controls/edit.c

   1 /*
   2  *      Edit control
   3  *
   4  *      Copyright  David W. Metcalfe, 1994
   5  *      Copyright  William Magro, 1995, 1996
   6  *      Copyright  Frans van Dorsselaer, 1996, 1997
   7  *
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * TODO:
  24  *   - ES_CENTER
  25  *   - ES_RIGHT
  26  *   - ES_NUMBER (new since win95)
  27  *   - ES_OEMCONVERT
  28  *   -!ES_AUTOVSCROLL (every multi line control *is* auto vscroll)
  29  *   -!ES_AUTOHSCROLL (every single line control *is* auto hscroll)
  30  *
  31  * When there is no autoscrolling, the control should first check whether
  32  * the new text would fit.  If not, an EN_MAXTEXT should be sent.
  33  * However, currently this would require the actual change to be made,
  34  * then call EDIT_BuildLineDefs() and then find out that the new text doesn't
  35  * fit.  After all this, things should be put back in the state before the
  36  * changes. Note that for multi line controls !ES_AUTOHSCROLL works : wordwrap.
  37  *
  38  */
  39
  40 #include "config.h"
  41
  42 #include <stdarg.h>
  43 #include <string.h>
  44 #include <stdlib.h>
  45
  46 #include "windef.h"
  47 #include "winbase.h"
  48 #include "winnt.h"
  49 #include "wownt32.h"
  50 #include "win.h"
  51 #include "wine/winbase16.h"
  52 #include "wine/winuser16.h"
  53 #include "wine/unicode.h"
  54 #include "controls.h"
  55 #include "local.h"
  56 #include "user.h"
  57 #include "wine/debug.h"
  58
  59 WINE_DEFAULT_DEBUG_CHANNEL(edit);
  60 WINE_DECLARE_DEBUG_CHANNEL(combo);
  61 WINE_DECLARE_DEBUG_CHANNEL(relay);
  62
  63 #define BUFLIMIT_MULTI          65534   /* maximum buffer size (not including '\0')
  64                                            FIXME: BTW, new specs say 65535 (do you dare ???) */
  65 #define BUFLIMIT_SINGLE         32766   /* maximum buffer size (not including '\0') */
  66 #define GROWLENGTH              32      /* buffers granularity in bytes: must be power of 2 */
  67 #define ROUND_TO_GROW(size)     (((size) + (GROWLENGTH - 1)) & ~(GROWLENGTH - 1))
  68 #define HSCROLL_FRACTION        3       /* scroll window by 1/3 width */
  69
  70 /*
  71  *      extra flags for EDITSTATE.flags field
  72  */
  73 #define EF_MODIFIED             0x0001  /* text has been modified */
  74 #define EF_FOCUSED              0x0002  /* we have input focus */
  75 #define EF_UPDATE               0x0004  /* notify parent of changed state */
  76 #define EF_VSCROLL_TRACK        0x0008  /* don't SetScrollPos() since we are tracking the thumb */
  77 #define EF_HSCROLL_TRACK        0x0010  /* don't SetScrollPos() since we are tracking the thumb */
  78 #define EF_AFTER_WRAP           0x0080  /* the caret is displayed after the last character of a
  79                                            wrapped line, instead of in front of the next character */
  80 #define EF_USE_SOFTBRK          0x0100  /* Enable soft breaks in text. */
  81
  82 typedef enum
  83 {
  84         END_0 = 0,                      /* line ends with terminating '\0' character */
  85         END_WRAP,                       /* line is wrapped */
  86         END_HARD,                       /* line ends with a hard return '\r\n' */
  87         END_SOFT,                       /* line ends with a soft return '\r\r\n' */
  88         END_RICH                        /* line ends with a single '\n' */
  89 } LINE_END;
  90
  91 typedef struct tagLINEDEF {
  92         INT length;                     /* bruto length of a line in bytes */
  93         INT net_length;                 /* netto length of a line in visible characters */
  94         LINE_END ending;
  95         INT width;                      /* width of the line in pixels */
  96         INT index;                      /* line index into the buffer */
  97         struct tagLINEDEF *next;
  98 } LINEDEF;
  99
 100 typedef struct
 101 {
 102         BOOL is_unicode;                /* how the control was created */
 103         LPWSTR text;                    /* the actual contents of the control */
 104         UINT buffer_size;               /* the size of the buffer in characters */
 105         UINT buffer_limit;              /* the maximum size to which the buffer may grow in characters */
 106         HFONT font;                     /* NULL means standard system font */
 107         INT x_offset;                   /* scroll offset        for multi lines this is in pixels
 108                                                                 for single lines it's in characters */
 109         INT line_height;                /* height of a screen line in pixels */
 110         INT char_width;                 /* average character width in pixels */
 111         DWORD style;                    /* sane version of wnd->dwStyle */
 112         WORD flags;                     /* flags that are not in es->style or wnd->flags (EF_XXX) */
 113         INT undo_insert_count;          /* number of characters inserted in sequence */
 114         UINT undo_position;             /* character index of the insertion and deletion */
 115         LPWSTR undo_text;               /* deleted text */
 116         UINT undo_buffer_size;          /* size of the deleted text buffer */
 117         INT selection_start;            /* == selection_end if no selection */
 118         INT selection_end;              /* == current caret position */
 119         WCHAR password_char;            /* == 0 if no password char, and for multi line controls */
 120         INT left_margin;                /* in pixels */
 121         INT right_margin;               /* in pixels */
 122         RECT format_rect;
 123         INT text_width;                 /* width of the widest line in pixels for multi line controls
 124                                            and just line width for single line controls */
 125         INT region_posx;                /* Position of cursor relative to region: */
 126         INT region_posy;                /* -1: to left, 0: within, 1: to right */
 127         EDITWORDBREAKPROC16 word_break_proc16;
 128         void *word_break_proc;          /* 32-bit word break proc: ANSI or Unicode */
 129         INT line_count;                 /* number of lines */
 130         INT y_offset;                   /* scroll offset in number of lines */
 131         BOOL bCaptureState;             /* flag indicating whether mouse was captured */
 132         BOOL bEnableState;              /* flag keeping the enable state */
 133         HWND hwndSelf;                  /* the our window handle */
 134         HWND hwndParent;                /* Handle of parent for sending EN_* messages.
 135                                            Even if parent will change, EN_* messages
 136                                            should be sent to the first parent. */
 137         HWND hwndListBox;               /* handle of ComboBox's listbox or NULL */
 138         /*
 139          *      only for multi line controls
 140          */
 141         INT lock_count;                 /* amount of re-entries in the EditWndProc */
 142         INT tabs_count;
 143         LPINT tabs;
 144         LINEDEF *first_line_def;        /* linked list of (soft) linebreaks */
 145         HLOCAL hloc32W;                 /* our unicode local memory block */
 146         HLOCAL16 hloc16;                /* alias for 16-bit control receiving EM_GETHANDLE16
 147                                            or EM_SETHANDLE16 */
 148         HLOCAL hloc32A;                 /* alias for ANSI control receiving EM_GETHANDLE
 149                                            or EM_SETHANDLE */
 150 } EDITSTATE;
 151
 152
 153 #define SWAP_UINT32(x,y) do { UINT temp = (UINT)(x); (x) = (UINT)(y); (y) = temp; } while(0)
 154 #define ORDER_UINT(x,y) do { if ((UINT)(y) < (UINT)(x)) SWAP_UINT32((x),(y)); } while(0)
 155
 156 /* used for disabled or read-only edit control */
 157 #define EDIT_NOTIFY_PARENT(es, wNotifyCode, str) \
 158         do \
 159         { /* Notify parent which has created this edit control */ \
 160             TRACE("notification " str " sent to hwnd=%p\n", es->hwndParent); \
 161             SendMessageW(es->hwndParent, WM_COMMAND, \
 162                      MAKEWPARAM(GetWindowLongW((es->hwndSelf),GWL_ID), wNotifyCode), \
 163                      (LPARAM)(es->hwndSelf)); \
 164         } while(0)
 165
 166 /*********************************************************************
 167  *
 168  *      Declarations
 169  *
 170  */
 171
 172 /*
 173  *      These functions have trivial implementations
 174  *      We still like to call them internally
 175  *      "static inline" makes them more like macro's
 176  */
 177 static inline BOOL      EDIT_EM_CanUndo(EDITSTATE *es);
 178 static inline void      EDIT_EM_EmptyUndoBuffer(EDITSTATE *es);
 179 static inline void      EDIT_WM_Clear(EDITSTATE *es);
 180 static inline void      EDIT_WM_Cut(EDITSTATE *es);
 181
 182 /*
 183  *      Helper functions only valid for one type of control
 184  */
 185 static void     EDIT_BuildLineDefs_ML(EDITSTATE *es, INT iStart, INT iEnd, INT delta, HRGN hrgn);
 186 static void     EDIT_CalcLineWidth_SL(EDITSTATE *es);
 187 static LPWSTR   EDIT_GetPasswordPointer_SL(EDITSTATE *es);
 188 static void     EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend);
 189 static void     EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend);
 190 static void     EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend);
 191 static void     EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend);
 192 /*
 193  *      Helper functions valid for both single line _and_ multi line controls
 194  */
 195 static INT      EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action);
 196 static INT      EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap);
 197 static void     EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y);
 198 static void     EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc);
 199 static void     EDIT_InvalidateText(EDITSTATE *es, INT start, INT end);
 200 static void     EDIT_LockBuffer(EDITSTATE *es);
 201 static BOOL     EDIT_MakeFit(EDITSTATE *es, UINT size, BOOL honor_limit);
 202 static BOOL     EDIT_MakeUndoFit(EDITSTATE *es, UINT size);
 203 static void     EDIT_MoveBackward(EDITSTATE *es, BOOL extend);
 204 static void     EDIT_MoveEnd(EDITSTATE *es, BOOL extend);
 205 static void     EDIT_MoveForward(EDITSTATE *es, BOOL extend);
 206 static void     EDIT_MoveHome(EDITSTATE *es, BOOL extend);
 207 static void     EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend);
 208 static void     EDIT_MoveWordForward(EDITSTATE *es, BOOL extend);
 209 static void     EDIT_PaintLine(EDITSTATE *es, HDC hdc, INT line, BOOL rev);
 210 static INT      EDIT_PaintText(EDITSTATE *es, HDC hdc, INT x, INT y, INT line, INT col, INT count, BOOL rev);
 211 static void     EDIT_SetCaretPos(EDITSTATE *es, INT pos, BOOL after_wrap);
 212 static void     EDIT_SetRectNP(EDITSTATE *es, LPRECT lprc);
 213 static void     EDIT_UnlockBuffer(EDITSTATE *es, BOOL force);
 214 static void     EDIT_UpdateScrollInfo(EDITSTATE *es);
 215 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action);
 216 /*
 217  *      EM_XXX message handlers
 218  */
 219 static LRESULT  EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y);
 220 static BOOL     EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol);
 221 static HLOCAL   EDIT_EM_GetHandle(EDITSTATE *es);
 222 static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es);
 223 static INT      EDIT_EM_GetLine(EDITSTATE *es, INT line, LPARAM lParam, BOOL unicode);
 224 static LRESULT  EDIT_EM_GetSel(EDITSTATE *es, PUINT start, PUINT end);
 225 static LRESULT  EDIT_EM_GetThumb(EDITSTATE *es);
 226 static INT      EDIT_EM_LineFromChar(EDITSTATE *es, INT index);
 227 static INT      EDIT_EM_LineIndex(EDITSTATE *es, INT line);
 228 static INT      EDIT_EM_LineLength(EDITSTATE *es, INT index);
 229 static BOOL     EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy);
 230 static BOOL     EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy);
 231 static LRESULT  EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap);
 232 static void     EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit);
 233 static LRESULT  EDIT_EM_Scroll(EDITSTATE *es, INT action);
 234 static void     EDIT_EM_ScrollCaret(EDITSTATE *es);
 235 static void     EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc);
 236 static void     EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc);
 237 static void     EDIT_EM_SetLimitText(EDITSTATE *es, INT limit);
 238 static void     EDIT_EM_SetMargins(EDITSTATE *es, INT action, INT left, INT right);
 239 static void     EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c);
 240 static void     EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap);
 241 static BOOL     EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs);
 242 static BOOL     EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs);
 243 static void     EDIT_EM_SetWordBreakProc(EDITSTATE *es, LPARAM lParam);
 244 static void     EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp);
 245 static BOOL     EDIT_EM_Undo(EDITSTATE *es);
 246 /*
 247  *      WM_XXX message handlers
 248  */
 249 static void     EDIT_WM_Char(EDITSTATE *es, WCHAR c);
 250 static void     EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND conrtol);
 251 static void     EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y);
 252 static void     EDIT_WM_Copy(EDITSTATE *es);
 253 static LRESULT  EDIT_WM_Create(EDITSTATE *es, LPCWSTR name);
 254 static LRESULT  EDIT_WM_Destroy(EDITSTATE *es);
 255 static LRESULT  EDIT_WM_EraseBkGnd(EDITSTATE *es, HDC dc);
 256 static INT      EDIT_WM_GetText(EDITSTATE *es, INT count, LPARAM lParam, BOOL unicode);
 257 static LRESULT  EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos);
 258 static LRESULT  EDIT_WM_KeyDown(EDITSTATE *es, INT key);
 259 static LRESULT  EDIT_WM_KillFocus(EDITSTATE *es);
 260 static LRESULT  EDIT_WM_LButtonDblClk(EDITSTATE *es);
 261 static LRESULT  EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y);
 262 static LRESULT  EDIT_WM_LButtonUp(EDITSTATE *es);
 263 static LRESULT  EDIT_WM_MButtonDown(EDITSTATE *es);
 264 static LRESULT  EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y);
 265 static LRESULT  EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode);
 266 static void     EDIT_WM_Paint(EDITSTATE *es, WPARAM wParam);
 267 static void     EDIT_WM_Paste(EDITSTATE *es);
 268 static void     EDIT_WM_SetFocus(EDITSTATE *es);
 269 static void     EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw);
 270 static void     EDIT_WM_SetText(EDITSTATE *es, LPARAM lParam, BOOL unicode);
 271 static void     EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height);
 272 static LRESULT  EDIT_WM_StyleChanged(EDITSTATE *es, WPARAM which, const STYLESTRUCT *style);
 273 static LRESULT  EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data);
 274 static void     EDIT_WM_Timer(EDITSTATE *es);
 275 static LRESULT  EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos);
 276 static void     EDIT_UpdateText(EDITSTATE *es, LPRECT rc, BOOL bErase);
 277 static void     EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase);
 278
 279 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 280 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 281
 282 /*********************************************************************
 283  * edit class descriptor
 284  */
 285 const struct builtin_class_descr EDIT_builtin_class =
 286 {
 287     "Edit",               /* name */
 288     CS_GLOBALCLASS | CS_DBLCLKS | CS_PARENTDC,   /* style */
 289     EditWndProcA,         /* procA */
 290     EditWndProcW,         /* procW */
 291     sizeof(EDITSTATE *),  /* extra */
 292     IDC_IBEAM,            /* cursor */
 293     0                     /* brush */
 294 };
 295
 296
 297 /*********************************************************************
 298  *
 299  *      EM_CANUNDO
 300  *
 301  */
 302 static inline BOOL EDIT_EM_CanUndo(EDITSTATE *es)
 303 {
 304         return (es->undo_insert_count || strlenW(es->undo_text));
 305 }
 306
 307
 308 /*********************************************************************
 309  *
 310  *      EM_EMPTYUNDOBUFFER
 311  *
 312  */
 313 static inline void EDIT_EM_EmptyUndoBuffer(EDITSTATE *es)
 314 {
 315         es->undo_insert_count = 0;
 316         *es->undo_text = '\0';
 317 }
 318
 319
 320 /*********************************************************************
 321  *
 322  *      WM_CLEAR
 323  *
 324  */
 325 static inline void EDIT_WM_Clear(EDITSTATE *es)
 326 {
 327         static const WCHAR empty_stringW[] = {0};
 328
 329         /* Protect read-only edit control from modification */
 330         if(es->style & ES_READONLY)
 331             return;
 332
 333         EDIT_EM_ReplaceSel(es, TRUE, empty_stringW, TRUE, TRUE);
 334 }
 335
 336
 337 /*********************************************************************
 338  *
 339  *      WM_CUT
 340  *
 341  */
 342 static inline void EDIT_WM_Cut(EDITSTATE *es)
 343 {
 344         EDIT_WM_Copy(es);
 345         EDIT_WM_Clear(es);
 346 }
 347
 348
 349 /**********************************************************************
 350  *         get_app_version
 351  *
 352  * Returns the window version in case Wine emulates a later version
 353  * of windows than the application expects.
 354  *
 355  * In a number of cases when windows runs an application that was
 356  * designed for an earlier windows version, windows reverts
 357  * to "old" behaviour of that earlier version.
 358  *
 359  * An example is a disabled  edit control that needs to be painted.
 360  * Old style behaviour is to send a WM_CTLCOLOREDIT message. This was
 361  * changed in Win95, NT4.0 by a WM_CTLCOLORSTATIC message _only_ for
 362  * applications with an expected version 0f 4.0 or higher.
 363  *
 364  */
 365 static DWORD get_app_version(void)
 366 {
 367     static DWORD version;
 368     if (!version)
 369     {
 370         DWORD dwEmulatedVersion;
 371         OSVERSIONINFOW info;
 372         DWORD dwProcVersion = GetProcessVersion(0);
 373
 374         info.dwOSVersionInfoSize = sizeof(OSVERSIONINFOW);
 375         GetVersionExW( &info );
 376         dwEmulatedVersion = MAKELONG( info.dwMinorVersion, info.dwMajorVersion );
 377         /* FIXME: this may not be 100% correct; see discussion on the
 378          * wine developer list in Nov 1999 */
 379         version = dwProcVersion < dwEmulatedVersion ? dwProcVersion : dwEmulatedVersion;
 380     }
 381     return version;
 382 }
 383
 384
 385 static HBRUSH EDIT_NotifyCtlColor(EDITSTATE *es, HDC hdc)
 386 {
 387         UINT msg;
 388
 389         if ( get_app_version() >= 0x40000 && (!es->bEnableState || (es->style & ES_READONLY)))
 390                 msg = WM_CTLCOLORSTATIC;
 391         else
 392                 msg = WM_CTLCOLOREDIT;
 393
 394         /* why do we notify to es->hwndParent, and we send this one to GetParent()? */
 395         return (HBRUSH)SendMessageW(GetParent(es->hwndSelf), msg, (WPARAM)hdc, (LPARAM)es->hwndSelf);
 396 }
 397
 398 static inline LRESULT DefWindowProcT(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam, BOOL unicode)
 399 {
 400         if(unicode)
 401                 return DefWindowProcW(hwnd, msg, wParam, lParam);
 402         else
 403                 return DefWindowProcA(hwnd, msg, wParam, lParam);
 404 }
 405
 406 /*********************************************************************
 407  *
 408  *      EditWndProc_common
 409  *
 410  *      The messages are in the order of the actual integer values
 411  *      (which can be found in include/windows.h)
 412  *      Wherever possible the 16 bit versions are converted to
 413  *      the 32 bit ones, so that we can 'fall through' to the
 414  *      helper functions.  These are mostly 32 bit (with a few
 415  *      exceptions, clearly indicated by a '16' extension to their
 416  *      names).
 417  *
 418  */
 419 static LRESULT WINAPI EditWndProc_common( HWND hwnd, UINT msg,
 420                                           WPARAM wParam, LPARAM lParam, BOOL unicode )
 421 {
 422         EDITSTATE *es = (EDITSTATE *)GetWindowLongW( hwnd, 0 );
 423         LRESULT result = 0;
 424
 425         TRACE("hwnd=%p msg=%x wparam=%x lparam=%lx\n", hwnd, msg, wParam, lParam);
 426
 427         if (!es && msg != WM_NCCREATE)
 428                 return DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
 429         else if (msg == WM_NCCREATE)
 430                 return EDIT_WM_NCCreate(hwnd, (LPCREATESTRUCTW)lParam, unicode);
 431         else if (msg == WM_DESTROY)
 432                 return EDIT_WM_Destroy(es);
 433
 434
 435         if (es) EDIT_LockBuffer(es);
 436
 437         switch (msg) {
 438         case EM_GETSEL16:
 439                 wParam = 0;
 440                 lParam = 0;
 441                 /* fall through */
 442         case EM_GETSEL:
 443                 result = EDIT_EM_GetSel(es, (PUINT)wParam, (PUINT)lParam);
 444                 break;
 445
 446         case EM_SETSEL16:
 447                 if ((short)LOWORD(lParam) == -1)
 448                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
 449                 else
 450                         EDIT_EM_SetSel(es, LOWORD(lParam), HIWORD(lParam), FALSE);
 451                 if (!wParam)
 452                         EDIT_EM_ScrollCaret(es);
 453                 result = 1;
 454                 break;
 455         case EM_SETSEL:
 456                 EDIT_EM_SetSel(es, wParam, lParam, FALSE);
 457                 EDIT_EM_ScrollCaret(es);
 458                 result = 1;
 459                 break;
 460
 461         case EM_GETRECT16:
 462                 if (lParam)
 463                         CONV_RECT32TO16(&es->format_rect, MapSL(lParam));
 464                 break;
 465         case EM_GETRECT:
 466                 if (lParam)
 467                         CopyRect((LPRECT)lParam, &es->format_rect);
 468                 break;
 469
 470         case EM_SETRECT16:
 471                 if ((es->style & ES_MULTILINE) && lParam) {
 472                         RECT rc;
 473                         CONV_RECT16TO32(MapSL(lParam), &rc);
 474                         EDIT_SetRectNP(es, &rc);
 475                         EDIT_UpdateText(es, NULL, TRUE);
 476                 }
 477                 break;
 478         case EM_SETRECT:
 479                 if ((es->style & ES_MULTILINE) && lParam) {
 480                         EDIT_SetRectNP(es, (LPRECT)lParam);
 481                         EDIT_UpdateText(es, NULL, TRUE);
 482                 }
 483                 break;
 484
 485         case EM_SETRECTNP16:
 486                 if ((es->style & ES_MULTILINE) && lParam) {
 487                         RECT rc;
 488                         CONV_RECT16TO32(MapSL(lParam), &rc);
 489                         EDIT_SetRectNP(es, &rc);
 490                 }
 491                 break;
 492         case EM_SETRECTNP:
 493                 if ((es->style & ES_MULTILINE) && lParam)
 494                         EDIT_SetRectNP(es, (LPRECT)lParam);
 495                 break;
 496
 497         case EM_SCROLL16:
 498         case EM_SCROLL:
 499                 result = EDIT_EM_Scroll(es, (INT)wParam);
 500                 break;
 501
 502         case EM_LINESCROLL16:
 503                 wParam = (WPARAM)(INT)(SHORT)HIWORD(lParam);
 504                 lParam = (LPARAM)(INT)(SHORT)LOWORD(lParam);
 505                 /* fall through */
 506         case EM_LINESCROLL:
 507                 result = (LRESULT)EDIT_EM_LineScroll(es, (INT)wParam, (INT)lParam);
 508                 break;
 509
 510         case EM_SCROLLCARET16:
 511         case EM_SCROLLCARET:
 512                 EDIT_EM_ScrollCaret(es);
 513                 result = 1;
 514                 break;
 515
 516         case EM_GETMODIFY16:
 517         case EM_GETMODIFY:
 518                 result = ((es->flags & EF_MODIFIED) != 0);
 519                 break;
 520
 521         case EM_SETMODIFY16:
 522         case EM_SETMODIFY:
 523                 if (wParam)
 524                         es->flags |= EF_MODIFIED;
 525                 else
 526                         es->flags &= ~(EF_MODIFIED | EF_UPDATE);  /* reset pending updates */
 527                 break;
 528
 529         case EM_GETLINECOUNT16:
 530         case EM_GETLINECOUNT:
 531                 result = (es->style & ES_MULTILINE) ? es->line_count : 1;
 532                 break;
 533
 534         case EM_LINEINDEX16:
 535                 if ((INT16)wParam == -1)
 536                         wParam = (WPARAM)-1;
 537                 /* fall through */
 538         case EM_LINEINDEX:
 539                 result = (LRESULT)EDIT_EM_LineIndex(es, (INT)wParam);
 540                 break;
 541
 542         case EM_SETHANDLE16:
 543                 EDIT_EM_SetHandle16(es, (HLOCAL16)wParam);
 544                 break;
 545         case EM_SETHANDLE:
 546                 EDIT_EM_SetHandle(es, (HLOCAL)wParam);
 547                 break;
 548
 549         case EM_GETHANDLE16:
 550                 result = (LRESULT)EDIT_EM_GetHandle16(es);
 551                 break;
 552         case EM_GETHANDLE:
 553                 result = (LRESULT)EDIT_EM_GetHandle(es);
 554                 break;
 555
 556         case EM_GETTHUMB16:
 557         case EM_GETTHUMB:
 558                 result = EDIT_EM_GetThumb(es);
 559                 break;
 560
 561         /* these messages missing from specs */
 562         case WM_USER+15:
 563         case 0x00bf:
 564         case WM_USER+16:
 565         case 0x00c0:
 566         case WM_USER+19:
 567         case 0x00c3:
 568         case WM_USER+26:
 569         case 0x00ca:
 570                 FIXME("undocumented message 0x%x, please report\n", msg);
 571                 result = DefWindowProcW(hwnd, msg, wParam, lParam);
 572                 break;
 573
 574         case EM_LINELENGTH16:
 575         case EM_LINELENGTH:
 576                 result = (LRESULT)EDIT_EM_LineLength(es, (INT)wParam);
 577                 break;
 578
 579         case EM_REPLACESEL16:
 580                 lParam = (LPARAM)MapSL(lParam);
 581                 unicode = FALSE;  /* 16-bit message is always ascii */
 582                 /* fall through */
 583         case EM_REPLACESEL:
 584         {
 585                 LPWSTR textW;
 586
 587                 if(unicode)
 588                     textW = (LPWSTR)lParam;
 589                 else
 590                 {
 591                     LPSTR textA = (LPSTR)lParam;
 592                     INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
 593                     if((textW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 594                         MultiByteToWideChar(CP_ACP, 0, textA, -1, textW, countW);
 595                 }
 596
 597                 EDIT_EM_ReplaceSel(es, (BOOL)wParam, textW, TRUE, TRUE);
 598                 result = 1;
 599
 600                 if(!unicode)
 601                     HeapFree(GetProcessHeap(), 0, textW);
 602                 break;
 603         }
 604
 605         case EM_GETLINE16:
 606                 lParam = (LPARAM)MapSL(lParam);
 607                 unicode = FALSE;  /* 16-bit message is always ascii */
 608                 /* fall through */
 609         case EM_GETLINE:
 610                 result = (LRESULT)EDIT_EM_GetLine(es, (INT)wParam, lParam, unicode);
 611                 break;
 612
 613         case EM_LIMITTEXT16:
 614         case EM_SETLIMITTEXT:
 615                 EDIT_EM_SetLimitText(es, (INT)wParam);
 616                 break;
 617
 618         case EM_CANUNDO16:
 619         case EM_CANUNDO:
 620                 result = (LRESULT)EDIT_EM_CanUndo(es);
 621                 break;
 622
 623         case EM_UNDO16:
 624         case EM_UNDO:
 625         case WM_UNDO:
 626                 result = (LRESULT)EDIT_EM_Undo(es);
 627                 break;
 628
 629         case EM_FMTLINES16:
 630         case EM_FMTLINES:
 631                 result = (LRESULT)EDIT_EM_FmtLines(es, (BOOL)wParam);
 632                 break;
 633
 634         case EM_LINEFROMCHAR16:
 635         case EM_LINEFROMCHAR:
 636                 result = (LRESULT)EDIT_EM_LineFromChar(es, (INT)wParam);
 637                 break;
 638
 639         case EM_SETTABSTOPS16:
 640                 result = (LRESULT)EDIT_EM_SetTabStops16(es, (INT)wParam, MapSL(lParam));
 641                 break;
 642         case EM_SETTABSTOPS:
 643                 result = (LRESULT)EDIT_EM_SetTabStops(es, (INT)wParam, (LPINT)lParam);
 644                 break;
 645
 646         case EM_SETPASSWORDCHAR16:
 647                 unicode = FALSE;  /* 16-bit message is always ascii */
 648                 /* fall through */
 649         case EM_SETPASSWORDCHAR:
 650         {
 651                 WCHAR charW = 0;
 652
 653                 if(unicode)
 654                     charW = (WCHAR)wParam;
 655                 else
 656                 {
 657                     CHAR charA = wParam;
 658                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 659                 }
 660
 661                 EDIT_EM_SetPasswordChar(es, charW);
 662                 break;
 663         }
 664
 665         case EM_EMPTYUNDOBUFFER16:
 666         case EM_EMPTYUNDOBUFFER:
 667                 EDIT_EM_EmptyUndoBuffer(es);
 668                 break;
 669
 670         case EM_GETFIRSTVISIBLELINE16:
 671                 result = es->y_offset;
 672                 break;
 673         case EM_GETFIRSTVISIBLELINE:
 674                 result = (es->style & ES_MULTILINE) ? es->y_offset : es->x_offset;
 675                 break;
 676
 677         case EM_SETREADONLY16:
 678         case EM_SETREADONLY:
 679                 if (wParam) {
 680                     SetWindowLongW( hwnd, GWL_STYLE,
 681                                     GetWindowLongW( hwnd, GWL_STYLE ) | ES_READONLY );
 682                     es->style |= ES_READONLY;
 683                 } else {
 684                     SetWindowLongW( hwnd, GWL_STYLE,
 685                                     GetWindowLongW( hwnd, GWL_STYLE ) & ~ES_READONLY );
 686                     es->style &= ~ES_READONLY;
 687                 }
 688                 result = 1;
 689                 break;
 690
 691         case EM_SETWORDBREAKPROC16:
 692                 EDIT_EM_SetWordBreakProc16(es, (EDITWORDBREAKPROC16)lParam);
 693                 break;
 694         case EM_SETWORDBREAKPROC:
 695                 EDIT_EM_SetWordBreakProc(es, lParam);
 696                 break;
 697
 698         case EM_GETWORDBREAKPROC16:
 699                 result = (LRESULT)es->word_break_proc16;
 700                 break;
 701         case EM_GETWORDBREAKPROC:
 702                 result = (LRESULT)es->word_break_proc;
 703                 break;
 704
 705         case EM_GETPASSWORDCHAR16:
 706                 unicode = FALSE;  /* 16-bit message is always ascii */
 707                 /* fall through */
 708         case EM_GETPASSWORDCHAR:
 709         {
 710                 if(unicode)
 711                     result = es->password_char;
 712                 else
 713                 {
 714                     WCHAR charW = es->password_char;
 715                     CHAR charA = 0;
 716                     WideCharToMultiByte(CP_ACP, 0, &charW, 1, &charA, 1, NULL, NULL);
 717                     result = charA;
 718                 }
 719                 break;
 720         }
 721
 722         /* The following EM_xxx are new to win95 and don't exist for 16 bit */
 723
 724         case EM_SETMARGINS:
 725                 EDIT_EM_SetMargins(es, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
 726                 break;
 727
 728         case EM_GETMARGINS:
 729                 result = MAKELONG(es->left_margin, es->right_margin);
 730                 break;
 731
 732         case EM_GETLIMITTEXT:
 733                 result = es->buffer_limit;
 734                 break;
 735
 736         case EM_POSFROMCHAR:
 737                 result = EDIT_EM_PosFromChar(es, (INT)wParam, FALSE);
 738                 break;
 739
 740         case EM_CHARFROMPOS:
 741                 result = EDIT_EM_CharFromPos(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
 742                 break;
 743
 744         /* End of the EM_ messages which were in numerical order; what order
 745          * are these in?  vaguely alphabetical?
 746          */
 747
 748         case WM_GETDLGCODE:
 749                 result = DLGC_HASSETSEL | DLGC_WANTCHARS | DLGC_WANTARROWS;
 750
 751                 if (lParam && (((LPMSG)lParam)->message == WM_KEYDOWN))
 752                 {
 753                    int vk = (int)((LPMSG)lParam)->wParam;
 754
 755                    if (vk == VK_RETURN && (GetWindowLongW( hwnd, GWL_STYLE ) & ES_WANTRETURN))
 756                    {
 757                       result |= DLGC_WANTMESSAGE;
 758                    }
 759                    else if (es->hwndListBox && (vk == VK_RETURN || vk == VK_ESCAPE))
 760                    {
 761                       if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 762                          result |= DLGC_WANTMESSAGE;
 763                    }
 764                 }
 765                 break;
 766
 767         case WM_IME_CHAR:
 768             if (!unicode)
 769             {
 770                 WCHAR charW;
 771                 CHAR  strng[2];
 772
 773                 strng[0] = wParam >> 8;
 774                 strng[1] = wParam & 0xff;
 775                 MultiByteToWideChar(CP_ACP, 0, strng, 2, &charW, 1);
 776                 EDIT_WM_Char(es, charW);
 777                 break;
 778             }
 779             /* fall through */
 780         case WM_CHAR:
 781         {
 782                 WCHAR charW;
 783
 784                 if(unicode)
 785                     charW = wParam;
 786                 else
 787                 {
 788                     CHAR charA = wParam;
 789                     MultiByteToWideChar(CP_ACP, 0, &charA, 1, &charW, 1);
 790                 }
 791
 792                 if ((charW == VK_RETURN || charW == VK_ESCAPE) && es->hwndListBox)
 793                 {
 794                    if (SendMessageW(GetParent(hwnd), CB_GETDROPPEDSTATE, 0, 0))
 795                       SendMessageW(GetParent(hwnd), WM_KEYDOWN, charW, 0);
 796                    break;
 797                 }
 798                 EDIT_WM_Char(es, charW);
 799                 break;
 800         }
 801
 802         case WM_CLEAR:
 803                 EDIT_WM_Clear(es);
 804                 break;
 805
 806         case WM_COMMAND:
 807                 EDIT_WM_Command(es, HIWORD(wParam), LOWORD(wParam), (HWND)lParam);
 808                 break;
 809
 810         case WM_CONTEXTMENU:
 811                 EDIT_WM_ContextMenu(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
 812                 break;
 813
 814         case WM_COPY:
 815                 EDIT_WM_Copy(es);
 816                 break;
 817
 818         case WM_CREATE:
 819                 if(unicode)
 820                     result = EDIT_WM_Create(es, ((LPCREATESTRUCTW)lParam)->lpszName);
 821                 else
 822                 {
 823                     LPCSTR nameA = ((LPCREATESTRUCTA)lParam)->lpszName;
 824                     LPWSTR nameW = NULL;
 825                     if(nameA)
 826                     {
 827                         INT countW = MultiByteToWideChar(CP_ACP, 0, nameA, -1, NULL, 0);
 828                         if((nameW = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
 829                             MultiByteToWideChar(CP_ACP, 0, nameA, -1, nameW, countW);
 830                     }
 831                     result = EDIT_WM_Create(es, nameW);
 832                     if(nameW)
 833                         HeapFree(GetProcessHeap(), 0, nameW);
 834                 }
 835                 break;
 836
 837         case WM_CUT:
 838                 EDIT_WM_Cut(es);
 839                 break;
 840
 841         case WM_ENABLE:
 842                 es->bEnableState = (BOOL) wParam;
 843                 EDIT_UpdateText(es, NULL, TRUE);
 844                 break;
 845
 846         case WM_ERASEBKGND:
 847                 result = EDIT_WM_EraseBkGnd(es, (HDC)wParam);
 848                 break;
 849
 850         case WM_GETFONT:
 851                 result = (LRESULT)es->font;
 852                 break;
 853
 854         case WM_GETTEXT:
 855                 result = (LRESULT)EDIT_WM_GetText(es, (INT)wParam, lParam, unicode);
 856                 break;
 857
 858         case WM_GETTEXTLENGTH:
 859                 if (unicode) result = strlenW(es->text);
 860                 else result = WideCharToMultiByte( CP_ACP, 0, es->text, strlenW(es->text),
 861                                                    NULL, 0, NULL, NULL );
 862                 break;
 863
 864         case WM_HSCROLL:
 865                 result = EDIT_WM_HScroll(es, LOWORD(wParam), (short)HIWORD(wParam));
 866                 break;
 867
 868         case WM_KEYDOWN:
 869                 result = EDIT_WM_KeyDown(es, (INT)wParam);
 870                 break;
 871
 872         case WM_KILLFOCUS:
 873                 result = EDIT_WM_KillFocus(es);
 874                 break;
 875
 876         case WM_LBUTTONDBLCLK:
 877                 result = EDIT_WM_LButtonDblClk(es);
 878                 break;
 879
 880         case WM_LBUTTONDOWN:
 881                 result = EDIT_WM_LButtonDown(es, wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
 882                 break;
 883
 884         case WM_LBUTTONUP:
 885                 result = EDIT_WM_LButtonUp(es);
 886                 break;
 887
 888         case WM_MBUTTONDOWN:
 889                 result = EDIT_WM_MButtonDown(es);
 890                 break;
 891
 892         case WM_MOUSEACTIVATE:
 893                 result = MA_ACTIVATE;
 894                 break;
 895
 896         case WM_MOUSEMOVE:
 897                 result = EDIT_WM_MouseMove(es, (short)LOWORD(lParam), (short)HIWORD(lParam));
 898                 break;
 899
 900         case WM_PAINT:
 901                 EDIT_WM_Paint(es, wParam);
 902                 break;
 903
 904         case WM_PASTE:
 905                 EDIT_WM_Paste(es);
 906                 break;
 907
 908         case WM_SETFOCUS:
 909                 EDIT_WM_SetFocus(es);
 910                 break;
 911
 912         case WM_SETFONT:
 913                 EDIT_WM_SetFont(es, (HFONT)wParam, LOWORD(lParam) != 0);
 914                 break;
 915
 916         case WM_SETREDRAW:
 917                 /* FIXME: actually set an internal flag and behave accordingly */
 918                 break;
 919
 920         case WM_SETTEXT:
 921                 EDIT_WM_SetText(es, lParam, unicode);
 922                 result = TRUE;
 923                 break;
 924
 925         case WM_SIZE:
 926                 EDIT_WM_Size(es, (UINT)wParam, LOWORD(lParam), HIWORD(lParam));
 927                 break;
 928
 929         case WM_STYLECHANGED:
 930                 result = EDIT_WM_StyleChanged(es, wParam, (const STYLESTRUCT *)lParam);
 931                 break;
 932
 933         case WM_STYLECHANGING:
 934                 result = 0; /* See EDIT_WM_StyleChanged */
 935                 break;
 936
 937         case WM_SYSKEYDOWN:
 938                 result = EDIT_WM_SysKeyDown(es, (INT)wParam, (DWORD)lParam);
 939                 break;
 940
 941         case WM_TIMER:
 942                 EDIT_WM_Timer(es);
 943                 break;
 944
 945         case WM_VSCROLL:
 946                 result = EDIT_WM_VScroll(es, LOWORD(wParam), (short)HIWORD(wParam));
 947                 break;
 948
 949         case WM_MOUSEWHEEL:
 950                 {
 951                     int gcWheelDelta = 0;
 952                     UINT pulScrollLines = 3;
 953                     SystemParametersInfoW(SPI_GETWHEELSCROLLLINES,0, &pulScrollLines, 0);
 954
 955                     if (wParam & (MK_SHIFT | MK_CONTROL)) {
 956                         result = DefWindowProcW(hwnd, msg, wParam, lParam);
 957                         break;
 958                     }
 959                     gcWheelDelta -= GET_WHEEL_DELTA_WPARAM(wParam);
 960                     if (abs(gcWheelDelta) >= WHEEL_DELTA && pulScrollLines)
 961                     {
 962                         int cLineScroll= (int) min((UINT) es->line_count, pulScrollLines);
 963                         cLineScroll *= (gcWheelDelta / WHEEL_DELTA);
 964                         result = EDIT_EM_LineScroll(es, 0, cLineScroll);
 965                     }
 966                 }
 967                 break;
 968         default:
 969                 result = DefWindowProcT(hwnd, msg, wParam, lParam, unicode);
 970                 break;
 971         }
 972
 973         if (es) EDIT_UnlockBuffer(es, FALSE);
 974
 975         return result;
 976 }
 977
 978 /*********************************************************************
 979  *
 980  *      EditWndProcW   (USER32.@)
 981  */
 982 LRESULT WINAPI EditWndProcW(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 983 {
 984     return EditWndProc_common(hWnd, uMsg, wParam, lParam, TRUE);
 985 }
 986
 987 /*********************************************************************
 988  *
 989  *      EditWndProc   (USER32.@)
 990  */
 991 LRESULT WINAPI EditWndProcA(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 992 {
 993     return EditWndProc_common(hWnd, uMsg, wParam, lParam, FALSE);
 994 }
 995
 996 /*********************************************************************
 997  *
 998  *      EDIT_BuildLineDefs_ML
 999  *
1000  *      Build linked list of text lines.
1001  *      Lines can end with '\0' (last line), a character (if it is wrapped),
1002  *      a soft return '\r\r\n' or a hard return '\r\n'
1003  *
1004  */
1005 static void EDIT_BuildLineDefs_ML(EDITSTATE *es, INT istart, INT iend, INT delta, HRGN hrgn)
1006 {
1007         HDC dc;
1008         HFONT old_font = 0;
1009         LPWSTR current_position, cp;
1010         INT fw;
1011         LINEDEF *current_line;
1012         LINEDEF *previous_line;
1013         LINEDEF *start_line;
1014         INT line_index = 0, nstart_line = 0, nstart_index = 0;
1015         INT line_count = es->line_count;
1016         INT orig_net_length;
1017         RECT rc;
1018
1019         if (istart == iend && delta == 0)
1020                 return;
1021
1022         dc = GetDC(es->hwndSelf);
1023         if (es->font)
1024                 old_font = SelectObject(dc, es->font);
1025
1026         previous_line = NULL;
1027         current_line = es->first_line_def;
1028
1029         /* Find starting line. istart must lie inside an existing line or
1030          * at the end of buffer */
1031         do {
1032                 if (istart < current_line->index + current_line->length ||
1033                                 current_line->ending == END_0)
1034                         break;
1035
1036                 previous_line = current_line;
1037                 current_line = current_line->next;
1038                 line_index++;
1039         } while (current_line);
1040
1041         if (!current_line) /* Error occurred start is not inside previous buffer */
1042         {
1043                 FIXME(" modification occurred outside buffer\n");
1044                 ReleaseDC(es->hwndSelf, dc);
1045                 return;
1046         }
1047
1048         /* Remember start of modifications in order to calculate update region */
1049         nstart_line = line_index;
1050         nstart_index = current_line->index;
1051
1052         /* We must start to reformat from the previous line since the modifications
1053          * may have caused the line to wrap upwards. */
1054         if (!(es->style & ES_AUTOHSCROLL) && line_index > 0)
1055         {
1056                 line_index--;
1057                 current_line = previous_line;
1058         }
1059         start_line = current_line;
1060
1061         fw = es->format_rect.right - es->format_rect.left;
1062         current_position = es->text + current_line->index;
1063         do {
1064                 if (current_line != start_line)
1065                 {
1066                         if (!current_line || current_line->index + delta > current_position - es->text)
1067                         {
1068                                 /* The buffer has been expanded, create a new line and
1069                                    insert it into the link list */
1070                                 LINEDEF *new_line = HeapAlloc(GetProcessHeap(), 0, sizeof(LINEDEF));
1071                                 new_line->next = previous_line->next;
1072                                 previous_line->next = new_line;
1073                                 current_line = new_line;
1074                                 es->line_count++;
1075                         }
1076                         else if (current_line->index + delta < current_position - es->text)
1077                         {
1078                                 /* The previous line merged with this line so we delete this extra entry */
1079                                 previous_line->next = current_line->next;
1080                                 HeapFree(GetProcessHeap(), 0, current_line);
1081                                 current_line = previous_line->next;
1082                                 es->line_count--;
1083                                 continue;
1084                         }
1085                         else /* current_line->index + delta == current_position */
1086                         {
1087                                 if (current_position - es->text > iend)
1088                                         break; /* We reached end of line modifications */
1089                                 /* else recalulate this line */
1090                         }
1091                 }
1092
1093                 current_line->index = current_position - es->text;
1094                 orig_net_length = current_line->net_length;
1095
1096                 /* Find end of line */
1097                 cp = current_position;
1098                 while (*cp) {
1099                     if (*cp == '\n') break;
1100                         if ((*cp == '\r') && (*(cp + 1) == '\n'))
1101                                 break;
1102                         cp++;
1103                 }
1104
1105                 /* Mark type of line termination */
1106                 if (!(*cp)) {
1107                         current_line->ending = END_0;
1108                         current_line->net_length = strlenW(current_position);
1109                 } else if ((cp > current_position) && (*(cp - 1) == '\r')) {
1110                         current_line->ending = END_SOFT;
1111                         current_line->net_length = cp - current_position - 1;
1112                 } else if (*cp == '\n') {
1113                         current_line->ending = END_RICH;
1114                         current_line->net_length = cp - current_position;
1115                 } else {
1116                         current_line->ending = END_HARD;
1117                         current_line->net_length = cp - current_position;
1118                 }
1119
1120                 /* Calculate line width */
1121                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1122                                         current_position, current_line->net_length,
1123                                         es->tabs_count, es->tabs));
1124
1125                 /* FIXME: check here for lines that are too wide even in AUTOHSCROLL (> 32767 ???) */
1126                 if ((!(es->style & ES_AUTOHSCROLL)) && (current_line->width > fw)) {
1127                         INT next = 0;
1128                         INT prev;
1129                         do {
1130                                 prev = next;
1131                                 next = EDIT_CallWordBreakProc(es, current_position - es->text,
1132                                                 prev + 1, current_line->net_length, WB_RIGHT);
1133                                 current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1134                                                         current_position, next, es->tabs_count, es->tabs));
1135                         } while (current_line->width <= fw);
1136                         if (!prev) { /* Didn't find a line break so force a break */
1137                                 next = 0;
1138                                 do {
1139                                         prev = next;
1140                                         next++;
1141                                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc,
1142                                                                 current_position, next, es->tabs_count, es->tabs));
1143                                 } while (current_line->width <= fw);
1144                                 if (!prev)
1145                                         prev = 1;
1146                         }
1147
1148                         /* If the first line we are calculating, wrapped before istart, we must
1149                          * adjust istart in order for this to be reflected in the update region. */
1150                         if (current_line->index == nstart_index && istart > current_line->index + prev)
1151                                 istart = current_line->index + prev;
1152                         /* else if we are updating the previous line before the first line we
1153                          * are re-calculating and it expanded */
1154                         else if (current_line == start_line &&
1155                                         current_line->index != nstart_index && orig_net_length < prev)
1156                         {
1157                           /* Line expanded due to an upwards line wrap so we must partially include
1158                            * previous line in update region */
1159                                 nstart_line = line_index;
1160                                 nstart_index = current_line->index;
1161                                 istart = current_line->index + orig_net_length;
1162                         }
1163
1164                         current_line->net_length = prev;
1165                         current_line->ending = END_WRAP;
1166                         current_line->width = (INT)LOWORD(GetTabbedTextExtentW(dc, current_position,
1167                                         current_line->net_length, es->tabs_count, es->tabs));
1168                 }
1169
1170
1171                 /* Adjust length to include line termination */
1172                 switch (current_line->ending) {
1173                 case END_SOFT:
1174                         current_line->length = current_line->net_length + 3;
1175                         break;
1176                 case END_RICH:
1177                         current_line->length = current_line->net_length + 1;
1178                         break;
1179                 case END_HARD:
1180                         current_line->length = current_line->net_length + 2;
1181                         break;
1182                 case END_WRAP:
1183                 case END_0:
1184                         current_line->length = current_line->net_length;
1185                         break;
1186                 }
1187                 es->text_width = max(es->text_width, current_line->width);
1188                 current_position += current_line->length;
1189                 previous_line = current_line;
1190                 current_line = current_line->next;
1191                 line_index++;
1192         } while (previous_line->ending != END_0);
1193
1194         /* Finish adjusting line indexes by delta or remove hanging lines */
1195         if (previous_line->ending == END_0)
1196         {
1197                 LINEDEF *pnext = NULL;
1198
1199                 previous_line->next = NULL;
1200                 while (current_line)
1201                 {
1202                         pnext = current_line->next;
1203                         HeapFree(GetProcessHeap(), 0, current_line);
1204                         current_line = pnext;
1205                         es->line_count--;
1206                 }
1207         }
1208         else
1209         {
1210                 while (current_line)
1211                 {
1212                         current_line->index += delta;
1213                         current_line = current_line->next;
1214                 }
1215         }
1216
1217         /* Calculate rest of modification rectangle */
1218         if (hrgn)
1219         {
1220                 HRGN tmphrgn;
1221            /*
1222                 * We calculate two rectangles. One for the first line which may have
1223                 * an indent with respect to the format rect. The other is a format-width
1224                 * rectangle that spans the rest of the lines that changed or moved.
1225                 */
1226                 rc.top = es->format_rect.top + nstart_line * es->line_height -
1227                         (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1228                 rc.bottom = rc.top + es->line_height;
1229                 rc.left = es->format_rect.left + (INT)LOWORD(GetTabbedTextExtentW(dc,
1230                                         es->text + nstart_index, istart - nstart_index,
1231                                         es->tabs_count, es->tabs)) - es->x_offset; /* Adjust for horz scroll */
1232                 rc.right = es->format_rect.right;
1233                 SetRectRgn(hrgn, rc.left, rc.top, rc.right, rc.bottom);
1234
1235                 rc.top = rc.bottom;
1236                 rc.left = es->format_rect.left;
1237                 rc.right = es->format_rect.right;
1238            /*
1239                 * If lines were added or removed we must re-paint the remainder of the
1240             * lines since the remaining lines were either shifted up or down.
1241                 */
1242                 if (line_count < es->line_count) /* We added lines */
1243                         rc.bottom = es->line_count * es->line_height;
1244                 else if (line_count > es->line_count) /* We removed lines */
1245                         rc.bottom = line_count * es->line_height;
1246                 else
1247                         rc.bottom = line_index * es->line_height;
1248                 rc.bottom -= (es->y_offset * es->line_height); /* Adjust for vertical scrollbar */
1249                 tmphrgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
1250                 CombineRgn(hrgn, hrgn, tmphrgn, RGN_OR);
1251                 DeleteObject(tmphrgn);
1252         }
1253
1254         if (es->font)
1255                 SelectObject(dc, old_font);
1256
1257         ReleaseDC(es->hwndSelf, dc);
1258 }
1259
1260 /*********************************************************************
1261  *
1262  *      EDIT_CalcLineWidth_SL
1263  *
1264  */
1265 static void EDIT_CalcLineWidth_SL(EDITSTATE *es)
1266 {
1267     es->text_width = (short)LOWORD(EDIT_EM_PosFromChar(es, strlenW(es->text), FALSE));
1268 }
1269
1270 /*********************************************************************
1271  *
1272  *      EDIT_CallWordBreakProc
1273  *
1274  *      Call appropriate WordBreakProc (internal or external).
1275  *
1276  *      Note: The "start" argument should always be an index referring
1277  *              to es->text.  The actual wordbreak proc might be
1278  *              16 bit, so we can't always pass any 32 bit LPSTR.
1279  *              Hence we assume that es->text is the buffer that holds
1280  *              the string under examination (we can decide this for ourselves).
1281  *
1282  */
1283 static INT EDIT_CallWordBreakProc(EDITSTATE *es, INT start, INT index, INT count, INT action)
1284 {
1285     INT ret, iWndsLocks;
1286
1287     /* To avoid any deadlocks, all the locks on the window structures
1288        must be suspended before the control is passed to the application */
1289     iWndsLocks = WIN_SuspendWndsLock();
1290
1291         if (es->word_break_proc16) {
1292             HGLOBAL16 hglob16;
1293             SEGPTR segptr;
1294             INT countA;
1295             WORD args[5];
1296             DWORD result;
1297
1298             countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1299             hglob16 = GlobalAlloc16(GMEM_MOVEABLE | GMEM_ZEROINIT, countA);
1300             segptr = K32WOWGlobalLock16(hglob16);
1301             WideCharToMultiByte(CP_ACP, 0, es->text + start, count, MapSL(segptr), countA, NULL, NULL);
1302             args[4] = SELECTOROF(segptr);
1303             args[3] = OFFSETOF(segptr);
1304             args[2] = index;
1305             args[1] = countA;
1306             args[0] = action;
1307             WOWCallback16Ex((DWORD)es->word_break_proc16, WCB16_PASCAL, sizeof(args), args, &result);
1308             ret = LOWORD(result);
1309             GlobalUnlock16(hglob16);
1310             GlobalFree16(hglob16);
1311         }
1312         else if (es->word_break_proc)
1313         {
1314             if(es->is_unicode)
1315             {
1316                 EDITWORDBREAKPROCW wbpW = (EDITWORDBREAKPROCW)es->word_break_proc;
1317
1318                 TRACE_(relay)("(UNICODE wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1319                         es->word_break_proc, debugstr_wn(es->text + start, count), index, count, action);
1320                 ret = wbpW(es->text + start, index, count, action);
1321             }
1322             else
1323             {
1324                 EDITWORDBREAKPROCA wbpA = (EDITWORDBREAKPROCA)es->word_break_proc;
1325                 INT countA;
1326                 CHAR *textA;
1327
1328                 countA = WideCharToMultiByte(CP_ACP, 0, es->text + start, count, NULL, 0, NULL, NULL);
1329                 textA = HeapAlloc(GetProcessHeap(), 0, countA);
1330                 WideCharToMultiByte(CP_ACP, 0, es->text + start, count, textA, countA, NULL, NULL);
1331                 TRACE_(relay)("(ANSI wordbrk=%p,str=%s,idx=%d,cnt=%d,act=%d)\n",
1332                         es->word_break_proc, debugstr_an(textA, countA), index, countA, action);
1333                 ret = wbpA(textA, index, countA, action);
1334                 HeapFree(GetProcessHeap(), 0, textA);
1335             }
1336         }
1337         else
1338             ret = EDIT_WordBreakProc(es->text + start, index, count, action);
1339
1340     WIN_RestoreWndsLock(iWndsLocks);
1341     return ret;
1342 }
1343
1344
1345 /*********************************************************************
1346  *
1347  *      EDIT_CharFromPos
1348  *
1349  *      Beware: This is not the function called on EM_CHARFROMPOS
1350  *              The position _can_ be outside the formatting / client
1351  *              rectangle
1352  *              The return value is only the character index
1353  *
1354  */
1355 static INT EDIT_CharFromPos(EDITSTATE *es, INT x, INT y, LPBOOL after_wrap)
1356 {
1357         INT index;
1358         HDC dc;
1359         HFONT old_font = 0;
1360
1361         if (es->style & ES_MULTILINE) {
1362                 INT line = (y - es->format_rect.top) / es->line_height + es->y_offset;
1363                 INT line_index = 0;
1364                 LINEDEF *line_def = es->first_line_def;
1365                 INT low, high;
1366                 while ((line > 0) && line_def->next) {
1367                         line_index += line_def->length;
1368                         line_def = line_def->next;
1369                         line--;
1370                 }
1371                 x += es->x_offset - es->format_rect.left;
1372                 if (x >= line_def->width) {
1373                         if (after_wrap)
1374                                 *after_wrap = (line_def->ending == END_WRAP);
1375                         return line_index + line_def->net_length;
1376                 }
1377                 if (x <= 0) {
1378                         if (after_wrap)
1379                                 *after_wrap = FALSE;
1380                         return line_index;
1381                 }
1382                 dc = GetDC(es->hwndSelf);
1383                 if (es->font)
1384                         old_font = SelectObject(dc, es->font);
1385                     low = line_index + 1;
1386                     high = line_index + line_def->net_length + 1;
1387                     while (low < high - 1)
1388                     {
1389                         INT mid = (low + high) / 2;
1390                         if (LOWORD(GetTabbedTextExtentW(dc, es->text + line_index,mid - line_index, es->tabs_count, es->tabs)) > x) high = mid;
1391                         else low = mid;
1392                     }
1393                     index = low;
1394
1395                 if (after_wrap)
1396                         *after_wrap = ((index == line_index + line_def->net_length) &&
1397                                                         (line_def->ending == END_WRAP));
1398         } else {
1399                 LPWSTR text;
1400                 SIZE size;
1401                 if (after_wrap)
1402                         *after_wrap = FALSE;
1403                 x -= es->format_rect.left;
1404                 if (!x)
1405                         return es->x_offset;
1406                 text = EDIT_GetPasswordPointer_SL(es);
1407                 dc = GetDC(es->hwndSelf);
1408                 if (es->font)
1409                         old_font = SelectObject(dc, es->font);
1410                 if (x < 0)
1411                 {
1412                     INT low = 0;
1413                     INT high = es->x_offset;
1414                     while (low < high - 1)
1415                     {
1416                         INT mid = (low + high) / 2;
1417                         GetTextExtentPoint32W( dc, text + mid,
1418                                                es->x_offset - mid, &size );
1419                         if (size.cx > -x) low = mid;
1420                         else high = mid;
1421                     }
1422                     index = low;
1423                 }
1424                 else
1425                 {
1426                     INT low = es->x_offset;
1427                     INT high = strlenW(es->text) + 1;
1428                     while (low < high - 1)
1429                     {
1430                         INT mid = (low + high) / 2;
1431                         GetTextExtentPoint32W( dc, text + es->x_offset,
1432                                                mid - es->x_offset, &size );
1433                         if (size.cx > x) high = mid;
1434                         else low = mid;
1435                     }
1436                     index = low;
1437                 }
1438                 if (es->style & ES_PASSWORD)
1439                         HeapFree(GetProcessHeap(), 0, text);
1440         }
1441         if (es->font)
1442                 SelectObject(dc, old_font);
1443         ReleaseDC(es->hwndSelf, dc);
1444         return index;
1445 }
1446
1447
1448 /*********************************************************************
1449  *
1450  *      EDIT_ConfinePoint
1451  *
1452  *      adjusts the point to be within the formatting rectangle
1453  *      (so CharFromPos returns the nearest _visible_ character)
1454  *
1455  */
1456 static void EDIT_ConfinePoint(EDITSTATE *es, LPINT x, LPINT y)
1457 {
1458         *x = min(max(*x, es->format_rect.left), es->format_rect.right - 1);
1459         *y = min(max(*y, es->format_rect.top), es->format_rect.bottom - 1);
1460 }
1461
1462
1463 /*********************************************************************
1464  *
1465  *      EDIT_GetLineRect
1466  *
1467  *      Calculates the bounding rectangle for a line from a starting
1468  *      column to an ending column.
1469  *
1470  */
1471 static void EDIT_GetLineRect(EDITSTATE *es, INT line, INT scol, INT ecol, LPRECT rc)
1472 {
1473         INT line_index =  EDIT_EM_LineIndex(es, line);
1474
1475         if (es->style & ES_MULTILINE)
1476                 rc->top = es->format_rect.top + (line - es->y_offset) * es->line_height;
1477         else
1478                 rc->top = es->format_rect.top;
1479         rc->bottom = rc->top + es->line_height;
1480         rc->left = (scol == 0) ? es->format_rect.left : (short)LOWORD(EDIT_EM_PosFromChar(es, line_index + scol, TRUE));
1481         rc->right = (ecol == -1) ? es->format_rect.right : (short)LOWORD(EDIT_EM_PosFromChar(es, line_index + ecol, TRUE));
1482 }
1483
1484
1485 /*********************************************************************
1486  *
1487  *      EDIT_GetPasswordPointer_SL
1488  *
1489  *      note: caller should free the (optionally) allocated buffer
1490  *
1491  */
1492 static LPWSTR EDIT_GetPasswordPointer_SL(EDITSTATE *es)
1493 {
1494         if (es->style & ES_PASSWORD) {
1495                 INT len = strlenW(es->text);
1496                 LPWSTR text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
1497                 text[len] = '\0';
1498                 while(len) text[--len] = es->password_char;
1499                 return text;
1500         } else
1501                 return es->text;
1502 }
1503
1504
1505 /*********************************************************************
1506  *
1507  *      EDIT_LockBuffer
1508  *
1509  *      This acts as a LOCAL_Lock(), but it locks only once.  This way
1510  *      you can call it whenever you like, without unlocking.
1511  *
1512  *      Initially the edit control allocates a HLOCAL32 buffer
1513  *      (32 bit linear memory handler).  However, 16 bit application
1514  *      might send a EM_GETHANDLE message and expect a HLOCAL16 (16 bit SEG:OFF
1515  *      handler).  From that moment on we have to keep using this 16 bit memory
1516  *      handler, because it is supposed to be valid at all times after EM_GETHANDLE.
1517  *      What we do is create a HLOCAL16 buffer, copy the text, and do pointer
1518  *      conversion.
1519  *
1520  */
1521 static void EDIT_LockBuffer(EDITSTATE *es)
1522 {
1523         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
1524         if (!es->text) {
1525             CHAR *textA = NULL;
1526             UINT countA = 0;
1527             BOOL _16bit = FALSE;
1528
1529             if(es->hloc32W)
1530             {
1531                 if(es->hloc32A)
1532                 {
1533                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
1534                     textA = LocalLock(es->hloc32A);
1535                     countA = strlen(textA) + 1;
1536                 }
1537                 else if(es->hloc16)
1538                 {
1539                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
1540                     textA = LOCAL_Lock(hInstance, es->hloc16);
1541                     countA = strlen(textA) + 1;
1542                     _16bit = TRUE;
1543                 }
1544             }
1545             else {
1546                 ERR("no buffer ... please report\n");
1547                 return;
1548             }
1549
1550             if(textA)
1551             {
1552                 HLOCAL hloc32W_new;
1553                 UINT countW_new = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
1554                 TRACE("%d bytes translated to %d WCHARs\n", countA, countW_new);
1555                 if(countW_new > es->buffer_size + 1)
1556                 {
1557                     UINT alloc_size = ROUND_TO_GROW(countW_new * sizeof(WCHAR));
1558                     TRACE("Resizing 32-bit UNICODE buffer from %d+1 to %d WCHARs\n", es->buffer_size, countW_new);
1559                     hloc32W_new = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
1560                     if(hloc32W_new)
1561                     {
1562                         es->hloc32W = hloc32W_new;
1563                         es->buffer_size = LocalSize(hloc32W_new)/sizeof(WCHAR) - 1;
1564                         TRACE("Real new size %d+1 WCHARs\n", es->buffer_size);
1565                     }
1566                     else
1567                         WARN("FAILED! Will synchronize partially\n");
1568                 }
1569             }
1570
1571             /*TRACE("Locking 32-bit UNICODE buffer\n");*/
1572             es->text = LocalLock(es->hloc32W);
1573
1574             if(textA)
1575             {
1576                 MultiByteToWideChar(CP_ACP, 0, textA, countA, es->text, es->buffer_size + 1);
1577                 if(_16bit)
1578                     LOCAL_Unlock(hInstance, es->hloc16);
1579                 else
1580                     LocalUnlock(es->hloc32A);
1581             }
1582         }
1583         es->lock_count++;
1584 }
1585
1586
1587 /*********************************************************************
1588  *
1589  *      EDIT_SL_InvalidateText
1590  *
1591  *      Called from EDIT_InvalidateText().
1592  *      Does the job for single-line controls only.
1593  *
1594  */
1595 static void EDIT_SL_InvalidateText(EDITSTATE *es, INT start, INT end)
1596 {
1597         RECT line_rect;
1598         RECT rc;
1599
1600         EDIT_GetLineRect(es, 0, start, end, &line_rect);
1601         if (IntersectRect(&rc, &line_rect, &es->format_rect))
1602                 EDIT_UpdateText(es, &rc, TRUE);
1603 }
1604
1605
1606 /*********************************************************************
1607  *
1608  *      EDIT_ML_InvalidateText
1609  *
1610  *      Called from EDIT_InvalidateText().
1611  *      Does the job for multi-line controls only.
1612  *
1613  */
1614 static void EDIT_ML_InvalidateText(EDITSTATE *es, INT start, INT end)
1615 {
1616         INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
1617         INT sl = EDIT_EM_LineFromChar(es, start);
1618         INT el = EDIT_EM_LineFromChar(es, end);
1619         INT sc;
1620         INT ec;
1621         RECT rc1;
1622         RECT rcWnd;
1623         RECT rcLine;
1624         RECT rcUpdate;
1625         INT l;
1626
1627         if ((el < es->y_offset) || (sl > es->y_offset + vlc))
1628                 return;
1629
1630         sc = start - EDIT_EM_LineIndex(es, sl);
1631         ec = end - EDIT_EM_LineIndex(es, el);
1632         if (sl < es->y_offset) {
1633                 sl = es->y_offset;
1634                 sc = 0;
1635         }
1636         if (el > es->y_offset + vlc) {
1637                 el = es->y_offset + vlc;
1638                 ec = EDIT_EM_LineLength(es, EDIT_EM_LineIndex(es, el));
1639         }
1640         GetClientRect(es->hwndSelf, &rc1);
1641         IntersectRect(&rcWnd, &rc1, &es->format_rect);
1642         if (sl == el) {
1643                 EDIT_GetLineRect(es, sl, sc, ec, &rcLine);
1644                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1645                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1646         } else {
1647                 EDIT_GetLineRect(es, sl, sc,
1648                                 EDIT_EM_LineLength(es,
1649                                         EDIT_EM_LineIndex(es, sl)),
1650                                 &rcLine);
1651                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1652                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1653                 for (l = sl + 1 ; l < el ; l++) {
1654                         EDIT_GetLineRect(es, l, 0,
1655                                 EDIT_EM_LineLength(es,
1656                                         EDIT_EM_LineIndex(es, l)),
1657                                 &rcLine);
1658                         if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1659                                 EDIT_UpdateText(es, &rcUpdate, TRUE);
1660                 }
1661                 EDIT_GetLineRect(es, el, 0, ec, &rcLine);
1662                 if (IntersectRect(&rcUpdate, &rcWnd, &rcLine))
1663                         EDIT_UpdateText(es, &rcUpdate, TRUE);
1664         }
1665 }
1666
1667
1668 /*********************************************************************
1669  *
1670  *      EDIT_InvalidateText
1671  *
1672  *      Invalidate the text from offset start upto, but not including,
1673  *      offset end.  Useful for (re)painting the selection.
1674  *      Regions outside the linewidth are not invalidated.
1675  *      end == -1 means end == TextLength.
1676  *      start and end need not be ordered.
1677  *
1678  */
1679 static void EDIT_InvalidateText(EDITSTATE *es, INT start, INT end)
1680 {
1681         if (end == start)
1682                 return;
1683
1684         if (end == -1)
1685                 end = strlenW(es->text);
1686
1687         if (end < start) {
1688             INT tmp = start;
1689             start = end;
1690             end = tmp;
1691         }
1692
1693         if (es->style & ES_MULTILINE)
1694                 EDIT_ML_InvalidateText(es, start, end);
1695         else
1696                 EDIT_SL_InvalidateText(es, start, end);
1697 }
1698
1699
1700 /*********************************************************************
1701  *
1702  *      EDIT_MakeFit
1703  *
1704  * Try to fit size + 1 characters in the buffer.
1705  * Constrain to limits if honor_limit is TRUE.
1706  */
1707 static BOOL EDIT_MakeFit(EDITSTATE *es, UINT size, BOOL honor_limit)
1708 {
1709         HLOCAL hNew32W;
1710
1711         if ((honor_limit) && (es->buffer_limit > 0) && (size > es->buffer_limit)) {
1712                 EDIT_NOTIFY_PARENT(es, EN_MAXTEXT, "EN_MAXTEXT");
1713                 return FALSE;
1714         }
1715
1716         if (size <= es->buffer_size)
1717                 return TRUE;
1718
1719         TRACE("trying to ReAlloc to %d+1 characters\n", size);
1720
1721         /* Force edit to unlock it's buffer. es->text now NULL */
1722         EDIT_UnlockBuffer(es, TRUE);
1723
1724         if (es->hloc32W) {
1725             UINT alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1726             if ((hNew32W = LocalReAlloc(es->hloc32W, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT))) {
1727                 TRACE("Old 32 bit handle %p, new handle %p\n", es->hloc32W, hNew32W);
1728                 es->hloc32W = hNew32W;
1729                 es->buffer_size = LocalSize(hNew32W)/sizeof(WCHAR) - 1;
1730             }
1731         }
1732
1733         EDIT_LockBuffer(es);
1734
1735         if (es->buffer_size < size) {
1736                 WARN("FAILED !  We now have %d+1\n", es->buffer_size);
1737                 EDIT_NOTIFY_PARENT(es, EN_ERRSPACE, "EN_ERRSPACE");
1738                 return FALSE;
1739         } else {
1740                 TRACE("We now have %d+1\n", es->buffer_size);
1741                 return TRUE;
1742         }
1743 }
1744
1745
1746 /*********************************************************************
1747  *
1748  *      EDIT_MakeUndoFit
1749  *
1750  *      Try to fit size + 1 bytes in the undo buffer.
1751  *
1752  */
1753 static BOOL EDIT_MakeUndoFit(EDITSTATE *es, UINT size)
1754 {
1755         UINT alloc_size;
1756
1757         if (size <= es->undo_buffer_size)
1758                 return TRUE;
1759
1760         TRACE("trying to ReAlloc to %d+1\n", size);
1761
1762         alloc_size = ROUND_TO_GROW((size + 1) * sizeof(WCHAR));
1763         if ((es->undo_text = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, es->undo_text, alloc_size))) {
1764                 es->undo_buffer_size = alloc_size/sizeof(WCHAR) - 1;
1765                 return TRUE;
1766         }
1767         else
1768         {
1769                 WARN("FAILED !  We now have %d+1\n", es->undo_buffer_size);
1770                 return FALSE;
1771         }
1772 }
1773
1774
1775 /*********************************************************************
1776  *
1777  *      EDIT_MoveBackward
1778  *
1779  */
1780 static void EDIT_MoveBackward(EDITSTATE *es, BOOL extend)
1781 {
1782         INT e = es->selection_end;
1783
1784         if (e) {
1785                 e--;
1786                 if ((es->style & ES_MULTILINE) && e &&
1787                                 (es->text[e - 1] == '\r') && (es->text[e] == '\n')) {
1788                         e--;
1789                         if (e && (es->text[e - 1] == '\r'))
1790                                 e--;
1791                 }
1792         }
1793         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1794         EDIT_EM_ScrollCaret(es);
1795 }
1796
1797
1798 /*********************************************************************
1799  *
1800  *      EDIT_MoveDown_ML
1801  *
1802  *      Only for multi line controls
1803  *      Move the caret one line down, on a column with the nearest
1804  *      x coordinate on the screen (might be a different column).
1805  *
1806  */
1807 static void EDIT_MoveDown_ML(EDITSTATE *es, BOOL extend)
1808 {
1809         INT s = es->selection_start;
1810         INT e = es->selection_end;
1811         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1812         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1813         INT x = (short)LOWORD(pos);
1814         INT y = (short)HIWORD(pos);
1815
1816         e = EDIT_CharFromPos(es, x, y + es->line_height, &after_wrap);
1817         if (!extend)
1818                 s = e;
1819         EDIT_EM_SetSel(es, s, e, after_wrap);
1820         EDIT_EM_ScrollCaret(es);
1821 }
1822
1823
1824 /*********************************************************************
1825  *
1826  *      EDIT_MoveEnd
1827  *
1828  */
1829 static void EDIT_MoveEnd(EDITSTATE *es, BOOL extend)
1830 {
1831         BOOL after_wrap = FALSE;
1832         INT e;
1833
1834         /* Pass a high value in x to make sure of receiving the end of the line */
1835         if (es->style & ES_MULTILINE)
1836                 e = EDIT_CharFromPos(es, 0x3fffffff,
1837                         HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), &after_wrap);
1838         else
1839                 e = strlenW(es->text);
1840         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, after_wrap);
1841         EDIT_EM_ScrollCaret(es);
1842 }
1843
1844
1845 /*********************************************************************
1846  *
1847  *      EDIT_MoveForward
1848  *
1849  */
1850 static void EDIT_MoveForward(EDITSTATE *es, BOOL extend)
1851 {
1852         INT e = es->selection_end;
1853
1854         if (es->text[e]) {
1855                 e++;
1856                 if ((es->style & ES_MULTILINE) && (es->text[e - 1] == '\r')) {
1857                         if (es->text[e] == '\n')
1858                                 e++;
1859                         else if ((es->text[e] == '\r') && (es->text[e + 1] == '\n'))
1860                                 e += 2;
1861                 }
1862         }
1863         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1864         EDIT_EM_ScrollCaret(es);
1865 }
1866
1867
1868 /*********************************************************************
1869  *
1870  *      EDIT_MoveHome
1871  *
1872  *      Home key: move to beginning of line.
1873  *
1874  */
1875 static void EDIT_MoveHome(EDITSTATE *es, BOOL extend)
1876 {
1877         INT e;
1878
1879         /* Pass the x_offset in x to make sure of receiving the first position of the line */
1880         if (es->style & ES_MULTILINE)
1881                 e = EDIT_CharFromPos(es, -es->x_offset,
1882                         HIWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP)), NULL);
1883         else
1884                 e = 0;
1885         EDIT_EM_SetSel(es, extend ? es->selection_start : e, e, FALSE);
1886         EDIT_EM_ScrollCaret(es);
1887 }
1888
1889
1890 /*********************************************************************
1891  *
1892  *      EDIT_MovePageDown_ML
1893  *
1894  *      Only for multi line controls
1895  *      Move the caret one page down, on a column with the nearest
1896  *      x coordinate on the screen (might be a different column).
1897  *
1898  */
1899 static void EDIT_MovePageDown_ML(EDITSTATE *es, BOOL extend)
1900 {
1901         INT s = es->selection_start;
1902         INT e = es->selection_end;
1903         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1904         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1905         INT x = (short)LOWORD(pos);
1906         INT y = (short)HIWORD(pos);
1907
1908         e = EDIT_CharFromPos(es, x,
1909                 y + (es->format_rect.bottom - es->format_rect.top),
1910                 &after_wrap);
1911         if (!extend)
1912                 s = e;
1913         EDIT_EM_SetSel(es, s, e, after_wrap);
1914         EDIT_EM_ScrollCaret(es);
1915 }
1916
1917
1918 /*********************************************************************
1919  *
1920  *      EDIT_MovePageUp_ML
1921  *
1922  *      Only for multi line controls
1923  *      Move the caret one page up, on a column with the nearest
1924  *      x coordinate on the screen (might be a different column).
1925  *
1926  */
1927 static void EDIT_MovePageUp_ML(EDITSTATE *es, BOOL extend)
1928 {
1929         INT s = es->selection_start;
1930         INT e = es->selection_end;
1931         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1932         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1933         INT x = (short)LOWORD(pos);
1934         INT y = (short)HIWORD(pos);
1935
1936         e = EDIT_CharFromPos(es, x,
1937                 y - (es->format_rect.bottom - es->format_rect.top),
1938                 &after_wrap);
1939         if (!extend)
1940                 s = e;
1941         EDIT_EM_SetSel(es, s, e, after_wrap);
1942         EDIT_EM_ScrollCaret(es);
1943 }
1944
1945
1946 /*********************************************************************
1947  *
1948  *      EDIT_MoveUp_ML
1949  *
1950  *      Only for multi line controls
1951  *      Move the caret one line up, on a column with the nearest
1952  *      x coordinate on the screen (might be a different column).
1953  *
1954  */
1955 static void EDIT_MoveUp_ML(EDITSTATE *es, BOOL extend)
1956 {
1957         INT s = es->selection_start;
1958         INT e = es->selection_end;
1959         BOOL after_wrap = (es->flags & EF_AFTER_WRAP);
1960         LRESULT pos = EDIT_EM_PosFromChar(es, e, after_wrap);
1961         INT x = (short)LOWORD(pos);
1962         INT y = (short)HIWORD(pos);
1963
1964         e = EDIT_CharFromPos(es, x, y - es->line_height, &after_wrap);
1965         if (!extend)
1966                 s = e;
1967         EDIT_EM_SetSel(es, s, e, after_wrap);
1968         EDIT_EM_ScrollCaret(es);
1969 }
1970
1971
1972 /*********************************************************************
1973  *
1974  *      EDIT_MoveWordBackward
1975  *
1976  */
1977 static void EDIT_MoveWordBackward(EDITSTATE *es, BOOL extend)
1978 {
1979         INT s = es->selection_start;
1980         INT e = es->selection_end;
1981         INT l;
1982         INT ll;
1983         INT li;
1984
1985         l = EDIT_EM_LineFromChar(es, e);
1986         ll = EDIT_EM_LineLength(es, e);
1987         li = EDIT_EM_LineIndex(es, l);
1988         if (e - li == 0) {
1989                 if (l) {
1990                         li = EDIT_EM_LineIndex(es, l - 1);
1991                         e = li + EDIT_EM_LineLength(es, li);
1992                 }
1993         } else {
1994                 e = li + (INT)EDIT_CallWordBreakProc(es,
1995                                 li, e - li, ll, WB_LEFT);
1996         }
1997         if (!extend)
1998                 s = e;
1999         EDIT_EM_SetSel(es, s, e, FALSE);
2000         EDIT_EM_ScrollCaret(es);
2001 }
2002
2003
2004 /*********************************************************************
2005  *
2006  *      EDIT_MoveWordForward
2007  *
2008  */
2009 static void EDIT_MoveWordForward(EDITSTATE *es, BOOL extend)
2010 {
2011         INT s = es->selection_start;
2012         INT e = es->selection_end;
2013         INT l;
2014         INT ll;
2015         INT li;
2016
2017         l = EDIT_EM_LineFromChar(es, e);
2018         ll = EDIT_EM_LineLength(es, e);
2019         li = EDIT_EM_LineIndex(es, l);
2020         if (e - li == ll) {
2021                 if ((es->style & ES_MULTILINE) && (l != es->line_count - 1))
2022                         e = EDIT_EM_LineIndex(es, l + 1);
2023         } else {
2024                 e = li + EDIT_CallWordBreakProc(es,
2025                                 li, e - li + 1, ll, WB_RIGHT);
2026         }
2027         if (!extend)
2028                 s = e;
2029         EDIT_EM_SetSel(es, s, e, FALSE);
2030         EDIT_EM_ScrollCaret(es);
2031 }
2032
2033
2034 /*********************************************************************
2035  *
2036  *      EDIT_PaintLine
2037  *
2038  */
2039 static void EDIT_PaintLine(EDITSTATE *es, HDC dc, INT line, BOOL rev)
2040 {
2041         INT s = es->selection_start;
2042         INT e = es->selection_end;
2043         INT li;
2044         INT ll;
2045         INT x;
2046         INT y;
2047         LRESULT pos;
2048
2049         if (es->style & ES_MULTILINE) {
2050                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2051                 if ((line < es->y_offset) || (line > es->y_offset + vlc) || (line >= es->line_count))
2052                         return;
2053         } else if (line)
2054                 return;
2055
2056         TRACE("line=%d\n", line);
2057
2058         pos = EDIT_EM_PosFromChar(es, EDIT_EM_LineIndex(es, line), FALSE);
2059         x = (short)LOWORD(pos);
2060         y = (short)HIWORD(pos);
2061         li = EDIT_EM_LineIndex(es, line);
2062         ll = EDIT_EM_LineLength(es, li);
2063         s = min(es->selection_start, es->selection_end);
2064         e = max(es->selection_start, es->selection_end);
2065         s = min(li + ll, max(li, s));
2066         e = min(li + ll, max(li, e));
2067         if (rev && (s != e) &&
2068                         ((es->flags & EF_FOCUSED) || (es->style & ES_NOHIDESEL))) {
2069                 x += EDIT_PaintText(es, dc, x, y, line, 0, s - li, FALSE);
2070                 x += EDIT_PaintText(es, dc, x, y, line, s - li, e - s, TRUE);
2071                 x += EDIT_PaintText(es, dc, x, y, line, e - li, li + ll - e, FALSE);
2072         } else
2073                 x += EDIT_PaintText(es, dc, x, y, line, 0, ll, FALSE);
2074 }
2075
2076
2077 /*********************************************************************
2078  *
2079  *      EDIT_PaintText
2080  *
2081  */
2082 static INT EDIT_PaintText(EDITSTATE *es, HDC dc, INT x, INT y, INT line, INT col, INT count, BOOL rev)
2083 {
2084         COLORREF BkColor;
2085         COLORREF TextColor;
2086         INT ret;
2087         INT li;
2088         INT BkMode;
2089         SIZE size;
2090
2091         if (!count)
2092                 return 0;
2093         BkMode = GetBkMode(dc);
2094         BkColor = GetBkColor(dc);
2095         TextColor = GetTextColor(dc);
2096         if (rev) {
2097                 SetBkColor(dc, GetSysColor(COLOR_HIGHLIGHT));
2098                 SetTextColor(dc, GetSysColor(COLOR_HIGHLIGHTTEXT));
2099                 SetBkMode( dc, OPAQUE);
2100         }
2101         li = EDIT_EM_LineIndex(es, line);
2102         if (es->style & ES_MULTILINE) {
2103                 ret = (INT)LOWORD(TabbedTextOutW(dc, x, y, es->text + li + col, count,
2104                                         es->tabs_count, es->tabs, es->format_rect.left - es->x_offset));
2105         } else {
2106                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2107                 TextOutW(dc, x, y, text + li + col, count);
2108                 GetTextExtentPoint32W(dc, text + li + col, count, &size);
2109                 ret = size.cx;
2110                 if (es->style & ES_PASSWORD)
2111                         HeapFree(GetProcessHeap(), 0, text);
2112         }
2113         if (rev) {
2114                 SetBkColor(dc, BkColor);
2115                 SetTextColor(dc, TextColor);
2116                 SetBkMode( dc, BkMode);
2117         }
2118         return ret;
2119 }
2120
2121
2122 /*********************************************************************
2123  *
2124  *      EDIT_SetCaretPos
2125  *
2126  */
2127 static void EDIT_SetCaretPos(EDITSTATE *es, INT pos,
2128                              BOOL after_wrap)
2129 {
2130         LRESULT res = EDIT_EM_PosFromChar(es, pos, after_wrap);
2131         SetCaretPos((short)LOWORD(res), (short)HIWORD(res));
2132 }
2133
2134
2135 /*********************************************************************
2136  *
2137  *      EDIT_SetRectNP
2138  *
2139  *      note:   this is not (exactly) the handler called on EM_SETRECTNP
2140  *              it is also used to set the rect of a single line control
2141  *
2142  */
2143 static void EDIT_SetRectNP(EDITSTATE *es, LPRECT rc)
2144 {
2145         CopyRect(&es->format_rect, rc);
2146         if (es->style & WS_BORDER) {
2147                 INT bw = GetSystemMetrics(SM_CXBORDER) + 1;
2148                 if(TWEAK_WineLook == WIN31_LOOK)
2149                         bw += 2;
2150                 es->format_rect.left += bw;
2151                 es->format_rect.top += bw;
2152                 es->format_rect.right -= bw;
2153                 es->format_rect.bottom -= bw;
2154         }
2155         es->format_rect.left += es->left_margin;
2156         es->format_rect.right -= es->right_margin;
2157         es->format_rect.right = max(es->format_rect.right, es->format_rect.left + es->char_width);
2158         if (es->style & ES_MULTILINE)
2159         {
2160             INT fw, vlc, max_x_offset, max_y_offset;
2161
2162             vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2163             es->format_rect.bottom = es->format_rect.top + max(1, vlc) * es->line_height;
2164
2165             /* correct es->x_offset */
2166             fw = es->format_rect.right - es->format_rect.left;
2167             max_x_offset = es->text_width - fw;
2168             if(max_x_offset < 0) max_x_offset = 0;
2169             if(es->x_offset > max_x_offset)
2170                 es->x_offset = max_x_offset;
2171
2172             /* correct es->y_offset */
2173             max_y_offset = es->line_count - vlc;
2174             if(max_y_offset < 0) max_y_offset = 0;
2175             if(es->y_offset > max_y_offset)
2176                 es->y_offset = max_y_offset;
2177
2178             /* force scroll info update */
2179             EDIT_UpdateScrollInfo(es);
2180         }
2181         else
2182         /* Windows doesn't care to fix text placement for SL controls */
2183                 es->format_rect.bottom = es->format_rect.top + es->line_height;
2184
2185         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL))
2186                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
2187 }
2188
2189
2190 /*********************************************************************
2191  *
2192  *      EDIT_UnlockBuffer
2193  *
2194  */
2195 static void EDIT_UnlockBuffer(EDITSTATE *es, BOOL force)
2196 {
2197         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
2198
2199         /* Edit window might be already destroyed */
2200         if(!IsWindow(es->hwndSelf))
2201         {
2202             WARN("edit hwnd %p already destroyed\n", es->hwndSelf);
2203             return;
2204         }
2205
2206         if (!es->lock_count) {
2207                 ERR("lock_count == 0 ... please report\n");
2208                 return;
2209         }
2210         if (!es->text) {
2211                 ERR("es->text == 0 ... please report\n");
2212                 return;
2213         }
2214
2215         if (force || (es->lock_count == 1)) {
2216             if (es->hloc32W) {
2217                 CHAR *textA = NULL;
2218                 BOOL _16bit = FALSE;
2219                 UINT countA = 0;
2220                 UINT countW = strlenW(es->text) + 1;
2221
2222                 if(es->hloc32A)
2223                 {
2224                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2225                     TRACE("Synchronizing with 32-bit ANSI buffer\n");
2226                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2227                     countA = LocalSize(es->hloc32A);
2228                     if(countA_new > countA)
2229                     {
2230                         HLOCAL hloc32A_new;
2231                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2232                         TRACE("Resizing 32-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2233                         hloc32A_new = LocalReAlloc(es->hloc32A, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2234                         if(hloc32A_new)
2235                         {
2236                             es->hloc32A = hloc32A_new;
2237                             countA = LocalSize(hloc32A_new);
2238                             TRACE("Real new size %d bytes\n", countA);
2239                         }
2240                         else
2241                             WARN("FAILED! Will synchronize partially\n");
2242                     }
2243                     textA = LocalLock(es->hloc32A);
2244                 }
2245                 else if(es->hloc16)
2246                 {
2247                     UINT countA_new = WideCharToMultiByte(CP_ACP, 0, es->text, countW, NULL, 0, NULL, NULL);
2248                     TRACE("Synchronizing with 16-bit ANSI buffer\n");
2249                     TRACE("%d WCHARs translated to %d bytes\n", countW, countA_new);
2250                     countA = LOCAL_Size(hInstance, es->hloc16);
2251                     if(countA_new > countA)
2252                     {
2253                         HLOCAL16 hloc16_new;
2254                         UINT alloc_size = ROUND_TO_GROW(countA_new);
2255                         TRACE("Resizing 16-bit ANSI buffer from %d to %d bytes\n", countA, alloc_size);
2256                         hloc16_new = LOCAL_ReAlloc(hInstance, es->hloc16, alloc_size, LMEM_MOVEABLE | LMEM_ZEROINIT);
2257                         if(hloc16_new)
2258                         {
2259                             es->hloc16 = hloc16_new;
2260                             countA = LOCAL_Size(hInstance, hloc16_new);
2261                             TRACE("Real new size %d bytes\n", countA);
2262                         }
2263                         else
2264                             WARN("FAILED! Will synchronize partially\n");
2265                     }
2266                     textA = LOCAL_Lock(hInstance, es->hloc16);
2267                     _16bit = TRUE;
2268                 }
2269
2270                 if(textA)
2271                 {
2272                     WideCharToMultiByte(CP_ACP, 0, es->text, countW, textA, countA, NULL, NULL);
2273                     if(_16bit)
2274                         LOCAL_Unlock(hInstance, es->hloc16);
2275                     else
2276                         LocalUnlock(es->hloc32A);
2277                 }
2278
2279                 LocalUnlock(es->hloc32W);
2280                 es->text = NULL;
2281             }
2282             else {
2283                 ERR("no buffer ... please report\n");
2284                 return;
2285             }
2286         }
2287         es->lock_count--;
2288 }
2289
2290
2291 /*********************************************************************
2292  *
2293  *      EDIT_UpdateScrollInfo
2294  *
2295  */
2296 static void EDIT_UpdateScrollInfo(EDITSTATE *es)
2297 {
2298     if ((es->style & WS_VSCROLL) && !(es->flags & EF_VSCROLL_TRACK))
2299     {
2300         SCROLLINFO si;
2301         si.cbSize       = sizeof(SCROLLINFO);
2302         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2303         si.nMin         = 0;
2304         si.nMax         = es->line_count - 1;
2305         si.nPage        = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
2306         si.nPos         = es->y_offset;
2307         TRACE("SB_VERT, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2308                 si.nMin, si.nMax, si.nPage, si.nPos);
2309         SetScrollInfo(es->hwndSelf, SB_VERT, &si, TRUE);
2310     }
2311
2312     if ((es->style & WS_HSCROLL) && !(es->flags & EF_HSCROLL_TRACK))
2313     {
2314         SCROLLINFO si;
2315         si.cbSize       = sizeof(SCROLLINFO);
2316         si.fMask        = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_DISABLENOSCROLL;
2317         si.nMin         = 0;
2318         si.nMax         = es->text_width - 1;
2319         si.nPage        = es->format_rect.right - es->format_rect.left;
2320         si.nPos         = es->x_offset;
2321         TRACE("SB_HORZ, nMin=%d, nMax=%d, nPage=%d, nPos=%d\n",
2322                 si.nMin, si.nMax, si.nPage, si.nPos);
2323         SetScrollInfo(es->hwndSelf, SB_HORZ, &si, TRUE);
2324     }
2325 }
2326
2327 /*********************************************************************
2328  *
2329  *      EDIT_WordBreakProc
2330  *
2331  *      Find the beginning of words.
2332  *      Note:   unlike the specs for a WordBreakProc, this function only
2333  *              allows to be called without linebreaks between s[0] upto
2334  *              s[count - 1].  Remember it is only called
2335  *              internally, so we can decide this for ourselves.
2336  *
2337  */
2338 static INT CALLBACK EDIT_WordBreakProc(LPWSTR s, INT index, INT count, INT action)
2339 {
2340         INT ret = 0;
2341
2342         TRACE("s=%p, index=%d, count=%d, action=%d\n", s, index, count, action);
2343
2344         if(!s) return 0;
2345
2346         switch (action) {
2347         case WB_LEFT:
2348                 if (!count)
2349                         break;
2350                 if (index)
2351                         index--;
2352                 if (s[index] == ' ') {
2353                         while (index && (s[index] == ' '))
2354                                 index--;
2355                         if (index) {
2356                                 while (index && (s[index] != ' '))
2357                                         index--;
2358                                 if (s[index] == ' ')
2359                                         index++;
2360                         }
2361                 } else {
2362                         while (index && (s[index] != ' '))
2363                                 index--;
2364                         if (s[index] == ' ')
2365                                 index++;
2366                 }
2367                 ret = index;
2368                 break;
2369         case WB_RIGHT:
2370                 if (!count)
2371                         break;
2372                 if (index)
2373                         index--;
2374                 if (s[index] == ' ')
2375                         while ((index < count) && (s[index] == ' ')) index++;
2376                 else {
2377                         while (s[index] && (s[index] != ' ') && (index < count))
2378                                 index++;
2379                         while ((s[index] == ' ') && (index < count)) index++;
2380                 }
2381                 ret = index;
2382                 break;
2383         case WB_ISDELIMITER:
2384                 ret = (s[index] == ' ');
2385                 break;
2386         default:
2387                 ERR("unknown action code, please report !\n");
2388                 break;
2389         }
2390         return ret;
2391 }
2392
2393
2394 /*********************************************************************
2395  *
2396  *      EM_CHARFROMPOS
2397  *
2398  *      returns line number (not index) in high-order word of result.
2399  *      NB : Q137805 is unclear about this. POINT * pointer in lParam apply
2400  *      to Richedit, not to the edit control. Original documentation is valid.
2401  *      FIXME: do the specs mean to return -1 if outside client area or
2402  *              if outside formatting rectangle ???
2403  *
2404  */
2405 static LRESULT EDIT_EM_CharFromPos(EDITSTATE *es, INT x, INT y)
2406 {
2407         POINT pt;
2408         RECT rc;
2409         INT index;
2410
2411         pt.x = x;
2412         pt.y = y;
2413         GetClientRect(es->hwndSelf, &rc);
2414         if (!PtInRect(&rc, pt))
2415                 return -1;
2416
2417         index = EDIT_CharFromPos(es, x, y, NULL);
2418         return MAKELONG(index, EDIT_EM_LineFromChar(es, index));
2419 }
2420
2421
2422 /*********************************************************************
2423  *
2424  *      EM_FMTLINES
2425  *
2426  * Enable or disable soft breaks.
2427  *
2428  * This means: insert or remove the soft linebreak character (\r\r\n).
2429  * Take care to check if the text still fits the buffer after insertion.
2430  * If not, notify with EN_ERRSPACE.
2431  *
2432  */
2433 static BOOL EDIT_EM_FmtLines(EDITSTATE *es, BOOL add_eol)
2434 {
2435         es->flags &= ~EF_USE_SOFTBRK;
2436         if (add_eol) {
2437                 es->flags |= EF_USE_SOFTBRK;
2438                 FIXME("soft break enabled, not implemented\n");
2439         }
2440         return add_eol;
2441 }
2442
2443
2444 /*********************************************************************
2445  *
2446  *      EM_GETHANDLE
2447  *
2448  *      Hopefully this won't fire back at us.
2449  *      We always start with a fixed buffer in the local heap.
2450  *      Despite of the documentation says that the local heap is used
2451  *      only if DS_LOCALEDIT flag is set, NT and 2000 always allocate
2452  *      buffer on the local heap.
2453  *
2454  */
2455 static HLOCAL EDIT_EM_GetHandle(EDITSTATE *es)
2456 {
2457         HLOCAL hLocal;
2458
2459         if (!(es->style & ES_MULTILINE))
2460                 return 0;
2461
2462         if(es->is_unicode)
2463             hLocal = es->hloc32W;
2464         else
2465         {
2466             if(!es->hloc32A)
2467             {
2468                 CHAR *textA;
2469                 UINT countA, alloc_size;
2470                 TRACE("Allocating 32-bit ANSI alias buffer\n");
2471                 countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2472                 alloc_size = ROUND_TO_GROW(countA);
2473                 if(!(es->hloc32A = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
2474                 {
2475                     ERR("Could not allocate %d bytes for 32-bit ANSI alias buffer\n", alloc_size);
2476                     return 0;
2477                 }
2478                 textA = LocalLock(es->hloc32A);
2479                 WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2480                 LocalUnlock(es->hloc32A);
2481             }
2482             hLocal = es->hloc32A;
2483         }
2484
2485         TRACE("Returning %p, LocalSize() = %ld\n", hLocal, LocalSize(hLocal));
2486         return hLocal;
2487 }
2488
2489
2490 /*********************************************************************
2491  *
2492  *      EM_GETHANDLE16
2493  *
2494  *      Hopefully this won't fire back at us.
2495  *      We always start with a buffer in 32 bit linear memory.
2496  *      However, with this message a 16 bit application requests
2497  *      a handle of 16 bit local heap memory, where it expects to find
2498  *      the text.
2499  *      It's a pitty that from this moment on we have to use this
2500  *      local heap, because applications may rely on the handle
2501  *      in the future.
2502  *
2503  *      In this function we'll try to switch to local heap.
2504  */
2505 static HLOCAL16 EDIT_EM_GetHandle16(EDITSTATE *es)
2506 {
2507         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
2508         CHAR *textA;
2509         UINT countA, alloc_size;
2510
2511         if (!(es->style & ES_MULTILINE))
2512                 return 0;
2513
2514         if (es->hloc16)
2515                 return es->hloc16;
2516
2517         if (!LOCAL_HeapSize(hInstance)) {
2518                 if (!LocalInit16(hInstance, 0,
2519                                 GlobalSize16(hInstance))) {
2520                         ERR("could not initialize local heap\n");
2521                         return 0;
2522                 }
2523                 TRACE("local heap initialized\n");
2524         }
2525
2526         countA = WideCharToMultiByte(CP_ACP, 0, es->text, -1, NULL, 0, NULL, NULL);
2527         alloc_size = ROUND_TO_GROW(countA);
2528
2529         TRACE("Allocating 16-bit ANSI alias buffer\n");
2530         if (!(es->hloc16 = LOCAL_Alloc(hInstance, LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size))) {
2531                 ERR("could not allocate new 16 bit buffer\n");
2532                 return 0;
2533         }
2534
2535         if (!(textA = (LPSTR)LOCAL_Lock(hInstance, es->hloc16))) {
2536                 ERR("could not lock new 16 bit buffer\n");
2537                 LOCAL_Free(hInstance, es->hloc16);
2538                 es->hloc16 = 0;
2539                 return 0;
2540         }
2541
2542         WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, countA, NULL, NULL);
2543         LOCAL_Unlock(hInstance, es->hloc16);
2544
2545         TRACE("Returning %04X, LocalSize() = %d\n", es->hloc16, LOCAL_Size(hInstance, es->hloc16));
2546         return es->hloc16;
2547 }
2548
2549
2550 /*********************************************************************
2551  *
2552  *      EM_GETLINE
2553  *
2554  */
2555 static INT EDIT_EM_GetLine(EDITSTATE *es, INT line, LPARAM lParam, BOOL unicode)
2556 {
2557         LPWSTR src;
2558         INT line_len, dst_len;
2559         INT i;
2560
2561         if (es->style & ES_MULTILINE) {
2562                 if (line >= es->line_count)
2563                         return 0;
2564         } else
2565                 line = 0;
2566         i = EDIT_EM_LineIndex(es, line);
2567         src = es->text + i;
2568         line_len = EDIT_EM_LineLength(es, i);
2569         dst_len = *(WORD *)lParam;
2570         if(unicode)
2571         {
2572             LPWSTR dst = (LPWSTR)lParam;
2573             if(dst_len <= line_len)
2574             {
2575                 memcpy(dst, src, dst_len * sizeof(WCHAR));
2576                 return dst_len;
2577             }
2578             else /* Append 0 if enough space */
2579             {
2580                 memcpy(dst, src, line_len * sizeof(WCHAR));
2581                 dst[line_len] = 0;
2582                 return line_len;
2583             }
2584         }
2585         else
2586         {
2587             LPSTR dst = (LPSTR)lParam;
2588             INT ret;
2589             ret = WideCharToMultiByte(CP_ACP, 0, src, line_len, dst, dst_len, NULL, NULL);
2590             if(!ret) /* Insufficient buffer size */
2591                 return dst_len;
2592             if(ret < dst_len) /* Append 0 if enough space */
2593                 dst[ret] = 0;
2594             return ret;
2595         }
2596 }
2597
2598
2599 /*********************************************************************
2600  *
2601  *      EM_GETSEL
2602  *
2603  */
2604 static LRESULT EDIT_EM_GetSel(EDITSTATE *es, PUINT start, PUINT end)
2605 {
2606         UINT s = es->selection_start;
2607         UINT e = es->selection_end;
2608
2609         ORDER_UINT(s, e);
2610         if (start)
2611                 *start = s;
2612         if (end)
2613                 *end = e;
2614         return MAKELONG(s, e);
2615 }
2616
2617
2618 /*********************************************************************
2619  *
2620  *      EM_GETTHUMB
2621  *
2622  *      FIXME: is this right ?  (or should it be only VSCROLL)
2623  *      (and maybe only for edit controls that really have their
2624  *      own scrollbars) (and maybe only for multiline controls ?)
2625  *      All in all: very poorly documented
2626  *
2627  */
2628 static LRESULT EDIT_EM_GetThumb(EDITSTATE *es)
2629 {
2630         return MAKELONG(EDIT_WM_VScroll(es, EM_GETTHUMB16, 0),
2631                 EDIT_WM_HScroll(es, EM_GETTHUMB16, 0));
2632 }
2633
2634
2635 /*********************************************************************
2636  *
2637  *      EM_LINEFROMCHAR
2638  *
2639  */
2640 static INT EDIT_EM_LineFromChar(EDITSTATE *es, INT index)
2641 {
2642         INT line;
2643         LINEDEF *line_def;
2644
2645         if (!(es->style & ES_MULTILINE))
2646                 return 0;
2647         if (index > (INT)strlenW(es->text))
2648                 return es->line_count - 1;
2649         if (index == -1)
2650                 index = min(es->selection_start, es->selection_end);
2651
2652         line = 0;
2653         line_def = es->first_line_def;
2654         index -= line_def->length;
2655         while ((index >= 0) && line_def->next) {
2656                 line++;
2657                 line_def = line_def->next;
2658                 index -= line_def->length;
2659         }
2660         return line;
2661 }
2662
2663
2664 /*********************************************************************
2665  *
2666  *      EM_LINEINDEX
2667  *
2668  */
2669 static INT EDIT_EM_LineIndex(EDITSTATE *es, INT line)
2670 {
2671         INT line_index;
2672         LINEDEF *line_def;
2673
2674         if (!(es->style & ES_MULTILINE))
2675                 return 0;
2676         if (line >= es->line_count)
2677                 return -1;
2678
2679         line_index = 0;
2680         line_def = es->first_line_def;
2681         if (line == -1) {
2682                 INT index = es->selection_end - line_def->length;
2683                 while ((index >= 0) && line_def->next) {
2684                         line_index += line_def->length;
2685                         line_def = line_def->next;
2686                         index -= line_def->length;
2687                 }
2688         } else {
2689                 while (line > 0) {
2690                         line_index += line_def->length;
2691                         line_def = line_def->next;
2692                         line--;
2693                 }
2694         }
2695         return line_index;
2696 }
2697
2698
2699 /*********************************************************************
2700  *
2701  *      EM_LINELENGTH
2702  *
2703  */
2704 static INT EDIT_EM_LineLength(EDITSTATE *es, INT index)
2705 {
2706         LINEDEF *line_def;
2707
2708         if (!(es->style & ES_MULTILINE))
2709                 return strlenW(es->text);
2710
2711         if (index == -1) {
2712                 /* get the number of remaining non-selected chars of selected lines */
2713                 INT32 l; /* line number */
2714                 INT32 li; /* index of first char in line */
2715                 INT32 count;
2716                 l = EDIT_EM_LineFromChar(es, es->selection_start);
2717                 /* # chars before start of selection area */
2718                 count = es->selection_start - EDIT_EM_LineIndex(es, l);
2719                 l = EDIT_EM_LineFromChar(es, es->selection_end);
2720                 /* # chars after end of selection */
2721                 li = EDIT_EM_LineIndex(es, l);
2722                 count += li + EDIT_EM_LineLength(es, li) - es->selection_end;
2723                 return count;
2724         }
2725         line_def = es->first_line_def;
2726         index -= line_def->length;
2727         while ((index >= 0) && line_def->next) {
2728                 line_def = line_def->next;
2729                 index -= line_def->length;
2730         }
2731         return line_def->net_length;
2732 }
2733
2734
2735 /*********************************************************************
2736  *
2737  *      EM_LINESCROLL
2738  *
2739  *      NOTE: dx is in average character widths, dy - in lines;
2740  *
2741  */
2742 static BOOL EDIT_EM_LineScroll(EDITSTATE *es, INT dx, INT dy)
2743 {
2744         if (!(es->style & ES_MULTILINE))
2745                 return FALSE;
2746
2747         dx *= es->char_width;
2748         return EDIT_EM_LineScroll_internal(es, dx, dy);
2749 }
2750
2751 /*********************************************************************
2752  *
2753  *      EDIT_EM_LineScroll_internal
2754  *
2755  *      Version of EDIT_EM_LineScroll for internal use.
2756  *      It doesn't refuse if ES_MULTILINE is set and assumes that
2757  *      dx is in pixels, dy - in lines.
2758  *
2759  */
2760 static BOOL EDIT_EM_LineScroll_internal(EDITSTATE *es, INT dx, INT dy)
2761 {
2762         INT nyoff;
2763         INT x_offset_in_pixels;
2764
2765         if (es->style & ES_MULTILINE)
2766         {
2767             x_offset_in_pixels = es->x_offset;
2768         }
2769         else
2770         {
2771             dy = 0;
2772             x_offset_in_pixels = (short)LOWORD(EDIT_EM_PosFromChar(es, es->x_offset, FALSE));
2773         }
2774
2775         if (-dx > x_offset_in_pixels)
2776                 dx = -x_offset_in_pixels;
2777         if (dx > es->text_width - x_offset_in_pixels)
2778                 dx = es->text_width - x_offset_in_pixels;
2779         nyoff = max(0, es->y_offset + dy);
2780         if (nyoff >= es->line_count)
2781                 nyoff = es->line_count - 1;
2782         dy = (es->y_offset - nyoff) * es->line_height;
2783         if (dx || dy) {
2784                 RECT rc1;
2785                 RECT rc;
2786
2787                 es->y_offset = nyoff;
2788                 if(es->style & ES_MULTILINE)
2789                     es->x_offset += dx;
2790                 else
2791                     es->x_offset += dx / es->char_width;
2792
2793                 GetClientRect(es->hwndSelf, &rc1);
2794                 IntersectRect(&rc, &rc1, &es->format_rect);
2795                 ScrollWindowEx(es->hwndSelf, -dx, dy,
2796                                 NULL, &rc, NULL, NULL, SW_INVALIDATE);
2797                 /* force scroll info update */
2798                 EDIT_UpdateScrollInfo(es);
2799         }
2800         if (dx && !(es->flags & EF_HSCROLL_TRACK))
2801                 EDIT_NOTIFY_PARENT(es, EN_HSCROLL, "EN_HSCROLL");
2802         if (dy && !(es->flags & EF_VSCROLL_TRACK))
2803                 EDIT_NOTIFY_PARENT(es, EN_VSCROLL, "EN_VSCROLL");
2804         return TRUE;
2805 }
2806
2807
2808 /*********************************************************************
2809  *
2810  *      EM_POSFROMCHAR
2811  *
2812  */
2813 static LRESULT EDIT_EM_PosFromChar(EDITSTATE *es, INT index, BOOL after_wrap)
2814 {
2815         INT len = strlenW(es->text);
2816         INT l;
2817         INT li;
2818         INT x;
2819         INT y = 0;
2820         HDC dc;
2821         HFONT old_font = 0;
2822         SIZE size;
2823
2824         index = min(index, len);
2825         dc = GetDC(es->hwndSelf);
2826         if (es->font)
2827                 old_font = SelectObject(dc, es->font);
2828         if (es->style & ES_MULTILINE) {
2829                 l = EDIT_EM_LineFromChar(es, index);
2830                 y = (l - es->y_offset) * es->line_height;
2831                 li = EDIT_EM_LineIndex(es, l);
2832                 if (after_wrap && (li == index) && l) {
2833                         INT l2 = l - 1;
2834                         LINEDEF *line_def = es->first_line_def;
2835                         while (l2) {
2836                                 line_def = line_def->next;
2837                                 l2--;
2838                         }
2839                         if (line_def->ending == END_WRAP) {
2840                                 l--;
2841                                 y -= es->line_height;
2842                                 li = EDIT_EM_LineIndex(es, l);
2843                         }
2844                 }
2845                 x = LOWORD(GetTabbedTextExtentW(dc, es->text + li, index - li,
2846                                 es->tabs_count, es->tabs)) - es->x_offset;
2847         } else {
2848                 LPWSTR text = EDIT_GetPasswordPointer_SL(es);
2849                 if (index < es->x_offset) {
2850                         GetTextExtentPoint32W(dc, text + index,
2851                                         es->x_offset - index, &size);
2852                         x = -size.cx;
2853                 } else {
2854                         GetTextExtentPoint32W(dc, text + es->x_offset,
2855                                         index - es->x_offset, &size);
2856                          x = size.cx;
2857                 }
2858                 y = 0;
2859                 if (es->style & ES_PASSWORD)
2860                         HeapFree(GetProcessHeap(), 0, text);
2861         }
2862         x += es->format_rect.left;
2863         y += es->format_rect.top;
2864         if (es->font)
2865                 SelectObject(dc, old_font);
2866         ReleaseDC(es->hwndSelf, dc);
2867         return MAKELONG((INT16)x, (INT16)y);
2868 }
2869
2870
2871 /*********************************************************************
2872  *
2873  *      EM_REPLACESEL
2874  *
2875  *      FIXME: handle ES_NUMBER and ES_OEMCONVERT here
2876  *
2877  */
2878 static void EDIT_EM_ReplaceSel(EDITSTATE *es, BOOL can_undo, LPCWSTR lpsz_replace, BOOL send_update, BOOL honor_limit)
2879 {
2880         UINT strl = strlenW(lpsz_replace);
2881         UINT tl = strlenW(es->text);
2882         UINT utl;
2883         UINT s;
2884         UINT e;
2885         UINT i;
2886         LPWSTR p;
2887         HRGN hrgn = 0;
2888
2889         TRACE("%s, can_undo %d, send_update %d\n",
2890             debugstr_w(lpsz_replace), can_undo, send_update);
2891
2892         s = es->selection_start;
2893         e = es->selection_end;
2894
2895         if ((s == e) && !strl)
2896                 return;
2897
2898         ORDER_UINT(s, e);
2899
2900         if (!EDIT_MakeFit(es, tl - (e - s) + strl, honor_limit))
2901                 return;
2902
2903         if (e != s) {
2904                 /* there is something to be deleted */
2905                 TRACE("deleting stuff.\n");
2906                 if (can_undo) {
2907                         utl = strlenW(es->undo_text);
2908                         if (!es->undo_insert_count && (*es->undo_text && (s == es->undo_position))) {
2909                                 /* undo-buffer is extended to the right */
2910                                 EDIT_MakeUndoFit(es, utl + e - s);
2911                                 strncpyW(es->undo_text + utl, es->text + s, e - s + 1);
2912                                 (es->undo_text + utl)[e - s] = 0; /* ensure 0 termination */
2913                         } else if (!es->undo_insert_count && (*es->undo_text && (e == es->undo_position))) {
2914                                 /* undo-buffer is extended to the left */
2915                                 EDIT_MakeUndoFit(es, utl + e - s);
2916                                 for (p = es->undo_text + utl ; p >= es->undo_text ; p--)
2917                                         p[e - s] = p[0];
2918                                 for (i = 0 , p = es->undo_text ; i < e - s ; i++)
2919                                         p[i] = (es->text + s)[i];
2920                                 es->undo_position = s;
2921                         } else {
2922                                 /* new undo-buffer */
2923                                 EDIT_MakeUndoFit(es, e - s);
2924                                 strncpyW(es->undo_text, es->text + s, e - s + 1);
2925                                 es->undo_text[e - s] = 0; /* ensure 0 termination */
2926                                 es->undo_position = s;
2927                         }
2928                         /* any deletion makes the old insertion-undo invalid */
2929                         es->undo_insert_count = 0;
2930                 } else
2931                         EDIT_EM_EmptyUndoBuffer(es);
2932
2933                 /* now delete */
2934                 strcpyW(es->text + s, es->text + e);
2935         }
2936         if (strl) {
2937                 /* there is an insertion */
2938                 if (can_undo) {
2939                         if ((s == es->undo_position) ||
2940                                         ((es->undo_insert_count) &&
2941                                         (s == es->undo_position + es->undo_insert_count)))
2942                                 /*
2943                                  * insertion is new and at delete position or
2944                                  * an extension to either left or right
2945                                  */
2946                                 es->undo_insert_count += strl;
2947                         else {
2948                                 /* new insertion undo */
2949                                 es->undo_position = s;
2950                                 es->undo_insert_count = strl;
2951                                 /* new insertion makes old delete-buffer invalid */
2952                                 *es->undo_text = '\0';
2953                         }
2954                 } else
2955                         EDIT_EM_EmptyUndoBuffer(es);
2956
2957                 /* now insert */
2958                 tl = strlenW(es->text);
2959                 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));
2960                 for (p = es->text + tl ; p >= es->text + s ; p--)
2961                         p[strl] = p[0];
2962                 for (i = 0 , p = es->text + s ; i < strl ; i++)
2963                         p[i] = lpsz_replace[i];
2964                 if(es->style & ES_UPPERCASE)
2965                         CharUpperBuffW(p, strl);
2966                 else if(es->style & ES_LOWERCASE)
2967                         CharLowerBuffW(p, strl);
2968                 s += strl;
2969         }
2970         if (es->style & ES_MULTILINE)
2971         {
2972                 INT s = min(es->selection_start, es->selection_end);
2973
2974                 hrgn = CreateRectRgn(0, 0, 0, 0);
2975                 EDIT_BuildLineDefs_ML(es, s, s + strl,
2976                                 strl - abs(es->selection_end - es->selection_start), hrgn);
2977         }
2978         else
2979             EDIT_CalcLineWidth_SL(es);
2980
2981         EDIT_EM_SetSel(es, s, s, FALSE);
2982         es->flags |= EF_MODIFIED;
2983         if (send_update) es->flags |= EF_UPDATE;
2984         if (hrgn)
2985         {
2986                 EDIT_UpdateTextRegion(es, hrgn, TRUE);
2987                 DeleteObject(hrgn);
2988         }
2989         else
2990             EDIT_UpdateText(es, NULL, TRUE);
2991
2992         EDIT_EM_ScrollCaret(es);
2993
2994         /* force scroll info update */
2995         EDIT_UpdateScrollInfo(es);
2996
2997
2998         if(es->flags & EF_UPDATE)
2999         {
3000             es->flags &= ~EF_UPDATE;
3001             EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
3002         }
3003 }
3004
3005
3006 /*********************************************************************
3007  *
3008  *      EM_SCROLL
3009  *
3010  */
3011 static LRESULT EDIT_EM_Scroll(EDITSTATE *es, INT action)
3012 {
3013         INT dy;
3014
3015         if (!(es->style & ES_MULTILINE))
3016                 return (LRESULT)FALSE;
3017
3018         dy = 0;
3019
3020         switch (action) {
3021         case SB_LINEUP:
3022                 if (es->y_offset)
3023                         dy = -1;
3024                 break;
3025         case SB_LINEDOWN:
3026                 if (es->y_offset < es->line_count - 1)
3027                         dy = 1;
3028                 break;
3029         case SB_PAGEUP:
3030                 if (es->y_offset)
3031                         dy = -(es->format_rect.bottom - es->format_rect.top) / es->line_height;
3032                 break;
3033         case SB_PAGEDOWN:
3034                 if (es->y_offset < es->line_count - 1)
3035                         dy = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3036                 break;
3037         default:
3038                 return (LRESULT)FALSE;
3039         }
3040         if (dy) {
3041             INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3042             /* check if we are going to move too far */
3043             if(es->y_offset + dy > es->line_count - vlc)
3044                 dy = es->line_count - vlc - es->y_offset;
3045
3046             /* Notification is done in EDIT_EM_LineScroll */
3047             if(dy)
3048                 EDIT_EM_LineScroll(es, 0, dy);
3049         }
3050         return MAKELONG((INT16)dy, (BOOL16)TRUE);
3051 }
3052
3053
3054 /*********************************************************************
3055  *
3056  *      EM_SCROLLCARET
3057  *
3058  */
3059 static void EDIT_EM_ScrollCaret(EDITSTATE *es)
3060 {
3061         if (es->style & ES_MULTILINE) {
3062                 INT l;
3063                 INT li;
3064                 INT vlc;
3065                 INT ww;
3066                 INT cw = es->char_width;
3067                 INT x;
3068                 INT dy = 0;
3069                 INT dx = 0;
3070
3071                 l = EDIT_EM_LineFromChar(es, es->selection_end);
3072                 li = EDIT_EM_LineIndex(es, l);
3073                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, es->flags & EF_AFTER_WRAP));
3074                 vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
3075                 if (l >= es->y_offset + vlc)
3076                         dy = l - vlc + 1 - es->y_offset;
3077                 if (l < es->y_offset)
3078                         dy = l - es->y_offset;
3079                 ww = es->format_rect.right - es->format_rect.left;
3080                 if (x < es->format_rect.left)
3081                         dx = x - es->format_rect.left - ww / HSCROLL_FRACTION / cw * cw;
3082                 if (x > es->format_rect.right)
3083                         dx = x - es->format_rect.left - (HSCROLL_FRACTION - 1) * ww / HSCROLL_FRACTION / cw * cw;
3084                 if (dy || dx)
3085                 {
3086                     /* check if we are going to move too far */
3087                     if(es->x_offset + dx + ww > es->text_width)
3088                         dx = es->text_width - ww - es->x_offset;
3089                     if(dx || dy)
3090                         EDIT_EM_LineScroll_internal(es, dx, dy);
3091                 }
3092         } else {
3093                 INT x;
3094                 INT goal;
3095                 INT format_width;
3096
3097                 if (!(es->style & ES_AUTOHSCROLL))
3098                         return;
3099
3100                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3101                 format_width = es->format_rect.right - es->format_rect.left;
3102                 if (x < es->format_rect.left) {
3103                         goal = es->format_rect.left + format_width / HSCROLL_FRACTION;
3104                         do {
3105                                 es->x_offset--;
3106                                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3107                         } while ((x < goal) && es->x_offset);
3108                         /* FIXME: use ScrollWindow() somehow to improve performance */
3109                         EDIT_UpdateText(es, NULL, TRUE);
3110                 } else if (x > es->format_rect.right) {
3111                         INT x_last;
3112                         INT len = strlenW(es->text);
3113                         goal = es->format_rect.right - format_width / HSCROLL_FRACTION;
3114                         do {
3115                                 es->x_offset++;
3116                                 x = (short)LOWORD(EDIT_EM_PosFromChar(es, es->selection_end, FALSE));
3117                                 x_last = (short)LOWORD(EDIT_EM_PosFromChar(es, len, FALSE));
3118                         } while ((x > goal) && (x_last > es->format_rect.right));
3119                         /* FIXME: use ScrollWindow() somehow to improve performance */
3120                         EDIT_UpdateText(es, NULL, TRUE);
3121                 }
3122         }
3123
3124     if(es->flags & EF_FOCUSED)
3125         EDIT_SetCaretPos(es, es->selection_end, es->flags & EF_AFTER_WRAP);
3126 }
3127
3128
3129 /*********************************************************************
3130  *
3131  *      EM_SETHANDLE
3132  *
3133  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3134  *
3135  */
3136 static void EDIT_EM_SetHandle(EDITSTATE *es, HLOCAL hloc)
3137 {
3138         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
3139
3140         if (!(es->style & ES_MULTILINE))
3141                 return;
3142
3143         if (!hloc) {
3144                 WARN("called with NULL handle\n");
3145                 return;
3146         }
3147
3148         EDIT_UnlockBuffer(es, TRUE);
3149
3150         if(es->hloc16)
3151         {
3152             LOCAL_Free(hInstance, es->hloc16);
3153             es->hloc16 = (HLOCAL16)NULL;
3154         }
3155
3156         if(es->is_unicode)
3157         {
3158             if(es->hloc32A)
3159             {
3160                 LocalFree(es->hloc32A);
3161                 es->hloc32A = NULL;
3162             }
3163             es->hloc32W = hloc;
3164         }
3165         else
3166         {
3167             INT countW, countA;
3168             HLOCAL hloc32W_new;
3169             WCHAR *textW;
3170             CHAR *textA;
3171
3172             countA = LocalSize(hloc);
3173             textA = LocalLock(hloc);
3174             countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3175             if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3176             {
3177                 ERR("Could not allocate new unicode buffer\n");
3178                 return;
3179             }
3180             textW = LocalLock(hloc32W_new);
3181             MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3182             LocalUnlock(hloc32W_new);
3183             LocalUnlock(hloc);
3184
3185             if(es->hloc32W)
3186                 LocalFree(es->hloc32W);
3187
3188             es->hloc32W = hloc32W_new;
3189             es->hloc32A = hloc;
3190         }
3191
3192         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3193
3194         EDIT_LockBuffer(es);
3195
3196         es->x_offset = es->y_offset = 0;
3197         es->selection_start = es->selection_end = 0;
3198         EDIT_EM_EmptyUndoBuffer(es);
3199         es->flags &= ~EF_MODIFIED;
3200         es->flags &= ~EF_UPDATE;
3201         EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3202         EDIT_UpdateText(es, NULL, TRUE);
3203         EDIT_EM_ScrollCaret(es);
3204         /* force scroll info update */
3205         EDIT_UpdateScrollInfo(es);
3206 }
3207
3208
3209 /*********************************************************************
3210  *
3211  *      EM_SETHANDLE16
3212  *
3213  *      FIXME:  ES_LOWERCASE, ES_UPPERCASE, ES_OEMCONVERT, ES_NUMBER ???
3214  *
3215  */
3216 static void EDIT_EM_SetHandle16(EDITSTATE *es, HLOCAL16 hloc)
3217 {
3218         HINSTANCE16 hInstance = GetWindowLongW( es->hwndSelf, GWL_HINSTANCE );
3219         INT countW, countA;
3220         HLOCAL hloc32W_new;
3221         WCHAR *textW;
3222         CHAR *textA;
3223
3224         if (!(es->style & ES_MULTILINE))
3225                 return;
3226
3227         if (!hloc) {
3228                 WARN("called with NULL handle\n");
3229                 return;
3230         }
3231
3232         EDIT_UnlockBuffer(es, TRUE);
3233
3234         if(es->hloc32A)
3235         {
3236             LocalFree(es->hloc32A);
3237             es->hloc32A = NULL;
3238         }
3239
3240         countA = LOCAL_Size(hInstance, hloc);
3241         textA = LOCAL_Lock(hInstance, hloc);
3242         countW = MultiByteToWideChar(CP_ACP, 0, textA, countA, NULL, 0);
3243         if(!(hloc32W_new = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, countW * sizeof(WCHAR))))
3244         {
3245             ERR("Could not allocate new unicode buffer\n");
3246             return;
3247         }
3248         textW = LocalLock(hloc32W_new);
3249         MultiByteToWideChar(CP_ACP, 0, textA, countA, textW, countW);
3250         LocalUnlock(hloc32W_new);
3251         LOCAL_Unlock(hInstance, hloc);
3252
3253         if(es->hloc32W)
3254             LocalFree(es->hloc32W);
3255
3256         es->hloc32W = hloc32W_new;
3257         es->hloc16 = hloc;
3258
3259         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
3260
3261         EDIT_LockBuffer(es);
3262
3263         es->x_offset = es->y_offset = 0;
3264         es->selection_start = es->selection_end = 0;
3265         EDIT_EM_EmptyUndoBuffer(es);
3266         es->flags &= ~EF_MODIFIED;
3267         es->flags &= ~EF_UPDATE;
3268         EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3269         EDIT_UpdateText(es, NULL, TRUE);
3270         EDIT_EM_ScrollCaret(es);
3271         /* force scroll info update */
3272         EDIT_UpdateScrollInfo(es);
3273 }
3274
3275
3276 /*********************************************************************
3277  *
3278  *      EM_SETLIMITTEXT
3279  *
3280  *      FIXME: in WinNT maxsize is 0x7FFFFFFF / 0xFFFFFFFF
3281  *      However, the windows version is not complied to yet in all of edit.c
3282  *
3283  *  Additionally as the wrapper for RichEdit controls we need larger buffers
3284  *  at present -1 will represent nolimit
3285  */
3286 static void EDIT_EM_SetLimitText(EDITSTATE *es, INT limit)
3287 {
3288     if (limit == 0xFFFFFFFF)
3289         es->buffer_limit = -1;
3290     else if (es->style & ES_MULTILINE) {
3291                 if (limit)
3292                         es->buffer_limit = min(limit, BUFLIMIT_MULTI);
3293                 else
3294                         es->buffer_limit = BUFLIMIT_MULTI;
3295         } else {
3296                 if (limit)
3297                         es->buffer_limit = min(limit, BUFLIMIT_SINGLE);
3298                 else
3299                         es->buffer_limit = BUFLIMIT_SINGLE;
3300         }
3301 }
3302
3303
3304 /*********************************************************************
3305  *
3306  *      EM_SETMARGINS
3307  *
3308  * EC_USEFONTINFO is used as a left or right value i.e. lParam and not as an
3309  * action wParam despite what the docs say. EC_USEFONTINFO calculates the
3310  * margin according to the textmetrics of the current font.
3311  *
3312  * FIXME - With TrueType or vector fonts EC_USEFONTINFO currently sets one third
3313  * of the char's width as the margin, but this is not how Windows handles this.
3314  * For all other fonts Windows sets the margins to zero.
3315  *
3316  */
3317 static void EDIT_EM_SetMargins(EDITSTATE *es, INT action,
3318                                INT left, INT right)
3319 {
3320         TEXTMETRICW tm;
3321         INT default_left_margin  = 0; /* in pixels */
3322         INT default_right_margin = 0; /* in pixels */
3323
3324         /* Set the default margins depending on the font */
3325         if (es->font && (left == EC_USEFONTINFO || right == EC_USEFONTINFO)) {
3326             HDC dc = GetDC(es->hwndSelf);
3327             HFONT old_font = SelectObject(dc, es->font);
3328             GetTextMetricsW(dc, &tm);
3329             /* The default margins are only non zero for TrueType or Vector fonts */
3330             if (tm.tmPitchAndFamily & ( TMPF_VECTOR | TMPF_TRUETYPE )) {
3331                 /* This must be calculated more exactly! But how? */
3332                 default_left_margin = tm.tmAveCharWidth / 3;
3333                 default_right_margin = tm.tmAveCharWidth / 3;
3334             }
3335             SelectObject(dc, old_font);
3336             ReleaseDC(es->hwndSelf, dc);
3337         }
3338
3339         if (action & EC_LEFTMARGIN) {
3340                 if (left != EC_USEFONTINFO)
3341                         es->left_margin = left;
3342                 else
3343                         es->left_margin = default_left_margin;
3344         }
3345
3346         if (action & EC_RIGHTMARGIN) {
3347                 if (right != EC_USEFONTINFO)
3348                         es->right_margin = right;
3349                 else
3350                         es->right_margin = default_right_margin;
3351         }
3352         TRACE("left=%d, right=%d\n", es->left_margin, es->right_margin);
3353 }
3354
3355
3356 /*********************************************************************
3357  *
3358  *      EM_SETPASSWORDCHAR
3359  *
3360  */
3361 static void EDIT_EM_SetPasswordChar(EDITSTATE *es, WCHAR c)
3362 {
3363         LONG style;
3364
3365         if (es->style & ES_MULTILINE)
3366                 return;
3367
3368         if (es->password_char == c)
3369                 return;
3370
3371         style = GetWindowLongW( es->hwndSelf, GWL_STYLE );
3372         es->password_char = c;
3373         if (c) {
3374             SetWindowLongW( es->hwndSelf, GWL_STYLE, style | ES_PASSWORD );
3375             es->style |= ES_PASSWORD;
3376         } else {
3377             SetWindowLongW( es->hwndSelf, GWL_STYLE, style & ~ES_PASSWORD );
3378             es->style &= ~ES_PASSWORD;
3379         }
3380         EDIT_UpdateText(es, NULL, TRUE);
3381 }
3382
3383
3384 /*********************************************************************
3385  *
3386  *      EDIT_EM_SetSel
3387  *
3388  *      note:   unlike the specs say: the order of start and end
3389  *              _is_ preserved in Windows.  (i.e. start can be > end)
3390  *              In other words: this handler is OK
3391  *
3392  */
3393 static void EDIT_EM_SetSel(EDITSTATE *es, UINT start, UINT end, BOOL after_wrap)
3394 {
3395         UINT old_start = es->selection_start;
3396         UINT old_end = es->selection_end;
3397         UINT len = strlenW(es->text);
3398
3399         if (start == (UINT)-1) {
3400                 start = es->selection_end;
3401                 end = es->selection_end;
3402         } else {
3403                 start = min(start, len);
3404                 end = min(end, len);
3405         }
3406         es->selection_start = start;
3407         es->selection_end = end;
3408         if (after_wrap)
3409                 es->flags |= EF_AFTER_WRAP;
3410         else
3411                 es->flags &= ~EF_AFTER_WRAP;
3412 /* This is a little bit more efficient than before, not sure if it can be improved. FIXME? */
3413         ORDER_UINT(start, end);
3414         ORDER_UINT(end, old_end);
3415         ORDER_UINT(start, old_start);
3416         ORDER_UINT(old_start, old_end);
3417         if (end != old_start)
3418         {
3419 /*
3420  * One can also do
3421  *          ORDER_UINT32(end, old_start);
3422  *          EDIT_InvalidateText(es, start, end);
3423  *          EDIT_InvalidateText(es, old_start, old_end);
3424  * in place of the following if statement.
3425  */
3426             if (old_start > end )
3427             {
3428                 EDIT_InvalidateText(es, start, end);
3429                 EDIT_InvalidateText(es, old_start, old_end);
3430             }
3431             else
3432             {
3433                 EDIT_InvalidateText(es, start, old_start);
3434                 EDIT_InvalidateText(es, end, old_end);
3435             }
3436         }
3437         else EDIT_InvalidateText(es, start, old_end);
3438 }
3439
3440
3441 /*********************************************************************
3442  *
3443  *      EM_SETTABSTOPS
3444  *
3445  */
3446 static BOOL EDIT_EM_SetTabStops(EDITSTATE *es, INT count, LPINT tabs)
3447 {
3448         if (!(es->style & ES_MULTILINE))
3449                 return FALSE;
3450         if (es->tabs)
3451                 HeapFree(GetProcessHeap(), 0, es->tabs);
3452         es->tabs_count = count;
3453         if (!count)
3454                 es->tabs = NULL;
3455         else {
3456                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3457                 memcpy(es->tabs, tabs, count * sizeof(INT));
3458         }
3459         return TRUE;
3460 }
3461
3462
3463 /*********************************************************************
3464  *
3465  *      EM_SETTABSTOPS16
3466  *
3467  */
3468 static BOOL EDIT_EM_SetTabStops16(EDITSTATE *es, INT count, LPINT16 tabs)
3469 {
3470         if (!(es->style & ES_MULTILINE))
3471                 return FALSE;
3472         if (es->tabs)
3473                 HeapFree(GetProcessHeap(), 0, es->tabs);
3474         es->tabs_count = count;
3475         if (!count)
3476                 es->tabs = NULL;
3477         else {
3478                 INT i;
3479                 es->tabs = HeapAlloc(GetProcessHeap(), 0, count * sizeof(INT));
3480                 for (i = 0 ; i < count ; i++)
3481                         es->tabs[i] = *tabs++;
3482         }
3483         return TRUE;
3484 }
3485
3486
3487 /*********************************************************************
3488  *
3489  *      EM_SETWORDBREAKPROC
3490  *
3491  */
3492 static void EDIT_EM_SetWordBreakProc(EDITSTATE *es, LPARAM lParam)
3493 {
3494         if (es->word_break_proc == (void *)lParam)
3495                 return;
3496
3497         es->word_break_proc = (void *)lParam;
3498         es->word_break_proc16 = NULL;
3499
3500         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3501                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3502                 EDIT_UpdateText(es, NULL, TRUE);
3503         }
3504 }
3505
3506
3507 /*********************************************************************
3508  *
3509  *      EM_SETWORDBREAKPROC16
3510  *
3511  */
3512 static void EDIT_EM_SetWordBreakProc16(EDITSTATE *es, EDITWORDBREAKPROC16 wbp)
3513 {
3514         if (es->word_break_proc16 == wbp)
3515                 return;
3516
3517         es->word_break_proc = NULL;
3518         es->word_break_proc16 = wbp;
3519         if ((es->style & ES_MULTILINE) && !(es->style & ES_AUTOHSCROLL)) {
3520                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
3521                 EDIT_UpdateText(es, NULL, TRUE);
3522         }
3523 }
3524
3525
3526 /*********************************************************************
3527  *
3528  *      EM_UNDO / WM_UNDO
3529  *
3530  */
3531 static BOOL EDIT_EM_Undo(EDITSTATE *es)
3532 {
3533         INT ulength;
3534         LPWSTR utext;
3535
3536         /* Protect read-only edit control from modification */
3537         if(es->style & ES_READONLY)
3538             return FALSE;
3539
3540         ulength = strlenW(es->undo_text);
3541         utext = HeapAlloc(GetProcessHeap(), 0, (ulength + 1) * sizeof(WCHAR));
3542
3543         strcpyW(utext, es->undo_text);
3544
3545         TRACE("before UNDO:insertion length = %d, deletion buffer = %s\n",
3546                      es->undo_insert_count, debugstr_w(utext));
3547
3548         EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3549         EDIT_EM_EmptyUndoBuffer(es);
3550         EDIT_EM_ReplaceSel(es, TRUE, utext, FALSE, TRUE);
3551         EDIT_EM_SetSel(es, es->undo_position, es->undo_position + es->undo_insert_count, FALSE);
3552         /* send the notification after the selection start and end are set */
3553         EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
3554         EDIT_EM_ScrollCaret(es);
3555         HeapFree(GetProcessHeap(), 0, utext);
3556
3557         TRACE("after UNDO:insertion length = %d, deletion buffer = %s\n",
3558                         es->undo_insert_count, debugstr_w(es->undo_text));
3559         return TRUE;
3560 }
3561
3562
3563 /*********************************************************************
3564  *
3565  *      WM_CHAR
3566  *
3567  */
3568 static void EDIT_WM_Char(EDITSTATE *es, WCHAR c)
3569 {
3570         BOOL control;
3571
3572         /* Protect read-only edit control from modification */
3573         if(es->style & ES_READONLY)
3574             return;
3575
3576         control = GetKeyState(VK_CONTROL) & 0x8000;
3577
3578         switch (c) {
3579         case '\r':
3580             /* If the edit doesn't want the return and it's not a multiline edit, do nothing */
3581             if(!(es->style & ES_MULTILINE) && !(es->style & ES_WANTRETURN))
3582                 break;
3583         case '\n':
3584                 if (es->style & ES_MULTILINE) {
3585                         if (es->style & ES_READONLY) {
3586                                 EDIT_MoveHome(es, FALSE);
3587                                 EDIT_MoveDown_ML(es, FALSE);
3588                         } else {
3589                                 static const WCHAR cr_lfW[] = {'\r','\n',0};
3590                                 EDIT_EM_ReplaceSel(es, TRUE, cr_lfW, TRUE, TRUE);
3591                         }
3592                 }
3593                 break;
3594         case '\t':
3595                 if ((es->style & ES_MULTILINE) && !(es->style & ES_READONLY))
3596                 {
3597                         static const WCHAR tabW[] = {'\t',0};
3598                         EDIT_EM_ReplaceSel(es, TRUE, tabW, TRUE, TRUE);
3599                 }
3600                 break;
3601         case VK_BACK:
3602                 if (!(es->style & ES_READONLY) && !control) {
3603                         if (es->selection_start != es->selection_end)
3604                                 EDIT_WM_Clear(es);
3605                         else {
3606                                 /* delete character left of caret */
3607                                 EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
3608                                 EDIT_MoveBackward(es, TRUE);
3609                                 EDIT_WM_Clear(es);
3610                         }
3611                 }
3612                 break;
3613         case 0x03: /* ^C */
3614                 SendMessageW(es->hwndSelf, WM_COPY, 0, 0);
3615                 break;
3616         case 0x16: /* ^V */
3617                 SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
3618                 break;
3619         case 0x18: /* ^X */
3620                 SendMessageW(es->hwndSelf, WM_CUT, 0, 0);
3621                 break;
3622
3623         default:
3624                 if (!(es->style & ES_READONLY) && (c >= ' ') && (c != 127)) {
3625                         WCHAR str[2];
3626                         str[0] = c;
3627                         str[1] = '\0';
3628                         EDIT_EM_ReplaceSel(es, TRUE, str, TRUE, TRUE);
3629                 }
3630                 break;
3631         }
3632 }
3633
3634
3635 /*********************************************************************
3636  *
3637  *      WM_COMMAND
3638  *
3639  */
3640 static void EDIT_WM_Command(EDITSTATE *es, INT code, INT id, HWND control)
3641 {
3642         if (code || control)
3643                 return;
3644
3645         switch (id) {
3646                 case EM_UNDO:
3647                         EDIT_EM_Undo(es);
3648                         break;
3649                 case WM_CUT:
3650                         EDIT_WM_Cut(es);
3651                         break;
3652                 case WM_COPY:
3653                         EDIT_WM_Copy(es);
3654                         break;
3655                 case WM_PASTE:
3656                         EDIT_WM_Paste(es);
3657                         break;
3658                 case WM_CLEAR:
3659                         EDIT_WM_Clear(es);
3660                         break;
3661                 case EM_SETSEL:
3662                         EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
3663                         EDIT_EM_ScrollCaret(es);
3664                         break;
3665                 default:
3666                         ERR("unknown menu item, please report\n");
3667                         break;
3668         }
3669 }
3670
3671
3672 /*********************************************************************
3673  *
3674  *      WM_CONTEXTMENU
3675  *
3676  *      Note: the resource files resource/sysres_??.rc cannot define a
3677  *              single popup menu.  Hence we use a (dummy) menubar
3678  *              containing the single popup menu as its first item.
3679  *
3680  *      FIXME: the message identifiers have been chosen arbitrarily,
3681  *              hence we use MF_BYPOSITION.
3682  *              We might as well use the "real" values (anybody knows ?)
3683  *              The menu definition is in resources/sysres_??.rc.
3684  *              Once these are OK, we better use MF_BYCOMMAND here
3685  *              (as we do in EDIT_WM_Command()).
3686  *
3687  */
3688 static void EDIT_WM_ContextMenu(EDITSTATE *es, INT x, INT y)
3689 {
3690         HMENU menu = LoadMenuA(GetModuleHandleA("USER32"), "EDITMENU");
3691         HMENU popup = GetSubMenu(menu, 0);
3692         UINT start = es->selection_start;
3693         UINT end = es->selection_end;
3694
3695         ORDER_UINT(start, end);
3696
3697         /* undo */
3698         EnableMenuItem(popup, 0, MF_BYPOSITION | (EDIT_EM_CanUndo(es) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3699         /* cut */
3700         EnableMenuItem(popup, 2, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3701         /* copy */
3702         EnableMenuItem(popup, 3, MF_BYPOSITION | ((end - start) && !(es->style & ES_PASSWORD) ? MF_ENABLED : MF_GRAYED));
3703         /* paste */
3704         EnableMenuItem(popup, 4, MF_BYPOSITION | (IsClipboardFormatAvailable(CF_UNICODETEXT) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3705         /* delete */
3706         EnableMenuItem(popup, 5, MF_BYPOSITION | ((end - start) && !(es->style & ES_READONLY) ? MF_ENABLED : MF_GRAYED));
3707         /* select all */
3708         EnableMenuItem(popup, 7, MF_BYPOSITION | (start || (end != strlenW(es->text)) ? MF_ENABLED : MF_GRAYED));
3709
3710         TrackPopupMenu(popup, TPM_LEFTALIGN | TPM_RIGHTBUTTON, x, y, 0, es->hwndSelf, NULL);
3711         DestroyMenu(menu);
3712 }
3713
3714
3715 /*********************************************************************
3716  *
3717  *      WM_COPY
3718  *
3719  */
3720 static void EDIT_WM_Copy(EDITSTATE *es)
3721 {
3722         INT s = min(es->selection_start, es->selection_end);
3723         INT e = max(es->selection_start, es->selection_end);
3724         HGLOBAL hdst;
3725         LPWSTR dst;
3726
3727         if (e == s) return;
3728
3729         hdst = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, (DWORD)(e - s + 1) * sizeof(WCHAR));
3730         dst = GlobalLock(hdst);
3731         strncpyW(dst, es->text + s, e - s);
3732         dst[e - s] = 0; /* ensure 0 termination */
3733         TRACE("%s\n", debugstr_w(dst));
3734         GlobalUnlock(hdst);
3735         OpenClipboard(es->hwndSelf);
3736         EmptyClipboard();
3737         SetClipboardData(CF_UNICODETEXT, hdst);
3738         CloseClipboard();
3739 }
3740
3741
3742 /*********************************************************************
3743  *
3744  *      WM_CREATE
3745  *
3746  */
3747 static LRESULT EDIT_WM_Create(EDITSTATE *es, LPCWSTR name)
3748 {
3749         TRACE("%s\n", debugstr_w(name));
3750        /*
3751         *       To initialize some final structure members, we call some helper
3752         *       functions.  However, since the EDITSTATE is not consistent (i.e.
3753         *       not fully initialized), we should be very careful which
3754         *       functions can be called, and in what order.
3755         */
3756         EDIT_WM_SetFont(es, 0, FALSE);
3757         EDIT_EM_EmptyUndoBuffer(es);
3758
3759        if (name && *name) {
3760            EDIT_EM_ReplaceSel(es, FALSE, name, FALSE, TRUE);
3761            /* if we insert text to the editline, the text scrolls out
3762             * of the window, as the caret is placed after the insert
3763             * pos normally; thus we reset es->selection... to 0 and
3764             * update caret
3765             */
3766            es->selection_start = es->selection_end = 0;
3767            /* Adobe Photoshop does NOT like this. and MSDN says that EN_CHANGE
3768             * Messages are only to be sent when the USER does something to
3769             * change the contents. So I am removing this EN_CHANGE
3770             *
3771             * EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
3772             */
3773            EDIT_EM_ScrollCaret(es);
3774        }
3775        /* force scroll info update */
3776        EDIT_UpdateScrollInfo(es);
3777        /* The rule seems to return 1 here for success */
3778        /* Power Builder masked edit controls will crash  */
3779        /* if not. */
3780        /* FIXME: is that in all cases so ? */
3781        return 1;
3782 }
3783
3784
3785 /*********************************************************************
3786  *
3787  *      WM_DESTROY
3788  *
3789  */
3790 static LRESULT EDIT_WM_Destroy(EDITSTATE *es)
3791 {
3792         LINEDEF *pc, *pp;
3793
3794         if (es->hloc32W) {
3795                 while (LocalUnlock(es->hloc32W)) ;
3796                 LocalFree(es->hloc32W);
3797         }
3798         if (es->hloc32A) {
3799                 while (LocalUnlock(es->hloc32A)) ;
3800                 LocalFree(es->hloc32A);
3801         }
3802         if (es->hloc16) {
3803                 HINSTANCE16 hInstance = GetWindowWord( es->hwndSelf, GWL_HINSTANCE );
3804                 while (LOCAL_Unlock(hInstance, es->hloc16)) ;
3805                 LOCAL_Free(hInstance, es->hloc16);
3806         }
3807
3808         pc = es->first_line_def;
3809         while (pc)
3810         {
3811                 pp = pc->next;
3812                 HeapFree(GetProcessHeap(), 0, pc);
3813                 pc = pp;
3814         }
3815
3816         SetWindowLongW( es->hwndSelf, 0, 0 );
3817         HeapFree(GetProcessHeap(), 0, es);
3818
3819         return 0;
3820 }
3821
3822
3823 /*********************************************************************
3824  *
3825  *      WM_ERASEBKGND
3826  *
3827  */
3828 static LRESULT EDIT_WM_EraseBkGnd(EDITSTATE *es, HDC dc)
3829 {
3830         HBRUSH brush;
3831         RECT rc;
3832
3833         if (!(brush = EDIT_NotifyCtlColor(es, dc)))
3834                 brush = (HBRUSH)GetStockObject(WHITE_BRUSH);
3835
3836         GetClientRect(es->hwndSelf, &rc);
3837         IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
3838         GetClipBox(dc, &rc);
3839         /*
3840          *      FIXME:  specs say that we should UnrealizeObject() the brush,
3841          *              but the specs of UnrealizeObject() say that we shouldn't
3842          *              unrealize a stock object.  The default brush that
3843          *              DefWndProc() returns is ... a stock object.
3844          */
3845         FillRect(dc, &rc, brush);
3846         return -1;
3847 }
3848
3849
3850 /*********************************************************************
3851  *
3852  *      WM_GETTEXT
3853  *
3854  */
3855 static INT EDIT_WM_GetText(EDITSTATE *es, INT count, LPARAM lParam, BOOL unicode)
3856 {
3857     if(!count) return 0;
3858
3859     if(unicode)
3860     {
3861         LPWSTR textW = (LPWSTR)lParam;
3862         lstrcpynW(textW, es->text, count);
3863         return strlenW(textW);
3864     }
3865     else
3866     {
3867         LPSTR textA = (LPSTR)lParam;
3868         if (!WideCharToMultiByte(CP_ACP, 0, es->text, -1, textA, count, NULL, NULL))
3869             textA[count - 1] = 0; /* ensure 0 termination */
3870         return strlen(textA);
3871     }
3872 }
3873
3874 /*********************************************************************
3875  *
3876  *      WM_HSCROLL
3877  *
3878  */
3879 static LRESULT EDIT_WM_HScroll(EDITSTATE *es, INT action, INT pos)
3880 {
3881         INT dx;
3882         INT fw;
3883
3884         if (!(es->style & ES_MULTILINE))
3885                 return 0;
3886
3887         if (!(es->style & ES_AUTOHSCROLL))
3888                 return 0;
3889
3890         dx = 0;
3891         fw = es->format_rect.right - es->format_rect.left;
3892         switch (action) {
3893         case SB_LINELEFT:
3894                 TRACE("SB_LINELEFT\n");
3895                 if (es->x_offset)
3896                         dx = -es->char_width;
3897                 break;
3898         case SB_LINERIGHT:
3899                 TRACE("SB_LINERIGHT\n");
3900                 if (es->x_offset < es->text_width)
3901                         dx = es->char_width;
3902                 break;
3903         case SB_PAGELEFT:
3904                 TRACE("SB_PAGELEFT\n");
3905                 if (es->x_offset)
3906                         dx = -fw / HSCROLL_FRACTION / es->char_width * es->char_width;
3907                 break;
3908         case SB_PAGERIGHT:
3909                 TRACE("SB_PAGERIGHT\n");
3910                 if (es->x_offset < es->text_width)
3911                         dx = fw / HSCROLL_FRACTION / es->char_width * es->char_width;
3912                 break;
3913         case SB_LEFT:
3914                 TRACE("SB_LEFT\n");
3915                 if (es->x_offset)
3916                         dx = -es->x_offset;
3917                 break;
3918         case SB_RIGHT:
3919                 TRACE("SB_RIGHT\n");
3920                 if (es->x_offset < es->text_width)
3921                         dx = es->text_width - es->x_offset;
3922                 break;
3923         case SB_THUMBTRACK:
3924                 TRACE("SB_THUMBTRACK %d\n", pos);
3925                 es->flags |= EF_HSCROLL_TRACK;
3926                 if(es->style & WS_HSCROLL)
3927                     dx = pos - es->x_offset;
3928                 else
3929                 {
3930                     INT fw, new_x;
3931                     /* Sanity check */
3932                     if(pos < 0 || pos > 100) return 0;
3933                     /* Assume default scroll range 0-100 */
3934                     fw = es->format_rect.right - es->format_rect.left;
3935                     new_x = pos * (es->text_width - fw) / 100;
3936                     dx = es->text_width ? (new_x - es->x_offset) : 0;
3937                 }
3938                 break;
3939         case SB_THUMBPOSITION:
3940                 TRACE("SB_THUMBPOSITION %d\n", pos);
3941                 es->flags &= ~EF_HSCROLL_TRACK;
3942                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
3943                     dx = pos - es->x_offset;
3944                 else
3945                 {
3946                     INT fw, new_x;
3947                     /* Sanity check */
3948                     if(pos < 0 || pos > 100) return 0;
3949                     /* Assume default scroll range 0-100 */
3950                     fw = es->format_rect.right - es->format_rect.left;
3951                     new_x = pos * (es->text_width - fw) / 100;
3952                     dx = es->text_width ? (new_x - es->x_offset) : 0;
3953                 }
3954                 if (!dx) {
3955                         /* force scroll info update */
3956                         EDIT_UpdateScrollInfo(es);
3957                         EDIT_NOTIFY_PARENT(es, EN_HSCROLL, "EN_HSCROLL");
3958                 }
3959                 break;
3960         case SB_ENDSCROLL:
3961                 TRACE("SB_ENDSCROLL\n");
3962                 break;
3963         /*
3964          *      FIXME : the next two are undocumented !
3965          *      Are we doing the right thing ?
3966          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
3967          *      although it's also a regular control message.
3968          */
3969         case EM_GETTHUMB: /* this one is used by NT notepad */
3970         case EM_GETTHUMB16:
3971         {
3972                 LRESULT ret;
3973                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_HSCROLL)
3974                     ret = GetScrollPos(es->hwndSelf, SB_HORZ);
3975                 else
3976                 {
3977                     /* Assume default scroll range 0-100 */
3978                     INT fw = es->format_rect.right - es->format_rect.left;
3979                     ret = es->text_width ? es->x_offset * 100 / (es->text_width - fw) : 0;
3980                 }
3981                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
3982                 return ret;
3983         }
3984         case EM_LINESCROLL16:
3985                 TRACE("EM_LINESCROLL16\n");
3986                 dx = pos;
3987                 break;
3988
3989         default:
3990                 ERR("undocumented WM_HSCROLL action %d (0x%04x), please report\n",
3991                     action, action);
3992                 return 0;
3993         }
3994         if (dx)
3995         {
3996             INT fw = es->format_rect.right - es->format_rect.left;
3997             /* check if we are going to move too far */
3998             if(es->x_offset + dx + fw > es->text_width)
3999                 dx = es->text_width - fw - es->x_offset;
4000             if(dx)
4001                 EDIT_EM_LineScroll_internal(es, dx, 0);
4002         }
4003         return 0;
4004 }
4005
4006
4007 /*********************************************************************
4008  *
4009  *      EDIT_CheckCombo
4010  *
4011  */
4012 static BOOL EDIT_CheckCombo(EDITSTATE *es, UINT msg, INT key)
4013 {
4014    HWND hLBox = es->hwndListBox;
4015    HWND hCombo;
4016    BOOL bDropped;
4017    int  nEUI;
4018
4019    if (!hLBox)
4020       return FALSE;
4021
4022    hCombo   = GetParent(es->hwndSelf);
4023    bDropped = TRUE;
4024    nEUI     = 0;
4025
4026    TRACE_(combo)("[%p]: handling msg %x (%x)\n", es->hwndSelf, msg, key);
4027
4028    if (key == VK_UP || key == VK_DOWN)
4029    {
4030       if (SendMessageW(hCombo, CB_GETEXTENDEDUI, 0, 0))
4031          nEUI = 1;
4032
4033       if (msg == WM_KEYDOWN || nEUI)
4034           bDropped = (BOOL)SendMessageW(hCombo, CB_GETDROPPEDSTATE, 0, 0);
4035    }
4036
4037    switch (msg)
4038    {
4039       case WM_KEYDOWN:
4040          if (!bDropped && nEUI && (key == VK_UP || key == VK_DOWN))
4041          {
4042             /* make sure ComboLBox pops up */
4043             SendMessageW(hCombo, CB_SETEXTENDEDUI, FALSE, 0);
4044             key = VK_F4;
4045             nEUI = 2;
4046          }
4047
4048          SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)key, 0);
4049          break;
4050
4051       case WM_SYSKEYDOWN: /* Handle Alt+up/down arrows */
4052          if (nEUI)
4053             SendMessageW(hCombo, CB_SHOWDROPDOWN, bDropped ? FALSE : TRUE, 0);
4054          else
4055             SendMessageW(hLBox, WM_KEYDOWN, (WPARAM)VK_F4, 0);
4056          break;
4057    }
4058
4059    if(nEUI == 2)
4060       SendMessageW(hCombo, CB_SETEXTENDEDUI, TRUE, 0);
4061
4062    return TRUE;
4063 }
4064
4065
4066 /*********************************************************************
4067  *
4068  *      WM_KEYDOWN
4069  *
4070  *      Handling of special keys that don't produce a WM_CHAR
4071  *      (i.e. non-printable keys) & Backspace & Delete
4072  *
4073  */
4074 static LRESULT EDIT_WM_KeyDown(EDITSTATE *es, INT key)
4075 {
4076         BOOL shift;
4077         BOOL control;
4078
4079         if (GetKeyState(VK_MENU) & 0x8000)
4080                 return 0;
4081
4082         shift = GetKeyState(VK_SHIFT) & 0x8000;
4083         control = GetKeyState(VK_CONTROL) & 0x8000;
4084
4085         switch (key) {
4086         case VK_F4:
4087         case VK_UP:
4088                 if (EDIT_CheckCombo(es, WM_KEYDOWN, key) || key == VK_F4)
4089                         break;
4090
4091                 /* fall through */
4092         case VK_LEFT:
4093                 if ((es->style & ES_MULTILINE) && (key == VK_UP))
4094                         EDIT_MoveUp_ML(es, shift);
4095                 else
4096                         if (control)
4097                                 EDIT_MoveWordBackward(es, shift);
4098                         else
4099                                 EDIT_MoveBackward(es, shift);
4100                 break;
4101         case VK_DOWN:
4102                 if (EDIT_CheckCombo(es, WM_KEYDOWN, key))
4103                         break;
4104                 /* fall through */
4105         case VK_RIGHT:
4106                 if ((es->style & ES_MULTILINE) && (key == VK_DOWN))
4107                         EDIT_MoveDown_ML(es, shift);
4108                 else if (control)
4109                         EDIT_MoveWordForward(es, shift);
4110                 else
4111                         EDIT_MoveForward(es, shift);
4112                 break;
4113         case VK_HOME:
4114                 EDIT_MoveHome(es, shift);
4115                 break;
4116         case VK_END:
4117                 EDIT_MoveEnd(es, shift);
4118                 break;
4119         case VK_PRIOR:
4120                 if (es->style & ES_MULTILINE)
4121                         EDIT_MovePageUp_ML(es, shift);
4122                 else
4123                         EDIT_CheckCombo(es, WM_KEYDOWN, key);
4124                 break;
4125         case VK_NEXT:
4126                 if (es->style & ES_MULTILINE)
4127                         EDIT_MovePageDown_ML(es, shift);
4128                 else
4129                         EDIT_CheckCombo(es, WM_KEYDOWN, key);
4130                 break;
4131         case VK_DELETE:
4132                 if (!(es->style & ES_READONLY) && !(shift && control)) {
4133                         if (es->selection_start != es->selection_end) {
4134                                 if (shift)
4135                                         EDIT_WM_Cut(es);
4136                                 else
4137                                         EDIT_WM_Clear(es);
4138                         } else {
4139                                 if (shift) {
4140                                         /* delete character left of caret */
4141                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4142                                         EDIT_MoveBackward(es, TRUE);
4143                                         EDIT_WM_Clear(es);
4144                                 } else if (control) {
4145                                         /* delete to end of line */
4146                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4147                                         EDIT_MoveEnd(es, TRUE);
4148                                         EDIT_WM_Clear(es);
4149                                 } else {
4150                                         /* delete character right of caret */
4151                                         EDIT_EM_SetSel(es, (UINT)-1, 0, FALSE);
4152                                         EDIT_MoveForward(es, TRUE);
4153                                         EDIT_WM_Clear(es);
4154                                 }
4155                         }
4156                 }
4157                 break;
4158         case VK_INSERT:
4159                 if (shift) {
4160                         if (!(es->style & ES_READONLY))
4161                                 EDIT_WM_Paste(es);
4162                 } else if (control)
4163                         EDIT_WM_Copy(es);
4164                 break;
4165         case VK_RETURN:
4166             /* If the edit doesn't want the return send a message to the default object */
4167             if(!(es->style & ES_WANTRETURN))
4168             {
4169                 HWND hwndParent = GetParent(es->hwndSelf);
4170                 DWORD dw = SendMessageW( hwndParent, DM_GETDEFID, 0, 0 );
4171                 if (HIWORD(dw) == DC_HASDEFID)
4172                 {
4173                     SendMessageW( hwndParent, WM_COMMAND,
4174                                   MAKEWPARAM( LOWORD(dw), BN_CLICKED ),
4175                               (LPARAM)GetDlgItem( hwndParent, LOWORD(dw) ) );
4176                 }
4177             }
4178             break;
4179         }
4180         return 0;
4181 }
4182
4183
4184 /*********************************************************************
4185  *
4186  *      WM_KILLFOCUS
4187  *
4188  */
4189 static LRESULT EDIT_WM_KillFocus(EDITSTATE *es)
4190 {
4191         es->flags &= ~EF_FOCUSED;
4192         DestroyCaret();
4193         if(!(es->style & ES_NOHIDESEL))
4194                 EDIT_InvalidateText(es, es->selection_start, es->selection_end);
4195         EDIT_NOTIFY_PARENT(es, EN_KILLFOCUS, "EN_KILLFOCUS");
4196         return 0;
4197 }
4198
4199
4200 /*********************************************************************
4201  *
4202  *      WM_LBUTTONDBLCLK
4203  *
4204  *      The caret position has been set on the WM_LBUTTONDOWN message
4205  *
4206  */
4207 static LRESULT EDIT_WM_LButtonDblClk(EDITSTATE *es)
4208 {
4209         INT s;
4210         INT e = es->selection_end;
4211         INT l;
4212         INT li;
4213         INT ll;
4214
4215         if (!(es->flags & EF_FOCUSED))
4216                 return 0;
4217
4218         l = EDIT_EM_LineFromChar(es, e);
4219         li = EDIT_EM_LineIndex(es, l);
4220         ll = EDIT_EM_LineLength(es, e);
4221         s = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_LEFT);
4222         e = li + EDIT_CallWordBreakProc(es, li, e - li, ll, WB_RIGHT);
4223         EDIT_EM_SetSel(es, s, e, FALSE);
4224         EDIT_EM_ScrollCaret(es);
4225         return 0;
4226 }
4227
4228
4229 /*********************************************************************
4230  *
4231  *      WM_LBUTTONDOWN
4232  *
4233  */
4234 static LRESULT EDIT_WM_LButtonDown(EDITSTATE *es, DWORD keys, INT x, INT y)
4235 {
4236         INT e;
4237         BOOL after_wrap;
4238
4239         SetFocus(es->hwndSelf);
4240         if (!(es->flags & EF_FOCUSED))
4241                 return 0;
4242
4243         es->bCaptureState = TRUE;
4244         SetCapture(es->hwndSelf);
4245         EDIT_ConfinePoint(es, &x, &y);
4246         e = EDIT_CharFromPos(es, x, y, &after_wrap);
4247         EDIT_EM_SetSel(es, (keys & MK_SHIFT) ? es->selection_start : e, e, after_wrap);
4248         EDIT_EM_ScrollCaret(es);
4249         es->region_posx = es->region_posy = 0;
4250         SetTimer(es->hwndSelf, 0, 100, NULL);
4251         return 0;
4252 }
4253
4254
4255 /*********************************************************************
4256  *
4257  *      WM_LBUTTONUP
4258  *
4259  */
4260 static LRESULT EDIT_WM_LButtonUp(EDITSTATE *es)
4261 {
4262         if (es->bCaptureState) {
4263                 KillTimer(es->hwndSelf, 0);
4264                 if (GetCapture() == es->hwndSelf) ReleaseCapture();
4265         }
4266         es->bCaptureState = FALSE;
4267         return 0;
4268 }
4269
4270
4271 /*********************************************************************
4272  *
4273  *      WM_MBUTTONDOWN
4274  *
4275  */
4276 static LRESULT EDIT_WM_MButtonDown(EDITSTATE *es)
4277 {
4278     SendMessageW(es->hwndSelf, WM_PASTE, 0, 0);
4279     return 0;
4280 }
4281
4282
4283 /*********************************************************************
4284  *
4285  *      WM_MOUSEMOVE
4286  *
4287  */
4288 static LRESULT EDIT_WM_MouseMove(EDITSTATE *es, INT x, INT y)
4289 {
4290         INT e;
4291         BOOL after_wrap;
4292         INT prex, prey;
4293
4294         if (GetCapture() != es->hwndSelf)
4295                 return 0;
4296
4297         /*
4298          *      FIXME: gotta do some scrolling if outside client
4299          *              area.  Maybe reset the timer ?
4300          */
4301         prex = x; prey = y;
4302         EDIT_ConfinePoint(es, &x, &y);
4303         es->region_posx = (prex < x) ? -1 : ((prex > x) ? 1 : 0);
4304         es->region_posy = (prey < y) ? -1 : ((prey > y) ? 1 : 0);
4305         e = EDIT_CharFromPos(es, x, y, &after_wrap);
4306         EDIT_EM_SetSel(es, es->selection_start, e, after_wrap);
4307         EDIT_SetCaretPos(es,es->selection_end,es->flags & EF_AFTER_WRAP);
4308         return 0;
4309 }
4310
4311
4312 /*********************************************************************
4313  *
4314  *      WM_NCCREATE
4315  *
4316  * See also EDIT_WM_StyleChanged
4317  */
4318 static LRESULT EDIT_WM_NCCreate(HWND hwnd, LPCREATESTRUCTW lpcs, BOOL unicode)
4319 {
4320         EDITSTATE *es;
4321         UINT alloc_size;
4322
4323         TRACE("Creating %s edit control, style = %08lx\n",
4324                 unicode ? "Unicode" : "ANSI", lpcs->style);
4325
4326         if (!(es = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*es))))
4327                 return FALSE;
4328         SetWindowLongW( hwnd, 0, (LONG)es );
4329
4330        /*
4331         *      Note: since the EDITSTATE has not been fully initialized yet,
4332         *            we can't use any API calls that may send
4333         *            WM_XXX messages before WM_NCCREATE is completed.
4334         */
4335
4336         es->is_unicode = unicode;
4337         es->style = lpcs->style;
4338
4339         es->bEnableState = !(es->style & WS_DISABLED);
4340
4341         es->hwndSelf = hwnd;
4342         /* Save parent, which will be notified by EN_* messages */
4343         es->hwndParent = lpcs->hwndParent;
4344
4345         if (es->style & ES_COMBO)
4346            es->hwndListBox = GetDlgItem(es->hwndParent, ID_CB_LISTBOX);
4347
4348         /* Number overrides lowercase overrides uppercase (at least it
4349          * does in Win95).  However I'll bet that ES_NUMBER would be
4350          * invalid under Win 3.1.
4351          */
4352         if (es->style & ES_NUMBER) {
4353                 ; /* do not override the ES_NUMBER */
4354         }  else if (es->style & ES_LOWERCASE) {
4355                 es->style &= ~ES_UPPERCASE;
4356         }
4357         if (es->style & ES_MULTILINE) {
4358                 es->buffer_limit = BUFLIMIT_MULTI;
4359                 if (es->style & WS_VSCROLL)
4360                         es->style |= ES_AUTOVSCROLL;
4361                 if (es->style & WS_HSCROLL)
4362                         es->style |= ES_AUTOHSCROLL;
4363                 es->style &= ~ES_PASSWORD;
4364                 if ((es->style & ES_CENTER) || (es->style & ES_RIGHT)) {
4365                         /* Confirmed - RIGHT overrides CENTER */
4366                         if (es->style & ES_RIGHT)
4367                                 es->style &= ~ES_CENTER;
4368                         es->style &= ~WS_HSCROLL;
4369                         es->style &= ~ES_AUTOHSCROLL;
4370                 }
4371
4372                 /* FIXME: for now, all multi line controls are AUTOVSCROLL */
4373                 es->style |= ES_AUTOVSCROLL;
4374         } else {
4375                 es->buffer_limit = BUFLIMIT_SINGLE;
4376                 if (WIN31_LOOK == TWEAK_WineLook ||
4377                     WIN95_LOOK == TWEAK_WineLook) {
4378                         es->style &= ~ES_CENTER;
4379                         es->style &= ~ES_RIGHT;
4380                 } else {
4381                         if (es->style & ES_RIGHT)
4382                                 es->style &= ~ES_CENTER;
4383                 }
4384                 es->style &= ~WS_HSCROLL;
4385                 es->style &= ~WS_VSCROLL;
4386                 es->style &= ~ES_AUTOVSCROLL;
4387                 es->style &= ~ES_WANTRETURN;
4388                 if (es->style & ES_PASSWORD)
4389                         es->password_char = '*';
4390
4391                 /* FIXME: for now, all single line controls are AUTOHSCROLL */
4392                 es->style |= ES_AUTOHSCROLL;
4393         }
4394
4395         alloc_size = ROUND_TO_GROW((es->buffer_size + 1) * sizeof(WCHAR));
4396         if(!(es->hloc32W = LocalAlloc(LMEM_MOVEABLE | LMEM_ZEROINIT, alloc_size)))
4397             return FALSE;
4398         es->buffer_size = LocalSize(es->hloc32W)/sizeof(WCHAR) - 1;
4399
4400         if (!(es->undo_text = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (es->buffer_size + 1) * sizeof(WCHAR))))
4401                 return FALSE;
4402         es->undo_buffer_size = es->buffer_size;
4403
4404         if (es->style & ES_MULTILINE)
4405                 if (!(es->first_line_def = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LINEDEF))))
4406                         return FALSE;
4407         es->line_count = 1;
4408
4409         /*
4410          * In Win95 look and feel, the WS_BORDER style is replaced by the
4411          * WS_EX_CLIENTEDGE style for the edit control. This gives the edit
4412          * control a non client area.  Not always.  This coordinates in some
4413          * way with the window creation code in dialog.c  When making
4414          * modifications please ensure that the code still works for edit
4415          * controls created directly with style 0x50800000, exStyle 0 (
4416          * which should have a single pixel border)
4417          */
4418         if (TWEAK_WineLook != WIN31_LOOK)
4419         {
4420           es->style      &= ~WS_BORDER;
4421         }
4422         else
4423         {
4424           if ((es->style & WS_BORDER) && !(es->style & WS_DLGFRAME))
4425               SetWindowLongW( hwnd, GWL_STYLE,
4426                               GetWindowLongW( hwnd, GWL_STYLE ) & ~WS_BORDER );
4427         }
4428
4429         return TRUE;
4430 }
4431
4432 /*********************************************************************
4433  *
4434  *      WM_PAINT
4435  *
4436  */
4437 static void EDIT_WM_Paint(EDITSTATE *es, WPARAM wParam)
4438 {
4439         PAINTSTRUCT ps;
4440         INT i;
4441         HDC dc;
4442         HFONT old_font = 0;
4443         RECT rc;
4444         RECT rcLine;
4445         RECT rcRgn;
4446         BOOL rev = es->bEnableState &&
4447                                 ((es->flags & EF_FOCUSED) ||
4448                                         (es->style & ES_NOHIDESEL));
4449         if (!wParam)
4450             dc = BeginPaint(es->hwndSelf, &ps);
4451         else
4452             dc = (HDC) wParam;
4453         if(es->style & WS_BORDER) {
4454                 GetClientRect(es->hwndSelf, &rc);
4455                 if(es->style & ES_MULTILINE) {
4456                         if(es->style & WS_HSCROLL) rc.bottom++;
4457                         if(es->style & WS_VSCROLL) rc.right++;
4458                 }
4459                 Rectangle(dc, rc.left, rc.top, rc.right, rc.bottom);
4460         }
4461         IntersectClipRect(dc, es->format_rect.left,
4462                                 es->format_rect.top,
4463                                 es->format_rect.right,
4464                                 es->format_rect.bottom);
4465         if (es->style & ES_MULTILINE) {
4466                 GetClientRect(es->hwndSelf, &rc);
4467                 IntersectClipRect(dc, rc.left, rc.top, rc.right, rc.bottom);
4468         }
4469         if (es->font)
4470                 old_font = SelectObject(dc, es->font);
4471         EDIT_NotifyCtlColor(es, dc);
4472
4473         if (!es->bEnableState)
4474                 SetTextColor(dc, GetSysColor(COLOR_GRAYTEXT));
4475         GetClipBox(dc, &rcRgn);
4476         if (es->style & ES_MULTILINE) {
4477                 INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4478                 for (i = es->y_offset ; i <= min(es->y_offset + vlc, es->y_offset + es->line_count - 1) ; i++) {
4479                         EDIT_GetLineRect(es, i, 0, -1, &rcLine);
4480                         if (IntersectRect(&rc, &rcRgn, &rcLine))
4481                                 EDIT_PaintLine(es, dc, i, rev);
4482                 }
4483         } else {
4484                 EDIT_GetLineRect(es, 0, 0, -1, &rcLine);
4485                 if (IntersectRect(&rc, &rcRgn, &rcLine))
4486                         EDIT_PaintLine(es, dc, 0, rev);
4487         }
4488         if (es->font)
4489                 SelectObject(dc, old_font);
4490
4491         if (!wParam)
4492             EndPaint(es->hwndSelf, &ps);
4493 }
4494
4495
4496 /*********************************************************************
4497  *
4498  *      WM_PASTE
4499  *
4500  */
4501 static void EDIT_WM_Paste(EDITSTATE *es)
4502 {
4503         HGLOBAL hsrc;
4504         LPWSTR src;
4505
4506         /* Protect read-only edit control from modification */
4507         if(es->style & ES_READONLY)
4508             return;
4509
4510         OpenClipboard(es->hwndSelf);
4511         if ((hsrc = GetClipboardData(CF_UNICODETEXT))) {
4512                 src = (LPWSTR)GlobalLock(hsrc);
4513                 EDIT_EM_ReplaceSel(es, TRUE, src, TRUE, TRUE);
4514                 GlobalUnlock(hsrc);
4515         }
4516         CloseClipboard();
4517 }
4518
4519
4520 /*********************************************************************
4521  *
4522  *      WM_SETFOCUS
4523  *
4524  */
4525 static void EDIT_WM_SetFocus(EDITSTATE *es)
4526 {
4527         es->flags |= EF_FOCUSED;
4528         CreateCaret(es->hwndSelf, 0, 2, es->line_height);
4529         EDIT_SetCaretPos(es, es->selection_end,
4530                          es->flags & EF_AFTER_WRAP);
4531         if(!(es->style & ES_NOHIDESEL))
4532                 EDIT_InvalidateText(es, es->selection_start, es->selection_end);
4533         ShowCaret(es->hwndSelf);
4534         EDIT_NOTIFY_PARENT(es, EN_SETFOCUS, "EN_SETFOCUS");
4535 }
4536
4537
4538 /*********************************************************************
4539  *
4540  *      WM_SETFONT
4541  *
4542  * With Win95 look the margins are set to default font value unless
4543  * the system font (font == 0) is being set, in which case they are left
4544  * unchanged.
4545  *
4546  */
4547 static void EDIT_WM_SetFont(EDITSTATE *es, HFONT font, BOOL redraw)
4548 {
4549         TEXTMETRICW tm;
4550         HDC dc;
4551         HFONT old_font = 0;
4552         RECT r;
4553
4554         es->font = font;
4555         dc = GetDC(es->hwndSelf);
4556         if (font)
4557                 old_font = SelectObject(dc, font);
4558         GetTextMetricsW(dc, &tm);
4559         es->line_height = tm.tmHeight;
4560         es->char_width = tm.tmAveCharWidth;
4561         if (font)
4562                 SelectObject(dc, old_font);
4563         ReleaseDC(es->hwndSelf, dc);
4564         if (font && (TWEAK_WineLook > WIN31_LOOK))
4565                 EDIT_EM_SetMargins(es, EC_LEFTMARGIN | EC_RIGHTMARGIN,
4566                                    EC_USEFONTINFO, EC_USEFONTINFO);
4567
4568         /* Force the recalculation of the format rect for each font change */
4569         GetClientRect(es->hwndSelf, &r);
4570         EDIT_SetRectNP(es, &r);
4571
4572         if (es->style & ES_MULTILINE)
4573                 EDIT_BuildLineDefs_ML(es, 0, strlenW(es->text), 0, NULL);
4574         else
4575             EDIT_CalcLineWidth_SL(es);
4576
4577         if (redraw)
4578                 EDIT_UpdateText(es, NULL, TRUE);
4579         if (es->flags & EF_FOCUSED) {
4580                 DestroyCaret();
4581                 CreateCaret(es->hwndSelf, 0, 2, es->line_height);
4582                 EDIT_SetCaretPos(es, es->selection_end,
4583                                  es->flags & EF_AFTER_WRAP);
4584                 ShowCaret(es->hwndSelf);
4585         }
4586 }
4587
4588
4589 /*********************************************************************
4590  *
4591  *      WM_SETTEXT
4592  *
4593  * NOTES
4594  *  For multiline controls (ES_MULTILINE), reception of WM_SETTEXT triggers:
4595  *  The modified flag is reset. No notifications are sent.
4596  *
4597  *  For single-line controls, reception of WM_SETTEXT triggers:
4598  *  The modified flag is reset. EN_UPDATE and EN_CHANGE notifications are sent.
4599  *
4600  */
4601 static void EDIT_WM_SetText(EDITSTATE *es, LPARAM lParam, BOOL unicode)
4602 {
4603     LPWSTR text = NULL;
4604
4605     if(unicode)
4606         text = (LPWSTR)lParam;
4607     else if (lParam)
4608     {
4609         LPCSTR textA = (LPCSTR)lParam;
4610         INT countW = MultiByteToWideChar(CP_ACP, 0, textA, -1, NULL, 0);
4611         if((text = HeapAlloc(GetProcessHeap(), 0, countW * sizeof(WCHAR))))
4612             MultiByteToWideChar(CP_ACP, 0, textA, -1, text, countW);
4613     }
4614
4615         EDIT_EM_SetSel(es, 0, (UINT)-1, FALSE);
4616         if (text) {
4617                 TRACE("%s\n", debugstr_w(text));
4618                 EDIT_EM_ReplaceSel(es, FALSE, text, FALSE, FALSE);
4619                 if(!unicode)
4620                     HeapFree(GetProcessHeap(), 0, text);
4621         } else {
4622                 static const WCHAR empty_stringW[] = {0};
4623                 TRACE("<NULL>\n");
4624                 EDIT_EM_ReplaceSel(es, FALSE, empty_stringW, FALSE, FALSE);
4625         }
4626         es->x_offset = 0;
4627         es->flags &= ~EF_MODIFIED;
4628         EDIT_EM_SetSel(es, 0, 0, FALSE);
4629         /* Send the notification after the selection start and end have been set
4630          * edit control doesn't send notification on WM_SETTEXT
4631          * if it is multiline, or it is part of combobox
4632          */
4633         if( !((es->style & ES_MULTILINE) || es->hwndListBox))
4634        {
4635             EDIT_NOTIFY_PARENT(es, EN_CHANGE, "EN_CHANGE");
4636            EDIT_NOTIFY_PARENT(es, EN_UPDATE, "EN_UPDATE");
4637        }
4638         EDIT_EM_ScrollCaret(es);
4639 }
4640
4641
4642 /*********************************************************************
4643  *
4644  *      WM_SIZE
4645  *
4646  */
4647 static void EDIT_WM_Size(EDITSTATE *es, UINT action, INT width, INT height)
4648 {
4649         if ((action == SIZE_MAXIMIZED) || (action == SIZE_RESTORED)) {
4650                 RECT rc;
4651                 TRACE("width = %d, height = %d\n", width, height);
4652                 SetRect(&rc, 0, 0, width, height);
4653                 EDIT_SetRectNP(es, &rc);
4654                 EDIT_UpdateText(es, NULL, TRUE);
4655         }
4656 }
4657
4658
4659 /*********************************************************************
4660  *
4661  *      WM_STYLECHANGED
4662  *
4663  * This message is sent by SetWindowLong on having changed either the Style
4664  * or the extended style.
4665  *
4666  * We ensure that the window's version of the styles and the EDITSTATE's agree.
4667  *
4668  * See also EDIT_WM_NCCreate
4669  *
4670  * It appears that the Windows version of the edit control allows the style
4671  * (as retrieved by GetWindowLong) to be any value and maintains an internal
4672  * style variable which will generally be different.  In this function we
4673  * update the internal style based on what changed in the externally visible
4674  * style.
4675  *
4676  * Much of this content as based upon the MSDN, especially:
4677  *  Platform SDK Documentation -> User Interface Services ->
4678  *      Windows User Interface -> Edit Controls -> Edit Control Reference ->
4679  *      Edit Control Styles
4680  */
4681 static LRESULT  EDIT_WM_StyleChanged ( EDITSTATE *es, WPARAM which, const STYLESTRUCT *style)
4682 {
4683         if (GWL_STYLE == which) {
4684                 DWORD style_change_mask;
4685                 DWORD new_style;
4686                 /* Only a subset of changes can be applied after the control
4687                  * has been created.
4688                  */
4689                 style_change_mask = ES_UPPERCASE | ES_LOWERCASE |
4690                                     ES_NUMBER;
4691                 if (es->style & ES_MULTILINE)
4692                         style_change_mask |= ES_WANTRETURN;
4693
4694                 new_style = style->styleNew & style_change_mask;
4695
4696                 /* Number overrides lowercase overrides uppercase (at least it
4697                  * does in Win95).  However I'll bet that ES_NUMBER would be
4698                  * invalid under Win 3.1.
4699                  */
4700                 if (new_style & ES_NUMBER) {
4701                         ; /* do not override the ES_NUMBER */
4702                 }  else if (new_style & ES_LOWERCASE) {
4703                         new_style &= ~ES_UPPERCASE;
4704                 }
4705
4706                 es->style = (es->style & ~style_change_mask) | new_style;
4707         } else if (GWL_EXSTYLE == which) {
4708                 ; /* FIXME - what is needed here */
4709         } else {
4710                 WARN ("Invalid style change %d\n",which);
4711         }
4712
4713         return 0;
4714 }
4715
4716 /*********************************************************************
4717  *
4718  *      WM_SYSKEYDOWN
4719  *
4720  */
4721 static LRESULT EDIT_WM_SysKeyDown(EDITSTATE *es, INT key, DWORD key_data)
4722 {
4723         if ((key == VK_BACK) && (key_data & 0x2000)) {
4724                 if (EDIT_EM_CanUndo(es))
4725                         EDIT_EM_Undo(es);
4726                 return 0;
4727         } else if (key == VK_UP || key == VK_DOWN) {
4728                 if (EDIT_CheckCombo(es, WM_SYSKEYDOWN, key))
4729                         return 0;
4730         }
4731         return DefWindowProcW(es->hwndSelf, WM_SYSKEYDOWN, (WPARAM)key, (LPARAM)key_data);
4732 }
4733
4734
4735 /*********************************************************************
4736  *
4737  *      WM_TIMER
4738  *
4739  */
4740 static void EDIT_WM_Timer(EDITSTATE *es)
4741 {
4742         if (es->region_posx < 0) {
4743                 EDIT_MoveBackward(es, TRUE);
4744         } else if (es->region_posx > 0) {
4745                 EDIT_MoveForward(es, TRUE);
4746         }
4747 /*
4748  *      FIXME: gotta do some vertical scrolling here, like
4749  *              EDIT_EM_LineScroll(hwnd, 0, 1);
4750  */
4751 }
4752
4753 /*********************************************************************
4754  *
4755  *      WM_VSCROLL
4756  *
4757  */
4758 static LRESULT EDIT_WM_VScroll(EDITSTATE *es, INT action, INT pos)
4759 {
4760         INT dy;
4761
4762         if (!(es->style & ES_MULTILINE))
4763                 return 0;
4764
4765         if (!(es->style & ES_AUTOVSCROLL))
4766                 return 0;
4767
4768         dy = 0;
4769         switch (action) {
4770         case SB_LINEUP:
4771         case SB_LINEDOWN:
4772         case SB_PAGEUP:
4773         case SB_PAGEDOWN:
4774                 TRACE("action %d\n", action);
4775                 EDIT_EM_Scroll(es, action);
4776                 return 0;
4777         case SB_TOP:
4778                 TRACE("SB_TOP\n");
4779                 dy = -es->y_offset;
4780                 break;
4781         case SB_BOTTOM:
4782                 TRACE("SB_BOTTOM\n");
4783                 dy = es->line_count - 1 - es->y_offset;
4784                 break;
4785         case SB_THUMBTRACK:
4786                 TRACE("SB_THUMBTRACK %d\n", pos);
4787                 es->flags |= EF_VSCROLL_TRACK;
4788                 if(es->style & WS_VSCROLL)
4789                     dy = pos - es->y_offset;
4790                 else
4791                 {
4792                     /* Assume default scroll range 0-100 */
4793                     INT vlc, new_y;
4794                     /* Sanity check */
4795                     if(pos < 0 || pos > 100) return 0;
4796                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4797                     new_y = pos * (es->line_count - vlc) / 100;
4798                     dy = es->line_count ? (new_y - es->y_offset) : 0;
4799                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
4800                             es->line_count, es->y_offset, pos, dy);
4801                 }
4802                 break;
4803         case SB_THUMBPOSITION:
4804                 TRACE("SB_THUMBPOSITION %d\n", pos);
4805                 es->flags &= ~EF_VSCROLL_TRACK;
4806                 if(es->style & WS_VSCROLL)
4807                     dy = pos - es->y_offset;
4808                 else
4809                 {
4810                     /* Assume default scroll range 0-100 */
4811                     INT vlc, new_y;
4812                     /* Sanity check */
4813                     if(pos < 0 || pos > 100) return 0;
4814                     vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4815                     new_y = pos * (es->line_count - vlc) / 100;
4816                     dy = es->line_count ? (new_y - es->y_offset) : 0;
4817                     TRACE("line_count=%d, y_offset=%d, pos=%d, dy = %d\n",
4818                             es->line_count, es->y_offset, pos, dy);
4819                 }
4820                 if (!dy)
4821                 {
4822                         /* force scroll info update */
4823                         EDIT_UpdateScrollInfo(es);
4824                         EDIT_NOTIFY_PARENT(es, EN_VSCROLL, "EN_VSCROLL");
4825                 }
4826                 break;
4827         case SB_ENDSCROLL:
4828                 TRACE("SB_ENDSCROLL\n");
4829                 break;
4830         /*
4831          *      FIXME : the next two are undocumented !
4832          *      Are we doing the right thing ?
4833          *      At least Win 3.1 Notepad makes use of EM_GETTHUMB this way,
4834          *      although it's also a regular control message.
4835          */
4836         case EM_GETTHUMB: /* this one is used by NT notepad */
4837         case EM_GETTHUMB16:
4838         {
4839                 LRESULT ret;
4840                 if(GetWindowLongW( es->hwndSelf, GWL_STYLE ) & WS_VSCROLL)
4841                     ret = GetScrollPos(es->hwndSelf, SB_VERT);
4842                 else
4843                 {
4844                     /* Assume default scroll range 0-100 */
4845                     INT vlc = (es->format_rect.bottom - es->format_rect.top) / es->line_height;
4846                     ret = es->line_count ? es->y_offset * 100 / (es->line_count - vlc) : 0;
4847                 }
4848                 TRACE("EM_GETTHUMB: returning %ld\n", ret);
4849                 return ret;
4850         }
4851         case EM_LINESCROLL16:
4852                 TRACE("EM_LINESCROLL16 %d\n", pos);
4853                 dy = pos;
4854                 break;
4855
4856         default:
4857                 ERR("undocumented WM_VSCROLL action %d (0x%04x), please report\n",
4858                     action, action);
4859                 return 0;
4860         }
4861         if (dy)
4862                 EDIT_EM_LineScroll(es, 0, dy);
4863         return 0;
4864 }
4865
4866 /*********************************************************************
4867  *
4868  *      EDIT_UpdateText
4869  *
4870  */
4871 static void EDIT_UpdateTextRegion(EDITSTATE *es, HRGN hrgn, BOOL bErase)
4872 {
4873     if (es->flags & EF_UPDATE) EDIT_NOTIFY_PARENT(es, EN_UPDATE, "EN_UPDATE");
4874     InvalidateRgn(es->hwndSelf, hrgn, bErase);
4875 }
4876
4877
4878 /*********************************************************************
4879  *
4880  *      EDIT_UpdateText
4881  *
4882  */
4883 static void EDIT_UpdateText(EDITSTATE *es, LPRECT rc, BOOL bErase)
4884 {
4885     if (es->flags & EF_UPDATE) EDIT_NOTIFY_PARENT(es, EN_UPDATE, "EN_UPDATE");
4886     InvalidateRect(es->hwndSelf, rc, bErase);
4887 }