921         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1922         LRESULT pos = EDIT_EM_PosFromChar(hwnd, es, e, after_wrap);
1923         INT x = SLOWORD(pos);
1924         INT y = SHIWORD(pos);
1925
1926         e = EDIT_CharFromPos(hwnd, es, x, y + es->line_height, &after_wrap);
1927         if (!extend)
1928                 s = e;
1929         EDIT_EM_SetSel(hwnd, es, s, e, after_wrap);
1930         EDIT_EM_ScrollCaret(hwnd, es);
1931 }
1932
1933
1934 /*********************************************************************
1935  *
1936  *      EDIT_MoveEnd
1937  *
1938  */
1939 static void EDIT_MoveEnd(HWND hwnd, EDITSTATE *es, BOOL extend)
1940 {
1941         BOOL after_wrap = FALSE;
1942         INT e;
1943
1944         /* Pass a high value in x to make sure of receiving the end of the line */
1945         if (es->style & ES_MULTILINE)
1946                 e = EDIT_CharFromPos(hwnd, es, 0x3fffffff,
1947                         HIWORD(EDIT_EM_PosFromChar(hwnd, es, es->selection_end, es->flags & EF_AFTER_WRAP)), &after_wrap);
1948         else
1949                 e = strlenW(es->text);
1950         EDIT_EM_SetSel(hwnd, es, extend ? es->selection_start : e, e, after_wrap);
1951         EDIT_EM_ScrollCaret(hwnd, es);
1952 }
1953
1954
1955 /*********************************************************************
1956  *
1957  *      EDIT_MoveForward
1958  *
1959  */
1960 static void EDIT_MoveForward(HWND hwnd, EDITSTATE *es, BOOL extend)
1961 {
1962         INT e = es->selection_end;
1963
1964         if (es->text[e]) {
1965                 e++;
1966                 if ((es->style & ES_MULTILINE) && (es->text[e - 1] == '\r')) {
1967                         if (es->text[e] == '\n')
1968                                 e++;
1969                         else if ((es->text[e] == '\r') && (es->text[e + 1] == '\n'))
1970                                 e += 2;
1971                 }
1972         }
1973         EDIT_EM_SetSel(hwnd, es, extend ? es->selection_start : e, e, FALSE);
1974         EDIT_EM_ScrollCaret(hwnd, es);
1975 }
1976
1977
1978 /*********************************************************************
1979  *
1980  *      EDIT_MoveHome
1981  *
1982  *      Home key: move to beginning of line.
1983  *
1984  */
1985 static void EDIT_MoveHome(HWND hwnd, EDITSTATE *es, BOOL extend)
1986 {
1987         INT e;
1988
1989         /* Pass the x_offset in x to make sure of receiving the first position of the line */
1990         if (es->style & ES_MULTILINE)
1991                 e = EDIT_CharFromPos(hwnd, es, -es->x_offset,
1992                         HIWORD(EDIT_EM_PosFromChar(hwnd, es, es->selection_end, es->flags & EF_AFTER_WRAP)), NULL);
1993         else
1994                 e = 0;
1995         EDIT_EM_SetSel(hwnd, es, extend ? es->selection_start : e, e, FALSE);
1996         EDIT_EM_ScrollCaret(hwnd, es);
1997 }
1998
1999
2000 /*********************************************************************
2001  *
2002  *      EDIT_MovePageDown_ML
2003  *
2004  *      Only for multi line controls
2005  *      Move the caret one page down, on a column with the nearest
2006  *      x coordinate on the screen (might be a different column).
2007  *
2008  */
2009 static void EDIT_MovePageDown_ML(HWND hwnd, EDITSTATE *es, BOOL extend)
2010 {
2011         INT s = es->selection_start;
2012         INT e = es->selection_end;
2013         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
2014         LRESULT pos = EDIT_EM_PosFromChar(hwnd, es, e, after_wrap);
2015         INT x = SLOWORD(pos);
2016         INT y = SHIWORD(pos);
2017
2018         e = EDIT_CharFromPos(hwnd, es, x,
2019                 y + (es->format_rect.bottom - es->format_rect.top),
2020                 &after_wrap);
2021         if (!extend)
2022                 s = e;
2023         EDIT_EM_SetSel(hwnd, es, s, e, after_wrap);
2024         EDIT_EM_ScrollCaret(hwnd, es);
2025 }
2026
2027
2028 /*********************************************************************
2029  *
2030  *      EDIT_MovePageUp_ML
2031  *
2032  *      Only for multi line controls
2033  *      Move the caret one page up, on a column with the nearest
2034  *      x coordinate on the screen (might be a different column).
2035  *
2036  */
2037 static void EDIT_MovePageUp_ML(HWND hwnd, EDITSTATE *es, BOOL extend)
2038 {
2039         INT s = es->selection_start;
2040         INT e = es->selection_end;
2041         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
2042         LRESULT pos = EDIT_EM_PosFromChar(hwnd, es, e, after_wrap);
2043         INT x = SLOWORD(pos);
2044         INT y = SHIWORD(pos);
2045
2046         e = EDIT_CharFromPos(hwnd, es, x,
2047                 y - (es->format_rect.bottom - es->format_rect.top),
2048                 &after_wrap);
2049         if (!extend)
2050                 s = e;
2051         EDIT_EM_SetSel(hwnd, es, s, e, after_wrap);
2052         EDIT_EM_ScrollCaret(hwnd, es);
2053 }
2054
2055
2056 /*********************************************************************
2057  *
2058  *      EDIT_MoveUp_ML
2059  *
2060  *      Only for multi line controls
2061  *      Move the caret one line up, on a column with the nearest
2062  *      x coordinate on the screen (might be a different column).
2063  *
2064  */
2065 static void EDIT_MoveUp_ML(HWND hwnd, EDITSTATE *es, BOOL extend)
2066 {
2067         INT s = es->selection_start;
2068         INT e = es->selection_end;
2069         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
2070         LRESULT pos = EDIT_EM_PosFromChar(hwnd, es, e, after_wrap);
2071         INT x = SLOWORD(pos);
2072         INT y = SHIWORD(pos);
2073
2074         e = EDIT_CharFromPos(hwnd, es, x, y - es->line_height, &after_wrap);
2075         if (!extend)
2076                 s = e;
2077         EDIT_EM_SetSel(hwnd, es, s, e, after_wrap);
2078         EDIT_EM_ScrollCaret(hwnd, es);
2079 }
2080
2081
2082 /*********************************************************************
2083  *
2084  *      EDIT_MoveWordBackward
2085  *
2086  */
2087 static void EDIT_MoveWordBackward(HWND hwnd, EDITSTATE *es, BOOL extend)
2088 {
2089         INT s = es->selection_start;
2090         INT e = es->selection_end;
2091         INT l;
2092         INT ll;
2093         INT li;
2094
2095         l = EDIT_EM_LineFromChar(es, e);
2096         ll = EDIT_EM_LineLength(es, e);
2097         li = EDIT_EM_LineIndex(es, l);
2098         if (e - li == 0) {
2099                 if (l) {
2100                         li = EDIT_EM_LineIndex(es, l - 1);
2101                         e = li + EDIT_EM_LineLength(es, li);
2102                 }
2103         } else {
2104                 e = li + (INT)EDIT_CallWordBreakProc(es,
2105                                 li, e - li, ll, WB_LEFT);
2106         }
2107         if (!extend)
2108                 s = e;
2109         EDIT_EM_SetSel(hwnd, es, s, e, FALSE);
2110         EDIT_EM_ScrollCaret(hwnd, es);
2111 }
2112
2113
2114 /*********************************************************************
2115  *
2116  *      EDIT_MoveWordForward
2117  *
2118  */
2119 static void EDIT_MoveWordForward(HWND hwnd, EDITSTATE *es, BOOL extend)
2120 {
2121         INT s = es->selection_start;
2122         INT e = es->selection_end;
2123         INT l;
2124         INT ll;
2125         INT li;
2126
2127         l = EDIT_EM_LineFromChar(es, e);
2128         ll = EDIT_EM_LineLength(es, e);
2129         li = EDIT_EM_LineIndex(es, l);
2130         if (e - li == ll) {
2131                 if ((es->style & ES_MULTILINE) && (l != es->line_count - 1))
2132                         e = EDIT_EM_LineIndex(es, l + 1);
2133         } else {
2134                 e = li + EDIT_CallWordBreakProc(es,
2135                                 li, e - li + 1, ll, WB_RIGHT);
2136         }
2137         if (!extend)
2138                 s = e;
2139         EDIT_EM_SetSel(hwnd, es, s, e, FALSE);
2140         EDIT_EM_ScrollCaret(hwnd, es);
2141 }
2142
2143
2144 /*********************************************************************
2145  *
2146  *      EDIT_PaintLine
2147  *
2148  */
2149 static void EDIT_PaintLine(HWND hwnd, EDITSTATE *es, HDC dc, INT line, BOOL rev)
2150 {
2151         INT s = es->selection_start;
2152         INT e = es->selection_end;
2153         INT li;
2154         INT ll;
2155         INT x;
2156         INT y;
2157         LRESULT pos;
2158
2159         if (es->style & ES_MULTILINE) {
2160                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2161                 if ((line < es->y_offset) || (line > es->y_offset + vlc) || (line >= es->line_count))
2162                         return;
2163         } else if (line)
2164                 return;
2165
2166         TRACE("line=%d\n", line);
2167
2168         pos = EDIT_EM_PosFromChar(hwnd, es, EDIT_EM_LineIndex(es, line), FALSE);
2169         x = SLOWORD(pos);
2170         y = SHIWORD(pos);
2171         li = EDIT_EM_LineIndex(es, line);
2172         ll = EDIT_EM_LineLength(es, li);
2173         s = es->selection_start;
2174         e = es->selection_end;
2175         ORDER_INT(s, e);
2176         s = min(li + ll, max(li, s));
2177         e = min(li + ll, max(li, e));
2178         if (rev && (s != e) &&
2179                         ((es->flags & EF_FOCUSED) || (es->style & ES_NOHIDESEL))) {
2180                 x += EDIT_PaintText(es, dc, x, y, line, 0, s - li, FALSE);
2181                 x += EDIT_PaintText(es, dc, x, y, line, s - li, e - s, TRUE);
2182                 x += EDIT_PaintText(es, dc, x, y, line, e - li, li + ll - e, FALSE);
2183         } else
2184                 x += EDIT_PaintText(es, dc, x, y, line, 0, ll, FALSE);
2185 }
2186
2187
2188 /*********************************************************************
2189  *
2190  *      EDIT_PaintText
2191  *
2192  */
2193 static INT EDIT_PaintText(EDITSTATE *es, HDC dc, INT x, INT y, INT line, INT col, INT count, BOOL rev)
2194 {
2195         COLORREF BkColor;
2196         COLORREF TextColor;
2197         INT ret;
2198         INT li;
2199         INT BkMode;
2200         SIZE size;
2201
2202         if (!count)
2203                 return 0;
2204         BkMode = GetBkMode(dc);
2205         BkColor = GetBkColor(dc);
2206         TextColor = GetTextColor(dc);
2207         if (rev) {
2208                 SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
2209                 SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
2210                 SetBkMode( dc, OPAQUE);
2211         }
2212         li = EDIT_EM_LineIndex(es, line);
2213         if (es->style & ES_MULTILINE) {
2214                 ret = (INT)LOWORD(TabbedTextOutW(dc, x, y, es->text + li + col, count,
2215                                         es->tabs_count, es->tabs, es->format_rect.left - es->x_offset));
2216         } else {
2217                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2218                 TextOutW(dc, x, y, text + li + col, count);
2219                 GetTextExtentPoint32W(dc, text + li + col, count, &size);
2220                 ret = size.cx;
2221                 if (es->style & ES_PASSWORD)
2222                         HeapFree(GetProcessHeap(), 0, text);
2223         }
2224         if (rev) {
2225                 SetBkColor(dc, BkColor);
2226                 SetTextColor(dc, TextColor);
2227                 SetBkMode( dc, BkMode);
2228         }
2229         return ret;
2230 }
2231
2232
2233 /*********************************************************************
2234  *
2235  *      EDIT_SetCaretPos
2236  *
2237  */
2238 static void EDIT_SetCaretPos(HWND hwnd, EDITSTATE *es, INT pos,
2239                              BOOL after_wrap)
2240 {
2241         LRESULT res = EDIT_EM_PosFromChar(hwnd, es, pos, after_wrap);
2242         SetCaretPos(SLOWORD(res), SHIWORD(res));
2243 }
2244
2245
2246 /*********************************************************************
2247  *
2248  *      EDIT_SetRectNP
2249  *
2250  *      note:   this is not (exactly) the handler called on EM_SETRECTNP
2251  *              it is also used to set the rect of a single line control
2252  *
2253  */
2254 static void EDIT_SetRectNP(HWND hwnd, EDITSTATE *es, LPRECT rc)
2255 {
2256         CopyRect(&es->format_rect, rc);
2257         if (es->style & WS_BORDER) {
2258                 INT bw = GetSystemMetrics(SM_CXBORDER) + 1;
2259                 if(TWEAK_WineLook == WIN31_LOOK)
2260                         bw += 2;
2261                 es->format_rect.left += bw;
2262                 es->format_rect.top += bw;
2263                 es->format_rect.right -= bw;
2264                 es->format_rect.bottom -= bw;
2265         }
2266         es->format_rect.left += es->left_margin;
2267         es->format_rect.right -= es->right_margin;
2268         es->format_rect.right = max(es->format_rect.right, es->format_rect.left + es->char_width);
2269         if (es->style & ES_MULTILINE)
2270         {
2271             INT fw, vlc, max_x_offset, max_y_offset;
2272
2273             vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2274             es->format_rect.bottom = es->format_rect.top + max(1, vlc) * es->line_height;
2275
2276             /* correct es->x_offset */
2277             fw = es->format_rect.right - es->format_rect.left;
2278             max_x_offset = es->text_width - fw;
2279             if(max_x_offset < 0) max_x_offset = 0;
2280             if(es->x_offset > max_x_offset)
2281                 es->x_offset = max_x_offset;
2282
2283             /* correct es->y_offset */
2284             max_y_offset = es->line_count - vlc;
2285             if(max_y_offset < 0) max_y_offset = 0;
2286             if(es->y_offset > max_y_offset)
2287                 es->y_offset = max_y_offset;
2288
2289             /* force scroll info update */
2290             EDIT_UpdateScrollInfo(hwnd, es);
2291         }
2292         else
2293         /* Windows doesn't care to fix text placement for SL controls */
2294                 es->format_rect.bottom = es->format_rect.top + es->line_height;
2295
2296         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL))
2297                 EDIT_BuildLineDefs_ML(hwnd, es, 0, strlenW(es->text), 0, (HRGN)0);
2298 }
2299
2300
2301 /*********************************************************************
2302  *
2303  *      EDIT_UnlockBuffer
2304  *
2305  */
2306 static void EDIT_UnlockBuffer(HWND hwnd, EDITSTATE *es, BOOL force)
2307 {
2308     HINSTANCE hInstance = GetWindowLongA( hwnd, GWL_HINSTANCE );
2309
2310     /* Edit window might be already destroyed */
2311     if(!IsWindow(hwnd))
2312     {
2313         WARN("edit hwnd %04x already destroyed\n", hwnd);
2314         return;
2315     }
2316
2317         if (!es) {
2318                 ERR("no EDITSTATE ... please report\n");
2319                 return;
2320         }
2321         if (!es->lock_count) {
2322                 ERR("lock_count == 0 ... please report\n");
2323                 return;
2324         }
2325         if (!es->text) {
2326                 ERR("es->text == 0 ... please report\n");
2327                 return;
2328         }
2329
2330         if (force || (es->lock_count == 1)) {
2331             if (es->hloc32W) {
2332                 CHAR *textA = NULL;
2333                 BOOL _16bit = FALSE;
2334                 UINT countA = 0;
2335                 UINT countW = strlenW(es->text) + 1;
2336
2337                 if(es->hloc32A)
2338                 {
2339                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2340                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
2341                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2342                     countA = LocalSize(es->hloc32A);
2343                     if(countA_new > countA)
2344                     {
2345                         HLOCAL hloc32A_new;
2346                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2347                         TRACE("Resizing 32-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2348                         hloc32A_new = LocalReAlloc(es->hloc32A, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2349                         if(hloc32A_new)
2350                         {
2351                             es->hloc32A = hloc32A_new;
2352                             countA = LocalSize(hloc32A_new);
2353                             TRACE("Real new size %d bytes\n", countA);
2354                         }
2355                         else
2356                             WARN("FAILED! Will synchronize partially\n");
2357                     }
2358                     textA = LocalLock(es->hloc32A);
2359                 }
2360                 else if(es->hloc16)
2361                 {
2362                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2363                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
2364                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2365                     countA = LOCAL_Size(hInstance, es->hloc16);
2366                     if(countA_new > countA)
2367                     {
2368                         HLOCAL16 hloc16_new;
2369                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2370                         TRACE("Resizing 16-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2371                         hloc16_new = LOCAL_ReAlloc(hInstance, es->hloc16, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2372                         if(hloc16_new)
2373                         {
2374                             es->hloc16 = hloc16_new;
2375                             countA = LOCAL_Size(hInstance, hloc16_new);
2376                             TRACE("Real new size %d bytes\n", countA);
2377                         }
2378                         else
2379                             WARN("FAILED! Will synchronize partially\n");
2380                     }
2381                     textA = LOCAL_Lock(hInstance, es->hloc16);
2382                     _16bit = TRUE;
2383                 }
2384
2385                 if(textA)
2386                 {
2387                     WideCharToMultiByte(CP_ACP, 0, es->text, countW, textA, countA, NULL, NULL);
2388                     if(_16bit)
2389                         LOCAL_Unlock(hInstance, es->hloc16);
2390                     else
2391                         LocalUnlock(es->hloc32A);
2392                 }
2393
2394                 LocalUnlock(es->hloc32W);
2395                 es->text = NULL;
2396             }
2397             else {
2398                 ERR("no buffer ... please report\n");
2399                 return;
2400             }
2401         }
2402         es->lock_count--;
2403 }
2404
2405
2406 /*********************************************************************
2407  *
2408  *      EDIT_UpdateScrollInfo
2409  *
2410  */
2411 static void EDIT_UpdateScrollInfo(HWND hwnd, EDITSTATE *es)
2412 {
2413     if ((es->style & WS_VSCROLL) && !(es->flags & EF_VSCROLL_TRACK))
2414     {
2415         SCROLLINFO si;
2416         si.cbSize       = sizeof(SCROLLINFO);
2417         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2418         si.nMin         = 0;
2419         si.nMax         = es->line_count - 1;
2420         si.nPage        = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2421         si.nPos         = es->y_offset;
2422         TRACE("SB_VERT, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2423                 si.nMin, si.nMax, si.nPage, si.nPos);
2424         SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
2425     }
2426
2427     if ((es->style & WS_HSCROLL) && !(es->flags & EF_HSCROLL_TRACK))
2428     {
2429         SCROLLINFO si;
2430         si.cbSize       = sizeof(SCROLLINFO);
2431         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2432         si.nMin         = 0;
2433         si.nMax         = es->text_width - 1;
2434         si.nPage        = es->format_rect.right - es->format_rect.left;
2435         si.nPos         = es->x_offset;
2436         TRACE("SB_HORZ, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2437                 si.nMin, si.nMax, si.nPage, si.nPos);
2438         SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
2439     }
2440 }
2441
2442 /*********************************************************************
2443  *
2444  *      EDIT_WordBreakProc
2445  *
2446  *      Find the beginning of words.
2447  *      Note:   unlike the specs for a WordBreakProc, this function only
2448  *              allows to be called without linebreaks between s[0] upto
2449  *              s[count - 1].  Remember it is only called
2450  *              internally, so we can decide this for ourselves.
2451  *
2452  */
2453 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action)
2454 {
2455         INT ret = 0;
2456
2457         TRACE("s=%p, index=%d, count=%d, action=%d\n", s, index, count, action);
2458
2459         if(!s) return 0;
2460
2461         switch (action) {
2462         case WB_LEFT:
2463                 if (!count)
2464                         break;
2465                 if (index)
2466                         index--;
2467                 if (s[index] == ' ') {
2468                         while (index && (s[index] == ' '))
2469                                 index--;
2470                         if (index) {
2471                                 while (index && (s[index] != ' '))
2472                                         index--;
2473                                 if (s[index] == ' ')
2474                                         index++;
2475                         }
2476                 } else {
2477                         while (index && (s[index] != ' '))
2478                                 index--;
2479                         if (s[index] == ' ')
2480                                 index++;
2481                 }
2482                 ret = index;
2483                 break;
2484         case WB_RIGHT:
2485                 if (!count)
2486                         break;
2487                 if (index)
2488                         index--;
2489                 if (s[index] == ' ')
2490                         while ((index < count) && (s[index] == ' ')) index++;
2491                 else {
2492                         while (s[index] && (s[index] != ' ') && (index < count))
2493                                 index++;
2494                         while ((s[index] == ' ') && (index < count)) index++;
2495                 }
2496                 ret = index;
2497                 break;
2498         case WB_ISDELIMITER:
2499                 ret = (s[index] == ' ');
2500                 break;
2501         default:
2502                 ERR("unknown action code, please report !\n");
2503                 break;
2504         }
2505         return ret;
2506 }
2507
2508
2509 /*********************************************************************
2510  *
2511  *      EM_CHARFROMPOS
2512  *
2513  *      returns line number (not index) in high-order word of result.
2514  *      NB : Q137805 is unclear about this. POINT * pointer in lParam apply
2515  *      to Richedit, not to the edit control. Original documentation is valid.
2516  *      FIXME: do the specs mean to return -1 if outside client area or
2517  *              if outside formatting rectangle ???
2518  *
2519  */
2520 static LRESULT EDIT_EM_CharFromPos(HWND hwnd, EDITSTATE *es, INT x, INT y)
2521 {
2522         POINT pt;
2523         RECT rc;
2524         INT index;
2525
2526         pt.x = x;
2527         pt.y = y;
2528         GetClientRect(hwnd, &rc);
2529         if (!PtInRect(&rc, pt))
2530                 return -1;
2531
2532         index = EDIT_CharFromPos(hwnd, es, x, y, NULL);
2533         return MAKELONG(index, EDIT_EM_LineFromChar(es, index));
2534 }
2535
2536
2537 /*********************************************************************
2538  *
2539  *      EM_FMTLINES
2540  *
2541  * Enable or disable soft breaks.
2542  */
2543 static BOOL EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol)
2544 {
2545         es->flags &= ~EF_USE_SOFTBRK;
2546         if (add_eol) {
2547                 es->flags |= EF_USE_SOFTBRK;
2548                 FIXME("soft break enabled, not implemented\n");
2549         }
2550         return add_eol;
2551 }
2552
2553
2554 /*********************************************************************
2555  *
2556  *      EM_GETHANDLE
2557  *
2558  *      Hopefully this won't fire back at us.
2559  *      We always start with a fixed buffer in the local heap.
2560  *      Despite of the documentation says that the local heap is used
2561  *      only if DS_LOCALEDIT flag is set, NT and 2000 always allocate
2562  *      buffer on the local heap.
2563  *
2564  */
2565 static HLOCAL EDIT_EM_GetHandle(EDITSTATE *es)
2566 {
2567         HLOCAL hLocal;
2568
2569         if (!(es->style & ES_MULTILINE))
2570                 return 0;
2571
2572         if(es->is_unicode)
2573             hLocal = es->hloc32W;
2574         else
2575         {
2576             if(!es->hloc32A)
2577             {
2578                 CHAR *textA;
2579                 UINT countA, alloc_size;
2580                 TRACE("Allocating 32-bit ANSI alias buffer\n");
2581                 countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2582                 alloc_size = ROUND_TO_GROW(countA);
2583                 if(!(es->hloc32A = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
2584                 {
2585                     ERR("Could not allocate %d bytes for 32-bit ANSI alias buffer\n", alloc_size);
2586                     return 0;
2587                 }
2588                 textA = LocalLock(es->hloc32A);
2589                 WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2590                 LocalUnlock(es->hloc32A);
2591             }
2592             hLocal = es->hloc32A;
2593         }
2594
2595         TRACE("Returning %04X, LocalSize() = %d\n", hLocal, LocalSize(hLocal));
2596         return hLocal;
2597 }
2598
2599
2600 /*********************************************************************
2601  *
2602  *      EM_GETHANDLE16
2603  *
2604  *      Hopefully this won't fire back at us.
2605  *      We always start with a buffer in 32 bit linear memory.
2606  *      However, with this message a 16 bit application requests
2607  *      a handle of 16 bit local heap memory, where it expects to find
2608  *      the text.
2609  *      It's a pitty that from this moment on we have to use this
2610  *      local heap, because applications may rely on the handle
2611  *      in the future.
2612  *
2613  *      In this function we'll try to switch to local heap.
2614  */
2615 static HLOCAL16 EDIT_EM_GetHandle16(HWND hwnd, EDITSTATE *es)
2616 {
2617     HINSTANCE hInstance = GetWindowLongA( hwnd, GWL_HINSTANCE );
2618         CHAR *textA;
2619         UINT countA, alloc_size;
2620
2621         if (!(es->style & ES_MULTILINE))
2622                 return 0;
2623
2624         if (es->hloc16)
2625                 return es->hloc16;
2626
2627         if (!LOCAL_HeapSize(hInstance)) {
2628                 if (!LocalInit16(hInstance, 0,
2629                                 GlobalSize16(hInstance))) {
2630                         ERR("could not initialize local heap\n");
2631                         return 0;
2632                 }
2633                 TRACE("local heap initialized\n");
2634         }
2635
2636         countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2637         alloc_size = ROUND_TO_GROW(countA);
2638
2639         TRACE("Allocating 16-bit ANSI alias buffer\n");
2640         if (!(es->hloc16 = LOCAL_Alloc(hInstance, LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size))) {
2641                 ERR("could not allocate new 16 bit buffer\n");
2642                 return 0;
2643         }
2644
2645         if (!(textA = (LPSTR)LOCAL_Lock(hInstance, es->hloc16))) {
2646                 ERR("could not lock new 16 bit buffer\n");
2647                 LOCAL_Free(hInstance, es->hloc16);
2648                 es->hloc16 = 0;
2649                 return 0;
2650         }
2651
2652         WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2653         LOCAL_Unlock(hInstance, es->hloc16);
2654
2655         TRACE("Returning %04X, LocalSize() = %d\n", es->hloc16, LOCAL_Size(hInstance, es->hloc16));
2656         return es->hloc16;
2657 }
2658
2659
2660 /*********************************************************************
2661  *
2662  *      EM_GETLINE
2663  *
2664  */
2665 static INT EDIT_EM_GetLine(EDITSTATE *es, INT line, LPARAM lParam, BOOL unicode)
2666 {
2667         LPWSTR src;
2668         INT line_len, dst_len;
2669         INT i;
2670
2671         if (es->style & ES_MULTILINE) {
2672                 if (line >= es->line_count)
2673                         return 0;
2674         } else
2675                 line = 0;
2676         i = EDIT_EM_LineIndex(es, line);
2677         src = es->text + i;
2678         line_len = EDIT_EM_LineLength(es, i);
2679         dst_len = *(WORD *)lParam;
2680         if(unicode)
2681         {
2682             LPWSTR dst = (LPWSTR)lParam;
2683             if(dst_len <= line_len)
2684             {
2685                 memcpy(dst, src, dst_len * sizeof(WCHAR));
2686                 return dst_len;
2687             }
2688             else /* Append 0 if enough space */
2689             {
2690                 memcpy(dst, src, line_len * sizeof(WCHAR));
2691                 dst[line_len] = 0;
2692                 return line_len;
2693             }
2694         }
2695         else
2696         {
2697             LPSTR dst = (LPSTR)lParam;
2698             INT ret;
2699             ret = WideCharToMultiByte(CP_ACP, 0, src, line_len, dst, dst_len, NULL, NULL);
2700             if(!ret) /* Insufficient buffer size */
2701                 return dst_len;
2702             if(ret < dst_len) /* Append 0 if enough space */
2703                 dst[ret] = 0;
2704             return ret;
2705         }
2706 }
2707
2708
2709 /*********************************************************************
2710  *
2711  *      EM_GETSEL
2712  *
2713  */
2714 static LRESULT EDIT_EM_GetSel(EDITSTATE *es, LPUINT start, LPUINT end)
2715 {
2716         UINT s = es->selection_start;
2717         UINT e = es->selection_end;
2718
2719         ORDER_UINT(s, e);
2720         if (start)
2721                 *start = s;
2722         if (end)
2723                 *end = e;
2724         return MAKELONG(s, e);
2725 }
2726
2727
2728 /*********************************************************************
2729  *
2730  *      EM_GETTHUMB
2731  *
2732  *      FIXME: is this right ?  (or should it be only VSCROLL)
2733  *      (and maybe only for edit controls that really have their
2734  *      own scrollbars) (and maybe only for multiline controls ?)
2735  *      All in all: very poorly documented
2736  *
2737  */
2738 static LRESULT EDIT_EM_GetThumb(HWND hwnd, EDITSTATE *es)
2739 {
2740         return MAKELONG(EDIT_WM_VScroll(hwnd, es, EM_GETTHUMB16, 0),
2741                 EDIT_WM_HScroll(hwnd, es, EM_GETTHUMB16, 0));
2742 }
2743
2744
2745 /*********************************************************************
2746  *
2747  *      EM_LINEFROMCHAR
2748  *
2749  */
2750 static INT EDIT_EM_LineFromChar(EDITSTATE *es, INT index)
2751 {
2752         INT line;
2753         LINEDEF *line_def;
2754
2755         if (!(es->style & ES_MULTILINE))
2756                 return 0;
2757         if (index > (INT)strlenW(es->text))
2758                 return es->line_count - 1;
2759         if (index == -1)
2760                 index = min(es->selection_start, es->selection_end);
2761
2762         line = 0;
2763         line_def = es->first_line_def;
2764         index -= line_def->length;
2765         while ((index >= 0) && line_def->next) {
2766                 line++;
2767                 line_def = line_def->next;
2768                 index -= line_def->length;
2769         }
2770         return line;
2771 }
2772
2773
2774 /*********************************************************************
2775  *
2776  *      EM_LINEINDEX
2777  *
2778  */
2779 static INT EDIT_EM_LineIndex(EDITSTATE *es, INT line)
2780 {
2781         INT line_index;
2782         LINEDEF *line_def;
2783
2784         if (!(es->style & ES_MULTILINE))
2785                 return 0;
2786         if (line >= es->line_count)
2787                 return -1;
2788
2789         line_index = 0;
2790         line_def = es->first_line_def;
2791         if (line == -1) {
2792                 INT index = es->selection_end - line_def->length;
2793                 while ((index >= 0) && line_def->next) {
2794                         line_index += line_def->length;
2795                         line_def = line_def->next;
2796                         index -= line_def->length;
2797                 }
2798         } else {
2799                 while (line > 0) {
2800                         line_index += line_def->length;
2801                         line_def = line_def->next;
2802                         line--;
2803                 }
2804         }
2805         return line_index;
2806 }
2807
2808
2809 /*********************************************************************
2810  *
2811  *      EM_LINELENGTH
2812  *
2813  */
2814 static INT EDIT_EM_LineLength(EDITSTATE *es, INT index)
2815 {
2816         LINEDEF *line_def;
2817
2818         if (!(es->style & ES_MULTILINE))
2819                 return strlenW(es->text);
2820
2821         if (index == -1) {
2822                 /* get the number of remaining non-selected chars of selected lines */
2823                 INT32 l; /* line number */
2824                 INT32 li; /* index of first char in line */
2825                 INT32 count;
2826                 l = EDIT_EM_LineFromChar(es, es->selection_start);
2827                 /* # chars before start of selection area */
2828                 count = es->selection_start - EDIT_EM_LineIndex(es, l);
2829                 l = EDIT_EM_LineFromChar(es, es->selection_end);
2830                 /* # chars after end of selection */
2831                 li = EDIT_EM_LineIndex(es, l);
2832                 count += li + EDIT_EM_LineLength(es, li) - es->selection_end;
2833                 return count;
2834         }
2835         line_def = es->first_line_def;
2836         index -= line_def->length;
2837         while ((index >= 0) && line_def->next) {
2838                 line_def = line_def->next;
2839                 index -= line_def->length;
2840         }
2841         return line_def->net_length;
2842 }
2843
2844
2845 /*********************************************************************
2846  *
2847  *      EM_LINESCROLL
2848  *
2849  *      NOTE: dx is in average character widths, dy - in lines;
2850  *
2851  */
2852 static BOOL EDIT_EM_LineScroll(HWND hwnd, EDITSTATE *es, INT dx, INT dy)
2853 {
2854         if (!(es->style & ES_MULTILINE))
2855                 return FALSE;
2856
2857         dx *= es->char_width;
2858         return EDIT_EM_LineScroll_internal(hwnd, es, dx, dy);
2859 }
2860
2861 /*********************************************************************
2862  *
2863  *      EDIT_EM_LineScroll_internal
2864  *
2865  *      Version of EDIT_EM_LineScroll for internal use.
2866  *      It doesn't refuse if ES_MULTILINE is set and assumes that
2867  *      dx is in pixels, dy - in lines.
2868  *
2869  */
2870 static BOOL EDIT_EM_LineScroll_internal(HWND hwnd, EDITSTATE *es, INT dx, INT dy)
2871 {
2872         INT nyoff;
2873         INT x_offset_in_pixels;
2874
2875         if (es->style & ES_MULTILINE)
2876         {
2877             x_offset_in_pixels = es->x_offset;
2878         }
2879         else
2880         {
2881             dy = 0;
2882             x_offset_in_pixels = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, es->x_offset, FALSE));
2883         }
2884
2885         if (-dx > x_offset_in_pixels)
2886                 dx = -x_offset_in_pixels;
2887         if (dx > es->text_width - x_offset_in_pixels)
2888                 dx = es->text_width - x_offset_in_pixels;
2889         nyoff = max(0, es->y_offset + dy);
2890         if (nyoff >= es->line_count)
2891                 nyoff = es->line_count - 1;
2892         dy = (es->y_offset - nyoff) * es->line_height;
2893         if (dx || dy) {
2894                 RECT rc1;
2895                 RECT rc;
2896
2897                 es->y_offset = nyoff;
2898                 if(es->style & ES_MULTILINE)
2899                     es->x_offset += dx;
2900                 else
2901                     es->x_offset += dx / es->char_width;
2902
2903                 GetClientRect(hwnd, &rc1);
2904                 IntersectRect(&rc, &rc1, &es->format_rect);
2905                 ScrollWindowEx(hwnd, -dx, dy,
2906                                 NULL, &rc, (HRGN)NULL, NULL, SW_INVALIDATE);
2907                 /* force scroll info update */
2908                 EDIT_UpdateScrollInfo(hwnd, es);
2909         }
2910         if (dx && !(es->flags & EF_HSCROLL_TRACK))
2911                 EDIT_NOTIFY_PARENT(hwnd, es, EN_HSCROLL, "EN_HSCROLL");
2912         if (dy && !(es->flags & EF_VSCROLL_TRACK))
2913                 EDIT_NOTIFY_PARENT(hwnd, es, EN_VSCROLL, "EN_VSCROLL");
2914         return TRUE;
2915 }
2916
2917
2918 /*********************************************************************
2919  *
2920  *      EM_POSFROMCHAR
2921  *
2922  */
2923 static LRESULT EDIT_EM_PosFromChar(HWND hwnd, EDITSTATE *es, INT index, BOOL after_wrap)
2924 {
2925         INT len = strlenW(es->text);
2926         INT l;
2927         INT li;
2928         INT x;
2929         INT y = 0;
2930         HDC dc;
2931         HFONT old_font = 0;
2932         SIZE size;
2933
2934         index = min(index, len);
2935         dc = GetDC(hwnd);
2936         if (es->font)
2937                 old_font = SelectObject(dc, es->font);
2938         if (es->style & ES_MULTILINE) {
2939                 l = EDIT_EM_LineFromChar(es, index);
2940                 y = (l - es->y_offset) * es->line_height;
2941                 li = EDIT_EM_LineIndex(es, l);
2942                 if (after_wrap && (li == index) && l) {
2943                         INT l2 = l - 1;
2944                         LINEDEF *line_def = es->first_line_def;
2945                         while (l2) {
2946                                 line_def = line_def->next;
2947                                 l2--;
2948                         }
2949                         if (line_def->ending == END_WRAP) {
2950                                 l--;
2951                                 y -= es->line_height;
2952                                 li = EDIT_EM_LineIndex(es, l);
2953                         }
2954                 }
2955                 x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
2956                                 es->tabs_count, es->tabs)) - es->x_offset;
2957         } else {
2958                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2959                 if (index < es->x_offset) {
2960                         GetTextExtentPoint32W(dc, text + index,
2961                                         es->x_offset - index, &size);
2962                         x = -size.cx;
2963                 } else {
2964                         GetTextExtentPoint32W(dc, text + es->x_offset,
2965                                         index - es->x_offset, &size);
2966                          x = size.cx;
2967                 }
2968                 y = 0;
2969                 if (es->style & ES_PASSWORD)
2970                         HeapFree(GetProcessHeap(), 0, text);
2971         }
2972         x += es->format_rect.left;
2973         y += es->format_rect.top;
2974         if (es->font)
2975                 SelectObject(dc, old_font);
2976         ReleaseDC(hwnd, dc);
2977         return MAKELONG((INT16)x, (INT16)y);
2978 }
2979
2980
2981 /*********************************************************************
2982  *
2983  *      EM_REPLACESEL
2984  *
2985  *      FIXME: handle ES_NUMBER and ES_OEMCONVERT here
2986  *
2987  */
2988 static void EDIT_EM_ReplaceSel(HWND hwnd, EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update)
2989 {
2990         UINT strl = strlenW(lpsz_replace);
2991         UINT tl = strlenW(es->text);
2992         UINT utl;
2993         UINT s;
2994         UINT e;
2995         UINT i;
2996         LPWSTR p;
2997         HRGN hrgn = 0;
2998
2999         TRACE("%s, can_undo %d, send_update %d\n",
3000             debugstr_w(lpsz_replace), can_undo, send_update);
3001
3002         s = es->selection_start;
3003         e = es->selection_end;
3004
3005         if ((s == e) && !strl)
3006                 return;
3007
3008         ORDER_UINT(s, e);
3009
3010         if (!EDIT_MakeFit(hwnd, es, tl - (e - s) + strl))
3011                 return;
3012
3013         if (e != s) {
3014                 /* there is something to be deleted */
3015                 TRACE("deleting stuff.\n");
3016                 if (can_undo) {
3017                         utl = strlenW(es->undo_text);
3018                         if (!es->undo_insert_count && (*es->undo_text && (s == es->undo_position))) {
3019                                 /* undo-buffer is extended to the right */
3020                                 EDIT_MakeUndoFit(es, utl + e - s);
3021                                 strncpyW(es->undo_text + utl, es->text + s, e - s + 1);
3022                                 (es->undo_text + utl)[e - s] = 0; /* ensure 0 termination */
3023                         } else if (!es->undo_insert_count && (*es->undo_text && (e == es->undo_position))) {
3024                                 /* undo-buffer is extended to the left */
3025                                 EDIT_MakeUndoFit(es, utl + e - s);
3026                                 for (p = es->undo_text + utl ; p >= es->undo_text ; p--)
3027                                         p[e - s] = p[0];
3028                                 for (i = 0 , p = es->undo_text ; i < e - s ; i++)
3029                                         p[i] = (es->text + s)[i];
3030                                 es->undo_position = s;
3031                         } else {
3032                                 /* new undo-buffer */
3033                                 EDIT_MakeUndoFit(es, e - s);
3034                                 strncpyW(es->undo_text, es->text + s, e - s + 1);
3035                                 es->undo_text[e - s] = 0; /* ensure 0 termination */
3036                                 es->undo_position = s;
3037                         }
3038                         /* any deletion makes the old insertion-undo invalid */
3039                         es->undo_insert_count = 0;
3040                 } else
3041                         EDIT_EM_EmptyUndoBuffer(es);
3042
3043                 /* now delete */
3044                 strcpyW(es->text + s, es->text + e);
3045         }
3046         if (strl) {
3047                 /* there is an insertion */
3048                 if (can_undo) {
3049                         if ((s == es->undo_position) ||
3050                                         ((es->undo_insert_count) &&
3051                                         (s == es->undo_position + es->undo_insert_count)))
3052                                 /*
3053                                  * insertion is new and at delete position or
3054                                  * an extension to either left or right
3055                                  */
3056                                 es->undo_insert_count += strl;
3057                         else {
3058                                 /* new insertion undo */
3059                                 es->undo_position = s;
3060                                 es->undo_insert_count = strl;
3061                                 /* new insertion makes old delete-buffer invalid */
3062                                 *es->undo_text = '\0';
3063                         }
3064                 } else
3065                         EDIT_EM_EmptyUndoBuffer(es);
3066
3067                 /* now insert */
3068                 tl = strlenW(es->text);
3069                 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));
3070                 for (p = es->text + tl ; p >= es->text + s ; p--)
3071                         p[strl] = p[0];
3072                 for (i = 0 , p = es->text + s ; i < strl ; i++)
3073                         p[i] = lpsz_replace[i];
3074                 if(es->style & ES_UPPERCASE)
3075                         CharUpperBuffW(p, strl);
3076                 else if(es->style & ES_LOWERCASE)
3077                         CharLowerBuffW(p, strl);
3078                 s += strl;
3079         }
3080         if (es->style & ES_MULTILINE)
3081         {
3082                 INT s = min(es->selection_start, es->selection_end);
3083
3084                 hrgn = CreateRectRgn(0, 0, 0, 0);
3085                 EDIT_BuildLineDefs_ML(hwnd, es, s, s + strl,
3086                                 strl - abs(es->selection_end - es->selection_start), hrgn);
3087         }
3088         else
3089             EDIT_CalcLineWidth_SL(hwnd, es);
3090
3091         EDIT_EM_SetSel(hwnd, es, s, s, FALSE);
3092         es->flags |= EF_MODIFIED;
3093         if (send_update) es->flags |= EF_UPDATE;
3094         EDIT_EM_ScrollCaret(hwnd, es);
3095
3096         /* force scroll info update */
3097         EDIT_UpdateScrollInfo(hwnd, es);
3098
3099         if (hrgn)
3100         {
3101                 EDIT_UpdateTextRegion(hwnd, es, hrgn, TRUE);
3102                 DeleteObject(hrgn);
3103         }
3104         else
3105         EDIT_UpdateText(hwnd, es, NULL, TRUE);
3106
3107         if(es->flags & EF_UPDATE)
3108         {
3109             es->flags &= ~EF_UPDATE;
3110             EDIT_NOTIFY_PARENT(hwnd, es, EN_CHANGE, "EN_CHANGE");
3111         }
3112 }
3113
3114
3115 /*********************************************************************
3116  *
3117  *      EM_SCROLL
3118  *
3119  */
3120 static LRESULT EDIT_EM_Scroll(HWND hwnd, EDITSTATE *es, INT action)
3121 {
3122         INT dy;
3123
3124         if (!(es->style & ES_MULTILINE))
3125                 return (LRESULT)FALSE;
3126
3127         dy = 0;
3128
3129         switch (action) {
3130         case SB_LINEUP:
3131                 if (es->y_offset)
3132                         dy = -1;
3133                 break;
3134         case SB_LINEDOWN:
3135                 if (es->y_offset < es->line_count - 1)
3136                         dy = 1;
3137                 break;
3138         case SB_PAGEUP:
3139                 if (es->y_offset)
3140                         dy = -(es->format_rect.bottom - es->format_rect.top) / es->line_height;
3141                 break;
3142         case SB_PAGEDOWN:
3143                 if (es->y_offset < es->line_count - 1)
3144                         dy = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3145                 break;
3146         default:
3147                 return (LRESULT)FALSE;
3148         }
3149         if (dy) {
3150             INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3151             /* check if we are going to move too far */
3152             if(es->y_offset + dy > es->line_count - vlc)
3153                 dy = es->line_count - vlc - es->y_offset;
3154
3155             /* Notification is done in EDIT_EM_LineScroll */
3156             if(dy)
3157                 EDIT_EM_LineScroll(hwnd, es, 0, dy);
3158         }
3159         return MAKELONG((INT16)dy, (BOOL16)TRUE);
3160 }
3161
3162
3163 /*********************************************************************
3164  *
3165  *      EM_SCROLLCARET
3166  *
3167  */
3168 static void EDIT_EM_ScrollCaret(HWND hwnd, EDITSTATE *es)
3169 {
3170         if (es->style & ES_MULTILINE) {
3171                 INT l;
3172                 INT li;
3173                 INT vlc;
3174                 INT ww;
3175                 INT cw = es->char_width;
3176                 INT x;
3177                 INT dy = 0;
3178                 INT dx = 0;
3179
3180                 l = EDIT_EM_LineFromChar(es, es->selection_end);
3181                 li = EDIT_EM_LineIndex(es, l);
3182                 x = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, es->selection_end, es->flags & EF_AFTER_WRAP));
3183                 vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3184                 if (l >= es->y_offset + vlc)
3185                         dy = l - vlc + 1 - es->y_offset;
3186                 if (l < es->y_offset)
3187                         dy = l - es->y_offset;
3188                 ww = es->format_rect.right - es->format_rect.left;
3189                 if (x < es->format_rect.left)
3190                         dx = x - es->format_rect.left - ww / HSCROLL_FRACTION / cw * cw;
3191                 if (x > es->format_rect.right)
3192                         dx = x - es->format_rect.left - (HSCROLL_FRACTION - 1) * ww / HSCROLL_FRACTION / cw * cw;
3193                 if (dy || dx)
3194                 {
3195                     /* check if we are going to move too far */
3196                     if(es->x_offset + dx + ww > es->text_width)
3197                         dx = es->text_width - ww - es->x_offset;
3198                     if(dx || dy)
3199                         EDIT_EM_LineScroll_internal(hwnd, es, dx, dy);
3200                 }
3201         } else {
3202                 INT x;
3203                 INT goal;
3204                 INT format_width;
3205
3206                 if (!(es->style & ES_AUTOHSCROLL))
3207                         return;
3208
3209                 x = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, es->selection_end, FALSE));
3210                 format_width = es->format_rect.right - es->format_rect.left;
3211                 if (x < es->format_rect.left) {
3212                         goal = es->format_rect.left + format_width / HSCROLL_FRACTION;
3213                         do {
3214                                 es->x_offset--;
3215                                 x = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, es->selection_end, FALSE));
3216                         } while ((x < goal) && es->x_offset);
3217                         /* FIXME: use ScrollWindow() somehow to improve performance */
3218                         EDIT_UpdateText(hwnd, es, NULL, TRUE);
3219                 } else if (x > es->format_rect.right) {
3220                         INT x_last;
3221                         INT len = strlenW(es->text);
3222                         goal = es->format_rect.right - format_width / HSCROLL_FRACTION;
3223                         do {
3224                                 es->x_offset++;
3225                                 x = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, es->selection_end, FALSE));
3226                                 x_last = SLOWORD(EDIT_EM_PosFromChar(hwnd, es, len, FALSE));
3227                         } while ((x > goal) && (x_last > es->format_rect.right));
3228                         /* FIXME: use ScrollWindow() somehow to improve performance */
3229                         EDIT_UpdateText(hwnd, es, NULL, TRUE);
3230                 }
3231         }
3232
3233     if(es->flags & EF_FOCUSED)
3234         EDIT_SetCaretPos(hwnd, es, es->selection_end, es->flags & EF_AFTER_WRAP);
3235 }
3236
3237
3238 /*********************************************************************
3239  *
3240  *      EM_SETHANDLE
3241  *
3242  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3243  *
3244  */
3245 static void EDIT_EM_SetHandle(HWND hwnd, EDITSTATE *es, HLOCAL hloc)
3246 {
3247     HINSTANCE hInstance = GetWindowLongA( hwnd, GWL_HINSTANCE );
3248
3249         if (!(es->style & ES_MULTILINE))
3250                 return;
3251
3252         if (!hloc) {
3253                 WARN("called with NULL handle\n");
3254                 return;
3255         }
3256
3257         EDIT_UnlockBuffer(hwnd, es, TRUE);
3258
3259         if(es->hloc16)
3260         {
3261             LOCAL_Free(hInstance, es->hloc16);
3262             es->hloc16 = (HLOCAL16)NULL;
3263         }
3264
3265         if(es->is_unicode)
3266         {
3267             if(es->hloc32A)
3268             {
3269                 LocalFree(es->hloc32A);
3270                 es->hloc32A = (HLOCAL)NULL;
3271             }
3272             es->hloc32W = hloc;
3273         }
3274         else
3275         {
3276             INT countW, countA;
3277             HLOCAL hloc32W_new;
3278             WCHAR *textW;
3279             CHAR *textA;
3280
3281             countA = LocalSize(hloc);
3282             textA = LocalLock(hloc);
3283             countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3284             if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3285             {
3286                 ERR("Could not allocate new unicode buffer\n");
3287                 return;
3288             }
3289             textW = LocalLock(hloc32W_new);
3290             MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3291             LocalUnlock(hloc32W_new);
3292             LocalUnlock(hloc);
3293
3294             if(es->hloc32W)
3295                 LocalFree(es->hloc32W);
3296
3297             es->hloc32W = hloc32W_new;
3298             es->hloc32A = hloc;
3299         }
3300
3301         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3302
3303         EDIT_LockBuffer(hwnd, es);
3304
3305         es->x_offset = es->y_offset = 0;
3306         es->selection_start = es->selection_end = 0;
3307         EDIT_EM_EmptyUndoBuffer(es);
3308         es->flags &= ~EF_MODIFIED;
3309         es->flags &= ~EF_UPDATE;
3310         EDIT_BuildLineDefs_ML(hwnd, es, 0, strlenW(es->text), 0, (HRGN)0);
3311         EDIT_UpdateText(hwnd, es, NULL, TRUE);
3312         EDIT_EM_ScrollCaret(hwnd, es);
3313         /* force scroll info update */
3314         EDIT_UpdateScrollInfo(hwnd, es);
3315 }
3316
3317
3318 /*********************************************************************
3319  *
3320  *      EM_SETHANDLE16
3321  *
3322  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3323  *
3324  */
3325 static void EDIT_EM_SetHandle16(HWND hwnd, EDITSTATE *es, HLOCAL16 hloc)
3326 {
3327     HINSTANCE hInstance = GetWindowLongA( hwnd, GWL_HINSTANCE );
3328         INT countW, countA;
3329         HLOCAL hloc32W_new;
3330         WCHAR *textW;
3331         CHAR *textA;
3332
3333         if (!(es->style & ES_MULTILINE))
3334                 return;
3335
3336         if (!hloc) {
3337                 WARN("called with NULL handle\n");
3338                 return;
3339         }
3340
3341         EDIT_UnlockBuffer(hwnd, es, TRUE);
3342
3343         if(es->hloc32A)
3344         {
3345             LocalFree(es->hloc32A);
3346             es->hloc32A = (HLOCAL)NULL;
3347         }
3348
3349         countA = LOCAL_Size(hInstance, hloc);
3350         textA = LOCAL_Lock(hInstance, hloc);
3351         countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3352         if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3353         {
3354             ERR("Could not allocate new unicode buffer\n");
3355             return;
3356         }
3357         textW = LocalLock(hloc32W_new);
3358         MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3359         LocalUnlock(hloc32W_new);
3360         LOCAL_Unlock(hInstance, hloc);
3361
3362         if(es->hloc32W)
3363             LocalFree(es->hloc32W);
3364
3365         es->hloc32W = hloc32W_new;
3366         es->hloc16 = hloc;
3367
3368         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3369
3370         EDIT_LockBuffer(hwnd, es);
3371
3372         es->x_offset = es->y_offset = 0;
3373         es->selection_start = es->selection_end = 0;
3374         EDIT_EM_EmptyUndoBuffer(es);
3375         es->flags &= ~EF_MODIFIED;
3376         es->flags &= ~EF_UPDATE;
3377         EDIT_BuildLineDefs_ML(hwnd, es, 0, strlenW(es->text), 0, (HRGN)0);
3378         EDIT_UpdateText(hwnd, es, NULL, TRUE);
3379         EDIT_EM_ScrollCaret(hwnd, es);
3380         /* force scroll info update */
3381         EDIT_UpdateScrollInfo(hwnd, es);
3382 }
3383
3384
3385 /*********************************************************************
3386  *
3387  *      EM_SETLIMITTEXT
3388  *
3389  *      FIXME: in WinNT maxsize is 0x7FFFFFFF / 0xFFFFFFFF
3390  *      However, the windows version is not complied to yet in all of edit.c
3391  *
3392  */
3393 static void EDIT_EM_SetLimitText(EDITSTATE *es, INT limit)
3394 {
3395         if (es->style & ES_MULTILINE) {
3396                 if (limit)
3397                         es->buffer_limit = min(limit, BUFLIMIT_MULTI);
3398                 else
3399                         es->buffer_limit = BUFLIMIT_MULTI;
3400         } else {
3401                 if (limit)
3402                         es->buffer_limit = min(limit, BUFLIMIT_SINGLE);
3403                 else
3404                         es->buffer_limit = BUFLIMIT_SINGLE;
3405         }
3406 }
3407
3408
3409 /*********************************************************************
3410  *
3411  *      EM_SETMARGINS
3412  *
3413  * EC_USEFONTINFO is used as a left or right value i.e. lParam and not as an
3414  * action wParam despite what the docs say. EC_USEFONTINFO means one third
3415  * of the char's width, according to the new docs.
3416  *
3417  */
3418 static void EDIT_EM_SetMargins(EDITSTATE *es, INT action,
3419                                INT left, INT right)
3420 {
3421         if (action & EC_LEFTMARGIN) {
3422                 if (left != EC_USEFONTINFO)
3423                         es->left_margin = left;
3424                 else
3425                         es->left_margin = es->char_width / 3;
3426         }
3427
3428         if (action & EC_RIGHTMARGIN) {
3429                 if (right != EC_USEFONTINFO)
3430                         es->right_margin = right;
3431                 else
3432                         es->right_margin = es->char_width / 3;
3433         }
3434         TRACE("left=%d, right=%d\n", es->left_margin, es->right_margin);
3435 }
3436
3437
3438 /*********************************************************************
3439  *
3440  *      EM_SETPASSWORDCHAR
3441  *
3442  */
3443 static void EDIT_EM_SetPasswordChar(HWND hwnd, EDITSTATE *es, WCHAR c)
3444 {
3445     LONG style;
3446
3447         if (es->style & ES_MULTILINE)
3448                 return;
3449
3450         if (es->password_char == c)
3451                 return;
3452
3453         style = GetWindowLongA( hwnd, GWL_STYLE );
3454         es->password_char = c;
3455         if (c) {
3456             SetWindowLongA( hwnd, GWL_STYLE, style | ES_PASSWORD );
3457             es->style |= ES_PASSWORD;
3458         } else {
3459             SetWindowLongA( hwnd, GWL_STYLE, style & ~ES_PASSWORD );
3460             es->style &= ~ES_PASSWORD;
3461         }
3462         EDIT_UpdateText(hwnd, es, NULL, TRUE);
3463 }
3464
3465
3466 /*********************************************************************
3467  *
3468  *      EDIT_EM_SetSel
3469  *
3470  *      note:   unlike the specs say: the order of start and end
3471  *              _is_ preserved in Windows.  (i.e. start can be > end)
3472  *              In other words: this handler is OK
3473  *
3474  */
3475 static void EDIT_EM_SetSel(HWND hwnd, EDITSTATE *es, UINT start, UINT end, BOOL after_wrap)
3476 {
3477         UINT old_start = es->selection_start;
3478         UINT old_end = es->selection_end;
3479         UINT len = strlenW(es->text);
3480
3481         if (start == (UINT)-1) {
3482                 start = es->selection_end;
3483                 end = es->selection_end;
3484         } else {
3485                 start = min(start, len);
3486                 end = min(end, len);
3487         }
3488         es->selection_start = start;
3489         es->selection_end = end;
3490         if (after_wrap)
3491                 es->flags |= EF_AFTER_WRAP;
3492         else
3493                 es->flags &= ~EF_AFTER_WRAP;
3494 /* This is a little bit more efficient than before, not sure if it can be improved. FIXME? */
3495         ORDER_UINT(start, end);
3496         ORDER_UINT(end, old_end);
3497         ORDER_UINT(start, old_start);
3498         ORDER_UINT(old_start, old_end);
3499         if (end != old_start)
3500         {
3501 /*
3502  * One can also do
3503  *          ORDER_UINT32(end, old_start);
3504  *          EDIT_InvalidateText(hwnd, es, start, end);
3505  *          EDIT_InvalidateText(hwnd, es, old_start, old_end);
3506  * in place of the following if statement.
3507  */
3508             if (old_start > end )
3509             {
3510                 EDIT_InvalidateText(hwnd, es, start, end);
3511                 EDIT_InvalidateText(hwnd, es, old_start, old_end);
3512             }
3513             else
3514             {
3515                 EDIT_InvalidateText(hwnd, es, start, old_start);
3516                 EDIT_InvalidateText(hwnd, es, end, old_end);
3517             }
3518         }
3519         else EDIT_InvalidateText(hwnd, es, start, old_end);
3520 }
3521
3522
3523 /*********************************************************************
3524  *
3525  *      EM_SETTABSTOPS
3526  *
3527  */
3528 static BOOL EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs)
3529 {
3530         if (!(es->style & ES_MULTILINE))
3531                 return FALSE;
3532         if (es->tabs)
3533                 HeapFree(GetProcessHeap(), 0, es->tabs);
3534         es->tabs_count = count;
3535         if (!count)
3536                 es->tabs = NULL;
3537         else {
3538                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3539                 memcpy(es->tabs, tabs, count * sizeof(INT));
3540         }
3541         return TRUE;
3542 }
3543
3544
3545 /*********************************************************************
3546  *
3547  *      EM_SETTABSTOPS16
3548  *
3549  */
3550 static BOOL EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs)
3551 {
3552         if (!(es->style & ES_MULTILINE))
3553                 return FALSE;
3554         if (es->tabs)
3555                 HeapFree(GetProcessHeap(), 0, es->tabs);
3556         es->tabs_count = count;
3557         if (!count)
3558                 es->tabs = NULL;
3559         else {
3560                 INT i;
3561                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3562                 for (i = 0 ; i < count ; i++)
3563                         es->tabs[i] = *tabs++;
3564         }
3565         return TRUE;
3566 }
3567
3568
3569 /*********************************************************************
3570  *
3571  *      EM_SETWORDBREAKPROC
3572  *
3573  */
3574 static void EDIT_EM_SetWordBreakProc(HWND hwnd, EDITSTATE *es, LPARAM lParam)
3575 {
3576         if (es->word_break_proc == (void *)lParam)
3577                 return;
3578
3579         es->word_break_proc = (void *)lParam;
3580         es->word_break_proc16 = NULL;
3581
3582         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3583                 EDIT_BuildLineDefs_ML(hwnd, es, 0, strlenW(es->text), 0, (HRGN)0);
3584                 EDIT_UpdateText(hwnd, es, NULL, TRUE);
3585         }
3586 }
3587
3588
3589 /*********************************************************************
3590  *
3591  *      EM_SETWORDBREAKPROC16
3592  *
3593  */
3594 static void EDIT_EM_SetWordBreakProc16(HWND hwnd, EDITSTATE *es, EDITWORDBREAKPROC16 wbp)
3595 {
3596         if (es->word_break_proc16 == wbp)
3597                 return;
3598
3599         es->word_break_proc = NULL;
3600         es->word_break_proc16 = wbp;
3601         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3602                 EDIT_BuildLineDefs_ML(hwnd, es, 0, strlenW(es->text), 0, (HRGN)0);
3603                 EDIT_UpdateText(hwnd, es, NULL, TRUE);
3604         }
3605 }
3606
3607
3608 /*********************************************************************
3609  *
3610  *      EM_UNDO / WM_UNDO
3611  *
3612  */
3613 static BOOL EDIT_EM_Undo(HWND hwnd, EDITSTATE *es)
3614 {
3615         INT ulength;
3616         LPWSTR utext;
3617
3618         /* Protect read-only edit control from modification */
3619         if(es->style & ES_READONLY)
3620             return FALSE;
3621
3622         ulength = strlenW(es->undo_text);
3623         utext = HeapAlloc(GetProcessHeap(), 0, (ulength + 1) * sizeof(WCHAR));
3624
3625         strcpyW(utext, es->undo_text);
3626
3627         TRACE("before UNDO:insertion length = %d, deletion buffer = %s\n",
3628                      es->undo_insert_count, debugstr_w(utext));
3629
3630         EDIT_EM_SetSel(hwnd, es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3631         EDIT_EM_EmptyUndoBuffer(es);
3632         EDIT_EM_ReplaceSel(hwnd, es, TRUE, utext, FALSE);
3633         EDIT_EM_SetSel(hwnd, es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3634         /* send the notification after the selection start and end are set */
3635         EDIT_NOTIFY_PARENT(hwnd, es, EN_CHANGE, "EN_CHANGE");
3636         EDIT_EM_ScrollCaret(hwnd, es);
3637         HeapFree(GetProcessHeap(), 0, utext);
3638
3639         TRACE("after UNDO:insertion length = %d, deletion buffer = %s\n",
3640                         es->undo_insert_count, debugstr_w(es->undo_text));
3641         return TRUE;
3642 }
3643
3644
3645 /*********************************************************************
3646  *
3647  *      WM_CHAR
3648  *
3649  */
3650 static void EDIT_WM_Char(HWND hwnd, EDITSTATE *es, WCHAR c)
3651 {
3652         BOOL control;
3653
3654         /* Protect read-only edit control from modification */
3655         if(es->style & ES_READONLY)
3656             return;
3657
3658         control = GetKeyState(VK_CONTROL) & 0x8000;
3659
3660         switch (c) {
3661         case '\r':
3662             /* If the edit doesn't want the return and it's not a multiline edit, do nothing */
3663             if(!(es->style & ES_MULTILINE) && !(es->style & ES_WANTRETURN))
3664                 break;
3665         case '\n':
3666                 if (es->style & ES_MULTILINE) {
3667                         if (es->style & ES_READONLY) {
3668                                 EDIT_MoveHome(hwnd, es, FALSE);
3669                                 EDIT_MoveDown_ML(hwnd, es, FALSE);
3670                         } else {
3671                                 static const WCHAR cr_lfW[] = {'\r','\n',0};
3672                                 EDIT_EM_ReplaceSel(hwnd, es, TRUE, cr_lfW, TRUE);
3673                         }
3674                 }
3675                 break;
3676         case '\t':
3677                 if ((es->style & ES_MULTILINE) && !(es->style & ES_READONLY))
3678                 {
3679                         static const WCHAR tabW[] = {'\t',0};
3680                         EDIT_EM_ReplaceSel(hwnd, es, TRUE, tabW, TRUE);
3681                 }
3682                 break;
3683         case VK_BACK:
3684                 if (!(es->style & ES_READONLY) && !control) {
3685                         if (es->selection_start != es->selection_end)
3686                                 EDIT_WM_Clear(hwnd, es);
3687                         else {
3688                                 /* delete character left of caret */
3689                                 EDIT_EM_SetSel(hwnd, es, (UINT)-1, 0, FALSE);
3690                                 EDIT_MoveBackward(hwnd, es, TRUE);
3691                                 EDIT_WM_Clear(hwnd, es);
3692                         }
3693                 }
3694                 break;
3695         case 0x03: /* ^C */
3696                 SendMessageW(hwnd, WM_COPY, 0, 0);
3697                 break;
3698         case 0x16: /* ^V */
3699                 SendMessageW(hwnd, WM_PASTE, 0, 0);
3700                 break;
3701         case 0x18: /* ^X */
3702                 SendMessageW(hwnd, WM_CUT, 0, 0);
3703                 break;
3704
3705         default:
3706                 if (!(es->style & ES_READONLY) && (c >= ' ') && (c != 127)) {
3707                         WCHAR str[2];
3708                         str[0] = c;
3709                         str[1] = '\0';
3710                         EDIT_EM_ReplaceSel(hwnd, es, TRUE, str, TRUE);
3711                 }
3712                 break;
3713         }
3714 }
3715
3716
3717 /*********************************************************************
3718  *
3719  *      WM_COMMAND
3720  *
3721  */
3722 static void EDIT_WM_Command(HWND hwnd, EDITSTATE *es, INT code, INT id, HWND control)
3723 {
3724         if (code || control)
3725                 return;
3726
3727         switch (id) {
3728                 case EM_UNDO:
3729                         EDIT_EM_Undo(hwnd, es);
3730                         break;
3731                 case WM_CUT:
3732                         EDIT_WM_Cut(hwnd, es);
3733                         break;
3734                 case WM_COPY:
3735                         EDIT_WM_Copy(hwnd, es);
3736                         break;
3737                 case WM_PASTE:
3738                         EDIT_WM_Paste(hwnd, es);
3739                         break;
3740                 case WM_CLEAR:
3741                         EDIT_WM_Clear(hwnd, es);
3742                         break;
3743                 case EM_SETSEL:
3744                         EDIT_EM_SetSel(hwnd, es, 0, (UINT)-1, FALSE);
3745                         EDIT_EM_ScrollCaret(hwnd, es);
3746                         break;
3747                 default:
3748                         ERR("unknown menu item, please report\n");
3749                         break;
3750         }
3751 }
3752
3753
3754 /*********************************************************************
3755  *
3756  *      WM_CONTEXTMENU
3757  *
3758  *      Note: the resource files resource/sysres_??.rc cannot define a
3759  *              single popup menu.  Hence we use a (dummy) menubar
3760  *              containing the single popup menu as its first item.
3761  *
3762  *      FIXME: the message identifiers have been chosen arbitrarily,
3763  *              hence we use MF_BYPOSITION.
3764  *              We might as well use the "real" values (anybody knows ?)
3765  *              The menu definition is in resources/sysres_??.rc.
3766  *              Once these are OK, we better use MF_BYCOMMAND here
3767  *              (as we do in EDIT_WM_Command()).
3768  *
3769  */
3770 static void EDIT_WM_ContextMenu(HWND hwnd, EDITSTATE *es, INT x, INT y)
3771 {
3772         HMENU menu = LoadMenuA(GetModuleHandleA("USER32"), "EDITMENU");
3773         HMENU popup = GetSubMenu(menu, 0);
3774         UINT start = es->selection_start;
3775         UINT end = es->selection_end;
3776
3777         ORDER_UINT(start, end);
3778
3779         /* undo */
3780         EnableMenuItem(popup, 0, MF_BYPOSITION | (EDIT_EM_CanUndo(es) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3781         /* cut */
3782         EnableMenuItem(popup, 2, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3783         /* copy */
3784         EnableMenuItem(popup, 3, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) ? MF_ENABLED : MF_GRAYED));
3785         /* paste */
3786         EnableMenuItem(popup, 4, MF_BYPOSITION | (IsClipboardFormatAvailable(CF_UNICODETEXT) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3787         /* delete */
3788         EnableMenuItem(popup, 5, MF_BYPOSITION | ((end - start) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3789         /* select all */
3790         EnableMenuItem(popup, 7, MF_BYPOSITION | (start || (end != strlenW(es->text)) ? MF_ENABLED : MF_GRAYED));
3791
3792         TrackPopupMenu(popup, TPM_LEFTALIGN | TPM_RIGHTBUTTON, x, y, 0, hwnd, NULL);
3793         DestroyMenu(menu);
3794 }
3795
3796
3797 /*********************************************************************
3798  *
3799  *      WM_COPY
3800  *
3801  */
3802 static void EDIT_WM_Copy(HWND hwnd, EDITSTATE *es)
3803 {
3804         INT s = es->selection_start;
3805         INT e = es->selection_end;
3806         HGLOBAL hdst;
3807         LPWSTR dst;
3808
3809         if (e == s)
3810                 return;
3811         ORDER_INT(s, e);
3812         hdst = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, (DWORD)(e - s + 1) * sizeof(WCHAR));
3813         dst = GlobalLock(hdst);
3814         strncpyW(dst, es->text + s, e - s);
3815         dst[e - s] = 0; /* ensure 0 termination */
3816         TRACE("%s\n", debugstr_w(dst));
3817         GlobalUnlock(hdst);
3818         OpenClipboard(hwnd);
3819         EmptyClipboard();
3820         SetClipboardData(CF_UNICODETEXT, hdst);
3821         CloseClipboard();
3822 }
3823
3824
3825 /*********************************************************************
3826  *
3827  *      WM_CREATE
3828  *
3829  */
3830 static LRESULT EDIT_WM_Create(HWND hwnd, EDITSTATE *es, LPCWSTR name)
3831 {
3832         TRACE("%s\n", debugstr_w(name));
3833        /*
3834         *       To initialize some final structure members, we call some helper
3835         *       functions.  However, since the EDITSTATE is not consistent (i.e.
3836         *       not fully initialized), we should be very careful which
3837         *       functions can be called, and in what order.
3838         */
3839         EDIT_WM_SetFont(hwnd, es, 0, FALSE);
3840         EDIT_EM_EmptyUndoBuffer(es);
3841
3842        if (name && *name) {
3843            EDIT_EM_ReplaceSel(hwnd, es, FALSE, name, FALSE);
3844            /* if we insert text to the editline, the text scrolls out
3845             * of the window, as the caret is placed after the insert
3846             * pos normally; thus we reset es->selection... to 0 and
3847             * update caret
3848             */
3849            es->selection_start = es->selection_end = 0;
3850            /* send the notification after the selection start and end are set */
3851            EDIT_NOTIFY_PARENT(hwnd, es, EN_CHANGE, "EN_CHANGE");
3852            EDIT_EM_ScrollCaret(hwnd, es);
3853        }
3854        /* force scroll info update */
3855        EDIT_UpdateScrollInfo(hwnd, es);
3856        return 0;
3857 }
3858
3859
3860 /*********************************************************************
3861  *
3862  *      WM_DESTROY
3863  *
3864  */
3865 static void EDIT_WM_Destroy(HWND hwnd, EDITSTATE *es)
3866 {
3867     HINSTANCE hInstance = GetWindowLongA( hwnd, GWL_HINSTANCE );
3868         LINEDEF *pc, *pp;
3869
3870         if (es->hloc32W) {
3871                 while (LocalUnlock(es->hloc32W)) ;
3872                 LocalFree(es->hloc32W);
3873         }
3874         if (es->hloc32A) {
3875                 while (LocalUnlock(es->hloc32A)) ;
3876                 LocalFree(es->hloc32A);
3877         }
3878         if (es->hloc16) {
3879                 while (LOCAL_Unlock(hInstance, es->hloc16)) ;
3880                 LOCAL_Free(hInstance, es->hloc16);
3881         }
3882
3883         pc = es->first_line_def;
3884         while (pc)
3885         {
3886                 pp = pc->next;
3887                 HeapFree(GetProcessHeap(), 0, pc);
3888                 pc = pp;
3889         }
3890
3891         SetWindowLongA( hwnd, 0, 0 );
3892         HeapFree(GetProcessHeap(), 0, es);
3893 }
3894
3895
3896 /*********************************************************************
3897  *
3898  *      WM_ERASEBKGND
3899  *
3900  */
3901 static LRESULT EDIT_WM_EraseBkGnd(HWND hwnd, EDITSTATE *es, HDC dc)
3902 {
3903         HBRUSH brush;
3904         RECT rc;
3905
3906         if ( get_app_version() >= 0x40000 &&(
3907                     !es->bEnableState || (es->style & ES_READONLY)))
3908                 brush = (HBRUSH)EDIT_SEND_CTLCOLORSTATIC(hwnd, dc);
3909         else
3910                 brush = (HBRUSH)EDIT_SEND_CTLCOLOR(hwnd, dc);
3911
3912         if (!brush)
3913                 brush = (HBRUSH)GetStockObject(WHITE_BRUSH);
3914
3915         GetClientRect(hwnd, &rc);
3916         IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
3917         GetClipBox(dc, &rc);
3918         /*
3919          *      FIXME:  specs say that we should UnrealizeObject() the brush,
3920          *              but the specs of UnrealizeObject() say that we shouldn't
3921          *              unrealize a stock object.  The default brush that
3922          *              DefWndProc() returns is ... a stock object.
3923          */
3924         FillRect(dc, &rc, brush);
3925         return -1;
3926 }
3927
3928
3929 /*********************************************************************
3930  *
3931  *      WM_GETTEXT
3932  *
3933  */
3934 static INT EDIT_WM_GetText(EDITSTATE *es, INT count, LPARAM lParam, BOOL unicode)
3935 {
3936     if(!count) return 0;
3937
3938     if(unicode)
3939     {
3940         LPWSTR textW = (LPWSTR)lParam;
3941         strncpyW(textW, es->text, count);
3942         textW[count - 1] = 0; /* ensure 0 termination */
3943         return strlenW(textW);
3944     }
3945     else
3946     {
3947         LPSTR textA = (LPSTR)lParam;
3948         WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, count, NULL, NULL);
3949         textA[count - 1] = 0; /* ensure 0 termination */
3950         return strlen(textA);
3951     }
3952 }
3953
3954 /*********************************************************************
3955  *
3956  *      WM_HSCROLL
3957  *
3958  */
3959 static LRESULT EDIT_WM_HScroll(HWND hwnd, EDITSTATE *es, INT action, INT pos)
3960 {
3961         INT dx;
3962         INT fw;
3963
3964         if (!(es->style & ES_MULTILINE))
3965                 return 0;
3966
3967         if (!(es->style & ES_AUTOHSCROLL))
3968                 return 0;
3969
3970         dx = 0;
3971         fw = es->format_rect.right - es->format_rect.left;
3972         switch (action) {
3973         case SB_LINELEFT:
3974                 TRACE("SB_LINELEFT\n");
3975                 if (es->x_offset)
3976                         dx = -es->char_width;
3977                 break;
3978         case SB_LINERIGHT:
3979                 TRACE("SB_LINERIGHT\n");
3980                 if (es->x_offset < es->text_width)
3981                         dx = es->char_width;
3982                 break;
3983         case SB_PAGELEFT:
3984                 TRACE("SB_PAGELEFT\n");
3985                 if (es->x_offset)
3986                         dx = -fw / HSCROLL_FRACTION / es->char_width * es->char_width;
3987                 break;
3988         case SB_PAGERIGHT:
3989                 TRACE("SB_PAGERIGHT\n");
3990                 if (es->x_offset < es->text_width)
3991                         dx = fw / HSCROLL_FRACTION / es->char_width * es->char_width;
3992                 break;
3993         case SB_LEFT:
3994                 TRACE("SB_LEFT\n");
3995                 if (es->x_offset)
3996                         dx = -es->x_offset;
3997                 break;
3998         case SB_RIGHT:
3999                 TRACE("SB_RIGHT\n");
4000                 if (es->x_offset < es->text_width)
4001                         dx = es->text_width - es->x_offset;
4002                 break;
4003         case SB_THUMBTRACK:
4004                 TRACE("SB_THUMBTRACK %d\n", pos);
4005                 es->flags |= EF_HSCROLL_TRACK;
4006                 if(es->style & WS_HSCROLL)
4007                     dx = pos - es->x_offset;
4008                 else
4009                 {
4010                     INT fw, new_x;
4011                     /* Sanity check */
4012                     if(pos < 0 || pos > 100) return 0;
4013                     /* Assume default scroll range 0-100 */
4014                     fw = es->format_rect.right - es->format_rect.left;
4015                     new_x = pos * (es->text_width - fw) / 100;
4016                     dx = es->text_width ? (new_x - es->x_offset) : 0;
4017                 }
4018                 break;
4019         case SB_THUMBPOSITION:
4020                 TRACE("SB_THUMBPOSITION %d\n", pos);
4021                 es->flags &= ~EF_HSCROLL_TRACK;
4022                 if(GetWindowLongA( hwnd, GWL_STYLE ) & WS_HSCROLL)
4023                     dx = pos - es->x_offset;
4024                 else
4025                 {
4026                     INT fw, new_x;
4027                     /* Sanity check */
4028                     if(pos < 0 || pos > 100) return 0;
4029                     /* Assume default scroll range 0-100 */
4030                     fw = es->format_rect.right - es->format_rect.left;
4031                     new_x = pos * (es->text_width - fw) / 100;
4032                     dx = es->text_width ? (new_x - es->x_offset) : 0;
4033                 }
4034                 if (!dx) {
4035                         /* force scroll info update */
4036                         EDIT_UpdateScrollInfo(hwnd, es);
4037                         EDIT_NOTIFY_PARENT(hwnd, es, EN_HSCROLL, "EN_HSCROLL");
4038                 }
4039                 break;
4040         case SB_ENDSCROLL:
4041                 TRACE("SB_ENDSCROLL\n");
4042                 break;
4043         /*
4044          *      FIXME : the next two are undocumented !
4045          *      Are we doing the right thing ?
4046          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
4047          *      although it's also a regular control message.
4048          */
4049         case EM_GETTHUMB: /* this one is used by NT notepad */
4050         case EM_GETTHUMB16:
4051         {
4052                 LRESULT ret;
4053                 if(GetWindowLongA( hwnd, GWL_STYLE ) & WS_HSCROLL)
4054                     ret = GetScrollPos(hwnd, SB_HORZ);
4055                 else
4056                 {
4057                     /* Assume default scroll range 0-100 */
4058                     INT fw = es->format_rect.right - es->format_rect.left;
4059                     ret = es->text_width ? es->x_offset * 100 / (es->text_width - fw) : 0;
4060                 }
4061                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
4062                 return ret;
4063         }
4064         case EM_LINESCROLL16:
4065                 TRACE("EM_LINESCROLL16\n");
4066                 dx = pos;
4067                 break;
4068
4069         default:
4070                 ERR("undocumented WM_HSCROLL action %d (0x%04x), please report\n",
4071                     action, action);
4072                 return 0;
4073         }
4074         if (dx)
4075         {
4076             INT fw = es->format_rect.right - es->format_rect.left;
4077             /* check if we are going to move too far */
4078             if(es->x_offset + dx + fw > es->text_width)
4079                 dx = es->text_width - fw - es->x_offset;
4080             if(dx)
4081                 EDIT_EM_LineScroll_internal(hwnd, es, dx, 0);
4082         }
4083         return 0;
4084 }
4085
4086
4087 /*********************************************************************
4088  *
4089  *      EDIT_CheckCombo
4090  *
4091  */
4092 static BOOL EDIT_CheckCombo(HWND hwnd, EDITSTATE *es, UINT msg, INT key)
4093 {
4094    HWND hLBox = es->hwndListBox;
4095    HWND hCombo;
4096    BOOL bDropped;
4097    int  nEUI;
4098
4099    if (!hLBox)
4100       return FALSE;
4101
4102    hCombo   = GetParent(hwnd);
4103    bDropped = TRUE;
4104    nEUI     = 0;
4105
4106    TRACE_(combo)("[%04x]: handling msg %04x (%04x)\n",
4107                      hwnd, (UINT16)msg, (UINT16)key);
4108
4109    if (key == VK_UP || key == VK_DOWN)
4110    {
4111       if (SendMessageW(hCombo, CB_GETEXTENDEDUI, 0, 0))
4112          nEUI = 1;
4113
4114       if (msg == WM_KEYDOWN || nEUI)
4115           bDropped = (BOOL)SendMessageW(hCombo, CB_GETDROPPEDSTATE, 0, 0);
4116    }
4117
4118    switch (msg)
4119    {
4120       case WM_KEYDOWN:
4121          if (!bDropped && nEUI && (key == VK_UP || key == VK_DOWN))
4122          {
4123             /* make sure ComboLBox pops up */
4124             SendMessageW(hCombo, CB_SETEXTENDEDUI, FALSE, 0);
4125             key = VK_F4;
4126             nEUI = 2;
4127          }
4128
4129          SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)key, 0);
4130          break;
4131
4132       case WM_SYSKEYDOWN: /* Handle Alt+up/down arrows */
4133          if (nEUI)
4134             SendMessageW(hCombo, CB_SHOWDROPDOWN, bDropped ? FALSE : TRUE, 0);
4135          else
4136             SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)VK_F4, 0);
4137          break;
4138    }
4139
4140    if(nEUI == 2)
4141       SendMessageW(hCombo, CB_SETEXTENDEDUI, TRUE, 0);
4142
4143    return TRUE;
4144 }
4145
4146
4147 /*********************************************************************
4148  *
4149  *      WM_KEYDOWN
4150  *
4151  *      Handling of special keys that don't produce a WM_CHAR
4152  *      (i.e. non-printable keys) & Backspace & Delete
4153  *
4154  */
4155 static LRESULT EDIT_WM_KeyDown(HWND hwnd, EDITSTATE *es, INT key)
4156 {
4157         BOOL shift;
4158         BOOL control;
4159
4160         if (GetKeyState(VK_MENU) & 0x8000)
4161                 return 0;
4162
4163         shift = GetKeyState(VK_SHIFT) & 0x8000;
4164         control = GetKeyState(VK_CONTROL) & 0x8000;
4165
4166         switch (key) {
4167         case VK_F4:
4168         case VK_UP:
4169                 if (EDIT_CheckCombo(hwnd, es, WM_KEYDOWN, key) || key == VK_F4)
4170                         break;
4171
4172                 /* fall through */
4173         case VK_LEFT:
4174                 if ((es->style & ES_MULTILINE) && (key == VK_UP))
4175                         EDIT_MoveUp_ML(hwnd, es, shift);
4176                 else
4177                         if (control)
4178                                 EDIT_MoveWordBackward(hwnd, es, shift);
4179                         else
4180                                 EDIT_MoveBackward(hwnd, es, shift);
4181                 break;
4182         case VK_DOWN:
4183                 if (EDIT_CheckCombo(hwnd, es, WM_KEYDOWN, key))
4184                         break;
4185                 /* fall through */
4186         case VK_RIGHT:
4187                 if ((es->style & ES_MULTILINE) && (key == VK_DOWN))
4188                         EDIT_MoveDown_ML(hwnd, es, shift);
4189                 else if (control)
4190                         EDIT_MoveWordForward(hwnd, es, shift);
4191                 else
4192                         EDIT_MoveForward(hwnd, es, shift);
4193                 break;
4194         case VK_HOME:
4195                 EDIT_MoveHome(hwnd, es, shift);
4196                 break;
4197         case VK_END:
4198                 EDIT_MoveEnd(hwnd, es, shift);
4199                 break;
4200         case VK_PRIOR:
4201                 if (es->style & ES_MULTILINE)
4202                         EDIT_MovePageUp_ML(hwnd, es, shift);
4203                 else
4204                         EDIT_CheckCombo(hwnd, es, WM_KEYDOWN, key);
4205                 break;
4206         case VK_NEXT:
4207                 if (es->style & ES_MULTILINE)
4208                         EDIT_MovePageDown_ML(hwnd, es, shift);
4209                 else
4210                         EDIT_CheckCombo(hwnd, es, WM_KEYDOWN, key);
4211                 break;
4212         case VK_DELETE:
4213                 if (!(es->style & ES_READONLY) && !(shift && control)) {
4214                         if (es->selection_start != es->selection_end) {
4215                                 if (shift)
4216                                         EDIT_WM_Cut(hwnd, es);
4217                                 else
4218                                         EDIT_WM_Clear(hwnd, es);
4219                         } else {
4220                                 if (shift) {
4221                                         /* delete character left of caret */
4222                                         EDIT_EM_SetSel(hwnd, es, (UINT)-1, 0, FALSE);
4223                                         EDIT_MoveBackward(hwnd, es, TRUE);
4224                                         EDIT_WM_Clear(hwnd, es);
4225                                 } else if (control) {
4226                                         /* delete to end of line */
4227                                         EDIT_EM_SetSel(hwnd, es, (UINT)-1, 0, FALSE);
4228                                         EDIT_MoveEnd(hwnd, es, TRUE);
4229                                         EDIT_WM_Clear(hwnd, es);
4230                                 } else {
4231                                         /* delete character right of caret */
4232                                         EDIT_EM_SetSel(hwnd, es, (UINT)-1, 0, FALSE);
4233                                         EDIT_MoveForward(hwnd, es, TRUE);
4234                                         EDIT_WM_Clear(hwnd, es);
4235                                 }
4236                         }
4237                 }
4238                 break;
4239         case VK_INSERT:
4240                 if (shift) {
4241                         if (!(es->style & ES_READONLY))
4242                                 EDIT_WM_Paste(hwnd, es);
4243                 } else if (control)
4244                         EDIT_WM_Copy(hwnd, es);
4245                 break;
4246         case VK_RETURN:
4247             /* If the edit doesn't want the return send a message to the default object */
4248             if(!(es->style & ES_WANTRETURN))
4249             {
4250                 HWND hwndParent = GetParent(hwnd);
4251                 DWORD dw = SendMessageW( hwndParent, DM_GETDEFID, 0, 0 );
4252                 if (HIWORD(dw) == DC_HASDEFID)
4253                 {
4254                     SendMessageW( hwndParent, WM_COMMAND,
4255                                   MAKEWPARAM( LOWORD(dw), BN_CLICKED ),
4256                               (LPARAM)GetDlgItem( hwndParent, LOWORD(dw) ) );
4257                 }
4258             }
4259             break;
4260         }
4261         return 0;
4262 }
4263
4264
4265 /*********************************************************************
4266  *
4267  *      WM_KILLFOCUS
4268  *
4269  */
4270 static LRESULT EDIT_WM_KillFocus(HWND hwnd, EDITSTATE *es)
4271 {
4272         es->flags &= ~EF_FOCUSED;
4273         DestroyCaret();
4274         if(!(es->style & ES_NOHIDESEL))
4275                 EDIT_InvalidateText(hwnd, es, es->selection_start, es->selection_end);
4276         EDIT_NOTIFY_PARENT(hwnd, es, EN_KILLFOCUS, "EN_KILLFOCUS");
4277         return 0;
4278 }
4279
4280
4281 /*********************************************************************
4282  *
4283  *      WM_LBUTTONDBLCLK
4284  *
4285  *      The caret position has been set on the WM_LBUTTONDOWN message
4286  *
4287  */
4288 static LRESULT EDIT_WM_LButtonDblClk(HWND hwnd, EDITSTATE *es)
4289 {
4290         INT s;
4291         INT e = es->selection_end;
4292         INT l;
4293         INT li;
4294         INT ll;
4295
4296         if (!(es->flags & EF_FOCUSED))
4297                 return 0;
4298
4299         l = EDIT_EM_LineFromChar(es, e);
4300         li = EDIT_EM_LineIndex(es, l);
4301         ll = EDIT_EM_LineLength(es, e);
4302         s = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_LEFT);
4303         e = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_RIGHT);
4304         EDIT_EM_SetSel(hwnd, es, s, e, FALSE);
4305         EDIT_EM_ScrollCaret(hwnd, es);
4306         return 0;
4307 }
4308
4309
4310 /*********************************************************************
4311  *
4312  *      WM_LBUTTONDOWN
4313  *
4314  */
4315 static LRESULT EDIT_WM_LButtonDown(HWND hwnd, EDITSTATE *es, DWORD keys, INT x, INT y)
4316 {
4317         INT e;
4318         BOOL after_wrap;
4319
4320         if (!(es->flags & EF_FOCUSED))
4321                 return 0;
4322
4323         es->bCaptureState = TRUE;
4324         SetCapture(hwnd);
4325         EDIT_ConfinePoint(es, &x, &y);
4326         e = EDIT_CharFromPos(hwnd, es, x, y, &after_wrap);
4327         EDIT_EM_SetSel(hwnd, es, (keys & MK_SHIFT) ? es->selection_start : e, e, after_wrap);
4328         EDIT_EM_ScrollCaret(hwnd, es);
4329         es->region_posx = es->region_posy = 0;
4330         SetTimer(hwnd, 0, 100, NULL);
4331         return 0;
4332 }
4333
4334
4335 /*********************************************************************
4336  *
4337  *      WM_LBUTTONUP
4338  *
4339  */
4340 static LRESULT EDIT_WM_LButtonUp(HWND hwndSelf, EDITSTATE *es)
4341 {
4342         if (es->bCaptureState && GetCapture() == hwndSelf) {
4343                 KillTimer(hwndSelf, 0);
4344                 ReleaseCapture();
4345         }
4346         es->bCaptureState = FALSE;
4347         return 0;
4348 }
4349
4350
4351 /*********************************************************************
4352  *
4353  *      WM_MBUTTONDOWN
4354  *
4355  */
4356 static LRESULT EDIT_WM_MButtonDown(HWND hwnd)
4357 {
4358     SendMessageW(hwnd,WM_PASTE,0,0);
4359     return 0;
4360 }
4361
4362
4363 /*********************************************************************
4364  *
4365  *      WM_MOUSEMOVE
4366  *
4367  */
4368 static LRESULT EDIT_WM_MouseMove(HWND hwnd, EDITSTATE *es, INT x, INT y)
4369 {
4370         INT e;
4371         BOOL after_wrap;
4372         INT prex, prey;
4373
4374         if (GetCapture() != hwnd)
4375                 return 0;
4376
4377         /*
4378          *      FIXME: gotta do some scrolling if outside client
4379          *              area.  Maybe reset the timer ?
4380          */
4381         prex = x; prey = y;
4382         EDIT_ConfinePoint(es, &x, &y);
4383         es->region_posx = (prex < x) ? -1 : ((prex > x) ? 1 : 0);
4384         es->region_posy = (prey < y) ? -1 : ((prey > y) ? 1 : 0);
4385         e = EDIT_CharFromPos(hwnd, es, x, y, &after_wrap);
4386         EDIT_EM_SetSel(hwnd, es, es->selection_start, e, after_wrap);
4387         return 0;
4388 }
4389
4390
4391 /*********************************************************************
4392  *
4393  *      WM_NCCREATE
4394  *
4395  * See also EDIT_WM_StyleChanged
4396  */
4397 static LRESULT EDIT_WM_NCCreate(HWND hwnd, DWORD style, HWND hwndParent, BOOL unicode)
4398 {
4399         EDITSTATE *es;
4400         UINT alloc_size;
4401
4402         TRACE("Creating %s edit control, style = %08lx\n",
4403                 unicode ? "Unicode" : "ANSI", style);
4404
4405         if (!(es = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*es))))
4406                 return FALSE;
4407         SetWindowLongA( hwnd, 0, (LONG)es );
4408
4409        /*
4410         *      Note: since the EDITSTATE has not been fully initialized yet,
4411         *            we can't use any API calls that may send
4412         *            WM_XXX messages before WM_NCCREATE is completed.
4413         */
4414
4415         es->is_unicode = unicode;
4416         es->style = style;
4417
4418         es->bEnableState = !(style & WS_DISABLED);
4419
4420         /* Save parent, which will be notified by EN_* messages */
4421         es->hwndParent = hwndParent;
4422
4423         if (es->style & ES_COMBO)
4424            es->hwndListBox = GetDlgItem(hwndParent, ID_CB_LISTBOX);
4425
4426         /* Number overrides lowercase overrides uppercase (at least it
4427          * does in Win95).  However I'll bet that ES_NUMBER would be
4428          * invalid under Win 3.1.
4429          */
4430         if (es->style & ES_NUMBER) {
4431                 ; /* do not override the ES_NUMBER */
4432         }  else if (es->style & ES_LOWERCASE) {
4433                 es->style &= ~ES_UPPERCASE;
4434         }
4435         if (es->style & ES_MULTILINE) {
4436                 es->buffer_limit = BUFLIMIT_MULTI;
4437                 if (es->style & WS_VSCROLL)
4438                         es->style |= ES_AUTOVSCROLL;
4439                 if (es->style & WS_HSCROLL)
4440                         es->style |= ES_AUTOHSCROLL;
4441                 es->style &= ~ES_PASSWORD;
4442                 if ((es->style & ES_CENTER) || (es->style & ES_RIGHT)) {
4443                         /* Confirmed - RIGHT overrides CENTER */
4444                         if (es->style & ES_RIGHT)
4445                                 es->style &= ~ES_CENTER;
4446                         es->style &= ~WS_HSCROLL;
4447                         es->style &= ~ES_AUTOHSCROLL;
4448                 }
4449
4450                 /* FIXME: for now, all multi line controls are AUTOVSCROLL */
4451                 es->style |= ES_AUTOVSCROLL;
4452         } else {
4453                 es->buffer_limit = BUFLIMIT_SINGLE;
4454                 if (WIN31_LOOK == TWEAK_WineLook ||
4455                     WIN95_LOOK == TWEAK_WineLook) {
4456                         es->style &= ~ES_CENTER;
4457                         es->style &= ~ES_RIGHT;
4458                 } else {
4459                         if (es->style & ES_RIGHT)
4460                                 es->style &= ~ES_CENTER;
4461                 }
4462                 es->style &= ~WS_HSCROLL;
4463                 es->style &= ~WS_VSCROLL;
4464                 es->style &= ~ES_AUTOVSCROLL;
4465                 es->style &= ~ES_WANTRETURN;
4466                 if (es->style & ES_PASSWORD)
4467                         es->password_char = '*';
4468
4469                 /* FIXME: for now, all single line controls are AUTOHSCROLL */
4470                 es->style |= ES_AUTOHSCROLL;
4471         }
4472
4473         alloc_size = ROUND_TO_GROW((es->buffer_size + 1) * sizeof(WCHAR));
4474         if(!(es->hloc32W = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
4475             return FALSE;
4476         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
4477
4478         if (!(es->undo_text = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (es->buffer_size + 1) * sizeof(WCHAR))))
4479                 return FALSE;
4480         es->undo_buffer_size = es->buffer_size;
4481
4482         if (es->style & ES_MULTILINE)
4483                 if (!(es->first_line_def = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LINEDEF))))
4484                         return FALSE;
4485         es->line_count = 1;
4486
4487         /*
4488          * In Win95 look and feel, the WS_BORDER style is replaced by the
4489          * WS_EX_CLIENTEDGE style for the edit control. This gives the edit
4490          * control a non client area.  Not always.  This coordinates in some
4491          * way with the window creation code in dialog.c  When making
4492          * modifications please ensure that the code still works for edit
4493          * controls created directly with style 0x50800000, exStyle 0 (
4494          * which should have a single pixel border)
4495          */
4496         if (TWEAK_WineLook != WIN31_LOOK)
4497         {
4498           es->style      &= ~WS_BORDER;
4499         }
4500         else
4501         {
4502           if ((es->style & WS_BORDER) && !(es->style & WS_DLGFRAME))
4503               SetWindowLongA( hwnd, GWL_STYLE,
4504                               GetWindowLongA( hwnd, GWL_STYLE ) & ~WS_BORDER );
4505         }
4506
4507         return TRUE;
4508 }
4509
4510 /*********************************************************************
4511  *
4512  *      WM_PAINT
4513  *
4514  */
4515 static void EDIT_WM_Paint(HWND hwnd, EDITSTATE *es, WPARAM wParam)
4516 {
4517         PAINTSTRUCT ps;
4518         INT i;
4519         HDC dc;
4520         HFONT old_font = 0;
4521         RECT rc;
4522         RECT rcLine;
4523         RECT rcRgn;
4524         BOOL rev = es->bEnableState &&
4525                                 ((es->flags & EF_FOCUSED) ||
4526                                         (es->style & ES_NOHIDESEL));
4527         if (!wParam)
4528             dc = BeginPaint(hwnd, &ps);
4529         else
4530             dc = (HDC) wParam;
4531         if(es->style & WS_BORDER) {
4532                 GetClientRect(hwnd, &rc);
4533                 if(es->style & ES_MULTILINE) {
4534                         if(es->style & WS_HSCROLL) rc.bottom++;
4535                         if(es->style & WS_VSCROLL) rc.right++;
4536                 }
4537                 Rectangle(dc, rc.left, rc.top, rc.right, rc.bottom);
4538         }
4539         IntersectClipRect(dc, es->format_rect.left,
4540                                 es->format_rect.top,
4541                                 es->format_rect.right,
4542                                 es->format_rect.bottom);
4543         if (es->style & ES_MULTILINE) {
4544                 GetClientRect(hwnd, &rc);
4545                 IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
4546         }
4547         if (es->font)
4548                 old_font = SelectObject(dc, es->font);
4549         if ( get_app_version() >= 0x40000 &&(
4550                     !es->bEnableState || (es->style & ES_READONLY)))
4551                 EDIT_SEND_CTLCOLORSTATIC(hwnd, dc);
4552         else
4553                 EDIT_SEND_CTLCOLOR(hwnd, dc);
4554
4555         if (!es->bEnableState)
4556                 SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT));
4557         GetClipBox(dc, &rcRgn);
4558         if (es->style & ES_MULTILINE) {
4559                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4560                 for (i = es->y_offset ; i <= min(es->y_offset + vlc, es->y_offset + es->line_count - 1) ; i++) {
4561                         EDIT_GetLineRect(hwnd, es, i, 0, -1, &rcLine);
4562                         if (IntersectRect(&rc, &rcRgn, &rcLine))
4563                                 EDIT_PaintLine(hwnd, es, dc, i, rev);
4564                 }
4565         } else {
4566                 EDIT_GetLineRect(hwnd, es, 0, 0, -1, &rcLine);
4567                 if (IntersectRect(&rc, &rcRgn, &rcLine))
4568                         EDIT_PaintLine(hwnd, es, dc, 0, rev);
4569         }
4570         if (es->font)
4571                 SelectObject(dc, old_font);
4572
4573         if (!wParam)
4574             EndPaint(hwnd, &ps);
4575 }
4576
4577
4578 /*********************************************************************
4579  *
4580  *      WM_PASTE
4581  *
4582  */
4583 static void EDIT_WM_Paste(HWND hwnd, EDITSTATE *es)
4584 {
4585         HGLOBAL hsrc;
4586         LPWSTR src;
4587
4588         /* Protect read-only edit control from modification */
4589         if(es->style & ES_READONLY)
4590             return;
4591
4592         OpenClipboard(hwnd);
4593         if ((hsrc = GetClipboardData(CF_UNICODETEXT))) {
4594                 src = (LPWSTR)GlobalLock(hsrc);
4595                 EDIT_EM_ReplaceSel(hwnd, es, TRUE, src, TRUE);
4596                 GlobalUnlock(hsrc);
4597         }
4598         CloseClipboard();
4599 }
4600
4601
4602 /*********************************************************************
4603  *
4604  *      WM_SETFOCUS
4605  *
4606  */
4607 static void EDIT_WM_SetFocus(HWND hwnd, EDITSTATE *es)
4608 {
4609         es->flags |= EF_FOCUSED;
4610         CreateCaret(hwnd, 0, 2, es->line_height);
4611         EDIT_SetCaretPos(hwnd, es, es->selection_end,
4612                          es->flags & EF_AFTER_WRAP);
4613         if(!(es->style & ES_NOHIDESEL))
4614                 EDIT_InvalidateText(hwnd, es, es->selection_start, es->selection_end);
4615         ShowCaret(hwnd);
4616         EDIT_NOTIFY_PARENT(hwnd, es, EN_SETFOCUS, "EN_SETFOCUS");
4617 }
4618
4619
4620 /*********************************************************************
4621  *
4622  *      WM_SETFONT
4623  *
4624  * With Win95 look the margins are set to default font value unless
4625  * the system font (font == 0) is being set, in which case they are left
4626  * unchanged.
4627  *
4628  */
4629 static void EDIT_WM_SetFont(HWND hwnd, EDITSTATE *es, HFONT font, BOOL redraw)
4630 {
4631         TEXTMETRICW tm;
4632         HDC dc;
4633         HFONT old_font = 0;
4634         RECT r;
4635
4636         es->font = font;
4637         dc = GetDC(hwnd);
4638         if (font)
4639                 old_font = SelectObject(dc, font);
4640         GetTextMetricsW(dc, &tm);
4641         es->line_height = tm.tmHeight;
4642         es->char_width = tm.tmAveCharWidth;
4643         if (font)
4644                 SelectObject(dc, old_font);
4645         ReleaseDC(hwnd, dc);
4646         if (font && (TWEAK_WineLook > WIN31_LOOK))
4647                 EDIT_EM_SetMargins(es, EC_LEFTMARGIN | EC_RIGHTMARGIN,
4648                                    EC_USEFONTINFO, EC_USEFONTINFO);
4649
4650         /* Force the recalculation of the format rect for each font change */
4651         GetClientRect(hwnd, &r);
4652         EDIT_SetRectNP(hwnd, es, &r);
4653
4654         if (es->style & ES_MULTILINE)
4655                 EDIT_BuildLineDefs_ML(hwnd, es, 0, strlenW(es->text), 0, (HRGN)0);
4656         else
4657             EDIT_CalcLineWidth_SL(hwnd, es);
4658
4659         if (redraw)
4660                 EDIT_UpdateText(hwnd, es, NULL, TRUE);
4661         if (es->flags & EF_FOCUSED) {
4662                 DestroyCaret();
4663                 CreateCaret(hwnd, 0, 2, es->line_height);
4664                 EDIT_SetCaretPos(hwnd, es, es->selection_end,
4665                                  es->flags & EF_AFTER_WRAP);
4666                 ShowCaret(hwnd);
4667         }
4668 }
4669
4670
4671 /*********************************************************************
4672  *
4673  *      WM_SETTEXT
4674  *
4675  * NOTES
4676  *  For multiline controls (ES_MULTILINE), reception of WM_SETTEXT triggers:
4677  *  The modified flag is reset. No notifications are sent.
4678  *
4679  *  For single-line controls, reception of WM_SETTEXT triggers:
4680  *  The modified flag is reset. EN_UPDATE and EN_CHANGE notifications are sent.
4681  *
4682  */
4683 static void EDIT_WM_SetText(HWND hwnd, EDITSTATE *es, LPARAM lParam, BOOL unicode)
4684 {
4685     LPWSTR text = NULL;
4686
4687     if(unicode)
4688         text = (LPWSTR)lParam;
4689     else if (lParam)
4690     {
4691         LPCSTR textA = (LPCSTR)lParam;
4692         INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
4693         if((text = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
4694             MultiByteToWideChar(CP_ACP, 0, textA, -1, text, countW);
4695     }
4696
4697         EDIT_EM_SetSel(hwnd, es, 0, (UINT)-1, FALSE);
4698         if (text) {
4699                 TRACE("%s\n", debugstr_w(text));
4700                 EDIT_EM_ReplaceSel(hwnd, es, FALSE, text, FALSE);
4701                 if(!unicode)
4702                     HeapFree(GetProcessHeap(), 0, text);
4703         } else {
4704                 static const WCHAR empty_stringW[] = {0};
4705                 TRACE("<NULL>\n");
4706                 EDIT_EM_ReplaceSel(hwnd, es, FALSE, empty_stringW, FALSE);
4707         }
4708         es->x_offset = 0;
4709         es->flags &= ~EF_MODIFIED;
4710         EDIT_EM_SetSel(hwnd, es, 0, 0, FALSE);
4711         /* Send the notification after the selection start and end have been set
4712          * edit control doesn't send notification on WM_SETTEXT
4713          * if it is multiline, or it is part of combobox
4714          */
4715         if( !((es->style & ES_MULTILINE) || es->hwndListBox))
4716             EDIT_NOTIFY_PARENT(hwnd, es, EN_CHANGE, "EN_CHANGE");
4717         EDIT_EM_ScrollCaret(hwnd, es);
4718 }
4719
4720
4721 /*********************************************************************
4722  *
4723  *      WM_SIZE
4724  *
4725  */
4726 static void EDIT_WM_Size(HWND hwnd, EDITSTATE *es, UINT action, INT width, INT height)
4727 {
4728         if ((action == SIZE_MAXIMIZED) || (action == SIZE_RESTORED)) {
4729                 RECT rc;
4730                 TRACE("width = %d, height = %d\n", width, height);
4731                 SetRect(&rc, 0, 0, width, height);
4732                 EDIT_SetRectNP(hwnd, es, &rc);
4733                 EDIT_UpdateText(hwnd, es, NULL, TRUE);
4734         }
4735 }
4736
4737
4738 /*********************************************************************
4739  *
4740  *      WM_STYLECHANGED
4741  *
4742  * This message is sent by SetWindowLong on having changed either the Style
4743  * or the extended style.
4744  *
4745  * We ensure that the window's version of the styles and the EDITSTATE's agree.
4746  *
4747  * See also EDIT_WM_NCCreate
4748  *
4749  * It appears that the Windows version of the edit control allows the style
4750  * (as retrieved by GetWindowLong) to be any value and maintains an internal
4751  * style variable which will generally be different.  In this function we
4752  * update the internal style based on what changed in the externally visible
4753  * style.
4754  *
4755  * Much of this content as based upon the MSDN, especially:
4756  *  Platform SDK Documentation -> User Interface Services ->
4757  *      Windows User Interface -> Edit Controls -> Edit Control Reference ->
4758  *      Edit Control Styles
4759  */
4760 static LRESULT  EDIT_WM_StyleChanged (HWND hwnd,
4761                                       EDITSTATE *es,
4762                                       WPARAM which,
4763                                       const STYLESTRUCT *style)
4764 {
4765         if (GWL_STYLE == which) {
4766                 DWORD style_change_mask;
4767                 DWORD new_style;
4768                 /* Only a subset of changes can be applied after the control
4769                  * has been created.
4770                  */
4771                 style_change_mask = ES_UPPERCASE | ES_LOWERCASE |
4772                                     ES_NUMBER;
4773                 if (es->style & ES_MULTILINE)
4774                         style_change_mask |= ES_WANTRETURN;
4775
4776                 new_style = style->styleNew & style_change_mask;
4777
4778                 /* Number overrides lowercase overrides uppercase (at least it
4779                  * does in Win95).  However I'll bet that ES_NUMBER would be
4780                  * invalid under Win 3.1.
4781                  */
4782                 if (new_style & ES_NUMBER) {
4783                         ; /* do not override the ES_NUMBER */
4784                 }  else if (new_style & ES_LOWERCASE) {
4785                         new_style &= ~ES_UPPERCASE;
4786                 }
4787
4788                 es->style = (es->style & ~style_change_mask) | new_style;
4789         } else if (GWL_EXSTYLE == which) {
4790                 ; /* FIXME - what is needed here */
4791         } else {
4792                 WARN ("Invalid style change %d\n",which);
4793         }
4794
4795         return 0;
4796 }
4797
4798 /*********************************************************************
4799  *
4800  *      WM_SYSKEYDOWN
4801  *
4802  */
4803 static LRESULT EDIT_WM_SysKeyDown(HWND hwnd, EDITSTATE *es, INT key, DWORD key_data)
4804 {
4805         if ((key == VK_BACK) && (key_data & 0x2000)) {
4806                 if (EDIT_EM_CanUndo(es))
4807                         EDIT_EM_Undo(hwnd, es);
4808                 return 0;
4809         } else if (key == VK_UP || key == VK_DOWN) {
4810                 if (EDIT_CheckCombo(hwnd, es, WM_SYSKEYDOWN, key))
4811                         return 0;
4812         }
4813         return DefWindowProcW(hwnd, WM_SYSKEYDOWN, (WPARAM)key, (LPARAM)key_data);
4814 }
4815
4816
4817 /*********************************************************************
4818  *
4819  *      WM_TIMER
4820  *
4821  */
4822 static void EDIT_WM_Timer(HWND hwnd, EDITSTATE *es)
4823 {
4824         if (es->region_posx < 0) {
4825                 EDIT_MoveBackward(hwnd, es, TRUE);
4826         } else if (es->region_posx > 0) {
4827                 EDIT_MoveForward(hwnd, es, TRUE);
4828         }
4829 /*
4830  *      FIXME: gotta do some vertical scrolling here, like
4831  *              EDIT_EM_LineScroll(hwnd, 0, 1);
4832  */
4833 }
4834
4835 /*********************************************************************
4836  *
4837  *      WM_VSCROLL
4838  *
4839  */
4840 static LRESULT EDIT_WM_VScroll(HWND hwnd, EDITSTATE *es, INT action, INT pos)
4841 {
4842         INT dy;
4843
4844         if (!(es->style & ES_MULTILINE))
4845                 return 0;
4846
4847         if (!(es->style & ES_AUTOVSCROLL))
4848                 return 0;
4849
4850         dy = 0;
4851         switch (action) {
4852         case SB_LINEUP:
4853         case SB_LINEDOWN:
4854         case SB_PAGEUP:
4855         case SB_PAGEDOWN:
4856                 TRACE("action %d\n", action);
4857                 EDIT_EM_Scroll(hwnd, es, action);
4858                 return 0;
4859         case SB_TOP:
4860                 TRACE("SB_TOP\n");
4861                 dy = -es->y_offset;
4862                 break;
4863         case SB_BOTTOM:
4864                 TRACE("SB_BOTTOM\n");
4865                 dy = es->line_count - 1 - es->y_offset;
4866                 break;
4867         case SB_THUMBTRACK:
4868                 TRACE("SB_THUMBTRACK %d\n", pos);
4869                 es->flags |= EF_VSCROLL_TRACK;
4870                 if(es->style & WS_VSCROLL)
4871                     dy = pos - es->y_offset;
4872                 else
4873                 {
4874                     /* Assume default scroll range 0-100 */
4875                     INT vlc, new_y;
4876                     /* Sanity check */
4877                     if(pos < 0 || pos > 100) return 0;
4878                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4879                     new_y = pos * (es->line_count - vlc) / 100;
4880                     dy = es->line_count ? (new_y - es->y_offset) : 0;
4881                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
4882                             es->line_count, es->y_offset, pos, dy);
4883                 }
4884                 break;
4885         case SB_THUMBPOSITION:
4886                 TRACE("SB_THUMBPOSITION %d\n", pos);
4887                 es->flags &= ~EF_VSCROLL_TRACK;
4888                 if(es->style & WS_VSCROLL)
4889                     dy = pos - es->y_offset;
4890                 else
4891                 {
4892                     /* Assume default scroll range 0-100 */
4893                     INT vlc, new_y;
4894                     /* Sanity check */
4895                     if(pos < 0 || pos > 100) return 0;
4896                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4897                     new_y = pos * (es->line_count - vlc) / 100;
4898                     dy = es->line_count ? (new_y - es->y_offset) : 0;
4899                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
4900                             es->line_count, es->y_offset, pos, dy);
4901                 }
4902                 if (!dy)
4903                 {
4904                         /* force scroll info update */
4905                         EDIT_UpdateScrollInfo(hwnd, es);
4906                         EDIT_NOTIFY_PARENT(hwnd, es, EN_VSCROLL, "EN_VSCROLL");
4907                 }
4908                 break;
4909         case SB_ENDSCROLL:
4910                 TRACE("SB_ENDSCROLL\n");
4911                 break;
4912         /*
4913          *      FIXME : the next two are undocumented !
4914          *      Are we doing the right thing ?
4915          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
4916          *      although it's also a regular control message.
4917          */
4918         case EM_GETTHUMB: /* this one is used by NT notepad */
4919         case EM_GETTHUMB16:
4920         {
4921                 LRESULT ret;
4922                 if(GetWindowLongA( hwnd, GWL_STYLE ) & WS_VSCROLL)
4923                     ret = GetScrollPos(hwnd, SB_VERT);
4924                 else
4925                 {
4926                     /* Assume default scroll range 0-100 */
4927                     INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4928                     ret = es->line_count ? es->y_offset * 100 / (es->line_count - vlc) : 0;
4929                 }
4930                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
4931                 return ret;
4932         }
4933         case EM_LINESCROLL16:
4934                 TRACE("EM_LINESCROLL16 %d\n", pos);
4935                 dy = pos;
4936                 break;
4937
4938         default:
4939                 ERR("undocumented WM_VSCROLL action %d (0x%04x), please report\n",
4940                     action, action);
4941                 return 0;
4942         }
4943         if (dy)
4944                 EDIT_EM_LineScroll(hwnd, es, 0, dy);
4945         return 0;
4946 }
4947
4948 /*********************************************************************
4949  *
4950  *      EDIT_UpdateText
4951  *
4952  */
4953 static void EDIT_UpdateTextRegion(HWND hwnd, EDITSTATE *es, HRGN hrgn, BOOL bErase)
4954 {
4955     if (es->flags & EF_UPDATE) EDIT_NOTIFY_PARENT(hwnd, es, EN_UPDATE, "EN_UPDATE");
4956     InvalidateRgn(hwnd, hrgn, bErase);
4957 }
4958
4959
4960 /*********************************************************************
4961  *
4962  *      EDIT_UpdateText
4963  *
4964  */
4965 static void EDIT_UpdateText(HWND hwnd, EDITSTATE *es, LPRECT rc, BOOL bErase)
4966 {
4967     if (es->flags & EF_UPDATE) EDIT_NOTIFY_PARENT(hwnd, es, EN_UPDATE, "EN_UPDATE");
4968     InvalidateRect(hwnd, rc, bErase);
4969 }